CN216145641U

CN216145641U - Display panel and display device

Info

Publication number: CN216145641U
Application number: CN202121461048.4U
Authority: CN
Inventors: 石博; 于池; 李泽宇; 彭伊娜; 田越; 黄炜赟; 王娅琼
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-03-29
Anticipated expiration: 2031-06-29

Abstract

The present disclosure provides a display panel and a display device, including: a substrate; a plurality of light emitting devices having different light emitting areas, the light emitting devices being located on the substrate; a first refractive index layer including a plurality of open regions corresponding to the plurality of light emitting devices, a projection of the open regions on the substrate at least partially overlapping a projection of the light emitting devices on the substrate; wherein, the profile shape of the cross section of the side wall of at least part of the opening region in the direction parallel to the surface of the substrate comprises a plurality of concave-convex curves; the first refractive index layer is used for reflecting light emitted by the light-emitting device on the side wall; the second refractive index layer is located on one side, away from the substrate, of the first refractive index layer, the whole face of the second refractive index layer is arranged and filled in each opening area, and the refractive index of the second refractive index layer is larger than that of the first refractive index layer.

Description

Display panel and display device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a display panel and a display device.

Background

Organic electroluminescent Display (OLED) panels have advantages of self-luminescence, fast response, wide viewing angle, high brightness, bright color, lightness and thinness, and are one of the hot spots in the research field of displays at present, and are considered as next generation Display technologies.

SUMMERY OF THE UTILITY MODEL

The embodiment of the disclosure provides a display panel and a display device, which are used for improving the light extraction efficiency of a blue sub-pixel.

Accordingly, an embodiment of the present disclosure provides a display panel, including:

a substrate;

a plurality of light emitting devices having different light emitting areas, the light emitting devices being located on the substrate;

a first refractive index layer including a plurality of open regions corresponding to the plurality of light emitting devices, a projection of the open regions on the substrate at least partially overlapping a projection of the light emitting devices on the substrate; wherein the contour shape of the cross section of at least part of the side wall of the opening region in the direction parallel to the substrate surface comprises a plurality of concave-convex curves; the first refractive index layer is used for reflecting light emitted by the light-emitting device at the side wall;

the second refractive index layer is located on one side, away from the substrate, of the first refractive index layer, the whole surface of the second refractive index layer is arranged and filled in each opening area, and the refractive index of the second refractive index layer is larger than that of the first refractive index layer.

Optionally, in the display panel provided by the embodiment of the present disclosure, in a direction parallel to the substrate surface, in a sidewall of the opening region corresponding to the light emitting device having the largest light emitting area, a top edge and/or a bottom edge of the sidewall includes a plurality of concave-convex curves.

Optionally, in the above display panel provided in this disclosure, the substrate includes a plurality of first sub-pixel regions, second sub-pixel regions, and third sub-pixel regions of different colors, and the plurality of light emitting devices with different light emitting areas includes a first area light emitting device, a second area light emitting device, and a third area light emitting device, the first area light emitting device corresponds to the first sub-pixel region, the second area light emitting device corresponds to the second sub-pixel region, and the third area light emitting device corresponds to the third sub-pixel region; wherein,

the luminous efficiency of the third sub-pixel region is lower than that of the first sub-pixel region and lower than that of the second sub-pixel region, and the top edge and/or the bottom edge of the side wall of the opening region corresponding to the third sub-pixel region comprise a plurality of concave-convex curves.

Optionally, in the display panel provided in the embodiment of the present disclosure, in a direction parallel to the substrate surface, the curved shape is an "S" or "Z" shape.

Optionally, in the display panel provided in the embodiment of the present disclosure, a cross-sectional shape of the opening region is approximately an inverted trapezoid along a thickness direction of the substrate.

Optionally, in the display panel provided by the embodiment of the present disclosure, the display panel further includes a micro-prism structure located in at least a part of the opening area, and an orthographic projection area of the micro-prism structure on the substrate is smaller than an orthographic projection area of the at least a part of the opening area on the substrate; the microprism structure is disposed in the same layer as the first index layer.

