Integrated black cover plate structure

Abstract

The utility model discloses an integrated black cover plate structure which comprises a transparent substrate, a display area in the middle and a frame area arranged on the periphery of the display area are formed on the transparent substrate, the display area is provided with a display module, an IR hole area is formed in the frame area, an IR ink layer is printed on the IR hole area, and the display module is arranged in the frame area. A reflection increasing layer used for increasing the reflectivity of the IR hole area is arranged between the IR ink layer and the transparent substrate. According to the integrated black cover plate structure, the integrated black effect can be achieved, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display equipment, in particular to an integrated black cover plate structure. Background Art

[0002] With the development of automobile technology, the functions of automobile display modules are increasing, such as integrating infrared sensors into the display cover. It is used to detect the driver's status by infrared and interact with other devices by infrared. Therefore, in order to hide the infrared sensor in the display module, it is necessary to dig holes in the BM area of ​​the cover and print IR ink.

[0003] IR ink has the characteristics of low visible light transmittance, visible light transmittance ≤10%, infrared light transmittance ≥90%. This ink has high absorption in the visible light band, and can hide the infrared sensor in the display module. Usually the ink in the BM area is adjusted according to the screen-off effect of the display area, and the visible light color difference ΔE<3 is required. Since the reflectivity of IR ink in the visible light band is low and inconsistent with the reflection of the BM area ink, there will be a color difference between BM ink and IR ink.

[0004] In order to reduce this color difference, it is generally achieved by adjusting the color and reflectivity of IR ink, such as adding aluminum powder or other powders to IR ink to brighten it. Obviously, the addition of these materials can improve the reflectivity of IR ink in visible light, but there are still problems such as poor printing of IR holes and whitening at a large viewing angle. Utility Model Content

[0005] In order to solve the above problems, the utility model aims to provide an integrated black cover plate structure, which can improve the reflectivity of the IR hole area and achieve an integrated black cover plate effect.

[0006] Based on the above problems, the technical solution provided by the utility model is:

[0007] An integrated black cover structure comprises a transparent substrate, wherein a display area in the middle and a frame area arranged at the periphery of the display area are formed on the transparent substrate, a display module is provided in the display area, an IR hole area is formed in the frame area, an IR ink layer is printed on the IR hole area, and a reflection enhancement layer for increasing the reflectivity of the IR hole area is provided between the IR ink layer and the transparent substrate.

[0008] In some embodiments, the reflection enhancing layer is a resin layer.

[0009] In some embodiments, the transmittance of the reflection enhancement layer is greater than 80%.

[0010] In some embodiments, the refractive index of the reflection enhancement layer is 1.25-1.5 or 1.57-1.8.

[0011] In some embodiments, the refractive index of the reflection enhancement layer is 1.33±0.05 or 1.75±0.05.

[0012] In some embodiments, the thickness of the reflection enhancement layer is 3-5 μm.

[0013] In some embodiments, the IR ink layer has a thickness of 3 to 5 μm.

[0014] In some of the embodiments, the frame area is located at the periphery of the IR hole area and is provided with a first black ink layer attached to the transparent substrate and a second black ink layer attached to the first black ink layer.

[0015] In some embodiments, the thickness of the first black ink layer / the second black ink layer is 7-10 μm.

[0016] In some embodiments, the transparent substrate is glass.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] The reflectivity enhancement layer is arranged between the IR ink layer and the transparent substrate, so as to improve the reflectivity of the IR hole area, so that the reflectivity of the IR hole area is consistent with the reflectivity of the entire frame area, so as to achieve the effect of an integrated black cover and improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a structural schematic diagram of an integrated black cover plate structure embodiment 1 of the utility model;

[0021] Figure 2 This is a schematic structural diagram of a transparent substrate in Example 1 of the utility model;

[0022] Figure 3 This is a schematic diagram of the reflected light on the cover plate in Example 1 of the utility model;

[0023] in:

[0024] 1. Transparent substrate; 1-1. Display area; 1-2. Frame area; 1-3. IR aperture area;

