Display panel, manufacturing method thereof and display device

Abstract

Disclosed are a display panel and a manufacturing method therefor, and a display device. The display panel comprises: a plurality of light-emitting units; a narrow-viewing-angle structure, which is arranged on a light-emission side of the plurality of light-emitting units, and is configured to selectively emit first light rays, which are within a first viewing angle range, from light rays emitted by the plurality of light-emitting units; and an angle deflection structure, which is arranged on a side of the narrow-viewing-angle structure that is away from the plurality of light-emitting units, and is configured to adjust the first light rays to be second light rays, which are within a second viewing angle range.

Description

Technical Field

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

[0002] With the development of automotive technology, in-vehicle displays are becoming increasingly common. Equipping cars with head-up displays (HUDs) allows drivers to see information such as navigation and speed without turning or looking down, improving driving safety.

[0003] Currently, there are two main technological schools of thought for head-up displays: Liquid Crystal on Silicon (LCOS), which uses reflection to form color images; and Digital Light Processing (DLP), which processes the image signal digitally before projecting the light.

[0004] However, both types of head-up displays suffer from low brightness and slow response times.

[0005] Technical issues

[0006] This application provides a display panel and its manufacturing method, as well as a display device, to improve the brightness and response speed of a head-up display.

[0007] Technical solutions

[0008] To address the aforementioned issues, this application provides a display panel comprising: a plurality of light-emitting units; a narrow viewing angle structure covering the light-emitting side of the plurality of light-emitting units for selectively emitting a first light ray within a first viewing angle range from the light emitted by the plurality of light-emitting units; and an angle deflection structure located on the side of the narrow viewing angle structure opposite to the plurality of light-emitting units for adjusting the first light ray to a second light ray within a second viewing angle range.

[0009] The light-emitting unit is a Micro-LED.

[0010] The narrow viewing angle structure includes a spacer layer and a selective light-emitting layer. The spacer layer is located on the light-emitting side of the multiple light-emitting units, and the selective light-emitting layer is located on the side of the spacer layer away from the multiple light-emitting units. The selective light-emitting layer includes multiple light-transmitting areas and light-blocking areas located between the light-transmitting areas. The first light ray is emitted from the multiple light-transmitting areas.

[0011] In this configuration, the orthogonal projection centers of multiple light-emitting units on the selective light-emitting layer coincide with the centers of multiple light-transmitting areas; or, the orthogonal projection centers of multiple light-emitting units on the selective light-emitting layer are offset by a preset distance relative to the centers of multiple light-transmitting areas in a first direction, and the first direction is parallel to the selective light-emitting layer.

[0012] The selective light-emitting layer is a first black matrix with multiple opening regions.

[0013] The angle deflection structure includes multiple prisms, each including a first surface and a second surface. The first surface is parallel to a second direction, and the angle between the second surface and the second direction is an acute angle. The second direction is perpendicular to the narrow-view structure. The first light ray enters the angle deflection structure through the narrow-view structure and is refracted by the second surface before exiting the angle deflection structure to obtain the second light ray.

[0014] The display panel further includes: an array substrate located on the side of the multiple light-emitting units facing away from the narrow viewing angle structure, the array substrate including a control circuit, and the light-emitting units electrically connected to the control circuit; and a second black matrix located between the array substrate and the narrow viewing angle structure, and surrounding the periphery of the light-emitting units.

[0015] To address the aforementioned issues, this application also provides a method for manufacturing a display panel. The method includes: providing a plurality of light-emitting units; forming a narrow viewing angle structure covering the light-emitting side of the plurality of light-emitting units for selectively emitting a first light ray within a first viewing angle range from the light emitted by the plurality of light-emitting units; and forming an angle deflection structure located on the side of the narrow viewing angle structure away from the plurality of light-emitting units for adjusting the first light ray to a second light ray within a second viewing angle range.

[0016] Specifically, forming a narrow viewing angle structure includes: forming a narrow viewing angle structure including a spacer layer and a selective light-emitting layer, wherein the spacer layer is located on the light-emitting side of multiple light-emitting units, the selective light-emitting layer is located on the side of the spacer layer away from the multiple light-emitting units, and the selective light-emitting layer includes multiple light-transmitting areas and light-blocking areas located between the light-transmitting areas, and the first light ray is emitted from the multiple light-transmitting areas.

[0017] Specifically, forming an angle deflection structure includes: forming an angle deflection structure comprising multiple prisms, each prism comprising a first surface and a second surface, the first surface being parallel to a second direction, the second surface being at an acute angle to the second direction, the second direction being perpendicular to a narrow-view structure, and the first light ray entering the angle deflection structure through the narrow-view structure, being refracted by the second surface, and exiting the angle deflection structure to obtain a second light ray.

