CN102830862A - Positioning method used for capacitive touch screen, positioning device, and touch system - Google Patents
Positioning method used for capacitive touch screen, positioning device, and touch system Download PDFInfo
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- CN102830862A CN102830862A CN2011101609244A CN201110160924A CN102830862A CN 102830862 A CN102830862 A CN 102830862A CN 2011101609244 A CN2011101609244 A CN 2011101609244A CN 201110160924 A CN201110160924 A CN 201110160924A CN 102830862 A CN102830862 A CN 102830862A
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Abstract
The invention discloses a positioning method used for a capacitive touch screen. The positioning method comprises the following steps: S1, detecting the variable quantity of a mutual capacitance on the capacitive touch screen; S2, judging whether an object closes to or touches the capacitive touch screen; S3, when it is judged that the object is close to the capacitive touch screen, calculating the closing zone of the object on the capacitive touch screen, conducting an picture amplification on an icon in the closing zone, repeatedly executing S2 and S3 until the capacitive touch screen is touched by the object, and executing S4: when the capacitive touch screen is touched by the object, calculating a touch coordinate of the object. The invention further discloses a positioning device used for the capacitive touch screen and a touch system with the positioning device. By adopting the invention, the misjudgment on the touch point coordinate when a plurality of icons are touched by the object at the same time can be solved, and the positioning precision of the touch point coordinate is improved.
Description
Technical field
The present invention relates to the touch technology field, particularly relate to a kind of localization method and locating device that is used for capacitance touch screen, have the touch-control system of above-mentioned locating device.
Background technology
Touch-screen utilizes the characteristics that its mechanical loss is little and volume is little, has been widely used on each electronic product.Touch-screen comprises electric resistance touch screen and capacitance touch screen.The demand of multiple point touching makes the favor that more and more receives product designer based on the theoretical touch product of mutual capacitance.
Though traditional capacitance touch screen can be realized multiple point touching, there is the low problem of precision that touches.This is because the icon sizes of display screen is limited, and object (for example finger) is easy to touch simultaneously several icons, and locating device can't be discerned correct position, thereby causes mistake to touch, and therefore can bring very big inconvenience to the user.
Summary of the invention
The object of the invention is intended to solve at least one of above-mentioned technological deficiency.
For this reason, first purpose of the present invention is to provide a kind of localization method that is used for capacitance touch screen, and this method can solve object and touch the erroneous judgement of a plurality of icons to the touch point coordinate simultaneously, has improved the bearing accuracy to the touch point coordinate.
Second purpose of the present invention is to provide a kind of locating device that is used for capacitance touch screen.
The 3rd purpose of the present invention is to provide a kind of touch-control system.
For realizing above-mentioned purpose, the embodiment of first aspect present invention proposes a kind of localization method that is used for capacitance touch screen, comprises the steps:
Step S1: detect the mutual capacitance value variable quantity on the capacitance touch screen,
Step S2: judged whether that according to said mutual capacitance value variable quantity object closes on or touches said capacitance touch screen, when judgement has object to close on said capacitance touch screen, execution in step S3; When judgement has object to touch said capacitance touch screen; Execution in step S4, wherein
Step S3: close on said capacitance touch screen when judgement has object; Calculate the close region of said object on said capacitance touch screen; Icon in the said close region is carried out image to be amplified; Repeating said step S2 and step S3 has object to touch said capacitance touch screen, execution in step S4 until judgement;
Step S4: when judgement has object to touch said capacitance touch screen, calculate the touch coordinate of said object.
The localization method that is used for capacitance touch screen through the embodiment of the invention; Can discern the coordinate that closes on of the object that closes on touch-screen; And then corresponding icon is amplified in control; Therefore the embodiment of the invention has solved object and has touched the erroneous judgement problem of a plurality of icons to the touch point coordinate simultaneously, has improved the bearing accuracy to the touch point coordinate.
