JPH0345586U - - Google Patents

Info

Publication number
JPH0345586U
JPH0345586U JP10744089U JP10744089U JPH0345586U JP H0345586 U JPH0345586 U JP H0345586U JP 10744089 U JP10744089 U JP 10744089U JP 10744089 U JP10744089 U JP 10744089U JP H0345586 U JPH0345586 U JP H0345586U
Authority
JP
Japan
Prior art keywords
video projector
projection lens
trapezoidal
projection
screen
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
Application number
JP10744089U
Other languages
Japanese (ja)
Other versions
JPH079187Y2 (en
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 filed Critical
Priority to JP1989107440U priority Critical patent/JPH079187Y2/en
Publication of JPH0345586U publication Critical patent/JPH0345586U/ja
Application granted granted Critical
Publication of JPH079187Y2 publication Critical patent/JPH079187Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Lenses (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案のビデオプロジエクタの一実施
例を、部分的に断面で示した側面図、第２図は同
実施例の主要素の詳細な構成を示す斜視図、第３
図および第５図はこの主要素に対する光路図、第
４図ａ〜ｄおよび第６図ａ〜ｄは同じくこの主要
素の収差を示す特性図、第７図は従来のビデオプ
ロジエクタの構成を説明するために、部分的に断
面で示した側面図、第８図はこのビデオプロジエ
クタの投射画面例、第９図はこのビデオプロジエ
クタの設置位置を変えて示した側面図、第１０図
はこのビデオプロジエクタの投射画面例である。 １……ビデオプロジエクタ、２……ビデオプロ
ジエクタユニツト、４……投射レンズ、９……ス
クリーン、２０……アナモフイツクレンズ装置、
２１……変形凸シリンドリカルレンズ、２２……
変形凹シリンドリカルレンズ。 FIG. 1 is a partially cross-sectional side view of an embodiment of the video projector of the present invention, FIG. 2 is a perspective view showing the detailed configuration of the main elements of the embodiment, and FIG.
5 and 5 are optical path diagrams for this main element, FIGS. 4 a to d and 6 a to d are characteristic diagrams showing aberrations of this main element, and FIG. 7 shows the configuration of a conventional video projector. For illustrative purposes, FIG. 8 is a side view partially shown in cross section, FIG. 8 is an example of the projection screen of this video projector, FIG. 9 is a side view showing the video projector in a different installation position, and FIG. 10 is is an example of the projection screen of this video projector. 1... Video projector, 2... Video projector unit, 4... Projection lens, 9... Screen, 20... Anamorphic lens cleaning device,
21...Deformed convex cylindrical lens, 22...
Deformed concave cylindrical lens.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 投射レンズを通してビデオプロジエクタユニツ
トの画像を投射するビデオプロジエクタにおいて
、前記投射レンズの前方に前記投射レンズの光軸
がスクリーンに対して斜めであることに起因する
投射画面の台形歪、または逆台形歪を補正する逆
台形特性、または台形特性を有するアナモフイツ
クレンズ装置を設けたことを特徴とするビデオプ
ロジエクタ。 In a video projector that projects an image of a video projector unit through a projection lens, in front of the projection lens there is a trapezoidal distortion or inverted trapezoid of the projection screen due to the optical axis of the projection lens being oblique to the screen. A video projector comprising an anamorphic lens device having an inverted trapezoidal characteristic or a trapezoidal characteristic for correcting distortion.
JP1989107440U 1989-09-13 1989-09-13 Video projector Expired - Lifetime JPH079187Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989107440U JPH079187Y2 (en) 1989-09-13 1989-09-13 Video projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989107440U JPH079187Y2 (en) 1989-09-13 1989-09-13 Video projector

Publications (2)

Publication Number Publication Date
JPH0345586U true JPH0345586U (en) 1991-04-26
JPH079187Y2 JPH079187Y2 (en) 1995-03-06

Family

ID=31656132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989107440U Expired - Lifetime JPH079187Y2 (en) 1989-09-13 1989-09-13 Video projector

Country Status (1)

Country Link
JP (1) JPH079187Y2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008029657A1 (en) * 2006-09-04 2008-03-13 Brother Kogyo Kabushiki Kaisha Image projecting device, and projection lens
JP2011070087A (en) * 2009-09-28 2011-04-07 Hitachi Consumer Electronics Co Ltd Projection image display device
JP2013088817A (en) * 2011-10-18 2013-05-13 Young Optics Inc Projection system used in vehicle
WO2024075228A1 (en) * 2022-10-05 2024-04-11 日精テクノロジー株式会社 Projection optical system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6221384A (en) * 1985-07-19 1987-01-29 Matsushita Electric Ind Co Ltd Video projector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6221384A (en) * 1985-07-19 1987-01-29 Matsushita Electric Ind Co Ltd Video projector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008029657A1 (en) * 2006-09-04 2008-03-13 Brother Kogyo Kabushiki Kaisha Image projecting device, and projection lens
JP2011070087A (en) * 2009-09-28 2011-04-07 Hitachi Consumer Electronics Co Ltd Projection image display device
JP2013088817A (en) * 2011-10-18 2013-05-13 Young Optics Inc Projection system used in vehicle
WO2024075228A1 (en) * 2022-10-05 2024-04-11 日精テクノロジー株式会社 Projection optical system

Also Published As

Publication number Publication date
JPH079187Y2 (en) 1995-03-06

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