WO2017024627A1 - 一种液晶显示驱动系统及驱动方法 - Google Patents

一种液晶显示驱动系统及驱动方法 Download PDF

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Publication number
WO2017024627A1
WO2017024627A1 PCT/CN2015/088457 CN2015088457W WO2017024627A1 WO 2017024627 A1 WO2017024627 A1 WO 2017024627A1 CN 2015088457 W CN2015088457 W CN 2015088457W WO 2017024627 A1 WO2017024627 A1 WO 2017024627A1
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Prior art keywords
control signal
liquid crystal
crystal display
scan
data
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English (en)
French (fr)
Inventor
吴宇
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/906,546 priority Critical patent/US10229646B2/en
Publication of WO2017024627A1 publication Critical patent/WO2017024627A1/zh
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    • 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
    • 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
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • 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
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
    • 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

Definitions

  • the present invention relates to the field of liquid crystal display, and more particularly to a liquid crystal display driving system and a liquid crystal display driving method.
  • the display driving circuit In a display driving of a thin film transistor (TFT) liquid crystal display substrate, the display driving circuit usually includes a timing control circuit (TCON IC), a data driving circuit (Source Driver IC), a scan driving circuit (Gate Driver IC), and gray. Order circuits and power circuits, etc.
  • TCON IC timing control circuit
  • Data driving circuit can convert the display-related signal from the timing control circuit into an analog voltage, and output to the pixel electrode to form a voltage required for liquid crystal deflection; the output end of the scan driving circuit is connected to the gate of the TFT, in an orderly manner The switching state voltage of the TFT is output.
  • a data signal is usually transmitted between a timing control circuit, a data driving circuit, and a scan driving circuit using a mini-Low Voltage Differential Signaling (mini-LVDS) interface. Therefore, the timing control circuit is driven to data.
  • the circuit and the scan driving circuit output a large number of differential signals.
  • the timing control circuit also outputs a polarity inversion signal POL, a data latch signal TP, a frame start pulse signal STV, a clock signal CKV, and an enable to the two driving circuits.
  • POL polarity inversion signal
  • TP data latch signal
  • STV frame start pulse signal
  • CKV clock signal
  • a variety of control signals such as the signal OE, wherein the POL and TP control signals are used to control the data driving circuit, and the STV, CKV, and OE control signals are used to scan the driving circuit.
  • FIG. 1 is a schematic circuit diagram of a liquid crystal display driving system in the prior art.
  • the liquid crystal display driving system includes a timing control circuit 20', a data driving circuit 30', and a scan driving circuit 40'.
  • the data driving circuit 30' is directly connected to the timing control through a transmission line 31'.
  • the circuit 20' is configured to transmit a control signal
  • the scan drive circuit 40' is directly coupled to the timing control circuit 20' via an additional transmission line 41' to transmit a control signal.
  • a large number of connecting wires need to be disposed between the timing control circuit and the data driving circuit and the scan driving circuit, thereby enabling printing.
  • a large amount of wiring is required on the circuit board 10', and a large number of output pins, which not only increases the difficulty of the wiring design and the manufacturing process thereof, but also easily causes electromagnetic interference.
  • the technical problem to be solved by the present invention is to provide a liquid crystal display driving system which can reduce the number of wires on a Printed Circuit Board (PCB) and reduce the wiring area.
  • PCB Printed Circuit Board
  • an embodiment of the present invention provides a liquid crystal display driving system including a printed circuit board, a timing controller, a plurality of data drivers, and a plurality of scan drivers, and the timing controller and the a printed circuit board connection for converting the received control signal into a data control signal and a scan control signal; the liquid crystal display drive system further comprising an I2C bus, the I2C bus connecting the timing controller and the data a driver, the timing controller transmits the data control signal and the scan control signal to the data driver through a unified protocol through the I2C bus, and the scan driver is electrically connected to the data driver to receive The scan control signal is described.
  • the data driver is packaged in a flip chip.
  • the liquid crystal display driving system further includes a liquid crystal display substrate and a transmission wire, the transmission wire being connected between the data driver and the scan driver, and disposed on the flip chip and the liquid crystal display substrate And transmitting the scan control signal to the scan driver.
  • the transmission wire is an I2C bus, and the I2C bus is connected between the data driver and the scan driver.
