WO2018036097A1 - 一种降低电磁干扰的驱动方法及驱动装置 - Google Patents

一种降低电磁干扰的驱动方法及驱动装置 Download PDF

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WO2018036097A1
WO2018036097A1 PCT/CN2017/071487 CN2017071487W WO2018036097A1 WO 2018036097 A1 WO2018036097 A1 WO 2018036097A1 CN 2017071487 W CN2017071487 W CN 2017071487W WO 2018036097 A1 WO2018036097 A1 WO 2018036097A1
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data
chip
cof
timing controller
flip chip
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PCT/CN2017/071487
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English (en)
French (fr)
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黄笑宇
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深圳市华星光电技术有限公司
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Priority to US15/500,111 priority Critical patent/US10347202B2/en
Publication of WO2018036097A1 publication Critical patent/WO2018036097A1/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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • 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
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
    • 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
    • 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
    • G09G2370/14—Use of low voltage differential signaling [LVDS] for display data communication

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular to a driving method and a driving device for reducing electromagnetic interference in a TFT-LCD.
  • TFT-LCD Thin Film Transistor Liquid Crystal Display
  • the system motherboard connects the R/G/B compression signal, control signal and power through the wire to the connector on the PCB board, and the data passes through the timing controller TCON (Timing Controller, timing controller) on the PCB.
  • TCON Timing Controller, timing controller
  • EMI Electromagnetic Interference
  • the essence of the EMI test is to detect the energy value of the product radiated at each frequency segment.
  • the differential signal of the mini-LVDS signal communicated between the timing controller TCON and the data flip chip S-COF is strongly correlated with the maximum swing of the reference voltage, and the EMI test result.
  • the larger the Swing value the larger the energy value of the frequency point, and the worse the result of EMI.
  • the smaller the Swing value the better the EMI result, but the data flip chip S-COF may not be able to read the data correctly.
  • the present application proposes a driving method and a driving device for reducing electromagnetic interference.
  • a driving method for reducing electromagnetic interference according to the present invention is:
  • the No. 2 chip verifies that the data transmitted from the No. 1 chip is correct, and the Swing value of the transmitted data is the smallest, the No. 1 chip and the No. 2 chip maintain the original data transmission parameters.
  • the initial value of the Swing data is set to a minimum value.
  • the Swing value of the data transmitted at this time is adjusted to a level until the No. 2 chip verifies the No. 1 chip. The transmitted data is correct.
  • the No. 2 chip verifies that the data transmitted from the No. 1 chip is correct according to:
  • the data received by chip 2 is the same as the initial data A of the built-in memory.
  • the No. 1 chip is a timing controller TCON
  • the No. 2 chip is a data flip chip S-COF.
  • the specific driving method of the data flip chip S-COF and the timing controller TCON is:
  • the lock signal of the data flip chip S-COF is initially a logic voltage low level, and the data flip chip S-COF receives the first line of data transmitted by the timing controller TCON, when the data flip chip S- When the data received by the COF is different from the built-in initial data A, the Lock signal output does not change, and the data flip chip S-COF continues to receive the next row of data; when the data is overlaid on the S-COF and the built-in initial data When A is the same, the Lock signal output is a logic voltage high level, and the data flip chip S-COF maintains the original data transmission parameters;
  • the timing controller TCON first outputs the initial data A stored by the data flip chip S-COF;
  • the timing controller TCON When the timing controller TCON detects that the Lock signal is low, the timing controller TCON adjusts the Swing value of the transmission data mini-LVDS to one level, and re-outputs the initial data A;
  • the timing controller TCON When the timing controller TCON detects that the Lock signal is high, the timing controller TCON maintains the original data transmission parameters and transmits data to the data flip chip S-COF.
  • the invention also provides a driving device for reducing electromagnetic interference, the driving device comprising a chip No. 1 and a chip No. 2;
  • the No. 1 chip is used to transmit data to the No. 2 chip.
  • the original data transmission parameter is kept working.
  • the Swing value of the transmitted data is increased.
  • the No. 2 chip judges whether the read transmission data is correct, and returns the judgment result to the No. 1 chip. If it is correct, the original data transmission parameters are kept working.
