CN109121258A - A kind of light-dimming method and dimming device - Google Patents
A kind of light-dimming method and dimming device Download PDFInfo
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- CN109121258A CN109121258A CN201811191731.3A CN201811191731A CN109121258A CN 109121258 A CN109121258 A CN 109121258A CN 201811191731 A CN201811191731 A CN 201811191731A CN 109121258 A CN109121258 A CN 109121258A
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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]
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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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Abstract
The present invention provides a kind of light-dimming method and dimming devices, are related to display field.A kind of light-dimming method, including input the first pulse signal control first switch circuit is so that the first lamp bead is lighted or extinguished；The second pulse signal control second switch circuit is inputted so that the second lamp bead is lighted or extinguished；Third pulse signal control third switching circuit is inputted so that third lamp bead is lighted or extinguished；It inputs the 4th pulse signal and controls the 4th switching circuit so that the 4th lamp bead is lighted or extinguished；The 5th pulse signal is inputted, LED drive current is adjusted；So that at least one of the first lamp bead, the second lamp bead, third lamp bead and the 4th lamp bead are lighted, wherein, frequency of the frequency of 5th pulse signal less than the first pulse signal, the second pulse signal, third pulse signal and the 4th pulse signal, to adjust the brightness lighted in the first lamp bead, the second lamp bead, third lamp bead and the 4th lamp bead by LED drive current, increase the light modulation depth of LED lamp bead.
Description
Technical field
The present invention relates to display fields, in particular to a kind of light-dimming method and dimming device.
Background technique
Currently, it is common when carrying out light mixing using a variety of LED lamp beads on the market, in order to solve without visual stroboscopic problem, lead to
Often need by control LED lamp bead switching frequency setting 10KHz even more than, at this time with the raising of light modulating frequency, can go out
The case where now light modulation depth reduces, causes the minimum brightness of LED lamp bead to be in a high-value, influences user experience.
Summary of the invention
One of the objects of the present invention is to provide a kind of light-dimming methods, can increase the light modulation depth of LED lamp bead.
Another object of the present invention is to provide a kind of dimming devices, can increase the light modulation depth of LED lamp bead.
To achieve the goals above, the present invention provides a kind of technical solution:
The embodiment of the invention provides a kind of light-dimming method, the light-dimming method includes:
First pulse signal is inputted to first switch, controls the closure of the first switch circuit so that the first lamp bead point
It is bright, or the disconnection of the first switch circuit is controlled so that first lamp bead is extinguished, wherein first lamp bead and LED
Driving circuit connection, the first switch are in parallel with first lamp bead；
Second pulse signal is inputted to second switch, controls the closure of the second switch circuit so that the second lamp bead point
It is bright, or the control second switch circuit disconnection so that second lamp bead is extinguished, wherein second lamp bead with it is described
LED drive circuit connection, the second switch are in parallel with second lamp bead；
Input third pulse signal is switched to third, controls the closure of the third switching circuit so that third lamp bead point
It is bright, or the control third switching circuit disconnection so that the third lamp bead is extinguished, wherein the third lamp bead with it is described
LED drive circuit connection, the third switch are in parallel with the third lamp bead；
To the 4th switch the 4th pulse signal of input, the closure of the 4th switching circuit is controlled so that the 4th lamp bead point
It is bright, or control the 4th switching circuit disconnection so that the 4th lamp bead is extinguished, wherein the 4th lamp bead with it is described
LED drive circuit connection, the 4th switch are in parallel with the 4th lamp bead；
5th pulse signal is inputted to the LED drive circuit, adjusts LED drive current；So that first lamp bead,
At least one of two lamp beads, third lamp bead and the 4th lamp bead are lighted, wherein the frequency of the 5th pulse signal is less than described
The frequency of first pulse signal, the second pulse signal, third pulse signal and the 4th pulse signal, to be driven by the LED
The brightness lighted in first lamp bead, the second lamp bead described in current regulation, third lamp bead and the 4th lamp bead.
Further, the frequency of first pulse signal, the second pulse signal, third pulse signal and the 4th pulse signal
Rate is greater than preset value, and the frequency of the 5th pulse signal is less than preset value.
Further, the first pulse signal is inputted to first switch, controls the closure of the first switch circuit so that the
One lamp bead is lighted, or controls the disconnection of the first switch circuit so that in the step of first lamp bead is extinguished:
First lamp bead is the lamp bead to emit white light.
Further, the second pulse signal is inputted to second switch, controls the closure of the second switch circuit so that the
Two lamp beads are lighted, or control the disconnection of the second switch circuit so that in the step of second lamp bead is extinguished:
Second lamp bead is the lamp bead to glow.
Further, input third pulse signal is switched to third, controls the closure of the third switching circuit so that the
Three lamp beads are lighted, or control the disconnection of the third switching circuit so that in the step of third lamp bead is extinguished:
The third lamp bead is the lamp bead of green light.
Further, to the 4th switch the 4th pulse signal of input, the closure of the 4th switching circuit is controlled so that the
Four lamp beads are lighted, or control the disconnection of the 4th switching circuit so that in the step of the 4th lamp bead is extinguished:
4th lamp bead is the lamp bead of blue light-emitting.
Further, in the step of inputting the 5th pulse signal to the LED drive circuit, adjusting LED drive current:
The LED drive circuit is constant current output circuit.
The embodiment of the invention also provides a kind of dimming device, including controller, LED drive circuit, first switch and with
The first lamp bead of parallel connection, second switch and the second lamp bead in parallel therewith, third switch and third lamp bead in parallel therewith and
4th switch and the 4th lamp bead in parallel therewith, the controller are opened with the LED drive circuit, first switch, second respectively
Close, third switch and the 4th switch electrical connection, the LED drive circuit and the first switch, second switch, third switch and
4th switch electrical connection；
The controller to the first switch input the first pulse signal, control the closure of the first switch circuit with
The first lamp bead is lighted, or controls the disconnection of the first switch circuit so that first lamp bead is extinguished；
The controller to the second switch input the second pulse signal, control the closure of the second switch circuit with
The second lamp bead is lighted, or controls the disconnection of the second switch circuit so that second lamp bead is extinguished；
The controller to the third switch input third pulse signal, control the closure of the third switching circuit with
Third lamp bead is lighted, or controls the disconnection of the third switching circuit so that the third lamp bead is extinguished；
The controller to the 4th switch the 4th pulse signal of input, control the closure of the 4th switching circuit with
The 4th lamp bead is lighted, or controls the disconnection of the 4th switching circuit so that the 4th lamp bead is extinguished；
The controller inputs the 5th pulse signal to the LED drive circuit, adjusts LED drive current；So that described
At least one of first lamp bead, the second lamp bead, third lamp bead and the 4th lamp bead are lighted, wherein the 5th pulse signal
Frequency is less than the frequency of first pulse signal, the second pulse signal, third pulse signal and the 4th pulse signal, to pass through
The LED drive current adjusts the brightness lighted in first lamp bead, the second lamp bead, third lamp bead and the 4th lamp bead.
Further, the LED drive circuit is constant current output circuit.
Further, first lamp bead is the lamp bead to emit white light；Second lamp bead is the lamp bead to glow；Described
Three lamp beads are the lamp bead of green light；4th lamp bead is the lamp bead of blue light-emitting.
Compared with the existing technology, the beneficial effect of light-dimming method provided by the invention and dimming device is:
A kind of light-dimming method provided by the invention and dimming device, by inputting the first pulse signal, control to first switch
The closure of first switch circuit processed is so that the first lamp bead is lighted, or controls the disconnection of first switch circuit so that the first lamp bead is put out
It goes out；Second pulse signal is inputted to second switch, controls the closure of second switch circuit so that the second lamp bead is lighted, or is controlled
The disconnection of second switch circuit is so that the second lamp bead is extinguished；Input third pulse signal, control third switch electricity are switched to third
The closure on road is so that third lamp bead is lighted, or controls the disconnection of third switching circuit so that third lamp bead is extinguished；It opens the 4th
The 4th pulse signal of input is closed, controls the closure of the 4th switching circuit so that the 4th lamp bead is lighted, or control the 4th switchs electricity
The disconnection on road is so that the 4th lamp bead is extinguished；
By inputting the 5th pulse signal to LED drive circuit, LED drive current is adjusted；So that the first lamp bead, the second lamp
At least one of pearl, third lamp bead and the 4th lamp bead are lighted, wherein the frequency of the 5th pulse signal is believed less than the first pulse
Number, the frequency of the second pulse signal, third pulse signal and the 4th pulse signal, adjust the first lamp to pass through LED drive current
The brightness lighted in pearl, the second lamp bead, third lamp bead and the 4th lamp bead increases the light modulation depth of LED lamp bead.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the circuit diagram for the dimming device that the embodiment of the present invention one provides；
Fig. 2 is the flow chart of light-dimming method provided by Embodiment 2 of the present invention.
