CN202435678U - A light-emitting diode light source adjustment circuit - Google Patents

Abstract

The utility model discloses an adjustment circuit of a light emitting diode light source, which comprises: a device that receives at least two kinds of external adjustment signals, performs centralized processing on the external adjustment signals and/or internally generated internal adjustment signals, and outputs an adjustment control signal Centralized controller; and, a LED driver that has a dimming line reserved and receives an adjustment control signal from the centralized controller to adjust the current output to the LED load; the LED driver is connected between the power supply and the LED load During the interval, the output terminal of the centralized controller is connected to the standard dimming interface of the LED driver (that is, the reserved dimming line). By adopting the embodiment of the utility model, the LED light source can respond to multiple adjustment signals at the same time, and intelligent adjustment to the LED light source can be realized.

Description

A light-emitting diode light source adjustment circuit

technical field

The utility model relates to the technical field of dimming control, in particular to an adjusting circuit of a light emitting diode light source.

Background technique

LED (Light Emitting Diode, light-emitting diode) light source has the advantages of long life and high light efficiency, and can save a lot of electric energy. Moreover, the driving and control methods of the LED light source are simple, and it is convenient to adjust the luminous brightness flexibly. It is especially suitable for some applications that need to adjust the luminous brightness according to different situations, such as street lamps, squares and other public places and indoor lighting systems. When 100% illumination brightness is not needed, reducing the brightness appropriately can save a lot of electric energy.

Referring to FIG. 1 , it is a schematic diagram of a dimming scheme of an existing commonly used LED light source. As shown in Figure 1. The LED driver 2a is connected between the power supply 1a and the LED load 4a. The dimmer 3a is connected to a standard dimming interface (also called a dimming line) of the LED driver 2a. The dimmer 3a receives an adjustment signal input by the user, and outputs a corresponding dimming control signal to the LED driver 2a, thereby adjusting the current of the LED load 4a to realize dimming control of the LED load 4a.

In the existing LED light source dimming scheme, the brightness of the LED light source only responds to the adjustment signal of the user, and cannot change the brightness or respond to other adjustment signals due to different situations. For example, when the LED light source is used as a street light, it cannot automatically sense day or night to adjust its own brightness; or when the LED light source is installed in a corridor, it cannot adjust its own brightness according to whether there are people passing by in the corridor.

It can be seen that the existing scheme cannot realize the intelligent adjustment of the LED light source, and the existing LED light source cannot respond to multiple adjustment signals at the same time.

Utility model content

In view of this, the purpose of the present utility model is to provide an adjustment circuit for LED light source, which can realize intelligent adjustment of LED light source, so that LED light source can respond to multiple adjustment signals at the same time.

The utility model provides an adjustment circuit of a light emitting diode light source, and the adjustment circuit includes:

An LED driver with a dimming line reserved and whose output current varies with the magnitude of the signal on the dimming line; and,

A centralized controller that receives at least two kinds of external adjustment signals, and outputs adjustment control signals after centralized processing of the external adjustment signals and/or internally generated internal adjustment signals;

The LED driver is connected between the power supply and the LED load, the output terminal of the centralized controller outputs the adjustment control signal to the dimming line of the LED driver, and adjusts the current output from the LED driver to the LED load size.

Preferably, the centralized controller includes: a priority management module and an execution module;

The priority management module includes:

a priority allocation unit that receives at least two external adjustment signals and assigns corresponding priority coefficients to said external adjustment signals and/or internal adjustment signals; and,

A priority comparison unit that compares the priority coefficients of the received external adjustment signal and/or internal adjustment signal, determines the adjustment signal with the highest priority coefficient, and outputs the result of the priority comparison;

The execution module includes:

An execution unit corresponding to each adjustment signal receives an adjustment signal, processes the adjustment signal, and outputs a current adjustment signal analogous to the magnitude of the signal on the adjustment line; and,

- receiving the adjustment signal of each execution unit, according to the priority comparison result output by the priority comparison unit, selecting an adjustment signal of an execution unit as the coordination processing unit output by the adjustment control signal according to a preset rule;

The input terminal of the priority allocation unit receives at least two kinds of external adjustment signals, and the output terminal is connected to the input terminal of the priority comparison unit; the output terminal of the priority comparison unit is connected to the input terminal of the coordination processing unit;

The input terminal of the execution unit is connected to an external adjustment signal or an internal adjustment signal, and the output terminal is connected to the input terminal of the coordination processing unit; the output terminal of the coordination processing unit is connected to the dimming line of the LED driver.

