WO2010002106A2 - 액정표시장치의 구동회로 및 그 구동방법 - Google Patents
액정표시장치의 구동회로 및 그 구동방법 Download PDFInfo
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- WO2010002106A2 WO2010002106A2 PCT/KR2009/002694 KR2009002694W WO2010002106A2 WO 2010002106 A2 WO2010002106 A2 WO 2010002106A2 KR 2009002694 W KR2009002694 W KR 2009002694W WO 2010002106 A2 WO2010002106 A2 WO 2010002106A2
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- multiplexer
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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
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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
- G09G3/3614—Control of polarity reversal in general
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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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
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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
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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
- 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
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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
- G09G2310/00—Command of the display device
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
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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
- 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 invention relates to a driving circuit and a driving method of a liquid crystal display device. More particularly, the data is applied by applying a polarity control signal POL in advance in a data register block of a controller before data is stored in a first latch of the data driver.
- the present invention relates to a driving circuit and a driving method of a liquid crystal display device in which a chip size can be reduced by placing a multiplexer, which is required for a plurality of channels, in a single control unit after exchange.
- a liquid crystal display is one of flat panel display devices that display characters, symbols, or graphics by adjusting the light transmittance of liquid crystal cells by using optical properties of liquid crystals whose molecular arrangements are changed by an electric field.
- a driving circuit of a conventional liquid crystal display device which outputs video data by supplying scan pulse and data to a data line and a gate line intersection of a liquid crystal panel in which a thin film transistor (TFT), which is a switching element for driving a liquid crystal cell, is provided.
- TFT thin film transistor
- receives video data from a video card or the like separates the even data and odd data, and then transmits the control unit 20 to transmit the latches of the respective channels, and receives the separated data.
- a data driver 20 latches the enable signal and exchanges data between adjacent channels according to the polarity control signal POL and outputs the data to the data line.
- the controller 20 may receive a low voltage input signal (mini-LVDS input data), which is video data to be displayed, from a video card or the like, and temporarily store the video data. And a data register which is divided into odd data and supplied to the first latch of the data driver.
- mini-LVDS input data which is video data to be displayed
- the data driver 30 provided for each channel may include a first latch (1st) for sequentially sampling the video data inputted from the data register by a first enable signal (1st Latch enable) generated by the shift register. Latch), a second latch (2nd Latch) for latching the data input from the first latch and output in response to a second enable signal (2nd Latch enable), and the data output from the second latch polarity control Multiplexer (MUX) which selects one of positive gamma voltage and negative gamma voltage corresponding to each gray value of video data according to signal POL, exchanges data between adjacent channels, and supplies them to each data line It consists of.
- MUX polarity control Multiplexer
- a multiplexer for exchanging data between adjacent channels is required according to a polarity control signal POL.
- a driving circuit of a conventional liquid crystal display device is output. Since the output polarity of the amplifier provided in the gamma reference voltage generator is received by receiving the current horizontal synchronization signal of the video data, the multiplexer is connected to the output terminal of the second latch provided in each channel where the video data is output to the data line. It had to be constructed.
- the multiplexer MUX must be provided for each of a plurality of channels, so that the size of the region where each channel is formed has to be increased, thereby increasing the size of the semiconductor chip. There was nothing but a problem.
- the present invention is a system having an integrated multiplexer in the control unit, and recognizes the polarity control signal in the current load signal and exchanges the data accordingly, and outputs the data to the data line in the next load signal
- the liquid crystal display can reduce the size of the channel region and the overall size of the semiconductor chip by removing the multiplexer required in each channel portion.
- the present invention provides a driving circuit and a driving method of an apparatus.
- the driving circuit of the liquid crystal display device for achieving the above technical problem is a driving circuit of the liquid crystal display device for supplying the data and the scan pulse to the intersection of the data line and the gate line of the liquid crystal panel to display the video data is excellent
- a control unit having an integrated multiplexer which separates data into odd data and exchanges data between adjacent channels in advance according to a polarity control signal and transmits the data to a latch of each channel;
- a data driver which is provided for each channel for transmitting video data to the data line, receives data from the control unit, latches the data by an enable signal, and outputs the data data to the data line.
- control unit the control unit for receiving and temporarily storing the video data;
- a data register for separating the received video data into even data and odd data;
- a multiplexer which selects the polarity of the output according to the polarity control signal POL and exchanges the data in advance, and then transmits the data to the latch of the data driver.
