Dump path light intensity sensing in light projector
First Claim
Patent Images
1. A light projection system comprising:
- a projection subsystem configured at least to project an image;
an image forming subsystem comprising;
a plurality of light source subsystems, each configured at least to generate a single color channel of a plurality of color channels of light, anda plurality of light modulation subsystems, each associated with a light source subsystem and configured at least to cause the light it receives from its associated light source subsystem to follow either a light dump path or an image path in a manner consistent with image data, the light dump path not leading to the projection subsystem, and the image path leading to the projection subsystem; and
a light-intensity-measurement subsystem configured at least to determine an intensity of each of the plurality of color channels of light and comprising at least one light-intensity sensor in at least one light dump path.
18 Assignments
0 Petitions
Accused Products
Abstract
In a light projection system, potentially hierarchical levels of light intensity control ensure proper laser-light output intensity, color channel intensity, white point, left/right image intensity balancing, or combinations thereof. The light projection system can include a light intensity sensor in an image path, in a light-source subsystem light-dump path, in a light-modulation subsystem light-dump path, in a position to measure light leaked from optical components, or combinations thereof.
-
Citations
12 Claims
-
1. A light projection system comprising:
-
a projection subsystem configured at least to project an image; an image forming subsystem comprising; a plurality of light source subsystems, each configured at least to generate a single color channel of a plurality of color channels of light, and a plurality of light modulation subsystems, each associated with a light source subsystem and configured at least to cause the light it receives from its associated light source subsystem to follow either a light dump path or an image path in a manner consistent with image data, the light dump path not leading to the projection subsystem, and the image path leading to the projection subsystem; and a light-intensity-measurement subsystem configured at least to determine an intensity of each of the plurality of color channels of light and comprising at least one light-intensity sensor in at least one light dump path. - View Dependent Claims (2, 3, 4)
-
-
5. A method for measuring light intensity generated by a light projection system, the method comprising:
-
generating light from a light source subsystem; directing the light, by a light modulation subsystem, along either an image path or a light dump path in a manner consistent with image data, the image path leading to a projection subsystem configured at least to project an image, and the light dump path not leading to the projection subsystem; and determining an intensity of the light with in image sensor in the light dump path, wherein the light is stereoscopic light comprising a left-eye light beam and a right-eye light beam that follow a same path along the light-dump path when so directed by the light modulation subsystem. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
-
Specification