Cover structure, display module and display device

Abstract

This disclosure provides a cover plate structure, a display module, and a display device, belonging to the field of display technology. The cover plate structure includes a light-transmitting area, a light-shielding area surrounding the light-transmitting area, and an aperture area located within the light-shielding area. The cover plate structure includes a cover plate, a first optical control layer, a light-shielding layer, and a second optical control layer sequentially disposed along a direction away from the cover plate. The light-shielding layer is located within the light-shielding area. The light-shielding layer has a first opening in the aperture area, exposing the first optical control layer. The second optical control layer covers the light-shielding layer and contacts the first optical control layer at the first opening. The refractive indices of the cover plate, the first optical control layer, and the light-shielding layer are all different. The refractive indices of the first optical control layer and the second optical control layer are the same; or, the refractive indices of the first optical control layer and the second optical control layer are different, and the transmittance of the first optical control layer to visible light is less than that of the second optical control layer to visible light.

Description

Technical Field

[0001] This disclosure belongs to the field of display technology, specifically relating to a cover plate structure, a display module, and a display device. Background Technology

[0002] With the continuous development of display technology, the requirements for the dark-state effect of display products are becoming increasingly stringent. Among these requirements, concealing virtual buttons and / or icons on the surface of display products, eliminating color differences between virtual buttons and / or icons and their surrounding areas, and improving the consistency of the dark-state effect are essential for enhancing the premium feel of the product. Utility Model Content

[0003] This disclosure aims to at least solve one of the technical problems existing in the prior art, and to provide a cover structure, a display module, and a display device.

[0004] Firstly, the technical solution adopted to solve the technical problem of this disclosure is a cover plate structure, which includes a light-transmitting area, a light-shielding area surrounding the light-transmitting area, and a hole area located in the light-shielding area. The cover plate structure includes a cover plate, a first optical control layer, a light-shielding layer, and a second optical control layer arranged sequentially along a direction away from the cover plate.

[0005] The light-shielding layer is located in the light-shielding area; the light-shielding layer has a first opening in the aperture area, exposing the first optical control layer; the second optical control layer covers the light-shielding layer and contacts the first optical control layer at the first opening position.

[0006] The refractive indices of the cover plate, the first optical control layer, and the light-shielding layer are all different; the refractive indices of the first optical control layer and the second optical control layer are the same; or, the refractive indices of the first optical control layer and the second optical control layer are different, and the transmittance of the first optical control layer to visible light is less than that of the second optical control layer to visible light.

[0007] In some embodiments, when the refractive indices of the first optical control layer and the second optical control layer are the same, the transmittance of the first optical control layer to visible light is greater than 90%.

[0008] The cover plate structure further includes a filter structure disposed on the side of the second optical control layer opposite to the first optical control layer; the filter structure is located in the aperture region.

[0009] In some embodiments, when the refractive indices of the first optical control layer and the second optical control layer are the same, the cover plate structure further includes a first adhesive layer disposed on the side of the second optical control layer away from the first optical control layer, and a third optical control layer disposed on the side of the first adhesive layer away from the second optical control layer.

[0010] The third optical control layer has a second opening disposed in the aperture region and exposes the first adhesive layer; the filter structure, at least a portion of its thickness, is located within the second opening and in contact with the first adhesive layer.

[0011] In some embodiments, the thickness of the first optical control layer is less than the thickness of the second optical control layer; the sum of the thickness of the first optical control layer and the thickness of the second optical control layer is equal to the thickness of the third material layer.

[0012] In some embodiments, the first optical control layer, the second optical control layer, and the third optical control layer are all made of the same material.

[0013] In some embodiments, the first optical control layer and the second optical control layer are both made of silicon oxynitride; the filter structure is made of ink.

[0014] In some embodiments, when the refractive indices of the first optical control layer and the second optical control layer are the same, the transmittance of the first optical control layer to visible light is greater than 90%; and / or, the transmittance of both the first optical control layer and the second optical control layer is greater than the transmittance of the filter structure; and / or, the transmittance of the filter structure is greater than the transmittance of the light-shielding layer.

[0015] In some embodiments, when the refractive indices of the first optical control layer and the second optical control layer are different, the transmittance of the first optical control layer to visible light is between 2% and 20%; and the transmittance of the second optical control layer to visible light is greater than 90%.

[0016] In some embodiments, when the refractive indices of the first optical control layer and the second optical control layer are different, the material of the first optical control layer is any one of negative photoresist, molybdenum, and silicon nitride; the material of the second optical control layer is silicon oxynitride.

[0017] In some embodiments, when the refractive indices of the first optical control layer and the second optical control layer are different, the cover plate structure further includes a third optical control layer disposed on the side of the second optical control layer away from the first optical control layer; the third optical control layer is made of the same material as the second optical control layer, but different material from the first optical control layer.

[0018] In some embodiments, the thickness of the first optical control layer is greater than or equal to the thickness of the second optical control layer; the thickness of the second optical control layer is the same as the thickness of the third material layer.

[0019] In some embodiments, a second adhesive layer is disposed on the side of the second optical control layer opposite to the first optical control layer; the second adhesive layer has a third opening disposed in the aperture region;

[0020] When the refractive indices of the first optical control layer and the second optical control layer are the same, the filter structure with a partial thickness is disposed in the third opening; the cover plate structure also includes an anti-reflection film layer disposed on the side of the filter structure away from the cover plate; the anti-reflection film layer is located in the aperture region;

[0021] When the refractive indices of the first optical control layer and the second optical control layer are different, the cover plate structure further includes an antireflective coating layer with at least a portion of its thickness disposed within the third opening.

[0022] In some embodiments, the antireflective coating layer includes a varnish film and a homogenizing film stacked together; the varnish film is made of varnish, and the homogenizing film is made of a mixture of homogenizing powder and ink.

[0023] In some embodiments, the varnish film is disposed on the side of the light-diffusing film close to the cover plate; or, the varnish film is disposed on the side of the light-diffusing film away from the cover plate.

[0024] In some embodiments, the antireflective coating is a mixture of varnish, leveling powder, and ink.

[0025] In some embodiments, the material of the light-shielding layer is one or more of metallic chromium, chromium oxide, black resin, and black photoresist.

[0026] Secondly, embodiments of this disclosure also provide a display module, including a display panel and a cover plate structure as described in any one of the first aspects disposed on the light-emitting side of the display panel; wherein the side of the second optical control layer in the cover plate structure facing away from the cover plate is attached to the display panel.

[0027] Thirdly, embodiments of this disclosure also provide a display device, which includes the display module as described in the second aspect. Attached Figure Description

[0028] Figure 1a This is a floor plan of the relevant display modules.

[0029] Figure 1b This is a schematic diagram of a stacked display module.

[0030] Figure 2 This is a schematic diagram of the stacked cover structure under Example 1 provided in the embodiments of this disclosure.

[0031] Figure 3This is a schematic diagram of the stacked cover structure under Example 2 provided in the embodiments of this disclosure.

[0032] Figure 4 This is a schematic diagram showing the test results of the color space with or without a first optical control layer in the light-shielding area provided in an embodiment of this disclosure.

[0033] Figure 5 This is a schematic diagram showing the test results of the color space when there is or is no first optical control layer in the aperture area, according to an embodiment of this disclosure.

[0034] Figure 6 This is a schematic diagram of the color difference results of the light-shielding area and the aperture area provided in an embodiment of this disclosure.

[0035] Figure 7 This is a schematic diagram of the stacked cover structure under Example 3 provided in the embodiments of this disclosure.

[0036] Figure 8 This is a schematic diagram of the stacked cover structure under Example 4 provided in the embodiments of this disclosure.

[0037] Figure 9 This is a schematic diagram of the stacked cover structure under Example 5 provided in the embodiments of this disclosure.

[0038] Figure 10 This is a schematic diagram of the stacked cover structure under Example 6 provided in the embodiments of this disclosure.

[0039] Figure 11 This is a schematic diagram of the stacked cover structure under Example 7 provided in the embodiments of this disclosure.

[0040] Figure 12 This is a schematic diagram of the stacked cover structure under Example 8 provided in the embodiments of this disclosure.

[0041] Figure 13 This is a schematic diagram of a display module provided in an embodiment of the present disclosure. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. The components of the embodiments of this disclosure described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely represents selected embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0043] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0044] In this disclosure, "multiple or several" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0045] In related technologies, an optical anti-reflection layer 01 is provided between the cover plate 1 and the backlight module 200 to hide the electrode structure in the display area AA and improve the display effect. Figure 1a This is a floor plan of the relevant display modules. Figure 1b This is a schematic diagram of a stacked display module, such as... Figure 1a and Figure 1b As shown, the display module has a display area AA, a peripheral area BB surrounding the display area AA, and an aperture area CC located in the peripheral area BB. The display module includes a back cover 300, a backlight module 200, a light-shielding layer 3, and a cover plate 1. The light-shielding layer 3 is located in the peripheral area BB and is used to shield the circuit structure of the backlight module 200 located in the peripheral area BB. The light-shielding layer 3 has a large opening in the display area AA and a small opening (i.e., the aperture area CC) in the peripheral area BB. The large opening exposes the pixels in the backlight module 200 for display, and the small opening corresponds to virtual buttons and / or icons 02, enabling touch response. The light-shielding layer 3 is almost opaque, with a transmittance of less than or equal to 0.01%, thus creating a black border. The virtual buttons and / or icons 02 are visible to the human eye in the dark. Specifically, as follows... Figure 4 and Figure 5Data from samples 1, 2, and 3 on the left show that the brightness L* of the light-shielding area BB0 is greater than that of the aperture area CC. Above the light-shielding layer 3, the light-shielding area BB0 has only one glass cover plate 1, while the aperture area CC has one glass cover plate 1 and an optical anti-reflection layer 01. The light-shielding area BB0 reflects ambient light more effectively, while the aperture area CC, due to the influence of the optical anti-reflection layer 01, experiences absorption and refraction, resulting in less reflection of ambient light and ultimately a significant color difference between the two. To meet the needs of high-end products, how to hide the virtual buttons and / or icons 02 on the surface of the display product, eliminate the color difference between the virtual buttons and / or icons 02 and their surrounding areas, and improve the consistency of the screen's dark-state effect is a pressing technical problem in the display field.

[0046] In view of this, the present disclosure provides a cover structure 100 that substantially completely hides the structure corresponding to the hole area CC, such as virtual buttons and / or icon 02, achieving the effect of being invisible to the human eye in the dark.

[0047] Figure 2 This is a schematic diagram of the stacked cover plate structure under Example 1 provided in the embodiments of this disclosure. Figure 3 This is a schematic diagram of the stacked cover structure in Example 2 of the embodiments of this disclosure, as shown below. Figure 2 and Figure 3 As shown, the cover plate structure 100 includes a light-transmitting area (not shown in the figure), a light-shielding area BB0 surrounding the light-transmitting area, and an aperture area CC located in the light-shielding area BB0; wherein, the light-transmitting area corresponds to the display area AA of the display module (e.g., ...). Figure 1a As shown), the light-shielding area BB0 corresponds to the peripheral area BB of the display module (e.g., Figure 1a As shown), the hole area CC corresponds to the area of ​​the virtual buttons and / or icon 02 in the display module (e.g., Figure 1a (As shown). The cover structure 100 includes a cover plate 1, a first optical control layer 2, a light-shielding layer 3, and a second optical control layer 4 sequentially arranged in a direction away from the cover plate 1. The cover plate 1 can be a glass cover plate 1, such as ultra-thin glass. The light-shielding layer 3 is located in the light-shielding area BB0 so that when the cover structure 100 is applied to the display module, it is used to shield the circuit structure of the backlight module 200 located in the peripheral area BB, and to prevent external light from affecting the circuit structure in the backlight module 200. The transmittance of the light-shielding layer 3 is very low, much lower than the transmittance of the first optical control layer 2. For example, the light-shielding layer 3 is a black matrix layer.

