WO2020062629A1 - 显示面板的驱动方法、装置及显示装置 - Google Patents

显示面板的驱动方法、装置及显示装置 Download PDF

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Publication number
WO2020062629A1
WO2020062629A1 PCT/CN2018/122186 CN2018122186W WO2020062629A1 WO 2020062629 A1 WO2020062629 A1 WO 2020062629A1 CN 2018122186 W CN2018122186 W CN 2018122186W WO 2020062629 A1 WO2020062629 A1 WO 2020062629A1
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Prior art keywords
frequency
control signal
display panel
driving
output control
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PCT/CN2018/122186
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English (en)
French (fr)
Inventor
王明良
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惠科股份有限公司
重庆惠科金渝光电科技有限公司
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Priority to US17/042,779 priority Critical patent/US11361721B2/en
Publication of WO2020062629A1 publication Critical patent/WO2020062629A1/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
    • G09G3/3614—Control of polarity reversal in general
    • 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
    • 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
    • G09G2310/0243—Details of the generation of driving signals
    • 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
    • G09G2370/00—Aspects of data communication
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/08—Details of image data interface between the display device controller and the data line driver circuit

Definitions

  • the present application relates to the field of driving liquid crystal panels, and in particular, to a method, a device, and a display device for driving a display panel.
  • a display panel includes a main control chip, a data driving chip, a row driving chip, and a liquid crystal pixel.
  • the main control chip outputs control signals, polarity control signals, and display data to the data driving chip, and the data driving chip outputs the data to the liquid crystal pixels through the data line.
  • the polarity of the data line is reversed at a preset period.
  • the common polarity deflection process is that in the previous frame image, the polarity control signal is at a low level, and at the falling edge of the data output control signal, the data driving chip starts to output a negative polarity voltage. After the end of the previous frame image, the polarity control signal is switched to a high level. At the next frame number of images, the data driving chip starts to output a positive polarity voltage, thereby implementing the polarity control signal to control the output polarity.
  • the polarity control signal in this process is transmitted from the main control chip to the data driving chip by a separate data line.
  • the communication interface of the current display panel contains a large number of data signals and control signals. Too many traces will lead to an increase in product failure rate.
  • PCB Printed Circuit Board (printed circuit board) is too large in size, which has further increased costs.
  • the main purpose of the present application is to provide a driving method for a display panel, which aims to eliminate data lines for transmitting polarity control signals and reduce production costs.
  • a driving method of a display panel includes:
  • the frequency of the polarity control signal is calculated according to the first frequency and the second frequency, and the polarity control signal is generated according to the calculated frequency to drive the panel.
  • recording and saving it as a second frequency further includes:
  • the calculating the polarity control signal according to the first frequency and the second frequency includes:
  • the frequency of the clock scan signal output by the row driving chip is taken as the frequency of the polarity control signal.
  • the calculating the polarity control signal according to the first frequency and the second frequency includes:
  • the second frequency is taken as the frequency of the polarity control signal.
  • the “determining whether the data output control signal enters a preset working time” includes:
  • the method before the “detecting the frequency of the data output control signal during data transmission, recording and saving as the first frequency”, the method further includes:
  • the present application proposes a driving device for a display panel.
  • the driving device for the display panel includes:
  • a first detection module which detects the frequency of the data output control signal during the data transmission of the display panel, records and saves it as the first frequency
  • a first judgment module which judges whether the data output control signal enters a preset working time
  • the second detection module detects the frequency of the data output control signal when entering a preset working time, records and saves the frequency as a second frequency;
  • the driving module calculates the frequency of the polarity control signal according to the first frequency and the second frequency, and generates a polarity control signal according to the calculated frequency to drive the display panel.
  • the driving device of the display panel further includes a second determination module that determines whether the frequency of the second frequency within the first preset time is zero.
  • the driving module when the frequency of the second frequency within the first preset time is zero, takes the frequency of the clock scanning signal output by the driving chip as the frequency of the polarity control signal; at the second frequency When the frequency in the first preset time is not zero, the second frequency is taken as the frequency of the polarity control signal.
