Projector using lamp, method and program for controlling discharge lamp light source
AssigneeCasio Computer Co., Ltd.
InventorAkira Tanaka
Life of this patent
Estimating the term…
Abstract
A projector comprises an alternating-current-drive lamp, a rotating color wheel which includes color segments for transmitting color lights and is disposed in an optical path from the lamp, the color segments including a transparent segment, a projection unit configured to form an optical image by the color lights transmitted through the color wheel, and a light source control unit configured to raise a drive frequency of the lamp in a period in which the transparent segment of the color wheel is present in the optical path from the lamp.
Claims9
A projector comprising:
- an alternating-current-drive lamp configured to emit a white light;
- a rotating color wheel which is disposed in an optical path from the lamp and which includes color segments and a transparent segment, the color segments coloring the white light emitted from the lamp to produce color lights, and the transparent segment transmitting the white light;
- a projection unit configured to form an optical image by the color lights and the white light which are transmitted through the color wheel;
- and
- a light source control unit configured to raise a drive frequency of the lamp in a period in which the transparent segment of the color wheel is present in the optical path from the lamp.
A method for controlling a projector which comprises:
- (i) an alternating-current-drive lamp configured to emit a white light;
- (ii) a rotating color wheel which is disposed in an optical path from the lamp and which includes color segments and a transparent segment, the color segments coloring the white light emitted from the lamp to produce color lights, and the transparent segment transmitting the white light;
- and (iii) a projection unit configured to form an optical image by the color lights and the white light which are transmitted through the color wheel, the method comprising:
- raising a drive frequency of the lamp in a period in which the transparent segment of the color wheel is present in the optical path from the lamp.
A non-transitory computer readable storage medium having stored thereon a computer program for a projector, the projector comprising:
- (i) an alternating-current-drive lamp configured to emit a white light;
- a rotating color wheel which is disposed in an optical path from the lamp and which includes color segments and a transparent segment, the color segments coloring the white light emitted from the lamp to produce color lights, and the transparent segment transmitting the white light ;
- and (iii) a projection unit configured to form an optical image by the color lights and the white light which are transmitted through the color wheel, wherein the program controls the projector to perform functions comprising:
- raising a drive frequency of the lamp in a period in which the transparent segment of the color wheel is present in the optical path from the lamp.
Dependencies are inferred from the claim text.