Display panel and display device

Abstract

The present application discloses a display panel and a display device, wherein the display panel further includes a base substrate, a pixel definition layer, display sub-pixels, anti-peeping sub-pixels, an encapsulation layer, a light-shielding layer, and a light-scattering structure; the anti-peeping sub-pixels are arranged in the non-opening area, and at least one anti-peeping sub-pixel is arranged in a pixel; the light-shielding layer is arranged on the anti-peeping sub-pixels and is used to block the light emitted from the light-shielding layer perpendicular to the base substrate; the light-scattering structure is arranged between the anti-peeping sub-pixels and the light-shielding layer and is used to scatter part of the anti-peeping light emitted from the anti-peeping sub-pixels to the light-shielding layer and then emit it from the opening area. The present application improves the utilization rate of the anti-peeping light at a side viewing angle by adding a light-scattering structure in the area where the anti-peeping sub-pixels are located, thereby eliminating the need to change the film layer structure, thereby improving the anti-peeping effect of the display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] At present, OLED organic light-emitting display technology is gradually maturing, and as a self-luminous display technology, it is being used in more and more products. As people in modern society pay more attention to their own privacy, the anti-peeping function of the display panel has also become a necessary function of the product. Therefore, OLED anti-peeping technology has also been a hot topic of discussion recently.

[0003] One anti-peeping technology involves adding anti-peeping pixels. These pixels can be placed between two adjacent display sub-pixels. The anti-peeping light emitted by these pixels interferes with the display at wide viewing angles, thus achieving an anti-peeping effect. However, the current utilization rate of the anti-peeping light is low, resulting in poor anti-peeping effects. Summary of the Invention

[0004] The purpose of this application is to provide a display panel and a display device, which improves the utilization rate of anti-peeping light at side viewing angles by adding a light scattering structure in the area where the anti-peeping sub-pixel is located, thereby improving the anti-peeping effect of the display panel without changing the film layer structure.

[0005] The present application discloses a display panel, comprising an opening area and a non-opening area, wherein the display panel further comprises a base substrate, a pixel definition layer, a display sub-pixel, an anti-peeping sub-pixel, an encapsulation layer, a light-shielding layer and a light scattering structure; the pixel definition layer is arranged on the base substrate and is located in the non-opening area; the display sub-pixel is arranged in the opening area, and two adjacent display sub-pixels are separated by the pixel definition layer; the anti-peeping sub-pixel is arranged in the non-opening area, and at least one anti-peeping sub-pixel is arranged in a pixel, and the anti-peeping sub-pixel is separated from the display sub-pixel by the pixel definition layer; the encapsulation layer is arranged on the pixel definition layer, the display sub-pixel and the anti-peeping sub-pixel, and is used to seal the display sub-pixel and the anti-peeping sub-pixel; the light-shielding layer is arranged on the anti-peeping sub-pixel, and is used to block the light emitted from the light-shielding layer perpendicular to the base substrate; the light scattering structure is arranged between the anti-peeping sub-pixel and the light-shielding layer, and is used to scatter part of the anti-peeping light emitted from the anti-peeping sub-pixel to the light-shielding layer, and then emit it from the opening area.

[0006] Optionally, light scattering particles are provided in the light scattering structure, and the light scattering particles include inorganic particles, organic particles or composite particles; the light scattering particles are used to change the propagation direction of light so that part of the anti-peeping light emitted by the anti-peeping sub-pixel to the light-shielding layer is scattered and then emitted from the opening area.

[0007] Optionally, the light scattering structure includes a first scattering structure, which is arranged in direct contact with the light-shielding layer and is arranged between the light-shielding layer and the encapsulation layer; under the orthographic projection of the base substrate, the projection of the first scattering structure is within the projection range of the light-shielding layer.

[0008] Optionally, the cross-sectional shape of the first scattering structure is an inverted trapezoid, a semicircle, a semi-ellipse, a triangle or a rectangle; the encapsulation layer includes a first inorganic layer, an organic layer and a second inorganic layer, the first inorganic layer covers the anti-peep sub-pixel and the display sub-pixel, and the organic layer is arranged between the first inorganic layer and the second inorganic layer; the first scattering structure is arranged between the first inorganic layer and the light-shielding layer; wherein the thickness of the first scattering structure is greater than or equal to the thickness of the first inorganic layer and less than or equal to the thickness of the organic encapsulation layer.

[0009] Optionally, the encapsulation layer includes a first inorganic layer, an organic layer and a second inorganic layer, the first inorganic layer covers the anti-peep sub-pixel and the display sub-pixel, and the organic layer is arranged between the first inorganic layer and the second inorganic layer; the light scattering structure also includes a second scattering structure, and the second scattering structure is arranged between the first inorganic layer and the organic layer; under the orthographic projection of the base substrate, the projection of the second scattering structure is within the projection range of the light-shielding layer.

[0010] Optionally, the pixel definition layer is further provided with a plurality of anti-peeping openings, which are used to accommodate the anti-peeping sub-pixels; the second scattering structure is arranged in the anti-peeping opening; wherein, when the light scattering structure includes a first scattering structure and a second scattering structure, the width of the second scattering structure is smaller than the width of the first scattering structure, and the organic encapsulation layer is provided with a groove corresponding to the anti-peeping sub-pixel area, and the first scattering structure is arranged in the groove.

