CN101876871B - Image display system and input position judging method - Google Patents
Image display system and input position judging method Download PDFInfo
- Publication number
- CN101876871B CN101876871B CN200910137278.2A CN200910137278A CN101876871B CN 101876871 B CN101876871 B CN 101876871B CN 200910137278 A CN200910137278 A CN 200910137278A CN 101876871 B CN101876871 B CN 101876871B
- Authority
- CN
- China
- Prior art keywords
- capacitor
- group
- switch
- module
- 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.)
- Active
Links
Landscapes
- Position Input By Displaying (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention relates to an image display system and an input position judging method. The image display system comprises a capacitance type touch-control panel; the touch-control panel comprises a plurality of capacitor banks, a processing circuit, a first scanning circuit and a second scanning circuit; each capacitor bank comprises a plurality of capacitor modules; the first scanning circuit scans each capacitor bank; and the second scanning circuit scans the capacitor modules of a specific capacitor bank. Thus the processing circuit generates an input signal relevant to a position of the touch-control panel.
Description
Technical field
The present invention relates to a kind of image display system; Specifically, image display system of the present invention contains contact panel, and utilizes two stage scan mode, produces the input signal relevant to position on contact panel.
Background technology
In known technology, seldom capacitive contact panel is set directly in screen or display device, be particularly used in slimming display device, such as LCD screen etc.Its reason is, known capacitance type touch-control panel has the problem of lack of resolution, in other words, if the too small object of contact area, the nib of pointer for example, capacitance type touch-control panel possibly cannot be differentiated.
In addition, when capacitance type touch-control panel is arranged in slimming display device, between contact panel and display device, can produce stray capacitance and noise, and have the problem that causes using Line To Line (line-by-line) scanning because of frequency limitation.
Summary of the invention
The object of the present invention is to provide a kind of image display system, it has the capacitance type touch-control panel in the display device of being arranged on, and utilize two stage mode to scan contact panel, first scan for scope larger on panel previous stage, and the latter half scans for scope less on panel again.
In one embodiment, image display system comprises a capacitance type touch-control panel, and contact panel comprises a plurality of capacitor groups, and each capacitor group comprises a plurality of capacitor modules.Contact panel comprise in addition treatment circuit, the first sweep circuit, with the second sweep circuit.Treatment circuit is the capacitor module of each capacitor group of electrically connect and each capacitor group optionally.The first sweep circuit and each capacitor group link, each capacitor group of sweep signal successively, therefore treatment circuit successively with each capacitor group conducting to measure the capacitance of each capacitor group, and according to measured capacitance, a particular comparator group in identification capacitor group.The capacitor module of the second sweep circuit and treatment circuit and particular comparator group links, the second sweep circuit scans the capacitor module of particular comparator group successively, therefore treatment circuit successively with each capacitor module conducting of particular comparator group to measure the capacitance of each capacitor pack module, and according to measured capacitance, at least one particular comparator module in identification particular comparator group, produces and input signal that on contact panel, a position is relevant thus.And optionally, particular comparator group is touched by user and the capacitance that causes treatment circuit to measure particular comparator group is greater than a predetermined value.
In an embodiment of the method, comprise: (a) conducting treatment circuit and each capacitor group successively, to measure the capacitance of each capacitor group; (b) capacitance measuring according to step (a), at least one particular comparator group in a plurality of capacitor groups of identification; (c) each capacitor module of conducting treatment circuit and particular comparator group successively, to measure the capacitance of each capacitor pack module; (d) capacitance measuring according to step (c), at least one particular comparator module of identification; And (e) according to the position of particular comparator module, an input position on judgement contact panel.
Accompanying drawing explanation
Fig. 1 shows display system according to an embodiment of the invention
Fig. 2 a shows contact panel circuit according to an embodiment of the invention;
Fig. 2 b shows the capacitor sensor of contact panel and the characteristic of capacitor parasitics according to an embodiment of the invention;
Fig. 2 c shows contact panel circuit according to an embodiment of the invention; And
Fig. 2 d shows contact panel circuit according to an embodiment of the invention.
