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US 2014/0368746 A1Published application
Projector
AssigneeSeiko Epson Corporation
InventorNobuo SUGIYAMA
Life of this patent
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Abstract
A projector includes a lamp, a ballast, an aperture member including light-blocking plates, a light-blocking plate driving motor, a control section, a light modulation device, and a projection optical system, and the control section controls the ballast and the light-blocking plate driving motor so as to modulate the lamp power based on a luminance of the video signal while fixing the aperture of the aperture member to a constant value in a picture period in accordance with a luminance parameter corresponding to a video signal group in the picture period among a series of the video signals.
Claims5
A projector comprising:
- a light source adapted to emit light and vary light intensity in accordance with a light source power supplied to the light source;
- a light source power supply section adapted to supply the light source with the light source power;
- an aperture member having a variable aperture of a transmitting area through which the light emitted from the light source is transmitted;
- an aperture drive device adapted to drive the aperture member to control the aperture;
- a control section adapted to control the light source power supply section and the aperture drive device;
- a light modulation device adapted to modulate the light emitted from the light source based on a video signal;
- and
- a projection optical system adapted to project the light modulated by the light modulation device,
- wherein the control section controls the light source power supply section and the aperture drive device so as to modulate the light source power based on a luminance of the video signal while fixing the aperture of the aperture member to a constant value during a picture period in accordance with a luminance parameter corresponding to a video signal group in the picture period among a series of the video signals.
6 more elements
Dependencies are inferred from the claim text.