The embodiment of second aspect present invention has proposed a kind of locating device that is used for capacitance touch screen; Comprise: detection module; Said detection module is used to detect the mutual capacitance value variable quantity on the capacitance touch screen, judge module, and said judge module links to each other with said detection module; Said judge module receives the detected said mutual capacitance value variable quantity of said detection module, and has judged whether that according to said mutual capacitance value variable quantity object closes on or touches said capacitance touch screen; Computing module, said computing module links to each other with said judge module with said detection module, and said computing module calculates the close region and/or the touch coordinate of said object; Control module; Said control module links to each other with said computing module with said judge module; When said judge module judgement has object to close on said capacitance touch screen; Said computing module is sent to said control module with said close region, and said control module is carried out image to the icon in the said close region and amplified.
The locating device that is used for capacitance touch screen according to the embodiment of the invention; Can discern the coordinate that closes on of the object that closes on touch-screen; And then the corresponding icon of control amplification, solved object and touched of the erroneous judgement of a plurality of icons simultaneously the touch point coordinate, improved bearing accuracy to the touch point coordinate.
The embodiment of third aspect present invention has proposed a kind of touch-control system, and said touch-control system comprises the locating device that is used for capacitance touch screen that touch-screen and second aspect present invention embodiment provide.
Touch-control system according to the embodiment of the invention; Can discern the coordinate that closes on of the object that closes on touch-screen through locating device; And then the corresponding icon of control amplification, solved object and touched of the erroneous judgement of a plurality of icons simultaneously the touch point coordinate, improved bearing accuracy to the touch point coordinate.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously with easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the process flow diagram according to the localization method that is used for capacitance touch screen of the embodiment of the invention;
The synoptic diagram that the mutual capacitance value changed when Fig. 2 closed on capacitance plate and touches capacitance plate for object;
Fig. 3 (a) closes on the synoptic diagram of capacitance plate for object;
Fig. 3 (b) touches the synoptic diagram of capacitance plate for object;
Fig. 4 is for changing the process flow diagram that object is positioned according to the mutual capacitance value; With
Fig. 5 is the synoptic diagram according to the locating device that is used for capacitance touch screen of the embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
Referring to figs. 1 to Fig. 4 the localization method that is used for capacitance touch screen according to the embodiment of the invention is described below.Wherein, said capacitance touch screen can be applied to multiple treatment facility, for example mobile phone, panel computer, keyboard, PDAs (Personal Digital Assistant System, personal digital assistant system) etc.
As shown in Figure 1, the localization method that is used for capacitance touch screen according to the embodiment of the invention comprises the steps:
S1: detect the mutual capacitance value variable quantity on the capacitance touch screen.
Object (for example finger) closes on or during the hand capacity touch-screen, and the mutual capacitance value of the adjacent domain of contact point and the contact point of object on capacitance touch screen will change.
Detect the mutual capacitance value variable quantity on the capacitance touch screen, said mutual capacitance value variable quantity is converted into digital signal and is sent to host computer.For example, host computer can be personal computer (Personal Computer), perhaps CPU (Central Processing Unit, central processing unit), DSP control devices such as (Digital Signal Processor, digital signal processors).
S2: judged whether that according to mutual capacitance value variable quantity object closes on capacitance touch screen or touches capacitance touch screen.
Host computer has judged whether that according to the digital signal of the sign mutual capacitance value variable quantity that receives object closes on capacitance touch screen or touches capacitance touch screen.
Particularly, host computer parses mutual capacitance value variable quantity according to the digital signal that receives.As shown in Figure 2, when host computer judged that mutual capacitance value variable quantity is between the first capacitance threshold value C1 and the second capacitance threshold value C2, judging had object to close on capacitance touch screen, shown in Fig. 3 (a).In one embodiment of the invention, the host computer setting closes on function APPRO [i], when mutual capacitance value variable quantity meets when closing on function APPRO [i], can judge that then mutual capacitance value variable quantity is between the first capacitance threshold value C1 and the second capacitance threshold value C2.When object A closes on said capacitance touch screen, execution in step S2.
Judge the process that has object to close on capacitance touch screen for clearer explanation, provide the function text description of closing on function APPRO [i] below.
If the threshold value of the capacitance change when touching is FTHD [i], hysteresis is hys, when capacitance change during greater than FTHD [i] hys and less than FTHD [i]+hys, has explained that object closes on capacitance touch screen.Wherein, FTHD [i] hys is the first capacitance threshold value C1, and FTHD [i]+hys is the second capacitance threshold value C2.
