CN101202835B - Electronic imaging apparatus - Google Patents
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- CN101202835B CN101202835B CN2007100020749A CN200710002074A CN101202835B CN 101202835 B CN101202835 B CN 101202835B CN 2007100020749 A CN2007100020749 A CN 2007100020749A CN 200710002074 A CN200710002074 A CN 200710002074A CN 101202835 B CN101202835 B CN 101202835B
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Abstract
The present invention presents a plan of an electronic imaging device which has the dustproof function that the dust adhered on the forming component is assuredly eliminated when the detachable accessory devices are removed. The electronic imaging device is a device (camera) where an accessory such as a recording medium (27), an external power source (70) or an electronic flash unit (80) can be attached and detached, and comprises a photographic lens (1) which forms an optical image of a subject, a CCD unit (22), a constitution member (dust-proof glass 30) arranged between the CCD and the photographic lens, and a dust removing means (a piezoelectric element 31 and a dust-proof glass driving circuit 40) which removes stuck dust by vibrating the glass at a plurality of kinds of frequencies and efficiently performs the dust removing operation through the resonating operation of a piezoelectric element (31) in effective timing corresponding to the attachment of one of the accessories.
Description
The application be that May 16, application number in 2003 are 03136203.6 the applying date, denomination of invention divides an application for the patent application of " electronic image pickup device ".
Technical field
The present invention relates to a kind of electronic image pickup device that imaging apparatus is arranged, relate to a kind of electronic image pickup device that can remove attached to the band dust reduction capability of the dust on the component parts of for example video camera (カ メ ラ) system etc.
Background technology
In the past, the example as the technology of the dust reduction capability of relevant Optical devices proposed to remove attached to the such technical scheme of this dust on glass by the cover glass (dustproof glass) of vibration protection imaging apparatus.The for example special scheme of being willing to flat 2000-401291 number explanation of Japan Patent is specifically arranged, here with the device of piezoelectric element as the vibration glass plate.This piezoelectric element is for corresponding with the voltage that applies flexible, the member of the glass plate of being installed with 1 periodic vibration of regulation.
Loading and unloading freely provide various annexes (ア Network セ サ リ) devices, during use desirable accessories apparatus are installed on its body and use.But in occasions such as video cameras, except that the loading and unloading lens changeable, loading and unloading during accessories apparatus air outside be recycled to video camera inside, dust in air enters the inside of video camera, these dusts are mostly attached to the surface of lens element or CCD etc.
But, above-mentioned special open relevant the removing when the loading and unloading accessories apparatus of being willing to not have for flat 2000-401291 number attached to the dust this point on the glass plate.
Summary of the invention
Therefore, purpose of the present invention just provides a kind of positively removing when loading and unloading accessories apparatus attached to the electronic image pickup device such, the band dust reduction capability of the dust on the component parts.
Technical scheme
In order to reach the purpose that addresses the above problem, the present invention adopts following method.Promptly, according to first kind of scheme, a kind of electronic image pickup device that can load and unload accessories apparatus is proposed, comprise: with the optical image of subject be transformed into the signal of telecommunication camera head, be configured in the front of above-mentioned camera head optical element, remove dust cleaning apparatus by vibrating above-mentioned optical element attached to the dust on the surface of above-mentioned optical element, it is characterized in that, loaded onto correspondingly with above-mentioned accessories apparatus, control is carried out dedusting with above-mentioned dust cleaning apparatus and is moved.
According to second kind of scheme, a kind of electronic image pickup device is proposed, has the camera head that the optical image of subject is transformed into the signal of telecommunication, it is characterized in that, comprising: the accessories apparatus that on this electronic image pickup device, freely loads and unloads, be configured in the front of above-mentioned camera head optical element, adding vibrating device, providing frequency signal to drive the above-mentioned driving control device that adds vibrating device by giving the above-mentioned vibrating device that adds of above-mentioned optical element vibration, be provided;
Above-mentioned driving control device has to drive for the resonance frequency that detects above-mentioned optical element and above-mentionedly to add the resonance frequency detecting pattern of vibrating device and to drive the above-mentioned dedusting pattern that adds vibrating device in order removing attached to the dust on the above-mentioned optical element;
In the moment of installing above-mentioned accessories apparatus, control is carried out above-mentioned resonance frequency detecting pattern and above-mentioned dedusting mode continuous.
According to the third scheme, a kind of electronic image pickup device is proposed, have the camera head that the optical image of subject is transformed into electric signal, it is characterized in that, comprising: freely load and unload, make above-mentioned optical image to be imaged on image pickup optical system on the above-mentioned camera head with respect to above-mentioned electronic image pickup device; Be configured in the optical element between above-mentioned image pickup optical system and the above-mentioned camera head; Make the vibrating device that adds of above-mentioned optical element vibration; By providing frequency signal to drive the above-mentioned driving control device that adds vibrating device for the above-mentioned vibrating device that adds, when above-mentioned driving control device is installed on the above-mentioned electronic image pickup device when above-mentioned image pickup optical system, the above-mentioned vibrating device that adds of controlling and driving makes above-mentioned optical element vibration.
The invention effect
Like this, if adopt the present invention, can provide a kind of with dust reduction capability, in the time of can positively removing the loading and unloading accessories apparatus attached to the electronic image pickup device of the dust on the component parts.
