Display apparatus for vehicle with means to prevent solar heating thereof
First Claim
1. A display apparatus for displaying a display image on a windshield of a vehicle, comprising:
- a display means for displaying information;
converging lens means for projecting a display image of said display means on said windshield of said vehicle, said converging lens means having a focus within which said display means is located and being positioned between said windshield and said display device;
light detecting means for detecting an intensity of external light entering through said converging lens means from the side thereof opposite to said display means, said light detecting means being disposed between said converging lens means and said display means; and
light intercepting means positioned between said converging lens means and said display means for moving at a displacement between a first position in which external light entering through said converging lens means is prevented from being directed to said display device when said display means is an inoperative condition and when said light detected by said detecting means has an intensity higher than a predetermined level, and a second position in which said external light is directed to said display device when said external light detected by said light detecting means has an intensity lower than said predetermined level.
1 Assignment
0 Petitions
Accused Products
Abstract
A display apparatus for a vehicle of the type wherein a display image of a display device located near a focus of an optical system is projected on a front glass of the vehicle so that a virtual image of the display image may be focused at a position forwardly of the front glass. In the display apparatus, when external light entering the optical system has an intensity higher than a predetermined level, a light intercepting means prevents the external light from being received by the display device, thereby preventing thermal destruction of the display device which may possibly be caused by heat given to the display device by intense external light such as the sunlight which is condensed by the optical system.
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Citations
12 Claims
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1. A display apparatus for displaying a display image on a windshield of a vehicle, comprising:
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a display means for displaying information; converging lens means for projecting a display image of said display means on said windshield of said vehicle, said converging lens means having a focus within which said display means is located and being positioned between said windshield and said display device; light detecting means for detecting an intensity of external light entering through said converging lens means from the side thereof opposite to said display means, said light detecting means being disposed between said converging lens means and said display means; and light intercepting means positioned between said converging lens means and said display means for moving at a displacement between a first position in which external light entering through said converging lens means is prevented from being directed to said display device when said display means is an inoperative condition and when said light detected by said detecting means has an intensity higher than a predetermined level, and a second position in which said external light is directed to said display device when said external light detected by said light detecting means has an intensity lower than said predetermined level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification