Illuminator for plant growth
US8074397B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2001 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Jul 14, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S47/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
To provide an illuminator for plant growth that can illuminate a plant intermittently (pulse illumination) or continuously to cause an effect similar to sunbeam spot phenomenon, thereby accelerating photosynthetic reaction.Specifically, the illuminator for plant growth includes a light source composed of a semiconductor optical device, a control unit for outputting a turn-on timing signal for the light source, a rhythm signal detecting unit for A/D converting an input rhythm signal, a timing signal modulating unit for modulating the turn-on timing signal with the output signal from the rhythm signal detecting unit, and a pulse drive unit for pulse-modulating a power signal with the modulated turn-on timing signal outputted from the timing signal modulating unit and supplying the pulse-modulated power signal to the light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.