Display and Sensor Layer Layout for Low-Interference Touch Panels
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Solution Overview
Problem
Touchscreen devices often suffer from reduced visual quality due to interference from the touch sensing layer, which affects the display panel's performance.
Innovation Solution
An electronic device is designed with a display layer and a sensor layer, where the sensor layer includes first and second sensing electrodes extending in different directions, and the display layer incorporates light emitting elements and overlap wires, along with a dummy overlap part to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch sensing layer is incorporated into the display panel, then touch input capability is enabled, but visual quality of the display panel is reduced
Solution Approach 1:
The patent introduces a dummy overlap part in the non-display area that extends in the row direction, creating a dimensional extension that balances the electrical interference pattern. This dummy structure compensates for the asymmetric interference caused by overlap wires, thereby improving visual quality while preserving touch sensing functionality in the display area.
Solution Approach 2:
The patent applies different structural configurations to different regions: the sensing electrodes are arranged with specific overlap patterns in the display area to enable touch sensing, while a dummy overlap part is added in the non-display area to compensate for interference. This localized differentiation resolves the contradiction by optimizing each region for its specific function.
2Ease of manufacture
If overlap wires are used to connect light emitting elements, then display structure is achieved, but interference with sensing electrodes occurs
Solution Approach 1:
The patent converts the harmful interference effect into a beneficial compensation mechanism. The dummy overlap part is deliberately designed to generate electrical interference that counterbalances the interference from the overlap wires, transforming a harmful effect into a solution that improves overall sensing accuracy while maintaining the manufacturable display structure.
3Area of stationary object
If sensing electrodes extend across the display area, then touch sensing coverage is improved, but interference with light emitting elements increases
Solution Approach 1:
The patent segments the sensing electrode structure into multiple components: first sensing electrodes extending in the column direction, second sensing electrodes extending in the row direction, and a dummy overlap part. This segmentation allows each component to perform its specific function while minimizing overall interference with light emitting elements in the display area.
Data Source
AI summary
An electronic device includes a display layer and a sensor layer. The sensor layer includes first sensing electrodes disposed in a sensing area and extending in a first direction, first trace lines electrically connected to the first sensing electrodes and overlapping the sensing area, second sensing electrodes disposed in the sensing area and extending in a second direction, and second trace lines electrically connected to the second sensing electrodes. The display layer includes light emitting elements, overlap wires extending in the second direction and overlapping a first group of light emitting element among the light emitting elements, and a dummy overlap part spaced apart from the overlap wires in the first direction.