Display panel and display device

Abstract

This application provides a display panel and a display device. The display panel includes a light-emitting layer comprising multiple privacy-protected light-emitting portions and multiple non-privacy-protected light-emitting portions. A first light-shielding layer with a first privacy-protected opening is provided above the privacy-protected light-emitting portions. At least one privacy-protected light-emitting portion satisfies the relationship: 1.4 ≤ H / (P+E) ≤ 2.05. This ensures that the first light-shielding layer has sufficient height relative to the privacy-protected sub-pixel opening, effectively blocking light emitted from the privacy-protected light-emitting portion within a first preset viewing angle range. Simultaneously, it avoids excessive loss of brightness on the front side of the display panel due to an excessively narrow first privacy-protected opening or an excessively high first light-shielding layer. Therefore, the ratio of the brightness of the privacy-protected light-emitting portion within the first preset viewing angle range to the brightness at the front viewing angle is controlled below 5%, achieving the privacy function of the display panel and thus solving the problem of poor privacy protection in existing display devices.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] Although organic light-emitting diode (OLED) display panels have been widely used in the display field due to their advantages such as self-illumination, high contrast and wide viewing angle, users have put forward anti-peeping requirements for display products in specific business or security scenarios. That is, they expect the picture to be clearly visible at a frontal viewing angle, while others cannot see the screen content at a side viewing angle (such as 30° to 45° and above).

[0003] Currently, in existing display device designs, luminescent pixels are often divided into normal pixels and privacy pixels. The privacy effect is achieved by utilizing the characteristic of rapid brightness decay of privacy pixels at wide viewing angles. However, the structural parameters of privacy pixels in existing designs (such as the height of the light-shielding layer, the distance between the pixel edge and the light-shielding layer, etc.) lack systematic design, making it difficult to guarantee the balance between privacy effect and display quality. This results in the technical problem of poor privacy effect in existing display devices. Summary of the Invention

[0004] This application provides a display panel and display device to improve the technical problem of poor privacy protection in existing display devices.

[0005] This application provides a display panel, including: substrate; A pixel definition layer is disposed on one side of the substrate and has multiple privacy-protecting sub-pixel openings and multiple non-privacy-protecting sub-pixel openings; A light-emitting layer is disposed on one side of the substrate and includes a plurality of privacy-protected light-emitting portions and a plurality of non-privacy-protected light-emitting portions. The privacy-protected light-emitting portions are disposed within the privacy-protected sub-pixel openings, and the non-privacy-protected light-emitting portions are disposed within the non-privacy-protected sub-pixel openings; and A first light-shielding layer is disposed on the side of the light-emitting layer and the pixel definition layer away from the substrate, and is provided with a plurality of first privacy openings, the first privacy openings being provided corresponding to the privacy light-emitting part; Wherein, at least one of the privacy-protecting light-emitting parts satisfies the relationship: 1.4≤H / (P+E)≤2.05; Wherein, H is the vertical distance between the side of the first light-shielding layer near the substrate and the side of the pixel definition layer near the substrate; P is the size of the privacy sub-pixel opening; and E is the distance between the edge of the first privacy opening and the edge of its corresponding privacy sub-pixel opening when viewed from above on the display panel.

[0006] Optionally, in one embodiment, the plurality of privacy-protecting light-emitting parts include a first privacy-protecting light-emitting part, a second privacy-protecting light-emitting part, and a third privacy-protecting light-emitting part with different light-emitting colors; The plurality of privacy-protecting sub-pixel openings include a first privacy-protecting sub-pixel opening, a second privacy-protecting sub-pixel opening, and a third privacy-protecting sub-pixel opening. The first privacy-protecting sub-pixel opening is disposed corresponding to the first privacy-protecting light-emitting part, the second privacy-protecting sub-pixel opening is disposed corresponding to the second privacy-protecting light-emitting part, and the third privacy-protecting sub-pixel opening is disposed corresponding to the third privacy-protecting light-emitting part. The plurality of first privacy openings include a first privacy opening, a second privacy opening, and a third privacy opening. The first privacy opening is provided corresponding to the first privacy light-emitting part, the second privacy opening is provided corresponding to the second privacy light-emitting part, and the third privacy opening is provided corresponding to the third privacy light-emitting part.

[0007] Optionally, in one embodiment, the brightness of the first privacy light-emitting part is greater than the brightness of the second privacy light-emitting part and the brightness of the third privacy light-emitting part, and the first privacy light-emitting part satisfies the relationship: 1.7≤H / (P1+E1)≤2.05; Wherein, P1 is the size of the first privacy pixel opening; E1 is the distance between the edge of the first privacy opening and the edge of the first privacy pixel opening when viewed from above on the display panel.

[0008] Optionally, in one embodiment, the brightness of the second privacy light-emitting part is less than the brightness of the first privacy light-emitting part, the brightness of the second privacy light-emitting part is greater than the brightness of the third privacy light-emitting part, and the second privacy light-emitting part satisfies the relationship: 1.56≤H / (P2+E2)≤2.05; Wherein, P2 is the size of the second privacy pixel opening; E2 is the distance between the edge of the second privacy opening and the edge of the second privacy pixel opening when viewed from above on the display panel.

[0009] Optionally, in one embodiment, the brightness of the third privacy light-emitting part is less than the brightness of the first privacy light-emitting part, the brightness of the third privacy light-emitting part is less than the brightness of the second privacy light-emitting part, and the third privacy light-emitting part satisfies the relationship: 1.40≤H / (P3+E3)≤2.00; Wherein, P3 is the size of the third privacy pixel opening; E2 is the distance between the edge of the third privacy pixel opening and the edge of the third privacy pixel opening when viewed from above on the display panel.

[0010] Optionally, in one embodiment, the first privacy light-emitting part is a green privacy light-emitting part, the second privacy light-emitting part is a red privacy light-emitting part, and the third privacy light-emitting part is a blue privacy light-emitting part. Optionally, in one embodiment, the display panel further includes: A color filter layer is disposed between the pixel definition layer and the first light-shielding layer. The filter layer includes multiple color blocks and a black matrix. The black matrix has multiple light-transmitting openings, which are disposed corresponding to the non-peeping light-emitting part. The color blocks are disposed inside the light-transmitting openings. The second light-shielding layer is disposed between the first light-shielding layer and the filter layer, and has a plurality of second privacy openings, the second privacy openings being disposed corresponding to the privacy light-emitting part; The ratio of the brightness of the privacy light-emitting part within the preset viewing angle range to the brightness within the normal viewing angle is less than 1%.

[0011] Optionally, in one embodiment, the first light-shielding layer includes a first privacy shield, which is disposed around the privacy light-emitting portion, and the first privacy shield satisfies the relationship: f1 / h1>0.6; Where f1 is the width of the first privacy screen in the top view of the display panel; h1 is the vertical distance between the side of the first privacy screen near the substrate and the side of the black matrix near the substrate.

[0012] Optionally, in one embodiment, the second light-shielding layer includes a second privacy shield, which is disposed around the privacy light-emitting portion, and the second privacy shield satisfies the relationship: f2 / h2>0.7; Where f2 is the width of the second privacy screen in the top view of the display panel; h2 is the vertical distance between the side of the second privacy screen near the substrate and the side of the black matrix near the substrate.

[0013] This application also provides a display device, which includes any of the display modules described above.

[0014] The beneficial effects of the embodiments of this application are as follows: This application provides a display panel and a display device; the display panel, by setting a light-emitting layer including a plurality of privacy-proof light-emitting parts and a plurality of non-privacy-proof light-emitting parts, and setting a first light-shielding layer with a first privacy-proof opening above the privacy-proof light-emitting parts, and at least one privacy-proof light-emitting part satisfies the relationship: 1.4≤H / (P+E)≤2.05, thereby making the first light-shielding layer have sufficient height relative to the privacy-proof sub-pixel opening, which can effectively block the light emitted by the privacy-proof light-emitting parts within a first preset viewing angle range, while avoiding excessive loss of front brightness of the display panel due to the first privacy-proof opening being too narrow or the first light-shielding layer being too high. Therefore, the ratio of the brightness of the privacy-proof light-emitting parts within the first preset viewing angle range to the brightness of the front viewing angle is controlled below 5%, realizing the privacy function of the display panel, and thus solving the problem of poor privacy-proof effect of existing display devices. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the comparison display device provided in the embodiments of this application; Figure 2 Provided for the embodiments of this application Figure 1 A schematic diagram of a partial cross-section of a display device; Figure 3 This is a schematic diagram of the structure of the display panel provided in an embodiment of this application; Figure 4 This is a first partial cross-sectional schematic diagram of the display panel provided in an embodiment of this application; Figure 5 This is a second partial cross-sectional schematic diagram of the display panel provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the display device provided in the embodiment of this application. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower in the actual use or working mode of the device, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only, and features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections or connections that allow communication; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0020] The following disclosure provides many different embodiments for implementing different structures of this application. To simplify the disclosure of this application, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0021] To illustrate the principle behind the technical problem in this application, a contrast display device 1 is provided. It should be understood that this contrast display device 1 is not considered prior art in the embodiments of this application. Please refer to... Figure 1 and Figure 2 The comparison display device 1 includes a privacy unit 11 and a non-privacy unit 12. In the sharing mode, both the privacy unit 11 and the non-privacy unit 12 are lit. In the privacy mode, only the privacy unit 11 is lit to achieve privacy display.