  • the initial value of the Swing of the transmission data is set to a minimum value.
  • the determining whether the read transmission data is correct is specifically:
  • the data received by the chip No. 2 is the same as the initial data A of the built-in memory, if the same, it is judged that the read transfer data is correct, and if it is different, it is determined that the read transfer data is incorrect.
  • the No. 1 chip is a timing controller TCON
  • the No. 2 chip is a data flip chip S-COF.
  • the data flip chip S-COF the specific driving process is:
  • the Lock signal is initially a logic voltage low level, and receives the first line of data transmitted by the timing controller TCON.
  • the Lock signal output does not change, and continues to receive.
  • One line of data when the received data is the same as the built-in initial data A, the Lock signal output is a logic voltage high level, keeping the original data transmission parameters working;
  • the timing controller TCON the specific driving process is:
  • the timing controller TCON first outputs the initial data A stored by the data flip chip S-COF;
  • the Swing value of the transmission data mini-LVDS is adjusted to one level, and the initial data A is re-outputted;
  • the driving device and the driving method in the technical solution can effectively reduce EMI, and can simplify the Swing adjustment process in the product development process and accelerate the product development progress.
  • both correct transmission and EMI are guaranteed.
  • Figure 1 shows a schematic diagram of the principle of the existing PCB board and display area
  • FIG. 1 shows the schematic diagram of the timing controller TCON and the data flip-chip S-COF drive.
  • Embodiment 1 provides a driving method for reducing electromagnetic interference when transmitting a differential signal, including:
  • the No. 2 chip verifies that the data transmitted from the No. 1 chip is correct, and the Swing value of the transmitted data is the smallest, the No. 1 chip and the No. 2 chip maintain the original data transmission parameters.
  • the initial value of the Swing data is set to a minimum value.
  • the Swing value of the data transmitted at this time is adjusted to a level until the No. 2 chip. Verify that the data transmitted by the No. 1 chip is correct.
  • the No. 2 chip verifies that the data transmitted from the No. 1 chip is correct as follows:
  • the data received by the No. 2 chip is the same as the initial data A of the built-in memory.
  • the No. 1 chip transmits the same initial data A to the No. 2 chip.
  • it is verified whether the No. 1 chip can correctly transmit the data that is, the transmission Whether the energy of the Swing value of the data is sufficient to transmit the data;
  • the first chip is a timing controller TCON (Timing Controller)
  • the second chip is a data flip chip S-COF (Source-Chip on Film).
  • the specific driving method of the data flip chip S-COF and the timing controller TCON is:
  • the lock signal of the data flip chip S-COF is initially a logic voltage low level, and the data flip chip S-COF receives the first line of data transmitted by the timing controller TCON, when the data flip chip S- When the data received by the COF is different from the built-in initial data A, the Lock signal output does not change, and the data flip chip S-COF continues to receive the next row of data; when the data is overlaid on the S-COF and the built-in initial data When A is the same, the Lock signal output is a logic voltage high level data flip chip S-COF keeps the original data transmission parameters working;
  • the timing controller TCON first outputs the initial data A stored by the data flip chip S-COF;
  • the timing controller TCON When the timing controller TCON detects that the Lock signal is low, the timing controller TCON adjusts the Swing value of the transmission data mini-LVDS to one level, and re-outputs the initial data A;
  • the timing controller TCON When the timing controller TCON detects that the Lock signal is high, the timing controller TCON maintains the original data transmission parameters and transmits data to the data flip chip S-COF.
  • the initial Swing value of the differential signal is set to a minimum. Then, if the transmission is not correct, the No. 1 chip gradually adjusts the number of Swing values of the transmitted differential signal until it is correctly received.
  • EMI is the minimum that guarantees the correct transmission of differential signals, completing the drive.
  • the driving method for reducing electromagnetic interference when transmitting differential signals in the technical solution can effectively reduce EMI, and can simplify the Swing adjustment process in the product development process and accelerate product development progress.
  • both correct transmission and EMI are guaranteed.
