Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel further comprises a substrate, a pixel definition layer, display sub-pixels, peep-proof sub-pixels, a packaging layer, a shading layer and a light scattering structure. The anti-peeping sub-pixels are arranged in the non-opening area, at least one anti-peeping sub-pixel is arranged in one pixel, and the light shielding layer is arranged on the anti-peeping sub-pixels and used for shielding emergent light, perpendicular to the substrate, of the light shielding layer; the light scattering structure is arranged between the peep-proof sub-pixel and the light shielding layer and is used for scattering part of peep-proof light emitted to the light shielding layer by the peep-proof sub-pixel and then emitting the part of peep-proof light from the opening area. According to the display panel, the light scattering structures are additionally arranged in the areas where the peep-proof sub-pixels are located, so that the utilization rate of peep-proof light under the side view angle is increased on the basis that the film layer structure does not need to be changed, and the peep-proof effect of the display panel is improved.

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 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 is also a hot topic of discussion recently.

[0003] In an anti-peeping technology of adding anti-peeping pixels, an anti-peeping sub-pixel can be set between two adjacent display sub-pixels. The anti-peeping light emitted by the anti-peeping sub-pixel will interfere with the display effect at a large viewing angle, thereby achieving an anti-peeping effect. However, the utilization rate of the anti-peeping light is currently low, resulting in a poor anti-peeping effect. Summary of the invention

[0004] The purpose of the present application is to provide a display panel and a display device, which improves the utilization rate of anti-peeping light at a side viewing angle 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, including an opening area and a non-opening area, wherein the display panel further includes a 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 substrate and 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 one 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 shield the outgoing light of the light shielding layer perpendicular to the 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 arranged 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 the first scattering structure 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 also 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-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, wherein 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 arranged on the bottom electrode, and the circular protrusion is arranged in the middle area of ​​the bottom electrode for radiating the anti-peeping light of the anti-peeping light-emitting unit.

[0013] Optionally, the display panel also includes a color filter layer, the color filter layer 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, 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 in the area where the anti-peeping sub-pixel is located. When the anti-peeping sub-pixel emits anti-peeping light, the anti-peeping light emitted by the anti-peeping sub-pixel is scattered by the scattering effect of the light scattering structure, 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 increase 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 perform 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 relatively low 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 ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings: Figure 1 is a schematic top view of a display panel according to a first embodiment of the present application; Figure 2 is a schematic cross-sectional view of a display panel according to a first embodiment of the present application; Figure 3 It is a schematic diagram of the luminous intensity of the anti-peeping sub-pixel of the present application without a light scattering structure and the display sub-pixel at different angles; Figure 4 is a schematic diagram of a display panel according to a second embodiment of the present application; Figure 5 is a schematic diagram of a pixel arrangement of a second embodiment of the present application; Figure 6 is a schematic diagram of a first display panel of a third embodiment of the present application; Figure 7 is a schematic diagram of a second display panel of the third embodiment of the present application; Figure 8 is a schematic diagram of a first display panel of a fourth embodiment of the present application; Fig. 9 is a schematic diagram of a second display panel of a fourth embodiment of the present application; Fig.10 is a schematic diagram of a display device of the present application.

[0017] 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

[0018] 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, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0019] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "multiple" means two or more. In addition, the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. indicating orientation or positional relationships are described based on the orientation or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing the simplified description of the present 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 the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0020] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0021] Figure 1 is a schematic top view of a display panel of the first embodiment of the present application, Figure 2 is a cross-sectional schematic diagram of a display panel of the first embodiment of the present application, see Figure 1 to Figure 2 As shown, the present application discloses a display panel 100, the display panel 100 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, 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 is separated from the display sub-pixel 120 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 that is 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.