[0022] like Figure 1As shown, the privacy unit 11 includes a red privacy sub-pixel 2B, a green privacy sub-pixel 2B, and a blue privacy sub-pixel 2B. The non-privacy unit 12 includes a red non-privacy sub-pixel 2A, a green non-privacy sub-pixel 2A, and a blue non-privacy sub-pixel 2A. In terms of film structure, a first black matrix film 13 is set around the privacy sub-pixel 2B and the non-privacy sub-pixel 2A. A second black matrix film 14 is also set around the privacy sub-pixel 2B. The first black matrix film 13 and the second black matrix film 14 have a certain outward expansion relative to the pixel definition film 15. Thus, the light emission angle of the non-privacy unit 12 is controlled by the first black matrix film 13. The first black matrix film 13 and the second black matrix film 14 block the light from the privacy unit 11 at a large angle and a wide viewing angle, thereby achieving 360-degree omnidirectional privacy.

[0023] However, in actual use, due to the significant differences in luminance among different color sub-pixels (the brightness of the green sub-pixel is greater than that of the red and blue sub-pixels), and considering that the outer dimensions of the black matrix film and the interlayer spacing of each color sub-pixel in the comparison display device 1 all use uniform parameters (such as...), Figure 2 In the current display panel 2, the opening p1 of the first black matrix film 13 and the opening p2 of the second black matrix film 14 corresponding to the privacy sub-pixel 2B are of equal size, and no differentiated design is made for brightness contribution. This results in insufficient brightness attenuation of some sub-pixels at wide viewing angles, weakening the privacy protection effect of the display panel 2, thereby reducing the privacy protection reliability and user experience of the display panel 2. Therefore, existing display devices have the technical problem of poor privacy protection effect.

[0024] This embodiment addresses the aforementioned technical problems by providing a display panel 2 and a display device 3 to improve those problems.

[0025] Please see Figure 3 This embodiment provides a display panel 2, which can be an Organic Light-Emitting Diode (OLED) display panel. The display panel 2 includes a display area 100 and a non-display area 200. The display area 100 includes a non-privacy area 110 and a privacy area 120. The non-privacy area 110 is provided with a plurality of non-privacy sub-pixels 2A, and the privacy area 120 is provided with a plurality of privacy sub-pixels 2B. The non-display area 200 can be provided with structures such as gate driving circuits and bonding terminals.

[0026] It should be noted that this embodiment does not impose specific restrictions on the arrangement of the non-peeping sub-pixel 2A and the peeping sub-pixel 2B; Figure 3 The arrangement shown (e.g., alternating between privacy sub-pixel 2B and non-privacy sub-pixel 2A) is merely an illustrative example, used only to illustrate the structural features of this embodiment, and does not constitute any limitation on the sub-pixel arrangement.

[0027] Specifically, the light emission angle of the privacy pixel 2B is greater than that of the privacy pixel 2B; the display panel 2 can be configured in a sharing mode, in which both the non-privacy pixel 2A and the privacy pixel 2B emit light; the display panel 2 can be configured in a privacy mode, in which the non-privacy pixel 2A does not emit light, and only the privacy pixel 2B emits light.

[0028] Understandably, because the privacy-protecting sub-pixels have a relatively small light emission angle, the brightness of the light emitted by them decreases rapidly when deviating from the viewing direction, thereby reducing the propagation range of lateral visible light. This helps to reduce the visibility of the display panel 2 in non-viewing directions and achieve a privacy-protecting display effect. On the other hand, the non-privacy-protecting sub-pixels 2A have a larger light emission angle, providing a wide viewing angle display in the sharing mode, thereby ensuring the consistency of display brightness and visual experience.

[0029] Furthermore, Figure 3 The example described uses a non-display area 200 surrounding a display area 100, but this embodiment is not limited to this. The non-display area 200 can be located on one, two, or three sides of the display area 100. Furthermore, when the display panel 2 in this embodiment needs to house under-display sensors (e.g., an under-display camera), the display panel 2 can also have a punch-hole area within the display area 100, which may or may not be displayed. When the display panel 2 in this embodiment uses a full-screen display, the non-display area 200 can be bent or folded to the back of the display panel 2.

[0030] Specifically, the non-display area 200 may include a left border area, a right border area, an upper border area, and a lower border area respectively disposed on the left, right, upper, and lower sides of the display area 100. Gate driving circuits may be disposed in the left and right border areas to input signals, and bonding terminals may be disposed in the lower border area for bonding driving chips.

[0031] Please combine Figure 3 and Figure 4 The display panel 2 includes a substrate 21, a pixel definition layer 22, a light-emitting device layer 23, an encapsulation layer 24, a color filter layer 25, a second light-shielding layer 26, a first light-shielding layer 27, and a cover plate 28, which are stacked together.

[0032] The substrate 21 can be an array substrate 21, which includes a substrate 211 and a driving circuit layer 212 stacked together. The substrate 211 can be a rigid substrate 21 or a flexible substrate 21, used to support the functional layers of the display panel 2, provide overall mechanical stability, and prevent deformation during subsequent deposition or packaging.

[0033] The driving circuit layer 212 is disposed on one side of the substrate 211. The driving circuit layer 212 is used to provide driving electrical signals to the light-emitting device layer 23 to control the switching state and brightness of the light-emitting device, thereby realizing the image display and color adjustment functions of the display panel 2. The driving circuit layer 212 may include multiple thin film transistors 212A for independent driving of each light-emitting unit. The thin film transistors 212A may be etch-block type, back-channel etch type, or classified into bottom gate thin film transistors, top gate thin film transistors, etc. according to the position of the gate and the active layer. This embodiment does not limit this. It is understood that the driving circuit layer 212 is a conventional film layer well known to those skilled in the art, and its specific structure will not be described in detail here.

[0034] Specifically, the driving circuit layer 212 may include a semiconductor layer, a gate insulating layer, a gate, an interlayer insulating layer, a source / drain electrode layer, and a planarization layer stacked on the substrate 211; wherein, the source / drain electrode layer includes a source and a drain electrode spaced apart; the planarization layer is used to provide a smooth surface, eliminate surface unevenness of the substrate 211 or other layers, and ensure that subsequent layers (such as pixel definition layer 22, light-emitting device layer 23, etc.) can be deposited uniformly, thereby improving the display effect and performance of the display panel 2.

[0035] The pixel definition layer 22 is located on the side of the driving circuit layer 212 away from the substrate 211, and is used to define the light-emitting area of ​​each pixel. The pixel definition layer 22 has multiple sub-pixel openings 221. By setting light-emitting functional structures with different light-emitting colors in different sub-pixel openings 221, the display panel 2 can achieve the display effect of full-color images.

[0036] Specifically, the multiple sub-pixel openings 221 include multiple privacy-protecting sub-pixel openings 2211 and multiple non-privacy-protecting sub-pixel openings 2212. The privacy-protecting sub-pixel openings 2211 correspond to the privacy-protecting sub-pixel 2B, and the non-privacy-protecting sub-pixel openings 2212 correspond to the non-privacy-protecting sub-pixel 2A.

[0037] The light-emitting device layer 23 includes an anode layer 231, a light-emitting layer 232, and a cathode layer (not shown in the figure) stacked together. The anode layer 231 is disposed between the pixel definition layer 22 and the driving circuit layer 212. The anode layer 231 includes a plurality of anodes spaced apart. A pixel opening is aligned with a single anode, and at least a portion of the anode surface is exposed in the pixel opening to facilitate subsequent deposition of the light-emitting layer 232 and the formation of electrical contacts. The light-emitting layer 232 is disposed on the anode layer 231 and includes a plurality of light-emitting elements corresponding one-to-one with the plurality of anodes. Each light-emitting part is located within a corresponding pixel opening and is electrically connected to the drain of the thin-film transistor 212A via an anode, thereby enabling independent driving and brightness control of each sub-pixel. The cathode layer is laid entirely on the side of the light-emitting layer 232 away from the anode layer 231. The multiple light-emitting parts include multiple privacy-protected light-emitting parts 2322 and multiple non-privacy-protected light-emitting parts 2321. The privacy-protected light-emitting parts 2322 are disposed within the privacy-protected sub-pixel opening 2211, and the non-privacy-protected light-emitting parts 2321 are disposed within the non-privacy-protected sub-pixel opening 2212.

