Display panel and display device

Abstract

This application provides a display panel and a display device. The display panel includes an array substrate; a light-emitting layer disposed on one side of the array substrate in a first direction; the light-emitting layer includes a plurality of display pixels and a plurality of interference pixels arranged at intervals, the interference pixels being used to generate emitted light of a set color; and a light-filtering layer disposed on the side of the light-emitting layer opposite to the array substrate, the light-filtering layer including a first light-absorbing portion capable of absorbing photons to generate a photoelectric effect, the first light-absorbing portion covering the light-emitting side of the interference pixels in the first direction. The display panel provided by this application has both power generation and privacy protection functions.

Description

Technical Field

[0001] This application belongs to the field of display technology, and more specifically, relates to a display panel and a display device. Background Technology

[0002] A solar-powered display panel integrates image display and solar power generation. Under sunlight, it generates directional current for the display panel to use or store in a battery. A privacy-protected display panel prevents the user from viewing the correct image outside of the viewing angle 'a'. However, display panels in related technologies are not compatible with both solar power generation and privacy protection functions. Summary of the Invention

[0003] The purpose of this application is to provide a display panel and a display device to solve the technical problem that existing display panels are incompatible with solar power generation and privacy protection functions.

[0004] In a first aspect, embodiments of this application provide a display panel.

[0005] The present application provides a display panel array substrate; a light-emitting layer is disposed on one side of the array substrate in a first direction; the light-emitting layer includes a plurality of display pixels and a plurality of interference pixels arranged at intervals, the interference pixels being used to generate emitted light of a set color; a filter layer is disposed on the side of the light-emitting layer away from the array substrate, the filter layer including a first light-absorbing portion, the first light-absorbing portion being capable of absorbing photons to generate a photoelectric effect, and in the first direction, the first light-absorbing portion covers the light-emitting side of the interference pixels.

[0006] The beneficial effects of the display panel provided in this application embodiment are as follows: Compared with the prior art, the interference pixels of the display panel provided in this application embodiment are used to display interference image information. The first light-absorbing part covers the light-emitting side of the interference pixel, preventing the light emitted by the interference pixel from entering the viewing angle, so that the light emitted by the interference pixel can only illuminate outside the viewing angle, thus giving the display panel provided in this application embodiment a privacy function. The first light-absorbing part can generate photocurrent under illumination, thereby giving the display panel provided in this application embodiment a power generation function. In summary, the display panel provided in this application embodiment has both power generation and privacy functions.

[0007] Optionally, the display panel further includes a first electrode layer and a second electrode layer, the first electrode layer and the second electrode layer being respectively disposed on both sides of the first light-absorbing portion in the first direction, and both the first electrode layer and the second electrode layer being electrically connected to the first light-absorbing portion;

[0008] The display panel includes a display area and a non-display area. A plurality of display pixels and a plurality of interference pixels are disposed in the display area. The display panel also includes a power storage unit disposed in the non-display area. The first electrode layer and the second electrode layer are both electrically connected to the power storage unit.

[0009] Optionally, a portion of the first light-absorbing portion is arranged concave towards the array substrate.

[0010] Optionally, the light-emitting layer includes a pixel definition layer having an opening. Each of the plurality of display pixels and the plurality of interference pixels includes an anode layer, an organic light-emitting layer, and a cathode layer stacked in a direction away from the array substrate. The anode layer is disposed on the side of the pixel definition layer facing the array substrate and exposed in the opening. The organic light-emitting layer is disposed within the opening and connected to the anode layer. The cathode layer is connected to the organic light-emitting layer.

[0011] The filter layer further includes a second light-absorbing portion, which is capable of absorbing photons to generate a photoelectric effect. In the first direction, the second light-absorbing portion covers at least a portion of the pixel definition layer.

[0012] Optionally, for the light emitted by the interfering pixel, the transmittance of the first light-absorbing portion in the first direction is less than or equal to 20%.

[0013] Optionally, the filter layer includes a light-shielding portion located on the side of the first light-absorbing portion away from the interfering pixel in the first direction, and in the first direction, the light-shielding portion covers the light-emitting side of the interfering pixel;

[0014] The color of the filter is different from the color of the light emitted by the interfering pixel.

[0015] Optionally, the filter layer further includes a light-transmitting portion, which covers the light-emitting side of the display pixel, and the light transmittance of the light-transmitting portion is greater than the light transmittance of the first light-absorbing portion;

[0016] The light-transmitting part includes a photoelectric conversion material, and the interference filter part can absorb photons to generate a photoelectric effect.

