KR100730098B1 - Color liquid crystal display - Google Patents

Color liquid crystal display Download PDF

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KR100730098B1
KR100730098B1 KR1020000054621A KR20000054621A KR100730098B1 KR 100730098 B1 KR100730098 B1 KR 100730098B1 KR 1020000054621 A KR1020000054621 A KR 1020000054621A KR 20000054621 A KR20000054621 A KR 20000054621A KR 100730098 B1 KR100730098 B1 KR 100730098B1
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liquid crystal
backlight
crystal cell
crystal display
display device
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KR20020021890A (en
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김태승
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삼성에스디아이 주식회사
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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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • 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
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/80—Constructional details
    • H10K30/81—Electrodes
    • H10K30/82—Transparent electrodes, e.g. indium tin oxide [ITO] electrodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Electromagnetism (AREA)
  • Spectroscopy & Molecular Physics (AREA)

Abstract

칼라액정표시소자를 개시한다. 본 발명은 서로 대향 배치된 기판의 내측에 각각 투명전극 및 배향막이 적층 형성되는 동시에 배향막 사이에 액정이 주입되어 밀봉된 구조로 형성되는 액정셀과, 백라이트가 결합된 통상적인 칼라 액정표시소자에 관한 것으로, 액정셀과 백라이트 사이에 이송수단에 의해 선택적으로 설치 및 제거가 가능한 반사판을 형성하는 것으로, 주변광의 밝기에 따라 선택적으로 투과, 반사 방식을 결정함으로써 백라이트만을 사용할 경우 발생되는 전력 소비량을 줄이며 액정표시소자의 사용 수명을 연장하는 효과가 있다.A color liquid crystal display device is disclosed. The present invention relates to a liquid crystal cell in which a transparent electrode and an alignment layer are respectively stacked on a substrate disposed opposite to each other, and a liquid crystal cell is formed in a sealed structure by injecting liquid crystal between the alignment layers, and a conventional color liquid crystal display device in which a backlight is combined. By forming a reflective plate that can be selectively installed and removed by the transfer means between the liquid crystal cell and the backlight, and by selectively determining the transmission and reflection method according to the brightness of the ambient light to reduce the power consumption generated when using the backlight alone There is an effect of extending the service life of the display element.

칼라 액정표시소자, 백라이트, 반사판Color LCD, Backlight, Reflector

Description

칼라 액정표시소자{Color liquid crystal display}Color liquid crystal display

도 1a는 본 발명의 일 실시예에 따른 반사판이 제거된 상태의 칼라 액정표시소자를 나타낸 단면도,1A is a cross-sectional view illustrating a color liquid crystal display device with a reflective plate removed according to an embodiment of the present invention;

도 1b는 본 발명의 일 실시예에 따른 반사판이 설치된 상태의 칼라 액정표시소자를 나타낸 단면도,1B is a cross-sectional view showing a color liquid crystal display device in a state where a reflector is installed according to an embodiment of the present invention;

도 2a는 본 발명을 적용한 휴대폰의 사시도,2a is a perspective view of a mobile phone to which the present invention is applied;

도 2b는 휴대폰의 내부에 장착된 반사판의 상태를 나타낸 개략도,Figure 2b is a schematic diagram showing the state of the reflector mounted inside the mobile phone,

도 3은 종래의 백라이트방식의 칼라 액정표시소자 단면도이다.3 is a cross-sectional view of a conventional color liquid crystal display device.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

11A,11B : 유리기판 13 : 액정셀11A, 11B: glass substrate 13: liquid crystal cell

15 : 액정 17A,17B : 편광판15: liquid crystal 17A, 17B: polarizing plate

19A,19B,19C : 칼라필터(R,G,B) 21A,21B : 투명전극19A, 19B, 19C: Color filter (R, G, B) 21A, 21B: Transparent electrode

23A,23B : 배향막 25 : 백라이트(Backlight)23A, 23B: Alignment layer 25: Backlight

27 : 스위치(Switch) 29 : 반사판27: switch 29: reflector

31 : 노브(Knob) 33 : 가이드 홈31 Knob 33 Guide groove

본 발명은 칼라 액정표시소자에 관한 것으로 특히, 백라이트방식에 있어서 주변광도의 세기에 따라 반사판을 설치하거나 제거함으로써 주변광과 백라이트(Backlight)를 선택적으로 이용하여 빛의 이용효율을 높이고 전력의 소비를 줄이며 수명을 연장할 수 있는 칼라 액정표시소자에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color liquid crystal display device. In particular, in the backlight method, by using the ambient light and the backlight selectively by installing or removing the reflector according to the intensity of the ambient light, the light utilization efficiency is increased and power consumption is increased. The present invention relates to a color liquid crystal display device which can reduce life and extend life.

