Display device

Abstract

A display device includes a liquid crystal panel, a first polarizer, a second polarizer, a gate line polarizing layer, and a backlight module. The liquid crystal panel includes a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate. The liquid crystal panel is between the first polarizer and the second polarizer. The gate line polarizing layer is between the first polarizer and the second polarizer. The gate line polarizing layer includes a first gate line structure and a second gate line structure. The first gate line structure overlaps the liquid crystal layer, the first polarizer, and the second polarizer. The second gate line structure overlaps the second polarizer and does not overlap the first polarizer. The backlight module overlaps the first polarizer, the liquid crystal panel, the gate line polarizing layer, and the second polarizer.

Description

Technical Field

[0001] This invention relates to a display device. Background Technology

[0002] Currently, most LCD panels on the market have an upper substrate, a lower substrate, and a liquid crystal layer located between the two substrates. Generally, two polarizers are attached to the upper and lower substrates of the LCD panel, respectively, and the polarization direction of light is changed by rotating the liquid crystal molecules in the liquid crystal layer, thereby controlling whether light passes through. Summary of the Invention

[0003] The purpose of this invention is to provide a display device that can improve the problem of uneven brightness in the displayed image.

[0004] At least one embodiment of the present invention provides a display device. The display device includes a liquid crystal panel, a first polarizer, a second polarizer, a gate line polarizing layer, and a backlight module. The liquid crystal panel includes a first substrate, a second substrate, and a liquid crystal layer located between the first substrate and the second substrate. The liquid crystal panel is located between the first polarizer and the second polarizer. The transmission axis of the first polarizer is perpendicular to the transmission axis of the second polarizer. The gate line polarizing layer is located between the first polarizer and the second polarizer. The gate line polarizing layer includes a first gate line structure and a second gate line structure. The first gate line structure overlaps the liquid crystal layer, the first polarizer, and the second polarizer in the normal direction of the first substrate. The second gate line structure overlaps the second polarizer in the normal direction of the first substrate but does not overlap the first polarizer. The transmission axis of the first gate line structure is perpendicular to the transmission axis of the second gate line structure. The backlight module overlaps the first polarizer, the liquid crystal panel, the gate line polarizing layer, and the second polarizer in the normal direction of the first substrate.

[0005] Based on the above, by setting up a grid polarizing layer, the problem of uneven brightness of the display screen caused by the shrinkage of the polarizer after long-term use or after being heated can be improved. Attached Figure Description

[0006] Figure 1 This is a partial cross-sectional schematic diagram of a display device according to an embodiment of the present invention.

[0007] Figure 2 This is a top view schematic diagram of a first substrate of a display device according to an embodiment of the present invention.

[0008] Figure 3 This is a partial cross-sectional schematic diagram of a display device according to an embodiment of the present invention.

[0009] Figure 4 This is a partial cross-sectional schematic diagram of a display device according to an embodiment of the present invention.

[0010] Figure 5 This is a partial top view of a first substrate of a display device according to an embodiment of the present invention.

[0011] Figure 6 This is a partial cross-sectional schematic diagram of a display device according to an embodiment of the present invention.

[0012] Figure 7 yes Figure 6 The curves showing the penetration rate of the cover plate in different penetration zones.

[0013] Figures 8A to 8D This is a partial cross-sectional schematic diagram of a method for manufacturing a grid line polarizing layer according to an embodiment of the present invention.

[0014] Figure 9 These are reliability test data graphs of the grid line polarizing layer and polyvinyl alcohol polarizer according to some embodiments of the present invention.

