Display panel and electronic equipment

Abstract

The invention provides a display panel and electronic equipment. The display panel comprises a substrate and a dimming layer, a first pixel, a second pixel and a third pixel are arranged on the substrate; the dimming layer comprises a first dimming layer and a second dimming layer, and the first dimming layer is provided with a hollow area opposite to the sub-pixels; the hollow-out areas comprise a first hollow-out area, a second hollow-out area and a third hollow-out area; a first interval is formed between the edge of a first projection, projected on the substrate, of the first hollow-out area and the first pixel, a second interval is formed between the edge of a second projection, projected on the substrate, of the second hollow-out area and the second pixel, and a third interval is formed between the edge of a third projection, projected on the substrate, of the third hollow-out area and the third pixel; the first interval is smaller than the second interval, and the second interval is smaller than the third interval. According to the display panel, the first interval is set to be smaller than the second interval, the second interval is set to be smaller than the third interval, and the large-view-angle color cast problem of the display panel can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic device structures, and in particular to a display panel and an electronic device. Background Art

[0002] Organic Light-Emitting Diode (OLED) display panels have many advantages such as light weight, active light emission, fast response speed, large viewing angle, wide color gamut, high brightness and low power consumption. They have gradually become the third generation display technology after liquid crystal displays.

[0003] However, the light emitted by OLED is partially annihilated due to refraction, reflection and total reflection at the multi-layer interface inside the display panel, resulting in poor light extraction efficiency and display brightness. Summary of the invention

[0004] On the one hand, an embodiment of the present application provides a display panel, which includes: a substrate and a dimming layer; a plurality of sub-pixels are arranged on the substrate; the sub-pixels include a first pixel, a second pixel, and a third pixel, the coverage area of ​​the first pixel is larger than the coverage area of ​​the second pixel, and the coverage area of ​​the second pixel is larger than the coverage area of ​​the third pixel; the dimming layer is spaced apart from the substrate; the dimming layer includes a first dimming layer and a second dimming layer, and the refractive index of the first dimming layer is smaller than the refractive index of the second dimming layer; wherein the first dimming layer has a hollow area and a non-hollow area, and the hollow area is arranged opposite to the sub-pixel; the second dimming layer is filled in the hollow area and covers the surface of the non-hollow area away from the substrate ; The hollow area includes a first hollow area, a second hollow area, and a third hollow area; a first projection of the first hollow area projected onto the substrate covers a projection of the first pixel projected onto the substrate, a second projection of the second hollow area projected onto the substrate covers a projection of the second pixel projected onto the substrate, and a third projection of the third hollow area projected onto the substrate covers a projection of the third pixel projected onto the substrate; there is a first distance between the edge of the first projection and the first pixel; there is a second distance between the edge of the second projection and the second pixel; there is a third distance between the edge of the third projection and the third pixel; the first distance is smaller than the second distance, and the second distance is smaller than the third distance.

[0005] On the other hand, an embodiment of the present application further provides an electronic device, which includes a housing assembly and a display panel connected to one side of the housing assembly; wherein the display panel is the display panel described in the aforementioned embodiment.

[0006] The display panel and electronic device provided in the embodiments of the present application can converge the light emitted from the sub-pixels at a large angle to a small angle by setting a first dimming layer with a low refractive index and a second dimming layer with a high refractive index, thereby improving the light extraction efficiency of the display panel. Furthermore, according to the fact that the coverage area of ​​the first pixel is larger than the coverage area of ​​the second pixel, and the coverage area of ​​the second pixel is larger than the coverage area of ​​the third pixel, the first spacing is set to be smaller than the second spacing, and the second spacing is set to be smaller than the third spacing, that is, the spacing between the hollow area of ​​the first dimming layer and the sub-pixels of different colors is set differently, which can improve the color deviation problem of the display panel at large viewing angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0008] Figure 1 is a schematic diagram of the structure of an electronic device in some embodiments of the present application;

[0009] Figure 2 yes Figure 1 A schematic diagram of the structural disassembly of the electronic device in the embodiment;

[0010] Figure 3 is a schematic diagram of the front structure of a display panel in some embodiments of the present application;

[0011] Figure 4 yes Figure 3 A schematic diagram of a cross-sectional structure of a display panel along the AA direction in the embodiment;

[0012] Figure 5 is a schematic diagram of a cross-sectional structure of a display panel in some other embodiments of the present application;

[0013] Figure 6 is a schematic diagram of a cross-sectional structure of a display panel in some other embodiments of the present application;

[0014] Figure 7 is a schematic diagram of a light extraction efficiency variation curve of a display panel in some embodiments of the present application;

[0015] Figure 8 is a schematic diagram of a light extraction efficiency variation curve of a display panel in some embodiments of the present application;

[0016] Fig. 9 It is a schematic diagram of the structural composition of mobile terminal devices in other embodiments of the present application. DETAILED DESCRIPTION

[0017] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0018] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0019] As used herein, "electronic devices" (or simply "terminals") include, but are not limited to, devices configured to receive / send communication signals via a wireline connection (e.g., via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, a direct cable connection, and / or another data connection / network) and / or via a wireless interface (e.g., for a cellular network, a wireless local area network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and / or another communication terminal). Communication terminals configured to communicate via a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet / intranet access, web browsers, organizers, calendars, and / or global positioning system (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. A mobile phone is an electronic device equipped with a cellular communication module.

