Display device

Abstract

The present application provides a display device. The display device includes: a substrate substrate, including a first display area and a second display area, the second display area at least partially surrounding the first display area; a plurality of pixel circuits located on one side of the substrate substrate; a plurality of light-emitting units located on the side of the plurality of pixel circuits away from the substrate substrate, the plurality of light-emitting units including a plurality of first light-emitting units located in the first display area and a plurality of second light-emitting units located in the second display area; a color filter layer located on the side of the plurality of light-emitting units away from the substrate substrate, including a light-transmitting layer disposed in the first display area and a black matrix layer disposed in the second display area, the light-transmitting layer allowing part of the light to pass through; the light-transmitting layer has a light-transmitting layer opening, and a first color-resist unit corresponding to the first light-emitting unit is disposed in the light-transmitting layer opening; the black matrix layer has a black matrix opening, and a second color-resist unit corresponding to the second light-emitting unit is disposed in the black matrix opening. The display device of the present application can improve the light transmittance.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a display device. Background Art

[0002] Currently, there are increasingly high requirements for the screen-to-body ratio of consumer products such as mobile phones in the market. However, the traditional water-drop screens and notch screens have low aesthetic appeal. Therefore, the under-screen camera technology that can achieve full-screen display urgently needs to be developed. Generally, a region that can be used for both display and image acquisition is set on the display panel. In addition to normal display, the pixel region of this region has a high transmittance, which can meet the imaging requirements of the camera. Summary of the Invention

[0003] In view of this, the purpose of this application is to propose a display device.

[0004] Based on the above purpose, this application provides a display device, including:

[0005] A substrate, including a first display area and a second display area, and at least part of the second display area surrounds the first display area;

[0006] A plurality of pixel circuits, located on one side of the substrate;

[0007] A plurality of light-emitting units, located on the side of the plurality of pixel circuits away from the substrate. The plurality of light-emitting units include a plurality of first light-emitting units located in the first display area and a plurality of second light-emitting units located in the second display area;

[0008] A color filter layer, located on the side of the plurality of light-emitting units away from the substrate, including a light-transmitting layer disposed in the first display area and a black matrix layer disposed in the second display area. The light-transmitting layer allows part of the light to pass through; the light-transmitting layer has a light-transmitting layer opening, and a first color-resist unit corresponding to the first light-emitting unit is disposed in the light-transmitting layer opening; the black matrix layer has a black matrix opening, and a second color-resist unit corresponding to the second light-emitting unit is disposed in the black matrix opening.

[0009] Optionally, the light-transmitting layer includes a first gray scale layer, and the transmittance of the first gray scale layer is 20%-70%.

[0010] Optionally, the color filter layer further includes:

[0011] A transparent flat layer, which is disposed between the first gray layer and the first color-resist unit in the first display area, and the first color-resist unit is disposed on the side of the transparent flat layer away from the substrate; the transparent flat layer is disposed between the black matrix layer and the second color-resist unit in the second display area, and the second color-resist unit is disposed on the side of the transparent flat layer away from the substrate.

[0012] Optionally, the color filter layer further includes:

[0013] A convex prism, which is disposed between two adjacent first color-resist units, and the edge of the convex prism forms a slope surface on the side of the first color-resist unit away from the substrate, and the included angle between the slope surface and the side of the first color-resist unit away from the substrate is an acute angle;

[0014] A filling layer, which is disposed on the side of the convex prism away from the substrate, and the refractive index of the filling layer is less than that of the convex prism.

[0015] Optionally, the refractive index of the convex prism is less than that of the transparent flat layer.

[0016] Optionally, the side of the convex prism away from the substrate includes a plane or an arc surface connected to the slope surface, and the orthographic projection of the plane or the arc surface on the substrate does not overlap with the orthographic projection of the side of the first color-resist unit away from the substrate on the substrate.

[0017] Optionally, the color filter layer further includes:

[0018] A second gray layer, which is disposed on the side of the black matrix layer away from the substrate, and the orthographic projection of the black matrix layer on the substrate is located within the orthographic projection of the second gray layer on the substrate;

[0019] The refractive index of the first gray layer is less than that of the transparent flat layer, and the refractive index of the second gray layer is less than that of the transparent flat layer.

[0020] Optionally, the color filter layer further includes:

[0021] A third gray layer, which is disposed in the black matrix opening, the transmittance of the third gray layer is 20%-70%, and at least a part of the orthographic projection of the second light-emitting unit on the substrate overlaps with at least a part of the orthographic projection of the third gray layer on the substrate.

[0022] Optionally, at least a part of the second light-emitting unit includes a green sub-pixel light-emitting unit.

[0023] Optionally, the light-transmitting layer includes:

[0024] A first black matrix unit, which is disposed around the first color resist unit, and a light-transmitting area is formed between adjacent first black matrix units.

[0025] Optionally, it further includes metal traces disposed between the pixel circuits and located in the light-transmitting area; the light-transmitting layer further includes:

[0026] A second black matrix unit, which is disposed in the light-transmitting area, and at least part of the orthographic projection of the second black matrix unit on the substrate overlaps with the orthographic projection of the metal trace on the substrate.

