JP2002158943A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a television receiver automatically displaying in the brightest screen on a display by mere standing of in the dark a person in front of the receives and continuing the screen display only for a necessary time without operating at all and also having a function as an automatic lighting type illumination means. SOLUTION: The television receiver comprises an illuminometer 14 for measuring an illuminance of a forward side, a comparing means 18 for outputting a darkness sense signal when a measured illuminance of the illuminometer becomes a reference illuminance or below, a human body sensor 19 for sensing the presence of the body in a human body sensing area E set to the forward side without contact to output a human body sense signal, and a controller 10 for entirely displaying the display 9 in white by turning on a power source, when both the darkness sense signal and the body sense signal are output and erasing the entire display in white when a output of one of the darkness sense signal and the body sense signal is eliminated to turn off the power source.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a television receiver having a function of automatically turning on a person only in front of a cabinet in a room at midnight or in the dark and also having a function as an illumination lamp. Things.

[0002]

2. Description of the Related Art Conventionally, many systems for detecting the presence or absence of a human body and automatically controlling an air conditioner, a lighting device, and the like have been devised. For example, Japanese Patent Application Laid-Open No. H11-304221 discloses that a room is divided into a plurality of control units, an air-conditioning blowout unit and a lighting device are provided for each control unit, and a human body detection sensor and a television camera of an infrared detection system are provided. There is disclosed an indoor environment control device that is installed and automatically adjusts the output from a blowing unit and a lighting device of a control unit where no human is present based on the positional relationship between the control unit and the control unit where a human is present.

Japanese Patent Application Laid-Open No. 3-234198 discloses that a human body detection sensor is incorporated in a remote control device for controlling various electric devices such as a lighting device, an air conditioner, and a television receiver in a general household. Accordingly, when a person enters a room, an automatic control technique has been proposed in which a human body detection sensor detects the person, transmits a lighting signal to the lighting device, and automatically turns on the lighting device.

[0004]

In the above-mentioned prior art, the lighting lamp can be automatically turned on at the same time as a person enters a night or dark room. On the other hand, for example, when you wake up at midnight and go to the bathroom in a dark room, or when you come home at night and enter a dark room, lighting that just illuminates your feet with faint light Therefore, the automatic lighting means used for such an application is not a large-scale device as in the above-described conventional technology,
Inexpensive things are required. That is, JP-A-11-304
In the device of No. 221, the human body detection sensor provided on the ceiling surface of the room detects a person entering the room and outputs a detection signal to the computer, and the computer quickly turns on the lighting device, Image processing of video signals captured by a TV camera is performed to adjust the amount of light of each lighting device according to the space and the number of people in which people exist. This is too large for use in general homes as described above. Too expensive.

On the other hand, the remote control device disclosed in Japanese Patent Application Laid-Open No. 3-234198 transmits an infrared control signal for controlling the lighting device from the transmitter based on the output of the human body detection signal from the human body detection sensor. In addition, it is necessary to energize the control signal receiving unit and the automatic lighting device in the lighting device, which is expensive. Therefore, in ordinary households, it is cheaper to always light the miniature bulb than to attach the expensive automatic lighting device as described above. Moreover, in both of the conventional techniques, the illumination device is automatically turned on when the human body detection sensor detects a person even at a brightness that does not require illumination. To prevent this, it is necessary to take measures such as providing a new setting switch for automatic lighting mode.
In that case, not only is it more expensive, but the switch must be operated each time to set the automatic lighting mode. There is also.

[0006] Apart from the above, in ordinary households, when the user wakes up at midnight, the television receiver is turned on by a remote control transmitter placed on the bedside, and the CRT or LCD is turned on.
It is also possible to go to the toilet safely by dimly illuminating the room on the screen of the display. Since this lighting means uses the light of the screen display of the display of the television receiver permanently installed in almost all ordinary households instead of the lighting, there is an advantage that it does not cost separately, but the remote control transmitter in the darkness If you forget to turn down the volume before going to bed, and if you are broadcasting late at night, a loud audio signal will be output even at midnight, causing inconvenience to householders and neighbors. There is a risk of failure such as putting on.

In view of the foregoing, the present invention has been made in view of the above-mentioned conventional problems, and the display is automatically displayed on the brightest screen only when a person is positioned in front of the cabinet in the dark, and the screen display is performed. It is an object of the present invention to provide a television receiver which can be continuously operated for a required time without operating a remote control transmitter, and which also has a function as an automatic lighting type illumination means.

[0008]

According to one aspect of the present invention, there is provided a television receiver, comprising: an illuminometer for measuring illuminance on a front side of a television receiver main body; Comparing means for comparing the measured illuminance with a preset reference illuminance and outputting a darkness detection signal when the measured illuminance is equal to or less than the reference illuminance, and a human body detection set on the front side of the television receiver main body. A human body detection unit that detects the presence of a human body in the area in a non-contact manner and outputs a human body detection signal.When both the darkness detection signal and the human body detection signal are output, the power is turned on and then the entire display is white. And a control unit that controls to turn off the power by deleting the entire white display of the display when the output of either the darkness detection signal or the human body detection signal is lost. .

In this television receiver, when a person who wakes up at midnight gets up to go to the tray, or when a person who comes home at midnight enters a room in total darkness, the person receives the television reception. The power is automatically turned on when the vehicle enters the human body detection area set in front of the machine body, and then a white display is displayed on the entire surface of the display. Since the full white display on this display is the brightest display, it functions as an illuminator that illuminates the room with faint light, so without any operation,
It can be safely moved indoors. Also, when a person goes out of the room or turns on the lighting device, the white display on the display is completely erased and the power is automatically turned off. Can be displayed in full white, and when the illuminance in the room is a predetermined value or more, even if a human body enters the human body detection area, full white display of the display is not performed, thereby preventing wasteful power consumption. be able to.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the television receiver further includes an automatic lighting mode setting switch for setting an automatic lighting mode. The control based on the output of the darkness detection signal and the human body detection signal is performed only when the lighting mode is set.

According to this configuration, in a situation where the automatic lighting mode is unnecessary, it can be canceled, so that unnecessary white display on the display can be prevented. For example, when the light in the room is turned off in the lightning state, every time a person enters the human body detection area, it is possible to prevent the display from being entirely displayed in white.

Further, a television receiver according to a third aspect of the present invention, in addition to the configuration according to the first or second aspect,
The human body detection unit includes: an optical system that sets a predetermined human body detection area according to a light receiving direction and an angle; and an electric signal corresponding to a variation amount of radiant infrared energy from the human body detection area that is condensed and incident by the optical system. And a level detection circuit that detects the presence of a human body in the human body detection area and outputs a human body detection signal when an electric signal output from the infrared detection element exceeds a reference level. It is configured for passive infrared detection.

According to this configuration, the human body detection area can be arbitrarily set according to the light receiving direction and the angle of the optical system. Therefore, the human body detection area can be set in the vicinity of the entrance and the sleeping place in the room in front of the cabinet. If the awakened person moves slightly,
Alternatively, the display can be entirely displayed in white at a preferable timing when entering the room. In addition, this human body detection unit has a light-receiving unit installed and wired or a light-transmitting unit and a light-receiving unit in places other than the television receiver main unit, as compared with the human body detection system in which the human body blocks the infrared laser. It has the advantage that it does not require any optical axis alignment with the camera, and it does not require settings such as the back surface to reflect light as compared to the human body detection method based on the presence or absence of light reflection. There is no restriction on the installation location of the John receiver.

According to a fourth aspect of the present invention, in addition to the configuration according to any one of the first to third aspects, the television receiver further comprises an audio muting circuit for muting an audio signal, and However, when both the darkness detection signal and the human body detection signal are output, the power supply is turned on to drive the audio muting circuit, and then the display is controlled to display white.

