KR100300061B1 - TFT LCD's Column Drive Amplifier - Google Patents
TFT LCD's Column Drive Amplifier Download PDFInfo
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- KR100300061B1 KR100300061B1 KR1019980060252A KR19980060252A KR100300061B1 KR 100300061 B1 KR100300061 B1 KR 100300061B1 KR 1019980060252 A KR1019980060252 A KR 1019980060252A KR 19980060252 A KR19980060252 A KR 19980060252A KR 100300061 B1 KR100300061 B1 KR 100300061B1
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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
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
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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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- Crystallography & Structural Chemistry (AREA)
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
본 발명은 티에프티 엘씨디의 칼럼구동앰프에 관한 것으로, 종래에는 네가티브구동회로와 포지티브구동회로를 한 개씩 보유하고 있어서, 입력되는 신호에 따라 항상 일정한 전류로 픽셀을 충방전하게 되는데, 이경우에 칼럼 구동앰프에서 물리적으로 멀리 떨어질수록 신호지연이 커지게 되어 화질이 저하되고, 또한 이로인한 화질의 저하를 보상하기 위해서는 대용량의 출력구동회로를 사용하게 되어 비용이 상승되는 문제점이 있었다. 따라서, 본 발명은 전원전압단자 사이에서 칼럼구동전압을 입력받아 증폭하는 칼럼드라이버앰프와, 상기 칼럼드라이버앰프의 출력신호에 의해 구동되는 네가티브구동회로와 포지티브구동회로로 이루어져 출력구동신호를 출력하는 출력구동부와, 상기 출력구동부의 출력구동신호에 의해 충방전되어 칼럼구동전압을 출력하는 칼럼구동부로 이루어진 티에프티 엘씨디의 칼럼구동앰프에 있어서, 칼럼 구동에서 발생되는 픽셀간의 구동지연시간 차이를 보조하는 출력구동신호를 조작신호에 의해 출력하는 보조구동부와 스위칭제어신호를 입력받아 그에따른 조작신호를 상기 보조구동부에 출력하는 조작부를 더 포함하여 구성함으로써 구동하고자 하는 픽셀에 따라 최적의 구동회로를 내부적으로 구성하여 픽셀간의 신호지연 시간차이를 최소화하여 화질을 향상시킬 수 있는 효과가 있다.The present invention relates to a TFT drive column drive amplifier, and conventionally has one negative drive circuit and one positive drive circuit, so that the pixel is always charged and discharged with a constant current according to the input signal, in this case column drive As the physical distance from the amplifier increases, the signal delay increases, and the image quality is degraded. To compensate for the degradation of the image quality, a large output drive circuit is used to increase the cost. Therefore, the present invention comprises a column driver amplifier for receiving and amplifying the column drive voltage between the power supply voltage terminals, a negative drive circuit driven by the output signal of the column driver amplifier and a positive drive circuit to output an output drive signal In the column drive amplifier of TFT LCD comprising a driver and a column driver for charging and discharging by an output drive signal of the output driver and outputting a column drive voltage, an output for assisting a difference in driving delay time between pixels generated in the column drive. It further comprises an auxiliary driver for outputting a drive signal by an operation signal and an operation unit for receiving a switching control signal and outputting a corresponding operation signal to the auxiliary driver, thereby internally configuring an optimum drive circuit according to the pixel to be driven. The signal delay time difference between pixels The effect to improve quality.
Description
본 발명은 티에프티 엘씨디의 칼럼구동앰프에 관한 것으로, 특히 대화면 티에프티 엘씨디의 칼럼 구동에서 발생되는 픽셀간의 구동지연시간 차이로 인한 화질의 저하를 방지할 수 있도록 한 티에프티 엘씨디의 칼럼구동앰프에 관한 것이다.The present invention relates to a column drive amplifier of a TFT LCD, particularly to a column drive amplifier of a TFT LCD to prevent the degradation of the image quality caused by the difference in driving delay time between pixels generated in the column drive of the large screen TFT LCD It is about.
