ELECTRIC DISCHARGE LAMP LIGHTING DEVICE
PURPOSE:To obtain low luminous flux by detecting a current in an electric discharge lamp, and controlling an on-period of a switching element. CONSTITUTION:When a peak current of a lamp current 11a in an electric discharge lamp 1a tends to be voltage V0 or more of a power supply 2, an output of a co...
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| creator | HONGO TOSHIICHI HARA TAKAHIRO MIYAGI HIDEO |
| description | PURPOSE:To obtain low luminous flux by detecting a current in an electric discharge lamp, and controlling an on-period of a switching element. CONSTITUTION:When a peak current of a lamp current 11a in an electric discharge lamp 1a tends to be voltage V0 or more of a power supply 2, an output of a comparator CP2 leads to an L level. Consequently, a capacitor C3 is discharged, to decrease reference voltage Vref, and a comparator CP1 is inverted to output an L level. Accordingly, a transistor Q1 is turned off to prevent a tube current from increasing in the electric discharge lamp 1a. In a period the peak current in the electric discharge lamp la is the voltage V0 or less of the power supply 2, the reference voltage Vref rises, and the transistor Q1 is actuated so as to maintain its on-operation till the peak current 1a in the electric discharge lamp 1a rises to V0. Thus by fixing a mean current of the electric discharge lamp, dimming can be stably performed without going out and a flicker to low luminous flux. |
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CONSTITUTION:When a peak current of a lamp current 11a in an electric discharge lamp 1a tends to be voltage V0 or more of a power supply 2, an output of a comparator CP2 leads to an L level. Consequently, a capacitor C3 is discharged, to decrease reference voltage Vref, and a comparator CP1 is inverted to output an L level. Accordingly, a transistor Q1 is turned off to prevent a tube current from increasing in the electric discharge lamp 1a. In a period the peak current in the electric discharge lamp la is the voltage V0 or less of the power supply 2, the reference voltage Vref rises, and the transistor Q1 is actuated so as to maintain its on-operation till the peak current 1a in the electric discharge lamp 1a rises to V0. Thus by fixing a mean current of the electric discharge lamp, dimming can be stably performed without going out and a flicker to low luminous flux.</description><edition>5</edition><language>eng</language><subject>APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS ; CONTROL OR REGULATION THEREOF ; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER ; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRIC HEATING ; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ; ELECTRICITY ; GENERATION</subject><creationdate>1994</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19940513&DB=EPODOC&CC=JP&NR=H06132093A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76516</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19940513&DB=EPODOC&CC=JP&NR=H06132093A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>HONGO TOSHIICHI</creatorcontrib><creatorcontrib>HARA TAKAHIRO</creatorcontrib><creatorcontrib>MIYAGI HIDEO</creatorcontrib><title>ELECTRIC DISCHARGE LAMP LIGHTING DEVICE</title><description>PURPOSE:To obtain low luminous flux by detecting a current in an electric discharge lamp, and controlling an on-period of a switching element. CONSTITUTION:When a peak current of a lamp current 11a in an electric discharge lamp 1a tends to be voltage V0 or more of a power supply 2, an output of a comparator CP2 leads to an L level. Consequently, a capacitor C3 is discharged, to decrease reference voltage Vref, and a comparator CP1 is inverted to output an L level. Accordingly, a transistor Q1 is turned off to prevent a tube current from increasing in the electric discharge lamp 1a. In a period the peak current in the electric discharge lamp la is the voltage V0 or less of the power supply 2, the reference voltage Vref rises, and the transistor Q1 is actuated so as to maintain its on-operation till the peak current 1a in the electric discharge lamp 1a rises to V0. Thus by fixing a mean current of the electric discharge lamp, dimming can be stably performed without going out and a flicker to low luminous flux.</description><subject>APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS</subject><subject>CONTROL OR REGULATION THEREOF</subject><subject>CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER</subject><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</subject><subject>ELECTRIC HEATING</subject><subject>ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR</subject><subject>ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR</subject><subject>ELECTRICITY</subject><subject>GENERATION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1994</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFB39XF1DgnydFZw8Qx29nAMcndV8HH0DVDw8XT3CPH0c1dwcQ3zdHblYWBNS8wpTuWF0twMim6uIc4euqkF-fGpxQWJyal5qSXxXgEeBmaGxkYGlsaOxsSoAQDSlCPF</recordid><startdate>19940513</startdate><enddate>19940513</enddate><creator>HONGO TOSHIICHI</creator><creator>HARA TAKAHIRO</creator><creator>MIYAGI HIDEO</creator><scope>EVB</scope></search><sort><creationdate>19940513</creationdate><title>ELECTRIC DISCHARGE LAMP LIGHTING DEVICE</title><author>HONGO TOSHIICHI ; HARA TAKAHIRO ; MIYAGI HIDEO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH06132093A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1994</creationdate><topic>APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS</topic><topic>CONTROL OR REGULATION THEREOF</topic><topic>CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER</topic><topic>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</topic><topic>ELECTRIC HEATING</topic><topic>ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR</topic><topic>ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR</topic><topic>ELECTRICITY</topic><topic>GENERATION</topic><toplevel>online_resources</toplevel><creatorcontrib>HONGO TOSHIICHI</creatorcontrib><creatorcontrib>HARA TAKAHIRO</creatorcontrib><creatorcontrib>MIYAGI HIDEO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>HONGO TOSHIICHI</au><au>HARA TAKAHIRO</au><au>MIYAGI HIDEO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>ELECTRIC DISCHARGE LAMP LIGHTING DEVICE</title><date>1994-05-13</date><risdate>1994</risdate><abstract>PURPOSE:To obtain low luminous flux by detecting a current in an electric discharge lamp, and controlling an on-period of a switching element. CONSTITUTION:When a peak current of a lamp current 11a in an electric discharge lamp 1a tends to be voltage V0 or more of a power supply 2, an output of a comparator CP2 leads to an L level. Consequently, a capacitor C3 is discharged, to decrease reference voltage Vref, and a comparator CP1 is inverted to output an L level. Accordingly, a transistor Q1 is turned off to prevent a tube current from increasing in the electric discharge lamp 1a. In a period the peak current in the electric discharge lamp la is the voltage V0 or less of the power supply 2, the reference voltage Vref rises, and the transistor Q1 is actuated so as to maintain its on-operation till the peak current 1a in the electric discharge lamp 1a rises to V0. Thus by fixing a mean current of the electric discharge lamp, dimming can be stably performed without going out and a flicker to low luminous flux.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
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| subjects | APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERATION |
| title | ELECTRIC DISCHARGE LAMP LIGHTING DEVICE |
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