CN112083605A - Liquid crystal panel, display device and alignment method of liquid crystal panel - Google Patents
Liquid crystal panel, display device and alignment method of liquid crystal panel Download PDFInfo
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- G—PHYSICS
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- 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
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- 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
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- 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
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- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
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- 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
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Abstract
The invention provides a liquid crystal panel, a display device and an alignment method of the liquid crystal panel. The invention provides a liquid crystal panel, which comprises a first substrate, a second substrate and a liquid crystal layer, wherein a first electrode is arranged on the first substrate, a second electrode is arranged on the second substrate, alignment films are arranged on the surfaces of the first electrode and the second electrode, the liquid crystal layer is arranged between the first electrode and the second electrode, the first substrate and the second substrate are provided with pixels which are oppositely arranged, each pixel is divided into a plurality of alignment areas which are arranged along the long side direction of the pixel, and the alignment directions corresponding to the adjacent alignment areas in each pixel are not parallel to each other; the first electrode is provided with a plurality of slits, the alignment directions of the slits and the corresponding orientation regions are parallel to each other, and the slits corresponding to at least two adjacent orientation regions are communicated with each other. The liquid crystal panel has a good display effect.
Description
Technical Field
The invention relates to the technical field of manufacturing of display equipment, in particular to a liquid crystal panel, a display device and an alignment method of the liquid crystal panel.
Background
Since the advent of Liquid Crystal Display (LCD), LCD gradually replaced the conventional CRT (Cathode Ray Tube) Display with its advantages of lightness, thinness, low power consumption, small radiation, easy driving, etc. With the rapid development of science and technology and the increasing improvement of living standard, consumers also put forward higher requirements on the quality of displays, and the simple color display is developed to the current wide viewing angle, high contrast and ultra-high definition image quality, and the liquid crystal display is popular with consumers due to its higher cost performance, so the wide viewing angle technology of the liquid crystal display is receiving attention of people.
In order to improve the viewing angle of the lcd, a multi-domain lcd mode with excellent performance and good quality is applied to the lcd, in which a pixel is divided into a plurality of sub-pixels with equal areas. In the multi-domain liquid crystal display mode, the most common mode is a "mu" type photo-alignment exposure mode, which divides a pixel into four alignment regions in the long side direction, and the alignment directions of two adjacent alignment regions are not parallel to each other, however, in the "mu" type photo-alignment exposure mode, during the exposure process of an array substrate or a color filter substrate, there are many dark fringe regions on the pixel, in order to improve the dark fringe regions on the pixel, slits are usually disposed on the pixel electrode of the array substrate, and the slits in each alignment region are not connected to each other.
Therefore, in the conventional "mu" type photo-alignment exposure method, the transmittance of the light of the liquid crystal panel is low, which affects the display effect of the liquid crystal display.
Disclosure of Invention
The embodiment of the invention provides a liquid crystal panel, a display device and an alignment method of the liquid crystal panel, which can optimize the display effect of the display device.
In a first aspect, the present invention provides a liquid crystal panel, including a first substrate, a second substrate and a liquid crystal layer, wherein a first electrode is disposed on the first substrate, a second electrode is disposed on the second substrate, alignment films are disposed on the surfaces of the first electrode and the second electrode, the liquid crystal layer is disposed between the first electrode and the second electrode, the first substrate and the second substrate have pixels disposed oppositely, each pixel is divided into a plurality of alignment regions arranged along a long side direction of the pixel, and alignment directions corresponding to adjacent alignment regions in each pixel are not parallel to each other;
the first electrode is provided with a plurality of slits, the alignment directions of the slits and the corresponding orientation regions are parallel to each other, and the slits corresponding to at least two adjacent orientation regions are communicated with each other.
Optionally, in the liquid crystal panel provided by the present invention, the plurality of alignment regions include a first region, a second region, a third region, and a fourth region arranged along a long side direction of the pixel;
the slits corresponding to the first region and the second region communicate with each other, and the slits corresponding to the third region and the fourth region communicate with each other.
Optionally, in the liquid crystal panel provided by the invention, the slits corresponding to the second region and the third region are not communicated with each other.
Optionally, in the liquid crystal panel provided by the invention, a storage capacitance line is further disposed on the first substrate, and a position of at least a partial structure of the storage capacitance line corresponds to a position of a dark fringe area in a pixel.
Optionally, in the liquid crystal panel provided by the present invention, the storage capacitor line includes a first extension segment and two second extension segments, and a middle portion of the second extension segment is connected to the first extension segment; the first extension section is located in a junction area of the second area and the third area, and the positions of the two second extension sections correspond to the positions of the two long edges of the pixel respectively.
Optionally, in the liquid crystal panel provided by the invention, the width of the slit ranges from 2 μm to 5 μm;
and/or the spacing between adjacent slits is between 2 μm and 5 μm.
In a second aspect, the present invention provides a display device, including the above liquid crystal panel.
