CN105227942B - System is arranged in a kind of projector's colour temperature setting method and colour temperature - Google Patents
System is arranged in a kind of projector's colour temperature setting method and colour temperature Download PDFInfo
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- CN105227942B CN105227942B CN201510542572.7A CN201510542572A CN105227942B CN 105227942 B CN105227942 B CN 105227942B CN 201510542572 A CN201510542572 A CN 201510542572A CN 105227942 B CN105227942 B CN 105227942B
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Abstract
The present invention relates to a kind of projector's colour temperature setting methods, include the following steps：S1. a kind of Initial R GB duty ratios C is set to projectorR0、CG0、CB0, when switching R pictures, G pictures and B picture respectively, and making switching R pictures, G pictures and B picture, the current value of each picture is transferred to maximum；The brightness value L of detection R pictures, G pictures and B picture central point respectivelyR、LG、LBWith colour brightness value；It is deviated near the left and right sides of the colour brightness value of detection according to the otherness between different projector RGB lamps and chooses a colour temperature, the colour brightness value of the colour temperature is expressed as (xR, yR)、(xG, yG)、(xB, yB)、(xw, yw, Yw)；S2. according to the brightness value L of the R pictures of detection, G pictures and B picture central pointR、LG、LBWith colour brightness value (xR, yR)、(xG, yG)、(xB, yB)、(xw, yw, Yw) converse RGB dutyfactor values corresponding to the colour temperature；S3. one group of color dot (x under the RGB dutyfactor values is remeasuredR1, yR1)、(xG1, yG1)、(xB1, yB1), and the corresponding colour brightness value of the colour temperature is calculated according to RGB dutyfactor values；Then the RGB dutyfactor values of calculating, the corresponding colour brightness value of the colour temperature being computed are burned onto projector.
Description
Technical field
The present invention relates to big-wall splicing projector's display field more particularly to a kind of projector's colour temperature setting method and colors
Warm setting system.
Background technology
Multi-screen splicing visualization application scenarios are a dark horse nearly ten years, especially DLP pure digi-tals projector LED light source
Birth, allow more command schedulings visualization spelling wall colors as fields such as military affairs, traffic, bank, the energy, TV station studios
It is more gorgeous, display effect is more superior, longer life expectancy is long, be spell wall system on moment instead of UHP light sources projector
And become mainstream.It is well known that the smoothness of 256 grayscale of projector directly affects the quantity of projector color and each picture
Sophistication, but it is easy to appear colour contamination phenomenons for 256 grayscale of LED projection machine.Therefore, although LED projection machine has many advantages, such as,
There is also two hang-ups spelled in wall field of projector：1, white picture bright chroma caused by the otherness between RGB lamps is difficult to one
The problem of cause property, this annoyings always the adjustment of whole wall picture uniformity；2, the red, green, blue of 256 grey menus, blueness, Huang, purple
Etc. the amendment of various colour contamination phenomenons.
Invention content
The present invention is to solve the defect of the above technology, provides a kind of projector's colour temperature setting method, this method is not according to
It is deviated near the left and right sides of the colour brightness value of detection with the otherness between projector's RGB lamps and chooses a colour temperature to carry out
The calculating of RGB dutyfactor values, to compensate the otherness between different projector RGB lamps so that the tune of whole wall picture uniformity
It is whole more easy.
To realize the above goal of the invention, the technical solution adopted is that：
A kind of projector's colour temperature setting method, includes the following steps：
S1. a kind of Initial R GB duty ratios C is set to projectorR0、CG0、CB0, switch R pictures, G pictures and B picture respectively,
And when making switching R pictures, G pictures and B picture, the current value of each picture is transferred to maximum；Detection R pictures, G pictures and B respectively
The brightness value L of picture central pointR、LG、LBWith colour brightness value；According to the otherness between different projector RGB lamps detection color
The left and right sides of brightness value nearby deviates and chooses a colour temperature；
S2. according to the brightness value L of the R pictures of detection, G pictures and B picture central pointR、LG、LBIt is conversed with colour brightness value
RGB dutyfactor values corresponding to the colour temperature；
S3. one group of color dot (x under the RGB dutyfactor values is remeasuredR1, yR1)、(xG1, yG1)、(xB1, yB1), and root
The corresponding colour brightness value of the colour temperature is calculated according to RGB dutyfactor values；Then by the RGB dutyfactor values of calculating, the colour temperature pair being computed
The colour brightness value answered is burned onto projector.
