News Column

Patent Issued for Surface-Textured Encapsulations for Use with Light Emitting Diodes

August 6, 2014

By a News Reporter-Staff News Editor at Electronics Newsweekly -- A patent by the inventor Xu, Tao (Livermore, CA), filed on December 23, 2010, was published online on July 22, 2014, according to news reporting originating from Alexandria, Virginia, by VerticalNews correspondents.

Patent number 8783915 is assigned to Bridgelux, Inc. (Livermore, CA).

The following quote was obtained by the news editors from the background information supplied by the inventors: "The present application relates generally to light emitting diodes, and more particularly, to surface-textured encapsulations for use with light emitting diodes to provide for enhanced light output.

"Light emitting diodes (LEDs) for use as indicators are well known. LEDs have been used extensively for this purpose in consumer electronics. For example, red LEDs are commonly used to indicate that power has been applied to devices such as radios, televisions, video recorder (VCRs) and the like.

"Recently, high-power LEDs have seen increased use in general lighting applications. For example, power LEDs can now be found in overhead lighting, table lamps, and in automotive application, such as in automobile headlamps. Typically, high-power LEDs are provided as part of an assembly comprising a LED mounted to a substrate and protected by encapsulation. Light emitted from the LED passes through the encapsulation before it is visible to a user. However, there is light loss in the encapsulation layer in the LEDs. This is due in part to internal reflections occurring at the interface between the encapsulation and the air.

"Various techniques have been tried to improve the light output of the LEDs. For example, the addition of a lens to the encapsulation layer has been used to extract additional light. However, the additional lens material impacts the thermal properties of the LED assembly by reducing heat dissipation. Also, the addition of the lens increases the cost of processing and manufacture of the LED assembly.

"Therefore, what is needed is a way to increase the optical output of high power LEDs while providing excellent heat dissipation and reduced processing and manufacturing costs."

In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventor's summary information for this patent: "In one or more aspects, a surface-textured encapsulation layer is provided for use with one or more light emitting diodes so as to provide increased optical output, excellent heat dissipation, and reduced processing costs.

"Aspects of the embodiments will become apparent after review of the hereinafter set forth Brief Description of the Drawings, Description, and the Claims."

URL and more information on this patent, see: Xu, Tao. Surface-Textured Encapsulations for Use with Light Emitting Diodes. U.S. Patent Number 8783915, filed December 23, 2010, and published online on July 22, 2014. Patent URL:

Keywords for this news article include: Electronics, Bridgelux Inc., Light-emitting Diode.

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Source: Electronics Newsweekly

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