Filling composition for incandescent lamp, and incandescent lamp containing the same and its use
AssigneeKen Hayashibara
InventorsOsamu Matsuda, Takahiro Yaguchi
Life of this patent
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Abstract
A filling composition consisting essentially of about 20-75% by volume of xenon gas and about 15-80% by volume of nitrogen gas exhibits excellent luminous characteristics and an extended life expectancy but hardly causes arc discharge when enclosed in incandescent lamp. Incandescent lamps using the filling composition emit a light which is natural, appropriately high in color temperature, excellent in color rendering properties and gentle to the eye when operated at a voltage exceeding their rating but not exceeding 150% thereof.
Claims16
A filling composition for incandescent lamp, consisting of 20-75% by volume of xenon gas, and 25-80% by volume of nitrogen gas.
An incandescent lamp which encloses a filling composition consisting of 20-70% by volume of xenon gas, and 25-80% by volume of nitrogen gas;
- and has an operating voltage of about 90-150v and a rated wattage of 40-100w.
An incandescent lamp which encloses a filling composition consisting of 20-75% by volume of xenon gas, and 25-80% by volume of nitrogen gas;
- and has an operating voltage of about 90-150v and a rated wattage of 40-100w;
- wherein said filling composition is enclosed to give a pressure of about 700-800 torr in incandescent state.
A lighting device comprising:
- an incandescent lamp as luminous source, said incandescent lamp enclosing a filling composition consisting of 20-75% by volume of xenon gas and 25-80% by volume of nitrogen gas, and having a rated wattage of 40-100 w;
- and
- a power source to operate said incandescent lamp, said power source being capable of operating said incandescent lamp at a wattage in the range of about 90-150 v.
A lighting device comprising
- an incandescent lamp as luminous source, said incandescent lamp enclosing a filling composition consisting of 20-75% by volume of xenon gas and 25-80 by volume of nitrogen gas, wherein said incandescent lamp has an arc starting voltage not lower than 170% of its rating, and a rated wattage of 40-100w;
- and
- a power source to operate said incandescent lamp, said power source be capable of operating said incandescent lamp at a voltage in the range of about 90-150v.
Dependencies are inferred from the claim text.