Projector, projection unit, and interactive board
First Claim
1. A projector comprising:
- a main body section includinga light source,a display surface irradiated with light from the light source, andan emission optical system adapted to emit the light from the display surface, and once converting the light from the display surface into light forming an image plane of the display surface tilted with respect to the display surface; and
a projection unit adapted to project the light from the emission optical system, which is emitted from the display surface, toward an irradiated surface, and having an angle-widening mirror with a concave surface having positive power and adapted to reflect and widen an angle of light forming an image plane of the display surface tilted with respect to the display surface,wherein either one of the main body section and the projection unit includes a variable power optical system adapted to vary magnification of the image forming the image plane of the display surface tilted with respect to the display surface, andwherein the emission optical system is switchable between;
a normal display state in which an image forming the image plane of the display surface parallel to the display surface is imaged within a first range with a relatively long distance along an optical axis, anda macro display state in which an image forming the image plane of the display surface tilted with respect to the display surface is imaged within a second range with a relatively short distance along the optical axis.
1 Assignment
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Accused Products
Abstract
A projector includes: a main body section including a light source, a display surface irradiated with light from the light source, and an emission optical system capable of emitting the light from the display surface, and once converting the light from the display surface into light forming an image plane of the display surface tilted with respect to the display surface; and a projection unit projecting the light from the display surface, emitted from the emission optical system, toward an irradiated surface, and having an angle-widening mirror with a concave surface having positive power and reflecting and widening light forming an image plane of the display surface tilted with respect to the display surface. The main body section or the projection unit includes a variable power optical system varying magnification of the image forming the image plane of the display surface tilted with respect to the display surface.
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Citations
12 Claims
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1. A projector comprising:
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a main body section including a light source, a display surface irradiated with light from the light source, and an emission optical system adapted to emit the light from the display surface, and once converting the light from the display surface into light forming an image plane of the display surface tilted with respect to the display surface; and a projection unit adapted to project the light from the emission optical system, which is emitted from the display surface, toward an irradiated surface, and having an angle-widening mirror with a concave surface having positive power and adapted to reflect and widen an angle of light forming an image plane of the display surface tilted with respect to the display surface, wherein either one of the main body section and the projection unit includes a variable power optical system adapted to vary magnification of the image forming the image plane of the display surface tilted with respect to the display surface, and wherein the emission optical system is switchable between; a normal display state in which an image forming the image plane of the display surface parallel to the display surface is imaged within a first range with a relatively long distance along an optical axis, and a macro display state in which an image forming the image plane of the display surface tilted with respect to the display surface is imaged within a second range with a relatively short distance along the optical axis. - View Dependent Claims (2, 3, 5, 6, 7, 8)
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4. A projector comprising:
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a main body section including a light source, a display surface illuminated by light from the light source, and an emission optical system adapted to emit light from the display surface; and a projection unit adapted to project the light from the emission optical system, which is emitted from the display surface, toward an irradiated surface, and having an angle-widening mirror with a concave surface having positive power and adapted to reflect and widen an angle of light from the display surface, wherein light forming an image plane of the display surface parallel to the display surface is provided in a first range with a relatively long distance along an optical axis, and light forming an image plane of the display surface tilted with respect to the display surface is provided in a second range with a relatively short distance along the optical axis. - View Dependent Claims (9, 10, 11, 12)
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Specification