POWER SUPPLY AND METHOD FOR ELECTRIC LIGHTING DEVICE
First Claim
1. A power supply system for controlling supply of power to an electric lighting device, said system comprising:
- a first function generator for generating a light control signal, dependent upon a first mathematical function of a root mean square (RMS) value of a received input voltage;
a second function generator for generating a current control signal, dependent upon a second mathematical function establishing a ratio of instantaneous input voltage to instantaneous input current as a mathematical function of the RMS value of said received input voltage, wherein said first function and second function are independent of one another; and
a power supply for presenting a light power signal to said electric lighting device and for presenting a load power to a dissipative load, dependent upon said light control signal, said current control signal, and said received input voltage.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed herein are a power control system (110) and method for a light emitting diode (LED) lighting device. The system includes a rectifier (125) to rectify an input voltage, a squaring module (145) for squaring the rectified input voltage to produce a squared input voltage value; a filter (155) to filter said squared input voltage; a first function generator (160) for applying a first function to determine a light control signal (165); a second function generator (170) for applying a second function to determine a conductance factor (175), wherein said first function and said second function are independent functions of the root mean square (RMS) value of said input voltage; a multiplier (180) for multiplying said first multiplier signal with said rectified input signal to determine a current control signal (185); and a power supply (190) for determining an input light power to said LED lighting device and an input load power to a dissipative load (120), dependent upon said light control signal (165), said current control signal (185) and said rectified input voltage (140).
24 Citations
18 Claims
-
1. A power supply system for controlling supply of power to an electric lighting device, said system comprising:
-
a first function generator for generating a light control signal, dependent upon a first mathematical function of a root mean square (RMS) value of a received input voltage; a second function generator for generating a current control signal, dependent upon a second mathematical function establishing a ratio of instantaneous input voltage to instantaneous input current as a mathematical function of the RMS value of said received input voltage, wherein said first function and second function are independent of one another; and a power supply for presenting a light power signal to said electric lighting device and for presenting a load power to a dissipative load, dependent upon said light control signal, said current control signal, and said received input voltage. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A power control system for a light emitting diode (LED) lighting device, said system comprising:
-
a first function generator for utilising a first function to generate a light control signal dependent upon a received input voltage; a second function generator for utilising a second function to generate a conductance factor dependent upon said received input voltage, wherein said first function and said second function are independent functions of the root mean square (RMS) value of said input voltage; a multiplier for determining a current control signal dependent upon said first multiplier signal and said received input voltage; and a power supply for generating an input light power to present to said electric lighting device and an input load power to present to a dissipative load, dependent upon said light control signal, said current control signal, and said received input voltage.
-
-
8. A method for controlling power supplied to a light emitting diode (LED) lighting device, said method comprising the steps of:
-
determining a light control signal dependent upon a received input voltage and a first function, wherein said first function is a function of the root mean square (RMS) value of said received input voltage; determining a conductance factor dependent upon said received input voltage and a second function, wherein said second function is a function of the RMS value of said received input voltage, said first and second functions being independent of one another; determining a current control signal dependent upon said conductance factor and said received input voltage; and generating an input light power to present to said lighting device and an input load power to present to a dissipative load, dependent upon said light control signal, said current control signal, and said received input voltage. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
-
-
16. A power control system for a light emitting diode (LED) lighting device, said system comprising:
-
a rectifier for rectifying a received input voltage; a squaring module for squaring said rectified input voltage to determine a squared voltage value proportional to the square of the received input voltage; a filter to filter said squared input voltage and produce a steady state signal; a first function generator for applying a first function to the steady state signal to determine a light control signal; a second function generator for applying a second function to the steady state signal to determine a conductance factor, wherein said first function and said second function are independent functions of the root mean square (RMS) value of said input voltage; a multiplier for multiplying said conductance factor with said rectified input signal to determine a current control signal; and a power supply for producing an input light power to said LED lighting device and an input load power to a dissipative load, dependent upon each of said light control signal, said current control signal, and said rectified input voltage. - View Dependent Claims (17)
-
-
18. A method for controlling power supplied to a light emitting diode (LED) lighting device, said method comprising the steps of:
-
rectifying a received input voltage waveform; squaring said rectified input voltage waveform to determine a squared voltage value proportional to the square of the received input voltage; filtering said squared input voltage to produce a steady state signal; applying a first function to the steady state signal to determine a light control signal, dependent upon said received input voltage; applying a second function to the steady state signal to determine a conductance factor, dependent upon said received input voltage, wherein said first function and said second function are independent functions of the root mean square (RMS) value of said input voltage; multiplying said conductance factor and said rectified input voltage waveform to determine a current control signal; and generating an input light power for presenting to said LED lighting device and an input load power for presenting to a dissipative load, dependent upon said light control signal, said current control signal, and said rectified input voltage.
-
Specification