CN104538003A - Drive method for display panel, and display device - Google Patents
Drive method for display panel, and display device Download PDFInfo
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- CN104538003A CN104538003A CN201510033276.4A CN201510033276A CN104538003A CN 104538003 A CN104538003 A CN 104538003A CN 201510033276 A CN201510033276 A CN 201510033276A CN 104538003 A CN104538003 A CN 104538003A
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Abstract
The invention provides a drive method for a display panel, and a display device. The drive method for the display panel is applied to driving the display device which comprises the display panel, and further comprises a time schedule controller, a power supply management chip and a gate electrode driver for providing a gate electrode drive signal for the display panel. The drive method comprises the following steps: sending a corresponding control signal to the power supply management chip according to the screening frequency of a current drive mode through the time schedule controller; sending a corresponding high electric-level signal and a corresponding low electric-level signal to the gate electrode driver according to the control signal through the power supply management chip; and along with the reduction of the scanning frequency, reducing voltage of the corresponding high electric-level signal, and reducing an absolute value of voltage of the corresponding low electric-level signal. When the drive method is used for driving the display panel in a frequency-reducing mode, the power consumption of the liquid crystal display panel is reduced by reducing the voltage of the high electric-level signal and the voltage of the low electric-level signal.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of driving method and display device of display panel.
Background technology
When display panels adopts metal oxide thin-film transistor, due to IGZO (IndiumGallium Zinc Oxide, indium gallium zinc oxide) TFT (Thin Film Transistor, thin film transistor (TFT)) and a-Si (amorphous silicon) TFT, LTPS (Low Temperature Poly-silicon, low-temperature polysilicon silicon technology) TFT compares leakage current only less than 1pA (skin peace), therefore when showing tableaux, even if the driving frequency of display panels has reduced to 1-5Hz by original 30-60Hz, although decrease the driving number of times to TFT, the orientation that also can maintain liquid crystal molecule does not affect picture, frequency reducing drives because the number of times of unit interval interscan reduces, power consumption can reduce.
Frequency reducing for the display panels adopting IGZO TFT drives, during to show tableaux, frame frequency is for 1Hz, picture 1s upgrades once, because the duration of charging is sufficient, it is lower that the magnitude of voltage of high level signal VGH and the magnitude of voltage of low level signal VGL can fall, and VGH, the electric current of VGL is determined by the load of display panels own, do not change with the change of VGH, VGL voltage, it is lower that power consumption also can be fallen.The reduction of the reduction of the magnitude of voltage of high level signal VGH and the magnitude of voltage of low level signal VGL also can make public electrode voltages Vcom change, because the electric current of Vcom own is less, can not have an impact to power consumption.But in the driving method of existing display panels, when display tableaux and display dynamic menu, the magnitude of voltage of different high level signals and the magnitude of voltage of low level signal can not be selected by corresponding corresponding drive pattern, thus can not better reduce the power consumption of liquid crystal indicator.
Summary of the invention
Fundamental purpose of the present invention is the driving method and the display device that provide a kind of display panel, solve in prior art and show tableaux with when showing dynamic menu, the magnitude of voltage of different high level signals and the magnitude of voltage of low level signal can not be selected by corresponding corresponding drive pattern, thus can not better reduce the problem of the power consumption of liquid crystal indicator.
In order to achieve the above object, the invention provides a kind of driving method of display panel, the display panel comprised for driving display device, described display device also comprises time schedule controller, power management chip and provides the gate drivers of gate drive signal to described display panel, and described driving method comprises:
Described time schedule controller sends corresponding control signal according to the sweep frequency of current drive pattern to described power management chip;
Described power management chip sends corresponding high level signal and corresponding low level signal according to this control signal to described gate drivers;
Along with the reduction of described sweep frequency, the voltage of corresponding high level signal reduces, and the absolute value of the voltage of corresponding low level signal reduces.
During enforcement, described display panel is display panels.
During enforcement, described display panel adopts IGZO thin film transistor (TFT).
During enforcement, when described sweep frequency is 60 hertz, described high level signal is 15V voltage signal, and described low level signal is-10V voltage signal;
When described sweep frequency is 5 hertz, described high level signal is 12V voltage signal, and described low level signal is-7V voltage signal;
When described sweep frequency is 2 hertz, described high level signal is 11V voltage signal, and described low level signal is-6.5V voltage signal;
When described sweep frequency is 1 hertz, described high level signal is 10V voltage signal, and described low level signal is-6V voltage signal.
