Display panel, preparation method and control method thereof, display screen and display equipment

Abstract

The embodiment of the invention relates to a display panel, a preparation method thereof, a control method, a display screen and display equipment. The display panel includes: a substrate; the multiple sub-pixels are located on one side of the substrate, and each sub-pixel comprises a light-emitting layer; the plurality of sub-pixels comprise a plurality of first sub-pixels and a plurality of second sub-pixels; the light shielding layer is located on the side, away from the substrate, of the multiple sub-pixels, and the light shielding layer is used for shielding the part, with the included angle larger than the threshold angle, of the emergent light beam of the second sub-pixel and the positive view angle of the display panel; wherein the first light-emitting area of the first sub-pixel is larger than the second light-emitting area of the second sub-pixel, and the first light-emitting area is the area of the light-emitting layer of the first sub-pixel. The second light emitting area is the area of a region, which is not overlapped with the light shielding layer, of the light emitting layer of the second sub-pixel in the thickness direction of the display panel.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of display, and in particular, to a display panel, a preparation method, a control method, a display screen and a display device. BACKGROUND

[0002] With the development of technology, the functions of mobile devices are increasingly rich, and users increasingly rely on mobile display devices in daily life. When the user is in a crowded place such as a subway, bus, elevator or waiting area, there is a lack of personal privacy and information security protection when using a mobile phone, and some people around may spy on the information displayed by the display device, exposing privacy. Therefore, it is urgent to provide a display panel capable of anti-peeping protection, a preparation method, a control method, a display screen and a display device. SUMMARY

[0003] Therefore, it is necessary to provide a display panel, a preparation method, a control method, a display screen and a display device in view of the above technical problems.

[0004] In a first aspect, the present application provides a display panel, comprising:

[0005] a substrate;

[0006] a plurality of sub-pixels located on one side of the substrate, the sub-pixels comprising a light-emitting layer; the plurality of sub-pixels comprising a plurality of first sub-pixels and a plurality of second sub-pixels;

[0007] a light-shielding layer located on a side of the plurality of sub-pixels away from the substrate, the light-shielding layer being configured to shield a portion of an outgoing light beam of the second sub-pixels having an included angle greater than a threshold angle with a normal view angle of the display panel;

[0008] wherein a first light-emitting area of the first sub-pixel is greater than a second light-emitting area of the second sub-pixel, the first light-emitting area being an area of the light-emitting layer of the first sub-pixel, and the second light-emitting area being an area of a region of the light-emitting layer of the second sub-pixel that does not overlap with the light-shielding layer in a thickness direction of the display panel.

[0009] In a second aspect, the present application provides a preparation method of a display panel, comprising:

[0010] providing a substrate;

[0011] forming a plurality of sub-pixels on one side of the substrate; the plurality of sub-pixels comprising a plurality of first sub-pixels and a plurality of second sub-pixels;

[0012] An opaque layer is formed on a side of the sub-pixel away from the substrate, and the opaque layer is used to shield a portion of an outgoing light beam of the second sub-pixel, the angle between the portion and a normal viewing angle of the display panel being greater than a threshold angle;

[0013] The first light-emitting area of the first sub-pixel is greater than the second light-emitting area of the second sub-pixel, the first light-emitting area is an area of a light-emitting layer of the first sub-pixel, and the second light-emitting area is an area of a region of a light-emitting layer of the second sub-pixel that does not overlap with the opaque layer in a thickness direction of the display panel.

[0014] In a third aspect, the present application provides a display panel control method, used for controlling the display panel as described above, and the display panel control method comprises:

[0015] obtaining a current display mode;

[0016] in a case where the display mode is a shared mode, controlling the first sub-pixels and the second sub-pixels to emit light according to a to-be-displayed picture;

[0017] in a case where the display mode is a privacy mode, controlling the second sub-pixels to emit light according to a to-be-displayed picture.

[0018] In a fourth aspect, the present application provides a display screen, comprising:

[0019] the display panel as described above, or a display panel prepared by using the display panel preparation method as described above, or a display panel controlled by using the display panel control method as described above;

[0020] a cover plate located on a light-emitting side of the display panel and covering the display panel.

[0021] In a fifth aspect, the present application provides a display device, comprising the display screen as described above.

[0022] The display panel, the manufacturing method, the control method, the display screen and the display device can make the target user normally see the light beams emitted by the second sub-pixel and make other users unable to see or only a small amount of see the light beams emitted by the second sub-pixel from the angle greater than the threshold angle relative to the normal angle of the display panel. Based on this, when the display panel displays in the privacy mode through the second sub-pixel, other users cannot pry the picture under the premise that the target user normally watches the picture displayed by the display panel, and has a better privacy effect. Moreover, by setting the first light-emitting area of the first sub-pixel greater than the second light-emitting area of the second sub-pixel, the first light-emitting area can be used to ensure that the first sub-pixel contributes sufficient luminous brightness when the display panel displays in the sharing mode through the first sub-pixel and the second sub-pixel, thereby improving the display brightness and clarity of the display panel as a whole, and achieving a balance between the privacy effect and the display effect in the sharing mode. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 is an exploded schematic view of a display device of an embodiment;

[0025] Fig. 2(a) is a top view of a display panel of an embodiment;

[0026] Fig. 2(b) is a schematic view of a threshold angle of an embodiment;

[0027] Figure 3 is a cross-sectional view of a first sub-pixel of a display panel of an embodiment;

[0028] Figure 4 is a cross-sectional view of a second sub-pixel of a display panel of an embodiment;

[0029] Figure 5 is a schematic view of a PenTile arrangement of an embodiment;

[0030] Figure 6 is a top view of a display panel of an embodiment;

[0031] Figure 7 This is a third partial top view of a display panel according to one embodiment;

[0032] Figure 8 Fourth partial top view of a display panel according to one embodiment;

[0033] Figure 9 Fifth partial top view of a display panel according to an embodiment;

[0034] Figure 10 This is a schematic diagram illustrating an example of a staggered subpixel arrangement.

[0035] Figure 11 To adopt Figure 10 The timing of data signals for the sub-pixel arrangement;

[0036] Figure 12 This is a data signal timing diagram using a full RGB arrangement, as shown in one embodiment.

[0037] Figure 13 A flowchart illustrating a method for manufacturing a display panel according to one embodiment;

[0038] Figure 14 A sub-flowchart illustrating the formation of multiple sub-pixels on one side of a substrate, as one embodiment;

[0039] Figure 15 A flowchart illustrating a control method for a display panel according to one embodiment;

[0040] Figure 16 This is a schematic diagram of a display panel in shared mode according to one embodiment.

[0041] Figure 17 This is a schematic diagram of a display panel in privacy mode according to one embodiment.

[0042] Figure 18 This is an internal structural diagram of a display device according to one embodiment.

[0043] Component designation explanation:

[0044] Sub-pixel: 100; First light-emitting row: 101; First light-emitting column: 102; First light-emitting unit: 110; First sub-pixel: 111; Second light-emitting row: 103; Second light-emitting column: 104; Second light-emitting unit: 120; Second sub-pixel: 121; Light-emitting layer: 131; Anode layer: 132; Cathode layer: 133; Pixel definition layer: 134; Light-shielding layer: 200; First light-shielding sub-layer: 210; Second light-shielding sub-layer: 220; Isolation structure: 300; Metal isolation pillar: 310; Shielding layer: 320; Encapsulation part: 400; First encapsulation layer: 410; Second encapsulation layer: 420; Third encapsulation layer: 430. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0046] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, the first sub-pixel 111 may be referred to as the second sub-pixel 121, and similarly, the second sub-pixel 121 may be referred to as the first sub-pixel 111.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. "Multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. "Several" means at least one, such as one, two, etc., unless otherwise explicitly specified.

[0048] This application provides a display panel that can be applied to display devices. Display devices can be, but are not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, smart in-vehicle devices, etc. Portable wearable devices can include smartwatches, smart bracelets, head-mounted devices, etc.

[0049] This application provides a display screen applied to a display device. The display device can be, but is not limited to, various personal computers, laptops, smart display devices, tablets, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, smart in-vehicle devices, etc. Portable wearable devices can include smartwatches, smart bracelets, head-mounted devices, etc.

[0050] Figure 1 This is an exploded view of a display device according to an embodiment, with reference to... Figure 1 The display device includes a display screen 10, a middle frame 20, and a back cover 30 arranged sequentially along the thickness direction.

[0051] The middle frame 20 includes a frame body 21 and a bezel 22 surrounding the frame body 21. The bezel 22 can be a conductive bezel 22. Of course, in other embodiments, the display device can not have the frame body 21. The display screen 10, the frame body 21, and the back cover 30 are sequentially stacked, and a receiving space is formed between the display screen 10 and the frame body 21, and between the frame body 21 and the back cover 30 to accommodate the main board 24, the camera module, the receiver module, the battery, various sensors, and the like. One side of the bezel 22 surrounds the edge of the display screen 10, and the other side of the bezel 22 surrounds the edge of the back cover 30 to form a complete appearance structure of the display device. In this embodiment, the bezel 22 and the frame body 21 are an integral structure, and the bezel 22 and the back cover 30 can be a split structure. It should be noted that the above is an exemplary working environment of the display screen, but the display screen of the present application is not limited to the above working environment.

[0052] The bezel 22 includes a top edge, a bottom edge, and a first side edge and a second side edge connected to the top edge and the bottom edge. The top edge is the edge away from the ground when the user holds the display device vertically. The bottom edge is the edge towards the ground when the user holds the display device vertically. The first side edge is the left side edge when the user holds the display device vertically. The second side edge is the right side edge when the user holds the display device vertically. Of course, the first side edge can also be the right side edge when the user holds the display device. The second side edge is the left side edge when the user holds the display device.

[0053] In the related art, users mainly prevent information from being snooped by others by attaching an anti-peeping film to the display device to achieve the purpose of protecting personal privacy and business secrets. However, the anti-peeping film is based on the louver polarizing principle, which blocks part of the light, thereby reducing the transmittance of the light beam emitted by the display device to only about 70%, thereby causing various problems such as poor display clarity, obvious graininess, blurred font, and the like, greatly affecting the user's viewing experience. Moreover, the thickness of the anti-peeping film is about 0.5 mm, and a thicker anti-peeping film can cause the fingerprint of the display device to fail, thereby failing to provide the user with unlocking or payment functions, affecting the user's experience. In addition, since the commonly used display devices such as mobile phones on the market use curved display screens, the anti-peeping film is not easy to fit in the curved area at the edge of the display screen, thereby possibly causing light leakage problems or the viewing angle at the edge being different from the middle. Therefore, even if the anti-peeping film is used, it cannot fully meet the user's anti-peeping needs.

[0054] An embodiment of the present application provides a display panel, FIG. 2(a) is a top view of a display panel, Figure 3 is a cross-sectional view of a first sub-pixel 111 of the display panel, Figure 4FIG. 2(b) is a schematic view of a cross-section of a second sub-pixel 121 of an embodiment of a display panel. In combination with reference to FIG. 2(a), Figures 2(a) to 4 The display panel includes a substrate (not shown in the figure), a plurality of sub-pixels 100, and a light shielding layer 200.

[0055] The substrate can include any one of a rigid substrate and a flexible substrate. The rigid substrate can be understood as a substrate that cannot be bent, and the material of the rigid substrate includes but is not limited to a glass substrate. The flexible substrate can be understood as a substrate that can be bent, folded, or rolled, and the material of the flexible substrate includes but is not limited to a polyimide (PI) substrate, an ultra-thin glass substrate, and the like.

[0056] The plurality of sub-pixels 100 are located on one side of the substrate. The sub-pixel 100 includes a light emitting device, and the light emitting device includes a light emitting layer 131. The type of the light emitting device includes but is not limited to an organic light emitting diode light emitting device (OLED), a quantum dot light emitting diode light emitting device (QLED), an electro-wetting light emitting device (EWD), an electro-phoretic light emitting device (EPD), or an electro-chromic light emitting device (ECD), and the like. The specific reference of the light emitting layer 131 is determined according to the type of the light emitting device. The colors of the light emitted by the plurality of sub-pixels 100 are not completely the same, for example, the plurality of sub-pixels 100 include but are not limited to a plurality of red sub-pixels 100, a plurality of green sub-pixels 100, and a plurality of blue sub-pixels 100. The sub-pixels 100 of different light emitting colors can mix light to display different pictures.

[0057] The plurality of sub-pixels 100 include a plurality of first sub-pixels 111 and a plurality of second sub-pixels 121. The light shielding layer 200 is located on the side of the plurality of sub-pixels 100 away from the substrate. Referring to FIG. 2(b), the light shielding layer 200 is configured to shield a portion of the emergent light beam of the second sub-pixel 121, which has an angle a with the normal of the display panel greater than a threshold angle, i.e., the angle a between the emergent light beam of the second sub-pixel 121 and the 0° normal of the display panel is greater than the threshold angle. In addition, the light shielding layer 200 is configured not to shield the emergent light beam of the first sub-pixel 111. It should be noted that the first sub-pixel 111 and the second sub-pixel 121 are only used to distinguish whether the sub-pixel 100 is shielded by the light shielding layer 200, and are not used to limit other properties of the sub-pixel 100 such as the light emitting color.

[0058] Based on the shielding relationship of the light shielding layer 200 to the sub-pixel 100, the first sub-pixel 111 can be understood as a shared sub-pixel 100, which means that the sub-pixel 100 can be seen by other users except the target user of the electronic device. The target user refers to a user who views the display panel at a normal viewing angle or a small viewing angle. The second sub-pixel 121 can be understood as a privacy sub-pixel 100, which means that the sub-pixel 100 cannot be seen or can only be seen in a small amount by other users except the target user of the electronic device. Since the light shielding layer 200 shields part of the second sub-pixel 121 from the normal viewing angle of the display panel, the user viewing the electronic device from the above-mentioned shielding direction cannot see or can only see a small amount of the light beam. Wherein, due to non-designed scattering or diffuse reflection and other reasons, part of the second sub-pixel 121 may be incident to the eyes of other users, but the above-mentioned incident to the eyes of other users is only a small part of the second sub-pixel 121, which can be ignored.

[0059] Specifically, the light shielding layer 200 shields the light beam of the second sub-pixel 121 in at least part of the large viewing angle direction. Since the target user usually views the display panel from the normal viewing angle or the small viewing angle, and other users except the target user usually view the display panel from the side, by shielding the light beam of the second sub-pixel 121 in at least part of the large viewing angle direction through the light shielding layer 200, the target user can normally see the light beam emitted by the second sub-pixel 121, and other users cannot see or can only see a small amount of the light beam emitted by the second sub-pixel 121 from the viewing angle greater than the threshold angle from the normal viewing angle of the display panel.

[0060] Further, the threshold angle of the large viewing angle is determined according to the size of the display panel and the viewing distance of the user. It should be noted that the viewing distance is a preset distance obtained by statistical method based on the actual distance of a large number of users using the display panel. Moreover, corresponding to different sizes of display panel, the viewing distance of the user is usually not the same.

[0061] Taking the display panel applied to a mobile phone as an example, the size of a 6.7-inch mobile phone is 7 cm*15.5 cm, the average viewing distance of a target user in daily use is 35 cm, the edge viewing angle of the target user when viewing the sub-pixel 100 located at the horizontal edge of the mobile phone is about 12.5°, and the edge viewing angle of the target user when viewing the sub-pixel 100 located at the vertical edge of the mobile phone is about 5.7°. Among them, the sub-pixel 100 at the horizontal edge is also the sub-pixel 100 close to the first side or the second side of the display device, and the sub-pixel 100 at the vertical edge is also the sub-pixel 100 close to the top edge or the bottom edge of the display device. Taking the display panel applied to a tablet computer as an example, the size of an 11-inch tablet computer is 13.7 cm*24.4 cm, the average viewing distance of a target user in daily use is 60 cm, the edge viewing angle of the target user when viewing the sub-pixel 100 located at the horizontal edge of the tablet computer is about 11.5°, and the edge viewing angle of the target user when viewing the sub-pixel 100 located at the vertical edge of the tablet computer is about 6.5°. Therefore, the edge viewing angle can be determined according to the size of the display panel and the viewing distance of the user, and the threshold viewing angle is greater than the edge viewing angle, so that when the target user uses it in daily life, the light shielding layer 200 will not block the outgoing light beam of the second sub-pixel 121, and the display effect of the target user when viewing the display device is ensured. In addition, the angle margin when the user views at a non-orthogonal angle can be further considered, and the above angle margin is added on the basis of the edge viewing angle to ensure the display quality when the user views the display device at a small viewing angle from a non-orthogonal angle.

[0062] Further, the threshold angle can be greater than or equal to 20°. In some examples, the threshold angle is also less than or equal to 45°. For example, the threshold angle is 25°, 30°, 35°, 40°, 45°, etc., which is not limited in the embodiment. That is, the light beam of the outgoing light beam of the second sub-pixel 121 and the orthogonal angle is greater than the threshold angle, which will be blocked by the light shielding layer 200, so that the light intensity of the second sub-pixel 121 at a large viewing angle is rapidly attenuated, the contrast at a large viewing angle is reduced, and the privacy function of the display panel is realized. For example, by shielding the second sub-pixel 121 through the light shielding layer 200, the brightness of the second sub-pixel 121 at a 30° viewing angle is only 6% of that at a 0° viewing angle, and the privacy function of the display panel is realized. In order to realize the above shielding relationship, the light shielding layer 200 can be provided with a plurality of light shielding openings, and the plurality of light shielding openings are respectively arranged corresponding to the plurality of second sub-pixels 121, and the light shielding openings are used for the outgoing light beam of the corresponding second sub-pixel 121. The light beam less than the threshold angle is emitted.