도1은 종래 티에프티(TFT) 엘씨디(LCD)의 칼럼구동앰프에 대한 구성을 보인 회로도로서, 이에 도시된 바와같이 전원전압단자(SP1,SP2) 사이에서 칼럼구동전압(Vin)을 입력받아 증폭하는 칼럼드라이버앰프(APi)와; 상기 칼럼드라이버앰프(APi)의 출력신호에 의해 구동되는 네가티브구동회로(ND)와 포지티브구동회로(PD)로 이루어져 출력구동신호를 출력하는 출력구동부(10)와; 상기 출력구동부(10)의 출력구동신호에 의해 충방전되어 칼럼구동전압(Vcl)을 출력하는 칼럼구동부(20)로 구성되고, 상기 칼럼구동부(20)는 칼럼라인의 전체저항(Rcl)과 칼럼라인의 전체커패시턴스를 가지는 일측이 접지된 커패시터(Ccl)를 접속하여 구성 이와같이 구성된 종래 장치의 동작을 설명한다.FIG. 1 is a circuit diagram showing a configuration of a column drive amplifier of a conventional TFT LCD. As shown therein, a column drive voltage Vin is input between power supply voltage terminals SP1 and SP2. A column driver amplifier (APi); An output driver 10 which comprises an negative driver circuit ND and a positive driver circuit PD driven by the output signal of the column driver amplifier APi and outputs an output driver signal; The column driver 20 is charged and discharged by the output driver signal of the output driver 10 to output the column driver voltage Vcl. The column driver 20 includes the total resistance Rcl of the column line and the column. One side having the total capacitance of the line is connected to a grounded capacitor Ccl. The operation of the conventional device configured as described above will be described.
먼저, 칼럼드라이버앰프(APi)는 임의의 칼럼라인의 동작시간동안 직류 화상신호인 칼럼구동전압(Vin)을 비반전단자(+)에 입력받아 이를 증폭하여 출력구동부(10)에 인가한다.First, the column driver amplifier APi receives a column driving voltage Vin, which is a DC image signal, during operation time of an arbitrary column line, and amplifies it to the non-inverting terminal + to apply it to the output driver 10.
그러면, 상기 출력구동부(10)는 상기 칼럼드라이버앰프(APi)의 출력신호에 의해 포지티브구동회로(PD)와 네가티브구동회로(ND)를 구동시켜 그에 따른 출력구동신호를 출력한다.Then, the output driver 10 drives the positive driver circuit PD and the negative driver circuit ND by the output signal of the column driver amplifier APi and outputs the output driver signal accordingly.
이후, 칼럼구동부(20)는 상기 출력구동부(10)의 출력구동신호에 의해 픽셀의 커패시터(Ccl)를 충방전하여 원하는 화상을 만든다.Thereafter, the column driver 20 charges and discharges the capacitor Ccl of the pixel by the output driver signal of the output driver 10 to produce a desired image.
이때, 피이드백 패스(FB)는 칼럼의 전압을 감지하여 이를 상기 칼럼드라이버앰프(APi)의 반전단자(-)에 피이드백함으로써 입력된 신호와 동일한 신호가 해당되는 칼럼에 전달되도록 한다.In this case, the feedback pass FB senses the voltage of the column and feeds it back to the inverting terminal (−) of the column driver amplifier APi so that the same signal as the input signal is transferred to the corresponding column.
즉, 티에프티 엘씨디 판넬에서는 1라인 싸이클동안 1개의 라인즉, 1개의 로우의 모든 칼럼에 해당되는 픽셀을 칼럼수만큼의 칼럼드라이버앰프(APi)에 의해 구동되어진다(1-로우의 픽셀수= 칼럼수, 즉 브이지에이인 경우 로우는 480라인, 칼럼은 640×3(R.G.B)개의 칼럼이 있고, 각 칼럼에는 픽셀이 존재).That is, in the TFT LCD panel, pixels corresponding to all columns of one line, that is, one row, are driven by the number of columns of the column driver amplifiers APi during one line cycle. The number of columns, i.e. the VG, has 480 rows, the columns have 640 x 3 (RGB) columns, and each column has pixels).
상기 칼럼드라이버앰프(APi)가 픽셀을 구동하기 위해서는 칼럼라인의 기생저항과 커패시터 또한 픽셀과 마찬가지로 칼럼드라이버앰프(APi)의 부하로 작용하게 된다.In order for the column driver amplifier APi to drive the pixel, the parasitic resistance and the capacitor of the column line act as a load of the column driver amplifier APi like the pixel.
이때, 픽셀의 임피던스는 모든 로우에 대해 동일하지만 픽셀까지 도달하는 칼럼라인의 길이는 로우가 변할때마다 변경되어지고, 이로 인해 픽셀까지의 칼럼라인 임피던스는 순차적으로 증가하게 된다.In this case, the impedance of the pixel is the same for all rows, but the length of the column line reaching the pixel is changed each time the row is changed, thereby increasing the column line impedance to the pixel sequentially.
