CN110310975B

CN110310975B - Display panel and display device

Info

Publication number: CN110310975B
Application number: CN201910585919.4A
Authority: CN
Inventors: 鲍华山
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2021-12-28
Anticipated expiration: 2039-07-01
Also published as: CN110310975A

Abstract

The invention discloses a display panel and a display device. The display panel includes: a plurality of pixel units, each pixel unit comprising a plurality of pixel groups, each pixel group comprising at least one sub-pixel emitting light of one color; wherein at least one side surface of at least one of the plurality of pixel groups includes a stereoscopic surface. According to the embodiment of the invention, the pixel unit comprises a plurality of pixel groups, and at least one surface of at least one pixel group in the pixel groups comprises a stereoscopic surface, so that the problem of color cast of the display panel under a non-normal viewing angle is solved.

Description

Display panel and display device

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.

Background

With the continuous upgrade of electronic display products, Diode (OLED) display panels are widely used in the display field. However, due to the different light emitting characteristics of the red, green and blue lights, the white light displayed under the normal viewing angle may display different degrees of color shift under the non-normal viewing angle, so that the display effect under the non-normal viewing angle is deteriorated.

Disclosure of Invention

The invention provides a display panel and a display device, which aim to solve the problem of color cast of the display panel and improve the display effect of the display panel.

In a first aspect, an embodiment of the present invention provides a display panel, including:

a plurality of pixel units, each pixel unit comprising a plurality of pixel groups, each pixel group comprising at least one sub-pixel emitting light of one color;

wherein at least one side surface of at least one of the plurality of pixel groups includes a stereoscopic surface.

Optionally, the three-dimensional surface is an arc surface, or the three-dimensional surface comprises at least two planes, and the included angle between any two adjacent planes is greater than 0, or the three-dimensional surface is a combination of the arc surface and the planes;

preferably, the solid surface is a circular arc surface, a conical surface or a frustum-shaped surface.

Optionally, the at least one pixel group comprises a primary sub-pixel and at least one secondary sub-pixel; the stereoscopic surface is formed by the combination of the main sub-pixel and at least one auxiliary sub-pixel.

Optionally, any one of the at least one pixel group includes one sub-pixel, and the stereoscopic surface is formed by the sub-pixels.

Optionally, the display panel further includes a substrate and a plurality of light emitting units corresponding to the plurality of pixel units one to one, the plurality of light emitting units are located on one side of the substrate, each light emitting unit includes a plurality of light emitting layers, each light emitting layer includes at least one sub-pixel emitting light of one color, and at least one light emitting layer of the plurality of light emitting layers includes a first stereoscopic surface on one side surface away from the substrate and/or on one side surface close to the substrate.

Optionally, the plurality of light emitting units further include a plurality of first electrodes in one-to-one correspondence with the plurality of light emitting layers, the plurality of light emitting layers are respectively disposed on one sides of the plurality of first electrodes away from the substrate, and a surface of one side of the first electrode close to the light emitting layer includes a second three-dimensional surface.

Optionally, the first electrode comprises a main sub-electrode and at least one auxiliary sub-electrode, and the second three-dimensional surface is formed by combining the main sub-electrode and the at least one auxiliary sub-electrode.

Optionally, the main sub-pixel is arranged on one side of the main sub-electrode away from the substrate; the auxiliary sub-pixels are respectively arranged on one sides of the corresponding auxiliary sub-electrodes far away from the substrate.

Optionally, the display panel further includes a substrate, the surface of the main sub-pixel close to the substrate and/or the surface far from the substrate is parallel to the substrate, the included angle between the surface of the auxiliary sub-pixel close to the substrate and/or the surface far from the substrate and the substrate is greater than 0, the surface of the main sub-pixel close to the substrate and the surface of the auxiliary sub-pixel close to the substrate form a stereoscopic surface, and/or the surface of the main sub-pixel far from the substrate and the surface of the auxiliary sub-pixel far from the substrate form a stereoscopic surface.

In a second aspect, an embodiment of the present invention further provides a display device, including the display panel provided in any embodiment of the present invention.