Description of drawings
Fig. 1 represents the frame assumption diagram of structure of the video camera (カ メ ラ) of example involved in the present invention
Fig. 2 represents the circuit diagram as the circuit structure that adds vibrating device (dustproof glass drive circuit) of example of the present invention
Fig. 3 is in order to illustrate the action of dustproof glass drive circuit, the time diagram of the signal waveform in the each several part in the presentation graphs 2
The flow chart of program process when Fig. 4 represents camera body control with the video camera of microcomputer
The flow chart of the detailed process of " resonance point detects action " routine in the flow chart of Fig. 5 presentation graphs 4
The flow chart of the detailed process of " dedusting action " routine in the flow chart of Fig. 6 presentation graphs 4
Fig. 7 Fig. 7 (a) and (b) are represented the vibration shape of dustproof glass involved in the present invention, produce joint, the key diagram of whole the form with identical phase oscillation (vibration mode 1) around glass plate
Fig. 8 Fig. 8 (a) and (b) are represented the vibration shape of dustproof glass involved in the present invention, and the inboard of glass plate and the outside are with the key diagram of the form (vibration mode 2) that differs 180 ° phase oscillation
Fig. 9 represents the deposit position distribution diagram in the zone of the table relevant with frequency compensation that occupy among the EEPROM
Figure 10 Figure 10 (a) and (b) are represented the Control Parameter relevant with the frequency compensation of vibration mode, (a) be the list of expression, (b) be the list of expression with the details of vibration mode 2 corresponding Control Parameter with the details of vibration mode 1 corresponding Control Parameter
Figure 11 Figure 11 (a) and (b) represent and the corresponding offset of vibration mode, (a) are the detailed table with vibration mode 1 corresponding frequency compensation table, (b) are the detailed table with vibration mode 2 corresponding frequency compensation tables
Figure 12 represents the characteristic curve of relationship of amplitude of the vibration of driving frequency and glass plate
Embodiment
Lift below that the camera chain of imaging apparatus and various accessories apparatus is arranged is example, describe the electronic image pickup device of band dust reduction capability involved in the present invention according to example in detail.
Fig. 1 represents the structure of the camera chain of an example involved in the present invention with the square frame pie graph.This camera chain is mainly by as the main unit 100 of video camera body and as accessories apparatus for example: as the lens unit 10 of lens changeable, the recording medium 27 of noting shot image data, external power source 70 and outside formations such as electronic flash unit 80 of installing.
Camera lens fixture (not illustrating among the figure) loading and unloading of the front of the desirable lens unit 10 of user by being arranged on main unit 100 are freely being set.
Above-mentioned recording medium 27 is various storage cards or the outside external record medium of installing such as HDD, can also can be installed with by communications connector 35 and this body communication of video camera with changing.
Said external power supply 70 built-in AC/DC translation functions by attached connector 71 and plug 72, by plug 72 is inserted in the socket 37 of video camera base side, can provide necessary power supply from for example household outlet.
And above-mentioned electronic flash unit 80 is made of flashbulb 81, DC/DC transducer 82, photoflash lamp control microcomputer 83 and battery 84, can be installed with communicatedly with the video camera body by photoflash lamp communications connector 85.
The control of lens unit 10 is carried out with microcomputer (to call " Lucom " in the following text) 5 by camera lens control.The control of main unit 100 is carried out with microcomputer (to call " Bucom " in the following text) 50 by main body control.And these Lucom5 and Bucom50 can be electrically connected communicatedly by communications connector 6 when combination.So as camera chain, Lucom5 assists the Bucom50 action in running order on one side on one side from the possession.
Be provided with pick-up lens 1 and aperture 3 in the lens unit 10.Pick-up lens 1 is driven by the direct current machine that does not illustrate among the figure in the lens driving mechanism 2.Aperture 3 is by the step motor drive that does not illustrate among the figure in the aperture driving mechanism 4.Lucom5 controls these motors respectively according to the instruction of Bucom50.
Be equipped with following component parts in the main unit 100 as shown in the figure.For example, be provided with as the reflective component parts of the einzel lens of optical system (fast steering mirror body 11, pentagonal prism 12, eyepiece 13, secondary mirror body 14), the focal plane formula shutter 15 on the optical axis, be used to receive AF transducer 16 from the folded light beam automatic range of above-mentioned secondary mirror body 14.
And be provided with the spring of the preceding curtain of mirror body driving mechanism 18, the described shutter 15 of load driver of the described fast steering mirror of AF sensor drive driving circuit 17, the drive controlling body 11 of the described AF sensor unit 16 of drive controlling and back curtain shutter load maintainer 19, control these preceding curtains and back curtain action shutter control circuit 20 and according to the light measuring circuit of handling from the light beam photometry of described pentagonal prism 12 21.
Be provided with on the optical axis and be used for the CCD unit 22 of light-to-current inversion by the shot object image of above-mentioned optical system, and the dustproof glass 30 as optical element that is set between this CCD unit 22 and the pick-up lens 1 is being protected as the components of photo-electric conversion.And for example piezoelectric element 31 conducts have been installed with the part that adds vibrating device of this dustproof glass 30 of certain frequency vibration at the periphery of this dustproof glass 30.
And piezoelectric element 31 has 2 electrodes (back is described in detail), and this piezoelectric element 31 is by make dustproof glass 30 vibrations as the dustproof glass drive circuit 40 that adds the part of vibrating device, so that can remove attached to the dust on its glass surface.Therefore, this camera chain is for having the electron camera of the basic structure that belongs to so-called " video camera of band dust reduction capability ".
And,, near dustproof glass 30, be provided with temperature measuring circuit 33 in order to measure the temperature of CCD unit 22 peripheries.
This camera chain also is provided with utilizes CCD interface circuit 23, LCD monitor 24, SDRAM25, FlashROM26 as the storage area setting and the recording medium 27 etc. that are connected with CCD unit 22 to carry out the image processing control apparatus 28 of image processing, not only can provide the electro-photographic function that the electronical record Presentation Function can also be provided.
As other storage area, be provided with the nonvolatile memory 29 that for example constitutes and control the Nonvolatile memory devices of the Control Parameter of necessary regulation as storing video camera by EEPROM, can be to the Bucom50 access.
Be provided with on the Bucom50 and be used for informing that with showing to export the action of the operate condition of this video camera shows with LCD51 and camera operation switch 52 to the user.Above-mentioned camera operation switch 52 is to comprise that for example release-push, mode change switch and mains switch etc. are used to operate the switch group of the necessary operating knob of this video camera.And, be provided with battery 54, this power source voltage is transformed into the power circuit 53a that the needed voltage of each circuit unit that constitutes this camera chain provides, and established the voltage detecting circuit 53b of the variation of voltage when detecting by socket 37 from external power source 70 supplying electric currents as power supply.