  • the data driver sets an address by software or hardware for addressing by the I2C bus
  • the data driver further includes a shift register for receiving and temporarily storing the data control signal.
  • an embodiment of the present invention further provides a liquid crystal display driving method, including:
  • the timing controller converts control signals from the system into data control signals and scan control signals
  • the timing controller searches for an address of a preset data driver
  • the data driver feeds back a response signal to the timing controller;
  • the timing controller After receiving the response signal of the data driver, the timing controller transmits the data control signal and the scan control signal to the data driver through an I2C bus;
  • the data driver After receiving the data control signal and the scan control signal, the data driver inputs and temporarily stores the data control signal in a shift register, and transmits the scan control signal to a scan driver.
  • the address of the data driver is set by software or hardware to address the I2C bus.
  • the liquid crystal display driving system further includes a transmission line connected between the data driver and the scan driver for transmitting the scan control signal to the scan driver.
  • the transmission wire is an I2C bus, and the I2C bus is connected between the data driver and the scan driver.
  • the technical solution of the present invention has the beneficial effects that the present invention uses an I2C bus between the timing controller and the designated data driver, and transmits the data control signal and the scan control signal to the unified protocol.
  • the data driver transmits the scan control signal to the scan driver by the data driver, thereby eliminating the transmission line between the timing controller and the scan controller on the printed circuit board, reducing the trace on the printed circuit board, and reducing the wiring.
  • FIG. 1 is a circuit diagram of a liquid crystal display driving system in the prior art
  • FIG. 2 is a circuit diagram of a liquid crystal display driving system according to a first embodiment of the present invention
  • FIG. 3 is a circuit diagram of a liquid crystal display driving system according to a second embodiment of the present invention.
  • FIG. 4 is a flow chart of a liquid crystal display driving method in one embodiment of the present invention.
  • connection In the description of the present invention, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined.
  • the ground connection, or the integral connection may be a mechanical connection; it may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements.
  • the specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.
  • FIG. 2 is a schematic circuit diagram of a liquid crystal display driving system provided in the first embodiment of the present invention.
  • the liquid crystal display driving system of this embodiment includes: a printed circuit board (Printed Circuit) Board, PCB) 10, timing controller 20, a plurality of data drivers 30, a plurality of scan drivers 40, and a plurality of I2C (Inter-Integrated Circuit) buses 50.
  • the timing controller 20 is configured to convert a control signal from the system into a data control signal and a scan control signal, the data control signal being used to control the data driver 30, the scan control signal being used to control the scan driver 40.
  • the control signal includes: a data enable signal DE, a line sync signal HS, and a field sync signal VS; the data control signal includes a data control signal such as a polarity inversion signal POL, an output data enable signal OE, and the like.
  • the control signal includes a scan control signal such as a frame start pulse signal STV, a pulse signal TP, and a clock signal CKV.
  • the timing controller 20 is disposed on the printed circuit board 10 and electrically connected to the printed circuit board 10.
  • the I2C bus 50 is a bidirectional two-wire continuous bus that provides communication lines between integrated circuits.
  • the I2C bus 50 includes two transmission lines, one for serial data (SDA) lines and one for serial clocks. (SCL) line.
  • SDA serial data
  • SCL serial clocks.
  • the I2C bus 50 is connected to the timing controller 20 and the data driver 30 for transmitting the data control signal and the scan control signal together to a designated data driver in a unified I2C protocol. 30.
  • Each designated data driver 30 includes an address bit for setting an address for I2C addressing, which may be a fixed address set in hardware or may be set by software. Change the address.
  • Each of the data drivers 30 further includes a shift register. Specifically, after the data driver 30 receives the data control signal and the scan control signal, the data control signal is input and stored in the shift register. So that the data in the shift register can be output under the action of the shift pulse.
  • the scan driver 40 is coupled to the data driver 30 for receiving scan control signals from the data driver 30 to control scan timing.
  • the liquid crystal display driving system of the present invention can reduce the number of transmission lines for transmitting control signals to two by using the I2C bus 50, and is not limited by the type and number of control signals.
  • the I2C bus 50 is only connected between the timing controller 20 and the data driver 30, and is not electrically connected to the scan driver 40, the timing controller 20 and the scan driver are omitted.
  • the transmission wires for transmitting control signals between 40 therefore, reduce the number of wirings and wiring complexity on the printed circuit board 10.
