CN103645822A - Foreign matter detection method for touch screen and touch screen - Google Patents

Foreign matter detection method for touch screen and touch screen Download PDF

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Publication number
CN103645822A
CN103645822A CN201310724547.1A CN201310724547A CN103645822A CN 103645822 A CN103645822 A CN 103645822A CN 201310724547 A CN201310724547 A CN 201310724547A CN 103645822 A CN103645822 A CN 103645822A
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CN
China
Prior art keywords
coordinate
foreign matter
touch
screen
effective
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CN201310724547.1A
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Chinese (zh)
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CN103645822B (en
Inventor
付萌
陈磊
钱捷
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上海华勤通讯技术有限公司
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Publication of CN103645822A publication Critical patent/CN103645822A/en
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Abstract

The invention discloses a foreign matter detection method for a touch screen and the touch screen. The foreign matter detection method for the touch screen comprises the steps as follows: currents flowing out of an electrode of the touch screen are detected and converted into coordinate values on the touch screen; whether the coordinate values are within an effective range of the touch screen or not is judged, and the coordinate values within the effective range of the touch screen are used as effective coordinate values; pressures in positions of the effective coordinate values of the touch screen are detected; whether the pressures measured in the last step are smaller than a preset threshold value or not is judged, and the effective coordinate values with the pressures smaller than the threshold value are used as foreign matter coordinate values; and warning signals are output and used for indicating that foreign matters exist in positions of the foreign matter coordinate values. According to the foreign matter detection method for the touch screen and the touch screen, whether the foreign matters exist on the touch screen can be detected, when the foreign matters exist, positions of the foreign matters can be detected, and a user can be informed, so that timely cleaning can be performed.

Description

The foreign matter detecting method of touch-screen and touch-screen

Technical field

The present invention relates to a kind of foreign matter detecting method, relate in particular to a kind of foreign matter detecting method and touch-screen of touch-screen.

Background technology

People are in use during with the electronic equipment of touch-screen, the easy residual foreign matter with static charge on touch-screen, as grease etc., this foreign matter will affect the input signal of touch-screen reception contact etc. after accumulation for a long time, lost efficacy in the subregion of touch-screen, thereby affect user, experience.Yet some foreign matter naked eyes are difficult to identification, therefore need to it be detected and be cleared up.

Summary of the invention

The technical problem to be solved in the present invention is to overcome the foreign matter having on touch-screen in prior art be difficult to distinguish and affect the defect that user experiences, and a kind of foreign matter detecting method and touch-screen of touch-screen is provided.

The present invention solves above-mentioned technical matters by following technical proposals:

A foreign matter detecting method for touch-screen, its feature is, comprises the following steps:

S 1, detect the electric current that the electrode of touch-screen flows out, and be the coordinate figure on touch-screen by current conversion;

S 2, judge that coordinate figure is whether in the effective range of this touch-screen, and using the coordinate figure in the effective range of this touch-screen as effective coordinate figure;

S 3, detect the pressure at effective coordinate figure place of this touch-screen;

S 4, judgement S 3whether the pressure recording is less than a default threshold value, and effective coordinate figure that pressure is less than to this threshold value is as foreign matter coordinate figure;

S 5, output alarm signal, this alerting signal is used for being illustrated in foreign matter coordinate figure place and has foreign matter.

According to the medium of the principle of work of touch-screen and transmission information, touch-screen is divided into four kinds, they are respectively resistance-type, condenser type, infrared-type and surface acoustic wave type, on mobile terminal, mostly use capacitive touch screen.For capacitive touch screen, the electric current that can flow out by the electrode on four angles of touch-screen calculates the coordinate figure of touch point on touch-screen.

While having foreign matter with static charge as grease on touch-screen, foreign matter generally can occupy certain band of position, therefore when obtaining the coordinate figure of foreign matter, has a plurality of coordinate figures, now needs the coordinate figure of screening in touch-screen effective range as effective coordinate figure.The pressure that the pressure that the foreign matter of discovering because user is more difficult produces touch-screen produces touch-screen much smaller than finger conventionally, therefore can determine when effectively the pressure at coordinate figure place is less than this threshold value that by foreign matter there is foreign matter at effective coordinate figure place.Wherein, pressure and this threshold value that each effective coordinate figure place is obtained compare respectively, using qualified effective coordinate figure as foreign matter coordinate figure.To user, send an alerting signal detecting when there is foreign matter at foreign matter coordinate figure place, inform that the foreign matter coordinate figure place on user's touch-screen exists foreign matter, need be as early as possible to its cleaning.

