Television – Cathode-ray tube burn-in prevention
Reexamination Certificate
2005-05-10
2005-05-10
Kostak, Victor R. (Department: 2614)
Television
Cathode-ray tube burn-in prevention
C348S380000, C348S569000, C345S215000
Reexamination Certificate
active
06891564
ABSTRACT:
An apparatus for controlling aging, cathode ray tube aging including a microcontroller generating brightness level data for aging of the cathode to a video input signal; a video preamplifier connected to the microcontroller receiving the brightness level data by the video input signal and mixing a host video signal to generate a video output signal wherein the brightness level of the video output signal being controlled by the microcontroller; a cutoff control coupled to the video preamplifier receiving brightness data of the video output signal and setting a proper brightness level of a cathode; and a voltage control not coupled to the microcontroller preset for a an initial brightness level of the cathode during aging.
REFERENCES:
patent: 4435729 (1984-03-01), Harwood et al.
patent: 5677730 (1997-10-01), Park
patent: 5920339 (1999-07-01), Lee
patent: 6242863 (2001-06-01), Amaya et al.
PCT International Search Authority; “Notification of Transmittal of the International Search Report or the Declaration” and “PCT International Search Report”; dated May 1, 2003; 5 pages.
Fujimori Shin
Hamada Toshinori
Nakazono Hiyouki
Fitch Even Tabin & Flannery
Kostak Victor R.
Lebens Thomas P.
Sony Electronics Inc.
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