During enforcement, described display device also comprises processor;
Described driving method also comprised before described time schedule controller sends corresponding control signal step according to the sweep frequency of current drive pattern to power management chip:
Described processor exports drive pattern to described time schedule controller and selects signal;
Described time schedule controller selects signal to determine current drive pattern according to this drive pattern.
Present invention also offers a kind of display device, comprise display panel, time schedule controller, power management chip and the gate drivers of gate drive signal is provided to described display panel;
Described time schedule controller, sends corresponding control signal for the sweep frequency according to current drive pattern to described power management chip;
Described power management chip, for sending corresponding high level signal and corresponding low level signal according to this control signal to described gate drivers;
Along with the reduction of described sweep frequency, the voltage of corresponding high level signal reduces, and the absolute value of the voltage of corresponding low level signal reduces.
During enforcement, described display panel is display panels.
During enforcement, described display panel adopts IGZO thin film transistor (TFT).
During enforcement, when described sweep frequency is 60 hertz, described high level signal is 15V voltage signal, and described low level signal is-10V voltage signal;
When described sweep frequency is 5 hertz, described high level signal is 12V voltage signal, and described low level signal is-7V voltage signal;
When described sweep frequency is 2 hertz, described high level signal is 11V voltage signal, and described low level signal is-6.5V voltage signal;
When described sweep frequency is 1 hertz, described high level signal is 10V voltage signal, and described low level signal is-6V voltage signal.
During enforcement, described display device also comprises processor;
Described processor, selects signal for exporting drive pattern to described time schedule controller;
Described time schedule controller, also for selecting signal to determine current drive pattern according to this drive pattern.
Compared with prior art, the driving method of display panel of the present invention and display device, when adopting frequency reducing to drive, by reducing the voltage of high level signal and the voltage of low level signal, thus reduce the power consumption of display panels.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the driving method of display panel described in the embodiment of the present invention;
Fig. 2 is the structured flowchart of the display device described in the embodiment of the present invention;
Fig. 3 is the structural drawing of a specific embodiment of display device of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The driving method of the display panel described in the embodiment of the present invention, the display panel comprised for driving display device, described display device also comprises time schedule controller, power management chip and provides the gate drivers of gate drive signal to described display panel, as shown in Figure 1, described driving method comprises:
Step 11: described time schedule controller sends corresponding control signal according to the sweep frequency of current drive pattern to described power management chip;
Step 12: described power management chip sends corresponding high level signal and corresponding low level signal according to this control signal to described gate drivers;
Along with the reduction of described sweep frequency, the voltage of corresponding high level signal reduces, and the absolute value of the voltage of corresponding low level signal reduces.
The driving method of the display panel described in the embodiment of the present invention, when adopting frequency reducing to drive, by reducing the voltage of high level signal and the voltage of low level signal, thus reduces the power consumption of display panels.
Preferably, the driving method described in the embodiment of the present invention is applied to display panels, preferred, and described display panel adopts IGZO thin film transistor (TFT).When the driving method described in the embodiment of the present invention is for driving the display panels adopting IGZO thin film transistor (TFT), the prerequisite decline low-power consumption of image display quality can not affected.
Although the driving method of the display panel described in the embodiment of the present invention is preferred for the display panels adopting IGZO thin film transistor (TFT), but the driving method of the display panel described in the embodiment of the present invention also can reach the effect reducing power consumption when being used for the display panel of driving OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) display panel or other types.
In an embodiment of the driving method of display panel of the present invention, when described sweep frequency is 60 hertz, described high level signal is 15V voltage signal, and described low level signal is-10V voltage signal;
When described sweep frequency is 5 hertz, described high level signal is 12V voltage signal, and described low level signal is-7V voltage signal;
When described sweep frequency is 2 hertz, described high level signal is 11V voltage signal, and described low level signal is-6.5V voltage signal;
When described sweep frequency is 1 hertz, described high level signal is 10V voltage signal, and described low level signal is-6V voltage signal.
Concrete, described display device also comprises source electrode driver;
Described driving method also comprises: described power management chip sends corresponding public electrode voltages signal according to this control signal to source electrode driver.
When practical operation, along with the change of the change of the voltage of high level signal and the voltage of low level signal, the voltage of public electrode voltages signal also can along with change, such as in this specific embodiment of the driving method of display panel of the present invention, when described sweep frequency is 60 hertz, described public electrode voltages signal is 3.26V voltage signal; When described sweep frequency is 5 hertz, described public electrode voltages signal is 3.3V voltage signal; When described sweep frequency is 2 hertz, described public electrode voltages signal is 3.28V voltage signal; When described sweep frequency is 1 hertz, described public electrode voltages signal is 3.3V voltage signal.
