Auto light intensity adjustment system
US8196331B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2009 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Aug 26, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41G1/345
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An auto light intensity adjustment system is provided. The auto light intensity adjustment system includes a light sensing unit, a charge/discharge circuit, a comparator unit and a light source module. The light sensing unit outputs a sensing signal according to an ambient light intensity detected thereby. The charge/discharge circuit is coupled to the light sensing unit for receiving the sensing signal, and generating a voltage signal with regular variation periods according to the sensing signal. The comparator unit compares the voltage signal to a threshold value signal, and outputs a result signal accordingly. The light source module modifies a light intensity according to the result signal. The invention automatically controls the light intensity according to the ambient light intensity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.