  • the present application also proposes a display device, which includes:
  • the first detection module detects the frequency of the data output control signal during the data transmission of the display panel, records and saves it as the first frequency; the first judgment module determines whether the data output control signal enters a preset working time; the second judgment The module determines whether the frequency of the second frequency is zero within the first preset time; the second detection module detects the frequency of the data output control signal when entering the preset working time, records and saves the second frequency; The driving module calculates the frequency of the polarity control signal according to the first frequency and the second frequency, and generates the polarity control signal according to the calculated frequency to drive the display panel.
  • the driving module is configured to drive the display panel at the second frequency within the first preset time.
  • the frequency of the clock scan signal output by the row driving chip is the frequency of the polarity control signal; when the frequency of the second frequency within the first preset time is not zero, the second frequency is taken as the polarity The frequency of the control signal.
  • the technical solution of the present application detects the frequency of the data output control signal during data transmission, and detects the frequency of the data output control signal within a preset working time, and then obtains the polarity control signal according to the frequencies of the two. Frequency, thereby generating a polarity control signal.
  • the technical solution of the present application can directly calculate the polarity control signal, and there is no need to set a data line for transmitting the polarity control signal between the main control chip and the data driving chip, which reduces the number of traces, improves product yield, and reduces cost.
  • FIG. 1 is a flowchart of an embodiment of a driving method of a display panel of the present application
  • FIG. 2 is a schematic structural diagram of an embodiment of a driving device for a display panel of the present application
  • FIG. 3 is a signal timing diagram of an embodiment of a driving method of a display panel of the present application.
  • FIG. 4 is a functional module diagram of an embodiment of a driving device for a display panel of the present application.
  • FIG. 5 is a functional module diagram of an embodiment of a display device of the present application.
  • the directional indication is only used to explain in a specific posture (as shown in the drawings) (Shown) the relative positional relationship, movement, etc. of the various components, if the specific posture changes, the directional indicator will change accordingly.
  • This application proposes a method for driving a display panel.
  • the method for driving a display panel is applied to a display device, such as a liquid crystal display.
  • the driving method of the display panel includes:
  • a general liquid crystal panel includes a main control chip, a data driving chip, a line driving chip, a thin film transistor, and a liquid crystal pixel.
  • the liquid crystal panel further includes a plurality of scanning lines (ie, S1 to Sn) and data lines (ie, G1 to Gn). ), Scanning lines and data lines are staggered to form a plurality of cells, and each cell is provided with a liquid crystal pixel Cg and a thin film transistor TFT (Thin Film Transistor).
  • the scanning line is connected to the row driving chip and connected to the controlled end of the corresponding thin film transistor TFT, and outputs a clock scanning signal for controlling the turning on or off of the thin film transistor TFT.
  • the data line is connected to the data driving chip and is The input terminal of the thin film transistor TFT is connected, and the output terminal of the thin film transistor TFT is connected to the corresponding liquid crystal capacitor Cg.
  • the data output control signal TP1 and the polarity control signal are two control signals necessary for the data driving chip.
  • the data output control signal TP1 is used to latch data and control the output voltage.
  • the polarity control signal is used to control the polarity of the output voltage.
  • OUT1 in Figure 3 is the data output signal of the data driver chip. After the frame is output and before the next frame is output, the data-driven chip enters a high-impedance state mode, that is, the data-driven chip stops outputting within this time period.
  • the polarity control signal is a level signal, which includes two levels of low level and high level.
  • the low level voltage and high level voltage are known, so as long as the polarity control signal is determined, Frequency, the polarity control signal is obtained.
  • the panel is driven by calculating the frequency of the polarity control signal according to the first frequency and the second frequency, and then generating and generating the polarity control signal.
  • step S300 the preset working time (V-blank) refers to a time period when no data is transmitted to the data driving chip.
  • the technical solution of the present application detects the frequency of the data output control signal TP1 during data transmission, and detects the frequency of the data output control signal TP1 within a preset working time, and then obtains the polarity according to the frequencies of the two. Controls the frequency of the signal to generate a polarity control signal.
