LED lamp
US6841931B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 11, 2002 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Apr 11, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/48465
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
In an LED lamp, a Zener diode is mounted on a copper plate, and a GaN-based light-emitting element is mounted on the Zener diode with an electrode of the element being oriented facedown. Two Zener diodes close to the center of the LED lamp are mounted on a common copper plate, thereby interconnecting the two light-emitting elements in series. Consequently, a Zener diode is connected to the respective two Zener diodes by means of a wire serving as a conductive member. Four light-emitting elements are connected in series, so that four light-emitting elements are connected in series, thus completing a circuit configuration. In this way, use of the Zener diodes for interconnection purpose enables a reduction in the number of minimum required wires. It is better to connect the wire to the upper surfaces of the Zener diodes, thereby obviating a necessity for a redundant wire space and enabling miniaturization of the LED lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.