[0011] Optionally, the anti-peeping sub-pixel includes an anti-peeping light-emitting unit, the side wall of the anti-peeping opening has a preset inclination angle to form an inclined surface, the anti-peeping light-emitting unit extends from the bottom of the anti-peeping opening to the side wall of the anti-peeping opening, and the anti-peeping light of the anti-peeping light-emitting unit in the area where the side wall is located is emitted toward the opening area; under the orthographic projection of the base substrate, the second scattering structure does not overlap with the side wall of the anti-peeping opening.

[0012] Optionally, the anti-peeping sub-pixel includes an anti-peeping light-emitting unit, which includes a bottom electrode, a light-emitting layer and a top electrode, the light-emitting layer is arranged between the bottom electrode and the top electrode, and the bottom electrode is arranged below the light-emitting layer; wherein a circular protrusion is provided on the bottom electrode, and the circular protrusion is provided in the middle area of ​​the bottom electrode for emitting the anti-peeping light of the anti-peeping light-emitting unit.

[0013] Optionally, the display panel further includes a color filter layer, which includes a plurality of color filter portions and a plurality of light-transmitting portions; the color filter portions are arranged in a one-to-one correspondence with the display sub-pixels, and the shading layer, the light-transmitting portions and the color filter portions are arranged in the same layer; a light-transmitting portion is arranged between adjacent color filter portions and the shading layer.

[0014] The present application also discloses a display device, comprising a driving circuit and the above-mentioned display panel, wherein the driving circuit is used to drive the display panel to display.

[0015] The present application adds a light scattering structure to the area where the anti-peeping sub-pixel is located. When the anti-peeping sub-pixel emits anti-peeping light, the light scattering structure scatters the anti-peeping light emitted by the anti-peeping sub-pixel, so that as much light as possible is no longer emitted perpendicular to the substrate, thereby forming a divergent effect. In this case, most of the anti-peeping light emitted by the anti-peeping sub-pixel is no longer blocked by the light-shielding layer, but can be emitted from the adjacent opening area to enhance the number and intensity of anti-peeping light emitted by the anti-peeping sub-pixel from the opening area, thereby improving the light utilization rate of the anti-peeping sub-pixel. In the present application, by adding a light scattering structure, there is no need to make additional film layer improvements, etc., thereby improving the problem of weak anti-peeping effect caused by insufficient anti-peeping light of the anti-peeping sub-pixel at a lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0017] Figure 1 is a schematic top view of a display panel according to the first embodiment of the present application;

[0018] Figure 2 is a schematic cross-sectional view of a display panel according to a first embodiment of the present application;

[0019] Figure 3Schematic diagram of the luminous intensity of the anti-peeping sub-pixel without a light scattering structure and the display sub-pixel at different angles in the present application;

[0020] Figure 4 is a schematic diagram of a display panel according to a second embodiment of the present application;

[0021] Figure 5 is a schematic diagram of a pixel arrangement according to a second embodiment of the present application;

[0022] Figure 6 is a schematic diagram of a first display panel according to a third embodiment of the present application;

[0023] Figure 7 is a schematic diagram of a second display panel of the third embodiment of the present application;

[0024] Figure 8 is a schematic diagram of a first display panel according to a fourth embodiment of the present application;

[0025] Figure 9 is a schematic diagram of a second display panel of the fourth embodiment of the present application;

[0026] Figure 10 is a schematic diagram of a display device of the present application.

[0027] Among them, 100, display panel; 101, opening area; 102, non-opening area; 111, base substrate; 112, pixel definition layer; 113, anti-peep opening; 120, display sub-pixel; 130, anti-peep sub-pixel; 131, bottom electrode, 131a, circular protrusion; 132, light-emitting layer; 133, top electrode; 140, encapsulation layer; 141, first inorganic layer; 142, organic layer; 143, second inorganic layer; 150, light-shielding layer; 160, light scattering structure; 161, first scattering structure; 162, second scattering structure; 170, color filter layer; 171, color filter part; 172, light-transmitting part; 200, display device; 210, driving circuit. DETAILED DESCRIPTION

[0028] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative. However, the present application can be implemented in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0029] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, features defined as "first" and "second" may explicitly or implicitly include one or more of such features; "multiple" means two or more. In addition, terms indicating orientation or positional relationships such as "upper", "lower", "left", "right", "vertical", and "horizontal" are based on the orientation or relative positional relationships shown in the accompanying drawings and are only for the convenience of describing a simplified description of this application, rather than indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0030] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0031] Figure 1 is a schematic top view of a display panel according to the first embodiment of the present application, Figure 2 is a schematic cross-sectional view of a display panel according to the first embodiment of the present application, see Figures 1 to 2 As shown, the present application discloses a display panel 100, which includes an opening area 101 and a non-opening area 102. The display panel 100 also includes a base substrate 111, a pixel definition layer 112, a display sub-pixel 120, an anti-peeping sub-pixel 130, an encapsulation layer 140, a light shielding layer 150 and a light scattering structure 160; the pixel definition layer 112 is arranged on the base substrate 111 and is located in the non-opening area 102; the display sub-pixel 120 is arranged in the opening area 101, and two adjacent display sub-pixels are separated by the pixel definition layer 112; the anti-peeping sub-pixel 130 is arranged in the non-opening area 102, and at least one anti-peeping sub-pixel 130 is arranged in one pixel. 0, the anti-peeping sub-pixel 130 and the display sub-pixel 120 are separated by a pixel definition layer 112; the encapsulation layer 140 is arranged on the pixel definition layer 112, the display sub-pixel 120, and the anti-peeping sub-pixel 130, and is used to seal the display sub-pixel 120 and the anti-peeping sub-pixel 130; the light-shielding layer 150 is arranged on the anti-peeping sub-pixel 130, and is used to block the outgoing light of the light-shielding layer 150 perpendicular to the base substrate 111; the light scattering structure 160 is arranged between the anti-peeping sub-pixel 130 and the light-shielding layer 150, and is used to scatter part of the anti-peeping light emitted from the anti-peeping sub-pixel 130 to the light-shielding layer 150, and then emit it from the opening area 101.

