WO2018170984A1 - 一种显示面板的驱动方法、时序控制器及液晶显示器 - Google Patents

一种显示面板的驱动方法、时序控制器及液晶显示器 Download PDF

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Publication number
WO2018170984A1
WO2018170984A1 PCT/CN2017/081238 CN2017081238W WO2018170984A1 WO 2018170984 A1 WO2018170984 A1 WO 2018170984A1 CN 2017081238 W CN2017081238 W CN 2017081238W WO 2018170984 A1 WO2018170984 A1 WO 2018170984A1
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Prior art keywords
frequency
source driver
timing controller
picture
display
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Application number
PCT/CN2017/081238
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English (en)
French (fr)
Inventor
吴宇
王磊
Original Assignee
深圳市华星光电技术有限公司
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Filing date
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to KR1020197030115A priority Critical patent/KR102266045B1/ko
Priority to EP17901758.7A priority patent/EP3605517A4/en
Priority to JP2019551314A priority patent/JP2020511692A/ja
Priority to US15/533,015 priority patent/US10192506B2/en
Publication of WO2018170984A1 publication Critical patent/WO2018170984A1/zh

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/18—Timing circuits for raster scan displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0278—Details of driving circuits arranged to drive both scan and data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/023—Power management, e.g. power saving using energy recovery or conservation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/12—Frame memory handling
    • G09G2360/121—Frame memory handling using a cache memory

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a driving method of a display panel, a timing controller, and a liquid crystal display.
  • TFT liquid crystal display uses source driver (Source Driver) provides a driving voltage corresponding to the screen to be displayed to the data line to drive the display panel to display an image.
  • Source Driver provides a driving voltage corresponding to the screen to be displayed to the data line to drive the display panel to display an image.
  • the liquid crystal display needs to display a reloaded picture, that is, the power consumption of the source driver is too large when the reloaded picture is driven, at this time, the output power consumption required for the source driver to form and maintain the driving voltage becomes large.
  • the switching frequency of the high and low voltage changes of the data line is faster, resulting in a larger heat generation. If the heat dissipation measures are not good, the temperature will rise slowly and affect the display quality of the product.
  • the invention provides a driving method of a display panel, a timing controller and a liquid crystal display, which can reduce the output power consumption of the source driver when displaying a heavy load picture and avoid the temperature increase and affect the display quality.
  • a first aspect of the present invention provides a driving method of a display panel, including:
  • the timing controller When detecting that the picture frame to be displayed is a reloaded picture, the timing controller switches the operating frequency from the first frequency to the second frequency;
  • the timing controller outputs a timing control signal to the source driver at the second frequency, so that the source driver receives the timing control signal and outputs a driving signal with a low frequency to drive the display panel display Overloading the picture;
  • the first frequency is higher than the second frequency
  • the reloading screen is: when the timing controller controls the source driver to use the first frequency as the operating frequency to drive display of the frame to be displayed, the power consumption of the source driver exceeds a set power consumption.
  • the value of the picture frame to be displayed is a reloaded picture.
  • a second aspect of the present invention provides a timing controller for a display panel, including:
  • control circuit configured to output a first frequency switching indication when detecting that the picture frame to be displayed is a reloaded picture
  • a signal generating circuit coupled to the control circuit, configured to switch an operating frequency from a first frequency to a second frequency according to the first frequency switching instruction, and output a timing control signal to the source driver at the second frequency, Driving the display panel to display the reloaded screen by causing the source driver to receive the timing control signal and outputting a frequency lower than a driving signal;
  • the first frequency is higher than the second frequency
  • the reloading screen is: when the timing controller controls the source driver to use the first frequency as the operating frequency to drive display of the frame to be displayed, the power consumption of the source driver exceeds a set power consumption.
  • the value of the picture frame to be displayed is a reloaded picture.
  • a third aspect of the invention provides a liquid crystal display comprising:
  • timing controller for outputting a timing control signal
  • a display driving circuit including a source driver and a gate driver, configured to receive the timing control signal, and the source driver generates a data driving signal according to the timing control signal, and the gate driver generates a scan driving signal;
  • the liquid crystal display panel includes a plurality of data lines, scan lines and a plurality of pixel units, the scan lines receive the scan driving signals, and the data lines receive the data driving signals to control corresponding pixel units to perform display;
  • timing controller is the timing controller described above;
  • the signal generating circuit is specifically configured to switch an operating frequency from a first frequency to a second frequency at a switching moment of an adjacent frame
  • the control circuit is further configured to output a second frequency switching instruction when detecting that the picture frame to be displayed is a non-overload picture
  • the signal generating circuit is further configured to switch the operating frequency from the second frequency back to the first frequency according to the second frequency switching indication, and output a timing control signal to the source driver at the first frequency, so that the source After receiving the timing control signal, the pole driver outputs a corresponding driving signal to drive the display panel to display the non-overloaded screen.