[0020] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the structure of an electronic device 100 in some embodiments of the present application, Figure 2 yes Figure 1 Schematic diagram of the structural disassembly of the electronic device 100 in the embodiment.

[0021] The electronic device 100 provided in the embodiment of the present application may specifically be a mobile phone, a tablet computer, a laptop computer, and the like. The following description is given below with the electronic device 100 being a mobile phone. The electronic device 100 may include a housing assembly 10 and a display panel 20 connected to one side of the housing assembly 10. The housing assembly 10 is connected to the display panel 20, and together they enclose a housing space for the electronic device 100. The housing space of the electronic device 100 may be used to install electronic devices required by the electronic device 100, such as a battery, a photosensitive device, a circuit board, and a camera.

[0022] Specifically, the housing assembly 10 may include a middle frame 110 and a cover plate 120. The display panel 20 may be connected to one side of the middle frame 110, and the cover plate 120 may be connected to the other opposite side of the middle frame 110, that is, the display panel 20 and the cover plate 120 may be respectively disposed on opposite sides of the middle frame 110, thereby forming a housing space for the electronic device 100 together with the middle frame 110.

[0023] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] like Figure 2 As shown, the middle frame 110 may include a middle plate 111 of an integral structure and a frame 112 surrounding at least part of the outer periphery of the middle plate 111, and the two may be integrally formed by injection molding, stamping molding, heat absorption molding and other processes. Among them, the frame 112 may be formed by the side wall of the middle plate 111 extending in the thickness direction of the middle plate 111, so that the two sides of the middle frame 110 that are relatively arranged can form corresponding open structures. The display panel 20 and the cover plate 120 may be respectively covered on the open structures on the opposite sides of the middle frame 110, thereby forming a housing space for the electronic device 100 together with the middle frame 110. In some embodiments, the middle plate 111 and the frame 112 may also be two independent structural members, and the two may be connected by one of the assembly methods such as snap-on, bonding and welding and a combination thereof. Alternatively, the middle frame 110 may also include only the frame 112.

[0025] In addition, the material of the middle frame 110 can be glass, metal, hard plastic, etc., so that the middle frame 110 has a certain structural strength. Among them, since the middle frame 110 is generally directly exposed to the external environment, the middle frame 110 can also have certain wear-resistant, corrosion-resistant and scratch-resistant properties, or a layer of functional materials for wear-resistant, corrosion-resistant and scratch-resistant is coated on the outer surface of the middle frame 110 (that is, the outer surface of the electronic device 100). In addition, in some embodiments, a corresponding brand logo (LOGO) can also be provided on the middle frame 110 to beautify the appearance of the electronic device 100 and improve brand recognition. Further, the middle frame 110 is arranged between the display panel 20 and the cover plate 120, and is respectively connected to the display panel 20 and the cover plate 120 to form the overall structural frame of the electronic device 100. In the structural application of the electronic device 100, the middle frame 110 is generally used to carry or fix the internal components such as the circuit board, battery, camera or photosensitive device of the electronic device 100.

[0026] See also Figure 3 and Figure 4 , Figure 3 is a schematic diagram of the front structure of the display panel 20 in some embodiments of the present application, Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of the display panel 20 along the AA direction in the embodiment. The display panel 20 can be used to provide an image display function for the electronic device 100, and the display panel 20 can be covered on one side of the middle frame 110, and the two can be bonded and fixed by adhesive.

[0027] Specifically, the display panel 20 may include a substrate 210, a plurality of sub-pixels 220 disposed on the substrate 210, and a dimming layer 250 spaced apart from the substrate 210. The substrate 210 may be provided with a plurality of sub-pixels 220, which are spaced apart, that is, there is a pixel gap between two adjacent sub-pixels 220. The dimming layer 250 is spaced apart from the substrate 210 in the light emitting direction of the sub-pixels 220, so that the light emitted by the sub-pixels 220 can pass through the dimming layer 250.

[0028] The sub-pixel 220 may include a first pixel 221, a second pixel 222, and a third pixel 223. The coverage area of ​​the first pixel 221 is larger than that of the second pixel 222, and the coverage area of ​​the second pixel 222 is larger than that of the third pixel 223.

[0029] Among them, the substrate 210 can be configured as a driving circuit for integrating the sub-pixel 220 to emit light, that is, the driving circuit can include a TFT (Thin Film Transistor) circuit. It can be understood that the TFT circuit is electrically connected to the sub-pixel 220, thereby driving the sub-pixel 220 to emit light. The source of the thin film field effect transistor is connected to the corresponding electrode of the sub-pixel 220. In other words, the source of the thin film field effect transistor and the corresponding electrode of the sub-pixel 220 are connected through the flat layer 220. Optionally, a flat layer (not shown in the figure) can be provided on the substrate 210, and the flat layer can provide a flattened bearing surface for the sub-pixel 220. The flat layer can be a single-layer structure or a multi-layer structure. The flat layer can be made of organic materials, such as: photoresist, acrylic polymer, silicon-based polymer and other materials. Among them, the sub-pixel 220 can be connected to the substrate 210 by opening a via (such as a metal via) on the flat layer.