  • the technical solution of the present application can directly calculate the polarity control signal, and there is no need to set a data line for transmitting the polarity control signal between the main control chip and the data driving chip, which reduces the number of traces, improves product yield, and reduces cost.
  • recording and saving it as the second frequency further includes:
  • S500 Determine whether the frequency of the second frequency within the first preset time is zero.
  • the level of the detection data output control signal TP1 continues to be a high level or a low level within the first preset time after entering the preset working time, it is judged that the second frequency is zero.
  • the calculating the polarity control signal according to the first frequency and the second frequency includes:
  • the frequency of the clock scan signal output by the row driving chip is taken as the frequency of the polarity control signal.
  • the frequency of the polarity control signal is the same as the frequency of the clock scanning signal.
  • the calculating the polarity control signal according to the first frequency and the second frequency includes:
  • the second frequency is taken as the frequency of the polarity control signal.
  • the frequency of the polarity control signal is the same as the second frequency.
  • the “determining whether the data output control signal TP1 enters a preset working time” includes:
  • the preset working time is the idle time of the LCD panel.
  • the data output control signal TP1 is always at a low level. Therefore, whether to enter the idle time can be determined by judging that the data output control signal TP1 continues at a low level.
  • the method before the “detecting the frequency of the data output control signal TP1 during data transmission, recording and saving as the first frequency”, the method further includes:
  • the main control chip receives the image data signal from the liquid crystal panel logic board (TCON), and extracts the data output control signal TP1 from it.
  • TCON liquid crystal panel logic board
  • the present application also proposes a driving device for a display panel.
  • the driving device for the display panel includes:
  • the first detection module 100 detects the frequency of the data output control signal TP1 during the data transmission of the display panel, records and saves the frequency as the first frequency;
  • the first determining module 200 determines whether the data output control signal TP1 has entered a preset working time
  • the second detection module 300 detects the frequency of the data output control signal TP1 when entering a preset working time, records it and saves it as the second frequency;
  • the driving module 500 calculates the frequency of the polarity control signal according to the first frequency and the second frequency, and generates a polarity control signal according to the calculated frequency to drive the display panel.
  • the frequency of the data output control signal TP1 is detected and recorded, which is recorded as F1.
  • the data output control signal TP1 is maintained at a low level, and then the time when the data output control signal TP1 is at a low level is detected.
  • the frequency of this F2 is the frequency at which the polarity control signal is switched. High level or low level, that is, the frequency F2 is 0, which is considered to be a column at this time Inversion (column inversion) mode, the polarity control signal is switched once per frame.
  • the driving device of the display panel further includes:
  • the second determination module 400 determines whether the frequency of the second frequency within the first preset time is zero.
  • the frequency of the driving module 500 is zero at the second frequency within the first preset time, the frequency of the clock scanning signal output by the driving chip is the frequency of the polarity control signal; When the frequency within time is not zero, the second frequency is taken as the frequency of the polarity control signal.
  • the present application also proposes a display device including the driving device of the display panel.
  • a display device including the driving device of the display panel.
  • All the technical solutions of the embodiments have at least all the beneficial effects brought by the technical solutions of the foregoing embodiments, and will not be repeated one by one here.
  • the display device further includes a main control chip, a data driving chip, a line driving chip, a thin film transistor TFT, and a liquid crystal pixel.
  • the display panel further includes a plurality of scanning lines and data lines. The scanning lines and the data lines are staggered. A plurality of cells are formed, and each cell is provided with a liquid crystal pixel and a thin film transistor TFT.
  • the scanning line is connected to the row driving chip and connected to the controlled end of the corresponding thin film transistor TFT, and outputs a clock scanning signal for controlling the turning on or off of the thin film transistor TFT;
  • the data line is connected to the data driving chip and is connected to the corresponding
  • the input terminal of the thin film transistor TFT is connected, and the output terminal of the thin film transistor TFT is connected to the corresponding liquid crystal capacitor Cg.
  • the display device further includes a logic board, and the logic board (ie, TCON) is electrically connected to the driving device.