The following work of camera chain each several part of Gou Chenging as mentioned above.Image processing control apparatus 28 obtains view data according to the commands for controlling CCD interface circuit 23 of Bucom50 from CCD unit 22.This view data is transformed into vision signal in CCD unit 22, and output shows on LCD monitor 24.The user confirms the image of the image of shooting according to the display image of this LCD monitor 24.
The memory that SDRAM25 uses for interim keeping view data, the service area during as the changing image data etc.And this view data is taken care of in recording medium 27 after being transformed into jpeg data.
CCD unit 22 is being protected by transparent dustproof glass 30.The peripheral edge portion of this dustproof glass 30 disposes and is used to add the piezoelectric element 31 of its glass of shaking, and this piezoelectric element 31 is driven by dustproof glass drive circuit 40, and the drive unit as this purpose as the back is described in detail moves.
It is that this point is for dustproof better in the shell that surrounds of a face and the frame that dots that CCD unit 22 and piezoelectric element 31 are accommodated in integratedly with dustproof glass 30.
Because temperature normally influences the coefficient of elasticity of the object of glass, the key factor that its eigentone is changed, must measure its temperature when therefore using, consider the variation of its eigentone.Preferably measure the front that is used for the rapid CCD unit 22 that rises of protection work temperature and the variations in temperature of the dustproof glass 30 that is provided with, prediction natural frequency at that time.
Therefore under this routine situation, be provided with the temperature that the transducer (not illustrating among the figure) that is connected with said temperature mensuration circuit 33 is used to measure CCD unit 22 peripheries.And the measuring point for the temperature of this transducer preferably is located at very near near the vibration plane of dustproof glass 30.
Mirror body (mirror) driving mechanism 18 is for being used to drive upwards position and to the mechanism of upper/lower positions of fast steering (quickly turn) mirror body 11, when this fast steering mirror body 11 is positioned at upper/lower positions, cut apart guiding AF sensor unit 16 and pentagonal prism 12 from the light beam of pick-up lens 1.
The output of the AF transducer in the AF sensor unit 16 sends Bucom50 to by AF sensor drive driving circuit 17 and carries out well-known range finding processing.
And, the user can be from the eyepiece 13 visual subjects adjacent with pentagonal prism 12, on the other hand, the part of the light beam by this pentagonal prism 12 is directed to the photoelectric sensor (not illustrating among the figure) in the light measuring circuit 21, carries out well-known photometry according to detected light quantity here and handles.
Driving and the action and the control of dustproof glass 30 of video camera of the band dust reduction capability of this example is described according to the time diagram of the circuit diagram of dustproof glass drive circuit 40 shown in Figure 2 and Fig. 3 below.
Here illustrative dustproof glass drive circuit 40 has circuit structure shown in Figure 2, produces the waveform signal (Sig1～Sig6), carry out following control according to these signals that represents with the time diagram of Fig. 3 in its each one.That is, dustproof glass drive circuit 40 advances the 1st electrode A of counter 41,1/2 frequency dividing circuit 42, inverter 43, a plurality of MOS transistor (Q00, Q01, Q02) 44a, 44b, 44c, transformer 45, resistance (R00) 46, A/D converter 60, piezoelectric element 31 by N as illustrated in Figure 2 and the 2nd electrode B 61, diode (D00) 62, resistance (R01, R02) 63/64 and electric capacity (C00) 65 arranged side by side with it constitutes.
The change action of transistor (Q01) 44b that is connected by primary side and the ON/OFF of transistor (Q02) 44c with described transformer 45, produce the signal (Sig4) of some cycles at the outlet side of this transformer 45, on one side the piezoelectric element 31 that all drivings have 2 electrode A, a B according to the signal of this some cycles is found out effective resonance frequency on one side, makes dustproof glass 30 resonate effectively (back is described in detail).
Bucom50 is by as 2 the IO port P_PwCont and the IO port D_NCnt of control port setting be present in this Bucom50 clock internal pulse generator 55 following control dustproof glass drive circuits 40.Clock pulse generator 55 is exported to N with the frequency enough faster than the signal frequency that imposes on piezoelectric element 31 with pulse signal (basic clock signal) and is advanced counter 41.The waveform signal Sig1 that this output signal is represented for the time diagram among Fig. 3.And this basic clock signal is transfused to N and advances counter 41.
This ratio by the pulse signal high capacity of frequency division and low load is not 1: 1.Therefore by 1/2 frequency dividing circuit 42 with duty ratio to conversion in 1: 1.
And this pulse signal that is transformed is corresponding with the waveform signal Sig3 that the time diagram among Fig. 3 is represented.
Under the high state of this pulse signal that is transformed, MOS transistor (Q01) 44b that has imported this signal is ON.On the other hand, this pulse signal imposes on transistor (Q02) 44c by inverter 43.Therefore, under the low state of pulse signal, transistor (Q02) 44c that has imported this signal is ON.If make transistor (Q01) 44b and transistor (Q02) 44c that are connected with the primary side of transformer 45 alternatively be ON, at the periodic signal of outlet side generation as the signal Sig4 among Fig. 3.
The coil of transformer 45 is than unit (ユ ニ Star ト) output voltage and the 31 needed voltage decisions of drive pressure electric device by power circuit 53.And resistance (R00) the 46th is provided with for limiting transformer 45 flows through excessive electric current.
During drive pressure electric device 31, transistor (Q00) 44a is in the ON state, must apply voltage to the central tap of transformer 45 from the unit (ユ ニ Star ト) of power circuit 53.The ON/OFF control of transistor among the figure (Q00) 44a is undertaken by IO port P_PwCont.N advances the set point " N " of counter 41 and can set from IO port D_NCnt.Therefore, Bucom50 is by suitably controlling the driving frequency that set point " N " can change piezoelectric element 31 arbitrarily.
At this moment, can calculate frequency according to following formula.
N: to the set point of counter, fpls: the frequency of clock pulse generator output pulse, fdrv: the frequency of the signal that applies to piezoelectric element,
Fdrv=fpls/2N ... (1 formula)
And the CPU (control device) with Bucom50 carries out according to the calculation of this formula.
