Touch Device Shielding Line Virtual Key Integration
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Solution Overview
Problem
Existing touch panels face challenges in reducing the area occupied by signal lines, which limits the enlargement of the display screen due to the significant space required by virtual keys and peripheral circuits.
Innovation Solution
A touch device and driving method that incorporate a self-sensing line, virtual key, and shielding line to form a shielding structure, reducing the space needed for signal lines by shielding driving lines from sensing lines, allowing for a slim border design and increased display screen size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If virtual keys are configured in the peripheral region of the touch panel, then function keys can be provided, but the area occupied by signal lines increases and the display screen area is reduced
Solution Approach 1:
The patent merges the shielding line and virtual key signal line into a single integrated structure. The shielding line is electrically connected to the virtual key, allowing it to serve dual purposes: shielding driving lines from sensing lines and transmitting signals for virtual key detection. This consolidation eliminates the need for separate signal lines, reducing the peripheral region area and increasing the display screen area.
Solution Approach 2:
The shielding line is designed to perform multiple functions simultaneously: it acts as a shielding structure to prevent signal interference between driving and sensing lines, and it serves as the signal transmission path for the virtual key. This multi-functionality reduces the overall number of components needed in the peripheral region, solving the space constraint problem.
2Reliability
If shielding lines are added to shield driving lines from sensing lines, then signal interference is prevented, but the area occupied by signal lines increases
Solution Approach 1:
The patent combines the shielding function and virtual key signaling function into a single line structure. The shielding line is electrically connected to the virtual key, allowing it to serve as both the shielding structure and the signal transmission path for virtual key detection. This eliminates the need for separate shielding lines and virtual key signal lines, reducing the total signal line area while maintaining effective shielding.
Data Source
AI summary
A touch device includes a touch panel that includes driving lines, sensing lines, a virtual key, a self-sensing line, and a shielding line. The touch panel has a display region and a non-display region. The driving lines extend along a first direction in the display region and further extend into the non-display region. The sensing lines extend along a second direction in the display region and extend into the non-display region. The first direction is different from the second direction. The virtual key is located in the non-display region and between the driving lines and the sensing lines to shield the driving lines from the sensing lines. Each of the self-sensing line and the shielding line is located in the non-display region, connected to the virtual key, and located between the driving lines and the sensing lines to shield the driving lines from the sensing lines.