[0018] To address the aforementioned issues, this application also provides a display device, which includes a driving circuit and a display panel. The driving circuit provides a driving voltage to the display panel. The display panel includes: a plurality of light-emitting units; a narrow viewing angle structure covering the light-emitting side of the plurality of light-emitting units for selectively emitting a first light ray within a first viewing angle range from the light emitted by the plurality of light-emitting units; and an angle deflection structure located on the side of the narrow viewing angle structure away from the plurality of light-emitting units for adjusting the first light ray to a second light ray within a second viewing angle range.

[0019] The light-emitting unit is a Micro-LED.

[0020] The narrow viewing angle structure includes a spacer layer and a selective light-emitting layer. The spacer layer is located on the light-emitting side of the multiple light-emitting units, and the selective light-emitting layer is located on the side of the spacer layer away from the multiple light-emitting units. The selective light-emitting layer includes multiple light-transmitting areas and light-blocking areas located between the light-transmitting areas. The first light ray is emitted from the multiple light-transmitting areas.

[0021] In this configuration, the orthogonal projection centers of multiple light-emitting units on the selective light-emitting layer coincide with the centers of multiple light-transmitting areas; or, the orthogonal projection centers of multiple light-emitting units on the selective light-emitting layer are offset by a preset distance relative to the centers of multiple light-transmitting areas in a first direction, and the first direction is parallel to the selective light-emitting layer.

[0022] The selective light-emitting layer is a first black matrix with multiple opening regions.

[0023] The angle deflection structure includes multiple prisms, each including a first surface and a second surface. The first surface is parallel to a second direction, and the angle between the second surface and the second direction is an acute angle. The second direction is perpendicular to the narrow-view structure. The first light ray enters the angle deflection structure through the narrow-view structure and is refracted by the second surface before exiting the angle deflection structure to obtain the second light ray.

[0024] The display panel further includes: an array substrate located on the side of the multiple light-emitting units facing away from the narrow viewing angle structure, the array substrate including a control circuit, and the light-emitting units electrically connected to the control circuit; and a second black matrix located between the array substrate and the narrow viewing angle structure, and surrounding the periphery of the light-emitting units.

[0025] Beneficial effects

[0026] The beneficial effects of this application are as follows: The display panel and its manufacturing method and display device provided by this application include multiple light-emitting units, a narrow viewing angle structure covering the light-emitting side of the multiple light-emitting units, and an angle deflection structure located on the side of the narrow viewing angle structure away from the multiple light-emitting units. The narrow viewing angle structure can selectively emit a first light ray within a first viewing angle range from the light emitted by the multiple light-emitting units, and the angle deflection structure can adjust the first light ray to a second light ray within a second viewing angle range. This provides a display panel with a novel structure that can be used in a head-up display in a vehicle. Furthermore, when this display panel is applied to an in-vehicle display, it can use light-emitting units with fast response speed and high brightness (e.g., Micro-LED), thereby improving the brightness and response speed of the head-up display in the vehicle. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0028] Figure 1 This is a cross-sectional structural diagram of the display panel provided in an embodiment of this application;

[0029] Figure 2 yes Figure 1 A schematic diagram of the first field of view range corresponding to the narrow field of view structure;

[0030] Figure 3 yes Figure 1 A schematic diagram of the second viewpoint range corresponding to the mid-angle deflection structure;

[0031] Figure 4 This is another cross-sectional structural diagram of the display panel provided in the embodiment of this application;

[0032] Figure 5 This is a top view of the array substrate provided in the embodiments of this application;

[0033] Figure 6 This is a flowchart illustrating the method for manufacturing a display panel according to an embodiment of this application;

[0034] Figure 7 This is a schematic diagram of the structure of the display device provided in the embodiments of this application.

[0035] Implementation methods of this application

[0036] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0037] Furthermore, when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between itself and the other layer or region. Also, if the component is flipped, the layer or region will be located "below" or "under" the other layer or region. Moreover, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0038] Please see Figures 1 to 3 , Figure 1 This is a cross-sectional structural diagram of the display panel provided in an embodiment of this application. Figure 2 yes Figure 1 A schematic diagram of the first-viewpoint range corresponding to the narrow-viewpoint structure. Figure 3 yes Figure 1 A schematic diagram of the second viewing angle range corresponding to the mid-angle deflection structure. (See diagram below.) Figures 1 to 3 As shown, the display panel 10 includes a plurality of light-emitting units 11, a narrow-viewing-angle structure 12 covering the light-emitting side of the plurality of light-emitting units 11, and an angle-deflecting structure 13 located on the side of the narrow-viewing-angle structure 12 facing away from the plurality of light-emitting units 11. The narrow-viewing-angle structure 12 can selectively emit a first light ray L1 from the light emitted by the plurality of light-emitting units 11 that falls within a first viewing angle range A. The angle-deflecting structure 13 can adjust the first light ray L1 to a second light ray L2 that falls within a second viewing angle range B.

