KR100903118B1 - Television capable of screen elimination - Google Patents

Abstract

The present invention relates to a TV capable of screen erasing, comprising: a tuner and an intermediate frequency processor 20 for tuning and outputting a TV signal composed of audio and video signals received from an antenna 10 and amplifying the TV signal; A voice processor 30 for amplifying the voice signal output from the tuner and the intermediate frequency processor 20 and outputting the amplified voice signal to the voice output unit 31; An image processor 40 amplifying and outputting an image signal output from the tuner and the intermediate frequency processor 20 to the image output unit 41; A DC power supply 42 for supplying DC power to the image processor 40; A first microcomputer 50 generating a screen erasing / reproducing control signal during a screen erasing / reproducing operation; A first image power control unit 43 for blocking / supplying DC power to the image processing unit 40 according to the control signal when receiving the screen erasing / reproducing control signal from the first microcomputer 50; An AC power supply unit 44 for supplying AC power to the image output unit 41; And a second image power controller 45 which cuts off / supplies an AC power to the image output unit 41 according to the control signal when the screen erasing / reproducing control signal is received from the first microcomputer 50. It is characterized in that the TV listening mode / TV is configured so that the viewing mode is achieved by cutting off / supplying the power to the 40 and the image output unit 41.

TV, screen, DC, AC

Description

TV capable of screen erasing

The present invention relates to a TV capable of screen erasing, and more particularly, to a TV capable of screen erasing so that a user can hear TV broadcast contents only with sound when the user is in a position where it is impossible to see TV.

In general, a television (TV) includes an antenna, a tuner, an IF amplifier, an image processor, an image output unit, an audio processor, and an audio output unit. That is, the broadcast signal received through the antenna is tuned by the tuner, and the user's remote control operation selects the broadcasting station desired by the viewer, adjusts the volume, and adjusts the brightness. Among the broadcast signals, the image signal is amplified and colored by the image processor. The audio signal is processed and output to the video output unit, and the audio signal is amplified by the audio processing unit and output to the audio output unit which is a speaker.

Such a conventional TV had a function of allowing only the screen to be viewed through a mute function in a special situation such as a telephone call, but on the contrary, it was impossible to listen to TV broadcast contents only in a location where the TV could not be seen because there was no screen muting function. It was. This consumed unnecessary power for the screen output.

The present invention has been made to solve the above problems, the object of the present invention is to make a TV that can be screen-moving so that the user can hear the TV broadcast contents while having a maximum power saving effect when the user is in a position where it is impossible to see the TV. To provide.

In addition, the present invention is to adjust the volume of the speaker in proportion to the size of the ambient noise so that the user can focus on the broadcast content.

In addition, the present invention is to build a multi-channel speaker to set the volume of the remote control and the speaker in the closest to the user to carry higher than the volume of the other speaker.

In order to achieve the above object, the screen erasable TV of the present invention includes: a tuner and an intermediate frequency processor 20 for tuning and outputting a TV signal consisting of audio and video signals received from the antenna 10 and amplifying the frequency; A voice processor 30 for amplifying the voice signal output from the tuner and the intermediate frequency processor 20 and outputting the amplified voice signal to the voice output unit 31; An image processor 40 amplifying and outputting an image signal output from the tuner and the intermediate frequency processor 20 to the image output unit 41; A DC power supply 42 for supplying DC power to the image processor 40; A first microcomputer 50 generating a screen erasing / reproducing control signal during a screen erasing / reproducing operation; A first image power control unit 43 for blocking / supplying DC power to the image processing unit 40 according to the control signal when receiving the screen erasing / reproducing control signal from the first microcomputer 50; An AC power supply unit 44 for supplying AC power to the image output unit 41; And a second video power controller 45 which cuts / supplies an AC power to the video output unit 41 according to the control signal when the screen erasing / reproducing control signal is received from the first microcomputer 50.

It is characterized in that the TV listening mode / TV mode is achieved by cutting off / supplying power to the image processing unit 40 and the image output unit 41.

In addition, the screen erasable TV of the present invention is a screen mute / playback control signal generated from the first microcomputer 50 is made by reading a signal transmitted from the remote control, and the ultrasonic sensor to the remote control carried by the TV and the user Measure the distance between the TV and the user,

The first microcomputer 50 includes a transceiver 51 for data transmission and reception; A data storage unit 53 for receiving and storing the remote control signal and the ultrasonic sensor signal transmitted from the remote control through the transceiver 51; And receiving the remote controller signal from the data storage unit 53 and reading the remote control signal, and transmitting the screen erasure control signal to the first and second image power control units 43 and 45 if the read result is the screen erasing signal. The screen of the image output unit 41 is performed by transmitting the screen reproduction control signal to the first and second image power control units 43 and 45 if the remote control signal reading result is a screen reproduction signal. Function, and receives the ultrasonic sensor signal from the data storage unit 53 and reads the result, and if the distance between the user and the user is within a certain distance, the first and second image power control units 43 and 45 transmit the screen reproduction control signal. When the distance between the user and the user is greater than a certain distance as a result of the ultrasonic sensor signal reading, the screen output control signal is transmitted to the first and second image power control units 43 and 45. The transmission of the video output unit 41 A central control unit 52 comprises a function to erase the to occur, and

The central controller 52 controls the system by giving priority to a remote control signal manually operated by a user rather than an ultrasonic signal for measuring the distance between the TV and the user.

In addition, the TV according to the present invention is characterized in that the TV is equipped with a noise measuring sensor, the TV volume adjustment is made in proportion to the ambient noise level when switching from the TV viewing mode to the TV listening mode.

The first and second image power supply control units 43 and 45 may include switching means for switching on / off according to the control signal of the first microcomputer 50, and the voltage of the next switching means may be converted into a constant voltage when the switching means is turned off. To control the constant power input to the image processing unit 40 and the image output unit 41 by on / off switching operation according to the zener diode ZD outputted to the terminal and the presence or absence of a constant voltage applied to the zener diode ZD. It is characterized by consisting of a switching means.

The voice output unit 31 includes a multi-channel speaker, and includes an ultrasonic sensor on each speaker and a remote control carried by the user, and measures the distance between the corresponding speaker and the user. The second microphone 34 transmits a voice muting control signal to the 33, and the second microphone 34 is configured to set the volume of the speaker which is the closest to the user.

By providing a TV capable of screen erasing as described above, when the user is in a position where it is impossible to see the TV, the TV broadcast contents can be heard with only a sound while having a maximum power saving effect.

In addition, in the present invention, the volume of the speaker is adjusted in proportion to the amount of ambient noise so that the user can concentrate on the broadcast contents.

In addition, in the present invention, by building a multi-channel speaker by setting the volume of the remote control and the speaker in the closest to the user higher than the volume of the other speaker, the TV broadcast contents can be listened to while minimizing the power consumption.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a TV screen erasable in accordance with an embodiment of the present invention.

Referring to FIG. 1, a TV capable of screen erasing according to the present invention includes a tuner and an intermediate frequency processor 20, an audio processor 30, an audio output unit 31, an image processor 40, an image output unit 41, The DC power supply unit 42 includes a DC power supply unit 42, a first video power control unit 43, an AC power supply unit 44, a second video power control unit 45, and a first microcomputer 50.

The tuner and the intermediate frequency processor 20 tune and tune the TV signal including the audio and video signals received from the antenna 10 to the audio processor 30 and the image processor 40.

The voice processor 30 amplifies the voice signal output from the tuner and the intermediate frequency processor 20 and outputs the amplified voice signal to the voice output unit 31.

The voice output unit 31 is an apparatus for outputting a voice signal to the outside, and may be configured as a 5.1-channel speaker of FIG. 6 as an example.

The image processor 40 amplifies and processes the image signal output from the tuner and the intermediate frequency processor 20 and outputs the color signal to the image output unit 41.