[0027] Optionally, the transmittance of the first color resist unit and the second color resist unit is greater than 80%; the color filter layer further includes:

[0028] A gray planarization layer, which is disposed on the side of the first color resist unit and the second color resist unit away from the substrate.

[0029] Optionally, the transmittance of the gray planarization layer is 40%-70%, and the ratio of the transmittance of the gray planarization layer at three bands of 450nm / 550nm / 650nm is between 0.8 and 1.2 for each pair.

[0030] Optionally, it further includes:

[0031] A first electrode layer, which is disposed between the plurality of pixel circuits and the plurality of light-emitting units, includes a first electrode unit disposed in the first display area and a second electrode unit disposed in the second display area, the first electrode unit corresponds to the first light-emitting unit one by one, and the second electrode unit corresponds to the second light-emitting unit one by one;

[0032] A second electrode layer, which is disposed between the plurality of light-emitting units and the color filter layer; the second electrode layer is patterned in the first display area to form a third electrode unit, and the third electrode unit corresponds to the first light-emitting unit one by one.

[0033] Optionally, it further includes:

[0034] A touch electrode layer, which is disposed between the second electrode layer and the color filter layer, or disposed on the side of the color filter layer away from the substrate.

[0035] As can be seen from the above, the display device provided by the present application includes a color filter layer. In the second display area, the color filter layer has a conventional COE structure formed by a black matrix layer and a second color resist unit. This COE structure can be used instead of a polarizer, reducing the reflection of structures such as the anode layer and cathode layer in the display device while increasing the light transmittance. In the first display area, the color filter layer replaces the opaque black matrix layer with a light-transmitting layer that allows some light to pass through. In this way, some of the incident light from the outside can pass through the light-transmitting layer and enter the under-screen camera, transmitting more light than the black matrix layer and improving the light transmittance of the first display area, thereby enhancing the shooting quality of the under-screen camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] To more clearly illustrate the technical solutions in the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 It is a schematic plan view of the display device in the embodiment of the present application;

[0038] Figure 2 It is a schematic diagram of light transmission in the under-screen camera display area in the related technology;

[0039] Figure 3 It is a schematic diagram of light transmission directly setting the COE structure in the embodiment of the present application;

[0040] Figure 4 It is a schematic diagram of the structure of the display device described in the embodiment of the present application;

[0041] Figure 5 It is a schematic diagram of the transmittance spectrum line of the first gray scale layer in the embodiment of the present application;

[0042] Figure 6 It is a schematic diagram of the structure of the display device provided with a transparent flat layer in the embodiment of the present application;

[0043] Figure 7a It is a schematic diagram of the structure of the display device including a convex prism in the embodiment of the present application;

[0044] Figure 7b It is another schematic diagram of the structure of the display device including a convex prism in the embodiment of the present application;

[0045] Figure 8 It is a schematic diagram of the reflection of the convex prism in the embodiment of the present application;

[0046] Figure 9Schematic structural diagram of the display device according to the embodiment of the present application including a second gray scale layer;

[0047] Figure 10 Schematic structural diagram of the display device according to the embodiment of the present application including a third gray scale layer;

[0048] Figure 11 Another schematic structural diagram of the display device according to the embodiment of the present application;

[0049] Figure 12 Top view of the display device according to the embodiment of the present application. Detailed implementation manners

[0050] To make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0051] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the ordinary meanings understood by those of ordinary skill in the art to which the present application belongs. The "first", "second" and similar terms used in the embodiments of the present application do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0052] As Figure 2 shown, in the related art, in the under-screen camera display area (FDC area) of the OLED display device, the external incident light needs to pass through the glass cover plate, touch sensor panel (TSP) 7', polarizer (POL) 6', encapsulation layer (EN) 5', cathode layer 4', light-emitting layer (EL) 3' in sequence, and then enter the under-screen camera through the area between the pixel anodes 2'. Among them, the polarizer is used in the OLED display device to prevent the reflection of film layers such as the backplane (BP) 1' and the cathode layer 4', and its transmittance is about 45%; the transmittance of the cathode layer is about 60%. Therefore, the polarizer 6' and the cathode layer 4' will greatly affect the light transmittance.

[0053] To improve the light transmittance and meet the light transmission requirements of the under-screen camera, when designing the under-screen camera area, either by reducing the resolution of the under-screen camera display area or making the pixel anodes 2' in the under-screen camera display area smaller than those in the normal display area to improve the light transmittance, as shown in Figure 2 However, this design still cannot meet the requirements of the light transmittance of high-quality cameras, resulting in a decline in the quality of the captured images. At the same time, since the pixel anodes in the under-screen camera display area are smaller, the current density on the pixel anodes is larger during light emission, which will accelerate the aging of the light-emitting layer in this area, resulting in a reduction in the lifespan of the light-emitting layer; when displaying at low gray levels, due to the very large capacitance on the ITO, there is a brightness difference between the under-screen camera display area and the normal display area, resulting in a poor display effect.

[0054] The inventor of the present application found that the COE (Color film on Encapsulation) technology is a technology that replaces the function of the polarizer (POL) by adding RGB color resist units and a black matrix (BM) above the backplane and the light-emitting layer of the OLED display panel. The transmittance of the RGB color resist units used in the COE technology is generally between 55% and 65%, which is higher than the transmittance of the polarizer. Therefore, using the COE technology to replace the polarizer can improve the light transmittance of the light-emitting layer.