Meanwhile the present invention also corresponds to and provides a kind of colour temperature setting system, specific technical solution is as follows：
A kind of colour temperature setting system, including detection module, conversion module and computing module；
Wherein detection module is used to detect the brightness value L of R pictures, G pictures and B picture central pointR、LG、LBAnd colour brightness
Value；
The RGB dutyfactor values that conversion module is used to convert corresponding to colour temperature；
Computing module is used to calculate the corresponding colour brightness value of colour temperature according to RGB dutyfactor values；
Compared with prior art, the beneficial effects of the invention are as follows：
Colour temperature setting method provided by the invention according to the otherness between different projector RGB lamps detection colour brightness
The left and right sides of value, which nearby deviates, chooses a colour temperature to carry out the calculating of RGB dutyfactor values, to compensate different projector RGB
Otherness between lamp so that the adjustment of whole wall picture uniformity is more easy；The present invention also provides a kind of amendment throwings simultaneously
The method of 256 grey menu colour contamination of shadow machine, this method can abandon the side that a traditional people reads people record with one man operation
Formula, and figure-shape combination can position the problem of occurring quickly, with traditional repeated measurement compared with modified method, target
More clear, Resolving probiems get up rapider.
Description of the drawings
Fig. 1 is the structural schematic diagram that system is arranged in colour temperature.
Fig. 2 is the structural schematic diagram of three kinds of common colour temperatures and color dot.
Fig. 3 is black body radiation and the triangular graph of maximum gamut.
Fig. 4 is the schematic diagram that corresponding colour temperature color coordinate drift is chosen.
Fig. 5 is the oscillogram that green measures brightness value fitting.
Fig. 6 is the red oscillogram for measuring brightness value fitting.
Fig. 7 is the oscillogram that blue measures brightness value fitting.
Fig. 8 is the oscillogram that yellow measures brightness value fitting.
Specific implementation mode
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
Below in conjunction with drawings and examples, the present invention is further elaborated.
Embodiment 1
As shown in Fig. 2, the standard color temperature on three kinds of most common blackbody curves is respectively：It applies in TV station studio
The corresponding chromaticity coordinates of 3200K is (x3200, y3200)=(0.410,0.390)；Apply the corresponding colors of 6500K in pure video monitoring
Coordinate is (x6500, y6500)=(0.313,0.323)；Apply the 9300K of the control room in display Computer signal and vision signal
Corresponding chromaticity coordinates is (x9300, y9300)=(0.283,0.297).And generally spell wall with projector all should include 3200K,
Tri- kinds of colour temperatures of 6500K, 9300K, and converted between each colour temperature it is adjustable, as shown in figure 3,301 indicate the higher greens of saturation degree
Point (0.2745,0.6616), 302 indicate the higher red point (0.6938,0.3053) of saturation degree, and 303 indicate saturation degree highest
Blue dot (0.1433,0.0264), then this 3 points compositions is area is larger in gamut range triangle, 304 indicate
Black body radiation color temperature value curve, 305,306,307 indicate 3200K, 6500K, 9300K respectively.
It is directed to and spells the difficult problem of the white picture uniformity adjustment of wall, the present invention provides a kind of projector's colour temperature setting sides
Method, concrete scheme are as follows：S1. a kind of Initial R GB duty ratios C is set to projectorR0、CG0、CB0, switch R pictures respectively, G is drawn
Face and B picture, and when making switching R pictures, G pictures and B picture, the current value of each picture is transferred to maximum；Detection R is drawn respectively
The brightness value L in face, G pictures and B picture central pointR、LG、LBWith colour brightness value；According to the difference between different projector RGB lamps
Property near the left and right sides of the colour brightness value of detection offset choose a colour temperature；
S2. according to the brightness value L of the R pictures of detection, G pictures and B picture central pointR、LG、LBIt is conversed with colour brightness value
RGB dutyfactor values corresponding to the colour temperature；
S3. one group of color dot (x under the RGB dutyfactor values is remeasuredR1, yR1)、(xG1, yG1)、(xB1, yB1), and root
The corresponding colour brightness value of the colour temperature is calculated according to RGB dutyfactor values；Then by the RGB dutyfactor values of calculating, the colour temperature pair being computed
The colour brightness value answered is burned onto projector.
In said program, after completing step S3, colour temperature setting method further includes having to be modified 256 grayscale of projector
Step, it is specific as follows：
Detection obtains the brightness value of the corresponding RGB of colour temperature, and forms an oscillogram using least square fitting brightness value,
User quickly positions the reason of being likely to occur 256 grayscale colour contamination according to oscillogram, then corrects 256 ashes by repairing oscillogram
Rank colour contamination phenomenon.