[0015] According to this configuration, when the display on the entire screen is displayed in white while the channel being broadcast late at night is selected, the audio signal being broadcast is not output by the audio muting circuit. It does not bother others or surprise themselves with sudden audio output.

[0016]

Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a television receiver according to one embodiment of the present invention. In the figure, in order to facilitate understanding, a well-known configuration that is inevitably provided for practical use is omitted and illustrated as a simplified configuration.

That is, the television receiver body 1 includes a receiving antenna 2 for a television broadcast wave, a broadcast receiving unit 3 including a well-known tuner, an IF (intermediate frequency) amplifying unit, a detecting unit, and the like. An audio processing unit 4 including an audio demodulation unit, an audio amplification unit, an audio output unit, and the like; a speaker 7 that outputs an audio signal of a television broadcast wave;
A video processing unit 8 including a well-known video amplification unit, a color demodulation unit, a video output unit, and the like, a display 9 such as a CRT or an LCD for displaying a video signal on a screen, and a CPU for controlling each unit and a CPU to be executed A control unit 10 having a ROM or the like in which a control program or the like is stored and controlling each unit of the television receiver main unit 1; and a power supply circuit 1 for supplying required driving power to each unit of the television receiver main unit 1
1 is provided. The above configuration is almost the same as the existing configuration provided in the conventional television receiver.

Further, the television receiver body 1 includes:
An audio muting circuit 12 and a video muting circuit for muting the audio signal and the video signal output from the broadcast receiving unit 3 in accordance with a command from the control unit 10 to cut off the input to the audio processing unit 4 and the video processing unit 8, respectively. 13, an illuminometer 14 for measuring the illuminance in the room where the television receiver is installed, and comparing the measured illuminance of the illuminometer 14 with the reference illuminance preset in the reference illuminance setting unit to determine the measured illuminance. A comparator 18 that outputs a darkness detection signal when the illuminance falls below the reference illuminance, and a human body detection unit 19 that detects the presence or absence of a human body in a human body detection area set indoors, which will be described later, without contact are newly provided. I have. The details of the human body detection unit 19 will be described later. Illuminance meter 1
4 is a device capable of measuring the illuminance of both illumination light and natural light, for example, a configuration capable of correcting the required spectral sensitivity and angle characteristics by receiving light with a Se photocell through an angle correction glove and a visibility correction filter. Are preferred.

The above-mentioned human body detecting section 19 has a human body detecting sensor 20 of a passive infrared detecting system in which an infrared detecting element 21 and an optical system 22 are combined. As the infrared detection element 21, a passive infrared detection element such as a pyroelectric element, a thermistor bolometer or a thermopile is used,
A moving human body is detected by detecting far-infrared rays emitted from the surface of the human body and clothes. The optical system 22 is composed of a Fresnel lens, a prism, or a mirror that focuses infrared energy on the infrared detection element 21 and causes the infrared energy to enter. The weak electric signal output from the infrared detecting element 21 is amplified by the amplifier circuit 23, and the signal strength of the amplified electric signal, that is, the fluctuation amount of the infrared light flux is constantly monitored by the level detecting circuit 24 including the comparing circuit. I have. That is, the level detection circuit 14 constantly compares the signal level of the input electric signal with a reference level preset in the reference level setting unit 27, and detects a change in the electric signal that exceeds the reference level. Output a signal.

Further, when a condition to be described later is satisfied, the control unit 10 includes a power supply circuit 11 in the television receiver body 1.
And an automatic lighting mode setting switch S1 for setting an automatic lighting mode in which the display 9 is completely white-displayed after the main power is turned on, and a malicious illegal intruder is detected and alarmed when leaving the house. An alarm mode setting switch S2 for setting an alarm mode for outputting a sound is provided. Further, the television receiver body 1 is provided with an alarm signal generator 28 for outputting an alarm sound from the speaker 7 when a condition described later is satisfied in a state where the alarm mode is set.

