CN1652193A - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN1652193A
CN1652193A CN 200510056510 CN200510056510A CN1652193A CN 1652193 A CN1652193 A CN 1652193A CN 200510056510 CN200510056510 CN 200510056510 CN 200510056510 A CN200510056510 A CN 200510056510A CN 1652193 A CN1652193 A CN 1652193A
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CN
China
Prior art keywords
start signal
scanning start
display unit
image
signal
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Pending
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CN 200510056510
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Chinese (zh)
Inventor
杨健生
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AU Optronics Corp
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AU Optronics Corp
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Publication date
Application filed by AU Optronics Corp filed Critical AU Optronics Corp
Priority to CN 200510056510 priority Critical patent/CN1652193A/en
Publication of CN1652193A publication Critical patent/CN1652193A/en
Pending legal-status Critical Current

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  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

The present invention relates to a display panel applicable to display device for displaying an image. It includes display unit, first and second scanning drives and first and second data drives. Said invention also provides the concrete action of the above-mentioned every component, and provides their working procedures.

Description

Display panel and display device
Technical field
The present invention particularly relevant for a kind of display panel, utilizes two groups of data drivers and scanner driver relevant for a kind of display device, shows corresponding image and single gray level image respectively to drive display unit, with the phenomenon of removal of images towing.
Background technology
Fig. 1 is the panel synoptic diagram of the known liquid crystal display of expression (Liquid crystal display) device.Panel 1 comprises data driver 10, scanner driver 11 and array of display 12.Many data line D of data driver 10 controls 1To D n, and scanner driver 11 control multi-strip scanning line S 1To S mArray of display 12 is by staggered in twos data line D 1To D nAnd sweep trace S 1To S mForm, and each staggered data line and sweep trace form a display unit, for example, data line D 1With sweep trace S 1Form display unit 100.Consult Fig. 1, the equivalent electrical circuit of display unit 100 (other display unit is also identical) comprises switching transistor T10, holding capacitor Cs10 and liquid crystal capacitor Clc10.
Scanner driver 11 is sent sweep signal in regular turn to sweep trace S 1To S m, and make with the switching transistor of all display units in the conducting delegation only in a flash, and turn-off the switching transistor that other row is gone up all display units.2 of data drivers are according to view data to be shown, via data line D 1To D n, send corresponding vision signal (gray-scale value) to the display unit of delegation.For instance, send sweep signal to sweep trace S when scanner driver 11 1The time, the switching transistor T10 conducting of display unit 100,12 of data drivers pass through data line D 1The vision signal of correspondence is sent in the display unit 100, and comes the voltage of stored video signal by memory capacitance Cs10.Liquid crystal molecule among the liquid crystal capacitor Clc10 then determines whether deflection according to the voltage of holding capacitor Cs10, make from the light of backlight module by or intercept light.
In the control of LCD display device, display unit uses keeps driving (hold-driving).Consult Fig. 2 A, keep driving and refer to that in showing a frame, unanimity is kept in the brightness of display unit (I).With the circuit operation viewpoint, promptly be during display frame F11, the voltage of holding capacitor Cs10 is kept definite value always, shows next frame F12 up to the LCD display device.Yet because the liquid crystal response time is lower than a frame period, therefore, when the voltage of the vision signal of frame F12 provided to holding capacitor Cs10, the voltage that is stored in holding capacitor Cs10 in frame F11 was eliminated as yet.Thus, when the LCD display device shows dynamic image, then can produce the phenomenon of image towing.
(Cathode Ray Tube, CRT) display device is controlled luminosity via the intensity of gated sweep electron beam to conventional cathode ray tube.The CRT display device is used pulsed drive (impulse-driving), consults Fig. 2 B, and its expression is luminous measures oscillogram with the time.Because in an image duration, the brightness of CRT display device is not to continue to keep certain value, therefore, when the CRT display device shows dynamic image, the phenomenon of image towing can not take place.
