Color filter substrate and display panel

Abstract

This invention provides a color filter substrate and a display panel, the display panel including a pixel array substrate and a first viewing angle limiting structure layer. The pixel array substrate includes a first substrate and a pixel driving layer disposed on the first substrate. The first viewing angle limiting structure layer is disposed between the first substrate and the pixel driving layer. The first viewing angle limiting structure layer includes a plurality of first barrier structures separated from each other. These first barrier structures are arranged along a first direction and extend in a second direction. The first direction intersects with the second direction.

Description

Technical Field

[0001] This invention relates to a display substrate and a display panel, and more particularly to a color filter substrate and a display panel with a viewing angle limiting function. Background Technology

[0002] Generally, display devices are designed with wide viewing angles to allow multiple users to view the displayed images together. However, in certain usage scenarios, such as browsing private websites, displaying confidential information, or entering passwords in public places, the wide viewing angle can make it easy for others to see private information. To achieve privacy, a common practice is to attach a privacy module to the front of the display panel to control the amount of light emitted at wide angles. However, this approach increases the overall thickness of the display device, limiting its application. Summary of the Invention

[0003] This invention relates to a color filter substrate with a viewing angle limiting structure layer, which makes the overall thickness of the display panel formed by it relatively thin.

[0004] This invention relates to a display panel with a viewing angle limiting function, which is relatively thin overall.

[0005] According to an embodiment of the present invention, a display panel includes a pixel array substrate and a first viewing angle limiting structure layer. The pixel array substrate includes a first substrate and a pixel driving layer disposed on the first substrate. The first viewing angle limiting structure layer is disposed between the first substrate and the pixel driving layer. The first viewing angle limiting structure layer includes a plurality of first barrier structures separated from each other. These first barrier structures are arranged along a first direction and extend in a second direction. The first direction intersects the second direction.

[0006] In a display panel according to an embodiment of the present invention, the display panel further includes a color filter substrate, a display medium layer, and a second viewing angle limiting structure layer. The color filter substrate is disposed opposite to a pixel array substrate and includes a second substrate and a color filter layer disposed on the second substrate. The display medium layer is disposed between the pixel array substrate and the color filter substrate. The second viewing angle limiting structure layer is disposed on the color filter substrate and includes a plurality of second barrier structures separated from each other. These second barrier structures are arranged along a third direction and extend in a fourth direction. The third direction intersects with the fourth direction.

[0007] In a display panel according to an embodiment of the present invention, a second viewing angle limiting structure layer is located between a second substrate and a color filter layer.

[0008] In the display panel according to an embodiment of the present invention, a third direction is perpendicular to the first direction. The third direction is parallel to the second direction and the fourth direction is parallel to the first direction.

[0009] In a display panel according to an embodiment of the present invention, a color filter layer is located between a second substrate and a second viewing angle limiting structure layer.

[0010] In a display panel according to an embodiment of the present invention, a second viewing angle limiting structure layer is disposed on the side surface of the second substrate opposite to the color filter layer and the display medium layer.

[0011] According to an embodiment of the present invention, a color filter substrate includes a substrate, a color filter layer, and a first viewing angle limiting structure layer. The color filter layer is disposed on the substrate. The first viewing angle limiting structure layer is disposed on the side of the substrate where the color filter layer is disposed. The first viewing angle limiting structure layer includes a plurality of first barrier structures separated from each other. The plurality of first barrier structures are arranged along a first direction and extend in a second direction. The first direction intersects the second direction.

[0012] In a color filter substrate according to an embodiment of the present invention, a first viewing angle limiting structure layer is located between the substrate and the color filter layer.

[0013] In a color filter substrate according to an embodiment of the present invention, the color filter layer includes a plurality of color filter patterns. A plurality of first barrier structures are respectively disposed between the plurality of color filter patterns.

[0014] In the color filter substrate according to an embodiment of the present invention, the color filter layer is located between the viewing angle limiting structure and the substrate.

[0015] In a color filter substrate according to an embodiment of the present invention, the color filter substrate further includes a second viewing angle limiting structure layer disposed on a side of the substrate opposite to the color filter layer. The second viewing angle limiting structure layer includes a plurality of second barrier structures separated from each other. These second barrier structures are arranged along a third direction and extend in a fourth direction. The third direction intersects the fourth direction with the first direction.