  • This embodiment is applicable to the driving of differential signal transmission between chips, and can effectively reduce EMI. And can simplify production During the product development process, Swing adjusts the process and accelerates product development.
  • a driving device for reducing electromagnetic interference includes a chip No. 1 and a chip No. 2;
  • the No. 1 chip is used to transmit data to the No. 2 chip.
  • the original data transmission parameter is kept working.
  • the Swing value of the transmitted data is increased.
  • the No. 2 chip judges whether the read transmission data is correct, and returns the judgment result to the No. 1 chip. If it is correct, the original data transmission parameters are kept working.
  • the initial value of the Swing of the transmitted data is set to a minimum value.
  • the determining whether the read transmission data is correct is specifically:
  • the data received by the chip No. 2 is the same as the initial data A of the built-in memory, if the same, it is judged that the read transfer data is correct, and if it is different, it is determined that the read transfer data is incorrect.
  • the chip No. 1 is a timing controller TCON
  • the chip No. 2 is a data flip chip S-COF.
  • the present embodiment provides a driving method for reducing electromagnetic interference in a TFT-LCD, which is implemented based on a timing controller TCON and a data flip chip S-COF:
  • the timing controller TCON In the TFT-LCD, the timing controller TCON generates video data through the data flip chip S-COF to the display area, that is, transmits the data mini-LVDS. In this embodiment, the timing controller TCON guarantees that the data can be transmitted mini-LVDS. EMI is minimized when properly transferred to the data flip-chip S-COF.
  • the data overlay circuit S-COF is used to compare the received transmission data with the built-in initial data A to determine whether the received data is correct. If not, the timing controller TCON transmits the data to the mini-LVDS. The value is adjusted accordingly, and finally the Swing value is a minimum value for ensuring that the data flip chip S-COF can smoothly read data.
  • the data flip chip S-COF internally stores an initial data A
  • the lock signal of the data flip chip S-COF is initially a logic voltage low level, and the data flip chip S-COF receives the first line of data transmitted by the timing controller TCON, when the data flip chip S- When the data received by the COF is different from A, the Lock output does not change, and the data flip chip S-COF continues to receive the next line of data; when the data received by the data flip chip S-COF is the same as A, the Lock output is a logic voltage. High level, the data flip chip S-COF starts normal operation and keeps the original data transmission parameters working.
  • the timing controller TCON first outputs the initial data A stored by the data flip chip S-COF;
  • the timing controller TCON When the timing controller TCON detects that Lock is low, the timing controller TCON internally adjusts the Swing of the mini-LVDS to a level, and re-outputs the data A;
  • timing controller TCON When the timing controller TCON detects that Lock is high, the timing controller TCON starts to work normally, and transmits data to the data flip chip S-COF;
  • the Swing value of the mini-LVDS is first set to a minimum value. Each time the power is turned on, if the data flip chip S-COF cannot read the data correctly, the Lock signal is low, and the timing controller TCON adjusts the Swing value by one level until the data flip chip S-COF can read correctly. Take the data.
  • the Swing value of the mini-LVDS at this time is the minimum value of the sample sample to ensure that the data flip chip S-COF can read data smoothly.
  • the electromagnetic interference reducing driving device in the technical solution can effectively reduce EMI, and can simplify the Swing adjustment process in the product development process and accelerate the product development progress.
  • both correct transmission and EMI are guaranteed.
  • the minimum value of the mini-LVDS signal Swing can be obtained according to the timing controller TCON and the data flip chip S-COF in each sample, and finally the EMI is reduced.
  • the method of the embodiment can also be written into a software program, and the corresponding functions are respectively embedded into the timing controller TCON and the data flip chip S-COF to implement the driving device.

