KR100661884B1 - Reflective LCD - Google Patents
Reflective LCDInfo
- Publication number
- KR100661884B1 KR100661884B1 KR1019980062639A KR19980062639A KR100661884B1 KR 100661884 B1 KR100661884 B1 KR 100661884B1 KR 1019980062639 A KR1019980062639 A KR 1019980062639A KR 19980062639 A KR19980062639 A KR 19980062639A KR 100661884 B1 KR100661884 B1 KR 100661884B1
- Authority
- KR
- South Korea
- Prior art keywords
- light
- reflective lcd
- lcd panel
- guide plate
- polarizing plate
- Prior art date
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Classifications
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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
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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
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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
- G02F1/133616—Front illuminating devices
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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)
- Planar Illumination Modules (AREA)
Abstract
본 발명은 반사형 액정표시장치에 관한 것으로, 프런트 라이트 어셈블리의 광이 투과되어 나오는 도광판의 일측면에 편광판을 밀착 설치하여 도광판을 통해 외부로 투과되는 램프의 광량을 줄임으로써, 콘트라스트비를 증가시킬 수 있으며, 사용자의 눈의 피로를 줄일 수 있다.The present invention relates to a reflective liquid crystal display device, and by closely installing a polarizing plate on one side of a light guide plate through which light of a front light assembly is transmitted, reducing the amount of light transmitted to the outside through the light guide plate, thereby increasing contrast ratio. Can reduce the eyestrain of the user.
Description
본 발명은 반사형 액정표시장치에 관한 것으로, 도광판의 전면에 편광판을 부착하여 사용자 측으로 투과되는 광량을 줄여 사용자의 눈의 피로를 줄일 수 있도록 한 반사형 액정표시장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflective liquid crystal display device, and more particularly, to a reflective liquid crystal display device in which a polarizer is attached to a front surface of a light guide plate to reduce the amount of light transmitted to a user side, thereby reducing fatigue of the user's eyes.
일반적으로 액정표시장치는 광원에 따라서 투과형 액정표시장치와 반사형 액정표시장로 대별된다.In general, the liquid crystal display device is classified into a transmissive liquid crystal display device and a reflective liquid crystal display field depending on the light source.
투과형 액정표시장치는 엘시디 패널의 후면에 위치한 백라이트 어셈블리가 광을 엘시디 패널에 투사하여 테이터를 디스플레이할 수 있도록 이루어진다.In the transmissive liquid crystal display, a backlight assembly positioned at the rear of the LCD panel is configured to display data by projecting light onto the LCD panel.
반사형 액정표시장치는 백라이트 어셈블리 없이 외부광원만을 이용하여 데이터를 디스플레이할 수 있도록 이루어진다. 하지만 외부광원이 없는 어두운 곳에서는 반사형 액정표시장치의 특성상 데이터를 볼 수 없다.The reflective liquid crystal display device can display data using only an external light source without a backlight assembly. However, in a dark place without external light sources, data cannot be viewed due to the characteristics of the reflective LCD.
이러한 문제점을 해결하기 위해 반사형 엘시디 패널의 전면에 외부광원용 프런트 라이트 어셈블리가 설치된다.To solve this problem, a front light assembly for an external light source is installed in front of the reflective LCD panel.
이렇게 반사형 엘시디 패널의 전면에 프런트 라이트 어셈블리가 설치됨으로써 어두운 곳에서 반사형 액정표시장치를 사용할 경우, 외부광원 역할을 위해 프런트 라이트 어셈블리가 구동된다.As the front light assembly is installed on the front of the reflective LCD panel, when the reflective liquid crystal display is used in a dark place, the front light assembly is driven to serve as an external light source.
하지만, 도광판을 투과하는 광량이 많아 콘트라스트비의 특성이 저하되고, 사용자의 눈이 쉽게 피로하는 문제점이 있다.However, there is a problem that the amount of light passing through the light guide plate is large, the characteristics of the contrast ratio is lowered, and the user's eyes are easily tired.
따라서, 본 발명의 목적은 도광판을 투과하는 광량을 줄일 수 있도록 하는데 있다.Accordingly, it is an object of the present invention to reduce the amount of light that passes through the light guide plate.
본 발명의 다른 목적은 다음의 상세한 설명 및 첨부된 도면으로부터 보다 명확해질 것이다.Other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.
이와 같은 목적을 달성하기 위해서 본 발명은 프런트 라이트 어셈블리의 도광판의 반사형 엘시디 패널과 대향되는 일측면의 반대면에 특정 방향의 광을 투과시키는 편광부재를 설치할 수 있도록 한다.In order to achieve the above object, the present invention allows a polarizing member for transmitting light in a specific direction to an opposite surface of one side of the front light assembly facing the reflective LCD panel.
이하 첨부된 도면을 참조하여 본 발명의 기술에 따른 실시예에 의한 반사형 액정표시장치를 보다 상세히 살펴보면 다음과 같다.Hereinafter, a reflective liquid crystal display according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.
도 1을 참조하면, 반사형 액정표시장치는 데이터를 디스플레이하는 반사형 엘시디 패널(10), 반사형 엘시디 패널(10)의 데이터표시면 측에 설치되어 광을 발생시키는 프런트 라이트 어셈블리(12) 및 반사형 엘시디 패널(10)과 프런트 라이트 어셈블리(12) 사이에 배치되어 특정 방향의 광만을 투과시키는 제 1 편광판(14)을 포함한다.Referring to FIG. 1, a reflective liquid crystal display device includes a reflective LCD panel 10 for displaying data, a front light assembly 12 installed at a data display surface side of the reflective LCD panel 10 to generate light; A first polarizing plate 14 is disposed between the reflective LCD panel 10 and the front light assembly 12 to transmit only light in a specific direction.
본 발명에 따르면, 프런트 라이트 어셈블리(12)는 광을 발생시키는 램프부(도시되지 않음), 도광판(16) 및 제2 편광판(18)을 포함한다. 도광판(16)은 반사형 엘시디 패널(10)의 데이터표시면 측에 위치하여 램프부의 광을 반사형 엘시디 패널(10) 방향으로 가이드한다. 도광판(16)은 반사형 엘시디 패널(10)의 데이터표시면과 대향하며 램프부로부터 출사되어 가이드된 광이 출사되는 제1 면 및 제1 면과 대향하는 제2 면을 포함한다. 제2 편광판(18)은 제2 면에 부착되어 특정 방향의 광만을 투과시킨다. 제1 편광판(14) 도광판(16)의 제1 면에 배치된다.According to the present invention, the front light assembly 12 includes a lamp portion (not shown) for generating light, a light guide plate 16 and a second polarizing plate 18. The light guide plate 16 is positioned on the data display surface side of the reflective LCD panel 10 to guide the light of the lamp unit toward the reflective LCD panel 10. The light guide plate 16 includes a first surface facing the data display surface of the reflective LCD panel 10 and a second surface facing the first surface to which the guided light exits from the lamp unit. The second polarizing plate 18 is attached to the second surface to transmit only light in a specific direction. The first polarizing plate 14 is disposed on the first surface of the light guide plate 16.
제 2 편광판(18)은 반사형 엘시디 패널(10)로부터 반사되어 제 1 편광판(14)을 투과한 광을 투과할 수 있도록 설치되는 것이 바람직하다.The second polarizing plate 18 is preferably installed so as to transmit the light reflected from the reflective LCD panel 10 and transmitted through the first polarizing plate 14.
이러한 구성을 갖는 반사형 액정표시장치의 작용을 살펴보면, 램프부로부터 출사된 광중 일부는 도광판(16)의 측면을 통해 도광판(16)의 내부로 입사되어 제1 면을 통해 반사형 엘시디 패널(10)의 데이터표시면 방향으로 전면 조사된다. 또한, 램프부로부터 출사된 광의 나머지는 반사형 엘시디 패널(10)의 데이터표시면 방향과 반대되는 방향으로 도광판(16)의 제2 면을 통해 출사된다.Looking at the operation of the reflective liquid crystal display device having such a configuration, some of the light emitted from the lamp unit is incident into the light guide plate 16 through the side of the light guide plate 16 and the reflective LCD panel 10 through the first surface. Is irradiated to the front of the data display surface. In addition, the remainder of the light emitted from the lamp unit is emitted through the second surface of the light guide plate 16 in a direction opposite to that of the data display surface of the reflective LCD panel 10.
한편, 도광판(16)의 제1 면으로부터 출사된 광은 제1 편광판(14)에서 편광되어 반사형 엘시디 패널(10)에 제공된다. 반사형 엘시디 패널(10)에 입사한 광은 반사되어 다시 제1 편광판(14)에 의해 편광된 후, 도광판(16)을 경유하여 도광판(16)의 제2 면을 통해 출사된다.Meanwhile, light emitted from the first surface of the light guide plate 16 is polarized by the first polarizing plate 14 and provided to the reflective LCD panel 10. The light incident on the reflective LCD panel 10 is reflected and polarized by the first polarizing plate 14, and then exits through the second surface of the light guide plate 16 via the light guide plate 16.
제2 편광판(18)은 도광판(16)의 제2 면으로부터 출사된 광을 편광시킨다. 즉, 제2 편광판(18)은 특정 방향의 편광성분만을 통과시키고, 다른 편광성분의 광을 차단시킨다.The second polarizing plate 18 polarizes the light emitted from the second surface of the light guide plate 16. That is, the second polarizing plate 18 passes only polarization components in a specific direction and blocks light of other polarization components.
이때, 제1 편광판(14)을 투과한 광은 반사형 엘시디 패널(10)로부터 출사되는 광으로서 영상정보를 포함하는 광이다. 여기서, 영상정보를 포함하는 광이란, 예를 들어, 반사형 엘시디 패널(10)에서 반사되어 각 화소별로 출사되는 광의 계조 및 광의 색상 등을 의미한다.In this case, the light transmitted through the first polarizing plate 14 is light emitted from the reflective LCD panel 10 and includes light including image information. Here, the light including the image information means, for example, the gradation of the light reflected by the reflective LCD panel 10 and emitted for each pixel, and the color of the light.
