HIGH WATT TYPE CERAMIC METAL HALIDE LAMP ILLUMINATION DEVICE
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United States of America Patent
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Issued Date -
Dec 4, 2014
app pub date -
Aug 4, 2012
filing date -
Sep 14, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A high watt type ceramic metal halide lamp illumination device is provided. The device comprises: ballast receiving a primary input voltage and outputting a secondary voltage, and a lamp having a plurality of arc tubes electrically connected in series inside an outer bulb. The lamp is lighted by receiving the secondary voltage output from the ballast. The secondary voltage output from the ballast has a waveform that at least satisfies a maximum-value to effective-value ratio (Vmax/Veff) of greater than 20.5. When using two 360 W arc tubes of a popular type by electrically connecting the two in series instead of a 700 W arc tube of a high-watt type, for example, it is preferable to use a triangular waveform AC voltage that satisfies 260≦Veff(triangular waveform) when expressed by the effective-value, and 500 V≦Vmax(triangular waveform) when expressed by the maximum-value.
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