Primary clustering symbol description
Display system 1 electronic installation 10
Display device 100 capacitance type touch-control panels 200
Capacitor group 202, EA-EG
Capacitor module 2022, EA1-EG3
The first sweep circuit 204 second sweep circuits 206
Treatment circuit 208 charge-discharge circuits 2082
Noise suppression circuit 2084 capacitor sensor Cs
Capacitor parasitics Cp sampling capacitor device Cx
Sweep trace L1-LN, S1-Sm, SWX object under test TOB
Transistor switch T1-TN, T11-TNm, TX, RT1-RTN, RT11-RTNm, RTX
Embodiment
The present invention discloses the capacitance type touch-control panel in a kind of display device that is applied to image display system, and specifically, contact panel utilizes respectively scan modes more than two stages to decide the input position of user on contact panel.In order to make narration of the present invention more detailed and complete, can and coordinate Fig. 1 to Fig. 2 d with reference to following description.
With reference to figure 1, Fig. 1 shows display system 1 according to an embodiment of the invention, described display system comprises have display device 100 electronic installation 10 of (for example liquid crystal indicator or OLED display device), particularly capacitance type touch-control panel 200 is installed in display device 100, display device 100 also comprises a power supply supply (not shown) for contact panel 200 runnings, and the image that user can watch display device 100 to provide by capacitance type touch-control panel 200.
In the present embodiment, the electronic installation 10 that has a display device 100 can be applicable to mobile phone, digital camera, personal digital assistant (PDA), mobile computer, desktop PC, TV, vehicle display, display, GPS (GPS) or portable digital videodisc (DVD) player for aviation.
Fig. 2 a shows the circuit of capacitance type touch-control panel 200 according to an embodiment of the invention.In the present embodiment, capacitance type touch-control panel 200 comprises a plurality of capacitor groups 202, the first sweep circuit 204, the second sweep circuit 206 and treatment circuit 208.Wherein, each capacitor group 202 also comprises a plurality of capacitor modules 2022, and each capacitor module 2022 comprises respectively a variable capacitor sensor Cs, and the electrode of variable capacitor sensor Cs can be embodied as transparency electrode, its material can be indium tin oxide (Indium Tin Oxide is called for short ITO).When capacitor module 2022, for example pointed or pointer when touching, the capacitance in capacitor sensor Cs changes.This part is that those skilled in the art know ground, repeats no more.
But it should be noted, between the common electrode PV of the electrode of capacitor module 2022 and display device 100 or the electrode of adjacent capacitor module 2022, have capacitor parasitics Cp, and capacitor parasitics Cp produces when contact panel 200 is made and is arranged at display device 100, wherein the capacitance of capacitor parasitics Cp is approximately fixed.Fig. 2 b shows the schematic diagram that is related to of the capacitance variation that area caused that touched by object under test TOB according to capacitor module 2022, and wherein X-axis means capacitance, and Y-axis means the area that capacitor module 2022 is touched.The area change being touched along with capacitor module 2022 increases, and the capacitance of its capacitor sensor Cs is also along with increase, and storable electric weight is also along with change.
Treatment circuit 208 comprises charge-discharge circuit 2082.2082 pairs of capacitor modules of charge-discharge circuit 2022 carry out charge and discharge.Whether it is worth mentioning that, aforesaid capacitor parasitics Cp also can impact capacitor sensor Cs, but as shown in Figure 2 b, the capacitance of capacitor parasitics Cp is approximately definite value, can be not touched and change along with capacitor module 2022.
Charge-discharge circuit 2082 will provide charging voltage V, in order to capacitor module 2022 is charged, and provide fixed current I to discharge to capacitor module 2022, and the time that charge-discharge circuit 2082 discharges and recharges is in addition certain value.And when treatment circuit 208 and capacitor module 2022 conducting, can measure at node A the equivalent voltage of capacitor module 2022, and when capacitor module 2022 is touched by object under test TOB, the variation of the capacitance of capacitor sensor Cs will affect the equivalent voltage of node A.
