Optical modules, display devices, display equipment and electronic equipment

Abstract

This application provides an optical module, a display device, a display apparatus, and an electronic device to address the problem that display devices equipped with anti-glare covers struggle to achieve low flicker and high definition. The optical module is applied to the display device, which includes a display panel. The optical module includes a light-diffusing layer and an anti-glare layer sequentially disposed along the light-emitting direction of the display panel. When collimated light is incident perpendicularly, the light intensity distribution generated by the light-diffusing layer satisfies the condition that the light intensity attenuation is less than or equal to a first threshold within a set emission angle range. The light-diffusing layer uniformly mixes the light emitted from the display panel. When the light mixed by the light-diffusing layer enters the anti-glare layer, flickering is avoided. This eliminates the need to increase the haze of the anti-glare layer to suppress flickering, thus ensuring the clarity of the displayed image.

Description

[0001] This application is a divisional application. The original application has the application number 202480008187.1 and the original application date is July 30, 2024. The entire contents of the original application are incorporated herein by reference.

[0002] This application claims priority to Chinese patent application filed on August 1, 2023, with application number 202310970152.3 and entitled "Optical Module, Display Device, Display Equipment and Electronic Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of display technology, and in particular to an optical module, display device, display equipment, and electronic equipment. Background Technology

[0004] Display devices are typically protected externally by a cover made of a translucent material (e.g., glass or plastic). Under ambient light (such as outdoor sunlight and indoor lighting), the visual performance of existing display devices is susceptible to glare due to reflections from this flat panel. For example, when viewing a display device in strong ambient light, the flat panel is prone to specular reflections, creating noticeable mirror images and thus interfering with the visual experience.

[0005] To suppress glare, the surface roughness of the flat panel is typically increased to form an anti-glare layer. This scatters the light shining onto the panel, making it less prone to specular reflection and reducing the negative impact of the panel on the visual viewing experience. However, the anti-glare layer not only scatters ambient light but also the light emitted by the pixels. Crosstalk caused by the scattering of light from different pixels can lead to flickering. While increasing the haze of the anti-glare layer can suppress flickering, this reduces the image sharpness of the display device. Summary of the Invention

[0006] To address the issue that display devices with anti-glare layers struggle to balance low flicker point and high definition, embodiments of this application provide an optical module, a display device, a display equipment, and an electronic device.

[0007] In a first aspect, embodiments of this application provide an optical module applied to a display device. The display device includes a display panel, and the optical module includes a light-diffusing layer and an anti-glare layer sequentially disposed in the light-emitting direction of the display panel. The light-diffusing layer generates an outgoing light intensity distribution when collimated light is incident perpendicularly, which satisfies that the light intensity attenuation is less than or equal to a first threshold within a set outgoing angle range.

[0008] The optical module provided in this application includes a light-diffusing layer and an anti-glare layer. The anti-glare layer prevents glare, while the light-diffusing layer uniformly mixes the light emitted from the display panel. Without a light-diffusing layer, the light emitted from the display panel will experience crosstalk of different colors after being scattered by the anti-glare layer. Due to scattering, bright or dark spots will also appear, forming flickering. However, the optical module provided in this application has a light-diffusing layer before the anti-glare layer. The exit angle of the light emitted from the display panel increases after passing through the light-diffusing layer. When the uniformly mixed light enters the anti-glare layer and is scattered, it scatters the mixed light of different colors, rather than scattering a single color, thus avoiding alternating bright and dark areas and suppressing flickering. Therefore, it is not necessary to increase the haze of the anti-glare layer to suppress flickering. The optical module provided in this application suppresses glare and screen flickering through the combined effect of the light-diffusing layer and the anti-glare layer. The anti-glare layer can be set with a small haze parameter, thus ensuring high image clarity for the display device and meeting the requirements of both low flickering and high clarity.

[0009] In one possible implementation, the roughness of the anti-glare layer is 0.2 μm to 0.35 μm, and the haze of the anti-glare layer is less than or equal to a second threshold.

[0010] In one possible implementation, the outgoing light intensity distribution generated by the homogenizing layer when collimated light is incident perpendicularly satisfies the following: the light intensity attenuation is less than or equal to a first threshold within a set outgoing angle range, where the light intensity attenuation refers to the attenuation of the outgoing light intensity relative to the outgoing light intensity when the outgoing angle is 0, and the first threshold is less than or equal to 30%.

[0011] The light emitted from the light homogenizing layer experiences minimal light intensity attenuation within a set emission angle range, effectively expanding the light emission angle of the light homogenizing layer. The light emitted from the display panel can be uniformly mixed after passing through the light homogenizing layer, which, combined with the scattering effect of the anti-glare layer, can reduce flicker.

[0012] In one possible implementation, the aforementioned range of launch angles includes to .

[0013] The larger the emission angle range of the homogenizing layer, the smaller the attenuation of the emitted light intensity within the emission angle range, the better the homogenizing effect of the homogenizing layer, and the stronger the effect of suppressing flash point.

[0014] In one possible implementation, the homogenizing layer includes a filling layer and a grating embedded between the filling layers, the grating having a different refractive index than the filling layer.

[0015] The light-diffusing layer is composed of gratings and filling layers with different refractive indices. Since the refractive indices of the two are different, the light emitted from the display panel can expand the emission angle and reduce the light intensity attenuation when passing through the gratings and filling layers with different refractive indices.

[0016] In one possible implementation, the refractive index of the grating and the refractive index of the filling layer satisfy: |n1-n2|>0.005, where n1 is the refractive index of the grating and n2 is the refractive index of the filling layer.

[0017] In one possible implementation, the filling layer covers the side of the grating away from the display panel.

[0018] In one possible implementation, the refractive index of the grating and the refractive index of the filling layer satisfy: n1-n2>0.005, where n1 is the refractive index of the grating and n2 is the refractive index of the filling layer.

[0019] In one possible implementation, the grating comprises multiple columnar structures, and the center distance between any two columnar structures and the feature size of the columnar structures satisfy: 3D ≥ P>D, where D is the feature size of the columnar structure and P is the center distance between any two columnar structures.

[0020] In one possible implementation, the thickness of the homogenizing layer is less than or equal to 150 μm.

[0021] In one possible implementation, the second threshold is less than or equal to 35%. The anti-glare layer can maintain a low haze parameter, which can mitigate the impact on the sharpness of images of real-world devices and maintain high sharpness while suppressing flash points.

[0022] In one possible implementation, the anti-glare value of the anti-glare layer is less than or equal to 10%.

[0023] In one possible implementation, the thickness of the anti-glare layer is less than or equal to 1 mm.

[0024] Secondly, embodiments of this application also provide a display device, which includes a display panel, a polarizer, and a module as provided in any implementation of the first aspect. The optical module includes a light-diffusing layer and an anti-glare layer. The polarizer, the light-diffusing layer, and the anti-glare layer are arranged sequentially in the light-emitting direction of the display panel, or the light-diffusing layer, the polarizer, and the anti-glare layer are arranged sequentially in the light-emitting direction of the display panel.

[0025] In one possible implementation, the display device further includes a touch circuit layer disposed between the light-diffusing layer and the polarizer.

[0026] In one possible implementation, the display device also includes a touch circuit integrated on the display panel.

[0027] Thirdly, embodiments of this application also provide a display device, which includes a display panel and a module as provided in any implementation of the first aspect. The optical module includes a light-diffusing layer and an anti-glare layer. A color filter is disposed on the display panel, and the light-diffusing layer and the anti-glare layer are disposed sequentially in the light-emitting direction of the display panel.

[0028] Fourthly, embodiments of this application also provide a display device, which includes a housing and a display apparatus as provided in any implementation of the second aspect, wherein the display apparatus is mounted on the housing, and the housing is used to support and protect the display apparatus.

[0029] Fifthly, embodiments of this application also provide an electronic device, which includes a processor and a display device as provided in any implementation of the second aspect, wherein the display device is electrically connected to the processor. Attached Figure Description

[0030] Figure 1 A schematic diagram of an electronic device provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application; Figure 3 A schematic diagram of glare generation provided in an embodiment of this application; Figure 4 A schematic diagram illustrating the glare suppression provided by the anti-glare layer in an embodiment of this application; Figure 5 A schematic diagram of the anti-glare layer provided in the embodiments of this application; Figure 6 A schematic diagram illustrating the flash point generation of the anti-glare layer provided in this application embodiment; Figure 7 This is a schematic diagram of screen flickering provided for an embodiment of this application; Figure 8 A schematic diagram of haze provided for an embodiment of this application; Figure 9 A schematic diagram of the optical module provided in the embodiments of this application; Figure 10 Another schematic diagram of the optical module provided in the embodiments of this application; Figure 11 A schematic diagram illustrating the flash point generation of the anti-glare layer provided in this application embodiment; Figure 12 This is a schematic diagram illustrating the working principle of the optical module provided in the embodiments of this application; Figure 13 The light intensity distribution diagram of the emitted light from the homogenizing layer provided in the embodiments of this application; Figure 14 A schematic diagram comparing the light intensity distribution of the emitted light from the homogenizing layer provided in the embodiments of this application; Figure 15 This is a schematic diagram of the structure of a light-diffusing layer provided in an embodiment of this application; Figure 16 This is a schematic diagram of another homogenizing layer structure provided in an embodiment of this application; Figure 17 Here are schematic diagrams of the structures of several homogenizing layers provided in the embodiments of this application; Figure 18 These are schematic diagrams of the structures of two light-diffusing layers provided in the embodiments of this application; Figure 19 Schematic diagrams of the structures of two other light-diffusing layers provided in the embodiments of this application; Figure 20 This is a schematic diagram of another homogenizing layer structure provided in an embodiment of this application; Figure 21 This is a schematic diagram of the anti-glare layer provided in an embodiment of this application; Figure 22 A schematic diagram of a display device provided in an embodiment of this application; Figure 23 A schematic diagram of another display device provided in the embodiments of this application; Figure 24 A schematic diagram of another display device provided in the embodiments of this application; Figure 25 A schematic diagram of another display device provided in the embodiments of this application; Figure 26 This is a schematic diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0032] Hereinafter, the terms "first," "second," etc., are used for descriptive convenience only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more. For example, multiple processing units refer to two or more processing units.

[0033] Furthermore, in the embodiments of this application, "upper" and "lower" are not limited to the orientation of the components schematically placed in the accompanying drawings. It should be understood that these directional terms can be relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings. In the accompanying drawings, for clarity, the thickness of layers and regions is exaggerated, and the dimensional proportions between the parts in the drawings do not reflect the actual dimensional proportions.

[0034] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0035] In this application, the term "module" typically refers to a logically divided functional structure. A "module" can be implemented purely in hardware, or a combination of hardware and software. In this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, B existing alone, or both A and B existing simultaneously.

[0036] In this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being better or more advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0037] The solutions provided in this application can be applied to electronic devices, such as mobile phones, personal computers (PCs), tablets, smart wearable products (e.g., smartwatches, smart bracelets), virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, in-vehicle terminals, displays, and other electronic devices. Alternatively, they can be any electronic device that requires the configuration of buttons. This application does not impose any special restrictions on the specific form of the aforementioned electronic devices.

[0038] Taking a mobile phone as an example, Figure 1 A schematic diagram of the structure of an electronic device provided in this application is shown. Please refer to [link / reference]. Figure 1The electronic device may include: a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, a headphone jack 170D, a sensor 180, a motor 191, an indicator 192, a camera 193, a display device 194, a subscriber identification module (SIM) card interface 195, and a button module 196, etc.

[0039] It is understood that the structure illustrated in this embodiment does not constitute a specific limitation on the electronic device. In other embodiments, the electronic device may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0040] Processor 110 may include one or more processing units, such as: application processor (AP), modem processor, graphics processing unit (GPU), image signal processor (ISP), controller, memory, video codec, digital signal processor (DSP), baseband processor, and / or neural network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0041] The processor 110 may also include a memory for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. This memory can store instructions or data that the processor 110 has just used or that are used repeatedly. If the processor 110 needs to use the instruction or data again, it can retrieve it directly from the memory. This avoids repeated accesses, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

[0042] It is understood that the interface connection relationships between the modules illustrated in this embodiment are merely illustrative and do not constitute a structural limitation on the electronic device. In other embodiments, the electronic device may also employ different interface connection methods or combinations of multiple interface connection methods as described in the above embodiments.

[0043] Display device 194 is used to display text, images, videos, etc. As a primary I / O device, display device 194 plays an irreplaceable role in daily use and office scenarios. For example, mobile phones, tablets, personal computers, televisions, smart wearable devices, or other electronic devices that require human-computer interaction are all equipped with display devices to display information; alternatively, display devices can also have touch functionality, also known as touchscreens or touch panels, which can respond to user operations and obtain user commands.

[0044] like Figure 2 As shown, Figure 2 A schematic diagram of the assembly structure of an electronic device is shown, including a display device 194, a middle frame 197, and a back cover 198. The display device 194 and the back cover 198 are respectively disposed on both sides of the middle frame 197 and are fixedly bonded to the middle frame 197. The structure of the display device 194 mainly includes a display panel 1941 and a cover plate 1942; wherein, the cover plate 1942 is stacked with the display panel 1941, and the cover plate 1942 is located on the light-emitting side of the display panel 1941 and connected to the display panel 1941. For example, the cover plate 1942 can be bonded to the display panel 1941.

[0045] Here, the material of the cover plate 1942 can be, for example, glass, transparent resin, etc. When the material of the cover plate 1942 is glass, the cover plate 1942 can also be called a glass cover or cover glass.

