CN1595436A - Method for reducing consumed power for capacitor type touch screen - Google Patents
Method for reducing consumed power for capacitor type touch screen Download PDFInfo
- Publication number
- CN1595436A CN1595436A CN 03158451 CN03158451A CN1595436A CN 1595436 A CN1595436 A CN 1595436A CN 03158451 CN03158451 CN 03158451 CN 03158451 A CN03158451 A CN 03158451A CN 1595436 A CN1595436 A CN 1595436A
- Authority
- CN
- China
- Prior art keywords
- touch screen
- time
- capacitive touch
- scanning
- digital circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 18
- 239000003990 capacitor Substances 0.000 title 1
- 239000011159 matrix material Substances 0.000 claims abstract description 8
- 230000003278 mimic effect Effects 0.000 claims description 21
- 238000004088 simulation Methods 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000737 periodic effect Effects 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000012905 input function Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Abstract
The invention relates to a condenser type touch screen, which is composed of many scanning lines matrix type configured on the panel connected to the analogy and digital circuit. The touch screen turns off the analogy circuit after scanning the many scanning lines within a scanning period to decrease the working current under the graphic or the hand-written input mode. The touch screen turns off the analogy circuit after scanning the many scanning lines corresponding to the push-button symbols of the panel within a scanning period to decrease the working current under the push-button input mode. The touch screen turns off the analogy and digital circuit after scanning the many scanning lines within a scanning period to decrease the working current under the periodic sleeping mode. Controlled by the program, the working current is decreased under various modes to reduce the power consumption of the touch screen.
Description
Technical field
The present invention relates to a kind of scan method of capacitive touch screen, particularly a kind of scan method that reduces consumed power for capacitive touch screen.
Background technology
Touch-screen is widely used on the electronic product.Touch-screen provides a kind of simple, light and cheap indicating device.Known touch-screen has three kinds of resistance-type, electromagnetic type and condenser types, and capacitive touch screen is used in public telephone or the guide system that for example can surf the Net, yet does not have a hand-write input function.Resistive touch screen is used in for example PDA(Personal Digital Assistant) or electronic dictionary, imports but can't be touched by finger.Present panel computer and e-schoolbag etc. dispose the touch-screen of integrating handwriting identification and button input function, are resistance-type or electromagnetical type touch screen.Resistive touch screen needs compression point to concentrate when operation, and electromagnetical type touch screen then needs to cooperate the input pen with battery to import.
With regard to performance and cost, capacitive touch screen obviously surmounts resistance-type and electromagnetical type touch screen.The principle of work of capacitive touch screen is the moment of utilizing finger or conductor to touch touch-screen to produce a capacity effect, thereby the variation by capacitance determines that finger or conductor touch the position of its panel, therefore capacitive touch screen needn't be by the input pen of electric consumption, and it is concentrated also needn't to exert pressure, so serviceable life is longer.Moreover the composition of capacitive touch screen is simple, element is few, the efficient height of product, and cost is lower when making a large amount of production.
Traditional capacitive touch screen comprises that panel has many sweep traces of matrix form configuration, and mimic channel and digital circuit connect these sweep traces.Because capacitive touch screen touches the position of its panel according to detecting the changes in capacitance amount to determine finger or conductor, therefore must consume certain power.Fig. 1 be known capacitive touch screen in scan operation working current to the oscillogram of time, in the one scan period T
aIn, capacitive touch screen is finished the scanner uni of all sweep traces and is differentiated the touched position of panel, simulation and digital circuit thereby consumption working current I
AllBecause multiple scanning period T constantly
aAction, the working current I that capacitive touch screen is average
AvglEqual I
AllApparently, if reduce working current, just can reduce the consumed power of capacitive touch screen.
Traditional capacitive touch screen generally is used to provide mouse function, also can be designed to writing input board, but never integrates functions such as keyboard and handwriting input.The applicant is in number No. 092205217 proposition " capacitive touch screen of integrating keys and handwriting functions " of Taiwan patent application case, multiple modes of operation such as button, handwriting input and mouse are provided, be printed with the corresponding various operator schemes of many patterns on the panel of this touch-screen, comprising the button pattern is simulation one keyboard under the button input pattern.The present invention is the further improvement of this integrated touch-screen, reduces its power consumption in programme controlled mode.
Summary of the invention
Fundamental purpose of the present invention is to propose a kind of method that reduces consumed power for capacitive touch screen.
