Common optical element for an array of phosphor converted light emitting devices

US8067254B2 · kind B2 · utility

Assignee

• Philips Lumileds Lighting Company LLC · US

Inventors

• Michael D. Camras · San Jose, US
• William R. Imler · Oakland, US
• Franklin J. Wall, Jr. · Vacaville, US
• Frank M. Steranka · San Jose, US
• Michael R. Krames · Los Altos, US
• Helena Ticha · Srch, CZ
• Ladislav Tichy · Srch, CZ
• Robertus G. Alferink · Son en Breugel, NL

Key dates

• Filing date: Jan 12, 2010
• Grant date: Nov 29, 2011
• Expiry date: Jan 12, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05B45/20
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A device is provided with an array of a plurality of phosphor converted light emitting devices (LEDs) that produce broad spectrum light. The phosphor converted LEDs may produce light with different correlated color temperature (CCT) and are covered with an optical element that assists in mixing the light from the LEDs to produce a desired correlated color temperature. The optical element may be bonded to the phosphor converted light emitting devices. The optical element may be a dome mounted over the phosphor converted light emitting devices and filled with an encapsulant.