Display Panel

Abstract

The present invention discloses a display panel, comprising a first substrate, a second substrate and a display medium layer. The first substrate comprises a bottom plate, a gate, an active layer, a source electrode, a drain electrode and a shielding structure. The gate is arranged on the bottom plate, the active layer and the gate are electrically insulated and arranged correspondingly, the source electrode and the drain electrode are electrically connected to the active layer, and the shielding structure is located on the active layer and covers at least part of the active layer. The shielding structure comprises a metal layer and an anti-reflection structure, and the anti-reflection structure directly contacts the metal layer. The display medium layer is arranged between the first substrate and the second substrate.

Description

[0001] This application is a divisional application of the Chinese invention patent application (application number: 201510067247.X, application date: February 9, 2015, invention name: display panel). Technical Field

[0002] The present invention relates to a display panel, and in particular to a display panel with a high aperture ratio. Background Art

[0003] With the rapid development of display technology, high-resolution displays (i.e., higher pixels required for the same size) have gradually become the mainstream in the market, regardless of the size of the panel. They can process digital signals and display more picture details.

[0004] However, when the resolution is higher, the aperture ratio of the pixel is often sacrificed. Here, the aperture ratio refers to the ratio between the light penetration area and the overall area of ​​each pixel after removing the wiring part and the transistor part of each pixel. The higher the aperture ratio, the larger the area of ​​the part through which the light passes, and the higher the efficiency of light penetration. In the prior art, when the thin film transistor (TFT) substrate / color filter (CF) substrate is assembled, although it can be aligned according to the alignment mark, many components on the substrate will change in size, rotate, deform, etc. during the assembly process. As a result, the assembly accuracy of these components is often uncontrollable, which in turn affects the aperture ratio of the product.

[0005] Therefore, how to maintain the alignment accuracy of the display panel while taking into account a high aperture ratio to achieve the purpose of saving power and energy for the display is indeed an active research target in the art. Summary of the invention

[0006] The object of the present invention is to provide a display panel, which can reduce the area of ​​the light shielding matrix and effectively improve the aperture ratio of the display panel by disposing a metal layer and an anti-reflection structure on a substrate.

[0007] According to the present invention, a display panel is provided, comprising a first substrate, a second substrate and a display medium layer. The first substrate comprises a bottom plate, a gate, an active layer, a source electrode, a drain electrode and a shielding structure. The gate electrode is arranged on the bottom plate, the active layer and the gate electrode are electrically insulated and arranged correspondingly, the source electrode and the drain electrode are electrically connected to the active layer, and the shielding structure is located on the active layer and covers at least part of the active layer. The shielding structure comprises a metal layer and an anti-reflection structure, and the anti-reflection structure directly contacts the metal layer. The display medium layer is arranged between the first substrate and the second substrate.

[0008] In order to better understand the above and other aspects of the present invention, the following embodiments are specifically cited and described in detail with reference to the accompanying drawings: BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1A is a partial cross-sectional view of a display panel according to a first embodiment of the present invention;

[0010] Figure 1B is a partial top view of a display panel according to a first embodiment of the present invention;

[0011] Figure 2A to Figure 2C Schematic diagrams of different embodiments of the shielding layer of the present invention;

[0012] Figure 3A is a partial cross-sectional view of a display panel according to a second embodiment of the present invention;

[0013] Figure 3B is a partial top view of a display panel according to a second embodiment of the present invention;

[0014] Figure 4 is a partial cross-sectional view of a display panel according to a third embodiment of the present invention;

[0015] Figure 5A is a partial cross-sectional view of a display panel according to a fourth embodiment of the present invention;

[0016] Figure 5B is a partial top view of a display panel according to a fourth embodiment of the present invention;

[0017] Figure 6 is a partial cross-sectional view of a display panel according to a fifth embodiment of the present invention;

[0018] Figure 7A to Figure 7C A schematic diagram showing the measurement results of the reflectivity of light of different wavelengths with aluminum-copper nitride (Al-Cu-N) of fixed thickness / indium zinc oxide (IZO) of different thicknesses;

[0019] Figure 8 Schematic diagram of the measurement results of reflectivity of aluminum (Al) and aluminum-neodymium (Al-Nd) alloy for light of different wavelengths.

