Display device

Abstract

The application relates to a display device, comprising a display panel, comprising a substrate; a multilayer electrochromic layer, which is arranged in a thickness direction and is arranged on a light-emitting side of the display panel; in a display area of the display device, each electrochromic layer is provided with a plurality of openings, and the orthographic projection of the openings of at least two electrochromic layers on the substrate does not overlap; wherein the working mode of the electrochromic layer comprises a transparent state and a non-transparent state; thus, in different working modes of the electrochromic layer, the shielding degree of the electrochromic layer to the outgoing light of the display panel is different, and the orthographic projection of the openings of at least two electrochromic layers on the substrate does not overlap, so that the outgoing light of different viewing angles of the display panel can be shielded through at least two electrochromic layers, thereby realizing a multi-viewing-angle switchable dynamic anti-peeping function.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display device. Background Technology

[0002] With the continuous development of display technology and the increasing attention people pay to personal information privacy, privacy display technology has emerged. Related technologies typically involve adding a privacy film to the display screen to reduce the viewing angle and achieve privacy functionality. However, this method cannot achieve dynamic privacy protection with multiple viewpoints, thus limiting its application scenarios. Summary of the Invention

[0003] Therefore, it is necessary to provide a display device that can realize dynamic privacy protection function with multiple viewpoints switchable.

[0004] This application provides a display device, including:

[0005] Display panel, including substrate;

[0006] A multilayer electrochromic layer is stacked along the thickness direction on the light-emitting side of the display panel; within the display area of ​​the display device, each electrochromic layer is provided with multiple openings, and the orthographic projections of the openings of at least two electrochromic layers on the substrate do not overlap; wherein, the operating modes of the electrochromic layer include a transparent state and an opaque state.

[0007] In one embodiment, the multilayer electrochromic layer includes a first electrochromic layer, and the display panel includes a plurality of sub-pixels located within the display area; wherein...

[0008] The first electrochromic layer includes a plurality of first openings, one sub-pixel corresponds to one first opening, and the center of the orthographic projection of the first opening on the substrate coincides with the center of the orthographic projection of the corresponding sub-pixel on the substrate;

[0009] Optionally, the orthographic projection of the first opening on the substrate is located within the orthographic projection of the corresponding sub-pixel on the substrate.

[0010] In one embodiment, the multilayer electrochromic layer further includes a second electrochromic layer; wherein,

[0011] The second electrochromic layer includes a plurality of second openings, one sub-pixel corresponds to one second opening, and the orthographic projection of the second opening on the substrate does not overlap with the orthographic projection of each of the first openings on the substrate;

[0012] Optionally, the orthographic projection area of ​​the second opening on the substrate is smaller than the orthographic projection area of ​​the corresponding sub-pixel on the substrate.

[0013] In one embodiment, on the substrate, the distance between the first side of the orthographic projection of the second opening corresponding to the same sub-pixel and the second side of the orthographic projection of the first opening is 1 μm to 5 μm, wherein the first side and the second side are adjacent.

[0014] In one embodiment, the orthographic projection of the second opening on the substrate lies within the orthographic projection of the corresponding sub-pixel on the substrate.

[0015] In one embodiment, the multilayer electrochromic layer further includes a third electrochromic layer; wherein,

[0016] The third electrochromic layer includes a plurality of third openings, one sub-pixel corresponds to one third opening, and the orthographic projection of the third opening on the substrate does not overlap with the orthographic projection of each of the first openings on the substrate, and the orthographic projection of the third opening on the substrate does not overlap with the orthographic projection of each of the second openings on the substrate;

[0017] Optionally, the projected area of ​​the third opening on the substrate is smaller than the projected area of ​​the corresponding sub-pixel on the substrate;

[0018] Optionally, the orthographic projection of the third opening on the substrate and the orthographic projection of the second opening on the substrate are located on different sides of the orthographic projection of the first opening on the substrate.

[0019] In one embodiment, on the substrate, the distance between the third side of the orthographic projection of the third opening corresponding to the same sub-pixel and the fourth side of the orthographic projection of the first opening is 1 μm to 5 μm, wherein the third side and the fourth side are adjacent.