[0063] For example, the display panel can work in two display modes, namely a sharing mode and a privacy mode. In the sharing mode, the first sub-pixel 111 and the second sub-pixel 121 of the display panel emit light according to the to-be-displayed picture at the same time, and both the target user and the other user can see the picture displayed by the display panel. In the privacy mode, the second sub-pixel 121 emits light according to the to-be-displayed picture, and the first sub-pixel 111 does not emit light, so that the target user can see the light beams emitted by the second sub-pixel 121 from a viewing angle smaller than a threshold angle, and the other user cannot see or can only see a small amount of the light beams emitted by the second sub-pixel 121 from a viewing angle between the normal angle of the display panel and the threshold angle, thereby realizing the privacy function of the display device.

[0064] It can be understood that the smaller the threshold angle, the better the privacy effect of the display panel in the privacy mode, but in the sharing mode, the second sub-pixel 121 cannot contribute enough brightness, which may result in insufficient brightness and clarity of the display panel in the sharing mode. The larger the threshold angle, the greater the brightness that can be contributed by the second sub-pixel 121 in the sharing mode, so that the display panel has higher brightness and clarity in the sharing mode, but it also results in insufficient privacy effect of the display panel in the privacy mode. Therefore, the threshold angle can be appropriately selected to balance the privacy effect and display effect of the display panel, for example, the threshold angle is selected to be 30° to 45°.

[0065] The first light-emitting area of the first sub-pixel 111 is larger than the second light-emitting area of the second sub-pixel 121. The first light-emitting area is the area of the light-emitting layer 131 of the first sub-pixel 111, and the second light-emitting area is the area of the region of the light-emitting layer 131 of the second sub-pixel 121 that does not overlap with the light-blocking layer 200 in the thickness direction of the display panel.

[0066] Optionally, the area of the light-emitting layer 131 of the first sub-pixel 111 can be the same as or different from the area of the light-emitting layer 131 of the second sub-pixel 121. Specifically, in the case where the area of the light-emitting layer 131 of the first sub-pixel 111 is the same as the area of the light-emitting layer 131 of the second sub-pixel 121, the second light-emitting area of the second sub-pixel 121 is reduced by the blocking of the light-blocking layer 200, without the need for differential design of the light-emitting layer 131 of the first sub-pixel 111 and the light-emitting layer 131 of the second sub-pixel 121, thereby reducing the design difficulty of the first sub-pixel 111 and the second sub-pixel 121. In the case where the area of the light-emitting layer 131 of the first sub-pixel 111 is different from the area of the light-emitting layer 131 of the second sub-pixel 121, the area of the light-emitting layer 131 of the second sub-pixel 121 can be made smaller, thereby saving the amount of the light-emitting layer 131 material of the second sub-pixel 121.

[0067] In the embodiments of the application, by setting the light shielding layer 200, the light shielding layer 200 shields the part of the light beam emitted by the second sub-pixel 121, which has an angle greater than the threshold angle with the normal viewing angle of the display panel, and the light beam emitted by the second sub-pixel 121 is not greater than the threshold angle to the target user's eye, the target user viewing the display panel from the normal viewing angle or a small viewing angle can normally see the light beam emitted by the second sub-pixel 121, and other users cannot see or can only see a small amount of light beam emitted by the second sub-pixel 121 from the viewing angle with the normal viewing angle of the display panel. Based on this, when the display panel displays in the privacy mode by the second sub-pixel 121, other users cannot pry the picture under the premise that the target user normally watches the picture displayed by the display panel, and has a good privacy effect. Moreover, by setting the first light emitting area of the first sub-pixel 111 to be greater than the second light emitting area of the second sub-pixel 121, the larger first light emitting area can be used to ensure that the first sub-pixel 111 contributes sufficient luminous brightness when the display panel displays in the sharing mode by the first sub-pixel 111 and the second sub-pixel 121 together, thereby improving the overall display brightness and clarity of the display panel, and achieving a balance between the privacy effect and the sharing mode display effect.

[0068] In one of the embodiments, the area of the light emitting layer 131 of the first sub-pixel 111 is greater than the area of the light emitting layer 131 of the second sub-pixel 121. It can be understood that the closer the distance between the light emitting layers 131 of the sub-pixels 100, the higher the process requirement for the preparation of the sub-pixels 100. Therefore, compared with the first sub-pixel 111, the embodiment appropriately reduces the area of the light emitting layer 131 of the second sub-pixel 121, which can increase the distance between the light emitting layers 131 of adjacent second sub-pixels 121, thereby reducing the requirement for the preparation process of the second sub-pixel 121 and improving the preparation yield of the display panel. Moreover, the area of the light emitting layer 131 of the second sub-pixel 121 is set to be smaller, which can also save the amount of light emitting layer 131 material of the second sub-pixel 121. Optionally, the light emitting layer 131 of the second sub-pixel 121 can partially overlap the light shielding layer 200, or the orthographic projection of the light emitting layer 131 of the second sub-pixel 121 on the substrate coincides with the orthographic projection of the light shielding opening of the light shielding layer 200 on the substrate, which is not limited in the embodiment.

[0069] In one of the embodiments, in the case that the orthographic projection of the light-emitting layer 131 of the second sub-pixel 121 on the substrate overlaps with the orthographic projection of the light-shielding opening of the light-shielding layer 200 on the substrate, the light-emitting layer 131 of the second sub-pixel 121 and the light-shielding layer 200 can jointly shield the metal trace located below the light-emitting layer 131, where "below" refers to the direction in which the light-emitting layer 131 is close to the substrate. It can be understood that, if there is a gap between the light-emitting layer 131 of the second sub-pixel 121 and the light-shielding layer 200, the gap can expose part of the metal trace located below, and the exposed metal trace can reflect ambient light, thereby causing the display effect of the display panel to decrease. In the present embodiment, due to the fact that the light-emitting layer 131 of the second sub-pixel 121 does not partially overlap with the light-shielding layer 200, the area of the light-emitting layer 131 of the second sub-pixel 121 can be made smaller and the distance between the light-emitting layers 131 of the adjacent second sub-pixels 121 can be made larger without exposing the metal trace, thereby further reducing the requirement on the preparation process of the second sub-pixel 121 and improving the preparation yield of the display panel. Moreover, the fact that the area of the light-emitting layer 131 of the second sub-pixel 121 is made smaller can also save the amount of the material of the light-emitting layer 131 of the second sub-pixel 121.

[0070] In one of the embodiments, the display panel includes a plurality of first light-emitting units 110 and a plurality of second light-emitting units 120, the plurality of first light-emitting units 110 include a plurality of first sub-pixels 111 adjacent to each other, and the plurality of second light-emitting units 120 include a plurality of second sub-pixels 121 adjacent to each other.

[0071] Specifically, the light-emitting colors of the plurality of first sub-pixels 111 in the same first light-emitting unit 110 are different, for example, the light-emitting colors of the plurality of first sub-pixels 111 in the first light-emitting unit 110 are red, green and blue respectively, or the light-emitting colors of the plurality of first sub-pixels 111 in the first light-emitting unit 110 are red, green, blue and white respectively. The light-emitting colors of the plurality of second sub-pixels 121 in the same second light-emitting unit 120 are different, for example, the light-emitting colors of the plurality of second sub-pixels 121 in the second light-emitting unit 120 are red, green and blue respectively, or the light-emitting colors of the plurality of second sub-pixels 121 in the second light-emitting unit 120 are red, green, blue and white respectively. The arrangement mode of the first sub-pixels 111 in the first light-emitting unit 110 can be the same as or different from the arrangement mode of the second sub-pixels 121 in the second light-emitting unit 120, which is not limited in the present embodiment.

[0072] Optionally, the plurality of sub-pixels 100 in the same light-emitting unit can be arranged in any one of the following modes: full RGB arrangement, PenTile arrangement, Delta arrangement, etc., which is not limited in the present embodiment.

[0073] The full RGB arrangement refers to that each light emitting unit is composed of one red sub-pixel 100, one green sub-pixel 100 and one blue sub-pixel 100, and there is no sharing of sub-pixels 100 between different light emitting units. The display panel adopting the full RGB arrangement has the highest color purity and no resolution loss, but has a higher cost.

