Display device and manufacturing method thereof

Abstract

The invention discloses a display device and a manufacturing method thereof. The display device comprises a display panel and a lens structure. The display panel comprises a substrate and a plurality of sub-pixels located on the substrate. The lens structure is located on the light emitting side of the display panel, and the lens surface, close to the display panel, of the lens structure is a curved surface. The display panel comprises a first area and a second area surrounding the first area, and the included angle between the light-emitting face of the sub-pixel located in the first area and the optical axis of the lens structure is larger than the included angle between the light-emitting face of the sub-pixel located in the second area and the optical axis. According to the display device provided by the invention, by adjusting the included angles between the light-emitting surfaces of the sub-pixels in different areas in the display panel and the optical axis of the lens structure, the main light emitting angle of the sub-pixels in the display panel can be matched with the main light emitting angle of the lens structure; the optical imaging design freedom degree is increased, the display image quality is improved, the display brightness or chromaticity uniformity is improved, stray light is reduced, and the contrast ratio is improved.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to a display device and a manufacturing method thereof. Background Art

[0002] Currently, the micro-displays required for head-mounted display devices in virtual reality usually use liquid crystal displays. However, in order to meet users' demands for high-definition displays, micro-displays use organic light-emitting diode (OLED) displays with higher pixel densities. Although silicon-based OLEDs have advantages such as high pixel density, high contrast ratio, and wide color gamut, they also have problems such as small preparation size.

[0003] To solve the matching problem between a relatively large optical module and a relatively small display screen, a micro-lens array (Micro-Lens Array, abbreviated as MLA) can be introduced between the two to match the chief ray angle (CRA) of the principal ray exiting from the entrance pupil center of the optical module. Especially when using MLA at a large field of view angle, the light efficiency can be significantly improved, and the consistency of image brightness and chromaticity can be ensured. Summary of the Invention

[0004] Embodiments of the present disclosure provide a display device and a manufacturing method thereof.

[0005] Embodiments of the present disclosure provide a display device, including: a display panel and a lens structure. The display panel includes a substrate and a plurality of sub-pixels located on the substrate; the lens structure is located on the light-emitting side of the display panel, and the lens surface of the lens structure close to the display panel is a curved surface. The display panel includes a first region and a second region surrounding the first region, and the angle between the light-emitting surface of the sub-pixels located in the first region and the optical axis of the lens structure is greater than the angle between the light-emitting surface of the sub-pixels located in the second region and the optical axis.

[0006] For example, according to embodiments of the present disclosure, the principal ray of the sub-pixels located in the first region is parallel to the optical axis of the lens structure, and the angle between the principal ray of the sub-pixels located in the second region and the optical axis is greater than 0 degree and less than or equal to 75 degrees.

[0007] For example, according to embodiments of the present disclosure, the substrate includes a reference plane, and the distance between the center of the light-emitting surface of the sub-pixels in the first region and the reference plane is less than the distance between the center of the light-emitting surface of the sub-pixels in the second region and the reference plane.

[0008] For example, according to embodiments of the present disclosure, the minimum distance between the lens surface and the center of the light-emitting surface of the sub-pixels is 0.2 to 50 millimeters.

[0009] For example, according to an embodiment of the present disclosure, the radius of curvature of the lens surface is -300 to 300 millimeters.

[0010] For example, according to an embodiment of the present disclosure, the portion of the substrate located in the second region is provided with inclined grooves, and the inclined grooves include a groove bottom farthest from the lens structure. The distance between the center of the light-emitting surface of the sub-pixel located in the inclined groove and the plane of the groove bottom parallel to the main surface of the substrate is 20 nanometers to 50 micrometers.

[0011] For example, according to an embodiment of the present disclosure, the main ray exit angle CRA1 of at least some sub-pixels in the display panel and the main ray exit angle CRA0 of the lens structure satisfy the following relational expression: CRA1 = {[tan -1 (H - Z)] / (f + e + T + CRA0)} + {[tan -1 (H / Z)] / (R - f - e - T - CRA0)}. The portion of the substrate located in the second region is provided with inclined grooves, and the inclined grooves include a groove bottom farthest from the lens structure. The distance between the center of the light-emitting surface of the sub-pixel located in the inclined groove and the plane of the groove bottom parallel to the main surface of the substrate is H, the distance between the lens surface and the display surface at the position of the sub-pixel is Z, f represents the focal length of the lens structure, e represents the entrance pupil size, T represents the angle between the main ray exit angle of the sub-pixel and the optical axis of the lens structure, and R represents the radius of curvature of the lens surface.

[0012] For example, according to an embodiment of the present disclosure, the center of the lens surface is closer to the display panel than the edge. In the direction from the center of the display panel to the edge, T of multiple sub-pixels in the second region gradually increases.

[0013] For example, according to an embodiment of the present disclosure, the center of the lens surface is closer to the display panel than the edge. In the direction from the center of the display panel to the edge, H of multiple sub-pixels in the second region gradually increases.

[0014] For example, according to an embodiment of the present disclosure, the second region includes multiple annular sub-regions, the first region includes the center of the display panel, the multiple annular sub-regions are sequentially arranged in the direction from the center to the edge, and T and H of different sub-pixels in the same annular sub-region are the same.

[0015] For example, according to an embodiment of the present disclosure, in the direction from the center to the edge, T and H of sub-pixels in different annular sub-regions gradually increase.

[0016] For example, according to an embodiment of the present disclosure, the incident angle of the principal ray of the light emitted from the light-emitting surface of the sub-pixel in the second region to the lens surface is not greater than 5 degrees.

[0017] For example, according to an embodiment of the present disclosure, the plurality of sub-pixels include red sub-pixels, green sub-pixels, and blue sub-pixels.

[0018] For example, according to an embodiment of the present disclosure, the lens surface includes a spherical surface, an aspherical surface, or a freeform surface.

[0019] For example, according to an embodiment of the present disclosure, each sub-pixel includes a light-emitting diode or an organic light-emitting diode.

[0020] For example, according to an embodiment of the present disclosure, the inclined groove includes an inclined main surface, the sub-pixel includes a light-emitting layer, and the light-emitting layer is disposed on the inclined main surface.

[0021] Another embodiment of the present disclosure provides a manufacturing method of the above display device, including: forming a display panel, where the display panel includes a substrate and a plurality of sub-pixels located on the substrate; disposing a lens structure on the light-emitting side of the display panel, where the lens surface of the lens structure close to the display panel is a curved surface. The display panel includes a first region and a second region surrounding the first region. Forming the display panel includes: forming a plurality of inclined grooves on a side of the second region of the substrate facing the lens structure; forming the sub-pixels in the inclined grooves such that the included angle between the light-emitting surface of the sub-pixels in the first region and the optical axis of the lens structure is greater than the included angle between the light-emitting surface of the sub-pixels in the second region and the optical axis.

