Illumination sphere with intelligent LED lighting units in scalable daisy chain with interchangeable filters

• US 8,988,599 B2
• Filed: 08/31/2010
• Issued: 03/24/2015
• Est. Priority Date: 08/31/2010
• Status: Active Grant

• Current Assignee: University of Southern California
• Original Assignee: University of Southern California
• Inventors: Yu, Xueming, Bolas, Mark, Fyffe, Graham, Busch, Jay, Peers, Pieter, Ghosh, Abhijeet, Debevec, Paul
• Primary Examiner(s): Tran, Sinh
• Assistant Examiner(s): MONK, MARK T
• Application Number:
  US12/872,433
• Publication Number:
  US 20120050606A1
• Time in Patent Office: 1,666 Days
• Field of Search: 348/370, 348/371, 348/375, 313/112, 35948401-49401, 362/3, 362/11, 362/13, 362 16- 18, 362272-287, 362319-324, 362/393, 315312-325, 315149-157, 352/45
• US Class Current: 348/371
• CPC Class Codes: G03B 15/07 Arrangements of lamps in studios
• CPC Class Codes: G03B 2215/0557 Multiple units, e.g. slave-unit
• CPC Class Codes: H04N 23/56 provided with illuminating means
• CPC Class Codes: H04N 23/90 Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: H05B 45/30 Driver circuits
• CPC Class Codes: H05B 45/325 Pulse-width modulation [PWM]
• CPC Class Codes: H05B 47/11 by determining the brightness or colour temperature of ambient light
• CPC Class Codes: H05B 47/18 via data-bus transmission
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

A controllable lighting system may include a plurality of light source groups, a group controller for each light source group, a master controller, and a network communication system. Each group controller may be configured to control the light sources in its light source group based on a group control command. The master controller may be configured to receive a master control command relating to the light sources and to issue a group control command to each of the group controllers that collectively effectuate compliance with the master control command. The network communication system may be configured to communicate the group control commands from the master controller to the group controllers.

Claims

1. A controllable lighting system comprising multiple light source groups, each light source group including:

multiple light sources;

a polarization filter oriented to filter light emitted by each of the light sources, but not to filter light emitted by the other light sources, wherein;

each polarization filter polarizes light in a way that is different from the way the other polarization filters polarize light; and

the light sources and their associated polarization filters are oriented so as to cause light from each polarization filter to be added to light from the other polarization filters, thereby creating a consolidate light having a polarization that is a function of the different polarizations of the different polarization filters and the intensity of the light from each of the light sources; and

a controller that;

receives different polarization control signals, each indicative of a different desired polarization of light from the light source group; and

in response to each of the different received polarization control signals, sets the intensity of each of the light sources within the light source group to an amount that causes the consolidated light from all of the filtered light sources to have the desired polarization indicated by the polarization control signal,

wherein the orientation of each polarization filter is not changed by the controller at least between the time each polarization control signal is received by the controller and the time the controller sets the intensity of each of the light sources to the amount that causes the consolidated light from all of the filtered light sources to have the desired polarization.

2. The controllable lighting system of claim 1 wherein the angle of polarization of one of the polarization filters is different than the angle of polarization of another of the polarization filters.

3. The controllable lighting system of claim 1 wherein there are at least three light sources and at least three polarization filters.

4. The controllable lighting system of claim 3 wherein there are at least four light sources and at least four polarization filters.

5. The controllable lighting system of claim 4 wherein one of the polarization filters provides a circular polarization.

6. The controllable lighting system of claim 1 wherein each controller is a slave controller and wherein each polarization control signal is a slave polarization control signal, and further comprising a master controller that:

receives a master polarization control signal indicative of one of several different desired light polarizations; and

causes a slave polarization control signal to be delivered to each of the slave controllers indicative of the desired light polarization indicated by the master polarization control signal.

7. The controllable lighting system of claim 1 wherein the multiple light source groups are distributed throughout the interior surface of a geodesic lighting sphere and oriented to direct their light towards the center of the geodesic lighting sphere.

8. A controllable lighting system comprising multiple light source groups, each light source group including:

at least two polarization filters;

multiple light sources, each providing a light source output; and

a control system that controls the intensity of each of the multiple light sources, wherein;

at least two of the light sources, but not all of the light sources, are each filtered by one of the at least two polarization filters;

the outputs of all of the light sources are directed so as to substantially combine to form a consolidated light source output; and

the control system has a configuration that;

receives first information indicative of a first polarization that the consolidated light source output should have and controls the intensity of each of the light sources so as to cause the consolidated light source output to have the first polarization without changing the orientation of the at least one polarization filter between the time the first information is received and the time that the control system causes the consolidated light source output to have the first polarization; and

receives second information indicative of a second polarization that is different than the first polarization that the consolidated light source output should have and controls the intensity of each of the light sources so as to cause the consolidated light source output to have the second polarization, again without changing the orientation of the at least one polarization filter between the time the second information is received and the time that the control system causes the consolidated light source output to have the first polarization.

9. The controllable lighting system of claim 8 wherein at least one of the light sources comprises multiple light sources.