CN106324965B - DLP laser projection automatic white balance adjusting apparatus and method - Google Patents
DLP laser projection automatic white balance adjusting apparatus and method Download PDFInfo
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- CN106324965B CN106324965B CN201611007839.3A CN201611007839A CN106324965B CN 106324965 B CN106324965 B CN 106324965B CN 201611007839 A CN201611007839 A CN 201611007839A CN 106324965 B CN106324965 B CN 106324965B
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- mcu module
- white balance
- drive waveforms
- drive
- photoelectric sensor
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/206—Control of light source other than position or intensity
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2053—Intensity control of illuminating light
Abstract
The present invention relates to field of projection display, and it discloses a kind of DLP laser projections automatic white balance adjusting apparatus and methods, solve the problems, such as that white balance offset can occur in use for laser projection in traditional technology.The device includes photoelectric sensor, A/D modular converters, MCU module, LD (laser diode) drive module, image processor, LD drive waveforms editing machines；The photoelectric sensor connects A/D modular converters, and the A/D modular converters connect MCU module；Described image processor connects MCU module；The MCU module connects LD drive waveforms editing machines；The LD drive waveforms editing machine connects LD drive modules.The present invention is suitable for Projection Display.
Description
Technical field
The present invention relates to field of projection display, more particularly to a kind of DLP (digital light processing) laser projection is put down in vain automatically
The adjusting apparatus that weighs and method.
Background technology
DLP laser projection of the laser diode as light source is used at present, generally using blue laser diode, wavelength
Between 400-480nm, by the way that blue laser diode is excitated red, green emitting phosphor generates red green visible ray or excitation
Yellow fluorescent powder, then filter out red visible by filter, the blue light that blue laser diode ejects can be directly as
Blue-light source.Since laser diode is in itself there are attenuation problem (25000 hours service life), there are the service life in itself to ask for fluorescent powder
Topic, the difference of particularly different fluorescent powders attenuation degree at any time, can cause laser projection white in use for some time
Balance will shift.
Invention content
The technical problems to be solved by the invention are：It is proposed a kind of DLP laser projections automatic white balance adjusting apparatus and
Method solves the problems, such as that white balance offset can occur in use for laser projection in traditional technology.
The technical solution adopted by the present invention to solve the technical problems is：
DLP laser projection automatic white balance adjusting apparatus, including：
Photoelectric sensor, A/D modular converters, MCU module, LD (laser diode) drive module, image processor, LD drive
Dynamic Waveform Editor；The photoelectric sensor connects A/D modular converters, and the A/D modular converters connect MCU module；The figure
As processor connects MCU module；The MCU module connects LD drive waveforms editing machines；The LD drive waveforms editing machine connection
LD drive modules.
As advanced optimizing, the photoelectric sensor is all-wave length photoelectric sensor, is arranged on DLP laser projections
Optical wand on or OFF light irradiation positions.
As advanced optimizing, described image processor is for image procossing and informs rising for MCU module picture blanking phase
Begin the time.
As advanced optimizing, the MCU module is used to send out independent test signal, institute when entering the picture blanking phase
It states photoelectric sensor test brightness and after A/D is converted, brightness data is fed back into MCU module；The MCU module is by brightness
Data are compared with predetermined luminance data, are obtained correction value and are sent the LD drive waveforms editing machine to；The LD drivings
Waveform Editor accordingly corrects the waveform that LD drives according to correction value, then controls the LD drive modules adjustment electric current
Watt level.
In addition, another object of the present invention also resides in, a kind of DLP laser projections automatic white balance adjustment method is proposed,
It includes the following steps：
A.MCU modules send out test signal；
B. photoelectric sensor test brightness and after A/D is converted, feeds back to MCU module by brightness data；
Brightness data and predetermined luminance data are compared by c.MCU modules, are obtained correction value and are sent the LD to and drive
Dynamic Waveform Editor；
D.LD drive waveforms editing machine accordingly corrects the waveform that LD drives according to correction value, then controls the LD
Drive module adjusts current power size.
As advanced optimizing, in step a, MCU module sends out test signal in the picture blanking phase.
As advanced optimizing, the test signal is RGB sequential pulses.
The beneficial effects of the invention are as follows：Fixed test pulse is sent out using the picture blanking phase, passes through the reality to rgb light intensity
When measure realize on DLP laser projections realize automatic white balance adjustment, so as to solve the problems, such as white balance deviate.
Description of the drawings
Fig. 1 is the optical principle schematic diagram using fluorescent powder type DLP projector；
Fig. 2 is the DLP laser projection automatic white balance adjusting apparatus schematic diagrames in the present invention；
Automatic white balance adjustment method flow chart in the present invention of Fig. 3 positions.