In another embodiment, treatment circuit 208 also comprises noise suppression circuit 2084, and noise suppression circuit 2084 mainly comprises a sampling capacitor device Cx, when capacitor module 2022 (or capacitor group 202) discharges with charge-discharge circuit 2082 conductings, be used for the electric weight that reservior capacitor module 2022 flows out, and measure thus capacitance or the capacitance variation of capacitor module 2022.As previously mentioned, capacitor module 2022 inevitably can contain capacitor parasitics Cp, and being common electrode PV with respect to display device 100, capacitor parasitics Cp forms, and when common electrode PV is during with noise, will make capacitor module 2022 and the electric weight that sampling capacitor device Cx stores all be subject to the impact of noise, and cannot measure exactly the capacitance of capacitor module 2022.Therefore, in the present embodiment, sampling capacitor device Cx one end and capacitor module 2022 link, and the sampling capacitor device Cx other end links with the common electrode PV of display device 100.As shown in the figure, sampling capacitor device Cx two ends all can be subject to the impact of common electrode PV simultaneously and mutually offset, therefore when common electrode PV is during with noise, sampling capacitor device Cx still can measure capacitance or the capacitance variation of capacitor module 2022 exactly.
Fig. 2 c shows according to the detailed circuit of the capacitance type touch-control panel 200 of one embodiment of the invention.Each capacitor group (for example EA) comprises a plurality of capacitor modules, for example three capacitor modules (EA1-EA3).In the present embodiment, each capacitor module comprises a transparency electrode, and width is between 0.1mm-0.5mm, and transparency electrode is except elongate in shape, also can be arbitrary shape.
Contact panel 200 adopts two stage scannings.First stage scanning is for capacitor group EA-EG, and subordinate phase is for the capacitor module in particular comparator group wherein.To further illustrate as follows.
first stage scanning
With reference to figure 2c, the first sweep circuit 204 provides many span scan lines (L1-L7), link respectively capacitor group (EA-EG), and the number of capacitor group is corresponding to the number of the first sweep circuit 204 sweep traces.The signal that scans of the first sweep circuit 204 is issued capacitor group EA, capacitor group EB successively, until capacitor group EG.When receive the first sweep circuit 204 scan signal time, capacitor group EA-EG successively with treatment circuit 208 conductings.In this embodiment, alleged capacitor group and treatment circuit 208 conductings, refer to capacitor module in this capacitor group together with treatment circuit 208 conductings.And treatment circuit 208 can, according to the whole stored electric weight of capacitor module in capacitor group, measure the capacitance of capacitor group.
As shown in Figure 2 c, when object under test TOB touches capacitor group EC, ED and EE, the capacitance of its capacitor module can change, for example be greater than a predetermined value, and then processed circuit 208 is detected in previously described mode, 208 for the treatment of circuits record capacitor group EC, ED and EE is " particular comparator group ", to carry out scanning of next stage.In another embodiment, except being detected " the particular comparator group " that capacitance changes, the last capacitor group for the treatment of circuit 208 additional records " particular comparator group " (EC, ED and EE) (capacitor group EB) and a rear capacitor group (capacitor group EF), to carry out scanning of next stage.
subordinate phase scanning
Capacitor module number in corresponding each capacitor group, the second sweep circuit 206 provides three Reginal-block scanning lines (S1-S3), and it is connected with the capacitor module (EA1-EG3) in capacitor group (EA-EG) respectively successively.The capacitor group EA of take is example, Reginal-block scanning line S1 connects capacitor module EA1, Reginal-block scanning line S2 connects capacitor module EA2, Reginal-block scanning line S3 connects capacitor module EA3, and according to above-mentioned connected mode, Reginal-block scanning line S1-S3 is connected to the capacitor module (EB1-EG3) in capacitor group (EB-EG) successively.
