Touch Panel Controller Dynamic Region Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch panel systems face challenges in reducing power consumption and enhancing detection sensitivity, particularly when the size of the detecting surface is increased, leading to increased noise and deteriorated sensitivity due to the need to detect multiple electrodes simultaneously.
Innovation Solution
A touch panel controller that includes a driving portion for generating status signals, a position calculating portion for processing these signals to determine the indicator's position, and a region setting portion that updates effective detection regions based on the indicator's position, allowing for selective driving and processing of only necessary areas, thereby reducing power consumption and noise while improving sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all electrodes are operated simultaneously to detect indicator without omission on a large detecting surface, then detection completeness is improved, but power consumption is increased and detection sensitivity is deteriorated due to noise
Solution Approach 1:
The detecting surface is divided into multiple detecting regions corresponding to different electrodes. Instead of operating all electrodes simultaneously, the controller selectively operates only the electrodes whose detecting regions contain the indicator, segmenting the detection process into targeted regions.
Solution Approach 2:
The system applies different detection strategies to different regions of the detecting surface. By identifying which detecting regions contain the indicator, the system concentrates detection resources locally where needed, rather than uniformly across the entire large detecting surface.
2Reliability
If all electrodes are operated simultaneously to detect indicator without omission on a large detecting surface, then detection completeness is improved, but detection sensitivity is deteriorated due to noise occurrence
Solution Approach 1:
The system extracts and isolates the signal from the specific electrode detecting region where the indicator is present, separating it from the noise generated by other electrodes. This extraction of the relevant signal from the total system noise improves detection sensitivity.
Solution Approach 2:
The system converts the potential harm of having many electrodes (which generate noise) into a benefit by using the indicator's position information to selectively activate only the necessary electrodes, thereby reducing overall noise while maintaining complete detection coverage.
3Use of energy by moving object
If electrodes are detected one by one in order as proposed in Patent Document 1, then power consumption is reduced, but detection time is increased resulting in deteriorated detection sensitivity
Solution Approach 1:
The system performs preliminary action by first determining the position of the indicator before conducting detailed electrode detection. This preliminary position information is then used to pre-select which electrodes need to be detected, eliminating the need for sequential detection of all electrodes and reducing both time and power consumption.
Solution Approach 2:
The detection process is made dynamic and adaptive rather than static and fixed. Instead of following a predetermined sequential detection order, the system dynamically adjusts which electrodes to detect based on the real-time position of the indicator, optimizing detection efficiency.
4Reliability
If transmitting conductors and receiving conductors are switched every predetermined time to select all of them as proposed in Patent Document 2, then complete detection coverage is achieved, but detection time is increased resulting in deteriorated detection sensitivity
Solution Approach 1:
The system performs preliminary determination of the indicator's position on the detecting surface before conducting the actual electrode detection. This preliminary information allows the system to pre-select only the transmitting and receiving conductors needed for detecting the specific region where the indicator is located, rather than switching through all conductors.
Solution Approach 2:
The detection system applies local quality by concentrating detection resources on the specific transmitting and receiving conductors that correspond to the region containing the indicator. Instead of uniformly switching through all conductors across the entire detecting surface, the system locally targets the relevant conductors based on indicator position.
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 approach effectively reduces power consumption and enhances detection sensitivity by restricting the effective detection region to where the indicator is present, preventing unnecessary detection and processing, and improving the precision of indicator positioning.
Implementation Method 1
a capacitive touch panel system having a plurality of transmitting conductors arranged in a horizontal direction of a detecting surface and a plurality of receiving conductors arranged in a vertical direction of the detecting surface
Data Source
AI summary
A touch panel system in which power consumption is reduced and detection sensitivity is enhanced, a controller for the touch panel system, and a method of operating the system. Touch panel system includes status detecting portion having status signal generating portions generating a status signal indicative of a close status of an indicator, a position calculating portion processing the status signal, thereby calculating a position of the indicator on a detecting surface, and a region setting portion for updating an effective region set in the detecting surface P based on the position of the indicator which is calculated by the position calculating portion. A first operation causes the status signal generating portions SL and DL to selectively generate a status signal and a second operation causes the position calculating portion to selectively process the status signals generated by the status signal generating portions SL and DL.