KR101003071B1 - On/off control unit for outdoor led lamp by detecting extreme cold and hot temperatures - Google Patents

Abstract

PURPOSE: A method for controlling the on/off of an outdoor LED lamp is provided to prevent the components of the outdoor LED lamp by turning off the outdoor LED lamp at extremely high and low temperatures. CONSTITUTION: A power switch or sunset sensor is turned on(S1). The temperature of a printed circuit board is detected in real time(S2). The temperature of a printed circuit board is compared with the extremely high and low temperatures and a normal operation temperature(S3). If the temperature of the printed circuit board is less than the extremely low temperature or more than the extremely high temperature, the lamp is turned off(S4). An abnormal temperature state display lamp is turned on(S5). If the temperature of the printed circuit board is within the normal operation temperature, the lamp is turned on(S6).

Description

ON / OFF control unit for outdoor LED lamp by detecting extreme cold and hot temperatures}

The present invention relates to a point / light off control method of an outdoor light emitting diode luminaire through extreme and extreme high temperature detection, and more particularly, by installing a temperature detection sensor on a printed circuit board of a light emitting diode luminaire installed outdoors. If the temperature of the circuit board itself is detected to be lower than the predetermined limit temperature (eg, minus 61 ° C) or higher than the extremely high temperature (eg image 71 ° C), the lighting of the corresponding luminaire will be blocked. Turn on the temperature display lamp to indicate why the lighting equipment is not turned on.When the temperature of printed circuit board is within the normal operating temperature, the lamp is gradually turned on by pulse width modulation (PWM) control to Pulse width modulation (PWM) control if the temperature rises up to 0-100%, within a few seconds, while the detection temperature is below the normal operating temperature and higher than the extreme temperature. The lamp starts to turn on gradually and if the cumulative temperature change value is increased above the predetermined temperature (for example, 0.1-1.0 ℃ / sec) by converting the calorific value per unit time (for example, 1-2 seconds), the current at that stage To stop the increase, and if it is less than that, increase the illuminance of the lighting fixture and the temperature of the printed circuit board gradually by repeating the steps of increasing the current by a predetermined percentage to prevent the damage caused by the rapid temperature rise. In addition, it is possible to prevent the damage of the driving parts and the cracks in the soldering part of the printed circuit board, including the shortening of life, which may be caused by the lighting of the lighting equipment. Deterioration of characteristics can be prevented in advance, and when the luminaire is not turned on, the cause is reached at an extreme or extreme high temperature. It does not light up because of the sound that one would allow the invention to identify accurately and quickly, such as lighting equipment administrator.

Recently, various lighting fixtures using light emitting diodes (LEDs) with low power consumption and long lifespan have been developed and released.

As described above, light fixtures using light emitting diodes are classified into indoor lighting fixtures installed indoors and outdoor lighting fixtures installed outdoors. Among the lighting fixtures described above, various lighting fixtures, including street lamps, are presented. It is becoming.

On the other hand, the places where the outdoor lighting fixtures are installed are so diverse that the ambient temperature is different depending on latitude, altitude, season and time, and the light emitting diode also has a characteristic that is sensitive to temperature changes.

However, when the ambient temperature reaches the extreme temperature, the current does not flow well due to overcooling, and thus the driving itself does not operate normally, and when the extreme temperature is reached, the light emitting diode emits light due to overheating due to excessive electron emission. The diode itself may be damaged or broken.

Therefore, some of the light emitting diode type luminaires installed in an area where the ambient temperature can reach extreme or extreme high temperatures have reached a certain extreme or extreme high temperature (for example, -20 ° C and + 60 ° C). In some cases, a function is provided to prevent the lighting of the lighting device.

However, the light emitting diode type lighting device does not detect the temperature of the printed circuit board, but simply prevents the lighting device from lighting when the ambient temperature where the lighting device is installed is detected at a predetermined extreme or extreme high temperature. There is a fear that people or people around you may be mistaken for a failure because it is not clear whether the lighting fixture is not turned on for some reason.