For this supervisory signal of halfwave rectifier, be provided with the diode (D00) 62 that is connected with electrode B 61.And, by following the envelope that resistance (R01, R02) 63,64 behind this diode (D00) 62 and electric capacity (C00) 65 form these supervisory signals closely.The time constant that the testing circuit that is formed by these resistance (R01, R02) 63,64 and electric capacity (C00) 65 determines is different according to the different only value of glass vibration frequency.The glass plate of this example drives with 2 resonance modes (the 1st, the 2nd drive pattern).When driving frequency differs greatly in these 2 resonance modes, must adopt circuit structure in order to change time constant.With resistance (R01, R02) 63,64 supervisory signal is eased down to the level that can input to A/D converter 60.This signal is the Sig6 on the time diagram of Fig. 3.
This signal is transformed into numerical data with A/D converter 60, reads from the IO port D_DACin of Bucom50.Bucom50 can change and is set in the value that N advances in the counter 41 and makes supervisory signal reach maximum level.When advancing value (resonance frequency) the driving glass of counter 41, can remove dust effectively with the N that represents maximum level.
Main program according to control program shown in Figure 4 specifies the control that above-mentioned camera body control is carried out with microcomputer (Bucom) 50 below.
The mains switch of video camera (not illustrating among the figure) is when placing ON, and Bucom50 starts working, and at first carries out the processing that is used to start camera chain in #000.Control power circuit 53 provides power supply for each circuit unit that constitutes this camera chain.And carry out the initial setting of each circuit unit.
In #001, carry out and call " resonance point detects action " subprogram.This subprogram detects the driving frequency (resonance frequency) (back is described in detail) that is suitable for vibrating effectively dustproof glass 30.Frequency data for this reason are stored in the storage area of specified address of Bucom50.
Then in #002, carry out and call " dedusting action " subprogram.This subprogram is removed attached to the dust on the glass by adding the dustproof glass 30 that shakes with detected resonance frequency in above-mentioned #001, can remove that during not using this video camera to take user does not discover and the dust that adheres to.
In the treatment step # 003～#0105 of one of feature of the present invention, to whether various accessories apparatus being housed and state detects down successively.
At first, #003 is the step of carrying out periodically, is by communicating the action step of the state of motion detection lens unit 10 with Lucom5.And in #0041, be installed on the main unit 100 then go to #0044 if detect lens unit 10.And, turning to #0043 from #0042 when detecting when main unit 100 is taken off lens unit 10, control mark F_Lens resets.Be transferred to #005 then.
In #0044, set control mark F_Lens.This control mark is sign " 1 " when lens unit 10 is installed on the main unit 100 of this video camera, and when lens unit 10 takes off sign " 0 ".
#005 is the step of periodically carrying out, and is the step that can be installed to the state in the main unit 100 by the condition judgement detection record medium 27 that communicate connector 35.
In #0061, be installed in the main unit 100 then turn to #0064 if detect recording medium 27.Then turn to #0063 from #0062 when detecting recording medium 27 when main unit 100 is taken out, control mark F_Medum resets.Turn to #010 then.
In #0064, set control mark F_Medum.Turn to #008 then.This control mark is sign " 1 " during recording medium 27 is installed in the main unit 100 of this video camera, sign " 0 " during the taking-up.
Similarly, can judge accessories apparatus electronic flash unit 80 or external power source 70 etc. with following processing procedure.That is:
Whether #010 is the step of periodically carrying out, can be installed on the main unit 100 by detected electrons flashing light unit 80 by the condition judgement that carries out photoflash lamp communications connector 85.
In #0100, when detecting electronic flash unit 80 and be installed on the main unit 100, then turn to #0103, set control mark F_Strobe after, shift to #008.Take out from main unit 100 then shift to #0102 from #0101 if detect electronic flash unit 80, the control mark F_Strobe that resets turns to #0104 then.
And this control mark also is a sign " 1 " during electronic flash unit 80 is being adorned, sign " 0 " during the taking-up.
And #0104 also is the step of periodically carrying out, and by carrying out the condition judgement of socket 37, whether test plug 72 is inserted in the socket 37 of main unit 100.
In #0105, when inserting by plug 72 can detect the connection of external power source 70 in the sockets 37 time, turn to #008, if when external power source 70 does not connect then turn to #014.At length say,, therefore can detect owing to produce change in voltage if electric current provides to power circuit 53a and voltage detecting circuit 53b by external power source 70.Therefore, do not know connection status even do not set special control mark here yet.
If above-mentioned any one accessories apparatus is installed with, then in #008, call " resonance point detect action " subprogram, in #009 following closely, similarly carry out " dedusting action " subprogram of calling the dust that is used to remove dustproof glass 30 with above-mentioned the same execution.
Usually, be not installed in as in during on the main unit 100 of video camera body at lens unit 10, dust is attached to the possibility height on camera lens or the dustproof glass 30 etc.Therefore be preferably in and carry out the dedusting action when detecting lens unit 10 and adorning.And, if change camera lens or installation accessories device, the possibility that the inside that exists air outside to be recycled to video camera changes the video camera temperature inside.Therefore, the resonance frequency owing to this variation of temperature glass also changes.Therefore, carry out above-mentioned " resonance point detects action " that be used to determine new driving frequency (resonance frequency) in above-mentioned #008, then, the frequency with this decision in #009 is following closely carried out " dedusting is moving ".
In #014, judge whether first release-push (not illustrating among the figure) as in the camera operation switch is operated.If placing ON, first release-push turns to #015, if place OFF then turn to above-mentioned #003 once more.
In #015, obtain the luminance information of subject from light measuring circuit 21.Calculate the time for exposure (Tv value) of CCD unit 22 and the aperture settings value (Av value) of pick-up lens 1 according to this information then.
In #016, obtain the detection data of AF sensor unit 16 through AF sensor drive driving circuit 17.Calculate focus offset according to these data.
Here in #017, judge the state of F_Lens.Owing to mean that lens unit 10 does not exist during for " 0 ", therefore the later photography action of the #018 below can not be carried out.Therefore turn to above-mentioned #003 in this case once more.
In #018, send the side-play amount of focal length to Lucom5, according to the driving of this side-play amount instruction pick-up lens 1.
