Ultraviolet light emitting diode with AC voltage operation
US8698191B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2013 |
| Grant date | Apr 15, 2014 |
| Priority date | — |
| Expiry date | May 20, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/857
Abstract
Ultraviolet light emitting illuminator, and method for fabricating same, comprises an array of ultraviolet light emitting diodes and a first and second terminal. When an alternating current is applied across the first and second terminals and thus to each of the diodes, the illuminator emits ultraviolet light at a frequency corresponding to that of the alternating current. The illuminator includes a template with ultraviolet light emitting quantum wells, a first buffer layer with a first type of conductivity and a second buffer layer with a second type of conductivity, all deposited preferably over strain-relieving layer. A first and second metal contact are applied to the semiconductor layers having the first and second type of conductivity, respectively, to complete the LED. The emission spectrum ranges from 190 nm to 369 nm. The illuminator may be configured in various materials, geometries, sizes and designs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.