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Abstract

提出了一种降低电磁干扰的驱动方法及驱动装置。对数据覆晶薄膜S‑COF和时序控制器TCON驱动为：时序控制器TCON先输出数据覆晶薄膜S‑COF存储的初始数据A；利用数据覆晶薄膜S‑COF对于接收到的传输数据与内建初始数据A的比对，判断接收的数据是否正确，若否，时序控制器TCON对传输数据mini‑LVDS的Swing值进行相应调节。

Description

一种降低电磁干扰的驱动方法及驱动装置
相关技术的交叉引用
本申请要求享有2016年8月25日提交的名称为“一种降低电磁干扰的驱动方法及驱动装置”的中国专利申请为CN201610719242.5的优先权，其全部内容通过引用并入本文中。
技术领域
本发明涉及液晶显示技术领域，特别涉及一种用于TFT-LCD中降低电磁干扰的驱动方法及驱动装置。
背景技术
TFT-LCD(Thin Film Transistor Liquid Crystal Display，薄膜晶体管液晶显示器)是当前平板显示的主要品种之一，已经成为了现代IT、视讯产品中重要的显示平台。TFT-LCD主要驱动原理，系统主板将R/G/B压缩信号、控制信号及动力通过线材与PCB板上的connector相连接，数据经过PCB板上的时序控制器TCON(Timing Controller，时序控制器)IC处理后，经PCB板，通过数据覆晶薄膜S-COF(Source-Chip on Film，数据覆晶薄膜)和G-COF(Gate-Chip on Film，栅极覆晶薄膜)与显示区连接，从而使得LCD获得所需的电源、信号，如图1所示。
实际的产品开发检测过程中，法规有规定需要进行EMI(Electromagnetic Interference,电磁干扰)测试，旨在防止产品对周围的物品或人体造成不良的影响。EMI测试的实质是检测产品在每个频率段辐射的能量值。其中，时序控制器TCON与数据覆晶薄膜S-COF之间通讯的mini-LVDS信号的差分信号相对基准电压的最大摆幅Swing，与EMI测试结果强相关。Swing值越大，该频率点的能量值越大，则EMI的结果越差。而Swing值越小，则EMI的结果越好，但可能会造成数据覆晶薄膜S-COF无法正确读取数据。
发明内容
针对上述现有技术中的问题，本申请提出了一种降低电磁干扰的驱动方法及驱动装置。
本发明的一种降低电磁干扰的驱动方法，所述驱动方法为：
当2号芯片验证从1号芯片传输来的数据为正确，且传输数据的Swing值最小时，1号芯片和2号芯片保持原数据传输参数工作。
优选的，传输数据的Swing初始值设为最小值，当2号芯片验证1号芯片传输的数据不正确时，将此时传输数据的Swing值调大一级，直到2号芯片验证1号芯片传输的数据为正确。
优选的，2号芯片验证从1号芯片传输来的数据为正确的依据为：
2号芯片接收的数据与内建存储的初始数据A相同。
优选的，所述1号芯片为时序控制器TCON，2号芯片为数据覆晶薄膜S-COF。
优选的，所述数据覆晶薄膜S-COF和时序控制器TCON的具体驱动方法为：
每次开机时，数据覆晶薄膜S-COF的Lock信号初始为逻辑电压低电平，数据覆晶薄膜S-COF会接收时序控制器TCON传输的第一行数据，当数据覆晶薄膜S-COF接收到的数据与内建初始数据A不同时，Lock信号输出不改变，数据覆晶薄膜S-COF继续接收下一行数据；当数据覆晶薄膜S-COF接受到的数据与内建初始数据A相同时，Lock信号输出为逻辑电压高电平，数据覆晶薄膜S-COF保持原数据传输参数工作；
每次开机时，时序控制器TCON先输出数据覆晶薄膜S-COF存储的初始数据A；
当时序控制器TCON侦测到Lock信号为低电平时，时序控制器TCON将传输数据mini-LVDS的Swing值调大一级，重新输出初始数据A；
