KR100280643B1 - Liquid crystal drive to eliminate crosstalk - Google Patents
Liquid crystal drive to eliminate crosstalk Download PDFInfo
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- KR100280643B1 KR100280643B1 KR1019980050152A KR19980050152A KR100280643B1 KR 100280643 B1 KR100280643 B1 KR 100280643B1 KR 1019980050152 A KR1019980050152 A KR 1019980050152A KR 19980050152 A KR19980050152 A KR 19980050152A KR 100280643 B1 KR100280643 B1 KR 100280643B1
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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
- 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
- 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
- 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
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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
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
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Abstract
이 발명은 크로스토크를 제거하는 액정 구동 장치에 관한 것으로, N개의 게이트 라인과 M개의 데이터 라인, 그리고, 상기 게이트 라인과 데이터 라인의 수직 교차부분에 위치한 액정을 가지며, 데이터 전압과 공통 전압을 입력받는 패널과, 상기 패널로부터 인가되어진 공통 전압을 검출하고, 검출한 공통 전압을 중간 그레이의 계조 전압 입력단에 입력되도록 하여 공통 전압에 대해 보상된 계조 전압이 발생되도록 하는 계조 전압 보상부와, 상기 계조 전압 보상부에서 출력하는 전압에 따라 보상된 계조 전압을 발생시키는 계조 전압 발생부로 이루어진 크로스토크를 제거한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal drive device that eliminates crosstalk, and includes N gate lines and M data lines, and a liquid crystal positioned at a vertical intersection of the gate line and the data line, and inputs a data voltage and a common voltage. A gradation voltage compensator for detecting a receiving panel, a common voltage applied from the panel, and inputting the detected common voltage to the gradation voltage input terminal of the middle gray to generate a gradation voltage compensated for the common voltage; The crosstalk of the gray voltage generator which generates the gray voltage compensated according to the voltage output from the voltage compensator is removed.
Description
본 발명은 TFT(Thin Film Transistor) LCD(Liquid Crystal Display)에 관한 것으로서, 특히 크로스토크(cross talk)를 보상하는 액정 구동 에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to thin film transistor (TFT) liquid crystal displays (LCDs), and more particularly, to liquid crystal driving that compensates for cross talk.
박막 트랜지스터(TFT) 액정 표시 장치는 박형단소의 플래트(flat) 패널 디스플레이(display)중 선명성과 높은 화질을 가진 것을 장점으로 성장하고 있지만, 아직 근본적으로 개선해야 할 문제점도 가지고 있다.Thin-film transistor (TFT) liquid crystal display devices are growing with the advantages of having high definition and high image quality among thin flat panel displays, but still have problems to be fundamentally improved.
그중 크로스 토크는 박막 트랜지스터 액정 표시 장치의 두 가지 구동 방법인 고전압 구동, 저전압 구동중 하나인 저전압 구동에서 고질적인 문제로 남아있고, 이를 개선하기 위해 많은 방법들이 연구되고 있다.Among them, crosstalk remains a chronic problem in the low voltage driving, which is one of two driving methods of the thin film transistor liquid crystal display, high voltage driving and low voltage driving, and many methods have been studied to improve the cross talk.
여기서, 저전압 구동은 게이트 구동 전압의 스윙 폭을 작게 하는 구동 방식으로 공통 전압의 스윙이 계조 전압의 스윙과 반대가 되도록 한다. 즉, 반주기 딜레이된 스윙이 되도록 한다.Here, the low voltage driving is a driving method of reducing the swing width of the gate driving voltage such that the swing of the common voltage is opposite to the swing of the gray voltage. That is, the half cycle delayed swing.
