Display Substrate Conductive Winding for Uniform Touch Resistance
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Solution Overview
Problem
Existing OLED display technologies face challenges in achieving uniform resistance across touch-control lines due to inconsistent lengths and spatial distribution, leading to varying resistances and affecting touch-control performance.
Innovation Solution
The display substrate incorporates conductive winding portions for touch-control lines arranged in independent and nested manners, ensuring uniform resistance by utilizing blocking dams and fan-out lead portions with dislocation structures to optimize wiring design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch-control lines are arranged in conventional straight patterns, then the wiring is simple, but the resistances of different touch-control lines vary significantly due to inconsistent lengths
Solution Approach 1:
The patent applies curvature by designing conductive winding portions that follow curved paths instead of straight lines. These winding portions are arranged in circular or arc-shaped patterns within the non-display area, allowing the touch-control lines to achieve more uniform lengths and resistances while maintaining connection between touch-control electrodes and external circuits
Solution Approach 2:
The patent implements nesting by placing multiple conductive winding portions of different touch-control lines in a nested arrangement within the non-display area. The winding portions are concentrically arranged or interlaced in a nested pattern, optimizing space utilization and ensuring uniform resistance distribution across all touch-control lines
2Length of stationary object
If the non-display area is reduced in width, then the display device becomes more compact, but there is insufficient space to arrange touch-control lines with uniform resistance
Solution Approach 1:
The patent transitions from one-dimensional straight-line wiring to two-dimensional curved winding patterns. By utilizing the radial and angular dimensions within the non-display area, the conductive winding portions can achieve uniform resistance distribution without requiring increased linear width, effectively using spatial arrangement in multiple dimensions to solve the resistance uniformity problem
Solution Approach 2:
The curved winding portions allow the touch-control lines to pack more efficiently within the limited non-display area width. The circular or arc-shaped paths enable the lines to maintain uniform lengths and resistances while occupying minimal linear space, achieving both compactness and resistance uniformity
3Reliability
If touch-control lines are made longer to reduce resistance, then the resistance decreases, but the wiring occupies more space and increases device complexity
Solution Approach 1:
The nested arrangement of conductive winding portions allows multiple touch-control lines to share the same spatial region in a compact, non-overlapping manner. This nesting optimizes space utilization, enabling the wiring to achieve sufficient length for low resistance while occupying minimal total area within the non-display region
Data Source
AI summary
Provided in the present disclosure are a display substrate and display apparatus. The display substrate comprises: a base substrate, comprising a display area and a non-display area around the display area; a blocking dam, located in the non-display area and arranged surrounding the display area; multiple touch-control lines, located in the non-display area, at least some touch-control lines comprise conductive winding portions, such that resistances of the touch-control lines are substantially same; an orthographic projection of a conductive winding portion on the base substrate is between an orthographic projection of the blocking dam on the base substrate and the display area; the at least some touch-control lines comprise multiple first touch-control lines and second touch-control lines, the conductive winding portion of each first touch-control line is arranged in an independent winding manner, conductive winding portions of all the second touch-control lines are arranged in a mutually nested winding manner.