[0020] In one embodiment, the orthographic projection of the third opening on the substrate lies within the orthographic projection of the corresponding sub-pixel on the substrate.

[0021] In one embodiment, the orthographic projection of the second opening on the substrate and the orthographic projection of the corresponding sub-pixel on the substrate overlap in multiple portions;

[0022] The orthographic projection of the third opening on the substrate and the orthographic projection of the corresponding sub-pixel on the substrate overlap in multiple parts.

[0023] In one embodiment, the first electrochromic layer, the second electrochromic layer, and the third electrochromic layer are disposed sequentially away from the light-emitting side of the display panel.

[0024] The aforementioned display device includes a display panel, which includes a substrate. The display device also includes multiple electrochromic layers, which are stacked along their thickness on the light-emitting side of the display panel. Within the display area of ​​the display panel, each electrochromic layer has multiple openings. The electrochromic layers operate in both transparent and opaque modes. Thus, under different operating modes, the electrochromic layers block different degrees of light emitted from the display panel. Furthermore, the orthographic projections of the openings of at least two electrochromic layers onto the substrate do not overlap, allowing at least two electrochromic layers to block light emitted from different viewing angles of the display panel, thereby achieving a dynamic privacy protection function with switchable multi-view angles. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology 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.

[0026] Figure 1 This is a top view schematic diagram of a display device according to an embodiment;

[0027] Figure 2 for Figure 1 A magnified view of a portion of point P on the display device;

[0028] Figure 3 for Figure 2 Cross-sectional view;

[0029] Figure 4 One of the schematic diagrams showing the first opening, the second opening, the third opening, and the sub-pixel projected onto the substrate;

[0030] Figure 5 This is the second schematic diagram showing the first opening, the second opening, the third opening, and the sub-pixel projected onto the substrate.

[0031] Figure 6 This is the third schematic diagram showing the first opening, the second opening, the third opening, and the sub-pixel projected onto the substrate.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10 - Subpixel, 20 - Electrochromic layer, 20_1 - First electrochromic layer, 20_2 - Second electrochromic layer, 20_3 - Third electrochromic layer, 210 - Opening, 211 - First opening, 212 - Second opening, 213 - Third opening, 211' - Orthographic projection of the first opening on the substrate, 212' - Orthographic projection of the second opening on the substrate, 213' - Orthographic projection of the first opening on the substrate, 10' - Orthographic projection of the subpixel on the substrate. Detailed Implementation

[0034] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0036] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0037] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0038] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0039] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0040] In one exemplary embodiment, combined with Figures 1 to 3 A display device is provided, which includes a display panel and a multilayer electrochromic layer.

[0041] The display panel can be any of the following: Liquid Crystal Display (LCD), Organic Light Emitting Diode (OLED), Quantum Dot Light Emitting Diode (QLED), or Micro Light Emitting Diode (Micro LED), without any limitation.

[0042] Taking an OLED display panel as an example, the display panel may include a substrate, an anode layer, a light-emitting layer, and a cathode layer. The substrate may be an array substrate. The array substrate is used to support the film layers or devices such as the anode layer, light-emitting layer, and cathode layer in the display panel, and to control the current flowing into the light-emitting layer. The array substrate may include a substrate and multiple thin-film transistors (TFTs) disposed on the substrate; wherein, the substrate mainly plays a supporting role; the substrate may be a rigid substrate made of materials such as glass or plastic, or a flexible substrate made of materials such as polyethersulfone (PES), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyarylate, polyimide (PI), polycarbonate (PC), or cellulose acetate propionate (CAP); the multiple thin-film transistors may be arranged in an array on the substrate. The array substrate may also include a planarization film layer covering the multiple thin-film transistors and the substrate to improve the flatness of the array substrate. For example, the array substrate may include multiple buffer layers, multiple metal layers, multiple insulating layers, and a planarization layer stacked on the substrate, and the array substrate may also include multiple metal traces disposed on the substrate.