In addition, although the ambient temperature is within the extreme and extreme high temperature, the maximum current can be maintained independently of the temperature difference when the LED lighting device is turned on in response to the "on" signal of the user's power switch or the output signal of the sunset detection sensor. It is configured to supply a lamp to light the lighting fixture.

However, even if the ambient temperature is above or below the extreme temperature, if the temperature is close to the extreme temperature, the temperature of the printed circuit board itself in which the light emitting diodes are soldered is very low. In this state, the power supply voltage is supplied to the light emitting diode. When the light is turned on, the temperature of the printed circuit board formed of good aluminum or the like is increased rapidly in order to radiate heat generated by the light emitting diodes smoothly, so that the thermal expansion coefficient is different from that of the printed circuit board. There is a problem in that the light fixture itself is damaged or damaged due to some cracks or shapes spaced apart from the soldering portion formed between the pattern or the pattern formed on the printed circuit board and the light emitting diode.

In addition, when the temperature is close to the extremely high temperature, the temperature of the printed circuit board itself in which the light emitting diodes are soldered is very high. In this state, when the power supply voltage is supplied to the light emitting diode, the light is emitted by the heat generated from the light emitting diodes. Since the diodes themselves are overheated, there is a problem that the light emitting diodes are damaged or broken by overheating.

The present invention has been made to solve such a conventional problem, the temperature of the printed circuit board itself is determined by installing a temperature detection sensor and an abnormal temperature display lamp on the printed circuit board of the light emitting diode lighting fixture installed outdoors When it is detected to be lower than the extreme temperature (for example, minus 61 ℃) or higher than the extreme high temperature (for example, image 71 ℃), the lighting of the corresponding luminaire is turned off and the abnormal temperature indication lamp is turned on. It indicates why the luminaire is not turned on, and when the temperature of the printed circuit board is within the normal operating temperature, the lamp is gradually turned on by pulse width modulation (PWM) control to the value of 0-100% of the total current. The rise of is reached within a few seconds, but when the detected temperature is lower than the normal operating temperature and higher than the extreme temperature, it is gradually turned on by pulse width modulation (PWM) control. If the cumulative temperature change value is increasing above the set temperature (for example, 0.1-1.0 ℃ / sec) by converting the calorific value per unit time (for example, 1-2 seconds), the current stops at that step. If it is less than that, the current is gradually increased by a predetermined percentage in order to prevent the damage caused by the rapid temperature rise, and gradually increases the illuminance of the lighting fixture and the temperature of the printed circuit board. It can prevent the damage of the driving parts and the crack of soldering part of the printed circuit board including the shortening of the life due to the thermal shock that can be caused by the lighting, and also prevent the destruction of the characteristics of the light emitting diode itself due to overheating or overcooling. It can be prevented in advance, and can also be turned on when the luminaire does not light up due to the extreme or extreme temperature reached. It is an object of the present invention to provide a point / light off control method of an outdoor light emitting diode lighting apparatus through extreme and extreme temperature detection, which can be accurately and quickly understood by a lighting fixture manager.

In order to achieve the above object, an outdoor light emitting diode lighting device using extreme temperature and extreme high temperature detection is turned off, and includes: several light emitting diodes which are installed by soldering to a printed circuit board to meet desired illuminance; A printed circuit board having the light emitting diodes and installed in a luminaire body; A temperature detection sensor detecting a temperature and transferring the temperature to a control unit; An extreme and extreme high temperature setting unit for allowing a user or an administrator to set an extreme and an extreme high temperature according to a temperature characteristic of a region where the lighting fixture is installed; A constant voltage rectifying unit configured to rectify a constant voltage to a DC voltage necessary for driving each component; When the power switch is turned "on" or when the sunset is detected by the sunset detection sensor, the input information set by the extreme and extreme high temperature setting unit and the temperature signal detected in real time by the temperature detection sensor are input and are pre-inputted in the control. A control unit which executes a program to perform an overall control function according to driving of a lighting device; A light emitting diode driving unit for controlling the driving of the light emitting diode in response to the signal output from the controller; In the point / light off control device of the outdoor light-emitting diode lighting apparatus provided with, the temperature detection sensor generates a sudden temperature change within a short time Or on a printed circuit board which directly affects the characteristics, pattern and soldering area of the light emitting diode upon detection of extreme temperature and extreme temperature. In the luminaire body, the temperature of the printed circuit board itself is higher than the predetermined temperature limit. It is characterized in that an additional temperature status indicator lamp is added to allow the user or administrator to know when the light emitting diode is not turned on by the control unit because it is detected to be lower or higher than the extremely high temperature.

In addition, the present invention for achieving the above object, a plurality of light emitting diodes, temperature detection sensor and abnormal temperature state display lamp is provided on the printed circuit board, the input and output terminals of the control unit temperature detection sensor and the extreme and extreme When the power switch is "on" in the control unit having a configuration in which a high temperature setting unit, a constant voltage rectifying unit, and a light emitting diode driving unit are connected or a sunset is detected by a sunset detection sensor, the input information set by the extreme and extreme high temperature setting units Point / Turn-out control method for outdoor light emitting diode luminaire which controls the point / light off of the lighting device in response to the temperature signal detected in real time by the temperature detection sensor, the power switch is turned on or the sunset is detected by the sunset sensor. When detected, the controller receives the temperature of the printed circuit board which is detected in real time through a temperature detection sensor. It is compared with the set temperature and the normal operating temperature by a temperature setting unit and calculating the ratio and; As a result of the comparison, when the temperature of the current printed circuit board is lower than or equal to a predetermined limit temperature or higher than an extremely high temperature, turning on the lighting device and turning on the abnormal temperature state display lamp; As a result of the comparison, when the temperature of the printed circuit board is within the normal operating temperature, the lamp is gradually turned on by the pulse width modulation (PWM) control to control the increase of the value of the total current to 0-100% within a few seconds. ; Gone what has been done.

In addition, when the comparison is judged to be lower than the normal operating temperature but higher than the extreme temperature, the step of starting from 0% through the pulse width modulation (PWM) control flows the current value according to the predetermined step to the light emitting diode and starts to turn on gradually; Converting a cumulative temperature change value of the printed circuit board into a heating value per unit time while the current value of the corresponding step is being supplied and determining whether the resultant value is increased above a predetermined temperature; As a result of the determination, if the calorific value per unit time according to the cumulative temperature change value is greater than or equal to a predetermined temperature, maintaining the current value currently increasing and returning to the previous step; Increasing one step to a unit current value of a predetermined percentage of the current supplied to the light emitting diodes in the previous step if the heat generation value converted per unit time to the cumulative temperature change value of the printed circuit board is less than the determined temperature as a result of the above determination; Incrementing the step point by one and comparing it with a final stem point value that results in a current value of up to 100%; As a result of the comparison, if the final stem point value, which is the maximum value of 100%, is not the final stem point value, the cumulative temperature change value of the printed circuit board to which the current value of the corresponding step is supplied is converted into a calorific value per unit time, and the result value is increased above the predetermined temperature. Returning to the step of determining whether it is being performed; When the current step pointer indicates the final stem point value that is the current value of the maximum 100% as a result of the comparison above; stopping the increase of the current;

At this time, the extreme temperature is set by the extreme and extreme high temperature setting unit is -61 ℃, the extreme high temperature is +71 degrees, the normal operating temperature is characterized in that between -20 ℃ to +70 ℃.

In addition, the unit time is 1-2 seconds, characterized in that the predetermined temperature compared with the calorific value per unit time is 0.1-1.0 ℃ / sec.