[0046] It should be noted that the display panel 1941 can be a liquid crystal display (LCD) panel or a self-emissive display panel. When the display panel 1941 is a self-emissive display panel, it can be, for example, an organic light-emitting diode (OLED) display panel or a quantum dot light-emitting diode (QLED) display panel. When the display panel 1941 is a liquid crystal display panel, the aforementioned display device 194 can be referred to as a liquid crystal display device; when the display panel 1941 is a self-emissive display panel, the aforementioned display device 194 can be referred to as a self-emissive display device.

[0047] Display devices display images or information using multiple pixels. A display panel includes multiple pixels, each displaying its own color. The colors displayed by multiple pixels are combined to form the displayed image. Typically, each pixel includes three sub-pixels: red, green, and blue. Each pixel displays color by adjusting the color ratio of its three sub-pixels, and ultimately, all the pixels combine to form the displayed image.

[0048] Currently, the most commonly used display devices in electronic devices include liquid crystal displays (LCDs) and organic light-emitting diodes (OLEDs). LCDs primarily rely on a backlight layer, which emits white light. A colored thin film sits on top of the backlight layer, allowing color to be displayed through the film. A liquid crystal layer lies between the backlight layer and the colored film, adjusting the proportions of red, blue, and green to display different colors. OLEDs, on the other hand, use organic light-emitting materials, allowing each pixel to emit its own light—meaning they are self-emissive. They do not require a backlight layer or liquid crystal layer like LCDs. Therefore, they can be made thinner and lighter, consume less power, and have a wider range of applications, enabling special functions such as under-display fingerprint scanning and flexible screens.

[0049] The main function of display devices is to effectively display information. Centered on this, a series of technological development directions have been expanded. For example, on mobile phones, higher resolution (>400ppi), richer color display capabilities (>95% DCI-P3), and lower power consumption (video playback battery life >20 hours) have become the mainstream pursuit of display technology.

[0050] Furthermore, aside from the quality of the display screen itself, different design strategies for electronic devices have emerged to suit different application scenarios. For example, when privacy protection is a priority, a screen with privacy protection can be created by adding an additional film layer to the display screen that allows light transmittance to vary with viewing angle.

[0051] Today, with the increasing number of display device usage scenarios, consumers are beginning to pay attention to the harmful effects of display devices on human eyes. Reducing visual fatigue or discomfort caused by viewing display screens has become one of the mainstream design directions for advanced display devices. This includes a series of display device designs such as low blue light, flicker-free, low reflection, and anti-glare.

[0052] Among them, see Figure 3Glare refers to the dazzling effect produced by the screen of a display device due to the specular reflection of ambient light. For point light sources in daily life (such as lamps and sunlight), the brightness is high and unsuitable for direct viewing. When users use devices with displays, such as mobile phones, the screen reflects sunlight in sunlight, causing eye discomfort and making it difficult to see the displayed information. Similarly, when using a phone under lamplight, the screen reflects light, creating bright spots that affect normal use. Glare makes it harder for users to see the displayed content and may even cause eye discomfort and affect vision. Therefore, anti-glare (AG) technology has become an important research direction in display technology.

[0053] As mentioned in the previous example, glare is caused by specular reflection of ambient light on the screen. Therefore, one approach to anti-glare is to avoid specular reflection, for example, by increasing the roughness of the screen so that the light shining on the screen is less likely to form specular reflection, thus avoiding glare.

[0054] For example, see Figure 4 By "roughening" the cover plate or film layer on the screen surface to form an anti-glare structure, the reflective surface of the screen (a flat mirror surface) is transformed into a non-reflective matte surface (an uneven, rough surface), giving it a lower reflectivity compared to ordinary screens. When ambient light shines on the screen, diffuse reflection occurs, avoiding specular reflection and thus preventing glare.

[0055] The anti-glare capability of a screen can be measured by its anti-glare value, also known as the Bidirectional Reflectance Distribution Function (BRDF). It describes how incident light rays are distributed in various outgoing directions after being reflected by a surface. In other words, when light rays are incident on a surface from a certain direction, their energy is absorbed by the surface and then emitted in various directions; therefore, it can be used to describe the surface's anti-glare level. Its unit is 1 / solid angle, or sr. -1 The anti-glare value refers to the decrease in value at a 1° angle compared to 0° (normal viewing angle). For example: BRDF (0°) = a, BRDF (1°) = b, anti-glare value = (ab) / a.

[0056] The screen surface is usually a glass cover or a film structure. (See also...) Figure 5 , Figure 5 A schematic diagram of the anti-glare cover is shown. Figure 5The anti-glare cover shown in Figure a is a glass cover. The surface of the glass cover is formed with an uneven microstructure by chemical etching or spraying anti-glare material. This is called an anti-glare structure. The uneven microstructure usually appears in an irregular arrangement, which causes the light incident on the surface of the cover to be diffused and avoids glare.

[0057] Figure 5 The anti-glare cover shown in Figure a uses a single glass cover. Figure 5 Figure b shows a schematic diagram of another type of anti-glare cover. Figure 5 The anti-glare cover shown in Figure b is a composite cover. The composite cover is based on thermoplastic material and combines two different materials, such as polymethyl methacrylate and polycarbonate (PMMA+PC), through hot pressing. An uneven microstructure is made on one side, for example, by nanoimprinting or other methods. The uneven microstructure usually appears in an irregular arrangement, so that the light incident on the surface of the cover is diffused and avoids glare.

[0058] In some other possible implementations, anti-glare in display devices can also be achieved by attaching an additional anti-glare film layer (such as a frosted protective film) to the screen surface. The principle of this anti-glare film layer is essentially the same as that of an anti-glare cover plate; both prevent glare by creating an uneven microstructure on the surface. The difference lies in that the anti-glare film is usually placed on the outermost layer of the screen structure and can be applied as needed. In general, anti-glare covers or anti-glare film layers, by creating an uneven microstructure on the surface, can cause diffuse reflection of ambient light, thus avoiding glare.

[0059] According to technical requirements, achieving anti-glare functionality involves managing both the light emitted from the screen and the ambient light reflected off the screen. While the primary function of anti-glare covers and films is to scatter light through their uneven microstructures to achieve diffuse reflection of ambient light, these anti-glare structures can also scatter the light emitted by the display panel, causing uneven crosstalk between different sub-pixels and resulting in visual flickering.

[0060] A glare point refers to the phenomenon where light emitted from a pixel passes through an anti-glare layer, causing the light emitted from the display panel to be scattered on the surface of the anti-glare layer. Interference occurs between the scattered light from different locations, resulting in the effect of colored dots or bright and dark spots when viewed by the human eye, thus affecting the display effect.

[0061] like Figure 6Figure a shows a schematic diagram illustrating how light emitted from the display panel reaches the human eye when the glass cover of the display device has a smooth surface (i.e., no anti-glare layer). Generally, the image displayed in a display device can be considered as being composed of a large number of pixels. For example, an image with a resolution of 1920×1080 can be considered as having 1920 pixels per row and 1080 pixels per column. Each pixel includes three sub-pixels: a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, which respectively display red, green, and blue light.

[0062] from Figure 6 As shown in Figure a, when the display device does not have an anti-glare layer, the amount of light transmitted through the glass cover by the red sub-pixel R, green sub-pixel G, and blue sub-pixel B in each pixel of the display device is the same. As a result, the amount of light of different colors reaching the human eye is the same. For example, when the amount of light transmitted by the red sub-pixel R, green sub-pixel G, and blue sub-pixel B is the same, what the human eye sees is normal white.

[0063] When the display device has an anti-glare layer, such as Figure 6 As shown in Figure b, the light emitted by the red sub-pixel R, green sub-pixel G, and blue sub-pixel B in each pixel unit of the display device passes through the anti-glare layer. Due to the uneven anti-glare structure on the surface of the anti-glare layer, the red light emitted by the red sub-pixel R, the green light emitted by the green sub-pixel G, and the blue light emitted by the blue sub-pixel B will crosstalk with each other. This results in uneven amounts of different colors of light reaching the user's field of vision, and crosstalk between different colors of light. For example, a certain area may have more red, blue, and green light, producing a bright white spot; a certain area may have less light, producing a dark spot; and a certain area may have more red light, producing a reddish bright spot. This phenomenon of alternating bright and dark areas is called the flickering phenomenon. (See also...) Figure 7 , Figure 7 The diagram illustrates screen glare. Screen glare affects display quality and visual effects. Therefore, anti-glare technology needs to focus on reducing or eliminating the glare caused by ambient light reflected from the screen. On the other hand, since anti-glare technology also directly affects the screen's performance (such as clarity and glare), the development of anti-glare technology needs to take into account both the management of reflected ambient light and the management of pixel light emission.

[0064] To address the flash point issue, the haze parameter is typically controlled during the fabrication of the screen's anti-glare layer. (See also...) Figure 8 Haze describes one of the physical properties of light after it passes through a medium and is scattered. It is defined as the percentage of transmitted light intensity that deviates from the incident light by more than 2.5° from the total transmitted light intensity. The greater the haze, the lower the clarity.

[0065] Controlling the haze parameters of the anti-glare layer can achieve a more uniform light mixing effect from the light emitted from the display panel, thus reducing the flicker effect. However, this will reduce the clarity of the display. For example, refer to Table 1, which shows the status of flicker and clarity at different haze levels.

[0066]

[0067] Table 1 As shown in Table 1, while increasing haze can suppress flashing, it also leads to a significant decrease in sharpness. If high haze is needed to mitigate the impact of flashing, it will result in a severe drop in sharpness. In summary, to avoid glare, one possible approach is to incorporate an anti-glare layer into the screen. This layer scatters ambient light across the screen surface, preventing glare. However, the anti-glare structure also scatters light emitted from the display panel, causing significant crosstalk between different pixels and resulting in flashing. To suppress screen flashing, the haze parameter of the anti-glare layer is typically increased, but this also reduces screen sharpness. Therefore, current anti-glare solutions cannot simultaneously achieve both low flashing and high sharpness.

[0068] To address the aforementioned issues, this application provides a novel optical module. The anti-glare layer in the previous example caused screen flickering due to its uneven surface, which resulted in more pronounced scattering directionality. Light emitted from the display panel, after being scattered by the anti-glare layer, exhibited significant crosstalk, leading to screen flickering. To suppress this flickering, this application adds a homogenizing layer before the light emitted from the display panel passes through the anti-glare layer. The light passes through the homogenizing layer first and then the anti-glare layer, ensuring that the homogenized light pattern no longer exhibits significant directionality over a wider angle. This prevents the anti-glare layer's scattering effect from causing significant crosstalk, effectively suppressing screen flickering without increasing haze. Therefore, image clarity is also guaranteed.

[0069] like Figure 9 As shown, Figure 9 A schematic diagram of an optical module provided in an embodiment of this application is shown. The optical module is applied to a display device, which includes a display panel 220. The optical module 210 includes a light-diffusing layer 211 and an anti-glare layer 212 sequentially disposed in the light-emitting direction of the display panel 220.

[0070] For example, the light-diffusing layer 211 and anti-glare layer 212 sequentially disposed in the light-emitting direction of the display panel 220 provided in this application embodiment only limit the relative positional relationship between the display panel 220, the light-diffusing layer 211 and the anti-glare layer 212, and do not mean that the display panel 220, the light-diffusing layer 211 and the anti-glare layer 212 must be adjacent. For example, for the display panel 220, the light-diffusing layer 211 and the anti-glare layer 212, the light-diffusing layer 211 can be in contact with the display panel 211 and the anti-glare layer 212 can be in contact with the light-diffusing layer 211; or, other layers (such as polarizers) can be disposed between the display panel 220 and the light-diffusing layer 211, and other layers can be disposed between the light-diffusing layer 211 and the anti-glare layer 212.

[0071] See Figure 10 The anti-glare layer 212 has an uneven anti-glare structure 2121 on its surface in the direction of light emission, which is used to scatter ambient light and avoid specular reflection of ambient light to prevent glare. Since the anti-glare layer 212 also scatters the light emitted by the display panel 220, causing screen flicker, the optical module 210 provided in this application embodiment is provided with a light-diffusing layer 211. The light-diffusing layer 211 is used to uniformly mix the light emitted by the display panel 220 before it enters the anti-glare layer 212, so that the scattered light pattern is more uniform and has no obvious directionality. In this way, when the uniformly mixed light passes through the anti-glare layer 212, it can avoid the generation of flicker.

[0072] like Figure 11 As shown, without a uniform light layer, the uniform light effect is poor due to its relatively more prominent scattering directionality. For example, the light emitted by the red sub-pixel R enters the anti-glare layer A1 area; the light emitted by the green sub-pixel G enters the anti-glare layer B1 area; and the light emitted by the blue sub-pixel B enters the anti-glare layer C1 area. The anti-glare layer will scatter the red light in A1 area, the green light in B1 area, and the blue light in C1 area. Since the light emitted by the red, green, and blue sub-pixels has not been uniformly distributed and each has its own directionality, the light emitted by different pixels will crosstalk after being scattered by the anti-glare layer, resulting in a serious flicker problem.

[0073] In this embodiment, a light-diffusing layer 211 is provided before the anti-glare layer 212. The light emitted from the display panel 220 is uniformly mixed by the light-diffusing layer 211 before it enters the anti-glare layer 212, making the scattered light pattern more uniform. For example, the light emitted from the red sub-pixel R reaches the anti-glare layer A1 and B1 regions after being uniformized by the light-diffusing layer 211; the light emitted from the green sub-pixel G reaches the anti-glare layer A1, B1, and C1 regions after being uniformized by the light-diffusing layer 211; and the light emitted from the blue sub-pixel B reaches the anti-glare layer B1 and C1 regions after being uniformized by the light-diffusing layer 211. After passing through the light-diffusing layer 211, the light emitted by each pixel of the display panel 220 is mixed together and no longer has obvious directionality. In this way, when the anti-glare layer 212 scatters the uniformly diffused light, it can suppress the generation of flicker.

