JPH10234011A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent consumption of useless power by supplying power only to a circuit required for a broadcast output. SOLUTION: When the operator sets it that the operator does not always use a communication satellite(CS) broadcast, a system controlling microcomputer 66 turns off a switch SW1. Power supply to a CS digital circuit 18 is stopped thereby. Furthermore, when the operator uses the CS broadcast and the selected CS broadcast channel is a radio broadcast channel, a switch SW4 is turned off and power supply to a video output circuit 44 is stopped. Moreover, when the selected CS broadcast channel is a data broadcast channel, switches SW3, SW4 are turned off and power supply to an audio output circuit 46 and the video output circuit 44 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, and more particularly, to a digital broadcast including a channel for displaying an image on a display such as a normal broadcast and a channel for not displaying an image on a display such as a data broadcast. The present invention relates to a television receiver that receives terrestrial broadcasting.

[0002]

2. Description of the Related Art Digital broadcasting includes a normal broadcasting channel for broadcasting both video and audio, a radio broadcasting channel for broadcasting only audio, and a data broadcasting channel for broadcasting data such as computer programs. Therefore, when the television receiver receiving the digital broadcast selects the normal broadcast channel, the video and audio are output from the display and the speaker, respectively. When the radio broadcast channel is selected, the audio is output from the speaker, and the data broadcast is received. Then, data was output from the communication port (interface) to, for example, a personal computer.

[0003]

In such a television receiver, if a display is powered on while receiving a radio broadcast or a data broadcast, useless power is consumed. Therefore, a main object of the present invention is to provide a television receiver capable of preventing power consumption.

[0004]

According to a first aspect of the present invention, there is provided a television receiver for receiving a digital broadcast including a first channel for displaying an image on a display and a second channel for not displaying an image on a display. A television receiver comprising first power-off means for turning off the power of a display when a channel is selected.

[0005] A second invention is a mode setting for setting an analog reception mode for receiving only analog broadcasts in a television receiver having first receiving means for receiving digital broadcasts and second receiving means for receiving analog broadcasts. And a power-off means for turning off the power of the first reception means when the analog reception mode is set.

[0006]

According to the first aspect, when receiving a normal broadcast,
The power of the display and the speaker is turned on, and video and audio are output from the display and the speaker, respectively. On the other hand, the power of the display is turned off when receiving a radio broadcast, and both the display and the speaker are turned off when receiving a data broadcast.

In the second invention, a receiver for analog broadcasting is provided in addition to a receiver for digital broadcasting. If an analog receiving mode for receiving only analog broadcasting is set, the receiver for digital broadcasting is provided. The power is turned off.

[0008]

According to the first aspect of the present invention, when the second channel for which no image is displayed on the display is selected, the power of the display is turned off, so that wasteful power consumption can be prevented. According to the second aspect, when the analog reception mode is set, the power of the first receiving unit that receives the digital broadcast is turned off, so that wasteful power consumption can be prevented.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a television receiver 10 according to this embodiment has an antenna 1 for receiving terrestrial broadcasting.
2 and an antenna 14 for receiving a CS (Communication Satellite) broadcast. The terrestrial broadcast signal received by the antenna 12 is supplied to a terrestrial tuner 20 included in the terrestrial wave receiving circuit 16, whereby a broadcast signal of a desired channel is selected, and an IF signal of the channel is converted to an I / O signal.
The signal is demodulated by the F demodulation circuit 22. On the other hand, the CS broadcast signal received by the antenna 14 is supplied to a CS tuner 26 shown in FIG. It is processed. M
The PEG decoder 34 generates audio data and video data based on the output from the demultiplexer 32. Audio data is audio D / A converter 3
The video data is converted into an analog audio signal in step 6 and the video data is converted into an NTSC format video signal (luminance signal and color difference signal) by the NTSC encoder 38.

In the CS broadcast, a radio broadcast channel for broadcasting only audio and a data broadcasting channel for broadcasting data such as a computer program are provided in addition to a normal broadcasting channel for broadcasting both video and audio simultaneously. When the CS tuner 26 selects a data broadcast channel, data included in that channel is output from the descrambler 30 to the personal computer 42 via the interface 40. When the CS tuner receives a radio broadcast channel, the
The decoder 34 outputs only audio data.

The video signal processing circuit 24 included in the video output circuit 44 receives the color video signal demodulated by the IF demodulation circuit 22, and generates a luminance signal and a color difference signal. The switch 48 selects one of the luminance signal and the color difference signal from the video signal processing circuit 24 and the luminance signal and the color difference signal from the CS digital circuit 18 and supplies the selected signal to the color signal reproducing circuit 50. The RGB signals reproduced by the color signal reproduction circuit 50 are output from a CRT 52 to which a high voltage is applied by a high voltage circuit 56.
Is deflected by the deflection circuit 54, whereby a desired image is displayed.

