Display panel and display device

Abstract

The utility model discloses a display panel and a display device. The display panel comprises: a substrate; the light-emitting functional layer is arranged on one side of the substrate; the light-emitting functional layer comprises a patterned cathode layer, the cathode layer comprises blocky cathodes arranged in an array and a plurality of cathode connecting parts, and the blocky cathodes are connected through the cathode connecting parts; the light filtering layer is arranged on one side, far away from the substrate, of the cathode layer and comprises a plurality of color light filtering parts and shielding parts, and the color light filtering parts and the shielding parts are alternately arranged at intervals; the shielding part is arranged corresponding to the cathode connecting part, and the orthographic projection of the shielding part on the substrate covers the orthographic projection of the cathode connecting part on the substrate; and the orthographic projection of the color filter part on the substrate covers the orthographic projection of the blocky cathode on the substrate. According to the technical scheme, the patterned cathode layer is arranged, the side length proportion relation between the shielding part and the pixels can be controlled when the shielding part is arranged, the symmetry of brightness of different viewing angles of the panel is improved, and the display effect of the display panel is improved.

Description

Technical Field

[0001] The utility model relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] In order to obtain a larger aperture ratio, most existing OLED (Organic Light-Emitting Diode) devices now use top emission. While improving efficiency, it also leads to a significant increase in reflectivity. Polarizers are needed to reduce the reflection of the panel. The replacement of polarizers is particularly important under current demand. Existing polarizer replacement solutions mainly use a combination of color filters and black matrix shielding to reduce reflectivity and increase brightness. However, the introduction of the black matrix will cause the viewing angle brightness of the panel to be greatly attenuated, resulting in a poor visual effect of the viewing angle. Utility Model Content

[0003] The utility model provides a display panel and a display device to solve the technical problems that the reflectivity of the existing display panel is high and the brightness of the display panel is greatly attenuated during viewing angle.

[0004] According to one aspect of the present invention, there is provided a display panel, comprising:

[0005] substrate substrate;

[0006] A light-emitting functional layer is arranged on one side of the substrate; the light-emitting functional layer includes a patterned cathode layer, the cathode layer includes array-arranged block cathodes and a plurality of cathode connecting portions, and the block cathodes are connected through the cathode connecting portions;

[0007] A filter layer is arranged on the side of the cathode layer away from the base substrate, the filter layer includes a plurality of color filter parts and shielding parts, the color filter parts and the shielding parts are arranged alternately and at intervals; the shielding part is arranged corresponding to the cathode connecting part, and the orthographic projection of the shielding part on the base substrate covers the orthographic projection of the cathode connecting part on the base substrate; the orthographic projection of the color filter part on the base substrate covers the orthographic projection of the block cathode on the base substrate.

[0008] Optionally, the light-emitting functional layer corresponds to a plurality of sub-pixels, and the width of the cathode connecting portion is less than or equal to the minimum side length of the sub-pixels.

[0009] Optionally, the block cathode has a polygonal shape, and the cathode connecting portion has a rectangular shape.

[0010] Optionally, the width of the shielding portion is smaller than the length of each side of the block cathode;

[0011] Optionally, the ratio of each side length of the block cathode to the width of the cathode connecting portion connected to the farthest side of the side length is equal.

[0012] Optionally, the shielding portion includes black photoresist.

[0013] Optionally, the light-emitting functional layer includes light-emitting layers of at least three different colors, and the filter layer includes color filter portions of at least three different colors;

[0014] The color filter parts and the light-emitting layer of the same color are arranged correspondingly along the thickness direction of the display panel.

[0015] Optionally, the display panel further includes:

[0016] The insulating layer is arranged between the filter layer and the cathode layer.

[0017] Optionally, the display panel further includes:

[0018] The protection layer is arranged on a side of the filter layer away from the base substrate.

[0019] According to another aspect of the present invention, a display device is provided, comprising the display panel provided by the first aspect of the present invention.

[0020] The technical solution of the embodiment of the utility model is to set a patterned cathode layer so that the cathode layer includes block cathodes and cathode connecting parts connecting the block cathodes. When a shielding part is set to cover the cathode connecting part, the area of ​​the shielding part can be effectively controlled to prevent the light output of the large viewing angle panel from being blocked by the shielding part, thereby improving the attenuation of the viewing angle brightness; by controlling the ratio of the side length of the shielding part to the pixel, the symmetry of the viewing angle brightness of the panel in different directions is improved, thereby further improving the display effect of the display panel.

[0021] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the utility model, nor is it intended to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of a top view structure of a cathode layer of a display panel provided according to an embodiment of the utility model;

[0024] Figure 2 According to the embodiment of the present utility model Figure 1 A schematic diagram of a partial cross-sectional structure of a display panel along the AA direction;

[0025] Figure 3 According to the embodiment of the present utility model Figure 1 A schematic diagram of a partial cross-sectional structure of a display panel along the BB direction;

[0026] Figure 4 According to the embodiment of the present utility model Figure 1 A schematic diagram of a partial cross-sectional structure of a display panel along the CC direction;

[0027] Figure 5 It is a schematic diagram of a top view structure of a cathode layer of another display panel provided according to an embodiment of the utility model;

[0028] Figure 6 It is a schematic diagram of a partial cross-sectional structure of another display panel provided according to an embodiment of the utility model. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] Figure 1 is a schematic diagram of a top view structure of a cathode layer of a display panel provided according to an embodiment of the utility model, Figure 2 According to the embodiment of the present utility model Figure 1A schematic diagram of a partial cross-sectional structure of a display panel along the AA direction. Figure 1 and Figure 2 The display panel includes: a substrate 100; a light-emitting functional layer 200 arranged on one side of the substrate 100; the light-emitting functional layer 200 includes a patterned cathode layer 300, the cathode layer 300 includes a block cathode 310 and a plurality of cathode connecting portions 320 arranged in an array, and the block cathodes 310 are connected through the cathode connecting portions 320; a filter layer 400 is arranged on the side of the cathode layer 300 away from the substrate 100, the filter layer 400 includes a plurality of color filter portions 410 and a shielding portion 420, and the color filter portions 410 and the shielding portion 420 are arranged at intervals; the shielding portion 420 is arranged corresponding to the cathode connecting portion 320, and the orthographic projection of the shielding portion 420 on the substrate 100 covers the orthographic projection of the cathode connecting portion 320 on the substrate 100; the orthographic projection of the color filter portion 410 on the substrate 100 covers the orthographic projection of the block cathode 310 on the substrate 100.

[0032] Specifically, the base substrate 100 is a base for supporting other film layers of the display panel. The light-emitting functional layer 200 includes an anode layer, a light-emitting layer and a patterned cathode layer 300. The anode layer includes anodes arranged in an array, and the anode, the light-emitting layer and the corresponding block cathode above can constitute sub-pixels. After the display panel is powered on, there is a voltage difference between the anode layer and the cathode layer 300, which causes the light-emitting layer to emit light, also known as controlling the light emission of the sub-pixels. The cathode layer 300 can be a semi-transmissive and semi-reflective metal layer composed of magnesium, silver or other metals. The cathode layer 300 includes block cathodes 310 arranged in an array and a plurality of cathode connecting parts 320. The block cathodes 310 are connected by the cathode connecting parts 320 to ensure the conduction of the cathode layer 300. The block cathodes 310 are arranged corresponding to the sub-pixels, so that the light emitted by the sub-pixels is uniformly transmitted through the block cathodes 310. The filter layer 400 includes a plurality of color filter parts 410 and a shielding part 420. The color filter 410 may be a color photoresist, and the light emitted by the sub-pixel can be filtered into the same color of the color filter 410 after passing through the color filter 410, thereby realizing color display. The orthographic projection of the color filter 410 on the substrate 100 covers the orthographic projection of the block cathode 310 on the substrate 100, so that most of the light emitted by the sub-pixel can be filtered into light of the corresponding color by the color filter 410 after passing through the block cathode 310. The shielding portion 420 is used to absorb external light to reduce the reflectivity of the display panel and improve the brightness of the display panel. If the area of ​​the shielding portion 420 is too large, the viewing angle brightness of the display panel will be greatly attenuated, resulting in a poor display effect of the display panel. The orthographic projection of the shielding portion 420 on the substrate 100 covers the orthographic projection of the cathode connecting portion 320 on the substrate 100, which can effectively control the area of ​​the shielding portion 420, thereby taking into account the reflectivity of the display panel, improving the symmetry of the viewing angle brightness of the display panel in different directions, and improving the display effect of the display panel.

[0033] The technical solution provided by the embodiment of the utility model is to set a patterned cathode layer, and the cathode layer includes block cathodes and cathode connecting parts connecting each block cathode. When setting the color filter part and the shielding part of the filter layer, the cathode layer is also patterned, the color filter part and the block cathode are set correspondingly, the shielding part and the cathode connecting part are set, and it is ensured that the orthographic projection of the color filter part on the substrate covers the orthographic projection of the block cathode on the substrate, and the orthographic projection of the shielding part on the substrate covers the orthographic projection of the cathode connecting part on the substrate. In this way, the area of ​​the shielding part can be effectively controlled to prevent the light output of the display panel from being blocked by the shielding part, thereby improving the brightness attenuation of the viewing angle of the display panel, improving the symmetry of the brightness of the viewing angle of the display panel, and enhancing the display effect.