When host computer was judged mutual capacitance value variable quantity more than or equal to the second capacitance threshold value C2, then the section of declaring had object to touch capacitance touch screen, shown in Fig. 3 (b).In one embodiment of the invention, host computer is provided with and touches function T OUCH [j], when mutual capacitance value variable quantity meets touch function T OUCH [j], can judge that then mutual capacitance value variable quantity is more than or equal to the second capacitance threshold value C2.When object A touches said capacitance touch screen, execution in step S3.
Judge the process that has object to touch capacitance touch screen for clearer explanation, provide the function text description that touches function T OUCH [j] below.
If the capacitance change threshold value when touching is FTHD [i], FTHD [i] represents capacitance change.Hysteresis is hys, when capacitance change during more than or equal to FTHD [i]+hys, has explained that object touches capacitance touch screen.Wherein, FTHD [i]+hys is the second capacitance threshold value C2.
In one embodiment of the invention, the first capacitance threshold value C1, the second capacitance threshold value C2, close on function APPRO [i] and touch function T OUCH [j] by the host computer setting.
In one embodiment of the invention, when mutual capacitance value variable quantity during less than the first capacitance threshold value C1, host computer is not carried out action.
S3: the close region of computing object on capacitance touch screen, carry out image to the icon in the said close region and amplify.
As shown in Figure 4, when having object, judgement closes on capacitance touch screen, execution in step S31 at first, the close region of computing object on capacitance touch screen.
In one embodiment of the invention, the close region of computing object on capacitance touch screen comprises the steps:
When judgement has object to close on capacitance touch screen, computing object close on coordinate.Particularly; In one embodiment of the invention, the mode that computing object is closed on coordinate is basic identical with the mode of computing object touch coordinate at present, and different is to close on coordinate for computing object; The sensitivity of touch-screen is higher, and promptly the first capacitance threshold value C1 is less than the second capacitance threshold value C2.
According to the said close region of the said object of coordinate Calculation on said capacitance touch screen that close on.In an example of the present invention, close region is with the said zone of closing in the predetermined radii that coordinate is the center of circle.Wherein, predetermined radii can pass through the host computer setting.
Execution in step S32 then, host computer carry out according to detected close region and close on operation.In one embodiment of the invention, host computer is carried out to close on to operate and is comprised that the icon in the said close region is carried out image to be amplified.Amplify through the icon in the close region being carried out image, avoid, improved bearing accuracy the coordinate of the contact point of object and capacitance touch screen owing to object is run into the erroneous judgement problem that a plurality of icons cause simultaneously.Repeated execution of steps S2 and step S3 touch capacitance touch screen until judging by object.In other words, before judgment object touch capacitance touch screen, constantly the icon to close region carries out the image amplification, and the icon of progressively rejecting interference is with the actual icon that will touch of acquisition object, thereby the touch point position of object can more easily be obtained.
S4: when judgement has object to touch said capacitance touch screen, the touch coordinate of computing object.
As shown in Figure 4, when judgement has object to touch capacitance touch screen, execution in step S41, the touch coordinate of computing object on capacitance touch screen, thus realize object corresponding touch coordinate on capacitance touch screen is located.
Obtaining object behind touch coordinate corresponding on the capacitance touch screen, said touch coordinate is sent to the controller that links to each other with capacitance touch screen, and, carries out the control action of the corresponding object appointment of said touch coordinate by controller execution in step S42.In other words, controller detects the icon corresponding with said touch coordinate, and owing to the icon on the capacitance touch screen moves corresponding to Different control, thereby the control action of object appointment can known and carry out to controller.For example:, then show corresponding picture when controller detects by the icon of said touch coordinate location correspondingly with picture display function constantly.
The localization method that is used for capacitance touch screen according to the embodiment of the invention; Can discern the coordinate that closes on of the object that closes on touch-screen; And then the corresponding icon of control amplification, solved object and touched of the erroneous judgement of a plurality of icons simultaneously the touch point coordinate, improved bearing accuracy to the touch point coordinate.
The locating device of describing according to the embodiment of the invention with reference to figure 5 below that is used for capacitance touch screen 500.