[0055] However, as shown in Figure 3 The inventor of the present application found that if the COE structure is directly placed on the encapsulation layer 5, in the under-screen camera display area, the black matrix in the COE structure covers all areas except the light-emitting area, and the black matrix absorbs light and is therefore opaque. Therefore, the COE structure cannot be used in the FDC area because its BM photoresist is opaque and will absorb light. In the light-emitting area, the light of the camera is blocked by the pixel anode, and in the non-light-emitting area, the camera light is blocked by the black matrix in the COE structure. Therefore, the COE structure cannot be directly applied to the under-screen camera display area.

[0056] For the above reasons, the embodiments of the present application provide a display device that uses the COE structure to replace the polarizer and simultaneously replaces the black matrix in the COE structure with a light-transmitting layer that allows part of the light to pass through in the under-screen camera display area, thereby improving the light transmittance of the OLED display device.

[0057] As shown in Figure 4 The display device includes a substrate 1, a plurality of pixel circuits, a plurality of light-emitting units, and a color film layer 8.

[0058] Among them, the substrate 1 includes a first display area 100 and a second display area 200, and the second display area 200 at least partially surrounds the first display area 100. As Figure 1 shown, the substrate 1 may further include a peripheral area 300 disposed around the second display area 200. A plurality of pixel circuits are disposed on one side of the substrate 1, and each pixel circuit is connected to each light-emitting unit for driving each light-emitting unit to emit light.

[0059] A plurality of light-emitting units are disposed on the side of the plurality of pixel circuits away from the substrate 1. The plurality of light-emitting units include a plurality of first light-emitting units 31 disposed in the first display area 100 and a plurality of second light-emitting units 32 disposed in the second display area 200. Among them, the first light-emitting unit 31 and the second light-emitting unit 32 may respectively include R, G, B three-color light-emitting units, or may be light-emitting units that emit white light.

[0060] The color filter layer 8 is disposed on the side of the plurality of light-emitting units away from the substrate 1. As Figure 4 shown, the color filter layer 8 includes a light-transmitting layer 81 disposed in the first display area 100 and a black matrix layer 82 disposed in the second display area 200; the light-transmitting layer 81 allows part of the light to pass through. Since the light-transmitting layer 81 can allow part of the light to pass through, part of the light in the external incident light can pass through the light-transmitting layer and enter the under-screen camera, transmitting more light than the black matrix layer, improving the light transmittance of the first display area 100, and thus improving the shooting quality of the under-screen camera.

[0061] Among them, the light-transmitting layer 81 has a light-transmitting layer opening, and a first color resist unit 83 corresponding to the first light-emitting unit 31 is disposed in the light-transmitting layer opening. Optionally, the first color resist unit 83 is disposed in one-to-one correspondence with the first light-emitting unit 31, that is, each sub-pixel unit in the first display area 100 corresponds to one first color resist unit 83.

[0062] The black matrix layer 82 has a black matrix opening, and a second color resist unit 84 corresponding to the second light-emitting unit 32 is disposed in the black matrix opening. Optionally, the second color resist unit 84 is disposed in one-to-one correspondence with the second light-emitting unit 32, that is, each sub-pixel unit in the second display area 200 corresponds to one second color resist unit 84. Among them, both the first color resist unit 83 and the second color resist unit 84 may include color resist units of R, G, B three colors.

[0063] Optionally, the light-transmitting layer 81 is patterned to form the light-transmitting layer opening, and the black matrix layer 82 is patterned to form the black matrix opening.

[0064] Optionally, the first color filter unit 83 and the first light-emitting unit 31 may not be arranged in one-to-one correspondence. For example, one first color filter unit 83 may be arranged corresponding to multiple first light-emitting units 31. Similarly, one second color filter unit 84 may be arranged corresponding to multiple second light-emitting units 32. This embodiment does not limit this.

[0065] Optionally, in the first display area 100, the color of the first color filter unit 83 corresponding to the same sub-pixel unit is the same as the light-emitting color of the first light-emitting unit 31. For example, when the light-emitting color of the first light-emitting unit 31 is red, the corresponding first color filter unit 83 is also red. Similarly, in the second display area 200, the color of the second color filter unit 84 corresponding to the same sub-pixel unit is the same as the light-emitting color of the second light-emitting unit 32.

[0066] Optionally, in the first display area 100, the color of the first color filter unit 83 corresponding to the same sub-pixel unit may also be different from the light-emitting color of the first light-emitting unit 31. For example, when the light-emitting color of the first light-emitting unit 31 is white, the corresponding first color filter unit 83 is red, and at this time, this sub-pixel unit will emit red light. Similarly, in the second display area 200, the color of the second color filter unit 84 corresponding to the same sub-pixel unit may also be different from the light-emitting color of the second light-emitting unit 32.

