JP2000010045A - Prism device and projection type display device - Google Patents
Prism device and projection type display deviceInfo
- Publication number
- JP2000010045A JP2000010045A JP10173665A JP17366598A JP2000010045A JP 2000010045 A JP2000010045 A JP 2000010045A JP 10173665 A JP10173665 A JP 10173665A JP 17366598 A JP17366598 A JP 17366598A JP 2000010045 A JP2000010045 A JP 2000010045A
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- Prior art keywords
- prism
- light
- angle
- transparent plate
- equation
- Prior art date
- Legal status (The legal status 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 status listed.)
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- Optical Elements Other Than Lenses (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
- Projection Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、プリズム装置及び
投写型表示装置に関する。The present invention relates to a prism device and a projection display device.
【０００２】[0002]
【従来の技術】大画面映像を得るために、ライトバルブ
に映像信号に応じた光学像を形成し、その光学像に光を
照射し投写レンズによりスクリーン上に拡大投写する方
法が従来よりよく知られている。ライトバルブとして、
映像信号に応じて光の進行方向を制御することにより画
像を形成する反射型の配光補正素子を用いれば光利用効
率の高い高輝度の投写画像を表示できる。2. Description of the Related Art In order to obtain a large-screen image, a method of forming an optical image corresponding to an image signal on a light valve, irradiating the optical image with light, and enlarging and projecting the image on a screen by a projection lens is well known. Have been. As a light valve,
If a reflection type light distribution correction element that forms an image by controlling the traveling direction of light according to a video signal is used, a high-brightness projected image with high light use efficiency can be displayed.
【０００３】反射型ライトバルブを用いた投写型表示装
置の光学系の従来例の構成を図７に示す。ランプ１ａ、
凹面鏡１ｂで光源１が構成されている。凹面鏡は楕円面
鏡であり、ガラス製機材の内面に赤外光を透過させ可視
光を反射させる光学多層膜を蒸着したものである。ラン
プ１はその発光体の中心が凹面鏡１ｂの第１焦点ｆ1に
位置するように配置されている。ランプ１から放射され
る光は凹面鏡１ｂにより反射され、第２焦点ｆ2に向か
う。光源１ａから出た光は、凹面鏡１ｂの第２焦点ｆ2
に発光体像を形成し、第２焦点ｆ2を通過した光はリレ
ーレンズ２に入射する。リレーレンズ２を出射した光は
全反射ミラー３によって反射され、フィールドレンズ４
を経て全反射プリズム６に入射する。全反射プリズム６
は２つの単体プリズムを空気層８を介して配置したもの
であり、入射光は空気層８の界面によって全反射してラ
イトバルブ５側へ進行するように構成されている。ライ
トバルブ５は映像信号に応じて光の進行方向を制御して
反射角の変化として光学像が形成される。ライトバルブ
５からの反射光は、プリズム６を透過後、投写レンズ７
に入射し、ライトバルブ５上の光学像は投写レンズ７に
よりスクリーン上に拡大投写される。ここで、全反射プ
リズム６の構成と作用について図８を用いて以下に説明
する。FIG. 7 shows a configuration of a conventional example of an optical system of a projection display device using a reflection type light valve. Lamp 1a,
The light source 1 is constituted by the concave mirror 1b. The concave mirror is an elliptical mirror, and is formed by depositing an optical multilayer film that transmits infrared light and reflects visible light on the inner surface of a glass device. Lamp 1 has the center of its light emitters are arranged so as to be positioned at the first focal point f 1 of the concave mirror 1b. Light emitted from the lamp 1 is reflected by the concave mirror 1b, toward the second focal point f 2. The light emitted from the light source 1a is transmitted to the second focal point f 2 of the concave mirror 1b.
The light that has passed through the second focal point f 2 is incident on the relay lens 2. The light emitted from the relay lens 2 is reflected by the total reflection mirror 3 and
And enters the total reflection prism 6. Total reflection prism 6
Is configured such that two single prisms are arranged via an air layer 8, and the incident light is totally reflected by an interface of the air layer 8 and travels to the light valve 5 side. The light valve 5 controls the traveling direction of light in accordance with a video signal to form an optical image as a change in reflection angle. The reflected light from the light valve 5 passes through the prism 6 and then enters the projection lens 7.
And the optical image on the light valve 5 is enlarged and projected on the screen by the projection lens 7. Here, the configuration and operation of the total reflection prism 6 will be described below with reference to FIG.
【０００４】全反射プリズム６は第１プリズム１２と第
２プリズム１３とで構成され、第１プリズムの第１面１
４に近接してライトバルブ５が配置され、第１プリズム
の第２面１５は第２プリズム１３の第１面１７と空気層
８を形成している。第２プリズム１３の第２面１８は、
第１プリズム１２の第１面１４と平行であり、第３面１
９は第２面１８と垂直である。第１プリズム１２の第３
面１６から入射した光２１は第１プリズム１２の第２面
１５で全反射してライトバルブ５に斜め方向から入射す
る。投写画像として反射される光２２は、光学軸がライ
トバルブ５に対して垂直に進行する。また、不要光とし
て反射される光２３，２４は、光２２とは異なる角度で
進行するが、第２プリズム１３の第３面１９で反射され
て投写レンズ側に進行する場合と、直接第２プリズム１
３の第２面１８から出射する場合が考えられる。The total reflection prism 6 is composed of a first prism 12 and a second prism 13, and the first surface 1 of the first prism
The light valve 5 is disposed close to the first prism 4, and the second surface 15 of the first prism forms the air layer 8 with the first surface 17 of the second prism 13. The second surface 18 of the second prism 13 is
The third surface 1 is parallel to the first surface 14 of the first prism 12.
9 is perpendicular to the second surface 18. Third of first prism 12
Light 21 incident from the surface 16 is totally reflected by the second surface 15 of the first prism 12 and enters the light valve 5 from an oblique direction. The light 22 reflected as the projected image travels with its optical axis perpendicular to the light valve 5. The lights 23 and 24 reflected as unnecessary light travel at an angle different from that of the light 22. However, the light 23 and 24 are reflected by the third surface 19 of the second prism 13 and travel to the projection lens side. Prism 1
3 may be emitted from the second surface 18.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記従来の構
成の、図８に示した全反射プリズムを用いる場合、不要
光の一部が投写レンズの有効部に入射し、スクリーン上
に到達するため、投写画像のコントラストを劣化させる
という課題があった。However, in the case of using the above-mentioned conventional total reflection prism shown in FIG. 8, a part of the unnecessary light enters the effective portion of the projection lens and reaches the screen. However, there is a problem that the contrast of the projected image is deteriorated.
【０００６】本発明は、このような従来の上記課題を考
慮し、コントラストをより良好にすることが出来るプリ
ズム装置、およびそのプリズム装置を用いた用いた投写
型表示装置を提供することを目的とする。An object of the present invention is to provide a prism device capable of improving the contrast in consideration of the above-mentioned conventional problems, and a projection display device using the prism device. I do.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
本発明のプリズム装置（請求項１記載の発明に対応）
は、ライトバルブと、前記ライトバルブ側から順に設け
られた、第１のプリズムと、第２のプリズムと、第３の
プリズムと、前記第１のプリズムと前記第２のプリズム
との間、及び前記第２のプリズムと前記第３のプリズム
との間に設けられた薄い空気層とを備え、前記３個のプ
リズムは三角プリズムであり、前記第１のプリズムは、
前記ライトバルブに近接する第１面と、前記第２のプリ
ズムとの間に前記空気層を形成する第２面と、前記ライ
トバルブからの反射光が入射する第３面とを有し、ま
た、前記第２のプリズムは、前記第１のプリズムとの間
に前記空気層を形成する第１面と、前記第３のプリズム
との間に前記空気層を形成する第２面と、光が入射する
第３面とを有し、また、前記第３のプリズムは、前記第
２のプリズムとの間に前記空気層を形成する第１面と、
前記ライトバルブからの反射光が出射し、かつ前記第１
のプリズムの前記第１面と平行な第２面と、第３面とを
有するプリズム装置である。Means for Solving the Problems To solve the above-mentioned problems, the prism device of the present invention (corresponding to the first aspect of the present invention)
Is a light valve, and a first prism, a second prism, a third prism, a portion between the first prism and the second prism, which are provided in this order from the light valve side, and A thin air layer provided between the second prism and the third prism, wherein the three prisms are triangular prisms, and the first prism is
A first surface proximate to the light valve, a second surface forming the air layer between the second prism, and a third surface on which reflected light from the light valve is incident; The second prism has a first surface that forms the air layer between the first prism and the second prism; a second surface that forms the air layer between the third prism and the second prism; A third surface on which an air layer is formed between the third prism and the second prism;
The reflected light from the light valve is emitted and the first light
A prism device having a second surface parallel to the first surface of the prism and a third surface.
