CN101110186A - Display driving apparatus, display apparatus and driving method for display apparatus - Google Patents
Display driving apparatus, display apparatus and driving method for display apparatus Download PDFInfo
- Publication number
- CN101110186A CN101110186A CNA2006101057197A CN200610105719A CN101110186A CN 101110186 A CN101110186 A CN 101110186A CN A2006101057197 A CNA2006101057197 A CN A2006101057197A CN 200610105719 A CN200610105719 A CN 200610105719A CN 101110186 A CN101110186 A CN 101110186A
- Authority
- CN
- China
- Prior art keywords
- voltage signal
- display
- display panel
- pixel
- driver
- 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.)
- Granted
Links
Images
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention discloses a display drive device, which is intended to resolve the problem of straight strip during the starting up of the system and the coordinated display panel of notebook computer. The invention comprises a single-channel pulse width adjustment circuit, a voltage increase and decrease circuit, a delay circuit and a display driver. With an operation voltage signal provided by the delay circuit for starting up the pixel of the display panel, so that the delay circuit can provide a logic operation voltage signal and a voltage signal for starting up/closing the pixel to the display drive device at a later time, thus eliminating the occurrence of straight strips.
Description
Technical field
The present invention is relevant for a kind of display drive apparatus, and is particularly to a kind of display drive apparatus in order to the system that solves notebook computer for example and display panel collocation generation vertical bar line phenomenon when the start.
Background technology
In digitized life now, affirming and accepting because of what it was light, thin, short, little characteristic has been subjected to masses as flat-panel screens such as LCD, organic light emitting diode display, plasma displays.And in the portable electronic devices, as the use of bound flat-panel screens especially in notebook computer, portable digital-video optical disc player, the personal digital assistant etc.But because of flat-panel screens in collocation for example during the system of notebook computer, each voltage signal of flat-panel screens inside may produce vertical bar line phenomenon at system's input data and signal on display panel when making start.The generation of vertical bar line phenomenon is from top to bottom to occur on systematicness ground at display panel, so will consume unnecessary electric power and make the quality of flat-panel screens itself be subjected to consumer's query at display panel.
Fig. 1 is a kind of existing display drive apparatus 10, and it is applicable to above-mentioned flat-panel screens.Please refer to Fig. 1, display drive apparatus 10 includes single channel pulse-width modulation circuit 11, step-up/step-down circuit 13 and display driver 15.Wherein, with display panel 17 when start relevant voltage signal the voltage signal VDDD that is used to provide display drive apparatus 10 logical operations required is provided, is used to open the voltage signal VDDG of the pixel of display panel 17, the voltage signal VEEG of pixel that is used to close display panel 17 and the operating voltage signal VDDA when being used to provide display panel 17 pixels to open.
Please refer to Fig. 1, single channel pulse-width modulation circuit 11 receives the power supply of voltage signal VDDD, and the operating voltage signal VDDA when providing pixel to open is to step-up/step-down circuit 13 and display driver 15.Then, step-up/step-down circuit 13 provides voltage signal VDDG and VEEG to display driver 15 according to voltage signal VDDA, and it is in order to the open and close of the pixel of controlling display panel 17 respectively.At last, display driver 15 drives display panel 17 according to voltage signal VDDA, the VEEG and the VDDG that are received.
System's collocation of this display drive apparatus 10 and notebook computer for example will produce the problem of vertical bar line when start.Please refer to Fig. 2, it is the timing diagram of each voltage signal, system signal and the system data of display drive apparatus 10, and as seen from the figure, the sequential of voltage signal VDDD, VDDA, VEEG and VDDG is VDDD → VDDA → VEEG → VDDG in regular turn.As shown in Figure 2 before system signal and system data produce as yet, voltage signal VDDD, VDDA, VEEG and VDDG have made display panel 17 be driven and have begun to show the data of being received, but this moment, display panel 17 receptions and data presented were not to be come by system, therefore but mixed and disorderly and irregular signal has produced the phenomenon of vertical bar line.
