Touch Sensor Panel Electrode Size Switching for Power and Precision
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Solution Overview
Problem
Conventional touch panel systems face challenges in reducing power consumption while maintaining detection precision, as sampling scanning often leads to decreased detection precision.
Innovation Solution
A touch sensor panel configuration where drive lines and sense lines intersect, with electrode sizes switchable between large and small, allowing for the use of sub-drive and sub-sense lines that can be simultaneously used without spacing, to optimize power consumption and detection precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If sampling scanning is used to reduce power consumption, then power consumption is reduced, but detection precision of touched position decreases
Solution Approach 1:
The electrode size is made dynamically switchable between large and small configurations. When a touch is detected, the electrode size can be changed to optimize detection precision. This dynamic adaptability allows the system to maintain high detection precision when needed while consuming less power during normal operation, directly resolving the contradiction between power consumption and detection precision.
Solution Approach 2:
The physical parameter of electrode size is changed between two states (large and small). By switching the electrode size parameter, the system can adjust its detection characteristics. Using small electrode size reduces power consumption while large electrode size improves detection precision, allowing the system to optimize based on operational requirements and resolve the contradiction.
2Measurement precision
If large electrode size is used to maintain detection precision, then detection precision is maintained, but power consumption increases
Solution Approach 1:
Instead of continuously using large electrode size, the system dynamically switches between large and small electrode sizes based on operational needs. The large electrode size is used only when high detection precision is required (e.g., during actual touch detection), while small electrode size is used during normal operation to reduce power consumption, thus resolving the contradiction.
Solution Approach 2:
The system employs periodic switching of electrode size rather than continuous use of large electrode size. By alternating between large and small electrode configurations based on detection cycles or touch events, the system maintains detection precision when needed while minimizing power consumption during non-detection periods.
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
This configuration reduces power consumption while maintaining detection precision by dynamically adjusting electrode sizes based on the size of the pointer, ensuring accurate touch position detection without the limitations of sampling scan methods.
Implementation Method 1
a touch sensor panel 101 as a projection-type position inputting device having an electrostatic capacitance
Data Source
AI summary
In a touch sensor panel 10 for inputting a position by a touch operation to a predetermined region, a plurality of drive lines DL disposed in one direction and a plurality of sense patterns SL disposed in another direction intersect each other and an electrode size of an electrode of a sense pattern (sense electrode pattern) in one direction disposed between adjacent intersections is switched between at least two electrode sizes of large and small. The configuration enables power consumption to be small while maintaining detection precision of a touched position.