US 2014/0232939 A1Published application

Transmission system and relay device

AssigneeHitachi Consumer Electronics Co., Ltd.

InventorNobuaki Kabuto

Life of this patent

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Abstract

Provided is a system for supplying a power from a sink device to a source device. Not only the source device but also a cable or a repeater device to be connected thereto has compatibility in power supply. A physical address obtained from information of an EDID memory forms a base of CEC message exchange, but a physical address of the cable or repeater device is overlapped with the source device or unknown. The cable or a repeater device uses changes the type of a message while using the same physical address as the source device or use such a message having the physical address information of the source device is described in a parameter of the message using the unknown physical address. The message having a supply or reception current for each device described therein is exchanged with the sink device or the source device to adjust current reception.

Claims2

Dependent claims

A relay device adapted to be positioned in a transmission system for transmitting a video signal from a source device to a sink device, the relay device comprising:

a video signal receiving unit configured to receive a video signal from the source device;
a video signal transmitting unit configured to transmit the video signal to the sink device;
a first communication unit configured to receive information regarding a power supply capability of the sink device;
a second communication unit configured to transmit information regarding a power supply capability of the relay device to the source device;
a first power circuit configured to receive power supplied by the sink device;
and
a second power circuit configured to supply power to the source device;
wherein an amount of sum of the power supply capability of the relay device and power consumed at the relay device does not exceed an amount of power supply capability of the sink device, and
wherein an amount of power to be supplied from the second power circuit to the source device is arranged to be difference between an amount having been supplied from the sink device to the first power circuit and another amount consumed at the relay device.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/264,295Filed 29 Apr 2014
Priority: JP 2011-0509719 Mar 2011
Published: 21 Aug 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04N 5/63
Details of television systems: generation or supply of power specially adapted for television receivers
G09G 5/006
Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto: details of…
H04N 5/38
Details of television systems: transmitter circuitry for the transmission of television signals according to analogue transmission standards
H04N 21/43635
Involving a wired protocol, e.g. IEEE 1394: hdmi

Family

Application13/316,757Continuation · filed 12 Dec 2011
Application14/264,295Continuation
US 2012/0229706 A1Published application
US 8,732,785 B2Related patent
US 9,270,922 B2Related patent
US 2014/0232939 A1This patent

From the US filing history. Foreign family members aren’t listed.