JPH02253291A - Projection type color display device - Google Patents
Projection type color display deviceInfo
- Publication number
- JPH02253291A JPH02253291A JP7610589A JP7610589A JPH02253291A JP H02253291 A JPH02253291 A JP H02253291A JP 7610589 A JP7610589 A JP 7610589A JP 7610589 A JP7610589 A JP 7610589A JP H02253291 A JPH02253291 A JP H02253291A
- Authority
- JP
- Japan
- Prior art keywords
- light
- liquid crystal
- red
- green
- shielding filter
- 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.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims 2
- 239000003086 colorant Substances 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は透過型液晶ライトバルブを用いた投写型カラー
表示装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a projection type color display device using a transmission type liquid crystal light valve.
従来、公開特許公報昭６２−９４８・１８に記載され、
第２図に示されるように、光源から発した白色光を、色
光を分離するダイクロイックミラーにより、青色光、緑
色光、赤色光に分離し、それらの各色光を、偏光板及び
透過型液晶ライトバルブによって変調し、色光を合成す
るダイクロイックミラーにより色合成し、投写レンズに
よって画像をスクリーン上に投写する、投写型カラー表
示装置が知られていた。Conventionally, it was described in the published patent publication Sho 62-948/18,
As shown in Figure 2, the white light emitted from the light source is separated into blue light, green light, and red light by a dichroic mirror that separates colored light, and each color light is divided into a polarizing plate and a transmission type liquid crystal light. 2. Description of the Related Art Projection-type color display devices have been known that modulate color light using a bulb, combine color light using a dichroic mirror, and project an image onto a screen using a projection lens.
しかし従来の技術では、光源から発した白色光を、ダイ
クロイックミラーで色分離する際、青色光には紫外線が
赤色光には赤外線がそれぞれ含まれているため、透過型
液晶ライトバルブより光源側におかれた偏光板のうち、
赤色用の偏向板が赤外線により熱劣下をおこし、青色用
の偏向板が紫外線の化学作用により劣下してしまうとい
う問題点を有していた。However, with conventional technology, when white light emitted from a light source is separated into colors using a dichroic mirror, blue light contains ultraviolet light and red light contains infrared light, so the light source side is separated from the transmissive liquid crystal light valve. Among the polarizing plates placed,
There was a problem in that the red polarizing plate deteriorated due to heat due to infrared rays, and the blue polarizing plate deteriorated due to the chemical action of ultraviolet rays.
よって本発明はこのような問題点を解決するもので、そ
の目的とするところは、偏向板の劣化がおこらない投写
型カラー表示装置を提供するところにある。Therefore, the present invention is intended to solve these problems, and its object is to provide a projection type color display device in which the deflection plate does not deteriorate.
本発明の投写型カラー表示装置は、透過型液晶ライトバ
ルブ、投写光学系、色光を分離、合成するダイクロイッ
クミラー、導光系、光源より構成される投写型カラー表
示装置において、赤外線遮光フィルター及び紫外線遮光
フィルターを、前記光源と前記透過型液晶ライトバルブ
との間の光路内に置くことを特徴とする。The projection color display device of the present invention includes a transmission type liquid crystal light valve, a projection optical system, a dichroic mirror that separates and combines color light, a light guide system, and a light source. A light shielding filter is placed in an optical path between the light source and the transmissive liquid crystal light valve.
以下、本発明の一実施例を図面に沿って説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の投写型カラー表示装置の平面図である
。投写光源１から発した白色光は、紫外線遮光フィルタ
ー２によって紫外線２２（約４００ｎｍ以下の光）が反
射Ｌ７た光路を外れ、赤外線遮光フィルターによって赤
外線３１が吸収され、可視光のみが導光管４内に入射す
る。FIG. 1 is a plan view of a projection type color display device of the present invention. The white light emitted from the projection light source 1 deviates from the optical path where the ultraviolet light 22 (light of about 400 nm or less) is reflected by the ultraviolet light shielding filter 2, the infrared light 31 is absorbed by the infrared light shielding filter, and only the visible light is transmitted to the light guide tube 4. enter inside.
ここで、導光管４内に入射した白色光は、まず青色反射
ダイクロイックミラー５により、青色光（約５００ｎｍ
以下の光）を反射し、その他の光（黄色光）を透過する
。反射した青色光は反射ミラー９により方向を変え、青
色変調液晶ライトバルブＩＯＢに入射する。このとき、
青色変調液晶ライトバルブの光源側に貼付された偏向板
には、約４００ｎｍから約５００ｎｍまでの、紫外線を
含まない青色光が、入射している。Here, the white light incident into the light guide tube 4 is first converted into blue light (approximately 500 nm) by the blue reflecting dichroic mirror 5.