[0020] Explanation of symbols

[0021] 1, 2, 3, 4, 5: Display panel

[0022] 101, 102, 103: first substrate

[0023] 10: Bottom plate

[0024] 21: Gate

[0025] 21G: Gate line

[0026] 22: Source

[0027] 22D: Data line

[0028] 23: Drain

[0029] 27: Through hole

[0030] 30: Active layer

[0031] 40: Gate insulation layer

[0032] 50: Sheltering structure

[0033] 500: Metal layer

[0034] 501: Anti-reflective structure

[0035] 502: Sidewall

[0036] 51: First anti-reflection layer

[0037] 52: Second anti-reflection layer

[0038] 502: Sloped edge

[0039] 61: First protective layer

[0040] 62: Second protection layer

[0041] 63: Flat layer

[0042] 71: First electrode

[0043] 72: Second electrode

[0044] 200, 201: Second substrate

[0045] 80: Bottom plate

[0046] 81: Color filter

[0047] 82, 82': Shading matrix

[0048] 82-1: First light shielding part

[0049] 82-2: Second light shielding part

[0050] 82-2(T): Strip

[0051] 82-2(P): Protrusion

[0052] 86: Flat layer

[0053] 300: Display medium layer

[0054] 90: Spacer

[0055] L1, L2, L3: light

[0056] R1, R2, R3: reflected light

[0057] M1, M2: Medium

[0058] A-A', B-B', C-C': Section plane

[0059] X, Y, Z: Coordinate axes DETAILED DESCRIPTION

[0060] The following is a detailed description of the embodiments of the present invention with reference to the attached drawings. The same reference numerals in the drawings are used to indicate the same or similar parts. It should be noted that the drawings have been simplified to facilitate the clear description of the contents of the embodiments, and the dimensional ratios in the drawings are not drawn in proportion to the actual products, and therefore are not intended to limit the scope of protection of the present invention.

[0061] The display panel of the embodiment of the present invention may include a first substrate, a second substrate and a display medium layer. The second substrate is disposed opposite to the first substrate, and the display medium layer is disposed between the first substrate and the second substrate. For example, the first substrate may be a thin film transistor substrate, the second substrate may be a color filter substrate, and the display medium layer may be a liquid crystal layer, but the present invention is not limited thereto.

[0062] In an embodiment of the present invention, the first substrate may include a bottom plate, a gate, an active layer, a source electrode, a drain electrode, and a shielding structure. The gate is disposed on the bottom plate, the active layer and the gate are electrically insulated and disposed correspondingly, the source electrode and the drain electrode are electrically connected to the active layer, and the shielding structure is located on the active layer and covers at least a portion of the active layer. The shielding structure includes a metal layer and an anti-reflection structure, and the anti-reflection structure directly contacts the metal layer.

[0063] The following describes in detail different implementations of the display panel of the present invention using the first to fifth embodiments.

[0064] First embodiment

[0065] Figure 1A A partial cross-sectional view of a display panel 1 according to a first embodiment of the present invention is shown. Figure 1B A partial top view of a display panel 1 according to a first embodiment of the present invention is shown. Figure 1A For along Figure 1B The cross-sectional diagram of the display panel 1 is shown along the AA′ section line.

[0066] like Figure 1A , Figure 1BAs shown, the display panel 1 may include a first substrate 101, a second substrate 200 and a display medium layer 300. The second substrate 200 is disposed opposite to the first substrate 101, and the display medium layer 300 is disposed between the first substrate 101 and the second substrate 200. The display medium in the display medium layer 300 may be, for example, a liquid crystal or an organic light-emitting layer. In addition, the display panel 1 may also include a spacer 90 disposed between the first substrate 101 and the second substrate 200.

[0067] The first substrate 101 of the first embodiment of the present invention includes a base plate 10, a gate 21, an active layer 30, a source 22 and a drain 23, a gate insulating layer 40 and a shielding structure 50. The gate 21, the active layer 30, the source 22, the drain 23 and the gate insulating layer 40 constitute a transistor. The gate 21 is disposed on the base plate 10, the active layer 30 and the gate 21 are disposed correspondingly, and the source 22 and the drain 23 are electrically connected to the active layer 30. The active layer 30 and the gate 21 can be electrically insulated and disposed oppositely. For example, in this embodiment, the gate insulating layer 40 is disposed between the gate 21 and the active layer 30.

[0068] In this embodiment, the base plate 10 may be, for example, a glass substrate or a flexible substrate (such as plastic). The active layer 30 may be an amorphous silicon (a-Si) layer, a polysilicon layer or a metal oxide layer. The metal oxide layer suitable for the active layer may be, for example, an indium gallium zinc oxide (IGZO) layer. In addition, the shielding structure 50 is a two-layer or multi-layer structure.