In a third aspect, the present invention provides an alignment method for a liquid crystal panel, for aligning the liquid crystal panel, the alignment method including the steps of:
forming a first electrode on a first substrate, and forming a second electrode on a second substrate, wherein the first electrode and the second electrode are provided with pixels which are arranged oppositely, each pixel is divided into a plurality of orientation areas which are arranged along the long side direction of the pixel, the first electrode is provided with a plurality of slits, and the slits corresponding to at least two adjacent orientation areas are mutually communicated;
forming an alignment film on the first electrode and the second electrode;
irradiating the alignment film of one of the first electrode and the second electrode by using ultraviolet light to align the alignment film, wherein the alignment direction and the slit of the alignment film are parallel to each other, and the alignment directions corresponding to adjacent alignment regions in each pixel are not parallel to each other;
a liquid crystal layer is formed on the alignment film.
Optionally, in the alignment method of the liquid crystal panel provided by the present invention, the alignment directions corresponding to two adjacent alignment regions are perpendicular to each other, and an included angle between a projection of each alignment direction on the liquid crystal panel and a short side of a pixel is 45 ° or 135 °.
Optionally, in the alignment method of the liquid crystal panel provided by the present invention, the plurality of alignment regions include a first region, a second region, a third region, and a fourth region arranged along a long side direction of the pixel; before the first electrode is formed on the first substrate, a storage capacitance line is arranged, wherein the storage capacitance line comprises a first extension section and two second extension sections, and the middle part of each second extension section is connected with the first extension section; the first extension section is located in a junction area of the second area and the third area, and the positions of the two second extension sections correspond to the positions of the two long edges of the pixel respectively.
The invention provides a liquid crystal panel, a display device and an alignment method of the liquid crystal panel. The invention provides a liquid crystal panel, which comprises a first substrate, a second substrate and a liquid crystal layer, wherein a first electrode is arranged on the first substrate, a second electrode is arranged on the second substrate, alignment films are arranged on the surfaces of the first electrode and the second electrode, the liquid crystal layer is arranged between the first electrode and the second electrode, the first substrate and the second substrate are provided with pixels which are oppositely arranged, each pixel is divided into a plurality of alignment areas which are arranged along the long side direction of the pixel, and the alignment directions corresponding to the adjacent alignment areas in each pixel are not parallel to each other; the first electrode is provided with a plurality of slits, the alignment directions of the slits and the corresponding orientation regions are parallel to each other, and the slits corresponding to at least two adjacent orientation regions are communicated with each other. The liquid crystal panel provided by the invention has a good display effect.
The construction of the present invention and other objects and advantages thereof will be more apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1a is a schematic view illustrating an exposure state of an array substrate in a conventional "mu" type photo-alignment exposure method;
fig. 1b is a schematic diagram illustrating a state of exposing a color film substrate in a conventional "mesh" type optical alignment exposure method;
FIG. 1c is a schematic diagram of the dark fringe distribution corresponding to FIGS. 1a and 1 b;
fig. 2a is a schematic structural diagram of a liquid crystal panel according to an embodiment of the invention;
fig. 2b is a schematic structural diagram of a liquid crystal panel according to an embodiment of the invention;
FIG. 3a is a schematic diagram illustrating a slit distribution on a first substrate of a liquid crystal panel according to an embodiment of the present invention;
FIG. 3b is a schematic diagram illustrating another arrangement of slits on the first substrate in the liquid crystal panel according to the embodiment of the invention;
fig. 4a is a schematic diagram illustrating a first state of irradiation of the first alignment film in the liquid crystal panel according to the embodiment of the invention;
fig. 4b is a schematic diagram illustrating a first state of irradiation of the second alignment film in the liquid crystal panel according to the embodiment of the invention;
FIG. 4c is a schematic diagram of the dark fringe distribution corresponding to FIGS. 4a and 4 b;
fig. 5a is a schematic diagram illustrating a second state of irradiation of the first alignment film in the liquid crystal panel according to the embodiment of the invention;
fig. 5b is a schematic diagram illustrating a second state of irradiating the second alignment film in the liquid crystal panel according to the embodiment of the invention;
FIG. 5c is a schematic diagram of the dark fringe distribution corresponding to FIGS. 5a and 5 b;
fig. 6 is a schematic partial structure diagram of a liquid crystal panel according to an embodiment of the present invention;
FIG. 7 is a flowchart illustrating a method for aligning a liquid crystal panel according to the present invention;
fig. 8a is a flowchart illustrating an irradiation of the first alignment film with ultraviolet light in the alignment method of the liquid crystal panel according to the embodiment of the invention;
fig. 8b is a flowchart illustrating irradiation of the second alignment film by ultraviolet light in the alignment method of the liquid crystal panel according to the embodiment of the invention.