【０００８】又、本発明の投写型表示装置（請求項６記
載の発明に対応）は、光源と、ライトバルブと、複合プ
リズムと、投写レンズとを具備しており、前記ライトバ
ルブは反射型であり、映像信号に応じて光の進行方向を
制御することにより画像を形成する配光補正素子であ
り、前記複合プリズムは、前記ライトバルブ側から順
に、第１のプリズムと、第２のプリズムと、第３のプリ
ズムとを備え、前記第１のプリズムと前記第２のプリズ
ムとの間、前記第２のプリズムと前記第３のプリズムと
の間にはそれぞれ薄い空気層が設けられ、前記３つのプ
リズムは三角プリズムであり、前記第１のプリズムは、
前記ライトバルブに近接する第１面と、前記第２のプリ
ズムとの間に前記空気層を形成する第２面と、前記ライ
トバルブからの反射光が入射し、研磨面又は鏡面であ
り、かつ光吸収手段を設けた第３面とを有し、前記第２
のプリズムは、前記第１のプリズムと空気層を形成する
第１面と、前記第３のプリズムと空気層を形成する第２
面と、前記光源からの照明光が入射する第３面とを有
し、前記第３のプリズムは、前記第２のプリズムと空気
層を形成する第１面と、前記ライトバルブからの反射光
が出射し、かつ前記第１面と平行な第２面と、第３面と
を有する投写型表示装置である。A projection display device according to the present invention (corresponding to the invention according to claim 6) includes a light source, a light valve, a compound prism, and a projection lens, and the light valve is a reflection type. And a light distribution correction element that forms an image by controlling the traveling direction of light in accordance with a video signal. The composite prism includes a first prism and a second prism in order from the light valve side. And a third prism, wherein a thin air layer is provided between the first prism and the second prism, and between the second prism and the third prism. The three prisms are triangular prisms, and the first prism is
A first surface that is close to the light valve, a second surface that forms the air layer between the second prism, and light reflected from the light valve incident thereon, and is a polished surface or a mirror surface; and A third surface provided with light absorbing means;
The first prism has a first surface forming an air layer with the first prism, and the second prism has a second surface forming an air layer with the third prism.
A third surface on which illumination light from the light source is incident, wherein the third prism has a first surface forming an air layer with the second prism, and reflected light from the light valve. Is a projection display device having a second surface parallel to the first surface and a third surface.
【０００９】又、本発明のプリズム装置（請求項８記載
の発明に対応）は、ライトバルブと、第１ないし第３の
３つのプリズムと、２つの貼り合わせ透明板とを具備
し、前記ライトバルブ側から順に、前記第１のプリズ
ム、第１の貼り合わせ透明板、前記第２のプリズム、第
２の貼り合わせ透明板、及び前記第３のプリズムが配置
されており、前記２つの貼り合わせ透明板は、それぞれ
前記３つのプリズムと屈折率が実質上等しい第１の透明
板と第２の透明板とを空気間隙を設けて周辺部を結合し
たものであり、かつ近接する前記プリズムと透明接着剤
で接合されており、前記第１のプリズムは、前記ライト
バルブに近接する第１面と、前記第１の貼り合わせ透明
板と接合されている第２面と、前記ライトバルブからの
反射光が入射する第３面とを有し、前記第２のプリズム
は、前記第１の貼り合わせ透明板と接合されている第１
面と、前記第２の貼り合わせ透明板と接合されている第
２面と、光が入射する第３面とを有し、前記第３のプリ
ズムは、前記第２の貼り合わせ透明板と接合されている
第１面と、前記ライトバルブからの反射光が出射し、か
つ前記第１のプリズムの第１面と平行な第２面と、第３
面とを有するプリズム装置である。Further, a prism device of the present invention (corresponding to the invention of claim 8) comprises a light valve, first to third three prisms, and two bonded transparent plates, The first prism, the first bonded transparent plate, the second prism, the second bonded transparent plate, and the third prism are arranged in this order from the valve side. The transparent plate comprises a first transparent plate and a second transparent plate, each having a refractive index substantially equal to that of the three prisms, and a peripheral portion of the first and second transparent plates provided with an air gap therebetween. The first prism is bonded with an adhesive, and the first prism has a first surface close to the light valve, a second surface bonded to the first bonded transparent plate, and a reflection from the light valve. The third where light enters Has the door, the second prism, the first being joined to the first bonding transparent plate
Surface, a second surface joined to the second bonded transparent plate, and a third surface on which light is incident, wherein the third prism is bonded to the second bonded transparent plate. A first surface, a second surface parallel to the first surface of the first prism, from which reflected light from the light valve is emitted, and a third surface.
And a prism device having a surface.
【００１０】又、本発明の投写型表示装置（請求項１５
記載の発明に対応）は、光源と、ライトバルブと、複合
プリズムと、投写レンズとを具備しており、前記ライト
バルブは反射型であり、映像信号に応じて光の進行方向
を制御することにより画像を形成する配光補正素子であ
り、前記複合プリズムは、第１ないし第３の３つのプリ
ズムと、２つの貼り合わせ透明板とを具備し、前記ライ
トバルブ側から順に、前記第１のプリズム、第１の貼り
合わせ透明板、前記第２のプリズム、第２の貼り合わせ
透明板、及び前記第３のプリズムが配置されており、前
記２つの貼り合わせ透明板は、それぞれ前記３つのプリ
ズムと屈折率が実質上等しい第１の透明板と第２の透明
板とを空気間隙を設けて周辺部を結合したものであり、
かつ近接する前記プリズムと透明接着剤で接合されてお
り、前記第１のプリズムは、ライトバルブに近接する第
１面と、前記第１の貼り合わせ透明板と接合されている
第２面と、前記ライトバルブからの反射光が入射し、研
磨面又は鏡面であり、かつ光吸収手段を設けた第３面と
を有し、前記第２のプリズムは、前記第１の貼り合わせ
透明板と接合されている第１面と、前記第２の貼り合わ
せ透明板と接合されている第２面と、前記光源からの照
明光が入射する第３面とを有し、前記第３のプリズム
は、前記第２の貼り合わせ透明板と接合されている第１
面と、前記ライトバルブからの反射光が出射し、かつ前
記第１のプリズムの第１面と平行な第２面と、第３面と
を有する投写型表示装置である。Further, the projection type display device of the present invention (claim 15)
The present invention includes a light source, a light valve, a compound prism, and a projection lens, wherein the light valve is a reflection type, and controls a traveling direction of light according to a video signal. Wherein the composite prism includes first to third three prisms and two bonded transparent plates, and the first prism is arranged in order from the light valve side. A prism, a first bonded transparent plate, the second prism, a second bonded transparent plate, and the third prism are arranged, and the two bonded transparent plates are each provided with the three prisms. The first transparent plate and the second transparent plate having substantially the same refractive index as the first transparent plate and the second transparent plate are provided with an air gap therebetween and their peripheral portions are combined,
And the first prism is bonded to the adjacent prism with a transparent adhesive, and the first prism has a first surface adjacent to the light valve, a second surface bonded to the first bonded transparent plate, The light reflected from the light valve is incident thereon, has a polished surface or a mirror surface, and has a third surface provided with light absorbing means. The second prism is bonded to the first bonded transparent plate. A first surface, a second surface joined to the second bonded transparent plate, and a third surface on which illumination light from the light source is incident, and the third prism includes: The first bonded to the second bonded transparent plate
A projection display device having a surface, a second surface parallel to the first surface of the first prism, from which light reflected from the light valve is emitted, and a third surface.
【００１１】又、本発明のプリズム装置（請求項１７記
載の発明に対応）は、ライトバルブと、枠体と、第１の
貼り合わせ透明板と、第２の貼り合わせ板と、光入射窓
または光出射窓となる第１の窓と、光入射窓または光出
射窓となる第２の窓と、光入射窓または光出射窓となる
第３の窓と、光吸収手段とを具備し、前記枠体と、前記
２つの貼り合わせ透明板と、前記第１ないし第３の窓
と、前記光吸収手段とで構成される密閉容器中に、少な
くとも注入時に液体状の透明材料が充填されて全体とし
てプリズム状をなしており、前記２つの貼り合わせ透明
板は、それぞれ前記透明材料と屈折率が実質上等しい第
１の透明板と第２の透明板とを空気間隙を設けて周辺部
を結合したものであるプリズム装置である。The prism device of the present invention (corresponding to claim 17) comprises a light valve, a frame, a first bonded transparent plate, a second bonded plate, and a light entrance window. Or a first window serving as a light exit window, a second window serving as a light entrance window or a light exit window, a third window serving as a light entrance window or a light exit window, and light absorbing means, A liquid transparent material is filled in at least at the time of injection into a closed container constituted by the frame, the two bonded transparent plates, the first to third windows, and the light absorbing means. The two bonded transparent plates have a prism shape as a whole, and the two bonded transparent plates are provided with an air gap between the first transparent plate and the second transparent plate having substantially the same refractive index as the transparent material to form a peripheral portion. It is a prism device that is combined.
【００１２】又、本発明の投写型表示装置（請求項２３
記載の発明に対応）は、光源と、ライトバルブと、プリ
ズム体と、投写レンズとを具備しており、前記ライトバ
ルブは反射型であり、映像信号に応じて光の進行方向を
制御することにより画像を形成する配光補正素子であ
り、前記プリズム体は、枠体と、第１の貼り合わせ透明
板と、第２の貼り合わせ板と、光入射窓、または光出射
窓となる第１ないし第３の窓と、光吸収手段とを具備
し、前記枠体と、前記２つの貼り合わせ透明板と、前記
３つの光入射窓、または光出射窓と、前記光吸収手段と
で構成される密閉容器中に、少なくとも注入時に液体状
の透明材料が充填されて全体としてプリズム状をなして
おり、前記２つの貼り合わせ透明板は、それぞれ前記透
明材料と屈折率が実質上等しい第１の透明板と第２の透
明板とを空気間隙を設けて周辺部を結合したものである
投写型表示装置である。Further, the projection type display device of the present invention (claim 23)
The present invention includes a light source, a light valve, a prism body, and a projection lens, wherein the light valve is a reflection type, and controls a traveling direction of light according to a video signal. Wherein the prism body includes a frame, a first bonded transparent plate, a second bonded plate, and a first light entrance window or a first light exit window. Or a third window, a light absorbing means, and is constituted by the frame, the two bonded transparent plates, the three light incident windows or the light emitting windows, and the light absorbing means. A liquid transparent material is filled at least at the time of injection into an airtight container, and the whole is in the form of a prism. The two bonded transparent plates have a first refractive index substantially equal to that of the transparent material. An air gap is provided between the transparent plate and the second transparent plate. A projection display device is obtained by combining the periphery Te.