In " subordinate phase scanning ", the second sweep circuit 206 can't scan all capacitor modules (EA1-EG3), relatively, the second sweep circuit 206 only sends and scans signal and give in the last stage and scan particular comparator group EC, ED that middle treatment circuit 208 records and the capacitor module of EE, or the capacitor module of capacitor group EB and EF before and after adding.When receive the second sweep circuit 206 scan signal time, the capacitor module of above-mentioned capacitor group and treatment circuit 208 conductings, and treatment circuit 208 can, according to the stored electric weight of capacitance module (EB1-EF3), measure its capacitance.As shown in Figure 2 c, and when object under test TOB touches capacitor module EC2, EC3, ED1, ED2, ED3, EE1 and EE2, its capacitance can change, for example be greater than a predetermined value, and then processed circuit 208 detects, 208 for the treatment of circuits record capacitor module EC2, EC3, ED1, ED2, ED3, EE1 and EE2 for " particular comparator module ", determine thus position touched on contact panel 200, to produce an input signal.
In one embodiment, can calculate the mean place of capacitor module EC2, EC3, ED1, ED2, ED3, EE1 and EE2, or further select two at a distance of capacitor module (being capacitor module EC2 and capacitor module EE2) farthest from capacitor module EC2, EC3, ED1, ED2, ED3, EE1 and EE2, the central point O that calculates again two capacitor module EC2 and EE2, determines position touched on contact panel 200 thus.
From above-described embodiment, can also recognize, panel 200 can allow at least two, and capacitor module is touched or two capacitor groups are touched, take Fig. 2 c as example, and capacitor group EC has touched capacitor module EC2 and EC3, capacitor group ED have touched capacitor module ED1-ED3, capacitor group EE has touched capacitor module EE1 and EE2.Yet, to be familiar with this technical field person and should to recognize, above-described embodiment is for exemplary illustration, but not is used for limiting capacitor group touched in the present invention or the number of capacitor module; Be that more than one capacitor module is touched, or in two capacitor groups (can be adjacent or non-conterminous), all there is the embodiment of touched capacitor module, all in the scope that the present invention wanted to contain.
It should be noted that, in other embodiments, the first sweep circuit 204 and the second sweep circuit 206 can be integrated in the signal/control circuit (not showing on figure) in display device 100, and save contact panel 200 pin (Pin) number because needing span scan line (L1-L7) and Reginal-block scanning line (S1-S3) to increase originally, for example span scan line (L1-L7) can directly utilize the pin of original signal/control in display device 100 with Reginal-block scanning line (S1-S3), and does not need additionally to increase pin so that scanning to be provided again.
In addition, with reference to figure 2d, in the present embodiment, capacitance type touch-control panel 200 is provided with change-over switch unit, comprise a plurality of change-over switch TX, each change-over switch TX is controlled by a switched scan line SWX respectively, and a respectively corresponding capacitor module, this can make signal/control signal (for example extra sweep signal) by change-over switch TX, the capacitor group that scanning is arranged along directions X (or Y-direction).This by the mode that directions X and Y-direction are scanned respectively, can obtain judged result more accurately.
Below further illustrate the embodiment of Fig. 2 d.The capacitor module EA1 to ENm of the corresponding capacitor group in change-over switch unit (EA-EN), described capacitor module EA1 to ENm is respectively arranged with transistor switch TX and RTX.Transistor switch TX and RTX are anti-phase, and for example transistor switch TX is N-shaped transistor, and transistor switch RTX is p-type transistor.Transistor switch TX is relevant to RTX and directions X, and is subject to the control of directions X sweep trace SWX.In this embodiment, capacitor group (EA-EN) is all arranged along directions X, therefore when receive directions X sweep trace SWX scan signal time, switch TX all in capacitor group (EA-EN) open, and all switch RTX close.
The capacitor group EA of take is example, and the first sweep circuit 204 is provided with a plurality of transistor switch T1 and RT1, and each transistor switch T1 distinguishes the capacitor module EA1-EAm in corresponding capacitor group EA with RT1, and controlled by span scan line L1.The second sweep circuit 206 comprises a plurality of transistor switch T11-T1m and RT11-RT1m, wherein, the respectively corresponding capacitor module EA1-EAm of transistor switch T11-T1m arranges, transistor switch RT11-RT1m also distinguishes corresponding capacitor module EA1-EAm and arranges, and transistor switch T11 and RT11 are controlled by Reginal-block scanning line S 1, transistor switch T1m and RT1m are controlled by Reginal-block scanning line Sm.In addition, transistor switch T1 and RT1 are anti-phase, and for example transistor switch T1 is N-shaped transistor, and transistor switch RT1 is p-type transistor; Transistor switch T11-T1m and RT11-RT1m are anti-phase, and for example transistor switch T11-T1m is N-shaped transistor, and transistor switch RT11-RT1m is p-type transistor.Take capacitor module EA1 as example, transistor switch T1 and T11 connect with transistor switch TX, therefore as transistor switch T1, T11, and TX while all opening, capacitor module EA1 just can with treatment circuit 208 conductings, and transistor switch RT1, RT11, be connected in parallel to each other with RTX, and work as long as one of them unlatching, capacitor module EA1 ground connection.Other capacitor module can reference capacitor module EA1, in the mode of icon, arranges, and not in this to go forth.
While scanning in the first stage, all switch TX and T11-TNm open, and all switch RTX and RT11-RTNm close.The span scan line L1-Ln of the first sweep circuit 204 now, turn-on transistor switch T1-TN successively, with conducting treatment circuit 208 and capacitor group (EA-EN), and treatment circuit 208 measures the capacitance of capacitor group (EA-EN), and in this example, treatment circuit 208, according to measured capacitance or capacitance variation, judges that the capacitance of capacitor group EA is greater than a predetermined value, therefore further select capacitor group EA, to carry out scanning of next stage.
Subordinate phase scanning is only for capacitor group EA, and wherein all switch TX and the T1 of capacitor group EA open, and all switch RTX and RT1 close.The Reginal-block scanning line S1-Sm of the second sweep circuit 206 now, open successively transistor switch T11-T1m in capacitor group EA, conducting treatment circuit 208 and capacitor module EA1 to EAm, and treatment circuit 208 measures capacitance or the capacitance variation of capacitor module EA1 to EAm, selected capacitor module EA1 to EAm at least one of them, and produce input signal.
According to above setting, the embodiment of the present invention provides a kind of capacitance type touch-control panel being incorporated in display device, it has advantages of with respect to electric resistance touch-control panel, for example, according to the embodiment of the present invention, can not increase the thickness of display device, solve the problem of stray capacitance and noise, in addition yet, by two stage scanning, also solved the problem of known capacitance formula contact panel lack of resolution.
The foregoing is only preferred embodiment of the present invention, not in order to limit claim of the present invention; All other do not depart from the equivalence completing under disclosed spirit and changes or modify, and all should be included in following claim.
Claims (12)
1. an image display system, comprises a capacitance type touch-control panel, and described contact panel comprises:
A plurality of capacitor groups, each capacitor group also comprises a plurality of capacitor modules;
One treatment circuit, the optionally capacitor module of each capacitor group of electrically connect and each capacitor group;
One first sweep circuit, link with each capacitor group, scan successively each capacitor group, therefore described treatment circuit successively with each capacitor group conducting to measure the capacitance of each capacitor group, and according to measured capacitance, at least one particular comparator group in a plurality of capacitor groups described in identification; And
One second sweep circuit, link with the capacitor module of described treatment circuit and described particular comparator group, described the second sweep circuit scans the capacitor module of described particular comparator group successively, therefore described treatment circuit successively with each capacitor module conducting of described particular comparator group to measure the capacitance of each capacitor pack module, and according to measured capacitance, at least one particular comparator module in particular comparator group described in identification, to produce the input signal relevant to a position on described contact panel;
One display device, described display device comprises described contact panel and a power supply supply, wherein said display device has community electrode, described each capacitor module of common electrode electrically connect, and described treatment circuit also comprises a sampling capacitor device, described sampling capacitor device one end is each capacitor group of electrically connect and each capacitor module optionally, common electrode described in other end electrically connect.
2. system according to claim 1, wherein, the capacitance that described treatment circuit measures described particular comparator group is greater than a predetermined value.
3. system according to claim 1, wherein, described the first sweep circuit also links the capacitor module of each capacitor, and described the first sweep circuit comprises many first sweep traces;
Wherein, the capacitor module of different capacitors group links the first different sweep traces, and the capacitor module of same capacitor group links same the first sweep trace.