当时序控制器TCON侦测到Lock信号为高电平时，时序控制器TCON保持原数据传输参数工作，向数据覆晶薄膜S-COF传输数据。
本发明还提出一种降低电磁干扰的驱动装置，所述驱动装置包括1号芯片和2号芯片；
1号芯片，用于向2号芯片传输数据，当确定2号芯片读取数据正确时，保持原数据传输参数工作，当确定2号芯片读取数据不正确，将传输数据的Swing值调大一级；
2号芯片，判断读取的传输数据是否正确，将判断结果返回至1号芯片，若正确，保持原数据传输参数工作。
优选的，所述传输数据的Swing的初始值设为最小值。
优选的，所述判断读取的传输数据是否正确具体为：
2号芯片接收的数据是否与内建存储的初始数据A相同，若相同，则判断为读取传输数据正确，若不同，则判断为读取传输数据不正确。
优选的，所述1号芯片为时序控制器TCON，2号芯片为数据覆晶薄膜S-COF。
优选的，所述数据覆晶薄膜S-COF，具体驱动过程为：
每次开机时，Lock信号初始为逻辑电压低电平，接收时序控制器TCON传输的第一行数据，当接收到的数据与内建初始数据A不同时，Lock信号输出不改变，继续接收下一行数据；当接受到的数据与内建初始数据A相同时，Lock信号输出为逻辑电压高电平，保持原数据传输参数工作；
所述时序控制器TCON，具体驱动过程为：
时序控制器TCON先输出数据覆晶薄膜S-COF存储的初始数据A；
当侦测到Lock信号为低电平时，将传输数据mini-LVDS的Swing值调大一级，重新输出初始数据A；
当侦测到Lock信号为高电平时，保持原数据传输参数工作，向数据覆晶薄膜S-COF传输数据。
上述技术方案的有益效果：
本技术方案中的驱动装置和驱动方法可有效降低EMI，且可以简化产品开发过程中对Swing调节过程，加快产品开发进度。特别是在时序控制器TCON与数据覆晶薄膜S-COF之间的传输数据mini-LVDS时，既保证了正确传输，还降低了EMI。
附图说明
在下文中将基于实施例并参考附图来对本发明进行更详细的描述。其中：
图1显示了现有PCB板与显示区的原理示意图；
图2显示了时序控制器TCON和数据覆晶薄膜S-COF驱动的原理示意图。
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作出创造性劳动的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。
需要说明的是，在不冲突的情况下，本发明中的实施例及实施例中的特征可以相互组合。
下面结合附图和具体实施例对本发明作进一步说明，但不作为本发明的限定。
实施例1：本实施方式提供一种用于传输差分信号时降低电磁干扰的驱动方法，包括：
当2号芯片验证从1号芯片传输来的数据为正确，且传输数据的Swing值最小时，1号芯片和2号芯片保持原数据传输参数工作。
在优选的实施例中，传输数据的Swing初始值设为最小值，当2号芯片验证1号芯片传输的数据不正确时，将此时传输数据的Swing值调大一级，直到2号芯片验证1号芯片传输的数据为正确。
2号芯片验证从1号芯片传输来的数据为正确具体为：
2号芯片接收的数据与内建存储的初始数据A相同，1号芯片将同样的初始数据A传输至2号芯片，通过对比，验证1号芯片是否能将数据正确传输过来，即：传输的数据的Swing值的能量是否足够把数据传输过来；
进一步地，1号芯片为时序控制器TCON(Timing Controller)，2号芯片为数据覆晶薄膜S-COF(Source-Chip on Film)。
在优选的实施例中，数据覆晶薄膜S-COF和时序控制器TCON的具体驱动方法为：
每次开机时，数据覆晶薄膜S-COF的Lock信号初始为逻辑电压低电平，数据覆晶薄膜S-COF会接收时序控制器TCON传输的第一行数据，当数据覆晶薄膜S-COF接收到的数据与内建初始数据A不同时，Lock信号输出不改变，数据覆晶薄膜S-COF继续接收下一行数据；当数据覆晶薄膜S-COF接受到的数据与内建初始数据A相同时，Lock信号输出为逻辑电压高电平数据覆晶薄膜S-COF保持原数据传输参数工作；
