LED lighting system with accurate current control

A method for controlling a current in a light emitting diode (LED) system of an LED lighting system comprising:

• duty cycle modulating the LED current time period at a rate of greater than fifty (50) Hz;
• calculating, based on the current and an active time period of an LED current time period, an actual charge amount delivered to the LED system;
• and
• utilizing the actual charge amount to modify and provide a desired target charge amount to be delivered during a future active time period of the LED current time period.

A current controller for controlling current to a light emitting diode (LED) system for an LED lighting system comprising:

• components for receiving a dimming level signal from a dimming controller and for controlling and providing, based on the dimming level signal, an amount of drive current for driving the LED system;
• and
• wherein the components are at least part of an LED controller to:
• calculate, based on the current and an active time period of the LED current time period, an actual charge amount delivered to the LED system wherein the LED current time period is duty cycle modulated at a rate of greater than fifty (50);
• and
• utilize the actual charge amount to modify and provide a desired target charge amount to be delivered during a future active time period of the LED current time period.

A method for controlling current to a light emitting diode (LED) system for an LED lighting system comprising:

• receiving a dimming level signal from a dimming controller;
• and
• controlling and providing, based on the dimming level signal, an amount of drive current for driving the LED system;
• and
• wherein the receiving and controlling and providing steps are at least part of an LED controller method to:
• duty cycle modulate an LED current time period at a rate of greater than fifty (50) Hz;
• calculate, based on the current and an active time period of the LED current time period, an actual charge amount delivered to the LED system;
• and
• utilize the actual charge amount to modify and provide a desired target charge amount to be delivered during a future active time period of the LED current time period.

A delta-sigma modulated dimming controller for controlling a dimming level of a light emitting diode (LED) system for an LED lighting system comprising:

• components for receiving a dimming control signal and driving a dimming level signal to a current controller for providing a current for driving the LED system;
• and
• wherein the components are at least part of an LED controller to:
• calculate, based on the current and an active time period of an LED current time period, an actual charge amount delivered to the LED system wherein the LED current time period is duty cycle modulated at a rate of greater than fifty (50) Hz;
• and
• utilize the actual charge amount to modify'and provide a desired target charge amount to be delivered during a future active time period of the LED current time period.

A method for controlling a dimming level of a light emitting diode (LED) system for an LED lighting system utilizing a delta sigma modulator comprising:

• receiving a dimming control signal;
• and
• driving a dimming level signal to a current controller for providing a current for driving the LED system;
• and
• wherein the receiving and driving steps are at least part of an LED controller method to:
• duty cycle modulate the LED current time period at a rate of greater than fifty (50) Hz;
• calculate, based on the current and an active time period of an LED current time period, an actual charge amount delivered to the LED system;
• and
• utilize the actual charge amount to modify and provide a desired target charge amount to be delivered during a future active time period of the LED current time period.