TW201823635A - Automatic control system for led module - Google Patents

Abstract

An automatic control system for a LED module is disclosed and comprises at least one LED unit, at least one fan, at least one light detector and a control device. The LED unit has a plurality of LED chips. The fan is positioned a side opposite to the LED unit for dissipating heat from the LED unit. The light detector is positioned a side adjacent to the LED unit for detecting brightness of the LED unit to generate a light detecting signal. The control device includes a micro-processor, a power management controller and an interface circuit. The micro-processor, the power management controller and the interface circuit are electrically connected with the fan, the light detector and the micro-processor respectively. The power management controller is electrical ly connected with the micro-processor, the LED unit and the fan. According to the light detecting signal, the micro-processor generates a control signal, and the power management controller can control and adjust the brightness of the LED unit based on the received control signal. Therefore, the automatic control system in the present invention can effectively achieve the uniform brightness effect.

Description

Automatic control system of LED module

The invention relates to an automatic control system of an LED module, in particular to an automatic control system of an LED module which has the effects of achieving uniform heat dissipation and brightness.

In recent years, with the rapid development of the emerging lighting industry of Light-emitting diodes (hereinafter referred to as LEDs), LEDs have exceeded or approached the energy saving of traditional light bulbs in terms of brightness, power, life, power consumption, and response rate. Light sources, so that LEDs have gradually begun to replace traditional light bulbs. For example, LEDs have been widely used in lamps, landscapes, kanbans, and indoor lighting. Among them, LED lamps are used as an example. When LED lamps are in operation, a plurality of LED units will generate extremely high heat to accumulate in the LED lamps, causing these LED units to fall into an unstable state, such as reducing the brightness of the LED units. And the phenomenon of shortened service life occurs, so how to quickly dissipate the heat generated by the LED unit has become an important issue. The most common cooling method for general LED lamps is to install multiple cooling fins on the back of each LED unit to dissipate the heat. However, the cooling fins alone are still limited, so a fan is installed on the cooling fins. To force cooling. However, although the conventional LED lamps can achieve heat dissipation, the heat dissipation effect is obviously inadequate, and each LED unit cannot achieve the purpose of uniform heat dissipation, that is, the LED lamps are easily affected by the temperature, humidity and the LED units of the environment. The amount of heat generated causes the difference in heat conduction and convection in the LED lamp, causing a large difference in the operating temperature of each LED unit (that is, each LED unit cannot be maintained at the same operating temperature), thereby shortening the life of some LED units, and As a result, the brightness and attenuation of each LED unit are different. As mentioned above, the conventional technology has the following disadvantages: 1. The brightness cannot be uniform; 2. The heat dissipation cannot be uniform; 3. The life is shortened; 4. Each LED unit cannot be maintained at the same operating temperature and attenuation. Therefore, how to solve the above-mentioned problems and shortcomings of the custom, that is, where the inventor of this case and the relevant manufacturers engaged in this industry are eager to study and improve.

Therefore, in order to effectively solve the above problems, an object of the present invention is to provide an automatic control system with an LED module that achieves uniform brightness. Another object of the present invention is to provide an automatic control system with an LED module that achieves uniform heat dissipation. Another object of the present invention is to provide an automatic control system having an LED module that enables each LED unit to maintain the same operating temperature. To achieve the above object, the present invention provides an automatic control system for an LED module, which includes: at least one LED unit has a plurality of LED chips; at least one fan is disposed on a side corresponding to the LED unit to dissipate the LED unit ; At least one light sensor is arranged on one side of the adjacent LED unit, for detecting the brightness of the LED unit to generate a light sensing signal; and a control device includes: an interface circuit is electrically connected to a fan and A light sensor; a microprocessor is electrically connected to the interface circuit, and a control signal is generated according to the light sensing signal; and a power management controller is electrically connected to the microprocessor, the fan and the LED unit, respectively, and the The power management controller controls and adjusts the brightness corresponding to the LED unit according to the received control signal. Therefore, the integrated design of the LED unit, the fan, the light sensor and the control device of the present invention can effectively achieve the effect of uniform brightness. By. In one implementation, the LED units constitute an LED module. In one implementation, the LED module is mounted on a light-emitting device. In an implementation, the microprocessor obtains the brightness of the LED unit according to the light sensing signal, and compares the brightness of the LED unit with a set brightness value therein. If the brightness of the LED unit is lower than the set brightness Value, a first warning signal is immediately sent to a connected terminal device. In an implementation, the automatic control system further includes at least one temperature sensor disposed adjacent to the fan, and is electrically connected to the interface circuit, and will detect the temperature of the external environment and the temperature around each fan to generate a Temperature sensing signal. In one implementation, the microprocessor performs calculations based on the temperature sensing signal transmitted by the interface circuit to generate a driving signal to control the fan speed. In one implementation, the microprocessor learns the temperature of each part according to the temperature sensing signal, and compares the temperature of each part with a set temperature in it. If the temperature of the certain part exceeds the set temperature, it sends a first Two warning signals to a connected terminal device.