4. system according to claim 1, wherein, described the second sweep circuit comprises many second sweep traces, and in same capacitor group, different capacitors module links the second different sweep traces, and same the second sweep trace links the capacitor module of different capacitors group.
5. system according to claim 1, wherein, each capacitor module comprises an electrode, and corresponding each capacitor module, described the first sweep circuit comprises one first switch, and described the first switch links described electrode and described treatment circuit;
Wherein, when described the first sweep circuit scans, the first switch of the capacitor module in corresponding same capacitor group is together opened.
6. system according to claim 5, wherein, each capacitor module of corresponding described particular comparator group, described the second sweep circuit comprises a second switch, in order to link described electrode and described treatment circuit, and described second switch is connected with described the first switch;
Wherein, when described the second sweep circuit scans, the second switch of the capacitor module of corresponding described particular comparator group only has a unlatching at every turn.
7. system according to claim 6, wherein, each capacitor module of corresponding described particular comparator group, described the first sweep circuit comprises one the 3rd switch, and described the second sweep circuit also comprises one the 4th switch, described the 3rd switch and described the 4th switch in parallel, described the 3rd switch difference ground connection and the described electrode of link, described the 4th switch is ground connection and the described electrode of link respectively;
Wherein said the 3rd switch and described the first switch inverse, and described the 4th switch and described second switch are anti-phase.
8. system according to claim 7, wherein, described a plurality of capacitor groups are arranged along a predetermined direction;
Wherein, corresponding each capacitor module, described contact panel also comprises one the 5th switch, described the 5th switch links described electrode and described treatment circuit, described the 5th switch is connected with described the first switch and described second switch, the 5th switch of each capacitor module is relevant to described predetermined direction, and together opens or close;
Corresponding each capacitor module, described contact panel also comprises one the 6th switch, described the 6th switch and described the 3rd switch and described the 4th switch in parallel, described the 6th switch is ground connection and the described electrode of link respectively, and described the 6th switch and described the 5th switch inverse.
9. system according to claim 1, also comprise an electronic installation, described electronic installation comprises described display device, and wherein said electronic installation is a mobile phone, a digital camera, a personal digital assistant, a mobile computer, a desktop PC, a TV, a GPS, a vehicle display, a display, a digital frame or a Portable DVD projector for aviation.
10. an input position judging method, be applied to a capacitance type touch-control panel, described contact panel comprises a plurality of capacitor groups, each capacitor group comprises a plurality of capacitor modules, described contact panel also comprises a treatment circuit, described treatment circuit is the capacitor module of each capacitor group of electrically connect and each capacitor group optionally, and described method comprises:
(a) treatment circuit and each capacitor group described in conducting successively, to measure the capacitance of each capacitor group;
(b) capacitance measuring according to step (a), at least one particular comparator group in a plurality of capacitor groups described in identification;
(c) each capacitor module for the treatment of circuit and described particular comparator group described in conducting successively, to measure the capacitance of each capacitor pack module, capacitor module electrically connect community electrode described in each wherein, described treatment circuit comprises a sampling capacitor device, common electrode described in described sampling capacitor device electrically connect, described method also comprises optionally sampling capacitor device and each capacitor group and each capacitor module described in electrically connect, to suppress noise;
(d) capacitance measuring according to step (c), at least one particular comparator module of identification; And
(e), according to the position of described particular comparator module, judge the input position on described contact panel.
11. methods according to claim 10, wherein, in step (d), the plural particular comparator module of identification;
Wherein step (e) also comprises: according to the position of two distances particular comparator module farthest, calculate the central point of described two distances particular comparator module farthest, to judge described input position.