이러한 방법중 하나인 크로스 토크 보상회로 적용방법은 패널(panel)을 거쳐서 왜곡된 공통 전압 신호를 적정 변환 회로를 통해 계조 전압 입력으로 사용함으로써, 화면의 명암이 변화되더라도 액정의 전압의 왜곡을 보상하여 크로스 토크를 줄이는 방법이다.One of these methods, the crosstalk compensation circuit application method, uses a common voltage signal that is distorted through a panel as a gray voltage input through an appropriate conversion circuit, thereby compensating for the distortion of the voltage of the liquid crystal even if the contrast of the screen is changed. How to reduce cross talk?
도1은 종래의 크로스 토크 보상 회로 적용 방법을 나타낸 도면이다.1 is a view showing a conventional method of applying a crosstalk compensation circuit.
도1을 참조한 종래의 크로스 토크 보상 방법을 보면, 패널(1)로부터 인가되는 공통 전압(Vcom)을 계조 전압의 입력으로 하기 위해 버퍼 IC(2)에 입력시킨다.Referring to the conventional cross talk compensation method with reference to Fig. 1, the common voltage Vcom applied from the panel 1 is input to the buffer IC 2 in order to serve as the input of the gradation voltage.
버퍼 IC(2)는 A1∼A11,B1∼B11의 22개의 파형을 인가받아 감마(gamma)1∼감마11의 11개의 계조 전압을 출력한다.The buffer IC 2 receives 22 waveforms of A1 to A11 and B1 to B11 and outputs 11 gray voltages of gamma1 to gamma11.
여기서, 공통 전압(Vcom)은 버퍼 IC(2)의 A1과 B11에 입력되어 계조 발생부(2)로 인가되는 계조 전압 발생을 위한 전압으로 사용된다.Here, the common voltage Vcom is used as a voltage for generating a gray voltage which is input to A1 and B11 of the buffer IC 2 and applied to the gray generator 2.
B1은 버퍼 IC(2)로 입력되는 파형중 가장 높은 전압을 가지고, A11은 가장 낮은 전압을 가진다.B1 has the highest voltage among the waveforms input to the buffer IC 2, and A11 has the lowest voltage.
따라서, B1과 A11은 인가되는 보정된 공통 전압(Vcom)이 정상 계조 입력 전압과 더하여져 버퍼 IC(2)의 허용최고 전압인 VDD+0.3V를 초과하는 경우와 허용 최저 전압인 GND-0.3V를 미달하는 경우를 발생시킨다.Accordingly, B1 and A11 are applied when the corrected common voltage Vcom applied is added to the normal gray scale input voltage to exceed the maximum allowable voltage VDD + 0.3V of the buffer IC 2 and the minimum allowable voltage GND-0.3V. It causes the case of less than.
상기의 내용은 도2에 도시되어 있다. 도2의 (1)은 버퍼 IC(1)로 인가되는 공통 전압의 파형을 나타내고, (2)는 계조 전압 발생부(2)에서 출력하는 계조 전압의 파형도이다.The above is shown in FIG. 2 shows a waveform of a common voltage applied to the buffer IC 1, and (2) shows a waveform diagram of the gray voltage output from the gray voltage generator 2. As shown in FIG.
(2)에서 보면, 출력되는 계조 전압은 IC 입력 전압의 허용치보다 높거나 낮은 부분이 있다.As shown in (2), the output gradation voltage is higher or lower than the allowable value of the IC input voltage.
따라서, 이러한 계조 입력 전압의 허용치 초과는 계조 입력단의 버퍼 IC 또는 소스 드라이브 IC로 입력될 때 허용치 이상의 전압이 순간적으로 인가되어 제품에 이상 전류(over current)가 흐르거나 IC에 손상을 주게 되는 단점이 있다.Therefore, the above-mentioned allowance of the gray scale input voltage has a disadvantage in that a voltage exceeding the allowable moment is instantaneously applied to the buffer IC or the source drive IC of the gray scale input stage, causing an over current to flow into the product or damaging the IC. have.
