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:
Jul. 31, 1990
Filed:
Nov. 03, 1988
Takahiko Fukinuki, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A method for producing an NTSC compatible television signal for a widescreen television system having a widescreen panel includes deriving a luminance signal of a central portion of the widescreen panel, deriving a color signal modulated in response to the luminance signal according to the NTSC system, deriving a time-expanded signal from luminance signals of two sides of the widescreen panel modulating a sub-carrier so that a scanning line of identical phase drops down for each field, and deriving a time-expanded color signal from color signal of the two sides of the widescreen panel modulating the sub-carrier and having a phase which is the same in every scanning line in a field and which is inverse with response to the phase for the adjacent fields and having a horizontal frequency of the time-expanded luminance signal. The luminance signal, color signal, time-expanded luminance signal and time-expanded color signal are multiplexed so as to enable production of the NTSC compatible television signal.