Light emitting diode device

Patent 6972439 Issued on December 6, 2005. Estimated Expiration Date:

August 12, 2024. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Optical radiation source or detector device having plural radiating or receiving characteristics
Patent #: 4638343
Issued on: 01/20/1987
Inventor: Althaus , et al.

Light-emitting diode (LED) package and packaging method for shaping the external light intensity distribution
Patent #: 6674096
Issued on: 01/06/2004
Inventor: Sommers

Side emitting LED and lens Patent #: 6679621
Issued on: 01/20/2004
Inventor: West , et al.

Inventors

Application

No. 10916525 filed on 08/12/2004

US Classes:

257/98, With reflector, opaque mask, or optical element (e.g., lens, optical fiber, index of refraction matching layer, luminescent material layer, filter) integral with device or device enclosure or package257/100Encapsulated

Examiners

Primary: Crane, Sara W.

Attorney, Agent or Firm

Lowe Hauptman & Berner, LLP

Foreign Patent References

9-330604 JP 12/01/1997

International Class

H01L029/22

Abstract

Disclosed herein is a light emitting diode (LED) device. The light emitting diode device comprises a package formed with a terminal for applying an electrical signal, one or more LED chips mounted on the package such that the LED chips are electrically connected to the terminal, a lens formed to surround the LED chips on the package for changing path of light emitted from the LED chips to the horizontal direction with the difference of the refraction rates of the media, and a reflector formed on the lens for reflecting the light, emitted above the lens without being refracted in the horizontal direction at the lens, to the horizontal direction. The LED device reflects the light, which is deviated from the optical design range of the lens and emitted above the lens, back to the lens, thereby preventing the hot spot from being generated, and enhancing horizontal emission efficiency of the light.