CN101751194B - Touch control panel with function of multi-point touch control and multi-point touch control detecting method - Google Patents
Touch control panel with function of multi-point touch control and multi-point touch control detecting method Download PDFInfo
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Abstract
The invention provides a touch control panel with the function of multi-point touch control and a multi-point touch control detecting method. The touch control panel with the function of multi-point touch control comprises a transparent conductive glass, a transparent conductive film, first lead wires, second lead wires and a main detecting module. The transparent conductive film is arranged correspondingly to the transparent conductive glass. The two first lead wires are respectively arranged at the two corresponding side edges of the transparent conductive glass, and are used for providing fixed voltage. The two second lead wires are respectively arranged at the two corresponding side edges of the transparent conductive film, and are also used for providing the fixed voltage. The second lead wires are vertical to the first lead wires. When touch control is carried out on the transparent conductive film so as to lead the transparent conductive film to be in contact and communication with the transparent conductive glass, differential voltage corresponding to the fixed voltage is generated. The main detecting module obtains touch control resistance value according to the fixed voltage and the differential voltage; when comparison shows that the touch control resistance value is lower than preset resistance value, the multi-point touch control mode is started after judgment.
Description
Technical field
The present invention is about a kind of contact panel and its touch detection method, particularly a kind of contact panel of tool multi-point touch function and multi-point touch sensing method.
Background technology
Science and technology is showing improvement or progress day by day, and makes the application of touch panel more and more extensive, and touch panel is from the early stage Jin You military or some special applications adopts, and existing many electronic products all possess touch panel up till now, and utilize touch control manner input.Because, touch panel has than traditional input media advantage such as intuitive, hommization more, so contact panel strides forward towards the trend that replaces conventional keyboard, mouse etc. gradually, and becomes the most popular at present inputting interface.
Along with electronic product function constantly promotes, corresponding input type also increases day by day, thus contact panel also by single-point touch in the past, to be evolved be gradually multi-point touch (multi-touch).Infrared inductor) in conventional practice, contact panel will reach multi-point touch function, mostly adopts capacitance type touch-control panel or installs inductor additional (such as the correlation technique and being realized such as.Or, have in main frame inside with many Charged Coupled Devices (charge coupled device, CCD) video camera, a digital optical processing projector (digital light processing again arranges in pairs or groups, DLP) correlation technique proposes, and reaches the object of differentiating multi-point touch signal.
Yet, no matter above-mentioned, being employing condenser type, installing the correlation techniques such as inductor or video camera additional, the cost producing all increases many compared with electric resistance touch-control panel.Because electric resistance touch-control panel has advantages of lower cost, so electric resistance touch-control panel occupies Gao city and accounts for rate in polytype contact panel.Wherein, electric resistance touch-control panel can be divided into four-wire type, five-line, eight line formulas etc., and and minimum with the cost of four-wire type contact panel.Yet four-wire type contact panel traditionally, only can reach single-point touch, if there is multiple spot to carry out touch-control action simultaneously, four-wire type contact panel is because being recognized as multi-point touch, and causes controlling smoothly cursor to carry out relevant action.
Summary of the invention
The present invention proposes a kind of contact panel of tool multi-point touch function, comprises: transparent conducting glass, transparent conductive film, the first wire, the second wire and main detecting module.Transparent conductive film configures corresponding to transparent conducting glass.Article two, the first wire is arranged at respectively the corresponding dual side-edge of transparent conducting glass, in order to fixed voltage to be provided.Article two, the second wire is arranged at respectively the corresponding dual side-edge of transparent conductive film, and the second wire and the first wire be arranged perpendicular, and in order to fixed voltage to be provided.When touch-control transparent conductive film makes transparent conductive film contact conducting with transparent conducting glass, produce the dividing potential drop corresponding to fixed voltage.Main detecting module is obtained touch-control resistance value according to fixed voltage and dividing potential drop, and when relatively touch-control resistance value is less than preset resistance value, judgement enters multi-point touch pattern.Wherein, preset resistance value is less than the minimum value of the corresponding touch-control resistance value of single-point touch, and is greater than the maximal value of the corresponding touch-control resistance value of multi-point touch.
