Flexible Frame Claw Mechanism for LCD Panel Fixation
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Solution Overview
Problem
In liquid crystal display devices, the separation of the liquid crystal panel from the backlight due to low bonding strength of double-faced adhesive tape can lead to reduced display quality, especially when flexible cables are bent, and contact with other members like touch panels or protection panels further degrades the display, causing foreign particles and stress issues.
Innovation Solution
A flexible frame with a claw portion and protruding portion design, where the claw portion is pressed by a protruding portion to securely fix the liquid crystal panel, preventing separation and reducing contact with the frame, thus minimizing foreign particle generation and stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If double-faced adhesive tape is used to fix the liquid crystal panel to the backlight, then the structure is simple and easy to manufacture, but the bonding strength is insufficient causing separation under bending stress
Solution Approach 1:
The frame is divided into multiple claw portions that engage with grooves in the liquid crystal panel, distributing the bonding function across multiple discrete engagement points rather than relying on a single adhesive layer
Solution Approach 2:
The adhesive member is combined with the frame structure to form an integrated assembly where the adhesive and mechanical claw portions work together to secure the liquid crystal panel, merging two bonding mechanisms into a unified system
2Device complexity
If the liquid crystal panel is fixed only with adhesive tape, then the structure is simple, but the panel contacts with other members causing foreign particles and display quality degradation
Solution Approach 1:
The claw portions extend in a direction perpendicular to the main plane of the frame, creating a three-dimensional engagement structure that lifts and secures the liquid crystal panel away from the backlight assembly, preventing contact with other members
Solution Approach 2:
The claw portions act as intermediary mechanical elements between the frame and the liquid crystal panel, providing a physical engagement mechanism that prevents direct contact between the panel and potentially harmful components
3Area of stationary object
If the frame size is reduced to minimize device size, then the overall device becomes more compact, but the bonding area of adhesive tape is reduced weakening fixation
Solution Approach 1:
The claw portions are strategically positioned at specific locations where bending stress and separation forces are most likely to occur, concentrating bonding strength at critical points rather than uniformly distributing adhesive across a large area
Data Source
AI summary
A liquid crystal display device includes a liquid crystal panel, a backlight, a frame having flexibility which includes a base portion and a side portion, and a case which is attached on a side opposite to the display surface side of the frame and engages with the frame, wherein a claw portion which is provided on an inner surface of the side portion of the frame and projected toward a liquid crystal panel and, a protruding portion which pushes the claw portion toward the liquid crystal panel is provided on at least one of the inner surface of the side portion of the case and an outer surface of the side portion of the frame, and the claw portion which is contact with the display surface of the liquid crystal panel in a state in which the claw portion is pressed by the protruding portion.