WO2020124870A1 - Système et procédé de transmission de signaux - Google Patents

Système et procédé de transmission de signaux Download PDF

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Publication number
WO2020124870A1
WO2020124870A1 PCT/CN2019/081603 CN2019081603W WO2020124870A1 WO 2020124870 A1 WO2020124870 A1 WO 2020124870A1 CN 2019081603 W CN2019081603 W CN 2019081603W WO 2020124870 A1 WO2020124870 A1 WO 2020124870A1
Authority
WO
WIPO (PCT)
Prior art keywords
clock training
training signal
signal
clock
signals
Prior art date
Application number
PCT/CN2019/081603
Other languages
English (en)
Chinese (zh)
Inventor
黎云涛
Original Assignee
深圳市华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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
Publication of WO2020124870A1 publication Critical patent/WO2020124870A1/fr

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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
    • G09G3/3696—Generation of voltages supplied to electrode 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
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]

Definitions

  • the present invention relates to the field of display technology, and in particular, to a signal transmission system and signal transmission method.
  • liquid crystal displays Liquid Crystal Display, LCD
  • organic light-emitting diode displays Organic Light Emitting Display (OLED) and other flat display devices
  • cathode ray tube Cathode Ray Tube, CRT
  • TVs, personal digital assistants, digital cameras, notebook computers, desktop computers and other consumer electronic products have become the mainstream in display devices.
  • liquid crystal displays which include a liquid crystal display panel and a backlight module.
  • the working principle of the liquid crystal display panel is based on the thin film transistor array substrate (Thin Film Transistor Array Substrate, TFT Array Substrate) and the color filter (Color Filter, CF) Liquid crystal molecules are poured between the substrates, and a driving voltage is applied to the two substrates to control the rotation direction of the liquid crystal molecules, so as to refract the light of the backlight module to generate a picture.
  • OLED screen Compared with LCD screen, OLED screen has thin, light, wide viewing angle, active light emission, continuously adjustable light color, low cost, fast response speed, low energy consumption, low driving voltage, wide operating temperature range, simple production process, light emission
  • PM passive matrix
  • AM active matrix
  • a conventional timing device (Tcon) and multiple source drivers are generally provided in the existing display device for driving the display device for display.
  • the timing controller will transmit multiple frequency drivers with the same frequency and high and low potential switches to multiple source drivers.
  • the clock training signal is the same, and the duty cycle of the clock training signal is 5:9. Because the clock training signal is single and repeated, the electromagnetic interference (EMI) radiation between the clock training signals is large. The electromagnetic interference radiation is especially obvious when the frequency of the clock training signal is between 100MHz-340MHz.
  • Another object of the present invention is to provide a signal transmission method that can reduce electromagnetic interference radiation between multiple clock training signals.
  • the frequency of multiple clock training signals is 100MHz-340MHz.
  • the signal transmission system includes a timing controller and a plurality of source drivers electrically connected to the timing controller, respectively;
  • the blanking phase includes a line blanking phase and a field blanking phase.
  • FIG. 1 is a schematic structural diagram of a signal transmission system of the present invention
  • the present invention provides a signal transmission system, including a timing controller 10 And the timing controller 10 Multiple source drivers electrically connected 20 .
  • the blanking phase includes a line blanking phase and a field blanking phase.
  • the frequencies of multiple clock training signals are all 100MHz-340MHz .
  • the seventh clock training signal CT7 And the eighth clock training signal CT8 The duration of one cycle is 9 Times the preset duration, the first clock training signal CT1 High level and keep it in every cycle 5 Times the preset duration, then goes low and remains 4 Times the preset duration, which is the first clock training signal CT1
  • the encoding in one cycle is 111110000 ,
  • the encoding in one cycle is 111111000 ,
  • the encoding in one cycle is 111111100 ,
  • the present invention also provides a signal transmission method, including the following steps:
  • the signal transmission system of the present invention includes a timing controller and a plurality of source drivers electrically connected to the timing controller respectively.
  • the timing controller transmits multiple clock trainings to the plurality of source drivers during the blanking phase. Signals, the frequencies of multiple clock training signals are the same, and the duty ratios of at least two clock training signals in the multiple clock training signals are different, thereby effectively reducing the electromagnetic interference radiation between the multiple clock training signals.
  • the signal transmission method of the present invention can reduce electromagnetic interference radiation between multiple clock training signals.

Landscapes

  • 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)
  • Liquid Crystal Display Device Control (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Dc Digital Transmission (AREA)

Abstract

L'invention concerne un système et un procédé de transmission de signaux. Le système de transmission de signaux comprend un dispositif de commande de synchronisation et de multiples pilotes de source connectés électriquement au dispositif de commande de synchronisation ; le dispositif de commande de synchronisation transmet séparément de multiples signaux d'apprentissage d'horloge aux multiples pilotes de source dans une phase de suppression ; les fréquences des multiples signaux d'apprentissage d'horloge sont identiques, et les rapports cycliques d'au moins deux signaux d'apprentissage d'horloge dans les multiples signaux d'apprentissage d'horloge sont différents, ce qui permet de réduire efficacement un rayonnement d'interférence électromagnétique entre les multiples signaux d'apprentissage d'horloge.
PCT/CN2019/081603 2018-12-20 2019-04-04 Système et procédé de transmission de signaux WO2020124870A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811565602.6 2018-12-20
CN201811565602.6A CN109410881B (zh) 2018-12-20 2018-12-20 信号传输系统及信号传输方法

Publications (1)

Publication Number Publication Date
WO2020124870A1 true WO2020124870A1 (fr) 2020-06-25

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Application Number Title Priority Date Filing Date
PCT/CN2019/081603 WO2020124870A1 (fr) 2018-12-20 2019-04-04 Système et procédé de transmission de signaux

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CN (1) CN109410881B (fr)
WO (1) WO2020124870A1 (fr)

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* Cited by examiner, † Cited by third party
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CN109410881B (zh) * 2018-12-20 2020-06-02 深圳市华星光电技术有限公司 信号传输系统及信号传输方法
CN110047419A (zh) * 2019-04-30 2019-07-23 深圳市华星光电半导体显示技术有限公司 改善goa电路电磁辐射的驱动装置及其方法
CN110277047B (zh) * 2019-05-31 2022-11-22 北京集创北方科技股份有限公司 降低显示器驱动过程中的电磁干扰的方法及装置
CN111326098B (zh) * 2020-04-08 2022-10-04 Tcl华星光电技术有限公司 源极驱动控制方法、装置及显示终端

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CN101847387A (zh) * 2009-03-27 2010-09-29 株式会社半导体能源研究所 液晶显示装置
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CN109410881B (zh) 2020-06-02

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