CN103713412A - Touch display equipment and driving method thereof - Google Patents
Touch display equipment and driving method thereof Download PDFInfo
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- CN103713412A CN103713412A CN201210376778.3A CN201210376778A CN103713412A CN 103713412 A CN103713412 A CN 103713412A CN 201210376778 A CN201210376778 A CN 201210376778A CN 103713412 A CN103713412 A CN 103713412A
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Abstract
The invention discloses touch display equipment and a driving method thereof. A position signal showing that a specific position of a liquid crystal display panel is contacted is acquired by touching the liquid crystal display panel. The touch display equipment comprises multiple grid driving lines, touch driving lines, multiple touch sensing lines, a grid driving unit, multiple output electrodes, and a touch sensing circuit unit, the grid driving lines and the touch driving lines are parallelly arranged on the liquid crystal display panel sequentially, each touch driving line is arranged between two adjacent grid driving lines, the touch sensing lines are sequentially connected with the grid driving lines and the touch driving lines perpendicularly, the grid driving unit is connected with the grid driving lines, each output electrode is sequentially connected with one grid driving line every other grid driving line and sequentially connected with one touch driving line every each touch driving line, and the touch sensing circuit unit is connected with the touch sensing lines. Touch position can be acquired by directly touching a liquid crystal display.
Description
Technical field
The invention relates to a kind of touch-control display device and driving method thereof, espespecially a kind of touch-control display device and driving method thereof that is applicable to Thin Film Transistor-LCD (Thin Film Transistor Liquid Crystal Display, TFT-LCD).
Background technology
In society now, the liquid crystal display with touch controllable function becomes the trend of current consumption electronic product gradually, as display on intelligent mobile phone screen, digital camera panel, flat computer etc.Yet if will there be the function of touch-control above liquid crystal display, at present the general practice is that contact panel and liquid crystal display are separated after making, then by contact panel together with assembling liquid crystal display, and generally often with mutual inductance type contact panel, make.
Please refer to Figure 1A, is known mutual inductance type contact panel schematic diagram.As shown in Figure 1A, mutual inductance type contact panel 405 has many conveyer line Tx1-Txn on directions X, and has in the Y direction many line of induction Rx1-Rxn.Above-mentioned touch detection method is on mutual inductance type contact panel 405, sequentially to drive conveyer line Tx1-Txn, and in the mode of responding to simultaneously, detects whether there is the signal of receiving conveyer line Tx1-Txn through line of induction Rx1-Rxn.Please also refer in Figure 1B, is the block P schematic diagram of known mutual inductance type capacitance touching control panel.When finger presses is during to the ad-hoc location A (being conveyer line Tx2 and line of induction Rx2, Rx3) of mutual inductance type contact panel 405, its conveyer line Tx2 and line of induction Rx2, the voltage signal above Rx3 will be different from the voltage signal of other conveyer lines Tx1, Tx3-Txn, line of induction Rx1, Rx4-Rxn.And can this learn now finger presses is to mutual inductance type contact panel 405 which position (in this case ad-hoc location A).And after having made, in group device liquid crystal display, liquid crystal display is possessed simultaneously touch controllable function.
In other words, the display generally at present with touch controllable function is actually after one group of contact panel of liquid crystal display stack itself, just makes liquid crystal display have touch controllable function, is not that liquid crystal display itself just has touch controllable function.In addition, although see through above-mentioned technology, can allow liquid crystal display have touch controllable function, above-mentioned technology, by the contact panel liquid crystal display that is added to, will cause liquid crystal display weight to become problem heavy, that cost uprises and overall brightness declines.
Inventor whence is because of in this, this is in the spirit of positive invention, urgently think a kind of " touch-control display device and driving method thereof ", utilize gate drive signal that the drive element of the grid of current liquid crystal display sequentially exports as sensing foundation, make liquid crystal display have the effect of touch-control, several times research experiment is eventually to completing the present invention.