[0032] The present application adds a light scattering structure 160 to the area where the anti-peeping sub-pixel 130 is located. When the anti-peeping sub-pixel 130 emits anti-peeping light, the light scattering structure 160 scatters the anti-peeping light emitted by the anti-peeping sub-pixel 130, so that as much light as possible is no longer emitted perpendicular to the base substrate 111, thereby forming a divergent effect. In this case, most of the anti-peeping light emitted by the anti-peeping sub-pixel 130 is no longer blocked by the light-shielding layer 150, but can be emitted from the adjacent opening area 101, thereby increasing the amount and intensity of the anti-peeping light emitted by the anti-peeping sub-pixel 130 from the opening area 101, thereby improving the light utilization rate of the anti-peeping sub-pixel 130. In the present application, by adding the light scattering structure 160, there is no need for additional film layer improvements, etc., thereby improving the problem of weak anti-peeping effect caused by insufficient anti-peeping light of the anti-peeping sub-pixel 130 at a low cost.

[0033] In this embodiment, light-scattering particles are disposed within the light-scattering structure 160. These particles may include inorganic, organic, or composite particles. These particles are used to redirect light, causing a portion of the privacy-preventing light emitted from the privacy-preventing sub-pixel 130 to the light-shielding layer 150 to be scattered and then emitted from the opening 101. The main body of the light-scattering structure 160 is formed of an organic material, doped with the light-scattering particles to achieve the light-scattering effect of the light-scattering structure 160. It should be understood that the light-scattering particles are evenly distributed within the organic material to achieve uniform light dispersion.

[0034] Specifically, the light-scattering particles include inorganic particles, organic particles, or composite particles. Inorganic particles can include one or a mixture of titanium oxide, silicon oxide, zinc oxide, etc., while organic particles can include one or a mixture of silicone microspheres, polyacrylic acid series, polymethyl methacrylate (PMMA), etc. Composite particles can be a mixture of one or more inorganic and organic particles, and have a refracting effect on light, causing it to scatter after passing through the light-scattering structure 160.

[0035] Generally speaking, with the direction perpendicular to the base substrate 111 as the normal direction of the display panel 100, the display angle of the wide-angle display panel 100 is about 160 degrees, that is, the angle between the outgoing light and the normal direction of the display panel 100 can be up to 80 degrees. The display viewing angle of the general display panel 100 is also about 120, that is, the angle between the outgoing light and the normal direction of the display panel 100 can be up to 60 degrees. For privacy protection, interference needs to be performed when the angle between the outgoing light and the normal direction of the display panel 100 exceeds 25 degrees. Even if the angle between the outgoing light and the normal direction of the display panel 100 is in the range of 0 to 25 degrees, it is a normal viewing angle, and the angle exceeding 25 degrees is an anti-peeping viewing angle. The light emitted from the anti-peeping sub-pixel 130 in the range exceeding 25 degrees causes the display sub-pixels under the anti-peeping viewing angle to have different grayscales and mixed colors, making it impossible to see the displayed content under the anti-peeping viewing angle, thus achieving privacy protection. However, since most of the vertically emitted light from the anti-peeping sub-pixel 130 is blocked by the light-shielding layer 150, the light utilization efficiency under the anti-peeping viewing angle is low. It is worth mentioning that the light-shielding layer 150 needs to completely block the vertically emitted light from the anti-peeping sub-pixel 130. Therefore, the area of ​​the light-shielding layer 150 is larger than the light-emitting area of ​​the anti-peeping sub-pixel 130. However, the area of ​​the light-shielding layer 150 can be reduced to be smaller than the area of ​​the non-opening area 102. That is, on the orthographic projection of the base substrate 111, the projection of the light-shielding layer 150 is within the projection range of the pixel definition layer 112. Therefore, after refraction, the anti-peeping light can be emitted from the opening area 101 or the area within the non-opening area 102 that is not blocked by the light-shielding layer 150.

