Display module and display device

Abstract

The application provides a display module and a display device, and relates to the technical field of display, and can reduce the risk of producing glare. The display module comprises a display panel and an anti-glare substrate, the display panel has a light-emitting surface and a back surface, and the anti-glare substrate is arranged on the light-emitting surface side of the display panel. The anti-glare substrate comprises a substrate, a first laminated structure and a second laminated structure, and the first laminated structure and the second laminated structure are arranged on opposite sides of the substrate respectively. The first laminated structure comprises a plurality of high-refractive-index film layers and at least one low-refractive-index film layer, and the plurality of high-refractive-index film layers and the at least one low-refractive-index film layer included in the first laminated structure are alternately and laminatedly arranged on one side of the substrate. The second laminated structure comprises a plurality of high-refractive-index film layers and at least one low-refractive-index film layer, and the plurality of high-refractive-index film layers and the at least one low-refractive-index film layer included in the second laminated structure are alternately and laminatedly arranged on the other side of the substrate. The application is used for manufacturing the display device.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display module and display device. Background Technology

[0002] Vehicles (such as cars and trucks) all include rearview mirrors and headlights. Rearview mirrors include interior rearview mirrors (head-up mirrors) located inside the vehicle and exterior rearview mirrors. In some vehicles, the interior rearview mirror is a display screen (in-vehicle rearview monitor). When the vehicle is in normal driving mode, the rearview mirror monitor functions as a reflector, allowing the driver to observe road conditions behind the vehicle. When reversing, the rearview mirror monitor connects to a reversing camera system and acts as a display, showing road conditions behind the vehicle to assist the driver in reversing and parking. Rearview mirror monitors can be LCD or OLED displays, among others.

[0003] When driving at night, vehicles turn on their headlights to enhance the driver's visibility. However, if there is a vehicle traveling in the same direction behind the vehicle with its headlights on, especially high beams, the light from the following vehicle will reflect off the rearview mirror of the vehicle in front and shine into the eyes of the driver of the vehicle in front, causing glare and affecting the safe driving of the vehicle in front, thus increasing the safety hazard.

[0004] Therefore, the design challenge of rearview mirror displays lies in how to reduce the impact of taillights on the driver while ensuring the lowest possible reflectivity (so that the driver can clearly see the road conditions behind the vehicle during the day) and thus increasing the driver's safety at night. Summary of the Invention

[0005] Embodiments of this disclosure provide a display module and display device that can reduce the risk of glare for drivers.

[0006] To achieve the above objectives, the embodiments of this disclosure adopt the following technical solutions:

[0007] On one hand, embodiments of this disclosure provide a display module, including a display panel and an anti-glare substrate. The display panel has a light-emitting surface and a backlight surface, and the anti-glare substrate is disposed on one side of the light-emitting surface of the display panel. The anti-glare substrate includes a substrate, a first stacked structure, and a second stacked structure, which are respectively disposed on opposite sides of the substrate. The first stacked structure includes multiple high-refractive-index films and at least one low-refractive-index film, which are alternately stacked on one side of the substrate. The second stacked structure includes multiple high-refractive-index films and at least one low-refractive-index film, which are alternately stacked on the other side of the substrate. The film layer furthest from the substrate and the film layer closest to the substrate in the first stacked structure are both high-refractive-index films; the film layer furthest from the substrate and the film layer closest to the substrate in the second stacked structure are both high-refractive-index films.

[0008] In some embodiments, the first stacked structure and the second stacked structure have the same number of film layers.

[0009] In some embodiments, the thickness of the high refractive index film is 10 nm to 45 nm; and / or, the thickness of the low refractive index film is 80 to 120 nm.

[0010] In some embodiments, the high refractive index film has a refractive index of 2 to 2.5 for visible light; and / or, the low refractive index film has a refractive index of 1.3 to 1.5 for visible light.

[0011] In some embodiments, the high refractive index film is made of one or more of titanium dioxide, niobium pentoxide, and tantalum pentoxide; and / or the low refractive index film is made of silicon dioxide and / or magnesium fluoride.

