JP2001211402A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a television receiver that can reduce power consumption. SOLUTION: The television receiver is provided with a switch that receives a digital reception circuit power supply even at power off of the receiver and turns on/off the supply of the digital reception circuit to a digital reception circuit, a means that discriminates whether or not a memory card is connected to a memory card connector at power off of the receiver, a means that turns on the switch when it is discriminated that the memory card is connected to the memory card connector, and a means that turns off the switch when it is discriminated that the memory card is not connected to the memory card connector.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver having a function of receiving digital broadcasting.

[0002]

2. Description of the Related Art In digital broadcasting such as CS digital broadcasting, entitlement data and message data are transmitted to a user. Here, the qualification data includes data indicating a channel (program) that can be viewed by the user and key information for descrambling, which are determined by the contract, and are transmitted together with the user ID. Since the qualification data is used for determining whether or not the program can be viewed by the user, descrambling, etc., even when the power of the receiver is turned off, the qualification data is received. It must be in a state that can be held.

[0003] The message data is a mail to the user, and is transmitted together with the user ID. Since the message data is an email to the user,
Even when the power of the receiver is turned off, it is necessary to keep the state in which the message data can be received and held.

[0004] For this reason, in a television receiver having a function of receiving digital broadcasting, power is supplied to a digital receiving circuit for receiving digital broadcasting even when the power of the receiver is turned off. It is necessary to supply power, and there is a problem that power consumption increases.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a television receiver capable of saving power consumption.

[0006]

A first television receiver according to the present invention comprises a digital receiving circuit for receiving digital broadcasting and a memory card for storing qualification data received by the digital receiving circuit. In a television receiver having a memory card connector to be mounted, a digital reception circuit is provided between a power supply for generating a power supply for a digital reception circuit and a digital reception circuit even when the power supply of the receiver is turned off. Switch for turning on and off the power supply of the digital receiving circuit to the circuit, means for determining whether or not the memory card is connected to the memory card connector when the receiver is turned off, A means for turning on the switch when it is determined that the Card when it is determined not to be connected to a memory card connector, characterized in that it comprises means for turning off the switch.

A second television receiver according to the present invention has a function of receiving a digital broadcast in addition to a terrestrial broadcast, a digital receiving circuit for receiving the digital broadcast, and a license received by the digital receiving circuit. In a television receiver having a memory card connector for mounting a memory card for storing added data, a power supply for generating a digital reception circuit power supply and a digital reception circuit even when the receiver is turned off. A switch for turning on / off the supply of power for the digital receiving circuit to the digital receiving circuit, and whether or not the memory card is connected to the memory card connector when the power of the receiver is turned off Means for determining, when it is determined that the memory card is connected to the memory card connector, Means for turning on the switch, and when the memory card is determined not to be connected to a memory card connector, characterized in that it comprises means for turning off the switch.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention applied to a television receiver having a built-in CS digital receiving circuit capable of receiving a CS broadcast in addition to a terrestrial broadcast. I do.

FIG. 1 shows a configuration of a television receiver having a built-in CS digital receiving circuit.

A terrestrial broadcast wave is sent to a terrestrial tuner 2 via a terrestrial antenna 1. The first AV signal (video signal + audio signal) obtained from the terrestrial tuner 2 is sent to the signal switch 5.

A CS broadcast wave using a communication satellite (CS) is sent to a CS digital receiving circuit 4 via a CS antenna 3.

The CS digital receiving circuit 4 includes a tuner section for performing high-frequency processing and demodulation processing, a descrambling circuit for descrambling an encrypted signal among digital signals obtained by the tuner section, and a descrambling circuit. DEMUX circuit that separates incoming data into MPEG audio data, MPEG video data, program guide information, qualification data, and message data, and demodulates MPEG audio data and MPEG video data to output audio and video signals MPEG decoder.

The CS digital receiving circuit 4 outputs the video signal and the audio signal obtained by the MPEG decoder as a second AV signal (video signal + audio signal). CS
The second AV signal obtained from the digital receiving circuit 4 is sent to the signal switch 5.

An IC card (memory card) is connected to the CS digital receiving circuit 4 and the system controller 20 via an IC card connector (memory card connector) 22.
21 are connected. The IC card 21 includes qualification data (including data indicating a channel (program) that can be viewed by the user and key information for descrambling by a descrambling circuit), user identification information,
A viewing history and the like are held.

The CS digital receiving circuit 4 transmits the qualification data extracted by the DEMUX circuit to the IC card 21.
To memorize. Further, the CS digital receiving circuit 4
When the message data is extracted by the EMUX circuit, the scramble applied to the message data is released using the key information in the IC card 21, and then stored in a memory (not shown).

