Polygon Flexible Circuit for Thinner LCD Modules
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Solution Overview
Problem
Conventional LCD display modules face challenges in achieving a thinner design and improved signal performance due to the limitations of traditional flexible printed circuits, which restrict the spacing of electronic components and lead to increased electromagnetic interference.
Innovation Solution
The implementation of a polygon flexible printed circuit with varying end widths, connecting a driver integrated circuit between a printed circuit board assembly and a glass substrate, along with a shielding can to reduce electromagnetic interference, allows for closer component spacing and improved signal quality, resulting in a thinner and larger display viewing area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional flexible printed circuit is used, then the circuit board can connect components, but the component spacing is restricted and electromagnetic interference increases
Solution Approach 1:
The flexible printed circuit board employs an asymmetric polygon shape with a first end width at the glass substrate connection and a second end width at the printed circuit board assembly connection, where the end widths are different. This asymmetric geometry optimizes component spacing while reducing electromagnetic interference by strategically positioning components away from high-interference zones.
Solution Approach 2:
The circuit board applies local quality by having different widths at different ends of the same component, allowing optimal spacing in critical areas while maintaining compact overall dimensions. The varying width profile enables closer spacing near the glass substrate where needed while providing broader spacing near the PCB assembly to reduce electromagnetic interference.
2Length of stationary object
If conventional flexible printed circuits are used, then connections are established, but the display module thickness cannot be reduced
Solution Approach 1:
The asymmetric polygon shape of the flexible printed circuit board enables optimized spatial arrangement that reduces the overall display module thickness. By having different widths at each end, the circuit board can be configured to fit more efficiently within the limited z-axis space while maintaining all necessary electrical connections.
3Ease of manufacture
If uniform width flexible circuits are used, then manufacturing is simplified, but component spacing optimization is limited
Solution Approach 1:
While the polygon shape with varying end widths adds geometric complexity, the flexible printed circuit technology enables this asymmetric configuration to be manufactured using standard flexible PCB fabrication processes. The asymmetric design optimizes component spacing by providing different available spaces at different locations along the circuit board length.
Data Source
AI summary
An LCD display module includes a polygon flexible printed circuit to produce a thinner display. The polygon flexible printed circuit connects a driver integrated circuit to a printed circuit board assembly and a glass substrate. The polygon flexible printed circuit has a narrow minor end connected to the glass substrate and a wider major end connected to the printed circuit board assembly. Because the polygon flexible printed circuit has different end widths, the polygon flexible printed circuit permits reduced spacing of electronic components in proximity of the narrower minor end. The LCD display module also includes a shielding can in physical communication with the printed circuit board assembly to reduce electromagnetic interference between the printed circuit board and the polygon flexible printed circuit.