CN104267865A - Touch screen and induction point scanning method - Google Patents
Touch screen and induction point scanning method Download PDFInfo
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- CN104267865A CN104267865A CN201410566820.7A CN201410566820A CN104267865A CN 104267865 A CN104267865 A CN 104267865A CN 201410566820 A CN201410566820 A CN 201410566820A CN 104267865 A CN104267865 A CN 104267865A
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- matrix
- block
- touch
- ordinate
- scan
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
Abstract
The invention provides a touch screen and an induction point scanning method thereof. The induction point scanning method of the touch screen comprises the following steps of S01 dividing a capacitive screen into matrix blocks and enabling all induction points in the capacitive screen to be corresponding to matrix elements in the matrix blocks one to one; S02 receiving two or more than two touch positions simultaneously touching the capacitive screen and correlating the touch positions and the matrix elements of the matrix blocks according to the induction points which are corresponding to the touch positions to generate into target elements; S03 sequentially scanning the target elements in the matrix blocks line by line from the vertical directions of the matrix blocks, meanwhile sequentially scanning the target elements in the matric blocks from the horizontal directions of the matrix blocks and acquiring horizontal coordinates and vertical coordinates of the target elements and horizontal and vertical peak value direction of electric quantity change of the target elements; S04 combing to form into objective coordinates and determining the touch positions. The induction point scanning method of the touch screen can simultaneously recognize the two or more than two touch positions.
Description
Technical field
The present invention relates to a kind of capacitive touch screen, particularly relate to a kind of touch-screen and induction point scan method thereof.
Background technology
Along with the development of science and technology, touch-screen has replaced mechanical botton panel gradually becomes the new interactive interface of the electronic equipment such as mobile phone, notebook.Touch-screen comprises resistive touch screen, infrared touch panel and capacitive touch screen, is the positional information obtaining touch point during its location.Capacitive touch screen due to its transmittance, sharpness and reliability better, and obtain and use widely.
The scheme sensor combinations of current self-capacitance touch screen is simple, mainly contains two kinds of forms: a kind of is the electric capacity arrangement of cross modal anyhow, and another kind is that the electric capacity of a pair symmetrical mutual dislocation of pattern area equal proportion is controlled.The first form is when two or more touch points, and 2 or plural points are not in same scan line, and for 2, can obtain two peak values from line scanning, namely two ordinates, be Y1, Y2 respectively.Can find two horizontal ordinates after column scan, be X1, X2 respectively.These two groups of coordinates have two kinds of combinations: be (Y1X1, Y2X2) and (Y1X2, Y2X1) respectively, and easy generation is not actual " terrible point ", the second form, and when two refer to be put between same a pair electric capacity, X-axis cannot decomposite two coordinates.And Y-axis also only has a peak value cannot tell 2 existence from data.
Summary of the invention
Technical matters to be solved by this invention is: provide a kind of touch-screen and the induction point scan method thereof that can detect two or more induction points simultaneously.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: the induction point scan method providing a kind of touch-screen, comprises the steps:
S01, capacitance plate is divided into matrix-block, in capacitance plate all induction points all with the matrix element one_to_one corresponding in matrix-block;
S02, receive and touch two or more touch location on capacitance plate simultaneously, and according to the induction point corresponding with touch location touch location associated with the matrix element of matrix-block and generate object element;
Object element S03, matrix-block of lining by line scan successively from the vertical direction of matrix-block, simultaneously scan by column object element matrix-block successively from the horizontal direction of matrix-block, obtain the horizontal ordinate of object element and the transverse direction of ordinate and object element electric quantity change and longitudinal peak Distribution;
Horizontal ordinate and the ordinate of S04, composite object matrix element form object coordinate, when matrix element exists two peak value summits at object coordinate, judge that this object coordinate is as touch location, otherwise, judge that this object coordinate is not touch location.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: provide a kind of touch-screen, comprises and divides module, respond module, scan module and combination and judge module;
Divide module, for capacitance plate is divided into matrix-block, in capacitance plate all induction points all with the matrix element one_to_one corresponding in matrix-block;
Respond module, touches two or more touch location on capacitance plate for receiving simultaneously, and to be associated with the matrix element of matrix-block by touch location according to the induction point corresponding with touch location and generate object element;
Scan module, to line by line scan successively object element in matrix-block for the vertical direction from matrix-block, simultaneously scan by column object element matrix-block successively from the horizontal direction of matrix-block, obtain the horizontal ordinate of object element and the transverse direction of ordinate and object element electric quantity change and longitudinal peak Distribution;
Combination and judge module, form object coordinate for the horizontal ordinate of composite object matrix element and ordinate, when matrix element exists two peak value summits at object coordinate, judge that this object coordinate is as touch location, otherwise, judge that this object coordinate is not touch location.
Beneficial effect of the present invention is: be different from the position coordinates that capacitance plate of the prior art can not differentiate two or more induction points simultaneously, the invention provides a kind of induction point scan method of touch-screen, touch-screen is first divided into matrix-block by main employing, and by corresponding with matrix element for induction point on touch-screen, then trigger while responding two or more, adopt the horizontal ordinate and the ordinate that scan object element line by line with the mode be combined by column, according to the coordinate of the peak Distribution determination touch location of object element after combination, two or more touch location can be differentiated simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the induction point scan method of inventive touch screen;
Fig. 2 is the module diagram of inventive touch screen.
Label declaration:
1, module is divided; 2, respond module; 3, scan module; 4, combination and judge module.
Embodiment
By describing technology contents of the present invention in detail, realized object and effect, accompanying drawing is coordinated to be explained below in conjunction with embodiment.
The design of most critical of the present invention is: adopt and first touch-screen is divided into matrix-block, and by corresponding with matrix element for induction point on touch-screen, then trigger while responding two or more, adopt the horizontal ordinate and the ordinate that scan object element line by line with the mode be combined by column, according to the coordinate of the peak Distribution determination touch location of object element after combination, two or more touch location can be differentiated simultaneously.
Please refer to the induction point scan method of a kind of touch-screen of Fig. 1, comprise the steps:
S01, capacitance plate is divided into matrix-block, in capacitance plate all induction points all with the matrix element one_to_one corresponding in matrix-block;
S02, receive and touch two or more touch location on capacitance plate simultaneously, and according to the induction point corresponding with touch location touch location associated with the matrix element of matrix-block and generate object element;
Object element S03, matrix-block of lining by line scan successively from the vertical direction of matrix-block, simultaneously scan by column object element matrix-block successively from the horizontal direction of matrix-block, obtain the horizontal ordinate of object element and the transverse direction of ordinate and object element electric quantity change and longitudinal peak Distribution;
Horizontal ordinate and the ordinate of S04, composite object matrix element form object coordinate, when matrix element exists two peak value summits at object coordinate, judge that this object coordinate is as touch location, otherwise, judge that this object coordinate is not touch location.
From foregoing description, beneficial effect of the present invention is: be different from the position coordinates that capacitance plate of the prior art can not differentiate two or more induction points simultaneously, the invention provides a kind of induction point scan method of touch-screen, touch-screen is first divided into matrix-block by main employing, and by corresponding with matrix element for induction point on touch-screen, then trigger while responding two or more, adopt the horizontal ordinate and the ordinate that scan object element line by line with the mode be combined by column, according to the coordinate of the peak Distribution determination touch location of object element after combination, two or more touch location can be differentiated simultaneously.
Further, in described step S03, the horizontal ordinate of object element is for obtaining lining by line scan in matrix-block, stops lining by line scan after the horizontal ordinate of object element to be obtained.This step can shorten the number of times of lining by line scan, and improve the efficiency of lining by line scan, processing speed is faster.
Further, in described step S03, the ordinate of object element is for obtaining scanning by column in matrix-block, stops scanning by column after the ordinate of object element to be obtained.This step can shorten the number of times scanned by column, and improve the efficiency scanned by column, processing speed is faster.
Further, the working frequency range of described touch-screen is 3MHZ-5MHZ.The signal of touch-screen is mainly common-mode signal, and signal energy mainly concentrates on low-frequency range, and frequency is higher, and energy is less, and the interference performance of its correspondence is more weak, therefore, has good antijamming capability.
To sum up, the induction point scan method of touch-screen provided by the invention, touch-screen is first divided into matrix-block by main employing, and by corresponding with matrix element for induction point on touch-screen, then trigger while responding two or more, adopt the horizontal ordinate and the ordinate that scan object element line by line with the mode be combined by column, according to the coordinate of the peak Distribution determination touch location of object element after combination, two or more touch location can be differentiated simultaneously.In addition, adopt the horizontal ordinate and ordinate scanning lining by line scan and scan by column and only complete object element, to all matrix elemental scan, need not can improve scan efficiency, also there is preferably antijamming capability simultaneously.
Consult Fig. 2, a kind of touch-screen, comprise and divide module 1, respond module 2, scan module 3 and combination and judge module 4;
Divide module 1, for capacitance plate is divided into matrix-block, in capacitance plate all induction points all with the matrix element one_to_one corresponding in matrix-block;
Respond module 2, touches two or more touch location on capacitance plate for receiving simultaneously, and to be associated with the matrix element of matrix-block by touch location according to the induction point corresponding with touch location and generate object element;
Scan module 3, to line by line scan successively object element in matrix-block for the vertical direction from matrix-block, simultaneously scan by column object element matrix-block successively from the horizontal direction of matrix-block, obtain the horizontal ordinate of object element and the transverse direction of ordinate and object element electric quantity change and longitudinal peak Distribution;
Combination and judge module 4, form object coordinate for the horizontal ordinate of composite object matrix element and ordinate, when matrix element exists two peak value summits at object coordinate, judge that this object coordinate is as touch location, otherwise, judge that this object coordinate is not touch location.