In #019, judge whether second release-push (not illustrating among the figure) as in the camera operation switch 52 is operated.When second release-push places ON, then turn to #0190, when OFF, then turn to above-mentioned #003 once more.
Value according to control mark F_Medum in #0190 is judged having or not of recording medium.If " 1 " in addition, then turn to above-mentioned #003 once more.If then carrying out " dedusting action " routine, " 1 " before the photography action, dirt is removed.But for fear of because this action and generation time sluggishness are not carried out " resonance point detects action " program here.
Though preferably carry out the action that these two routines (routine) produce altogether in order positively to remove dust,, omit " resonance point detects action " routine if resonance frequency does not have the possibility of variation and also can.
And the execution of omitting this routine is an exception when changing camera lens, during the power supply starting of camera chain and when removing sleep state etc.But, the execution that can omit this routine after the action of when burst mode, making a video recording for the second time.
As the shooting action, at first the Av value is flowed to Lucom5 from #020, the driving of instruction aperture 3 makes fast steering mirror body 11 upwards move the position in #021.In # 022, make the preceding curtain of shutter 15 begin traveling, open shutter 15.
In #0220, if control mark F_Strobe is set in " 1 ", then in #0230, make photoflash lamp luminous, if beyond this value then make photoflash lamp not luminous, instruction image processing control apparatus 28 is carried out the shooting action in #023.
If time representation CCD unit 22 shootings with the Tv value representation are over, then in #024, make the back curtain of shutter 15 begin traveling, in #025, drive fast steering mirror body 11 to upper/lower positions.
And meanwhile carry out loading (charge) action of shutter 15.In # 026, Lucom5 is sent the instruction that allows aperture 3 return to the release position then, in #027, image processing control apparatus 28 is sent the instruction of shot image data to recording medium 27 records.If this record image data is over, then shift to #003 once more, a succession of repeatedly same treatment step.
Describe " resonance point detects action " subprogram in detail according to flow chart shown in Figure 5 and Fig. 7 (a)～Figure 11 (b) below.Before this, in advance with reference to the supporting structure and the vibration shape of the dustproof glass 30 of Fig. 7 (a)～Fig. 8 (b) brief description resonant object.
In electronic image pickup device involved in the present invention, suppose to make being shaped as of dustproof glass 30 discoid.And add the piezoelectric element 31 of the usefulness of shaking along the circumference configuration of the glass plate of this dustproof glass 30, this glass plate is being supported with circumference.At this moment, this glass plate adds with a plurality of vibration modes (vibration shape) and shakes.The present invention selects 2 patterns separately to use from this vibration mode.The vibrational state of glass plate in the vibration mode that Fig. 7 (a) and (b) and Fig. 8 (a) and (b) are represented to select.
Fig. 7 (a) and (b) are represented the vibration shape of the related dustproof glass of this example 30 respectively.Promptly, apply vibration if be used as the piezoelectric element 31 that adds the vibrating device action, though produce non-vibrating " joint " around its glass plate, glass generally uses represented Fig. 7 of thick arrow (a) and Fig. 7 (b) state to vibrate with identical phase interaction ground repeatedly comprehensively.Such vibration shape is hereinafter referred to as " vibration mode 1 ".
Similarly, according to the frequency of the vibration that applies, the dustproof glass 30 of this example also can be with the vibration of the state shown in Fig. 8 (a) and (b) respectively.That is, the vibrational state of illustrative dustproof glass 30 is that the inboard of glass plate and the outside are to differ 180 in Fig. 8 (a) and (b).Phase oscillation.At length be stated as, illustrated vibrational state is the pattern that produces joint on every side with inside respectively of glass plate, and as shown in the figure, the vibration phase of the exterior lateral area (circular zone) of the joint of the vibration of the joint institute area surrounded of inboard and inside differs 180 °.Below be referred to as " vibration mode 2 ".
Therefore, this " resonance point detects action " subprogram shown in Figure 5 be carried out the detection action of the resonance frequency in above-mentioned vibration mode 1 and 2 two kinds of vibration modes of vibration mode at first.
Because therefore the scope that can exist according to characteristic (for example shape, composition, support method etc.) the prediction resonance frequency of glass should apply the vibration detection resonance point to glass plate in this scope.Otherwise, spend the time of Duoing than the detection required time of action.And,, might detect the resonance frequency in the vibration mode high order resonance mode of wanting in addition if do not predict detection range.
Therefore in this example, the necessary parameter of in advance detection of resonance frequency being moved is stored among the EEPROM29 with a plurality of zones of representing with the memory location distribution diagram among Fig. 9, and " with vibration mode 1 corresponding Control Parameter " for example arranged.In store with the occurrence of vibration mode 1 corresponding Control Parameter with the value that is illustrated among Figure 10 (a).For example, StartOffset represents the starting position of reading of this table.
And similarly, with the occurrence of vibration mode 1 corresponding Control Parameter with the in store conduct of the illustrative value of Figure 11 (a) " with vibration mode 1 corresponding frequency compensation table ".Such tables of data is set in N and advances value in the counter 41 when representing to drive glass with vibration mode 1.This table is calculated as the pulse signal of clock pulse generator 55 output frequencies 40 (MHz).Can enough (1 formulas) that had illustrated calculate for example driving frequency.
StopOffset represents to read with this vibration mode 1 corresponding frequency compensation table the position of end of a period.Change driving frequency if arrive the scope of StopOffset at StartOffset, glass plate vibrates with vibration mode 1 with any one value in the table.
StepTime represents use the time of 1 frequency drives when changing driving frequency.Consider decision stabilization time of dustproof glass drive circuit 40.Even the change driving frequency, the vibration of glass plate is also not necessarily followed immediately.If it is not do not follow, consistent with the output of supervisory signal yet.
ADwait is the parameter of the frequency of decision A/D conversion supervisory signal, according to the suitable value of resonance frequency decision of glass.M1OscTime represents to add with detected frequency the time of the dustproof glass 30 that shakes.This is essential in " dedusting action " subprogram.
It more than is the Control Parameter in the vibration mode 1.
