Touch Panel Noise Detection Wire for Cathode Defect Isolation
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Solution Overview
Problem
Current display devices face challenges in detecting noise caused by poor deposition of the cathode electrode, which can lead to defects and affect touch input accuracy.
Innovation Solution
A touch panel design is introduced that includes a noise detection wire system, insulated from the touch signal wires, to detect noise and cathode deposition defects, featuring a first noise detection wire arranged between the second touch signal wire and the touch ground wire, and a touch antistatic wire, allowing for effective noise detection and defect identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch panel is used to detect touch input, then touch input recognition is enabled, but noise caused by poor cathode electrode deposition affects touch input accuracy
Solution Approach 1:
The patent divides the touch panel into functional regions: a touch sensing area for detecting touch inputs and a non-touch area for noise detection. The noise detection wire is separately arranged in the non-touch area, isolated from the touch signal wires, to detect noise without interfering with touch input detection. This segmentation allows independent optimization of touch sensing and noise detection functions.
Solution Approach 2:
The patent introduces a noise detection wire as an intermediary element that mediates between the cathode electrode deposition quality and the touch signal. This noise detection wire acts as a separate sensing channel that can detect noise caused by poor cathode deposition without being part of the touch signal path, thus preventing noise from affecting touch input accuracy.
2Reliability
If noise detection is added to detect cathode deposition defects, then defect detection capability is improved, but device complexity increases
Solution Approach 1:
The noise detection wire serves multiple functions: it detects noise caused by poor cathode electrode deposition, identifies deposition defects, and can be integrated into the existing touch panel structure without requiring a completely separate detection system. By making the noise detection function part of the existing touch panel architecture, the patent reduces the increase in device complexity.
Solution Approach 2:
The patent adds a new dimension to the touch panel structure by introducing a separate noise detection wire in the non-touch area. This additional spatial dimension allows noise detection without interfering with the touch sensing area, enabling defect detection while maintaining a relatively simple overall structure through strategic placement rather than complex integration.
Data Source
AI summary
A display device including a display panel, and a touch member disposed on the display panel. The touch member includes a first sensing electrode extending in a first direction, a second sensing electrode extending in a second direction crossing the first direction, a first touch signal wire electrically connected to the first sensing electrode, a second touch signal wire electrically connected to the second sensing electrode, and a first noise detection wire electrically insulated from the first sensing electrode, the second sensing electrode, the first touch signal wire, and the second touch signal wire.