The present invention also proposes a kind of multi-point touch sensing method, is applied to contact panel, and contact panel comprises: transparent conducting glass; Transparent conductive film, is disposed on transparent conducting glass; Article two, the first wire, is arranged at respectively the dual side-edge of transparent conducting glass, in order to fixed voltage to be provided; Article two, the second wire, is arranged at respectively the dual side-edge of transparent conductive film, and these second wires and these the first wires be arranged perpendicular, and in order to fixed voltage to be provided, comprises the following step: by contact panel, receive fixed voltage; When transparent conductive film is during by touch-control, produce the dividing potential drop corresponding to fixed voltage; According to fixed voltage and dividing potential drop, obtain touch-control resistance value; Compare touch-control resistance value and preset resistance value; When touch-control resistance value is less than preset resistance value, judgement contact panel enters multi-point touch pattern.Wherein, preset resistance value is less than the minimum value of the corresponding touch-control resistance value of single-point touch, and is greater than the maximal value of the corresponding touch-control resistance value of multi-point touch.
By contact panel proposed by the invention or method, make lower-cost contact panel there is the function of multi-point touch.So, do not need the capacitance type touch-control panel that adopts cost comparatively high, or install inductor, video camera etc. additional, can reach multi-point touch function, therefore cost-effective expenditure significantly.
Relevant preferred embodiment of the present invention and effect thereof, hereby coordinate graphic explanation as after.
Fig. 1 is the first embodiment schematic diagram of the contact panel of tool multi-point touch function.
Fig. 2 A is the circuit diagram () of the contact panel of tool multi-point touch function.
Fig. 2 B is the circuit diagram (two) of the contact panel of tool multi-point touch function.
Fig. 2 C is the circuit diagram (three) of the contact panel of tool multi-point touch function.
Fig. 2 D is the circuit diagram (four) of the contact panel of tool multi-point touch function.
Fig. 3 A is the second embodiment schematic diagram of the contact panel of tool multi-point touch function.
Fig. 3 B is the circuit diagram (five) of the contact panel of tool multi-point touch function.
Fig. 3 C is the circuit diagram (six) of the contact panel of tool multi-point touch function.
Fig. 4 is the 3rd embodiment schematic diagram of the contact panel of tool multi-point touch function.
Fig. 5 A rotates the schematic diagram of picture in multi-point touch pattern.
Fig. 5 B is the schematic diagram of image zooming in multi-point touch pattern.
Fig. 5 C is the schematic diagram () of mobile scroll bar in multi-point touch pattern.
Fig. 5 D is the schematic diagram (two) of mobile scroll bar in multi-point touch pattern.
Fig. 6 is the process flow diagram of multi-point touch sensing method.
Embodiment
Please refer to Fig. 1, this figure is depicted as the first embodiment schematic diagram of the contact panel of tool multi-point touch function.The contact panel 1 of tool multi-point touch function proposed by the invention comprises: transparent conducting glass 10, transparent conductive film 20, the first wire 30, the second wire 40 and main detecting module 50.
Transparent conductive film (ITO film) 20 configures corresponding to transparent conducting glass (ITO glass) 10, and shown in figure, transparent conductive film 20 is arranged at the top of transparent conducting glass 10.In this, can be middle with transparent conductive film 20 at transparent conducting glass 10, utilize, every ball (dot spacer), these two layers of electric conductors are separated to (not shown).So, can avoid no touch contact panel 1 but to cause short circuit and the situation that produces misoperation occurs.This exterior palpi explanation, thus for convenience of explaining, the transparent conducting glass in graphic 10 and transparent conductive film 20 are drawn with upper and lower separating type, so in fact the two is to combine between the higher and lower levels to be integrated.
The quantity of the first wire 30 can be two, and is arranged at respectively the corresponding dual side-edge of transparent conducting glass 10, and provides fixed voltage by the first wire 30.The way of one embodiment can be, and by two the first wires 30, provides respectively 0 volt of voltage and 5 volts of voltages, and allows transparent conducting glass 10 produce a uniform electric field.
