KR100552278B1 - Liquid crystal display that varies the gate signal - Google Patents

Liquid crystal display that varies the gate signal Download PDF

Info

Publication number
KR100552278B1
KR100552278B1 KR1019970031471A KR19970031471A KR100552278B1 KR 100552278 B1 KR100552278 B1 KR 100552278B1 KR 1019970031471 A KR1019970031471 A KR 1019970031471A KR 19970031471 A KR19970031471 A KR 19970031471A KR 100552278 B1 KR100552278 B1 KR 100552278B1
Authority
KR
South Korea
Prior art keywords
liquid crystal
gate driving
pixel
crystal panel
region
Prior art date
Application number
KR1019970031471A
Other languages
Korean (ko)
Other versions
KR19990009165A (en
Inventor
유봉현
차기석
Original Assignee
삼성전자주식회사
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 삼성전자주식회사 filed Critical 삼성전자주식회사
Priority to KR1019970031471A priority Critical patent/KR100552278B1/en
Publication of KR19990009165A publication Critical patent/KR19990009165A/en
Application granted granted Critical
Publication of KR100552278B1 publication Critical patent/KR100552278B1/en

Links

Images

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
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan 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
    • 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
    • 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
    • G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
    • 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
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections

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)
  • Power Engineering (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

액정 패널의 각 화소에 인가되는 게이트 구동 신호를 온(on)전압 레벨 또는 온 유지 시간이 가변되도록 하여 각 화소에 인가되는 화소 전압의 충전량을 조절할 수 있도록 함으로써 액정 패널의 광 투과율의 조절이 가능하다. It is possible to adjust the light transmittance of the liquid crystal panel by controlling the amount of charge of the pixel voltage applied to each pixel by varying the on voltage level or the on hold time of the gate driving signal applied to each pixel of the liquid crystal panel. .

Description

게이트 신호를 가변하는 액정 표시 장치Liquid crystal display that varies the gate signal

이 발명은 액정 표시 장치(liquid crystal display: LCD)에 관한 것으로서, 보다 상세하게는 박막 트랜지스터(thin film transistor: TFT) 액정 표시 장치를 구동하는 구동 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display (LCD), and more particularly, to a driving device for driving a thin film transistor (TFT) liquid crystal display.

평판 표시 장치의 일종인 TFT-LCD는 전압에 따라 빛의 투과도가 변하는 액정의 특성을 이용한 것으로써, 낮은 전압으로 구동이 가능하고 전력의 소모가 작아서 오늘날 널리 이용되고 있다.TFT-LCD, which is a kind of flat panel display device, uses the characteristics of liquid crystal whose light transmittance changes according to voltage, and is widely used today because it can be driven at low voltage and power consumption is small.

액정 표시 장치의 화면을 표시하는 패널이 대형화함에 따라 제조 공정에서 반복되는 패터닝(patterning)에 필요한 마스크(mask)의 수가 증가하게 된다. 이러한 마스크 수의 증가는 마스크간의 공정 편차를 발생시킨다. As the panel displaying the screen of the liquid crystal display becomes larger, the number of masks required for patterning repeated in the manufacturing process increases. This increase in the number of masks causes process variations between the masks.

이러한 공정 편차는 부정확한 패터닝을 유발시켜, 유지 용량 전극의 면적을 변화시켜 화소간의 유지 용량의 차이를 발생시키거나 TFT의 게이트와 소스 전극간의 정전 용량에 영향을 미친다. 또한 데이터 라인과 화소 전극간의 결합 용량도 변화시켜 불균일한 화질을 만들 수 있다. This process variation causes inaccurate patterning, which changes the area of the storage capacitor electrode, resulting in a difference in the storage capacitance between the pixels, or affects the capacitance between the gate and source electrodes of the TFT. In addition, the coupling capacitance between the data line and the pixel electrode may also be changed to produce non-uniform image quality.

상기한 유지 용량의 차이는 킥백(kickback) 전압의 차이를 발생시키고 따라서 각 화소 전극에 충전되는 화소 전압의 충전량이 달라지게 된다. 이러한 충전량의 차이는 작은 전압에서도 민감하게 반응하는 중간 계조일 경우 더욱 증가되며, 결국 광 투과율을 변화시켜 화질의 균일성을 감소시킨다.The difference in the holding capacitance causes a difference in kickback voltage, and thus the amount of charge of the pixel voltage charged in each pixel electrode is changed. The difference in charge amount is further increased in the case of halftones that react sensitively even at a small voltage, thereby changing the light transmittance to reduce the uniformity of image quality.