[0022] The display device provided by the present disclosure can achieve the matching of the principal ray emission angle of the sub-pixels in the display panel and the principal ray emission angle of the lens structure by adjusting the included angle between the light-emitting surfaces of the sub-pixels in different regions of the display panel and the optical axis of the lens structure, increase the degree of freedom of optical imaging design, improve the display picture quality, improve the display brightness or chromaticity uniformity, reduce stray light, and improve the contrast. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure and do not limit the present disclosure.

[0024] Figure 1 FIG. is a schematic structural diagram of a display device provided according to an embodiment of the present disclosure.

[0025] Figure 2 is Figure 1 a partial cross-sectional structural schematic diagram of the shown display panel.

[0026] Figure 3 is Figure 1 A schematic diagram of a partial planar structure of the display panel shown in an example.

[0027] Figure 4 is Figure 3 A schematic diagram of the tilt angles of sub-pixels in different regions shown.

[0028] Figure 5 is Figure 1 A schematic diagram of sub-pixels in a partial region of the display panel in the display device shown.

[0029] Figure 6 is Figure 1 A schematic diagram of a partial planar structure of the display panel in another example shown.

[0030] Figure 7 A schematic diagram of a partial cross-sectional structure of a display device provided according to an example of an embodiment of the present disclosure.

[0031] Figures 8 to 10 A partial process flow chart of a method for manufacturing a display panel in a display device provided according to an embodiment of the present disclosure. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0033] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The "first", "second", and similar terms used in the present disclosure 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 items appearing before the term cover the elements or items listed after the term and their equivalents, without excluding other elements or items.

[0034] Features such as "parallel", "perpendicular", and "identical" used in the embodiments of the present disclosure include the strictly defined features of "parallel", "perpendicular", "identical", etc., as well as situations with certain errors such as "substantially parallel", "substantially perpendicular", "substantially identical", etc. Considering measurement and errors related to the measurement of specific quantities (e.g., limitations of the measurement system), it means within the acceptable deviation range for a specific value determined by those of ordinary skill in the art. For example, "substantially" can mean within one or more standard deviations, or within 10% or 5% of the value. When the quantity of a component is not specifically indicated in the following text of the embodiments of the present disclosure, it means that the component can be one or more, or can be understood as at least one. "At least one" means one or more, and "a plurality" means at least two.

[0035] In the research, the inventors of the present application found that: to solve the matching problem between an optical module with a relatively large size and a display screen with a relatively small size, a microlens array (MLA) can be introduced therebetween. There are many imperfections in the design and arrangement of the above MLA. For example, when the entrance pupil positions are different, even using the MLA technology may not be able to fully match the different CRA values at different positions of the optical module, which may lead to situations such as inconsistent brightness and chromaticity between the image edge and the image center when the user views the screen, thereby causing adverse reactions such as visual fatigue, dizziness, or discomfort to the user. For example, display screens of different displays have different parameters such as pixel arrangements, so the MLA needs to be adjusted accordingly to achieve the best CRA compensation effect. For example, the CRA matching between the MLA and the display screen may result in inconsistent colors and brightness of the picture, which may cause color deviation or distortion of the displayed image, affecting the user's viewing experience. For example, since the MLA cannot be fully matched with the CRA of the display screen, it may limit the size and other models of the display screen. For example, certain models of display screens may be incompatible with a specific MLA, which may lead to limitations in selection.

[0036] Embodiments of the present disclosure provide a display device and a manufacturing method thereof. The display device includes a display panel and a lens structure. The display panel includes a substrate and a plurality of sub-pixels located on the substrate; the lens structure is located on the light-emitting side of the display panel, and the surface of the lens structure close to the display panel is a curved surface. The display panel includes a first region and a second region surrounding the first region, and the angle between the light-emitting surface of the sub-pixels in the first region and the optical axis of the lens structure is greater than the angle between the light-emitting surface of the sub-pixels in the second region and the optical axis. In the display device provided by the present disclosure, by adjusting the angle between the light-emitting surface of the sub-pixels in different regions of the display panel and the optical axis of the lens structure, it is possible to achieve the matching of the main light ray emission angle of the sub-pixels in the display panel and the main light ray emission angle of the lens structure, increase the degree of freedom of optical imaging design, improve the quality of the display screen, improve the uniformity of display brightness or chromaticity, reduce stray light, and improve the contrast ratio.

[0037] The display device and the manufacturing method thereof provided by the present disclosure will be described below with reference to the accompanying drawings.

[0038] Figure 1 FIG. is a schematic structural diagram of a display device according to an embodiment of the present disclosure. Figure 2 is Figure 1 A partial cross-sectional structural diagram of the shown display panel.

[0039] As Figure 1 and Figure 2 As shown in FIGS. and, the display device includes a display panel 10 and a lens structure 20. The display panel 10 includes a substrate 100 and a plurality of sub-pixels 200 located on the substrate 100; the lens structure 20 is located on the light-emitting side of the display panel 10, and the lens surface 201 of the lens structure 20 close to the display panel 10 is a curved surface 201. For example, the light emitted from the display panel 10 is incident on the entrance pupil 30 after passing through the lens structure 20. For example, the above lens surface 201 of the lens structure 20, such as the curved surface 201, may be the surface on the light-incident side of the lens structure 20. For example, the above lens surface 201 may be the first surface of the lens structure 20, and the lens structure 20 may further include other surfaces, such as the second surface.

[0040] As Figure 1 and Figure 2 As shown in FIGS. and, the display panel 10 includes a first region 101 and a second region 102 surrounding the first region 101, and the angle between the light-emitting surface of the sub-pixels 200 in the first region 101 and the optical axis of the lens structure 20 is greater than the angle between the light-emitting surface of the sub-pixels 200 in the second region 102 and the optical axis of the lens structure 20. For example, the optical axis of the lens structure 20 is parallel to the X direction. The angle between the light-emitting surface and the optical axis refers to an angle not greater than 90 degrees.

[0041] Compared with a display device that sets a microlens array (MLA) between a general display panel and a lens structure to match the principal ray exit angle of the lens structure, the display device provided by the present disclosure can achieve the matching of the principal ray exit angle of the sub-pixels 200 in the display panel 10 and the principal ray exit angle of the lens structure 20 by adjusting the angle between the light exit surface of the sub-pixels 200 in different regions of the display panel 10 and the optical axis of the lens structure 20, thereby increasing the degree of freedom in optical imaging design, improving the quality of the display screen, improving the uniformity of display brightness or chromaticity, reducing stray light, and enhancing the contrast ratio.

