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:
Jun. 04, 2013
Filed:
Nov. 07, 2007
Yasuhisa Nakajima, Kanagawa, JP;
Hidekazu Kikuchi, Kanagawa, JP;
Takehiko Saitou, Tokyo, JP;
Shigehiro Kawai, Tokyo, JP;
Masaki Kitano, Tokyo, JP;
Yasuhisa Nakajima, Kanagawa, JP;
Hidekazu Kikuchi, Kanagawa, JP;
Takehiko Saitou, Tokyo, JP;
Shigehiro Kawai, Tokyo, JP;
Masaki Kitano, Tokyo, JP;
Sony Corporation, , JP;
Abstract
To discriminate whether a cable in conformity with a conventional standard or a cable in conformity with a new standard is connected. An HPD signal line () has, on an expanded HDMI sink apparatus () side circuit, a pull-up resistor () between the HPD signal line () and a voltage supply and a pull-down resistor () between the HPD signal line () and the ground, and a reserved line () has, on the expanded HDMI sink apparatus () side circuit, a pull-down resistor () between the reserved line () and a ground, and within a new HDMI cable (), a pull-up resistor () between the reserved line () and a voltage supply of an expanded HDMI source apparatus (). The expanded HDMI sink apparatus compares a voltage at a test point () on the reserved line () on the expanded HDMI sink apparatus () side with a reference voltage by using a voltage comparator (). A CPU of the expanded HDMI sink apparatus () determines, when an output from the voltage comparator () is High, a normal state where the new HDMI cable () is inserted, and when an output from the voltage comparator () is Low, determines a state where a conventional HDMI cable () is erroneously inserted.