Display panel and display device

Abstract

The utility model relates to a display panel and a display device. The display panel comprises an array substrate, a pixel definition layer and a filter layer. The pixel definition layer is arranged on one side of the array substrate, a plurality of pixel openings are formed in the pixel definition layer, and the pixel definition layer further comprises retaining walls arranged around the pixel openings; the light-emitting layer comprises a plurality of light-emitting parts arranged in the plurality of pixel openings; the filter layer is arranged on one side, far away from the array substrate, of the pixel definition layer; the display panel further comprises a shading structure arranged on the surface of the side, away from the array substrate, of the retaining wall, and the orthographic projection, on the array substrate, of the shading structure is located between the orthographic projections, on the array substrate, of the adjacent light-emitting parts. The light crosstalk between the adjacent light-emitting parts can be effectively reduced; according to the display panel, the shading structure is arranged in the display panel and matched with the light filtering layer, then the purpose of antireflection can be achieved, the contrast ratio of the display panel is improved, the shading structure and the light filtering layer are arranged in the display panel, and lightening, thinning and integration of the display panel are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] Organic Light-Emitting Diode (OLED) display panel has been widely applied in computer television, mobile phone, head-mounted display, augmented reality, virtual reality, mixed reality and other fields due to its low power consumption, fast response, wide viewing angle, high resolution, wide temperature characteristics and soft screen.

[0003] In order to improve the ambient contrast of OLED display panel, manufacturers have developed various technologies, such as adding an anti-reflection coating and a circular polarizer outside the OLED device. Although this method does a good job in reducing reflection, it will increase the thickness of the display panel, which is not conducive to the thinness and integration of the display panel. UTILITY MODEL CONTENT

[0004] The display panel and the display device provided by the embodiments of the present application can reduce reflection and improve the display effect of the display panel.

[0005] The display panel provided by the embodiments of the present application comprises:

[0006] an array substrate;

[0007] a pixel definition layer disposed on one side of the array substrate, the pixel definition layer comprising a plurality of pixel openings and a barrier wall disposed around the pixel openings;

[0008] a light-emitting layer comprising a plurality of light-emitting portions disposed in the pixel openings;

[0009] a light filtering layer disposed on the side of the pixel definition layer away from the array substrate;

[0010] The display panel further comprises a light shielding structure disposed on the surface of the barrier wall away from the array substrate, and the orthographic projection of the light shielding structure on the array substrate is located between the orthographic projections of adjacent light-emitting portions on the array substrate.

[0011] In an embodiment of the present application, the display panel further comprises a cathode layer disposed on the side of the pixel definition layer away from the array substrate, the cathode layer comprising a plurality of sub-electrodes arranged at intervals, the plurality of sub-electrodes being arranged correspondingly to the plurality of light-emitting portions, and the sub-electrodes being located on the side of the corresponding light-emitting portions away from the array substrate.

[0012] In an embodiment of the present application, the plurality of sub-electrodes are connected to the light-shielding structure.

[0013] In an embodiment of the present application, the display panel further comprises a cathode layer disposed on a side of the pixel definition layer away from the array substrate, the cathode layer covering the light-shielding structure and the plurality of light-emitting portions.

[0014] In an embodiment of the present application, the thickness of the light-shielding structure is greater than the thickness of the cathode layer.

[0015] In an embodiment of the present application, the light-shielding structure and the light-emitting portion do not overlap in the thickness direction of the display panel.

[0016] In an embodiment of the present application, the light-shielding structure has electrical conductivity.

[0017] In an embodiment of the present application, the light-filter layer comprises a plurality of color-resistance blocks, the plurality of color-resistance blocks are disposed corresponding to the plurality of light-emitting portions, and the color-resistance block is located on a side of the corresponding light-emitting portion away from the array substrate.

[0018] In an embodiment of the present application, the light-shielding structure has electrical conductivity.