[0043] The anode layer is located on the array substrate, such as on the planarization layer, and is used to provide the charge carriers, such as holes, required for the light-emitting layer to emit light. The anode layer may include multiple anodes arranged in an array, which may correspond to some thin-film transistors in the array substrate. For example, each anode can be connected to a corresponding thin-film transistor through a via in the planarization layer, and the switching of the corresponding thin-film transistor can control whether to energize the anode, thereby controlling the light emission of the light-emitting layer. The anode can also be understood as the anode of an organic light-emitting diode. The material of the anode layer is generally a material with a high work function in order to improve the hole injection efficiency. It can be gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium tin oxide (ITO), zinc tin oxide (IZO), or transparent conductive polymers (such as polyaniline), etc., without limitation.

[0044] A pixel definition layer may also be provided on the array substrate. The pixel definition layer covers the multiple anodes and the array substrate. The pixel definition layer includes multiple sub-pixel openings, which correspond one-to-one with the multiple anodes. Each sub-pixel opening exposes a corresponding anode.

[0045] The light-emitting layer is located on the surface of the anode layer away from the array substrate. The light-emitting layer covers the pixel definition layer and can cover the anode exposed by the sub-pixel opening to connect with the anode, allowing the anode to provide holes to the light-emitting layer. The light-emitting layer may include stacked hole injection layers, hole transport layers, OLED organic material layers, electron transport layers, and electron injection layers, etc.

[0046] The cathode layer is located on the surface of the light-emitting layer away from the anode layer, and is used to provide the charge carriers, such as electrons, required for light emission. The cathode layer can be a single, continuous film covering the light-emitting layer. The cathode layer is generally made of a material with a low work function to facilitate electron injection. The cathode layer material can be one of the following metals: silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca), or indium (In), or an alloy of the aforementioned metals, such as magnesium-silver alloy (Mg / Ag) or lithium-aluminum alloy (Li / Al). No specific limitations are imposed here.

[0047] Electrons provided by the cathode layer and holes provided by the anode layer combine within the light-emitting layer to achieve light emission. Based on this, the display panel may include multiple sub-pixels corresponding one-to-one with the aforementioned multiple sub-pixel openings. Each sub-pixel includes an anode exposed by a sub-pixel opening, an internally filled hole injection layer, a hole transport layer, an OLED organic material layer, an electron transport layer, an electron injection layer, and a cathode. Here, a sub-pixel can be understood as an organic light-emitting diode (OLED).

[0048] Subpixels include, for example, red subpixels R, green subpixels G, and blue subpixels B. Subpixel emission includes light emitted from the subpixel in various directions, such as light emitted from a direction perpendicular to the array substrate and light emitted from the side of the subpixel. For example, the light emitted from the subpixel in the direction perpendicular to the array substrate includes light rays facing away from the array substrate towards the light-emitting side of the display panel and light rays facing away from the light-emitting side towards the array substrate; the light rays facing away from the array substrate towards the light-emitting side are emitted on the screen display side, constituting the narrow viewing angle light of the display panel; the light rays facing away from the light-emitting side towards the array substrate cannot be emitted from the screen display side; the light rays emitted from the side of the subpixel are emitted on the screen display side, constituting the wide viewing angle light of the display panel.

[0049] The display panel may also include an encapsulation layer located on the side of the cathode layer away from the light-emitting layer, for encapsulating the display panel.

[0050] Based on this, multiple electrochromic layers are stacked along their thickness direction on the light-emitting side of the display panel, for example, stacked on the side of the encapsulation layer away from the cathode layer. The operating modes of the electrochromic layer include a transparent state and an opaque state. For example, when the electrochromic layer is energized, it is transparent; when it is not energized, it is opaque. Alternatively, when it is not energized, it is transparent; when it is energized, it is opaque. In the case of a transparent state, light can pass through the electrochromic layer almost completely, while in the case of an opaque state, light cannot pass through the electrochromic layer.

[0051] The display device may include a display area and a non-display area, with sub-pixels 10 located in the display area and the non-display area surrounding it. In the display area of ​​the display device, combined with... Figure 2 and Figure 3 Each electrochromic layer 20 is provided with multiple openings 210, and the orthographic projections of the openings 210 of at least two electrochromic layers 20 on the substrate do not overlap.