[0067] In this embodiment, the display device includes a color film layer. The color film layer in the second display area is a conventional COE structure formed by a black matrix layer and a second color filter unit. This COE structure can be used instead of a polarizer. While reducing the reflection of structures such as the anode layer and the cathode layer in the display device, it can improve the light transmittance. In the first display area, the color film layer replaces the light-impermeable black matrix layer with a light-transmitting layer that allows some light to pass through. In this way, some of the external incident light can pass through the light-transmitting layer and enter the under-screen camera, transmitting more light than the black matrix layer, improving the light transmittance of the first display area, and thus improving the shooting quality of the under-screen camera.

[0068] Optionally, the first display area 100 is an under-screen camera display area, which can simultaneously implement display and camera functions; the second display area 200 is a normal display area, which can implement a display function. And the first display area 100 can be arranged at any position of the display device, and the shape and size of the first display area 100 can be set arbitrarily. In a specific embodiment, the length or diameter of the first display area 100 can be less than or equal to 5 mm.

[0069] Optionally, an image acquisition element of an under-screen camera is provided below the display device, that is, on the side of the substrate substrate 1 away from the color filter layer 8, and the image acquisition element is disposed in the first display area 100 to implement the under-screen camera function. Optionally, if necessary, the image acquisition element can also be disposed inside the display device, and this embodiment does not limit this.

[0070] Optionally, in the first display area 100, there is an overlapping portion between the light-transmitting layer 81 and the first color resist unit 83, and the overlapping length is 1-4 μm; in the second display area 200, there is an overlapping portion between the black matrix layer 82 and the second color resist unit 84, and the overlapping length is 1-8 μm.

[0071] Optionally, the display device further includes a packaging layer (EN) 5, and the packaging layer 5 is disposed between the light-emitting unit and the color filter layer 8, that is, the color filter layer 8 is formed on the packaging layer 5.

[0072] In some embodiments, as Figure 4 shown, the light-transmitting layer 81 includes a first gray scale layer, and the transmittance of the first gray scale layer is 20%-70%. In this embodiment, since the transmittance of the first gray scale layer is 20%-70%, when implementing the under-screen camera function, 20%-70% of the external incident light passes through the first gray scale layer and enters the under-screen camera through the light-transmitting area between the first electrode units 21. At the same time, the light reflected by the anode layer, cathode layer and other structures and incident on the first gray scale layer can also be absorbed at least partially. Thus, not only the anti-reflection function is realized, but also more light can pass through compared with the BM, so as to improve the transmittance of the first display area 100 and improve the under-screen camera quality. At the same time, the setting of the first gray scale layer can balance the structural hue of the color filter layer 8 and avoid the effect that the first display area 100 only sets the first color resist unit 83 and cannot achieve the effect of integrated black.

[0073] In an optional embodiment, the transmittance of the first gray scale layer is 20%-70%, and the transmittance spectrum of the visible light transmission ability (400-780 nm) of the first gray scale layer is as Figure 5 shown. Optionally, the transmission waveform of the first gray scale layer is not limited to Figure 5 the shown transmittance spectrum. Any first gray scale layer that satisfies the transmittance requirement is the content claimed in this embodiment, and this embodiment does not limit this.

[0074] Optionally, in this embodiment, the thickness THK of the first gray scale layer needs to satisfy the following relationship:

[0075] THK = (m + 1 / 4)λ (m is 0, 1, 2, 3, 4...)

[0076] Among them, λ is the wavelength of the wave whose reflectivity needs to be reduced. Therefore, by setting the first gray scale layer, the reflectivity of a specific wavelength can be reduced to facilitate the increase of light transmittance.

[0077] In some embodiments, the color film layer 8 further includes a transparent flat layer 85. As Figure 6 shown, in the first display area 100, the transparent flat layer 85 is disposed between the first gray scale layer and the first color resist unit 83, and the first color resist unit 83 is disposed on the side of the transparent flat layer 85 away from the substrate 1. In the second display area 200, the transparent flat layer 85 is disposed between the black matrix layer 82 and the second color resist unit 84, and the second color resist unit 84 is disposed on the side of the transparent flat layer 85 away from the substrate 1. That is, after the first gray scale layer and the black matrix layer 82 are formed on the display device, a transparent flat layer 85 is first formed. Since the transparent flat layer 85 is transparent, it does not affect the light transmittance. At the same time, after the transparent flat layer 85 is formed, the first color resist unit 83 and the second color resist unit 84 are formed on the flat surface of the transparent flat layer 85.

[0078] In this embodiment, when manufacturing the first gray scale layer and the black matrix layer 82, due to the nature of the first gray scale layer, in order to meet the transmittance requirement of 20%-70%, the thickness of the first gray scale layer will be greater than that of the black matrix layer 82 in the actual manufacturing process. As a result, when manufacturing the first color resist unit 83 and the second color resist unit 84 subsequently, without adjusting the process, the thickness of the first color resist unit 83 will be greater than that of the second color resist unit 84, resulting in different display effects in the first display area 100 and the second display area 200. If the process is adjusted to regulate the amount of the material for forming the first color resist unit 83 so that the finally formed first color resist unit 83 and the second color resist unit 84 have the same thickness, the process complexity is relatively high and it is not easy to implement. Therefore, after the first gray scale layer and the black matrix layer 82 are formed, a transparent flat layer 85 is manufactured to ensure that the surface of the display device is flat before manufacturing the first color resist unit 83 and the second color resist unit 84, so that the first color resist unit 83 and the second color resist unit 84 with the same thickness can be obtained without process adjustment, ensuring the uniformity of the display effects in the first display area 100 and the second display area 200.

