JPH0392878U - - Google Patents

Info

Publication number
JPH0392878U
JPH0392878U JP179290U JP179290U JPH0392878U JP H0392878 U JPH0392878 U JP H0392878U JP 179290 U JP179290 U JP 179290U JP 179290 U JP179290 U JP 179290U JP H0392878 U JPH0392878 U JP H0392878U
Authority
JP
Japan
Prior art keywords
screen
infrared light
light
projection
projection device
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
Application number
JP179290U
Other languages
Japanese (ja)
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 JP179290U priority Critical patent/JPH0392878U/ja
Publication of JPH0392878U publication Critical patent/JPH0392878U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Transforming Electric Information Into Light Information (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Description

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

第１図は本考案の一実施例における障害物検出
の動作を模式的に示す図、第２図は赤外線受光部
で受光された赤外線に対応する電気信号を示す図
である。 １……赤外線発光部、２……障害物、４……ス
クリーン、５……赤外線受光部、６……演算・制
御回路、８……液晶パネル、１０……装置本体。 FIG. 1 is a diagram schematically showing the operation of detecting an obstacle in an embodiment of the present invention, and FIG. 2 is a diagram showing an electrical signal corresponding to infrared rays received by an infrared receiving section. 1...Infrared light emitting section, 2...Obstacle, 4...Screen, 5...Infrared light receiving section, 6...Arithmetic/control circuit, 8...Liquid crystal panel, 10...Device main body.

Claims (1)

【実用新案登録請求の範囲】 映像が形成された光レンズを通してスクリーン
に投射する投射型プロジエクシヨン装置において
、 赤外線発光部と、 前記赤外線発光部から発せられ前記スクリーン
又は障害物で反射された赤外線を受光する赤外線
受光部と、 前記スクリーンと前記レンズとの間に障害物が
存在するか否かを判断するために前記赤外線受光
部で受光した赤外線のデータを処理する演算手段
と、 前記演算手段によるデータ処理の結果、前記ス
クリーンと前記レンズとの間に障害物が存在する
と判断した場合は、該プロジエクシヨン装置が３
管式プロジエクシヨン装置のときは投射光を減光
し、液晶プロジエクシヨン装置のときは投射光の
光源として使用しているランプをオフするか又は
液晶パネルを最大黒の状態にするように制御する
制御手段と、 から構成される障害物検出システム。[Claims for Utility Model Registration] A projection type projection device that projects an image onto a screen through a light lens formed thereon, comprising: an infrared light emitting section; and an infrared light emitted from the infrared light emitting section and reflected by the screen or an obstacle. an infrared light receiving section that receives light; a calculation means that processes infrared data received by the infrared light reception section in order to determine whether or not an obstacle exists between the screen and the lens; and the calculation means. As a result of data processing, if it is determined that an obstacle exists between the screen and the lens, the projection device
When using a tube projection device, reduce the projection light, and when using an LCD projection device, turn off the lamp used as the light source for the projection light or set the LCD panel to maximum black. An obstacle detection system comprising: a control means for controlling; and an obstacle detection system.
JP179290U 1990-01-12 1990-01-12 Pending JPH0392878U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP179290U JPH0392878U (en) 1990-01-12 1990-01-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP179290U JPH0392878U (en) 1990-01-12 1990-01-12

Publications (1)

Publication Number Publication Date
JPH0392878U true JPH0392878U (en) 1991-09-20

Family

ID=31505685

Family Applications (1)

Application Number Title Priority Date Filing Date
JP179290U Pending JPH0392878U (en) 1990-01-12 1990-01-12

Country Status (1)

Country Link
JP (1) JPH0392878U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012252252A (en) * 2011-06-06 2012-12-20 Seiko Epson Corp Projector
JP2013044917A (en) * 2011-08-24 2013-03-04 Seiko Epson Corp Projector
JP2016040617A (en) * 2015-10-23 2016-03-24 セイコーエプソン株式会社 projector
JP2018022191A (en) * 2017-10-27 2018-02-08 セイコーエプソン株式会社 projector

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012252252A (en) * 2011-06-06 2012-12-20 Seiko Epson Corp Projector
CN104391420A (en) * 2011-06-06 2015-03-04 精工爱普生株式会社 Projector
US9298074B2 (en) 2011-06-06 2016-03-29 Seiko Epson Corporation Projector
JP2013044917A (en) * 2011-08-24 2013-03-04 Seiko Epson Corp Projector
JP2016040617A (en) * 2015-10-23 2016-03-24 セイコーエプソン株式会社 projector
JP2018022191A (en) * 2017-10-27 2018-02-08 セイコーエプソン株式会社 projector

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