Preferably, the coordination processing unit compares the relationship between the adjustment signals received from each execution unit, and if the relationship between the adjustment signals is mutually exclusive, then output the adjustment signal with the highest priority as the adjustment control signal; if the relationship between the adjustment signals For compatibility, when the high-priority adjustment signal is satisfied, the low-priority adjustment signal is output as the adjustment control signal.

Preferably, the internal adjustment signal is a timing dimming signal; the execution unit corresponding to the timing dimming signal is to cycle the timing with a preset cycle, and trigger the concentrated The controller outputs a first timing unit for adjusting control signals corresponding to different time periods.

Preferably, the centralized controller further includes: receiving an adjustment signal of an execution unit output by the coordination processing unit, performing logic operations on the adjustment signal of the execution unit and a specific adjustment signal, and outputting it as the adjustment control signal computing module.

Preferably, the operation module includes: when the specific adjustment signal is an optical attenuation compensation signal, an adjustment signal of an execution unit output by the coordination processing unit corresponds to a preset optical attenuation compensation signal corresponding to the optical attenuation compensation signal After the coefficients are multiplied, it is used as the first calculation unit for the output of the adjustment control signal; wherein, the light attenuation compensation coefficient is less than or equal to 1.

Preferably, the centralized controller further includes: timing the accumulated lighting time of the LED load, and outputting a light attenuation compensation coefficient to the first computing unit when the timing reaches a preset timing period, and restarting the timing , a second timing unit that adds 1 to the number of counting times; as the number of counting times increases, the light attenuation compensation coefficient increases.

Preferably, the operation module further includes: when the specific adjustment signal is a maximum current setting value, a preset function corresponding to the adjustment signal of an execution unit output by the coordination processing unit and the maximum current setting value After the maximum current setting coefficient is multiplied, it is used as the second calculation unit for the output of the adjustment control signal; wherein, the maximum current setting coefficient is less than or equal to 1.

Preferably, the external adjustment signal is an energy-saving signal, a protection signal, or a dimming signal.

Preferably, the adjustment circuit further includes: a setting module for setting the magnitude of the output signal of the execution unit corresponding to each adjustment signal and/or the magnitude of the specific adjustment signal; the output terminal of the setting module connected to the input terminals of each execution unit and/or the input terminal of the operation module.

Preferably, the setting function of the setting module includes: setting the maximum current value in the over-temperature protection state, setting the maximum current value in the unmanned sensing state in the lighting area, and setting the constant lumen range in the lighting area , set the maximum output current value of the LED driver driving different LED loads, set the light attenuation compensation coefficient, set the current value of timing dimming in each time period, or set any one of the default output current values species or any number of species.

Preferably, the setting method of the setting module is any one or more of setting by connecting resistors with different resistance values, software setting, wireless or infrared remote control setting.

Preferably, the dimming line is a 0 to 10V dimming line, or a PWM dimming line

According to the specific embodiment provided by the utility model, the utility model discloses the following technical effects:

The adjustment circuit of the LED light source in the embodiment of the utility model, through the centralized controller, enables the brightness of the LED load to respond to various adjustment signals, and realizes multiple adjustment functions, thus realizing the intelligent control of the LED load. adjust. Moreover, the circuit structure is simple, and the centralized controller and the LED driver can be packaged independently of each other. When any one of the centralized controller and the LED driver is damaged, it only needs to replace the corresponding standard module, which makes the circuit easy to maintain .

Description of drawings

Fig. 1 is a schematic diagram of a dimming scheme of an existing commonly used LED light source;

Fig. 2 is a circuit diagram of the adjustment circuit of the LED light source described in Embodiment 1 of the present utility model;

Fig. 3 is the first implementation form circuit diagram of the centralized controller of the utility model embodiment;

Fig. 4 is a waveform diagram of a timing dimming signal provided by an embodiment of the present invention;

Fig. 5 is the circuit diagram of the second realization form of the centralized controller of the utility model embodiment;

Fig. 6 is a circuit diagram for adjusting the LED light source described in the second embodiment of the utility model;

Fig. 7 is a circuit diagram of the adjustment circuit of the light emitting diode light source described in the third embodiment of the present invention.

