LED module

Patent metadata

Field	Value
Publication number	US-9370070-B2
Application number	US-201414465723-A
Country	US
Kind code	B2
Filing date	Aug 21, 2014
Priority date	Sep 15, 2005
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

An improved LED module that is thermally self-stabilizing, and that is able to be retrofitted into an existing flashlight is provided. In one embodiment, the LED module includes a light emitting diode, an amplifying circuit and a microchip. The amplifying circuit includes a temperature sensing device to sense heat from the light emitting diode. The output of the amplifying circuit is input to the microchip which output to a switching device that regulates energy that is delivered to the light emitting diode. The switching device may be part of a boosting circuit, a bucking circuit or an inverting circuit.

First claim

What is claimed is:

1. A lighting module for flashlights, said lighting module comprising:
a light emitting diode;
an amplifying circuit including a temperature sensing device, said temperature sensing device arranged to sense heat from said light emitting diode; and
a microchip having an input and an output, said amplifying circuit coupled to said input, said output coupled to a switching device that regulates energy delivered to the tight emitting device.

2. The lighting module of claim 1 , wherein said switching device is part of a boosting circuit.

3. The lighting module of claim 1 , wherein said switching device is part of a bucking circuit.

4. The lighting module of claim 1 , wherein said switching device is part of an inverting circuit.

5. The lighting module of claim 1 , wherein said switching device is a MOSFET.

6. The lighting module of claim 1 , wherein said microchip is configured to regulate the energy that is delivered to said light emitting diode by adjusting the switching duty cycle of said switching device.

7. The lighting device of claim 1 , wherein said temperature sensing device is comprised of a thermistor having a negative resistance/temperature coefficient.

8. The lighting device of claim 1 , wherein said temperature sensing device is comprised of a thermistor having a negative resistance/temperature coefficient.

9. The lighting device of claim 1 , wherein said temperature sensing device is comprised of a voltage output temperature sensor.

Assignees

• Mag Instr Inc

Inventors

• West Stacey H

Classifications

• F21V23/0414

  specially adapted to be used with portable lighting devices · CPC title

• F21Y2101/00

  Point-like light sources · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21V23/0457

  the sensor sensing the operating status of the lighting device, e.g. to detect failure of a light source or to provide feedback to the device · CPC title

• F21L4/005 Primary

  the device being a pocket lamp (F21L4/022, F21L4/045, F21L4/085 take precedence) · CPC title