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WO2012033332A3 - Source driver of liquid crystal display for reducing emi - Google Patents

Source driver of liquid crystal display for reducing emi Download PDF

Info

Publication number
WO2012033332A3
WO2012033332A3 PCT/KR2011/006600 KR2011006600W WO2012033332A3 WO 2012033332 A3 WO2012033332 A3 WO 2012033332A3 KR 2011006600 W KR2011006600 W KR 2011006600W WO 2012033332 A3 WO2012033332 A3 WO 2012033332A3
Authority
WO
WIPO (PCT)
Prior art keywords
data
source driver
emi
liquid crystal
crystal display
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2011/006600
Other languages
French (fr)
Other versions
WO2012033332A2 (en
Inventor
Soo Woo Kim
Ji Hun Kim
Young Keun Ko
An Young Kim
Joon Ho Na
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LX Semicon Co Ltd
Original Assignee
Silicon Works Co Ltd
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 Silicon Works Co Ltd filed Critical Silicon Works Co Ltd
Publication of WO2012033332A2 publication Critical patent/WO2012033332A2/en
Publication of WO2012033332A3 publication Critical patent/WO2012033332A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G09G3/3685—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
    • 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
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • 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
    • G09G2310/0294—Details of sampling or holding circuits arranged for use in a driver for data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
    • 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

Landscapes

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

Abstract

Provided is a source driver of a liquid crystal display for reducing electromagnetic interference (EMI), in which when a latch latches data of each channel and outputs the latched data, the data of each of the channels is sequentially distributed and outputted with a predetermined time difference or every bit, using an input driving signal, thereby reducing the EMI. In the source driver, after a first latch unit latches image data of each channel, a second latch unit sequentially latches the data of each of the channels with a time difference or every bit, using input driving signals delayed and outputted through a plurality of delays. Accordingly, when an output buffer of the source driver outputs a data signal, the data signal is sequentially delayed with a time difference and then outputted, thereby reducing the EMI.
PCT/KR2011/006600 2010-09-07 2011-09-07 Source driver of liquid crystal display for reducing emi Ceased WO2012033332A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20100087538A KR101205705B1 (en) 2010-09-07 2010-09-07 Source driver for reducing emi of a liquid crystal display
KR10-2010-0087538 2010-09-07

Publications (2)

Publication Number Publication Date
WO2012033332A2 WO2012033332A2 (en) 2012-03-15
WO2012033332A3 true WO2012033332A3 (en) 2012-05-31

Family

ID=45811070

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2011/006600 Ceased WO2012033332A2 (en) 2010-09-07 2011-09-07 Source driver of liquid crystal display for reducing emi

Country Status (3)

Country Link
KR (1) KR101205705B1 (en)
TW (1) TW201211999A (en)
WO (1) WO2012033332A2 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI475547B (en) * 2012-07-27 2015-03-01 Raydium Semiconductor Corp Driving circuit and operating method thereof
KR102218624B1 (en) * 2014-05-26 2021-02-23 삼성디스플레이 주식회사 Method of driving display panel and display apparatus for performing the same
KR102370280B1 (en) * 2014-10-24 2022-03-07 삼성디스플레이 주식회사 Adaptive black clipping circuit, display device including the same and adaptive black clipping method
KR102303757B1 (en) * 2014-12-15 2021-09-24 삼성디스플레이 주식회사 Data driver and display apparatus having them
KR102412675B1 (en) * 2015-06-03 2022-06-24 삼성디스플레이 주식회사 Display apparatus and method of driving the same
KR102050976B1 (en) 2019-02-25 2019-12-03 포스텍네트웍스(주) Controller and display panel for unnecessary electromagnetic wave reduction
KR102715306B1 (en) * 2019-04-19 2024-10-14 삼성디스플레이 주식회사 Source driver and display device having the same
KR102747274B1 (en) 2019-12-27 2024-12-26 엘지디스플레이 주식회사 Display apparatus
CN111292671B (en) * 2020-03-31 2023-09-29 京东方科技集团股份有限公司 Data driving circuit, driving method thereof and display device
CN112687223B (en) * 2020-12-28 2022-06-03 北京奕斯伟计算技术有限公司 Source electrode driving circuit, source electrode driving method and display device
CN112687224B (en) * 2020-12-28 2022-06-03 北京奕斯伟计算技术有限公司 Source electrode driving circuit, source electrode driving method and display device
KR102857438B1 (en) * 2021-07-02 2025-09-09 엘지디스플레이 주식회사 Display Device And Data Processing Method Of The Same
CN116798337B (en) * 2023-08-28 2023-11-24 深圳通锐微电子技术有限公司 Electromagnetic interference suppression circuit, source driver, display panel and electronic equipment
CN117711345A (en) * 2024-01-10 2024-03-15 京东方科技集团股份有限公司 Display panel, driving method, driving circuit and display device thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6697041B1 (en) * 1999-01-28 2004-02-24 Sharp Kabushiki Kaisha Display drive device and liquid crystal module incorporating the same
US20050285839A1 (en) * 2004-06-28 2005-12-29 Kim In H Driving circuit of liquid crystal display device and method for driving the same
US20100039413A1 (en) * 2008-08-13 2010-02-18 Akira Nakayama Display panel driving apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6697041B1 (en) * 1999-01-28 2004-02-24 Sharp Kabushiki Kaisha Display drive device and liquid crystal module incorporating the same
US20050285839A1 (en) * 2004-06-28 2005-12-29 Kim In H Driving circuit of liquid crystal display device and method for driving the same
US20100039413A1 (en) * 2008-08-13 2010-02-18 Akira Nakayama Display panel driving apparatus

Also Published As

Publication number Publication date
KR101205705B1 (en) 2012-11-28
TW201211999A (en) 2012-03-16
WO2012033332A2 (en) 2012-03-15
KR20120025657A (en) 2012-03-16

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