CN105404032B - A method of for detecting the colour cast situation of display device - Google Patents
A method of for detecting the colour cast situation of display device Download PDFInfo
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- CN105404032B CN105404032B CN201510932957.4A CN201510932957A CN105404032B CN 105404032 B CN105404032 B CN 105404032B CN 201510932957 A CN201510932957 A CN 201510932957A CN 105404032 B CN105404032 B CN 105404032B
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- color
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
Abstract
Present applicant proposes a kind of methods for detecting the colour cast situation of display device, comprising: selects a kind of color to be measured from three kinds of pixel colors of red, green, blue；So that the display picture of display to be measured only shows the color to be measured；Optical filter is set between display to be measured and the eyes of observer, so that from the light for showing picture via the eyes for entering observer after the optical filter, and the optical filter only can be through the non-color to be measured of one of three kinds of pixel colors of red, green, blue；Through optical filter observation display picture under visual angle to be measured.The scheme of the application is successfully realized, and replaces color to identify by brightness judgement, to judge whether panel has big visual angle colour cast.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of methods for detecting the colour cast situation of display device.
Background technique
Display or laptop in the application of present liquid crystal display device, either mobile terminal of mobile telephone, table, all
Develop progressively towards the direction of wide viewing angle.But except the demand of wide viewing angle, while it there is also a need for improving big visual angle colour cast problem.
This is because people increasingly pay close attention to the quality of display picture with the progress of display technology.In particular, mobile phone screen display
Resolution ratio (ppi) it is increasing, from 200ppi before, 300ppi or more till now.More with resolution ratio (ppi)
Do bigger, Pixel Dimensions are smaller and smaller, and it is considered from power consumption and brightness angle and requires to guarantee that pixel has certain penetrance, because
The black matrix" (BM) of this pixel is more and more narrow.Black matrix" (BM) is relatively narrow, then easily causes between the adjacent pixel of visual angle each other
" optical crosstalk " will cause colour cast under big visual angle.Big visual angle colour cast problem has attracted more and more attention from people.
There are many origin causes of formation of big visual angle colour cast.However, largely, one of the reason of leading to big visual angle colour cast is display
The visual angle adjacent pixel light leakage of pixel influences the purity of display pixel color.Fig. 1, which is shown, to be occurred in display device under big visual angle
The case where when color offset phenomenon.As shown in Figure 1, display generally includes the first glass substrate 1, tft array 2, sandwiching liquid crystal 3, auxiliary
Help optical film layer 4, color blocking layer (including red color resistance 5 and green color blocking 6), black matrix" 30 and the second glass substrate 7.Red picture
Element 5 is bright, and green pixel 6 is closed.But when watching red picture, the light in such as 8,9 directions is had from red in big view directions
5 light leakage of color pixel, can be partially yellow so as to cause color when watching red picture to green pixel 6.Black matrix" (BM) 10 do it is narrow etc. because
Element causes big visual angle downwards angle of visibility adjacent pixel light leakage to increase, and becomes serious so as to cause big visual angle colour cast.
Therefore, it is badly in need of a kind of method of colour cast situation for being accurately effectively used for detection display device.
Summary of the invention
For above-mentioned the problems of the prior art, present applicant proposes a kind of for detecting the colour cast situation of display device
Method.
Present applicant proposes a kind of methods for detecting the colour cast situation of display device, comprising: selects from display color
Select at least one color to be measured；So that the display picture of display to be measured only shows the color to be measured；In display to be measured and
Optical filter is set between the eyes of observer so that from it is described display picture light via after the optical filter enter observation
The eyes of person, and the optical filter can only penetrate non-color to be measured；It is aobvious through optical filter observation under visual angle to be measured
Show picture.
When human eye watches pure color picture under big visual angle, the light of color to be measured is blocked by color blocking device, (if there is leakage
Light) only have the light from other pixels leaked out can be by color blocking device, (if there is light leakage) human eye can be seen at this time
Observe low-light level picture.Human eye is higher compared with color to the sensibility of low gray-scale intensity, and the previous case is easier to identify, therefore
The method is taken to more easily determine whether colour cast occurs and the color and type of colour cast.
In one embodiment, the optical filter is configured with the sheet body of color blocking.Color blocking piece is set by optical filter
Structure, in conjunction with the display screen with display.