Fig. 3 is another kind of existing display drive apparatus 30, can be used for solving the vertical bar line phenomenon that above-mentioned display drive apparatus 10 produces.Display drive apparatus 30 includes and postpones initialization circuit 31, hyperchannel pulse-width modulation circuit 33 and display driver 35, and wherein display driver 35 is to be used to provide signal to drive display panel 37.Display drive apparatus 30 can use and postpone initialization circuit 31 and hyperchannel pulse-width modulation circuit 33 and be VEEG → VDDG → VDDA with direct adjustment voltage signal VDDA, VEEG and VDDG three's sequential precedence relationship, so just can avoid the phenomenon of generation vertical bar line when panel receives mixed and disorderly irregular data-signal.
Though can using, display drive apparatus 30 postpones initialization circuit 31 is directly adjusted voltage signal VDDA, VEEG and VDDG three with hyperchannel pulse-width modulation circuit 33 sequential precedence relationship, to reach the purpose of the phenomenon of eliminating the vertical bar line, but because of its cost is too high, real is not a good solution.
Summary of the invention
Purpose of the present invention is promptly providing a kind of display drive apparatus, and it can solve display panel and the system of notebook computer for example and arrange in pairs or groups and produce the phenomenon of vertical bar line and save cost simultaneously when start, and above-mentioned again display panel can be display panels.
This display drive apparatus includes display driver, single channel pulse-width modulation circuit, step-up/step-down circuit and delay circuit.Wherein, display driver is in order to drive display panel.In one embodiment, display driver comprises scanner driver and data driver.It provides operating voltage by logic voltage signal and in order to first voltage signal to be provided single channel pulse-width modulation circuit, and the operating voltage of first voltage signal when being used to provide the pixel of this display panel to open.Step-up/step-down circuit is electrically connected between single channel pulse-width modulation circuit and the display driver, this step-up/step-down circuit provides second voltage signal and tertiary voltage signal according to first voltage signal, wherein second voltage signal is used to open the voltage signal of the pixel of display panel, and the tertiary voltage signal is used to close the voltage signal of the pixel of display panel.
In addition, delay circuit is electrically connected between single channel pulse-width modulation circuit and the display driver, provide the 4th voltage signal in order to postpone first voltage signal, wherein the 4th voltage signal is the delay form of this first voltage signal, and the sequential of the 4th voltage signal is later than second voltage signal and tertiary voltage signal.In one embodiment, delay circuit can resistance and electric capacity composition.
A further object of the present invention provides a kind of display, and it can solve its display panel and produce the phenomenon of vertical bar line and saving cost simultaneously when for example the system of notebook computer arranges in pairs or groups in start, and aforesaid again display panel can be display panels.This display includes display panel and above-mentioned display drive apparatus, wherein the system data exported in order to display system of display panel.
Another purpose of the present invention provides a kind of driving method of display, wherein the collocation of display and system is used, and display comprises the display panel of the system data of exporting in order to display system, and this driving method is to be used to solve display panel produces the vertical bar line when for example the system of notebook computer arranges in pairs or groups in start with one phenomenon.Aforesaid again display panel can be display panels.
This driving method at first provides logic voltage signal to display, and wherein logic voltage signal is used to provide the voltage of display logic operation.Then, display provides first voltage signal, second voltage signal and tertiary voltage signal by the logic voltage signal power supply, operating voltage when wherein first voltage signal is used to provide the pixel of display panel to open, second voltage signal is used to open the pixel of display panel, and the tertiary voltage signal is used to close the pixel of display panel.Then, postpone first voltage signal to produce the 4th voltage signal, wherein the 4th voltage signal is the delay form of first voltage signal, and its sequential is later than second voltage signal and tertiary voltage signal.At last, utilize second voltage signal, tertiary voltage signal and the 4th voltage signal to drive display panel.
State with other purposes, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and conjunction with figs. is described in detail below.
Description of drawings
Fig. 1 is a kind of calcspar of existing display drive apparatus.
Fig. 2 is the timing diagram of each voltage signal in the display drive apparatus shown in Figure 1.
Fig. 3 is the calcspar of another kind of existing display drive apparatus.
Fig. 4 is the calcspar of display drive apparatus one embodiment of the present invention.
Fig. 5 is the timing diagram of each voltage signal in the display drive apparatus shown in Figure 4.
Fig. 6 is the process flow diagram of display drive method of the present invention.
Embodiment
For the purpose of the convenient explanation of embodiment, following display is example with the LCD, and display panel is example with the display panels, and system is example with the computer system.
Fig. 4 is the calcspar of display drive apparatus one embodiment of the present invention, and Fig. 5 is the timing diagram of each voltage signal in the display drive apparatus shown in Figure 4.Please also refer to Fig. 4 and Fig. 5, display drive apparatus 40 includes single channel pulse-width modulation circuit 41, delay circuit 42, step-up/step-down circuit 43 and display driver 45, and wherein display driver 45 is electrically connected to display panels 47.In one embodiment, display driver 45 comprises scanner driver and data driver (not shown), and it is respectively in order to drive scan wiring and the data wiring on the display panels 47.In addition, LCD comprises display drive apparatus 40 and display panels 47.
A plurality of voltage signals are arranged in the display drive apparatus 40, include logic voltage signal VDDD, the first voltage signal VDDA, the second voltage signal VDDG, tertiary voltage signal VEEG and the 4th voltage signal VDDA '.Wherein, required supply voltage when logic voltage signal VDDD is used to provide single channel pulse-width modulation circuit 41 with operation such as display driver 45 grades, operating voltage when the first voltage signal VDDA is used to provide the pixel of display panels 47 to open, the pixel that the second voltage signal VDDG is used to open display panels 47, tertiary voltage signal VEEG is used to close the pixel of display panels 47, and the 4th voltage signal VDDA ' is the delay form of the first voltage signal VDDA again.
In one embodiment, the open and close of the pixel of display panels 47 are controlled by a thin film transistor (TFT), so voltage signal VDDG and VEEG input to the grid of thin film transistor (TFT).When pixel was opened (being that thin film transistor (TFT) is opened), voltage signal VDDA inputed to pixel capacitance via the leakage/source electrode of thin film transistor (TFT), and voltage signal VDDA is the rotation of reference potential operation liquid crystal molecule with the common voltage.
Single channel pulse-width modulation circuit 41 exportable voltage signal VDDA are to delay circuit 42 and step-up/step-down circuit 43.Delay circuit 42 generally is made up of resistance and electric capacity, and delay circuit 42 postpones a period of time and output voltage signal VDDA ' with voltage signal VDDA.Step-up/step-down circuit 43 can receive from the voltage signal VDDA of single channel pulse-width modulation circuit 41 and convert it to voltage signal VDDG and VEEG exports display driver 45 again to again.Display driver 45 utilizes these voltage signals VDDG, VEEG and VDDA ' to drive display panels 47 at last.
Because voltage signal VDDD, VDDG, VEEG and VDDA are after the above-mentioned operation of process, promptly as shown in Figure 5 voltage signal VDDA delay a period of time is become voltage signal VDDA ', therefore the sequential of these voltage signals becomes VDDD → VEEG → VDDG → VDDA ' from VDDD → VDDA → VEEG → VDDG, so can avoid display panels 47 start moment because of receiving the phenomenon that mixed and disorderly and irregular signal produces the vertical bar line.
Fig. 6 is the process flow diagram of display drive method of the present invention.Please refer to Fig. 6, this driving method at first is to provide logic voltage signal VDDD to LCD in step S61, and wherein logic voltage signal VDDD is used to provide the voltage of LCD logical operation.Then, LCD provides the first voltage signal VDDA, the second voltage signal VDDG and tertiary voltage signal VEEG by logic voltage signal VDDD power supply in step S63, operating voltage when wherein the first voltage signal VDDA is used to provide the pixel of display panels to open, the pixel that the second voltage signal VDDG is used to open display panels, and tertiary voltage signal VEEG is used to close the pixel of display panels.Then, in step S65, postpone the first voltage signal VDDA to produce the 4th voltage signal VDDA ', wherein the 4th voltage signal VDDA ' is the delay form of the first voltage signal VDDA, and its sequential is later than the second voltage signal VDDG and tertiary voltage signal VEEG.At last, in step S67, utilize the second voltage signal VDDG, tertiary voltage signal VEEG and the 4th voltage signal VDDA ' to drive display panels.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those of ordinary skills, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so the present invention's protection domain is when with being as the criterion that claim was defined.