In the present embodiment, the detailed process for the RGB dutyfactor values that convert is as follows：
Brightness value (the L of each color unit duty ratio is calculated firstR0、LG0、LB0)；
Wherein
The colour brightness value of colour temperature is expressed as (xw, yw, Yw),
Then
Wherein Xw、ZwX values and Z values respectively in white tristimulus values, and by (xR, yR) known to：
Wherein XRFor the X values in red tristimulus values, ZRFor the Z values in red tristimulus values, YRFor three red thorns
Swash the Y value in value, can similarly obtain (XG, ZG) and (XB, ZB) expression formula, wherein XG、YGX respectively in green tristimulus values
Value and Y value, XB、YBX values and Y value respectively in blue tristimulus values；
It can be obtained from above,
Y can be sought by above formulaR、YG、YBThree unknown numbers, seek YR、YG、YBAfterwards, RGB dutyfactor values (C is calculatedR、CG、
CB)；
Wherein CR=YR/LR0；CG=YG/LG0；CB=YB/LB0。
And it calculates the corresponding colour brightness value of colour temperature and is as follows：
Wherein
XW1、YW1、ZW1Respectively color dot (xR1, yR1)、(xG1, yG1)、(xB1, yB1) white tristimulus values in X values, Y value
With Z values；
And due to
The corresponding colour brightness value (x of the colour temperature can be acquired by above-mentioned two formulaw1, yw1, Yw1)。
Meanwhile the present embodiment has also carried out specific experiment, specific data are as shown in Fig. 3~8：
Respectively two or more color dots is arranged in offset to colour temperature setting method provided by the invention around three kinds of colour temperatures, is mended with reaching
Repay the otherness between LED light, as shown in figure 4, respectively chosen around three kinds of colour temperatures two color dots 401 (0.273,
0.307)、402(0.297,0.287)；403(0.323,0.313)、404(0.303,0.333)；405(0.42,0.38)、406
(0.40,0.40), for LED projection machine chromaticity coordinates deviation within 0.02, the principle of selection is in 3200K, 6500K, 9300K color dot
X, y respectively deviate 0.02.If a spelling wall demand colour temperature is in 9300K, wherein the corresponding projector of a display unit is partially red partially yellow
Then select 401, if partially it is green it is partially green if select 402, it is while capable of thus keeping whole wall consistency to greatest extent that brightness is sacrificial
Domestic animal is minimized.
After setting a plurality of colour temperature, the calculating of colour brightness parameter is completed by colour temperature setting method, passes through minimum two
The assorted measurement brightness value of multiplication fitting operates as shown in figure 5, here by taking the processing of three kinds of common color temperatures as an example under other colour temperatures
It is consistent.As shown in figure 5,501,502,503 do not represent the green brightness value fitting oscillogram of 9300K, 6500K, 3200K,
256 grayscale of projector interlude in 3200K seriously goes here and there green in practice, and 9300K can be oriented quickly from fitting oscillogram
There is very large deviation in green measured value, and green colour contamination phenomenon can be corrected with 502,503 similar waveforms by being adapted to.256
Other colors of grayscale string can also be positioned with this method to be solved.
And to the red fitting oscillogram for measuring brightness value as shown in fig. 6,601,602,603 do not represent 9300K, 6500K,
The red brightness value of 3200K is fitted oscillogram, and 256 grayscale of projector interlude in 9300K seriously goes here and there red in practice, from quasi-
Conjunction oscillogram can orient 9300K red measured values and very large deviation occurs quickly, by being adapted to and 602,603 similar waves
Shape can correct red colour contamination phenomenon.
Another waveform is mutated as shown in fig. 7,701,702,703 respectively represent the blue of 9300K, 6500K, 3200K
Brightness value is fitted oscillogram, and 256 grayscale seriously go here and there blue when projector 3200K in practice, can be quickly by being fitted oscillogram
Find 703 the 4th value mutations, fitting waveform 703, which is adapted to 704 problems, by promoting the value can be solved, 256 strings other
Color this method is similarly suitable.
Another matched curve waveform passes through comparison as shown in figure 8,256 grayscale seriously go here and there yellow under colour temperature 6500K
It is larger to be fitted the later values fluctuation of 9 points of waveform graph discovery, which can be solved by modified quasi multiplex shape 802 to 801,256
It is similarly suitable to go here and there other color this method.
Embodiment 2
The also corresponding colour temperature setting system for providing colour temperature setting method described in a kind of Application Example 1 of the present embodiment,
Specific technical solution is as follows：
A kind of colour temperature setting system, as shown in Figure 1, including detection module 101, conversion module 102 and computing module 103；
Wherein detection module is used to detect the brightness value L of R pictures, G pictures and B picture central pointR、LG、LBAnd colour brightness
Value；
The RGB dutyfactor values that conversion module 102 is used to convert corresponding to colour temperature；
Computing module 103 is used to calculate the corresponding colour brightness value of colour temperature according to RGB dutyfactor values；
In specific implementation process, it further includes having 256 grayscale correcting module, 104,256 grayscale amendment that system, which is arranged, in colour temperature
Module 104 forms an oscillogram for being fitted brightness value, is then repaired to oscillogram according to the order of user.
Colour temperature setting method provided by the invention according to the otherness between different projector RGB lamps detection colour brightness
The left and right sides of value, which nearby deviates, chooses a colour temperature to carry out the calculating of RGB dutyfactor values, to compensate different projector RGB
Otherness between lamp so that the adjustment of whole wall picture uniformity is more easy；The present invention also provides a kind of amendment throwings simultaneously
The method of 256 grey menu colour contamination of shadow machine, this method can abandon the side that a traditional people reads people record with one man operation
Formula, and figure-shape combination can position the problem of occurring quickly, with traditional repeated measurement compared with modified method, target
More clear, Resolving probiems get up rapider.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement etc., should be included in the claims in the present invention made by within the spirit and principle of invention
Protection domain within.
Claims (2)
1. a kind of projector's colour temperature setting method, it is characterised in that：Include the following steps：
S1. a kind of Initial R GB duty ratios C is set to projectorR0、CG0、CB0, switch R pictures, G pictures and B picture respectively, and make
When switching R pictures, G pictures and B picture, the current value of each picture is transferred to maximum；Detection R pictures, G pictures and B picture respectively
The brightness value L of central pointR、LG、LBWith colour brightness value；According to the otherness between different projector RGB lamps detection colour brightness
The left and right sides of value nearby deviates and chooses a colour temperature；
S2. according to the brightness value L of the R pictures of detection, G pictures and B picture central pointR、LG、LBColor corresponding with the colour temperature of selection
Brightness value converses the RGB dutyfactor values corresponding to the colour temperature；
S3. one group of color dot under the RGB dutyfactor values is remeasured（xR1, yR1）、（xG1, yG1 ）、（xB1, yB1）, and according to RGB
Dutyfactor value calculates the corresponding colour brightness value of the colour temperature；Then by the RGB dutyfactor values of calculating, the corresponding color of colour temperature being computed
Brightness value is burned onto projector；
After completing step S3, colour temperature setting method further includes the steps that having to be modified 256 grayscale of projector, specific as follows：
Detection obtains the brightness value of the corresponding RGB of colour temperature, and forms an oscillogram, user using least square fitting brightness value
The reason of being likely to occur 256 grayscale colour contamination is quickly positioned according to oscillogram, then corrects 256 grayscale strings by repairing oscillogram
Color phenomenon.
2. system is arranged in a kind of colour temperature of colour temperature setting method of projector according to claim 1, which is characterized in that the color
Warm setting system includes detection module, conversion module and computing module；
Wherein detection module is used to detect the brightness value L of R pictures, G pictures and B picture central pointR、LG、LBWith colour brightness value；
The RGB dutyfactor values that conversion module is used to convert corresponding to colour temperature；
Computing module is used to calculate the corresponding colour brightness value of colour temperature according to RGB dutyfactor values；
The colour temperature setting system further includes having 256 grayscale correcting modules, and 256 grayscale correcting modules are formed for being fitted brightness value
Then one oscillogram repairs oscillogram according to the order of user.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107728413B (en) * | 2016-08-12 | 2019-07-16 | 深圳光峰科技股份有限公司 | Optical projection system and brightness adjusting method applied to optical projection system |
| CN111508450B (en) * | 2019-01-30 | 2021-08-31 | 北京小米移动软件有限公司 | Screen color conversion method and device, storage medium and electronic equipment |
| CN110031186B (en) * | 2019-05-17 | 2021-11-09 | 歌尔光学科技有限公司 | Projector optical machine testing system and method |
| CN111479101B (en) * | 2020-05-14 | 2021-11-16 | 歌尔光学科技有限公司 | White balance adjusting method, adjusting device and computer readable storage medium |
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| CN1437400A (en) * | 2002-02-06 | 2003-08-20 | 三星电子株式会社 | Equipment and method for raising colour temperature of colour image |
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| US20010030694A1 (en) * | 2000-03-15 | 2001-10-18 | Asahi Kogaku Kogyo Kabushiki Kaisha | Digital still camera performing white balance adjustment |
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| US8419193B2 (en) * | 2010-09-10 | 2013-04-16 | Himax Display, Inc. | Projection apparatus |
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| CN1437400A (en) * | 2002-02-06 | 2003-08-20 | 三星电子株式会社 | Equipment and method for raising colour temperature of colour image |
| CN101076128A (en) * | 2007-06-05 | 2007-11-21 | 广东威创日新电子有限公司 | Method and apparatus for correcting multi-screen connected wall |
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