[0074] The PenTile arrangement refers to an arrangement mode in which each two adjacent light emitting units share one sub-pixel 100, and is usually composed of one red sub-pixel 100, two green sub-pixels 100 and one blue sub-pixel 100 to form two light emitting units, which are arranged in a rhombus interlaced manner as shown, to realize the sharing of sub-pixels 100. The display panel adopting the PenTile arrangement has lower power consumption and cost, but is prone to the problem of jaggies during display. Figure 5

[0075] The Delta arrangement refers to an arrangement mode in which each three adjacent light emitting units share one sub-pixel 100, and is usually composed of one red sub-pixel 100, one green sub-pixel 100 and one blue sub-pixel 100 to form three light emitting units. That is, one light emitting unit includes a red sub-pixel 100 and shares a green sub-pixel 100 and a blue sub-pixel 100 with adjacent light emitting units, another light emitting unit includes a green sub-pixel 100 and shares a red sub-pixel 100 and a blue sub-pixel 100 with adjacent light emitting units, and the other light emitting unit includes a blue sub-pixel 100 and shares a green sub-pixel 100 and a red sub-pixel 100 with adjacent light emitting units. The display panel adopting the Delta arrangement has lower power consumption and cost, but is extremely prone to the problem of detail blur during display.

[0076] It should be noted that the above three arrangement modes of sub-pixels 100 are only used for exemplary illustration, and are not used to limit the protection scope of the present embodiment.

[0077] ​In an example, the second light emitting units 120 are arranged between the at least two first light emitting units 110. In another example, the first light emitting units 110 are arranged between the at least two second light emitting units 120. In yet another example, the second light emitting units 120 are arranged between the at least two first light emitting units 110, and the first light emitting units 110 are arranged between the at least two second light emitting units 120. The above arrangement can be understood as that the first light emitting units 110 and the second light emitting units 120 are alternately arranged. By arranging the second light emitting units 120 between the at least two first light emitting units 110, the case that the brightness of the area where the first light emitting units 110 are arranged in a concentrated manner is obviously higher than that of other areas when the display panel displays can be reduced. By arranging the first light emitting units 110 between the at least two second light emitting units 120, the case that the brightness of the area where the second light emitting units 120 are arranged in a concentrated manner is obviously lower than that of other areas when the display panel displays can be reduced. Therefore, the arrangement of the present embodiment can reduce the case that the display panel is locally too bright or too dark, so that the display panel has better display uniformity.

[0078] Figure 6 FIG. 2 is a top view of a display panel according to an embodiment of the present disclosure; Figure 6 In an embodiment, the first light emitting units 110 are arranged as a plurality of first light emitting rows 101, and the second light emitting units 120 are arranged as a plurality of second light emitting rows 103. The extension direction of the light emitting row can be referred to as the row direction, and the row direction is perpendicular to the column direction. After the display panel is assembled into a display device, the row direction is parallel to the extension direction of the top and bottom edges of the display device, and the column direction is parallel to the extension direction of the first and second side edges of the display device. Specifically, the plurality of sub-pixels 100 in the same light emitting row are connected to the same scanning signal line, and the plurality of sub-pixels 100 in the same column are connected to the same data signal line. The sub-pixel 100 is used to refresh the light emitting brightness according to the data signal transmitted by the data signal line when the scanning signal transmitted by the connected scanning signal line is enabled. Therefore, arranging the first light emitting units 110 as a plurality of first light emitting rows 101, in the case of the privacy mode, since the first sub-pixels 111 do not emit light, the scanning signals transmitted by the scanning signal lines connected to the plurality of first light emitting rows 101 can be simultaneously enabled, so that the brightness of the first sub-pixels 111 of the plurality of first light emitting rows 101 is refreshed to zero gray scale through the plurality of data signal lines at the same time, thereby improving the refresh efficiency of the display panel.

[0079] Further, the plurality of first light emitting rows 101 and the plurality of second light emitting rows 103 are arranged alternately in the column direction. That is, in the column direction, the first light emitting row 101, the second light emitting row 103, the first light emitting row 101, the second light emitting row 103, and so on are arranged. By arranging the first light emitting row 101 and the second light emitting row 103 alternately in the column direction, the first light emitting row 101 or the second light emitting row 103 is arranged dispersedly. When the display panel displays, the arrangement manner of the embodiment can reduce the case that the display panel is locally too bright or locally too dark, so as to make the display panel have better display uniformity.

[0080] Figure 7 FIG. 4 is a top view of a partial schematic diagram of a display panel according to an embodiment, and Figure 7 In an embodiment, the plurality of first light emitting units 110 are arranged as a plurality of first light emitting columns 102, and the plurality of second light emitting units 120 are arranged as a plurality of second light emitting columns 104. The extension direction of the light emitting column is referred to as the column direction, and the column direction is perpendicular to the row direction. After the display panel is assembled into a display device, the row direction is parallel to the extension direction of the top edge and the bottom edge of the display device, and the column direction is parallel to the extension direction of the first side edge and the second side edge of the display device. Specifically, the plurality of sub-pixels 100 located in the same light emitting row are connected to the same scanning signal line, and the plurality of sub-pixels 100 located in the same column are connected to the same data signal line. The sub-pixel 100 is used to refresh the light emitting brightness according to the data signal transmitted by the data signal line when the scanning signal transmitted by the connected scanning signal line is enabled. Therefore, the plurality of first light emitting units 110 are arranged as a plurality of first light emitting columns 102. In the case of the privacy mode, since the first sub-pixel 111 does not emit light, when data refreshing is performed, the data signal transmitted by the data signal line connected to the first light emitting column 102 does not need to be updated, so as to reduce the complexity of data writing and avoid power consumption caused by the change of the data signal corresponding to the first sub-pixel 111.

[0081] Further, the plurality of first light emitting columns 102 and the plurality of second light emitting columns 104 are arranged alternately in the column direction. That is, in the row direction, the first light emitting column 102, the second light emitting column 104, the first light emitting column 102, the second light emitting column 104, and so on are arranged. By arranging the first light emitting column 102 and the second light emitting column 104 alternately in the column direction, the first light emitting column 102 or the second light emitting column 104 is arranged dispersedly. When the display panel displays, the arrangement manner of the embodiment can reduce the case that the display panel is locally too bright or locally too dark, so as to make the display panel have better display uniformity.

[0082] Figure 8 FIG. 4 is a top view of a partial schematic diagram of a display panel according to an embodiment, and Figure 8In one of the embodiments, the first light emitting unit 110 is adjacent to the second light emitting unit 120 in the row direction and the column direction, and the second light emitting unit 120 is adjacent to the first light emitting unit 110 in the row direction and the column direction. In this embodiment, the display uniformity of the display panel can be further improved by the uniformly arranged first light emitting unit 110 and the second light emitting unit 120.

[0083] In one of the embodiments, the projection of the light shielding layer 200 in the thickness direction of the display panel is located on at least one side of the second sub-pixel 121 in the row direction and the column direction. Figures 6 to 8 In one of the embodiments, the projection of the light shielding layer 200 in the thickness direction of the display panel is located on both sides of the second sub-pixel 121 in the row direction and on one side of the second sub-pixel 121 in the column direction, specifically on the upper side of the second sub-pixel 121 in the column direction and not on the lower side of the second sub-pixel 121 in the column direction, thereby achieving the shielding of the second sub-pixel 121 within a 270° range in the circumferential direction. The upper side is the side close to the top edge of the display device, and the lower side is the side close to the bottom edge of the display device. Since the target user usually watches the picture from the lower side of the electronic device in daily use of the electronic device, by arranging the projection of the light shielding layer 200 not on the lower side of the second sub-pixel 121 in the column direction, the light beam shielding when the target user watches the picture can be reduced, and the viewing quality of the target user can be ensured.

[0084] In some embodiments, the projection of the light shielding layer 200 in the thickness direction of the display panel is only located on both sides of the second sub-pixel 121 in the row direction and not on both sides of the second sub-pixel 121 in the column direction. Since other users usually watch the picture from the left and right sides of the electronic device in the row direction and less from the upper side of the electronic device, the projection of the light shielding layer 200 not on the upper side of the second sub-pixel 121 in the column direction has less effect on the privacy protection effect, and can increase the second light emitting area of the second sub-pixel 121, thereby making the display panel have higher display brightness and clarity.

