CN107371300B - A kind of antinoise LED light source dimming control system - Google Patents
A kind of antinoise LED light source dimming control system Download PDFInfo
- Publication number
- CN107371300B CN107371300B CN201710839914.0A CN201710839914A CN107371300B CN 107371300 B CN107371300 B CN 107371300B CN 201710839914 A CN201710839914 A CN 201710839914A CN 107371300 B CN107371300 B CN 107371300B
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- current
- led light
- light source
- control unit
- drive circuits
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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
- H05B45/395—Linear regulators
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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
-
- 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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of antinoise LED light source dimming control systems.Light-adjusting module, including control unit, resistance current-limiting circuit and PWM constant-current drive circuits, described control unit is electrically connected with resistance current-limiting circuit and PWM constant-current drive circuits, LED light source is electrically connected with resistance current-limiting circuit and PWM constant-current drive circuits, signal acquisition module, including AD conversion unit, voltage sensor, ambient light sensor and timer conter, current conversion module, including alternating current and AC/DC converters.When being fallen between 200Hz to 20kHz using the frequency of control unit and the pwm signal of timer conter calculating control LED light source brightness, control unit control disconnects PWM constant-current drive circuits, it opens resistance current-limiting circuit to dim LED light source by the way of linearity light adjusting, the drawbacks of generating noise is dimmed to avoid pwm signal.
Description
Technical field
The present invention relates to LED to dim field, and in particular to a kind of antinoise LED light source dimming control system.
Background technology
With LED display in life using more and more common, people want LED display and its control technology
Ask higher and higher.A kind of LED light lighting system based on PWM light modulations in existing patent CN205378285U, including rectification circuit,
Alternating current is converted to direct current by output driving circuit, PWM light adjusting circuits and LED light emitting sources, rectification circuit, is sent into output driving
Circuit is core by the output voltage acted on through output driving circuit load on the brightness adjustment control chip of PWM light adjusting circuits
Piece provides power supply, and the pwm signal that brightness adjustment control chip is provided according to port determines that internal power switches on-off, changes
It is sent into the output current of LED light emitting sources.Break-make that the power switch of LED light string lower end is controlled by pwm signal is realized with this
Adjusting to LED light electric current, to realize the control to LED light brightness.
Although existing patent CN205378285U effectively controls LED using the break-make of the power switch of LED light string lower end
The brightness of lamp, but noise will produce when the frequency of pwm signal is between 200Hz to 20kHz based on PWM light regulating technologies, it gives
User brings unnecessary puzzlement.
Invention content
The purpose of the present invention is to provide a kind of antinoise LED light source dimming control systems, to solve above-mentioned background technology
The problem of middle proposition.
To achieve the above object, the present invention provides the following technical solutions：
Light-adjusting module comprising control unit, resistance current-limiting circuit and PWM constant-current drive circuits, described control unit with
Resistance current-limiting circuit and PWM constant-current drive circuits are electrically connected, LED light source and resistance current-limiting circuit and PWM constant-current drive circuits
It is electrically connected；
Signal acquisition module comprising AD conversion unit, voltage sensor, ambient light sensor and timer conter,
The AD conversion unit is electrically connected with voltage sensor, ambient light sensor, timer conter and control unit, the electricity
Pressure sensor is electrically connected with resistance current-limiting circuit, and the timer conter is electrically connected with PWM constant-current drive circuits；
Current conversion module comprising alternating current and AC/DC converters, the AC/DC converters respectively with alternating current and
Control unit is electrically connected；
Wherein, which is the frequency of the signal for the PWM that control LED light source is calculated using control unit and timer conter
When falling between 200Hz to 20Hz, control unit control disconnects PWM constant-current drive circuits, opens resistance current-limiting circuit and uses line
Property light modulation mode to LED light source dim.
Preferably, described control unit is AT89S51 microcontrollers.
Preferably, the AD conversion unit is integrated with signal amplifier, voltage A/D converter and light A/D converter.
Preferably, the parallel regulator using triode as dynamic adjustable resistance is used to carry out in the resistance current-limiting circuit
Linear regulation.
Compared with prior art, the beneficial effects of the invention are as follows：
It is fallen using the frequency of control unit and the pwm signal of timer conter calculating control LED light source brightness and is arrived in 200Hz
When between 20kHz, control unit control disconnects PWM constant-current drive circuits, opens the side that resistance current-limiting circuit uses linearity light adjusting
Formula dims LED light source, and the drawbacks of generating noise is dimmed to avoid pwm signal.
Description of the drawings
Fig. 1 is the antinoise LED light source dimming control system structural schematic diagram of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, light-adjusting module, including control unit, resistance current-limiting circuit and PWM constant-current drive circuits, control are single
Member is electrically connected with resistance current-limiting circuit and PWM constant-current drive circuits, and LED light source drives with resistance current-limiting circuit and PWM constant currents
Circuit is electrically connected.Signal acquisition module, including AD conversion unit, voltage sensor, ambient light sensor and timer counter
Device, AD conversion unit are electrically connected with voltage sensor, ambient light sensor, timer conter and control unit, and voltage passes
Sensor is electrically connected with resistance current-limiting circuit, and timer conter is electrically connected with PWM constant-current drive circuits.Current conversion module,
Including alternating current and AC/DC converters, AC/DC converters are electrically connected with alternating current and control unit respectively.Control unit is
AT89S51 microcontrollers, D/A conversion unit are integrated with signal amplifier, voltage A/D converter and light A/D converter, resistance limit
It is used in current circuit using triode as the parallel regulator of dynamic adjustable resistance into horizontal-linearity control.