每次开机时，时序控制器TCON先输出数据覆晶薄膜S-COF存储的初始数据A；
当时序控制器TCON侦测到Lock信号为低电平时，时序控制器TCON将传输数据mini-LVDS的Swing值调大一级，重新输出初始数据A；
当时序控制器TCON侦测到Lock信号为高电平时，时序控制器TCON保持原数据传输参数工作，向数据覆晶薄膜S-COF传输数据。
而为了保证传输的差分信号的EMI最小，差分信号的初始Swing值设为最小，之后如果传输不正确，1号芯片再逐渐调节传输的差分信号的Swing值的级数，直至正确接收，此时EMI是保证差分信号的正确传输的最小值，完成驱动。
在本技术方案中用于传输差分信号时降低电磁干扰的驱动方法可有效降低EMI，且可以简化产品开发过程中对Swing调节过程，加快产品开发进度。特别是在时序控制器TCON与数据覆晶薄膜S-COF之间的传输数据mini-LVDS时，既保证了正确传输，还降低了EMI。
本实施方式适用任何芯片间差分信号传输的驱动，能有效降低EMI。且可以简化产 品开发过程中对Swing调节过程，加快产品开发进度。
实施例2：
结合图2说明本实施方式，一种降低电磁干扰的驱动装置，所述驱动装置包括1号芯片和2号芯片；
1号芯片，用于向2号芯片传输数据，当确定2号芯片读取数据正确时，保持原数据传输参数工作，当确定2号芯片读取数据不正确，将传输数据的Swing值调大一级；
2号芯片，判断读取的传输数据是否正确，将判断结果返回至1号芯片，若正确，保持原数据传输参数工作。
在优选的实施例中，所述传输数据的Swing的初始值设为最小值。
在优选的实施例中，所述判断读取的传输数据是否正确具体为：
2号芯片接收的数据是否与内建存储的初始数据A相同，若相同，则判断为读取传输数据正确，若不同，则判断为读取传输数据不正确。
在优选的实施例中，所述1号芯片为时序控制器TCON，2号芯片为数据覆晶薄膜S-COF。
本实施方式提供一种用于TFT-LCD中的降低电磁干扰的驱动方法，基于时序控制器TCON和数据覆晶薄膜S-COF实现：
在TFT-LCD中时序控制器TCON通过数据覆晶薄膜S-COF向显示区发生视频资料，即传输数据mini-LVDS，本实施方式给出了时序控制器TCON在保证能将传输数据mini-LVDS正确传输给数据覆晶薄膜S-COF时，使EMI最小。
本实施方式给利用数据覆晶薄膜S-COF对于接收到的传输数据与内建初始数据A的比对，判断接收的数据是否正确，若否，时序控制器TCON对传输数据mini-LVDS的Swing值进行相应调节，最终实现该Swing值为保证数据覆晶薄膜S-COF能够顺利读取数据的最小值。
具体过程如下：数据覆晶薄膜S-COF的工作过程：
数据覆晶薄膜S-COF内部存储一笔初始数据A；
每次开机时，数据覆晶薄膜S-COF的Lock信号初始为逻辑电压低电平，数据覆晶薄膜S-COF会接收时序控制器TCON传输的第一行数据，当数据覆晶薄膜S-COF接收到的数据与A不同时，Lock输出不改变，数据覆晶薄膜S-COF继续接收下一行数据；当数据覆晶薄膜S-COF接受到的数据与A相同时，Lock输出为逻辑电压高电平，数据覆晶薄膜S-COF开始正常工作，保持原数据传输参数工作。
时序控制器TCON的工作过程：
每次开机时，时序控制器TCON先输出数据覆晶薄膜S-COF存储的初始数据A；
当时序控制器TCON侦测到Lock为低电平时，时序控制器TCON内部将mini-LVDS的Swing调大一级，重新输出数据A；
当时序控制器TCON侦测到Lock为高电平时，时序控制器TCON开始正常工作，向数据覆晶薄膜S-COF传输数据；
本实施方式中，先将mini-LVDS的Swing值设为最小值。每次开机时，如果数据覆晶薄膜S-COF无法正确读取数据，则Lock信号为低电平，时序控制器TCON将Swing值调大一级，直到数据覆晶薄膜S-COF能够正确读取数据为止。此时的mini-LVDS的Swing值，是此片样品保证数据覆晶薄膜S-COF能够顺利读取数据的最小值。
