CN103941443A - Liquid crystal display device and driving circuit and method for accelerating liquid crystal molecule deflection - Google Patents
Liquid crystal display device and driving circuit and method for accelerating liquid crystal molecule deflection Download PDFInfo
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- CN103941443A CN103941443A CN201410177639.7A CN201410177639A CN103941443A CN 103941443 A CN103941443 A CN 103941443A CN 201410177639 A CN201410177639 A CN 201410177639A CN 103941443 A CN103941443 A CN 103941443A
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Abstract
The invention relates to the technical field of display, and discloses a liquid crystal display device and a driving circuit and method for accelerating liquid crystal molecule deflection. The driving method comprises the steps that excitation signals are compared with the reference voltages of a public voltage generator, and the comparison result is output; whether compensation control signals are generated or not is judged according to the comparison result, and if the compensation control signals are generated, the compensation control signals are output; according to the compensation control signals, pixel voltages are increased to accelerate the liquid crystal molecule deflection. The public voltage generator is added to the liquid crystal display device, voltage compensation is carried out on a pixel electrode when a screen is touched, the restoration speed of reverse defection of liquid crystal molecules in the touch display process is improved, the shading and smearing phenomenon is avoided, and the liquid crystal display effect is improved.
Description
Technical field
The present invention relates to display technique field, particularly relate to driving circuit, the driving method of a kind of liquid crystal indicator and quickening liquid crystal deflecting element.
Background technology
For the FFS (full name: Fringe Field Switching of liquid crystal display, Chinese name: fringe field switching technology) and IPS (full name: In-Plane Switching, Chinese: plane conversion) pattern, plane electric fields forms between pixel electrode 1 and public electrode 2, as shown in Figure 1, liquid crystal molecule 3 horizontal deflection maximums in the time of maximum brightness, now in the time that liquid crystal molecule is subject to external pressure, particularly in the time touching demonstration, there is reverse deflection in liquid crystal, as shown in Figure 2, liquid crystal molecule is subject to the impact of restoring force, it is more difficult that liquid crystal molecule 3 returns to original horizontal deflection maximum rating, liquid crystal molecule can show mix as shown in Figure 2 thus, in macroscopic view, just show as obfuscation motion blur phenomenon.
Summary of the invention
(1) technical matters that will solve
The object of the invention is driving circuit and the driving method of a kind of liquid crystal indicator and quickening liquid crystal deflecting element, to improve the resume speed of liquid crystal molecule reverse deflection in the time touching demonstration.
(2) technical scheme
In order to solve the problems of the technologies described above, a kind of driving method of accelerating liquid crystal deflecting element provided by the invention, it comprises:
The reference voltage of excitation signal and common electric voltage generator is compared, and export comparative result;
Judge whether to generate compensating control signal according to described comparative result, export if generate compensating control signal;
According to described compensating control signal, increase pixel voltage to accelerate the deflection of liquid crystal molecule.
Further, described according to comparative result generation compensating control signal, be specially: in the time that described excitation signal is high level, the compensating control signal of the ac square-wave voltage that described common electric voltage generator provides to described pixel electrode, and the polarity of the ac square-wave voltage of described common electric voltage generator is contrary with the polarity of data-signal; In the time that described excitation signal is low level, described common electric voltage generator output dc voltage.
Further, the compensating control signal of the ac square-wave voltage that described common electric voltage generator provides to described pixel electrode, is specially:
In the time that described excitation signal is high level, the comparer of common electric voltage generator is positive voltage, and positive voltage becomes negative voltage after the phase inverter of common electric voltage generator, and the first switch disconnects, second switch closure, common electric voltage generator output AC square-wave voltage control signal by way of compensation.
Further, described common electric voltage generator output dc voltage, is specially:
In the time that described excitation signal is low level, the comparer of common electric voltage generator is negative voltage, and negative voltage becomes positive voltage after the phase inverter of common electric voltage generator, and second switch disconnects, the first switch closure, common electric voltage generator output dc voltage.
Further, in the time that described excitation signal is high level, judge that screen has produced touch signal.