[0034] Optionally, based on the above embodiment, the light-emitting functional layer 200 corresponds to a plurality of sub-pixels, and the width of the cathode connecting portion 320 is less than or equal to the minimum side length of the sub-pixel.

[0035] Specifically, the shape of the sub-pixel corresponding to the light-emitting functional layer 200 may refer to the shape of the vertical projection of the sub-pixel on the substrate, and the shape of the sub-pixel may be a polygon. The width of the cathode connection portion is the side length of the cathode connection portion where the block cathode and the cathode connection portion are connected. The width of the cathode connection portion is less than or equal to the minimum side length of the sub-pixel, which can reduce the area of ​​the cathode connection portion, and the area enclosed between the cathode connection portion and the block cathode is a hollow area, thereby improving the light transmission efficiency of the cathode layer and the brightness of the display panel.

[0036] Optionally, Figure 5 FIG. 1 is a schematic diagram of a top view structure of a cathode layer of another display panel provided according to an embodiment of the present utility model. Figure 1 and Figure 5 The shape of the block cathode 310 includes a polygon, and the shape of the cathode connecting part 320 includes a rectangle.

[0037] Specifically, the block cathode 310 may be in the shape of a polygon with unequal side lengths. The shape of the block cathode 310 is not specifically limited in this embodiment. Figure 1 In the example, the block cathode 310 is set to be a rectangle, and the first side length of the block cathode 310 is a, and the second side length is b. Figure 5 In the example, the block cathodes 310 are arranged in a hexagonal shape. The cathode connecting portion 320 may be in a rectangular shape. The cathode connecting portion 320 connects the block cathodes 310 along the width direction of the rectangle.

[0038] Optionally, Figure 3 According to the embodiment of the present utility model Figure 1 A schematic diagram of a partial cross-sectional structure of a display panel along the BB direction; Figure 4 According to the embodiment of the present utility model Figure 1 FIG. 1 is a schematic diagram of a partial cross-sectional structure of a display panel along the CC direction. Based on the above embodiment, see Figure 1 , Figure 3 and Figure 4 , the width of the shielding portion 420 is smaller than the length of each side of the block cathode 310 .

[0039] Specifically, Figure 1Taking the case where the block cathode 310 is a rectangle, the width of the shielding portion 420 along the BB direction is a1, which is smaller than the first side length a of the block cathode 310, and is also smaller than the second side length b of the block cathode 310. The width of the shielding portion 420 along the CC direction is b1, which is smaller than the first side length a of the block cathode 310, and is also smaller than the second side length b of the block cathode 310. The width of the shielding portion 420 is smaller than the respective side lengths of the block cathode 310, which can effectively control the area of ​​the shielding portion 420, reduce the light of the display panel blocked by the shielding portion, and thus improve the viewing angle brightness attenuation of the display panel.

[0040] Optionally, based on the above embodiment, see Figure 1 and Figure 5 The ratio of each side length of the block cathode 310 to the width of the cathode connecting portion 320 connected to the farthest side of the side length is equal.

[0041] Specifically, Figure 1 Take the case where the block cathode 310 is a rectangle. The first side length of the block cathode 310 is a, and the second side length of the block cathode 310 is b. The width of the cathode connecting portion 320 farthest from the first side length a of the block cathode 310 is d, and the width of the cathode connecting portion 320 farthest from the second side length b of the block cathode 310 is c. The ratio of each side length of the block cathode 310 to the width of the cathode connecting portion 320 farthest from the side length is equal, that is, d / a=c / b. Figure 5 Taking the hexagonal block cathode 310 as an example, the first side length of the block cathode 310 is x, and the width of the cathode connecting portion 320 farthest from the first side length x of the block cathode 310 is x1; the second side length of the block cathode 310 is y, and the width of the cathode connecting portion 320 farthest from the second side length y of the block cathode 310 is y1; the third side length of the block cathode 310 is z, and the width of the cathode connecting portion 320 farthest from the third side length z of the block cathode 310 is z1. The ratio of each side length of the block cathode 310 to the width of the cathode connecting portion 320 connected to the farthest side of the side length is equal, that is, x / x1=y / y1=z / z1. Since the shielding portion 420 is arranged corresponding to the cathode connecting portion 320, and the orthographic projection of the shielding portion 420 on the base substrate covers the orthographic projection of the cathode connecting portion 320 on the base substrate, such an arrangement can also effectively control the side length ratio of the shielding portion 420, so that the brightness attenuation rates in each viewing angle direction of the display panel are equivalent, thereby improving the symmetry of the viewing angle brightness of the display panel in different directions.

[0042] Optionally, based on the above embodiment, see Figure 2 The shielding portion 420 includes a black photoresist.

[0043] Specifically, the shielding portion 420 may include a black photoresist material, which can absorb excess light to reduce light crosstalk between two adjacent sub-pixels, reduce light scattering and reflection, thereby improving image contrast, making the display clearer and sharper, and improving the display effect of the display panel.

[0044] Optionally, based on the above embodiment, see Figure 2 The light-emitting functional layer includes at least three light-emitting layers 210 of different colors, and the filter layer 400 includes at least three color filter portions 410 of different colors; the color filter portions 410 of the same color are arranged corresponding to the light-emitting layers 210 along the thickness direction of the display panel.

[0045] Specifically, the light emitting layer 210 may include sub-pixels of three different colors: red, green, and blue, and the filter layer 400 may include color filter portions 410 of three different colors: red, green, and blue. Along the thickness direction of the display panel, the red filter portion is correspondingly arranged above the red sub-pixel, the green filter portion is correspondingly arranged above the green sub-pixel, and the blue filter portion is correspondingly arranged above the blue sub-pixel.

[0046] Optionally, Figure 6 FIG. 1 is a partial cross-sectional structural diagram of another display panel provided according to an embodiment of the present utility model. Figure 6 The display panel further includes: an insulating layer 500 disposed between the filter layer 400 and the cathode layer 300 .

[0047] Specifically, the insulating layer 500 may be composed of one or more inorganic / organic thin films. The insulating layer 500 can prevent water and oxygen from entering the light-emitting functional layer 200, thereby increasing the service life of the display panel.

[0048] Optionally, based on the above embodiment, continue to refer to Figure 6 The display panel further includes: a protective layer 600 disposed on a side of the filter layer 400 away from the base substrate 100 .

[0049] Specifically, the protective layer 600 may include a transparent resin material. Providing the protective layer 600 above the color filter 410 and the shielding portion 420 can make the surface of the display panel flat, achieve the flatness of the entire surface of the display panel, and protect the color filter 410 and the shielding portion 420 from damage.

[0050] According to another aspect of the present invention, a display device is provided, comprising the display panel provided by the first aspect of the present invention, which has the same beneficial effects as the display panel provided by any of the above embodiments, and will not be described in detail herein.

[0051] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0052] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A display panel, characterized in that: include: substrate substrate; A light-emitting functional layer is arranged on one side of the substrate; the light-emitting functional layer includes a patterned cathode layer, the cathode layer includes array-arranged block cathodes and a plurality of cathode connecting portions, and the block cathodes are connected through the cathode connecting portions; A filter layer is arranged on the side of the cathode layer away from the base substrate, the filter layer comprises a plurality of color filter parts and shielding parts, the color filter parts and the shielding parts are arranged alternately and at intervals; the shielding parts are arranged corresponding to the cathode connecting parts, and the orthographic projection of the shielding parts on the base substrate covers the orthographic projection of the cathode connecting parts on the base substrate; The orthographic projection of the color filter portion on the base substrate covers the orthographic projection of the block cathode on the base substrate.

2. The display panel according to claim 1, characterized in that: The light-emitting functional layer corresponds to a plurality of sub-pixels, and the width of the cathode connecting portion is less than or equal to the minimum side length of the sub-pixels.

3. The display panel according to claim 1, characterized in that: The block cathode has a polygonal shape, and the cathode connecting portion has a rectangular shape.

4. The display panel according to claim 3, characterized in that: The width of the shielding portion is smaller than the length of each side of the block cathode.

5. The display panel according to claim 3, characterized in that: The ratio of each side length of the block cathode to the width of the cathode connecting portion connected to the farthest side of the side length is equal.

6. The display panel according to claim 1, characterized in that: The shielding portion includes a black photoresist.

7. The display panel according to claim 1, characterized in that: The light-emitting functional layer includes at least three light-emitting layers of different colors, and the filter layer includes at least three color filter parts of different colors; The color filter parts and the light-emitting layer of the same color are arranged correspondingly along the thickness direction of the display panel.

8. The display panel according to claim 1, characterized in that: Also includes: The insulating layer is arranged between the filter layer and the cathode layer.

9. The display panel according to claim 1, characterized in that: Also includes: The protection layer is arranged on a side of the filter layer away from the base substrate.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 9.

Images