[0030] It can be understood that the substrate 210 may include a base, a buffer layer disposed on the base, an active layer disposed on the buffer layer, a first gate insulating layer covering the active layer, a first gate disposed on the first gate insulating layer, a second gate insulating layer covering the first gate, a second gate disposed on the second gate insulating layer, an interlayer insulating layer covering the second gate, and a source and drain disposed on the interlayer insulating layer (not shown in the figure). Among them, the flat layer is disposed on the interlayer insulating layer and covers the source and drain. It should be noted that the above-mentioned technical features of the substrate 210 are within the scope of understanding of those skilled in the art, so this application will not be repeated. In some embodiments, the first gate insulating layer and the second gate insulating layer can be combined into one gate insulating layer, in which case the first gate and the second gate can be combined into one gate. In other words, in some embodiments, the substrate 210 may include a first gate insulating layer and a first gate disposed on the first gate insulating layer; or, the substrate may include a second gate insulating layer and a second gate disposed on the second gate insulating layer. It should be noted that the terms "first", "second", and "third" in this application are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] Furthermore, in the RGB display panel 20, the sub-pixels of the same color have the same size. In view of the different luminous efficiencies of the three color sub-pixels, the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B are set to have different sizes. Specifically, the blue sub-pixel B has the largest size, the red sub-pixel R has the smallest size, and the green sub-pixel G has a middle size, so as to achieve white balance. In other words, in the embodiment of the present application, the first pixel 221 can be a blue sub-pixel B, the second pixel 222 can be a green sub-pixel G, and the third pixel 223 can be a red sub-pixel R.

[0032] In one embodiment, the dimming layer 250 may include a first dimming layer 251 and a second dimming layer 252, and the refractive index of the first dimming layer 251 is less than the refractive index of the second dimming layer 252. The first dimming layer 251 has a hollow area 2511 and a non-hollow area 2512, and the hollow area 2511 is arranged opposite to the sub-pixel 220. The second dimming layer 252 is filled in the hollow area 2511 and covers the surface of the non-hollow area 2512 away from the substrate 210. It can be understood that by setting the first dimming layer 251 with a low refractive index and the second dimming layer 252 with a high refractive index, the light emitted from the sub-pixel at a large angle is converged to a small angle, thereby improving the light extraction efficiency of the display panel 20. It can be understood that by adjusting the relevant setting parameters of the first dimming layer 251 and the second dimming layer 252, the desired light convergence effect can be achieved, and different degrees of light convergence can be achieved.

[0033] The material of the first dimming layer 251 can be acrylic or silicone, and the material of the second dimming layer 252 can be ink mixed with a surface dispersant and doped particles, but is not limited thereto. The surface dispersant is at least one of sodium tripolyphosphate, sodium hexametaphosphate, sodium pyrophosphate and water glass. The doped particles are nanoparticles, such as ZrO2. The materials used in the first dimming layer 251 and the second dimming layer 252 are both materials with good light transmittance, and the refractive index can be adjusted by the material components in the material, which is convenient for the selection and use of different refractive indices.

[0034] Optionally, the refractive index of the first dimming layer 251 may be 1.30-1.55, for example, 1.35, 1.40, 1.45 or 1.50, etc. The refractive index of the second dimming layer 252 may be 1.55-2.00, for example, 1.60, 1.67, 1.70, 1.72, 1.75, 1.80, 1.85, 1.90 or 1.95, etc. It is understandable that those skilled in the art can flexibly set the refractive index of the first dimming layer 251 and the second dimming layer 252 according to actual needs.

[0035] In one embodiment, the hollow area 2511 may include a first hollow area 251a, a second hollow area 251b, and a third hollow area 251c. The orthographic projection of the first hollow area 251a projected on the substrate 210 is defined as the first projection, the orthographic projection of the second hollow area 251b projected on the substrate 210 is defined as the second projection, and the orthographic projection of the third hollow area 251c projected on the substrate 210 is defined as the third projection. The edge of the first projection surrounds the periphery of the first pixel 221, and has a first spacing J1 with the first pixel 221. The edge of the second projection surrounds the periphery of the second pixel 222, and has a second spacing J2 with the second pixel 222. The edge of the third projection surrounds the periphery of the third pixel 223, and has a third spacing J3 with the third pixel 223. In other words, the first projection covers the projection of the first pixel 221 projected on the substrate 210, the second projection covers the projection of the second pixel 222 projected on the substrate 210, and the third projection covers the projection of the third pixel 223 projected on the substrate 210.

[0036] The first spacing J1 is smaller than the second spacing J2, and the second spacing J2 is smaller than the third spacing J3.

[0037] Optionally, the first spacing J1 may be 0-3 microns, for example, 0.1 micron, 0.2 micron, 0.3 micron, 0.4 micron, 0.5 micron, 0.6 micron, 0.7 micron, 0.8 micron, 0.9 micron, 1.0 micron, 1.1 micron, 1.2 micron, 1.3 micron, 1.4 micron, 1.5 micron, 1.6 micron, 1.7 micron, 1.8 micron, 1.9 micron, 2.0 micron, 2.1 micron, 2.2 micron, 2.3 micron, 2.4 micron, 2.5 micron, 2.6 micron, 2.7 micron, 2.8 micron, 2.9 micron, or 3.0 micron, etc.

