CN208143540U - A kind of heat management device and system of LED - Google Patents
A kind of heat management device and system of LED Download PDFInfo
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- CN208143540U CN208143540U CN201820607394.0U CN201820607394U CN208143540U CN 208143540 U CN208143540 U CN 208143540U CN 201820607394 U CN201820607394 U CN 201820607394U CN 208143540 U CN208143540 U CN 208143540U
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- heat management
- operating temperature
- management device
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Abstract
The utility model discloses the heat management device of LED a kind of and systems, including：For detecting the temperature sensing circuit of the operating temperature of LED；Corresponding driving current is exported for the pwm signal according to input to drive the driving circuit of LED operation；Input terminal connect with temperature sensor, the controller of the control terminal connection of output end and driving circuit, for exporting pwm signal corresponding with operating temperature according to preset temperature duty ratio corresponding relationship, in order to which driving circuit driving LED operation is in safe temperature range, wherein, the corresponding duty ratio of higher operating temperature is less than the corresponding duty ratio of lower operating temperature；For the power module for controller and drive circuitry.As it can be seen that the operating temperature that the application automatically controls LED makes its work in safe temperature range, the loss late of light output is reduced, maintains the self performance of material as far as possible, to extend the lumen depreciation of LED, and has modified the color temperature shift of LED.
Description
Technical field
The utility model relates to thermal management technology fields, more particularly to the heat management device and system of a kind of LED.
Background technique
Currently, since LED (Light Emitting Diode, light emitting diode) has high brightness, environmental protection and energy conservation etc.
Advantage makes LED lighting technology be widely used in every field.But as the long-time of LED uses, itself operating temperature compared with
Height will lead to light output and slowly lose and the degradation of material, to influence the lumen depreciation and color temperature shift of LED.It is existing
Have in technology, generally use fan cooling or heat dissipation performance is improved using highly heat-conductive material, still, both thermal management algorithms are only
The lumen depreciation of LED can be extended, with the increase of use time, the performance of LED material can still be deteriorated, thus can not repair
The color temperature shift of positive LED.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that those skilled in the art needs to solve at present
The problem of.
Utility model content
The purpose of the utility model is to provide the heat management device of LED a kind of and systems, can automatically control the work of LED
Temperature makes its work in safe temperature range, reduces the loss late of light output, maintains the self performance of material as far as possible, from
And the lumen depreciation of LED is extended, and have modified the color temperature shift of LED.
In order to solve the above technical problems, the utility model provides the heat management device of LED a kind of, including：
For detecting the temperature sensing circuit of the operating temperature of Light-emitting diode LED；
For exporting corresponding driving current according to the pulse width modulation (PWM) signal of input to drive the LED operation
Driving circuit；
The control that input terminal is connect with the temperature sensing circuit, output end is connect with the control terminal of the driving circuit
Device, for exporting pwm signal corresponding with the operating temperature according to preset temperature duty ratio corresponding relationship, in order to the drive
LED operation described in dynamic circuit drives is in safe temperature range, wherein the corresponding duty ratio of higher operating temperature is less than lower
The corresponding duty ratio of operating temperature；
For the power module for the controller and the drive circuitry.
Preferably, the temperature sensing circuit includes power supply, divider resistance and for by the operating temperature of the LED
It is converted into the thermistor of voltage value, wherein：
The output end of the power supply is connect with the first end of the divider resistance, the second end of the divider resistance with
The first end of the thermistor connects, the second end ground connection of the thermistor；
Then the controller includes：
For the voltage value to be converted into the A/D converter of the operating temperature.
Preferably, the temperature sensing circuit further includes the capacitor for circuit where stablizing, the anode point of the capacitor
It is not connect with the first end of the second end of the divider resistance and the thermistor, the cathode of the capacitor and temperature-sensitive electricity
The second end of resistance connects, common end grounding.
Preferably, which further includes connecting with the output end of the power module, for stablizing the control
The Voltage stabilizing module of the supply voltage of device and the driving circuit.
Preferably, the thermistor is specially negative temperature coefficient NTC thermistor.
Preferably, the controller is specially micro-control unit MCU.
In order to solve the above technical problems, the utility model additionally provides the heat management system of LED a kind of, including LED, also wrap
Include the heat management device of any of the above-described kind of LED.
Preferably, the LED includes the sub- LED group of multiple parallel connections, and every sub- LED group includes multiple concatenated sub- LED.
The utility model provides the heat management device of LED a kind of, including：For detecting the temperature of the operating temperature of LED
Detection circuit；Corresponding driving current is exported for the pwm signal according to input to drive the driving circuit of LED operation；Input
The controller that end connect with temperature sensor, the control terminal of output end and driving circuit connects is used for according to preset temperature duty
Pwm signal corresponding with operating temperature is exported than corresponding relationship, in order to which driving circuit driving LED operation is in safe temperature model
It encloses, wherein the corresponding duty ratio of higher operating temperature is less than the corresponding duty ratio of lower operating temperature；For for controller
And the power module of drive circuitry.
Compared with heat management mode in the prior art, the application uses the work of temperature sensing circuit detection LED first
Then temperature exports pwm signal corresponding with operating temperature to drive according to the temperature duty ratio corresponding relationship of setting by controller
Dynamic circuit, so that driving circuit be made to export corresponding driving current to drive LED operation in safe temperature range.Wherein, with
The duty ratio of the rising of LED operation temperature, the pwm signal of controller output reduces, and the driving current of driving circuit output reduces,
The operating power of LED reduces, to reduce the operating temperature of LED.As it can be seen that the application can automatically control the work temperature of LED
Degree makes its work in safe temperature range, reduces the loss late of light output, maintains the self performance of material as far as possible, thus
The lumen depreciation of LED is extended, and has modified the color temperature shift of LED.
The utility model additionally provides the heat management system of LED a kind of, having the same beneficial with above-mentioned heat management device
Effect.
Detailed description of the invention
It, below will be to the prior art and embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of the heat management device of LED provided by the utility model；
Fig. 2 is the structural schematic diagram of temperature sensing circuit shown in a kind of Fig. 1 provided by the utility model；
Fig. 3 is a kind of structural schematic diagram of Voltage stabilizing module provided by the utility model；
Fig. 4 (1) is a kind of structural schematic diagram of LED provided by the utility model；
Fig. 4 (2) is the structural schematic diagram of driving circuit shown in a kind of Fig. 1 provided by the utility model.
Specific embodiment
The core of the utility model is to provide the heat management device and system of a kind of LED, can automatically control the work of LED
Temperature makes its work in safe temperature range, reduces the loss late of light output, maintains the self performance of material as far as possible, from
And the lumen depreciation of LED is extended, and have modified the color temperature shift of LED.
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
Fig. 1 is please referred to, Fig. 1 is a kind of structural schematic diagram of the heat management device of LED provided by the utility model.
The heat management device includes：
For detecting the temperature sensing circuit 1 of the operating temperature of Light-emitting diode LED；
Corresponding driving current is exported for the pulse width modulation (PWM) signal according to input to drive the drive of LED operation
Dynamic circuit 2；
Input terminal connect with temperature sensing circuit 1, the controller 3 of the control terminal connection of output end and driving circuit 2, is used for
Pwm signal corresponding with operating temperature is exported according to preset temperature duty ratio corresponding relationship, in order to which driving circuit 2 drives LED
Work is in safe temperature range, wherein the corresponding duty ratio of higher operating temperature is less than that lower operating temperature is corresponding to be accounted for
Empty ratio；
For the power module 4 for controller 3 and the power supply of driving circuit 2.
It should be noted that default in the application sets in advance, it is only necessary to which setting is primary, unless according to reality
Situation needs to modify, and does not otherwise need to reset.
Specifically, it is contemplated that LED temperature when long-time uses is higher, and the light output that high temperature will lead to LED is slowly damaged
It loses, influences the lumen depreciation of LED；The material property of LED itself can also be deteriorated, and influence the color temperature shift of LED.So this Shen
It please improve the lumen depreciation and color temperature shift of LED by the way of controlling temperature.
The heat management device of the application includes temperature sensing circuit 1, driving circuit 2, controller 3 and power module 4.Power supply
Module 4 is that controller 3 and driving circuit 2 are powered, to realize temperature control.The operating temperature of known LED is by its operating power
It determines, when the internal structure of LED is fixed, the operating power of LED is by driving the driving current of the driving circuit 2 of its work to determine
It is fixed, and the driving current of LED is by PWM (Pulse Width Modulation, pulse width modulation) letter of input driving circuit 2
Number determine.
So the corresponding relationship of the operating temperature of LED and the duty ratio of pwm signal is arranged in the controller 3 of the application in advance,
Moreover, it is contemplated that the duty ratio to pwm signal is smaller, the driving current of driving circuit 2 is smaller, and the operating power of LED is smaller, LED
Temperature it is lower, so, when the temperature of LED increases, the duty ratio of pwm signal should reduce to reduce the temperature of LED, thus real
The control of existing temperature.That is, the operating temperature of LED is higher in temperature duty ratio corresponding relationship, corresponding pwm signal
Duty ratio it is smaller.
After LED operation, temperature sensing circuit 1 can detect the operating temperature of LED, then according to the work of detection
Temperature determines duty ratio corresponding with the operating temperature from temperature duty ratio corresponding relationship, drives LED for subsequent drive circuit 2
Work lays the foundation.
When the operating temperature of LED increases, the corresponding duty of operating temperature after raising is smaller, after determining raising
After the corresponding duty ratio of operating temperature, driving circuit 2, which can correspond to, generates lesser driving current, makes the operating power of LED
Reduce to reduce the operating temperature of LED, to make LED operation in safe temperature range.As it can be seen that the application can automatically control
The operating temperature of LED makes its work in safe temperature range, reduces the loss late of light output, and the lumen for extending LED maintains
Rate；And the self performance of material is maintained as much as possible, have modified the color temperature shift of LED.
In addition, it is contemplated that LED is in the case where working long hours, and even if adjusting its operating temperature always, the operating temperature of LED
May continue rise, only uphill process some slowly, the operating temperature of LED rises to outside safe temperature range in order to prevent,
When temperature duty ratio corresponding relationship is arranged, the maximum working temperature of setting LED and lower limit work the controller 3 of the application first
Temperature, the mark temperature that maximum working temperature stops working as LED, lower working temperature is as LED since high temperature stops work
After work, the mark temperature of its start-up operation is waited.So the controller 3 of the application is also set up, lower working temperature is corresponding to be opened
The duty ratio of pwm signal when beginning work.
If maximum working temperature and lower working temperature is only arranged, operating temperature between the two and duty ratio are set as line
Sexual intercourse, then as the operating temperature of LED constantly changes, the duty ratio of pwm signal also can constantly change, and lead to the brightness of LED
Constantly adjustment, the experience effect of user are poor.So the controller 3 of the application is in maximum working temperature and lower working temperature
Between the one or more intermediate operating temperatures of setting, and according to the lesser principle of the corresponding duty ratio of higher operating temperature, if
The duty ratio of the corresponding pwm signal of intermediate operating temperature is set, so that the operating temperature of LED is in two adjacent intermediate operating temperatures
When variation, the brightness of LED will not be adjusted, and improve the experience effect of user.
Correspondingly, when the operating temperature of LED is equal to any intermediate operating temperature, the determination of controller 3 and work at present temperature
Corresponding pwm signal is spent, and driving current is correspondingly adjusted by driving circuit 2, so as to adjust the operating temperature of LED.
When the operating temperature of LED rises to maximum working temperature, illustrate that the operating temperature of LED arrived set peace
The upper limit of total temperature range, then corresponding duty ratio is 0, i.e., driving circuit 2 stops generating driving current, is stopped to control LED
It only works, until the operating temperature of LED drops to lower working temperature, the controller 3 of the application generates PWM when starting to work
Signal makes the corresponding driving current that generates of driving circuit 2 to drive LED to start to work.
The utility model provides the heat management device of LED a kind of, including：For detecting the temperature of the operating temperature of LED
Detection circuit；Corresponding driving current is exported for the pwm signal according to input to drive the driving circuit of LED operation；Input
The controller that end connect with temperature sensor, the control terminal of output end and driving circuit connects is used for according to preset temperature duty
Pwm signal corresponding with operating temperature is exported than corresponding relationship, in order to which driving circuit driving LED operation is in safe temperature model
It encloses, wherein the corresponding duty ratio of higher operating temperature is less than the corresponding duty ratio of lower operating temperature；For for controller
And the power module of drive circuitry.
Compared with heat management mode in the prior art, the application uses the work of temperature sensing circuit detection LED first
Then temperature exports pwm signal corresponding with operating temperature to drive according to the temperature duty ratio corresponding relationship of setting by controller
Dynamic circuit, so that driving circuit be made to export corresponding driving current to drive LED operation in safe temperature range.Wherein, with
The duty ratio of the rising of LED operation temperature, the pwm signal of controller output reduces, and the driving current of driving circuit output reduces,
The operating power of LED reduces, to reduce the operating temperature of LED.As it can be seen that the application can automatically control the work temperature of LED
Degree makes its work in safe temperature range, reduces the loss late of light output, maintains the self performance of material as far as possible, thus
The lumen depreciation of LED is extended, and has modified the color temperature shift of LED.
On the basis of the above embodiments：
Referring to figure 2., Fig. 2 is the structural schematic diagram of temperature sensing circuit shown in a kind of Fig. 1 provided by the utility model.
As a kind of preferred embodiment, temperature sensing circuit 1 includes power supply, divider resistance R1 and is used for LED
Operating temperature be converted into the thermistor R2 of voltage value, wherein：
The output end of power supply is connect with the first end of divider resistance R1, the second end and thermistor of divider resistance R1
The first end of R2 connects, the second end ground connection of thermistor R2；
Then controller 3 includes：
For voltage value to be converted into the A/D converter of operating temperature.
Specifically, the temperature sensing circuit 1 in the application includes power supply, divider resistance R1 and thermistor R2.Heat
Quick resistance R2 is sensitive to temperature change, different resistance values is shown at a temperature of different, and then change the voltage value at both ends, temperature
Degree detection circuit 1 will pass through the operating temperature of the voltage value reflection LED of thermistor R2, then controller 3 includes A/D converter,
The voltage value of thermistor R2 can be converted into operating temperature, in order to subsequent progress temperature control zone reason.
As a kind of preferred embodiment, temperature sensing circuit 1 further includes the capacitor C, capacitor C for circuit where stablizing
Anode connect respectively with the first end of the second end of divider resistance R1 and thermistor R2, the cathode and thermistor of capacitor C
The second end of R2 connects, common end grounding.
Further, in order to improve the stability of circuit, it is connected in parallel with a capacitor C at the both ends of thermistor R2, makes to detect
Operating temperature value it is more accurate.
As a kind of preferred embodiment, which further includes connecting with the output end of power module 4, for steady
Determine the Voltage stabilizing module of the supply voltage of controller 3 and driving circuit 2.
Further, which further includes Voltage stabilizing module, for the power supply of stability controller 3 and driving circuit 2
Voltage improves the stability and reliability of device.Referring to figure 3., Fig. 3 is a kind of Voltage stabilizing module provided by the utility model
Structural schematic diagram.
As a kind of preferred embodiment, thermistor R2 is specially negative temperature coefficient NTC thermistor.
Specifically, the thermistor R2 in the application can be NTC (Negative Temperature
Coefficient, negative temperature coefficient) thermistor, NTC thermistor is that a kind of resistance value increases and reduced sensing with temperature
Device resistance.As for the specific choice of thermistor R2, the application is not particularly limited herein.
As a kind of preferred embodiment, controller 3 is specially micro-control unit MCU.
Specifically, the controller 3 in the application can be but be not limited only to MCU (Micro Control Unit, microcontroller
Unit), the application is not particularly limited herein.
The utility model additionally provides the heat management system of LED a kind of, including LED, further includes the heat of any of the above-described kind of LED
Managing device.
As a kind of preferred embodiment, LED includes the sub- LED group of multiple parallel connections, and every sub- LED group includes multiple series connection
Sub- LED.
Specifically, the LED in the application may include the sub- LED group of multiple parallel connections, and every sub- LED group includes multiple series connection
Sub- LED.
LED in the application can also only include a sub- LED group, referring to figure 4. (1) and Fig. 4 (2), and Fig. 4 (1) is this
A kind of structural schematic diagram for LED that utility model provides；Fig. 4 (2) is driving circuit shown in a kind of Fig. 1 provided by the utility model
Structural schematic diagram.In the sub- LED group, the anode positioned at the sub- LED of head end is connect with the port of driving circuit mark LED+,
Cathode positioned at the sub- LED of tail end is connect with the port of driving circuit mark LED-, and driving circuit indicates port and the control of IN
Device connection, to complete the drive control of LED.
If the LED in the application includes the sub- LED group of multiple parallel connections, the heat management system of the application includes corresponding
Multiple driving circuits as shown in Fig. 4 (2), as the specific choice of LED and driving circuit, the application is not done particularly herein
It limits.
Other introductions for heat management system, please refer to above-mentioned heat management device embodiment, the application repeats no more.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (8)
1. a kind of heat management device of LED, which is characterized in that including：
For detecting the temperature sensing circuit of the operating temperature of Light-emitting diode LED；
Corresponding driving current is exported for the pulse width modulation (PWM) signal according to input to drive the drive of the LED operation
Dynamic circuit；
The controller that input terminal is connect with the temperature sensing circuit, output end is connect with the control terminal of the driving circuit is used
In exporting pwm signal corresponding with the operating temperature according to preset temperature duty ratio corresponding relationship, in order to the driving electricity
Road drives the LED operation in safe temperature range, wherein the corresponding duty ratio of higher operating temperature is less than lower work
The corresponding duty ratio of temperature；
For the power module for the controller and the drive circuitry.
2. the heat management device of LED as described in claim 1, which is characterized in that the temperature sensing circuit includes power supply electricity
Source, divider resistance and the thermistor for the operating temperature of the LED to be converted into voltage value, wherein：
The output end of the power supply is connect with the first end of the divider resistance, the second end of the divider resistance with it is described
The first end of thermistor connects, the second end ground connection of the thermistor；
Then the controller includes：
For the voltage value to be converted into the A/D converter of the operating temperature.
3. the heat management device of LED as claimed in claim 2, which is characterized in that the temperature sensing circuit further includes being used for
The capacitor of circuit where stablizing, the anode of the capacitor respectively with the second end of the divider resistance and the thermistor the
One end connection, the cathode of the capacitor are connect with the second end of the thermistor, common end grounding.
4. the heat management device of LED as claimed in claim 3, which is characterized in that the heat management device further includes and the electricity
The output end connection of source module, supply voltage for stablizing the controller and the driving circuit Voltage stabilizing module.
5. the heat management device of LED as claimed in claim 3, which is characterized in that the thermistor is specially negative temperature system
Number NTC thermistor.
6. the heat management device of LED as claimed in claim 5, which is characterized in that the controller is specially micro-control unit
MCU。
7. a kind of heat management system of LED, which is characterized in that further include as claimed in any one of claims 1 to 6 including LED
The heat management device of LED.
8. the heat management system of LED as claimed in claim 7, which is characterized in that the LED includes the sub- LED of multiple parallel connections
Group, every sub- LED group include multiple concatenated sub- LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820607394.0U CN208143540U (en) | 2018-04-25 | 2018-04-25 | A kind of heat management device and system of LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820607394.0U CN208143540U (en) | 2018-04-25 | 2018-04-25 | A kind of heat management device and system of LED |
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| Publication Number | Publication Date |
|---|---|
| CN208143540U true CN208143540U (en) | 2018-11-23 |
Family
ID=64311196
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820607394.0U Expired - Fee Related CN208143540U (en) | 2018-04-25 | 2018-04-25 | A kind of heat management device and system of LED |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108495418A (en) * | 2018-04-25 | 2018-09-04 | 广东工业大学 | A kind of thermal management algorithm and device of LED |
| CN110621105A (en) * | 2019-09-23 | 2019-12-27 | 深圳中科维优科技有限公司 | Temperature color drift real-time correction device and method for LED multi-primary-color lamp |
| CN111885783A (en) * | 2020-07-30 | 2020-11-03 | 江苏博度信息科技有限公司 | Power supply device and lighting system |
-
2018
- 2018-04-25 CN CN201820607394.0U patent/CN208143540U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108495418A (en) * | 2018-04-25 | 2018-09-04 | 广东工业大学 | A kind of thermal management algorithm and device of LED |
| CN110621105A (en) * | 2019-09-23 | 2019-12-27 | 深圳中科维优科技有限公司 | Temperature color drift real-time correction device and method for LED multi-primary-color lamp |
| CN110621105B (en) * | 2019-09-23 | 2021-11-09 | 深圳中科维优科技有限公司 | Temperature color drift real-time correction device and method for LED multi-primary-color lamp |
| CN111885783A (en) * | 2020-07-30 | 2020-11-03 | 江苏博度信息科技有限公司 | Power supply device and lighting system |
| CN111885783B (en) * | 2020-07-30 | 2022-11-15 | 华灯高节能技术(江苏)有限公司 | Power supply device and lighting system |
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Granted publication date: 20181123 Termination date: 20200425 |