[0015] The attached figures are labeled as follows:

[0016] 10, 20, 30, 40: Display devices

[0017] 11: Screen display area

[0018] 12: Thematic Lighting Area

[0019] 100: LCD panel

[0020] 110: First substrate

[0021] 112, 122: Carrier plate

[0022] 114: Pixel Array

[0023] 116, 119: Drive circuit

[0024] 118: Fan-out circuit

[0025] 120: Second substrate

[0026] 124: Color filter element

[0027] 130: Liquid Crystal Layer

[0028] 140: Frame adhesive

[0029] 210: First polarizer

[0030] 220: Second polarizer

[0031] 300: Grid line polarizing layer

[0032] 300': Metal material layer

[0033] 310: First gate structure

[0034] 312, 322: Metal grid lines

[0035] 320: Second grid line structure

[0036] 410: Protective layer

[0037] 420: Optical adhesive layer

[0038] 500: Backlight Module

[0039] 501: First luminous area

[0040] 502: Second luminescent area

[0041] 503: Third luminescent zone

[0042] 504: Fourth luminescent zone

[0043] 505: Fifth luminous area

[0044] 510: First circuit board

[0045] 512: White light-emitting element

[0046] 520: Second circuit board

[0047] 522, 524, 526: Colored light-emitting elements

[0048] 600: Cover plate

[0049] 611: First Penetration Zone

[0050] 612: Second Penetration Zone

[0051] 613: Third Penetration Zone

[0052] 614: Fourth Penetration Zone

[0053] 615: Fifth Penetration Zone

[0054] 700: Optical film

[0055] D1: First Direction

[0056] D2: Second Direction

[0057] DL: Data cable

[0058] M: Mold

[0059] ND: Normal direction

[0060] P1: First photoresist strip

[0061] P2: Second photoresist strip

[0062] PH: Spacing

[0063] PR photoresist layer

[0064] PR': Cured photoresist pattern

[0065] SL: Scan a line

[0066] T: Thickness

[0067] TP: Adapter signal cable

[0068] W: Width Detailed Implementation

[0069] Figure 1 This is a partial cross-sectional schematic diagram of a display device 10 according to an embodiment of the present invention. Please refer to... Figure 1 The display device 10 includes a liquid crystal panel 100, a first polarizer 210, a second polarizer 220, a grid line polarizing layer 300, and a backlight module 500. In this embodiment, the display device 10 also includes a protective layer 410, an optical adhesive layer 420, a cover plate 600, and an optical film 700.

[0070] The liquid crystal panel 100 includes a first substrate 110, a second substrate 120, and a liquid crystal layer 130 located between the first substrate 110 and the second substrate 120. The first substrate 110 and the second substrate 120 are bonded together by a sealant 140.

[0071] The first substrate 110 is a pixel array substrate and includes a carrier plate 112, a pixel array 114, a driving circuit 116, and a fan-out line 118. The pixel array 114, the driving circuit 116, and the fan-out line 118 are disposed on the carrier plate 112. The second substrate 120 includes a carrier plate 122 and a color filter element 124. The color filter element 124 is disposed on the carrier plate 122. Figure 1 In the diagram, the pixel array 114, driving circuit 116, fan-out line 118, and color filter element 124 are all simply represented by rectangles. This invention does not limit the specific structure of the pixel array 114, driving circuit 116, fan-out line 118, and color filter element 124.

[0072] The carrier plates 112 and 122 are, for example, rigid substrates, and their material can be glass, quartz, organic polymers, or other suitable materials. However, the invention is not limited thereto, and in other embodiments, the carrier plates 112 and 122 can also be flexible substrates or stretchable substrates. For example, the materials of flexible substrates and stretchable substrates include polyimide (PI), polydimethylsiloxane (PDMS), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyester (PES), polymethylmethacrylate (PMMA), polycarbonate (PC), polyurethane (PU), or other suitable materials.

[0073] In this embodiment, the frame adhesive 140 is annular, and the pixel array 114, color filter element 124, and liquid crystal layer 130 are disposed inside the frame adhesive 140, but this is not a limitation of the invention. In other embodiments, a portion of the color filter element 124 extends to the outside of the frame adhesive 140. In this embodiment, the driving circuit 116 and / or fan-out line 118 partially overlap the frame adhesive 140. In some embodiments, the frame adhesive 140 comprises a transparent material, but this is not a limitation of the invention.

