CN101561731B - Capacitance touch control device and control method thereof - Google Patents
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- CN101561731B CN101561731B CN200810091068XA CN200810091068A CN101561731B CN 101561731 B CN101561731 B CN 101561731B CN 200810091068X A CN200810091068X A CN 200810091068XA CN 200810091068 A CN200810091068 A CN 200810091068A CN 101561731 B CN101561731 B CN 101561731B
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Abstract
The invention relates to a capacitance touch control device and a control method thereof. The capacitance touch control device comprises a large size touch control panel, at least one integrated circuit and one second integrated circuit, wherein at least one integrated circuit scans the touch control panel, and the second integrated circuit not only has the functions of integral running control, data receiving, final calculation and external communication, but also can participate in the work of scanning. Besides, at least one first integrated circuit also can partially participate in calculation. The capacitance touch control device has the function of multi-finger touch control, and also can effectively improve the speed of image acquisition.
Description
Technical field
The present invention is relevant a kind of capacitive touch device, particularly about two above array capacitor formulas of a kind of use (projected capacitance) touch-control integrated circuit (Integrated Circuit; IC) capacitive touch device and the control method thereof of scanning large touch panel.
Background technology
On tradition is used, large size capacitive touch-control screen all uses surface capacitance type (surfacecapacitive) detection technology, but the surface capacitance type detection technology is to utilize the one group of electric current difference that flows to each end points of screen to differentiate the position of finger, therefore when the finger number of touching contact panel be that two fingers are when above, repayment set of currents number still is one group, so only can distinguish one group of absolute coordinates position, for example when two-dimensional matrix, only can repay one group of X, Y parameter, thereby can't reach the function that refers to touch-control more.
(All Points Addressable can be located in all contacts; APA) though type array capacitor formula detection technology can reach the function that refers to touch-control more, but it need put the action that sensor (Point Sensor) discharges and recharges to each, contact panel with matrix shape, when the line of induction (trace) of X-axis and Y-axis increases, the number of pixels of APA type array capacitor formula will sharply increase, thereby cause capture speed (frame rate) to descend, so be not suitable for the application of large touch panel.
Another kind of shaft staggered (Axis Intersect; AI) type array capacitor formula detection technology can reach the function that refers to touch-control too.Fig. 1 shows that tradition is applied in the AI type array capacitor formula detection technology of small size contact panel, it comprises a small size contact panel 10 and AI type array capacitor formula touch-control IC12 scanning contact panel 10, the AI type array capacitor formula touch-control IC12 that can support to scan 22 lines of induction with a maximum is an example, though capture speed is well when the small size contact panel 10 of 10 line of induction TRX1～TRX10 and TRY1～TRY10 is respectively arranged to be applied in X-axis and Y-axis, but if AI type array capacitor formula touch-control IC12 will be applied to X-axis and Y-axis the large touch panel 14 of 40 line of induction TRX1～TRX40 and TRY1～TRY40 is respectively arranged the time, as shown in Figure 2, then must increase total line of induction quantity that AI type array capacitor formula touch-control IC12 can scan, yet, it is very big that touch-control IC12 accounts for the ratio of the capture speed that whole contact panel uses to the time that capacitor charge and discharge spent at every turn, that is to say that the capture speed issue is mainly determined capacitor charge and discharge by each frame of IC12 (frame), so be applied to large touch panel 14 and will have a very large shortcoming to increase the method to scan line of induction number, be exactly that capture speed on the overall applicability will seriously descend, and then influence the usefulness of application end.
Therefore, a kind ofly being applied to large size panel and having the method for sensing that refers to touch controllable function and good capture speed more, is to be the institute Ji.
Summary of the invention
One of purpose of the present invention is to propose a kind of capacitive touch device and control method thereof of using two above array capacitor formula touch-control IC scanning large touch panels.
One of purpose of the present invention is to propose a kind ofly to be applied in large touch panel and to have capacitive touch device and the control method thereof that refers to touch controllable function and good capture speed more.
