Lighting device
US8967848B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2009 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Mar 24, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a lightweight flexible lighting device with excellent durability and stable performance over repeated use that combines an organic electroluminescent element, an organic photoelectric conversion element, and a secondary cell. The lighting device has a control means for controlling the electrical connections of the organic electroluminescent element, the organic photoelectric conversion element, and the secondary cell. The control means controls the electrical connections such that a reverse bias voltage is applied to the organic electroluminescent element when the organic electroluminescent element receives light, generates power, and charges the secondary cell, and such that a reverse bias voltage is applied to the organic photoelectric conversion element when the organic electroluminescent element is supplied with power from the secondary cell and emits light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.