[0017] Optionally, the filter layer is integrally formed, and the thickness of the light-transmitting part in the first direction is smaller than the thickness of the first light-absorbing part in the first direction.

[0018] Optionally, the side of the light-emitting layer facing away from the array substrate is provided with a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer stacked along the first direction. The first inorganic encapsulation layer covers the surface of the light-emitting layer facing away from the array substrate, and the organic encapsulation layer covers the surface of the first inorganic encapsulation layer facing away from the array substrate.

[0019] The filter layer is located between the organic encapsulation layer and the second inorganic encapsulation layer, or the second inorganic encapsulation layer is located between the organic encapsulation layer and the filter layer.

[0020] Secondly, this application provides a display device.

[0021] The display device provided in this application includes the display panel described in any of the above embodiments.

[0022] It is understandable that the beneficial effects of the second aspect mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the display panel provided in an embodiment of this application;

[0025] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0026] Figure 3 The display panel provided in Embodiment 1 of this application is in Figure 2 Schematic diagram of the cross section at point BB;

[0027] Figure 4 The display panel provided in Embodiment 2 of this application is in Figure 2 Schematic diagram of the cross section at point BB;

[0028] Figure 5 The display panel provided in Embodiment 3 of this application is in Figure 2 Schematic diagram of the cross section at point BB;

[0029] Figure 6 The display panel provided in Embodiment 4 of this application is in Figure 2 Schematic diagram of the cross section at point BB;

[0030] Figure 7 The display panel provided in Embodiment 5 of this application is in Figure 2 Schematic diagram of cross-section at point BB.

[0031] The following are the labeling elements in the figure:

[0032] 100. Display panel;

[0033] 10. Array substrate; 11. Substrate; 12. Pixel circuit; 13. Planarization layer;

[0034] 20. Emitting layer; 21. Display pixel; 21a. First pixel; 21b. Second pixel; 21c. Third pixel; 22. Interference pixel; 23. Pixel definition layer; 201. Anode layer; 202. Organic light-emitting material; 203. Cathode layer;

[0035] 30. Filter layer; 31. Transmitting part; 32. Second light-absorbing part; 33. First light-absorbing part; 34. Interference filter part; 35. First electrode layer; 36. Second electrode layer; 37. Light-shielding part;

[0036] 41. First inorganic encapsulation layer; 42. Organic encapsulation layer; 43. Second inorganic encapsulation layer. Detailed Implementation

[0037] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0038] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0039] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0041] A solar-powered display panel integrates image display and solar power generation. Under sunlight, it generates directional current for the display panel to use or store in a battery. A privacy-protected display panel prevents the user from viewing the correct image outside of the viewing angle 'a'. However, display panels in related technologies are not compatible with both solar power generation and privacy protection functions.

[0042] To address the aforementioned technical problems, embodiments of this application provide a display panel and a display device using the display panel. The display panel provided in this application embodiment can be any one of an Organic Light-Emitting Diode (OLED) display panel, a Light Emitting Diode (LED) display panel, a Mini Light Emitting Diode (MiniLED) display panel, or a Micro Light Emitting Diode (μLED) display panel. The display panel provided in this application embodiment absorbs light emitted by interfering pixels toward the viewing angle α by arranging photoelectric materials in the filter layer, thus achieving both power generation and privacy protection functions.

[0043] Please refer to the following: Figure 1 and Figure 2 The display panel 100 provided in this application will be described in conjunction with an embodiment where the display panel 100 is an OLED display panel 100.

[0044] The display panel 100 provided in this application embodiment includes an array substrate 10, a light-emitting layer 20, and a light-filtering layer 30 stacked along a first direction z.

[0045] In some embodiments, the array substrate 10 includes a substrate 11, a pixel circuit 12, and a planarization layer 13.

[0046] In some embodiments, the substrate 11 is made of at least one of hard materials such as resin, ceramic, glass, or metal.

[0047] In some other embodiments, the substrate 11 is made of at least one flexible material such as polyimide (PI) or polyester (PET).

[0048] The light-emitting layer 20 includes a plurality of display pixels 21 and a plurality of interference pixels 22 arranged at intervals. The interference pixels 22 are used to generate emitted light of a set color.