Detailed ways

In order to make the above purpose, features and advantages of the utility model more obvious and understandable, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

In view of this, the purpose of the present utility model is to provide an adjustment circuit for LED light source, which can realize intelligent adjustment of LED light source, so that LED light source can respond to multiple adjustment signals at the same time.

Referring to FIG. 2 , it is a circuit diagram for adjusting the LED light source according to the first embodiment of the present utility model. As shown in FIG. 2 , the regulating circuit includes: an LED driver 20 and a centralized controller 30 .

Wherein, the LED driver 20 is reserved with a dimming line (ie, a standard dimming interface), and its output current varies with the magnitude of the signal on the dimming line.

The centralized controller 30 receives at least two kinds of external adjustment signals (as shown by S1 to Sn in FIG. 2 , n≥2), and after performing centralized processing on the external adjustment signals and/or internal adjustment signals, outputs one adjustment signal. The control signal passes through the dimming line to the LED driver 20, so that the output current Io of the LED driver 20 can respond to various adjustment signals (the various adjustment signals include the external adjustment signal and/or the internal adjustment signal) .

The LED driver 20 is connected between the power supply 10 and the LED load 40, receives the adjustment control signal from the output terminal of the centralized controller 30 through the dimming line, and adjusts the current Io output to the LED load 40, thereby realizing LED Dimming control of load 40.

Wherein, the external adjustment signal is an adjustment signal received by the centralized controller 30 from outside; the internal adjustment signal is an adjustment signal preset inside the centralized controller 30 .

It should be noted that the centralized controller 30 can only output the adjustment control signal according to the received external adjustment signal; it can also output the adjustment control signal only according to the internal adjustment signal; it can also combine the external adjustment signal and the internal adjustment signal output Adjust the control signal.

It can be seen that the adjustment circuit of the LED light source in the embodiment of the present utility model outputs an adjustment control signal to the dimming line reserved by the LED driver 20 through the centralized controller 30, so that the LED driver 20 outputs to the LED The current of the load 40 can respond to various adjustment signals, that is, the brightness of the LED load 40 can respond to various adjustment signals, realizing multiple adjustment functions, thus realizing the intelligent adjustment of the LED load. Moreover, the circuit structure is simple, and the centralized controller and the LED driver can be packaged independently of each other. When any one of the centralized controller and the LED driver is damaged, it only needs to replace the corresponding standard module, which makes the circuit easy to maintain .

The LED driver can adopt a driver with a standard dimming interface, that is, a dimming line is reserved for the LED driver, which requires the internal circuit design of the LED driver so that the output current can follow the dimming line on the dimming line. Varies with changes in the magnitude of the applied signal. When the user only needs the conventional dimming function, the conventional dimmer can be directly connected externally; when the user needs to realize multiple adjustment functions for the LED load, it is only necessary to connect the output terminal of the centralized controller to the LED driver The dimming line is sufficient, which makes the LED driver more versatile. For the LED driver manufacturer, it reduces the research and development cost of the LED driver with various functions. In addition, the regulating circuit of the LED light source has a simple interface and is easy to be standardized.

Further, the output terminal of the centralized controller can be connected to multiple LED drivers, so that the centralized controller can uniformly adjust the output currents of multiple LED drivers, and realize uniform dimming control of multiple LED loads.

Referring to FIG. 3 , it is a circuit diagram of the first implementation form of the centralized controller described in the embodiment of the present invention. As shown in FIG. 3 , the centralized controller 30 may include: a priority management module 301 and an execution module 302 .

Wherein, the priority management module 301 includes: a priority allocation unit 3011 and a priority comparison unit 3012 .

The execution module 302 includes: an execution unit 3021 and a coordination processing unit 3022 corresponding to various adjustment signals one-to-one.

The input terminal of the priority allocation unit 3011 receives at least two kinds of external adjustment signals, and its output terminal is connected to the input terminal of the priority comparison unit 3012; the output terminal of the priority comparison unit 3012 is connected to the coordination processing unit 3022 input terminal.

The input of the execution unit 3021 is connected to an external adjustment signal or an internal adjustment signal, and its output is connected to the input of the coordination processing unit 3022; the output of the coordination processing unit 3022 is connected to the adjustment of the LED driver 20. light.

The priority allocation unit 3011 is configured to receive at least two kinds of external adjustment signals, and assign corresponding priority coefficients to various types of adjustment signals (including external adjustment signals and/or internal adjustment signals).