Summary of the invention
In view of this, in order to address the above problem, fundamental purpose of the present invention is to provide a kind of display panel, is applicable to the panel of display device, when display device shows dynamic image, the phenomenon of image towing can not take place.
For realizing above-mentioned purpose, the present invention proposes a kind of display device in order to show an image, and it comprises display panel and time schedule controller.This display panel also comprises display unit, first and second scanner driver and first and second data driver.Time schedule controller provides the first scanning start signal, the second scanning start signal, and the first data start signal.First scanner driver receives the first scanning start signal, and first data driver receives the first data start signal.When first scanner driver according to the first scanning start signal during with the conducting display unit, first data driver is sent to display unit to provide to vision signal that should image according to the first data start signal.Second scanner driver receives the second scanning start signal.When second scanner driver scanned start signal with the conducting display unit according to second, second data driver provided preset signals to be sent to this display unit.In addition, time schedule controller is configurable in display panel.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail as follows.
Description of drawings
Fig. 1 is the panel synoptic diagram of the known LCD display device of expression.
Fig. 2 A is that expression is being kept pattern, the brightness of display unit and time relation synoptic diagram according to the LCD display device.
Fig. 2 B be the expression according to the CRT display device at pulse mode, brightness and time relation synoptic diagram.
Fig. 3 is the display device synoptic diagram of the expression embodiment of the invention.
Fig. 4 represents this according to inventive embodiments, the brightness of display unit and time relation synoptic diagram.
Fig. 5 is the display device synoptic diagram of the expression embodiment of the invention.
Symbol description:
1,30～display panel;
3～display device;
10,303,304～data driver;
11,301,302～scanner driver;
12,300～array of display;
31～time schedule controller;
100,300P～display unit;
305～input port;
Clc10, Clc30～liquid crystal capacitor;
COM～electrode;
Cs10, Cs30～holding capacitor;
D 1... D n, DB 1... DB n,～sweep trace;
PE～pixel electrode;
S 1... S m, SB 1... SB m,～sweep trace;
T10, T30, T31～transistor;
Embodiment
Fig. 3 represents display device of the present invention.Display device 3 has display panel 30 and time schedule controller 31.Display panel 30 has array of display 300, scanner driver 301 and 302, data driver 303 and 304 and input port 305.Scanner driver 301 control multi-strip scanning line S 1To S m, and scanner driver 302 control multi-strip scanning line SB 1To SB mMany data line D of data driver 303 controls 1To D n, and many data line DB of data driver 304 controls 1To DB nArray of display 300 is by data line D 1To D nAnd DB 1To DB nAnd sweep trace S 1To S mAnd SB 1To SB mForm, and each staggered data line and sweep trace form a display unit, for example, data line D 1And DB 1With sweep trace S 1And SB 1Form display unit 300P.Time schedule controller 31 receives vertical synchronizing signal VSYN, horizontal-drive signal HSYN, and clock signal CLK, and produce scanning start signal VST and VST_B and data start signal HST.
Consult Fig. 3, the equivalent electrical circuit of display unit 300P (other display unit is also identical) comprises two switch modules, holding capacitor Cs30 and liquid crystal capacitor Clc30.In the present embodiment, this two switch module is respectively nmos pass transistor T30 and T31.The grid of transistor T 30 couples sweep trace S 1, its drain electrode couples data line D 1, and its source electrode couples pixel electrode PE.The grid of transistor T 31 couples sweep trace SB 1, its drain electrode couples data line DB 1, and its source electrode couples pixel electrode PE.Memory capacitance Cs30 be coupled to pixel electrode PE and common electrode COM between.Liquid crystal capacitance Clc30 be coupled to pixel electrode PE and common electrode COM between.
For convenience of description, be that example illustrates present embodiment next, and side by side carry out same operation with other display unit and the display unit 300P of delegation with display unit 300P with display unit 300P.
