JPH1124164A - Color liquid crystal projector - Google Patents

Color liquid crystal projector

Info

Publication number
JPH1124164A
JPH1124164A JP9178253A JP17825397A JPH1124164A JP H1124164 A JPH1124164 A JP H1124164A JP 9178253 A JP9178253 A JP 9178253A JP 17825397 A JP17825397 A JP 17825397A JP H1124164 A JPH1124164 A JP H1124164A
Authority
JP
Japan
Prior art keywords
liquid crystal
light
image
screen
color
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.)
Withdrawn
Application number
JP9178253A
Other languages
Japanese (ja)
Inventor
Michiro Tsuchida
道郎 土田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RANDATSUKU KK
Original Assignee
RANDATSUKU KK
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 RANDATSUKU KK filed Critical RANDATSUKU KK
Priority to JP9178253A priority Critical patent/JPH1124164A/en
Publication of JPH1124164A publication Critical patent/JPH1124164A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
    • H04N9/3114—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources by using a sequential colour filter producing one colour at a time
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • G02F1/133622—Colour sequential illumination

Landscapes

  • Liquid Crystal (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

PROBLEM TO BE SOLVED: To enhance the illuminance of a projected liquid crystal color image and to attain the simplification of the constitution and the miniaturization of a projector by providing plural reflection mirrors for sequentially reflecting three primary colors of light emitted from a light source, a liquid crystal panel for sequentially displaying a monochromatic image among color images, and a projecting lens for projecting each monochromatic image on a screen. SOLUTION: The rotary reflection mirror 2 for reflecting the light emitted from the light source 1 toward the liquid crystal panel 4 is a regular hexagonal columnar mirror constituted of R, G and B reflection mirrors for reflecting light of red, green and blue colors among three primary colors, respectively. Each R, G and B image displayed on the liquid crystal panel 4 in time-division manner is projected through the projecting lens 7 with time-synchronized light reflected by the rotary reflection mirror 2. The color image 8 such as each R, G and B image successively displayed on the liquid crystal panel 4 through which light of a specified wavelength and reflected by each R, G and B mirror face of the rotary reflection mirror 2 passes is successively projected on the screen 10 by the reflection of the rotary reflection mirror 2. The images appear in an overlapped state within an afterimage time, then, the color image is obtained on the screen.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】この発明は、反射鏡式のカラ
ー液晶投影装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflecting mirror type color liquid crystal projector.

【０００２】[0002]

【従来の技術】従来のカラー液晶投影装置としては、主
として、光の３原色分解方式のものか、カラー液晶板を
用いた方式のものが使用されている。2. Description of the Related Art As a conventional color liquid crystal projection apparatus, a three-primary-color separation system of light or a system using a color liquid crystal plate is mainly used.

【０００３】[0003]

【発明が解決しようとする課題】しかし、３原色分解方
式のものは、単板液晶を３枚必要とし、単一光源からの
光は、３原色に分解されて各色に対応した液晶板を透過
し、合成されてスクリーン上にカラー画像を投影する。
このため、構成が複雑で、装置が大型になる。However, the three-primary-color separation type requires three single-plate liquid crystals, and light from a single light source is separated into three primary colors and transmitted through the liquid crystal plate corresponding to each color. Then, the image is synthesized and a color image is projected on a screen.
Therefore, the configuration is complicated and the device becomes large.

【０００４】カラー液晶板を用いる方式のものは、単板
液晶でスクリーン上にカラー画像を投影できるが、光の
透過度が低く、僅か数％に過ぎない。このため、スクリ
ーン上に投影される液晶カラー画像の画像の照度が低
い。In a system using a color liquid crystal plate, a color image can be projected on a screen with a single plate liquid crystal, but the light transmittance is low, and it is only a few percent. Therefore, the illuminance of the liquid crystal color image projected on the screen is low.

【０００５】この発明は、このような従来の問題点を解
決するためになされたもので、液晶カラー画像の投影画
像の照度が高く、かつ構成が簡単で小型のカラー液晶投
影装置を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and it is an object of the present invention to provide a small-sized color liquid crystal projector having a simple structure and high illuminance of a projected liquid crystal color image. With the goal.

【０００６】[0006]

【課題を解決するための手段】この発明が提供するカラ
ー液晶投影装置は、光源と、光源からの光の３原色を順
次反射する少なくとも３枚の反射鏡と、各反射鏡に反射
されて透過する光の３原色のそれぞれに対応する、投影
しようとするカラー画像のうちの単色画像を順次表示す
る液晶板と、液晶板に表示された各単色画像をスクリー
ン上に投影する投影レンズとを備えたものである。A color liquid crystal projection apparatus provided by the present invention comprises a light source, at least three reflecting mirrors for sequentially reflecting the three primary colors of light from the light source, and a reflecting mirror for transmitting light. A liquid crystal plate for sequentially displaying monochromatic images of color images to be projected corresponding to each of the three primary colors of light to be projected, and a projection lens for projecting each monochromatic image displayed on the liquid crystal plate onto a screen. It is a thing.