  • the logic board ie, TCON
  • a gate driver and a source driver are provided on the driving device, and the gate driver and the source driver are respectively connected to the logic board.
  • each pixel includes three three primary color sub-pixels, which are RGB sub-pixels representing red, green, and blue.
  • the image data is input to TCON, and after processing and conversion, a display data signal and a clock control signal of the source driver and the gate driver are formed. Specifically, a data signal is loaded by a source driver, a timing is controlled by a gate driver, and a clock signal is transmitted to a pixel of a glass substrate through a driver board, thereby realizing scanning display of an image.

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Abstract

一种显示面板的驱动方法、装置及显示装置，其中显示面板的驱动方法包括：S200侦测在进行数据传输时数据输出控制信号TP1的频率，记录并保存为第一频率F1；S300判断数据输出控制信号TP1是否进入预设工作时间；S400在进入预设工作时间时，侦测数据输出控制信号TP1的频率，记录并保存为第二频率F2；S600根据第一频率F1及第二频率F2计算极性控制信号的频率，根据计算得到的频率生成极性控制信号驱动面板。

Description

显示面板的驱动方法、装置及显示装置
相关申请
本申请要求2018年9月26日申请的，申请号为201811134825.7，名为 “驱动装置、显示装置及驱动方法”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及液晶面板驱动领域，特别涉及一种显示面板的驱动方法、装置及显示装置。
背景技术
通常显示面板包括有主控芯片、数据驱动芯片、行驱动芯片及液晶像素。主控芯片输出控制信号、极性控制信号及显示数据给数据驱动芯片，数据驱动芯片再通过数据线输出至液晶像素。
为消除液晶像素中残留的直流电压对显示的影响，数据线的极性会按预设周期进行反转。目前常见的极性偏转过程是，在前一帧图像中，极性控制信号为低电平，在数据输出控制信号的下降沿时，数据驱动芯片开始输出负极性电压。前一帧图像结束后，极性控制信号切换至高电平，在下一帧数图像时，数据驱动芯片开始输出正极性电压，由此实现极性控制信号控制输出的极性。该过程中的极性控制信号是由单独的数据线从主控芯片传输至数据驱动芯片。
然而在现行显示面板的通信接口中，包含着大量的数据信号与控制信号，过多的走线数量会带来产品不良率的提升；另外PCB（Printed Circuit Board，印制电路板）尺寸的过大，也进一步造成了成本的升高。
发明内容
本申请的主要目的是提出一种显示面板的驱动方法，旨在省去用于传输极性控制信号的数据线，降低生产成本。
为实现上述目的，本申请提出的显示面板的驱动方法，包括
侦测显示面板在进行数据传输时数据输出控制信号的频率，记录并保存为第一频率；
判断数据输出控制信号是否进入预设工作时间；
在进入预设工作时间时，侦测数据输出控制信号的频率，记录并保存为第二频率；
根据第一频率及第二频率计算极性控制信号的频率，根据计算得到的频率生成极性控制信号来驱动面板。