[0019] According to the above purposes of the present application, the embodiments of the present application further provide a display device, which comprises the display panel.

[0020] The present application provides a display panel and a display device, by disposing a light-shielding structure on the barrier of the pixel definition layer, and the light-shielding structure is located between adjacent light-emitting portions, which can effectively reduce the light crosstalk between adjacent light-emitting portions; in combination with the light-filter layer, the anti-reflection purpose can be achieved, the contrast of the display panel is improved, and the light-shielding structure and the light-filter layer are both disposed in the display panel, which is beneficial to the thinning and integration of the display panel.

[0021] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0023] For a more complete understanding of the present application and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings in which like reference numerals indicate like parts:

[0024] Figure 1 A first structural schematic diagram of a display panel provided by an embodiment of the present application;

[0025] Figure 2 A second structural schematic diagram of a display panel provided by an embodiment of the present application;

[0026] Figure 3 A planar structural schematic diagram of a display panel provided by an embodiment of the present application;

[0027] Figure 4 A third structural schematic diagram of a display panel provided by an embodiment of the present application;

[0028] Figure 5 A structural schematic diagram of a display device provided by an embodiment of the present application.

[0029] Explanation of reference numerals:

[0030] 10, array substrate; 20, pixel definition layer; 21, barrier wall; 210, pixel opening; 30, light emitting layer; 31, light emitting part; 40, cathode layer; 41, sub-electrode; 50, light shielding structure; 60, encapsulation layer; 70, light filtering layer; 71, color resistance block; 80, display panel; 800, display device. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0032] Please refer to Figure 1 The present application provides a display panel 80, which comprises an array substrate 10, a pixel definition layer 20, a light emitting layer 30, a light filtering layer 70 and a light shielding structure 50. The pixel definition layer 20 is arranged on one side of the array substrate 10, and a plurality of pixel openings 210 are arranged in the pixel definition layer 20. The pixel definition layer 20 further comprises a barrier wall 21 arranged around the pixel openings 210. The light emitting layer 30 comprises a plurality of light emitting parts 31 arranged in the pixel openings 210. The light filtering layer 70 is arranged on the side of the pixel definition layer 20 away from the array substrate 10.

[0033] The light-shielding structure 50 is arranged on the surface of the barrier wall 21 away from the array substrate 10, and the orthographic projection of the light-shielding structure 50 on the array substrate 10 is located between the orthographic projections of adjacent light-emitting portions 31 on the array substrate 10.

[0034] In the implementation process, the embodiments of the present application can effectively reduce the light crosstalk between adjacent light-emitting portions 31 by arranging the light-shielding structure 50 on the barrier wall 21 of the pixel definition layer 20, and the light-shielding structure 50 is located between adjacent light-emitting portions 31. In combination with the light filtering layer 70, the anti-reflection purpose can be achieved, the contrast of the display panel 80 is improved, and the light-shielding structure 50 and the light filtering layer 70 are arranged in the display panel 80, which is beneficial to the thinning and integration of the display panel 80. Compared with the related art of attaching a polarizing sheet on the display panel 80, the transmittance of the display panel 80 can also be improved.

[0035] Please refer to Figure 1 In some embodiments, the array substrate 10 includes a substrate and a thin film transistor layer arranged on the substrate.

[0036] In some embodiments, the substrate can be a hard substrate, such as a glass substrate; or the substrate can be a flexible substrate, such as a substrate formed of polyimide. When the substrate is a flexible substrate, the substrate can be formed of multiple sub-substrates made of the same material, such as polyimide, and adjacent sub-substrates are bonded by a bonding sub-layer.

