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US 2006/0215128 A1Published application
Projector having a color wheel including intermediate color filters
AssigneeCasio Computer Co., Ltd.
InventorMasakuni Iwanaga
Life of this patent
Estimating the term…
Abstract
A color wheel 35 has equally arranged RGB primary color filters, and intermediate color filters each arranged between adjacent primary color filters. A time division driver 39 drives a spatial light modulator 31 by supplying color signals corresponding to color of the lights from the color wheel 35 to the spatial light modulator 31. The time division driver 39 controls the spatial light modulator 31 in accordance with display control instructed by a control unit 14. Since the intermediate color filters are arranged between the adjacent primary color filters, a projector engine 13 projects mixed color lights during color mixture terms where the primary color and the intermediate color are mixed, thus improves the color reproduction performance.
Claims12
A projector for projecting images onto a screening member, comprising:
- a light source which emits lights;
- a filter unit which has a plurality of primary color filters for dividing the lights from said light source into a plurality of primary color lights, and a plurality of intermediate color filters arranged between the adjacent primary color filters each of which is colored by an intermediate color between the adjacent primary colors;
- a spatial light modulator which is driven to project the colored lights from said filter unit to said screening member to project said images;
- and
- a display driver, to which a plurality of primary color signals for generating said images to be projected onto said screening member are supplied, which generates intermediate color signals based on the supplied primary color signals, and drives said spatial light modulator by supplying said primary color signals to said spatial light modulator so that primary color of the supplying primary color signal corresponds to primary color of the lights from said filter unit and by supplying the generated intermediate color signals to said spatial light modulator so that intermediate color of the generated intermediate color signal corresponds to intermediate color of lights from said filter unit.
2 more elements
A method for controlling a spatial light modulator in a projector which comprises:
- a light source which emits lights;
- a filter unit which has a plurality of primary color filters for dividing the lights from said light source into a plurality of primary color lights, and a plurality of intermediate color filters arranged between the adjacent primary color filters each of which is colored by an intermediate color between the adjacent primary colors;
- and
- said spatial light modulator which is driven to project the colored lights from said filter unit to said screening member to project said images, wherein
- said method comprising the steps of:
- obtaining a plurality of primary color signals for generating images to be projected onto said screening member;
- supplying said primary color signals to said spatial light modulator so that primary color of the supplying primary color signal corresponds to primary color of lights from said filter unit;
- generating intermediate color signals based on said obtained primary color signals;
- and
- supplying said intermediate color signals to said spatial light modulator so that intermediate color of the supplying intermediate color signal corresponds to intermediate color of lights from said filter unit.
7 more elements
A program for controlling a spatial light modulator in a projector which comprises:
- a light source which emits lights;
- a filter unit which has a plurality of primary color filters for dividing the lights from said light source into a plurality of primary color lights, and a plurality of intermediate color filters arranged between the adjacent primary color filters each of which is colored by an intermediate color between the adjacent primary colors;
- and
- said spatial light modulator which is driven to project the colored lights from said filter unit to said screening member to project said images, wherein
- said program comprising the steps of:
- obtaining a plurality of primary color signals for generating images to be projected onto said screening member;
- supplying said primary color signals to said spatial light modulator so that primary color of the supplying primary color signal corresponds to primary color of lights from said filter unit;
- generating intermediate color signals based on said obtained primary color signals;
- and
- supplying said intermediate color signals to said spatial light modulator so that intermediate color of the supplying intermediate color signal corresponds to intermediate color of lights from said filter unit.
7 more elements
A projector for projecting images onto a screening member, comprising:
- light source means for emitting lights;
- filter means for dividing the lights from said light source into a plurality of primary color lights by a plurality of primary color filters and a plurality of intermediate color filters arranged between the adjacent primary color filters each of which is colored by an intermediate color between the adjacent primary colors;
- spatial light modulation means for projecting the colored lights from said filter means to said screening member to project said images;
- and
- display control means for generating intermediate color signals based on a plurality of supplied primary color signals for the images to be projected onto said screening member, and for driving said spatial light modulation means by supplying said primary color signals to said spatial light modulator so that primary color of the supplying primary color signal corresponds to primary color of the lights from said filtering means and by supplying the generated intermediate color signals to said spatial light modulation means so that intermediate color of the generated intermediate color signal corresponds to intermediate color of lights from said filtering means.
2 more elements
A time division driver which carries out time divisionary control for image projection, characterized by:
- generating intermediate color signals each representing an intermediate color among primary colors based on a plurality of supplied primary color signals;
- time divisionary transmitting said primary color signals and said intermediate color signals to spatial light modulator so that said spatial light modulator modulates lights from a light source to project images onto a screening member;
- and
- controlling said light source by supplying control signals to said light source so that lights from said light source having colors corresponding to said primary color signals and said intermediate color signals are supplied to said spatial light modulation.
1 more element
A spatial light modulator which carries out light modulation for image projection, characterized by:
- receiving control signals time divisionary supplied from a time division driver including signals based on not only primary colors but also intermediate colors;
- and
- modulating lights whose colors are time divisionary changes based on said received control signals.
Dependencies are inferred from the claim text.