Display device
US7439968B2 · kind B2 · utility
0Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 2002 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Nov 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133385
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a display device comprising a cooling suction fan and an air filter arranged on the suction side of the cooling suction fan, there are provided first means for measuring the value of a current flowing through a power supply line to the cooling suction fan for each predetermined time period, and second means for judging that the air filter is clogged when the measured current value is not more than a predetermined reference value, to inform the user that the air filter is clogged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.