Summary of the invention
Because touch controllable function need separate the problem made from Presentation Function, the present invention utilizes gate drive signal that the drive element of the grid of general liquid crystal display inside is orderly sent to a plurality of grid drive wires as sensing foundation, and through a plurality of output stages, gate drive signal is sent to the touch-control drive wire as touch detection, and the signal condition that sees through touch control sensing circuit unit senses touch-control drive wire, and reach the object effect that direct touch liquid crystal display obtains position of touch.Therefore, the present invention does not need to make contact panel in addition again and gains in weight and volume, does not need contact panel cost even completely.Meanwhile, the annexation between a plurality of output stages, touch-control drive wire and grid drive wire, also can prevent the interference to adjacent gate drive wire of the gate drive signal that sequentially transmits, and the problem that can not cause grid drive wire to repeat to open.
For reaching above-mentioned purpose, the invention provides a kind of touch-control display device, to see through touching one display panels, obtain the position signalling that a representative touches display panels ad-hoc location.Touch-control display device comprises a plurality of grid drive wires, a plurality of touch-control drive wire, a plurality of touch-control sensing line, a drive element of the grid, a plurality of output stage and a touch control sensing circuit unit.Wherein, a plurality of grid drive wires, a plurality of touch-control drive wire and a plurality of touch-control sensing line are all and are sequentially arranged on display panels.A plurality of touch-control drive wires, for being sequentially set in parallel between two neighboring gates drive wires, are usingd as sensing foundation.A plurality of touch-control sensing lines are correspondence and a plurality of grid drive wires and the sequentially vertical setting of touch-control drive wire, to detect touch-control, drives online signal condition.
Drive element of the grid connects a plurality of grid drive wires, to produce respectively a plurality of gate drive signals and sequentially to provide to each grid drive wire.Each output stage is every a grid drive wire corresponding grid drive wire that connects sequentially, and every a touch-control drive wire corresponding touch-control drive wire that connects sequentially, to export a touch-control according to gate drive signal, drives signal.Make the touch-control that output stage transmits drive signal can not have influence on the grid drive wire that next output stage connects, and cause on the grid drive wire that above-mentioned next output stage connects, be used as the incorrect conducting that display panels shows a plurality of transistor switches of use.Touch control sensing circuit unit connects a plurality of touch-control sensing lines.Wherein, a plurality of touch-control drive wires are divided into a plurality of groups, and the touch-control drive wire in same group is for interconnecting, a plurality of touch-control sensing lines that connected to see through touch control sensing circuit unit, whether the touch-control of detecting each group drives signal in touching the state of a certain position, and the corresponding position signalling that produces.If the touch-control driving signal that certain the touch-control sensing line that this means, touch control sensing circuit unit connects detects in certain group is to represent the touched signal condition of ad-hoc location on display panels, can obtain the position signalling of above-mentioned ad-hoc location.
In addition, a plurality of output stages of the present invention can be diode, to prevent from being used as the incorrect conducting that display panels shows a plurality of transistor switches of use.
Moreover a plurality of groups of the present invention can comprise three output stages.
Moreover a plurality of gate drive signals of the present invention can be square-wave signal.
In addition, a plurality of group of the present invention can correspond to each position of display panels in conjunction with a plurality of touch-control sensing lines.If arrive and above-mentioned ad-hoc location is touched, touch control sensing circuit unit can be in the touch-control sensing line of ad-hoc location, its touch-control of group that detects ad-hoc location drives the continuous square-wave signal of signal, but this touch-control sensing line detects the capacitance being positioned between this touch-control drive wire and this touch-control sensing line, has change.
The driving method that the present invention also provides a kind of touch-control to show, is applied to a touch-control display device, to see through touching one display panels, obtains the position signalling that a representative touches display panels ad-hoc location.This system comprises a plurality of grid drive wire and touch-control drive wires that are sequentially set in parallel in display panels, and touch-control drive wire is arranged between two neighboring gates drive wires, a plurality of drive element of the grid of a plurality of grid drive wires, a plurality of output stage and each output stage of being sequentially connected with a plurality of grid drive wires and the vertically disposed touch-control sensing line of a plurality of touch-control drive wire, sequentially connects grid drive wire and sequentially connect every a touch-control drive wire touch control sensing circuit unit that touch-control drive wire and connects a plurality of touch-control sensing lines every a grid drive wire.Said method comprises step: (A) in drive element of the grid, sequentially a plurality of grid drive wires are produced to a plurality of gate drive signals, and sequentially correspondence is sent to a plurality of output stages; (B), in a plurality of output stages, according to a plurality of gate drive signals that sequentially produce, export a touch-control and drive signal; Wherein, a plurality of touch-control drive wires are divided into a plurality of groups, and the touch-control drive wire in same group interconnects; And (C) in touch control sensing circuit unit, see through a plurality of touch-control sensing lines and sequentially detect the touch-control of each group and drive signal whether in touching the state of a certain position, and the corresponding position signalling that produces.
