CN1491030A - Tricolour convergent method for matrix pixel device projector scope - Google Patents

Tricolour convergent method for matrix pixel device projector scope Download PDF

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Publication number
CN1491030A
CN1491030A CNA031293131A CN03129313A CN1491030A CN 1491030 A CN1491030 A CN 1491030A CN A031293131 A CNA031293131 A CN A031293131A CN 03129313 A CN03129313 A CN 03129313A CN 1491030 A CN1491030 A CN 1491030A
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China
Prior art keywords
matrix pixel
pixel device
convergence
image
look
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CNA031293131A
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CN1234237C (en
Inventor
旭 刘
刘旭
邱胜根
刘向东
李海峰
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ZHEDA-KETA PHOTOELECTRIC SCIENCE AND TECHNOLOGY CO LTD HANGZHOU
Zhejiang University ZJU
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ZHEDA-KETA PHOTOELECTRIC SCIENCE AND TECHNOLOGY CO LTD HANGZHOU
Zhejiang University ZJU
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Priority to CN 03129313 priority Critical patent/CN1234237C/en
Publication of CN1491030A publication Critical patent/CN1491030A/en
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Abstract

This invention opens a three colors convergence method for projecting display of matrix pixel device. The matrix pixel device produces the picture that is projected into the screen, multi image sensors on the screen according to certain rules are mount, the image sensor collects the image data and sends to computers, after processing the image evaluation function is used to judge whether or not the precision of convergence reaches the requirement, if reaches it, then the convergence ends, and enters the three display chip fast curing exposure process, if don't reach precision of requirement, then synthetize multi sensors data to calculate deviation value, through six degree of freedom precise manipulator control matrix pixel device to move to the required place, above the procedure is repeated until the convergence reaches the precision. In this invention, not only the convergence speed is faster than manual work, also the convergence precision and reliability are improved efficiently, and the automation of three colors convergence is implemented.