[0049] like Figure 2 As shown, the display pixel 21 includes alternating first pixel 21a, second pixel 21b and third pixel 21c. The first pixel 21a is used to generate red light, the second pixel 21b is used to generate green light and the third pixel 21c is used to generate blue light. By adjusting the brightness ratio of red, green and blue (such as additive color mixing), almost all colors visible to the human eye can be synthesized to achieve full-color display.

[0050] Interference pixels 22 and display pixels 21 are arranged alternately. Interference pixels 22 are used to generate any one of red light, green light, or blue light, so as to interfere with the image displayed by display pixels 21 through the light generated by interference pixels 22.

[0051] In some embodiments, the interference pixels 22 are arranged in a one-to-one correspondence with the display pixels 21; in other embodiments, the interference pixels 22 are arranged in a corresponding manner with a plurality of display pixels 21.

[0052] In some embodiments, such as Figure 3 As shown, the array substrate 10 includes a pixel circuit 12. The display pixel 21 and the interference pixel 22 each include an anode layer 201, an organic light-emitting layer and a cathode layer 203 stacked in a direction away from the array substrate 10. The anode layer 201 is connected to the pixel circuit 12 in the array substrate 10. The organic light-emitting layer is connected between the anode layer 201 and the cathode layer 203. After a voltage is applied between the anode layer 201 and the cathode layer 203, an electric field is formed from the anode layer 201 to the cathode layer 203, which drives the carriers in the organic light-emitting layer to migrate in a directional manner, so that the organic light-emitting layer emits light.

[0053] like Figure 3 As shown, the filter layer 30 includes a first light-absorbing part 33, which can absorb photons to generate a photoelectric effect. In the first direction z, the first light-absorbing part 33 covers the light-emitting side of the display pixel 21 and covers the light-emitting side of the interference pixel 22.

[0054] The first light-absorbing part 33 is arranged in a one-to-one correspondence with the interference pixel 22. On the one hand, the first light-absorbing part 33 can absorb the light from the interference pixel 22 within the viewing angle a. On the other hand, the first light-absorbing part 33 can absorb the light that shines on the surface of the first light-absorbing part 33 from the side of the filter layer 30 away from the array substrate 10. The first light-absorbing part 33 contains a photoelectric conversion material, so that the first light-absorbing part 33 can convert light energy into electrical energy through the photovoltaic effect, thereby generating an electric field along the first direction z in the first light-absorbing part 33.

[0055] Therefore, on the one hand, the first light-absorbing part 33 absorbs the interference pixel 22 towards Figure 3 The interference light emitted within the viewing angle a shown in the figure allows the user to observe the interference light emitted by the interference pixel 22 only from outside the viewing angle a. On the other hand, the power generation function can be realized through the first light-absorbing part 33.

[0056] The beneficial effects of the display panel 100 provided in this application embodiment are as follows: Compared with the prior art, the interference pixel 22 of the display panel 100 provided in this application embodiment is used to display interference image information. The first light-absorbing part 33 covers the light-emitting side of the interference pixel 22, preventing the light emitted by the interference pixel 22 from entering the viewing angle a, so that the light emitted by the interference pixel 22 can only illuminate outside the viewing angle a, so that the display panel 100 provided in this application embodiment has a privacy function. The first light-absorbing part 33 can generate photocurrent under illumination, so that the display panel 100 provided in this application embodiment has the function of generating electricity. In summary, the display panel 100 provided in this application embodiment has both power generation function and privacy function.

[0057] In some embodiments provided in this application, such as Figure 2 and Figure 3 As shown, the display panel 100 also includes a first electrode layer 35 and a second electrode layer 36. The first electrode layer 35 and the second electrode layer 36 are respectively disposed on both sides of the first light-absorbing part 33 in the first direction z, and both the first electrode layer 35 and the second electrode layer 36 are electrically connected to the first light-absorbing part 33.

[0058] The first light-absorbing part 33 includes an electron transport layer, a light absorption layer (not shown in the figure), and a hole transport layer (not shown in the figure) arranged sequentially from the first electrode layer 35 to the second electrode layer 36. The light transmittance of the first electrode layer 35 and the light transmittance of the second electrode layer 36 are both greater than or equal to 80%, and the first electrode layer 35 and the second electrode layer 36 are colorless, transparent, and conductive materials.

[0059] In some embodiments, such as Figure 2 As shown, the orthographic projection of at least one of the first electrode layer 35 and the second electrode layer 36 in the first direction z is misaligned with the orthographic projection of the display pixel 21 in the first direction z, and the orthographic projection of the first light-absorbing part 33 in the first direction z is located within the orthographic projection of at least one of the first electrode layer 35 and the second electrode layer 36 in the first direction z.

