Display panel and display device

Abstract

The present invention discloses a display panel and a display device, relating to the field of display technology. The display panel includes a display area and a non-display area surrounding the display area, wherein the display area includes a first display area and a second display area. The display panel includes: a substrate; an array layer; a light-emitting structure layer, wherein the light-emitting structure layer includes a plurality of sub-pixels; the second display area includes an optical structure layer; the optical structure layer includes a dimming structure; the dimming structure includes a total reflection structure. In the second display area, a first light ray emitted from the optical structure layer undergoes at least one total reflection after passing through the total reflection structure, and is emitted from a light-emitting surface of the display panel as a second light ray. The angle formed between the first light ray and the normal to the light-emitting surface of the display panel is smaller than the angle formed between the second light ray and the normal to the light-emitting surface of the display panel. The present invention solves the problem of low brightness on the side of a display device in the prior art.

Description

[0001] This application is a divisional application with the application date of June 28, 2020, application number 202010599907.X, and the invention name is "Display panel and display device". Technical Field

[0002] The present invention relates to the field of display technology, and more particularly, to a display panel and a display device. Background Art

[0003] Organic Light-Emitting Diode (OLED) displays, as current-type light-emitting devices, have been increasingly used in high-performance displays. They offer excellent properties such as self-luminescence, no need for a backlight, a wide color gamut, high contrast, thinness, wide viewing angle, fast response speed, compatibility with flexible panels, a wide operating temperature range, and relatively simple structure and manufacturing processes. OLED displays are also increasingly being used in mobile phone displays.

[0004] In existing OLED displays, the light emitted on the left and right sides of the screen is actually wide-angle light, and the brightness of the wide-angle light in the OLED display is only about 20% of the brightness of the normal-angle light. Therefore, the brightness of the light emitted on the left and right sides of the screen will be lower, affecting the user's visual experience. Summary of the Invention

[0005] In view of this, the present invention provides a display panel and a display device to solve the problem of low brightness at the side of the display device in the prior art.

[0006] In a first aspect, the present invention provides a display panel, which includes a display area and a non-display area surrounding the display area, the display area including a first display area and a second display area, the second display area being located on a side of the first display area close to the non-display area; the display panel includes: a base substrate; an array layer being located on one side of the base substrate; a light-emitting structure layer being located on a side of the array layer away from the base substrate, the light-emitting structure layer including a plurality of sub-pixels; the second display area including an optical structure layer, the optical structure layer being located on a side of the light-emitting structure layer away from the base substrate; the optical structure layer including a dimming structure, in the second display area, the dimming structure is arranged corresponding to the sub-pixels in a direction perpendicular to a light-emitting surface of the display panel; the dimming structure including a total reflection structure, in the second display area, a first light emitted from the optical structure layer undergoes at least one total reflection after passing through the total reflection structure, and is emitted from the light-emitting surface of the display panel as a second light, the angle formed between the first light and the normal to the light-emitting surface of the display panel is smaller than the angle formed between the second light and the normal to the light-emitting surface of the display panel.

[0007] In a second aspect, the present invention further provides a display device, comprising the display panel provided by the present invention.

[0008] Compared with the prior art, the display panel and display device provided by the present invention achieve at least the following beneficial effects:

[0009] The display panel provided by the present invention includes a display area and a non-display area surrounding the display area, wherein the display area includes a first display area and a second display area, and the second display area is located on the side of the first display area close to the non-display area. The display panel includes a base substrate; an array layer is located on one side of the base substrate; a light-emitting structure layer is located on the side of the array layer away from the base substrate, and the light-emitting structure layer includes a plurality of sub-pixels. The second display area in the display panel includes an optical structure layer, and the optical structure layer is located on the side of the light-emitting structure layer away from the base substrate; the optical structure layer includes a dimming structure, and in the second display area, in a direction perpendicular to the light-emitting surface of the display panel, the dimming structure is arranged corresponding to the sub-pixels, that is, there is a dimming structure corresponding to the sub-pixels in the second display area. The dimming structure includes a total reflection structure, and in the second display area, the first outgoing light emitted from the optical structure layer undergoes at least one total reflection after passing through the total reflection structure, and is emitted from the light-emitting surface of the display panel as the second outgoing light, and the angle formed by the first outgoing light and the normal to the light-emitting surface of the display panel is smaller than the angle formed by the second outgoing light and the normal to the light-emitting surface of the display panel. When a user views the display panel at an angle equivalent to a normal viewing angle directly above the first display area of ​​the display panel, the light originally having a small viewing angle in the second display area is converted into light having a large viewing angle and emitted from the light-emitting surface of the display panel through the setting of the total reflection structure, so that the amount of light with a large viewing angle in the second display area is increased, thereby enhancing the brightness of the light output at a large viewing angle in the second display area, reducing the difference in the brightness of the light output between the first display area and the second display area, and improving the display quality of the display panel.

[0010] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time.