[0042] For example, as Figure 1 shown, by adjusting the angle between the light exit surface of the sub-pixels 200 at different positions in the display panel 10 and the optical axis of the lens structure 20, a more flexible matching between the lens structure 20 and the display panel 10 can be achieved, improving the degree of freedom in the design of the combined imaging of the optical structure and the display panel 10.

[0043] For example, as Figure 1 shown, the display panel 10 includes a display surface 1001 on the light exit side of a plurality of sub-pixels 200, such as a display screen, and the optical axis of the lens structure 20 is perpendicular to the display surface 1001. For example, the display surface 1001 can be a plane perpendicular to Figure 1 shown in the X direction. For example, the angle between the light exit surface of the sub-pixels 200 in the first region 101 and the display surface 1001 is smaller than the angle between the light exit surface of the sub-pixels 200 in the second region 102 and the display surface 1001.

[0044] In the display device provided by the present disclosure, by setting the light exit surfaces of the sub-pixels 200 in different regions to have different degrees of inclination with respect to the display surface 1001, it is beneficial to adjust the principal ray exit angle CRA1 of the sub-pixels 200 at different positions of the display panel 10 to match the principal ray exit angle CRA0 of the lens structure 20 at the corresponding positions where the light rays emitted from the sub-pixels 200 at different positions are incident on the lens structure 20.

[0045] In some examples, as Figure 1As shown, the principal ray of the light rays emitted from the light-emitting surface of the sub-pixel 200 in the second region 102 is incident on the lens surface 201 of the lens structure 20, and the incident angle of the curved surface 201 is not greater than 5 degrees. For example, the incident angle of the principal ray of the light rays emitted from the light-emitting surface of the sub-pixel 200 in the second region 102 on the curved surface 201 of the lens structure 20 is not greater than 3 degrees. For example, the incident angle of the principal ray of the light rays emitted from the light-emitting surface of the sub-pixel 200 in the second region 102 on the curved surface 201 of the lens structure 20 is not greater than 2 degrees. For example, the incident angle of the principal ray of the light rays emitted from the light-emitting surface of the sub-pixel 200 in the second region 102 on the curved surface 201 of the lens structure 20 is not greater than 1 degree. For example, the incident angle of the principal ray of the light rays emitted from the light-emitting surface of the sub-pixel 200 in the first region 101 on the curved surface 201 of the lens structure 20 is 0 degree. For example, the principal ray of the light rays emitted from the light-emitting surface of the sub-pixel 200 in the second region 102 is incident on the curved surface 201 of the lens structure 20 substantially perpendicularly. The above-mentioned substantially perpendicular can mean that the angle between the outgoing light ray and the tangent at the position where it is incident on the curved surface can be 88 to 92 degrees, such as 89 to 91 degrees, such as 90 degrees.

[0046] For example, as Figure 1 As shown, the light-emitting surfaces of the sub-pixels 200 located in the second region 102 are all inclined towards the first region 101. For example, the principal rays of the light rays emitted from the light-emitting surfaces of the sub-pixels 200 in the second region 102 are all deflected towards the side close to the optical axis of the lens structure 20.

[0047] By setting the light-emitting surfaces of the sub-pixels 200 in different regions to have different degrees of inclination with respect to the display surface 1001, the principal rays of the sub-pixels 200 in different regions are adjusted to be incident on the lens surface 201 of the lens structure 20, such as the incident angle of the curved surface 201 is 0 degree or close to 0 degree, so as to realize that the principal ray exit angles CRA1 of different sub-pixels 200 of the display panel 10 match the different principal ray exit angles CRA0 at different positions of the lens structure 20.

[0048] In some examples, as Figure 1 As shown, the principal rays of the sub-pixels 200 located in the first region 101 are parallel to the optical axis of the lens structure 20, and the angle between the principal rays of the sub-pixels 200 located in the second region 102 and the optical axis is greater than 0 degree and less than or equal to 75 degrees. For example, the principal rays of the sub-pixels 200 located in the first region 101 are perpendicular to the display surface 1001. For example, the angle between the principal rays of the sub-pixels 200 located in the second region 102 and the normal line perpendicular to the display surface 1001 is greater than 0 degree and less than or equal to 75 degrees. For example, the optical axis of the lens structure 20 passes through the first region 101 of the display panel 10.

[0049] For example, as Figure 1As shown, the angle between the principal ray of the sub-pixel 200 located in the second region 102 and the optical axis is 5 to 70 degrees. For example, the angle between the principal ray of the sub-pixel 200 located in the second region 102 and the optical axis is 2 to 30 degrees. For example, the angle between the principal ray of the sub-pixel 200 located in the second region 102 and the optical axis is 1 to 20 degrees. For example, the angle between the principal ray of the sub-pixel 200 located in the second region 102 and the optical axis is 10 to 45 degrees. For example, the angle between the principal ray of the sub-pixel 200 located in the second region 102 and the optical axis is 15 to 60 degrees. For example, the angle between the principal ray of the sub-pixel 200 located in the second region 102 and the optical axis is 12 to 40 degrees. For example, the angle between the principal ray of the sub-pixel 200 located in the second region 102 and the optical axis is 35 to 50 degrees.

[0050] For example, as Figure 1 shown, the angle between the light-emitting surface of the sub-pixel 200 located in the second region 102 and the display surface 1001 is greater than 0 degree and less than or equal to 75 degrees. For example, the angle between the light-emitting surface of the sub-pixel 200 located in the second region 102 and the display surface 1001 is 5 to 70 degrees. For example, the angle between the light-emitting surface of the sub-pixel 200 located in the second region 102 and the display surface 1001 is 2 to 30 degrees. For example, the angle between the light-emitting surface of the sub-pixel 200 located in the second region 102 and the display surface 1001 is 1 to 20 degrees. For example, the angle between the light-emitting surface of the sub-pixel 200 located in the second region 102 and the display surface 1001 is 10 to 45 degrees. For example, the angle between the light-emitting surface of the sub-pixel 200 located in the second region 102 and the display surface 1001 is 15 to 60 degrees. For example, the angle between the light-emitting surface of the sub-pixel 200 located in the second region 102 and the display surface 1001 is 12 to 40 degrees. For example, the angle between the light-emitting surface of the sub-pixel 200 located in the second region 102 and the display surface 1001 is 35 to 50 degrees. For example, the angle between the light-emitting surface of the sub-pixel 200 located in the second region 102 and the display surface 1001 is 1 to 74 degrees. For example, the angle between the light-emitting surface of the sub-pixel 200 located in the second region 102 and the display surface 1001 is 3 to 73 degrees. For example, the angle between the light-emitting surface of the sub-pixel 200 located in the second region 102 and the display surface 1001 is 6 to 66 degrees. For example, the angle between the light-emitting surface of the sub-pixel 200 located in the second region 102 and the display surface 1001 is 7 to 55 degrees.

