CN109669574A

CN109669574A - A kind of anti-misoperation control method of capacitance plate under high humidity environment

Info

Publication number: CN109669574A
Application number: CN201811560174.8A
Authority: CN
Inventors: 郑继清; 郭旭; 田学林; 黄德波
Original assignee: Wuhu Hongjing Electronics Co Ltd
Current assignee: Wuhu Hongjing Electronics Co Ltd
Priority date: 2018-12-20
Filing date: 2018-12-20
Publication date: 2019-04-23

Abstract

A kind of anti-misoperation control method that present invention discloses capacitance plates under high humidity environment, capacitance plate issues pulse signal to processor, processor identify capacitance plate issue pulse signal low wave crest portions as instruction, the processor only identify low wave crest portions 20us to the pulse between 300ms be useful signal.The advantage of the invention is that control method is simple, it is easy to accomplish, enable capacitance plate normal use under high humidity environment, the not applicable environment of more institutes at present and occasions can be suitable for.

Description

A kind of anti-misoperation control method of capacitance plate under high humidity environment

Technical field

The present invention relates to touch screen field more particularly to capacitance touching control screens.

Background technique

With the development of science and technology, the application of capacitance plate is more and more extensive, but under high humidity environment, at malfunction Reason is likely to be breached 95% or more, therefore impacts to using, and mobile phone screen touches failure after having water droplet when such as rainy day.

For in this way it is this should, can only generally dry capacitance plate, could enabling, and can not by software or The improvement of hardware inherently overcomes the problems, such as capacitance plate failure under high humidity environment.

Summary of the invention

The technical problem to be solved by the present invention is to realize that one kind can shield just at high humidity environment holding capacitor (touch-control) The control method often to work.

To achieve the goals above, the technical solution adopted by the present invention are as follows: a kind of capacitance plate is anti-error under high humidity environment Method of controlling operation thereof, capacitance plate issue pulse signal to processor, and processor identifies that capacitance plate issues the low wave crest of pulse signal Part as instruction, the processor only identify low wave crest portions 20us to the pulse between 300ms be useful signal.

The processor identify low wave crest portions 20us to the pulse twice in succession between 300ms be useful signal.

High wave crest portions between two subpulse are in 300ms between 1000ms.

The advantage of the invention is that control method is simple, it is easy to accomplish, enable capacitance plate under high humidity environment just It is often used, the not applicable environment of more institutes at present and occasion can be suitable for.

Detailed description of the invention

The content of width attached drawing every in description of the invention expression is briefly described below:

Fig. 1 is that oscillograph collects the normal waveform diagram for touching capacitance plate；

Fig. 2 is the waveform diagram that oscillograph collects abnormal operation capacitance plate；

Fig. 3 is the waveform diagram of 1 capacitance plate of embodiment；

Fig. 4 is the waveform diagram of 2 capacitance plate of embodiment；

Specific embodiment

As shown in Figure 1, screen without water droplet or when normal ambient humidity, normally clicks capacitance plate, the arteries and veins that capacitance plate issues It is normal to rush signal, voltage is normal, waveform be less than 100ms, and when screen has water droplet or ambient humidity is excessively high, capacitance plate Pulse is abnormal, it is difficult to be received identification, at this time capacitance plate issue low-voltage (compare with it is normal when click generation voltage it is lower), As shown in Fig. 2, its waveform is then to cause to click screen failure or screen is misused greater than 5000ms.

For these reasons, hardware can not be handled at present, can only be solved by improving control method, strategy is as follows:

Strategy 1: as shown in figure 3, when low-voltage width gauge, it is to have that input, which meets and is greater than 20uS and the pulse less than 300ms, Effect；Other pulse inputs are invalid, i.e., conventional click capacitance plate, and capacitance plate identifies user instruction.

Strategy 2: as shown in figure 4, when low-voltage width gauge, it is to have that input, which meets and is greater than 20uS and the pulse less than 300ms, It imitates and continuous 2 inputs is effective；Other pulse inputs are invalid, i.e., conventional double-click capacitance plate, and capacitance plate identifies user instruction.

Claims

1. a kind of anti-misoperation control method of capacitance plate under high humidity environment, capacitance plate issues pulse signal to processor, place It manages device identification capacitance plate and issues the low wave crest portions of pulse signal as instruction, it is characterised in that: the processor only identifies low Wave crest portions are useful signal in 20us to the pulse between 300ms.

2. anti-misoperation control method of the capacitance plate according to claim 1 under high humidity environment, it is characterised in that: described Processor identify low wave crest portions 20us to the pulse twice in succession between 300ms be useful signal.

3. anti-misoperation control method of the capacitance plate according to claim 2 under high humidity environment, it is characterised in that: described High wave crest portions between two subpulses are in 300ms between 1000ms.