Touch Sensor Layout With Blocking Electrode for Edge Coordinate Accuracy
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Solution Overview
Problem
Existing display devices face challenges in accurately detecting touch coordinates near the edges of the active region due to electrical coupling between sensor parts and signal lines, leading to reduced touch recognition accuracy.
Innovation Solution
The display device incorporates a blocking electrode in the peripheral region to prevent electrical coupling between sensor parts and signal lines, with sensor parts and signal lines connected to touch sensors arranged in specific configurations to enhance touch detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If sensor parts are arranged adjacent to the peripheral region to enable edge touch detection, then touch detection coverage is improved, but electrical coupling between sensor parts and signal lines increases causing reduced detection accuracy
Solution Approach 1:
The display device is divided into distinct functional regions: an active region for touch sensing and a peripheral region for signal line routing. This spatial segmentation allows sensor parts to be positioned adjacent to the peripheral region for comprehensive edge touch detection while signal lines are routed in a separate zone to minimize electrical coupling interference.
Solution Approach 2:
A blocking electrode is introduced as an intermediary element positioned between the sensor parts and signal lines in the peripheral region. This blocking electrode prevents direct electrical coupling between the sensor parts and signal lines, thereby maintaining touch detection accuracy while allowing sensor parts to be arranged for maximum coverage.
2Ease of manufacture
If connection parts are disposed adjacent to the peripheral region to connect sensor parts, then manufacturing complexity is reduced, but electrical interference between connection parts and signal lines increases
Solution Approach 1:
The device structure is segmented into an active region containing sensor parts and connection parts, and a peripheral region containing signal lines. This spatial separation allows connection parts to be disposed adjacent to the peripheral region for manufacturing simplicity while signal lines are positioned to minimize electrical interference.
Solution Approach 2:
A blocking electrode serves as an intermediary barrier between connection parts and signal lines in the peripheral region, preventing electrical interference while allowing both components to be positioned for ease of manufacture and assembly.
3Volume of moving object
If signal lines are routed close to sensor parts for compact design, then device compactness is improved, but electrical coupling between signal lines and sensor parts increases reducing signal quality
Solution Approach 1:
The display device is divided into an active region for touch sensing and a peripheral region for signal line routing. This segmentation allows signal lines to be routed close to sensor parts within the compact active region while maintaining sufficient spacing through the peripheral region to reduce electrical coupling and preserve signal transmission reliability.
Solution Approach 2:
A blocking electrode is positioned as an intermediary between signal lines and sensor parts in the peripheral region, preventing direct electrical coupling. This allows the device to maintain a compact design with signal lines routed close to sensor parts while the blocking electrode ensures signal transmission reliability by eliminating electrical interference.
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
The solution improves touch recognition accuracy near the edges of the active region by minimizing electrical interference, ensuring precise detection of touch coordinates using a touch pen or user contact.
Implementation Method 1
a blocking electrode which prevents electrical coupling between the sensor parts and signal lines
Data Source
AI summary
Provided is a display device including a display panel including an active region and a peripheral region adjacent to the active region, n first touch sensors which are arranged successively along a first direction, extend in a second direction, each include a plurality of first connecting parts and a plurality of first sensor parts connected through the first connecting parts, and each generate an electric field together with an external touch pen; m second touch sensors which are insulated from the n first touch sensors, extend successively along the first direction, are arranged in the second direction, each includes a plurality of second connecting parts and a plurality of second sensor parts connected through the second connecting parts, and each generates an electric field together with an external touch pen.