Solid state lamp

• US 4,211,955 A
• Filed: 03/02/1978
• Issued: 07/08/1980
• Est. Priority Date: 03/02/1978
• Status: Expired due to Term

• Current Assignee: Stephen W. Ray
• Original Assignee: Stephen W. Ray
• Inventors: Ray, Stephen W.
• Primary Examiner(s): La Roche, Eugene R.
• Application Number:
  US05/882,727
• Time in Patent Office: 859 Days
• Field of Search: 315/51, 315/52, 315/53, 315/135, 315/291, 315/307, 315/185 R, 315/189, 315/200 R, 315/205, 315/312, 315/324, 313/498, 313/499, 313/512, 313/500, 362/800, 362/84, 307/311, 357/17, 250/552, 250/553
• US Class Current: 315/53
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 23/02 the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
• 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: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/357 specially adapted for retrofit LED light sources
• CPC Class Codes: H05B 45/395 Linear regulators
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

An integrated circuit chip containing one or more light-emitting diodes is mounted within a light-diffusing encasement having a standard incandescent light bulb lamp base. The integrated circuit chip also contains a rectifier and voltage regulator circuit. The resulting solid state lamp may then be used to replace any standard incandescent light bulb, as it can be inserted in any existing standard A.C. or D.C. lamp sockets. The encasement may be a standard hollow light bulb, or, for maximum light diffusion, a solid transparent or translucent plastic in which the chip is embedded.

Claims

1. An area-illuminating solid state lamp comprising:

a light-diffusing encasement having a standard incandescent lamp base generally in the form of a cylinder;

a pair of electrical conductors whose lower ends are electrically secured to said base and whose upper ends extend into said encasement and mechanically support a discrete light-emitting solid state device;

said solid state device comprises an integrated circuit chip having a diode rectifier circuit, a plurality of series-interconnected light emitting diodes electrically coupled to said rectifier circuit by a voltage regulator circuit electrically connected between said rectifier and said plurality of light-emitting diodes;

said integrated circuit chip being electrically connected to and mechanically supported on said conductors within said encasement; and

said encasement being solid translucent plastic.

2. An area-illuminating solid state lamp as defined in claim 1 wherein said plurality of light-emitting diodes are arranged in a circular array on said chip.