Be shown among Figure 10 (b) with the details of vibration mode 2 corresponding Control Parameter.And, be shown among Figure 11 (b) with the details of vibration mode 2 corresponding frequency compensation tables, for the parameter of vibration mode 1 with spline structure because basic identical, therefore omit its explanation.
Below again according to the flow chart of Fig. 5 and the process of Fig. 9～Figure 12 explanation " resonance point detects action ".
In #100, read 4 Control Parameter (StartOffset, StopOffset, StepTime, ADwait) from EEPROM29.
In #101, set the read start address of AddressM1+StartOffset then, set AddressM1+StopOffset as reading the end of a period address as EEPROM29.AddressM1 represents the top address with vibration mode 1 corresponding frequency compensation table.
If suppose to read starting position (StartOffset) for " 3 ", read ultimate position (StopOffset) and be " 9 ", then will be with among Figure 11 (a)
*1 to
*The preset value " N " in the zone of 2 expressions is set and is advanced counter 41 to N.That is, from f1, f2, f3 ..., f7 frequency in detect the frequency of supervisory signal when being output as maximum.
In #102, will set to memory D_ADMAX as the #0 of the minimum value of supervisory signal in order to ensure interim maximum of preserving supervisory signal.
In #103, carry out the warming-up exercise of drive pressure electric device 31.The P_PwCont of control IO port places the ON state with transistor Q00.And make clock pulse generator 55 beginning output pulse signals.If the data setting that will obtain from table under this state advances in the counter 41 to N, then can be with the frequency drives piezoelectric element 31 of hope.
In #104, read preset value (N) from the address of the EEPROM29 that sets.The preset value that to read from the D_NCnt of IO port is set to N and advances the counter 41 then.
Regular hour till standby is stablized to the frequency drives circuit in #105 then.
In #106, Steptime is set time started counting action to time counter 1.If preserve for example Steptime shown in Figure 10 (a), then 2 (msec) are set to time counter 1.
In #107,, #0 is set to storage area D_ADSUM in order to ensure interim additional calculation data of preserving A/D converter 60.And number is returned in the action in order to ensure counting A/D converter 60, and #0 is set to memory D_ADcount.
In #108, ADwait is set to time counter 2, begin the counting action.If preserved for example ADwait shown in Figure 10 (a), then 80 (μ sec) are set to time counter 2.
Then, in #109, obtain the A/D transformed value of supervisory signal with A/D converter 60.
In #110, the A/D transformed value of supervisory signal is added on the memory area D_ADSUM.Incremental calculation storage area D_ADcount (add 1 calculate) again.Standby is over to the counting action of time counter 2 in #111.
Whether the counting action of judging time counter 1 in #112 is over.If also do not had, then, shift to above-mentioned #108 in order to measure supervisory signal once more.If be over then shift to #113.
In #113, obtain the mean value of AD conversion according to storage area D_ADSUM and D_Adcount.And mean value is saved among the storage area D_ADAVE of the record of guaranteeing this mean value.D_ADAVE represents the level of the supervisory signal in the present driving frequency.
In #114, compare the content of D_ADAVE and the content of D_ADMAX.If the content of D_ADAVE is bigger than the content of D_ADMAX, then shift to #115, hour shift to #119.
In #115, the content of D_ADAVE is moved on among the D_ADMAX.And, nullify original maximum, current measured value is preserved as the maximum of supervisory signal.And, measuring in the supervisory signal with vibration mode 1, then shifting to #117 from #116 if be now.And if be to measure in the supervisory signals now with vibration mode 2, then shift to #118 from #116.
In #117, the address of present EEPROM29 is kept among the D_M1resonant.D_M1resonant is in order to ensure the zone on the memory of the address of preserving vibration mode 1 usefulness.
In #118, the address of present EEPROM is kept among the D_M2resonant.D_M2resonant is in order to ensure the zone on the memory of the address of preserving vibration mode 2 usefulness.
The value of these D_M1resonant and D_M2resonant is used in " dedusting action " described later subprogram.
In #119, judge whether the mensuration of reading the supervisory signal of the driving frequency of representing the end of a period address with EEPROM is over.If also do not had then shifted to #121, if be over then shift to thereafter #120.
In #120, stop the processing of drive actions.Make transistor Q00 be in OFF, stop the action of clock pulse generator.
In #121, add 1 address of reading of calculating EEPROM29, shift to #104.
In #122, judge whether the detection action of resonance point in vibration mode 1 and the vibration mode 2 is over.If the detection action all is over then returns main program.
If have only vibration mode 1 to be over, then shift to #130 for the resonance frequency that detects in the vibration mode 2.And because the action of #130, #131 is basic identical with the #100, the #101 that have illustrated, so its explanation is omitted.And, shift to above-mentioned #102 once more in order to detect resonance frequency.
And this subprogram is read preset value from the frequency compensation table in the scope with 2 parameters (StartOffset, StopOffset) regulation.Utilize all these preset values to drive glass plate then, measure the level of supervisory signal.
Figure 12 represents the relationship of amplitude of frequency and glass plate.And, suppose
*The characteristic of 3 expression resonance modes 1.
This routine be determined at the illustrative f1 of Figure 11 (a), f2, f3 ..., the level of supervisory signal in the such frequency (preset value) of f7.
*Resonance frequency in 3 the characteristic is fc.Fc is equivalent to f4.This routine f1, f2, f3, f4 on one side changes the mensuration that driving frequency is carried out supervisory signal on one side so successively.And, also continue to drive according to f5, f6, the such order of f7 even surpass resonance frequency fc.
F1～f4 is the direction that supervisory signal increases.And, begin supervisory signal from f5 and change to reducing direction.Therefore, change to reducing direction by increasing direction, then needn't use frequency f 6, f7 to drive if detect this supervisory signal.And, when frequency range is wide, in order to shorten the detection time of resonance frequency, preferably making as illustrative control program here.
Here, " dedusting action " subprogram shown in Figure 6 is described.