[0085] In one of the embodiments, the display panel is a flexible display panel, so that when the display panel is assembled in the display device, a waterfall screen form can be formed. The waterfall screen refers to the two side edges of the display panel being vertically bent at an ultra-large angle of 80°-90°, completely wrapping the middle frame, and visually having no physical middle frame and no screen black border, presenting a "waterfall pouring" like borderless effect. Therefore, the display panel of the waterfall screen can be divided into a middle area and two edge areas located on the opposite sides of the middle area. It can be understood that when the target user watches the two side edges of the display panel, due to the special setting angle, if the edge area and the middle area are provided with the same light shielding layer 200, the outgoing light beams of the second sub-pixels 121 in the edge area may not be incident on the human eye of the target user under the shielding of the light shielding layer 200. Therefore, the light shielding layer 200 corresponding to the second sub-pixel 121 in the edge area can be specially designed, so that the projection of the light shielding layer 200 in the thickness direction of the display panel is located in the area of the second sub-pixel 121 close to the middle area, which is smaller than the area of the second sub-pixel 121 away from the middle area, thereby increasing the light quantity of the outgoing light beams of the second sub-pixel 121 in the edge area of the light shielding layer 200 incident on the human eye of the target user.

[0086] Figure 9 FIG. 5 is a top view of a partial schematic diagram of a display panel according to one embodiment, referring to Figure 9 In one of the embodiments, the first distance L1 between the light emitting layers 131 of the two adjacent first sub-pixels 111 is smaller than the second distance L2 between the effective light emitting areas of the two adjacent second sub-pixels 121. The effective light emitting area is the area of the light emitting layer 131 of the second sub-pixel 121 that does not overlap with the light shielding layer 200 in the thickness direction of the display panel. For example, the first distance L1 is 6-14 um, such as 6 um, 7 um, 8 um, 9 um, 10 um, 11 um, 12 um, 13 um, or 14 um. The second distance L2 is 18-22 um, such as 18 um, 19 um, 20 um, 21 um, or 22 um. In this embodiment, by setting a smaller first distance L1, the area of the light emitting layer 131 of the first sub-pixel 111 is larger, and the aperture ratio of the display panel is improved, thereby ensuring the luminance and clarity of the display panel in the sharing mode. By setting a larger second distance L2, the light shielding layer 200 can better shield the outgoing light beams of the second sub-pixel 121, thereby improving the anti-peeping effect of the display panel.

[0087] In one of the embodiments, the projection of the light shielding layer 200 in the thickness direction of the display panel is located between the second sub-pixel 121 and one of the adjacent first sub-pixels 111, and is not located between the second sub-pixel 121 and the other of the adjacent first sub-pixels 111. For example Figure 9The projection of the light shielding layer 200 in the thickness direction of the display panel is located between the second sub-pixel 121 and a first sub-pixel 111 adjacent to the upper side, and is not located between the second sub-pixel 121 and another first sub-pixel 111 adjacent to the lower side. The third distance L3 between the effective light-emitting area of the second sub-pixel 121 and the light-emitting layer 131 of a first sub-pixel 111 is greater than the fourth distance L4 between the effective light-emitting area of the second sub-pixel 121 and the light-emitting layer 131 of another first sub-pixel 111. Exemplarily, the third distance L3 is 18 um to 22 um, for example, 18 um, 19 um, 20 um, 21 um, or 22 um. The second distance L2 is 6 um to 14 um, for example, 6 um, 7 um, 8 um, 9 um, 10 um, 11 um, 12 um, 13 um, or 14 um. In the embodiment, by setting a larger third distance L3, the shielding of the light beam emitted by the first sub-pixel 111 by the light shielding layer 200 can be avoided or reduced. By setting a smaller fourth distance L4, the area of the first sub-pixel 111 can be increased, and the aperture ratio of the display panel can be improved, thereby ensuring the luminous brightness and clarity of the display panel in the sharing mode.

[0088] In one of the embodiments, the display panel further includes an isolation structure 300. The isolation structure 300 is located on the side of the light shielding layer 200 close to the substrate, and the isolation structure 300 encloses a plurality of light-emitting openings. The projection of the light-emitting opening in the thickness direction of the display panel coincides with the light-emitting layer 131 of the plurality of sub-pixels 100. The top width of the section of the isolation structure 300 at any position is greater than the bottom width, and the section is perpendicular to the extension direction of the isolation structure 300 at the position. Specifically, by using the above-mentioned isolation structure 300, the light-emitting material can be deposited on the whole surface when the light-emitting layer 131 is prepared, and the light-emitting material will be broken into two parts at the edge of the isolation structure 300. The two parts of the light-emitting material include a part falling in the light-emitting opening and another part falling on the top surface of the isolation structure 300 away from the substrate, and the light-emitting material falling in the light-emitting opening serves as the light-emitting layer 131 of the sub-pixel 100. Therefore, the embodiment does not need a fine metal mask (FMM) to form the light-emitting layer 131. By using the FMM-free technology, the embodiment can overcome the limitation of the FMM photolithography technology on the gap distance between the sub-pixels 100, thereby further increasing the area of the light-emitting layer 131 of the first sub-pixel 111, and optimizing the arrangement mode of the sub-pixels 100.

[0089] Specifically, considering the strength problem of the FMM, a relatively wide bridge needs to be set between adjacent sub-pixels 100 of the FMM, which will form an obstruction in the evaporation process of the light-emitting layer 131, thereby causing a gap between the adjacent sub-pixels 100. Moreover, considering the evaporation shadow effect in the evaporation process, the gap between the adjacent sub-pixels 100 cannot be too small. The evaporation shadow effect refers to the phenomenon that, when the evaporation material is deposited, the sub-pixel 100 opening area is not completely covered by the evaporation material due to the obstruction of the metal skeleton of the FMM, the substrate protrusion, or the structure of the adjacent sub-pixel 100, thereby forming a local shadow area. The evaporation shadow effect directly affects the light-emitting uniformity, aperture ratio, and device performance of the pixel, especially in the evaporation process of the FMM. Therefore, the further reduction of the gap distance between the sub-pixels 100 is greatly limited by the FMM photolithography technology. In the present embodiment, since the FMM photolithography technology is not used, the staggered arrangement mode of the sub-pixels 100 shown in FIG. 1 is not used, and the full RGB arrangement mode can be used, thereby further improving the pixel resolution of the display panel. Figure 10

[0090] Moreover, in the case of using the staggered arrangement mode, the light-emitting colors of the multiple sub-pixels 100 in the same column of sub-pixels 100 are not completely the same. When displaying a monochrome image, the data signal on the data signal line needs to be constantly changed at each row data refresh. Taking the display of a red image as an example, referring to FIG. 2, the data signal on the data signal line needs to be constantly changed at each row data refresh. Figure 11 However, in the case of using the full RGB arrangement of the present embodiment, the light-emitting colors of the same column of sub-pixels 100 are the same, for example, the first column of sub-pixels 111 are all red sub-pixels 100, the second column of sub-pixels 121 are all green sub-pixels 100, and the third column of sub-pixels 100 are all blue sub-pixels 100. Each column is independently provided with a data signal line, and when displaying a monochrome image, the data signal on the data signal line does not need to be changed at each row data refresh. Taking the display of a red image as an example, referring to FIG. 3, the data signal on each data signal line does not need to be changed. That is, the data signal can be optimized from an alternating voltage to a direct voltage, thereby reducing the power consumption of the display panel. Figure 12

[0091] ​​In one of the embodiments, the light shielding layer 200 includes a first light shielding sub-layer 210 and a second light shielding sub-layer 220, the second light shielding sub-layer 220 is located on the side of the first light shielding sub-layer 210 away from the substrate, the first light shielding sub-layer 210 is provided with a plurality of first openings, and the second light shielding sub-layer 220 is provided with a plurality of second openings. At least part of the first openings and the second openings are correspondingly arranged, and the first opening and the corresponding second opening are used to shield the same first sub-pixel 111. Specifically, the first light shielding sub-layer 210 and the second light shielding sub-layer 220 can be spaced by optical glue filling. Further, by setting multiple layers of optical glue with different refractive indexes, the direction of the outgoing light beam of the second sub-pixel 121 can be adjusted, so that at least part of the light beams with large viewing angles can be emitted from small viewing angles or even normal viewing angles, thereby ensuring the shielding of the part of the outgoing light beam of the display panel with an angle greater than a threshold angle, and allowing more light beams to be incident on the human eye of the target user, thereby improving the overall brightness and clarity of the display panel in the sharing mode and the privacy mode. Moreover, by splitting the light shielding layer 200 into the first light shielding sub-layer 210 and the second light shielding sub-layer 220, the positions of the first openings and the second openings can be more flexibly set, thereby more accurately shielding the light beams in the required direction.

[0092] In one of the embodiments, the first opening size of the first opening is greater than the second opening size of the corresponding second opening. For example, the first opening size is 5um to 12um, such as 5um, 6um, 7um, 8um, 9um, 10um, 11um, or 12um. The first opening size is 2um to 8um, such as 2um, 3um, 4um, 5um, 6um, 7um, or 8um.

[0093] The embodiments of the present application also provide a display panel manufacturing method, Figure 13 For the flowchart of the display panel manufacturing method of one embodiment, refer to Figure 13 In one of the embodiments, the display panel manufacturing method includes steps 1302 to 1306.

