Double-Sided Display Module Resin Frame Impact Absorption
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Solution Overview
Problem
Existing double-sided display liquid crystal modules in portable devices face issues with dust accumulation and damage to flexible substrates due to exposure, and metallic back cases can be prone to distortion and burrs, leading to instability and damage to sub liquid crystal panels.
Innovation Solution
A double-sided display liquid crystal module design featuring a metallic back case with a removable frame member and recessed portions to prevent direct contact between the sub liquid crystal panel and the back case, ensuring flatness and protection against external forces and burrs, using a resin frame to support the sub panel and absorb impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the flexible substrate is simply placed on the backlight without covering, then the assembly is simple and lightweight, but the circuit pattern and components are exposed to dust and impact damage
Solution Approach 1:
The back case is segmented into a main body and a separate cover portion that specifically covers the opening where the flexible substrate is located. This segmentation allows the protective function to be added without complicating the overall assembly structure, as the cover portion can be integrated into the existing back case design.
Solution Approach 2:
The cover portion acts as an intermediary element between the external environment and the flexible substrate. It provides a protective barrier that prevents dust and impact from reaching the circuit pattern and components on the flexible substrate, while still allowing the assembly to remain relatively simple.
2Reliability
If a metallic back case is used to protect the flexible substrate and enhance strength, then protection and structural integrity are improved, but the metal plate is prone to distortion and burr formation causing instability
Solution Approach 1:
The cover portion is designed with localized flatness requirements only in the regions where panels are mounted, rather than requiring the entire metal back case to be perfectly flat. This allows the metal plate to maintain sufficient structural integrity while avoiding distortion and burr formation in critical areas, ensuring panel stability without compromising overall protection.
3Volume of moving object
If the sub liquid crystal panel is directly fitted to close the opening in the back case, then the structure is compact, but the panel is vulnerable to damage from burrs and external forces
Solution Approach 1:
The cover portion is designed to extend beyond the opening and provide a cushioning protective layer before external forces or burrs can directly contact the sub liquid crystal panel. This beforehand cushioning ensures the panel is protected from damage while maintaining a compact overall structure, as the cover portion integrates seamlessly with the back case design.
Data Source
AI summary
A metallic back case (40) arranged on the back side of a main liquid crystal panel (20) included in a double-sided display liquid crystal module has an opening (42) that corresponds to a sub liquid crystal panel (60). A resin frame (50) is removably fitted in the opening (42), and the sub liquid crystal panel (60) is fitted to the resin frame (50). Thus, the sub liquid crystal panel (60) is kept out of direct contact with the back case (40).