According to the present invention, a kind of capacitive touch device and control method thereof comprise a large-sized contact panel, at least one first capacitance touching control integrated circuit and one second capacitance touching control integrated circuit.Wherein this at least one first capacitance touching control integrated circuit mainly is responsible for this contact panel of scanning, and this at least one first capacitance touching control integrated circuit also can add partial arithmetic in wherein if necessary.This second capacitance touching control integrated circuit be mainly used in control this capacitive touch device overall operation, will carry out from the scan-data of this at least one first capacitance touching control integrated circuit last computing and and external communication, this second capacitance touching control integrated circuit also can participate in scanning work in addition.
This capacitive touch device has to refer to touch controllable function more, can also effectively improve capture speed.
Description of drawings
Fig. 1 shows that tradition is applied in the AI type array capacitor formula detection technology of small size contact panel;
Fig. 2 shows that tradition is applied in the AI type array capacitor formula detection technology of large touch panel;
Fig. 3 shows the first embodiment of the present invention;
Fig. 4 shows the second embodiment of the present invention;
Fig. 5 shows the third embodiment of the present invention;
Fig. 6 shows the fourth embodiment of the present invention;
Fig. 7 shows the fifth embodiment of the present invention;
Fig. 8 shows the sixth embodiment of the present invention; And
Fig. 9 shows the seventh embodiment of the present invention.
Drawing reference numeral:
10 contact panels
12 touch-control IC
14 contact panels
20 capacitive touch devices
22 contact panels
24 touch-control IC
26 touch-control IC
30 capacitive touch devices
32 contact panels
34 touch-control IC
36 touch-control IC
38 touch-control IC
40 capacitive touch devices
42 contact panels
44 touch-control IC
46 touch-control IC
48 touch-control IC
50 capacitive touch devices
52 contact panels
54 touch-control IC
56 touch-control IC
58 touch-control IC
60 touch-control IC
62 touch-control IC
70 capacitive touch devices
72 contact panels
74 touch-control IC
76 touch-control IC
78 touch-control IC
80 touch-control IC
82 touch-control IC
90 capacitive touch devices
92 contact panels
94 touch-control IC
96 touch-control IC
98 touch-control IC
100 touch-control IC
102 touch-control IC
110 capacitive touch devices
112 contact panels
114 touch-control IC
116 touch-control IC
118 touch-control IC
120 touch-control IC
122 touch-control IC
Embodiment
Fig. 3 shows the first embodiment of the present invention, capacitive touch device 20 comprises large touch panel 22 and two AI type array capacitor formula touch-control IC24 and 26, wherein contact panel 22 has m bar line of induction TR1～TRm, secondary touch-control IC24 begins scanning until line of induction TRn by line of induction TR1, main touch-control IC26 can begin to be scanned up to line of induction TRm by line of induction TRn or TRn+1, simultaneously same the line of induction is discharged and recharged avoiding; Certainly conversely, secondary touch-control IC24 can begin scanning until line of induction TR1 by line of induction TRn, this moment, main touch-control IC26 began to be scanned up to line of induction TRn or TRn+1 by line of induction TRm, main touch-control IC26 sends clock pulse CLK and gives secondary touch-control IC24 data with the secondary touch-control IC24 of synchronous extracting, the scan-data SDA that will obtain after secondary touch-control IC24 will scan sends main touch-control IC26 to, main touch-control IC26 will carry out last computing to judge the position of object on contact panel 22 from the scan-data SDA of secondary touch-control IC24 and the result of self scanning gained, main in addition touch-control IC26 is overall operation and responsible and the external communication of control capacitance formula contactor control device 20 also, and secondary touch-control IC24 also can add partial arithmetic in wherein to reduce the load of main touch-control IC26, for example, secondary touch-control IC24 can send the scan-data SDA after the computing to main touch-control IC26 afterwards more earlier with the advanced row operation of result of its scanning.Because touch-control IC24 and 26 can scan and each only responsible sweep test line of induction simultaneously, suppose m=40 and n=20, therefore as long as cost scans the time of 20 lines of induction just can be scanned the contact panel 22 with 40 lines of induction one time, so can effectively improve capture speed.