Claims (13)
1. display drive apparatus, it is in order to drive the display panel with system collocation, and this display drive apparatus comprises:
One display driver is in order to drive this display panel;
One single channel pulse-width modulation circuit, it provides operating voltage by a logic voltage signal and in order to one first voltage signal to be provided, the operating voltage when wherein this first voltage signal is used to provide the pixel of this display panel to open;
One step-up/step-down circuit, be electrically connected between this single channel pulse-width modulation circuit and this display driver, this step-up/step-down circuit provides one second voltage signal and a tertiary voltage signal according to this first voltage signal, this second voltage signal pixel of being used to open this display panel wherein, and this tertiary voltage signal is used to close the pixel of this display panel; And
One delay circuit, be electrically connected between this single channel pulse-width modulation circuit and this display driver, provide one the 4th voltage signal in order to postpone this first voltage signal, wherein the 4th voltage signal is the delay form of this first voltage signal, and the sequential of the 4th voltage signal is later than this second voltage signal and this tertiary voltage signal.
2. display drive apparatus as claimed in claim 1 is characterized in that, this system is a notebook computer.
3. display drive apparatus as claimed in claim 1 is characterized in that, this display panel is a display panels.
4. display drive apparatus as claimed in claim 1 is characterized in that, this deferred telegram routing resistance and electric capacity are formed.
5. display drive apparatus as claimed in claim 1 is characterized in that, this display driver comprises an one scan driver and a data driver.
6. display, itself and system collocation are used, and this display comprises:
One display panel is in order to the system data that shows that this system exports;
One display driver is in order to drive this display panel;
One single channel pulse-width modulation circuit, it provides operating voltage by a logic voltage signal and in order to one first voltage signal to be provided, the operating voltage when wherein this first voltage signal is used to provide the pixel of this display panel to open;
One step-up/step-down circuit, be electrically connected between this single channel pulse-width modulation circuit and this display driver, this step-up/step-down circuit provides one second voltage signal and a tertiary voltage signal according to this first voltage signal, this second voltage signal pixel of being used to open this display panel wherein, and this tertiary voltage signal is used to close the pixel of this display panel; And
One delay circuit, be electrically connected between this single channel pulse-width modulation circuit and this display driver, provide one the 4th voltage signal in order to postpone this first voltage signal, wherein the 4th voltage signal is the delay form of this first voltage signal, and the sequential of the 4th voltage signal is later than this second voltage signal and this tertiary voltage signal.
7. display as claimed in claim 6 is characterized in that, this system is a notebook computer.
8. display as claimed in claim 6 is characterized in that, this display panel is a display panels.
9. display as claimed in claim 6 is characterized in that, this deferred telegram routing resistance and electric capacity are formed.
10. display as claimed in claim 6 is characterized in that, this display driver comprises an one scan driver and a data driver.
11. the driving method of a display, wherein the collocation of this display and a system is used, and this display comprises that the driving method of this display comprises in order to show a display panel of the system data that this system exports:
Provide a logic voltage signal to this display, wherein this logic voltage signal is used to provide the voltage of this display logic operation;
This display provides one first voltage signal, one second voltage signal and a tertiary voltage signal by this logic voltage signal power supply, operating voltage when wherein this first voltage signal is used to provide the pixel of this display panel to open, this second voltage signal is used to open the pixel of this display panel, and this tertiary voltage signal is used to close the pixel of this display panel;
Postpone this first voltage signal to produce one the 4th voltage signal, wherein the 4th voltage signal is the delay form of this first voltage signal, and the sequential of the 4th voltage signal is later than this second voltage signal and this tertiary voltage signal; And
Utilize this second voltage signal, this tertiary voltage signal and the 4th voltage signal to drive this display panel.
12. the driving method of display as claimed in claim 11 is characterized in that, this system is a notebook computer.