통상적으로, 칼라 액정표시소자(Liquid Crystal Display)는 저구동전압 및 저소비전력, 액정패널의 평탄성 등에 의해 핸드폰, 노트북 컴퓨터등에 다양하게 응용되고 있는 평판 디스플레이로, 배열방향의 변화에 따라 광의 반사특성이 변화되는 액정의 유전이방성에 의해 소원의 문자, 숫자 등을 표시한다. 이러한 액정표시소자에는 백라이트를 채용하여 빛을 국부적으로 투과시킴으로써 문자, 숫자 등을 표시하는 투과형(Transmissive Type)과, 후면에 필름으로 된 반사기판을 채용하여 전방의 입사광을 반사하는 반사형(Reflective Type)이 있다.In general, a liquid crystal display (LCD) is a flat panel display that is variously applied to mobile phones, notebook computers, etc. due to low driving voltage, low power consumption, flatness of liquid crystal panel, and the like. The letter, number, etc. of a wish are displayed by the dielectric anisotropy of the liquid crystal which changes. The liquid crystal display device uses a backlight to transmit light locally to display letters, numbers, and the like, and a reflective substrate made of a film on the rear side reflects incident light from the front. There is.

도 3은 종래의 백라이트방식의 칼라 액정표시소자의 판상 구조도이다. 칼라 액정표시소자는 기본적으로, 유리나 플라스틱 재질의 서로 대향 배치되는 상측 기판(11A)과 하측 기판(11B)이 하나의 액정셀(13)을 구성하고, 그 내부에는 액정(15)이 주입되어 있다. 상기 액정(15)은 전계의 트위스트각이 변동되어 화소를 표시하도록 STN 또는 DSTN 같은 구조의 액정으로 밀봉되어 있다.3 is a plate structure diagram of a conventional color liquid crystal display device. In the color liquid crystal display element, the upper substrate 11A and the lower substrate 11B, which are basically arranged opposite to each other, made of glass or plastic material, constitute one liquid crystal cell 13, and the liquid crystal 15 is injected therein. . The liquid crystal 15 is sealed with a liquid crystal having a structure such as STN or DSTN so that the twist angle of the electric field varies to display the pixel.

액정셀(13)을 구성하는 상기 상측 기판(11A)의 상부와 하측 기판(11B)의 하부에는 편광판(17A,17B)이 적층된다. 액정셀(13)을 구성하는 상측 기판(11A)의 저면에는 적(R), 녹(G), 청(B)의 칼라필터(19A,19B,19C), 투명전극(21A,21B), 배향막(23A,23B)이 순차적으로 적층되며, 이렇게 구성된 액정셀(13)의 하부 편광판(17B) 뒷면에는 광원으로 백라이트(25)가 갖추어진다.Polarizing plates 17A and 17B are stacked on an upper portion of the upper substrate 11A and a lower portion of the lower substrate 11B constituting the liquid crystal cell 13. On the bottom surface of the upper substrate 11A constituting the liquid crystal cell 13, red (R), green (G), and blue (B) color filters (19A, 19B, 19C), transparent electrodes (21A, 21B), and alignment films 23A and 23B are sequentially stacked, and the backlight 25 is provided as a light source on the rear surface of the lower polarizing plate 17B of the liquid crystal cell 13 configured as described above.

