CN104133600B - Liquid identification method of touch panel - Google Patents
Liquid identification method of touch panel Download PDFInfo
- Publication number
- CN104133600B CN104133600B CN201310205765.4A CN201310205765A CN104133600B CN 104133600 B CN104133600 B CN 104133600B CN 201310205765 A CN201310205765 A CN 201310205765A CN 104133600 B CN104133600 B CN 104133600B
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- induction
- contact panel
- sensing
- liquid
- point
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- 239000007788 liquid Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000006698 induction Effects 0.000 claims abstract description 80
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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Abstract
The invention relates to a liquid identification method of a touch panel, which comprises the steps of firstly judging that no touch object exists on the touch panel, then scanning the touch panel in a mutual capacitance scanning mode to obtain a full-point type induction frame, regarding an induction point of which the induction value of the induction point exceeds a liquid induction value as an effective induction point in each full-point type induction frame to calculate the number of the effective induction points, and identifying the existence of the liquid object if the number of the effective induction points exceeds a preset critical value; thus, the liquid mark can be marked to eliminate the interference operation of the liquid on the touch panel.
Description
Technical field
The present invention relates to a kind of object identification method of contact panel, more particularly to a kind of Liquid identification side of contact panel
Method.
Background technology
Because capacitance type touch-control panel is that the presence or absence of touching object is judged with the change of capacitance, therefore easily used ring
Border noise disturbs its capacitance, and noise is mistaken for touch object.
For the thing of noise interference capacitors amount one, the controller of contact panel has set the mark of different noise types
(Flag) when, performing report point program for the controller, noise interference, for being disturbed with the noise caused by liquid, mesh can be excluded
The controller of preceding contact panel is set with liquid mark, once judge there is liquid to be present on contact panel from touching signals,
Will the liquid mark be marked, when the controller performs follow-up report point program, can judge that liquid mark has been labeled, and
Liquid interference is excluded, for example, is originally used for referring to report point program more, that is, be limited to single-point report point program, reduced and judged by accident because noise is disturbed
The phenomenon of many objects.
The content of the invention
The main object of the present invention is the Liquid identification method for proposing a contact panel, and contact panel is judged with effective lifting
Speed and correctness that upper liquid is present.
The technical way that above-mentioned purpose to be reached is used is that the Liquid identification method for making the contact panel is included：
Judge touchless object on contact panel；
At least one full point type sensing picture frame is read, the contact panel is scanned with mutual tolerance scan mode, obtain the full point type sense
Answer picture frame；
Actual induction point quantity is calculated, in each full point type sensing picture frame, by the influence value of induction point more than a liquid sense
The induction point that should be worth is considered as actual induction point, and calculates actual induction point quantity；And
Identification fluid-borne object, is that when judging the actual induction point quantity more than a preset critical, then identification has liquid
Object.
Preferably, after identification fluid-borne object is present, the liquid mark of mark one.
Preferably, further number is preset in setting one to above-mentioned identification fluid-borne object step, and further reads this default
Several full point type sensing picture frames, and judge that the actual induction point quantity of all full point type sensing picture frames exceedes preset critical
Afterwards, just identification fluid-borne object is present.
Preferably, touchless object step on above-mentioned judgement contact panel, includes：
The contact panel is scanned with self-tolerant, to obtain the sensing amount of each bar line of induction of the contact panel；
Judge whether the sensing amount of each line of induction is default more than one from appearance touch sensing amount；If nothing, on current Trackpad
There is not touching object.
Preferably, touchless object step on above-mentioned judgement contact panel, includes：
The contact panel is scanned with mutual capacitance type, to obtain a sensing picture frame；
Judge whether include multiple induction points on the sensing picture frame, its sensing amount is more than a default mutual tolerance touch sensing amount；
If so, then judge whether sensing group's shape that the plurality of induction point is constituted meets touching object sensing group's shape, if
Do not correspond, recognize on the Trackpad without touching object.
Preferably, the arrayed feature that the plurality of induction point of above-mentioned judgement is constituted is not the arrayed feature step for touching object
In, the middle induction point of the arrangement scope that multiple induction points are constituted is found out, if middle induction point is less than the sensing of multiple induction points
Value, then be not the arrayed feature for touching object.
The main full point type sensing picture frame that capacitance change is produced so that easy liquid body is disturbed of the invention described above carries out liquid
The identification whetheing there is, and it is determined that start to read full point type sensing picture frame, and a default liquid influence value after touchless object, if
The influence value of the induction point of full point type sensing picture frame has more than the liquid influence value, and influence value exceedes the sensing of liquid influence value
Point quantity exceeds preset critical, that is, confirm with the presence of fluid-borne object；In this way, the liquid mark can be marked, for
Down-stream excludes the interference of liquid on contact panel.
