LCD Frame Chamfer for Impact Stress Distribution
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Solution Overview
Problem
As liquid crystal displays (LCDs) become larger, slimmer, and lighter, they require fewer attachment components, leading to inadequate protection from external impacts, as the support members are more prone to bending and fail to stably support the internal components.
Innovation Solution
A support structure for the LCD panel featuring a frame with a chamfer portion positioned between the front and side frame portions, constructed from an aluminum alloy, which enhances resistance to external impacts by distributing stress effectively and maintaining a specific width-to-length ratio and angle configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fewer attachment components are used to decrease fabrication time and reduce manufacturing costs, then productivity is improved, but the support member cannot stably support the LCD components and protect them from external impacts
Solution Approach 1:
The frame is divided into multiple functional portions: a front frame portion, a side frame portion, and a chamfer portion positioned between them. This segmentation allows each portion to perform its specific function - the front frame provides structural support, the side frame extends for stability, and the chamfer portion specifically protects against external impacts by distributing stress.
Solution Approach 2:
The chamfer portion is positioned in a third plane that is intermediate between the front frame portion (first plane) and side frame portion (second plane). This three-dimensional configuration creates an angled stress distribution path that effectively dissipates external impact forces across multiple dimensions, enhancing protection without requiring additional attachment components.
2Volume of moving object
If the LCD becomes larger, slimmer and lighter, then the display area is increased and portability is improved, but the support member is more easily bent by external impacts
Solution Approach 1:
The chamfer portion is pre-positioned at the critical corner region where external impacts most commonly occur. This preliminary protective structure is built into the frame design before the LCD is assembled, creating a first line of defense that prevents impact forces from directly transferring to the thinner LCD panel and support members.
Solution Approach 2:
The chamfer portion has specific dimensional parameters: a width-to-length ratio of 0.002 to 0.01 and an angle of 120 to 150 degrees between the front frame and chamfer. These optimized parameters create an effective stress distribution geometry that significantly improves bending resistance while maintaining the slim profile of the LCD.
Data Source
AI summary
An LCD including an LCD panel and a frame having a front frame portion providing a display window exposing a display area of the LCD panel. The frame includes a side frame portion and a chamfer portion intermediate the front and side frame portions.