LED LIGHTING EQUIPMENT

• US 20110025206A1
• Filed: 07/28/2010
• Published: 02/03/2011
• Est. Priority Date: 07/29/2009
• Status: Active Grant

• Current Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Inventors: Hiramatsu, Takuro, Kubota, Hiroshi, Hiraoka, Toshiyuki, Terasaka, Hiroshi, Kamata, Masahiko
• Granted Patent: US 8,415,889 B2
• Time in Patent Office: Days
• US Class Current: 315/51
• 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 having 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; and

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

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 power source includes a voltage doubler rectifier circuit having a rectification circuit and a smoothing capacitor,

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, which includes an inductor connected to the switching element in series,

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

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

3. 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 power source includes a full-wave rectifier circuit having a rectification circuit and smoothing capacitor,

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, which includes an inductor connected to the switching element in series,

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

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

4. 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 power source includes a full-wave rectifier circuit and a voltage doubler rectifier circuit each having a rectification circuit, a smoothing capacitor and selection element for activating one of the rectifier circuits,

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, which includes an inductor connected to the switching element in series,

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

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