【００１３】又、本発明のプリズム装置（請求項２５記
載の発明に対応）は、光の進行方向を所定の映像信号に
応じて制御するライトバルブと、光源から入射してくる
光を前記ライトバルブに向けて出射する第２のプリズム
と、前記ライトバルブにより制御された光の内、不要光
が前記第２のプリズムに入射することを抑制する、前記
ライトバルブと前記第２のプリズムとの間に設けられた
第１のプリズムとを備え、前記第１のプリズムと前記第
２のプリズムの間に所定の空気層が設けられているプリ
ズム装置である。The prism device of the present invention (corresponding to the invention according to claim 25) includes a light valve for controlling a traveling direction of light according to a predetermined video signal, and a light valve for transmitting light incident from a light source. A second prism that emits light toward the bulb, and a light valve and the second prism that suppress unnecessary light from entering the second prism, out of light controlled by the light valve. A prism device including a first prism provided therebetween, and a predetermined air layer provided between the first prism and the second prism.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施の形態につい
て、図１から図６を用いて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.
【００１５】（実施の形態１）図１は本発明のプリズム
装置の一実施の形態における全反射プリズムの構成を示
したものであり、同図を参照しならが、本実施の形態の
構成及び動作を述べる。(Embodiment 1) FIG. 1 shows the configuration of a total reflection prism in an embodiment of the prism apparatus of the present invention. Referring to FIG. The operation will be described.
【００１６】同図において、３１は、ライトバルブとし
ての配光補正素子、５１はプリズム装置としての全反射
プリズムである。In FIG. 1, reference numeral 31 denotes a light distribution correction element as a light valve, and reference numeral 51 denotes a total reflection prism as a prism device.
【００１７】また、全反射プリズム５１は、配光補正素
子３１側から順に、第１プリズム３２、第２プリズム３
３、第３プリズム３４の３個の三角プリズムで構成され
ている。それぞれのプリズム間には薄い空気層４４、４
５が形成されている。プリズムの材質はいずれも光学ガ
ラスを用い、屈折率は１．５１６である。The total reflection prism 51 includes a first prism 32 and a second prism 3 in order from the light distribution correction element 31 side.
The third and third prisms 34 are composed of three triangular prisms. A thin air layer 44, 4 between each prism
5 are formed. Each of the prisms is made of optical glass and has a refractive index of 1.516.
【００１８】第１のプリズムは３２は配光補正素子３１
に近接する第１面３５と、第２のプリズム３３との間に
空気層４４を形成し、配光補正素子３１から画像形成光
の光学軸４７に対して２θ1の屈折角で反射される不要
反射光４８を全反射する第２面３６と、不要反射光４８
が入射する第３面３７を有する。第２のプリズム３３
は、第１のプリズム３２との間に空気層４４を形成する
第１面３８と、第３のプリズム３４との間に空気層４５
を形成し、照明光４６を全反射して配光補正素子３１へ
プリズム中で屈折角θ１入射させる第２面３９と、照明
光４６が入射する第３面４０を有する。第３のプリズム
３４は、第２のプリズム３３との間に空気層４５を形成
する第１面４１と、配光補正素子３１から反射された画
像光４７が出射する第２面４２と、第２面と直角をなす
第３面４３とを有する。The first prism 32 is a light distribution correction element 31.
An air layer 44 is formed between the first surface 35 and the second prism 33 that are close to each other, and unnecessary light is reflected from the light distribution correction element 31 at a refraction angle of 2θ1 with respect to the optical axis 47 of the image forming light. A second surface 36 that totally reflects the reflected light 48 and an unnecessary reflected light 48
Has a third surface 37 on which light enters. Second prism 33
Is an air layer 45 between a first surface 38 forming an air layer 44 with the first prism 32 and the third prism 34.
And a second surface 39 on which the illumination light 46 is totally reflected to enter the light distribution correction element 31 with a refraction angle θ1 in the prism, and a third surface 40 on which the illumination light 46 is incident. The third prism 34 has a first surface 41 that forms an air layer 45 with the second prism 33, a second surface 42 from which image light 47 reflected from the light distribution correction element 31 exits, It has a third surface 43 perpendicular to the two surfaces.
【００１９】第２プリズム３３は、入射光を配光補正素
子３１に斜めから入射させ、投写画像として用いる光の
光学軸４７が配光補正素子３１と垂直になるように構成
されている。また、第１プリズム３２は反射型パネル３
１からの不要光４８を全反射させ、投写レンズ、及びス
クリーン側に進行させないようにする作用を有する。全
反射プリズム５１全体として、投写光学軸方向で平行平
面とするため、第１プリズム３２の第１面３５と第３プ
リズム３４の第２面４２は、それぞれ配光補正素子３１
の光学像面と平行となるように構成している。The second prism 33 is configured so that the incident light is obliquely incident on the light distribution correction element 31 so that the optical axis 47 of the light used as the projected image is perpendicular to the light distribution correction element 31. Further, the first prism 32 is a reflection type panel 3
This has the function of totally reflecting the unnecessary light 48 from 1 and preventing the unnecessary light 48 from traveling to the projection lens and the screen side. Since the total reflection prism 51 as a whole is a plane parallel to the direction of the projection optical axis, the first surface 35 of the first prism 32 and the second surface 42 of the third prism 34 are respectively provided with the light distribution correction element 31.
Is configured to be parallel to the optical image plane.
【００２０】ここで、第１プリズム３２、第２プリズム
３３、第３プリズム３４の屈折率をｎとし、照明光の配
光補正素子３１への空気中の入射角をθ0、プリズム中
の屈折角をθ1とすると、以下の式が成り立つ。Here, the refractive index of the first prism 32, the second prism 33, and the third prism 34 is n, the incident angle of the illumination light to the light distribution correction element 31 in the air is θ0, and the refraction angle in the prism is Is θ1, the following equation is established.
【００２１】[0021]
【数３１】 (Equation 31)
【００２２】又、プリズム中を進行し、空気との界面で
全反射する臨界角θ2は、以下の式で表すことが出来
る。The critical angle θ2 which travels in the prism and totally reflects at the interface with air can be expressed by the following equation.
【００２３】[0023]
【数３２】 (Equation 32)
【００２４】図１に示すように、屈折角２θ1で反射さ
れる不要反射光４８が第１プリズム３２の第２面３６で
全反射されるためには、第１プリズム３２の第１面３５
と第２面３６がなす角度θ3、第２面３６と第３面３７
がなす角度θ4は、以下の条件式を満たす必要がある。As shown in FIG. 1, in order for the unnecessary reflected light 48 reflected at the refraction angle 2θ1 to be totally reflected by the second surface 36 of the first prism 32, the first surface 35 of the first prism 32 is required.
Θ3 between the second surface 36 and the second surface 36, the second surface 36 and the third surface 37
The angle θ4 must satisfy the following conditional expression.
【００２５】[0025]
【数３３】 [Equation 33]
【００２６】[0026]
【数３４】 (Equation 34)
【００２７】（数３３）、（数３４）を満たしていれ
ば、不要反射光４８は全て第２面３６で全反射され、第
３面３７に入射する。第３面３７は研磨面であり、空気
との界面には黒色塗料が塗布され、不要光４８のほとん
ど吸収される。If (Equation 33) and (Equation 34) are satisfied, all unnecessary reflected light 48 is totally reflected by the second surface 36 and is incident on the third surface 37. The third surface 37 is a polished surface, and a black paint is applied to an interface with the air, and almost all unnecessary light 48 is absorbed.
【００２８】プリズムの外面に光吸収塗料を塗着した場
合、境界面への入射角が小さい場合には反射率が低い
が、入射角が大きくなり境界面にすれすれで入射するよ
うな場合には反射率がかなり高くなるという性質があ
る。When the light absorbing paint is applied to the outer surface of the prism, the reflectance is low when the incident angle on the boundary surface is small, but when the incident angle is large and the light is incident on the boundary surface very slightly, the reflectance is low. There is a property that the reflectance is considerably high.
【００２９】図１に示した全反射プリズム５１の場合に
は、配光補正素子３１から出射した不要光４８が第１プ
リズム３２の第３面３７に小さな入射角で入射するた
め、反射率は低い。In the case of the total reflection prism 51 shown in FIG. 1, the unnecessary light 48 emitted from the light distribution correction element 31 is incident on the third surface 37 of the first prism 32 at a small incident angle. Low.
【００３０】また、第２プリズム３３の第２面３９と第
３面４０がなす角度は、照明光４６が第２面３９で全反
射されてプリズム中の屈折角がθ1で配光補正素子側へ
進行するようにするために、以下の条件式を満たす必要
がある。The angle formed between the second surface 39 and the third surface 40 of the second prism 33 is such that the illumination light 46 is totally reflected by the second surface 39, the refraction angle in the prism is θ1, and the light distribution correction element side In order to make progress, the following conditional expression must be satisfied.
【００３１】[0031]
【数３５】 (Equation 35)
【００３２】さらに、第３プリズム３４の第１面４１と
第２面４２がなす角度は、画像形成光が出射する第２面
４２が配光補正素子３１の光学像面、及び第１プリズム
３２の第１面３５と互いに平行とするため、以下の条件
式を満たす必要がある。Further, the angle formed by the first surface 41 and the second surface 42 of the third prism 34 is such that the second surface 42 from which the image forming light is emitted is formed by the optical image surface of the light distribution correction element 31 and the first prism 32. In order to be parallel to the first surface 35, it is necessary to satisfy the following conditional expression.
【００３３】[0033]
【数３６】 [Equation 36]
【００３４】以上の条件式を満たせば効率よく、しかも
不要反射光が全くスクリーン側に進行しない全反射プリ
ズム５１の構成が実現できる。If the above conditional expressions are satisfied, the configuration of the total reflection prism 51 in which the unnecessary reflected light does not travel toward the screen at all can be realized efficiently.
【００３５】次に、この全反射プリズム５１を用いた投
写型表示装置を図２に示す。Next, a projection type display device using the total reflection prism 51 is shown in FIG.
【００３６】ランプと凹面鏡からなる光源６１から放射
される光は、コンデンサレンズ６２、全反射ミラー６
３、フィールドレンズ６４を経て、全反射プリズム５１
に入射する。全反射プリズムは図１に示したように、配
光補正素子３１からの不要反射光のほとんどをプリズム
内部で全反射、及び吸収させ、投写レンズ６５によって
拡大投写される光のみ効率よく出射させることができる
ので、スクリーン（図示せず）上に到達する不要光が無
く、非常に高いコントラストの投写画像を表示できる。 （実施の形態２）図３は本発明のプリズム装置の一実施
の形態における全反射プリズムの構成を示したものであ
り、同図を参照しながら本実施の形態の構成及び動作を
述べる。Light emitted from a light source 61 composed of a lamp and a concave mirror is
3. Through the field lens 64, the total reflection prism 51
Incident on. As shown in FIG. 1, the total reflection prism totally reflects and absorbs most of the unnecessary reflected light from the light distribution correction element 31 inside the prism, and efficiently emits only the light enlarged and projected by the projection lens 65. Therefore, there is no unnecessary light reaching a screen (not shown), and a projection image with very high contrast can be displayed. (Embodiment 2) FIG. 3 shows a configuration of a total reflection prism according to an embodiment of the prism apparatus of the present invention. The configuration and operation of this embodiment will be described with reference to FIG.
【００３７】同図において、７１はライトバルブとして
の配光補正素子、１０１はプリズム装置としての全反射
プリズムである。In the figure, reference numeral 71 denotes a light distribution correction element as a light valve, and 101 denotes a total reflection prism as a prism device.
【００３８】全反射プリズム１０１は、配光補正素子７
１側から順に、第１プリズム７２、第１の貼り合わせ透
明板８７、第２プリズム７３、第２の貼り合わせ透明板
９１、第３プリズム７４が配置されている。材質はいず
れも光学ガラスを用い屈折率は１．５１６である。The total reflection prism 101 includes the light distribution correction element 7
In order from the first side, a first prism 72, a first bonded transparent plate 87, a second prism 73, a second bonded transparent plate 91, and a third prism 74 are arranged. All materials are optical glass and the refractive index is 1.516.
【００３９】第１及び第２の貼り合わせ透明板は、いず
れも２枚の透明基板８４、８５、及び８８、８９の間に
微小な球状ビーズをスペーサとして分散し、周辺を結合
させて薄い空気層８６、９０を形成している。空気層８
６、９６を形成している内面の空気との界面には反射防
止膜が形成されている。In each of the first and second bonded transparent plates, minute spherical beads are dispersed as spacers between two transparent substrates 84, 85, and 88, 89, and the periphery is joined to form thin air. The layers 86 and 90 are formed. Air space 8
An anti-reflection film is formed on the interface between the inner surface and the air forming 6, 96.
【００４０】第１のプリズム７２は配光補正素子７１に
近接する第１面７５と、第１の貼り合わせ透明板８７接
合される第２面７６と、配光補正素子７１からの不要反
射光９３が入射し、空気との界面に光吸収塗料が塗布さ
れている第３面７７を有する。第２のプリズム７３は、
第１の貼り合わせ透明板８７と接合される第１面７８
と、第２の貼り合わせ透明板９１と接合される第２面７
９と、照明光９２が入射する第３面８０を有する。The first prism 72 includes a first surface 75 close to the light distribution correction element 71, a second surface 76 to which the first bonded transparent plate 87 is joined, and unnecessary reflected light from the light distribution correction element 71. 93 is incident, and has a third surface 77 in which a light absorbing paint is applied to an interface with air. The second prism 73 is
First surface 78 bonded to first bonded transparent plate 87
And the second surface 7 joined to the second bonded transparent plate 91
9 and a third surface 80 on which the illumination light 92 is incident.
【００４１】第３のプリズム７４は、第２の貼り合わせ
透明板９１と接合される第１面８１と、配光補正素子７
１から反射された画像光が出射する第２面８２と、第２
面と直角をなす第３面８３とを有する。The third prism 74 includes a first surface 81 joined to the second bonded transparent plate 91 and the light distribution correction element 7.
A second surface 82 from which the image light reflected from the first
It has a third surface 83 perpendicular to the surface.
【００４２】第２プリズム７３、第２の貼り合わせ透明
板９１は、入射光を反射型パネルに斜めから入射させ、
投写画像として用いる光の光学軸が配光補正素子７１と
垂直になるように構成されている。The second prism 73 and the second bonded transparent plate 91 make incident light incident on the reflective panel obliquely,
The optical axis of light used as a projection image is configured to be perpendicular to the light distribution correction element 71.
【００４３】また、第１プリズム７２、第１の貼り合わ
せ透明板８７は、配光補正素子７１からの不要光９３を
全反射させ、投写レンズ、及びスクリーン側に進行させ
ないようにする作用を有する。全反射プリズム１０１全
体として、投写光学軸方向で平行平面とするため、第１
プリズム７２の第１面７５と第３プリズムの第２面８２
は、それぞれ配光補正素子７１の光学像面と平行となる
ように構成している。Further, the first prism 72 and the first bonded transparent plate 87 have a function of totally reflecting the unnecessary light 93 from the light distribution correcting element 71 so as not to travel to the projection lens and the screen side. . Since the total reflection prism 101 as a whole is a plane parallel to the projection optical axis, the first
First surface 75 of prism 72 and second surface 82 of third prism
Are configured to be parallel to the optical image plane of the light distribution correction element 71, respectively.
【００４４】全反射プリズム１０１全体としての各角度
条件は、実施の形態１と同様に、（数３３）〜（数３
６）を満たせば効率よく、しかも不要反射光が全くスク
リーン側に進行しない全反射プリズム５１の構成が実現
できる。As in the first embodiment, the angle conditions of the total reflection prism 101 as a whole are given by (Equation 33) to (Equation 3).
If the condition (6) is satisfied, the configuration of the total reflection prism 51 in which the unnecessary reflected light does not travel toward the screen at all can be realized efficiently.
【００４５】次に、全反射プリズム１０１を用いた投写
型表示装置を図４に示す。Next, a projection type display device using the total reflection prism 101 is shown in FIG.
【００４６】ランプと凹面鏡からなる光源１１１から放
射される光は、コンデンサレンズ１１２、全反射ミラー
１１３、フィールドレンズ１１４を経て、全反射プリズ
ム１０１に入射する。全反射プリズム１０１は図３に示
したように、配光補正素子７１からの不要反射光のほと
んどをプリズム内部で全反射、及び吸収させ、投写レン
ズ１１５によって拡大投写される光のみ効率よく出射さ
せることができるので、スクリーン（図示せず）上に到
達する不要光が無く、非常に高いコントラストの投写画
像を表示できる。 （実施の形態３）図５は本発明のプリズム装置の一実施
の形態における全反射プリズムの構成を示したものであ
り、同図を参照しながら、本実施の形態の構成及び動作
を述べる。Light emitted from a light source 111 composed of a lamp and a concave mirror passes through a condenser lens 112, a total reflection mirror 113, and a field lens 114, and enters the total reflection prism 101. As shown in FIG. 3, the total reflection prism 101 totally reflects and absorbs most of the unnecessary reflected light from the light distribution correction element 71 inside the prism, and efficiently emits only the light enlarged and projected by the projection lens 115. Therefore, there is no unnecessary light reaching a screen (not shown), and a projection image with very high contrast can be displayed. (Embodiment 3) FIG. 5 shows a configuration of a total reflection prism according to an embodiment of the prism apparatus of the present invention. The configuration and operation of this embodiment will be described with reference to FIG.
【００４７】同図において、１２１はライトバルブとし
ての配光補正素子、１４１はプリズム装置としての全反
射プリズムである。In the figure, 121 is a light distribution correction element as a light valve, and 141 is a total reflection prism as a prism device.
【００４８】全反射プリズム１４１は、枠体１２２と入
出射窓となる透明板１２３、１２４、１２５、第１の第
１の貼り合わせ透明板１２９、第２の貼り合わせ透明板
１３３によって密閉容器を形成に、空間部に液体、また
は少なくとも注入時には液体状であり時間の経過ととも
に硬化するゲル等の透明材料１３５を充填する。透明材
料１３５と、入出射窓１２３、１２４、１２５及び貼り
合わせ透明板１２９、１３３に用いる透明板１２６、１
２７、１３０、１３１は略等しい屈折率のものを選択
し、いずれも屈折率は略１．５１である。The total reflection prism 141 forms an airtight container by the frame body 122, the transparent plates 123, 124, 125 serving as the entrance and exit windows, the first first bonded transparent plate 129, and the second bonded transparent plate 133. For the formation, the space is filled with a transparent material 135 such as a liquid, or at least a gel that is liquid at the time of injection and hardens over time. The transparent material 135, the transparent plates 126, 1 used for the entrance / exit windows 123, 124, 125 and the laminated transparent plates 129, 133
27, 130 and 131 are selected to have substantially the same refractive index, and all have a refractive index of approximately 1.51.
【００４９】第１及び第２の貼り合わせ透明板１２９、
１３３は、いずれも２枚の透明基板１２６、１２７、及
び１３０、１３１の間に微小な球状ビーズをスペーサと
して分散し、周辺を結合させて薄い空気層１２８、１３
２を形成している。空気層１２８、１３２を形成してい
る内面の空気との界面には反射防止膜が形成されてい
る。The first and second bonded transparent plates 129,
133 is a thin air layer 128, 13 in which minute spherical beads are dispersed as spacers between two transparent substrates 126, 127, and 130, 131, and the periphery is joined.
2 are formed. An antireflection film is formed on the interface between the inner surface of the air layers 128 and 132 and the air.
【００５０】配光補正素子１２１からの不要反射光１３
７が入射する面は、光吸収面１３４として透明鏡面基板
の空気との界面に光吸収塗料が塗布されている。Unnecessary reflected light 13 from light distribution correction element 121
The surface on which the light 7 enters is coated with a light absorbing paint as a light absorbing surface 134 at the interface between the transparent mirror surface substrate and the air.
【００５１】全反射プリズム１４１全体として、照明光
１３６が全反射プリズム１４１の内部で全反射されて配
光補正素子１２１側に進行し、配光補正１２１からの画
像形成光１３８は透明板１３８から出射し、かつ配光補
正素子１２１からの不要反射光１３７は内部で全反射さ
れて光吸収面１３４に入射するように、各角度条件は、
実施の形態１と同様に、（数３３）〜（数３６）を満た
せば効率よく、しかも不要反射光が全くスクリーン側に
進行しない全反射プリズム１４１の構成が実現できる。As a whole of the total reflection prism 141, the illumination light 136 is totally reflected inside the total reflection prism 141 and proceeds to the light distribution correction element 121, and the image forming light 138 from the light distribution correction 121 is transmitted from the transparent plate 138. Each angle condition is set such that the unnecessary reflected light 137 emitted from the light distribution correction element 121 is totally internally reflected and enters the light absorbing surface 134.
As in the first embodiment, if (Equation 33) to (Equation 36) are satisfied, the configuration of the total reflection prism 141 in which unnecessary reflected light does not travel toward the screen at all can be realized efficiently.
【００５２】全反射プリズム１４１を用いた投写型表示
装置を図６に示す。ランプと凹面鏡からなる光源１５１
から放射される光は、コンデンサレンズ１５２、全反射
ミラー１５３、フィールドレンズ１５４を経て、全反射
プリズム１４１に入射する。全反射プリズム１４１は図
５に示したように、配光補正素子１２１からの不要反射
光のほとんどをプリズム内部で全反射、及び吸収させ、
投写レンズ１５５によって拡大投写される光のみ効率よ
く出射させることができるので、スクリーン（図示せ
ず）上に到達する不要光が無く、非常に高いコントラス
トの投写画像を表示できる。FIG. 6 shows a projection type display device using the total reflection prism 141. Light source 151 consisting of lamp and concave mirror
Is incident on the total reflection prism 141 via the condenser lens 152, the total reflection mirror 153, and the field lens 154. As shown in FIG. 5, the total reflection prism 141 totally reflects and absorbs most of the unnecessary reflected light from the light distribution correction element 121 inside the prism.
Since only the light enlarged and projected by the projection lens 155 can be efficiently emitted, there is no unnecessary light reaching a screen (not shown), and a very high-contrast projected image can be displayed.
【００５３】以上のように本実施の形態は、たとえば、
反射光の方向を制御するライトバルブを用いた投写型表
示装置に使用できる、照明光を全反射させ有効出力光を
透過させるプリズム装置に関するものである。As described above, in the present embodiment, for example,
The present invention relates to a prism device that can be used in a projection display device using a light valve that controls the direction of reflected light and that totally reflects illumination light and transmits effective output light.
【００５４】以上のことから、反射型であり、映像信号
に応じて光の進行方向を制御することにより画像を形成
するライトバルブを用いた投写型表示装置のコントラス
トを向上させることができる。From the above, it is possible to improve the contrast of a projection type display device using a light valve which forms an image by controlling the traveling direction of light according to a video signal.
【００５５】尚、上記実施の形態では、第１〜第３のプ
リズムを備えた全反射プリズム及びそれを利用した投写
型表示装置について述べたが、これに限らず例えば、プ
リズム装置の構成として、第３のプリズムを有しない
で、第１及び第２のプリズムを備えた構成であっても良
い。即ち、この場合のプリズム装置としては、例えば、
光の進行方向を所定の映像信号に応じて制御するライト
バルブと、光源から入射してくる光を前記ライトバルブ
に向けて出射する第２のプリズムと、前記ライトバルブ
により制御された光の内、不要光が前記第２のプリズム
に入射することを抑制する、前記ライトバルブと前記第
２のプリズムとの間に設けられた第１のプリズムとを備
え、前記第１のプリズムと前記第２のプリズムの間に所
定の空気層が設けられている構成とすればよい。In the above-described embodiment, the total reflection prism including the first to third prisms and the projection display device using the same have been described. However, the present invention is not limited to this. A configuration including the first and second prisms without the third prism may be employed. That is, as the prism device in this case, for example,
A light valve that controls the traveling direction of light according to a predetermined video signal, a second prism that emits light coming from a light source toward the light valve, and a light prism that is controlled by the light valve. A first prism provided between the light valve and the second prism for suppressing unnecessary light from being incident on the second prism, wherein the first prism and the second prism are provided. It is sufficient that a predetermined air layer is provided between the prisms.
【００５６】[0056]
【発明の効果】以上述べたところから明らかなように本
発明は、コントラストをより良好にすることが出来ると
いう長所を有する。As is apparent from the above description, the present invention has an advantage that the contrast can be improved.
【図１】本発明の実施の形態１の全反射プリズムの構成
を示す概略構成図FIG. 1 is a schematic configuration diagram illustrating a configuration of a total reflection prism according to a first embodiment of the present invention;
【図２】図１に示した全反射プリズムを用いた投写型表
示装置の概略構成図FIG. 2 is a schematic configuration diagram of a projection display device using the total reflection prism shown in FIG.
【図３】本発明の実施の形態２の全反射プリズムの構成
を示す概略構成図FIG. 3 is a schematic configuration diagram showing a configuration of a total reflection prism according to a second embodiment of the present invention.
【図４】図３に示した全反射プリズムを用いた投写型表
示装置の概略構成図4 is a schematic configuration diagram of a projection display device using the total reflection prism shown in FIG.
【図５】本発明の実施の形態３の全反射プリズムの構成
を示す概略構成図FIG. 5 is a schematic configuration diagram showing a configuration of a total reflection prism according to a third embodiment of the present invention.
【図６】図５に示した全反射プリズムを用いた投写型表
示装置の概略構成図6 is a schematic configuration diagram of a projection display device using the total reflection prism shown in FIG.
【図７】従来の投写型表示装置の構成の一例を示す概略
構成図FIG. 7 is a schematic configuration diagram showing an example of the configuration of a conventional projection display device.
【図８】従来の全反射プリズムの構成の一例を示す概略
構成光製図FIG. 8 is a schematic configuration drawing showing an example of the configuration of a conventional total reflection prism.
６１、１１１、１５１ 光源 ６５、１１５、１５５ 投写レンズ ３１、７１、 １２１ 配光補正素子 ５１、１０１、１４１ 全反射プリズム ３２、７２ 第１プリズム ３３、７３ 第２プリズム ３４、７４ 第３プリズム ８７、９１、１２９、１３３ 貼り合わせ透明板 ４４、４５、８６、９０、１２８、１３２ 空気層 61, 111, 151 Light source 65, 115, 155 Projection lens 31, 71, 121 Light distribution correction element 51, 101, 141 Total reflection prism 32, 72 First prism 33, 73 Second prism 34, 74 Third prism 87, 91, 129, 133 Laminated transparent plate 44, 45, 86, 90, 128, 132 Air layer
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０４Ｎ 9/31 Ｇ０２Ｂ 7/18 Ａ Ｆターム(参考） 2H042 CA01 CA12 CA17 2H043 BA00 5C058 AA18 BA08 EA11 EA12 EA13 EA27 EA51 5C060 AA01 BA03 BC01 EA01 GA01 GB00 HC01 HC09 HC20 JA06 JA17 JB06 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H04N 9/31 G02B 7/18 A F term (Reference) 2H042 CA01 CA12 CA17 2H043 BA00 5C058 AA18 BA08 EA11 EA12 EA13 EA27 EA51 5C060 AA01 BA03 BC01 EA01 GA01 GB00 HC01 HC09 HC20 JA06 JA17 JB06
Claims (25)
ムと、第２のプリズムと、第３のプリズムと、 前記第１のプリズムと前記第２のプリズムとの間、及び
前記第２のプリズムと前記第３のプリズムとの間に設け
られた薄い空気層とを備え、 前記３個のプリズムは三角プリズムであり、 前記第１のプリズムは、前記ライトバルブに近接する第
１面と、前記第２のプリズムとの間に前記空気層を形成
する第２面と、前記ライトバルブからの反射光が入射す
る第３面とを有し、 また、前記第２のプリズムは、前記第１のプリズムとの
間に前記空気層を形成する第１面と、前記第３のプリズ
ムとの間に前記空気層を形成する第２面と、光が入射す
る第３面とを有し、 また、前記第３のプリズムは、前記第２のプリズムとの
間に前記空気層を形成する第１面と、前記ライトバルブ
からの反射光が出射し、かつ前記第１のプリズムの前記
第１面と平行な第２面と、第３面とを有することを特徴
とするプリズム装置。1. A light valve, comprising: a first prism, a second prism, a third prism, and a first prism and a second prism provided in this order from the light valve side. And a thin air layer provided between the second prism and the third prism. The three prisms are triangular prisms, and the first prism is provided on the light valve. A second surface that forms the air layer between the first surface and the second prism, and a third surface on which reflected light from the light valve is incident; A first surface forming the air layer between the first prism and the second surface forming the air layer between the third prism, and a third surface on which light is incident. And a third prism, wherein the third prism is a second prism. A first surface forming the air layer between the rhythm and a second surface parallel to the first surface of the first prism, from which reflected light from the light valve is emitted; and a third surface. A prism device comprising:
を設けた請求項１記載のプリズム装置。2. The prism apparatus according to claim 1, wherein light absorbing means is provided on a third surface of said first prism.
鏡面である請求項１記載のプリズム装置。3. The prism device according to claim 1, wherein the third surface of the first prism is a polished surface or a mirror surface.
信号に応じて光の進行方向を制御することにより画像を
形成する配光補正素子であることを特徴とする請求項第
１記載のプリズム装置。4. The prism according to claim 1, wherein the light valve is a reflection type, and is a light distribution correction element that forms an image by controlling a traveling direction of light according to a video signal. apparatus.
場合の照明光の入射角をθ0、光線が空気中から前記プ
リズムに角度θ0入射した場合の前記プリズム中の屈折
角をθ1、前記プリズム中の臨界角をθ2、前記プリズム
の屈折率をｎ、前記第１のプリズムの第１面と第２面と
がなす角度をθ3、前記第１のプリズムの第２面と第３
面とがなす角度をθ4、前記第２のプリズムの第２面と
第３面とがなす角度をθ5、前記第３のプリズムの第１
面と第２とがなす角度をθ6とすると、以下の条件を満
たしていることを特徴とする請求項第４記載のプリズム
装置。 【数１】 【数２】 【数３】 【数４】 【数５】 5. The incident angle of the illumination light when entering the light valve from the air is θ 0 , the refraction angle in the prism when the light beam enters the prism at an angle θ 0 from the air is θ 1 , The critical angle in the prism is θ 2 , the refractive index of the prism is n, the angle between the first surface and the second surface of the first prism is θ 3 , the second surface of the first prism is 3
The angle between the surface and the surface is θ 4 , the angle between the second surface and the third surface of the second prism is θ 5 , the first angle of the third prism is
When a surface and the angle formed second and is to theta 6, the prism device according to claim 4, wherein it meets the following conditions. (Equation 1) (Equation 2) (Equation 3) (Equation 4) (Equation 5)
と、投写レンズとを具備した投写型表示装置であって、 前記ライトバルブは反射型であり、映像信号に応じて光
の進行方向を制御することにより画像を形成する配光補
正素子であり、 前記複合プリズムは、前記ライトバルブ側から順に、第
１のプリズムと、第２のプリズムと、第３のプリズムと
を備え、 前記第１のプリズムと前記第２のプリズムとの間、前記
第２のプリズムと前記第３のプリズムとの間にはそれぞ
れ薄い空気層が設けられ、 前記３つのプリズムは三角プリズムであり、 前記第１のプリズムは、前記ライトバルブに近接する第
１面と、前記第２のプリズムとの間に前記空気層を形成
する第２面と、前記ライトバルブからの反射光が入射
し、研磨面又は鏡面であり、かつ光吸収手段を設けた第
３面とを有し、 前記第２のプリズムは、前記第１のプリズムと空気層を
形成する第１面と、前記第３のプリズムと空気層を形成
する第２面と、前記光源からの照明光が入射する第３面
とを有し、 前記第３のプリズムは、前記第２のプリズムと空気層を
形成する第１面と、前記ライトバルブからの反射光が出
射し、かつ前記第１面と平行な第２面と、第３面とを有
することを特徴とする投写型表示装置。6. A projection display device comprising a light source, a light valve, a compound prism, and a projection lens, wherein the light valve is a reflection type, and controls a traveling direction of light according to a video signal. The composite prism comprises a first prism, a second prism, and a third prism in this order from the light valve side; A thin air layer is provided between the prism and the second prism and between the second prism and the third prism, respectively, the three prisms are triangular prisms, and the first prism Is a first surface adjacent to the light valve, a second surface forming the air layer between the second prism, and a light reflected from the light valve is incident, a polished surface or a mirror surface ,And A second surface forming an air layer with the first prism; and a second surface forming an air layer with the third prism. And a third surface on which illumination light from the light source is incident. The third prism has a first surface forming an air layer with the second prism, and a reflected light from the light valve. A projection display device having a second surface that emits light and is parallel to the first surface, and a third surface.
合の照明光の入射角をθ０、光線が空気中から複合プリ
ズムに角度θ０で入射した場合の前記複合プリズム中の
屈折角をθ１、前記複合プリズム中の臨界角をθ２、前
記３つのプリズムの屈折率をｎ、前記第１のプリズムの
第１面と第２面とがなす角度をθ３、前記第１のプリズ
ムの第２面と第３面とがなす角度をθ４、前記第２のプ
リズムの第２面と第３面とがなす角度をθ５、前記第３
のプリズムの第１面と第２とがなす角度をθ６とする
と、以下の条件を満たしていることを特徴とする請求項
第６記載の投写型表示装置。 【数６】 【数７】 【数８】 【数９】 【数１０】 7. The incident angle of the illumination light when incident on the light valve from the air is θ0, and the refraction angle in the composite prism when the light ray is incident on the composite prism at an angle θ0 from the air is θ1. The critical angle in the compound prism is θ2, the refractive indices of the three prisms are n, the angle between the first surface and the second surface of the first prism is θ3, and the second surface and the second surface of the first prism are θ3. The angle between the three surfaces is θ4, the angle between the second surface and the third surface of the second prism is θ5, and the third angle is the third prism.
7. The projection display device according to claim 6, wherein the following condition is satisfied, assuming that an angle formed between the first surface and the second surface of the prism is θ6. (Equation 6) (Equation 7) (Equation 8) (Equation 9) (Equation 10)
のプリズムと、２つの貼り合わせ透明板とを具備し、 前記ライトバルブ側から順に、前記第１のプリズム、第
１の貼り合わせ透明板、前記第２のプリズム、第２の貼
り合わせ透明板、及び前記第３のプリズムが配置されて
おり、 前記２つの貼り合わせ透明板は、それぞれ前記３つのプ
リズムと屈折率が実質上等しい第１の透明板と第２の透
明板とを空気間隙を設けて周辺部を結合したものであ
り、かつ近接する前記プリズムと透明接着剤で接合され
ており、 前記第１のプリズムは、前記ライトバルブに近接する第
１面と、前記第１の貼り合わせ透明板と接合されている
第２面と、前記ライトバルブからの反射光が入射する第
３面とを有し、 前記第２のプリズムは、前記第１の貼り合わせ透明板と
接合されている第１面と、前記第２の貼り合わせ透明板
と接合されている第２面と、光が入射する第３面とを有
し、 前記第３のプリズムは、前記第２の貼り合わせ透明板と
接合されている第１面と、前記ライトバルブからの反射
光が出射し、かつ前記第１のプリズムの第１面と平行な
第２面と、第３面とを有することを特徴とするプリズム
装置。8. A light valve, first to third three prisms, and two bonded transparent plates, wherein, in order from the light valve side, the first prism and the first bonded transparent plate are provided. A plate, the second prism, a second bonded transparent plate, and the third prism are arranged. The two bonded transparent plates each have a refractive index substantially equal to that of the three prisms. The first transparent plate and the second transparent plate are provided with an air gap therebetween and their peripheral portions are joined, and are joined to the adjacent prism by a transparent adhesive. A second surface having a first surface close to the bulb, a second surface joined to the first bonded transparent plate, and a third surface on which light reflected from the light valve is incident; Is the first bonding A first surface joined to a transparent plate, a second surface joined to the second bonded transparent plate, and a third surface on which light is incident; A first surface joined to the second bonded transparent plate, a second surface parallel to the first surface of the first prism, from which reflected light from the light valve is emitted, and a third surface. A prism device comprising:
防止膜が形成されていることを特徴とする請求項８記載
のプリズム装置。9. The prism device according to claim 8, wherein an antireflection film is formed on an inner surface of the bonded transparent plate.
ペーサとして微細な球状体が分散されていることを特徴
とする請求項８記載のプリズム装置。10. The prism device according to claim 8, wherein fine spherical bodies are dispersed as spacers on the inner surface of the bonded transparent plate.
段を設けたことを特徴とする請求項８記載のプリズム装
置。11. The prism device according to claim 8, wherein light absorbing means is provided on a third surface of said first prism.
は鏡面であることを特徴とする請求項８記載のプリズム
装置。12. The prism device according to claim 8, wherein the third surface of the first prism is a polished surface or a mirror surface.
像信号に応じて光の進行方向を制御することにより画像
を形成する配光補正素子であることを特徴とする請求項
第８記載のプリズム装置。13. The prism according to claim 8, wherein the light valve is a reflection type and is a light distribution correction element for forming an image by controlling a traveling direction of light according to a video signal. apparatus.
る場合の照明光の入射角をθ０、光線が空気中からプリ
ズムに角度θ０で入射した場合の前記プリズム中及び透
明板中の屈折角をθ１、前記プリズム中及び前記透明板
中の臨界角をθ２、前記プリズム及び透明板の屈折率を
ｎ、前記第１のプリズムの第１面と第２面とがなす角度
をθ３、前記第１のプリズムの第２面と第３面とがなす
角度をθ４、前記第２のプリズムの第２面と第３面とが
なす角度をθ５、前記第３のプリズムの第１面と第２と
がなす角度をθ６とすると、以下の条件を満たしている
ことを特徴とする請求項第１３記載のプリズム装置。 【数１１】 【数１２】 【数１３】 【数１４】 【数１５】 14. The incident angle of the illumination light when incident on the light valve from the air is θ0, and the refraction angle in the prism and the transparent plate when the light ray is incident on the prism at an angle θ0 from the air is θ1. The critical angle in the prism and the transparent plate is θ2, the refractive index of the prism and the transparent plate is n, the angle between the first surface and the second surface of the first prism is θ3, the first The angle between the second surface and the third surface of the prism is θ4, the angle between the second surface and the third surface of the second prism is θ5, and the first surface and the second surface of the third prism are 14. The prism device according to claim 13, wherein the following condition is satisfied, assuming that the angle is θ6. [Equation 11] (Equation 12) (Equation 13) [Equation 14] (Equation 15)
と、投写レンズとを具備した投写型表示装置であって、 前記ライトバルブは反射型であり、映像信号に応じて光
の進行方向を制御することにより画像を形成する配光補
正素子であり、 前記複合プリズムは、第１ないし第３の３つのプリズム
と、２つの貼り合わせ透明板とを具備し、 前記ライトバルブ側から順に、前記第１のプリズム、第
１の貼り合わせ透明板、前記第２のプリズム、第２の貼
り合わせ透明板、及び前記第３のプリズムが配置されて
おり、 前記２つの貼り合わせ透明板は、それぞれ前記３つのプ
リズムと屈折率が実質上等しい第１の透明板と第２の透
明板とを空気間隙を設けて周辺部を結合したものであ
り、かつ近接する前記プリズムと透明接着剤で接合され
ており、 前記第１のプリズムは、ライトバルブに近接する第１面
と、前記第１の貼り合わせ透明板と接合されている第２
面と、前記ライトバルブからの反射光が入射し、研磨面
又は鏡面であり、かつ光吸収手段を設けた第３面とを有
し、 前記第２のプリズムは、前記第１の貼り合わせ透明板と
接合されている第１面と、前記第２の貼り合わせ透明板
と接合されている第２面と、前記光源からの照明光が入
射する第３面とを有し、 前記第３のプリズムは、前記第２の貼り合わせ透明板と
接合されている第１面と、前記ライトバルブからの反射
光が出射し、かつ前記第１のプリズムの第１面と平行な
第２面と、第３面とを有することを特徴とする投写型表
示装置。15. A projection display device comprising a light source, a light valve, a compound prism, and a projection lens, wherein the light valve is of a reflection type and controls a traveling direction of light according to a video signal. The composite prism includes first to third three prisms and two bonded transparent plates, and the composite prism includes, in order from the light valve side, The first prism, the first bonded transparent plate, the second prism, the second bonded transparent plate, and the third prism are arranged. A first transparent plate and a second transparent plate having substantially the same refractive index as the two prisms and having a peripheral portion joined by providing an air gap, and being joined to the adjacent prisms by a transparent adhesive. , The first prism has a first surface adjacent to a light valve and a second surface bonded to the first bonded transparent plate.
And a third surface on which light reflected from the light valve is incident, which is a polished surface or a mirror surface, and on which a light absorbing means is provided, wherein the second prism is the first bonded transparent member. A first surface joined to a plate, a second surface joined to the second bonded transparent plate, and a third surface on which illumination light from the light source is incident; A prism, a first surface joined to the second bonded transparent plate, a second surface from which light reflected from the light valve is emitted, and which is parallel to the first surface of the first prism; A projection display device having a third surface.
る場合の照明光の入射角をθ０、光線が空気中からプリ
ズムに角度θ０で入射した場合の前記プリズム中及び透
明板中の屈折角をθ１、前記プリズム中及び前記透明板
中の臨界角をθ２、前記プリズム及び透明板の屈折率を
ｎ、第１のプリズムの第１面と第２面とがなす角度をθ
３、前記第１のプリズムの第２面と第３面とがなす角度
をθ４、第２のプリズムの第２面と第３面とがなす角度
をθ５、第３のプリズムの第１面と第２とがなす角度を
θ６とすると、以下の条件を満たしていることを特徴と
する請求項第１５記載の投写型表示装置。 【数１６】 【数１７】 【数１８】 【数１９】 【数２０】 16. The incident angle of the illumination light when incident on the light valve from the air is θ0, and the refraction angle in the prism and the transparent plate when the light beam is incident on the prism at an angle θ0 from the air is θ1. , The critical angle in the prism and the transparent plate is θ2, the refractive index of the prism and the transparent plate is n, and the angle formed by the first and second surfaces of the first prism is θ.
3. The angle between the second surface and the third surface of the first prism is θ4, the angle between the second surface and the third surface of the second prism is θ5, and the first surface of the third prism is 16. The projection display device according to claim 15, wherein the following condition is satisfied, assuming that an angle formed by the second angle is θ6. (Equation 16) [Equation 17] (Equation 18) [Equation 19] (Equation 20)
合わせ透明板と、第２の貼り合わせ板と、光入射窓また
は光出射窓となる第１の窓と、光入射窓または光出射窓
となる第２の窓と、光入射窓または光出射窓となる第３
の窓と、光吸収手段とを具備し、 前記枠体と、前記２つの貼り合わせ透明板と、前記第１
ないし第３の窓と、前記光吸収手段とで構成される密閉
容器中に、少なくとも注入時に液体状の透明材料が充填
されて全体としてプリズム状をなしており、 前記２つの貼り合わせ透明板は、それぞれ前記透明材料
と屈折率が実質上等しい第１の透明板と第２の透明板と
を空気間隙を設けて周辺部を結合したものであることを
特徴とするプリズム装置。17. A light valve, a frame, a first bonded transparent plate, a second bonded plate, a first window serving as a light entrance window or a light exit window, and a light entrance window or light. A second window serving as an exit window, and a third window serving as a light entrance window or a light exit window.
The frame, the two bonded transparent plates, and the first
Or a third container and a light-absorbing means, the closed container is filled with a liquid transparent material at least at the time of injection to form a prism as a whole, and the two bonded transparent plates are A prism device comprising a first transparent plate and a second transparent plate, each having a refractive index substantially equal to that of the transparent material, and a peripheral portion thereof joined by providing an air gap.
射防止膜が形成されていることを特徴とする請求項１７
記載のプリズム装置。18. An anti-reflection film is formed on an inner surface of the bonded transparent plate.
The prism device according to the above.
ペーサとして微細な球状体が分散されていることを特徴
とする請求項１７記載のプリズム装置。19. The prism device according to claim 17, wherein fine spherical bodies are dispersed as spacers on the inner surface of the bonded transparent plate.
鏡面である透明基板の空気との界面に、黒色塗料を塗布
していることを特徴とする請求項１７記載のプリズム装
置。20. The prism device according to claim 17, wherein the light absorbing means applies a black paint to an interface of the transparent substrate having both polished surfaces or mirror surfaces with air.
像信号に応じて光の進行方向を制御することにより画像
を形成する配光補正素子であることを特徴とする請求項
第１７記載のプリズム装置。21. The prism according to claim 17, wherein the light valve is a reflection type, and is a light distribution correction element that forms an image by controlling a traveling direction of light according to a video signal. apparatus.
る場合の照明光の入射角をθ０、光線が空気中から角度
θ０で入射した場合の透明材料中及び透明板中の屈折角
をθ１、前記透明材料中及び前記透明板中の臨界角をθ
２、前記透明材料及び透明板の屈折率をｎ、第１の窓と
第１の貼り合わせ透明板とがなす角度をθ３、前記第１
の貼り合わせ透明板と前記光吸収手段とがなす角度をθ
４、第２の窓と第２の貼り合わせ透明板とがなす角度を
θ５、前記第２貼り合わせ透明板と第３の窓とがなす角
度をθ６とすると、以下の条件を満たしていることを特
徴とする請求項第２１記載のプリズム装置。 【数２１】 【数２２】 【数２３】 【数２４】 【数２５】 22. An incident angle of the illumination light when incident on the light valve from the air is θ0, and a refraction angle in the transparent material and the transparent plate when the light ray is incident at an angle θ0 from the air is θ1, The critical angle in the transparent material and in the transparent plate is θ
2. The refractive index of the transparent material and the transparent plate is n, the angle between the first window and the first bonded transparent plate is θ3,
The angle formed by the laminated transparent plate and the light absorbing means is θ.