[0011] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0013] Figure 1 This is a schematic diagram of the planar structure of a display panel provided by the present invention;

[0014] Figure 2 yes Figure 1 A schematic structural diagram of the display panel as viewed from the side along direction A;

[0015] Figure 3 yes Figure 2 A schematic diagram of a partially enlarged structure of the middle B part;

[0016] Figure 4 yes Figure 2 Another partial enlarged structural diagram of part B in the middle;

[0017] Figure 5 yes Figure 2 Another partial enlarged structural diagram of the middle B part;

[0018] Figure 6 yes Figure 2 Another partial enlarged structural diagram of the middle B part;

[0019] Figure 7 yes Figure 2 Another partial enlarged structural diagram of the middle B part;

[0020] Figure 8 yes Figure 1 Another schematic structural diagram of the display panel as viewed from the side along direction A;

[0021] Figure 9 It is a schematic diagram of the planar structure of a display device provided by the present invention. DETAILED DESCRIPTION

[0022] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0023] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0024] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0025] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0026] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0027] Figure 1 is a schematic diagram of a planar structure of a display panel provided by the present invention, Figure 2yes Figure 1 A schematic structural diagram of the display panel viewed from the side along direction A, Figure 3 yes Figure 2 A partial enlarged structural diagram of the middle B part (in order to clearly illustrate the technical solution of this embodiment, Figure 3 The local enlarged diagram is illustrated by taking the panel structure corresponding to a sub-pixel 301 as an example), refer to Figure 1-Figure 3 This embodiment provides a display panel, including a display area AA and a non-display area NA surrounding the display area AA. The display area AA includes a first display area AA1 and a second display area AA2. The second display area AA2 is located on a side of the first display area AA1 close to the non-display area NA. The display panel includes:

[0028] Base substrate 10;

[0029] The array layer 20 is located on one side of the base substrate 10;

[0030] The light emitting structure layer 30 is located on a side of the array layer 20 away from the base substrate 10 . The light emitting structure layer 30 includes a plurality of sub-pixels 301 .

[0031] The second display area AA2 includes an optical structure layer 40 , which is located on a side of the light emitting structure layer 30 away from the base substrate 10 ;

[0032] The optical structure layer 40 includes a dimming structure 41. In the second display area AA2, the dimming structure 41 is arranged corresponding to the sub-pixel 301 in the direction Z perpendicular to the light emitting surface of the display panel.

[0033] The dimming structure 41 includes a total reflection structure 42. In the second display area AA2, the first output light L1 emitted from the optical structure layer 30 passes through the total reflection structure 42, undergoes at least one total reflection, and is emitted from the light-emitting surface of the display panel as the second output light L2. The angle formed by the first output light L1 and the normal F11 of the light-emitting surface of the display panel is smaller than the angle formed by the second output light L2 and the normal F12 of the light-emitting surface of the display panel.

[0034] For details, please refer to Figure 1-Figure 3 The display panel provided in this embodiment includes a display area AA and a non-display area NA surrounding the display area AA. The display area AA includes a first display area AA1 and a second display area AA2. The second display area AA2 is located on the side of the first display area AA1 close to the non-display area NA. Figure 1 and Figure 2 It is exemplarily shown in FIG that the display panel includes two second display areas AA2 . Optionally, the number of the second display areas AA2 may be other values, which is not specifically limited in this embodiment.

[0035] The display panel of this embodiment includes a base substrate 10; an array layer 20 located on one side of the base substrate 10; a light-emitting structure layer 30 located on a side of the array layer 20 away from the base substrate 10. The light-emitting structure layer 30 includes a plurality of sub-pixels 301. Optionally, the array layer 20 may include a plurality of sub-pixel control units for controlling whether the sub-pixels 301 of the light-emitting structure layer 30 emit light. Optionally, a pixel definition layer 50 may be provided on one side of the base substrate 10. The pixel definition layer 50 includes openings 501 and flat portions 502 between the openings 501. The pixel definition layer 50 is used to define the location of each sub-pixel 301 of the light-emitting structure layer 30. The sub-pixels 301 are located within the openings 501. The display panel may also include an insulating layer between the conductive film layers for forming the sub-pixel control units (not shown in the figure). The display panel of this embodiment may also include a cover plate, optical adhesive, and a thin film encapsulation layer (not shown in the figure), which will not be described in detail herein.

[0036] The second display area AA2 in the display panel includes an optical structure layer 40, which is located on the side of the light-emitting structure layer 30 away from the base substrate 10; the optical structure layer 40 includes a dimming structure 41. In the second display area AA2, in the direction Z perpendicular to the light-emitting surface of the display panel, the dimming structure 41 is arranged corresponding to the sub-pixel 301, that is, there is a sub-pixel 301 in the second display area AA2 and the dimming structure 41 is arranged correspondingly. In the direction Z perpendicular to the light-emitting surface of the display panel, the vertical projection of the dimming structure 41 on the light-emitting surface of the display panel and the vertical projection of the flat portion 502 defining the corresponding sub-pixel on the light-emitting surface of the display panel at least partially overlap. The dimming structure 41 includes a total reflection structure 42. In the second display area AA2, the first light L1 emitted from the optical structure layer 30 undergoes at least one total reflection after passing through the total reflection structure 42, and is emitted from the light-emitting surface of the display panel as the second light L2. The angle formed by the first light L1 and the normal F11 of the light-emitting surface of the display panel is smaller than the angle formed by the second light L2 and the normal F12 of the light-emitting surface of the display panel. Assuming that the user's viewing angle is Figure 2 At the R position in the image (equivalent to the human eye), that is, when the user is directly above the first display area AA1 of the display panel and views the display panel at an angle equivalent to a normal viewing angle, the light originally having a small viewing angle in the second display area AA2 is converted into light having a large viewing angle and emitted from the light-emitting surface of the display panel through the setting of the total reflection structure 42, so that the amount of light with a large viewing angle in the second display area AA2 is increased, thereby enhancing the brightness of the light emitted at a large viewing angle in the second display area AA2, reducing the difference in the brightness of the light emitted between the first display area AA1 and the second display area AA2, and improving the display quality of the display panel.

