WO1997035744A1 - Dual lamp fixture with integral control - Google Patents
Dual lamp fixture with integral control Download PDFInfo
- Publication number
- WO1997035744A1 WO1997035744A1 PCT/US1997/005017 US9705017W WO9735744A1 WO 1997035744 A1 WO1997035744 A1 WO 1997035744A1 US 9705017 W US9705017 W US 9705017W WO 9735744 A1 WO9735744 A1 WO 9735744A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lamp
- dual
- lamp fixture
- fixture
- dual lamp
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
Definitions
- the present invention is directed generally toward vehicle lights and more particularly toward a vehicle light having incandescent and strobe light sources which utilize a common reflector and lens assembly and which incorporates a high voltage power source for the strobe.
- Light sources are widely used as visually perceptible signaling devices. Common examples are the braking and turning lights of vehicles, running lights on boats, snowmobiles or aircraft, emergency lights of police vehicles and ambulances, and lights employed by school buses for caution signals and stop lights. In all such uses, it is important that the light source have high visibility, such that a driver or other observer will notice the signal. On the other hand, a light source used as a signal should not be so attention-getting that it is overly distracting or otherwise impair the vision of those who see it.
- the most common light signaling sources used on vehicles are incandescent lights. Differing colors and brightness' are generally employed to enhance visibility and to indicate certain kinds of signaling. For example, red is used to indicate the rear of an auto, whereas bright red indicates a braking auto.
- White lights on the rear of an auto are indicative of an auto that has been placed in reverse and yellow lights are used for parking lamps and turn signals.
- Some light sources are turned on when the signal is desired and turned off when it is no longer desired, such as the backing lights on an auto.
- Others light sources are turned on and offwith a given frequency such as turn signal lights. Still others change from a base level of light intensity to a somewhat higher intensity as the message to be signaled changes, such as brake lights.
- Emergency vehicles such as ambulances and police vehicles, typically employ pulsing, high intensity, stroboscopic type lights to command attention. Similar high intensity lights are also used on aircraft or on high buildings. These lights can be quite effective as warning devices, but their brightness at close range can be so intense as to distract or to discomfort the observer.
- a synchronized pulse-enhanced dual light source is disclosed in U.S.
- Patent No. 4,958,143 to Robert J. Knauff The disclosure teaches the combination of incandescent and strobe lamp within a single lighthead.
- the lighthead includes control and power circuitry which accepts an external trigger signal.
- the control circuitry receives the trigger signal and proceeds to control the synchronization of the incandescent pulses with the strobe pulses.
- the controller pulses the strobe before the incandescent lamp achieves any substantial percentage of light output and in such close time proximity to the peak intensity of the incandescent lamp that persistence of vision in the human eye causes the two light sources to blend together visually.
- the timing and synchronization of the two light sources is not independently controllable from an external control system.
- the present invention provides for external control and synchronization of the lamps within the lighthead.
- An external control may be provided which has independent control over the incandescent and strobe lamps. For example, an external control may flash incandescent lamps only, strobe lamps only or both.
- Previous dual lamp fixture have generally had limited light output due to the placement of the incandescent and strobe lamps which has tended to block each other's emissions to a common reflector and through the lighthead lens.
- dual source lightheads which were designed to avoid this problem, have used dual reflectors and lenses for separated incandescent and strobe lamps.
- dual reflector designs have been limited to use in larger lightheads. Since exterior space may be limited on a vehicle, such limitations may prevent the use of such a dual reflector design.
- the present invention avoids this problem by utilizing a standard incandescent lamp in combination with a toroidal strobe lamp. Each lamp of the present invention has direct access to the reflector and lens. Therefore, the light emitted from either lamp is not blocked by the other. Also, the present invention allows the use of a single reflector and lens assembly and thus permits a more compact package design. Since the improved dual lamp fixture of the present invention is not subject to the space limitations of previous designs, it may be installed in previously unavailable locations.
- the present invention enables one to avoid the transmission of high voltages throughout a vehicle's wiring harness by locating strobe power supplies within the housing of each strobe lighthead.
- a central control module associated with the present invention provides for the triggering of the strobes but would not produce the high voltages which are required to operate strobe lamps. Rather, the power supply at the lighthead produces the necessary strobe voltage.
- the present invention eliminates the need for high voltage lines and avoids the problems inherent with such lines.
- a simple micro-controller may be used to interface to the driver's compartment in a vehicle and broadcast general function commands upon specific input selections.
- the dual lamp fixtures can receive this data and act upon it in a manner indicative of the function command and a group address assigned to the lamp fixture.
