Pressure detection method and device thereof, and electronic terminal

Abstract

Embodiments of the present application provide a pressure detection method and its device as well as an electronic terminal. The pressure detection method includes: obtaining the output electrical signal of the voltage dividing capacitance formed between the driving electrode and the pressure sensing electrode, and the pressure sensing electrode and the reference electrode The output electrical signal of the pressure detection capacitor formed between the pressure sensing electrode and the reference electrode has a gap that can change with the pressure; according to the output electrical signal of the voltage dividing capacitor and the pressure detection The output electric signal of the capacitor determines the pressure characteristic data when the pressure sensing electrode is pressed. The embodiment of the present application simplifies the pressure detection model, increases the voltage variation, weakens or eliminates the impact of environmental changes on the pressure performance, and realizes environmental self-calibration and initial gap (GAP) self-calibration between the pressure sensing electrode and the reference electrode .

Description

technical field [0001] The embodiments of the present application relate to the technical field of pressure detection, and in particular, to a pressure detection method and device thereof, and an electronic terminal. Background technique [0002] If the touch technology is applied to a smart terminal, the user can realize the operation of the terminal as long as the gesture is operated, getting rid of the traditional mechanical keyboard and making the human-computer interaction more straightforward. [0003] In most current electronic products, the user's finger touching the display will only generate two-dimensional coordinate input. However, with the development of touch technology, such as capacitive touch as an example, simple finger touch can no longer satisfy users. More Dimensional input requirements, adding force touch technology (Force Touch) to the capacitive touch screen can add an input dimension, so that the touch screen can sense finger pressure information, an...

AI Technical Summary

Problems solved by technology

However, if based on the existing pressure detection model, due to the existence of load capacitance, the pressure detection model is more complicated on the one hand, and on the other hand, the total capacitance is increased, which reduces the variation of the detection voltage; in addition, the impact of environmental changes on the load capacitance will be It is equivalent to the pressure detection capacitor, but in the pressure detection model of the prior art, the default load capacitance is constant, which leads to the aggravation of the impact of environmental changes on the pressure performance; finally, the existence of the load capacitance makes the pressure detection in the prior art The model is difficult to achieve environmental self-calibration and self-calibration of the initial gap (GAP) between the pressure-sensing electrode and the reference electrode due to the external capacitor

Images