  • the liquid crystal display driving system further includes a liquid crystal display substrate 60, which may be made of glass.
  • the data driver 30 includes a chip on film (COF) 32 through which the data driver 30 is packaged.
  • COF chip on film
  • the scan driver 40 and the data driver 30 and the scan driver 40 are electrically connected by a plurality of signal transmission wires 41 to transmit the scan control signal output by the data driver 30 to the scan driver 40.
  • the signal transmission wires 41 are disposed on the COF 32 and the liquid crystal display substrate 60 of the data driver 30. As shown in FIG. 2, the number of the transmission wires 41 is three, but in other embodiments, the transmission wires are The number of 41 is determined by the type and number of scan control signals.
  • FIG. 3 is a schematic circuit diagram of a liquid crystal display driving system according to a second embodiment of the present invention.
  • the circuit composition of the liquid crystal display driving system provided by the first embodiment shown in FIG. 2 is basically The same, except that the transmission wires between the data driver 30 and the scan driver 40 are different.
  • the present embodiment uses the I2C bus 50 to connect the data driver 30 and the scan driver 40 to transmit the scan control signal output from the data driver 30 to the scan driver 40.
  • the I2C bus 50 is disposed on the COF 32 of the data driver 30 and the liquid crystal display substrate 60.
  • the wiring on the liquid crystal display substrate 60 can be reduced, thereby reducing the width of the bezel of the liquid crystal display substrate 60.
  • the present invention further provides a liquid crystal display driving method.
  • the liquid crystal display driving method includes:
  • Step 101 The timing controller converts a control signal from the system into a data control signal and a scan control signal;
  • control signal includes: a data enable signal DE, a line sync signal HS, and a field sync signal VS;
  • data control signal includes: a polarity inversion signal POL, an output data enable signal OE
  • the scan control signal includes: a frame start pulse signal STV, a pulse signal TP, a clock signal CKV, and the like;
  • Step 102 The timing controller searches for an address of a preset data driver.
  • each of the designated data drivers includes an address bit for setting an address for I2C addressing, which may be a fixed address set in hardware, or Is a variable address set by software;
  • Step 103 After the timing controller finds the required address, the data driver feeds back a response signal to the timing controller.
  • Step 104 After receiving the response signal of the data driver, the timing controller transmits the data control signal and the scan control signal to the data driver through an I2C bus in a unified protocol;
  • the I2C bus is a bidirectional two-wire continuous bus that provides communication lines between integrated circuits
  • the I2C bus includes two transmission lines, and one is a serial data (SDA) line.
  • the I2C bus is connected to the timing controller and the data driver, and the I2C bus is configured to transmit the data control signal and the scan control signal together to a designated data driver by using a unified I2C protocol;
  • Step 105 After receiving the data control signal and the scan control signal, the data driver inputs and stores the data control signal in a shift register, so that data in the shift register can be in a shift pulse. The output is applied and the scan control signal is transmitted to the scan driver to control the scan clock.
  • the address of the preset data driver specifically, the address of the specified data driver may be set.
  • the timing controller finds the designated data driver through the set address, and in step 104, when the timing controller receives the response of the specified data driver
  • the data control signal and the scan control signal are transmitted to the designated data driver through the I2C bus according to the I2C protocol; in step 105, after the designated data driver receives the data control signal and the scan control signal, The data control signal is passed to other data drivers while the scan control signals are transmitted to a designated scan driver, which in turn transmits the scan control signals to other scan drivers.
  • the above technical solution enables the timing controller to transmit the original control signals in the prior art with fewer transmission lines by setting the I2C bus between the timing controller and the data driver, thereby reducing the wiring area on the printed circuit board and reducing the wiring difficulty.
  • the data driver in step 104, can transmit the scan control signal to a designated scan driver via an I2C bus.
  • the data driver address in step 102 can be specifically set by software.
  • the data drive address can be changed.
