CN110213859A - A kind of light adjusting circuit and lighting device - Google Patents
A kind of light adjusting circuit and lighting device Download PDFInfo
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- CN110213859A CN110213859A CN201910578719.6A CN201910578719A CN110213859A CN 110213859 A CN110213859 A CN 110213859A CN 201910578719 A CN201910578719 A CN 201910578719A CN 110213859 A CN110213859 A CN 110213859A
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- current supply
- light adjusting
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- 230000005611 electricity Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 238000007639 printing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 230000009021 linear effect Effects 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
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Classifications
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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]
-
- 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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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The embodiment of the invention provides a kind of light adjusting circuits, constant-current supply, control unit including multiple parallel connections and distinguish concatenated switch, described control unit and switch connection with the constant-current supply.By similar constant-current supply used in parallel, multiple output size of current at the constant-current supply of preset rules and are linked to be a general supply, each constant-current supply is connected to a switch, the total current of output can be controlled by control switch, it is at low cost to achieve the purpose that light modulation, and dimming behavior is stablized.
Description
Technical field
The present invention relates to lighting technical fields, more particularly to a kind of light adjusting circuit and a kind of lighting device.
Background technique
LED has the advantages that energy conservation, service life are long and environmentally friendly, and in the application of LED, the adjusting of brightness has more common
Using, the brightness for adjusting LED is not only to play the role of energy-efficient, in industrial application, equally occupies an important position, such as
The stability influence for adjusting LED luminance has arrived the operation quality of printing industry ultraviolet LED printing ink solidifying lamp, and above-mentioned cure lamp is root
Adjust the ultraviolet ray intensity of cure lamp according to the color of ink, thickness, type and print speed printing speed, then ink is not or not intensity deficiency
Dry, intensity crosses conference, and paper is burnt, serious also to cause fire.
Existing LED light modulation includes three kinds of linearity light adjusting, controllable silicon light modulation and pulse width modulated dimmer modes.It is linear to adjust
Light is based on simple voltage divider principle, noiseless using simple；Controllable silicon light modulation is generally used in current energy-saving lamp application
Dimming mode, its advantage is that working efficiency is higher, performance is stablized；Pulse width modulated dimmer is usually used in high-power applications,
LED drive chip is adjusted to the grid control signal of power field effect pipe by changing input pulse signal dutyfactor, thus
Achieve the purpose that adjust LED current, the steady current that constant-current supply exports is changed to certain frequency by the control of make-and-break time
Rectangular wave, adjust the duty ratio (pro rate of on/off time) of rectangular wave to change average current intensity, to reach tune
The purpose of light, although LED can be flashed with the on-off of electric current, since the pulse signal frequency of pulse width modulated dimmer is
Thousands of to tens of thousands of hertz, have exceeded the range of eye recognition, so appearing to be continuous.The application of this light regulating technology is simple,
It is high-efficient, precision is high, good dimming effect.
But linearity light adjusting applies not flexible, inefficiency；The shortcomings that controllable silicon light modulation is to need electricity after controlled silicon conducting
Stream is held on, otherwise silicon-controlled can be restored to off state, if conducting electric current is not achieved in the electric current maintained, is connected just
Unstable, the waveform of output can generate trembling and spike, and it is unstable to will cause LED both end voltage, flash；Pulse width
Signal frequency and LED drive chip in modulation light modulation is closer to the frequency of the grid control signal of power field effect pipe, LED
Linear effects it is poorer；When driving power matches bad with pulse width modulation, it may appear that macroscopic stroboscopic increases
The cost and volume of driving power；Pulse width modulated dimmer frequency is generally several kHz to tens of thousands of hertz, in high current
In the case where driving multi-chip, the light output of LED is not the output of rectangular wave, can be severely deformed；No matter average current is how many,
The peak value of electric current rectangular wave is all maximum intensity, and is thousands of to tens of thousands of hertz of on-off, seriously affects the service life of LED.
Summary of the invention
In view of the above problems, it proposes the embodiment of the present invention and overcomes the above problem or at least partly in order to provide one kind
A kind of light adjusting circuit to solve the above problems and a kind of lighting device.
To solve the above-mentioned problems, the embodiment of the invention discloses a kind of light adjusting circuit, the Constant Electric Current including multiple parallel connections
Source, control unit and concatenated switch, described control unit and switch connection are distinguished with the constant-current supply.
