CN117590653A - Display panel, manufacturing method thereof and display device - Google Patents
Display panel, manufacturing method thereof and display device Download PDFInfo
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- CN117590653A CN117590653A CN202311805407.7A CN202311805407A CN117590653A CN 117590653 A CN117590653 A CN 117590653A CN 202311805407 A CN202311805407 A CN 202311805407A CN 117590653 A CN117590653 A CN 117590653A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 239000000758 substrate Substances 0.000 claims abstract description 110
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical group [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 14
- 238000010030 laminating Methods 0.000 claims description 2
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 19
- 230000009286 beneficial effect Effects 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 101150096839 Fcmr gene Proteins 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 2
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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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
- G02F1/1343—Electrodes
- G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
-
- 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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
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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)
- Liquid Crystal (AREA)
Abstract
The invention relates to the technical field of display, and discloses a display panel, a manufacturing method thereof and a display device, wherein the display panel comprises: the liquid crystal display comprises an array substrate, a color film substrate and a liquid crystal layer, wherein the array substrate and the color film substrate are oppositely arranged; the first polaroid and the second polaroid are oppositely arranged, the first polaroid is positioned at one side of the array substrate far away from the color film substrate, and the second polaroid is positioned at one side of the color film substrate far away from the array substrate; a first transparent electrode layer, which is positioned between the first polaroid and the second polaroid, the material of the first transparent electrode layer is indium tin oxide, and the thickness of the first transparent electrode layer is larger than or equal toThe invention improves the contrast ratio of a large visual angle and simultaneously effectively reduces the production cost.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a manufacturing method thereof and a display device.
Background
The liquid crystal display device has the advantages of no radiation, light weight, low power consumption and the like, and is widely applied to various information, communication and consumer electronic products. When the display panel is observed from an oblique direction, particularly in a large-angle oblique viewing angle direction, the birefringence of liquid crystal molecules in the liquid crystal layer is changed along with the change of the observation angle, so that the corresponding picture contrast and the picture definition are continuously reduced, the liquid crystal display panel usually has black state light leakage phenomenon, the large-viewing angle contrast is poor, and the display effect of the display device is affected.
Disclosure of Invention
In view of this, the present invention provides a display panel, a manufacturing method thereof, and a display device, which can improve the contrast ratio of a large viewing angle and effectively reduce the production cost.
The present invention provides a display panel, comprising: the liquid crystal display comprises an array substrate, a color film substrate and a liquid crystal layer, wherein the array substrate and the color film substrate are oppositely arranged; the first polaroid and the second polaroid are oppositely arranged, the first polaroid is positioned at one side of the array substrate far away from the color film substrate, and the second polaroid is positioned at one side of the color film substrate far away from the array substrate; a first transparent electrode layer, which is positioned between the first polaroid and the second polaroid, the material of the first transparent electrode layer is indium tin oxide, and the thickness of the first transparent electrode layer is larger than or equal to
Based on the same thought, the invention also provides a manufacturing method of the display panel, which comprises the following steps: providing an array substrate and a color film substrate; the array substrate and the color film substrate are arranged at the same position, and a liquid crystal layer is filled between the array substrate and the color film substrate; at least two layers of indium tin oxide are sequentially laminated in the display panel to form a first transparent electrode layer, wherein the thickness of the first transparent electrode layer is larger than or equal toThe first polaroid is attached to one side, far away from the color film substrate, of the array substrate, the second polaroid is attached to one side, far away from the array substrate, of the color film substrate, and the first transparent electrode layer is located between the first polaroid and the second polaroid.
Based on the same thought, the invention also provides a display device which comprises the display panel.
Compared with the prior art, the display panel, the manufacturing method thereof and the display device provided by the invention have the advantages that at least the following beneficial effects are realized:
the display panel provided by the invention comprises a first transparent electrode layer, wherein the material of the first transparent electrode layer is indium tin oxide, and the thickness of the first transparent electrode layer is greater than or equal toSo that the first transparent electrode layer has a significant optical anisotropy. The first transparent electrode layer is located between the first polaroid and the second polaroid, and the first transparent electrode layer can adjust the light rays of the non-positive viewing angle in the light rays passing through the first polaroid, so that most of the light rays can be absorbed by the second polaroid, the black state light leakage condition of the display panel under the inclined angle can be improved, the contrast ratio of the display panel viewed at the inclined viewing angle can be increased, and the display effect of the display panel viewed at the inclined viewing angle can be improved. Meanwhile, the indium tin oxide is a material frequently used in the display panel, the production cost is low, the forming method in the display panel is simple, the material adopted by the first transparent electrode layer is indium tin oxide, and the production cost of the display panel is effectively reduced while the display requirement on the display panel is met.
Of course, it is not necessary for any one product to practice the invention to achieve all of the technical effects described above at the same time.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic view of a display panel according to the prior art;
FIG. 2 is a schematic diagram of a display panel according to the present invention;
FIG. 3 shows light rays of different wavelengths passing through the film thicknessR0 schematic after the indium tin oxide layer;
FIG. 4 shows light rays of different wavelengths passing through the film thicknessRth schematic after indium tin oxide layer;
FIG. 5 is a graph showing diffraction peak intensities of light passing through indium tin oxide layers of different film thicknesses;
FIG. 6 is a schematic view of a path of light passing through a first polarizer and a second polarizer;
FIG. 7 is a schematic view of a path of light passing through a first polarizer, a first transparent electrode layer, and a second polarizer;
FIG. 8 is a schematic view of transmittance of an indium tin oxide layer at different film thicknesses;
FIG. 9 is a schematic diagram of another display panel according to the present invention;
FIG. 10 is a schematic view of a structure of another display panel according to the present invention;
FIG. 11 is a schematic view of a structure of another display panel according to the present invention;
FIG. 12 is a schematic plan view of a display panel according to still another embodiment of the present invention;
FIG. 13 is a cross-sectional view of the display panel of FIG. 12 taken along line A-A';
FIG. 14 is a schematic flow chart of a method for fabricating a display panel according to the present invention;
fig. 15 is a schematic plan view of a display device according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In order to realize normal display of the liquid crystal display panel, the liquid crystal display panel is generally provided with upper and lower polarizers at two sides thereof. The research shows that when the liquid crystal display panel is observed under a front view angle, the directions of the absorption axes of the upper polarizer and the lower polarizer are orthogonal (namely, mutually perpendicular) under the observation of the vertical direction, and the liquid crystal display panel is in a black state; however, when the liquid crystal display panel is observed at an oblique view angle, particularly at a large-angle view point, the directions of the absorption axes of the upper polarizer and the lower polarizer are in non-orthogonality (the included angle is larger than 90 degrees), so that black light leakage occurs to the liquid crystal display panel, and the display effect of the display device is affected. Fig. 1 is a schematic structural diagram of a display panel according to the prior art, referring to fig. 1, the display panel includes a liquid crystal box 1, two sides of the liquid crystal box 1 are respectively provided with an upper polarizer 2 and a lower polarizer 3, a compensation film 4 is disposed in the upper polarizer 2, the compensation film 4 in the upper polarizer 2 is generally disposed in a whole surface, and the situation that black light leakage occurs in the liquid crystal display panel under an inclination angle is relieved through the compensation film 4, so that the viewing angle of the liquid crystal display panel is increased. Of course, the compensation film 4 may be disposed in the lower polarizer 3, and will not be described in detail herein. The cost of the compensation film 4 is high, the production cost is increased due to the adoption of the polaroid with the compensation film in the liquid crystal display panel, and the improvement range of the black state light leakage condition of the liquid crystal display panel under the oblique angle is limited, so that the large breakthrough cannot be realized.
Based on the above study, the application provides a display panel, a manufacturing method thereof and a display device, and solves the problem that the production cost of the display panel in the prior art is high. The display panel with the technical effects provided by the application is described in detail as follows:
fig. 2 is a schematic structural diagram of a display panel according to the present invention, and referring to fig. 2, a display panel according to the present embodiment includes:
an array substrate 10 and a color film substrate 20 arranged opposite to each other, and a liquid crystal layer 30 between the array substrate 10 and the color film substrate 20;
the first polaroid 40 and the second polaroid 50 are oppositely arranged, the first polaroid 40 is positioned at one side of the array substrate 10 far away from the color film substrate 20, and the second polaroid 50 is positioned at one side of the color film substrate 20 far away from the array substrate 10;
a first transparent electrode layer 60, the first transparent electrode layer 60 is located between the first polarizer 40 and the second polarizer 50, the material of the first transparent electrode layer 60 is indium tin oxide, and the thickness of the first transparent electrode layer 60 is greater than or equal to
Specifically, the display panel provided in this embodiment is a liquid crystal display panel. The display panel includes an array substrate 10 and a color film substrate 20 disposed opposite to each other, and a liquid crystal layer 30 disposed between the array substrate 10 and the color film substrate 20. Alternatively, the liquid crystal layer 30 includes a plurality of liquid crystal molecules.
The display panel further includes a first polarizer 40 and a second polarizer 50 disposed opposite to each other, wherein the first polarizer 40 is located on a side of the array substrate 10 away from the color film substrate 20, the second polarizer 50 is located on a side of the color film substrate 20 away from the array substrate 10, i.e. the first polarizer 40 is a lower polarizer, and the second polarizer 50 is an upper polarizer. Subsequently, when the backlight module including the backlight source is disposed, the backlight module may be disposed on a side of the first polarizer 40 away from the second polarizer 50. The direction of the absorption axis of the first polarizer 40 and the direction of the absorption axis of the second polarizer 50 intersect. Alternatively, the direction of the absorption axis of the first polarizer 40 is perpendicular to the direction of the absorption axis of the second polarizer 50. In some alternative embodiments, the absorption axis of the first polarizer 40 is 0 ° and the absorption axis of the second polarizer 50 is 90 °. In some alternative implementations, the absorption axis of the second polarizer 50 may be set to 90 ° and the absorption axis of the first polarizer 40 may be set to 0 °.
It has been found that Indium Tin Oxide (ITO) is an Indium (III) oxide (In 2 O 3 ) And tin (group IV) oxide (SnO 2 ) When the thickness of the indium tin oxide layer increases, there is a slight birefringence effect, so that the indium tin oxide layer has a remarkable optical anisotropy. Exemplary, referring to FIGS. 3 and 4, FIG. 3 is a graph of light of different wavelengths passing through a film thicknessR0 after the ITO layer, FIG. 4 shows that light rays with different wavelengths pass through the film thickness of +.>Rth schematic after indium tin oxide layer, with reference to the following table:
as can be seen from fig. 3, 4 and the above table, when ITO1 is used, the Rth difference of light rays of three wavelengths is remarkable, and ITO1 has remarkable optical anisotropy.
Further, referring to fig. 5, fig. 5 is a schematic view showing diffraction peak intensities when light passes through the indium tin oxide layers with different film thicknesses, and it is known from fig. 5 that as the film thickness of the indium tin oxide layer increases, diffraction lattice intensity increases, and birefringence effect increases, i.e., polycrystalline grains are preferentially oriented so that very obvious optical anisotropy characteristics exist in the plane of the indium tin oxide layer. In particular, when the film thickness of the indium tin oxide layer isAnd the indium tin oxide layer has obvious optical anisotropy when the thickness is above.
The display panel provided in this embodiment further includes a first transparent electrode layer 60, the material of the first transparent electrode layer 60 is indium tin oxide, and the thickness of the first transparent electrode layer 60 is greater than or equal toSo that the first transparent electrode layer 60 has a significant optical anisotropy. The first transparent electrode layer 60 is located between the first polarizer 40 and the second polarizer 50, and the first transparent electrode layer 60 can adjust the light rays with non-positive viewing angles among the light rays passing through the first polarizer 40, so that most of the light rays can be absorbed by the second polarizer 50, thereby being beneficial to improving the condition that black light leakage occurs in the display panel under an inclined angle, increasing the contrast ratio when the display panel is watched at the inclined viewing angle, and improving the display effect when the display panel is watched at the inclined viewing angle.
Meanwhile, the indium tin oxide is a material frequently used in the display panel, the production cost is low, the forming method in the display panel is simple, the material adopted by the first transparent electrode layer 60 is indium tin oxide, and the production cost of the display panel is effectively reduced while the display requirement on the display panel is met.
Referring to fig. 6 and 7, fig. 6 is a schematic view illustrating a path of light passing through the first polarizer and the second polarizer, and fig. 7 is a schematic view illustrating a path of light passing through the first polarizer, the first transparent electrode layer and the second polarizer, wherein the first transparent electrode layer 60 can adjust the light of the non-positive viewing angle among the light passing through the first polarizer 40, so that most of the light can be absorbed by the second polarizer 50, thereby being beneficial to improving the black light leakage condition of the display panel at the oblique angle, thereby increasing the contrast ratio when the display panel is viewed at the oblique viewing angle, and improving the display effect when the display panel is viewed at the oblique viewing angle.
It should be noted that, in order to clearly illustrate the path of the light, the partial film layers in the display panel illustrated in fig. 6 and fig. 7 are illustrated by decomposition, and in the actual product, each film layer in the display panel may be set according to the actual requirement, which is not described herein.
It should be noted that the display panel provided by the embodiment of the present invention may be a display panel with various structures, for example, a display panel using positive liquid crystal or negative liquid crystal. The display device can also be a transverse electric field switching mode (In Plane Switching, IPS) or a boundary electric field switching technology (Fringe Field Switching, FFS) with a wide viewing angle, and the liquid crystal molecules are controlled to rotate in a plane parallel to the display panel by using a transverse electric field generated between the pixel electrode and the common electrode, so as to realize the display of the display panel.
With continued reference to FIG. 2, in some alternative embodiments, the thickness of the first transparent electrode layer 60 is less than or equal to
Specifically, referring to FIG. 8, FIG. 8 is a graph showing transmittance of ITO layers at different film thicknesses, and as can be seen from FIG. 8, when the thickness of the first transparent electrode layer 60 is greater thanIn this case, the thickness of the display panel is relatively thick, the cost of the first transparent electrode layer 60 is relatively high, and the light transmittance is relatively poor, which affects the display effect of the display panel.
The first transparent electrode layer 60 may be provided to have a thickness smaller thanThe problems of cost increase, excessive thickness of the display panel and poor display effect caused by excessive thickness of the first transparent electrode layer 60 are effectively avoided while the situation that black light leakage occurs to the display panel under an inclined angle is improved.
Optionally, the thickness of the first transparent electrode layer 60 is less than or equal toAt this time, while the situation that the black state light leakage of the display panel occurs under the inclination angle is improved, the transmission ratio of the first transparent electrode layer 60 is relatively high, which is beneficial to improving the display effect of the display panel. Of course, in the present inventionIn other embodiments, the thickness of the first transparent electrode layer 60 may be greater than or equal to ∈>And is less than or equal to->At this time, while the black light leakage of the display panel is improved at the tilt angle, the transmission of the first transparent electrode layer 60 is also relatively high, which is beneficial to improving the display effect of the display panel.
With continued reference to fig. 2, in some alternative embodiments, the first transparent electrode layer 60 is a continuous, unitary structure.
Specifically, in the display panel, when the first transparent electrode layer 60 is disposed between the first polarizer 40 and the second polarizer 50, the first transparent electrode layer 60 may be disposed on the side of the color film substrate 20 away from the array substrate 10, where the substrate 21 is located. Since the surface of the side of the substrate 21 of the color film substrate 20 away from the array substrate 10 is in a planar structure, the first transparent electrode layer 60 is disposed on the side of the substrate 21 of the color film substrate 20 away from the array substrate 10, and at least two layers of indium tin oxide are deposited on the surface of the side of the substrate 21 of the color film substrate 20 away from the array substrate 10 during the manufacturing process, so that the thickness of the indium tin oxide layer is as followsThe thickness is above, the manufacture is simple, and the process difficulty is low.
Of course, in other embodiments of the present invention, referring to fig. 9, fig. 9 is a schematic structural diagram of another display panel provided in the present invention, and the first transparent electrode layer 60 may also be disposed on a side of the substrate 11 of the array substrate 10 away from the color film substrate 20. Since the surface of the side of the substrate 11 away from the color film substrate 20 in the array substrate 10 is in a planar structure, the first transparent electrode layer 60 is disposed on the side of the substrate 11 away from the color film substrate 20 in the array substrate 10, and at least two layers of indium tin oxide are deposited on the surface of the side of the substrate 11 away from the color film substrate 20 in the array substrate 10 during the manufacturing process, so that the indium tin oxideThe thickness of the layer isThe thickness is above, the manufacture is simple, and the process difficulty is low.
With continued reference to fig. 2, in some alternative embodiments, the display panel further includes a transparent shielding layer 70, where the transparent shielding layer 70 is located on a side of the color film substrate 20 away from the array substrate 10, and a material of the transparent shielding layer 70 is indium tin oxide;
the transparent shielding layer 70 is multiplexed into the first transparent electrode layer 60.
Specifically, the display panel further includes a transparent shielding layer 70, the transparent shielding layer 70 is located on one side of the color film substrate 20 away from the array substrate 10, the transparent shielding layer 70 is made of indium tin oxide, the transparent shielding layer 70 can be grounded, and the transparent shielding layer 70 can effectively shield static electricity.
Since the transparent shielding layer 70 is located on the side of the color film substrate 20 away from the array substrate 10, that is, the transparent shielding layer 70 is located between the first polarizer 40 and the second polarizer 50, and the material of the transparent shielding layer 70 is indium tin oxide, the transparent shielding layer 70 can be reused as the first transparent electrode layer 60. The thickness of the transparent shielding layer 70 can be set toAnd the thickness can improve the condition that the display panel has black light leakage under the inclined angle, thereby increasing the contrast ratio when the display panel is watched at the inclined viewing angle and improving the display effect when the display panel is watched at the inclined viewing angle. Meanwhile, the multiplexing transparent shielding layer 70 is the first transparent electrode layer 60, which effectively reduces the thickness of the display panel and is beneficial to reducing the production cost.
It should be noted that, in this embodiment, the reusable transparent shielding layer 70 is exemplarily shown as the first transparent electrode layer 60, and in other embodiments of the present invention, other indium tin oxide film layers disposed on the whole surface may be reused as the first transparent electrode layer 60, which will not be described herein.
Fig. 10 is a schematic structural view of still another display panel according to the present invention, and referring to fig. 10, in some alternative embodiments, the first polarizer 40 includes a compensation film 80.
Specifically, the first polarizer 40 is provided with the compensation film 80, that is, the first polarizer 40 may adopt a polarizer including the compensation film 80, and the compensation film 80 may be used to further improve the black light leakage condition of the display panel under the oblique viewing angle, so as to increase the contrast ratio when the display panel is viewed under the oblique viewing angle, and improve the display effect when the display panel is viewed under the oblique viewing angle. In some alternative embodiments, compensation film 80 includes a negative B film and a positive B film. In some alternative embodiments, compensation film 80 includes a positive a film and a positive C film. That is, the compensation film 80 in the first polarizer 40 includes two compensation films (81, 82), and the two compensation films (81, 82) are respectively a negative B film (nz > nx > ny) and a positive B film (nz < ny < nx), or a positive a film (nz=ny < nx) and a positive C film (nz > nx=ny), wherein nx, ny, nz are refractive indexes of the compensation films in a three-dimensional coordinate system, that is, refractive index of x-axis is nx, refractive index of y-axis is ny, and refractive index of z-axis is nz.
It should be noted that, in other embodiments of the present invention, when the first polarizer 40 is a polarizer including the compensation film 80, the compensation film 80 in the first polarizer 40 may also be another type of compensation film, which is not described herein.
FIG. 11 is a schematic diagram of another display panel according to the present invention, and referring to FIG. 11, in some alternative embodiments, the second polarizer 50 includes a compensation film 80.
Similarly, specifically, the compensation film 80 is disposed in the second polarizer 50, that is, the second polarizer 50 may adopt a polarizer including the compensation film 80, and the compensation film 80 may be used to further improve the black light leakage condition of the display panel under the oblique viewing angle, so as to increase the contrast ratio when the display panel is viewed under the oblique viewing angle, and improve the display effect when the display panel is viewed under the oblique viewing angle. In some alternative embodiments, compensation film 80 includes a negative B film and a positive B film. In some alternative embodiments, compensation film 80 includes a positive a film and a positive C film. That is, the compensation film 80 in the first polarizer 40 includes two compensation films (81, 82), and the two compensation films (81, 82) are respectively a negative B film (nz > nx > ny) and a positive B film (nz < ny < nx), or a positive a film (nz=ny < nx) and a positive C film (nz > nx=ny).
It should be noted that, in other embodiments of the present invention, when the second polarizer 50 is a polarizer including the compensation film 80, the compensation film 80 in the second polarizer 50 may also be another type of compensation film, which is not described herein.
FIG. 12 is a schematic plan view of yet another display panel according to the present invention, FIG. 13 is a cross-sectional view of the display panel shown in FIG. 12 along line A-A', and referring to FIGS. 12 and 13, in some alternative embodiments, the display panel includes a display area AA and a non-display area NA surrounding the display area AA, the display area AA including a first display area AA1 and a second display area AA2;
the first transparent electrode layer 60 is located in the first display area AA1.
Specifically, the display panel includes a display area AA and a non-display area NA surrounding the display area AA, where the display area AA has a display function, the non-display area NA is not used for display, and structures such as circuit elements and wirings may be provided.
The display area AA includes a first display area AA1 and a second display area AA2, the display requirement of the second display area AA2 is lower than the display requirement of the first display area AA1 under the oblique viewing angle, further, in the display panel, the contrast requirement of the second display area AA2 under the oblique viewing angle is lower than the contrast requirement of the first display area AA1 under the oblique viewing angle, and at this time, the display requirement of the whole display panel is not affected by the arrangement of the first transparent electrode layer 60 in the first display area AA1. For example, when the display panel is used for vehicle-mounted display, the second display area AA2 in the display panel corresponds to the co-driving position, and for driving safety, it is not necessary to raise the contrast of the second display area AA2 when the display panel displays, when the display content of the area (the second display area AA 2) corresponding to the co-driving position in the display panel is viewable from the main driving position, that is, when the second display area AA2 in the display panel is viewable from an oblique angle of view (the main driving position). Therefore, the first transparent electrode layer 60 is only located in the first display area AA1, and the first transparent electrode layer 60 is not required to be disposed in the second display area AA2, that is, the first transparent electrode layer 60 is not required to be disposed in the whole display area AA, so that the production cost of the display panel is effectively reduced while the display requirement of the display panel is met.
Meanwhile, since the compensation film is generally disposed in the entire surface of the polarizer when the polarizer including the compensation film is used, the process difficulty is increased due to the partial disposition of the compensation film in the polarizer. In the display panel provided by the embodiment, when only the contrast of the first display area AA1 under the oblique viewing angle is required to be improved, at least two layers of indium tin oxide are directly deposited and laid in the area corresponding to the first display area AA1 in the display panel, so that the first transparent electrode layer 60 is only arranged in the first display area AA1, the manufacturing is simple, and the process difficulty is low. And when the polaroid is attached to the display panel in a contraposition mode, the risk of contraposition deviation exists in the polaroid, so that the risk of contraposition deviation exists between the compensation film and the first display area AA when the compensation film is locally arranged in the polaroid, and the display effect of the display panel is affected. In the display panel provided in this embodiment, at least two layers of indium tin oxide are directly deposited and laid in the area corresponding to the first display area AA1 in the display panel, so that the first transparent electrode layer 60 is only disposed in the first display area AA1, and the location of the first transparent electrode layer 60 is more accurate.
Alternatively, when the transparent shielding layer 70 is multiplexed as the first transparent electrode layer 60, the thickness of the portion of the transparent shielding layer 70 located in the second display area AA2 may be a conventionally set thickness, and the thickness of the portion of the transparent shielding layer 70 located in the first display area AA1 may be greater than or equal toExemplary, the thickness of the portion of the transparent shielding layer 70 located in the second display area AA2 is less than +.>In the manufacturing process, the thickness of the part of the bright shielding layer 70 located in the first display area AA1 is greater than or equal to ∈1 only by paving more layers of indium tin oxide on the area corresponding to the first display area AA1 in the display panel>The manufacturing method is simple and is beneficial to reducing the production cost.
Fig. 14 is a flow chart of a method for manufacturing a display panel according to the present invention, and referring to fig. 2 and 14, the present embodiment provides a method for manufacturing a display panel according to the foregoing embodiment. The manufacturing method comprises the following steps:
step S1, providing an array substrate and a color film substrate;
s2, the array substrate and the color film substrate are faced with a box, and a liquid crystal layer is filled between the array substrate and the color film substrate;
s3, laminating and laying at least two layers of indium tin oxide in the display panel to form a first transparent electrode layer, wherein the thickness of the first transparent electrode layer is larger than or equal to
And S4, attaching a first polaroid to one side of the array substrate far away from the color film substrate, attaching a second polaroid to one side of the color film substrate far away from the array substrate, and positioning a first transparent electrode layer between the first polaroid and the second polaroid.
The display panel manufactured by the manufacturing method of the display panel provided by the invention comprises the array substrate 10 and the color film substrate 20 which are oppositely arranged, and the liquid crystal layer 30 positioned between the array substrate 10 and the color film substrate 20. Alternatively, the liquid crystal layer 30 includes a plurality of liquid crystal molecules.
The display panel further includes a first polarizer 40 and a second polarizer 50 disposed opposite to each other, wherein the first polarizer 40 is located on a side of the array substrate 10 away from the color film substrate 20, the second polarizer 50 is located on a side of the color film substrate 20 away from the array substrate 10, i.e. the first polarizer 40 is a lower polarizer, and the second polarizer 50 is an upper polarizer. Subsequently, when the backlight module including the backlight source is disposed, the backlight module may be disposed on a side of the first polarizer 40 away from the second polarizer 50. The direction of the absorption axis of the first polarizer 40 and the direction of the absorption axis of the second polarizer 50 intersect. Alternatively, the direction of the absorption axis of the first polarizer 40 is perpendicular to the direction of the absorption axis of the second polarizer 50. In some alternative embodiments, the absorption axis of the first polarizer 40 is 0 ° and the absorption axis of the second polarizer 50 is 90 °. In some alternative implementations, the absorption axis of the second polarizer 50 may be set to 90 ° and the absorption axis of the first polarizer 40 may be set to 0 °.
When viewed from a front angle, light passing through the first polarizer 40 may be absorbed by the second polarizer 50. Under oblique viewing angles, the direction of the absorption axis of the first polarizer 40 and the direction of the absorption axis of the second polarizer 50 are not perpendicular, and black light leakage occurs, which results in lower contrast under oblique viewing angles. Wherein the front viewing angle means viewing in a direction perpendicular to the display panel, and the oblique viewing angle means viewing in a direction oblique to a direction perpendicular to the display plane.
At least two layers of indium tin oxide are laid in layers in the display panel to form a first transparent electrode layer, and the thickness of the first transparent electrode layer is larger than or equal to that of the first transparent electrode layerSo that the first transparent electrode layer 60 has a significant optical anisotropy. The first transparent electrode layer 60 is located between the first polarizer 40 and the second polarizer 50, and the first transparent electrode layer 60 can adjust the light rays with non-positive viewing angles among the light rays passing through the first polarizer 40, so that most of the light rays can be absorbed by the second polarizer 50, thereby being beneficial to improving the condition that black light leakage occurs in the display panel under an inclined angle, increasing the contrast ratio when the display panel is watched at the inclined viewing angle, and improving the display effect when the display panel is watched at the inclined viewing angle.
Meanwhile, the indium tin oxide is a material frequently used in the display panel, the production cost is low, the forming method in the display panel is simple, the display panel is directly deposited and paved, the material adopted by the first transparent electrode layer 60 is indium tin oxide, and the production cost of the display panel is effectively reduced while the display requirement of the display panel is met.