[0022] The present application adds a light scattering structure 160 in the area where the anti-peeping sub-pixel 130 is located. When the anti-peeping sub-pixel 130 emits anti-peeping light, the anti-peeping light emitted by the anti-peeping sub-pixel 130 is scattered by the scattering effect of the light scattering structure 160, so that as much light as possible is no longer emitted perpendicular to the 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, so as to increase the number 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 to perform additional film layer improvements, etc., so as to improve the problem of weak anti-peeping effect caused by insufficient anti-peeping light of the anti-peeping sub-pixel 130 at a relatively low cost.

[0023] In this embodiment, light scattering particles are arranged in the light scattering structure 160, 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 from the anti-peeping sub-pixel 130 to the light shielding layer 150 is scattered and then emitted from the opening area 101. The main body of the light scattering structure 160 is formed of organic material, and the light scattering particles are doped in the organic material, so that the light scattering structure 160 has the function of scattering light. It should be understood that the light scattering particles are evenly distributed in the organic material to achieve the function of evenly dispersing light.

[0024] Specifically, the light scattering particles include inorganic particles, organic particles or composite particles, etc. Inorganic particles can be one or a mixture of titanium oxide, silicon oxide, zinc oxide, etc., and organic particles can be one or a mixture of silicone microspheres, polyacrylic acid series, polymethyl methacrylate (PMMA), etc. Composite particles can be one or more mixed particles of inorganic particles and organic particles, which have a refractive effect on light, so that the light is scattered after passing through the light scattering structure 160.

[0025] Generally speaking, the direction perpendicular to the base substrate 111 is the normal direction of the display panel 100, and 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 reach up to 80 degrees at most. 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 reach up to 60 degrees at most. For anti-peeping, it is necessary to interfere when the angle between the outgoing light and the normal direction of the display panel 100 exceeds 25 degrees, that is, the angle between the outgoing light and the normal direction of the display panel 100 is in the range of 0 to 25 degrees as the positive viewing angle, and the range exceeding 25 degrees is the anti-peeping viewing angle. The light of the anti-peeping sub-pixel 130 is emitted in the range exceeding 25 degrees, so that the display sub-pixel under the anti-peeping viewing angle has different grayscales and mixed colors, so that the display content cannot be seen clearly under the anti-peeping viewing angle, thereby achieving anti-peeping. However, since most of the vertically emitted light of the anti-peeping sub-pixel 130 is blocked by the light shielding layer 150, the light utilization rate under the anti-peeping viewing angle is low. It is worth mentioning that the above-mentioned light shielding layer 150 needs to completely block the vertically emitted light of the anti-peeping sub-pixel 130, so the area of ​​the light shielding layer 150 is larger than the light emitting area of ​​the anti-peeping sub-pixel 130, but 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, so the above-mentioned anti-peeping light can be emitted from the opening area 101 or the area in the non-opening area 102 that is not blocked by the light shielding layer 150 after refraction.

[0026] Figure 3 is a schematic diagram of the luminous intensity of the anti-peeping sub-pixel of the present application without a light scattering structure and the display sub-pixel at different angles, 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 the angle. At present, when the anti-peeping sub-pixel 130 and the display sub-pixel 120 both adopt the structure of the light-emitting unit, and are respectively formed at the opening position of the pixel definition layer 112, that is, 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 both evaporated at the same time, 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. Since the present application uses 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.

[0027] 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 . The first scattering structure 161 is disposed between the light shielding layer 150 and the encapsulation layer 140 .

[0028] The first scattering structure 161 in this embodiment is arranged below the light shielding layer 150 and is in direct contact with the light shielding layer 150. The main function of the first scattering structure 161 is to disperse the light emitted from the anti-peeping sub-pixel 130 perpendicular to the substrate 111 to the light shielding layer 150 or the light incident on the light shielding layer 150 at other angles and then emit it. In other words, due to the scattering effect of the first scattering structure 161, the light of the anti-peeping sub-pixel 130 is actually emitted to the first scattering structure 161, so that the first scattering structure 161 forms a new anti-peeping light source, and the anti-peeping light source has the effect of light scattering and is closest to the light shielding layer 150. It is equivalent to moving the anti-peeping sub-pixel 130 from under the encapsulation layer 140, and through the scattered light of the first scattering structure 161, the anti-peeping light source is moved to under the light shielding layer 150, so as to achieve better light shielding and anti-peeping effects. Moreover, this embodiment can control more light of the first scattering structure 161 to enter the anti-peeping viewing angle, thereby improving the anti-peeping 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.

