Projector and control method therefor
First Claim
1. A projector for projecting an image to a screen, comprising:
- a lamp configured to emit light;
an elliptic reflecting mirror configured to reflect and condense the light from said lamp;
an image display device configured to modulate the light reflected and condensed by said elliptic reflecting mirror with image data corresponding to the image to convert the reflected light into image light;
a projection lens disposed between said screen and said image display device and configured to project the image light from said image display device to said screen; and
a position adjustment mechanism configured to displace a bright point of said lamp from a first focus of said elliptic reflecting mirror to adjust a position of said lamp so as to decrease an effective light amount of said image display device to approximately 30%.
1 Assignment
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Accused Products
Abstract
Disclosed herein is a projector for projecting an image to a screen, including: a lamp configured to emit light; an elliptic reflecting mirror configured to reflect and condense the light from the lamp; an image display device configured to modulate the light reflected and condensed by the elliptic reflecting mirror with image data corresponding to the image to convert the reflected light into image light; a projection lens disposed between the screen and the image display device and configured to project the image light from the image display device to the screen; and a position adjustment mechanism configured to displace the bright point of the lamp from a first focus of the elliptic reflecting mirror to adjust the position of the lamp so as to decrease the effective light amount of the image display device.
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Citations
16 Claims
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1. A projector for projecting an image to a screen, comprising:
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a lamp configured to emit light; an elliptic reflecting mirror configured to reflect and condense the light from said lamp; an image display device configured to modulate the light reflected and condensed by said elliptic reflecting mirror with image data corresponding to the image to convert the reflected light into image light; a projection lens disposed between said screen and said image display device and configured to project the image light from said image display device to said screen; and a position adjustment mechanism configured to displace a bright point of said lamp from a first focus of said elliptic reflecting mirror to adjust a position of said lamp so as to decrease an effective light amount of said image display device to approximately 30%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A control method for a projector to project an image to a screen, the projector including a lamp configured to emit light, an elliptic reflecting mirror configured to reflect and condense the light from the lamp, an image display device configured to modulate the light reflected and condensed by the elliptic reflecting mirror with image data corresponding to the image to convert the reflected light into image light, a projection lens disposed between the screen and the image display device and configured to project the image light from the image display device to the screen, and a position adjustment mechanism configured to adjust a position of the lamp, the control method comprising the step, executed by a control circuit, of:
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displacing the bright point of the lamp from a first focus of the elliptic reflecting mirror to adjust the position of the lamp so as to decrease the effective light amount of the image display device, wherein the position adjustment mechanism is configured to adjust the position of the lamp such that the step of displacing the bright point of the lamp can decrease the effective light amount of the image display device to 30%. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A projector for projecting an image, comprising:
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a lamp configured to emit light; a reflecting mirror configured to reflect and condense the light from said lamp; an image display device configured to modulate the light reflected and condensed by said reflecting mirror with image data corresponding to the image to convert the reflected light into image light; and a position adjustment mechanism configured to displace a bright point of said lamp from a first focus of said reflecting mirror to adjust a position of said lamp so as to decrease an effective light amount of said image display device in response to a change in an aspect ratio of the image.
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Specification