In one embodiment, so that the optical filter include substrate and even spread on the substrate for spy
The long photoresist of standing wave.
In one embodiment, in the color blocking of the optical filter and display to be measured with the pixel with color to be measured
The color blocking of the adjacent pixel in visual angle is identical.It can so be screened especially for the light leakage of visual angle adjacent pixel.
In one embodiment, the transmission region of the color blocking of optical filter is located at and the pixel visual angle phase with color to be measured
In the transmission region of the color blocking of adjacent pixel, and only take part of it wave band.By this method, leakage can more targetedly be detected
Light.
In order to more completely judge entirely to show the colour cast situation of screen, the size of the sheet body preferably with it is described to be measured aobvious
Show that the display screen size of device is identical.Meanwhile detection process itself generates between the different zones of display screen curtain in order to prevent
The display screen of the sheet body and the display to be measured can be placed in parallel by difference when being detected.Further, it is
Prevent extraneous light from causing error to detection, it when being detected, can be by the display of the sheet body and the display to be measured
The fitting of screen gapless is placed.
In another embodiment, the sheet body is less than the display screen size of display, holds sheet body, uses sheet body
Close to human eye and observation is blocked, or is moved over the display using the sheet body for the display screen size for being less than display, to see
Examine the serious display of the big visual angle colour cast in part.
In one embodiment, when display pattern is RGB, color to be measured is selected as red, so that the optical filtering
Device is only capable of through one of green light or blue light；Or color to be measured is selected as blue, so that the optical filter is only capable of penetrating
One of green light or feux rouges；Or color to be measured is selected as green, so that the optical filter is only capable of through blue light or feux rouges
One of.
In yet another embodiment, when display pattern is RGB, color to be measured is selected as two in tri- kinds of colors of RGB
The mixing of kind color, and the color blocking light transmission color of optical filter is selected as other one non-color to be measured.
In another embodiment, it when display pattern is RGBW or RGBY, sets optical filter to through respective mode
The light of one of color of the four primary of formula, and color to be measured is then selected as one or more of other colors.
Above-mentioned technical characteristic may be combined in various suitable ways or be substituted by equivalent technical characteristic, as long as can reach
To the purpose of the present invention.
Detailed description of the invention
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.Wherein:
Fig. 1 shows that there is a situation where under big visual angle when color offset phenomenon in display device；
Fig. 2 shows the ideal situation under big visual angle without colour cast；
Fig. 3 shows that there is a situation where local colour casts under big visual angle；
Fig. 4 shows that there is a situation where globality colour casts under big visual angle；
Fig. 5 shows a kind of embodiment of method of the invention；
Fig. 6 shows the embodiment of the designed method as comparative example.
In the accompanying drawings, identical component uses identical appended drawing reference.Attached drawing is not according to actual ratio.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
Fig. 2 shows the ideal situation under big visual angle without colour cast.In Fig. 2, it is exemplified as drawing using LOOK RIGHT viewing is red
Face.It is shown in Fig. 2 ideally, observer is observed to be pure red picture.
Fig. 3 shows that there is a situation where local colour casts under big visual angle.In Fig. 3, it is exemplified as red using LOOK RIGHT viewing
Picture.In actual state, it some times happens that the case where part colour cast shown in Fig. 3, the mostly color displacement as caused by light leakage.
In this situation, there is the display picture at some position apparent color difference (to have in figure by the exemplary mark of hatching
The position of color difference).For inspection personnel, human eye can relatively easily observe this local colour cast, because it shows as
The display picture at some position is obviously abnormal.
Fig. 4 shows that there is a situation where globality colour casts under big visual angle.In Fig. 4, it is exemplified as watching using LOOK RIGHT red
Color picture.In actual state, it some times happens that the case where globality colour cast shown in Fig. 4.It is whole in situation shown in Fig. 4
A big visual angle colour cast of the comprehensive generation of panel.And for inspection personnel, it generally can not easily observe shown in Fig. 4 whole
The big visual angle colour cast of body.
Meanwhile in the actual production process, inspection personnel insufficient time judges color displacement degree and offset
Which kind of color is type (be biased to).In order to make inspection personnel convenient and promptly check whether panel has serious big visual angle color
Partially, and accurately judge the color and type of offset, present applicant proposes a kind of for detecting the side of the colour cast situation of display device
Method.