[0037] In some embodiments, the thin film transistor layer includes a thin film transistor including a semiconductor on the substrate, which can be formed of polycrystalline silicon or metal oxide (such as indium gallium zinc oxide). The semiconductor is divided into a channel region and a source region and a drain region formed on both sides of the channel region. The thin film transistor layer further includes a first gate insulating layer covering the semiconductor. The thin film transistor further includes a first gate formed on the first gate insulating layer, which overlaps the channel region. The first gate can be formed of multiple layers or a single layer including a low-resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material having high corrosion resistance. The thin film transistor layer further includes a second gate insulating layer covering the first gate. The thin film transistor further includes a second gate on the second gate insulating layer, which overlaps the first gate, and can be formed of multiple layers or a single layer including a low-resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material having high corrosion resistance. The thin film transistor layer further includes a first interlayer insulating layer formed on the second gate. The first interlayer insulating layer and the first gate insulating layer and the second gate insulating layer include a source contact hole and a drain contact hole, through which the source region and the drain region are exposed, respectively.

[0038] The thin film transistor further includes a source and a drain formed on the first interlayer insulating layer in the same layer, the source being connected to the source region through the source contact hole, and the drain being connected to the drain region through the drain contact hole. The source and the drain can be formed of multiple layers or a single layer of a low-resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material having high corrosion resistance. For example, the source and the drain can be a triple layer of Ti / Cu / Ti, Ti / Ag / Ti, Ti / Al / Ti, or Mo / Al / Mo, or other single layer or multiple layer structures.

[0039] In some embodiments, the array substrate 10 further includes a planarization layer on the side of the first interlayer insulating layer away from the substrate, which covers the source and the drain.

[0040] In some embodiments, the display panel 80 further includes an anode layer disposed on the array substrate 10, i.e., the anode layer is disposed on the side of the planarization layer away from the substrate. The anode layer includes a plurality of anodes disposed at intervals, and the anodes are connected to the source or the drain to achieve signal transmission.

[0041] In some embodiments, the pixel definition layer 20 is disposed on the side of the flat layer away from the substrate, i.e., the pixel definition layer 20 is disposed on the array substrate 10, and a plurality of pixel openings 210 are formed in the pixel definition layer 20, and the pixel definition layer 20 also includes a barrier wall 21 disposed around the plurality of pixel openings 210.

[0042] In some embodiments, the plurality of pixel openings 210 are disposed one-to-one corresponding to the plurality of anodes, and the pixel openings 210 expose part of the surface of the corresponding anodes.

[0043] In some embodiments, the light-emitting layer 30 is disposed on the pixel definition layer 20, and the light-emitting layer 30 includes a plurality of light-emitting portions 31, which are disposed corresponding to the plurality of pixel openings 210, and the light-emitting portions 31 are disposed in the corresponding pixel openings 210 and are located on the side of the anodes away from the array substrate 10.

[0044] In some embodiments, the cathode layer 40 is disposed on the side of the pixel definition layer 20 away from the light-emitting layer 30, and the cathode layer 40 covers the plurality of light-emitting portions 31. During the driving process of the display panel 80, the light-emitting portions 31 located between the anodes and the cathode layer 40 can be made to emit light by loading voltage on the anodes and the cathode layer 40.

[0045] In some embodiments, the cathode layer 40 can be a transparent conductive electrode, and the material of the cathode layer 40 can include at least one of silver and indium tin oxide (ITO).

[0046] In the embodiments of the present application, the display panel 80 further includes a light shielding structure 50 disposed on the side of the barrier wall 21 away from the array substrate 10. The light shielding structure 50 can be a dark structure, such as black, which can shield or absorb light. The orthographic projection of the light shielding structure 50 on the array substrate 10 is located between the orthographic projections of adjacent light-emitting portions 31 on the array substrate 10, so that the light shielding structure 50 can obliquely shield the light emitted by the adjacent light-emitting portions 31, thereby reducing the probability of light crosstalk between the adjacent light-emitting portions 31.

[0047] It can be understood that the light shielding structure 50 is disposed on the surface of the barrier wall 21 away from the array substrate 10, and the light shielding structure 50 is in direct contact with the array substrate 10, thereby effectively reducing the distance between the light shielding structure 50 and the light-emitting layer 30, improving the degree of oblique light shielding of the light shielding structure 50 on the light-emitting portions 31, and more conducive to improving the light crosstalk.