On the other hand, the audio signal demodulated by the IF demodulation circuit 22 is processed by an audio signal processing circuit 58 and then supplied to a switch 60. The switch 60 selects one of the audio signal from the audio signal processing circuit 58 and the audio signal from the CS digital circuit 18 and supplies the selected signal to the speaker 62.
Therefore, the sound of the terrestrial broadcast or the CS broadcast is output from the speaker 62.

When the outlet 80 is connected to a power supply and the main switch 78 is turned on, power is supplied to the microcomputer 64 via the power supply circuit 76. At this time, FIG.
Remote control transmitter 74 in which various keys are arranged as shown in FIG.
Is operated, the remote control light receiver 72 receives an infrared signal from the remote control transmitter 74 and provides key input data to the system control microcomputer (syscon microcomputer) 66 and the channel selection microcomputer 68 included in the microcomputer circuit 64. The system microcomputer 66 turns on / off the switches SW1 to SW4 according to a key input signal or broadcast mode information transmitted from the channel selection microcomputer 68 via the bus 70. The channel selection microcomputer 68 selects a desired channel in accordance with the key input signal and the flag information from the system microcomputer 66.

More specifically, the system microcomputer 66 is configured as shown in FIG.
And the channel selection microcomputer processes the flow charts shown in FIGS. First, referring to FIG. 4, in step S1, the system microcomputer 66 determines whether or not the power key 74a shown in FIG. 3 has been operated, and if "YES", whether or not the interlocking flag 66a has been set in step S5. If it is set, the switches SW1 to SW4 are turned on in step S7, and the terrestrial wave receiving circuit 1 is turned on.
6. The CS digital circuit 18, the video output circuit 44 and the audio output circuit 46 are all activated. On the other hand, if the CS flag 66a has been reset, only the switches SW2 to SW4 are turned on in step S9, and the CS digital circuit 1
The supply of power to 8 is stopped. That is, the link flag 6
If the power key 6a is set, the power supply to the CS digital circuit 18 is turned on / off in conjunction with the operation of the power key 74a.
Turned off. It should be noted that the link flag 66a indicates that the user
When the S broadcast is not used, it is reset by the user's remote control operation. Step S7 or S9
Is completed, in step S11, the channel selection microcomputer 68
And outputs flag information indicating whether or not the interlocking flag 66a is set.

Referring to FIG. 5, the channel selection microcomputer 68 determines whether or not flag information has been input from the system microcomputer 66 in step S31. If "YES" here,
In step S33, the immediately preceding channel, that is, the CS broadcast channel or the terrestrial broadcast channel that was selected when the power was last turned off, is selected, and then in step S35, it is determined whether or not the interlocking flag 66a is set.
If "NO" here, the user determines that the CS broadcast is not used and proceeds to step S37. In this step, it is determined whether or not a key operation has been performed. If “YES”, it is determined in step S39 whether or not the operation is a menu key 74c. If "YES" here, menu processing is performed in step S41 and the process returns to step S37. If "NO", it is determined whether the key operated in step S43 is the numeric key 74f. If "YES", a desired terrestrial broadcast channel receiving process is performed according to the numeric key in step S45, and the process returns to step S37. If "NO", step S37 is performed.
Is determined to be irrelevant to the selection of the terrestrial broadcast channel, and the process returns to step S37 without performing any processing.

On the other hand, if "YES" is determined in the step S35, the process proceeds to the steps S47 to S55.
The same processing as in steps S37 to S45 is performed, and in step S5
If "NO" is determined in step 3, steps S57 to S6
The process returns to step S47 through the process of step S5. That is, if “NO” in the step S53, the CS key 74b and the numeric key 7 are used in the steps S57 and S59, respectively.
It is determined whether or not 4f has been operated, and if one of them is "NO", the process returns to step S47, but if both are "YES", a desired CS broadcast channel is selected according to the operation in step S61. In step S63, the broadcast mode of the selected channel is determined,
That is, it is determined whether the selected channel is a normal broadcast channel, a radio broadcast channel, or a data broadcast channel. In step S65, the determination result (broadcast mode information) is output to the system microcomputer 66, and the process returns to step S47. .

