LCD Mold Frame and Chassis Segmentation for Thin Profile
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Solution Overview
Problem
Existing liquid crystal display (LCD) designs face challenges in reducing the outer size while maintaining mechanical strength and preventing defects such as cracks and reduced fastening with the bottom chassis, due to limitations in the thickness of the first side wall and the mechanical strength of the second side wall.
Innovation Solution
A mold frame and bottom chassis design where the first side wall is positioned at the corner edges and the second side wall at the center of the liquid crystal display panel, both with a thickness of approximately 0.3 mm, allowing for reduced outer size without compromising mechanical strength, using injection molding and buffer tapes to support the backlight unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the thickness of the first side wall is reduced to minimize outer size, then the outer size of the liquid crystal display panel is reduced, but the mechanical strength and fastening capability deteriorate
Solution Approach 1:
The side wall support structure is segmented into multiple components: the first side wall (0.3mm thick) for minimal outer size, the second side wall for mechanical strength, the frame main body for structural support, and buffer tapes for reinforcement. This segmentation allows each component to be optimized for its specific function while collectively solving the contradiction between thin profile and mechanical strength.
Solution Approach 2:
The patent employs composite construction by combining multiple materials and structures: the thin first side wall material, the reinforcing second side wall material, the frame main body material, and the buffer tape material. This composite approach enables the system to achieve both reduced outer size and maintained mechanical strength through the synergistic combination of different material properties.
2Length of moving object
If the thickness of the first side wall is reduced to 0.3 mm to achieve compact size, then portability is improved, but the fastening capability with the bottom chassis deteriorates
Solution Approach 1:
The frame main body acts as an intermediary structure between the thin first side wall and the bottom chassis, providing a robust mounting surface for fastening operations. The buffer tapes serve as intermediary reinforcement elements that distribute fastening forces across the thin-walled structure, preventing damage while enabling reliable attachment to the bottom chassis.
3Length of moving object
If the outer size is reduced to enhance portability, then spatial utility is improved, but the structural integrity and crack prevention capability deteriorate
Solution Approach 1:
The buffer tapes are positioned beforehand at critical stress points between the thin first side wall and the bottom chassis to provide preemptive reinforcement. This prior cushioning prevents crack initiation and propagation by distributing mechanical stresses before they can concentrate and cause damage to the thin-walled structure during assembly or operation.
Data Source
AI summary
A liquid crystal display is disclosed. In one embodiment, the display includes i) a liquid crystal display panel configured to display images, ii) a backlight unit configured to provide light to the liquid crystal display panel and iii) a mold frame comprising a frame main body and a plurality of first side walls, wherein the frame main body is configured to receive the backlight unit, and wherein the first side walls are formed on a top surface of the frame main body. The display may further include a bottom chassis comprising a bottom plate and a plurality of second side walls, wherein the bottom plate is configured to support the mold frame and wherein the second side walls are formed at edges of the bottom plate. The first and second side walls surround side surfaces of the liquid crystal display panel while not contacting the side surfaces, and the first and second side walls are alternately disposed along a circumferential direction of the liquid crystal display panel.