[0048] The light-shielding layer 3 has a first opening V1 in the aperture region CC, exposing the first optical control layer 2; the second optical control layer 4 covers the light-shielding layer 3 and contacts the first optical control layer 2 at the first opening V1. Thus, the transmittance of the aperture region CC is higher than the transmittance of the light-shielding region BB0.

[0049] Optionally, such as Figure 2As shown, the refractive indices of the cover plate 1, the first optical control layer 2, and the light-shielding layer 3 are all different; the refractive indices of the first optical control layer 2 and the second optical control layer 4 are the same. For example, the materials of the cover plate 1, the first optical control layer 2, and the light-shielding layer 3 are all different. Here, ambient light undergoes one refraction through the glass cover plate 1 to the first optical control layer 2, and another refraction through the first optical control layer 2 to the light-shielding layer 3. Multiple refractions can increase the light scattering rate. At the same time, some of the ambient light is absorbed through the first optical control layer 2, thereby reducing the light reflectivity of the light-shielding area BB0. Meanwhile, the refractive indices of the first optical control layer 2 and the second optical control layer 4 are the same, and ambient light undergoes only one refraction through the glass cover plate 1 to the first optical control layer 2 and the second optical control layer 4 of the aperture area CC. Therefore, through multiple light path refractions in the light-shielding area BB0 and one refraction in the aperture area CC, the light reflectivity of the light-shielding area BB0 is reduced, thereby narrowing the light reflectivity of the light-shielding area BB0 and the light reflectivity of the aperture area CC, improving the color difference between the two areas, and achieving the concealment of the aperture area CC.

[0050] Optionally, such as Figure 3 As shown, the first optical control layer 2 and the second optical control layer 4 have different refractive indices. The transmittance of the first optical control layer 2 to visible light is less than that of the second optical control layer 4. Here, the first optical control layer 2 is made of a light-blocking material with low transmittance to visible light. Based on the light-blocking and light-reflecting characteristics of the light-blocking material, it is ensured that the light transmission and reflection effects of the light-blocking area BB0 and the aperture area CC of the first optical control layer 2 are the same. This ensures that the optical effect of the surface of the first optical control layer 2 near the cover plate 1 is consistent, thereby improving the color difference between the light-blocking area BB0 and the aperture area CC, and achieving the concealment of the aperture area CC.

[0051] In some embodiments, such as Figure 2 As shown, when the refractive indices of the first optical control layer 2 and the second optical control layer 4 are the same, the transmittance of both the first optical control layer 2 and the second optical control layer 4 to visible light is greater than 90%, and the transmittance to the invisible light band is also greater than 90%. The cover plate structure 100 also includes a filter structure 5 disposed on the side of the second optical control layer 4 opposite to the first optical control layer 2; the filter structure 5 is located in the aperture region CC and is used to filter light of a specific wavelength band (such as light in the band near 550nm) passing through the aperture region CC.

[0052] Optionally, the material of the filter structure 5 is ink.

[0053] In some embodiments, such as Figure 2As shown, when the refractive indices of the first optical control layer 2 and the second optical control layer 4 are the same, the thickness of the first optical control layer 2 is less than the thickness of the second optical control layer 4. For example, the thickness ratio of the first optical control layer 2 to the second optical control layer 4 is between 1 / 8 and 1 / 2. For example, the thickness ratio of the first optical control layer 2 to the second optical control layer 4 is 1 / 8, 1 / 4, or 1 / 2. Exemplarily, the thickness of the first optical control layer 2 is a first thickness, and the thickness of the second optical control layer 4 is a second thickness, where the first thickness is less than the second thickness. For example, the first thickness is 200 angstroms (Å), and the second thickness is 600 angstroms (Å).

[0054] In some embodiments, such as Figure 2 As shown, when the refractive indices of the first optical control layer 2 and the second optical control layer 4 are the same, the cover plate structure 100 further includes a first adhesive layer 6 disposed on the side of the second optical control layer 4 away from the first optical control layer 2, and a third optical control layer 7 disposed on the side of the first adhesive layer 6 away from the second optical control layer 4; the third optical control layer 7 has a second opening V2 disposed in the aperture region CC and exposes the first adhesive layer 6; a filter structure 5 with at least a partial thickness is located in the second opening V2 and is in contact with the first adhesive layer 6.

[0055] The third optical control layer 7 is bonded to the second optical control layer 4 via the first adhesive layer 6. The first optical control layer 2, the second optical control layer 4, and the third optical control layer 7 are all laid as a single layer. When the cover plate structure 100 is applied to the display module, the second optical control layer 4 and the third optical control layer 7 are used to hide the electrode structure within the display area AA, thereby eliminating shadows and improving the display effect.

[0056] The third optical control layer 7 has an opening in the aperture region CC, namely the second opening V2. This reduces the absorption of light by the third optical control layer 7 in the aperture region CC compared to... Figure 1b The relevant technologies are used to improve the light reflectivity of the aperture area CC; further, the first optical control layer 2 of the shading area BB0 is combined to reduce the light reflectivity of the shading area BB0, thus bringing the light reflectivity of the shading area BB0 closer to that of the aperture area CC, improving the color difference between the two areas, and realizing the hiding of the aperture area CC.