Fig. 4 represents according to the embodiment of the invention, the brightness of display unit 300P and time relationship synoptic diagram.
Consult Fig. 3 and Fig. 4, in the present embodiment, for display unit 300P, one image duration F31 be divided into T1 and second phase T2 between the first phase.T1 between the first phase, scanner driver 301 are according to the scanning start signal VST from time schedule controller 31, to pass through sweep trace S 1Come conducting display unit 300P.After display unit 300P conducting, data driver 303 is according to the data start signal HST from time schedule controller 31, to pass through data line D 1The vision signal of correspondence is sent to display unit 300P.At this moment, display unit 300P then comes display image according to vision signal.Consult Fig. 4, among the T1, the brightness of pixel cell 300P is kept necessarily between the first phase.Wherein, the indication of this vision signal in the image that display device 3 desires show, and display unit 300P the parts of images that should show.
In the second phase T2 that is connected in T1 between the first phase, scanner driver 302 is according to the scanning start signal VST_B from time schedule controller 31, to pass through sweep trace BS 1Come conducting display unit 300P.After display unit 300P conducting, data driver 304 is by data line DB 1The corresponding preset signal is sent to display unit 300P.Preset signals is indicated single gray level image, for example complete black or complete white image.Be example in the present embodiment with all black picture.Consult Fig. 4, in second phase T2, the brightness of pixel cell 300P is kept necessarily.Because scanner driver 301 and 302 is in different time operations, therefore, scanning start signal VST and VST_B are different, and in other words, scanning start signal VST has different sequential with VST_B.
In the embodiments of figure 3, time schedule controller 31 is disposed at the outside of display panel 30, therefore, time schedule controller 31 by input port 305 will scan start signal VST, scanning start signal VST_B and data start signal HST are sent to scanner driver 301, scanner driver 302 and data driver 303 respectively.
In embodiments of the present invention, time schedule controller 31 is also configurable in display panel 30, consults Fig. 5.In time schedule controller 31 was disposed at display panel 30,31 of time schedule controllers passed through input port 305 and receive vertical synchronizing signal VSYN, horizontal-drive signal HSYN, and clock signal CLK.In other words, display panel 30 receives vertical synchronizing signal VSYN, horizontal-drive signal HSYN, and clock signal CLK, and produce scanning start signal VST and VST_B and data start signal HST by the time schedule controller 31 of inside.
In sum, embodiments of the invention have two scanner drivers and two data drivers.Scanner driver 301 cooperation data drivers 303 drive all display units of array of display 300, with the image that shows that display device 3 desires show.302 all display units that cooperate data driver 304 to drive array of display 300 of scanner driver are to show single gray level image, for example complete black or complete white.Therefore, an image duration, each display unit before this according to vision signal with display image behind length, again according to preset signals to show complete black or complete white image.Promptly be that before entering to an image duration during the next frame, each display unit switches to and shows complete black or complete white picture, with the pulsed drive image display mode of emulation CRT display device, to suppress the phenomenon of LCD display device generation image towing.
In embodiments of the present invention, do explanation with a display unit.Generally, carry out identical operations simultaneously with the display unit of delegation, and multirow is operated in order.The order of this operation, system requirements and changing to some extent in regular turn.In addition, in practical operation, with the length of the second phase, decide between the first phase in the frame according to system requirements.
Though the present invention with preferred embodiment openly as above; right its is not that any those skilled in the art are under the situation that does not break away from the spirit and scope of the present invention in order to qualification the present invention; can change and modification, so protection scope of the present invention is as the criterion with the claim institute restricted portion that is proposed.

