System for balancing the brightness of 2D and 3D cinema presentation
First Claim
1. A method for balancing brightness in a projection system, comprising:
- compensating for non-uniform luminance in a projection system by locating a filter in at least a first light path of the projection system by attenuating the luminance in at least a first operating mode of the projection system.
4 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is a system for balancing brightness in cinema presentation. The brightness between 2D and 3D mode in cinema presentation may be substantially maintained without a substantial change in projector lamp current when switching between the two presentation modes. A dimmer can be engaged which allows the light in at least one path to be attenuated during 2D operation. The dimmer can be activated in any number of ways, including, but not limited to, mechanically, electromechanically, or electro-optically, any combination thereof, and so forth. The dimmer may be inserted in one light path and may be physically removed from the light path during 3D operation in order to maximize 3D efficiency.
4 Citations
21 Claims
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1. A method for balancing brightness in a projection system, comprising:
compensating for non-uniform luminance in a projection system by locating a filter in at least a first light path of the projection system by attenuating the luminance in at least a first operating mode of the projection system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for balancing brightness in a projection system, comprising:
a filter that compensates for non-uniform luminance in a projection system, wherein the filter is located in at least a first light path of a projection system in at least a first operating mode of the projection system, further wherein the filter attenuates the luminance in the at least first operating mode of the projection system. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An optical system for balancing the brightness of a projection system, comprising:
a filter that increases light transmission with increasing distance relative to the center of the filter in a first mode and that substantially maintains transmitted peak brightness in a second mode.
Specification