Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel comprises a first polarizer, an array substrate, a liquid crystal layer, a counter substrate and a second polarizer which are arranged in layers. The array substrate comprises a thin film transistor device layer, a color filter layer and an alignment layer. The alignment layer is arranged on the side of the color filter layer close to the counter substrate. At least part of the thin film transistor device layer is arranged on the side of the color filter layer away from the counter substrate. The array substrate further comprises a third polarizer arranged between the color filter layer and the alignment layer. The angle between the transmission axis of the third polarizer and the transmission axis of the second polarizer is within the range of 87 degrees to 93 degrees. The angle between the transmission axis of the third polarizer and the transmission axis of the first polarizer is within the range of -3 degrees to 3 degrees. The application can improve the contrast of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display panel and a display device. Background Technology

[0002] In the process of producing liquid crystal display panels using COA (Color Filter on Array) technology, a color filter layer containing R / G / B color resists is placed on one side of the array substrate. Light emitted from the backlight passes sequentially through the lower polarizer, the color filter layer containing R / G / B color resists, the liquid crystal layer, and the upper polarizer.

[0003] However, because the color filter layer scatters light, the polarization state of the linearly polarized light passing through the lower polarizer changes. When the light with the changed polarization state passes through the liquid crystal layer and the upper polarizer, dark-state light leakage occurs, reducing the contrast of the display panel.

[0004] Therefore, it is necessary to propose a new technical solution to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this application is to provide a display panel and a display device to improve the contrast of the display panel.

[0006] To solve the above problems, the technical solution of this application is as follows:

[0007] In a first aspect, this application proposes a display panel, comprising:

[0008] Array substrate;

[0009] The opposing substrate is disposed opposite to the array substrate;

[0010] A liquid crystal layer is disposed between the array substrate and the opposing substrate;

[0011] A first polarizer is disposed on the side of the array substrate away from the opposing substrate; and

[0012] The second polarizer is disposed on the side of the opposing substrate away from the array substrate;

[0013] The array substrate includes a thin-film transistor device layer, a color filter layer, and an alignment layer. The alignment layer is disposed on the side of the color filter layer close to the opposing substrate, and at least a portion of the thin-film transistor device layer is disposed on the side of the color filter layer away from the opposing substrate.

[0014] The array substrate further includes a third polarizer, which is disposed between the color filter layer and the alignment layer. The angle between the transmission axis of the third polarizer and the transmission axis of the second polarizer is in the range of 87 degrees to 93 degrees, and the angle between the transmission axis of the third polarizer and the transmission axis of the first polarizer is in the range of -3 degrees to 3 degrees.

[0015] In one embodiment of this application, the display panel further includes a planarization layer disposed between the color filter layer and the alignment layer;

[0016] The third polarizer is disposed on the side of the planarization layer near the alignment layer.

[0017] In one embodiment of this application, the color filter layer includes a plurality of color resist blocks;

[0018] The array substrate further includes:

[0019] A light-shielding layer is disposed on the side of the planarization layer near the alignment layer, the light-shielding layer having an opening, one of the openings exposing one of the color resist blocks; and

[0020] A first insulating layer is disposed on the side of the planarization layer near the alignment layer and covers the light-shielding layer;

[0021] The third polarizer is disposed on the side of the first insulating layer near the alignment layer.

[0022] In one embodiment of this application, the third polarizer includes a metal wire grid layer, and the angle between the transmission axis of the metal wire grid layer and the transmission axis of the second polarizer is in the range of 87 degrees to 93 degrees.

[0023] The metal wire grid layer includes a plurality of parallel and spaced metal strips, and the angle between the extension direction of the metal strips and the length direction of the transmission axis of the second polarizer is in the range of -3 degrees to 3 degrees.

[0024] The distance between two adjacent metal strips is the first distance, and the distance between the two sidewalls of the same opening along the arrangement direction of the multiple metal strips is the second distance. The first distance is smaller than the second distance.

[0025] In one embodiment of this application, the ratio of the first spacing to the second spacing is in the range of 2% to 8.75%.

[0026] In one embodiment of this application, the third polarizer further includes a plurality of filling portions, which fill the space between two adjacent metal strips, and the side of the filling portion away from the first polarizer is flush with the side of the metal strip away from the first polarizer.

[0027] In one embodiment of this application, the thin-film transistor device layer includes a plurality of thin-film transistors;

[0028] The array substrate further includes:

[0029] The second insulating layer is disposed on the side of the first insulating layer near the alignment layer, and the third polarizer is located between the second insulating layer and the first insulating layer;

[0030] Multiple pixel electrodes are disposed on the side of the second insulating layer near the alignment layer, and the pixel electrodes are electrically connected to the thin-film transistor;

[0031] A third insulating layer is disposed on the side of the second insulating layer near the alignment layer and covers the plurality of pixel electrodes; and

[0032] The common electrode is located on the side of the third insulating layer near the alignment layer.

[0033] In one embodiment of this application, the thin-film transistor device layer includes a plurality of thin-film transistors;

[0034] The array substrate further includes:

[0035] Multiple pixel electrodes are disposed on the side of the color filter layer near the alignment layer, and the pixel electrodes are electrically connected to the thin-film transistor;

[0036] A third insulating layer is disposed on the side of the pixel electrode near the alignment layer;

[0037] A common electrode is disposed on the side of the third insulating layer near the alignment layer; and

[0038] A fourth insulating layer is disposed on the side of the common electrode near the alignment layer;

[0039] The third polarizer is located between the fourth insulating layer and the alignment layer.

[0040] In one embodiment of this application, the transmission axis of the third polarizer is perpendicular to the transmission axis of the second polarizer, and the transmission axis of the third polarizer is parallel to the transmission axis of the first polarizer.

[0041] Secondly, this application proposes a display device, which includes a display panel. The display panel includes an array substrate, a counter substrate, a liquid crystal layer, a first polarizer, and a second polarizer. The counter substrate is disposed opposite to the array substrate. The liquid crystal layer is disposed between the array substrate and the counter substrate. The first polarizer is disposed on the side of the array substrate away from the counter substrate. The second polarizer is disposed on the side of the counter substrate away from the array substrate. The array substrate includes a thin-film transistor device layer, a color filter layer, and an alignment layer. The alignment layer is disposed on the side of the color filter layer close to the counter substrate, and at least a portion of the thin-film transistor device layer is disposed on the side of the color filter layer away from the counter substrate. The array substrate further includes a third polarizer, which is disposed between the color filter layer and the alignment layer. The angle between the transmission axis of the third polarizer and the transmission axis of the second polarizer is in the range of 87 degrees to 93 degrees, and the angle between the transmission axis of the third polarizer and the transmission axis of the first polarizer is in the range of -3 degrees to 3 degrees.

[0042] In one embodiment of this application, the display device further includes a backlight module, which is disposed on the side of the first polarizer away from the array substrate;

[0043] The light-emitting side of the backlight module is positioned facing the first polarizer.

[0044] In this application, because the color filter layer scatters light, the polarization state of the linearly polarized light passing through the first polarizer changes. This application addresses this by placing a third polarizer between the color filter layer and the alignment layer. This third polarizer further filters the light delayed after passing through the color filter, converting it into linearly polarized light. This repolarizes the light whose polarization state has changed, and the repolarized linearly polarized light then passes sequentially through the liquid crystal layer and the second polarizer. This improves the problem of dark-state light leakage caused by the scattering of light by the color filter layer in traditional display panels, thereby enhancing the contrast of the display panel. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of a first embodiment of the display panel of this application;

[0046] Figure 2 This is a schematic diagram of one embodiment of the third polarizer of this application;

[0047] Figure 3 This is a schematic diagram of a second embodiment of the display panel of this application;

[0048] Figure 4 This is a schematic diagram of a third embodiment of the display panel of this application;

[0049] Figure 5This is a schematic diagram of one embodiment of the display device of this application. Detailed Implementation

[0050] The terms used in this specification and claims have the meanings that are commonly understood by one of ordinary skill in the art to which this application pertains. The terms used in this specification and claims are for the purpose of facilitating the description and understanding of this application only, and are not intended to limit this application to the narrow interpretation of the specific terms used in the specification and claims.

[0051] Please see Figure 5 This application discloses a display device 1000, which can be a mobile phone, tablet computer, e-reader, electronic display screen, laptop computer, augmented reality (AR) / virtual reality (VR) display device 1000, media player, wearable device, digital camera, car navigation system, etc. The display device 1000 includes a display panel 100.

[0052] This application discloses a display panel 100, which may be a liquid crystal display (LCD) panel. The embodiments of this application are described using a liquid crystal display panel 100 as an example.

[0053] Because virtual reality display devices 1000 have very high requirements for resolution and display quality, in virtual reality display devices 1000 with pixel densities (Pixels Per Inch, PPI) as high as 1500 PPI or 1700 PPI, the size of the pixels is becoming smaller and smaller, which makes the electric field interference between pixels more obvious. This electric field interference affects the deflection of the liquid crystal, therefore, the contrast ratio of the virtual reality display device 1000 is lower than that of other display devices 1000, and the virtual reality display device 1000 is more prone to dark-state light leakage. This application improves the display panel 100 of the virtual reality display device 1000 to improve the dark-state light leakage problem of the high-resolution virtual reality display device 1000 and improve the contrast ratio of the virtual reality display device 1000.

[0054] Optional, please refer to Figure 1 The display panel 100 includes an array substrate 10, an opposing substrate 30, a liquid crystal layer 40, a first polarizer 50, and a second polarizer 60. The opposing substrate 30 is disposed opposite to the array substrate 10. The liquid crystal layer 40 is disposed between the array substrate 10 and the opposing substrate 30. The first polarizer 50 is disposed on the side of the array substrate 10 away from the opposing substrate 30. The second polarizer 60 is disposed on the side of the opposing substrate 30 away from the array substrate 10.

[0055] The array substrate 10 includes a thin-film transistor device layer 11, a color filter layer 12, and an alignment layer 13. The alignment layer 13 is disposed on the side of the color filter layer 12 closest to the opposing substrate 30, and at least a portion of the thin-film transistor device layer 11 is disposed on the side of the color filter layer 12 furthest from the opposing substrate 30.

[0056] The array substrate 10 also includes a third polarizer 14, which is disposed between the color filter layer 12 and the alignment layer 13.

[0057] Optionally, the angle between the transmission axis of the third polarizer 14 and the transmission axis of the second polarizer 60 is in the range of 87 degrees to 93 degrees, and the angle between the transmission axis of the third polarizer 14 and the transmission axis of the first polarizer 50 is in the range of -3 degrees to 3 degrees.

[0058] In this application, because the color filter layer 12 scatters light, the polarization state of the linearly polarized light passing through the first polarizer 50 changes. This application provides a third polarizer 14 between the color filter layer 12 and the alignment layer 13. The third polarizer 14 filters the light delayed after passing through the color filter again, converting it into linearly polarized light. This causes the light with the changed polarization state to be repolarized. The repolarized linearly polarized light then passes sequentially through the liquid crystal layer 40 and the second polarizer 60. This improves the problem of dark-state light leakage caused by the scattering of light by the color filter layer 12 in conventional display panels 100, thereby increasing the contrast of the display panel 100.

[0059] It's important to understand that the typical display modes of a liquid crystal display panel 100 can be divided into Normal Black mode and Normal White mode. Taking Normal White mode as an example, when no operating voltage is applied to the liquid crystal, the rod-shaped liquid crystal molecules are arranged in an almost flat position. In this state, light can pass through the first polarizer 50 and the second polarizer 60 to the maximum extent, resulting in a bright state. When voltage is applied to the liquid crystal, the liquid crystal will stand at different angles depending on the voltage. The higher the voltage, the steeper the angle of the liquid crystal, and the less light passes through the first polarizer 50 and the second polarizer 60. When the liquid crystal stands vertically, almost no light can pass through, resulting in a dark state. The display principle of a liquid crystal display panel mainly utilizes an electric field to control the orientation of liquid crystal molecules. The anisotropy of the refractive index of the liquid crystal causes changes in transmittance, thereby displaying images.

[0060] The linearly polarized light that passes through the first polarizer 50 is not scattered. After passing through the vertically standing liquid crystal, it cannot pass through the second polarizer 60. At this time, the contrast of the liquid crystal display panel is improved.

[0061] However, the linearly polarized light passing through the first polarizer 50 is scattered, which alters the polarization state of the light. At this point, some of the scattered light, after passing through the vertically positioned liquid crystal, can still pass through the second polarizer 60, resulting in dark-state light leakage and reducing the contrast of the display panel 100. This application aims to repolarize the scattered light, reduce the risk of dark-state light leakage, and improve the display effect.

[0062] Optionally, the transmission axis of the third polarizer 14 is perpendicular to the transmission axis of the second polarizer 60, and the transmission axis of the third polarizer 14 is parallel to the transmission axis of the first polarizer 50. In this case, the transmittance of the display panel 100 can be further improved, and the problem of dark light leakage of the display panel 100 can be mitigated.

[0063] However, it's important to understand that during the manufacturing process of the display panel 100, due to the influence of process precision, it's difficult to simultaneously ensure that the transmission axis of the third polarizer 14 is completely parallel to the transmission axis of the first polarizer 50, while also being completely perpendicular to the transmission axis of the second polarizer 60. Because of process fluctuations, the first polarizer 50, the second polarizer 60, and the third polarizer 14 cannot be accurately attached to their preset positions at preset angles. Furthermore, polarizer products may have precision errors, resulting in slight deviations between the actual transmission axis and the calibrated transmission axis. Therefore, when the angle between the transmission axes of the third polarizer 14 and the second polarizer 60 is within the range of 87 to 93 degrees, and the angle between the transmission axes of the third polarizer 14 and the first polarizer 50 is within the range of -3 to 3 degrees, the problem of dark-state light leakage in the display panel 100 can be further improved without affecting the transmittance of the display panel 100, thereby increasing the contrast of the display panel 100.

[0064] Optionally, the angle between the transmission axis of the third polarizer 14 and the transmission axis of the second polarizer 60 can be 87 degrees, 87.1 degrees, 87.2 degrees, 87.3 degrees, 87.4 degrees, 87.5 degrees, 87.6 degrees, 87.7 degrees, 87.8 degrees, 87.9 degrees, 88 degrees, 88.1 degrees, 88.2 degrees, 88.3 degrees, 88.4 degrees, 88.5 degrees, 88.6 degrees, 88.7 degrees, 88.8 degrees, 88.9 degrees, 89 degrees, 89.1 degrees, 89.2 degrees, 89.3 degrees, 89.4 degrees, 89.5 degrees, 89.6 degrees, or 89.7 degrees. The angles are one of the following values: 89.8 degrees, 89.9 degrees, 90 degrees, 90.1 degrees, 90.2 degrees, 90.3 degrees, 90.4 degrees, 90.5 degrees, 90.6 degrees, 90.7 degrees, 90.8 degrees, 90.9 degrees, 91 degrees, 91.1 degrees, 91.2 degrees, 91.3 degrees, 91.4 degrees, 91.5 degrees, 91.6 degrees, 91.7 degrees, 91.8 degrees, 91.9 degrees, 92 degrees, 92.1 degrees, 92.2 degrees, 92.3 degrees, 92.4 degrees, 92.5 degrees, 92.6 degrees, 92.7 degrees, 92.8 degrees, 92.9 degrees, and 93 degrees. The closer the angle between the transmission axis of the third polarizer 14 and the transmission axis of the second polarizer 60 is to 90 degrees, the greater the improvement in the contrast ratio of the display panel 100.

[0065] Optionally, the angle between the transmission axis of the third polarizer 14 and the transmission axis of the first polarizer 50 can be -3 degrees, -2.9 degrees, -2.8 degrees, -2.7 degrees, -2.6 degrees, -2.5 degrees, -2.4 degrees, -2.3 degrees, -2.2 degrees, -2.1 degrees, -2 degrees, -1.9 degrees, -1.8 degrees, -1.7 degrees, -1.6 degrees, -1.5 degrees, -1.4 degrees, -1.3 degrees, -1.2 degrees, -1.1 degrees, -1 degree, -0.9 degrees, -0.8 degrees, -0.7 degrees, -0.6 degrees, or -0 degrees. The values ​​are: -0.5 degrees, -0.4 degrees, -0.3 degrees, -0.2 degrees, -0.1 degrees, 0 degrees, 0.1 degrees, 0.2 degrees, 0.3 degrees, 0.4 degrees, 0.5 degrees, 0.6 degrees, 0.7 degrees, 0.8 degrees, 0.9 degrees, 1 degree, 1.1 degrees, 1.2 degrees, 1.3 degrees, 1.4 degrees, 1.5 degrees, 1.6 degrees, 1.7 degrees, 1.8 degrees, 1.9 degrees, 2 degrees, 2.1 degrees, 2.2 degrees, 2.3 degrees, 2.4 degrees, 2.5 degrees, 2.6 degrees, 2.7 degrees, 2.8 degrees, 2.9 degrees, and 3 degrees. The closer the transmission axis of the third polarizer 14 is to 0 degrees with that of the first polarizer 50, the greater the increase in transmittance of the display panel 100.

[0066] Please see Figure 5Optionally, the display device 1000 further includes a backlight module 200, which is disposed on the side of the first polarizer 50 away from the array substrate 10. The light-emitting side of the backlight module 200 is disposed facing the first polarizer 50.

[0067] Optionally, the backlight module 200 includes a lamp board. The lamp board includes multiple LEDs arranged in an array. Each LED includes a light-emitting chip. When the display screen of the display device 1000 is a dark screen, the power of the light-emitting chip can be reduced, thereby reducing the light output brightness of the backlight module 200, further improving the problem of light leakage in dark screens, and improving the contrast of the display device 1000.

[0068] Optionally, the angle between the transmission axis of the first polarizer 50 and the transmission axis of the second polarizer 60 is within the range of 87 degrees to 93 degrees. Specifically, the angle between the transmission axes of the first polarizer 50 and the second polarizer 60 takes values ​​of 87 degrees, 87.1 degrees, 87.2 degrees, 87.3 degrees, 87.4 degrees, 87.5 degrees, 87.6 degrees, 87.7 degrees, 87.8 degrees, 87.9 degrees, 88 degrees, 88.1 degrees, 88.2 degrees, 88.3 degrees, 88.4 degrees, 88.5 degrees, 88.6 degrees, 88.7 degrees, 88.8 degrees, 88.9 degrees, 89 degrees, 89.1 degrees, 89.2 degrees, 89.3 degrees, 89.4 degrees, 89.5 degrees, 89.6 degrees, and 89.7 degrees. The values ​​are 89.8°, 89.9°, 90°, 90.1°, 90.2°, 90.3°, 90.4°, 90.5°, 90.6°, 90.7°, 90.8°, 90.9°, 91°, 91.1°, 91.2°, 91.3°, 91.4°, 91.5°, 91.6°, 91.7°, 91.8°, 91.9°, 92°, 92.1°, 92.2°, 92.3°, 92.4°, 92.5°, 92.6°, 92.7°, 92.8°, 92.9°, and 93°. Due to limitations in manufacturing process precision, it is currently impossible to achieve perfect perpendicularity between the transmission axis of the first polarizer 50 and the transmission axis of the second polarizer 60. When the transmission axis of the first polarizer 50 and the transmission axis of the second polarizer 60 are within the range of 87 to 93 degrees, higher transmittance and contrast can be obtained, thereby improving the display effect. In particular, the closer the values ​​of the transmission axes of the first polarizer 50 and the second polarizer 60 are to 90 degrees, the greater the improvement in the contrast of the display panel 100.

[0069] Optionally, the opposing substrate 30 includes a glass substrate 32 and an optical adhesive layer 31. The optical adhesive layer 31 is disposed between the liquid crystal layer 40 and the glass substrate 32, and the glass substrate 32 is disposed between the second polarizer 60 and the optical adhesive layer 31.