  • the timing controller reduces the operating frequency from the first frequency to the second frequency when detecting the reloaded picture to output the timing control signal of the second frequency, so that the source driver pair receiving the timing control signal thereof is received.
  • the frequency of the driving signal outputted by the display panel is lowered, thereby reducing the output power consumption of the source driver when displaying the reloaded picture, and since the frequency of the driving signal is lowered, the temperature rise is prevented to affect the display quality.
  • FIG. 1 is a schematic structural view of an embodiment of a liquid crystal display according to the present invention.
  • FIG. 2 is a schematic structural diagram of the timing controller 110 shown in FIG. 1;
  • FIG. 3 is a partial structural diagram of the liquid crystal display panel 130 shown in FIG. 1 in an application scenario
  • FIG. 4 is a schematic diagram of output waveforms of a display driving circuit when the timing controller 110 adopts different operating frequencies in the application scenario shown in FIG. 3;
  • FIG. 5 is a schematic structural view of another embodiment of a liquid crystal display panel of a liquid crystal display according to the present invention.
  • FIG. 6 is a schematic flow chart of an embodiment of a driving method of a display panel according to the present invention.
  • FIG. 7 is a partial flow chart showing another embodiment of a driving method of a display panel of the present invention.
  • FIG. 1 is a schematic structural diagram of an embodiment of a liquid crystal display according to the present invention
  • FIG. 2 is a schematic structural diagram of a timing controller.
  • the liquid crystal display is specifically TFT LCD Monitor.
  • the liquid crystal display includes a timing controller sequentially connected (Timer Controller, TCON) 110, display drive circuit 120, and liquid crystal display panel 130.
  • the display driving circuit further includes a source driver 122 and a gate driver 123.
  • the timing controller 110 is configured to generate a timing control signal, such as a driver board (AD)
  • a timing control signal such as a driver board (AD)
  • the transmitted image data signal, control signal, and clock signal are converted into data signals, control signals, and clock signals suitable for the display driving circuit 120.
  • the timing controller 110 outputs a corresponding timing control signal to the source driver 122 and the gate driver 123 of the display driving circuit 120, respectively.
  • the display driving circuit 120 specifically receives the timing control signal and generates a driving signal according to the timing control signal.
  • the source driver 122 is configured to store the image data signal of the picture frame to be displayed in the buffer under the control system of the timing controller 110, and convert the image data signal to be output according to the opening of the gate scan signal. Driving voltages into the pixels to drive the data lines in the display panel.
  • the gate driver 123 is configured to receive a control signal output by the timing controller 110, and sequentially output an appropriate switching voltage to the gate line to drive the gate line of the display panel.
  • the liquid crystal display panel 130 is configured to display the frame to be displayed under the driving of the source driver 120 and the gate driver 130.
  • the timing controller 110 includes a control circuit 111 and a signal generating circuit 112 that are connected to each other.
  • the timing controller 110 presets two operating frequencies as the first frequency and the second frequency, respectively.
  • the first frequency is higher than the second frequency, and the first frequency is an operating frequency of the timing controller 110 under normal display, and the second frequency is an operating frequency of the timing controller 110 when the reload screen is displayed.
  • the second frequency can be half of the first frequency.
  • the reload screen is defined as: when the timing controller 110 controls the source driver 122 to display the frame to be displayed by using the first frequency as the operating frequency, and the power consumption of the source driver 122 exceeds the set power consumption value,
  • the picture frame to be displayed is a reloaded picture.
  • the timing controller 110 operates at the first frequency when displaying the normal picture, and switches to the second frequency operation when it is detected that the reload picture is to be displayed.
  • the specific way to achieve the switching of the working frequency is as follows:
  • the control circuit 111 is configured to output a first frequency switching indication when detecting that the picture frame to be displayed is a reload picture. Specifically, when the timing controller 110 receives the data of the picture frame to be displayed, the control circuit 111 compares the data of the picture frame to be displayed with the data of the internally stored reload picture in real time, if it is determined that the two data are similar or If it is the same, it is determined that the to-be-displayed picture is a reloaded picture.