According to the present invention, a kind of capacitive touch screen comprises that panel has many sweep traces of matrix form configuration, and mimic channel and digital circuit connect these sweep traces.This touch-screen is finished the scanning of all sweep traces in one scan in the very first time in the cycle under figure or handwriting input mode, and turn-off this mimic channel in second time subsequently.Under the button input pattern, this touch-screen only scans in these many sweep traces sweep trace to the key symbols on should panel in one scan in the very first time in the cycle, and turn-offs this mimic channel in second time subsequently.This touch-screen more comprises the one-period sleep pattern, finishes the scanning of all sweep traces in the very first time in the cycle in one scan, and turn-offs this simulation and digital circuit in second time subsequently.Under various operator schemes,, make the consumed power of capacitive touch screen reduce by reducing working current.
Description of drawings
For those of ordinary skills, from the following conjunction with figs. that is described in detail, the present invention can more clearly be understood, and its above-mentioned and other purpose and advantage will become more obvious, wherein:
Fig. 1 be known capacitive touch screen in scan operation working current to the oscillogram of time;
Fig. 2 is the system block diagrams of capacitive touch screen of the present invention;
Fig. 3 be capacitive touch screen of the present invention under figure or handwriting input mode working current to the oscillogram of time;
Fig. 4 be capacitive touch screen of the present invention under the button input pattern working current to the oscillogram of time; And
Fig. 5 be capacitive touch screen of the present invention under the cycle sleep pattern working current to the oscillogram of time.
Description of reference numerals
10 panels
12 key symbols
14 mimic channels
16 digital circuits
18 control circuits
20 software programs
Embodiment
The operator scheme of capacitive touch screen of the present invention comprises figure or handwriting input mode, button input pattern and cycle sleep pattern.Fig. 2 is the system block diagrams of capacitive touch screen of the present invention, it comprises panel 10, which is provided with a plurality of pattern symbols 12 of corresponding various buttons, sweep trace T0～T33 is distributed in the below of panel 10 with the configuration of matrix-style, and is connected to mimic channel 14 and digital circuit 16.The scan operation of digital circuit 16 gated sweep line T0～T33, mimic channel 14 induction panels 10 be by the electric quantity change of touching and causing, again by digital circuit 16 computings and differentiate the position that panel 10 is touched.Simulation and digital circuit 14 and 16 are controlled by control circuit 18, and its control program comprises the content from a software program 20.The hardware circuit of touch-screen can use arbitrary known circuits, in other words, needn't only utilize software program 20 to come gated sweep work by the modification of hardware circuit, just can reach the purpose that reduces consumed power.Software program 20 can be stored in the suitable storer of any kenel, for example flash memory and mask program read-only memory.Under various operator schemes, differentiate under the action not influencing scanner uni, optionally turn-off mimic channel 14 in the cycle reducing the elapsed time of its working current in one scan, thereby reduce the consumed power of capacitive touch screen.Further, at one scan sweep test sweep trace or optionally turn-off digital circuit 16 only in the cycle, more reduce average working current, thereby more reduce the consumed power of capacitive touch screen.
Fig. 3 be capacitive touch screen of the present invention under figure or handwriting input mode working current to the oscillogram of time, in the one scan period T
aIn, carry out the scanner uni of sweep trace T0～T33 and differentiate scan period T
aBe divided into time T
bAnd other remaining time T
c, in time T
bIn finish the scanning of all sweep trace T0～T33, therefore, in time T
bInterior working current is I
All, and in time T
cTurn-off mimic channel 14, working current is reduced to I
Digital, i.e. the working current of digital circuit 16.At each scan period T
aRepeat aforementioned activities, therefore average working current is
I
avg2＝((I
all-I
digital)×T
b/T
a)+I
digital (EQ-1)。
Fig. 4 be capacitive touch screen of the present invention under the button input pattern working current to the oscillogram of time.With reference to Fig. 2, at following sweep trace T1, T2, T6, T7, T11, T12, T15, T16, T20, T21, T25, T26, T30 and T31 that needs corresponding each key symbols 12 of scanning of this pattern, whether just can differentiate button 12 is touched, so promptly reduce the quantity of the sweep trace that is scanned, thereby shorten the T.T. of scanning.With reference to Fig. 4, because the minimizing of the line number of actual scanning, therefore at scan period T
aIn, in shorter time T
dIn just finish scanning work, at this moment between in working current be I
All, then in time T
eThe interior mimic channel 14 that turn-offs, working current is reduced to I
DigitalAt each scan period T
aRepeat aforementioned activities, therefore the average working current under the pattern of button input is
I
avg3＝((I
all-I
digital)×T
d/T
a)+I
digital (EQ-2)。
Comparison diagram 3 and Fig. 4 are because the number of scanning lines of button input pattern lacks the employed time T of the scanning work of button input pattern than the number of scanning lines of figure or handwriting input mode
dT sweep time than figure or handwriting input mode
bShort, therefore, according to mathematical expression EQ-1 and EQ-2, average working current I
Avg3Compare I
Avg2Little.