FIG. 2 is a perspective view showing the television receiver of the above embodiment. This embodiment exemplifies a case in which the human body detection sensor 20 and the illuminometer 14 are arranged at a lower position on the front of the cabinet for the purpose of maintaining the appearance of the design. However, the human body detection sensor 20 and the illuminometer 14 may be arranged on the top of the cabinet in a direction in which illuminance in a predetermined range on the front side of the cabinet can be measured and a moving human body can be detected.

FIG. 3 is a right side view for explaining the setting of the human body detection area E in which the human body detection sensor 20 can detect a human body. The human body detecting sensor 20 using the infrared detecting element 21 does not measure a partial temperature, but generates a pyroelectric effect due to a human body moving in a human body detecting area E which is a light receiving range of the infrared detecting element 21. Is used to detect the presence of a human body in the human body detection area E. The human body detection area E includes the optical system 2
It can be set arbitrarily according to the two types, the light receiving direction and the angle. In this embodiment, as shown in the figure, the inside of the human body detection area E is set at the entrance of the room near the sliding door 29 or the door. However, it is preferable that the television receiver be installed so that the human body detection area E is set at a location avoiding a space where a bed or a futon is laid in a room.

In this embodiment, the human body detector 1
9 is configured by the human body detection sensor 20 that detects a human body in a non-contact manner using the infrared detection element 21, but may be configured by using a Doppler sensor. Doppler sensors
By using the Doppler effect of microwaves, it is possible to detect, for example, a moving object that is close to a certain distance, and it is possible to detect a human body existing in a close range as in the case of using the infrared detecting element 21. These human body detection units 19
Is compared with the human body detection system in which the infrared laser is cut off by the human body, the installation of the light receiving unit in a location other than the television receiver body 1, the wiring, or the optical axis alignment of the light emitting unit and the light receiving unit It has the advantage of requiring no settings such as a back surface for light reflection compared to the human body detection method based on the presence or absence of light reflection. No restrictions.

Next, control processing when the automatic lighting mode or the alarm mode is set in the television receiver of the above embodiment will be described with reference to FIG. 4 which is a flowchart showing the algorithm. In FIG. 4, the control unit 10 always monitors whether or not the automatic lighting mode is set by turning on the automatic lighting mode setting switch S1 (step S1). The television receiver according to the present embodiment does not cause any inconvenience even when it is always set to the automatic lighting mode, which will be apparent from the following description.

When it is determined that the automatic lighting mode is set, the control unit 10 determines whether or not the surroundings are lower than a predetermined illuminance based on the output of the comparator 18 (step S2). When it is determined that the following conditions are satisfied, it is determined whether or not a human exists in the human body detection area E based on the presence or absence of the output of the human body detection signal from the human body detection unit 19 (step S3). That is, the control unit 10 constantly monitors whether or not the condition that a person is present in the human body detection area E is satisfied in an ambient environment of a predetermined illuminance or less.

When a person who is sleeping in a dark room at midnight wakes up and tries to go to the bathroom, the comparator 18 determines that the illuminance measured by the illuminometer 14 is higher than the illuminance set by the reference illuminance setting unit 17. Therefore, a darkness detection signal is output to the control unit 10. Here, the reference illuminance is set to a level that allows natural light to enter through the window glass at midnight, and is set to a level that does not allow a human to sufficiently visually recognize the surrounding situation.

On the other hand, when a person who gets up from the futon moves into the human body detecting area E by slightly moving his body toward the entrance of the room, the infrared detecting element 21 is transmitted through the optical system 22.
Is changed so that the amount of infrared energy radiated from the human body detecting area E increases by the amount of infrared energy radiated from the human body with respect to the amount of infrared energy radiated from the background of the human body detecting area E. The weak electric signal is amplified by the amplifier circuit 23 and then input to the level detection circuit 24. In the reference level setting section 27, a reference level corresponding to the amount of infrared energy radiated from the background of the human body detection area E is set. Therefore, when a person enters the human body detection area E, the level detection circuit 24 detects that the electric signal from the amplifier circuit 23 has fluctuated beyond the reference level, and outputs a human body detection signal to the control unit 10. Output. Accordingly, the control unit 10 determines that a human body is present in the human body detection area E in a state where the illuminance is equal to or less than the predetermined illuminance, and controls to turn on the power switch of the main power supply of the power supply circuit 11 (step S4).

At the same time when the power switch is turned on, the control section 10 determines whether or not the alarm mode is set by turning on the alarm mode setting switch S2 (step S5), and the alarm mode is set. If not, a command is issued to the audio muting circuit 12 and the video muting circuit 13 to cut off the audio signal and the video signal from the broadcast receiving unit 3, respectively. R in the signal circuit 8a,
A command is issued to output a color signal from a specific output port that outputs all colors of G and B. This specific output port is not newly provided, but is used for the aging process of the screen in the manufacturing process of the television receiver, and the existing output port which the television receiver has conventionally had Use as is.

As described above, the entire surface of the display 9 is displayed in white (step S6). That is, the brightest display is made on the display 9, and the room is automatically illuminated with faint light. Therefore, the person who gets up can be safely lit by opening the sliding door 29 without hitting or stumbling, since the surroundings are illuminated by a faint light without any operation. At this time, the television receiver body 1
In this case, even if a channel being broadcast late at night is selected, the audio signal being broadcast is not output by the audio muting circuit 12, so that it may inconvenience family members or neighbors or suddenly No surprises with the audio output.

After displaying white on the entire surface of the display 9, the control unit 10 activates a timer function unit incorporated therein to start measuring a predetermined time, and at the same time, simultaneously starts the human body detection unit 1.
It is determined whether or not a human body exists in the human body detection area E based on the presence or absence of the input of the human body detection signal from Step 9 (Step S).
7) The person who got up goes out of the room and the human body detection area E
When the human body no longer exists, the monitoring of the presence or absence of the human body in the human body detection area E is continued until it is determined that the predetermined time has elapsed by the time-up of the timer function unit (step S8) (step S8). . The predetermined time is preferably set to, for example, about 3 minutes. During the predetermined time, white display on the entire surface of the display 9 is continued.

Therefore, when a person who enters the toilet returns to the room within a predetermined time, the person can enter the futon without any trouble by the white light on the entire surface of the display 9. Thereafter, when the predetermined time has elapsed, the control unit 10 erases the white display on the display 9 (step S9), and then turns off the main power switch of the power supply circuit 11 (step S10). Therefore, a person who goes to the toilet at midnight can safely get out of the room without any operation by the light that is automatically illuminated at the moment when he gets up and moves slightly, and returns to the room and returns to the room. Can enter.

On the other hand, if the person has not returned to the room until the predetermined time has elapsed from the human body detection area E, the control unit 10 determines that the predetermined time has elapsed (step S8). At this point, after the white display on the display 9 is erased (step S9), the main power switch is turned off (step S10), thereby preventing unnecessary power consumption. However, after turning off the main power switch, the control unit 10 repeats the same control processing as described above. Therefore, when it is determined that the person returns to the room and enters the human body detection area E (step S3), After the main power switch is turned on (step S5), white display is performed on the entire surface of the display 9 (step S6).
People who enter the room can still move to the futon without any operation.

Apart from the above, when a person who comes home in the middle of the night enters a room with complete darkness, the control unit 10 performs the control processing of the above-described steps S1 to S6, and simultaneously enters the room and displays the display at the same time. 9 is displayed in white (step S6). Thus, a person entering the room can easily select a desired channel by operating the lighting device or operating the remote control transmitter. Then, the control unit 10 determines that a human body is present in the human body detection area E by inputting a human body detection signal from the human body detection unit 19 after displaying the entire surface of the display 9 in white (Step S).
7) After that, it is determined whether or not the illuminance in the room is equal to or more than a predetermined value based on the output from the comparator 18 (Step S11). The determination of whether or not the channel has been selected (step S12) is repeated.

When a person entering the room turns on the lighting device, the control unit 10 determines that the illuminance is equal to or higher than a predetermined value (step S11). After instructing the signal circuit 8a to cancel the white display on the display 9 (step S13), the audio muting circuit 12 and the video muting circuit 13 are instructed to stop driving. As a result, the television receiver body 1 returns to the normal state, the broadcast program of the channel selected when the power is turned off is displayed on the display 9, and the audio signal is output from the speaker 7 (step). S14).

On the other hand, when a person entering the room selects a desired channel by operating the remote control transmitter by relying on the light in which the entire surface of the display 9 is displayed in white prior to the lighting operation of the lighting device, The control unit 10 determines that the channel is selected (step S12), cancels the white display on the display 9 in the same manner as described above (step S13), and then sets the audio muting circuit 12 and the video muting circuit. 13 is instructed to stop driving. Thereby, the television receiver body 1 displays the broadcast program of the channel selected by the operation of the remote control transmitter on the display 9 as an image, and outputs the audio signal from the speaker 7 (step S14). If a person who enters the room takes a short break without immediately performing any of the lighting operation of the lighting device and the channel selection operation, the control unit 10
Determines that a human body is present in the human body detection area E, and does not instruct the measurement of a predetermined time, so that the state of white display on the entire surface of the display 9 continues.

As is apparent from the above description, in this television receiver, if the room in which the television receiver is installed has an illuminance of a brightness equal to or higher than a predetermined value, the human body is detected in the state where the automatic lighting mode is set. Even if a human body enters the area E, the white display on the entire surface of the display 9 is not executed, and if the human body does not exist in the human body detection area E even if the illuminance in the room is equal to or less than a predetermined value, the display 9 is displayed. Since no white display is performed on the entire surface of the device, no trouble occurs.

When leaving the house to go on a business trip or a trip, the alarm mode can be set by turning on the alarm mode setting switch S2. If a malicious intruder enters the room with the alarm mode set, the control unit 10 sets the above-described steps S1 to S
By the control process of 3, it is determined that a human body is present in the human body detection area E under a predetermined illuminance or less and the main power switch is turned on (step S4), and then it is determined that the alarm mode is set. (Step S5), white display is performed on the entire surface of the display 9 (Step S15).

If an illegal intruder surprised by the sudden sudden white display of the entire surface of the display 9 escapes to the outside of the room, the control unit 10 determines that a predetermined time has elapsed without releasing the alarm mode. (Steps S16 and S17)
After that, it is confirmed that there is no human body in the human body detection area E (step S18), the white display on the display 9 is erased (step S9), and then the main power switch is turned off (step S10). . In this way, when the trespasser immediately escapes, the warning sound described below is not used to threaten the trespasser, thereby preventing unnecessary inconvenience to the neighborhood.

If the intruder has not escaped from the room despite the fact that the entire surface of the display 9 is displayed in white, the control unit 10 determines that a predetermined time has elapsed (step S17). When it is determined that a human body exists in the human body detection area E (step S18), a drive command is issued to the alarm signal generator 28. Thereby, the speaker 7
Then, an alarm signal is output from the alarm signal generator 28 (step S19), and the alarm sounds to intimidate an illegal intruder. When the alarm sound has been output for a certain period of time, the control unit 10 turns off the main power switch (Step S10) after deleting the white display on the display 9 (Step S9). When an illegal intruder who has once escaped enters the room again, an alarm sound is output again by the same control processing as described above.

On the other hand, when a housekeeper who has returned home at midnight from a business trip or travel enters a dark room, the control unit 10 detects the human body under a predetermined illuminance or lower by the control processing of steps S1 to S3 described above. It is determined that a human body exists in the area E, and the main power switch is turned on (step S
4) After that, it is determined that the alarm mode is set (step S5), and white display is performed on the entire surface of the display 9 (step S15). Here, if the family member turns on the lighting device within a predetermined time (preferably about 3 minutes) or immediately turns off the alarm mode setting switch,
The controller 10 determines that the alarm mode has been released (step S16), erases the white display on the display 9 (step S9), and turns off the main power switch (step S10).

When the alarm mode is set, white display is displayed on the display 9 and a display urging the cancellation of the alarm mode, such as "generate various alarms based on the alarm mode setting", is displayed. Is preferable. As a result, the resident can immediately release the alarm mode, and on the other hand, can give anxiety to a trespasser.

[0042]

As described above, according to the television receiver of the present invention, when the presence of a human body in the human body detection area on the front side of the cabinet is detected in an environment where the illuminance is equal to or less than a predetermined value, When the power is turned on and the display is displayed entirely white, a person who wakes up at midnight gets up to go to the tray or a person who comes home at midnight enters a completely dark room In addition, since the room can be illuminated with a faint light by the white display on the entire surface of the display, the room can be safely moved without any operation. Also, when a person goes out of the room or turns on the lighting device, the white display on the display is completely erased and the power is automatically turned off. Can be displayed in full white, and when the illuminance in the room is a predetermined value or more, even if a human body enters the human body detection area, full white display of the display is not performed, thereby preventing wasteful power consumption. be able to.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a television receiver according to one embodiment of the present invention.

FIG. 2 is a perspective view of the above television receiver.

FIG. 3 is a right side view showing a setting of a human body detection area in the television receiver.

FIG. 4 is a flowchart showing an algorithm of a control process of the television receiver of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Television receiver main body 9 Display 10 Control part 12 Audio muting circuit 14 Illuminometer 18 Comparator (comparing means) 19 Human body detecting part 21 Infrared detecting element 22 Optical system 24 Level detecting circuit S1 Automatic lighting mode setting switch E Human body detecting area

Claims (4)

[Claims] An illuminometer for measuring the illuminance on the front side of a television receiver body, and comparing the measured illuminance of the illuminometer with a preset reference illuminance, when the measured illuminance is equal to or less than the reference illuminance. Comparing means for outputting a darkness detection signal to a human body detection unit for non-contactly detecting the presence of a human body in a human body detection area set on the front side of the television receiver body and outputting a human body detection signal; When the detection signal and the human body detection signal are both output,
After turning on the power, white display is performed on the entire surface of the display, and when the output of either the darkness detection signal or the human body detection signal is lost, control is performed so that the white display on the entire display is erased and the power is turned off. A television receiver comprising a control unit. 2. The control device according to claim 1, further comprising an automatic lighting mode setting switch for setting an automatic lighting mode, wherein the control unit performs control based on the output of the darkness detection signal and the human body detection signal only when the automatic lighting mode is set. A television receiver configured to perform. 3. The human body detection unit according to claim 1, wherein the human body detection unit includes an optical system that sets a predetermined human body detection area according to a light receiving direction and an angle, and a human body detection area that is condensed and incident by the optical system. An infrared detection element that converts radiated infrared energy into an electric signal corresponding to the amount of fluctuation, and detects the presence of a human body in the human body detection area when the electric signal output from the infrared detection element exceeds a reference level. A television receiver comprising a passive infrared detection system including a level detection circuit for outputting a human body detection signal. 4. The apparatus according to claim 1, further comprising an audio muting circuit for muting an audio signal,
When the darkness detection signal and the human body detection signal are both output, the control unit is configured to perform control to turn on a power supply and drive the audio muting circuit, and then display white on the display. Television receiver.