The quantity of the second wire 40 can be two, and is arranged at respectively the corresponding dual side-edge of transparent conductive film 20, and the second wire 40 and the first wire 30 be arranged perpendicular, and provides fixed voltage by the second wire 40.The way of one embodiment can be, and by two the second wires 40, provides respectively 0 volt of voltage and 5 volts of voltages, allows equally transparent conductive film 20 produce a uniform electric field.From said modules configuration instruction, contact panel 1 proposed by the invention is four-wire resistance type contact panel.
When user utilizes finger, pen or other medium touch-control transparent conductive film 20, can make transparent conductive film 20 contact and conducting with transparent conducting glass 10, now produce the dividing potential drop corresponding to fixed voltage.
Please also refer to Fig. 2 A and Fig. 2 B, be respectively the circuit diagram () and (two) of the contact panel of tool multi-point touch function.Utilize the transparent conductive film 20 on upper strata and the transparent conducting glass 10 of lower floor to be responsible for respectively X-axis and Y-axis coordinate.Utilize 2 principles that can determine a tram, when when contact panel 1 is pressed, just making 10 contacts of upper strata transparent conductive film 20Yu lower floor transparent conducting glass with finger, pen or other medium, form short circuit and produce pressure drop.As Fig. 2 A represents the circuit diagram of X-axis voltage (Vx) to utilize dividing potential drop theorem can obtain an X-axis electrical voltage point Vx on transparent conductive film 20.In like manner, as shown in Figure 2 B, be the circuit diagram of Y-axis voltage (Vy), utilize dividing potential drop theorem can on transparent conducting glass 10, obtain a Y-axis electrical voltage point Vy.When obtaining Vx and Vy voltage, just magnitude of voltage can be converted to a coordinate figure, and learn the coordinate information of touch point.
Please continue with reference to Fig. 1, the dividing potential drop of gained after the fixed voltage that wherein main detecting module 50 provides according to above-mentioned first and second wire 30,40 and touch-control, and obtain touch-control resistance value.Then compare touch-control resistance value and preset resistance value, when touch-control resistance value is less than preset resistance value, i.e. judgement enters multi-point touch pattern.In lower explanation, obtain the derivation of touch-control resistance value, referring to Fig. 2 A～Fig. 2 D.
In above formula, because V/ (Rx1+Rx2) is a constant, therefore by above-mentioned derivation, can be learnt: R
touchfor Vx
*(Vz1/Vz0-1) be multiplied by a constant, and this constant is relevant to the characteristic of contact panel.Wherein, R
touchfor touch-control resistance, V for fixingly pressing, Vx0 is that x axle dividing potential drop, Vz0 and Vz1 are respectively in Fig. 2 C and Fig. 2 D in conjunction with after the X-axis bleeder circuit of Fig. 2 A and the Y-axis bleeder circuit of Fig. 2 B, the voltage at obtained touch-control resistance two ends.
Via experimental data, learn again, when contact panel 1 only has a touch point to press, detect produced touch-control resistance value relevant with the strength of pressing.When the strength of pressing when touch-control is larger, the touch-control resistance value producing just can be less, and experimental data shows approximately slightly 170 left and right of the corresponding touch-control resistance value of single-point touch minimum.
On the other hand, when contact panel 1 is multi-point touch, suppose that touch point is 2 points, experiment method is done diagonal angle with two fingers and is changed, that is do movement in diagonally opposing corner mode, and measure its touch-control resistance value, find that touch-control resistance value can be less than 50 when two fingers are pressed, and maximum touch-control resistance value can not surpass 150 yet.Another kind of multi-point touch experiment, does vertical mobile variation with two fingers, detects approximately slightly 50 left and right of resistance value.As shown in the above description, during multi-point touch because be equivalent to have a plurality of touch-control resistance in parallel mutually, thus the touch-control resistance value of multi-point touch can come than the touch-control resistance value of single-point touch little.So, by above-mentioned experimental data, can draw up the preset resistance value corresponding to multi-point touch, that is the resistance threshold value of multi-point touch.That is to say, when the touch-control resistance value detecting when main detecting module 50 is less than preset resistance value, just represent that contact panel 1 has a plurality of touch points to be pressed, therefore judge that contact panel 1 enters multi-point touch pattern.