[0016] Based on the above, in a display panel according to an embodiment of the present invention, a viewing angle limiting structure layer is provided on a pixel array substrate or a color filter substrate. The viewing angle limiting structure layer has multiple barrier structures that are separated from each other, and the arrangement direction and extension direction of these barrier structures can define the viewing angle limiting direction of the display panel and enable the display panel to have a viewing angle limiting function. By providing the viewing angle limiting structure layer on the side of the pixel array substrate where the pixel driving layer is located, or on the side of the color filter substrate where the color filter layer is located, the overall thickness of the privacy screen display panel can be effectively reduced. Attached Figure Description

[0017] Figure 1 This is a cross-sectional schematic diagram of a display panel according to a first embodiment of the present invention;

[0018] Figure 2This is a cross-sectional schematic diagram of a display panel according to a second embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional schematic diagram of a display panel according to a third embodiment of the present invention;

[0020] Figure 4 This is a cross-sectional schematic diagram of a display panel according to the fourth embodiment of the present invention;

[0021] Figure 5 This is a cross-sectional schematic diagram of a display panel according to the fifth embodiment of the present invention;

[0022] Figure 6 yes Figure 5 A schematic diagram of the first-view limiting structure layer and the second-view limiting structure layer;

[0023] Figure 7 This is a cross-sectional schematic diagram of a display panel according to the sixth embodiment of the present invention;

[0024] Figure 8 This is a cross-sectional schematic diagram of a display panel according to the seventh embodiment of the present invention;

[0025] Figure 9 This is a cross-sectional schematic diagram of a display panel according to the eighth embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures

[0027] 11, 12, 13, 14, 21, 22, 23, 24: Display panel;

[0028] 100, 100A: Pixel array substrate;

[0029] 110: First substrate;

[0030] 120: Pixel driving layer;

[0031] 121, 123: Insulation layer;

[0032] 131, 131A, 131B, 131C, 131D: First-person perspective restricted structural layers;

[0033] 132, 132”: Second-view confined structural layer;

[0034] 135a, 135a', 135a”: First retaining wall structure;

[0035] 135b, 135b”: Second retaining wall structure;

[0036] 138: Protective layer;

[0037] 200, 200A, 200B, 200C, 200D, 200D”, 200E, 200F: Color filter substrates;

[0038] 205, 205A: Light-blocking pattern layer;

[0039] 210: Second substrate;

[0040] 210s: Surface;

[0041] 220, 220A: Color filter layer;

[0042] 221, 222, 223, 221A, 222A, 223A: Colored filter patterns;

[0043] 230: Covering layer;

[0044] 250: Spacer;

[0045] 300: Display media layer;

[0046] CP: Conductive pattern;

[0047] DE: Drain electrode;

[0048] GE: Gate;

[0049] OP: Opening;

[0050] PE: Pixel electrode;

[0051] SC: Semiconductor pattern;

[0052] SE: Source pole;

[0053] T: Active component;

[0054] X, Y, Z: Direction. Detailed Implementation

[0055] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element references are used in the drawings and description to denote the same or similar parts.

[0056] Figure 1 This is a cross-sectional schematic diagram of a display panel according to a first embodiment of the present invention. Please refer to... Figure 1The display panel 11 includes a pixel array substrate 100, a color filter substrate 200, and a display medium layer 300. The display medium layer 300 is disposed between the pixel array substrate 100 and the color filter substrate 200. The pixel array substrate 100 includes a first substrate 110 and a pixel driving layer 120 disposed on the first substrate 110. The color filter substrate 200 is disposed opposite to the pixel array substrate 100 and includes a second substrate 210 and a color filter layer 220 disposed on the second substrate 210. In this embodiment, the display medium layer 300 is, for example, a liquid crystal layer, but is not limited thereto. In other embodiments, the display medium layer may also be a plurality of organic light-emitting diodes.

