KR20020016414A - Reflector of lamp for projection display - Google Patents

Reflector of lamp for projection display Download PDF

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Publication number
KR20020016414A
KR20020016414A KR1020000049717A KR20000049717A KR20020016414A KR 20020016414 A KR20020016414 A KR 20020016414A KR 1020000049717 A KR1020000049717 A KR 1020000049717A KR 20000049717 A KR20000049717 A KR 20000049717A KR 20020016414 A KR20020016414 A KR 20020016414A
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KR
South Korea
Prior art keywords
reflector
light
bulb
projection display
light source
Prior art date
Application number
KR1020000049717A
Other languages
Korean (ko)
Inventor
백승욱
전광조
Original Assignee
이형도
삼성전기주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이형도, 삼성전기주식회사 filed Critical 이형도
Priority to KR1020000049717A priority Critical patent/KR20020016414A/en
Publication of KR20020016414A publication Critical patent/KR20020016414A/en

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/28—Reflectors in projection beam
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3197—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using light modulating optical valves

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)

Abstract

PURPOSE: A reflector of a light source lamp for a projection display is provided to maximize the optical efficiency and to improve uniformity by designing a reflector corresponding to the light distribution of a bulb. CONSTITUTION: A reflector is designed as an oval unit corresponding to the light distribution of a bulb. Herein, the distance(a) between focuses is 102.1mm. The effective diameter(b) of a reflecting surface is 78.8mm. The diameter(r) of a parabolic reflector is 119.7mm. The light distribution of the bulb is concentrated between 30 degrees and 150 degrees from an optical axis without loss. Therefore, the light efficiency is maximized.

Description

프로젝션 디스플레이용 광원램프의 리플렉터 {Reflector of lamp for projection display}Reflector of light source lamp for projection display {Reflector of lamp for projection display}

본 발명은 프로젝션 디스플레이용 광원램프의 리플렉터에 관한 것으로서, 더욱 상세하게는 광원으로 사용되는 벌브의 배광분포 및 도광용으로 사용되는 광 파이프의 사이즈에 따라 타원형 리플렉터의 곡면형상 및 타원의 초점거리를 결정한 프로젝션 디스플레이용 광원램프의 리플렉터에 관한 것이다.The present invention relates to a reflector of a light source lamp for a projection display. More particularly, the curved shape of an elliptical reflector and the focal length of an ellipse are determined according to the light distribution and bulb size of the bulb used as a light source. A reflector of a light source lamp for a projection display.

일반적으로 프로젝션(projection)용으로 사용되는 램프(lamp)는 리플렉터(reflector)의 형태에 따라 크게 타원형(parabolic lamp)과 포물형(elliptic lamp)으로 구분된다. 이때, 타원형의 경우는 광원으로 사용되는 벌브(bulb)에서 발산되는 광을 하나의 초점에 집광시키는 방식으로서 도광부를 광 파이프(light pipe)를 사용하는 방식에 주로 사용되며, 포물형의 경우는 벌브에서발산되는 광을 원하는 방향으로 평행하게 반사시키는 방식으로 플라이 아이 렌즈(fly-eye lens)와 함께 주로 사용된다.In general, lamps used for projection are largely divided into parabolic lamps and elliptic lamps according to the shape of the reflector. In this case, the elliptical type is a method of condensing light emitted from a bulb used as a light source at one focal point, and is mainly used for a light guide part using a light pipe. It is mainly used with a fly-eye lens in a manner that reflects light emitted in parallel in the desired direction.

종래의 기술에서 프로젝션 디스플레이용 광원램프의 리플렉터는 사이즈(size) 만을 고려하여 벌브와 리플렉터를 조합하였기 때문에 광효율이 낮아지며, 균일성이 저하되는 문제점이 발생하였다.In the related art, the reflector of the light source lamp for the projection display has a problem in that light efficiency is lowered and uniformity is lowered because the bulb and the reflector are combined in consideration of size.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서, 그 목적은 타원형 리플렉터를 사용하는 방식에 있어서 리플렉터의 형상 설계를 변경하여 최적의 효율을 얻을 수 있도록 한 프로젝션 디스플레이용 광원램프의 리플렉터를 제공하는데 있다.The present invention has been made to solve the above problems, the object of the present invention is to provide a reflector of a light source lamp for a projection display to obtain the optimum efficiency by changing the shape design of the reflector in the manner of using an elliptical reflector. It is.