In this, need the above-mentioned mentioned numeral of touch-control resistance value of explanation, its unit is not the ohmic value that general resistance is used, and only can be referred to as the relative value of resistance, and this is to be multiplied by due to a constant (being the V/ (Rx1+Rx2) of aforementioned formula in deriving) because touch-control resistance value has.
Please refer to Fig. 3 A, this figure is depicted as the second embodiment schematic diagram of the contact panel of tool multi-point touch function.In order to allow contact panel proposed by the invention 1 detect more accurately multi-point touch, therefore in the second embodiment, also comprise: secondary detecting module 60.
While is with reference to Fig. 3 B, Fig. 3 C and contrast Fig. 2 A, Fig. 2 B, and when many fingers touching contact panels 1, the X-axis dividing potential drop (as shown in Figure 2 A) that the first touch point produces is Vx0, and the X-axis dividing potential drop (as shown in Figure 3 B) that the second touch point produces is Vx1.Wherein, the two difference of Vx0 and Vx1 can be greater than predeterminated voltage difference.In like manner, the Y-axis dividing potential drop (as shown in Figure 2 B) that the first touch point produces is Vy0, and the Y-axis dividing potential drop (as shown in Figure 3 C) that the second touch point produces is Vy1.Wherein, the two difference of Vy0 and Vy1 is greater than predeterminated voltage difference equally.Utilize this characteristic, when user puts touch for panel 1, secondary detecting module 60 detects the corresponding dividing potential drop producing, and wherein dividing potential drop can be X-axis voltage and Y-axis voltage.And multi-point touch has a voltage characteristic, that is when touch point is positioned at upper left and ，Huo upper right, bottom right and lower-left, can cause X-axis voltage or Y-axis voltage to have great variation (that is, the above-mentioned explanation to Fig. 3 B, Fig. 3 C contrast Fig. 2 A, Fig. 2 B).That is to say, the voltage differences between two touch points (Δ V) has great change, and when two touch points distances are when far away, voltage differences is more obvious.Therefore, utilize this voltage characteristic, when the two difference of the X-axis voltage that secondary detecting module 60 produces according to dividing potential drop and Y-axis voltage is greater than predeterminated voltage difference, just judgement enters multi-point touch pattern.So, by secondary detecting module 60, as judgement, enter the complementary detecting of multi-point touch pattern, can promote the accuracy in judgement.
Please refer to Fig. 4, this figure is depicted as the 3rd embodiment schematic diagram of the contact panel of tool multi-point touch function.The processing modules 70 that increase in the 3rd implements more.
When contact panel 1 enters multi-point touch pattern, represent to have at least two touch points to produce, in this, take two touch points and explain as example.When entering multi-point touch pattern, contact panel 1 comprises the first touch point 81 and the second touch point 82.Now, processing module 70 obtains the change in location of the second touch point 82, according to change in location, obtains corresponding key information, and according to key information, controls the shown picture of contact panel 1.
Wherein, key information record is corresponding with it presses key definition that is the corresponding relation of pressing key definition of each key information and keyboard or mouse.Record the corresponding relation of the input definition of each key information and other input media, use and allow the direct touch-control contact panel 1 of user can use the input function of other input media, and do not need with other input media, to enter the operating instructions in addition.
Illustrate, when user presses contact panel 1 with two fingers, will produce the first touch point 81 and the second touch point 82.Suppose, contact panel 1 now shown picture is plurality of pictures, and the first touch point 81 taps a wherein pictures, and is contact panel 1 first touch point detecting simultaneously, and the second touch point 82 is 1 second touch point detecting of contact panel.Now, user can change by moveable finger the change in location of the second touch point 82.As shown in Figure 4, if the change in location of the second touch point 82 is for changing up and down, that is to say that finger moves up and down on transparent conductive film 20 surfaces of contact panel 1, the picture that can tap the first touch point 81, the variation zooming in or out is done in the position centered by the first touch point 81.Therefore, processing module 70 can be utilized the display mode of adjusting picture centered by the first touch point 81.
Wherein, display mode has multiple example, please refer to Fig. 5 A～Fig. 5 D.Display mode can be rotation, zooms in or out, and as shown in Fig. 5 A and Fig. 5 B, the picture 2 that contact panel 1 is shown, can do corresponding rotation with the change in location of the second touch point, zoom in or out picture 2.And coordinate the multiple different change in location of the second touch point, control the shown picture 2 of contact panel 1 and can correspondingly produce various demonstration variation, as turn clockwise, be rotated counterclockwise etc.