Optionally, in the display panel provided in the embodiment of the present disclosure, the micro-prism structure is located in an opening region corresponding to a light emitting device with a largest light emitting area.

Optionally, in the display panel provided in this disclosure, the micro-prism structure is located in a central region of the opening region.

Optionally, in the display panel provided by the embodiment of the present disclosure, a slope angle of the micro-prism structure is approximately the same as a slope angle of the first refractive index layer, and a height of the micro-prism structure is the same as a height of the first refractive index layer.

Optionally, in the display panel provided in the embodiment of the present disclosure, a cross-sectional shape of the micro-prism structure along the thickness direction of the substrate is a regular trapezoid, a triangle, or an arc.

Optionally, in the display panel provided in the embodiment of the present disclosure, a slope angle of the micro-prism structure is 50 ° to 70 °, and a width of a bottom side of a cross section of the micro-prism structure along the thickness direction of the substrate is 1um to 8 um.

Optionally, in the display panel provided in the embodiment of the present disclosure, an encapsulation layer located on a side of the second refractive index layer away from the substrate is further included, the light emitting device includes an anode, a light emitting layer, and a cathode sequentially stacked on the substrate, and the first refractive index layer is located between the cathode and the second refractive index layer.

Optionally, in the display panel provided by the embodiment of the present disclosure, a material of the first refractive index layer includes polyimide, and a material of the second refractive index layer includes SiNx.

Optionally, in the display panel provided in the embodiment of the present disclosure, an encapsulation layer located between the light emitting device and the first refractive index layer is further included.

Optionally, in the display panel provided in the embodiment of the present disclosure, the display panel further includes: the touch structure is positioned between the packaging layer and the second refractive index layer, and the flat layer is positioned between the touch structure and the second refractive index layer; the flat layer is multiplexed into the first refractive index layer.

Optionally, in the display panel provided in the embodiment of the present disclosure, the touch structure includes a first touch electrode layer, a touch insulating layer, and a second touch electrode layer, which are stacked, where the first touch electrode layer is close to the substrate, and the first refractive index layer is disposed on a side of the second touch electrode layer, which is far from the substrate.

Optionally, in the display panel provided in the embodiment of the present disclosure, the first touch electrode layer and the second touch electrode layer include a plurality of metal grids, each metal grid includes a plurality of metal wires, the plurality of metal wires define meshes of the metal grid in a staggered manner, an orthographic projection of each metal wire on the substrate is located between adjacent light emitting devices, and the first refractive index layer covers the metal wires.

Optionally, in the display panel provided by the embodiment of the present disclosure, the material of the first refractive index layer includes a resin, and the material of the second refractive index layer includes a resin mixed with acrylic particles or an acrylic material.

Optionally, in the above display panel provided by the embodiment of the present disclosure, the light emitting device includes a red light emitting device, a green light emitting device, and a blue light emitting device, and the light emitting device with the largest light emitting area is the blue light emitting device.

Optionally, in the display panel provided by the embodiment of the present disclosure, an orthographic projection area of the opening region on the substrate is greater than or equal to an orthographic projection area of an effective light emitting area of the light emitting device on the substrate.

Correspondingly, the embodiment of the disclosure also provides a display device, which comprises the display panel.

