KR100508032B1 - Liquid crystal display - Google Patents

Liquid crystal display Download PDF

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KR100508032B1
KR100508032B1 KR1019970070604A KR19970070604A KR100508032B1 KR 100508032 B1 KR100508032 B1 KR 100508032B1 KR 1019970070604 A KR1019970070604 A KR 1019970070604A KR 19970070604 A KR19970070604 A KR 19970070604A KR 100508032 B1 KR100508032 B1 KR 100508032B1
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liquid crystal
crystal display
layer
plate
silicon
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KR1019970070604A
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Korean (ko)
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KR19990051313A (en
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마원석
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삼성전자주식회사
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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
    • G02F1/133553—Reflecting elements
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • 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
    • G02F1/136277—Active matrix addressed cells formed on a semiconductor substrate, e.g. of silicon
    • 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
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
    • G02F2201/123—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode pixel

Abstract

하부 절연 기판 위에 박막 트랜지스터가 형성되어 있고 그 위에 반사판이 형성되어 있으며 그 위에 규소층, Ⅲ-V 화합물 반도체층, 인층이 차례로 증착되어 있다. 규소증에 비정질이 아닌 미세 결정질 규소가 사용되는 경우에는 Ⅲ-V 화합물 반도체가 규소층 안에 도핑되어 형성될 수 있다. 상부 절연 기판에는 컬러 필터와 블랙 매트릭스가 형성되어 있고, 상판 위에는 편광판이 형성되어 있으며 상판과 하판 사이에는 액정이 주입되어 있다.A thin film transistor is formed on the lower insulating substrate, a reflecting plate is formed thereon, and a silicon layer, a III-V compound semiconductor layer, and a phosphorus layer are sequentially deposited thereon. When microcrystalline silicon, which is not amorphous, is used for siliconosis, the III-V compound semiconductor may be formed by being doped in the silicon layer. A color filter and a black matrix are formed on the upper insulating substrate, a polarizing plate is formed on the upper plate, and liquid crystal is injected between the upper plate and the lower plate.

이와 같이, 반사판 위에 저장해 놓은 에너지를 어두운 곳에서 발산하는 형광물질을 형성하여 빛이 없는 어두운 곳에서도 사용할 수 있는 반사형 액정 표시 장치를 제공할 수 있다.As described above, a reflective liquid crystal display device that can be used even in a dark place without light by forming a fluorescent material that emits energy stored in the dark in a dark place can be provided.

Description

액정 표시 장치Liquid crystal display

본 발명은 액정 표시 장치에 관한 것으로서, 더욱 상세하게는 반사형 액정표시 장치에 관한 것이다.The present invention relates to a liquid crystal display device, and more particularly, to a reflective liquid crystal display device.

반사형 액정 표시 장치는 백 라이트(back light)를 사용하는 다른 액정 표시장치와는 달리 빛을 반사하는 반사판을 사용하여 편광판을 통해 들어오는 빛을 반사하도록 하고 이 반사된 빛이 다시 상판의 편광판에 도달하는 방식을 사용하여 표시 기능을 수행한다.Reflective liquid crystal displays, unlike other liquid crystal displays that use back light, use a reflecting plate that reflects light, allowing it to reflect light coming through the polarizer, and the reflected light reaches the top of the polarizer again. To perform the display function.

그러면, 종래 기술에 따른 액정 표시 장치의 구조에 대하여 설명한다.Next, the structure of the liquid crystal display device according to the prior art will be described.

하부 절연 기판 위에 박막 트랜지스터가 형성되어 있고, 그 위에 보호막이 형성되어 있으며, 그 위에 반사판이 형성되어 있다. 상부 절연 기판에는 컬러 필터와 블랙 매트릭스가 형성되어 있으며, 상부 기판 위에는 편광판이 형성되어 있다.상판과 하판 사이에는 액정이 주입되어 있다.A thin film transistor is formed on the lower insulating substrate, a protective film is formed thereon, and a reflecting plate is formed thereon. A color filter and a black matrix are formed on the upper insulating substrate, and a polarizing plate is formed on the upper substrate. Liquid crystal is injected between the upper and lower plates.

이러한 구조를 갖는 반사형 액정 표시 장치는 백 라이트를 사용하지 않기 때문에 소비 전력이 적게 든다는 장점이 있으나, 대비비가 떨어지고 빛이 충분히 들어오지 않는 어두운 환경에서는 액정 표시 장치의 표시 기능을 수행할 수 없는 단점이 있다.Reflective liquid crystal display having such a structure has the advantage of low power consumption because it does not use a backlight, but the disadvantage is that the display function of the liquid crystal display cannot be performed in a dark environment where the contrast ratio is low and the light does not sufficiently enter. have.

본 발명의 과제는 어두운 환경에서도 사용 가능한 반사형 액정 표시 장치를 제공하는 것이다.An object of the present invention is to provide a reflective liquid crystal display device that can be used even in a dark environment.

이러한 과제를 해결하기 위하여 본 발명에서는 액정 표시 장치의 화소 전극위에 규소층을 형성하고 GaP(Ga:gallium;P: phosphorus)와 같은 Ⅲ-V족 화합물 반도체 물질을 형성하고 그 위에 인(P)을 형성하는 방법으로 형광 물질을 형성한다In order to solve this problem, the present invention forms a silicon layer on the pixel electrode of the liquid crystal display, forms a III-V compound semiconductor material such as GaP (Ga: gallium; P: phosphorus), and forms phosphorus (P) thereon. How to form a fluorescent material

이렇게 함으로써, 밝은 곳에서 에너지를 저장해 놓은 형광 물질에서 발산되는 빛으로 인해 어두운 곳에서도 시청 가능한 반사형 액정 표시 장치를 제공할 수 있다.By doing so, it is possible to provide a reflective liquid crystal display device that can be viewed in a dark place due to light emitted from a fluorescent material storing energy in a bright place.

그러면, 도면을 참고로 하여 본 발명의 실시예에 따른 액정 표시 장치의 구조에 대하여 상세히 설명한다.Next, the structure of the liquid crystal display according to the exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 실시예에 따른 액정 표시 장치의 단면도이다.1 is a cross-sectional view of a liquid crystal display according to an exemplary embodiment of the present invention.

하부의 절연 기판(1) 위에 박막 트랜지스터(2)가 형성되어 있고 그 위에 보호막(3)이 형성되어 있다. 그 위에 액정을 포함하여 형성한 반사판(4)이 형성되어 있다. 그 위에 규소, GaP와 같은 Ⅲ-V족 화합물로 이루어진 반도체 및 인으로 구성된 형광 물질(5)이 형성되어 있는데, 이 형광 물질(5)은 밝은 곳에서 에너지를 저장하고 어두운 곳에서 저장한 에너지를 빛으로 발산하여 반사형 액정 표시 장치가 어두운 곳에서도 사용 가능할 수 있도록 하는 역할을 한다. 이 형광 물질(5)에 비정질 규소가 사용되는 경우에는 규소층이 맨 아래층에 형성되고 그 위에 Ⅲ-V족화합물로 이루어진 반도체층이 증착되며 그 위에 인이 증착되는데, 미세 결정질 규소가 사용되는 경우에는 Ⅲ-V족 화합물로 이루어진 반도체층이 규소층 사이에 도핑되어 형성될 수 있다. 상부의 절연 기판(8) 위에는 컬러 필터(7)와 블랙 매트릭스(10)가 형성되어 있다. 상부의 절연 기판(8)의 다른 면에는 편광판(9)이 형성되어 있고 하판(1)과 상판(8)의 사이에는 액정(6)이 형성되어 있다.The thin film transistor 2 is formed on the lower insulating substrate 1, and the protective film 3 is formed on it. The reflecting plate 4 formed including the liquid crystal is formed on it. On top of that is formed a fluorescent substance (5) consisting of a semiconductor composed of a III-V group compound such as silicon, GaP, and phosphorus. The fluorescent substance (5) stores energy in a bright place and energy stored in a dark place. It emits light so that the reflective liquid crystal display can be used even in the dark. In the case where amorphous silicon is used for the fluorescent material 5, a silicon layer is formed on the bottom layer, and a semiconductor layer composed of group III-V compounds is deposited thereon, and phosphorus is deposited thereon, where fine crystalline silicon is used. In the semiconductor layer consisting of a group III-V compound may be formed by doping between the silicon layer. The color filter 7 and the black matrix 10 are formed on the upper insulating substrate 8. On the other side of the upper insulating substrate 8, a polarizing plate 9 is formed, and a liquid crystal 6 is formed between the lower plate 1 and the upper plate 8.

위에서 언급한 바와 같이, 인 등으로 이루어진 형광 물질을 반사판 위에 형성하고 이 형광 물질이 밝은 곳에서 저장해 놓은 에너지를 어두운 곳에서 빛으로 발산하도록 하여 빛이 없는 어두운 곳에서도 반사형 액정 표시 장치를 사용할 수 있다.As mentioned above, it is possible to use a reflective liquid crystal display device in a dark place without light by forming a phosphor made of phosphorous on a reflector and dissipating the energy stored in the bright place to light in a dark place. have.

도 1은 본 발명의 실시예에 따른 반사형 액정 표시 장치의 단면도이다.1 is a cross-sectional view of a reflective liquid crystal display device according to an exemplary embodiment of the present invention.

Claims (3)

기판 위에 박막 트랜지스터, 반사판 및 화소 전극을 포함하며,A thin film transistor, a reflector and a pixel electrode on the substrate, 상기 화소 전극 위에 규소층, Ⅲ-Ⅴ족 화합물 반도체층, 인층으로 이루어진형광 물질을 포함하는 액정 표시 장치.And a fluorescent material including a silicon layer, a III-V compound semiconductor layer, and a phosphorus layer on the pixel electrode. 제1항에서,In claim 1, 상기 규소층은 비정질 규소 또는 미세 결정질 규소로 형성된 액정 표시 장치.The silicon layer is formed of amorphous silicon or microcrystalline silicon. 제1항에서,In claim 1, 상기 반도체층은 GaP로 형성된 액정 표시 장치.The semiconductor layer is formed of GaP.
KR1019970070604A 1997-12-19 1997-12-19 Liquid crystal display KR100508032B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05173122A (en) * 1991-12-25 1993-07-13 Sharp Corp Reflection type color liquid crystal display device
JPH07104267A (en) * 1993-10-05 1995-04-21 Casio Comput Co Ltd Active matrix liquid crystal display element
KR970002416A (en) * 1995-06-30 1997-01-24 가시오 가즈오 Color liquid crystal display element
JPH0926573A (en) * 1995-07-11 1997-01-28 Fuji Xerox Co Ltd Liquid crystal display device
JPH0961854A (en) * 1995-08-29 1997-03-07 Casio Comput Co Ltd Color liquid crystal display element

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05173122A (en) * 1991-12-25 1993-07-13 Sharp Corp Reflection type color liquid crystal display device
JPH07104267A (en) * 1993-10-05 1995-04-21 Casio Comput Co Ltd Active matrix liquid crystal display element
KR970002416A (en) * 1995-06-30 1997-01-24 가시오 가즈오 Color liquid crystal display element
JPH0926573A (en) * 1995-07-11 1997-01-28 Fuji Xerox Co Ltd Liquid crystal display device
JPH0961854A (en) * 1995-08-29 1997-03-07 Casio Comput Co Ltd Color liquid crystal display element

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