Control system of touch module

Abstract

The invention discloses a control system of a touch module, which is electrically coupled between the touch module and a host system, and used for transmitting a comprehensive touch signal to the host system by receiving a plurality of first touch induction signals emitted by the touch module. The control system comprises a line selection module, a control processing module and an analog-digital converter, wherein the line selection module is used for receiving a plurality of first touch induction signals from the touch module by a plurality of electrical transmission paths, and selecting an analog touch signal from the first touch induction signals according to line selection signals sent by the control processing module, then transmitting the analog touch signal to the analog-digital converter; the analog-digital converter is used for accepting the control of the control processing module, receiving the analog touch signal, and converting the analog touch signal into a digital touch signal; and the control processing module is used for receiving the digital touch signal, and sending a comprehensive touch signal to the host system according to the digital touch signal.

Description

technical field [0001] The invention relates to a control system, in particular to a control system of a touch module. Background technique [0002] With the advancement of technology, electronic devices with touch panels such as personal digital assistants (PDAs), mobile phones, and tablet notebook computers are becoming more and more popular. Touch panels on the market can be divided into several categories according to their design principles. , and the most representative touch panels are resistive touch panels and capacitive touch panels. [0003] Resistive touch panels use fingers or any object to press the surface of the panel, so that the conductive layer inside the panel generates a voltage, and then detect the pressed position on the panel surface; the other is capacitive touch panel, which uses fingers or any The conductive object touches the surface of the panel, and generates capacitive coupling with the electric field formed by the conductive layer of the pane...

AI Technical Summary

Problems solved by technology

[0015] The digital output terminal of the analog-digital converter often has more than one output pin. In other words, when the multi-point input touch panel has N sensing wires, the control system of the prior art must prepare N analog-digital pins. Converters, and the N analog-to-digital converters have output pins that are multiples of N, and the control processing module must also have pins that are multiples of N to electrically connect all the analog-to-digital converters

[0016] To sum up, since the existing control system uses an analog-to-digital converter to directly receive the analog sensing signal generated by the touch module, when it is applied to a multi-point input touch panel, multiple analog signals must be prepared. -The digital converter is electrically connected to each induction wire, which leads to a large increase in the number of pins and the area of ​​the entire control system, which in turn makes it difficult to miniaturize the device

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