[0052] For example, when the electrochromic layer 20_1 is opaque and both the electrochromic layers 20_2 and 20_3 are transparent, the viewing angle of the display device is viewing angle 1. In this case, only the user directly in front of the light-emitting side of the display device can see the display image, thus preventing privacy for users located to the left and right of the light-emitting side. When the electrochromic layer 20_2 is opaque and both the electrochromic layers 20_1 and 20_3 are transparent, the viewing angle of the display device is viewing angle 2. In this case, only the user located to the left of the light-emitting side of the display device can see the display image, thus preventing privacy for users directly in front of and right of the light-emitting side. When the electrochromic layer 20_3 is in a non-transparent state, and both the electrochromic layers 20_1 and 20_2 are in a transparent state, the viewing angle of the display device is viewing angle 3. At this time, only the user located on the right side of the light-emitting side of the display device can see the display screen, thus preventing the user located directly in front of the light-emitting side of the display device and the user located on the left side of the light-emitting side of the display device from peeping.

[0053] Thus, in the solution of this application embodiment, the electrochromic layer blocks the emitted light from the display panel to different degrees in different working modes, and the orthographic projections of the openings of at least two electrochromic layers on the substrate do not overlap, so that the emitted light from different viewing angles of the display panel can be blocked by at least two electrochromic layers, thereby realizing a dynamic privacy protection function with multiple viewpoints switchable.

[0054] In one exemplary embodiment, combined with Figure 2 and Figure 3 The multilayer electrochromic layer includes a first electrochromic layer 20_1, meaning that one of the electrochromic layers in the multilayer electrochromic layer is the first electrochromic layer 20_1. The first electrochromic layer 20_1 includes a plurality of first openings 211, with one first opening 211 corresponding to one sub-pixel 10. The center of the orthographic projection 211' of the first opening 211 on the substrate coincides with the center of the orthographic projection 10' of the corresponding sub-pixel 10 on the substrate. The orthographic projection 211' of the first opening 211 on the substrate is located within the orthographic projection 10' of the corresponding sub-pixel 10 on the substrate.

[0055] Thus, when the first electrochromic layer 20_1 is in a non-transparent state, and both the electrochromic layers 20_2 and 20_3 are in a transparent state, the viewing angle of the display device is viewing angle 1. At this time, only the user directly in front of the light-emitting side of the display device can see the display image through the inside of the first opening 211. Through the outside of the first opening 211, privacy is provided for the user on the left side of the light-emitting side of the display device and the user on the right side of the light-emitting side of the display device.

[0056] In one exemplary embodiment, combined with Figure 2 and Figure 3 The multilayer electrochromic layer includes a second electrochromic layer 20_2, meaning that one of the electrochromic layers in the multilayer electrochromic layer is the second electrochromic layer 20_2. The second electrochromic layer 20_2 includes a plurality of second openings 212, with one sub-pixel 10 corresponding to one second opening 212. The orthographic projection 212' of the second opening 212 on the substrate does not overlap with the orthographic projection 211' of each first opening 211 on the substrate. The area of ​​the orthographic projection 212' of the second opening 212 on the substrate is smaller than the area of ​​the orthographic projection 10' of the corresponding sub-pixel 10 on the substrate.

[0057] Thus, when the second electrochromic layer 20_2 is in a non-transparent state, and both the electrochromic layers 20_1 and 20_3 are in a transparent state, the viewing angle of the display device is viewing angle 2. At this time, only the user located on the left side of the light-emitting side of the display device can see the display image through the inside of the second opening 212. Through the outside of the second opening 212, privacy is provided for the user located directly in front of the light-emitting side of the display device and the user located on the right side of the light-emitting side of the display device.

[0058] In one exemplary embodiment, combined with Figures 2 to 4 On the substrate, the distance D1 between the first side of the orthographic projection of the second opening 212 corresponding to the same sub-pixel 10 and the second side of the orthographic projection of the first opening 211 is 1μm to 5μm, wherein the first side and the second side are adjacent.