따라서, 이 발명은 크로스 토크 보상 회로 적용시의 효과는 그대로 유지하면서 계조 전압단의 피크 전압이 버퍼 IC나 드라이브 IC의 허용치 이상을 넘어서 입력되는 것을 방지하도록 한다.Therefore, the present invention prevents the peak voltage of the gradation voltage stage from being input beyond the allowable value of the buffer IC or the drive IC while maintaining the effect of applying the crosstalk compensation circuit.
도1은 종래의 크로스토크 보상 회로 적용 방법을 나타낸 도면이다.1 is a view showing a conventional method for applying a crosstalk compensation circuit.
도2는 종래의 저전압 구동 방식을 사용하였을 때의 공통 전압과 계조 전압의 파형도이다.2 is a waveform diagram of a common voltage and a gradation voltage when a conventional low voltage driving method is used.
도3은 이 발명의 실시예에 따른 크로스토크를 제거하는 액정 구동 장치를 나타낸 도면이다.3 is a view showing a liquid crystal driving apparatus for removing crosstalk according to an embodiment of the present invention.
도4는 이 발명의 제1 실시예에 인가되는 공통 전압 및 출력 계조 전압의 파형도이다.Fig. 4 is a waveform diagram of a common voltage and an output gray voltage applied to the first embodiment of this invention.
상기의 목적을 달성하기 위한 본 발명은,The present invention for achieving the above object,
패널과, 계조 전압 발생부와 계조 전압 보상부로 이루어져 있다.And a panel, a gray voltage generator and a gray voltage compensator.
상기 패널은 액정에 대한 데이터 전압과 공통 전압을 입력받는다.The panel receives a data voltage and a common voltage for the liquid crystal.
상기 계조 전압 보상부는 상기 패널로부터 인가되어진 공통 전압을 검출하고, 중간 그레이 계조 입력단의 입력으로 하여 보상된 계조 전압이 발생되도록 한다.The gray voltage compensator detects a common voltage applied from the panel, and generates a compensated gray voltage by using an input of an intermediate gray gray input terminal.
상기 계조 전압 발생부는 상기 계조 전압 보상부에서 출력하는 전압에 따라 보상된 계조 전압을 발생시킨다.The gray voltage generator generates a compensated gray voltage according to the voltage output from the gray voltage compensator.
이하, 이 발명의 실시예를 도3을 참조하여 설명한다.An embodiment of this invention is described below with reference to FIG.
도3은 이 발명의 실시예에 따른 크로스토크를 제거하는 액정 구동 장치를 나타낸 도면이다.3 is a view showing a liquid crystal driving apparatus for removing crosstalk according to an embodiment of the present invention.
도3에 도시된 이 발명의 실시예에 따른 크로스토크를 제거하는 액정 구동 회로는,The liquid crystal drive circuit for removing crosstalk according to the embodiment of the present invention shown in FIG.
패널(100)과, 버퍼 IC(200)와, 계조 전압 발생부(300)로 이루어진다.The panel 100, the buffer IC 200, and the gray voltage generator 300 are provided.
패널(100)은 N개의 게이트 라인과 M개의 데이터 라인을 가지고, 게이트 라인과 데이터 라인이 수직 교차하는 부분에 액정이 위치되어 있으며, 액정을 구동시키기 위해 공통 전압(Vcom)과 계조 전압을 입력받는다.The panel 100 has N gate lines and M data lines, and a liquid crystal is positioned at a vertical intersection of the gate line and the data line, and receives a common voltage Vcom and a gray voltage to drive the liquid crystal. .
버퍼 IC(200)는 패널(100)에 인가되는 공통 전압(Vcom)을 검출하여 공통 전압(Vcom)을 중간 그레이 계조 전압의 입력단의 입력으로 하고, 공통 전압(Vcom)과 계조 발생 전압을 가산하여 보정된 계조 발생 전압을 출력한다.The buffer IC 200 detects the common voltage Vcom applied to the panel 100, sets the common voltage Vcom as an input of an input terminal of the middle gray gray voltage, and adds the common voltage Vcom and the gray level generating voltage. The corrected gradation generating voltage is output.
