CN108255005A - For the three primary light source control of laser projection and color measurement system - Google Patents
For the three primary light source control of laser projection and color measurement system Download PDFInfo
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- CN108255005A CN108255005A CN201711475377.2A CN201711475377A CN108255005A CN 108255005 A CN108255005 A CN 108255005A CN 201711475377 A CN201711475377 A CN 201711475377A CN 108255005 A CN108255005 A CN 108255005A
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- 238000005259 measurement Methods 0.000 title claims abstract description 16
- 238000012937 correction Methods 0.000 claims abstract description 5
- 239000003086 colorant Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000004040 coloring Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 238000005286 illumination Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 206010015150 Erythema Diseases 0.000 description 1
- 241001062009 Indigofera Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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Classifications
-
- 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
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
- G01J3/513—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters having fixed filter-detector pairs
-
- 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
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
- G01J3/513—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters having fixed filter-detector pairs
- G01J2003/516—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters having fixed filter-detector pairs with several stacked filters or stacked filter-detector pairs
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
The present invention discloses three primary light source control and the color measurement system of a kind of laser projection, with projector's main controller, projector's main controller controls laser light source driver by PWMs pulses or spi bus, laser light source driver control connects RGB laser, color collector connects MCU control module, MCU control module output connection projector main controller；It needs repeatedly to measure averaged by hardware configuration and using specific single-chip microcomputer control program flow, single color acquisition program circuit and color acquisition system to carry out white balance check and correction, the color needed according to image display, drive RGB laser works, realize either alternatively or simultaneously working for RGB laser, make color, light source Proper Match, drop shadow effect reaches best.
Description
Technical field
The invention belongs to laser projection system technical fields, and in particular to a kind of three primary light source for laser projection
Control and color measurement system.
Background technology
It is the core component in projection display equipment that optics, which draws automotive engine system, it directly determines projection display equipment product
Performance indicator and core cost.It is gamut range that whether color, which enriches most basic determinant, secondly display device is (i.e.
Liquid crystal) to gamma curve reduction accuracy influence, light engine colour gamut cover and light-use on performance determine
The quality that final Tou shadow Xian Shi Installed are put, and liquid crystal does not shine in itself, but show image by the light of transmission illumination light, therefore
The influence of lighting source and display device to gamma curve determines the gamut range of liquid crystal display.Just because of above reason,
So industry requires wider array of colour gamut covering and higher luminous energy profit on the lighting source to display unit (liquid crystal board) always
With rate.And previous high-pressure sodium lamp (UH) and White-light LED illumination by white light color separation into right respectively after red, green, blue three primary colours
Three pieces liquid crystal is illuminated, and due to the technical characterstic of itself, each primary colours in three primary colours are all because white before color separation
Light spectrum is influenced, it is difficult to be realized the narrowband wavelength of single wavelength or approximate single wavelength, and is difficult to three kinds of red, green, blue
Primary colours are individually modulated, and therefore, it is difficult to obtain the primary chromaticity coordinate of wider colour gamut covering, high-pressure sodium lamp (UHP) is shone among these
Bright optical engine system can also be because of its light source life and calorific value and ultraviolet light to liquid crystal board and organic component aging
The problems such as influence and denounced by market, the optical system of white light LEDs splitting illumination due to angle of incident light to be ensured,
It is difficult to promote the intensity of three primary colours light by improving white light energy, therefore, it is difficult to capture the threshold of brightness.In addition previous white light
The colour splitting system that must have in color separation lighting engineering, thus this optical engine system there is it is of high cost, luminous energy rate is low
The defects of, using upper all unsatisfactory.
Invention content
To solve drawbacks described above of the existing technology, the purpose of the present invention is to provide a kind of for laser projection
Three primary light source controls and color measurement system, according to the color that image display needs, drives RGB laser works, realizes
RGB laser either alternatively or simultaneously works, make color, light source Proper Match, drop shadow effect reaches best.