As shown in Figure 5, comprise detection module 510, judge module 520, computing module 530 and control module 540 according to the locating device that is used for capacitance touch screen 500 of the embodiment of the invention.Wherein, judge module 520 links to each other with detection module 510, and computing module 530 links to each other with judge module 520 with detection module 510 respectively, and control module 540 links to each other with computing module 530 with judge module 520 respectively.
The said locating device 500 that is used for capacitance touch screen can be host computer.For example, host computer can be personal computer (Personal Computer), perhaps CPU (Central Processing Unit, central processing unit), DSP control devices such as (Digital Signal Processor, digital signal processors).
The mutual capacitance value variable quantity that detection module 510 detects on the capacitance touch screen is converted into said mutual capacitance value variable quantity digital signal and is sent to judge module 520.
Particularly, judge module 520 parses mutual capacitance value variable quantity according to the digital signal that receives.Shown in Fig. 2 and Fig. 3 (a), when judge module 520 judged that mutual capacitance value variable quantity is between the first capacitance threshold value C1 and the second capacitance threshold value C2, judging had object to close on capacitance touch screen, and closed on the judgement signal to computing module 530 transmissions.In one embodiment of the invention, judge module 520 setting is closed on function APPRO [i], when mutual capacitance value variable quantity meets when closing on function APPRO [i], can judge that then mutual capacitance value variable quantity is between the first capacitance threshold value C1 and the second capacitance threshold value C2.
Shown in Fig. 2 and Fig. 3 (b), when judge module 520 was judged mutual capacitance value variable quantity more than or equal to the second capacitance threshold value C2, then the section of declaring had object to touch capacitance touch screen, and refrigerator computing module 530 sends to touch judges signal.
In one embodiment of the invention, judge module 520 is provided with and touches function T OUCH [j], when mutual capacitance value variable quantity meets touch function T OUCH [j], can judge that then mutual capacitance value variable quantity is more than or equal to the second capacitance threshold value C2.
In one embodiment of the invention, the locating device that is used for capacitance touch screen 500 of the embodiment of the invention also comprises memory module 550, is used to preserve the first capacitance threshold value C1 and the second capacitance threshold value C2.Wherein, judge module 520 links to each other with memory module 550.
In one embodiment of the invention, when judge module 520 is judged mutual capacitance value variable quantity less than the first capacitance threshold value C1, do not carry out action.
As shown in Figure 4, judge have object to close on capacitance touch screen when judge module 520, said computing module 530 closes on judgement signal, the close region of computing object on capacitance touch screen according to what receive.
In one embodiment of the invention, the close region of computing module 530 computing object on capacitance touch screen comprises the steps:
Computing module 530 computing object close on coordinate; Particularly; In one embodiment of the invention, the mode that computing module 530 computing object are closed on coordinate is basic identical with the mode of computing object touch coordinate at present, and different is to close on coordinate for computing object; The sensitivity of touch-screen is higher, and promptly the first capacitance threshold value C1 is less than the second capacitance threshold value C2.
Computing module 530 is according to the said close region of the said object of coordinate Calculation on said capacitance touch screen that close on.In an example of the present invention, close region is with the said zone of closing in the predetermined radii that coordinate is the center of circle.Wherein, predetermined radii can pass through the host computer setting.
As shown in Figure 4, computing module 530 is judged the touch coordinate of calculated signals object on capacitance touch screen according to touching, thereby realizes object corresponding touch coordinate on capacitance touch screen is located.
Obtaining object behind touch coordinate corresponding on the capacitance touch screen, computing module 530 is sent to the controller that links to each other with capacitance touch screen with said touch coordinate, and carries out the control action of the corresponding object appointment of said touch coordinate by controller.In other words, controller detects the icon corresponding with said touch coordinate, and owing to the icon on the capacitance touch screen moves corresponding to Different control, thereby the control action of object appointment can known and carry out to controller.For example:, then show corresponding picture when controller detects by the icon of said touch coordinate location correspondingly with picture display function constantly.
The locating device that is used for capacitance touch screen according to the embodiment of the invention; Can discern the coordinate that closes on of the object that closes on touch-screen; And then the corresponding icon of control amplification, solved object and touched of the erroneous judgement of a plurality of icons simultaneously the touch point coordinate, improved bearing accuracy to the touch point coordinate.