[0038] Specifically, the light-emitting device layer 23 includes a first light-emitting unit and a second light-emitting unit. The first light-emitting unit includes a non-peeping light-emitting part 2321, and the second light-emitting unit includes a peeping light-emitting part 2322. The driving circuit layer 212 includes a first thin-film transistor 212A1 and a second thin-film transistor 212A2. The non-peeping sub-pixel 2A includes a first light-emitting unit and a first thin-film transistor 212A1 for driving the first light-emitting unit. The peeping sub-pixel 2B includes a second light-emitting unit and a second thin-film transistor 212A2 for driving the second light-emitting unit. The first thin-film transistor 212A1 is electrically connected to the anode of the first light-emitting unit and is used to drive the first light-emitting unit. The second thin-film transistor 212A2 is electrically connected to the anode of the second light-emitting unit and is used to drive the second light-emitting unit. By selectively controlling the driving signals of the first thin-film transistor 212A1 and the second thin-film transistor 212A2, the light-emitting state of the first light-emitting unit and the light-emitting state of the second light-emitting unit can be controlled independently without mutual interference.

[0039] The encapsulation layer 24 is disposed on the side of the light-emitting device layer 23 away from the pixel definition layer 22. The encapsulation layer 24 is used to encapsulate the light-emitting device layer 23 to prevent the anode layer 231, the light-emitting layer 232 and the cathode layer in the light-emitting device layer 23 from coming into contact with water and oxygen in the air, thereby shortening the service life of the display panel 2. The encapsulation layer 24 may include a first inorganic encapsulation layer 241, a first organic encapsulation layer 242 and a second inorganic encapsulation layer 243 stacked on the pixel definition layer 22. The materials of the first inorganic encapsulation layer 241 and the second inorganic encapsulation layer 243 include, but are not limited to, silicon nitride, silicon oxide or silicon oxynitride. The material of the first organic encapsulation layer 242 includes, but is not limited to, polyacrylate.

[0040] A color filter layer 25 is disposed on the side of the encapsulation layer 24 away from the light-emitting device layer 23. The color filter layer 25 includes a color resist block 251 and a black matrix 252. The black matrix 252 has multiple light-transmitting openings 2521. The color resist block 251 is disposed in the light-transmitting openings 2521, and the light-transmitting openings 2521 are corresponding to the privacy pixel openings 2211 and the non-privacy pixel openings 2212. The color of the color resist block 251 is the same as the light emission color of the corresponding light-emitting part, so that the light emitted by the light-emitting part can pass through the corresponding color resist block 251, thereby forming the display light of the expected color.

[0041] Understandably, the color filter layer 25 can absorb and suppress ambient light to a certain extent without the need for a polarizer, thereby reducing interference caused by ambient light reflection. Compared to traditional display structures that rely on polarizers for anti-reflection, the color filter layer 25 can replace the function of a polarizer, thereby reducing transmittance loss caused by the polarizer, improving luminous efficiency, and enhancing the brightness and contrast of the display panel 2.

[0042] The second light-shielding layer 26 is disposed on the side of the color filter layer 25 away from the encapsulation layer 24, and has a plurality of second privacy openings 261, which are provided corresponding to the privacy light-emitting part 2322; the first light-shielding layer 27 is disposed on the side of the second light-shielding layer 26 away from the color filter layer 25, and has a plurality of first privacy openings 271, which are provided corresponding to the second privacy openings 261, thereby performing two-stage narrowing control on the light emission angle of the privacy light-emitting part 2322 in privacy mode, thereby achieving the privacy effect of the display panel 2.

[0043] The cover plate 28 is disposed on the side of the first light-shielding layer 27 away from the second light-shielding layer 26. The cover plate 28 includes, but is not limited to, a passivation film, optical adhesive, and a glass cover plate. The passivation film covers the first light-shielding layer 27 to further improve the surface flatness of the first light-shielding layer 27. The optical adhesive is used to firmly bond the glass cover plate to the passivation film while ensuring high light transmittance. The glass cover plate is used to protect the inner components of the display panel 2, improve mechanical strength, and enhance the durability and scratch resistance of the display panel 2.

[0044] It should be noted that the display panel 2 may further include a touch layer 29, a first planarization layer 201, a second planarization layer 202, and a third planarization layer 203. The touch layer 29 is disposed between the encapsulation layer 24 and the color filter layer 25, and includes multiple touch units and an insulating layer covering the touch units. The touch units are disposed on the light-emitting side of the display panel 2 and are used to realize the acquisition and transmission of touch signals. The insulating layer covers the touch units, thereby providing electrical isolation and protection for the touch units and preventing external environmental factors from interfering with the touch signals. In this embodiment, the touch units are disposed on the light-emitting side of the display panel 2. The film structure of the insulating layer is not specifically limited; the first planarization layer 201 is disposed between the color filter layer 25 and the second light-shielding layer 26, the second planarization layer 202 is disposed between the second light-shielding layer 26 and the first light-shielding layer 27, and the third planarization layer is disposed between the first light-shielding layer 27 and the cover plate 28; wherein, the second planarization layer 202 fills the second privacy opening 261, and the third planarization layer 203 fills the first privacy opening 271, thereby eliminating the surface unevenness of the first light-shielding layer 27 and the second light-shielding layer 26 and improving the flatness of the display panel 2.

[0045] Specifically, the vertical distance between the side of the first light-shielding layer 27 near the substrate 21 and the side of the pixel definition layer 22 near the substrate 21 is greater than the size of the privacy sub-pixel opening and the sum of the distance between the edge of the first privacy opening 271 and the edge of its corresponding privacy sub-pixel opening 2211 in the top view of the display panel 2. As a result, when the display panel 2 is in privacy mode, the ratio of the brightness of the privacy light-emitting part 2322 in the first preset viewing angle range to the brightness in the normal viewing angle is less than 5%. The range of the first preset viewing angle is 45° to 75°. The normal viewing angle refers to the viewing angle when the angle between the viewing direction and the normal direction of the plane where the display panel 2 is located is 0°, that is, the viewing angle when the observer is facing the center of the screen and the line of sight is perpendicular to the screen surface.

[0046] Understandably, the brightness of the display panel 2 reaches its maximum value at a normal viewing angle, which is usually used as a relative benchmark for measuring brightness decay. By making the ratio of the brightness of the privacy light-emitting part 2322 in the first preset viewing angle range to the brightness at a normal viewing angle less than 5%, the privacy effect of the display panel 2 can be improved, ensuring that in privacy mode, a viewer from the side cannot see the display content of the display panel 2, thereby achieving a reliable privacy effect and solving the problem of poor privacy effect of existing display devices.

[0047] It should be noted that during the actual measurement process, due to factors such as the alignment accuracy of the measuring equipment, the installation tolerance of the display panel 2, and ambient light interference, the positioning of the positive angle may have a certain deviation (for example, the actual measured angle may fluctuate within the range of 0°±2°).

[0048] Please continue to combine Figure 3 and Figure 4In one embodiment, at least one privacy light-emitting part 2322 satisfies the following relationship: 1.4≤H / (P+E)≤2.05; where H is the vertical distance between the side of the first light-shielding layer 27 near the substrate 21 and the side of the pixel definition layer 22 near the substrate 21; P is the size of the privacy sub-pixel opening 2211; and E is the distance between the edge of the first privacy opening 271 and the edge of its corresponding privacy sub-pixel opening 2211 in the top view of the display panel 2.

[0049] Furthermore, the vertical distance H between the side of the first light-shielding layer 27 near the substrate 21 and the side of the pixel definition layer 22 near the substrate 21 is greater than or equal to 17.7 μm and less than or equal to 45.9 μm; the size P of the privacy sub-pixel opening 2211 is greater than or equal to 10 μm and less than or equal to 20 μm; and in the top view of the display panel 2, the distance E between the edge of the first privacy opening 271 and the edge of its corresponding privacy sub-pixel opening 2211 is greater than 0 and less than or equal to 3 μm.

[0050] It should be noted that the ratio H / (P+E) refers to the aspect ratio (or height-to-width ratio) of the privacy light-emitting part 2322. Here, H is the vertical distance between the side of the first light-shielding layer 27 closest to the substrate 21 and the side of the pixel definition layer 22 closest to the substrate 21, representing the effective height of the first light-shielding layer 27 relative to the privacy light-emitting part 2322; P is the size of the opening of the privacy light-emitting part 2322; and E is the lateral distance (parallel to the substrate surface) between the edge of the first privacy opening 271 and the edge of the opening of the privacy light-emitting part 2322 from a top-view perspective. The sum of these two (P+E) characterizes the lateral range of light emission from the light-emitting part (i.e., the size of the "wellhead" parallel to the substrate surface). Therefore, the aspect ratio H / (P+E) reflects the ability of the first light-shielding layer 27 to block oblique light: the larger the ratio, the higher the first light-shielding layer 27 is, the narrower the opening, and the more effectively it blocks oblique light.

[0051] When the aspect ratio of the privacy light-emitting part 2322 is small (e.g., less than 1.4), it is equivalent to a shallow "well" and a large "well opening," making it easy for light from a wide viewing angle to leak from above the first light-shielding layer 27, resulting in insufficient privacy protection. When the aspect ratio is large (e.g., greater than 2.05), although the privacy protection effect is better, an excessively large ratio means that the light-shielding layer is too high or the opening is too narrow, which may lead to excessive loss of brightness on the front (due to a decrease in light emission efficiency). Therefore, this embodiment controls the aspect ratio of the privacy light-emitting part 2322 within the range of 1.4 to 2.05, which can achieve a privacy protection effect with brightness attenuation of less than 5% within the first preset viewing angle range while ensuring the brightness of the front display. The technical effect of this range will be verified and explained in detail later through specific simulation comparison data.

