Sensor Layer Electrode Routing for Uniform Sensitivity on Shaped Displays
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Solution Overview
Problem
Electronic devices with active areas of varying shapes face challenges in maintaining consistent sensing sensitivity due to differences in electrode lengths and configurations, which can affect the performance and efficiency of touch screens, particularly in display devices and sensor layers.
Innovation Solution
The electronic device incorporates a sensor layer with a specific arrangement of electrodes and cross-electrodes of varying lengths and connections, including first and second electrodes and cross-electrodes, along with distinct line and cross-line configurations, to enhance sensing sensitivity by controlling the positions of connection points and reducing sensitivity variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrodes are arranged with different lengths to cover various shapes, then the adaptability of the sensor layer is improved, but the sensing sensitivity uniformity deteriorates
Solution Approach 1:
The patent applies local quality by configuring different numbers of connection lines for first and second electrodes based on their respective positions and lengths. Specifically, first electrodes are connected via first lines while second electrodes are connected via second lines, with the numbers of these lines being different to compensate for the varying lengths and positions of the electrodes, thereby maintaining uniform sensing sensitivity across different shaped active areas.
2Reliability
If the number of connection lines is increased to improve signal transmission, then the electrical conductivity is improved, but the device complexity increases
Solution Approach 1:
The patent segments the connection lines into two distinct types: first lines connecting first electrodes and second lines connecting second electrodes. This segmentation allows for optimized signal transmission for each electrode type while maintaining manageable complexity through systematic organization of the connection structure.
Data Source
AI summary
An electronic device including: a display layer; and a sensor layer that includes: first electrodes in a sensing area and having different lengths; second electrodes in the sensing area; first cross electrodes in the sensing area; second cross electrodes in the sensing area and having different lengths; pads in a peripheral area; first lines extended from the first electrodes at a first side of the sensing area towards the pads; second lines extended from the second electrodes at a second side of the sensing area towards the pads; first cross lines extending from the first cross electrodes towards the pads; and second cross lines extending from the second cross electrodes towards the pads, the first lines being different from the second lines in number, and the first cross lines being different from the second cross lines in number.