Claims (16)

1. a display panel is applicable to a display device, in order to show an image, comprising:
One display unit;
One first scanner driver receives one first scanning start signal;
One first data driver, receive one first data start signal, wherein, when this first scanner driver according to this first scanning start signal during with this display unit of conducting, this first data driver is sent to this display unit to provide to a vision signal that should image according to this first data start signal;
One second scanner driver receives one second scanning start signal; And
One second data driver is when this second scanner driver during with this display unit of conducting, is sent to this display unit in order to a preset signals to be provided according to this second scanning start signal.
2. display panel as claimed in claim 1, wherein, this preset signals is indicated a single gray level image.
3. display panel as claimed in claim 2, wherein, this single image is complete black or complete white.
4. display panel as claimed in claim 1, wherein, this first and second scanning start signal sequential different.
5. display panel as claimed in claim 1, wherein, in an image duration, this display unit receives this vision signal earlier to show this image in a schedule time, and then, this display unit receives this preset signals to show single gray level image.
6. display panel as claimed in claim 1 also comprises time schedule controller, in order to according to a vertical synchronizing signal, one horizontal-drive signal, and one clock signal to produce this first scanning start signal, this second scanning start signal, and this first data start signal.
7. display panel as claimed in claim 6, wherein, in an image duration, this first scanning start signal of this time schedule controller output earlier, and after a schedule time, this time schedule controller is exported this second scanning start signal.
8. a display device is applicable to show an image, comprising:
Time schedule controller is in order to provide one first scanning start signal, one second scanning start signal, and one first data start signal; And
One display panel;
This display panel comprises:
One display unit;
One first scanner driver receives this first scanning start signal;
One first data driver, receive this first data start signal, wherein, when this first scanner driver according to this first scanning start signal during with this display unit of conducting, this first data driver is sent to this display unit to provide to a vision signal that should image according to this first data start signal;
One second scanner driver receives this second scanning start signal; And
One second data driver is when this second scanner driver during with this display unit of conducting, is sent to this display unit in order to a preset signals to be provided according to this second scanning start signal.
9. display device as claimed in claim 8, wherein, this time schedule controller is according to a vertical synchronizing signal, one horizontal-drive signal, and one clock signal to produce this first scanning start signal, this second scanning start signal, and this first data start signal.
10. display device as claimed in claim 9, wherein, in an image duration, this first scanning start signal of this time schedule controller output earlier, and after a schedule time, this time schedule controller is exported this second scanning start signal.
11. display device as claimed in claim 8, wherein, this time schedule controller is disposed in this display panel, and according to a vertical synchronizing signal, one horizontal-drive signal, and one clock signal to produce this first scanning start signal, this second scanning start signal, and this first data start signal.
12. display device as claimed in claim 11, wherein, in an image duration, this first scanning start signal of this time schedule controller output earlier, and after a schedule time, this time schedule controller is exported this second scanning start signal.
13. display device as claimed in claim 8, wherein, this preset signals is indicated a single gray level image.
14. display device as claimed in claim 13, wherein, this single gray level image is complete black or complete white.
15. display device as claimed in claim 8, wherein, this first and second scanning start signal sequential different.
16. display device as claimed in claim 8, wherein, in an image duration, this display unit elder generation receiving video signals is to show this image in a schedule time, and then, this display unit receives this preset signals to show single gray level image.
CN 200510056510 2005-03-18 2005-03-18 Display panel and display device Pending CN1652193A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100461254C (en) * 2006-04-27 2009-02-11 友达光电股份有限公司 Liquid crystal display and shift buffer memory unit
US7746314B2 (en) 2006-03-22 2010-06-29 Au Optronics Corp. Liquid crystal display and shift register unit thereof
CN102543018A (en) * 2010-12-13 2012-07-04 乐金显示有限公司 Liquid crystal display device and method of driving the same
WO2020143088A1 (en) * 2019-01-09 2020-07-16 惠科股份有限公司 Display panel driving method, driving circuit and display device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7746314B2 (en) 2006-03-22 2010-06-29 Au Optronics Corp. Liquid crystal display and shift register unit thereof
CN100461254C (en) * 2006-04-27 2009-02-11 友达光电股份有限公司 Liquid crystal display and shift buffer memory unit
CN102543018A (en) * 2010-12-13 2012-07-04 乐金显示有限公司 Liquid crystal display device and method of driving the same
CN102543018B (en) * 2010-12-13 2015-04-01 乐金显示有限公司 Liquid crystal display device and method of driving the same
US9646550B2 (en) 2010-12-13 2017-05-09 Lg Display Co., Ltd. Liquid crystal display device and method of driving the same
WO2020143088A1 (en) * 2019-01-09 2020-07-16 惠科股份有限公司 Display panel driving method, driving circuit and display device
US11263945B2 (en) 2019-01-09 2022-03-01 HKC Corporation Limited Driving method of display panel, driving circuit and display device

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