  • the signal generating circuit 112 is configured to switch the operating frequency from the first frequency to the second frequency according to the first frequency switching instruction, and output the timing control signal to the display driving circuit at the second frequency, so that the display driving circuit 120 drives the liquid crystal display panel 130 to display the reloaded screen according to the timing control signal.
  • the signal generation circuit 112 can switch the operating frequency from the first frequency to the second frequency at the switching timing of the adjacent frame (V-blank time, that is, when the previous picture frame of the reloaded picture is displayed).
  • the timing controller 110 Since the second frequency is lower than the first frequency, the timing controller 110 outputs the relevant timing control signal of the reload picture, such as TP1 (data output signal from the source driver to the display panel) to the display driving circuit at the second frequency, STV (gate start signal, that is, the start of the picture frame), CKV (clock signal) and other signals, that is, the frequency of the timing control signal is reduced to the second frequency, so the source driver 122 drives the display of the reload screen
  • the frequency of the driving circuit is lowered (the period of change of the high and low voltages in the driving signal becomes long), thereby reducing the output power consumption of the source display driving circuit, and avoiding the heat generation becoming large due to the high frequency of the voltage change, thereby affecting the display quality.
  • the liquid crystal display panel 130 includes a plurality of data lines 131, scan lines 133, and a plurality of pixel units 132.
  • the data lines 131 and the scan lines 133 may be vertically and horizontally disposed, and the pixel unit 132 and the corresponding A data line 131 and a scan line 133 are connected to receive signals outputted by the data line 131 and the scan line 133, and the pixel unit 132 may include RGB three primary color sub-pixel units.
  • the gate driver 123 outputs a scan driving signal to the scan line 133.
  • the source driver 122 outputs a data driving signal to the data line 131, wherein the first column data line outputs a data signal to the R color pixel unit 132, and the second column data line outputs a data signal to the G color pixel unit 132, and the third column data line A data signal is output to the B color pixel unit 132.
  • the first column of data lines 131 if the light corresponds to a voltage of 14V, the dark corresponds to a voltage of 8v.
  • the timing controller 110 performs driving control at the first frequency, the data line voltage change waveform is as shown in the upper waveform diagram of FIG. 4, and if the timing control signal detects that the picture is a reloaded picture (pattern), it will work. The frequency is reduced to the second frequency.
  • the data line voltage change waveform is as shown in the lower waveform diagram of FIG. 4, and it is apparent that the voltage change frequency of the data line is lowered.
  • the timing controller 110 switches the operating frequency back to the first frequency if it is found to be a normal screen display. details as follows:
  • the control circuit 111 is further configured to: when detecting that the picture frame to be displayed is a non-reloaded picture, output a second frequency switching instruction;
  • the signal generating circuit 112 is further configured to switch the operating frequency from the second frequency to the first frequency according to the second frequency switching indication, and output the timing control signal to the source driver 123 at the first frequency, so that the source After receiving the timing control signal, the pole driver 123 outputs a corresponding driving signal to drive the liquid crystal display panel 130 to display the non-overloaded screen. Specifically, the signal generation circuit 112 can complete the switching of the operating frequency at the switching timing of adjacent frames.
  • the frequency of the driving signal output by the corresponding source driver also returns to normal (as shown in the upper waveform diagram of FIG. 4).
  • the embodiment of the present embodiment not only ensures the dynamic display effect of the normal picture, but also reduces the power consumption of the reloaded picture.
  • control circuit and the signal generating circuit of the timing controller may be in the same chip or implemented by the same circuit, which is not limited herein.
  • the liquid crystal display panel 530 includes an array substrate 531 , a color filter substrate 532 , and a liquid crystal 533 sandwiched between the array substrate 531 and the color filter substrate 532 .
  • the array substrate 531 includes data lines and scan lines disposed vertically and horizontally, and pixel units. Specifically, as shown in FIG. 3, the data lines and the scan lines respectively receive the data driving signals and the scan driving signals output by the display driving circuit 120. The pixel unit is driven for display.
  • timing controller is not necessarily limited to being applied to a liquid crystal display. In other embodiments, it can be applied to other displays that also need to use a source driver to output a driving signal to a data line of a display panel.
  • FIG. 6 is a schematic flow chart of an embodiment of a driving method of a display panel according to the present invention.
  • the present embodiment is applied to the source driving circuit as described in the above embodiment, and the driving method can be performed by the timing controller in the above embodiment.
  • the method specifically includes:
  • the timing controller switches the operating frequency from the first frequency to the second frequency when detecting that the picture frame to be displayed is a reloaded picture.
  • the timing controller compares the data of the picture frame to be displayed with the data of the internally stored reload picture in real time, and determines that the two data are similar or identical, and then determines The picture to be displayed is a reloaded picture.
  • the timing controller outputs a timing control signal to the source driver at the second frequency, so that the source driver receives the timing control signal and outputs a driving signal with a low frequency to drive the display panel display. Reproduce the picture.
  • the first frequency is higher than the second frequency, for example, the second frequency is half of the first frequency.
  • the reloading screen is: when the timing controller controls the source driver to use the first frequency as the operating frequency to drive display of the frame to be displayed, the power consumption of the source driver exceeds a set power consumption.
  • the value of the picture frame to be displayed is a reloaded picture.
  • FIG. 7 is a partial flow chart of another embodiment of a timing control method for a display driving circuit of the present invention.
  • the difference between this embodiment and the previous embodiment is that, after performing the foregoing S601-S602, the method of the embodiment further includes:
  • the timing controller switches the operating frequency from the second frequency to the first frequency when detecting that the picture frame to be displayed is a non-overload picture.
  • the timing controller outputs a timing control signal to the source driver at the first frequency, so that the source driver receives the timing control signal and outputs a corresponding driving signal to drive the display panel display The non-overloaded picture.