To achieve the above object, the technical solution adopted by the present invention：The three primary light source control of the laser projection and face
Color measuring system has projector's main controller, it is characterised in that：Projector's main controller passes through PWMs pulses or spi bus
Control laser light source driver, laser light source driver control connection RGB laser, color collector connection MCU control moulds
Block, MCU control module output connection projector main controller；
Color signal (intensity of laser light source three coloured light) is converted into corresponding frequency signal by TCS3200D color sensors, and
Be transferred to microcontroller, SCM system when handling color signal using the method for continuous cycle detection, by TCS3200D colors
Sensor constantly reads the color signal of testee, and microcontroller constantly detects the frequency signal of color measuring sensor output,
Thus the degree of saturation of 3 kinds of colors of red, green, blue is detected respectively, microcontroller passes through the color (frequency) that is transmitted to TCS3200D
The interruption times of signal within a certain period of time are counted, so as to measure the frequency values corresponding to 3 kinds of color degree of saturation, so
Afterwards, by serial ports or SPI port, DLP projector main controller is passed data to, is controlled and swashed by PWMs pulses or spi bus
Radiant driver according to the color that image display needs, drives RGB laser works, realizes the friendship of RGB laser
It replaces or works at the same time；
After system electrification, color acquisition system initializes microcontroller, TCS3200D color sensors, and in test face
It has to carry out white balance to TCS3200D before color, if white balance button is not pressed, judges whether there is color identification,
Measurement subprogram is called if having color identification, is otherwise returned, waiting measures next time;It is called if white balance is by key pressing
Then white balance subprogram carries out color identification；
Color acquisition system needs repeatedly to measure averaged to carry out white balance check and correction, and specific method is exactly:In color
The top of sensor assembly is subject to the light source of white（R=255, G=255, B=255）, white light entered on color sensor,
By repeatedly measuring, red, green, blue wave filter obtains the average frequency value of red, green, blue, when being converted into 255,
The value needed is exactly scale factor
Measure obtained frequency values, scale factor is multiplied by, practical measurement is obtained and obtains the corresponding standard of frequency values
R, G, B value.
Microcontroller color measuring and the single color acquisition flow of data processing:First system is initialized, selects face
Red wave filter, counter start timing on colour sensor, and when timing is to 20ms, counter stops counting, and reads at this time
The frequency values of red filter, then the frequency values of red filter are multiplied by scale factor and obtain the R values of practical red channel；Again
Wave filter green on color sensor is selected, counter starts timing, and when timing is to 20ms, counter stops counting, and reads
The frequency values of green filter at this time are taken, then the frequency values of green filter are multiplied by scale factor and obtain practical green channel
G values；The wave filter of color sensor blue is finally selected, counter starts timing, and when timing is to 20ms, counter stops
It counts, reads the frequency values of blue electric-wave filter at this time, then the frequency values of blue electric-wave filter are multiplied by scale factor and obtain practical indigo plant
The B values of chrominance channel.It sends the practical rgb value of three obtained to DDP4422, host computer is waited for say the word, carry out next round survey
Amount；
Single-chip microcomputer control program flow:It is the initialization of carry out system first, then system receives the address letter from DDP4422
Number, microcontroller judges whether address signal exists on this block circuit board, will be into if address is existing on the board
The signal acquisition of row color sensor, and collected data are transported in DDP4422.If address is not present, then is
System continues waiting for receiving and carrys out address signal back to address receiving area；DDP4422 receive color sensor color data R,
G, after B values, judge colouring information and drive laser light source three driving values compared with, the difference of the two whether in allowed limits,
If in allowed band, can not process；If difference range is more than allowed band, needs to carry out alert process, check
Laser light source driving value, and further search for the reason of color deviates.
Using the advantageous effect of above-mentioned technical proposal：Three primary light source control and the color measuring system of the laser projection
System is adopted by hardware configuration and using specific single-chip microcomputer control program flow, single color acquisition program circuit and color
Collecting system needs repeatedly to measure averaged to carry out white balance check and correction, and according to the color that image display needs, driving is red green
Blue laser works realize that RGB laser either alternatively or simultaneously works, make color, light source Proper Match, drop shadow effect
Reach best.