Icon: 1- dimming device；10-LED driving circuit；20- controller；The first lamp bead of 31-；The second lamp bead of 32-；33-
Third lamp bead；The 4th lamp bead of 34-；41- first switch；42- second switch；43- third switch；44- the 4th is switched；50- sampling
Resistance；60- inductor；100- light-dimming method.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it is to be understood that, the instructions such as term " center ", "upper", "lower", "inner", "outside"
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when usually put
The orientation or positional relationship that orientation or positional relationship or those skilled in the art usually understand is merely for convenience of describing
The present invention and simplified description, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, with specific
Orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second ", " third ", " the 4th " etc. are only used for distinguishing description, and should not be understood as indicating
Or imply relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" opening up ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to detachably connect
It connects, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediate matchmaker can also be passed through
Jie is indirectly connected, and can be the connection inside two elements.It for the ordinary skill in the art, can be with concrete condition
Understand the concrete meaning of above-mentioned term in the present invention.
Embodiment one
Referring to Fig. 1, Fig. 1 show the circuit diagram of the dimming device 1 of the offer of the embodiment of the present invention one.Dimming device
1 is mainly used for adjusting the brightness of LED lamp bead, is a kind of device for facilitating user's adjusting that different LED lamp beads are carried out with light mixing.This reality
The dimming device 1 for applying example offer increases the light modulation depth of LED lamp bead, while also solving the problems, such as without visual stroboscopic.
Dimming device 1 include controller 20, LED drive circuit 10, first switch 41 and the first lamp bead 31 in parallel therewith,
Second switch 42 and the second lamp bead 32 in parallel therewith, third switch 43 and third lamp bead 33 in parallel therewith and the 4th switch 44
And in parallel the 4th lamp bead 34 therewith, controller 20 respectively with LED drive circuit 10, first switch 41, second switch 42, third
Switch 43 and the electrical connection of the 4th switch 44, LED drive circuit 10 and first switch 41, second switch 42, third switch 43 and the
The electrical connection of four switches 44.
Controller 20 inputs the first pulse signal to first switch 41, controls the closure of 41 circuit of first switch so that first
Lamp bead 31 is lighted, or controls the disconnection of 41 circuit of first switch so that the first lamp bead 31 is extinguished.
Controller 20 inputs the second pulse signal to second switch 42, controls the closure of 42 circuit of second switch so that second
Lamp bead 32 is lighted, or controls the disconnection of 42 circuit of second switch so that the second lamp bead 32 is extinguished.
Controller 20 inputs third pulse signal to third switch 43, controls the closure of 43 circuit of third switch so that third
Lamp bead 33 is lighted, or controls the disconnection of 43 circuit of third switch so that third lamp bead 33 is extinguished.
Controller 20 inputs the 4th pulse signal to the 4th switch 44, controls the closure of 44 circuit of the 4th switch so that the 4th
Lamp bead 34 is lighted, or controls the disconnection of 44 circuit of the 4th switch so that the 4th lamp bead 34 is extinguished.
Controller 20 inputs the 5th pulse signal to LED drive circuit 10, adjusts LED drive current；So that the first lamp bead
31, at least one of the second lamp bead 32, third lamp bead 33 and the 4th lamp bead 34 are lighted, wherein the frequency of the 5th pulse signal
Less than the frequency of the first pulse signal, the second pulse signal, third pulse signal and the 4th pulse signal, to be driven by LED
The brightness lighted in current regulation the first lamp bead 31, the second lamp bead 32, third lamp bead 33 and the 4th lamp bead 34.
It should be noted that LED drive circuit 10 is constant current output circuit in the present embodiment.
It should be noted that the first lamp bead 31 is the lamp bead to emit white light in the present embodiment；Second lamp bead 32 glows
Lamp bead；Third lamp bead 33 is the lamp bead of green light；4th lamp bead 34 is the lamp bead of blue light-emitting.
Dimming device 1 further includes sampling resistor 50, and sampling resistor 50 is connected with LED drive circuit 10.Sampling resistor 50 is used
In the electric current of acquisition LED drive circuit 10, the size of 10 electric current of LED drive circuit is detected.
Dimming device 1 further includes inductor 60, inductor 60 and LED drive circuit 10, first switch 41, second switch
42, third switch 43 and the electrical connection of the 4th switch 44.Inductor 60 is used in the state that no electric current passes through, when circuit is connected
Electric current is hindered to pass through；In the state of thering is electric current to pass through, maintain electric current constant when circuit disconnects.
The working principle of dimming device provided in this embodiment 1 introduced below:
By inputting the 5th pulse signal to LED drive circuit 10, LED drive current is adjusted；And make the first lamp bead 31,
At least one of second lamp bead 32, third lamp bead 33 and the 4th lamp bead 34 are lighted, to adjust the first lamp by LED drive current
The brightness lighted in pearl 31, the second lamp bead 32, third lamp bead 33 and the 4th lamp bead 34.
In conclusion a kind of dimming device 1 provided by the invention, controller 20 can be respectively to LED drive circuit 10,
One switch 41, second switch 42, third switch 43 and the 4th switch 44 input the 5th pulse signal, the first pulse signal, second
Pulse signal, third pulse signal and the 4th pulse signal, wherein the frequency of the 5th pulse signal less than the first pulse signal,
The frequency of second pulse signal, third pulse signal and the 4th pulse signal can increase the light modulation depth of LED lamp bead.
Embodiment two
Referring to Fig. 2, Fig. 2 is the flow chart of light-dimming method 100 provided by Embodiment 2 of the present invention.Light-dimming method 100 is main
It is used to adjust the brightness of LED lamp bead, is a kind of method for facilitating user's adjusting to carry out light mixing to different LED lamp beads.This implementation
The light-dimming method 100 that example provides increases the light modulation depth of LED lamp bead, while solving the problems, such as without visual stroboscopic.
The step of light-dimming method 100 includes:
Step S110 inputs the first pulse signal to first switch 41, controls the closure of 41 circuit of first switch so that the
One lamp bead 31 is lighted, or controls the disconnection of 41 circuit of first switch so that the first lamp bead 31 is extinguished.
Wherein, the first lamp bead 31 is connect with LED drive circuit 10, and first switch 41 is in parallel with the first lamp bead 31.First lamp
Pearl 31 is the lamp bead to emit white light.
Step S120 inputs the second pulse signal to second switch 42, controls the closure of 42 circuit of second switch so that the
Two lamp beads 32 are lighted, or control the disconnection of 42 circuit of second switch so that the second lamp bead 32 is extinguished.
Wherein, the second lamp bead 32 is connect with LED drive circuit 10, and second switch 42 is in parallel with the second lamp bead 32.Second lamp
Pearl 32 is the lamp bead to glow.
Step S130 inputs third pulse signal to third switch 43, controls the closure of 43 circuit of third switch so that the
Three lamp beads 33 are lighted, or control the disconnection of 43 circuit of third switch so that third lamp bead 33 is extinguished.
Wherein, third lamp bead 33 is connect with LED drive circuit 10, and third switch 43 is in parallel with third lamp bead 33.Third lamp
Pearl 33 is the lamp bead of green light.
Step S140 inputs the 4th pulse signal to the 4th switch 44, controls the closure of 44 circuit of the 4th switch so that the
Four lamp beads 34 are lighted, or control the disconnection of 44 circuit of the 4th switch so that the 4th lamp bead 34 is extinguished.
Wherein, the 4th lamp bead 34 is connect with LED drive circuit 10, and the 4th switch 44 is in parallel with the 4th lamp bead 34.4th lamp
Pearl 34 is the lamp bead of blue light-emitting.
It should be noted that in the present embodiment, step S110, between step S120, step S130 and step S140, no elder generation
Sequence afterwards, step S110, step S120, step S130 and step S140 only need all to execute.
Step S150 inputs the 5th pulse signal to LED drive circuit 10, adjusts LED drive current；So that the first lamp bead
31, at least one of the second lamp bead 32, third lamp bead 33 and the 4th lamp bead 34 are lighted, to adjust the by LED drive current
The brightness lighted in one lamp bead 31, the second lamp bead 32, third lamp bead 33 and the 4th lamp bead 34.
Wherein, the frequency of the 5th pulse signal is less than the first pulse signal, the second pulse signal, third pulse signal and
The frequency of four pulse signals.First pulse signal, the second pulse signal, the frequency of third pulse signal and the 4th pulse signal are big
It is less than preset value in the frequency of preset value, the 5th pulse signal.
It should be noted that in the present embodiment, the first pulse signal, the second pulse signal, third pulse signal, the 4th arteries and veins
It rushes signal and the 5th pulse signal is pulse width modulating signal.
It should be noted that LED drive circuit 10 is constant current output circuit in the present embodiment.
The following are the working principles of light-dimming method 100 provided in this embodiment:
By inputting the 5th pulse signal to LED drive circuit 10, LED drive current is adjusted；And make the first lamp bead 31,
At least one of second lamp bead 32, third lamp bead 33 and the 4th lamp bead 34 are lighted, to adjust the first lamp by LED drive current
The brightness lighted in pearl 31, the second lamp bead 32, third lamp bead 33 and the 4th lamp bead 34.
In conclusion a kind of light-dimming method 100 provided by the invention, the frequency of the 5th pulse signal are believed less than the first pulse
Number, the frequency of the second pulse signal, third pulse signal and the 4th pulse signal, the light modulation depth of LED lamp bead can be increased.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of light-dimming method, which is characterized in that the light-dimming method includes:
First pulse signal is inputted to first switch, controls the closure of the first switch circuit so that the first lamp bead is lighted, or
Person controls the disconnection of the first switch circuit so that first lamp bead is extinguished, wherein first lamp bead and LED driving electricity
Road connection, the first switch are in parallel with first lamp bead；
Second pulse signal is inputted to second switch, controls the closure of the second switch circuit so that the second lamp bead is lighted, or
Person controls the disconnection of the second switch circuit so that second lamp bead is extinguished, wherein second lamp bead and the LED drive
Dynamic circuit connection, the second switch are in parallel with second lamp bead；
Input third pulse signal is switched to third, controls the closure of the third switching circuit so that third lamp bead is lighted, or
Person controls the disconnection of the third switching circuit so that the third lamp bead is extinguished, wherein the third lamp bead and the LED drive
Dynamic circuit connection, the third switch are in parallel with the third lamp bead；
To the 4th switch the 4th pulse signal of input, the closure of the 4th switching circuit is controlled so that the 4th lamp bead is lighted, or
Person controls the disconnection of the 4th switching circuit so that the 4th lamp bead is extinguished, wherein the 4th lamp bead and the LED drive
Dynamic circuit connection, the 4th switch are in parallel with the 4th lamp bead；
5th pulse signal is inputted to the LED drive circuit, adjusts LED drive current；So that first lamp bead, the second lamp
At least one of pearl, third lamp bead and the 4th lamp bead are lighted, wherein the frequency of the 5th pulse signal is less than described first
The frequency of pulse signal, the second pulse signal, third pulse signal and the 4th pulse signal, to pass through the LED drive current
Adjust the brightness lighted in first lamp bead, the second lamp bead, third lamp bead and the 4th lamp bead.
2. light-dimming method according to claim 1, which is characterized in that first pulse signal, the second pulse signal,
The frequency of three pulse signals and the 4th pulse signal is greater than preset value, and the frequency of the 5th pulse signal is less than preset value.
3. light-dimming method according to claim 1, which is characterized in that input the first pulse signal, control to first switch
The closure of the first switch circuit is so that the first lamp bead is lighted, or controls the disconnection of the first switch circuit so that described
In the step of first lamp bead is extinguished:
First lamp bead is the lamp bead to emit white light.
4. light-dimming method according to claim 1, which is characterized in that input the second pulse signal, control to second switch
The closure of the second switch circuit is so that the second lamp bead is lighted, or controls the disconnection of the second switch circuit so that described
In the step of second lamp bead is extinguished:
Second lamp bead is the lamp bead to glow.
5. light-dimming method according to claim 1, which is characterized in that switch input third pulse signal, control to third
The closure of the third switching circuit is so that third lamp bead is lighted, or controls the disconnection of the third switching circuit so that described
In the step of third lamp bead is extinguished:
The third lamp bead is the lamp bead of green light.
6. light-dimming method according to claim 1, which is characterized in that the 4th switch the 4th pulse signal of input, control
The closure of 4th switching circuit is so that the 4th lamp bead is lighted, or controls the disconnection of the 4th switching circuit so that described
In the step of 4th lamp bead is extinguished:
4th lamp bead is the lamp bead of blue light-emitting.
7. light-dimming method according to claim 1, which is characterized in that input the 5th pulse letter to the LED drive circuit
Number, adjust LED drive current the step of in:
The LED drive circuit is constant current output circuit.
8. a kind of dimming device, which is characterized in that including controller, LED drive circuit, first switch and therewith in parallel first
Lamp bead, second switch and the second lamp bead in parallel therewith, third switch and third lamp bead in parallel therewith and the 4th switch and with
Parallel connection the 4th lamp bead, the controller respectively with the LED drive circuit, first switch, second switch, third switch and
4th switch electrical connection, the LED drive circuit are electrically connected with the first switch, second switch, third switch and the 4th switch
It connects；
The controller inputs the first pulse signal to the first switch, controls the closure of the first switch circuit so that the
One lamp bead is lighted, or controls the disconnection of the first switch circuit so that first lamp bead is extinguished；
The controller inputs the second pulse signal to the second switch, controls the closure of the second switch circuit so that the
Two lamp beads are lighted, or control the disconnection of the second switch circuit so that second lamp bead is extinguished；
The controller switchs input third pulse signal to the third, controls the closure of the third switching circuit so that the
Three lamp beads are lighted, or control the disconnection of the third switching circuit so that the third lamp bead is extinguished；
The controller controls the closure of the 4th switching circuit so that the to the 4th switch the 4th pulse signal of input
Four lamp beads are lighted, or control the disconnection of the 4th switching circuit so that the 4th lamp bead is extinguished；
The controller inputs the 5th pulse signal to the LED drive circuit, adjusts LED drive current；So that described first
At least one of lamp bead, the second lamp bead, third lamp bead and the 4th lamp bead are lighted, wherein the frequency of the 5th pulse signal
Less than the frequency of first pulse signal, the second pulse signal, third pulse signal and the 4th pulse signal, by described
LED drive current adjusts the brightness lighted in first lamp bead, the second lamp bead, third lamp bead and the 4th lamp bead.
9. dimming device according to claim 8, which is characterized in that the LED drive circuit is constant current output circuit.
10. dimming device according to claim 8, which is characterized in that first lamp bead is the lamp bead to emit white light；It is described
Second lamp bead is the lamp bead to glow；The third lamp bead is the lamp bead of green light；4th lamp bead is the lamp bead of blue light-emitting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811191731.3A CN109121258A (en) | 2018-10-12 | 2018-10-12 | A kind of light-dimming method and dimming device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811191731.3A CN109121258A (en) | 2018-10-12 | 2018-10-12 | A kind of light-dimming method and dimming device |
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| CN201811191731.3A Pending CN109121258A (en) | 2018-10-12 | 2018-10-12 | A kind of light-dimming method and dimming device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114143927A (en) * | 2021-10-19 | 2022-03-04 | 深圳拓邦股份有限公司 | Energy-saving LED light depth adjusting circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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