[0052] Please combine Figure 3 and Figure 5 In one embodiment, the plurality of non-peeping light-emitting parts 2321 include a first non-peeping light-emitting part 2321, a second non-peeping light-emitting part 2321 and a third non-peeping light-emitting part 2321 with different light-emitting colors; the plurality of peeping light-emitting parts 2322 include a first peeping light-emitting part 2322A, a second peeping light-emitting part 2322B and a third peeping light-emitting part 2322C with different light-emitting colors.

[0053] The light emission color of one of the first, second, and third non-privacy light-emitting parts 2321 is one of red, green, and blue; the light emission color of another of the first, second, and third non-privacy light-emitting parts 2321 is one of red, green, and blue; the light emission color of the remaining one of the first, second, and third non-privacy light-emitting parts 2321 is the remaining one of red, green, and blue. For example, the light emission colors of the first, second, and third non-privacy light-emitting parts 2321 may be red, green, or blue, respectively. Of course, the light emission colors of the first, second, and third non-privacy light-emitting parts 2321 may be other combinations, which will not be elaborated here.

[0054] The light emission color of one of the first privacy light-emitting parts 2322A, the second privacy light-emitting part 2322B, and the third privacy light-emitting part 2322C is one of red, green, and blue; the light emission color of another of the first privacy light-emitting parts 2322A, the second privacy light-emitting part 2322B, and the third privacy light-emitting part 2322C is another of red, green, and blue; the light emission color of the remaining one of the first privacy light-emitting parts 2322A, the second privacy light-emitting part 2322B, and the third privacy light-emitting part 2322C is the remaining one of red, green, and blue. For example, the light emission colors of the first privacy light-emitting parts 2322A, the second privacy light-emitting part 2322B, and the third privacy light-emitting part 2322C are green, red, or blue, respectively. Of course, the light emission colors of the first privacy light-emitting parts 2322A, the second privacy light-emitting part 2322B, and the third privacy light-emitting part 2322C can be other combinations, which will not be elaborated here.

[0055] The plurality of privacy pixel openings 2211 include a first privacy pixel opening 2211A, a second privacy pixel opening 2211B, and a third privacy pixel opening 2211C. The first privacy pixel opening 2211A is provided corresponding to the first privacy light-emitting part 2322A, the second privacy pixel opening 2211B is provided corresponding to the second privacy light-emitting part 2322B, and the third privacy pixel opening 2211C is provided corresponding to the third privacy light-emitting part 2322C.

[0056] The plurality of first privacy openings 271 include a first privacy opening 271A, a second privacy opening 271B, and a third privacy opening 271C. The first privacy opening 271A is provided corresponding to the first privacy light-emitting part 2322A, the second privacy opening 271B is provided corresponding to the second privacy light-emitting part 2322B, and the third privacy opening 271C is provided corresponding to the third privacy light-emitting part 2322C.

[0057] The plurality of second privacy openings 261 include a fourth privacy opening 261A, a fifth privacy opening 261B, and a sixth privacy opening 261C. The fourth privacy opening 261A is provided corresponding to the first privacy light-emitting part 2322A, the fifth privacy opening 261B is provided corresponding to the second privacy light-emitting part 2322B, and the sixth privacy opening 261C is provided corresponding to the third privacy light-emitting part 2322C.

[0058] A first privacy pixel opening 2211A, a first privacy pixel opening 271A, and a fourth privacy pixel opening 261A correspond to each other; a second privacy pixel opening 2211B, a second privacy pixel opening 271B, and a fifth privacy pixel opening 261B correspond to each other; a third privacy pixel opening 2211C, a third privacy pixel opening 271C, and a sixth privacy pixel opening 261C correspond to each other.

[0059] Furthermore, since the human eye perceives different colors of light differently, with green light being the brightest, followed by red light, and blue light being the dimmest, this embodiment sets differentiated aspect ratio ranges for the privacy-protecting light-emitting parts 2322 of different colors in order to maximize the front display efficiency while ensuring the privacy protection effect of the display panel 2.

[0060] Specifically, the brightness of the first privacy light-emitting part 2322A is greater than the brightness of the second privacy light-emitting part 2322B and the third privacy light-emitting part 2322C. The first privacy light-emitting part 2322A can be a green light-emitting part. The first privacy light-emitting part 2322A satisfies the following relationship: 1.7≤H / (P1+E1)≤2.05. Wherein, P1 is the size of the first privacy sub-pixel opening 2211A; E1 is the distance between the edge of the first privacy sub-opening 271A and the edge of the first privacy sub-pixel opening 2211A when viewed from above on the display panel 2.

[0061] The brightness of the second privacy light-emitting part 2322B is less than the brightness of the first privacy light-emitting part 2322A, and the brightness of the second privacy light-emitting part 2322B is greater than the brightness of the third privacy light-emitting part 2322C. The second privacy light-emitting part 2322B can be a red light-emitting part. The second privacy light-emitting part 2322B satisfies the following relationship: 1.6≤H / (P2+E2)≤2.05. Wherein, P2 is the size of the second privacy sub-pixel opening 2211B; E2 is the distance between the edge of the second privacy sub-opening 271B and the edge of the second privacy sub-pixel opening 2211B when viewed from above the display panel 2.

[0062] The brightness of the third privacy light-emitting part 2322C is less than the brightness of the first privacy light-emitting part 2322A, and the brightness of the third privacy light-emitting part 2322C is less than the brightness of the second privacy light-emitting part 2322B. The third privacy light-emitting part 2322C can be a blue light-emitting part. The third privacy light-emitting part 2322C satisfies the following relationship: 1.4≤H / (P3+E3)≤2.05. Wherein, P3 is the size of the third privacy sub-pixel opening 2211C; E2 is the distance between the edge of the third privacy sub-opening 271C and the edge of the third privacy sub-pixel opening 2211C when viewed from above the display panel 2.

[0063] Understandably, by setting different aspect ratio ranges for the privacy light-emitting parts 2322 with different light-emitting colors, the aspect ratio of the first privacy light-emitting part 2322A with the highest brightness is ≥1.7, so that its brightness attenuation within the first preset viewing angle range is most thorough, thereby cutting off the main source of brightness for the side viewer to perceive the displayed content. At the same time, since the second privacy light-emitting part 2322B and the third privacy light-emitting part 2322C have low sensitivity to brightness, even if they still have a small amount of residual brightness at the side viewing angle, it is not enough to be clearly perceived. Therefore, their aspect ratio lower limit can be appropriately relaxed (set to: aspect ratio of the second privacy light-emitting part 2322B ≥1.6 and aspect ratio of the third privacy light-emitting part 2322C ≥1.4 respectively), thereby reducing the front brightness loss caused by excessive obstruction, reducing the difficulty of manufacturing process, and thus achieving a fine balance between privacy effect and display quality.

[0064] Furthermore, the first light-shielding layer 27 satisfies the following relationship: H = h1 + h2 + h3; where h1 is the vertical distance between the side of the first light-shielding layer 27 near the substrate 21 and the side of the second light-shielding layer 26 near the substrate 21; h2 is the vertical distance between the side of the second light-shielding layer 26 near the substrate 21 and the side of the black matrix 252 near the substrate 21; and h3 is the vertical distance between the side of the black matrix 252 near the substrate 21 and the side of the pixel definition layer 22 near the substrate 21.

[0065] A first planarization layer 201 is disposed between the second light-shielding layer 26 and the color filter layer 25. The first planarization layer 201 can be a single-layer structure or a multi-layer structure. Specifically, when the first planarization layer 201 includes one first planarization sublayer, the thickness of the first planarization sublayer is greater than or equal to 5.5 μm and less than or equal to 6.2 μm; when the first planarization layer 201 includes two stacked first planarization sublayers, the thickness of the first planarization layer 201 (i.e., the sum of the thicknesses of the two first planarization sublayers) is greater than or equal to 7 μm and less than or equal to 11.2 μm; when the first planarization layer 201 includes three stacked first planarization sublayers, the thickness of the first planarization layer 201 (i.e., the sum of the thicknesses of the three first planarization sublayers) is greater than or equal to 8.5 μm and less than or equal to 16.2 μm.

[0066] A second planarization layer 202 is disposed between the first light-shielding layer 27 and the second light-shielding layer 26. The second planarization layer 202 can be a single-layer structure or a multi-layer structure. Specifically, when the second planarization layer 202 includes one second planarization sublayer, the thickness of the second planarization layer 202 is greater than or equal to 2.2 μm and less than or equal to 6.2 μm; when the second planarization layer 202 includes two stacked second planarization sublayers, the thickness of the second planarization layer 202 (i.e., the sum of the thicknesses of the two second planarization sublayers) is greater than or equal to 3.7 μm and less than or equal to 11.2 μm; when the second planarization layer 202 includes three stacked second planarization sublayers, the thickness of the second planarization sublayer (i.e., the sum of the thicknesses of the three first planarization sublayers) is greater than or equal to 5.2 μm and less than or equal to 16.2 μm.

