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Touch key anti-interference method and circuit

A button and circuit technology, which is applied in the field of touch button anti-interference method and circuit, can solve the problems that touch buttons are easy to be interfered, achieve the effect of improving the anti-interference level, reducing the failure rate, and preventing misoperation of buttons

Inactive Publication Date: 2020-04-07
GREE ELECTRIC APPLIANCES INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defect that the existing touch keys are easily interfered, the present invention proposes an anti-interference method and circuit for touch keys

Method used

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  • Touch key anti-interference method and circuit

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Embodiment Construction

[0027] Such as figure 1 As shown, the present invention also proposes a touch key anti-interference circuit, including: a touch chip, at least one touch key and a working circuit corresponding to the touch key, the touch key is connected to the input pin of the touch chip, and the working circuit is connected to the working circuit On the output pin of the chip, the touch chip implements the anti-jamming method of the touch button, and the touch chip adopts a touch chip of the model CBM7312.

[0028] A resistor is connected in series between each touch button and the corresponding input pin of the touch chip, and the change in the resistance value of the resistor can adjust the magnitude of the input value collected when the touch button is pressed. A filter circuit is connected between the power supply pin and the ground pin of the touch chip. The filter circuit includes bypass capacitors, filter capacitors and magnetic beads. The power supply pin of the touch chip is connect...

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Abstract

The invention discloses a touch key anti-interference method and circuit, and the method comprises the following steps: collecting an input value of a touch key, processing the input value to obtain an effective value, judging whether the effective value meets a preset condition or not, and transmitting a triggering signal to a working circuit corresponding to the touch key if the effective valuemeets the preset condition. The anti-interference level of touch keys can be effectively improved, the problems of key misoperation, insensitive operation and the like of a user in the using process are prevented, and the fault rate of a touch display panel is reduced.

Description

technical field [0001] The invention relates to the technical field of touch keys, in particular to a touch key anti-interference method and circuit. Background technique [0002] The operation of the display panel of the electric refrigerator is usually realized by touch chip and spring button. The widely used touch chip in the industry is the TS08NE chip of ADS company. The TS08NE chip supports a maximum of 8 key input. Use two chips to achieve. The design of the refrigerator display board is limited by the size of the structure. The use of too many spring buttons will bring difficulties to the PCB layout and wiring. The complicated wiring will also cause the interference of button acquisition, which will easily lead to false triggering and sensitivity during the injection current test. Drops, dead screens, etc. The newly used touch pad technology made of flexible circuit boards in the industry separates the buttons from the PCB board, which solves the interference effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/96H03K17/16
CPCH03K17/16H03K17/96
Inventor 唐华俊方茂长汪猗吉
Owner GREE ELECTRIC APPLIANCES INC