Moreover display mode can be the scroll bar of moving image and changes the viewing area of picture, as shown in Fig. 5 C and Fig. 5 D.The shown picture 2 of contact panel 1 has scroll bar (scroll bar) 3, can, with the scroll bar 3 of the change in location moving image 2 of the second touch point, use the viewing area that changes picture 2.
In addition, display mode also can be carries out page turning and changes the viewing area of picture 2 picture 2, such as: picture 2 carried out to the page turnings such as prevpage (page up), the next page (page down) and change the viewing area of picture 2.
Please refer to Fig. 6, this figure is depicted as the process flow diagram of multi-point touch sensing method, is applied to contact panel, comprises the following step.
Step S10: receive fixed voltage by contact panel.Wherein, contact panel can be four-wire resistance type contact panel.
Step S20: when contact panel is during by touch-control, produce the dividing potential drop corresponding to fixed voltage.
Step S30: obtain touch-control resistance value according to fixed voltage and dividing potential drop.
Step S40: compare touch-control resistance value and preset resistance value.
Step S50: when touch-control resistance value is less than preset resistance value, judgement contact panel enters multi-point touch pattern.
Except above-mentioned steps, the present invention proposes extra auxiliary detecting, can comprise the following step: when having while referring to contact surface plate, will produce according to dividing potential drop X-axis voltage and Y-axis voltage more; When detecting the two X-axis voltage difference of first, second touch point, and the two Y-axis voltage difference of first, second touch point is greater than predeterminated voltage difference, i.e. judgement enters multi-point touch pattern.Above-mentioned steps, can be used as complementary detecting, makes multi-point touch sensing function more accurate.
Above-mentioned multi-point touch pattern comprises the first touch point and the second touch point.When entering multi-point touch pattern, obtain the change in location of the second touch point, according to change in location, obtain corresponding key information.So, can be according to key information, and control the shown picture of contact panel.Wherein, key information is corresponding to the key definition of pressing of keyboard or mouse.
Above-mentioned step also can comprise: the display mode of adjusting picture centered by the first touch point.In this, display mode can be rotation, zooms in or out; Or, can be the scroll bar of moving image and change the viewing area of picture; Also or, picture is carried out page turning and changes the viewing area of picture.
Although technology contents of the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention; anyly have the knack of this skill person; do not departing from spirit of the present invention a little change and the retouching done; all should be covered by category of the present invention, so protection scope of the present invention is when being as the criterion depending on claims person of defining.
Claims (9)
1. a contact panel for tool multi-point touch function, is characterized in that, comprises:
Transparent conducting glass;
Transparent conductive film, is disposed on above-mentioned transparent conducting glass;
Article two, the first wire, is arranged at respectively the dual side-edge of above-mentioned transparent conducting glass, in order to fixed voltage to be provided;
Article two, the second wire, is arranged at respectively the dual side-edge of above-mentioned transparent conductive film, and above-mentioned these second wires and above-mentioned these first wires are arranged perpendicular, and in order to above-mentioned fixed voltage to be provided, when the above-mentioned transparent conductive film of touching, produces dividing potential drop; And
Main detecting module, obtains touch-control resistance value according to above-mentioned fixed voltage and above-mentioned dividing potential drop, and when more above-mentioned touch-control resistance value is less than preset resistance value, judgement enters multi-point touch pattern,
Wherein, above-mentioned preset resistance value is less than the minimum value of the corresponding above-mentioned touch-control resistance value of single-point touch, and is greater than the maximal value of the corresponding above-mentioned touch-control resistance value of multi-point touch.
2. the contact panel of tool multi-point touch function as claimed in claim 1, is characterized in that, also comprises:
Processing module, obtains one of them the touch point change in location in above-mentioned multi-point touch pattern, obtains key information, to control the shown picture of above-mentioned contact panel according to above-mentioned change in location.
3. the contact panel of tool multi-point touch function as claimed in claim 2, is characterized in that: above-mentioned key information be keyboard or mouse by key definition.