[0074] A gate line polarizing layer 300 is located on the first substrate 110. In this embodiment, the gate line polarizing layer 300 is located on the side of the carrier plate 112 facing away from the liquid crystal layer 130, but the invention is not limited thereto. In other embodiments, the gate line polarizing layer 300 is located on the side of the carrier plate 112 facing the liquid crystal layer 130. The gate line polarizing layer 300 includes a first gate line structure 310 and a second gate line structure 320. The penetration axis of the first gate line structure 310 is perpendicular to the penetration axis of the second gate line structure 320. For example, the first gate line structure 310 includes a plurality of metal gate lines extending along a first direction, and the second gate line structure 320 includes a plurality of metal gate lines extending along a second direction, wherein the first direction is perpendicular to the second direction. In some embodiments, the material of the gate line polarizing layer 300 is a single-layer or multi-layer structure, and includes aluminum, other metal materials, or stacked layers of the aforementioned materials.

[0075] The protective layer 410 is located on the side of the carrier plate 112 opposite to the liquid crystal layer 130. In this embodiment, a portion of the protective layer 410 covers the gate line polarizing layer 300, but this is not a limitation of the invention. In other embodiments, the protective layer 410 does not cover the gate line polarizing layer 300. In some embodiments, the thickness of the protective layer 410 is 500 angstroms to 1500 angstroms.

[0076] The liquid crystal panel 100 is located between the first polarizer 210 and the second polarizer 220. The first polarizer 210 and the second polarizer 220 are respectively disposed on the first substrate 110 and the second substrate 120. In this embodiment, the first polarizer 210 is disposed on the protective layer 410, and the gate line polarizing layer 300 is located between the first polarizer 210 and the second polarizer 220. In this embodiment, the area of ​​the first polarizer 210 is smaller than the area of ​​the second polarizer 220. The first gate line structure 310 overlaps the liquid crystal layer 130, the first polarizer 210, and the second polarizer 220 in the normal direction ND of the first substrate 110. The second gate line structure 320 overlaps the second polarizer 220 in the normal direction ND of the first substrate 110 but does not overlap the first polarizer 210.

[0077] In this embodiment, the first polarizer 210 and the second polarizer 220 include a polyvinyl alcohol (PVA) polarizing film, a triacetate cellulose film (TAC) polarizing film, or other types of polymer polarizing films. The transmission axis of the first polarizer 210 is perpendicular to the transmission axis of the second polarizer 220.

[0078] The backlight module 500 is disposed on the back side of the liquid crystal panel 100, and overlaps the first polarizer 210, the liquid crystal panel 100, the gate polarizer layer 300 and the second polarizer 220 on the normal direction ND of the first substrate 110.

[0079] The backlight module 500 includes a first circuit board 510, a second circuit board 520, a white light-emitting element 512, and colored light-emitting elements 522, 524, and 526. In this embodiment, the white light-emitting element 512 is disposed on the first circuit board 510, and the colored light-emitting elements 522, 524, and 526 are disposed on the second circuit board 520. In some embodiments, the first circuit board 510 and the second circuit board 520 are separate from each other. In other embodiments, the white light-emitting element 512 and the colored light-emitting elements 522, 524, and 526 are disposed on the same circuit board. The white light-emitting element 512 and the colored light-emitting elements 522, 524, and 526 are, for example, light-emitting diodes (LEDs). In other words, the white light-emitting element 512 is a white LED, and the colored light-emitting elements 522, 524, and 526 are colored LEDs. In some embodiments, the colored light-emitting elements 522, 524, and 526 are a red LED, a green LED, and a blue LED, respectively.