[0012] In some embodiments, both the first stacked structure and the second stacked structure include three film layers along a direction perpendicular to the substrate and away from the substrate, wherein the three film layers are, in sequence, a first high refractive index film layer, a first low refractive index film layer, and a second high refractive index film layer.

[0013] In some embodiments, the ratio of the thickness of the first high refractive index film to the thickness of the second high refractive index film is within 2 / 7 to 4 / 7; the ratio of the thickness of the first high refractive index film to the thickness of the first low refractive index film is within 1 / 10 to 1 / 5.

[0014] In some embodiments, the first high refractive index film is made of titanium dioxide and has a thickness of (15±2) nm; the first low refractive index film is made of silicon dioxide and has a thickness of (100±2) nm; and the second high refractive index film is made of titanium dioxide and has a thickness of (35±2) nm.

[0015] On the other hand, a display module is provided, including a display panel and an anti-glare substrate. The display panel has a light-emitting surface and a backlight surface; the anti-glare substrate is disposed on one side of the light-emitting surface of the display panel. The anti-glare substrate includes a substrate and two stacked structures, which are respectively disposed on opposite sides of the substrate; each stacked structure includes a plurality of high-refractive-index films and at least one low-refractive-index film, the plurality of high-refractive-index films and the at least one low-refractive-index film are alternately stacked on the substrate, and the film closest to the substrate and the film farthest from the substrate in the stacked structure are both high-refractive-index films. The thickness of each high-refractive-index film is 10nm~45nm, and the refractive index of the high-refractive-index film to visible light is 2~2.5; and / or, the thickness of each low-refractive-index film is 80nm~120nm, and the refractive index of the low-refractive-index film to visible light is 1.3~1.5.

[0016] The anti-glare substrate included in the display module provided in this disclosure has different transmittance and reflectance for different wavelengths of light when light shines on it. Utilizing this characteristic, the transmittance of yellow-green light is made greater than that of blue-violet light (while the reflectance of blue-violet light is greater than that of yellow-green light), thus increasing the proportion of blue-violet light reflection and decreasing the proportion of yellow-green light reflection while maintaining an overall reflectance greater than 40% (reflecting blue-violet light as much as possible and reducing the reflectance of yellow-green light). Since the human eye is less sensitive to blue-violet light than to yellow-green light, this reduces the degree and likelihood of glare for the driver (human eye). Simultaneously, the overall reflectance of the anti-glare substrate is greater than 40%, ensuring that it does not affect the driver's ability to observe road conditions behind the vehicle during the day.

[0017] In another aspect, a display device is provided, comprising the display module described in any of the above embodiments.

[0018] In some embodiments, the display device further includes a circular polarizer and an optical adhesive. The circular polarizer is disposed between the display panel of the display module and the anti-glare substrate; the optical adhesive is disposed between the circular polarizer and the anti-glare substrate for bonding the circular polarizer and the anti-glare substrate.

[0019] The display device provided in the embodiments of this disclosure includes the display module described in any of the foregoing embodiments. For the same reasons as the display module, the display device can reduce the degree and likelihood of glare for the driver (human eye), thereby improving the safety of the driver while driving at night. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0021] Figure 1 This is a structural diagram of a display device according to some embodiments;

[0022] Figure 2 for Figure 1 Sectional view of AA;

[0023] Figure 3 The reflectivity of an anti-glare substrate for different wavelengths of light according to some embodiments;

[0024] Figure 4 The reflectivity of another anti-glare substrate according to some embodiments for light of different wavelengths;

[0025] Figure 5 The reflectivity of optical substrates for different wavelengths of light is shown in the figure.

[0026] Figure 6 This table compares the light reflectivity of different film structures. Detailed Implementation

[0027] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0028] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0029] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0030] "One or more of A, B and C" includes the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0031] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0032] As used herein, “approximately” includes the value stated and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0033] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and regions is enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched regions shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0034] In related technologies, the following two solutions are typically used to address the problem of drivers being dazzled by the strong headlights of vehicles behind them.

