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CN106019694A - Color filter, LCD panel, LCD and color filter forming method - Google Patents

Color filter, LCD panel, LCD and color filter forming method Download PDF

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Publication number
CN106019694A
CN106019694A CN201610623294.2A CN201610623294A CN106019694A CN 106019694 A CN106019694 A CN 106019694A CN 201610623294 A CN201610623294 A CN 201610623294A CN 106019694 A CN106019694 A CN 106019694A
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CN
China
Prior art keywords
color
layer
color blocking
black matrix
colored filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610623294.2A
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Chinese (zh)
Inventor
王威
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Technology Co Ltd
Priority to CN201610623294.2A priority Critical patent/CN106019694A/en
Publication of CN106019694A publication Critical patent/CN106019694A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509Filters, e.g. light shielding masks
    • G02F1/133514Colour filters
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509Filters, e.g. light shielding masks
    • G02F1/133512Light shielding layers, e.g. black matrix
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509Filters, e.g. light shielding masks
    • G02F1/133514Colour filters
    • G02F1/133516Methods for their manufacture, e.g. printing, electro-deposition or photolithography

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Filters (AREA)
  • Liquid Crystal (AREA)

Abstract

The invention discloses a color filter, an LCD panel, an LCD and a color filter forming method, belongs to the technical field of LCD manufacturing, and aims to solve the problem that the conventional LCD has large view angle color cast. According to the color filter, a black color resistor formed by two types of color resistors is overlaid on each black matrix to increase the thickness of the black matrix; then when in large view angle resisting, light can penetrate through the two types of adjacent color resistors at the same time, and finally the color cast problem caused by oblique light under large view angle can be solved. According to the provided color filter forming method, through photomask translation, two types of color resistors of a red color resistor, a green color resistor and a blue color resistor are overlaid to compound the black color resistor to increase the thickness of each black matrix, so as to solve the large view angle color cast problem finally. The color filter, the LCD panel, the LCD and the color filter forming method are suitable for manufacturing an LCD screen.

Description

A kind of colored filter, liquid crystal panel, liquid crystal display and forming method
Technical field
The invention belongs to liquid crystal display manufacturing technology field, particularly relate to a kind of colored filter, liquid crystal panel And the forming method of colored filter.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD).The structure of LCD is at the parallel glass of two panels Place liquid crystal cell in the middle of glass substrate, lower baseplate glass arranges TFT (thin film transistor (TFT)), on upper substrate glass Colored filter is set, is changed the rotation direction controlling liquid crystal molecule by the signal on TFT and voltage, from And reach to control each pixel polarized light outgoing and whether reach to show purpose.
Liquid crystal display is made up of two pieces of glass plates, thickness about 1mm, therebetween by 5 μm including liquid crystal material Uniform intervals separates.Because liquid crystal material itself is the most luminous, so being designed with as light source on display screen both sides Fluorescent tube, and be backed with one piece of backlight (or claiming even tabula rasa) and reflective membrane in LCDs, backlight is Can be launched light by what fluorescent material formed, its effect mainly provides uniform background light source.
Liquid crystal display has that Low emissivity, volume be little and the advantage such as low energy consumption, and it the most gradually replaces traditional Cathode ray tube display and be widely used in the products such as flat panel TV, PC and mobile display panel On.
Colored filter (Color filter) is that liquid crystal flat panel display (Liquid Crystal Display) is colored The key part and component changed.Colored filter provides color, colored filter (Color filter) to be a kind of for display The optical filter of apparent color, it can accurately select the little scope wave band light wave being intended to pass through, and reflect away it He is not intended to the wave band passed through.Different face is presented through the difference of spectral band by different colours sub-pix Color, and present required color by controlling the penetrating light intensity of different colours sub-pix.
Colored filter is typically mounted on the front of light source, makes human eye can receive certain saturated color of light Line.Colored filter basic structure includes: glass substrate (Glass Substrate), black matrix" (Black Matrix), color layer (Color Layer) and protective layer (Over Coat).Tri-kinds of colors of RGB, point Become three independent points, each have different gray scale variation, the point then three neighbouring RGB shown, As the ultimate unit of a display, namely pixel.This pixel just can have different colors and become Change.
Display resolution (screen resolution) is the precision of screen picture, refers to the picture that display can show Have how many.Owing to the point on screen, line dough-making powder are all made up of pixel, the displayable pixel of display is more Many, picture is the finest, and the information that can show in same screen area is the most, so resolution is individual non- One of the most important performance indications.
Resolution generally represents with the product of horizontal pixel point with vertical pixel point, and number of picture elements is the most, and it is differentiated Rate is the highest.Resolution is typically measured with number of picture elements, such as: the resolution of 640 × 480, and its number of picture elements Being 307200, wherein: 640 is horizontal pixel number, 480 is vertical pixel number.For a needs resolution For the display picture of 1024*768, as long as allowing the composition of this flat-panel screens have 1024*768 pixel, just This picture of display that can be correct.
Along with the raising of liquid crystal display resolution, the size of single sub-pix is more and more less.
As it is shown in figure 1, Fig. 1 shows that colored filter of the prior art forms the former of big visual angle colour cast effect Reason.
When the light sent by backlight incides green color blocking layer G with a bigger angle of inclination, have one Some light entered into mistakenly after layer of liquid crystal molecule with in adjacent red color resistance layer R.And this is the most just Result in the color that liquid crystal display shows and there occurs colour mixture, it may be assumed that red green colour mixture, so that liquid crystal display When watching at big visual angle there is relatively large deviation in color, i.e. liquid crystal display exists big visual angle colour cast.
In existing liquid crystal display when reducing big visual angle colour cast, in order to other optics keeping display floater are special Property do not change, often by increase black matrix wide cut by the way of control big visual angle colour cast.
Aperture opening ratio refers to remove the wiring part of each pixel, transistor portion (generally using black matrix" to hide) After light by the ratio between the overall area of the area of part and each pixel.Aperture opening ratio is the highest, light The efficiency that line passes through is the highest.
The mode of the wide cut increasing black matrix then reduces the aperture opening ratio of display floater, reduces display floater Penetrance.
Summary of the invention
For above-mentioned the problems of the prior art, present applicant proposes a kind of colored filter, liquid crystal panel, liquid Crystal display and the forming method of colored filter.
The present invention is the problem that there is big visual angle colour cast in order to solve available liquid crystal display, and existing offer is a kind of colored The forming method of optical filter, liquid crystal panel, liquid crystal display and colored filter.
A kind of colored filter, including colored filter body, the top of each black matrix" is equipped with two-layer color Resistance layer, and described two-layer color blocking layer synthesizing black.
Above-mentioned a kind of colored filter, the width of two-layer color blocking layer is identical with the width of black matrix".
Above-mentioned a kind of colored filter, two-layer color blocking layer respectively with color blocking layer one bodily form of corresponding black matrix" both sides Become.
Above-mentioned a kind of colored filter, the height after two-layer color blocking ply and the color blocking of corresponding black matrix" both sides The height of layer flushes.
Above-mentioned a kind of colored filter, the color blocking layer on adjacent three black matrix"s is respectively as follows:
Red color resistance layer and the red green resistance layer of green color blocking ply,
Blue color blocking layer and the aeruginous resistance layer of green color blocking ply,
Blue color blocking layer and the bluish red color blocking layer of red color resistance ply.
A kind of liquid crystal panel, the body of liquid crystal panel is provided with above-mentioned colored filter.
A kind of liquid crystal display, the body of liquid crystal display is provided with above-mentioned liquid crystal panel.
A kind of forming method of colored filter, the light in the exposure process of colored filter, to a kind of color Resistance step of exposure is as follows:
Step one: utilize light to cover on above black-matrix layer and carry out exposing for the first time, it is thus achieved that exposure area for the first time;
Step 2: by light shield along black matrix" orientation displacement A, carries out second time and exposes, it is thus achieved that the Re-expose region;
Above-mentioned distance A is equal to the width of a black matrix".
The forming method of above-mentioned a kind of colored filter, is repeated in step one and step 2, completes other colors The exposure of photoresistance.
The forming method of above-mentioned a kind of colored filter, the exposed width of light shield is equal to a black matrix" head end extremely The width of the black matrix" head end being adjacent.
A kind of colored filter of the present invention, black by two kinds of color blockings synthesis of superposition above black matrix" Color blocking increases the thickness of black matrix, and then when stopping big visual angle, also cross the light of two kinds of adjacent color blockings, The colour cast problem that the final skew ray solved under big visual angle causes.
A kind of liquid crystal panel of the present invention, the body of liquid crystal panel is provided with above-mentioned a kind of colorized optical filtering Sheet.So, when big visual angle viewing screen, owing to black matrix" thickness increases, it becomes possible to well stop big The colour cast problem that skew ray under visual angle causes.
Above-mentioned liquid crystal panel it is provided with on the body of liquid crystal display of the present invention.So, see at big visual angle When seeing screen, owing to black matrix" thickness increases, it becomes possible to well stop what the skew ray under big visual angle caused Colour cast problem.
The forming method of a kind of colored filter that the present invention proposes, by translation light shield so that red in formation, Two kinds of color blocking superposition synthesizing blacks resistances during green, blue light hinders increase black matrix thickness, final solution big visual angle color Inclined problem.
The present invention is applicable to manufacture LCDs.
Above-mentioned technical characteristic can combine in any suitable manner or be substituted by the technical characteristic of equivalence, if energy Enough reach the purpose of the present invention.
Accompanying drawing explanation
Hereinafter based on embodiment reference accompanying drawing, the present invention will be described in more detail.Wherein:
Fig. 1 is the design sketch that colored filter of the prior art produces colour cast at big visual angle when watching,
R represents that red color resistance, G represent green color blocking, and B represents blue color blocking;
Fig. 2 is the structural representation of the colored filter described in the specific embodiment of the invention one,
1 represents gap control material, and 2 represent photoresistance protecting film layer, and 3 represent black matrix", and 4 represent glass base Plate, 5R represents that red color resistance, 5G represent green color blocking, and 5B represents blue color blocking;
Fig. 3 is design sketch when watching at big visual angle of the colored filter described in the specific embodiment of the invention one;
Fig. 4 is the formation schematic diagram of colored filter in the specific embodiment of the invention four,
Wherein, M1 represents the light shield of exposure position for the first time, and M2 represents the light shield of second time exposure position, a1 Representing the width through single exposure region with a2, b represents the width through region of double exposing, and c represents light The exposure area width of cover;
Fig. 5 is the enlarged drawing in Fig. 2 at F1;
Fig. 6 is the enlarged drawing in Fig. 3 at F2.
In the accompanying drawings, identical parts use identical reference.Accompanying drawing is not according to actual ratio.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
The technical problem to be solved is to improve regarding greatly existing for existing display panels Angle color offset phenomenon.For solving the problems referred to above, the detailed description below that provides of the present invention is described in detail.
Detailed description of the invention one: illustrate present embodiment with reference to Fig. 2 to Fig. 4, described in present embodiment A kind of colored filter,
It is illustrated in figure 2 the structural representation of a kind of colored filter.
