KR20080071657A - Electrodes for lcd - Google Patents

Electrodes for lcd Download PDF

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KR20080071657A
KR20080071657A KR1020070009773A KR20070009773A KR20080071657A KR 20080071657 A KR20080071657 A KR 20080071657A KR 1020070009773 A KR1020070009773 A KR 1020070009773A KR 20070009773 A KR20070009773 A KR 20070009773A KR 20080071657 A KR20080071657 A KR 20080071657A
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electrodes
electrode
pixel
axis
electrode column
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KR1020070009773A
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Korean (ko)
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KR100866534B1 (en
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김종현
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충남대학교산학협력단
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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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Geometry (AREA)
  • Liquid Crystal (AREA)

Abstract

Electrodes for an LCD device are provided to arrange the electrodes to cross each other horizontally and vertically and configure y-axis electrodes and x-axis electrodes to be insulated from each other, thereby driving plural pixels at a time to improve energy efficiency. Electrodes for an LCD device include a y-axis electrode column(100) and an x-axis electrode column(200). A pair of y-axis electrodes(110,120) are respectively arranged in a y-axis direction in both sides of a pixel(10) around the pixel with a gap between pixels. The x-axis electrode column is perpendicular to the y-axis electrodes. A pair of x-axis electrodes(210,220) are respectively arranged in an x-axis direction in both sides of the pixel around the pixel with a gap between the pixels. An insulating member(300) is additionally installed between the y-axis electrode column and the x-axis electrode column.

Description

액정 표시 장치의 전극{Electrodes for LCD}Electrode of liquid crystal display {Electrodes for LCD}

도 1은 본 발명에 따른 액정 표시 장치의 전극의 일예를 도시한 평면도이다. 1 is a plan view illustrating an example of an electrode of a liquid crystal display according to the present invention.

도 2는 본 발명에 따른 액정 표시 장치의 전극의 적층 구조를 도시한 조립 사시도이다.2 is an assembled perspective view illustrating a laminated structure of electrodes of a liquid crystal display according to the present invention.

도 3은 종래의 액정 표시 장치의 전극을 도시한 평면도이다. 3 is a plan view illustrating an electrode of a conventional liquid crystal display.

<도면의 주요 부분에 대한 부호설명><Code Description of Main Parts of Drawing>

100 : 종축 전극열100: vertical electrode string

110, 120 : 종축 전극 111, 121 : 홈부    110, 120: vertical electrode 111, 121: groove portion

200 : 횡축 전극열200: horizontal electrode row

210, 220 : 횡축 전극 211, 221 : 홈부    210, 220: horizontal electrode 211, 221: groove portion

300 : 전열체300: heating element

10 : 픽셀10 pixels

본 발명은 액정 표시 장치의 전극에 관한 것으로 상세하게는 종횡으로 서로 엇갈리게 전극을 배열하고, 종측 전극과 횡측 전극이 서로 절연을 이루게 구성하여 한번에 여러 개의 화소를 구동시킬 수 있게 함으로서 에너지 효율을 향상시킨 액정 표시 장치의 전극에 관한 것이다. The present invention relates to an electrode of a liquid crystal display device. In detail, the electrodes are alternately arranged vertically and horizontally, and the vertical electrode and the horizontal electrode are insulated from each other to drive several pixels at once, thereby improving energy efficiency. It relates to an electrode of a liquid crystal display device.

전기, 전자 기술의 발달에 따라 컴퓨터를 비롯한 전자 산업의 발전이 급속히 진행되고 있다. With the development of electrical and electronic technologies, the development of the electronics industry including computers is rapidly progressing.

이러한 전자 산업의 발달과 더불어 최근 그 사용이 급증하는 것이 디스플레이(display) 장치이다. Recently, with the development of the electronics industry, the use of display devices is rapidly increasing.

디스플레이 장치에는 CRT(Cathode Ray Tube), VFD(Vacuum Fluorescent Display), LCD(Liquid Crystal Display), LED(Light Emitting Diode), PDP(Plasma Display Panel)등이 사용되고 있으며, 그 중 동작 전압이 낮아 소비 전력이 적고 휴대용으로 쓰일 수 있는 등의 장점 때문에 가장 많이 사용되고 있는 것은 LCD(액정표시장치 : 이하, 'LCD'라 칭한다.)이다. Display devices include CRT (Cathode Ray Tube), VFD (Vacuum Fluorescent Display), LCD (Liquid Crystal Display), LED (Light Emitting Diode), PDP (Plasma Display Panel), etc. Because of its advantages such as being small and portable, the most commonly used is LCD (liquid crystal display device: hereinafter referred to as 'LCD').

이러한 LCD는 투명전극을 형성한 2장의 유리기판 사이에 액정을 주입한 것으로 외부로부터 전계를 가해 액정을 회전시켜 빛을 통과하게 하거나 통하지 않게 하는 방식으로 작동되는 것으로 전계를 인가하기 위한 전극을 구비하고 있다. The LCD injects liquid crystal between two glass substrates on which transparent electrodes are formed, and operates by applying an electric field from the outside to rotate the liquid crystal so that light passes or does not pass through. The LCD includes an electrode for applying an electric field. have.

이러한 LCD는 어느 하나의 상태 즉 안정상태를 유지하려는 속성이 있으므로 이미지가 동영상, 정지 영상에 상관없이 이미지를 보여주기 위해서는 일정한 시간 간격으로 계속해서 이미지를 리프레쉬(refresh)해 주어야 한다.Since such LCDs have a property of maintaining one state, that is, a stable state, the image must be refreshed continuously at regular time intervals in order to display an image regardless of a moving image or a still image.

그러나 이렇게 이미지를 리프레쉬 해주기 위해서는 전원이 공급되어야 하고 이렇게 지속적으로 전원을 공급함에 따라 에너지 효율이 떨어지는 문제가 있었다. 특히, 휴대용 전화와 같이 에너지 소모의 효율성이 매우 중요한 기기거나, 광고판, 혹은 미래의 전자 종이와 같은 장치의 경우에는 대부분 정지 영상을 보여줌에도 불구하고 계속하여 리프레쉬하여야 함으로 에너지 효율이 낮은 문제가 있다. However, in order to refresh the image, power must be supplied. As a result, energy efficiency decreases as the power is continuously supplied. In particular, in the case of a device such as a mobile phone, the efficiency of energy consumption is very important, or a device such as an advertising board, or future electronic paper has a problem of low energy efficiency because it must be continuously refreshed despite showing still images.

이러한 단점을 극복하기 위해 한번 상이 만들어지면 그것을 계속 유지할 수 있는 LCD의 개발을 목표로 연구가 진행되고 있으며, 이 방법들은 대부분이 액정이 서로 다른 두 방향으로 안정할 수 있게 액정의 배향, 액정을 제어하고 있다. To overcome these drawbacks, research is underway with the aim of developing an LCD that can maintain the image once it has been made. Most of these methods control the orientation of the liquid crystal and the liquid crystal so that the liquid crystal can be stabilized in two different directions. Doing.

이러한 에너지 효율을 높임과 동시에 안정상태를 유지하게 하기 위한 방법으로 배향막에 매우 미세한 구조를 갖는 배향 패턴(pattern)을 만들어 액정의 쌍안정성을 구현하는 기술이 있다. 이 기술을 이용할 경우 배향막의 대칭성(symmetric)을 이용하므로 온도, 배향막, 액정의 종류 등의 외부 조건에 관계없이 쌍안정성을 구현한 것이다.As a method for increasing energy efficiency and maintaining a stable state, there is a technology for realizing bi-stability of liquid crystals by forming an alignment pattern having a very fine structure in the alignment layer. When using this technique, since the symmetric of the alignment layer is used, bi-stability is realized regardless of external conditions such as temperature, alignment layer, and type of liquid crystal.

그러나 이 기술은 한 면에 두 방향으로 액정을 스위칭하기 위한 전극이 들어가서 기본적으로 여러 개의 화소를 구동하는데 어려운 점이 있다However, this technology is difficult to drive several pixels basically because of the electrode for switching the liquid crystal in two directions on one side

즉, 도 3에 도시한 바와 같이 같은 층에 네 개의 전극(1a, 1b, 2a, 2b)을 배열하고 이들 전극(1a, 1b, 2a, 2b)들 가운데 빈 공간에 액정의 픽셀(3)을 형성하여 구성되며, 서로 마주 보는 두 전극(1a, 1b, 2a, 2b) 사이에 전기장을 인가함으로서 전계가 발생되게 하여 픽셀(3)의 액정이 회전하여 빛을 선택적으로 통과시킴으로써 표시하고자 하는 것이 표현되게 하였다. That is, as shown in FIG. 3, four electrodes 1a, 1b, 2a, and 2b are arranged on the same layer, and the pixel 3 of the liquid crystal is placed in an empty space among the electrodes 1a, 1b, 2a, and 2b. The electric field is generated by applying an electric field between two electrodes 1a, 1b, 2a, and 2b facing each other to generate an electric field so that the liquid crystal of the pixel 3 rotates to selectively pass light. It was made.

이렇게 각각의 픽셀을 구동시키기 위한 전극이 한 면 위에 여러 개가 같이 만들어져서 구성됨으로써 구성이 복잡할 뿐만 아니라 독립적으로 각 화소를 구동시킴에 많은 어려움이 있었다. Thus, since the electrodes for driving each pixel are made of a plurality of electrodes on one side, the configuration is not only complicated, but there are many difficulties in driving each pixel independently.

본 발명은 위와 같은 문제점을 해결하기 위해 발명된 것으로, 한번에 여러 개의 화소를 구동시킬 수 있게 함으로써 에너지 효율을 향상시킨 액정 표시 장치의 전극을 제공함을 목적으로 한다. The present invention has been invented to solve the above problems, and an object of the present invention is to provide an electrode of a liquid crystal display device having improved energy efficiency by enabling driving of several pixels at once.

상기 목적을 달성하기 위한 본 발명에 따른 액정 표시 장치의 전극은 (A) 화소를 중심으로 양측에 각각 종방향으로 배열된 한 쌍의 종축 전극을 화소사이 거리의 간격으로 배열하여 구성된 종축 전극열과 ; (B) 상기 종측 전극과 수직을 이루고, 화소를 중심으로 양측에 각각 횡방향으로 배열된 한 쌍의 횡축 전극을 화소 사이 거리의 간격으로 배열하여 구성된 횡축 전극열로 구성됨을 특징으로 한다. The electrode of the liquid crystal display device according to the present invention for achieving the above object comprises: (A) a longitudinal axis of the electrode arranged by a pair of longitudinal axis arranged in the longitudinal direction on both sides with respect to the pixel; And (B) a horizontal electrode column which is perpendicular to the vertical electrode and is arranged by arranging a pair of horizontal axis electrodes arranged on both sides of the pixel in the horizontal direction at intervals between the pixels.

이하에서는 첨부된 도면을 참조하여 기술되는 바람직한 실시예를 통하여 본 발명을 당업자가 용이하게 이해하고 재현할 수 있도록 상세히 기술하기로 한다. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce.

도시한 바와 같이, 본 발명에 따른 액정 표시 장치의 한 기판의 전극은 종축 전극열(100)과 횡축 전극열(200)로 구성되어 있다. As shown in the drawing, an electrode of one substrate of the liquid crystal display according to the present invention includes a vertical electrode string 100 and a horizontal electrode string 200.

이들 각각의 전극열(100, 200)은 서로 직교되도록 배치되어 있으며, 서로 다른 전극열과 절연체(300)에 의해 전기적으로 분리되어 있다. Each of the electrode strings 100 and 200 is disposed to be orthogonal to each other and electrically separated from each other by the electrode string and the insulator 300.

상기 종축 전극열(100)은 픽셀(10)을 중심으로 양측에 각각 배치되어 있는 두 개의 종축 전극(110, 120)을 픽셀(10)들 사이의 거리만큼의 간격으로 배열하여 이루어진 것이고, 상기 횡축 전극열(200)은 픽셀(10)을 중심으로 전후에 각각 배치되어 있는 두 개의 횡축 전극(210, 220)을 픽셀(10)들 사이의 거리만큼의 간격으로 배열하여 이루어진 것이다. The vertical axis array 100 is formed by arranging two vertical axis electrodes 110 and 120 disposed on both sides of the pixel 10 at intervals corresponding to the distance between the pixels 10, and the horizontal axis The electrode column 200 is formed by arranging two horizontal electrodes 210 and 220 which are arranged before and after the pixel 10 at intervals corresponding to the distance between the pixels 10.

상기 각 전극들(110, 120, 210, 220)의 픽셀(10)과 대향되는 부분에는 도시한 바와 같이 호형으로 홈부(111, 121, 211, 221)가 형성되어 있다. Grooves 111, 121, 211, and 221 are formed in an arc shape on portions of the electrodes 110, 120, 210, and 220 that face the pixels 10.

상기와 같이 구성된 전극은 픽셀(10)을 중심으로 두 개의 전극에 각각 전압을 인가하여 줌에 의해 전극(110, 120, 210, 220)에 의해 싸여진 공간 내부에 전기장이 형성되어 픽셀이 작동을 하게 된다. The electrode configured as described above is applied with a voltage to each of the two electrodes around the pixel 10 so that an electric field is formed inside the space enclosed by the electrodes 110, 120, 210, and 220 to operate the pixel. do.

즉, 도 1에 도시한 바와 같이 스위칭을 하고자 하는 픽셀의 양측 및 전후에 배열된 전극들에 전압을 인가하면 전극들 사이에 전압차가 발생되며 이에 따라 픽셀 내부에는 대각선 방향의 전기장이 발생하여 픽셀이 작동하게 된다. 전기장의 방향을 바꾸어 주기 위해서는 두 전극(110, 120)들 중에 하나만 상대적인 값을 바꾸어 주면 된다.That is, as shown in FIG. 1, when a voltage is applied to electrodes arranged on both sides of the pixel to be switched and before and after the voltage, a voltage difference is generated between the electrodes. As a result, a diagonal electric field is generated inside the pixel, thereby providing a pixel. It works. In order to change the direction of the electric field, only one of the two electrodes 110 and 120 needs to change a relative value.

또한, DC 전압에 의한 부정적 효과를 감소시키기 위해서는 앞에서의 + 를 띄는 두 전극과 - 를 띄는 두 전극들의 극성을 동시에 바꾸어 줄 수 있도록 AC전원으로 구동을 하면 DC가 인가되었을 때와 같은 스위칭 작용을 하면서 DC에 의한 효과 를 줄일 수 있다. 전압이 공통으로 인가되는 부분을 바꾸어 줌으로써 화소의 위치를 바꾸어 줄 수 있다.In addition, in order to reduce the negative effect of DC voltage, when driven by AC power supply, it can switch the polarity of both the positive electrode and the negative electrode at the same time. The effect by DC can be reduced. The position of the pixel may be changed by changing a portion where voltage is commonly applied.

이상에서 상세히 기술한 바와 같이, 본 발명은 종횡으로 서로 엇갈리게 전극을 배열하고, 종측 전극과 횡측 전극이 서로 절연을 이루게 구성하여 한번에 여러 개의 화소를 구동시킬 수 있게 함으로서 에너지 효율을 높일 수 있는 효과가 있다.As described in detail above, the present invention has the effect of increasing the energy efficiency by arranging the electrodes alternately vertically and horizontally, and the vertical electrode and the horizontal electrode are insulated from each other to drive several pixels at once have.

본 발명은 첨부된 도면을 참조하여 바람직한 실시예를 중심으로 기술되었지만 당업자라면 이러한 기재로부터 본 발명의 범주를 벗어남이 없이 많은 다양한 자명한 변형이 가능하다는 것은 명백하다. 따라서 본 발명은 첨부된 특허청구범위의 문언에 의해서만 제한 해석될 수 있다. While the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various obvious modifications are possible without departing from the scope of the invention from this description. Accordingly, the invention can only be construed limited by the words of the appended claims.

Claims (3)

화소(10)를 중심으로 양측에 각각 종방향으로 배열된 한 쌍의 종축 전극(110, 120)을 화소사이의 거리의 간격으로 배열하여 구성된 종축 전극열(100)과 ; A vertical electrode column 100 configured by arranging a pair of vertical axis electrodes 110 and 120 arranged in the longitudinal direction on both sides of the pixel 10 at intervals between the pixels; 상기 종측 전극(110, 120)과 수직을 이루고, 화소(10)를 중심으로 양측에 각각 횡방향으로 배열된 한 쌍의 횡축 전극(210, 220)을 화소 사이의 거리의 간격으로 배열하여 구성된 횡축 전극열(100)로 구성됨을 특징으로 하는 액정 표시 장치의 전극.The horizontal axis which is perpendicular to the vertical electrodes 110 and 120 and is arranged by arranging a pair of horizontal axis electrodes 210 and 220 which are arranged on both sides of the pixel 10 in the horizontal direction, respectively, at intervals between the pixels. An electrode of a liquid crystal display, characterized in that consisting of an electrode string (100). 제 1 항에 있어서, The method of claim 1, 상기 종축 전극열(100)과 횡축 전극열(200) 사이에는 절연체(300)가 추가로 설치됨을 특징으로 하는 액정 표시 장치의 전극.The electrode of the liquid crystal display device, characterized in that an insulator (300) is further provided between the longitudinal electrode column (100) and the horizontal electrode column (200). 제 1 항에 있어서, The method of claim 1, 상기 종축 전극열(100)과 횡축 전극열(200)의 화소(10)와 대향되는 부분에는 호형 홈부(111, 121, 211, 221)가 형성됨을 특징으로 하는 액정 표시 장치의 전극.And an arc-shaped groove portion (111, 121, 211, 221) is formed in a portion of the vertical electrode column (100) and the horizontal electrode column (200) facing the pixel (10).
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