[0038] Optionally, the second spacing J2 can be 0-3.5 microns, for example, 0.1 micron, 0.2 micron, 0.3 micron, 0.4 micron, 0.5 micron, 0.6 micron, 0.7 micron, 0.8 micron, 0.9 micron, 1.0 micron, 1.1 micron, 1.2 micron, 1.3 micron, 1.4 micron, 1.5 micron, 1.6 micron, 1.7 micron, 1.8 micron, 1.9 micron, 2.0 micron, 2.1 micron, 2.2 micron, 2.3 micron, 2.4 micron, 2.5 micron, 2.6 micron, 2.7 micron, 2.8 micron, 2.9 micron, 3.0 micron, 3.1 micron, 3.2 micron, 3.3 micron, 3.4 micron, or 3.5 micron, etc.

[0039] Optionally, the third spacing J3 can be 0-4 microns, for example, 0.1 micron, 0.2 micron, 0.3 micron, 0.4 micron, 0.5 micron, 0.6 micron, 0.7 micron, 0.8 micron, 0.9 micron, 1.0 micron, 1.1 micron, 1.2 micron, 1.3 micron, 1.4 micron, 1.5 micron, 1.6 micron, 1.7 micron, 1.8 micron, 1.9 micron, 2.0 micron, 2.1 micron, 2.2 micron, 2.3 micron, 2.4 micron, 2.5 micron, 2.6 micron, 2.7 micron, 2.8 micron, 2.9 micron, 3.0 micron, 3.1 micron, 3.2 micron, 3.3 micron, 3.4 micron, 3.5 micron, 3.6 micron, 3.7 micron, 3.8 micron, 3.9 micron, or 4.0 micron, etc.

[0040] Furthermore, the light-adjusting layer 250 is provided on the light-emitting side of the display panel 20 to adjust the front-viewing angle light effect, wherein the front-viewing angle light effect refers to the light-emitting efficiency per unit area of ​​the display panel 20 in the normal direction of the plane where the display panel is located.

[0041] However, since the dimming layer 250 will converge the light emitted from the sub-pixel at a large angle to a small angle, the intensity of the emitted light at a large angle viewing angle is weak and color deviation occurs. The angle of the sub-pixel emitted light refers to the angle between the light and the normal of the plane where the display panel is located. The first projection is the projection of the first hollow area 251a on the substrate 210 in the normal direction of the plane where the display panel is located, the second projection is the projection of the second hollow area 251b on the substrate 210 in the normal direction of the plane where the display panel is located, and the third projection is the projection of the third hollow area 251c on the substrate 210 in the normal direction of the plane where the display panel is located. It should be noted that for a rigid and inflexible display panel 20, the plane where the display panel 20 is located is the light-emitting side surface of the display panel 20; for a flexible display panel 20, the plane where the display panel 20 is located is the light-emitting side surface of the display panel 20 when the display panel 20 is flattened. Based on this, the present application sets the coverage area of ​​the first pixel to be larger than the coverage area of ​​the second pixel, and the coverage area of ​​the second pixel to be larger than the coverage area of ​​the third pixel, so as to improve the service life of the sub-pixels of the display panel and achieve white balance. Furthermore, the present application sets the spacing between the hollow area of ​​the first dimming layer and the sub-pixels of different colors in the extension direction of the plane where the display panel is located differently, so as to improve the color deviation problem of the display panel at a large viewing angle.

[0042] In one embodiment, the sub-pixel 220 may include an anode 2201 disposed on the substrate 210, a cathode 2202 spaced apart from the anode 2201, and a light-emitting layer 2203 disposed between the anode 2201 and the cathode 2202. The anode 2201 of the sub-pixel 220 may be electrically connected to the substrate 210 through a metal via. The anode 2201 may be made of materials such as indium tin oxide, indium zinc oxide, or zinc oxide. The anode 2201 may be electrically connected to the source and drain of the substrate 210 through a metal via.

[0043] Furthermore, the display panel 20 further includes a pixel definition layer 240 disposed on the substrate 210. The pixel definition layer 240 has a plurality of pixel openings 240a distributed at intervals, and the pixel openings 240a are configured to limit the sub-pixels 220. The sub-pixels 220 include an anode 2201 at least partially disposed in the pixel openings 240a, a cathode 2202 spaced apart from the anode 2201, and a light-emitting layer 2203 disposed between the anode 2201 and the cathode 2202.

[0044] Specifically, the pixel definition layer 240 may be covered on the substrate 210, and may have a pixel opening 240a exposing at least part of the anode 2201, and the light-emitting layer 2203 may be located in the opening of the pixel definition layer 240 and formed on the anode 2201. The light-emitting layer 2203 may include a small molecule organic material or a polymer molecule organic material, and may be a fluorescent luminescent material or a phosphorescent luminescent material, and may emit red light, green light, blue light, or white light, etc.; and, according to different actual needs, in different examples, the light-emitting layer 2203 may further include an electron injection layer, an electron transport layer, a hole injection layer, a hole transport layer and other functional layers. The cathode 2202 covers the light-emitting layer 2203, and the material of the cathode 2202 includes but is not limited to one of alloys such as Mg / Ag, Ca / Al, Mg / MgAg, Gd / Al, Al / Li, Sn / Al and Ag / Al. Among them, the pixel definition layer 240 may be made of organic materials such as photoresist.

