Touch detection circuit and dimming module

Abstract

The invention discloses a touch detection circuit and a dimming module. The touch detection circuit comprises a signal generator, a detection capacitance module, a full-wave rectification module, a low-pass filtering module, an ADC sampling module and an MCU processing module which are connected in series. The signal generator provides sine wave signals; the capacitance detection module is used for receiving the sine wave signal, reading a to-be-detected touch signal and carrying out capacitance detection processing to obtain a first electric signal; the full-wave rectification module receives the first electric signal and performs full-wave rectification processing to obtain a second electric signal; the low-pass filtering module is used for receiving the second electric signal and filtering the second electric signal to obtain a third electric signal; the ADC sampling module receives the third electric signal and converts the third electric signal into a digital signal; the MCU processing module is used for receiving the digital signal and judging whether the to-be-detected touch signal is a touch signal or not according to the change of the digital signal or not, so that whether a touch condition occurs or not can be effectively judged.

Description

technical field [0001] The present invention relates to the technical field of touch control, and more particularly, to a touch detection circuit and a dimming module. Background technique [0002] At present, dimming glass is used in construction, transportation and other fields. Dimming glass can change the light transmittance of the window, so as to achieve the change between the dark state and the bright state of the window. However, in related technologies, only peripheral devices can be used. It is very inconvenient to use a device to change the light transmission mode of the dimming glass. The technology for integrating touch buttons inside is not mature. [0003] Then, how to integrate the touch unit in the dimming glass to improve the practicability of the dimming glass product is a technical problem to be solved urgently by those skilled in the art. SUMMARY OF THE INVENTION [0004] In view of this, the embodiments of the present invention provide a touch detec...

AI Technical Summary

Problems solved by technology

[0002] At present, dimming glass is used in construction, transportation and other fields. Dimming glass can change the light transmittance of the window, so as to achieve the change between the dark state and the bright state of the window. However, in related technologies, only through the peripheral It is very inconvenient to change the light transmission mode of the dimming glass with a device, etc.

The technology for internal integrated touch buttons is not mature

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