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:
Feb. 27, 2007
Filed:
Aug. 07, 2003
Naoki Itakura, Ashigarakami-gun, JP;
Naoki Itakura, Ashigarakami-gun, JP;
Abstract
In order to automatically distinguish a type of cable connected to a display apparatus, and transmit appropriate specification information to a host, when a hostand a display apparatusare connected via a DVI-D to DVI-D cablefor digital signal, a DDC 5V from the host is applied to an emitter of a detection transistor, and a lower voltage due to a resistoris applied to its base so that the detection transistor turns on. A collector voltage thus becomes an H level so that a multiplexeris switched to the side of a non-volatile memoryin which a digital EDID is stored. When they are connected via a D-Sub to DVI-I conversion cablefor analog signal, a DDC 5V terminal and an HPD terminal of the cable are short circuited, so the detection transistor turns off, the collector voltage becomes an L, and the multiplexer is switched to the non-volatile memory side in which an analog EDID is stored.