CN110738957A - Display system and color characteristic measuring method - Google Patents

Display system and color characteristic measuring method Download PDF

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CN110738957A
CN110738957A CN201910876290.9A CN201910876290A CN110738957A CN 110738957 A CN110738957 A CN 110738957A CN 201910876290 A CN201910876290 A CN 201910876290A CN 110738957 A CN110738957 A CN 110738957A
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rgb
color
display unit
measuring
tristimulus
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CN110738957B (en
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吴俊昌
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Qisda Suzhou Co Ltd
Qisda Corp
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Qisda Suzhou Co Ltd
Qisda Corp
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2003—Display of colours
    • 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
    • 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
    • G01J3/506—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors measuring the colour produced by screens, monitors, displays or CRTs
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature

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  • General Physics & Mathematics (AREA)
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  • Color Image Communication Systems (AREA)

Abstract

The invention provides display systems and color characteristic measurement methods, the display system includes a display unit, a storage unit for storing related parameters of RGB three channels and second related parameters of the RGB three channels, a color measurement unit for measuring RGB tristimulus matrix of the display unit and measuring tristimulus value of the current color of the display unit, and a processing unit for obtaining three current output percentages of the RGB three channels according to the tristimulus value of the current color and the RGB tristimulus matrix, and obtaining three corrected output percentages of the RGB three channels according to the three current output percentages, the related parameters and the second related parameters.

Description

Display system and color characteristic measuring method
Technical Field
The invention relates to the technical field of display, in particular to display systems and a color characteristic measuring method.
Background
The use of advanced displays is becoming more and more as the user's demands for resolution of the display become higher, since advanced displays have a higher demand for accuracy of color characteristics, the color characteristics obtained using -like measuring devices have not met the need for color correction.
Therefore, it is necessary to design new display systems and color characterization measurement methods to overcome the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide display systems and color characteristic measurement methods, which can provide accurate color characteristics (and three correction output percentages of RGB three channels) for algorithm use without professional measurement equipment.
To achieve the above object, the present invention provides display systems, which comprises a display unit, a storage unit for storing related parameters of three RGB channels and second related parameters of the three RGB channels, a color measurement unit for measuring RGB tristimulus matrix of the display unit and measuring tristimulus values of the current color of the display unit, and a processing unit for obtaining three current output percentages of the three RGB channels according to the tristimulus values of the current color and the RGB tristimulus matrix, and obtaining three corrected output percentages of the three RGB channels according to the three current output percentages, the related parameters and the second related parameters.
Preferably, the color measurement unit measures a plurality of gray levels displayed by the display unit to obtain th tristimulus values corresponding to the gray levels, the th related parameter comprises th output percentages of the RGB three channels, and the th output percentages are obtained according to the th RGB tristimulus value matrix and the th tristimulus values.
Preferably, the color measurement unit measures a plurality of gray levels displayed by the display unit to obtain th tristimulus values corresponding to the gray levels, and the th related parameter includes the th tristimulus values.
Preferably, the display system further comprises a color measurement device for measuring a second RGB tristimulus value matrix of the display unit, the color measurement device measures a plurality of gray scales displayed by the display unit to obtain a plurality of second tristimulus values corresponding to the plurality of gray scales, the second correlation parameter comprises a plurality of second output percentages of the RGB three channels, and the plurality of second output percentages are obtained according to the second RGB tristimulus value matrix and the plurality of second tristimulus values.
Preferably, the display system further comprises a color measuring device for measuring a plurality of gray scales displayed by the display unit to obtain a plurality of second tristimulus values corresponding to the plurality of gray scales, and the second related parameter comprises the plurality of second tristimulus values.
Preferably, the storage unit stores a plurality of monochromatic spectrums of the RGB three channels of the display unit, and the processing unit obtains the spectrum of the display unit according to the three corrected output percentages and the plurality of monochromatic spectrums; or the storage unit stores the CIE standard tristimulus value matrix of the display unit, and the processing unit obtains the CIE standard tristimulus value coordinate according to the three correction output percentages and the CIE standard tristimulus value matrix.
