Mutual Capacitance Touch Sensing Device Sine Wave Generation
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Solution Overview
Problem
Existing mutual capacitance touch sensing devices have complex loop operations that reduce operational efficiency due to the need for separate components for driving, measuring, and determining touch states.
Innovation Solution
A mutual capacitance touch sensing device with a sine wave generator using a lookup table to generate sine waves and a measurement unit to scan sensing signals, simplifying the loop operation by using integer arithmetic and reducing the complexity of signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate component parts are used for transmitting driving signals, measuring sensing signals, and determining touch states, then the touch sensing device can perform all required functions, but the loop operation becomes complex and operational efficiency is reduced
Solution Approach 1:
The patent combines the driving signal transmission, sensing signal measurement, and touch state determination functions into an integrated system. The sine wave generator produces driving signals that are transmitted through selective circuits to driving lines, while the same system measures sensing signals from sensing lines and determines touch states through integrated processing, eliminating the need for separate component parts and simplifying the loop operation.
Solution Approach 2:
The touch sensing device is designed with multi-functional components that can perform multiple operations. The sine wave generator and measurement system serve universal purposes by handling both driving signal generation and sensing signal measurement, as well as touch state determination, allowing a single system to fulfill all required functions without requiring separate dedicated components for each function.
2Adaptability or versatility
If separate component parts are used for driving, measuring, and determining touch states, then all touch sensing operations can be performed, but operational efficiency is lowered
Solution Approach 1:
The patent merges the driving, measuring, and determining operations into a unified loop structure. The sine wave generator generates driving signals that are transmitted through selective circuits, and the same system measures sensing signals and determines touch states in an integrated manner, reducing the number of separate operational loops and improving overall operational efficiency.
Solution Approach 2:
The integrated system enables continuous operation without the need for separate discrete steps for driving, measuring, and determining. The unified loop structure allows the system to continuously generate driving signals, measure sensing signals, and determine touch states in a seamless manner, eliminating idle time and improving productivity.
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 simplifies the loop operation and increases the operational efficiency of the touch sensing device, allowing for lower-cost processors and improved signal processing efficiency.
Implementation Method 1
a sine wave generator electrically connected with the selective circuit and adapted for generating sine waves according to a lookup table being built therein
Implementation Method 2
the driving signal at each driving line is coupled to the respective sensing line through the respective crossover point. Thus, the sensor module scans the sensing signal at each crossover point
Data Source
AI summary
A mutual capacitance touch sensing device and a sine wave measuring method is disclosed. A sine wave generator of a driver and sensor module of a touch sensing panel of the mutual capacitance touch sensing device uses a clock to generate multiple sine waves according to a lookup table being loaded therein, enabling a selective circuit to transmit the sine waves to driving lines of the touch sensing panel in a proper order so that each sine wave at each driving line is capacitive-coupled to a respective sensing line through a respective crossover point to produce a respective sensing signal, and then a measurement unit scans the generated sensing signal subject to the lookup table in the sine wave generator and then provides the measured signals to a processor for processing.