  • the data driver address is set in step 102, which may be specifically set by hardware, and the address is fixed.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
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Abstract

公开了一种液晶显示驱动系统，包括印制电路板（10）、时序控制器（20）、多个数据驱动器（30）和多个扫描驱动器（40），时序控制器（20）与印制电路板（10）连接，用于将接收到的控制信号转换为数据控制信号和扫描控制信号；液晶显示驱动系统还包括I2C总线（50），I2C总线（50）连接时序控制器（20）和数据驱动器（30），时序控制器（20）通过该I2C总线（50）以统一的协议将数据控制信号及扫描控制信号传输到数据驱动器（30），扫描驱动器（40）与数据驱动器（30）电性连接，以接收扫描控制信号。该液晶显示驱动系统可减少PCB板上的导线数目，减少布线面积。还公开了一种液晶显示驱动方法。

Description

一种液晶显示驱动系统及驱动方法
本申请要求于2015年08月12日向中国专利局提交、申请号为201510493236.8、发明名称为“一种液晶显示驱动系统及驱动方法”的中国专利申请的优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本发明涉及液晶显示领域，尤其涉及一种液晶显示驱动系统及一种液晶显示驱动方法。
背景技术
液晶显示装置在现今生活中扮演着越来越重要的角色，而液晶显示装置实现其显示功能需要复杂的显示驱动电路。在薄膜晶体管(Thin Film Transistor，TFT)液晶显示基板的显示驱动中，显示驱动电路通常包括时序控制电路(TCON IC)、数据驱动电路(Source Driver IC)、扫描驱动电路(Gate Driver IC)、灰阶电路和电源电路等。其中，数据驱动电路可将来自时序控制电路的与显示相关的信号变换为模拟电压，并输出到像素电极形成液晶偏转所需的电压；扫描驱动电路的输出端与TFT的栅极连接，有序地输出TFT的开关态电压。在实际应用中，时序控制电路与数据驱动电路、扫描驱动电路间通常使用微型低电压差分信号(mini-Low Voltage Differential Signaling，mini-LVDS)接口传输数据信号，因此，时序控制电路要向数据驱动电路和扫描驱动电路输出大量的差分信号，同时，时序控制电路还要向两个驱动电路输出极性反转信号POL、数据锁存信号TP、帧起始脉冲信号STV、时钟信号CKV和使能信号OE等多种控制信号，其中POL和TP控制信号用于控制数据驱动电路，STV、CKV和OE控制信号用于扫描驱动电路。
请参阅图1，图1是现有技术中液晶显示驱动系统的电路示意图。如图1所示，液晶显示驱动系统包括时序控制电路20′、数据驱动电路30′及扫描驱动电路40′，该数据驱动电路30′通过传输线31′直接连接至所述时序控 制电路20′以传输控制信号，该扫描驱动电路40′通过另外的传输导线41′直接连接至所述时序控制电路20′以传输控制信号。如此，加上别的连接导线(例如数据信号线)(未在图1中示出)后，则时序控制电路与数据驱动电路、扫描驱动电路之间需要设置大量的连接导线，从而使印制电路板10′上需要大量布线，且输出引脚众多，如此不但增大布线设计及其制程工艺的难度，也容易造成电磁干扰。
发明内容
本发明所要解决的技术问题在于，提供一种液晶显示驱动系统，所述液晶显示驱动系统不但可减少印制电路板(Printed Circuit Board，PCB)上的导线数目，而且可以减少布线面积。
为了解决上述技术问题，一方面，本发明的实施例提供了一种液晶显示驱动系统，包括印制电路板、时序控制器、多个数据驱动器和多个扫描驱动器，所述时序控制器与所述印制电路板连接，用于将接收到的控制信号转换为数据控制信号和扫描控制信号；所述液晶显示驱动系统还包括I2C总线，所述I2C总线连接所述时序控制器和所述数据驱动器，所述时序控制器通过该I2C总线以统一的协议将所述数据控制信号及所述扫描控制信号传输到所述数据驱动器，所述扫描驱动器与所述数据驱动器电性连接，以接收所述扫描控制信号。
其中，所述数据驱动器以覆晶薄膜封装。
