KR20000027979A - Television having fire detecting apparatus - Google Patents

Abstract

PURPOSE: A television having a fire detecting apparatus is provided to prevent an electric appliance from being degraded and/or prevent a danger of a fire generation before it happens. CONSTITUTION: A television having a fire detecting apparatus includes a detecting part(20)and a part(21) controlling a power supply. The detecting part is attached on the side of a CRT and detects an abnormal state like as a high temperature or a fire generation and inputs the detected state signal to a micro-computer(14). The part(21) controlling a power supply controls the power supply with an on/off method according to a control signal outputted from the micro-computer after judging a state according to a state signal being inputted from the detecting part. The power supply is temporarily off when an overheat state of the inside of the main body is detected by the detecting part.

Description

TV with fire detector

The present invention relates to a television having a fire detection device for preventing overheating and fire, and more particularly, by detecting the temperature change or ignition state of the surroundings of the CRT where a high temperature is generated, and by shutting off the power when necessary The present invention relates to a television having a fire detection device capable of detecting the risk of occurrence.

Televisions are very durable electronics, but because they are not cleaned very often, dust builds up inside the television body, which increases the temperature inside the body. The rise in temperature caused by dust adversely affects the television's CRT and other electrical equipment, thereby accelerating deterioration.

In particular, since the power is often turned on for a long time even when the television is not watched, there is a risk of fire caused by not only deterioration of the television but also a high temperature. Particularly high temperature generation components in televisions are CRTs powered by FBT.

First, the structure and operating state of a conventional television will be described with reference to FIG.

As shown, the general configuration of a television includes an antenna (1), a tuner (2), an IF amplifier (3), a P / S separation unit (4), a voice detector (5), a voice processor (6), The audio amplifier 7, the speaker 8, the OSD generator 15, the image detector 9, the image processor 10 and the mixer 11, and a memory device (E ² PROM) for storing data are provided. It is composed of a microcomputer 14 to be connected, a CRT driver 12, a CRT (13).

In addition, the operating state of the television is as follows. The broadcast signal of the airwave is received by the antenna 1, and the broadcast signal received by the tuner 2 controlled by the microcomputer 14 is tuned. The IF amplifier 3 amplifies an intermediate frequency (IF) signal output from the tuner 2, and the P / S separation unit 4 includes a surface acoustic wave filter to convert the intermediate frequency (IF) into an image intermediate frequency ( PIF) and voice intermediate frequency (SIF).

The voice detector 5 detects a voice signal from the voice intermediate frequency (SIF), and the voice processor 6 detects the detected voice signal based on the control signal of the microcomputer 14 (Base) and Treble. Voice processing such as volume and the like is performed, and the voice amplifier 7 amplifies the processed voice signal and outputs it to the speaker 8.

On the other hand, the image intermediate frequency (PIF) is detected by the image signal from the image detector 9, the image signal detected by the image processing unit 10 according to the control signal of the microcomputer 14, color, tint, brightness, etc. R (Red), G (Green), B (Blue), and luminance (Y) signals corresponding to the video signals are output, and the R, G, B, and luminance (Y) signals are output from the mixer (11). By mixing and outputting the R ', G', B 'and OSD blanking signals Y' generated from the OSD generator 15, the CRT 17 is driven through the CRT driver 12, and the OSD generator 15 The image is displayed together with the predetermined OSD pattern data.

In addition, although not shown, the remote control device is a device for viewers to control output volume, channel switching, or remotely control other devices. By outputting to 14), the entire apparatus is controlled by the microcomputer 14 in accordance with the electrical code signal.

However, in order to drive the CRT 13 as described above, a high-voltage power source must be applied, and when the television is driven for a long time in a state where a lot of heat is generated, the temperature inside the television body rises to promote deterioration of electrical equipment. In particular, it is difficult to discharge heat in a state in which a lot of dust is accumulated inside the main body, so that the temperature inside the main body rises and there is a risk of fire.

The present invention has been made to solve the above problems, the object of the present invention is to prevent the deterioration of the electrical equipment by cutting off the power if necessary by sensing the temperature overheating state, or ignition state of the surroundings of the CRT high temperature is generated And / or to provide a television with a fire detection device capable of catching the risk of fire.

1 is a block diagram showing an example of a circuit configuration of a conventional TV receiver;

2 is a configuration example of a fire detection apparatus according to the present invention,

Figure 3 is a side view showing the installation state of the detection unit of the fire detection apparatus of the present invention,

4A is a flowchart illustrating an operating state when a temperature sensor is used in a detector;

4B is a flowchart showing an operating state when the light sensing sensor is used in the sensing unit.

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

1: Anna 2: Tuner 3: IF amplifier,

4: P / S separator 5: voice detector 6: voice processor

7: audio amplifier 8: speaker 9: video detector

10: image processing unit 11: mixer 12: CRT drive unit

13: CRT 14: Micom 15: OSD Generator

16: TV case 20,20 ': Detection part 21: Power control part

The present invention for the above object is to provide a visual output of the image, the CRT having a high voltage is applied to generate a high temperature and a television with a microcomputer 14 for controlling the operating state of the television, the CRT It is attached to the side of the high temperature, or detect an abnormal state, such as a fire occurrence, the detection unit 20 for inputting the detected state signal to the microcomputer 14, and the state signal input from the detection unit 20 And a power supply control unit 21 for controlling the power on / off according to the control signal output from the microcomputer 14 after determining the state.

Hereinafter, a television having a fire detection apparatus of the present invention will be described with reference to the accompanying drawings.

The present invention is to increase the internal temperature of the television to promote the deterioration of the electrical equipment and to prevent the occurrence of fire in severe cases, it is possible to detect the temperature change or ignition state around the CRT where the high temperature heat is mainly generated By installing the detector and shutting off the power in the event of an abnormal condition, it is possible to effectively prevent fire and electrical equipment deterioration.

According to the present invention, the detection unit 20 and the power supply control unit 21 are further provided in the conventional television. 2 is a schematic diagram showing the connection state of the sensing unit 20, the power supply control unit 21, and the microcomputer 14, which is the main control unit of the television.

As shown, the sensing unit 20 is connected to the microcomputer 14 (a microcomputer used as a control unit of the TV) and detects a change in temperature of the surroundings and serves to input the microcomputer 14. For this purpose, the sensing unit 20 may be configured using a temperature sensor such as a thermistor or a thermostat in which a current value or a voltage value is changed according to a change in temperature.

The electrical signal according to the temperature change output from the sensing unit 20 is input to the microcomputer 14. In the microcomputer 14, the limit current value according to the temperature change is set in advance, and the microcomputer 14 detects the occurrence of an abnormal state by comparing the input current value with the limit current value. It is apparent to those skilled in the art that the present invention can be configured to detect overheating or fire occurrence according to a specific purpose.

The control signal according to the comparison result is output from the microcomputer 14, and the power supply control unit 21 controls the on / off of the power supply in accordance with this control signal. The power control unit 21 can be configured to cut off the middle of the line (supply wire) in order to directly cut off the commercial AC power supplied to the television, it can be easily configured using a relay for high voltage. The relay is directly controlled by the control signal of the microcomputer 14. When the control signal for turning off the power is input, the relay is activated and power applied to the CRT and the PCB is cut off accordingly. Power off can optionally be performed.

3 is a side sectional view of a television showing the installation position of the sensing unit 20 of the present invention. As shown, it can be seen that the sensing unit 20 is in close contact with the lower surface of the CRT 13. This is suitable for the case of using a temperature detection sensor that can measure the temperature change in the sensing unit 20 has the effect of quickly detecting the overheating state and prevent the fire in advance. In addition, the detection unit 20 'of the portion indicated by the dotted line indicates a suitable installation position for detecting the ignition flame voltage in the event of a fire.

4A is a flowchart showing possible operating states when a temperature sensor is used. When the operation is started, the detector 20 continuously measures the internal temperature of the television main body, particularly the external surface temperature of the CRT 13, and converts the temperature value into a current value (or voltage value) corresponding thereto and outputs it.

The output current value is input to the microcomputer 14. The microcomputer 14 previously stores a limit current value therein and detects a temperature change by comparing with the limit current value. The limit current value is a current conversion value for a temperature that is generally assumed to have entered an overheat state, and can be set to an overheat state if less than the limit current value and to an operating state if less.

That is, when the input current value is smaller than the limit current value stored in the memory device of the microcomputer 14, the microcomputer 14 detects the normal operating state and does not output a signal to the power control unit 21. Thus the TV stays on.

However, as a result of comparison, when the input current value is larger than the limit current value, the microcomputer 14 determines that it is in an overheated state and outputs a signal for stopping the operation of the television. The power control unit 21 is operated to cut off commercial power AC when the off operation signal is input from the microcomputer 14. Therefore, the power applied to the CRT 13 is cut off to prevent overheating. At this time, the power applied to the PCB for the operation of the fire detection apparatus of the present invention continues to supply. In addition, the off state of the power supply control unit 21 is stored in the microcomputer 14. Instead of cutting off the power of the CRT 13, it is also possible to cut off the power by connecting to the main switch of the television.

When the power is cut off as described above and the overheating state no longer progresses, the microcomputer 14 measures the internal temperature of the television through the sensing unit 20 again. The measured temperature value is converted into a current value as described above and compared again in the microcomputer 14. As a result of the comparison, if the current value is larger than the threshold current value, the overheated state is not yet resolved, and thus the microcomputer 14 maintains the power off state.

However, if the current value is less than the threshold current value, the overheating condition is eliminated, and thus the microcomputer 14 detects the current state of the power control unit 21. Since this state is already stored in the microcomputer 14, the state is maintained when the power is turned on by the power controller 21, and when the power is off, the control signal is output to the power controller 21 to reapply the power. do. Therefore, the video screen is output to the television again. The microcomputer 14 stores the power-on state in the internal memory again and continuously detects the temperature change state through the detector 20 to prevent the overheating state.

Unlike the above, the use example using the light sensor is further disclosed.

The sensing unit 20 ′ indicated by a dotted line in FIG. 3 is another example of the temperature sensor, and is suitable when a light sensor is used. In this case, the temperature change is not detected, and the flame (ignition state at the point of ignition due to overheating) generated in the CRT 13 or its periphery is detected to detect an abnormal state. The signal output from the sensing unit 20 'is also modulated into a current value (or voltage value) and input to the microcomputer 14.

4B is a flowchart showing possible operating states in the case of using a light sensing sensor. As shown, it detects the internal light condition of the initial television. Therefore, in normal operation, when the dark state persists and the ignition occurs inside, sparks are generated and thus infrared rays are generated. The light sensor detects this infrared light and generates a corresponding current value.

The current value is also compared with the limit current value stored in the microcomputer 14. That is, the limit current value is set to the photocurrent value at the time of spark generation, and when the input current value is larger than the limit current value, it is judged as the ignition state and when it is less, the normal state.

If the input current value is smaller than the limit current value stored in the memory device of the microcomputer 14, the microcomputer 14 detects the normal operating state and does not output a signal to the power control unit 21. Thus the TV stays on.

However, as a result of comparison, when the input current value is larger than the threshold current value, the microcomputer 14 determines that the state is in ignition state and outputs a signal for stopping the operation of the television. The power control unit 21 is operated to cut off commercial power AC when the off operation signal is input from the microcomputer 14. Therefore, the power applied to the CRT 13 is cut off to prevent overheating. At this time, the power applied to the PCB for the operation of the fire detection apparatus of the present invention continues to supply. However, when the ignition occurs, it is not preferable to reapply the power, and thus, the power is kept off until the troubleshooting is finished.

As described above, according to the present invention, a detection unit capable of detecting a temperature change or ignition state is installed around the CRT where high temperature heat is mainly generated, and the power is cut off when an abnormal state occurs to effectively prevent fire and electrical appliance deterioration. There is an advantage to that.

While the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited thereto, and the present invention may be variously modified and changed without departing from the spirit or the field of the present invention. It will be readily apparent to those of ordinary skill in the art.

Claims (2)

In a television having a CRT (13) for visually outputting an image and a high temperature is applied to generate a high temperature, and a microcomputer (14) for controlling an operating state of the television, A detection unit 20 attached to the side of the CRT to detect an abnormal state such as a high temperature or a fire, and input the detected state signal to the microcomputer 14; After determining the state in accordance with the state signal input from the detection unit 20 and the power control unit 21 for controlling the power on / off in accordance with the control signal output from the microcomputer 14, When the overheating state inside the main body is detected through the detecting unit 20, the power supply is temporarily turned off to prevent overheating and / or fire. The television set with a fire detection apparatus according to claim 1, wherein the detection unit (20) is a temperature sensor or an optical sensor.