Description

Three look convergence methods of the matrix pixel device projection display
Technical field
The present invention relates to a kind of three look convergence methods of the matrix pixel device projection display.
Background technology
The large screen projection display system of matrix pixel device is the main Display Technique of current office, meeting etc.Lcd projection tv, DLP projection and the LCOS projection display etc. are exactly typical case's representative of this technology, it is the main display device of high definition TV of future generation, be the substitute products of present CRT monitor, it has the high-resolution of matrix form pixel device, have radiationless simultaneously, flicker free, advantages such as digitlization.
In these projection display systems, coloured image is that (as liquid crystal board or DMD, LCOS) the turquoise three coloured light roads of difference modulated red synthesize coloured image with three coloured light roads to application three block matrix pixel devices again, are projected to screen, form coloured image.Because each Pixel Dimensions less (generally at the 10-20 micron) of matrix pixel device, therefore red (R), green (G), blue (B) three colour moment battle array pixel devices accurately is converged to producing and the key technology of using these display systems.At present, basically still by manually regulating the convergence of three colour moment battle array pixel devices, so subjectivity is bigger, and time-consuming, effort, and quality is difficult to control.
Summary of the invention
The three look convergence methods that the purpose of this invention is to provide a kind of matrix pixel device projection display.
The matrix pixel device produce image through the optical system projection in screen, on screen, a plurality of imageing sensors are installed according to certain rule, the view data of imageing sensor acquired projections on screen is in computer, data are carried out using evaluation function after the image processing, differentiate the convergence precision and whether reach requirement, if reach required precision, then aggregation procedure finishes, enter the quick curing exposure process of three display chips, if precision does not reach requirement, the data computation amount of deviating of comprehensive a plurality of transducers then, move to satisfactory position by six degree of freedom precision optical machinery hand control matrix pixel device, repeat said process, till the convergence precision reaches requirement.
Not only the speed assembled of three looks artificial is fast in the present invention, and precision and the reliability assembled all obtained effective raising, has realized the automation that three looks are assembled.
Description of drawings
Fig. 1 is three look auto convergence FB(flow block);
Fig. 2 is the fixedly schematic diagram of accurate adjustment rack of space six degree of freedom and pixel device, pixel device a among the figure, six degree of freedom manipulator b;
Fig. 3 is the two kinds of distribution schematic diagrams of five CCD on the screen;
Fig. 4 is the automatic focusing adjustment process schematic diagram of convergence yoke;
Fig. 5 is that automatic three looks of convergence yoke close look process schematic diagram.
Embodiment
The matrix pixel device projection display is the main implementation technique of modern handle official bussiness, family multi-media large-curtain projecting TV set and high definition TV.The coloured image of this class projection display is that (as liquid crystal board LCD or DMD, LCOS) the turquoise three coloured light roads of difference modulated red synthesize coloured image with three coloured light roads to application three block matrix pixel devices again, are projected to screen, form coloured image.Because each Pixel Dimensions of matrix pixel device is less, generally at the 10-20 micron, accurately being converged to of red (R), green (G), blue (B) three colour moment battle array pixel devices is production and the key technology of using these display systems.
Therefore exist three looks that three color pixel displays (as liquid crystal board) must be carried out dimensional orientation to assemble COINCIDENCE PROBLEMS.Because the size of high-resolution each pixel of matrix pixel device only has about the 8-20 micron, it is a very accurate and elaboration that three looks are assembled, comprise the judgement of convergence, the adjustment of three block matrix pixel devices, also have only at present by the human eye interpretation, be a kind of labour-intensive technology fully, and because artificial factor, the production quality stability of matrix pixel device projector is difficult to guarantee, be a production critical process that difficulty is bigger, its efficient height directly influences the productivity ratio of the projection display.
Three look convergence methods of the matrix pixel device projection display that proposes among the present invention, be that a plurality of CCD of a kind of application carry out IMAQ, adopt the high speed image treatment technology, differentiate convergent effect, by the accurate space of computer control three covers six degree of freedom manipulator, adjust the locus of three colour moment battle array pixel devices, the image three-colo(u)r auto convergence of implementation space.Concrete system block diagram as shown in Figure 1.
Three matrix pixel devices of modulating image three-colo(u)r respectively are (as the LCD plate, or LCOS, DMD) fix by three manipulators that independently can carry out space six degree of freedom adjusting respectively, the manipulator of this six-freedom motion can be combined by three accurate translation platforms and three accurate turntables, constitute the mutually orthogonal six degree of freedom spatial movement platform in space, and the minimal adjustment precision of each degree of freedom should reach each Pixel Dimensions of pixel device 1/10 in, guarantee to assemble precision.As shown in Figure 2, be the position relation of the matrix pixel display device of one of image three-colo(u)r matrix pixel display device and six degree of freedom manipulator.
