Touch Panel Display Device with Segmented Connection Lines
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Solution Overview
Problem
Touch panel display devices face challenges in connecting sensor electrodes due to their shape, which can lead to insufficient line connections, affecting touch detection accuracy and reliability.
Innovation Solution
The implementation of a touch panel display device with sensor electrodes arranged in a matrix and electrode drivers in a peripheral area, where lines are connected to the electrodes in a specific pattern to ensure proper contact, including first and second lead portions that are coupled via a coupling line, allowing for effective touch detection even with odd-shaped sensor electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sensor electrodes are arranged in odd shapes to fit display areas, then adaptability to display layouts is improved, but line connection reliability deteriorates
Solution Approach 1:
The connection line is divided into multiple segments including a first lead portion extending from the sensor electrode, a second lead portion extending toward the terminal, and a coupling line connecting these portions. This segmentation allows each segment to be independently routed to navigate around odd-shaped electrode boundaries, ensuring reliable connection while adapting to complex display layouts.
Solution Approach 2:
The connection line transitions from simple linear extension to multi-dimensional routing by introducing coupling lines that extend in directions different from the main electrode orientation. This dimensional flexibility enables the line to connect odd-shaped electrodes to terminals even when direct linear paths are blocked by electrode geometry.
2Area of stationary object
If connection lines are extended to reach odd-shaped sensor electrodes, then connection coverage is improved, but line complexity increases
Solution Approach 1:
The connection line structure is simplified in regions where direct connection is possible, while introducing coupling portions only where needed to navigate odd-shaped electrode geometries. This localized complexity approach ensures adequate connection coverage without unnecessarily increasing overall line complexity in areas where simple linear connections suffice.
3Measurement precision
If multiple lead portions and coupling lines are used to connect sensor electrodes, then touch detection accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The first lead portion, second lead portion, and coupling line are integrated into a single continuous connection line structure that can be formed in one manufacturing process step. This merging approach ensures precise electrical connection for accurate touch detection while avoiding the need for multiple separate connection components that would complicate manufacturing.
Data Source
AI summary
According to one embodiment, a touch panel display device includes sensor electrodes, an electrode driver, and lines for connection between the electrode driver and the sensor electrodes. The sensor electrodes include first and second electrodes. The lines include first and second lines connected to the first and second electrodes. The second line includes first portions drawn in a direction opposite to terminals of the electrode driver, and a second portion drawn in a direction to the terminals. The first portions are connected to one another via a coupling line.