[0060] In some embodiments, the material of the first electrode layer 35 and / or the second electrode layer 36 includes at least one of indium tin oxide (ITO), fluorine-doped tin oxide (FTO), indium zinc oxide (IZO), silver (Ag), and copper (Cu).

[0061] In some embodiments, the first electrode layer 35 and / or the second electrode layer 36 include a first indium tin oxide layer, a metal layer, and a second indium tin oxide layer stacked sequentially, wherein the metal layer includes silver (Ag) or copper (Cu), and the thickness of the metal layer in the first direction z is less than 10 nm.

[0062] In some embodiments, the thickness of the first electrode layer 35 and / or the second electrode layer 36 in the first direction z is greater than or equal to 30 nm, and the thickness of the first electrode layer 35 and / or the second electrode layer 36 in the first direction z is less than or equal to 90 nm.

[0063] In some embodiments, the light-absorbing layer includes at least one of monocrystalline silicon, polycrystalline silicon, amorphous silicon, gallium arsenide (GaAs), cadmium tellurium (CdTe), copper indium gallium selenide (CuIn(Ga)Se), organic-inorganic hybrid perovskite, semiconductor quantum dot, and narrow bandgap semiconductor oxide.

[0064] In some embodiments, the wavelength corresponding to the absorption peak of the light absorption layer is located within the wavelength range of the interference light generated by the interference pixel 22.

[0065] In some embodiments, the interfering pixel 22 is used to generate green light, and the light-absorbing layer comprises a methylammonium lead tribromide (MAPbBr3) based perovskite material.

[0066] In some embodiments, the material of the electron transport layer includes at least one of titanium dioxide (TiO2), zinc oxide (ZnO), tin oxide (SnO2), and fullerene (C60).

[0067] In some embodiments, the material of the hole transport layer includes nickel oxide (NiO). x At least one of 2,2′,7,7′-tetratetra(N,N-di-p-methoxyphenylamine)9,9′-spirodifluorene (Spiro-OMeTAD) and poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA).

[0068] In some embodiments, the thickness of the electron transport layer and / or hole transport layer in the first direction z is 50 nm to 300 nm.

[0069] In some embodiments provided in this application, the display panel 100 includes a display area and a non-display area. Multiple display pixels 21 and multiple interfering pixels 22 are disposed in the display area. The display panel 100 also includes a power storage unit disposed in the non-display area. The first electrode layer 35 and the second electrode layer 36 are both electrically connected to the power storage unit. Thus, the power storage unit stores the electrical energy generated by the first light-absorbing portion 33.

[0070] In some embodiments provided in this application, a portion of the first light-absorbing portion 33 is arranged concave to the array substrate 10.

[0071] like Figure 4 As shown, for a single first light-absorbing portion 33, the edge of the first light-absorbing portion 33 is located on the side of the middle of the first light-absorbing portion 33 away from the array substrate 10 in the first direction z, so that the middle of the first light-absorbing portion 33 is arranged concave towards the array substrate 10 relative to the edge of the first light-absorbing portion 33.

[0072] Therefore, when the direction in which light enters the first light-absorbing part 33 forms an angle with the first direction z, the light-absorbing area of ​​the first light-absorbing part 33 is increased, thereby improving the power generation efficiency of the first light-absorbing part 33.

[0073] In some embodiments provided in this application, such as Figure 3 As shown, the light-emitting layer 20 includes a pixel definition layer 23 with an opening. Multiple display pixels 21 and multiple interference pixels 22 each include an anode layer 201, an organic light-emitting layer and a cathode layer 203 stacked in a direction away from the array substrate 10. The anode layer 201 is disposed on one side of the pixel definition layer 23 facing the array substrate and is exposed in the opening. The organic light-emitting layer is disposed in the opening and connected to the anode layer 201. The cathode layer 203 is connected to the organic light-emitting layer.

[0074] Therefore, after the pixel circuit 12 in the array substrate 10 applies a voltage between the anode layer 201 and the cathode layer 203, an electric field is formed from the anode layer 201 to the cathode layer 203, which drives the carriers in the organic light-emitting layer to migrate in a directional manner, so that the organic light-emitting layer emits light.