[0029] Under 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 .

[0030] Generally speaking, considering the light leakage problem of the anti-peeping sub-pixel 130, the area of ​​the light shielding layer 150 needs to cover the anti-peeping sub-pixel 130, so as to block the vertically emitted light of the anti-peeping sub-pixel 130 and avoid interfering with the normal viewing angle light. Therefore, under the orthographic projection of the base substrate 111, the area of ​​the anti-peeping sub-pixel 130 should be smaller than the area of ​​the light shielding layer 150, and the area of ​​the first scattering structure 161 is also smaller than the area of ​​the light shielding layer 150.

[0031] Continue to see Figure 2 As shown, in this solution, the cross-sectional shape 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.

[0032] 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 anti-peep sub-pixel 130 and the display sub-pixel 120, and the organic layer 142 is arranged between the first inorganic layer 141 and the second inorganic layer 143. The first inorganic layer 141 is arranged at the bottom of the encapsulation layer 140, and the second inorganic layer 143 is arranged at the top of the encapsulation layer 140. The water and oxygen sealing of the pixel is achieved by stacking the inorganic material and the organic material. Generally speaking, the thickness of the organic layer 142 will be greater than the thickness of the first inorganic layer 141 and the second inorganic layer 143.

[0033] The first scattering structure 161 of this embodiment is disposed on the second inorganic layer 143, and the thickness of the first scattering structure 161 is slightly greater than the thickness of the second inorganic layer 143. A groove is formed on the organic layer 142, and the second inorganic layer 143 covers the groove and then forms another groove at the groove position, and the first scattering structure 161 is accommodated in the groove. Specifically, the thickness of the first scattering structure 161 can be improved by controlling the depth of the groove formed on the organic layer 142. It can be understood that the groove is only designed for the area corresponding to the anti-peep sub-pixel 130.

[0034] In another embodiment, the cross-sectional shape of the first scattering structure 161 may also be an inverted trapezoid, a semicircle, a semi-ellipse, a triangle or a rectangle. The first scattering structure 161 has different cross-sectional shapes and has different light adjustment effects. For example, the first scattering structure 161 with a curved surface such as a semicircle or a semi-ellipse is more conducive to light emission.

[0035] Figure 4 is a schematic diagram of a display panel of the second embodiment of the present application, see Figure 4 As shown, in this embodiment, by providing a deep groove in the organic layer 142, the thickness of the first scattering structure 161 in the direction perpendicular to the base substrate 111 is greater than the width in the direction parallel to the base substrate 111, wherein the cross-sectional shape of the first scattering structure 161 is a rectangle or a trapezoid, and when it is a rectangle, it is a vertical rectangle, that is, the length direction of the rectangle is perpendicular to the base substrate 111. When it is a trapezoid, the thickness of the trapezoid is wider than half of the sum of the upper base and the lower base. Specifically, in this embodiment, the width of the first scattering structure 161 is reduced mainly by increasing the thickness of the first scattering structure 161, and thus the width of the light shielding layer 150 can be further reduced.

[0036] Generally speaking, in the scheme of anti-peeping 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, and 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 is formed synchronously with the display sub-pixel 120. 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, in a pixel, three display sub-pixels 120 are usually included, and the three display sub-pixels 120 each occupy about one-third of the area of ​​a pixel. When the area of ​​a pixel remains unchanged, when an anti-peeping sub-pixel 130 is added, the display sub-pixel 120 often occupies only a quarter of the area of ​​a pixel, and 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, causes the display sub-pixel 120 to become smaller, resulting in display problems.