In addition, the invention also provides color characteristic measuring methods, which comprises the following steps of providing related parameters of an RGB three channel and second related parameters of the RGB three channel, measuring a RGB tristimulus value matrix of a display unit by a color measuring unit, measuring a tristimulus value of the current color of the display unit, obtaining three current output percentages of the RGB three channel according to the tristimulus value of the current color and the RGB tristimulus value matrix, and obtaining three corrected output percentages of the RGB three channel according to the three current output percentages, the related parameters and the second related parameters.
Preferably, the -related parameters include output percentages of the RGB three channels, and the method further includes the steps of measuring a plurality of gray scales displayed by the display unit by the color measuring unit to obtain -th tristimulus values corresponding to the gray scales, and obtaining the -th output percentages according to the RGB tristimulus matrix and the -th tristimulus values.
Preferably, the -related parameter includes tristimulus values of gray scales, and the method further includes measuring the gray scales displayed by the display unit with the color measurement unit to obtain tristimulus values corresponding to the gray scales.
Preferably, the second correlation parameter includes a plurality of second output percentages of the RGB three channels, and the color characteristic measuring method further includes the steps of: measuring a second RGB tristimulus value matrix of the display unit by using color measuring equipment; measuring a plurality of gray scales displayed by the display unit by using the color measuring equipment to obtain a plurality of second tristimulus values corresponding to the plurality of gray scales; and obtaining the second output percentages according to the second RGB tristimulus value matrix and the second tristimulus values.
Preferably, the second correlation parameter includes a plurality of second tristimulus values corresponding to a plurality of gray scales, and the color characteristic measurement method further includes the steps of: and measuring the plurality of gray scales displayed by the display unit by using color measuring equipment to obtain the plurality of second tristimulus values corresponding to the plurality of gray scales.
Preferably, the method further comprises the following steps: measuring a plurality of monochromatic spectra of the RGB three channels of the display unit with a color measurement device; obtaining the spectrum of the display unit according to the three corrected output percentages and the plurality of monochromatic spectrums; or measuring the CIE standard tristimulus value matrix of the display unit by using color measuring equipment; and obtaining a CIE standard tristimulus value coordinate according to the three correction output percentages and the CIE standard tristimulus value matrix.
Compared with the prior art, the display system and the color characteristic measuring method provided by the invention store the related parameters and the second related parameters of the RGB three channels in the storage unit in advance, so that a user only needs to measure the tristimulus values of the current color of the display unit by using the color measuring unit (such as a color sensor), and the processing unit can obtain the three corrected output percentages of the RGB three channels according to the related parameters and the second related parameters of the RGB three channels.
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FIG. 1 is a functional block diagram of a display system according to an embodiment of the present invention;
fig. 2 is a flowchart of a color characteristic measurement method according to an embodiment of the present invention.
Detailed Description
In order to further the objects, structure, features and functions of the present invention , the following detailed description of the preferred embodiments is given.
It should be understood by those skilled in the art that elements may be referred to by different names, but the present specification and claims do not distinguish between elements by difference in name but rather by difference in function.
Referring to fig. 1, fig. 1 is a functional block diagram of a display system 1 according to an embodiment of the present invention, as shown in fig. 1, the display system 1 includes a display unit 10, a storage unit 12, a color measurement unit 14, and a processing unit 16, in this embodiment, the display system 1 may be a display including the display unit 10, the storage unit 12, the color measurement unit 14, and the processing unit 16, wherein the display unit 10 may include a display panel, the storage unit 12 may include a memory or other data storage device, the color measurement unit 14 may include a color sensor (color sensor), and the processing unit may include a processor or a controller having a data processing function, in another embodiment, the display system 1 may be a display including the display unit 10, the color measurement unit 14, and the processing unit 16, and the storage unit 12 may include a hard disk in communication with the display system 1, and the display may further include software and hardware components necessary for operation, such as an input/output port, an application program, a circuit board, a power supply, a communication module, and the like, depending on actual application.