Fig. 5 be capacitive touch screen of the present invention under the cycle sleep pattern working current to the oscillogram of time, at this pattern sleep cycle T that gives a definition
fThan original scan period T
aLong, as the scan period under this pattern.At sleep cycle T
fIn, be T the sweep time of carrying out sweep trace
b, its working current is I
All, at later time T
hTurn-off simulation and digital circuit 14 and 16, working current is reduced to I
Sleep, be lower than the working current I of digital circuit 16
DigitalAt each sleep cycle T
fRepeat aforementioned activities, therefore the average working current under the cycle sleep pattern is
I
avg4＝((I
all-I
sleep)×T
b/T
f)+I
sleep (EQ-3)。
The cycle sleep pattern is to be applied in finger or conductor for some time not on panel, i.e. holding state, and, just convert corresponding pattern to and scan once again during contact surface plate 10 at finger or conductor.Therefore representative finger or conductor contact surface plate 10 continually not under the cycle sleep pattern increases to sleep cycle T with scan period of capacitive touch screen reality from the scan period Ta of figure or handwriting input or button input pattern
f, according to mathematical expression EQ-1, EQ-2 and EQ-3, average working current I
Avg4More than I
Avg2And I
Avg3Little.
Under above-mentioned various patterns by optionally turn-offing mimic channel and digital circuit to reduce the average working current of capacitive touch screen, thereby reduce its consumed power, under different patterns, more turn-off mimic channel and digital circuit by reducing number of scanning lines and selectivity, reduce average working current further and reduce consumed power, when for example being applied in mobile phone, the consumed power that reduces capacitive touch screen can make the power consumption of mobile phone reduce, and prolongs the service time of battery of mobile phone.Those of ordinary skills can design other various operator schemes easily from the instruction of the foregoing description, reduce the consumed power of capacitive touch screen.Because the present invention utilizes programme controlled principle to change the scanning work mode of capacitive touch screen, therefore both needn't change hardware circuit, can shorten design time again.On performance and cost, have advantage concurrently.
More than the narration done for preferred embodiment of the present invention be purpose for illustrating, and be not intended to limit the present invention the form that accurately discloses, based on above instruction or to make an amendment or change from embodiments of the invention study be possible, embodiment is for explaining orally principle of the present invention and allow those of ordinary skills utilize the present invention to select in practical application with various embodiment and narrate, and technological thought attempt of the present invention is decided by following claim and equalization thereof.
Claims (8)
1. method that reduces consumed power for capacitive touch screen, this capacitive touch screen comprises many sweep traces that panel has matrix form configuration and is connected to mimic channel and digital circuit, be operated under figure or the handwriting input mode, this method comprises the following steps:
The one scan cycle is divided into first and second time;
In this very first time, finish the scanning of these many sweep traces; And
In this second time, turn-off this mimic channel.
2. method that reduces consumed power for capacitive touch screen, this capacitive touch screen comprises many sweep traces that panel has matrix form configuration and is connected to mimic channel and digital circuit, this panel is provided with a part of sweep trace in the corresponding many sweep traces of the pattern symbol of representing button, this touch-screen is operated under the button input pattern, and this method comprises the following steps:
The one scan cycle is divided into first and second time;
In this very first time, finish the scanning of this part of scanning line; And
In this second time, turn-off this mimic channel.
3. one kind for capacitive touch screen reduces the method for consumed power, and this capacitive touch screen comprises many sweep traces that panel has the matrix form configuration and is connected to mimic channel and digital circuit, is operated under the cycle sleep pattern, and this method comprises the following steps:
Define a sleep cycle;
This sleep cycle is divided into first and second time;
In this very first time, finish the scanning of these many sweep traces; And
In this second time, turn-off this simulation and digital circuit.
