Display Edge Connection Board Pad Layout for Short-Circuit Prevention
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Solution Overview
Problem
Existing display devices face challenges in reducing defects such as short circuits between pads, particularly in high-resolution displays with rigid structures and reduced bezel areas, where the connection circuit board design fails to ensure reliable electrical connections.
Innovation Solution
The proposed display device incorporates a connection circuit board with a specific arrangement of pads and vertical arrangement pads, where the second pad has a greater width than the first pad, and additional pads are strategically placed to increase the gap between pads, reducing the likelihood of short circuits and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If pads are arranged closely to reduce bezel area, then the display area is increased, but the risk of short circuit between pads increases
Solution Approach 1:
The patent introduces a third dimension (vertical stacking) by arranging pads in multiple layers - first row pads, second row pads, and third row pads at different vertical positions. This allows horizontal space to be minimized for display area while maintaining adequate separation between pads through vertical distancing, thus resolving the contradiction between maximizing display area and preventing short circuits.
Solution Approach 2:
The pad arrangement is segmented into multiple distinct rows (first, second, and third rows) with different widths and positioning. The second row pads have greater width than first row pads, and additional pads are strategically placed to create buffer zones. This segmentation allows optimization of each row's function while maintaining overall reliability.
2Reliability
If additional pads are added to increase gap between pads, then short circuit risk is reduced, but device complexity increases
Solution Approach 1:
Additional pads act as intermediary elements or buffer zones between the first and third row pads. These intermediate pads create necessary spacing and electrical isolation without requiring complete redesign of the entire pad structure. The intermediary pads simplify the overall design by providing a straightforward method to increase gaps and prevent short circuits.
Data Source
AI summary
A display device includes a display panel including an edge extending along a first direction, a main circuit board adjacent to the edge of the display panel, and a connection circuit board which connects the main circuit board to the display panel at the edge thereof. The connection circuit board includes a plurality of board side pads which are arranged along the first direction and at which the connection circuit board is connected to the main circuit board. Each of the plurality of board side pads includes a first pad, and a second pad adjacent to the first pad along the first direction. The second pad includes a plurality of signal pads which are arranged along a second direction which crosses the first direction and are each aligned with the first pad along the first direction.