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:
Mar. 23, 1999
Filed:
Oct. 06, 1997
Applicant:
Inventors:
Toshimitsu Watanabe, Yokohama, JP;
Masahisa Tsukahara, Fujisawa, JP;
Makoto Kitamura, Yokohama, JP;
Takeshi Mochizuki, Yokohama, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Video and Information Systems, Inc., Yokohama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; H01J / ;
U.S. Cl.
CPC ...
3153821 ; 315382 ; 348806 ;
Abstract
A display device for suppressing focus dislocation due to high voltage fluctuation and realizing a dynamic focus circuit with large output at low power consumption and low cost, in which a circuit for detecting high voltage fluctuation is provided, and the dynamic focus waveform is clamped, and the waveform of horizontal cycle is clipped during the retrace time, and a boot strap circuit including an emitter follower, DC feedback circuit, and capacitor is provided as an output circuit.