[0069] Figure 2A to Figure 2C Different embodiments of the shielding structure 50 of the present invention are shown. The shielding structure 50 may include a metal layer 500 and an anti-reflection structure 501. The anti-reflection structure 501 may be disposed above the metal layer 500 and directly contact the metal layer 500. The reflected light generated by the anti-reflection structure 501 and the reflected light generated by the metal layer 500 will destructively interfere with each other, thereby reducing the overall reflectivity of the shielding layer 50.

[0070] For example, if Figure 2AAs shown, when the light L1 enters the medium M2 from the medium M1, it will be refracted into the light L2, and at the same time, the reflected light R1 will be generated at the interface between the medium M1 and M2. When the light L2 enters the anti-reflection structure 501 from the medium M2, it will be refracted into the light L3, and at the same time, the reflected light R2 will be generated at the interface between the medium M2 and the anti-reflection structure 501. The light L3 will be reflected by the metal layer 500 to generate the reflected light R3. Here, the medium M1 is, for example, air, and the medium M2 is, for example, glass. The refractive index of the anti-reflection structure 501 is different from the refractive index of the metal layer 500, so that the reflected light R2 generated at the interface of the anti-reflection structure 501 and the reflected light R3 generated at the interface of the metal layer 500 have an optical path difference, resulting in non-constructive interference (or destructive interference). The refractive index of the anti-reflection structure 501 can be greater than or less than the refractive index of the metal layer 500.

[0071] In the embodiment of the present invention, the material of the metal layer 500 can be selected from the group consisting of aluminum (Al), molybdenum (Mo), chromium (Cr), nickel (Ni), copper (Cu), iron (Fe), neodymium (Nd), alloys thereof, and mixtures thereof. That is, the metal layer 500 can be the aforementioned metals, alloys of the aforementioned metals, or mixtures of the aforementioned metals and the aforementioned alloys. For example, when the metal layer 500 is an alloy, it can be, for example, an aluminum alloy, a nickel alloy, or a copper alloy.

[0072] The material of the anti-reflection structure 501 may be selected from the group consisting of a metal oxide, a metal nitride, a metal alloy oxide, a metal alloy nitride, and mixtures thereof. For example, the anti-reflection structure may include indium tin oxide (ITO) or indium zinc oxide (IZO).

[0073] Furthermore, the metal included in the material of the anti-reflection structure 501 may be the same metal as the metal included in the metal layer 500. For example, the anti-reflection structure 501 may be an oxide or nitride of the material of the metal layer 500, and the anti-reflection structure may be formed by oxidizing or nitriding the metal layer 500. Specifically, when the metal layer 500 is aluminum, the anti-reflection structure 501 may be an oxide or nitride of aluminum. For another example, when the metal layer 500 is an alloy, the anti-reflection structure 501 may be an oxide of the alloy, or a nitride of the alloy. Specifically, when the metal layer 500 is an aluminum-nickel alloy, the anti-reflection structure 501 may be an oxide or nitride of the aluminum-nickel alloy. When the metal layer 500 is an aluminum-copper alloy, the anti-reflection structure 501 may be an oxide or nitride of the aluminum-copper alloy.

[0074] like Figure 2BAs shown, the anti-reflection structure 501 is disposed above the metal layer 500, and the anti-reflection structure 501 can completely cover the metal layer 500 and the sidewall 502 of the metal layer 500. Such a structure can effectively avoid the problem of too high reflectivity of the tapered sidewall 502 of the metal layer 500.

[0075] In addition, the anti-reflection structure 501 may also be a two-layer or multi-layer structure. Figure 2C As shown, the anti-reflection structure 501 may include a first anti-reflection layer 51 and a second anti-reflection layer 52, and the first anti-reflection layer 51 and the second anti-reflection layer 52 are respectively disposed on both sides of the metal layer 500. In this embodiment, the first anti-reflection layer 51 is located on the upper side of the metal layer 500 to reduce the reflection of natural light from the outside of the display panel 1, and the second anti-reflection layer 52 is located on the lower side of the metal layer 500 to reduce the reflection of the light source from the backlight module (not shown). Here, the upper side may represent the light emitting side close to the second substrate 200, and the lower side may represent the other side away from the light emitting side.

