CN111290158B - Display substrate, display panel and display device - Google Patents

Display substrate, display panel and display device Download PDF

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Publication number
CN111290158B
CN111290158B CN202010237563.8A CN202010237563A CN111290158B CN 111290158 B CN111290158 B CN 111290158B CN 202010237563 A CN202010237563 A CN 202010237563A CN 111290158 B CN111290158 B CN 111290158B
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Prior art keywords
substrate
display
display panel
pixel unit
black matrix
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CN111290158A (en
Inventor
何玉婷
王宇鹏
马禹
刘晓那
张吉亮
曹薇
王建俊
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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Priority to CN202010237563.8A priority Critical patent/CN111290158B/en
Publication of CN111290158A publication Critical patent/CN111290158A/en
Priority to PCT/CN2020/141535 priority patent/WO2021196787A1/en
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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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133707—Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line

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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)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention provides a display substrate, a display panel and a display device. The display substrate includes: the display device comprises a first substrate, a second substrate and a plurality of pixel units, wherein the first substrate is limited with the plurality of pixel units, and any two adjacent pixel units arranged along a first direction are a first pixel unit and a second pixel unit; the black matrix layer is arranged on one side of the first substrate, the orthographic projection of the black matrix layer on the first substrate is at least partially overlapped with the first pixel unit, the overlapped area comprises a first overlapped area, the orthographic projection of the black matrix layer on the first substrate is partially overlapped with the second pixel unit, the overlapped area comprises a second overlapped area, the first overlapped area and the second overlapped area are adjacent to each other along the first direction, and the area of the first overlapped area is larger than that of the second overlapped area. According to the display substrate provided by the invention, the width of one side of the black matrix on the display substrate far away from the sinking direction is widened, so that the boundary area of two adjacent pixel units along the sinking direction can be effectively shielded even if the black matrix sinks, and therefore, the defects of light leakage, color crosstalk and the like easily occurring after a large-size product is used for a long time are solved.

Description

Display substrate, display panel and display device
Technical Field
The invention relates to the technical field of display, in particular to a display substrate, a display panel and a display device.
Background
At present, the display technology is applied more and more in the fields of meeting rooms, home theaters, outdoor advertisements and the like, so that the demand for large-screen vertical screen display is increasing day by day, the requirement for high-quality technology of the display is higher, and the long-term display quality of the product needs to be ensured on the premise of ensuring basic parameters such as brightness and contrast of the product.
Disclosure of Invention
The present invention has been completed based on the following findings of the inventors:
the inventor of the invention aims at the technical problem that the black matrix sinks in the display screen used by the vertical screen, and can shield the light leakage or the color crosstalk area even if the black matrix sinks after long-time use by increasing the width of one side of the black matrix, thereby solving the problem that the vertical screen display panel is easy to generate the bad risks of color crosstalk or light leakage and the like.
In a first aspect of the invention, a display substrate is provided.
According to an embodiment of the present invention, the display substrate includes: the pixel structure comprises a first substrate, a second substrate and a plurality of pixel units, wherein the first substrate is limited with the plurality of pixel units, and any two adjacent pixel units arranged along a first direction are a first pixel unit and a second pixel unit; the black matrix layer is arranged on one side of the first substrate, and an orthographic projection of the black matrix layer on the first substrate at least partially overlaps with the first pixel unit, wherein the overlapped area comprises a first overlapped area and a second overlapped area, and the orthographic projection of the black matrix layer on the first substrate at least partially overlaps with the second pixel unit, wherein the overlapped area comprises a second overlapped area, the direction of the first overlapped area pointing to the second overlapped area is the first direction, the first overlapped area is adjacent to the second overlapped area along the first direction, and the area of the first overlapped area is larger than that of the second overlapped area.
The inventor finds that, through widening the width of one side of the black matrix far away from the sinking direction on the display substrate, the display substrate of the embodiment of the invention can effectively shield the boundary area of two adjacent pixel units along the sinking direction even if the black matrix sinks, thereby solving the defects of light leakage, color crosstalk and the like easily occurring after long-time use of large-size products.
In addition, the display substrate according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the invention, the ratio of the dimension of the first overlapping zone in the first direction to the dimension of the second overlapping zone in the first direction is 2.