Preferably, this alerting signal is for to paint markd image at foreign matter coordinate figure place.In order to manifest more intuitively the residual condition of foreign matter on touch-screen, by the corresponding foreign matter coordinate figure place on the image in an image expression touch screen surface, make the mark that has foreign matter, user only need wipe this foreign matter in those mark.

Preferably, step S 4with step S 5between comprise:

S 41, all foreign matter coordinate figures are divided into at least one coordinate figure group, wherein the foreign matter coordinate figure in adjacent, the different coordinate figure group of foreign matter coordinate figure in same coordinate figure group is non-conterminous;

Step S 5for: output one second image, is all painted with one second mark in position corresponding to each coordinate figure group in this second image.Wherein, position corresponding to each coordinate figure group is the integral position that adjacent foreign matter coordinate figure links together.

For the adjoining foreign matter coordinate figure of a class, can be classified as a coordinate figure group, to embody more intuitively the distribution situation of foreign matter on touch-screen, if regard the position on touch-screen as latticed division, for the coordinate figure in touch-screen adjacent mesh, belong to adjacent foreign matter coordinate figure so, adjacent foreign matter coordinate figure can represent that those positions all exist foreign matter by a whole mark, makes user more can know intuitively the distribution situation of different big or small foreign matters on touch-screen.

The present invention also provides a kind of touch-screen, and its feature is, comprises a coordinate figure acquisition module, one first judge module, one second judge module, a pressure detection module and an alarm module,

The electric current that this coordinate figure acquisition module flows out for detection of the electrode of touch-screen be the coordinate figure on touch-screen by current conversion;

This first judge module is used for using the coordinate figure in the effective range of this touch-screen as effective coordinate figure;

This pressure detection module is for detection of the pressure at effective coordinate figure place of this touch-screen;

Effective coordinate figure that this second judge module is used for pressure to be less than a default threshold value is as foreign matter coordinate figure;

This alarm module is for output alarm signal, and this alerting signal is used for being illustrated in foreign matter coordinate figure place and has foreign matter.

Preferably, this alerting signal is for to paint markd image at foreign matter coordinate figure place.

Preferably, this touch-screen also comprises a grouping module, this second judge module for effective coordinate figure that pressure is less than to this threshold value as foreign matter coordinate figure and enable this grouping module, this grouping module is for being divided at least one coordinate figure group by all adjacent foreign matter coordinate figures, then enable this alarm module, wherein the foreign matter coordinate figure in adjacent, the different coordinate figure group of foreign matter coordinate figure in same coordinate figure group is non-conterminous;

This alarm module is used for exporting one second image, in this second image, in position corresponding to each coordinate figure group, is all painted with one second mark.

Positive progressive effect of the present invention is: the foreign matter detecting method of this touch-screen and touch-screen can detect on touch-screen, whether there is foreign matter, when there is foreign matter, can detect the position at foreign matter place, and inform that user clears up timely, thereby lost efficacy and affect user's experience in the subregion of having avoided touch-screen to cause because of the existence of foreign matter.

Accompanying drawing explanation

Fig. 1 is the foreign matter detecting method process flow diagram of the touch-screen of the embodiment of the present invention 1.

Fig. 2 is the foreign matter detecting method process flow diagram of the touch-screen of the embodiment of the present invention 2.

Fig. 3 is the schematic diagram of the touch-screen of the embodiment of the present invention 2.

Embodiment

Mode below by embodiment further illustrates the present invention, but does not therefore limit the present invention among described scope of embodiments.

Embodiment 1

The present embodiment provides a kind of foreign matter detecting method of touch-screen, as shown in Figure 1, comprises the following steps:

Step 100, detect the electric current that the electrode of touch-screen flows out, and be the coordinate figure on touch-screen by current conversion, the quantity of this coordinate figure can because of the size of foreign matter, the distribution situation on touch-screen be different with foreign matter;

Step 101, judge that coordinate figure is whether in the effective range of this touch-screen, and using the coordinate figure in the effective range of this touch-screen as effective coordinate figure;

Step 102, detect the pressure at effective coordinate figure place of this touch-screen;

Whether the pressure that step 103, determining step 102 record is less than a default threshold value, and effective coordinate figure that pressure is less than to this threshold value is as foreign matter coordinate figure, and wherein, judgement is that the pressure for a plurality of effective coordinate figures place carries out;

Step 104, output alarm signal, this alerting signal is used for being illustrated in foreign matter coordinate figure place and has foreign matter.This alerting signal is for to paint markd image at foreign matter coordinate figure place.