Description of reference numerals:
1-a first substrate; 2-a second substrate; 61a, 61b, 101a, 101b — first region; 62a, 62b, 102a, 102b — a second region; 63a, 63b, 103a, 103 b-a third region; 64a, 64b, 104a, 104 b; 3-a liquid crystal layer; 3 a-liquid crystal; 4 a-a first electrode; 41-a slit; 5 a-a first alignment film; 4 b-a second electrode; 5 b-a second alignment film; 6. 10-pixels; i11, i21 — first direction; i12, i 22-second direction; i13, i 23-third direction; i14, i 24-fourth direction; 100-storage capacitance line; 110-a first extension; 120-a second extension; 200-scan line; 300-data line.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It should be noted that the terms "first" and "second" in the description of the present invention are used merely for convenience in describing different components, and are not to be construed as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
A Thin film transistor liquid crystal display (TFT-LCD) is one of many liquid crystal displays, and may be seen as two glass substrates sandwiching a layer of liquid crystal therebetween, wherein an upper glass substrate (hereinafter, referred to as a color filter substrate) is a color filter, and a lower glass substrate (hereinafter, referred to as an array substrate) has a transistor embedded thereon. When the current passes through the transistor, the electric field changes to cause the liquid crystal molecules to deflect, so as to change the polarization of the light, and then the bright and dark states of the pixel are determined by utilizing the polaroid. In addition, the upper layer glass is attached to the color filter to form three colors of red, blue, green and the like of each pixel, and the pixels emitting the red, the blue, the green and the like form a video picture on the panel.
With the rapid development of science and technology, the living standard is increasing, and consumers also put forward higher requirements on the quality of displays, and the simple color display is developed to the current wide viewing angle, high contrast, and ultra-high definition image quality, and the liquid crystal display is popular with consumers due to its higher cost performance, so the wide viewing angle technology of the liquid crystal display is receiving attention.
In order to improve the viewing angle of the lcd, a multi-domain lcd mode with excellent performance and good quality is applied to the lcd, in which a pixel is divided into a plurality of sub-pixels with equal areas. In the multi-domain liquid crystal display mode, the most common mode is a "mu" type photo-alignment exposure mode, which divides a pixel into four alignment regions in the long side direction, and the alignment directions of two adjacent alignment regions are not parallel to each other, however, in the "mu" type photo-alignment exposure mode, during the exposure process of an array substrate or a color filter substrate, there are many dark fringe regions on the pixel, in order to improve the dark fringe regions on the pixel, slits are usually disposed on the pixel electrode of the array substrate, and the slits in each alignment region are not connected to each other.
Therefore, in the conventional "mu" type photo-alignment exposure method, the transmittance of the light of the liquid crystal panel is low, which affects the display effect of the liquid crystal display.
The conventional "mu" type photoalignment exposure method will be described below.
Fig. 1a is a schematic view of a state where an array substrate is exposed in a conventional "mu" type photo-alignment exposure method. Fig. 1b is a schematic diagram illustrating a state of exposing a color film substrate in a conventional "mu" type photo-alignment exposure method. FIG. 1c is a schematic diagram of the dark fringe distribution corresponding to FIG. 1a and FIG. 1 b. (in the following description of the orientation, the angle of the aligning force is recorded clockwise with the positive direction of the x-axis being 0 DEG)
As shown in fig. 1a to 1c, the first substrate 1 may be an array substrate, and after the first substrate 1 is exposed, each pixel 10 is divided into a first region 101a, a second region 102a, a third region 103a and a fourth region 104a arranged along the long side direction of the pixel 1, wherein the first region 101a forms a 225 ° alignment direction, the second region 102a forms a 135 ° alignment direction, the third region 103a forms a 315 ° alignment direction, and the fourth region 104a forms a 45 ° alignment direction, and since the alignment direction of the second region 102a is parallel to the alignment direction of the third region 103a, two overlapped dark stripes are formed at the boundary between the second region 102a and the third region 103a, so as to reduce the transmittance of the light of the liquid crystal panel, and affect the display effect of the liquid crystal display.
As shown in fig. 1b and fig. 1c, the second substrate 2 may be a color filter substrate, and after the second substrate 2 is exposed, each pixel 10 is divided into a first region 101b, a second region 102b, a third region 103b and a fourth region 104b arranged along the long side direction of the pixel 10, wherein the first region 101b forms a 135 ° alignment direction, the second region 102b forms a 225 ° alignment direction, the third region 103b forms a 45 ° alignment direction, and the fourth region 104b forms a 315 ° alignment direction, because the alignment direction of the second region 102b is parallel to the alignment direction of the third region 103b, two overlapped dark stripes are formed at the boundary between the second region 102b and the third region 103b, so as to reduce the transmittance of the light of the liquid crystal panel and affect the display effect of the liquid crystal display.
Therefore, the invention provides a liquid crystal panel, a display device and an alignment method of the liquid crystal panel, which can improve the display effect of the display device.
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 2a is a schematic structural diagram of a liquid crystal panel according to an embodiment of the invention. Fig. 2b is another schematic structural diagram of a liquid crystal panel according to an embodiment of the invention. Fig. 3a is a schematic diagram illustrating a distribution of slits on a first substrate in a liquid crystal panel according to an embodiment of the invention. Fig. 3b is a schematic view illustrating another slit distribution on the first substrate in the liquid crystal panel according to the embodiment of the invention.
