Electro-Optical Device Light-Shielding Layer Design
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Solution Overview
Problem
Existing electro-optical devices face issues with light leakage and degradation in display quality due to air bubbles and stress applied to liquid crystal display panels, particularly when using light-color printed patterns on transparent protection covers, which can lead to display unevenness and image problems.
Innovation Solution
An electro-optical device design featuring a light-transmissive member with a protruding part, a coloration layer, and an adhesive material, where the coloration layer is formed outside the effective display area to enhance design quality, and a light-shielding layer is used to prevent light leakage, while the adhesive material provides tight contact and shock absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a light-color printed pattern is used on the transparent protection cover to enhance design quality, then the design sophistication is improved, but light leakage occurs allowing inner components to be seen through
Solution Approach 1:
The solution divides the protective cover into distinct functional zones: a first area corresponding to the effective display area and a second area located outside the first area. The coloration layer is applied only to the second area, while the first area remains transparent. This segmentation allows the cover to simultaneously provide design enhancement through coloring and light protection through transparency where needed.
Solution Approach 2:
Different regions of the transparent protection cover are given different optical properties. The first area maintains light transmissivity to prevent light leakage and hide inner components, while the second area receives the coloration layer for design enhancement. This local differentiation of properties resolves the contradiction between aesthetics and light shielding.
2Object-generated harmful factors
If a black pattern is printed on the transparent protection cover to prevent light leakage, then light shielding is improved, but display quality degrades due to air bubbles at level-difference areas
Solution Approach 1:
Instead of applying a light-shielding layer across the entire cover or at peripheral edges, the solution applies the coloration layer specifically to the second area outside the effective display area. This localized approach provides light shielding only where it is needed for design purposes while maintaining uniform bonding surfaces in the first area, preventing air bubble formation and preserving display quality.
3Device complexity
If the transparent protection cover is bonded directly to the liquid crystal display panel, then structural simplicity is maintained, but display quality degrades due to air bubbles and stress on the panel
Solution Approach 1:
A light-transmissive adhesion sheet is introduced as an intermediary layer between the transparent protection cover and the liquid crystal display panel. This adhesion sheet serves multiple functions: it bonds the cover to the panel, absorbs shock to reduce stress on the fragile display panel, and maintains uniform contact to prevent air bubble formation. The adhesion sheet with its light-transmissive properties does not interfere with the optical performance while providing mechanical protection.
4Object-generated harmful factors
If a thick light-shielding layer is formed to completely block light leakage, then light shielding effectiveness is improved, but manufacturing precision decreases due to large level differences causing air bubbles
Solution Approach 1:
The light-shielding function is localized to the second area where the coloration layer is applied, outside the effective display area. The first area corresponding to the display region maintains uniform thickness and transparency. This localized approach provides sufficient light shielding for design purposes while avoiding large level differences in the bonding area, preventing air bubbles and maintaining manufacturing precision.
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 solution effectively prevents light leakage, reduces the risk of air bubbles, and minimizes stress on the liquid crystal display panel, thereby maintaining high display quality and design sophistication.
Implementation Method 1
the adhesive material is provided between a part of the coloration layer and a corresponding part of the liquid crystal display panel as well as between the first-area part of the light-transmissive member and a corresponding part of the liquid crystal display panel so as to offer tight adhesive contact therebetween
Implementation Method 2
the adhesive material provides tight contact and shock absorption
Data Source
AI summary
An electro-optical device includes: an electro-optical panel; a light-transmissive member that overlaps the electro-optical panel and has a protruding part that protrudes so as to be positioned outside an edge of the electro-optical panel, the light-transmissive member having a first area and a second area that is located outside the first area; a coloration layer that is formed on a surface of the light-transmissive member at the second area; an adhesive material that is provided between a part of the coloration layer and a corresponding part of the electro-optical panel as well as between the part of the light-transmissive member and a corresponding part of the electro-optical panel; and a first light-shielding layer formed over one surface of the light-transmissive member, and the first light-shielding layer being formed at an area where the coloration layer does not overlap the adhesive material in a plan view.