CN104125679A - Menu based table look-up selection type zero attenuation compensation integrated LED (Light Emitting Diode) driving power source - Google Patents
Menu based table look-up selection type zero attenuation compensation integrated LED (Light Emitting Diode) driving power source Download PDFInfo
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- CN104125679A CN104125679A CN201310157503.5A CN201310157503A CN104125679A CN 104125679 A CN104125679 A CN 104125679A CN 201310157503 A CN201310157503 A CN 201310157503A CN 104125679 A CN104125679 A CN 104125679A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention relates to a menu based table look-up selection type zero attenuation compensation integrated LED (Light Emitting Diode) driving power source. The LED driving power source which is connected with a computer and an LED respectively comprises a communication interface, a storage unit, a control unit, a system clock, a reset port and a driving circuit; the communication interface, the storage unit, the control unit and the driving circuit are sequentially connected; the system clock is connected with the storage unit, the control unit and the reset port respectively; the system clock accumulates the system time and judges whether an adjusting section at which the system time is arranged is changed or not; when the adjusting section is changed, the control unit looks up a table in the storage unit to find out a corresponding current compensation rate and finds out a corresponding output current parameter from a preset current compensation rate and output current relational table and finally the driving circuit adjusts output currents to stabilize the LED luminance. Compared with the prior art, the LED driving power source has the advantages of being integrated, stable, high in efficiency, transplantable and the like.
Description
Technical field
The present invention relates to a kind of LED driving power, especially relate to a kind of selecting type zero attenuation compensation integrated LED driving power of tabling look-up based on menu.
Background technology
LED is as light source of new generation, there are many premium properties, because of the energy of the electron transition that is PN junction of its principle and hole-recombination luminous, therefore be solid state light emitter, add the fluorescent material technology of efficient stable, LED light source has that luminous efficiency is high, power consumption is few, the life-span is long, photochromic pure, the incomparable superiority of many conventional light source such as stability is high, high safety, environmental protection, anti-vibration, it is a kind of lighting technology of environmental protection, under the background of China and global energy-saving and emission-reduction, the arriving of LED illumination is close at hand.
LED light decay refers to that LED is after lighting after a while, and its light intensity can be lower than original light intensity, and low part is exactly the light decay of LED.At present, LED function lighting all adopts powerful lamp pearl, although comparatively speaking, the LED life-span is very long, but due to the restriction of semiconductor light-emitting-diode wafer technologies at present, the photoelectric conversion efficiency of LED need to improve, especially great power LED, nearly more than 70% electric energy becomes heat energy and discharges, and the validity of heat dissipation technology and science neither be very desirable, add the harsh environments for use such as light fixture outward appearance, the situation that LED light declines is inevitable, therefore current LED lamp life level is lower, this makes LED promotion and application speed be subject to very big impact.
Summary of the invention
Object of the present invention is exactly that a kind of integrated, stable, high efficiency, the transplantable zero attenuation compensation integrated LED driving power of the selecting type of tabling look-up based on menu are provided in order to overcome the defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of selecting type zero attenuation compensation integrated LED driving power of tabling look-up based on menu, it is characterized in that, this LED driving power is connected with LED with computer respectively, described LED driving power comprises communication interface, memory cell, control unit, system clock, reseting port and drive circuit, described communication interface, memory cell, control unit are connected successively with drive circuit, and described system clock is connected with memory cell, control unit and reseting port respectively;
The described system clock accumulation system time, and whether the adjustment interval that judges system time place changes, when adjustment interval changes, control unit is tabled look-up and is found out corresponding current compensation rate from memory cell, then from preset current compensation rate with output current relation table, find corresponding output current parameter, finally by drive circuit, adjust output current, stablize LED brightness.
Described current compensation rate calculates according to user's input by computer.
Described computer generates current compensation rate and has two kinds of modes:
The first is User Defined mode, and the part relations point that computer is decayed in time according to the LED brightness of input simulates LED light decay curve, then by LED brightness and current relationship, calculates corresponding current cancellation ratio;
The second is to select existing curve mode, and computer is found out corresponding LED light decay curve according to the LED information of selecting from database, then by LED brightness and current relationship, calculates corresponding current cancellation ratio.