Description of the drawings
Specific embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the overview flow chart of system；
Fig. 2 is the functional diagram of each pin of TCS230 chips；
Fig. 3 is color acquisition circuit diagram；
Fig. 4 is the connection figure of color sensor TCS3200 and microcontroller；
Fig. 5 is the color measuring of microcontroller setting and the single main flow of data processing；
Fig. 6 is single-chip microcomputer control program flow chart.
Specific embodiment
As shown in figures 1 to 6, the three primary light source control of the laser projection and color measurement system, have projector's master control
Device, it is characterised in that：Projector's main controller controls laser light source driver, laser light by PWMs pulses or spi bus
Source drive control connection RGB laser, color collector connection MCU control module, MCU control module output connection are thrown
Shadow machine main controller.
Color measuring module：
TCS3200 color sensors are the newer generation color sensors of TAOS companies, can be direct by colored optical signal
It is converted into frequency signal.TCS3200 employs 8 pinned overlay packageds, and small volume is convenient for insertion.Figure is shown in encapsulation.
64 photodiodes are integrated on one chip, these diodes are divided into four types, 16 photoelectricity two
Pole pipe carries red filter；16 photodiodes carry green filter；16 photodiodes carry blue electric-wave filter,
Remaining 16, without any wave filter, can penetrate whole optical informations, these photodiodes are to intersect row in the chip
Row, the inhomogeneities of incident radiation can be reduced to the maximum extent, so as to increase the accuracy of color identification；During work,
By two programmable pins come the required wave filter of dynamic select, the typical reference frequency output of the sensor from
2Hz-500kHz, user can also select 100%, 20% or 2% output-scale-factor by two programmable pins,
Or power remove pattern.Output-scale-factor makes the output of sensor can adapt to different measurement ranges, improves the suitable of it
It should be able to power.
When incident light projects TCS3200, pass through the various combination of photodiode controlling switch S2, S3, Ke Yixuan
Select different wave filters；The square wave of different frequency is exported after overcurrent to frequency converter（Duty ratio is 50%）, it is different
Color and light intensity correspond to the square wave of different frequency；Can also controlling switch S0, S1 be calibrated by output, select different output ratios
The example factor, is adjusted reference frequency output, to adapt to different demands.
S0, S1 are used to select output-scale-factor or power remove pattern；S2, S3 are used to select the type of wave filter；OE
Counter is that rate-adaptive pacemaker enables pin, can control the state of output, when the output for having multiple chip pins to share microprocessor is drawn
During foot, chip selection signal is can also be used as, OUT is rate-adaptive pacemaker pin, and GND is the grounding pin of chip, and VCC provides work for chip
Make voltage, table 3.1 is the available combination of S0, S1 and S2, S3.
The combination option of table 3.1 S0, S1 and S2, S3
The design employs microcontroller（AT89S51）Color acquisition circuit is had devised with TCS3200, circuit structure is simple,
Color sensor communicates real-time Communication for Power with microprocessing unit, timely by color detection result in unit in order to control is passed to.Face
Color Acquisition Circuit figure is as seen in figures 3-6
After system electrification, the programming of color acquisition system mainly carries out microcontroller, TCS3200D color sensors
Initialization, and had to before color is tested to TCS3200D progress white balances.If white balance button is not pressed, sentence
It is disconnected whether to have color identification, measurement subprogram is called if having color identification, is otherwise returned, waiting measures next time;It is if white
Balance is then called white balance subprogram by key pressing, then carries out color identification.The overview flow chart of system is as shown in the figure.
Blank level adjustment must be carried out before test.White balance be exactly tell system what be white.Theoretically, it is white
It is to be mixed by red, the green and blue of equivalent.But in fact, the three primary colors in white are not fully equal, and
For the optical sensor of TCS3200D, it is different to the sensibility of these three Essential colour, leads to TCS3200D's
RGB outputs are simultaneously unequal, and carrying out blank level adjustment can make TCS3200D be equal to the three primary colors in " white " that is detected.