Further, described control unit is made by the on-off of control switch, and the constant-current supply of the multiple parallel connection is defeated
Electric current is at preset ratio out.
Further, each constant-current supply output electric current of the constant-current supply of the multiple parallel connection is at Geometric Sequence.
Further, the various output electric currents of the constant-current supply of the multiple parallel connection are at arithmetic progression.
Further, the switch includes relay switch or switching circuit.
Further, described control unit includes single-chip microcontroller and touch screen, the touch screen and the monolithic mechatronics,
The single-chip microcontroller is electrically connected with the switch.
The embodiment of the invention discloses a kind of lighting device, including LED module and above-mentioned light adjusting circuit, the LED modules
It is electrically connected with light adjusting circuit.
The embodiment of the present invention includes following advantages: by similar constant-current supply used in parallel, by multiple output size of current
At preset rules constant-current supply and be linked to be a general supply, each constant-current supply is connected to a switch, just by control switch
The total current of controllable output, thus achieve the purpose that light modulation, it is at low cost, and dimming behavior is stablized.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of light adjusting circuit embodiment of the invention；
Fig. 2 is a kind of schematic diagram of another embodiment of light adjusting circuit of the invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
One of the core concepts of the embodiments of the present invention is, provides a kind of light adjusting circuit, the Constant Electric Current including multiple parallel connections
Source 2, control unit and concatenated switch is distinguished with constant-current supply 2, control unit is connected with switch.Pass through similar perseverance used in parallel
Multiple output size of current at the constant-current supply 2 of preset rules and are linked to be a general supply, each constant-current supply 2 by galvanic electricity source 2
It is connected to a switch, the total current of output can be controlled by control switch, thus achieve the purpose that light modulation, it is at low cost, and adjust
Optical property is stablized.
A kind of light adjusting circuit of the invention can specifically include constant-current supply 2, control unit and and the constant current of multiple parallel connections
Power supply 2 distinguishes concatenated switch, and control unit is connected with switch.In the present embodiment, multiple constant-current supplies 2 are used in parallel, often
It is all connected to switch on a constant-current supply 2, referring to Fig.1, in parallel using four constant-current supplies 2 in one embodiment, four perseverances
The output electric current in galvanic electricity source 2 is respectively 1A, 2A, 4A and 8A, and the electric current that above-mentioned constant-current supply 2 exports is successively at Geometric Sequence, often
Switch is all connected on a constant-current supply 2, above-mentioned switch is successively K1, K2, K3 and K4.Switching on and off for above-mentioned switch determines
Whether power supply participates in driving LED module 1, and above-mentioned LED (light emitting diode) mould group 1 is led to for providing the work such as illumination and solidification
It crosses the permutation and combination of aforementioned four switch being switched on or switched off, the available different electric currents from 0A to 15A are output to LED mould
Group 1, combination in total have 16 gears, each gear interval 1A, and the open close state of gear and switch is shown in Table 1, shadow part in table
Divide the switch connection state that indicates, blank parts indicate switch off state.Four switches are controlled by the single-chip microcontroller for being composed of program, are led to
The gear of input brightness is crossed, single-chip microcontroller can automatically select the open close state of each switch, to realize the tune of 1 brightness of LED module
Section.In one embodiment, increase all the way the constant-current supply 2 of 0.5A and one switch, so that it may realize it is finer from 0A to
The brightness regulation of 15.5A, a total of 32 gears, the interval every gear 0.5A.
The different output current that the permutation and combination of 1 four, table switches is realized
In the present embodiment, the constant-current supply 2 of multiple parallel connections exports electric current into preset ratio.In the present embodiment it is multiple simultaneously
The electric current that the constant-current supply 2 of connection exports is Geometric Sequence, and reference Fig. 2 shows one of the present embodiment light adjusting circuit, institute in figure
The electric current of the cure lamp maximum demand 31A of the 8 LED units composition shown, will above-mentioned 8 LED unit parallel connections in the present embodiment
A LED module 1 is formed, power supply mould group is formed by the constant-current supply 2 of 5 different output currents is in parallel, by above-mentioned electricity
Source mould group is connected with LED module 1, each power supply can drive each LED unit, the output electricity of above-mentioned 5 constant-current supplies 2
Stream is 1A, 2A, 4A, 8A and 16A respectively, and the electric current that above-mentioned constant-current supply 2 exports is connected at Geometric Sequence, each constant-current supply 2
One switch, the above-mentioned concatenated switch of constant-current supply 2 are successively K1, K2, K3, K4 and K5, and the open close decision of above-mentioned 5 switches should
Whether power supply participates in driving LED, and above-mentioned 5 switches use relay switch, switching circuit or the single-chip microcontroller for being composed of program, pass through
Brightness gear signal is inputted to single-chip microcontroller, and then automatically controls being switched on or switched off for respective switch, to realize the adjusting of light intensity.
Different output total currents is obtained by the permutation and combination of 5 switch on and off, output total current range is 0A to 31A, defeated
It includes 32 gears, every gear interval 1A, to obtain different LED luminous intensities that total current, which has altogether, out；In one embodiment,
The quantity for dimming gear, can be increased to 64 gears, each by the constant-current supply 2 and a switch that can increase a 0.5A
Gear interval 0.5A, the variation between adjacent gear less than 1.6% can be increased multiple by Geometric Sequence in other embodiments
The electric current of constant-current supply, output includes 0.25A, 0.125A etc., can successively increase the gear and precision of switch.
In the present embodiment, it is Geometric Sequence that the constant-current supply 2 of multiple parallel connections, which exports electric current,.It is N number of to be exported at Geometric Sequence
The constant-current supply 2 of electric current passes through the Nth power (i.e. 2 of permutation and combination available 2N) a different total current exports gear, these
The current strength of electric current gear is up to the sum of the electric current of all N number of power supplys, is divided between gear at arithmetic progression, minimum 0A
The electric current of minimum constant-current supply 2.
In the present embodiment, it is arithmetic progression that the constant-current supply 2 of multiple parallel connections, which exports electric current,.Constant Electric Current in light adjusting circuit
Source 2 exports electric current can not be since 0A, and the half that can choose maximum current in one embodiment starts, and passes through arrangement group
It closes and obtains a series of total currents at arithmetic progression and export, the selection of constant-current supply 2 is according to the maximum rated electricity of the LED driven
Depending on stream, the maximum rated current of LED is not to be exceeded in the output electric current summation of all constant-current supplies 2；The quantity root of constant-current supply 2
Depending on light modulation precision or numbers of gear steps；The permutation and combination of constant-current supply 2 is by each 2 branch of constant-current supply in the present embodiment
On switch control, there is a switch in each road, and switch is switched on or switched off the drive for determining whether the power supply participates in LED
It is dynamic；
In the present embodiment, switch includes relay switch or switching circuit.
In the present embodiment, control unit includes single-chip microcontroller and touch screen, touch screen and monolithic mechatronics, single-chip microcontroller with
Switch electrical connection.Switch uses relay switch, switching circuit or other components for playing on-off action, switchs by monolithic
The process control of machine inputs gear signal in single-chip microcontroller, and opening or disconnecting for procedure auto-control respective switch can pass through touch
Shield the input of the signal of Direct Digital input, voltage signal input or knob or variable resistance input realization light modulation.
In the present embodiment, constant-current supply 2 includes multiple parallel connection power supplies.When the electric current of some power supply changes, such as
The power supply reality output of 4A is 4.5A, the only current strength of the gear and the intensity of maximum current that above-mentioned variation influences,
Its variation does not influence the LED light strong consistency of entire lamp at all, and the variation of 0.5A is shared by all LED, is not
It is undertaken by certain a part of LED, avoids the light intensity in some region on LED and be apparently higher than other parts；When some LED appearance is short
When road or open circuit, generated Current Voltage variation is shared by all other LED on entire lamp, and otherness variation is small,
It is small on the influence of the light intensity consistency of entire lamp, it does not influence to produce, the complicated procedures for avoiding hard stop from replacing are improved using effect
Rate.
In one embodiment, the biggish constant-current supply of electric current is exported in constant-current supply 2 can not be a single power supply,
But be formed in parallel by several small power supplies, such as 8A constant-current supply 2 in examples detailed above can be by 8 1A power sources in parallel and
At the power supply of 16A can be formed by 8 2A power sources in parallel, by using the constant-current supply 2 of said combination formula, can be reduced into
This, reduces volume, while can reduce risk, for example the power supply of 16A is made of the power supply of 8 2A, even if a power supply is thorough
Damage does not work, and is also only the electric current for changing certain gears, maximum current is reduced 2A, if 16A constant-current supply 2 is
Single power supply, once half has dropped in the entire electric current that do not worked.
The constant-current supply 2 used in the present embodiment is also possible to straight in other embodiments for exchange input direct-current output
Input direct-current output is flowed, voltage of the electric current from 0A to maximum current when is always exported when output voltage range covers used in parallel
Range, above-mentioned constant-current supply 2 use isolated supplies, the power supply of non-isolation type can be used in other embodiments.
The embodiment of the invention discloses a kind of lighting device, including LED module 1 and above-mentioned light adjusting circuit, 1 Hes of LED module
Light adjusting circuit electrical connection.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device for including the element.
It needs above to a kind of light adjusting circuit provided by the present invention and lighting device, is described in detail, answers herein
With a specific example illustrates the principle and implementation of the invention, the explanation of above example is only intended to help to manage
Solve method and its core concept of the invention；At the same time, for those skilled in the art, according to the thought of the present invention,
There will be changes in specific embodiment and application range, in conclusion the content of the present specification should not be construed as to this hair
Bright limitation.
Claims (7)
1. a kind of light adjusting circuit, which is characterized in that constant-current supply, control unit including multiple parallel connections and with the constant-current supply
Concatenated switch respectively, described control unit and the switch connect.
2. light adjusting circuit according to claim 1, which is characterized in that described control unit is made by the on-off of control switch
The constant-current supply output electric current of the multiple parallel connection is obtained into preset ratio.
3. light adjusting circuit according to claim 1, which is characterized in that each constant current of the constant-current supply of the multiple parallel connection
Electric power outputting current is at Geometric Sequence.
4. light adjusting circuit according to claim 1, which is characterized in that the various outputs of the constant-current supply of the multiple parallel connection
Electric current is at arithmetic progression.
5. light adjusting circuit according to claim 1, which is characterized in that the switch includes relay switch or switch electricity
Road.
6. light adjusting circuit according to claim 1, which is characterized in that described control unit includes single-chip microcontroller and touch screen,
The touch screen and the monolithic mechatronics, the single-chip microcontroller are electrically connected with the switch.
7. a kind of lighting device, which is characterized in that including LED module and light modulation according to claim 1 to 6
Circuit, the LED module and light adjusting circuit electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910578719.6A CN110213859A (en) | 2019-06-28 | 2019-06-28 | A kind of light adjusting circuit and lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910578719.6A CN110213859A (en) | 2019-06-28 | 2019-06-28 | A kind of light adjusting circuit and lighting device |
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| Publication Number | Publication Date |
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| CN110213859A true CN110213859A (en) | 2019-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910578719.6A Pending CN110213859A (en) | 2019-06-28 | 2019-06-28 | A kind of light adjusting circuit and lighting device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101146387A (en) * | 2007-10-10 | 2008-03-19 | 昝昕武 | A car background optical constant current control drive system and drive control method |
| CN102117592A (en) * | 2009-12-30 | 2011-07-06 | 乐金显示有限公司 | Data transmitting device and flat plate display using the same |
| CN102573242A (en) * | 2012-02-17 | 2012-07-11 | 深圳市博驰信电子有限责任公司 | Notify light driving circuit and notify light driving chip |
| CN210469818U (en) * | 2019-06-28 | 2020-05-05 | 南京伯克利新材料科技有限公司 | Dimming circuit and lighting device |
-
2019
- 2019-06-28 CN CN201910578719.6A patent/CN110213859A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101146387A (en) * | 2007-10-10 | 2008-03-19 | 昝昕武 | A car background optical constant current control drive system and drive control method |
| CN102117592A (en) * | 2009-12-30 | 2011-07-06 | 乐金显示有限公司 | Data transmitting device and flat plate display using the same |
| CN102573242A (en) * | 2012-02-17 | 2012-07-11 | 深圳市博驰信电子有限责任公司 | Notify light driving circuit and notify light driving chip |
| CN210469818U (en) * | 2019-06-28 | 2020-05-05 | 南京伯克利新材料科技有限公司 | Dimming circuit and lighting device |
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Application publication date: 20190906 |