[0045] Of course, in some embodiments, the material of the pixel definition layer 240 may include silicon nitride, silicon oxide, or silicon oxynitride. It is understood that the display panel 20 may include a plurality of sub-pixels 220 distributed in an array. The anodes 2201 of each sub-pixel 220 are independent of each other, and the cathodes 2202 of each sub-pixel 220 may be connected over the entire surface to serve as a common electrode of the plurality of sub-pixels 220.

[0046] Furthermore, the pixel definition layer 240 may include a plurality of pixel openings 240a distributed in an array, and a non-opening area between adjacent pixel openings 240a. The anode 2201 is disposed on the substrate 210 and at least partially exposed in the pixel opening 240a of the pixel definition layer 240. The cathode 2202 may cover the pixel opening 240a and the non-opening area of ​​the pixel definition layer 240.

[0047] In one embodiment, the pixel opening 240a includes a first opening 2401, a second opening 2402, and a third opening 2403; the opening area of ​​the first opening 2401 is larger than the opening area of ​​the second opening 2402, and the opening area of ​​the second opening 2402 is larger than the opening area of ​​the third opening 2403. The first light-emitting layer 2203a of the first pixel 221 is disposed in the first opening 2401, the second light-emitting layer 2203b of the second pixel 222 is disposed in the second opening 2402, and the third light-emitting layer 2203c of the third pixel 223 is disposed in the third opening 2403. The first projection covers the projection of the first opening 2401 projected on the substrate 210, and the edge of the first projection surrounds the periphery of the first opening 2401; the first distance J1 is the distance between the edge of the first projection and the first opening 2401. The second projection covers the projection of the second opening 2402 projected on the substrate 210, and the edge of the second projection surrounds the periphery of the second opening 2402; the second distance J2 is the distance between the edge of the second projection and the second opening 2402. The third projection covers the projection of the third opening 2403 on the substrate 210 , and the edge of the third projection surrounds the periphery of the third opening 2403 ; the third distance J3 is the distance between the edge of the third projection and the third opening 2403 .

[0048] Specifically, the first light-emitting layer 2203a of the first pixel 221 is filled in the first opening 2401. At this time, the first spacing J1 can be equivalent to the spacing between the projection of the first opening 2401 on the plane where the display panel is located and the projection edge of the first hollow area 251a on the plane where the display panel is located. The second light-emitting layer 2203b of the second pixel 222 is filled in the second opening 2402. At this time, the second spacing J2 can be equivalent to the spacing between the projection of the second opening 2402 on the plane where the display panel is located and the projection edge of the second hollow area 251b on the plane where the display panel is located. The third light-emitting layer 2203c of the third pixel 223 is filled in the third opening 2403. At this time, the third spacing J3 can be equivalent to the spacing between the projection of the third opening 2403 on the plane where the display panel is located and the projection edge of the third hollow area 251c on the plane where the display panel is located.

[0049] Of course, in other embodiments, the first spacing J1 may be equivalent to the spacing between the projection of the first light-emitting layer 2203a on the plane where the display panel is located and the projection edge of the first hollow area 251a on the plane where the display panel is located. The second spacing J2 may be equivalent to the spacing between the projection of the second light-emitting layer 2203 on the plane where the display panel is located and the projection edge of the second hollow area 251b on the plane where the display panel is located. The third spacing J3 may be equivalent to the spacing between the projection of the third light-emitting layer 2203c on the plane where the display panel is located and the projection edge of the third hollow area 251c on the plane where the display panel is located.

[0050] In one embodiment, the display panel 20 further includes an encapsulation layer 260 disposed between the pixel definition layer 240 and the dimming layer 250, and the encapsulation layer 260 includes a first inorganic layer 261 and a second inorganic layer 262 that are stacked, and a buffer layer 263 disposed between the first inorganic layer 261 and the second inorganic layer 262. Specifically, the encapsulation layer 260 can be disposed on the side of the sub-pixel 220 that is away from the substrate 210, that is, the encapsulation layer 260 can be disposed on the cathode 2202 of the sub-pixel 220. The encapsulation layer 260 can be a thin film encapsulation (TFE) layer structure, including a first inorganic layer 261 and a second inorganic layer 262 that are alternately stacked, and a buffer layer 263 disposed between the first inorganic layer 261 and the second inorganic layer 262. The first inorganic layer 261 and the second inorganic layer 262 can be a stacked combination of one or more of a silicon oxide (SiOx) layer, a silicon nitride (SiNx) layer, and a silicon oxynitride (SiON) layer. The buffer layer 263 may be formed by inkjet printing, and the material thereof includes at least one of acrylic acid, hexamethyldisiloxane, acrylates, polycarbonates and polystyrene.

[0051] It is understood that the stacked structure of the encapsulation layer 260 is not limited to the above embodiment. For example, in other embodiments, the first inorganic layer 261 or the second inorganic layer 262 may be provided with one or more layers respectively; the buffer layer 263 is provided between two adjacent first inorganic layers 261, or the buffer layer 263 is provided between two adjacent second inorganic layers 262, or the buffer layer 263 is provided between adjacent first inorganic layers 261 and second inorganic layers 262.