13. the driving method of display as claimed in claim 11 is characterized in that, this display unit is a display panels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101057197A CN100533520C (en) | 2006-07-17 | 2006-07-17 | Display driving apparatus, display apparatus and driving method for display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101057197A CN100533520C (en) | 2006-07-17 | 2006-07-17 | Display driving apparatus, display apparatus and driving method for display apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101110186A true CN101110186A (en) | 2008-01-23 |
| CN100533520C CN100533520C (en) | 2009-08-26 |
Family
ID=39042244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101057197A Expired - Fee Related CN100533520C (en) | 2006-07-17 | 2006-07-17 | Display driving apparatus, display apparatus and driving method for display apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100533520C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526678B (en) * | 2008-03-07 | 2011-12-21 | 群康科技(深圳)有限公司 | Power supply circuit and a liquid crystal display device using same |
| CN102983744A (en) * | 2012-12-25 | 2013-03-20 | 深圳市华星光电技术有限公司 | DC/DC module for LCD driving circuit |
| CN102044223B (en) * | 2009-10-15 | 2013-07-17 | 瀚宇彩晶股份有限公司 | Liquid crystal display and driving method thereof |
| WO2019000903A1 (en) * | 2017-06-30 | 2019-01-03 | 京东方科技集团股份有限公司 | Display device, power supply circuit and power supply method |
-
2006
- 2006-07-17 CN CNB2006101057197A patent/CN100533520C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526678B (en) * | 2008-03-07 | 2011-12-21 | 群康科技(深圳)有限公司 | Power supply circuit and a liquid crystal display device using same |
| CN102044223B (en) * | 2009-10-15 | 2013-07-17 | 瀚宇彩晶股份有限公司 | Liquid crystal display and driving method thereof |
| CN102983744A (en) * | 2012-12-25 | 2013-03-20 | 深圳市华星光电技术有限公司 | DC/DC module for LCD driving circuit |
| WO2019000903A1 (en) * | 2017-06-30 | 2019-01-03 | 京东方科技集团股份有限公司 | Display device, power supply circuit and power supply method |
| US11289020B2 (en) | 2017-06-30 | 2022-03-29 | Boe Technology Group Co., Ltd. | Display device, power supply circuit and power supply method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100533520C (en) | 2009-08-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100511378C (en) | Driving apparatus of backlight and method of driving backlight using the same | |
| JP4975155B2 (en) | Display device and gate pulse modulation control method thereof | |
| CN100543530C (en) | Liquid crystal indicator and display packing thereof | |
| CN101320171B (en) | LCD and method for improving power-off ghost | |
| CN103325353B (en) | For the level shifter of liquid crystal display | |
| CN103680636B (en) | Shift register cell, gate driver circuit and display device | |
| CN102800288A (en) | Electronic device system | |
| CN101350180A (en) | Driving device, display apparatus having the same and method of driving the display apparatus | |
| US8054262B2 (en) | Circuit for stabilizing common voltage of a liquid crystal display device | |
| CN100520899C (en) | Liquid crystal display device and method of driving the same | |
| CN104078016A (en) | Time sequence control method, time sequence controller and display device | |
| TW201003627A (en) | Discharge circuit and display device with the same | |
| CN102968970B (en) | Driving device and driving method for display panel | |
| CN100533520C (en) | Display driving apparatus, display apparatus and driving method for display apparatus | |
| US7764257B2 (en) | Apparatus and method for controlling gate voltage of liquid crystal display | |
| CN101359109A (en) | Pixel, display panel and drive method thereof | |
| KR101868606B1 (en) | Shift register and display device including the same | |
| WO2019061729A1 (en) | Display device and drive method therefor | |
| US7800599B2 (en) | Display driving device, display device and method for driving display device | |
| US11100876B2 (en) | Latch circuit based on thin-film transistor, pixel circuit and driving method, display apparatus | |
| US8416182B2 (en) | Apparatus and method for driving a liquid crystal display device for reducing ripple noise | |
| KR101957296B1 (en) | Apparatus and Method for providing power, and Liquid Crystal Display Device having thereof | |
| KR20080004851A (en) | Liquid crystal display device | |
| CN203950534U (en) | Image element circuit and display device | |
| CN101425268A (en) | Low power drive method for image display apparatus and driving signal generating 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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090826 Termination date: 20200717 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |