CN102072426B - LED (Light Emitting Diode) lighting device and drive method thereof - Google Patents
LED (Light Emitting Diode) lighting device and drive method thereof Download PDFInfo
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- CN102072426B CN102072426B CN201010545271A CN201010545271A CN102072426B CN 102072426 B CN102072426 B CN 102072426B CN 201010545271 A CN201010545271 A CN 201010545271A CN 201010545271 A CN201010545271 A CN 201010545271A CN 102072426 B CN102072426 B CN 102072426B
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Abstract
The invention discloses an LED lighting device. The device comprises an LED lamp, an optical sensor and an adjustable power supply. The adjustable power supply provides the LED lamp with a drive current. The optical sensor detects the ambient brightness and sends a control signal to the adjustable power supply according to the detected ambient brightness, and the drive current size is adjusted by the adjustable power supply according to the control signal, so that light sent by the LED lamp can meet the requirement on the ambient brightness under the condition of avoiding energy waste. Meanwhile, the invention further discloses a drive method of the LED lighting device. In the method, the ambient brightness is detected by using the optical sensor, and the control signal is sent to the adjustable power supply according to the detected ambient brightness, so that the drive current size can be adjusted by the adjustable power supply according to the control signal, and the light sent by the LED lamp can meet the requirement on the ambient brightness under the condition of avoiding energy waste. The method is simple and practical.
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 convert electricity into light.The structure of LED mainly is made up of semiconductor PN, electrode and optical system.
The luminescence mechanism of LED is: the terminal voltage of PN junction constitutes 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,, constitute injection to P district minority carrier so a large amount of electronics can occur to the diffusion of P district; The energy that hole-recombination on these electronics and the valence band, compound tense obtain discharges with the form of luminous energy.
Along with the fast development of LED technology, the LED product category is enriched constantly, and LED shows great potential at lighting field.LED has advantage than other luminescent devices:
(1) long working life, the brightness half-life of LED can reach 100,000 hours usually; As substituting traditional lamps for vehicle with LED, its life-span will have the advantages that need not repair and change all the life much larger than the life-span of car body so;
(2) power consumption is low, and LED is a kind of operating on low voltage device, and therefore under equal brightness, power consumption is minimum, can cut down the consumption of energy in a large number;
(3) response time fast, LED generally can respond in a few tens of milliseconds, adopts LED to make under the fast state of high-mount stop lamp of automobile the security that has improved automobile greatly;
(4) little, in light weight, the anti-resistance of volume, this is the inherent characteristics of semiconductor solid state device;
(5) it is big to be easy to light modulation, toning, controllability, and LED can also can realize the variation and the adjusting of color through the configuration of different wave length LED through flowing through change in current control brightness; Therefore, with light source or the display screen that LED forms, be easy to reach the needs of various application through Electronic Control.
LED light fixture in the market all adopts constant-current source to drive, and the LED luminous intensity is constant, can not change with ambient brightness, and in this case, when ambient brightness was brighter, the light intensity effect that the LED lamp sends was also not obvious, causes energy waste; When ambient brightness was dark, the light intensity that the LED lamp sends can not satisfy the brightness of environmental requirement again.
Therefore, how to make LED light can satisfy the ambient brightness requirement and don't cause energy waste, become the technical problem that industry is needed solution at present badly.
Summary of the invention
LED light the object of the present invention is to provide the driving method of a kind of LED lighting device and this device, so that can satisfy the ambient brightness requirement and don't cause energy waste.
For addressing the above problem, the present invention proposes a kind of LED lighting device, and this device comprises:
The LED light fixture;
Optical sensor, acquisition environment brightness is sent control signal according to the ambient brightness that detects;
Regulated power supply provides drive current for said LED light fixture, and receives said control signal, according to the size of said control signal adjustment drive current.
Optional, said optical sensor is arranged near the said LED light fixture, and passes through wired connection with said regulated power supply.
Optional, said optical sensor is away from said LED light fixture, and transmits control signal to said regulated power supply through wireless mode.
Optional, said optical sensor is digital optical sensor, said control signal is a data signal.
Optional, said optical sensor is analog optical sensor, said control signal is an analog signal; At this moment, said LED lighting device also comprises A/D convertor circuit, and said A/D convertor circuit links to each other with said regulated power supply, and said A/D convertor circuit receives said analog signal, is data signal with said analog signal conversion, and sends to said regulated power supply.
Simultaneously, for addressing the above problem, the present invention also proposes a kind of driving method of above-mentioned LED lighting device, and this method comprises the steps:
Said regulated power supply provides drive current, said LED lamp luminescence for said LED light fixture;
Said light sensor probes ambient brightness sends control signal according to the ambient brightness that detects;
Said regulated power supply receives said control signal, according to the size of said control signal adjustment drive current.
Optional, said optical sensor is arranged near the said LED light fixture, and passes through wired connection with said regulated power supply.
Optional, said optical sensor is away from said LED light fixture, and transmits control signal to said regulated power supply through wireless mode.
Optional, said optical sensor is digital optical sensor, said control signal is a data signal.
Optional, said optical sensor is analog optical sensor, said control signal is an analog signal; At this moment, said LED lighting device also comprises A/D convertor circuit, and said A/D convertor circuit links to each other with said regulated power supply, and said A/D convertor circuit receives said analog signal, is data signal with said analog signal conversion, and sends to said regulated power supply.
Compared with prior art, LED lighting device provided by the invention comprises LED light fixture, optical sensor and regulated power supply, and said regulated power supply provides drive current for said LED light fixture; Said light sensor probes ambient brightness sends control signal according to the ambient brightness that detects and gives said regulated power supply, and said regulated power supply is according to the size of said control signal adjustment drive current; Thereby the light that the LED light fixture is sent can satisfy ambient brightness requires and don't causes energy waste; The driving method of LED lighting device provided by the invention utilizes the light sensor probes ambient brightness; Send control signal according to the ambient brightness that detects and give said regulated power supply; Thereby make said regulated power supply can adjust the size of drive current according to the brightness of surrounding environment; The light that said LED light fixture is sent can satisfy ambient brightness and require and don't cause energy waste, and this method is simple and convenient.
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 LED lighting device that Fig. 2 provides for second embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the LED lighting device of the present invention's proposition and the driving method of this device are done further explain.According to following explanation and claims, advantage of the present invention and characteristic will be clearer.What need explanation is, accompanying drawing all adopts the form of simplifying very much and all uses non-ratio accurately, only is used for conveniently, 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, optical sensor and regulated power supply; The brightness situation of said light sensor probes environment is sent control signal according to the ambient brightness that detects and is given said regulated power supply, and said regulated power supply is according to the size of said its output current of control signal adjustment; Thereby the light that the LED light fixture is sent can satisfy ambient brightness requires and don't causes energy waste; Simultaneously; The present invention also provides a kind of driving method of LED lighting device; This method utilizes light sensor probes to survey the brightness situation of environment, sends control signal according to the ambient brightness that detects and gives said regulated power supply, and said regulated power supply is according to the size of said its output current of control signal adjustment; Thereby the light that the LED light fixture is sent can satisfy ambient brightness requires and don't causes energy waste.
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:
Regulated power supply 103 provides drive current for said LED light fixture 101, and receives said control signal, according to the size of said control signal adjustment drive current; Particularly, said LED light fixture 101 comprises a plurality of LED lamp pearls, and said regulated power supply 103 provides drive current for said LED lamp pearl.
Further, said optical sensor 102 is arranged near the said LED light fixture 101, and passes through wired connection with said regulated power supply 103; Particularly, said optical sensor 102 is arranged on outside the lampshade of said LED light fixture 101, and passes through wired connection with said regulated power supply 103.
Further, said optical sensor 102 is away from said LED light fixture 101, and transmits control signal to said regulated power supply 103 through wireless mode.
Because said regulated power supply 103 can be regulated the size of output current according to the brightness situation of environment, requires and don't cause energy waste thereby the light that makes said LED light fixture 101 send can satisfy ambient brightness.
Embodiment 2
Please refer to Fig. 2, the structural representation of the LED lighting device that Fig. 2 provides for second embodiment of the invention, as shown in Figure 2, the LED lighting device that second embodiment of the invention provides comprises:
A/D convertor circuit 203 receives said analog signal, is data signal with said analog signal conversion, and sends;
Regulated power supply 204 links to each other with said A/D convertor circuit 203, and said regulated power supply 204 provides drive current for said LED light fixture 201, and receives the data signal that said A/D convertor circuit 203 sends, according to the size of said data signal adjustment drive current; Particularly, said LED light fixture 201 comprises a plurality of LED lamp pearls, and said regulated power supply 204 provides drive current for said LED lamp pearl.
Further, said optical sensor 202 is arranged near the said LED light fixture 201, and passes through wired connection with said A/D convertor circuit 203; Particularly, said optical sensor 202 is arranged on outside the lampshade of said LED light fixture 201, and passes through wired connection with said A/D convertor circuit 203.
Further, said optical sensor 102 is away from said LED light fixture 201, and transmits control signal to said A/D convertor circuit 203 through wireless mode.
Because said regulated power supply 204 can be regulated the size of output current according to the brightness situation of environment, requires and don't cause energy waste thereby the light that makes said LED light fixture 201 send can satisfy ambient brightness.
In addition, the embodiment of the invention also proposes a kind of driving method of above-mentioned LED lighting device, and this method comprises the steps:
Said regulated power supply provides drive current, said LED lamp luminescence for said LED light fixture;
Said light sensor probes ambient brightness sends control signal according to the ambient brightness that detects;
Said regulated power supply receives said control signal, according to the size of said control signal adjustment drive current.
Further, said optical sensor is arranged near the said LED light fixture, and passes through wired connection with said regulated power supply.
Further, said optical sensor is away from said LED light fixture, and transmits control signal to said regulated power supply through wireless mode.
Further, said optical sensor is digital optical sensor, and said control signal is a data signal.
Further, said optical sensor is analog optical sensor, and said control signal is an analog signal; At this moment, said LED lighting device also comprises A/D convertor circuit, and said A/D convertor circuit links to each other with said regulated power supply, and said A/D convertor circuit receives said analog signal, is data signal with said analog signal conversion, and sends to said regulated power supply.
In sum, the invention provides a kind of LED lighting device, this device comprises LED light fixture, optical sensor and regulated power supply, and said regulated power supply provides drive current for said LED light fixture; Said light sensor probes ambient brightness sends control signal according to the ambient brightness that detects and gives said regulated power supply, and said regulated power supply is according to the size of said control signal adjustment drive current; Thereby the light that the LED light fixture is sent can satisfy ambient brightness requires and don't causes energy waste; Simultaneously; The present invention also provides a kind of driving method of LED lighting device; This method is utilized the light sensor probes ambient brightness, sends control signal according to the ambient brightness that detects and gives said regulated power supply, thereby make said regulated power supply can adjust the size of drive current according to the brightness of surrounding environment; The light that said LED light fixture is sent can satisfy ambient brightness and require and don't cause energy waste, and this method is simple and convenient.
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, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1. a LED lighting device is characterized in that, comprising:
The LED light fixture;
Optical sensor, acquisition environment brightness is sent control signal according to the ambient brightness that detects;
Regulated power supply provides drive current for said LED light fixture, and receives said control signal, according to the size of said control signal adjustment drive current;
Wherein, said optical sensor is away from said LED light fixture, and transmits control signal to said regulated power supply through wireless mode.
2. LED lighting device as claimed in claim 1 is characterized in that, said optical sensor is digital optical sensor, and said control signal is a data signal.
3. LED lighting device as claimed in claim 1 is characterized in that, said optical sensor is analog optical sensor, and said control signal is an analog signal; At this moment, said LED lighting device also comprises A/D convertor circuit, and said A/D convertor circuit links to each other with said regulated power supply, and said A/D convertor circuit receives said analog signal, is data signal with said analog signal conversion, and sends to said regulated power supply.
4. the driving method of a LED lighting device as claimed in claim 1 is characterized in that, comprises the steps:
Said regulated power supply provides drive current, said LED lamp luminescence for said LED light fixture;
Said light sensor probes ambient brightness sends control signal according to the ambient brightness that detects;
Said regulated power supply receives said control signal, according to the size of said control signal adjustment drive current;
Wherein, said optical sensor is away from said LED light fixture, and transmits control signal to said regulated power supply through wireless mode.
5. the driving method of LED lighting device as claimed in claim 4 is characterized in that, said optical sensor is away from said LED light fixture, and transmits control signal to said regulated power supply through wireless mode.
6. the driving method of LED lighting device as claimed in claim 4 is characterized in that, said optical sensor is digital optical sensor, and said control signal is a data signal.
7. the driving method of LED lighting device as claimed in claim 4 is characterized in that, said optical sensor is analog optical sensor, and said control signal is an analog signal; At this moment, said LED lighting device also comprises A/D convertor circuit, and said A/D convertor circuit links to each other with said regulated power supply, and said A/D convertor circuit receives said analog signal, is data signal with said analog signal conversion, and sends to said regulated power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010545271A CN102072426B (en) | 2010-11-15 | 2010-11-15 | LED (Light Emitting Diode) lighting device and drive method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010545271A CN102072426B (en) | 2010-11-15 | 2010-11-15 | LED (Light Emitting Diode) lighting device and drive method thereof |
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| Publication Number | Publication Date |
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| CN102072426A CN102072426A (en) | 2011-05-25 |
| CN102072426B true CN102072426B (en) | 2012-08-29 |
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| CN201010545271A Expired - Fee Related CN102072426B (en) | 2010-11-15 | 2010-11-15 | LED (Light Emitting Diode) lighting device and drive method thereof |
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| CN114096046A (en) * | 2021-11-18 | 2022-02-25 | 航天信息股份有限公司 | Automatic adjusting method, device and system for equipment illumination |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1955795A (en) * | 2005-10-28 | 2007-05-02 | 三星电子株式会社 | Display apparatus having led backlight and brightness adjusting method for the same |
| CN101467490A (en) * | 2006-06-09 | 2009-06-24 | 飞利浦拉米尔德斯照明设备有限责任公司 | Led backlight for LCD with color uniformity recalibration over lifetime |
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2010
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1955795A (en) * | 2005-10-28 | 2007-05-02 | 三星电子株式会社 | Display apparatus having led backlight and brightness adjusting method for the same |
| CN101467490A (en) * | 2006-06-09 | 2009-06-24 | 飞利浦拉米尔德斯照明设备有限责任公司 | Led backlight for LCD with color uniformity recalibration over lifetime |
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| CN102072426A (en) | 2011-05-25 |
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Granted publication date: 20120829 Termination date: 20201115 |