Stochastic signal density modulation for optical transducer control
First Claim
Patent Images
1. An apparatus, comprising:
- a controllable current supply coupled to a light-emitting diode; and
a controller coupled to the controllable current supply, wherein the controller is configured to provide a stochastic control signal to the controllable current supply, the stochastic control signal having a selected stochastic signal density to control a light intensity output of the light-emitting diode.
5 Assignments
0 Petitions
Accused Products
Abstract
A controller for optical transducers uses stochastic signal density modulation to reduce electromagnetic interference.
-
Citations
30 Claims
-
1. An apparatus, comprising:
-
a controllable current supply coupled to a light-emitting diode; and a controller coupled to the controllable current supply, wherein the controller is configured to provide a stochastic control signal to the controllable current supply, the stochastic control signal having a selected stochastic signal density to control a light intensity output of the light-emitting diode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A method, comprising:
-
providing a controllable current for a light emitting diode; and stochastically controlling the current to select a light intensity output from the light emitting diode. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. An apparatus, comprising;
-
means for increasing the dimming frequency of a dimming signal for an optical transducer; and means for controlling the optical transducer with the dimming signal. - View Dependent Claims (25, 26)
-
-
27. A system, comprising:
-
a plurality of controllable current supplies coupled to a plurality of optical transducers; and a plurality of controllers coupled to the plurality of controllable current supplies, wherein each controller of the plurality of controllers is configured to provide a stochastic control signal to one of the controllable current supplies, the stochastic control signal having a selected stochastic signal density to control a light intensity output of one of the plurality of optical transducers. - View Dependent Claims (28, 29, 30)
-
Specification