LED lighting equipment

• US 8,415,889 B2
• Filed: 07/28/2010
• Issued: 04/09/2013
• Est. Priority Date: 07/29/2009
• Status: Expired due to Fees

• Current Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Inventors: Hiramatsu, Takuro, Kamata, Masahiko, Kubota, Hiroshi, Terasaka, Hiroshi, Hiraoka, Toshiyuki
• Primary Examiner(s): TRAN, ANH Q
• Application Number:
  US12/845,330
• Publication Number:
  US 20110025206A1
• Time in Patent Office: 986 Days
• Field of Search: None
• US Class Current: 315/200.R
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21Y 2103/33 annular
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/375 using buck topology

Abstract

Certain embodiments provide an LED lighting equipment including a lighting main body. An LED power device has a DC power source and a DC-DC converter having an input terminal connected to the DC power source and the DC-DC converter having an output terminal. An LED light source has a board and a plurality of LED packages; each including a plurality of LED chips connected in series. The LED packages are mounted on the board and connected in series to the output terminal of the DC-DC converter.

Claims

1. An LED lighting equipment, comprising;

a lighting main body;

an LED power device mounted on the lighting main body and including a DC power source and a DC-DC converter, the DC-DC converter including an input terminal connected to the DC power source and an output terminal; and

an LED light source including a board and a plurality of LED packages, each of the LED packages including a plurality of LED chips connected in series, the LED packages being mounted on the board and connected in series to the output terminal of DC-DC converter;

wherein the DC power source includes a full-wave rectifier circuit and a voltage doubler rectifier circuit, the full-wave rectifier circuit and the voltage doubler rectifier circuit including a rectification circuit, a smoothing capacitor and selection element configured for implementing one of the rectifier circuits.

2. The LED lighting equipment according to claim 1, wherein:

the LED power device includes an output capacitor connected to the output terminal of the DC-DC converter;

the DC-DC converter is a step-down chopper including a switching element, a first circuit, and a second circuit;

the first circuit is connected between the input terminal of the DC-DC converter and the output terminal of the DC-DC converter, and the first circuit includes an inductor connected to the switching element in series;

the second circuit is connected with the output terminal of the DC-DC converter, and the second circuit includes a series circuit of the inductor and a free-wheel diode; and

the output capacitor is configured to operate so that the operating voltage of the output capacitor is lower than an operating voltage of the smoothing capacitor during operation.