Specific embodiment
The present invention is directed to propose a kind of DLP laser projections automatic white balance adjusting apparatus and method, solve traditional technology
The problem of white balance offset, can occur in use for middle laser projection.Its core concept is：It is sent out using the picture blanking phase
Go out fixed test pulse, the realization automatic white balance tune on DLP laser projections is realized by real-time measure to rgb light intensity
It is whole.Laser projection can be made to be overcome in the long-term use because of laser diode attenuation, fluorescent powder attenuation and various attenuation
Color temperature shift caused by imbalance keeps the stabilization of white balance.
For ease of understanding, present invention is initially set forth the operation principle of DLP laser projections once, as shown in Figure 1；
The laser that blue laser diode 1 is sent out excites fluorescent wheel 2, on fluorescent wheel 2 red green fluorescence powder be stimulated generate it is red
(R), green (G) visible ray, blue light are then derived from blue laser pipe in itself, and pass through speculum 3,4 and enter filter together with red-green glow
Halo 5 carries out wavelength correction, and then RGB visible ray carries out even light by lens group 6 into optical wand 7, then by even light
Light is imaged after lens group 8, TIR prism 9 on DMD10, finally projects away light by camera lens 11, generates projection
Picture.Wherein DMD10 is a kind of digital micro-mirror, is the display chip of core in DLP projection system.According to DMD displaying principles, need
Picture (bright field scape) to be shown projects away from camera lens, and the picture without showing (black scene) is then reflected into light
OFF light irradiation positions 12.
To solve the white balance offset problem of above-mentioned DLP laser projections, the DLP laser projections in the present invention are automatically white
Balance adjusting device is as shown in Fig. 2, it includes
Photoelectric sensor 21, A/D modular converters 22, MCU module 23, LD (laser diode) drive module 25, at image
Manage device 26, LD drive waveforms editing machine 24；The photoelectric sensor 21 connects A/D modular converters 22, the A/D modular converters 22
Connect MCU module 23；Described image processor 26 connects MCU module 23；The MCU module 23 connects LD drive waveforms editing machines
24；The LD drive waveforms editing machine 24 connects LD drive modules 25.
In specific implementation, photoelectric sensor should be all-wave length (400-700nm) photoelectric sensor, should be placed in
RGB can be blended in the light path of white light, can complete the measurement of RGB using 1 sensor in this way.What specific consideration was placed can
Implementation, can be placed on optical wand or OFF light irradiation positions.
A/D converter considers precision, should at least use more than 8Bit.The MCU module is used for into picture blanking
Send out independent test signal during the phase, the photoelectric sensor test brightness and after A/D is converted feeds back to brightness data
MCU module；Brightness data and predetermined luminance data are compared by the MCU module, are obtained correction value and are sent the LD to
Drive waveforms editing machine；The LD drive waveforms editing machine accordingly corrects the waveform that LD drives according to correction value, then
Control the LD drive modules adjustment current power size.
Based on above device, the automatic white balance adjustment method that the present invention realizes is as shown in Figure 3；
MCU23 first sends out test pulse during the blanking of image, and test pulse is RGB sequential transmissions, because scheming
The blanking interval of picture, the light sent out at this time, it will be all reflected into OFF light irradiation positions, will not be cast out from camera lens, also
The image normally shown will not be impacted.After each independent test pulse is sent out, MCU will pass through photoelectric sensor, A/D
Converter measures, and test data is compared with initially setting up data, is adjusted by fixed algorithm, by adjustment amount with
The form of control signal gives LD drive waveforms editing machines, which is responsible for being modified the waveform that LD drives and then controlling again
LD drivers processed reach the current power size for correcting LD in different phase, so as to fulfill the dynamic auto adjustment of white balance.It surveys
Examination pulse sends out the blanking interval for needing to show in normal picture, and interval can be generally required depending on actual conditions more than one
Frame cycle of images.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied, all within the spirits and principles of the present invention, any modification for being made,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (4)
1.DLP laser projection automatic white balance adjusting apparatus, which is characterized in that including：
Photoelectric sensor, A/D modular converters, MCU module, LD drive modules, image processor, LD drive waveforms editing machines；Institute
Photoelectric sensor connection A/D modular converters are stated, the A/D modular converters connect MCU module；Described image processor connects MCU
Module；The MCU module connects LD drive waveforms editing machines；The LD drive waveforms editing machine connects LD drive modules；
Described image processor is used for image procossing and informs the initial time of MCU module picture blanking phase, and the MCU module is used
Independent test signal is sent out when the picture blanking phase is being entered, the photoelectric sensor test brightness and after A/D is converted,
Brightness data is fed back into MCU module；Brightness data and predetermined luminance data are compared by the MCU module, are corrected
It is worth and sends the LD drive waveforms editing machine to；The LD drive waveforms editing machine according to correction value to the waveform that LD drives into
Row is corresponding to be corrected, and then controls the LD drive modules adjustment current power size.