[0039] Furthermore, for ease of understanding and explanation, the angle between the ray and the normal N of the display panel 10 is defined as: the angle formed when the ray turns towards the normal N of the display panel 10 at an acute angle. If the turn is clockwise, the angle between the ray and the normal N is a positive acute angle; if the turn is counterclockwise, the angle between the ray and the normal N is a negative acute angle. The normal N of the display panel 10 is parallel to the thickness direction of the display panel 10 (i.e., [missing information]). Figure 1 (in the Z direction).

[0040] Specifically, such as Figure 2As shown, the first view range A can be from -β1 to +β2, where the values ​​of β1 and β2 can be from 0° to 30°, and β1 and β2 can be equal, for example, β1 and β2 can be equal to 20°, or they can be unequal, for example, β1 can be equal to 10° and β2 can be equal to 30°.

[0041] Of the light emitted by the light-emitting unit 11, only the light rays whose angle with the normal N is between -β1 and +β2 (i.e., the first light ray L1) can exit from the light-emitting side of the narrow-view structure 12 after entering it. Furthermore, the light rays L3 emitted by the light-emitting unit 11 whose angle with the normal N is outside the range of -β1 to +β2 will be absorbed by the narrow-view structure 12 after entering it, and therefore will not exit from it.

[0042] Therefore, the angle range between the first ray L1 and the normal N (that is, the first viewing angle range A) is smaller than the angle range between the ray emitted by the light-emitting unit 11 and the normal N (that is, the light emission angle of the light-emitting unit 11). This is because the narrow viewing angle structure 12 absorbs the wide viewing angle ray emitted by the light-emitting unit 11, so the narrow viewing angle structure 12 can have a better narrow viewing angle effect.

[0043] In this embodiment, as Figure 3 As shown, the aforementioned second viewing angle range B can be the user's viewing angle of the display panel 10. For example, when the display panel 10 is applied to an in-vehicle display, the aforementioned second viewing angle range B can specifically be the driver's viewing angle. Furthermore, compared to the conventional display panel where the main viewing angle direction is parallel to the normal direction, in this embodiment, the main viewing angle direction of the display panel 10 is parallel to the normal direction of the display panel 10 (i.e., the viewing angle direction is parallel to the normal direction of the display panel 10). Figure 3 The angle between the Z direction and the normal direction of the display panel 10 is acute, meaning that the user's viewing angle of the display panel 10 will deviate from the normal direction of the display panel 10.

[0044] In one specific embodiment, such as Figure 3 As shown, the second perspective range B can be from β3 to β4, where β4 is greater than β3, and the values ​​of β3 and β4 can be from 0° to 30°. For example, β3 can be equal to 20° and β4 can be equal to 36°.

[0045] Specifically, such as Figure 1 As shown, after the first light ray L1 enters the angle deflection structure 13 through the narrow viewing angle structure 12, the angle deflection structure 13 will cause the propagation direction of the first light ray L1 to change directionally, so as to obtain the second light ray L2 emitted from the angle deflection structure 13 pointing to a specific viewing angle (that is, the second viewing angle range B), thereby enabling the display panel 10 to be used in the head-up display of a vehicle.

[0046] In one embodiment, the light-emitting unit 11 can be a light-emitting diode (LED), such as a red LED, a green LED, or a blue LED.

[0047] In one specific embodiment, the aforementioned light-emitting unit can be a micro-light-emitting diode (Micro-LED), such as a red Micro-LED, a green Micro-LED, or a blue Micro-LED. Micro-LEDs, employing inorganic light-emitting diode technology, can achieve nanosecond-level response speeds and possess advantages such as low power consumption, high brightness, and long lifespan.

[0048] Therefore, compared to existing head-up displays based on reflective liquid crystal on silicon (LCOS) and digital light processing (DLP) technologies, which suffer from slow response times and low brightness, the display panel 10 of this embodiment improves the brightness and response speed of the head-up display in a vehicle by using light-emitting units 11 (e.g., Micro-LED) with fast response times and high brightness. Furthermore, the narrow viewing angle structure 12 in this embodiment can absorb the wide-viewing-angle light emitted by the light-emitting units 11, allowing light-emitting devices with large emission angles to also be used as light-emitting units 11 in the display panel 10 of this embodiment. This greatly broadens the selection of light-emitting units 11, enabling the use of ultra-high brightness, wide-emission-angle light-emitting devices as the light-emitting units 11, thereby improving the brightness and response speed of the head-up display in the vehicle.

