JPH0380481U - - Google Patents

Info

Publication number
JPH0380481U
JPH0380481U JP6996290U JP6996290U JPH0380481U JP H0380481 U JPH0380481 U JP H0380481U JP 6996290 U JP6996290 U JP 6996290U JP 6996290 U JP6996290 U JP 6996290U JP H0380481 U JPH0380481 U JP H0380481U
Authority
JP
Japan
Prior art keywords
power supply
light source
power
discharge lamp
supply circuit
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
JP6996290U
Other languages
English (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 JP6996290U priority Critical patent/JPH0380481U/ja
Publication of JPH0380481U publication Critical patent/JPH0380481U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (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】
第１図は本考案の投写用光源装置の１実施例の
回路ブロツク図、第２図は本考案の他の実施例を
示す図、第３図は液晶ビデオプロジエクタの光学
系の説明図である。 ３……高圧放電灯、８……電源スイツチ、１１
……光源用電源回路、１３……操作検出回路、１
４……カウンタ、１７……表示部。

Claims (1)

  1. 【実用新案登録請求の範囲】 電源オン操作により光源用電源回路を給電駆
    動し、前記電源回路の出力で投写光源用の高圧放
    電灯を点灯駆動し、電源オフ操作により前記電源
    回路の給電を停止し、前記電源回路の出力をオフ
    して前記放電灯を消灯する投写用光源装置におい
    て、 前記電源オフ操作又は前記電源オン操作を検出
    する操作検出回路と、 前記検出航路の検出出力を計数し、計数値が前
    記放電灯の１回の点灯駆動時間の予測値に基づい
    て設定された寿命回数以上のときに終了信号を出
    力するカウンタと、 前記終了信号により前記放電灯の取換えを報知
    する報知手段と を備えた投写用電源装置。 前記報知手段は前記終了信号により駆動され
    る発光ダイオードである請求項１記載の投写用光
    源装置。 前記報知手段は前記終了信号により駆動され
    、前記報知をオンスクリーン表示により行う文字
    表示回路である請求項１記載の投写用光源装置。
JP6996290U 1989-08-19 1990-06-29 Pending JPH0380481U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6996290U JPH0380481U (ja) 1989-08-19 1990-06-29

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9700989 1989-08-19
JP6996290U JPH0380481U (ja) 1989-08-19 1990-06-29

Publications (1)

Publication Number Publication Date
JPH0380481U true JPH0380481U (ja) 1991-08-19

Family

ID=31890155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6996290U Pending JPH0380481U (ja) 1989-08-19 1990-06-29

Country Status (1)

Country Link
JP (1) JPH0380481U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999044097A1 (en) * 1998-02-26 1999-09-02 Seiko Epson Corporation Projection display apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02191934A (ja) * 1988-10-31 1990-07-27 Dainippon Screen Mfg Co Ltd 露光装置の光源劣化防止方法および装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02191934A (ja) * 1988-10-31 1990-07-27 Dainippon Screen Mfg Co Ltd 露光装置の光源劣化防止方法および装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999044097A1 (en) * 1998-02-26 1999-09-02 Seiko Epson Corporation Projection display apparatus
US6448715B1 (en) 1998-02-26 2002-09-10 Seiko Epson Corporation Projection display apparatus

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