Patent ID: 9362103
Filing Date: 2016-06-07
CPC Classification: H01J

Claim Text:
1. A method of lighting a high-pressure discharge lamp, comprising: lighting the high-pressure discharge lamp at an arc tube part temperature of greater than or equal to 750 degrees Celsius and less than or equal to 870 degrees Celsius in a condition that an encapsulated rate of mercury is set to be greater than or equal to 0.33 mg/mm wherein the high-pressure discharge lamp includes an arc tube part having an internal space, a pair of tungsten electrodes disposed in opposition to each other within the internal space, and the mercury and the halogen encapsulated into the internal space, a portion of the mercury is present as a deposit within the internal space without evaporating when the lamp is lit, and the halogen is present in the internal space relatively to a capacity of the internal space so as to establish a halogen cycle when the mercury is deposited within the internal space without evaporating.