2. DLP laser projections automatic white balance adjusting apparatus as described in claim 1, which is characterized in that the photoelectric transfer
Sensor is all-wave length photoelectric sensor, is arranged on the optical wand of DLP laser projections or OFF light irradiation positions.
3.DLP laser projection automatic white balance adjustment methods, which is characterized in that include the following steps：
A.MCU modules send out test signal in the picture blanking phase；
B. photoelectric sensor test brightness and after A/D is converted, feeds back to MCU module by brightness data；
Brightness data compared with predetermined luminance data, is obtained correction value and sends LD drive waveforms editing machines to by c.MCU modules；
D.LD drive waveforms editing machine accordingly corrects the waveform that LD drives according to correction value, then controls LD drive modules
Adjust current power size.
4. DLP laser projections automatic white balance adjustment method as claimed in claim 3, which is characterized in that the test letter
Number be RGB sequential pulses.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611007839.3A CN106324965B (en) | 2016-11-16 | 2016-11-16 | DLP laser projection automatic white balance adjusting apparatus and method |
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| CN201611007839.3A CN106324965B (en) | 2016-11-16 | 2016-11-16 | DLP laser projection automatic white balance adjusting apparatus and method |
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| CN106324965A CN106324965A (en) | 2017-01-11 |
| CN106324965B true CN106324965B (en) | 2018-06-15 |
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| CN201611007839.3A Active CN106324965B (en) | 2016-11-16 | 2016-11-16 | DLP laser projection automatic white balance adjusting apparatus and method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254159A (en) * | 2018-02-07 | 2018-07-06 | 北京镭创高科光电科技有限公司 | A kind of white balance detection device of laser display system |
| CN108320699B (en) * | 2018-04-25 | 2024-01-30 | 深圳市爱协生科技股份有限公司 | Receiving card for LED display |
| CN110687743B (en) * | 2018-07-05 | 2021-10-15 | 中强光电股份有限公司 | Projection system, light beam generating device thereof and control method of light beam brightness |
| CN110597001A (en) * | 2019-09-12 | 2019-12-20 | 合肥全色光显科技有限公司 | Automatic control method and system for white balance of RGB laser projector |
| CN110798188B (en) * | 2019-11-12 | 2021-06-22 | 四川长虹电器股份有限公司 | Device for automatically adjusting LD current turn-off delay of projector and control method |
| CN114911120B (en) | 2021-02-09 | 2024-04-05 | 台达电子工业股份有限公司 | Light source module and projection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1423488A (en) * | 2001-12-07 | 2003-06-11 | 姜牧 | Automatic self-balance regulating technique and related display unit |
| WO2010151312A1 (en) * | 2009-06-25 | 2010-12-29 | Eastman Kodak Company | Dump path light intensity sensing in-light projector |
| CN102520568A (en) * | 2011-11-30 | 2012-06-27 | 四川长虹电器股份有限公司 | Laser projection display system |
| CN104730823A (en) * | 2015-01-28 | 2015-06-24 | 南靖万利达科技有限公司 | White balance adjustment device and method suitable for DLP projector |
| CN105388693A (en) * | 2015-12-31 | 2016-03-09 | 中国华录集团有限公司 | Laser projector color automatic control system |
-
2016
- 2016-11-16 CN CN201611007839.3A patent/CN106324965B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1423488A (en) * | 2001-12-07 | 2003-06-11 | 姜牧 | Automatic self-balance regulating technique and related display unit |
| WO2010151312A1 (en) * | 2009-06-25 | 2010-12-29 | Eastman Kodak Company | Dump path light intensity sensing in-light projector |
| CN102520568A (en) * | 2011-11-30 | 2012-06-27 | 四川长虹电器股份有限公司 | Laser projection display system |
| CN104730823A (en) * | 2015-01-28 | 2015-06-24 | 南靖万利达科技有限公司 | White balance adjustment device and method suitable for DLP projector |
| CN105388693A (en) * | 2015-12-31 | 2016-03-09 | 中国华录集团有限公司 | Laser projector color automatic control system |
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| CN106324965A (en) | 2017-01-11 |
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