다시말하면, 칼럼드라이버앰프(APi)의 부하가 변화하게 되어 픽셀까지의 신호지연시간이 로우에 따라 달라진다.In other words, the load of the column driver amplifier Api is changed so that the signal delay time to the pixel varies with the row.
그러나, 상기와 같이 동작하는 종래 장치는 네가티브구동회로와 포지티브구동회로를 한 개씩 보유하고 있어서, 입력되는 신호에 따라 항상 일정한 전류로 픽셀을 충방전하게 되는데, 이경우에 칼럼 구동앰프에서 물리적으로 멀리 떨어질수록 신호지연이 커지게 되어 화질이 저하되고, 또한 이로인한 화질의 저하를 보상하기 위해서는 대용량의 출력구동회로를 사용하게 되어 비용이 상승되는 문제점이 있었다.However, the conventional apparatus operating as described above has one negative driving circuit and one positive driving circuit, so that the pixel is always charged and discharged with a constant current according to the input signal, in which case it is physically far from the column driving amplifier. As the signal delay increases, the image quality is lowered, and in order to compensate for the degradation of the image quality, a large output driver circuit is used to increase the cost.
따라서, 상기와 같은 문제점을 감안하여 창안한 본 발명은 대화면 티에프티 엘씨디의 칼럼 구동에서 발생되는 픽셀간의 구동지연시간 차이로 인한 화질의 저하를 방지할 수 있도록 한 티에프티 엘씨디의 칼럼구동앰프를 제공함에 그 목적이 있다.Accordingly, the present invention devised in view of the above-described problems provides a column drive amplifier of a TFT LCD to prevent deterioration in image quality due to a difference in driving delay time between pixels generated in the column driving of a large screen TFT LCD. Has its purpose.
도1은 종래 티에프티 엘씨디의 칼럼구동앰프에 대한 구성을 보인 회로도.1 is a circuit diagram showing a configuration of a column drive amplifier of the conventional TFT LCD.
도2는 본 발명 티에프티 엘씨디의 칼럼구동앰프에 대한 구성을 보인 회로도.Figure 2 is a circuit diagram showing the configuration of the column drive amplifier of the present invention TFT LCD.
*****도면의 주요부분에 대한 부호의 설명********** Description of the symbols for the main parts of the drawings *****
10:출력구동부 20:칼럼구동부10: output drive unit 20: column drive unit
100:보조구동부 200:조작부100: auxiliary drive part 200: operation part
APi:칼럼드라이버앰프APi: Column Driver Amplifier
상기와 같은 목적을 달성하기 위한 본 발명은 전원전압단자 사이에서 칼럼구동전압을 입력받아 증폭하는 칼럼드라이버앰프와, 상기 칼럼드라이버앰프의 출력신호에 의해 구동되는 네가티브구동회로와 포지티브구동회로로 이루어져 출력구동신호를 출력하는 출력구동부와, 상기 출력구동부의 출력구동신호에 의해 충방전되어 칼럼구동전압을 출력하는 칼럼구동부로 이루어진 티에프티 엘씨디의 칼럼구동앰프에 있어서, 칼럼 구동에서 발생되는 픽셀간의 구동지연시간 차이를 보조하는 출력구동신호를 조작신호에 의해 출력하는 보조구동부와 스위칭제어신호를 입력받아 그에따른 조작신호를 상기 보조구동부에 출력하는 조작부를 더 포함하여 구성한 것을 특징으로 한다.The present invention for achieving the above object consists of a column driver amplifier for receiving and amplifying the column drive voltage between the power supply voltage terminal, the negative driver circuit and a positive drive circuit driven by the output signal of the column driver amplifier output In the column drive amplifier of TFT LCD comprising an output driver for outputting a drive signal and a column driver for charging and discharging by an output drive signal of the output driver and outputting a column drive voltage, a drive delay between pixels generated in the column drive. And an auxiliary driving unit for outputting an output driving signal for assisting a time difference by an operation signal, and an operation unit for receiving a switching control signal and outputting a corresponding operation signal to the auxiliary driving unit.
이하, 본 발명에 의한 티에프티 엘씨디의 칼럼구동앰프에 대한 작용 및 효과를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the operation and effects of the TFT drive CD drive according to the present invention will be described in detail.