[0051] By adjusting the inclination angle between the light-emitting surface of the sub-pixel 200 in the second region 102 and the display surface 1001 to adjust the angle between the principal ray of the sub-pixel 200 in the second region 102 and the optical axis of the lens structure 20, it is beneficial to achieve the matching effect between the CRA1 of the sub-pixel 200 and the CRA0 of the lens structure 20.

[0052] In some examples, as Figure 2As shown, the substrate 100 includes a reference plane 103, and the distance between the center of the light-emitting surface of the sub-pixel 200 in the first region 101 and the reference plane 103 is less than the distance D between the center of the light-emitting surface of the sub-pixel 200 in the second region 102 and the reference plane 103. Figure 2 Schematically shows that the center of the light-emitting surface of the sub-pixel 200 in the first region 101 is flush with the reference plane 103, but is not limited thereto, and the distance between the center of the light-emitting surface of the sub-pixel 200 in the first region 101 and the reference plane 103 of the substrate 100 can be set according to product requirements.

[0053] For example, as Figure 1 and Figure 2 shown, the distance between the center of the light-emitting surface of the sub-pixel 200 in the first region 101 and the display surface 1001 is less than the distance between the center of the light-emitting surface of the sub-pixel 200 in the second region 102 and the display surface 1001. For example, the larger the angle between the light-emitting surface of the sub-pixel 200 and the display surface 1001, the larger the distance between the center of the light-emitting surface of the sub-pixel 200 and the display surface 1001.

[0054] For example, as Figure 2 shown, the reference plane 103 of the substrate 100 can be a surface with an opening, and at least part of the film layer of the sub-pixel 200 is disposed in the opening.

[0055] In some examples, such as Figure 1As shown, the minimum distance Z between the lens surface 201 of the lens structure 20, such as the curved surface 201, and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 is 0.2 to 50 millimeters. For example, the minimum distance Z between the curved surface 201 of the lens structure 20 and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 is 0.23 to 45 millimeters. For example, the minimum distance Z between the curved surface 201 of the lens structure 20 and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 is 0.25 to 40 millimeters. For example, the minimum distance Z between the curved surface 201 of the lens structure 20 and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 is 0.27 to 35 millimeters. For example, the minimum distance Z between the curved surface 201 of the lens structure 20 and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 is 0.28 to 30 millimeters. For example, the minimum distance Z between the curved surface 201 of the lens structure 20 and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 is 0.2 to 5 millimeters. For example, the minimum distance Z between the curved surface 201 of the lens structure 20 and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 can be 0.5 to 3 millimeters. For example, the minimum distance Z between the curved surface 201 of the lens structure 20 and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 can be 0.3 to 4 millimeters. For example, the minimum distance Z between the curved surface 201 of the lens structure 20 and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 can be 0.4 to 3.5 millimeters. For example, the minimum distance Z between the curved surface 201 of the lens structure 20 and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 can be 0.8 to 2 millimeters. For example, the minimum distance Z between the curved surface 201 of the lens structure 20 and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 can be 1 to 4.5 millimeters. For example, the minimum distance Z between the curved surface 201 of the lens structure 20 and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 can be 1.5 to 2.5 millimeters. For example, the minimum distance Z between the curved surface 201 of the lens structure 20 and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 can be 0.35 to 4.8 millimeters. For example, the minimum distance Z between the curved surface 201 of the lens structure 20 and the center of the light-emitting surface of the sub-pixel 200 of the display panel 10 can be 1.2 to 3.7 millimeters.

[0056] In some examples, such as Figure 1 shown, the radius of curvature R of the lens surface 201 of the lens structure 20, such as the curved surface 201, is -300 to 300 millimeters.

[0057] For example, as Figure 1As shown, the lens surface 201 of the lens structure 20, such as the center of the curved surface 201 is closer to the display panel 10 than the edge. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is -280 to -1 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is -250 to -100 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is -240 to -20 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is -200 to -50 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is -220 to -80 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is -180 to -10 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is -170 to -45 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is -120 to -15 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is -100 to -30 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is -150 to -60 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is -90 to -40 mm. For example, the center of the curved surface 201 of the lens structure 20 is farther from the display panel 10 than the edge. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is 10 to 200 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is 20 to 100 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is 50 to 150 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is 80 to 250 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is 45 to 220 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is 60 to 270 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is 120 to 180 mm. For example, the radius of curvature R of the curved surface 201 of the lens structure 20 is 140 to 240 mm.

[0058] In some examples, such as Figure 1 As shown, the lens surface 201 of the lens structure 20, such as the curved surface 201 includes a spherical surface, an aspherical surface or a free-form surface. Figure 1 Schematically shows that the lens structure 20 is a single lens, but not limited thereto, the lens structure 20 may further include two lenses or more lenses.

[0059] The display device provided by the present disclosure can, by setting the tilt angle of the light-emitting surface of sub-pixels 200 in different regions with respect to the optical axis of the lens structure 20, the minimum distance between the center of the light-emitting surface of sub-pixels 200 in different regions and the lens surface 201 of the lens structure 20, and the curvature of the lens surface 201 of the lens structure 20, improve the matching effect between the CRA1 of the sub-pixels 200 and the CRA0 of the lens structure 20 while enabling the light rays emitted from the light-emitting surface of the display panel 10 to basically enter the entrance pupil 30 position after passing through the lens structure 20 and have a large field of view angle.

[0060] In some examples, as Figure 2 shown, the portion of the substrate 100 located in the second region 102 is provided with an inclined groove 110. The inclined groove 110 includes a groove bottom 111 that is farthest from the lens structure 20. The distance H between the center of the light-emitting surface of the sub-pixel 200 located in the inclined groove 110 and the plane parallel to the main surface of the substrate 100 where the groove bottom 111 is located is 20 nanometers to 50 micrometers. For example, the sub-pixels 200 located in the second region 102 are all located in the inclined groove 110 of the substrate 100. Of course, the embodiments of the present disclosure are not limited thereto. Some film layers of the sub-pixels located in the second region may be located inside the inclined groove, and the other part of the film layer may be located outside the inclined groove.