[0049] Specifically, such as Figure 1 As shown, the aforementioned plurality of light-emitting units 11 may include red Micro-LED 11a, green Micro-LED 11b, and blue Micro-LED 11c to achieve full-color display of the display panel 10. Furthermore, in specific implementations, the aforementioned plurality of light-emitting units 11 may be arranged in an array to form a light-emitting unit array. The light-emitting unit array may have a minimum repeating unit (for example, a minimum repeating unit including red Micro-LED 11a, green Micro-LED 11b, and blue Micro-LED 11c), and each minimum repeating unit may correspond to a display pixel of the display panel 10.

[0050] In one embodiment, such as Figure 1As shown, the aforementioned narrow viewing angle structure 12 may include a spacer layer 121 and a selective light-emitting layer 122. The spacer layer 121 is located on the light-emitting side of the plurality of light-emitting units 11, and the selective light-emitting layer 122 is located on the side of the spacer layer 121 facing away from the plurality of light-emitting units 11. Specifically, the selective light-emitting layer 122 may include a plurality of light-transmitting areas 122a and light-blocking areas 122b located between the light-transmitting areas 122a. The first light rays L1 emitted by the plurality of light-emitting units 11 can be emitted from the plurality of light-transmitting areas 122a respectively, and the light rays L3 incident on the light-blocking area 122b from the light rays emitted by the plurality of light-emitting units 11 will be absorbed by the light-blocking area 122b, thereby achieving the purpose of narrowing the viewing angle.

[0051] Specifically, the aforementioned multiple light-transmitting areas 122a can correspond one-to-one with the aforementioned multiple light-emitting units 11, and each light-transmitting area 122a can be located directly above its corresponding light-emitting unit 11, and is used to emit the first light ray L1 within the first viewing angle range A of the light emitted by its corresponding light-emitting unit 11.

[0052] Furthermore, in specific implementation, the size of the light-transmitting area 122a can be set according to the pre-selected first viewing angle range A, so that the light-transmitting area 122a allows only the first light ray L1 emitted by its corresponding light-emitting unit 11 within the first viewing angle range A to pass through. The orthographic projection of the light-emitting unit 11 onto the selective light-emitting layer 122 can completely or partially overlap with its corresponding light-transmitting area 122a.

[0053] In one possible application scenario, the sum of the maximum and minimum values ​​within the aforementioned first viewing angle range A can be zero. For example, the first viewing angle range A can be -20° to 20°. Furthermore, in order for the aforementioned light-transmitting area 122a to emit the first ray L1 emitted by its corresponding light-emitting unit 11 within this first viewing angle range A, such as... Figure 1 As shown, the orthogonal projection centers of the plurality of light-emitting units 11 on the selective light-emitting layer 122 can respectively coincide with the centers of the plurality of light-transmitting areas 122a, so as to ensure that the sum of the maximum and minimum values ​​within the first viewing angle range A can be zero.

[0054] In another possible application scenario, the sum of the maximum and minimum values ​​within the aforementioned first viewing angle range A may not be zero. For example, the first viewing angle range A may be -10° to 30°. Furthermore, in order for the aforementioned light-transmitting area 122a to selectively emit the first ray L1 emitted by its corresponding light-emitting unit 11 within the first viewing angle range A, as follows... Figure 4 As shown, the orthogonal projection centers of the aforementioned plurality of light-emitting units 11 on the selective light-emitting layer 122 can be respectively located in the first direction (e.g., adjacent to the first direction). Figure 4The maximum and minimum values ​​within the first viewing angle range A are offset by a preset distance D1 relative to the center of the aforementioned multiple light-transmitting areas 122a in the X direction to ensure that the sum of the maximum and minimum values ​​is not zero.

[0055] The first direction is parallel to the selective light-emitting layer 122 and perpendicular to the thickness direction of the selective light-emitting layer 122 (i.e., the attached direction). Figure 4 (Z direction in the image). The size of the preset distance D1 can be set according to the actual first-view range A as needed.

[0056] In this embodiment, the spacer layer 121 is transparent and can specifically be a transparent adhesive layer, wherein the material of the transparent adhesive layer can be an optically transparent resin. Specifically, when the size and position of the light-transmitting area 122a are fixed, the greater the thickness of the spacer layer 121, the smaller the corresponding first viewing angle range A; conversely, the smaller the thickness of the spacer layer 121, the larger the corresponding first viewing angle range A. Therefore, in the display panel 10, the selected first viewing angle range A can be set by adjusting the size and position of the light-transmitting area 122a and the thickness of the spacer layer 121.

