Sensor Layer Segmentation for Display Signal Noise Reduction
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Solution Overview
Problem
Current display devices with sensor layers face limitations in sensing performance due to the complexity of electrode connections and driver configurations, which affect the accuracy and efficiency of external input detection.
Innovation Solution
A display device design featuring a sensor layer with distinct areas and drivers connected through specific pad areas and circuit films, where the sensor layer includes intersecting electrodes and connecting lines to improve sensing performance by minimizing noise and optimizing signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple drivers are used to connect with the sensor layer through separate pad areas, then sensing performance and signal transmission quality are improved, but device complexity increases
Solution Approach 1:
The sensor layer is divided into multiple distinct areas (first area, second area, third area), each with its own driver connection. This segmentation allows independent optimization of signal transmission for each region, improving overall sensing performance while managing complexity through modular organization.
Solution Approach 2:
Circuit films are introduced as intermediary components between the drivers and the sensor layer electrodes. These circuit films facilitate electrical connection while providing a structured interface that simplifies the overall system architecture and manages the complexity of multiple driver connections.
2Measurement precision
If electrodes are densely arranged to improve detection accuracy, then measurement precision improves, but noise interference increases
Solution Approach 1:
The electrode connections are extracted and routed through separate circuit films that are spaced from the sensor layer areas. This extraction separates the high-density electrode network from the driver connections, reducing electromagnetic interference and noise while maintaining detection accuracy.
Solution Approach 2:
The circuit films provide equipotential connection paths between the electrodes and drivers, stabilizing voltage levels and reducing noise interference. By maintaining consistent potential references across the sensor layer, the system achieves better signal-to-noise ratio despite dense electrode arrangement.
3Volume of moving object
If pad areas are positioned close to the sensor layer for compact design, then device compactness improves, but signal timing consistency deteriorates
Solution Approach 1:
The circuit films are positioned in a spatial arrangement that optimizes signal transmission paths. By utilizing the third dimension (vertical spacing between circuit film and sensor layer), the design achieves compact footprint while maintaining adequate signal transmission distance for timing consistency.
Data Source
AI summary
A display device includes: a display panel including: a display layer; and a sensor layer on the display layer, and including first, second, and third areas; a first driver electrically connected with the sensor layer through a first pad area; and a second driver electrically connected with the sensor layer through a second pad area. The sensor layer includes: a plurality of electrodes at the first, second, and third areas; a plurality of first intersecting electrodes at the first area, and electrically connected with the first driver; a plurality of second intersecting electrodes at the second area, and electrically connected with the first driver and the second driver; and a plurality of third intersecting electrodes at the third area, and electrically connected with the second driver. Each of the first pad area and the second pad area is spaced from the second area in a first direction.