[0037] Continue to refer Figure 1-Figure 3, optionally, the optical structure layer 40 includes a first optical structure layer 43 and a second optical structure layer 44, and the second optical structure layer 44 covers the first optical structure layer 43; wherein the refractive index of the first optical structure layer 43 is greater than the refractive index of the second optical structure layer 44;

[0038] The total reflection structure 42 is a first interface 421 between the first optical structure layer 43 and the second optical structure layer 44 . The first interface 421 is a first arc surface 422 that is concave toward the light emitting structure layer 30 .

[0039] Specifically, due to Figure 3 It is a two-dimensional view, so the first arc surface 422 is Figure 3 As indicated by lines in the figure, because the refractive index of the first optical structure layer 43 is greater than the refractive index of the second optical structure layer 44, the first light ray L1 emitted from the sub-pixel 301 is totally reflected at the first curved surface 422. The totally reflected light ray is further refracted at the interface 422' between the first optical structure layer 43 and the second optical structure layer 44 to be emitted from the light-emitting surface of the display panel as the second light ray L2. This makes the angle formed between the second light ray L2 and the normal F12 of the light-emitting surface of the display panel greater than the angle formed between the first light ray L1 and the normal F11 of the light-emitting surface of the display panel.

[0040] It should be noted that the first curved surface 422 is a total reflection functional surface. When the first light ray L1 emitted from the light-emitting structure layer 30 is incident on the first curved surface 422, if the incident angle is relatively large, or even greater than the total reflection angle, most or all of the first light ray L1 is totally reflected at the first curved surface 422, causing the angle of total reflection at which it ultimately emerges from the light-emitting surface of the display panel to change. The total reflection angle here refers to the incident angle η corresponding to a 90-degree refraction angle at the first curved surface 422 when the first light ray L1 is refracted from the first optical structure layer 43 to the second optical structure layer 44, and sinη = n2 / n1, where n1 is the refractive index of the first optical structure layer 43, n2 is the refractive index of the second optical structure layer 44, and n1 is greater than n2.

[0041] Figure 4 yes Figure 2 Another partially enlarged structural diagram of the middle B part (in order to clearly illustrate the technical solution of this embodiment, Figure 4 The local enlarged diagram is illustrated by taking the panel structure corresponding to a sub-pixel 301 as an example), refer to Figure 1 、 Figure 2 and Figure 4 Optionally, the dimming structure 41 further includes a refractive structure 45. In the same dimming structure 41, the refractive structure 45 is located on a side of the total reflection structure 42 away from the first display area AA1.

[0042] In the second display area AA2, the third output light L3 emitted from the optical structure layer 40 passes through the refractive structure 45 and is emitted from the light-emitting surface of the display panel as the fourth output light L4. The angle formed by the fourth output light L4 and the normal F13 of the light-emitting surface of the display panel is greater than the angle formed by the third output light L3 and the normal F14 of the light-emitting surface of the display panel.

[0043] For details, please refer to Figure 1 、 Figure 2 and Figure 4 The dimming structure 41 also includes a refractive structure 45. In the same dimming structure 41, the refractive structure 45 is located on the side of the total reflection structure 42 away from the first display area AA1. The vertical projection of the dimming structure 41 on the light-emitting surface of the display panel and the vertical projection of the corresponding sub-pixel 301 on the light-emitting surface of the display panel at least partially overlap. In the second display area AA2, the third outgoing light L3 emitted by the sub-pixel 301 passes through the refractive structure 45 and is emitted from the light-emitting surface of the display panel as the fourth outgoing light L4. The angle formed by the fourth outgoing light L4 and the normal F13 of the light-emitting surface of the display panel is greater than the angle formed by the third outgoing light L3 and the normal F14 of the light-emitting surface of the display panel. Assuming that the user's viewing angle is Figure 2 At the R position in the image (equivalent to the human eye), that is, when the user is directly above the first display area AA1 of the display panel and views the display panel at an angle equivalent to a normal viewing angle, the amount of light at a large viewing angle in the second display area AA2 is further increased by the setting of the refractive structure 45, thereby further enhancing the brightness of the light at a large viewing angle in the second display area AA2, reducing the difference in brightness between the first display area AA1 and the second display area AA2, and improving the display quality of the display panel.