Fig. 5 shows a kind of embodiment of method of the invention.In Fig. 5, display to be measured include down polaroid 11,
First glass substrate 1, tft array 2, sandwiching liquid crystal 3, auxiliary optical film layer 4, color blocking layer (including red color resistance 5, green color blocking 6
With blue color blocking 10), black matrix" 30, the second glass substrate 7 and upper polaroid 12.In the embodiment shown in fig. 5, red picture
Element 5 is bright, and green pixel 6 and blue pixel 7 are closed.Color i.e. to be measured is the red in three primary colors, and pixel to be measured is red pixel.
The invention proposes a kind of methods for detecting the colour cast situation of display device.Firstly, being selected from pixel color
Select a kind of color to be measured (in Fig. 5, color to be measured is the red in three primary colors)；Control display signal, so that display to be measured
Display picture only show the color to be measured (in the embodiment shown in fig. 5, red pixel 5 be bright, green pixel 6 and blue
Pixel 7 is closed)；Optical filter is set between display to be measured and the eyes of observer, so that the light from the display picture
Line is via the eyes for entering observer after the optical filter, and the optical filter only can be through non-color to be measured (in Fig. 5
In, optical filter only transmits green)；Tester is under visual angle to be measured through optical filter observation display picture.
In terms of specific configuration, optical filter can be configured with the sheet body of color blocking.Optical filter includes substrate and even spread
The photoresist for specific wavelength on the substrate.In oneainstance, in the color blocking of optical filter and display to be measured
It is identical as the color blocking of the adjacent pixel in the pixel visual angle with color to be measured.In the case where another alternative, optical filter
The transmission region of color blocking can be located at the light transmission wave of the pixel (non-display pixel) adjacent with the pixel visual angle with color to be measured
Duan Zhong, and only take part of it wave band.For example, the main light transmitting wavelength distribution of the color blocking of the adjacent pixel in visual angle is 500
~600nm, then the color chips can be for one section in 500~600nm through wavelength, such as 530~580nm etc..
As shown in figure 5,5 right side perspective adjacent pixel of red pixel is green when human eye watches pure red picture under LOOK RIGHT
Color pixel 6, then human eye places a color chips 13 with color blocking identical as green pixel 6 at the moment before observation, then red
Light 18 is blocked by color chips, (if there is light leakage) only leak out green light 19 can by color chips, (if there is light leakage) this
When human eye be observed that the green picture of low-light level.Human eye is higher compared with color to the sensibility of low gray-scale intensity, the previous case
It more easily identifies, therefore the method is taken to more easily determine whether colour cast occurs and the color and type of colour cast.Therefore, it ties
It closes and states optical path analysis, it is contemplated that human eye can only be seen after red picture is stopped by color chips in the case where without big visual angle colour cast
To a piece of black state；In the case where there is big visual angle colour cast, after red picture is stopped by color chips, human eye be able to observe that one it is low bright
Spend grayscale.
In oneainstance, color to be measured can be only made of a kind of color.For example, when display pattern is RGB, it can be with
Color to be measured is selected as red, so that the optical filter is only capable of through one of green light or blue light.It similarly, can also will be to
It surveys color and is selected as blue, so that the optical filter is only capable of through one of green light or feux rouges.It similarly, can also be by face to be measured
Color sorting is selected as green, so that the optical filter is only capable of through one of blue light or feux rouges.Above situation is only exemplary,
And it is non-limiting.The case where above situation only for display is RGB mode, however, when display is not RGB mode,
When being the display of other color modes, the adjacent color of display color to be measured and visual angle can not only selected from RGB three primary colors it
One of one, such as can be selected from RGBY (red, green, blue and yellow) four basic colors.
In oneainstance, color to be measured or non-color to be measured can be made of more than one color.Such as with feelings of sowing
Condition: 1) when display pattern is RGB, picture to be measured can be the hybrid picture of two kinds of pixels in the pixel of tri- kinds of colors of RGB, and
Color chips is the color blocking color of an other non-display pixel.2) when display pattern is RGBW, RGBY etc., color chips be may be configured as only thoroughly
Cross the light of one of four Essential colour color, and picture to be measured be chosen as one of different sub-pixel of other color chips or
Picture, pattern or the picture of a variety of shown colors.