[0079] Optionally, the thickness of the first color resist unit 83 and the second color resist unit 84 can also be ensured to be the same by process adjustment, and this embodiment does not limit this.

[0080] In some embodiments, such as Figure 7a 、 Figure 7bAs shown, the color film layer 8 further includes a convex prism 87 and a filling layer 86. Among them, the convex prism 87 is disposed between two adjacent first color resistance units 83. The edge of the convex prism 87 forms a slope surface on the side of the first color resistance unit 83 away from the substrate 1, and the included angle between the slope surface and the side of the first color resistance unit 83 away from the substrate 1 is an acute angle θ. The filling layer 86 is disposed on the surface of the convex prism 87 away from the substrate 1, and the refractive index of the filling layer 86 is less than that of the convex prism 87. Optionally, the filling layer 86 can be a flat layer or a protective layer, so as to protect the structure of the convex prism 87 and prevent the convex prism 87 from being damaged.

[0081] Optionally, as Figure 7a shown, the slope surface can be a plane; as Figure 7b shown, the slope surface can also be an arc surface.

[0082] As Figure 8 shown, when the refractive index n1 of the filling layer 86 is less than the refractive index n2 of the convex prism 87, the light vertically incident on the slope surface at the overlapping portion of the convex prism 87 and the first color resistance unit 83 can be reflected. The reflected light is sequentially incident into the transparent flat layer 85 and the first gray scale layer through the opening between the adjacent first color resistance units 83. This part of the light will neither be partially absorbed by the first color resistance unit 83 passing through the first color resistance unit 83, nor cause light loss due to being reflected after being incident on the anode layer, but transmit this part of the light to the under-screen camera, so that the light in the pixel area can be utilized, increasing the amount of light received by the under-screen camera and improving the shooting effect of the under-screen camera.

[0083] Optionally, in the above embodiment, the transparent flat layer 85, the first color resistance unit 83, and the second color resistance unit 84 are all high refractive index layers, and the first gray scale layer is a low refractive index layer.

[0084] Optionally, the refractive index of the convex prism 87 is less than that of the transparent flat layer 85, so that the laterally converging light is more convergent.

[0085] In some alternative embodiments, as Figure 7a shown, the side of the convex prism 87 away from the substrate 1 includes a plane connected to the slope surface. As Figure 7bAs shown, the side of the convex prism 87 away from the substrate 1 includes an arc surface connected to the ramp surface, and the orthographic projection of the plane or arc surface on the substrate 1 does not overlap with the orthographic projection of the side of the first color resist unit 83 away from the substrate 1 on the backplane 1. That is, in this embodiment, the ramp surface should exceed the width of the first color resist unit 83, and the included angle between the ramp surface and the side of the first color resist unit 83 away from the substrate 1 is an acute angle θ satisfying tanθ ≤ h / d, where h represents the vertical distance between the plane and the first color resist unit 83, and d represents the distance between the connection of the ramp surface and the first color resist unit 83 and the edge of the side of the first color resist unit 83 away from the substrate 1 on the side away from the substrate 1.

[0086] Optionally, in this embodiment, the refractive index of the first gray scale layer is not restricted. The refractive index of the first gray scale layer can be the same as or close to the refractive index of the transparent flat layer 85, or the refractive index of the first gray scale layer can also be greater than or less than the refractive index of the transparent flat layer 85.

[0087] Optionally, in the second display area 200, a color film covering layer 871 is provided on the side of the second color resist unit 84 away from the substrate 1. The color film covering layer 871 fills the space between adjacent second color resist units 84 to make the display device flat. Among them, the thickness of the color film covering layer 871 can be the same as the thickness of the convex prism 87, and the color film covering layer 871 and the convex prism 87 can be formed of the same material. Alternatively, the second display area 200 may not be provided with the color film covering layer 871, and this embodiment does not limit this.

[0088] In some embodiments, as Figure 9 shown, the color film layer further includes a second gray scale layer 88. Among them, the second gray scale layer 88 is provided on the side of the black matrix layer 82 away from the substrate 1; optionally, the transmittance of the second gray scale layer 88 is 20%-70%, and the transmittance of the second gray scale layer 88 is the same as the transmittance of the first gray scale layer. Therefore, the first gray scale layer and the second gray scale layer 88 can be formed by a single patterning process. As Figure 9 shown, the orthographic projection of the black matrix layer 82 on the substrate 1 is located within the orthographic projection of the second gray scale layer 88 on the substrate 1, that is, the width of the second gray scale layer 88 exceeds the width of the black matrix layer 82 so that the edge of the second gray scale layer 88 is formed on the side of the black matrix layer 82 perpendicular to the substrate 1.

