CN104540291B - Light-emitting device and control method - Google Patents
Light-emitting device and control method Download PDFInfo
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- CN104540291B CN104540291B CN201410850520.1A CN201410850520A CN104540291B CN 104540291 B CN104540291 B CN 104540291B CN 201410850520 A CN201410850520 A CN 201410850520A CN 104540291 B CN104540291 B CN 104540291B
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- luminous
- photophore
- luminescence unit
- light
- derailing switch
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Abstract
The present invention relates to a kind of light-emitting device and control method, including：Luminescence unit, constant-current drive circuit, controller；Electrically connected after the series connection of at least two luminescence units with constant-current drive circuit, luminescence unit includes luminous branch road and bypass branch, luminous branch road and bypass branch are connected in parallel, there is photophore on luminous branch road, there is derailing switch on bypass branch, derailing switch has signal input part, and controller has signal output part, signal input part docks with signal output part, and controller is used for the conducting and cut-off of controlling switch device.Powered using single constant-current driving power supply for multiple photophores, it is simple in construction, easy to control, by controlling different photochromic photophores, it is precisely controlled light-emitting device and different colors is presented.
Description
Technical field
The present invention relates to a kind of light-emitting device and control method.
Background technology
Existing LED, it is to use a string of LED lamp beads of a driving power, the brightness of all lamp beads is identical, it is impossible to single
Single lamp bead brightness is solely controlled to realize light mixing effect.Reach the effect of mixed light, different photochromic lamp bead illuminated in combination is presented not
With color, it is necessary to coordinate multiple lamp beads using multiple driving powers, each driving power only drives a lamp bead, causes equipment superfluous
It is remaining, and multiple power supply caloric values are big, and when the lamp bead for needing to dim is more, caloric value is bigger, constrains the hair of LED mixed light
Exhibition, and cause energy dissipation.
The content of the invention
Based on this, the present invention discloses a kind of light-emitting device, is powered using single constant-current driving power supply for multiple photophores, knot
Structure is simple, easy to control, by controlling different photochromic photophores, is precisely controlled light-emitting device and different colors is presented.
Its technical scheme is as follows：
A kind of light-emitting device, including：Luminescence unit, constant-current drive circuit, controller；After the series connection of at least two luminescence units
Electrically connected with constant-current drive circuit, luminescence unit includes luminous branch road and bypass branch, and luminous branch road and bypass branch are in parallel even
Connect, have photophore on luminous branch road, have derailing switch on bypass branch, derailing switch has signal input part, and controller has signal output
End, signal input part dock with signal output part, and controller is used for the conducting and cut-off of controlling switch device.
A kind of light-emitting device control method, control each luminescence unit luminous time, different photochromic luminescence unit groups
Close the different color of luminous presentation；For each luminescence unit, controller to derailing switch send the first signal when, derailing switch cut
Only, bypass branch disconnects, and the electric current for flowing through luminescence unit flows through from luminous branch road, and photophore lights；Controller is sent out to derailing switch
When going out secondary signal, derailing switch conducting, bypass branch turns on, and the electric current for flowing through luminescence unit flows through from bypass branch, and light branch
Road does not have electric current to flow through, and photophore extinguishes.
In one of the embodiments, the derailing switch includes MOSFET pipes and corresponding drive module, described
MOSFET is managed and drive module electrical connection.
In one of the embodiments, the photophore is light emitting diode.
In one of the embodiments, the luminous photochromic difference of each photophore.
In one of the embodiments, the controller sends pulse width modulating signal, the pulse width modulation letter
Number include first signal and the secondary signal.
In one of the embodiments, it is characterised in that when any luminescence unit is luminous, remaining luminescence unit extinguishes.
The advantages of below to preceding solution or principle illustrate：
1st, light-emitting device includes：Luminescence unit, constant-current drive circuit, controller；At least two luminescence units series connection after with
Constant-current drive circuit is electrically connected, and luminescence unit includes luminous branch road and bypass branch, and luminous branch road and bypass branch are connected in parallel,
The electric current of luminescence unit is flowed through equal to flowing through the electric current of luminous branch road and flowing through the electric current sum of bypass branch, bypass branch plays
To the shunting action for the branch road that lights, due to using constant current-supplying, controlling the electric current can of bypass branch to control luminous branch road
Electric current；
There is photophore on luminous branch road, when luminous branch road has the electric current to flow through, photophore lights, and luminous branch road does not have electric current stream
Out-of-date, photophore extinguishes；
There is derailing switch on bypass branch, derailing switch is used for the conducting and disconnection for controlling bypass branch, and derailing switch has signal defeated
Enter end, controller has signal output part, and signal input part docks with signal output part, and controller is used for the conducting of controlling switch device
And cut-off, controller control the electric current of bypass branch by controlling switch device, and then the electric current of luminous branch road is controlled, be achieved in that
The control to be lighted to photophore；
For whole light-emitting device, each luminescence unit luminous time, different photochromic luminescence unit combination hairs are controlled
Different colors is presented in light；
For each luminescence unit, controller to derailing switch send the first signal when, derailing switch cut-off, bypass branch breaks
Open, the electric current for flowing through luminescence unit flows through from luminous branch road, and photophore lights；Controller to derailing switch send secondary signal when,
Derailing switch turns on, and bypass branch conducting, the electric current for flowing through luminescence unit flows through from bypass branch, and luminous branch road does not have electric current stream
Cross, photophore extinguishes.
2nd, the photophore is light emitting diode；The derailing switch includes MOSFET pipes and corresponding drive module,
The MOSFET pipes and drive module electrical connection；The controller sends pulse width modulating signal, the pulse width
Modulated signal includes first signal and the secondary signal；
The brightness of lumination of light emitting diode and the relation of electric current are that nonlinear, small current fluctuation will result in luminous two
Pole pipe luminance deviation is very big, therefore, is controlled it using pulse width modulating signal, is lighted to control light emitting diode
Time, when light emitting diode is lighted it is luminous when, its electric current is fixed, can be to mixed light with this so its brightness is fixed
Afterwards photochromic is precisely controlled.
3rd, the luminous photochromic difference of each photophore, because being controlled using pulse width modulating signal, institute
With according to the photochromic of the overall luminous photochromic and each photophore of setting light-emitting device, calculate the photochromic photophore light it is bright
Degree；And then according to photophore brightness and the relation of electric current, fluorescent lifetime and the fall time of photophore are calculated, fluorescent lifetime is set
For the deadline of derailing switch, the fall time is set to the ON time of derailing switch, and the photochromic different, brightness of each photophore is not
Together, abundant color is presented in combination.
4th, when any luminescence unit is luminous, remaining luminescence unit extinguishes；Because the electric current of LED light emitter is flowed through to LED
The photochromic of photophore has an impact, therefore the luminescence unit of series connection is powered using constant-current drive circuit, when any luminescence unit is sent out
Light time, its glow current immobilize, and ensure that its brightness is constant, photochromic constant, and when any luminescence unit is luminous, remainder is luminous
Unit extinguishes so that the electric current of each luminescence unit is constant, realizes photochromic to mixed light be precisely controlled；
Also, constant-current supply is only powered to single luminescence unit every time, can be next when last luminescence unit extinguishes
Luminescence unit is powered, and constant-current drive circuit load is more stable, makes mixed light accurate；
In addition, constant-current drive circuit is powered to single luminescence unit in real time, without energy dissipation, utilization rate of equipment and installations is improved.
Brief description of the drawings
Fig. 1 is the structural representation of light-emitting device of the embodiment of the present invention.
Description of reference numerals：
100th, light emitting diode, 210, MOSFET pipes, 220, gate driving circuit.
Embodiment
Embodiments of the invention are described in detail below：
Light-emitting device includes：Luminescence unit, constant-current drive circuit, controller.
Electrically connected after three luminescence unit series connection with constant-current drive circuit.
Luminescence unit includes luminous branch road and bypass branch, and luminous branch road and bypass branch are connected in parallel.
There is photophore on luminous branch road, photophore is light emitting diode 100, and each light emitting diode 100 lights photochromic
Different difference.
There is derailing switch on bypass branch, derailing switch includes MOSFET pipes 210 and corresponding gate driving circuit 220,
MOSFET pipes 210 and gate driving circuit 220 electrically connect, and gate driving circuit 220 drives MOSFET pipes 210.
Derailing switch has signal input part, and controller has signal output part, and signal input part docks with signal output part, control
Device sends control signal, the conducting and cut-off of control MOSFET pipes 210 to gate driving circuit 220.
When being controlled to light-emitting device：
Controller sends pulse width modulating signal, and pulse width modulating signal includes the first signal and secondary signal, control
Make each luminescence unit luminous time, different colors is presented in different photochromic luminescence unit illuminated in combination；
For each luminescence unit, controller to derailing switch send the first signal when, derailing switch cut-off, make bypass branch
Disconnect, the electric current for flowing through luminescence unit flows through from luminous branch road, and photophore lights；Controller sends secondary signal to derailing switch
When, derailing switch conducting, turn on bypass branch, the electric current for flowing through luminescence unit flows through from bypass branch, and the branch road that lights is without electricity
Stream flows through, and photophore extinguishes；
When any luminescence unit is luminous, remaining luminescence unit extinguishes.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the embodiment of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.
Claims (4)
- A kind of 1. light-emitting device, it is characterised in that including：Luminescence unit, constant-current drive circuit, controller；Electrically connected after the series connection of at least two luminescence units with constant-current drive circuit, luminescence unit includes luminous branch road and bypass branch Road, luminous branch road and bypass branch are connected in parallel, have photophore on luminous branch road, have derailing switch on bypass branch, derailing switch has Signal input part, controller have signal output part, and signal input part docks with signal output part, and controller sends pulse width tune The conducting and cut-off of Signal-controlled switch device processed, according to the light of the overall luminous photochromic and each photophore of setting light-emitting device Color, the luminous brightness of the photochromic photophore is calculated, and then according to photophore brightness and the relation of electric current, calculate the luminous of photophore Time and fall time, fluorescent lifetime are set to the deadline of derailing switch, and the fall time is set to the ON time of derailing switch, constant current Drive circuit is only powered to single luminescence unit every time, the luminous photochromic difference of each photophore.
- 2. light-emitting device according to claim 1, it is characterised in that the derailing switch includes MOSFET and manages and correspond to therewith Drive module, MOSFET pipe and drive module electrical connection.
- 3. light-emitting device according to claim 1, it is characterised in that the photophore is light emitting diode.
- A kind of 4. light-emitting device control method, it is characterised in that：Controller sends pulse width modulating signal, according to the light of the overall luminous photochromic and each photophore of setting light-emitting device Color, the luminous brightness of the photochromic photophore is calculated, and then according to photophore brightness and the relation of electric current, calculate the luminous of photophore Time and fall time, fluorescent lifetime are set to the deadline of derailing switch, and the fall time is set to the ON time of derailing switch, control Each luminescence unit luminous time, different colors is presented in different photochromic luminescence unit illuminated in combination, when any luminous list When member is luminous, remaining luminescence unit extinguishes；Pulse width modulating signal includes the first signal and secondary signal, and for each luminescence unit, controller is to derailing switch When sending the first signal, derailing switch cut-off, bypass branch disconnects, and the electric current for flowing through luminescence unit flows through from luminous branch road, lights Device lights；Controller to derailing switch send secondary signal when, derailing switch conducting, bypass branch conducting, flow through the electricity of luminescence unit Stream flows through from bypass branch, and luminous branch road does not have electric current to flow through, and photophore extinguishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850520.1A CN104540291B (en) | 2014-12-30 | 2014-12-30 | Light-emitting device and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410850520.1A CN104540291B (en) | 2014-12-30 | 2014-12-30 | Light-emitting device and control method |
Publications (2)
| Publication Number | Publication Date |
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| CN104540291A CN104540291A (en) | 2015-04-22 |
| CN104540291B true CN104540291B (en) | 2017-12-29 |
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| CN201410850520.1A Active CN104540291B (en) | 2014-12-30 | 2014-12-30 | Light-emitting device and control method |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4241487B2 (en) * | 2004-04-20 | 2009-03-18 | ソニー株式会社 | LED driving device, backlight light source device, and color liquid crystal display device |
| TWI433588B (en) * | 2005-12-13 | 2014-04-01 | Koninkl Philips Electronics Nv | Led lighting device |
| RU2461094C1 (en) * | 2008-07-15 | 2012-09-10 | Шарп Кабусики Кайся | Light-emitting device drive circuit |
| JP2011249377A (en) * | 2010-05-24 | 2011-12-08 | Panasonic Corp | Light source driving device, backlight device, and liquid crystal display device |
| CN202759632U (en) * | 2012-06-20 | 2013-02-27 | 伟思科技控股有限公司 | Drive circuit and lighting device of light emitting diode |
| CN204425710U (en) * | 2014-12-30 | 2015-06-24 | 广州市珠江灯光科技有限公司 | Light-emitting device |
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| CN104540291A (en) | 2015-04-22 |
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