[0048] In some embodiments, the structure of the light shielding structure 50 comprises graphene or a conductive polymer, and the conductive polymer can include at least one of poly(3,4-ethylenedioxythiophene) and polybenzodifuranone; it should be noted that the conductive polymer can be more easily formed into a film than graphene, which can effectively improve the yield of the light shielding structure 50 and simplify the process of the light shielding structure 50.

[0049] Further, the display panel 80 further comprises a filter layer 70 disposed on the side of the pixel definition layer 20 away from the array substrate 10, i.e., the filter layer 70 is located on the side of the light emitting layer 30 away from the array substrate 10, and the filter layer 70 can be used to transmit light in a predetermined wavelength range and absorb light in other wavelength ranges; the combination of the light shielding structure 50 and the filter layer 70 in the embodiments of the present application can play a role in filtering and reducing reflection, for example, it can reduce the reflection of ambient light and improve the contrast of the display panel 80; and compared with the related art in which a polarizing sheet is attached to the display panel 80, the light shielding structure 50 and the filter layer 70 in the embodiments of the present application are disposed in the display panel 80, which can be beneficial to the thinning and integration of the display panel 80 and improve the transmittance of the display panel 80.

[0050] In some embodiments, the filter layer 70 can include a plurality of color resistance blocks 71, and the plurality of color resistance blocks 71 are disposed corresponding to the plurality of light emitting parts 31, the color resistance block 71 is located on the side of the corresponding light emitting part 31 away from the array substrate 10, so as to play a role in filtering light passing through the color resistance block 71, and the color of the color resistance block 71 is the same as the color of the corresponding light emitting part 31; for example, the light emitting part 31 can be used to emit red light, and the color resistance block 71 corresponding to the light emitting part 31 corresponds to a red color resistance block, the light emitting part 31 can be used to emit green light, and the color resistance block 71 corresponding to the light emitting part 31 corresponds to a green color resistance block, and the light emitting part 31 can be used to emit blue light, and the color resistance block 71 corresponding to the light emitting part 31 corresponds to a blue color resistance block.

[0051] In some embodiments, the display panel 80 further comprises an encapsulation layer 60 covering the light shielding structure 50 and the cathode layer 40, and the filter layer 70 is disposed on the side of the encapsulation layer 60 away from the cathode layer 40.

[0052] In some embodiments, the light-emitting part 31 has a projection on the array substrate 10, which is located within the projection of the color-resistance block 71 on the array substrate 10. In this case, the color-resistance block 71 extends to the area outside the pixel opening 210. The light-shielding structure 50 has a projection on the array substrate 10, which partially overlaps with the projection of the color-resistance block 71 on the array substrate 10. The light-shielding structure 50 does not overlap with the light-emitting part 31 along the thickness direction of the display panel 80, so as to avoid affecting the normal light emission of the light-emitting part 31.

[0053] In some embodiments, referring to Figure 2 , the color-resistance blocks 71 are intersected with each other. In this case, the light-shielding area can be formed at the intersected color-resistance blocks 71, so as to further reduce the light crosstalk.

[0054] In some embodiments, the thickness of the light-shielding structure 50 is greater than the thickness of the cathode layer 40, so that the light-shielding structure 50 can effectively reduce the light crosstalk.

[0055] In some embodiments, the thickness of the light-shielding structure 50 is greater than or equal to 10 nm and less than or equal to 200 nm, and the thickness of the encapsulation layer 60 is greater than or equal to 50 nm and less than or equal to 100 nm.

[0056] It can be understood that the embodiments of the present application can further include a hole injection layer and a hole transport layer arranged between the anode and the light-emitting part 31, and an electron transport layer and an electron injection layer arranged between the cathode layer 40 and the light-emitting part 31. The light-emitting part 31, the hole injection layer, the hole transport layer, the electron transport layer and the electron injection layer can all be prepared by an inkjet printing process.

