Display Panel Wiring Cross-Sectional Area Adjustment
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Solution Overview
Problem
Display devices with components surrounded by a display area face challenges in reducing luminance deviation among display elements, leading to inconsistent light emission due to differences in wiring resistance and cross-sectional areas.
Innovation Solution
A display panel design featuring a substrate with a component area surrounded by a display area, where the first and second wirings have different lengths, cross-sectional areas, and thicknesses, connected to thin-film transistors, and spaced apart to reduce resistance differences and luminance deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display area surrounds the component area, then various functions can be added while enlarging the display area, but luminance deviation occurs among display elements due to differences in wiring resistance and cross-sectional areas
Solution Approach 1:
The patent applies local quality by making the cross-sectional areas of different wirings non-uniform. Specifically, wirings closer to the component area have larger cross-sectional areas to compensate for higher resistance, while wirings farther away have smaller cross-sectional areas. This localized adjustment of wiring properties ensures uniform luminance across the display area surrounding the component area.
Solution Approach 2:
The patent changes the parameter of wiring cross-sectional area to resolve the luminance deviation issue. By adjusting the cross-sectional area of each wiring based on its distance from the component area, the patent compensates for resistance differences and achieves uniform luminance output across all display elements.
2Area of stationary object
If wirings are extended to connect display elements around the component area, then the display area can be enlarged, but wiring resistance differences cause inconsistent light emission
Solution Approach 1:
The patent applies local quality by assigning different cross-sectional areas to wirings based on their specific location and distance from the component area. This localized differentiation in wiring properties compensates for the varying resistance encountered by different wirings, ensuring that all display elements emit light consistently despite the extended wiring paths.
Solution Approach 2:
The patent changes the physical parameter of wiring cross-sectional area to balance the electrical resistance across different wiring paths. By increasing the cross-sectional area of wirings that extend farther from the component area, the patent reduces their resistance to match that of shorter wirings, thereby ensuring reliable and consistent light emission across the enlarged display area.
Data Source
AI summary
A display panel includes a substrate including a component area, a display area at least partially surrounding the component area, and a first non-display area at least partially surrounding the display area. A first wiring is in the display area and extends in a first direction to face the component area. A second wiring is in the display area and extends in the first direction to face the component area. The second wiring is spaced apart from the first wiring with the component area therebetween. A pixel circuit is connected to one of the first and second wirings and includes at least one thin-film transistor. A display element is connected to the pixel circuit. A cross-sectional area of the first wiring crossing in a second direction that is perpendicular to the first direction is different from a cross-sectional area of the second wiring crossing in the second direction.