- the data driver is further configured to transmit the video data exchanged by the multiplexer.
- a first latch for sequentially sampling; And a second latch for latching data input from the first latch and outputting the data to each data line.
- the control unit may further include: a load signal for recognizing a polarity control signal POL in the multiplexer and exchanging data, and a load signal for supplying even data output and odd data output to a data line; It is characterized in that the data exchange according to the polarity control signal (POL) is made before the first latch storage of each channel portion.
- POL polarity control signal
- the control unit may recognize the polarity control signal POL from the current load signal and store data in the first latch after exchanging data according to the polarity control signal POL in the multiplexer. And the polarity of the output is determined by synchronizing the control signal POL with the next load signal after one horizontal synchronous signal (1H time).
- the driving method of the liquid crystal display comprises the steps of: receiving video data from the buffer of the control unit and temporarily storing the video data; Separating the video data into even data and odd data in a data register; Recognizing a polarity control signal (POL) using a current load signal and exchanging data between adjacent channels in advance in a multiplexer integrated in the control unit; Storing storm data and odd data exchanged in the multiplexer in first and second latches provided in each channel unit; And supplying even data output and odd data output to the data line according to the polarity of the output determined by the polarity control signal POL in synchronization with the next load signal.
- POL polarity control signal
- the present invention has the advantage of significantly reducing the overall size of the semiconductor chip by installing an integrated multiplexer in a control unit provided with only one semiconductor chip and removing the multiplexer required for each of the plurality of channel units.
- FIG. 1 is a configuration diagram of a driving circuit of a conventional liquid crystal display device.
- FIG. 2 is a configuration diagram of a driving circuit of the liquid crystal display device according to the present invention.
- FIG. 3 is a timing diagram of a liquid crystal display driving circuit conventionally provided with a multiplexer for each channel portion.
- FIG. 4 is a timing diagram of a liquid crystal display driving circuit including an integrated multiplexer in a control unit according to the present invention.
- FIG. 5 is a configuration diagram of a method of driving a liquid crystal display device according to the present invention.
- the driving circuit 100 of the liquid crystal display receives the video data and separates the even data and the odd data into adjacent channels according to the polarity control signal POL. And a control unit 200 for exchanging data and transmitting the data to a latch of each channel, and a data driver 300 for receiving data from the control unit, latching the data by an enable signal, and outputting the data to the data line.
- the control unit 200 receives a low voltage input signal (mini-LVDS input data) that is video data and temporarily stores the buffer (Rx buffer) 210, and stores the received video data as even data (dtreg even) and odd data.
- a data register 220 to be separated by a dtreg odd and a positive gamma voltage and a negative polarity corresponding to each gray value of the video data according to the polarity control signal POL.
- a multiplexer (MUX) 230 for selecting any one of the gamma voltages and exchanging data between adjacent channels and transmitting the data to a latch of each channel is provided.
- the multiplexer 230 may be separately installed in the control unit 200, as well as installed in the data register 220 together with video data separated into even and odd data according to the polarity control signal POL. It may be configured to exchange immediately.
- control unit 200 drives the data driving control signal and the gate driving using horizontal and vertical synchronization signals H and V input together with the video data to control the driving circuit 100 of the liquid crystal display device.
- a control signal is generated, and the data driving control signal is transmitted to the data driver 300 along with a first latch enable signal, a second latch enable signal, and a second latch enable signal, and the polarity control signal.
- the POL is configured to be delivered to the multiplexer 230 installed inside the control unit 200.
- the polarity control signal POL is a signal used to select the polarity of the channel output, and outputs the polarity control signal POL before 1 horizontal synchronous signal 1H time to the amplifier output of the current gamma reference voltage generator. It is configured to apply to. Therefore, before the video data is stored in the first latch 310 provided in each channel, the polarity control signal POL is applied in advance, the data is exchanged, and the data is stored in the first latch 310, and at this time, the polarity control signal The polarity of the output is determined by synchronizing (POL) with the load signal after one horizontal synchronizing signal (1H time).
- the data is immediately exchanged in the multiplexer 230 immediately after the video data is separated from the data register provided in the control unit before being stored in the first latch 310.
- the multiplexer required for each channel can be eliminated.
- the data driver 300 is provided for each channel that transmits video data to a data line, and the video data exchanged by the multiplexer 230 is controlled by a first enable signal generated by a shift register.