[0067] It should be noted that the film structure and thickness of the first planarization layer 201, as well as the film structure and thickness of the second planarization layer 202, can be adaptively selected according to the actual design objectives (such as the required aspect ratio range and light leakage suppression requirements) and process capabilities (such as the maximum thickness of single-layer deposition and the yield of multi-layer deposition). This embodiment does not impose specific restrictions on this.

[0068] It is understood that by controlling the film structure and thickness of the first planarization layer 201 and the film structure and thickness of the second planarization layer 202, this embodiment can adjust the vertical spacing between the side of the first privacy screen near the substrate 21 and the side of the black matrix 252 near the substrate 21, and the vertical spacing between the side of the second privacy screen near the substrate 21 and the side of the black matrix 252 near the substrate 21, thereby meeting the aspect ratio requirements of different privacy levels and achieving a stable and reliable privacy effect.

[0069] Furthermore, the first light-shielding layer 27 includes a first privacy shield, which surrounds the privacy light-emitting part 2322; the second light-shielding layer 26 includes a second privacy shield, which surrounds the privacy light-emitting part 2322; when the display panel 2 is in privacy mode, the privacy light-emitting part 2322 emits light, and the ratio of the brightness of the privacy light-emitting part 2322 in the second preset viewing angle range to the brightness in the normal viewing angle is less than 1%, thereby preventing light leakage from the display panel 2 in the second preset viewing angle range, and further improving the privacy effect and display effect of the display panel 2.

[0070] Specifically, the second preset viewing angle ranges from 60° to 75°; the first privacy screen satisfies the relationship: f1 / h1>0.6; where f1 is the width of the first privacy screen in the top view of the display panel 2; the second privacy screen satisfies the relationship: f2 / h2>0.7; where f2 is the width of the second privacy screen in the top view of the display panel 2.

[0071] It should be noted that f1 / h1 and f2 / h2 refer to the aspect ratio of the first and second privacy screens, respectively. f1 and f2 are the lateral widths (parallel to the substrate surface) measured from a top-down view of the display panel. The aspect ratio reflects the lateral blocking capability of the light-shielding portion against interlayer gaps: a larger ratio indicates a wider light-shielding portion relative to the interlayer height, effectively blocking oblique light leaking from the gaps between the light-shielding layers. When the aspect ratio is too small (e.g., f1 / h1 ≤ 0.6 or f2 / h2 ≤ 0.7), the light leakage brightness at large viewing angles (60° to 75°) can easily exceed 1% of the brightness at a normal viewing angle, thus compromising the integrity of the privacy screen.

[0072] Understandably, by controlling the aspect ratio f1 / h1 of the first privacy screen to be greater than 0.6 and the aspect ratio f2 / h2 of the second privacy screen to be greater than 0.7, the ratio of the brightness of the privacy screen light-emitting part 2322 within the second preset viewing angle range to the brightness within the normal viewing angle is less than 1%. This ensures that even at extremely wide viewing angles, the display panel 2 can present a completely dark state, thereby achieving reliable privacy protection from a viewing angle range of 45° to 75°. Subsequent simulation comparison data will be used to verify and explain the technical effect within this range in detail.

[0073] Specifically, from a top-down view of the display panel 2, the width of the first privacy screen is greater than or equal to 5.5µm and less than or equal to 8.5µm, and the width of the second privacy screen is greater than or equal to 5.5µm and less than or equal to 6.6µm. It is understood that by controlling the widths of the first and second privacy screens, both screens have sufficient lateral dimensions to block oblique light leakage; simultaneously, this avoids the first and second privacy screens from encroaching on the pixel aperture area and causing a decrease in brightness at the normal viewing angle due to excessive width.

[0074] It should be noted that in the above embodiment, the display panel 2 includes a first light-shielding layer 27 and a second light-shielding layer 26, with the first light-shielding layer 27 disposed on the side of the second light-shielding layer 26 away from the substrate 21. Since at least one privacy-protecting light-emitting part 2322 satisfies the relationship: 1.4 ≤ H / (P+E) ≤ 2.05, it can be seen that the main factor affecting the privacy-protecting effect of the privacy-protecting light-emitting part 2322 is the uppermost first light-shielding layer 27, while the second light-shielding layer 26 mainly plays a supporting role in blocking and suppressing interlayer light leakage, and its contribution to the aspect ratio is not direct. Therefore, under the premise of satisfying the above relationship, only one light-shielding layer (i.e., the first light-shielding layer 27) can be provided to achieve the privacy function.

[0075] For example, in another embodiment, the display panel 2 includes a substrate 21, a pixel definition layer 22, a light-emitting device layer 23, an encapsulation layer 24, a color filter layer 25, a first light-shielding layer 27, and a cover plate 28 stacked together; wherein, the side of the color filter layer 25 away from the substrate 21 has only one light-shielding layer (i.e., the first light-shielding layer 27). This structure is simpler than the aforementioned embodiment containing two light-shielding layers, which is beneficial for reducing manufacturing costs and the thickness of the display panel 2.

[0076] It is understandable that, regardless of whether a single-layer or double-layer light-shielding layer is used, as long as the privacy-protecting light-emitting part 2322 meets the aforementioned aspect ratio range (1.4 ≤ H / (P+E) ≤ 2.05), a privacy-protecting effect with brightness attenuation below 5% within the preset viewing angle range can be achieved. The double-layer light-shielding layer design can further suppress interlayer light leakage at large viewing angles (e.g., controlling light leakage from 60° to 75° to below 1%), making it suitable for scenarios with higher privacy-protecting performance requirements; while the single-layer light-shielding layer design has a simpler structure and lower cost, making it suitable for applications with moderate privacy-protecting performance requirements and sensitivity to thickness and cost. Those skilled in the art can choose between the two architectures based on actual product needs, without departing from the scope of protection of this application.

[0077] The technical solutions of the embodiments of this application will now be described in conjunction with specific examples and comparative examples.

[0078] It should be noted that Examples 1 to 8 and Comparative Examples 1 to 11 described below all include the above-mentioned examples. Figures 3 to 5 The display panel in the illustrated embodiment has a first planarization layer between the color filter layer and the second light-shielding layer, the first planarization layer being a single-layer structure; a second planarization layer between the second light-shielding layer and the first light-shielding layer, the second planarization layer comprising two stacked second planarization sub-layers; the first privacy-protecting light-emitting part is a green privacy-protecting light-emitting part, the second privacy-protecting light-emitting part is a red privacy-protecting light-emitting part, and the third privacy-protecting light-emitting part is a blue privacy-protecting light-emitting part; it is understood that the display panel has been described in detail in the above embodiments, and will not be described again here.

[0079] Furthermore, this embodiment uses the relative brightness of the privacy-protecting light-emitting part being less than 5% at a 45° viewing angle and the relative brightness of the light leakage area being less than 1% at 60° and 75° viewing angles as evaluation criteria. Among them, 45° is a typical viewing angle for side observation, and at this angle, a brightness attenuation of less than 5% can ensure the privacy protection effect. 60° and 75° are ultra-large viewing angles, at which point the privacy-protecting pixels themselves emit light very weakly, and a light leakage of less than 1% is required to ensure that the screen is completely dark, avoiding light leakage from compromising the integrity of the privacy protection.

[0080] In Examples 1 to 8, the first privacy-protecting light-emitting part satisfies the following relationship: 1.7≤H / (P1+E1)≤2.05; where 10≤(P1+E1)≤23; the second privacy-protecting light-emitting part satisfies the following relationship: 1.56≤H / (P2+E2)≤2.05; where 10≤(P2+E2)≤23; the third privacy-protecting light-emitting part satisfies the following relationship: 1.4≤H / (P3+E3)≤2.00; the first privacy-protecting part satisfies the following relationship: f1 / h1>0.6; the second privacy-protecting part satisfies the following relationship: f2 / h2>0.7.

[0081] Wherein, 10≤(P3+E3)≤23; H=h1+h2+h3; h1 is the vertical distance between the side of the first light-shielding layer near the substrate and the side of the second light-shielding layer near the substrate, 5.5um≤h1≤16.2um; h2 is the vertical distance between the side of the second light-shielding layer near the substrate and the side of the black matrix near the substrate, 5.5um≤h2≤16.2um; h3 is the vertical distance between the side of the black matrix near the substrate and the side of the pixel definition layer near the substrate, 10um≤h3≤13.5um; 17.7um≤H≤45.9um.

[0082] P1 is the size of the first privacy pixel opening, 10um≤P1≤20um; E1 is the distance between the edge of the first privacy pixel opening and the edge of the first privacy pixel opening from the top view of the display panel, 0<E1≤3um; P2 is the size of the second privacy pixel opening, 10um≤P2≤20um; E2 is the distance between the edge of the second privacy pixel opening and the edge of the second privacy pixel opening from the top view of the display panel, 0<E2≤3um; P3 is the size of the third privacy pixel opening, 10um≤P3≤20um; E3 is the distance between the edge of the third privacy pixel opening and the edge of the third privacy pixel opening from the top view of the display panel, 0<E3≤3um; f1 is the width of the first privacy part from the top view of the display panel, 5.5um≤f1≤8.5um; f2 is the width of the second privacy part from the top view of the display panel, 5.5um≤f2≤6.6um.

[0083] Furthermore, in Comparative Examples 1 to 11, at least one of the above-mentioned relationships is not satisfied, which is used to compare with the embodiments of this application to verify that when the aspect ratio is limited, the privacy protection effect (45° brightness attenuation) will be significantly degraded, thereby verifying the technical effect of the relationship defined in the embodiments of this application.

[0084] Specifically, please refer to Table 1, which shows the brightness test data and color deviation data of the display panels provided in the embodiments of this application (embodiments 1 to 4) and the comparative examples (comparative examples 1 to 6) under different viewing angles.

[0085] In Example 1, H / (P1+E1)=1.70 (length-diameter ratio - G); H / (P2+E2)=1.56 (length-diameter ratio - R); H / (P3+E3)=1.40 (length-diameter ratio - B).

[0086] In Example 2, H / (P1+E1)=2.05 (length-diameter ratio - G); H / (P2+E2)=2.05 (length-diameter ratio - R); H / (P3+E3)=2.00 (length-diameter ratio - B).

[0087] In Example 3, H / (P1+E1)=1.96 (length-diameter ratio - G); H / (P2+E2)=1.99 (length-diameter ratio - R); H / (P3+E3)=1.90 (length-diameter ratio - B).

[0088] In Example 4, H / (P1+E1)=1.81 (length-diameter ratio - G); H / (P2+E2)=1.84 (length-diameter ratio - R); H / (P3+E3)=1.76 (length-diameter ratio - B).

[0089] In Comparative Example 1, H / (P1+E1)=1.63 (length-diameter ratio - G); H / (P2+E2)=1.63 (length-diameter ratio - R); H / (P3+E3)=1.63 (length-diameter ratio - B).

[0090] In Comparative Example 2, H / (P1+E1)=2.12 (length-diameter ratio - G); H / (P2+E2)=2.05 (length-diameter ratio - R); H / (P3+E3)=2.00 (length-diameter ratio - B).

[0091] In Comparative Example 3, H / (P1+E1)=2.05 (length-diameter ratio - G); H / (P2+E2)=2.11 (length-diameter ratio - R); H / (P3+E3)=1.96 (length-diameter ratio - B).

[0092] In Comparative Example 4, H / (P1+E1)=1.70 (length-diameter ratio - G); H / (P2+E2)=1.54 (length-diameter ratio - R); H / (P3+E3)=1.40 (length-diameter ratio - B).

[0093] In Comparative Example 5, H / (P1+E1)=1.70 (length-diameter ratio - G); H / (P2+E2)=1.56 (length-diameter ratio - R); H / (P3+E3)=1.34 (length-diameter ratio - B).

[0094] In Comparative Example 6, H / (P1+E1)=2.05 (length-diameter ratio - G); H / (P2+E2)=2.05 (length-diameter ratio - R); H / (P3+E3)=2.03 (length-diameter ratio - B).

[0095]

[0096] Table 1 It is understandable that, as shown in Table 1, in Example 1, the aspect ratio of the red privacy light-emitting part is 1.56, the aspect ratio of the green privacy light-emitting part is 1.70, and the aspect ratio of the blue privacy light-emitting part is 1.40, all of which are at the lower limit of their respective ranges; in privacy mode, the relative brightness at a 45° viewing angle is 5.0%, which meets the requirement of not exceeding 5%; the light leakage brightness at 60° and 75° is 0.2% and 0.007%, respectively, which are far below 1%.

[0097] In Example 2, the aspect ratio of the red privacy light-emitting part is 2.05, the aspect ratio of the green privacy light-emitting part is 2.05, and the aspect ratio of the blue privacy light-emitting part is 2.00, all at the upper limit of their respective ranges. In privacy mode, the relative brightness at 45° is 0.81%, meeting the requirement of not exceeding 5%. The light leakage at 60° and 75° is 0.61% and 0.12% respectively, both below 1%. In sharing mode, the viewing angle deviation at 60° is 4.5 × 10⁻⁶. - ², controlled at 5.0×10 - ² is within an acceptable range.

[0098] In Example 3, the aspect ratio of the red privacy light-emitting part is 1.99, the aspect ratio of the green privacy light-emitting part is 1.96, and the aspect ratio of the blue privacy light-emitting part is 1.90, all located in the middle region of their respective ranges; in privacy mode, the relative brightness at 45° is 1.29%, meeting the requirement of less than 5%; the light leakage at 60° and 75° is 0.12%, both less than 1%; in shared mode, the color shift at 60° is 2.8 × 10⁻⁶. - ², controlled at 5.0×10 - ² is within an acceptable range.

[0099] In Example 4, the aspect ratio of the red privacy light-emitting part is 1.84, the aspect ratio of the green privacy light-emitting part is 1.81, and the aspect ratio of the blue privacy light-emitting part is 1.76. In privacy mode, the relative brightness at 45° is 2.61%, meeting the requirement of less than 5%. Light leakage at 60° and 75° is as low as 0.02% and 0.00%, respectively, both below 1%. In shared mode, the color shift at 60° is 3.2 × 10⁻⁶. - ², controlled at 5.0×10 - ² is within an acceptable range.

[0100] In Comparative Example 1, the aspect ratio of the green privacy light-emitting part was 1.63 (less than the lower limit of 1.70 for the aspect ratio of green privacy light-emitting parts), the aspect ratio of the red privacy light-emitting part was 1.63, and the aspect ratio of the blue privacy light-emitting part was 1.63. In privacy mode, the brightness attenuation was as follows: 0° (100%), 15° (76.8%), 30° (32.4%), 45° (5.41%), 60° (0.155%), and 75° (0.001%). Among them, the brightness at 45° was 5.41%, which exceeded 5%, and the privacy effect was unqualified.

[0101] In Comparative Example 2, the aspect ratio of the green privacy light-emitting part is 2.12 (greater than the upper limit of 2.05 for green privacy light-emitting parts), the aspect ratio of the red privacy light-emitting part is 2.05, and the aspect ratio of the blue privacy light-emitting part is 2.00. In privacy mode, the brightness attenuation at various viewing angles is: 0° (100%), 15° (68.4%), 30° (18.6%), 45° (0.57%), 60° (0.10%), and 75° (0.02%). Color shift in shared mode is: 15° (1.1%), 30° (2.0%), 45° (3.9%), and 60° (8.5%). The brightness at 45° is only 0.57%, meeting the privacy requirements, but the color shift at 60° is as high as 8.5 × 10⁻⁶. - ², far exceeding 5.0×10 - ², which causes severe color shift during normal display.

[0102] In Comparative Example 3, the aspect ratio of the red privacy light-emitting part is 2.11 (greater than the upper limit of 2.05 for red privacy light-emitting parts), the aspect ratio of the green privacy light-emitting part is 2.05, and the aspect ratio of the blue privacy light-emitting part is 1.96. In privacy mode, the brightness attenuation at various viewing angles is: 0° (100%), 15° (68.4%), 30° (19.3%), 45° (0.87%), 60° (0.68%), and 75° (0.12%). The color shift in shared mode is: 15° (1.1%), 30° (1.9%), 45° (3.7%), and 60° (8.0%). The brightness at 45° is 0.87%, meeting the privacy requirements, but the color shift at 60° is 8.0 × 10⁻⁶. - ², far exceeding 5.0×10- ², which causes severe color shift during normal display.

[0103] In Comparative Example 4, the aspect ratio of the red privacy light-emitting part was 1.54 (less than the lower limit of 1.56 for red privacy light-emitting parts), the aspect ratio of the green privacy light-emitting part was 1.70, and the aspect ratio of the blue privacy light-emitting part was 1.40. In privacy mode, the brightness attenuation at various viewing angles was as follows: 0° (100%), 15° (76.5%), 30° (31.7%), 45° (5.09%), 60° (0.218%), and 75° (0.009%). The brightness at 45° was 5.09%, exceeding 5%, thus failing the privacy protection standard.

[0104] In Comparative Example 5, the aspect ratio of the blue privacy light-emitting part was 1.34 (less than the lower limit of 1.40 for the aspect ratio of blue privacy light-emitting parts), the aspect ratio of the red privacy light-emitting part was 1.56, and the aspect ratio of the green privacy light-emitting part was 1.70. The brightness attenuation in privacy mode was as follows: 0° (100%), 15° (76.6%), 30° (31.8%), 45° (5.03%), 60° (0.222%), and 75° (0.010%). Among them, the brightness at 45° was 5.03%, which exceeded 5%, and the privacy protection was not up to standard.

