Light emitting module and method for driving light emitting device
US11800615B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2020 |
| Grant date | Oct 24, 2023 |
| Priority date | — |
| Expiry date | Aug 11, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8513
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of driving a light-emitting device includes driving the light-emitting device having a light-emitting element and a light-emitting part that contains two or more types of phosphors adapted to be excited by light emitted from the light-emitting element, the two or more types of phosphors having respectively different afterglow characteristics. The driving of the light-emitting device includes supplying a current to the light-emitting element during a conducting period including a maximum current supply period in which a maximum current in the conducting period is supplied to the light-emitting element, and subsequent to the maximum current supply period, a current reduction period in which the current supplied to the light-emitting element is reduced continuously or stepwise from the maximum current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.