계조 전압 발생부(300)는 버퍼 IC(300)로부터 입력되는 계조 발생 전압에 따라 보정된 계조 전압을 출력한다.The gray voltage generator 300 outputs a gray voltage corrected according to the gray voltage generated from the buffer IC 300.
여기서, 버퍼 IC(200)는 A1∼A11, B1∼B11의 계조 발생 신호 입력단을 가지며, A1에서부터 A11의 순으로 전압 레벨이 낮아지고, B1에서부터 B11의 순으로 전압 레벨이 낮아진다. 따라서, A1에 인가되는 계조 발생 전압이 가장 높고 B11에 인가되는 계조 발생 전압이 가장 낮다.Here, the buffer IC 200 has the gradation generation signal input terminals of A1 to A11 and B1 to B11, and the voltage level decreases in the order of A1 to A11, and the voltage level decreases in the order of B1 to B11. Therefore, the gradation generating voltage applied to A1 is the highest and the gradation generating voltage applied to B11 is the lowest.
A로 표기된 입력단은 포지티브 전압을 인가받고 나타내고, B로 표기된 입력단은 네가티브 전압을 인가받는다.An input terminal denoted by A is applied with a positive voltage, and an input terminal denoted by B is applied with a negative voltage.
그리고, 여기서 액정 구동은 저전압 구동 방식에 따른다.In this case, the liquid crystal driving is based on a low voltage driving method.
저전압 구동 방식이란 액정에 인가되는 전압의 스위칭 폭을 작게 하기 위해 공통 전압(Vcom,Vcomb)을 계조 전압의 출력과 반주기 차이로 스윙시키는 구동이다.The low voltage driving method is a drive for swinging the common voltages Vcom and Vcomb by a half period difference from the output of the gray scale voltage in order to reduce the switching width of the voltage applied to the liquid crystal.
여기서, Vcom은 포지티브 전압을 나타내고, Vcomb은 네가티브 전압이며, 두 전압(Vcom,Vcomb)의 절대치는 같다.Here, Vcom represents a positive voltage, Vcomb is a negative voltage, and the absolute values of the two voltages Vcom and Vcomb are the same.
패널(100)의 액정은 공통 전압(Vcom)과 계조 전압의 차이에 따라 동작을 달리하여 표현하는 색을 달리한다.The liquid crystal of the panel 100 may change colors represented by different operations according to the difference between the common voltage Vcom and the gray voltage.
그러나, 이때 데이터 라인과 도시하지 않은 게이트 라인간의 크로스토크에 의해 공통 전압(Vcom,vcomb)이 영향을 받으며, 그에 따른 공통 전압(Vcom,vcomb)의 파형은 도4의 (1)과 같다.However, at this time, the common voltages Vcom and vcomb are affected by the crosstalk between the data lines and the gate lines (not shown), and the waveforms of the common voltages Vcom and vcomb are as shown in FIG.
도4는 이 발명의 제1 실시예에 인가되는 공통 전압 및 출력 계조 전압의 파형도이다.Fig. 4 is a waveform diagram of a common voltage and an output gray voltage applied to the first embodiment of this invention.
도4의 (1)과 같이 공통 전압(Vcom,Vcomb)의 인가 형태가 찌그러지면, 액정은 목표 동작을 수행하지 못하게 된다. 즉, 공통 전압(Vcom,Vcomb)과 계조 전압의 차이에 따른 동작이 공통 전압(Vcom,Vcomb)의 찌그러짐으로 인해 목표 동작을 정확히 수행하지 못하게 된다.If the application form of the common voltages Vcom and Vcomb is distorted as shown in FIG. 4 (1), the liquid crystal does not perform the target operation. That is, the operation according to the difference between the common voltages Vcom and Vcomb and the gray scale voltage is not correctly performed due to the distortion of the common voltages Vcom and Vcomb.