[0036] Figure 3 This is a schematic diagram of the luminous intensity of the anti-peep sub-pixel without light scattering structure and the display sub-pixel at different angles of the present application, see Figure 3 As shown, the horizontal axis represents the angle between the outgoing light of the anti-peeping sub-pixel 130 and the display sub-pixel 120 and the normal of the display panel 100, and the vertical axis represents the intensity of the outgoing light of the anti-peeping sub-pixel 130 and the display sub-pixel 120 at this angle. Currently, when the anti-peeping sub-pixel 130 and the display sub-pixel 120 both adopt the structure of a light-emitting unit and are respectively formed at the opening position of the pixel definition layer 112, that is, when the light-emitting film layer of the anti-peeping sub-pixel 130 and the light-emitting film layer of the display sub-pixel 120 are simultaneously evaporated, the luminous efficiency of the two is similar. When the above-mentioned angle gradually increases, the luminous intensity of the anti-peeping sub-pixel 130 also gradually decreases. However, since the present application utilizes the outgoing light of the anti-peeping sub-pixel 130 at the anti-peeping angle, especially the anti-peeping light between 25 degrees and 45 degrees is seriously insufficient, resulting in a poor anti-peeping effect.

[0037] Continue to see Figure 2As shown, in one embodiment, the light scattering structure 160 includes a first scattering structure 161 . The first scattering structure 161 is directly in contact with the light shielding layer 150 , and the first scattering structure 161 is disposed between the light shielding layer 150 and the encapsulation layer 140 .

[0038] In this embodiment, the first scattering structure 161 is disposed below the light-shielding layer 150 and in direct contact with it. The primary function of this first scattering structure 161 is to divert light emitted from the anti-peeping sub-pixel 130 perpendicular to the substrate 111 toward the light-shielding layer 150, or incident at other angles, and then disperse it for emission. In other words, due to the scattering effect of the first scattering structure 161, light from the anti-peeping sub-pixel 130 is effectively redirected to the first scattering structure 161, where it forms a new privacy light source. This light-scattering light source is located closest to the light-shielding layer 150. This is equivalent to moving the privacy sub-pixel 130 from below the encapsulation layer 140. The light scattered by the first scattering structure 161 allows the privacy light source to be moved below the light-shielding layer 150, achieving improved light shielding and privacy protection. Furthermore, this embodiment allows more light from the first scattering structure 161 to enter the privacy viewing angle, enhancing the privacy protection effect. The present application adds a light scattering structure in the encapsulation layer 140 to enhance the anti-peeping light of the anti-peeping sub-pixel 130 at an angle of 25 to 45 degrees.

[0039] In the orthographic projection of the base substrate 111 , the projection of the first scattering structure 161 is within the projection range of the light shielding layer 150 .

[0040] Generally speaking, considering the issue of light leakage from the anti-peeping sub-pixel 130, the light-shielding layer 150 needs to cover the anti-peeping sub-pixel 130, thereby blocking the vertically emitted light from the anti-peeping sub-pixel 130 and avoiding interference with the normal-viewing light. Therefore, in the orthographic projection of the base substrate 111, the area of ​​the anti-peeping sub-pixel 130 should be smaller than that of the light-shielding layer 150, and the area of ​​the first scattering structure 161 should also be smaller than that of the light-shielding layer 150.

[0041] Continue to see Figure 2 As shown, in this embodiment, the cross-section of the first scattering structure 161 is an inverted trapezoid. When forming the first scattering structure 161 , a groove is formed on the packaging layer 140 , and the groove is used to accommodate the first scattering structure 161 .

[0042] Specifically, the encapsulation layer 140 includes a first inorganic layer 141, an organic layer 142, and a second inorganic layer 143. The first inorganic layer 141 covers the privacy sub-pixel 130 and the display sub-pixel 120, and the organic layer 142 is disposed between the first and second inorganic layers 141, 143. The first inorganic layer 141 is disposed at the bottom of the encapsulation layer 140, while the second inorganic layer 143 is disposed at the top. This stacking of inorganic and organic materials seals the pixels from water and oxygen. Generally, the organic layer 142 is thicker than the first and second inorganic layers 141, 143.

[0043] In this embodiment, the first scattering structure 161 is disposed on the second inorganic layer 143. The thickness of the first scattering structure 161 is slightly greater than that of the second inorganic layer 143. A groove is formed in the organic layer 142, which is then covered by the second inorganic layer 143, and then another groove is formed in its place. The first scattering structure 161 is accommodated within this groove. Specifically, the thickness of the first scattering structure 161 can be adjusted by controlling the depth of the groove formed in the organic layer 142. It should be understood that this groove is designed only in the area corresponding to the privacy protection sub-pixel 130.

[0044] In another embodiment, the cross-sectional shape of the first scattering structure 161 may be an inverted trapezoid, a semicircle, a semi-ellipse, a triangle, or a rectangle. Different cross-sectional shapes of the first scattering structure 161 provide different light-regulating effects. For example, a first scattering structure 161 with a curved surface, such as a semicircle or a semi-ellipse, is more conducive to light emission.

[0045] Figure 4 is a schematic diagram of a display panel according to the second embodiment of the present application, see Figure 4 As shown, in this embodiment, by providing a relatively deep groove in the organic layer 142, the thickness of the first scattering structure 161 in a direction perpendicular to the base substrate 111 is greater than its width in a direction parallel to the base substrate 111. The cross-sectional shape of the first scattering structure 161 is rectangular or trapezoidal. When rectangular, it is a vertically oriented rectangle, i.e., the length of the rectangle is perpendicular to the base substrate 111. When it is a trapezoid, the thickness of the trapezoid is greater than half the sum of the upper and lower bases. Specifically, in this embodiment, by primarily increasing the thickness of the first scattering structure 161, the width of the first scattering structure 161 is reduced, thereby further reducing the width of the light shielding layer 150.