Above general introduction and ensuing detailed description are all exemplary in nature, are in order to further illustrate claim scope of the present invention.And relevant other objects and advantages of the present invention are set forth the explanation follow-up and diagram.
Accompanying drawing explanation
Figure 1A is known mutual inductance type capacitance touching control panel schematic diagram.
Figure 1B is the block P schematic diagram of known mutual inductance type capacitance touching control panel.
Fig. 2 is the touch-control display device schematic diagram of a preferred embodiment of the present invention.
Fig. 3 is that gate drive signal and the touch-control of the G1 of group of a preferred embodiment of the present invention drives signal sequence graph of a relation.
Fig. 4 is the driving method process flow diagram that the touch-control of a preferred embodiment of the present invention shows.
Fig. 5 be a preferred embodiment of the present invention touch display panels ad-hoc location schematic diagram.
[main element symbol description]
100 display panels 140 drive element of the grid
150 touch control sensing circuit unit 160 output stages
Ld1-Ldn grid drive wire Lt1-Ltn touch-control drive wire
Ls1-Lsm touch-control sensing line St1～Str touch-control drives signal
Ss1～Ssn gate drive signal G1～Gr group
The Tx1-Txn conveyer line Rx1-Rxn line of induction
A ad-hoc location B ad-hoc location
T time shaft P block
X direction Y direction
S510, S520, S530 step
Embodiment
First, please refer to Fig. 2, is the touch-control display device schematic diagram of a preferred embodiment of the present invention.As shown in Figure 2, touch-control display device is in order to see through touching one display panels 100, and produces the position signalling Sp that a representative touches display panels 100 ad-hoc locations.Touch-control display device comprises a plurality of grid drive wire Ld1-Ldn, a plurality of touch-control drive wire Lt1-Ltn, a plurality of touch-control sensing line Ls1-Lsm, a drive element of the grid 140, a plurality of output stage 160 and a touch control sensing circuit unit 150.Wherein, grid drive wire Ld1-Ldn, touch-control drive wire Lt1-Ltn and touch-control sensing line Ls1-Lsm are all sequentially and are arranged on display panels.And touch-control drive wire Lt1-Ltn for being sequentially set in parallel between the plurality of grid drive wire (as, the touch-control drive wire Lt1 of the present embodiment is set in parallel between grid drive wire Ld1, Ld2), using as sensing foundation.Touch-control sensing line Ls1-Lsm is oppositely arranged with grid drive wire Ld1-Ldn and touch-control drive wire Lt1-Ltn, wherein, the plurality of touch-control drive wire Lt1-Ltn and the plurality of touch-control sensing line Ls1-Lsm respectively have a coupling capacitance each other in staggered place, to detect the signal condition on touch-control drive wire Lt1-Ltn.
Drive element of the grid 140 connects respectively grid drive wire Ld1-Ldn, gate drive signal Ss1-Ssn is sequentially provided to each grid drive wire Ld1-Ldn.And each output stage 160 is by corresponding at least one this touch-control drive wire that is electrically connected, its another end is arbitrary this grid drive wire of sequentially correspondence electric connection, with according to this gate drive signal, export a touch-control drive signal (as, three output stages 160 of the present embodiment are connected respectively to grid drive wire Ld1, Ld3, Ld5, and correspondence is connected to touch-control drive wire Lt1, Lt3, Lt5), with this output touch-control of tool, drive signal St1-Str.In the present embodiment, gate drive signal Ss1-Ssn is square-wave signal.Therefore from above-mentioned mode of connection, touch-control that output stage 160 transmits drives signal by the grid drive wire that can not have influence on next output stage 160 and connect, and cause the grid that above-mentioned next output stage connects to drive online, be used as the undesired conducting that display panels 100 shows a plurality of transistor switches (not being plotted in graphic) of use.As, the touch-control that the output stage 160 that is connected to grid drive wire Ld1 of the present embodiment transmits drives signal St1, and the upper a plurality of transistor switches that connect of the grid drive wire Ld3 that can not affect next output stage 160 are had to abnormal conducting.Wherein, grid drive wire Ld3 is sequentially connected the grid of a plurality of transistor switches, and each grid drive wire Ld1-Ldn a plurality of transistor switches corresponding with it are to be generally used for main element and the technology that shows display panels 100, and and therefore not to repeat here.
Touch control sensing circuit unit 150 connects touch-control sensing line Ls1-Lsm, wherein, a plurality of touch-control drive wire Ls1-Lsm are divided into a plurality of G1-Gr of group, and the touch-control drive wire in same group is for interconnecting, make it when the plurality of output stage 160 output touch-controls drive signals in the plurality of touch-control drive wire of correspondence, the curtage result of variations that the plurality of coupling capacitance variation in these touch control sensing circuit unit 150 each groups of detecting causes (as, the G1 of group of the present embodiment is by touch-control drive wire Lt1-Lt5, grid drive wire Ld1-Ld5, and three output stages 160 form, and touch-control drive wire Lt1-Lt5 interconnects, and three output stages 160 are connected to touch-control drive wire Lt1 and grid drive wire Ld1, touch-control drive wire Lt3 and grid drive wire Ld3, and between touch-control drive wire Lt5 and grid drive wire Ld5, make all by touch-control, to drive signal St1 on touch-control drive wire Lt1-Lt5).Please also refer to Fig. 3, is that gate drive signal Ss1-Ss5 and the touch-control of the G1 of group of a preferred embodiment of the present invention drives signal St1 timing diagram.As shown in Figure 3, due to touch-control drive wire, Lt1-Lt5 interconnects, therefore, gate drive signal Ss1, Ss3, Ss5 will be sent to touch-control drive wire Lt1, Lt3, Lt5 via output stage 160 separately respectively, make touch-control drive the sequential meeting of signal St1 because the relation of output stage 160, sequentially produce the sequential relationship of noble potential, electronegative potential, noble potential, electronegative potential, noble potential, wherein, horizontal ordinate is time shaft t.Certainly, the gate drive signal of the G2-Gr of other groups and touch-control drive the sequential relationship of signal also as the G1 of group, and and therefore not to repeat here.
And next by the touch-control sensing line Ls1-Lsm connecting through touch control sensing circuit unit 150, whether the touch-control of detecting each G1-Gr of group drives signal St1-Str in touching the state of a certain position, and the corresponding position signalling Sp that produces.Meaning, if certain the touch-control sensing line that touch control sensing circuit unit 150 connects detect touch-control in certain group drive signal (as, the touch-control that the touch-control sensing line Ls2 of the present embodiment detects on the G1 of group drives signal St1) for to represent the touched state of ad-hoc location on display panels 100, can obtain the position signalling Sp of above-mentioned ad-hoc location.In the present embodiment, the G1-Gr of group combination of touch control sense wire Ls1-Lsm one-tenth display panels capable of being combined 100 each positions, and can be used as the foundation that position signalling Sp exports.In the present embodiment, if above-mentioned ad-hoc location is touched, arrive, touch control sensing circuit unit 150 will be at the touch-control sensing line of this ad-hoc location, it is continuous ground signalling (as, the touch-control sensing line Ls2 of the present embodiment detects touch-control on the G1 of group to drive signal St1 be continuous ground signalling) that the touch-control that detects the group of ad-hoc location drives signal.Then correspondence is produced and represents that this ad-hoc location is positioned at the position signalling Sp above the touch-control sensing XianLs2Yu G1 of group.
Next, please also refer to Fig. 4 and Fig. 5.Wherein, Fig. 4 is the driving method process flow diagram of the touch-control demonstration of a preferred embodiment of the present invention.Fig. 5 touches display panels ad-hoc location schematic diagram for a preferred embodiment of the present invention.Below by the ad-hoc location B with finger presses display panels 100, and a plurality of output stage 160 is all diode and explains.As shown in Figure 5, in order to detect display panels 100, whether have by finger presses and arrive, drive element of the grid 140 will sequentially produce gate drive signal Ss1-Ssn to grid drive wire Ld1-Ldn, and sequentially correspondence transmits gate drive signal Ss1, Ss3, Ss5...Ssn to a plurality of output stages 160 (step S510).
Next, a plurality of output stages 160 will drive signal St1, St2..., Str, wherein r < n according to gate drive signal Ss1, Ss3, Ss5...Ssn output touch-control.And the touch-control that makes same group drive online touch-control drive signal with identical sequential drives (as, the clock signal on the touch-control drive wire Lt1-Lt5 of the G1 of group of the present embodiment is all touch-control driving signal St1) (step S520).
Come again, whether the touch-control driving signal St1-Str that each G1-Gr of group is sequentially detected through touch-control sensing line Ls1-Ls2 then in touch control sensing circuit unit 150 is in touching a certain position of display panels 100, if detect the touch-control of the group of ad-hoc location, drive signal that the plurality of coupling capacitance is changed, thereby can judge there is this touch sensing device of object touch-control, and the corresponding position signalling Sp (step S530) that produces.In addition, the G1-Gr of group combination of touch control sense wire Ls1-Lsm one-tenth display panels capable of being combined 100 each positions, and can be used as the foundation that position signalling Sp exports.
Therefore, when finger presses is during to display panels 100 ad-hoc location B (being touch-control drive wire Lt1, Lt2 and touch-control sensing line Ls1, Ls2 at the present embodiment), when touch control sensing circuit unit 150 drives the continuous current that variation causes of its coupling capacitance of signal St1 or change in voltage result by the touch-control that detects the G1 of group on touch-control sensing line Ls1, Ls2, then correspondence generation is represented to finger presses is at touch-control sensing line Ls1, position signalling Sp above the G1 of Ls2Yu group.
Therefore from the above, utilize the gate drive signal of drive element of the grid output of general liquid crystal display inside as sensing foundation, and gate drive signal is sent to touch-control drive wire and produces touch-control driving signal through a plurality of output stages, to see through the signal condition of touch control sensing circuit unit senses touch-control drive wire, and reach the object effect that direct touch liquid crystal display obtains the position of touch-control.Make this case not only not need to make contact panel in addition again and gain in weight and volume, not needing contact panel cost even completely.And annexation between a plurality of output stages, touch-control drive wire and grid drive wire also can prevent the interference to adjacent gate drive wire of the gate drive signal that sequentially transmits, and the problem that can not cause grid drive wire to repeat to open.
Above-described embodiment is only given an example for convenience of description, and the interest field that the present invention advocates should be as the criterion certainly described in claim scope, but not only limits to above-described embodiment.
Claims (10)
1. a touch-control display device, comprising:
A plurality of grid drive wires;
A plurality of touch-control drive wires, and be arranged between the plurality of grid drive wire;
A plurality of touch-control sensing lines, sequentially be arranged at a display panels, and with the plurality of grid drive wire and the plurality of touch-control drive wire for being oppositely arranged, wherein, the plurality of touch-control drive wire and the plurality of touch-control sensing line are respectively to have a coupling capacitance each other in staggered place;
One drive element of the grid, connects respectively the plurality of grid drive wire, and sequentially provides a gate drive signal to each this grid drive wire;
A plurality of output stages, each output stage one end is electrically connected to few this touch-control drive wire, and its another end is arbitrary this grid drive wire of sequentially correspondence electric connection, to export a touch-control according to this gate drive signal, drives signal; And
One touch control sensing circuit unit is to connect the plurality of touch-control sensing line;
Wherein, the plurality of output stage is exported the plurality of touch-control and is driven signal when the plurality of touch-control drive wire of correspondence, and the variation of the plurality of coupling capacitance is detected in this touch control sensing circuit unit.
2. touch-control display device according to claim 1, wherein, the plurality of output stage is diode.
3. touch-control display device according to claim 1, the plurality of touch-control drive wire is divided into a plurality of groups, and the plurality of touch-control drive wire in same group interconnects.
4. touch-control display device according to claim 3, wherein, each group at least comprises two output stages.
5. touch-control display device according to claim 1, wherein, the curtage result of variations causing when this coupling capacitance changes is detected in this touch control sensing circuit unit.
6. touch-control display device according to claim 1, wherein, the plurality of gate drive signal is square-wave signal.
7. touch-control display device according to claim 1, wherein, if an ad-hoc location is touched, arrive, this touch control sensing circuit unit is in the plurality of touch-control sensing line of this ad-hoc location, it is continuous square-wave signal that this touch-control that detects this group of this ad-hoc location drives signal, and this touch-control sensing line detects this coupling capacitance being positioned between this touch-control drive wire and this touch-control sensing line and has change.
8. the driving method that a touch-control shows, be applied to a touch-control display device, to see through touching one display panels, obtain the position signalling that a representative touches this display panels one ad-hoc location, this touch-control display device comprises a plurality of a plurality of grid drive wires and a plurality of touch-control drive wires that are sequentially set in parallel in this display panels, and this touch-control drive wire is arranged between the plurality of grid drive wire, a plurality of touch-control sensing lines are be oppositely arranged with the plurality of grid drive wire and the plurality of touch-control drive wire and respectively have a coupling capacitance in the plurality of touch-control drive wire and the plurality of touch-control sensing line place interlaced with each other, one connects this drive element of the grid of the plurality of grid drive wire, a plurality of output stages and each output stage one end are electrically connected at least one this touch-control drive wire by correspondence, its another end is arbitrary this grid drive wire of sequentially correspondence electric connection, and this touch control sensing circuit unit of the plurality of touch-control sensing line of a connection, the method comprises step:
(A), in this drive element of the grid, sequentially the plurality of grid drive wire is produced to a plurality of gate drive signals, and sequentially correspondence is sent to the plurality of output stage;
(B) in the plurality of output stage, according to this received gate drive signal, export a touch-control and drive signal, wherein, the plurality of touch-control drive wire is divided into a plurality of groups, and this touch-control drive wire in same group interconnects; And
(C), in this touch control sensing circuit unit, see through the variation state in being touched whether that the plurality of touch-control sensing line is sequentially detected the plurality of coupling capacitance of each group, and corresponding this ad-hoc location being touched produces this position signalling.
9. the driving method that touch-control according to claim 8 shows, wherein, in step (C), if this ad-hoc location is touched, arrive, this touch control sensing circuit unit is in this touch-control sensing line of this ad-hoc location, this touch-control driving signal that detects this group of this ad-hoc location is continuous square-wave signal, but this touch-control sensing line detects this coupling capacitance being positioned between this touch-control drive wire and this touch-control sensing line, has change.
10. the driving method that touch-control according to claim 8 shows, wherein, this each group comprises at least two output stages.
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| CN101256293A (en) * | 2007-03-02 | 2008-09-03 | 三星电子株式会社 | Display apparatus containing integrated touch sensor |
| CN101726897A (en) * | 2008-10-27 | 2010-06-09 | 海帝士科技公司 | Liquid crystal display with touch screen function and method for detecting external illuminance using the same |
| CN201993738U (en) * | 2011-03-15 | 2011-09-28 | 德理投资股份有限公司 | Projection type capacitor touch panel |
| CN102339156A (en) * | 2010-07-16 | 2012-02-01 | 联咏科技股份有限公司 | Driving method, driving device and touch display device |
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|---|---|---|---|---|
| CN101256293A (en) * | 2007-03-02 | 2008-09-03 | 三星电子株式会社 | Display apparatus containing integrated touch sensor |
| CN101726897A (en) * | 2008-10-27 | 2010-06-09 | 海帝士科技公司 | Liquid crystal display with touch screen function and method for detecting external illuminance using the same |
| CN102339156A (en) * | 2010-07-16 | 2012-02-01 | 联咏科技股份有限公司 | Driving method, driving device and touch display device |
| CN201993738U (en) * | 2011-03-15 | 2011-09-28 | 德理投资股份有限公司 | Projection type capacitor touch panel |
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Effective date of registration: 20170118 Address after: Shenzhen City, Baoan District Province, town, Foxconn science and Technology Industrial Park E District 4, building 1, floor Patentee after: Innocom Technology (Shenzhen) Ltd. Patentee after: Chimei Innolux Corporation Address before: 518109 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 1, floor 4, Patentee before: Innocom Technology (Shenzhen) Ltd. Patentee before: Qimei Electronic Co., Ltd. |