Flexible Touch Electrode Layout to Prevent Display Touch Failure
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Solution Overview
Problem
Existing display devices face issues with touch failure, particularly in devices with flexible substrates, which can lead to inaccurate touch input detection.
Innovation Solution
The display device incorporates a touch sensor with a first and second sensing electrode system, including sub-sensing electrodes spaced apart in a touch area, connected to touch signal lines, and a substrate with a flexible polymer material to enhance touch input detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch sensor is implemented in a flexible display device, then touch input functionality is added, but touch failure occurs under bending or folding conditions
Solution Approach 1:
The sensing electrode is divided into multiple sub-sensing electrodes (first sub-sensing electrode and second sub-sensing electrode) spaced apart from each other. This segmentation allows the touch sensor to maintain detection capability even when portions of the electrode are affected by bending or folding stresses, preventing complete touch failure.
Solution Approach 2:
Different regions of the touch area are assigned different electrode configurations. The sub-sensing electrodes are strategically positioned to provide enhanced detection in critical areas, ensuring reliable touch input detection across various bending conditions while maintaining overall system adaptability.
2Reliability
If sub-sensing electrodes are spaced apart in the touch area, then touch failure is prevented, but device complexity increases
Solution Approach 1:
Multiple sub-sensing electrodes are electrically connected and function as an integrated sensing system. The first and second sub-sensing electrodes work together to detect touch inputs, combining their individual detection capabilities into a unified function that prevents touch failure without requiring completely separate detection mechanisms.
Solution Approach 2:
The spaced-apart sub-sensing electrodes serve multiple functions: they individually detect touch inputs in their respective zones, collectively prevent touch failure through redundant detection paths, and maintain the flexible display's bending capability. This multi-functionality reduces the need for additional specialized components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves touch input accuracy and prevents touch failure, especially in flexible display devices, by ensuring precise detection of touch inputs even under bending or folding conditions.
Implementation Method 1
a first sensing electrode extending in a first direction, the first sensing electrode including a first sub-sensing electrode and a second sub-sensing electrode spaced apart from each other in a touch area which senses a touch input
Data Source
AI summary
A display device is provided. The display device includes a first sensing electrode extending in a first direction, the first sensing electrode including a first sub-sensing electrode and a second sub-sensing electrode spaced apart from each other in a touch area which senses a touch input; a second sensing electrode extending in a second direction intersecting the first direction, the second sensing electrode including a third sub-sensing electrode and a fourth sub-sensing electrode spaced apart from each other in the touch area; a first touch signal line connected to the first sub-sensing electrode and the second sub-sensing electrode; and a second touch signal line connected to the third sub-sensing electrode and the fourth sub-sensing electrode.