[0044] The refractive structure 45 is located on the side of the total reflection structure 42 away from the first display area AA1. The total reflection structure 42 causes the light of the corresponding sub-pixel 301 on the side close to the first display area AA1 to be deflected toward the direction close to the first display area AA1. The refractive structure 45 causes the light of the corresponding sub-pixel 301 on the side away from the first display area AA1 to be deflected toward the direction close to the first display area AA1. When the user views the display panel at an angle equivalent to a normal viewing angle directly above the first display area AA1 of the display panel, the uniformity of the light output brightness at various locations in the second display area AA2 is improved, thereby further improving the display quality of the display panel.

[0045] Continue to refer Figure 1 、 Figure 2 and Figure 4 Optionally, the refractive structure 45 is a second interface 451 between the first optical structure layer 43 and the second optical structure layer 44, and the second interface 451 is a second arc surface 452 concave toward the light-emitting structure layer.

[0046] Specifically, due to Figure 4 It is a two-dimensional view, so the second arc surface 452 is Figure 4 Because the refractive index of the first optical structure layer 43 is greater than the refractive index of the second optical structure layer 44, the third light ray L3 emitted from the sub-pixel 301 is refracted at the second curved surface 452 and emitted from the light-emitting surface of the display panel as the fourth light ray L4. This makes the angle formed by the fourth light ray L4 and the normal F13 of the light-emitting surface of the display panel greater than the angle formed by the third light ray L3 and the normal F14 of the light-emitting surface of the display panel.

[0047] Continue to refer Figure 1 、 Figure 2 and Figure 4 , optionally, the maximum curvature radius of the first arc surface 422 is smaller than the minimum curvature radius of the second arc surface 452 .

[0048] Specifically, the maximum radius of curvature of the first curved surface 422 is smaller than the minimum radius of curvature of the second curved surface 452, which facilitates total internal reflection of light emitted from the first optical structure layer 43 upon entering the first curved surface 422. Optionally, the first curved surface 422 may have a smaller radius of curvature as it approaches the first display area AA1. This allows light emitted from the sub-pixel 301 farther from the first display area AA1 to experience a greater angle of deflection toward the first display area AA1 after passing through the first curved surface 422. Optionally, the second curved surface 452 may have a smaller radius of curvature as it approaches the first display area AA1. This allows light emitted from the sub-pixel 301 farther from the first display area AA1 to experience a greater angle of deflection toward the first display area AA1 after passing through the second curved surface 452. This improves the uniformity of light output brightness across the second display area AA2 when a user views the display panel directly above the first display area AA1 at an angle equivalent to a normal viewing angle, further enhancing the display quality of the display panel.

[0049] Figure 5 yes Figure 2 Another partially enlarged structural diagram of the middle B part (in order to clearly illustrate the technical solution of this embodiment, Figure 5 The local enlarged diagram is illustrated by taking the panel structure corresponding to a sub-pixel 301 as an example), refer to Figure 1 、 Figure 2 and Figure 5 Optionally, the display panel includes a first cross section CC', the first cross section CC' passes through the dimming structure 41 and the sub-pixel 301 corresponding thereto, and the first cross section CC' is perpendicular to the light emitting surface of the display panel and parallel to the direction of the second display area AA2 pointing to the first display area AA1;

[0050] The intersection of the first section CC' and the first arc surface 422 is a first arc line 423. The first arc line 423 includes a first endpoint 424 close to the first display area AA1. The angle between the tangent line of the first endpoint 424 and the plane where the light emitting surface of the display panel is located is α.

[0051] The intersection of the first section CC' and the second arc surface 452 is a second arc line 453. The second arc line 453 includes a second end point 454 away from the first display area AA1. The angle between the tangent line of the second end point 454 and the plane where the light emitting surface of the display panel is located is β.

[0052] 0°<β<α.

[0053] Specifically, the display panel includes a first cross section CC', the first cross section CC' is perpendicular to the light emitting surface of the display panel and parallel to the direction of the second display area AA2 pointing to the first display area AA1 (ie Figure 5 The intersection of the first cross section CC' and the first curved surface 422 is a first arc 423. The first arc 423 includes a first endpoint 424 near the first display area AA1. The angle between the tangent of the first endpoint 424 and the plane of the light-emitting surface of the display panel is α. The intersection of the first cross section CC' and the second curved surface 452 is a second arc 453. The second arc 453 includes a second endpoint 454 away from the first display area AA1. The angle between the tangent of the second endpoint 454 and the plane of the light-emitting surface of the display panel is β, where β<α. That is, the first curved surface 422 and the second curved surface 452 in the dimming structure 41 are asymmetric structures, preventing the symmetrical distribution of light emitted by the sub-pixel 301 after passing through the corresponding dimming structure 41, which affects the emission of light at certain angles, the brightness of light emitted from the second display area AA2, and the display quality of the display panel.

[0054] Continue to refer Figure 1 、 Figure 2 and Figure 5 , optional, where 65°≤α≤90°.

[0055] Specifically, the intersection of the first section C-C' and the first curved surface 422 is a first arc 423. The first arc 423 includes a first endpoint 424 close to the first display area AA1. The angle between the tangent of the first endpoint 424 and the plane where the light-emitting surface of the display panel is located is α, 65°≤α≤90°, which is conducive to the total reflection of light at more angles emitted by the corresponding sub-pixel 301 when passing through the first curved surface 422, so that when the user views the display panel at an angle equivalent to a normal viewing angle directly above the first display area AA1 of the display panel, the brightness of the light emitted from the second display area AA2 is further improved.

[0056] Continue to refer Figure 1 、 Figure 2 and Figure 5 , optional, where 0°<β≤30°.

[0057] Specifically, the intersection of the first section C-C' and the second curved surface 452 is the second arc 453, and the second arc 453 includes a second endpoint 454 away from the first display area AA1. The angle between the tangent of the second endpoint 454 and the plane where the light-emitting surface of the display panel is located is β, 0°<β≤30°. The second curved surface 452 causes the light emitted from the corresponding sub-pixel 301 to be refracted through the second curved surface 452, so that when the user views the display panel at an angle equivalent to a normal viewing angle directly above the first display area AA1 of the display panel, the uniformity of the light output brightness of the second display area AA2 is improved, and the situation in which the light emitted from the sub-pixel 301 is totally reflected by the second curved surface 452 and cannot be emitted from the light-emitting surface of the display panel is effectively reduced.

[0058] Figure 6 yes Figure 2 Another partially enlarged structural diagram of the middle B part (in order to clearly illustrate the technical solution of this embodiment, Figure 6 The local enlarged diagram is illustrated by taking the panel structure corresponding to a sub-pixel 301 as an example), refer to Figure 1 、 Figure 2 and Figure 6 Optionally, the display panel further includes a pixel definition layer 50 having a plurality of openings 501 , the pixel definition layer 50 including a flat portion 502 between the openings 501 , the pixel definition layer 50 is located on a side of the array layer 20 away from the base substrate 10 , and each sub-pixel 301 is correspondingly disposed within one of the openings 501 ;

[0059] The display panel includes a first cross section CC', which passes through the dimming structure 41 and the corresponding sub-pixel 301. The first cross section CC' is perpendicular to the light emitting surface of the display panel and parallel to the second display area AA2 and points towards the first display area AA1.

[0060] The flat portion 502 includes a first bottom surface 503 , which is located on a side of the flat portion 502 close to the base substrate 10 . An intersection line between the first bottom surface 503 and the first cross section CC′ is a first intersection line 504 . The first intersection line 504 includes an end point A 505 away from the first display area AA1 .

[0061] The intersection line of the first cross section CC' and is a first arc line 423. The first arc line 423 includes a first end point 424 close to the first display area AA1 and a third end point 425 away from the first display area AA1.

[0062] In the first section CC', the vertical projection of the third endpoint 425 on the light-emitting surface of the display panel coincides with the vertical projection of the endpoint A 505 of the first intersection line 504 closest to it on the light-emitting surface of the display panel; the vertical projection of the first endpoint 424 on the light-emitting surface of the display panel is located between the midpoint 506 of the first intersection line 504 closest to it and the vertical projection of the endpoint A 505 on the light-emitting surface of the display panel.

[0063] Specifically, the display panel includes a first cross section CC', the first cross section CC' passes through the dimming structure 41 and the corresponding sub-pixel 301, the first cross section CC' is perpendicular to the light emitting surface of the display panel, and is parallel to the direction of the second display area AA2 pointing to the first display area AA1 ( Figure 6 In the X direction), in the first section CC', the vertical projection of the third endpoint 425 in the first arc 423 on the light-emitting surface of the display panel coincides with the vertical projection of the endpoint A 505 of the first intersection line 504 closest to it on the light-emitting surface of the display panel, and the vertical projection of the first endpoint 424 in the first arc 423 on the light-emitting surface of the display panel is located between the midpoint 506 of the first intersection line 504 closest to it and the vertical projection of the endpoint A 505 on the light-emitting surface of the display panel. Due to the limited thickness of the optical structure layer 40 in the display panel, such a setting is conducive to setting the curvature radius of the first curved surface 422 to a smaller value, which is conducive to the total reflection of the light emitted by the first optical structure layer 43 when it enters the first curved surface 422. Moreover, the vertical projection of the first curved surface 422 on the light-emitting surface of the display panel does not overlap with the vertical projection of the corresponding sub-pixel 301 on the light-emitting surface of the display panel, effectively preventing the total reflection structure 42 from affecting the light emitted from the corresponding sub-pixel 301 perpendicular to the light-emitting surface of the display panel.

[0064] Figure 7 yes Figure 2 Another partially enlarged structural diagram of the middle B part (in order to clearly illustrate the technical solution of this embodiment, Figure 7 The local enlarged diagram is illustrated by taking the panel structure corresponding to a sub-pixel 301 as an example), refer to Figure 1 、 Figure 2 and Figure 7 Optionally, the display panel further includes a pixel definition layer 50 having a plurality of openings 501 , the pixel definition layer 50 including a flat portion 502 between the openings 501 , the pixel definition layer 50 is located on a side of the array layer 20 away from the base substrate 10 , and each sub-pixel 301 is correspondingly disposed within one of the openings 501 ;

[0065] The display panel includes a first cross section CC', which passes through the dimming structure 41 and the corresponding sub-pixel 301. The first cross section CC' is perpendicular to the light emitting surface of the display panel and parallel to the second display area AA2 and points towards the first display area AA1.

[0066] The flat portion 502 includes a first bottom surface 503 , which is located on a side of the flat portion 502 close to the base substrate 10 . An intersection line between the first bottom surface 503 and the first cross section CC′ is a first intersection line 504 . The first intersection line 504 includes a B end point 507 close to the first display area AA1 .

[0067] The intersection line of the first cross section CC' and the second arc surface 452 is a second arc line 453. The second arc line 453 includes a second end point 454 away from the first display area AA1 and a fourth end point 455 close to the first display area AA1.

[0068] The sub-pixel 301 includes a second bottom surface 302, which is located on a side of the sub-pixel 301 close to the base substrate 10. The intersection line of the second bottom surface 302 and the first cross section CC' is a second intersection line 303, and the second intersection line 303 includes an end point C 304 close to the first display area AA1.

[0069] In the first cross section CC', the vertical projection of the fourth endpoint 455 on the light emitting surface of the display panel is located between the midpoint 305 of the corresponding second intersection line 303 and the vertical projection of the endpoint 304 on the light emitting surface of the display panel;

[0070] The vertical projection of the second endpoint 454 on the light emitting surface of the display panel is located between the midpoint 506 of the first intersection line 504 closest to it and the vertical projection of the second endpoint 507 on the light emitting surface of the display panel.

[0071] Specifically, in the first cross section CC', the vertical projection of the fourth endpoint 455 on the light-emitting surface of the display panel lies between the midpoint 305 of the corresponding second intersection line 303 and the vertical projection of the C endpoint 304 on the light-emitting surface of the display panel. The vertical projection of the second endpoint 454 on the light-emitting surface of the display panel lies between the midpoint 506 of the first intersection line 504 closest to it and the vertical projection of the B endpoint 507 on the light-emitting surface of the display panel. Due to the limited thickness of the optical structure layer 40 in the display panel, this arrangement facilitates setting a larger radius of curvature of the second curved surface 452, thus facilitating refraction of light emitted from the first optical structure layer 43 upon entering the second curved surface 452. This effectively reduces the possibility that light emitted from the sub-pixel 301 is totally reflected by the second curved surface 452, preventing it from exiting the light-emitting surface of the display panel. Moreover, in the same dimming structure 41, a portion of the second optical structure layer 44 between the first curved surface 422 and the second curved surface 452 is not in contact with the first optical structure layer 43, but is in direct contact with the film layer in contact with the optical structure layer 40, thereby effectively reducing the impact of the dimming structure 41 on the light emitted from the corresponding sub-pixel 301 perpendicular to the light-emitting surface of the display panel, thereby improving the display effect of the display panel.

[0072] Continue to refer Figure 1 、 Figure 2 and Figure 7 , Optionally, the refractive index of the first optical structure layer 43 is n1, and the refractive index of the second optical structure layer 44 is n2;

[0073] 1.5≤n1≤2, 1.2≤n2≤1.6.

[0074] This embodiment further illustrates that the refractive index range of the first optical structure layer 43 is n1, where 1.5 ≤ n1 ≤ 2; and the refractive index range of the second optical structure layer 44 is n2, where 1.2 ≤ n2 ≤ 1.6. Since the side of the optical structure layer 40 facing the light-emitting surface E of the display panel can also have other film structures, such as an encapsulation structure layer, optical adhesive, and a cover plate, the side of the optical structure layer 40 facing away from the light-emitting surface of the display panel can also have other film structures, such as an encapsulation structure layer, a light-emitting structure layer 30, and a pixel definition layer 50. Therefore, in this embodiment, the refractive index n1 of the first optical structure layer 43 is greater than the refractive index n2 of the second optical structure layer 44. In order to match the refractive indices of other film layers of the panel on both sides of the optical structure layer 40, the refractive index range of the first optical structure layer 43 is n1, 1.5≤n1≤2; the refractive index range of the second optical structure layer 44 is n2, 1.2≤n2≤1.6, so as to meet the requirements of the refraction of the outgoing light of the panel through the various film layers of the panel and the change of the outgoing angle through the optical structure layer 40, and finally the brightness of the second display area AA2 observed by the user at the R position tends to be consistent with the brightness of the first display area AA1.

[0075] Optionally, the display panel further includes an encapsulation structure layer, and the encapsulation structure layer is located on a side of the light emitting structure layer away from the array layer;

[0076] The optical structure layer is located on a side of the packaging structure layer close to the array layer, or the optical structure layer is located on a side of the packaging structure layer far from the array layer.

[0077] Continue to refer Figure 1 、 Figure 2 and Figure 7The display panel also includes a packaging structure layer 60 (not filled in the figure), which is located on the side of the light-emitting structure layer 30 away from the array layer 20; the optical structure layer 40 is located on the side of the packaging structure layer 60 away from the array layer 20. After the light emitted from the light-emitting structure layer 30 passes through the packaging structure layer 60, the optical structure layer 40 can change the emission angle of the light-emitting surface that is finally emitted to the display panel. Optionally, the optical structure layer can also be located on the side of the packaging structure layer close to the array layer. At this time, the influence of the packaging structure layer on the direction of the light emitted from the optical structure layer can be weakened or offset by adjusting the parameters of the optical structure layer. Regardless of which side of the optical structure layer 40 the packaging structure layer 60 of this embodiment is on, the amount of light at a large viewing angle in the second display area AA2 can be increased, thereby enhancing the light output brightness at a large viewing angle in the second display area AA2, reducing the difference in light output brightness between the first display area AA1 and the second display area AA2, and improving the display quality of the display panel.

[0078] Figure 8 yes Figure 1 Another structural schematic diagram of the display panel when viewed from the side along direction A, Figure 8 The schematic diagram of the partially enlarged structure of the B' part can be referred to Figure 3 ,refer to Figure 1 、 Figure 3 and Figure 8 Optionally, the second display area AA2 is a bent display area, and the bent display area is bent in a direction away from the light emitting surface of the display panel.

[0079] Specifically, the display panel provided in this embodiment is a flexible display panel, including a display area AA and a non-display area NA surrounding the display area AA. The display area AA includes a first display area AA1 and a second display area AA2. The second display area AA2 is located on the side of the first display area AA1 close to the non-display area NA. The second display area AA2 is a bent display area, and the bent display area bends in the direction away from the light-emitting surface of the display panel. The dimming structure 41 in the second display area AA2 includes a total reflection structure 42. In the second display area AA2, the first emitting light L1 emitted from the optical structure layer 30 undergoes at least one total reflection after passing through the total reflection structure 42, and is emitted from the light-emitting surface of the display panel as the second emitting light L2. The angle formed by the first emitting light L1 and the normal F11 of the light-emitting surface of the display panel is smaller than the angle formed by the second emitting light L2 and the normal F12 of the light-emitting surface of the display panel. Assuming that the user's viewing angle is Figure 8At the R position in the image (equivalent to the human eye), that is, when the user is directly above the first display area AA1 of the display panel and views the display panel at an angle equivalent to a normal viewing angle, the light originally having a small viewing angle in the second display area AA2 is converted into light having a large viewing angle and emitted from the light-emitting surface of the display panel through the setting of the total reflection structure 42, so that the amount of light with a large viewing angle in the second display area AA2 is increased, thereby enhancing the brightness of the light emitted at a large viewing angle in the second display area AA2, reducing the difference in the brightness of the light emitted between the first display area AA1 and the second display area AA2, and improving the display quality of the display panel.

[0080] This embodiment provides a display device including the display panel described above.

[0081] Please refer to Figure 9 , Figure 9 It is a schematic diagram of the planar structure of a display device provided by the present invention. Figure 9 The provided display device 1000 includes a display panel 100 , wherein the display panel is the display panel 100 provided by any of the above embodiments of the present invention. Figure 9 The embodiment only uses a mobile phone as an example to illustrate the display device 1000. It is understood that the display device provided in the embodiment of the present invention can be a computer, a television, an in-vehicle display device, or other display device with a display function, and the present invention does not specifically limit this. The display device provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention. For details, please refer to the detailed description of the display panel in the above embodiments, and this embodiment will not be repeated here.

[0082] It can be seen from the above embodiments that the display panel and display device provided by the present invention achieve at least the following beneficial effects:

[0083] The display panel provided by the present invention includes a display area and a non-display area surrounding the display area, wherein the display area includes a first display area and a second display area, and the second display area is located on the side of the first display area close to the non-display area. The display panel includes a base substrate; an array layer is located on one side of the base substrate; a light-emitting structure layer is located on the side of the array layer away from the base substrate, and the light-emitting structure layer includes a plurality of sub-pixels. The second display area in the display panel includes an optical structure layer, and the optical structure layer is located on the side of the light-emitting structure layer away from the base substrate; the optical structure layer includes a dimming structure, and in the second display area, in a direction perpendicular to the light-emitting surface of the display panel, the dimming structure is arranged corresponding to the sub-pixels, that is, there is a dimming structure corresponding to the sub-pixels in the second display area. The dimming structure includes a total reflection structure, and in the second display area, the first outgoing light emitted from the optical structure layer undergoes at least one total reflection after passing through the total reflection structure, and is emitted from the light-emitting surface of the display panel as the second outgoing light, and the angle formed by the first outgoing light and the normal to the light-emitting surface of the display panel is smaller than the angle formed by the second outgoing light and the normal to the light-emitting surface of the display panel. When a user views the display panel at an angle equivalent to a normal viewing angle directly above the first display area of ​​the display panel, the light originally having a small viewing angle in the second display area is converted into light having a large viewing angle and emitted from the light-emitting surface of the display panel through the setting of the total reflection structure, so that the amount of light with a large viewing angle in the second display area is increased, thereby enhancing the brightness of the light output at a large viewing angle in the second display area, reducing the difference in the brightness of the light output between the first display area and the second display area, and improving the display quality of the display panel.

[0084] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A display panel, characterized in that: include substrate, a light-emitting structure layer, the light-emitting structure layer being located on one side of the base substrate and comprising a plurality of sub-pixels; A pixel definition layer comprising a plurality of opening regions, wherein the sub-pixels are arranged in the opening regions; an optical structure layer, the optical structure layer being located on a side of the light-emitting structure layer away from the base substrate; The optical structure layer includes a first optical structure layer and a second optical structure layer; The optical structure layer includes a dimming structure, and the dimming structure is arranged corresponding to the sub-pixel; The dimming structure is an interface between the first optical structure layer and the second optical structure layer; The dimming structure includes a first dimming structure and a second dimming structure, the first dimming structure includes a first side surface facing the opening area, and the second dimming structure includes a second side surface facing the opening area, wherein the angle between the first side surface and the plane where the display panel is located is α, and the angle between the second side surface and the plane where the display panel is located is β; wherein, 0°＜β＜α。 2. The display panel according to claim 1, wherein: The interface corresponding to the first dimming structure is a first curved surface, and the interface corresponding to the second dimming structure is a second curved surface. The maximum curvature radius of the first curved surface is smaller than the minimum curvature radius of the second curved surface.

3. The display panel according to claim 1, wherein: 65°≤α≤90°。 4. The display panel according to claim 1, wherein: 0°＜β≤30°。 5. The display panel according to claim 1, wherein: The display panel includes a display area and a non-display area surrounding the display area, the display area includes a first display area and a second display area, and the second display area is located on a side of the first display area close to the non-display area; The dimming structure is located in the second display area.

6. The display panel according to claim 5, wherein: The first dimming structure and the second dimming structure correspond to the same sub-pixel.

7. The display panel according to claim 5, wherein: The first dimming structure is located on a side of the second dimming structure close to the first display area.

8. The display panel according to claim 1, wherein: The display panel includes a display area and a non-display area surrounding the display area, the display area includes a first display area and a second display area, and the second display area is located on a side of the first display area close to the non-display area; The interface corresponding to the first dimming structure is a first curved surface, and the interface corresponding to the second dimming structure is a second curved surface; The pixel definition layer includes a flat portion between each opening; The display panel includes a first cross-section, the first cross-section passes through the dimming structure and the sub-pixel corresponding thereto, the first cross-section is perpendicular to the light emitting surface of the display panel and parallel to the direction from the second display area to the first display area; The flat portion includes a first bottom surface, the first bottom surface is located on a side of the flat portion close to the base substrate, an intersection line between the first bottom surface and the first cross section is a first intersection line, and the first intersection line includes an end point A away from the first display area; An intersection line of the first cross section and the first arc surface is a first arc line, and the first arc line includes a first endpoint close to the first display area and a third endpoint away from the first display area; In the first cross-section, the vertical projection of the third endpoint on the light-emitting surface of the display panel coincides with the vertical projection of the end point A of the first intersection line closest to it on the light-emitting surface of the display panel; the vertical projection of the first endpoint on the light-emitting surface of the display panel is located between the midpoint of the first intersection line closest to it and the vertical projection of the end point A on the light-emitting surface of the display panel.

9. The display panel according to claim 1, wherein: The display panel includes a display area and a non-display area surrounding the display area, the display area includes a first display area and a second display area, and the second display area is located on a side of the first display area close to the non-display area; The interface corresponding to the first dimming structure is a first curved surface, and the interface corresponding to the second dimming structure is a second curved surface; The pixel definition layer includes a flat portion between each opening; The display panel includes a first cross-section, the first cross-section passes through the dimming structure and the sub-pixel corresponding thereto, the first cross-section is perpendicular to the light emitting surface of the display panel and parallel to the direction from the second display area to the first display area; The flat portion includes a first bottom surface, the first bottom surface is located on a side of the flat portion close to the base substrate, an intersection line between the first bottom surface and the first cross section is a first intersection line, and the first intersection line includes an end point B close to the first display area; An intersection line of the first cross section and the second arc surface is a second arc line, and the second arc line includes a second endpoint away from the first display area and a fourth endpoint close to the first display area; The sub-pixel includes a second bottom surface, the second bottom surface is located on a side of the sub-pixel close to the base substrate, an intersection line between the second bottom surface and the first cross section is a second intersection line, and the second intersection line includes an end point C close to the first display area; In the first cross section, the vertical projection of the fourth endpoint on the light exit surface of the display panel is located between the midpoint of the second intersection line corresponding thereto and the vertical projection of the third endpoint on the light exit surface of the display panel; The vertical projection of the second endpoint on the light emitting surface of the display panel is located between the midpoint of the first intersection line closest to the second endpoint and the vertical projection of the light emitting surface of the display panel.

10. The display panel according to claim 1, wherein The refractive index of the first optical structure layer is greater than the refractive index of the second optical structure layer.

11. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 10.

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