It reflects the following light (yellow light) and transmits other light (yellow light). The reflected blue light changes direction by the reflection mirror 9 and enters the blue modulation liquid crystal light valve IOB. At this time,
Blue light, which does not include ultraviolet rays, from about 400 nm to about 500 nm is incident on the deflection plate attached to the light source side of the blue modulation liquid crystal light valve.
青色反射ダイクロイックミラー５を透過した光は、緑色
反射ダイクロイックミラー６に入射し、緑色光（約５０
０ ｎ ｍから約６００ｎｍの間の光）を反射し、その
他の光である赤色光（約６００ｎｍ以上の光）を透過す
る。反射した緑色は緑色変調液晶ライトバルブ１０ Ｇ
ｔこ入射し、透過した赤色光は、反射ミラー７及び反
射ミラー８により方向を変え、赤色変調液晶ライトバル
ブ１．ＯＲ１ζ入射する。このとき、赤色変調液晶ライ
トバルブの光源側に貼付された偏向板には、約６００
ｎ ｍから約７６０ｎｍまでの、赤外線を含まない赤色
光が、入射している。The light transmitted through the blue reflecting dichroic mirror 5 enters the green reflecting dichroic mirror 6, and the green light (approximately 50
It reflects red light (light between 0 nm and about 600 nm) and transmits other light (light of about 600 nm or more). The reflected green color is a green modulated liquid crystal light bulb 10G.
The red light that enters and passes through the lens changes its direction by a reflecting mirror 7 and a reflecting mirror 8, and then passes through a red modulation liquid crystal light valve 1. OR1ζ is incident. At this time, the deflection plate attached to the light source side of the red modulation liquid crystal light valve has approximately 600
Red light, which does not include infrared radiation, is incident from nm to about 760 nm.
入射した各色光は、赤、青、緑の各色用の信号が加えら
れた各色変調液晶ライトバルブＩＯＲ。The incident color light is modulated by each color liquid crystal light valve IOR to which signals for each color of red, blue, and green are added.
１０Ｂ、ＬＯＧを透過し、ダイクロイックプリズム１１
で合成される。ダイクロイックプリズム１１は、赤反射
面１０Ｒと青反射面１０Ｂが互いに直角になるように構
成されている。10B, transmits LOG, dichroic prism 11
is synthesized with The dichroic prism 11 is configured such that the red reflective surface 10R and the blue reflective surface 10B are at right angles to each other.
このようにして合成されたカラー画像は、投写レンズ１
２によって拡大投写され、スクリーン１３上に表示され
る。The color image synthesized in this way is
2 and displayed on the screen 13.
第３図は、紫外線遮光フィルターの透過特性を表し、第
４図は、赤外線遮光フィルターの透過特性を表している
。また、第５図は投写光源であるキセノンランプの出力
特性である。FIG. 3 shows the transmission characteristics of the ultraviolet light shielding filter, and FIG. 4 shows the transmission characteristics of the infrared light shielding filter. Furthermore, FIG. 5 shows the output characteristics of the xenon lamp which is the projection light source.
２ 以上の図のように、ランプより放射される電磁波の
うち、約７６０ｎｍ以上の波長領域の電磁波である赤外
線３１は、赤外線吸収フィルターで吸収され、約４００
ｎｒｎ以下の波長領域の電磁波である紫外［１３２は、
紫外線遮光フィルターを透過する。2 As shown in the diagram above, among the electromagnetic waves emitted by the lamp, infrared rays 31, which are electromagnetic waves in the wavelength range of about 760 nm or more, are absorbed by the infrared absorption filter and
Ultraviolet [132] is an electromagnetic wave in the wavelength region below nrn.
Transmits ultraviolet light through a filter.
〔実 施 例２〕 以下、本発明の第２の実施例を図面に沿って説明する。[Implementation example 2] A second embodiment of the present invention will be described below with reference to the drawings.
第６図は本発明の投写型カラー表示装置の平面図である
。投写光源６１から発した白色光は導光管６２内に入射
し、導光管６２内に入射した白色管は、まず青色反射ダ
イクロイックミラー６３により、青色光（約５００ｎｍ
以下の光）を反射し、その他の光（黄色光）を透過する
。FIG. 6 is a plan view of the projection type color display device of the present invention. The white light emitted from the projection light source 61 enters the light guide tube 62, and the white light entered into the light guide tube 62 is first converted into blue light (approximately 500 nm) by the blue reflecting dichroic mirror 63.
It reflects the following light (yellow light) and transmits other light (yellow light).
反射した青色光は紫外線透過ミラー６６によって紫外線
３２（約４００ｎｍ以下の光）が透過し光路を外れ、約
４００ｎｍから約５００ｎｍの青色光が反射し方向を変
え、青色変調液晶ライトバルブ６８Ｂに入射する。この
とき、青色変調液晶ライトバルブの光源側に貼付された
偏向板には、約４００ｎｍから約５００ｎｍまでの、紫
外線３２を含まない青色光が、入射している。The reflected blue light passes through the ultraviolet light transmitting mirror 66 as ultraviolet light 32 (light of about 400 nm or less) and leaves the optical path, and the blue light of about 400 nm to about 500 nm is reflected, changes direction, and enters the blue modulation liquid crystal light valve 68B. . At this time, blue light, which does not include ultraviolet rays 32, from about 400 nm to about 500 nm is incident on the deflection plate attached to the light source side of the blue modulation liquid crystal light valve.
青色反射ダイクロイックミラー６３を透過した光は、緑
色反射ダイクロイックミラー６４に入射し、緑色光（約
５００ｎｍから約６００ｎｍの間の光）を反射し、その
他の光である赤色光（約６００ｎｍ以上の光）を透過す
る３反射した緑色光は緑色変調液晶ライトバルブ６８Ｇ
に入射する。The light transmitted through the blue reflective dichroic mirror 63 enters the green reflective dichroic mirror 64, which reflects green light (light between approximately 500 nm and approximately 600 nm) and reflects other red light (light approximately 600 nm or more). ) The reflected green light transmitted through the green modulation liquid crystal light bulb 68G
incident on .
緑色反射ダイクロイックミラー６４を透過した赤色光は
赤外線透過ミラー６５により、約７６０ｎｍ以上の波長
領域の電磁波である赤外線３１を透過し、約６００ｎｍ
から約７６０ｎｍまでの赤色光が、赤外線透過ミラー６
５および反射ミラー６７により反射され、赤色変調液晶
ライトバルブ６８Ｈに入射する。このとき、赤色変調液
晶ライトバルブの光源側に貼付された偏向板には、約６
００ｎｍから約７６０ｎｍまでの、赤外線３１を含まな
い赤色光が、入射している。The red light that has passed through the green reflecting dichroic mirror 64 passes through the infrared rays 31, which is an electromagnetic wave in the wavelength range of approximately 760 nm or more, through the infrared transmitting mirror 65, and the red light passes through the infrared rays 31, which is an electromagnetic wave in the wavelength range of approximately 760 nm or more.
The red light from 760 nm to about 760 nm
5 and reflection mirror 67, and enters a red modulation liquid crystal light valve 68H. At this time, the deflection plate attached to the light source side of the red modulation liquid crystal light valve has approximately 6
Red light from 00 nm to about 760 nm, which does not include infrared rays 31, is incident.
入射した各色光は、赤、青、緑の各色用の信号が加えら
れた各色変調液晶ライトバルブ６８Ｒ１６８Ｂ、６８Ｇ
を透過し、ダイクロイックプリズム６９で合成される。The incident color light is transmitted through each color modulation liquid crystal light valve 68R168B, 68G to which signals for each color of red, blue, and green are added.
are transmitted through the dichroic prism 69 and synthesized.
ダイクロイックプリズム６９１１は、赤反射面６９Ｒと
青反射面６９Ｂが互いに直角になるように構成されてい
る。The dichroic prism 6911 is configured such that the red reflective surface 69R and the blue reflective surface 69B are at right angles to each other.
このようにして合成されたカラー画像は、投写レンズ７
０によって拡大投写され、スクリーン７１上に表示され
る。The color image synthesized in this way is transferred to the projection lens 7.
0 is enlarged and projected and displayed on the screen 71.
本発明の投写型カラー表示装置は、以上説明したように
、光源と透過型液晶ライトバルブとの間に紫外線遮光フ
ィルター及び赤外線遮光フィルターを置く構造にしたこ
とにより、冷却装置の負担を軽減し、装置全体を小型化
し、静粛性を高める効果がある。As explained above, the projection type color display device of the present invention has a structure in which an ultraviolet light shielding filter and an infrared light shielding filter are placed between the light source and the transmission type liquid crystal light valve, thereby reducing the burden on the cooling device. This has the effect of making the entire device smaller and quieter.
第１図は、本発明の投写型カラー表示装置の平面図。
第２図は、従来例の投写型カラー表示装置の平面図。
第３図は、本発明の投写型カラー表示装置に使用した紫
外線遮光フィルターの特性図。
第４図は、本発明の投写型カラー表示装置に使用した赤
外線遮光フィルターの特性図。
第５図は、本発明の投写型カラー表示装置に使用した投
写ランプ（キセノンランプ）の出力特性図。
第６図は、本発明の投写型カラー表示装置の平面図であ
る。
以上
出願人 セイコーエプソン株式会社
代理人 弁理士 鈴 木 喜三部（他１名）第１図
第５図
ふ５３図
第６図FIG. 1 is a plan view of a projection type color display device of the present invention. FIG. 2 is a plan view of a conventional projection type color display device. FIG. 3 is a characteristic diagram of the ultraviolet light shielding filter used in the projection type color display device of the present invention. FIG. 4 is a characteristic diagram of the infrared shielding filter used in the projection type color display device of the present invention. FIG. 5 is an output characteristic diagram of the projection lamp (xenon lamp) used in the projection type color display device of the present invention. FIG. 6 is a plan view of the projection type color display device of the present invention. Applicant Seiko Epson Co., Ltd. Agent Patent Attorney Kizobe Suzuki (and 1 other person) Figure 1 Figure 5 Figure 5 Figure 6
Claims (1)
離、合成するダイクロイックミラー、導光系、光源より
構成される投写型カラー表示装置において、赤外線遮光
フィルター及び紫外線遮光フィルターを、前記光源と前
記透過型液晶ライトバルブとの間の光路内に置くことを
特徴とする投写型カラー表示装置。(1) In a projection type color display device consisting of a transmission type liquid crystal light valve, a projection optical system, a dichroic mirror that separates and combines colored light, a light guiding system, and a light source, an infrared light blocking filter and an ultraviolet light blocking filter are combined with the light source. A projection type color display device, characterized in that it is placed in an optical path between the transmission type liquid crystal light valve and the transmission type liquid crystal light valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7610589A JP2780318B2 (en) | 1989-03-28 | 1989-03-28 | Projection color display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7610589A JP2780318B2 (en) | 1989-03-28 | 1989-03-28 | Projection color display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02253291A true JPH02253291A (en) | 1990-10-12 |
| JP2780318B2 JP2780318B2 (en) | 1998-07-30 |
Family
ID=13595610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7610589A Expired - Lifetime JP2780318B2 (en) | 1989-03-28 | 1989-03-28 | Projection color display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2780318B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05181110A (en) * | 1991-04-30 | 1993-07-23 | Barry Wright Inc | Light or image projecting apparatus |
| US5696564A (en) * | 1995-03-16 | 1997-12-09 | Matsushita Electric Industrial Co., Ltd. | Video projector |
| US5758956A (en) * | 1991-04-30 | 1998-06-02 | Vari-Lite, Inc. | High intensity lighting projectors |
| JP2003084260A (en) * | 2001-09-10 | 2003-03-19 | Tamron Co Ltd | Liquid crystal projector |
| US6769792B1 (en) | 1991-04-30 | 2004-08-03 | Genlyte Thomas Group Llc | High intensity lighting projectors |
| US7497594B2 (en) | 2006-03-28 | 2009-03-03 | Seiko Epson Corporation | Illuminating device and projector |
-
1989
- 1989-03-28 JP JP7610589A patent/JP2780318B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05181110A (en) * | 1991-04-30 | 1993-07-23 | Barry Wright Inc | Light or image projecting apparatus |
| US5691886A (en) * | 1991-04-30 | 1997-11-25 | Vari-Lite, Inc. | Programmable rotatable gobo system |
| US5758956A (en) * | 1991-04-30 | 1998-06-02 | Vari-Lite, Inc. | High intensity lighting projectors |
| US5829868A (en) * | 1991-04-30 | 1998-11-03 | Vari-Lite, Inc. | High intensity lighting projectors |
| US6011640A (en) * | 1991-04-30 | 2000-01-04 | Vari-Lite, Inc. | High intensity lighting projectors |
| US6769792B1 (en) | 1991-04-30 | 2004-08-03 | Genlyte Thomas Group Llc | High intensity lighting projectors |
| US5696564A (en) * | 1995-03-16 | 1997-12-09 | Matsushita Electric Industrial Co., Ltd. | Video projector |
| JP2003084260A (en) * | 2001-09-10 | 2003-03-19 | Tamron Co Ltd | Liquid crystal projector |
| US7497594B2 (en) | 2006-03-28 | 2009-03-03 | Seiko Epson Corporation | Illuminating device and projector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2780318B2 (en) | 1998-07-30 |
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