CN107622744A - A kind of visual testing method of liquid crystal television screen colorimetric properties - Google Patents
A kind of visual testing method of liquid crystal television screen colorimetric properties Download PDFInfo
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- CN107622744A CN107622744A CN201710725653.XA CN201710725653A CN107622744A CN 107622744 A CN107622744 A CN 107622744A CN 201710725653 A CN201710725653 A CN 201710725653A CN 107622744 A CN107622744 A CN 107622744A
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Abstract
The invention discloses a kind of visual testing method of liquid crystal television screen colorimetric properties, and CIE1931 X Y are transformed into CIE1931 colour RGB color degree coordinate systems using transformation relation formula in analysis tool, and using its chromatic diagram as background；Using color analysis instrument acquisition R is red, G is green, X, Y chromaticity coordinates data of blue three colors of B；Analysis tool generates the chromatic triangle of standard screen using tri- color coordinates of R, G, B as summit；Analysis tool generates the chromatic triangle of screen to be analyzed using tri- color coordinates of R, G, B as summit；The colourity comparative analysis figure of formation is shown in CIE1931 colour RGB color degree coordinate systems.Compared with prior art, the present invention can quickly analyze the colorimetric properties change of flat-panel monitor, even if not being specialty optics personnel, can also differentiate the difference of flat-panel monitor colorimetric properties and standard state, effect is direct, image, is compensated beneficial to corresponding optics image quality is carried out.
Description
Technical field
The present invention relates to the Performance Testing Technology of intelligent digital video terminal, more particularly to a kind of liquid crystal television screen colourity are special
The visual testing method of property.
Background technology
For flat-panel monitor as Message Display Terminal, its optical characteristics is very important technical indicator.Photoelectric material
Change, the parameter setting of television set finally can all directly affect the image quality effect of tv product.
During actual debugging, the optical characteristics for detecting LCDs is extremely complex：After testing the chromaticity coordinates of liquid crystal display,
Parameter can not intuitively reflect the optical index of complete machine change, it is necessary to designer test data is carried out equation calculating,
Parameter analysis, chart compare, could clearly；When optical parametric compares, if without rich experiences, general is difficult to find out optical differences
It is different.
Such as：Liquid crystal display optical characteristics is tested, red, green, blue field picture is inputted first and tests electrical parameter respectively, pass through colourity
Rx, Ry, Yr, Gx, Gy, Yg, Bx, By, Yb coordinate that tester obtains, coordinate and the brightness of the colors of RGB tri- is shown in they
Data.Because can not directly find out the situation of change of optical parametric, it is necessary to which electrical parameter is gone to calculate by equation：
X=0.490Rx+0.310Gx+0.200Bx
Y=0.177Rx+0.812Gy+0.011By
X-Y color hue coordinate system of the data coordinates in CIE1931 is compared again after calculating, liquid crystal display could be analyzed
The optical color of certain point, brightness, the situation of color domain coverage ratio.Such as following table
Layman infers that the optical index of display device cannot change by test data, other shortcoming warps
The professional and technical personnel tested also can not influence of the analytical parameters to image quality, corresponding compensation is carried out to bad optical index and is also had no way of
Talk.
The content of the invention
The purpose of the present invention, which is that, provides a kind of visualization for the liquid crystal television screen colorimetric properties for solving above mentioned problem
Method of testing, tester can go out the change direction of optical index according to test parameter rapid inference, convenient corresponding in complete machine
Electrical parameter on recompense.
To achieve these goals, the technical solution adopted by the present invention is：A kind of liquid crystal television screen colorimetric properties it is visual
Change method of testing,
A. correction data based on chromaticity coordinates system colored importing international standard CIE1931 in analysis tool, profit
CIE1931 X-Y color hue coordinate systems are transformed to CIE1931 colour RGB color degree coordinate systems with transformation relation formula, and with it
Chromatic diagram is background；
B. the R that obtains the through connect signal of standard liquid crystal display and liquid crystal display to be analyzed using color analysis instrument is red, G is green, B blue three
X, Y chromaticity coordinates data of color；
C. the data of X, Y color coordinate of the red, green, blue of standard liquid crystal display are imported into analysis tool first, analysis tool with
R, tri- color coordinates of G, B are the chromatic triangle that summit generates standard screen；Switched to when chromatic triangle coordinate system background
During CIE1931 colour RGB color degree coordinate systems, so that it may the change of colorimetric properties is directly observed with eyes
D. X, Y color coordinate for being analysed to the red, green, blue of liquid crystal display again import analysis tool, and analysis tool is with R, G, B tri-
Individual color coordinates is the chromatic triangle that summit generates screen to be analyzed；
E. the chromatic triangle of standard screen and screen to be analyzed is overlapped contrast, and in CIE1931 colour RGB color degree seats
The colourity comparative analysis figure that display is formed in mark system.
