CN104125678A - Menu based table look-up selection type LED (Light Emitting Diode) attenuation compensation dimmer - Google Patents
Menu based table look-up selection type LED (Light Emitting Diode) attenuation compensation dimmer Download PDFInfo
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- CN104125678A CN104125678A CN201310157474.2A CN201310157474A CN104125678A CN 104125678 A CN104125678 A CN 104125678A CN 201310157474 A CN201310157474 A CN 201310157474A CN 104125678 A CN104125678 A CN 104125678A
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Abstract
The invention relates to a menu based table look-up selection type LED (Light Emitting Diode) attenuation compensation dimmer. The attenuation compensation dimmer which is connected between a computer and an LED driving power source comprises a communication interface, a storage unit, a control unit, a system clock, a reset port and a dimming output interface; the reset port, the system clock, the control unit and the dimming output interface are sequentially connected; the storage unit is connected with the communication interface, the control unit and the system clock. Compared with the prior art, the attenuation compensation dimmer has the advantages of having the portability, the observability and the reducibility, being high in flexibility and the like.
Description
Technical field
The present invention relates to a kind of LED attenuation compensation technology, especially relate to a kind of selecting type LED attenuation compensation dimmer of tabling look-up based on menu.
Background technology
Going from bad to worse of energy crisis, greenhouse effect and biological environment forces people more and more to pay attention to improving the technology of efficiency of energy utilization and environmental protection.LED (Light Emitting Diode, semiconductor light-emitting-diode) light source, not contain the advantages such as noxious substance, environmental protection, the life-span is long, photoelectric efficiency is high, has obtained application more and more widely at lighting field.LED light source provides direct current by a constant-current source as driver.Although LED light source is driven by constant-current source, due to the aging action of chip and fluorescent material, the luminous flux of LED light source output can decline along with the time, and the luminous flux of LED light source can be decayed gradually.Versatility is poor on the one hand at present conventional LED attenuation compensation scheme, LED driver can only provide a kind of or limited several attenuation compensations, if the LED light decay characteristic of using is not within the scope of attenuation compensation, just can not produce a desired effect while maybe needing to change different applied environment temperature; On the other hand, because neither one intuitively can be for the platform of user's operation, user is selecting LED or observation LED attenuation compensation effect and running time etc. very inconvenient.
Summary of the invention
Object of the present invention is exactly that the selecting type LED attenuation compensation dimmer of tabling look-up based on menu of a kind of portability, observability, reducibility and high flexibility is provided in order to overcome the defect of above-mentioned prior art existence.
Object of the present invention can be achieved through the following technical solutions:
A kind of selecting type LED attenuation compensation dimmer of tabling look-up based on menu, this attenuation compensation dimmer is connected between computer and LED driving power, it is characterized in that, described attenuation compensation dimmer comprises communication interface, memory cell, control unit, system clock, reseting port and light modulation output interface, described reseting port, system clock, control unit, light modulation output interface connect successively, and described memory cell is connected with communication interface, control unit, system clock respectively;
Described computer calculates current compensation rate data according to user's input, and current compensation rate data are downloaded in the memory cell of attenuation compensation dimmer, accumulation system time when system clock is worked at LED driving power, and whether the adjustment interval that judges system time place changes, when adjustment interval changes, control unit is found out corresponding current compensation rate from memory cell, then from preset current compensation rate, find corresponding current parameters with output current relation table, adjustment light modulation output, stablizes LED brightness by LED driving power.
Described attenuation compensation dimmer is connected with computer by communication modes change-over circuit, and described communication modes change-over circuit is converted to the common interfaces of computer the communication modes of attenuation compensation dimmer communication interface coupling.
The common interfaces of described computer comprises Ethernet, serial ports or parallel port.
The coupling communication modes of the communication interface of described attenuation compensation dimmer comprises ZigBee or RS485.
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.
After LED accidental damage, by computer or the reseting port timing time that makes zero.
Compared with prior art, the present invention has the following advantages:
This programme utilizes menu option, for user provides a convenience, operating platform intuitively, user can be according to own real needs customization attenuation compensation curve, by external attenuation compensation dimmer, can change easily the configuration file of attenuation compensation dimmer, the LED driving power of all 0-10V of having light modulations or PWM light modulation be realized to the LED attenuation compensation function of different light decay curves, well realize the portability of product.Computer can read by communication interface running time and the current compensation information of LED in addition, allow it present intuitively, also can be after LED accidental damage by software (or reseting port) timing time etc. that makes zero, need to change dissimilar LED or change environment for use temperature, only need to upgrade attenuation compensation dimmer compensating parameter, or directly change attenuation compensation dimmer.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is LED driver module workflow diagram of the present invention;
Fig. 3 is the flow chart that computer of the present invention generates current compensation rate.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1-2, a kind of selecting type LED attenuation compensation dimmer of tabling look-up based on menu, this attenuation compensation dimmer is connected between computer and LED driving power, described attenuation compensation dimmer comprises communication interface, memory cell, control unit, system clock, reseting port and light modulation output interface, described reseting port, system clock, control unit, light modulation output interface connect successively, and described memory cell is connected with communication interface, control unit, system clock respectively;
Described computer calculates current compensation rate data according to user's input, and current compensation rate data are downloaded in the memory cell of attenuation compensation dimmer, accumulation system time when system clock is worked at LED driving power, and whether the adjustment interval that judges system time place changes, when adjustment interval changes, control unit is found out corresponding current compensation rate from memory cell, then from preset current compensation rate, find corresponding current parameters with output current relation table, adjustment light modulation output, stablizes LED brightness by LED driving power.
Described communication interface is for transfer of data, memory cell is deposited the compensated information being obtained by communication interface and the running time being added up by system clock, and compensated information and system clock acting in conjunction, in control unit, are controlled light modulation output, reseting port opening, for making zero LED running time.Described attenuation compensation dimmer is connected with computer by communication modes change-over circuit, and described communication modes change-over circuit is converted to the common interfaces of computer the communication modes of attenuation compensation dimmer communication interface coupling.The common interfaces of described computer comprises Ethernet, serial ports or parallel port.The coupling communication modes of the communication interface of described attenuation compensation dimmer comprises ZigBee or RS485.
As shown in Figure 3, described computer generates current compensation rate and has two kinds of modes: the first is User Defined mode, the part relations point that software 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 according to the LED manufacturer of selecting, model, and the information such as junction temperature are found out corresponding LED light decay curve from database, then by LED brightness and current relationship, calculate 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.
Specific works process of the present invention is as follows:
To thering is the LED driving power of 0-10V light modulation or PWM light modulation, realize attenuation compensation function, first computer software simulates the light decay curve of LED according to user's input information, then according to the corresponding relation of LED brightness and electric current, calculate current compensation rate, by selecting applicable communication modes, form by current compensation rate with point downloads to attenuation compensation dimmer and is kept at memory cell, and the output of attenuation compensation dimmer for light control is connected with the dimming interface of LED driving power.
Accumulation system time when attenuation compensation dimmer is worked at LED driving power, 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, find corresponding current parameters with output current relation table, adjustment light modulation output, stablizes LED brightness by LED driving power.
Claims (7)
1. the selecting type LED attenuation compensation dimmer of tabling look-up based on menu, this attenuation compensation dimmer is connected between computer and LED driving power, it is characterized in that, described attenuation compensation dimmer comprises communication interface, memory cell, control unit, system clock, reseting port and light modulation output interface, described reseting port, system clock, control unit, light modulation output interface connect successively, and described memory cell is connected with communication interface, control unit, system clock respectively;
Described computer calculates current compensation rate data according to user's input, and current compensation rate data are downloaded in the memory cell of attenuation compensation dimmer, accumulation system time when system clock is worked at LED driving power, and whether the adjustment interval that judges system time place changes, when adjustment interval changes, control unit is found out corresponding current compensation rate from memory cell, then from preset current compensation rate, find corresponding current parameters with output current relation table, adjustment light modulation output, stablizes LED brightness by LED driving power.
2. a kind of selecting type LED attenuation compensation dimmer of tabling look-up based on menu according to claim 1, it is characterized in that, described attenuation compensation dimmer is connected with computer by communication modes change-over circuit, and described communication modes change-over circuit is converted to the common interfaces of computer the communication modes of attenuation compensation dimmer communication interface coupling.
3. a kind of selecting type LED attenuation compensation dimmer of tabling look-up based on menu according to claim 2, is characterized in that, the common interfaces of described computer comprises Ethernet, serial ports or parallel port.
4. a kind of selecting type LED attenuation compensation dimmer of tabling look-up based on menu according to claim 2, is characterized in that, the coupling communication modes of the communication interface of described attenuation compensation dimmer comprises ZigBee or RS485.
5. a kind of selecting type LED attenuation compensation dimmer 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.
6. a kind of selecting type LED attenuation compensation dimmer of tabling look-up based on menu according to claim 5, 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.
7. a kind of selecting type LED attenuation compensation dimmer of tabling look-up based on menu according to claim 1, is characterized in that, after LED accidental damage, by computer or the reseting port timing time that makes zero.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310157474.2A CN104125678B (en) | 2013-04-28 | 2013-04-28 | Menu based table look-up selection type LED (Light Emitting Diode) attenuation compensation dimmer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310157474.2A CN104125678B (en) | 2013-04-28 | 2013-04-28 | Menu based table look-up selection type LED (Light Emitting Diode) attenuation compensation dimmer |
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| CN104125678A true CN104125678A (en) | 2014-10-29 |
| CN104125678B CN104125678B (en) | 2017-04-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108633125A (en) * | 2017-03-21 | 2018-10-09 | 上海鸣志自动控制设备有限公司 | A kind of PWM copped wave light adjusting systems modulated using arithmetic progression |
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| 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 |
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2013
- 2013-04-28 CN CN201310157474.2A patent/CN104125678B/en active Active
Patent Citations (5)
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| 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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| CN108633125A (en) * | 2017-03-21 | 2018-10-09 | 上海鸣志自动控制设备有限公司 | A kind of PWM copped wave light adjusting systems modulated using arithmetic progression |
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