[0057] Specifically, the selective light-emitting layer 122 can be a first black matrix with multiple open areas, wherein the multiple light-transmitting areas 122a can be multiple open areas on the first black matrix, and the light-blocking area 122b can be a non-open area on the first black matrix.

[0058] In one specific embodiment, such as Figure 1 As shown, the display panel 10 may further include a second black matrix 15. The second black matrix 15 is located on the side of the narrow viewing angle structure 12 away from the angle deflection structure 13 and surrounds the periphery of the light-emitting unit 11. It can separate each light-emitting unit 11 from other light-emitting units 11 located around it and absorb the light irradiated to the second black matrix 15, thereby reducing light crosstalk between adjacent light-emitting units 13.

[0059] Furthermore, the second black matrix 15 and the first black matrix can form upper and lower dual absorption cavities. By adjusting the thickness of the spacer layer 121 between the dual cavities, the aforementioned first viewing angle range A can be adjusted. Since the aforementioned second viewing angle range B changes with the first viewing angle range A, the viewing angle of the user on the display panel 10 can be adjusted. Compared with the display panels used in existing head-up displays, the display panel 10 in this embodiment not only meets the requirements of head-up displays for narrow viewing angles and a certain angle between the user's viewing angle and the screen normal, but also has the advantages of mature and simple structural manufacturing process, low cost, and ease of implementation.

[0060] In one possible application scenario, the second black matrix 15 and the first black matrix can have the same opening pattern, thus eliminating the need to design a new black matrix and reducing production costs. Specifically, the orthogonal projections of the plurality of light-emitting units 11 onto the first black matrix can completely coincide with the plurality of opening regions on the first black matrix.

[0061] Furthermore, it is understood that when the second black matrix 15 and the first black matrix have the same opening pattern, that is, when the size and position of the light-transmitting area 122a in the narrow viewing angle structure 12 are fixed, the purpose of setting the selected first viewing angle range A can be achieved by adjusting the offset distance D1 and / or the thickness of the spacer layer 121.

[0062] In some embodiments, such as Figure 1 As shown, the narrow viewing angle structure 12 may further include a transparent substrate 123 located on the side of the selective light emission layer 122 facing away from the spacer layer 121, and the selective light emission layer 122 may be formed on the transparent substrate 123.

[0063] In the above embodiments, such as Figure 1 As shown, the aforementioned angle deflection structure 13 may include multiple prisms 131, wherein each prism 131 may include a first surface 131A and a second surface 131B, and the first surface 131A may be parallel to the second direction (i.e., attached). Figure 1 The angle between the second surface 131B and the second direction (in the Z direction) can be an acute angle. The second direction is perpendicular to the narrow-view structure 12 and parallel to the thickness direction of the narrow-view structure 12. The first ray L1 can enter the angle deflection structure 13 through the narrow-view structure 12, and after being refracted by the second surface 131B, it can exit from the angle deflection structure 13 to obtain the second ray L2.

[0064] Specifically, the second surface 131B of the aforementioned plurality of prisms 131 can be tilted toward a selected viewing angle, so that the first ray L1, after being refracted by the second surface 131B, can be tilted toward the selected viewing angle. Furthermore, in specific implementation, the selected second viewing angle range B can be set by adjusting the angle between the second surface 131B and the normal N in the aforementioned angle deflection structure 13 and the tilt direction of the second surface 131B.

[0065] In one specific embodiment, the aforementioned angle deflection structure 13 may further include a prism base 132, and the prism base 132 and the aforementioned plurality of prisms 131 may be integrally formed. Specifically, the aforementioned plurality of prisms 131 may be formed by the prism base 132 protruding from the surface of the prism base 132 away from the aforementioned narrow viewing angle structure 12 at positions corresponding to the aforementioned plurality of light-emitting units 11 in a direction away from the aforementioned narrow viewing angle structure 12.

[0066] In some embodiments, such as Figure 1 As shown, the display panel 10 may further include a first adhesive layer 18, which is located between the narrow viewing angle structure 12 and the angle deflection structure 13, and is used to bond and fix the narrow viewing angle structure 12 and the angle deflection structure 13. The first adhesive layer 18 may specifically be an optically transparent adhesive film, an optically transparent adhesive tape, or an optically transparent resin, etc.

[0067] In some embodiments, such as Figure 1 As shown, the display panel 10 may also include a cover plate 17 located on the side of the angle-deflecting structure 13 opposite to the narrow-view structure 12. Specifically, the cover plate 17 may be a glass cover plate, and a touch layer or the like may also be provided on the glass cover plate.