The above object of the present invention and its structural and functional characteristics will be described based on the embodiments of the drawings. Please refer to the first and second diagrams. The present invention is an automatic control system for an LED module. In the first embodiment of the present invention, the automatic control system includes at least one LED (Light Emitting Diode) unit 10, at least one The fan 20, at least one light sensor 41, and a control device 3. The foregoing LED unit 10 is shown as a plurality of LED units 10 in this embodiment, and each LED unit has a plurality of LED chips. The LED units 10 constitute an LED module. Group 1. The LED module 1 is installed on a light-emitting device 5. The light-emitting device 5 is, for example, an LED kanban or an LED lamp. The light-emitting device 5 of the present embodiment refers to an LED lamp, but it is not limited. Here, He Xianchen. The foregoing fans 20 are shown as a plurality of fans 20 in this embodiment, and each fan 20 is disposed on a side corresponding to each LED unit 10 for forcibly dissipating heat from each LED unit 10, so when the control device 3 is in operation At this time, a driving signal (such as a PWM signal) is generated to the fan 20 to drive the fan 20 to run. The light sensor 41 in this embodiment indicates that a plurality of light sensors 41 are disposed on a side adjacent to each of the LED units 10, and the light sensors 41 are matched to the corresponding LED units 10. The detector 41 is used to detect the brightness of the LED unit 10 to generate a light-sensing signal, and send it to the control device 3. In addition, referring to FIG. 2 for specific implementation, the user may install the fan 20 together with the light sensor 41 and the LED unit 10 on the light-emitting device 5 in accordance with the internal space and appearance design requirements of the light-emitting device 5. , That is, one side of each LED unit 10 in the light emitting device 5 corresponds to each fan 20, and each of the light sensors 41 corresponds to each of the LED units 10 adjacently. The aforementioned control device 3 includes an interface circuit 30 (Interface circuit), a microprocessor 31 (MCU), and a power management controller 32. The interface circuit 30 is electrically connected to the fans 20 and the light sensors respectively. Device 41 and the microprocessor 31, and the interface circuit 30 is a medium for the microprocessor 31, the light sensor 41, and the fan 20 to convert and transmit signals to each other. For example, the signal of the light sensor 41 is an analog signal. The interface circuit 30 is converted into a digital signal that can be operated by the microprocessor 31. The aforementioned microprocessor 31 generates a control signal according to each light sensing signal, and transmits the control signal to the power management controller 32. That is, the microprocessor 31 receives the light transmitted by each light sensor 41 through the interface circuit 30. A sensing signal to know the brightness of each LED unit 10, and at the same time, the control signal is generated after calculating the received light sensing signal, and the control signal is transmitted to the power management controller 32, so that the power management controller 32 is based on The received control signal adjusts and controls the brightness corresponding to the LED unit 10, so that each LED unit 10 can maintain the same brightness effectively, thereby effectively achieving the effect of uniform brightness. The power management controller 32 is electrically connected to the microprocessor 31, the fans 20, the LED units 10, and an input power, respectively, and the power management controller 32 is used to supply power to each fan 20 and Outside of each LED unit 10, the voltage or switching frequency output to the LED unit 10 can be controlled and adjusted according to the received control signal to adjust the brightness of the LED unit 10. Continuing to refer to the second figure, the microprocessor 31 has a warning function, that is, the microprocessor 31 learns the brightness of each LED unit 10 according to the light sensing signal, and compares the brightness of each LED unit 10 with its A set brightness value is compared. If the brightness of a certain LED unit 10 (for example, 150 lumens) is lower than the set brightness value (for example, 200 lumens), a first warning is sent immediately. The signal to a connected terminal device 6 enables the terminal device 6 to learn from the first warning signal received that an abnormality (such as damage) occurs to the LED unit 10 somewhere in order to perform maintenance immediately. Therefore, with the integrated design of the LED unit 10, the fan 20, the light sensor 41 and the control device 3 of the present invention, each LED unit 10 can be effectively controlled to maintain the same brightness, thereby effectively enabling the LED module 1 Those who achieve uniform brightness. Referring to the third and fourth illustrations, this is a second embodiment of the present invention. This embodiment is substantially the same as the first embodiment described above, and the same points are not repeated. The difference in the second embodiment is that the automatic control system is more It includes at least one temperature sensor 42. The temperature sensor 42 is shown in this embodiment as a plurality of temperature sensors 42 which are disposed adjacent to each fan 20 and are electrically connected to the interface circuit 30. The temperature sensors 42 are matched to correspond to the fans 20, and each of the temperature sensors 42 is used to detect the external ambient temperature and correspond to the temperature of the surrounding environment of each fan 20 to generate a temperature sensing signal and send it to该 控制 装置 3。 The control device 3. Referring to FIG. 4, during implementation, a user may install the fan 20 together with the aforementioned light sensor 41, temperature sensor 42 and LED unit 10 in accordance with the requirements of the internal space and appearance design of the light emitting device 5. In the device 5, that is, one side of each LED unit 10 in the light-emitting device 5 corresponds to each fan 20, and each of the light sensors 41 corresponds to each of the LED units 10 adjacently, and the each The temperature sensors 42 correspond to each fan 20 adjacently. In addition, the aforementioned microprocessor 31 performs operations according to the light sensing signal and the temperature sensing signal transmitted by the interface circuit 30 to generate the aforementioned control signal and a driving signal, respectively. The driving signal is implemented as a PWM signal in a feasible manner. The processor 31 generates the driving signal according to the temperature sensing signal, and adjusts the pulse width value of the driving signal, thereby adjusting the rotation speed of the corresponding fan 20. Specifically, the microprocessor 31 receives the light sensing signal transmitted by each of the light sensors 41 and the temperature sensing signal transmitted by each of the temperature sensors 42 through the interface circuit 30, and The measurement signal is known to correspond to the brightness of each LED unit 10, and the control signal is generated after the light sensing signal is calculated, and is transmitted to the power management controller 32, so that the power management controller 32 adjusts the control according to the received control signal Corresponds to the brightness of the LED unit 10. Then, the microprocessor 31 learns the temperature of each part from each of the foregoing temperature sensing signals (that is, the aforementioned external ambient temperature and the temperature of the surrounding environment of each fan 20), and simultaneously processes the received temperature sensing signals. After the calculation, the driving signal is generated, and then the driving signal is transmitted to the fan 20 through the interface circuit 30 to control the rotation speed of each fan 20, and then the air volume discharged from each fan 20 to each LED unit 10 is appropriately adjusted and controlled. So that on the one hand, each LED unit 10 can be maintained at the same operating temperature and approximately the same attenuation, and then the effect of uniform heat dissipation is effectively achieved; on the other hand, each LED unit 10 is effectively maintained at the same brightness, Then effectively achieve the effect of uniform brightness. Furthermore, referring to the fourth figure, the microprocessor 31 has a warning function. The warning function has the following two situations: The first situation is that the microprocessor 31 learns each of the light sensing signals according to each light sensing signal. The brightness of an LED unit 10 is compared with the brightness of each LED unit 10 and the set brightness value therein. If the brightness of a certain LED unit 10 (such as 300 lumens) is lower than the set brightness value (such as 400 Light (lumens), then immediately send the aforementioned first warning signal to the connected terminal device 6, so that the terminal device 6 learns from the first warning signal received that the LED unit 10 is abnormal (such as damaged) somewhere so that Immediately perform maintenance. The second case is that the microprocessor 31 learns the temperature of each part according to each temperature sensing signal, and compares the temperature of each part with a set temperature (for example, the set temperature is 70 degrees). Yes, if the temperature of a part (for example, 100 degrees) exceeds the set temperature, a second warning signal is sent to the connected terminal device 6 so that the terminal device 6 learns that the temperature of the part is abnormal from the received second warning signal. , And then we know that this part The fan 20 may be damaged for immediate repair. As mentioned above, the LED unit 10, the fan 20, the light sensor 41, the temperature sensor 42, and the control device 3 of the present invention are integrated into a design, so that not only It can control each LED unit 10 to maintain the same working temperature and maintain approximately the same amount of attenuation with an appropriate air volume, and can also control each LED unit 10 to maintain the same brightness, thereby effectively enabling the LED module 1 to dissipate heat. Those with uniform brightness. In summary, the present invention has the following advantages over the conventional ones: 1. It has the effect of achieving uniform brightness; 2. It has the effect of achieving uniform heat dissipation; 3. It keeps each LED unit the same 4. The brightness of each LED unit can be maintained at the same working temperature and approximately the same attenuation. However, the above is only a feasible embodiment of the present invention, and any method, shape, Changes in structure and device should be included in the scope of rights in this case.

1‧‧‧LED Module

10‧‧‧LED unit

20‧‧‧fan

3‧‧‧control device

30‧‧‧Interface circuit

31‧‧‧Microprocessor

32‧‧‧Power Management Controller

41‧‧‧light sensor

42‧‧‧Temperature sensor

5‧‧‧light-emitting device

6‧‧‧Terminal device

FIG. 1 is a block diagram of a first embodiment of the present invention; FIG. 2 is a block diagram of another first embodiment of the present invention; FIG. 3 is a block diagram of a second embodiment of the present invention; FIG. 4 is another block diagram of the second embodiment of the present invention.

Claims (8)

An automatic control system for an LED module includes: at least one LED unit having a plurality of LED chips; at least one fan, which is arranged on a side corresponding to the LED unit to dissipate the LED unit; at least one light sensor, It is arranged on one side of the adjacent LED unit to detect the brightness of the LED unit to generate a light sensing signal; and a control device including: an interface circuit which is electrically connected to the fan and the Light sensor; a microprocessor that is electrically connected to the interface circuit and generates a control signal according to the light sensing signal; and a power management controller that is electrically connected to the microprocessor and the LED unit respectively And the fan, and the power management controller controls and adjusts the brightness corresponding to the LED unit according to the received control signal. The automatic control system of the LED module according to item 1 of the scope of patent application, wherein the LED units constitute an LED module. The automatic control system of the LED module according to item 2 of the patent application scope, wherein the LED module is installed on a light-emitting device. The automatic control system of the LED module according to item 1 of the scope of patent application, wherein the microprocessor learns the brightness of the LED unit according to the light sensing signal, and compares the brightness of the LED unit with a set brightness value within the In contrast, if the brightness of the LED unit is lower than the set brightness value, a first warning signal is immediately sent to a connected terminal device. For example, the automatic control system of the LED module described in item 1 of the patent application scope further includes at least one temperature sensor disposed adjacent to the fan position, and the temperature sensor is electrically connected to the interface circuit, and the temperature sensor The detector is used to detect the external ambient temperature and the temperature around the fan to generate a temperature sensing signal. According to the automatic control system of the LED module according to item 5 of the patent application scope, wherein the microprocessor performs calculations according to the temperature sensing signal transmitted by the interface circuit to generate a driving signal to control the fan speed. The automatic control system of the LED module according to item 6 of the patent application scope, wherein the microprocessor learns the temperature of each part according to the temperature sensing signal, and compares the temperature of each part with a set temperature in the part If the temperature of the certain part exceeds the set temperature, a second warning signal is sent to a connected terminal device. According to the automatic control system of the LED module described in the first item of the patent application scope, wherein the power management controller is electrically connected to an input power source for supplying power to the fan and the LED unit, respectively.