CN102128368B - LED illumination device and drive method thereof - Google Patents
LED illumination device and drive method thereof Download PDFInfo
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- CN102128368B CN102128368B CN2010105310082A CN201010531008A CN102128368B CN 102128368 B CN102128368 B CN 102128368B CN 2010105310082 A CN2010105310082 A CN 2010105310082A CN 201010531008 A CN201010531008 A CN 201010531008A CN 102128368 B CN102128368 B CN 102128368B
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Abstract
The invention discloses a light emitting diode (LED) illumination device, which comprises an LED lamp, a temperature sensor and an adjustable power supply, wherein the temperature sensor is used for detecting the operating temperature of an LED lamp bead in the LED lamp and transmitting a control signal when the detected temperature reaches the maximum permissible temperature value; the adjustable power supply is used for adjusting the quantity of output current according to the control signal; therefore, the temperature increase of the LED lamp bead due to over-high current supplied by the power supply can be prevented, and the service life of the LED lamp bead is prolonged. Simultaneously, the invention also discloses a drive method for the LED illumination device. The method comprises the following steps of: detecting the operating temperature of the LED lamp bead in the LED lamp by using the temperature sensor; transmitting the control signal when the detected temperature reaches the maximum permissible temperature value; and adjusting the quantity of the output current according to the control signal by using the adjustable power supply so as to prevent the temperature increase of the LED lamp bead due to over-high current supplied by the power supply and prolong the service life of the LED lamp bead.
Description
Technical field
The present invention relates to the LED lighting technical field, relate in particular to the driving method of a kind of LED lighting device and this device.
Background technology
Light emitting diode (LED, Light Emitting Diode) is a kind of semiconductor solid luminescence device, and it utilizes semiconductor PN as luminescent material, can directly electricity be converted to light.The structure of LED mainly is comprised of semiconductor PN, electrode and optical system.Led light source since have high energy-conservation, the life-span long, be beneficial to the advantage such as environmental protection, and becomes the focus of present research, be widely used in the lighting, and be considered to light source of future generation.
The luminescence mechanism of LED is: the terminal voltage of PN junction consists of certain potential barrier, and when adding forward bias voltage, potential barrier descends, and the majority carrier in P district and N district spreads to the other side; Because electron mobility is more much bigger than hole mobility, so a large amount of electronics can occur to the diffusion of P district, consist of the injection to P district minority carrier; The energy that hole-recombination on these electronics and the valence band, compound tense obtain discharges with the form of luminous energy.
Yet, be not that the compound carrier of every a pair of electron-hole pair all can produce photon, because the PN junction of LED is extrinsic semiconductor, exist the factors such as material quality defective, dislocation, and technologic many disadvantages, thereby can produce the problems such as impurity ionization, intrinsic excitation scattering and lattice scattering, can be with lattice electron or ion-exchange energy when making electronics transit to ground state from excitation state and produce radiationless transition, namely do not produce photon, this part energy do not convert luminous energy to and the energy transform into heat energy loss at PN junction, junction temperature is raise.Under the little electric current, the LED temperature rise is not obvious; When electric current was larger, the temperature rise of LED was more remarkable.
If the temperature of LED is higher, its dominant wavelength will red shift, and the brightness meeting descends, uniformity of luminance, uniformity variation; Usually, when the temperature of LED rose to 120 ℃ of left and right sides, its luminous efficiency was lower than 10%.The dominant wavelength red shift of so-called LED refers to when temperature raises the phenomenon that the emission wavelength of LED is elongated.
The forward current of LED luminosity and PN junction is approximated to ratio; Electric current increases, and luminosity is approximate the increase also.Luminosity is also relevant with environment temperature in addition, and when environment temperature was high, combined efficiency descended, and luminous intensity reduces.
In addition, can produce light decay when LED works long hours, cause agingly, along with the LED working time increases, the PN junction junction temperature constantly raises, aging speed that can faster devices, thus reduce the brightness of LED.
In the LED lighting field, single ledly be commonly referred to LED lamp pearl, and the LED light fixture generally includes a plurality of LED lamp pearls.At present, LED light fixture great majority are driven by constant-current source, and LED lamp pearl on the described LED light fixture normally works asynchronously, and namely or all luminous, or all extinguish.
Yet there is following problem in existing LED light fixture: aging along with LED, drive current will be greater than the luminous required electric currents of LED device, thereby can cause device junction temperature to raise, and the faster devices aging speed makes the LED lost of life; And the meeting consume additional power, cause the wasting of resources, be unfavorable for environmental protection.
Therefore, how to prolong LED life-span, economize on resources, become the technical problem that industry is needed solution at present badly.
Summary of the invention
The object of the present invention is to provide the driving method of a kind of LED lighting device and this device, with life-span of prolonging LED, economize on resources.
For addressing the above problem, the present invention proposes a kind of LED lighting device, and this device comprises:
The LED light fixture, described LED light fixture comprises the luminous path of a plurality of parallel connections, is provided with a LED lamp pearl on described each luminous path;
A plurality of temperature sensors, wherein, each temperature sensor and described each LED lamp bead seal are fitted together; Described each temperature sensor is surveyed the operating temperature of a LED lamp pearl that is packaged together with it, when the temperature that detects reaches the maximum permissible temperature value, sends control signal;
Regulated power supply provides electric current for described luminous path, and receives described control signal, adjusts size of current according to described control signal.
Optionally, also be provided with the 2nd LED lamp pearl and short circuit path on the part or all of luminous path in the luminous path of described a plurality of parallel connections, described the 2nd LED lamp pearl and described LED lamp pearl series winding; Described short circuit path is connected in parallel on described the 2nd LED lamp pearl two ends, and perhaps an end of described short circuit path is connected between a described LED lamp pearl and described the 2nd LED lamp pearl, its other end ground connection; Be provided with switch element on the described short circuit path, when the luminosity of a described LED lamp pearl reaches the ambient brightness demand, described switch element conducting, described the 2nd LED lamp pearl is extinguished; When the luminosity of a described LED lamp pearl during less than the ambient brightness demand, described switch element disconnects, and described the 2nd LED lamp pearl is luminous.
Optionally, described switch element is knife switch.
Optionally, described switch element is NMOS pipe, and the drain electrode of described NMOS pipe is connected between a described LED lamp pearl and described the 2nd LED lamp pearl, its source ground or be connected on the other end of described the 2nd LED lamp pearl.
Optionally, described temperature sensor is digital temperature sensor, and described control signal is data signal.
Optionally, described temperature sensor is analog temperature sensor, and described control signal is analog signal; At this moment, described LED lighting device also comprises A/D convertor circuit, and described A/D convertor circuit links to each other with described regulated power supply, and described A/D convertor circuit receives described analog signal, is data signal with described analog signal conversion, and sends to described regulated power supply.
Optionally, described maximum permissible temperature value is 80 ℃～120 ℃.
Simultaneously, for addressing the above problem, the present invention also proposes a kind of driving method of above-mentioned LED lighting device, and the method comprises the steps:
Described regulated power supply provides electric current for described luminous path, and a described LED lamp pearl is luminous;
Described each temperature sensor is surveyed the operating temperature of a LED lamp pearl that is packaged together with it, when the temperature that detects reaches the maximum permissible temperature value, sends control signal;
Described regulated power supply receives described control signal, adjusts size of current according to described control signal.
Optionally, also be provided with the 2nd LED lamp pearl and short circuit path on the part or all of luminous path in the luminous path of described a plurality of parallel connections, described the 2nd LED lamp pearl and described LED lamp pearl series winding; Described short circuit path is connected in parallel on described the 2nd LED lamp pearl two ends, and perhaps an end of described short circuit path is connected between a described LED lamp pearl and described the 2nd LED lamp pearl, its other end ground connection; Be provided with switch element on the described short circuit path, when the luminosity of a described LED lamp pearl reaches the ambient brightness demand, described switch element conducting, described the 2nd LED lamp pearl is extinguished; When the luminosity of a described LED lamp pearl during less than the ambient brightness demand, described switch element disconnects, and described the 2nd LED lamp pearl is luminous.