[0074] As mentioned in the previous example, the flickering is caused by crosstalk resulting from the scattering of different colors of light emitted by the display panel after passing through the anti-glare layer. For example, crosstalk occurs between the red light emitted by the red sub-pixel and the green light emitted by the green pixel, and between the green light emitted by the green pixel and the blue light emitted by the blue pixel. Combined with... Figure 11 The light emitted by the red sub-pixel R enters the A1 region of the anti-glare layer 211; the light emitted by the green sub-pixel G reaches the B1 region of the anti-glare layer; the light emitted by the blue sub-pixel B enters the C1 region of the anti-glare layer; the red light is scattered after passing through the A1 region of the anti-glare layer, the green light is scattered after passing through the B1 region of the anti-glare layer, and the blue light is scattered after passing through the C1 region of the anti-glare layer. Since the scattering has no obvious directionality, crosstalk will occur after the light of different colors is scattered in the anti-glare layer, resulting in screen flicker.

[0075] Please see Figure 12 The solution provided in this application embodiment includes a light-diffusing layer 211 before the anti-glare layer 212. The light-diffusing layer 211 can perform light-diffusing processing on the light emitted by the display panel 220, making the light emitted by the display panel 220 more uniform in shape before it enters the anti-glare layer 212; for example, with Figure 12 For example, the light emitted by the red sub-pixel R, green sub-pixel G, and blue sub-pixel B is uniformly mixed after passing through the light-diffusing layer, and the emitted light is similar to white light that is uniformly mixed with red, green, and blue. When the light-diffusing layer 211 is provided, the light incident on the A1 region of the anti-glare layer 212 includes uniformly mixed red, green, and blue light. The light incident on the B1 region of the anti-glare layer 212 also includes uniformly mixed red, green, and blue light. In this way, when the light emitted by the display panel 220 is incident on the anti-glare layer 212 and scattered by the anti-glare structure 2121, it is not a single light that is scattered, but multiple light rays after light-diffusing. The scattered light is still a mixture of multiple light rays, so the generation of flickering points can be suppressed.

[0076] For example, without a light-diffusing layer, green light is scattered by the anti-glare layer, causing crosstalk with red light. However, with the light-diffusing layer 211, the amount of green, red, and other colored light scattered to the same location increases, preventing noticeable flickering. Due to the presence of the light-diffusing layer 211, the incident light has a wider exit range and exhibits a more uniform light pattern. This means the light pattern after light diffusing no longer has a significant directionality over a larger angle, preventing the anti-glare layer 212 from causing significant light crosstalk and effectively suppressing screen flicker.

[0077] To ensure uniform light mixing before it strikes the anti-glare layer 212, the light-diffusing layer 211 provided in this embodiment generates an outgoing light intensity distribution that satisfies a light intensity attenuation less than or equal to a threshold within a set outgoing angle range when collimated light is incident perpendicularly. For example, combined with Figure 13 , Figure 13 The diagram shows the light intensity distribution of the emitted light from the homogenizing layer provided in the embodiment of this application. The light intensity distribution of the emitted light generated by the collimated light incident perpendicularly on the homogenizing layer is required to have a light intensity attenuation of less than or equal to Y within the range of the emission angle X.

[0078] For example, X ranges from (-2° to +2°) to (-60° to +60°), and Y ranges from 0 to 30%. This means that when collimated light is incident perpendicularly on the homogenizing layer, the intensity of the outgoing light generated is attenuated by less than or equal to 30% within the range of (-2° to +2°) to (-60° to +60°). This allows the light to have a larger outgoing angle after passing through the homogenizing layer, and the light emitted by different pixels can be uniformly mixed after passing through the homogenizing layer.

[0079] like Figure 14 As shown, Figure 14 A comparison diagram of the emitted light intensity of a conventional film layer and the light homogenizing layer provided in the embodiments of this application is shown. Figure 14 As shown in Figure a, the emitted light from a conventional film layer exhibits a clear directionality: the intensity of the emitted light is concentrated near the incident direction (emission angle 0), or the intensity of the emitted light has a significantly higher peak value in the incident direction, and the spot size of the emitted light is relatively small. For example... Figure 14 As shown in Figure b, the light-uniforming layer provided in this embodiment has a significant light-uniforming effect, a large emission angle, and small light intensity attenuation. It can maintain a high light intensity within a large emission angle, and the light spot range of the emitted light is large. In this way, the light spots of different colors emitted by different sub-pixels of the display panel will intersect after passing through the light-uniforming layer. Different light rays can be uniformly mixed without obvious directionality. When the uniformly mixed light passes through the anti-glare layer, it can suppress the generation of screen flicker.

[0080] See Figure 15, Figure 15 A schematic diagram of the homogenizing layer is shown in the embodiment of this application. Figure 15 This is a cross-sectional view of the homogenizing layer in the normal direction. The homogenizing layer 211 includes a filling layer 2112 and a grating 2111 embedded in the filling layer 2112. The filling layer 2112 can be made of a resin-based material and includes a first surface 2112a and a second surface 2112b. The grating 211 includes a plurality of columnar structures 2111a, which can be arranged periodically. In this embodiment, the arrangement period of the columnar structures 2111a is defined as the center distance between two adjacent columnar structures 2111a, denoted as P. The characteristic dimension of the columnar structure 2111a is denoted as D, and the value of D ranges from 1µm to 25µm. The arrangement period of the columnar structures 2111a and the characteristic dimension of the columnar structures 2111a satisfy the following condition: 3D ≥ P > D. For example, when the cross-section of the columnar structure 2111a is circular, its characteristic dimension D refers to the diameter of the circle; when the cross-section of the columnar structure 2111a is square, its characteristic dimension D refers to the side length of the square; when the cross-section of the columnar structure 2111a is rectangular, its characteristic dimension D refers to the diameter of the circumcircle of the rectangle.

[0081] The bottom surface of the columnar structure 2111a is flush with the first surface 2112a of the filling layer 2112, and the height H of the columnar structure 2111a is less than or equal to the thickness L of the light-diffusing layer 211. For example, combined with... Figure 15 The thickness of the uniform light layer 211 is the same as the thickness of the filling layer 2112, and the thickness of the filling layer 2112 is the distance between the first surface 2112a and the second surface 2112b. For example, the refractive index of the grating 2111 is n1, and the refractive index of the filling layer 2112 is n2. The refractive indices of the grating 2111 and the filling layer 2112 satisfy: |n1-n2|>0.005.

