KR100271489B1 - Active dynamic lcd - Google Patents

Active dynamic lcd

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Publication number
KR100271489B1
KR100271489B1 KR1019980016432A KR19980016432A KR100271489B1 KR 100271489 B1 KR100271489 B1 KR 100271489B1 KR 1019980016432 A KR1019980016432 A KR 1019980016432A KR 19980016432 A KR19980016432 A KR 19980016432A KR 100271489 B1 KR100271489 B1 KR 100271489B1
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KR
South Korea
Prior art keywords
liquid crystal
crystal layer
light
crystal display
partition
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KR1019980016432A
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Korean (ko)
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KR19990084562A (en
Inventor
박도형
허경재
정좌영
Original Assignee
김순택
삼성에스디아이주식회사
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Priority to KR1019980016432A priority Critical patent/KR100271489B1/en
Publication of KR19990084562A publication Critical patent/KR19990084562A/en
Application granted granted Critical
Publication of KR100271489B1 publication Critical patent/KR100271489B1/en

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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509Filters, e.g. light shielding masks
    • G02F1/133512Light shielding layers, e.g. black matrix
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1339Gaskets; Spacers; Sealing of 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)
  • Liquid Crystal (AREA)

Abstract

PURPOSE: An active emitting liquid crystal display is to improve a view angle and a contrast by shielding an incident light passing through a liquid crystal layer, thereby preventing an image scattering in a phosphorous film. CONSTITUTION: A liquid crystal layer(4) adjacent to a backlight(2) comprises polarizing plates attached to each a front and rear surface, and a transparent electrode(4c,4d) is formed between a pair of glass substrates. A liquid crystal material(4e) is filled between the pair of glass substrates. A front glass plate(12) with a phosphorous film(10) coated on internal surface is installed on a front surface of the liquid crystal layer. To realize a light transmitted the liquid crystal layer and a light emitted from the phosphorous film as a same image, a partition(40) having a light selecting functions formed in the liquid crystal layer. The partition is made of carbon absorbing the light. The partition is formed on the rear glass substrate.

Description

능동 발광형 액정표시소자Active light emitting liquid crystal display device

본 발명은 능동 발광형 액정표시소자에 관한 것으로서, 특히 형광막을 여기 발광시키는 백라이트 광을 선별하는 격벽을 갖추어 상퍼짐을 방지하고 동시에 콘트라스트를 향상시킬 수 있도록 한 능동 발광형 액정표시소자에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an active light emitting liquid crystal display device, and more particularly, to an active light emitting liquid crystal display device having a partition wall for selecting backlight light for exciting a fluorescent film to prevent the spreading and to improve the contrast at the same time.

칼라 액정표시소자는 백라이트에서 조사된 광이 편광자를 거쳐 액정층으로 통과되게 하고, 상기 액정층은 배향성을 이용하여 상기 백라이트의 광을 통과시키거나 통과되지 않게 차단하며, 그 액정층을 투과하여 나오는 광이 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 to the liquid crystal layer, and the liquid crystal layer blocks or prevents the light from passing through the liquid crystal layer by using the alignment property. While the light passes through the corresponding color filter, it is configured to implement an 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 액정층의 전면에 형광막을 배치하고, 그 후면에 형광막을 여기 시켜 줄 수 있는 380∼420nm 영역에 속하는 딥 블루 광원을 백라이트로 설치해서, 광 이용효율의 개선 및 색 순도 향상을 꾀하는 능동 발광형 액정표시소자가 시도된 바 있다.In view of this, in recent years, a fluorescent film is disposed on the front surface of the liquid crystal layer, and a deep blue light source belonging to a 380 to 420 nm region capable of exciting the fluorescent film on the rear surface is provided as a backlight, thereby improving light utilization efficiency and color. Active light emitting liquid crystal display devices have been tried to improve the purity.