Optionally, described switch element is knife switch.
Optionally, described switch element is NMOS pipe, and the drain electrode of described NMOS pipe is connected between a described LED lamp pearl and described the 2nd LED lamp pearl, its source ground or be connected on the other end of described the 2nd LED lamp pearl.
Optionally, described temperature sensor is digital temperature sensor, and described control signal is data signal.
Optionally, described temperature sensor is analog temperature sensor, and described control signal is analog signal; At this moment, described LED lighting device also comprises A/D convertor circuit, and described A/D convertor circuit links to each other with described regulated power supply, and described A/D convertor circuit receives described analog signal, is data signal with described analog signal conversion, and sends to described regulated power supply.
Optionally, described maximum permissible temperature value is 80 ℃～120 ℃.
The present invention makes it compared with prior art owing to adopting above technical scheme, has following advantage and good effect:
1) LED lighting device provided by the invention adopts regulated power supply to provide drive current for LED lamp pearl, this regulated power supply is according to the situation of the operating temperature of LED lamp pearl, the size of regulation output electric current, avoid the electric current that provides because of power supply to cause LED lamp pearl temperature to raise greater than the electric current of LED lamp pearl actual needs, thereby can prolong the life-span of LED lamp pearl, reduce simultaneously dissipated power;
2) LED lighting device provided by the invention, its LED light fixture comprise a LED lamp pearl and the 2nd LED lamp pearl, and when the luminosity of a described LED lamp pearl during less than the ambient brightness demand, described the 2nd LED lamp pearl is luminous; Thereby avoided to satisfy the problem of ambient brightness needs because the regulated power supply output current reduces to cause the brightness of described LED light fixture.
Description of drawings
The structural representation of the LED lighting device that Fig. 1 provides for first embodiment of the invention;
The structural representation of the luminous path of the LED light fixture that Fig. 2 provides for first embodiment of the invention;
The structural representation of the LED lighting device that Fig. 3 provides for second embodiment of the invention;
The structural representation of the luminous path of the LED light fixture that Fig. 4 provides for second embodiment of the invention;
The structural representation of the LED light fixture that Fig. 5 provides for the embodiment of the invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the LED lighting device of the present invention's proposition and the driving method of this device are described in further detail.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts very the form of simplifying and all uses non-accurately ratio, only is used for convenient, the purpose of the aid illustration embodiment of the invention lucidly.
Core concept of the present invention is, a kind of LED lighting device is provided, and this device comprises LED light fixture, temperature sensor and regulated power supply; Described temperature sensor is surveyed the operating temperature of the LED lamp pearl in the described LED light fixture, when the temperature that detects reaches the maximum permissible temperature value, send control signal to described regulated power supply, described regulated power supply is adjusted the size of its output current according to described control signal; Avoid the electric current that provides because of power supply to cause LED lamp pearl temperature to raise greater than the electric current of LED lamp pearl actual needs, thereby can prolong the life-span of LED lamp pearl; Simultaneously, the present invention also provides a kind of driving method of LED lighting device, the method utilizes temperature sensor to survey the operating temperature of the LED lamp pearl in the described LED light fixture, when the temperature that detects reaches the maximum permissible temperature value, send control signal to described regulated power supply, described regulated power supply is adjusted the size of its output current according to described control signal; Thereby avoided the electric current that provides because of power supply to cause LED lamp pearl temperature to raise greater than the electric current of LED lamp pearl actual needs, prolonged the life-span of LED lamp pearl.