[0057] For example, the pixel driving layer 120 has multiple scan lines (not shown), multiple data lines (not shown), and multiple pixel structures, and the pixel structure may include an active element T and a pixel electrode PE. The active element T is electrically connected to one scan line, one data line, and the pixel electrode PE. In this embodiment, the active element T includes a gate GE, a source SE, a drain DE, and a semiconductor pattern SC. An insulating layer 121 is provided between the gate GE and the semiconductor pattern SC. The source SE and the drain DE respectively contact two different regions of the semiconductor pattern SC, wherein the drain DE is electrically connected to a conductive pattern CP disposed on the insulating layer 121. Another insulating layer 123 covers the source SE, the drain DE, and the semiconductor pattern SC. The pixel electrode PE is disposed on the insulating layer 123 and is electrically connected to the conductive pattern CP via a contact hole (not shown) in the insulating layer 123. That is, the pixel electrode PE is electrically connected to the drain DE of the active element T, but this is not a limitation.

[0058] On the other hand, in this embodiment, the color filter layer 220 may include multiple color filter patterns, such as multiple first color filter patterns 221, multiple second color filter patterns 222, and multiple third color filter patterns 223. The first color filter patterns 221, second color filter patterns 222, and third color filter patterns 223 may be arranged alternately along the Y direction and are used to filter out red light, green light, and blue light, respectively, but are not limited thereto.

[0059] In addition, a light-shielding pattern layer 205 is provided on the color filter substrate 200. The light-shielding pattern layer 205 has multiple openings OP, and the aforementioned multiple color filter patterns are respectively disposed in these openings OP. In particular, these openings OP can define multiple pixel areas of the display panel 11, and the multiple pixel electrodes PE of the aforementioned multiple pixel structures are respectively disposed corresponding to these pixel areas.

[0060] To create accommodating space that can fill the display medium layer 300, a plurality of spacers 250 may be provided between the pixel array substrate 100 and the color filter substrate 200. In this embodiment, these spacers 250 may optionally be disposed on the color filter substrate 200 and overlap the light-shielding pattern layer 205 along the Z direction. A cladding layer 230 is provided between the spacers 250 and the color filter layer 220, but this is not a limitation.

[0061] Furthermore, the display panel 11 also includes a first viewing angle limiting structure layer 131 disposed between the first substrate 110 and the pixel driving layer 120. The first viewing angle limiting structure layer 131 has a plurality of first barrier structures 135a separated from each other and a protective layer 138 filling the spaces between these first barrier structures 135a. For example, these first barrier structures 135a may be arranged along the Y direction and extend in the X direction, wherein the X direction intersects (e.g., perpendicular to) the Y direction. Therefore, through the above-described arrangement of the plurality of first barrier structures 135a, the display panel 11 can have a viewing angle limiting capability parallel to or opposite to the Y direction, thereby achieving a one-dimensional privacy protection effect.

[0062] Since the process of the first-view limiting structure layer 131 can be integrated into the process of the pixel array substrate 100, no additional substrate is needed for manufacturing and attachment, which helps to significantly reduce the overall thickness of the display panel 11.

[0063] Other embodiments will be listed below to illustrate this disclosure in detail, wherein the same components will be marked with the same symbols, and the description of the same technical content will be omitted. For the omitted parts, please refer to the foregoing embodiments, and they will not be repeated below.

[0064] Figure 2 This is a cross-sectional schematic diagram of a display panel according to a second embodiment of the present invention. Figure 3 This is a cross-sectional schematic diagram of a display panel according to a third embodiment of the present invention. Please refer to... Figure 2 The display panel 12 in this embodiment and Figure 1 The difference between the display panel 11 and the display panel 12 lies in the fact that the substrates with viewing angle limiting structures are different. Specifically, the first viewing angle limiting structure layer 131A of the display panel 12 is disposed on the color filter substrate 200A. That is, its pixel array substrate 100A does not have a viewing angle limiting structure layer.

[0065] In this embodiment, the first viewing angle limiting structure layer 131A may be disposed between the second substrate 210 and the color filter layer 220, but is not limited thereto. Figure 3 In another embodiment of the display panel 13, the first viewing angle limiting structure layer 131B on the color filter substrate 200B may also be disposed between the cladding layer 230 and the plurality of spacers 250.

