CN206260115U - A kind of LED light adjusting circuits based on digital regulation resistance - Google Patents
A kind of LED light adjusting circuits based on digital regulation resistance Download PDFInfo
- Publication number
- CN206260115U CN206260115U CN201621454671.6U CN201621454671U CN206260115U CN 206260115 U CN206260115 U CN 206260115U CN 201621454671 U CN201621454671 U CN 201621454671U CN 206260115 U CN206260115 U CN 206260115U
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- China
- Prior art keywords
- digital regulation
- regulation resistance
- led light
- led
- drive module
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- 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]
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Led Devices (AREA)
Abstract
The utility model discloses a kind of LED light adjusting circuits based on digital regulation resistance, including MCU controllers, digital regulation resistance, LED drive module, LED light source and power module, MCU controllers connect multi-disc digital regulation resistance, digital regulation resistance connection LED drive module by bus, LED drive module connects LED light source, and MCU controllers control the chip selection signal mouthful of digital regulation resistance by control mouth PA0, PA1, PA2 respectively, glide direction control signal mouthful U/And slide control signal mouthful, address selection terminal A0, A1, A2, A3 of digital regulation resistance terminate to the brightness adjustment control end RSET of LED drive module by connecting geocoding of the 4-bit DIP switch S realizations to the digital regulation resistance, the output of digital regulation resistance.
Description
Technical field：The utility model is related to the light adjusting circuit of LED, more particularly, to a kind of based on digital regulation resistance
LED light adjusting circuits.
Technical background：
LED as emerging light source, excellent performance, with luminous efficiency it is high, power consumption is few, long service life, light colour purity, steady
The incomparable superiority of many conventional light sources such as qualitative higher, environmental protection, thus in today's society, LED is in illumination, photoelectricity
All many-sides such as detection, medical science are widely used.LED is used as a kind of light emitting diode, and the electricity with diode is special
Property, although traditional LED constant current drives technology maturation simple, it has the disadvantage once circuit design completion, driving current and fixation
It is constant, there is light decay in LED or need the occasion being adjusted to LED luminance to be then difficult to change LED driving electricity as needed
Stream.It is higher to controller requirement although more conventional PWM light regulating technologies can be adjusted to LED luminance at present, by
Switching Power Supply principle is all based in general LED driver, if the frequency of PWM light modulations is between 200 ~ 20kHz, LED drives
Inductance and output capacitance around device easily produce the noise that human ear is heard.Additionally, when PWM light modulations are carried out, Regulate signal
Frequency and LED drive chip to the frequency of grid control signal closer to, linear effects are poorer, simultaneous reactions postpone be also
One design challenge of PWM light modulations, this delay not only influences whether contrast, while also affecting LED regulations to mesh
Mark the time of level.
Utility model content：
The utility model proposes a kind of LED light adjusting circuits based on digital regulation resistance, the driving of LED can be preferably adjusted
Electric current, realizes the Based Intelligent Control to LED light intensity.
A kind of LED light adjusting circuits based on digital regulation resistance, including MCU controllers, digital regulation resistance, LED drive mould
Block, LED light source and power module, MCU controllers connect multi-disc digital regulation resistance, digital regulation resistance connection by bus
LED drive module, LED drive module connection LED light source, MCU controllers control numeral respectively by control mouth PA0, PA1, PA2
The chip selection signal mouthful of potentiometer, glide direction control signal mouthful U/And slide control signal mouthful, digital regulation resistance
Address selection terminal A0, A1, A2, A3 realized to the geocoding of the digital regulation resistance, number by connecting 4-bit DIP switch S
The output of word potentiometer terminates to the brightness adjustment control end RSET of LED drive module.
The beneficial effects of the utility model:
（1）The utility model simple structure, with low cost, technology maturation, the possibility with extensive exploitation application.
（2）Digital regulation resistance has good stability compared with tradition machinery potentiometer, easy to operate, and noise is small, long service life
The advantages of, the reliability of the LED drive circuit being further ensured that.
（3）MCU controllers can drive output current by digital regulation resistance output resistance size control realization to LED
Based Intelligent Control.
Brief description of the drawings：
Fig. 1 is that the utility model system constitutes sketch.
Fig. 2 is the utility model typical application circuit sketch.
Fig. 3 is the multi-disc cascade sketch of digital regulation resistance.
Fig. 4 is the LED light adjusting circuit sketches based on digital regulation resistance.
Specific embodiment：
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and implementation
Example is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only used to explain
The utility model, is not used to limit the utility model.
Fig. 1 is that system of the present utility model constitutes sketch, and the utility model includes power module, MCU controllers, numeral electricity
Position device, LED drive module, LED light source.The size and then change LED of the output resistance of MCU controllers control digital regulation resistance are driven
Move the pull down resistor of device output current control pin to realize the control to LED driver output current, and then realize to LED light
The Intelligent adjustment of source brightness and control.When in use, the original intensity of LED light source is set to its maximum brightness value Cd's
80% or so, while by its this numerical value（0.8Cd）Record as Benchmark brightness value in MCU controllers, while MCU controllers connect
A luminous intensity inductor is connect, after a period of time, LED light intensity has been decayed, later value sets less than certain when decaying
After fixed scope, luminous intensity inductor is sensed after decay, passes the signal along to MCU controllers, MUC controllers control number
The output resistance of word potentiometer and then change the pull down resistor of LED driver output current control pin and increase LED driver
Output current, so that LED light intensity increases, returns to initial set value（0.8Cd）, and then the one of its luminous intensity can be kept
Cause property.
Fig. 2 is the sketch controlled by bus mode reality LED drive moduleization of the present utility model, and MCU main controls can
Connect by the way that the digital regulation resistance such as I2C EBIs or three line plus/minus formula serial line interfaces or spi bus interface or one-wire interface is conventional
Cause for gossip shows to the control of digital regulation resistance output resistance or the control of multi-disc digital appliances and then the multigroup LED drive module of control,
The MCU that the utility model has stronger autgmentability, monolithic can control multiple digital regulation resistances to adjust drive by EBI
The LED module of streaming current.Fig. 3 is the multi-disc cascade sketch of digital regulation resistance.The typical case that Fig. 4 sheets are given for the utility model
The LED light adjusting circuit sketches based on digital regulation resistance, such as Fig. 4, U1 be MCU controllers, MCU controllers by control mouth PA0,
PA1, PA2 control the chip selection signal of U2 digital regulation resistances respectively, glide direction control signal U/And slide control signal.There is the digital regulation resistance of EBI for some, MCU can be realized to polylith numeral current potential by way of bus
The control of device, and then realize carrying out multiple LED drive modules brightness adjustment control, such as Fig. 4 provides a kind of MCU by the total line traffic controls of I2C
Clock is walked in the example of the multiple LED light-adjusting modules based on digital regulation resistance of system, wherein SDA connection serial data lines, SCL connections
Line, SCL and SDA are two-way I/O lines, and they must be followed by positive supply plus pull-up resistor, on R5, the R6 and+5V in such as Fig. 4
Draw power supply.A0, A1, A2, A3 in the address selection terminal such as Fig. 4 of digital regulation resistance can by connect 4-bit DIP switch S1 with
And pull-up positive supply realizes the geocoding to the digital regulation resistance, so as to realize MCU to its more effective more convenient control.
Brightness adjustment control the end RSET, MCU that the output of digital regulation resistance terminates to LED drive chip U3 are exported by controlling digital regulation resistance
Resistance realizes the light modulation of LED.
Claims (1)
1. a kind of LED light adjusting circuits based on digital regulation resistance, it is characterised in that including MCU controllers, digital regulation resistance,
LED drive module, LED light source and power module, MCU controllers connect multi-disc digital regulation resistance, numeral electricity by bus
Position device connection LED drive module, LED drive module connection LED light source, MCU controllers are distinguished by control mouth PA0, PA1, PA2
Control the chip selection signal mouthful of digital regulation resistance, glide direction control signal mouthful U/And slide control signal mouthful, number
Address selection terminal A0, A1, A2, A3 of word potentiometer are by connecting ground of the 4-bit DIP switch S realizations to the digital regulation resistance
Location encodes, and the output of digital regulation resistance terminates to the brightness adjustment control end RSET of LED drive module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621454671.6U CN206260115U (en) | 2016-12-28 | 2016-12-28 | A kind of LED light adjusting circuits based on digital regulation resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621454671.6U CN206260115U (en) | 2016-12-28 | 2016-12-28 | A kind of LED light adjusting circuits based on digital regulation resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206260115U true CN206260115U (en) | 2017-06-16 |
Family
ID=59030512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621454671.6U Expired - Fee Related CN206260115U (en) | 2016-12-28 | 2016-12-28 | A kind of LED light adjusting circuits based on digital regulation resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206260115U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107770903A (en) * | 2016-12-28 | 2018-03-06 | 江苏博权医疗科技有限公司 | A kind of LED light adjusting circuits based on digital regulation resistance |
-
2016
- 2016-12-28 CN CN201621454671.6U patent/CN206260115U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107770903A (en) * | 2016-12-28 | 2018-03-06 | 江苏博权医疗科技有限公司 | A kind of LED light adjusting circuits based on digital regulation resistance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170616 Termination date: 20211228 |