[0035] One method involves attaching a semi-transparent, semi-reflective film (or adding an external mirrored Al glass cover) to the surface of the car rearview mirror display, and then applying a layer of blue film. However, the blue film has poor abrasion resistance, is prone to wear, and is easily damaged during application. Furthermore, bonding two layers of film (semi-transparent, semi-reflective film and blue film) to the surface of the rearview mirror display reduces its light emission efficiency and causes ghosting, resulting in a poor image display.

[0036] Research has shown that, under normal circumstances, the visible light wavelengths perceptible to the human eye range from 400 to 780 nm. However, different wavelengths of light elicit different sensitivities in the human eye. The human eye is most efficient at perceiving yellow-green light with a wavelength of 555 nm, while its sensitivity to blue light is relatively low. For example, at the same brightness, the human eye perceives light in the 500 nm to 600 nm wavelength range as having higher brightness, while it perceives light in the 400 nm to 500 nm wavelength range as having lower brightness. In other words, yellow-green light (wavelength 500 nm to 600 nm) is the light to which the human eye is most sensitive, while blue-violet light (wavelength 400 nm to 500 nm) is the light to which the human eye is most adapted. Brightness refers to the visual perception of the luminance of a light wave.

[0037] See Figure 1 Some embodiments of this disclosure provide a display device 1000, which can be any head-up display such as a vehicle rearview display, streaming media rearview mirror, smart rearview mirror, or dashcam, or any product or component with display function such as a television, monitor, laptop, tablet, mobile phone, or navigator.

[0038] The display device 100 can be a liquid crystal display (LCD); it can also be an electroluminescent display device or a photoluminescent display device. If the display device is an electroluminescent display device, it can be an organic light-emitting diode (OLED) or a quantum dot light-emitting diode (QLED). If the display device is a photoluminescent display device, it can be a quantum dot photoluminescent display device.

[0039] See Figure 2 The display device 1000 provided in the embodiments of this disclosure includes a display module 100, which includes a display panel 10 and an anti-glare substrate 20 stacked together.

[0040] For example, when the display device 1000 is an OLED display device, the display panel 10 includes a substrate 11, an array substrate 12, a light-emitting functional layer 13, and an encapsulation layer 14 stacked together; wherein, the light-emitting functional layer includes a plurality of sub-pixels 131, and the sub-pixels 131 include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B.

[0041] The display panel 10 has a light-emitting surface and a backlight surface; wherein, the light-emitting surface refers to the surface of the display panel 10 used to display image information ( Figure 2 The upper surface of the display panel 10), the backlight surface refers to the surface of the display panel 10 opposite to the light-emitting surface (the upper surface of the display panel 10). Figure 2 (Lower surface of the display panel 10). The anti-glare substrate 20 is disposed on the light-emitting side of the display panel 10.

[0042] See Figure 2 The anti-glare substrate 20 includes a substrate 1, a first stacked structure 2, and a second stacked structure 3, which are respectively disposed on opposite sides of the substrate 1. The first stacked structure 2 includes multiple high-refractive-index film layers H and at least one low-refractive-index film layer L. The multiple high-refractive-index film layers H and at least one low-refractive-index film layer L included in the first stacked structure 2 are alternately stacked on one side of the substrate 1. The second stacked structure 3 includes multiple high-refractive-index film layers H and at least one low-refractive-index film layer L. The multiple high-refractive-index film layers H and at least one low-refractive-index film layer L included in the second stacked structure 3 are alternately stacked on the other side of the substrate 1. The film layer furthest from the substrate 1 and the film layer closest to the substrate 1 in the first stacked structure 2 are both high-refractive-index film layers H; the film layer furthest from the substrate 1 and the film layer closest to the substrate 1 in the second stacked structure 3 are both high-refractive-index film layers H.