[0052] Optionally, the first inorganic layer 261 is disposed on the cathode 2202 of the sub-pixel 220 , and the second inorganic layer 262 is disposed on a side of the first inorganic layer 261 away from the cathode 2202 .

[0053] In addition, in some embodiments, the buffer layer 263 can be formed by coating so that the thickness of the buffer layer 263 can be 2-8 microns. For example, the thickness of the buffer layer 263 can be 3 microns, 4 microns, 5 microns, 6 microns, or 7 microns. Among them, the material of the buffer layer 263 can be photoresist, and the photoresist can be coated. In the case of a thinner thickness, the flatness of the film layer can be ensured to be better, and the stress problem in the encapsulation layer 260 can be reduced. Of course, in other embodiments, the buffer layer 263 can also be made of transparent colloids such as transparent resins. It can be understood that by reducing the thickness of the buffer layer 263, the light attenuation at a large viewing angle can be further improved.

[0054] See also Figure 5 , Figure 5 2 is a schematic diagram of the cross-sectional structure of the display panel 20 in some other embodiments of the present application. In this embodiment, the pixel opening 240a includes a first opening 2401, a second opening 2402, and a third opening 2403. The first light-emitting layer 2203a of the first pixel 221 is arranged in the first opening 2401 and extends to the surface of the pixel definition layer 240 away from the substrate 210. The second light-emitting layer 2203b of the second pixel 222 is arranged in the second opening 2402 and extends to the surface of the pixel definition layer 240 away from the substrate 210. The third light-emitting layer 2203c of the third pixel 223 is arranged in the third opening 2403 and extends to the surface of the pixel definition layer 240 away from the substrate 210. Among them, the edge of the first projection surrounds the periphery of the first light-emitting layer 2203a; the first spacing J1 is the spacing between the edge of the first projection and the first light-emitting layer 2203a. The edge of the second projection surrounds the periphery of the second light-emitting layer 2203b; the second spacing J2 is the spacing between the edge of the second projection and the second light-emitting layer 2203b. The edge of the third projection surrounds the periphery of the third light-emitting layer 2203c; the third distance J3 is the distance between the edge of the third projection and the third light-emitting layer 2203c.

[0055] Specifically, the light-emitting layer 2203 of the sub-pixel 220 is not only located in the pixel opening 240a, but also extends to the surface of the pixel definition layer 240 away from the substrate 210, which can increase the light-emitting area of ​​the sub-pixel 220. Among them, the first light-emitting layer 2203a of the first pixel 221 is filled in the first opening 2401 and extends to the surface of the pixel definition layer 240 away from the substrate 210. At this time, the first spacing J1 can be equivalent to the distance between the projection of the first light-emitting layer 2203a on the plane where the display panel is located and the projection edge of the first hollow area 251a on the plane where the display panel is located. The second light-emitting layer 2203 of the second pixel 222 is filled in the second opening 2402 and extends to the surface of the pixel definition layer 240 away from the substrate 210. At this time, the second spacing J2 can be equivalent to the distance between the projection of the second light-emitting layer 2203b on the plane where the display panel is located and the projection edge of the second hollow area 251b on the plane where the display panel is located. The third light-emitting layer 2203c of the third pixel 223 fills the third opening 2403 and extends to the surface of the pixel definition layer 240 away from the substrate 210. At this time, the third distance J3 can be equivalent to the distance between the projection of the third light-emitting layer 2203c on the plane where the display panel is located and the projection edge of the third hollow area 251c on the plane where the display panel is located.

[0056] See also Figure 6 , Figure 6 2 is a schematic diagram of a cross-sectional structure of a display panel 20 in some other embodiments of the present application. In this embodiment, the display panel 20 further includes a touch layer 270 disposed between the encapsulation layer 260 and the dimming layer 250. The touch layer 270 may include a patterned touch electrode 271. The non-hollow area 2512 covers the touch electrode 271.

[0057] The touch layer 270 is disposed on the side of the encapsulation layer 260 away from the substrate 210, and is used to respond to the user's touch operation and convert the corresponding touch operation into an electrical signal and transmit it to the processor of the electronic device 100, so that the electronic device 100 can respond to the user's touch operation. The touch layer 270 can be electrically connected to the substrate 210, so that the touch layer 270 can respond to the user's touch operation and convert the corresponding touch operation into an electrical signal and transmit it to the processor of the electronic device 100, so that the electronic device 100 can respond to the user's touch operation.

[0058] The touch electrode 271 may include a plurality of first electrodes and a plurality of second electrodes interlaced with the plurality of first electrodes. The plurality of first electrodes and the plurality of second electrodes are interlaced to form a plurality of metal meshes, so that the touch electrode 271 can avoid the pixel opening 240a of the pixel definition layer 240 to avoid affecting the light emitting effect of the light emitting layer 2203.

[0059] It is understandable that the larger the line width of the touch electrode 271, the less conducive it is to improving the color shift phenomenon at a wide viewing angle, and if the line width of the touch electrode 271 is too small, color mixing may occur. Based on this, those skilled in the art can flexibly set the line width of the touch electrode 271 according to actual needs to match sub-pixels of different sizes, thereby improving the red or green shift phenomenon at a wide viewing angle.