12. methods according to claim 10, wherein, step (b) also comprises: according to the order of step (a), one of particular comparator group front capacitor group and a rear capacitor group described in identification, and step (c) also comprises: successively treatment circuit and described particular comparator group described in conducting, described front capacitor group, with each capacitor module of described rear capacitor group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910137278.2A CN101876871B (en) | 2009-04-30 | 2009-04-30 | Image display system and input position judging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910137278.2A CN101876871B (en) | 2009-04-30 | 2009-04-30 | Image display system and input position judging method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101876871A CN101876871A (en) | 2010-11-03 |
| CN101876871B true CN101876871B (en) | 2014-08-13 |
Family
ID=43019440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910137278.2A Active CN101876871B (en) | 2009-04-30 | 2009-04-30 | Image display system and input position judging method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101876871B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102467284B (en) * | 2010-11-13 | 2016-05-25 | 宸鸿科技(厦门)有限公司 | A kind of true coordinates arrangement for detecting and method for detecting thereof of multiple touch points |
| TWI669639B (en) * | 2018-06-14 | 2019-08-21 | 宏碁股份有限公司 | Electronic device for detecting power of stylus pen |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101271211A (en) * | 2007-03-19 | 2008-09-24 | 精工爱普生株式会社 | Liquid crystal device, electronic apparatus and position detecting method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383713C (en) * | 2004-12-31 | 2008-04-23 | 联想(北京)有限公司 | Information input device of portable electronic device and control method thereof |
-
2009
- 2009-04-30 CN CN200910137278.2A patent/CN101876871B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101271211A (en) * | 2007-03-19 | 2008-09-24 | 精工爱普生株式会社 | Liquid crystal device, electronic apparatus and position detecting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101876871A (en) | 2010-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI412982B (en) | Image display system and method for determining input position thereon | |
| US11481066B2 (en) | Providing a baseline capacitance for a capacitance sensing channel | |
| CN101510132B (en) | Sensor pixel and touch panel thereof | |
| US9547399B2 (en) | Injected touch noise analysis | |
| US9395850B2 (en) | Coordinate input device and display device with the same | |
| TWI381302B (en) | Capacitive touch panel and capacitance sensing apparatus and method for the same | |
| CN101739186B (en) | Image display system, capacitive touch panel and capacitance measuring device and method thereof | |
| US9342199B2 (en) | Touch detection device, display device with touch detection function, and electronic apparatus | |
| CN103218085B (en) | Optical touch display panel | |
| TWI397848B (en) | Touch detection method and touch detection device and touch display device | |
| CN104076997A (en) | Display device with touch detection function and electronic apparatus | |
| US20110181519A1 (en) | System and method of driving a touch screen | |
| CN102419652A (en) | Touch detector, display unit with touch detection function, touched-position detecting method, and electronic device | |
| US8810546B1 (en) | Touchscreen panel frequency response determination | |
| US8692797B2 (en) | Touch recognition apparatus and method in capacitive touch screen | |
| US20180364837A1 (en) | Integrated Touch Sensing and Force Sensing in a Touch Detection Device | |
| CN103984448A (en) | Optical sensing circuit and touch display panel thereof | |
| CN101900904A (en) | Panel display with touch function and touch panel | |
| CN101876871B (en) | Image display system and input position judging method | |
| US8400420B2 (en) | Image display system and method for controlling a touch panel thereof | |
| CN103176673A (en) | Projected capacitive touch panel and coordinate detecting method thereof | |
| CN101424809B (en) | Touch control type lcd device | |
| KR101745428B1 (en) | Touch Sensor, Its Driving Method And Display Device Using The Same | |
| CN103105984B (en) | The scan method of touch-screen | |
| CN106775131B (en) | Touch display substrate and touch display method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: QIMEI ELECTRONIC CO LTD Free format text: FORMER OWNER: TONGBAO OPTOELECTRONICS CO., LTD. Effective date: 20140721 |
|
| C14 | Grant of patent or utility model | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: Hsinchu Science Park, Taiwan, China Applicant after: INNOLUX DISPLAY CORP. Address before: Miaoli County, Taiwan, China Applicant before: CHI MEI OPTOELECTRONICS CORP. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: QIMEI ELECTRONIC CO LTD TO: INNOLUX DISPLAY CORPORATION |
|
| GR01 | Patent grant | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20140721 Address after: Miaoli County, Taiwan, China Applicant after: CHI MEI OPTOELECTRONICS CORP. Address before: Hsinchu, Taiwan, China Applicant before: TOPPOLY OPTOELECTRONICS Corp. |