[0080] In this embodiment, the backlight module 500 has a first light-emitting area 501, a second light-emitting area 502, a third light-emitting area 503, a fourth light-emitting area 504, and a fifth light-emitting area 505. The first light-emitting area 501 overlaps with the first polarizer 210, the pixel array 114, the liquid crystal layer 130, and the second polarizer 220 in the normal direction ND, but does not overlap with the gate polarizer layer 300. The second light-emitting area 502 overlaps with the first polarizer 210, the pixel array 114, the first gate structure 310, the liquid crystal layer 130, and the second polarizer 220 in the normal direction ND, but does not overlap with the second gate structure 320. The third light-emitting area 503 and the fourth light-emitting area 504 overlap with the second gate structure 320 and the second polarizer 220 in the normal direction ND, but do not overlap with the first gate structure 310. In this embodiment, the third light-emitting region 503 also overlaps with the driving circuit 116, and the fourth light-emitting region 504 also overlaps with the fan-out line 118. The fifth light-emitting region 505 does not overlap with the first polarizer 210, the grid polarizer layer 300, and the second polarizer 220 in the normal direction ND.

[0081] In this embodiment, the first light-emitting area 501 and the second light-emitting area 502 are located in the screen display area of ​​the display device 10, while the third light-emitting area 503, the fourth light-emitting area 504, and the fifth light-emitting area 505 are located in the ambient light area of ​​the display device 10. In some embodiments, the distribution density of light-emitting diodes (i.e., color light-emitting elements 522, 524, 526) in the second light-emitting area 502, the third light-emitting area 503, the fourth light-emitting area 504, and the fifth light-emitting area 505 is less than the distribution density of pixels in the pixel array 214 of the liquid crystal panel 100.

[0082] In this embodiment, the design of the grid polarizing layer 300 can mitigate the impact of problems caused by polarizers in high-temperature and high-humidity environments on the displayed image. Specifically, the first polarizer 210 and the second polarizer 220 may shrink inward after being exposed to high temperatures, causing some of the first polarizers 210 in the second light-emitting area 502 to shift, and some of the second polarizers 220 in the fourth light-emitting area 504 to shift. Since the grid polarizing layer 300 is less prone to thermal shrinkage, the uneven brightness of the displayed image caused by polarizer shrinkage can be mitigated by the grid polarizing layer 300. Furthermore, compared to polarizers, the polarization rate of the grid polarizing layer 300 is less affected by temperature and humidity; therefore, the grid polarizing layer 300 can also mitigate problems caused by a decrease in polarization rate of polarizers.

[0083] In some embodiments, the transmittance of each individual polarizer and individual grid polarizer layer is approximately 40%. If the polarizer and grid polarizer layer are stacked together, and the polarizer and grid polarizer layer have parallel transmission axes, the transmittance will only decrease from approximately 40% to approximately 36% (meaning that approximately 90% transmittance is still retained). In other words, stacking polarizers with parallel transmission axes and grid polarizer layers together has little impact on transmittance. In this embodiment, above the second light-emitting region 502, the transmission axis of the first grid structure 310 is parallel to the transmission axis of the first polarizer 210; above the third light-emitting region 503 and the fourth light-emitting region 504, the transmission axis of the second grid structure 320 is parallel to the transmission axis of the second polarizer 220. Therefore, the impact of the grid polarizer layer 300 on the transmittance of the display device 10 can be reduced. Even if the first polarizer 210 shrinks due to heat, causing a portion of the first grid line structure 310 to not overlap with the first polarizer 210, the brightness of the display device 10 corresponding to the position of the second light-emitting area 502 will not change significantly. Similarly, even if the second polarizer 220 shrinks due to heat, causing a portion of the second grid line structure 320 to not overlap with the second polarizer 220, the brightness of the display device 10 corresponding to the position of the fourth light-emitting area 504 will not change significantly.

[0084] Optical film 700 may be selectively disposed between backlight module 500 and liquid crystal panel 100. Optical film 700 may be a single-layer or multi-layer structure, and may be, for example, a quantum dot enhancement film (QDEF), a phosphor film, a diffuser film, a diffuser plate, a light guide film, a prism film, a dual brightness enhancement film (DBEF), a diffraction film, or other optical films or combinations thereof.