其中，所述液晶显示驱动系统还包括液晶显示基板及传输导线，所述传输导线连接于所述数据驱动器和所述扫描驱动器之间，并设置于所述覆晶薄膜和所述液晶显示基板上，用以将所述扫描控制信号传输到所述扫描驱动器。
其中，所述传输导线是I2C总线，该I2C总线连接于所述数据驱动器和所述扫描驱动器之间。
其中，所述数据驱动器通过软件或硬件设定地址，以供所述I2C总线寻址
其中，所述数据驱动器还包括移位寄存器，用于接收并暂存所述数据控制信号。
另一方面，本发明的实施例还提供一种液晶显示驱动方法，包括：
时序控制器将来自系统的控制信号转换为数据控制信号和扫描控制信号；
所述时序控制器寻找预设的数据驱动器的地址；
所述时序控制器寻找到所需的地址后，所述数据驱动器反馈一应答信号至所述时序控制器；
所述时序控制器接到所述数据驱动器的应答信号后，将所述数据控制信号和所述扫描控制信号通过I2C总线传输给所述数据驱动器；
所述数据驱动器接收所述数据控制信号和所述扫描控制信号后，将所述数据控制信号输入并暂存于移位寄存器中，并将所述扫描控制信号传输到扫描驱动器。
其中，所述数据驱动器的地址通过软件或硬件设定地址，以供所述I2C总线寻址。
其中，所述液晶显示驱动系统还包括传输导线，所述传输导线连接于所述数据驱动器和所述扫描驱动器之间，用以将所述扫描控制信号传输到所述扫描驱动器。
其中，所述传输导线是I2C总线，该I2C总线连接于所述数据驱动器和所述扫描驱动器之间。
与现有技术相比，本发明的技术方案的有益效果在于：本发明在时序控制器和指定的数据驱动器之间采用了I2C总线，按统一的协议将数据控制信号和扫描控制信号都传输到数据驱动器，再由数据驱动器将扫描控制信号传输到扫描驱动器，从而省去了印制电路板上时序控制器与扫描控制器之间的传输导线，减少印制电路板上的走线，减少布线面积，同时，由于信号线减少，引脚变少，时序控制器的尺寸也可以相应减小。
附图说明
为了更清楚地说明本发明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发明的一些实施例，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获得其他的附图。
图1是现有技术中液晶显示驱动系统的电路示意图；
图2是本发明第一实施例提供的一种液晶显示驱动系统的电路示意图；
图3是本发明第二实施例提供的一种液晶显示驱动系统的电路示意图；
图4是本发明一个实施例中液晶显示驱动方法的流程图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明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发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
此外，以下各实施例的说明是参考附加的图示，用以例示本发明可用以实施的特定实施例。本发明中所提到的方向用语，例如，“上”、“下”、“前”、“后”、“左”、“右”、“内”、“外”、“侧面”等，仅是参考附加图式的方向，因此，使用的方向用语是为了更好、更清楚地说明及理解本发明，而不是指示或暗指所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸地连接，或者一体地连接；可以是机械连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
此外，在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上。若本说明书中出现“工序”的用语，其不仅是指独立的工序，在与其它工序无法明确区别时，只要能实现该工序所预期的作用则也包括在本用语中。另外，本说明书中用“-”表示的数值范围是指将“-”前后记载的数值分别作为最小值及最大值包括在内的范围。在附图中，结构相似或相同的单元用相同的标号表示。
请参阅图2，图2是本发明的第一实施例中提供的一种液晶显示驱动系统的电路示意图。本实施例的液晶显示驱动系统包括：印制电路板(Printed Circuit  Board，PCB)10、时序控制器20、多个数据驱动器30、多个扫描驱动器40及多个I2C(Inter－Integrated Circuit)总线50。