[0046] Generally speaking, in the scheme of preventing privacy by adding anti-peeping sub-pixels 130, it is necessary to set an opening in the area where the anti-peeping sub-pixel 130 is located. The setting of the opening is often the same as the opening of the normal display sub-pixel 120, so that the anti-peeping sub-pixel 130 and the display sub-pixel 120 are formed synchronously. In this way, there is a problem that the anti-peeping sub-pixel 130 occupies the area of ​​the display sub-pixel 120. For example, within a pixel, there are usually three display sub-pixels 120, and the three display sub-pixels 120 each occupy approximately one-third of the area of ​​a pixel. When the area of ​​a pixel remains unchanged, adding an anti-peeping sub-pixel 130 often causes the display sub-pixel 120 to occupy only a quarter of the area of ​​a pixel, while the anti-peeping sub-pixel 130 also occupies a quarter of the area of ​​a pixel. As a result, the anti-peeping sub-pixel 130 occupies the area of ​​the display sub-pixel 120, especially when the pixel area remains unchanged, causing the display sub-pixel 120 to become smaller, resulting in display problems.

[0047] In this embodiment, the area of ​​the privacy protection sub-pixel 130 is smaller than that of the display sub-pixel 120. By reducing the area of ​​the privacy protection sub-pixel 130, a smaller privacy protection light-emitting unit can be disposed in the non-opening area 102. The privacy protection light emitted by the privacy protection light-emitting unit is fully utilized by the first scattering structure 161, thereby enhancing the privacy protection capability at the privacy protection viewing angle without occupying the area of ​​the display sub-pixel 120.

[0048] It is worth noting that when the area of ​​the anti-peeping sub-pixel 130 is reduced, the corresponding anti-peeping light becomes weaker and the anti-peeping capability decreases. However, in this embodiment, by providing the first scattering structure 161, and the thickness of the first scattering structure 161 can reach or exceed half the distance between the light shielding layer 150 and the anti-peeping sub-pixel 130, the anti-peeping light of the anti-peeping sub-pixel 130 can be refracted by the light of the first scattering structure 161, so that most of the anti-peeping light can be received at the anti-peeping viewing angle. Therefore, even when the area of ​​the anti-peeping sub-pixel 130 is reduced, the anti-peeping light at the anti-peeping viewing angle can be enhanced.

[0049] In one embodiment, the pixel definition layer is further provided with a plurality of anti-peeping openings 113, and the anti-peeping openings 113 are used to accommodate the anti-peeping sub-pixels 130; the anti-peeping sub-pixels 130 generally include an anti-peeping light-emitting unit, which includes a bottom electrode 131, a light-emitting layer 132, and a top electrode 133, etc., and the anti-peeping light-emitting unit is provided in the anti-peeping opening 113. Generally speaking, the thickness of the pixel definition layer 112 is greater than the thickness of the anti-peeping light-emitting unit. Therefore, after the anti-peeping light-emitting unit is provided in the anti-peeping opening 113, the surface of the anti-peeping light-emitting unit away from the base substrate 111 is also lower than the surface of the pixel definition layer 112 away from the base substrate 111. After the anti-peeping light-emitting unit is formed, the first inorganic layer 141 in the encapsulation layer 140 is used to protect the anti-peeping light-emitting unit to prevent water and oxygen from invading and causing the anti-peeping light-emitting unit to fail.

[0050] It is worth mentioning that the display sub-pixel 120 in the present application generally includes a display light-emitting unit, which can be divided into a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit. The structure of the display light-emitting unit is basically the same as that of the anti-peeping light-emitting unit. The only difference is that the material of the light-emitting layer 132 is different. That is, when the light-emitting unit needs to emit light of different colors, different light-emitting layer 132 materials need to be used. For example, the red light-emitting unit needs to use a red light-emitting layer 132 material, the green light-emitting unit needs to use a green light-emitting layer 132 material, and the blue light-emitting unit needs to use a blue light-emitting layer 132 material. For the anti-peeping light-emitting unit, one or more of the red, green, or blue light-emitting layer 132 materials can be used to achieve the emission of light of the corresponding color.

[0051] Specifically, the thickness of the first scattering structure 161 can be set to a maximum such that the surface height of the first scattering structure 161 near the privacy protection sub-pixel 130 is lower than the surface height of the pixel definition layer 112 near the light shielding layer 150. This allows the privacy protection light emitted from the privacy protection light-emitting unit to enter the first scattering structure 161 as much as possible and be refracted out by the first scattering structure 161.

[0052] In another embodiment, quantum dots may be further added to the first scattering structure 161. Quantum dot materials may be used to replace the above-mentioned scattering particles or to work together with the scattering particles, so that the first scattering structure 161 becomes a new anti-peeping light source under the excitation of the light emitted by the anti-peeping sub-pixel 130. The first scattering structure 161 disposed below the light-shielding layer 150 is used as a new anti-peeping light source. Compared with the anti-peeping sub-pixel 130 disposed on the film layer where the pixel definition layer 112 is located, it will be closer to the light-shielding layer 150. Moreover, under the anti-peeping viewing angle, the human eye can see more anti-peeping light, thereby achieving a better anti-peeping effect.

