CN109488916A - A kind of LED of anti-flashing - Google Patents
A kind of LED of anti-flashing Download PDFInfo
- Publication number
- CN109488916A CN109488916A CN201811377091.5A CN201811377091A CN109488916A CN 109488916 A CN109488916 A CN 109488916A CN 201811377091 A CN201811377091 A CN 201811377091A CN 109488916 A CN109488916 A CN 109488916A
- Authority
- CN
- China
- Prior art keywords
- duty ratio
- led
- module
- amplifier
- comparison circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Abstract
The invention belongs to field of LED illumination, and in particular to a kind of LED of anti-flashing, with driver, the driver includes drive module, computing module, judgment module, amplifier, attenuator, extraneous control signal is converted into pulsewidth signal and time pulse signal by light-adjusting module, drive module, and computing module calculates the first duty ratio according to pulsewidth signal and time pulse signal, it is handled through judgment module input amplifier or attenuator, by treated, duty ratio inputs light-adjusting module；Duty ratio is input in different processing units and handles, light-adjusting module is made smoothly to change the brightness of LED, LED is avoided to generate scintillation according to the change of extraneous control signal by device.
Description
Technical field
The invention belongs to field of LED illumination, in particular to a kind of LED of anti-flashing.
Background technique
The flicker problem that LED light source occurs during switching comes from phenomenon although the duration is very short
See, be can flash during switching or it is several under, give a kind of very uncomfortable feeling of people.
Summary of the invention
A kind of LED of anti-flashing is provided, the control signal that the external world is transmitted can be converted into reasonably to dim signal to adjust
The brightness of whole LED will not make LED generate scintillation.
A kind of LED of anti-flashing, with driver, the driver includes drive module, control unit, adjustment portion, control
Portion processed is according to the output of drive module, the dynamically operation in control and regulation portion；
The drive module is used to for the control signal of the raising LED luminance of external world's input or reduction LED luminance being converted into
Pulsewidth signal and time pulse signal, and export to the control unit；
The control unit is made of computing module and judgment module, in which:
The computing module is used to calculate the first duty ratio according to pulsewidth signal and time pulse signal；
The judgment module includes storage chip, difference circuit and comparison circuit, in which:
Storage chip stores the second currently used duty ratio of LED；
Difference circuit is used to calculate the absolute value of the difference of first duty ratio and second duty ratio；
Comparison circuit, according to the size relation between the absolute value and the limit value of setting, to adjustment portion output first
Duty ratio or the second duty ratio；
The adjustment portion is made of amplifier, the second comparison circuit, the second storage chip and light-adjusting module, wherein
The duty ratio that amplifier is used to export judgment module is amplified；
The size relation between duty ratio and the first duty ratio that second comparison circuit is exported for comparison amplifier,
Second storage chip stores the processed duty ratio of amplifier；
The brightness for the duty ratio adjustment LED that light-adjusting module is exported according to the second storage chip；
The control unit is configured as:
Difference circuit will be in the absolute value of difference and the limit value of setting input comparison circuit:
When the absolute value of difference is less than the limit value of setting, show computing module calculated first duty ratio input light modulation
LED will not be made to generate scintillation in module, then first duty ratio is input in light-adjusting module by comparison circuit；
When the absolute value of difference is greater than the limit value of setting, show computing module calculated first duty ratio input light modulation
It will cause LED flashing in module, then by the second duty ratio input amplifier in the first storage chip, second accounts for comparison circuit
Empty ratio is inputted after amplifier amplifies in the second comparison circuit, and the second comparison circuit stores the duty ratio less than the first duty ratio
It after the second storage chip, is re-fed into amplifier and amplifies, accounted for until the duty ratio exported in amplifier is greater than first
The duty ratio of storage is sequentially input light-adjusting module by storage order by empty ratio, the second storage chip, and light-adjusting module is made smoothly will
The brightness of LED is increased to brightness required for extraneous control signal, and LED will not be made to generate flashing.
The beneficial effects of the present invention are: duty ratio is input to different by the present invention according to the change of extraneous control signal
It is handled in processing unit, light-adjusting module is made smoothly to change the brightness of LED, LED is avoided to generate scintillation.
Detailed description of the invention
Fig. 1 shows the schematic diagram of driver；
Fig. 2 shows the schematic diagrames of judgment module；
Fig. 3 shows the schematic diagram of difference circuit；
Fig. 4 shows the schematic diagram of the first comparison circuit；
Fig. 5 shows the schematic diagram of the second comparison circuit；
Fig. 6 shows the control flow chart of driver；
Fig. 7 shows the theory of constitution block diagram of driver.