[0060] In summary, the display panel and electronic device provided in the embodiments of the present application can improve the light extraction efficiency of the display panel by setting a first dimming layer with a low refractive index and a second dimming layer with a high refractive index, so as to converge the light emitted from the sub-pixel at a large angle to a small angle. Furthermore, according to the fact that the coverage area of ​​the first pixel is larger than the coverage area of ​​the second pixel, and the coverage area of ​​the second pixel is larger than the coverage area of ​​the third pixel, the first spacing is set to be smaller than the second spacing, and the second spacing is set to be smaller than the third spacing, that is, the spacing between the hollow area of ​​the first dimming layer and the sub-pixels of different colors is set differently, which can improve the color deviation problem of the display panel at a large viewing angle.

[0061] See also Figure 7 , Figure 7 2 is a schematic diagram of a light extraction efficiency variation curve of the display panel 20 in some embodiments of the present application, in which the vertical axis represents the light extraction efficiency improvement ratio, and the horizontal axis represents the horizontal spacing between the sub-pixel and the edge of the hollow region of the first adjustment layer (for example, the first spacing J1, the second spacing J2, or the third spacing J3). Figure 7 As shown, when the horizontal distance between the sub-pixel and the edge of the hollow region of the first adjustment layer is between 1-3 microns, the light efficiency is improved at a better rate, that is, the light efficiency can be improved by 6%-9%.

[0062] Take the sub-pixel R as an example. When the horizontal spacing is 1 micron, the light efficiency can be improved by 6.37%; when the horizontal spacing is 1.5 microns, the light efficiency can be improved by 8.92%; when the horizontal spacing is 2 microns, the light efficiency can be improved by 8.28%; when the horizontal spacing is 3 microns, the light efficiency can be improved by 6.37%. It can be understood that this embodiment only exemplifies the corresponding relationship between the light efficiency improvement ratio of the red sub-pixel R and the horizontal spacing, and the light efficiency improvement ratios of sub-pixels of other colors are similar.

[0063] Further, please refer to Table 1. After the above-mentioned horizontal spacing is optimized, the first spacing J1, the second spacing J2, and the third spacing J3 are adjusted differently to achieve the overall R / G / B brightness attenuation balance effect at each viewing angle, thereby reducing the color deviation problem of white light at a large viewing angle, and maintaining the uniformity of chromaticity and brightness from the same viewing angle.

[0064] Table 1: Simulation rules for optimizing sub-pixel light output efficiency and viewing angle change due to the difference in horizontal spacing between R / G / B sub-pixels:

[0065]

[0066] As can be seen from Table 1, when the horizontal spacing between sub-pixels of different colors and the edge of the hollow area is consistent, it can also have a better effect on the light output efficiency. However, due to the different enhancement ratios, the degree of brightness attenuation at a wide viewing angle is different, and it is difficult to maintain the uniformity of chromaticity and brightness at the same viewing angle. The present application differentiates the horizontal spacing between sub-pixels of different colors and the edge of the hollow area according to the different pixel opening ratios of sub-pixels of different colors, so that the substrate of the light output efficiency improvement effect of sub-pixels of different colors remains consistent, thereby making the degree of brightness attenuation at a wide viewing angle basically consistent, and the uniformity of chromaticity and brightness can be maintained at the same viewing angle.

[0067] See also Figure 8 , Figure 8 2 is a schematic diagram of a light output efficiency change curve of the display panel 20 in some embodiments of the present application. In the figure, the vertical axis represents the light output efficiency improvement ratio, and the horizontal axis represents the refractive index of the second dimming layer. As mentioned above, the refractive index of the first dimming layer 251 is lower than the refractive index of the second dimming layer 252. The refractive index of the first dimming layer 251 can be 1.30-1.55, and the refractive index of the second dimming layer 252 can be 1.55-2.00. Figure 8 In the embodiment, the refractive index of the first dimming layer is 1.45 as an example. When the refractive index of the second dimming layer is 1.5-1.9, the light extraction efficiency of the display panel is increased by more than 6%. Figure 8 It can be seen that when the refractive index of the first dimming layer is 1.45 and the refractive index of the second dimming layer is 1.67, the light extraction efficiency improvement efficiency of the display panel is at a peak value.

[0068] It can be understood that when the refractive index of the first dimming layer changes, the refractive index of the second dimming layer may change accordingly, so that the light extraction efficiency of the display panel is improved.

[0069] Furthermore, in some other embodiments of the present application, a mobile terminal device 900 is provided. Fig. 9 , Fig. 9It is a schematic diagram of the structure of a mobile terminal device in other embodiments of the present application. The mobile terminal device can be a mobile phone, a tablet computer, a laptop computer, a wearable device, etc. The mobile phone is used as an example in the diagram of this embodiment. The structure of the terminal device 900 may include an RF circuit 910, a memory 920, an input unit 930, a display unit 940 (i.e., the display panel 20 in the above embodiment), a sensor 950, an audio circuit 960, a wifi module 970, a processor 980, and a power supply 990. Among them, the RF circuit 910, the memory 920, the input unit 930, the display unit 940, the sensor 950, the audio circuit 960, and the wifi module 970 are respectively connected to the processor 980; the power supply 990 is used to provide power to the entire terminal device 900.