[0037] In this embodiment, the area of ​​the anti-peeping sub-pixel 130 is smaller than that of the display sub-pixel 120. By reducing the area of ​​the anti-peeping sub-pixel 130, a smaller anti-peeping light-emitting unit can be set in the non-opening area 102, and the anti-peeping light emitted by the anti-peeping light-emitting unit is fully utilized through the first scattering structure 161, so that the anti-peeping capability under the anti-peeping viewing angle is enhanced, and the area of ​​the display sub-pixel 120 is no longer occupied.

[0038] It is worth mentioning that when the area of ​​the anti-peeping sub-pixel 130 is reduced, the corresponding anti-peeping light is weaker and the anti-peeping ability is lower. However, in this embodiment, by providing the first scattering structure 161, when the thickness of the first scattering structure 161 can reach half or more of 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 under the anti-peeping viewing angle, so that when the area of ​​the anti-peeping sub-pixel 130 is reduced, the anti-peeping light under the anti-peeping viewing angle can be enhanced.

[0039] 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, and the anti-peeping light-emitting unit includes a bottom electrode 131, a light-emitting layer 132, and a top electrode 133, etc., and the anti-peeping light-emitting unit is arranged 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 arranged 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 the anti-peeping light-emitting unit from failing due to the intrusion of water and oxygen.

[0040] 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 the red light-emitting layer 132 material, the green light-emitting unit needs to use the green light-emitting layer 132 material, and the blue light-emitting unit needs to use the 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.

[0041] Specifically, the maximum thickness of the first scattering structure 161 can make the surface height of the first scattering structure 161 close to the anti-peeping sub-pixel 130 lower than the surface height of the pixel definition layer 112 close to the light shielding layer 150. Thus, the anti-peeping light emitted from the anti-peeping light-emitting unit can enter the first scattering structure 161 as much as possible, and the first scattering structure 161 can refract the light out.

[0042] In another embodiment, quantum dots may be further added to the first scattering structure 161. The quantum dot material 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 under the shading 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 shading layer 150. In addition, under the anti-peeping viewing angle, the human eye can see more anti-peeping light, thereby achieving a better anti-peeping effect.

[0043] 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 pixel includes a plurality of display sub-pixels 120 and at least one anti-peeping sub-pixel 130, the anti-peeping sub-pixel 130 is arranged between two adjacent display sub-pixels 120, and 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 a stripe (RGB Stripe), the anti-peeping sub-pixel 130 can be arranged between two display sub-pixels 120 of different colors in one pixel.

[0044] Specifically, this embodiment is applicable to an OLED (Organic Light - Emitting Diode) display panel 100 of COE (Color Filter on Encapsulation) technology, and the display panel 100 further includes a color filter layer 170, and the color filter layer 170 includes a plurality of color filter portions 171 and a black matrix; the color filter portions 171 are arranged one-to-one with the display sub-pixels 120, and the black matrix is ​​arranged in the same layer as the color filter portions 171; and adjacent color filter portions 171 are separated by the black matrix. Generally speaking, the black matrix arranged in the color filter layer 170 can be used as the light shielding layer 150 in this embodiment, that is, the black matrix is ​​arranged corresponding to the non-opening area 102, and the light shielding layer 150 in this embodiment is replaced by the black matrix.

[0045] In combination with the previous embodiment, when the display panel 100 is a display panel 100 using COE technology, the quantum dot material at the position where the anti-peeping sub-pixel 130 is set can also be selected. Generally speaking, different quantum dot materials can emit light of a specific color under the light excitation of the anti-peeping sub-pixel 130, thereby achieving light emission of different colors. Therefore, one or two of red quantum dots 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 two of red quantum dots 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 two of green quantum dots 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 the color filter layer 170 is set, the color filter parts 171 of different colors have the filtering effect of light of specific colors respectively. For example, a blue quantum dot material is added in 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 filter part and the green filter part, resulting in the inability of the anti-peeping light source to emit and the inability to form an anti-peeping effect.

