CN206323618U - A kind of LED matrix based on PMW drive controls - Google Patents
A kind of LED matrix based on PMW drive controls Download PDFInfo
- Publication number
- CN206323618U CN206323618U CN201720031447.4U CN201720031447U CN206323618U CN 206323618 U CN206323618 U CN 206323618U CN 201720031447 U CN201720031447 U CN 201720031447U CN 206323618 U CN206323618 U CN 206323618U
- Authority
- CN
- China
- Prior art keywords
- resistance
- pmw
- led
- pin
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model is related to a kind of LED matrix based on PMW drive controls.Solving in general LED circuit LED, often bright power consumption is larger, and it is larger to there is current-limiting resistance volume, is unfavorable for the problem of product is minimized.LED matrix, including the LED circuit by least one controlled switch element series connection that can carry out high-frequency break-make, circuit is controlled by the PMW for adjusting pulse output control switch unit break-make, PMW control circuit outputs end is connected with switch element control end, work device the main control circuit being controlled, and main control circuit output end is connected with PMW control circuit input ends.Advantage of the present utility model：Pulse access metal-oxide-semiconductor will be modulated by pwm control circuit, the break-make of controlling switch unit, replaces normal bright state, so as to reduce the power consumption of current-limiting resistance using LED flicker state, the volume of current-limiting resistance is also reduced simultaneously, and a kind of scheme of practicable is provided for product miniaturization.
Description
Technical field：
The utility model is related to a kind of LED control technology fields, more particularly to a kind of LED dresses based on PMW drive controls
Put.
Background technology：
Traditional LED drive circuit we directly driven to control the light on and off of LED with metal-oxide-semiconductor circuit.Will in circuit
G grades of mos pipes connect high level when the function of realization is LED often bright；G grades of mos pipes connect low level when LED goes out；Mos pipes g when LED flashes
Level connects pulse, and LED flicker frequency is controlled by pulse.But it have been found that, the current limliting electricity joined when LED is often bright with LED strip
The power consumption of resistance is larger, it is impossible to meet design requirement.
LED driving voltage is 3.2V；Driving current is 800mA, and supply voltage is 4.2V, then we need series resistance
Resistance be：
(VCC-VLED)/ILED=(4.2V-3.2V)/0.8A=1.25Ω
PR=1.25*0.82=0.8W
0.8W pellet resistance volume is larger, and the small-sized of product is unfavorable for during actual PCB place and route
Change.
The content of the invention：
The utility model mainly solves in general LED circuit LED, and often bright power consumption is larger, exist current-limiting resistance volume compared with
Greatly, be unfavorable for product miniaturization, it is impossible to the problem of meeting design requirement there is provided a kind of small power consumption, meet the base of design requirement
In the LED matrix of PMW drive controls.
The utility model solves the technical scheme that its technical problem used：A kind of LED dresses based on PMW drive controls
Put, including
By the LED circuit of at least one controlled switch element series connection that can carry out high-frequency break-make,
Circuit, PMW control circuit outputs end and switch are controlled by adjusting the PMW of pulse output control switch unit break-make
Unit control end is connected,
Work device the main control circuit being controlled, and main control circuit output end controls circuit input end phase with PMW
Even.The utility model master control circuit controls PMW control circuit work, and powered for PMW controls circuit, LED circuit, PMW
It is the square-wave pulse that 50% frequency is 1KHZ by modulating pulsewidth and frequency to generate dutycycle to control circuit, and switch element is carried out
Break-make is controlled, and normal bright state is replaced using LED flicker state, so that the power consumption of current-limiting resistance is reduced, while also reducing limit
The volume of leakage resistance, a kind of scheme of practicable is provided for product miniaturization.Because the frequency of pulse is higher, human eye
None- identified so high flicker frequency is so be mistaken for Chang Liang state.
As a kind of preferred scheme of such scheme, the PMW controls circuit includes PMW control chips U2, resistance R9, electricity
R11, electric capacity C1, PMW control chip U2 1 pin connection power supply are hindered, 4 pin after series resistance R11 with 1 pin by being connected, PMW controls
Chip U2 5 pin are by connecting valve unit control end after series resistance R9, electric capacity C1 one end connection power supply, the other end respectively with
PMW control chips U2 8 pin, ground terminal are connected.
As a kind of preferred scheme of such scheme, PMW control circuits also include button S1, and button S1 one end is controlled with PMW
Coremaking piece U2 4 pin are connected, and the other end is connected with PMW control chips U2 8 pin.Button S1 be used to control whether into line flicker or
Chang Liang, by being manually flexibly controlled.
As a kind of preferred scheme of such scheme, the PMW control chips U2 uses M14057.
