Touch Sensitive Processing Apparatus Segmented Electrode Sensing
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Solution Overview
Problem
As the area of touch-sensitive screens increases and the number of electrodes grows, the time required for mutual-capacitance touch sensing becomes longer, leading to a lower reporting rate of touch sensing information and increased response time for electronic systems, negatively impacting user experience.
Innovation Solution
A touch-sensitive processing method that utilizes a touch-sensitive panel with parallel first and second electrodes, a driving circuit, and a processing module to generate simultaneous sensing information from both sets of electrodes, transmit driving signals, and calculate object positions, thereby speeding up sensing rates and reducing response times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the area of touch sensitive screen increases and quantities of electrodes grow, then the coverage and detection capability improve, but the time duration for performing mutual-capacitance touch sensing becomes longer
Solution Approach 1:
The patent segments the sensing process into two independent phases: first collecting sensing information from all first electrodes simultaneously to identify touch line pieces, then using this information to guide targeted sensing along second electrodes. This segmentation avoids the need for complete mutual-capacitance scanning of all electrode intersections, thereby reducing sensing time while maintaining detection accuracy on large screens with numerous electrodes.
Solution Approach 2:
The patent performs preliminary sensing along first electrodes to identify touch line pieces before conducting sensing along second electrodes. This preliminary action filters out non-touch areas, allowing the system to focus subsequent sensing efforts only on regions where external objects are likely present, thus reducing the overall sensing time duration.
2Measurement precision
If the quantities of electrodes of the touch sensitive screen grows, then the sensing precision and coverage improve, but the reporting rate of touch sensing information becomes lower
Solution Approach 1:
The patent divides the electrode array into two sets (first electrodes parallel to first axis, second electrodes parallel to second axis) and processes them in separate sequential steps. By segmenting the data collection and processing workflow, the system can maintain high sensing precision through comprehensive electrode utilization while improving reporting rate by avoiding redundant mutual-capacitance calculations across all electrode intersections.
Solution Approach 2:
The patent performs sensing along first electrodes for all intersections, then uses this partial information to guide selective sensing along second electrodes only where needed. This partial action approach ensures sufficient sensing precision for identifying touch locations while reducing the total number of sensing operations required, thereby increasing the reporting rate.
3Reliability
If the time duration for performing mutual-capacitance touch sensing becomes longer, then the sensing completeness improves, but the response time of the electronic system to user(s) increases
Solution Approach 1:
The patent performs preliminary sensing along first electrodes to identify touch line pieces before conducting the second phase of sensing along second electrodes. This preliminary action ensures that the system captures essential touch information early, maintaining sensing completeness while enabling faster overall response by avoiding unnecessary extended sensing in non-touch areas.
Solution Approach 2:
The patent performs sensing operations selectively rather than completing full mutual-capacitance scanning of all electrode intersections. By performing partial sensing along first electrodes followed by targeted sensing along second electrodes based on identified touch line pieces, the system maintains adequate sensing completeness while significantly reducing the time duration and improving response time.
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 method accelerates capacitance touch sensing, increases reporting frequency of touch sensing information, and reduces the electronic system's response time to user inputs, enhancing user experience by improving processing efficiency and reducing electromagnetic interference.
Implementation Method 1
capacitance touch sensing
Implementation Method 2
mutual-capacitance touch sensing
Data Source
AI summary
A touch sensitive processing method comprising: generating sensing information sensed by first electrodes and second electrodes simultaneously as a first and a second set, respectively; according to one or more first touch line pieces corresponding to one or more external objects in the first set, transmitting driving signals via one or more of the first electrodes corresponding to one or more first touch line pieces, and sensing the driving signals via the multiple second electrodes to form one-dimensional sensing information; reserving a part of the one-dimensional sensing information which corresponds to at least one second touch line piece of one or more external objects in the second set to be at least one line piece; composing at least one line piece group according to the line piece; calculating one position of the external object according to the line piece group.