As shown in fig. 2 to fig. 3b, an embodiment of the present invention provides a liquid crystal panel, which includes a first substrate 1, a second substrate 2, and a liquid crystal layer 3, wherein a first electrode 4a is disposed on the first substrate 1, a second electrode 4b is disposed on the second substrate 2, an alignment film is disposed on one surface of the first electrode 4a or the second electrode 4b, the liquid crystal layer 3 is disposed between the first electrode 4a and the second electrode 4b, the first substrate 1 and the second substrate 2 have pixels 6 disposed oppositely, each pixel 6 is divided into a plurality of alignment regions arranged along a long side direction of the pixel, and alignment directions corresponding to adjacent alignment regions in each pixel 6 are not parallel to each other; the first electrode 4a is provided with a plurality of slits 41, the slits 41 and the alignment directions of the corresponding alignment regions are parallel to each other, and the slits 41 corresponding to at least two adjacent alignment regions are communicated with each other.
In a specific embodiment of this embodiment, the pixels 6 are arranged in a matrix. In this embodiment, the first substrate 1 is an array substrate, and the second substrate 2 is a color filter substrate.
In a specific embodiment of the present embodiment, the first alignment film 5a is disposed on the first electrode 4a, or the second alignment film 5b is disposed on the second electrode 4b, and a semiconductor transparent (ITO) thin film, such as a transparent conductive material, e.g., Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), zinc oxide (ZnO), or tin oxide (SnO), or an alloy of these materials, may be used for the first electrode 4a and the second electrode 4 b.
In some embodiments, the first substrate 1 and the second substrate 2 are vacuum bonded in pairs by One Drop Filling (ODF). The liquid crystal dropping vacuum pairing and gluing can comprise the processes of liquid crystal dropping, frame glue coating, vacuum gluing, frame glue curing and the like. The liquid crystal dripping vacuum pair-assembling and attaching is not limited by factors such as box thickness, orientation film properties, panel size and the like, automation can be realized, the liquid crystal injection time is shortened, meanwhile, the process steps are reduced, the box forming process is simplified, and the utilization rate of liquid crystal materials can be increased.
As an alternative embodiment, the thickness of the liquid crystal layer 3 is in the range of 2.6 μm to 4.6 μm.
The liquid crystal panel provided by the embodiment includes a first substrate 1, a second substrate 2 and a liquid crystal layer 3, wherein a first electrode 4a is disposed on the first substrate 1, a second electrode 4b is disposed on the second substrate 2, and alignment films are disposed on the surfaces of the first electrode 4a and the second electrode 4b, wherein a plurality of slits 41 are disposed on the first electrode 4a, the slits 41 are parallel to the alignment direction of the corresponding alignment regions, and the slits 41 corresponding to at least two adjacent alignment regions are communicated with each other, so that the slits 41 can spatially restrict the arrangement of liquid crystal molecules, thereby enhancing the alignment force, reducing the dark fringe region on the pixel 6, and improving the light transmittance of the liquid crystal panel.
Specifically, with the positive direction of the x-axis as a 0 ° direction, the angle of the alignment force and the included angle between the slit 41 and the positive direction of the x-axis (the short side of the pixel 6) are recorded clockwise, and when the angle of the alignment force of a certain alignment region is 225 ° or 45 °, the included angle between the slit 41 and the positive direction of the x-axis in the region is 45 °; when the angle of the alignment force of an alignment region is 135 ° or 315 °, the angle between the slit 41 in the region and the positive direction of the x-axis is 135 °.
As shown in fig. 2 to 3b, in the liquid crystal panel provided by the present invention, the plurality of alignment regions include a first region 61a, a second region 62a, a third region 63a, and a fourth region 64a arranged in the long side direction of the pixel. Wherein the slits corresponding to the first region 61a, the second region 62a communicate with each other, and the slits corresponding to the third region 63a and the fourth region 64a communicate with each other.
In some embodiments, the slits 41 in the first and third regions 61a, 63a are at an angle of 135 ° to the positive x-axis, and the slits 41 in the second and fourth regions 62a, 64a are at an angle of 45 ° to the positive x-axis.
In other embodiments, the slits 41 in the first and third regions 61a, 63a are angled at 45 ° to the positive x-axis, and the slits 41 in the second and fourth regions 62a, 64a are angled at 135 ° to the positive x-axis.
Since the slits 41 are provided in the first electrode 4a, the transmittance of the pixel 6 changes from that when the slits 41 are not provided. Specifically, when the slit 41 is not provided in the first electrode 4a, the transmittance of light of the entire liquid crystal panel is set to 1. When the slits 41 are provided in the first electrode 4a but the slits of the respective alignment regions do not communicate with each other, the transmittance of light of the entire liquid crystal panel is 1.1. When the slits 41 are formed in the first electrode 4a, the slits corresponding to the first region 61a and the second region 62a are connected to each other, and the slits corresponding to the third region 63a and the fourth region 64a are connected to each other, the transmittance of the entire liquid crystal panel is 1.12. As a result, the slits 41 are provided in the first electrode 4a, which can improve the transmittance of light of the entire liquid crystal panel, as compared with the case where no slits are provided. The transmittance in each of the above cases is a proportional numerical value based on the transmittance when the slit 41 is not provided in the first electrode 4a, and does not represent an absolute value of the transmittance of the liquid crystal panel. It will be appreciated by those skilled in the art that the liquid crystal panel typically has a light transmittance of between 1% and 10%, for example around 5%.