[0094] Step 1302, providing a substrate.

[0095] The substrate can include any one of a rigid substrate and a flexible substrate. The rigid substrate can be understood as a substrate that cannot be bent, and the material of the rigid substrate includes but is not limited to a glass substrate. The flexible substrate can be understood as a substrate that can be bent, folded, or rolled, and the material of the flexible substrate includes but is not limited to a polyimide (PI) substrate, an ultra-thin glass (UTG) substrate, etc.

[0096] Step 1304, forming a plurality of sub-pixels 100 on one side of the substrate.

[0097] The sub-pixel 100 includes a light-emitting device including a light-emitting layer 131. The type of the light-emitting device includes, but is not limited to, an Organic Light Emitting Diode (OLED), a Quantum Dot Light Emitting Diode (QLED), an Electro-Wetting Display (EWD), an Electro-Phoretic Display (EPD), or an Electro-Chromic Display (ECD), etc. The specific reference of the light-emitting layer 131 is determined according to the type of the light-emitting device. The colors of the light emitted by the plurality of sub-pixels 100 are not completely the same, for example, the plurality of sub-pixels 100 include, but are not limited to, a plurality of red sub-pixels 100, a plurality of green sub-pixels 100, and a plurality of blue sub-pixels 100, and the sub-pixels 100 of different light-emitting colors can mix light to display different pictures.

[0098] Step 1306, forming the light shielding layer 200 on the side of the sub-pixel 100 away from the substrate.

[0099] The plurality of sub-pixels 100 include a plurality of first sub-pixels 111 and a plurality of second sub-pixels 121. The light shielding layer 200 is located on the side of the plurality of sub-pixels 100 away from the substrate, and the light shielding layer 200 is configured to shield a part of the emergent light beam of the second sub-pixel 121, which has an angle greater than a threshold angle with the normal viewing angle of the display panel, and the light shielding layer 200 is configured not to shield the emergent light beam of the first sub-pixel 111. It should be noted that the first sub-pixel 111 and the second sub-pixel 121 are only used to distinguish whether the sub-pixel 100 is shielded by the light shielding layer 200, and are not used to limit other attributes such as the light-emitting color of the sub-pixel 100.

[0100] Based on the shielding relationship of the light shielding layer 200 to the sub-pixel 100, the first sub-pixel 111 can be understood as a shared sub-pixel 100, which means that the sub-pixel 100 whose emergent light beam can be seen by other users except the target user of the electronic device. The target user refers to a user who views the display panel at a normal viewing angle or a small viewing angle. The second sub-pixel 121 can be understood as a privacy sub-pixel 100, which means that the sub-pixel 100 whose emergent light beam cannot be seen or can be seen in small amount by other users except the target user of the electronic device. Since the light shielding layer 200 shields a part of the emergent light beam of the second sub-pixel 121, which has an angle greater than a threshold angle with the normal viewing angle of the display panel, a user viewing the electronic device from the above-mentioned shielding direction cannot see or can see the emergent light beam in a small amount.

[0101] Specifically, the light shielding layer 200 shields the light beams emitted by the second sub-pixel 121 in at least part of the large viewing angle direction. Since the target user usually views the display panel from the normal viewing angle or a small viewing angle, and other users except the target user usually view the display panel from the side, by shielding the light beams emitted by the second sub-pixel 121 in at least part of the large viewing angle direction through the light shielding layer 200, the target user can normally see the light beams emitted by the second sub-pixel 121, and other users cannot see or can only see a small amount of light beams emitted by the second sub-pixel 121 from a viewing angle with an included angle with the normal viewing angle of the display panel greater than a threshold angle.

[0102] Further, the threshold angle of the large viewing angle is determined according to the size of the display panel and the viewing distance of the user. Taking the case that the display panel is applied to a mobile phone as an example, the size of a 6.7-inch mobile phone is 7cm*15.5cm, the average viewing distance of the target user in daily use is 35cm, the edge viewing angle of the target user when viewing the sub-pixel 100 located at the horizontal edge of the mobile phone is about 12.5°, and the edge viewing angle of the target user when viewing the sub-pixel 100 located at the vertical edge of the mobile phone is about 5.7°. Among them, the sub-pixel 100 at the horizontal edge is the sub-pixel 100 close to the first side or the second side of the display device, and the sub-pixel 100 at the vertical edge is the sub-pixel 100 close to the top edge or the bottom edge of the display device. Taking the case that the display panel is applied to a tablet computer as an example, the size of an 11-inch tablet computer is 13.7cm*24.4cm, the average viewing distance of the target user in daily use is 60cm, the edge viewing angle of the target user when viewing the sub-pixel 100 located at the horizontal edge of the tablet computer is about 11.5°, and the edge viewing angle of the target user when viewing the sub-pixel 100 located at the vertical edge of the tablet computer is about 6.5°. Therefore, the edge viewing angle can be determined according to the size of the display panel and the viewing distance of the user, and the threshold viewing angle is set to be greater than the edge viewing angle, so that when the target user uses it in daily use, the light shielding layer 200 will not shield the light beams emitted by the second sub-pixel 121, and the display effect when the target user views the display device is ensured. In addition, the angle margin when the user views from a non-normal viewing angle can be further considered, and the above angle margin is added on the basis of the edge viewing angle to ensure the display quality when the user views the display device from a small viewing angle of a non-normal viewing angle.

[0103] Further, the threshold angle can be greater than 20°, for example, the threshold angle is 25°, 30°, 35°, 40°, 45°, etc., and the embodiment is not limited. That is, the light beam between the normal angle of the display panel and the second sub-pixel 121 is greater than the threshold angle. The light beam is blocked by the light shielding layer 200, so that the light beam of the second sub-pixel 121 at a large viewing angle is rapidly attenuated, the contrast at a large viewing angle is reduced, and the privacy function of the display panel is realized. For example, by shielding the second sub-pixel 121 through the light shielding layer 200, the brightness of the second sub-pixel 121 at a 30° viewing angle is only 6% of the brightness at a 0° viewing angle, and the privacy function of the display panel is realized. In order to realize the shielding relationship, the light shielding layer 200 can be provided with a plurality of light shielding openings, and the plurality of light shielding openings are respectively arranged corresponding to the plurality of second sub-pixels 121. The light shielding opening is used for the light beam of the corresponding second sub-pixel 121 to exit, which is less than the threshold angle.

[0104] For example, the display panel can work in two display modes, namely sharing mode and privacy mode. In the sharing mode, the first sub-pixel 111 and the second sub-pixel 121 of the display panel emit light according to the to-be-displayed picture, and the target user and other users can see the picture displayed by the display panel. In the privacy mode, the second sub-pixel 121 of the display panel emits light according to the to-be-displayed picture, and the first sub-pixel 111 does not emit light, so that the target user can see the light beam emitted by the second sub-pixel 121 from a viewing angle less than the threshold angle, and other users cannot see or can only see a small amount of light beam emitted by the second sub-pixel 121 from a viewing angle greater than the threshold angle with the normal angle of the display panel, thereby realizing the privacy function of the display device.

[0105] It can be understood that the smaller the threshold angle, the better the privacy effect of the display panel in the privacy mode, but in the sharing mode, the second sub-pixel 121 cannot contribute enough brightness, which may result in insufficient brightness and clarity of the display panel in the sharing mode. The larger the threshold angle, the greater the brightness that can be contributed by the second sub-pixel 121 in the sharing mode, so that the display panel has higher brightness and clarity in the sharing mode, but it also results in insufficient privacy effect of the display panel in the privacy mode. Therefore, the threshold angle can be appropriately selected to balance the privacy effect and display effect of the display panel, for example, the threshold angle is 30° to 45°.

[0106] The first light-emitting area of the first sub-pixel 111 is greater than the second light-emitting area of the second sub-pixel 121. The first light-emitting area is the area of the light-emitting layer 131 of the first sub-pixel 111, and the second light-emitting area is the area of the region of the light-emitting layer 131 of the second sub-pixel 121 which does not overlap with the light shielding layer 200 in the thickness direction of the display panel.

[0107] Optionally, the area of the light-emitting layer 131 of the first sub-pixel 111 and the area of the light-emitting layer 131 of the second sub-pixel 121 can be the same or different. Specifically, in the case where the area of the light-emitting layer 131 of the first sub-pixel 111 and the area of the light-emitting layer 131 of the second sub-pixel 121 are the same, the second light-emitting area of the second sub-pixel 121 is reduced by shielding the second sub-pixel 121 by the light-shielding layer 200, without the need to design the light-emitting layer 131 of the first sub-pixel 111 and the light-emitting layer 131 of the second sub-pixel 121 differently, thereby reducing the design difficulty of the first sub-pixel 111 and the second sub-pixel 121. In the case where the area of the light-emitting layer 131 of the first sub-pixel 111 and the area of the light-emitting layer 131 of the second sub-pixel 121 are different, the area of the light-emitting layer 131 of the second sub-pixel 121 can be made smaller, thereby saving the amount of light-emitting layer 131 material of the second sub-pixel 121.

