DISCHARGE LAMP LIGHTING DEVICE, LIGHT SOURCE DEVICE, IMAGE FORMATION DEVICE

PROBLEM TO BE SOLVED: To provide a lighting system of a discharge lamp capable of suppressing flickering of a projection image more than conventional.SOLUTION: A power supply control unit has a segment signal generating section for generating a segment signal indicating a plurality of segment period...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUMOTO SHIGECHIKA, YAMADA KOJI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ACCESSORIES THEREFOR ADVERTISING APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION CINEMATOGRAPHY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS,e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USERAPPLICATIONS CRYPTOGRAPHY DISPLAY EDUCATION ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY ELECTROGRAPHY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HOLOGRAPHY PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION SEALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a lighting system of a discharge lamp capable of suppressing flickering of a projection image more than conventional.SOLUTION: A power supply control unit has a segment signal generating section for generating a segment signal indicating a plurality of segment periods by dividing a specific period indicated by a video synchronization signal, and a peak value control section for generating a first control signal depending on the peak value of an AC current for every segment period. The peak value control section sets a specific segment period where an integration value, i.e., the product of the length of segment period and a peak value set in the segment period, indicates a value farthest from the average value of integration value in the specific period, out of a plurality of segment periods belonging to the specific period, in other than the final segment located at the end of the specific period.SELECTED DRAWING: Figure 3 【課題】投射画像のちらつきを従来よりも抑制することのできる放電ランプの点灯方式を提供する。【解決手段】給電制御部は、映像同期信号が示す特定期間を分割して複数のセグメント期間を示すセグメント信号を生成するセグメント信号生成部と、セグメント期間毎に交流電流の波高値に応じた第一制御信号を生成する波高値制御部を有する。波高値制御部は、特定期間に属する複数のセグメント期間のうち、セグメント期間の長さとセグメント期間に設定される波高値の積である積分値が特定期間内における積分値の平均値から最も離れた値を示す特定セグメント期間を、特定期間の最終に位置する最終セグメント期間以外に設定する。【選択図】図３