JPH1124166A - Projection display device - Google Patents
Projection display deviceInfo
- Publication number
- JPH1124166A JPH1124166A JP9179212A JP17921297A JPH1124166A JP H1124166 A JPH1124166 A JP H1124166A JP 9179212 A JP9179212 A JP 9179212A JP 17921297 A JP17921297 A JP 17921297A JP H1124166 A JPH1124166 A JP H1124166A
- Authority
- JP
- Japan
- Prior art keywords
- mirror
- display device
- projection
- projection display
- projection lens
- 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.)
- Pending
Links
Landscapes
- Projection Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は投写型表示装置に係
り、スクリーンに投写される画像の歪曲収差をミラーの
弯曲度を調整して補正するものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection display device, and more particularly to a projection display device which corrects a distortion of an image projected on a screen by adjusting a degree of curvature of a mirror.
【０００２】[0002]
【従来の技術】液晶パネルを用いた投写型表示装置で
は、液晶パネルで生成される画像に幾何学歪みがないの
に、投写レンズの収差等によってスクリーンの画像に歪
曲収差が生じる。この歪曲収差は投写レンズの設計・製
作等によって決まるもので、歪曲収差の低減には多数の
レンズを用いた複雑なレンズ構成および精密な組み立て
を必要とし、コストアップの要因となる。また、歪曲収
差の調整はレンズの設計・組み込み後は不可能である。2. Description of the Related Art In a projection type display device using a liquid crystal panel, there is no geometric distortion in an image generated by the liquid crystal panel, but distortion occurs in an image on a screen due to aberration of a projection lens or the like. The distortion is determined by the design and manufacture of the projection lens, and the reduction of the distortion requires a complicated lens configuration using a large number of lenses and precise assembly, which causes an increase in cost. Adjustment of distortion is not possible after designing and incorporating the lens.
【０００３】[0003]
【発明が解決しようとする課題】本発明はこのような点
に鑑み、投写光学系に部分的に弯曲可能なミラーを配設
し、ミラーの弯曲調整で投写画像の歪曲収差を低減する
ようにし、投写レンズの簡素化およびコストの低減を可
能にすることにある。SUMMARY OF THE INVENTION In view of the foregoing, the present invention provides a projection optical system in which a partially bendable mirror is provided to reduce the distortion of a projected image by adjusting the curvature of the mirror. Another object of the present invention is to simplify the projection lens and reduce the cost.
【０００４】[0004]
【課題を解決するための手段】本発明は上述の課題を解
決するため、映像信号に基づいて生成された画像を投写
レンズでスクリーンに投写する投写型表示装置におい
て、前記投写レンズの後段に部分的に弯曲可能なミラー
を配設し、ミラーの弯曲度の調整により投写画像の歪曲
収差を低減するようにした投写型表示装置を提供するも
のである。According to the present invention, there is provided a projection display apparatus for projecting an image generated on the basis of a video signal onto a screen by a projection lens. It is an object of the present invention to provide a projection display device in which a mirror which can be bent in a curved manner is provided and distortion of a projected image is reduced by adjusting the degree of curvature of the mirror.
【０００５】[0005]
【発明の実施の形態】本発明による投写型表示装置で
は、投写レンズの後段に複数のネジの調整で部分的に弯
曲度を変えられるミラーを配設し、投写レンズ等の歪曲
収差を補正し、スクリーンに投写される画像の歪曲収差
（幾何学歪み）を低減する。調整ネジはミラー取付板に
螺合し、各調整ネジの先端部をミラーの背面にボールジ
ョイントを用いて回動自在に接合する。調整ネジは、ミ
ラーの背面の上辺、下辺、右辺および左辺のそれぞれ中
央部と、四隅と中心とに配設する。DESCRIPTION OF THE PREFERRED EMBODIMENTS In a projection type display apparatus according to the present invention, a mirror which can partially change the degree of curvature by adjusting a plurality of screws is provided at the subsequent stage of the projection lens to correct distortion of the projection lens and the like. And reduces distortion (geometric distortion) of an image projected on a screen. The adjusting screw is screwed to the mirror mounting plate, and the tip of each adjusting screw is rotatably joined to the back of the mirror using a ball joint. The adjusting screws are disposed at the center, the four corners, and the center of the upper, lower, right, and left sides of the rear surface of the mirror.
