LED LIGHTING DEVICE AND ILLUMINATION APPARATUS

• US 20110057564A1
• Filed: 09/01/2010
• Published: 03/10/2011
• Est. Priority Date: 09/04/2009
• Status: Abandoned Application

• Current Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Inventors: OTAKE, HIROKAZU
• Application Number:
  US12/873,348
• Publication Number:
  US 20110057564A1
• Time in Patent Office: Days
• US Class Current: 315/51
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 45/3725 Switched mode power supply [SMPS]
• CPC Class Codes: H05B 45/375 using buck topology
• CPC Class Codes: Y02B 20/00 Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

The present invention provides a rectifying circuit for rectifying AC voltage that is input from an AC source via a phase control type dimmer; a converter for converting DC output voltage of the rectifying circuit and lighting an LED; a positive characteristic feed-forward controlling unit for monitoring the AC voltage and changing the output current of the converter in accordance with a value of the AC voltage; and a positive characteristic feed-forward control limiting unit for, when the AC voltage reaches a predetermined value, limiting control performed by the positive characteristic feed-forward controlling unit.

Claims

1. An LED lighting device comprising:

a rectifying circuit for rectifying AC voltage that is input from an AC source via a phase control type dimmer;

a converter for converting DC output voltage of the rectifying circuit and lighting an LED;

a positive characteristic feed-forward controlling unit for monitoring the AC voltage and changing the output current of the converter in accordance with a value of the AC voltage; and

a positive characteristic feed-forward control limiting unit for, when the AC voltage reaches a predetermined value, limiting control performed by the positive characteristic feed-forward controlling unit.

2. An illumination apparatus comprising:

an illumination apparatus main body;

the LED lighting device of claim 1 disposed on the illumination apparatus main body; and

the LED connected to an output end of the converter of the LED lighting device and supported by the illumination apparatus main body.