Light Transmissive Adhesion for Thin Bezel LCDs
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Solution Overview
Problem
The challenge in liquid crystal display devices is to achieve a thinner bezel structure while maintaining precise adhesion of light shielding double-sided tape, which is difficult due to the small bezel area, leading to potential light blocking and deterioration in display quality.
Innovation Solution
A light transmissive adhesion member is used between the display panel and the frame, with the frame's inner surface acting as a light absorbing surface, allowing for precise adhesion and minimizing light reflection, thus preventing light blocking and maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the bezel area is made significantly small to achieve a thinner bezel structure, then the aesthetic appearance and thinness are improved, but the precision of adhesion and treatment of the light shielding double-sided tape deteriorates
Solution Approach 1:
A light transmissive adhesive sheet is introduced as an intermediary component between the light shielding double-sided tape and the frame. This adhesive sheet has a larger area than the light shielding tape, extending beyond its boundaries to provide additional adhesion area on the frame. This intermediary layer compensates for the reduced precision in positioning and adhesion that occurs when the bezel area is minimized, ensuring reliable attachment while maintaining the thin bezel design.
2Device complexity
If the light shielding double-sided tape is not precisely adhered to the frame, then the manufacturing complexity is reduced, but light blocking occurs and display quality deteriorates
Solution Approach 1:
The light transmissive adhesive sheet serves as a mediator that decouples the positioning requirements from the adhesion function. The light shielding double-sided tape only needs to be positioned relative to the adhesive sheet, not directly to the frame, reducing positioning complexity. The adhesive sheet's larger area ensures complete coverage and prevents light blocking even if the light shielding tape is not perfectly positioned.
Solution Approach 2:
The adhesive sheet's key parameter is its light transmissivity, which allows it to transmit display light while providing adhesion. By changing the optical parameter of the adhesive material to be light transmissive rather than opaque, the system prevents light blocking while maintaining simple adhesion treatment. The area parameter is also increased beyond the light shielding tape boundaries to provide tolerance for positioning variations.
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
This solution enables a thinner bezel structure without compromising display quality, as the light transmissive adhesion member allows light to pass through, preventing pixel recognition issues and maintaining image clarity even at 45-degree angles.
Implementation Method 1
the adhesion member is light transmissive
Implementation Method 2
at least the inner surface of the frame is a light absorbing surface
Data Source
AI summary
According to one embodiment, an illumination device includes a light source disposed along a first direction, a light guide plate including a first end and a second end, the second end being positioned to be opposite to the first end in a second direction which crosses the first direction, a frame disposed along the second end and including an inner surface and an upper surface, and an adhesion member disposed on at least the upper surface of the frame, wherein the light source is disposed at the first end along the first direction, at least the inner surface of the frame is a light absorbing surface, and the adhesion member is light transmissive.