According to an embodiment of the present invention, a difference between a dimension of the first overlapping area in the first direction and a dimension of the second overlapping area in the first direction is 1 to 5 micrometers, and a sum of the dimensions of the first overlapping area and the second overlapping area in the first direction is 20 to 30 micrometers.
According to an embodiment of the present invention, the display substrate is a color filter substrate, each pixel unit includes a color resistance unit, a long side of the pixel unit is parallel to a short side of the display substrate, and the short side of the pixel unit is parallel to the long side of the display substrate.
In a second aspect of the invention, a display panel is presented.
According to an embodiment of the present invention, the display panel includes: the display substrate described above; an opposing substrate provided to the display substrate pair cassette; wherein, display substrate's first base plate is close to one side of opposition base plate still is provided with first alignment film, the second base plate of opposition base plate is close to one side of display substrate is provided with the second and is joined in marriage the membrane, just first alignment film with be provided with the liquid crystal layer between the membrane is joined in marriage to the second, and, first alignment film or the second is joined in marriage the orientation of membrane with first direction is opposite.
The inventor finds that, in the display panel of the embodiment of the invention, even if the black matrix layer on the display substrate sinks, the defects such as light leakage or color crosstalk do not occur, and the black matrix layer with one widened side can shield the alignment shadow area, so that the display panel has a better long-term vertical screen display effect and higher transmittance. It will be understood by those skilled in the art that the features and advantages described above for the display substrate are still applicable to the display panel and will not be described herein again.
In addition, the display panel according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, an alignment direction of the first alignment film is opposite to an alignment direction of the second alignment film.
According to the embodiment of the invention, a first electrode and a second electrode are further arranged on one side of the second substrate close to the display substrate, the second electrode is positioned on one side of the first electrode far away from the second substrate, the second electrode is a slit electrode, and an included angle between a slit direction of the slit electrode and an alignment direction of the second alignment film ranges from 5 degrees to 15 degrees.
According to an embodiment of the present invention, the display panel further includes: the first polaroid is arranged on one side, far away from the opposite substrate, of the display substrate; the second polaroid is arranged on one side, far away from the display substrate, of the opposite substrate; the absorption axis of the first polarizer is parallel to the short side of the display panel, and the absorption axis of the second polarizer is parallel to the long side of the display panel.
According to an embodiment of the present invention, the second substrate is further provided with a data line and a plurality of gate lines, which are arranged in a crossing manner, wherein an extending direction of the data line is parallel to a short side of the display panel, and an extending direction of the gate line is parallel to a long side of the display panel, and the two adjacent data lines and the two adjacent gate lines define the pixel unit, and the long side of the pixel unit is parallel to the extending direction of the data line.
According to an embodiment of the invention, the long side of the display panel is parallel to the direction of use.
In a third aspect of the invention, a display device is presented.
According to an embodiment of the present invention, the display device includes the display panel described above.
The inventor finds that the display device of the embodiment of the invention has better long-term display effect and higher transmittance of the display panel, so that the display device has better display quality under the condition of long-term vertical screen display. It will be appreciated by those skilled in the art that the features and advantages described above for the display-based display panel are still applicable to the display device and will not be described in detail herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing aspects of the invention are explained in the detailed description of the embodiments with reference to the drawings, in which:
FIG. 1 is a bottom view of a display substrate according to one embodiment of the present invention;
FIG. 2 is a schematic diagram showing the comparison between a conventional black matrix layer (a) and a one-sided widened black matrix layer (b) according to the present invention before and after sinking;
FIG. 3 is a schematic cross-sectional view of a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
FIG. 5 is a schematic top view of an opposing substrate according to another embodiment of the invention;
FIG. 6 is a schematic diagram comparing a portrait pixel design with a landscape pixel design of the present invention;
FIG. 7 is a schematic diagram of the long and short axes of liquid crystal molecules according to an embodiment of the present invention.
Reference numerals
100. Display substrate
110. First substrate
120. Black matrix layer
130. A first alignment layer
200. Opposed substrate
210. Second substrate
220. Second alignment layer
230. A first electrode
240. Second electrode
250. Data line
260. Grid line
300. Liquid crystal layer
400. A first polarizer
500. A second polarizer
10. Display panel
Detailed Description
The following examples of the present invention are described in detail, and it will be understood by those skilled in the art that the following examples are intended to illustrate the present invention, but should not be construed as limiting the present invention. Unless otherwise indicated, specific techniques or conditions are not explicitly described in the following examples, and those skilled in the art may follow techniques or conditions commonly employed in the art or in accordance with the product specifications.