[0046] 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 anti-peeping light. Specifically, the color filter layer 170 includes a plurality of color filter portions 171 and a plurality of 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, the light-transmitting portions 172 and the color filter portions 171 are provided in the same layer; and a light-transmitting portion 172 is provided between adjacent color filter portions 171 and the light-shielding layer 150.

[0047] In this embodiment, due to the reduction of the above-mentioned anti-peeping sub-pixel 130, the area of ​​the light shielding layer 150 can be further reduced, and a light-transmitting portion 172 is provided between the light shielding layer 150 and the color filter portion 171. The light-transmitting portion 172 can be formed of an organic material and has a high transmittance. The light scattered by the first scattering structure 161 can be emitted from the anti-peeping angle to achieve a better anti-peeping effect. It can be understood that since the outside of the light-transmitting portion 172 or the color filter portion 171 is air, the refractive index of air is generally lower than that of the above-mentioned light-transmitting portion 172 or the color filter portion 171, and 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, thereby achieving further refraction of light.

[0048] 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 a second display panel of the third embodiment of the present application, see Figure 6 to Figure 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 , and the second scattering structure 162 is disposed between the first inorganic layer 141 and the organic layer 142 .

[0049] In this embodiment, the second scattering structure 162 is disposed in the encapsulation layer 140, and the space between the first inorganic layer 141 and the organic encapsulation layer 140 is used to accommodate the second scattering structure 162. In addition, the second scattering structure 162 is generally made of organic material, and when the organic layer 142 in the encapsulation layer 140 is thicker, the impact on the encapsulation layer 140 is small.

[0050] 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 .

[0051] Considering that the second scattering structure 162 is likely to affect the front emitted light when it protrudes from the light shielding layer 150, thus affecting the display effect at a normal viewing angle, in particular, for the solution of setting the light-transmitting portion 172 between the light shielding layer 150 and the color filter portion 171, it is necessary to set the width of the second scattering structure 162 to be smaller, so that the second scattering structure 162 can be seen at an anti-peeping viewing angle, but cannot be seen clearly at a normal viewing angle.

[0052] The pixel definition layer 112 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 second scattering structure 162 is disposed in the anti-peeping openings 113 .

[0053] The second scattering structure 162 is provided mainly because the light emitted by the anti-peeping light-emitting unit is mainly emitted from a direction perpendicular to the base substrate 111 to a large angle, and the emitted light gradually weakens. By providing the second scattering structure 162, the light emission angle of the anti-peeping light-emitting unit can be improved, so that the intensity of the emitted light of the anti-peeping light-emitting unit in the large angle direction is increased, thereby improving the intensity of the emitted light of the anti-peeping sub-pixel 130 at the anti-peeping viewing angle.

[0054] Among them, 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, and 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 arranged in the groove.

[0055] In one embodiment, the second scattering structure 162 can be used in combination with the first scattering structure 161 or can be used alone. When used in combination with the first scattering structure 161, the anti-peeping light scattering capability for the anti-peeping sub-pixel 130 is stronger.

[0056] Figure 8 is a schematic diagram of a 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.

[0057] In one embodiment, the anti-peeping sub-pixel 130 includes an anti-peeping light-emitting unit, the side wall 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 side wall of the anti-peeping opening 113, and the anti-peeping light of the anti-peeping light-emitting unit located in the area where the side wall is located is emitted toward the opening area 101; 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.

[0058] It is understandable that the anti-peeping light-emitting unit does not need to have high emission brightness and brightness adjustment capability like the light-emitting unit of the display sub-pixel 120. Relatively speaking, the display sub-pixel 120 requires a higher standard. The main function of the anti-peeping light-emitting unit of the anti-peeping sub-pixel 130 is to emit anti-peeping light. Even if the anti-peeping light-emitting unit is formed on the side wall of the anti-peeping opening 113, the effect on the emitted light of the anti-peeping light-emitting unit is limited.