- the present invention may be adapted for use in lightheads with multiple reflectors or lenses with the possibility of multiple color output.
- the present invention may be utilized in a dual reflector/lens lighthead.
- the lighthead may have two sets of incandescent and strobe lamps, one set for each reflector.
- Such dual reflector/lens designs would permit two different colors to be used in the same lighthead.
- FIG. 1 is a perspective exploded view of one embodiment of a lamp fixture assembly of the present invention
- FIG. 2 is a front elevation view of one embodiment of the lamp fixture assembly of the present invention without the lens;
- FIG. 3 is a cross- sectional plan view of one embodiment of the lamp fixture assembly of the present invention.
- FIG. 4 is a block diagram of the electrical circuit of the present invention.
- FIG. 5 is a schematic diagram of one embodiment of the present invention depicting the power supply and control circuit.
- one embodiment of the dual lamp fixture 10 is shown to have locally contained power supply/control circuitry mounted on a common printed circuit (p.c.) board 12 of such dimensions as to fit in standardized light fixture openings (not shown) utilized in some vehicle manufacture.
- the fixture 10 may be easily retrofitted into a great number of existing applications.
- Circuit assembly 12 may be installed internal to housing 14 with reflector 16 affixed to the housing 14 intermediate said circuit assembly 12 and lens 18.
- the strobe tube 20 and the incandescent bulb 22 may be installed to sockets, as at 24, mounted to the circuit assembly 12 through an opening 26 in the reflector 16.
- the reflector 16 is secured to housing 14 when assembled fixture 10 is mounted to the vehicle body (not shown) using fasteners, such as mounting screws 28.
- a gasket 30 is employed intermediate housing 14 and the vehicle body to form a weather seal.
- the lens 18 may be attached to housing 14 using fasteners, such as screws 32, with an intermediate gasket 34, once again being provided for effecting a weather seal.
- secondary optical and color filter lenses may be employed between reflector 16 and lens 18 to diversify the functionality and intended use of the dual lamp fixture 10.
- a high intensity lamp such as a toroidal strobe tube 20
- a lower intensity lamp 22 such as a halogen or other incandescent lamp
- the mirrored surface 17 of reflector 16 receives a portion of the flux emitted therefrom and directs that light energy through lens 18 where it may be visually perceived.
- FIG. 4 an embodiment of the lamp control circuitry 52 of the present invention is generally represented in block diagrammatic form.
- the lamp control circuit 52 is preferably mounted on p.c. board assembly, as at 12, and within lamp fixture 10, however, it must be appreciated that the p.c. board assembly 12 could be mounted externally, yet in proximity, to lamp fixture 10, without substantially detracting from the utility of the invention.
- FIG. 5 for a detailed description of the functioning of control circuitry 52.
- the lamp control circuit 52 of the present invention includes inputs for the vehicle DC power, typically +12Vdc 100 and ground, and a differential twisted-pair data line 42 for communication with an external control circuit, such as at 43.
- the circuit 52 is provided with a power and radio frequency interference (RFI) filter network, shown generally at 36, to produce conditioned power to the power supply 56 and regulator circuit 38.
- Filter 36 also reduces the amount of noise generated by the power supply circuit 56 that is sent back through the vehicle power bus.
- RFID radio frequency interference
- controller 44 such as may be supplied as a micro-controller or a microprocessor, which is in communication with the high voltage lamp supply 56 and trigger circuit 54, low intensity lamp switch means 50, as well as an external control circuit 43.
- controller 44 awaits a command signal from an external source, such as external control circuit 43. Once a valid command is received by the controller 44 from external control circuit 43, it actuates specific elements of the power supply 56, trigger circuit 54 and switch 50 to generate a predefined flash pattern corresponding to the specific command received and which relates to the function- specific class of lamp fixture.
- a plurality of dual lamp fixtures will be employed in an overall vehicle lighting system, each having its own function specific identity established by setting address means 46 and being controlled, overall, by external control circuit 43.
- dual lamp fixture circuitry 52 and external controller 43 are shown as functional block form with the direction of logic flows being indicated by arrows.
- Program instructions stored within controller 44 and external controller 43 allows the lamp fixture 10 to interpret its physical address, set by address switches 46, as being specific or generic. If group (more than one lamp fixture) addressing is desired, lamp fixture 10 will receive each interpretable command from the external control circuit 43 and respond to it in accordance with the lamp fixture's group address. In an embodiment of the invention in which the fixtures are components in a distributed network, the commands issued by the external controller are address-specific, therefore the lamp fixtures will only receive and respond to commands which include the predetermined address (set by switches 46) of lamp fixture 10.