As described above, according to the present invention, a temperature detection sensor and an abnormal temperature state display lamp are installed on a printed circuit board of a light emitting diode luminaire installed outdoors, and the temperature of the printed circuit board itself is determined at an extreme temperature (for example, If it is detected to be lower than minus 61 ℃) or higher than extreme high temperature (for example, image 71 ℃), the lighting is turned off and the abnormal temperature indication lamp is turned on. If the temperature of the printed circuit board is within the normal operating temperature, the pulse width modulation (PWM) control starts to turn on gradually, and the increase to the value of the total current, 0-100%, is reached within a few seconds. If the detected temperature is lower than the normal operating temperature and higher than the extreme temperature, the lamp is gradually turned on by the pulse width modulation (PWM) control and the accumulated temperature is changed. If the amount of heat generated per unit time (e.g. 1-2 seconds) is increased above the specified temperature (e.g. 0.1-1.0 ° C / sec), the current stops increasing at that stage. In order to prevent the damage caused by the current, the step of increasing the current gradually increases by a predetermined percentage to gradually increase the illuminance of the lighting fixture and the temperature of the printed circuit board, which may be caused by the lighting being turned on even at the extreme or extreme temperature. It is possible to prevent the damage of the driving parts and the cracks in the soldering part of the printed circuit board including the shortening of the life due to the thermal shock. Second, it is possible to prevent the destruction of the characteristics of the light emitting diode itself due to overheating or overcooling. Thirdly, when the luminaire is not lit, it is not lit because of its extreme or extreme temperature. Now such is very useful inventions, etc. that can be accurately and quickly identify.

1 is a block diagram of the entire point / off control device of the outdoor light emitting diode lighting fixture through the detection of extreme temperature and extreme high temperature to which the method of the present invention is applied.
2 is a flowchart for explaining the method of the present invention.

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

1 is a block diagram illustrating an entire point / light off control apparatus of an outdoor light emitting diode lighting device through extreme and extreme high temperature detection to which the method of the present invention is applied.

According to this,

Several light emitting diodes 1 which are installed by soldering to the printed circuit board 2 so as to meet desired illuminance; A printed circuit board (2) having said light emitting diodes (1) and installed in a luminaire body (3); A temperature detection sensor 4 which detects a temperature and transmits the temperature to the control unit 10; Extreme and extreme temperature setting unit (5) (6) to allow the user or administrator to set the extreme and extreme high temperature in accordance with the temperature characteristics of the area where the lighting fixture is installed; A constant voltage rectifier 7 for rectifying a constant voltage to a DC voltage necessary for driving each component; When the power switch 8 is "on" or sunset is detected by the sunset detection sensor 9, the input information and the temperature detection sensor 4 set by the extreme and extreme high temperature setting units 5 and 6 are real-time. A control unit 10 for receiving a temperature signal detected by the controller and performing a control program pre-input in itself to perform an overall control function according to the driving of a lighting device; In the point / light off control device of the outdoor light emitting diode lighting device having a; LED driving unit 11 for controlling the driving of the light emitting diode 1 in response to the signal output from the control unit 10,

The temperature detection sensor 4 includes a printed circuit board 2 which directly affects the characteristics, patterns, and soldering regions of the light emitting diodes 1 when a rapid temperature change occurs within a short time or when extreme temperature and extreme temperature are detected. In the luminaire main body 3, the temperature of the printed circuit board 2 itself is lower than the predetermined limit temperature (e.g., -61 ° C) or extremely high temperature (e.g. + 71 ° C). And an abnormal temperature state display lamp 12 is installed so that a user or an administrator can know when the light emitting diode 1 is not turned on in the control unit 10 so as to be detected in a state higher than).

2 shows a flowchart for explaining the method of the present invention.

According to the present invention,

Several light emitting diodes (1), a temperature detection sensor (4) and an abnormal temperature state display lamp (12) are provided on the printed circuit board (2), and the temperature detection sensor (4) at the input and output terminals of the control unit (10). Power switch 8 is " on " or sunset in the control unit 10 having a configuration in which an extreme and extreme high temperature setting unit 5, 6, a constant voltage rectifying unit 7, and a light emitting diode driver 11 are connected. When the sunset is detected by the detection sensor 9, the temperature detected in real time by the input information T1 ° C (T2 ° C) and the temperature detection sensor 4 set by the extreme and extreme high temperature setting units 5 and 6 In the point / light off control method of the outdoor light-emitting diode lighting device to control the lighting, the lighting of the lighting fixture in response to the signal (T3 ℃),

When the power switch 8 is "on" or sunset is detected by the sunset detection sensor 9 (S1), the printed circuit board (S2) detected in real time by the temperature detection sensor 4 in the control unit 10 ( 2) The temperature (T3 ℃) is input and compared with the temperature (T1 ℃) (T2 ℃) and the normal operating temperature (T4 ℃) set by the extreme and extreme high temperature setting sections (5) (6). Calculating (S3);

As a result of the comparison, if the temperature (T3 ℃) of the current printed circuit board 2 is equal to or lower than the predetermined limit temperature (T1 ℃) or higher than the extreme high temperature (T2 ℃), the lighting of the corresponding lighting device is blocked (S4) and the abnormal temperature. Lighting the status display lamp 12 (S5);

As a result of the comparison, when the temperature of the printed circuit board 2 is within the normal operating temperature (T4 ° C.), the lamp is gradually turned on by the pulse width modulation (PWM) control to increase the value up to 0-100% of the total current. Controlling to be reached within a few seconds (S6);

In addition, as a result of the above comparison, if the temperature is lower than the normal operating temperature (T4 ° C) but higher than the extreme temperature (T1 ° C), the pulse width modulation (PWM) control starts the current value from 0% according to the predetermined step. Flowing to the step of gradually starting to turn on (S7);

While the current value of the step is being supplied, the cumulative temperature change value of the printed circuit board 2 is converted into a calorific value per unit time (t) (S8), and as a result, the value is increased above a predetermined temperature (T5 ° C / sec). Determining whether it is being made (S9);

A step (S10) of maintaining the current value currently increasing and returning to the previous step (S9) if the heat generation amount per unit time according to the accumulated temperature change value is equal to or greater than the determined temperature (T5 ° C / sec);

As a result of the above determination, if the calorific value converted per unit time for the cumulative temperature change value of the printed circuit board 2 is less than the predetermined temperature (T5 ° C./sec), the predetermined percentage of the current supplied to the light emitting diodes 1 in the previous step is determined. Increasing by one step to a unit current value (S11);

Incrementing the step point by one (S12) and comparing whether it is equal to the final stem point value which becomes a current value of up to 100% (S13);

As a result of the comparison, if the final stem point value, which is the maximum current value of 100%, the cumulative temperature change value of the printed circuit board 2 to which the current value of the corresponding step is supplied, is converted into a calorific value per unit time, and the resultant temperature is determined. Step S13 of returning to step S9 for determining whether the increase is greater than (T5 ° C / sec);

If the current step pointer indicates a final stem point value that is a current value of up to 100% as a result of the comparison, the step of stopping the increase of the current (S14); characterized in that the further implementation.

At this time, the extreme temperature (T1 ° C) set by the extreme and extreme high temperature setting unit (5) 6 is -61 ° C, the extreme high temperature (T2 ° C) is + 71 ° C, and the normal operating temperature (T4 ° C). ) Is between -20 ° C and +70 ° C.

In addition, the unit time (t) is 1-2 seconds, characterized in that the predetermined temperature (T5 ° C / sec) compared to the calorific value per unit time is 0.1-1.0 ° C / sec.

Referring to the operation and effect of the present invention made of such a configuration and steps as follows.

First, the apparatus of the present invention includes several light emitting diodes (1), a lighting device body (3), a printed circuit board (2), a temperature detection sensor (4), an extreme and extreme high temperature setting unit (5), and a constant voltage rectifying unit. (7) A point / light-out control apparatus for a known outdoor light emitting diode lighting device having a power switch 8 or a sunset sensor 9, a control unit 10 and a light emitting diode driving unit 11, wherein the temperature detection is performed. The sensor 4 is installed on the printed circuit board 2, and an additional temperature state display lamp 12 is additionally installed in the luminaire main body 3 as a main technical component.

That is, in the device of the present invention, the temperature detection sensor 4 itself is directly installed on the printed circuit board 2 so that a sudden temperature change occurs within a short time or the characteristics of the light emitting diode 1 are detected in the detection of extreme and extreme temperatures. And a temperature directly affecting the pattern formed on the printed circuit board 2 and the soldered portion of the pattern can be directly detected on the printed circuit board 2, and in the luminaire main body 3, an abnormal temperature state The display lamp 12 is additionally installed so that the temperature of the printed circuit board 2 itself is lower than a predetermined limit temperature (eg, -61 ° C) or higher than an extremely high temperature (eg, + 71 ° C). When the control unit 10 prevents the light emitting diodes 1 from turning on, the user or the manager knows exactly why the light emitting diodes 1 are not turned on.

Meanwhile, in the method of the present invention, as described above, the light emitting diode 1, the temperature detection sensor 4, and the abnormal temperature state display lamp 12 are provided on the printed circuit board 2, and the input of the control unit 10 is performed. In the output terminal, a power switch in the control unit 10 having a configuration in which a temperature detecting sensor 4 and an extreme and extreme high temperature setting unit 5, 6, a constant voltage rectifying unit 7, and a light emitting diode driver 11 are connected. When (8) is detected to be "on" or sunset is detected by the sunset detection sensor (9) (S1), the real-time detection of the printed circuit board (2) by the temperature detection sensor (4) The temperature (T3 ° C) is input and compared with the temperature (T1 ° C) (T2 ° C) and normal operating temperature (T4 ° C) set by the extreme and extreme high temperature setting sections (5) and (6) as well as the ratio thereof. It is calculated (S3).

At this time, in the present invention, in consideration of the characteristics of the light emitting diode, the extreme temperature (T1 ° C) set by the extreme and extreme high temperature setting sections 5 and 6 is set to -61 ° C, and the extreme high temperature (T2 ° C). ) Was set to +71 degrees, and the normal operating temperature (T4 ℃) was set between -20 ℃ to +70 ℃.

As such, the extreme temperature (T1 ° C.), the extreme temperature (T2 ° C.), and the normal operating temperature (T 4 ° C.) compared to the current temperature (T 3 ° C.) of the printed circuit board 2 detected in real time by the temperature detection sensor 4. When the current temperature (T3 ° C) of the printed circuit board 2 is equal to or less than -61 ° C which is a predetermined limit temperature (T1 ° C) or more than + 71 ° C which is an extreme high temperature (T2 ° C), the light emitting diode 1 In order to protect against extreme or extreme temperature (protection against extremes, overcooling and overheating), the lighting of the lighting device is blocked (S4) and the abnormal temperature state display lamp 12 additionally installed in the present invention is turned on (S5). ).

Therefore, when the lighting device is not turned on, the lighting device user or the manager can accurately and quickly determine that the cause is not caused by the failure of the lighting device and is not turned on due to reaching an extreme or extreme high temperature.

In addition, the control unit 10 has an extreme temperature (T1 ℃) and extreme temperature (T2 ℃) compared to the current temperature (T3 ℃) of the printed circuit board 2 is detected in real time through the temperature detection sensor 4 as described above And when the normal operating temperature (T4 ° C.) is compared with each other, a pulse width if the present temperature of the printed circuit board 2 is any one of a temperature between −20 ° C. and + 70 ° C., which is the normal operating temperature (T 4 ° C.). Modulation (PWM) control starts to light up the LED slowly, that is, starts from 0% current to 100% of the total current and gradually increases the current until it reaches the desired illuminance within a few seconds. S6).

However, as a result of the above comparison, if the temperature is lower than the normal operating temperature (T4 ° C) but higher than the extreme temperature (T1 ° C) (that is, any temperature between -60 ° C and -21 ° C), the control unit 10 modulates the pulse width. (PWM) The control method starts from 0% current and flows a current value according to a predetermined step to the light emitting diode 1 to start lighting gradually (S7).

Subsequently, the cumulative temperature change value of the printed circuit board 2 to which the current value of the corresponding step is supplied is converted into a calorific value per unit time (t; for example, 1-2) (S8). (T5 ° C / sec; for example, it is determined whether the temperature is set to a value of 0.1-1.0 ° C / sec by the user) or more (S9).

As a result of the above determination, if the calorific value per unit time (t) according to the cumulative temperature change value is higher than or equal to the predetermined temperature (T5 ° C / sec), the current value that is increasing is kept as it is to prevent the damage caused by the continuous rapid temperature rise. The process returns to the previous step S9 (S10).

That is, the calorific value per unit time (t; i.e. 1-2 seconds) according to the cumulative temperature change value due to the heat generated from the light emitting diodes 1 operated by the current supplied from the current stem, for example, If the temperature is set at 0.1-1.0 ° C / sec, which is (T5 ° C / sec), for example, 0.5 ° C / sec, the temperature of any one of -60 ° C to -21 ° C may be exceeded when 0.5 ° C / sec is exceeded for 1-2 seconds. The temperature of the printed circuit board 2 is regarded as rapidly rising and the current value that is increasing is maintained to prevent the damage caused by the rapid increase in temperature. Since the temperature of the light emitting diodes 1 including) increases, it is possible to prevent the destruction of characteristics of the light emitting diodes 1 itself, which may be generated.

On the other hand, as a result of the above determination, if the calorific value converted per unit time for the cumulative temperature change value of the printed circuit board 2 is less than the predetermined temperature (T5 ℃ / sec), it is recognized that the temperature of the printed circuit board 2 is gradually rising Then, increase the step by one step (S11) to a predetermined% unit current value compared to the current supplied to the light emitting diodes (1) in the previous step, and then increase the previous step point value by one (S12) and the current value of the maximum 100% is increased. It is compared whether or not the same as the final stem point value (S13)

For example, assuming a 5% increase in current for each step, the total step needed to increase the current value from 0% to 100% is 20.

As a result of the comparison, if the final stem point value, which is the maximum current value of 100%, the cumulative temperature change value of the printed circuit board 2 to which the current value of the corresponding step is supplied, is converted into a calorific value per unit time, and the resultant temperature is determined. Returning to step S9 of determining whether the increase is greater than (T5 ° C./sec), the subsequent operation is repeatedly performed. As a result of repeating the above steps, the final stem whose current step pointer is a current value of 100% at maximum. Indicating the point value stops the increase of the current (S14).

As described above, when the temperature of the printed circuit board 2 itself is detected to be lower than a predetermined limit temperature (eg, minus 61 ° C.) or higher than an extremely high temperature (eg image 71 ° C.), the corresponding illumination is applied. It not only blocks the lighting of the instrument but also lights up the abnormal temperature condition display lamp 12 to indicate why the lighting apparatus is not turned on. In addition, when the temperature of the printed circuit board is within the normal operating temperature, the pulse width modulation (PWM) ) The lamp starts to turn on gradually to reach 0-100% of the total current within a few seconds.If the detected temperature is lower than the normal operating temperature and higher than the extreme temperature, the pulse width modulation (PWM) control If the cumulative temperature change value is increasing above the set temperature (eg 0.1-1.0 ℃ / sec) by converting the calorific value per unit time (eg 1-2 seconds), To stop the increase of the flow rate, and if it is less than that, increase the illuminance of the lighting fixture and the temperature of the printed circuit board gradually by repeating the steps of increasing the current by a predetermined percentage to prevent the damage caused by the rapid temperature rise. In the figure, it is possible to prevent the damage of the driving parts and the cracks in the soldering part of the printed circuit board including the shortening of the life due to the thermal shock which may be generated due to the lighting fixture being turned on, and the overheating or overcooling of the LED It is possible to prevent the destruction of characteristics in advance, and it is possible for the lighting fixture manager and the like to accurately and quickly determine that the lighting is not turned on due to the extreme or extremely high temperature when the lighting fixture does not turn on. .

It should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

1: light emitting diode 2: printed circuit board
3: light fixture body 4: temperature detection sensor
5,6: Extreme and extreme high temperature setting unit 7: Constant voltage rectifier
8: power switch 9: sunset detection sensor
10 control unit 11: light emitting diode driving unit
12: Abnormal temperature display lamp

Claims (5)

delete Several light emitting diodes, temperature detection sensor, and abnormal temperature status indicator lamp are provided on the printed circuit board, and the input and output terminals of the control unit are connected with temperature detection sensor, extreme and extreme temperature setting unit, constant voltage rectifying unit, and light emitting diode driving unit. When the power switch is turned "on" or the sunset is detected by the sunset sensor in the control unit having the configuration, the lighting is performed in response to the input information set by the extreme and extreme high temperature setting units and the temperature signal detected in real time by the temperature detection sensor. In the point / light off control method of an outdoor light-emitting diode lighting device for controlling the light off,
When the power switch is turned "on" or sunset is detected by the sunset detection sensor, the control unit receives the temperature of the printed circuit board detected in real time through the temperature detection sensor, and the temperature and normal operation set by the extreme and extreme high temperature setting units. Comparing with temperature and calculating the ratio;
As a result of the comparison, when the temperature of the current printed circuit board is lower than or equal to a predetermined limit temperature or higher than an extremely high temperature, turning on the lighting device and turning on the abnormal temperature state display lamp;
As a result of the comparison, when the temperature of the printed circuit board is within the normal operating temperature, the lamp is gradually turned on by the pulse width modulation (PWM) control to control the increase of the value of the total current to 0-100% within a few seconds. Wow;
Comparing and determining that the temperature is lower than the normal operating temperature but higher than the extreme temperature, starting from 0% through a pulse width modulation (PWM) control and gradually starting to turn on the LED by flowing a current value according to a predetermined step;
Converting a cumulative temperature change value of the printed circuit board into a heating value per unit time while the current value of the corresponding step is being supplied and determining whether the resultant value is increased above a predetermined temperature;
As a result of the determination, if the calorific value per unit time according to the cumulative temperature change value is greater than or equal to a predetermined temperature, maintaining the current value currently increasing and returning to the previous step;
Increasing one step to a unit current value of a predetermined percentage of the current supplied to the light emitting diodes in the previous step if the heat generation value converted per unit time to the cumulative temperature change value of the printed circuit board is less than the determined temperature as a result of the above determination;
Incrementing the step point by one and comparing it with a final stem point value that results in a current value of up to 100%;
As a result of the comparison, if the final stem point value, which is the maximum value of 100%, is not the final stem point value, the cumulative temperature change value of the printed circuit board to which the current value of the corresponding step is supplied is converted into a calorific value per unit time, and the result value is increased above the predetermined temperature. Returning to the step of determining whether it is being performed;
Comparing the above to stop the increase of the current when the current step pointer indicates a final stem point value that is a current value of up to 100%; further comprising the step of performing an outdoor light emitting diode luminaire Point / light off control method.
delete delete The method according to claim 2,
The unit time is 1-2 seconds, the predetermined temperature compared to the calorific value per unit time is a point / light off control method of the outdoor light emitting diode luminaire through the detection of extreme temperature and extreme high temperature, characterized in that 0.1.

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