[0061] For example, the distance H may be 20 nanometers to 50 micrometers. For example, the distance H may be 30 nanometers to 100 nanometers. For example, the distance H may be 50 nanometers to 1 micrometer. For example, the distance H may be 60 nanometers to 500 nanometers. For example, the distance H may be 150 nanometers to 300 nanometers. For example, the distance H may be 200 nanometers to 800 nanometers. For example, the distance H may be 5 micrometers to 30 micrometers. For example, the distance H may be 10 micrometers to 20 micrometers. For example, the distance H may be 7 micrometers to 40 micrometers. For example, the distance H may be 22 nanometers to 48 micrometers. For example, the distance H may be 25 nanometers to 45 micrometers.

[0062] For example, as Figure 2 shown, the smaller the angle between the light-emitting surface of the sub-pixel 200 and the optical axis of the lens structure 20, the larger the angle T between the principal ray of the light rays emitted by the sub-pixel 200 and the optical axis, and the larger the distance H between the center of the light-emitting surface of the sub-pixel 200 and the plane parallel to the main surface of the substrate 100 where the groove bottom 111 is located.

[0063] In some examples, as Figure 2 shown, the inclined groove 110 includes an inclined main surface 112. The sub-pixel 200 includes a light-emitting layer 210, and the light-emitting layer 210 is disposed on the inclined main surface 112. For example, the inclined main surface 112 faces the first region 101 so that the light-emitting surface of the sub-pixel 200 is inclined toward the first region 101 side. For example, the light-emitting layer 210 is completely located inside the inclined groove 110.Figure 2 The inclined main surface 112 is schematically shown as a plane, but is not limited thereto. The inclined main surface 112 may be a curved surface or other surface types such as a wavy surface, and can be designed according to product requirements.

[0064] For example, as Figure 2 shown, the substrate 100 may refer to a substrate board, such as a glass substrate or a circuit board. The inclined groove 110 is provided on one side of the substrate board facing the lens structure 20. For example, the substrate 100 may also refer to a substrate board including other film layers, such as an insulating layer, and the inclined groove 110 may be provided in other film layers provided on the substrate board.

[0065] In some examples, as Figure 1 and Figure 2 shown, each sub-pixel 200 includes a light-emitting diode (LED) or an organic light-emitting diode (OLED).

[0066] For example, as Figure 2 shown, an electrode layer 220 is provided between the light-emitting layer 210 and the substrate 100, and the electrode layer 220 is configured to be powered to drive the light-emitting layer 210 to emit light. For example, the sub-pixel 200 may be an organic light-emitting diode, the light-emitting layer 210 may include an organic light-emitting material, and a transparent electrode layer is provided on the side of the light-emitting layer 210 away from the substrate 100, such as a whole-surface transparent electrode layer 220 shared by multiple sub-pixels 200. For example, the transparent electrode layer may include a portion filled in the inclined groove 110 and a portion located between adjacent inclined grooves 110. For example, each sub-pixel 200 further includes a pixel circuit, such as including multiple thin-film transistors and at least one capacitor, and the electrode layers on both sides of the light-emitting layer 210 are electrically connected to the pixel circuit to drive the light-emitting layer 210 to emit light. Of course, other functional layers, such as an electron transport layer, a hole transport layer and other film layers, may also be provided between the light-emitting layer 210 and the electrode layers on both sides thereof. For example, the sub-pixel 200 may be a light-emitting diode, the light-emitting layer 210 may be a single-layer quantum well (SQW), a multi-layer quantum well (MQW) light-emitting layer 210 or a quantum dot light-emitting layer 210, etc., and a transparent electrode layer 220 may be provided on the side of the light-emitting layer 210 away from the substrate 100.

[0067] The sub-pixel 200 provided by at least some embodiments of the present disclosure may be a self-luminous structure, and the self-luminous structure includes a light-emitting layer 210 for emitting light. The light-emitting surface of the sub-pixel 200 may include the surface of the light-emitting layer 210 facing the lens structure 20.

[0068] In some examples, as Figure 1 and Figure 2 shown, the main light ray exit angle CRA1 of at least some sub-pixels 200 in the display panel 10 and the main light ray exit angle CRA0 of the lens structure 20 satisfy the following relational expression (1):

[0069] CRA1 = {[tan -1 (H - Z)] / (f + e + T + CRA0)} + {[tan -1 (H / Z)] / (R - f - e - T - CRA0)},

[0070] Wherein, the distance between the center of the light-emitting surface of the sub-pixel 200 located in the inclined groove 110 and the plane of the groove bottom 111 parallel to the main surface of the substrate 100 is H, the distance between the lens surface 201 of the lens structure 20, such as the curved surface 201 and the center of the light-emitting surface of the sub-pixel 200 is Z, f represents the focal length of the lens structure 20, e represents the size of the entrance pupil 30, T represents the angle between the chief ray exit angle of the sub-pixel 200 and the optical axis of the lens structure 20, and R represents the radius of curvature of the lens surface 201 of the lens structure 20, such as the curved surface 201. The main surface of the above-mentioned substrate 100 may be a surface perpendicular to the X direction, such as the surface away from the lens structure 20. For example, the above-mentioned H may represent the height of the light-emitting surface of the sub-pixel 200, the above-mentioned T may represent the deflection angle of the chief ray of the sub-pixel 200 or the inclination angle of the light-emitting surface, and the above-mentioned Z may represent the distance between the lens surface 201 of the lens structure 20, such as the curved surface 201 and the sub-pixel 200.

[0071] In some examples, such as Figure 1 and Figure 2 shown, the multiple sub-pixels 200 include sub-pixels 200 of different colors, such as including red sub-pixels, green sub-pixels, and blue sub-pixels. For example, the multiple sub-pixels 200 in the second region 102 all include sub-pixels 200 of different colors. For example, the sub-pixels 200 in the first region 101 may include sub-pixels 200 of different colors or may only include sub-pixels of the same color, such as the first region 101 only includes one sub-pixel. For example, the chief ray exit angles CRA1 of the sub-pixels 200 of different colors and the chief ray exit angle CRA0 of the lens structure 20 both satisfy the above-mentioned relational expression (1). For example, the chief rays of different sub-pixels 200 are incident on different positions of the lens surface 201 of the lens structure 20, such as the curved surface 201, then the chief ray exit angles CRA1 of different sub-pixels 200 may correspond to the chief ray exit angles CRA0 at different positions of the lens structure 20.

