TWM483203U - Dynamic load module of LED turn signal - Google Patents

Description

Dynamic load module for LED directional lights

The present invention is a dynamic load module used in an LED directional light, which aims to overcome the situation in which the vehicle direction light uses the LED as a light-emitting element to cause an abnormal operation, so that the LED directional light can meet the actual needs.

According to the direction of the vehicle, the direction of the other vehicles is recognized by the passerby. In order to ensure that the direction lights of the vehicle must be in normal operation, if the regulations stipulate that one of the left and right direction lights on the vehicle cannot operate normally, the other direction lights must In order to speed up the flashing, it is necessary to warn the user that the direction light failure must be repaired.

One of the above-mentioned directional lamps is damaged and the other directional lamps must be operated in a flash mode. It is not difficult for the conventional tungsten filament bulb to be used as a directional lamp because the power consumption of the tungsten filament bulb is high and its load is high. About 12W, it is high power consumption and easy to burn. When one of them is damaged, the control circuit can easily detect the load change, and then the other direction lights flash quickly.

However, in recent years, LEDs have the advantages of low power consumption and long service life, which can solve the problem that the conventional directional lamp is easy to burn using the tungsten light bulb, and can also reduce the power consumption. Therefore, the use of the LED on the vehicle luminaire is already Inevitable trend; when using LED as a directional light In the case of components, since the power consumption of each LED direction lamp group is only about 2W, although it has the advantages of low power consumption and long service life in use, it also causes the above control circuit to detect the load change obstacle.

For example, when one of the LED directional lamp groups fails, the load reduced by the damaging LED directional lamp group is relatively low compared to the total load on the vehicle, making it difficult for the control circuit to detect subtle load changes. It is also impossible to drive other direction lights to flash quickly. As a result, it is in a state where it cannot be used for warning, and it cannot comply with the laws and regulations.

As shown in the first figure, in the known technology, in order to solve the above problem of detecting load difficulty, a manufacturer is electrically connected to a set of detecting circuits 2 on the flasher 1, and the detecting circuit 2 provides an additional The power bypasses the ON/OFF flashing switch in the flasher 1 and is directly electrically connected to the power input of the LED directional light group 3. When the vehicle turns on the directional light switch, the control circuit (not shown) is first transmitted through the detection circuit 2 to the power input end of the LED directional light group 3; at this time, if the LED directional light group 3 is in a damaged state, Because the detection circuit 2 has no load feedback signal, the directional light control circuit can flash other normal LED directional light groups 3 to achieve the foregoing purpose.

In the above, the detection circuit is used to detect whether the operation of the LED direction lamp group is normal. In an ideal state, if the LED direction lamp group is in a damaged state, the damage state of the circuit disconnection can be detected, and then the proper function can be utilized. The function. However, according to the actual test of the creator of the case, it is found that if the LED directional light group is actually in a normal state, the use of the detection circuit will cause other normal LED directional light groups to generate abnormal actions.

There are two kinds of situations in which the detection circuit causes the LED direction group to operate abnormally, one of which is when the detection circuit 2 transmits the detection power to the LED direction group 3, the voltage is too low. The light control circuit may not be able to detect the load of the LED directional light group 3, and thus misjudge all the directional lights to be damaged, so that all the directional lights are not activated; in particular, the voltage of the vehicle itself is not stable enough due to the environment of the vehicle. This situation often occurs.

Another case of abnormal operation is that when the detection circuit 2 transmits the power to the LED directional lamp group 3, the supply of the power is relatively easy to detect whether the load of the LED directional lamp group 3 and the directional lamp circuit are normal. It also causes the LED direction light group 3 to be slightly bright; at this time, when the subsequent control circuit normally supplies power to cause the LED direction light group 3 to be activated to flash, the original LED direction light group 3 alternately lights up/extinguished, and should be extinguished. At this time, the LED directional light group 3 is always brightly lit due to the excess power provided by the detecting circuit. This situation will undoubtedly reduce the flicker recognition degree, and is also a kind of abnormal action of the directional light.

In view of the above problems, the creator has created a dynamic load module for LED directional lights based on his years of experience in related fields, especially the practical experience of LED lighting control, which not only enables the detection circuit to effectively The detection function is normally performed and the LED directional light group can operate normally.

The purpose of the present invention is to provide a dynamic load module for use in an LED directional light, which aims to overcome the situation in which the vehicle direction light uses the LED as a light-emitting element to cause an abnormal operation, so that the LED directional light can meet the actual needs.

In order to achieve the above objective, the dynamic load module of the LED direction light is electrically connected between the power output end of the flasher and the power input end of the LED direction light group, and includes a load circuit, and a control load circuit disconnection Protection circuit; when the flasher starts, When the detection circuit outputs a detection signal through the power output terminal to detect whether the LED direction light group is working normally, the load circuit can consume the excess power of the detection signal to avoid the LED direction light group being slightly bright, and then controlled by the protection circuit. After the load circuit is disconnected, the detection circuit can normally perform the detection function, and the normal LED direction light group does not continuously light up when it operates.

The principle of the above design is that when the LED directional lamp group is in a normal state, the load circuit can consume the excess power of the detection signal, so that the LED directional lamp group does not generate a slight light, and then the protection circuit is used to control the load circuit after disconnection. The directional light control circuit can supply power normally, so that the LED directional light group does not continuously light up when it is normally blinking.

When the LED directional light group is in a damaged state, the power input end of the LED directional light group is in a loop disconnection state, and although the load circuit initially consumes the power of the detection signal, when the protection circuit controls the load circuit to be disconnected, The detection circuit can normally detect that the LED direction light group is in a damaged state without load, and then the other direction lights flash quickly.

In other words, the dynamic load module of the LED direction light can not only enable the detection circuit to detect that the LED direction light group is in a damaged state, but also avoid the LED direction light group if the LED direction light group is normal. An unusually bright problem.

In addition, the foregoing protection circuit capable of controlling the disconnection of the load circuit may be implemented as a timing control loop to disconnect the load circuit for a set time. Alternatively, the protection circuit can also be a voltage detection circuit capable of detecting the voltage of the load circuit. When the voltage detection circuit detects that the load circuit consumes excess power of the detection signal, the load circuit can be disconnected.

During implementation, a power control module may be further disposed between the dynamic load module and the LED directional light group, and the power control module includes a power control unit connected to the power input end of the LED directional light group, and a connection to the load End output power adaptation unit, and one a power switch disposed between the power control unit and the output power adapting unit; wherein the power control unit includes a starting voltage detecting circuit configured with a minimum starting voltage value, and an overvoltage detecting set with a maximum starting voltage value Measuring circuit, when the input voltage of the power supply terminal is less than the minimum starting voltage value or greater than the maximum starting voltage value, the power switch is in a non-conducting state and is not supplied to the power matching unit; and the input voltage of the power supply terminal is greater than the When the minimum starting voltage value is less than the maximum starting voltage value, the power switch is turned on to supply the power to the load end according to the load requirement by the output power matching unit, thereby preventing the high voltage surge from passing through Damage to the load and the effect of preventing low voltage weak currents from causing abnormal operation of the circuit.

Moreover, in order not to affect the operation of the original directional light control circuit, the flasher and the detecting circuit of the vehicle, the dynamic load module and the power control module of the present invention can be jointly mounted on the circuit board of the LED directional light group, so that Creation can be easy to implement.

100‧‧‧Flasher

101‧‧‧Power output

200‧‧‧LED Directional Light Set

201‧‧‧Power input

10‧‧‧Load circuit

20‧‧‧Protection circuit

30‧‧‧Power Control Module

31‧‧‧Power Control Unit

32‧‧‧Output power adapter unit

33‧‧‧Power switch

The first figure reveals a schematic diagram of a circuit in the prior art that uses a detection circuit to detect whether an LED directional light group is functioning properly.

The second picture is a schematic diagram of the architecture of the LED directional light dynamic load module.

The third figure is an embodiment of the protection circuit in the present creation as a timing control loop.

The fourth figure is an embodiment of the LED directional light group in which the power control module is built in the third figure.

The fifth figure is an embodiment of the protection circuit in the present invention as a voltage detection loop.

The sixth figure is an embodiment of the LED directional light group in which the power control module is built in the fifth figure.

In the following, according to the technical means of the creation, the implementation method suitable for the creation is listed, and the description is as follows: as shown in the second figure, the dynamic load module of the LED direction light is electrically connected to the flasher 100. Between the power output 101 and the power input 201 of the LED directional light set 200, the architecture includes a load circuit 10, and a protection circuit 20 capable of controlling the load circuit 10 to be disconnected.

The flasher 100 has a detection circuit (not shown) connected to the power output terminal 101. When the flasher 100 is activated, the detection circuit first outputs a detection signal through the power output terminal 101 to detect the LED direction. When the lamp group 200 is operating normally, the load circuit 10 can consume excess power of the detection signal to prevent the LED direction light group 200 from being slightly bright, and then after the load circuit 10 is controlled to be disconnected by the protection circuit 20, the flash can be made. The detecting circuit of the device 100 can normally detect whether the LED directional light group 200 is normal, and does not continue to be slightly bright when the normal LED directional light group 200 is blinking.

As shown in the third figure, the principle of the above-mentioned creative design is that when the LED directional light group 200 is in a normal state, the load circuit 10 can consume excess power of the detection signal, so that the LED directional light group 200 does not generate a slight light. After the load circuit 10 is controlled to be turned off by the protection circuit 20, the directional light control circuit can normally supply power, so that the LED directional light group 200 can normally blink.

When the LED directional light group 200 is in a damaged state, the power input terminal 201 of the LED directional light group 200 is in a loop-off state, and the load circuit 10 initially consumes the power of the detection signal, but when the protection circuit 20 controls After the load circuit 10 is disconnected, the flasher 100 The detecting circuit can normally detect that the LED direction light group 200 is in a damaged state without load, and then the other direction lights flash quickly.

In the figure, the load circuit 10 is composed of a plurality of resistors and transistors, wherein the resistors can consume excess power of the flasher 100 detecting circuit, so that the excess power does not cause the LED directional light group 200 to be slightly bright. The transistor is electrically connected to the protection circuit 20. When the protection circuit 20 applies a reverse bias voltage to the transistor, the load circuit 10 can be disconnected to prevent the load circuit 10 from overheating due to continuous power supply, and the flash device 100 can be The LED directional light group 200 is subsequently operated normally.

In other words, by the dynamic load module of the LED direction light, the detection circuit can detect whether the LED direction light group 200 is in a damaged state, and if the LED direction light group 200 is normal, the LED direction light can also be avoided. The group 200 produces an abnormally bright problem due to the extra power provided by the detection circuit. In addition, the protection circuit 20 capable of controlling the disconnection of the load circuit 10 can be a timing control loop as shown in the figure. The capacitor is provided in the timing control loop. When the capacitor reaches the set value during the set time, Turn on and disconnect the load circuit 10.

As shown in the fourth figure, during implementation, a power control module 30 can be further disposed between the dynamic load module and the LED directional light group, and the power control module 30 includes a power source connected to the LED directional light group 200. The power control unit 31 of the input terminal 201, an output power adapter unit 32 connected to the load terminal, and a power switch 33 disposed between the power source control unit 31 and the output power adapter unit 32.

The power control unit 31 includes a startup voltage detection circuit configured with a minimum startup voltage value, and an overvoltage detection circuit configured with a maximum startup voltage value, such that the input voltage of the power input terminal 201 is less than the minimum startup. Voltage value is greater than the maximum starting voltage value In the state, the power switch 33 is in a non-conducting state and is not supplied to the power adapting unit 32, so that the LED directional light group 200 is not activated, thereby preventing the low voltage weak current from causing the LED directional light group 200 to malfunction.

When the input voltage of the power input terminal 201 is greater than the minimum starting voltage value and less than the maximum starting voltage value, the power switch 33 is turned on to supply power to the output power matching unit 32 according to the load demand. The LED directional light group 200 is thereby used to prevent damage to the LED directional light group 200 caused by high voltage surges.

As shown in the fifth figure, during the implementation of the present invention, the protection circuit 20 can also be a voltage detection loop capable of detecting the voltage of the load circuit 10 by a Zener diode, when the Zener diode is loaded by the load circuit. When the voltage of 10 exceeds a rated voltage, a reverse bias of the transistor of the load circuit 10 can be applied to disconnect the load circuit 10. The protection circuit 20 of the third and fifth figures above is controlled by various electronic components such as a capacitor or a Zener diode, and is generally a basic circuit that can be equivalently used, and will not be further described herein.

As shown in the sixth embodiment, a power control module 30 may be further disposed between the dynamic load module and the LED directional light group. The power control module 30 includes a light source group 200 connected to the LED. The power control unit 31 of the power input terminal 201, an output power adapting unit 32 connected to the load end, and a power switch 33 disposed between the power control unit 31 and the output power adapting unit 32, thereby achieving The prevention of the low voltage weak current causes the LED directional light group 200 to malfunction, or the high voltage spurt to cause damage to the LED directional light group 200.

Moreover, in order not to affect the operation of the original directional light control circuit, the flasher and the detecting circuit of the vehicle, the dynamic load module and the power control module of the present invention can be jointly mounted on the circuit board of the LED directional light group, so that Creation can be easy to implement.

The above description of the implementation and the drawings show only the best examples of the creation. The present invention is not limited to this creation; any similarity or similarity to the above-mentioned structures, devices, features, etc., should be within the scope of creation of the creation and the scope of patent application, and I hereby declare.

100‧‧‧Flasher

101‧‧‧Power output

200‧‧‧LED Directional Light Set

201‧‧‧Power input

10‧‧‧Load circuit

20‧‧‧Protection circuit

Claims (5)

A dynamic load module for an LED directional lamp is electrically connected between a power output end of the flasher detecting circuit and a power input end of the LED directional light group, and includes a load circuit and a protection for controlling the disconnection of the load circuit The circuit, wherein the detecting circuit outputs a detection signal through the power output terminal to detect whether the LED direction light group is working normally, the load circuit can consume excess power of the detection signal to avoid the LED direction light being slightly bright. The protection circuit is then used to control the disconnection of the load circuit so that the normal LED directional lamp group does not continue to illuminate. The dynamic load module of the LED directional lamp according to claim 1, wherein the protection circuit is a timing control loop, and when the load circuit consumes excess power of the detection signal, the load circuit is set for a set time. disconnect. The dynamic load module of the LED directional lamp according to claim 1, wherein the protection circuit is a voltage detection circuit capable of detecting a voltage of the load circuit, and the load circuit consumes excess power of the detection signal. After that, the load circuit is disconnected. The dynamic load module of the LED directional lamp according to any one of claims 1 to 3, wherein a power control module is further disposed between the dynamic load module and the LED directional light group, and the power control module is further provided. The utility model comprises a power control unit connected to the power input end of the LED directional light group, an output power adapting unit connected to the load end, and a power switch disposed between the power control unit and the output power adapting unit; wherein the power source The control unit includes a startup voltage detection circuit configured with a minimum startup voltage value, and an overvoltage detection circuit configured with a maximum startup voltage value, such that an input voltage of the power supply terminal is less than the minimum startup voltage value or greater than a maximum startup voltage In the value state, the power switch is in a non-conducting state and is not powered to the power adapter. And when the input voltage of the power supply terminal is greater than the minimum starting voltage value and less than the maximum starting voltage value, the power switch is turned on to supply the power to the load end according to the load requirement by the output power matching unit. Thereby, the utility model can prevent the damage of the load by preventing the passage of the high voltage surge, and prevent the low voltage weak electricity from causing the abnormal operation of the loop. For example, the dynamic load module of the LED directional lamp described in claim 4, wherein the dynamic load module and the power control module are jointly mounted on the circuit board of the LED directional light group.