CN104281297A - Touch screen and driving device thereof - Google Patents
Touch screen and driving device thereof Download PDFInfo
- Publication number
- CN104281297A CN104281297A CN201310279301.8A CN201310279301A CN104281297A CN 104281297 A CN104281297 A CN 104281297A CN 201310279301 A CN201310279301 A CN 201310279301A CN 104281297 A CN104281297 A CN 104281297A
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- CN
- China
- Prior art keywords
- drive singal
- switch
- touch screen
- base board
- electrode base
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- 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.)
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a driving device of a touch screen. A (TX) driving unit is used for generating TX driving signals to be coupled to a TX electrode substrate, an (RX) electrode substrate makes induction to obtain RX detection signals, and the RX detection signals are detected by an RX detecting unit. A plurality of TX driving signals can be generated and fed back to the TX electrode substrate at the same time, and the TX driving signals have different phases at a certain period.
Description
Technical field
The present invention relates to a kind of Touch Screen, particularly relate to a kind of device simultaneously driving multiple signals of Touch Screen.
Background technology
Touch Screen is the I/O device of combination of touch control technology and display technique, directly carries out interaction with shown person in order to allow user.Fig. 1 shows the waveform of the drive singal of conventional touch screen.During t0 to t3, the first electrode wires that drive singal TX1 is relevant is driven, and other electrode wires (second and third such as, relevant to drive singal TX2 and TX3 electrode wires) then must be waited for.Principle according to this, the second electrode wires is driven during t3 to t6, and the 3rd electrode wires is driven during t6 to t9.Therefore, t0 to t9 very long a period of time must be spent just to complete the driving of three strip electrode lines.
Above-mentioned conventional ADS driving mechanism cannot be applicable to the advanced Touch Screen of larger panel size or larger resolution, and main cause is that signal processor cannot complete all drivings and testing in real time, thus causes the leakage of detection.
Although have some mechanism to be suggested to accelerate to drive (such as driving multiple electrode wires), but most mechanism can produce moment sudden and violent value-added problem, thus improves the complexity of detection simultaneously.
Therefore need badly and propose a kind of novel mechanism to increase actuating speed, and do not have the generation of spinoff.
Summary of the invention
In view of above-mentioned, one of object of the embodiment of the present invention is the drive unit proposing a kind of Touch Screen, can not cause the problem that explodes of direct current (DC) value in order to effectively to increase actuating speed.
According to the embodiment of the present invention, Touch Screen comprises transmission (TX) electrode base board, TX driver element receives (RX), electrode base board and RX detecting unit.TX driver element is coupled to TX electrode base board in order to produce TX drive singal.Based on TX drive singal, on RX electrode base board, induction obtains RX detection signal.RX detecting unit is in order to detect RX detection signal.Multiple TX drive singal is produced and is fed to TX electrode base board simultaneously, and these TX drive singal within a certain period have out of phase.
Accompanying drawing explanation
Fig. 1 shows the waveform of the drive singal of conventional touch screen.
Fig. 2 shows the schematic diagram of the drive unit of the Touch Screen of the embodiment of the present invention.
The driving of the Touch Screen of Fig. 3 A view similar.
Fig. 3 B illustrates phase place and the DC value of Fig. 3 A.
Fig. 3 C shows another example of phase place and DC value.
Fig. 4 shows the schematic diagram of the generation circuit of TX drive singal.
[symbol description]
100 Touch Screens
11 carry electrode substrates
111 carry electrode lines
12 receiving electrode substrates
121 receiving electrode lines
13 transmit driver element
14 receive detecting unit
TX1 ~ TX3 transmits drive singal
TX transmits drive singal
RX receives detection signal
H high voltage
L low-voltage
SW1 first switch
SW2 second switch
Φ switch-over control signal
anti-phase switch-over control signal
Embodiment
Fig. 2 shows the schematic diagram of the drive unit of the Touch Screen 100 of the embodiment of the present invention.Touch Screen 100 can be embedded touch screen, and its sensing electrode layer is located in Liquid Crystal Module, but is not limited to this.In order to easily understand the present embodiment, Fig. 2 only shows the touch-control part of Touch Screen 100.In the present embodiment, Touch Screen 100 comprises transmission (TX) electrode base board 11, and on it, patterning has multiple parallel TX electrode wires 111.Although Fig. 2 with the TX electrode wires 111 of rectilinear form illustratively, but TX electrode wires 111 also can be other shape, such as rhombus.Touch Screen 100 also comprises reception (RX) electrode base board 12, and on it, patterning has multiple parallel RX electrode wires 121.Although Fig. 2 with the RX electrode wires 121 of rectilinear form illustratively, but RX electrode wires 121 also can be other shape, such as rhombus.TX electrode wires 111 perpendicular to RX electrode wires 121, but can be not limited to this.