【０００７】上記反射鏡は、多層膜で形成することがで
きる。[0007] The reflecting mirror can be formed of a multilayer film.

【０００８】[0008]

【作用】この発明によれば、目の残像時間内に、光の３
原色の各色の画像をスクリーン上で順次重ねて見ること
ができる。このため、スクリーン上の画像がカラー画像
にみえる。According to the present invention, the light of 3
Images of the primary colors can be sequentially superimposed on the screen. Therefore, the image on the screen looks like a color image.

【０００９】このカラー画像は、投影しようとするカラ
ー画像のうちの３つの単色画像を、それぞれの色に対応
する反射光によってスクリーン上に投影したものである
ので、照度の高い鮮明なものとなる。[0009] This color image is obtained by projecting three monochromatic images of the color image to be projected onto the screen by reflected light corresponding to the respective colors, so that a clear image with high illuminance is obtained. .

【００１０】なお、フィルターを用いても、上記と同様
の効果を得ることができるが、フィルターを構成する材
質の光透過度が影響して、反射鏡を使用するよりも、光
束強度の損失が大となる。Although the same effect as described above can be obtained by using a filter, the light transmittance of the material constituting the filter affects the loss of the luminous flux intensity compared with the use of a reflecting mirror. It will be great.

【００１１】また、１枚の液晶板と少なくとも３枚の反
射鏡でスクリーン上にカラー画像を投影できるので、装
置が簡単かつ小型になる。In addition, since a color image can be projected on a screen by one liquid crystal plate and at least three reflecting mirrors, the apparatus is simple and small.

【００１２】反射鏡を多層膜で形成した場合には、液晶
板に害を与える紫外線と赤外線は反射されない。このた
め、液晶板は紫外線と赤外線から保護される。When the reflecting mirror is formed of a multilayer film, ultraviolet rays and infrared rays that harm the liquid crystal plate are not reflected. Therefore, the liquid crystal plate is protected from ultraviolet rays and infrared rays.

【００１３】[0013]

【発明の実施の形態】以下、この発明の実施の形態を実
施例によって説明する。Embodiments of the present invention will be described below with reference to embodiments.

【００１４】図１は実施例のカラー液晶投影装置の構成
を示す。FIG. 1 shows the configuration of a color liquid crystal projection apparatus according to an embodiment.

【００１５】図において、１は光源、２は光源１からの
光を液晶板４に向けて反射する回転反射鏡である。回転
反射鏡２は、光の３原色のうち、Ｒ（Ｒｅｄ）のみを反
射するＲ反射鏡と、Ｇ（Ｇｒｅｅｎ）のみを反射するＧ
反射鏡と、Ｂ（Ｂｌｕｅ）のみを反射するＢ反射鏡とで
構成された正六角柱の鏡である。各面を形成する鏡面
は、Ｒ，Ｇ，Ｂの各反射鏡となっていて、この順序で左
廻りに６個配置されている。この回転反射鏡２は、中心
軸を通る回転軸３を中心して矢印方向へ（右）回転す
る。Ｍはその駆動モータである。In FIG. 1, reference numeral 1 denotes a light source, and reference numeral 2 denotes a rotary reflecting mirror for reflecting light from the light source 1 toward the liquid crystal plate 4. The rotary reflecting mirror 2 includes an R reflecting mirror that reflects only R (Red) and a G that reflects only G (Green) among the three primary colors of light.
The mirror is a regular hexagonal prism composed of a reflecting mirror and a B reflecting mirror that reflects only B (Blue). The mirrors forming each surface are R, G, and B reflecting mirrors, and six mirrors are arranged counterclockwise in this order. The rotary reflecting mirror 2 rotates (right) in a direction indicated by an arrow about a rotation axis 3 passing through a central axis. M is the drive motor.

【００１６】４は液晶板で、回転反射鏡２のＲ，Ｇ，Ｂ
の各鏡面によって反射される指定波長の光が透過する。
５は光源１に焦点を合わせて配置したフレネルレンズ
で、回転反射鏡２からの反射光を液晶板４に垂直に入射
させ、垂直に透過させるためのものである。Reference numeral 4 denotes a liquid crystal plate, and R, G, B of the rotary reflecting mirror 2
The light of the designated wavelength reflected by each mirror surface is transmitted.
Reference numeral 5 denotes a Fresnel lens arranged so as to be focused on the light source 1, for causing reflected light from the rotary reflecting mirror 2 to be vertically incident on the liquid crystal plate 4 and transmitted vertically.

