Optical module and projector
AssigneeSeiko Epson Corporation
InventorTakuo YONEYAMA
Life of this patent
Estimating the term…
Abstract
An optical module includes: a light source configured to output light; a light scanner configured to periodically sweep the light output from the light source; and an image light generator configured to generate image light from swept light swept by the light scanner. The light scanner includes a diffractive optical element configured to diffract light at different angles of diffraction in accordance with a light incident position where the light from the light source is incident on the diffractive optical element, and a movement mechanism configured to move the diffractive optical element, and the swept light is scanned across the illuminated region of the image light generator as the diffractive optical element is moved.
Claims8
An optical module comprising:
- a light source configured to output light;
- a light scanner configured to periodically sweep the light output from the light source;
- and
- an image light generator configured to generate image light from swept light swept by the light scanner,
- wherein the light scanner includes
- a diffractive optical element configured to diffract light at different angles of diffraction in accordance with a light incident position where the light is incident on the diffractive optical element, and
- a movement mechanism configured to move the diffractive optical element, and
- the swept light is scanned across the image light generator as the diffractive optical element is moved.
An optical module comprising:
- a light source configured to output light;
- a light scanner configured to periodically sweep the light output from the light source;
- and
- an image light generator configured to generate image light from swept light swept by the light scanner,
- wherein the light source includes a first light emitter, a second light emitter, and a third light emitter arranged side by side in a sweeping direction in which the swept light is swept,
- the light scanner includes
- a first diffractive optical element configured to diffract light incident from the first light emitter to illuminate a first illuminated region of the image light generator,
- a second diffractive optical element disposed at a position shifted from the first diffractive optical element in the sweeping direction, and configured to diffract light incident from the second light emitter to illuminate a second illuminated region of the image light generator,
- a third diffractive optical element disposed at a position shifted from the second diffractive optical element in the sweeping direction, and configured to diffract light incident from the third light emitter to illuminate a third illuminated region of the image light generator, and
- a controller configured to control an operation of driving the first light emitter, the second light emitter, and the third light emitter, and
- the controller is configured to sequentially turn on the first light emitter, the second light emitter, and the third light emitter so that the first illuminated region, the second illuminated region, and the third illuminated region are sequentially illuminated with the swept light.
Dependencies are inferred from the claim text.