Single panel color projector
AssigneeSeiko Epson Corporation
InventorsKesatoshi Takeuchi, Takahiro Sagawa
Life of this patent
Estimating the term…
Abstract
The projector comprises a light source that emits illuminating light, a single modulation panel, a projection optical system, a color filter mechanism, a converging optical system that converges the illuminating light on a filter surface of the color filter mechanism, and a controller for controlling the color filter mechanism and the single modulation panel. The color filter mechanism includes a rotatable filter rotor having a plurality of color filters and a plurality of light-blocking mask bands provided at the boundaries of the color filters, and a filter driver that rotates the filter rotor. The converging optical system converges the illuminating light such that the size of the illuminating light spot on the filter surface is smaller than the individual color filters.
Claims7
A projector comprising:
- a light source configured to emit illuminating light;
- a single modulation panel configured to modulate the illuminating light in response to a given drive signal, thereby producing image light representing an image;
- a projection optical system configured to project the image light;
- a color filter mechanism, disposed in one of an incident-side path and an emergent-side optical path of the single modulation panel, for changing the illuminating light into one of a plurality of colors in a predetermined order;
- a converging optical system configured to converge the illuminating light on a filter surface of the color filter mechanism;
- and
- a controller configured to control the color filter mechanism and the single modulation panel,
- the color filter mechanism including:
- a rotatable filter rotor having a plurality of color filters and a plurality of light-blocking mask bands provided at boundaries of the color filters, markings near the mask bands, the markings indicating positions of the mask bands,
- a marking sensor for identifying the markings to produce marking detection signals,
- and the controller synchronizes the rotation of the filter rotor and the transfer of the drive signals to the single modulation panel on the basis of the marking detection signals;
- and
- a filter driver configured to rotate the filter rotor, and
- the converging optical system converging the illuminating light such that a size of a spot of the illuminating light on the filter surface is smaller than the individual color filters.
A projector comprising:
- a light source configured to emit illuminating light;
- a single modulation panel configured to modulate the illuminating light in response to a given drive signal, thereby producing image light representing an image, the single modulation panel having a modulation execution region on which the modulation of light is executed;
- a projection optical system configured to project the image light;
- a color filter mechanism, disposed in one of an incident-side path and an emergent-side optical path of the single modulation panel, for changing the illuminating light into one of a plurality of colors in a predetermined order;
- a converging optical system configured to converge the illuminating light on a filter surface of the color filter mechanism;
- and
- a controller configured to control the color filter mechanism and the single modulation panel,
- the color filter mechanism including:
- a rotatable filter rotor having a plurality of color filters and a plurality of light-blocking mask bands provided at boundaries of the color filters;
- and
- a filter driver configured to rotate the filter rotor, and
- the controller writing drive signals for color components corresponding to the plurality of color filters into the single modulation panel in synchronism with rotation of the filter rotor such that the drive signals for a next color component to be displayed are transferred to the single modulation panel during a specific panel rewriting period, the specific panel rewriting period including at least part of a masked light passage period, the masked light passage period being a period during which a masked light portion, which is a portion of the illuminating light which passes through the mask bands, passes over the modulation execution region of the single modulation panel.
Dependencies are inferred from the claim text.