도2는 본 발명 티에프티 엘씨디의 칼럼구동앰프에 대한 구성을 보인 회로도로서, 이에 도시한 바와같이 전원전압단자(SP1,SP2) 사이에서 칼럼구동전압(Vin)을 입력받아 증폭하는 칼럼드라이버앰프(APi)와, 상기 칼럼드라이버앰프(APi)의 출력신호에 의해 구동되는 네가티브구동회로(ND)와 포지티브구동회로(PD)로 이루어져 출력구동신호를 출력하는 출력구동부(10)와, 상기 출력구동부(10)의 출력구동신호에 의해 충방전되어 칼럼구동전압(VCL)을 출력하는 칼럼구동부(20)와, 칼럼 구동시에 발생되는 픽셀간의 구동지연시간 차이를 보조하는 출력구동신호를 조작신호에 의해 출력하는 보조구동부(100)와 스위칭제어신호를 입력받아 그에따른 제1,제2 조작신호를 상기 보조구동부(100)에 출력하는 조작부(200)로 구성한다.FIG. 2 is a circuit diagram showing a configuration of a column drive amplifier of the TFT LCD of the present invention. As shown therein, a column driver amplifier for receiving and amplifying the column driving voltage Vin between the power supply voltage terminals SP1 and SP2 is shown in FIG. APi, a negative driver circuit ND and a positive driver circuit PD driven by the output signal of the column driver amplifier APi, and an output driver 10 for outputting an output driver signal, and the output driver ( Outputs a column driver 20 for charging and discharging by the output drive signal of 10) and outputting a column drive voltage VCL, and an output drive signal for assisting the difference in driving delay time between pixels generated at the time of column driving by an operation signal. The control unit 200 receives the auxiliary driving unit 100 and the switching control signal and outputs the first and second operation signals to the auxiliary driving unit 100.
상기 보조구동부(200)는 전원전압단자(SP1,SP2) 사이에서 칼럼드라이버앰프(APi)의 출력신호에 의해 포지티브신호를 발생하고, 병렬 연결된 다수의 포지티브발생회로(PD1~PDn)와, 전압전압단자(SP1,SP2) 사이에서 상기 칼럼드라이버앰프의 출력신호에 의해 네가티브신호를 발생하고, 병렬 연결된 다수의 네가티브발생회로(ND1~NDn)와, 상기 다수의 네가티브 발생회로(ND1~NDn)와 다수의 포지티브발생회로(PD1~PDn)는 각기 직렬 접속되고, 그 접속점에서 각기 네가티브신호 또는 포지티브신호를 조작신호에 의해 스위칭하는 다수의 스위치(SWP1~SWPn,SWN1~SWNn)로 구성하며, 이와 같이 구성한 본 발명의 동작을 설명한다.The auxiliary driver 200 generates a positive signal by the output signal of the column driver amplifier APi between the power supply voltage terminals SP1 and SP2, and the plurality of positive generation circuits PD1 to PDn connected in parallel with each other, and voltage voltage. The negative signal is generated by the output signal of the column driver amplifier between the terminals SP1 and SP2, and the plurality of negative generation circuits ND1 to NDn connected in parallel, and the plurality of negative generation circuits ND1 to NDn and a plurality of them are connected in parallel. The positive generation circuits PD1 to PDn are each connected in series, and each of the positive generation circuits PD1 to PDn is composed of a plurality of switches (SWP1 to SWPn, SWN1 to SWNn), each of which switches a negative signal or a positive signal by an operation signal. The operation of the present invention will be described.
먼저, 칼럼드라이버앰프(APi)가 티에프티 엘씨디의 첫 번째 로우를 구동하기 전에, 조작부(200)는 스위치제어신호를 입력받아 보조구동부(100)의 모든 스위치(SWP1 ~SWPn,SWN1~SWNn)를 오프시킨다.First, before the column driver amplifier Api drives the first row of the TFT LCD, the operation unit 200 receives a switch control signal and switches all the switches SWP1 to SWPn and SWN1 to SWNn of the auxiliary driver 100. Turn it off.
이후, 첫 번째 로우를 구동할 때 모든 보조구동부(100)의 연결 스위치(SWP1 ~SWPn,SWN1~SWNn)가 오프된 상태에서 출력구동부(10)의 포지티브발생회로나 네가티브발생회로를 상기 칼럼드라이버앰프의 출력신호에 의해 동작시켜 해당되는 칼럼구동부(20)를 구동한다.Subsequently, when the first row is driven, the positive driver circuit or the negative generator circuit of the output driver 10 is turned off while the connection switches SWP1 to SWPn and SWN1 to SWNn of all the auxiliary drivers 100 are turned off. It operates by the output signal of the corresponding column drive unit 20 is driven.
