Intensity changing with reduced flicker for digitally-controlled lighting
DCFirst Claim
1. A system for changing light source intensity, comprising:
- an input interface to;
receive a command intensity for a light source, wherein the light source has a current intensity, and wherein an intensity of the light source is ramped toward the command intensity from the current intensity automatically; and
a controller configured to;
determine a non-linear curve for the intensity of the light source, wherein the non-linear curve is based at least in part on the command intensity and the light source intensity, and wherein at least a portion of the non-linear curve includes a beginning slope that is steeper than an end slope of the non-linear curve; and
cause a change of a light source intensity by ramping over a time interval, wherein the light source intensity targets conforming to the non-linear curve for the intensity of the light source, and wherein beginning causing the change of the light source intensity starts before completion of determining the non-linear curve for the intensity of the light source; and
a memory coupled to the controller and configured to store an intensity value.
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Abstract
A system for changing a light source intensity comprises a controller, an input interface, and a memory. The input interface is configured to receive a command intensity for a light source, wherein the light source has a current intensity, and wherein an intensity of the light source is ramped toward the command intensity from the current intensity automatically. The controller is configured to determine a non-linear curve for the intensity of the light source, wherein at least a portion of the non-linear curve includes a beginning slope that is steeper than an end slope and to cause a change of a light source intensity by ramping over a time interval, wherein the light source intensity targets conforming to the non-linear curve for the intensity of the light source. The memory is coupled to the processor and configured to store an intensity value.
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Citations
21 Claims
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1. A system for changing light source intensity, comprising:
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an input interface to; receive a command intensity for a light source, wherein the light source has a current intensity, and wherein an intensity of the light source is ramped toward the command intensity from the current intensity automatically; and a controller configured to; determine a non-linear curve for the intensity of the light source, wherein the non-linear curve is based at least in part on the command intensity and the light source intensity, and wherein at least a portion of the non-linear curve includes a beginning slope that is steeper than an end slope of the non-linear curve; and cause a change of a light source intensity by ramping over a time interval, wherein the light source intensity targets conforming to the non-linear curve for the intensity of the light source, and wherein beginning causing the change of the light source intensity starts before completion of determining the non-linear curve for the intensity of the light source; and a memory coupled to the controller and configured to store an intensity value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A computer program product for changing light source intensity, the computer program product being embodied in a computer and comprising computer instructions for:
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receiving a command intensity for a light source, wherein the light source has a current intensity, and wherein an intensity of the light source is ramped toward the command intensity from the current intensity automatically; determining a non-linear curve for the intensity of the light source, wherein the non-linear curve is based at least in part on the command intensity and the light source intensity, and wherein at least a portion of the non-linear curve includes a beginning slope that is steeper than an end slope of the non-linear curve; and causing a change of a light source intensity by ramping over a time interval, wherein the light source intensity targets conforming to the non-linear curve for the intensity of the light source, and wherein beginning causing the change of the light source intensity starts before completion of determining the non-linear curve for the intensity of the light source.
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16. A method for changing light source intensity, comprising:
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receiving a command intensity for a light source, wherein the light source has a current intensity, and wherein an intensity of the light source is ramped toward the command intensity from the current intensity automatically; determining a non-linear curve for the intensity of the light source, wherein the non-linear curve is based at least in part on the command intensity and the light source intensity, and wherein at least a portion of the non-linear curve includes a beginning slope that is steeper than an end slope of the non-linear curve; and causing a change of a light source intensity by ramping over a time interval, wherein the light source intensity targets conforming to the non-linear curve for the intensity of the light source, and wherein beginning causing the change of the light source intensity starts before completion of determining the non-linear curve for the intensity of the light source.
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17. A system for changing light source intensity, comprising:
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an input interface to; receive a command intensity for a light source, wherein the light source has a current intensity, and wherein an intensity of the light source is ramped toward the command intensity from the current intensity automatically; and a controller configured to; determine a non-linear curve for the intensity of the light source, wherein at least a rising portion of the non-linear curve includes a beginning slope that is steeper than an end slope of the portion of the non-linear curve; cause a change of a light source intensity by ramping over a time interval, wherein the light source intensity targets conforming to the non-linear curve for the intensity of the light source, and wherein beginning causing the change of the light source intensity starts before completion of determining the non-linear curve for the intensity of the light source; and a memory coupled to the controller and configured to store an intensity value. - View Dependent Claims (18, 19, 20, 21)
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Specification