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Touch key circuit

A key and circuit technology, applied in the field of mobile communication equipment, can solve problems such as high cost and complex circuit structure, and achieve the effects of reducing quantity and cost, simplifying circuit structure, and reducing complexity

Active Publication Date: 2014-06-18
SUZHOU SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there are many keys to be supported, the structure of the circuit will be very complicated and the cost will be high

Method used

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] The invention discloses a touch button circuit, the structure of which is as follows: figure 2 As shown, it includes: connecting terminal 21, multi-channel touch key control chip 22, multi-channel key circuit 23, wherein, the number of channels of the multi-channel touch key control chip 22 is greater than or equal to the number of the touch key circuit, by figure 2 It can be seen that the touch button circuit in this embodiment includes 6-way button ...

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Abstract

Disclosed in the invention is a touch key circuit, comprising wiring terminals, a multi-channel touch key control chip and multipath key circuits. Each of the key circuits respectively comprises: a key, which is connected with an input end of the multi-channel touch key control chip; a triode, whose base electrode is connected with an output end corresponding to the input end; and a diode. Specifically, an input end of the diode is connected with an emitter of the triode and an output end of the diode is connected with a key port of one of the wiring terminals. The output end of the multi-channel touch key control chip is connected with a power source by pull-up resistor and a collector of the triode is grounded. According to the disclosed touch key circuit, the multi-channel touch key control chip is employed and detection on a key state by a main program control chip through the wiring terminals is realized by connection and disconnection of the triodes and diodes, thereby further realizing an objective of control on multiple keys, simplifying the circuit structure, reducing the number and cost of devices. Moreover, when it is needed to support the multiple keys, extension can be carried out conveniently, so that extensibility is improved and complexity of the extension is reduced.

Description

technical field [0001] The invention relates to the field of mobile communication equipment, in particular to a touch button circuit. Background technique [0002] The existing touch key circuit structure such as figure 1 As shown, it includes: connecting terminals 11 connected to the control chip of the main board, and the connecting terminals include seven ports; voltage dividing resistors 12, the voltage dividing resistors are divided into three groups, and each group includes two resistors connected in parallel; touch keys control chip 13, figure 1 There are six touch key control chips, a filter capacitor 14 and a diode 15 connected to each touch key control chip. [0003] It can be seen from the figure that the existing touch key circuit adopts a touch IC (integrated circuit, integrated circuit board) single-channel output mode, that is, one touch key control chip corresponds to one channel output. When there are many keys to be supported, the structure of the circui...

Claims

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Application Information

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IPC IPC(8): H03K17/96
Inventor 李万永钟跳舟徐锡胜
Owner SUZHOU SAMSUNG ELECTRONICS CO LTD
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