Fig. 4 shows the second embodiment of the present invention, in capacitive touch device 30, use three AI type array capacitor formula touch-control IC34,36 and 38 scan large touch panel 32, wherein contact panel 32 has m bar line of induction TR1～TRm, secondary touch-control IC34 begins scanning until line of induction TRk by line of induction TR1, secondary touch-control IC36 begins to be scanned up to line of induction TRn by line of induction TRk or TRk+1, main touch-control IC38 begins to be scanned up to line of induction TRm by line of induction TRn or TRn+1, main touch-control IC38 sends clock pulse CLK and gives secondary touch-control IC34 and 36, and utilize address (address) signal AD to select secondary touch-control IC34 and 36, the scan-data SDA that will obtain after secondary touch-control IC34 and 36 will scan sends main touch-control IC38 to, main touch-control IC38 will carry out last computing to judge the position of object on contact panel 32 from the scan-data SDA of secondary touch-control IC34 and 36 and the result of self scanning gained, main simultaneously touch-control IC38 also be responsible for control capacitance formula contactor control device 30 overall operation and and external communication, and secondary touch-control IC34 and 36 is except being responsible for scanning, also can add partial arithmetic in wherein to reduce the load of main touch-control IC38.Because touch-control IC34,36 and 38 can scan and each only responsible sweep test line of induction simultaneously, so can effectively improve capture speed.
Fig. 5 is the third embodiment of the present invention, capacitive touch device 40 comprises large touch panel 42 and three AI type array capacitor formula touch-control IC44,46 and 48, wherein contact panel 42 has m bar line of induction TR1～TRm, secondary touch-control IC44 begins scanning until line of induction TRn by line of induction TR1, secondary touch-control IC46 begins to be scanned up to line of induction TRm by line of induction TRn or TRn+1, main touch-control IC48 does not participate in scanning work, it is responsible for the control overall operation, receive data, carrying out last computing reaches and external communication, main touch-control IC48 sends clock pulse CLK and gives secondary touch-control IC44 and 46, and utilize address signal AD to select secondary touch-control IC44 and 46, the scan-data SDA that will obtain after secondary touch-control IC44 and 46 will scan sends main touch-control IC48 to, and main touch-control IC48 will carry out last computing from the scan-data SDA of secondary touch-control IC44 and 46 to judge the position of object on contact panel 42.Secondary touch-control IC44 and 46 also can add partial arithmetic in wherein to reduce the load of main touch-control IC48 except being responsible for scanning.Because secondary touch-control IC44 and 46 can scan and each only responsible sweep test line of induction simultaneously, so can effectively improve capture speed.In other embodiments, also can replace AI type array capacitor formula touch-control IC48 with other IC with calculation function.
Fig. 6 shows the fourth embodiment of the present invention, capacitive touch device 50 comprises large touch panel 52 and five AI type array capacitor formula touch-control IC54,56,58,60 and 62, wherein secondary touch-control IC54 and 56 lefts at contact panel 52, secondary touch-control IC54 is above secondary touch-control IC56, secondary touch-control IC58 and 60 is positioned at the below of contact panel 52, and secondary touch-control IC58 is at the left of secondary touch-control IC60.The X-axis of contact panel 52 and Y-axis respectively have 40 line of induction TRX1～TRX40 and TRY1～TRY40, secondary touch-control IC58 begins to be scanned up to line of induction TRX20 by line of induction TRX1, secondary touch-control IC60 begins to be scanned up to line of induction TRX40 by line of induction TRX20 or TRX21, secondary touch-control IC56 begins to be scanned up to line of induction TRY20 by line of induction TRY1, secondary touch-control IC54 begins to be scanned up to line of induction TRY40 by line of induction TRY20 or TRY21, main touch-control IC62 does not participate in scanning work, it is responsible for the control overall operation, receive data, carrying out last computing reaches and external communication, main touch-control IC62 sends clock pulse CLK and gives secondary touch-control IC54,56,58 and 60, and select secondary touch-control IC54 with address signal AD, 56,58 and 60, secondary touch-control IC54,56,58 and the 60 scan-data SDA that obtain after will scanning send main touch-control IC62 to, and main touch-control IC62 will be from secondary touch-control IC54,56,58 and 60 scan-data SDA carries out last computing to judge the position of object on contact panel 52.Secondary touch-control IC54,56,58 and 60 also can add partial arithmetic in wherein to reduce the load of main touch-control IC62 except being responsible for scanning.Because secondary touch-control IC54,56,58 and 60 can scan and each only responsible sweep test line of induction simultaneously, so can effectively improve capture speed.In other embodiments, also can replace AI type array capacitor formula touch-control IC62 with other IC with calculation function.