따라서, 영상정보를 포함한 광의 손실을 방지하기 위하여, 제2 편광판(18)은 반사형 엘시디 패널(10)에서 반사되어 제1 편광판(14)을 투과한 광을 그대로 투과시키는 것이 바람직하다. 이를 위해서, 본 실시예에서, 제1 편광판(14)의 편광방향과 제2 편광판(18)의 편광방향은, 도 1에 도시된 바와 같이, 서로 일치하도록 배치된다.Therefore, in order to prevent the loss of light including the image information, it is preferable that the second polarizing plate 18 transmits the light reflected by the reflective LCD panel 10 and transmitted through the first polarizing plate 14 as it is. To this end, in this embodiment, the polarization direction of the first polarizing plate 14 and the polarization direction of the second polarizing plate 18 are arranged to coincide with each other, as shown in FIG.
한편, 반사형 엘시디 패널(10)에서 반사되지 않고, 램프로부터 출사되어 도광판(16)을 경유한 후, 곧장 제2 면으로 출사되는 광은 랜덤한 편광으로서 제2 편광판(18)에 의해 대부분 차단된다.On the other hand, the light that is not reflected by the reflective LCD panel 10 and exits from the lamp and passes through the light guide plate 16 is immediately blocked by the second polarizing plate 18 as random polarized light. do.
요컨대, 제2 편광판(18)과 제1 편광판(14)의 편광방향을 일치하도록 배치하면, 반사형 엘시디 패널(10)에서 반사되어 제1 편광판(14)을 투과한 영상정보를 포함하는 광은 거의 손실되지 않고 제2 편광판(18)을 투과하는 반면, 영상정보를 포함하지 않는 불필요한 광은 제2 편광판(18)에 의해 거의 대부분 차단된다.In other words, when the polarization directions of the second polarizing plate 18 and the first polarizing plate 14 are aligned, the light including the image information reflected by the reflective LCD panel 10 and transmitted through the first polarizing plate 14 is Almost no loss is transmitted through the second polarizing plate 18, while unnecessary light containing no image information is almost blocked by the second polarizing plate 18.
그 결과, 종래보다 프런트 라이트 어셈블리(12)로부터 발생되어 외부로 출사되는 광중 영상정보를 포함하지 않는 불필요한 광량이 감소되어 사용자의 눈의 피로가 줄어들며, 데이터표시면의 콘트라스트비가 증가한다.As a result, the amount of unnecessary light generated from the front light assembly 12 that does not include the image information out of the light emitted from the prior art is reduced, thereby reducing fatigue of the user's eyes and increasing the contrast ratio of the data display surface.
이상에서 살펴본 바와 같이, 본 발명은 프런트 라이트 어셈블리의 광이 투과되어 나오는 도광판의 일측면에 편광판을 밀착 설치하여 도광판을 통해 외부로 투과되는 램프의 광량을 줄임으로써 콘트라스트비를 증가시킬 수 있으며, 사용자의 눈의 피로를 줄일 수 있는 효과가 있다.As described above, the present invention can increase the contrast ratio by reducing the amount of light transmitted to the outside through the light guide plate by installing a polarizing plate in close contact with the light guide plate through which the light of the front light assembly is transmitted. Has the effect of reducing eye fatigue.
도 1은 본 발명의 기술에 따른 실시예에 의한 반사형 액정표시장치를 나타낸 사시도.1 is a perspective view showing a reflective liquid crystal display device according to an embodiment of the present invention.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980062639A KR100661884B1 (en) | 1998-12-31 | 1998-12-31 | Reflective LCD |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980062639A KR100661884B1 (en) | 1998-12-31 | 1998-12-31 | Reflective LCD |
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| Publication Number | Publication Date |
|---|---|
| KR20000045979A KR20000045979A (en) | 2000-07-25 |
| KR100661884B1 true KR100661884B1 (en) | 2007-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019980062639A KR100661884B1 (en) | 1998-12-31 | 1998-12-31 | Reflective LCD |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930013802A (en) * | 1991-12-03 | 1993-07-22 | 쯔지 하루오 | Liquid crystal display |
| JPH10268307A (en) * | 1997-03-28 | 1998-10-09 | Sharp Corp | Front lighting device and reflection type liquid crystal display device equipped with the same |
| JPH10326515A (en) * | 1997-03-28 | 1998-12-08 | Sharp Corp | Front lighting system and reflection type liquid crystal display device provided with the system |
-
1998
- 1998-12-31 KR KR1019980062639A patent/KR100661884B1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930013802A (en) * | 1991-12-03 | 1993-07-22 | 쯔지 하루오 | Liquid crystal display |
| KR970008351B1 (en) * | 1991-12-03 | 1997-05-23 | 샤프 가부시끼가이샤 | Liquid crystal display device |
| JPH10268307A (en) * | 1997-03-28 | 1998-10-09 | Sharp Corp | Front lighting device and reflection type liquid crystal display device equipped with the same |
| JPH10326515A (en) * | 1997-03-28 | 1998-12-08 | Sharp Corp | Front lighting system and reflection type liquid crystal display device provided with the system |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000045979A (en) | 2000-07-25 |
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