Foldable Display Power Routing for Narrow Bezels and Uniform Brightness
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Solution Overview
Problem
Display apparatuses face challenges in minimizing non-display areas while maintaining satisfactory luminous uniformity, as existing designs often result in increased size due to wiring and power supply structures.
Innovation Solution
The display apparatus incorporates a substrate with a display area, adjacent non-display areas, and a bending area, featuring a fan-out portion and power supply structures with conductive lines and connection lines strategically positioned to minimize overlap and optimize heat distribution, using a multi-line structure and oblique sections to reduce the width of non-display areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wiring and power supply structures are included in the display apparatus, then the display function is enabled, but the non-display area increases in size
Solution Approach 1:
The patent transitions from a planar wiring layout to a three-dimensional stacked configuration. Multiple power supply portions (first, second, third power supply portions) are positioned at different vertical levels, with connection lines extending between layers. This vertical stacking enables compact routing of power and signal lines without expanding the horizontal non-display area, effectively resolving the contradiction between functional reliability and area minimization.
Solution Approach 2:
The patent implements nested wiring structures where connection lines are routed through intermediate regions and overlap with existing structural layers. The first connection line connects conductive lines through the first non-display area, while the second connection line similarly routes through the second non-display area, creating a nested configuration that minimizes additional space requirements while maintaining electrical connectivity.
2Reliability
If conductive lines are positioned in non-display areas, then power supply is achieved, but luminous uniformity deteriorates due to heat concentration
Solution Approach 1:
The patent divides the power supply structure into multiple segmented portions (first power supply portion, second power supply portion, third power supply portion) positioned at different locations and vertical levels. This segmentation distributes the current flow paths and heat generation points across multiple discrete regions rather than concentrating them in a single area, thereby reducing localized heat buildup and improving luminous uniformity across the display.
Solution Approach 2:
The patent applies different spatial configurations to different power supply portions based on their functional requirements. The first power supply portion is positioned in the first non-display area, the second in the second non-display area, and the third in the bending area, with each having optimized connection line routing. This localized optimization ensures that heat distribution is managed differently in each region, preventing uniform heat concentration and maintaining luminous uniformity.
Data Source
AI summary
A display apparatus includes a substrate, a display unit, a wire structure, and a first power supply structure. The substrate includes a display area, a first non-display area neighboring the display area, a second non-display area, and a bending area between the first non-display area and the second non-display area. The display unit is on the display area. The wire structure is on the first non-display area, the bending area, and the second non-display area and includes a first wire set and a second wire set overlapping the bending area and spaced from each other. The first power supply structure includes a first conductive line and a second conductive line on the first non-display area and the second non-display area, respectively, and includes a connection line connecting the first conductive line to the second conductive line and positioned between the first wire set and the second wire set. optimized.