Adopt identical or similarly close coloured light and learn system with the projection display, with three three cover six degree of freedom manipulators of modulating the matrix pixel device of three kinds of color of light respectively and matching with it, constitute a complete optical projection system, and cooperate with projection objective, three looks are imaged in screen through the image projection of three matrix pixel device modulation.On screen, adopt several CCD or cmos image sensor to form the multichannel image transducer and take this system and be projected in image on the screen.There is multiple mode in the row portion of imageing sensor on screen, wherein typical dual mode as shown in Figure 3, promptly adopt five image three-colo(u)rs on the CCD shooting projection screen, each CCD can only reflect the performance of projected image part, and the projected image performance of the overall situation will comprehensively be finished by 5 CCD.CCD should have certain distribution on screen, as visual field, center, visual field, edge, 0.7 visual field etc., make it possible to obtain the image aggregate information at projected picture center and edge.The picture signal in five zones of projected picture of CCD picked-up through image capturing system, enters computer, is converted into digital picture.
In order to carry out Computer Image Processing, judge the differences in spatial location of three color pixel devices, adopted high speed image to handle and recognition technology, weigh the readability of image and the projection orientation of image by the evaluation function of setting up image.The process separated into two parts that three looks are assembled: first is the auto-focus process of trichromat spare, and second portion is that three looks close the look process.The entire system set-up procedure is: the CCD pickup image, enter computer through image pick-up card, be converted into digital picture, digital picture is through filtering, denoising, and image processing method such as edge enhancing, carry out the image algorithm conversion, the image information that detects of a plurality of imageing sensors of COMPREHENSIVE CALCULATING then, calculate evaluation function, the focusing of three looks is differentiated in calculating bias or three looks close the effect of look, if meet the demands, then controls automatic curing machine, the exposure of carrying out pixel display device is solidified, if do not meet the demands,, use multiple optimisation technique then according to bias, differentiate the position of matrix pixel image device of all kinds and the difference of ideal position, the control manipulator carries out the six degree of freedom adjustment, enters next circulation with the CCD pickup image again, as shown in Figure 1.
First is three look focus process, utilize evaluation function on correctly to focal plane, should have some feature (having maximum) such as function, in case find this feature, just utilize control device, regulate a certain device, thereby make the image conjugation, the data of comprehensive different visual field CCD can be the most clear with the projected image resultant effect of matrix pixel device.Basic step as shown in Figure 4.
Second portion is that image three-colo(u)r closes the look process, makes the redgreenblue image projection in screen, utilizes the view data of different azimuth collection to realize that three looks overlap in the plane.Basic step as shown in Figure 5.
The focusing of three looks is closed two processes of look with three looks and can be exchanged order, and the feasible higher convergence precision that reaches also can repeatedly circulate.
Equally, also can adopt and three looks focusings and three looks are closed look concentrate on one simultaneously and regulate the method for carrying out in the feedback procedure, realize that three looks focusing simultaneously closes look with three looks.
Owing to certain aberration that projection lens exists, as the curvature of field, astigmatism, coma, ratio chromatism, etc., the difficulty that therefore actual three looks are assembled is very big, brings bigger difficulty for the judgement to focal plane, result's judgement that three looks close look.The target of this equipment is mainly used in production simultaneously, and it is fast to require to regulate the speed automatically, and therefore amount of calculation can not be too big in Computer Processing, otherwise can have influence on the speed of auto convergence.Characteristic for better reflected appraisal function can adopt multiple algorithm.For three look focus process, the characteristic for better reflected appraisal function can adopt multiple algorithm, as Laplacian, Sobel operator and Prewitt operator etc., to improve the image discriminating precision.Simultaneously, adopt many CCD symmetrical distribution image capture method, utilized the precision and the speed of the raising focusing differentiations such as axial symmetry of projection objective.Close the look process for three looks, can adopt three color bits to put the method for approaching gradually, also can adopt the calculated difference of putting according to image three color bits, between the accurate method that moves three color pixel devices to ideal position.Through repeatedly circulation, feedback manipulator space six degree of freedom adjustable system, the spatial movement of control manipulator realizes the convergence fully that tricolor projection shows.
After three looks are assembled and are finished, computer control uv-exposure system carries out quick uv-exposure, solidifies three dichroic liquid crystal plates, uses the image change on the real-time monitoring screen of multichannel image transducer simultaneously, and then the quick-moving speed feedback of control machinery, the image change of correction exposure process.Such monitoring feedback system has guaranteed the precision and the rate of finished products of uv-exposure, realizes that the quick location of three colour moment battle array pixel devices is solidified.