In one aspect of the present invention, a display substrate is provided.
According to an embodiment of the present invention, referring to fig. 1, a display substrate 100 includes a first substrate 110 and a black matrix layer 120; a plurality of pixel units a, such as a red pixel unit R, a green pixel unit G, a blue pixel unit B, or the like, are defined on the first substrate 110, wherein any two adjacent pixel units arranged along the first direction are a first pixel unit and a second pixel unit; the black matrix layer 120 is disposed on one side of the first substrate 110, and an orthographic projection of the black matrix layer 120 on the first substrate 110 at least partially overlaps the first pixel unit, wherein the overlapping region includes a first overlapping region B 1 And, the orthographic projection of the black matrix layer 120 on the first substrate 110 at least partially overlaps with the second pixel unit, wherein the overlapped area includes a second overlapped area B 2 And, the first overlapping area B 1 To the second overlap region B 2 Is a first direction, a first overlap zone B 1 With a second overlapping area B 2 Adjacent along the first direction, a first overlapping region B 1 Is larger than the second overlapping area B 2 The area of (a).
The inventor of the present invention found that, referring to fig. 2 (a), after a long time use, the current large-sized product is prone to sink and deviate from the designed value due to the heavy weight of the black matrix layer, and when the misalignment of the black matrix layer is serious, the color resistance (for example, RGB) overlapping part may leak, thereby causing color crosstalk or light leakage. Particularly, when a large-sized product is used for a long time in a vertical screen (i.e., the long side of the product in a rectangular shape is parallel to the use direction), the undesirable probability of color cross-over or light leakage is higher. Therefore, the inventors have effectively reduced the possibility of an increase in the adverse risk of a large-sized product after long-term use by widening the width of one side of the black matrix layer away from the sinking direction, and thus, referring to (b) of fig. 2, blocking the region of light leakage or color cross even though the black matrix layer sinks. It should be noted that the directions of the "use direction", "sinking direction" and "first direction" are the same herein.
In some embodiments of the invention, the first overlap region B 1 Dimension along the first direction and the second overlapping area B 2 The ratio of the sizes along the first direction may be 2 to 5, so that the sizes of both sides of the black matrix layer 120 do not need to be enlarged, and only the size of one side may be enlarged according to the sinking direction, thereby avoiding adverse effects and reducing adverse effects on the aperture ratio. In some specific examples, the first overlap region B 1 The size along the first direction and the second overlapping area B 2 The difference in size along the first direction may be 1 to 5 micrometers, specifically, for example, 3 to 4 micrometers wider, and thus, the problem of light leakage or color crosstalk after the black matrix layer 120 sinks can be effectively avoided by only slightly increasing the width of one side of the black matrix layer 120.
In some embodiments of the invention, the first overlap region B 1 And a second overlapping area B 2 The sum of the sizes along the first direction may be 20 to 30 micrometers, specifically, for example, 2 micrometers, so that, for an original black matrix layer with a width of 24 micrometers, after widening by 4 micrometers on one side, the total width of the black matrix layer only needs to be increased to 28 micrometers, and the transmittance of the display substrate is not significantly reduced.
In some embodiments of the present invention, the display substrate 100 may be a color filter substrate (CF), each pixel unit a includes a color resistance unit, the color resistance layer in each pixel unit may be a red color resistance layer, a green color resistance layer, a blue color resistance layer, or the like, the long side of the pixel unit may be parallel to the short side of the display substrate, and the short side of the pixel unit may be parallel to the long side of the display substrate. As such, with reference to fig. 6, the product selection horizontal pixel design for vertical use (fig. 6 (a)) can significantly reduce the number of charging rows relative to the vertical pixel design (fig. 6 (b)), specifically, for example, from 3840 to 1536, thereby reducing the difficulty of charging and reducing the risk of insufficient charging rate. It should be noted that, only 3 pixel units a are shown in fig. 6 (a) and (b) as an illustration, and hundreds of pixel units arranged in an array may be disposed on an actual display substrate. It should be noted that the term "long side" and "short side" in this document refer to a parallelogram or a rectangle, respectively, and the longer side is the long side, and the shorter side is the short side.