The foreign matter detecting method of this touch-screen can detect on touch-screen whether have foreign matter, can detect the position at foreign matter place when there is foreign matter, and informs that user clears up timely.

Embodiment 2

The present embodiment provides a kind of foreign matter detecting method of touch-screen, and as shown in Figure 2, the difference of the present embodiment and embodiment 1 is, between step 103 and step 104, comprises:

Step 1031, all foreign matter coordinate figures are divided into at least one coordinate figure group, wherein the foreign matter coordinate figure in adjacent, the different coordinate figure group of foreign matter coordinate figure in same coordinate figure group is non-conterminous;

Step 104 is: output one second image, in this second image, is all painted with one second mark in position corresponding to each coordinate figure group.

For instance, when a contactant with static charge remains to touch-screen surperficial, the electrode of touch-screen has corresponding outflow of bus current, contactant for difformity size, according to the principle of capacitive touch screen, by this Current calculation, draw a plurality of coordinate figures of this contactant on touch-screen.Suppose there is A, B, C, D, E, six coordinate figures of F, and in those coordinate figures, coordinate figure F, not in the effective range of touch-screen, therefore only detects the pressure at effective coordinate figure A, B, C, D, E place.Wherein, effectively the pressure at coordinate figure E place is greater than this threshold value, illustrates that the pressure that E place produces is more to derive from finger to touch-screen applied pressure, therefore determines that foreign matter coordinate figure A, B, C, D place exist foreign matter.

According to the grid of on touch-screen, coordinate figure being divided, wherein, foreign matter coordinate figure A, B, C are in the grid that belongs to adjacent, therefore foreign matter coordinate figure A, B, C are classified as to the first coordinate figure group, and foreign matter coordinate figure D is classified as to the second coordinate figure group.When output the second image, the second image can image represents the foreign matter distribution situation of touch screen surface, in the second image, in the first coordinate figure group and the second coordinate figure group corresponding position, show respectively one second mark, to represent that those second mark exist a foreign matter.Wherein, the second mark that the first coordinate figure group corresponding position shows shows that foreign matter coordinate figure A, B, C are the foreign matters for a region, particularly, can by foreign matter coordinate figure A, B, C are linked together or in the lump painted demonstration carry out this first coordinate figure group of mark, colored spots that the second coordinate figure group can be independent shows.When reaching embodiment 1 effect, make user more can know intuitively the distribution situation of different big or small foreign matters on touch-screen.

The present embodiment also provides a kind of touch-screen, and as shown in Figure 3, this touch-screen comprises a coordinate figure acquisition module 1, one first judge module 2, a pressure detection module 3, one second judge module 4, a grouping module 5 and an alarm module 6,

The electric current that coordinate figure acquisition module 1 flows out for detection of the electrode of touch-screen be the coordinate figure on touch-screen by current conversion;

The first judge module 2 is for using the coordinate figure in the effective range of this touch-screen as effective coordinate figure;

Pressure detection module 3 is for detection of the pressure at effective coordinate figure place of this touch-screen;

The second judge module 4 for effective coordinate figure of pressure being less than to a default threshold value as foreign matter coordinate figure;

Grouping module 5, for all adjacent foreign matter coordinate figures are divided into at least one coordinate figure group, is then enabled this alarm module.

Alarm module 6, for exporting one second image, in this second image, is all painted with one second mark in position corresponding to each coordinate figure group.

In sum, the foreign matter detecting method of this touch-screen can detect on touch-screen, whether there is foreign matter, when there is foreign matter, can detect the position at foreign matter place, and inform that user clears up timely, thereby lost efficacy and affect user's experience in the subregion of having avoided touch-screen to cause because of the existence of foreign matter.

Although more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited by appended claims.Those skilled in the art is not deviating under the prerequisite of principle of the present invention and essence, can make various changes or modifications to these embodiments, but these changes and modification all fall into protection scope of the present invention.