As a kind of preferred scheme of such scheme, the switch element is metal-oxide-semiconductor Q1, and LED circuit includes resistance R5, electricity
R12, LED D4 are hindered, metal-oxide-semiconductor Q1 source electrodes connection power supply, metal-oxide-semiconductor Q1 drain electrode connection resistance R12 one end, the resistance R12 other ends connect
LED D4 positive poles are connect, LED D4 negative poles ground connection, metal-oxide-semiconductor Q1 grids are connected with resistance R9, resistance R5 one end connection power supply, resistance
The R5 other ends connect metal-oxide-semiconductor Q1 grids.The break-make of metal-oxide-semiconductor Q1 open and close controlling LED circuit, so as to form flicker.Resistance R12 is used
In giving LED D4 current limlitings, LED D4 is protected.
As a kind of preferred scheme of such scheme, main control circuit includes control chip U1, resistance R1, resistance R2, electricity
R6, battery BT1, electric capacity C2, electric capacity C3, LED D1 are hindered, the termination 5V power supplys of resistance R1 mono-, the resistance R1 other ends connect electricity respectively
Hold C2 one end, control chip U1 4 pin, control chip U1 8 pin, electric capacity C2 other ends ground connection, the connection control of resistance R2 one end
Chip U1 4 pin, resistance R2 other ends connection LED D1 positive poles, LED D1 negative poles connection control chip U1 7 pin, battery
BT1 positive pole connects control chip U1 5 pin, PWM drive circuit input respectively, and battery BT1 negative pole is grounded, and electric capacity C3 is simultaneously
It is connected on battery BT1, resistance R6 one end connection control chip U1 2 pin, resistance R6 other ends ground connection, control chip U1 1 pin,
3 pin are grounded respectively.LED D1 is used for the working condition for showing main control circuit.Battery BT1 is powered for device circuit.Electricity
Hold C3 to be filtered.
As a kind of preferred scheme of such scheme, between main control circuit output end and pwm control circuit input
Low pressure display circuit is also associated with, low pressure display circuit includes low pressure detection chip U3, resistance R10, LED D3, low pressure detection
Chip U3 2 pin are connected with power supply, low pressure detection chip U3 1 pin connection pwm control circuit input, low pressure detection chip U3
3 pin ground connection, resistance R10 one end connection power supply, the resistance R10 other ends connection LED D3 positive poles, LED D3 negative pole connection
Pwm control circuit input.Circuit voltage it is low arrive certain value when, LED D3 is bright.
As a kind of preferred scheme of such scheme, the main control circuit uses GY7012 including control chip U1.
As a kind of preferred scheme of such scheme, the low pressure detection chip U3 uses TX7035.
Advantage of the present utility model：To modulate pulse access metal-oxide-semiconductor by pwm control circuit, controlling switch unit it is logical
It is disconnected, normal bright state is replaced using LED flicker state, so that the power consumption of current-limiting resistance is reduced, while also reducing current-limiting resistance
Volume, for product miniaturization provide a kind of scheme of practicable.
Brief description of the drawings
Fig. 1 is a kind of electrical block diagram of the present utility model.
1- main control circuits 2-PWM controls circuit 3- switch element 4- low pressure display circuits.
Embodiment：
Below by embodiment, and with reference to accompanying drawing, the technical solution of the utility model is further described.
Embodiment：
A kind of LED matrix based on PMW drive controls of the present embodiment, as shown in figure 1, including
By the LED circuit of at least one controlled switch element series connection that can carry out high-frequency break-make,
Circuit, PMW control circuit outputs end and switch are controlled by adjusting the PMW of pulse output control switch unit break-make
Unit control end is connected,
Work device the main control circuit being controlled, and main control circuit output end controls circuit input end phase with PMW
Even.
PMW control circuits include PMW control chips U2, resistance R9, resistance R11, electric capacity C1, button S1.PMW control chips
U2 uses M14057.PMW control chips U2 1 pin connection power supply, 4 pin after series resistance R11 with 1 pin by being connected, PMW controls
Chip U2 5 pin are by connecting valve unit control end after series resistance R9, electric capacity C1 one end connection power supply, the other end respectively with
PMW control chips U2 8 pin, ground terminal are connected.Button S1 one end is connected with PMW control chips U2 4 pin, and the other end is controlled with PMW
Coremaking piece U2 8 pin are connected.
