ADC Integration Control for Low-Power Hidden Function Keys
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Solution Overview
Problem
Current hidden function key circuits in electronic devices have high power consumption, leading to reduced usage time and battery over-discharge, as reducing sensor scanning frequency compromises response speed.
Innovation Solution
A power consumption control method that adjusts the integration time of the ADC sampling circuit and power-on time of the hidden function key based on the device's current state, ensuring response sensitivity while reducing unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If sensor scanning frequency is reduced to lower power consumption, then power consumption decreases, but response speed of hidden function key deteriorates
Solution Approach 1:
The patent dynamically adjusts the integration time of the ADC sampling circuit based on the current state of the electronic device. During standby state, a longer integration time is used to reduce power consumption by allowing the ADC to sample at lower frequency while maintaining detection capability. When a key press event occurs, the integration time is reduced to enable faster response. This dynamic parameter adjustment resolves the contradiction between power consumption and response speed.
Solution Approach 2:
The patent changes the integration time parameter of the ADC sampling circuit according to different operational states. By adjusting this parameter, the system achieves different trade-offs between power consumption and response speed. In standby mode, increased integration time reduces power consumption while maintaining sufficient response capability. In active mode, decreased integration time ensures fast response speed, thus resolving the technical contradiction through parameter optimization.
2Duration of action of stationary object
If sensor scanning frequency is reduced to extend standby time, then standby time increases, but detection sensitivity of hidden function key deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of integration time based on device state. During standby, the ADC uses a longer integration time which allows for lower sampling frequency, thereby extending standby time while maintaining adequate detection sensitivity through the extended integration period that accumulates signal energy.
3Measurement precision
If integration time of ADC sampling circuit is increased to improve detection accuracy, then detection accuracy improves, but power consumption increases
Solution Approach 1:
The patent dynamically adjusts the integration time parameter based on the operational state. During standby state, a longer integration time is employed to maintain detection accuracy while the reduced sampling frequency compensates for the increased per-sample power cost. This dynamic parameter adjustment resolves the contradiction between detection accuracy and power consumption by optimizing the balance based on real-time operational requirements.
Data Source
AI summary
A power consumption control method for an electronic device, an electronic device, and a storage medium, and the method includes: obtaining a current state of the electronic device; determining a target integration time of an ADC sampling circuit based on the obtained current state; and adjusting an integration time of the ADC sampling circuit to the target integration time, and adjusting a power-on time of a hidden function key based on the adjusted integration time to control actual power consumption of the electronic device, wherein the integration time is positively correlated with the power-on time.