A kind of colored filter includes: gap control material 1, photoresistance protecting film layer 2, black matrix" 3, glass Substrate 4 and color blocking layer, described color blocking layer includes: red color resistance 5R, green color blocking 5G and blue color blocking 5B;
Wherein, the top of each black matrix" is equipped with two-layer color blocking layer, and thick by reasonably combined color blocking tunic Just synthesizing black when passing light through two kinds of color blockings;
As shown in Figure 2, the black part between the color blocking that each two is adjacent, just it is called black matrix", it is main If being used for covering the part being not intended to printing opacity.
And the above-mentioned color blocking layer being equipped with two-layer synthesizing black above each black matrix", such as Fig. 5 and Fig. 6 Shown in, this is equivalent to while not changing black matrix" precision, increases the thickness of black matrix".
So, when big visual angle viewing screen, owing to black matrix" thickness increases, it becomes possible to well stop big The colour cast problem that skew ray under visual angle causes.
As it is shown on figure 3, directly over black matrix" design RG, RB or GB color blocking layer, RG, RB and GB color blocking layer all can synthesizing black, and then be equivalent to black matrix" and increase, when light is through red color resistance layer After, the black part just become by RG color blocking lamination is blocked, and will not produce mixed color phenomenon, and then reach to prevent color Inclined purpose.
Based on above-mentioned detailed description of the invention, concrete:
The width of two-layer color blocking layer is identical with the width of black matrix".
Two-layer color blocking layer is respectively the color blocking layer of black matrix" both sides, place.
Height after two-layer color blocking ply flushes with the height of black matrix" both sides, place color blocking layer.
Two-layer color blocking layer on adjacent three black matrix"s is respectively as follows:
Red color resistance layer and the red green resistance layer of green color blocking ply,
Blue color blocking layer and the aeruginous resistance layer of green color blocking ply,
Blue color blocking layer and the bluish red color blocking layer of red color resistance ply.
Detailed description of the invention two: a kind of liquid crystal panel described in present embodiment, the body of liquid crystal panel is arranged There is above-mentioned a kind of colored filter.
So, when big visual angle viewing screen, owing to black matrix" thickness increases, it becomes possible to well stop big The colour cast problem that skew ray under visual angle causes.
Detailed description of the invention three: be provided with above-mentioned liquid crystal surface on the body of the liquid crystal display described in present embodiment Plate.
So, when big visual angle viewing screen, owing to black matrix" thickness increases, it becomes possible to well stop big The colour cast problem that skew ray under visual angle causes.
Detailed description of the invention four: the forming method of a kind of colored filter described in detailed description of the invention one,
In the exposure process of colored filter, as follows to the photoresistance exposure step of a kind of color:
Step one: utilize light to cover on above black-matrix layer and carry out exposing for the first time, it is thus achieved that exposure area for the first time;
Exposure area is above first black matrix" and between two adjacent black matrixes for the first time, i.e. interval c Corresponding part;
Step 2: by light shield along black matrix" orientation displacement A, i.e. move the width of black matrix" away from From, carry out second time and expose, it is thus achieved that exposure area for the second time.
Exposure area is top and second black between two the adjacent black matrixes exposed for the first time for the second time Above matrix.
Owing to using negativity photoresistance, accepting light exposure the most, the photoresistance amount stayed is the most, and thickness is the thickest, in It it is the photoresistance just defining and forming double thickness between two adjacent black matrixes of pattern as shown in Figure 4.
Use same method, be repeated in step one and step 2, complete the exposure of other color photoresistances;
After exposure, allow for being obtained in that above a black matrix" two kinds of photoresist layers, adjacent three black matrix"s On two-layer color blocking layer be respectively as follows:
Red color resistance layer and the red green resistance layer of green color blocking ply,
Blue color blocking layer and the aeruginous resistance layer of green color blocking ply,
Blue color blocking layer and the bluish red color blocking layer of red color resistance ply.
And two kinds of photoresist layers form black, being equivalent to black matrix" increases, after light passes red color resistance layer, The black part just become by RG color blocking lamination is blocked, and the most as shown in Figure 4, has following relation in figure:
a 1 = a 2 a 1 + b = c ,
Wherein, a1 and a2 represents the width through single exposure region, and b represents through double exposure region Width, c represents the exposure area width of light shield.
Although herein with reference to specific embodiment, the present invention is described it should be understood that, this A little embodiments are only the example of principles and applications.It should therefore be understood that can be to exemplary Embodiment carry out many amendments, and can be designed that other layout, without departing from claims The spirit and scope of the present invention limited.It should be understood that can be by being different from original claim institute The mode described combines different dependent claims and feature specifically described herein.Will also be appreciated that Can use in embodiment other described in conjunction with the feature described by independent embodiment.

