LED device and lighting device including the same
AssigneeSamsung Electronics Co., Ltd.
InventorsBongjin Lee, June Jang
Life of this patent
Estimating the term…
Abstract
A light emitting diode (LED) device is provided. The LED device a first LED string configured to emit light having a first color temperature; a second LED string connected to the first LED string in parallel, and configured to emit light having a second color temperature different from the first color temperature; a controller configured to generate a control signal based on a control command received from an external controller; a switching circuit configured to control brightness of any one or any combination of the first LED string and the second LED string based on the control signal; and a power supply configured to generate an internal power voltage for operation of the controller and the switching circuit.
Claims19
A light emitting diode (LED) device comprising:
- a first LED string including first LEDs emitting light having a first color temperature;
- a second LED string connected to the first LED string in parallel, and including second LEDs emitting light having a second color temperature different from the first color temperature;
- a smart controller including a controller configured to generate a control signal based on a control command received from an external controller, a switching circuit configured to control brightness of any one or any combination of the first LED string and the second LED string based on the control signal, a power supply configured to generate an internal power voltage for operation of the controller and the switching circuit, and a dimming controller including a switching unit and a switch control circuit,
- wherein each of a plurality of dimming control switches included in the switching unit is connected to a node between the first LEDs and a node between the second LEDs.
A lighting device comprising:
- an LED driver configured to generate driving power using alternating current (AC) power, and output the driving power through a first driving node and a second driving node;
- a plurality of LED strings comprising a first LED string connected between the first driving node and a first LED output node, and a second LED string connected between the first driving node and a second LED output node, the first LED string, being configured to emit light having a first color temperature and the second LED string being configured to emit light having a second color temperature;
- and
- a smart controller connected to the first driving node, the second driving node, the first LED output node and the second LED output node, between the LED driver and the plurality of LED strings,
- wherein the smart controller comprises a switching circuit connected to the first LED output node, the second LED output node and the second driving node, and is configured to adjust brightness of any one or any combination of the first LED string and the second LED string,
- wherein the smart controller comprises a dimming controller including a switching unit and a switch control circuit, and each of a plurality of dimming control switches included in the switching unit is connected to a node between the first LEDs and a node between the second LEDs.
An LED device comprising:
- a plurality of LEDs directly connected to at least a portion of a plurality of output terminals of an output harness of an LED driver;
- a power supply connected to a first output terminal of the plurality of output terminals and configured to generate a first internal power voltage and a second internal power voltage using a driving power received from the LED driver via the first output terminal;
- a controller configured to operate using the first internal power voltage and generate a PWM control signal based on a control command received from an external controller;
- a switching circuit connected between one of the plurality of LEDs and a second output terminal of the plurality of output terminals, and configured to operate using the second internal power voltage and adjust brightness of a portion of the plurality of LEDs based on the PWM control signal;
- a thermoelectric circuit configured to output electrical energy by heat generated from the plurality of LEDs;
- and
- a battery being charged by the electrical energy from the thermoelectric circuit.
Dependencies are inferred from the claim text.