Flexible Display Pad Connector for Voltage Drop Reduction
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Solution Overview
Problem
Flexible displays experience luminance deviation due to voltage drop, affecting display quality and visibility, especially when bent or folded.
Innovation Solution
A display device with a substrate having a display area, first and second pad areas, and a connector to electrically connect these areas when bent, ensuring power source voltage is efficiently supplied to pixels, reducing voltage drop and luminance deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the driver is coupled to an end of the flexible substrate, then the display device can be manufactured with a simple structure, but luminance deviation occurs due to voltage drop
Solution Approach 1:
The patent divides the power supply structure by creating multiple pad areas (first pad area and second pad area) at opposite ends of the flexible substrate, each connected to different pixels. This segmentation allows power to be supplied from multiple locations, reducing voltage drop and luminance deviation while maintaining manufacturing simplicity.
2Adaptability or versatility
If the flexible substrate is bent or folded, then the display device achieves flexibility and adaptability, but voltage drop increases causing luminance deviation
Solution Approach 1:
The patent creates equipotential regions by placing pad areas at both ends of the flexible substrate and connecting them through the bending path. When the substrate is bent, the overlapping pad areas maintain electrical connection, ensuring uniform voltage distribution across the display even during flexing, thus preventing luminance deviation.
3Device complexity
If power is supplied from a single location, then the circuit design is simple, but voltage drop causes luminance deviation affecting display quality
Solution Approach 1:
The patent applies local quality by creating different pad area configurations at opposite ends of the flexible substrate. Each pad area is locally optimized to connect to nearby pixels, with the first pad area connected to first pixels and the second pad area connected to second pixels. This local optimization ensures uniform power distribution and consistent display quality across the entire flexible display.
Data Source
AI summary
A display device includes a substrate and a connector. The substrate includes a display area, a first pad area, and a second pad area. The display area has a plurality of pixels. The first pad area and the second pad area are adjacent respective sides of the display area and are connected to different ones of the pixels. The connector connects the first pad area and the second pad area when the substrate is bent.