[0072] For example, such as Figure 1 and Figure 2As shown, the display device can be a virtual reality (VR) display device. For example, the size e of the entrance pupil 30 of the display device refers to the size of the pupil on the human eye side of the optical module, such as the lens structure 20. For example, the position where the entrance pupil 30 is located can be determined by the focal length f of the lens structure 20. The size and position of the entrance pupil 30 are closely related to the matching of the chief ray exit angle CRA1 of the sub-pixel 200 and the chief ray exit angle CRA0 of the lens structure 20. The size and position of the entrance pupil 30 will affect the imaging optical performance of the lens structure 20 and the refraction position of the chief ray in the light rays emitted by the sub-pixel 200. Therefore, the influence of the size and position of the entrance pupil 30 needs to be considered when calculating the value of the chief ray exit angle CRA1 of the sub-pixel 200. For example, the position of the entrance pupil 30 will affect the refraction angle of the chief ray in the light rays emitted by the sub-pixel 200. For example, the closer the entrance pupil 30 is to the lens structure 20, the smaller the refraction angle of the chief ray emitted from the sub-pixel 200 passing through the lens structure 20. For example, the size of the entrance pupil 30 determines the position of the outermost light rays at the position of the entrance pupil 30, such as Figure 1 the positions of the two marginal light rays L1 and L2 in the Y direction as shown. The larger the entrance pupil 30, the larger the included angle between the marginal light rays, and the larger the refraction angle of the corresponding light rays emitted by the sub-pixel 200, which may cause chromatic aberration. Therefore, it is necessary to minimize the included angle between the marginal light rays as much as possible. Of course, the display device provided by the embodiments of the present disclosure is not limited to virtual reality products, and can be other display devices provided with a lens structure and a display panel.

[0073] For example, as Figure 1 and Figure 2 shown, referring to the above relationship (1), the height H of the sub-pixel 200, the distance Z between the sub-pixel 200 and the lens structure 20, and the deflection angle T of the chief ray of the sub-pixel 200 can be adjusted according to the CRA0 of the lens structure 20, the focal length f of the lens structure 20, the lens surface 201 of the lens structure 20, such as the radius of curvature R of the curved surface 201, and the size e of the entrance pupil 30, so as to obtain the best CRA matching effect.

[0074] In the display device provided by the present disclosure, by setting the distance between the sub-pixel 200 and the lens structure 20 at different positions, the height of the sub-pixel 200, and the deflection angle of the chief ray, so as to achieve the matching of the CRA1 of the sub-pixel 200 at different positions and the CRA0 at the corresponding position of the lens structure 20. The refraction angles of the chief rays of different color sub-pixels 200 passing through the lens structure 20 and refracting into the entrance pupil 30 are adjusted, thereby alleviating problems such as color shift and chromatic aberration generated by the display device, and achieving a better color restoration effect and minimizing chromatic aberration.

[0075] In the display device provided by the present disclosure, by adjusting the main light of the sub-pixels 200 at the edge position of the display panel 10 to deflect toward the optical axis side of the lens structure 20, it is beneficial to reduce edge stray light and improve the contrast, brightness, and chromaticity uniformity of the display device.

[0076] Figure 2 Schematically shows that the substrate 100 in the first region 101 is provided with a groove, the main surface of the groove is perpendicular to the optical axis of the lens structure 20, and the groove is not an inclined groove. However, this is not limited thereto. The substrate 100 in the first region 101 may also not be provided with a groove, and film layers such as the light-emitting layer 210 of the sub-pixel 200 may be directly formed on the surface of the substrate 100.

[0077] Figure 3 For Figure 1 Schematic partial planar structure diagram of the shown display panel. Figure 4 For Figure 3 Schematic diagram of the tilt angles of sub-pixels in different regions shown.

[0078] In some examples, as Figure 3 and Figure 4 shown, the second region 102 includes a plurality of annular sub-regions, the first region 101 includes the center of the display panel 10, the plurality of annular sub-regions are sequentially arranged in the direction from the center to the edge, and the Ts of different sub-pixels 200 in the same annular sub-region are the same, and the Hs are the same. Figure 4 Schematically shows one sub-pixel 200 in the first region 101 and two sub-pixels 200 in each annular sub-region in the second region 102. Figure 4 Schematically shows the tilt angles of the sub-pixels 200 in each annular sub-region in the second region 102, without showing the height, and the height change can refer to Figure 2 the height change of the sub-pixels 200 in the second region 102 in

[0079] For example, as Figure 3 and Figure 4As shown, the second region 102 may include three annular sub-regions 1021, 1022, and 1023. Each annular sub-region includes two circles of sub-pixels 200. The annular sub-region 1021 surrounds the first region 101, the annular sub-region 1022 surrounds the annular sub-region 1021, and the annular sub-region 1023 surrounds the annular sub-region 1022. For example, the height and the main light deflection angle of each sub-pixel 200 within the annular sub-region 1021 are the same. For example, the height and the main light deflection angle of each sub-pixel 200 within the annular sub-region 1022 are the same. For example, the height and the main light deflection angle of each sub-pixel 200 within the annular sub-region 1023 are the same. Of course, the embodiments of the present disclosure are not limited to the second region 102 including three annular sub-regions, nor are they limited to the sub-pixels 200 within each annular sub-region being arranged in two concentric rings, and can be set according to product requirements. The embodiments of the present disclosure are not limited to the number of sub-pixels 200 within the first region 101 being four, and can be one, two, or more.

[0080] For example, as Figure 3 and Figure 4 shown, the number of sub-pixels 200 located in the second region 102 is greater than the number of sub-pixels 200 located in the first region 101. For example, the number of sub-pixels 200 included in different annular sub-regions may be different. For example, the number of circles in which the sub-pixels 200 are arranged within different annular sub-regions may be the same or different.

[0081] For example, as Figure 3 shown, the shape of the display surface 1001 may be rectangular, and the shape of the first region 101 may be rectangular, such as square. For example, the outer contour shape of each annular sub-region may be rectangular, such as square.

[0082] In some examples, as Figures 1 to 4 shown, for the lens surface 201 of the lens structure 20, such as the center of the curved surface 201 is closer to the display panel 10 than the edge. In the direction from the center of the display panel 10 to the edge, the T of the multiple sub-pixels 200 within the second region 102 gradually increases, such as having a gradually increasing trend. The above-mentioned gradually increasing trend may include that in the direction from the center of the display panel 10 to the edge, the T of any two adjacent sub-pixels 200 is different and shows a gradually increasing trend; it may also include that in the direction from the center of the display panel 10 to the edge, the T of the sub-pixels 200 in adjacent two annular sub-regions is different and shows a gradually increasing trend, but the T of the sub-pixels 200 within the same annular sub-region is the same.

[0083] In some examples, as Figures 1 to 4 shown, in the direction from the center of the display panel 10 to the edge, the T of the sub-pixels 200 in different annular sub-regions gradually increases. For example, the deflection angle T of the main light of the sub-pixels 200 in the annular sub-region farther from the first region 101 is larger.