[0075] The filter layer 30 also includes a second light-absorbing part 32, the orthographic projection of the second light-absorbing part 32 in the first direction z is misaligned with the orthographic projection of the display pixel 21 in the first direction z, and the orthographic projection of the second light-absorbing part 32 in the first direction z is misaligned with the orthographic projection of the interference pixel 22 in the first direction z.

[0076] like Figure 3As shown, the light transmittance of the second light-absorbing part 32 is less than or equal to 50%. The second light-absorbing part 32 is staggered from both the display pixel 21 and the interference pixel 22, so that the position of the second light-absorbing part 32 in the first direction z is between two adjacent display pixels 21 or between the display pixel 21 and its adjacent interference pixel 22. On the one hand, the second light-absorbing part 32 isolates the sub-pixels and avoids color mixing; on the other hand, the second light-absorbing part 32 blocks light leakage and improves the contrast.

[0077] In some embodiments provided in this application, the second light-absorbing part 32 includes a photoelectric conversion material, the second light-absorbing part 32 is capable of absorbing photons to generate a photoelectric effect, and the second light-absorbing part 32 is connected between the first electrode layer 35 and the second electrode layer 36.

[0078] In some embodiments, the material of the second light-absorbing part 32 includes at least one of monocrystalline silicon, polycrystalline silicon, amorphous silicon, gallium arsenide (GaAs), cadmium telluride (CdTe), copper indium gallium selenide (CuIn(Ga)Se), organic-inorganic hybrid perovskite, semiconductor quantum dot, and narrow bandgap semiconductor oxide, so that the second light-absorbing part 32 can convert light energy into electrical energy through the photovoltaic effect, thereby generating a directional electric field along the first direction z in the second light-absorbing part 32. The second light-absorbing part 32 is connected to both the first electrode layer 35 and the second electrode layer 36, so that the electrical energy generated by the second light-absorbing part 32 forms a directional current in the first electrode layer 35 and the second electrode layer 36.

[0079] In some embodiments provided in this application, a portion of the second light-absorbing portion 32 is arranged concave to the array substrate 10.

[0080] like Figure 5 As shown, for a single light-shielding portion in the second light-absorbing portion 32, the edge of the light-shielding portion is located on the side of the center of the light-shielding portion away from the array substrate 10 in the first direction z, so that the center of the light-shielding portion is arranged concave towards the array substrate 10 relative to the edge of the light-shielding portion.

[0081] Therefore, when there is an angle between the direction of light incident on the shading part and the first direction z, the light absorption area of ​​the shading part is increased, and the power generation efficiency of the shading part is improved.

[0082] In some embodiments provided in this application, the transmittance of the first light-absorbing part 33 in the first direction z is less than or equal to 20% for the light emitted by the interfering pixel 22.

[0083] The transmittance of the first light-absorbing part 33 in the first direction z is any value less than or equal to 20%.

[0084] In some embodiments, the transmittance of the first light-absorbing portion 33 in the first direction z can be any one of 0, 1%, 2.5%, 15%, or 20%.

[0085] In some embodiments, the transmittance of the first light-absorbing portion 33 is less than or equal to 20% in the entire visible light spectrum.

[0086] In some embodiments provided in this application, such as Figure 7 As shown, the filter layer 30 includes a light-shielding part 37, which is located on the side of the first light-absorbing part 33 that is away from the interfering pixel 22 in the first direction z. In the first direction z, the light-shielding part 37 covers the light-emitting side of the interfering pixel 22.

[0087] The color of the light-shielding part 37 is different from the color of the light emitted by the interfering pixel 22.

[0088] As shown in the figure, the orthographic projection of the interference pixel 22 in the first direction z is located within the outline of the orthographic projection of the filter layer 30 in the first direction z, or the outline of the orthographic projection of the interference pixel 22 in the first direction z coincides with the outline of the orthographic projection of the filter layer 30 in the first direction z.

[0089] Therefore, the light-shielding part 37 can absorb the light emitted by the interfering pixel 22, thereby reducing the intensity of the light emitted by the interfering pixel 22 into the viewing angle a, and preventing the light emitted by the interfering pixel 22 from affecting the display effect of the display panel.

[0090] In some embodiments, the color of the light-shielding part 37 is complementary to the color of the light emitted by the interference pixel 22. For example, if the interference pixel 22 emits green light, the light-shielding part 37 is made of red transparent material, so that the light emitted by the interference pixel 22 into the viewing angle a can be completely absorbed by the light-shielding part 37.