Specific embodiment
With reference to the accompanying drawings, the function that the structure of this system is described in detail and is realized.
A kind of LED of anti-flashing, with driver, the driver includes drive module 1, control unit 2, adjustment portion 3,
Control unit 2 is according to the operation in the testing result of drive module 1 dynamically control and regulation portion 3；
The raising LED luminance control signal of external world's input is converted into pulsewidth signal and time pulse signal simultaneously by drive module 1
It is input in control unit 2；
Control unit 2 is made of computing module 21, judgment module 22, in which:
Computing module 21 calculates the first duty ratio according to pulsewidth signal and time pulse signal；
Judgment module 22 comprising the first storage chip 221, difference circuit 222, the first comparison circuit 223, in which:
First storage chip 221 stores the second currently used duty ratio of device
Difference circuit 222, the device that the first duty ratio and storage chip 221 for being used to input in computing module 21 store
The absolute value of the difference of the second currently used duty ratio；
First comparison circuit 223, according to the size relation between the absolute value of difference and the limit value of system, to adjusting
The first duty ratio or the second duty ratio are inputted in portion 3；
Adjustment portion 3, by amplifier 31, the second comparison circuit 32, the second storage chip 33, light-adjusting module 34 formed,
In:
Amplifier 31, the duty ratio that judgment module 22 is exported are amplified；
Second comparison circuit 32, the size being used between the duty ratio and the first duty ratio of the output of comparison amplifier 31 are closed
System,
Second storage chip 33 stores the processed duty ratio of amplifier 31；
The brightness for the duty ratio adjustment LED that light-adjusting module 34 is exported according to the second storage chip 33；
Control unit 2 and drive module 11, amplifier 31, the connection of 33 signal of light-adjusting module, and be configured that
Difference circuit 222 will be in the absolute value of difference and system limit value input comparison circuit 223:
When difference absolute value be less than system limit value, show by calculated first duty ratio of computing module 21 input
LED will not be made to generate scintillation in adjustment module 33, comparison circuit 223 is defeated by calculated first duty ratio of computing module 21
Enter into light-adjusting module 33；
When difference absolute value be greater than system limit value, show by calculated first duty ratio of computing module 21 input
It will cause LED light group flashing in adjustment module 33, comparison circuit 223 second is accounted for device in the first storage chip 221 is current
Sky is than in input amplifier 31, the second duty ratio inputs in the second comparison circuit 32 after the amplification of amplifier 31, and the second comparison is electric
After duty ratio less than the first duty ratio is stored in the second storage chip 33 by road 32, it is re-fed into amplifier 31 and is put
Greatly, until the duty ratio that exports in amplifier 31 is greater than the first duty ratio, the second storage chip 33 is by the duty ratio of storage by depositing
Storage sequence is sequentially input in light-adjusting module 34, so that the brightness of LED smoothly can be increased to extraneous control letter by light-adjusting module 34
Brightness required for number, and LED will not be made to generate scintillation.
One skilled in the art would recognize that without departing substantially from the spirit and scope of the invention as generally describing,
Various variations and/or modification can be carried out to invention shown in each specific embodiment.Therefore, in terms of all
For, embodiment here is considered as illustrative and and non-limiting.Equally, the present invention includes any feature
Combination, the combination of any feature especially in Patent right requirement, even if the combination of this feature or feature is not in patent
It is explicitely stated in claim or each embodiment here.
Claims (2)
1. a kind of LED of anti-flashing, with driver, which is characterized in that external control signal is converted by the driver
It is reasonable to dim signal to adjust the brightness of LED, to avoid or mitigate the flashing of LED.
2. a kind of LED of anti-flashing, with driver, the driver includes drive module, control unit, adjustment portion, control
Portion is according to the output of drive module, the dynamically operation in control and regulation portion；It is characterized in that,
The drive module is used to the control signal of the raising LED luminance of external world's input or reduction LED luminance being converted into pulsewidth
Signal and time pulse signal, and export to the control unit；
The control unit is made of computing module and judgment module, in which:
The computing module is used to calculate the first duty ratio according to pulsewidth signal and time pulse signal；
The judgment module includes storage chip, difference circuit and comparison circuit, in which:
Storage chip stores the second currently used duty ratio of LED；
Difference circuit is used to calculate the absolute value of the difference of first duty ratio and second duty ratio；
Comparison circuit exports the first duty to adjustment portion according to the size relation between the absolute value and the limit value of setting
Than or the second duty ratio；
The adjustment portion is made of amplifier, the second comparison circuit, the second storage chip and light-adjusting module, wherein
The duty ratio that amplifier is used to export judgment module is amplified；
The size relation between duty ratio and the first duty ratio that second comparison circuit is exported for comparison amplifier,
Second storage chip stores the processed duty ratio of amplifier；
The brightness for the duty ratio adjustment LED that light-adjusting module is exported according to the second storage chip；
The control unit is configured as:
Difference circuit will be in the absolute value of difference and the limit value of setting input comparison circuit:
When the absolute value of difference is less than the limit value of setting, show computing module calculated first duty ratio input light-adjusting module
In will not make LED generate scintillation, then first duty ratio is input in light-adjusting module by comparison circuit；
When the absolute value of difference is greater than the limit value of setting, show computing module calculated first duty ratio input light-adjusting module
In will cause LED flashing, then comparison circuit is by the second duty ratio input amplifier in the first storage chip, the second duty ratio
It is inputted after amplifier amplifies in the second comparison circuit, the duty ratio less than the first duty ratio is stored in by the second comparison circuit
After two storage chips, it is re-fed into amplifier and amplifies, until the duty ratio that exports in amplifier is greater than the first duty ratio,
The duty ratio of storage is sequentially input light-adjusting module by storage order by the second storage chip, makes light-adjusting module smoothly by LED's
Brightness is increased to brightness required for extraneous control signal, and LED will not be made to generate flashing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811377091.5A CN109488916A (en) | 2018-11-19 | 2018-11-19 | A kind of LED of anti-flashing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811377091.5A CN109488916A (en) | 2018-11-19 | 2018-11-19 | A kind of LED of anti-flashing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109488916A true CN109488916A (en) | 2019-03-19 |
Family
ID=65696888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811377091.5A Pending CN109488916A (en) | 2018-11-19 | 2018-11-19 | A kind of LED of anti-flashing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109488916A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340907A (en) * | 2010-07-21 | 2012-02-01 | 立锜科技股份有限公司 | Light emitting diode (LED) controller having function of flicker removal, LED flicker removal circuit and related method |
| CN102487568A (en) * | 2010-12-01 | 2012-06-06 | 海洋王照明科技股份有限公司 | De-jittering control method for LED light source and circuit thereof |
| CN103456275A (en) * | 2012-05-29 | 2013-12-18 | 乐金显示有限公司 | Backlight driver of liquid crystal display device and method for driving the same |
| CN103684357A (en) * | 2012-09-03 | 2014-03-26 | 欧司朗股份有限公司 | Duty ratio-adjustable pulse generator and pulse width modulation dimming circuit |
| CN205179441U (en) * | 2015-09-10 | 2016-04-20 | 天津工业大学 | Indoor LED lighting system of intelligence bluetooth of mobile phone control |
| CN106714391A (en) * | 2017-03-07 | 2017-05-24 | 苏州佳世达电通有限公司 | Dimming device and dimming method thereof |
| JP2018177203A (en) * | 2017-04-14 | 2018-11-15 | 株式会社シマノ | Notification device for vehicle |
-
2018
- 2018-11-19 CN CN201811377091.5A patent/CN109488916A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340907A (en) * | 2010-07-21 | 2012-02-01 | 立锜科技股份有限公司 | Light emitting diode (LED) controller having function of flicker removal, LED flicker removal circuit and related method |
| CN102487568A (en) * | 2010-12-01 | 2012-06-06 | 海洋王照明科技股份有限公司 | De-jittering control method for LED light source and circuit thereof |
| CN103456275A (en) * | 2012-05-29 | 2013-12-18 | 乐金显示有限公司 | Backlight driver of liquid crystal display device and method for driving the same |
| CN103684357A (en) * | 2012-09-03 | 2014-03-26 | 欧司朗股份有限公司 | Duty ratio-adjustable pulse generator and pulse width modulation dimming circuit |
| CN205179441U (en) * | 2015-09-10 | 2016-04-20 | 天津工业大学 | Indoor LED lighting system of intelligence bluetooth of mobile phone control |
| CN106714391A (en) * | 2017-03-07 | 2017-05-24 | 苏州佳世达电通有限公司 | Dimming device and dimming method thereof |
| JP2018177203A (en) * | 2017-04-14 | 2018-11-15 | 株式会社シマノ | Notification device for vehicle |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190319 |
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| WD01 | Invention patent application deemed withdrawn after publication |