In steps S41 and S51, the channel selection microcomputer 68 processes a subroutine shown in FIG. That is, first, in step S70, a menu screen is displayed on the display 82 as shown in FIG. 8, and it is determined in step S72 whether a key operation has been performed. If "YES" here, it is determined whether or not the operated key is the cursor key 74d in a step S74, and if "YES", it is displayed on the display 82 according to the operation of the cursor key 74d in a step S76. The cursor is moved up / down, and the process returns to step S72. On the other hand, step S
If "NO" in step 74, it is determined in step S78 whether or not the operated key is the enter key 74e.
If "O", the key operation is invalidated and step S72 is performed.
If "YES", it is determined in step S80 whether or not the cursor is pointing to (1) of the menu displayed on the display 82. If “YES”, the user determines that the CS broadcast is used, and the process proceeds to step S8.
In step S80, if the link flag 66a is set and the process returns, if "NO" in step S80, it is determined that the user does not use the CS broadcast and the link flag 66a is set in step S84.
Reset 6a and return.

Returning to FIG. 4, the system microcomputer 66 is
In step S13, it is determined whether broadcast mode information has been input from the channel selection microcomputer 68. If "NO" here, it is determined whether or not the power key 74a has been operated in a step S15. If "NO", the process returns to the step S13. If "YES", the process proceeds to a step S27. , CS digital circuit 18, video output circuit 44
Then, the supply of power to the audio output circuit 46 is stopped, and the process ends. On the other hand, if it is determined in step S13 that the broadcast mode information has been input, it is determined in step S17 whether the CS broadcast channel selected by the channel selection microcomputer 68 is a normal broadcast channel. And “YES”
If so, in step S19, the switches SW3 and SW
By turning on 4, the video output circuit 44 and the audio output circuit 46 are activated, and the process returns to step S13. On the other hand, if “NO” in the step S17, in a step S21,
It is determined whether or not the selected CS broadcast channel is a radio broadcast channel. If "YES" here, since only audio is broadcast, the switch SW4 is turned off and the process returns to step S13. “NO” in step S21
If so, assume that the received broadcast is a data broadcast,
In step S25, both switches SW3 and SW4 are turned off, and the process returns to step S13.

As described above, the system microcomputer 66 is connected to the CS
If the flag 66a has been reset, the supply of power to the CS digital circuit 18 not used by the user is stopped. Also, even when the CS flag 66a is set, if the selected CS broadcast channel is a radio broadcast channel, the supply of power to the video output circuit 44 is stopped, and the selected CS broadcast channel is If it is a broadcast channel, the video output circuit 44 and the audio output circuit 46
Supply of power to both of them is stopped. Therefore, power is supplied only to necessary circuits, and wasteful power consumption can be prevented.

By the way, turning off the power supply of the CS digital circuit 18 can save about 20 W of power,
By turning off the power of the video output circuit 44 (CRT 52), about 100 W of power can be saved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram showing a CS digital circuit 18.

FIG. 3 is an illustrative view showing a remote control transmitter;

FIG. 4 is a flowchart showing processing of a system microcomputer.

FIG. 5 is a flowchart showing a part of the operation of the channel selection microcomputer;

FIG. 6 is a flowchart showing another part of the operation of the channel selection microcomputer;

FIG. 7 is a flowchart showing another portion of the operation of the channel selection microcomputer;

FIG. 8 is an illustrative view showing a menu displayed on a display;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Television receiver 16 ... Terrestrial wave receiving circuit 18 ... CS digital circuit 44 ... Video output circuit 46 ... Audio output circuit 64 ... Microcomputer circuit

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[Procedure amendment]

[Submission date] February 20, 1997

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Yoshinori Hama 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Masako Otsuki 2-chome, Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd.

Claims (5)

[Claims] 1. A television receiver for receiving a digital broadcast including a first channel for displaying an image on a display and a second channel for not displaying an image on the display, wherein the display is set when the second channel is selected. A first power-off means for turning off the power of the television receiver. 2. The second channel includes a third channel that does not output audio from an audio output circuit, and the second channel turns off the audio output circuit when the third channel is selected.
The television receiver according to claim 1, further comprising power-off means. 3. The television receiver according to claim 2, wherein said third channel is a data broadcast channel. 4. A first receiving means for receiving the digital broadcast, a second receiving means for receiving an analog broadcast, a mode setting means for setting an analog reception mode for receiving only the analog broadcast, and wherein the analog reception mode is set. The television receiver according to any one of claims 1 to 3, further comprising a third power-off means for turning off the power of the first receiving means when the power is off. 5. A television receiver comprising: first receiving means for receiving a digital broadcast; and second receiving means for receiving an analog broadcast, a mode setting means for setting an analog receiving mode for receiving only the analog broadcast, and A television receiver, comprising: power-off means for turning off the power of the first reception means when the analog reception mode is set.