As shown in Figure 2, TX electrode wires 111 receives the TX drive singal that TX driver element 13 sends respectively.RX detecting unit 14 receives RX detection signal respectively from RX electrode wires 121.RX detection signal by electric capacity between TX electrode wires 111 and RX electrode wires 121 respond to and obtain, and the finger touching that this electric capacity can be subject on RX electrode base board 12 affected.Thus, the affected RX detection signal of electric capacity, together with driven TX electrode wires, can be used to determine touch position.
The driving of the Touch Screen 100 of Fig. 3 A view similar.In the present embodiment, produce multiple (3 such as illustrated in Fig. 3 A) TX drive singal simultaneously and be fed to corresponding TX electrode wires respectively, these TX electrode wires also need not be adjacent.
According to one of feature of the present embodiment, the odd number TX drive singal as illustrated in Fig. 3 B, within a certain period (such as t0 to t1), TX drive singal has different phase places.Such as, during t0 to t1, a TX drive singal has positive phase (+), and the 2nd TX drive singal has positive phase (+), and the 3rd TX drive singal has minus phase (-).Thus, namely entirety (or effective) direct current (DC) value (such as 1) of the TX drive singal within a certain period does not have the situation exploded.Compared to the conventional ADS driving mechanism shown in Fig. 1, the driving mechanism of the present embodiment (Fig. 3 A and Fig. 3 B) can increase actuating speed and reaches three times and can maintain identical DC value.Fig. 3 C shows the example of even number TX drive singal.Be similar to the result of Fig. 3 B, entirety (or effective) direct current (DC) value (such as 2) of the TX drive singal within a certain period does not have the situation exploded yet.
According to another feature of the present embodiment, within all periods, TX drive singal has identical overall DC value.As illustrated in Fig. 3 B, within all periods, the overall DC value of TX drive singal is all 1.Moreover in the present embodiment, the TX drive singal in during each has the overall DC value of non-zero (plus or minus).
The TX drive singal of the present embodiment can use various circuit design techniques to produce.As shown in Figure 4, the TX drive singal of tool positive phase is coupled to high voltage (H) and low-voltage (L) respectively alternately by the first interrupteur SW 1 and second switch SW2 and obtains, and the first interrupteur SW 1 is controlled by switch-over control signal Φ and anti-phase switch-over control signal respectively with second switch SW2
.The TX drive singal of tool minus phase is then by replacing mutually switch-over control signal Φ and anti-phase switch-over control signal
and obtain; Or use phase inverter by the TX drive singal of tool positive phase through anti-phase and obtain.In addition, high voltage (H) or low-voltage (L) can be used voltage more by a small margin and be obtained by pump circuit (bump circuit).
According to above-described embodiment, effectively can increase actuating speed and the problem that explodes of direct current (DC) value can not be caused.
The foregoing is only the preferred embodiments of the present invention, and be not used to limit claim of the present invention; Under all other does not depart from the spirit that invention discloses, the equivalence that completes changes or modifies, and all should comprise within the scope of the following claims.
Claims (12)
1. a drive unit for Touch Screen, described Touch Screen comprises transmission (TX) electrode base board and reception (RX) electrode base board, and described drive unit comprises:
TX driver element, is coupled to described TX electrode base board in order to produce TX drive singal, and the induction of described RX electrode base board obtains RX detection signal, and detect by RX detecting unit;
Wherein multiple described TX drive singal is produced and is fed to described TX electrode base board simultaneously, and these TX drive singal within a certain period have out of phase.
2. the drive unit of Touch Screen according to claim 1, wherein, on described TX electrode base board, patterning has multiple TX electrode wires, in order to receive described TX drive singal.
3. the drive unit of Touch Screen according to claim 2, wherein, on described RX electrode base board, patterning has multiple RX electrode wires, and it is coupled to described RX detecting unit.
4. the drive unit of Touch Screen according to claim 1, within all periods, these TX drive singal have identical overall direct current (DC) value.
5. the drive unit of Touch Screen according to claim 1, wherein, these TX drive singal in during each have overall direct current (DC) value of non-zero.
6. the drive unit of Touch Screen according to claim 1, wherein, described TX driver element comprises:
Device, in order to be coupled to high voltage;
Device, in order to be coupled to low-voltage;
First switch, controllably exports as described TX drive singal by described high voltage; And
Second switch, controllably exports as described TX drive singal by described low-voltage;
Wherein said first switch and described second switch are controlled by switch-over control signal and anti-phase switch-over control signal respectively, be coupled to described high voltage and described low-voltage respectively alternately and obtain described TX drive singal by described first switch and described second switch.
7. a Touch Screen, comprises:
Transmit (TX) electrode base board;
TX driver element, is coupled to described TX electrode base board in order to produce TX drive singal;
Receive (RX) electrode base board, based on described TX drive singal, on described RX electrode base board, induction obtains RX detection signal; And
RX detecting unit, in order to detect described RX detection signal;
Wherein multiple described TX drive singal is produced and is fed to described TX electrode base board simultaneously, and these TX drive singal within a certain period have out of phase.
8. Touch Screen according to claim 7, wherein, on described TX electrode base board, patterning has multiple TX electrode wires, in order to receive described TX drive singal.
9. Touch Screen according to claim 8, wherein, on described RX electrode base board, patterning has multiple RX electrode wires, and it is coupled to described RX detecting unit.
10. Touch Screen according to claim 7, within all periods, these TX drive singal have identical overall direct current (DC) value.
11. Touch Screens according to claim 7, wherein, these TX drive singal in during each have overall direct current (DC) value of non-zero.
12. Touch Screens according to claim 7, wherein, described TX driver element comprises:
Device, in order to be coupled to high voltage;
Device, in order to be coupled to low-voltage;
First switch, controllably exports as described TX drive singal by described high voltage; And
Second switch, controllably exports as described TX drive singal by described low-voltage;
Wherein said first switch and described second switch are controlled by switch-over control signal and anti-phase switch-over control signal respectively, be coupled to described high voltage and described low-voltage respectively alternately and obtain described TX drive singal by described first switch and described second switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310279301.8A CN104281297A (en) | 2013-07-04 | 2013-07-04 | Touch screen and driving device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310279301.8A CN104281297A (en) | 2013-07-04 | 2013-07-04 | Touch screen and driving device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN104281297A true CN104281297A (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310279301.8A Pending CN104281297A (en) | 2013-07-04 | 2013-07-04 | Touch screen and driving device thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108021279A (en) * | 2016-11-03 | 2018-05-11 | 禾瑞亚科技股份有限公司 | Touch-control processing unit, method and electronic system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009016382A2 (en) * | 2007-07-31 | 2009-02-05 | Qrg Limited | Sensor and method of sensing |
| CN101632060A (en) * | 2007-01-03 | 2010-01-20 | 苹果公司 | Simultaneous sensing arrangement |
-
2013
- 2013-07-04 CN CN201310279301.8A patent/CN104281297A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101632060A (en) * | 2007-01-03 | 2010-01-20 | 苹果公司 | Simultaneous sensing arrangement |
| WO2009016382A2 (en) * | 2007-07-31 | 2009-02-05 | Qrg Limited | Sensor and method of sensing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108021279A (en) * | 2016-11-03 | 2018-05-11 | 禾瑞亚科技股份有限公司 | Touch-control processing unit, method and electronic system |
| CN108021279B (en) * | 2016-11-03 | 2020-12-18 | 禾瑞亚科技股份有限公司 | Touch processing device and method and electronic system |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150114 |
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| WD01 | Invention patent application deemed withdrawn after publication |