The slits corresponding to the first region 61a and the second region 62a communicate with each other, and the slits corresponding to the third region 63a and the fourth region 64a communicate with each other, and one of them is that the slits corresponding to the first region 61a, the second region 62a, the third region 63a, and the fourth region 64a communicate with each other; the other is that the slits corresponding to the first region 61a and the second region 62a communicate with each other, the slits corresponding to the second region 62a and the third region 63a do not communicate with each other, and the slits corresponding to the third region 63a and the fourth region 64a communicate with each other.
In the two modes, the transmittance of the former liquid crystal panel was 1.11, and the transmittance of the latter liquid crystal panel was 1.12. Therefore, in the present embodiment, the slits corresponding to the first region 61a and the second region 62a are mutually communicated, the slits corresponding to the second region 62a and the third region 63a are not mutually communicated, and the slits corresponding to the third region 63a and the fourth region 64a are mutually communicated, so that the liquid crystal panel can have a high light transmittance, and the display effects of the liquid crystal panel, such as the brightness, provided by the present embodiment are improved.
In the present embodiment, each pixel 6 is divided into a first region 61a, a second region 62a, a third region 63a, and a fourth region 64a arranged in the longitudinal direction of the pixel 6 when the first alignment film 5a is irradiated; when the second alignment film 5b is irradiated, each pixel 6 is divided into a first region 61b, a second region 62b, a third region 63b, and a fourth region 64b arranged in the longitudinal direction of the pixel 6.
Fig. 4a is a schematic diagram illustrating a first state of irradiation of the first alignment film in the liquid crystal panel according to the embodiment of the invention. Fig. 4b is a schematic diagram illustrating a first state of irradiation of the second alignment film in the liquid crystal panel according to the embodiment of the invention. Fig. 4c is a schematic diagram of the dark fringe distribution corresponding to fig. 4a and fig. 4 b. Fig. 5a is a schematic diagram illustrating a second state of the liquid crystal panel according to the embodiment of the invention when the first alignment film is irradiated. Fig. 5b is a schematic diagram illustrating a second state of irradiating the second alignment film in the liquid crystal panel according to the embodiment of the invention. Fig. 5c is a schematic diagram of the dark fringe distribution corresponding to fig. 5a and 5 b. Fig. 6 is a schematic partial structure diagram of a liquid crystal panel according to an embodiment of the present invention. In the figure, the liquid crystal molecules are represented by cones, the bottom surfaces of which are the observer side.
As shown in fig. 4b and fig. 6, in order to improve the display effect of the liquid crystal panel provided in this embodiment, a storage capacitance line 100 is further disposed on the first substrate 1, and a position of at least a partial structure of the storage capacitance line 100 corresponds to a position of a dark fringe area in the pixel 6.
Therefore, at least part of the structure of the storage capacitance line 100 is overlapped with the dark fringe area, the area of the storage capacitance line 100 occupying the light transmission area of the pixel 6 is reduced, the transmittance of the optical fiber passing through the liquid crystal layer 3 can be improved, and the display effect of the liquid crystal panel provided by the embodiment is improved.
As shown in fig. 6, the liquid crystal panel provided in this embodiment further includes scan lines 200 and data lines 300, and the scan lines 200 and the data lines 300 are arranged in a crisscross manner and define a plurality of pixel regions.
In some embodiments, the storage capacitor line 100 includes a first extension segment 110 and two second extension segments 120, the middle portions of the second extension segments 120 are connected to the first extension segment 110; the first extension 110 is located at the boundary region between the second region 62a and the third region 63a, and the positions of the two second extensions 120 correspond to the positions of the two long sides of the pixel 6, respectively.
Like this for storage capacitance line 100 wholly is "H" type, makes storage capacitance line 100 can with the regional partial coincidence of dark line, makes the dark line region be difficult for observing, thereby can promote the transmissivity of passing 3 optic fibres of liquid crystal layer, and then can promote the display effect of the liquid crystal display panel that this embodiment provided.
Optionally, in this embodiment, the width of the slits 41 ranges from 2 μm to 5 μm, and/or the distance between adjacent slits 41 ranges from 2 μm to 5 μm. By adopting the arrangement of the width of the slit 41 and the distance between two adjacent slits 41, the effect of limiting the arrangement of liquid crystal molecules is better, and the alignment force is more uniform.
The liquid crystal panel provided by the embodiment comprises a first substrate, a second substrate and a liquid crystal layer, wherein a first electrode is arranged on the first substrate, a second electrode is arranged on the second substrate, an alignment film is arranged on one surface of the first electrode and the second electrode, the liquid crystal layer is arranged between the first electrode and the second electrode, the first substrate and the second substrate are provided with pixels which are oppositely arranged, each pixel is divided into a plurality of alignment areas which are arranged along the long side direction of the pixel, and the alignment directions corresponding to the adjacent alignment areas in each pixel are not parallel to each other; the first electrode is provided with a slit, and the alignment direction of the alignment film is parallel to the slit. The liquid crystal panel provided by the invention has a good display effect.