[0025] 2. Display module;

[0026] 3. First black ink layer;

[0027] 4. Second black ink layer;

[0028] 5. Reflective layer;

[0029] 6. IR ink layer. DETAILED DESCRIPTION

[0030] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the utility model and are not limited to the scope of the utility model. The implementation conditions used in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0031] Example 1

[0032] like Figure 1 As shown, it is a schematic diagram of the structure of Embodiment 1 of the present utility model, which provides an integrated black cover structure, including a transparent substrate 1 and a display module 2 arranged on the back of the transparent substrate 1, such as Figure 2 As shown, a display area 1-1 in the middle and a frame area 1-2 arranged outside the display area 1-1 are formed on a transparent substrate 1, a display module 2 is arranged in the display area 1-1, an IR hole area 1-3 is arranged in the frame area 1-2, and an IR ink layer 6 is printed in the IR hole area 1-3. The transparent substrate 1 is glass.

[0033] In the frame area 1-2, located at the periphery of the IR hole area 1-3, a first black ink layer 3 and a second black ink layer 4 are adhered to the transparent substrate 1. In this example, the reflectivity of the transparent cover 1 and the display module 2 is usually 5.16%. The reflectivity of the transparent substrate 1 and the first black ink layer 3 is adjusted to 5.25%, and the L value is 28.2.

[0034] The first black ink layer 3 is a toned GV3 ink, and the second black ink layer 4 is a first black ink layer 1 with some additives added to improve the surface energy and facilitate adhesion. The thickness of the first black ink layer 1 / the second black ink layer 2 is 7-10 μm.

[0035] The IR ink layer 6 is set to transmit infrared light and block visible light and ultraviolet light in the band below 550nm. Since the transmittance of the IR ink layer 6 in the visible light band is less than 7%, and the transmittance in the infrared band is greater than 90%, after adjusting the transmittance of the IR ink, the reflectivity of the IR ink layer 6 is measured to be 4.3%, the L value is 25.1, and the ΔL value between the IR ink layer 6 and the black ink layer is 3.1, which has a large color difference. Therefore, visually, the frame area 1-2 printed with the black ink layer is integrally black with the display area 1-1, while the IR hole area 1-3 is not consistent with it. The IR hole area 1-3 appears as a darker black spot due to its lower reflectivity, and loses the integral black effect.

[0036] In order to achieve the integrated black effect of the cover plate, a reflection enhancement layer 5 for increasing the reflectivity of the IR aperture areas 1-3 is provided between the IR ink layer 6 and the transparent substrate 1. Preferably, the reflection enhancement layer 5 is a resin layer, which can be prepared by silk screen printing, spraying, electroplating and the like.

[0037] The reflection enhancement layer 5 has a large transmittance, which is greater than 80%. According to the glass transmittance, refractive index, refractive index of the IR ink layer 6, transmittance of the reflection enhancement layer 5, and target reflectivity, the refractive index of the reflection enhancement layer 5 is calculated to be 1.25-1.5 or 1.57-1.8. Preferably, the refractive index of the reflection enhancement layer 5 is 1.33±0.05 or 1.75±0.05.

[0038] The specific calculation process is as follows:

[0039] like Figure 3 The figure shows the schematic diagram of light reflected on the cover plate, wherein the first black ink layer 3 of the frame area 1-2 is opaque, and the reflected light is R1+R2, which is about 5.2%. The reflected light of the IR hole area 1-3 is Y1+Y2+Y3, the transmittance of the transparent substrate 1 is t1, the transmittance of the reflection enhancement layer 5 is t2, and the visible light transmittance of the IR hole area 1-3 is relatively low, generally <10%, and the reflectivity of light on its lower surface is <5%, so the reflected light on the lower surface of the IR ink layer 6 is <0.02%, so the reflection on its lower surface can be ignored.