[0053] Figure 5 is a schematic diagram of the pixel arrangement of the second embodiment of the present application, see Figure 5 As shown, the display panel 100 includes a plurality of pixels, each of which includes a plurality of display sub-pixels 120 and at least one anti-peeping sub-pixel 130. The anti-peeping sub-pixel 130 is disposed between two adjacent display sub-pixels 120. The display sub-pixels 120 can be divided into a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. For example, when the display sub-pixels 120 are arranged in an RGB stripe pattern, the anti-peeping sub-pixel 130 can be disposed between two display sub-pixels 120 of different colors within a pixel.

[0054] Specifically, this embodiment is applicable to an OLED (Organic Light-Emitting Diode) display panel 100 using COE (Color Filter on Encapsulation) technology. The display panel 100 further includes a color filter layer 170, which includes multiple color filter sections 171 and a black matrix. The color filter sections 171 are arranged in a one-to-one correspondence with the display sub-pixels 120, and the black matrix and the color filter sections 171 are arranged in the same layer. Adjacent color filter sections 171 are separated by the black matrix. Generally speaking, the black matrix provided in the color filter layer 170 can be used as the light shielding layer 150 in this embodiment. That is, the black matrix is ​​provided corresponding to the non-opening area 102, and the light shielding layer 150 in this embodiment is replaced by the black matrix.

[0055] In conjunction with the previous embodiment, when the display panel 100 is a display panel 100 using COE technology, the quantum dot material at the location of the anti-peeping sub-pixel 130 can also be selected. Generally speaking, different quantum dot materials can emit light of a specific color when excited by the light from the anti-peeping sub-pixel 130, thereby achieving different colors of light emission. Therefore, one or both of red or green quantum dots can be added to the first scattering structure 161 between the red sub-pixel and the green sub-pixel, one or both of red or blue quantum dots can be added to the first scattering structure 161 between the red sub-pixel and the blue sub-pixel, and one or both of green or blue quantum dots can be added to the first scattering structure 161 between the green sub-pixel and the blue sub-pixel. The above consideration is that when providing the color filter layer 170, the color filter portions 171 of different colors each have a light filtering function of a specific color. For example, if a blue quantum dot material is added to the first scattering structure 161 between the red sub-pixel and the green sub-pixel, when the blue quantum dot material emits blue light, it will be completely absorbed by the red and green filter portions, resulting in the anti-peeping light source being unable to be emitted, and the anti-peeping effect cannot be achieved.

[0056] In another embodiment, a light-transmitting portion 172 may be provided between the light-shielding layer 150 and the color filter portion 171 to prevent the color filter portion 171 from interfering with the privacy light. Specifically, the color filter layer 170 includes multiple color filter portions 171 and multiple light-transmitting portions 172; the color filter portions 171 are provided in a one-to-one correspondence with the display sub-pixels 120, the light-shielding layer 150 and the light-transmitting portions 172 are provided on the same layer as the color filter portions 171; and a light-transmitting portion 172 is provided between adjacent color filter portions 171 and the light-shielding layer 150.

[0057] In this embodiment, due to the reduction in size of the aforementioned anti-peeping sub-pixels 130, the area of ​​the light-shielding layer 150 can be further reduced. A light-transmitting portion 172 is provided between the light-shielding layer 150 and the color filter portion 171. This light-transmitting portion 172 can be formed of an organic material with high transmittance. This allows light scattered by the first scattering structure 161 to be emitted from an anti-peeping angle, achieving a better anti-peeping effect. It will be appreciated that since the light-transmitting portion 172 or the color filter portion 171 is surrounded by air, the refractive index of air is generally lower than that of the light-transmitting portion 172 or the color filter portion 171, while the refractive index of the second inorganic layer 143 is higher than that of the light-transmitting portion 172 and the color filter portion 171, further refraction of light is achieved.

[0058] Figure 6 is a schematic diagram of a first display panel of the third embodiment of the present application, Figure 7 is a schematic diagram of the second display panel of the third embodiment of the present application, see Figures 6 and 7 As shown, the present application further discloses another display panel 100 , in which the light scattering structure 160 further includes a second scattering structure 162 , which is disposed between the first inorganic layer 141 and the organic layer 142 .

[0059] In this embodiment, the second scattering structure 162 is disposed within the encapsulation layer 140, utilizing the space between the first inorganic layer 141 and the organic encapsulation layer 140 to accommodate the second scattering structure 162. Furthermore, the second scattering structure 162 is generally made of an organic material. Therefore, when the organic layer 142 is relatively thick within the encapsulation layer 140, the second scattering structure 162 has minimal impact on the encapsulation layer 140.

[0060] Under the orthographic projection of the base substrate 111 , the projection of the second scattering structure 162 is within the projection range of the light shielding layer 150 .

[0061] Considering that the second scattering structure 162 protruding from the light shielding layer 150 may easily affect the front-emitting light, thereby affecting the display effect at a normal viewing angle, in particular, in the solution where the light-transmitting portion 172 is provided between the light shielding layer 150 and the color filter portion 171, the width of the second scattering structure 162 needs to be set smaller. This ensures that the second scattering structure 162 is visible at an anti-peeping viewing angle, but is not clearly visible at a normal viewing angle.