[0070] Optionally, the thin-film transistor device layer 11 includes a plurality of thin-film transistors.

[0071] Optionally, the array substrate 10 further includes multiple pixel electrodes, a third insulating layer 20, and a common electrode 21. The pixel electrodes are disposed between the color filter layer 12 and the alignment layer 13, the third insulating layer 20 is disposed between the pixel electrodes and the alignment layer 13, and the common electrode 21 is disposed between the third insulating layer 20 and the alignment layer 13. One pixel electrode corresponds to one pixel, and one thin-film transistor is electrically connected to one pixel electrode. The film layer containing the multiple pixel electrodes is defined as the pixel electrode layer 19, and the material of the pixel electrodes and the common electrode 21 includes transparent indium tin oxide (ITO).

[0072] Optionally, the alignment layer 13 may be made of polyimide.

[0073] Optionally, the third polarizer 14 can be an absorptive polarizer. An absorptive polarizer is a polarizer formed by coating a dichroic dye. The dichroic dye can be one or more compounds selected from iodine, azo, anthraquinone, and naphthimide compounds.

[0074] Optional, please refer to Figure 2 The third polarizer 14 can also be a wire grid polarizer. Wire grid polarizers can be formed by nanoimprinting on the surface of a metal thin film.

[0075] Optionally, the third polarizer 14 includes a metal wire grid layer 141, the angle between the transmission axis of the metal wire grid layer 141 and the transmission axis of the second polarizer 60 being in the range of 87 degrees to 93 degrees.

[0076] Optionally, the metal wire grid layer 141 includes a plurality of parallel and spaced metal strips 142, the angle between the extension direction Y of the metal strips 142 and the length direction of the transmission axis of the second polarizer 60 is in the range of -3 degrees to 3 degrees.

[0077] When the third polarizer 14 is a metal wire grid polarizer, it has higher transmittance and higher polarization degree compared to polarizers formed by dichroic dyes.

[0078] It is important to understand that when unpolarized light is incident on the metal wire grid layer 141, the polarized light component parallel to the extension direction Y of the metal strip 142 is reflected by the metal wire grid layer 141 or absorbed because of the work done on the internal electrons of the metal strip 142, while the polarized light component parallel to the arrangement direction X of the metal strip 142 continues to propagate through the metal wire grid layer 141, thus obtaining polarized light.

[0079] Optionally, the extension direction Y of the metal strip 142 is perpendicular to the arrangement direction X of the plurality of metal strips 142. Since the transmission axis of the metal wire grid layer 141 is parallel to the arrangement direction X of the plurality of metal strips 142, and the transmission axis of the metal wire grid layer 141 needs to be perpendicular to the transmission axis of the second polarizer 60, therefore, the arrangement direction X of the plurality of metal strips 142 is perpendicular to the transmission axis of the second polarizer 60, and the extension direction Y of the metal strips 142 is parallel to the transmission axis of the second polarizer 60. In this embodiment, the problem of light leakage in dark states can be further improved, and the contrast of the display panel 100 can be enhanced.

[0080] Optionally, in the manufacturing process of the display panel 100 without forming the metal wire grid layer 141 on a metal thin film using nanoimprinting, the third polarizer 14 further includes a substrate 143, the substrate 143 being made of glass. The metal wire grid layer 141 is disposed on one side of the substrate 143. In the process of setting the third polarizer 14, the third polarizer 14, including the substrate 143 and the metal wire grid layer 141, is disposed on the corresponding film layer, thereby improving the flatness of the metal wire grid layer 141 and protecting the metal wire grid layer 141 from damage, so as to ensure that its polarization degree meets the working requirements.

[0081] Optionally, the third polarizer 14 also includes a filling portion. The filling portion fills the space between two adjacent metal strips 142, and the side of the filling portion is connected to the side of the metal strip 142. The side of the filling portion away from the first polarizer 50 is flush with the side of the metal strip 142 away from the first polarizer 50.

[0082] Since the metal wire grid layer 141 is formed by multiple metal strips 142 spaced apart, the distance between two adjacent spaced metal strips 142 is a first distance L1. The presence of the first distance L1 affects the flatness of other film layers above the third polarizer 14, thereby reducing the forward light emission efficiency of the display panel 100. In this embodiment, by filling the gaps between two adjacent metal strips 142, the step difference caused by the spaced arrangement of multiple metal strips 142 is eliminated, the flatness of other film layers above the third polarizer 14 is improved, and thus the forward light emission efficiency of the display panel 100 is improved.

[0083] The material used for filling the gap can be optically clear adhesive (OCA).

[0084] Please see Figure 1 In the first embodiment of this application:

[0085] Optionally, the color filter includes multiple color resist blocks 12a. The color resist blocks 12a can be one of red, green, or blue. The different colors of the color resist blocks 12a are made of different materials, and in the actual manufacturing process, the different thicknesses of the different colors of the color resist blocks 12a can affect the flatness of other film layers located above the color filter, thereby affecting the forward light emission efficiency of the display panel 100.

