Touch Display Integrator Circuit for Low-Power Signal Amplification
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Solution Overview
Problem
As touch display devices increase in resolution and size, the number of touch electrodes, amplifiers, and integrators also increases, leading to larger touch circuits and higher power consumption, which raises costs and energy usage.
Innovation Solution
An integrator with a non-inverting input terminal, feedback capacitor, and path switching units that connect the feedback capacitor between the amplifier's input and output terminals during rising and falling periods of a pulse waveform, allowing for simultaneous amplification and integration of voltage differences, reducing the need for separate amplifiers and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate amplifiers and integrators are used for each touch electrode, then signal amplification and integration functions are achieved, but the touch circuit size and power consumption increase
Solution Approach 1:
The patent combines the amplifier and integrator into a single integrated circuit unit. The amplifier amplifies the sensing signal from the touch electrode, and the integrator integrates the amplified signal over time, both functions performed within one device rather than separate components. This merging reduces the overall touch circuit size while maintaining the necessary signal processing capabilities.
Solution Approach 2:
The integrated circuit performs multiple functions: it amplifies weak sensing signals, integrates the amplified signals over time, and outputs the processed signals for touch detection. By making the circuit multi-functional, the patent eliminates the need for separate dedicated amplifier and integrator components, thereby reducing touch circuit complexity and power consumption.
2Reliability
If separate amplifiers and integrators are used for each touch electrode, then signal amplification and integration functions are achieved, but power consumption increases
Solution Approach 1:
The patent combines the amplifier and integrator into a single integrated circuit unit. The amplifier amplifies the sensing signal from the touch electrode, and the integrator integrates the amplified signal over time, both functions performed within one device rather than separate components. This merging reduces the overall touch circuit size while maintaining the necessary signal processing capabilities.
Solution Approach 2:
The integrated circuit performs multiple functions: it amplifies weak sensing signals, integrates the amplified signals over time, and outputs the processed signals for touch detection. By making the circuit multi-functional, the patent eliminates the need for separate dedicated amplifier and integrator components, thereby reducing touch circuit complexity and power consumption.
3Measurement precision
If the number of touch electrodes is increased to improve resolution, then sensing accuracy is improved, but the number of amplifiers and integrators increases leading to larger circuit size
Solution Approach 1:
The patent combines the amplifier and integrator into a single integrated circuit unit. The amplifier amplifies the sensing signal from the touch electrode, and the integrator integrates the amplified signal over time, both functions performed within one device rather than separate components. This merging reduces the overall touch circuit size while maintaining the necessary signal processing capabilities.
Solution Approach 2:
The integrated circuit performs multiple functions: it amplifies weak sensing signals, integrates the amplified signals over time, and outputs the processed signals for touch detection. By making the circuit multi-functional, the patent eliminates the need for separate dedicated amplifier and integrator components, thereby reducing touch circuit complexity and power consumption.
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 enables the touch display device to reduce the size of the touch circuit and power consumption while maintaining effective signal amplification and integration, allowing for quicker sensing signal generation.
Implementation Method 1
at least one feedback capacitor; a first path switching unit configured to connect the feedback capacitor between an inverting input terminal and an output terminal of the amplifier during a rising period of the reference signal; and a second path switching unit configured to connect the feedback capacitor between the inverting input terminal and the output terminal of the amplifier during a falling period of the reference signal
Data Source
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AI summary
The disclosure provides an integrator, a touch display device, and a driving method therefor which can perform amplification and intrgration functions together. The integrator comprises an amplifier comprising a non-inverting input terminal to which a reference signal having a pulse waveform is supplied; at least one feedback capacitor; a first path switching unit configured to connect the feedback capacitor between an inverting input terminal and an output terminal of the amplifier during a rising period of the reference signal; and a second path switching unit configured to connect the feedback capacitor between the inverting input terminal and the output terminal of the amplifier during a falling period of the reference signal, wherein, during each of the rising period and the falling period of the reference signal, a voltage difference between the reference signal and a signal applied to the inverting input terminal of the amplifier is amplified and accumulated, and the amplified and accumulated voltage difference is output.