[0091] In some embodiments provided in this application, such as Figure 3 As shown, the filter layer 30 also includes a plurality of interference filter sections 34. The transmittance of the interference filter section 34 is greater than that of the first light-absorbing section 33. In the first direction z, the interference filter section 34 covers the light-emitting side of the interference pixel 22. The outer contour of the orthographic projection of the first light-absorbing section 33 in the first direction z is located inside the outer contour of the orthographic projection of the interference filter section 34 in the first direction z.

[0092] like Figure 3 As shown, the orthographic projection of the interference pixel 22 in the first direction z is located within the orthographic projection of the interference filter 34 in the first direction z. When the interference light generated by the interference pixel 22 is transmitted from the outer periphery of the corresponding first light-absorbing part 33, the interference light generated by the interference pixel 22 is transmitted through the interference filter 34. The color of the interference filter 34 is the same as the color of the interference light, ensuring that each interference pixel 22 only outputs pure color light, avoiding color mixing and improving contrast.

[0093] like Figure 5As shown, the interference filter section 34 is arranged around the first light-absorbing section 33;

[0094] like Figure 3 As shown, a portion of the interference filter 34 is arranged around the first light-absorbing portion 33, and another portion of the interference filter 34 covers the side of the first light-absorbing portion 33 that is away from the array substrate 10 in the first direction z.

[0095] In some embodiments provided in this application, such as Figure 3 As shown, the interference filter 34 includes a photoelectric conversion material. The interference filter 34 can absorb photons to generate a photoelectric effect. The interference filter 34 is connected between the first electrode layer 35 and the second electrode layer 36.

[0096] As shown in the figure, the material of the interference filter 34 includes at least one of monocrystalline silicon, polycrystalline silicon, amorphous silicon, gallium arsenide (GaAs), cadmium telluride (CdTe), copper indium gallium selenide (CuIn(Ga)Se), organic-inorganic hybrid perovskite, semiconductor quantum dot, and narrow bandgap semiconductor oxide, so that the interference filter 34 can convert light energy into electrical energy through the photovoltaic effect, thereby generating a directional electric field along the first direction z in the interference filter 34. The interference filter 34 is connected to both the first electrode layer 35 and the second electrode layer 36, so that the electrical energy generated by the interference filter 34 forms a directional current between the first electrode layer 35 and the second electrode layer 36, so that the interference filter 34 also has the power generation capacity, thereby improving the power generation efficiency of the display panel 100 provided in this embodiment.

[0097] In some embodiments provided in this application, the filter layer 30 further includes a light-transmitting portion 31, the light transmittance of the light-transmitting portion 31 being greater than the light transmittance of the first light-absorbing portion 33, such as... Figure 3 As shown, there are multiple light-transmitting parts 31, and each light-transmitting part 31 is arranged in a one-to-one correspondence with a display pixel 21. The light transmittance of the light-transmitting part 31 is greater than or equal to 80%. The color of the light-transmitting part 31 is the same as the color of the light generated by its corresponding display pixel 21, ensuring that each display pixel 21 outputs only pure color light, avoiding color mixing, thereby combining to form an accurate full-color image.

[0098] In some embodiments provided in this application, such as Figure 5 As shown, the filter layer 30 is integrally formed, the thickness of the light-transmitting part 31 in the first direction z is smaller than the thickness of the first light-absorbing part 33 in the first direction z, and the thickness of the interference filter part 34 in the first direction z is smaller than the thickness of the first light-absorbing part 33 in the first direction z.

[0099] The thickness of the light-transmitting part 31 in the first direction z is smaller than the thickness of the second light-absorbing part 32 in the first direction z, and the thickness of the interference filtering part 34 in the first direction z is smaller than the thickness of the second light-absorbing part 32 in the first direction z.

[0100] like Figure 5 As shown, the light-transmitting part 31, the first light-absorbing part 33, the second light-absorbing part 32, and the interference filter part 34 are made of the same material, and the materials of the light-transmitting part 31, the first light-absorbing part 33, the second light-absorbing part 32, and the interference filter part 34 all include at least one of monocrystalline silicon, polycrystalline silicon, amorphous silicon, gallium arsenide (GaAs), cadmium tellurium (CdTe), copper indium gallium selenide (CuIn(Ga)Se), organic-inorganic hybrid perovskite, semiconductor quantum dot, and narrow bandgap semiconductor oxide, so that the light-transmitting part 31, the first light-absorbing part 33, the second light-absorbing part 32, and the interference filter part 34 can all generate electricity through the photoelectric effect, that is, the entire filter layer 30 can generate electricity, thereby improving the power generation efficiency of the display panel 100 provided in this application embodiment.