[0062] The pixel definition layer 112 is further provided with a plurality of privacy-prevention openings 113 . The privacy-prevention openings 113 are used to accommodate the privacy-prevention sub-pixels 130 . The second scattering structures 162 are provided in the privacy-prevention openings 113 .

[0063] The second scattering structure 162 is provided primarily to account for the fact that the anti-peeping light-emitting unit primarily emits light perpendicular to the substrate 111, and the light gradually weakens at higher angles. The second scattering structure 162 improves the light emission angle of the anti-peeping light-emitting unit, increasing the intensity of the light emitted at higher angles, thereby improving the light intensity emitted by the anti-peeping sub-pixel 130 at the anti-peeping viewing angle.

[0064] In which, when the light scattering structure 160 includes a first scattering structure 161 and a second scattering structure 162, the width of the second scattering structure 162 is smaller than the width of the first scattering structure 161, the organic encapsulation layer 140 is provided with a groove corresponding to the anti-peep sub-pixel 130 area, and the first scattering structure 161 is provided in the groove.

[0065] In one embodiment, the second scattering structure 162 can be used in combination with the first scattering structure 161 or used alone. When used in combination with the first scattering structure 161, the second scattering structure 162 has a stronger anti-peeping light scattering capability for the anti-peeping sub-pixel 130.

[0066] Figure 8 is a schematic diagram of the first display panel of the fourth embodiment of the present application, see Figure 8 As shown, in this embodiment, in addition to adding the above-mentioned light scattering structure 160, further improvements can be made to the anti-peeping light-emitting unit.

[0067] In one embodiment, the anti-peeping sub-pixel 130 includes an anti-peeping light-emitting unit. The sidewall of the anti-peeping opening 113 has a preset tilt angle to form an inclined surface. The anti-peeping light-emitting unit extends from the bottom of the anti-peeping opening 113 to the sidewall of the anti-peeping opening 113. The anti-peeping light of the anti-peeping light-emitting unit located in the area where the sidewall is located is emitted toward the opening area 101.

[0068] In this solution, by also arranging the bottom electrode 131, the light-emitting layer 132 and the top electrode 133 of the anti-peeping light-emitting unit on the side wall of the anti-peeping opening 113, the anti-peeping light-emitting unit can also emit light on the side wall of the anti-peeping opening 113, thereby improving the light output intensity of the anti-peeping light-emitting unit under the anti-peeping viewing angle.

[0069] It is understandable that the privacy-prevention light-emitting unit does not require the same high output brightness and brightness adjustability as the light-emitting unit of the display sub-pixel 120. Relatively speaking, the display sub-pixel 120 requires higher standards. The privacy-prevention light-emitting unit of the privacy-prevention sub-pixel 130 primarily functions to emit privacy-prevention light. Even if the privacy-prevention light-emitting unit is formed on the sidewall of the privacy-prevention opening 113, the effect on the light emitted by the privacy-prevention light-emitting unit is limited.

[0070] Considering that the light emitted from the light-emitting layer 132 on the sidewall of the privacy-protected opening 113 is emitted at an angle relative to the base substrate 111, the component perpendicular to the base substrate 111 is relatively small. Therefore, this portion of the emitted light does not require scattering by the second scattering structure 162. Therefore, in the orthographic projection of the base substrate 111, the second scattering structure 162 does not overlap with the sidewall of the privacy-protected opening 113.

[0071] Figure 9 is a schematic diagram of the second display panel of the fourth embodiment of the present application, see Figure 9 As shown, the anti-peeping sub-pixel 130 includes an anti-peeping light-emitting unit, which includes a bottom electrode 131, a light-emitting layer 132 and a top electrode 133. The light-emitting layer 132 is arranged between the bottom electrode 131 and the top electrode 133, and the bottom electrode 131 is arranged below the light-emitting layer 132; wherein a circular protrusion 131a is provided on the bottom electrode 131, and the circular protrusion 131a is provided in the middle area of ​​the bottom electrode 131, for emitting the anti-peeping light of the anti-peeping light-emitting unit.

[0072] In this embodiment, which is applicable to a solution in which a first scattering structure 161 is separately provided, a protrusion is provided on the bottom electrode 131 of the anti-peeping light-emitting unit. When the light-emitting layer 132 emits light, the reflective effect of the protrusion can change the distribution of the emitted light of the anti-peeping light-emitting unit, so that the light at a vertical emission angle of the anti-peeping light-emitting unit is weaker, while the light emitted at a certain angle (towards the normal direction of the base substrate 111) is enhanced, thereby achieving enhancement of the anti-peeping light at an anti-peeping viewing angle and improving the anti-peeping effect.

[0073] Generally speaking, the anti-peeping light-emitting unit of the anti-peeping sub-pixel 130 and the light-emitting unit of the display sub-pixel 120 can be driven by the pixel driving layer. Each display sub-pixel 120 can be driven on and off separately by the pixel active switch, while the anti-peeping sub-pixel 130 can be controlled uniformly, that is, the bottom electrodes 131 and top electrodes 133 of multiple anti-peeping light-emitting units are connected separately and controlled uniformly.

