Touch Connection Pattern Width Variation for Display Device Short-Circuit Prevention
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Solution Overview
Problem
Display devices face issues with short-circuits between driving electrodes and sensor electrodes in touch members, affecting the reliability and performance of touch input detection.
Innovation Solution
A display device design featuring a touch member with a first touch conductive layer, a second touch conductive layer, and a first touch insulating film, where the first touch connection pattern includes a first connecting area and a second connecting area with a larger width, electrically connecting first and second touch sensor patterns without overlapping with emission areas, thereby preventing short-circuits and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the touch connection pattern uses a uniform width design, then the manufacturing process is simpler, but short-circuits between sensor electrodes may occur reducing reliability
Solution Approach 1:
The touch connection pattern is designed with varying width: a first width in the first region and a second width (greater than the first width) in the second region. This local variation in geometric properties provides enhanced electrical insulation between sensor electrodes in regions where short-circuits are more likely, while maintaining simpler geometry in other areas, thus resolving the contradiction between reliability and manufacturing complexity.
2Area of stationary object
If the touch sensor patterns are placed closer together to increase sensing area, then touch detection capability improves, but the risk of short-circuit between electrodes increases
Solution Approach 1:
The connection pattern employs different widths in different regions: a narrower first width in the first region and a wider second width in the second region where sensor electrodes are positioned. This allows the sensor patterns to be placed closer together to increase sensing area while the widened second region provides sufficient electrical insulation to prevent short-circuits, thus resolving the contradiction between sensing area and electrical insulation.
3Reliability
If the width of the touch connection pattern is increased to prevent short-circuits, then electrical insulation improves, but the available space for other components is reduced
Solution Approach 1:
The connection pattern uses a width variation strategy: a first width in the first region and a second width (greater than the first width) only in the second region where insulation is critical. This localized widening provides necessary electrical insulation to prevent short-circuits while minimizing the overall area occupied by the connection pattern, thus resolving the contradiction between electrical insulation and available space.
4Area of stationary object
If the touch connection pattern overlaps with emission areas to optimize layout, then space utilization improves, but display quality deteriorates due to light blocking
Solution Approach 1:
The connection pattern is designed with varying width where the second region with greater width provides enhanced electrical insulation while the overall pattern is configured to minimize overlap with emission areas. This allows optimized space utilization in the non-emission area while maintaining display quality by reducing light blocking, resolving the contradiction between space utilization and illumination quality.
Data Source
AI summary
A display device including: a display panel; and a touch member on the display panel and including a first touch conductive layer, a second touch conductive layer, and a first touch insulating film between the first touch conductive layer and the second touch conductive layer, wherein the first touch conductive layer includes a first touch connection pattern including a first connecting area and a second connecting area having a larger width than that of the first connecting area, wherein the second touch conductive layer includes first touch sensor patterns connected by the first touch connection pattern, second touch sensor patterns insulated from the first touch sensor patterns, and a second touch connection pattern connecting the second touch sensor patterns with one another, and wherein the second connecting area of the first touch connection pattern is between the first touch sensor pattern and the second touch sensor pattern facing each other.