Projector and the protector thereof
First Claim
1. A projector for displaying a number of images on a screen, said projector comprising:
- projecting means for projecting light therefrom so as to cause an image to be displayed on the screen located at a remote position;
detecting means for detecting the presence or absence of an object in an area to be subjected to detection, which is a local space near an outer edge of a projection space area wherein projecting light emitted from the projecting means passes through and which does not extend to a plane defined by the screen; and
controlling means for controlling the projecting means so as to reduce the intensity of the projecting light from the projecting means when the detecting means detects an object in the area to be subjected to detection.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed are a projector and the protector thereof having superior safety and practicality. The projector for projecting an image on a screen comprises sensors for performing detection in an area to be subjected to detection that is a local space. The local space is located on the outside of a projection space area which projecting light passes through, and extends along an outer edge of the projection space area. When the sensors detect an object in the area to be subjected to detection, a general controller of the projector turns off a power source of a lamp unit that is a light emitting source, and thus the general controller causes the projector to stop projecting. This prevents damage to the eyes of a person who carelessly looks into a projection lens.
59 Citations
14 Claims
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1. A projector for displaying a number of images on a screen, said projector comprising:
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projecting means for projecting light therefrom so as to cause an image to be displayed on the screen located at a remote position;
detecting means for detecting the presence or absence of an object in an area to be subjected to detection, which is a local space near an outer edge of a projection space area wherein projecting light emitted from the projecting means passes through and which does not extend to a plane defined by the screen; and
controlling means for controlling the projecting means so as to reduce the intensity of the projecting light from the projecting means when the detecting means detects an object in the area to be subjected to detection. - View Dependent Claims (2, 3, 4)
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5. A projector for displaying a number of images on a screen, said projector comprising:
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projecting means for projecting light therefrom so as to cause an image to be displayed on the screen located at a remote position;
detecting means for detecting the presence or absence of an object in an area to be subjected to detection, which is a local space near an outer edge of a projection space area which projecting light emitted from the projecting means passes through; and
controlling means for controlling the projecting means so as to reduce the intensity of the projecting light from the projecting means when the detecting means detects an object in the area to be subjected to detection, wherein a maximum perpendicular distance of a maximum detection distance, which is a perpendicular distance between the projecting means and a plane parallel to the screen which includes the farthest end of the area to be subjected to detection away from the detecting means, is shorter than a perpendicular distance between the projecting means and the screen. - View Dependent Claims (6, 7, 8)
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9. A protector for use in a projector for projecting an image on a screen located at a remote position, comprising:
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detecting means for detecting the presence or absence of an object in an area to be subjected to detection, which is a local space near an outer edge of a projection space area which projecting light emitted from the projector passes through; and
controlling means for controlling the projector so as to reduce the intensity of the projecting light from the projector when the detecting means detects an object in the area to be subjected to detection, wherein a maximum perpendicular distance of a maximum detection distance, which is a perpendicular distance between the projector and a plane parallel to the screen which includes the farthest end of the area to be subjected to detection away from the detecting means, is shorter than a perpendicular distance between the projector and the screen. - View Dependent Claims (10)
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11. A protector for use in a projector for projecting an image on a screen located at a remote position, comprising:
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detecting means for detecting the presence or absence of an object in an area to be subjected to detection, which is a local space near an outer edge of a projection space area wherein projecting light emitted from the projector passes through and which does not extend to a plane defined by the screen; and
controlling means for controlling the projector so as to reduce the intensity of the projecting light from the projector when the detecting means detects an object in the area to be subjected to detection. - View Dependent Claims (12, 13, 14)
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Specification