[0043] For example, see Figure 2 On either side of the substrate 1, along a direction perpendicular to and away from the substrate 1, the anti-glare substrate 20 sequentially includes a high refractive index film layer H, a low refractive index film layer L, another high refractive index film layer H, a third low refractive index film layer L, ..., a fourth high refractive index film layer H; wherein, Figure 2 The example only shows two high-refractive-index film layers H and one low-refractive-index film layer L, but the number of film layers can be increased.

[0044] The anti-glare substrate 20 included in the display module 100 provided in this disclosure has different transmittance and reflectance for different wavelengths of light when light shines on it. Utilizing this characteristic, the transmittance and reflectance of the anti-glare substrate 20 for different wavelengths of light can be increased so that the transmittance of yellow-green light is greater than that of blue-violet light (and the reflectance of blue-violet light is greater than that of yellow-green light). This allows the anti-glare substrate 20 to increase the proportion of blue-violet light reflection and decrease the proportion of yellow-green light reflection while maintaining an overall reflectance (full-band reflectance) of greater than 40% (reflecting blue-violet light as much as possible and reducing the reflectance of yellow-green light). Since the human eye is less sensitive to blue-violet light than to yellow-green light, this reduces the degree and likelihood of glare for the driver (human eye). Simultaneously, the overall reflectance of the anti-glare substrate 20 is greater than 40%, so it will not affect the driver's ability to observe road conditions behind the vehicle during the day.

[0045] In some embodiments, the first stacked structure 2 and the second stacked structure 3 have the same number of film layers; that is, the number of high refractive index film layers H contained in the first stacked structure 2 is the same as the number of high refractive index film layers H contained in the second stacked structure 3; the number of low refractive index film layers L contained in the first stacked structure 2 is the same as the number of low refractive index film layers L contained in the second stacked structure 3.

[0046] In some embodiments, the first stacked structure 2 and the second stacked structure 3 are symmetrically arranged about the substrate 1; that is, the high-refractive-index film layer H and the low-refractive-index film layer L corresponding to each other in the first stacked structure 2 and the second stacked structure 3 have the same material and thickness. The symmetrical arrangement of the first stacked structure 2 and the second stacked structure 3 about the substrate 1 is beneficial to enhance the reflectivity of the anti-glare substrate 20 and increase the reflection ratio of blue-violet light, thereby improving the anti-glare capability of the anti-glare substrate. The high-refractive-index film layer H and the low-refractive-index film layer L included in the first stacked structure 2 and the second stacked structure 3 are sequentially numbered along a direction perpendicular to and away from the substrate 1, where "corresponding to each other" means that the high-refractive-index film layer H and the low-refractive-index film layer L have the same number.

[0047] For example, the high-refractive-index film H and low-refractive-index film L contained in the first stacked structure 2 and the second stacked structure 3 are sequentially numbered as follows: first high-refractive-index film H1, first low-refractive-index film L1, second high-refractive-index film H2, second low-refractive-index film L2, ..., Nth high-refractive-index film HN, first low-refractive-index film LN, and N+1th high-refractive-index film H (N+1). The Mth high-refractive-index film HM contained in the first stacked structure 2 corresponds to the Mth high-refractive-index film HM contained in the second stacked structure 3, where M is a positive integer greater than or equal to 1 and less than or equal to N+1; the Qth low-refractive-index film LQ contained in the first stacked structure 2 corresponds to the Qth low-refractive-index film LQ contained in the second stacked structure 3, where Q is a positive integer greater than or equal to 1 and less than or equal to N.

[0048] In some embodiments, the thickness of the high-refractive-index film H is 10 nm to 45 nm; and / or, the thickness of the low-refractive-index film L is 80 nm to 120 nm. Simulation experiments have verified that when the thickness of the high-refractive-index film H is 10 nm to 45 nm; and / or the thickness of the low-refractive-index film L is 80 nm to 120 nm, the reflectivity of the anti-glare substrate 20 across the entire wavelength band is greater than 40%, and the reflectivity of blue-violet light is greater than that of yellow-green light, which is beneficial for improving the anti-glare capability of the anti-glare substrate. For example, the thickness of the high-refractive-index film H can be 10 nm, 20 nm, 45 nm, etc., and will not be listed here; the thickness of the low-refractive-index film L can be 80 nm, 100 nm, 120 nm, etc., and will not be listed here.

[0049] In some embodiments, the high refractive index film H has a refractive index of 2 to 2.5 for visible light; and / or, the low refractive index film L has a refractive index of 1.3 to 1.5 for visible light. Simulation experiments have verified that when the high refractive index film H has a refractive index of 2 to 2.5 for visible light; and / or the low refractive index film L has a refractive index of 1.3 to 1.5 for visible light, the anti-glare substrate 20 has a reflectivity greater than 40% across the entire wavelength range, and the reflectivity of blue-violet light is greater than that of yellow-green light, thus reducing the risk of glare for drivers. For example, the refractive index of the high refractive index film H for visible light can be 2, 2.3, 2.5, etc., and will not be listed here; the refractive index of the low refractive index film can be 1.3, 1.35, 1.4, 1.5, etc., and will not be listed here.

[0050] Computer simulation analysis shows that when the thickness of the high refractive index film H is 10nm~45nm and the refractive index of visible light is 2~2.5, and the thickness of the low refractive index film L is 80~120nm and the refractive index of visible light is 1.3~1.5, the anti-glare substrate 20 has a higher reflectivity for blue-violet light than for yellow-green light, which can reduce the risk of glare for drivers.

[0051] In some embodiments, the material of the high refractive index film H includes one or more of titanium dioxide, niobium pentoxide, and tantalum pentoxide; and / or the material of the low refractive index film L includes silicon dioxide and / or magnesium fluoride.

[0052] In some embodiments, substrate 1 is a rigid substrate or a flexible substrate. For example, a rigid substrate can be a glass substrate, and a flexible substrate can be a resin substrate. When substrate 1 is a rigid substrate, the anti-glare substrate 20 has higher structural strength and stability, and is less prone to deformation. When substrate 1 is a flexible substrate, the anti-glare substrate 20 can deform to a certain extent, which is beneficial for the anti-glare substrate to adhere to the display panel 10. For example, the display panel 10 included in the display module 100 can be a rigid display panel or a flexible display panel; when the display panel 10 is a rigid display panel, substrate 1 can be a rigid substrate or a flexible substrate; when the display panel 10 is a flexible display panel, substrate 1 can be a flexible substrate.

[0053] In some embodiments, see Figure 2 Both the first stacked structure 2 and the second stacked structure 3 include three film layers. Along a direction perpendicular to the substrate 1 and away from the substrate 1, the three film layers are, in sequence, a first high refractive index film layer H1, a first low refractive index film layer L1, and a second high refractive index film layer H2. As the thickness of the film layers included in the first stacked structure 2 and the second stacked structure 3 increases, the reflectivity of the anti-glare substrate 20 for each wavelength of light gradually increases, while the transmittance for each wavelength of light gradually decreases. Since both the first stacked structure 2 and the second stacked structure 3 include three film layers, the impact of the anti-glare substrate 20 on the light emission efficiency of the display module 100 can be reduced.

[0054] When both the first stacked structure 2 and the second stacked structure 3 include three film layers, the ratio of the thickness of the first high-refractive-index film layer to the thickness of the second high-refractive-index film layer is within 2 / 7 to 4 / 7; the ratio of the thickness of the first high-refractive-index film layer to the thickness of the first low-refractive-index film layer is within 1 / 10 to 1 / 5. Simulation experiments have verified that when the ratio of the thickness of the first high-refractive-index film layer H1 to the thickness of the second high-refractive-index film layer H2 is within 2 / 7 to 4 / 7, and the ratio of the thickness of the first high-refractive-index film layer H1 to the thickness of the first low-refractive-index film layer L1 is within 1 / 10 to 1 / 5, the anti-glare substrate 20 has a full-band reflectivity greater than 40%, and the reflectivity of blue-violet light is greater than that of yellow-green light, thus effectively reducing the risk of glare for drivers.