In some alternative embodiments, please refer to fig. 15, fig. 15 is a schematic plan view of a display device provided by the present invention, and a display device 1000 provided by the present embodiment includes a display panel 100 provided by the above-mentioned embodiments of the present invention. In the embodiment of fig. 15, the display device 1000 is described by taking an in-vehicle display device as an example, and it is to be understood that the display device 1000 provided in the embodiment of the present invention may be any other display device 1000 having a display function, such as a computer, a television, a mobile phone, etc., which is not particularly limited in this regard. The display device 1000 provided in the embodiment of the present invention has the beneficial effects of the display panel 100 provided in the embodiment of the present invention, and the specific description of the display panel 100 in the above embodiments may be referred to in the embodiments, and the description of the embodiment is omitted herein.
According to the embodiment, the display panel, the manufacturing method thereof and the display device provided by the invention have the following beneficial effects:
the display panel provided by the invention comprises a first transparent electrode layer, wherein the material of the first transparent electrode layer is indium tin oxide, and the thickness of the first transparent electrode layer is greater than or equal toSo that the first transparent electrode layer has a significant optical anisotropy. The first transparent electrode layer is located between the first polaroid and the second polaroid, and the first transparent electrode layer can adjust the light rays of the non-positive viewing angle in the light rays passing through the first polaroid, so that most of the light rays can be absorbed by the second polaroid, the black state light leakage condition of the display panel under the inclined angle can be improved, the contrast ratio of the display panel viewed at the inclined viewing angle can be increased, and the display effect of the display panel viewed at the inclined viewing angle can be improved. Meanwhile, the indium tin oxide is a material frequently used in the display panel, the production cost is low, the forming method in the display panel is simple, the material adopted by the first transparent electrode layer is indium tin oxide, and the production cost of the display panel is effectively reduced while the display requirement on the display panel is met.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A display panel, comprising:
the liquid crystal display comprises an array substrate, a color film substrate and a liquid crystal layer, wherein the array substrate and the color film substrate are oppositely arranged;
the first polaroid is positioned at one side of the array substrate far away from the color film substrate, and the second polaroid is positioned at one side of the color film substrate far away from the array substrate;
a first transparent electrode layer, the first transparent electrode layer is located between the first polaroid and the second polaroid, the material of the first transparent electrode layer is indium tin oxide, and the thickness of the first transparent electrode layer is greater than or equal to
2. The display panel of claim 1, wherein the display panel comprises,
the thickness of the first transparent electrode layer is less than or equal to
3. The display panel of claim 1, wherein the display panel comprises,
the first transparent electrode layer is of a continuous whole-surface structure.
4. The display panel of claim 1, wherein the display panel comprises,
the display panel further comprises a transparent shielding layer, wherein the transparent shielding layer is positioned on one side of the color film substrate, which is far away from the array substrate, and the transparent shielding layer is made of indium tin oxide;
the transparent shielding layer is multiplexed to the first transparent electrode layer.
5. The display panel of claim 1, wherein the display panel comprises,
the first polarizer or the second polarizer includes a compensation film.
6. The display panel of claim 5, wherein the display panel comprises,
the compensation film includes a negative B film and a positive B film.
7. The display panel of claim 5, wherein the display panel comprises,
the compensation film includes a positive a film and a positive C film.
8. The display panel of claim 5, wherein the display panel comprises,
the display panel comprises a display area and a non-display area surrounding the display area, wherein the display area comprises a first display area and a second display area;
the first transparent electrode layer is positioned in the first display area.
9. A method for manufacturing a display panel, comprising:
providing an array substrate and a color film substrate;
the array substrate and the color film substrate are faced with each other, and a liquid crystal layer is filled between the array substrate and the color film substrate;
sequentially laminating and laying at least two layers of indium tin oxide in the display panel to form a first transparent electrode layer, wherein the thickness of the first transparent electrode layer is larger than or equal to that of the first transparent electrode layer
And attaching a first polaroid to one side of the array substrate far away from the color film substrate, attaching a second polaroid to one side of the color film substrate far away from the array substrate, and positioning the first transparent electrode layer between the first polaroid and the second polaroid.
10. A display device, characterized in that the display device comprises a display panel according to any one of claims 1-8.
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| CN202311805407.7A CN117590653A (en) | 2023-12-25 | 2023-12-25 | Display panel, manufacturing method thereof and display device |
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