CN104125678B - 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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- CN104125678B CN104125678B CN201310157474.2A CN201310157474A CN104125678B CN 104125678 B CN104125678 B CN 104125678B CN 201310157474 A CN201310157474 A CN 201310157474A CN 104125678 B CN104125678 B CN 104125678B
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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 compensation technique the present invention relates to a kind of LED light declines, more particularly, to a kind of selecting type LED light of tabling look-up based on menu
Decline compensation dimmer.
Background technology
Going from bad to worse for energy crisis, greenhouse effect and ecological environment forces people increasingly to pay attention to improving utilization of energy
Efficiency and the technology of environmental conservation.LED (Light Emitting Diode, semiconductor light-emitting-diode) light sources are with without poisonous
The advantages such as material, environmental protection, life-span length, photoelectric efficiency height, have obtained increasingly being widely applied in lighting field.LED light source by
One constant-current source provides unidirectional current as driver.Although LED light source is driven by constant-current source, due to chip and fluorescent material
Aging action, the luminous flux of LED light source output can decline over time, i.e., the luminous flux of LED light source gradually can be decayed.At present
Conventional LED light declines, and compensation scheme one side versatility is poor, and LED driver can only provide a kind of or a limited number of kind of light decay and mend
Repay, if using LED light decline characteristic not in the range of attenuation compensation, or need just can not when changing different applied environment temperature
Produce a desired effect；On the other hand, as neither one is intuitively available for the platform of user operation, user select LED or
Observation decline compensation effect and run time etc. of LED light is very inconvenient.
The content of the invention
The purpose of the present invention is exactly to provide a kind of portable, considerable to overcome the defect of above-mentioned prior art presence
The property surveyed, reducibility and high flexibility are declined compensation dimmer based on the selecting type LED light of tabling look-up of menu.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of selecting type LED light of tabling look-up based on menu declines compensation dimmer, and the attenuation compensation dimmer is connected on computer
And LED drive power between, it is characterised in that described attenuation compensation dimmer includes that communication interface, memory element, control are single
Unit, system clock, reseting port and light modulation output interface, described reseting port, system clock, control unit, dim it is defeated
Outgoing interface is sequentially connected, and described memory element is connected with communication interface, control unit, system clock respectively；
Described computer calculates current compensation rate data according to the input of user, and current compensation rate data are downloaded
To in the memory element of attenuation compensation dimmer, system clock accumulation system time when LED drive power works, and judge be
Whether the adjustment interval that the system time is located changes, and when adjustment interval changes, control unit is found out from memory element
Corresponding current compensation rate, then finds corresponding current parameters with output current relation table from preset current compensation rate,
Adjustment light modulation output, by the stable LED luminance of LED drive power.
Described attenuation compensation dimmer is connected with computer by communication modes change-over circuit, and described communication modes turn
Change the communication modes that the common interfaces of computer are converted to circuit the matching of attenuation compensation dimmer communication interface.
The common interfaces of described computer include Ethernet, serial ports or parallel port.
The matching communication modes of the communication interface of described attenuation compensation dimmer include ZigBee or RS485.
Described computer generates the total two ways of current compensation rate：
The first is User Defined mode, the part relations point that computer is decayed with the time according to the LED luminance of input
Fit LED light to decline curve, corresponding current cancellation ratio is calculated by LED luminance and current relationship then；
Second is to select existing curve mode, and computer is found out corresponding from data base according to the LED information for selecting
LED light declines curve, then calculates corresponding current cancellation ratio by LED luminance and current relationship.
Described current compensation rate P is calculated as follows：
Wherein：
P is current compensation rate；
L declines percentage ratio for LED light.
After LED accidental damages, by computer or reseting port zero timing time.
Compared with prior art, the present invention has advantages below：
This programme utilizes menu option, has provided the user convenient, an intuitively operating platform, and user can basis
Oneself real needs customizes attenuation compensation curve, by external attenuation compensation dimmer, in that context it may be convenient to change attenuation compensation tune
All LED drive powers with 0-10V light modulations or PWM light modulations are realized the LED of different light decay curves by the configuration file of light device
Attenuation compensation function, realizes the portability of product well.Computer can read the fortune of LED by communication interface in addition
Row time and current compensation information, allow which intuitively to present, it is also possible to after LED accidental damages by software (or reset
Port) zero timing time etc., need to change different types of LED or change use environment temperature, need to only update light decay benefit
Dimmer compensating parameter is repaid, or directly changes attenuation compensation dimmer.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the LED drive module workflow diagram of the present invention；
Fig. 3 is the flow chart that the computer of the present invention generates current compensation rate.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
As shown in Figure 1-2, a kind of selecting type LED light of tabling look-up based on menu declines compensation dimmer, and the attenuation compensation is dimmed
Device is connected between computer and LED drive power, and described attenuation compensation dimmer includes communication interface, memory element, control
Unit, system clock, reseting port and light modulation output interface, described reseting port, system clock, control unit, light modulation
Output interface is sequentially connected, and described memory element is connected with communication interface, control unit, system clock respectively；
Described computer calculates current compensation rate data according to the input of user, and current compensation rate data are downloaded
To in the memory element of attenuation compensation dimmer, system clock accumulation system time when LED drive power works, and judge be
Whether the adjustment interval that the system time is located changes, and when adjustment interval changes, control unit is found out from memory element
Corresponding current compensation rate, then finds corresponding current parameters with output current relation table from preset current compensation rate,
Adjustment light modulation output, by the stable LED luminance of LED drive power.
Described communication interface is used for data transfer, compensated information that memory element storage is obtained by communication interface and by being
The accumulative run time of system clock, compensated information and system clock collective effect are in control unit, control light modulation output, reset terminal
Mouth opening, for the LED run times that are zeroed.Described attenuation compensation dimmer is by communication modes change-over circuit and calculating
Machine connects, and the common interfaces of computer are converted to attenuation compensation dimmer communication interface by described communication modes change-over circuit
The communication modes matched somebody with somebody.The common interfaces of described computer include Ethernet, serial ports or parallel port.Described attenuation compensation dimmer
The matching communication modes of communication interface include ZigBee or RS485.
As shown in figure 3, described computer generates the total two ways of current compensation rate：The first is User Defined side
Formula, software fit LED light with the part relations point that the time decays according to the LED luminance of input and decline curve, then bright by LED
Degree calculates corresponding current cancellation ratio with current relationship；Second is to select existing curve mode, and computer is according to the LED for selecting
The information such as manufacturer, model, junction temperature are found out corresponding LED light from data base and are declined curve, then by LED luminance and current relationship
Calculate corresponding current cancellation ratio.Described current compensation rate P is calculated as follows：
Wherein：
P is current compensation rate；
L declines percentage ratio for LED light.
The specific work process of the present invention is as follows：
LED drive power to dimming with 0-10V or PWM is dimmed realizes attenuation compensation function, first computer software
The light decay curve of LED is fitted according to user input information, then the corresponding relation according to LED luminance with electric current calculates electric current
Current compensation rate, by the communication modes for selecting to be adapted to, is downloaded to attenuation compensation dimmer and is protected by cancellation ratio in dots
There is memory element, dimming interface of the attenuation compensation dimmer for light control output with LED drive power is attached.
Attenuation compensation dimmer accumulation system time when LED drive power works, and judge the tune that system time is located
Between main plot, when adjustment interval changes, control unit is tabled look-up from memory element and finds out corresponding current compensation rate, Ran Houcong
Preset current compensation rate is driven by LED with corresponding current parameters, adjustment light modulation output are found in output current relation table
Power good LED luminance.
Claims (6)
1. a kind of selecting type LED light of tabling look-up based on menu declines compensation dimmer, the attenuation compensation dimmer be connected on computer and
Between LED drive power, it is characterised in that described attenuation compensation dimmer includes that communication interface, memory element, control are single
Unit, system clock, reseting port and light modulation output interface, described reseting port, system clock, control unit, dim it is defeated
Outgoing interface is sequentially connected, and described memory element is connected with communication interface, control unit, system clock respectively；
Described computer calculates current compensation rate data according to the input of user, and current compensation rate data are downloaded to light
Decline in the memory element of compensation dimmer, system clock accumulation system time when LED drive power works, and when judging system
Between be located adjustment interval whether change, when adjust interval change when, control unit from memory element find out correspondence
Current compensation rate, then from preset current compensation rate with corresponding current parameters are found in output current relation table, adjust
Light modulation output, by the stable LED luminance of LED drive power；
Described computer generates the total two ways of current compensation rate：
The first is User Defined mode, the part relations point fitting that computer decay with the time according to the LED luminance of input
Go out LED light to decline curve, corresponding current cancellation ratio is calculated by LED luminance and current relationship then；Second is to select existing
Curve mode, computer are found out corresponding LED light from data base according to the LED information for selecting and are declined curve, then bright by LED
Degree calculates corresponding current cancellation ratio with current relationship；
Using menu option, convenient, an intuitively operating platform is provided the user, user can be according to oneself concrete need
Customization attenuation compensation curve is sought, by external attenuation compensation dimmer, the configuration file of attenuation compensation dimmer is changed, to all
Dim with 0-10V or the LED drive power of PWM light modulations realizes that the LED light of different light decay curves declines compensation function.
2. a kind of selecting type LED light of tabling look-up based on menu according to claim 1 declines compensation dimmer, and its feature exists
In described attenuation compensation dimmer is connected with computer by communication modes change-over circuit, described communication modes conversion electricity
The common interfaces of computer are converted to the communication modes of attenuation compensation dimmer communication interface matching on road.
3. a kind of selecting type LED light of tabling look-up based on menu according to claim 2 declines compensation dimmer, and its feature exists
In the common interfaces of described computer include Ethernet, serial ports or parallel port.
4. a kind of selecting type LED light of tabling look-up based on menu according to claim 2 declines compensation dimmer, and its feature exists
In the matching communication modes of the communication interface of described attenuation compensation dimmer include ZigBee or RS485.
5. a kind of selecting type LED light of tabling look-up based on menu according to claim 1 declines compensation dimmer, and its feature exists
In described current compensation rate P is calculated as follows：
Wherein：P is current compensation rate；L declines percentage ratio for LED light.
6. a kind of selecting type LED light of tabling look-up based on menu according to claim 1 declines compensation dimmer, and its feature exists
In after LED accidental damages, by computer or reseting port zero timing time.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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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| CN104125678A CN104125678A (en) | 2014-10-29 |
| CN104125678B true CN104125678B (en) | 2017-04-12 |
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| CN201310157474.2A Active 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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| 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 |
Citations (4)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2160926B1 (en) * | 2007-06-22 | 2018-09-12 | OSRAM GmbH | Feedforward control of semiconductor light sources |
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Patent Citations (4)
| 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 |
| 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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