In summary, according to the embodiments of the present invention, the present invention provides a display substrate, in which a width of a single side of a black matrix on the display substrate, which is far from a sinking direction, is widened, so that even if the black matrix sinks, a boundary region between two adjacent pixel units along the sinking direction can be effectively blocked, thereby solving the problems of light leakage or color crosstalk, which easily occurs after a large-sized product is used for a long time.
In another aspect of the present invention, a display panel is provided.
According to an embodiment of the present invention, referring to fig. 3, the display panel 10 includes the above-mentioned display substrate 100 and the counter substrate 200, wherein the counter substrate 200 and the display substrate 100 are set to be opposite to each other, and liquid crystal is filled between the counter substrate 200 and the display substrate 100 to form a liquid crystal layer 300; moreover, a side of the first substrate 110 of the display substrate 100 close to the opposite substrate 200 may be provided with the first alignment film 130, a side of the second substrate 210 of the opposite substrate 200 close to the display substrate 100 may be further provided with the second alignment film 220, and an alignment direction a of the first alignment film 130 or an alignment direction b of the second alignment film 220 is opposite to the first direction.
The inventors of the present invention have also found that, in the alignment (rubbing) process, when the rubbing roll passes through the uneven surface region of the alignment film (for example, the substrate is provided with the raised structure such as the thin film transistor, the electrode or the signal line), the cloth hair of the rubbing cloth cannot be recovered in time, so that the partial region adjacent to the uneven surface region along the alignment direction is not effectively rubbed and aligned, and thus light leakage and other defects (mura) occur. Therefore, in order to avoid the influence of the poor alignment on the display effect of the display panel, a section of alignment shadow (rubbing shadow) needs to be reserved in the region of the alignment film with the step difference, wherein the alignment shadow needs to be disposed on one side of the protrusion region along the alignment direction, i.e., the region adjacent to the protrusion region along the alignment direction and not effectively rubbed and aligned, and the alignment direction is the alignment direction of the substrate on which the protrusion is located. In addition, the width of the black matrix layer is correspondingly widened in the alignment shadow area, and meanwhile, the defects of light leakage and the like caused by alignment can be avoided.
Therefore, in order to avoid further reducing the transmittance of the display panel, the inventor designs the alignment shadow region and the single-side widening region of the black matrix layer on the same side, so that by widening the width of one side of the black matrix layer, the problems of light leakage or cross color and the like caused by the sinking and poor alignment of the black matrix layer can be avoided at the same time, thereby ensuring the long-term display quality of the display panel and maximizing the aperture opening ratio.
In some embodiments of the present invention, the display substrate 100 may be a color filter substrate (CF substrate) and the opposite substrate 200 may be an array substrate (TFT substrate), so that a plurality of control units are disposed on a second substrate of the array substrate, and correspond to pixel units of the color filter substrate one to one, and each control unit includes at least one thin film transistor for controlling liquid crystal molecules in a region where the control unit is located to implement deflection. Therefore, the black matrix layer is disposed on the CF substrate, and the second alignment film on the TFT substrate has an alignment shadow region, so that it is necessary that the alignment direction of the second alignment film is opposite to the first direction.
In other embodiments of the present invention, the display substrate 100 may be an array substrate (COA substrate) provided with a photoresist layer, and the COA substrate is paired with the opposite substrate 200, so that not only a plurality of control units are disposed on the second substrate of the COA substrate, but also a photoresist layer is correspondingly disposed in each pixel unit, and the black matrix layer and the photoresist layer are disposed on the same layer and surround the photoresist layer. Therefore, the black matrix layer is disposed on the COA substrate, and the first alignment film on the COA substrate has an alignment shadow region, so that it is required that the alignment direction of the first alignment film is opposite to the first direction.
In some embodiments of the present invention, the alignment direction a of the first alignment film 130 is parallel to and opposite to the alignment direction b of the second alignment film 220, so that the alignment directions of the two substrates are opposite in an ADS mode (Advanced Super Dimension Switch mode, ADS for short), which can improve the contrast ratio of the display panel and improve the yellowing defect of the large-sized lower side.