[0068] Specifically, the display panel 10 may further include a second adhesive layer 16, which is located on the edge region of the angle deflection structure 13 and can bond and fix the edge region of the cover plate 17 to the edge region of the angle deflection structure 13. The material of the second adhesive layer 16 may include a black light-blocking material to prevent light leakage from the non-display area of ​​the display panel 10.

[0069] In the above embodiments, such as Figure 1 As shown, the display panel 10 may further include an array substrate 14, wherein the array substrate 14 may be located on the side of the plurality of light-emitting units 11 facing away from the narrow viewing angle structure 12. Furthermore, the array substrate 14 may include a control circuit, and the light-emitting units 11 may be electrically connected to the control circuit, wherein the control circuit is capable of controlling the light-emitting units 13 to emit light.

[0070] Specifically, such as Figure 5 As shown, the array substrate 14 may include a substrate, and multiple gate lines, multiple data lines, and multiple pixel regions defined by the gate lines and data lines disposed on the substrate. The multiple pixel regions may include a red pixel region 141, a green pixel region 142, and a blue pixel region 143, etc. The multiple light-emitting units 11 can be fixed to the corresponding pixel regions in the array substrate 14 by soldering, and each of the multiple light-emitting units 11 corresponds one-to-one with each of the multiple pixel regions.

[0071] The display panel of this embodiment includes multiple light-emitting units, a narrow viewing angle structure covering the light-emitting side of the multiple light-emitting units, and an angle deflection structure located on the side of the narrow viewing angle structure opposite to the multiple light-emitting units. The narrow viewing angle structure can selectively emit a first light ray within a first viewing angle range from the light emitted by the multiple light-emitting units, and the angle deflection structure can adjust the first light ray to a second light ray within a second viewing angle range. This provides a display panel with a novel structure for a head-up display in a vehicle, which is beneficial for improving the brightness and response speed of the head-up display in the vehicle.

[0072] Please see Figure 6 , Figure 6 Please also refer to the flowchart illustrating the method for manufacturing the display panel provided in this application embodiment. Figures 1 to 5 , Figures 1 to 5 This is a schematic diagram of the structure during the fabrication process of the display panel provided in this application embodiment. This embodiment uses the formation of display panel 10 as an example to illustrate the fabrication method. The specific process of fabricating display panel 10 is as follows:

[0073] Step S11: Provide multiple light-emitting units 11.

[0074] Specifically, step S11 may include: providing an array substrate 14 and setting a plurality of light-emitting units 11 on the array substrate 14, the array substrate 14 including a control circuit, and the plurality of light-emitting units 11 being electrically connected to the control circuit.

[0075] Furthermore, in specific implementation, a large number of light-emitting units 11 can be transferred to the array substrate 14 to set multiple light-emitting units 11 on the array substrate 14.

[0076] In one specific embodiment, the light-emitting unit 11 can be a Micro-LED. Specifically, multiple Micro-LEDs can be formed on a single-crystal silicon substrate, and then the multiple Micro-LEDs on the single-crystal silicon substrate can be cut to obtain multiple independent Micro-LEDs. Then, each Micro-LED can be transferred to the corresponding area (i.e., the corresponding pixel area) on the array substrate 14 by welding.

[0077] Step S12: Form a narrow viewing angle structure 12, which covers the light-emitting side of multiple light-emitting units 11 and is used to selectively emit the first light ray L1 that is located within the first viewing angle range A from the light emitted by the multiple light-emitting units 11.

[0078] Specifically, step S12 may include: forming a narrow-view structure 12 including a spacer layer 121 and a selective light-emitting layer 122. The spacer layer 121 is located on the light-emitting side of the plurality of light-emitting units 11, and the selective light-emitting layer 122 is located on the side of the spacer layer 121 away from the plurality of light-emitting units 11. The selective light-emitting layer 122 includes a plurality of light-transmitting areas 122a and a light-blocking area 122b located between the light-transmitting areas 122a. The first light ray L1 can be emitted from the plurality of light-transmitting areas 122a.

[0079] Furthermore, in a specific implementation, a selective light-emitting layer 122 can be formed on the transparent substrate 123, and then the transparent substrate 123 on which the selective light-emitting layer 122 is formed can be bonded and fixed to the light-emitting side of the plurality of light-emitting units 11 by using a transparent adhesive layer as a spacer layer 121, with the selective light-emitting layer 122 facing the plurality of light-emitting units 11, so as to obtain the narrow viewing angle structure 12 including the spacer layer 121, the selective light-emitting layer 122 and the transparent substrate 123.