- a first latch 310 for sequentially sampling and a second latch for latching data input from the first latch and outputting the data to each data line in response to a second enable signal 2nd latch enable. 2nd Latch) 320 is provided.
- the polarity control signal POL before the 1 horizontal synchronous signal is applied to the output of the amplifier AMP of the current gamma reference voltage generator, so that the control unit 200 exchanges data between adjacent channels according to the polarity control signal POL.
- the multiplexer (MUX) required in each channel can be eliminated, thereby reducing the size of the channel region in which each channel is formed, thereby significantly reducing the overall semiconductor chip size of the liquid crystal display driver circuit. You can do it.
- FIG. 3 is a timing diagram of a conventional liquid crystal display driving circuit including a multiplexer for each channel portion
- FIG. 4 is a timing diagram of a liquid crystal display driving circuit including a multiplexer integrated into a control unit according to the present invention.
- the polarity control signal POL is recognized from the current load signal LOAD that determines whether the data driver outputs data, and the current load signal is recognized.
- the polarity control signal (POL) based on the common voltage supplied between the drain terminal of the thin film transistor and the storage capacitor in synchronization with the (LOAD), even data output (ODD output) and odd data output (EVEN output) Is supplied to the data line.
- video data divided into even data and odd data is transmitted to each channel in the data register 220 of the control unit, and is currently loaded by the multiplexer (MUX) provided in each channel.
- the polarity control signal POL is recognized by the signal LOAD to exchange data, to select an output polarity, and to exchange data between adjacent channels.
- the polarity in the current load signal LOAD that determines whether to output data from the data driver.
- the control signal is recognized, and the data is exchanged according to the polarity control signal in the multiplexer (MUX) 230 provided in the data register 220 of the control unit and then stored in the first latch 310 of each channel unit.
- MUX multiplexer
- even and odd data stored by exchanging data by the current polarity control signal POL determine the polarity of the output in synchronization with the next load signal LOAD. Therefore, in accordance with the polarity determined by the current polarity control signal POL based on the common voltage in synchronization with the next load signal, the even data output (ODD output) and the odd data output (EVEN output) are supplied to the data line.
- the time of transition of the load signals that is, the rising edge and the falling edge may be selectively used.
- a method of driving a liquid crystal display device in which a multiplexer is removed from each channel unit and an integrated multiplexer is provided, is configured to receive and temporarily store mini-LVDS input data, which is video data, in a buffer.
- mini-LVDS input data which is video data
- step S10 separating the received video data into even data and odd data in a data register in step S20, and recognizing the polarity control signal POL in the current load signal LOAD.
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Abstract
Description
Claims (5)
- 액정패널의 데이터 라인과 게이트 라인의 교차부에 데이터와 스캔 펄스를 공급하여 디스플레이하는 액정표시장치의 구동회로에 있어서,비디오 데이터를 입력받아 우수 데이터와 기수 데이터로 분리하고, 극성제어신호에 따라 인접 채널간 데이터를 미리 교환하여 각 채널의 래치로 전송하는 통합적인 멀티플렉서가 구비된 컨트롤부; 및상기 데이터 라인으로 비디오 데이터를 전송하는 각 채널마다 구비되며, 상기 컨트롤부로부터 데이터를 수신하고 인에이블 신호에 의해 래치하여 상기 데이터 라인으로 출력하는 데이터 구동부를 포함하는 것을 특징으로 하는 액정표시장치의 구동회로.
- 제1항에 있어서,상기 컨트롤부는,상기 비디오 데이터를 수신하여 일시 저장하는 버퍼;수신한 비디오 데이터를 우수 데이터와 기수 데이터로 분리하는 데이터 레지스터; 및분리된 데이터를 극성제어신호(POL)에 따라 출력의 극성을 선택하여 데이터를 미리 교환한 후 상기 데이터 구동부의 래치로 전송하는 멀티플렉서를 포함하고,상기 데이터 구동부는,상기 멀티플렉서에서 교환된 비디오 데이터를 순차적으로 샘플링하는 제1래치; 및상기 제1래치로부터 입력되는 데이터를 래치하고 각 데이터 라인으로 출력하는 제2래치가 구비된 것을 특징으로 하는 액정표시장치의 구동회로.