[0040] The calculation of reflectivity is as follows:

[0041] Y(glass+coating+IR ink)=Y1+t1t1Y2+t1t1t2t2Y3

[0042]

[0043]

[0044]

[0045] When the transmittance T1 of the transparent substrate 1 is 92%, the transmittance T2 of the reflection-enhancing layer 5 is close to 98%, the refractive index of the transparent substrate 1 is 1.53, and the refractive index of the IR ink layer 6 is 1.52, it can be concluded that different coating refractive indices will have different reflectivities. Since the refractive indices of the transparent substrate 1 and the IR ink layer 6 are both close to 1.52, in order to achieve the reflectivity target of 5.2%, the optimal refractive index of the reflection-enhancing layer 6 is 1.33±0.05 or 1.75±0.05.

[0046] In this example, the reflection enhancement layer 6 is made of a Japanese resin - NH660, which has a refractive index of 1.71 and a transmittance of 98%, and is cured by UV lamp. The thickness of the reflection enhancement layer 6 is 3-5 μm, and the thickness of the IR ink layer 6 is 3-5 μm.

[0047] During implementation, the first black ink layer 3 is first printed on the frame area 1-2 of the transparent substrate 1, and the IR hole is reserved. After the first black ink layer 3 is dried, the second black ink layer 4 is printed, and the IR hole is also reserved; then the reflection enhancement layer 5 is printed on the reserved IR hole, and the IR ink layer 6 is printed after the reflection enhancement layer 5 is cured. The reflectivity of the IR hole area 1-3 is measured to be 4.9%, which is 0.6% higher than the previous 4.3%. The L value is also increased from the original 25.1 to 27.5, and ΔL is reduced from 3 to 0.7, and the color difference is significantly reduced, thereby achieving the integrated black effect of the cover plate.

[0048] Example 2

[0049] In Example 2 of the present invention, the other parts are the same as Example 1, except that the reflection enhancement layer 6 uses a low-refractive-index ultraviolet-cured resin XG-D1360, the refractive index of which is 1.37 and the transmittance is 90%. After preparation, the reflectivity of the IR hole area is measured to be 4.82%, which is 0.52% higher than the previous 4.3%. The L value is also increased from the original 25.1 to 26.7, and ΔL is reduced from 3 to 1.5, and the color difference is significantly reduced.

[0050] In summary, a reflection enhancement layer is provided between the IR ink layer and the transparent substrate to improve the reflectivity of the IR hole area, thereby reducing the color difference between the IR hole area and the display area, thereby achieving an integrated black effect of the cover plate.

[0051] The above examples are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An integrated black cover structure, comprising a transparent substrate, a display area in the middle and a frame area arranged outside the display area are formed on the transparent substrate, a display module is provided in the display area, an IR hole area is formed in the frame area, and an IR ink layer is printed on the IR hole area, characterized in that: A reflection enhancement layer for increasing the reflectivity of the IR aperture area is arranged between the IR ink layer and the transparent substrate.

2. The integrated black cover plate structure according to claim 1, characterized in that: The reflection enhancement layer is a resin layer.

3. The integrated black cover plate structure according to claim 2, characterized in that: The transmittance of the reflection enhancement layer is greater than 80%.

4. The integrated black cover plate structure according to claim 2, characterized in that: The refractive index of the reflection enhancement layer is 1.25-1.5 or 1.57-1.

8.

5. The integrated black cover plate structure according to claim 4, characterized in that: The refractive index of the reflection enhancement layer is 1.33±0.05 or 1.75±0.

05.

6. The integrated black cover plate structure according to claim 5, characterized in that: The thickness of the reflection enhancement layer is 3-5 μm.

7. The integrated black cover plate structure according to claim 1, characterized in that: The thickness of the IR ink layer is 3-5 μm.

8. The integrated black cover plate structure according to claim 1, characterized in that: The frame area is located at the periphery of the IR hole area and is provided with a first black ink layer attached to the transparent substrate and a second black ink layer attached to the first black ink layer.

9. The integrated black cover plate structure according to claim 8, characterized in that: The thickness of the first black ink layer / the second black ink layer is 7-10 μm.

10. The integrated black cover plate structure according to claim 1, characterized in that: The transparent substrate is glass.

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