In some specific examples, when the display substrate 100 is a CF substrate and the opposite substrate 200 is a TFT substrate, referring to fig. 4, a first electrode 230 and a second electrode 240 are further disposed on a side of the second substrate 210 close to the display substrate 100, and the second electrode 240 is located on a side of the first electrode 230 away from the second substrate 210, where the first electrode 230 may be a slit electrode or a plate electrode, and the second electrode 240 may be a slit electrode, and the liquid crystal deflection is controlled by forming a multi-dimensional electric field through an electric field generated at an edge of the slit electrode and an electric field generated between the slit electrode layer and the plate electrode layer in the same plane. In some examples, the first electrode 230 may be a common electrode, and the second electrode 240 may be a pixel electrode; alternatively, the first electrode 230 may be a pixel electrode, and the second electrode 240 may be a common electrode, which is not limited in this disclosure. The included angle between the slit direction of the slit electrode and the alignment direction of the second alignment film may be in a range of 5-15 °, so that for the ADS mode, the slit direction of the slit electrode and the alignment direction of the alignment film on the same side maintain the included angle range, and the response time and transmittance may be relatively optimal, thereby improving the display effect of the display panel
In some specific examples, referring to fig. 3, the first alignment film 130 may be aligned from top to bottom (i.e., the first direction), and the second alignment film 220 may be aligned from bottom to top (i.e., the direction opposite to the first direction), so that the contrast ratio of the display panel may be further improved, and the display effect of the display panel may be better.
Specifically, different alignment directions may cause the liquid crystal molecules C to be arranged at different angles, wherein d Δ n of the large viewing angle of the long and short axes of the liquid crystal is different, and referring to fig. 7, bluish (Blue Shift) is likely to appear along the long axis direction of the liquid crystal molecules C, and Yellowish (Yellow Shift) is likely to appear along the short axis direction of the liquid crystal molecules C, so that the axial difference may cause the color cast of the large viewing angle of the product to be different. Therefore, when the alignment a on the array substrate 200 is from top to bottom and the alignment b on the color film substrate 100 is from bottom to top, the initial arrangement direction of the liquid crystal molecules C under the alignment effect can refer to fig. 3, at this time, the display side (light-emitting side) of the display panel is the side where the color film substrate 100 is located, when viewed from the light-emitting direction, the lower viewing angle p of the display panel will turn blue and the upper viewing angle u will turn yellow, although color cast of the upper and lower viewing angles is a little concern, when the product is vertically used, the bottom of the liquid crystal screen is easy to form liquid crystal accumulation, especially, the lower end of the screen will slightly turn yellow after the product is vertically placed for a long time, and the poor visual effect can be reduced by the alignment design of the lower viewing angle turning blue and the upper viewing angle turning yellow.
In some embodiments of the present invention, referring to fig. 4, the display panel 10 may further include a first polarizer 400 and a second polarizer 500, wherein the first polarizer 400 may be disposed on a side of the display substrate 100 away from the opposite substrate 200; the second polarizer 500 may be disposed on a side of the opposite substrate 200 away from the display substrate 100; also, an absorption axis of the first polarizer 400 may be parallel to a short side of the display panel 10, and an absorption axis of the second polarizer 500 may be parallel to a long side of the display panel 10. Therefore, the design of the polaroids on the two sides of the liquid crystal box can effectively reduce the influence of the deformation of the polaroid on the display panel.
In some embodiments of the present invention, referring to fig. 5, the second substrate 210 of the opposite substrate 200 may further be provided with a data line 250 and a plurality of gate lines 260, which are arranged in a crossing manner, wherein an extending direction of the data line 250 may be parallel to a short side of the display panel 10, and an extending direction of the gate lines 260 may be parallel to a long side of the display panel 10, and two adjacent data lines 250 and two adjacent gate lines 260 define a pixel unit a, and the long side of the pixel unit a may be parallel to the extending direction of the data line 250. So, to being applicable to the display panel that the vertical screen used, display panel's long limit is on a parallel with the direction of use promptly, adopts horizontal pixel design can guarantee display panel's pixel charge rate.
In summary, according to the embodiments of the present invention, the present invention provides a display panel, in which even a black matrix layer on a display substrate sinks, the black matrix layer with a widened single side can also shield an alignment shadow region, so that the long-term vertical screen display effect of the display panel is better and the transmittance is higher. It will be understood by those skilled in the art that the features and advantages described above for the display substrate are still applicable to the display panel and will not be described herein again.