[0082] The bottom surface of the columnar structure 2111a is flush with the first surface 2112a of the filling layer 2112. The cross-section of the columnar structure 2111a can be circular, rectangular, or square, etc. The height of the columnar structure 2111a is less than or equal to the thickness of the filling layer 2112. When the height of the columnar structure 2111a is less than the thickness of the filling layer 2112, it can be considered that the grating 2111 is embedded in the filling layer 2112. In this case, during actual use, the grating 2111 (or the first surface 2112a of the filling layer 2112) of the light-diffusing layer 211 is located on the side closer to the light source (i.e., the display panel), and the refractive index n1 of the grating 2111 is greater than the refractive index n2 of the filling layer 2112. In one possible implementation, the refractive index n1 of the grating 2111 and the refractive index n2 of the filling layer 2112 satisfy: n1-n2>0.005.

[0083] When the height of the columnar structure 2111a is equal to the thickness of the filling layer 2112, refer to Figure 16 , Figure 16 As shown in the cross-sectional view of the light-diffusing layer in the normal direction, the grating 2111 can be considered to be embedded in the filling layer 2112 and penetrate through the filling layer 2112. In this case, the lower surface of the columnar structure 2111a is flush with the first surface 2112a of the filling layer 2112, and the upper surface of the columnar structure 2111a is flush with the second surface 2112b of the filling layer 2112. Therefore, such a light-diffusing layer 211 has no direction, and the effect of uniform light mixing can be achieved by either side (e.g., the first surface 2112a or the second surface 2112b of the filling layer 2112) facing the display panel.

[0084] In one possible implementation, the thickness L of the uniform light layer 211 is less than or equal to 150 μm, that is, the thickness of the filling layer 2112 is less than or equal to 150 μm, and correspondingly, the height of the columnar structure 2111a in the grating 2111 is less than or equal to 150 μm.

[0085] The above Figure 15 and Figure 16 In the homogenizing layer 211 shown, the multiple columnar structures 2111a of the grating 2111 are of the same size and height. In some other possible implementations, for example, combined with Figure 17 The heights of the multiple columnar structures 2111a of the grating 2111 can be different. Figure 17 Figures a, b, and c illustrate several different schematic diagrams of the uniform light layer 211. The columnar structures 2111a of the grating 2111 can have different heights, and these columnar structures 2111a of different heights are arranged in a periodic pattern. In this case, multiple columnar structures 2111a of different heights can also be arranged periodically as a whole. Here, the arrangement period of multiple columnar structures 2111a of different heights is denoted as N. For example, the aforementioned period P is the distance between two adjacent columnar structures 2111a, and the period N is the distance between multiple columnar structures 2111a arranged in a periodic pattern, for example, using... Figure 17 Taking Figure b as an example, the four columnar structures 2111a of different heights are arranged periodically, so T=4P.

[0086] Furthermore, the sizes of the multiple columnar structures 2111a of the grating 2111 can be different, see [reference]. Figure 18 , Figure 18 A cross-sectional view of the homogenizing layer in a direction perpendicular to the normal is shown, as follows. Figure 18 As shown in Figure a. Figure 18 Figure a shows a schematic diagram of a homogenizing layer 211. Figure 18In the uniform light layer 211 shown in Figure a, the columnar structures 2111a of the grating 2111 are arranged in a cross-shaped orthogonal arrangement, and the characteristic dimensions of the columnar structures 2111a are the same. Figure 18 Based on Figure a, Figure 18 Figure b shows a schematic diagram of another homogenizing layer 211. Figure 18 In the uniform light layer 211 shown in Figure b, the grating 2111 includes columnar structures 2111a and 2111A with different feature sizes, still arranged in a cross-shaped orthogonal arrangement. The feature size of columnar structure 2111a is D. a The characteristic dimension of columnar structure 2111A is D. A Multiple columnar structures 2111a are arranged around columnar structure 2111A, and at least one columnar structure 2111a can be arranged at equal intervals between any two columnar structures 2111A. The arrangement period P between columnar structures 2111A and columnar structures 2111a satisfies: 3D ≥ P>D, where D can be the average value of the characteristic dimensions of columnar structures 2111A and columnar structures 2111a.

[0087] Please see Figure 19 , Figure 19 This is a cross-sectional view of the homogenizing layer in a direction perpendicular to the normal, such as... Figure 19 As shown in Figure a. Figure 19 Figure a shows a schematic diagram of a homogenizing layer 211. Figure 19 In the uniform light layer 211 shown in Figure a, the columnar structures of the grating 2111 are arranged in a regular hexagonal pattern, and the characteristic dimensions of the columnar structures are the same. Figure 19 Based on Figure a, Figure 19 Figure b shows a schematic diagram of another homogenizing layer 211. Figure 19 In the uniform light layer 211 shown in Figure b, the columnar structures of the grating 2111 have different feature sizes, but are still arranged in a regular hexagonal pattern. Among them, the feature size of the columnar structure 2111a is D. a The characteristic dimension of columnar structure 2111A is D. A Multiple columnar structures 2111a are arranged around columnar structure 2111A, and at least one columnar structure 2111a can be arranged at equal intervals between any two columnar structures 2111A. The arrangement period P between columnar structures 2111A and columnar structures 2111a satisfies: 3D ≥ P>D, where D can be the average value of the characteristic dimensions of columnar structures 2111A and columnar structures 2111a.

[0088] In the above example, the gratings 2111 are arranged periodically. The columnar structure of the gratings 2111 can have the same feature size and height, or the same feature size but different height, or different feature size but the same height, or both feature size and height can be different.

[0089] Furthermore, in some other possible implementations, the columnar structure of the grating 2111 can also be arranged non-periodically. Figure 15 Based on this, refer to Figure 20 , Figure 20 A schematic diagram of another light-diffusing layer 211 is shown. The columnar structure of the grating 2111 can be arranged non-periodically, but it still needs to satisfy that the thickness of the light-diffusing layer 211 is less than or equal to 150 μm, and the height of the columnar structure of the grating 2111 is less than or equal to the thickness of the light-diffusing layer 211. The characteristic size of the columnar structure is 1 µm ~ 25 µm, and the distance between two adjacent columnar structures satisfies the following condition with respect to the characteristic size of the columnar structure: 3D ≥ P>D.

[0090] For example, the light distribution after homogenization by the light homogenizing layer 211 including an aperiodic grating structure is more uniform, and the light intensity attenuation in each direction or angle is smaller; while the light homogenizing layer 211 including a periodic grating structure has better controllability of light homogenization. In this case, the distribution of the light pattern after homogenization at a certain light output angle can be controlled by designing the size of the grating structure, etc.

[0091] The above example is only an exemplary illustration of the structure of the homogenizing layer 211. The homogenizing layer 211 may also include other structures, as long as the output light intensity distribution generated by the homogenizing layer 211 when collimated light is incident perpendicularly satisfies that the light intensity attenuation is less than or equal to a threshold within the set output angle range.

