Piezoelectric-type three-dimensional touch input module and driving method thereof

Abstract

The invention relates to a piezoelectric-type three-dimensional touch input module and a driving method thereof. The touch input module comprises a piezoelectric sensor, a projective-capacitance sensor, a control chip of the projective-capacitance sensor, an AD conversion module and a micro-controller. The micro-controller comprises a computation module and a judgment module. The projective-capacitance sensor is connected with the control chip of the projective-capacitance sensor. By sending operated two-dimensional coordinates (X, Y) to the micro-controller, the piezoelectric sensor is connected with the AD conversion module so that a pressure signal in (Z) direction is converted to a digital signal and sent to the micro-controller. The micro-controller is used for judging an operation position through computation based on received (X, Y, Z) data, for judging pressure according to size of Z in order to avoid mis-operation and also used for transmitting a computation result to a system end. The piezoelectric-type three-dimensional touch input module and the driving method thereof have the following beneficial effects: the piezoelectric-type three-dimensional touch input module is simple and compact in structure; while detection precision is ensured, three-dimensional multi-point operation is realized; and the piezoelectric-type three-dimensional touch input module is safe and reliable and has good experience in man-machine interactions.

Description

technical field [0001] The invention belongs to the technical field of terminals, and in particular relates to a piezoelectric three-dimensional touch input module and a driving method thereof. Background technique [0002] Traditional touch technologies include one-dimensional force pressing and two-dimensional projected capacitive technology. Projected capacitive touch technology works by utilizing the current sensing of the human body. When the user touches the capacitive screen, due to the electric field of the human body, this current flows out from the electrodes on the four corners of the screen respectively. Theoretically, the current flowing through the four electrodes is proportional to the distance from the finger to the four corners, and the controller obtains the position through precise calculation of the four current ratios. However, in some scenarios, when the capacitive touch screen is unconsciously touched by the human body, it can also trigger misoperati...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a piezoelectric three-dimensional touch input module that solves the problems of slow judgment time, non-standard judgment and inaccurate judgment in the prior art

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