Display Pad and PCB Layout to Minimize Visible Dead Space
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Solution Overview
Problem
The presence of non-display areas in display devices reduces user immersion due to visible non-functional spaces.
Innovation Solution
A display device design featuring a substrate with a display part and a pad part protruding in a second direction, where the pad part has a narrower width than the display part, and a printed circuit board with a concave-convex shape aligned with the pad part, reducing the visible dead space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the non-display area (dead space) is reduced to enhance user immersion, then user immersion is improved, but the space available for functional components (pad, fan-out line, printed circuit board) is reduced
Solution Approach 1:
The pad part is designed to protrude from the display part in a direction crossing the display width direction, utilizing the second direction (depth dimension) to accommodate functional components. This dimensional transition allows the non-display area to be minimized in the display width direction while still providing sufficient space for pads and circuit boards in the protruding direction.
Solution Approach 2:
The printed circuit board is designed with a concave-convex shape that corresponds to the pad part's protruding shape. The concave portion of the circuit board receives and integrates with the pad part, creating a nested configuration. This allows functional components to be embedded within the minimized non-display area rather than requiring additional external space.
2Area of stationary object
If the pad part width is reduced to minimize dead space, then dead space is reduced, but the electrical connection capability may be compromised
Solution Approach 1:
The printed circuit board's concave-convex structure creates a nested fit with the pad part. The concave portion of the circuit board receives the pad part, increasing the effective contact area and connection reliability despite the reduced pad part width. This nested configuration ensures stable electrical connection while maintaining minimal dead space.
Solution Approach 2:
The integration of the pad part with the printed circuit board through the concave-convex interface creates a composite structure that combines the electrical connection functions of both components. This composite configuration enhances connection reliability by distributing electrical pathways across the integrated interface rather than relying solely on the pad part width.
Data Source
AI summary
A display device includes a substrate including a display part having a first width in a first direction and a pad part protruding from the display part in a second direction crossing the first direction and having a second width in the first direction, the second width being smaller than the first width, and a printed circuit board having a concave-convex shape towards the substrate. As the printed circuit board has the concave-convex shape, a dead space of the display device is reduced.