The system controller 20 has a DEMUX
The program guide information extracted by the circuit is stored in a memory (not shown). The system controller 20 receives a remote control signal from a remote control transmitter 23
Is entered via

The system controller 20 sends information for channel selection and the like to the terrestrial tuner 2 and the CS digital receiving circuit 4 and sends a switching signal according to the receiving mode to the signal switch 5. The reception modes include a terrestrial broadcast program reception mode and a CS broadcast reception mode. In addition, the system controller 20 transmits an OSD control signal for causing the CRT 8 to display an on-screen program guide screen for CS broadcasting, various setting screens for CS broadcasting, and the like on the CRT 8.
It is sent to the display circuit 12. The OSD display circuit 12 sends the on-screen image information (OSD signal) to the video processing circuit 6.

The signal switch 5 is connected to the system controller 2
Based on the switching signal sent from 0, one of the first and second AV signals is selected, and a video signal and an audio signal included in the selected AV signal are output.

The video signal output from the signal switch 5 is
It is sent to the video processing circuit 6. The video processing circuit 6 combines the video signal output from the signal switch 5 and the OSD signal sent from the OSD display circuit 12. The video signal output from the video processing circuit 6 is transmitted through the video output circuit 7 to C
Sent to RT8. The audio signal output from the signal switch 5 is sent to the speaker 11 via the audio processing circuit 9 and the audio output circuit 10.

The AC power input to the plug 31 connected to the commercial power is sent to the power circuit 33 via the main switch 32. The power supply circuit 33 generates an operation power supply (DC power supply) for each circuit by a rectification / step-down operation.

From the power supply circuit 33 to the system controller 2
0 and a DC power supply (power supply for digital receiving circuit) for supplying the CS digital receiving circuit 4 from the power supply circuit 33 while the main switch 32 is on. It is always occurring.

When the user turns on the power key with the remote control transmitter 23, that is, when the power of the digital television broadcast receiver is turned on, the system controller 20 sends the first power control signal C1 to the power circuit 3
3 is controlled so that DC power to each circuit is output from the power supply circuit 33.

The power for the receiving circuit for the CS digital receiving circuit 4 is supplied from a power supply circuit 33 via a CS power switch 34. The CS power switch 34 is ON / OFF controlled by a first power control signal C1 and a second power control signal C2 from the system controller 20.

When the main switch 32 is turned on but the digital television broadcast receiver is not turned on, the CS power switch 34 is controlled as follows.

That is, in this case, the system controller 20 connects the IC card 21 to the IC card connector 22.
It is determined whether or not is mounted. As the determination method, there are a method of making a determination by attempting communication with the IC card from the system controller 20 and a method of making a determination based on a signal from the IC card connector 22 indicating that the IC card is attached or not.

The IC card 21 is connected to the IC card connector 22.
Is determined, the CS power switch 34 is turned on by the second power control signal C2. Therefore, in this case, power is supplied to the CS digital receiving circuit 4.

The IC card 21 is connected to the IC card
Is determined not to be attached, the system controller 20 outputs the CS signal in response to the second power control signal C2.
The power switch 34 is turned off. Therefore, in this case, no power is supplied to the CS digital receiving circuit 2.

When the main switch 32 is turned on and the power of the digital television broadcast receiver is turned on, the system controller 20 turns the CS power switch 34 on by the first power control signal C1. Let it. Therefore, in this case, power is supplied to the CS digital receiving circuit 4.

According to the above embodiment, when the digital television broadcast receiver is turned off and the IC card 21 is not mounted on the IC card connector 22, power is supplied to the CS digital receiving circuit 4. Power consumption can be reduced.

[0030]

According to the present invention, power consumption can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a television receiver.

[Explanation of symbols]

 2 Terrestrial tuner 4 CS digital receiving circuit 20 System controller 21 IC card 22 IC card connector

Claims (2)

[Claims] 1. A television receiver comprising: a digital receiving circuit for receiving a digital broadcast; and a memory card connector for mounting a memory card for storing qualification data received by the digital receiving circuit. The power supply for the digital receiving circuit is provided between the power supply that generates the power for the digital receiving circuit and the digital receiving circuit even when the power of the device is turned off, and the power supply for the digital receiving circuit to the digital receiving circuit is turned on and off. Means for determining whether the memory card is connected to the memory card connector when the receiver is powered off, and turning on the switch when it is determined that the memory card is connected to the memory card connector. Means to determine that the memory card is not connected to the memory card connector. Means for turning off the switch in the case of a television receiver. 2. A digital receiving circuit for receiving digital broadcasting in addition to terrestrial broadcasting, a digital receiving circuit for receiving digital broadcasting, and a memory card for storing qualification data received by the digital receiving circuit. In a television receiver having a memory card connector to be mounted, a digital reception circuit is provided between a power supply for generating a power supply for a digital reception circuit and a digital reception circuit even when the power supply of the receiver is turned off. A switch for turning on / off the supply of power for the digital receiving circuit to the circuit; a unit for determining whether a memory card is connected to a memory card connector when the receiver is turned off; Means for turning on a switch when it is determined that it is connected to a connector, and a memory Means for turning off the switch when it is determined that the card is not connected to the memory card connector.