Fig. 7 shows the fifth embodiment of the present invention, capacitive touch device 70 comprises large touch panel 72 and five AI type array capacitor formula touch-control IC74,76,78,80 and 82, wherein secondary touch-control IC74 and 76 is positioned at the upper right side of contact panel 72, secondary touch-control IC74 is in the upper right side of secondary touch-control IC76, secondary touch-control IC78 and 80 is positioned at the lower left of contact panel 72, and secondary touch-control IC78 is in the upper right side of secondary touch-control IC80.The X-axis of contact panel 72 and Y-axis respectively have 40 line of induction TRX1～TRX40 and TRY1～TRY40, secondary touch-control IC78 scanning line of induction TRX1～TRX10 and TRY1～TRY10, secondary touch-control IC80 scanning line of induction TRX11～TRX20 and TRY11～TRY20, secondary touch-control IC74 scanning line of induction TRX21～TRX30 and TRY21～TRY30, secondary touch-control IC76 scanning line of induction TRX31～TRX40 and TRY31～TRY40, main touch-control IC82 does not participate in scanning work, it is responsible for the control overall operation, receive data, carrying out last computing reaches and external communication, main touch-control IC82 sends clock pulse CLK and gives secondary touch-control IC74,76,78 and 80, and select secondary touch-control IC74 with address signal AD, 76,78 and 80, secondary touch-control IC74,76,78 and the 80 scan-data SDA that obtain after will scanning send main touch-control IC82 to carry out last computing.Secondary touch-control IC74,76,78 and 80 also can add partial arithmetic in wherein to reduce the load of main touch-control IC82 except being responsible for scanning.Because secondary touch-control IC74,76,78 and 80 can scan and each only responsible sweep test line of induction simultaneously, so can effectively improve capture speed.In other embodiments, also can replace AI type array capacitor formula touch-control IC82 with other IC with calculation function.
Fig. 8 shows the sixth embodiment of the present invention, capacitive touch device 90 comprises large touch panel 92 and five AI type array capacitor formula touch-control IC94,96,98,100 and 102, wherein secondary touch-control IC94,96,98 and 100 all is positioned at the lower left of contact panel 92, secondary touch-control IC94 is in the upper right side of secondary touch-control IC96, secondary touch-control IC96 is in the upper right side of secondary touch-control IC98, and secondary touch-control IC98 is in the upper right side of secondary touch-control IC100.The X-axis of contact panel 92 and Y-axis respectively have 40 line of induction TRX1～TRX40 and TRY1～TRY40, secondary touch-control IC94 scanning line of induction TRX1～TRX10 and TRY1～TRY10, secondary touch-control IC96 scanning line of induction TRX11～TRX20 and TRY11～TRY20, secondary touch-control IC98 scanning line of induction TRX21～TRX30 and TRY21～TRY30, secondary touch-control IC100 scanning line of induction TRX31～TRX40 and TRY31～TRY40, main touch-control IC102 does not participate in scanning work, it is responsible for the control overall operation, receive data, carrying out last computing reaches and external communication, main touch-control IC102 sends clock pulse CLK and gives secondary touch-control IC94,96,98 and 100, and select secondary touch-control IC94 with address signal AD, 96,98 and 100, secondary touch-control IC94,96,98 and the 100 scan-data SDA that obtain after will scanning send main touch-control IC102 to carry out last computing.Secondary touch-control IC94,96,98 and 100 also can add partial arithmetic in wherein to reduce the load of main touch-control IC102 except being responsible for scanning.Because secondary touch-control IC94,96,98 and 100 can scan and each only responsible sweep test line of induction simultaneously, so can effectively improve capture speed.In other embodiments, also can replace AI type array capacitor formula touch-control IC102 with other IC with calculation function.