따라서, 이러한 문제점을 해결하기 위해 도4의 (1)과 같은 파형을 가지는 공통 전압(Vcom,Vcomb)은 패널(100)로부터 버퍼 IC(200)로 입력된다.Therefore, in order to solve this problem, the common voltages Vcom and Vcomb having the waveforms as shown in FIG. 4 (1) are input from the panel 100 to the buffer IC 200.
이때, 공통 전압(Vcom,Vcomb)은 A2 및 B10의 계조 발생 입력단으로 입력된다. 여기서, 공통 전압(Vcom,Vcomb)의 버퍼 IC(200)로의 입력은 A2 및 B10에 한하지 않으며, 계조 발생 전압이 가장 큰 A1 및 계조 발생 전압이 가장 작은 B11을 제외한 입력단에 입력될 수 있다.At this time, the common voltages Vcom and Vcomb are input to the gray scale generation input terminals of A2 and B10. Here, the inputs of the common voltages Vcom and Vcomb to the buffer IC 200 are not limited to A2 and B10, and may be input to input terminals except for A1 having the largest gray voltage and B11 having the smallest gray voltage.
이렇게 버퍼 IC(200)로 입력된 공통 전압(Vcom,Vcomb)은 해당 계조를 발생시키기 위해 계조 발생부(300)로 입력되는 계조 입력 전압의 레벨을 가변시키게 된다. 즉, 발생될 계조 전압이 공통 전압(Vcom,Vcomb)의 찌그러짐에 영향을 받게된다.The common voltages Vcom and Vcomb input to the buffer IC 200 may vary the level of the grayscale input voltage input to the grayscale generator 300 to generate the grayscale. That is, the gray voltage to be generated is affected by the distortion of the common voltages Vcom and Vcomb.
계조 발생부(300)는 버퍼 IC(200)로부터 입력되는 계조 발생 전압을 입력받아 해당하는 계조 전압을 출력하며, 이때 출력되는 계조 전압의 파형은 도4의 (2)와 같으며, 도4는 발생될 계조 전압이 공통 전압(Vcom,Vcomb)의 찌그러짐에 영향을 받게 됨을 보여준다.The gray scale generator 300 receives a gray scale generation voltage input from the buffer IC 200 and outputs a corresponding gray scale voltage. The waveform of the gray scale voltage output is the same as in FIG. 4 (2), and FIG. The gray voltage to be generated is affected by the distortion of the common voltages Vcom and Vcomb.
도4의 (1)과 (2)를 비교해보면, (1)의 파형이 변하는 방향으로 (2)의 파형이 변하는 것을 알 수 있으며, (1)의 파형과 (2)의 파형과의 차이는 일정하게 유지됨을 알 수 있다.Comparing Fig. 4 (1) and (2), it can be seen that the waveform of (2) changes in the direction in which the waveform of (1) changes, and the difference between the waveform of (1) and the waveform of (2) It can be seen that it remains constant.
도4에 도시된 바와 같이 이 발명은 공통 전압(Vcom,Vcomb)과 계조 전압과의 전압차를 일정하게 유지시켜 저전압 구동 방식에서의 크로스토크를 없앤다.As shown in Fig. 4, the present invention maintains a constant voltage difference between the common voltages Vcom and Vcomb and the gradation voltage, thereby eliminating crosstalk in the low voltage driving method.
이 발명은 저전압 구동 방식에 따른 액정 구동에서 발생된 크로스토크를 제거하는 효과가 있다.This invention has the effect of removing the crosstalk generated in the liquid crystal drive according to the low voltage driving method.
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| KR1019980050152A KR100280643B1 (en) | 1998-11-23 | 1998-11-23 | Liquid crystal drive to eliminate crosstalk |
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| KR1019980050152A KR100280643B1 (en) | 1998-11-23 | 1998-11-23 | Liquid crystal drive to eliminate crosstalk |
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