[0089] Meanwhile, the refractive index of the first gray scale layer is less than that of the transparent flat layer 85, so that the light emitted by the first light-emitting unit 31 in the first display area 100 can be reflected to the first color-resist unit 83 and then emitted when it is transmitted to the side of the first gray scale layer, thereby enhancing the light-emitting efficiency of the first display area 100; similarly, the refractive index of the second gray scale layer 88 is less than that of the transparent flat layer 85, so that the light emitted by the second light-emitting unit 32 in the second display area 200 can be reflected to the second color-resist unit 84 and then emitted when it is transmitted to the side of the second gray scale layer 88, thereby enhancing the light-emitting efficiency of the second display area 200.

[0090] In some embodiments, as Figure 10 shown, the color filter layer further includes a third gray scale layer 89. The third gray scale layer 89 is disposed in the black matrix opening. Optionally, the transmittance of the third gray scale layer 89 is 20%-70%, and the transmittance of the third gray scale layer 89 can be the same as that of the first gray scale layer, and the first gray scale layer and the third gray scale layer 89 can be formed by a single patterning process. Alternatively, the transmittance of the third gray scale layer 89 can also be different from that of the first gray scale layer, and those skilled in the art can adjust the transmittance of the third gray scale layer 89 according to actual needs, and this embodiment does not limit this.

[0091] Meanwhile, at least a part of the orthographic projection of the second light-emitting unit 32 on the substrate 1 at least partially overlaps with the orthographic projection of the third gray scale layer 89 on the substrate 1, that is, the third gray scale layer 89 is disposed corresponding to some or all of the second light-emitting units 32. When the third gray scale layer 89 is provided, the light emitted by the second light-emitting unit 32 first passes through the third gray scale layer 89 and then enters the second color-resist unit 84, thereby controlling the light transmittance of the second display area 200.

[0092] Optionally, at least a part of the second light-emitting unit 32 includes a green sub-pixel light-emitting unit, that is, the third gray scale layer 89 is disposed corresponding to the green sub-pixel light-emitting unit. Since the light-emitting efficiency of the green sub-pixel light-emitting unit is the highest, it may cause the display of the display device to be green-biased. At this time, the transmittance of the green light emitted by the green sub-pixel light-emitting unit is reduced by the setting of the third gray scale layer 89, thereby improving the problem of green bias in the display. Optionally, in this embodiment, the third gray scale layer 89 is not limited to being disposed corresponding to the green sub-pixel light-emitting unit. In cases where necessary, the third gray scale layer 89 can also be disposed corresponding to the red sub-pixel light-emitting unit and the blue sub-pixel light-emitting unit, and this embodiment does not limit this.

[0093] In some embodiments, as Figure 11As shown, the display device further includes a first electrode layer 2 disposed between the plurality of pixel circuits and the plurality of light-emitting units, and a second electrode layer 4 disposed between the plurality of light-emitting units and the color filter layer. Among them, the first electrode layer 2 includes a first electrode unit 21 patterned in the first display area 100 and a second electrode unit 22 patterned in the second display area 200. Among them, a pixel defining layer (PDL) 12 is further disposed on a side of the first electrode layer 2 away from the substrate 1, and the pixel defining layer (PDL) 12 defines a plurality of pixel opening areas on the substrate 1. The first electrode unit 21 includes a first electrode portion that does not fall into the pixel opening area, and this first electrode portion overlaps with the pixel defining layer 12.

[0094] As Figure 11 shown, the light-transmitting layer 81 includes a first black matrix unit 801. The first black matrix unit 801 surrounds the first color resist unit 83, and a light-transmitting area is formed between adjacent first black matrix units 801, so that external incident light can enter the image acquisition element of the under-screen camera through this light-transmitting area. As Figure 11 、 Figure 12 shown, the orthographic projection of the first black matrix unit 801 on the substrate 1 and the orthographic projection of the first electrode portion on the substrate 1 at least partially overlap, that is, the first black matrix unit 801 is used to block a part of the first electrode unit 21 that extends outward from the edge of the pixel defining layer 12, that is, the first black matrix unit 801 is used to block the first electrode unit 21 in the non-opening area.

[0095] In some alternative embodiments, as Figure 11 shown, the display device further includes a metal trace 11 disposed between the pixel circuits and located in the light-transmitting area. Among them, the metal trace 11 may include a gate line, a data line, etc.; if an on cell touch layer is integrated between the encapsulation layer 5 and the color filter layer 8, the metal trace 11 may include a touch electrode metal trace.

[0096] When a metal trace 11 is disposed in the light-transmitting area, the light-transmitting layer 81 further includes a second black matrix unit 802. The second black matrix unit 802 is disposed in the light-transmitting area, and the orthographic projection of the second black matrix unit 802 on the substrate 1 and the orthographic projection of the metal trace 11 on the substrate 1 at least partially overlap, so that the reflected light of the metal trace 11 can be blocked by the second black matrix unit 802, that is, the reflectivity of the metal trace 11 can be reduced by the second black matrix unit 802.

[0097] Optionally, in the above embodiment, the transmittance of the first color resist unit 83 and the second color resist unit 84 may be 55%-65%.