- 제2항에 있어서,상기 컨트롤부는,상기 멀티플렉서에서 극성제어신호(POL)를 인식하고 데이터를 교환하는 로드신호와, 우수 데이터 출력과 기수 데이터 출력을 데이터 라인으로 공급하는 로드신호를 분리하여, 상기 극성제어신호(POL)에 따른 데이터 교환이 각 채널부의 제1래치 저장 전에 이루어지도록 구성된 것을 특징으로 하는 액정표시장치의 구동회로.
- 제3항에 있어서,상기 컨트롤부는,현재 로드신호를 이용하여 극성제어신호(POL)를 인식하고 상기 멀티플렉서에서 상기 극성제어신호(POL)에 따라 데이터를 교환한 후 상기 제1래치에 저장하며,상기 극성제어신호(POL)를 1 수평동기신호(1H time) 후의 다음 로드신호에 동기시켜 출력의 극성을 결정하도록 구성되는 것을 특징으로 하는 액정표시장치의 구동회로.
- 액정표시장치의 구동방법에 있어서,컨트롤부의 버퍼에서 비디오 데이터를 수신하여 일시 저장하는 단계;데이터 레지스터에서 상기 비디오 데이터를 우수 데이터와 기수 데이터로 분리하는 단계;현재 로드신호에서 극성제어신호(POL)를 인식하고, 상기 컨트롤부에 통합적으로 구비된 멀티플렉서에서 인접 채널간 데이터를 미리 교환하는 단계;상기 멀티플렉서에서 교환된 우수 데이터와 기수 데이터를 각 채널부에 구비된 제1 및 제2래치에 저장하는 단계; 및다음 로드신호에서 동기시켜 상기 극성제어신호(POL)에 의해 결정된 출력의 극성에 따라 우수 데이터 출력과 기수 데이터 출력을 데이터 라인으로 공급하는 단계를 포함하는 것을 특징으로 하는 액정표시장치의 구동방법.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2011516110A JP5706321B2 (ja) | 2008-06-30 | 2009-05-22 | 液晶表示装置の駆動回路及びその駆動方法 |
CN2009801233947A CN102067203B (zh) | 2008-06-30 | 2009-05-22 | 液晶显示器驱动电路及其驱动方法 |
US13/000,882 US9082355B2 (en) | 2008-06-30 | 2009-05-22 | Circuit for driving LCD device and driving method thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2008-0062264 | 2008-06-30 | ||
KR1020080062264A KR100952390B1 (ko) | 2008-06-30 | 2008-06-30 | 액정표시장치의 구동회로 및 그 구동방법 |
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WO2010002106A2 true WO2010002106A2 (ko) | 2010-01-07 |
WO2010002106A3 WO2010002106A3 (ko) | 2010-03-11 |
WO2010002106A4 WO2010002106A4 (ko) | 2010-05-14 |
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PCT/KR2009/002694 WO2010002106A2 (ko) | 2008-06-30 | 2009-05-22 | 액정표시장치의 구동회로 및 그 구동방법 |
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US (1) | US9082355B2 (ko) |
JP (1) | JP5706321B2 (ko) |
KR (1) | KR100952390B1 (ko) |
CN (1) | CN102067203B (ko) |
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CN102136264A (zh) * | 2010-10-07 | 2011-07-27 | 友达光电股份有限公司 | 驱动电路与显示器的驱动方法 |
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TW201516997A (zh) | 2013-10-29 | 2015-05-01 | Novatek Microelectronics Corp | 源極驅動器及其驅動方法 |
KR102423674B1 (ko) * | 2017-09-15 | 2022-07-22 | 주식회사 디비하이텍 | 소스 드라이버, 및 이를 포함하는 디스플레이 장치 |
CN115171586A (zh) * | 2022-07-26 | 2022-10-11 | 武汉华星光电半导体显示技术有限公司 | 数据驱动器及显示装置 |
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Also Published As
Publication number | Publication date |
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WO2010002106A4 (ko) | 2010-05-14 |
JP5706321B2 (ja) | 2015-04-22 |
KR20100002394A (ko) | 2010-01-07 |
CN102067203A (zh) | 2011-05-18 |
TW201001393A (en) | 2010-01-01 |
US20110109816A1 (en) | 2011-05-12 |
JP2011525639A (ja) | 2011-09-22 |
US9082355B2 (en) | 2015-07-14 |
KR100952390B1 (ko) | 2010-04-14 |
CN102067203B (zh) | 2013-08-28 |
WO2010002106A3 (ko) | 2010-03-11 |
TWI420485B (zh) | 2013-12-21 |
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