Light-emitting device test systems
US9874597B2 · kind B2 · utility
1Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2015 |
| Grant date | Jan 23, 2018 |
| Priority date | — |
| Expiry date | Jan 21, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/2601
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Light-emitting devices, such as LEDs, are tested using a photometric unit. The photometric unit, which may be an integrating sphere, can measure flux, color, or other properties of the devices. The photometric unit may have a single port or both an inlet and outlet. Light loss through the port, inlet, or outlet can be reduced or calibrated for. These testing systems can provide increased reliability, improved throughput, and/or improved measurement accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.