JPH0865599A - Device for preventing too close viewing of television - Google Patents

Abstract

PURPOSE: To prevent an infant or a child from becoming shortsighted by prepar ing an automatic switching means for turning off a power supply for a television (TV) by a sensor and a reset button for turning on the power supply. CONSTITUTION: The close TV viewing prevention device A is arranged on the upper front of a TV body. A pyroelectric infrared-ray sensor system 1 detects infrared rays from a child trying to observe a TV screen from too close a loeation and disconnects a plug socket 19 for supplying power to the TV by a switching transistor-(TR) 50 and a relay to turn off the power supply of the TV. In the case of connecting the disconnected plug socket 19, a pushbutton switch 16 (reset button) is depressed in order to allow a current to flow into a reset coil 15b of the relay 15. Thereby a neon tube for displaying the connection is turned on. Since the TV power supply is automatically disconnected when a child approaches the TV screen up to a certain degree and the reset button is depressed by a mother or the like in order to turn on the power supply again, the device A can prevent an infant or a child from becoming shortsighted.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a television (T
The present invention relates to a near-vision hearing preventer for preventing myopia and eyes by automatically watching a television at a predetermined distance when viewing V) so as not to damage myopia and eyes.

[0002]

2. Description of the Related Art Conventionally, if the user does not watch the television at an appropriate distance from the screen of the television, myopia is likely to occur. Especially, for infants and children,
When watching TV, we tend to try to get close to the screen of the TV. Therefore, when infants or children watch conventional televisions, mothers and fathers take care not to let infants or children watch the television screens close to each other.

[0003]

However, infants, children, and the like have a tendency to come close to the vicinity of the screen of the television when watching the television, and therefore the television is inevitably close to the screen of the television. There was a problem such as getting stuck in the screen of my and causing myopia. Further, according to the conventional television, the dust is attracted to the cathode ray tube of the television due to the static electricity, is reflected by the glass on the surface of the television screen and enters the eyes, and as a result, the eyes are damaged.

The present invention has been made in order to solve the above-mentioned problems, and its object is to automatically control when an infant or a child comes within a certain range on the screen of the television (within a range where myopia is likely to occur). To prevent the infant or child from becoming short-sighted and to prevent myopia from occurring, the mother must press the reset button to turn off the television and turn on the television again. An object of the present invention is to provide a near-vision hearing protector that can be prevented from being attracted to the cathode-ray tube of a television by static electricity and reflected on the glass on the surface of the television screen to enter the eye, resulting in injury to the eye. Is.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems. According to the television near-field hearing preventer described in "Claim 1", it is attached to a television. A sensor that detects when it comes close to a predetermined range of the screen of the TV, an automatic switching unit that is provided between the sensor and the power supply unit of the TV, and that turns off the power based on the information of the infrared sensor, and the automatic switching unit. And a reset button for turning on the power of the television which is connected to the automatic switching means and is turned off by the automatic switching means.

[0006]

According to the present invention having the above-mentioned configuration, the sensor mounted on the television and detecting when a person approaches within a predetermined range of the screen of the television, the sensor, and the power source of the television. Since it has an automatic switching means for turning off the power based on the information of the sensor and a reset button for turning on the power of the television, which is connected to the automatic switching means provided between the parts, The sensor detects it when it comes close to the TV screen to some extent, and the automatic switching means automatically turns off the TV, so that the mother etc. must press the reset button to turn on the TV again Since it is configured to prevent myopia of infants and children from becoming short-sighted, dust is attracted to the cathode ray tube of the TV by static electricity and the screen of the TV screen is displayed. Of glass is reflected in enters the eye, also it will be able to prevent that hurt its results first.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a near-vision hearing aid for television according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the television near-field hearing preventer of the present invention mounted on a television, FIG. 2 is a circuit block diagram showing a basic circuit configuration used in the television near-field hearing protector, and FIG. FIG. 3 is an explanatory diagram showing the internal structure of an infrared sensor used in the television near-field hearing preventer.

As shown in FIG. 1, the television near-viewing preventive device A of the present invention is installed on the front surface of the upper portion of the television 25. The pyroelectric infrared sensor system 1 has a screen 25 of a TV 25.
Infrared rays of a child trying to come close to a are detected, and the switching transistor 50 and the relay 15 shown in FIG. Has been done. To bring the outlet 19 into contact, the push button switch 16 (reset button) is pushed in order to pass a current through the reset coil 15b of the relay 15 shown in FIG. Reference numeral 20 denotes a neon tube, which lights up when the outlet 19 is "contacted" and indicates that it is "contacted". Reference numeral 26 shown in FIG. 1 denotes a power plug of the television 25, which is inserted into the outlet 19. Further, numeral 23 is a power cord of the television, and numeral 24 is a power cord of the near-vision hearing aid A of the television. Further, 18 is a power switch of the switching transistor 50 and the pyroelectric infrared sensor system 1 (automatic switching means), which pushes the push button switch 16 of the relay 15, connects the contact 15c, and then disconnects the outlet 19 for connection. As it is, the operation of the near-vision hearing preventer A becomes irrelevant. Incidentally, in the case of an ordinary relay having only one set coil, the contact point is automatically restored, so it is not necessary to reset the push button switch 16. In the figure, reference numeral 21 is a power switch of the near-vision hearing aid A of the television.

That is, as shown in FIG. 2, according to the present invention, a pyroelectric infrared system 1 allows a child to set up a television set 2.
It detects that it is close to 5, sends the signal to the switching transistor 50, operates the relay 15, and automatically turns off the power of the television 25. That is,
As shown in the figure, the pyroelectric infrared sensor system 1 used for the TV near-viewing preventive device A includes a pyroelectric infrared sensor 10a, a chopper 10b, a slit 10c, a temperature sensor 10d, an amplifier 11a, and a bandpass filter. 11c, a rectifying circuit 11d, and a comparator 11d. Therefore, the infrared rays emitted from the human body are chopped by the chopper 10b, and the slit 1
It is incident on the pyroelectric infrared sensor 10a through 0c. The current flowing through the pyroelectric infrared sensor 10a is amplified by the amplifier 11a. The bandpass filter 11b removes noise from the amplified signal and enters the rectifier circuit 11c to be converted into direct current. Then, the ambient temperature (reference voltage) detected by the temperature sensor 10d and the comparator 11
Compared in d. When the output at the point P is higher than the reference value (higher than the ambient temperature) as compared with the comparator 11d.
This voltage is applied between the base and emitter of the switching transistor 50 by resistors (R1) 30 and (R2) 40. For example, if the base-emitter voltage (VBE) is off (current does not flow from the collector to the emitter) when the base-emitter voltage (VBE) is about 0.6V or less, the base-emitter voltage (VBE) is about 0.6V.
When it becomes above, it will be in the state of ON (current flows from the collector to the emitter). Switching transistor 50
When the pyroelectric infrared sensor system 1 detects only the ambient temperature (reference voltage), the base-emitter voltage (VBE) is set to about 0.6V or less by the resistors (R1) 30 and (R2) 40. , Current does not flow between the collector and emitter, and the switching transistor 50 is OF
The state becomes the F state. On the other hand, pyroelectric infrared sensor system 1
When the infrared ray emitted from the human body is detected and a voltage higher than the ambient temperature (reference voltage) is detected, the base-emitter voltage (VBE) of the switching transistor 50 is detected.
Is about 0.6 due to the resistances (R1) 30 and (R2) 40.
It becomes higher than V, a current flows between the collector and the emitter, and the switching transistor 50 is turned on. Utilizing the switching action of the switching transistor 50, the relay 15 is operated, a current is passed through the set coil 15a, and the contact 15c of the relay is opened. When this contact 15c is opened, naturally the outlet 1
9 is "OFF", and if the power plug of the TV 25 is plugged into the outlet 19, the power of the TV 25 is turned off.
Becomes That is, when the pyroelectric infrared sensor system 1 detects infrared rays from the human body, the switching action of the switching transistor 50 causes the relay 15
Is activated, the contact 15c is opened, and the outlet 19 is turned off, so that the television 25 is turned off because the power source is connected thereto. Child is tv 2
The power of the TV 25 will be turned off when the position of 5 is approached. Set coil 1 instead of keep relay
If only one ordinary relay is used, if there is a child near the TV, the pyroelectric infrared system 1 detects infrared rays from the human body and compares them with the ambient temperature, and the voltage is the resistance (R1).
If the base-emitter voltage (VBE) of the switching transistor 50 is about 0.6 V or more, the switching transistor 5 is divided by 30 and (R2) 40.
It is connected to the collector of 0, current flows through the set coil 15a, and the contact 15c is opened. When the child moves away from the TV 25, infrared rays are not detected, so the base-emitter voltage (VB
E) goes down to about 0.6V or less, and therefore
No current flows through the coil 15a, and the contact 15c is connected. That is, the contact 15c automatically returns. The relay 15 is a keep relay. The keep relay has two coils. When power is applied to the set coil 15a, the contact 15 of the relay 15
c operates, but the human body is removed from the side of the television 25, and the base-emitter voltage (VBE) of the switching transistor 50 becomes about 0.6 V or less.
Even if the current of 5a is cut off, the contact 15c keeps the same state. Therefore, in order to restore the disconnected contact 15c to its original state, the push button switch 16 is operated to pass a current through the reset coil 15b to connect the contact 15c. The power supply rectifier circuit 17 is for supplying a DC voltage to the switching transistor 50 and the pyroelectric infrared sensor system 1. Switch 18 is when not using the operation of the present invention. When the push button switch 16 is operated to cause a current to flow through the reset coil 15b and the switch 18 is turned off while the contact 15c is connected, the contact 15c remains connected. Reference numeral 20 is a lamp for displaying a state in which the contact 15c is connected by a neon tube, that is, a state in which the outlet 19 is connected. Further, the switch 21 is a power switch of the near-TV hearing aid A, and 22 is a power plug.

FIG. 3 is an explanatory view showing the internal structure of the pyroelectric infrared sensor 10a of the pyroelectric infrared sensor system 1. The pyroelectric infrared sensor 10a has a cap 12b whose front surface is closed by a window member 12a. And stem 12
The inside of the case 12d formed by c is composed of the blackening film 13a, the sensing element 13b, the alumina substrate 13c, and the FFT 13d, and the ground terminal 14a, the source terminal 14b, and the drain element 14c are provided outside the stem 12c.

The television near-field hearing preventer A of the above-described embodiment having the above-mentioned configuration is used as follows. For example,
When a child approaches the screen 25a of the television 25 to some extent, the infrared sensor detects it and the automatic switching means automatically turns off the television 25. In addition, when the power of the TV 25 is turned on again, the mother or the like presses the reset button 16
Since it has to be pushed, it is possible to prevent infants and children from becoming short-sighted, and dust is attracted to the CRT of the TV by static electricity and the TV 2
It is also possible to prevent the reflection of the glass on the surface of the screen 25a of No. 5 into the eyes and the resulting damage to the eyes. In this embodiment, the pyroelectric infrared sensor 10a is used as the sensor, but it goes without saying that an ultrasonic sensor may be used as the sensor.

[0012]

According to the present invention having the above-mentioned structure, the infrared sensor mounted on a television and detecting when a person approaches within a predetermined range of the screen of the television and the infrared ray thereof. Provided between the sensor and the power supply section of the television, linked to the automatic switching means for turning off the power based on the information of the infrared sensor and the automatic switching means,
Since it has a reset button for turning on the power of the TV, the infrared sensor detects it when the child approaches the screen of the TV to some extent, and the TV is automatically turned off by the automatic switching means, To turn on the TV again, mothers have to press the reset button to prevent infants and children from becoming short-sighted, and dust is attracted to the CRT of the TV by static electricity. It has various effects such as being able to prevent the eye from being reflected by the glass on the surface of the screen and getting into the eye, resulting in damage to the eye.

[Brief description of drawings]

FIG. 1 is a perspective view of the television near-field hearing preventer of the present invention mounted on a television.

FIG. 2 is a circuit diagram showing a basic circuit configuration used in the television near-field hearing preventer of the present invention.

FIG. 3 is an explanatory diagram of the internal structure of an infrared sensor used in the near-TV hearing protector of the present invention.

[Explanation of symbols]

 A ..... TV near hearing preventive device 1 ...... Pyroelectric infrared sensor system 10a..Pyroelectric infrared sensor 10b..Chopper 10c .. ..Slit 10d ... Temperature sensor 11a ... Amplifier 11b ... Bandpass filter 11c ... Rectifier circuit 11d ... Comparator 12a .. Winding material 12b-Cap 12c-Stem 12d-Case 13a-Blackening film 13b-Sensing element 13c-Alumina substrate 13d- .... FFT 14a ... ground terminal 14b ... source terminal 14c ... drain element 15 ... relay 15a ... reset coil 15b ... ..Contact point 15c・ ・ ・ ・ Contacts 16 ・ ・ ・ ・ ・ ・ Push button switch 17 ・ ・ ・ ・ ・ ・ Power supply rectifier circuit 18 ・ ・ ・ ・ ・ ・ Switch 19 ・ ・ ・ ・ ・ ・ Outlet 20 ・ ・ ・Neon tube 21 ... Switch 22 Power plug 23 Power cord 24 Power cord 25 Television TV 25a・ Screen 26 ・ ・ ・ ・ Power plug for TV 30 ・ ・ ・ ・ ・ ・ ・ ・ R1 40 ・ ・ ・ ・ ・ ・ R2 50 ・ ・ ・ ・ ・ ・ Switching transistor

Claims (1)

[Claims] 1. A sensor which is mounted on a television and detects when it comes close to a predetermined range of a screen of the television, and a sensor which is provided between the sensor and a power source of the television and turns off the power based on the information of the sensor. A television near-field hearing preventer comprising: an automatic switching means; and a reset button which is connected to the automatic switching means and which turns on the power of the television turned off by the automatic switching means again.