CN112333881A - Multi-LED luminous source control system - Google Patents
Multi-LED luminous source control system Download PDFInfo
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- CN112333881A CN112333881A CN202011103579.6A CN202011103579A CN112333881A CN 112333881 A CN112333881 A CN 112333881A CN 202011103579 A CN202011103579 A CN 202011103579A CN 112333881 A CN112333881 A CN 112333881A
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- led
- abnormal
- current value
- led luminous
- led light
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- 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
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
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- 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
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- 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
- H05B47/165—Controlling the light source following a pre-assigned programmed sequence; Logic control [LC]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a multi-LED luminous source control system, which comprises: the LED driving device comprises a plurality of LED luminous sources, a plurality of LED driving modules, a counting module and a control module, wherein the counting module is used for counting the number of abnormal LED luminous sources and non-abnormal LED luminous sources, the number of the abnormal LED luminous sources is marked as A, the number of the non-abnormal LED luminous sources is marked as B, the LED luminous sources are in one-to-one correspondence with the LED driving modules, and the control module calculates to obtain a first current value
When in use
If so, It takes It as the target current value, otherwise It takes
And as the target current value, the control module controls the LED driving module corresponding to the non-abnormal LED luminous source to output the target current value. The brightness loss caused by the abnormal LED luminous source is made up to the maximum extent by changing the driving current of the non-abnormal LED luminous source. The problem of the obvious decline of luminance because of the LED light emitting source is unusual is solved. The invention is mainly used in the technical field of illumination.
Description
Technical Field
The invention relates to the technical field of illumination, in particular to a multi-LED luminous source control system.
Background
The existing lamp has a lighting scheme formed by a plurality of light-emitting sources, and for the lighting scheme, when one or more light-emitting sources have problems, such as failure, the brightness of the whole lamp is obviously reduced. This significant brightness drop is undesirable to many lamp users. Therefore, how to avoid the situation is a problem which needs to be solved urgently in the industry.
Disclosure of Invention
The purpose of the invention is: the present invention provides a multi-LED illumination source control system, which solves one or more of the problems of the prior art, and provides at least one of the advantages of the present invention.
The solution of the invention for solving the technical problem is as follows: a multi-LED light emitting source control system comprising: the LED light source counting device comprises a plurality of LED light sources, a plurality of LED driving modules, a counting module and a control module, wherein the counting module is used for counting the number of abnormal LED light sources and non-abnormal LED light sources, the number of the abnormal LED light sources is marked as A, and the number of the non-abnormal LED light sources is marked as B; the LED luminous sources correspond to the LED driving modules one to one, and the control module calculates to obtain a first current value
When in use
If so, It takes It as the target current value, otherwise It takes
As the target current value, wherein I is the rated current value of the LED luminous source, and It is LEAnd D, controlling the LED driving module corresponding to the non-abnormal LED luminous source to output a target current value by the control module, wherein A + B is more than 3, and A and B are positive integers.
Further, the LED driving module outputs a target current value in a square wave form.
Further, the form of the square wave includes: the LED lighting device comprises a square wave width and a square wave duty ratio, wherein the square wave width is the minimum cooling time of an LED light source, and the square wave duty ratio is 0.5.
Further, the counting module is used for counting the number of the abnormal LED light sources, specifically: detecting the current passing through the LED luminous source when the current is less than or equal to
In this case, the abnormal LED light sources are defined, and the others are defined as the non-abnormal LED light sources.
Further, the control module is a single chip microcomputer.
The invention has the beneficial effects that: there is provided a multi LED light emitting source control system comprising: the LED light source counting device comprises a plurality of LED light sources, a plurality of LED driving modules, a counting module and a control module, wherein the counting module is used for counting the number of abnormal LED light sources and non-abnormal LED light sources, the number of the abnormal LED light sources is marked as A, and the number of the non-abnormal LED light sources is marked as B; the LED luminous sources correspond to the LED driving modules one to one, and the control module calculates to obtain a first current value
When in use
If so, It takes It as the target current value, otherwise It takes
As the target current value, wherein I is the rated current value of the LED luminous source, It is the maximum current value of the LED luminous source, A + B is more than 3, and the control module controls the output of the LED driving module corresponding to the non-abnormal LED luminous sourceThe target current value. The brightness loss caused by the abnormal LED luminous source is made up to the maximum extent by changing the driving current of the non-abnormal LED luminous source. The problem of the obvious decline of luminance because of the LED light emitting source is unusual is solved.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.
Fig. 1 is a system block diagram of a multi-LED light emitting source control system.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
Embodiment 1, referring to fig. 1, a multi-LED illumination source control system includes: the LED light source counting device comprises a plurality of LED light sources, a plurality of LED driving modules, a counting module and a control module, wherein the counting module is used for counting the number of abnormal LED light sources and non-abnormal LED light sources, the number of the abnormal LED light sources is marked as A, and the number of the non-abnormal LED light sources is marked as B; the LED luminous sources correspond to the LED driving modules one to one, and the control module calculates to obtain a first current value
When in use
If so, It takes It as the target current value, otherwise It takes
And controlling the output target current value of the LED driving module corresponding to the non-abnormal LED luminous source by the control module, wherein I is the rated current value of the LED luminous source, It is the maximum current value of the LED luminous source, and A and B are positive integers. Wherein, the control module is a singlechip. A + B > 3, and the sum of A and B is just the number of LED light sources. The one-to-one correspondence between the LED luminous sources and the LED driving modules means that one LED driving module corresponds to one LED luminous source, and the corresponding LED driving module provides driving current for the corresponding LED luminous source. The luminous source is a lamp string consisting of a single LED lamp bead or a plurality of LED lamp beads.
When the LED light source is abnormal, the brightness of the LED light source is generally affected. In order to compensate for the brightness loss caused by the influence, the brightness of the non-abnormal LED light-emitting source is improved. The light emitting brightness of the non-abnormal LED luminous sources is improved by improving the output current of the LED driving modules corresponding to the non-abnormal LED luminous sources. The specific lifting scheme is as follows: when in use
If so, It takes It as the target current value, otherwise It takes
The target current value is I, wherein I is a rated current value of the LED luminous source, and It is a maximum current value of the LED luminous source. Therefore, the brightness loss caused by the abnormal LED luminous source is compensated to the maximum extent.
After the passing current of the non-abnormal LED luminous source is increased, if the non-abnormal LED luminous source runs for a long time, the heat of the non-abnormal LED luminous source is increased, and the service life of the non-abnormal LED luminous source is influenced. For this reason, in some embodiments, the LED driving module corresponding to the non-abnormal LED light emitting source outputs the target current value in the form of a square wave. The square wave form refers to a form in which the non-abnormal LED light emission source is lighted by pulse lighting. Due to persistence of vision of human eyes, the human eyes do not find abnormality. By the pulse lighting mode, cooling time can be reserved for the non-abnormal LED luminous source, and overheating of the non-abnormal LED luminous source is avoided.
For the square wave version, i.e. the pulsed ignition version, in some preferred embodiments the square wave version comprises: the LED lighting device comprises a square wave width and a square wave duty ratio, wherein the square wave width is the minimum cooling time of an LED light source, and the square wave duty ratio is 0.5. Wherein, the minimum cooling time of the LED luminous source refers to: the LED luminous source changes the brightness due to heating and can recover the minimum time of the initial state through natural heat dissipation.
In some preferred embodiments, the statistical module is configured to count the number of abnormal LED light sources, specifically: detecting the current passing through the LED luminous source when the current is less than or equal to
In this case, the abnormal LED light sources are defined, and the others are defined as the non-abnormal LED light sources.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention and its scope is defined by the claims appended hereto.
Claims (5)
1. A multi-LED luminous source control system is characterized in that: the method comprises the following steps: the LED light source counting device comprises a plurality of LED light sources, a plurality of LED driving modules, a counting module and a control module, wherein the counting module is used for counting the number of abnormal LED light sources and non-abnormal LED light sources, the number of the abnormal LED light sources is marked as A, and the number of the non-abnormal LED light sources is marked as B; LED luminous source and LED driving moduleThe control module calculates to obtain a first current value in one-to-one correspondence, and the first current value is
When in use
If so, It takes It as the target current value, otherwise It takes
And the control module controls the LED driving module corresponding to the non-abnormal LED luminous source to output the target current value, wherein I is the rated current value of the LED luminous source, It is the maximum current value of the LED luminous source, A + B is more than 3, and A and B are positive integers.
2. The multi-LED illumination source control system of claim 1, wherein: the LED driving module outputs a target current value in a square wave form.
3. The multi-LED illumination source control system of claim 1, wherein: the form of the square wave includes: the LED lighting device comprises a square wave width and a square wave duty ratio, wherein the square wave width is the minimum cooling time of an LED light source, and the square wave duty ratio is 0.5.
4. The multi-LED illumination source control system of claim 1, wherein: the counting module is used for counting the number of the abnormal LED luminous sources and specifically comprises the following steps: detecting the current passing through the LED luminous source when the current is less than or equal to
In this case, the abnormal LED light sources are defined, and the others are defined as the non-abnormal LED light sources.
5. The multi-LED illumination source control system of claim 1, wherein: the control module is a single chip microcomputer.
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| CN202011103579.6A CN112333881B (en) | 2020-10-15 | 2020-10-15 | Multi-LED luminous source control system |
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| CN202011103579.6A CN112333881B (en) | 2020-10-15 | 2020-10-15 | Multi-LED luminous source control system |
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| CN112333881A true CN112333881A (en) | 2021-02-05 |
| CN112333881B CN112333881B (en) | 2022-05-03 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101155454A (en) * | 2006-09-30 | 2008-04-02 | 唯冠科技（深圳）有限公司 | Multi-light tube current control method and driving circuit thereof |
| US20140210349A1 (en) * | 2013-01-30 | 2014-07-31 | Delta Electronics, Inc. | Light-emitting device and control method of the same |
| CN104468134A (en) * | 2014-12-02 | 2015-03-25 | 国家电网公司 | Method for improving efficiency of communication power supply system |
| CN111263387A (en) * | 2020-02-28 | 2020-06-09 | 佛山科学技术学院 | Wireless sensor network exception handling method and system |
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2020
- 2020-10-15 CN CN202011103579.6A patent/CN112333881B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101155454A (en) * | 2006-09-30 | 2008-04-02 | 唯冠科技（深圳）有限公司 | Multi-light tube current control method and driving circuit thereof |
| US20140210349A1 (en) * | 2013-01-30 | 2014-07-31 | Delta Electronics, Inc. | Light-emitting device and control method of the same |
| CN104468134A (en) * | 2014-12-02 | 2015-03-25 | 国家电网公司 | Method for improving efficiency of communication power supply system |
| CN111263387A (en) * | 2020-02-28 | 2020-06-09 | 佛山科学技术学院 | Wireless sensor network exception handling method and system |
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| CN112333881B (en) | 2022-05-03 |
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