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. 28, 2004
Filed:
Feb. 19, 2003
Yukimi Saiki, Tokyo, JP;
Masahisa Tsukahara, Fujisawa, JP;
Toshimitsu Watanabe, Yokohama, JP;
Kazuhiko Yoshizawa, Yokohama, JP;
Other;
Abstract
A high definition display unit which demodulates, decodes, and processes in relation to chroma and displays a television signal in which a PI (picture) signal and an SI (service information) signal are mixed. A changeover switch connected to an image quality adjusting circuit in a video chroma processing circuit is opened or closed according to an on-off signal S showing the superposed period of both signals detected by a decoder . If the above on-off signal S is on, the changeover switch is opened and the adjustment of image quality is disabled. Therefore, SI display never disappears due to the adjustment of image quality, and the quality of an image can be also adjusted according to an ambient status. Other approaches are also disclosed from preventing image quality adjustment of at least portions of a displayed image containing an information image.