[0101] In some embodiments, the material of the filter layer 30 includes α-phase FAPbI3 (formamidinium lead triiodide), the thickness of the second light-absorbing part 32 and the thickness of the first light-absorbing part 33 are greater than 500 nm, and the thickness of the light-transmitting part 31 and the thickness of the interference filter part 34 are less than 150 nm.

[0102] The thickness of the light-transmitting part 31 is small, while the thickness of the second light-absorbing part 32 and the first light-absorbing part 33 is large. This makes the light transmittance of the filter layer 30 greater than that of the second light-absorbing part 32 and the first light-absorbing part 33. Most of the light emitted by the display pixel 21 can pass through the light-transmitting part 31, and most of the light emitted by the interference pixel 22 can pass through the interference filter 34. The light emitted by the display pixel 21 is blocked by the second light-absorbing part 32, and the light emitted by the interference pixel 22 into the viewing angle a is blocked by the first light-absorbing part 33.

[0103] Therefore, the light-transmitting part 31, the first light-absorbing part 33, the second light-absorbing part 32, and the interference filter part 34 are made of the same material and are integrally formed, which simplifies the film structure of the filter layer 30 and the preparation process of the filter layer 30.

[0104] The processing method for the display panel 100 provided in this application embodiment includes:

[0105] Provide array substrate 10;

[0106] A light-emitting layer 20 is processed on the surface of the array substrate 10 in the first direction z;

[0107] A first inorganic encapsulation layer 41 and an organic encapsulation layer 42 are sequentially processed on the surface of the light-emitting layer 20 facing away from the array substrate 10.

[0108] Multiple first grooves and multiple second grooves are processed on the surface of the organic encapsulation layer 42 facing away from the array substrate 10;

[0109] The light-shielding part of the second light-absorbing part 32 is processed in the first groove, and the first light-absorbing part 33 is processed in the second groove.

[0110] In some embodiments provided in this application, such as Figures 3 to 6 As shown, the light-emitting layer 20 has a first inorganic encapsulation layer 41, an organic encapsulation layer 42, and a second inorganic encapsulation layer 43 stacked along the first direction z on the side facing away from the array substrate 10. The first inorganic encapsulation layer 41 covers the surface of the light-emitting layer 20 facing away from the array substrate 10, and the organic encapsulation layer 42 covers the surface of the first inorganic encapsulation layer 41 facing away from the array substrate 10.

[0111] The first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43 are both made of at least one of silicon nitride (SiN) and aluminum oxide (AlO), and are processed by chemical vapor deposition (CVD) to give the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43 extremely low water and oxygen permeability. The first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43 prevent water and oxygen in the external environment from directly corroding the organic light-emitting material 202, avoid defects such as dark spots and black spots, and extend the device life.

[0112] The organic encapsulation layer 42 is made of at least one of polyimide (PI) and epoxy resin, and is processed by inkjet printing or spin coating to cover the surface of the first inorganic encapsulation layer 41 facing away from the array substrate 10. On the one hand, the organic encapsulation layer 42 buffers the difference in thermal expansion coefficients between the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43, preventing the encapsulation layer from cracking due to stress concentration; on the other hand, by setting the organic encapsulation layer 42 between the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43, the tortuosity of the water and oxygen permeation path in the external environment is increased, further reducing the water and oxygen transport efficiency.

[0113] In some embodiments, such as Figure 5 As shown, the filter layer 30 is located between the organic encapsulation layer 42 and the second inorganic encapsulation layer 43.

[0114] Thus, the second inorganic encapsulation layer 43 covers the surface of the filter layer 30, protecting the photoelectric conversion material in the filter layer 30 and preventing the light-transmitting part 31, the first light-absorbing part 33, the second light-absorbing part 32, and the interference filter part 34 in the filter layer 30 from being corroded by water and oxygen.

[0115] In other embodiments, such as Figure 6 As shown, the second inorganic encapsulation layer 43 is located between the organic encapsulation layer 42 and the filter layer 30.

