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;
a sensor configured to detect the amount of the light reflected and condensed by said elliptic reflecting mirror;
a lamp power supply configured to supply power to said lamp to drive said lamp; and
a control circuit configured to successively increase the power to be supplied from said lamp power supply to said lamp until after a variation value of the amount of the reflected light detected by said sensor becomes equal to or lower than a predetermined threshold value.
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; a sensor configured to detect the amount of the light reflected and condensed by the elliptic reflecting mirror; a lamp power supply configured to supply power to the lamp to drive the lamp; and a control circuit configured to successively increase the power to be supplied from the lamp power supply to the lamp until after a variation value of the amount of the reflected light detected by the sensor becomes equal to or lower than a predetermined threshold value.
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Citations
7 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; a sensor configured to detect the amount of the light reflected and condensed by said elliptic reflecting mirror; a lamp power supply configured to supply power to said lamp to drive said lamp; and a control circuit configured to successively increase the power to be supplied from said lamp power supply to said lamp until after a variation value of the amount of the reflected light detected by said sensor becomes equal to or lower than a predetermined threshold value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A control method for a projector for projecting 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 said lamp, a sensor configured to detect the amount of the light reflected and condensed by said elliptic reflecting mirror, a lamp power supply configured to supply power to said lamp to drive said lamp, and a control circuit configured to control said lamp power supply, the control method comprising the step, executed by said control circuit, of:
successively increasing the power to be supplied from said lamp power supply to said lamp until after a variation value of the amount of the reflected light detected by said sensor becomes equal to or lower than a predetermined threshold value.
Specification