Display Panel Base Stress Distribution via Segmented Thickness
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Solution Overview
Problem
The excessive stress on the base of a display panel caused by a flexible printed circuit board during the bending process leads to cracking or breaking, particularly as the monitor thickness decreases, affecting the assembly and long-term stability of display devices.
Innovation Solution
Incorporating a mechanical strengthening element, such as a glue, on the base's surface at positions corresponding to the flexible printed circuit board's side edges to distribute stress and prevent damage during bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the base is made thinner to reduce monitor thickness, then the overall device thickness is reduced, but the stress concentration at the flexible printed circuit board bending position increases, leading to base cracking or breaking
Solution Approach 1:
The base is segmented into different thickness regions: a first thickness in the bending position area and a second thickness in other areas. This allows the base to have localized thickness variation, providing structural reinforcement where needed while maintaining overall thinness for the monitor design
Solution Approach 2:
The base exhibits non-uniform thickness distribution, with the first thickness specifically at the bending position and the second thickness elsewhere. This local quality variation ensures that the base has enhanced strength precisely where the flexible printed circuit board bends, without compromising the overall thin profile of the monitor
2Device complexity
If the flexible printed circuit board is bent to adjust assembling space, then the assembling space is optimized, but excessive stress is generated at the bending position, causing base damage over time
Solution Approach 1:
The base thickness is segmented into two distinct regions: a thicker first thickness at the bending position to handle stress, and a thinner second thickness elsewhere to maintain compact design. This segmentation allows the base to accommodate the bent flexible printed circuit board without excessive stress concentration
Solution Approach 2:
The base has differentiated local properties with varying thickness: the first thickness provides mechanical support at the stress-prone bending position, while the second thickness maintains the overall sleek design. This local quality approach resolves the conflict between assembly space optimization and stress management
3Volume of moving object
If the base thickness is reduced uniformly, then the monitor achieves a thinner profile, but the base becomes more susceptible to cracking at the flexible printed circuit board connection area
Solution Approach 1:
Rather than uniform thinning, the base thickness is segmented into a first thickness at the connection area and a second thickness elsewhere. This allows the base to achieve an overall thin profile while maintaining localized thickness for reliability at the vulnerable connection area
Solution Approach 2:
The base exhibits spatially varying thickness properties, with the first thickness providing enhanced reliability at the flexible printed circuit board connection area, while the second thickness enables the monitor to achieve a thin profile in non-critical areas
Data Source
AI summary
A display panel includes a base having a first surface and a second surface disposed oppositely; a flexible printed circuit board disposed on a first surface of the base and bent toward a second surface of the base; and a mechanical strengthening element disposed on a second surface of the base and at least positioned at regions of the second surface corresponding to two side edges of the flexible printed circuit board.