이와 같은 불균일한 화질 특성은 화소 전압의 충전량을 조절하면 해결할 수 있다. 종래의 액정 표시 장치는 도 1에서와 같이 화상을 나타내는 액정 패널(10)과 액정 패널의(10)의 각 화소에 화상 신호를 인가하는 소스 구동부(20) 및 각 화소의 구동을 제어하는 게이트 구동부(30)로 구성된다. 도 1에서 점선으로 표시한 마스크간의 경계부(40)를 기준으로 액정 패널(10)의 상부와 하부간의 광 투과율의 차이를 발생시킬 수 있다. 그러나 게이트 구동부(30)는 액정 패널(10) 전면에 대하여 항상 일정한 게이트 구동 신호를 인가하여 각 화소를 구동하기 때문에 종래의 액정 표시 장치에서는 화소에 충전되는 화소 전압의 충전량을 조절을 통하여 상기한 광 투과율의 조정이 곤란하였다. Such non-uniform quality characteristics can be solved by adjusting the charge amount of the pixel voltage. In the conventional liquid crystal display, as shown in FIG. 1, a liquid crystal panel 10 displaying an image, a source driver 20 applying an image signal to each pixel of the liquid crystal panel 10, and a gate driver controlling driving of each pixel. It consists of 30. A difference in light transmittance between the upper part and the lower part of the liquid crystal panel 10 may be generated based on the boundary portion 40 between the masks indicated by dotted lines in FIG. 1. However, since the gate driver 30 drives each pixel by applying a constant gate driving signal to the entire surface of the liquid crystal panel 10 at all times, the conventional liquid crystal display device controls the amount of charge of the pixel voltage charged in the pixel. It was difficult to adjust the transmittance.

본 발명은 이러한 문제점을 해결하기 위한 것으로서, 본 발명의 과제는 각 화소에 인가되는 화소 전압의 충전량을 조절하여 마스크의 경계부에서 발생되는 화질의 불균일 현상을 제거하는 것이다.SUMMARY OF THE INVENTION The present invention has been made to solve this problem, and an object of the present invention is to eliminate the unevenness of the image quality generated at the boundary of the mask by adjusting the charge amount of the pixel voltage applied to each pixel.

이러한 과제를 달성하기 위하여, 본 발명에서는 액정 패널의 각 화소에 게이트 구동 신호를 인가하는 게이트 구동부를 제1 게이트 구동부와 제2 게이트 구동부로 분리하여 각각 액정 패널의 다른 영역을 구동하도록 하였다. 제2 게이트 구동부가 발생하는 게이트 구동 신호는 온(on)전압 레벨 또는 온 유지 시간이 가변되도록 하여 각 화소에 인가되는 전압의 충전량을 조절할 수 있도록 함으로써 액정 패널의 광 투과율의 조절이 가능하다. In order to achieve this problem, in the present invention, the gate driver for applying a gate driving signal to each pixel of the liquid crystal panel is separated into a first gate driver and a second gate driver to drive different regions of the liquid crystal panel. The gate driving signal generated by the second gate driver may control the light transmittance of the liquid crystal panel by varying the on voltage level or the on hold time so that the amount of charge of the voltage applied to each pixel may be adjusted.

이하 본 발명의 바람직한 실시예를 기재한다. 그러나 하기한 실시예는 본 발명의 바람직한 한 실시예일 뿐 본 발명이 하기한 실시예에 한정되는 것은 아니다. Hereinafter, preferred embodiments of the present invention will be described. However, the following examples are only preferred embodiments of the present invention and the present invention is not limited to the following examples.

본 발명의 실시예에 따른 액정 표시 장치를 도 2에 도시하였다. 도 2에서와 같이 본 발명에 따른 액정 표시 장치는 화상을 나타내는 액정 패널(10)과 액정 패널(10)의 각 화소에 화상 신호를 인가하는 소스 구동부(20) 및 각 화소의 구동을 제어하는 제1 게이트 구동부(31) 및 제2 게이트 구동부(32)로 구성된다.2 illustrates a liquid crystal display according to an exemplary embodiment of the present invention. As shown in FIG. 2, the liquid crystal display according to the present invention includes a liquid crystal panel 10 for displaying an image, a source driver 20 for applying an image signal to each pixel of the liquid crystal panel 10, and a driving device for controlling driving of each pixel. The first gate driver 31 and the second gate driver 32 are provided.