[0098] In some other embodiments, since the first color filter unit 83 and the second color filter unit 84 can only transmit red, green, and blue light respectively, it is impossible to adjust all optical parameters to appropriate states. As shown in Table 1 below, Schemes 1 - 4 describe four COE structures of the first display area 100. It can be seen that from Scheme 1 - 4, the Tr% gain (transmittance), reflectance (R total 、R 550nm ), reflection hue (a * 、b * ) of these parameters cannot be balanced, affecting the display effect; at the same time, for Schemes 2 and 4, since the G color filter unit accounts for a relatively large proportion, the light received by the under-screen camera is significantly greenish, which has an adverse effect on the shooting effect of the under-screen camera.

[0099] Table 1

[0100]

[0101] For the above reasons, in one embodiment, the transmittances of the first color filter unit 83 and the second color filter unit 84 are set to be greater than 80%; at the same time, the color film layer 8 further includes a gray flat layer 803. As Figure 11 shown, the gray flat layer 803 is disposed on the side of the first color filter unit 83 and the second color filter unit 84 away from the substrate 1. Among them, the transmittance of the gray flat layer 803 is 40% - 70%, and the ratio of the transmittances of the gray flat layer 803 at the three wavelength bands of 450nm / 550nm / 650nm is between 0.8 and 1.2 for each pair.

[0102] In this embodiment, when the transmittances of the first color filter unit 83 and the second color filter unit 84 are greater than 80%, the too high transmittance will result in a poor anti-reflection effect. Therefore, a gray flat layer 803 is added to the first color filter unit 83 and the second color filter unit 84. On the one hand, it can improve the anti-reflection effect, and on the other hand, it can adjust parameters such as transmittance, reflectance, and reflection hue to make them balanced.

[0103] As shown in Table 2, the optical parameters of the first display area 100 and the second display area 200 are listed when the transmittances of the RGB color filter units and the gray flat layer 803 change. It can be seen from Table 2 that as the transmittance of the gray flat layer 803 increases, the overall transmittance gain of the display device increases, but the reflectance also increases, but the reflection hue can generally be maintained at pure black. Compared with the data in Table 1, the Tr% gain (transmittance), reflectance (R total 、R 550nm ), reflection hue (a * 、b *These parameters can achieve a relatively balanced state.

[0104] Table 2

[0105]

[0106] Meanwhile, the materials of the first color resist unit 83 and the second color resist unit 84 in the first display area 100 and the second display area 200 are exactly the same, and the gray flat layer 803 can replace the protective film (OC). Therefore, there is no need to set an additional protective film, and the transmittance, reflectivity, and reflection color phase of the first display area 100 can be adjusted to an optimal state without adding an additional mask and process.

[0107] In some embodiments, the display device further includes a first electrode layer 2 disposed between the plurality of pixel circuits and the plurality of light-emitting units, and a second electrode layer 4 disposed between the plurality of light-emitting units and the color film layer.

[0108] As Figure 11 shown, the first electrode layer 2 includes a first electrode unit 21 patterned in the first display area 100 and a second electrode unit 22 patterned in the second display area 200. Optionally, the first electrode layer 2 can be an anode layer, and accordingly, both the first electrode unit 21 and the second electrode unit 22 can be anode units, and each anode unit corresponds to a sub-pixel unit. In some embodiments, the areas of the anode units corresponding to the sub-pixel units of the same color in the first display area 100 and the second display area 200 are the same, and accordingly, the aperture ratios of the sub-pixel units of the same color in the first display area 100 and the second display area 200 are the same. In some other alternative embodiments, the areas of the anode units corresponding to the sub-pixel units of the same color in the first display area 100 and the second display area 200 are different, and accordingly, the aperture ratio of the sub-pixel units in the first display area 100 is smaller than the aperture ratio of the sub-pixel units of the same color in the second display area 200; for example, the area of the anode unit in the first display area 100 is smaller than the area of the anode unit in the second display area 200, so as to improve the light transmittance in the first display area 100, enabling more external incident light to enter the under-screen camera through the gaps between the anode units and improving the shooting quality of the under-screen camera.

[0109] As Figure 11 shown, the second electrode layer 4 is patterned in the first display area 100 to form a third electrode unit 41, and the third electrode unit 41 corresponds to the first light-emitting unit 31 one by one. In this embodiment, the second electrode layer 4 is a cathode layer. In the first display area 100, the cathode layer is patterned to form a third electrode unit 41 corresponding to the first light-emitting unit 31 one by one, while in the second display area 200, the cathode layer remains a whole-surface electrode structure.

[0110] In this way, in the first display area 100, the external incident light can pass through the gaps between the third electrode units 41 and then enter the under-screen camera, thereby improving the light transmittance in the first display area 100. In this way, both the cathode layer and the polarizer layer, which originally absorb the most light, are removed, and the light transmittance can be increased by more than one time. Taking the 15% transmittance in the traditional solution as an example, if the cathode patterning is done, its transmittance can be increased by 40% to 21%; combined with the COE BM patterning technology, the light transmittance can be further increased by 55% to about 32.55%, which is more than double that of the traditional technical solution.

[0111] At the same time, after the light transmittance is improved, there is no need to increase the current density on the pixel anode, so it will not cause the accelerated aging of the light-emitting layer, and thus there will be no problem that the life of the under-screen camera display area is lower than that of the normal display area. Under low gray-scale display, problems such as stripe mura in the camera display area can also be solved.