[0066] Figure 4 This is a cross-sectional schematic diagram of a display panel according to a fourth embodiment of the present invention. Please refer to... Figure 4 The display panel 14 in this embodiment and Figure 2 The main difference of the display panel 12 is that the first viewing angle limiting structure layer 131C of the display panel 14 can also simultaneously replace Figure 2 The light-shielding pattern layer 205 is located in the color filter substrate 200C. Specifically, in this embodiment, the plurality of first barrier structures 135a' of the first viewing angle limiting structure layer 131C disposed on the color filter substrate 200C can be respectively disposed between the plurality of first color filter patterns 221A, the plurality of second color filter patterns 222A and the plurality of third color filter patterns 223A of the color filter layer 220A, so as to simultaneously serve as the light-shielding pattern layer 205A.

[0067] Figure 5 This is a cross-sectional schematic diagram of a display panel according to the fifth embodiment of the present invention. Figure 6 yes Figure 5 A schematic diagram of the first-view confinement structure layer and the second-view confinement structure layer. Please refer to... Figure 5 The display panel 21 in this embodiment and Figure 1 The difference between the display panel 11 and the display panel 21 lies in the number of viewing angle limiting structure layers. Specifically, the display panel 21 has two viewing angle limiting structure layers: a first viewing angle limiting structure layer 131 and a second viewing angle limiting structure layer 132. For example, the first viewing angle limiting structure layer 131 is disposed on the pixel array substrate 100 and located between the first substrate 110 and the pixel driving layer 120. The second viewing angle limiting structure layer 132 is disposed on the color filter substrate 200D and located between the color filter layer 220 and the second substrate 210.

[0068] Please refer to the following at the same time Figure 6 In this embodiment, a plurality of first retaining wall structures 135a of the first view limiting structure layer 131 are arranged along a first direction and extend in a second direction, and a plurality of second retaining wall structures 135b of the second view limiting structure layer 132 are arranged along a third direction and extend in a fourth direction. The third direction is parallel to the second direction and perpendicular to the first direction, and the fourth direction is parallel to the first direction. In this embodiment, the first and fourth directions are, for example, direction Y, and the second and third directions are, for example, direction X, and direction X may optionally be perpendicular to direction Y, but is not limited thereto. In another embodiment not shown, the extension direction of the first retaining wall structure (i.e., the second direction) may not be parallel to or perpendicular to the extension direction of the second retaining wall structure (i.e., the fourth direction), meaning that the respective extension directions of the first and second retaining wall structures intersect each other but are not perpendicular to each other. In yet another embodiment, the extension direction of the first retaining wall structure (i.e., the second direction) may also be parallel to the extension direction of the second retaining wall structure (i.e., the fourth direction).

[0069] In this embodiment, the arrangement of multiple first barrier structures 135a and multiple second barrier structures 135b enables the display panel 21 to have viewing angle restriction capabilities that are parallel to or opposite to the Y direction and / or parallel to or opposite to the X direction. Therefore, a two-dimensional privacy protection effect can be achieved. Since the manufacturing processes of the first viewing angle restriction structure layer 131 and the second viewing angle restriction structure layer 132 can be integrated into the manufacturing processes of the pixel array substrate 100 and the color filter substrate 200D, respectively, there is no need to use additional substrates for the fabrication and attachment of the viewing angle restriction structure layers, which helps to significantly reduce the overall thickness of the display panel 21.

[0070] Figure 7 This is a cross-sectional schematic diagram of a display panel according to the sixth embodiment of the present invention. Figure 8 This is a cross-sectional schematic diagram of a display panel according to the seventh embodiment of the present invention. Please refer to... Figure 7 The display panel 22 in this embodiment and Figure 5 The difference between the display panel 21 and the display panel 21 lies in the different configuration of the second viewing angle limiting structure layer. Specifically, the second viewing angle limiting structure layer 132” on the color filter substrate 200D” is disposed between the cladding layer 230 and the plurality of spacers 250, and the extension direction of its second barrier structure 135b” is optionally parallel to the extension direction of the first barrier structure 135a of the first viewing angle limiting structure layer 131.