[0080] Step S13: Form an angle deflection structure 13, which is located on the side of the narrow viewing angle structure 12 away from the multiple light-emitting units 11, and is used to adjust the first light ray L1 into a second light ray L2 located within the second viewing angle range B.

[0081] Specifically, step S13 can include: forming an angle deflection structure 13 comprising multiple prisms 131, wherein each prism 131 includes a first surface 131A and a second surface 131B, the first surface 131A being parallel to a second direction, the second surface 131B forming an acute angle with the second direction, the second direction being perpendicular to the narrow-view structure 12, and the first ray L1 entering the angle deflection structure 13 through the narrow-view structure 12 and exiting the angle deflection structure 13 after being refracted by the second surface 131B to obtain the second ray L2.

[0082] Furthermore, in a specific implementation, an angle deflection structure 13 can be provided, and the angle deflection structure 13 can be fixed to the side of the narrow viewing angle structure 12 that is away from the multiple light-emitting units 11 through the first adhesive layer 18.

[0083] In some embodiments, after step S13 described above, the following may also be included:

[0084] Step S14: Form a cover plate 17 on the side of the angle deflection structure 13 that is away from the narrow viewing angle structure 12.

[0085] Specifically, the cover plate 17 can be fixed to the side of the angle deflection structure 13 that is away from the narrow viewing angle structure 12 by means of the second adhesive layer 16.

[0086] It should be noted that the specific structure of the display panel 10 in this embodiment can be referred to the specific implementation method in the above-described embodiment of the display panel, so it will not be repeated here.

[0087] The method for manufacturing a display panel in this embodiment provides multiple light-emitting units and forms a narrow viewing angle structure. The narrow viewing angle structure covers the light-emitting side of the multiple light-emitting units and is used to selectively emit the first light ray within the first viewing angle range emitted by the multiple light-emitting units. Then, an angle deflection structure is formed on the side of the narrow viewing angle structure away from the multiple light-emitting units to adjust the first light ray to a second light ray within the second viewing angle range. This provides a display panel with a novel structure for a head-up display in a vehicle, which is beneficial for improving the brightness and response speed of the head-up display in the vehicle.

[0088] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of the display device provided in the embodiments of this application. Figure 7 As shown, the display device 100 includes a driving circuit and a display panel 101 of any of the above embodiments, and the driving circuit is used to provide a driving voltage to the display panel 101.

[0089] The display panel 101 includes a plurality of light-emitting units, a narrow viewing angle structure covering the light-emitting side of the plurality of light-emitting units, and an angle deflection structure located on the side of the narrow viewing angle structure opposite to the plurality of light-emitting units. The narrow viewing angle structure can selectively emit a first light ray within a first viewing angle range from the light emitted by the plurality of light-emitting units, and the angle deflection structure can adjust the first light ray to a second light ray within a second viewing angle range.

[0090] The display device provided in this application embodiment has the same beneficial effects as the aforementioned display panel due to the presence of the display panel provided in this application embodiment.

[0091] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display panel comprising: Multiple light-emitting units; A narrow viewing angle structure is covered on the light-emitting side of the plurality of light-emitting units, for selectively emitting the first light ray within the first viewing angle range of the light emitted by the plurality of light-emitting units; An angle deflection structure is located on the side of the narrow viewing angle structure away from the plurality of light-emitting units, and is used to adjust the first light ray to a second light ray within the range of the second viewing angle; The narrow viewing angle structure includes a spacer layer and a selective light-emitting layer. The spacer layer is located on the light-emitting side of the plurality of light-emitting units, and the selective light-emitting layer is located on the side of the spacer layer opposite to the plurality of light-emitting units. The selective light-emitting layer includes a plurality of light-transmitting areas and a light-blocking area located between the light-transmitting areas. The first light is emitted from the plurality of light-transmitting areas. The display panel further includes: an array substrate located on the side of the plurality of light-emitting units opposite to the narrow viewing angle structure. The array substrate includes a control circuit, and the light-emitting units are electrically connected to the control circuit. A second black matrix is ​​located between the array substrate and the narrow viewing angle structure and surrounds the periphery of the light-emitting units.

2. The display panel according to claim 1, wherein, The light-emitting unit is a Micro-LED.

3. The display panel according to claim 1, wherein, The centers of the orthogonal projections of the plurality of light-emitting units on the selective light-emitting layer coincide with the centers of the plurality of light-transmitting areas; or, the centers of the orthogonal projections of the plurality of light-emitting units on the selective light-emitting layer are offset by a preset distance relative to the centers of the plurality of light-transmitting areas in a first direction, the first direction being parallel to the selective light-emitting layer.

