Koninklijke Philips Corporation N.v.

Shin-etsu Chemical Co., Ltd.

Philips Lumileds Lighting Company LLC

Philips Lumileds Lighting, LLC

Yasumasa Morita

Toshio Shiobara

Tsutomu Kashiwagi

Paul Scott Martin

Grigoriy Basin

Robert Scott West

Tewe Hiepke Heemstra

Kinya Kodama

Nicolaas Joseph Martin Van Leth

Cheun Jye Yow

Wai Choo Chai

Robert S West

Tewe H Heemstra

A silicone resin composition and process for coating a light transmitting surface of an optoelectronic device is disclosed. The process involves applying a silicone resin to the light transmitting surface, and causing the silicone resin to cure to form a light transmitting protective coating on the light transmitting surface, the silicone resin having a sufficiently low proportion of organosiloxanes having molecular weights of up to about 1000, such that the protective coating includes less than about 10% of the organosiloxanes having molecular weights of up to about 1000.

Silicone resin for protecting a light transmitting surface of an optoelectronic device

A technique for forming a white light LED is disclosed. In one embodiment, the LED emits blue light. A first phosphor for producing red, yellow, yellow-green, or green light is formed to conformably coat the LED die. One suitable deposition technique is electrophoretic deposition (EPD). Over the resulting LED structure is deposited another phosphor (to add the remaining color component) in a binder (e.g., silicone) for encapsulating the die. The blue LED light combines with the two phosphor colors to create white light. Since the two different deposition techniques are independent and easily controllable, the resulting white light temperature is highly controllable and the color emission is substantially uniform.

Blue LED with phosphor layer for producing white light and different phosphor in outer lens for reducing color temperature

Growing community of inventors

Sunnyvale, CA, United States of America

Yasumasa Morita