  • the timing controller specifically switches the operating frequency from the first frequency at the switching moment of the adjacent frame.
  • the timing controller reduces the operating frequency from the first frequency to the second frequency when detecting the reloaded picture to output the timing control signal of the second frequency, so that the source driver pair receiving the timing control signal thereof is received.
  • the frequency of the driving signal outputted by the display panel is lowered, thereby reducing the output power consumption of the source driver when displaying the reloaded picture, and since the frequency of the driving signal is lowered, the temperature rise is prevented to affect the display quality.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Multimedia (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

一种显示面板的驱动方法、时序控制器及液晶显示器。其中，该方法包括：在检测到待显示画面帧为重载画面时，时序控制器将工作频率从第一频率切换至第二频率（S601）；以第二频率向源极驱动器输出时序控制信号，以使源极驱动器输出频率变低的驱动信号来驱动显示重载画面（S602）；其中，第一频率高于第二频率。通过上述方式，能够降低源极驱动器在显示重载画面时的输出功耗过高且避免温度升高而影响显示质量。

Description

一种显示面板的驱动方法、时序控制器及液晶显示器
【技术领域】
本发明涉及显示技术领域，特别是涉及一种显示面板的驱动方法、时序控制器及液晶显示器。
【背景技术】
目前最常用的液晶显示器为薄膜晶体管（Thin Film Transistor，TFT）液晶显示器。TFT液晶显示器采用源极驱动器（Source Driver）向数据线提供与待显示画面对应的驱动电压，以驱动显示面板显示图像。
然而，若液晶显示器需要显示重载画面，即驱动该重载画面时该源极驱动器的功耗过大，此时，源极驱动器用以形成并维持该驱动电压所需的输出功耗变大，同时，按照一般液晶显示的驱动模式，其数据线的高低电压变化切换频率较快，导致发热变大。若是散热措施不好，温度会缓慢升高，影响产品的显示质量。
【发明内容】
本发明提供一种显示面板的驱动方法、时序控制器及液晶显示器，能够降低源极驱动器在显示重载画面时的输出功耗过高且避免温度升高而影响显示质量。
本发明第一方面提供一种显示面板的驱动方法，包括：
在检测到待显示画面帧为重载画面时，时序控制器将工作频率从第一频率切换至第二频率；
所述时序控制器以所述第二频率向源极驱动器输出时序控制信号，以使所述源极驱动器接收到所述时序控制信号后输出频率变低的驱动信号来驱动所述显示面板显示所述重载画面；
其中，所述第一频率高于所述第二频率；
所述重载画面为：当所述时序控制器采用第一频率作为工作频率控制所述源极驱动器来驱动显示所述待显示画面帧时，所述源极驱动器的功耗超过设定功耗值，则所述待显示画面帧为重载画面。
本发明第二方面提供一种显示面板的时序控制器，包括：
控制电路，用于在检测到待显示画面帧为重载画面时，输出第一频率切换指示；
信号产生电路，与所述控制电路连接，用于根据所述第一频率切换指示将工作频率从第一频率切换至第二频率，并以所述第二频率输出时序控制信号至源极驱动器，以使所述源极驱动器接收到所述时序控制信号后输出频率变低的驱动信号来驱动所述显示面板显示所述重载画面；
其中，所述第一频率高于所述第二频率；
所述重载画面为：当所述时序控制器采用第一频率作为工作频率控制所述源极驱动器来驱动显示所述待显示画面帧时，所述源极驱动器的功耗超过设定功耗值，则所述待显示画面帧为重载画面。
本发明第三方面提供一种液晶显示器，包括：
时序控制器，用于输出时序控制信号；
显示驱动电路，包括源极驱动器和栅极驱动器，用于接收所述时序控制信号，并所述源极驱动器根据所述时序控制信号产生数据驱动信号，所述栅极驱动器产生扫描驱动信号；