- Operation of the high voltage power supply 56 is initiated when controller 44 issues a logic low to the base of NPN transistor 60 via converter enable output, designated as CE, which allows the reset pin of oscillator 62 to be pulled high, thus allowing the oscillator to run.
- controller 44 issues a logic high to disable oscillator 62 by pulling reset pin low via the NPN transistor 60.
- High voltage which in the preferred embodiment is around 330Vdc, is created through the secondary winding of high voltage (h.v.) transformer 64 when field effect transistor (FET) 66 is used, alternately, either to permit or to interrupt the current flow from the conditioned supply line 68.
- FET field effect transistor
- the collapsing electromagnetic field induces a current (the "flyback effect") in its secondary winding which is at a voltage level proportional to its winding ratio.
- the voltage produced through the secondary winding is rectified by rectifying diode 70 and gradually charges a capacitor 72.
- Resistor 74 is placed in parallel with capacitor 72 to slowly drain the capacitor should it not be discharged after being initialized.
- the current through the primary of h.v. transformer 64 is interrupted at a frequency controlled by oscillator 62 which drives the gate of the FET 66.
- the current through the primary is limited by comparing the voltage level at current limiting test point designated CL, to a reference voltage taken from reference test point, designated CL', which is created by a voltage divider network. If the current limit is reached, i.e., CL exceeds the value of CL', comparator 76 detects the error and pulls the reset pin of oscillator 62 low, thus disabling its output and shutting down h.v. converter 56. Once the current limit error condition is no longer present, the comparator 76 releases the oscillator 62 and h.v. converter 56 restarts.
- the high voltage is limited by comparing voltage limit test point, designated VL, in the circuit, which is proportional to the high voltage level, to a reference voltage level, designated VL'.
- Comparator 76 is also used to monitor these levels and hold oscillator 62 reset pin to ground in the presence of an error condition, that is when VL exceeds the value of VL'.
- the controller 44 also monitors the voltage at VL to determine if h.v. converter 56 is working properly. If VL fails to reach a predetermined voltage level shortly after CE is pulled low (enabling the converter), controller 44 will determine a h.v. converter error and load its status registers with that error so that it may be subsequently transmitted to an external control circuit when polled.
- a strobe trigger enable signal designated as TE
- TE silicon controlled rectifier
- capacitor 88 is provided to insure that capacitor 86 will quickly recharge after each trigger pulse.
- Diode 92 is provided in order to prevent capacitor 88 from being discharged through strobe tube 20.
- incandescent lamp 22 is connected to a switch, such as N-Channel FET 94, and to DC power source 100.
- a switch such as N-Channel FET 94
- LE lamp enable signal
- Lamp failure resistor 102 allows the detection of the failure of lamp 22 by maintaining the voltage at test point 104 "high” when the filament is intact and the FET 94 is “OFF.” If the voltage test point 104 drops “low” and the FET 94 is off, then there is an open circuit which generally indicates a broken filament within lamp 22.
- the controller 44 monitors the lamp status voltage at test point 104, designated as LS, and sets an appropriate status register so that the functional condition of the low intensity lamp 22 may be provided to external controller 43 when it is requested.
- the controller 44 within dual lamp fixture 10 is typically in communication with, accepts commands from and issues circuit status information to an external controller 43.
- External controller 43 may be a simple micro-controller, having a limited number of instruction sets or a more versatile microprocessor which interfaces with the driver's compartment in a vehicle, such as an ambulance or other emergency vehicle.
- external controller 43 broadcasts corresponding commands on a data bus 42 which are picked up by the appropriate internal controllers, as at 44, and acted upon in a predetermined manner as dictated by the group address assigned to that particular lamp fixture 10 via switch 46.
- an ambulance utilizes a series of warning lights which are divided into three distinct groups. Each group must flash synchronously with one another with a predetermined phase shift, or delay, between the other groups of lamps. Also, the intensity and operation of these groups varies depending upon the system function.
- the following table illustrates the broadcast function originated by the external controller 43 and the group addressing which is evaluated by the controller 44 in each of the dual lamp fixtures 10.
- One embodiment of the invention provides for 16 distinct group addresses.
- the dual lamp fixture 10 system also operates as a sub-net of a distributed-network vehicle control system. In such applications, the addressing off the lamp fixtures 10 via switch 46, becomes specific rather than being assigned a group address as discussed above.
- the microprocessor (not shown) in the distributed control network is in direct communication with the lamp fixture(s) 10 and provides lamp fixture-specific instructions as to what function that lamp is to perform and when to perform that function. While the present dual lamp fixture 10 supports 16 individual addresses, when the fixtures are used as components in sub-networks it should be appreciated that it is possible to have a great number of lamp fixtures synchronously performing even a greater variety of flash patterns
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97917059A EP0889803A1 (en) | 1996-03-28 | 1997-03-27 | Dual lamp fixture with integral control |
AU25511/97A AU2551197A (en) | 1996-03-28 | 1997-03-27 | Dual lamp fixture with integral control |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US62325096A | 1996-03-28 | 1996-03-28 | |
US08/623,250 | 1996-03-28 | ||
US08/826,005 | 1997-03-27 | ||
US08/826,005 US5785413A (en) | 1996-03-28 | 1997-03-27 | Dual lamp fixture with integral control |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997035744A1 true WO1997035744A1 (en) | 1997-10-02 |
Family
ID=27089408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1997/005017 WO1997035744A1 (en) | 1996-03-28 | 1997-03-27 | Dual lamp fixture with integral control |
Country Status (6)
Country | Link |
---|---|
US (1) | US5785413A (en) |
EP (1) | EP0889803A1 (en) |
CN (1) | CN1214655A (en) |
AU (1) | AU2551197A (en) |
CA (1) | CA2250392A1 (en) |
WO (1) | WO1997035744A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2344945A (en) * | 1998-12-17 | 2000-06-21 | Papacy Products Co Ltd | Auxiliary safety warning lamp system for a vehicle |
US6326888B1 (en) | 1998-12-17 | 2001-12-04 | Ching-Yung Wang | Auxiliary safety warning light system for a vehicle |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6155694A (en) * | 1998-04-16 | 2000-12-05 | Whelen Engineering Company, Inc. | Composite warning light with emission pattern matching |
US6037679A (en) * | 1998-11-30 | 2000-03-14 | Pirillo; Paul M. | Yard decorations for low voltage table |
US6315435B1 (en) | 1999-02-18 | 2001-11-13 | Alliedsignal Inc. | Electronically controlled searchlight having multiple preset positions |
GB2356244B (en) * | 1999-11-13 | 2004-03-17 | Bridisco Ltd | A lighting appliance |
US6696938B2 (en) * | 2001-06-29 | 2004-02-24 | Omega Patents, L.L.C. | Vehicle security system including a strobe light confirmation indicator and related methods |
US6637922B2 (en) * | 2001-10-26 | 2003-10-28 | Demax Enterprise Co., Ltd. | Brightness enhanced head lamp apparatus |
US6819059B2 (en) * | 2002-10-25 | 2004-11-16 | Federal Signal Corporation | Flash strobe power supply system and method |
US20040154075A1 (en) * | 2002-12-30 | 2004-08-12 | Darrian Ferguson | Garment pairing device |
DE10302460A1 (en) * | 2003-01-23 | 2004-08-12 | Bayerische Motoren Werke Ag | Vehicle lamp and method for displaying different signal images of a vehicle lamp |
US7121684B2 (en) * | 2004-06-10 | 2006-10-17 | Genlyte Thomas Group, Llc | Garage light luminaire with circular compact fluorescent emergency lighting optics |
US7268679B2 (en) * | 2004-09-18 | 2007-09-11 | Lear Corporation | Rear lighting system applied to an automotive vehicle |
CN102186290A (en) * | 2011-04-19 | 2011-09-14 | 孟强 | Energy-saving controller for light-emitting diode (LED) road lamp |
USD667987S1 (en) * | 2011-07-20 | 2012-09-25 | Ningbo Yinzhou Self Photoelectron Technology Co., Ltd. | LED lighthead |
USD668378S1 (en) * | 2011-08-22 | 2012-10-02 | Ningbo Yinzhou Self Photoelectron Technology Co., Ltd. | LED reflector |
USD832730S1 (en) * | 2017-03-28 | 2018-11-06 | Juluen Enterprise Co., Ltd. | Lighthead |
Citations (12)
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US3732540A (en) * | 1970-11-16 | 1973-05-08 | R Platte | Emergency warning light switching system |
FR2585449A1 (en) * | 1985-07-24 | 1987-01-30 | Franclair Electronique | Flashing luminous device |
US4734697A (en) * | 1986-07-25 | 1988-03-29 | Robinson Melvis I | Motor vehicle tail light assembly with dimmer controller |