[0105] In Comparative Example 6, the aspect ratio of the blue privacy light-emitting part is 2.03 (greater than the upper limit of 2.00 for the aspect ratio of blue privacy light-emitting parts), the aspect ratio of the red privacy light-emitting part is 2.05, and the aspect ratio of the green privacy light-emitting part is 2.05. Brightness attenuation in privacy mode is: 0° (100%), 15° (68.4%), 30° (19.2%), 45° (0.82%), 60° (0.61%), 75° (0.12%). Color shift in shared mode is: 15° (1.1%), 30° (1.9%), 45° (3.3%), 60° (5.5%). The brightness at 45° is 0.82%, meeting the privacy requirements, but the color shift at 60° is 5.5 × 10⁻⁶. - ², exceeding 5.0 × 10 - ², which causes severe color shift during normal display.

[0106] As can be seen from the above, when the aspect ratio of the red privacy light-emitting part is between 1.56 and 2.05, the aspect ratio of the green privacy light-emitting part is between 1.70 and 2.05, and the aspect ratio of the blue privacy light-emitting part is between 1.40 and 2.00 (Examples 1-4), in privacy mode, the relative brightness at a 45° viewing angle is no higher than 5%, and the light leakage brightness at 60° and 75° is less than 1%. In sharing mode, the aspect ratio at a 60° viewing angle is less than 5.0 × 10⁻⁶. - ², achieving a good balance between privacy protection and display quality.

[0107] Based on Comparative Examples 1, 4, and 5, the following results are observed: In Comparative Example 1, the aspect ratio of the green privacy light-emitting part decreased to 1.63 (below 1.70), and the 45° brightness increased to 5.41%; in Comparative Example 4, the aspect ratio of the red privacy light-emitting part decreased to 1.54 (below 1.56), and the 45° brightness was 5.09%; in Comparative Example 5, the aspect ratio of the blue privacy light-emitting part decreased to 1.34 (below 1.40), and the 45° brightness was 5.03%. The 45° brightness of all the above comparative examples exceeded 5%, indicating that the privacy protection effect was unqualified. This demonstrates that any color with an aspect ratio below its lower limit will compromise the privacy protection function.

[0108] Combining Comparative Examples 2, 3, and 6, it can be seen that in Comparative Example 2, the aspect ratio of the green privacy light-emitting part increased to 2.12 (higher than 2.05). Although the 45° brightness decreased to 0.57%, the color shift at 60° in shared mode reached 8.5 × 10⁻⁶. - ²; In Comparative Example 3, the aspect ratio of the red privacy light-emitting part increased to 2.11 (higher than 2.05), and the color shift at 60° was 8.0 × 10. - ²; In Comparative Example 6, the aspect ratio of the blue privacy light-emitting part increased to 2.03 (higher than 2.00), and the color shift at 60° was 5.5 × 10⁻⁶. - ². The color shift at 60° in the above comparative examples all exceeded 5.0 × 10. - ², color shift is unacceptable during normal display. This indicates that while an aspect ratio of any color exceeding its upper limit can improve privacy protection, it comes at the cost of sacrificing display quality (color shift at high viewing angles).

[0109] It is understood that the aspect ratio ranges (1.56-2.05, 1.70-2.05, 1.40-2.00) of the red, green, and blue privacy light-emitting parts defined in this embodiment are critical ranges verified by simulation. Within these ranges, reliable privacy performance and good display quality can be obtained simultaneously; however, exceeding these ranges will inevitably lead to privacy failure or severe color deviation.

[0110] Furthermore, please refer to Table 2 for the brightness test data of the display panels provided in the embodiments of this application (embodiments 5 to 8) and the comparative examples (comparative examples 7 to 11) at different viewing angles.

[0111] In Example 5, f1 / h1 = 1.21 (the aspect ratio of the first privacy screen); f2 / h2 = 0.75 (the aspect ratio of the second privacy screen).

[0112] In Example 6, f1 / h1 = 1.21 (the aspect ratio of the first privacy screen); f2 / h2 = 1.00 (the aspect ratio of the second privacy screen).

[0113] In Example 7, f1 / h1 = 1.04 (the aspect ratio of the first privacy screen); f2 / h2 = 0.71 (the aspect ratio of the second privacy screen).

[0114] In Example 8, f1 / h1 = 0.75 (the aspect ratio of the first privacy screen); f2 / h2 = 3.00 (the aspect ratio of the second privacy screen).

[0115] In Comparative Example 7, f1 / h1 = 0.6 (the aspect ratio of the first privacy screen); f2 / h2 = 0.70 (the aspect ratio of the second privacy screen).

[0116] In Comparative Example 8, f1 / h1 = 1.00 (the aspect ratio of the first privacy screen); f2 / h2 = 0.70 (the aspect ratio of the second privacy screen).

[0117] In Comparative Example 9, f1 / h1 = 1.00 (the aspect ratio of the first privacy screen); f2 / h2 = 0.57 (the aspect ratio of the second privacy screen).

[0118] In Comparative Example 10, f1 / h1 = 0.60 (the aspect ratio of the first privacy screen); f2 / h2 = 1.36 (the aspect ratio of the second privacy screen).

[0119] In Comparative Example 11, f1 / h1 = 0.57 (the aspect ratio of the first privacy screen); f2 / h2 = 1.36 (the aspect ratio of the second privacy screen).

[0120]

[0121] Table 2 In Example 5, the aspect ratio f1 / h1 of the first privacy screen is 1.21 (>0.6), and the aspect ratio f2 / h2 of the second privacy screen is 0.75 (>0.7). In privacy mode, the relative brightness of each viewing angle is: 0° (100%), 15° (70.7%), 30° (22.5%), 45° (1.29%), 60° (0.12%), and 75° (0.12%). Among them, the brightness at 45° is 1.29%, which meets the requirement of not exceeding 5%; the light leakage at 60° and 75° is 0.12%, which meets the requirement of not exceeding 1.00%, and the light leakage is effectively suppressed.

[0122] In Example 6, the aspect ratio f1 / h1 of the first privacy screen is 1.21 (>0.6), and the aspect ratio f2 / h2 of the second privacy screen is 1.00 (>0.7). In privacy mode, the relative brightness of each viewing angle is: 0° (100%), 15° (71.6%), 30° (23.2%), 45° (1.37%), 60° (0.01%), and 75° (0.00%). Among them, the brightness at 45° is 1.37%, which meets the requirement of not exceeding 5%; the light leakage at 60° is 0.01%, and the light leakage at 75° is 0.00%, both meeting the requirement of not exceeding 1%, and light leakage is effectively suppressed.

[0123] In Example 7, the aspect ratio f1 / h1 of the first privacy screen is 1.04 (>0.6), and the aspect ratio f2 / h2 of the second privacy screen is 0.71 (>0.7). In privacy mode, the relative brightness of each viewing angle is: 0° (100%), 15° (68.4%), 30° (19.3%), 45° (0.74%), 60° (0.20%), and 75° (0.04%). Among them, the brightness at 45° is 0.74%, which meets the requirement of not exceeding 5%; the light leakage at 60° is 0.20%, and the light leakage at 75° is 0.04%, both of which meet the requirement of not exceeding 1%, and the light leakage is effectively suppressed.

[0124] In Example 8, the aspect ratio f1 / h1 of the first privacy screen is 0.75 (>0.6), and the aspect ratio f2 / h2 of the second privacy screen is 3.00 (>0.7). In privacy mode, the relative brightness of each viewing angle is: 0° (100%), 15° (72.9%), 30° (26.6%), 45° (2.61%), 60° (0.097%), and 75° (0.16%). Among them, the brightness at 45° is 2.61%, which meets the requirement of not more than 5%; the light leakage at 60° is 0.097%, and the light leakage at 75° is 0.16%, both of which meet the requirement of not more than 1%, and the light leakage is effectively suppressed.

[0125] In Comparative Example 7, the aspect ratio f1 / h1 of the first privacy screen is 0.60 (not meeting the requirement of >0.6), and the aspect ratio f2 / h2 of the second privacy screen is 0.70 (not meeting the requirement of >0.7). In privacy mode, the relative brightness of each viewing angle is: 0° (100%), 15° (72.3%), 30° (26.2%), 45° (2.55%), 60° (1.00%), and 75° (1.00%). Among them, the brightness of 45° is 2.55%, which meets the privacy requirements, but the light leakage of 60° and 75° is 1.00%, which has reached the acceptable upper limit. This indicates that when the aspect ratio is equal to the threshold, the light leakage is already in a critical state and must be strictly greater than the threshold.

[0126] In Comparative Example 8, the aspect ratio f1 / h1 of the first privacy screen is 1.00 (>0.6), and the aspect ratio f2 / h2 of the second privacy screen is 0.70 (not meeting the requirement of >0.7). In privacy mode, the relative brightness of each viewing angle is: 0° (100%), 15° (72.3%), 30° (26.2%), 45° (2.55%), 60° (0.40%), and 75° (1.00%). Among them, the brightness at 45° is 2.55%, which meets the privacy requirements, but the light leakage at 75° is 1.00%, reaching the critical value. Compared with Example 6 (f2 / h2=1.00, 75° light leakage 0.00%), it can be seen that f2 / h2 must be greater than 0.7 to suppress the 75° light leakage to below 1%.