Brief description of the drawings
Fig. 1 is the control block diagram of contact panel of the present invention.
Fig. 2 is the broad flow diagram of fluid present invention recognition methods.
Fig. 3 is the flow chart of the first preferred embodiment of fluid present invention recognition methods.
Fig. 4 is the sensing spirogram table after an integration self-tolerant and mutual capacitance type scanning contact panel.
Fig. 5 is the flow chart of the second preferred embodiment of fluid present invention recognition methods.
Fig. 6 is the sensing spirogram table after an integration self-tolerant and mutual capacitance type scanning contact panel.
Fig. 7 is the flow chart of the 3rd preferred embodiment of fluid present invention recognition methods.
Symbol description：
10 contact panels 101,102 lines of induction
11 controllers
Group of 20 group 30.
Specific embodiment
Be that the correctness that liquid is present is recognized on one contact panel of lifting, refer to Fig. 1 and Fig. 2, the present invention include with
Lower key step：
Judge touchless object (S10) on contact panel 10；
Read at least one full point type and sense picture frame (S11), the contact panel 10 is scanned with mutual tolerance scan mode, obtain this complete
Point type senses picture frame；
Actual induction point quantity (S12) is calculated, in each full point type sensing picture frame, by the influence value of induction point more than a liquid
The induction point of body influence value is considered as actual induction point, and calculates actual induction point quantity；And
Identification fluid-borne object (S13), when judging the actual induction point quantity more than a preset critical, then recognizes the liquid
There is (S14) in object.
When identification is with the presence of fluid-borne object, then the liquid mark for touching signal is given in the meeting of controller 11 of the contact panel 10
To mark, after making operating system 12 receive this touching signal, current contact panel 10 is known by marked liquid mark
On with the presence of liquid, exclude the interference operation that liquid is present on contact panel 10 with subsequent execution, do not process for example or ignore
The coordinate of the touching signals.
Again please refer to shown in Fig. 3, the present invention realizes the flow chart of the first preferred embodiment of above key step, its
The middle actual practice for realizing touchless object step on above-mentioned judgement contact panel is included：
The contact panel is scanned with self-tolerant, to obtain the sensing amount (S101) of each bar line of induction of the contact panel；
Judge whether the sensing amount of each line of induction is default more than one from appearance touch sensing amount；If nothing, on current Trackpad
There is not touching object (S102).
Please refer to shown in Fig. 1 and 4, being that self-tolerant and mutual capacitance type scan the contact panel 10 that includes liquid respectively,
Each bar row, column sensing quantity is 0 (such as GTG sign) after being scanned from self-tolerant, each bar line of induction 101 of self-tolerant scanning,
The interference of 102 sensing amount not liquid body, one of which self-tolerant scan method is exported simultaneously extremely with driven in phase signal
The row line of induction, while to each bar row, column line of induction 101,102 output drive signals, then each line of induction 101,102 of received in sequence
Sensing amount, until all lines of induction 101,102 obtain sensing amount, you can output one group of induction information.Due to such as water droplet etc.
Liquid is appeared on contact panel, and water droplet position correspondence wherein several adjacent lines of induction, although the then voltage of each bar line of induction
Change can be risen or fallen because of water droplet, but simultaneously all lines of induction are exported with the pumping signal of same phase, you can made
The current potential obtained between the adjacent line of induction is same or like so that the sensing of each bar line of induction of received in sequence correspondence water droplet position
Amount, will not include the change of water droplet sensing amount in the sensing amount；Therefore, single ended input is believed with the sensing that scanning phase mode is exported
Breath can effectively exclude the interference of the liquid such as water droplet；Conversely, full point type senses picture frame (if not with ash as obtained by mutual capacitance type is scanned
Rank indicates), the induction point of correspondence liquid position is non-zero positive sensing amount occur；Therefore the present embodiment scans this with self-tolerant touching
Control panel 10, can determine whether to whether there is touch object on the contact panel 10, however, it is determined that touchless object just performs remaining step of Fig. 1
Suddenly (S11~S14).
It is the flow chart of the second preferred embodiment of the invention additionally, referring to again shown in Fig. 5, is to disclose to realize above-mentioned sentencing
Another actual practice of touchless object step on disconnected contact panel 10, it is included：
The contact panel 10 is scanned with mutual capacitance type, to obtain a sensing picture frame (S103)；
Judge whether to have sensing amount on the sensing picture frame more than the induction point (S104) of a default mutual tolerance touch sensing amount；If
Nothing, then recognize there is not touching object on the Trackpad；
If so, then judging whether sensing group's shape that the plurality of induction point is constituted meets touching object sensing group's shape
(S105), if not corresponding, recognize on the Trackpad without touching object.