In order to ensure the accuracy of white balance, color acquisition system needs repeatedly to measure averaged to carry out white balance
Check and correction.Specifically method is exactly:In the top of color sensor module, it is subject to the light source of white（R=255, G=255, B=255
）, white light is entered on color sensor, and by repeatedly measuring, red, green, blue wave filter obtains the frequency averaging of red, green, blue
Value, when being converted into 255, the value needed is exactly scale factor
When actually measuring, the frequency values that measure, scale factor is multiplied by, practical measurement is obtained and obtains frequency
It is worth corresponding standard R, G, B value.
The main flow of single color acquisition program:First system is initialized, is selected red on color sensor
Wave filter, counter start timing, and when timing is to 20ms, counter stops counting, and reads the frequency of red filter at this time
Value, then the frequency values of red filter are multiplied by scale factor and obtain the R values of practical red channel；On reselection color sensor
The wave filter of green, counter starts timing, and when timing is to 20ms, counter stops counting, and reads green filter at this time
Frequency values, then the frequency values of green filter are multiplied by scale factor and obtain the G values of practical green channel；Finally select color
The wave filter of sensor blue, counter start timing, and when timing is to 20ms, counter stops counting, and read blue at this time
The frequency values of color filter, then the frequency values of blue electric-wave filter are multiplied by scale factor and obtain the B values of actual blue channel.Will
To three practical rgb values send DDP4422 to, host computer is waited for say the word, carries out next wheel measurement.
Single-chip microcomputer control program flow:It is the initialization of carry out system first, then system receives the ground from DDP4422
Location signal, microcontroller judge whether address signal exists on this block circuit board, if address is existing on the board,
The signal acquisition of color sensor will be carried out, and collected data are transported in DDP4422.If address is not present, that
System returns to address receiving area, continues waiting for receiving and carrys out address signal.DDP4422 receives the number of colours of color sensor
After R, G, B value, compared with judging colouring information and driving three driving values of laser light source, the difference of the two whether permission range
It is interior, if in allowed band, can not process；If difference range is more than allowed band, need to carry out alert process, inspection
Laser light source driving value is looked into, and further searches for the reason of color deviates.
Claims (1)
1. a kind of three primary light source control of laser projection and color measurement system, have projector's main controller, feature exists
In：Projector's main controller controls laser light source driver, laser light source driver control by PWMs pulses or spi bus
Connect RGB laser, color collector connection MCU control module, MCU control module output connection projector main controller；
Color signal (intensity of laser light source three coloured light) is converted into corresponding frequency signal by TCS3200D color sensors, and
Be transferred to microcontroller, SCM system when handling color signal using the method for continuous cycle detection, by TCS3200D colors
Sensor constantly reads the color signal of testee, and microcontroller constantly detects the frequency signal of color measuring sensor output,
Thus the degree of saturation of 3 kinds of colors of red, green, blue is detected respectively, microcontroller passes through the color (frequency) that is transmitted to TCS3200D
The interruption times of signal within a certain period of time are counted, so as to measure the frequency values corresponding to 3 kinds of color degree of saturation, so
Afterwards, by serial ports or SPI port, DLP projector main controller is passed data to, is controlled and swashed by PWMs pulses or spi bus
Radiant driver according to the color that image display needs, drives RGB laser works, realizes the friendship of RGB laser
It replaces or works at the same time；
After system electrification, color acquisition system initializes microcontroller, TCS3200D color sensors, and in test face
It has to carry out white balance to TCS3200D before color, if white balance button is not pressed, judges whether there is color identification,
Measurement subprogram is called if having color identification, is otherwise returned, waiting measures next time;It is called if white balance is by key pressing
Then white balance subprogram carries out color identification；