도 1은 일반적인 타원경의 원리를 나타내는 도면1 is a view showing the principle of a general ellipsoid

도 2는 벌브의 배광특성을 나타내는 그래프2 is a graph showing light distribution characteristics of a bulb

도 3은 본 발명에 따른 리플렉터의 형상을 나타내는 도면3 is a view showing the shape of the reflector according to the present invention;

상기와 같은 목적을 달성하기 위한 본 발명의 특징에 따르면, 벌브(bulb)의 배광분포를 고려하여 광효율 및 균일성을 최대화할 수 있도록 타원형으로 설계하되, 초점간 거리 a는 102.1mm 이고, 유효 반사면경 d는 78.8mm 이고, 포물경 장축직경 r은 119.7mm 로 설계한 프로젝션 디스플레이용 광원램프의 리플렉터를 제공한다.According to a feature of the present invention for achieving the above object, in consideration of the light distribution distribution of the bulb (bulb) in consideration of the elliptical design to maximize the light efficiency and uniformity, the focal length a is 102.1mm, effective reflection The surface diameter d is 78.8mm and the parabolic long axis diameter r is 119.7mm, which provides a reflector of the light source lamp for the projection display.

본 발명의 상술한 목적과 여러 가지 장점은 이 기술 분야에 숙련된 사람들에 의해 첨부된 도면을 참조하여 후술되는 발명의 바람직한 실시예로부터 더욱 명확하게 될 것이다.The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

이하, 본 발명의 바람직한 실시예를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

일반적으로, 광원으로 사용되는 벌브의 경우, 제조회사 마다 벌브가 갖는 배광분포(angular distribution)가 제각기 차이가 나기 때문에 벌브에서 발산되는 광을 최대한 사용할 수 있도록 타원경 리플렉터를 설계하지 않으면 최적의 광효율을 얻을 수 없게 된다.In general, bulbs used as a light source have different angular distributions of bulbs, so that if the ellipsoidal reflector is not designed to use the light emitted from the bulb as much as possible, optimal light efficiency may be achieved. You won't get it.

또한, 리플렉터의 설계시 사용 시스템의 사이즈 변수(size factor) 및 얻고자 하는 균일성, 도광부의 입사부 면적을 고려하여야 한다. 즉, 타원경 리플렉터 설계시 고려하여야 할 주요 변수는 벌브의 배광분포 특성, 사용 시스템의 사이즈 변수, 도광부와 입사부 면적, 균일성 등이 된다.In addition, the design of the reflector should take into account the size factor of the system used, the uniformity to be obtained, and the area of the light incident portion. That is, the main variables to be considered in the design of the ellipsoidal reflector are the light distribution characteristics of the bulb, the size variable of the system used, the area of the light guide part and the incident part, and the uniformity.

본 발명에 의한 광원램프의 리플렉터 시스템의 설계시 도 1 및 도 2에 도시된 바와 같이, 사용된 벌브의 배광분포는 광축으로부터 반각으로 30도 내지 150도 사이에 집중되어 있으므로 이를 손실없이 모두 반사시킬 수 있도록 하여 광효율을 극대화하였다.In the design of the reflector system of the light source lamp according to the present invention, as shown in Figs. 1 and 2, the light distribution of the bulb used is concentrated between 30 degrees and 150 degrees at half angles from the optical axis so that it can be reflected without any loss. To maximize the light efficiency.

또한, 광축과 평행하거나 평행에 가까운 빛이 많은 경우 주변부에 비해 중심부의 밝기가 너뮤 높아 균일성에 문제가 있으므로 균일성을 최대화하기 위해 시뮬레이션을 거쳐 타원경의 반경 및 초점거리를 설정하였다.In addition, when there is a lot of light parallel to or near parallel to the optical axis, the brightness of the center is too high compared to the periphery, and thus there is a problem in uniformity.