According to the display panel and the display device provided by the embodiment of the invention, at least one side surface of a pixel group (including at least one sub-pixel emitting color light) with the fastest brightness attenuation of the emergent light in the display panel can be set into a solid surface according to the actual color cast condition (such as blue cast, cyan cast or red cast) under the non-normal viewing angle, so that the light rays emitted by the pixel group and not perpendicular to the emergent light surface of the display panel are increased, the luminous brightness of the pixel group under the non-normal viewing angle is relatively improved, the brightness deviation of the emergent light of other pixel groups in a pixel unit is further reduced, the color cast problem of the display panel under the non-normal viewing angle is improved, and the display effect is improved.

Drawings

Fig. 1 is a schematic view of a partial plan structure of a display panel according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view along AA' of FIG. 1;

FIG. 3 is a schematic cross-sectional view along BB' in FIG. 1;

FIG. 4 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;

fig. 7 is a schematic cross-sectional view illustrating another display panel according to an embodiment of the invention;

FIG. 8 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;

fig. 9 is a schematic cross-sectional view of another display panel according to an embodiment of the invention;

fig. 10 is a schematic cross-sectional view of another display panel according to an embodiment of the invention;

fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

As described in the background art, the display panel in the prior art has a problem that white light displayed at a front viewing angle (a viewing angle when human eyes are perpendicular to a light emergent surface of the display panel) may show color shifts of different degrees at a non-front viewing angle, so that a display effect at the non-front viewing angle (a viewing angle when human eyes are not perpendicular to the light emergent surface of the display panel) is poor. The inventor researches and discovers that the above problems occur because white light is formed by mixing red, green and blue lights, the light emitting amount of each color light from the display panel is constant under different angles, and the brightness of the different color lights is not uniformly attenuated along with the increase of the visual angle (the visual angle of human eyes is gradually increased from the direction vertical to the display panel to the direction parallel to the light emitting surface of the display panel). For example, the luminance of red light decays faster as the viewing angle increases, and the luminance of blue light decays slower as the viewing angle increases, so that the white screen under the front viewing angle is bluish under the non-front viewing angle. In the conventional display panel, the upper and lower surfaces of the pixels in the thickness direction of the display panel are generally flat, so that most of light emitted by the pixels is emitted in the direction perpendicular to the light emitting surface of the display panel, and a small part of light is emitted in the direction perpendicular to the light emitting surface at a certain angle (not including 0 degree), so that light which can enter human eyes under a non-normal viewing angle is limited, namely, red light, green light and blue light which can enter human eyes under a large viewing angle are fewer, and as mentioned above, the red light is fast attenuated along with the increase of the viewing angle, and the color cast phenomenon is further aggravated.

For the above reasons, embodiments of the present invention provide a display panel that is applicable to a top emission type display panel and also applicable to a bottom emission type display panel. Fig. 1 is a top view of a display panel according to an embodiment of the present invention, fig. 2 is a schematic cross-sectional structure along AA 'in fig. 1, fig. 3 is a schematic cross-sectional structure along BB' in fig. 1, and referring to fig. 1, fig. 2 and fig. 3, the display panel includes:

a plurality of pixel units 20, each pixel unit 20 including a plurality of pixel groups, each pixel group including at least one sub-pixel emitting light of one color;

Optionally, each pixel unit 20 includes at least one first pixel group 21, at least one second pixel group 22, and at least one third pixel group 23, where the light emission colors of the first pixel group 21, the second pixel group 22, and the third pixel group 23 are different, for example, the light emission colors of the first pixel group 21, the second pixel group 22, and the third pixel group 23 are red, green, and blue, respectively, and each pixel unit 20 can display a plurality of colors by mixing the three color lights of red, green, and blue emitted by the pixel groups.