在一实施例中，在所述“在进入预设工作时间时，侦测数据输出控制信号的频率，记录并保存为第二频率”之后还包括：
判断第二频率在第一预设时间内的频率是否为零。
在一实施例中，所述根据第一频率及第二频率计算极性控制信号包括：
当第二频率在第一预设时间内的频率为零时，取行驱动芯片输出的时钟扫描信号的频率为极性控制信号的频率。
在一实施例中，所述根据第一频率及第二频率计算极性控制信号包括：
当第二频率在第一预设时间内的频率不为零时，取第二频率为极性控制信号的频率。
在一实施例中，所述“判断数据输出控制信号是否进入预设工作时间”包括：
采集数据输出控制信号，判断该信号是否为低电平；
在数据输出控制信号为低电平时，判断低电平的持续时间是否达到第二预设时间；
在低电平持续时间达到第二预设时间时，判断输出控制信号进入预设工作时间。
在一实施例中，在所述“侦测在进行数据传输时数据输出控制信号的频率，记录并保存为第一频率”之前还包括：
接收图像数据信号，从图像数据信号中提取数据输出控制信号。
本申请提出一种显示面板的驱动装置，所述显示面板的驱动装置包括：
第一侦测模块，侦测显示面板在进行数据传输时数据输出控制信号的频率，记录并保存为第一频率；
第一判断模块，判断数据输出控制信号是否进入预设工作时间；
第二侦测模块，在进入预设工作时间时，侦测数据输出控制信号的频率，记录并保存为第二频率；
驱动模块，根据第一频率及第二频率计算极性控制信号的频率，根据计算得到的频率生成极性控制信号来驱动显示面板。
在一实施例这个，所述显示面板的驱动装置还包括：第二判断模块，判断第二频率在第一预设时间内的频率是否为零。
在一实施例中，所述驱动模块在第二频率在第一预设时间内的频率为零时，取行驱动芯片输出的时钟扫描信号的频率为极性控制信号的频率；在第二频率在第一预设时间内的频率不为零时，取第二频率为为极性控制信号的频率。
本申请还提出一种显示装置，所述显示装置包括：
第一侦测模块，侦测显示面板在进行数据传输时数据输出控制信号的频率，记录并保存为第一频率；第一判断模块，判断数据输出控制信号是否进入预设工作时间；第二判断模块，判断第二频率在第一预设时间内的频率是否为零；第二侦测模块，在进入预设工作时间时，侦测数据输出控制信号的频率，记录并保存为第二频率；驱动模块，根据第一频率及第二频率计算极性控制信号的频率，根据计算得到的频率生成极性控制信号来驱动显示面板；所述驱动模块在第二频率在第一预设时间内的频率为零时，取行驱动芯片输出的时钟扫描信号的频率为极性控制信号的频率；在第二频率在第一预设时间内的频率不为零时，取第二频率为为极性控制信号的频率。
本申请技术方案通过在进行数据传输时，侦测数据输出控制信号的频率，并侦测在进入预设工作时间内数据输出控制信号的频率，然后根据这两者的频率，获得极性控制信号的频率，从而生成极性控制信号。本申请技术方案可直接计算得到极性控制信号，无需在主控芯片与数据驱动芯片之间设置用于传输极性控制信号的数据线，降低了走线数量，提升了产品良率，降低了成本。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本申请显示面板的驱动方法一实施例的流程图；
图2为本申请显示面板的驱动装置一实施例的结构示意图；
图3为本申请显示面板的驱动方法一实施例的信号时序图；
图4为本申请显示面板的驱动装置一实施例的功能模块图；
图5为本申请显示装置一实施例的功能模块图。
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明，若本申请实施例中有涉及方向性指示（诸如上、下、左、右、前、后……），则该方向性指示仅用于解释在某一特定姿态（如附图所示）下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本申请实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本申请要求的保护范围之内。
本申请提出一种显示面板的驱动方法，本实施例中，该显示面板的驱动方法应用于一种显示装置上，例如液晶显示器上。
在本申请实施例中，如图1所示，该显示面板的驱动方法，包括