[0057] Optionally, the thickness of the first optical control layer 2 is less than the thickness of the second optical control layer 4 (specifically, the overall extended thickness, such as the thickness of the thin layer located in the light-transmitting area); the sum of the thicknesses of the first optical control layer 2 and the second optical control layer 4 is equal to the thickness of the third optical control layer 7. For example, the thickness of the third layer is a third thickness; the third thickness is the sum of the first thickness and the second thickness. For example, the first thickness is 200 angstroms (Å), the second thickness is 600 angstroms (Å), and the third thickness is 800 angstroms (Å).

[0058] This disclosure allows for the separation of an 800 Å (A) thick optical anti-reflection layer 01 into a first optical control layer 2 with a thickness of 200 Å (A) and a second optical control layer 4 with a thickness of 600 Å (A). The first optical control layer 2 and the second optical control layer 4, located in the light-transmitting area, are in direct contact, and their combined thickness reaches a third thickness sufficient to satisfy the anti-reflection conditions for the display area AA. Thus, without increasing the thickness of the cover plate 1, anti-reflection of the display area AA is achieved, while also improving the color difference between the aperture area CC and the light-shielding area BB0. In the light-transmitting area, the stacked second optical control layer 4 and third optical control layer 7 further enhance the anti-reflection effect on the circuit structure of the display area AA.

[0059] Optionally, the first adhesive layer 6 is disposed entirely, covering the second optical control layer 4, which can protect the second optical control layer 4 located in the aperture region CC. This avoids the impact on the second optical control layer 4 when the third optical control layer 7 is subsequently exposed to the second opening V2 during the fabrication process. Simultaneously, the first adhesive layer 6 can also reduce the impact of the height difference between the film layers on the side closest to the cover plate 1. For example, the material of the first adhesive layer 6 can be a transparent photoresist material. Thus, the first adhesive layer 6 can serve as an insulating layer to isolate conductive structures (such as the first and second wiring layers described below).

[0060] Optionally, the first optical control layer 2, the second optical control layer 4, and the third optical control layer 7 are all made of the same material.

[0061] Optionally, the transmittance of the first optical control layer 2, the second optical control layer 4, and the third optical control layer 7 are all the same. For example, the transmittance of the first optical control layer 2, the second optical control layer 4, and the third optical control layer 7 in the visible light band is all greater than 90%, and the transmittance in the invisible light band is also greater than 90%. Thus, the first optical control layer 2, the second optical control layer 4, and the third optical control layer 7 cannot achieve a large amount of absorption of visible light. The transmittance of the first optical control layer 2, the second optical control layer 4, and the third optical control layer 7 in the visible light band is all greater than the transmittance of the filter structure 5 in the visible light band; the transmittance of the filter structure 5 in the visible light band is between 2% and 20%.

[0062] Optionally, the transmittance of the light-shielding layer 3 to visible light is greater than that of the filter structure 5 to visible light. For example, the transmittance of the light-shielding layer 3 is less than 1%, such as the transmittance of the light-shielding layer 3 to both visible light fluctuations and invisible light bands being less than 1%, for example, the transmittance of the light-shielding layer 3 is 0.01%. In this way, a large amount of ambient light that passes through the first optical control layer 2 is absorbed by the light-shielding layer 3.

[0063] For example, the first optical control layer 2, the second optical control layer 4, and the third optical control layer 7 are all made of silicon oxynitride (SiOxNy), where x and y are positive integers. The filter structure 5 is made of ink. The light-shielding layer 3 is made of one or more combinations of metallic chromium, chromium oxide, black resin, and black photoresist.

[0064] Figure 4 This is a schematic diagram illustrating the test results of the color space with and without a first optical control layer in the light-shielding area, as provided in an embodiment of this disclosure. Figure 5 This is a schematic diagram illustrating the test results of the color space when there is or is no first optical control layer in the aperture area, according to an embodiment of this disclosure. Figure 6 This is a schematic diagram illustrating the color difference results of the light-shielding area and the aperture area provided in an embodiment of this disclosure. (See reference...) Figure 2 The CIE Labs color space defines three dimensions: L* represents lightness (from 0 black to 100 white), a* represents the red / green axis (positive values ​​for red, negative values ​​for green), and b* represents the yellow / blue axis (positive values ​​for yellow, negative values ​​for blue). Any color can be represented using (L*, a*, b*) coordinates. The left column represents the L* coordinate, and the right column represents the a* and b* coordinates. △E indicates that the color is based on... Figure 4 and Figure 5 The color difference calculated from the data.

[0065] like Figure 4 As shown, samples 1, 2, and 3 on the left represent the color space data reflected in the shaded area BB0 when the first optical control layer 2 is not set within it in three measurements; samples 4, 5, and 6 on the right represent the color space data reflected in the shaded area BB0 when the first optical control layer 2 (SiOxNy) is set within it in three measurements. Figure 5 As shown, samples 1, 2, and 3 on the left represent the color space data reflected in the shaded area BB0 after three measurements when the first optical control layer 2 was not installed in the aperture area CC; samples 4, 5, and 6 on the right represent the color space data reflected in the shaded area BB0 after three measurements when the first optical control layer 2 (SiOxNy) was installed in the aperture area CC. The comparison shows that after installing the first optical control layer 2 in the shaded area BB0, the lightness L* is significantly reduced; after installing the first optical control layer 2 in the aperture area CC, the lightness L* is significantly increased. Figure 6 As shown, line A represents the target desired color difference data; line B represents... Figure 1b Color difference data calculated from cover plate structure 100; C-line representation Figure 2 Cover structure 100 based on Figure 4 and Figure 5The color difference data was calculated from the data. In the three samples, the color differences disclosed in this paper were 1.36, 1.50 and 1.36, respectively, all of which were less than the target expected value of 2.5, that is, the color difference was improved.

[0066] Therefore, this disclosure Figure 2 The structure adds a first optical control layer 2 with the same refractive index as the second optical control layer 4. In the light-shielding area BB0, the difference in refractive index between the first optical control layer 2 and the cover plate 1 and the light-shielding layer 3 causes ambient light to be refracted multiple times and partially absorbed by the first optical control layer 2, reducing the light reflectivity of the light-shielding area, i.e., reducing the brightness L*. Alternatively, the same refractive index between the first optical control layer 2 and the second optical control layer 4, and the second opening V2 set in the aperture area CC by the third optical control layer 7, reduce the refraction and absorption of ambient light, increasing the light reflectivity of the aperture area CC, i.e., increasing the brightness L*. In this way, the light reflectivity of the light-shielding area BB0 and the light reflectivity of the aperture area CC are brought closer, improving the color difference between the two areas and achieving the concealment of the aperture area CC.

[0067] In some embodiments, such as Figure 3 As shown, when the refractive indices of the first optical control layer 2 and the second optical control layer 4 are different, the transmittance of the first optical control layer 2 for visible light (such as 550nm wavelength) is between 2% and 20%; the transmittance of the second optical control layer 4 for visible light is greater than 90%. Here, the first optical control layer 2 is made of a light-blocking material with low transmittance for visible light, and the first optical control layer 2 is disposed on the side of the light-shielding layer 3 closer to the cover plate 1. In this way, most of the ambient light entering the first optical control layer 2 is absorbed, and a small amount is reflected on the surface of the first optical control layer 2 on the side closer to the cover plate 1. This ensures that the optical effect of the surface of the first optical control layer 2 on the side closer to the cover plate 1 is consistent, thereby improving the color difference between the light-shielding area BB0 and the aperture area CC, and realizing the hiding of the aperture area CC.

[0068] Optionally, the transmittance of the first optical modulation layer 2 to visible light is greater than that of the light-shielding layer 3 to visible light. The transmittance of the second optical modulation layer 4 to visible light is greater than that of the light-shielding layer 3 to visible light. For example, the transmittance of the light-shielding layer 3 is less than 1%, such that the transmittance of the light-shielding layer 3 is less than 1% in both visible light fluctuations and invisible light bands, for example, the transmittance of the light-shielding layer 3 is 0.01%.

[0069] Optionally, the first optical control layer 2 is made of a material with high light-blocking properties, such as any one of negative photoresist, molybdenum, or silicon nitride. The material of the second optical control layer 4 is silicon oxynitride (SiOxNy).

[0070] In some embodiments, such as Figure 3As shown, when the refractive indices of the first optical control layer 2 and the second optical control layer 4 are different, that is, the first optical control layer 2 is made of a semi-transparent light-blocking material (such as negative photoresist). The cover plate structure 100 also includes a third optical control layer 7 disposed on the side of the second optical control layer 4 opposite to the first optical control layer 2; the third optical control layer 7 is made of the same material as the second optical control layer 4, but different from the material of the first optical control layer 2.

[0071] and Figure 2 The difference is that the first optical control layer 2 is made of a light-blocking material with low transmittance of visible light, the first adhesive layer 6 is reduced, and the third optical control layer 7 does not have a second opening V2.

[0072] The first optical control layer 2, the second optical control layer 4, and the third optical control layer 7 are all laid as a single layer. When the cover plate structure 100 is applied to the display module, the second optical control layer 4 and the third optical control layer 7 are used to hide the electrode structure within the display area AA, thereby eliminating shadows and improving the display effect.

[0073] Optionally, both the third optical control layer 7 and the second optical control layer 4 are made of silicon oxynitride (SiOxNy), and both have the same transmittance and refractive index. The transmittance of the third optical control layer 7 and the second optical control layer 4 is greater than 90%. Specifically, the transmittance of the third optical control layer 7 and the second optical control layer 4 is greater than 90% in both the visible light wave band and the invisible light wave band.

[0074] Optionally, the thickness of the first optical control layer 2 is greater than or equal to the thickness of the second optical control layer 4; the thickness of the second optical control layer 4 is the same as the thickness of the third optical control layer 7. For example, the thickness of both the second optical control layer 4 and the third optical control layer 7 is the third thickness, which is 800 angstroms (Å).

[0075] The thickness of the second optical control layer 4, located in the light-transmitting area, can directly reach the third thickness required to meet the anti-aliasing conditions of the display area AA, thereby achieving anti-aliasing of the circuit structure of the display area AA. In the light-transmitting area, the stacked second optical control layer 4 and third optical control layer 7 further enhance the anti-aliasing effect on the circuit structure of the display area AA.

[0076] Optionally, the first optical control layer 2, the second optical control layer 4, and the third optical control layer 7 are all integrally arranged.

[0077] For example, the first optical control layer 2 is made of negative photoresist, and the second optical control layer 4 and the third optical control layer 7 are both made of silicon oxynitride (SiOxNy), where x and y are positive integers. The light-shielding layer 3 is made of one or more combinations of metallic chromium, chromium oxide, black resin, and black photoresist.

[0078] For example, the material of the first optical control layer 2 is a negative photoresist with a certain transmittance. Its appearance is a black flowing liquid, and its main components may include acrylic resin, polyacrylic resin monomer, carbon black, propylene glycol methyl ether acetate, photoinitiator, etc.