이후, 상기 첫 번째 로우를 구동을 완료한 후에 두 번째 로우를 구동하기 위해서는 조작부(200)에 의해 스위치(SWP1,SWN1)를 온시키고 그 밖의 다른 스위치(SWP2 ~SWPn,SWN2~SWNn)는 턴오프시키고, 그러면 구동패스를 출력구동부(10)의 포지티브발생회로(PD) 및 네가티브발생회로(ND)와 보조구동부(100)의 포지티브발생회로(PD1)와 네가티브발생회로(ND1) 2개의 패스로 칼럼을 구동하게 된다.Subsequently, in order to drive the second row after the driving of the first row is completed, the switches SWP1 and SWN1 are turned on by the operation unit 200 and the other switches SWP2 to SWPn and SWN2 to SWNn are turned off. Then, the driving path is divided into two paths of the positive generation circuit PD and the negative generation circuit ND of the output driver 10 and the positive generation circuit PD1 and the negative generation circuit ND1 of the auxiliary driver 100. Will be driven.
이때, 상기 조작부(200)는 카운터로 이루어지며, 또한 상기 스위치(SWP1 ~SWPn)는 엔모스트랜지스터, 스위치(SWN1~SWNn)는 피모스트랜지스터로 구성할 수 있으며, 반대로 스위치(SWP1 ~SWPn)는 피모스트랜지스터, 스위치(SWN1~SWNn)는 엔모스트랜지스터로 구성할수 있다.At this time, the operation unit 200 is made of a counter, and the switches (SWP1 to SWPn) may be configured as an en-mo transistor, the switches (SWN1 to SWNn) as a PMOS transistor, on the contrary, the switches (SWP1 to SWPn) The PMOS transistors and the switches SWN1 to SWNn can be configured as enMOS transistors.
그리고, N번째 로우를 구동할 때는 출력구동부(10)의 포지티브발생회로(PD) 및 네가티브발생회로(ND)로부터 발생되는 네가티브신호 또는 포지티브신호를 조작신호에 의해 스위칭하는 다수의 스위치(SWP1~SWPn,SWN1~SWNn)를 온시켜 보조구동부(100)의 포지티브발생회로(PD1~PDn)와 네가티브발생회로(ND1~NDn)의 N+1개의 패스로 칼럼을 구동하게 된다.When driving the Nth row, a plurality of switches SWP1 to SWPn for switching a negative signal or a positive signal generated from the positive generation circuit PD and the negative generation circuit ND of the output driver 10 by an operation signal. SWN1 to SWNn are turned on to drive the column in N + 1 passes of the positive generation circuit PD1 to PDn and the negative generation circuit ND1 to NDn of the auxiliary driving unit 100.
모든 로우가 구동된 후에는 상기와 같은 과정을 반복하여 티에프티 엘씨디 판넬을 구동한다.After all rows have been driven, the above process is repeated to drive the TFT LCD panel.
이상에서 상세히 설명한 바와같이 본 발명은 구동하고자 하는 픽셀에 따라 최적의 구동회로를 내부적으로 구성하여 픽셀간의 신호지연 시간차이를 최소화하여 화질을 향상시킬 수 있는 효과가 있다.As described in detail above, the present invention has an effect of minimizing a signal delay time difference between pixels by internally configuring an optimal driving circuit according to pixels to be driven, thereby improving image quality.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980060252A KR100300061B1 (en) | 1998-12-29 | 1998-12-29 | TFT LCD's Column Drive Amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980060252A KR100300061B1 (en) | 1998-12-29 | 1998-12-29 | TFT LCD's Column Drive Amplifier |
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| Publication Number | Publication Date |
|---|---|
| KR20000043828A KR20000043828A (en) | 2000-07-15 |
| KR100300061B1 true KR100300061B1 (en) | 2001-11-02 |
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| KR1019980060252A Expired - Fee Related KR100300061B1 (en) | 1998-12-29 | 1998-12-29 | TFT LCD's Column Drive Amplifier |
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| KR100522855B1 (en) * | 2002-12-03 | 2005-10-24 | 학교법인 한양학원 | Driving method and its circuit for large area and high resolution TFT-LCDs |
| KR100893392B1 (en) * | 2007-10-18 | 2009-04-17 | (주)엠씨테크놀로지 | Voltage amplifying output circuit and driving device of liquid crystal display device using same |
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- 1998-12-29 KR KR1019980060252A patent/KR100300061B1/en not_active Expired - Fee Related
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