In conclusion color chips isolation method is used when checking big visual angle colour cast, when Display panel face to be measured according to the application
When color, human eye can allow a kind of color chips to observe, and such color chips has and identical as the adjacent pixel in display pixel visual angle to be measured
Color blocking.The adjacent pixel case in so-called visual angle as such the case where: when LOOK RIGHT is observed, the adjacent pixel in visual angle can be to be measured aobvious
Show adjacent pixel on the right side of pixel；When LOOK LEFT is observed, the adjacent pixel in visual angle can be adjacent pixel on the left of display pixel to be measured.It is logical
It crosses color chips and obstructs the light of display pixel to be measured and penetrate, and the light-transmissive color chips that visual angle adjacent pixel leaks out, human eye energy at this time
Watch the brightness of panel.Compared to color (optical wavelength), human eye more easily determines the brightness of light.It therefore, by this method, can be more
Whether have big visual angle colour cast, the color which kind of color has occurred also is judged in combination with used color blocking device color blocking if readily recognizing
Partially.
In order to more completely judge entirely to show the colour cast situation of screen, the size of the sheet body preferably with it is described to be measured aobvious
Show that the display screen size of device is identical.Detection process itself generates difference between the different zones of display screen curtain in order to prevent,
When being detected, the display screen of the sheet body and the display to be measured can be placed in parallel.
Certainly, above situation is not unique.Alternatively, detection case can also be carried out in a manner of the following two kinds: 1) hand
Hold sheet body, sheet body can be the size of the display screen less than display, and sheet body can be used and observe close to human eye and blocking；
2) sheet body that the display screen size less than display can be used moves over the display, tight to observe the big visual angle colour cast in part
The display of weight.
Extraneous light causes error to detection in order to prevent, when being detected, can be by the sheet body and described to be measured aobvious
Show that the display screen gapless fitting of device is placed.
The scheme of the application is successfully realized, and replaces color to identify by brightness judgement, to judge whether panel has
There is big visual angle colour cast.
Fig. 6 shows the embodiment of the designed method as comparative example.In Fig. 6, under display to be measured includes
Polaroid 11, the first glass substrate 1, tft array 2, sandwiching liquid crystal 3, auxiliary optical film layer 4, color blocking layer (including red color resistance 5,
Green color blocking 6 and blue color blocking 10), black matrix" 30, the second glass substrate 7 and upper polaroid 12.Red pixel 5 is bright, green
Pixel 6 and blue pixel 7 are closed.Color i.e. to be measured is the red in three primary colors, and pixel to be measured is red pixel.
In comparative example shown in Fig. 6, red pixel 5 is opened in red picture, and green 6, blue pixel 10 are closed.Work as people
When eye watches panel under big visual angle, has some light certain phase is occurred by the liquid crystal opened in red pixel 5 and prolong
Late, then pass through upper polaroid 12 at 6 position of green pixel.Because green color blocking only allows the light of green color to leak out, red
Part green light is mixed in color picture, so that red picture color is deviated under big visual angle, such as partially yellow.However, people
Eye is in the big visual angle colour cast of direct viewing, due to being to be doped with a small amount of green lights 19 in red light 18,18 light of a large amount of red
Disturb the judgement of human eye, therefore the more difficult degree for identifying big visual angle colour cast of human eye.
Two compare, it is found that relative to comparative example shown in fig. 6, the embodiment that the application is proposed has following
The utility model has the advantages that personnel in production is allowed quickly and easily to check whether panel has big visual angle colour cast；Pass through different thickness simultaneously
It spends, the color chips of type can relatively easily judge big visual angle colour cast degree and grade possessed by panel.Panel can be saved
The time for checking and judging.
Above-described embodiment causes big visual angle colour cast to become serious situation explanation only for light leakage in liquid crystal display, but simultaneously
It is not limited to this, technical solution proposed by the invention can also be directed to the other types display with colour cast, simply by the presence of
Display color to be measured and the display of doping interference color can use according to the method for the present invention.
Although describing the present invention herein with reference to specific embodiment, it should be understood that, these realities
Apply the example that example is only principles and applications.It should therefore be understood that can be carried out to exemplary embodiment
Many modifications, and can be designed that other arrangements, without departing from spirit of the invention as defined in the appended claims
And range.It should be understood that different appurtenances can be combined by being different from mode described in original claim
Benefit requires and feature described herein.It will also be appreciated that the feature in conjunction with described in separate embodiments can be used
In other described embodiments.
Claims (6)
1. a kind of method for detecting the colour cast situation of display device characterized by comprising
At least one color to be measured is selected from display color；
So that the display picture of display to be measured only shows the color to be measured；
Optical filter is set between display to be measured and the eyes of observer, so that the light from the display picture is via institute
The eyes for entering observer after optical filter are stated, and the optical filter can only penetrate non-color to be measured；
Through optical filter observation display picture under visual angle to be measured, the optical filter is configured with the sheet body of color blocking, institute
State it is identical as the color blocking of the adjacent pixel in the pixel visual angle with color to be measured in the color blocking and display to be measured of optical filter,
In,
The size of the sheet body is identical as the display screen size of the display to be measured, by the sheet body and the display to be measured
The display screen of device is placed in parallel, and when being detected, by the display screen of the sheet body and the display to be measured without
Gap fitting is placed,
Alternatively, the sheet body is less than the display screen size of display, sheet body is held, close to human eye and blocks sight using sheet body
It examines, or is moved over the display using the sheet body for the display screen size for being less than display, to observe the big visual angle colour cast in part
Serious display.
2. the method according to claim 1, wherein the optical filter includes substrate and is uniformly coated on the base
The photoresist for specific wavelength of on piece.
3. the method according to claim 1, wherein the transmission region of the color blocking of optical filter be located at with to be measured
In the transmission region of the color blocking of the adjacent pixel in the pixel visual angle of color, and only take part of it wave band.
4. the method according to claim 1, wherein color to be measured is selected as red when display pattern is RGB
Color, so that the optical filter is only capable of through one of green light or blue light；Or color to be measured is selected as blue, so that described
Optical filter is only capable of through one of green light or feux rouges；Or color to be measured is selected as green, so that the optical filter is only capable of
Through one of blue light or feux rouges.
5. the method according to claim 1, wherein color to be measured is selected as when display pattern is RGB
The mixing of two kinds of colors in tri- kinds of colors of RGB, and the color blocking light transmission color of optical filter is selected as other one non-color to be measured.
6. the method according to claim 1, wherein optical filter is arranged when display pattern is RGBW or RGBY
For through corresponding modes four primary one of color light, and color to be measured be then selected as one of other colors or
Person is a variety of.
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| CN201510932957.4A CN105404032B (en) | 2015-12-15 | 2015-12-15 | A method of for detecting the colour cast situation of display device |
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| CN105404032B true CN105404032B (en) | 2019-03-26 |
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| CN109471276B (en) * | 2018-11-07 | 2021-10-08 | 凌云光技术股份有限公司 | Method and device for detecting color cast defect of liquid crystal display |
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| CN101846830A (en) * | 2010-03-19 | 2010-09-29 | 华映光电股份有限公司 | Improvement method of color cast of liquid crystal display |
| CN102750713A (en) * | 2012-07-18 | 2012-10-24 | 山东神思电子技术股份有限公司 | Image color shift detection method |
| CN103200349A (en) * | 2013-04-08 | 2013-07-10 | 武汉大学 | Scanned image color cast automatic detection method |
| CN104202596A (en) * | 2014-09-17 | 2014-12-10 | 西安电子科技大学 | Image color-cast detection method and system applied to intelligent terminal |
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|---|---|---|---|---|
| CN101846830A (en) * | 2010-03-19 | 2010-09-29 | 华映光电股份有限公司 | Improvement method of color cast of liquid crystal display |
| CN102750713A (en) * | 2012-07-18 | 2012-10-24 | 山东神思电子技术股份有限公司 | Image color shift detection method |
| CN103200349A (en) * | 2013-04-08 | 2013-07-10 | 武汉大学 | Scanned image color cast automatic detection method |
| CN104202596A (en) * | 2014-09-17 | 2014-12-10 | 西安电子科技大学 | Image color-cast detection method and system applied to intelligent terminal |
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