液晶显示面板，包括若干条数据线、扫描线以及若干个像素单元，所述扫描线接收所述扫描驱动信号，且所述数据线接收所述数据驱动信号，以控制对应的所述像素单元进行显示；
其中，所述时序控制器为上述的时序控制器；
所述信号产生电路具体用于在相邻帧的切换时刻将工作频率从第一频率切换至第二频率；
所述控制电路还用于在检测到待显示画面帧为非重载画面时，输出第二频率切换指令；
所述信号产生电路还用于根据所述第二频率切换指示将工作频率从第二频率切换回第一频率，并以所述第一频率输出时序控制信号至源极驱动器，以使所述源极驱动器接收到所述时序控制信号后输出对应的驱动信号来驱动所述显示面板显示所述非重载画面。
上述方案中，时序控制器在检测到重载画面时，将工作频率从第一频率降低至第二频率，以输出第二频率的时序控制信号，使得接收到其时序控制信号的源极驱动器对显示面板输出的驱动信号的频率降低，进而降低源极驱动器在显示重载画面时的输出功耗，而且，由于其驱动信号的频率降低，故避免其温度升高从而影响显示质量。
【附图说明】
图1是本发明液晶显示器一实施方式的结构示意图；
图2是图1所示的时序控制器110的结构示意图；
图3是图1所示的液晶显示面板130在一应用场景中的部分结构示意图；
图4是在图3所示应用场景中，时序控制器110采用不同工作频率时显示驱动电路输出波形示意图；
图5是本发明液晶显示器的液晶显示面板另一实施例的结构示意图；
图6是本发明显示面板的驱动方法一实施例的流程示意图；
图7是本发明显示面板的驱动方法另一实施例的部分流程示意图。
【具体实施方式】
以下描述中，为了说明而不是为了限定，提出了诸如特定***结构、接口、技术之类的具体细节，以便透彻理解本发明。然而，本领域的技术人员应当清楚，在没有这些具体细节的其它实施方式中也可以实现本发明。在其它情况中，省略对众所周知的装置、电路以及方法的详细说明，以免不必要的细节妨碍本发明的描述。
请参阅图1和图2，图1是本发明液晶显示器一实施方式的结构示意图，图2是时序控制器一实施路的结构示意图。该液晶显示器具体为TFT 液晶显示器。本实施例中，该液晶显示器包括依序连接的时序控制器（Timer Controller，TCON）110、显示驱动电路120和液晶显示面板130。其中，该显示驱动电路进一步包括源极驱动器122和栅极驱动器123。
时序控制器110用于产生时序控制信号，具体如将驱动板（AD Board）发送的图像数据信号、控制信号和时钟信号转换成适合显示驱动电路120的数据信号、控制信号和时钟信号。其中，时序控制器110向显示驱动电路120的源极驱动器122和栅极驱动器123分别输出对应的时序控制信号。
显示驱动电路120具体接收该时序控制信号，并根据该时序控制信号产生驱动信号。
其中，源极驱动器122用于在时序控制器110的控制***下，将待显示画面帧的图像数据信号存储在缓存中，并配合栅极扫描信号的开启，将该图像数据信号转换成要输出至像素中的驱动电压，以驱动显示面板中的数据线。
栅极驱动器123用于接收时序控制器110输出的控制信号，循序对栅极线输出适当的开关电压，以驱动显示面板的栅极线。
液晶显示面板130用于在该源极驱动器120和栅极驱动器130的驱动下，实现对待显示画面帧的显示。
具体地，该时序控制器110包括相互连接的控制电路111和信号产生电路112。该时序控制器110预先设定两种工作频率分别为第一频率和第二频率。其中，第一频率高于第二频率，该第一频率为正常显示下时序控制器110的工作频率，该第二频率为显示重载画面时，时序控制器110的工作频率。在一实施例中，该第二频率可为该第一频率的一半。
重载画面的定义为：在时序控制器110采用第一频率作为工作频率控制所述源极驱动器122进行驱动显示待显示画面帧时，源极驱动器122的功耗超过设定功耗值，则该待显示画面帧为重载画面。
时序控制器110在显示正常画面时，以第一频率工作，当检测到需显示重载画面时，则切换为第二频率工作。具体实现工作频率的切换方式如下：
控制电路111用于在检测到待显示画面帧为重载画面时，输出第一频率切换指示。具体，在该时序控制器110接收到待显示画面帧的数据时，控制电路111实时将该待显示画面帧的数据与内部存储的重载画面的数据进行对比，若判定上述两个数据相似或相同，则判定为该待显示画面为重载画面。
信号产生电路112用于根据所述第一频率切换指示将工作频率从第一频率切换至第二频率，并以所述第二频率输出时序控制信号至显示驱动电路，以使所述显示驱动电路120根据所述时序控制信号驱动液晶显示面板130显示所述重载画面。具体地，信号产生电路112可在相邻帧的切换时刻（V-blank时间，也即当显示完该重载画面的上一画面帧时）将工作频率从第一频率切换至第二频率。
由于第二频率低于第一频率，故时序控制器110在以第二频率向显示驱动电路输出该重载画面的相关时序控制信号如TP1（数据从源极驱动器到显示面板的输出信号）、STV（栅极的启动信号，也就是该画面帧的开始）、CKV（时钟信号）等信号，即该时序控制信号的频率降低为第二频率，故源极驱动器122在驱动显示重载画面时的驱动电路的频率降低（驱动信号中的高低电压的变化周期变长），因此降低了源极显示驱动电路的输出功耗，且避免由于电压变化频率高而导致发热变大，进而影响显示质量。