[0092] The anti-glare layer 212 includes an anti-glare structure 2121, such as Figure 21 As shown, the anti-glare structure 2121 includes an uneven microstructure formed on the surface of the anti-glare layer 212. This uneven microstructure is typically arranged in an irregular distribution, but in some other possible implementations, it can also be arranged in a regular distribution. When ambient light shines on this microstructure, it scatters in different directions, preventing glare. The roughness of the anti-glare layer 212 ranges from 0.20 to 0.35 μm, and its haze ranges from 0 to 35%, for example, 20%. A smaller haze range has less impact on the clarity of the display image. The anti-glare value of the anti-glare layer 212 is less than or equal to 10%, and typically, the thickness of the anti-glare layer 212 is less than or equal to 1 mm.

[0093] The light emitted from the display panel 220 is uniformly mixed after passing through the light-diffusing layer 211. The uniformly mixed light is then scattered by the anti-glare layer 212. Since the light emitted from the display panel 220 has already been uniformly mixed before being scattered by the anti-glare layer 212, even if it is scattered by the anti-glare layer 212, it is still based on the uniformly mixed light. Therefore, it can suppress crosstalk between different colors of light that causes screen flicker. This also allows the anti-glare layer 212 to maintain a low haze. For example, in this embodiment, the haze of the anti-glare layer 212 is less than or equal to 35%. The low haze of the anti-glare layer 212 has a smaller impact on the clarity of the display. Therefore, the optical module provided in this embodiment can suppress flicker while maintaining high clarity.

[0094] In one possible implementation, the anti-glare layer 212 can be a glass cover plate. The above-mentioned uneven microstructure morphology can be prepared by chemical etching or spraying anti-glare material on the surface of the glass material to form the anti-glare structure 2121.

[0095] In another possible implementation, the anti-glare layer 212 can also be a composite cover plate, for example, the composite cover plate is based on a thermoplastic material and combines two different materials by hot pressing, so that an interface can be formed on the contact surface of the two different materials, such as polymethyl methacrylate and polycarbonate (PMMA+PC), and an anti-glare structure is made on one side (usually on the PMMA surface), for example, the anti-glare structure 2121 can be made by nanoimprinting or other methods.

[0096] In another possible implementation, the anti-glare layer 212 can also be a film structure. The surface microstructure morphology of the anti-glare film can be made by embossing. The anti-glare film can be pasted onto the screen as needed.

[0097] Based on the optical module provided in the embodiments of this application, the embodiments of this application also provide a display device, see below. Figure 22 , Figure 22 A schematic diagram of the structure of the display device 200 provided in an embodiment of this application is shown.

[0098] The display device 200 includes a display panel 220, a polarizer 230, and an optical module 210 provided in this embodiment. The optical module 210 includes a light-diffusing layer 211 and an anti-glare layer 212. The light-diffusing layer 211 is disposed between the display panel 220 and the polarizer 230, and the anti-glare layer 212 is disposed on the polarizer 230. Different layers of the display device 200 are fixedly bonded together by adhesive layers. For example, an adhesive layer 221c is disposed between the anti-glare layer 212 and the polarizer 230, an adhesive layer 221b is disposed between the polarizer 230 and the light-diffusing layer 211, and an adhesive layer 221a is disposed between the light-diffusing layer 211 and the display panel 220.

[0099] The display panel 220 integrates a substrate, light-emitting devices, and touch elements (e.g., in-cell touch pad or on-cell touch pad), which will not be described in detail in this embodiment. For example, the display panel 220 provided in this application embodiment can be an LCD display panel, or it can also be an OLED display panel, or it can also be a display panel with other structures.

[0100] The light-diffusing layer 211 is a resin-based material with an internal grating. For example, the light-diffusing layer 211 includes a grating and a filling layer, and the refractive index of the grating is different from that of the filling layer. When collimated light is incident perpendicularly, the light intensity distribution generated by the light-diffusing layer satisfies the condition that the light intensity attenuation is less than a threshold within a set emission angle range. For example, in the range of (-2° to +2°), or even in the range of (-60° to +60°), the light intensity attenuation of the emitted light is less than or equal to 30%, thereby enabling uniform light mixing of the light emitted by the display panel 220.

[0101] The 230 polarizer can be a circular polarizer (used in OLED display architecture) or a linear polarizer (used in LCD display architecture).

[0102] Above the polarizer 230 is an anti-glare layer 212, which includes an anti-glare structure 2121. The anti-glare structure 2121 refers to the uneven microstructure morphology on the surface of the anti-glare layer 212. These microstructure morphologies can cause diffuse reflection of incident ambient light, avoiding glare on the screen. Since a light-diffusing layer 211 is provided under the anti-glare layer 212, the light emitted from the display panel 220 is uniformly mixed by the light-diffusing layer 211 before entering the anti-glare layer 212. In this way, when the uniformly mixed light is scattered by the anti-glare layer 212, crosstalk between different light rays can be avoided, which could cause screen flicker.

[0103] The above Figure 22 In the example shown, the homogenizing layer 212 is positioned below the polarizer 230. For another possible implementation, see [link to relevant documentation]. Figure 23 As shown, this application embodiment also provides another display device 200, which differs from the display device provided in the previous example in that the light-diffusing layer 211 can also be disposed above the polarizer 230.

[0104] The display device 200 includes a display panel 220, a polarizer 230, and an optical module 210 provided in this embodiment. The optical module 210 includes a light-diffusing layer 211 and an anti-glare layer 212, wherein the light-diffusing layer 211 is disposed on the polarizer 230, and the anti-glare layer 212 is disposed on the light-diffusing layer 211. Different layers of the display device 200 are fixedly bonded together by adhesive layers. For example, an adhesive layer 221c is disposed between the anti-glare layer 212 and the light-diffusing layer 211, an adhesive layer 221b is disposed between the light-diffusing layer 211 and the polarizer 230, and an adhesive layer 221a is disposed between the polarizer 230 and the display panel 220.

[0105] Since the structure and principle of the display device 200 provided in this application embodiment for suppressing glare and flicker are basically the same as those in the previous examples, the only difference is the position of the polarizer 230, which will not be described in detail here.

[0106] In the aforementioned example, the display panel 200 integrates a touch element. In some other possible implementations, the touch element cannot be integrated into the display panel. For example, this application also provides a display device, such as... Figure 24 As shown, the display device 200 includes a display panel 220, a light-diffusing layer 211, a touch circuit layer 240, a polarizer 230, and an anti-glare layer 212. Adhesive layers are provided between different layers to fix and bond them together. For example, an adhesive layer 221d is provided between the anti-glare layer 212 and the polarizer 230, an adhesive layer 221c is provided between the polarizer 230 and the touch circuit layer 240, an adhesive layer 221b is provided between the touch circuit layer 240 and the light-diffusing layer 211, and an adhesive layer 221a is provided between the light-diffusing layer 211 and the display panel 220.

