Display Panel Corner Area Circuit Layout for Stress Management
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Solution Overview
Problem
Current display technologies face challenges in increasing the display area while maintaining reliability, particularly in curved and bendable display panels where stress and curvature can lead to structural integrity issues and reduced performance.
Innovation Solution
The display panel design includes a substrate with a central area and corner areas that are bendable, featuring a pixel circuit, display element, voltage supply line, and driving circuit, where the driving circuit is spaced apart from the central area with the voltage supply line in between, and a thin-film encapsulation layer with inorganic and organic layers to manage stress, along with input lines and conductive layers to enhance signal transmission and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the display area is increased by extending into corner areas, then the display area is improved, but the structural integrity and reliability deteriorate due to stress and curvature
Solution Approach 1:
The display panel is divided into a central area and corner areas, with the corner areas being bendable and extendable. This segmentation allows the display area to be increased without compromising the structural integrity of the main display region, as the corner areas can independently accommodate stress and curvature.
Solution Approach 2:
The patent employs flexible thin-film encapsulation layers and bendable substrate structures in the corner areas, enabling these regions to be curved and extended without breaking. This flexibility allows the display area to expand into corner regions while maintaining reliability through stress accommodation.
2Device complexity
If the driving circuit is placed closer to the central area to reduce complexity, then device complexity is improved, but signal transmission quality deteriorates
Solution Approach 1:
A voltage supply line is introduced as an intermediary element between the driving circuit and the central area. This voltage supply line serves as a buffer and reference potential pathway, allowing the driving circuit to be positioned in the corner area while maintaining signal integrity and reducing interference with the central display operations.
3Use of energy by moving object
If the voltage supply line is positioned to supply voltage to display elements, then electrical function is improved, but stress concentration and reliability deteriorate
Solution Approach 1:
The voltage supply line is positioned specifically in the corner area rather than uniformly across the entire panel. This local positioning ensures adequate voltage supply to the extended display regions while concentrating the electrical function where needed and minimizing stress concentration in the central and high-stress areas.
Data Source
AI summary
A display panel includes a substrate including a central area and a corner area extending from a corner of the central area, a pixel circuit disposed in the central area and a display element connected to the pixel circuit, a voltage supply line which is disposed in the corner area and supplies a voltage to one electrode of the display element, and a driving circuit which is disposed in the corner area and supplies an electrical signal to the pixel circuit. The driving circuit is spaced apart from the central area with the voltage supply line therebetween.