4. Assuming that the angle between the second window and the second bonded transparent plate is θ5, and the angle between the second bonded transparent plate and the third window is θ6, the following conditions are satisfied. 22. The prism device according to claim 21, wherein: (Equation 21) (Equation 22) (Equation 23) (Equation 24) (Equation 25)
と、投写レンズとを具備した投写型表示装置であって、 前記ライトバルブは反射型であり、映像信号に応じて光
の進行方向を制御することにより画像を形成する配光補
正素子であり、 前記プリズム体は、枠体と、第１の貼り合わせ透明板
と、第２の貼り合わせ板と、光入射窓、または光出射窓
となる第１ないし第３の窓と、光吸収手段とを具備し、 前記枠体と、前記２つの貼り合わせ透明板と、前記３つ
の光入射窓、または光出射窓と、前記光吸収手段とで構
成される密閉容器中に、少なくとも注入時に液体状の透
明材料が充填されて全体としてプリズム状をなしてお
り、 前記２つの貼り合わせ透明板は、それぞれ前記透明材料
と屈折率が実質上等しい第１の透明板と第２の透明板と
を空気間隙を設けて周辺部を結合したものであることを
特徴とする投写型表示装置。23. A projection display device comprising a light source, a light valve, a prism body, and a projection lens, wherein the light valve is a reflection type, and controls a traveling direction of light according to a video signal. The prism body becomes a frame, a first bonded transparent plate, a second bonded plate, and a light incident window or a light emitting window. The frame includes first to third windows and light absorbing means, and the frame, the two bonded transparent plates, the three light incident windows or light emitting windows, and the light absorbing means. A liquid transparent material is filled at least at the time of injection into a closed container that is configured to form a prism shape as a whole, and the two bonded transparent plates each have a refractive index substantially equal to that of the transparent material. The first transparent plate and the second transparent plate Projection display device, characterized in that is obtained by combining the periphery is provided an air gap.
る場合の照明光の入射角をθ０、光線が空気中から角度
θ０で入射した場合の透明材料中及び透明板中の屈折角
をθ１、前記透明材料中及び前記透明板中の臨界角をθ
２、前記透明材料及び透明板の屈折率をｎ、前記第１の
窓と第１の貼り合わせ透明板とがなす角度をθ３、前記
第１の貼り合わせ透明板と前記光吸収手段とがなす角度
をθ４、前記第２の窓と第２の貼り合わせ透明板とがな
す角度をθ５、前記第２貼り合わせ透明板と前記第３の
窓とがなす角度をθ６とすると、以下の条件を満たして
いることを特徴とする請求項第２３記載のプリズム装
置。 【数２６】 【数２７】 【数２８】 【数２９】 【数３０】 24. The incident angle of the illuminating light when entering the light valve from the air is θ0, and the refraction angle in the transparent material and the transparent plate when the light ray enters the light valve at an angle θ0 from the air is θ1, The critical angle in the transparent material and in the transparent plate is θ
2. The refractive index of the transparent material and the transparent plate is n, the angle between the first window and the first bonded transparent plate is θ3, and the first bonded transparent plate and the light absorbing means form Assuming that the angle is θ4, the angle between the second window and the second bonded transparent plate is θ5, and the angle between the second bonded transparent plate and the third window is θ6, the following conditions are satisfied. 24. The prism device according to claim 23, wherein the prism device is satisfied. (Equation 26) [Equation 27] [Equation 28] (Equation 29) [Equation 30]
て制御するライトバルブと、 光源から入射してくる光を前記ライトバルブに向けて出
射する第２のプリズムと、 前記ライトバルブにより制御された光の内、不要光が前
記第２のプリズムに入射することを抑制する、前記ライ
トバルブと前記第２のプリズムとの間に設けられた第１
のプリズムとを備え、 前記第１のプリズムと前記第２のプリズムの間に所定の
空気層が設けられていることを特徴とするプリズム装
置。25. A light valve for controlling a traveling direction of light in accordance with a predetermined video signal, a second prism for emitting light incident from a light source toward the light valve, and controlled by the light valve. A first light source provided between the light valve and the second prism for suppressing unnecessary light from being incident on the second prism among the light that has been emitted.
A prism apparatus, comprising: a prism; and a predetermined air layer provided between the first prism and the second prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10173665A JP2000010045A (en) | 1998-06-19 | 1998-06-19 | Prism device and projection type display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10173665A JP2000010045A (en) | 1998-06-19 | 1998-06-19 | Prism device and projection type display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000010045A true JP2000010045A (en) | 2000-01-14 |
Family
ID=15964838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10173665A Pending JP2000010045A (en) | 1998-06-19 | 1998-06-19 | Prism device and projection type display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000010045A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6454417B1 (en) | 1999-03-05 | 2002-09-24 | Minolta Co., Ltd. | Projection optical system comprising an optical function surface for reflecting or transmitting light from a spatial light modulator |
| EP1263222A2 (en) * | 2001-05-30 | 2002-12-04 | Fuji Photo Optical Co., Ltd. | Projector device |
| JP2002365722A (en) * | 2001-06-07 | 2002-12-18 | Matsushita Electric Ind Co Ltd | Projection type image display device |
| KR100381262B1 (en) * | 2000-08-10 | 2003-04-26 | 엘지전자 주식회사 | Total Internal Reflection Prism System using the Digital Micromirror Device |
| JP2005148464A (en) * | 2003-11-17 | 2005-06-09 | Matsushita Electric Ind Co Ltd | Projection type image display device |
| JP2005352080A (en) * | 2004-06-09 | 2005-12-22 | Fujinon Corp | Total reflection prism for projector |
| JP2006292837A (en) * | 2005-04-06 | 2006-10-26 | Matsushita Electric Ind Co Ltd | Projection type display device |
| DE102005061182A1 (en) * | 2005-12-21 | 2007-06-28 | Carl Zeiss Jena Gmbh | Lighting arrangement for color picture projection, has optical path, which impinges on image generating units for illumination in two different directions, and image generating units combined to common projection optical path |
| JP2009258648A (en) * | 2008-03-19 | 2009-11-05 | Seiko Epson Corp | Illumination apparatus, projector, and illumination method |
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| US7774828B2 (en) | 2003-03-31 | 2010-08-10 | Alcatel-Lucent Usa Inc. | Methods for common authentication and authorization across independent networks |
| JPWO2016140105A1 (en) * | 2015-03-04 | 2017-12-07 | コニカミノルタ株式会社 | Optical unit and projector provided with the same |
| CN108292088A (en) * | 2015-12-04 | 2018-07-17 | 柯尼卡美能达株式会社 | Projection type image display apparatus and its design method |
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-
1998
- 1998-06-19 JP JP10173665A patent/JP2000010045A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6454417B1 (en) | 1999-03-05 | 2002-09-24 | Minolta Co., Ltd. | Projection optical system comprising an optical function surface for reflecting or transmitting light from a spatial light modulator |
| KR100381262B1 (en) * | 2000-08-10 | 2003-04-26 | 엘지전자 주식회사 | Total Internal Reflection Prism System using the Digital Micromirror Device |
| EP1263222A2 (en) * | 2001-05-30 | 2002-12-04 | Fuji Photo Optical Co., Ltd. | Projector device |
| JP2002365722A (en) * | 2001-06-07 | 2002-12-18 | Matsushita Electric Ind Co Ltd | Projection type image display device |
| US7774828B2 (en) | 2003-03-31 | 2010-08-10 | Alcatel-Lucent Usa Inc. | Methods for common authentication and authorization across independent networks |
| JP4543661B2 (en) * | 2003-11-17 | 2010-09-15 | パナソニック株式会社 | Projection-type image display device |
| JP2005148464A (en) * | 2003-11-17 | 2005-06-09 | Matsushita Electric Ind Co Ltd | Projection type image display device |
| JP2005352080A (en) * | 2004-06-09 | 2005-12-22 | Fujinon Corp | Total reflection prism for projector |
| JP2006292837A (en) * | 2005-04-06 | 2006-10-26 | Matsushita Electric Ind Co Ltd | Projection type display device |
| DE102005061182A1 (en) * | 2005-12-21 | 2007-06-28 | Carl Zeiss Jena Gmbh | Lighting arrangement for color picture projection, has optical path, which impinges on image generating units for illumination in two different directions, and image generating units combined to common projection optical path |
| DE102005061182B4 (en) * | 2005-12-21 | 2020-03-19 | Carl Zeiss Jena Gmbh | Illumination device for color image projection |
| JP2009258648A (en) * | 2008-03-19 | 2009-11-05 | Seiko Epson Corp | Illumination apparatus, projector, and illumination method |
| JP2009294639A (en) * | 2008-05-02 | 2009-12-17 | Seiko Epson Corp | Illumination device, projector, and illumination method |
| JPWO2016140105A1 (en) * | 2015-03-04 | 2017-12-07 | コニカミノルタ株式会社 | Optical unit and projector provided with the same |
| CN108292088A (en) * | 2015-12-04 | 2018-07-17 | 柯尼卡美能达株式会社 | Projection type image display apparatus and its design method |
| CN108292088B (en) * | 2015-12-04 | 2020-08-11 | 柯尼卡美能达株式会社 | Projection display device and method for designing the same |
| CN114236742A (en) * | 2021-11-30 | 2022-03-25 | 歌尔光学科技有限公司 | Lens module and electronic equipment |
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