Fig. 9 shows the seventh embodiment of the present invention, capacitive touch device 110 comprises large touch panel 112 and five AI type array capacitor formula touch-control IC114,116,118,120 and 122, wherein secondary touch-control IC114 and 116 is positioned at the lower left of contact panel 112, secondary touch-control IC114 is in the lower left of secondary touch-control IC116, secondary touch-control IC118 and 120 is positioned at the lower right of contact panel 112, and secondary touch-control IC118 is on the upper left side of secondary touch-control IC120.The X-axis of contact panel 112 and Y-axis respectively have 40 line of induction TRX1～TRX40 and TRY1～TRY40, secondary touch-control IC116 scanning line of induction TRX1～TRX10 and TRY1～TRY10, secondary touch-control IC114 scanning line of induction TRX11～TRX20 and TRY11～TRY20, secondary touch-control IC120 scanning line of induction TRX21～TRX30 and TRY31～TRY40, secondary touch-control IC118 scanning line of induction TRX31～TRX40 and TRY21～TRY30, main touch-control IC122 does not participate in scanning work, it is responsible for the control overall operation, receive data, carrying out last computing reaches and external communication, main touch-control IC122 sends clock pulse CLK and gives secondary touch-control IC114,116,118 and 120, and select secondary touch-control IC114 with address signal AD, 116,118 and 120, secondary touch-control IC114,116,118 and the 120 scan-data SDA that obtain after will scanning send main touch-control IC122 to carry out last computing.Secondary touch-control IC114,116,118 and 120 also can add partial arithmetic in wherein to reduce the load of main touch-control IC122 except being responsible for scanning.Because secondary touch-control IC114,116,118 and 120 can scan and each only responsible sweep test line of induction simultaneously, so can effectively improve capture speed.In other embodiments, also can replace AI type array capacitor formula touch-control IC122 with other IC with calculation function.
Fig. 6 to Fig. 9 has shown four kinds of different layouts, the change of the position of putting along with secondary touch-control IC, track lengths between the line of induction and the secondary touch-control IC also will change, this will influence the usefulness of capacitive touch device, in addition, in Fig. 5 to Fig. 9, because master control IC48,62,82,102 and 112 and not responsible scanning panel, so not necessarily will use capacitance touching control IC, replace with general IC and also can.Moreover, in Fig. 3 to Fig. 9, also can replace AI type array capacitor formula touch-control IC with other array capacitor formula touch-controls IC, for example, APA type array capacitor formula touch-control IC.
Claims (20)
1. a capacitive touch device is characterized in that, described capacitive touch device comprises:
One contact panel has many lines of induction;
At least one first capacitance touching control integrated circuit; And
One second capacitance touching control integrated circuit, scan the described contact panel and described many lines of induction of each only responsible sweep test simultaneously with described at least one first capacitance touching control integrated circuit, the described second capacitance touching control integrated circuit receives scan-data from described at least one first capacitance touching control integrated circuit to carry out computing.
2. capacitive touch device as claimed in claim 1 is characterized in that, described at least one first capacitance touching control integrated circuit comprises shaft staggered type array capacitor formula touch-control integrated circuit.
3. capacitive touch device as claimed in claim 1 is characterized in that, described at least one first capacitance touching control integrated circuit carries out computing to produce described scan-data with the result of each self-scanning.
4. capacitive touch device as claimed in claim 1 is characterized in that, the described second capacitance touching control integrated circuit comprises shaft staggered type array capacitor formula touch-control integrated circuit.
5. capacitive touch device as claimed in claim 1 is characterized in that, the described second capacitance touching control integrated circuit is controlled the overall operation of described capacitive touch device.
6. capacitive touch device as claimed in claim 1 is characterized in that, the described second capacitance touching control integrated circuit is responsible for and external communication.
7. the control method of a capacitive touch device, described capacitive touch device comprise a contact panel with many lines of induction, it is characterized in that described control method comprises the following steps:
Scan the described contact panel and described many lines of induction of each only responsible sweep test simultaneously with at least one first capacitance touching control integrated circuit and one second capacitance touching control integrated circuit;
The scan-data that obtains behind described at least one first capacitance touching control IC scanning is sent to the described second capacitance touching control integrated circuit; And
Result by the described second described scan-data of capacitance touching control integrated circuit computing and self scanning is to judge the position of object on described contact panel.
8. control method as claimed in claim 7 is characterized in that, described method comprises that also the result by described at least one first each self-scanning of capacitance touching control integrated circuit computing produces described scan-data.