[0059] In this way, it can be ensured that when the second electrochromic layer 20_2 is in a non-transparent state, only the user on the left side of the light-emitting side of the display device can see the display image through the inside of the second opening 212, and the user in front of the light-emitting side of the display device and the user on the right side of the light-emitting side of the display device can be prevented from peeping through the outside of the second opening 212.

[0060] In one exemplary embodiment, combined with Figures 2 to 4 The orthographic projection 212' of the second opening 212 on the substrate is located within the orthographic projection 10' of the corresponding sub-pixel 10 on the substrate.

[0061] In this way, while ensuring the implementation of dynamic privacy protection that can be switched between different viewing angles, the setting of the second opening 212 is avoided from affecting the density setting of the sub-pixels 10 in the display panel.

[0062] In one exemplary embodiment, combined with Figure 2 and Figure 3The multilayer electrochromic layer further includes a third electrochromic layer 20_3, meaning that one of the electrochromic layers in the multilayer electrochromic layer is the third electrochromic layer 20_3. The third electrochromic layer 20_3 includes a plurality of third openings 213, with one sub-pixel 10 corresponding to one third opening 213. The orthographic projection 213' of the third opening 213 on the substrate does not overlap with the orthographic projection 211' of each first opening 211 on the substrate, nor does it overlap with the orthographic projection 212' of each second opening 212 on the substrate. The area of ​​the orthographic projection 213' of the third opening 213 on the substrate is smaller than the area of ​​the orthographic projection 10' of the corresponding sub-pixel 10 on the substrate.

[0063] Thus, when the third electrochromic layer 20_3 is in a non-transparent state, and both the electrochromic layers 20_1 and 20_2 are in a transparent state, the viewing angle of the display device is viewing angle 3. At this time, only the user located on the right side of the light-emitting side of the display device can see the display image through the inside of the third opening 213. Through the outside of the third opening 213, privacy is provided for the user located directly in front of the light-emitting side of the display device and the user located on the left side of the light-emitting side of the display device.

[0064] In one exemplary embodiment, combined with Figures 2 to 4 The orthographic projection 213' of the third opening 213 on the substrate and the orthographic projection 212' of the second opening 212 on the substrate are located on different sides of the orthographic projection 211' of the first opening 211 on the substrate. For example, they can be located on opposite sides of the orthographic projection 211' of the first opening 211 on the substrate, or on adjacent sides of the orthographic projection 211' of the first opening 211 on the substrate, thereby realizing a dynamic privacy function with switchable viewing angles to meet the user's dynamic privacy needs from different viewing angles.

[0065] In one exemplary embodiment, combined with Figures 2 to 4 On the substrate, the distance D2 between the third side of the orthographic projection of the third opening 213 corresponding to the same sub-pixel 10 and the fourth side of the orthographic projection of the first opening 211 is 1μm to 5μm, wherein the third side and the fourth side are adjacent.

[0066] In this way, it can be ensured that when the third electrochromic layer 20_3 is in a non-transparent state, the viewing angle of the display device is viewing angle 3. At this time, only the user on the right side of the light-emitting side of the display device can see the display screen through the inside of the third opening 213. Through the outside of the third opening 213, privacy is provided for the user directly in front of the light-emitting side of the display device and the user on the left side of the light-emitting side of the display device.

[0067] In one exemplary embodiment, combined with Figure 2 and Figure 3The orthographic projection 213' of the third opening 213 on the substrate is located within the orthographic projection 10' of the corresponding sub-pixel 10 on the substrate.

[0068] In this way, while ensuring the implementation of dynamic privacy protection that can be switched between different viewing angles, the setting of the third opening 213 is avoided from affecting the density setting of the sub-pixels 10 in the display panel.

[0069] In one exemplary embodiment, combined with Figures 5 to 6 The orthographic projection of the second opening 212 on the substrate overlaps with the orthographic projection of the corresponding sub-pixel 10 on the substrate in at most a portion; the orthographic projection 213' of the third opening 213 on the substrate overlaps with the orthographic projection of the corresponding sub-pixel 10 on the substrate in at most a portion. This allows for more flexible opening configurations, better meeting users' needs for privacy protection from different viewing angles.