S200、侦测显示面板在进行数据传输时数据输出控制信号的频率，记录并保存为第一频率；
S300、判断数据输出控制信号是否进入预设工作时间；
S400、在进入预设工作时间时，侦测数据输出控制信号的频率，记录并保存为第二频率；
S600、根据第一频率及第二频率计算极性控制信号的频率，根据计算得到的频率生成极性控制信号来驱动面板。
参照图2，通常的液晶面板包括有主控芯片、数据驱动芯片、行驱动芯片、薄膜晶体管及液晶像素，液晶面板还包括多条扫描线（即S1~Sn）及数据线（即G1~Gn），扫描线与数据线交错设置，形成多个单元格，每个单元格中设置有液晶像素Cg及薄膜晶体管TFT(Thin Film Transistor)。扫描线与行驱动芯片连接并与对应的薄膜晶体管TFT的受控端相连接，输出时钟扫描信号，用于控制薄膜晶体管TFT的开启或关断；数据线与数据驱动芯片连接，并与对应的薄膜晶体管TFT的输入端连接，薄膜晶体管TFT的输出端再与对应的液晶电容Cg连接。
请参照图3，值得说明的是，数据输出控制信号TP1及极性控制信号是数据驱动芯片必需的两个控制信号，其中，数据输出控制信号TP1用于锁存数据及控制输出的电压大小，而极性控制信号则用来控制输出电压的极性。图3中OUT1为数据驱动芯片的数据输出信号，在前一帧图像（previous frame）输出后与后一帧图像（next frame）输出前，数据驱动芯片会进入高阻态模式，即这个时间段内数据驱动芯片停止输出。
极性控制信号是一种电平信号，包括有低电平及高电平两种电平状态，而低电平电压和高电平电压是已知的，因此只要确定了极性控制信号的频率，就得到了极性控制信号。
在本实施例中，通过根据第一频率及第二频率计算极性控制信号的频率，然后再生成生成极性控制信号来驱动面板。
在步骤S300中，所述预设工作时间（V-blank）是指在没有数据传输至数据驱动芯片时所处的时间段。
本申请技术方案通过在进行数据传输时，侦测数据输出控制信号TP1的频率，并侦测在进入预设工作时间内数据输出控制信号TP1的频率，然后根据这两者的频率，获得极性控制信号的频率，从而生成极性控制信号。本申请技术方案可直接计算得到极性控制信号，无需在主控芯片与数据驱动芯片之间设置用于传输极性控制信号的数据线，降低了走线数量，提升了产品良率，降低了成本。
在一实施例中，在所述“在进入预设工作时间时，侦测数据输出控制信号TP1的频率，记录并保存为第二频率”之后还包括：
S500、判断第二频率在第一预设时间内的频率是否为零。
需要说明的是，如果侦测到在进入预设工作时间后，侦测数据输出控制信号TP1的电平在第一预设时间内持续为高电平或低电平，则判断第二频率为零。
在一实施例中，所述根据第一频率及第二频率计算极性控制信号包括：
当第二频率在第一预设时间内的频率为零时，取行驱动芯片输出的时钟扫描信号的频率为极性控制信号的频率。
需要说明的是，在检测到第二频率为零时，判断进入了列反转模式，此时极性控制信号的频率与时钟扫描信号的频率相同。
在一实施例中，所述根据第一频率及第二频率计算极性控制信号包括：
当第二频率在第一预设时间内的频率不为零时，取第二频率为极性控制信号的频率。
在检测到第二频率不为零时，此时极性控制信号的频率与第二频率相同。
在一实施例中，所述“判断数据输出控制信号TP1是否进入预设工作时间”包括：
采集数据输出控制信号TP1，判断该信号是否为低电平；
在数据输出控制信号TP1为低电平时，判断低电平的持续时间是否达到第二预设时间；
在低电平持续时间达到第二预设时间时，判断输出控制信号进入预设工作时间。在本实施例中，预设工作时间为液晶显示面板空闲时间
请继续参照图3，这里，在前一帧图像（previous frame）与后一帧图像（next frame）之间切换时，存在一段时间不进行数据的传输，这段时间称之为空闲时间。在处于液晶显示面板的空闲时间时，数据输出控制信号TP1一直处于低电平，因此可以通过判断数据输出控制信号TP1在低电平持续的时间段来判断是否进入空闲时间。
在一实施例中，在所述“侦测在进行数据传输时数据输出控制信号TP1的频率，记录并保存为第一频率”之前还包括：