The storage unit 12 may pre-store the th-related parameter of the RGB three channels and the second-related parameter of the RGB three channels, wherein RGB represents red, blue and green, respectively, in this embodiment, the th-related parameter may include th output percentages of the RGB three channels, and the second-related parameter may include second output percentages of the RGB three channels.
First, the present invention can measure the RGB tristimulus value matrix of the display unit 10 by the color measuring unit 14
Figure BDA0002204389500000051
Where XYZ represents the tristimulus values of RGB according to the embodiment, is a matrix of RGB tristimulus values
Figure BDA0002204389500000052
The data of (a) can be as shown in table 1 below.
TABLE 1
Figure BDA0002204389500000053
Figure BDA0002204389500000061
In addition, the present invention can measure a plurality of gray levels (for example, black and white gray levels 0 to 255) displayed by the display unit 10 by the color measurement unit 14 to obtain a plurality of th gray scale values (X Y Z) corresponding to the plurality of gray levels1st_Gray0～255According to the embodiment, multiple tristimulus values (X Y Z) corresponding to multiple gray levels1st_Gray0～255The data of (a) can be as shown in table 2 below.
TABLE 2
Gray scale (R,G,B) X Y Z
0 (0,0,0) 0.259105 0.288332 0.140232
4 (4,4,4) 0.300416 0.332734 0.161871
8 (8,8,8) 0.352968 0.38388 0.182104
… … … … …
132 (132,132,132) 23.22142 24.07074 10.51159
136 (136,136,136) 25 25.81934 11.27098
140 (140,140,140) 26.60871 27.48801 11.99041
144 (144,144,144) 28.28737 29.20663 12.72982
148 (148,148,148) 29.97602 30.92526 13.47922
152 (152,152,152) 31.6247 32.64388 14.21863
156 (156,156,156) 33.35332 34.43245 14.98801
… … … … …
248 (248,248,248) 89.38849 91.60671 40.43765
252 (252,252,252) 93.4952 95.78337 42.44604
255 (255,255,255) 98.58113 100.8393 45.02398
Next, a plurality of th output percentages (rg b) of RGB three channels1st_Gray0～255I.e. according to RGB Tri-stimulus matrix
Figure BDA0002204389500000071
And multiple th tristimulus values (X Y Z) corresponding to multiple gray levels1st_Gray0～255This is shown in the following equation 1.
Equation 1:
Figure BDA0002204389500000072
according to the embodiment, multiple output percentages of RGB three channels (r g b)1st_Gray0～255Therefore, the present invention can store a plurality of th output percentages of the RGB three channels in the comparison table shown in table 3 as the related parameters of the th RGB three channels in the storage unit 12 before the display is shipped.
TABLE 3
Figure BDA0002204389500000073
Figure BDA0002204389500000081
The plurality of second output percentages of the RGB three channels may be obtained in the following manner. First, the present invention can measure the second RGB tristimulus value matrix of the display unit 10 with the color measuring device 3 (e.g., color analyzer, spectrometer, etc.)
Figure BDA0002204389500000082
According to embodiment, the second RGB tristimulus matrix
Figure BDA0002204389500000083
The data of (a) can be as shown in table 4 below.
TABLE 4
(R,G,B) X Y Z
(255,0,0) 160.9958 80.17813 1.561817
(0,255,0) 50.64397 224.9995 5.95343
(0,0,255) 57.16974 19.9804 320.21
In addition, the present invention can measure a plurality of gray scales (for example, black and white gray scales 0 to 255) displayed by the display unit 10 by the color measuring device 3 to obtain a plurality of second tristimulus values (XYZ) corresponding to the plurality of gray scales2nd_Gray0～255 embodiment, a plurality of second tristimulus values (XYZ) corresponding to a plurality of gray levels2nd_Gray0～255The data of (a) can be as shown in table 5 below.