[0086] Optionally, the display panel 100 further includes a planarization layer 15. The planarization layer 15 is disposed between the color filter layer 12 and the alignment layer 13, and the third polarizer 14 is disposed on the side of the planarization layer 15 near the alignment layer 13. In this embodiment, by providing the planarization layer 15 on the side of the color filter layer 12 near the alignment layer 13, the flatness of the third polarizer 14 disposed above the planarization layer 15 is improved, eliminating the step difference caused by the different thicknesses between the color resist blocks 12a of different colors, improving the flatness of the third polarizer 14 and other film layers located above the color filter layer 12, thereby improving the forward light emission efficiency of the display panel 100.

[0087] Optionally, the display panel 100 further includes a second insulating layer 18, a plurality of pixel electrodes, a third insulating layer 20, and a common electrode 21. The second insulating layer 18 is disposed on the side of the third polarizer 14 near the alignment layer 13. The plurality of pixel electrodes are disposed on the side of the second insulating layer 18 near the alignment layer 13. The third insulating layer 20 is disposed on the side of the second insulating layer 18 near the alignment layer 13 and covers the plurality of pixel electrodes. The common electrode 21 is disposed on the side of the third insulating layer 20 near the alignment layer 13. The pixel electrodes are electrically connected to the thin-film transistors of the thin-film transistor device layer 11 to control the deflection of the liquid crystal.

[0088] In this embodiment, the third polarizer 14 is disposed on the side of the pixel electrode away from the alignment layer 13. When the third polarizer 14 is a metal wire grid polarizer, the interference of the metal wire grid polarizer on the liquid crystal deflection electric field can be reduced, thereby improving the contrast and display effect of the display panel 100.

[0089] In one manufacturing process of the display panel 100, after a planarization layer 15 is formed on the color filter layer 12, a metal thin film is formed on the planarization layer 15. The metal thin film is then subjected to nanoimprint processing to form a third polarizer 14, which includes a metal grid layer 141.

[0090] In another process of manufacturing the display panel 100, after forming a planarization layer 15 on the color filter layer 12, a third polarizer 14 including a substrate 143 and a metal wire grid layer 141 is disposed on the planarization layer 15.

[0091] Please see Figure 3 In the second embodiment of this application:

[0092] To avoid redundancy, the second embodiment of this application will describe the parts that differ from the first embodiment of this application.

[0093] The second embodiment of this application differs from the first embodiment of this application in that:

[0094] Optionally, the array substrate 10 further includes a light-shielding layer 16 and a first insulating layer 17. The light-shielding layer is disposed on the side of the planarization layer 15 near the alignment layer 13. The first insulating layer 17 is disposed on the side of the planarization layer 15 near the alignment layer 13 and covers the light-shielding layer 16. A third polarizer 14 is disposed on the side of the first insulating layer 17 near the alignment layer 13.

[0095] Optionally, the material of the light-shielding layer 16 may include a metal. The metal may include at least one of molybdenum, chromium, iron, aluminum, and copper.

[0096] Optionally, the material of the light-shielding layer 16 includes a metal oxide. The metal oxide includes at least one of iron oxide, molybdenum oxide, and aluminum oxide.

[0097] Alternatively, the material of the light-shielding layer 16 may be a silicide. The silicide includes molybdenum silicide.

[0098] Optionally, the light-shielding layer 16 can be a black matrix (BM) layer, the material of which includes black organic photoresist.

[0099] Optionally, the light-blocking layer 16 is provided with an opening 16a, one opening 16a exposing a color resist block 12a.

[0100] A light-shielding layer 16, including multiple openings 16a, is provided between the third polarizer 14 and the color filter layer 12. This reduces crosstalk between different colors of light from adjacent pixels, improving display quality. Furthermore, polarized light passing through the first polarizer 50 is scattered by the color filter layer 12, resulting in light emitted at multiple angles. These angles form angles with the normal direction. Smaller angles of light emission from the display panel 100 increase the forward light intensity, thus improving display quality. Conversely, larger angles of light emission from the display panel 100 cause color shift, affecting display quality. By providing the light-shielding layer 16, the light emitted from larger angles can be initially filtered out, reducing the impact of color shift on display quality.

[0101] When the material of the light-shielding layer 16 is metal, metal has a high reflectivity. The light-shielding layer 16 can reflect and reuse light emitted from a wide viewing angle that has passed through the color filter layer 12, avoiding absorption of light emitted from a wide viewing angle or crosstalk to adjacent pixels, thereby improving the transmittance and contrast of the display panel 100.

[0102] Optionally, the distance between the two sidewalls of the same opening 16a along the arrangement direction X of the multiple metal strips 142 is the second distance L2. Within a certain range, as the second distance L2 decreases, the light that can pass through the large angle of the opening 16a also decreases, and the initial filtering effect of the opening 16a on the light emitted from the large angle of the opening becomes stronger.

[0103] Optionally, in the metal wire grid layer 141, the gap between two adjacent metal strips 142 is formed as a first gap portion, the width of which is a first spacing L1. At least one of the first gap portions has a partial orthographic projection on the light-shielding layer 16 located within the area where the opening 16a is located.

