Anti-peeping display screen, manufacturing method thereof and electronic equipment

Abstract

The invention provides a peep-proof display screen, a manufacturing method thereof and electronic equipment, and relates to the technical field of electronic products. The peep-proof display screen comprises a display module, a peep-proof module and a touch layer which are sequentially arranged in a stacked mode. The peep-proof module comprises a light absorption part, a plurality of light transmitting parts and a plurality of light filtering parts. A plurality of first openings arranged in an array are defined by the light absorption part, and the first openings are in one-to-one correspondence with the pixel openings of the pixels. The light transmitting parts are arranged in the first openings, and the light filtering parts are arranged corresponding to the first openings. Therefore, small-angle light emitted by each pixel can be normally emitted through the corresponding light transmitting part and the corresponding light filtering part, the light absorbing part can absorb large-angle light emitted by the pixel, and the light filtering part can filter large-angle stray light emitted by other pixels, so that the peep-proof function of the peep-proof display screen is realized. Moreover, the peep-proof module is arranged between the display module and the touch layer, the distance between the peep-proof module and the display module is closer, the peep-proof effect of the peep-proof module is better, and the thickness of the peep-proof module can be reduced.

Description

Technical Field

[0001] This application relates to the field of electronic product technology, and in particular to a privacy screen, a method for manufacturing the same, and an electronic device. Background Technology

[0002] With the development of technology, the privacy and security of electronic consumer products (such as mobile phones and tablets) are receiving increasing attention. In some scenarios, users need the device's screen to have a narrow viewing angle so that others around cannot see the content displayed on the screen, thus requiring the screen to have privacy features.

[0003] In existing technologies, a privacy screen (such as a venetian blind array) can be added to the display screen to filter out light from a wide viewing angle and retain only light from a small angle at a direct viewing angle, so that other people at a wide viewing angle cannot observe the content displayed on the screen.

[0004] However, existing privacy screen protectors are typically quite thick, which hinders the design of thinner electronic products. Furthermore, privacy screen protectors affect screen clarity and limit their application scenarios. Summary of the Invention

[0005] This application provides a privacy screen and its manufacturing method, as well as an electronic device. The privacy screen can achieve privacy protection, and is thin and clear, which is conducive to the thinning and lightening of electronic devices and expands the application scenarios.

[0006] A first aspect of this application provides a privacy display screen, comprising: a display module including a plurality of pixels arranged in an array; a privacy module stacked on the display module; and a touch layer stacked on the privacy module; wherein the privacy module includes: a light-absorbing portion stacked on the display module for absorbing light emitted by each pixel; the light-absorbing portions forming a plurality of first openings arranged in an array, each first opening facing the pixel opening of each pixel; a plurality of light-transmitting portions disposed within each first opening; and a plurality of light-filtering portions, each light-filtering portion disposed corresponding to each first opening, and the color of each light-filtering portion being the same as the color of the corresponding pixel.

[0007] The privacy display screen provided in this application includes a display module, a privacy module, and a touch layer stacked sequentially. The privacy module includes a light-absorbing part, several light-transmitting parts, and several light-filtering parts. By stacking light-absorbing parts on the display module, the light-absorbing parts form several arrayed first openings, each first opening corresponding one-to-one with the pixel opening of each pixel in the display module. Each light-transmitting part is placed within its respective first opening, and each light-filtering part is positioned corresponding to its respective first opening, ensuring that the color of each light-filtering part matches the color of its corresponding pixel. Thus, the light-absorbing parts surround the outer periphery above each pixel opening, without obstructing the pixel opening, and each light-transmitting part and each light-filtering part is located directly above each pixel opening. Small-angle light emitted from each pixel can pass through the corresponding light-transmitting and filtering parts and exit normally, while the light-absorbing parts can absorb large-angle light emitted from the pixels, and the filtering parts can also filter out large-angle stray light emitted from other pixels, thereby achieving the privacy function of the privacy display screen. Furthermore, by placing the privacy module between the display module and the touch layer, the privacy module is closer to the display module, resulting in better privacy protection. This also helps reduce the thickness of the privacy module and the overall thickness of the privacy display, contributing to the thinner and lighter design of electronic devices. In addition, the privacy module has a simple manufacturing process, high production efficiency, adjustable viewing angle, and wider range of applications.

[0008] In one possible implementation, the orthographic projection of the first opening onto the display module completely coincides with the pixel opening.

[0009] In this way, the shape and area of ​​the first opening formed by the light-absorbing part are consistent with the shape and area of ​​the pixel opening. The light-absorbing part has a good light-blocking effect on the pixel, which enables the privacy screen to maintain a small angle of light emission and enhances the privacy effect of the privacy screen.

[0010] In one possible implementation, the light-absorbing part is a low-refractive-index part, and the light-transmitting part is a high-refractive-index part, with the refractive index of the light-transmitting part being higher than that of the light-absorbing part.

[0011] In this way, when large-angle light emitted from a pixel propagates from the light-transmitting part to the light-absorbing part, total internal reflection occurs at the interface between the two parts. The large-angle light is reflected back into the light-transmitting part and propagates along it to the corresponding light-filtering part, before being emitted outwards through the filter. This improves the luminous efficiency of the pixels and enhances the brightness of the privacy screen when viewed directly.

[0012] In one possible implementation, the light-transmitting portion completely fills the first opening, and a plurality of light-filtering portions are disposed within a filter layer on the light-transmitting portion.

[0013] In this way, the small-angle light emitted by the pixel passes through the light-transmitting part and illuminates the corresponding light-filtering part, and then passes through the light-filtering part and is emitted outward.

[0014] In one possible implementation, a light filter is also disposed within the first opening, and the light filter and the light-transmitting part are stacked.

[0015] In one possible implementation, the light-transmitting portion is stacked on top of the light-filtering portion.

[0016] In this way, the light-transmitting portion forms at least part of the upper surface of the light-absorbing layer. The transparent organic resin used to make the light-transmitting portion has excellent leveling properties, which improves the smoothness of the upper surface of the light-absorbing layer, facilitating the formation of other structural layers on the light-absorbing layer. Furthermore, when the light-transmitting portion is made of a high-refractive-index transparent organic resin, large-angle light rays, after reflection at the interface between the light-transmitting and light-absorbing portions, are more easily emitted upwards from the light-transmitting portion and do not propagate into the light-absorbing portion on the other side. This reduces pixel light emission loss, improves pixel luminous efficiency, and increases the front-view brightness of the privacy screen.

[0017] In one possible implementation, the thickness of the filter portion is the same as the thickness of the light-transmitting portion.

[0018] In one possible implementation, the privacy module further includes: a hydrophobic portion, stacked on the light-absorbing portion, forming a plurality of second openings arranged in an array, each second opening being directly opposite the pixel opening of each pixel.

[0019] Because the hydrophobic part is made of a hydrophobic inorganic material, it facilitates the flow of materials from the filter and light-transmitting parts into the first opening, thus promoting the formation of the filter and light-transmitting parts and improving their manufacturing efficiency. Furthermore, the hydrophobic part's blocking and protective effect on the light-absorbing part below it prevents over-etching of the light-absorbing part and helps to remove residues within the first opening, resulting in a purer color for the filter part.

[0020] In one possible implementation, the sidewall of the light-absorbing part that forms the first opening is an arc-shaped sidewall.

[0021] The hydrophobic portion modifies the etching interface of each first opening formed in the light-absorbing portion. By adjusting the content of the etching gas, the sidewall of the first opening can be formed into an arc-shaped sidewall. This increases the contact area between the light-absorbing portion and the light-filtering and light-transmitting portions located within the first opening, enhancing the light extraction effect of the privacy screen.

[0022] In one possible implementation, the optical density of the light-absorbing portion is greater than 0.6.

[0023] In this way, the light-absorbing part has a higher optical density value, enabling it to absorb more energy. The light-absorbing part has good light absorption performance, which can improve the privacy protection effect of the privacy module.

[0024] In one possible implementation, the optical density of the light-absorbing section is 1.0-1.5.

[0025] In one possible implementation, the thickness of the light-absorbing portion is 1.5 μm-12 μm.

[0026] In this way, while ensuring the light absorption effect of the light-absorbing part, the thickness of the light-absorbing part is small, and the overall thickness of the privacy module is small.

[0027] In one possible implementation, the thickness of the light-absorbing portion is 2.5 μm to 6.0 μm.

[0028] In one possible implementation, the display module includes: a substrate; a driving layer stacked on the substrate; an OLED device layer stacked on the driving layer; and an encapsulation layer stacked on the OLED device layer.