Concrete, described display device also comprises processor;
Described driving method also comprised before described time schedule controller sends corresponding control signal step according to the sweep frequency of current drive pattern to power management chip:
Described processor exports drive pattern to described time schedule controller and selects signal;
Described time schedule controller selects signal to determine current drive pattern according to this drive pattern.
As shown in Figure 2, the display device described in the embodiment of the present invention, comprises display panel 20, time schedule controller 21, power management chip 22 and provides the gate drivers 23 of gate drive signal to described display panel 20, wherein,
Described time schedule controller 21, sends corresponding control signal Ctrl for the sweep frequency according to current drive pattern to described power management chip 22;
Described power management chip 22, for sending corresponding high level signal VGH and corresponding low level signal VGL according to this control signal Ctrl to described gate drivers 33;
Along with the reduction of described sweep frequency, the voltage of corresponding high level signal VGH reduces, and the absolute value of the voltage of corresponding low level signal VGL reduces.
Display device described in the embodiment of the present invention, when adopting frequency reducing to drive display panel, by reducing the voltage of high level signal and the voltage of low level signal, thus reduces power consumption.
Preferably, the display panel that the display device described in the embodiment of the present invention comprises is display panels, preferred, and described display panel adopts IGZO thin film transistor (TFT).
When the display panel that the display device described in the embodiment of the present invention comprises is the display panels adopting IGZO thin film transistor (TFT), the prerequisite decline low-power consumption of image display quality can not affected.
Although the display panel that the display device described in the embodiment of the present invention comprises is preferably the display panels adopting IGZO thin film transistor (TFT), but the display panel that the display device described in the embodiment of the present invention comprises also can reach the effect reducing power consumption when being the display panel of OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) display panel or other types.
In an embodiment of display device of the present invention, when described sweep frequency is 60 hertz, described high level signal is 15V voltage signal, and described low level signal is-10V voltage signal;
When described sweep frequency is 5 hertz, described high level signal is 12V voltage signal, and described low level signal is-7V voltage signal;
When described sweep frequency is 2 hertz, described high level signal is 11V voltage signal, and described low level signal is-6.5V voltage signal;
When described sweep frequency is 1 hertz, described high level signal is 10V voltage signal, and described low level signal is-6V voltage signal.
Concrete, described display device also comprises the source electrode driver providing data-signal to described display panel;
Described power management chip, also for sending corresponding public electrode voltages signal according to this control signal to source electrode driver.
When practical operation, along with the change of the change of the voltage of high level signal and the voltage of low level signal, the voltage of public electrode voltages signal also can along with change, such as in this embodiment of display panel of the present invention, when described sweep frequency is 60 hertz, described public electrode voltages signal is 3.26V voltage signal; When described sweep frequency is 5 hertz, described public electrode voltages signal is 3.3V voltage signal; When described sweep frequency is 2 hertz, described public electrode voltages signal is 3.28V voltage signal; When described sweep frequency is 1 hertz, described public electrode voltages signal is 3.3V voltage signal.
Concrete, described display device also comprises processor;
Described processor, selects signal for exporting drive pattern to described time schedule controller;
Described time schedule controller, also for selecting signal to determine current drive pattern according to this drive pattern.
