Projector
AssigneeSeiko Epson Corporation
InventorTakeshi TAKEZAWA
Life of this patent
Estimating the term…
Abstract
A projector includes: plural high-pressure discharge lamps; a high-pressure discharge lamp lighting device for lighting the plural high-pressure discharge lamps; a light combining system that combines and outputs lights from the plural high-pressure discharge lamps; an electro-optical modulation device that modulates the light from the light combining system according to image information; and a projection system that projects the light modulated by the electro-optical modulation device, wherein the high-pressure discharge lamp lighting device supplies alternating lamp currents having alternating-current waveforms with the same waveform and period and phases shifted by a predetermined amount with respect to each of the high-pressure discharge lamps to the respective plural high-pressure discharge lamps.
Claims9
A projector comprising:
- plural high-pressure discharge lamps;
- a high-pressure discharge lamp lighting device that lights the plural high-pressure discharge lamps;
- a light combining system that combines and outputs lights from the plural high-pressure discharge lamps;
- an electro-optical modulation device that modulates the light from the light combining system according to image information;
- and
- a projection system that projects the light modulated by the electro-optical modulation device,
- the high-pressure discharge lamp lighting device supplying alternating lamp currents having alternating-current waveforms with the same waveform and period and phases shifted by a predetermined amount with respect to each of the high-pressure discharge lamps to the respective plural high-pressure discharge lamps.
A projector comprising:
- a plurality of high-pressure discharge lamps;
- a high-pressure discharge lamp lighting device that lights the plurality of high-pressure discharge lamps;
- a light combining system that combines and outputs lights from the plurality high-pressure discharge lamps;
- an electro-optical modulation device that modulates the light from the light combining system according to image information;
- and
- a projection system that projects the light modulated by the electro-optical modulation device,
- the high-pressure discharge lamp lighting device supplying alternating lamp currents to the respective plural high-pressure discharge lamps, the alternating lamp currents being triangular waves.
Dependencies are inferred from the claim text.