Display Seal Asymmetric Geometry Air Bubble Dispersion
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Solution Overview
Problem
Air bubbles in the filler of display devices can enter the display area, affecting image display, as existing solutions either have limited effectiveness or impractical processes for removing protruded filler.
Innovation Solution
A display device design featuring a seal with internal angle corner surfaces and convex surfaces that collect and disperse air bubbles within compartment areas, reducing their influence on image display by forming a continuous seal with a convex surface that protrudes inwardly from the circuit and counter substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protrusion is formed by a stacked film to prevent air bubbles, then air bubble prevention is improved, but the protrusion height is limited and the effect is small
Solution Approach 1:
The seal cross-section is designed with asymmetric geometry, featuring a first inclined surface and a second inclined surface with different slopes. The first inclined surface has a gentler slope while the second has a steeper slope, creating an asymmetric profile that enables greater protrusion height compared to symmetric designs. This asymmetric configuration allows the seal to extend higher into the display area while maintaining structural integrity and sealing effectiveness.
Solution Approach 2:
The solution transitions from a two-dimensional film-based protrusion to a three-dimensional seal structure with complex cross-sectional geometry. By adding the dimension of vertical protrusion with dual inclined surfaces, the seal creates a more effective barrier against air bubbles. The third-dimensional configuration allows the seal to occupy space both horizontally and vertically, providing enhanced air bubble prevention capability.
2Reliability
If the convex portion is divided in corner portions to provide gaps, then air bubble prevention is improved, but the filler removal process becomes more complex
Solution Approach 1:
The seal cross-section is segmented into multiple functional surfaces: a first inclined surface, a second inclined surface, and optionally a third inclined surface. This segmentation of the seal profile into distinct geometric segments allows each surface to perform its function while maintaining an integrated structure. The segmented design provides effective air bubble prevention through the corner portion configuration without requiring the seal to be divided into separate pieces or requiring complex assembly processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively reduces the impact of air bubbles on image display by dispersing them within compartment areas, preventing their movement and minimizing their effect on the display.
Implementation Method 1
air bubbles are stable in a state where the air bubbles come in contact with the sealing surface
Implementation Method 2
air bubbles are collected inside of the corner surfaces because of a property that the air bubbles are stable in a state where the air bubbles come in contact with the sealing surface
Data Source
AI summary
A display device includes a circuit substrate that is formed of a plurality of layers including a light control element; a counter substrate that faces a surface of the circuit substrate on which the light control element is disposed, with a gap therebetween; a seal that is disposed between the circuit substrate and the counter substrate to surround the light control element; and a filler with which a sealed space surrounded by at least the circuit substrate, the counter substrate, and a sealing surface of the seal is filled. The sealing surface includes internal angle corner surfaces formed by an inner surface of the seal, and a convex surface formed adjacent to the corner surfaces from at least one of the circuit substrate, the counter substrate, and the seal.