Preferably, in step a, x, y of the coordinate of RGB color degree coordinate system and CIE1931 X-Y color hue coordinate systems
Coordinate is into 1:1 relation.
Preferably, analysis tool generation chromatic triangle mode is, it is assumed that liquid crystal display optical characteristics is uniform, works as liquid crystal display
During the image of display standard red (R=255, G=0, B=0), Rx, Ry for testing any point on liquid crystal display are exactly liquid crystal display color
Spend the Red vertices of triangle；The rest may be inferred by analogy obtains blue apex (G=255, R=0, B=0), Green vertices (G=255, R=
0, B=0) coordinate, line obtain the liquid crystal display chromatic triangle.
Can be approximately the colourity of liquid crystal display preferably, when forming triangle as summit using tri- color coordinates of R, G, B
Triangle, triangle inner region can be approximately the color domain coverage ratio of the liquid crystal display.
Compared with prior art, the advantage of the invention is that：The color of flat-panel monitor can be quickly analyzed using this programme
Characteristic variations are spent, even if not being specialty optics personnel, can also differentiate the difference of flat-panel monitor colorimetric properties and standard state, are imitated
Fruit is direct, image, and corresponding optics image quality compensation is carried out to flat-panel monitor beneficial to debugging, designer is instructed.
Brief description of the drawings
Fig. 1 is the chromatic triangle output figure of the present invention；
The triangle pair that Fig. 2 is the present invention is schemed than output；
Fig. 3 is the colourity comparative analysis figure of the present invention.
Embodiment
The invention will be further described below.
Embodiment 1：A kind of visual testing method of liquid crystal television screen colorimetric properties, writes analysis tool, in work first
The colored chromaticity coordinates systems of international standard CIE1931 are imported in tool；Tools interfaces are shown in accompanying drawing 1；The flat board of testing standard state shows
Show X, Y chromaticity coordinates of device red, green, blue, parameter is imported by tools interfaces；It is exportable to be based on by analysis tool
The chromatic triangle of CIE1931 chromatic diagrams, figure shows are shown in accompanying drawing 2；The red, green, blue of re-test flat-panel monitor to be analyzed
X, Y color coordinate, import data to testing tool；Export the changes in contrast figure of chromatic triangle：By standard indicator and treat point
The colorimetric properties triangle of analysis display carries out contrast and shown (see accompanying drawing 3)；Fasten, fold in the colored chromaticity coordinates of CIE1931
Add the changes in contrast figure of display chromatic triangle --- the colorimetric properties change of quick visualization analysis flat-panel monitor.
Applied to the comparison for two liquid crystal display supplied with Samsung, specific embodiment is：
Two LCD TV supplied using Samsung, screen type number are respectively LTA320AN01-C and LTA320AN01-
D.They in addition to luminance difference, other are all consistent：The LTA320AN01-C nit of brightness 400, LTA320AN01-C's is bright
Spend 350 nits, such as following table.
We using the matching of same machine core board test the colorimetric properties of LCD TV
1st, using color analysis instrument CHROMA7123, using same set of liquid crystal complete machine, test respectively uses two kinds of liquid crystal displays
Complete machine through connect signal R it is red, G is green, X, Y chromaticity coordinates of blue three colors of B, import data to colorimetric analysis instrument, see accompanying drawing 2；
2nd, standard screen test data is imported using this programme, firstly generates the chromatic triangle of standard screen, see accompanying drawing 1；Have
The personnel of optical design experience, can be by this figure it may determine that going out the electric compensation direction of LCD TV.
3rd, the optic test data of comparative liquid crystal screen are imported, generate chromatic triangle comparison diagram；See accompanying drawing 2
4th, colourity comparative analysis figure of the generation in 1931 chromaticity coordinates, is shown in accompanying drawing 3；
5th, by colorimetric analysis figure, common test personnel can have found the chromaticity coordinates of LTA320AN01-D liquid crystal displays green
Vary widely, the spectrum for causing white is offset to green direction, explanation：
(1) LTA320AN01-D colorimetric properties variation tendency is to mix green light spectrum in white.