Color acquisition system needs repeatedly to measure averaged to carry out white balance check and correction, and specific method is exactly:In color
The top of sensor assembly is subject to the light source of white（R=255, G=255, B=255）, white light entered on color sensor,
By repeatedly measuring, red, green, blue wave filter obtains the average frequency value of red, green, blue, when being converted into 255,
The value needed is exactly scale factor
Measure obtained frequency values, scale factor is multiplied by, practical measurement is obtained and obtains the corresponding standard of frequency values
R, G, B value
Microcontroller color measuring and the single color acquisition flow of data processing:First system is initialized, color is selected to pass
Red wave filter, counter start timing on sensor, and when timing is to 20ms, counter stops counting, and read red at this time
The frequency values of wave filter, then the frequency values of red filter are multiplied by scale factor and obtain the R values of practical red channel；Reselection
Green wave filter, counter start timing on color sensor, and when timing is to 20ms, counter stops counting, and reads this
When green filter frequency values, then the frequency values of green filter are multiplied by scale factor and obtain the G values of practical green channel；
The wave filter of color sensor blue is finally selected, counter starts timing, and when timing is to 20ms, counter stops meter
Number, reads the frequency values of blue electric-wave filter at this time, then the frequency values of blue electric-wave filter are multiplied by scale factor and obtain actual blue
The B values of channel,
It sends the practical rgb value of three obtained to DDP4422, host computer is waited for say the word, carries out next wheel measurement；Microcontroller
Control program circuit:It is the initialization of carry out system first, then system receives the address signal from DDP4422, microcontroller
Judge whether address signal exists on this block circuit board, if address is existing on the board, color biography will be carried out
The signal acquisition of sensor, and collected data are transported in DDP4422,
If address is not present, then system returns to address receiving area, continues waiting for receiving and carrys out address signal；DDP4422 connects
After color data R, G, B value for receiving color sensor, compared with judging colouring information and driving three driving values of laser light source, two
In allowed limits whether the difference of person, if in allowed band, can not process；If difference range is more than to allow model
It encloses, then needs to carry out alert process, check laser light source driving value, and further search for the reason of color deviates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711475377.2A CN108255005A (en) | 2017-12-29 | 2017-12-29 | For the three primary light source control of laser projection and color measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711475377.2A CN108255005A (en) | 2017-12-29 | 2017-12-29 | For the three primary light source control of laser projection and color measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108255005A true CN108255005A (en) | 2018-07-06 |
Family
ID=62724599
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| CN201711475377.2A Pending CN108255005A (en) | 2017-12-29 | 2017-12-29 | For the three primary light source control of laser projection and color measurement system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120062849A1 (en) * | 2010-09-10 | 2012-03-15 | Himax Display, Inc. | Projection apparatus |
| CN103512658A (en) * | 2012-06-29 | 2014-01-15 | 深圳市祈飞科技有限公司 | Color identification system and method |
| CN204215219U (en) * | 2014-10-31 | 2015-03-18 | 深圳市帅映科技有限公司 | A kind of laser projection hardware system |
| CN106933010A (en) * | 2015-12-31 | 2017-07-07 | 无锡视美乐激光显示科技有限公司 | Projector equipment and its method for controlling projection |
| CN107167243A (en) * | 2017-07-05 | 2017-09-15 | 哈尔滨理工大学 | A kind of four-way Color Recognition System based on TCS3200D |
-
2017
- 2017-12-29 CN CN201711475377.2A patent/CN108255005A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120062849A1 (en) * | 2010-09-10 | 2012-03-15 | Himax Display, Inc. | Projection apparatus |
| CN103512658A (en) * | 2012-06-29 | 2014-01-15 | 深圳市祈飞科技有限公司 | Color identification system and method |
| CN204215219U (en) * | 2014-10-31 | 2015-03-18 | 深圳市帅映科技有限公司 | A kind of laser projection hardware system |
| CN106933010A (en) * | 2015-12-31 | 2017-07-07 | 无锡视美乐激光显示科技有限公司 | Projector equipment and its method for controlling projection |
| CN107167243A (en) * | 2017-07-05 | 2017-09-15 | 哈尔滨理工大学 | A kind of four-way Color Recognition System based on TCS3200D |
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