【００１７】６は投影レンズ７の入射瞳に焦点を合わせ
たフレネルレンズで、液晶板４を透過したＲ，Ｇ，Ｂの
各反射色は、ここで集光されて投影レンズ７に入射され
る。Reference numeral 6 denotes a Fresnel lens focused on the entrance pupil of the projection lens 7, and the R, G, and B reflection colors transmitted through the liquid crystal plate 4 are condensed here and incident on the projection lens 7. .

【００１８】８は投影しようとするカラー画像である。
９は、光の３原色分解を利用してカラー画像８をＲ，
Ｇ，Ｂの各（単色）画像に時分割して順次液晶板４に表
示するとともに、各画像と回転反射鏡２による反射色と
の時間同期をとる制御手段である。Reference numeral 8 denotes a color image to be projected.
Reference numeral 9 designates a color image 8 as R,
This is control means for time-dividing each of the G and B (single color) images and sequentially displaying the images on the liquid crystal plate 4 and time synchronizing each image with the color reflected by the rotary reflecting mirror 2.

【００１９】７は、投影レンズで、液晶板４に時分割表
示されるＲ，Ｇ，Ｂの各画像を、時間同期をとった回転
反射鏡２からの反射光によって、スクリーン１０上に投
影する。Reference numeral 7 denotes a projection lens, which projects each of R, G, and B images time-divisionally displayed on the liquid crystal plate 4 onto the screen 10 by reflected light from the rotating reflecting mirror 2 synchronized with time. .

【００２０】実施例のカラー液晶投影装置は、上述のよ
うな構成となっているので、液晶板４に順次表示される
カラー画像８のＲ，Ｇ，Ｂの各画像は、これと時間同期
をとった回転反射鏡２の反射光によってスクリーン１０
上に順次投影される。順次投影される画像は、目の残像
時間内に、スクリーン１０上に次々と重ねてあらわれる
ので、スクリーン上では、カラー画像となる。Since the color liquid crystal projection device of the embodiment has the above-described configuration, the R, G, and B images of the color image 8 sequentially displayed on the liquid crystal plate 4 are time-synchronized therewith. The screen 10 is generated by the reflected light of the rotating reflecting mirror 2 taken.
Projected on top. The sequentially projected images appear one after another on the screen 10 within the afterimage time of the eyes, and thus become a color image on the screen.

【００２１】このカラー画像は、投影しようとするカラ
ー画像８のうちのＲ，Ｇ，Ｂの各画像を、それぞれの色
に対応する反射光によってスクリーン上に投影したもの
であるので、照度の高い鮮明なものとなる。This color image is obtained by projecting each of the R, G, and B images of the color image 8 to be projected onto the screen by the reflected light corresponding to each color. It will be clear.

【００２２】また、１枚の液晶板４と回転反射鏡２でス
クリーン１０上にカラー画像を投影できるので、装置が
簡単かつ小型になる。Further, since a color image can be projected on the screen 10 by one liquid crystal plate 4 and the rotary reflecting mirror 2, the apparatus is simple and small.

【００２３】なお、上記反射鏡２の各鏡面は多層膜で形
成することができる。このようにすると、液晶板４に害
を与える紫外線と赤外線は反射されないので、液晶板４
を保護することができる。Each mirror surface of the reflecting mirror 2 can be formed by a multilayer film. In this case, since the ultraviolet rays and infrared rays that harm the liquid crystal plate 4 are not reflected, the liquid crystal plate 4 is not reflected.
Can be protected.

【００２４】[0024]

【発明の効果】以上説明したように、この発明によれ
ば、上述のような構成としたので、次の効果を奏する。As described above, according to the present invention, since the above-described configuration is adopted, the following effects are obtained.

【００２５】（１）液晶カラー画像のスクリーン上の投
影画像の照度を高くすることができる。(1) The illuminance of the projected image of the liquid crystal color image on the screen can be increased.

【００２６】（２）装置が簡単で小型になる。(2) The apparatus is simple and compact.

【図面の簡単な説明】[Brief description of the drawings]

【図１】 実施例のカラー液晶投影装置の構成図FIG. 1 is a configuration diagram of a color liquid crystal projection device according to an embodiment.

【符号の説明】[Explanation of symbols]

１ 光源 ２ 回転反射鏡 ３ 回転軸 ４ 液晶板 ５，６ フレネルレンズ ７ 投影レンズ １０ スクリーン DESCRIPTION OF SYMBOLS 1 Light source 2 Rotating reflecting mirror 3 Rotation axis 4 Liquid crystal plate 5, 6 Fresnel lens 7 Projection lens 10 Screen

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 光源と、光源からの光の３原色を順次反
射する少なくとも３枚の反射鏡と、各反射鏡に反射され
て透過する光の３原色のそれぞれに対応する、投影しよ
うとするカラー画像のうちの単色画像を順次表示する液
晶板と、液晶板に表示された各単色画像をスクリーン上
に投影する投影レンズとを備えたカラー液晶投影装置。1. A light source, at least three reflecting mirrors for sequentially reflecting three primary colors of light from the light source, and projections corresponding to each of the three primary colors of light reflected and transmitted by each reflecting mirror. A color liquid crystal projection device comprising: a liquid crystal plate for sequentially displaying monochromatic images of a color image; and a projection lens for projecting each monochromatic image displayed on the liquid crystal plate onto a screen. 【請求項２】 前記反射鏡が多層膜で形成されている請
求項１記載のカラー液晶投影装置。2. The color liquid crystal projection device according to claim 1, wherein said reflecting mirror is formed of a multilayer film.
JP9178253A 1997-07-03 1997-07-03 Color liquid crystal projector Withdrawn JPH1124164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9178253A JPH1124164A (en) 1997-07-03 1997-07-03 Color liquid crystal projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9178253A JPH1124164A (en) 1997-07-03 1997-07-03 Color liquid crystal projector

Publications (1)

Publication Number Publication Date
JPH1124164A true JPH1124164A (en) 1999-01-29

Family

ID=16045271

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9178253A Withdrawn JPH1124164A (en) 1997-07-03 1997-07-03 Color liquid crystal projector

Country Status (1)

Country Link
JP (1) JPH1124164A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001049042A1 (en) * 1999-12-24 2001-07-05 Koninklijke Philips Electronics N.V. Color projection system
WO2001077737A1 (en) * 2000-04-05 2001-10-18 Matsushita Electric Industrial Co., Ltd. Color image display apparatus
US6508554B2 (en) 2000-06-12 2003-01-21 Matsushita Electric Industrial Co., Ltd. Projection-type image display apparatus
US6511184B2 (en) 2000-04-05 2003-01-28 Matsushita Electric Industrial Co., Ltd. Color image display apparatus
US6568811B2 (en) 2000-06-12 2003-05-27 Matsushita Electric Industrial Co., Ltd. Color image display device and projection-type image display apparatus
WO2003046640A1 (en) * 2001-11-27 2003-06-05 Matsushita Electric Industrial Co., Ltd. Single-panel projection type image display apparatus
CN100395634C (en) * 2004-08-07 2008-06-18 鸿富锦精密工业（深圳）有限公司 Backlight module
CN102998883A (en) * 2011-09-08 2013-03-27 孔子龙 Partitioned projector
CN106406004A (en) * 2016-12-12 2017-02-15 广景视睿科技（深圳）有限公司 Curved-surface wavelength conversion system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001049042A1 (en) * 1999-12-24 2001-07-05 Koninklijke Philips Electronics N.V. Color projection system
WO2001077737A1 (en) * 2000-04-05 2001-10-18 Matsushita Electric Industrial Co., Ltd. Color image display apparatus
US6511184B2 (en) 2000-04-05 2003-01-28 Matsushita Electric Industrial Co., Ltd. Color image display apparatus
US6508554B2 (en) 2000-06-12 2003-01-21 Matsushita Electric Industrial Co., Ltd. Projection-type image display apparatus
US6568811B2 (en) 2000-06-12 2003-05-27 Matsushita Electric Industrial Co., Ltd. Color image display device and projection-type image display apparatus
WO2003046640A1 (en) * 2001-11-27 2003-06-05 Matsushita Electric Industrial Co., Ltd. Single-panel projection type image display apparatus
CN100395634C (en) * 2004-08-07 2008-06-18 鸿富锦精密工业（深圳）有限公司 Backlight module
CN102998883A (en) * 2011-09-08 2013-03-27 孔子龙 Partitioned projector
CN106406004A (en) * 2016-12-12 2017-02-15 广景视睿科技（深圳）有限公司 Curved-surface wavelength conversion system
CN106406004B (en) * 2016-12-12 2018-02-09 广景视睿科技（深圳）有限公司 A kind of curved surface Wavelength conversion system
US10481389B2 (en) 2016-12-12 2019-11-19 Iview Displays (Shenzhen) Company Ltd. Curved-surface apparatus for wavelength converting

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Effective date: 20040907