[0084] For example, as Figure 4 shown, for the lens surface 201 of the lens structure 20, such as the curved surface 201, it can be a spherical surface. The height of the sub-pixels 200 in the same annular sub-region and the deflection angle of the principal ray can be symmetrically distributed with respect to the optical axis of the lens structure 20. Of course, the embodiments of the present disclosure are not limited thereto. When the curved surface 201 of the lens structure 20 is an aspherical surface or a free-form surface, the height of the sub-pixels 200 in the same annular sub-region and the deflection angle of the principal ray need to be set according to the distance between the sub-pixels 200 and the curved surface 201.

[0085] Figure 5 is Figure 1 a schematic diagram of sub-pixels in a partial region of the display panel in the shown display device. Figure 5 Schematically shows that Ts of two adjacent sub-pixels 200 are different and Hs are different, but not limited thereto. Figure 5 The two adjacent sub-pixels 200 shown can also represent sub-pixels 200 in two adjacent annular sub-regions.

[0086] In some examples, as Figure 1 and Figure 5 shown, for the lens surface 201, such as the center of the curved surface 201 is closer to the display panel 10 than the edge. In the direction from the center of the display panel 10 to the edge, the Hs of multiple sub-pixels 200 in the second region 102 gradually increase, such as having a gradually increasing trend. The above-mentioned gradually increasing trend can include that in the direction from the center of the display panel 10 to the edge, the Hs of any two adjacent sub-pixels 200 are different and show a gradually increasing trend; it can also include that in the direction from the center of the display panel 10 to the edge, the Hs of sub-pixels 200 in two adjacent annular sub-regions are different and show a gradually increasing trend, but the Hs of sub-pixels 200 in the same annular sub-region are the same.

[0087] In some examples, taking Figure 5 each sub-pixel 200 shown representing a sub-pixel 200 in an annular sub-region as an example, in the direction from the center to the edge, the Ts of sub-pixels 200 in different annular sub-regions gradually increase, and the Hs gradually increase. For example, H3 is greater than H2, and H2 is greater than H1. For example, T3 is greater than T2, and T2 is greater than T1.

[0088] Figure 6 is Figure 1 a schematic diagram of the partial planar structure of the display panel in another example. For example, Figure 6 the difference between the shown display panel and Figure 3 the shown display panel lies in the arrangement shape of the sub-pixels 200. For example, as Figure 6As shown, the sub-pixels 200 can be arranged in a circular shape. For example, the display surface of the display panel 10 can be circular. For example, the shape of the first region 101 can be circular. For example, the shape of the second region 102 can be an annular shape. For example, the annular sub-regions 1021, 1022, and 1023 included in the second region 102 can all be annular.

[0089] Figure 7 Schematic diagram of a partial cross-sectional structure of a display device provided as an example according to an embodiment of the present disclosure.

[0090] For example, as Figure 7 shown, a color filter layer 300 is further provided on the light-emitting side of the sub-pixels 200. For example, the color filter layer 300 can include a red color filter, a green color filter, and a blue color filter. For example, a black light-shielding structure can be provided between different color color filters. For example, each sub-pixel 200 can be a sub-pixel 200 that emits white light. After the white light passes through the red color filter, red light is emitted. After the white light passes through the green color filter, green light is emitted. After the white light passes through the blue color filter, blue light is emitted. For example, multiple sub-pixels 200 can include a blue sub-pixel that emits blue light, a green sub-pixel that emits green light, and a red sub-pixel that emits red light. A blue color filter is provided on the light-emitting side of the blue sub-pixel, a green color filter is provided on the light-emitting side of the green sub-pixel, and a red color filter is provided on the light-emitting side of the red sub-pixel. By providing the color filter layer 300, crosstalk between the light emitted by different color sub-pixels 200 can be reduced.

[0091] For example, as Figure 1As shown, the lens structure 20 can be a structure in a catadioptric optical path (Pancake). For example, when the lens structure 20 is a single lens, antireflection and reflection polarizing films are respectively disposed on two surfaces of the lens. The antireflection film is located on the side of the lens close to the display panel 10, and the reflection polarizing film is located on the side of the lens away from the display panel 10. A phase retardation film is disposed between the antireflection film and the reflection polarizing film, and a linear polarizing film is disposed on the side of the reflection polarizing film away from the display panel 10. The principle of the folded optical path is as follows: A wave plate can be disposed on the light-emitting side of the display panel 10. The image light emitted from the display panel 10 is converted into right-handed circularly polarized light after passing through the wave plate, and the polarization state of the right-handed circularly polarized light remains unchanged after passing through the antireflection film by transmission. The right-handed circularly polarized light reaches the phase retardation film, and the right-handed circularly polarized light incident on the phase retardation film is converted into p-linearly polarized light. The p-linearly polarized light is reflected back to the phase retardation film by the reflection polarizing layer, and the first reflection occurs here. Then, the p-linearly polarized light is converted into right-handed circularly polarized light after passing through the phase retardation film. The right-handed circularly polarized light reaches the antireflection film and is reflected at the antireflection film, and the second reflection occurs here. Due to the half-wave loss, the reflected light changes from right-handed circularly polarized light to left-handed circularly polarized light. The left-handed circularly polarized light is converted into s-linearly polarized light through the phase retardation film, and then the s-linearly polarized light is transmitted through the reflection polarizing layer and the linear polarizing film and then shoots towards the human eye. Of course, the embodiments of the present disclosure are not limited to the lens structure 20 being a single lens, and can also be structures such as double lenses, triple lenses, and quadruple lenses, which can be set according to product requirements.

[0092] Figures 8 to 10 It is a partial process flow chart of a manufacturing method of a display panel in a display device provided according to an embodiment of the present disclosure.

[0093] Another embodiment of the present disclosure provides a manufacturing method of manufacturing the above display device, including forming Figure 1 the shown display panel 10 and disposing a lens structure 20 on the light-emitting side of the display panel 10. The display panel 10 includes a substrate 100 and a plurality of sub-pixels 200 located on the substrate 100. The display panel 10 includes a first region 101 and a second region 102 surrounding the first region 101. The surface of the lens structure 20 close to the display panel 10 is a curved surface 201. Forming the display panel 10 includes: forming a plurality of inclined grooves 110 on the side of the second region 102 of the substrate 100 facing the lens structure 20; forming sub-pixels 200 in the inclined grooves 110 so that the included angle between the light-emitting surface of the sub-pixels 200 located in the first region 101 and the optical axis of the lens structure 20 is greater than the included angle between the light-emitting surface of the sub-pixels 200 located in the second region 102 and the optical axis.

