JPH09139924A - Video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption by selecting automatically an output of a video signal received from a TV broadcast respectively section in the case of a monaural signal or an output of a video signal received from a teletext broadcast reception section onto a display section in the case of stereo signal so as to attain easy to see teletext display. SOLUTION: A display changeover section 3 conducts switching based on the result of detection by a stereo/monochromatic detection section 5. That is, in the case of a monaural signal, a video signal received from a TV broadcast reception section 2 is outputted and in the case of a stereo signal, a video signal received from a teletext reception section 1 is outputted to a display section 4 through the switching. This is because a broadcast program is transmitted by monaural signals and a commercial broadcast program is transmitted by stereo signals mostly in the existing TV broadcast system. Through the operation, in the case of reception of a program, a teletext broadcast indication is automatically selected for the user for viewing the teletext program. Furthermore, in the case of reproduction of a music CD, the display section 4 requiring a high power consumption is not used. Thus, the power consumption is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video display device capable of controlling display switching of a plurality of video displays such as television, teletext, and CDROM reproduction.

[0002]

2. Description of the Related Art Conventionally, as a video display device capable of controlling display switching of a plurality of video displays, Japanese Patent Laid-Open No. 58-147 has been disclosed.
The "image information terminal device" of the 286 publication is mentioned. According to the present invention, teletext is always displayed, and when a captain signal is input from the telephone line, the display is switched to the captain display.

[0003]

When the conventional technology is used to control the display switching of the teletext, the television, and the CDROM, there are the following problems.

1 In case of switching from TV to teletext: Since the teletext input signal is always received, it cannot be used as a switching signal from the TV to teletext.

If the switching is done manually, a switching operation is required.・ Because the display resolution of TV broadcast and teletext is the same,
When the teletext is displayed on multiple screens, the letters are difficult to see.

2 When the music CD is reproduced from the TV and the characters are displayed.-Although the image display is not required during the reproduction of the music CD, the power of the display system is in the ON state and the power consumption is wasted.

When powering off the display unit manually, it is necessary to separately provide a switch for the main body power supply and a switch for the display system power supply, and a switch on / off operation is required.

The present invention is to solve the above-mentioned problems. It is possible to automatically and effectively switch the display from the TV to the teletext. The display resolution is automatically changed between the teletext display and the TV display. It is easy to see the text display of teletext broadcasting ・ It is possible to provide a video display device that can automatically turn off the power supply of the display system when playing a music CD to reduce power consumption.

[0009]

In order to solve the above-mentioned problems, a video display device of the present invention is a video display device for performing a character broadcast and a television display, and displays a character broadcast by using a stereo monaural signal when receiving the television. It is characterized by switching between and TV display.

Further, the video display device of the present invention is characterized in that the display resolution is automatically changed in accordance with the switching between the television and the teletext.

Further, the video display device of the present invention is characterized in that, when performing reproduction of a music CD and a CDROM accompanied by video display, the power supply of the display system is automatically turned off when the CD to be reproduced is a music CD. It is a thing.

According to the present invention, it is possible to automatically and effectively switch the display from the TV to the teletext.
Display resolution is automatically changed between teletext display and TV display,
It is possible to provide a video display device in which the character display of a teletext is easy to see, and the power of the display system is automatically turned off at the time of playing a music CD, and the power consumption can be suppressed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A video display device according to claim 1 of the present invention is a video display device for performing teletext and television display, which uses a voice multiplex signal during television reception to perform teletext display and television display. It is characterized by switching, and since there are usually many monaural programs and stereo commercial programs, it has the effect of being able to automatically switch to a teletext program when a commercial program is received.

The video display device according to a second aspect of the present invention is a teletext receiving means for receiving a teletext and outputting a text display signal, and a television for receiving a television broadcast and outputting a television display signal. Broadcast receiving means, display means capable of displaying a character display signal and a television display signal, detecting means means for detecting whether the program received by the television broadcast receiving means is stereo or monaural, and the detecting means. A character display signal output by the character broadcast receiving means and a character display signal output by the television broadcast receiving means according to the result of the above. This has the effect of automatically switching between television display and teletext display.

Further, the video display device according to claim 3 of the present invention can automatically change the display resolution in accordance with the switching between the television and the teletext in the video display device for performing the teletext and the television display. By displaying the teletext display with a high resolution and the TV display with a low resolution, it is possible to eliminate the difficulty of seeing the characters even in the multi-screen display of the teletext display.

The video display apparatus according to a fourth aspect of the present invention is a teletext receiving means for receiving a teletext and outputting a text display signal, and a television for receiving a television broadcast and outputting a television display signal. Broadcast receiving means, display means capable of high resolution display for character display signals and low resolution display for television display signals, character display signal output by the text broadcast receiving means and characters output by the television broadcast receiving means A switching means for selecting one of the display signals and outputting it to the display means; and a display resolution switching means for controlling the display resolution of the display means in conjunction with the switching operation of the switching means. By displaying the teletext display with a high resolution and the TV display with a low resolution, the text display can be displayed in a multi-screen display. Those having an effect of being able to difficulty is eliminated.

The video display device according to claim 5 of the present invention is a video display device for reproducing a music CD and a CDROM accompanied by the video display, and when the CD to be reproduced is a music CD, the power supply of the display system is automatically changed. It is characterized in that it is turned off for a certain period of time, and has an effect of reducing the power consumption when reproducing a music CD.

According to a sixth aspect of the present invention, there is provided a video display device, which includes a CD reproducing means for reproducing a video signal such as a music CD and a video CD, and a display means for displaying the video signal reproduced by the reproducing means. It is characterized by comprising means for identifying that the CD reproduced by the reproducing means is a music CD, and means for turning off the power source of the display means when the identification result of the identifying means is a music CD. Therefore, it has the effect of reducing the power consumption when playing a music CD.

(Embodiment 1) An embodiment of the invention described in claims 1 and 2 of the present invention will be described below with reference to FIG.

In FIG. 1, 1 is a character receiving section for decoding a character broadcast and outputting it as a video signal, 2 is a television broadcast receiving section for receiving a television signal and outputting it as a video signal, 3 is a character broadcast receiving section 1 And a display switching unit for switching and outputting one of the two input video signals output from the television broadcast receiving unit 2, 4 a display unit for displaying the video signal output from the display switching unit 3, and 5 a television broadcast. This is a stereo / monaural signal detection unit that detects whether the audio signal of the program received by the reception unit 2 is a monaural signal or a stereo signal.

In the above structure, the display switching unit 3 performs the switching operation based on the result detected by the stereo / monaural detection unit 5. The switching operation outputs the video signal input from the television broadcast receiving section 2 when the signal is a monaural signal,
At the time of a stereo signal, the switching operation is performed so that the video signal input from the teletext receiving unit 1 is output to the display unit 4. This utilizes the fact that in the current television broadcast programs, broadcast programs are often sent as monaural signals and commercials as stereo signals. By this operation, the user watches the television broadcast when receiving the program, and automatically switches to the teletext display when the commercial is received, and the teletext can be seen.

(Embodiment 2) An embodiment of the invention described in claims 3 and 4 of the present invention will be described below with reference to FIG.

In FIG. 2, reference numerals 1 to 4 are the same as those in the first embodiment except that the display section 4 has a display resolution of at least two or more. Reference numeral 6 is a display switching section. A display resolution switching unit that switches the resolution of the display unit 4 according to the operation.

In the above-mentioned structure, the operation of the display resolution switching unit 6 is such that when the display switching unit 3 displays the video signal of the teletext receiving unit 1, the display unit 4 switches to the higher resolution so that the video of the television broadcast display 2 is displayed. When displaying a signal, the display unit 4 is displayed at a low resolution.

By this operation, the characters displayed at the time of receiving the character broadcast can be displayed with high resolution, so that the characters are easy to see,
Characters are easy to read even when the teletext screen is multi-displayed.

(Embodiment 3) An embodiment of the invention described in claims 5 and 6 of the present invention will be described below with reference to FIG.

In FIG. 3, reference numeral 4 is the same as that of the first embodiment, reference numeral 7 is a CD reproducing section capable of reproducing a display image such as a music CD and video CD, and 8 is a CD reproducing section. A music CD detection unit for automatically discriminating a music CD, and a display unit 4 according to the detection result of the music CD detection unit 8.
It is a display system power supply control unit that turns on / off the power supply of.

In the above structure, the operation of the display system power supply control unit operates so that the power supply of the display unit 4 is turned off when the detection result of the music CD detection unit 8 is the music CD.

By this operation, when the music CD is reproduced, the power of the display unit 4 is turned off to reduce the power consumption.

[0030]

As described above, according to the video display device of the present invention, the television and the teletext can be switched efficiently and automatically, the usability for the user is improved, and the teletext display can be displayed on a multi-screen. Since the legibility of the characters is not impaired even during display, the character broadcast display is improved, and the display unit that consumes a large amount of power when playing a music CD can be deleted.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a video device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a video device according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a video device according to a third embodiment of the present invention.

[Explanation of symbols]

 1 Teletext receiver 2 Television receiver 3 Display switching unit 4 Display unit 5 Stereo / monaural signal detection unit 6 Display resolution switching control unit 7 CD playback unit 8 Music CD detection unit 9 Display system power control unit

Front page continued (72) Inventor Haruko Ishigami 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Mitsunori Ueda 1006 Kadoma, Kadoma City Osaka Prefecture (72) Invention Akira Masuda, 1006 Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Industrial Co., Ltd. (72) Nobuhiro Kikuchi, 1006, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial

Claims (6)

[Claims] 1. A video display device for performing teletext and television display, using an audio multiplex signal when receiving television,
A video display device characterized by switching between teletext display and television display. 2. A teletext receiving means for receiving a teletext and outputting a text display signal, a television broadcasting receiving means for receiving a television broadcast and outputting a television display signal, and a text display signal and a television display signal. Display means, detection means for detecting whether the program received by the television broadcast receiving means is stereo or monaural, and a character display output by the teletext receiving means according to the result of the detecting means. A video display device comprising switching means for selectively switching either one of a signal and a character display signal output by the television broadcast receiving means. 3. A video display device for performing teletext and television display, wherein the display resolution is automatically changed in accordance with switching between the television and the teletext. 4. A teletext receiving means for receiving a teletext and outputting a text display signal, a television broadcasting receiving means for receiving a television broadcast and outputting a television display signal, and a high resolution display for the text display signal. Display means capable of low-resolution display for a television display signal, select either one of a character display signal output by the teletext receiving means and a character display signal output by the television broadcast receiving means, and select the display means. An image display device comprising: switching means for outputting and display resolution switching means for controlling the display resolution of the display means in conjunction with the switching operation of the switching means. 5. A music CD and a CDROM with video display
A video display device for reproducing, wherein when the CD to be reproduced is a music CD, the power supply of the display system is automatically turned off. 6. A CD reproducing means for reproducing a video signal such as a music CD and a video CD, a display means for displaying a video signal reproduced by the reproducing means, and a CD reproduced by the reproducing means.
Is a music CD, and a means for turning off the power supply of the display means when the identification result of the identification means is a music CD.