[0055] For example, the first high-refractive-index film H1 is made of titanium dioxide (TiO2) with a thickness of approximately (15±2) nm; the first low-refractive-index film L1 is made of silicon dioxide (SiO2) with a thickness of approximately (100±2) nm; and the second high-refractive-index film H2 is made of titanium dioxide (TiO2) with a thickness of approximately (35±2) nm. Here, "±2" refers to the reasonable fluctuation within a certain range due to manufacturing precision and measurement errors around the selected thickness value for each film. Of course, the fluctuation range could also be "±1" or "±5", etc., which will not be listed here.

[0056] See Figure 3 , Figure 3 The substrate 1 is a rigid substrate (glass substrate) with a thickness of 0.5 mm and a refractive index of 1.52, and the parameters (thickness, material) of each film layer included in the anti-glare substrate 20 are as follows: Figure 6 The first row of data (row number 1; the material of the first high refractive index film H1 is titanium dioxide (TiO2), with a thickness of 15nm; the material of the first low refractive index film L1 is silicon dioxide (SiO2), with a thickness of 100nm; the material of the second high refractive index film H2 is titanium dioxide (TiO2), with a thickness of 35nm) shows the reflectivity curves of the anti-glare substrate 20 for different wavelengths of light. The graph shows that the anti-glare substrate 20 has a higher reflectivity for blue-violet light (wavelength 400nm~500nm) than for yellow-green light (wavelength 500nm~600nm). See also... Figure 6 It can be seen that the anti-glare substrate 20 has a reflectivity of approximately 72.00% for blue-violet light and approximately 50.07% for yellow-green light. This shows that the anti-glare substrate 20 has a higher reflectivity for blue-violet light than for yellow-green light, which can reduce the degree and likelihood of glare for the driver (human eye) and improve driver safety at night. Simultaneously, the anti-glare substrate 20 has a reflectivity of approximately 45.51% across the entire wavelength range (light wavelength from 400nm to 780nm), which meets the requirements of the People's Republic of China National Standard, Performance and Installation Requirements for Rearview Mirrors of Motor Vehicles (GB 15084-2006), which stipulates that the reflectivity of interior rearview mirrors of motor vehicles should be ≥ 40% during the day. The transmittance across the entire wavelength range is approximately 54.46%, and the light emission efficiency of the display panel 10 is sufficient to meet the requirements for displaying image information.

[0057] See Figure 4 , Figure 4 The substrate 1 is a flexible substrate (PI substrate) with a thickness of 0.5 mm and a refractive index of 1.54, and the parameters (thickness, material) of each film layer included in the anti-glare substrate 20 are as follows: Figure 6The second row of data (row number 2; the material of the first high refractive index film H1 is titanium dioxide (TiO2), with a thickness of 15nm; the material of the first low refractive index film L1 is silicon dioxide (SiO2), with a thickness of 100nm; the material of the second high refractive index film H2 is titanium dioxide (TiO2), with a thickness of 35nm) shows the reflectivity curves of the anti-glare substrate 20 for light of different wavelengths. As can be seen from the figure, the anti-glare substrate 20 has a higher reflectivity for blue-violet light (wavelength 400nm~500nm) than for yellow-green light (wavelength 500nm~600nm). See also... Figure 6 It can be seen that the anti-glare substrate 20 has a reflectivity of approximately 71.89% for blue-violet light and approximately 50.42% for yellow-green light. This shows that the anti-glare substrate 20 has a higher reflectivity for blue-violet light than for yellow-green light, which can reduce the degree and likelihood of glare for the driver (human eye), improving driver safety at night. Simultaneously, the anti-glare substrate 20 has a reflectivity of approximately 45.79% across the entire wavelength range (400nm~780nm), meeting the requirements of the People's Republic of China National Standard, Performance and Installation Requirements for Rearview Mirrors of Motor Vehicles (GB 15084-2006), which stipulates that the reflectivity of interior rearview mirrors of motor vehicles should be ≥ 40% during the day. The transmittance across the entire wavelength range is approximately 52.70%, indicating that the light emission efficiency of the display panel 10 is sufficient to meet the requirements for displaying image information.