例如，如图3所示，液晶显示面板130包括若干条数据线131、扫描线133以及若干个像素单元132，其中，该数据线131和扫描线133可成纵横设置，像素单元132与相应的一条数据线131和扫描线133连接，以接收该数据线131和扫描线133输出的信号实现显示，该像素单元132可包括RGB三原色子像素单元。具体，该栅极驱动器123向扫描线133输出扫描驱动信号。源极驱动器122向数据线131输出数据驱动信号，其中，第一列数据线给R色像素单元132输出数据信号，第二列数据线给G色像素单元132输出数据信号，第三列数据线给B色像素单元132输出数据信号。以第一列数据线131为例，假如亮对应14V电压,暗对应8v电压。此时，若时序控制器110以第一频率进行驱动控制，该数据线电压变化波形如图4的上波形图，若时序控制信号侦测该画面为重载画面（pattern,），则将工作频率降低为第二频率，此时，该数据线电压变化波形如图4的下波形图，显然其数据线的电压变化频率降低。
进一步地，时序控制器110在控制显示完该重载画面后，若发现后面为正常画面显示，则将工作频率切换回第一频率。具体如下：
控制电路111还用于在检测到待显示画面帧为非重载画面时，输出第二频率切换指令；
信号产生电路112还用于根据所述第二频率切换指示将工作频率从第二频率切换回第一频率，并以所述第一频率输出时序控制信号至源极驱动器123，以使所述源极驱动器123接收到所述时序控制信号后输出对应的驱动信号来驱动液晶显示面板130显示所述非重载画面。具体，信号产生电路112可在相邻帧的切换时刻完成该工作频率的切换。
此时，由于该时序控制器110的工作频率恢复至正常的第一频率，故对应的源极驱动器输出的驱动信号的频率也恢复至正常（如图4的上波形图）。
由于一般视频画面大多为非重载画面，故采用本实施例方式既保证了正常画面的动态显示效果，又能降低重载画面的功耗。
可以理解的是，在具体应用中，该时序控制器的控制电路和信号产生电路可继承在同一芯片中，或者采用同一电路实现，在此不作限定。
在另一液晶显示器的实施例中，请参阅图5，该液晶显示面板530包括阵列基板531、彩膜基板532以及夹置于所述阵列基板531和彩膜基板532之间的液晶533。该阵列基板531包括纵横设置的数据线和扫描线、以及像素单元，具体可如图3所述，该数据线和扫描线分别接收上述显示驱动电路120输出的数据驱动信号和扫描驱动信号，以驱动该像素单元进行显示。
另外，该时序控制器未必限制应用于液晶显示器中，在其他实施例中，可应用于其他同样需要采用源极驱动器向显示面板的数据线输出驱动信号的显示器。
请参阅图6，图6是本发明显示面板的驱动方法一实施例的流程示意图。本实施方法应用于如上述实施例所述的源极驱动电路，该驱动方法可由上述实施例中的时序控制器执行。该方法具体包括：
S601：时序控制器在检测到待显示画面帧为重载画面时，将工作频率从第一频率切换至第二频率。
例如，该时序控制器在接收到待显示画面帧的数据时，实时将该待显示画面帧的数据与内部存储的重载画面的数据进行对比，若判定上述两个数据相似或相同，则判定为该待显示画面为重载画面。
S602：时序控制器以所述第二频率向源极驱动器输出时序控制信号，以使所述源极驱动器接收到所述时序控制信号后输出频率变低的驱动信号来驱动所述显示面板显示所述重载画面。
其中，所述第一频率高于所述第二频率，例如，所述第二频率为所述第一频率的一半。
所述重载画面为：当所述时序控制器采用第一频率作为工作频率控制所述源极驱动器来驱动显示所述待显示画面帧时，所述源极驱动器的功耗超过设定功耗值，则所述待显示画面帧为重载画面。
请结合参阅图7，图7是本发明显示驱动电路的时序控制方法另一实施例的部分流程示意图。本实施例与上一实施例的区别在于，本实施例方法在执行上述S601-S602后，还包括：
S703: 时序控制器在检测到待显示画面帧为非重载画面时，将工作频率从第二频率切换回第一频率。
S704:时序控制器以所述第一频率向所述源极驱动器输出时序控制信号，以使所述源极驱动器接收到所述时序控制信号后输出对应的驱动信号来驱动所述显示面板显示所述非重载画面。
其中，时序控制器具体在相邻帧的切换时刻完成工作频率从第一频率的切换。
上述方案中，时序控制器在检测到重载画面时，将工作频率从第一频率降低至第二频率，以输出第二频率的时序控制信号，使得接收到其时序控制信号的源极驱动器对显示面板输出的驱动信号的频率降低，进而降低源极驱动器在显示重载画面时的输出功耗，而且，由于其驱动信号的频率降低，故避免其温度升高从而影响显示质量。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (14)

  1. 一种液晶显示器，其中，包括：
    时序控制器，用于输出时序控制信号；
    显示驱动电路，包括源极驱动器和栅极驱动器，用于接收所述时序控制信号，并所述源极驱动器根据所述时序控制信号产生数据驱动信号，所述栅极驱动器产生扫描驱动信号；以及
    液晶显示面板，包括若干条数据线、扫描线以及若干个像素单元，所述扫描线接收所述扫描驱动信号，且所述数据线接收所述数据驱动信号，以控制对应的所述像素单元进行显示；
    其中，所述时序控制器包括：
    控制电路，用于在检测到待显示画面帧为重载画面时，输出第一频率切换指示；