Drawings

Fig. 1 is a schematic structural diagram of a display panel provided in the related art;

fig. 2 is a schematic structural diagram of another display panel provided in the related art;

fig. 3 is a schematic structural diagram of another display panel provided in the related art;

fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the disclosure;

fig. 5 is a schematic structural diagram of another display panel provided in the embodiment of the present disclosure;

fig. 6 is a schematic view of a structure of the light emitting device 23 and the sidewall 331 in fig. 4 and 5;

fig. 7 is a schematic view of another structure of the light emitting device 23 and the sidewall 331 in fig. 4 and 5;

fig. 8 is a schematic structural diagram of another display panel provided in the embodiment of the present disclosure;

fig. 9 is a schematic top view illustrating a display panel according to an embodiment of the disclosure;

fig. 10 is a schematic structural diagram of another display panel provided in the embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a display panel provided in the prior art;

fig. 12 is a schematic structural diagram of another display panel provided in the embodiment of the present disclosure;

fig. 13 is a schematic structural diagram of another display panel provided in the embodiment of the present disclosure;

fig. 14 is a schematic top view illustrating a display panel according to an embodiment of the disclosure;

fig. 15 is a schematic structural diagram of another display panel provided in the embodiment of the present disclosure;

fig. 16 is a schematic structural diagram of another display panel provided in the embodiment of the present disclosure;

fig. 17 is a schematic structural diagram of another display panel provided in the embodiment of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure clearer, the present disclosure will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present disclosure, but not all of the embodiments. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort, shall fall within the scope of protection of the present disclosure.

The shapes and sizes of the various elements in the drawings are not to be considered as true proportions, but are merely intended to illustrate the present disclosure.

In the conventional OLED, as shown in fig. 1, since the light emitted from the light emitting device 10 finally enters air (low refractive index) from the glass cover plate 20 (high refractive index), when the incident angle of the light at the interface of the glass cover plate 10 reaches or exceeds the critical angle of total reflection, total internal reflection occurs, and most of the emitted light is consumed by total reflection and scattering in the device, resulting in low overall light extraction efficiency.

In order to improve the light extraction efficiency of the OLED, as shown in fig. 2, a Micro prism (Micro lens)40 may be fabricated outside the encapsulation layer 30, that is, the Micro prism 40 with a low refractive index + the flat layer 50 with a high refractive index are used, and the total reflection principle is utilized to adjust the incident angle when the light reaches the interface of the glass cover plate 20, so as to reduce the total internal reflection of the light in the oblique viewing angle direction and improve the light extraction efficiency.

The traditional RGB pixel arrangement mode can not meet the requirement of a high-resolution product, in order to enable the luminous area of the sub-pixels to be larger on the premise of a considerable display effect, the GGRB pixel arrangement mode is adopted at present, and the screen burning problem can be effectively improved by the GGRB pixel arrangement mode.

However, in the GGRB pixel arrangement, as shown in fig. 3, since the area of the B pixel is large, many light rays emitted by the B pixel do not reach the critical angle of total reflection when reaching the interface of the micro prism 40, and thus cannot be emitted from the surface of the glass cover plate finally, so that the luminance gain of blue light is much lower than that of red light and green light.

Based on this, in order to solve the problem that the luminance gain of blue light is much lower than that of red and green light, embodiments of the present disclosure provide a display panel, as shown in fig. 4 to 7, including:

a substrate 1;

a plurality of light emitting devices (21, 22, 23) having different light emitting areas, the light emitting devices (21, 22, 23) being located on the substrate 1;

a first refractive index layer 3 including a plurality of open regions (31, 32, 33) corresponding to the plurality of light emitting devices (21, 22, 23), a projection of the open regions (e.g., 31) on the substrate 1 at least partially overlapping a projection of the light emitting devices 21 on the substrate 1; wherein the profile shape of the cross section of the sidewall 331 of at least a part of the opening region (e.g., 33) in the direction parallel to the surface of the substrate 1 includes a plurality of concave-convex curves; the first refractive index layer 3 is for reflecting light emitted from the light emitting devices (21, 22, 23) at the sidewall 331;

and a second refractive index layer 4 located on a side of the first refractive index layer 3 away from the substrate 1, wherein the second refractive index layer 4 is disposed over the entire surface and fills each opening region (31, 32, 33), and the refractive index of the second refractive index layer 4 is greater than the refractive index of the first refractive index layer 3.

Fig. 4 and 5 are schematic cross-sectional views of a display panel, fig. 6 and 7 may be schematic top views of the light emitting device 23, the opening region 33, and the first refractive index layer 3 in fig. 4, and fig. 6 and 7 may be schematic top views of the light emitting device 23, the opening region 33, and the first refractive index layer 3 in fig. 5.

In the display panel provided by the embodiment of the present disclosure, since the second refractive index layer 4 with a high refractive index covers the opening regions (31, 32, 33), and the first refractive index layer 3 is a low refractive index layer, the sidewall 331 of the opening region (for example, 33) is an interface where light emitted by the light emitting device 23 is totally reflected, and the outline shape of the cross section of the sidewall 331 of at least part of the opening region (for example, 33) of the first refractive index layer 3 in the direction parallel to the surface of the substrate 1 is set to include a plurality of concave-convex curves, so that the area of the sidewall 331 of the opening region 33 can be increased, the area of the interface with total reflection can be increased, the number of light which is totally emitted can be increased, and the light extraction gain of the light emitting device 23 can be improved.

In practical implementation, in the display panel provided in the embodiment of the present disclosure, as shown in fig. 4, an encapsulation layer 5 is further included on a side of the second refractive index layer 4 facing away from the substrate 1, that is, the first refractive index layer 3 and the second refractive index layer 4 provided in the embodiment of the present disclosure are fabricated before the display panel is encapsulated; the light emitting device (21, 22, 23) includes an anode, a light emitting layer, and a cathode (not shown) sequentially stacked on the substrate 1 with the first refractive index layer 3 between the cathode and the second refractive index layer 4.

In specific implementation, in the display panel provided in the embodiment of the present disclosure, as shown in fig. 4, the material of the first refractive index layer 3 may include polyimide, and the material of the second refractive index layer 4 may include SiNx. Specifically, since a Pixel Defining Layer (PDL) is required to be manufactured to define a pixel opening region when manufacturing the display panel, the light emitting device is manufactured in the corresponding pixel opening region, and the material of the PDL is typically polyimide, the first refractive index layer 3 in the embodiment of the present disclosure may be manufactured by using a PDL material; specifically, the refractive index of polyimide is 1.65, and the refractive index of SiNx is 1.94.

It should be noted that, in the embodiment of the present disclosure, fig. 4 illustrates that the material of the first refractive index layer is PDL (polyimide), and the material of the second refractive index layer includes SiNx, so that the manufacturing is convenient. Of course, in specific implementation, other different materials may be used for the first refractive index layer and the second refractive index layer, as long as the refractive index of the second refractive index layer is larger than that of the first refractive index layer.

In practical implementation, in the above display panel provided in the embodiment of the present disclosure, as shown in fig. 5, an encapsulation layer 5 is further included between the light emitting devices (21, 22, 23) and the first refractive index layer 3, that is, the first refractive index layer 3 and the second refractive index layer 4 provided in the embodiment of the present disclosure are fabricated after the display panel is encapsulated.

In specific implementation, as shown in fig. 8, the display panel provided in the embodiment of the present disclosure further includes: a touch structure 6 between the encapsulation layer 5 and the second refractive index layer 4, and a flat layer 7 between the touch structure 6 and the second refractive index layer 4; the flat layer 7 is multiplexed into the first refractive index layer 3, so that the first refractive index layer 3 does not need to be separately manufactured on the flat layer 7, and the manufacturing of a film layer can be saved. Specifically, the flat layer 7 is used for flattening the surface of the touch structure 6 for performing the subsequent manufacturing process, although the flat layer 7 is reused as the first refractive index layer 3, and the first refractive index layer 3 has an opening region, the second refractive index layer 4 is disposed over the entire surface and covers the opening region, so that what actually plays a role in flattening is the second refractive index layer 4, and thus the embodiment of the disclosure does not affect the flatness of the subsequent film layer.

In specific implementation, in the display panel provided in the embodiment of the present disclosure, as shown in fig. 8, the touch structure 6 includes a first touch electrode layer 61, a touch insulating layer 62, and a second touch electrode layer 63 stacked together, the first touch electrode layer 61 is close to the substrate 1, and the first refractive index layer 3 is disposed on a side of the second touch electrode layer 63 away from the substrate 1. Specifically, one of the first touch electrode layer 61 and the second touch electrode layer 63 is a driving electrode, and the other is a sensing electrode.

In specific implementation, as shown in fig. 9, in the display panel provided in the embodiment of the present disclosure, as shown in fig. 9, fig. 9 is a schematic top view of a portion of the film layer of fig. 8, the first touch electrode layer 61 and the second touch electrode layer 63 include a plurality of metal grids, each metal grid includes a plurality of metal wires 601, the plurality of metal wires 601 are staggered to define meshes 602 of the metal grids, a forward projection of each metal wire 601 on the substrate 1 is located between adjacent light emitting devices, and the first refractive index layer 3 covers the metal wires 601.

In specific implementation, in the above display panel provided by the embodiment of the present disclosure, as shown in fig. 5 and 8, the material of the first refractive index layer 3 may include a resin (material of a flat layer), and the material of the second refractive index layer 4 may include a resin mixed with acryl particles or an acryl material. Specifically, the refractive index of the resin mixed with the acryl fine particles is greater than that of the resin material alone, and the refractive index of the acryl material is greater than that of the resin.

In practical implementation, in order to make the light emitted by the light emitting device totally reflect at the interface of the first refractive index layer as much as possible, in the display panel provided in the embodiment of the present disclosure, as shown in fig. 4, 5 and 8, an orthographic area of the opening region (e.g., 33) on the substrate 1 is greater than or equal to an orthographic area of the effective light emitting region of the light emitting device 23 on the substrate 1.

In specific implementation, in order to make the sub-pixel light emitting area ratio larger on the premise of a comparable display effect, as shown in fig. 10, the embodiment of the present disclosure employs a GGRB pixel arrangement manner, where 21 represents an R sub-pixel, 22 represents a G sub-pixel, and 23 represents a B sub-pixel, and the GGRB pixel arrangement manner can effectively improve the burn-in problem, so that in the display panel provided in the embodiment of the present disclosure, as shown in fig. 4, 5, and 8, the light emitting devices (21, 22, 23) may include a red light emitting device 21, a green light emitting device 22, and a blue light emitting device 23, and the light emitting device 23 with the largest light emitting area is a blue light emitting device.

In particular implementation, in order to increase the light emitting angle of the light emitting device, in the display panel provided in the embodiment of the present disclosure, as shown in fig. 4, 5, and 8, the cross-sectional shape of the opening region (31, 32, 33) is approximately inverted trapezoid along the thickness direction of the substrate 1.

In specific implementation, as shown in fig. 4 and 10, since the blue light emitting device 23 has a large light emitting area, the refractive index n1 of the first refractive index layer 3 (polyimide) is 1.65, and the refractive index n2 of the second refractive index layer 4(SiNx) is 1.94. As shown in fig. 11, fig. 11 is a schematic cross-sectional view of the B pixel shown in fig. 3 in the prior art, where an incident angle θ 1 at which more light (e.g., light L in the central region of the B pixel) reaches the interface between the first refractive index layer 3 and the second refractive index layer 4 is smaller than a critical angle of total reflection (arcsin n1/n2 is 58 °), and total internal reflection occurs again at an air interface after final refraction, so that the light extraction gain of the B pixel is significantly reduced. Therefore, in the display panel provided by the embodiment of the present disclosure, as shown in fig. 4 to 7, in the sidewall 331 of the opening region 33 corresponding to the light emitting device 23 having the largest light emitting area in the direction parallel to the surface of the substrate 1, the top edge and/or the bottom edge of the sidewall 331 includes a plurality of concave-convex curves. This can increase the area of the sidewall 331 of the opening region 33, and thus can increase the interface area for total reflection, thereby increasing the amount of light that is totally emitted, and thus increasing the light extraction gain of the blue light emitting device 23.

Specifically, the embodiment of the present disclosure is illustrated by taking as an example that the top and bottom edges of the sidewall 331 each include a plurality of concave-convex curves.

In specific implementation, in the above display panel provided in the embodiment of the present disclosure, as shown in fig. 4 and 5, the substrate 1 includes a plurality of first sub-pixel regions R, second sub-pixel regions G, and third sub-pixel regions B of different colors, the plurality of light emitting devices (21, 22, 23) having different light emitting areas include a first area light emitting device 21, a second area light emitting device 22, and a third area light emitting device 23, the first area light emitting device 21 corresponds to the first sub-pixel region R, the second area light emitting device 22 corresponds to the second sub-pixel region G, and the third area light emitting device 23 corresponds to the third sub-pixel region B; wherein,

the light emitting efficiency of the third sub-pixel region B is lower than that of the first sub-pixel region R and lower than that of the second sub-pixel region G, and the top and/or bottom of the sidewall 331 of the opening region 33 corresponding to the third sub-pixel region B includes a plurality of concave-convex curves. Therefore, the area of the sidewall 331 of the opening region 33 is increased, and therefore, the total reflection interface area can be increased, so as to increase the amount of the light that is totally emitted, and further increase the light-emitting gain of the light-emitting device 23 corresponding to the third sub-pixel region B.

In practical implementation, in the display panel provided in the embodiment of the present disclosure, as shown in fig. 4 to 7, the curved shape may be "S" or "Z" in a direction parallel to the surface of the substrate 1. Of course, the curvilinear shape may be other shapes.

Specifically, as shown in FIG. 6, the curved shape of the top and bottom edges of the side wall 331 is "S" -shaped; as shown in FIG. 7, the curved shape of the top and bottom edges of the side wall 331 is "Z" shaped. Of course, the top side of fig. 6 and 7 may be "S" shaped, and the bottom side may be "Z" shaped; or the top edge can be Z-shaped, and the bottom edge can be S-shaped.

In practical implementation, in the display panel provided in the embodiment of the present disclosure, as shown in fig. 12 to 14, the display panel further includes a micro-prism structure 7 located in at least a part of the opening region (e.g., 33), and an orthographic projection area of the micro-prism structure 7 on the substrate 1 is smaller than an orthographic projection area of the opening region 33 corresponding to the light-emitting device 23 with the largest light-emitting area on the substrate 1; the microprismatic structure 7 is arranged in the same layer as the first refractive index layer 3. Therefore, the original composition pattern is changed when the first refractive index layer 3 is formed, the patterns of the micro prism structure 7 and the first refractive index layer 3 can be formed through one composition process, the process for independently preparing the micro prism structure 7 is not needed to be added, the preparation process flow can be simplified, the production cost is saved, and the production efficiency is improved.

Fig. 12 and 13 are schematic cross-sectional views of two other types of display panels, and fig. 14 is a schematic top view of the light emitting device 23, the opening region 33, the first refractive index layer 3, and the micro-prism structure 7 in fig. 12 and 13.

In specific implementation, because the light emitting area of the blue light emitting device is large, the incident angle θ 1 of more light rays emitted by the blue light emitting device reaching the interface of the first refractive index layer and the second refractive index layer is smaller than the critical angle of total reflection, and total internal reflection occurs again at the air interface after the light rays are finally refracted, so that the light emitting gain of the pixel B is obviously reduced. In the display panel provided in the embodiment of the present disclosure, as shown in fig. 12 to 14, the micro-prism structure 7 is located in the opening region 33 corresponding to the light emitting device 23 having the largest light emitting area.

Specifically, as shown in fig. 15, fig. 15 is an enlarged schematic view of the blue light emitting device 23, the first refractive index layer 3, the second refractive index layer 4 and the micro-prism structure 7 in fig. 12 and 13, in the embodiment of the present disclosure, an independent micro-prism structure 7 is added in the opening region 33 corresponding to the blue light emitting device 23 on the basis of the structures in fig. 4 and 5, and the propagation direction of the light ray with a smaller incident angle (e.g., the light ray L in the central region of the B pixel) can be changed (i.e., the light ray L incident on the interface of the micro-prism structure 7 after being refracted once is incident on the interface of the first refractive index layer 3) by using the refraction principle, so as to increase the incident angle when the light ray reaches the sidewall of the opening region 33, so that the incident angle reaches the critical angle of total reflection, and more light rays are reflected, thereby further improving the light extraction gain of the blue light emitting device 23.

In practical implementation, since the incident angle of the light emitted from the central region of the blue light emitting device 23 reaching the interface of the first refractive index layer is small, in order to make the incident angle of the light emitted from the central region of the blue light emitting device 23 reaching the interface of the first refractive index layer reach the critical angle of total reflection, in the display panel provided in the embodiment of the present disclosure, as shown in fig. 12 to 14, the micro-prism structure 7 is located in the central region of the opening region 23, and of course, the position of the micro-prism structure 7 may have a certain error from the central region of the opening region 23.

In particular implementation, in order to make the incident angle of the light emitted from the blue light emitting device 23 reaching the interface of the first refractive index layer as much as possible reach the critical angle of total reflection, in the above display panel provided in the embodiment of the present disclosure, as shown in fig. 15, the slope angle θ 2 of the micro-prism structure 7 is approximately the same as the slope angle θ 3 of the first refractive index layer 3, the height h1 of the micro-prism structure 7 is the same as the height h2 of the first refractive index layer 3, and h1 and h2 are preferably 2um to 4 um.

In specific implementation, in the display panel provided in the embodiment of the present disclosure, as shown in fig. 12, 13 and 15, the slope angle θ 2 of the micro-prism structure 7 is 50 ° to 70 °, and the width w of the bottom side of the cross section of the micro-prism structure 7 along the thickness direction of the substrate 1 is 1um to 8um, preferably 4um to 5 um.

In practical implementation, in the display panel provided in the embodiment of the present disclosure, as shown in fig. 12, 13, and 15, the cross-sectional shape of the microprism structure 7 along the thickness direction of the substrate 1 may be a regular trapezoid; of course, other shapes are possible, for example, as shown in fig. 16, the cross-sectional shape of the microprism structure 7 in the thickness direction of the substrate 1 is triangular; as shown in fig. 17, the cross-sectional shape of the microprism structure 7 in the thickness direction of the substrate 1 is a circular arc.

Based on the same utility model concept, this disclosed embodiment still provides a display device, including the display panel in the above-mentioned embodiment. Since the principle of the display device to solve the problem is similar to that of the display panel, the display device can be implemented by the display panel, and repeated descriptions are omitted.

The display device provided by the embodiment of the disclosure can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein nor should they be construed as limiting the present disclosure.

The above-mentioned display panel and display device that this disclosed embodiment provided, because the second refractive index layer of high refractive index covers the open region, and first refractive index layer is the low refractive index layer, therefore the lateral wall of open region is the interface that the light that emitting device emitted takes place the total reflection, this disclosure sets the profile shape of the cross-section that is on a parallel with the substrate surface direction through the lateral wall of at least some open regions with first refractive index layer to including a plurality of concave-convex curves, can increase the lateral wall area of open region like this, consequently, can increase the interfacial area of total reflection, thereby improve the light quantity that takes place the total emission, and then improve emitting device's light-emitting gain.

It will be apparent to those skilled in the art that various changes and modifications can be made in the present disclosure without departing from the spirit and scope of the disclosure. Thus, if such modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include such modifications and variations as well.

Claims

1. A display panel, comprising:

a substrate;

2. The display panel of claim 1, wherein in the sidewall of the opening region corresponding to the light emitting device having the largest light emitting area in a direction parallel to the substrate surface, a top edge and/or a bottom edge of the sidewall includes a plurality of concave-convex curves.

3. The display panel of claim 1, wherein the substrate includes a plurality of first, second, and third sub-pixel regions of different colors, and the plurality of light emitting devices of different light emitting areas include a first area light emitting device corresponding to the first sub-pixel region, a second area light emitting device corresponding to the second sub-pixel region, and a third area light emitting device corresponding to the third sub-pixel region; wherein,

4. The display panel according to claim 2 or 3, wherein the curved shape is an "S" or "Z" shape in a direction parallel to the substrate surface.

5. The display panel of claim 1, wherein a cross-sectional shape of the opening region is approximately inverted trapezoid in a thickness direction of the substrate.

6. The display panel of any one of claims 1-3, 5, further comprising a micro-prismatic structure located within at least a portion of the open area, the micro-prismatic structure having an area of orthographic projection on the substrate that is smaller than an area of orthographic projection of the at least a portion of the open area on the substrate; the microprism structure is disposed in the same layer as the first index layer.

7. The display panel of claim 6, wherein the micro-prism structures are located in the opening regions corresponding to the light emitting devices having the largest light emitting areas.

8. The display panel of claim 7, wherein the micro-prism structures are located in a central region of the open region.

9. The display panel of claim 7, wherein a slope angle of the micro-prism structures is approximately the same as a slope angle of the first refractive index layer, and a height of the micro-prism structures is the same as a height of the first refractive index layer.

10. The display panel of claim 7, wherein a cross-sectional shape of the micro-prism structure in a thickness direction of the substrate is a regular trapezoid, a triangle, or a circular arc.

11. The display panel of claim 7, wherein the micro-prism structures have a slope angle of 50 to 70 °, and a width of a bottom side of a cross section of the micro-prism structures in a thickness direction of the substrate is 1 to 8 um.

12. The display panel according to any one of claims 1 to 3, 5 and 7 to 11, further comprising an encapsulation layer on a side of the second refractive index layer facing away from the substrate, wherein the light emitting device comprises an anode, a light emitting layer and a cathode sequentially stacked on the substrate, and the first refractive index layer is between the cathode and the second refractive index layer.

13. The display panel of claim 12, wherein the material of the first refractive index layer comprises polyimide and the material of the second refractive index layer comprises SiNx.

14. The display panel of any of claims 1-3, 5, 7-11, further comprising an encapsulation layer between the light emitting device and the first index layer.

15. The display panel of claim 14, further comprising: the touch structure is positioned between the packaging layer and the second refractive index layer, and the flat layer is positioned between the touch structure and the second refractive index layer; the flat layer is multiplexed into the first refractive index layer.

16. The display panel according to claim 15, wherein the touch structure includes a first touch electrode layer, a touch insulating layer, and a second touch electrode layer stacked, the first touch electrode layer is close to the substrate, and the first refractive index layer is disposed on a side of the second touch electrode layer away from the substrate.

17. The display panel of claim 16, wherein the first and second touch electrode layers comprise a plurality of metal grids comprising a plurality of metal wires that are interleaved to define meshes of the metal grids, the metal wires are positioned between adjacent light emitting devices in a front projection of the substrate, and the first refractive index layer covers the metal wires.

18. The display panel of claim 14, wherein the material of the first refractive index layer comprises a resin, and the material of the second refractive index layer comprises a resin mixed with acryl particles or an acryl material.

19. The display panel according to any one of claims 1 to 3, 5, and 7 to 11, wherein the light emitting device includes a red light emitting device, a green light emitting device, and a blue light emitting device, and the light emitting device having the largest light emitting area is the blue light emitting device.

20. The display panel of any one of claims 1-3, 5, 7-11, wherein an area of an orthographic projection of the open area on the substrate is greater than or equal to an area of an orthographic projection of an effective light emitting area of the light emitting device on the substrate.

21. A display device comprising the display panel according to any one of claims 1 to 20.