[0085] The cover plate 600 is located on the front side of the liquid crystal panel 100. In this embodiment, the cover plate 600 is attached to the second polarizer 220 by an optical adhesive layer 420. The material of the cover plate 600 includes glass, polymethyl methacrylate, or other suitable materials. In this embodiment, the composition of the cover plate 600 is adjusted so that the cover plate 600 includes multiple transmissive areas with different transmittances. In this embodiment, the cover plate 600 includes a first transmissive area 611, a second transmissive area 612, a third transmissive area 613, a fourth transmissive area 614, and a fifth transmissive area 615 with different transmittances. In this embodiment, the first transmissive area 611, the second transmissive area 612, the third transmissive area 613, the fourth transmissive area 614, and the fifth transmissive area 615 overlap with the first light-emitting area 501, the second light-emitting area 502, the third light-emitting area 503, the fourth light-emitting area 504, and the fifth light-emitting area 505, respectively.

[0086] In this embodiment, the transmittance of the display device 10 is affected by many factors. For example, the polarizer, the grid polarizing layer, the aperture ratio of the lines, and the color filter elements all affect the transmittance of the display device 10. In this embodiment, the configuration of the display device 10 is shown in Table 1 below.

[0087] Table 1

[0088]

[0089] As shown in Table 1, the cover plate 600 allows for more consistent transmittance across different areas of the display device 10, thereby improving image continuity. In this embodiment, the transmittance of the second penetration area 612 is greater than that of the first penetration area 611, the transmittance of the first penetration area 611 is greater than that of the third penetration area 613, the transmittance of the third penetration area 613 is greater than that of the fourth penetration area 614, and the transmittance of the fourth penetration area 614 is greater than that of the fifth penetration area 615. In some embodiments, the transmittance of the cover plate 600 is gradual. Specifically, the transmittance varies gradually between different penetration areas.

[0090] Figure 2 This is a top view schematic diagram of a first substrate of a display device according to an embodiment of the present invention. For example, Figure 2 For example is Figure 1 A top view of the first substrate 110.

[0091] Please refer to Figure 2 The first substrate 110 is a pixel array substrate and includes a carrier plate 112, a pixel array 114, a driving circuit 116, a fan-out line 118, and a driving circuit 119. The pixel array 114, driving circuit 116, fan-out line 118, and driving circuit 119 are all located on the carrier plate. In this embodiment, each pixel in the pixel array 114 includes a storage capacitor and a thin-film transistor. The driving circuit 116 is a gate driving circuit and is formed on the carrier plate 112. The driving circuit 116 is electrically connected to the pixel array 114 via a scan line SL. The driving circuit 119 is, for example, an external chip and / or circuit board. The driving circuit 119 is electrically connected to the pixel array 114 via a data line DL.

[0092] In this embodiment, a portion of the pixel array 114 is located in the screen display area 11 of the display device, and another portion of the pixel array 114 is located in the ambient light area 12 of the display device. In addition, the driving circuit 116, the fan-out line 118, and the driving circuit 119 are also located in the ambient light area 12.

[0093] Figure 3 This is a partial cross-sectional schematic diagram of a display device 20 according to an embodiment of the present invention. It should be noted that... Figure 3 The embodiments follow Figure 1 The component reference numerals and partial contents of the embodiments are described below, wherein the same or similar reference numerals are used to represent the same or similar components, and descriptions of the same technical content are omitted. For explanations of the omitted parts, please refer to the foregoing embodiments, and will not be repeated here.

[0094] Figure 3 The display device 20 and Figure 1The main difference of the display device 10 is that the color filter element 124 of the display device 20 extends to the outside of the frame adhesive 140.

[0095] Please refer to Figure 3 In this embodiment, the first light-emitting area 501 to the fourth light-emitting area 504 of the backlight module 500 are all superimposed on the color filter element 124. The configuration of the display device 20 is shown in Table 2 below.

[0096] Table 2

[0097]

[0098] As shown in Table 2, the cover plate 600 allows for more consistent transmittance in different areas of the display device 20, thereby improving image continuity. In this embodiment, the transmittance of the third penetration area 613 is greater than that of the fourth penetration area 614, the transmittance of the fourth penetration area 614 is greater than that of the second penetration area 612, the transmittance of the second penetration area 612 is greater than that of the first penetration area 611, and the transmittance of the first penetration area 611 is greater than that of the fifth penetration area 615.

