LED drive circuit with a programmable input for LED lighting
AssigneeSystem General Corp.
InventorsTa-Yung Yang, Chuh-Ching Li, Ming-Chieh Lee, Kuo-Hsien Huang
Life of this patent
Estimating the term…
Abstract
A LED drive circuit according to the present invention comprises a controller and a programmable signal. The controller generates a switching signal coupled to switch a magnetic device for generating an output current to drive a plurality of LEDs. The programmable signal is coupled to regulate a current-control signal of the controller. The switching signal is modulated in response to the current-control signal for regulating the output current, and the level of the output current is correlated to the current-control signal.
Claims23
A LED drive circuit comprising:
- a controller generating a switching signal coupled to switch a magnetic device for generating an output current to drive a plurality of LEDs;
- and
- a programmable signal coupled to regulate a current-control signal of the controller;
- wherein the switching signal is modulated in response to the current-control signal for regulating the output current, and the level of the output current is correlated to the current-control signal.
A LED circuit comprising:
- a controller generating a switching signal coupled to switch a magnetic device for generating an output current to drive a plurality of LEDs;
- and
- a programmable signal coupled to control a reference signal of the controller;
- wherein the switching signal is modulated in response to the reference signal, and the level of the output current is correlated to the reference signal.
A LED driver comprising:
- a controller generating a switching signal coupled to switch a transformer for generating an output current connected to drive a plurality of LEDs;
- and
- a programmable signal coupled to modulate a current input signal;
- wherein the switching signal is controlled in response to the current input signal for regulating the output current.
A LED drive circuit comprising:
- a controller generating a switching signal coupled to switch a transformer for generating an output current to drive a plurality of LEDs;
- and
- a programmable signal generated in response to an input of the LED drive circuit;
- wherein the switching signal is modulated in response to the programmable signal for controlling the output current.
A LED drive circuit comprising:
- a controller, generating a switching signal coupled to switch a magnetic device for generating an output current to drive at least a LED (Light Emitting Diode);
- an input circuit, receiving a programmable signal correlated to an input of the LED drive circuit to generate a programmable current;
- wherein the programmable current is coupled to control a current input signal which is correlated to a switching current of the magnetic device;
- and
- a comparison circuit, comparing a signal sourced from an oscillator and a voltage potential generated by a current-control loop for generating a current-control signal;
- wherein the switching signal is controlled in response to the current-control signal for regulating the output current, and a level of the output current is correlated to the current-control signal.
A LED drive circuit comprising:
- A primary-side controller configured for coupling to a switch, a magnetic device, and an input source to generate a switching signal to drive the switch to generate an output current to drive at least one LED;
- wherein the primary side controller is configured to generate a programmable signal in response to a signal received from the input source and the switching signal is controlled in response to the programmable signal to regulate the output current that drives the at least one LED.
Dependencies are inferred from the claim text.