[0076] However, the present invention does not limit the number of layers of the anti-reflection structure 501, that is, the anti-reflection structure 501 may include more anti-reflection layers. The anti-reflection structure 501 may be located on the upper side or the lower side of the metal layer 500, or may be located on both the upper side and the lower side of the metal. Moreover, the number of layers of the anti-reflection structure 501 is not limited. When the anti-reflection structure 501 includes multiple anti-reflection layers, taking the multiple anti-reflection layers located on the upper side of the metal layer 500 as an example, the refractive index n value of each layer in the multiple anti-reflection layers is not necessarily limited. For example, the n value may gradually increase or decrease toward the light emitting side. Alternatively, the n value may also be large / small / large / small...alternatingly arranged.

[0077] In the first embodiment of the present invention, the first substrate 101 may further include a first protective layer 61, a first electrode 71 and a second electrode 72. The first protective layer 61 is located between the active layer 30 and the shielding structure 50, the first electrode 71 contacts the drain 23, and the second electrode 72 is disposed on the first protective layer 61. In addition, the shielding structure 50 may have the following structure: Figure 2C The structure shown, that is, the anti-reflection structure 501 (the second anti-reflection layer 52 ) of the shielding structure 50 can directly contact the first protection layer 61 . The metal layer 500 and the anti-reflection structure 501 can effectively shield the active layer 30 .

[0078] The first electrode 71 and the second electrode 72 may be transparent conductive layers, such as indium tin oxide or indium zinc oxide. In this embodiment, the first electrode 71 may be, for example, a pixel electrode layer, and the second electrode 72 may be, for example, a common electrode layer. Figure 1B As shown, the second electrode 72 may be in a grid shape, for example.

[0079] also, Figure 1B A gate line 21G and a data line 22D are shown. Figure 1A The gate 21 is connected to Figure 1B The gate line 21G, Figure 1A The source 22 is connected to Figure 1B Data line 22D.

[0080] The second substrate 200 of the embodiment of the present invention may be, for example, a color filter substrate, including a bottom plate 80, a color filter 81, a light shielding matrix 82 and a flat layer 86. The flat layer 86 may be an organic transparent flat layer. The light shielding matrix 82 includes a plurality of first light shielding portions 82-1 and a plurality of first opening portions 83. The plurality of first light shielding portions 82-1 are arranged at intervals and extend along a first direction (Y direction), and the first opening portions 83 are exposed by the first light shielding portions 82-1. For example, Figure 1B Two first light shielding portions 82 - 1 of the second substrate 200 are shown, and the first opening 83 is located between the two first light shielding portions 82 - 1 .

[0081] Since the shielding structure 50 (including the metal layer 500 and the anti-reflection structure 501) has shielded the active layer 30, the shading matrix 82 can only be used to prevent light mixing between adjacent pixels. Therefore, the vertical projection of the active layer 30 on the second substrate 200 is at least partially located in the first opening 83, that is, when the positional relationship between the active layer 30 and the shading matrix 82 is observed in a plan view, the first opening 83 of the shading matrix 82 can expose at least part of the active layer 30. That is, the shading matrix 82 of this embodiment does not need to shield the active layer 30 in a second direction (the X direction in the figure). Alternatively, the shading matrix 82 can shield part of the active layer in the second direction without shielding the entire active layer (the second direction is different from the first direction, the X direction in the figure, and in this embodiment, the second direction is perpendicular to the first direction). Therefore, this structure can effectively reduce the area of ​​the shading matrix 82 and increase the aperture ratio of the display panel 1.

[0082] Second embodiment

[0083] Figure 3A A partial cross-sectional view of a display panel 2 according to a second embodiment of the present invention is shown. Figure 3B A partial top view of a display panel 2 according to a second embodiment of the present invention is shown. Figure 3A For along Figure 3B BB' section line is a schematic cross-sectional view of the display panel 2. It should be noted that in order to more clearly illustrate the structure of the display panel 2, Figure 3B The partial top view omits some components, such as the data line 22D, the gate line 21G and other structures.

[0084] Similar to the first embodiment, the display panel 2 may include a first substrate 102, a second substrate 200, and a display medium layer 300. The second substrate 200 is disposed opposite to the first substrate 102, and the display medium layer 300 is disposed between the first substrate 102 and the second substrate 200. In addition, the display panel 2 may also include a spacer 90 disposed between the first substrate 102 and the second substrate 200. The difference from the display panel 1 of the first embodiment lies in the structure of the first substrate 102 of the second embodiment.

[0085] The first substrate 102 of the second embodiment of the present invention includes a base plate 10, a gate 21, an active layer 30, a source 22 and a drain 23, a gate insulating layer 40 and a shielding structure 50. The gate 21 is disposed on the base plate 10, the active layer 30 and the gate 21 are electrically insulated and disposed opposite to each other, the source 22 and the drain 23 are electrically connected to the active layer 30, and the gate insulating layer 40 is disposed between the gate 21 and the active layer 30.

[0086] The first substrate 102 may further include a first protective layer 61, a first electrode 71 and a second electrode 72. The first protective layer 61 is located between the active layer 30 and the shielding structure 50, and the first conductive layer 71 contacts the drain electrode 23. In addition, the shielding structure 50 may have a Figure 2C The structure shown, that is, the anti-reflection structure 501 (the second anti-reflection layer 52 ) of the shielding structure 50 can directly contact the first protection layer 61 . The metal layer 500 and the anti-reflection structure 501 can effectively shield the active layer 30 .

[0087] like Figure 3A As shown, the first substrate 102 further includes a second protective layer 62 and a planar layer 63. The planar layer 63 is located on the first protective layer 61. In this embodiment, the planar layer 63 may be, for example, disposed between the first protective layer 61 and the second electrode 72, and the planar layer 63 may, for example, include an organic material, which can effectively insulate the second electrode 72 from other elements (e.g., the active layer 30) in the first substrate 102. The second protective layer 62 is disposed on the planar layer 63, and a portion of the second protective layer 62 is between the first electrode 71 and the second electrode 72.

[0088] like Figure 3A As shown, the first substrate 102 may include a through hole (via) 27, and the through hole 27 penetrates the planar layer 63 and the first protective layer 61 to expose a surface of the drain 23. At least a portion of the first electrode 71 is located in the through hole 27, so that the first electrode 71 can be electrically connected to the surface of the drain 23. In other words, the first electrode 71 can be disposed on the surface of the second protective layer 62, the drain 23 and the planar layer 63 along the through hole 27, and directly contact the drain 23.

[0089] The first electrode 71 and the second electrode 72 may be transparent conductive layers, such as indium tin oxide or indium zinc oxide. In this embodiment, the first electrode 71 may be, for example, a pixel electrode layer, and the second electrode 72 may be, for example, a common electrode layer. Figure 3B As shown, the first electrode 71 may be in a grid shape, for example.

[0090] Similarly, the second substrate 200 of the embodiment of the present invention may be, for example, a color filter substrate, including a bottom plate 80, a color filter 81, a light shielding matrix 82 and a flat layer 86. The flat layer 86 may be an organic transparent flat layer. Figure 3B As shown, the shading matrix 82 includes a plurality of first shading portions 82 - 1 and a plurality of first openings 83 . The plurality of first shading portions 82 - 1 are arranged at intervals and extend along a first direction (Y direction), and the first openings 83 are exposed by the first shading portions 82 - 1 .

[0091] In addition, since the shielding structure 50 (including the metal layer 500 and the anti-reflection structure 501) has shielded the active layer 30, the light shielding matrix 82 can only be used to prevent light mixing between adjacent pixels. Therefore, the vertical projection of the active layer 30 on the second substrate 200 is at least partially located in the first opening 83. In other words, when the positional relationship between the active layer 30 and the light shielding matrix 82 is observed in a plan view, the first opening 83 of the light shielding matrix 82 can expose at least part of the active layer 30. That is, the light shielding matrix 82 of this embodiment does not need to shield the active layer 30 in the X direction. Alternatively, the light shielding matrix 82 can shield part of the active layer 30 in the X direction without shielding the entire active layer 30. Therefore, this structure can effectively reduce the area of ​​the light shielding matrix 82 and increase the aperture ratio of the display panel 2.

[0092] Third embodiment

[0093] Figure 4 A partial cross-sectional view of a display panel 3 according to a third embodiment of the present invention is shown. The top view of the display panel 3 according to the third embodiment of the present invention is similar to that of the second embodiment, and thus can be directly referred to. Figure 3B The structure shown.

[0094] Similar to the second embodiment, the display panel 3 may include a first substrate 103, a second substrate 200 and a display medium layer 300. The second substrate 200 is disposed opposite to the first substrate 103, and the display medium layer 300 is disposed between the first substrate 103 and the second substrate 200. In addition, the display panel 3 may also include a spacer 90 disposed between the first substrate 103 and the second substrate 200. The difference from the display panel 2 of the second embodiment lies in the shielding structure 50 of the first substrate 103.

[0095] In this embodiment, the shielding structure 50 may have Figure 2B In the illustrated structure, the anti-reflection structure 501 of the shielding structure 50 is disposed above the metal layer 500 and completely covers the metal layer 500. In addition, the metal layer 500 of the shielding structure 50 directly contacts the second electrode 72.

[0096] Since the second electrode 72 can be a transparent conductive layer, such as indium tin oxide or indium zinc oxide, the second electrode 72 can be used as another anti-reflection structure of the shielding structure 50, that is, the anti-reflection structure of this embodiment can include an electrode (i.e., the second electrode 72), and the reflectivity of the metal layer 500 can be effectively reduced by directly contacting the metal layer 500 with the second conductive layer 72. Here, the anti-reflection structure 501 located above the metal layer 500 can reduce the reflection of natural light from the outside of the display panel 3, and the second electrode 72 can reduce the reflection of the light source from the backlight module (not shown).

[0097] In the embodiment of the present invention, the shielding structure 50 may include a metal layer 500, a first anti-reflection layer 51 located on the upper side of the metal layer 500, and a second anti-reflection layer 52 located on the lower side of the metal layer 500 (see Figure 2C ). The first anti-reflection layer 51 may include a nitride of a metal alloy and a transparent conductive layer, and the second anti-reflection layer 52 may include a transparent conductive layer. For example, the specific shielding structure 50 may be a stack of ITO / AlCu / AlCuN / ITO, wherein ITO is a transparent conductive layer and may be shared with a pixel electrode or a common electrode, for example, may be shared with the second electrode 72.

[0098] Similarly, if Figure 4 As shown, the first substrate 103 may include a through hole 27, and the through hole 27 penetrates the planar layer 63 and the first protective layer 61 to expose a surface of the drain 23. At least a portion of the first electrode 71 is located in the through hole 27, so that the first electrode 71 can be electrically connected to the surface of the drain 23. In other words, the first electrode 71 can be disposed on the surface of the second protective layer 62, the drain 23 and the planar layer 63 along the through hole 27, and directly contact the drain 23.

[0099] The structure of the second substrate 200 of the third embodiment of the present invention is similar to that of the first and second embodiments, and will not be elaborated herein.

[0100] Fourth embodiment

[0101] Figure 5A A partial cross-sectional view of a display panel 4 according to a fourth embodiment of the present invention is shown. Figure 5B A partial top view of a display panel 4 according to a fourth embodiment of the present invention is shown. Figure 5A For along Figure 5BThe cross-sectional view of the display panel 4 is shown along the CC' section line. It should be noted that, in order to more clearly illustrate the structure of the display panel 4, Figure 5B The partial top view omits some components, such as the data line 22D, the gate line 21G and other structures.

[0102] Similar to the second embodiment, the display panel 4 may include a first substrate 102, a second substrate 201 and a display medium layer 300. The second substrate 201 is disposed opposite to the first substrate 102, and the display medium layer 300 is disposed between the first substrate 102 and the second substrate 201. In addition, the display panel 4 may also include a spacer 90 disposed between the first substrate 102 and the second substrate 201. The difference from the display panel 2 of the second embodiment lies in the structure of the second substrate 201 of the fourth embodiment.

[0103] Due to the existence of the through hole 27, part of the liquid crystal may be located in the through hole 27, resulting in abnormal operation of the liquid crystal. Therefore, in this embodiment, the light shielding matrix 82' can be used to shield the through hole 27 to prevent the above phenomenon from affecting the display quality.

[0104] In the present embodiment, the second substrate 201 may be, for example, a color filter substrate, including a bottom plate 80, a color filter 81, a light shielding matrix 82' and a flat layer 86. The flat layer 86 may be an organic transparent flat layer. The light shielding matrix 82' includes a plurality of first light shielding portions 82-1, a plurality of second light shielding portions 82-2 and a plurality of second opening portions 84. The first light shielding portions 82-1 are arranged at intervals and extend along a first direction, and the second light shielding portions 82-2 extend along a second direction, and the first direction and the second direction are different. In the present embodiment, the first direction is, for example, the Y direction, and the second direction is, for example, the X direction, and the second opening portion 84 is exposed by the first light shielding portions 82-1 and the second light shielding portions 82-2.

[0105] For example, Figure 5B Two first light shielding portions 82-1 and two second light shielding portions 82-2 are shown, and the area between the two first light shielding portions 82-1 and the two second light shielding portions 82-2 is the second opening portion 84. In addition, at least one of the second light shielding portions 82-2 may have a strip portion 82-2 (T) and a protruding portion 82-2 (P), and the protruding portion 82-2 (P) protrudes from one side of the strip portion 82-2 (T).

[0106] In this embodiment, the light shielding matrix 82' is disposed on the through hole 27, the protrusion 82-2 (P) can shield the through hole 27, and the vertical projection of the active layer 30 of the first substrate 102 on the second substrate 201 is at least partially located in the second opening 84. In other words, when the positional relationship between the active layer 30 and the light shielding matrix 82' is observed in a plan view, the second opening 84 of the light shielding matrix 82' can expose at least a portion of the active layer 30.

[0107] In addition, the first light shielding portion 82-1 of the light shielding matrix 82' can be used to prevent light mixing between adjacent pixels, and the second light shielding portion 82-2 can be used to shield the through hole 27. Since the shielding structure 50 (including the metal layer 500 and the anti-reflection structure 501) has shielded the active layer 30, the light shielding matrix 82' of this embodiment is only used to prevent light mixing between adjacent pixels and correspondingly shield the through hole 27, and can shield part of the active layer 30 in the X direction without shielding the entire active layer 30. Therefore, the area of ​​the light shielding matrix 82' can be effectively reduced, and the aperture ratio of the display panel 4 can be increased.

[0108] Fifth embodiment

[0109] Figure 6 A partial cross-sectional view of a display panel 5 according to a fifth embodiment of the present invention is shown. The top view of the display panel 5 according to the fifth embodiment of the present invention is similar to that of the fourth embodiment, and thus can be directly referred to. Figure 5B The structure shown.

[0110] In this embodiment, the shielding layer 50 may have Figure 2B In the illustrated structure, that is, the anti-reflection structure 501 of the shielding structure 50 is disposed above the metal layer 500 and completely covers the metal layer. Figure 6 As shown, (the metal layer 500 of) the shielding layer 50 may directly contact the second electrode 72 .

[0111] Since the second electrode 72 can be a transparent conductive layer, such as indium tin oxide or indium zinc oxide, the second electrode 72 can serve as another anti-reflection structure of the metal layer 500, that is, by directly contacting the metal layer 500 with the second electrode 72, the reflectivity of the metal layer 500 can be effectively reduced.

[0112] The fifth embodiment of the present invention may also include a second substrate 201. The second substrate 201 is, for example, a color filter substrate, and may include a bottom plate 80, a color filter 81, a light shielding matrix 82' and a flat layer 86. The flat layer 86 may be an organic transparent flat layer. The light shielding matrix 82' is disposed on the through hole 27, and may include a first light shielding portion 82-1 and a second light shielding portion 82-2. The first light shielding portion 82-1 may be used to prevent light mixing between adjacent pixels, and the protruding portion 82-2 (P) of the second light shielding portion 82-2 may be used to shield the through hole 27. Since the shielding structure 50 (including the metal layer 500 and the anti-reflection structure 501) contacting the second electrode 72 has shielded the active layer 30, the light shielding matrix 82' is only used to prevent light mixing between adjacent pixels and correspondingly shield the through hole 27, and may shield part of the active layer 30 in the X direction, without shielding the entire active layer 30. Therefore, the area of ​​the light shielding matrix 82 ′ can be effectively reduced, and the aperture ratio of the display panel 5 can be increased.

[0113] The shielding structure 50 of the present invention can be used to shield the active layer 30 in the transistor. Therefore, the shading matrix 82, 82' on the opposite substrate does not need to be used to shield the active layer 30, or only needs to shield part of the active layer 30. Therefore, the area of ​​the shading matrix 82, 82' can be reduced, thereby increasing the aperture ratio of the display panel. Although the above embodiment takes the fringe field switching liquid crystal display (FFS LCD) as an example, the present invention is not limited to this. The present invention is applicable to all types of display panels with transistors, such as LCD panels and OLED panels. In addition to the fringe field switching liquid crystal display, the applicable LCD panels also include twisted nematic (TN) LCD, in-plane switching (IPS) LCD, vertical alignment (VA) LCD, etc., but are not limited to this.

[0114] Furthermore, the display panel of each embodiment of the present invention shields the active layer 30 with a metal layer 500 and an anti-reflection structure 501. This is because the metal itself has a high reflectivity and may not be able to effectively shield. Therefore, the anti-reflection structure 501 is used to reduce the reflection of light, so that the metal layer 500 and the anti-reflection structure 501 can achieve a good shielding effect. The following uses aluminum-copper nitride / indium zinc oxide (IZO) as an embodiment of the anti-reflection structure 501 to measure its reflectivity for light of different wavelengths.

[0115] Figure 7A to Figure 7C The illustrated light shielding structure is aluminum-neodymium alloy / aluminum-copper nitride / indium zinc oxide (AlNd / AlCuN / IZO), and the measured results of reflectivity for light of different wavelengths. Fig. 7A The thickness of the aluminum-copper nitride is The thickness of indium zinc oxide is The reflectivity of light of different wavelengths is measured with a polarizer. Figure 7B The thickness of the aluminum-copper nitride is The thickness of indium zinc oxide is The reflectivity of light of different wavelengths is measured with polarizing film. Figure 7C The thickness of the aluminum-copper nitride is The thickness of indium zinc oxide is The reflectivity of light of different wavelengths is measured with polarizing film.

[0116] Figure 8 Plotted with thickness The measurement results of the reflectivity of aluminum (Al) and aluminum-neodymium (Al-Nd) alloy for light of different wavelengths.

[0117] Compare Figure 7A to Figure 7C and Figure 8 The results clearly show that no matter what thickness combination is used, the reflectivity of the aluminum-neodymium alloy / aluminum-copper nitride / indium zinc oxide for light of different wavelengths is significantly lower than the reflectivity of aluminum or aluminum-neodymium alloy for light of different wavelengths. In other words, by using aluminum-copper nitride / indium zinc oxide as the anti-reflection structure 501, the reflection of light can be effectively reduced, so that the metal layer 500 and the anti-reflection structure 501 can achieve a good shielding effect.

[0118] Based on the above embodiments, the display panel of the present invention can reduce the area of ​​the light shielding matrix by disposing a metal layer and an anti-reflection structure on the substrate, thereby effectively improving the aperture ratio of the display panel and achieving the purpose of saving power and energy of the display.

[0119] Although the present invention is disclosed in conjunction with the above embodiments, it is not intended to limit the present invention. A person skilled in the art of the present invention may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the definition of the attached claims.

Claims

1. A display panel, characterized in that: include: The first substrate comprises: A first bottom plate having a first surface; A gate is disposed on the first surface of the first base plate; An active layer, electrically insulated from and corresponding to the gate; a drain electrode electrically connected to the active layer; A shielding structure is disposed on the first surface of the first base plate and covers at least a portion of the active layer; and A pixel electrode electrically connected to the drain electrode via a through hole; The second substrate comprises: A second bottom plate having a second surface, arranged opposite to the first surface of the first bottom plate; a light shielding matrix disposed on the second surface of the second base plate, the light shielding matrix comprising a plurality of light shielding portions and a plurality of opening portions, wherein in a top view, at least one of the light shielding portions of the light shielding matrix in the second substrate shields the through hole in the first substrate; and a color filter, a portion of which is disposed in at least one of the openings of the light-shielding matrix; and The display medium layer is arranged between the first substrate and the light shielding matrix of the second substrate. 2 . The display panel as claimed in claim 1 , wherein a material of the shielding structure comprises metal.

3. The display panel as claimed in claim 2, wherein the metal is selected from the group consisting of aluminum, molybdenum, chromium, nickel, copper, iron, neodymium, alloys thereof, and mixtures thereof.

4. The display panel according to claim 1, wherein The first substrate comprises another active layer and another shielding structure, The another shielding structure covers at least a portion of the another active layer. 5 . The display panel as claimed in claim 4 , wherein the shielding structure is a multi-layer structure, the shielding structure comprises a middle layer, an upper layer and a lower layer, and a refractive index of the upper layer is different from a refractive index of the middle layer.

6. The display panel as claimed in claim 1, wherein the first substrate further comprises: A first insulating layer is disposed on the drain electrode; wherein the shielding structure is located on the first insulating layer, and wherein the pixel electrode is disposed on the shielding structure; A common electrode is disposed on the shielding structure; as well as The second insulating layer is arranged between the common electrode and the pixel electrode. 7 . The display panel as claimed in claim 6 , wherein the shielding structure comprises a middle layer, an upper layer and a lower layer, and a refractive index of the upper layer is different from a refractive index of the middle layer. 8 . The display panel as claimed in claim 6 , wherein the material of the shielding structure comprises metal, and the metal is selected from the group consisting of aluminum, molybdenum, chromium, nickel, copper, iron, neodymium, alloys thereof, and mixtures thereof. 9 . The display panel as claimed in claim 6 , wherein a vertical projection of the active layer on the second substrate is at least partially located in at least one of the openings.

10. The display panel according to claim 6, wherein The first substrate comprises another active layer and another shielding structure, The another shielding structure covers at least a portion of the another active layer.

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