[0112] Optionally, the display device further includes a touch electrode layer 7. Wherein, the touch electrode layer 7 can be disposed between the second electrode layer 4 and the color filter layer 8, or can also be disposed on the side of the color filter layer 8 away from the substrate 1. When the touch electrode layer 7 is disposed on the side of the color filter layer 8 away from the substrate 1, that is, when the color filter layer 8 is disposed between the encapsulation layer 5 and the touch electrode layer 7, the angle between the light and the color filter layer 8 can be reduced, thereby solving the problems of viewing angle and color shift.

[0113] Optionally, in the above embodiment, the light-transmitting layer 81, the black matrix layer 82, the first color resist unit 83, the second color resist unit 84, the gray flat layer 803, etc. are all made of low-temperature curing materials and can be directly made on the encapsulation layer 5 or on the on-cell touch layer through processes such as coating, exposure, and development.

[0114] It should be noted that the display device in this embodiment can be: an electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator, or any product or component with a display function.

[0115] It should be noted that in the accompanying drawings, the dimensions of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or intervening layers may be present. Additionally, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element, or more than one intervening layer or element may be present. Further, it will be understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or more than one intervening layer or element may also be present. Like reference numerals throughout the specification indicate like elements.

[0116] Those of ordinary skill in the art should understand that: the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present application (including the claims) is limited to these examples; within the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the embodiments of the present application as described above, and for the sake of brevity, they are not provided in detail.

[0117] In addition, for simplicity of explanation and discussion, and in order not to make the embodiments of the present application difficult to understand, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Further, the devices may be shown in block diagram form in order not to make the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the present application are to be implemented (i.e., these details should be fully within the understanding of those skilled in the art). In cases where specific details (such as circuits) are set forth to describe exemplary embodiments of the present application, it will be apparent to those skilled in the art that the embodiments of the present application can be implemented without these specific details or with variations of these specific details. Accordingly, these descriptions should be considered illustrative rather than restrictive.

[0118] Although the present application has been described in connection with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. For example, other memory architectures (such as dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0119] The embodiments of the present application are intended to cover all such alternatives, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application shall be included within the protection scope of the present application.

Claims

1. A display device, characterized in that, Comprising: A substrate substrate, including a first display area and a second display area, wherein the second display area at least partially surrounds the first display area; A plurality of pixel circuits located on one side of the substrate substrate; A plurality of light-emitting units located on the side of the plurality of pixel circuits away from the substrate substrate, the plurality of light-emitting units including a plurality of first light-emitting units located in the first display area and a plurality of second light-emitting units located in the second display area; A color filter layer located on the side of the plurality of light-emitting units away from the substrate substrate, including a light-transmitting layer provided in the first display area and a black matrix layer provided in the second display area, the light-transmitting layer allowing part of the light to pass through; the light-transmitting layer has a light-transmitting layer opening, and a first color-resist unit corresponding to the first light-emitting unit is provided in the light-transmitting layer opening; The black matrix layer has a black matrix opening, and a second color-resist unit corresponding to the second light-emitting unit is provided in the black matrix opening; A first electrode layer, including a first electrode unit provided in the first display area and a second electrode unit provided in the second display area, the first electrode unit including a first electrode portion not falling into the pixel opening area; wherein, a pixel defining layer is provided on the side of the first electrode layer away from the substrate substrate, and the pixel opening area is defined on the substrate substrate through the pixel defining layer; The light-transmitting layer includes: A first black matrix unit disposed around the first color-resist unit, and a light-transmitting area is formed between adjacent first black matrix units; wherein, the orthographic projection of the first black matrix unit on the substrate substrate and the orthographic projection of the first electrode portion on the substrate substrate at least partially overlap.

2. The display device according to claim 1, characterized in that, It further includes a metal trace disposed between the pixel circuits and located in the light-transmitting area; the light-transmitting layer further includes: A second black matrix unit disposed in the light-transmitting area, and the orthographic projection of the second black matrix unit on the substrate substrate and the orthographic projection of the metal trace on the substrate substrate at least partially overlap.

3. The display device according to claim 2, characterized in that, The transmittance of the first color-resist unit and the second color-resist unit is greater than 80%; the color filter layer further includes: A gray flat layer provided on the side of the first color-resist unit and the second color-resist unit away from the substrate substrate.

4. The display device according to claim 3, characterized in that, The transmittance of the gray flat layer is 40% - 70%, and the ratio of the transmittance of the gray flat layer at three wavelength bands of 450nm / 550nm / 650nm is between 0.8 and 1.2 for each pair.

5. The display device according to any one of claims 1-4, characterized in that, The first electrode layer is disposed between the plurality of pixel circuits and the plurality of light-emitting units, the first electrode unit corresponds to the first light-emitting unit one by one, and the second electrode unit corresponds to the second light-emitting unit one by one; The display device further includes: A second electrode layer disposed between the plurality of light-emitting units and the color filter layer; The second electrode layer is patterned in the first display area to form a third electrode unit, and the third electrode unit corresponds to the first light-emitting unit one by one.

6. The display device according to claim 5, characterized in that, It further includes: A touch electrode layer disposed between the second electrode layer and the color filter layer, or disposed on the side of the color filter layer away from the substrate substrate.

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