Further, the reference voltage of described excitation signal and common electric voltage generator compares, be specially: to common electric voltage generator input reference voltage, signal controller sends excitation signal to described common electric voltage generator, and described common electric voltage generator compares described excitation signal and reference voltage.
Further, signal generator detects whether there is touch signal, and in the time having touch signal, described excitation signal is high level, otherwise described excitation signal is low level.
The present invention also provides a kind of driving circuit of accelerating liquid crystal deflecting element, it comprises signal generator, signal controller, voltage generator and common electric voltage generator, described common electric voltage generator is provided with three input ends and an output terminal, its input end is connected with the data driver of voltage generator, signal controller and liquid crystal indicator respectively, its output terminal is connected to public electrode, the input end of described signal controller connects signal generator, and the input end of described data driver connects signal controller.
Further, described common electric voltage generator comprises comparer, phase inverter, the first switch and second switch, the input end of described comparer is connected with signal controller and data driver respectively, the output terminal of described comparer is connected with phase inverter and second switch, and the output terminal of described phase inverter is connected with the first switch;
The input end of described the first switch connects DC voltage, and its output terminal connects public electrode; The input end of described second switch connects alternating voltage, and its output terminal connects public electrode.
The present invention also provides a kind of liquid crystal indicator, and it comprises above-mentioned driving circuit.
(3) beneficial effect
Driving circuit and the driving method of a kind of liquid crystal indicator that technique scheme provides and quickening liquid crystal deflecting element, in liquid crystal indicator, increase common electric voltage generator, in the time that screen occurs to touch, pixel electrode is carried out to voltage compensation, improve the resume speed of liquid crystal molecule reverse deflection in the time touching demonstration, avoid the motion blur phenomenon that shades, improved liquid crystal display effect.
Brief description of the drawings
Fig. 1 is the deflection state of liquid crystal molecule in the time of maximum brightness;
Fig. 2 is the deflection state of liquid crystal molecule in the time touching demonstration;
Fig. 3 is the driving circuit figure of liquid crystal indicator of the present invention;
Fig. 4 is the circuit diagram of common electric voltage generator of the present invention;
Fig. 5 is ac square-wave voltage sequential chart of the present invention;
Fig. 6 is pixel voltage sequential chart of the present invention.
Wherein, 1, pixel electrode; 2, public electrode; 3, liquid crystal molecule; 4, common electric voltage generator; 5, signal generator; 6, signal controller; 7, ac square-wave voltage; 8, comparer; 9, phase inverter; 10, the first switch; 11, second switch; 12, voltage generator; 13, data driver; 14, gate drivers; 15, data-signal.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 3, a kind of driving circuit of accelerating liquid crystal deflecting element of the embodiment of the present invention, for liquid crystal indicator, it comprises signal generator 5, signal controller 6, voltage generator 12 and common electric voltage generator 4, common electric voltage generator 4 is provided with three input ends and an output terminal, its input end is connected with voltage generator 12, signal controller 6 and data driver 13 respectively, its output terminal is connected to public electrode 2, the input end of signal controller 6 connects signal generator 5, and the input end of data driver 13 connects signal controller 6.Wherein, data driver 13, public electrode 2, pixel electrode and gate drivers 14 all belong to the parts of available liquid crystal display device.Signal generator 5 is for having judged whether touch signal, after screen touches, signal generator 5 generates touch signal and sends to signal controller 6, and signal controller 6 is for sending excitation signal to common electric voltage generator 4, and voltage generator 12 is used to whole equipment power supply.When signal generator 5 has detected after touch signal, the excitation signal that signal controller 6 sends to common electric voltage generator 4 is high level, otherwise be low level, common electric voltage generator 4 is by the driving of the high and low level of excitation signal, output AC voltage or DC voltage, in the time of output AC voltage, can increase pixel voltage.