[0059] Considering that the light emitted from the light emitting layer 132 on the side wall of the anti-peep opening 113 is emitted obliquely to the base substrate 111, the component perpendicular to the base substrate 111 is small. Therefore, this part of the emitted light does not need to be scattered by the second scattering structure 162. Therefore, under the orthographic projection of the base substrate 111, the second scattering structure 162 does not overlap with the side wall of the anti-peep opening 113.

[0060] Fig. 9 is a schematic diagram of a second display panel of the fourth embodiment of the present application, see Fig. 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, wherein 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 arranged on the bottom electrode 131, and the circular protrusion 131a is arranged in the middle area of ​​the bottom electrode 131, for radiating the anti-peeping light of the anti-peeping light-emitting unit.

[0061] In the present embodiment, which is applicable to a scheme in which the 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 emitted light at a certain angle (with the normal direction of the base substrate 111) is enhanced, thereby achieving the enhancement of the anti-peeping light at the anti-peeping viewing angle and improving the anti-peeping effect.

[0062] 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 a pixel driving layer, and each display sub-pixel 120 can be driven to switch separately by a pixel active switch, while the anti-peeping sub-pixel 130 can be uniformly controlled, that is, the bottom electrodes 131 and the top electrodes 133 of multiple anti-peeping light-emitting units are respectively connected and uniformly controlled.

[0063] Fig.10 is a schematic diagram of the display device of the present application, see Fig.10 As shown, the present application further discloses a display device, wherein the display device 200 includes a driving circuit 210 and a display panel 100 in any of the above embodiments, wherein the driving circuit 210 is used to drive the display panel 100 to display.

[0064] It should be noted that the inventive concept of the present 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 embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0065] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed 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 substrate; A pixel definition layer is disposed 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; The light scattering structure is arranged between the anti-peeping sub-pixel and the light shielding layer, and is used for scattering part of the anti-peeping light emitted from the anti-peeping sub-pixel to the light shielding layer and then emitting it from the opening area.

2. The display panel according to claim 1, characterized in that: Light scattering particles are arranged 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 from the anti-peeping sub-pixel to the light shielding layer is scattered and then emitted from the opening area.

3. The display panel according to claim 2, characterized in that: The light scattering structure comprises a first scattering structure, the first scattering structure is arranged in direct contact with the light shielding layer, and the first scattering structure 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.

4. The display panel according to claim 3, characterized in that: 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-peeping sub-pixel and the display sub-pixel, 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; 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.

5. The display panel according to claim 1 or 3, characterized in that: The encapsulation layer includes a first inorganic layer, an organic layer, and a second inorganic layer, the first inorganic layer covers the anti-peeping 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 further 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.

6. The display panel according to claim 5, characterized in that: The pixel definition layer is also 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 disposed 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-peeping sub-pixel area, and the first scattering structure is arranged in the groove.

7. The display panel according to claim 6, characterized in that: The anti-peeping sub-pixel includes an anti-peeping light-emitting unit, the side wall 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 side wall of the anti-peeping opening, and the anti-peeping light of the anti-peeping light-emitting unit located 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-peep opening.

8. The display panel according to claim 2, characterized in that: The anti-peeping sub-pixel comprises an anti-peeping light-emitting unit, the anti-peeping light-emitting unit comprises 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 arranged on the bottom electrode, and the circular protrusion is arranged in the middle area of ​​the bottom electrode, and is used to radiate the anti-peeping light of the anti-peeping light-emitting unit.

9. The display panel according to claim 4, characterized in that: The display panel further comprises a color filter layer, the color filter layer comprising 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 portions and the light-shielding layer.

10. A display device, characterized in that: It comprises a driving circuit and the display panel according to any one of claims 1 to 9, wherein the driving circuit is used to drive the display panel to display.

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