[0057] In a specific embodiment of the present application, referring to Figure 1 and Figure 3 , the barrier wall 21 is arranged around the pixel opening 210 and the light-emitting part 31. The light-shielding structure 50 is arranged on the side of the barrier wall 21 away from the array substrate 10. The light-shielding structure 50 is also arranged around a plurality of pixel openings 210 and light-emitting parts 31.

[0058] The cathode layer 40 includes a plurality of sub-electrodes 41 arranged at intervals. The plurality of sub-electrodes 41 are arranged corresponding to the plurality of light-emitting parts 31. The sub-electrode 41 is located on the side of the corresponding light-emitting part 31 away from the array substrate 10, i.e. on the side of the corresponding light-emitting part 31 away from the array substrate 10.

[0059] The light shielding structure 50 is arranged around the plurality of sub-electrodes 41, and the plurality of sub-electrodes 41 are connected with the light shielding structure 50, so that the plurality of sub-electrodes 41 and the light shielding structure 50 form a structure of covering the whole surface.

[0060] In some embodiments, the display panel includes a display area and a non-display area adjacent to the display area, and the display panel further includes a VSS power signal line arranged in the non-display area. The sub-electrodes 41 are arranged at least in the display area and partially extend into the non-display area to be connected with the VSS power signal line, or the light shielding structure 50 is arranged at least in the display area and partially extends into the non-display area to be connected with the VSS power signal line, so as to realize signal input of the cathode layer 40.

[0061] In the embodiment, the light shielding structure 50 has electrical conductivity, and the plurality of sub-electrodes 41 are connected through the light shielding structure 50, so as to realize electrical transmission effect of the cathode layer 40.

[0062] It should be noted that the light shielding structure 50 can be made of black conductive material, so that the light shielding structure 50 has electrical conductivity, thermal conductivity and light shielding property. For example, the thermal conductivity of the light shielding structure 50 is greater than that of the cathode layer 40. Therefore, on the basis of realizing electrical transmission of the cathode layer 40, the embodiment of the present application can also improve the heat conduction effect and heat dissipation effect of the cathode layer 40.

[0063] In another specific embodiment of the present application, referring to Figure 4 , the barrier wall 21 is arranged around the pixel opening 210 and the light emitting part 31, and the light shielding structure 50 is located on a side of the barrier wall 21 away from the array substrate 10, and the light shielding structure 50 is also arranged around the plurality of pixel openings 210 and the light emitting part 31.

[0064] The cathode layer 40 covers the light shielding structure 50 and the plurality of light emitting parts 31. Specifically, the cathode layer 40 covers the surface of the light emitting part 31 away from the array substrate 10, the top surface of the light shielding structure 50 away from the array substrate 10 and the side surface connected to the top surface. The cathode layer 40 is an integral layer covering the light emitting layer 30, and the light shielding structure 50 is located on the barrier wall 21 and connected with the cathode layer 40. The light shielding structure 50 has electrical conductivity, and can be reused as an auxiliary electrode of the cathode layer 40, so as to reduce the surface resistance of the cathode layer 40 and improve the display uniformity of the display panel 80.

[0065] It can be understood that the cathode layer 40 covers the top surface and the side surface of the light shielding structure 50, compared to the display panel structure in which the cathode layer is first provided on the whole surface and then the light shielding structure is provided on the side surface of the cathode layer away from the barrier wall, the embodiment of the present application can increase the contact area of the cathode layer 40 and the light shielding structure 50, and thus can further reduce the surface resistance of the cathode layer 40 and improve the display uniformity of the display panel 80.

