Solid state light emitting device
US8450748B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2010 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Dec 7, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting device comprises: an LED chip array comprising a plurality of LEDs formed on a single die (monolithic chip array) and at least one discrete LED that is separate from the LED chip array connected in series with the LED chip array. In an AC-drivable device the LED chip array is AC-drivable and two or more discrete LEDs are configured to be AC-drivable. The device can further comprise a package in which the LED chip array and discrete LED(s) are mounted. The discrete LEDs are configured such that positive and negative half wave periods of an AC drive voltage are mapped onto oppositely connected LED such that oppositely connected LED chips are alternately operable on a respective half wave period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.