本技术方案中的降低电磁干扰的驱动装置可有效降低EMI，且可以简化产品开发过程中对Swing调节过程，加快产品开发进度。特别是在时序控制器TCON与数据覆晶薄膜S-COF之间的传输数据mini-LVDS时，既保证了正确传输，还降低了EMI。
综上，可根据每片样品中时序控制器TCON和数据覆晶薄膜S-COF的能力，得到mini-LVDS信号Swing的最小值，最终降低EMI。
同时，本实施方式的方法还可以写成软件程序，相应功能分别嵌入至时序控制器TCON和数据覆晶薄膜S-COF，实现驱动装置。
虽然在本文中参照了特定的实施方式来描述本发明，但是应该理解的是，这些实施例仅仅是本发明的原理和应用的示例。因此应该理解的是，可以对示例性的实施例进行许多修改，并且可以设计出其他的布置，只要不偏离所附权利要求所限定的本发明的精神和范围。应该理解的是，可以通过不同于原始权利要求所描述的方式来结合不同的从属权利要求和本文中所述的特征。还可以理解的是，结合单独实施例所描述的特征可以使用在其他所述实施例中。

Claims (16)

  1. 一种降低电磁干扰的驱动方法，所述驱动方法为：
    当2号芯片验证从1号芯片传输来的数据为正确，且传输数据的摆幅值最小时，1号芯片和2号芯片保持原数据传输参数工作。
  2. 根据权利要求1所述的一种降低电磁干扰的驱动方法，其中，传输数据的摆幅初始值设为最小值，当2号芯片验证1号芯片传输的数据不正确时，将此时传输数据的摆幅值调大一级，直到2号芯片验证1号芯片传输的数据为正确。
  3. 根据权利要求1所述的一种降低电磁干扰的驱动方法，其中，
    2号芯片验证从1号芯片传输来的数据为正确的依据为：
    2号芯片接收的数据与内建存储的初始数据A相同。
  4. 根据权利要求2所述的一种降低电磁干扰的驱动方法，其中，
    2号芯片验证从1号芯片传输来的数据为正确的依据为：
    2号芯片接收的数据与内建存储的初始数据A相同。
  5. 根据权利要求3所述的一种降低电磁干扰的驱动方法，其中，所述1号芯片为时序控制器TCON，2号芯片为数据覆晶薄膜S-COF。
  6. 根据权利要求4所述的一种降低电磁干扰的驱动方法，其中，所述1号芯片为时序控制器TCON，2号芯片为数据覆晶薄膜S-COF。
  7. 根据权利要求5所述的一种降低电磁干扰的驱动方法，其中，所述数据覆晶薄膜S-COF和时序控制器TCON的具体驱动方法为：
    每次开机时，数据覆晶薄膜S-COF的Lock信号(锁定信号)初始为逻辑电压低电平，数据覆晶薄膜S-COF会接收时序控制器TCON传输的第一行数据，当数据覆晶薄膜S-COF接收到的数据与内建初始数据A不同时，Lock信号输出不改变，数据覆晶薄膜S-COF继续接收下一行数据；当数据覆晶薄膜S-COF接受到的数据与内建初始数据A相同时，Lock信号输出为逻辑电压高电平，数据覆晶薄膜S-COF保持原数据传输参数工作；
    每次开机时，时序控制器TCON先输出数据覆晶薄膜S-COF存储的初始数据A；
    当时序控制器TCON侦测到Lock信号为低电平时，时序控制器TCON将传输数据mini-LVDS的摆幅值调大一级，重新输出初始数据A；
    当时序控制器TCON侦测到Lock信号为高电平时，时序控制器TCON保持原数据传输参数工作，向数据覆晶薄膜S-COF传输数据。
  8. 根据权利要求6所述的一种降低电磁干扰的驱动方法，其中，所述数据覆晶薄膜 S-COF和时序控制器TCON的具体驱动方法为：
    每次开机时，数据覆晶薄膜S-COF的Lock信号(锁定信号)初始为逻辑电压低电平，数据覆晶薄膜S-COF会接收时序控制器TCON传输的第一行数据，当数据覆晶薄膜S-COF接收到的数据与内建初始数据A不同时，Lock信号输出不改变，数据覆晶薄膜S-COF继续接收下一行数据；当数据覆晶薄膜S-COF接受到的数据与内建初始数据A相同时，Lock信号输出为逻辑电压高电平，数据覆晶薄膜S-COF保持原数据传输参数工作；
