JPH07107405A - Television receiver - Google Patents

Abstract

PURPOSE:To reduce the power consumption of a TV receiver and to prevent a user from forgetting to switch off the TV receiver in the audio mode by stopping a deflecting and high voltage generating circuit in the audio mode and automatically turning off the main power source at the time of fall of the input to the silent state. CONSTITUTION:When a user selects the audio mode by a remote controller 1, a remote control signal is inputted from the remote controller 1 to a remotely controlled light reception part 2. The remote control signal is converted into an audio mode selection signal by the light reception part 2 and is outputted to a CPU 3. The CPU 3 outputs a deflection and high voltage turning-off signal, which stops the deflecting operation and the high voltage generating operation of a deflecting and high voltage generating circuit 9, to a deflection and high voltage control circuit 5 in accordance with the audio mode selection signal from the light reception part 2. When the deflection and high voltage turning-off signal is inputted t0 the circuit 5, the circuit 5 stops the deflecting operation and the high voltage generating operation of the circuit 9, and a picture is not displayed on the surface of a CRT 4. At this time, power is supplied from the power source to an audio signal amplifying circuit 14, and sounds are outputted from a speaker 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to power saving of a television receiver (hereinafter referred to as TV receiver).

[0002]

2. Description of the Related Art Some current TV receivers have an image erasing function that erases an image and outputs only a sound signal. An image signal such as all blue is created and output on the screen to erase the image, and the circuit related to the image display is in an operating state. When the TV receiver is used only for audio, it is economical to turn off circuits other than those related to audio signals. However, when nothing is displayed on the screen at the time of image erasing, it is difficult to determine whether the main power supply of the TV receiver is on or off, which leads to forgetting to turn off the main power supply of the TV receiver. Further, it is more functionally advantageous to operate a small signal system circuit other than the circuit related to the audio signal. Therefore, it is economical and preferable to stop only the operation of the deflection high voltage circuit that consumes the most power.

As a related publicly known example, for example, Japanese Patent Laid-Open No. Hei 4
There is one described in Japanese Patent Publication No. 271584.

[0004]

In the conventional TV receiver, in the audio mode in which the image is erased and only the audio is enjoyed, the deflection high-voltage circuit is operating, and in the audio mode, power consumption equivalent to that in the normal state is consumed. Was there. In voice mode,
When the voice input becomes silent, the main power of the TV receiver is forgotten to be turned off, resulting in wasting power.

An object of the present invention is to save power of a TV receiver and prevent forgetting to turn off the TV receiver in a voice mode.

[0006]

In order to save power in a voice mode, a remote control means is used for C
The deflection high voltage control means for turning on and off only the deflection high voltage circuit from the PU is used.

In order to prevent the user from forgetting to turn it off in the audio mode, the audio mode selection display means is used to make the user recognize that the TV receiver is operating in the audio mode. Further, the presence or absence of an audio signal is detected by the audio signal detecting means, and when the audio input is in the silent state, the CPU detects the duration of the silent state, and when the silent state continues for a certain time, the main power source control means is used. Turn off the main power.

In order to automatically select the on / off of the audio mode, a means for detecting the presence or absence of a video signal is used. When no video signal is input, the duration of the non-input state is determined from the output of the detection means. When it is detected by the CPU and the non-input state continues for a certain period of time or more, the deflection operation and the high voltage generation operation are stopped by using the means for stopping the deflection operation and the high voltage generation operation.

In order to prevent forgetting to turn off the TV receiver in the normal state, the image detecting means detects the presence / absence of a video signal, the audio signal detecting means detects the presence / absence of an audio signal, and the CPU detects the presence of the video signal and the audio signal. When the duration of the non-existing state is detected, and this state continues for a certain period of time, the main power source control means is used to turn off the main power source.

[0010]

When the user selects the voice mode, the voice mode selection signal is output from the remote control means,
The CPU outputs a deflection high voltage OFF signal for stopping the deflection operation and the high voltage generation operation to the deflection high voltage control means according to the audio mode selection signal. The deflection high voltage control means controls the deflection high voltage circuit so as to stop the deflection operation and the high voltage generation operation in response to the deflection high voltage OFF signal from the CPU. At the same time, a display ON signal for turning on the display is output from the CPU to the display control means, and the selection of the audio mode is displayed on the audio mode selection display means. When the user selects the cancellation of the voice mode, the remote control means outputs a voice mode cancellation signal, and the CPU deflects the deflection high voltage ON signal for restarting the deflection operation and the high voltage generation operation according to the voice mode cancellation signal. Output to the high voltage control means.
The deflection high voltage control means controls the deflection high voltage circuit so as to restart the deflection operation and the high voltage generation operation in response to the deflection high voltage ON signal from the CPU. At the same time, a display off signal for turning off the display is output from the CPU to the display control means, and the sound mode selection display means displays the cancellation of the sound mode.
Therefore, the power consumption in the audio mode is reduced and the user is made aware of the on / off of the audio mode, and it is possible to prevent forgetting to turn off the TV receiver.

Further, even in the normal state in which the audio mode is not selected, the video signal detecting means detects that there is no video signal, and at the same time the audio signal detecting means detects that there is an audio signal. If it is determined that this state has continued for a certain period of time, the CPU automatically outputs the display on signal to the display control means and the deflection high voltage off signal to the deflection high voltage control means so that the voice mode is set to the voice mode. . Further, when the audio mode is automatically set as described above, when the video signal is detected again by the video signal detection means, the audio mode is automatically canceled so that the CP
U outputs a display off signal to the display control means and a deflection high voltage on signal to the deflection high voltage control means to release the audio mode.

In the voice mode, when the voice signal detecting means detects that there is no voice signal for a certain period of time or more, the CPU outputs a main power-off signal for turning off the main power source to the main power source controlling means, and the main power source controlling means. The control means operates to turn off the main power supply.

In the normal state, the video signal detecting means and the audio signal detecting means detect that there is no video signal and no audio signal, and when the CPU determines that this state continues for a certain period of time, the CPU determines A main power supply off signal for turning off the power supply is output, and the main power supply control means operates to turn off the main power supply.

Therefore, in the audio mode, the deflection high voltage circuit is stopped to prevent forgetting to turn off the main power supply of the TV receiver, and
Power saving of the V receiver can be achieved.

[0015]

Embodiment 1 A first embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a block diagram showing the inside of the TV receiver of the first embodiment, and FIG. 2 is a diagram showing a specific configuration of a deflection high voltage control circuit for stopping the deflection operation and high voltage generation operation of the deflection high voltage circuit. is there.

In FIG. 1, reference numeral 1 is a remote control device (hereinafter abbreviated as remote controller) used when a user selects a voice mode, and 2 is a remote controller for receiving an optical signal output from the remote controller and converting it into an electric signal. Light receiving section,
3 is a TV for the audio mode selection signal from the remote control light receiving unit
A CPU for converting into a control signal necessary for controlling each circuit inside the receiver, 4 is a power supply circuit of a deflection high voltage circuit, and 5 is
A deflection high voltage control circuit for turning on and off the deflection operation and the high voltage generation operation of the deflection high voltage circuit according to the deflection high voltage control signal from the CPU, 6 is a video signal and audio signal input terminal to which a video signal and an audio signal are input, Reference numeral 7 is an input signal selection circuit for selecting a video signal and an audio signal, 8 is a sync separation circuit for separating a sync signal in a video signal, 9 is a deflection high voltage circuit for performing a deflection operation and a high voltage generation operation, and 10 is a A video signal processing circuit that performs Y / C separation, signal correction, and signal amplification, 11 a deflection coil that performs a deflection operation, 12 an anode terminal of a CRT, 13 a CRT that displays an image, and 14 an audio signal. An audio signal amplifier circuit for performing amplification, and 15 is a speaker.

The operation of selecting and canceling the audio mode in which the image of the TV receiver is erased and only the audio signal is output using the speaker of the TV receiver will be described. When the user selects the audio mode using the remote controller 1, a remote controller control signal is input from the remote controller 1 to the remote controller light receiving unit 2 of the TV receiver. The remote control control signal is converted into a voice mode selection signal by the remote control light receiving unit 2 and output to the CPU 3. The CPU 3 outputs a deflection high voltage OFF signal for stopping the deflection operation and the high voltage generation operation of the deflection high voltage circuit 9 to the deflection high voltage control circuit 5 in response to the audio mode selection signal from the remote control light receiving unit 2. When the deflection high voltage OFF signal is input to the deflection high voltage control circuit 5, the deflection high voltage control circuit 5 stops the deflection operation and the high voltage generation operation of the deflection high voltage circuit 9, and the CRT
No image is displayed on the 4th screen. At this time, power is supplied to the audio signal amplifier circuit 14 from the power source and the speaker 15
More sound is output. When canceling the voice mode, the user selects the cancel of the voice mode by using the remote controller 1, so that the signal processing is performed as in the case of the voice mode, and the deflection high voltage control circuit 5 causes the CPU 3 to deflect the high voltage circuit 9.
The deflection high voltage ON signal for restarting the deflection operation and the high voltage generation operation is output. When the deflection high voltage ON signal is input to the deflection high voltage circuit 5, the deflection high voltage circuit 5 resumes the deflection operation and the high voltage generation operation of the deflection high voltage circuit 9, and an image is displayed on the surface of the CRT 13.

In FIG. 2, 16 and 17 are transistors, and 18 is a resistor. CPU3 in normal state
As a result, a voltage is applied to the transistor 16 so that the transistor 16 is always in the same state. At that time, the collector voltage of the transistor 16 is at a low level. Power is supplied from the power supply and the deflection high voltage circuit operates.
When the deflection high voltage off signal is input from the CPU 3, the transistor 16 is cut off, and the collector voltage of the transistor 16 becomes high level at that time. Therefore, the transistor 17 is cut off, the deflection high voltage circuit 9 and the power supply circuit 4 are cut off, and the deflection high voltage circuit 9 stops the deflection operation and the high voltage generation operation. When the deflection high voltage ON signal is input from the CPU 3 again, the transistor 16 is in the same communication state, and the transistor 17 is also in the same communication state. Therefore, power is supplied from the power supply circuit 4 to the deflection high-voltage circuit 9, the deflection operation and the high-voltage generation operation are restarted, an image is displayed on the CRT tube surface, and the normal state is set.

Further, in order to stop the deflection operation and the high voltage generation operation of the deflection high voltage circuit, the signal going from the synchronous separation circuit to the deflection high voltage circuit may be controlled by using the deflection high voltage control circuit.

Therefore, the deflection operation and the high voltage generation operation of the TV receiver can be stopped in the audio mode, and the power consumption can be reduced.

Second Embodiment A second embodiment according to the present invention will be described below with reference to FIG.

FIG. 3 is a block diagram showing the inside of the TV receiver of the second embodiment. In FIG. 3, 19 is a CP
A display control circuit for controlling the audio mode selection display means in response to a display control signal from U3, and 20 is an LED light emitting element for displaying selection and cancellation of the audio mode. When the voice mode is set in the same manner as in the first embodiment (the remote control 1, the remote control light receiving unit 2, the power supply circuit 4, the deflection high voltage control circuit 5, the video signal voice signal input terminal 6, the input signal selection circuit 7 until the voice mode is set, Sync separation circuit 8, deflection high voltage circuit 9, video signal processing circuit 10, deflection coil 11, anode terminal 12,
The operations of the CRT 13, the audio signal amplifier circuit 14, and the speaker 15 are the same as those in the first embodiment, and therefore will be omitted. ) CPU
3 outputs a deflection high voltage OFF signal to the deflection high voltage control circuit 5, and at the same time, outputs a display ON signal for turning on the display to the display control circuit 19, and the display control circuit 19 turns on the LED light emitting element 20 and outputs the sound mode. Is displayed,
When the voice mode is canceled, the deflection high voltage ON signal is output from the CPU 3 to the deflection high voltage control circuit 5, and at the same time,
A display-off signal for turning off the display is output to the display control circuit 19, and the display control circuit 19 turns off the LED light-emitting element 20 to display the cancellation of the audio mode. (The remote controller 1, the remote controller light receiving unit 2, the power supply circuit 4, the deflection high voltage control circuit 5, the video signal audio signal input terminal 6, the input signal selection circuit 7, the sync separation circuit 8, and the deflection high voltage circuit 9 until the audio mode is released. Since the operations of the video signal processing circuit 10, the deflection coil 11, the anode terminal 12, the CRT 13, the audio signal amplification circuit 14, and the speaker 15 are the same as those in the first embodiment, the description thereof is omitted.) Therefore, the user can see the CRT 9 surface. It is possible to confirm that the TV receiver is operating in the audio mode even if it is all black, and it is possible to prevent forgetting to turn off the TV receiver.

Third Embodiment A third embodiment of the present invention will be described with reference to FIGS. 4, 5, and 6.

FIG. 4 is a block diagram showing the inside of the TV receiver of the first embodiment, FIG. 5 is a block diagram showing the concrete constitution of the video signal detection circuit, and FIG. 6 shows the operation of FIG. It is a figure for explaining. In FIG. 4, reference numeral 21 is a video signal detection circuit for detecting the presence or absence of a video signal. Even in the normal state in which the audio mode is not selected, the fact that there is no sync signal which is the output signal of the sync separation circuit 8 means that the video signal detection circuit 2
1 is detected and input to the CPU 3. When the CPU 3 determines that the video signal has not been input for a certain period of time,
The deflection high voltage OFF signal is output to the deflection high voltage control circuit 5, and the voice mode is set. (Power circuit 4 until voice mode,
Deflection high voltage control circuit 5, video signal / audio signal input terminal 6, input signal selection circuit 7, sync separation circuit 8, deflection high voltage circuit 9,
The operations of the video signal processing circuit 10, the deflection coil 11, the anode terminal 12, the CRT 13, the audio signal amplifying circuit 14, and the speaker 15 are the same as those in the first embodiment, and will not be described. )
Further, in the case where the audio mode is set as described above, when it is detected that the video signal is present in the video signal detection circuit 21 again, the deflection high voltage ON signal is output from the CPU 3 to the deflection high voltage control circuit 5, and the audio mode is set. Is canceled. (Power supply circuit 4, deflection high voltage control circuit 5, video signal audio signal input terminal 6, input signal selection circuit 7, sync separation circuit 8, deflection high voltage circuit 9, video signal processing circuit 10, deflection until the audio mode is released Coil 11, anode terminal 12, CRT1
3, the operation of the audio signal amplifier circuit 14, the speaker 15,
Since it is the same as the first embodiment, the description thereof is omitted. Therefore, it becomes possible to automatically deselect the voice mode.

In FIG. 5, 22 is a retriggerable monostable multivibrator (hereinafter abbreviated as monostable multi).
Is. Here, the operation of detecting the presence / absence of the horizontal synchronizing signal will be described. When the video signal is input to the sync separation circuit 8, the sync separation circuit 8 outputs the horizontal sync signal of FIG. 6A and is input to the monostable multi 22. The output pulse width T of the monostable multi 22 is set to a horizontal period of 1H or more. When the horizontal synchronizing signal FIG. 6 (a) is present, the output of the monostable multi 22 becomes high level. Next, time t
At 1, when the horizontal synchronizing signal disappears, the output of the monostable multi 22 becomes low level at time t2 when T has elapsed from time t1. Output signal of monostable multi 22 When FIG. 6B is at high level, the CPU 3 determines that a video signal is present, and outputs a control signal to operate the deflection high voltage circuit. On the other hand, the output signal of the monostable multi 22 shown in FIG.
When (b) is at a low level, the CPU 3 determines that there is no video signal and outputs a control signal to stop the deflection high voltage circuit 9. Therefore, when there is no video signal, the operation of the deflection high voltage circuit 9 is automatically stopped and the audio mode is set,
When a video signal is input in the audio mode, the normal state of outputting video and audio is set.

Fourth Embodiment A fourth embodiment of the present invention will be described with reference to FIGS. 7 and 8.

FIG. 7 is a block diagram showing the inside of the TV receiver of the fourth embodiment, and FIG. 8 is a block diagram showing the concrete structure of the voice detection circuit. In FIG. 7, 23 is an audio signal detection circuit that detects the presence or absence of an audio signal, 24 is a main power supply control circuit that controls the main power supply circuit of the TV receiver by a main power supply control signal from the CPU 3, and 25 is a TV image receiver. It is the main power circuit of the machine. When the audio mode is set as in the first embodiment or the third embodiment, the power supply circuit 4, the deflection high voltage control circuit 5, the video signal audio signal input terminal 6, the input signal selection circuit 7, the sync separation until the audio mode is set are displayed. The operations of the circuit 8, the deflection high voltage circuit 9, the video signal processing circuit 10, the deflection coil 11, the anode terminal 12, the CRT 13, the audio signal amplifier circuit 14, and the speaker 15 are the same as those in the first embodiment, and will not be described. The presence or absence of the signal is detected by the audio signal detection circuit 23 and output to the CPU 3. When the CPU 3 determines that the audio signal has not been input for a certain period of time in the audio mode, it outputs a main power supply off signal for turning off the main power supply to the main power supply control circuit 24. The main power supply control circuit 24 turns off the main power supply circuit 25 in response to the main power-off signal to prevent forgetting to turn off the TV receiver in the audio mode.

Next, the operation of the audio signal detection circuit will be described with reference to FIG. In FIG. 8, the input signal selection circuit 7 and C
Since the PU 3 is the same as that of the first embodiment, its explanation is omitted.
The peak hold circuit 26 is a circuit that holds the positive peak value of the audio signal, and the comparator 27 is a comparator that outputs a low level when a voltage higher than the positive threshold voltage Eth is input. If a voice signal exists and the voice signal is input from the input selection circuit 7 to the peak hold circuit 26, a positive peak value of the voice signal is output from the peak hold circuit 26. This positive peak value is input to the comparator 27, and the comparator 27
Outputs a high level signal. When the output of the comparator 27 is at high level, the CPU 3 determines that a voice signal is present. The reset signal of the CPU 3 is a signal for resetting the output voltage of the peak hold circuit 26, and the peak hold circuit 26 is reset at regular time intervals. Next, when the voice disappears, the output of the peak hold circuit 26 becomes 0v, and the comparator 27 compares them and outputs a low level signal. The CPU 3 detects this low-level period, and when the low-level period is longer than the fixed period, it is determined that there is no audio signal.
Therefore, the presence / absence of the audio signal can be automatically determined.

Embodiment 5 A fifth embodiment of the present invention will be described with reference to FIG.

FIG. 9 is a block diagram showing the inside of the TV receiver of the fifth embodiment. In the normal state in which the audio mode is not selected in FIG. 9, the presence or absence of the sync signal which is the output signal of the sync separation circuit 8 is checked by the video signal detection circuit 21.
Is detected and input to the CPU 3. At the same time, the audio signal of the input signal selection circuit 7 is detected by the audio signal detection circuit 23 for the presence / absence of an audio signal, and is input to the CPU 3. When the CPU 3 determines that neither the video signal nor the audio signal is input, and determines that this state continues for a certain time or longer, it outputs a main power supply off signal to the main power supply control circuit 24. The main power supply control circuit 24 turns off the main power supply circuit 25 in response to the main power supply off signal.

Therefore, it is possible to prevent forgetting to turn off the TV receiver even in the normal state.

[0032]

According to the present invention, power consumption is reduced by stopping the deflection high voltage circuit in the audio mode in which the image is erased and only the audio is output, and the main power is automatically turned off when the input becomes silent. It can be reduced.

Also, by attaching an audio mode display circuit, the user can confirm that the TV receiver is operating, and if there is no video signal, it automatically enters the audio mode and the power of the video system circuit is turned on. In addition, when there is neither video signal nor audio signal, the main power supply is automatically turned off, so that wasteful power due to forgetting to turn off can be saved.

[Brief description of drawings]

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

FIG. 2 is a configuration diagram showing a specific configuration of a deflection high voltage control circuit.

FIG. 3 is a block diagram showing a second embodiment of the present invention.

FIG. 4 is a block diagram showing a third embodiment of the present invention.

FIG. 5 is a configuration diagram showing a specific configuration of a video signal detection circuit.

6 is an explanatory diagram of the operation of FIG.

FIG. 7 is a block diagram showing a fourth embodiment of the present invention.

FIG. 8 is a configuration diagram showing a specific configuration of an audio signal detection circuit.

FIG. 9 is a block diagram showing a fifth embodiment of the present invention.

[Explanation of Codes] 1 ... Remote control device, 2 ... Remote control light receiving unit, 3 ... CPU, 4 ... Power supply circuit, 5 ... Deflecting high voltage control circuit, 6 ... Video signal audio signal input terminal, 7 ... Input signal selection circuit, 8 ... sync separation circuit, 9 ... deflection high voltage circuit, 10 ... video signal processing circuit, 11 ... deflection coil, 12 ... anode terminal, 13 ... CRT, 14 ... audio amplification circuit, 15 ... speaker, 16 ... transistor, 17 ... transistor, 18 ... Resistor, 19 ... Display control circuit, 20 ... Light emitting element, 21 ... Video signal detection circuit, 22 ... Monostable multivibrator, 23 ... Audio signal detection circuit, 24 ... Main power supply control circuit, 25 ... Main power supply circuit, 26 … Peak hold circuit, 27… Comparator.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Makoto Onozawa Makoto Onozawa 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Ltd.

Claims (5)

[Claims] 1. In a television receiver using a cathode ray tube (hereinafter referred to as a TV receiver), remote control means for controlling the video and audio states of the TV receiver, and an output signal from the remote control means. TV
A central processing unit (hereinafter abbreviated as CPU) for converting into a control signal necessary for controlling each circuit inside the receiver, and a CP
The deflection and high voltage generation operation is turned on and off by the deflection high voltage control means for turning on and off the deflection operation and the high voltage generation operation according to the deflection high voltage control signal from U, and the deflection high voltage control means.
An audio mode selection is provided in which a deflection high-voltage circuit to be turned off is provided, and the remote control means is selected by the user to stop the image display operation and select a mode in which only audio is output (hereinafter referred to as audio mode). A television receiver provided with a means for selecting and canceling an audio mode by using a remote control means. 2. The audio mode display means for displaying that the state of the TV receiver is in the audio mode, and the display for controlling the audio mode display means according to the display control signal from the CPU. A television receiver provided with a control means. 3. A video signal detecting means for detecting the presence / absence of a video signal according to claim 1, and a case where the video signal is not detected for a certain period of time in a state where an audio mode is not selected (hereinafter, abbreviated as a normal state). Selects the audio mode, stops the deflection operation and the high voltage generation operation of the deflection high voltage circuit, and when the video signal is detected again, cancels the audio mode and outputs the control signal to the normal state. A television receiver having an additional CPU. 4. A voice signal detecting means for detecting the presence or absence of a voice signal according to claim 1, and a period during which there is no voice signal is measured from an output signal of the voice signal detecting means. C that outputs a control signal to turn off the main power supply
A television receiver comprising a main power supply control means for controlling on / off of a main power supply based on output signals from the PU and the CPU. 5. The video signal detecting means for detecting the presence / absence of a video signal, the audio signal detecting means for detecting the presence / absence of an audio signal, and the output signals of the video signal detecting means and the audio signal detecting means according to claim 1. CP that outputs a control signal that turns off the main power source when the period when there is no video signal and audio signal is measured, and when neither the video signal and audio signal exist for a certain period
A television receiver provided with main power supply control means for controlling on / off of a main power supply based on an output signal from U and a CPU.