After antinoise LED light source dimming control system starts, alternating current is to be entirely after the conversion of AC/DC converters
System power supply, ambient light sensor, voltage sensor and timer conter distinguish real-time monitoring of environmental luminous intensity, resistance current-limiting circuit
Voltage and in the unit interval PWM constant-current drive circuits break-make number, and by corresponding information by analog-to-digital conversion module pass
Pass control unit.Control unit is dimmed according to ambient light intensity determination, according to the break-make frequency of PWM constant-current drive circuits
Namely the frequency of pwm signal judges to adjust LED light source using resistance current-limiting circuit.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (4)
1. a kind of antinoise LED light source dimming control system, which is characterized in that including：
Light-adjusting module comprising control unit, resistance current-limiting circuit and PWM constant-current drive circuits, described control unit and resistance
Current-limiting circuit and PWM constant-current drive circuits are electrically connected, and LED light source and resistance current-limiting circuit and PWM constant-current drive circuits are electrical
Connection；
Signal acquisition module comprising AD conversion unit, voltage sensor, ambient light sensor and timer conter, it is described
AD conversion unit is electrically connected with voltage sensor, ambient light sensor, timer conter and control unit, and the voltage passes
Sensor is electrically connected with resistance current-limiting circuit, and the timer conter is electrically connected with PWM constant-current drive circuits；
Current conversion module comprising alternating current and AC/DC converters, the AC/DC converters respectively with alternating current and control
Unit is electrically connected；
Wherein, which is that the frequency of the signal for the PWM that control LED light source is calculated using control unit and timer conter is fallen
When between 200Hz to 20Hz, control unit control disconnects PWM constant-current drive circuits, opens resistance current-limiting circuit and is adjusted using linear
The mode of light dims LED light source.
2. a kind of antinoise LED light source dimming control system according to claim 1, which is characterized in that the control is single
Member is AT89S51 microcontrollers.
3. a kind of antinoise LED light source dimming control system according to claim 1, which is characterized in that the modulus turns
It changes unit and is integrated with signal amplifier, voltage A/D converter and light A/D converter.
4. a kind of antinoise LED light source dimming control system according to claim 1, which is characterized in that the resistance limit
It is used in current circuit using triode as the parallel regulator of dynamic adjustable resistance into horizontal-linearity control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710839914.0A CN107371300B (en) | 2017-09-18 | 2017-09-18 | A kind of antinoise LED light source dimming control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710839914.0A CN107371300B (en) | 2017-09-18 | 2017-09-18 | A kind of antinoise LED light source dimming control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107371300A CN107371300A (en) | 2017-11-21 |
| CN107371300B true CN107371300B (en) | 2018-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710839914.0A Active CN107371300B (en) | 2017-09-18 | 2017-09-18 | A kind of antinoise LED light source dimming control system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108777133A (en) * | 2018-06-26 | 2018-11-09 | 广州视源电子科技股份有限公司 | A kind of light adjusting circuit, backlight module and liquid crystal display |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932159A (en) * | 2009-06-23 | 2010-12-29 | 启攀微电子（上海）有限公司 | Adaptive dimming control method for light emitting diode (LED) |
| CN104053283A (en) * | 2014-06-20 | 2014-09-17 | 陕西亚成微电子股份有限公司 | LED dimming control circuit |
-
2017
- 2017-09-18 CN CN201710839914.0A patent/CN107371300B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932159A (en) * | 2009-06-23 | 2010-12-29 | 启攀微电子（上海）有限公司 | Adaptive dimming control method for light emitting diode (LED) |
| CN104053283A (en) * | 2014-06-20 | 2014-09-17 | 陕西亚成微电子股份有限公司 | LED dimming control circuit |
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| CN107371300A (en) | 2017-11-21 |
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Effective date of registration: 20200624 Address after: 342800 Ningdu County Industrial Park, Jiangxi, Ganzhou Patentee after: Ganzhou Weixing Technology Equipment Co.,Ltd. Address before: 230088 electronic building B-05, Anhui University science and Technology Park, 2 Tianda Road, Hefei high tech Zone, Anhui Patentee before: HEFEI GUANSHUO INFORMATION TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20211008 Address after: 341706 Lingde wisdom Park, Xinzhen Industrial Park, Longnan economic and Technological Development Zone, Longnan City, Ganzhou City, Jiangxi Province Patentee after: Jiangxi chuangju Electronic Technology Co.,Ltd. Address before: 342800 Industrial Park, Ningdu County, Ganzhou City, Jiangxi Province Patentee before: Ganzhou Weixing Technology Equipment Co.,Ltd. |
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Denomination of invention: An anti noise LED light source dimming control system Effective date of registration: 20230324 Granted publication date: 20181023 Pledgee: Agricultural Bank of China Limited Longnan Sub branch Pledgor: Jiangxi chuangju Electronic Technology Co.,Ltd. Registration number: Y2023980036134 |
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