【０００６】[0006]
【実施例】以下、図面に基づき本発明による投写型表示
装置の実施例を詳細に説明する。図１は本発明による投
写型表示装置の一実施例の要部構成図で、３板式液晶プ
ロジェクタ装置の例である。図の１はメタルハライドラ
ンプ等の光源、２は光源１からの白色光を集光する光源
反射鏡、３は光源光の紫外線および赤外線等をカットす
るコールドフィルタである。４は緑色光を透過し赤・青
色光を反射するダイクロイックミラー、５はミラー、６
は緑色映像信号で駆動され入射される緑色光を変調し緑
色画像光を出力する液晶パネル、７は青色光を透過し赤
色光を反射するダイクロイックミラー、８は赤色映像信
号で駆動され入射される赤色光を変調し赤色画像光を出
力する液晶パネル、９は液晶パネル６よりの緑色画像光
を透過し液晶パネル８よりの赤色画像光を反射するダイ
クロイックミラー、10は青色映像信号で駆動され入射さ
れる青色光を変調し青色画像光を出力する液晶パネル、
11はミラー、12はダイクロイックミラー９からの赤・緑
色画像光を透過しダイクロイックミラー11からの青色画
像光を反射するダイクロイックミラー、13は投写レンズ
である。14はミラーで、部分的に弯曲可能なものであ
る。15はミラー14を取付けるためのミラー取付板で、筐
体内に端部等を固定する。15は調整ネジで、ミラー取付
板15に螺合し、先端部をミラー14の背面に回動自在に接
合する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a projection type display device according to the present invention. FIG. 1 is a configuration diagram of a main part of an embodiment of a projection display apparatus according to the present invention, which is an example of a three-panel liquid crystal projector apparatus. 1 is a light source such as a metal halide lamp or the like, 2 is a light source reflecting mirror for condensing white light from the light source 1, and 3 is a cold filter for cutting off ultraviolet light and infrared light of the light from the light source. 4 is a dichroic mirror that transmits green light and reflects red and blue light, 5 is a mirror, 6
Is a liquid crystal panel that is driven by a green image signal and modulates the incident green light to output green image light, 7 is a dichroic mirror that transmits blue light and reflects red light, and 8 is driven and incident by a red image signal A liquid crystal panel that modulates red light and outputs red image light, 9 is a dichroic mirror that transmits green image light from the liquid crystal panel 6 and reflects red image light from the liquid crystal panel 8, and 10 is driven by a blue image signal and incident. A liquid crystal panel that modulates blue light and outputs blue image light,
Reference numeral 11 denotes a mirror, 12 denotes a dichroic mirror that transmits the red / green image light from the dichroic mirror 9 and reflects the blue image light from the dichroic mirror 11, and 13 denotes a projection lens. 14 is a mirror which can be partially curved. Reference numeral 15 denotes a mirror mounting plate for mounting the mirror 14, which fixes an end or the like in the housing. Reference numeral 15 denotes an adjusting screw which is screwed to the mirror mounting plate 15 and has a tip end rotatably joined to the rear surface of the mirror 14.
【０００７】図２はミラー14の取付部を示す要部側面図
で、部分拡大図に示すように、調整ネジ16はミラー取付
板15に螺合され、先端部をボールジョイント21によりミ
ラー14の背面に接合する。接合には接着剤22を用いる。
調整ネジ16はミラー15の背面の上辺、下辺、右辺および
左辺のそれぞれ中央部と、四隅と中心とに配設し、投写
画像の歪みの状況に応じて適宜の調整ネジを挿抜し、ミ
ラー14を部分的に出っ張らせ、あるいは引き込ませ、投
写画像を歪曲収差のない状態に補正する。FIG. 2 is a side view of a main portion showing a mounting portion of the mirror 14. As shown in a partially enlarged view, an adjusting screw 16 is screwed to a mirror mounting plate 15, and a distal end portion of the mirror 14 is fixed by a ball joint 21. Join to the back. An adhesive 22 is used for joining.
Adjustment screws 16 are provided at the center of each of the upper, lower, right, and left sides of the rear surface of the mirror 15, and at the four corners and the center. Are partially protruded or retracted to correct the projected image to a state free of distortion.