도 1에서 사용한 도광부인 광 파이프(light pipe)의 단면적은 4.1mm*5.0mm 이고, 이에 대하여 광축 중심 대비 도광부 최외곽의 광량저하를 85%에 이르도록 설계하였다.The cross-sectional area of the light pipe (light pipe) used in FIG. 1 is 4.1 mm * 5.0 mm, and the light reduction of the outermost part of the light guide portion relative to the optical axis center is designed to reach 85%.

상기와 같은 조건에 따른 시뮬레이션 결과 얻은 리플렉터의 형상은 도 3에도시된 바와 같다.The shape of the reflector obtained as a result of the simulation under the above conditions is as shown in FIG. 3.

도 3에서, 초점간 거리 a는 102.1mm 이고, 유효 반사면경 d는 78.8mm 이고, 포물경 장축직경 r은 119.7mm 로 하는 것이 바람직하다.In Fig. 3, the focal length a is 102.1 mm, the effective reflecting surface diameter d is 78.8 mm, and the parabolic long axis diameter r is preferably 119.7 mm.

이상의 설명에서 본 발명은 특정의 실시예와 관련하여 도시 및 설명하였지만, 특허청구범위에 의해 나타난 발명의 사상 및 영역으로부터 벗어나지 않는 한도 내에서 다양한 개조 및 변화가 가능하다는 것을 당 업계에서 통상의 지식을 가진 자라면 누구나 쉽게 알 수 있을 것이다.While the invention has been shown and described in connection with specific embodiments thereof, it is well known in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.

이상에서 설명한 바와 같은 본 발명의 프로젝션 디스플레이용 광원램프의 리플렉터는 벌브의 배광분포를 고려하여 설계함으로써 동일한 파워(power)를 갖는 벌브를 사용하여 광효율을 최대화할 수 있으며, 균일성을 향상시킬 수 있는 효과가 있다.As described above, the reflector of the light source lamp for a projection display according to the present invention may be designed in consideration of the light distribution of the bulb, thereby maximizing light efficiency using a bulb having the same power, and improving uniformity. It works.

Claims (1)

벌브(bulb)의 배광분포를 고려하여 광효율 및 균일성을 최대화할 수 있도록 타원형으로 설계한 프로젝션 디스플레이용 광원램프의 리플렉터에 있어서,In the reflector of the projection lamp light source lamp designed to elliptically maximize the light efficiency and uniformity in consideration of the light distribution of the bulb, 초점간 거리 a는 102.1mm 이고, 유효 반사면경 d는 78.8mm 이고, 포물경 장축직경 r은 119.7mm 로 설계한 것을 특징으로 하는 프로젝션 디스플레이용 광원램프의 리플렉터.A reflector of a light source lamp for a projection display, characterized in that the focal length a is 102.1 mm, the effective reflecting mirror d is 78.8 mm, and the parabolic long axis diameter r is 119.7 mm.
KR1020000049717A 2000-08-25 2000-08-25 Reflector of lamp for projection display KR20020016414A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03196133A (en) * 1989-12-26 1991-08-27 Nippon Sheet Glass Co Ltd Illumination light source device
JPH04340946A (en) * 1991-05-17 1992-11-27 Canon Inc Illuminating optical system and projection type picture display device using it
JPH05276470A (en) * 1992-03-26 1993-10-22 Toshiba Corp Lamp for projecting liquid crystal display
JPH06347780A (en) * 1993-06-10 1994-12-22 Casio Comput Co Ltd Light source device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03196133A (en) * 1989-12-26 1991-08-27 Nippon Sheet Glass Co Ltd Illumination light source device
JPH04340946A (en) * 1991-05-17 1992-11-27 Canon Inc Illuminating optical system and projection type picture display device using it
JPH05276470A (en) * 1992-03-26 1993-10-22 Toshiba Corp Lamp for projecting liquid crystal display
JPH06347780A (en) * 1993-06-10 1994-12-22 Casio Comput Co Ltd Light source device

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