[0079] Figure 7 This is a schematic diagram of the stacked cover plate structure in Example 3 provided in this disclosure. Figure 8 This is a schematic diagram of the stacked cover plate structure in Example 4 provided in the embodiments of this disclosure. Figure 9 This is a schematic diagram of the stacked cover plate structure in Example 5 provided in the embodiments of this disclosure. Figure 10 This is a schematic diagram of the stacked cover plate structure in Example 6 provided in the embodiments of this disclosure. Figure 11 This is a schematic diagram of the stacked cover structure in Example 7 provided in the embodiments of this disclosure. Figure 12 This is a schematic diagram of the stacked cover structure under Example 8 provided in the embodiments of this disclosure.

[0080] like Figure 2 , Figure 3 , Figures 7-12 As shown, the cover plate structure 100 also includes a second adhesive layer 8 disposed on the side of the second optical control layer 4 opposite to the first optical control layer 2; the second adhesive layer 8 has a third opening V3 disposed in the hole region CC.

[0081] In some embodiments, Figure 2 Based on the cover plate structure 100 of Example 1, an anti-reflective film layer 9 is further added to the aperture area CC, which not only improves the light uniformity of the aperture area CC, but also ensures the concealment of the aperture area CC.

[0082] like Figure 7 and Figure 8 As shown, when the refractive indices of the first optical control layer 2 and the second optical control layer 4 are the same, a filter structure 5 with a partial thickness is disposed within the third opening V3. The cover plate structure 100 also includes an antireflective coating layer 9 disposed on the side of the filter structure 5 facing away from the cover plate 1; the antireflective coating layer 9 is located in the aperture region CC.

[0083] Optionally, such as Figure 7 As shown, the antireflective coating layer 9 includes a varnish film 91 and a light-diffusing film 92 stacked together, with the varnish film 91 disposed on the side of the light-diffusing film 92 close to the cover plate 1.

[0084] Optionally, such as Figure 8 As shown, the antireflective coating layer 9 includes a varnish film 91 and a light-diffusing film 92 stacked together, with the varnish film 91 disposed on the side of the light-diffusing film 92 away from the cover plate 1.

[0085] The varnish film 91 is made of varnish, an auxiliary agent in conventional ink formulations, primarily composed of resin and isophorone. It is liquid under normal conditions and solidifies after printing and heat curing. The homogenizing film 92 is a mixture of homogenizing powder and ink, capable of scattering light emitted from the light source (the light source in the backlight module 200), thus improving the uniformity of the emitted light and achieving a homogenized light effect. However, scattered light reduces the light reflectivity of the aperture area CC, making the aperture area CC more visible. This disclosure utilizes the high light transmittance of the varnish film 91 to achieve a light scattering effect, thereby increasing the light reflectivity of the aperture area CC and ensuring its concealment. Therefore, this embodiment can achieve both homogenized light effect and good concealment of the aperture area CC by placing the varnish film 91 before / after the homogenizing film 92.

[0086] For example, the ink in the homogenizing film 92 can be white ink.

[0087] Optionally, such as Figure 9 As shown, the antireflective coating layer 9 is a mixture of varnish, leveling agent, and ink. Compared to Figure 7 and Figure 8 This further reduces the thickness of the cover plate structure by 100. At the same time, the antireflective film layer 9 is mixed with a light-diffusing material and a varnish, which can achieve a light-diffusing effect in the aperture area CC and ensure good concealment of the aperture area CC.

[0088] In some embodiments, Figure 3 Based on the cover plate structure 100 in Example 2, an anti-reflective film layer 9 is further added to the aperture area CC, which not only improves the light uniformity of the aperture area CC, but also ensures the concealment of the aperture area CC.

[0089] like Figure 10 and Figure 11 As shown, when the refractive indices of the first optical control layer 2 and the second optical control layer 4 are different, the cover plate structure 100 also includes an antireflective coating layer 9 with at least a partial thickness disposed within the third opening V3.

[0090] Optionally, such as Figure 10 As shown, the antireflective coating layer 9 includes a varnish film 91 and a light-diffusing film 92 stacked together, with the varnish film 91 disposed on the side of the light-diffusing film 92 close to the cover plate 1.

[0091] Optionally, such as Figure 11 As shown, the antireflective coating layer 9 includes a varnish film 91 and a light-diffusing film 92 stacked together, with the varnish film 91 disposed on the side of the light-diffusing film 92 away from the cover plate 1.

[0092] The varnish film 91 is made of varnish. The homogenizing film 92 is made of a mixture of homogenizing powder and ink, which can scatter the light emitted by the light source (the light source in the backlight module 200), thereby improving the uniformity of the light emitted by the light source and achieving a homogenized light effect. However, scattered light will reduce the light reflectivity of the aperture area CC, making the aperture area CC more visible. This disclosure improves the light reflectivity of the aperture area CC by using the high light transmittance of the varnish film 91 to ensure the hiding effect of the aperture area CC. Thus, this embodiment can achieve both a homogenized light effect and good hiding of the aperture area CC by setting the varnish film 91 before / after the homogenizing film 92.

[0093] Optionally, such as Figure 12 As shown, the antireflective coating layer 9 is a mixture of varnish, leveling agent, and ink. Compared to Figure 10 and Figure 11 This further reduces the thickness of the cover plate structure by 100. At the same time, the antireflective film layer 9 is mixed with a light-diffusing material and a varnish, which can achieve a light-diffusing effect in the aperture area CC and ensure good concealment of the aperture area CC.

[0094] Optionally, such as Figure 12 As shown, the antireflective film layer 9 is filled in the third opening V3, and its surface away from the cover plate 1 is flush with the surface of the second adhesive layer 8 away from the cover plate 1, so as to reduce the thickness of the cover plate structure 100 and facilitate the realization of a lightweight design.

[0095] Compared to Figure 1a The existing technology only uses the filter structure 5 (ink) to hide the hole area CC. This disclosure uses any of the cover plate structures 100 in Examples 1 to 8 above, which can eliminate the color difference between the light-shielding area BB0 and the hole area CC, and achieve a full black edge effect.

[0096] In some embodiments, the cover structure 100 further includes a circuit structure (not shown) with touch sensor functionality, so that the cover glass of this disclosure has both protective and touch sensing functions. Thus, by applying the cover structure 100 of this disclosure without a display module, the overall thickness of the display module can be reduced, achieving a thinner and lighter design.

[0097] For example, targeting Figure 2The cover plate structure 100 of Example 1 is fabricated as follows: a cover plate 1 is provided; a first optical control layer 2 (200 Å), a light-shielding layer 3, a second optical control layer 4 (600 Å), a first wiring layer (not shown in the figure), a first adhesive layer 6, a second wiring layer (not shown in the figure), a third wiring layer (not shown in the figure), a third optical control layer 7 (800 Å), a second adhesive layer 8, and a filter structure 5 are sequentially formed on the cover plate 1; finally, the cover plate structure 100 is formed by cutting. The first and second wiring layers are located in the light-transmitting area, and the third wiring layer is located in the light-shielding area BB0; the first and second wiring layers can be used to arrange touch-related electrode structures (such as Tx and Rx), and the third wiring layer can be used to arrange touch leads electrically connected to the touch electrodes for signal transmission.

[0098] For example, targeting Figure 3 The fabrication process of the cover plate structure 100 in Example 2 is as follows: a cover plate 1 is provided; a first optical control layer 2 (semi-transparent photoresist material layer), a light-shielding layer 3, a second optical control layer 4 (800A), a first wiring layer, a first adhesive layer 6 (located in the light-transmitting area, therefore not shown in the figure), a second wiring layer, a third wiring layer, a third optical control layer 7 (800A), and a second adhesive layer 8 are sequentially formed on the cover plate 1; finally, the cover plate structure 100 is formed by cutting.

[0099] For example, targeting Figure 7 Example 3 of the cover plate structure 100 provides a cover plate 1; a first optical control layer 2 (200A), a light-shielding layer 3, a second optical control layer 4 (600A), a first wiring layer, a first adhesive layer 6, a second wiring layer, a third wiring layer, a third optical control layer 7 (800A), a second adhesive layer 8, a filter structure 5, a varnish film 91, and a light-diffusing film 92 are sequentially formed on the cover plate 1; finally, the cover plate structure 100 is formed by cutting.

[0100] For example, targeting Figure 8 Example 4 of the cover plate structure 100 provides a cover plate 1; a first optical control layer 2 (200A), a light-shielding layer 3, a second optical control layer 4 (600A), a first wiring layer, a first adhesive layer 6, a second wiring layer, a third wiring layer, a third optical control layer 7 (800A), a second adhesive layer 8, a light filter structure 5, a light-diffusing film 92, and a light-varnish film 91 are sequentially formed on the cover plate 1; finally, the cover plate structure 100 is formed by cutting.

[0101] For example, targeting Figure 9Example 5 of the cover plate structure 100 provides a cover plate 1; a first optical control layer 2 (200A), a light-shielding layer 3, a second optical control layer 4 (600A), a first wiring layer, a first adhesive layer 6, a second wiring layer, a third wiring layer, a third optical control layer 7 (800A), a second adhesive layer 8, a filter structure 5, and an anti-reflection film layer 9 are sequentially formed on the cover plate 1; finally, the cover plate structure 100 is formed by cutting.

[0102] For example, targeting Figure 10 Example 6 shows a cover plate structure 100, which includes a cover plate 1. The cover plate 1 is provided with the following layers formed sequentially: a first optical control layer 2 (semi-transparent photoresist layer), a light-shielding layer 3, a second optical control layer 4 (800A), a first wiring layer, a first adhesive layer 6 (located in the light-transmitting area, therefore not shown in the figure), a second wiring layer, a third wiring layer, a third optical control layer 7 (800A), a second adhesive layer 8, a varnish film 91, and a light-diffusing film 92. Finally, the cover plate structure 100 is formed by cutting. The first adhesive layer 6 is located in the light-transmitting area.

[0103] For example, targeting Figure 11 Example 7 of the cover plate structure 100 provides a cover plate 1; a first optical control layer 2 (semi-transparent photoresist material layer), a light-shielding layer 3, a second optical control layer 4 (800A), a first wiring layer, a first adhesive layer 6 (located in the light-transmitting area, therefore not shown in the figure), a second wiring layer, a third wiring layer, a third optical control layer 7 (800A), a second adhesive layer 8, a light-diffusing film 92, and a gloss film 91 are sequentially formed on the cover plate 1; finally, the cover plate structure 100 is formed by cutting.

[0104] For example, targeting Figure 12 Example 8's cover plate structure 100 includes a cover plate 1; a first optical control layer 2 (semi-transparent photoresist material layer), a light-shielding layer 3, a second optical control layer 4 (800A), a first wiring layer, a first adhesive layer 6, a second wiring layer, a third wiring layer, a third optical control layer 7 (800A), a second adhesive layer 8, and an anti-reflection film layer 9 are sequentially formed on the cover plate 1; finally, the cover plate structure 100 is formed by cutting. The first adhesive layer 6 is located in the light-transmitting area.

[0105] In addition, this disclosure also provides a display module. Figure 13 This is a schematic diagram of a display module provided in an embodiment of the present disclosure, such as... Figure 13 As shown, there is a display panel 10 and a cover plate structure 100 disposed on the light-emitting side of the display panel 10; the side of the second optical control layer 4 in the cover plate structure 100 facing away from the cover plate 1 is attached to the display panel 10.

[0106] Specifically, the cover plate structure 100 also includes a second adhesive layer 8 disposed on the side of the second optical control layer 4 opposite to the first optical control layer 2. The second adhesive layer 8 can be used to bond to the light-emitting side of the display panel 10. Alternatively, the bonding structure can be redesigned to achieve bonding between the cover plate 1 and the display panel 10. The display panel 10 can be a liquid crystal display panel. The display panel 10 includes a backlight module 200 and a back cover 300.

[0107] This disclosure also provides a display device, which includes the display module of any of the above embodiments. The display device can be, for example, any product with display functionality such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or in-vehicle device. Other essential components of this display device are readily understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting the scope of this disclosure.

[0108] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A cover structure, characterized by The cover plate structure includes a light-transmitting area, a light-shielding area surrounding the light-transmitting area, and a hole area located in the light-shielding area. The cover plate structure includes a cover plate, a first optical control layer, a light-shielding layer, and a second optical control layer arranged sequentially in a direction away from the cover plate. The light-shielding layer is located in the light-shielding area; The light-shielding layer has a first opening disposed in the aperture area, exposing the first optical control layer; The second optical control layer covers the light-shielding layer and contacts the first optical control layer at the first opening position; The refractive indices of the cover plate, the first optical control layer, and the light-shielding layer are all different. The first optical control layer and the second optical control layer have the same refractive index; or, the first optical control layer and the second optical control layer have different refractive indices, and the transmittance of the first optical control layer to visible light is less than that of the second optical control layer to visible light.

2. The cover plate structure according to claim 1, wherein When the refractive indices of the first optical control layer and the second optical control layer are the same, the transmittance of the first optical control layer and the second optical control layer to visible light is both greater than 90%. The cover plate structure further includes a filter structure disposed on the side of the second optical control layer opposite to the first optical control layer; the filter structure is located in the aperture region.

3. The cover plate structure according to claim 2, characterized by When the refractive indices of the first optical control layer and the second optical control layer are the same, the cover plate structure further includes a first adhesive layer disposed on the side of the second optical control layer away from the first optical control layer, and a third optical control layer disposed on the side of the first adhesive layer away from the second optical control layer. The third optical control layer has a second opening in the aperture region and exposes the first adhesive layer; The filter structure, at least a portion of its thickness, is located within the second opening and in contact with the first adhesive layer.

4. The cover plate structure according to claim 3, wherein The thickness of the first optical control layer is less than the thickness of the second optical control layer; the sum of the thicknesses of the first and second optical control layers is equal to the thickness of the third optical control layer.

5. The cover plate structure according to claim 3, wherein The first optical control layer, the second optical control layer, and the third optical control layer are all made of the same material.

6. The cover plate structure according to claim 5, characterized in that, The first optical control layer, the second optical control layer, and the third optical control layer are all made of silicon oxynitride; the filter structure is made of ink.

7. The cover plate structure according to claim 2, wherein The transmittance of both the first optical control layer and the second optical control layer is greater than the transmittance of the filter structure; and / or, the transmittance of the filter structure is greater than the transmittance of the light-shielding layer.

8. The cover plate structure according to claim 1, wherein When the refractive indices of the first optical control layer and the second optical control layer are different, the transmittance of the first optical control layer to visible light is between 2% and 20%; the transmittance of the second optical control layer to visible light is greater than 90%.

9. The cover plate structure according to claim 1, wherein When the refractive indices of the first optical control layer and the second optical control layer are different, the material of the first optical control layer is any one of negative photoresist, molybdenum, and silicon nitride; the material of the second optical control layer is silicon oxynitride.

10. The cover plate structure according to claim 1, wherein When the refractive indices of the first optical control layer and the second optical control layer are different, the cover plate structure further includes a third optical control layer disposed on the side of the second optical control layer away from the first optical control layer. The third optical control layer is made of the same material as the second optical control layer, but different from the material of the first optical control layer.

11. The cover plate structure according to claim 10, wherein The thickness of the first optical control layer is greater than or equal to the thickness of the second optical control layer; the thickness of the second optical control layer is the same as the thickness of the third material layer.

12. The cover plate structure according to any one of claims 2 to 11, characterized by It also includes a second adhesive layer disposed on the side of the second optical control layer opposite to the first optical control layer; the second adhesive layer has a third opening disposed in the hole region; When the refractive indices of the first optical control layer and the second optical control layer are the same, the filter structure with a partial thickness is disposed in the third opening; the cover plate structure also includes an anti-reflection film layer disposed on the side of the filter structure away from the cover plate; the anti-reflection film layer is located in the aperture region; When the refractive indices of the first optical control layer and the second optical control layer are different, the cover plate structure further includes an antireflective coating layer with at least a portion of its thickness disposed within the third opening.

13. The cover plate structure according to claim 12, wherein The antireflective coating layer includes a varnish film and a uniform coating film stacked together; the varnish film is made of varnish, and the uniform coating film is made of a mixture of uniform powder and ink.

14. The cover plate structure according to claim 13, wherein The varnish film is disposed on the side of the light-diffusing film close to the cover plate; or, the varnish film is disposed on the side of the light-diffusing film away from the cover plate.

15. The cover plate structure of claim 12, wherein The antireflective coating is made of a mixture of varnish, leveling powder, and ink.

16. The cover plate structure according to claim 1, wherein The material of the light-shielding layer is one or more of metallic chromium, chromium oxide, black resin, and black photoresist.

17. A display module, characterized by The invention includes a display panel and a cover plate structure as described in any one of claims 1 to 16 disposed on the light-emitting side of the display panel; wherein the side of the second optical control layer facing away from the cover plate in the cover plate structure is attached to the display panel.

18. A display device comprising: Includes the display module as described in claim 17.

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