4. method as claimed in claim 3, wherein this touch-screen has the one scan cycle, and this sleep cycle is selected greater than this scan period.
5. one kind for capacitive touch screen reduces the method for consumed power, and this capacitive touch screen comprises many sweep traces that panel has the matrix form configuration and is connected to mimic channel and digital circuit, and this method comprises the following steps:
The one scan cycle is divided into first and second time;
In this very first time, finish the scanning of these many sweep traces; And
In this second time, turn-off this mimic channel.
6. method as claimed in claim 5 more is included in and turn-offs this digital circuit in this second time.
7. one kind for capacitive touch screen reduces the method for consumed power, and this capacitive touch screen comprises many sweep traces that panel has the matrix form configuration and is connected to mimic channel and digital circuit, and this method comprises the following steps:
The one scan cycle is divided into first and second time;
A part of sweep trace in these many sweep traces of this very first time interscan; And
In this second time, turn-off this mimic channel.
8. method as claimed in claim 7 more is included in and turn-offs this digital circuit in this second time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031584519A CN100359453C (en) | 2003-09-10 | 2003-09-10 | Method for reducing consumed power for capacitor type touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031584519A CN100359453C (en) | 2003-09-10 | 2003-09-10 | Method for reducing consumed power for capacitor type touch screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1595436A true CN1595436A (en) | 2005-03-16 |
| CN100359453C CN100359453C (en) | 2008-01-02 |
Family
ID=34660469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031584519A Ceased CN100359453C (en) | 2003-09-10 | 2003-09-10 | Method for reducing consumed power for capacitor type touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100359453C (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1963736B (en) * | 2005-11-12 | 2010-05-05 | 智点科技（深圳）有限公司 | Digifax touch panel display |
| CN101017419B (en) * | 2005-06-30 | 2010-05-12 | 智点科技（深圳）有限公司 | Touch control panel display |
| CN1940842B (en) * | 2005-07-14 | 2010-05-12 | 智点科技（深圳）有限公司 | Planar display device with touch controllable function |
| CN101571782B (en) * | 2009-06-16 | 2011-01-19 | 友达光电股份有限公司 | Touch-control type panel and method for judging the generation position of touch-control signal |
| CN101950217A (en) * | 2010-09-30 | 2011-01-19 | 鸿富锦精密工业（深圳）有限公司 | Touch screen device and power-saving control method thereof |
| CN102081451A (en) * | 2010-12-29 | 2011-06-01 | 鸿富锦精密工业（深圳）有限公司 | Electronic device and power supply control method thereof |
| CN102103448A (en) * | 2011-02-24 | 2011-06-22 | 苏州瀚瑞微电子有限公司 | Capacitive touch knob and wiring method thereof |
| CN101866210B (en) * | 2009-04-16 | 2012-03-21 | 群康科技(深圳)有限公司 | Power saving device and method for capacitive touch pad and capacitive touch pad |
| CN102402353A (en) * | 2010-09-14 | 2012-04-04 | 上海天马微电子有限公司 | Touch scanning method of touch screen |
| CN103853406A (en) * | 2012-11-29 | 2014-06-11 | 瑞萨Sp驱动器公司 | Semiconductor device and electronic device |
| CN110347236A (en) * | 2019-07-15 | 2019-10-18 | 苏州国芯科技股份有限公司 | A kind of low-power consumption touch key-press controller |
| CN110753139A (en) * | 2019-09-25 | 2020-02-04 | 维沃移动通信有限公司 | Input method and mobile terminal |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0363720A (en) * | 1989-08-02 | 1991-03-19 | Casio Comput Co Ltd | Input display device |
| JP3642328B2 (en) * | 2001-12-05 | 2005-04-27 | セイコーエプソン株式会社 | Electro-optical device, driving circuit thereof, driving method, and electronic apparatus |
-
2003
- 2003-09-10 CN CNB031584519A patent/CN100359453C/en not_active Ceased
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017419B (en) * | 2005-06-30 | 2010-05-12 | 智点科技（深圳）有限公司 | Touch control panel display |
| CN1940842B (en) * | 2005-07-14 | 2010-05-12 | 智点科技（深圳）有限公司 | Planar display device with touch controllable function |
| CN1963736B (en) * | 2005-11-12 | 2010-05-05 | 智点科技（深圳）有限公司 | Digifax touch panel display |
