Projector cooling system with time dependent temperature threshold
First Claim
1. An image projection apparatus that projects an image using light from a light source, comprising:
- a temperature detector that detects a temperature inside of the apparatus; and
a controller that performs a protection operation when the temperature detected by the temperature detector is higher than a predetermined temperature,wherein the controller measures an elapsed time from when a power of the apparatus or the light source is turned on, and changes the predetermined temperature in accordance with the elapsed time.
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Accused Products
Abstract
The image projection apparatus includes a temperature detector that detects a temperature inside of the apparatus, and a controller that performs a protection operation when the temperature detected by the temperature detector is higher than a predetermined temperature. The controller measures an elapsed time from when a power of the apparatus is turned on, and changes the predetermined temperature in accordance with the elapsed time. This apparatus can avoid mistaken activation or inactivation of a protection function at the time of re-lighting of the light source due to the influence of the residual heat after the light source is turned off.
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Citations
7 Claims
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1. An image projection apparatus that projects an image using light from a light source, comprising:
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a temperature detector that detects a temperature inside of the apparatus; and a controller that performs a protection operation when the temperature detected by the temperature detector is higher than a predetermined temperature, wherein the controller measures an elapsed time from when a power of the apparatus or the light source is turned on, and changes the predetermined temperature in accordance with the elapsed time. - View Dependent Claims (2, 3, 4, 5)
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6. An image projection apparatus that projects an image using light from a light source, comprising:
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a temperature detector that detects a temperature inside of the apparatus; and a controller that performs a protection operation when the temperature detected by the temperature detector is higher than a predetermined temperature, wherein the controller measures an elapsed time from when a power of the apparatus or the light source is turned off to when the power of the apparatus or the light source is next turned on, and changes the predetermined temperature in accordance with the elapsed time. - View Dependent Claims (7)
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Specification