Device for image projection
First Claim
1. An arrangement for displaying images on a projection screen comprising:
- a laser which emits a laser beam;
deflecting means for deflecting the laser beam;
image-generating means connected to a controlling device for controlling said laser and said deflecting means;
said image-generating means being switchable in two operating modes, the first operating mode being the standard operating mode for projecting, and the second being an operating mode in which the laser radiation is harmless to a person disposed in the region to which the laser has access; and
a safety circuit being provided and comprising at least one sensor by which a monitored region, which is larger than the region accessible to the laser, between said image-generating means and the projection screen is monitored as to the presence of objects, wherein the image-generating means is switchable into the second operating mode by said safety circuit, in the event of an object being present.
3 Assignments
0 Petitions
Accused Products
Abstract
In an arrangement for displaying images on a projection screen, which arrangement includes a laser, which emits a laser beam, and a deflecting device, which is provided for deflecting the laser beam, and an image-generating device which is connected to a controlling device for controlling the laser and the deflecting means. The image-generating device is switchable in two operating modes, the first operating mode being the standard operating mode for projecting, and the second being an operating mode in which the laser radiation is harmless to a person disposed in the region to which the laser has access. In this regard, a safety circuit is provided and comprises at least one sensor, by which a monitored region, which is larger than the region accessible to the laser, between the image-generating means and the projection screen is monitored as to the presence of objects, wherein the image-generating means is switchable into the second operating mode by means of the safety circuit, in the event of an object being present.
107 Citations
21 Claims
-
1. An arrangement for displaying images on a projection screen comprising:
-
a laser which emits a laser beam; deflecting means for deflecting the laser beam; image-generating means connected to a controlling device for controlling said laser and said deflecting means; said image-generating means being switchable in two operating modes, the first operating mode being the standard operating mode for projecting, and the second being an operating mode in which the laser radiation is harmless to a person disposed in the region to which the laser has access; and a safety circuit being provided and comprising at least one sensor by which a monitored region, which is larger than the region accessible to the laser, between said image-generating means and the projection screen is monitored as to the presence of objects, wherein the image-generating means is switchable into the second operating mode by said safety circuit, in the event of an object being present. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
Specification