【０００８】図３は調整ネジ16の配設位置の一例で、図
に示す如く、投写レンズ13から遠いＡ側の調整ネジ16の
間隔に対して投写レンズ13から近いＢ側の調整ネジ16の
間隔を狭めて配置する。これは、点線で示すようにミラ
ー14に入射する画像が投写レンズ13からの距離（ａ、
ｂ）の差で台形型になるためで、調整ネジ16をミラー14
に入射される画像の外形形状に対応させて配置すること
により、画像の歪曲収差を的確に補正することができ
る。FIG. 3 shows an example of an arrangement position of the adjustment screw 16. As shown in FIG. 3, the distance between the adjustment screw 16 on the A side far from the projection lens 13 and the adjustment screw 16 on the B side near the projection lens 13 is shown. Arrange them with a smaller interval. This is because the image incident on the mirror 14 is at a distance (a,
The adjustment screw 16 is attached to the mirror 14
By disposing them in accordance with the external shape of the image incident on the image, distortion of the image can be accurately corrected.
【０００９】なお、図４に示すように、筐体31のミラー
14（図示せず）に対応する箇所32をミラーの背面に対向
させて形成し、各調整ネジ16を筐体面に螺合し、先端部
を回動自在にミラーに接合し、筐体外から直接調整でき
るようにしてもよい。[0009] As shown in FIG.
A portion 32 corresponding to 14 (not shown) is formed facing the rear surface of the mirror, each adjusting screw 16 is screwed to the housing surface, and the tip is rotatably joined to the mirror, and directly from the outside of the housing. You may make it adjustable.
【００１０】[0010]
【発明の効果】以上に説明したように、本発明による投
写型表示装置によれば、投写レンズの後段に配設したミ
ラーの弯曲度をネジで調整し、投写レンズ等で生ずる歪
曲収差を吸収し、歪みのない画像をスクリーンに投写す
ることができ、投写レンズのコスト引き下げを可能にす
るものである。As described above, according to the projection type display apparatus of the present invention, the degree of curvature of the mirror disposed downstream of the projection lens is adjusted by the screw, and the distortion generated by the projection lens and the like is absorbed. In addition, an image having no distortion can be projected on the screen, and the cost of the projection lens can be reduced.
【図１】本発明による投写型表示装置の一実施例の要部
構成図である。FIG. 1 is a main part configuration diagram of an embodiment of a projection display apparatus according to the present invention.
【図２】投写レンズの後段に設けるミラーの調整装置の
一例の要部側面図である。FIG. 2 is a side view of a main part of an example of a mirror adjustment device provided at a subsequent stage of a projection lens.
【図３】投写レンズの後段に設けるミラーの調整ネジの
配設位置の一例である。FIG. 3 is an example of an arrangement position of an adjustment screw of a mirror provided at a subsequent stage of the projection lens.
【図４】投写型表示装置の筐体の要部斜視図である。FIG. 4 is a perspective view of a main part of a housing of the projection display device.
１ 光源 ２ 光源反射鏡 ３ コールドフィルタ ４、７、９、12 ダイクロイックミラー ５、11、14 ミラー ６、８、10 液晶パネル 13 投写レンズ 15 ミラー取付板 16 調整ネジ 21 ボールジョイント 22 接着剤 31 筐体 DESCRIPTION OF SYMBOLS 1 Light source 2 Light source reflecting mirror 3 Cold filter 4, 7, 9, 12 Dichroic mirror 5, 11, 14 Mirror 6, 8, 10 Liquid crystal panel 13 Projection lens 15 Mirror mounting plate 16 Adjusting screw 21 Ball joint 22 Adhesive 31 Housing
Claims (6)
写レンズでスクリーンに投写する投写型表示装置におい
て、前記投写レンズの後段に部分的に弯曲可能なミラー
を配設し、ミラーの弯曲度の調整により投写画像の歪曲
収差を低減するようにした投写型表示装置。1. A projection display device for projecting an image generated on the basis of a video signal onto a screen by a projection lens, wherein a partially bendable mirror is disposed downstream of the projection lens, and a degree of curvature of the mirror is provided. Projection type display device in which the distortion of the projected image is reduced by adjusting.
を固定し、ミラー取付板に複数の調整ネジを螺合し、各
調整ネジの先端部を前記ミラーの背面に回動自在に接合
し、調整ネジの挿抜により前記ミラーの弯曲度を調整す
るようにした請求項１記載の投写型表示装置。2. A mirror mounting plate is fixed in a housing of a projection display device, a plurality of adjusting screws are screwed into the mirror mounting plate, and a tip of each adjusting screw is rotatably joined to a back surface of the mirror. 2. The projection display device according to claim 1, wherein the degree of curvature of the mirror is adjusted by inserting and removing an adjusting screw.
筐体部分をミラーの背面に対向させて形成し、筐体に複
数の調整ネジを螺合し、各調整ネジの先端部を前記ミラ
ーの背面に回動自在に接合し、調整ネジの挿抜によりミ
ラーの弯曲度を調整するようにした請求項１記載の投写
型表示装置。3. A projection display device, wherein a housing portion corresponding to the mirror is formed so as to face the rear surface of the mirror, a plurality of adjustment screws are screwed into the housing, and the tip of each adjustment screw is connected to the mirror. 2. The projection type display device according to claim 1, wherein the projection type display device is rotatably joined to a back surface of the mirror, and adjusts a degree of curvature of the mirror by inserting and removing an adjusting screw.
トを介し前記ミラーの背面に接合するようにした請求項
２または請求項３記載の投写型表示装置。4. The projection display device according to claim 2, wherein a tip portion of said adjusting screw is joined to a back surface of said mirror via a ball joint.
背面の上辺、下辺、右辺および左辺のそれぞれ中央部
と、四隅と中心とに回動自在に接合するようにした請求
項２、請求項３または請求項４記載の投写型表示装置。5. The mirror according to claim 2, wherein a tip of said adjusting screw is rotatably joined to a central portion of each of an upper side, a lower side, a right side, and a left side of the rear surface of said mirror, and four corners and a center. A projection display device according to claim 3 or 4.
よび左辺のそれぞれ中央部と四隅とに回動自在に接合す
る前記調整ネジの位置を、前記ミラーに入射される画像
の外形形状に対応させて配置するようにした請求項５記
載の投写型表示装置。6. The position of the adjustment screw rotatably joined to the center and four corners of the upper side, lower side, right side, and left side of the back surface of the mirror corresponds to the outer shape of an image incident on the mirror. 6. The projection display according to claim 5, wherein the projection display is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9179212A JPH1124166A (en) | 1997-07-04 | 1997-07-04 | Projection display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9179212A JPH1124166A (en) | 1997-07-04 | 1997-07-04 | Projection display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1124166A true JPH1124166A (en) | 1999-01-29 |
Family
ID=16061901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9179212A Pending JPH1124166A (en) | 1997-07-04 | 1997-07-04 | Projection display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1124166A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002077777A (en) * | 2000-08-29 | 2002-03-15 | Mitsubishi Electric Corp | Image distortion correction mechanism of projection image display device |
| KR100636090B1 (en) * | 1999-06-11 | 2006-10-19 | 삼성전자주식회사 | LCD Projection System |
| US7303644B2 (en) | 2003-03-10 | 2007-12-04 | Seiko Epson Corporation | Manufacturing method of optical device |
| JP2008287037A (en) * | 2007-05-18 | 2008-11-27 | Mitsubishi Electric Corp | Video distortion correction mechanism for rear projection type video display device and rear projection type video display device |
| JP2010113114A (en) * | 2008-11-06 | 2010-05-20 | Mitsubishi Electric Corp | Rear projection image display |
-
1997
- 1997-07-04 JP JP9179212A patent/JPH1124166A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100636090B1 (en) * | 1999-06-11 | 2006-10-19 | 삼성전자주식회사 | LCD Projection System |
| JP2002077777A (en) * | 2000-08-29 | 2002-03-15 | Mitsubishi Electric Corp | Image distortion correction mechanism of projection image display device |
| US7303644B2 (en) | 2003-03-10 | 2007-12-04 | Seiko Epson Corporation | Manufacturing method of optical device |
| JP2008287037A (en) * | 2007-05-18 | 2008-11-27 | Mitsubishi Electric Corp | Video distortion correction mechanism for rear projection type video display device and rear projection type video display device |
| US8733943B2 (en) | 2007-05-18 | 2014-05-27 | Mitsubishi Electric Corporation | Image distortion correcting mechanism of back-projection image display device and back-projection image display device |
| JP2010113114A (en) * | 2008-11-06 | 2010-05-20 | Mitsubishi Electric Corp | Rear projection image display |
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