KR100258030B1 - Active dynamic display - Google Patents

Active dynamic display Download PDF

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KR100258030B1
KR100258030B1 KR1019970079093A KR19970079093A KR100258030B1 KR 100258030 B1 KR100258030 B1 KR 100258030B1 KR 1019970079093 A KR1019970079093 A KR 1019970079093A KR 19970079093 A KR19970079093 A KR 19970079093A KR 100258030 B1 KR100258030 B1 KR 100258030B1
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South Korea
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light
electric field
shutter layer
backlight
display device
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KR1019970079093A
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Korean (ko)
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KR19990058908A (en
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박도형
허경재
정좌영
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손욱
삼성에스디아이주식회사
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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
    • G02F1/1336—Illuminating devices
    • 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
    • G02F1/133514—Colour filters
    • 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
    • G02F1/133555—Transflectors
    • 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
    • G02F1/133528—Polarisers

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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)
  • Liquid Crystal (AREA)

Abstract

PURPOSE: A light emitting display device is to accomplish a reduced cost and a slim product and to increase a light emitting efficiency and a luminance of screen without loss of a backlight illumination. CONSTITUTION: A light shutter layer(10) adjacent to a backlight illumination(8) is constructed such that an electro-chromic material(16) which transmits light when an electric field is applied to the material is filled between a pair of oppositely arranged glass substrates. A transparent electrode(18,20) is deposited on an inside opposite surface of the glass substrate. A front glass plate(4) having a fluorescent film on its inside surface is mounted in front of the light shutter layer with a distance. The light irradiated from the backlight illumination is directly incident to the light shutter layer. When the electric field is not applied between the transparent electrodes, the material received in the light shutter layer overlaps to completely block the light by a diffused reflection so that the light does not reach the fluorescent film of the front glass plate. When the electric field is applied, an image of the material shifts in an incident direction of the backlight to pass the light without any disturbance.

Description

능동형 발광표시소자Active light emitting display device

본 발명은 능동형 발광표시소자에 관한 것으로서, 보다 상세하게는 전계를 띠었을 때 그것을 전달하는 매개체의 특성을 이용하여 편광판을 생략할 수 있게 되어 있는 능동형 발광표시소자에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an active light emitting display device, and more particularly, to an active light emitting display device in which a polarizing plate can be omitted by using a characteristic of a medium that delivers an electric field.

칼라 액정표시소자는 백라이트에서 조사된 빛이 편광자를 거쳐 액정층을 통과되게 하고, 상기 액정층은 배향성을 이용하여 상기 백라이트의 빛을 통과시키거나 통과되지 않게 차단하며, 그 액정층을 투과하여 나오는 빛이 대응되는 칼라필터를 거치면서, 전면유리를 통해 화상을 구현하는 구성으로 되어 있다.The color liquid crystal display device allows the light irradiated from the backlight to pass through the polarizer and passes through the liquid crystal layer, and the liquid crystal layer blocks or prevents the light from passing through the liquid crystal layer through the liquid crystal layer by using alignment. While passing through the color filter corresponding to the light, it is configured to implement the image through the windshield.

상기와 같은 칼라 액정표시소자에서 칼라 필터는 흡수 안료를 포함하고 있기 때문에, 여기를 통과하는 광의 상당량이 감쇠되고, 그 결과로 색 순도 등이 저하되는 단점이 있다.In the color liquid crystal display device as described above, since the color filter includes an absorbing pigment, a considerable amount of light passing therethrough is attenuated, and as a result, color purity or the like is deteriorated.

이러한 점을 고려하여, 최근에는 도 2에 표시된 바와 같이 액정표시소자(2)의 전면에 프론트 글라스판(4)에 형성된 형광막(6)을 배치하고, 그 후면에 형광막(6)을 여기 시켜 줄 수 있는 딥 블루 광원을 백라이트(8)로 설치해서, 광 이용효율의 개선 및 색 순도 향상을 꾀하는 능동 발광형 액정표시소자가 시도된 바 있다.In view of this point, recently, as shown in FIG. 2, the fluorescent film 6 formed on the front glass plate 4 is disposed on the front surface of the liquid crystal display device 2, and the fluorescent film 6 is excited on the rear surface thereof. An active light emitting liquid crystal display device has been attempted to provide a deep blue light source with a backlight 8 to improve light utilization efficiency and color purity.