Claims (10)

1. a colored filter, including colored filter body,
It is characterized in that, the top of each black matrix" is equipped with two-layer color blocking layer, and described two-layer color blocking lamination Become black.
Colored filter the most according to claim 1, it is characterised in that the width of two-layer color blocking layer with The width of black matrix" is identical.
Colored filter the most according to claim 1, it is characterised in that two-layer color blocking layer be respectively with The color blocking layer of corresponding black matrix" both sides is integrally formed.
Colored filter the most according to claim 1, it is characterised in that after two-layer color blocking ply Height flushes with the height of the color blocking layer of corresponding black matrix" both sides.
Colored filter the most according to claim 1, it is characterised in that on adjacent three black matrix"s Color blocking layer be respectively as follows:
Red color resistance layer and the red green resistance layer of green color blocking ply,
Blue color blocking layer and the aeruginous resistance layer of green color blocking ply,
Blue color blocking layer and the bluish red color blocking layer of red color resistance ply.
6. a liquid crystal panel, it is characterised in that arrange just like in claim 1-5 on the body of liquid crystal panel Colored filter described in any claim.
7. a liquid crystal display, it is characterised in that arrange just like claim 6 on the body of liquid crystal display Described liquid crystal panel.
8. the forming method of the colored filter described in claim 1, it is characterised in that
In the exposure process of colored filter, as follows to the photoresistance exposure step of a kind of color:
Step one: utilize light to cover on above black-matrix layer and carry out exposing for the first time, it is thus achieved that exposure area for the first time;
Step 2: by light shield along black matrix" orientation displacement A, carries out second time and exposes, it is thus achieved that the Re-expose region;
Above-mentioned distance A is equal to the width of a black matrix".
The forming method of colored filter the most according to claim 8, it is characterised in that
It is repeated in step one and step 2, completes the exposure of other color photoresistances.
The forming method of colored filter the most according to claim 8, it is characterised in that the exposure of light shield Optical width is equal to the width of a black matrix" head end to the black matrix" head end being adjacent.
CN201610623294.2A 2016-08-02 2016-08-02 Color filter, LCD panel, LCD and color filter forming method Pending CN106019694A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (12)

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CN106353919A (en) * 2016-11-30 2017-01-25 厦门天马微电子有限公司 Display device, color film substrate and manufacturing method thereof
CN106501989A (en) * 2016-11-10 2017-03-15 深圳市华星光电技术有限公司 A kind of substrate and preparation method thereof
CN106526966A (en) * 2016-12-12 2017-03-22 深圳市华星光电技术有限公司 Liquid crystal display
CN106547143A (en) * 2017-01-24 2017-03-29 京东方科技集团股份有限公司 The manufacture method of display base plate, display base plate and display device
CN108919549A (en) * 2018-07-17 2018-11-30 惠科股份有限公司 Display panel, manufacturing method thereof and display device
WO2018218744A1 (en) * 2017-06-01 2018-12-06 深圳市华星光电技术有限公司 Method for improving large viewing angle color cast and display panel
CN109067472A (en) * 2018-08-23 2018-12-21 东南大学 A kind of polychromatic optical signal method of reseptance based on overlapping covering filter set
CN109613741A (en) * 2019-01-11 2019-04-12 惠科股份有限公司 Display panel and method for manufacturing the same
CN110161739A (en) * 2019-06-19 2019-08-23 厦门天马微电子有限公司 A kind of display panel and display device
CN110275341A (en) * 2019-06-28 2019-09-24 厦门天马微电子有限公司 Display panel and display device
WO2022088083A1 (en) * 2020-10-30 2022-05-05 京东方科技集团股份有限公司 Display substrate, manufacturing method for display substrate, and display device
CN116841076A (en) * 2023-06-08 2023-10-03 昆山国显光电有限公司 A display panel, color filter substrate and preparation method of color filter substrate

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