[0058] The embodiments of this disclosure also provide a set of comparative examples, see below. Figure 5 , Figure 5 Substrate 1 is a rigid substrate (glass substrate) with a thickness of 0.5 mm and a refractive index of 1.52. A high refractive index film H and a low refractive index film L are stacked only on one side (single side) of substrate 1. The materials and thicknesses of each film layer are as follows: Figure 6 The data in the third row (row number 3; the first high-refractive-index film H1 is made of titanium dioxide (TiO2) with a thickness of 15 nm; the first low-refractive-index film L1 is made of silicon dioxide (SiO2) with a thickness of 100 nm; the second high-refractive-index film H2 is made of titanium dioxide (TiO2) with a thickness of 35 nm) shows the reflectance curves of the optical device for different wavelengths of light; (Compare) Figure 3 and Figure 5 and combined Figure 6 A comparison shows that when a multilayer structure is set on one side of substrate 1, its full-band reflectivity is less than 40%, which does not meet industry standards. The anti-glare substrate 20 provided in this embodiment can increase the reflectivity of blue-violet light and reduce the reflectivity of yellow-green light while meeting industry standards (daytime visible light reflectivity ≥40%), thereby reducing the degree and possibility of glare for the driver (human eye) and improving the safety of the driver when driving at night.

[0059] Some embodiments of this disclosure also provide a display module 100, including a display panel 10 and an anti-glare substrate 20. The display panel 10 has a light-emitting surface and a backlight surface; the anti-glare substrate 20 is disposed on the light-emitting surface side of the display panel 10.

[0060] See Figure 2 The anti-glare substrate 20 includes a substrate 1 and two stacked structures (a first stacked structure 2 and a second stacked structure 3), which are respectively disposed on opposite sides of the substrate 1. Each stacked structure includes multiple high-refractive-index film layers H and at least one low-refractive-index film layer L. The multiple high-refractive-index film layers H and at least one low-refractive-index film layer L are alternately stacked on the substrate 1, and the film layer farthest from the substrate 1 is the high-refractive-index film layer H. The thickness of each high-refractive-index film layer is 10 nm to 45 nm, and the refractive index of the high-refractive-index film layer H for visible light is 2 to 2.5; and / or, the thickness of each low-refractive-index film layer L is 80 nm to 120 nm, and the refractive index of the low-refractive-index film layer for visible light is 1.3 to 1.5.

[0061] The display module 100 provided in this embodiment has an anti-glare substrate 20 disposed on one side of the light-emitting surface of the display panel 10. The anti-glare substrate 20 has a higher reflectivity for blue-violet light than for yellow-green light, and the proportion of blue-violet light reflected by the anti-glare substrate 20 is greater than the proportion of yellow-green light. Since the human eye is less sensitive to blue-violet light than to yellow-green light, under the premise that the overall reflectivity of the anti-glare substrate 20 is greater than 40%, the degree and possibility of glare for the driver (human eye) can be reduced, thereby improving the safety of the driver when driving at night.

[0062] See Figure 1 Some embodiments of this disclosure also provide a display device 1000, including the display module 100 described in any of the above embodiments. For the same reasons as the display panel 10, the display device 1000, with an overall reflectivity of the anti-glare substrate 20 greater than 40%, can reduce the degree and possibility of glare for the driver (human eye), thereby improving the safety of the driver when driving at night.

[0063] In some embodiments, see Figure 2 The display device 1000 further includes an adhesive layer 30, a circular polarizer 40, and an optical adhesive 50. The adhesive layer 30 is disposed on the light-emitting surface of the display panel 10, and the circular polarizer 40 is disposed on the side of the adhesive layer 30 away from the display panel 10, for bonding the display panel 10 and the circular polarizer 40. The optical adhesive 50 is disposed between the circular polarizer 40 and the anti-glare substrate 20, for bonding the circular polarizer 40 and the anti-glare substrate 20. The circular polarizer 40 can reduce the reflection on the surface of the display panel 10 and prevent color separation from occurring on the surface of the display panel 10.