The priority comparison unit 3012 is configured to compare the priority coefficients of the multiple received adjustment signals when there are multiple adjustment signals to be responded to at a certain moment, determine the adjustment signal with the highest priority coefficient, and Output the priority comparison result to the coordination processing unit 3022 of the execution module 302 .

The execution unit 3021 is configured to receive an adjustment signal, process the adjustment signal, and output a current adjustment signal similar to the magnitude of the signal on the adjustment line. For example, the adjustment signal received by the execution unit 3021 is an infrared dimming signal, and the processing of the infrared dimming signal by the execution unit specifically refers to detecting the magnitude of the infrared dimming signal and correspondingly obtaining a current adjustment signal , and the magnitude of the current regulation signal is analogous to the magnitude of the signal on the dimming line, which can directly change the output current of the LED driver.

The coordination processing unit 3022 receives the adjustment signal output by each execution unit 3021, and selects an execution unit 3021 to output according to a preset rule according to the priority comparison result output by the priority comparison unit 3012 of the priority management module 301. The adjustment signal is sent to the LED driver 20 as the adjustment control signal, so that the output current Io of the LED driver 20 can respond to the highest priority adjustment signal first.

It should be noted that, in order to enable the output current of the LED driver to respond to a variety of adjustment signals for the adjustment circuit of the LED light source described in the embodiment of the utility model, the preset rules include the following two: first, the first response priority The highest adjustment signal; second, respond to various adjustment signals as much as possible.

Further, the coordination processing unit 3022 is configured to compare the relationship between the adjustment signals received from the execution units 3021, and if the relationship between the adjustment signals is mutually exclusive, then output the adjustment signal with the highest priority as the adjustment control signal; If the relationship between the adjustment signals is compatible, then if the adjustment signal with high priority can be satisfied, the adjustment signal with low priority is output as the adjustment control signal.

The following uses a specific example to illustrate.

Example 1: Assuming that the first adjustment signal is an infrared dimming signal, the output current of the LED driver 20 is 25mA after responding to the first adjustment signal; the second adjustment signal is a timing dimming signal, and the LED driver 20 responds to the The output current after the second adjustment signal is 20mA; and the priority of the first adjustment signal is higher than the priority of the second adjustment signal. Then the coordination processing unit 3022 judges that the priority of the first adjustment signal is higher than that of the second adjustment signal, and the two adjustment signals are mutually exclusive, then the coordination processing unit 3022 outputs the first adjustment signal To the LED driver 20, so that the LED driver 20 responds to the first adjustment signal, and the output current is 25mA, which meets the first item of the above-mentioned preset rule.

Example 2: Assuming that the first adjustment signal is an over-temperature protection signal, the output current of the LED driver 20 after responding to the first adjustment signal is less than or equal to 30mA; the second adjustment signal is an infrared dimming signal, and the LED driver 20 responds The output current after the second adjustment signal is 25mA; and the priority of the first adjustment signal is higher than the priority of the second adjustment signal. Then the coordination processing unit 3022 judges that the priority of the first adjustment signal is higher than that of the second adjustment signal, and the two adjustment signals are compatible (25mA belongs to the range of 0 to 30mA), then the coordination The processing unit 3022 outputs the second adjustment signal to the LED driver 20, so that the LED driver 20 responds to the second adjustment signal and outputs a current of 25mA. At this time, the output current of the LED driver 20 not only responds to the second adjustment signal, but also satisfies the response result of the first adjustment signal, and complies with the first and second items of the above preset rules.

However, it should be noted that in Example 2, the premise of responding to the second adjustment signal is that the response result of the first adjustment signal can be satisfied. If the response to the second adjustment signal cannot satisfy the response to the first adjustment signal, the first adjustment signal is still responded to. For example, if in Example 2, the priority of the second adjustment signal is higher than that of the first adjustment signal, although the two adjustment signals are still in a compatible relationship at this time, because the second adjustment signal may not be able to satisfy the second adjustment signal in response to the first adjustment signal The adjustment signal (for example, the output current of the LED driver 20 in response to the first adjustment signal is 25 mA), therefore, should also respond to the second adjustment signal with higher priority.

Further, in the embodiment of the present utility model, when the internal adjustment signal is a timing dimming signal, the execution unit corresponding to the timing dimming signal may be a first timing unit.

The first timing unit is used to cycle timing with a preset cycle, and trigger the centralized controller 30 to output adjustment control signals corresponding to different time periods to the dimming line when different time periods of a cycle end. The LED driver 20 adjusts the brightness of the LED load 40 . Wherein, the preset cycle can be specifically set according to actual needs. Generally, it can be set to 1 day (ie 24 hours).

In the following, description will be made by taking the cycle as one day (24 hours) as an example. Referring to FIG. 4 , it is a waveform diagram of a timing dimming signal provided by an embodiment of the present invention.

As shown in Figure 4, when 0<t<t1, it means that there is less demand for lighting during the time period from early morning to dawn in the day, at this time, the LED light source illuminates with a certain brightness, I=I1; when t1<t When <t2, it means that there is no need for lighting during the daytime period of the day, and the LED light source is turned off at this time, I=0; when t2<t<t3, it means that the demand for lighting is relatively large after nightfall during the day, and the LED light source is at a certain Brightness lighting, I=I2; and I1<I2, that is, the required lighting brightness of the third time period (after nightfall) is higher than that of the first time period (between early morning and dawn). Cycle control is then carried out on a 24-hour basis. Among them, I is the current flowing through the LED light source.

Referring to FIG. 5 , it is a circuit diagram of the second implementation form of the centralized controller described in the embodiment of the present invention. The difference between the second implementation form shown in FIG. 5 and the first implementation form shown in FIG. 3 is that: the centralized controller 30 may further include: a computing module 303 .

The operation module 303 receives the adjustment signal of a certain execution unit 3021 output by the coordination processing unit 3022, performs logic operations on the adjustment signal of the execution unit 3021 and a specific adjustment signal, and outputs it as the adjustment control signal to the adjustment control signal. The LED driver 20 described above.

It should be noted that the output current of the LED driver 20 responds to the specific adjustment signal in real time, which generally does not serve as the user's adjustment target and is related to the LED light source selected by the user.

Preferably, the computing module 303 may include a first computing unit.

The first computing unit is configured to preset the adjustment signal of a certain execution unit 3021 output by the coordination processing unit 3022 corresponding to the light attenuation compensation signal when the specific adjustment signal is the light attenuation compensation signal After the light attenuation compensation coefficients are multiplied, they are output as the adjustment control signal. Wherein, the light attenuation compensation coefficient is less than or equal to 1. It should be noted that the size of the preset light attenuation compensation coefficient can be adjusted by a setting unit.

Further, on the basis that the computing module 303 includes a first computing unit, the centralized controller 30 may also include a second timing unit for timing the accumulated lighting time of the LED load 40, and when the timing reaches the preset During the timing period, output a light attenuation compensation coefficient to the first computing unit, restart the timing, and add 1 to the number of timings. As the counting times increase, the light attenuation compensation coefficient increases.

It should be noted that when the LED load is driven by a constant current source, its driving current is constant. However, due to the aging effect of chips and phosphors, the luminous flux output by the LED load will decrease with time, that is, the light output of the LED load will gradually decay. It can be seen that setting the second timing unit in the centralized controller 30 can compensate for the light attenuation problem existing in the above-mentioned LED load. For example, suppose that in the early stage of LED light source use, the light attenuation compensation coefficient is 0.7 when the light is turned on for 1000 hours; the light attenuation compensation coefficient is 0.8 after the next 1000 hours of lighting; and so on. Specifically, in practical applications, corresponding light attenuation compensation coefficients can be preset according to light attenuation speeds of different LED loads.

Preferably, the computing module 30 may further include a second computing unit.

The second calculation unit is configured to, when the specific adjustment signal is a maximum current setting value, match the adjustment signal of a certain execution unit 3021 output by the coordination processing unit 3022 to the maximum current setting value After the preset maximum current setting coefficient is multiplied, it is output as the adjustment control signal. Wherein, the maximum current setting coefficient is less than or equal to 1.

It should be noted that the preset maximum current setting coefficient can be set by a setting unit, such as a dial switch, in order to enable the LED driver 20 to adapt to LEDs with different rated currents. Load 40. For example, when driving an LED load with a rated current of 300mA, the setting coefficient of the maximum current is 1, and when driving an LED load with a rated current of 150mA, the setting coefficient of the maximum current is 0.5.

Preferably, based on all the above-mentioned embodiments, the external adjustment signal may be output signals of various sensors.

For example, the output signal of the thermistor used to sense the temperature of the LED load; the output signal of the light sensor used to sense the ambient brightness; the sensor signal used to sense the human body, etc.

Various sensors detect and sense external signals and physical conditions (such as light, heat, etc.), and transmit the detected information to the centralized controller 30, so that the adjustment circuit of the LED light source can Controlling the brightness of the LED load 40 means that the adjustment circuit described in the embodiment of the present invention can automatically adjust the brightness of the LED load 40 following changes in the external environment, thereby realizing intelligent control of the LED light source.

Preferably, based on all the above-mentioned embodiments, the external adjustment signal may be an energy-saving signal, a protection signal, a dimming signal, and the like.

Specifically, when the external adjustment signal is an energy-saving signal, the adjustment circuit can control the brightness of the LED load only to meet the basic needs of users, thereby achieving the effect of energy saving.

When the external dimming signal is a protection signal, the adjusting circuit can reduce the brightness of the LED load, or turn off the LED load, so as to protect the adjusting circuit itself or the LED load.

When the external dimming signal is a dimming signal, the regulating circuit can freely adjust the brightness of the LED load according to user's requirements.

It should be noted that, in practical applications, the priority of the energy-saving signal may be set to be higher than the priority of the dimming signal, and the priority of the protection signal may be set to be higher than the priority of the dimming signal. At this time, the output current of the LED driver needs to be the first to respond to the protection signal and the energy saving signal. If the priority of the energy-saving signal and protection signal is set to be lower than the priority of the dimming signal, the energy-saving effect and protection function will not be achieved, which will not only cause waste of resources, but also may cause abnormal LED driver and LED load. normal work.

Preferably, based on all the above-mentioned embodiments, the external adjustment signal can be human body induction signal, over-temperature protection signal, constant lumen control signal, infrared dimming signal, analog dimming signal, data protocol transmission signal, maximum current setting Any two or more of the signals.

Specifically, when the external adjustment signal is a human body induction signal, if the human body induction signal indicates that there are people in the illuminated area, the adjustment circuit controls the LED load to illuminate with a preset brightness; if the human body induction signal Indicates that there is no one in the lighting area, and the regulating circuit controls the LED load to reduce brightness or turn off.

When the external adjustment signal is an over-temperature protection signal, if the over-temperature protection signal indicates that the LED load is overheated, the adjustment circuit controls the LED load to reduce brightness or turn off.

When the external adjustment signal is a constant lumen control signal, if the constant lumen control signal indicates that the brightness in the illuminated area is too dark, the adjustment circuit controls the brightness of the LED load to increase so that the brightness in the illuminated area Brightness is always maintained within a certain range.

When the external adjustment signal is an infrared dimming signal, an analog dimming signal, or a data protocol transmission signal, the adjustment circuit controls the brightness of the LED load to be adjusted according to user requirements. Wherein, the analog dimming signal may be a 0-10V dimming signal, a PWM dimming signal, a chopping dimming signal, and the like. The data protocol transmission signal may be a DALI protocol transmission signal, a DMX512 protocol transmission signal, or other dimming protocol signals.

Preferably, the adjustment circuit may further include: a setting module. The output terminal of the setting module is connected to the input terminal of each execution unit 3021 and/or the input terminal of the transport module 303, and is used to set the output signal magnitude and and/or said specific modulation signal magnitude.

The setting function of the setting module can be: set the maximum current value in the over-temperature protection state, set the maximum current value in the unmanned sensing state in the lighting area, set the constant lumen range in the lighting area, set Any one of setting the maximum output current value of the LED driver 20 driving different LED loads 40, setting the light attenuation compensation coefficient, setting the current value of timing dimming in each time period, and setting the default output current value or any variety. Wherein, the setting of the default output current value refers to setting the output current of the LED driver 20 when the input terminal of the centralized controller 30 does not input an external adjustment signal, or setting the output current of the LED driver 20 when starting the machine. The output current of the LED driver 20.

It should be noted that the setting module can be set independently from the centralized controller 30 , or can be integrated in the centralized controller 30 .

Further, the setting mode of the setting module can be any one or more of setting by connecting resistors with different resistance values, software setting, wireless or infrared remote control setting.

It should be noted that, when the setting method is software setting, the centralized controller 30 is required to be provided with a programming interface.

Based on all the above-mentioned embodiments, the utility model also provides a specific implementation form of the regulating circuit of the LED light source. Referring to FIG. 6 , it is a circuit diagram of the adjustment circuit of the LED light source described in Embodiment 2 of the present utility model.

The difference between the adjusting circuit in the second embodiment shown in FIG. 6 and the first embodiment shown in FIG. 2 is that the adjusting circuit further includes an input signal conversion module 50 .

As shown in Figure 6, the output terminal of the input signal conversion module 50 is connected to the input terminal of the centralized controller 30, and is used to convert the at least two kinds of external adjustment signals into the effective range of the input terminal of the centralized controller 30 After the internal signal is sent to the centralized controller 30.

For example, when the external adjustment signal comes from a sensor, the signal is generally relatively weak. At this time, in order to facilitate the processing of this type of signal by the centralized controller 30, the input signal conversion module 50 can firstly process this type of signal. The external conditioning signal is amplified.

Based on all the above-mentioned embodiments, the utility model also provides a specific implementation form of the regulating circuit of the LED light source. Referring to FIG. 7 , it is a circuit diagram of the adjustment circuit of the LED light source described in Embodiment 3 of the present utility model.

The difference between the adjustment circuit of the third embodiment shown in FIG. 7 and the first embodiment shown in FIG. 2 is that the adjustment circuit further includes an output signal conversion module 60 .

As shown in Figure 7, the output signal conversion module 60 is connected between the output terminal of the centralized controller 30 and the dimming line of the LED driver 20, and is used to adjust the output signal of the centralized controller 30 converted into a standard signal on the dimming line, and then output to the LED driver 20 .

For example, when the dimming line of the LED driver 20 is a 0-10V dimming line, if the adjustment control signal output by the centralized controller 30 is a PWM signal, the PWM signal can be converted by the output signal conversion module 60 It is a 0-10V level signal. Specifically, the output signal conversion module 60 may be implemented by a filter circuit.

Certainly, in the adjustment circuit of the LED light source described in Embodiment 4 of the present utility model, the adjustment circuit may include both the input signal conversion module 50 and the output signal conversion module 60 . Its specific implementation is the same as that of Embodiments 2 and 3, and will not be repeated here.

Based on all the above-mentioned embodiments, the centralized controller and the LED driver can be packaged independently of each other. When the centralized controller is placed outside the LED driver, and all kinds of adjustment signals are combined into one signal output, for the user, the LED driver is more versatile. When only the dimming function is required, the centralized controller can not be connected. When realizing multiple functions, an external centralized controller can be connected through the dimming line, which is easy to operate. For manufacturers of LED drivers, the research and development costs of LED drivers with various functions are reduced.

Preferably, the input signal conversion module 50 and/or the output signal conversion module 60 can be integrated and packaged with the centralized controller.

It should be noted that, in the embodiment of the present utility model, the dimming line of the LED driver is generally a 0-10V dimming line, and may also be a PWM dimming line. The 0-10V dimming line means that the LED driver can respond to signals within the range of 0 to 10V on the dimming line.

In addition, each module in the centralized controller can be implemented by software programming using a central processing unit or a single-chip microcomputer, or can be implemented by a digital circuit.

The adjustment circuit of a light-emitting diode light source provided by the utility model has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the utility model. The description of the above examples is only for helping understanding The method of the utility model and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the utility model, there will be changes in the specific implementation and application range. To sum up, the contents of this specification should not be understood as limiting the utility model.

Claims (13)

1. the regulating circuit of a LED source is characterized in that, said regulating circuit comprises:

One is reserved with the light modulation line, and the led driver that changes along with the variation of signal magnitude on the said light modulation line of the size of output current; With,

One receives at least two kinds of external adjustment signals, and after said external adjustment signal and/or the inner internal regulation signal that produces were focused on, the Centralized Controller of control signal was regulated in output;

Said led driver is connected between power supply and the said LED load, and the output of said Centralized Controller is exported the light modulation line that said adjusting controls signal to said led driver, regulates the size of current that said led driver exports the LED load to.

2. circuit according to claim 1 is characterized in that, said Centralized Controller comprises: priority management module and Executive Module;

Said priority management module comprises:

One receives at least two kinds of external adjustment signals, is the priority unit of said external adjustment signal and/or internal regulation signal allocation corresponding priority level coefficient; With,

The priority factor of a pair of external adjustment signal that receives and/or internal regulation signal compares, and confirms the conditioning signal that priority factor is the highest, and with the priority comparing unit of priority ratio result output;

Said Executive Module comprises:

With each conditioning signal performance element one to one, receive a kind of conditioning signal, said conditioning signal to be handled, output is analogous to the current regulating signal of signal magnitude on the said light modulation line; With,

One receives the conditioning signal of each performance element, according to the priority comparative result of said priority comparing unit output, selects the Coordination Treatment unit of the conditioning signal of a performance element as said adjusting control signal output according to preset rule;

The input of said priority unit receives at least two kinds of external adjustment signals, the input of the said priority comparing unit of output termination; The input of the said Coordination Treatment of the output termination unit of said priority comparing unit;

The input termination one external adjustment signal or an internal regulation signal of said performance element, the input of the said Coordination Treatment of output termination unit; The light modulation line of the said led driver of output termination of said Coordination Treatment unit.

3. circuit according to claim 2; It is characterized in that; Said Coordination Treatment unit relatively is received from the relation of the conditioning signal of each performance element, if the relation of each conditioning signal is for repelling each other, the conditioning signal that then output priority is the highest is as said adjusting control signal; If the relation of each conditioning signal is compatible, then under the situation that the conditioning signal of high priority is satisfied, the conditioning signal of output low priority is as said control signal.

4. circuit according to claim 2 is characterized in that, said internal regulation signal is the timing dimming signal;

The performance element corresponding with said timing dimming signal is with the preset period circulation regularly, when the different time sections of one-period regularly finishes, to trigger first timing unit of the corresponding adjusting control signal of said Centralized Controller output different time sections.

5. circuit according to claim 2 is characterized in that, said Centralized Controller also comprises:

Receive the conditioning signal of a performance element of said Coordination Treatment unit output, the conditioning signal and the particular adjustments signal of said performance element carried out logical operation after, the computing module of exporting as said adjusting control signal.

6. circuit according to claim 5 is characterized in that, said computing module comprises:

When said particular adjustments signal is the light decay compensating signal; After the conditioning signal of one performance element of said Coordination Treatment unit output multiplied each other with said light decay compensating signal corresponding preset light decay penalty coefficient, first arithmetic element of exporting as said adjusting control signal; Wherein, said light decay penalty coefficient is smaller or equal to 1.

7. circuit according to claim 6 is characterized in that, said Centralized Controller also comprises:

Accumulative total lighting hours to the LED load is carried out timing, when timing reaches preset timing section, exports a light decay penalty coefficient to said first arithmetic element, and restarts timing, and the timing number of times adds 1 second timing unit; Along with the increase of said timing number of times, said light decay penalty coefficient increases.

8. circuit according to claim 5 is characterized in that, said computing module also comprises:

When said particular adjustments signal is the maximum current set point; After the conditioning signal of one performance element of said Coordination Treatment unit output set multiplication with said maximum current set point corresponding preset maximum current, second arithmetic element of exporting as said adjusting control signal; Wherein, said maximum current is set coefficient smaller or equal to 1.

9. according to each described circuit of claim 1 to 8, it is characterized in that said external adjustment signal is energy-conservation signal, guard signal, dim signal.

10. circuit according to claim 5 is characterized in that, said regulating circuit also comprises:

Set the output signal magnitude of the corresponding said performance element of said each conditioning signal difference and/or the setting module of said particular adjustments signal magnitude;

The input of each performance element of output termination of said setting module and/or the input of said computing module.

11. circuit according to claim 10 is characterized in that, the set-up function of said setting module comprises:

Be set in lowest high-current value under the overheat protector state, set the lowest high-current value under the unmanned sense state in the field of illumination, set the bright scope of constant current in the field of illumination, set maximum output current value that said led driver drives the different LED load, set the light decay penalty coefficient, set timing dimming at the current value of each time period, perhaps set in the current value of default output any one or multiple arbitrarily.

12. according to claim 10 or 11 described circuit, it is characterized in that, the setting means of said setting module for the resistance setting through connecting different resistances, software set, wireless or infrared remote control in setting any one or multiple.

13., it is characterized in that said light modulation line is 0 to 10V light modulation line, perhaps is PWM light modulation line according to each described circuit in the claim 1 to 8,10 and 11.

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