Described current compensation rate P is calculated as follows:
Wherein:
P is current compensation rate;
L is LED light decay percentage.
Described communication interface comprises ZigBee communication interface or RS485.
Described memory cell is deposited the current compensation rate of being obtained by communication interface and the running time being added up by system clock.
The current compensation rate that described control unit reading cells is stored, adjusts drive circuit, changes output current.
Described reseting port LED running time that is used for making zero.
Compared with prior art, the present invention has the following advantages:
1, LED driving power is integrated, and be connected with computer by communication interface, for user provides a convenience, operating platform intuitively, user can specifically need to customize attenuation compensation curve according to oneself, make the LED of any different light decay curves to realize attenuation compensation by same power supply, and, when needs are changed dissimilar LED or are changed environment for use temperature, do not need to replace driving power, as long as reset compensating parameter according to computer, and download to driving power, realized well the portability of product.
2, computer can read by communication interface running time and the current compensation information of LED, and presents intuitively.
3, reseting port, can be after LED accidental damage by this port LED timing time that makes zero.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is light modulation workflow diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1, a kind of selecting type zero attenuation compensation integrated LED driving power of tabling look-up based on menu, this LED driving power is connected with LED with computer respectively, described LED driving power comprises communication interface, memory cell, control unit, system clock, reseting port and drive circuit, described communication interface, memory cell, control unit are connected successively with drive circuit, and described system clock is connected with memory cell, control unit and reseting port respectively;
The described system clock accumulation system time, and whether the adjustment interval that judges system time place changes, when adjustment interval changes, control unit is tabled look-up and is found out corresponding current compensation rate from memory cell, then from preset current compensation rate with output current relation table, find corresponding output current parameter, finally by drive circuit, adjust output current, stablize LED brightness.
Described current compensation rate calculates according to user's input by computer.
Described computer generates current compensation rate and has two kinds of modes:
The first is User Defined mode, calculates the part relations point of decaying in time according to the LED brightness of input and simulates LED light decay curve, then by LED brightness and current relationship, calculates corresponding current cancellation ratio;
The second is to select existing curve mode, and computer is found out corresponding LED light decay curve according to the LED information of selecting from database, then by LED brightness and current relationship, calculates corresponding current cancellation ratio.
Described communication interface comprises ZigBee communication interface or RS485.
Described memory cell is deposited the current compensation rate of being obtained by communication interface and the running time being added up by system clock.The current compensation rate that described control unit reading cells is stored, adjusts drive circuit, changes output current.Described reseting port LED running time that is used for making zero.
As shown in Figure 2, LED driving power obtains after compensated information can independent operating, system clock accumulation system time during work, and the adjustment that judges system time place is interval, when adjustment interval changes, control unit is tabled look-up and is found out corresponding current compensation rate from memory cell, then from preset current compensation rate, finds corresponding current parameters with output current relation table, finally by drive circuit, adjust output current, stablize LED brightness.
Claims (8)
1. the selecting type zero attenuation compensation integrated LED driving power of tabling look-up based on menu, it is characterized in that, this LED driving power is connected with LED with computer respectively, described LED driving power comprises communication interface, memory cell, control unit, system clock, reseting port and drive circuit, described communication interface, memory cell, control unit are connected successively with drive circuit, and described system clock is connected with memory cell, control unit and reseting port respectively;
The described system clock accumulation system time, and whether the adjustment interval that judges system time place changes, when adjustment interval changes, control unit is tabled look-up and is found out corresponding current compensation rate from memory cell, then from preset current compensation rate with output current relation table, find corresponding output current parameter, finally by drive circuit, adjust output current, stablize LED brightness.
2. the selecting type zero attenuation compensation integrated LED driving power of tabling look-up based on menu according to claim 1, is characterized in that, described current compensation rate calculates according to user's input by computer.
3. the selecting type zero attenuation compensation integrated LED driving power of tabling look-up based on menu according to claim 1, is characterized in that, described computer generates current compensation rate and has two kinds of modes:
The first is User Defined mode, and the part relations point that computer is decayed in time according to the LED brightness of input simulates LED light decay curve, then by LED brightness and current relationship, calculates corresponding current cancellation ratio;
The second is to select existing curve mode, and computer is found out corresponding LED light decay curve according to the LED information of selecting from database, then by LED brightness and current relationship, calculates corresponding current cancellation ratio.
4. the selecting type zero attenuation compensation integrated LED driving power of tabling look-up based on menu according to claim 3, is characterized in that, described current compensation rate P is calculated as follows:
Wherein:
P is current compensation rate;
L is LED light decay percentage.
5. the selecting type zero attenuation compensation integrated LED driving power of tabling look-up based on menu according to claim 1, is characterized in that, described communication interface comprises ZigBee communication interface or RS485.
6. the selecting type zero attenuation compensation integrated LED driving power of tabling look-up based on menu according to claim 1, is characterized in that, described memory cell is deposited the current compensation rate of being obtained by communication interface and the running time being added up by system clock.
7. the selecting type zero attenuation compensation integrated LED driving power of tabling look-up based on menu according to claim 1, is characterized in that, the current compensation rate that described control unit reading cells is stored, adjusts drive circuit, changes output current.
8. the selecting type zero attenuation compensation integrated LED driving power of tabling look-up based on menu according to claim 1, is characterized in that, described reseting port LED running time that is used for making zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310157503.5A CN104125679B (en) | 2013-04-28 | 2013-04-28 | Menu based table look-up selection type zero attenuation compensation integrated LED (Light Emitting Diode) driving power source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310157503.5A CN104125679B (en) | 2013-04-28 | 2013-04-28 | Menu based table look-up selection type zero attenuation compensation integrated LED (Light Emitting Diode) driving power source |
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| CN104125679A true CN104125679A (en) | 2014-10-29 |
| CN104125679B CN104125679B (en) | 2017-02-22 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101414435A (en) * | 2007-10-18 | 2009-04-22 | 奇景光电股份有限公司 | Apparatus and method to compensate a driving current of a light emitting diode |
| CN101765272A (en) * | 2010-01-13 | 2010-06-30 | 惠州雷士光电科技有限公司 | LED (light emitting diode) optical attenuation compensating method and realizing circuit thereof |
| CN101770752A (en) * | 2008-12-30 | 2010-07-07 | 鸿富锦精密工业（深圳）有限公司 | Display and display control method |
| US20100176740A1 (en) * | 2007-06-22 | 2010-07-15 | Osram Gesellschaft Mit Beschraenkter Haftung | Feedforward control of semiconductor light sources |
| CN202261968U (en) * | 2011-09-23 | 2012-05-30 | 武汉大学 | Energy-saving intelligent light-emitting diode (LED) road lamp system based on grading communication mechanism |
-
2013
- 2013-04-28 CN CN201310157503.5A patent/CN104125679B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100176740A1 (en) * | 2007-06-22 | 2010-07-15 | Osram Gesellschaft Mit Beschraenkter Haftung | Feedforward control of semiconductor light sources |
| CN101414435A (en) * | 2007-10-18 | 2009-04-22 | 奇景光电股份有限公司 | Apparatus and method to compensate a driving current of a light emitting diode |
| CN101770752A (en) * | 2008-12-30 | 2010-07-07 | 鸿富锦精密工业（深圳）有限公司 | Display and display control method |
| CN101765272A (en) * | 2010-01-13 | 2010-06-30 | 惠州雷士光电科技有限公司 | LED (light emitting diode) optical attenuation compensating method and realizing circuit thereof |
| CN202261968U (en) * | 2011-09-23 | 2012-05-30 | 武汉大学 | Energy-saving intelligent light-emitting diode (LED) road lamp system based on grading communication mechanism |
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| CN104125679B (en) | 2017-02-22 |
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