지금까지 알려진 능동 발광형 액정표시소자에서 형광막은 주피크가 380∼420nm의 파장을 갖는 근자외선에 의해 여기 발광되는 R, G, B의 형광체를 이용하여 제작되는 것이며, 각각의 형광체 사이에 블랙 매트릭스(BM)를 형성한 구조로 되고 있다.In the active light emitting liquid crystal display devices known so far, the fluorescent film is produced by using R, G, and B phosphors whose main peaks are excited by near ultraviolet rays having a wavelength of 380 to 420 nm, and a black matrix between the phosphors. It becomes the structure which formed (BM).

그러나 능동 발광형 액정표시소자에서 백라이트의 광은 액정층을 투과한 후 일부 광이 소정의 각도를 가지고 형광막에 조사되는 바, 상기 액정층을 통과한 상태의 이미지와 다른 형광막을 여기 발광시키므로 상 퍼짐이 발생되는 문제점이 있다.However, in the active light-emitting type liquid crystal display device, the light of the backlight passes through the liquid crystal layer, and then some light is irradiated to the fluorescent film at a predetermined angle. There is a problem that spreading occurs.

그 결과 종래의 능동 발광형 액정표시소자는 화면상에서 시야각과 콘트라스트가 저하되는 문제점을 초래하게 된다.As a result, the conventional active emission type liquid crystal display device causes a problem that the viewing angle and contrast on the screen is lowered.

따라서, 본 발명은 형광막에서의 상 퍼짐을 방지하는 방안으로 액정층을 통과하여 소정의 각도로 입사되는 광을 차단하여, 시야각과 콘트라스트가 향상된 디스플레이를 실현할 수 있도록 함에 그 목적을 두고 있는 것이다.Therefore, an object of the present invention is to block light incident through a liquid crystal layer and to be incident at a predetermined angle in order to prevent spreading in a fluorescent film, thereby realizing a display having improved viewing angle and contrast.

상기의 목적을 구현하기 위한 수단으로, 본 발명은 백라이트의 광이 액정층의 스위칭 작용에 의해 소망의 형광막에 조사되어 여기 발광되도록 한 능동 발광형 액정표시소자에 있어서, 상기 액정층의 내부에 형광막과 같은 패턴을 갖는 격벽을 형성한 구성으로 이루어진다.As a means for achieving the above object, the present invention is an active light emitting type liquid crystal display device in which the light of the backlight is irradiated to the desired fluorescent film by the switching action of the liquid crystal layer to emit excitation light, the inside of the liquid crystal layer It consists of the structure which formed the partition which has a pattern like a fluorescent film.

상기한 격벽은 광을 흡수하는 카본 재질로 형성되는 것이며, 이것은 액정층을 통과하여 소정의 각도로 조사되는 광을 흡수하여 차단하고, 소망의 형광막으로 입사되는 광만을 투과시키므로, 액정층과 같은 이미지로 형광막이 여기 발광되게 하여 화상을 표시하는 것이다.The barrier rib is formed of a carbon material which absorbs light. The barrier rib absorbs and blocks light that passes through the liquid crystal layer and is irradiated at a predetermined angle, and transmits only light incident to a desired fluorescent film. The fluorescent film is excited to emit light as an image to display an image.

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

도 2는 본 발명에 관련된 액정층의 내부 구조를 보인 평면도.2 is a plan view showing the internal structure of a liquid crystal layer according to the present invention.

도 3은 본 발명의 다른 실시예에 의한 액정층의 내부 구조를 보인 평면도.3 is a plan view showing the internal structure of a liquid crystal layer according to another embodiment of the present invention.

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

4-액정층 4a,4b-글라스 기판4-liquid crystal layer 4a, 4b-glass substrate

10-형광막 10a-블랙 매트릭스10-fluorescent film 10a-black matrix

40-격벽40-bulk

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.

도 1은 본 발명에 관련된 능동 발광형 액정표시소자의 전체 구성을 나타내고 있다.1 shows the overall configuration of an active light emitting liquid crystal display device according to the present invention.

도면에서 백라이트(2)에 인접한 액정층(4)은 전·후면에 각각 편광자(6)와 검광자(8)로 사용되는 편광판이 부착된 것이며, 대향 배치된 한 쌍의 글라스 기판(4a, 4b) 사이에 투명 전극(4c, 4d)이 형성되고, 그 내부에 액정 물질(4e)이 충전된 구성으로 되어 있다.In the drawing, the liquid crystal layer 4 adjacent to the backlight 2 has a polarizer 6 used as a polarizer 6 and an analyzer 8 attached to the front and rear surfaces, respectively, and a pair of glass substrates 4a and 4b disposed opposite to each other. The transparent electrodes 4c and 4d are formed in between, and the liquid crystal material 4e is filled therein.

이와 같이 구성된 액정층(4)의 전면에는 내측면에 형광막(10)이 도포된 프론트 글라스판(12)이 소정의 간격을 두고 장착된 구조로 이루어진다.The front glass plate 12 having the fluorescent film 10 coated on the inner surface of the liquid crystal layer 4 having the above structure is mounted at a predetermined interval.

여기서, 본 발명은 액정층(4)으로 투과된 광과 형광막(10)에 여기 발광되는 광을 동일 이미지로 구현하기 위해, 액정층(4)의 내부에 광 선별 기능을 갖는 격벽(40)을 형성한 구성으로 이루어진다.Here, in order to implement the light transmitted through the liquid crystal layer 4 and the light emitted by the fluorescent film 10 as excitation in the same image, the partition wall 40 having a light selection function inside the liquid crystal layer 4. It is made of a configuration formed.

보다 구체적으로, 격벽(40)은 광을 흡수하는 물질인 카본을 이용하여 제작되는 것이며, 백라이트(2)로부터 소정의 각도를 가지로 입사된 광을 차단하여 흡수하므로, 액정층(4)을 통과하여 형광막(10)으로 입사되는 광을 동일 이미지로 구현할 수 있는 것이다.More specifically, the partition wall 40 is made of carbon, which absorbs light, and blocks and absorbs light incident from the backlight 2 at a predetermined angle, and thus passes through the liquid crystal layer 4. Thus, the light incident on the fluorescent film 10 may be implemented in the same image.

격벽(40)은 액정층(4)의 제조 과정에서 액정 물질의 주입을 용이하게 실현하기 위해, 글라스 기판의 일측 예를 들어 후면 글라스 기판(4a)에 형성되고, 상면 글라스 기판(4b)과의 사이에 소정의 갭(gap)을 갖도록 형성된다. 이때, 액정층(4)의 셀 갭은 도시되지 않은 스페이서에 의해 유지될 수 있다.The partition wall 40 is formed on one side of the glass substrate, for example, the rear glass substrate 4a, so as to easily inject the liquid crystal material in the manufacturing process of the liquid crystal layer 4, and the upper glass substrate 4b. It is formed to have a predetermined gap therebetween. In this case, the cell gap of the liquid crystal layer 4 may be maintained by a spacer (not shown).

본 출원인은 도 2를 통하여 상기한 격벽(40)의 일 예를 제시하고자 한다. 기본적으로 상기한 격벽(40)은 액정층(4)으로 통과된 광과 형광막(10)에 여기 발광되는 광을 동일 이미지로 구현하기 위해, 형광막(10)의 블랙 매트릭스(10a)와 동일 패턴으로 형성되는 것이 바람직한 것이다. 도면에서, 본 발명의 격벽(40)은 스트라이프 타입으로 됨을 나타내고 있다.Applicant intends to present an example of the partition wall 40 through FIG. Basically, the partition wall 40 is the same as the black matrix 10a of the fluorescent film 10 in order to realize the light passing through the liquid crystal layer 4 and the light emitted by the fluorescent film 10 in the same image. It is preferable to be formed in a pattern. In the figure, the partition wall 40 of the present invention is shown to be a stripe type.

또한, 본 발명에 의한 격벽(40)은 도 3을 통하여 알 수 있는 바와 같이 랙탱귤러(rectangular) 타입으로 형성될 수 있으며, 또 한편으로 도시되지 않은 도트 타입으로 형성될 수도 있는 것이다.In addition, the partition wall 40 according to the present invention may be formed in a rack tangular (rectangular) type, as can be seen through Figure 3, it may also be formed in a dot type not shown on the other hand.

본 발명에서 백라이트(2)로부터 조사된 광은 액정층(4)으로 입사된다. 액정층(4)의 내부에 형성된 액정 물질(4e)은 투명 전극(4c, 4d) 사이로 전계가 인가되면 상 천이되어, 광을 투과시키고 형광막(10)에 조사되게 하므로 여기 발광되게 한다. 이때 본 발명의 격벽(40)은 소정의 각도로 입사된 광을 차단하여 흡수하고, 소망의 형광막(10)으로 조사되는 광만을 투과시킨다. 그 결과 상기한 형광막(10)의 발광에 의한 화상은 프론트 글라스판(12)을 통해 밖으로 보여지게 되는 것이다.In the present invention, light irradiated from the backlight 2 is incident on the liquid crystal layer 4. The liquid crystal material 4e formed inside the liquid crystal layer 4 is phase shifted when an electric field is applied between the transparent electrodes 4c and 4d, transmits light and irradiates the fluorescent film 10, thereby causing excitation light emission. At this time, the partition wall 40 of the present invention blocks and absorbs the light incident at a predetermined angle, and transmits only the light irradiated to the desired fluorescent film 10. As a result, the image by the light emission of the fluorescent film 10 is seen out through the front glass plate 12.

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

즉, 본 발명은 능동 발광형 액정표시소자에서 액정층의 내부에 격벽을 설치하여, 그 격벽에 의해 소정의 각도로 불량하게 조사되는 백라이트 광을 차단하고, 소망의 광만이 형광막으로 입사되어 여기 발광되게 하므로, 상 퍼짐이 방지되도록 한 것이다.That is, according to the present invention, a partition wall is provided inside the liquid crystal layer in an active light-emitting liquid crystal display device to block backlight light that is poorly irradiated at a predetermined angle by the partition wall, and only desired light enters the fluorescent film and is excited. Since light is emitted, phase spreading is prevented.

따라서, 본 발명에 의하면 백라이트 광의 분산 없이 직진 방향으로 조사되는 광만을 이용하므로, 시야각과 콘트라스트도 대폭 향상된 화상을 구현하는 효과를 얻을 수 있다.Therefore, according to the present invention, since only the light irradiated in the straight direction without using the backlight light is dispersed, the effect of realizing a significantly improved view angle and contrast can be obtained.

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 (5)

백라이트의 광이 액정층의 스위칭 작용에 의해 소망의 형광막에 조사되어 여기 발광되도록 한 능동 발광형 액정표시소자에 있어서, 상기 액정층의 내부에 형광막과 같은 패턴을 갖는 격벽이 형성된 구성을 특징으로 하는 능동 발광형 액정표시소자.An active light emitting liquid crystal display device in which light of a backlight is irradiated to a desired fluorescent film by a switching action of a liquid crystal layer to emit an excitation light, wherein a partition having a pattern like a fluorescent film is formed inside the liquid crystal layer. An active light emitting liquid crystal display device. 제 1 항에 있어서, 격벽은 카본으로 형성된 것을 특징으로 하는 능동 발광형 액정표시소자.The active light emitting liquid crystal display device according to claim 1, wherein the partition wall is formed of carbon. 제 1 항에 있어서, 격벽의 패턴은 스트라이프 타입으로 된 것을 특징으로 하는 능동 발광형 액정표시소자.The active light emitting liquid crystal display device according to claim 1, wherein the partition pattern has a stripe type. 제 1 항에 있어서, 격벽의 패턴은 도트 타입으로 된 것을 특징으로 하는 능동 발광형 액정표시소자.The active light emitting liquid crystal display device according to claim 1, wherein the partition wall pattern has a dot type. 제 1 항에 있어서, 격벽의 패턴은 랙탱귤러 타입으로 된 것을 특징으로 하는 능동 발광형 액정표시소자.The active light emitting liquid crystal display device according to claim 1, wherein the partition pattern has a rack-tangular type.
KR1019980016432A 1998-05-08 1998-05-08 Active dynamic lcd KR100271489B1 (en)

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