S100、接收图像数据信号，从图像数据信号中提取数据输出控制信号TP1。
易于理解的是，主控芯片接收液晶面板逻辑板（TCON）发出的图像数据信号，并从中提取出数据输出控制信号TP1。
参照图4，本申请还提出一种显示面板的驱动装置，所述显示面板的驱动装置包括：
第一侦测模100，侦测显示面板在进行数据传输时数据输出控制信号TP1的频率，记录并保存为第一频率；
第一判断模块200，判断数据输出控制信号TP1是否进入预设工作时间；
第二侦测模块300，在进入预设工作时间时，侦测数据输出控制信号TP1的频率，记录并保存为第二频率；
驱动模块500，根据第一频率及第二频率计算极性控制信号的频率，根据计算得到的频率生成极性控制信号来驱动显示面板。
在正常的数据传输过程中，侦测并记录数据输出控制信号TP1的频率，记录为F1。当进入预设工作时间（V-blank）内，数据输出控制信号TP1是一直维持低电平的，那么此时开始侦测数据输出控制信号TP1为低电平的时间。
当侦测到这一时间超过设定值T1时，认为此时已经进入到了V-blank时间，随后会进入到数据输出控制信号TP1频率的侦测。
如果此时侦测到数据输出控制信号TP1的频率F2为之前记录的频率F1的整数倍，那么取这个F2的频率为极性控制信号信号切换的频率，如果侦测到数据输出控制信号TP1恒为高电平或低电平，即频率F2为0，认为此时为column inversion（列反转）模式，极性控制信号一帧切换一次。
通过这种方式得到POL（Polarity control signal，极性控制信号）信号，再控制数据驱动芯片进行相应的极性输出，即可达到本方案的目的。
在一实施例中，进一步地，所述显示面板的驱动装置还包括：
第二判断模块400，判断第二频率在第一预设时间内的频率是否为零。
所述驱动模块500在第二频率在第一预设时间内的频率为零时，取行驱动芯片输出的时钟扫描信号的频率为极性控制信号的频率；在第二频率在第一预设时间内的频率不为零时，取第二频率为为极性控制信号的频率。
基于上述显示面板的驱动装置，本申请还提出一种显示装置，该显示装置包括上述显示面板的驱动装置，该显示面板的驱动装置的具体结构参照上述实施例，由于本显示装置采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。
请继续参照图2，该显示装置还包括有主控芯片、数据驱动芯片、行驱动芯片、薄膜晶体管TFT及液晶像素，显示面板还包括多条扫描线及数据线，扫描线与数据线交错设置，形成多个单元格，每个单元格中设置有液晶像素及薄膜晶体管TFT。扫描线与行驱动芯片连接并与对应的薄膜晶体管TFT的受控端相连接，输出时钟扫描信号，用于控制薄膜晶体管TFT的开启或关断；数据线与数据驱动芯片连接，并与对应的薄膜晶体管TFT的输入端连接，薄膜晶体管TFT的输出端再与对应的液晶电容Cg连接。
参照图5，所述显示装置还包括逻辑板，所述逻辑板（即TCON）与所述的驱动装置之间电性连接。驱动装置上设置有栅极驱动器及源极驱动器，所述栅极驱动器和源极驱动器分别与所述逻辑板连接。
需要说明的是，玻璃基板上设置多个呈矩阵排列的像素。每一个像素包括三个三原色子像素，分别为代表红绿蓝的RGB子像素。图像数据输入TCON，经处理变换后形成了显示数据信号，及源极驱动器和栅极驱动器的时钟控制信号。具体是，通过源极驱动器装载数据信号，通过栅极驱动器控制时序，通过驱动板传递时钟信号至玻璃基板的像素，实现了图像的扫描显示。
以上所述仅为本申请的可选实施例，并非因此限制本申请的专利范围，凡是在本申请的发明构思下，利用本申请说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本申请的专利保护范围内。

Claims (18)

  1. 一种显示面板的驱动方法，其中，包括
    侦测显示面板在进行数据传输时数据输出控制信号的频率，记录并保存为第一频率；
    判断数据输出控制信号是否进入预设工作时间；
    在进入预设工作时间时，侦测数据输出控制信号的频率，记录并保存为第二频率；
    根据第一频率及第二频率计算极性控制信号的频率，根据计算得到的频率生成极性控制信号来驱动显示面板。
  2. 如权利要求1所述的显示面板的驱动方法，其中，在所述“在进入预设工作时间时，侦测数据输出控制信号的频率，记录并保存为第二频率”之后还包括：
    判断第二频率在第一预设时间内的频率是否为零。
  3. 如权利要求2所述的显示面板的驱动方法，其中，所述根据第一频率及第二频率计算极性控制信号包括：
    当第二频率在第一预设时间内的频率为零时，取行驱动芯片输出的时钟扫描信号的频率为极性控制信号的频率。
  4. 如权利要求2所述的显示面板的驱动方法，其中，所述根据第一频率及第二频率计算极性控制信号包括：
    当第二频率在第一预设时间内的频率不为零时，取第二频率为极性控制信号的频率。
  5. 如权利要求1所述的显示面板的驱动方法，其中，所述“判断数据输出控制信号是否进入预设工作时间”包括：
    采集数据输出控制信号，判断该信号是否为低电平；
    在数据输出控制信号为低电平时，判断低电平的持续时间是否达到第二预设时间；
    在低电平持续时间达到第二预设时间时，判断输出控制信号进入预设工作时间。
  6. 如权利要求1所述的显示面板的驱动方法，其中，在所述“侦测在进行数据传输时数据输出控制信号的频率，记录并保存为第一频率”之前还包括：
    接收图像数据信号，从图像数据信号中提取数据输出控制信号。
  7. 如权利要求1所述的显示面板的驱动方法，其中，所述预设工作时间为显示面板空闲时间。
  8. 一种显示面板的驱动装置，其中，所述显示面板的驱动装置包括：
    第一侦测模块，侦测显示面板在进行数据传输时数据输出控制信号的频率，记录并保存为第一频率；
    第一判断模块，判断数据输出控制信号是否进入预设工作时间；
    第二侦测模块，在进入预设工作时间时，侦测数据输出控制信号的频率，记录并保存为第二频率；
    驱动模块，根据第一频率及第二频率计算极性控制信号的频率，根据计算得到的频率生成极性控制信号来驱动显示面板。
  9. 如权利要求8所述的显示面板的驱动装置，其中，所述显示面板的驱动装置还包括：
    第二判断模块，判断第二频率在第一预设时间内的频率是否为零。
  10. 如权利要求9所述的显示面板的驱动装置，其中，所述驱动模块在第二频率在第一预设时间内的频率为零时，取行驱动芯片输出的时钟扫描信号的频率为极性控制信号的频率；
  11. 如权利要求9所述的显示面板的驱动装置，其中，在第二频率在第一预设时间内的频率不为零时，取第二频率为为极性控制信号的频率。
  12. 如权利要求8所述的显示面板的驱动装置，其中，所述预设工作时间为显示面板空闲时间。
  13. 一种显示装置，其中，所述显示装置包括：
    第一侦测模块，侦测显示面板在进行数据传输时数据输出控制信号的频率，记录并保存为第一频率；
    第一判断模块，判断数据输出控制信号是否进入预设工作时间；
    第二判断模块，判断第二频率在第一预设时间内的频率是否为零；
    第二侦测模块，在进入预设工作时间时，侦测数据输出控制信号的频率，记录并保存为第二频率；
    驱动模块，根据第一频率及第二频率计算极性控制信号的频率，根据计算得到的频率生成极性控制信号来驱动显示面板；
  14. 如权利要求13所述的显示装置，所述驱动模块在第二频率在第一预设时间内的频率为零时，取行驱动芯片输出的时钟扫描信号的频率为极性控制信号的频率。
  15. 如权利要求14所述的显示装置，其中，当第二频率在第一预设时间内的频率为零时，取行驱动芯片输出的时钟扫描信号的频率为极性控制信号的频率。
  16. 如权利要求14所述的显示装置，其中，当第二频率在第一预设时间内的频率不为零时，取第二频率为极性控制信号的频率。
  17. 如权利要求13所述的显示装置，其中，所述第一判断模块在数据输出控制信号为低电平时，判断低电平的持续时间是否达到第二预设时间；在低电平持续时间达到第二预设时间时，判断输出控制信号进入预设工作时间。
  18. 如权利要求13所述的显示装置，其中，第一侦测模块接收图像数据信号，从图像数据信号中提取数据输出控制信号。
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