[0064] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display module, characterized by The display module comprises: a display panel having a light-emitting surface and a back surface; an anti-glare substrate arranged on the light-emitting surface side of the display panel; the anti-glare substrate comprises a substrate, a first laminated structure and a second laminated structure, the first laminated structure and the second laminated structure are respectively arranged on the opposite sides of the substrate; wherein the first laminated structure comprises a plurality of high refractive index film layers and at least one low refractive index film layer, the plurality of high refractive index film layers and the at least one low refractive index film layer included in the first laminated structure are alternately arranged on one side of the substrate; the second laminated structure comprises a plurality of high refractive index film layers and at least one low refractive index film layer, the plurality of high refractive index film layers and the at least one low refractive index film layer included in the second laminated structure are alternately arranged on the other side of the substrate; wherein the film layer farthest from the substrate of the first laminated structure and the film layer closest to the substrate are both high refractive index film layers; the film layer farthest from the substrate of the second laminated structure and the film layer closest to the substrate are both high refractive index film layers; wherein the first laminated structure and the second laminated structure each comprise three film layers, in a direction perpendicular to the substrate and away from the substrate, the three film layers are in order a first high refractive index film layer, a first low refractive index film layer and a second high refractive index film layer; the ratio of the thickness of the first high refractive index film layer to the thickness of the second high refractive index film layer is within 2 / 7~ 4 / 7; the ratio of the thickness of the first high refractive index film layer to the thickness of the first low refractive index film layer is within 1 / 10 ~1 / 5; the reflectivity of the anti-glare substrate is greater than 40%, and the reflectivity of blue-violet light of the anti-glare substrate is greater than the reflectivity of yellow-green light.

2. The display module according to claim 1, wherein: the thickness of the high refractive index film layer is 10nm~45nm; and / or, the thickness of the low refractive index film layer is 80~120nm.

3. The display module according to claim 1, wherein: the refractive index of the high refractive index film layer to visible light is 2~2.5; and / or, the refractive index of the low refractive index film layer to visible light is 1.3~1.

5.

4. The display module according to claim 1, wherein: the material of the high refractive index film layer comprises one or more of titanium dioxide, di-niobium pentoxide, and di-potassium pentoxide; and / or, the material of the low refractive index film layer comprises silicon dioxide and / or magnesium fluoride.

5. The display module of claim 1, wherein, the material of the first high refractive index film layer is titanium dioxide, and the thickness is 15±2nm; the material of the first low refractive index film layer is silicon dioxide, and the thickness is 100±2nm; the material of the second high refractive index film layer is titanium dioxide, and the thickness is 35±2nm.

6. A display module, characterized by The display module comprises: a display panel having a light-emitting surface and a back surface; The anti-glare substrate is arranged on the light-emitting surface side of the display panel and comprises a substrate and two stacked structures arranged on opposite sides of the substrate; each stacked structure comprises a plurality of high-refractive-index film layers and at least one low-refractive-index film layer, the plurality of high-refractive-index film layers and the at least one low-refractive-index film layer are alternately arranged on the substrate, and the film layer closest to the substrate and the film layer farthest from the substrate of the stacked structure are high-refractive-index film layers; wherein the reflectivity of the anti-glare substrate is greater than 40%, and the reflectivity of blue-violet light of the anti-glare substrate is greater than that of yellow-green light; the thickness of each high-refractive-index film layer is 10 nm to 45 nm, and the refractive index of the high-refractive-index film layer to visible light is 2 to 2.5; and / or the thickness of each low-refractive-index film layer is 80 nm to 120 nm, and the refractive index of the low-refractive-index film layer to visible light is 1.3 to 1.

5.

7. A display device, characterized by comprising: comprise: the display module according to any one of claims 1 to 5; or the display module according to claim 6.

8. The display device according to claim 7, wherein further comprise: a circular polarizer arranged between the display panel and the anti-glare substrate of the display module; optical glue arranged between the circular polarizer and the anti-glare substrate and used for bonding the circular polarizer and the anti-glare substrate.

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