The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 1999
Filed:
Oct. 18, 1995
Hirohito Kuriyama, Kawasaki, JP;
Keiichi Kaneko, Kawasaki, JP;
Rikurou Tanahashi, Kawasaki, JP;
Akira Yamamoto, Kawasaki, JP;
Shigeki Kameyama, Kawasaki, JP;
Masaya Tajima, Kawasaki, JP;
Shigetoshi Tomio, Kawasaki, JP;
Tomokatsu Kishi, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
In a plasma display panel, an analogue brightness value given by a variable resistor is periodically converted into a digital brightness value and stored in a memory. A digital brightness value of a current period is compared with the digital brightness value of the next preceding period stored in the memory, to produce a difference brightness value which is compared with a predetermined brightness value and, if larger than the predetermined value, the brightness value stored in the memory is updated. Alternatively, power consumption of a display device is detected and, when the power consumption is larger than a set point, a brightness value is gradually decreased and, when the power consumption is smaller than the set point, the brightness value is gradually adjusted to a brightness set value.