[0107] The display device 200 provided in this application embodiment includes a light-diffusing layer 211 and an anti-glare layer 212. The anti-glare layer 211 includes an anti-glare structure 2121, which refers to the uneven microstructure morphology on the surface of the anti-glare layer 212. These microstructure morphologies allow incident ambient light to undergo diffuse reflection, preventing screen glare. The light-diffusing layer 211 is used to uniformly mix the light emitted from the display panel 220. When the uniformly mixed light is incident on the anti-glare layer 212 and scattered by the anti-glare layer 212, crosstalk between different light rays can be avoided, preventing screen flicker.

[0108] In the aforementioned example, the display device includes a polarizer. With the development of display technology, the industry has recently developed Color Filter on Encapsulation (COE) technology, also known as polarizer-free technology. COE technology is gradually gaining favor in the industry. Integrating the color filter layer using COE achieves the purpose of polarizer-free (POL-Less), which helps to reduce the overall thickness of the display device and improve its brightness.

[0109] Based on this, the embodiments of this application also provide another display device, see below. Figure 25 , Figure 25 A schematic diagram of the structure of the display device 200 provided in an embodiment of this application is shown.

[0110] The display device 200 includes a display panel 220, a light-diffusing layer 211, and an anti-glare layer 212. Adhesive layers are provided between different layers to fix and bond them together. For example, an adhesive layer 221b is provided between the anti-glare layer 212 and the light-diffusing layer 211, and an adhesive layer 221a is provided between the light-diffusing layer 211 and the display panel 220.

[0111] The main difference between this embodiment and the previous example is that this embodiment omits the polarizer. The display device 200 provided in this embodiment is mainly used in a display architecture equipped with COE technology, and its display panel 220 integrates a substrate, light-emitting devices, a color filter, and touch elements.

[0112] The principle of suppressing glare and flicker in the display device 200 provided in this application embodiment is basically the same as that in the aforementioned examples. For example, the display device 200 provided in this application embodiment includes a light-diffusing layer 211 and an anti-glare layer 212. The anti-glare layer 212 includes an anti-glare structure 2121, which refers to the uneven microstructure morphology on the surface of the anti-glare layer 212. These microstructure morphologies allow ambient light incident on the anti-glare layer 212 to undergo diffuse reflection, preventing glare from appearing on the screen. The light-diffusing layer 211 is used to uniformly mix the light emitted from the display panel 220. When the uniformly mixed light is incident on the anti-glare layer 212 and scattered by the anti-glare layer 212, crosstalk between different light rays can be avoided, preventing screen flicker.

[0113] This application also provides a display device 300, see reference. Figure 26 The display device 300 includes a housing 310 and the display device 200 provided in the foregoing example. The display device 200 is mounted on the housing 310, which supports and protects the display device 200.

[0114] For example, the display device 300 can be any device with display function, such as a monitor, a television, etc.

[0115] This application also provides an electronic device, which can be as described above. Figure 1 The electronic device shown includes a processor and a display device provided in the foregoing example. The display device is connected to the processor and is used to display information.

[0116] For example, an electronic device can be a mobile phone, tablet computer, personal computer, television, smart wearable device, or any electronic device with display function.

[0117] Those skilled in the art will recognize that, in one or more of the examples above, the functions described in this application can be implemented using hardware, software, firmware, or any combination thereof. When implemented in software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium accessible to a general-purpose or special-purpose computer.

[0118] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An optical module, characterized in that, The optical module is applied to a display device, the display device includes a display panel, and the optical module includes a light-diffusing layer and an anti-glare layer sequentially disposed in the light-emitting direction of the display panel; When collimated light is incident perpendicularly, the outgoing light intensity distribution generated by the homogenizing layer satisfies the condition that the light intensity attenuation is less than or equal to a first threshold within a set outgoing angle range. The set range of launch angles includes to ; The light intensity attenuation refers to the attenuation of the light intensity of the emitted light relative to the light intensity of the emitted light when the emission angle is 0, wherein the first threshold is less than or equal to 30%; The thickness of the homogenizing layer is less than or equal to 150 μm; The haze of the anti-glare layer is less than or equal to a second threshold, and the second threshold is less than or equal to 35%.

2. The optical module according to claim 1, characterized in that, The haze of the anti-glare layer is greater than or equal to 20%.

3. The optical module according to claim 1 or 2, characterized in that, The roughness of the anti-glare layer is 0.2 μm to 0.35 μm.

4. The optical module according to any one of claims 1 to 3, characterized in that, The homogenizing layer includes a filling layer and a grating embedded between the filling layers, wherein the refractive index of the grating is different from that of the filling layer.

5. The optical module according to claim 4, characterized in that, The refractive index of the grating and the refractive index of the filling layer satisfy the following condition: |n1-n2|>0.005, where n1 is the refractive index of the grating and n2 is the refractive index of the filling layer.

6. The optical module according to claim 4, characterized in that, The grating is an n-dimensional grating, where the value of n is greater than or equal to 2.

7. The optical module according to claim 4, characterized in that, The filling layer covers the side of the grating away from the display panel.

8. The optical module according to claim 7, characterized in that, The refractive index of the grating and the refractive index of the filling layer satisfy the condition: n1-n2>0.005, where n1 is the refractive index of the grating and n2 is the refractive index of the filling layer.

9. The optical module according to any one of claims 4 to 8, characterized in that, The grating comprises multiple columnar structures, and the center distance between any two columnar structures and the feature size of the columnar structure satisfy: 3D ≥ P>D, where D is the feature size of the columnar structure and P is the center distance between any two columnar structures.

10. The optical module according to any one of claims 1 to 9, characterized in that, The anti-glare value of the anti-glare layer is less than or equal to 10%.

11. The optical module according to any one of claims 1 to 9, characterized in that, The thickness of the anti-glare layer is less than or equal to 1 mm.

12. A display device, characterized in that, The display device includes a display panel, a polarizer, and an optical module as described in any one of claims 1 to 11. The optical module includes a light-diffusing layer and an anti-glare layer. The polarizer, the light-diffusing layer, and the anti-glare layer are arranged sequentially in the light-emitting direction of the display panel, or the light-diffusing layer, the polarizer, and the anti-glare layer are arranged sequentially in the light-emitting direction of the display panel.

13. The display device according to claim 12, characterized in that, The display device further includes a touch circuit layer, which is disposed between the light-diffusing layer and the polarizer.

14. The display device according to claim 12 or 13, characterized in that, The display device also includes a touch circuit, which is integrated on the display panel.

15. A display device, characterized in that, The display device includes a display panel and an optical module as described in any one of claims 1 to 11. The optical module includes a light-diffusing layer and an anti-glare layer. A color filter is disposed on the display panel, and the light-diffusing layer and the anti-glare layer are disposed sequentially in the light-emitting direction of the display panel.

16. A display device, characterized in that, The device includes a housing and a display device as described in any one of claims 12 to 15, wherein the display device is mounted on the housing and the housing is used to support and protect the display device.

17. An electronic device, characterized in that, The electronic device includes a processor and a display device as described in any one of claims 12 to 15, wherein the display device is electrically connected to the processor.

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