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US 2004/0174692 A1Published application
Transflective color recovery
AssigneeInFocus Corporation
InventorSerge J.A. Bierhuizen
Life of this patent
Estimating the term…
Abstract
Embodiments of the present invention include an apparatus, method and system for an illumination arrangement including a color recycling subsystem.
Claims30
An apparatus comprising:
- a light source to generate light;
- a transflective color filter optically coupled to the light source, to receive the light along an incident axis, said transflective color filter including at least one color passband to transmit at least a portion of light within a range of frequencies, and to reflect, along a reflectance axis, at least a portion of light outside of the range of frequencies, with the incident and the reflectance axes being non-coincident;
- and
- a recycling subsystem optically coupled to the transflective color filter, having an input positioned on the reflectance axis and an output, the recycling subsystem to receive the reflected light through the input, and to emit recycled light through the output towards the transflective color filter.
1 more element
A method comprising:
- generating light from a light source;
- receiving the light along an incident axis with a transflective color filter, transmitting light within a range of frequencies and reflecting light that is outside of the range of frequencies, along a reflectance axis that is non-coincident with the incident axis;
- and
- recycling the reflected light by reintroducing it to the transflective color filter.
1 more element
A system comprising:
- a video unit with an output video signal;
- and
- a projection system, coupled to video unit, to receive video signal and project video, said projection system comprising
- an illumination arrangement including
- a light source, to generate light along an incident axis;
- and
- a color recycling subsystem having an input off of the incident axis;
- a display optically coupled to the illumination arrangement;
- and
- a projection lens optically coupled to display.
7 more elements
Dependencies are inferred from the claim text.