그러나 상기한 능동 발광형 액정표시소자에서 백라이트(8)의 빛은 액정층(2a)을 투과하기 전·후에 편광판(2b)을 거쳐야 하므로 시각적으로 인식되는 편광으로 인해 전체 디스플레이의 두께를 얇게 하기 어려운 문제점이 있다.However, since the light of the backlight 8 must pass through the polarizing plate 2b before and after passing through the liquid crystal layer 2a in the active light emitting liquid crystal display device, it is difficult to reduce the thickness of the entire display due to the visually recognized polarization. There is a problem.

또 한편으로, 상기 편광판(2b)은 백라이트 광의 일부를 흡수하게 되는 바, 구체적으로 백색광이라 할지라도 편광판에 의해 50％가 감쇄되고, 근자외선 영역의 광원일 경우에는 대략 20％만이 투과되는 것으로 평가되고 있다.On the other hand, the polarizing plate 2b absorbs a part of the backlight light. Specifically, even if it is white light, 50% is attenuated by the polarizing plate, and only about 20% is transmitted when it is a light source in the near ultraviolet region. It is becoming.

그 결과, 종래의 능동 발광형 액정표시소자는 광 투과율의 저하를 감수해야만 되므로, 화면상에서 휘도가 저하되는 문제점이 있다.As a result, the conventional active light emitting liquid crystal display device has to suffer a decrease in the light transmittance, and thus there is a problem that the luminance is lowered on the screen.

따라서, 본 발명은 발광 효율과 화면의 휘도를 향상시키는 방안으로 편광판을 제거하는 것을 기본으로 하여, 전계를 띠었을 때 광을 전달하는 매개체를 광 셔터(shutter)로 사용하므로, 고휘도의 디스플레이를 실현할 수 있도록 한 능동형 발광표시소자를 제공함에 그 목적을 두고 있다.Therefore, the present invention is based on the removal of the polarizing plate in order to improve the luminous efficiency and the brightness of the screen, using a medium that transmits light when an electric field is used as an optical shutter, thereby realizing a high brightness display It is an object of the present invention to provide an active light emitting display device.

상기의 목적을 구현하기 위한 수단으로, 본 발명은 백라이트와, 그 백라이트에 중첩 배치되고 내부에 전계를 띠었을 때 광을 전달하는 매개물(electro-chromic material)이 충전된 광 셔터층과, 상기 광 셔터층의 전면에 배치되고 내측면에 형광막이 형성된 프론트 글라스판으로 구성됨을 특징으로 한다.As a means for realizing the above object, the present invention provides a backlight, an optical shutter layer filled with an electro-chromic material that is superimposed on the backlight and transmits light when an electric field is formed therein; It is characterized by consisting of a front glass plate disposed on the front of the shutter layer and formed with a fluorescent film on the inner surface.

전계를 띠었을 때 광을 전달하는 매개물은 실버가 사용되며, 이것은 전계의 비인가 시에 백라이트 광을 산란시켜 프론트 글라스판으로 표시되지 않게 하고, 전계의 인가 시에는 일렬로 나란하게 상천이 되어 상기 백라이트 광을 투과시키므로, 상기 백라이트 광에 의해 형광막이 여기 발광되게 하여 화상을 표시하는 것이다.Silver is used as a medium that transmits light when an electric field is applied, which scatters backlight light when an electric field is not applied, so that it is not displayed as a front glass plate, and when the electric field is applied, the light is phased side by side and applied to the backlight. Since light is transmitted, the fluorescent film is excited by the backlight and emits light, thereby displaying an image.

도 1은 본 발명에 관련된 능동형 발광표시소자의 구성을 개략적으로 도시한 도면.BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram schematically showing a configuration of an active light emitting display device according to the present invention.

도 2는 종래 공지된 능동 발광형 액정표시소자의 구성을 개략적으로 도시한 도면.2 is a view schematically showing a configuration of a conventionally known active light emitting liquid crystal display device.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

6-형광막 8-백라이트6-fluorescent film 8-backlight

10-광 셔터층 12,14-글라스 기판10-optical shutter layer 12,14-glass substrate

16-매개물 18,20-투명 전극16-mediated 18,20-transparent electrode

이하, 본 발명을 실현하기 위한 바람직한 실시예를 첨부된 도면에 의거하여 보다 상세하게 설명한다.BEST MODE Hereinafter, preferred embodiments for realizing the present invention will be described in detail with reference to the accompanying drawings.

참고로, 본 발명을 설명함에 있어 종래 기술에서 인용된 도면의 구성과 동일한 부분에 대하여는 같은 부호를 부여하기로 한다.For reference, in the description of the present invention will be given the same reference numerals for the same parts as the configuration of the drawings cited in the prior art.

도 1은 본 발명에 관련된 능동형 발광표시소자의 전체 구성을 나타내고 있다.1 shows the overall configuration of an active light emitting display device according to the present invention.

도면에서 백라이트 광(8)에 인접한 광 셔터층(10)은 대향 배치된 한 쌍의 글라스 기판(12, 14) 사이로 전계를 띠면 광을 투과시키는 매개물(16)이 충전된 구성으로 되어 있고, 또 상기 양 글라스 기판(12, 14)의 내측 대향면에는 투명 전극(18, 20)이 적층 형성되어 있다.In the drawing, the optical shutter layer 10 adjacent to the backlight light 8 is configured to be filled with a medium 16 that transmits light when an electric field is applied between a pair of glass substrates 12 and 14 arranged oppositely. Transparent electrodes 18 and 20 are laminated on the inner facing surfaces of the two glass substrates 12 and 14.

이와 같이 구성된 광 셔터층(10)의 전면에는 내측면에 형광막(6)이 도포된 프론트 글라스판(4)이 소정의 간격을 두고 장착된 구조로 이루어진다.On the front surface of the optical shutter layer 10 configured as described above, the front glass plate 4 having the fluorescent film 6 coated on the inner surface thereof is formed at predetermined intervals.

상기 전계를 띠었을 때 광을 투과시키는 매개물(16)은 실버(Ag)가 사용될 수 있다.Silver (Ag) may be used as the medium 16 that transmits light when the electric field is applied.

본 발명에서 백라이트 광(8)으로부터 조사된 광은 직접 광 셔터층(10)으로 입사된다. 이때 광 셔터층(10)의 내부에 수용된 매개물(16)은 투명 전극(18, 20) 사이로 전계가 비인가 된 오프 상태일 때는 2중 3중으로 겹쳐지게 배열되어 광을 난반사시켜 완벽하게 차단하므로 프론트 글라스판(4)의 형광막(6)에 도달되지 못하게 한다.In the present invention, the light irradiated from the backlight light 8 is incident directly to the light shutter layer 10. At this time, the medium 16 accommodated in the optical shutter layer 10 is arranged to be overlapped in two or three times when the electric field is not applied between the transparent electrodes 18 and 20, and diffusely reflects light to completely block the front glass. It does not reach the fluorescent film 6 of the plate 4.

반대로, 상기한 매개물(16)은 전계가 인가되면 백라이트 광의 입사 방향으로 상 천이 됨에 따라, 그 광을 전혀 방해하지 않고 투과시켜 형광막(6)에 조사되게 하므로 여기 발광시키게 된다. 그 결과 상기한 형광막(6)의 발광에 의한 화상이 프론트 글라스판(4)을 통해 밖으로 보여지게 되는 것이다.On the contrary, when the electric field is applied, the medium 16 is shifted in the direction of incidence of the backlight, thereby transmitting the light without disturbing the light at all and irradiating the fluorescent film 6 so that it is excited. As a result, the image by the light emission of the above-mentioned fluorescent film 6 is seen out through the front glass plate 4.

이와 같이 광 셔터층(10)을 스위칭 수단으로 이용하는 본 발명은 편광자와 검광자로 사용되는 편광판을 필요로 하지 않는다. 이 때문에, 백라이트 광의 손실이 없어져서 발광 효율과 화면의 휘도가 대폭 향상된다. 또 능동형 발광표시소자의 부품수가 줄어들어 생산 원가를 낮출 수 있음과 동시에 그 두께도 대폭 축소되므로 슬림화가 용이하게 실현될 수 있다.In this way, the present invention using the optical shutter layer 10 as a switching means does not require a polarizing plate used as a polarizer and an analyzer. This eliminates the loss of backlight light and greatly improves the luminous efficiency and screen brightness. In addition, since the number of parts of the active light emitting display device is reduced, the production cost can be lowered, and the thickness thereof can be greatly reduced, thereby making it easier to slim down.

또한, 상기한 광 셔터층(10)에 충전된 매개물(16)은 고분자 계열인 액정과 달리 광 안정성을 실현할 수 있다.In addition, unlike the polymer-based liquid crystal, the medium 16 filled in the optical shutter layer 10 may realize optical stability.

이상에서 설명된 구성 및 작용을 통하여 알 수 있듯이, 본 발명에 의한 능동형 발광표시소자는 종래 기술의 문제점을 실질적으로 해소하고 있다.As can be seen from the configuration and operation described above, the active light emitting display device according to the present invention substantially solves the problems of the prior art.

즉, 본 발명은 능동형 발광표시소자에서 광 셔터층에 전계가 인가되면 광을 투과시키는 매개물을 주입시킨 구성으로 됨에 따라, 종래의 편광자와 검광자로 사용되는 편광판을 생략할 수 있게 되어, 생산 원가의 절감과 제품의 슬림화를 도모할 수 있는 효과를 가지게 된다.That is, the present invention is configured to inject a medium that transmits the light when an electric field is applied to the optical shutter layer in the active light emitting display device, it is possible to omit the polarizing plate used as a conventional polarizer and an analyzer, the production cost It will have the effect of saving and slimming the product.

또한, 본 발명은 백라이트 광을 손실 없이 이용하는 구성이므로 형광체를 여기 발광시키는 에너지 준위가 높아져 발광 효율과 화면의 휘도도 대폭 향상되는 효과를 얻을 수 있는 것이다.In addition, since the present invention is configured to use backlight light without loss, the energy level for exciting the phosphor is increased, so that the light emission efficiency and the brightness of the screen can be greatly improved.

한편, 본 발명은 상술한 특정의 바람직한 발명에 한정되지 아니하며, 특허 청구의 범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변경 실시가 가능할 것이다.On the other hand, the present invention is not limited to the above-described specific preferred invention, any person having ordinary skill in the art to which the invention belongs without departing from the gist of the invention claimed in the claims. It will be possible.

Claims (2)

백라이트와, 그 백라이트에 중첩 배치되고 내부에 전계를 띠었을 때 광을 전달하는 매개물이 충전된 광 셔터층과, 상기 광 셔터층의 전면에 배치되고 내측면에 형광막이 형성된 프론트 글라스판을 포함하여 구성된 것을 특징으로 하는 능동형 발광표시소자.An optical shutter layer filled with a backlight, a light shutter layer superimposed on the backlight, and a medium for transmitting light when an electric field is applied therein; and a front glass plate disposed on a front surface of the optical shutter layer and having a fluorescent film formed on an inner surface thereof; An active light emitting display device, characterized in that configured. 제 1 항에 있어서, 전계를 띠었을 때 광을 전달하는 매개물은 실버로 된 것을 특징으로 하는 능동형 발광표시소자.The active light emitting display device according to claim 1, wherein the medium which transmits light when subjected to an electric field is made of silver.
KR1019970079093A 1997-12-30 1997-12-30 Active dynamic display KR100258030B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101166832B1 (en) * 2005-06-28 2012-07-19 엘지디스플레이 주식회사 Liquid crystal display device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101166832B1 (en) * 2005-06-28 2012-07-19 엘지디스플레이 주식회사 Liquid crystal display device

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