4. The display panel according to claim 1, wherein, The selective light-emitting layer is a first black matrix with multiple open areas.

5. The display panel according to claim 1, wherein, The angle deflection structure includes multiple prisms, each prism having a first surface and a second surface. The first surface is parallel to a second direction, and the angle between the second surface and the second direction is an acute angle. The second direction is perpendicular to the narrow-view structure. The first light ray enters the angle deflection structure through the narrow-view structure and is refracted by the second surface before exiting the angle deflection structure to obtain the second light ray.

6. A method for manufacturing a display panel, comprising: Provides multiple light-emitting units; A narrow viewing angle structure is formed, which covers the light-emitting side of the plurality of light-emitting units and is used to selectively emit the first light ray that is within the first viewing angle range of the light emitted by the plurality of light-emitting units; An angle deflection structure is formed, which is located on the side of the narrow viewing angle structure away from the plurality of light-emitting units, and is used to adjust the first light ray to a second light ray within the range of the second viewing angle; The method of forming a narrow viewing angle structure specifically includes: forming a narrow viewing angle structure comprising a spacer layer and a selective light-emitting layer, wherein the spacer layer is located on the light-emitting side of the plurality of light-emitting units, the selective light-emitting layer is located on the side of the spacer layer away from the plurality of light-emitting units, and the selective light-emitting layer comprises a plurality of light-transmitting areas and a light-blocking area located between the light-transmitting areas, wherein the first light is emitted from the plurality of light-transmitting areas; the method of manufacturing the display panel further includes: forming an array substrate and a second black matrix, wherein the array substrate is located on the side of the plurality of light-emitting units away from the narrow viewing angle structure, the array substrate includes a control circuit, and the light-emitting units are electrically connected to the control circuit; the second black matrix is ​​located between the array substrate and the narrow viewing angle structure and surrounds the periphery of the light-emitting units.

7. The method for manufacturing a display panel according to claim 6, wherein, The formation of the angle deflection structure specifically includes: An angle deflection structure comprising multiple prisms is formed. Each prism includes a first surface and a second surface. The first surface is parallel to a second direction, and the angle between the second surface and the second direction is an acute angle. The second direction is perpendicular to the narrow-view structure. The first light ray enters the angle deflection structure through the narrow-view structure and exits the angle deflection structure after being refracted by the second surface, thereby obtaining the second light ray.

8. A display device comprising a driving circuit and a display panel, wherein the driving circuit is configured to provide a driving voltage to the display panel, wherein... The display panel includes: Multiple light-emitting units; A narrow viewing angle structure is covered on the light-emitting side of the plurality of light-emitting units, for selectively emitting the first light ray within the first viewing angle range of the light emitted by the plurality of light-emitting units; An angle deflection structure is located on the side of the narrow viewing angle structure away from the plurality of light-emitting units, and is used to adjust the first light ray to a second light ray within the range of the second viewing angle; The narrow viewing angle structure includes a spacer layer and a selective light-emitting layer. The spacer layer is located on the light-emitting side of the plurality of light-emitting units, and the selective light-emitting layer is located on the side of the spacer layer opposite to the plurality of light-emitting units. The selective light-emitting layer includes a plurality of light-transmitting areas and a light-blocking area located between the light-transmitting areas. The first light is emitted from the plurality of light-transmitting areas. The display panel further includes: an array substrate located on the side of the plurality of light-emitting units opposite to the narrow viewing angle structure. The array substrate includes a control circuit, and the light-emitting units are electrically connected to the control circuit. A second black matrix is ​​located between the array substrate and the narrow viewing angle structure and surrounds the periphery of the light-emitting units.

9. The display device according to claim 8, wherein, The light-emitting unit is a Micro-LED.

10. The display device according to claim 8, wherein, The centers of the orthogonal projections of the plurality of light-emitting units on the selective light-emitting layer coincide with the centers of the plurality of light-transmitting areas; or, the centers of the orthogonal projections of the plurality of light-emitting units on the selective light-emitting layer are offset by a preset distance relative to the centers of the plurality of light-transmitting areas in a first direction, the first direction being parallel to the selective light-emitting layer.

11. The display device according to claim 8, wherein, The selective light-emitting layer is a first black matrix with multiple open areas.

12. The display device according to claim 8, wherein, The angle deflection structure includes multiple prisms, each prism having a first surface and a second surface. The first surface is parallel to a second direction, and the angle between the second surface and the second direction is an acute angle. The second direction is perpendicular to the narrow-view structure. The first light ray enters the angle deflection structure through the narrow-view structure and is refracted by the second surface before exiting the angle deflection structure to obtain the second light ray.

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