As shown in Figure 4, preferably, the common electric voltage generator 4 of the present embodiment comprises comparer 8, phase inverter 9, the first switch 10 and second switch 11, voltage generator 12 is that whole common electric voltage generator 4 power supplies are Vcc, the input end of comparer 8 is connected with signal controller 6 and data driver 13 respectively, the output terminal of comparer 8 is connected with phase inverter 9 and second switch 11, and the output terminal of phase inverter is connected with the first switch 10; The output terminal of the first switch 10 and second switch 11 is all connected with public electrode 2, and preferably, the input end of the first switch connects DC voltage, and the input end of second switch connects alternating voltage.
Wherein, comparer 8 is for comparing actual common electric voltage generator 4 excitation signal and the reference voltage Ref obtaining to judge whether need to compensate pixel electrode, in the time that excitation signal is high level, common electric voltage generator 4 output and the ac square-wave voltage 7 that with square wave frequency and the sequential of pixel voltage match contrary with data-signal polarity, to increase pixel voltage.
The present invention also provides a kind of driving method of driving circuit of quickening liquid crystal deflecting element of technique scheme, it comprises: the reference voltage of excitation signal and common electric voltage generator 4 is compared, and export comparative result, excitation signal is the signal that common electric voltage generator 4 obtains from signal controller; Judge whether to generate compensating control signal according to comparative result, export if generate compensating control signal; According to compensating control signal, increase pixel voltage to accelerate the deflection of liquid crystal molecule.
As shown in Figure 3 and Figure 4, generate compensating control signal according to comparative result, be specially:
In the time that signal generator 5 receives touch signal, signal generator sends touch signal to signal controller 6, signal controller sends the excitation signal of high level to common electric voltage generator 4, the voltage ratio reference voltage Ref of excitation signal is high, comparer 8 is exported positive voltage, positive voltage becomes negative voltage after phase inverter 9, now, the first switch 10 cuts out disconnection, second switch 11 closures, because second switch 11 is connected with ac square-wave voltage, common electric voltage generator 4 changes DC voltage into the compensating control signal of the ac square-wave voltage 7 providing to pixel electrode, as shown in Figure 5, and square wave frequency and the sequential of the ac square-wave voltage 7 of common electric voltage generator 4 all match with pixel voltage, and the polarity of this ac square-wave voltage coupling contrary to data-signal 15, as shown in Figure 6, the voltage that is data-signal 15 due to pixel voltage deducts ac square-wave voltage, increase thus pixel voltage, make the fast quick-recovery of liquid crystal molecule,
In the time that signal generator does not produce touch, excitation signal is low level, the voltage of excitation signal is lower than reference voltage Ref, comparer output negative voltage, negative voltage becomes positive voltage after phase inverter, now the first switch 10 closures, second switch 11 is opened, common electric voltage generator output dc voltage, now, pixel voltage does not change.
The above-mentioned reference voltage by excitation signal and common electric voltage generator compares, be specially: to common electric voltage generator input reference voltage, signal controller sends exciting voltage to common electric voltage generator, and common electric voltage generator compares excitation signal and reference voltage.Whether signal generator 5 detects touch signal, and in the time having touch signal, the excitation signal that signal controller 6 sends to common electric voltage generator 4 is high level, otherwise this excitation signal is low level.
The present invention also provides a kind of liquid crystal indicator, and it comprises the driving circuit that technique scheme provides.
Driving circuit and the driving method of liquid crystal indicator of the present invention and quickening liquid crystal deflecting element, in liquid crystal indicator, increase common electric voltage generator, when by touch signal, common electric voltage generator is that pixel electrode carries out voltage compensation, improve the resume speed of liquid crystal molecule reverse deflection in the time touching demonstration, avoid the motion blur phenomenon that shades, improved liquid crystal display effect.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and replacement, these improvement and replacement also should be considered as protection scope of the present invention.
Claims (10)
1. a driving method of accelerating liquid crystal deflecting element, is characterized in that, comprising:
The reference voltage of excitation signal and common electric voltage generator is compared, and export comparative result;
Judge whether to generate compensating control signal according to described comparative result, export if generate compensating control signal;
According to described compensating control signal, increase pixel voltage to accelerate the deflection of liquid crystal molecule.