[0104] Optionally, the first spacing L1 is smaller than the second spacing L2. Since the metal grid layer 141 is formed by nanoimprinting, and the opening 16a is formed by patterning on the light-shielding layer 16, the patterning process includes dry etching, wet etching, photoresist etching, plasma etching, etc., and the specific processing method is related to the material of the light-shielding layer 16. Therefore, the first spacing L1 between two adjacent metal strips 142 is smaller than the second spacing L2 of the opening 16a.

[0105] It is understood that the gap between the two sidewalls of the opening 16a along the X-direction of the metal strips 142 forms a second gap. The first gap and the second gap at least partially overlap in the thickness direction of the display panel 100. The first spacing L1 is smaller than the second spacing L2, which can be understood as a design of overlapping large and small holes, where the second gap is a large hole and the first gap is a small hole. The opening 16a performs preliminary filtering of light from wide viewing angles. When the material of the light-shielding layer 16 is metal, the light-shielding layer 16 reflects and reuses light with excessively large emission angles, avoiding the impact of wide-viewing-angle light on the display effect while reusing the wide-viewing-angle light. When the light that has passed through the opening 16a reaches the metal wire grid layer 141, only light that meets the preset emission angle can pass through the second gap between two adjacent metal strips 142 in the metal light-shielding layer 16. The second gap serves to filter light again to ensure that wide-viewing-angle light is filtered out as much as possible, further improving the contrast and display effect of the display panel 100.

[0106] Optionally, the ratio of the first spacing L1 to the second spacing L2 is in the range of 2% to 8.75%.

[0107] When the ratio of the first pitch L1 to the second pitch L2 is within the above-mentioned range, the filtering effect on light from a wide viewing angle is better, which can improve the contrast and display effect of the display panel 100. The ratio of the first pitch L1 to the second pitch L2 is within the range of 2%, 2.25%, 2.5%, 2.75%, 3%, 3.25%, 3.5%, 3.75%, 4%, 4.25%, 4.5%, 4.75%, 5%, 5.25%, 5.5%, 5.75%, 6%, 6.25%, 6.5%, 6.75%, 7%, 7.25%, 7.5%, 7.75%, 8%, 8.25%, 8.5%, and 8.75%.

[0108] When the display panel 100 of this application is used in a high-resolution virtual reality display device 1000, the pixel density of the high-resolution virtual reality display device 1000 is 1700 PPI. In the 1700 PPI display panel 100, the value of the first pitch L1 ranges from 50 nanometers to 140 nanometers, and the value of the second pitch L2 ranges from 1600 nanometers to 2500 nanometers. While reducing the first pitch L1 increases the polarization degree, it also reduces the light output at certain viewing angles. Therefore, the first pitch L1 needs to be specifically set according to the transmittance and contrast requirements of the actual product. When the value of the first pitch L1 is between 80 nanometers and 120 nanometers, a better balance can be achieved between transmittance and contrast.

[0109] In order to improve the flatness of the film layer above the light-shielding layer 16, a filling portion can be filled in the opening 16a. The side of the filling portion in the opening 16a away from the first polarizer 50 is flush with the side of the light-shielding layer 16 away from the first polarizer 50.

[0110] In one manufacturing process of the display panel 100, after forming a first insulating layer 17 on the light-shielding layer 16, a metal thin film is formed on the first insulating layer 17. The metal thin film is then subjected to nanoimprint processing to form a third polarizer 14, which includes a metal grid layer 141.

[0111] In another process of manufacturing the display panel 100, after forming the first insulating layer 17 on the light-shielding layer 16, a third polarizer 14 including a substrate 143 and a metal wire grid layer 141 is disposed on the first insulating layer 17.

[0112] Please see Figure 4 In the third embodiment of this application:

[0113] To avoid redundancy, the third embodiment of this application will describe the parts that differ from the first and second embodiments of this application.

[0114] The second embodiment of this application differs from the first and second embodiments of this application in that:

[0115] Optionally, the array substrate 10 further includes a fourth insulating layer 22, which is disposed on the side of the common electrode 21 near the alignment layer 13. A third polarizer 14 is disposed between the fourth insulating layer 22 and the alignment layer 13.

[0116] In this embodiment, the third polarizer 14 is disposed close to the alignment layer 13. This allows linearly polarized light passing through the third polarizer 14 to directly reach the liquid crystal layer 40, reducing the path distance of the linearly polarized light to the liquid crystal layer 40. This avoids the linearly polarized light being scattered or interfered with by other film layers located between the third polarizer 14 and the liquid crystal layer 40, thereby improving the contrast and display effect of the display panel 100.

[0117] In one process of manufacturing the display panel 100, after forming a fourth insulating layer 22 on the common electrode 21, a metal thin film is formed on the fourth insulating layer 22, and the metal thin film is subjected to nanoimprint processing to form a third polarizer 14, the third polarizer 14 including a metal grid layer 141.

[0118] In another process of manufacturing the display panel 100, after forming the fourth insulating layer 22 on the light-shielding layer 16, a third polarizer 14 including a substrate 143 and a metal wire grid layer 141 is disposed on the fourth insulating layer 22.