[0070] In one exemplary embodiment, combined with Figure 2 and Figure 3 The first electrochromic layer 20_1, the second electrochromic layer 20_2, and the third electrochromic layer 20_3 are sequentially positioned away from the light-emitting side of the display panel.

[0071] In the embodiments of this application, the electrochromic layer blocks the emitted light from the display panel to different degrees under different working modes. The orthographic projections of the openings of at least two electrochromic layers on the substrate do not overlap, so that the emitted light from different viewing angles of the display panel can be blocked by at least two electrochromic layers, thereby realizing a dynamic privacy protection function with multiple viewpoints that can be switched.

[0072] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A display device, characterized in that, include: Display panel, including substrate; A multilayer electrochromic layer is stacked along the thickness direction on the light-emitting side of the display panel; Within the display area of ​​the display device, each electrochromic layer is provided with multiple openings, and the orthographic projections of the openings of at least two electrochromic layers on the substrate do not overlap; wherein, the operating modes of the electrochromic layer include a transparent state and an opaque state.

2. The display device according to claim 1, characterized in that, The multilayer electrochromic layer includes a first electrochromic layer, and the display panel includes a plurality of sub-pixels located within the display area; wherein... The first electrochromic layer includes a plurality of first openings, one sub-pixel corresponds to one first opening, and the center of the orthographic projection of the first opening on the substrate coincides with the center of the orthographic projection of the corresponding sub-pixel on the substrate; Optionally, the orthographic projection of the first opening on the substrate is located within the orthographic projection of the corresponding sub-pixel on the substrate.

3. The display device according to claim 2, characterized in that, The multilayer electrochromic layer further includes a second electrochromic layer; wherein... The second electrochromic layer includes a plurality of second openings, one sub-pixel corresponds to one second opening, and the orthographic projection of the second opening on the substrate does not overlap with the orthographic projection of each of the first openings on the substrate; Optionally, the orthographic projection area of ​​the second opening on the substrate is smaller than the orthographic projection area of ​​the corresponding sub-pixel on the substrate.

4. The display device according to claim 3, characterized in that, On the substrate, the distance between the first side of the orthographic projection of the second opening corresponding to the same sub-pixel and the second side of the orthographic projection of the first opening is 1 μm to 5 μm, wherein the first side and the second side are adjacent.

5. The display device according to claim 3, characterized in that, The orthographic projection of the second opening on the substrate is located within the orthographic projection of the corresponding sub-pixel on the substrate.

6. The display device according to claim 3, characterized in that, The multilayer electrochromic layer further includes a third electrochromic layer; wherein... The third electrochromic layer includes a plurality of third openings, one sub-pixel corresponds to one third opening, and the orthographic projection of the third opening on the substrate does not overlap with the orthographic projection of each of the first openings on the substrate, and the orthographic projection of the third opening on the substrate does not overlap with the orthographic projection of each of the second openings on the substrate; Optionally, the projected area of ​​the third opening on the substrate is smaller than the projected area of ​​the corresponding sub-pixel on the substrate; Optionally, the orthographic projection of the third opening on the substrate and the orthographic projection of the second opening on the substrate are located on different sides of the orthographic projection of the first opening on the substrate.

7. The display device according to claim 6, characterized in that, On the substrate, the distance between the third side of the orthographic projection of the third opening corresponding to the same sub-pixel and the fourth side of the orthographic projection of the first opening is 1 μm to 5 μm, wherein the third side and the fourth side are adjacent.

8. The display device according to claim 6, characterized in that, The orthographic projection of the third opening on the substrate is located within the orthographic projection of the corresponding sub-pixel on the substrate.

9. The display device according to claim 6, characterized in that, The orthographic projection of the second opening on the substrate overlaps with the orthographic projection of the corresponding sub-pixel on the substrate in multiple parts; The orthographic projection of the third opening on the substrate and the orthographic projection of the corresponding sub-pixel on the substrate overlap in multiple parts.

10. The display device according to claim 6, characterized in that, The first electrochromic layer, the second electrochromic layer, and the third electrochromic layer are disposed sequentially away from the light-emitting side of the display panel.

Images