Split Mold Frame Rubber Cushion Gap Sealing
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Solution Overview
Problem
In liquid crystal display devices with direct backlights, foreign materials intrude through gaps at the corner portions of the split-frame mold frame and rubber cushion, causing display defects and reducing image quality due to heat convection and size tolerance issues.
Innovation Solution
A split-frame type mold frame is used, where the joint portions of the frame members overlap each other, and linear resilient members are adhered along the frame members' longitudinal direction, with a second resilient member striding over the frame members to close the gaps, preventing foreign material intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a split-frame type mold frame is used to reduce manufacturing complexity and cost, then ease of manufacture is improved, but gaps are formed at joint portions allowing foreign material intrusion
Solution Approach 1:
A resilient member is introduced as an intermediary component between the frame members to seal the gaps formed at joint portions. The resilient member deforms to fill the gap space, preventing foreign material intrusion while maintaining the split-frame structure's manufacturing advantages.
Solution Approach 2:
The resilient member functions as a flexible sealing element that deforms under compression to close gaps at frame joints. This flexible component adapts to the gap geometry and maintains sealing effectiveness despite manufacturing tolerances and assembly variations.
2Strength
If frame members are joined edge-to-edge to maintain structural integrity, then strength is improved, but gaps remain at joint portions due to size tolerance
Solution Approach 1:
The resilient member is installed beforehand to compensate for expected gaps at joint portions caused by size tolerances. This pre-positioned cushioning element ensures that even with manufacturing variations, the gaps are sealed before foreign material intrusion can occur.
3Productivity
If the mold frame structure is simplified for productivity improvement, then productivity is improved, but foreign material intrusion paths are created
Solution Approach 1:
The mold frame is divided into multiple frame members for easier manufacturing and assembly, improving productivity. The resilient member is then used to seal the joints between segmented parts, preventing foreign material intrusion while maintaining the benefits of segmentation.
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 configuration effectively prevents foreign material intrusion into the liquid crystal display panel, enhancing display quality and reliability by eliminating adhesion of foreign materials on the screen and maintaining uniform brightness.
Implementation Method 1
a resilient member, and a liquid crystal display panel mounted on the resilient member
Data Source
AI summary
The present invention provides a liquid crystal display device which can enhance display quality and reliability by preventing the intrusion of foreign materials to a display screen of a liquid crystal display panel thus preventing the adhesion of the foreign materials to the display screen of the liquid crystal display panel. On an upper surface of a peripheral portion of a split mold frame housing a liquid crystal display panel, rubber cushions which are split in four are arranged at corner portions of the peripheral portion in an adhesive manner. With respect to the split portions of the rubber cushions at the corner portion, on a long-side mold frame, extending portions formed by extending both end portions of the long-side rubber cushion larger than a predetermined length are integrally formed and are arranged in an adhesive manner. On a short-side mold frame, a short-side rubber cushion having a predetermined length is arranged. A connecting portion is formed at the corner portion in a state that the end portions of the long-side rubber cushion and short-side rubber cushion intersect with each other in an approximately T-shape.