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1. (JPWO2007010781) 高圧放電ランプの点灯方法、点灯装置、光源装置及び投射型画像表示装置

Office : Japan
Application Number: JP2006313744 Application Date: 11.07.2006
Publication Number: WO2007010781 Publication Date: 25.01.2007
Publication Kind : A1
IPC:
G09G 3/34
H05B 41/24
G09G 3/20
G03B 21/14
G03B 21/00
G PHYSICS
09
EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
G
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20
for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
34
by control of light from an independent source
H ELECTRICITY
05
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
B
ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
41
Circuit arrangements or apparatus for igniting or operating discharge lamps
14
Circuit arrangements
24
in which the lamp is fed by high-frequency ac
G PHYSICS
09
EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
G
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20
for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
G PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
B
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21
Projectors or projection-type viewers; Accessories therefor
14
Details
G PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
B
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21
Projectors or projection-type viewers; Accessories therefor
Applicants: パナソニック株式会社
Inventors: 池田 勝
小野 俊介
小笹 稔
山本 匡宏
山田 剛
Agents: 中島 司朗
松村 修治
小林 国人
Priority Data: 2005207414 15.07.2005 JP
Title: (JA) 高圧放電ランプの点灯方法、点灯装置、光源装置及び投射型画像表示装置
Abstract:
(JA)

高圧放電ランプを長寿命化できる点灯方法を提供する。
高圧放電ランプを点灯開始させてその点灯を維持させる点灯方法は、高圧放電ランプの点灯開始から点灯経過時間が所定条件(例えば、点灯経過時間が5分)以内の場合、ランプ電圧が切換え電圧(ここでは第1の電圧値V1)未満では定電流制御を行い、ランプ電圧が切換え電圧以上ではランプ電力を電力値W1に維持する定電力制御を行い、前記所定条件(点灯経過時間が5分)を越えた後は、切換え電圧の値を、第1の電圧値V1から第2の電圧値V2に下げて、ランプ電圧が前記下げた切換え電圧以上では、ランプ電力を電力値W1に維持する定電力制御を行う。


Also published as:
US20090115974JP4682202CN101223829WO/2007/010781