[0127] In Comparative Example 9, the aspect ratio f1 / h1 of the first privacy screen is 1.00 (>0.6), and the aspect ratio f2 / h2 of the second privacy screen is 0.57 (not meeting the requirement of >0.7). In privacy mode, the relative brightness at each viewing angle is: 0° (100%), 15° (69.3%), 30° (21.8%), 45° (1.57%), 60° (2.41%), and 75° (2.44%). The brightness at 45° is 1.57%, meeting the privacy requirements, but the light leakage at 60° and 75° is as high as 2.41% and 2.44%, respectively, far exceeding the requirement of 1%. This indicates that f2 / h2 below 0.7 will lead to severely excessive light leakage at large viewing angles.

[0128] In Comparative Example 10, the aspect ratio f1 / h1 of the first privacy screen is 0.60 (not meeting the requirement of >0.6), and the aspect ratio f2 / h2 of the second privacy screen is 1.36 (>0.7). In privacy mode, the relative brightness of each viewing angle is: 0° (100%), 15° (68.5%), 30° (19.4%), 45° (1.11%), 60° (1.00%), and 75° (0.13%). Among them, the brightness of 45° is 1.11%, which meets the privacy requirements, but the light leakage of 60° is 1.00%, which reaches the critical value. Compared with Example 5 (f1 / h1=1.21, 60° light leakage 0.12%), it can be seen that f1 / h1 must be greater than 0.6 to reduce the 60° light leakage to below 1%.

[0129] In Comparative Example 11, the aspect ratio f1 / h1 of the first privacy screen is 0.57 (not meeting the requirement of >0.6), and the aspect ratio f2 / h2 of the second privacy screen is 1.36 (>0.7). In privacy mode, the relative brightness of each viewing angle is: 0° (100%), 15° (68.5%), 30° (19.4%), 45° (1.11%), 60° (1.24%), and 75° (0.17%). The brightness at 45° is 1.11%, which meets the privacy requirement, but the light leakage at 60° is 1.24%, exceeding 1%. This further verifies that an f1 / h1 ratio below 0.6 will result in unacceptable light leakage.

[0130] Understandably, through system simulation and comparative analysis of the aspect ratios of the first and second privacy screens, it can be seen that when f1 / h1>0.6 and f2 / h2>0.7 (as in Examples 5 to 8), the light leakage brightness at 60° and 75° viewing angles in privacy mode can be stably controlled below 1%, ensuring the integrity of privacy protection at ultra-large viewing angles. However, when f1 / h1≤0.6 or f2 / h2≤0.7 (as in Comparative Examples 7 to 11), the light leakage at 60° or 75° reaches or even exceeds the critical value of 1%, with some comparative examples showing light leakage as high as 2% or more, causing side observers to perceive screen light leakage, and significantly degrading the privacy protection effect.

[0131] Please combine Figure 1 and Figure 6 This embodiment also provides a display device 3, which includes the display panel 2 in any of the above embodiments; wherein, the display device 3 may further include a housing 31, which is integrated with the display panel 2 to provide support, fixation and protection for the display panel 2.

[0132] It is understood that the display panel 2 has been described in detail in the above embodiments and will not be described again here; in particular, since the display device 3 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated here.

[0133] In specific applications, the display device 3 can be at least one of the following devices with display functions: smartphone, tablet, mobile phone, video phone, e-book reader, desktop computer, laptop, netbook, workstation, server, personal digital assistant, portable media player, MP3 player, mobile medical device, camera, game console, digital camera, car navigation system, electronic billboard, ATM or wearable device.

[0134] The above provides a detailed description of a display panel and display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display panel, characterized in that, include: substrate; A pixel definition layer is disposed on one side of the substrate and has multiple privacy-protecting sub-pixel openings and multiple non-privacy-protecting sub-pixel openings; A light-emitting layer is disposed on one side of the substrate and includes a plurality of privacy-protected light-emitting portions and a plurality of non-privacy-protected light-emitting portions. The privacy-protected light-emitting portions are disposed within the privacy-protected sub-pixel openings, and the non-privacy-protected light-emitting portions are disposed within the non-privacy-protected sub-pixel openings. as well as A first light-shielding layer is disposed on the side of the light-emitting layer and the pixel definition layer away from the substrate, and is provided with a plurality of first privacy openings, the first privacy openings being provided corresponding to the privacy light-emitting part; Wherein, at least one of the privacy-protecting light-emitting parts satisfies the relationship: 1.4≤H / (P+E)≤2.05; Wherein, H is the vertical distance between the side of the first light-shielding layer near the substrate and the side of the pixel definition layer near the substrate; P is the size of the privacy sub-pixel opening; and E is the distance between the edge of the first privacy opening and the edge of its corresponding privacy sub-pixel opening when viewed from above on the display panel.

2. The display panel according to claim 1, characterized in that, The plurality of privacy-protecting light-emitting parts include a first privacy-protecting light-emitting part, a second privacy-protecting light-emitting part, and a third privacy-protecting light-emitting part with different light-emitting colors; The plurality of privacy-protecting sub-pixel openings include a first privacy-protecting sub-pixel opening, a second privacy-protecting sub-pixel opening, and a third privacy-protecting sub-pixel opening. The first privacy-protecting sub-pixel opening is disposed corresponding to the first privacy-protecting light-emitting part, the second privacy-protecting sub-pixel opening is disposed corresponding to the second privacy-protecting light-emitting part, and the third privacy-protecting sub-pixel opening is disposed corresponding to the third privacy-protecting light-emitting part. The plurality of first privacy openings include a first privacy opening, a second privacy opening, and a third privacy opening. The first privacy opening is provided corresponding to the first privacy light-emitting part, the second privacy opening is provided corresponding to the second privacy light-emitting part, and the third privacy opening is provided corresponding to the third privacy light-emitting part.

3. The display panel according to claim 2, characterized in that, The brightness of the first privacy light-emitting part is greater than the brightness of the second privacy light-emitting part and the brightness of the third privacy light-emitting part. The first privacy light-emitting part satisfies the relationship: 1.70≤H / (P1+E1)≤2.05; Wherein, P1 is the size of the first privacy pixel opening; E1 is the distance between the edge of the first privacy opening and the edge of the first privacy pixel opening when viewed from above on the display panel.

4. The display panel according to claim 2, characterized in that, The brightness of the second privacy light-emitting part is less than that of the first privacy light-emitting part, the brightness of the second privacy light-emitting part is greater than that of the third privacy light-emitting part, and the second privacy light-emitting part satisfies the relationship: 1.56≤H / (P2+E2)≤2.05; Wherein, P2 is the size of the second privacy pixel opening; E2 is the distance between the edge of the second privacy opening and the edge of the second privacy pixel opening when viewed from above on the display panel.

5. The display panel according to claim 2, characterized in that, The brightness of the third privacy light-emitting part is less than that of the first privacy light-emitting part, and the brightness of the third privacy light-emitting part is less than that of the second privacy light-emitting part. The third privacy light-emitting part satisfies the following relationship: 1.40≤H / (P3+E3)≤2.00; Wherein, P3 is the size of the third privacy pixel opening; E2 is the distance between the edge of the third privacy pixel opening and the edge of the third privacy pixel opening when viewed from above on the display panel.

6. The display panel according to claim 2, characterized in that, The first privacy light-emitting part is a green privacy light-emitting part, the second privacy light-emitting part is a red privacy light-emitting part, and the third privacy light-emitting part is a blue privacy light-emitting part.

7. The display panel according to any one of claims 1 to 6, characterized in that, The display panel also includes: A color filter layer is disposed between the pixel definition layer and the first light-shielding layer. The filter layer includes multiple color blocks and a black matrix. The black matrix has multiple light-transmitting openings, which are disposed corresponding to the non-peeping light-emitting part. The color blocks are disposed inside the light-transmitting openings. The second light-shielding layer is disposed between the first light-shielding layer and the filter layer, and has a plurality of second privacy openings, the second privacy openings being disposed corresponding to the privacy light-emitting part; The ratio of the brightness of the privacy light-emitting part within the preset viewing angle range to the brightness within the normal viewing angle is less than 1%.

8. The display panel according to claim 7, characterized in that, The first light-shielding layer includes a first privacy shield, which is disposed around the privacy light-emitting part, and the first privacy shield satisfies the relationship: f1 / h1>0.6; Where f1 is the width of the first privacy screen in the top view of the display panel; h1 is the vertical distance between the side of the first privacy screen near the substrate and the side of the black matrix near the substrate.

9. The display panel according to claim 8, characterized in that, The second light-shielding layer includes a second privacy shield, which is disposed around the privacy light-emitting part, and the second privacy shield satisfies the relationship: f2 / h2>0.7; Where f2 is the width of the second privacy screen in the top view of the display panel; h2 is the vertical distance between the side of the second privacy screen near the substrate and the side of the black matrix near the substrate.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 9.

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