In another aspect of the invention, a display device is provided. According to an embodiment of the invention, the display device comprises the display panel.
According to the embodiment of the present application, the specific type of the display device is not particularly limited, specifically, for example, a display screen, a television, a mobile phone, a tablet computer, or a smart watch, and the like, and those skilled in the art can correspondingly select the display device according to the actual use requirement of the display device, and details are not repeated herein. It should be noted that, besides the display panel, the display device further includes other necessary components and structures, for example, an LCD display screen, specifically, such as a housing, a control circuit board or a power line, etc., and those skilled in the art can perform corresponding supplement according to the functions of the display device, and details are not repeated herein.
In summary, according to the embodiments of the present invention, the present invention provides a display device, in which a long-term display effect of a display panel is better and a transmittance is higher, so that a display quality of the display device is better under a long-term vertical screen display condition. It will be appreciated by those skilled in the art that the features and advantages described above for the display-based display panel are still applicable to the display device and will not be described in detail here.
In the description of the present invention, it is to be understood that the terms "width", "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (6)

1. A display panel, comprising:
a display substrate, the display substrate comprising: the display device comprises a first substrate, a second substrate and a plurality of pixel units, wherein the first substrate is limited with the plurality of pixel units, and any two adjacent pixel units arranged along a first direction are a first pixel unit and a second pixel unit;
a black matrix layer disposed on one side of the first substrate, wherein an orthographic projection of the black matrix layer on the first substrate at least partially overlaps the first pixel unit, wherein an overlapping region includes a first overlapping region, and an orthographic projection of the black matrix layer on the first substrate at least partially overlaps the second pixel unit, wherein an overlapping region further includes a second overlapping region, and a direction of the first overlapping region directed to the second overlapping region is the first direction, the first overlapping region is adjacent to the second overlapping region along the first direction, and an area of the first overlapping region is larger than an area of the second overlapping region;
an opposing substrate provided to the display substrate pair cassette;
wherein the display substrate is a color film substrate, the opposite substrate is an array substrate, a first alignment film is further arranged on one side of a first substrate of the display substrate close to the opposite substrate, a second alignment film is arranged on one side of a second substrate of the opposite substrate close to the display substrate, a liquid crystal layer is arranged between the first alignment film and the second alignment film, the alignment direction of the first alignment film is the same as the first direction, and the alignment direction of the second alignment film is opposite to the first direction,
the long side of the display panel is parallel to the using direction, the using direction is the gravity direction, the gravity direction is the same as the first direction,
the first polaroid is arranged on one side, far away from the opposite substrate, of the display substrate; the second polaroid is arranged on one side, far away from the display substrate, of the opposite substrate; wherein the absorption axis of the first polarizer is parallel to the short side of the display panel, and the absorption axis of the second polarizer is parallel to the long side of the display panel;
the second substrate is further provided with data lines and grid lines which are arranged in a crossed mode, wherein the extending direction of the data lines is parallel to the short side of the display panel, and the extending direction of the grid lines is parallel to the long side of the display panel.
2. The display panel according to claim 1, wherein a ratio of a dimension of the first overlapping area in the first direction to a dimension of the second overlapping area in the first direction is from 2 to 1 to 5.
3. The display panel according to claim 1, wherein the difference between the dimension of the first overlapping area in the first direction and the dimension of the second overlapping area in the first direction is 1 to 5 micrometers, and the sum of the dimensions of the first overlapping area and the second overlapping area in the first direction is 20 to 30 micrometers.
4. The display panel according to claim 1, wherein the display substrate is a color filter substrate, each pixel unit comprises a color resistance unit, and a long side of the pixel unit is parallel to a short side of the display substrate, and the short side of the pixel unit is parallel to the long side of the display substrate.
5. The display panel according to claim 1, wherein a first electrode and a second electrode are further disposed on a side of the second substrate close to the display substrate, the second electrode is located on a side of the first electrode away from the second substrate, the second electrode is a slit electrode, and an included angle between a slit direction of the slit electrode and an alignment direction of the second alignment film is in a range of 5 ° to 15 °.
6. A display device comprising the display panel according to any one of claims 1 to 5.
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