所述时序控制器20用于将来自系统的控制信号转换为数据控制信号和扫描控制信号，所述数据控制信号用于控制所述数据驱动器30，所述扫描控制信号用于控制所述扫描驱动器40。所述控制信号包括：数据使能信号DE、行同步信号HS和场同步信号VS；所述数据控制信号包括：极性反转信号POL、输出数据使能信号OE等数据控制信号，所述扫描控制信号包括：帧起始脉冲信号STV、脉冲信号TP、时钟信号CKV等扫描控制信号。所述时序控制器20设置于所述印制电路板10上，并与该印制电路板10电性连接。
所述I2C总线50为一个双向的两线连续总线，其提供集成电路之间的通信线路，该I2C总线50包括两根传输线，一根为串行数据(SDA)线，一根为串行时钟(SCL)线。具体为，所述I2C总线50连接所述时序控制器20与数据驱动器30，该I2C总线50用于以统一的I2C协议将所述数据控制信号和所述扫描控制信号一起传输到指定的数据驱动器30，每个指定的数据驱动器30都包含一个地址位，用于设定地址，以供I2C寻址，所述地址可以是在硬件上设置好的固定地址，也可以是用软件设定的可变地址。
每一所述数据驱动器30还包括移位寄存器，具体地，当所述数据驱动器30接收到所述数据控制信号和所述扫描控制信号后，将数据控制信号输入并存储于所述移位寄存器，使得该移位寄存器中的数据可以在移位脉冲的作用下输出。所述扫描驱动器40与所述数据驱动器30连接，用于接收来自数据驱动器30的扫描控制信号，以控制扫描时序。由于在印制电路板上用于传输控制信号的传输导线数目往往等于或大于控制信号种类的数目，例如，如果有七种控制信号，则至少要采用七根信号传输导线该控制信号，而基于本发明的液晶显示驱动系统，通过采用I2C总线50，可使得用于传输控制信号的传输导线减少为两根，不受控制信号种类和数量的限制。此外，由于所述I2C总线50仅连接于所述时序控制器20与数据驱动器30之间，而并没有与所述扫描驱动器40电性连接，从而省去了所述时序控制器20与扫描驱动器40之间的用于传输控制信号的传输导线，因此，减少了所述印制电路板10上的布线数量及布线复杂度。
仍然参阅图2，在本发明的实施例中，所述液晶显示驱动系统还包括液晶显示基板60，该液晶显示基板60可由玻璃制成。所述数据驱动器30包括覆晶薄膜(Chip on film，COF)32，该数据驱动器30通过所述COF 32进行封装。具体为，所述扫描驱动器40与所述数据驱动器30之间以及该扫描驱动器40之间通过多个信号传输导线41电性连接，以将该数据驱动器30输出的扫描控制信号传输给扫描驱动器40。所述信号传输导线41设置在数据驱动器30的COF 32和液晶显示基板60上，如图2中所示，该传输导线41的数目为3根，但在别的实施例中，所述传输导线41的数目由扫描控制信号的种类和数量而定。
请参阅图3，图3是本发明第二实施例提供的一种液晶显示驱动系统的电路示意图，本实施例与图2所示的第一实施例所提供的液晶显示驱动系统的电路组成基本相同，只是数据驱动器30和扫描驱动器40之间的传输导线不同。本实施例采用I2C总线50连接数据驱动器30和扫描驱动器40，以将所述数据驱动器30输出的扫描控制信号传输给扫描驱动器40。所述I2C总线50设置于数据驱动器30的COF 32和液晶显示基板60上。这样，可以减少液晶显示基板60上的走线，从而减小液晶显示基板60的边框的宽度。
请参阅图4，本发明还提供了一种液晶显示驱动方法，在本发明的实施例中，所述液晶显示驱动方法包括：
步骤101：时序控制器将来自系统的控制信号转换为数据控制信号和扫描控制信号；
在本发明的实施例中，所述控制信号包括：数据使能信号DE、行同步信号HS和场同步信号VS；所述数据控制信号包括：极性反转信号POL、输出数据使能信号OE等，所述扫描控制信号包括：帧起始脉冲信号STV、脉冲信号TP、时钟信号CKV等；
步骤102：所述时序控制器寻找预设的数据驱动器的地址；
在本发明的实施例中，每个指定的数据驱动器都包含一个地址位，用于设定地址，以供I2C寻址，所述地址可以是在硬件上设置好的固定地址，也可以 是用软件设定的可变地址；
步骤103：所述时序控制器寻找到所需的地址后，所述数据驱动器反馈一应答信号至所述时序控制器；
步骤104：所述时序控制器接到所述数据驱动器的应答信号后，将所述数据控制信号和所述扫描控制信号以统一的协议通过I2C总线传输给所述数据驱动器；
在本发明的实施例中，所述I2C总线为一个双向的两线连续总线，其提供集成电路之间的通信线路，该I2C总线包括两根传输线，一根为串行数据(SDA)线，一根为串行时钟(SCL)线。具体为，所述I2C总线连接所述时序控制器与数据驱动器，该I2C总线用于以统一的I2C协议将所述数据控制信号和所述扫描控制信号一起传输到指定的数据驱动器；