[0074] Figure 10 is a schematic diagram of the display device of this application, see Figure 10 As shown, the present application further discloses a display device, wherein the display device 200 includes a driving circuit 210 and the display panel 100 in any of the above embodiments, wherein the driving circuit 210 is used to drive the display panel 100 to display.

[0075] It should be noted that the inventive concept of this application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the various embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the various embodiments or technical features are combined, the original technical effects will be enhanced.

[0076] The above content is a further detailed description of the present application in conjunction with specific optional implementation methods, and the specific implementation of the present application cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, they can make several simple deductions or substitutions without departing from the concept of the present application, which should be considered to fall within the scope of protection of the present application.

Claims

1. A display panel, characterized in that: The display panel includes an opening area and a non-opening area, and further includes: substrate; A pixel definition layer is provided on the base substrate and is located in the non-opening area; Display sub-pixels are arranged in the opening area, and two adjacent display sub-pixels are separated by the pixel definition layer; An anti-peeping sub-pixel is arranged in the non-opening area, at least one anti-peeping sub-pixel is arranged in one pixel, and the anti-peeping sub-pixel is separated from the display sub-pixel by a pixel definition layer; an encapsulation layer, disposed on the pixel definition layer, the display sub-pixel, and the anti-peeping sub-pixel, and used for sealing the display sub-pixel and the anti-peeping sub-pixel; a light shielding layer, disposed on the anti-peeping sub-pixel, for shielding the light emitted from the light shielding layer perpendicular to the base substrate; and a light scattering structure, disposed between the anti-peeping sub-pixel and the light shielding layer, for scattering a portion of the anti-peeping light emitted from the anti-peeping sub-pixel to the light shielding layer and then emitting the light from the opening area; Light scattering particles are provided in the light scattering structure, and the light scattering particles include inorganic particles, organic particles, or composite particles; the light scattering particles are used to change the propagation direction of light, so that part of the anti-peeping light emitted by the anti-peeping sub-pixel to the light shielding layer is scattered and then emitted from the opening area; The encapsulation layer includes a first inorganic layer, an organic layer, and a second inorganic layer, wherein the first inorganic layer covers the anti-peeping sub-pixel and the display sub-pixel, and the organic layer is disposed between the first inorganic layer and the second inorganic layer; The light scattering structure includes a first scattering structure, which is directly in contact with the light shielding layer and disposed between the light shielding layer and the encapsulation layer; under the orthographic projection of the base substrate, the projection of the first scattering structure is within the projection range of the light shielding layer; The thickness of the first scattering structure in a direction perpendicular to the substrate is greater than the width in a direction parallel to the substrate, and the surface height of the first scattering structure near the anti-peeping sub-pixel is lower than the surface height of the pixel definition layer near the light shielding layer; The light scattering structure further includes a second scattering structure, which is arranged between the first inorganic layer and the organic layer; under the orthographic projection of the base substrate, the projection of the second scattering structure is within the projection range of the light shielding layer; The first scattering structure is used to diverge the light emitted from the anti-peeping sub-pixel to the light shielding layer and then emit it out, so as to enhance the anti-peeping light of the anti-peeping sub-pixel at an angle of 25 degrees to 45 degrees.

2. The display panel according to claim 1, wherein: The pixel definition layer is further provided with a plurality of anti-peeping openings, and the anti-peeping openings are used to accommodate the anti-peeping sub-pixels; The second scattering structure is arranged in the anti-peep opening; When the light scattering structure includes a first scattering structure and a second scattering structure, the width of the second scattering structure is smaller than the width of the first scattering structure, the organic encapsulation layer is provided with a groove corresponding to the anti-peep sub-pixel area, and the first scattering structure is provided in the groove.

3. The display panel according to claim 1 or 2, wherein: The anti-peeping sub-pixel includes an anti-peeping light-emitting unit, the sidewall of the anti-peeping opening has a preset tilt angle to form an inclined surface, the anti-peeping light-emitting unit extends from the bottom of the anti-peeping opening to the sidewall of the anti-peeping opening, and the anti-peeping light of the anti-peeping light-emitting unit located in the area where the sidewall is located is emitted toward the opening area; In an orthographic projection of the base substrate, the second scattering structure does not overlap with a sidewall of the privacy protection opening.

4. The display panel according to claim 1, wherein: The anti-peeping sub-pixel includes an anti-peeping light-emitting unit, the anti-peeping light-emitting unit includes a bottom electrode, a light-emitting layer and a top electrode, the light-emitting layer is arranged between the bottom electrode and the top electrode, and the bottom electrode is arranged below the light-emitting layer; Wherein, a circular protrusion is provided on the bottom electrode, and the circular protrusion is provided in the middle area of ​​the bottom electrode, and is used to diverge the anti-peeping light of the anti-peeping light-emitting unit.

5. The display panel according to claim 1, wherein: The display panel further includes a color filter layer, the color filter layer including a plurality of color filter portions and a plurality of light-transmitting portions; the color filter portions are arranged in a one-to-one correspondence with the display sub-pixels, and the light-shielding layer, the light-transmitting portions and the color filter portions are arranged in the same layer; A light-transmitting portion is disposed between the adjacent color filter portion and the light-shielding layer.

6. A display device, characterized in that: The device comprises a driving circuit and the display panel according to any one of claims 1 to 5, wherein the driving circuit is used to drive the display panel to display.

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