Optical radiation source or detector device having plural radiating or receiving characteristics
Light-emitting diode (LED) package and packaging method for shaping the external light intensity distribution
Side emitting LED and lens Patent #: 6679621
ApplicationNo. 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
ExaminersPrimary: Crane, Sara W.
Attorney, Agent or Firm
Foreign Patent References
AbstractDisclosed 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.
Field of SearchWith 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 package
With housing or contact structure
With specific housing or contact structure