(2) corresponding electrical parameter should suitably reduce green gain, and the green vividness after debugging will about reduce by 10%；
The LTA320AN01-C of state before this batch of liquid crystal display can not replace it.
Confirm through final, Samsung producer causes the colorimetric properties of liquid crystal display to change, cause liquid because cost factor changes fluorescent tube
The image quality characteristic of brilliant television set is a greater impact, and debugs even across image quality, still occurs：Start never call image quality parameter
When, adapted LTAN320AN01-D liquid crystal TV set white will integral color it is partially green；First wife's liquid crystal display LTA320AN01-C's
LCD TV white colours are normal, and the vividness of green will be high by 10% compared with-D liquid crystal display.
Specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said
It is bright to be only intended to help the method and its core concept for understanding the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, in specific embodiments and applications there will be changes, change and improvement to the present invention are incited somebody to action
It is possible, without the spirit and scope beyond accessory claim defined, in summary, this specification content should not manage
Solve as limitation of the present invention.
Claims (4)
- A kind of 1. visual testing method of liquid crystal television screen colorimetric properties, it is characterised in that：A. correction data based on chromaticity coordinates system colored importing international standard CIE1931 in analysis tool, utilizes change Change relational expression and CIE1931 X-Y color hue coordinate systems are transformed to CIE1931 colour RGB color degree coordinate systems, and with its colourity Figure is background；B. the R that obtains the through connect signal of standard liquid crystal display and liquid crystal display to be analyzed using color analysis instrument is red, G is green, blue three colors of B X, Y chromaticity coordinates data；C. the data of X, Y color coordinate of the red, green, blue of standard liquid crystal display are imported into analysis tool first, analysis tool is with R, G, B Three color coordinates are the chromatic triangle that summit generates standard screen；D. X, Y color coordinate for being analysed to the red, green, blue of liquid crystal display again import analysis tool, and analysis tool is with tri- face of R, G, B Chromaticity coordinates is the chromatic triangle that summit generates screen to be analyzed；E. the chromatic triangle of standard screen and screen to be analyzed is overlapped contrast, and in CIE1931 colour RGB color degree coordinate systems The colourity comparative analysis figure that interior display is formed.
- A kind of 2. visual testing method of liquid crystal television screen colorimetric properties according to claim 1, it is characterised in that：Step In rapid a, x, y coordinate of the coordinate of RGB color degree coordinate system and CIE1931 X-Y color hue coordinate systems is into 1:1 relation.
- A kind of 3. visual testing method of liquid crystal television screen colorimetric properties according to claim 1, it is characterised in that：Point Analysis instrument generates chromatic triangle mode, it is assumed that liquid crystal display optical characteristics is uniform, when liquid crystal display shows standard red (R=255, G =0, B=0) image when, test liquid crystal display on any point Rx, Ry be exactly liquid crystal display chromatic triangle Red vertices； The rest may be inferred by analogy obtains blue apex (G=255, R=0, B=0), the coordinate of Green vertices (G=255, R=0, B=0), line Obtain the liquid crystal display chromatic triangle.
- A kind of 4. visual testing method of liquid crystal television screen colorimetric properties according to claim 3, it is characterised in that：When Can be approximately the chromatic triangle of liquid crystal display when forming triangle by summit of tri- color coordinates of R, G, B, triangle inner region It can be approximately the color domain coverage ratio of the liquid crystal display.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110662022A (en) * | 2019-09-29 | 2020-01-07 | 京东方科技集团股份有限公司 | Color gamut adjusting system and color gamut adjusting method |
| CN110890057A (en) * | 2019-12-06 | 2020-03-17 | 长春希达电子技术有限公司 | LED display screen color matching method based on chromaticity coordinate grading mixing |
| CN112599072A (en) * | 2019-09-18 | 2021-04-02 | 群燿光学股份有限公司 | Light color change area display system and display method thereof |
| CN113270054A (en) * | 2021-05-17 | 2021-08-17 | 京东方科技集团股份有限公司 | Image quality detection of display equipment, image quality detection report generation method and device equipment |
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| CN112599072A (en) * | 2019-09-18 | 2021-04-02 | 群燿光学股份有限公司 | Light color change area display system and display method thereof |
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