Claims (6)

1. a foreign matter detecting method for touch-screen, is characterized in that, comprises the following steps:
S 1, detect the electric current that the electrode of touch-screen flows out, and be the coordinate figure on touch-screen by current conversion;
S 2, judge that coordinate figure is whether in the effective range of this touch-screen, and using the coordinate figure in the effective range of this touch-screen as effective coordinate figure;
S 3, detect the pressure at effective coordinate figure place of this touch-screen;
S 4, judgement S 3whether the pressure recording is less than a default threshold value, and effective coordinate figure that pressure is less than to this threshold value is as foreign matter coordinate figure;
S 5, output alarm signal, this alerting signal is used for being illustrated in foreign matter coordinate figure place and has foreign matter.
2. the foreign matter detecting method based on touch-screen as claimed in claim 1, is characterized in that, this alerting signal is for to paint markd image at foreign matter coordinate figure place.
3. the foreign matter detecting method based on touch-screen as claimed in claim 1, is characterized in that step S 4with step S 5between comprise:
S 41, all foreign matter coordinate figures are divided into at least one coordinate figure group, wherein the foreign matter coordinate figure in adjacent, the different coordinate figure group of foreign matter coordinate figure in same coordinate figure group is non-conterminous;
Step S 5for: output one second image, is all painted with one second mark in position corresponding to each coordinate figure group in this second image.
4. a touch-screen, is characterized in that, comprises a coordinate figure acquisition module, one first judge module, one second judge module, a pressure detection module and an alarm module,
The electric current that this coordinate figure acquisition module flows out for detection of the electrode of touch-screen be the coordinate figure on touch-screen by current conversion;
This first judge module is used for using the coordinate figure in the effective range of this touch-screen as effective coordinate figure;
This pressure detection module is for detection of the pressure at effective coordinate figure place of this touch-screen;
Effective coordinate figure that this second judge module is used for pressure to be less than a default threshold value is as foreign matter coordinate figure;
This alarm module is for output alarm signal, and this alerting signal is used for being illustrated in foreign matter coordinate figure place and has foreign matter.
5. touch-screen as claimed in claim 4, is characterized in that, this alerting signal is for to paint markd image at foreign matter coordinate figure place.
6. touch-screen as claimed in claim 4, it is characterized in that, this touch-screen also comprises a grouping module, this second judge module for effective coordinate figure that pressure is less than to this threshold value as foreign matter coordinate figure and enable this grouping module, this grouping module is for being divided at least one coordinate figure group by all adjacent foreign matter coordinate figures, then enable this alarm module, wherein the foreign matter coordinate figure in adjacent, the different coordinate figure group of foreign matter coordinate figure in same coordinate figure group is non-conterminous;
This alarm module is used for exporting one second image, in this second image, in position corresponding to each coordinate figure group, is all painted with one second mark.
CN201310724547.1A 2013-12-24 2013-12-24 The foreign matter detecting method of touch-screen and touch-screen CN103645822B (en)

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CN104199572A (en) * 2014-08-18 2014-12-10 京东方科技集团股份有限公司 Touch positioning method of touch display device and touch display device
CN105739766A (en) * 2016-01-28 2016-07-06 广东欧珀移动通信有限公司 Touch display device, foreign matter detection method based on touch display device, and electronic terminal
CN106095164A (en) * 2016-05-31 2016-11-09 努比亚技术有限公司 A kind of method sensing screen spot and terminal
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CN108984261A (en) * 2018-07-12 2018-12-11 广东小天才科技有限公司 A kind of screen cleaning based reminding method and wearable device

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CN104199572B (en) * 2014-08-18 2017-02-15 京东方科技集团股份有限公司 Touch positioning method of touch display device and touch display device
CN104199572A (en) * 2014-08-18 2014-12-10 京东方科技集团股份有限公司 Touch positioning method of touch display device and touch display device
CN105739766A (en) * 2016-01-28 2016-07-06 广东欧珀移动通信有限公司 Touch display device, foreign matter detection method based on touch display device, and electronic terminal
CN105739766B (en) * 2016-01-28 2018-11-20 广东欧珀移动通信有限公司 A kind of touch control display apparatus and foreign matter detecting method, electric terminal based on it
CN106095164A (en) * 2016-05-31 2016-11-09 努比亚技术有限公司 A kind of method sensing screen spot and terminal
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CN107608545A (en) * 2016-07-12 2018-01-19 中兴通讯股份有限公司 Processing method and processing device, the terminal of touch event
CN106331238A (en) * 2016-09-20 2017-01-11 努比亚技术有限公司 Screen stain prompt method, screen stain prompt device and mobile terminal
CN106502451A (en) * 2016-09-27 2017-03-15 北京集创北方科技股份有限公司 Touch detecting method and device
CN106502451B (en) * 2016-09-27 2019-07-26 北京集创北方科技股份有限公司 Touch detecting method and device
CN108984261A (en) * 2018-07-12 2018-12-11 广东小天才科技有限公司 A kind of screen cleaning based reminding method and wearable device

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Address after: 201203 Shanghai city Pudong New Area Zhangjiang Keyuan Road No. 399 Building No. 1

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