Below by a specific embodiment, display device of the present invention is described:
As shown in Figure 3, one specific embodiment of display device of the present invention comprises and adopts the display panels 30 of IGO TFT, processor 31, time schedule controller 32, power management chip 33, provides the gate drivers 34 of gate drive signal to described display panels 30 and provide the source electrode driver 35 of data-signal to described display panels 30, wherein
Described processor 31, selects signal MS for exporting drive pattern to described time schedule controller 32;
Described time schedule controller 32, for selecting signal to determine current drive pattern according to this drive pattern;
Described time schedule controller 32, also sends corresponding first control signal Ctrl1 and the second control signal Ctrl2 for the sweep frequency according to this current drive pattern to described power management chip 32;
Described power management chip 33, for sending corresponding high level signal VGH and corresponding low level signal VGL according to this first control signal Ctrl1 and the second control signal Ctrl2 to described gate drivers 34;
Described power management chip 33, also for sending corresponding public electrode voltages signal VCOM according to this first control signal Ctrl1 and the second control signal Ctrl2 to described source electrode driver 35;
Along with the reduction of described sweep frequency, the voltage of corresponding high level signal VGH reduces, and the absolute value of the voltage of corresponding low level signal VGL reduces;
Concrete, when described first control signal Ctrl1 and described second control signal Ctrl2 is Binary Zero, and described sweep frequency is 60 hertz, described high level signal VGH is 15V voltage signal, described low level signal VGL is-10V voltage signal, and described public electrode voltages signal VCOM is 3.2V voltage signal;
When described first control signal Ctrl1 and described second control signal Ctrl2 is binary one, described sweep frequency is 5 hertz, described high level signal VGH is 12V voltage signal, described low level signal VGL is-7V voltage signal, and described public electrode voltages signal VCOM is 3.26V voltage signal;
When described first control signal Ctrl1 is binary one, described second control signal Ctrl2 is Binary Zero, described sweep frequency is 2 hertz, described high level signal VGH is 11V voltage signal, described low level signal VGL is-6.5V voltage signal, and described public electrode voltages signal VCOM is 3.28V voltage signal;
When described first control signal Ctrl1 is Binary Zero, described second control signal Ctrl2 is binary one, described sweep frequency is 1 hertz, described high level signal is 10V voltage signal, described low level signal is-6V voltage signal, and described public electrode voltages signal VCOM is 3.3V voltage signal.
This specific embodiment of display device of the present invention, when adopting frequency reducing to drive, by reducing the voltage of high level signal and the voltage of low level signal, thus reduces the power consumption of display panels.Such as, when showing tableaux, sweep frequency can be adopted to be 1 hertz, 2 hertz or 5hz, when showing dynamic menu, sweep frequency can be adopted to be 60 hertz, and according to the different voltage of high level signal of the same selection of sweep frequency and the voltage of different low level signals, when sweep frequency is low, the voltage of corresponding high level signal and the voltage of corresponding low level signal also low, thus can power consumption be reduced.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. the driving method of a display panel, the display panel comprised for driving display device, described display device also comprises time schedule controller, power management chip and provides the gate drivers of gate drive signal to described display panel, and it is characterized in that, described driving method comprises:
Described time schedule controller sends corresponding control signal according to the sweep frequency of current drive pattern to described power management chip;
Described power management chip sends corresponding high level signal and corresponding low level signal according to this control signal to described gate drivers;
Along with the reduction of described sweep frequency, the voltage of corresponding high level signal reduces, and the absolute value of the voltage of corresponding low level signal reduces.
2. the driving method of display panel as claimed in claim 1, it is characterized in that, described display panel is display panels.
3. the driving method of display panel as claimed in claim 1 or 2, is characterized in that, described display panel adopts IGZO thin film transistor (TFT).
4. the driving method of display panel as claimed in claim 1 or 2, it is characterized in that, when described sweep frequency is 60 hertz, described high level signal is 15V voltage signal, and described low level signal is-10V voltage signal;
When described sweep frequency is 5 hertz, described high level signal is 12V voltage signal, and described low level signal is-7V voltage signal;
When described sweep frequency is 2 hertz, described high level signal is 11V voltage signal, and described low level signal is-6.5V voltage signal;
When described sweep frequency is 1 hertz, described high level signal is 10V voltage signal, and described low level signal is-6V voltage signal.
5. the driving method of display panel as claimed in claim 1 or 2, it is characterized in that, described display device also comprises processor;
Described driving method also comprised before described time schedule controller sends corresponding control signal step according to the sweep frequency of current drive pattern to power management chip:
Described processor exports drive pattern to described time schedule controller and selects signal;
Described time schedule controller selects signal to determine current drive pattern according to this drive pattern.
6. a display device, comprises display panel, time schedule controller, power management chip and provides the gate drivers of gate drive signal to described display panel, it is characterized in that,
Described time schedule controller, sends corresponding control signal for the sweep frequency according to current drive pattern to described power management chip;
Described power management chip, for sending corresponding high level signal and corresponding low level signal according to this control signal to described gate drivers;
Along with the reduction of described sweep frequency, the voltage of corresponding high level signal reduces, and the absolute value of the voltage of corresponding low level signal reduces.
7. display device as claimed in claim 6, it is characterized in that, described display panel is display panels.
8. display device as claimed in claims 6 or 7, is characterized in that, described display panel adopts IGZO thin film transistor (TFT).