The present embodiment further provides a display device, including the liquid crystal panel, wherein the structure, function and operation principle of the liquid crystal panel are described in detail in the foregoing embodiments, and are not described herein again.
In the display device provided in this embodiment, the liquid crystal panel includes a first substrate, a second substrate, and a liquid crystal layer, a first electrode is disposed on the first substrate, a second electrode is disposed on the second substrate, alignment films are disposed on surfaces of the first electrode and the second electrode, the liquid crystal layer is disposed between the first electrode and the second electrode, the first substrate and the second substrate have pixels disposed oppositely, each pixel is divided into a plurality of alignment regions arranged along a long side direction of the pixel, and alignment directions corresponding to adjacent alignment regions in each pixel are not parallel to each other; the first electrode is provided with a slit, and the alignment direction of the alignment film is parallel to the slit. Therefore, the display device provided by the embodiment has a better display effect.
Fig. 7 is a flowchart of an alignment method of a liquid crystal panel according to the present invention. The alignment method of the liquid crystal panel in the invention can align the liquid crystal panel in the embodiment. As shown in fig. 7, the alignment method of the liquid crystal panel provided in this embodiment includes the following steps:
s101, forming a first electrode on a first substrate, and forming a second electrode on a second substrate, wherein the first electrode and the second electrode are provided with pixels which are arranged oppositely, each pixel is divided into a plurality of orientation areas which are arranged along the long side direction of the pixel, the first electrode is provided with a plurality of slits, and the slits corresponding to at least two adjacent orientation areas are mutually communicated.
Thus, the slits 41 can spatially limit the distribution of liquid crystal molecules to enhance the alignment force, thereby reducing the dark fringe area on the pixel 6 and improving the light transmittance of the liquid crystal panel.
Specifically, in forming the first electrode 4a and the second electrode 4b, first, a passivation layer may be deposited on the first substrate 1 and the second substrate 2, then a transparent conductive layer may be deposited on the passivation layer, and finally the first electrode 4a and the second electrode 4b may be formed on the transparent conductive layer by a photolithography process.
In the present embodiment, the slit 41 is formed on the first electrode 4a by a photolithography process.
And S102, forming an alignment film on the first electrode and the second electrode.
Specifically, the first electrode 4a is covered with the first alignment film 5a, or the second electrode 4b may be covered with the second alignment film 5 b.
S103, irradiating the alignment film of one of the first electrode and the second electrode by using ultraviolet light to align the alignment film, wherein the alignment direction and the slit of the alignment film are parallel to each other, and the alignment directions corresponding to adjacent alignment regions in each pixel are not parallel to each other.
Specifically, ultraviolet light is emitted by the light source, and the ultraviolet light passes through the first alignment film 5a or the second alignment film 5b, so that the first substrate 1 or the second substrate 2 is aligned to form an alignment force.
Wherein the wavelength of the ultraviolet light can be 100-400nm, and the exposure of the ultraviolet light (also called the radiation illumination of the ultraviolet light) can be 10-1000mJ/cm2The irradiation time of the ultraviolet light may be 10 to 200 seconds.
And S104, forming a liquid crystal layer on the alignment film.
Specifically, the liquid crystal layer 3 is formed on the first alignment film 5a, or the liquid crystal layer 3 is formed on the second alignment film 5 b.
In S103, the first alignment film 5a and the second alignment film 5b are irradiated with ultraviolet light to align the liquid crystal layer 3, wherein different alignment regions in each pixel 6 have different alignment directions, and the alignment directions of the different alignment regions in each pixel 6 are not parallel to each other, so that the alignment directions of two adjacent alignment regions are also not parallel to each other, thereby preventing two overlapped dark stripes from being formed at the boundary between the two adjacent alignment regions, and improving the transmittance of light of the liquid crystal panel.
In this embodiment, the first alignment film 5a and the second alignment film 5b are respectively irradiated by exposure of "mu" type photo alignment.
In the present embodiment, the alignment directions corresponding to two adjacent alignment regions are perpendicular, and the projection of each alignment direction on the liquid crystal panel forms an angle of 45 ° or 135 ° with the short side of the pixel 6.
Fig. 8a is a flowchart illustrating an irradiation of the first alignment film with ultraviolet light in the alignment method of the liquid crystal panel according to the embodiment of the invention. Fig. 8b is a flowchart illustrating irradiation of the second alignment film by ultraviolet light in the alignment method of the liquid crystal panel according to the embodiment of the invention.
Note that in the following description of the directions, the positive direction of the x-axis is designated as the 0 ° direction, and the angle of the alignment direction is recorded clockwise.
Specifically, each pixel 6 is divided into a first region 61a, a second region 62a, a third region 63a, and a fourth region 64a arranged in the longitudinal direction of the pixel 6 when the first alignment film 5a is irradiated. The first alignment film 5a is irradiated with ultraviolet light to align the liquid crystal layer 3, and the method specifically includes:
and S201, aligning the first region of the first alignment film along a first direction.
Specifically, when the alignment is performed along the first direction i11, the liquid crystal molecules in the liquid crystal layer 3 may be maintained in the same direction as the first direction i11 by controlling the irradiation angle of the ultraviolet light. Specifically, the first direction i11 is as shown in the figure, i.e. the first direction i11 is along the paper in the figure, and forms an angle with the long side and the short side of the pixel 6. Hereinafter, unless otherwise specified, the description will be given taking an example in which the alignment direction is along the paper plane direction in the drawing.
S202, aligning a second region of the first alignment film along a second direction, wherein an included angle is formed between the second direction and the first direction;
the included angle between the second direction i12 and the first direction i11 may be an acute angle or a right angle, that is, the included angle is greater than 0 ° and less than or equal to 90 °.
And S203, aligning the third region of the first alignment film along a third direction, wherein an included angle is formed between the third direction and the second direction.
The included angle between the third direction i13 and the second direction i12 may be an acute angle or a right angle, that is, the included angle is greater than 0 ° and less than or equal to 90 °.
And S204, aligning the fourth region of the first alignment film along a fourth direction, wherein an included angle is formed between the fourth direction and the third direction.
The included angle between the fourth direction i14 and the third direction i13 may be an acute angle or a right angle, that is, the included angle is greater than 0 ° and less than or equal to 90 °.
Specifically, when the second alignment film 5b is irradiated, each pixel 6 is divided into a first region 61b, a second region 62b, a third region 63b, and a fourth region 64b arranged in the longitudinal direction of the pixel 6. The second alignment film 5b is irradiated with ultraviolet light to align the liquid crystal layer 3, and the method specifically includes:
and S301, aligning the first region of the second alignment film along the first direction.
Specifically, when the alignment is performed along the first direction i21, the liquid crystal molecules in the liquid crystal layer 3 may be maintained in the same direction as the first direction i21 by controlling the irradiation angle of the ultraviolet light. Specifically, the first direction i21 is as shown in the figure, i.e. the first direction i21 is along the paper in the figure, and forms an angle with the long side and the short side of the pixel 6.
And S302, aligning the second region of the second alignment film along a second direction, wherein an included angle is formed between the second direction and the first direction.
The included angle between the second direction i22 and the first direction i21 may be an acute angle or a right angle, that is, the included angle is greater than 0 ° and less than or equal to 90 °.
And S303, aligning the third region of the second alignment film along a third direction, wherein an included angle is formed between the third direction and the second direction.
The included angle between the third direction i23 and the second direction i22 may be an acute angle or a right angle, that is, the included angle is greater than 0 ° and less than or equal to 90 °.
And S304, aligning along a fourth direction in a fourth area of the second alignment film, wherein an included angle is formed between the fourth direction and the third direction.
The included angle between the fourth direction i24 and the third direction i23 may be an acute angle or a right angle, that is, the included angle is greater than 0 ° and less than or equal to 90 °.
In order to further improve the light transmittance of the liquid crystal panel, in this embodiment, the alignment directions corresponding to two adjacent alignment regions are perpendicular to each other, and an included angle between each alignment direction and the short side of the pixel 6 is 45 °.
As shown in fig. 4 a-4 c, in some embodiments, the angle of the first direction i11 is 315 °, the angle of the second direction i12 is 225 °, the angle of the third direction i13 is 135 °, and the angle of the fourth direction i14 is 45 °; in some embodiments, the angle of the first direction i21 is 45 °, the angle of the second direction i22 is 135 °, the angle of the third direction i23 is 225 °, and the angle of the fourth direction i24 is 315 °.
As shown in fig. 5a to 5c, in other embodiments, the angle of the first direction i11 is 225 °, the angle of the second direction i12 is 315 °, the angle of the third direction i13 is 45 °, and the angle of the fourth direction i14 is 135 °; in other embodiments, the angle of the first direction i21 is 135 °, the angle of the second direction i22 is 45 °, the angle of the third direction i23 is 315 °, and the angle of the fourth direction i24 is 225 °
In this way, the second direction i12 is perpendicular to the third direction i13, or the second direction i22 is perpendicular to the third direction i23, so that the overlapped dark stripes can be prevented from being generated at the boundary between the second region 62a and the third region 63a, and the overlapped dark stripes can be prevented from being generated at the boundary between the second region 62b and the third region 63b, so as to improve the transmittance of the light of the liquid crystal panel.
As shown in fig. 6 and 7, in some embodiments, the angle of the first direction i11 is 315 °, the angle of the second direction i12 is 225 °, the angle of the third direction i13 is 135 °, and the angle of the fourth direction i14 is 45 °; in some embodiments, the angle of the first direction i21 is 45 °, the angle of the second direction i22 is 135 °, the angle of the third direction i23 is 225 °, and the angle of the fourth direction i24 is 315 °.
The alignment method of the liquid crystal panel provided by the embodiment is used for aligning the liquid crystal panel, and the alignment method includes the following steps: forming a first electrode on a first substrate, and forming a second electrode on a second substrate, wherein the first electrode and the second electrode are provided with pixels which are arranged oppositely, each pixel is divided into a plurality of orientation areas which are arranged along the long side direction of the pixel, the first electrode is provided with a plurality of slits, and the slits corresponding to at least two adjacent orientation areas are mutually communicated; forming an alignment film on the first electrode and the second electrode; irradiating the alignment film of one of the first electrode and the second electrode by using ultraviolet light to align the alignment film, wherein the alignment direction and the slit of the alignment film are parallel to each other, and the alignment directions corresponding to adjacent alignment regions in each pixel are not parallel to each other; a liquid crystal layer is formed on the alignment film. Therefore, when the liquid crystal panel is aligned by using the alignment method of the liquid crystal panel provided by the embodiment, the transmittance of light rays of the liquid crystal panel can be improved, and the display effect of the liquid crystal panel is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A liquid crystal panel, comprising: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein a first electrode is arranged on the first substrate, a second electrode is arranged on the second substrate, alignment films are arranged on the surfaces of the first electrode and the second electrode, the liquid crystal layer is arranged between the first electrode and the second electrode, the first substrate and the second substrate are provided with pixels which are arranged oppositely, each pixel is divided into a plurality of alignment areas which are arranged along the long side direction of the pixel, and the alignment directions corresponding to the adjacent alignment areas in each pixel are not parallel to each other;
the first electrode is provided with a plurality of slits, the slits and the alignment directions of the corresponding orientation regions are parallel to each other, and the slits corresponding to at least two adjacent orientation regions are communicated with each other.
2. The liquid crystal panel according to claim 1, wherein the plurality of alignment regions include a first region, a second region, a third region, and a fourth region arranged in a long side direction of the pixel;
the slits corresponding to the first region and the second region communicate with each other, and the slits corresponding to the third region and the fourth region communicate with each other.
3. The liquid crystal panel according to claim 2, wherein the slits corresponding to the second region and the third region do not communicate with each other.
4. The liquid crystal panel according to claim 2 or 3, wherein a storage capacitance line is further provided on the first substrate, and a position of at least a partial structure of the storage capacitance line corresponds to a position of a dark-streaked region in the pixel.
5. The liquid crystal panel according to claim 4, wherein the storage capacitance line includes a first extension and two second extensions, a middle portion of the second extensions being connected to the first extension; the first extension section is located in a junction area of the second area and the third area, and the positions of the two second extension sections correspond to the positions of two long sides of the pixel respectively.
6. The liquid crystal panel according to any of claims 1 to 3, wherein the width of the slit ranges between 2 μm and 5 μm;
and/or the distance between adjacent slits is between 2 and 5 μm.
7. A display device comprising the liquid crystal panel according to any one of claims 1 to 6.
8. An alignment method of a liquid crystal panel for aligning the liquid crystal panel according to any one of claims 1 to 6, comprising the steps of:
forming a first electrode on the first substrate, and forming a second electrode on the second substrate, wherein the first electrode and the second electrode have pixels arranged oppositely, each pixel is divided into a plurality of orientation regions arranged along the long side direction of the pixel, the first electrode is provided with a plurality of slits, and the slits corresponding to at least two adjacent orientation regions are communicated with each other;
forming an alignment film on the first electrode and the second electrode;
irradiating the alignment film of one of the first electrode and the second electrode by using ultraviolet light to align the alignment film, wherein the alignment direction of the alignment film and the slit are parallel to each other, and the alignment directions corresponding to adjacent alignment regions in each pixel are not parallel to each other;
and forming a liquid crystal layer on the alignment film.
9. The method according to claim 8, wherein the alignment directions corresponding to two adjacent alignment regions are perpendicular to each other, and an angle between a projection of each alignment direction on the liquid crystal panel and a short side of the pixel is 45 ° or 135 °.
10. The alignment method of the liquid crystal panel according to claim 8, wherein the plurality of alignment regions include a first region, a second region, a third region, and a fourth region arranged in a long side direction of the pixel;
before forming the first electrode on the first substrate, arranging a storage capacitance line, wherein the storage capacitance line comprises a first extension section and two second extension sections, and the middle part of each second extension section is connected with the first extension section; the first extension section is located in a junction area of the second area and the third area, and the positions of the two second extension sections correspond to the positions of two long sides of the pixel respectively.
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| CN113867052A (en) * | 2021-09-09 | 2021-12-31 | 京东方科技集团股份有限公司 | Light alignment method of display panel, display panel and display device |
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| CN112083605B (en) | 2022-11-29 |
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Address after: No. 1778, Qinglan Road, Huangjia Street, Shuangliu District, Chengdu, Sichuan 610200 Patentee after: Chengdu BOE Display Technology Co.,Ltd. Country or region after: China Address before: No. 1778, Qinglan Road, Gongxing street, Shuangliu District, Chengdu, Sichuan 610200 Patentee before: CHENGDU ZHONGDIAN PANDA DISPLAY TECHNOLOGY Co.,Ltd. Country or region before: China |