이러한 백라이트방식의 칼라 액정표시소자는 백라이트(25)에서 조사되는 빛이 편광판(17B)을 거쳐 액정(15)층을 통과되게 하고, 상기 액정(15)층은 배향성을 이용하여 백라이트(25)의 빛을 통과시키거나 통과되지 않게 스위칭하여 주는 작용을 함으로써, 상기 백라이트(25)의 빛이 정해진 표시 형태를 이루게 하며, 액정(15)층을 통과한 빛은 투명전극(21A)를 통과하여 칼라필터(19A,19B,19C)를 거쳐 상부 기판(11A)까지 투과되어 편광판(17A)에 투영됨으로써 외부의 관측자에게 화소를 표시하게 된다. The backlight type color liquid crystal display device allows the light irradiated from the backlight 25 to pass through the liquid crystal 15 layer through the polarizing plate 17B, and the liquid crystal 15 layer uses the alignment property of the backlight 25. By switching the light to pass through or not to pass, the light of the backlight 25 forms a predetermined display form, and the light passing through the liquid crystal layer 15 passes through the transparent electrode 21A to pass through the color filter By passing through 19A, 19B, and 19C to the upper substrate 11A and projecting onto the polarizing plate 17A, the pixel is displayed to an external observer.

그러나 상기한 백라이트 방식의 칼라 액정표시장치는 주변광이 밝은 곳이나 자연광이 밝은 낮에도 백라이트를 사용함으로 인해서 불필요한 전력의 낭비와 수명단축을 가져오는 단점이 있었다.However, the backlight-type color liquid crystal display device has disadvantages of unnecessary waste of power and shortening of life due to the use of a backlight even in a bright ambient light or a bright daylight.

이와 같은 종래의 문제점을 해결하기 위해서, 본 발명은 백라이트만으로 구성되는 광이용 방식의 구조를 개선하여 주변광의 밝기에 따라 선택적으로 주변광과 백라이트를 광원으로 이용함으로써 전력의 소비량을 낮출 수 있는 칼라 액정표시소자를 제공하는 것을 목적으로 한다.In order to solve such a conventional problem, the present invention improves the structure of the light utilization method composed only of the backlight, and according to the brightness of the ambient light by selectively using the ambient light and the backlight as a light source to reduce the power consumption of color liquid crystal It is an object to provide a display element.

상기와 같은 문제점을 해결하기 위하여 본 발명의 일 측면에 따른 칼라 액정표시소자는, 서로 대향 배치된 기판의 내측에 각각 투명전극 및 배향막이 적층형성 되는 동시에 배향막 사이에 액정이 주입되어 밀봉된 구조로 형성되는 액정셀과, 백라이트가 결합된 통상적인 칼라 액정표시소자에 적용 되는데, 상기 액정셀과 백라이트 사이에 이송수단에 의해 선택적으로 설치 및 제거가 가능한 반사판을 형성하는 것을 특징으로 한다.In order to solve the above problems, the color liquid crystal display device according to an aspect of the present invention has a structure in which a transparent electrode and an alignment layer are formed on the inside of a substrate disposed to face each other, and liquid crystal is injected between the alignment layers and sealed. The liquid crystal cell is formed, and is applied to a conventional color liquid crystal display device combined with a backlight, characterized in that to form a reflective plate that can be selectively installed and removed by the transfer means between the liquid crystal cell and the backlight.

상기 이송수단은 반사판의 일측면에 부착되며, 액정셀의 상측면과 하측면의 범위 또는 좌측면과 우측면의 범위를 가이드홈을 따라 슬라이딩이 가능한 노브(Knob)인 것이 바람직하다.The conveying means is attached to one side of the reflecting plate, it is preferable that the knob (Knob) that can be slid along the guide groove in the range of the upper and lower surfaces of the liquid crystal cell or the range of the left and right surfaces.

또한, 상기 백라이트에는 전원의 공급을 제어 하기 위해 백라이트와 전원 사이에 스위치가 더 장착되는 것이 바람직하다. In addition, the backlight is preferably further equipped with a switch between the backlight and the power to control the supply of power.

이하 본 발명에 따른 바람직한 실시예를 첨부된 도면에 의거하여 상세히 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도면 설명에 있어 같은 구성요소, 같은 재질에 대해서는 종래 기술 도면의 참조 번호와 동일한 참조 번호를 사용하여 설명하기로 한다.In the description of the drawings, the same components and the same materials will be described using the same reference numerals as in the prior art drawings.

도 1a 및 도 1b는 본 발명에 관련된 칼라 액정표시소자의 단면도로서 유리나 플라스틱 재질의 서로 대향 배치되는 상측 기판(11A)과 하측 기판(11B)이 하나의 액정셀(13)을 구성하고, 그 내부에는 액정(15)이 주입되어 밀봉된다.1A and 1B are cross-sectional views of a color liquid crystal display device according to the present invention, in which an upper substrate 11A and a lower substrate 11B disposed of glass or plastic facing each other constitute one liquid crystal cell 13, and an inside thereof. The liquid crystal 15 is injected and sealed in it.

상측 기판(11A)의 상부와 하측 기판(11B)의 하부에는 편광판(17A,17B)이 적층되어 액정셀(13)을 구성한다. 액정셀(13)을 구성하는 상측 기판(11A)의 저면에는 적(R), 녹(G), 청(B)의 칼라필터(19A,19,19C), 투명전극(21A,21B), 배향막(23A,23B)이 순차적으로 적층되며, 하부 편광판(17B)의 뒷면에는 광원으로 백라이트(25)가 위치하게 되며 액정셀(13)의 하부 편광판(17B)과 백라이트(25) 사이에 반사판(29)을 형성하게 된다.Polarizing plates 17A and 17B are stacked on the upper substrate 11A and the lower substrate 11B to form the liquid crystal cell 13. On the bottom surface of the upper substrate 11A constituting the liquid crystal cell 13, red (R), green (G), and blue (B) color filters (19A, 19, 19C), transparent electrodes (21A, 21B), and alignment layers 23A and 23B are sequentially stacked, and the backlight 25 is positioned as a light source on the rear surface of the lower polarizer 17B, and the reflector 29 is disposed between the lower polarizer 17B and the backlight 25 of the liquid crystal cell 13. ).

또한, 상기 백라이트(25)를 온(on)/오프(off) 시키기 위해 전원과 백라이트(25) 사이에 스위치(27)를 장착시킨다.In addition, a switch 27 is mounted between the power supply and the backlight 25 to turn on / off the backlight 25.

도 1a는 본 발명의 일 실시예에 따른 반사판이 제거된 상태의 칼라 액정표시소자를 나타낸 단면도이며, 도 1b는 본 발명의 일 실시예에 따른 반사판이 설치된 상태의 칼라 액정표시소자를 나타낸 단면도이다.1A is a cross-sectional view illustrating a color liquid crystal display device in a state where a reflector is removed according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view illustrating a color liquid crystal display device in a state where a reflector is installed according to an embodiment of the present invention. .

도 1a에서 보여지는 것처럼 주변광이 어두울 때는 반사판(29)을 슬라이딩시켜 액정셀(13)에서 제거하고 백라이트(25)를 광원으로 사용하게된다.As shown in FIG. 1A, when the ambient light is dark, the reflective plate 29 is slid to be removed from the liquid crystal cell 13, and the backlight 25 is used as a light source.

이때, 도 1a에 도시된 바와 같이 스위치(27)를 온(on)시켜 상기 백라이트(25)에 전원을 공급한다.In this case, as illustrated in FIG. 1A, the switch 27 is turned on to supply power to the backlight 25.

이에 따라, 백라이트(25)에서 조사되는 빛이 편광판(17A)을 거쳐 액정(15)층을 통과하고, 상기 액정(15)층은 배향성을 이용하여 백라이트(25)의 빛을 통과시키거나 통과되지 않게 스위칭하여 주는 작용을 함으로써, 상기 백라이트(25)의 빛이 정해진 표시 형태를 이루게 되며, 액정(15)층을 통과한 빛은 투명전극(21A)를 통과하여 칼라필터(19A,19B,19C)를 거쳐 상부 기판(11A)까지 투과되어 편광판(17A)에 투영됨으로써 외부의 관측자에게 화소를 표시한다.Accordingly, the light irradiated from the backlight 25 passes through the liquid crystal 15 layer through the polarizing plate 17A, and the liquid crystal 15 layer does not pass or pass the light of the backlight 25 using alignment. By switching the light, the light of the backlight 25 forms a predetermined display form, and the light passing through the liquid crystal 15 layer passes through the transparent electrode 21A to pass through the color filters 19A, 19B, and 19C. The light is transmitted through the upper substrate 11A and is projected onto the polarizing plate 17A to display the pixel to an external observer.

주변광이 밝을 때는 도 1b에서 보여지는 것처럼 반사판(29)을 설치하여 주변광을 입사광으로 하여 입사광을 반사판(29)에 의해 반사하도록 한다.When the ambient light is bright, as shown in FIG. 1B, a reflection plate 29 is provided to reflect the incident light by the reflection plate 29 using the ambient light as incident light.

광의 투과과정은 외부 입사광이 편광판(17A)을 통해 입사되면서 원편광에서 직선편광으로 변화되고, 이 직선편광은 상부기판(11A), 칼라필터(19A,19B,19C), 투명전극(21A)을 차례로 거쳐 액정(15)층을 투과한 다음 타원편광이 되어 투명전극(21B) 및 하부기판(11B)을 순차적으로 투과해 반사판(29)에 의해 반사된다. 이 반사판(29)에서 반사된 반사광은 전술한 바와 같은 과정의 역순으로 상부기판(11A)까지 투과되어 편광판(17A)에 투영됨으로써 외부의 관측자에게 화소를 표시하게 된다.In the transmission process of light, external incident light enters through the polarizing plate 17A and changes from circularly polarized light to linearly polarized light. The linearly polarized light is transferred to the upper substrate 11A, the color filters 19A, 19B, and 19C, and the transparent electrode 21A. After passing through the liquid crystal 15 layer in turn, and becomes elliptical polarization, the transparent electrode 21B and the lower substrate 11B are sequentially transmitted and reflected by the reflecting plate 29. The reflected light reflected by the reflecting plate 29 is transmitted to the upper substrate 11A in the reverse order of the above-described process, and is projected onto the polarizing plate 17A to display pixels to an external observer.

이때, 도 2b에 도시된 바와 같이 스위치(27)를 오프(off)시켜 백라이트(25)로의 전원 공급을 차단한다.In this case, as shown in FIG. 2B, the switch 27 is turned off to cut off the power supply to the backlight 25.

도 2a는 본 발명을 적용한 휴대폰의 사시도이며, 도 2b는 휴대폰의 내부에 장착된 반사판의 상태를 나타낸 계략도이다.Figure 2a is a perspective view of a mobile phone to which the present invention is applied, Figure 2b is a schematic diagram showing the state of the reflector mounted on the inside of the mobile phone.

반사판(29)의 하측면에 노브(31)가 부착되고 액정셀(13)의 하측면까지 가이드 홈(33)을 따라 슬라이딩이 가능한 구조로 한다.The knob 31 is attached to the lower side of the reflecting plate 29 and is configured to slide along the guide groove 33 to the lower side of the liquid crystal cell 13.

주변광이 밝을 때는 슬라이딩에 의한 개폐방식으로 반사판(29)에 연결된 노브(31)를 밀어 올려 반사판(29)을 설치하며 주변광이 어두울 때는 노브(31)를 아래로 내려 반사판(29)대신에 백라이트를 사용할 수 있도록 구성한다.When the ambient light is bright, the knob 31 connected to the reflector 29 is pushed up and installed by sliding to install the reflector 29. When the ambient light is dark, the knob 31 is lowered instead of the reflector 29. Configure the backlight for use.

본 적용예는 핸드폰에 적용한 일 실시예이며, 각종 디스플레이 소자에 적용될 수 있다.This application example is an embodiment applied to a mobile phone, it can be applied to various display elements.

상기한 바와 같이 백라이트 방식의 칼라 액정표시장치에 반사판(29)을 형성시켜 주변광이 밝을 때는 백라이트(25)를 오프(off)시키고 반사판(29)을 설치하여 주변광을 이용할 수 있도록 하며, 주변광이 어두울 때는 백라이트(25)를 온(on)시 켜 액정표시소자의 백라이트 구동시 소비되어지는 전력을 줄이며 기기의 사용 수명을 연장할 수 있다.As described above, the reflection plate 29 is formed in the backlight type color liquid crystal display device so that when the ambient light is bright, the backlight 25 is turned off and the reflection plate 29 is installed so that the ambient light can be used. When the light is dark, the backlight 25 is turned on to reduce power consumed when driving the backlight of the liquid crystal display and to extend the service life of the device.

이상에서 설명한 바와 같이 본 발명은 기존의 백라이트 방식의 칼라 액정표시소자에서 액정표시소자와 백라이트 사이에 반사판을 형성하여 주변광의 밝기에 따라 선택적로 반사판이나 백라이트를 사용할 수 있도록 함으로써 소비되어지는 전력량을 줄이며, 아울러 기기의 수명을 연장하는 효과가 있다.As described above, the present invention reduces the amount of power consumed by forming a reflector between the liquid crystal display and the backlight in the conventional backlight type color liquid crystal display so that the reflector or the backlight can be selectively used according to the brightness of the ambient light. In addition, it has the effect of extending the life of the device.

본 발명은 상술한 실시예에 한정되지 않으며, 본 발명의 기술적 사상 내에서 당분야에서 통상의 지식을 가진 자에 의하여 많은 변형이 가능함은 명백하다.The present invention is not limited to the above-described embodiment, and it is apparent that many modifications are possible by those skilled in the art within the technical spirit of the present invention.

Claims (3)

서로 대향되게 배치된 기판과, 상기 기판의 내측에 적층형성된 투명전극과, 배향막과, 상기 배향막 사이에 주입된 액정과, 상기 기판의 상하부에 배치된 편광판을 구비한 액정셀;과,A liquid crystal cell having a substrate disposed to face each other, a transparent electrode laminated on the inside of the substrate, an alignment layer, a liquid crystal injected between the alignment layer, and a polarizing plate disposed above and below the substrate; 상기 액정셀에 결합된 백라이트;와,A backlight coupled to the liquid crystal cell; 상기 액정셀의 편광판과, 백라이트 사이에 배치되며, 이송수단에 의하여 선택적으로 설치 및 제거가능한 반사판;를 포함하고,And a reflective plate disposed between the polarizing plate of the liquid crystal cell and the backlight and selectively installed and removed by a transfer means. 상기 이송수단은 반사판의 일측면에 결합되며, 액정셀의 상측면과 하측면의 범위 또는 좌측면과 우측면의 범위로 가이드홈을 따라서 슬라이딩하여서 상기 반사판을 상기 액정셀 쪽으로 이동시키는 노브인 것을 특징으로 하는 칼라 액정 표시소자.The conveying means is coupled to one side of the reflecting plate, characterized in that the knob for moving the reflecting plate toward the liquid crystal cell by sliding along the guide groove in the upper side and the lower side of the liquid crystal cell or the range of the left side and the right side. Color liquid crystal display device. 삭제delete 제1항에 있어서, 상기 백라이트에는 전원의 공급을 제어 하기 위해 백라이트와 전원 사이에 스위치가 더 장착되는 것을 특징으로 하는 칼라 액정표시소자.The color liquid crystal display of claim 1, wherein a switch is further mounted between the backlight and the power source to control the supply of power.
KR1020000054621A 2000-09-18 2000-09-18 Color liquid crystal display KR100730098B1 (en)

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* Cited by examiner, † Cited by third party
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JPH0580329A (en) * 1991-09-24 1993-04-02 Matsushita Electric Ind Co Ltd Liquid crystal display device
JPH05216028A (en) * 1992-01-31 1993-08-27 Sharp Corp Liquid crystal display device with reflectance reducing protection plate
JPH08154221A (en) * 1994-11-28 1996-06-11 Matsushita Electric Ind Co Ltd Video camera having liquid crystal display device
JP2000214462A (en) * 1999-01-27 2000-08-04 Advanced Display Inc Liquid crystal display device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0580329A (en) * 1991-09-24 1993-04-02 Matsushita Electric Ind Co Ltd Liquid crystal display device
JPH05216028A (en) * 1992-01-31 1993-08-27 Sharp Corp Liquid crystal display device with reflectance reducing protection plate
JPH08154221A (en) * 1994-11-28 1996-06-11 Matsushita Electric Ind Co Ltd Video camera having liquid crystal display device
JP2000214462A (en) * 1999-01-27 2000-08-04 Advanced Display Inc Liquid crystal display device

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