Referring to fig. 2 and 3, which are exemplarily illustrated that each pixel group includes one sub-pixel emitting light of one color, specifically, the first pixel group 21 includes one first sub-pixel 211, the second pixel group 22 includes one second sub-pixel 221, the third pixel group 23 includes one third sub-pixel 231, and the light emission colors of the first sub-pixel 211, the second sub-pixel 221, and the third sub-pixel 231 are different, and fig. 1 is exemplarily illustrated that one side surface of the first pixel group 21 includes a stereoscopic surface. The display panel generally includes a substrate 10, and each pixel unit 20 is disposed on the substrate 10, wherein at least one side surface of at least one pixel group is a three-dimensional surface, and the at least one side surface may be a surface of the pixel group on a side close to the substrate 10 or a surface of the pixel group on a side far from the substrate 10; or at least one side surface of the pixel group includes an upper surface or a lower surface of the pixel group in the thickness direction of the display panel. Illustratively, the surface of the first pixel group 21 on the side away from the substrate 10 includes a three-dimensional surface, which includes a central plane in the middle and a peripheral plane surrounding the central plane, wherein the central plane may be parallel to the light emitting surface of the display panel, and the peripheral plane is inclined at an angle with respect to the central plane. Therefore, most of the light emitted from the central plane is perpendicular to the central plane, and most of the light emitted from the peripheral plane is perpendicular to the peripheral plane, so that compared with the conventional planar pixel group (the surfaces of the pixel group close to the substrate 10 and the surfaces far from the substrate 10 are both flat surfaces), the light emitted by the pixel group in the embodiment, which is not perpendicular to the light emitting surface of the display panel, is increased, thereby relatively improving the light emitting brightness of the pixel group under the non-normal viewing angle. Based on this, when the brightness attenuation speed of the red light is greater than that of the green light, and the brightness attenuation speed of the green light is greater than that of the blue light, the first pixel group 21 may be set as a red light emitting pixel group, and the red light rays which are not perpendicular to the light emitting surface of the display panel and are finally emitted by the pixel unit 20 may be increased by the arrangement of the three-dimensional surface corresponding to the first pixel group 21, so that the emission brightness of the red light under the non-normal viewing angle is improved, the brightness deviation of the red light, the green light and the blue light under the non-normal viewing angle is reduced, and the color shift problem of the display panel under the non-normal viewing angle is improved.

In addition, the display panel provided by the embodiment of the invention includes, but is not limited to, the display panels shown in fig. 1 to 3. Fig. 4 is a schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present invention, and referring to fig. 4, optionally, surfaces of the first pixel group 21 and the second pixel group 21 in the pixel unit 20, which are far away from the substrate 10, both include a stereoscopic surface. At this time, when the brightness attenuation speed of the red light is greater than that of the green light, and the brightness attenuation speed of the green light is greater than that of the blue light, the first pixel group 21 may be set as a red light emitting pixel group, and the second pixel group 22 is set as a green light emitting pixel group, so that red light emitted by the first pixel group 21 and not perpendicular to the light exit surface of the display panel may be increased, and green light emitted by the second pixel group 22 and not perpendicular to the light exit surface of the display panel may be increased, so that the brightness deviations of the red light and the green light from the blue light at non-normal viewing angles may be reduced at the same time.

Alternatively, at least one side surface of the first, second, and third pixel groups 21, 22, and 23 in the pixel unit 20 may each have a stereoscopic surface. When the light emitting colors corresponding to the first pixel group 21, the second pixel group 22 and the third pixel group 23 are red light, green light and blue light, respectively, under the condition that the brightness of the red light, the green light and the blue light under a non-normal viewing angle is increased simultaneously, the color cast problem of the display panel can be improved, and the display effect can be further improved. It should be noted that, by appropriately adjusting parameters of the three-dimensional surface of each pixel group in the pixel unit 20, the number of light rays emitted by each pixel group that are not perpendicular to the light exit surface of the display panel is different, and then the luminance attenuation of each pixel group at the non-normal viewing angle can be balanced, so that the luminance attenuation of different colors of light emitted by each pixel group at the non-normal viewing angle tends to be consistent, and the color shift problem of the display panel is improved. For example, based on the above technical solution, when the three-dimensional plane is composed of a plurality of planes, the number of light rays emitted by the pixel group that are not perpendicular to the light emitting surface of the display panel may be determined by the inclination angle of the peripheral plane relative to the central plane. For example, the larger the inclination angle of the peripheral plane relative to the central plane is, the more light rays emitted by the pixel group are not perpendicular to the light emitting surface of the display panel, so that the luminance of the pixel group under a non-normal viewing angle can be adjusted by setting the inclination angle of the peripheral plane relative to the central plane, thereby improving the color shift problem of the display panel.

The display panel provided in the embodiment of the present invention may be an organic light emitting display panel and an inorganic light emitting display panel, and the embodiment of the present invention is not limited herein. When the display panel is an organic light emitting display panel, the pixel units in the display panel only include light emitting material layers emitting light of different colors, and correspondingly, each pixel group only includes a light emitting material layer emitting light of one color.

It should be further noted that, in the above embodiments, the pixel unit 20 includes the first pixel group 21, the second pixel group 22, and the third pixel group 23 that respectively emit light of different colors, which are taken as an example for illustration, and the pixel unit 20 may include more pixel groups, and the embodiment of the present invention is not limited in this respect. In addition, the above embodiments are exemplified by each pixel group including one sub-pixel, and each pixel group may further include more sub-pixels, which may specifically refer to the following embodiments of the present invention.

The display panel provided by this embodiment can at least set at least one side surface of a pixel group (including at least one sub-pixel emitting a color light) with the fastest brightness attenuation of the light emitted from the display panel to be a solid surface according to an actual color cast condition (such as bluish, bluish or reddish) under a non-front viewing angle, so that the light emitted from the pixel group and not perpendicular to the light emitting surface of the display panel is increased, thereby relatively improving the light emitting brightness of the pixel group under the non-front viewing angle, further reducing the brightness cast with the light emitted from other pixel groups in the pixel unit, thereby improving the color cast of the display panel under the non-front viewing angle and improving the display effect.

Fig. 5 is a schematic cross-sectional structure view of another display panel provided in an embodiment of the present invention, and referring to fig. 5, based on the above technical solution, optionally, the stereoscopic surface is an arc surface, or the stereoscopic surface includes at least two planes, and an included angle between any two adjacent planes is greater than 0, or the stereoscopic surface is a combination of the arc surface and the planes; preferably, the relief surface comprises a convex or concave surface; preferably, the solid surface is a circular arc surface, a conical surface or a frustum-shaped surface.

Fig. 1 to 4 show a structure of a display panel in which a three-dimensional surface of a pixel group is formed by a plurality of planes, and an included angle between any two planes is greater than 0. Referring to fig. 5, fig. 5 schematically shows a case where the solid surface is a convex arc surface, and the solid surface is an arc surface, so that any cross section of the solid surface along a direction perpendicular to the light exit surface of the display panel is arc-shaped, and light emitted by the pixel group is more uniformly radiated outwards, so that light rays of each color light that can enter human eyes are increased when the human eyes are in any direction relative to the display panel under a non-normal viewing angle, and the problem of color cast when the display image is viewed in each direction is solved. When the three-dimensional surface is a conical surface or a frustum-shaped surface, the conical surface or the frustum-shaped surface includes a surface that is not parallel to the light-emitting surface of the display panel, so that compared with the conventional planar pixel group (the surface of the pixel group close to the substrate 10 and the surface far from the substrate 10 are both planar), the light emitted by the pixel group in the embodiment, which is not perpendicular to the light-emitting surface of the display panel, is increased, thereby relatively improving the light-emitting brightness of the pixel group under a non-normal viewing angle. Moreover, the solid surface of the pixel group emitting a certain color light can be set to be an arc surface, a conical surface or a frustum surface according to the actual color cast condition (such as blue cast, cyan cast or red cast) of the display panel under the non-normal viewing angle, so that the light rays emitted by the pixel group and not perpendicular to the light-emitting surface of the display panel are increased, the light-emitting brightness of the pixel group under the non-normal viewing angle is relatively improved, the brightness deviation of the light emitted by other pixel groups in the pixel unit is reduced, and the color cast problem of the display panel under the non-normal viewing angle is improved.

It is understood that, in different pixel units 20, the three-dimensional surfaces of the pixel groups emitting light of the same color may be the same or different, for example, when one side surface of the first pixel group 211 is set as an arc surface, part of the three-dimensional surfaces of the first pixel group 21 are composed of planes, and part of the three-dimensional surfaces of the first pixel group 21 are arc surfaces; part of the first pixel group 21 has a convex stereoscopic surface, and part of the first pixel group 21 has a concave stereoscopic surface. The embodiment of the invention is not limited to this, as long as the light emitted by the first pixel group 21 and not perpendicular to the light emitting surface of the display panel can be increased.

With continuing reference to fig. 2-5, based on the above technical solution, optionally, any one of the at least one pixel group includes a sub-pixel, and the stereoscopic surface is formed by the sub-pixel. Fig. 2 to 5 are exemplarily shown that each pixel group includes one sub-pixel, and the stereoscopic surface may be formed by one sub-pixel, so that the structure of the pixel group is relatively simple, and the process is relatively simpler when the display panel is manufactured.

Fig. 6 is a schematic cross-sectional view of another display panel according to an embodiment of the invention, and referring to fig. 6, at least one pixel group includes a main sub-pixel 2111 and at least one auxiliary sub-pixel 2112; the stereoscopic face is formed by a combination of a main subpixel 2111 and at least one auxiliary subpixel 2112.

In this embodiment, most of the light emitted by the main sub-pixel 2111 is emitted perpendicular to the light emitting surface of the display panel, most of the light emitted by the auxiliary sub-pixel 2112 is not emitted perpendicular to the light emitting surface of the display panel, and the light emitting surface of the main sub-pixel 2111 and the light emitting surface of the auxiliary sub-pixel 2112 together form a three-dimensional surface of the sub-pixels, so that the light emitted by the formed pixel group and not perpendicular to the light emitting surface of the display panel can be increased, thereby relatively improving the light emitting brightness of the pixel group at the non-normal viewing angle, further reducing the brightness deviation with the light emitted by other pixel groups in the pixel unit, improving the color cast of the display panel at the non-normal viewing angle, and improving the display effect.

It should be noted that fig. 6 only shows an enlarged schematic structure diagram of a pixel group including a stereoscopic surface, in an actual product, the main sub-pixel 2111 and each of the auxiliary sub-pixels 2112 may be separated by a pixel defining layer, and the distance between the main sub-pixel 2211 and the auxiliary sub-pixel 2212 is small, so as to meet the size requirement of forming a pixel group, that is, the light emitting surfaces of the main sub-pixel 2211 and the auxiliary sub-pixel 2212 may form a stereoscopic surface of a pixel group as a whole, thereby realizing the adjustment of the light emitting brightness of the sub-pixel emitting light of a color.

It is understood that fig. 6 only exemplarily shows one possible display panel structure, in fig. 6, the light emitting surfaces of the main sub-pixel 2211 and the auxiliary sub-pixel 2212 may be both planar, and accordingly, the three-dimensional surface forming the corresponding sub-pixel is composed of a plurality of planar surfaces. Fig. 7 is a schematic cross-sectional structure view of another display panel according to an embodiment of the present invention, referring to fig. 7, light emitting surfaces of the main subpixel 2211 and the auxiliary subpixel 2212 may also be arc surfaces, when the main subpixel 2211 and the auxiliary subpixel 2212 are spliced together, the light emitting surfaces of the main subpixel 2211 and the auxiliary subpixel 2212 may form a large arc surface, and at this time, a three-dimensional surface forming a corresponding subpixel is an arc surface. The present embodiment does not limit the specific shape, the concave-convex shape and the forming manner of the light emitting surfaces of the main sub-pixel 2211 and the auxiliary sub-pixel 2212, as long as the light emitting surfaces of the main sub-pixel 2211 and the auxiliary sub-pixel 2212 can form a three-dimensional surface of the corresponding sub-pixel.

Fig. 8 is a schematic cross-sectional structure view of another display panel provided in an embodiment of the present invention, and referring to fig. 8, on the basis of the above technical solution, optionally, the display panel further includes a substrate 10 and a plurality of light emitting units 50 corresponding to the plurality of pixel units 20 one to one, the plurality of light emitting units 50 are located on one side of the substrate, each light emitting unit 50 includes a plurality of light emitting layers, each light emitting layer includes at least one sub-pixel emitting light of one color, and a surface of one side of at least one of the plurality of light emitting layers, which is far away from the substrate, and/or a surface of one side of the plurality of light emitting layers, which is close to the substrate, includes a first stereoscopic surface.

Referring to fig. 8, in detail, the light emitting unit 50 may include at least one first light emitting layer 51, one second light emitting layer 52, and one third light emitting layer 53, wherein the light emitting colors of the first light emitting layer 51, the second light emitting layer 52, and the third light emitting layer 53 are different, for example, the light emitting colors of the first light emitting layer 51, the second light emitting layer 52, and the third light emitting layer 53 are red, green, and blue, respectively, accordingly, the first light emitting layer 51 includes a light emitting layer first sub-pixel 211 emitting red light, the second light emitting layer 52 includes a second sub-pixel 221 emitting green light, the third light emitting layer 53 includes a third sub-pixel 231 emitting blue light, and, as shown in fig. 8, the first sub-pixel 211 forms the first pixel group 21, the second sub-pixel 221 forms the second pixel group 22, and the third sub-pixel 231 forms the third pixel group 23. As described in the above embodiments, in the embodiments of the present invention, each pixel group includes only the light emitting material layer emitting light of the same color, and correspondingly, the sub-pixel includes only the light emitting material layer emitting light of one color. Each light-emitting layer further includes a light-emitting functional layer, specifically, the light-emitting functional layer includes a multilayer structure formed by a hole injection layer, a hole transport layer, an electron injection layer, and the like, for example, in the display panel structure shown in fig. 8, the first film layer structure 511 may represent the electron injection layer and the electron transport layer arranged from the substrate 10 to the sub-pixel direction, and the second film layer structure 512 may represent the hole injection layer and the hole transport layer arranged from the sub-pixel to the substrate 10 direction; or the first film structure 511 may represent a hole injection layer and a hole transport layer arranged in a direction from the substrate 10 to the sub-pixel, and the second film structure 512 may represent an electron injection layer and an electron transport layer arranged in a direction from the sub-pixel to the substrate 10. When the surface of one side of the pixel group includes a solid surface, the surface of one side of the light emitting layer, which is far away from the substrate and/or the surface of one side of the light emitting layer, which is close to the substrate, at the corresponding position of the pixel group includes a first solid surface corresponding to the solid surface of the pixel group, specifically, referring to fig. 8, when the surface of the first pixel group 21, which is far away from the substrate 10, includes a solid surface, the surface of the first film structure 511 of the light emitting layer 51, which is far away from the substrate 10, includes a first solid surface, and the surfaces of the second film structure 512 of the light emitting layer 51, which are close to the side of the substrate 10 and the side of the second film structure 512 of the light emitting layer 51, which is far away from the substrate 10, both include a first solid surface, so as to ensure that the surface of the whole light emitting layer 51, which is far away from the substrate 10, includes a solid surface, and further increase the light emitted by the light emitting layer 51 and is not perpendicular to the light emitting surface of the display panel under a non-normal viewing angle, and further, the brightness deviation of emergent light of other pixel groups in the pixel unit is reduced, so that the problem of color cast of the display panel under a non-normal viewing angle is improved.

Fig. 9 is a schematic cross-sectional structure view of another display panel according to an embodiment of the present invention, and referring to fig. 9, on the basis of the above technical solution, optionally, the plurality of light emitting units further include a plurality of first electrodes 31 corresponding to the plurality of light emitting layers one to one, the plurality of light emitting layers are respectively disposed on one sides of the plurality of first electrodes 31 far away from the substrate 10, and at least one side surface of the first electrode 31 corresponding to one of the light emitting layers, which is close to the light emitting layer, includes a second three-dimensional surface.

Referring to fig. 9, the light emitting unit 50 further includes a first electrode layer 30 and a second electrode layer 40, the pixel unit 20 is located between the first electrode layer 30 and the second electrode layer 40, the first electrode layer 30 is located between the substrate 10 and the pixel unit 20, the first electrode layer 30 includes a plurality of first electrodes 31 disposed in one-to-one correspondence with the light emitting layers, the first electrodes 31 are insulated from each other, and the second electrode layer 40 covers the pixel unit 20 over the whole surface. The first electrode layer 30 is a total reflection electrode layer, generally an anode layer, and may have a three-layer structure, wherein the material of the first layer and the third layer may be a metal oxide, such as Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or Aluminum Zinc Oxide (AZO), and the material of the middle second layer may be a metal, such as silver or copper; the second electrode layer 40 is a semi-reflective and semi-transmissive electrode layer, typically a cathode layer, and may be ITO or a mg-ag alloy. Referring to fig. 9, taking the surface of the first pixel group 21 away from the substrate 10 as a three-dimensional surface as an example, at this time, the first electrode 31 corresponding to the light-emitting layer 51 in the first pixel group 21 has a surface adapted to the three-dimensional surface of the first pixel group 21, i.e. a second three-dimensional surface, and due to the light reflection effect of the first electrode layer 30, more light rays not perpendicular to the light-emitting surface of the display panel can be reflected, so that the brightness of the light emitted by the first pixel group 21 under a non-normal viewing angle can be further improved, and the color cast problem of the display panel can be more effectively improved.

With continuing reference to fig. 6 and fig. 7, on the basis of the above technical solution, optionally, the first electrode 31 includes a main sub-electrode 311 and at least one auxiliary sub-electrode 312, and the second three-dimensional surface is formed by combining the main sub-electrode 311 and the at least one auxiliary sub-electrode 312; also, optionally, the main sub-pixel 2111 is disposed on a side of the main sub-electrode 311 away from the substrate 10; the auxiliary sub-pixels 2112 are respectively disposed on the sides of the corresponding auxiliary sub-electrodes 312 away from the substrate 10.

Referring to fig. 6 and 7, in particular, the first electrode 31 includes a main sub-electrode 311 disposed corresponding to the main sub-pixel 2111 and an auxiliary sub-electrode 312 disposed corresponding to the auxiliary sub-pixel 2112, and the main sub-electrode 311 and the auxiliary sub-electrode 312 are insulated from each other. Thereby realizing individual control of the light emission luminance of the main subpixel 2111 and the auxiliary subpixel 2112 in the pixel group. Moreover, the main sub-electrode 311 includes a surface adapted to the main sub-pixel 2111, and the auxiliary sub-electrode 312 includes a surface adapted to the auxiliary sub-pixel 2112, for example, when the surface of the main sub-pixel 2111 close to the substrate 10 is a plane, the surface of the main sub-electrode 311 close to the main sub-pixel 2111 is also a plane, and when the surface of the auxiliary sub-pixel 2112 close to the substrate 10 is an arc, the surface of the auxiliary sub-electrode 312 close to the auxiliary sub-pixel 2112 is also an arc, so that the surfaces of the main sub-electrode 311 and the auxiliary sub-electrode 312 can also form a three-dimensional surface adapted to the three-dimensional surface of the pixel group, and due to the light reflection effect of the main sub-electrode 311 and the auxiliary sub-electrode 312, more light rays not perpendicular to the light exit surface of the display panel can be reflected, thereby further improving the luminance of the light emitted by the first pixel group 21 under a non-normal viewing angle, and more effectively improving the color cast problem of the display panel.

With continued reference to fig. 6 and 7, based on the above technical solution, the display panel further includes a substrate 10, a surface of the main sub-pixel 2111 close to the substrate 10 and/or a surface far from the substrate 10 is parallel to the substrate 10, an included angle θ between a surface of the auxiliary sub-pixel 2112 close to the substrate 10 and/or a surface far from the substrate 10 and the substrate 10 is greater than 0, a surface of the main sub-pixel 2111 close to the substrate 10 and a surface of the auxiliary sub-pixel 2112 close to the substrate 10 form a solid plane, and/or a surface of the main sub-pixel 2111 far from the substrate 10 and a surface of the auxiliary sub-pixel 2112 far from the substrate 10 form a solid plane.

Specifically, as the display panel is often viewed by human eyes under the front viewing angle, the surface of the main sub-pixel 2111 close to the substrate 10 and/or the surface far away from the substrate 10 are parallel to the substrate 10, and especially when the surface of the main sub-pixel 2111 close to the substrate 10 and the surface far away from the substrate 10 are both parallel to the substrate 10, the light emitting amount perpendicular to the light emitting surface of the display panel can be ensured, so that the light entering the human eyes at the front viewing angle is not too little, and the good display effect of the front viewing angle line display panel is ensured. Moreover, the included angle θ between the surface of the auxiliary sub-pixel 2112 close to the substrate 10 and/or the surface of the auxiliary sub-pixel 2112 far from the substrate 10 and the substrate 10 is larger than 0, the surface of the main sub-pixel 2111 close to the substrate 10 and the surface of the auxiliary sub-pixel 2112 close to the substrate 10 form a three-dimensional surface, and/or the surface of the main sub-pixel 2111 far from the substrate 10 and the surface of the auxiliary sub-pixel 2112 far from the substrate 10 form a three-dimensional surface, so that more light rays which are not perpendicular to the light-emitting surface of the display panel can be emitted by the auxiliary sub-pixel 2112, more light rays which can enter human eyes under a non-normal viewing angle can be ensured, more light rays which are not perpendicular to the light-emitting surface of the display panel and emitted by a pixel group comprising the three-dimensional surfaces of the main sub-pixel 2111 and the auxiliary sub-pixel 2112 are increased, thereby relatively increasing the luminance of the pixel group under the non-normal viewing angle, and further reducing the luminance deviation of the light emitted by other pixel groups in the pixel unit, the problem of color cast of the display panel under a non-normal viewing angle is improved.

It should be noted that, in the above embodiments, the three-dimensional surface included on the surface of one side of the pixel group is taken as a convex surface for example, fig. 10 is a schematic cross-sectional structure diagram of another display panel provided in the embodiments of the present invention, referring to fig. 10, the display panel includes a plurality of pixel units 20, and the pixel units 20 include a first pixel group 21 emitting light with different colors, a second pixel group 22 and a third pixel group 23 for example, where the first pixel group 21 includes a first sub-pixel 211, the second pixel group 22 includes a second sub-pixel 221, the third pixel group includes a third sub-pixel 231, and the surface of the first pixel group 21 on the side away from the substrate includes a three-dimensional surface, which is a concave surface, and when the three-dimensional surface is a concave surface, the effect of improving color shift in the above embodiments of the present invention is also achieved, and details are omitted here. Fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device 100 may include the display panel 200 according to any embodiment of the present invention. The display device may be a mobile phone as shown in fig. 11, or may be a computer, a television, an intelligent wearable display device, and the like, which is not particularly limited in this embodiment of the present invention.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, comprising:

a plurality of pixel units, each of said pixel units comprising a plurality of pixel groups, each of said pixel groups comprising at least one sub-pixel emitting light of one color;

wherein at least one side surface of at least one of the plurality of pixel groups comprises a solid surface;

the at least one pixel group comprises a main sub-pixel and at least one auxiliary sub-pixel; the display panel further comprises a substrate, the surface of the main sub-pixel close to the substrate and/or the surface far away from the substrate is parallel to the substrate, the included angle between the surface of the auxiliary sub-pixel close to the substrate and/or the surface far away from the substrate and the substrate is greater than 0, the surface of the main sub-pixel close to the substrate and the surface of the auxiliary sub-pixel close to the substrate form the stereoscopic surface, and/or the surface of the main sub-pixel far away from the substrate and the surface of the auxiliary sub-pixel far away from the substrate form the stereoscopic surface;

the display panel further comprises a first electrode, wherein the first electrode comprises a main sub-electrode and an auxiliary sub-electrode, the main sub-electrode corresponds to the main sub-pixel, the auxiliary sub-electrode corresponds to the auxiliary sub-pixel, the main sub-electrode comprises a surface adaptive to the main sub-pixel, and the auxiliary sub-electrode comprises a surface adaptive to the auxiliary sub-pixel; the main sub-pixel and the auxiliary sub-pixel in the pixel group are separated by a pixel defining layer.

2. The display panel according to claim 1, wherein the display panel further comprises a substrate and a plurality of light emitting units corresponding to the plurality of pixel units one to one, the plurality of light emitting units are located on one side of the substrate, each of the light emitting units comprises a plurality of light emitting layers, each of the light emitting layers comprises at least one sub-pixel emitting light of one color, and at least one of the light emitting layers comprises a first stereoscopic surface on one side surface away from the substrate and/or on one side surface close to the substrate.

3. The display panel according to claim 2, wherein the plurality of light emitting layers correspond to the plurality of first electrodes one to one, the plurality of light emitting layers are respectively disposed on a side of the plurality of first electrodes away from the substrate, and a surface of at least one of the plurality of first electrodes corresponding to one of the plurality of light emitting layers, the surface being close to the light emitting layer, includes a second three-dimensional surface.

4. The display panel according to claim 3, wherein the main sub-pixels are disposed on a side of the main sub-electrodes away from the substrate; the auxiliary sub-pixels are respectively arranged on one sides of the corresponding auxiliary sub-electrodes far away from the substrate.

5. A display device comprising the display panel according to any one of claims 1 to 4.