LED lamp device

• US 5,442,258 A
• Filed: 05/04/1994
• Issued: 08/15/1995
• Est. Priority Date: 05/04/1994
• Status: Expired due to Fees

• Current Assignee: Hakuyo Denkyu Kabushiki Kaisha
• Original Assignee: Hakuyo Denkyu Kabushiki Kaisha
• Inventors: Shibata, Yoshihiko
• Primary Examiner(s): Lee, Benny
• Assistant Examiner(s): Ratliff, Reginald A.
• Application Number:
  US08/237,862
• Time in Patent Office: 468 Days
• Field of Search: 315/129, 315/136, 315/200 A, 315/209 R, 315/185 S
• US Class Current: 315/129
• 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: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/345 Current stabilisation; Maintaining constant current
• CPC Class Codes: H05B 45/37 Converter circuits

Abstract

An LED lamp device is made up of an LED emitter, a pair of DC voltage input terminals, a circuit connecting between the LED emitter and the pair of DC voltage input terminals, and at least one constant-voltage diode and at least one constant-current diode which are interposed in the circuit. The LED lamp device further has an adapter for mounting on one end thereof the LED emitter, and a base fixed to the other end of the adapter. The lighting parts such as the constant-voltage diode or the like are contained inside the adapter and the base.

Claims

1. An LED lamp device comprising:

an LED emitter;

a pair of DC voltage input terminals;

a circuit connecting between said LED emitter and said pair of DC voltage input terminals; and

at least one constant-voltage diode and at least one constant-current diode which are interposed in said circuit.

2. An LED lamp device according to claim 1, wherein said DC voltage input terminals are adapted to be connected to AC power source connection terminals or to DC power source connection terminals via a rectifying circuit.

3. An LED lamp device according to claim 1, wherein said DC voltage input terminals are DC power source connection terminals.

4. An LED lamp device according to any one of claims 1 through 3, further comprising an adapter for mounting on one end thereof said LED emitter, and a base fixed to the other end of said adapter, wherein lighting parts are contained inside said adapter and said base.

5. An LED lamp device according to claim 4 wherein said lighting parts include a constant voltage diode.