Display device

Details Display device Display device

2002-05-30

2008-10-21

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

C345S101000, C345S102000, C345S214000

Reexamination Certificate

active

07439968

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.

REFERENCES:
patent: 5813233 (1998-09-01), Okuda et al.
patent: 6825828 (2004-11-01), Burke et al.
patent: 2726467 (1978-12-01), None
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patent: 07-063405 (1995-03-01), None
patent: 08-178274 (1998-07-01), None
patent: 11-84534 (1999-03-01), None
patent: 2000-153121 (2000-06-01), None
patent: EP 0 094 360 (1983-05-01), None
Office Action from the Japanese Patent Office dated Jan. 11, 2006 in the corresponding Japanese patent application No. 2001-168663.
Office Action from Japanese Patent Office dated Apr. 5, 2006 in the corresponding Japanese patent application.

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