Display Device Circuit Board Overlap via Flexible Wiring Holes
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Solution Overview
Problem
Conventional display devices with small screen sizes face challenges in ensuring sufficient space for circuit boards and flexible wiring boards, which restricts layout design and prevents overlap due to the need to avoid covering connectors.
Innovation Solution
A display device configuration where the circuit board is fixed to a lower frame via holes in a flexible wiring board, allowing the circuit board and flexible wiring board to overlap, with convex portions supporting the circuit board and preventing damage from connector insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circuit board and flexible wiring board are disposed to not overlap on the rear face, then the connector functionality is maintained, but the rear face space requirement increases
Solution Approach 1:
The patent transitions from a two-dimensional non-overlapping layout to a three-dimensional overlapping configuration. The flexible wiring board is routed through the circuit board to allow both components to occupy the same projected area on the rear face, effectively utilizing the third dimension (depth/thickness) to resolve the space conflict while maintaining electrical connectivity through the connector.
Solution Approach 2:
The flexible wiring board is nested through the circuit board structure. Specifically, the flexible wiring board passes through holes in the circuit board, allowing it to be positioned between the display panel and the circuit board in certain regions. This nesting arrangement enables both components to coexist in a compact overlapping configuration.
2Area of stationary object
If the circuit board and flexible wiring board are disposed in a limited space, then the device size is reduced, but the layout design is restricted
Solution Approach 1:
By introducing the third dimension of overlapping placement, the patent expands the available layout space. The flexible wiring board can be routed through the circuit board at strategic locations, creating multiple possible configuration paths that were not available in strict two-dimensional non-overlapping layouts, thereby improving design flexibility within compact spaces.
Solution Approach 2:
The circuit board is segmented with holes that allow the flexible wiring board to pass through. This segmentation creates distinct zones: areas where the flexible wiring board is exposed between the display panel and circuit board, and areas where it is covered by the circuit board. This segmented approach enables flexible routing options and simplifies the manufacturing process by allowing standardized hole patterns.
3Area of stationary object
If the flexible wiring board covers the connector, then the space is optimized, but the connector functionality is compromised
Solution Approach 1:
The patent extracts the flexible wiring board from the area directly covering the connector by routing it through holes in the circuit board at locations that avoid the connector mounting area. This extraction ensures that the connector remains accessible and functional while the flexible wiring board still achieves space-efficient overlapping placement in other regions of the rear face.
Solution Approach 2:
The patent applies different spatial arrangements in different local regions: in the connector area, the circuit board maintains full coverage to ensure connector functionality, while in other regions, the flexible wiring board is exposed between the display panel and circuit board to achieve space optimization. This localized differentiation resolves the conflict between space efficiency and functional reliability.
Data Source
AI summary
A display device includes a display panel, a case that has a middle frame disposed around the display panel and a lower frame disposed on the display panel on the opposite side from a display face, a circuit board that has a circuit for performing display control of the display panel, a flexible wiring board at least a part of which is disposed between the lower frame of the case and the circuit board for electrically connecting the display panel with the circuit board, and a connector that is mounted on the circuit board on the opposite side from the flexible wiring board for electrically connecting to the outside, wherein the flexible wiring board has holes, and the circuit board is fixed to the lower frame via the holes of the flexible wiring board.