[0094] For example, as Figure 8 shown, a substrate material layer 100-1 is provided. For example, the substrate material layer 100-1 can be a substrate or other film layers disposed on the substrate, such as an insulating layer.

[0095] For example, as Figure 9 shown, a mask is coated on the substrate material layer and exposed and etched to form an inclined groove 110 in the second region 102. For example, the inclined groove 110 includes an inclined main surface 112. For example, when a groove is provided in the first region 101, the groove in the first region 101 and the inclined groove 110 in the second region 102 can be formed in the same step patterning process.

[0096] For example, as Figure 10 shown, an electrode layer 220 and a light-emitting layer 210 of the sub-pixel 200 are sequentially patterned on the substrate 100 formed with the inclined groove 110. For example, the electrode layer 220 and the light-emitting layer 210 of the sub-pixel 200 are formed on the inclined main surface 112 of the inclined groove 110. The steps after forming the light-emitting layer 210 are not shown in the present disclosure and can be made with reference to the existing process.

[0097] In the display device with an inclined groove manufactured by the manufacturing method provided by the embodiment of the present disclosure, by designing the inclination angle of the inclined main surface in the inclined groove, the inclination angle of the light-emitting layer of the sub-pixel formed in the inclined groove can be adjusted, and further the included angle between the light-emitting surface of the sub-pixel in different regions of the display panel and the optical axis of the lens structure can be adjusted, so that the main light emission angle of the sub-pixel in the display panel can be matched with the main light emission angle of the lens structure.

[0098] The following points need to be noted:

[0099] (1) In the accompanying drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are involved, and other structures can refer to the general design.

[0100] (2) Without conflict, the features in the same embodiment and different embodiments of the present disclosure can be combined with each other.

[0101] The above description is only an exemplary implementation manner of the present disclosure and is not used to limit the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A display device, comprising: a display panel including a substrate and a plurality of sub-pixels located on the substrate; a lens structure located on the light-emitting side of the display panel, wherein a lens surface of the lens structure close to the display panel is a curved surface, wherein the display panel includes a first region and a second region surrounding the first region, and an angle between a light-emitting surface of a sub-pixel located in the first region and an optical axis of the lens structure is greater than an angle between a light-emitting surface of a sub-pixel located in the second region and the optical axis.

2. The display device according to claim 1, wherein, a principal ray of the sub-pixel located in the first region is parallel to the optical axis of the lens structure, and an angle between a principal ray of the sub-pixel located in the second region and the optical axis is greater than 0 degree and less than or equal to 75 degrees.

3. The display device according to claim 2, wherein, the substrate includes a reference plane, and a distance between a center of the light-emitting surface of the sub-pixel in the first region and the reference plane is less than a distance between a center of the light-emitting surface of the sub-pixel in the second region and the reference plane.

4. The display device according to any one of claims 1-3, wherein, a minimum distance between the lens surface and a center of the light-emitting surface of the sub-pixel is 0.2 to 50 millimeters.

5. The display device according to any one of claims 1-3, wherein, a radius of curvature of the lens surface is -300 to 300 millimeters.

6. The display device according to any one of claims 1-3, wherein, a part of the substrate located in the second region is provided with an inclined groove, the inclined groove includes a groove bottom farthest from the lens structure, and a distance between a center of the light-emitting surface of the sub-pixel located in the inclined groove and a plane parallel to a main surface of the substrate where the groove bottom is located is 20 nanometers to 50 micrometers.

7. The display device according to any one of claims 1-3, wherein, a main ray exit angle CRA1 of at least some sub-pixels in the display panel and a main ray exit angle CRA0 of the lens structure satisfy the following relationship: CRA1 = {[tan -1 (H - Z)] / (f + e + T + CRA0)} + {[tan -1 (H / Z)] / (R - f - e - T - CRA0)}, wherein a part of the substrate located in the second region is provided with an inclined groove, the inclined groove includes a groove bottom farthest from the lens structure, a distance between a center of the light-emitting surface of the sub-pixel located in the inclined groove and a plane parallel to a main surface of the substrate where the groove bottom is located is H, a distance between the lens surface and a display surface at the position of the sub-pixel is Z, f represents a focal length of the lens structure, e represents an entrance pupil size, T represents an angle between a main ray of the sub-pixel and the optical axis of the lens structure, and R represents a radius of curvature of the lens surface.

8. The display device according to claim 7, wherein, a center of the lens surface is closer to the display panel than an edge, and in a direction from the center of the display panel to the edge, T of a plurality of sub-pixels in the second region gradually increases.

9. The display device according to claim 7, wherein, The center of the lens surface is closer to the display panel than the edge. In the direction from the center of the display panel to the edge, the H of the multiple sub-pixels in the second region gradually increases.

10. The display device according to claim 7, wherein, the second region includes a plurality of annular sub-regions, the first region includes the center of the display panel, the plurality of annular sub-regions are sequentially arranged in the direction from the center to the edge, and the Ts of different sub-pixels in the same annular sub-region are the same, and the Hs are the same.

11. The display device according to claim 10, wherein, in the direction from the center to the edge, the Ts of the sub-pixels in different annular sub-regions gradually increase, and the Hs gradually increase.

12. The display device according to any one of claims 1-3, wherein, the incident angle of the principal ray of the light emitted from the light-emitting surface of the sub-pixels in the second region incident on the lens surface is not greater than 5 degrees.

13. The display device according to any one of claims 1-3, wherein, the multiple sub-pixels include red sub-pixels, green sub-pixels and blue sub-pixels.

14. The display device according to any one of claims 1-3, wherein, the lens surface includes a spherical surface, an aspherical surface or a free-form surface.

15. The display device according to any one of claims 1-3, wherein, each sub-pixel includes a light-emitting diode or an organic light-emitting diode.

16. The display device according to claim 6, wherein, the inclined groove includes an inclined main surface, the sub-pixel includes a light-emitting layer, and the light-emitting layer is disposed on the inclined main surface.

17. A manufacturing method of a display device, comprising: forming a display panel, wherein the display panel includes a substrate and a plurality of sub-pixels located on the substrate; arranging a lens structure on the light-emitting side of the display panel, wherein the lens surface of the lens structure close to the display panel is a curved surface, wherein the display panel includes a first region and a second region surrounding the first region, and forming the display panel includes: forming a plurality of inclined grooves on one side of the second region of the substrate facing the lens structure; forming the sub-pixels in the inclined grooves so that the included angle between the light-emitting surface of the sub-pixels in the first region and the optical axis of the lens structure is greater than the included angle between the light-emitting surface of the sub-pixels in the second region and the optical axis.

Images