[0099] Figure 4 This is a partial cross-sectional schematic diagram of a display device 30 according to an embodiment of the present invention. It should be noted that... Figure 4 The embodiments follow Figure 1 The component reference numerals and partial contents of the embodiments are described below, wherein the same or similar reference numerals are used to represent the same or similar components, and descriptions of the same technical content are omitted. For explanations of the omitted parts, please refer to the foregoing embodiments, and will not be repeated here.

[0100] Figure 4 The display device 30 and Figure 1 The main difference between the display device 10 and the display device 30 is that the driving circuit 116 of the first substrate 110 of the display device 30 is not disposed on both sides of the pixel array 114 (e.g., Figure 5 (As shown).

[0101] Please refer to Figure 4 In this embodiment, the second light-emitting area 502 of the backlight module 500 is disposed adjacent to the fourth light-emitting area 504. The configuration of the display device 30 is shown in Table 3 below.

[0102] Table 3

[0103]

[0104] As shown in Table 3, the cover plate 600 can make the transmittance of the display device 30 more consistent in different areas, thereby improving the continuity of the image. In this embodiment, the transmittance of the second penetration area 612 is greater than that of the first penetration area 611, the transmittance of the first penetration area 611 is greater than that of the fourth penetration area 614, and the transmittance of the fourth penetration area 614 is greater than that of the fifth penetration area 615.

[0105] Figure 5 This is a partial top view of a first substrate of a display device according to an embodiment of the present invention. For example, Figure 5 For example is Figure 4 A top view of the first substrate 110.

[0106] Please refer to Figure 5 The first substrate 110 is a pixel array substrate and includes a carrier plate 112, a pixel array 114, a driving circuit 116, a fan-out line 118, and a driving circuit 119. The pixel array 114, driving circuit 116, fan-out line 118, and driving circuit 119 are all located on the substrate. In this embodiment, each pixel in the pixel array 114 includes a storage capacitor and a thin-film transistor. The driving circuit 116 is electrically connected to the scan line SL via a transition signal line TP, and is also electrically connected to the pixel array 114 via the scan line SL. The driving circuit 119 is, for example, an external chip and / or circuit board. The driving circuit 119 is electrically connected to the pixel array 114 via a data line DL. In this embodiment, the driving circuit 116 is disposed between the pixel array 114 and the driving circuit 119, thereby reducing the bezel width of the display device.

[0107] Figure 6 This is a partial cross-sectional schematic diagram of a display device 40 according to an embodiment of the present invention. It should be noted that... Figure 6 The embodiments follow Figure 4 The component reference numerals and partial contents of the embodiments are described below, wherein the same or similar reference numerals are used to represent the same or similar components, and descriptions of the same technical content are omitted. For explanations of the omitted parts, please refer to the foregoing embodiments, and will not be repeated here.

[0108] Figure 6 The display device 40 and Figure 4 The main difference of the display device 30 is that the color filter element 124 of the display device 40 extends to the outside of the frame adhesive 140.

[0109] Please refer to Figure 6 In this embodiment, the first light-emitting area 501, the second light-emitting area 502, and the fourth light-emitting area 504 of the backlight module 500 are all superimposed on the color filter element 124. The configuration of the display device 40 is shown in Table 4 below.

[0110] Table 4

[0111]

[0112] As shown in Table 4, the cover plate 600 can make the transmittance of the display device 40 more consistent in different areas, thereby improving the continuity of the image. In this embodiment, the transmittance of the fourth transmission area 614 is greater than that of the second transmission area 612, the transmittance of the second transmission area 612 is greater than that of the first transmission area 611, and the transmittance of the first transmission area 611 is greater than that of the fifth transmission area 615.

