Broadcast receiving system

• US 20070064157A1
• Filed: 05/19/2004
• Published: 03/22/2007
• Est. Priority Date: 05/29/2003
• Status: Active Grant

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Kasamatsu, Hideki
• Granted Patent: US 7,643,092 B2
• Time in Patent Office: Days
• US Class Current: 348/730
• CPC Class Codes: H04N 21/2143 located in a single building, e.g. hotel, hospital or museum arrangements specially adapted for plural spots in a confined site in broadcast systems H04H20/63; adaptations for transmission by electric cable for domestic distribution in television systems H04N7/106
• CPC Class Codes: H04N 21/4122 additional display device, e.g. video projector digital output for controlling a plurality of local displays G06F3/1423
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/4263 involving specific tuning arrangements, e.g. two tuners
• CPC Class Codes: H04N 21/43637 involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11] arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114
• CPC Class Codes: H04N 21/4436 Power management, e.g. shutting down unused components of the receiver power management in computer systems G06F1/3203; hibernate or awake process in computer systems G06F9/4418
• CPC Class Codes: H04N 5/40 Modulation circuits
• CPC Class Codes: H04N 5/46 for receiving on more than one standard at will deflecting circuits of multi-standard receivers H04N3/27
• CPC Class Codes: H04N 5/50 Tuning indicators; Automatic tuning control
• CPC Class Codes: H04N 5/63 Generation or supply of power specially adapted for television receivers

Abstract

When a main television is turned on, a power source A, a power source B, and a power source C operate. When the main television is turned off (stand-by state), the power source A and the power source B operate, if the sub-television is turned on, and only the power source A operates, if the sub-TV is turned off. Therefore, even when the main television is turned off, as long as the sub-television is turned on, a broadcast reception process and a wireless video transmission to the sub-TV are performed. If both the main television and sub-television are turned off, then electric power supplies to circuits for the broadcast reception processes are stopped, and as a result, electric power consumption is saved.

Claims

1. A broadcast receiving system, formed of

a main television unit provided with a receiving part for receiving broadcast wave, a signal processing part for generating at least a video signal based on the received broadcast wave, a display for displaying a video based on the video signal, and a means for generating at least a transmission radio wave of a video based on the received broadcast wave;

and

a sub-television unit provided with a receiving part for receiving the transmission radio wave, a signal processing part for generating at least a video signal based on the received transmission radio wave, and a display for displaying a video based on the video signal, wherein

the sub-television unit is provided with a means for transmitting information indicating an TV on-state of the sub-television unit by wireless, on the other hand, the main television unit is provided with a means for receiving the information indicating the TV on-state of the sub-television unit by wireless, and the main television unit stops displaying the video on the display thereof when being turned off, while continuing a broadcast reception process, a transmission radio wave generation process, and a reception process of sub-television information by wireless when receiving the information indicating the TV on-state of the sub-television unit.

2. A broadcast receiving system according to claim 1, wherein the main television unit stops the broadcast reception process and the transmission radio wave generation process, while continuing the reception process of sub-television information by wireless, when the main television is turned off and the information indicating the TV on-state of the sub-television unit is not received.

3. A broadcast receiving system according to claim 1, wherein the main television unit includes a plurality of power sources, and the power source used for supplying electric power to a power consumption element related to each of the processes stops electric power supply to the power consumption element when the processes are stopped.

4. A broadcast receiving system according to claim 1, wherein the main television unit is provided with a plurality of tuners in the receiving part, and further provided with a selection means capable of inputting output signals from each of the tuners and outputting the signals from an arbitrary output terminal or inputting signals generated on the basis of the output signals and outputting the signals from an arbitrary output terminal, and signals selected for the sub-television unit by the selection means is output as the transmission radio wave.

5. A broadcast receiving system according to claim 2, wherein the main television unit includes a plurality of power sources, and the power source used for supplying electric power to a power consumption element related to each of the processes stops electric power supply to the power consumption element when the processes are stopped.

6. A broadcast receiving system according to claim 2, wherein the main television unit is provided with a plurality of tuners in the receiving part, and further provided with a selection means capable of inputting output signals from each of the tuners and outputting the signals from an arbitrary output terminal or inputting signals generated on the basis of the output signals and outputting the signals from an arbitrary output terminal, and signals selected for the sub-television unit by the selection means is output as the transmission radio wave.

7. A broadcast receiving system according to claim 3, wherein the main television unit is provided with a plurality of tuners in the receiving part, and further provided with a selection means capable of inputting output signals from each of the tuners and outputting the signals from an arbitrary output terminal or inputting signals generated on the basis of the output signals and outputting the signals from an arbitrary output terminal, and signals selected for the sub-television unit by the selection means is output as the transmission radio wave.