The image output unit 41 is an apparatus for outputting an image signal to the outside, and refers to a TV monitor as an example.

The DC power supply unit 42 is provided to supply DC power to the image processing unit 40.

The first microcomputer 50 is a device for generating a screen erasing / playback control signal during a screen erasing / reproducing operation. Simultaneously sends the screen erasing control signal to the image power control unit 43 and the second image power control unit 45, and if the signal transmitted from the remote controller is a screen reproduction signal, the first microcomputer 50 may include the first image power control unit 43 and The second image power supply controller 45 simultaneously sends out a screen reproduction control signal.

Here, the screen erasing signal is a signal transmitted from the remote controller, and refers to a signal for erasing the screen of the image output unit 41 so that power is not applied to the image output unit 41 while the volume is left as it is. Also, the screen play signal refers to a signal transmitted from a remote controller to play again when the screen is erased. Of course, the transmission of these two signals may be made by the remote controller as described above, but may be made by pressing a button provided on the TV by the user.

When the first image power control unit 43 receives the screen erasing control signal from the first microcomputer 50, the first image power control unit 43 cuts off the DC power supply to the image processing unit 40 according to the control signal, and reproduces the screen from the first microcomputer 50. Upon receiving the control signal, DC power is supplied to the image processor 40 according to the control signal.

The AC power supply unit 44 is provided to supply AC power to the image output unit 41.

When the second image power control unit 45 receives the screen erasing control signal from the first microcomputer 50, the second image power control unit 45 cuts off the AC power supply to the image output unit 41 according to the control signal, and displays the screen from the first microcomputer 50. When the reproduction control signal is received, AC power is supplied to the image output unit 41 according to the control signal.

As described above, in the present invention, the DC power supply 42 and the first video power control unit 43 for supplying / blocking DC power to the image processing unit 40 are provided, and the AC power is supplied / blocked to the image output unit 41. It characterized in that it comprises an AC power supply 44 and the second video power control unit 45 for.

The reason why the DC power supply unit 42 and the AC power supply unit 44 are provided is that the driving of the image processing unit 40 is performed by the DC power supply, and the driving of the image output unit 41 is performed by the AC power supply. Because.

As described above, the present invention enables switching between the TV viewing mode and the TV listening mode by supplying / blocking power to the image processing unit 40 and the image output unit 41.

FIG. 2 is an internal block diagram of the first microcomputer 50 of FIG. 1.

The screen erasing / reproducing control signal generated from the first microcomputer 50 of the present invention is made by reading a signal transmitted from a remote controller. That is, when the signal transmitted from the remote controller is the screen erasing signal, the first microcomputer 50 emits the screen erasing control signal. If the signal transmitted from the remote controller is the screen reproduction signal, the first microcomputer 50 sends the screen reproduction control signal. .

In addition, the present invention may be provided with an ultrasonic sensor (not shown) on the TV and the remote control carried by the user. The ultrasonic sensor is used to measure the distance between the TV and the user. When the ultrasonic signal transmitted from the ultrasonic sensor in the television enters the ultrasonic sensor in the remote controller, the ultrasonic sensor of the remote controller transmits a predetermined signal to the ultrasonic sensor in the television again. The distance can be measured by checking the time when the ultrasonic signal is transmitted and received between the two devices.

Of course, the distance between the TV and the user can be measured using a single ultrasonic sensor. That is, when a signal is transmitted from the transmitter of the ultrasonic sensor provided in the TV, the transmitted signal is reflected by the user or the remote controller carried by the user and received again by the receiver of the ultrasonic sensor. It is possible.

Looking at the configuration of the first microcomputer 50 of the TV to have the function as described above is configured to include a data storage unit 53, the central control unit 52 and the transceiver 51.

The transceiver 51 is provided for data transmission and reception.

The data storage unit 53 receives and stores the ultrasonic sensor signal and the remote control signal transmitted from the remote controller through the transceiver 51. Here, the ultrasonic sensor signal refers to an ultrasonic signal for measuring the distance between the TV and the user as described above.

The central control unit 52 receives the remote control signal from the data storage unit 53 and reads it, and if the result of the readout is a screen erasing signal, the central control unit 52 transfers the screen erasing control signal to the first and second image power control units 43 and 45 to display the image. The screen of the image output unit 41 is transferred to the first and second video power supply control units 43 and 45 by screen erasing of the output unit 41. A function for reproducing and receiving the ultrasonic sensor signal from the data storage unit 53 and reading the result, and if the distance between the user and the user is within a certain distance, the first and second image power supply control units 43 and 45. Transfers the screen playback control signal to the screen playback of the image output unit 41, and if the distance to the user exceeds a predetermined distance as a result of the ultrasonic sensor signal reading to the first and second video power supply control unit (43) (45) Video transmission by screen erasure control signal It performs the function of a screen clearing of the portion 41 is made.

The central control unit 52 prioritizes a remote control signal manually operated by a user rather than an ultrasonic signal for measuring the distance between the TV and the user. In other words, when the screen playback control signal is transmitted from the remote control in a state in which the distance between the TV and the user is over the predetermined distance by the ultrasonic signal and the screen is erased, the remote control signal is prioritized to perform screen playback.

FIG. 3 is a circuit diagram of the first and second image power controllers of FIG. 1.

The first and second image power supply control units 43 and 45 may include switching means for switching on / off according to the control signal of the first microcomputer 50, and the voltage of the next switching means may be converted into a constant voltage when the switching means is turned off. To control the constant power input to the image processing unit 40 and the image output unit 41 by on / off switching operation according to the zener diode ZD outputted to the terminal and the presence or absence of a constant voltage applied to the zener diode ZD. It can be configured as a switching means.

Referring to FIG. 3, the base terminal of the first transistor Q1 is connected to the microcomputer control signal through the first resistor R1 and the collector terminal of the first transistor Q1. Is connected to the base terminal of the second transistor Q2 and the emitter terminal of the first transistor Q1 is grounded.

In addition, the collector terminal of the second transistor Q2 is connected to the DC power supply 42 / AC power supply 44 and the emitter terminal of the second transistor Q2 is connected to the image processing unit 40 / image output unit 41. Connected to the power input terminal.

In addition, the collector terminal of the first transistor Q1 and one terminal of the zener diode ZD are commonly connected.

The other terminal of the zener diode ZD is grounded, and a second resistor R2 is formed between one terminal of the zener diode ZD and the collector terminal of the second transistor Q2.

Referring to the accompanying drawings, the operation of the screen erasable TV of the present invention configured as described above is as follows.

First, the TV signal received from the antenna (ANT) 10 is tuned and the intermediate frequency amplified by the tuner and the intermediate frequency processing unit 20, and then the video signal is output to the image processing unit 40 and the audio signal is the audio processing unit 30 Will be printed).

The image processing unit 40 amplifies and outputs the input video signal and outputs the color signal to the image output unit 41, and the audio processing unit 30 amplifies the input audio signal and outputs it to the audio output unit 31.

In this case, when the screen erasing operation is performed by the user, the screen erasing control signal, that is, the high signal, is applied by the first microcomputer 50 to the first resistor R1 of the first and second image power control units 43 and 45. It is applied to the first transistor Q1 through.

The first transistor Q1 is turned on by the screen erasure control signal input to the base terminal. When the first transistor Q1 is turned on, the collector potential of the first transistor Q1 is turned low. Low), the second transistor Q2 connected to the collector terminal of the first transistor Q1 is turned off.

Therefore, the voltage connected to the collector terminal of the second transistor Q2 is grounded through the emitter terminal of the first transistor Q1.

Therefore, the power supply to the power input terminal of the image processing unit 40 / image output unit 41 is cut off, and thus the screen is in the mute mode (active mode).

In the meantime, since the screen erasing control signal of the first microcomputer 50 becomes low, the first transistor Q1 of the first and second image power control units 43 and 45 is turned off. do.

When the first transistor Q1 is turned off, a constant voltage (zener voltage) is input to the base terminal of the second transistor Q2 by the zener diode ZD, and the second transistor Q2 is turned on. do.

At this time, when the second transistor Q2 is turned on, a constant voltage input from the collector terminal of the second transistor Q2, that is, the DC power supply 42 / AC power supply 44 is an emi of the second transistor Q2. It is applied to the power input terminal of the image processing unit 40 / image output unit 41 through the terminal.

Meanwhile, the image processor 40 amplifies the image signal output from the tuner and the intermediate frequency processor 20 by the input constant voltage and outputs the amplified image signal to the image output unit 41.

As a result, the power output from the DC power supply 42 / AC power supply 44 in the normal operation is supplied to the image processing section 40 / image output section 41.

4 is a block diagram of a TV according to another embodiment of the present invention, in which a voice muting related part is added in the TV block diagram of FIG. 1.

When only the voice muting portion is described, the voice power supply unit 32, the voice power control unit 33, and the second microcomputer 34 are configured.

The voice power supply unit 32 is provided to supply power to the voice processing unit 30.

When the voice power control unit 33 receives the voice mute control signal from the second microcomputer 34, the voice power controller 33 cuts off the power supply to the voice processor 30 according to the control signal.

The second microcomputer 34 is a device for generating a voice muting control signal during a voice muting operation. For example, if the signal transmitted from the remote controller is a voice muting signal, the second microcomputer 34 controls the voice muting by the voice power control unit 33. By sending a signal, the voice power controller 33 cuts off the power supplied to the voice processor 30. In addition, the second microcomputer 34 adjusts the volume of the speakers constituting the voice output unit 31.

The internal structure of the second microcomputer 34 having such a configuration includes a transceiver 34a, a controller 34b, and a memory device 34c as shown in FIG.

The transceiver 34a is provided for data transmission and reception, and the memory device 34c stores the ultrasonic sensor signal and the remote controller signal transmitted from the remote controller through the transceiver 51.

The ultrasonic sensor is for measuring the distance between each speaker and the user as shown in FIG.

The second microcomputer 34 controls the volume of the speakers constituting the voice output unit 31 by directly controlling the voice output unit 31 as well as the function of outputting the voice mute control signal to the voice power control unit 33 as described above. Sometimes. This volume adjustment will be described with reference to FIGS. 6 and 7 below.

6 is a 5.1-channel home theater system diagram, and FIG. 7 is an exemplary diagram showing the volume of speakers according to a distance between a remote controller and a speaker.

As described above, in the present invention, the audio output unit 31 may be configured as a speaker of multiple channels (for example, 5.1 channels).

First, referring to FIG. 6, a 5.1 channel home theater system includes a center speaker 61, a left front speaker 62, a right front speaker, a left rear speaker, a right rear speaker, and a subwoofer speaker.

In the present invention, an ultrasonic sensor is provided to measure the distance between each speaker and the user. The distance measuring method using the ultrasonic sensor described in the description of FIG. 2 is used.

The distance value between the speaker and the user is stored in the data storage unit 53 of the second microcomputer 34.

In the present invention, after measuring the distance between each speaker and the user, as shown in Figure 7, the volume of the user and the speaker in the shortest distance is set to the largest, and the volume of the speaker farthest from the user is set to be low. This allows the broadcast content to be delivered to the user well.

In FIG. 7, the volume of the left front speaker 62 at the nearest distance (1 m) with the user is set to the highest level (4 dB), and the volume of the subwoofer speaker at the far distance (4 m) with the user is set to the lowest value (1 dB). do. The volume adjustment of the speaker according to the distance between the user and the speaker is made in the second microcomputer 34, and the setting of this value depends on the user's experience value.

On the other hand, the present invention may be provided with a noise measuring sensor in the TV, TV volume adjustment in proportion to the ambient noise level when switching from the TV viewing mode to the TV listening mode may be configured. In other words, the volume of each speaker of the 5.1 channel of FIG. 6 can be adjusted simultaneously according to the noise level. This is to listen to the TV broadcast contents.

As described above, with reference to the preferred embodiment of the present invention, those skilled in the art will be variously modified and modified within the scope of the present invention without departing from the spirit and scope of the present invention described in the claims below. It will be appreciated that it can be changed.

1 is a block diagram of a TV screen erasable in accordance with an embodiment of the present invention;

2 is an internal block diagram of the first microcomputer 50 of FIG. 1;

3 is a circuit diagram of a first and a second image power controller of FIG. 1;

4 is a block diagram of a TV according to another embodiment of the present invention;

5 is an internal block diagram of the second microcomputer 34 of FIG. 4;

6 is a 5.1-channel home theater system diagram;

7 is an exemplary view illustrating the volume of speakers according to a distance between a remote controller and a speaker.

<Description of the symbols for the main parts of the drawings>

10: antenna

20: Tuner and intermediate frequency processor

30: voice processing unit

31: audio output unit

32: voice power supply

33: voice power control unit

34: Second Microcomputer

34a: transceiver

34b: controller

34c: memory device

40: image processing unit

41: video output unit

42: DC power supply

43: first image power control unit

44: AC power supply

45: second image power control unit

50: First Microcomputer

51: transceiver

52: central control unit

53: data storage

61: center speaker

62: left front speaker

63: Right front speaker

64: left rear speaker

65: Right Rear Speaker

66: subwoofer speaker

R1: first resistance

R2: second resistor

Q1: first transistor

Q2: 2nd transistor

ZD: Zener Diode

Claims (5)

A tuner and an intermediate frequency processor 20 which tunes and outputs a TV signal comprising audio and video signals received from the antenna 10 and amplifies and tunes the TV signal; A voice processor 30 for amplifying the voice signal output from the tuner and the intermediate frequency processor 20 and outputting the amplified voice signal to the voice output unit 31; An image processor 40 amplifying and outputting an image signal output from the tuner and the intermediate frequency processor 20 to the image output unit 41; A DC power supply 42 for supplying DC power to the image processor 40; A first microcomputer 50 generating a screen erasing / reproducing control signal according to the screen erasing / reproducing signal transmitted from the remote controller and transmitting the generated screen erasing / reproducing control signal to the first image power controller 43 and the second image power controller 45; A first image power control unit 43 for blocking / supplying DC power to the image processing unit 40 according to the control signal when receiving the screen erasing / reproducing control signal from the first microcomputer 50; An AC power supply unit 44 for supplying AC power to the image output unit 41; And When the screen erasing / reproducing control signal is received from the first microcomputer 50, the image processing unit includes a second image power control unit 45 which cuts / supplies AC power to the image output unit 41 according to the control signal. 40) and the TV output mode 41 to cut off the power supply to provide a TV listening mode / TV watching mode, The remote control carried by the TV and the user is equipped with an ultrasonic sensor to measure the distance between the TV and the user. The first microcomputer 50, Transmitting and receiving unit 51 for transmitting and receiving data; A data storage unit 53 for receiving and storing the ultrasonic sensor signal and the remote controller signal transmitted from the remote controller through the transceiver 51; And Receives and reads the remote control signal from the data storage unit 53, and if the result of the screen erasing signal, and transmits the screen erasing control signal to the first and second video power supply control unit 43 (45) of the image output unit 41 Screen erasing is performed, and if the remote control signal reading result is a screen playback signal, a screen playback control signal is transmitted to the first and second video power control units 43 and 45 to perform screen playback of the video output unit 41. And, receives the ultrasonic sensor signal from the data storage unit 53 and reads, and if the distance to the user as a result of the reading within the predetermined distance transfers the screen playback control signal to the first and second image power control unit 43, 45 To reproduce the screen of the image output unit 41, and transmits the screen erasure control signal to the first and second image power control units 43 and 45 when the ultrasonic sensor signal reading results in a distance exceeding a predetermined distance. Screen of the video output unit 41 That includes the central processing section 52 comprises a function of to occur, The central control unit 52 is capable of screen erasing, characterized in that to control the system by prioritizing the remote control signal manually operated by the user rather than the ultrasonic signal for measuring the distance between the TV and the user. A tuner and an intermediate frequency processor 20 which tunes and outputs a TV signal comprising audio and video signals received from the antenna 10 and amplifies and tunes the TV signal; A voice processor 30 for amplifying the voice signal output from the tuner and the intermediate frequency processor 20 and outputting the amplified voice signal to the voice output unit 31; An image processor 40 amplifying and outputting an image signal output from the tuner and the intermediate frequency processor 20 to the image output unit 41; A DC power supply 42 for supplying DC power to the image processor 40; A first microcomputer 50 generating a screen erasing / reproducing control signal according to the screen erasing / reproducing signal transmitted from the remote controller and transmitting the generated screen erasing / reproducing control signal to the first image power controller 43 and the second image power controller 45; A first image power control unit 43 for blocking / supplying DC power to the image processing unit 40 according to the control signal when receiving the screen erasing / reproducing control signal from the first microcomputer 50; An AC power supply unit 44 for supplying AC power to the image output unit 41; And When the screen erasing / reproducing control signal is received from the first microcomputer 50, the image processing unit includes a second image power control unit 45 which cuts / supplies AC power to the image output unit 41 according to the control signal. 40) and the TV output mode 41 to cut off the power supply to provide a TV listening mode / TV watching mode, Equipped with an ultrasonic sensor on the TV to measure the distance between the TV and the user, The first microcomputer 50, Transmitting and receiving unit 51 for transmitting and receiving data; A data storage unit 53 for receiving and storing the remote control signal and the ultrasonic sensor signal transmitted from the remote control through the transceiver 51; And Receives and reads the remote control signal from the data storage unit 53, and if the result of the screen erasing signal, and transmits the screen erasing control signal to the first and second video power supply control unit 43 (45) of the image output unit 41 Screen erasing is performed, and if the remote control signal reading result is a screen playback signal, a screen playback control signal is transmitted to the first and second video power control units 43 and 45 to perform screen playback of the video output unit 41. And, receives the ultrasonic sensor signal from the data storage unit 53 and reads, and if the distance to the user as a result of the reading within the predetermined distance transfers the screen playback control signal to the first and second image power control unit 43, 45 To reproduce the screen of the image output unit 41, and transmits the screen erasure control signal to the first and second image power control units 43 and 45 when the ultrasonic sensor signal reading results in a distance exceeding a predetermined distance. Screen of the video output unit 41 That includes the central processing section 52 comprises a function of to occur, The central control unit 52 is capable of screen erasing, characterized in that to control the system by prioritizing the remote control signal manually operated by the user rather than the ultrasonic signal for measuring the distance between the TV and the user. The method according to claim 1 or 2, The TV is equipped with a noise measurement sensor, the TV can be screen mute, characterized in that configured to adjust the TV volume in proportion to the ambient noise level when switching from the TV viewing mode to TV listening mode. The method according to claim 1 or 2, The first and second image power supply control units 43 and 45 may include switching means for switching on / off according to the control signal of the first microcomputer 50, and the voltage of the next switching means may be converted into a constant voltage when the switching means is turned off. To control the constant power input to the image processing unit 40 and the image output unit 41 by on / off switching operation according to the zener diode ZD outputted to the terminal and the presence or absence of a constant voltage applied to the zener diode ZD. TV capable of screen erasing, characterized in that consisting of a switching means. The method according to claim 1 or 2, The audio output unit 31 is configured to include a multi-channel speaker, Each speaker and the remote control carried by the user are equipped with an ultrasonic sensor to measure the distance between the speaker and the user. The ultrasonic sensor signal is transmitted to the second microcomputer 34 which transmits a voice muting control signal to the voice power control unit 33, so that the volume of the speaker which is closest to the user and the most closest is set by the second microcomputer 34. The screen can be screened, characterized in that configured TV.

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