[0070] Specifically, the RF circuit 910 is used to receive and send signals; the memory 920 is used to store data instruction information; the input unit 930 is used to input information, which may specifically include a touch panel 931 and other input devices 932 such as operation buttons; the display unit 940 may include a display panel 941 (i.e., the display panel 20 in the above embodiment); the sensor 950 includes an infrared sensor, a laser sensor, etc., for detecting user approach signals, distance signals, etc.; the speaker 961 and the microphone (or microphone) 962 are connected to the processor 980 through the audio circuit 960 for receiving and sending sound signals; the wifi module 970 is used to receive and transmit wifi signals, and the processor 980 is used to process data information of the mobile terminal device. For the relevant technical features of the display module, please refer to the relevant description of the above display module embodiment, which will not be described in detail here.

[0071] It should be noted that the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0072] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: A substrate, wherein a plurality of sub-pixels are disposed on the substrate; the sub-pixels include a first pixel, a second pixel, and a third pixel, the coverage area of ​​the first pixel is larger than the coverage area of ​​the second pixel, and the coverage area of ​​the second pixel is larger than the coverage area of ​​the third pixel; and A dimming layer is spaced apart from the substrate; the dimming layer includes a first dimming layer and a second dimming layer, and the refractive index of the first dimming layer is less than the refractive index of the second dimming layer; The first dimming layer has a hollow area and a non-hollow area, and the hollow area is arranged opposite to the sub-pixel; the second dimming layer is filled in the hollow area and covers the surface of the non-hollow area away from the substrate; The hollow area includes a first hollow area, a second hollow area, and a third hollow area; a first projection of the first hollow area projected on the substrate covers a projection of the first pixel projected on the substrate, a second projection of the second hollow area projected on the substrate covers a projection of the second pixel projected on the substrate, and a third projection of the third hollow area projected on the substrate covers a projection of the third pixel projected on the substrate; There is a first distance between the edge of the first projection and the first pixel; there is a second distance between the edge of the second projection and the second pixel; there is a third distance between the edge of the third projection and the third pixel; the first distance is smaller than the second distance, and the second distance is smaller than the third distance.

2. The display panel according to claim 1, characterized in that: The display panel further comprises a pixel definition layer disposed on the substrate; the pixel definition layer has a plurality of pixel openings distributed at intervals, and the pixel openings are configured to limit the sub-pixels; The sub-pixel includes an anode at least partially disposed in the pixel opening, a cathode spaced apart from the anode, and a light-emitting layer disposed between the anode and the cathode.

3. The display panel according to claim 2, characterized in that: The pixel opening includes a first opening, a second opening, and a third opening; the opening area of ​​the first opening is larger than the opening area of ​​the second opening, and the opening area of ​​the second opening is larger than the opening area of ​​the third opening; The first light emitting layer of the first pixel is disposed in the first opening, the second light emitting layer of the second pixel is disposed in the second opening, and the third light emitting layer of the third pixel is disposed in the third opening; The edge of the first projection surrounds the periphery of the first opening; the first distance is the distance between the edge of the first projection and the first opening; The edge of the second projection surrounds the periphery of the second opening; the second distance is the distance between the edge of the second projection and the second opening; The edge of the third projection surrounds the periphery of the third opening; the third distance is the distance between the edge of the third projection and the third opening.

4. The display panel according to claim 2, characterized in that: The pixel opening includes a first opening, a second opening, and a third opening; the first light-emitting layer of the first pixel is arranged in the first opening and extends to the surface of the pixel definition layer away from the substrate, the second light-emitting layer of the second pixel is arranged in the second opening and extends to the surface of the pixel definition layer away from the substrate, and the third light-emitting layer of the third pixel is arranged in the third opening and extends to the surface of the pixel definition layer away from the substrate; The edge of the first projection surrounds the periphery of the first light-emitting layer; the first distance is the distance between the edge of the first projection and the first light-emitting layer; The edge of the second projection surrounds the periphery of the second light-emitting layer; the second distance is the distance between the edge of the second projection and the second light-emitting layer; The edge of the third projection surrounds the periphery of the third light-emitting layer; the third distance is the distance between the edge of the third projection and the third light-emitting layer.

5. The display panel according to claim 3 or 4, characterized in that: The first spacing is 0-3 microns, the second spacing is 0-3.5 microns, and the third spacing is 0-4 microns.

6. The display panel according to claim 5, characterized in that: The first spacing is 1.4 microns, the second spacing is 1.6 microns, and the third spacing is 1.8 microns.

7. The display panel according to claim 2, characterized in that: The refractive index of the first dimming layer is 1.3-1.55, and the refractive index of the second dimming layer is 1.55-2.

8. The display panel according to claim 7, characterized in that: The refractive index of the first dimming layer is 1.45, and the refractive index of the second dimming layer is 1.

67.

9. The display panel according to claim 2, characterized in that: The display panel further includes an encapsulation layer disposed between the pixel definition layer and the dimming layer, wherein the encapsulation layer includes a first inorganic layer and a second inorganic layer stacked together, and a buffer layer disposed between the first inorganic layer and the second inorganic layer.

10. The display panel according to claim 9, characterized in that: The display panel further includes a touch layer disposed between the encapsulation layer and the dimming layer, and the touch layer includes a patterned touch electrode; wherein the non-hollow area covers the touch electrode.

11. An electronic device, characterized in that: It comprises a shell component and a display panel connected to one side of the shell component; wherein the display panel is the display panel according to any one of claims 1-10.

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