Embodiment 1
Please refer to Fig. 1, the structural representation of the LED lighting device that Fig. 1 provides for first embodiment of the invention, as shown in Figure 1, the LED lighting device that first embodiment of the invention provides comprises:
The LED light fixture, described LED light fixture comprises the luminous path of a plurality of parallel connections, is provided with a LED lamp pearl 101 on described each luminous path;
A plurality of temperature sensors 102, wherein, each temperature sensor 102 is packaged together with described each LED lamp pearl 101; Described each temperature sensor 102 is surveyed the operating temperature of a LED lamp pearl 101 that is packaged together with it, when the temperature that detects reaches the maximum permissible temperature value, sends control signal; Wherein, described temperature sensor 102 is digital temperature sensor, and described control signal is data signal.
Regulated power supply 103 provides electric current for described luminous path, and receives described control signal, adjusts size of current according to described control signal.
Because described regulated power supply 103 can be according to the situation of the operating temperature of a described LED lamp pearl 101, the size of regulation output electric current, avoided the electric current that provides because of power supply to cause a described LED lamp pearl 101 temperature to raise greater than the electric current of a described LED lamp pearl 101 actual needs, thereby prolonged the life-span of a described LED lamp pearl 101, reduced simultaneously dissipated power.
Please continue with reference to figure 2, the structural representation of the luminous path of the LED light fixture that Fig. 2 provides for first embodiment of the invention, as shown in Figure 2, described LED light fixture comprises the luminous path (only illustrating three among the figure) of a plurality of parallel connections, be provided with a LED lamp pearl 101 on described each luminous path, and also be provided with the 2nd LED lamp pearl 110 and the short circuit path situation of the 2nd LED lamp pearl 110 and short circuit path (only illustrated among the figure to be provided with on the luminous path of part) on the part or all of luminous path in the luminous path of described a plurality of parallel connections, described the 2nd LED lamp pearl 110 and a described LED lamp pearl 101 series windings; Described short circuit path is connected in parallel on described the 2nd LED lamp pearl 110 two ends; Be provided with switch element on the described short circuit path, when the luminosity of a described LED lamp pearl 101 reaches the ambient brightness demand, described switch element conducting, described the 2nd LED lamp pearl 110 is extinguished; When the luminosity of a described LED lamp pearl 101 during less than the ambient brightness demand, described switch element disconnects, and described the 2nd LED lamp pearl 110 is luminous.
Wherein, described switch element is NMOS pipe 120, and the drain electrode of described NMOS pipe 120 is connected between a described LED lamp pearl 101 and described the 2nd LED lamp pearl 110, its source ground or be connected on the other end of described the 2nd LED lamp pearl 110.Described NMOS pipe 120 as the principle that switch uses is: by at its grid making alive, control its conducting or cut-off, thereby realize the on-off function of switch element.
Certainly, described switch element can also be knife switch, and is not limited to NMOS pipe 120.
And, the connected mode of described short circuit path is not limited to be connected in parallel on described the 2nd LED lamp pearl 110 two ends, can also connect as follows, namely an end of described short circuit path is connected between a described LED lamp pearl 101 and described the 2nd LED lamp pearl 110, its other end ground connection.
Because described LED light fixture comprises a LED lamp pearl 101 and the 2nd LED lamp pearl 110, when the luminosity of a described LED lamp pearl 101 during less than the ambient brightness demand, described the 2nd LED lamp pearl 110 is luminous; Thereby avoided to satisfy the problem of ambient brightness needs because regulated power supply 103 output currents reduce to cause the brightness of described LED light fixture.
Further, described maximum permissible temperature value is 80 ℃～120 ℃; This is because after the operating temperature of LED lamp pearl surpassed 80 ℃, device aging accelerated, its lost of life; When operating temperature reached 120 ℃, its lost of life was very obvious; Therefore, in order to make the life of LED lamp pearl, its operating temperature should be lower than 120 ℃, is preferably lower than 80 ℃.
Embodiment 2
Please refer to Fig. 3, the structural representation of the LED lighting device that Fig. 3 provides for second embodiment of the invention, as shown in Figure 3, the LED lighting device that second embodiment of the invention provides comprises:
The LED light fixture, described LED light fixture comprises the luminous path of a plurality of parallel connections, is provided with a LED lamp pearl 201 on described each luminous path;
A plurality of temperature sensors 202, wherein, each temperature sensor 202 is packaged together with described each LED lamp pearl 201; Described each temperature sensor 202 is surveyed the operating temperature of a LED lamp pearl 201 that is packaged together with it, when the temperature that detects reaches the maximum permissible temperature value, sends control signal; Wherein, described temperature sensor 202 is analog temperature sensor, and described control signal is analog signal;
A/D convertor circuit 203 receives described analog signal, is data signal with described analog signal conversion, and sends.
Regulated power supply 204 provides electric current for described luminous path, and receives the data signal that described A/D convertor circuit 203 sends, and adjusts size of current according to described data signal.
Because described regulated power supply 204 can be according to the situation of the operating temperature of a described LED lamp pearl 201, the size of regulation output electric current, avoided the electric current that provides because of power supply to cause a described LED lamp pearl 201 temperature to raise greater than the electric current of a described LED lamp pearl 201 actual needs, thereby prolonged the life-span of a described LED lamp pearl 201, reduced simultaneously dissipated power.
Please continue with reference to figure 4, the structural representation of the luminous path of the LED light fixture that Fig. 4 provides for second embodiment of the invention, as shown in Figure 4, described LED light fixture comprises the luminous path (only illustrating three among the figure) of a plurality of parallel connections, be provided with a LED lamp pearl 201 on described each luminous path, and also be provided with the 2nd LED lamp pearl 210 and the short circuit path situation of the 2nd LED lamp pearl 210 and short circuit path (only illustrated among the figure to be provided with on the luminous path of part) on the part or all of luminous path in the luminous path of described a plurality of parallel connections, described the 2nd LED lamp pearl 210 and a described LED lamp pearl 201 series windings; One end of described short circuit path is connected between a described LED lamp pearl 201 and described the 2nd LED lamp pearl 210, its other end ground connection; Be provided with switch element on the described short circuit path, when the luminosity of a described LED lamp pearl 201 reaches the ambient brightness demand, described switch element conducting, described the 2nd LED lamp pearl 210 is extinguished; When the luminosity of a described LED lamp pearl 201 during less than the ambient brightness demand, described switch element disconnects, and described the 2nd LED lamp pearl 210 is luminous.
Wherein, described switch element is knife switch 220, and one of described knife switch 220 terminates between a described LED lamp pearl 201 and described the 2nd LED lamp pearl 210, its other end ground connection.
Certainly, described switch element can also be managed for NMOS, and is not limited to knife switch 220.
And, the connected mode of described short circuit path is not limited to an end and is connected between a described LED lamp pearl 201 and described the 2nd LED lamp pearl 210, its other end ground connection can also connect as follows, and namely described short circuit path is connected in parallel on described the 2nd LED lamp pearl 210 two ends.
Because described LED light fixture comprises a LED lamp pearl 201 and the 2nd LED lamp pearl 210, when the luminosity of a described LED lamp pearl 201 during less than the ambient brightness demand, described the 2nd LED lamp pearl 210 is luminous; Thereby avoided to satisfy the problem of ambient brightness needs because regulated power supply 204 output currents reduce to cause the brightness of described LED light fixture.
Further, described maximum permissible temperature value is 80 ℃～120 ℃; This is because after the operating temperature of LED lamp pearl surpassed 80 ℃, device aging accelerated, its lost of life; When operating temperature reached 120 ℃, its lost of life was very obvious; Therefore, in order to make the life of LED lamp pearl, its operating temperature should be lower than 120 ℃, is preferably lower than 80 ℃.
Please continue with reference to figure 5, the structural representation of the LED light fixture that Fig. 5 provides for the embodiment of the invention, as shown in Figure 5, the LED light fixture that the embodiment of the invention provides comprises the fixedly electroluminescent lamp pearl that is comprised of a plurality of the first lamp pearls 200, and the optional electroluminescent lamp pearl that is formed by a plurality of the second lamp pearls 300, described fixedly electroluminescent lamp pearl is luminous when extraneous need for environment illumination, and when the brightness of described fixedly electroluminescent lamp pearl can not be satisfied the required brightness of external environment, described optional electroluminescent lamp pearl was luminous.
In addition, the embodiment of the invention also proposes a kind of driving method of above-mentioned LED lighting device, and the method comprises the steps:
Described regulated power supply provides electric current for described luminous path, and a described LED lamp pearl is luminous;
Described each temperature sensor is surveyed the operating temperature of a LED lamp pearl that is packaged together with it, when the temperature that detects reaches the maximum permissible temperature value, sends control signal;
Described regulated power supply receives described control signal, adjusts size of current according to described control signal.
Further, also be provided with the 2nd LED lamp pearl and short circuit path on the part or all of luminous path in the luminous path of described a plurality of parallel connections, described the 2nd LED lamp pearl and described LED lamp pearl series winding; Described short circuit path is connected in parallel on described the 2nd LED lamp pearl two ends, and perhaps an end of described short circuit path is connected between a described LED lamp pearl and described the 2nd LED lamp pearl, its other end ground connection; Be provided with switch element on the described short circuit path, when the luminosity of a described LED lamp pearl reaches the ambient brightness demand, described switch element conducting, described the 2nd LED lamp pearl is extinguished; When the luminosity of a described LED lamp pearl during less than the ambient brightness demand, described switch element disconnects, and described the 2nd LED lamp pearl is luminous.
Further, described switch element is knife switch.
Further, described switch element is NMOS pipe, and the drain electrode of described NMOS pipe is connected between a described LED lamp pearl and described the 2nd LED lamp pearl, its source ground or be connected on the other end of described the 2nd LED lamp pearl.
Further, described temperature sensor is digital temperature sensor, and described control signal is data signal.
Further, described temperature sensor is analog temperature sensor, and described control signal is analog signal; At this moment, described LED lighting device also comprises A/D convertor circuit, and described A/D convertor circuit links to each other with described regulated power supply, and described A/D convertor circuit receives described analog signal, is data signal with described analog signal conversion, and sends to described regulated power supply.
Further, described maximum permissible temperature value is 80 ℃～120 ℃.
In specific embodiments of the invention, described switch element is knife switch or NMOS pipe, yet should be realized that, according to actual conditions, described switch element can also have for other element of switching function, such as PMOS pipe, transmission gate, on-off circuit etc.
In sum, the invention provides a kind of LED lighting device, this device comprises LED light fixture, temperature sensor and regulated power supply; Described temperature sensor is surveyed the operating temperature of the LED lamp pearl in the described LED light fixture, when the temperature that detects reaches the maximum permissible temperature value, send control signal to described regulated power supply, described regulated power supply is adjusted the size of its output current according to described control signal; Avoid the electric current that provides because of power supply to cause LED lamp pearl temperature to raise greater than the electric current of LED lamp pearl actual needs, thereby can prolong the life-span of LED lamp pearl; Simultaneously, the present invention also provides a kind of driving method of LED lighting device, the method utilizes temperature sensor to survey the operating temperature of the LED lamp pearl in the described LED light fixture, when the temperature that detects reaches the maximum permissible temperature value, send control signal to described regulated power supply, described regulated power supply is adjusted the size of its output current according to described control signal; Thereby avoided the electric current that provides because of power supply to cause LED lamp pearl temperature to raise greater than the electric current of LED lamp pearl actual needs, prolonged the life-span of LED lamp pearl.
Obviously, those skilled in the art can carry out various changes and modification to invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. a LED lighting device is characterized in that, comprising:
The LED light fixture, described LED light fixture comprises the luminous path of a plurality of parallel connections, is provided with a LED lamp pearl on described each luminous path;
A plurality of temperature sensors, wherein, each temperature sensor and described each LED lamp bead seal are fitted together; Described each temperature sensor is surveyed the operating temperature of a LED lamp pearl that is packaged together with it, when the temperature that detects reaches the maximum permissible temperature value, sends control signal;
Regulated power supply provides electric current for described luminous path, and receives described control signal, adjusts size of current according to described control signal;
Wherein, also be provided with the 2nd LED lamp pearl and short circuit path on the part or all of luminous path in the luminous path of described a plurality of parallel connections, described the 2nd LED lamp pearl and described LED lamp pearl series winding; Described short circuit path is connected in parallel on described the 2nd LED lamp pearl two ends, and perhaps an end of described short circuit path is connected between a described LED lamp pearl and described the 2nd LED lamp pearl, its other end ground connection; Be provided with switch element on the described short circuit path, when the luminosity of a described LED lamp pearl reaches the ambient brightness demand, described switch element conducting, described the 2nd LED lamp pearl is extinguished; When the luminosity of a described LED lamp pearl during less than the ambient brightness demand, described switch element disconnects, and described the 2nd LED lamp pearl is luminous.
2. LED lighting device as claimed in claim 1 is characterized in that, described switch element is knife switch.
3. LED lighting device as claimed in claim 1, it is characterized in that, described switch element is NMOS pipe, and the drain electrode of described NMOS pipe is connected between a described LED lamp pearl and described the 2nd LED lamp pearl, its source ground or be connected on the other end of described the 2nd LED lamp pearl.
4. LED lighting device as claimed in claim 1 is characterized in that, described temperature sensor is digital temperature sensor, and described control signal is data signal.
5. LED lighting device as claimed in claim 1 is characterized in that, described temperature sensor is analog temperature sensor, and described control signal is analog signal; At this moment, described LED lighting device also comprises A/D convertor circuit, and described A/D convertor circuit links to each other with described regulated power supply, and described A/D convertor circuit receives described analog signal, is data signal with described analog signal conversion, and sends to described regulated power supply.
6. LED lighting device as claimed in claim 1 is characterized in that, described maximum permissible temperature value is 80 ℃～120 ℃.
7. the driving method of a LED lighting device as claimed in claim 1 is characterized in that, comprises the steps:
Described regulated power supply provides electric current for described luminous path, and a described LED lamp pearl is luminous;
Described each temperature sensor is surveyed the operating temperature of a LED lamp pearl that is packaged together with it, when the temperature that detects reaches the maximum permissible temperature value, sends control signal;
Described regulated power supply receives described control signal, adjusts size of current according to described control signal.
8. the driving method of LED lighting device as claimed in claim 7 is characterized in that, described switch element is knife switch.
9. the driving method of LED lighting device as claimed in claim 7, it is characterized in that, described switch element is NMOS pipe, and the drain electrode of described NMOS pipe is connected between a described LED lamp pearl and described the 2nd LED lamp pearl, its source ground or be connected on the other end of described the 2nd LED lamp pearl.
10. the driving method of LED lighting device as claimed in claim 7 is characterized in that, described temperature sensor is digital temperature sensor, and described control signal is data signal.
11. the driving method of LED lighting device as claimed in claim 7 is characterized in that, described temperature sensor is analog temperature sensor, and described control signal is analog signal; At this moment, described LED lighting device also comprises A/D convertor circuit, and described A/D convertor circuit links to each other with described regulated power supply, and described A/D convertor circuit receives described analog signal, is data signal with described analog signal conversion, and sends to described regulated power supply.
12. the driving method of LED lighting device as claimed in claim 7 is characterized in that, described maximum permissible temperature value is 80 ℃～120 ℃.
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| CN104730986A (en) * | 2015-03-19 | 2015-06-24 | 天津市中环三峰电子有限公司 | Ultraviolet lamp control circuit for adjusting power regularly |
| CN113314656B (en) * | 2021-05-24 | 2022-02-18 | 深圳市华拓照明有限公司 | Packaging method of packaging structure of high-light-transmission high-heat-dissipation type LED lamp strip |
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| CN101841961A (en) * | 2010-05-19 | 2010-09-22 | 北京中庆微数字设备开发有限公司 | LED control device with current and temperature monitoring function |
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