Sensor Panel Electrode Segmentation for Accurate Low-Power Position Detection
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Solution Overview
Problem
Existing position detecting devices face challenges in maintaining accuracy and reducing power consumption as they increase in size or decrease in thickness, leading to increased capacitance and potential power consumption issues.
Innovation Solution
The position detecting device employs a sensor panel with intersecting transmitting and receiving electrodes, utilizing multiple sensor controllers to process signals from different electrode regions, enhancing detection accuracy and reducing power consumption through optimized signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the position detecting device is increased in size or reduced in thickness, then the device can accommodate larger displays and thinner form factors, but capacitance accompanying the linear electrodes is increased leading to decreased detection accuracy
Solution Approach 1:
The patent divides the sensor panel into multiple regions, each with its own sensor controller that independently processes signals from local transmitting and receiving electrodes. This segmentation allows each controller to manage capacitance effects locally, preventing the accumulation of capacitance across the entire large device while maintaining detection accuracy in each region.
Solution Approach 2:
The patent introduces a multi-dimensional control architecture where multiple sensor controllers operate at different spatial locations (dimensions) across the sensor panel. Each controller manages electrode pairs in its local region, transforming the single-point capacitance problem into a distributed multi-point solution that scales with device size while preserving accuracy.
2Area of stationary object
If the position detecting device is increased in size, then the device can cover larger display areas, but power consumption is increased
Solution Approach 1:
The patent segments the sensor panel into multiple regions with dedicated sensor controllers, each processing signals only for its local electrode pairs. This segmentation enables selective activation and processing of electrode regions based on actual usage patterns, reducing overall power consumption compared to a single controller managing the entire large sensor panel.
Solution Approach 2:
The patent implements partial processing by having each sensor controller handle only the electrode pairs in its specific region rather than processing all electrodes across the entire panel. This partial action approach reduces computational load and power consumption while maintaining comprehensive coverage through the distributed controller architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables high-accuracy position detection with low power consumption, suitable for flexible and thin form factors.
Implementation Method 1
capacitances accompanying the linear electrodes are increased
Data Source
AI summary
A position detecting device includes a sensor panel having a first receiving electrode, a first transmitting electrode disposed so as to perpendicularly intersect the first receiving electrode, a second transmitting electrode disposed so as to extend in a direction parallel with the first transmitting electrode, and a second receiving electrode disposed so as to perpendicularly intersect the second transmitting electrode, a first sensor controller configured to detect a position on the sensor panel on a basis of signals detected by the first transmitting electrode and the first receiving electrode, generate electrode information related to the detection, and transmit the electrode information, and a second sensor controller configured to, on a basis of the electrode information, make a setting for processing of detecting a position on the sensor panel on a basis of signals detected from the second transmitting electrode and the second receiving electrode.