The embodiment of the invention also provides a kind of touch-control system, comprises capacitance touch screen and locating device.Wherein, the locating device locating device that is used for capacitance touch screen that can provide for the above embodiment of the present invention.Can discern the coordinate that closes on of the object that closes on touch-screen through said locating device, and then control amplifies corresponding icon, solved object and touched of the erroneous judgement of a plurality of icons simultaneously, improved bearing accuracy the touch point coordinate to the touch point coordinate.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiment or example.
Although illustrated and described embodiments of the invention; For those of ordinary skill in the art; Be appreciated that under the situation that does not break away from principle of the present invention and spirit and can carry out multiple variation, modification, replacement and modification that scope of the present invention is accompanying claims and be equal to and limit to these embodiment.
Claims (7)
1. a localization method that is used for capacitance touch screen is characterized in that, comprises the steps:
Step S1: detect the mutual capacitance value variable quantity on the capacitance touch screen,
Step S2: judged whether that according to said mutual capacitance value variable quantity object closes on or touches said capacitance touch screen, when judgement has object to close on said capacitance touch screen, execution in step S3; When judgement has object to touch said capacitance touch screen; Execution in step S4, wherein
Step S3: close on said capacitance touch screen when judgement has object; Calculate the close region of said object on said capacitance touch screen; Icon in the said close region is carried out image to be amplified; Repeating said step S2 and step S3 has object to touch said capacitance touch screen, execution in step S4 until judgement;
Step S4: when judgement has object to touch said capacitance touch screen, calculate the touch coordinate of said object.
2. localization method as claimed in claim 1; It is characterized in that; When said mutual capacitance value variable quantity is between first capacitance threshold value and second capacitance threshold value; Then judging has object to close on said capacitance touch screen, and when said mutual capacitance value variable quantity during more than or equal to said second capacitance threshold value, then judging has object to touch said capacitance touch screen.
3. localization method as claimed in claim 1 is characterized in that, the close region of said computing object on said capacitance touch screen comprises the steps:
When judgement has object to close on said capacitance touch screen, calculate the coordinate that closes on of said object;
According to the said close region of the said object of coordinate Calculation on said capacitance touch screen that close on, said close region is with the said zone of closing in the predetermined radii that coordinate is the center of circle.
4. a locating device that is used for capacitance touch screen is characterized in that, comprising:
Detection module, said detection module are used to detect the mutual capacitance value variable quantity on the capacitance touch screen;
Judge module, said judge module links to each other with said detection module, and said judge module receives the detected said mutual capacitance value variable quantity of said detection module, and has judged whether that according to said mutual capacitance value variable quantity object closes on or touches said capacitance touch screen;
Computing module, said computing module links to each other with said judge module with said detection module, and said computing module calculates the close region and/or the touch coordinate of said object; With
Control module; Said control module links to each other with said computing module with said judge module; When said judge module judgement has object to close on said capacitance touch screen; Said computing module is sent to said control module with said close region, and said control module is carried out image to the icon in the said close region and amplified.
5. locating device as claimed in claim 4 is characterized in that, also comprises:
Memory module; Said memory module is preserved first capacitance threshold value and second capacitance threshold value; Said judge module links to each other with said memory module, and when said mutual capacitance value variable quantity was between first capacitance threshold value and second capacitance threshold value, then said judge module is judged had object to close on said capacitance touch screen; When detecting said mutual capacitance value variable quantity more than or equal to said second capacitance threshold value, then said judge module is judged has object to touch said capacitance touch screen.
6. locating device as claimed in claim 4 is characterized in that, the said locating device that is used for capacitance touch screen is a host computer.
7. a touch-control system is characterized in that, comprising:
Touch-screen; With
According to each described locating device that is used for capacitance touch screen among the claim 4-6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101609244A CN102830862A (en) | 2011-06-15 | 2011-06-15 | Positioning method used for capacitive touch screen, positioning device, and touch system |
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| CN2011101609244A CN102830862A (en) | 2011-06-15 | 2011-06-15 | Positioning method used for capacitive touch screen, positioning device, and touch system |
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Application publication date: 20121219 |