步骤105：所述数据驱动器接收所述数据控制信号和所述扫描控制信号后，将所述数据控制信号输入并存储于移位寄存器中，使得该移位寄存器中的数据可以在移位脉冲的作用下输出，并将所述扫描控制信号传输到扫描驱动器，以控制扫描时钟。
步骤102中所述预设的数据驱动器的地址，具体地，可以只设定指定的数据驱动器的地址。当只设定指定的数据驱动器的地址时，所述时序控制器通过所设定的地址寻找所指定的数据驱动器，在步骤104中，当所述时序控制器接收到所指定的数据驱动器的应答信号后，将数据控制信号和扫描控制信号按I2C协议通过I2C总线传输给所指定的数据驱动器；在步骤105中，所指定的数据驱动器接收所述数据控制信号和所述扫描控制信号后，将所述数据控制信号传递给其他数据驱动器，同时，将所述扫描控制信号传输给指定的扫描驱动器，所述指定的扫描驱动器再将所述扫描控制信号传输给其它扫描驱动器。
上述技术方案通过在时序控制器和数据驱动器间设置I2C总线，而使时序控制器以更少的传输线传输现有技术中原有的控制信号，减少印制电路板上的布线面积，降低布线难度。
在一个实施例中，步骤104中，所述数据驱动器可以通过I2C总线将所述扫描控制信号传输给指定的扫描驱动器。
在一个实施例中，步骤102中所述数据驱动器地址，具体可以通过软件设 定，所述数据驱动器地址可以改变。
在一个实施例中，步骤102中设定数据驱动器地址，具体可以通过硬件设定，所述地址是固定的。
以上所述的实施例，并不构成对该技术方案保护范围的限定。任何在上述实施例的精神和原则之内所作的修改、等同替换和改进等，均应包含在该技术方案的保护范围之内。

Claims (10)

  1. 一种液晶显示驱动系统，包括印制电路板、时序控制器、多个数据驱动器和多个扫描驱动器，所述时序控制器与所述印制电路板连接，用于将接收到的控制信号转换为数据控制信号和扫描控制信号，其特征在于，所述液晶显示驱动系统还包括I2C总线，所述I2C总线连接所述时序控制器和所述数据驱动器，所述时序控制器通过该I2C总线以统一的协议将所述数据控制信号及所述扫描控制信号传输到所述数据驱动器，所述扫描驱动器与所述数据驱动器电性连接，以接收所述扫描控制信号。
  2. 根据权利要求1所述的液晶显示驱动系统，其特征在于，所述数据驱动器以覆晶薄膜封装。
  3. 根据权利要求2所述的液晶显示驱动系统，其特征在于，所述液晶显示驱动系统还包括液晶显示基板及传输导线，所述传输导线连接于所述数据驱动器和所述扫描驱动器之间，并设置于所述覆晶薄膜和所述液晶显示基板上，用以将所述扫描控制信号传输到所述扫描驱动器。
  4. 根据权利要求3所述的液晶显示驱动系统，其特征在于，所述传输导线是I2C总线，该I2C总线连接于所述数据驱动器和所述扫描驱动器之间。
  5. 根据权利要求1所述的液晶显示驱动系统，其特征在于，所述数据驱动器通过软件或硬件设定地址，以供所述I2C总线寻址。
  6. 根据权利要求1至5任一项所述的液晶显示驱动系统，其特征在于，所述数据驱动器还包括移位寄存器，用于接收并暂存所述数据控制信号。
  7. 一种液晶显示驱动方法，其特征在于，包括：
    时序控制器将来自系统的控制信号转换为数据控制信号和扫描控制信号；
    所述时序控制器寻找预设的数据驱动器的地址；
    所述时序控制器寻找到所需的地址后，所述数据驱动器反馈一应答信号至所述时序控制器；
    所述时序控制器接到所述数据驱动器的应答信号后，将所述数据控制信号和所述扫描控制信号通过I2C总线传输给所述数据驱动器；
    所述数据驱动器接收所述数据控制信号和所述扫描控制信号后，将所述数 据控制信号输入并暂存于移位寄存器中，并将所述扫描控制信号传输到扫描驱动器。
  8. 根据权利要求7所述的液晶显示驱动方法，其特征在于，所述数据驱动器的地址通过软件或硬件设定地址，以供所述I2C总线寻址。
  9. 根据权利要求7所述的液晶显示驱动方法，其特征在于，所述液晶显示驱动系统还包括传输导线，所述传输导线连接于所述数据驱动器和所述扫描驱动器之间，用以将所述扫描控制信号传输到所述扫描驱动器。
  10. 根据权利要求9所述的液晶显示驱动方法，其特征在于，所述传输导线是I2C总线，该I2C总线连接于所述数据驱动器和所述扫描驱动器之间。
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