[0066] In some embodiments, the display panel includes a display area and a non-display area adjacent to the display area, and the display panel further includes a VSS power signal line provided in the non-display area, the cathode layer 40 is at least provided in the display area and partially extends into the non-display area to be connected with the VSS power signal line, or the light shielding structure 50 is at least provided in the display area and partially extends into the non-display area to be connected with the VSS power signal line, so as to realize the signal input of the cathode layer 40.

[0067] As described above, the embodiment of the present application can effectively reduce the light crosstalk between the adjacent light emitting parts 31 by providing the light shielding structure 50 on the barrier wall 21 of the pixel definition layer 20 and locating the light shielding structure 50 between the adjacent light emitting parts 31; in combination with the light filtering layer 70, the anti-reflection purpose can be achieved, the contrast of the display panel 80 is improved, and the light shielding structure 50 and the light filtering layer 70 are both provided in the display panel 80, which is beneficial to the thinning and integration of the display panel 80; compared to the related art in which the polarizing sheet is attached on the display panel 80, the transmittance of the display panel 80 can be further improved.

[0068] In addition, referring to Figure 5 The embodiment of the present application further provides a display device 800, which includes the display panel 80 described in the above embodiment.

[0069] It can be understood that, since the display device 800 has the same display panel 80 as in the above embodiment, the display device 800 has the same beneficial effects as the display panel 80 in the above embodiment, which will not be described herein again.

[0070] In the description of the present application, the terms “first”, “second” are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first”, “second” can explicitly or implicitly include one or more features. In the description of the present application, the meaning of “multiple” is two or more, unless otherwise specifically limited.

[0071] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0072] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0073] The above are only the preferred embodiments of the present application, and do not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution content of the present application and in accordance with the technical essence of the present application still belongs to the scope of the technical solution of the present application.

Claims

1. A display panel, characterized by, The display panel comprises: an array substrate; a pixel definition layer disposed on one side of the array substrate, the pixel definition layer comprising a plurality of pixel openings, and further comprising a barrier wall disposed around the pixel openings; a light-emitting layer comprising a plurality of light-emitting portions disposed in the pixel openings; a filter layer disposed on a side of the pixel definition layer distal to the array substrate; wherein the display panel further comprises a light-shielding structure disposed on a surface of the barrier wall distal to the array substrate, a normal projection of the light-shielding structure on the array substrate being located between normal projections of adjacent light-emitting portions on the array substrate.

2. The display panel of claim 1, wherein, The display panel further comprises a cathode layer disposed on a side of the pixel definition layer distal to the array substrate, the cathode layer comprising a plurality of sub-electrodes disposed at intervals, the plurality of sub-electrodes being disposed in correspondence with the plurality of light-emitting portions, and the sub-electrodes being located on a side of the corresponding light-emitting portions distal to the array substrate.

3. The display panel of claim 2, wherein, The plurality of sub-electrodes are connected to the light-shielding structure.

4. The display panel of claim 1, wherein, The display panel further comprises a cathode layer disposed on a side of the pixel definition layer distal to the array substrate, the cathode layer covering the light-shielding structure and the plurality of light-emitting portions.

5. The display panel of any one of claims 2 to 4, wherein, The thickness of the light-shielding structure is greater than the thickness of the cathode layer.

6. The display panel of any one of claims 1 to 4, wherein, The light-shielding structure and the light-emitting portions do not overlap in the thickness direction of the display panel.

7. The display panel of any one of claims 1 to 4, wherein, The light-shielding structure has electrical conductivity.

8. The display panel of any one of claims 1 to 4, wherein, The filter layer comprises a plurality of color resist blocks, the plurality of color resist blocks being disposed in correspondence with the plurality of light-emitting portions, and the color resist blocks being located on a side of the corresponding light-emitting portions distal to the array substrate.

9. The display panel of claim 8, wherein, A normal projection of the light-shielding structure on the array substrate partially overlaps with a normal projection of the color resist blocks on the array substrate.

10. A display device, characterized by comprising: The display device comprises the display panel of any one of claims 1 to 9.

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