Above-described embodiment is to scan the judgement that the contact panel 10 carries out having touchless object with mutual capacitance type, due to a touching
Object can correspond to one has the sensing group of multiple induction points, therefore can be by judging that sensing group's shape is identified whether have touch control object
Body；As shown in fig. 6, the contact panel 10 of the fluid-borne object and touching object for including diverse location with the scanning of full point type is obtained
Full point type sensing picture frame, although also there is the sensing group 20 with multiple induction points in fluid-borne object, but its induction point sensing
Measure the sensing amount distribution scenario of distribution scenario and induction point in the sensing group 30 of touching object and differ, maximum difference exists
In fluid-borne object sensing amount of the sensing centre sensing amount of group 20 compared with its periphery induction point for low, even 0 or negative value, and touch
The sensing group 30 of object is then that middle sensing amount is height compared with its periphery, even up to；Therefore thereby mode equally can first recognize this
Whether have on contact panel in the presence of touching object, once confirm touchless object, start to perform Fig. 1 remaining step (S11~
S14)。
Furthermore, other noises (such as charging noise or LCM noises) are mistaken for fluid-borne object to exclude the present invention, then may be used
The further default number of setting one, and read the full point type sensing picture frame of the default number, when judging all full point type influence charts
After the actual induction point quantity of frame exceedes preset critical, just recognize that fluid-borne object is present.Actual flow chart such as Fig. 7 for realizing
Shown, it is included：
A () judges touchless object (S10 ') on contact panel 10；
B () reads a full point type and senses picture frame (S11), the contact panel is scanned with mutual tolerance scan mode, obtains the full point
Formula senses picture frame；
C () calculates actual induction point quantity (S12), in each full point type sensing picture frame, the influence value of induction point is exceeded
The induction point of one liquid influence value is considered as actual induction point, and calculates actual induction point quantity；
D whether () judges the actual induction point quantity more than a preset critical (S13), if otherwise return to step (a)；If
It is then to further determine whether to reach default number (S131), if not yet reaching default number, return to step (a)；If having reached
The default number, then perform next step；And
E () recognizes that the fluid-borne object has (S14).
From above-mentioned steps (a) to (e), when each full point type sensing of the full point type sensing picture frame of continuous default number
The actual induction point quantity of picture frame, when more than a predetermined inductive critical value, is then identified as fluid-borne object presence, and exclude whereby
The shorter noise of time of occurrence (such as charging noise)；Certain above-mentioned steps (a) judge that the judgment mode of touchless object equally may be used
Using the practice of the first or second preferred embodiment.
In sum, the main full point type sensing picture frame that capacitance change is produced so that easy liquid body is disturbed of the present invention is carried out
The identification that liquid whether there is, and it is determined that starting to read the full point type sensing picture frame, and default liquid sensing after touchless object
Value, if the influence value of the induction point of full point type sensing picture frame has more than the liquid influence value, and influence value exceedes liquid influence value
Induction point quantity exceed preset critical, that is, confirm with the presence of fluid-borne object；In this way, the liquid mark can be marked
Note, the interference operation that liquid is present on contact panel is excluded with sharp subsequent execution.
Claims (6)
1. a kind of Liquid identification method of contact panel, including：
Judge touchless object on contact panel；
At least one full point type sensing picture frame is read, the contact panel is scanned with mutual tolerance scan mode, obtain the full point type influence chart
Frame；
Actual induction point quantity is calculated, in the full point type sensing picture frame, by the influence value of induction point more than a liquid influence value
The induction point be considered as actual induction point, and calculate actual induction point quantity；And
Identification fluid-borne object, when judging the actual induction point quantity more than a preset critical, then there is fluid-borne object in identification.
2. the Liquid identification method of contact panel according to claim 1, it is characterised in that exist in identification fluid-borne object
Afterwards, the liquid mark of mark one.
3. the Liquid identification method of contact panel according to claim 2, it is characterised in that above-mentioned identification fluid-borne object step
The rapid default number of further setting one, and the full point type sensing picture frame of the default number is further read, and judge all full points
After the actual induction point quantity of formula sensing picture frame exceedes preset critical, just recognize that fluid-borne object is present.
4. the Liquid identification method of the contact panel according to claim 1,2 or 3, it is characterised in that above-mentioned judgement touch-control
Touchless object step, includes on panel：
The contact panel is scanned with self-tolerant, while a plurality of line of induction of the driven in phase signal to the contact panel is exported, to obtain
Obtain the sensing amount of each bar line of induction of the contact panel；
Judge whether the sensing amount of each line of induction is default more than one from appearance touch sensing amount；If nothing, on current contact panel not
There is touching object.
