CN206196096U - LED drive circuit , LED regulating circuit and LED module - Google Patents
LED drive circuit , LED regulating circuit and LED module Download PDFInfo
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- CN206196096U CN206196096U CN201621298708.0U CN201621298708U CN206196096U CN 206196096 U CN206196096 U CN 206196096U CN 201621298708 U CN201621298708 U CN 201621298708U CN 206196096 U CN206196096 U CN 206196096U
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Abstract
The utility model relates to a LED drive circuit, LED regulating circuit and LED module. This LED drive circuit includes: signal input part for input drive signal, first switch module, first end connect in signal input part, the second end is connected in LED, pull -up module, first termination ground, second end connect in the third end of first switch module, second switch module, first end connect in the second of pull -up module end, second end connect in signal input part, not third termination ground. According to the utility model discloses a which the technique puts, can obtain the drive current of arbitrary numerical value through the duty cycle D who adjusts drive signal, so can be as required with LED's intensity control to very low luminance, until closing. Make on the one hand the user can adjust LED's luminance in larger scope, on the other hand makes user observed LED's luminance weaken until the in -process of closing, and LED is enough low in the luminance of closing previous state, guarantees that the brightness flop that the user watched is more mild.
Description
Technical field
This disclosure relates to field of terminal technology, more particularly to a kind of method and device, electronic equipment.
Background technology
The brightness regulation for LED mainly includes two ways at present：
One kind be PWM (pulse width modulation) light modulation, the light modulation chip in which due to its own topological structure reason,
No more than 1KHz general to PWM frequency requirement, while requiring that the dutycycle of PWM is greater than 1% or so, such LED could just
It is normal to light and turn off, therefore light modulation electric current can not possibly be made thin low.
Another kind is simulation light modulation, and the light modulation chip in which uses sluggish amperometric detection mode, this topology
Structure purpose be in order to realize without stroboscopic dim and design, but shortcoming is also it is obvious that namely electric current therein is non-thread
Property, namely have a thresholding to low-key photoelectric signal, and only can just be worked higher than this threshold voltage chip, it is now right
The percentage of induced current is minimum more than 5%, therefore light modulation electric current is also impossible to be made thin low.
It can be seen that, the brightness adjustment approach of existing LED is all difficult to drive LED by very low driving current, and this just makes
User is obtained when the brightness of LED is adjusted, LED has a larger interval between brightness and closing higher, and user cannot
By the brightness regulation of LED to the interval.
Utility model content
The disclosure provides a kind of method and device, electronic equipment, to solve the deficiency in correlation technique.
According to the first aspect of the embodiment of the present disclosure, there is provided a kind of LED drive circuit, including：
Signal input part, for input drive signal；
First switch module, first end is connected to the signal input part, and the second end is connected to LED；
Pull-up module, first end ground connection, the second end is connected to the 3rd end of the first switch module, wherein, described
When the first end of first switch module receives the voltage more than the first predeterminated voltage, the second of the first switch module is turned on
End and the 3rd end；
Second switch module, first end is connected to the second end of the pull-up module, and it is defeated that the second end is connected to the signal
Enter end, the 3rd end is grounded, wherein, when the first end of the second switch module is received more than the second predeterminated voltage, conducting
Second end and the 3rd end of the second switch module.
Alternatively, above-mentioned LED drive circuit also includes：
Control module, is connected to the signal input part, the dutycycle for adjusting the drive signal.
Alternatively, above-mentioned LED drive circuit also includes：
Current limliting module, first end is connected to the signal input part, the second end ground connection.
Alternatively, the current limliting module is resistance.
Alternatively, above-mentioned LED drive circuit also includes：
Division module, first end is connected to the signal input part, and the second end is connected to the of the first switch module
One end, and the second switch module the second end.
Alternatively, the division module is resistance.
Alternatively, the first switch module, second switch module are transistor or triode.
Alternatively, the pull-up module includes one or more resistance.
According to the second aspect of the embodiment of the present disclosure, there is provided a kind of LED adjusts circuit, including above-mentioned drive circuit, also wraps
Include：
Simulation light modulation chip, is connected to the LED；
Adjustment module, is connected to simulation light modulation chip and the signal input part, according to the instruction control for receiving
The simulation light modulation chip operation, and stop to the signal input part input signal, or control the simulation light modulation chip to stop
Only work, and to the signal input part input signal.
According to the third aspect of the embodiment of the present disclosure, there is provided a kind of LED modules, including above-mentioned LED regulation circuits, also wrap
Include：
Power panel, for receiving power supply signal；
Lamp plate, is connected to the power panel, is provided with LED regulations circuit and the LED；
Mounting box, for setting the power panel and the lamp plate；
Panel, for protecting the lamp plate；
Outer cover, for setting the panel, and is engaged the closing mounting box with the panel；
Pallet, for being fixed on predeterminated position；
Connector, for connecting the pallet and the mounting box.
