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US 10,372,027 B2Granted
Illuminator and projector
AssigneeSeiko Epson Corporation
InventorKoichi Akiyama
Life of this patent
Estimating the term…
Abstract
An illuminator includes first and second light emitting devices that emit first and second light beams, respectively, first and second lens arrays, a light ray combining element that combines at least parts of the first and second light beams having passed through the first and second lens arrays with each other to produce a combined light ray flux, a light collection lens, and a diffused light producing element on which the combined light ray flux having passed through the light collection lens is incident.
Claims9
An illuminator comprising:
- a first light emitting device that emits a first light beam;
- a second light emitting device that emits a second light beam;
- a first lens array on which the first light beam is incident;
- a second lens array on which the second light beam is incident;
- a light ray combining element that combines the first light beam having passed through the first lens array with at least part of the second light beam having passed through the second lens array to produce a combined light ray flux;
- a light collection lens on which the combined light ray flux is incident;
- and
- a diffused light producing element on which the combined light ray flux having passed through the light collection lens is incident,
- wherein a cross section of the first light beam that is perpendicular to an optical axis of the first light beam has a major axis,
- a cross section of the second light beam that is perpendicular to an optical axis of the second light beam has a major axis, and
- the first light emitting device and the second light emitting device are so provided that a plane containing the major axis of the first light beam and the optical axis of the first light beam and so located as to face a front side of the first lens array intersects a plane containing the major axis of the second light beam and the optical axis of the second light beam and so located as to face a front side of the second lens array.
8 more elements
Dependencies are inferred from the claim text.