This subprogram is set like this: make dustproof glass 30 resonance drive pressure electric device 31 like that with above-mentioned vibration mode 1 and 2 two patterns of vibration mode.Usually, according to the characteristic (for example weight, shape, material etc.) of dust, easy frequency or the amplitude difference that dust is removed.Therefore, preferably make its glass plate resonance in order positively to remove dust with these two vibration modes.Certainly, also can make its resonance with more vibration mode.But,, therefore should take into full account the degree and the suitable number of needed time set of dust removing effects owing to have dedusting action spended time or also will spend more time taking situation than this.
Therefore, at first in #200 according to EEPROM29 read M1OSCtime with vibration mode 1 corresponding Control Parameter, according to reading M2OSCtime with vibration mode 2 corresponding Control Parameter.
In #201, carry out the warming-up exercise of drive pressure electric device 31.The P_PwCont of control IO port makes transistor Q00 be in the ON state.And, clock pulse generator 55 beginning output pulse signals.If the data setting that will obtain from the table of EEPROM29 advances counter 41 to N in this state, then can be with desirable frequency drives piezoelectric element 31.
In #202, from the address of the EEPROM29 of D_M1resonant indication, read preset value (N).This value is set to N advances counter 41.Dustproof glass drive circuit 40 drives its glass plate with the resonance frequency of vibration mode 1 thus.
In #203, M1OscTime is set to time counter 1, begin the counting action.For example, if the M1OscTime of preservation shown in Figure 10 (a), then 200 (msec) are set to time counter 1.
In #204, standby always is over to the counting action of time counter 1.
By above-mentioned steps, the dedusting of vibration mode 1 action is over.Then, in order positively to carry out dedusting, with vibration mode 2 vibration glass plates.
In #205, from the address of the EEPROM29 of D_M2resonant indication, read preset value (N).This value is set to N advances counter 41.Dustproof glass drive circuit 40 drives its glass plate with the resonance frequency of vibration mode 2 thus.
In #206, M2OscTime is set to time counter 2, begin the counting action.For example, if the M2OscTime of preservation shown in Figure 10 (b), then 100 (msec) are set to time counter 2.
In #207, standby always is over to the counting action of time counter 2.
In #208, stop the processing of drive actions then.Make transistor Q00 be in the OFF state, stop the action of clock pulse generator 55.
After this, return main program.
In addition, in the design phase of camera chain, the distribution of the resonance frequency of prediction glass plate is very difficult.Therefore, after this camera chain is finished, the Control Parameter of the driving frequency of decision piezoelectric element 31 can be set.Therefore aforesaid necessary parameter of the present invention can both selectively be stored among the EEPROM29.
And this " dedusting action " subprogram only adopts with above-mentioned " resonance point detects action " detected resonance frequency of subprogram carries out the driving of glass plate.
Figure 12 represents the relationship of amplitude of frequency and glass plate.Characteristic when supposing to carry out " resonance point detects action " subprogram is
*3.Resonance frequency fc is for being equivalent to the frequency of the f4 among Figure 11 (a).But, owing to do not predict this main cause of resonance frequency, characteristic also just like
*4,
*5 possibilities that change like that.Even also can be corresponding, preferably from the table of EEPROM29, except that f4, also read the data of f3, f5 and carry out this subprogram in order to produce such change.
And, because variations in temperature, resonance frequency is change within the specific limits also, therefore the temperature compensation table that can make by the certain experiment of set basis suitably, and can preserve with reference to ground, drive its glass plate with only resonance frequency in the temperature when it uses.Therefore, for from the corresponding temperature compensation table of vibration mode read and at that time temperature corresponding parameter, can be before this subprogram be carried out with temperature sensor (not illustrating among the figure) the detected temperatures information (t) of temperature measuring circuit 33.
In this wise, if adopt the electronic image pickup device (for example video camera) of the band dust reduction capability of this example, owing to be to load and unload lens unit 10 and recording medium 27, accessories apparatus such as external power source 70 or electronic flash unit 80, having the component parts (dustproof glass 30) that is configured between pick-up lens 1 and the CCD unit 22 and planting frequency with plural number makes this glass vibration remove the dust cleaning apparatus (piezoelectric element 31 and dustproof glass drive circuit 40) of the dust of attachment removal, therefore, any one installation in can corresponding above-mentioned accessories apparatus is effectively removing dust with the resonance action that piezoelectric element 31 produces opportunity.
In the special dust reduction capability here, have for the resonance frequency that detects optical element (dustproof glass 30) and drive the resonance frequency detecting pattern that adds vibrating device (piezoelectric element 31), with in order to remove the dedusting pattern of drive pressure electric device 31 attached to the dust on the above-mentioned optical element, when accessories apparatus has been installed, carry out above-mentioned resonance frequency detecting pattern and above-mentioned dedusting pattern basically continuously.And, be not subjected in order to photograph at once because of detecting the influence of the time lag that the needed time of resonance frequency causes, the detection action of before will photographing, omitting resonance frequency.Therefore, cause bad influence opportunity can be neither for photography, again can be effectively and positively remove dust.
(variation)
Though the example of cover glass (dustproof glass) has been described as an example of electronic image pickup device with camera chain above; even but in abstaining from other electronic image pickup device of dust; perhaps component parts beyond the dustproof glass or other position; if use the present invention equally, also can obtain and the equal effect of above-mentioned example.
And, can also use glass optical element in addition that can not determine resonance frequency, in this case, do not need to adjust because the eigentone that the dispersion of each goods causes can be expected and above-mentioned equal effect yet.
In addition, can do various distortion in the scope that does not break away from essence of the present invention implements.
Claims (5)
1. an electronic image pickup device can load and unload pick-up lens, it is characterized in that possessing:
Image unit is transformed to the signal of telecommunication by above-mentioned pick-up lens with the optical image of subject;
Optical element is set at the front of above-mentioned image unit;
Add the unit that shakes, have the piezoelectric element that is fixed in above-mentioned optical element, make above-mentioned optical element produce vibration wave by making this piezoelectric element;
Driving control unit is supplied with the frequency signal that is used to drive above-mentioned piezoelectric element to the above-mentioned unit that shakes that adds,
Above-mentioned driving control unit by with the communicating by letter of the circuit that is set at above-mentioned pick-up lens, detect the installation of above-mentioned pick-up lens, then supply with the said frequencies signal if detect the installation of above-mentioned pick-up lens to the above-mentioned unit that shakes that adds.