[0029] In this way, the substrate serves as the basic support layer for the display module, with the driving layer, OLED device layer, and encapsulation layer stacked sequentially on it. The substrate ensures the structural strength of the display module and prevents moisture, dust, and other foreign matter from entering the driving layer and OLED device layer. The driving layer controls the operation of the OLED device layer, where each pixel in the array emits light to achieve the display function. The encapsulation layer isolates the display module from moisture and oxygen in the external environment, extending its lifespan.

[0030] A second aspect of this application provides a method for manufacturing a privacy display screen, comprising: forming a display module; forming a privacy module on the display module; forming a touch layer on the privacy module; wherein forming the privacy module comprises: depositing a light-absorbing layer on the display module; etching the light-absorbing layer to form a light-absorbing portion having a plurality of arrayed first openings; depositing a plurality of light-transmitting portions and a plurality of light-filtering portions, such that each light-transmitting portion is located within each of the first openings, and each light-filtering portion is disposed corresponding to each of the first openings, and the color of each light-filtering portion is the same as the color of the corresponding pixel.

[0031] The method for manufacturing a privacy display screen provided in this application involves depositing a light-absorbing layer on a display module and etching a plurality of arrayed first openings in the light-absorbing layer using photolithography, such that each first opening corresponds one-to-one with the pixel opening of each pixel in the display module, thus forming a light-absorbing portion. Light-transmitting portions are then deposited within each of the first openings of the light-absorbing portions, and a plurality of light-filtering portions are deposited corresponding one-to-one with each first opening. In this way, the light-absorbing portions surround the outer periphery above each pixel opening, without obstructing the pixel opening, while each light-transmitting portion and each light-filtering portion is located directly above each pixel opening. Small-angle light emitted from each pixel can pass through the corresponding light-transmitting and filtering portions and be emitted normally, while the light-absorbing portions can absorb large-angle light emitted from the pixels, and the filtering portions can also filter out large-angle stray light emitted from other pixels, thereby achieving the privacy function of the privacy display screen. Furthermore, by placing the privacy module between the display module and the touch layer, the privacy module is closer to the display module, resulting in better privacy protection. This also helps reduce the thickness of the privacy module and the overall thickness of the privacy display, contributing to the thinner and lighter design of electronic devices. In addition, the privacy module has a simple manufacturing process, high production efficiency, adjustable viewing angle, and wider range of applications.

[0032] In one possible implementation, the deposition of a plurality of light-transmitting portions and a plurality of light-filtering portions includes: depositing and forming each light-transmitting portion within each first opening; and depositing and forming each light-filtering portion on each light-transmitting portion such that each light-filtering portion is located within a filter layer.

[0033] In one possible implementation, depositing a plurality of light-transmitting portions and a plurality of light-filtering portions includes: depositing each light-filtering portion and each light-transmitting portion in each first opening, so that the light-filtering portions and light-transmitting portions are stacked.

[0034] In one possible implementation, the deposition of a plurality of light-transmitting portions and a plurality of light-filtering portions includes: depositing and forming each light-filtering portion within each first opening; and depositing and forming each light-transmitting portion on each light-filtering portion.

[0035] In one possible implementation, after forming the light-absorbing layer, the method further includes: depositing a hydrophobic layer on the light-absorbing layer; etching the hydrophobic layer and the light-absorbing layer at one time, so that the hydrophobic layer is formed into a hydrophobic portion having a plurality of arrayed second openings, and the light-absorbing layer is formed into a light-absorbing portion.

[0036] In this way, even if a hydrophobic portion is added to the light-absorbing part of the privacy module, it will not require additional photolithography steps. Both the hydrophobic and light-absorbing portions can be formed simultaneously in a single photolithography process. Consequently, the manufacturing process of the privacy module is simple and efficient, saving on manufacturing costs.

[0037] A third aspect of this application provides an electronic device including a housing and a privacy display screen as described above, the privacy display screen being mounted on the housing.

[0038] The electronic device provided in this application includes a housing and a privacy display screen mounted on the housing. The privacy display screen includes a display module, a privacy module, and a touch layer stacked sequentially. The privacy module includes a light-absorbing part, several light-transmitting parts, and several light-filtering parts. By stacking light-absorbing parts on the display module, the light-absorbing parts form several arrayed first openings, each first opening corresponding one-to-one with the pixel opening of each pixel in the display module. Each light-transmitting part is placed within its respective first opening, and each light-filtering part is positioned corresponding to its respective first opening, ensuring that the color of each light-filtering part matches the color of its corresponding pixel. Thus, the light-absorbing parts surround the outer periphery above each pixel opening, without obstructing the pixel opening, and each light-transmitting part and each light-filtering part is located directly above each pixel opening. Small-angle light emitted from each pixel can pass through the corresponding light-transmitting and filtering parts and exit normally, while the light-absorbing parts can absorb large-angle light emitted from the pixels, and the filtering parts can also filter out large-angle stray light emitted from other pixels, thereby achieving the privacy function of the privacy display screen. Furthermore, by placing the privacy module between the display module and the touch layer, the privacy module is closer to the display module, resulting in better privacy protection. This also helps reduce the thickness of the privacy module and the overall thickness of the privacy display, contributing to the thinner and lighter design of electronic devices. In addition, the privacy module has a simple manufacturing process, high production efficiency, adjustable viewing angle, and wider range of applications. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application;

[0040] Figure 2 for Figure 1 The exploded structure diagram of the electronic device shown;

[0041] Figure 3 This is a schematic diagram of the structure of the LAF membrane in the related technology;

[0042] Figure 4 This is a schematic diagram of the structure of a privacy display screen provided in an embodiment of this application;

[0043] Figure 5 This is a schematic diagram of another privacy display screen provided in an embodiment of this application;

[0044] Figure 6 This is a schematic diagram of the structure of a third privacy screen provided in an embodiment of this application;

[0045] Figure 7 This is a schematic diagram of the structure of the fourth privacy screen provided in the embodiments of this application;

[0046] Figure 8 A flowchart illustrating the steps of a method for manufacturing a privacy display screen provided in an embodiment of this application;

[0047] Figure 9 A flowchart illustrating the steps for forming a privacy module as provided in this application embodiment.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1-Electronic devices;

[0050] 100 - Display screen; 100a - Privacy screen;

[0051] 110 - Display module; 120 - Privacy module; 130 - Touch layer; 140 - Optical adhesive layer; 150 - Cover plate;

[0052] 111-Substrate; 112-Driving layer; 113-OLED device layer; 114-Encapsulation layer; 121-Light-absorbing part; 122-Light-transmitting part; 123-Light-filtering part; 124-Hydrophobic part;

[0053] 1131 - Pixel; 1201 - Light-absorbing layer; 1202 - Light-filtering layer; 1203 - Planarization layer; 1211 - First opening; 1241 - Second opening;

[0054] 1131a - Red pixel; 1131b - Green pixel; 1131c - Blue pixel;

[0055] 200 - Housing;

[0056] 210 - Mid-frame; 220 - Back cover. Detailed Implementation

[0057] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0058] This application provides an electronic device, which can be a consumer electronics product. Exemplary examples include, but are not limited to, mobile phones, portable Android devices (PADs), laptops, laptop computers, netbooks, ultra-mobile personal computers (UMPCs), walkie-talkies, point-of-sale (POS) machines, personal digital assistants (PDAs), multimedia players, e-book readers, in-vehicle devices, wearable devices, virtual reality (VR) devices, and augmented reality (AR) devices. Wearable devices include, but are not limited to, smart bracelets, smartwatches, smart head-mounted displays, and smart glasses.

[0059] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. (Refer to...) Figure 1 As shown, taking a mobile phone as an example, electronic device 1 may include a display screen 100 and a housing 200. One side surface of the display screen 100 is used to display images, text, and other information; this side surface is typically defined as its front, and the opposite side surface is its back. The housing 200 surrounds the periphery and back of the display screen 100, supporting and securing it, and providing protection. The front of the display screen 100 is exposed outside the housing 200, allowing the user to view the content displayed on the display screen 100 or perform input operations on the electronic device 1.

[0060] Figure 2 for Figure 1 The diagram shows the exploded structure of the electronic device. (Refer to...) Figure 2 As shown, the housing 200 of the electronic device 1 may include a middle frame 210 and a back cover 220. The middle frame 210 is connected between the display screen 100 and the back cover 220. The display screen 100 is supported on one side surface of the middle frame 210, and the back cover 220 is connected to the other side surface of the middle frame 210.

[0061] The display screen 100 is typically mounted integrally on the mid-frame 210 to ensure its strength and stability, and to meet its usage requirements. The back cover 220 is usually connected to the mid-frame 210 by overlapping. The mid-frame 210 and the back cover 220 together form a receiving cavity, which is used to install circuit boards, batteries, cameras, microphones (the circuit boards, batteries, cameras, and microphones are not shown in the figure).

[0062] It should be noted that Figure 1 and Figure 2 The electronic device 1 shown is a candybar-type electronic device, specifically a candybar mobile phone. In other embodiments, the electronic device 1 can also be a foldable electronic device, for example, a foldable mobile phone.

[0063] When electronic device 1 is a foldable electronic device, the display screen 100 mounted on electronic device 1 is a foldable display screen 100. In this case, the display screen 100 can be made of flexible material; in other words, the display screen 100 is a flexible screen. This allows the display screen 100 to have the ability to bend and deform, enabling the display screen 100 to switch between a folded state and an unfolded state.

[0064] Regardless of whether it is a candybar or foldable electronic device, in the application of electronic device 1, in some scenarios, such as processing private information, handling work involving trade secrets, entering account passwords, etc., users want the information displayed by electronic device 1 to be unknowable to other users around them. In this case, electronic device 1 needs to have a privacy protection function.

[0065] To enable the display screen 100 of electronic device 1 to have a privacy function, related technologies include applying a privacy film to the display screen 100 of electronic device 1. The privacy film adjusts the light emission angle of the display screen 100 to achieve the privacy effect. Currently, the most commonly used privacy film on the market is the Louver Array Film (LAF).

[0066] Figure 3 This is a schematic diagram of the structure of a LAF membrane in related technologies. (Refer to...) Figure 3 As shown, the core structural layer of the LAF film 10 is the privacy layer 11. Multiple prisms 11a are arranged on the privacy layer 11, with a very small spacing between adjacent prisms 11a (similar to a venetian blind structure). Therefore, only light within a small angle range, such as the 50° range shown in the figure, can pass through, achieving a privacy effect. In addition, to support and protect the privacy layer 11, support layers 12 are provided on both sides of the privacy layer 11. The material constituting the support layer 12 is, for example, polyethylene terephthalate (PET). Protective layers 13 are also provided on both sides of the support layer 12, and the material constituting the protective layer 13 is, for example, polyethylene (PE). A hardening layer 14 can also be provided between the support layer 12 and the protective layer 13 on the light-emitting side of the privacy layer 11 to enhance the strength of the LAF film 10. An adhesive layer (not shown in the figure) can be provided between adjacent film layers in the LAF film 10 to bond the film layers together sequentially.

[0067] However, due to the presence of protective layers 13 and adhesive layers in the LAF film 10, the LAF film 10 is relatively thick, typically around 200μm-400μm. Therefore, the LAF film 10 increases the thickness of the display screen 100, making it unsuitable for use in thin electronic devices 1 and increasing production costs. Furthermore, the privacy layer 11 in the LAF film 10, which controls the viewing angle, has a complex structure, and current technology cannot directly apply it to the display screen 100 of thin products. Additionally, the numerous layers in the LAF film 10 affect the light transmittance of the display screen 100; increasing the brightness of the display screen 100 would increase the power consumption of the electronic device 1.

[0068] In view of this, the present application embodiment improves the display screen 100 mounted on the electronic device 1 by setting the display screen 100 as a privacy display screen. The privacy display screen includes a display module, a privacy module, and a touch layer stacked sequentially. The privacy module includes a light-absorbing part, a plurality of light-transmitting parts, and a plurality of light-filtering parts. By stacking light-absorbing parts on the display module, the light-absorbing parts form a plurality of arrayed first openings, each first opening corresponding one-to-one with the pixel opening of each pixel in the display module. Each light-transmitting part is disposed within each first opening, and each light-filtering part is disposed corresponding to each first opening, so that the color of each light-filtering part is consistent with the color of the corresponding pixel. In this way, the light-absorbing parts are disposed on the outer periphery above each pixel opening, without obstructing the pixel opening, and each light-transmitting part and each light-filtering part is located directly above each pixel opening. Small-angle light emitted from each pixel can pass through the corresponding light-transmitting part and the light-filtering part and be emitted normally, while the light-absorbing part can absorb large-angle light emitted from the pixel, and the light-filtering part can also filter out large-angle stray light emitted from other pixels, thereby realizing the privacy function of the privacy display screen. Furthermore, by placing the privacy module between the display module and the touch layer, the privacy module is closer to the display module, resulting in better privacy protection. This also helps reduce the thickness of the privacy module and the overall thickness of the privacy display, contributing to the thinner and lighter design of electronic devices. In addition, the privacy module has a simple manufacturing process, high production efficiency, adjustable viewing angle, and wider range of applications.

[0069] Figure 4 This is a schematic diagram of a privacy display screen provided in an embodiment of this application. (Refer to...) Figure 4 As shown, the privacy display screen 100a provided in this embodiment includes a display module 110, a privacy module 120, and a touch layer 130. The privacy module 120 and the touch layer 130 are sequentially stacked on the display module 110. The display module 110, as a basic component of the privacy display screen 100a, is used to realize the display function of the privacy display screen 100a. The privacy module 120 is used to realize the privacy function of the privacy display screen 100a. The touch layer 130 is used to realize the touch function of the privacy display screen 100a.

[0070] It is understood that the privacy display 100a shown in the figure is an OLED (Organic Light-Emitting Diode) display. That is to say, the display module 110 mounted on the privacy display 100a is an OLED display module. When the display module 110 is an OLED display module, the display module 110 may include a substrate 111, a driving layer 112, an OLED device layer 113, and an encapsulation layer 114. The substrate 111 is located at the bottom layer of the display module 110, and the driving layer 112, the OLED device layer 113, and the encapsulation layer 114 are sequentially stacked on the substrate 111.

[0071] The substrate 111 serves as the basic support layer for the display module 110, primarily supporting the structural layers stacked upon it and ensuring the overall structural strength and stability of the privacy display screen 100a. During the fabrication of the display module 110, the substrate 111 acts as the foundation for the formation of other structural layers, which can be sequentially formed on top of it. The substrate 111 has a certain thickness, and its structural strength meets the requirements. Furthermore, the substrate 111 provides excellent barrier properties against moisture, dust, and other foreign matter from the environment.

[0072] When the privacy screen 100a is a rigid screen, the substrate 111 of the display module 110 can be made of a rigid material. For example, the substrate 111 can be made of quartz, glass, resin, metal, etc., among which resin includes, but is not limited to, poly(methyl methacrylate) (PMMA), polyethylene terephthalate (PET), polyethylene naphthalate (PBN), polycarbonate (PC), etc.

[0073] When the privacy screen 100a is a flexible screen, the substrate 111 of the display module 110 can be made of a flexible material. For example, the substrate 111 can be made of polyimide (PI). In this case, when manufacturing the display module 110, a rigid substrate can be provided as a support structure, the flexible substrate 111 can be attached to the rigid substrate, and then the various structural layers can be formed on the substrate 111. Afterwards, the substrate 111 can be peeled off from the rigid substrate.

[0074] The driving layer 112 may contain several thin film transistors (TFTs) (not shown in the figure), which are used to control the operation of the OLED device layer 113.

[0075] The OLED device layer 113 has a plurality of pixels 1131 arranged in an array. These pixels 1131 may include, for example, red pixels 1131a, green pixels 1131b, and blue pixels 1131c. The red pixels 1131a, green pixels 1131b, and blue pixels 1131c can be arranged sequentially, and every three adjacent red pixels 1131a, green pixels 1131b, and blue pixels 1131c can form a pixel unit 1131.

[0076] Each pixel 1131 is electrically connected to a thin-film transistor (TFT). The voltage applied to each pixel 1131 is controlled by the TFT to control the luminous flux of the pixel 1131. By controlling the luminous flux of different colored pixels 1131 in each pixel unit, the emission ratio of different colored pixels 1131 in each pixel unit is controlled, and the color of each pixel unit is adjusted to achieve the function of displaying images, text, and other information on the privacy display screen 100a.

[0077] The OLED device layer 113 may include a pixel 1131 definition layer and several OLED devices (not shown in the figure). The pixel 1131 definition layer defines the position, shape, and size of the pixels 1131. The pixel 1131 definition layer may be, for example, a mesh structure, forming multiple pixel openings arranged in an array. Each OLED device is located within its respective pixel opening enclosed by the pixel 1131 definition layer, which surrounds the periphery of each OLED device. The OLED devices are, for example, arranged in an array on the substrate 111. Thin-film transistors are connected to each OLED device, controlling the light emitted by each OLED device to form each pixel 1131.