TABLE 5
Figure BDA0002204389500000084
Figure BDA0002204389500000091
Next, a plurality of second output percentages (rg b) of RGB three channels2nd_Gray0～255I.e. according to the second RGB tristimulus value matrix
Figure BDA0002204389500000092
And a plurality of second tristimulus values (X Y Z) corresponding to the plurality of gray levels2nd_Gray0～255This is obtained as shown in the following equation 2.
Equation 2:
Figure BDA0002204389500000093
according to the embodiment, a plurality of second output percentages (rg b) of RGB three channels2nd_Gray0～255The data of (a) can be as shown in table 6 below. Therefore, the present invention can store a plurality of second output percentages of the RGB three channels in the storage unit 12 as the comparison table shown in table 6 before the display leaves the factory, so as to serve as the second correlation parameters of the RGB three channels.
TABLE 6
Figure BDA0002204389500000101
When the user wants to use the display system 1 to measure the color characteristics of the display unit 10, the user can first measure the tristimulus values (XYZ) of the current color of the display unit 10 by the color measuring unit 14, according to the embodiment, the data of the tristimulus values (XYZ) of the current color can be as shown in table 7 below.
TABLE 7
Then, the processing unit 16 can obtain the tristimulus values (XYZ) of the current color and the RGB tristimulus value matrix
Figure BDA0002204389500000112
Get the three current output percentages of RGB three channels (r g b)C1As shown in the following equation 3.
Equation 3:
Figure BDA0002204389500000113
three current output percentages (rg b) for RGB three channels based on the data shown in tables 1 and 7C1The data of (a) can be as shown in table 8 below.
TABLE 8
Figure BDA0002204389500000114
Next, the processing unit 16 can output the percentage (rgb) according to the three current valuesC1 th correlation parameter (rgb)1st_Gray0～255Parameter associated with the second (r g b)2nd_Gray0～255Get the three corrected output percentages (r gb) of RGB three channelsC2. At the current output percentage rC1% for example, the processing unit 16 can see that 33.34% is between 31.98% (r) according to Table 3C1-low-bound) And 33.73% (r)C1-high-bound) And from tables 3 and 6, it is found that 31.98% and 33.73% in table 3 correspond to 30.76% (r) in table 6C2-low-bound) And 32.46% (r)C2-high-bound). Therefore, the corrected output percentage rC2The% can be calculated via interpolation as shown in the following equation 4.
Equation 4:
Figure BDA0002204389500000121
therefore, according to the data shown in tables 3, 6 and 8, the processing unit 16 can obtain the three corrected output percentages (RGB) of RGB three channelsC2As shown in table 9 below.
TABLE 9
Figure BDA0002204389500000122
In this embodiment, the storage unit 12 can further store a plurality of monochromatic spectra R (λ), G (λ), B (λ) of RGB three channels of the display unit 10. furthermore, , the present invention can measure a plurality of monochromatic spectra R (λ), G (λ), B (λ) of RGB three channels of the display unit 10 by the color measurement device 3, and store the plurality of monochromatic spectra R (λ), G (λ), B (λ) of RGB three channels in the storage unit 12 in advance, so that three corrected output percentages (rgbb) of RGB three channels are obtainedC2Thereafter, the processing unit 16 outputs a percentage (r g b) based on the three correctionsC2The spectrum I (λ) of the display unit 10 is obtained from the plurality of monochromatic spectra R (λ), G (λ), and B (λ), as shown in the following formula 5.