4. the contact panel of tool multi-point touch function as claimed in claim 2, is characterized in that: above-mentioned shown picture for rotating, amplify, dwindle, page turning and control the wherein one of the scroll bar of above-mentioned picture.
5. a multi-point touch sensing method, is applied to contact panel, and above-mentioned contact panel comprises: transparent conducting glass; Transparent conductive film, is disposed on above-mentioned transparent conducting glass; Article two, the first wire, is arranged at respectively the dual side-edge of above-mentioned transparent conducting glass, in order to fixed voltage to be provided; Article two, the second wire, is arranged at respectively the dual side-edge of above-mentioned transparent conductive film, and above-mentioned these second wires and above-mentioned these first wires are arranged perpendicular, and in order to above-mentioned fixed voltage to be provided, it is characterized in that, comprises the following step:
By above-mentioned contact panel, receive above-mentioned fixed voltage;
When the above-mentioned transparent conductive film of touching, produce the dividing potential drop corresponding to above-mentioned fixed voltage;
According to above-mentioned fixed voltage and above-mentioned dividing potential drop, obtain touch-control resistance value;
More above-mentioned touch-control resistance value and preset resistance value; And
When above-mentioned touch-control resistance value is less than preset resistance value, judge that above-mentioned contact panel enters multi-point touch pattern,
Wherein, above-mentioned preset resistance value is less than the minimum value of the corresponding above-mentioned touch-control resistance value of single-point touch, and is greater than the maximal value of the corresponding above-mentioned touch-control resistance value of multi-point touch.
6. multi-point touch sensing method as claimed in claim 5, is characterized in that, also comprises the following step:
Obtain one of them the touch point change in location in above-mentioned multi-point touch pattern;
According to above-mentioned change in location, obtain key information; And
According to above-mentioned key information, control the shown picture of above-mentioned contact panel.
7. multi-point touch sensing method as claimed in claim 6, is characterized in that: above-mentioned key information be keyboard or mouse by key definition.
8. multi-point touch sensing method as claimed in claim 6, is characterized in that: above-mentioned shown picture is the wherein one of rotating, amplifying, dwindle page turning and controlling the scroll bar of above-mentioned picture.
9. multi-point touch sensing method as claimed in claim 5, is characterized in that: above-mentioned contact panel is four-wire resistance type contact panel.
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| US20130027343A1 (en) | 2011-07-29 | 2013-01-31 | Analog Devices, Inc. | Position determination techniques in resistive touch screen applications |
| CN102830887B (en) * | 2011-06-13 | 2015-07-29 | 炬芯（珠海）科技有限公司 | A kind of method of toch control of resistive touch screen and control circuit |
| CN103105956B (en) * | 2011-11-11 | 2015-05-06 | 汉王科技股份有限公司 | Position indicating device and position indicating method |
| CN102520835B (en) * | 2011-12-02 | 2014-10-22 | 展讯通信（上海）有限公司 | Touch detection method and device thereof |
| CN103412699B (en) * | 2013-06-28 | 2017-02-15 | 北京君正集成电路股份有限公司 | Method for two-point control gesture recognition of four-wire resistance touch screen |
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| CN101286107A (en) * | 2008-05-27 | 2008-10-15 | 张文 | Multi-point electric resistance touch screen |
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| US7492358B2 (en) * | 2004-06-15 | 2009-02-17 | International Business Machines Corporation | Resistive scanning grid touch panel |
| US20070257891A1 (en) * | 2006-05-03 | 2007-11-08 | Esenther Alan W | Method and system for emulating a mouse on a multi-touch sensitive surface |
| US8542211B2 (en) * | 2007-01-03 | 2013-09-24 | Apple Inc. | Projection scan multi-touch sensor array |
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| CN101231562A (en) * | 2007-01-27 | 2008-07-30 | 陈其良 | Force-sensing touch screen |
| CN101308432A (en) * | 2008-05-19 | 2008-11-19 | 北京中星微电子有限公司 | Touch screen touch point detection device and method |
| CN101286107A (en) * | 2008-05-27 | 2008-10-15 | 张文 | Multi-point electric resistance touch screen |
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