[0113] Figure 7 yes Figure 6 The curves show the transmittance of the cover plate in different penetration zones. Please refer to them. Figure 7 In this embodiment, the penetration rate of different penetration zones varies gradually, and the penetration rate presents a smooth curve. Figure 7 The transmittance of the first penetration zone 611, the second penetration zone 612, the fourth penetration zone 614, and the fifth penetration zone 615 is displayed. However, the transmittance of different penetration zones can be adjusted according to actual needs.

[0114] Figures 8A to 8D This is a partial cross-sectional schematic diagram of a method for manufacturing a grid line polarizing layer according to an embodiment of the present invention. For example, Figures 8A to 8D This is a cross-sectional schematic diagram of the manufacturing method of the grid line polarizing layer of the display device in any of the foregoing embodiments.

[0115] Please refer to Figure 8A A metal material layer 300' is formed on the carrier plate 112. The metal material layer 300' can have a single-layer or multi-layer structure. A photoresist layer PR is formed on the metal material layer 300'.

[0116] Please refer to Figure 8A and Figure 8B The pattern of the mold M is transferred to the photoresist layer PR by pressing the mold M onto the photoresist layer PR using nanoimprint (NIL) technology.

[0117] Please refer to Figure 8C The photoresist layer PR is cured to form a cured photoresist pattern PR'. The cured photoresist pattern PR' includes multiple first photoresist strips P1 extending along a first direction D1 and multiple second photoresist strips P2 extending along a second direction D2.

[0118] Please refer to Figure 8C and Figure 8DUsing the cured photoresist pattern PR' as a mask, a metal material layer 300' is etched to form a gate line polarizing layer 300. The gate line polarizing layer 300 includes a first gate line structure 310 and a second gate line structure 320. The penetration axis of the first gate line structure 310 is perpendicular to the penetration axis of the second gate line structure 320. The first gate line structure 310 includes multiple metal gate lines 312 extending along a first direction D1, and the second gate line structure 320 includes multiple metal gate lines 322 extending along a second direction D2.

[0119] In some embodiments, the spacing PH between metal gate line 312 and metal gate line 322 is 50 to 150 nanometers. In some embodiments, the width W of metal gate line 312 and metal gate line 322 is 50 to 100 nanometers. In some embodiments, the thickness T of metal gate line 312 and metal gate line 322 is greater than 50 nanometers.

[0120] Table 5 provides the Ts, Tp, extinction ratio, and polarization ratio of the grid line polarizing layer and polyvinyl alcohol polarizer in some embodiments of the present invention, where Tp is the transmitted light intensity (nits) of two overlapping polyvinyl alcohol polarizers (or two overlapping grid line polarizing layers) with parallel transmission axes, and Ts is the transmitted light intensity (nits) of two overlapping polyvinyl alcohol polarizers (or two overlapping grid line polarizing layers) with perpendicular transmission axes. Polarization ratio = (Tp - Ts) / (Tp + Ts), extinction ratio = Tp / Ts. In the embodiments of the present invention, the polarization ratios of the grid line polarizing layer and polyvinyl alcohol polarizer are both greater than 99.95%.

[0121] Table 5

[0122] Ts Tp Extinction ratio polarizability Polyvinyl alcohol polarizing film 0.0410 1,720 41,951 99.995％ gate line polarizing layer 0.0334 1,727 51,707 99.996％

[0123] Figure 9 These are reliability test data graphs for the grid line polarizing layer and polyvinyl alcohol polarizer according to some embodiments of the present invention. Figure 9 In this context, T0 refers to the polarizability of the grid line polarizing layer and the polyvinyl alcohol polarizer before reliability testing begins, as shown in Table 5. Figure 9 In this context, T1000 refers to the polarization of the grid line polarizer and the polyvinyl alcohol polarizer under specific conditions ( Figure 9 The polarization after 1000 hours of treatment (condition 1 or condition 2). Figure 9 In the above conditions, condition 1 is to place the grid line polarizing layer and the polyvinyl alcohol polarizer in an environment of 105°C, and condition 2 is to place the grid line polarizing layer and the polyvinyl alcohol polarizer in an environment of 85°C and 85% humidity.