Claims (9)

1. three look convergence methods of a matrix pixel device projection display, it is characterized in that the matrix pixel device produce image through the optical system projection in screen, on screen, a plurality of imageing sensors are installed according to certain rule, the view data of imageing sensor acquired projections on screen is in computer, data are carried out using evaluation function after the image processing, differentiate the convergence precision and whether reach requirement, if reach required precision, then aggregation procedure finishes, enter the quick curing exposure process of three display chips, if precision does not reach requirement, the data computation amount of deviating of comprehensive a plurality of transducers then, move to satisfactory position by six degree of freedom precision optical machinery hand control matrix pixel device, repeat said process, till the convergence precision reaches requirement.
2. three look convergence methods of a kind of matrix pixel device projection display according to claim 1 is characterized in that said matrix pixel device Projection Display, are meant the Projection Display of LCD, DMD and LCOS matrix pixel device.
3. three look convergence methods of a kind of matrix pixel device projection display according to claim 1, it is characterized in that said three look aggregation procedures, be divided into three looks focusings and three looks and close independently process of two of looks, perhaps focusing of three looks and three looks close the method for form and aspect combination.
4. three look convergence methods of a kind of matrix pixel device projection display according to claim 1 is characterized in that the said imageing sensor that is used for image detection, are meant CCD or cmos image sensor.
5. three look convergence methods of a kind of matrix pixel device projection display according to claim 1, it is characterized in that the said multichannel image transducer that a plurality of imageing sensors formations are installed according to certain rule on screen, be meant according to system requirements screen up and down in different visual fields installation diagram image-position sensor, perhaps the multichannel image transducer of a plurality of imageing sensors of forming of other regular arrangement methods.
6. three look convergence methods of a kind of matrix pixel device projection display according to claim 1, it is characterized in that said image data acquiring with different azimuth uses image smoothing, filtering, sharpening image processing techniques behind computer, use suitable evaluation method to differentiate the definition of focusing then and whether precision that three looks close look reaches requirement.
7. three look convergence methods of a kind of matrix pixel device projection display according to claim 1 is characterized in that said utilization six degree of freedom precision optical machinery hand realization matrix pixel device carries out the precision control of micron or sub-micrometer scale in three translation directions and three look rotation directions.
8. three look convergence methods of a kind of matrix pixel device projection display according to claim 1, it is characterized in that said comprehensive different azimuth imageing sensor view data with and the orientation arrangement mode, according to evaluation function, calculate the departure of matrix pixel device at different directions and ideal position, by six degree of freedom manipulator gating matrix pixel device to correct position, thereby the total space of realization matrix pixel device is regulated.
9. three look convergence methods of a kind of matrix pixel device projection display according to claim 1, the quick curing exposure process that it is characterized in that said three display chips, be meant that using photosensitive adhesive realizes multi-channel parallel uv-exposure ultraviolet illumination system, make the transient state of three display chips solidify, use multichannel image sensing technology monitoring simultaneously, and feedback compensation, control uv-exposure process.
CN 03129313 2003-06-12 2003-06-12 Tricolour convergent method for matrix pixel device projector scope Expired - Fee Related CN1234237C (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103000137A (en) * 2005-12-19 2013-03-27 皮克斯特罗尼克斯公司 Direct-view MEMS display devices and methods for generating images thereon
US9116344B2 (en) 2008-10-27 2015-08-25 Pixtronix, Inc. MEMS anchors
US9128277B2 (en) 2006-02-23 2015-09-08 Pixtronix, Inc. Mechanical light modulators with stressed beams
US9134552B2 (en) 2013-03-13 2015-09-15 Pixtronix, Inc. Display apparatus with narrow gap electrostatic actuators
US9135868B2 (en) 2005-02-23 2015-09-15 Pixtronix, Inc. Direct-view MEMS display devices and methods for generating images thereon
US9158106B2 (en) 2005-02-23 2015-10-13 Pixtronix, Inc. Display methods and apparatus
US9177523B2 (en) 2005-02-23 2015-11-03 Pixtronix, Inc. Circuits for controlling display apparatus
US9229222B2 (en) 2005-02-23 2016-01-05 Pixtronix, Inc. Alignment methods in fluid-filled MEMS displays
US9261694B2 (en) 2005-02-23 2016-02-16 Pixtronix, Inc. Display apparatus and methods for manufacture thereof
US9336732B2 (en) 2005-02-23 2016-05-10 Pixtronix, Inc. Circuits for controlling display apparatus
US9500853B2 (en) 2005-02-23 2016-11-22 Snaptrack, Inc. MEMS-based display apparatus

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9261694B2 (en) 2005-02-23 2016-02-16 Pixtronix, Inc. Display apparatus and methods for manufacture thereof
US9135868B2 (en) 2005-02-23 2015-09-15 Pixtronix, Inc. Direct-view MEMS display devices and methods for generating images thereon
US9158106B2 (en) 2005-02-23 2015-10-13 Pixtronix, Inc. Display methods and apparatus
US9177523B2 (en) 2005-02-23 2015-11-03 Pixtronix, Inc. Circuits for controlling display apparatus
US9229222B2 (en) 2005-02-23 2016-01-05 Pixtronix, Inc. Alignment methods in fluid-filled MEMS displays
US9274333B2 (en) 2005-02-23 2016-03-01 Pixtronix, Inc. Alignment methods in fluid-filled MEMS displays
US9336732B2 (en) 2005-02-23 2016-05-10 Pixtronix, Inc. Circuits for controlling display apparatus
US9500853B2 (en) 2005-02-23 2016-11-22 Snaptrack, Inc. MEMS-based display apparatus
CN103000137A (en) * 2005-12-19 2013-03-27 皮克斯特罗尼克斯公司 Direct-view MEMS display devices and methods for generating images thereon
US9128277B2 (en) 2006-02-23 2015-09-08 Pixtronix, Inc. Mechanical light modulators with stressed beams
US9116344B2 (en) 2008-10-27 2015-08-25 Pixtronix, Inc. MEMS anchors
US9182587B2 (en) 2008-10-27 2015-11-10 Pixtronix, Inc. Manufacturing structure and process for compliant mechanisms
US9134552B2 (en) 2013-03-13 2015-09-15 Pixtronix, Inc. Display apparatus with narrow gap electrostatic actuators

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