[0119] Optionally, the materials of the first insulating layer 17, the second insulating layer 18, the third insulating layer 20, and the fourth insulating layer 22 include at least one of silicon oxide, silicon nitride, and silicon oxynitride.

[0120] Please see Figure 5 This application proposes a display device 1000.

[0121] To avoid redundancy, the display device 1000 of this application will describe the parts that are different from the display panel 100 of the third embodiment of this application.

[0122] The display device 1000 includes a display panel 100 and a backlight module 200, wherein the backlight module 200 is disposed on the side of the first polarizer 50 away from the array substrate 10. The light-emitting side of the backlight module 200 is disposed facing the first polarizer 50.

[0123] The specific embodiments of this application have been described in detail above. The embodiments disclosed above are merely preferred embodiments of this application. Those skilled in the art can make many modifications and improvements without departing from the concept of this application. All such modifications and improvements fall within the scope of protection defined by the claims of this application.

Claims

1. A display panel, characterized in that, include: Array substrate; The opposing substrate is disposed opposite to the array substrate; A liquid crystal layer is disposed between the array substrate and the opposing substrate; A first polarizer is disposed on the side of the array substrate away from the opposing substrate; The second polarizer is disposed on the side of the opposing substrate away from the array substrate; as well as Planarization layer; A light-shielding layer is disposed on the side of the planarization layer near the alignment layer, the light-shielding layer has an opening, and the material of the light-shielding layer includes metal; The array substrate includes a thin-film transistor device layer, a color filter layer, and an alignment layer. The alignment layer is disposed on the side of the color filter layer close to the opposing substrate, and at least a portion of the thin-film transistor device layer is disposed on the side of the color filter layer away from the opposing substrate. The color filter layer includes a plurality of color resist blocks, and the thickness of the color resist blocks of different colors is different. The planarization layer is disposed between the color filter layer and the alignment layer, and one opening exposes one color resist block. The array substrate further includes a third polarizer disposed between the color filter layer and the alignment layer. The angle between the transmission axis of the third polarizer and the transmission axis of the second polarizer is in the range of 87 degrees to 93 degrees, and the angle between the transmission axis of the third polarizer and the transmission axis of the first polarizer is in the range of -3 degrees to 3 degrees. The third polarizer is disposed on the side of the planarization layer near the alignment layer. The third polarizer includes a metal wire grid layer, which includes a plurality of parallel and spaced metal strips. The spacing between two adjacent metal strips is a first spacing, and the spacing between the two sidewalls of the same opening along the arrangement direction of the plurality of metal strips is a second spacing. The ratio of the first spacing to the second spacing is in the range of 2% to 8.75%.

2. The display panel as described in claim 1, characterized in that, The array substrate further includes: A first insulating layer is disposed on the side of the planarization layer near the alignment layer and covers the light-shielding layer; The third polarizer is disposed on the side of the first insulating layer near the alignment layer.

3. The display panel as described in claim 2, characterized in that, The angle between the transmission axis of the metal wire grid layer and the transmission axis of the second polarizer is in the range of 87 degrees to 93 degrees. The angle between the extending direction of the metal strip and the length direction of the transmission axis of the second polarizer is within the range of -3 degrees to 3 degrees.

4. The display panel as described in claim 3, characterized in that, The third polarizer also includes a plurality of filling portions, which fill the space between two adjacent metal strips. The side of the filling portion away from the first polarizer is flush with the side of the metal strip away from the first polarizer.

5. The display panel as described in any one of claims 2-4, characterized in that, The thin-film transistor device layer includes a plurality of thin-film transistors; The array substrate further includes: The second insulating layer is disposed on the side of the first insulating layer near the alignment layer, and the third polarizer is located between the second insulating layer and the first insulating layer; Multiple pixel electrodes are disposed on the side of the second insulating layer near the alignment layer, and the pixel electrodes are electrically connected to the thin-film transistor; A third insulating layer is disposed on the side of the second insulating layer near the alignment layer and covers the plurality of pixel electrodes; and The common electrode is located on the side of the third insulating layer near the alignment layer.

6. The display panel as described in any one of claims 1-4, characterized in that, The thin-film transistor device layer includes a plurality of thin-film transistors; The array substrate further includes: Multiple pixel electrodes are disposed on the side of the color filter layer near the alignment layer, and the pixel electrodes are electrically connected to the thin-film transistor; A third insulating layer is disposed on the side of the pixel electrode near the alignment layer; A common electrode is disposed on the side of the third insulating layer near the alignment layer; and A fourth insulating layer is disposed on the side of the common electrode near the alignment layer; The third polarizer is located between the fourth insulating layer and the alignment layer.

7. The display panel as described in any one of claims 1-4, characterized in that, The transmission axis of the third polarizer is perpendicular to the transmission axis of the second polarizer, and the transmission axis of the third polarizer is parallel to the transmission axis of the first polarizer.

8. A display device, characterized in that, The display device includes a display panel as claimed in any one of claims 1-7.

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