Foldable Display Support Film for Foreign Particle Blocking
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Solution Overview
Problem
Foldable display devices face reliability issues due to the ingress of foreign substances through gaps between support plates and the flexible display module, which can compromise their performance and durability.
Innovation Solution
A foldable display device design that includes a flexible display module, a case with hinge portions, and support plates with protective films to cover the back surface of the folding portion, preventing foreign substances from entering and enhancing the device's reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If support plates are used to support the flexible display module, then structural support is improved, but gaps between support plates allow foreign substances to enter
Solution Approach 1:
A protective film is introduced as an intermediary component between the support plates and the flexible display module. The protective film fills the gaps between support plates, preventing foreign substances from entering while maintaining the structural support function of the support plates.
Solution Approach 2:
A flexible protective film is used to cover the back surface of the flexible display module in the folding portion. This thin film structure prevents foreign substance ingress through gaps while accommodating the flexibility and folding movements of the display module.
2Ease of manufacture
If the folding portion is left exposed between support plates, then ease of assembly is improved, but reliability deteriorates due to foreign substance entry
Solution Approach 1:
The protective film is attached to the support plates before final assembly, preliminarily covering the exposed folding portion. This preliminary action ensures that the folding portion is protected from foreign substances from the beginning, maintaining reliability while keeping the assembly process simple.
3Reliability
If protective films are added to cover the folding portion, then reliability is improved, but device complexity increases
Solution Approach 1:
The protective film serves multiple functions: it prevents foreign substance ingress, protects the folding portion during assembly and operation, and maintains the aesthetic appearance. This multi-functionality achieves improved reliability without adding significant structural complexity.
Data Source
AI summary
A foldable display device includes a flexible display module, a case, first and second support plates, and a first protective film. The flexible display module includes a display surface and a back surface opposing the display surface. The case is on the back surface and includes: a hinge portion, and first and second covers rotatably coupled to the hinge portion in first and second directions, respectively. The second direction is opposite the first direction. The first support plate is between the flexible display module and the first cover, and supports a first side portion of the flexible display module. The second support plate is between the flexible display module and the second cover, and supports a second side portion of the flexible display module. The first protective film is coupled between the first and second support plates, and covers the back surface exposed between the first and second support plates.