9. control method as claimed in claim 7 is characterized in that, described method also comprises via described second capacitance touching control integrated circuit and the external communication.
10. control method as claimed in claim 7 is characterized in that, described method also comprises utilizes the described second capacitance touching control integrated circuit to control the overall operation of described capacitive touch device.
11. a capacitive touch device is characterized in that, described capacitive touch device comprises:
One contact panel has many lines of induction;
A plurality of first capacitance touching control integrated circuit are in order to scan the described contact panel and described many lines of induction of each only responsible sweep test simultaneously; And
One second capacitance touching control integrated circuit receives a plurality of scan-datas from described a plurality of first capacitance touching control integrated circuit to carry out computing.
12. capacitive touch device as claimed in claim 11 is characterized in that, described a plurality of first capacitance touching control integrated circuit comprise shaft staggered type array capacitor formula touch-control integrated circuit.
13. capacitive touch device as claimed in claim 11 is characterized in that, described a plurality of first capacitance touching control integrated circuit carry out computing to produce described a plurality of scan-data with the result of each self-scanning.
14. capacitive touch device as claimed in claim 11 is characterized in that, the described second capacitance touching control integrated circuit comprises shaft staggered type array capacitor formula touch-control integrated circuit.
15. capacitive touch device as claimed in claim 11 is characterized in that, the described second capacitance touching control integrated circuit is controlled the overall operation of described capacitive touch device.
16. capacitive touch device as claimed in claim 11 is characterized in that, the described second capacitance touching control integrated circuit is responsible for and external communication.
17. the control method of a capacitive touch device, described capacitive touch device comprise a contact panel with many lines of induction, it is characterized in that described control method comprises the following steps:
Scan described contact panel and described many lines of induction of each only responsible sweep test simultaneously to produce a plurality of scan-datas with a plurality of first capacitance touching control integrated circuit;
Described a plurality of scan-datas are sent to one second capacitance touching control integrated circuit; And
By the position of the described a plurality of scan-datas of the described second capacitance touching control integrated circuit computing with judgement object on described contact panel.
18. control method as claimed in claim 17 is characterized in that, the step that produces described a plurality of scan-datas comprises that the result by described a plurality of first each self-scanning of capacitance touching control integrated circuit computing produces described a plurality of scan-data.
19. control method as claimed in claim 17 is characterized in that, described control method also comprises via described second capacitance touching control integrated circuit and the external communication.
20. control method as claimed in claim 17 is characterized in that, described control method also comprises utilizes the described second capacitance touching control integrated circuit to control the overall operation of described capacitive touch device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810091068XA CN101561731B (en) | 2008-04-16 | 2008-04-16 | Capacitance touch control device and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810091068XA CN101561731B (en) | 2008-04-16 | 2008-04-16 | Capacitance touch control device and control method thereof |
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| CN101561731A CN101561731A (en) | 2009-10-21 |
| CN101561731B true CN101561731B (en) | 2010-12-29 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101620481B (en) * | 2008-07-02 | 2012-07-04 | 盛群半导体股份有限公司 | Detecting system and method of touch panel |
| CN102109914B (en) * | 2009-12-25 | 2016-03-30 | 义隆电子股份有限公司 | For scanning passive type integrated circuit architecture and the control method thereof of contact panel |
| TWM475635U (en) * | 2013-09-10 | 2014-04-01 | Ite Tech Inc | Touch display device |
| KR102112092B1 (en) * | 2013-12-31 | 2020-05-19 | 엘지디스플레이 주식회사 | Touch sensing system |
| CN105353928A (en) * | 2015-09-28 | 2016-02-24 | 深圳贝特莱电子科技有限公司 | Large-sized touch screen based scanning method and system |
| CN112328121B (en) * | 2020-11-27 | 2024-05-28 | 北京集创北方科技股份有限公司 | Electronic device, method and electronic equipment |
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Commission number: 4W102452 Conclusion of examination: Claim No. 11-20 of patent No. 200810091068.X is invalid and the patent shall be maintained on the basis of claim 1-10. Decision date of declaring invalidation: 20140305 Decision number of declaring invalidation: 22202 Denomination of invention: Capacitance type touch-control device and control method thereof Granted publication date: 20101229 Patentee: ELAN MICROELECTRONICS CORP. |