[0124] To reduce experimental errors, three grid line polarizing layers with the same structure, WGP1, WGP2, and WGP3, and three polyvinyl alcohol polarizers with the same structure, POL1, POL2, and POL3, were provided for testing.

[0125] from Figure 9 It can be seen that the grid polarizing layers WGP1, WGP2, and WGP3 are better able to withstand high temperature and high humidity environments than the polyvinyl alcohol polarizers POL1, POL2, and POL3.

[0126] In summary, in the display device of the present invention, the problem of uneven brightness of the display screen caused by polarizer shrinkage can be improved by setting the grid polarizer layer, and the adverse effects of the decrease in polarization rate of the polarizer in high temperature and high humidity environment on the display device can be solved.

Claims

1. A display device, comprising: A liquid crystal panel includes a first substrate, a second substrate, and a liquid crystal layer located between the first substrate and the second substrate; A first polarizer and a second polarizer, wherein the liquid crystal panel is located between the first polarizer and the second polarizer, wherein the transmission axis of the first polarizer is perpendicular to the transmission axis of the second polarizer; A grid line polarizing layer is located between the first polarizer and the second polarizer, wherein the grid line polarizing layer includes: A first gate structure is superimposed on the liquid crystal layer, the first polarizer, and the second polarizer in a normal direction of the first substrate; and A second gate line structure, overlapping the second polarizer but not the first polarizer in the normal direction of the first substrate, wherein the penetration axis of the first gate line structure is perpendicular to the penetration axis of the second gate line structure; and A backlight module is superimposed on the first polarizer, the liquid crystal panel, the gate polarizing layer and the second polarizer in the normal direction of the first substrate; The backlight module includes a first light-emitting area, a second light-emitting area, and a third light-emitting area. The first light-emitting area overlaps with the first polarizer, the liquid crystal layer, and the second polarizer. The second light-emitting area overlaps with the first polarizer, the first gate structure, the liquid crystal layer, and the second polarizer. The third light-emitting area overlaps with the second gate structure and the second polarizer.

2. The display device as claimed in claim 1, wherein the penetration axis of the first grid structure is parallel to the penetration axis of the first polarizer, and the penetration axis of the second grid structure is parallel to the penetration axis of the second polarizer.

3. The display device as claimed in claim 1, wherein the area of ​​the first polarizer is smaller than the area of ​​the second polarizer.

4. The display device of claim 1, wherein the first substrate includes a pixel array and a driving circuit, wherein the first light-emitting area and the second light-emitting area overlap the pixel array, and the third light-emitting area overlaps the driving circuit.

5. The display device of claim 1, wherein the backlight module includes a fourth light-emitting area, and the first substrate includes a fan-out line, wherein the fourth light-emitting area overlaps the second gate structure, the fan-out line, and the second polarizer.

6. The display device of claim 1, wherein the backlight module includes a plurality of light-emitting diodes, wherein the distribution density of the plurality of light-emitting diodes in the second light-emitting area and the third light-emitting area is less than the distribution density of pixels in the liquid crystal panel.

7. The display device as claimed in claim 1, further comprising: A cover plate includes a first penetrating region, a second penetrating region, and a third penetrating region with different transmittances, wherein the first penetrating region, the second penetrating region, and the third penetrating region overlap the first light-emitting region, the second light-emitting region, and the third light-emitting region, respectively, wherein the transmittance of the second penetrating region is greater than the transmittance of the first penetrating region, and the transmittance of the first penetrating region is greater than the transmittance of the third penetrating region.

8. The display device of claim 7, wherein the transmittance of the cover plate is gradually increased.

9. The display device as claimed in claim 1, further comprising: A cover plate includes a first penetrating region, a second penetrating region, and a third penetrating region with different transmittances, wherein the first penetrating region, the second penetrating region, and the third penetrating region overlap the first light-emitting region, the second light-emitting region, and the third light-emitting region, respectively, wherein the transmittance of the third penetrating region is greater than the transmittance of the second penetrating region, and the transmittance of the second penetrating region is greater than the transmittance of the first penetrating region.

Images