5. the Liquid identification method of the contact panel according to claim 1,2 or 3, it is characterised in that above-mentioned judgement touch-control
Touchless object step, includes on panel：
The contact panel is scanned with mutual capacitance type, to obtain a sensing picture frame；
Judge whether include multiple induction points on the sensing picture frame, its sensing amount is more than a default mutual tolerance touch sensing amount；
If so, then judge whether sensing group's shape that the plurality of induction point is constituted meets touching object sensing group's shape, if not phase
Fu Ze is recognized on the contact panel without touching object.
6. the Liquid identification method of contact panel according to claim 5, it is characterised in that the above-mentioned the plurality of sensing of judgement
During the arrayed feature that point is constituted is not the arrayed feature step for touch object, in finding out the arrangement scope that multiple induction points are constituted
Between induction point, be not the arrayed feature for touching object if middle induction point is less than the influence value of multiple induction points.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102115681 | 2013-05-02 | ||
| TW102115681A TWI502458B (en) | 2013-05-02 | 2013-05-02 | Method of identifying a liquid object on a touch panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104133600A CN104133600A (en) | 2014-11-05 |
| CN104133600B true CN104133600B (en) | 2017-06-30 |
Family
ID=51806297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310205765.4A Active CN104133600B (en) | 2013-05-02 | 2013-05-29 | Liquid identification method of touch panel |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104133600B (en) |
| TW (1) | TWI502458B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105988620A (en) * | 2015-02-13 | 2016-10-05 | 冠捷投资有限公司 | Touch display device and method for detecting and removing moisture condensation |
| TWI653562B (en) * | 2015-11-06 | 2019-03-11 | 禾瑞亞科技股份有限公司 | Single-finger touch processing system, device and method |
| TWI567624B (en) * | 2015-12-16 | 2017-01-21 | 鹽光股份有限公司 | Capacitive Sensor Device And Detecting Method For A Conductive?Matter Therein |
| TWI585664B (en) * | 2016-04-01 | 2017-06-01 | Imagination Broadway | Touch panel identification method |
| EP3457265A4 (en) * | 2017-07-18 | 2019-06-26 | Shenzhen Goodix Technology Co., Ltd. | Method, device and touch-control detection device for finger positioning on touchscreen in wet state |
| CN109426380B (en) * | 2017-08-28 | 2021-12-21 | 奇景光电股份有限公司 | Touch device, sensing method thereof and touch sensing circuit |
| TWI692711B (en) * | 2018-06-05 | 2020-05-01 | 義隆電子股份有限公司 | Method of detecting liquid on capacitive touch panel and controller thereof |
| CN110596761A (en) * | 2018-06-12 | 2019-12-20 | 义隆电子股份有限公司 | Liquid detection method and controller of capacitive touch panel |
| CN109343751B (en) * | 2018-08-23 | 2022-03-04 | 维沃移动通信有限公司 | Mobile terminal and driving method |
| CN109743803B (en) * | 2019-01-02 | 2021-03-26 | 合肥京东方光电科技有限公司 | Water removal device, water removal system and water removal method |
| CN113220168B (en) * | 2020-01-21 | 2024-02-09 | 纮康科技股份有限公司 | Multi-mode operation method of capacitive touch panel |
| CN114327161A (en) * | 2021-12-28 | 2022-04-12 | 北京集创北方科技股份有限公司 | Touch device and touch positioning method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI533166B (en) * | 2011-09-22 | 2016-05-11 | 義隆電子股份有限公司 | Method of identifying touch object |
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- 2013-05-02 TW TW102115681A patent/TWI502458B/en active
- 2013-05-29 CN CN201310205765.4A patent/CN104133600B/en active Active
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|---|---|---|---|---|
| TW200709025A (en) * | 2005-03-31 | 2007-03-01 | Tyco Electronics Corp | Method and apparatus for touch sensor with interference rejection |
| CN101930327A (en) * | 2009-06-22 | 2010-12-29 | 联咏科技股份有限公司 | Coordinate algorithm and position sensing system of touch panel |
| US20110273398A1 (en) * | 2010-05-04 | 2011-11-10 | Tpk Touch Solutions (Xiamen) Inc. | Capacitive Touch Panel, Manufacturing Method and Scanning Method |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201443748A (en) | 2014-11-16 |
| TWI502458B (en) | 2015-10-01 |
| CN104133600A (en) | 2014-11-05 |
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