In sum, the scan method that touch-screen applications provided by the invention is above-mentioned, quickly and accurately to the coordinate determining touch location, can be convenient to the process of subsequent treatment chip.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalents utilizing instructions of the present invention and accompanying drawing content to do, or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. an induction point scan method for touch-screen, is characterized in that, comprise the steps:
S01, capacitance plate is divided into matrix-block, in capacitance plate all induction points all with the matrix element one_to_one corresponding in matrix-block;
S02, receive and touch two or more touch location on capacitance plate simultaneously, and according to the induction point corresponding with touch location touch location associated with the matrix element of matrix-block and generate object element;
Object element S03, matrix-block of lining by line scan successively from the vertical direction of matrix-block, simultaneously scan by column object element matrix-block successively from the horizontal direction of matrix-block, obtain the horizontal ordinate of object element and the transverse direction of ordinate and object element electric quantity change and longitudinal peak Distribution;
Horizontal ordinate and the ordinate of S04, composite object matrix element form object coordinate, when matrix element exists two peak value summits at object coordinate, judge that this object coordinate is as touch location, otherwise, judge that this object coordinate is not touch location.
2. the induction point scan method of touch-screen according to claim 1, is characterized in that, in described step S03, the horizontal ordinate of object element is for obtaining lining by line scan in matrix-block, stops lining by line scan after the horizontal ordinate of object element to be obtained.
3. the induction point scan method of touch-screen according to claim 1, is characterized in that, in described step S03, the ordinate of object element is for obtaining scanning by column in matrix-block, stops scanning by column after the ordinate of object element to be obtained.
4. the induction point scan method of the touch-screen according to any one of claim 1-3, is characterized in that, the working frequency range of described touch-screen is 3MHZ-5MHZ.
5. a touch-screen, is characterized in that, comprises and divides module, respond module, scan module and combination and judge module;
Divide module, for capacitance plate is divided into matrix-block, in capacitance plate all induction points all with the matrix element one_to_one corresponding in matrix-block;
Respond module, touches two or more touch location on capacitance plate for receiving simultaneously, and to be associated with the matrix element of matrix-block by touch location according to the induction point corresponding with touch location and generate object element;
Scan module, to line by line scan successively object element in matrix-block for the vertical direction from matrix-block, simultaneously scan by column object element matrix-block successively from the horizontal direction of matrix-block, obtain the horizontal ordinate of object element and the transverse direction of ordinate and object element electric quantity change and longitudinal peak Distribution;
Combination and judge module, form object coordinate for the horizontal ordinate of composite object matrix element and ordinate, when matrix element exists two peak value summits at object coordinate, judge that this object coordinate is as touch location, otherwise, judge that this object coordinate is not touch location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410566820.7A CN104267865A (en) | 2014-10-22 | 2014-10-22 | Touch screen and induction point scanning method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410566820.7A CN104267865A (en) | 2014-10-22 | 2014-10-22 | Touch screen and induction point scanning method |
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| CN104267865A true CN104267865A (en) | 2015-01-07 |
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| CN201410566820.7A Pending CN104267865A (en) | 2014-10-22 | 2014-10-22 | Touch screen and induction point scanning method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090273579A1 (en) * | 2008-04-30 | 2009-11-05 | N-Trig Ltd. | Multi-touch detection |
| CN101887335A (en) * | 2009-05-14 | 2010-11-17 | 奥博特瑞克斯株式会社 | Capacitive touch panel device |
| US8462135B1 (en) * | 2009-01-08 | 2013-06-11 | Cypress Semiconductor Corporation | Multi-touch disambiguation |
| TW201333791A (en) * | 2012-02-13 | 2013-08-16 | Chunghwa Picture Tubes Ltd | Touch device and touch sensing method thereof |
-
2014
- 2014-10-22 CN CN201410566820.7A patent/CN104267865A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090273579A1 (en) * | 2008-04-30 | 2009-11-05 | N-Trig Ltd. | Multi-touch detection |
| US8462135B1 (en) * | 2009-01-08 | 2013-06-11 | Cypress Semiconductor Corporation | Multi-touch disambiguation |
| CN101887335A (en) * | 2009-05-14 | 2010-11-17 | 奥博特瑞克斯株式会社 | Capacitive touch panel device |
| TW201333791A (en) * | 2012-02-13 | 2013-08-16 | Chunghwa Picture Tubes Ltd | Touch device and touch sensing method thereof |
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Address after: 518110 Guangdong province Shenzhen city Longhua District No. two Fu Guanlan Street Community Ao Bei Dafu Industrial Zone Peng Longpan high-tech park B building 4 floor Applicant after: CINOTOP ELECTRONICS CO., LTD. Address before: 518000 Guangdong city of Shenzhen province Baoan District Guanlan Street rich industrial zone two road Peng Longpan high-tech park B building 4 floor Applicant before: Shenzhen Zhi Ling Wei Ye Technology Co., Ltd. |
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Application publication date: 20150107 |