2. electronic image pickup device according to claim 1 is characterized in that,
Above-mentioned driving control unit is being carried out after resonance point for the resonance frequency that detects above-mentioned optical element detects action, utilizes the resonance frequency that detects motion detection by above-mentioned resonance point to drive the above-mentioned unit that shakes that adds.
3. electronic image pickup device according to claim 1 is characterized in that,
Above-mentioned optical element is transparent glass.
4. electronic image pickup device according to claim 3 is characterized in that,
With above-mentioned glass as a shell face, that surround with frame in one taken in above-mentioned image unit and above-mentioned piezoelectric element.
5. electronic image pickup device according to claim 1 is characterized in that,
Has the transducer that is connected, is used to measure the image unit peripheral temperature with the temperature measuring circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002142703A JP3917893B2 (en) | 2002-05-17 | 2002-05-17 | Electronic imaging device |
| JP142703/2002 | 2002-05-17 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031362036A Division CN1303809C (en) | 2002-05-17 | 2003-05-16 | Electronic camera device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101202835A CN101202835A (en) | 2008-06-18 |
| CN101202835B true CN101202835B (en) | 2010-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031362036A Expired - Fee Related CN1303809C (en) | 2002-05-17 | 2003-05-16 | Electronic camera device |
| CNB2007100020734A Expired - Fee Related CN100527786C (en) | 2002-05-17 | 2003-05-16 | Electronic imaging apparatus |
| CN2007100020749A Expired - Fee Related CN101202835B (en) | 2002-05-17 | 2003-05-16 | Electronic imaging apparatus |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031362036A Expired - Fee Related CN1303809C (en) | 2002-05-17 | 2003-05-16 | Electronic camera device |
| CNB2007100020734A Expired - Fee Related CN100527786C (en) | 2002-05-17 | 2003-05-16 | Electronic imaging apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3917893B2 (en) |
| CN (3) | CN1303809C (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060152817A1 (en) * | 2005-01-12 | 2006-07-13 | Goro Noto | Optical device |
| JP4756950B2 (en) * | 2005-08-08 | 2011-08-24 | キヤノン株式会社 | Imaging apparatus and control method thereof |
| JP2007189401A (en) * | 2006-01-12 | 2007-07-26 | Sony Corp | Imaging apparatus |
| JP4702954B2 (en) | 2006-03-09 | 2011-06-15 | キヤノン株式会社 | Imaging device |
| JP4280760B2 (en) | 2006-07-31 | 2009-06-17 | キヤノン株式会社 | Imaging device |
| JP4810348B2 (en) | 2006-08-09 | 2011-11-09 | キヤノン株式会社 | IMAGING DEVICE, IMAGING DEVICE CONTROL METHOD, AND CONTROL PROGRAM |
| JP4597185B2 (en) * | 2007-02-02 | 2010-12-15 | キヤノン株式会社 | Dust removing device and driving method of dust removing device |
| JP4811359B2 (en) * | 2007-06-14 | 2011-11-09 | ソニー株式会社 | Imaging device |
| JP4926855B2 (en) | 2007-06-28 | 2012-05-09 | キヤノン株式会社 | Optical device |
| JP4871802B2 (en) | 2007-07-09 | 2012-02-08 | キヤノン株式会社 | Driving device and imaging device |
| JP5693309B2 (en) * | 2011-03-17 | 2015-04-01 | キヤノン株式会社 | Foreign matter removing apparatus and optical apparatus including the same |
| JP2015031911A (en) * | 2013-08-06 | 2015-02-16 | ソニー株式会社 | Electronic device |
| CN112196812B (en) * | 2015-05-20 | 2022-06-07 | 菲舍尔和佩克尔应用有限公司 | Fan or pump arrangement and method of operation |
| CN108474998B (en) | 2016-03-03 | 2020-10-30 | 株式会社村田制作所 | Vibration device, driving method thereof, and camera |
| WO2018014151A1 (en) * | 2016-07-18 | 2018-01-25 | 博立多媒体控股有限公司 | Self-cleaning sunlight receiving device |
| JP6286732B1 (en) * | 2016-09-08 | 2018-03-07 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ | Imaging system, moving object, method and program |
| JP6265577B1 (en) | 2016-09-08 | 2018-01-24 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ | IMAGING DEVICE, IMAGING SYSTEM, MOBILE BODY, METHOD, AND PROGRAM |
| CN113273169B (en) * | 2019-04-26 | 2023-06-06 | 株式会社村田制作所 | Cleaning device, imaging unit provided with cleaning device, and cleaning method |
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|---|---|---|---|---|
| US4387973A (en) * | 1981-04-30 | 1983-06-14 | The Foxboro Company | Apparatus for maintaining clean optical surfaces in process environments |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0879633A (en) * | 1994-09-01 | 1996-03-22 | Fuji Photo Film Co Ltd | Photographing device |
| JPH07151946A (en) * | 1994-09-12 | 1995-06-16 | Olympus Optical Co Ltd | Camera |
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2002
- 2002-05-17 JP JP2002142703A patent/JP3917893B2/en not_active Expired - Fee Related
-
2003
- 2003-05-16 CN CNB031362036A patent/CN1303809C/en not_active Expired - Fee Related
- 2003-05-16 CN CNB2007100020734A patent/CN100527786C/en not_active Expired - Fee Related
- 2003-05-16 CN CN2007100020749A patent/CN101202835B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4387973A (en) * | 1981-04-30 | 1983-06-14 | The Foxboro Company | Apparatus for maintaining clean optical surfaces in process environments |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2000-29132A 2000.01.28 |
| JP特开平7-151946A 1995.06.16 |
| JP特开平8-79633A 1996.03.22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3917893B2 (en) | 2007-05-23 |
| JP2003330082A (en) | 2003-11-19 |
| CN1462145A (en) | 2003-12-17 |
| CN101202835A (en) | 2008-06-18 |
| CN1984253A (en) | 2007-06-20 |
| CN1303809C (en) | 2007-03-07 |
| CN100527786C (en) | 2009-08-12 |
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