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Optical adhesive, manufacturing method thereof, bonding method and display device

A technology of optical glue and optical glue layer, which is applied in the field of display devices and optical glue, and can solve problems such as low lamination accuracy

Active Publication Date: 2019-08-09
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention at least partly solves the problem of low bonding precision when the existing optical glue is applied to the bonding process of display devices, and provides an optical glue, a manufacturing method of the optical glue, a bonding method, and a display device. device

Method used

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  • Optical adhesive, manufacturing method thereof, bonding method and display device
  • Optical adhesive, manufacturing method thereof, bonding method and display device
  • Optical adhesive, manufacturing method thereof, bonding method and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] to combine figure 1 and figure 2 , the present embodiment provides an optical adhesive, including a stacked first release film 1, an optical adhesive layer 2, and a second release film 3, on the surface of the optical adhesive layer 2 facing away from the first release film 1 At least one alignment mark 4 is also provided, and the material of the alignment mark 4 includes an up-conversion luminescent material, which can convert infrared light into visible light.

[0022] If the first release film 1 is a heavy release film, the second release film 3 is a light release film. If the first release film 1 is a light release film, the second release film 3 is a heavy release film. In the above solution, the alignment mark 4 is made on the optical adhesive layer 2, or it is made on the heavy release film as in the prior art. Of course, the alignment mark 4 can be made on the surface of the optical adhesive layer 2 facing the heavy release film, or on the surface of the opt...

Embodiment 2

[0030] to combine figure 1 and figure 2 , the present embodiment provides a method for manufacturing optical glue, including the following steps.

[0031] In step S1, an optical adhesive layer 2 attached with a first release film 1 is provided.

[0032] In step S2, at least one alignment mark 4 is formed on the surface of the optical adhesive layer 2 facing away from the first release film 1, the material of the alignment mark 4 includes an up-conversion luminescent material, and the up-conversion luminescent material can convert infrared light for visible light.

[0033] Of course, an up-conversion luminescent material needs to be prepared. The above conversion luminescent material is NaGdF4:Er3 + Nanoparticles are taken as an example.

[0034] First, the Er(NO 3 ) 3 , Yb(NO 3 ) 3 and Gd(NO 3 ) 3 (The above three are usually in powder form or dissolved in solution) into deionized water, and at the same time add ethylenediaminetetraacetic acid (EDTA, usually in pow...

Embodiment 3

[0039] to combine Figure 1-3 , the present embodiment provides a bonding method, using the above-mentioned optical glue for bonding, the bonding method includes: using infrared light to irradiate the area on the optical adhesive layer 2 provided with a contrast mark, and using the identification device 6 to identify the area Shoot for alignment.

[0040] The lamination of the display panel and the touch panel by optical glue is still taken as an example for illustration. That is, the first substrate 7 is the substrate to be bonded on the touch panel. The second substrate 8 is the substrate to be bonded on the display panel. The detailed bonding process is as follows.

[0041] Tear off the light release film, use an infrared light source 5 to irradiate the area where the alignment mark 4 is set, and at the same time use a CCD to capture the alignment mark 4 on the optical adhesive layer 2 and capture the alignment mark 4 on the touch panel , and accordingly attach the optica...

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Abstract

The invention provides an optical adhesive, a manufacturing method thereof, a bonding method and a display device, and belongs to the technical field of display. The problem can be at least partiallysolved that the alignment precision in a bonding process when an existing optical adhesive application and display device is manufactured is low. The optical adhesive comprises a first release film, an optical adhesive layer and a second release film which are stacked, the portion, back on to the surface of the first release film, of the optical adhesive layer is also provided with at least one alignment mark, and the material of the alignment marks comprises an up-conversion luminescent material capable of converting infrared light into visible light.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to an optical adhesive, a manufacturing method of the optical adhesive, a bonding method, and a display device. Background technique [0002] Optical adhesives are often used in the field of manufacturing display devices. Usually the optical adhesive is composed of three stacked layers when leaving the factory: heavy release film, optical adhesive layer, and light release film. Alignment marks are made on the heavy release film. Taking the lamination of the display panel and the touch panel as an example, the lamination process using the existing optical adhesive is as follows: tear off the light release film, use CCD to capture the alignment mark on the heavy release film and capture the mark on the touch panel. Alignment marks and attach the optical adhesive layer to the touch panel accordingly; use CCD to capture the alignment marks on the heavy release film and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J7/40C09J5/00G09F9/35G09F9/33C09K11/85
CPCC09J5/00C09J2203/318C09K11/7773C09J7/10C09J7/40G09F9/33G09F9/35
Inventor 杨超
Owner BOE TECH GRP CO LTD
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