The technical scheme provided by this disclosed embodiment can include the following benefits：
From above-described embodiment, the driving electricity of any number can be obtained by adjusting the dutycycle D of drive signal
Stream, and then can as needed by the brightness adjustment of LED to very low brightness, until closing.On the one hand allow users to
The brightness of LED is adjusted in larger scope, on the other hand causes the brightness deterioration of LED that user observes until the process closed
In, the brightness of LED states before being turned off is sufficiently low, it is ensured that the brightness change that user watches is more gentle.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
The disclosure can be limited.
Brief description of the drawings
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows the implementation for meeting the disclosure
Example, and it is used to explain the principle of the disclosure together with specification.
Fig. 1 is a kind of schematic construction of the LED drive circuit according to an exemplary embodiment.
Fig. 2 is the schematic construction of another LED drive circuit according to an exemplary embodiment.
Fig. 3 is the schematic construction of another LED drive circuit according to an exemplary embodiment.
Fig. 4 is the schematic construction of another LED drive circuit according to an exemplary embodiment.
Fig. 5 is the schematic construction of another LED drive circuit according to an exemplary embodiment.
Fig. 6 is the schematic construction of another LED drive circuit according to an exemplary embodiment.
Fig. 7 is a kind of schematic construction of the LED modules according to an exemplary embodiment.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in implementation method do not represent all implementation methods consistent with the disclosure.Conversely, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects described in detail in claims, the disclosure.
Fig. 1 is a kind of schematic construction of the LED drive circuit according to an exemplary embodiment.As shown in figure 1, should
LED drive circuit includes：
Signal input part 11, for input drive signal；
First switch module 12, first end is connected to the signal input part 11, and the second end is connected to LED15；
Pull-up module 13, first end ground connection, the second end is connected to the 3rd end of the first switch module 12, wherein,
When the first end of the first switch module 12 receives the voltage more than the first predeterminated voltage, the first switch module is turned on
12 the second end and the 3rd end；
Second switch module 14, first end is connected to the second end of the pull-up module 13, and the second end is connected to the letter
Number input 11, the 3rd end ground connection, wherein, received more than the second predeterminated voltage in the first end of the second switch module 14
When, turn on second end and the 3rd end of the second switch module 14.
In one embodiment, when the voltage of the drive signal of signal input part input is more than the first predeterminated voltage, the
One switch module can turn on itself the second end and the 3rd end, so that there have electric current to pass through on LED to be (not connected from LED
In one end of first switch module).
Electric current so by first switch module the second end flow into, the 3rd end flow out, and further such that pull-up module lead
It is logical.
Due to pulling up the conducting of module, itself there is pressure drop, therefore B points can be elevated above the current potential on ground, and
When the current potential is more than the second predeterminated voltage, can cause that second switch module is turned on.
Behind the second end and the 3rd end that second switch module turns on its own so that the current potential of A points is 0, namely first
The current potential of the first end of switch module is 0, so that first switch module is turned off.
The closing of first switch module causes that LED is not turned on, and also just passes through first switch module and upper drawing-die without electric current
Block, so that the current potential of B points is also 0, and then causes the shut-off of second switch module.
The shut-off of second switch causes current potential of the current potential of A points again with drive signal identical, so as to cause first again
Switch module is turned on, so that above-mentioned steps are circulated, until the current potential of drive signal is no larger than first voltage, namely a cycle
In when do not export significant level.
Accordingly, it can be deduced that by drawing-die on the dutycycle D × the second predeterminated voltage V/ of the electric current I=drive signals of LED
The resistance R of block.Wherein V and R are usually fixed, and D can be then tune, therefore can obtain Arbitrary Digit by adjusting D
The driving current of value, and then can as needed by the brightness adjustment of LED to very low brightness, until closing.On the one hand cause
User can in a wider context adjust the brightness of LED, on the other hand cause the brightness deterioration of the LED that user observes until closing
During closing, the brightness of LED states before being turned off is sufficiently low, it is ensured that the brightness change that user watches is more gentle.
Fig. 2 is the schematic construction of another LED drive circuit according to an exemplary embodiment.As shown in Fig. 2
On the basis of embodiment illustrated in fig. 1, LED drive circuit also includes：
Control module 16, is connected to the signal input part 11, the dutycycle for adjusting the drive signal.
The resistance R of module is pulled up due to the dutycycle D × the second predeterminated voltage V/ of the electric current I=drive signals of LED.Wherein
V and R are usually fixed, therefore the electric current of any number can be obtained by adjusting D, and then can as needed by LED
Brightness adjustment to very low brightness, until closing.
It is of course also possible to V and R are set to it is adjustable, so as to adjusted by more multimode LED driving electricity
Stream, and then adjust the brightness of LED.
Fig. 3 is the schematic construction of another LED drive circuit according to an exemplary embodiment.As shown in figure 3,
On the basis of embodiment illustrated in fig. 1, LED drive circuit also includes：
Current limliting module 17, first end is connected to the signal input part 11, the second end ground connection.
In one embodiment, due in the conducting of second switch module in a flash, the voltage of A points still with drive signal phase
Together, thus can cause in second switch module exist an immediate current, and the electric current may it is larger, easily to second switch
Module causes damage.By the current limliting module that second switch wired in parallel is arranged between A points and ground so that A points have electricity
During pressure, electric current can be also produced in current limliting module, the electric current of second switch module is flowed through so as to reduce, and then to second switch
Module serves protective effect.
In one embodiment, the current limliting module is resistance.Can be specifically one or more resistance, for example, be at it
During the resistance of multiple parallel connections, it is ensured that in the case that a resistance is damaged wherein, remain to play one to the second protection module
Fixed protective effect.
Fig. 4 is the schematic construction of another LED drive circuit according to an exemplary embodiment.As shown in figure 4,
On the basis of embodiment illustrated in fig. 1, also include：
Division module 18, first end is connected to the signal input part 11, and the second end is connected to the first switch module
12 first end, and the second switch module 14 the second end.
In one embodiment, due to drive signal may the not more stable signal such as square wave, its peak value may be compared with
Height, higher than the voltage that first switch module and/or second switch module can bear, by setting division module, due to electric current
When by division module, this voltage that division module can also divide, therefore can reduce be applied to first switch module and
Voltage in second switch module, and then protective effect is served to first switch module and second switch module.
In one embodiment, the division module is resistance.Can be specifically one or more resistance, for example, be at it
During the resistance of multiple parallel connections, it is ensured that in the case that a resistance is damaged wherein, remain to first switch module and second
Protection module plays certain protective effect.
Alternatively, the first switch module, second switch module are transistor or triode.
Fig. 5 is the schematic construction of another LED drive circuit according to an exemplary embodiment.As shown in figure 5,
On the basis of embodiment illustrated in fig. 1, first switch module can be transistor, for example, can be metal oxide semiconductcor field effect
Transistor (i.e. metal-oxide-semiconductor) is answered, second switch module can be triode, wherein, transistor can respond frequency very high and very
Small dutycycle, so as to allow to adjust in very large range the dutycycle of drive signal.
Fig. 6 is the schematic construction of another LED drive circuit according to an exemplary embodiment.As shown in fig. 6, can
So that the embodiment shown in Fig. 3, Fig. 4 and Fig. 5 to be incorporated into the embodiment shown in Fig. 1.
Wherein, the first end of first switch module can be the grid of transistor, and the second end can be the source electrode of transistor,
3rd end can be the drain electrode of transistor.The first end of second switch module can be the base stage of triode, and the second end can be
The colelctor electrode of triode, the 3rd end can be the emitter stage of triode.
Alternatively, the pull-up module includes one or more resistance.
The disclosure also proposed a kind of LED regulations circuit, including above-mentioned drive circuit, also include：
Simulation light modulation chip, is connected to the LED；
Adjustment module, is connected to simulation light modulation chip and the signal input part, according to the instruction control for receiving
The simulation light modulation chip operation, and stop to the signal input part input signal, or control the simulation light modulation chip to stop
Only work, and to the signal input part input signal.
In one embodiment, can switch mode as needed so that LED is driven by simulation light modulation chip, or
The driving of the above-mentioned drive circuit of person.And because the driven object of simulation light modulation chip and drive circuit is same LED, so that can
To reduce the quantity of the LED for setting, space is saved.
Fig. 7 is a kind of schematic construction of the LED modules according to an exemplary embodiment, including above-mentioned LED regulation electricity
Road, also includes：
Power panel 71, for receiving power supply signal；
Lamp plate 72, is connected to the power panel, is provided with LED regulations circuit and the LED；
Mounting box 73, for setting the power panel and the lamp plate；
Panel 74, for protecting the lamp plate；
Outer cover 75, for setting the panel, and is engaged the closing mounting box with the panel；
Pallet 76, for being fixed on predeterminated position；
Connector 77, for connecting the pallet and the mounting box.
In one embodiment, mask can be with indent and with certain radian, to play certain expansion to the light that lamp plate sends
Dissipate effect.Outer cover can be loop configuration, with can also tightly circle Guan County mounted box after mounting box is closed.By connector, can be with
Whole module is fixed on the position of the needs such as roof.
For device embodiment, because it corresponds essentially to embodiment of the method, so related part is referring to method reality
Apply the part explanation of example.Device embodiment described above is only schematical, wherein described as separating component
The module of explanation can be or may not be physically separate, and the part shown as module can be or can also
It is not physical module, you can with positioned at a place, or can also be distributed on multiple mixed-media network modules mixed-medias.Can be according to reality
Selection some or all of module therein is needed to realize the purpose of disclosure scheme.Those of ordinary skill in the art are not paying
In the case of going out creative work, you can to understand and implement.
After disclosure disclosed herein, other embodiments of the disclosure are will readily occur to.The application is intended to the disclosure
Any modification, purposes or adaptations, the generality that these modifications, purposes or adaptations follow the disclosure is former
Manage and including the undocumented common knowledge or conventional techniques in the art of the disclosure.Description and embodiments only by
It is considered as exemplary, the true scope of the disclosure and spirit are pointed out by following claim.
It should be appreciated that the disclosure is not limited to the precision architecture for being described above and being shown in the drawings, and
And can without departing from the scope carry out various modifications and changes.The scope of the present disclosure is only limited by appended claim.
Claims (10)
1. a kind of LED drive circuit, it is characterised in that including：
Signal input part, for input drive signal；
First switch module, first end is connected to the signal input part, and the second end is connected to LED；
Pull-up module, first end ground connection, the second end is connected to the 3rd end of the first switch module, wherein, described first
When the first end of switch module receives the voltage more than the first predeterminated voltage, turn on the first switch module the second end and
3rd end；
Second switch module, first end is connected to the second end of the pull-up module, and the second end is connected to the signal input part,
3rd end is grounded, wherein, when the first end of the second switch module is received more than the second predeterminated voltage, turn on described the
Second end and the 3rd end of two switch modules.
2. LED drive circuit according to claim 1, it is characterised in that also include：
Control module, is connected to the signal input part, the dutycycle for adjusting the drive signal.
3. LED drive circuit according to claim 1, it is characterised in that also include：
Current limliting module, first end is connected to the signal input part, the second end ground connection.
4. LED drive circuit according to claim 3, it is characterised in that the current limliting module is resistance.
5. LED drive circuit according to claim 1, it is characterised in that also include：
Division module, first end is connected to the signal input part, and the second end is connected to the first end of the first switch module,
And the second end of the second switch module.
6. LED drive circuit according to claim 5, it is characterised in that the division module is resistance.
7. LED drive circuit according to any one of claim 1 to 6, it is characterised in that the first switch module,
Second switch module is transistor or triode.
8. LED drive circuit according to any one of claim 1 to 6, it is characterised in that the pull-up module includes
Individual or multiple resistance.
9. a kind of LED adjusts circuit, it is characterised in that including the drive circuit any one of claim 1 to 6, also wrap
Include：
Simulation light modulation chip, is connected to the LED；
Adjustment module, is connected to simulation light modulation chip and the signal input part, according to the instruction control for receiving
Simulation light modulation chip operation, and stop to the signal input part input signal, or control the simulation light modulation chip to stop work
Make, and to the signal input part input signal.
10. a kind of LED modules, it is characterised in that adjust circuit including the LED described in claim 9, also include：
Power panel, for receiving power supply signal；
Lamp plate, is connected to the power panel, is provided with LED regulations circuit and the LED；
Mounting box, for setting the power panel and the lamp plate；
Panel, for protecting the lamp plate；
Outer cover, for setting the panel, and is engaged the closing mounting box with the panel；
Pallet, for being fixed on predeterminated position；
Connector, for connecting the pallet and the mounting box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621298708.0U CN206196096U (en) | 2016-11-29 | 2016-11-29 | LED drive circuit , LED regulating circuit and LED module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621298708.0U CN206196096U (en) | 2016-11-29 | 2016-11-29 | LED drive circuit , LED regulating circuit and LED module |
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| Publication Number | Publication Date |
|---|---|
| CN206196096U true CN206196096U (en) | 2017-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621298708.0U Active CN206196096U (en) | 2016-11-29 | 2016-11-29 | LED drive circuit , LED regulating circuit and LED module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106658837A (en) * | 2016-11-29 | 2017-05-10 | 北京小米移动软件有限公司 | LED driving circuit, LED regulation circuit and LED module |
-
2016
- 2016-11-29 CN CN201621298708.0U patent/CN206196096U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106658837A (en) * | 2016-11-29 | 2017-05-10 | 北京小米移动软件有限公司 | LED driving circuit, LED regulation circuit and LED module |
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| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100085, Haidian District, 68, Qinghe street, Huarun colorful city shopping center, two, 9, 01, room Co-patentee after: Qingdao Yilai Intelligent Technology Co.,Ltd. Patentee after: BEIJING XIAOMI MOBILE SOFTWARE Co.,Ltd. Address before: 100085, Haidian District, 68, Qinghe street, Huarun colorful city shopping center, two, 9, 01, room Co-patentee before: Qingdao Yeelink Information Technology Co.,Ltd. Patentee before: BEIJING XIAOMI MOBILE SOFTWARE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |