KR0147602B1 - Lighting apparatus for increase of contrast - Google Patents
Lighting apparatus for increase of contrastInfo
- Publication number
- KR0147602B1 KR0147602B1 KR1019940024770A KR19940024770A KR0147602B1 KR 0147602 B1 KR0147602 B1 KR 0147602B1 KR 1019940024770 A KR1019940024770 A KR 1019940024770A KR 19940024770 A KR19940024770 A KR 19940024770A KR 0147602 B1 KR0147602 B1 KR 0147602B1
- Authority
- KR
- South Korea
- Prior art keywords
- light
- lens array
- contrast
- convex lens
- lighting device
- Prior art date
Links
Classifications
-
- 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
- G02B6/003—Lens or lenticular sheet or layer
-
- 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
- G02B6/0026—Wavelength selective element, sheet or layer, e.g. filter or grating
-
- 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
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
본 발명은 콘트라스트 증대를 위한 조명 장치에 관한 것으로, 상세하게는 램프(광원)로 부터의 출사 빔을 포물면형 반사경 및 렌즈 어레이를 사용하여 평행화된 빔을 출사시키는 콘트라스트 증대를 위한 조명 장치에 관한 것이다.The present invention relates to a lighting device for contrast enhancement, and more particularly, to a lighting device for contrast enhancement by emitting a beam parallelized with a beam emitted from a lamp (light source) using a parabolic reflector and a lens array. will be.
즉, 본 발명에 따른 콘트라스트 증대를 위한 조명 장치는 한 쌍의 볼록렌즈 어레이와 그 사이에 볼록렌즈 어레이의 촛점에 대응하는 점에 홀을 가진 광 차단막을 설치함으로써, 잡광을 제거한 평행광 만을 엄선하여 액정 또는 필름에 투과시켜 영상을 얻으므로 콘트라스트가 명확한 영상을 얻을 수 있는 효과가 있다.That is, the illumination device for increasing the contrast according to the present invention selects only the parallel light from which the light is removed by providing a pair of convex lens arrays and a light blocking film having holes at points corresponding to the focal points of the convex lens arrays. Since the image is obtained by transmitting through a liquid crystal or a film, an image having a clear contrast is obtained.
Description
제 1 도는 렌즈 어레이로 이루어진 콘트라스트 증대를 위한 조명장치의 단면도이다.1 is a cross-sectional view of an illuminating device for increasing contrast formed of a lens array.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 광원(램프) 2 : 포물면 반사경1: light source (lamp) 2: parabolic reflector
3, 5 : 렌즈 어레이 4 : 차단판3, 5: lens array 4: blocking plate
본 발명은 콘트라스트 증대를 위한 조명 장치에 관한 것으로, 상세하게는 램프(광원)로 부터의 출사 빔을 포물면형 반사경 및 렌즈 어레이를 사용하여 평행화된 빔을 출사시키는 콘트라스트 증대를 위한 조명 장치에 관한 것이다.The present invention relates to a lighting device for contrast enhancement, and more particularly, to a lighting device for contrast enhancement by emitting a beam parallelized with a beam emitted from a lamp (light source) using a parabolic reflector and a lens array. will be.
종래의 조명 장치는 단순히 메탈할라이드(metalhalide) 램프 또는 할로겐 램프로 부터 방출되는 빛을 단순히 포물면형 반사경으로 반사시켜 평행화(collimate화)된 빔 형태의 평행광을 만들어 액정이나 기타 필름에 투사시켜 콘트라스트가 높은 영상이 스크린에 맺힐 수 있도록 하고 있다.Conventional lighting devices simply reflect light emitted from a metalhalide lamp or halogen lamp with a parabolic reflector to produce collimated beam-like parallel light and project it onto a liquid crystal or other film to contrast. To allow high-quality images to appear on the screen.
그러나 포물면형 반사경 내의 초점에 위치하는 광원인 메탈할라이드 램프는 점광원이 아닌 상당한 부피를 가지는 광원이므로, 이 메탈할라이드 램프로 부터 방출되는 빛이 포물면 반사경에 반사된 후 모두 평행광으로 진행하여 액정이나 필름에 투사되는 것이 아니다. 이중에는 도면에 점선으로 표시된 광선과 같이, 광원에서 포물면형 반사경에 반사되지 않고 바로 방사상으로 확산하여 액정이나 필름으로 진행하는 광과 광원의 정 촛점에서 발사되지 않아 포물면에서 반사된 후 평행광으로 진행하지 않는 광선이 액정이나 필름을 통과하여 영상을 맺을 경우에는 오히려 영상을 흐려놓게 된다. 즉 콘트라스트를 나쁘게 하는 역효과를 나타내게 된다.However, since the metal halide lamp, which is a light source located at the focal point in the parabolic reflector, is a light source having a considerable volume, not a point light source, the light emitted from the metal halide lamp is reflected by the parabolic reflector and then proceeds to parallel light, so that the liquid crystal or It is not projected on film. Among them, as shown by the dotted line in the drawing, the light does not reflect from the parabolic reflector but diffuses directly to the liquid crystal or film and is not emitted from the focal point of the light source. If the light does not pass through the liquid crystal or film to form an image, the image is rather blurred. In other words, the contrast is adversely affected.
본 발명은 상기와 같은 문제점을 개선하고자 창안된 것으로, 광원에서 방출되어 포물면 반사경에 반사되어 평행으로 진행하는 평행광을 제외한 모든 잡광을 제거하여 영상의 콘트라스트를 높일 수 있는 콘트라스트 증대를 위한 조명 장치를 제공하는데 그 목적이 있다.The present invention has been made to improve the above problems, an illumination device for increasing the contrast that can increase the contrast of the image by removing all the glare except parallel light emitted from the light source reflected in the parabolic reflector and proceeds in parallel The purpose is to provide.
상기와 같은 목적을 달성하기 위하여 본 발명에 따른 콘트라스트 증대를 위한 조명 장치는,In order to achieve the above object, the lighting apparatus for increasing the contrast according to the present invention,
광원과 평행광을 만들어 주기 위한 포물면형 반사경을 구비한 조명 장치에 있어서,A lighting device having a parabolic reflector for producing parallel light with a light source,
상기 평행광을 소정 개수 촛점으로 집속시키는 제1의 볼록렌즈 어레이 ;A first convex lens array for focusing the parallel light to a predetermined number of focus points;
상기 제1의 렌즈 어레이의 초점들에 대응하는 홀을 가진 광 차단판 ;A light blocking plate having holes corresponding to the focal points of the first lens array;
그리고 집속되어 상기 홀을 통과한 빛을 원래의 평행광 형태로 만들어 주는 제2의 볼록렌즈 어레이 ; 를And a second convex lens array focusing the light passing through the hole into an original parallel light shape. To
구비하여 된 것을 특징으로 한다.Characterized in that provided.
본 발명에 있어서, 상기 광 차단판은 광 반사막이 코팅된 반사경으로 이루어지고,In the present invention, the light blocking plate is made of a reflector coated with a light reflecting film,
상기 제1의 볼록렌즈 어레이 및 상기 제2의 볼록렌즈 어레이는 같은 촛점거리를 가지며,The first convex lens array and the second convex lens array have the same focal length,
상기 제1의 렌즈 어레이 및 상기 제2의 렌즈 어레이는 상기 광차단판을 중심으로 같은 거리에 위치하는 것이 바람직하다.Preferably, the first lens array and the second lens array are positioned at the same distance with respect to the light blocking plate.
이하 도면을 참조하면서 본 발명에 따른 콘트라스트 증대를 위한 조명 장치를 설명한다.Hereinafter, a lighting apparatus for increasing contrast according to the present invention will be described with reference to the drawings.
도면을 참조하여 먼저 그 구성을 살펴보면 다음과 같다.Looking at the configuration first with reference to the drawings as follows.
메탈할라이드 램프 등으로 이루어진 광원(1)과 이 광원을 촛점으로 하는 포물면 반사경(2)을 구비하여 평행광을 만든다. 그리고 이 평행광에 섞인 잡광을 제거하기 위하여 광학계를 설치한다. 이 광학계는 평행광을 집속시키는 제1의 볼록렌즈 어레이(3), 이 제1의 볼록렌즈 어레이(3)의 초점 거리에 위치에 집속된 광이 통과할 수 있는 홀을 가진 광 차단판(4) 및 홀을 통과하여 확산하는 광을 원래의 평행광으로 바꿔주는 제2의 볼록렌즈 어레이(5)로 구성된다. 여기서 광 차단판은 그 표면을 빛이 반사될 수 있도록 코팅하여 거울면으로 하면 광효율을 더욱 높일 수 있다.A light source 1 made of a metal halide lamp or the like and a parabolic reflector 2 focusing on the light source are provided to produce parallel light. And an optical system is installed in order to remove the stray light mixed with this parallel light. The optical system includes a first convex lens array 3 that focuses parallel light, and a light blocking plate 4 having holes through which light focused at a position can pass through at a focal length of the first convex lens array 3. And the second convex lens array 5 for converting the light diffused through the hole into the original parallel light. In this case, the light shielding plate may be coated to reflect light, and the light blocking plate may further increase light efficiency.
이와 같이 구성된 콘트라스트 증대를 위한 조명 장치는 다음과 같이 작동된다.The lighting device for increasing contrast thus configured is operated as follows.
먼저 광원으로 부터 출사된 빔은 포물면 반사경에서 반사된 후 평행광으로 되어 제1의 볼록렌즈 어레이를 통과한 후 굴절되어 촛점으로 집속된다. 이 촛점이 맺히는 광 차단판(4)의 대응면에는 홀이 있어 평행광이 집속된 빛만 통과하고 나머지 잡광들은 집속되더라도 홀에 집속되지 않으므로 빛이 차단된다. 이때 차단판(4)이 거울면으로 코팅된 경우에는 차단광이 반사되어 포물면 반사경으로 되돌아가 반사되므로 광효율면에서 우수하다고 할 수 있다.First, the beam emitted from the light source is reflected by the parabolic reflector, becomes parallel light, passes through the first convex lens array, is refracted, and is focused. On the corresponding surface of the light blocking plate 4 formed by this focus, there is a hole, so only parallel light is focused, and the remaining light is not focused on the hole even if focused, so light is blocked. In this case, when the blocking plate 4 is coated with a mirror surface, the blocking light is reflected and returned to the parabolic reflector so as to be excellent in light efficiency.
그리고 홀을 통과한 빛은 다시 제2의 볼록렌즈 어레이(5)에서 굴절되어 원래의 평행광으로 환원되어 액정이나 필름에 투사되므로 콘트라스트가 명확한 영상을 구현할 수 있다. 여기서 중요한 점은 제1의 볼록렌즈 어레이의 초점거리와 제2의 볼록렌즈 어레이의 촛점거리는 같아야 한다는 점이다.In addition, since the light passing through the hole is refracted by the second convex lens array 5 to be reduced to the original parallel light and projected onto the liquid crystal or the film, an image having a clear contrast can be realized. The important point here is that the focal length of the first convex lens array and the focal length of the second convex lens array must be the same.
이상 설명한 바와 같이, 본 발명에 따른 콘트라스트 증대를 위한 조명 장치는 한 쌍의 볼록렌즈 어레이와 그 사이에 볼록렌즈 어레이의 촛점에 대응하는 점에 홀을 가진 광 차단막을 설치함으로써, 잡광을 제거한 평행광 만을 엄선하여 액정 또는 필름에 투과시켜 영상을 얻으므로 콘트라스트가 명확한 영상을 얻을 수 있는 효과가 있다.As described above, the lighting apparatus for increasing contrast according to the present invention is provided with a pair of convex lens arrays and parallel light beams having the light removed therebetween by providing a light blocking film having holes at points corresponding to the focal points of the convex lens arrays. Since only images are carefully selected and transmitted through a liquid crystal or a film, an image can be obtained with a clear contrast.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940024770A KR0147602B1 (en) | 1994-09-29 | 1994-09-29 | Lighting apparatus for increase of contrast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940024770A KR0147602B1 (en) | 1994-09-29 | 1994-09-29 | Lighting apparatus for increase of contrast |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR960011506A KR960011506A (en) | 1996-04-20 |
| KR0147602B1 true KR0147602B1 (en) | 1998-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019940024770A KR0147602B1 (en) | 1994-09-29 | 1994-09-29 | Lighting apparatus for increase of contrast |
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| Country | Link |
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| KR (1) | KR0147602B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100238802B1 (en) * | 1996-11-28 | 2000-01-15 | 전주범 | Projection image display system and a projection method using the same |
| KR100235300B1 (en) * | 1996-12-24 | 1999-12-15 | 김영환 | Apparatus for controling image brightness of lcd projector |
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1994
- 1994-09-29 KR KR1019940024770A patent/KR0147602B1/en not_active IP Right Cessation
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| Publication number | Publication date |
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| KR960011506A (en) | 1996-04-20 |
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