| CN101866210B (en) * | 2009-04-16 | 2012-03-21 | 群康科技(深圳)有限公司 | Power saving device and method for capacitive touch pad and capacitive touch pad |
| CN101571782B (en) * | 2009-06-16 | 2011-01-19 | 友达光电股份有限公司 | Touch-control type panel and method for judging the generation position of touch-control signal |
| CN102402353A (en) * | 2010-09-14 | 2012-04-04 | 上海天马微电子有限公司 | Touch scanning method of touch screen |
| CN101950217A (en) * | 2010-09-30 | 2011-01-19 | 鸿富锦精密工业（深圳）有限公司 | Touch screen device and power-saving control method thereof |
| CN101950217B (en) * | 2010-09-30 | 2013-03-20 | 鸿富锦精密工业（深圳）有限公司 | Touch screen device and power-saving control method thereof |
| CN102081451A (en) * | 2010-12-29 | 2011-06-01 | 鸿富锦精密工业（深圳）有限公司 | Electronic device and power supply control method thereof |
| CN102081451B (en) * | 2010-12-29 | 2012-09-19 | 鸿富锦精密工业（深圳）有限公司 | Electronic device and power supply control method thereof |
| CN102103448A (en) * | 2011-02-24 | 2011-06-22 | 苏州瀚瑞微电子有限公司 | Capacitive touch knob and wiring method thereof |
| CN103853406A (en) * | 2012-11-29 | 2014-06-11 | 瑞萨Sp驱动器公司 | Semiconductor device and electronic device |
| CN103853406B (en) * | 2012-11-29 | 2018-09-14 | 辛纳普蒂克斯日本合同会社 | Semiconductor device and electronic equipment |
| CN110347236A (en) * | 2019-07-15 | 2019-10-18 | 苏州国芯科技股份有限公司 | A kind of low-power consumption touch key-press controller |
| CN110753139A (en) * | 2019-09-25 | 2020-02-04 | 维沃移动通信有限公司 | Input method and mobile terminal |
| CN110753139B (en) * | 2019-09-25 | 2021-02-26 | 维沃移动通信有限公司 | Input method and mobile terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100359453C (en) | 2008-01-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9189156B2 (en) | Keyboard comprising swipe-switches performing keyboard actions | |
| CN1110736C (en) | Adaptive sampling of touch screen input | |
| CN100359453C (en) | Method for reducing consumed power for capacitor type touch screen | |
| US20040071344A1 (en) | System and method for accepting disparate types of user input | |
| CN102035934A (en) | Dual-screen portable electronic equipment and management method | |
| CN1952860B (en) | Double bopomofo Chinese input law in mobile phone | |
| TWM240050U (en) | Capacitor touch panel with integrated keyboard and handwriting function | |
| CA2092904A1 (en) | Computer with tablet input to standard programs | |
| CN1991717A (en) | Virtual keyboard and hand-write synergic input system and realization method thereof | |
| TW200539031A (en) | A capacitor type touch pad with integrated graphic input function | |
| CN1538267A (en) | Electric capacity type touch control board combined with key and hand writing function | |
| TWI243576B (en) | Method for defining functions of keys of a keypad of an electronic device | |
| CN100405279C (en) | Capacity type contact control panel having integrated picture input function | |
| CN2655331Y (en) | Touch-controlling input device for electronic device | |
| CN2828916Y (en) | Hand writing board with virtual keyboard function | |
| CN2802573Y (en) | Induction touch keyboard with touch feedback function and its portable terminal | |
| CN2507203Y (en) | Mobile telephone set with full screen hand write input function | |
| CN100514861C (en) | Capacitor type touch screen having press key structure and detection method therefor | |
| CN1996217A (en) | Conversion input device based on handwriting input manner and method therefor | |
| CN200956148Y (en) | Word input method or keyboard lauguage configuration switching device | |
| CN1218212A (en) | Method and apparatus for operation by hand written alphabets and symbols | |
| CN1896926A (en) | Chinese character inputting method and device with hand gesture | |
| CN2685969Y (en) | Single-key inputting portable electronic device used in single-key operating system | |
| CN2676296Y (en) | Electronic apparatus | |
| TWI226019B (en) | Method of lowering power consumption of capacitive-type touch panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080102 |
|
| CX01 | Expiry of patent term | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20221115 Decision number of declaring invalidation: 59169 Granted publication date: 20080102 |
|
| IW01 | Full invalidation of patent right |