Method for measuring external light to control protection means against sunlight or illumination
US7193201B2 · kind B2 · utility
40Cited by
2References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 3, 2002 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Dec 4, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B80/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention concerns a method which consists in detecting and discriminating at least three states, respectively blue sky, white sky and direct sunlight. The discrimination between the three states is based, for example, on an intermediate detection distinguishing between either a homogenous state or a nonhomogeneous state of the sky. White sky means a sky saturated with humidity, with strong light diffusion and producing a high level of brightness. The method can be implemented, for example by using sensors or a monochromatic or color camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.