[0071] It should be noted that the arrangement spacing of the multiple first retaining wall structures 135a along the Y direction may be the same or different from the arrangement spacing of the multiple second retaining wall structures 135b" along the Y direction, depending on the design and application of the actual product, and the present invention does not impose any limitations on this.

[0072] However, the invention is not limited thereto. Figure 8 In the display panel 23, the second viewing angle limiting structure layer 132” on the color filter substrate 200E is disposed on the side surface 210s of the second substrate 210 facing away from the color filter layer 220.

[0073] On the other hand, Figure 7 or Figure 8 In some other variations, the extension direction of the second retaining wall structure 135b” may also intersect (e.g., be perpendicular to) the extension direction of the first retaining wall structure 135a of the first viewing angle limiting structure layer 131.

[0074] Figure 9 This is a cross-sectional schematic diagram of a display panel according to the eighth embodiment of the present invention. Please refer to... Figure 9 Unlike Figure 5In the display panel 21, both the first viewing angle limiting structure layer 131D and the second viewing angle limiting structure layer 132” of the display panel 24 in this embodiment are disposed on the color filter substrate 200F. Specifically, the first viewing angle limiting structure layer 131D is disposed between the spacer 250 and the color filter layer 220, and the second viewing angle limiting structure layer 132” is disposed on the side surface 210s of the second substrate 210 facing away from the color filter layer 220 and the first viewing angle limiting structure layer 131D.

[0075] In this embodiment, a plurality of first retaining wall structures 135a” of the first view limiting structure layer 131D are arranged along a first direction and extend in a second direction, and a plurality of second retaining wall structures 135b” of the second view limiting structure layer 132” are arranged along a third direction and extend in a fourth direction. The third direction intersects the fourth direction and the first direction. In this embodiment, the first and fourth directions are, for example, direction X, and the second and third directions are, for example, direction Y, and direction X may optionally be perpendicular to direction Y, but is not limited thereto.

[0076] In summary, in a display panel according to an embodiment of the present invention, a viewing angle limiting structure layer is provided on a pixel array substrate or a color filter substrate. The viewing angle limiting structure layer has multiple barrier structures that are separated from each other, and the arrangement and extension directions of these barrier structures can define the viewing angle limiting direction of the display panel and enable the display panel to have a viewing angle limiting function. By providing the viewing angle limiting structure layer on the side of the pixel array substrate where the pixel driving layer is located, or on the side of the color filter substrate where the color filter layer is located, the overall thickness of the display panel can be effectively reduced.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that, include: A pixel array substrate includes a first substrate and a pixel driving layer disposed on the first substrate; A color filter substrate is disposed opposite to the pixel array substrate, and includes a second substrate and a color filter layer disposed on the second substrate, wherein the color filter layer includes a plurality of color filter patterns; as well as A first viewing angle limiting structure layer is disposed between the second substrate and the color filter layer. The first viewing angle limiting structure layer includes a plurality of first barrier structures that are separated from each other. The plurality of first barrier structures are respectively disposed between the plurality of color filter patterns. The plurality of first barrier structures are arranged along a first direction and extend in a second direction, wherein the first direction intersects the second direction. The first viewing angle limiting structure layer also includes a protective layer that fills the spaces between the plurality of first barrier structures and is located between the second substrate and the color filter layer.

2. The display panel according to claim 1, characterized in that, Also includes: A display medium layer is disposed between the pixel array substrate and the color filter substrate.

3. A color filter substrate, characterized in that, include: substrate; A color filter layer is disposed on the substrate and includes multiple color filter patterns; as well as A first viewing angle limiting structure layer is disposed on the side of the substrate on which the color filter layer is provided and is located between the substrate and the color filter layer. The first viewing angle limiting structure layer includes a plurality of first barrier structures that are separated from each other. The plurality of first barrier structures are respectively disposed between the plurality of color filter patterns. The plurality of first barrier structures are arranged along a first direction and extend in a second direction, wherein the first direction intersects the second direction. The first viewing angle limiting structure layer also includes a protective layer that fills the spaces between the plurality of first barrier structures and is located between the substrate and the color filter layer.

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