    每次开机时，时序控制器TCON先输出数据覆晶薄膜S-COF存储的初始数据A；
    当时序控制器TCON侦测到Lock信号为低电平时，时序控制器TCON将传输数据mini-LVDS的摆幅值调大一级，重新输出初始数据A；
    当时序控制器TCON侦测到Lock信号为高电平时，时序控制器TCON保持原数据传输参数工作，向数据覆晶薄膜S-COF传输数据。
  9. 一种降低电磁干扰的驱动装置，所述驱动装置包括1号芯片和2号芯片；
    1号芯片，用于向2号芯片传输数据，当确定2号芯片读取数据正确时，保持原数据传输参数工作，当确定2号芯片读取数据不正确，将传输数据的摆幅值调大一级；
    2号芯片，判断读取的传输数据是否正确，将判断结果返回至1号芯片，若正确，保持原数据传输参数工作。
  10. 根据权利要求9所述的一种降低电磁干扰的驱动装置，其中，
    所述传输数据的摆幅的初始值设为最小值。
  11. 根据权利要求9所述的一种降低电磁干扰的驱动装置，其中，
    所述判断读取的传输数据是否正确具体为：
    2号芯片接收的数据是否与内建存储的初始数据A相同，若相同，则判断为读取传输数据正确，若不同，则判断为读取传输数据不正确。
  12. 根据权利要求10所述的一种降低电磁干扰的驱动装置，其中，
    所述判断读取的传输数据是否正确具体为：
    2号芯片接收的数据是否与内建存储的初始数据A相同，若相同，则判断为读取传输数据正确，若不同，则判断为读取传输数据不正确。
  13. 根据权利要求11所述的一种降低电磁干扰的驱动装置，其中，
    所述1号芯片为时序控制器TCON，2号芯片为数据覆晶薄膜S-COF。
  14. 根据权利要求12所述的一种降低电磁干扰的驱动装置，其中，
    所述1号芯片为时序控制器TCON，2号芯片为数据覆晶薄膜S-COF。
  15. 根据权利要求13所述的一种降低电磁干扰的驱动装置，其中，
    所述数据覆晶薄膜S-COF，具体驱动过程为：
    每次开机时，Lock信号初始为逻辑电压低电平，接收时序控制器TCON传输的第一行数据，当接收到的数据与内建初始数据A不同时，Lock信号输出不改变，继续接收下一行数据；当接受到的数据与内建初始数据A相同时，Lock信号输出为逻辑电压高电平，保持原数据传输参数工作；
    所述时序控制器TCON，具体驱动过程为：
    时序控制器TCON先输出数据覆晶薄膜S-COF存储的初始数据A；
    当侦测到Lock信号为低电平时，将传输数据mini-LVDS的摆幅值调大一级，重新输出初始数据A；
    当侦测到Lock信号为高电平时，保持原数据传输参数工作，向数据覆晶薄膜S-COF传输数据。
  16. 根据权利要求14所述的一种降低电磁干扰的驱动装置，其中，
    所述数据覆晶薄膜S-COF，具体驱动过程为：
    每次开机时，Lock信号初始为逻辑电压低电平，接收时序控制器TCON传输的第一行数据，当接收到的数据与内建初始数据A不同时，Lock信号输出不改变，继续接收下一行数据；当接受到的数据与内建初始数据A相同时，Lock信号输出为逻辑电压高电平，保持原数据传输参数工作；
    所述时序控制器TCON，具体驱动过程为：
    时序控制器TCON先输出数据覆晶薄膜S-COF存储的初始数据A；
    当侦测到Lock信号为低电平时，将传输数据mini-LVDS的摆幅值调大一级，重新输出初始数据A；
    当侦测到Lock信号为高电平时，保持原数据传输参数工作，向数据覆晶薄膜S-COF传输数据。
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