9. display device as claimed in claims 6 or 7, it is characterized in that, when described sweep frequency is 60 hertz, described high level signal is 15V voltage signal, and described low level signal is-10V voltage signal;
When described sweep frequency is 5 hertz, described high level signal is 12V voltage signal, and described low level signal is-7V voltage signal;
When described sweep frequency is 2 hertz, described high level signal is 11V voltage signal, and described low level signal is-6.5V voltage signal;
When described sweep frequency is 1 hertz, described high level signal is 10V voltage signal, and described low level signal is-6V voltage signal.
10. display device as claimed in claims 6 or 7, it is characterized in that, described display device also comprises processor;
Described processor, selects signal for exporting drive pattern to described time schedule controller;
Described time schedule controller, also for selecting signal to determine current drive pattern according to this drive pattern.
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| CN201510033276.4A CN104538003A (en) | 2015-01-22 | 2015-01-22 | Drive method for display panel, and display device |
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| CN201510033276.4A CN104538003A (en) | 2015-01-22 | 2015-01-22 | Drive method for display panel, and display device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105654890A (en) * | 2016-02-04 | 2016-06-08 | 友达光电股份有限公司 | Display device and driving method thereof |
| CN107967906A (en) * | 2018-01-15 | 2018-04-27 | 南京熊猫电子制造有限公司 | A kind of liquid crystal display based on reverse electrode drive circuit |
| CN109256075A (en) * | 2017-07-13 | 2019-01-22 | 昆山国显光电有限公司 | Display screen power control method, device, storage medium and electronic equipment |
| CN111223453A (en) * | 2020-03-18 | 2020-06-02 | 京东方科技集团股份有限公司 | Power supply module and display device |
| WO2021007968A1 (en) * | 2019-07-18 | 2021-01-21 | 武汉华星光电半导体显示技术有限公司 | Display device, and power supply management chip for display device |
| TWI736301B (en) * | 2019-05-31 | 2021-08-11 | 矽創電子股份有限公司 | Circuit and method for driving display panel |
| CN114648967A (en) * | 2022-03-16 | 2022-06-21 | Tcl华星光电技术有限公司 | Liquid crystal display panel and display device |
| CN114694579A (en) * | 2022-03-18 | 2022-07-01 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| WO2022266981A1 (en) * | 2021-06-25 | 2022-12-29 | 京东方科技集团股份有限公司 | Touch display apparatus and method for operating touch display apparatus |
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- 2015-01-22 CN CN201510033276.4A patent/CN104538003A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105654890B (en) * | 2016-02-04 | 2018-12-11 | 友达光电股份有限公司 | Display device and driving method thereof |
| US10332477B2 (en) | 2016-02-04 | 2019-06-25 | Au Optronics Corporation | Display device and driving method thereof |
| CN105654890A (en) * | 2016-02-04 | 2016-06-08 | 友达光电股份有限公司 | Display device and driving method thereof |
| CN109256075A (en) * | 2017-07-13 | 2019-01-22 | 昆山国显光电有限公司 | Display screen power control method, device, storage medium and electronic equipment |
| US11282908B2 (en) | 2017-07-13 | 2022-03-22 | Kunshan Go-Visionox Opto-Electronics Co., Ltd. | Control methods and control devices for display power supply |
| CN107967906A (en) * | 2018-01-15 | 2018-04-27 | 南京熊猫电子制造有限公司 | A kind of liquid crystal display based on reverse electrode drive circuit |
| TWI736301B (en) * | 2019-05-31 | 2021-08-11 | 矽創電子股份有限公司 | Circuit and method for driving display panel |
| WO2021007968A1 (en) * | 2019-07-18 | 2021-01-21 | 武汉华星光电半导体显示技术有限公司 | Display device, and power supply management chip for display device |
| US11386824B2 (en) | 2019-07-18 | 2022-07-12 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Display device and power management chip for the same |
| CN111223453A (en) * | 2020-03-18 | 2020-06-02 | 京东方科技集团股份有限公司 | Power supply module and display device |
| WO2022266981A1 (en) * | 2021-06-25 | 2022-12-29 | 京东方科技集团股份有限公司 | Touch display apparatus and method for operating touch display apparatus |
| CN114648967A (en) * | 2022-03-16 | 2022-06-21 | Tcl华星光电技术有限公司 | Liquid crystal display panel and display device |
| CN114694579A (en) * | 2022-03-18 | 2022-07-01 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN114694579B (en) * | 2022-03-18 | 2023-10-31 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
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Application publication date: 20150422 |