[0078] Understandable, Figure 4 In the following figures, only the portion of each pixel 1131 located within the pixel opening is shown, and the complete structure of the OLED device layer 113 is not shown.

[0079] An encapsulation layer 114 is stacked on the OLED device layer 113. The encapsulation layer 114 is used to isolate moisture and oxygen from the external environment, preventing water / oxygen from penetrating into the OLED device and affecting its lifespan. The encapsulation layer 114 can be implemented using an alternating inorganic / organic thin-film structure. The main function of the inorganic layer is to block water and oxygen, preventing moisture or oxygen from entering the OLED device and causing the pixel 1131 to dim. The organic layer is typically thicker, which helps to flatten the surface of the display module 110 and can encapsulate contaminant particles introduced during the film forming process. Furthermore, for flexible screens, the organic layer can also alleviate stress on adjacent inorganic layers when the privacy display 100a is bent.

[0080] In other embodiments, the privacy display 100a may also be a liquid crystal display (LCD). That is, the display module 110 mounted on the privacy display 100a is an LCD display module. In this case, the privacy display 100a may also include a backlight module, with the backlight module and the display module 110 stacked sequentially on the substrate 111. The backlight module is used to provide sufficient and uniformly distributed light to the display module 110. The light shines on the display module 110 to enable the display module 110 to display images, text, and other information.

[0081] The following explanation will use the privacy display 100a as an OLED display and the display module 110 mounted on the privacy display 100a as an OLED display module as an example.

[0082] The privacy module 120, stacked on the display module 110, is used to adjust the light emission angle range of each pixel 1131 in the display module 110. For example, the privacy module 120 can control the light emission angle range of each pixel 1131 between -60° and 60°. Here, the light emission angle completely perpendicular to the privacy display screen 100a is defined as 0°, and the sign of the light emission angle depends on the direction of light emission. Using the light emission angle perpendicular to the privacy display screen 100a as a reference, a light beam tilted 60° to the left (or upward) can be defined as -60°, and a light beam tilted 60° to the right (or downward) can be defined as 60°. In this way, the content displayed on the privacy display screen 100a can only be seen within a small viewing angle range (e.g., -60° to 60°), and the content displayed on the privacy display screen 100a cannot be observed from the side of the electronic device, thus achieving the privacy function of the privacy display screen 100a.

[0083] Metal wires may be arranged in the touch layer 130 stacked on the privacy module 120, and these metal wires can be electrically connected to the screen circuit board of the privacy display 100a. When a user touches the privacy display 100a, the touch layer 130 generates a touch signal, which is transmitted to the controller of the electronic device via the screen circuit board. When the controller receives the touch signal, it detects the user's touch position on the privacy display 100a, inputs a signal according to the touch position, and realizes the touch operation of the electronic device.

[0084] Among them, reference Figure 4 As shown, the privacy module 120 includes a light-absorbing portion 121, which is stacked on the encapsulation layer 114 of the display module 110. The light-absorbing portion 121 can have a mesh structure, forming a plurality of first openings 1211. These first openings 1211 are arranged in an array, with each first opening 1211 corresponding to the pixel opening of each pixel 1131. In other words, the light-absorbing portion 121 exposes the pixel opening of each pixel 1131, and the light-absorbing portion 121 surrounds the outer periphery above the pixel opening of each pixel 1131. For a certain pixel 1131, the light-absorbing portion 121 surrounding the periphery of that pixel 1131 can absorb the light emitted by that pixel 1131.

[0085] The small-angle light emitted by pixel 1131 ( Figure 4As shown by the solid arrow in the diagram, for example, light with an angle in the range of -60° to 60° can be emitted from the first opening 1211 of the light-absorbing part 121. Users at a small viewing angle (e.g., the angle between the viewing angle and the perpendicular to the privacy display 100a ≤ ±60°) can receive small-angle light emitted by pixel 1131. Meanwhile, large-angle light emitted by pixel 1131 (…) Figure 4 As shown by the dashed arrow in the diagram, for example, light rays with an angle greater than ±60° are transmitted to the light-absorbing unit 121 and absorbed by it. Others at a large viewing angle (e.g., the angle between the viewing angle and the perpendicular of the privacy display 100a is greater than ±60°) cannot receive the large-angle light rays emitted by the pixel 1131.

[0086] Taking red pixel 1131a as an example, the light-absorbing portion 121 surrounding red pixel 1131a can absorb the red light emitted by red pixel 1131a. In other words, the light-absorbing portion 121 surrounding red pixel 1131a cannot transmit red light. Small-angle red light emitted by red pixel 1131a is emitted through the corresponding first opening 1211 on the light-absorbing portion 121, and can be received by a user at a small viewing angle. However, large-angle red light emitted by red pixel 1131a is directed towards the light-absorbing portion 121 surrounding it, and is absorbed by the light-absorbing portion 121, preventing other users at a large viewing angle from receiving the red light.

[0087] Therefore, by providing a privacy module 120 on the display module 110, small-angle light emitted by the pixel 1131 can pass through the first opening 1211 formed by the light-absorbing part 121 and be emitted, while large-angle light emitted by the pixel 1131 is transmitted to the light-absorbing part 121 and absorbed by it. Thus, the content displayed on the privacy display screen 100a is visible to users at a narrow viewing angle, but not to others at a wide viewing angle, thereby achieving the privacy function of the privacy display screen 100a.

[0088] The privacy module 120 also includes a plurality of light-transmitting portions 122, which are disposed on the same layer as the light-absorbing portions 121, and each light-transmitting portion 122 is disposed within each first opening 1211 formed by the light-absorbing portions 121. For ease of explanation, in this embodiment, the structural layer in which the light-absorbing portions 121 are located is defined as the light-absorbing layer 1201, and the plurality of light-transmitting portions 122 are also located within the light-absorbing layer 1201, and each light-transmitting portion 122 fills within each first opening 1211 formed by the light-absorbing portions 121. Each light-transmitting portion 122 is correspondingly disposed directly above the pixel opening of each pixel 1131, and small-angle light emitted by each pixel 1131 can pass through the light-transmitting portion 122 and be emitted.

[0089] The light-transmitting portion 122 occupies at least a portion of the thickness space of the light-absorbing portion 121, so as to fill at least a portion of the depth of the first opening 1211 through the light-transmitting portion 122. While ensuring that the light-transmitting portion 122 can normally transmit small-angle light emitted by the pixel 1131, the light-transmitting portion 122 fills the first opening 1211 formed by the light-absorbing portion 121 to form a complete light-absorbing layer 1201, so as to facilitate the formation of other structural layers on the light-absorbing layer 1201.

[0090] The privacy module 120 also includes a plurality of light-filtering sections 123, each light-filtering section 123 being disposed corresponding to each first opening 1211 formed by the light-absorbing section 121. That is, each light-filtering section 123 can be disposed directly above the pixel opening of each pixel 1131. Furthermore, the extension of the corresponding light-filtering section 123 can be set according to the color of each pixel 1131 so that the color of each light-filtering section 123 is consistent with the color of the corresponding pixel 1131.

[0091] By adding several light-filtering sections 123 to the privacy module 120, and placing a light-filtering section 123 of the same color above the pixel opening of each pixel 1131, the privacy display 100a can achieve the following: Firstly, when ambient light enters the privacy display 100a, the light-filtering section 123 above each pixel 1131 can absorb light of other colors. Combined with the light-absorbing effect of the light-absorbing section 121 surrounding the pixel opening of each pixel 1131, the reflectivity of the privacy display 100a can be reduced, thus improving its contrast. Secondly, when large-angle light emitted from pixels 1131 of other colors is transmitted to the light-filtering section 123 above that pixel 1131, the light-filtering section 123 can absorb the large-angle light, thus preventing light crosstalk and leakage.

[0092] Continue to refer to Figure 4 As shown, in the privacy display screen 100a of this embodiment, an optical adhesive layer 140 and a cover plate 150 are also provided on the touch layer 130. The optical adhesive layer 140 and the cover plate 150 can be stacked on the touch layer 130 in sequence.

[0093] The cover plate 150 is located on the outer surface of the entire privacy display 100a, protecting the touch layer 130, privacy module 120, and display module 110 beneath it. The cover plate 150 prevents moisture, dust, and other impurities from the external environment from entering the privacy display 100a, thus avoiding damage to the metal wires in the touch layer 130 and the OLED devices in the display module 110. Furthermore, the cover plate 150 enhances the overall structural strength of the privacy display 100a, ensuring its reliability.

[0094] The optical adhesive layer 140 is used to bond the cover plate 150 to the touch layer 130, ensuring the connection strength between the cover plate 150 and the touch layer 130, and guaranteeing the integrity and reliability of the privacy display 100a. Furthermore, the optical adhesive (OCA) has high light transmittance and will not affect the light transmittance of the privacy display 100a.

[0095] It is understandable that traditional OLED displays typically have a circular polarizer underneath the cover plate 150, for example, the circular polarizer can be placed between the optical adhesive layer 140 and the cover plate 150. This circular polarizer helps address the reflection of ambient light by the OLED display, improving its contrast in bright environments. However, in this embodiment, a filter 123 is added to the privacy module 120. The filter 123 can solve the reflection problem of the privacy display 100a, thus improving its contrast. Therefore, the privacy display 100a in this embodiment does not require a circular polarizer, reducing its overall thickness and contributing to the thinner and lighter design of electronic devices.

[0096] In this embodiment, by providing a privacy module 120 in the privacy display 100a, the light-absorbing portion 121 in the privacy module 120 can absorb the large-angle light emitted by the pixel 1131, thereby achieving the privacy function of the privacy display 100a. Simultaneously, by filling each light-transmitting portion 122 within each first opening 1211 formed by the light-absorbing portion 121, each light-transmitting portion 122 does not affect the propagation of the small-angle light emitted by the pixel 1131, and can enhance the flatness of the light-absorbing layer 1201 where the light-absorbing portion 121 is located. No further planarization processing is required for the light-absorbing portion 121, simplifying the manufacturing process of the privacy module 120 and helping to reduce the thickness of the privacy module 120. Furthermore, by adding several light-filtering portions 123 to the privacy module 120, it can also prevent light crosstalk and leakage, further enhancing the privacy effect of the privacy display 100a. The filter unit 123 can also reduce the reflectivity of the privacy display screen 100a and improve its contrast. In addition, by adding the filter unit 123, the circular polarizer can be eliminated, thereby reducing the overall thickness of the privacy display screen 100a.

[0097] Based on this, this embodiment places the privacy module 120 between the display module 110 and the touch layer 130, making the privacy module 120 very close to the pixels 1131 in the display module 110. The light-absorbing part 121 in the privacy module 120 has a better blocking effect on the large-angle light emitted by the pixels 1131, allowing the large-angle light to be absorbed as completely as possible by the light-absorbing part 121, thereby improving the privacy effect of the privacy display screen 100a. With the combined cooperation of the light-absorbing part 121 and the light-filtering part 123, the privacy module 120 not only has a good privacy effect, but its thickness can also be further reduced. Therefore, the overall thickness of the privacy display screen 100a can be further reduced, improving the thinness and lightness of the electronic device.

[0098] Furthermore, if the privacy module 120 is placed above the touch layer 130, the light emitted by the pixel 1131 must first pass through the touch layer 130 before reaching the privacy module 120. The metal wires in the touch layer 130 can cause crosstalk to the light, potentially altering its propagation path. This, in turn, affects the light's transmission path within the privacy module 120, weakening its privacy protection effect. In this embodiment, however, by placing the privacy module 120 between the display module 110 and the touch layer 130, the light emitted by the pixel 1131 first passes through the privacy module 120 before propagating to the touch layer 130 located above it. The privacy module 120 directly absorbs and filters the light emitted by the pixel 1131, without being affected by other interferences. This results in higher collimation and a better privacy protection effect.

[0099] Therefore, the privacy module 120 of this embodiment has a small thickness and strong privacy protection capability, which can reduce the overall thickness of the privacy display screen 100a and improve the privacy protection effect of the privacy display screen 100a. The privacy display screen 100a provided in this embodiment has a privacy protection capability of less than 0.3.

[0100] To limit the light emission range of the privacy display 100a to a small angle, the opening area of ​​each first opening 1211 formed by the light-absorbing part 121 cannot be too large. The first opening 1211 can be matched and set according to the pixel opening of the pixel 1131. Specifically, the shape of the first opening 1211 can be approximately the same as the shape of the pixel opening of the pixel 1131, and the opening area of ​​the first opening 1211 can also be approximately the same as the opening area of ​​the pixel opening of the pixel 1131. In this way, the light-absorbing part 121 has a good light-blocking effect on the pixel 1131, enabling the privacy display 100a to maintain a small angle of light emission and enhancing the privacy protection effect of the privacy display 100a.

[0101] Regarding the specific arrangement of the light-absorbing part 121, in some embodiments, the entire light-absorbing part 121 can be made of a light-shielding material. For example, the entire light-absorbing part 121 can be made of a black organic material, and the refractive index of the light-absorbing part 121 can be between 1.4 and 1.5. With this arrangement, the light-absorbing part 121 can absorb light of all colors. For example, the light-absorbing part 121 can absorb red light emitted by red pixel 1131a, green light emitted by green pixel 1131b, and blue light emitted by blue pixel 1131c.

[0102] At this time, an integral light-absorbing part 121 can be set for pixels 1131 of different colors. For each pixel 1131 arranged in the array, the light-absorbing part 121 can be a mesh-like integral structure. For example, the light-absorbing part 121 can be a black matrix (BM), and the materials used to make the black matrix can include photosensitive resin, pigment, solvent, and other components.

[0103] In other embodiments, the light-absorbing portion 121 may also be made of a filter material of a different color than the corresponding pixel 1131. The light-absorbing portion 121 may include a plurality of filters surrounding the upper periphery of each pixel 1131. In this way, when large-angle light emitted by the pixel 1131 is transmitted to the corresponding filter, the filter cannot transmit these light rays, but absorbs the large-angle light emitted by the pixel 1131, thereby realizing the privacy function of the privacy display 100a. Taking the red pixel 1131a as an example, the filter surrounding the upper periphery of the red pixel 1131a may be a light-absorbing portion 121 of a color other than red. For example, the filter surrounding the red pixel 1131a may be a green filter or a blue filter.

[0104] At this time, the colors of the filters surrounding the pixels 1131 of different colors are often different. For a privacy display 100a that includes multiple arrays of pixels 1131, the light-absorbing part 121 in the privacy display 100a can be composed of multiple arrays of filters of different colors.

[0105] The following explanation will be based on the example of the light-absorbing part 121 being made of light-shielding material and having an integral mesh structure.

[0106] In this embodiment, the thickness of the light-absorbing part 121 can be between 1.5μm and 12μm. The smaller the thickness of the light-absorbing part 121, the smaller the overall thickness of the privacy module 120. Compared to the existing method of attaching a LAF film onto the display screen, this embodiment, by setting the privacy module 120, can reduce the thickness of the privacy-protecting film layer from 200μm to below 20μm.

[0107] For example, the thickness of the light-absorbing portion 121 can be 2.5μm-6.0μm. For instance, the thickness of the light-absorbing portion 121 can be 2.8μm, 3.0μm, 3.2μm, 3.5μm, 3.8μm, 4.0μm, 4.2μm, 4.5μm, 4.8μm, 5.0μm, 5.2μm, 5.5μm, 5.8μm, etc.

[0108] Furthermore, in this embodiment, the thickness of the light-absorbing part 121 can be adjusted according to the actual light emission angle range required by the privacy display screen 100a. In other words, the light emission angle range of the privacy display screen 100a can be adjusted by adjusting the thickness of the light-absorbing part 121. (Refer to...) Figure 4 As shown, taking the example where the first opening 1211 formed by the light-absorbing part 121 completely coincides with the pixel opening of the pixel 1131, the maximum light emission angle α of the pixel 1131 is determined by the distance H between the upper surface of the light-absorbing part 121 and the light-emitting surface of the pixel 1131 and the opening size L of the pixel opening of the pixel 1131, where α = H / L. Taking an emission angle range of -60° to 60° as an example, α can be set to 60°, and H can be calculated accordingly to obtain the specific thickness value of the light-absorbing part 121.

[0109] Furthermore, this embodiment also selects the optical density (OD) value of the light-absorbing part 121. Optical density is a complex property of a material that slows down the propagation speed of light and produces a certain refractive effect. Specifically, the optical density value of the light-absorbing part 121 can be greater than 0.6. In this way, the optical density value of the light-absorbing part 121 is relatively large, which allows it to absorb more energy. The light-absorbing part 121 has good light absorption performance, which can improve the privacy protection effect of the privacy module 120.

[0110] For example, the optical density value of the light-absorbing portion 121 can be between 1.0 and 1.5. The higher the optical density value of the light-absorbing portion 121, the higher its light absorption capacity. Thus, while meeting the privacy requirements, the thickness of the light-absorbing portion 121 can be appropriately reduced. A thinner privacy module 120 facilitates the reduction of the thickness of the privacy display screen 100a. For example, the optical density value of the light-absorbing portion 121 can be 1.05, 1.10, 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, etc.

[0111] Continue to refer to Figure 4In one embodiment, each light-transmitting portion 122 can completely fill each first opening 1211 formed by the light-absorbing portion 121. In other words, each first opening 1211 formed by the light-absorbing portion 121 is completely occupied by each light-transmitting portion 122, and the light-absorbing portion 121 and each light-transmitting portion 122 together constitute the light-absorbing layer 1201. For example, the two side surfaces in the thickness direction of the light-transmitting portion 122 are flush with the two side surfaces in the thickness direction of the light-absorbing portion 121, and the upper surface of the light-absorbing portion 121 and the upper surface of each light-transmitting portion 122 are located in the same plane. This gives the light-absorbing layer 1201 a flat upper surface, which facilitates the formation of other structural layers on the light-absorbing layer 1201.

[0112] When the light-transmitting portion 122 completely fills the first opening 1211 formed by the light-absorbing portion 121, each filter portion 123 can be stacked on the light-absorbing layer 1201, and each filter portion 123 is located within the filter layer 1202. Each filter portion 123 within the filter layer 1202 is correspondingly disposed on each light-transmitting portion 122. At this time, small-angle light emitted from the pixel 1131 passes through the light-transmitting portion 122 and illuminates the corresponding filter portion 123, then passes through the filter portion 123 and is emitted outwards.

[0113] For example, the shape and size of the filter portion 123 can be consistent with the shape and size of the corresponding first opening 1211 in the light-absorbing layer 1201, and the filter portion 123 completely overlaps with the light-transmitting portion 122. At this time, the gaps between each filter portion 123 can be filled with other materials to ensure the flatness of the filter layer 1202. For example, when a transparent organic resin is used to form the light-transmitting portion 122 within each first opening 1211 surrounded by the light-absorbing portion 121, the transparent organic resin can be covered with a certain thickness on the light-absorbing layer 1201, and several openings corresponding to the first openings 1211 can be formed in the transparent organic resin layer on the light-absorbing layer 1201. Then, each filter portion 123 is filled into each opening in the transparent organic resin layer.

[0114] Alternatively, with the filter portion 123 completely covering the light-transmitting portion 122, the size of the filter portion 123 can also be larger than the size of the first opening 1211. In this case, adjacent filter portions 123 can be adjacent to each other, and the filter layer 1202 is completely occupied by each filter portion 123.

[0115] Regarding the light-transmitting portion 122, which completely fills the first opening 1211 formed by the light-absorbing portion 121, refer to... Figure 4 As shown, similar to the light-absorbing portion 121, the light-transmitting portion 122 can be made of a transparent organic resin with a low refractive index. In this case, no significant light reflection occurs at the interface between the light-transmitting portion 122 and the light-absorbing portion 121. Large-angle light emitted by the pixel 1131 can pass through the light-transmitting portion 122 and propagate to the light-absorbing portion 121, where it is then absorbed.

[0116] Figure 5 This is a schematic diagram of another privacy display screen provided in an embodiment of this application. (Refer to...) Figure 5 As shown, with Figure 4 Similar to the privacy display 100a shown in the image, Figure 5 In the privacy display 100a shown, the privacy module 120 has a light-transmitting portion 122 that completely fills the first opening 1211 formed by the light-absorbing portion 121, and each light-filtering portion 123 is disposed in the light-filtering layer 1202 on the light-absorbing layer 1201.

[0117] and Figure 4 The privacy display 100a shown in the image is different. Figure 5 In the privacy display 100a shown, the privacy module 120 has a light-transmitting portion 122 made of a high-refractive-index transparent organic resin. That is, the light-absorbing portion 121 is equivalent to a low-refractive-index low-refractive-index portion, and the light-transmitting portion 122 is equivalent to a high-refractive-index high-refractive-index portion, with the refractive index of the light-transmitting portion 122 being higher than that of the light-absorbing portion 121.

[0118] At this time, when the large-angle light emitted by pixel 1131 propagates from the light-transmitting part 122 to the light-absorbing part 121, total internal reflection occurs at the interface between the light-transmitting part 122 and the light-absorbing part 121. The large-angle light is reflected back into the light-transmitting part 122 and propagates along the light-transmitting part 122 to the corresponding light-filtering part 123, and is emitted outward through the light-filtering part 123 (e.g., ...). Figure 5 (As shown by the solid arrow in the image). This reduces the light loss of pixel 1131 and improves its luminous efficiency. Furthermore, by increasing the light emission ratio of pixel 1131, the brightness of the privacy display 100a when viewed directly can be increased, thus enhancing its display effect.

[0119] Figure 6 This is a schematic diagram of the structure of a third privacy screen provided in an embodiment of this application. (Refer to...) Figure 6 As shown, with Figure 4 and Figure 5 The privacy display 100a shown in the image is different. Figure 6 In the privacy display 100a shown, the privacy module 120 does not completely fill the first openings 1211 formed by the light-transmitting portions 122, and the light-filtering portions 123 are also disposed within the first openings 1211. At this time, the light-filtering portions 123 and the light-transmitting portions 122 can be stacked and disposed within the first openings 1211 formed by the light-absorbing portions 121.

[0120] like Figure 6As shown, in one embodiment, each filter portion 123 can be formed first within each first opening 1211 of the light-absorbing portion 121, and then each light-transmitting portion 122 can be formed on each filter portion 123. That is, the light-transmitting portion 122 is stacked on the filter portion 123. In this way, the transparent organic resin used to make the light-transmitting portion 122 has good leveling properties, and by setting the light-transmitting portion 122 on the filter portion 123, the light-transmitting portion 122 forms at least a portion of the upper surface of the light-absorbing layer 1201. The flatness of the upper surface of the light-absorbing layer 1201 can be improved, making it easier to form other structural layers on the light-absorbing layer 1201.

[0121] Furthermore, by providing the light-transmitting portion 122 on the light-filtering portion 123, the light-filtering portion 123 occupies the upper space of the light-absorbing layer 1201. (Refer to...) Figure 6 As shown, in the large-angle light emitted by pixel 1131, the light propagating from the light-transmitting part 122 to the light-absorbing part 121 has a smaller angle with the interface between the light-transmitting part 122 and the light-absorbing part 121. When the light-transmitting part 122 is made of a transparent organic resin with a high refractive index, the large-angle light, after being reflected at the interface between the light-transmitting part 122 and the light-absorbing part 121, is more likely to exit upwards from the light-transmitting part 122 and will not propagate into the light-absorbing part 121 on the other side. In this way, the light-emitting loss of pixel 1131 can be reduced, the light-emitting efficiency of pixel 1131 can be improved, and the front-view brightness of the privacy display 100a can be increased.

[0122] Among them, such as Figure 6 As shown, the transparent organic resin forming each light-transmitting portion 122 can only fill the first opening 1211 of the light-absorbing portion 121, and the transparent organic resin only forms each light-transmitting portion 122. For example, the upper surface of the light-transmitting portion 122 can be flush with the upper surface of the light-absorbing portion 121. In this case, the touch layer 130 located on the privacy module 120 can be formed on the surfaces of the light-absorbing portion 121 and the light-transmitting portion 122.

[0123] Alternatively, when a transparent organic resin is used to form a light-transmitting portion 122 within each of the first openings 1211 surrounded by the light-absorbing portion 121, the transparent organic resin can cover the light-absorbing layer 1201 with a certain thickness. That is, the transparent organic resin not only forms each light-transmitting portion 122, but also completely covers the light-absorbing layer 1201, further improving the flatness of the privacy module 120. In this case, the touch layer 130 located on the privacy module 120 can be formed on the entire layer of transparent organic resin.

[0124] Of course, in other embodiments, each light-transmitting portion 122 may be formed first within each first opening 1211 of the light-absorbing portion 121, and then each light-filtering portion 123 may be formed on each light-transmitting portion 122. That is, the light-filtering portion 123 is stacked on the light-transmitting portion 122. This embodiment does not impose specific limitations on this.

[0125] For example, when the light-transmitting portion 122 is stacked on the light-filtering portion 123, and the upper surface of the light-transmitting portion 122 is flush with the upper surface of the light-absorbing portion 121, the thickness of the light-transmitting portion 122 can be consistent with the thickness of the light-filtering portion 123. Similarly, when the light-filtering portion 123 is stacked on the light-transmitting portion 122, and the upper surface of the light-filtering portion 123 is flush with the upper surface of the light-absorbing portion 121, the thickness of the light-filtering portion 123 can also be consistent with the thickness of the light-transmitting portion 122.

[0126] Figure 7 This is a schematic diagram of the structure of a fourth privacy screen provided in an embodiment of this application. (Refer to...) Figure 7 As shown, in some embodiments, the privacy module 120 may further include a hydrophobic portion 124, which is stacked on the light-absorbing portion 121. The hydrophobic portion 124 forms a plurality of arrayed second openings 1241, each second opening 1241 corresponding to a pixel opening of each pixel 1131. That is, each second opening 1241 formed by the hydrophobic portion 124 corresponds one-to-one with each first opening 1211 formed by the light-absorbing portion 121.

[0127] The hydrophobic portion 124 can be made of a hydrophobic inorganic material. For example, the hydrophobic portion 124 can be a thin layer of SiOx. The thickness of the hydrophobic portion 124 can be between 500 Å and 1500 Å, for example, the thickness of the hydrophobic portion 124 can be 600 Å, 700 Å, 800 Å, 900 Å, 1000 Å, 1100 Å, 1200 Å, 1300 Å, 1400 Å, etc.

[0128] When fabricating the privacy module 120, a light-absorbing layer 1201 is first deposited using a light-shielding material. Then, a hydrophobic layer is deposited on the light-absorbing layer 1201 using a hydrophobic inorganic material. Next, a single etching process is used to etch a plurality of second openings 1241 arranged in an array on the hydrophobic layer. Simultaneously, a plurality of first openings 1211 arranged in an array are etched on the light-absorbing layer 1201, with each first opening 1211 corresponding to and connected to each second opening 1241. Thus, a light-absorbing portion 121 and a hydrophobic portion 1241 stacked thereon are formed through a single etching process. Then, a light-filtering portion 123 and a light-transmitting portion 122 are deposited within each first opening 1211 of the light-absorbing portion 121.

[0129] Since the hydrophobic part 124 is made of hydrophobic inorganic material, when the filter part 123 and the light-transmitting part 122 are deposited in each of the first openings 1211 of the light-absorbing part 121, the hydrophobic part 124 facilitates the flow of the material of the filter part 123 and the light-transmitting part 122 into the first opening 1211, which is convenient for the formation of the filter part 123 and the light-transmitting part 122 and can improve the manufacturing efficiency of the filter part 123 and the light-transmitting part 122.

[0130] Furthermore, the hydrophobic portion 124 protects the light-absorbing portion 121 below it, preventing the light-absorbing portion 121 from being over-etched and helping to remove the residue in the first opening 1211, making the color of the filter portion 123 subsequently formed in the first opening 1211 purer.

[0131] Furthermore, the hydrophobic portion 124 is stacked on the light-absorbing portion 121, serving as an etching barrier structure for the light-absorbing portion 121 and also modifying the etching interface of each first opening 1211 formed in the light-absorbing portion 121. During the etching process of the entire light-absorbing layer 1201, by adjusting the content of the etching gas, the sidewall of the first opening 1211 can be formed into an arc-shaped sidewall, achieving the required curvature. This increases the contact area between the light-absorbing portion 121 and the light-filtering portion 123 and the light-transmitting portion 122 located within the first opening 1211, enhancing the light extraction effect of the privacy display 100a. In particular, when the light-transmitting portion 122 within the first opening 1211 is made of a high-refractive-index transparent organic material, the total internal reflection effect at the interface between the light-absorbing portion 121 and the light-transmitting portion 122 can be enhanced, reducing the light emission loss of the pixel 1131, improving the luminous efficiency of the pixel 1131, and increasing the frontal brightness of the privacy display 100a.

[0132] Since the thin hydrophobic portion 124 protrudes above the light-absorbing portion 121, the hydrophobic portion 124 can be planarized to facilitate the deposition of other structural layers on top of it. For example, when subsequently depositing transparent organic resin to form each light-transmitting portion 122, the transparent organic resin can cover the hydrophobic portion 124 with a certain thickness; that is, the entire layer of transparent organic resin covers the hydrophobic portion 124 to achieve planarization. Alternatively, the transparent organic resin can only fill the first openings 1211 of the light-absorbing portion 121, and the transparent organic resin is only used to form each light-transmitting portion 122. Other materials can be used to deposit a planarization layer 1203 on the hydrophobic portion 124 to achieve planarization of the hydrophobic portion 124.

[0133] This application also provides a method for manufacturing a privacy screen, which is used to manufacture the aforementioned privacy screen 100a.

[0134] Figure 8 A flowchart illustrating the steps of a method for manufacturing a privacy display screen according to an embodiment of this application. (Refer to...) Figure 8 As shown, the method for manufacturing a privacy screen includes the following steps:

[0135] S100, Fabricate and form a display module.

[0136] Combination Figures 4 to 7As shown in any of the examples, when fabricating the privacy display 100a, a display module 110 can be formed first. Taking an OLED display module as an example, the display module 110 includes a substrate 111 and a driving layer 112, an OLED device layer 113, and an encapsulation layer 114 sequentially stacked on the substrate 111. When fabricating the display module 110, the substrate 111 is provided first, and then the driving layer 112 is formed on the substrate 111. Then, the OLED device layer 113 is formed on the driving layer 112, and then the encapsulation layer 114 is formed on the OLED device layer 113.

[0137] It is understandable that when the display module 110 is an LCD display module, the fabrication of the privacy screen 100a also includes fabricating a backlight module and stacking the LCD display module on the backlight module. Alternatively, the backlight module and the LCD display module can be fabricated separately and then bonded together. Or, the backlight module can be fabricated first, and then the structural layers of the LCD display module can be sequentially fabricated on the backlight module.

[0138] S200, An anti-spy module is formed on the display module.

[0139] After the display module 110 is made, the next step is to make the privacy module 120 on the display module 110.

[0140] Figure 9 A flowchart illustrating the steps involved in forming a privacy module according to an embodiment of this application. (Refer to...) Figure 9 As shown, the process of forming a privacy module includes the following steps:

[0141] S210. A light-absorbing layer is deposited on the display module.

[0142] Combination Figures 4 to 7 As shown in any of the examples, a light-absorbing layer 1201 is first deposited and formed on the display module 110. For example, a black organic material is used to deposit and form the light-absorbing layer 1201, so that the light-absorbing layer 1201 completely covers the display module 110. See also... Figure 7 As shown, when the hydrophobic portion 124 is stacked on the light-absorbing portion 121, after the light-absorbing layer 1201 is deposited and formed, a hydrophobic layer is then deposited on the light-absorbing layer 1201 using a hydrophobic inorganic material.

[0143] S220, Etch the light-absorbing layer to form a light-absorbing section with a number of arrayed first openings.

[0144] Next, a photolithography process is used to etch the entire light-absorbing layer 1201 to form a plurality of arrayed first openings 1211 on the light-absorbing layer 1201, thus forming the final required light-absorbing portion 121. See also... Figure 7 As shown, when a hydrophobic layer is formed on the light-absorbing layer 1201, both the hydrophobic layer and the light-absorbing layer 1201 can be etched simultaneously in a single photolithography process to form a plurality of arrayed second openings 1241 on the hydrophobic layer, thereby forming a hydrophobic portion 124. At the same time, the light-absorbing layer 1201 is formed into a light-absorbing portion 121.

[0145] In this way, even if a hydrophobic portion 124 is added to the light-absorbing portion 121 of the privacy module 120, no additional photolithography steps are required. The hydrophobic portion 124 and the light-absorbing portion 121 can be formed simultaneously in a single photolithography process. As a result, the manufacturing process of the privacy module 120 is simple and efficient, which can save on the manufacturing cost of the privacy module 120.

[0146] S230, depositing to form a plurality of light-transmitting portions and a plurality of light-filtering portions, such that each light-transmitting portion is located within each first opening, each light-filtering portion is disposed corresponding to each first opening, and the color of each light-filtering portion is the same as the color of the corresponding pixel.

[0147] After the light-absorbing portion 121 is formed, a plurality of light-transmitting portions 122 and a plurality of light-filtering portions 123 are deposited on the light-absorbing portion 121 (or the hydrophobic portion 124), such that each light-transmitting portion 122 is located within each first opening 1211, and each light-filtering portion 123 is disposed corresponding to each first opening 1211, thereby forming a privacy module 120. The color of each light-filtering portion 123 is the same as the color of the corresponding pixel 1131.

[0148] Among them, see Figure 4 As shown, when each light-transmitting portion 122 completely fills each first opening 1211 formed by the light-absorbing portion 121, and each light-filtering portion 123 is stacked on the light-absorbing layer 1201, after the light-absorbing portion 121 is formed, each light-transmitting portion 122 can be deposited and formed in each first opening 1211, so that the light-transmitting portion 122 completely fills the first opening 1211. Then, each light-filtering portion 123 is deposited and formed on each light-transmitting portion 122, so that each light-filtering portion 123 is located within the light-filtering layer 1202.

[0149] For example, the upper surface of each light-transmitting portion 122 can be flush with the upper surface of the light-absorbing portion 121, so that the light-absorbing layer 1201 composed of the light-absorbing portion 121 and each light-transmitting portion 122 has a flat upper surface, which facilitates the deposition and formation of each filter portion 123 on the light-absorbing layer 1201.

[0150] As an example, the shape and size of each filter portion 123 can be consistent with the shape and size of the corresponding first opening 1211 in the light-absorbing layer 1201, and each filter portion 123 completely overlaps with each light-transmitting portion 122. In this case, other materials can be deposited on the light-absorbing layer 1201 first, and the material layer can be etched to form a plurality of openings corresponding to the first opening 1211 in the material layer, and each filter portion 123 can be filled into each opening of the material layer. Alternatively, when depositing and forming each light-transmitting portion 122, a transparent organic resin can be covered on the light-absorbing layer 1201 with a certain thickness, and by etching the transparent organic resin layer on the light-absorbing layer 1201, a plurality of openings corresponding to the first opening 1211 can be formed in the transparent organic resin layer, and each filter portion 123 can be filled into each opening of the transparent organic resin layer.

[0151] As another example, based on the fact that the filter portion 123 completely covers the light-transmitting portion 122, the size of the filter portion 123 can be larger than the size of the first opening 1211. When each filter portion 123 is deposited and formed on the light-absorbing layer 1201, each filter portion 123 is adjacent to each other, and the filter layer 1202 is completely occupied by each filter portion 123.

[0152] See Figures 5 to 7 As shown in any one of the diagrams, when each light-transmitting portion 122 does not completely fill each first opening 1211 surrounded by the light-absorbing portion 121, and each light-filtering portion 123 is also disposed within each first opening 1211, each light-filtering portion 123 and each light-transmitting portion 122 can be deposited and formed within the first opening 1211, so that each light-filtering portion 123 and each light-transmitting portion 122 are stacked.

[0153] In the example shown, the light-transmitting portion 122 is stacked on the light-filtering portion 123. In this case, the light-filtering portion 123 can be formed by depositing material into each first opening 1211 firstly, and then the light-transmitting portion 122 can be formed by depositing material onto each light-filtering portion 123. For example, the transparent organic resin forming each light-transmitting portion 122 can only fill the first opening 1211 of the light-absorbing portion 121, and the transparent organic resin only forms each light-transmitting portion 122. Alternatively, a larger amount of transparent organic resin can be deposited on the light-absorbing portion 121, and the transparent organic resin not only fills each first opening 1211 to form each light-transmitting portion 122, but also covers the light-absorbing layer 1201 with a certain thickness.

[0154] Of course, in other examples, the filter portion 123 can also be stacked on the light-transmitting portion 122. In this case, the light-transmitting portion 122 can be deposited and formed in each first opening 1211 first, and then the filter portion 123 can be deposited and formed on each light-transmitting portion 122. For example, the filter portion 123 can fill only the first opening 1211 of the light-absorbing portion 121. For example, the upper surface of the filter portion 123 can be flush with the upper surface of the light-absorbing portion 121.

[0155] S300, A touch layer is formed on the privacy module.

[0156] Combination Figures 4 to 7 As shown in either case, after forming the privacy module 120, a touch layer 130 is then formed on the privacy module 120. After forming the touch layer 130, an optical adhesive layer 140 may also be formed on the touch layer 130, and a cover plate 150 may be provided on the optical adhesive layer 140 to form a privacy display screen 100a.

[0157] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0158] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

Claims

1. A privacy screen, characterized in that, include: The display module includes several pixels arranged in an array; A privacy protection module is stacked on the display module; A touch layer is stacked on the privacy module; The privacy module includes: A light-absorbing portion, stacked on the display module, is used to absorb the light emitted by each pixel; the light-absorbing portion forms a plurality of first openings arranged in an array, each first opening being directly opposite the pixel opening of each pixel; Several light-transmitting portions are disposed within each of the first openings; A plurality of filter sections are provided, each filter section being disposed corresponding to each of the first openings, and the color of each filter section is the same as the color of the corresponding pixel.

2. The privacy display screen according to claim 1, characterized in that, The orthographic projection of the first opening onto the display assembly completely coincides with the pixel opening.

3. The privacy display screen according to claim 1, characterized in that, The light-absorbing part is a low-refractive-index part, and the light-transmitting part is a high-refractive-index part. The refractive index of the light-transmitting part is higher than that of the light-absorbing part.

4. The privacy display screen according to any one of claims 1-3, characterized in that, The light-transmitting portion completely fills the first opening, and the plurality of light-filtering portions are disposed within the light-filtering layer on the light-transmitting portion.

5. The privacy display screen according to any one of claims 1-3, characterized in that, The light-filtering part is also disposed within the first opening, and the light-filtering part and the light-transmitting part are stacked.

6. The privacy display screen according to claim 5, characterized in that, The light-transmitting part is stacked on the light-filtering part.

7. The privacy display screen according to claim 5, characterized in that, The thickness of the filter portion is the same as the thickness of the light-transmitting portion.

8. The privacy display screen according to any one of claims 1-3, characterized in that, The privacy module also includes: The hydrophobic portion is stacked on the light-absorbing portion and forms a plurality of second openings arranged in an array, each of the second openings being directly opposite the pixel opening of each pixel.

9. The privacy display screen according to claim 8, characterized in that, The sidewall of the light-absorbing part that forms the first opening is an arc-shaped sidewall.

10. The privacy display screen according to any one of claims 1-3, characterized in that, The optical density of the light-absorbing part is greater than 0.

6.

11. The privacy display screen according to claim 10, characterized in that, The optical density of the light-absorbing part is 1.0-1.

5.

12. The privacy display screen according to any one of claims 1-3, characterized in that, The thickness of the light-absorbing part is 1.5μm-12μm.

13. The privacy display screen according to claim 12, characterized in that, The thickness of the light-absorbing part is 2.5μm-6.0μm.

14. The privacy display screen according to any one of claims 1-3, characterized in that, The display module includes: Base; A driving layer is stacked on the substrate; An OLED device layer is stacked on the driving layer; An encapsulation layer is stacked on the OLED device layer.

15. A method for manufacturing a privacy screen, characterized in that, include: To create a display module; An anti-peeping module is formed on the display module; A touch layer is formed on the privacy module; The privacy module comprises: A light-absorbing layer is deposited on the display module; The light-absorbing layer is etched to form a light-absorbing portion having a plurality of arrayed first openings; A plurality of light-transmitting portions and a plurality of light-filtering portions are deposited, such that each light-transmitting portion is located within each of the first openings, each light-filtering portion is disposed corresponding to each of the first openings, and the color of each light-filtering portion is the same as the color of the corresponding pixel.

16. The method for manufacturing a privacy display screen according to claim 15, characterized in that, The deposition forms several light-transmitting sections and several light-filtering sections, including: Each of the light-transmitting portions is deposited within each of the first openings, such that the surface of the light-transmitting portion is flush with the surface of the light-absorbing portion; Each of the light-transmitting portions is deposited on each of the light-transmitting portions to form a light-filtering portion, such that each of the light-filtering portions is located within a light filter.

17. The method for manufacturing a privacy display screen according to claim 16, characterized in that, The deposition forms several light-transmitting sections and several light-filtering sections, including: Each of the light-filtering portions and each of the light-transmitting portions are deposited and formed in each of the first openings, so that the light-filtering portions and the light-transmitting portions are stacked.

18. The method for manufacturing a privacy display screen according to claim 17, characterized in that, The deposition forms several light-transmitting sections and several light-filtering sections, including: Each of the filter portions is deposited within each of the first openings; Each of the light-transmitting portions is formed by depositing on each of the light-filtering portions.

19. The method for manufacturing a privacy display screen according to any one of claims 15-18, characterized in that, After forming the light-absorbing layer, the process further includes: A hydrophobic layer is deposited on the light-absorbing layer; The hydrophobic layer and the light-absorbing layer are etched in one step, so that the hydrophobic layer is formed into a hydrophobic portion having a plurality of arrayed second openings, and the light-absorbing layer is formed into the light-absorbing portion.

20. An electronic device, characterized in that, It includes a housing and a privacy display screen as described in any one of claims 1-14, wherein the privacy display screen is mounted on the housing.

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