제1 및 제2 게이트 구동부(31, 32)는 상기 액정 패널(10)을 분리하여 각각 구동한다. 즉, 도 1의 액정 패널(10)에서 점선으로 표시된 마스크간의 경계부(40)를 기준으로 패널(10)의 상부는 제1 게이트 구동부(31)가 게이트 구동 신호를 인가하고, 패널(10)의 하부는 제2 게이트 구동부(32)가 게이트 구동 신호를 인가한다.The first and second gate drivers 31 and 32 separate and drive the liquid crystal panel 10, respectively. That is, in the liquid crystal panel 10 of FIG. 1, the first gate driver 31 applies a gate driving signal to the upper portion of the panel 10 based on the boundary portion 40 between the masks indicated by dotted lines. In the lower portion, the second gate driver 32 applies a gate driving signal.

이 때 인가되는 게이트 구동 신호를 도 3에 나타내었다. 도 3에서와 같이 제1 게이트 구동부(31)에서는 일정한 레벨(level)의 펄스로 된 제1 게이트 구동 신호를 인가하고, 제2 게이트 구동부(32)에서는 크기가 가변되는 펄스로 된 제2 게이트 구동 신호를 인가한다. 여기서 Von은 각 화소를 구동시키는 레벨이고 Voff는 화소가 구동되지 않는 레벨이다. 예를 들어 제1 게이트 구동 신호가 20V의 Von 레벨과 -10V의 Voff 레벨을 갖는다면, 제2 게이트 구동 신호는 15V, 20V 및 25V로 가변되는 Von 레벨과 -10V의 Voff 레벨을 갖는다.3 illustrates a gate driving signal applied at this time. As shown in FIG. 3, the first gate driver 31 applies a first gate drive signal having a pulse of a predetermined level, and the second gate driver 32 uses a second gate drive having a variable size. Apply a signal. Where Von is the level at which each pixel is driven and Voff is the level at which the pixel is not driven. For example, if the first gate driving signal has a Von level of 20V and a Voff level of -10V, the second gate driving signal has a Von level varying from 15V, 20V, and 25V and a Voff level of -10V.

13.3" XGA 화상 모드에서 게이트 구동 신호의 레벨에 따른 계조비(contrast ratio)를 도 4에 나타내었다. 도 4에서 화면의 밝기는 게이트 구동 신호 레벨에 의존함을 알 수 있다. 따라서 상기한 실시예에서와 같이 게이트 구동 신호의 레벨을 조절함으로써 액정 패널의 화면 밝기의 조절이 가능하다.In the 13.3 "XGA image mode, the contrast ratio according to the level of the gate driving signal is shown in FIG. 4. It can be seen that the brightness of the screen depends on the gate driving signal level in FIG. As described above, the brightness of the screen of the liquid crystal panel may be adjusted by adjusting the level of the gate driving signal.

게이트 구동 신호를 가변시키는 또 다른 방법으로 게이트 구동 신호가 온 상태를 유지하는 시간을 조절할 수 있다. 도 5에 서로 다른 온 시간을 갖는 게이트 구동 신호를 나타내었다. 도 5에서 제1 게이트 구동 신호와 제2 게이트 구동 신호의 온 시간은 Δt 만큼 차이가 난다. 따라서 액정 패널(10)의 화소에 제1 게이트 구동 신호로 인가되는 화상 신호 Vd1과 제2 게이트 구동 신호로 인가되는 화상 신호 Vd2는 ΔV 만큼의 차이가 나서 화소에 충전되는 전압의 크기가 달라진다. 따라서 게이트 구동 신호의 온 시간을 가변하여 액정 패널(10)에 인가함으로써 광 투과율을 조절할 수 있다. As another method of varying the gate driving signal, the time for which the gate driving signal remains on may be adjusted. 5 shows gate driving signals having different on times. In FIG. 5, the on time of the first gate driving signal and the second gate driving signal is different by Δt. Therefore, the image signal Vd1 applied as the first gate driving signal to the pixel of the liquid crystal panel 10 and the image signal Vd2 applied as the second gate driving signal differ by ΔV, and thus the magnitude of the voltage charged in the pixel is changed. Therefore, the light transmittance may be adjusted by varying the on time of the gate driving signal to the liquid crystal panel 10.

상기한 바와 같이, 본 발명에 따른 액정 표시 장치에서는 액정 패널에 인가되는 게이트 구동 신호의 크기와 온 시간을 가변시켜 마스크간의 공정 편차에 기인한 각 화소의 충전량의 차이를 보정할 수 있다. 따라서 액정 패널의 광 투과율을 고르게 하여 화질의 불균일 특성을 감소시킬 수 있다.As described above, in the liquid crystal display according to the present invention, the size of the gate driving signal applied to the liquid crystal panel and the on time may be varied to correct the difference in the amount of charge of each pixel due to the process variation between the masks. Therefore, the light transmittance of the liquid crystal panel may be even, thereby reducing the nonuniformity of the image quality.

비록 이 발명은 가장 실제적이며 바람직한 실시예를 참조하여 설명되었지만, 이 발명은 상기 개시된 실시예에 한정되지 않으며, 후술되는 청구의 범위 내에 속하는 다양한 변형 및 등가물들도 포함한다.Although this invention has been described with reference to the most practical and preferred embodiments, the invention is not limited to the embodiments disclosed above, but also includes various modifications and equivalents which fall within the scope of the following claims.

도 1에 종래의 액정 표시 장치의 구조를 나타낸 구성도이고,1 is a configuration diagram showing the structure of a conventional liquid crystal display device,

도 2는 본 발명의 실시예에 따른 액정 표시 장치의 구조를 나타낸 구성도이고,2 is a block diagram illustrating a structure of a liquid crystal display according to an exemplary embodiment of the present invention.

도 3은 도 2의 액정 패널에 인가되는 게이트 구동 신호를 나타낸 것이고,3 illustrates a gate driving signal applied to the liquid crystal panel of FIG. 2.

도 4는 게이트 구동 신호와 액정 패널의 계조비와의 관계를 도시한 그래프이고,4 is a graph showing the relationship between the gate driving signal and the gray scale ratio of the liquid crystal panel;

도 5는 도 2의 액정 패널에 인가되는 게이트 구동 신호와 화상 신호를 함께 나타낸 것이다. FIG. 5 illustrates a gate driving signal and an image signal applied to the liquid crystal panel of FIG. 2.

Claims (3)

화상을 표시하며, 제1 영역 및 제2 영역을 포함하고, 상기 제1 영역은 상기 제2 영역과 서로 인접하고 있는 액정 패널,A liquid crystal panel displaying an image, the liquid crystal panel comprising a first region and a second region, wherein the first region is adjacent to the second region; 상기 액정 패널의 각 화소에 화상 신호를 인가하는 소스 구동 회로,A source driving circuit for applying an image signal to each pixel of the liquid crystal panel; 상기 액정 패널의 상기 제1 영역에 있는 화소의 구동을 제어하는 게이트 구동 신호를 발생하는 제1 게이트 구동 회로 및A first gate driving circuit generating a gate driving signal for controlling driving of a pixel in the first region of the liquid crystal panel; 상기 액정 패널의 상기 제2 영역에 있는 화소의 구동을 제어하며 상기 제1 영역과 상기 제2 영역의 경계부의 화소에서 충전량의 차이를 보정하기 위하여 가변되는 게이트 구동 신호를 발생하는 제2 게이트 구동 회로를 포함하며,A second gate driving circuit configured to control driving of a pixel in the second region of the liquid crystal panel and to generate a gate driving signal that is varied to correct a difference in charge amount in a pixel at a boundary between the first region and the second region Including; 상기 제1 영역과 상기 제2영역은 서로 다른 마스크로 노광되는The first area and the second area are exposed with different masks. 액정 표시 장치.Liquid crystal display. 제1항에서, In claim 1, 상기 제2 게이트 구동 회로의 게이트 구동 신호는The gate driving signal of the second gate driving circuit is 신호의 전압 레벨이 가변되는The voltage level of the signal is variable 액정 표시 장치.Liquid crystal display. 제1항에서, In claim 1, 상기 제2 게이트 구동 회로의 게이트 구동 신호는The gate driving signal of the second gate driving circuit is 신호의 레벨 유지 시간이 가변되는The level holding time of the signal is variable 액정 표시 장치.Liquid crystal display.
KR1019970031471A 1997-07-08 1997-07-08 Liquid crystal display that varies the gate signal KR100552278B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019970031471A KR100552278B1 (en) 1997-07-08 1997-07-08 Liquid crystal display that varies the gate signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019970031471A KR100552278B1 (en) 1997-07-08 1997-07-08 Liquid crystal display that varies the gate signal

Publications (2)

Publication Number Publication Date
KR19990009165A KR19990009165A (en) 1999-02-05
KR100552278B1 true KR100552278B1 (en) 2006-05-16

Family

ID=37181311

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019970031471A KR100552278B1 (en) 1997-07-08 1997-07-08 Liquid crystal display that varies the gate signal

Country Status (1)

Country Link
KR (1) KR100552278B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9524687B2 (en) 2014-01-22 2016-12-20 Samsung Display Co., Ltd. Method of driving a display panel, display panel driving apparatus for performing the method and display apparatus having the display panel driving apparatus

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100483398B1 (en) * 1997-08-01 2005-08-31 삼성전자주식회사 How to Operate Thin Film Transistor Liquid Crystal Display
KR100483400B1 (en) * 1997-08-13 2005-11-03 삼성전자주식회사 Driving Method of LCD
KR100537886B1 (en) * 1998-06-26 2006-03-14 삼성전자주식회사 Thin-film transistor liquid crystal display with adjustable gate-on voltage waveform
KR100666317B1 (en) * 1999-12-15 2007-01-09 삼성전자주식회사 Module for determing applied time of driving signal and liquid crystal display assembly having the same and method for driving liquid crystal display assembly
KR100806904B1 (en) * 2001-10-30 2008-02-22 삼성전자주식회사 A Device for driving Liquid Crystal Display
KR100926104B1 (en) * 2002-12-27 2009-11-11 엘지디스플레이 주식회사 Liquid Crystal Display and Driving Method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05158439A (en) * 1991-12-03 1993-06-25 Toshiba Corp Liquid crystal display device
JPH07261705A (en) * 1994-03-18 1995-10-13 Fujitsu Ltd Liquid crystal display device, its driving method and driving circuit
JPH08171368A (en) * 1994-12-19 1996-07-02 Sharp Corp Display controller for liquid crystal display system
KR970022933A (en) * 1995-10-17 1997-05-30 구자홍 Driving Circuit of Active Matrix Liquid Crystal Display

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05158439A (en) * 1991-12-03 1993-06-25 Toshiba Corp Liquid crystal display device
JPH07261705A (en) * 1994-03-18 1995-10-13 Fujitsu Ltd Liquid crystal display device, its driving method and driving circuit
JPH08171368A (en) * 1994-12-19 1996-07-02 Sharp Corp Display controller for liquid crystal display system
KR970022933A (en) * 1995-10-17 1997-05-30 구자홍 Driving Circuit of Active Matrix Liquid Crystal Display

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9524687B2 (en) 2014-01-22 2016-12-20 Samsung Display Co., Ltd. Method of driving a display panel, display panel driving apparatus for performing the method and display apparatus having the display panel driving apparatus

Also Published As

Publication number Publication date
KR19990009165A (en) 1999-02-05

Similar Documents

Publication Publication Date Title
US5940055A (en) Liquid crystal displays with row-selective transmittance compensation and methods of operation thereof
KR100895303B1 (en) Liquid crystal display and driving method thereof
US7196683B2 (en) Driving method of image display device, driving device of image display device, and image display device
US20060232503A1 (en) Active matrix-type liquid crystal display device
KR100438521B1 (en) Liquid Crystal Display With Light Shutter and Apparatus and Method of Driving The Same
US7768489B2 (en) Method for driving a liquid crystal display
KR20040026009A (en) Liquid crystal display and driving method thereof
KR100239013B1 (en) Liquid crystal display device with thin-film transistor for switching element
US6850289B2 (en) Array substrate for liquid crystal display device
KR100552278B1 (en) Liquid crystal display that varies the gate signal
KR100483400B1 (en) Driving Method of LCD
KR100853209B1 (en) liquid crystal device and driving device thereof
US6570549B2 (en) Method of driving a liquid crystal display
KR100344365B1 (en) Driving method for liquid crystal device
US6344842B1 (en) Liquid crystal display device and a driving method therefor
JP2004279535A (en) Liquid crystal display device
KR20050057121A (en) Active matrix liquid crystal display devices with feedback control of drive signals
KR20040062048A (en) liquid crystal display device
JP2003215536A (en) Liquid crystal display device and driving method therefor
KR100483531B1 (en) Drive circuit for liquid crystal display with double gate signal voltage
JPH09179098A (en) Display device
KR100333985B1 (en) Liquid crystal display and driving method thereof
KR100928485B1 (en) Liquid crystal display
KR20030056526A (en) method for driving of liquid crystal display
JPH06118910A (en) Method for driving liquid crystal display device

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
AMND Amendment
E601 Decision to refuse application
J201 Request for trial against refusal decision
AMND Amendment
E902 Notification of reason for refusal
B701 Decision to grant
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20120116

Year of fee payment: 7

LAPS Lapse due to unpaid annual fee