[0108] In an embodiment of the application, by providing the light-shielding layer 200, the light-shielding layer 200 shields the part of the outgoing light beam of the second sub-pixel 121 that has an angle greater than the threshold angle with the normal viewing angle of the display panel, and the light beam of the second sub-pixel 121 that has an angle not greater than the threshold angle is emitted to the target user's eye, so that the target user viewing the display panel from the normal viewing angle or a small viewing angle can normally see the light beam emitted by the second sub-pixel 121, and other users cannot see or can only see a small amount of the light beam emitted by the second sub-pixel 121 from a viewing angle having an angle greater than the threshold angle with the normal viewing angle of the display panel. Based on this, when the display panel displays in the privacy mode by the second sub-pixel 121, other users cannot pry the display under the premise that the target user normally views the display of the display panel, and has a good privacy effect. Moreover, by setting the first light-emitting area of the first sub-pixel 111 to be greater than the second light-emitting area of the second sub-pixel 121, the larger first light-emitting area can be used to ensure that the first sub-pixel 111 contributes sufficient light-emitting brightness when the display panel displays in the sharing mode by the first sub-pixel 111 and the second sub-pixel 121 together, thereby improving the overall display brightness and clarity of the display panel, and achieving a balance between the privacy effect and the display effect in the sharing state.

[0109] Figure 14 For a sub-flowchart of an embodiment of forming a plurality of sub-pixels 100 on one side of a substrate, reference is made to Figure 14 In one of the embodiments, forming a plurality of sub-pixels 100 on one side of a substrate includes steps 1402 to 1404.

[0110] Step 1402: Forming an isolation structure 300 on one side of a substrate.

[0111] The isolation structure 300 encloses multiple light-emitting openings. The top width of the cross-section at any point in the isolation structure 300 is greater than its bottom width, and the cross-section is perpendicular to the extending direction of the isolation structure 300 at that point. Specifically, the isolation structure 300 is formed on one side of the substrate, including using VSS traces as metal isolation pillars 310, and forming a shielding layer 320 on the side of the metal isolation pillars 310 away from the substrate. The orthogonal projection of the shielding layer 320 onto the substrate completely covers the orthogonal projection of the metal isolation pillars 310 onto the substrate. The VSS traces can be fabricated using a TiAlTi layer.

[0112] Step 1404: Deposit light-emitting material on the side of the substrate near the isolation structure 300 to form a plurality of sub-pixels 100.

[0113] The light-emitting material is broken into two parts at the edge of the isolation structure 300. The two parts of the light-emitting material include a part that falls into the light-emitting opening and another part that falls on the top surface of the isolation structure 300 away from the substrate. The light-emitting material located in the light-emitting opening serves as the light-emitting layer 131 of the sub-pixel 100.

[0114] Specifically, a light-emitting material is deposited on the side of the substrate near the isolation structure 300 to form a plurality of sub-pixels 100, including: forming light-emitting materials corresponding to the light-emitting openings inside and outside the light-emitting openings, with the light-emitting materials being disconnected by the light-emitting openings. A cathode layer 133 is formed in contact with the light-emitting material in the light-emitting openings. An encapsulation material layer is formed covering the light-emitting layer 131 and the sidewalls of the isolation structure 300. A patterned photoresist is formed on the encapsulation material layer. Based on the patterned photoresist, the encapsulation material layer is etched to form an encapsulation portion 400, which covers the light-emitting layer 131 located inside the light-emitting opening and extends through the sidewalls of the isolation structure 300 to the light-emitting layer 131 located on the side of the isolation structure 300 facing away from the substrate. Based on the encapsulation portion 400, the cathode layer 133 located outside the light-emitting opening is etched for the first time to expose the light-emitting layer 131. The patterned photoresist and the light-emitting layer 131 located outside the light-emitting opening are removed in the same process, and the light-emitting layer 131 remaining inside the light-emitting opening forms the sub-pixel 100.

[0115] Furthermore, before forming the isolation structure 300 on one side of the substrate, the method further includes: forming an anode layer 132, which together with the light-emitting layer 131 and the cathode layer 133 in the light-emitting opening to form a sub-pixel 100. A pixel definition layer 134 is formed on the side of the anode layer 132 away from the substrate. The isolation structure 300 is located on the side of the pixel definition layer 134 away from the substrate.

[0116] In this embodiment, based on the aforementioned isolation structure 300, the light-emitting layer 131 can be formed without a fine metal mask (FMM). By employing FMM-free technology, this embodiment overcomes the limitation of FMM lithography on the gap distance between sub-pixels 100, thereby further increasing the area of ​​the light-emitting layer 131 of the first sub-pixel 111 and optimizing the arrangement of the sub-pixels 100. Moreover, this embodiment can achieve independent packaging of a single sub-pixel 100 while simultaneously blocking the lateral transport of the light-emitting layer 131 material.

[0117] This application also provides a method for controlling a display panel, used to control the display panel as described above. Figure 15 A flowchart of a control method for a display panel according to an embodiment is provided, with reference to... Figure 15 In one embodiment, the method for controlling the display panel includes steps 1502 to 1506.

[0118] Step 1502: Obtain the current display mode.

[0119] Step 1504: When the display mode is shared mode, control multiple first sub-pixels 111 and multiple second sub-pixels 121 to emit light according to the screen to be displayed. Figure 16 This is a schematic diagram of a display panel in shared mode according to one embodiment, with reference to... Figure 16 In the shared mode, multiple first sub-pixels 111 and multiple second sub-pixels 121 jointly display the screen to be displayed.

[0120] Step 1506: When the display mode is privacy mode, control multiple second sub-pixels 121 to emit light according to the image to be displayed. Figure 17 This is a schematic diagram of a display panel in privacy mode according to one embodiment, with reference to... Figure 17 In the privacy mode, only multiple second sub-pixels 121 display the image to be displayed. Furthermore, since the number of sub-pixels 100 actually displayed in the privacy mode is reduced compared to the sharing mode, directly displaying the image to be displayed may result in abrupt grayscale changes between adjacent sub-pixels 100. Therefore, the image to be displayed can be downsampled according to the arrangement of the first sub-pixels 111 and the second sub-pixels 121, making the grayscale transition between adjacent sub-pixels 100 smoother during image display. Furthermore, the luminous intensity of the second sub-pixels 121 can be appropriately increased to compensate for the brightness loss of the non-luminous first sub-pixels 111, improving the brightness and clarity of the display in the privacy mode. Optionally, the luminous intensity of the second sub-pixels 121 can be amplified according to a preset mapping relationship or proportionally; this embodiment is not limited to this.

[0121] This application embodiment also provides a display screen, which includes a cover plate and a display panel as described above, or a display panel manufactured using the aforementioned display panel manufacturing method, or a display panel controlled using the aforementioned display panel control method. The cover plate is located on the light-emitting side of the display panel and covers the display panel. Specifically, the periphery of the cover plate overlaps with the middle frame and is located on the side of the polarizing layer away from the display panel. The cover plate can improve the strength of the display panel, thereby resisting external scratches, impacts, etc. The cover plate can also isolate the environment, such as preventing water, oxygen, dust, etc. from entering the interior of the display panel. The cover plate can have high light transmittance to ensure display clarity. Exemplarily, the cover plate may include a cover glass (CG).

[0122] In one embodiment, the display screen further includes a polarizing layer. The polarizing layer allows light waves from a specific direction to pass through while blocking light from other directions, thereby forming polarized light. Taking an OLED display panel as an example, a polarizer can be used to prevent external natural light from entering the display panel and being reflected, thereby improving the display effect. The polarizer can be made of any suitable structure and material as needed; this embodiment does not impose any limitations.

[0123] In one embodiment, the display screen does not include a polarizing layer, but instead employs a superimposed color filter and a light-absorbing pixel definition layer 134. Specifically, the color filter can be directly integrated into the encapsulation layer of the light-emitting device on the side away from the substrate. The color filter can replace the filtering function of the polarizer, but only filters out unwanted wavelengths, thereby improving light transmittance. The pixel definition layer 134 can absorb side leakage and ambient reflection from the sub-pixels 100, thereby further enhancing contrast and suppressing light reflection within the display screen. Display screens employing color filter on encapsulation (COE) technology can achieve the same brightness as displays including a polarizing layer with lower power consumption due to enhanced light transmittance.

[0124] In one embodiment, the display screen further includes an optical adhesive layer located between the cover plate and the polarizing layer. The optical adhesive layer is used to bond the cover plate and the polarizing layer to improve the optical performance of the display screen, enhance mechanical stability, and optimize manufacturing processes and appearance. Exemplarily, the material of the optical adhesive layer may include, but is not limited to, optically clear adhesive (OCA) or optically clear resin (OCR).

[0125] This application also provides a display device, including the display screen described above. In this embodiment, based on the aforementioned display screen, a display device with privacy protection function is provided.

[0126] Specifically,Figure 18 This is an internal structural diagram of a display device according to an embodiment. The display device includes a processor, a memory, a communication interface, a display screen, and an input device connected via a system bus. The processor of the display device provides computing and control capabilities. The memory of the display device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage medium. The communication interface of the display device is used for wired or wireless communication with external terminals. Wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. The input device of the display device can be a touch layer covering the display screen, or buttons, a trackball, or a touchpad mounted on the display device casing, or an external keyboard, touchpad, or mouse, etc.

[0127] Those skilled in the art will understand that Figure 18 The structure shown is merely a block diagram of a portion of the structure related to the solution of this application, and does not constitute a limitation on the display device to which the solution of this application is applied. Specific display devices may include those that are more advanced than those described above. Figure 18 The diagram shows more or fewer components, or combinations of certain components, or different component arrangements.

[0128] This application also provides a computer-readable storage medium. One or more non-volatile computer-readable storage media containing computer-executable instructions, which, when executed by one or more processors, cause the processors to perform the steps of a control method for a display panel.

[0129] This application also provides a computer program product containing instructions that, when run on a computer, causes the computer to execute a method for controlling a display panel.

[0130] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0131] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0132] The above embodiments merely illustrate several implementation methods of the embodiments of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the embodiments of this application, and these all fall within the protection scope of the embodiments of this application. Therefore, the protection scope of the patent for the embodiments of this application should be determined by the appended claims.

Claims

1. A display panel, characterized in that, include: substrate; Multiple sub-pixels are located on one side of the substrate, and each sub-pixel includes a light-emitting layer; the multiple sub-pixels include multiple first sub-pixels and multiple second sub-pixels; A light-shielding layer is located on the side of the plurality of sub-pixels away from the substrate. The light-shielding layer is used to block the portion of the emitted light beam of the second sub-pixel from which the angle between the light beam and the positive viewing angle of the display panel is greater than a threshold angle. Wherein, the first light-emitting area of ​​the first sub-pixel is greater than the second light-emitting area of ​​the second sub-pixel, the first light-emitting area is the area of ​​the light-emitting layer of the first sub-pixel, and the second light-emitting area is the area of ​​the light-emitting layer of the second sub-pixel that does not overlap with the light-shielding layer in the thickness direction of the display panel.

2. The display panel according to claim 1, characterized in that, The area of ​​the light-emitting layer of the first sub-pixel is larger than the area of ​​the light-emitting layer of the second sub-pixel.

3. The display panel according to any one of claims 1 to 2, characterized in that, The display panel includes a plurality of first light-emitting units and a plurality of second light-emitting units, wherein the plurality of first light-emitting units include a plurality of adjacent first sub-pixels, and the plurality of second light-emitting units include a plurality of adjacent second sub-pixels; Wherein, a second light-emitting unit is provided between at least two of the first light-emitting units, and / or a first light-emitting unit is provided between at least two of the second light-emitting units.

4. The display panel according to claim 3, characterized in that, The plurality of first light-emitting units are arranged in a plurality of first light-emitting rows, and the plurality of second light-emitting units are arranged in a plurality of second light-emitting rows, wherein the plurality of first light-emitting rows and the plurality of second light-emitting rows are alternately arranged in the column direction; or The plurality of first light-emitting units are arranged into a plurality of first light-emitting columns, and the plurality of second light-emitting units are arranged into a plurality of second light-emitting columns. The plurality of first light-emitting columns and the plurality of second light-emitting columns are alternately arranged in the row direction.

5. The display panel according to claim 3, characterized in that, The first light-emitting unit is adjacent to the second light-emitting unit in both the row and column directions, and the second light-emitting unit is adjacent to the first light-emitting unit in both the row and column directions.

6. The display panel according to claim 4 or 5, characterized in that, The projection of the light-shielding layer in the thickness direction of the display panel is located on at least one side of the second sub-pixel in the row direction and the column direction.

7. The display panel according to any one of claims 1 to 2, characterized in that, The first distance between the light-emitting layers of two adjacent first sub-pixels is less than the second distance between the effective light-emitting areas of two adjacent second sub-pixels; The effective light-emitting area is the region where the light-emitting layer of the second sub-pixel does not overlap with the light-shielding layer in the thickness direction of the display panel.

8. The display panel according to claim 7, characterized in that, The projection of the light-shielding layer in the thickness direction of the display panel is located between the second sub-pixel and an adjacent first sub-pixel, but not between the second sub-pixel and another adjacent first sub-pixel. The third distance between the effective light-emitting area of ​​the second sub-pixel and the light-emitting layer of the first sub-pixel is greater than the fourth distance between the effective light-emitting area of ​​the second sub-pixel and the light-emitting layer of the other first sub-pixel.

9. The display panel according to claim 1, characterized in that, Also includes: An isolation structure is located on the side of the light-shielding layer near the substrate. The isolation structure encloses and forms a plurality of light-emitting openings. The projection of the light-emitting openings in the thickness direction of the display panel coincides with the light-emitting layer of the plurality of sub-pixels. Wherein, the top width of the cross-section at any point of the isolation structure is greater than the bottom width, and the cross-section is perpendicular to the extension direction of the isolation structure at that point.

10. The display panel according to claim 1, characterized in that, The light-shielding layer includes a first light-shielding sub-layer and a second light-shielding sub-layer. The second light-shielding sub-layer is located on the side of the first light-shielding sub-layer away from the substrate. The first light-shielding sub-layer has a plurality of first openings, and the second light-shielding sub-layer has a plurality of second openings. In this configuration, at least a portion of the first opening is correspondingly disposed to the second opening, and the first opening and the corresponding second opening are used to obscure the same first sub-pixel.

11. The display panel according to claim 10, characterized in that, The first opening size of the first opening is larger than the second opening size of the corresponding second opening.

12. The display panel according to claim 1, characterized in that, The threshold angle is greater than or equal to 20° and less than or equal to 45°.

13. A method for manufacturing a display panel, characterized in that, include: Provide substrate; A plurality of sub-pixels are formed on one side of the substrate; the plurality of sub-pixels includes a plurality of first sub-pixels and a plurality of second sub-pixels; A light-shielding layer is formed on the side of the sub-pixel away from the substrate. The light-shielding layer is used to block the portion of the emitted light beam of the second sub-pixel from which the angle between the beam and the positive viewing angle of the display panel is greater than a threshold angle. Wherein, the first light-emitting area of ​​the first sub-pixel is greater than the second light-emitting area of ​​the second sub-pixel, the first light-emitting area is the area of ​​the light-emitting layer of the first sub-pixel, and the second light-emitting area is the area of ​​the light-emitting layer of the second sub-pixel that does not overlap with the light-shielding layer in the thickness direction of the display panel.

14. The method for manufacturing a display panel according to claim 13, characterized in that, The formation of multiple sub-pixels on one side of the substrate includes: An isolation structure is formed on one side of the substrate; the isolation structure encloses and forms a plurality of light-emitting openings, and the top width of the cross-section at any point of the isolation structure is greater than the bottom width, and the cross-section is perpendicular to the extending direction of the isolation structure at that point; A light-emitting material is deposited on the side of the substrate near the isolation structure to form a plurality of sub-pixels; the light-emitting material is broken into two parts at the edge of the isolation structure, the two parts of the light-emitting material including a part falling into the light-emitting opening and another part falling on the top surface of the isolation structure away from the substrate, the light-emitting material located in the light-emitting opening serves as the light-emitting layer of the sub-pixel.

15. A method for controlling a display panel, characterized in that, The method for controlling the display panel as described in any one of claims 1 to 12 includes: Get the current display mode; When the display mode is shared mode, the plurality of first sub-pixels and the plurality of second sub-pixels are controlled to emit light according to the image to be displayed; When the display mode is privacy mode, the plurality of second sub-pixels are controlled to emit light according to the image to be displayed.

16. A display screen, characterized in that, include: The display panel as described in any one of claims 1 to 12, or the display panel prepared by the method of preparing the display panel as described in claims 13 to 14, or the display panel controlled by the method of controlling the display panel as described in claim 15; A cover plate is located on the light-emitting side of the display panel and covers the display panel.

17. A display device, characterized in that, Including the display screen as described in claim 16.

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