    信号产生电路，与所述控制电路连接，用于根据所述第一频率切换指示在相邻帧的切换时刻将工作频率从第一频率切换至第二频率，并以所述第二频率输出时序控制信号至源极驱动器，以使所述源极驱动器接收到所述时序控制信号后输出频率变低的驱动信号来驱动所述显示面板显示所述重载画面；
    所述控制电路还用于在检测到待显示画面帧为非重载画面时，输出第二频率切换指令；
    所述信号产生电路还用于根据所述第二频率切换指示将工作频率从第二频率切换回第一频率，并以所述第一频率输出时序控制信号至源极驱动器，以使所述源极驱动器接收到所述时序控制信号后输出对应的驱动信号来驱动所述显示面板显示所述非重载画面。
    其中，所述第一频率高于所述第二频率；
    所述重载画面为：当所述时序控制器采用第一频率作为工作频率控制所述源极驱动器来驱动显示所述待显示画面帧时，所述源极驱动器的功耗超过设定功耗值，则所述待显示画面帧为重载画面。
  2. 根据权利要求1所述的液晶显示器，其中，
    所述信号产生电路具体用于在相邻帧的切换时刻将工作频率从第二频率切换回第一频率。
  3. 根据权利要求1所述的液晶显示器，其中，
    所述第二频率为所述第一频率的一半。
  4. 根据权利要求1所述的液晶显示器，其中，
    所述液晶显示面板包括阵列基板、彩膜基板以及夹置于所述阵列基板和彩膜基板之间的液晶，所述数据线、扫描线以及像素单元设置在所述阵列基板上。
  5. 一种显示面板的驱动方法，其中，包括：
    在检测到待显示画面帧为重载画面时，时序控制器将工作频率从第一频率切换至第二频率；
    所述时序控制器以所述第二频率向源极驱动器输出时序控制信号，以使所述源极驱动器接收到所述时序控制信号后输出频率变低的驱动信号来驱动所述显示面板显示所述重载画面；
    其中，所述第一频率高于所述第二频率；
    所述重载画面为：当所述时序控制器采用第一频率作为工作频率控制所述源极驱动器来驱动显示所述待显示画面帧时，所述源极驱动器的功耗超过设定功耗值，则所述待显示画面帧为重载画面。
  6. [根据细则91更正 24.05.2017]
    根据权利要求5所述的驱动方法，其中，
    所述时序控制器将工作频率从第一频率切换至第二频率，包括：
    所述时序控制器在相邻帧的切换时刻将工作频率从第一频率切换至第二频率。
  7. [根据细则91更正 24.05.2017]
    根据权利要求5所述的驱动方法，其中，
    在所述时序控制器采用第二频率作为工作频率，向源极驱动器输出时序控制信号之后，还包括：
    在检测到待显示画面帧为非重载画面时，所述时序控制器将工作频率从第二频率切换回第一频率；
    所述时序控制器以所述第一频率向所述源极驱动器输出时序控制信号，以使所述源极驱动器接收到所述时序控制信号后输出对应的驱动信号来驱动所述显示面板显示所述非重载画面。
  8. [根据细则91更正 24.05.2017]
    根据权利要求7所述的驱动方法，其中，
    所述时序控制器将工作频率从第二频率切换回第一频率，包括：
    所述时序控制器在相邻帧的切换时刻将工作频率从第二频率切换回第一频率。
  9. [根据细则91更正 24.05.2017]
    根据权利要求5所述的驱动方法，其中，
    所述第二频率为所述第一频率的一半。
  10. 一种显示面板的时序控制器，其中，包括：
    控制电路，用于在检测到待显示画面帧为重载画面时，输出第一频率切换指示；
    信号产生电路，与所述控制电路连接，用于根据所述第一频率切换指示将工作频率从第一频率切换至第二频率，并以所述第二频率输出时序控制信号至源极驱动器，以使所述源极驱动器接收到所述时序控制信号后输出频率变低的驱动信号来驱动所述显示面板显示所述重载画面；
    其中，所述第一频率高于所述第二频率；
    所述重载画面为：当所述时序控制器采用第一频率作为工作频率控制所述源极驱动器来驱动显示所述待显示画面帧时，所述源极驱动器的功耗超过设定功耗值，则所述待显示画面帧为重载画面。
  11. [根据细则91更正 24.05.2017]
    根据权利要求10所述的时序控制器，其中，
    所述信号产生电路具体用于在相邻帧的切换时刻将工作频率从第一频率切换至第二频率。
  12. [根据细则91更正 24.05.2017]
    根据权利要求10所述的时序控制器，其中，
    所述控制电路还用于在检测到待显示画面帧为非重载画面时，输出第二频率切换指令；
    所述信号产生电路还用于根据所述第二频率切换指示将工作频率从第二频率切换回第一频率，并以所述第一频率输出时序控制信号至源极驱动器，以使所述源极驱动器接收到所述时序控制信号后输出对应的驱动信号来驱动所述显示面板显示所述非重载画面。
  13. [根据细则91更正 24.05.2017]
    根据权利要求12所述的时序控制器，其中，
    所述信号产生电路具体用于在相邻帧的切换时刻将工作频率从第二频率切换回第一频率。
  14. [根据细则91更正 24.05.2017]
    根据权利要求10所述的时序控制器，其中，
    所述第二频率为所述第一频率的一半。
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