2. driving method as claimed in claim 1, it is characterized in that, described according to comparative result generation compensating control signal, be specially: in the time that described excitation signal is high level, the compensating control signal of the ac square-wave voltage that described common electric voltage generator provides to described pixel electrode, and the polarity of the ac square-wave voltage of described common electric voltage generator is contrary with the polarity of data-signal; In the time that described excitation signal is low level, described common electric voltage generator output dc voltage.
3. driving method as claimed in claim 2, is characterized in that, the compensating control signal of the ac square-wave voltage that described common electric voltage generator provides to described pixel electrode, is specially:
In the time that described excitation signal is high level, the comparer of common electric voltage generator is positive voltage, and positive voltage becomes negative voltage after the phase inverter of common electric voltage generator, and the first switch disconnects, second switch closure, common electric voltage generator output AC square-wave voltage control signal by way of compensation.
4. driving method as claimed in claim 2, is characterized in that, described common electric voltage generator output dc voltage, is specially:
In the time that described excitation signal is low level, the comparer of common electric voltage generator is negative voltage, and negative voltage becomes positive voltage after the phase inverter of common electric voltage generator, and second switch disconnects, the first switch closure, common electric voltage generator output dc voltage.
5. driving method as claimed in claim 2, is characterized in that, in the time that described excitation signal is high level, judges that screen has produced touch signal.
6. the driving method as described in claim 1-5 any one, it is characterized in that, the reference voltage of described excitation signal and common electric voltage generator compares, be specially: to common electric voltage generator input reference voltage, signal controller sends excitation signal to described common electric voltage generator, and described common electric voltage generator compares described excitation signal and reference voltage.
7. driving method as claimed in claim 6, is characterized in that, signal generator detects whether there is touch signal, and in the time having touch signal, described excitation signal is high level, otherwise described excitation signal is low level.
8. accelerate the driving circuit of liquid crystal deflecting element for one kind, it is characterized in that, comprise signal generator, signal controller, voltage generator and common electric voltage generator, described common electric voltage generator is provided with three input ends and an output terminal, its input end is connected with the data driver of voltage generator, signal controller and liquid crystal indicator respectively, its output terminal is connected to public electrode, the input end of described signal controller connects signal generator, and the input end of described data driver connects signal controller.
9. driving circuit as claimed in claim 8, it is characterized in that, described common electric voltage generator comprises comparer, phase inverter, the first switch and second switch, the input end of described comparer is connected with signal controller and data driver respectively, the output terminal of described comparer is connected with phase inverter and second switch, and the output terminal of described phase inverter is connected with the first switch;
The input end of described the first switch connects DC voltage, and its output terminal connects public electrode; The input end of described second switch connects alternating voltage, and its output terminal connects public electrode.
10. a liquid crystal indicator, is characterized in that, comprises driving circuit as claimed in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410177639.7A CN103941443B (en) | 2014-04-29 | 2014-04-29 | Liquid crystal indicator and accelerate liquid crystal molecule deflection drive circuit and method |
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| CN201410177639.7A CN103941443B (en) | 2014-04-29 | 2014-04-29 | Liquid crystal indicator and accelerate liquid crystal molecule deflection drive circuit and method |
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| CN103941443B CN103941443B (en) | 2016-08-24 |
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| WO2016106787A1 (en) * | 2014-12-30 | 2016-07-07 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display device |
| WO2017031786A1 (en) * | 2015-08-25 | 2017-03-02 | 深圳市华星光电技术有限公司 | Voltage regulating circuit |
| WO2017133042A1 (en) * | 2016-02-01 | 2017-08-10 | 深圳市华星光电技术有限公司 | Method for driving liquid crystal display panel |
| WO2019174359A1 (en) * | 2018-03-15 | 2019-09-19 | 京东方科技集团股份有限公司 | Voltage compensation method and apparatus, and touch display module |
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| WO2016106787A1 (en) * | 2014-12-30 | 2016-07-07 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display device |
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| CN103941443B (en) | 2016-08-24 |
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