US4734625A (en) * | 1984-10-18 | 1988-03-29 | American Sterilizer Company | Control circuit for system for controlling the operation of electric lights |
US4859988A (en) * | 1988-05-19 | 1989-08-22 | Emergency Technology, Inc. | Automotive vehicle exterior light flashing circuit |
US4930049A (en) * | 1988-12-27 | 1990-05-29 | General Electric Company | Optical multiplexed electrical distribution system particularly suited for vehicles |
US4958143A (en) | 1989-03-01 | 1990-09-18 | Knauff Robert J | Synchronized pulse-enhanced dual light source |
US5015918A (en) * | 1988-07-22 | 1991-05-14 | John Copeland | Bicycle single-wire lighting system with steady-flashing-reflector rear warning device |
US5291299A (en) * | 1991-03-07 | 1994-03-01 | Idman Oy | Power supply and control unit for a light system and a lighting unit for the light system |
US5452188A (en) * | 1992-04-14 | 1995-09-19 | Green; Timothy M. | Modular strobe bar |
US5499009A (en) * | 1994-03-08 | 1996-03-12 | Microflash, Inc. | Light flashing system |
US5608290A (en) * | 1995-01-26 | 1997-03-04 | Dominion Automotive Group, Inc. | LED flashing lantern |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE2654026A1 (en) * | 1976-11-27 | 1978-06-01 | Bosch Gmbh Robert | REMOTE CONTROL SYSTEM FOR THE SELECTIVE DRIVING OF CONSUMERS, IN PARTICULAR IN A MOTOR VEHICLE |
-
1997
- 1997-03-27 EP EP97917059A patent/EP0889803A1/en not_active Withdrawn
- 1997-03-27 CN CN97193423A patent/CN1214655A/en active Pending
- 1997-03-27 WO PCT/US1997/005017 patent/WO1997035744A1/en not_active Application Discontinuation
- 1997-03-27 US US08/826,005 patent/US5785413A/en not_active Expired - Fee Related
- 1997-03-27 CA CA002250392A patent/CA2250392A1/en not_active Abandoned
- 1997-03-27 AU AU25511/97A patent/AU2551197A/en not_active Abandoned
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3732540A (en) * | 1970-11-16 | 1973-05-08 | R Platte | Emergency warning light switching system |
US4734625A (en) * | 1984-10-18 | 1988-03-29 | American Sterilizer Company | Control circuit for system for controlling the operation of electric lights |
FR2585449A1 (en) * | 1985-07-24 | 1987-01-30 | Franclair Electronique | Flashing luminous device |
US4734697A (en) * | 1986-07-25 | 1988-03-29 | Robinson Melvis I | Motor vehicle tail light assembly with dimmer controller |
US4859988A (en) * | 1988-05-19 | 1989-08-22 | Emergency Technology, Inc. | Automotive vehicle exterior light flashing circuit |
US5015918A (en) * | 1988-07-22 | 1991-05-14 | John Copeland | Bicycle single-wire lighting system with steady-flashing-reflector rear warning device |
US4930049A (en) * | 1988-12-27 | 1990-05-29 | General Electric Company | Optical multiplexed electrical distribution system particularly suited for vehicles |
US4958143A (en) | 1989-03-01 | 1990-09-18 | Knauff Robert J | Synchronized pulse-enhanced dual light source |
US5291299A (en) * | 1991-03-07 | 1994-03-01 | Idman Oy | Power supply and control unit for a light system and a lighting unit for the light system |
US5452188A (en) * | 1992-04-14 | 1995-09-19 | Green; Timothy M. | Modular strobe bar |
US5499009A (en) * | 1994-03-08 | 1996-03-12 | Microflash, Inc. | Light flashing system |
US5608290A (en) * | 1995-01-26 | 1997-03-04 | Dominion Automotive Group, Inc. | LED flashing lantern |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2344945A (en) * | 1998-12-17 | 2000-06-21 | Papacy Products Co Ltd | Auxiliary safety warning lamp system for a vehicle |
GB2344945B (en) * | 1998-12-17 | 2001-07-25 | Papacy Products Co Ltd | Auxiliary safety warning lamp system for a vehicle |
US6326888B1 (en) | 1998-12-17 | 2001-12-04 | Ching-Yung Wang | Auxiliary safety warning light system for a vehicle |
Also Published As
Publication number | Publication date |
---|---|
AU2551197A (en) | 1997-10-17 |
US5785413A (en) | 1998-07-28 |
EP0889803A1 (en) | 1999-01-13 |
CA2250392A1 (en) | 1997-10-02 |
CN1214655A (en) | 1999-04-21 |
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