Equation 5: i (λ) ═ rC2*R(λ)+gC2*G(λ)+bC2*B(λ)。
In another embodiment, the storage unit 12 can further store the CIE Tristimulus matrix of the display unit 10The CIE standard tristimulus values can be CIE1931 XYZ at 2 degree viewing angle, CIE2015XYZ at 10 degree viewing angle or defined by other CIE, it is noted that CIE is short for the Commission International de L' Eclairage, and step , the present invention can measure the CIE standard tristimulus value matrix of the display unit 10 by the color measuring device 3
Figure BDA0002204389500000131
And using the CIE standard tristimulus value matrix
Figure BDA0002204389500000132
Is stored in the storage unit 12 in advance. Thus, three corrected output percentages (rg b) in RGB three channels are obtainedC2Thereafter, the processing unit 16 outputs the percentage (r g b) according to the three correctionsC2And CIE standard tristimulus value matrix
Figure BDA0002204389500000133
Obtaining CIE standard tristimulus value coordinate (X Y Z)CIEAs shown in the following equation 6.
Equation 6:
Figure BDA0002204389500000134
therefore, the invention can output three corrected percentages (rg b) of RGB three channelsC2For calculating the spectrum I (λ) of the display unit 10 and/or for calculating the CIE Standard Tri-stimulus value coordinates (X Y Z)CIE。
In another embodiment, the related parameters may only include third-stimulus values (X Y Z) corresponding to gray levels1st_Gray0～255The second correlation parameter may only include a plurality of second tristimulus values (X Y Z) corresponding to a plurality of gray levels2nd_Gray0～255. Word changing deviceMoreover, the storage unit 12 may previously store a plurality of Tri-stimulus values (X YZ) as shown in Table 21st_Gray0～255With a plurality of second tristimulus values (X Y Z) as shown in Table 52nd_Gray0～255In this embodiment, the processing unit 16 may first generate a plurality of th quick values (X Y Z)1st_Gray0～255With a plurality of second tristimulus values (X Y Z)2nd_Gray0～255Respectively converted into a plurality of th output percentages (r g b)1st_Gray0～255With a plurality of second output percentages (r g b)2nd_Gray0～255Then, the three corrected output percentages (rg b) of RGB three channels are obtained according to the above modeC2。
In another embodiment, the present invention can also use the color measurement unit 14 to measure a plurality of RGB single color gray scales (e.g., red gray scales 0-255, green gray scales 0-255, and blue gray scales 0-255) displayed by the display unit 10 to obtain a plurality of tristimulus values (X Y Z) corresponding to the RGB single color gray scales1st_Red0～255、(X Y Z)1st_Green0～255、(X YZ)1st_Blue0～255According to embodiment, multiple tristimulus values (X Y Z) corresponding to multiple RGB monochrome grayscales1st_Red0～255、(X Y Z)1st_Green0～255、(X Y Z)1st_Blue0～255The data of (a) can be as shown in tables 10 to 12 below.
Watch 10
Gray scale (Red) (R,G,B) X Y Z
0 (0,0,0) 0.251237 0.244773 0.111005
4 (4,0,0) 0.278777 0.257138 0.110724
8 (8,0,0) 0.308566 0.271189 0.112972
… … … … …
132 (132,0,0) 18.21976 8.344646 0.44455
136 (136,0,0) 19.6025 8.963738 0.457816
140 (140,0,0) 20.96 9.569118 0.495088
144 (144,0,0) 22.3721 10.22182 0.519584
148 (148,0,0) 23.77098 10.84133 0.539568
152 (152,0,0) 25.19984 11.48081 0.569544
156 (156,0,0) 26.6287 12.1303 0.579536
… … … … …
248 (248,0,0) 69.98401 31.63469 1.368905
252 (252,0,0) 72.57194 32.81375 1.428857
255 (255,0,0) 75.46962 34.10272 1.478817
TABLE 11
Gray scale (Green) (R,G,B) X Y Z
0 (0,0,0) 0.251237 0.243087 0.111286
4 (0,4,0) 0.259386 0.26866 0.112129
8 (0,8,0) 0.267536 0.293671 0.118312
… … … … …
132 (0,132,0) 6.105116 17.55595 1.249001
136 (0,136,0) 6.544764 18.8749 1.358913
140 (0,140,0) 6.994404 20.19384 1.438849
144 (0,144,0) 7.454037 21.53277 1.518785
148 (0,148,0) 7.893685 22.85172 1.618705
152 (0,152,0) 8.373302 24.20064 1.708633
156 (0,156,0) 8.832933 25.57954 1.788569
… … … … …
248 (0,248,0) 22.36211 65.39768 4.496403
252 (0,252,0) 23.15148 67.71583 4.646283
255 (0,255,0) 24.01079 70.34373 4.816147
TABLE 12
Figure BDA0002204389500000151
Figure BDA0002204389500000161
Next, multiple th output percentages of RGB three channels (r- -)1st_Red0～255、(- g -)1st_Green0～255、(- - b)1st_Blue0～255I.e. according to RGB Tri-stimulus matrix
Figure BDA0002204389500000162
And Tri-stimulus values (XYZ) corresponding to RGB monochrome gray scales1st_Red0～255、(X Y Z)1st_Green0～255、(X Y Z)1st_Blue0～255Obtained as shown in the following equations 7 to 9.
Equation 7:
Figure BDA0002204389500000163
equation 8:
Figure BDA0002204389500000164
equation 9:
Figure BDA0002204389500000165
according to the embodiment, multiple th output percentages of RGB three channels (r- -)1st_Red0～255、(- g-)1st_Green0～255、(- - b)1st_Blue0～255Therefore, the present invention can store a plurality of th output percentages of the RGB three channels in the comparison table shown in table 13 as the related parameters of the th RGB three channels in the storage unit 12 before the display is shipped.
Watch 13
Figure BDA0002204389500000171
In addition, the present invention can also measure a plurality of RGB single color gray scales (e.g., red gray scales 0-255, green gray scales 0-255 and blue gray scales 0-255) displayed by the display unit 10 by the color measurement device 3 to obtain a plurality of second tristimulus values (X Y Z) corresponding to the plurality of RGB single color gray scales2nd_Red0～255、(X Y Z)2nd_Green0～255、(X Y Z)2nd_Blue0～255A plurality of second tristimulus values (X Y Z) corresponding to a plurality of RGB monochrome gray levels according to 2nd_Red0～255、(X Y Z)2nd_Green0～255、(XY Z)2nd_Blue0～255The data of (a) can be as shown in tables 14 to 16 below.
TABLE 14
Figure BDA0002204389500000181
Figure BDA0002204389500000191
Watch 15
Gray scale (Green) (R,G,B) X Y Z
0 (0,0,0) 0.286596 0.286884 0.4606
4 (0,4,0) 0.310162 0.371116 0.468773
8 (0,8,0) 0.337372 0.467955 0.477931
… … … … …
132 (0,132,0) 18.27784 64.471 6.73974
136 (0,136,0) 19.66443 69.39845 7.224806
140 (0,140,0) 21.03874 74.31886 7.707205
144 (0,144,0) 22.45744 79.38222 8.205156
148 (0,148,0) 23.859 84.37354 8.692875
152 (0,152,0) 25.28569 89.45961 9.190222
156 (0,156,0) 26.72382 94.59324 9.696495
… … … … …
248 (0,248,0) 69.74236 248.1909 24.84121
252 (0,252,0) 72.33975 257.506 25.76495
255 (0,255,0) 75.26826 267.9994 26.83249
TABLE 16
Figure BDA0002204389500000192
Figure BDA0002204389500000201
Next, a plurality of second output percentages (r- -) of the RGB three channels2nd_Red0～255、(- g -)2nd_Green0～255、(- - b)2nd_Blue0～255I.e. according to the second RGB tristimulus value matrix
Figure BDA0002204389500000202
And a plurality of second tristimulus values (X Y Z) corresponding to the plurality of RGB monochrome gray levels2nd_Red0～255、(X Y Z)2nd_Green0～255、(X Y Z)2nd_Blue0～255Obtained as shown in the following equations 10 to 12.
Equation 10:
Figure BDA0002204389500000203
equation 11:
Figure BDA0002204389500000211
equation 12:
Figure BDA0002204389500000212
according to the embodiment, a plurality of second output percentages (r- -) of RGB three channels2nd_Red0～255、(- g-)2nd_Green0～255、(- - b)2nd_Blue0～255The data of (a) can be shown in table 17 below. Therefore, the present invention can store a plurality of second output percentages of the RGB three channels in the storage unit 12 as the comparison table shown in table 17 before the display leaves the factory, so as to serve as the second correlation parameters of the RGB three channels.
TABLE 17
Figure BDA0002204389500000213
Therefore, the th and second correlation parameters of the RGB three channels can be obtained according to the black and white gray scale 0-255 or the RGB single color gray scale 0-255, depending on the practical application, furthermore, the th and second correlation parameters of the RGB three channels obtained according to the RGB single color gray scale 0-255 can also be used for obtaining the three corrected output percentages (RGB) of the RGB three channels according to the above wayC2Is no longer present hereThe description is given.
Referring to fig. 2, fig. 2 is a flowchart of a color characteristic measurement method according to an embodiment of the present invention, the color characteristic measurement method in fig. 2 is suitable for the display system 1 in fig. 1, first, step S10 is executed to provide a th related parameter of RGB three channels and a second related parameter of RGB three channels, the th related parameter and the second related parameter of RGB three channels can be obtained according to black and white gray scales 0-255 or RGB single gray scales 0-255, and detailed description is omitted as above, and then step S12 is executed to measure a th RGB triple-tone matrix of the display unit 10 by the color measurement unit 14And measures the tristimulus value (xyz) of the current color of the display unit 10, then, step S14 is performed according to the tristimulus value (xyz) of the current color and the RGB tristimulus value matrix
Figure BDA0002204389500000223
Get the three current output percentages (rg b) of RGB three channelsC1. Step S16 is executed, according to the three current output percentages (r g b)C1 th correlation parameter and the second correlation parameter to obtain three corrected output percentages (rg b) of RGB three channelsC2。
It should be noted that the detailed embodiment of the color characteristic measuring method of the present invention is described above, and is not described herein again. In addition, each part or function in the control logic of the color characteristic measurement method of the present invention can be realized by a combination of software and hardware.
In summary, the present invention stores the related parameters and the second related parameters of the RGB three channels in the storage unit in advance, so that the processing unit can obtain the three corrected output percentages of the RGB three channels according to the related parameters and the second related parameters of the RGB three channels by using the color measuring unit (e.g., the color sensor), in the embodiment, the three corrected output percentages of the RGB three channels can be used to obtain the spectrum of the display unit, in the embodiment, the three corrected output percentages of the RGB three channels can be used to obtain the CIE standard three stimulus coordinates.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.

Claims (12)

1, A display system, comprising:
a display unit;
a storage unit for storing th related parameters of RGB three channels and second related parameters of the RGB three channels;
a color measuring unit for measuring RGB tristimulus matrix of the display unit and measuring tristimulus values of the current color of the display unit, an
And a processing unit for obtaining three current output percentages of the RGB three channels according to the tristimulus values of the current color and the RGB tristimulus value matrix, and obtaining three corrected output percentages of the RGB three channels according to the three current output percentages, the related parameters and the second related parameters.
2. The display system of claim 1, wherein the color measurement unit measures a plurality of gray levels displayed by the display unit to obtain th tristimulus values corresponding to the gray levels, the -related parameters comprise th output percentages of the RGB three channels, and the th output percentages are obtained according to the RGB tristimulus matrix and the th tristimulus values.
3. The display system of claim 1, wherein the color measurement unit measures a plurality of gray levels displayed by the display unit to obtain th tristimulus values corresponding to the gray levels, and the -th related parameter comprises the th tristimulus values.
4. The display system as claimed in claim 1, wherein the display system further comprises a color measurement device for measuring a second RGB Tri-stimulus matrix of the display unit, the color measurement device measuring a plurality of gray levels displayed by the display unit to obtain a plurality of second Tri-stimulus values corresponding to the plurality of gray levels, the second correlation parameter comprises a plurality of second output percentages of the RGB tri-stimulus matrix, and the plurality of second output percentages are obtained according to the second RGB Tri-stimulus matrix and the plurality of second Tri-stimulus values.
5. The display system of claim 1, further comprising a color measurement device for measuring a plurality of gray levels displayed by the display unit to obtain a plurality of second tristimulus values corresponding to the plurality of gray levels, wherein the second related parameter comprises the plurality of second tristimulus values.
6. The display system as claimed in claim 1, wherein the storage unit stores a plurality of monochromatic spectra of the RGB three channels of the display unit, and the processing unit obtains the spectrum of the display unit according to the three corrected output percentages and the plurality of monochromatic spectra; or
The storage unit stores a CIE standard tristimulus value matrix of the display unit, and the processing unit obtains a CIE standard tristimulus value coordinate according to the three correction output percentages and the CIE standard tristimulus value matrix.
7, color characterization measurement method, the method comprising the steps of:
providing th related parameters of RGB three channels and second related parameters of the RGB three channels;
measuring RGB tristimulus matrix of the display unit by a color measuring unit, and measuring tristimulus value of the current color of the display unit;
obtaining three current output percentages of the RGB three channels according to the Tri-stimulus value of the current color and the RGB Tri-stimulus value matrix, and
and obtaining three corrected output percentages of the RGB three channels according to the three current output percentages, the -th correlation parameter and the second correlation parameter.
8. The color characterization method of claim 7 wherein the -related parameters include a plurality of output percentages of the RGB three channels, the color characterization method further comprising the steps of:
measuring multiple gray scales displayed by the display unit with the color measuring unit to obtain multiple th tristimulus values corresponding to the gray scales
Obtaining the th output percentages according to the RGB tristimulus matrix and the th tristimulus values.
9. The method of claim 7, wherein the -th related parameter comprises a plurality of tristimulus values of gray levels, the method further comprising:
the color measuring unit is used for measuring the gray scales displayed by the display unit to obtain th tristimulus values corresponding to the gray scales.
10. The color characterization measurement method of claim 7 wherein the second correlation parameter comprises a plurality of second output percentages of the RGB three channels, the color characterization measurement method further comprising the steps of:
measuring a second RGB tristimulus value matrix of the display unit by using color measuring equipment;
measuring a plurality of gray scales displayed by the display unit by using the color measuring equipment to obtain a plurality of second tristimulus values corresponding to the plurality of gray scales; and
and obtaining the second output percentages according to the second RGB tristimulus value matrix and the second tristimulus values.
11. The method of claim 7, wherein the second correlation parameter comprises a plurality of second tristimulus values corresponding to a plurality of gray levels, the method further comprising:
and measuring the plurality of gray scales displayed by the display unit by using color measuring equipment to obtain the plurality of second tristimulus values corresponding to the plurality of gray scales.
12. The color characteristic measurement method according to claim 7, further comprising the steps of:
measuring a plurality of monochromatic spectra of the RGB three channels of the display unit with a color measurement device; and
obtaining the spectrum of the display unit according to the three corrected output percentages and the plurality of monochromatic spectrums; or
Measuring a CIE standard tristimulus value matrix of the display unit by using color measuring equipment; and
and obtaining a CIE standard tristimulus value coordinate according to the three correction output percentages and the CIE standard tristimulus value matrix.
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