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Sapphire glass cover plate and surface-mounted display employing same

A technology of sapphire glass and cover plate, which is applied in the direction of instruments, optics, optical components, etc., can solve the problems of reducing the outdoor readability of smart devices, reducing outdoor contrast, optimizing design, etc., to improve outdoor readability and reduce reflectivity , to improve the effect of contrast

Inactive Publication Date: 2017-06-23
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Generally speaking, the refractive index of the sapphire glass cover is about 1.76-1.77. When the sapphire glass cover is applied to a fully bonded display, the sapphire glass cover is completely bonded to the display through optical glue; however, when the sapphire glass cover After the board is bonded with the optical glue, the reflectivity of the contact surface between the sapphire glass cover and the optical glue is as high as 0.73%. Such a high reflectivity will greatly reduce the outdoor readability of smart devices, and the outdoor contrast will be greatly reduced
So far no one has optimized the design for this situation

Method used

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  • Sapphire glass cover plate and surface-mounted display employing same
  • Sapphire glass cover plate and surface-mounted display employing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] see figure 1 , is a schematic cross-sectional view of the sapphire glass cover plate (after the optical adhesive layer is bonded) in Example 1 of the present invention, the sapphire glass cover plate includes a sapphire glass substrate 10 and a coating film coated on the sapphire glass substrate 10 Layer 20.

[0020] In this example, see figure 1 , the optical glue layer 30 is covered on the coating layer 20 .

[0021] The coating layer 20 includes low-refractive index layers and high-refractive-index layers alternately stacked along its thickness direction; the layer closest to the sapphire glass substrate 10 is a low-refractive-index layer; the total layer of the low-refractive index layer and the high-refractive index layer The number is 2n or 2n+1 layers, wherein n is an integer greater than or equal to 1 and less than or equal to 5; the refractive index of the low refractive index layer is 1.5-1.6; the refractive index of the high refractive index layer is 1.75-2...

Embodiment 2

[0027] The basic structure of the sapphire glass cover plate of embodiment 2 is the same as embodiment 1, and the difference is that: the materials and thicknesses adopted in each layer of coating layer 20 are different, specifically as follows:

[0028] In embodiment 2, the coating layer 20 includes 3 layers (2n+1, and n=1), wherein, one layer closest to the sapphire glass substrate 10 is the low refractive index layer 21, and its material adopts Al 2 o 3 , the refractive index is about 1.54, and the thickness of this layer is 29nm; the middle layer is a high refractive index layer 22, its material is SiN, the refractive index is about 2.1, and the thickness of this layer is 10nm; the outermost layer is a low Refractive index layer 23, its material adopts Al 2 o 3 , the refractive index is about 1.54, and the thickness of the layer is 94nm.

Embodiment 3

[0030] The basic structure of the sapphire glass cover plate of embodiment 3 is the same as embodiment 1, and the difference is that: the materials and thicknesses adopted in each layer of coating layer 20 are different, specifically as follows:

[0031] In embodiment 3, the coating layer 20 includes 3 layers (2n+1, and n=1), wherein, one layer closest to the sapphire glass substrate 10 is the low refractive index layer 21, and its material adopts Al 2 o 3 , the refractive index is about 1.54, and the thickness of this layer is 29nm; the middle layer is a high refractive index layer 22, and its material is ZrO 2 , the refractive index is about 1.97, and the thickness of this layer is 12nm; the outermost layer is a low refractive index layer 23, and its material is Al 2 o 3 , the refractive index is about 1.54, and the thickness of this layer is 92nm.

[0032] The sapphire glass cover plate of the present invention can be applied to fully laminated displays.

[0033] Genera...

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Abstract

The invention relates to a sapphire glass cover plate and a surface-mounted display employing the same. The cover plate comprises a sapphire glass base material and a coating film layer disposed on the sapphire glass base material in a coating manner. The coating film layer comprises low-refractive-index layers and high-refractive-index layers, wherein the low-refractive-index layers and the high-refractive-index layers are alternately arranged in the thickness direction. The layer which is the nearest to the sapphire glass base material is the low-refractive-index layer. According to the invention, an inventor accidentally finds that the refractive index of an interface of the cover plate with an optical glue layer can be reduced when one surface, attached to the optical glue layer, of the cover plate is provided with the coating film layer in a specific structure, and, in particular, the reflectivity of incident light at the band from 420nm-680nm is greatly reduced, thereby improving the contrast of the display, and improving the outdoor readability of the display under an outdoor condition or a condition of strong light.

Description

technical field [0001] The invention relates to a sapphire glass cover plate, in particular to a sapphire glass cover plate applied to a full-fit display, and a full-fit display using the sapphire glass cover plate as a protective glass cover plate. Background technique [0002] Generally speaking, the refractive index of the sapphire glass cover is about 1.76-1.77. When the sapphire glass cover is applied to a fully bonded display, the sapphire glass cover is completely bonded to the display through optical glue; however, when the sapphire glass cover After the board is bonded to the optical glue, the reflectivity of the contact surface between the sapphire glass cover and the optical glue is as high as 0.73%. Such a high reflectivity will greatly reduce the outdoor readability of the smart device, and the outdoor contrast will be greatly reduced. So far no one has optimized the design for this situation. Contents of the invention [0003] In view of the above-mentioned ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/11
CPCG02B1/11G02B1/118
Inventor 张琨马绍栋
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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