[0116] Therefore, on the one hand, defects in the preparation process of the filter layer 30 can be avoided to prevent poor encapsulation, and on the other hand, the distance between the filter layer 30 and the light-emitting layer 20 in the first direction z can be increased, so that the first light-absorbing part 33 and the second light-absorbing part 32 can be designed to be larger, which is more conducive to the production and preparation of the filter layer 30.

[0117] Secondly, this application provides a display device.

[0118] The display device provided in this application includes the display panel 100 in any of the above embodiments.

[0119] The display device provided in this application embodiment can be any of the following devices with display functions: smartphone, smartwatch, tablet, laptop, monitor, vehicle display, etc. The display panel 100 provided in this application embodiment has the advantage of combining power generation and privacy protection functions, thus enabling the display device provided in this application embodiment to simultaneously perform solar power generation and privacy display functions.

[0120] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized by, include: Array substrate; A light-emitting layer is disposed on one side of the array substrate in a first direction; the light-emitting layer includes a plurality of display pixels and a plurality of interference pixels arranged at intervals, the interference pixels being used to generate emitted light of a set color; A filter layer is disposed on the side of the light-emitting layer away from the array substrate. The filter layer includes a first light-absorbing portion, which is capable of absorbing photons to generate a photoelectric effect. In a first direction, the first light-absorbing portion covers the light-emitting side of the interfering pixel. The light-emitting layer includes a pixel definition layer with an opening. Each of the plurality of display pixels and the plurality of interference pixels includes an anode layer, an organic light-emitting layer and a cathode layer stacked in a direction away from the array substrate. The anode layer is disposed on the side of the pixel definition layer facing the array substrate and is exposed in the opening. The organic light-emitting layer is disposed in the opening and connected to the anode layer. The cathode layer is connected to the organic light-emitting layer. The filter layer further includes a second light-absorbing portion, which is capable of absorbing photons to generate a photoelectric effect. In the first direction, the second light-absorbing portion covers at least a portion of the pixel definition layer. The filter layer further includes multiple interference filter sections, the transmittance of which is greater than that of the first light-absorbing section. In the first direction, the interference filter section covers the light-emitting side of the interference pixel, and the outer contour of the orthographic projection of the first light-absorbing section in the first direction is located inside the outer contour of the orthographic projection of the interference filter section in the first direction.

2. The display panel of claim 1, wherein: The display panel further includes a first electrode layer and a second electrode layer, which are respectively disposed on both sides of the first light-absorbing part in the first direction, and both the first electrode layer and the second electrode layer are electrically connected to the first light-absorbing part. The display panel includes a display area and a non-display area. A plurality of display pixels and a plurality of interference pixels are disposed in the display area. The display panel also includes a power storage unit disposed in the non-display area. The first electrode layer and the second electrode layer are both electrically connected to the power storage unit.

3. The display panel of claim 1, wherein: The first light-absorbing portion is partially recessed towards the array substrate.

4. The display panel as described in claim 1, characterized in that: For the light emitted by the interfering pixel, the transmittance of the first light-absorbing part in the first direction is less than or equal to 20%.

5. The display panel as described in claim 1, characterized in that: The filter layer includes a light-shielding portion, which is located on the side of the first light-absorbing portion that is away from the interfering pixel in the first direction. In the first direction, the light-shielding portion covers the light-emitting side of the interfering pixel. The color of the light-shielding part is different from the color of the light emitted by the interfering pixel.

6. The display panel as described in claim 1, characterized in that: The filter layer further includes a light-transmitting portion, which covers the light-emitting side of the display pixel, and the light transmittance of the light-transmitting portion is greater than the light transmittance of the first light-absorbing portion; The light-transmitting part includes a photoelectric conversion material, and the light-transmitting part is capable of absorbing photons to generate a photoelectric effect.

7. The display panel as described in claim 6, characterized in that: The filter layer is integrally formed, and the thickness of the light-transmitting part in the first direction is smaller than the thickness of the first light-absorbing part in the first direction.

8. The display panel as described in any one of claims 1-7, characterized in that: The light-emitting layer has a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked along the first direction on the side opposite to the array substrate. The first inorganic encapsulation layer covers the surface of the light-emitting layer on the side opposite to the array substrate, and the organic encapsulation layer covers the surface of the first inorganic encapsulation layer on the side opposite to the array substrate. The filter layer is located between the organic encapsulation layer and the second inorganic encapsulation layer, or the second inorganic encapsulation layer is located between the organic encapsulation layer and the filter layer.

9. A display device, characterized in that, Includes the display panel as described in any one of claims 1-8.

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