Display Device Corner Recess for Uniform Sealant Breaking
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Solution Overview
Problem
The manufacturing of small or medium-sized display devices using divided glass substrates often results in nonuniform force application during breaking, leading to deterioration of the sectional shape and potential micro-cracks due to uneven distances between scribe lines and sealants.
Innovation Solution
The use of recesses at corner portions of the glass substrates, where the sealant is placed, ensures a uniform distance between the scribe line and the sealant, reducing the likelihood of micro-cracks and maintaining the sectional shape by applying consistent force during breaking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If glass substrates are bonded using sealant and then broken along scribe lines, then display devices can be manufactured efficiently, but nonuniform distance between scribe line and sealant causes nonuniform force application leading to deterioration of sectional shape
Solution Approach 1:
The recess is formed in advance at the corner portion of the glass substrate before bonding with the sealant. This preliminary structural preparation ensures that when the sealant is applied, it will be positioned at a uniform distance from the scribe line, preventing nonuniform force application during the breaking process and avoiding deterioration of the sectional shape.
2Device complexity
If sealant is applied without recess structure, then manufacturing process is simpler, but distance between scribe line and sealant becomes nonuniform causing micro-cracks
Solution Approach 1:
The recess is formed in advance at the corner portion of the glass substrate before bonding with the sealant. This preliminary structural preparation ensures that when the sealant is applied, it will be positioned at a uniform distance from the scribe line, preventing nonuniform force application during the breaking process and avoiding deterioration of the sectional shape.
Data Source
AI summary
A display device includes a first substrate that is provided with a display element in a display region, a second substrate that faces the first substrate, and a sealant that bonds the first substrate and the second substrate to each other in a region surrounding the periphery of the display region in a plan view, in which each of the first substrate and the second substrate has a rectangular shape, in which at least one of the first substrate and the second substrate has a corner portion and a recess formed at a position which is close to the corner portion and overlaps at least a part of the region in which the sealant is disposed, and in which the sealant is provided to be in contact with at least a surface far from the display region among inner surfaces of the recess.