Switch element is metal-oxide-semiconductor Q1, and LED circuit includes resistance R5, resistance R12, LED D4, metal-oxide-semiconductor Q1 source electrodes connection electricity
Source, metal-oxide-semiconductor Q1 drain electrode connection resistance R12 one end, resistance R12 other ends connection LED D4 positive poles, LED D4 negative poles ground connection,
Metal-oxide-semiconductor Q1 grids are connected as switch element control end, metal-oxide-semiconductor Q1 grids with resistance R9, resistance R5 one end connection power supply, resistance
The R5 other ends connect metal-oxide-semiconductor Q1 grids.
Main control circuit include control chip U1, resistance R1, resistance R2, resistance R6, battery BT1, electric capacity C2, electric capacity C3,
LED D1.Control chip U1 uses GY7012.Resistance R1 mono- terminates 5V power supplys, and the resistance R1 other ends connect electric capacity C2 mono- respectively
End, control chip U1 4 pin, control chip U1 8 pin, electric capacity C2 other ends ground connection, resistance R2 one end connection control chip U1
4 pin, resistance R2 other ends connection LED D1 positive poles, LED D1 negative poles connection control chip U1 7 pin, battery BT1 is just
Pole connects control chip U1 5 pin, PWM drive circuit input respectively, and battery BT1 negative pole ground connection, electric capacity C3 is attempted by electricity
On the BT1 of pond, resistance R6 one end connection control chip U1 2 pin, resistance R6 other ends ground connection, control chip U1 1 pin, 3 pin point
It is not grounded.
Low pressure display circuit is also associated between main control circuit output end and pwm control circuit input, low pressure shows
Show that circuit includes low pressure detection chip U3, resistance R10, LED D3.Low pressure detection chip U3 uses TX7035.Low pressure detects core
Piece U3 2 pin are connected with power supply, low pressure detection chip U3 1 pin connection pwm chip U2 3 pin, low pressure detection chip U3
3 pin ground connection, resistance R10 one end connection power supply, the resistance R10 other ends connection LED D3 positive poles, LED D3 negative pole connection
Pwm chip U2 2 pin.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Although more having used the arts such as main control circuit, pwm control circuit, switch element, low pressure display circuit herein
Language, but it is not precluded from the possibility using other terms.It is used for the purpose of more easily describing and explaining this using these terms
The essence of invention；Any additional limitation is construed as all to disagree with spirit of the present invention.
Claims (9)
1. a kind of LED matrix based on PMW drive controls, it is characterised in that：Including
By the LED circuit of at least one controlled switch element series connection that can carry out high-frequency break-make,
Circuit, PMW control circuit outputs end and switch element are controlled by the PMW for adjusting pulse output control switch unit break-make
Control end is connected,
Work device the main control circuit being controlled, and main control circuit output end is connected with PMW control circuit input ends.
2. a kind of LED matrix based on PMW drive controls according to claim 1, it is characterized in that the PMW controls circuit
1 pin connection power supply including PMW control chips U2, resistance R9, resistance R11, electric capacity C1, PMW control chip U2,4 pin pass through string
It is connected after connection resistance R11 with 1 pin, PMW control chips U2 5 pin pass through connecting valve unit control end after series resistance R9, electricity
Hold C1 one end connection power supply, the other end 8 pin respectively with PMW control chips U2, ground terminal are connected.
3. a kind of LED matrix based on PMW drive controls according to claim 2, it is characterized in that PMW control circuits are also wrapped
Button S1 is included, button S1 one end is connected with PMW control chips U2 4 pin, and the other end is connected with PMW control chips U2 8 pin.
4. a kind of LED matrix based on PMW drive controls according to Claims 2 or 3, it is characterized in that the PMW is controlled
Chip U2 uses M14057.
5. a kind of LED matrix based on PMW drive controls according to Claims 2 or 3, it is characterized in that the switch element
For metal-oxide-semiconductor Q1, LED circuit includes resistance R5, resistance R12, LED D4, and metal-oxide-semiconductor Q1 source electrodes connection power supply, metal-oxide-semiconductor Q1 drain electrodes connect
Connecting resistance R12 one end, resistance R12 other ends connection LED D4 positive poles, LED D4 negative poles ground connection, metal-oxide-semiconductor Q1 grids and resistance
R9 connections, resistance R5 one end connection power supply, resistance R5 other ends connection metal-oxide-semiconductor Q1 grids.
6. a kind of LED matrix based on PMW drive controls according to claim 1, it is characterized in that main control circuit includes
Control chip U1, resistance R1, resistance R2, resistance R6, battery BT1, electric capacity C2, electric capacity C3, LED D1, the terminations of resistance R1 mono- 5V
Power supply, the resistance R1 other ends connect electric capacity C2 one end, control chip U1 4 pin, control chip U1 8 pin respectively, and electric capacity C2 is another
One end is grounded, and resistance R2 one end connection control chip U1 4 pin, resistance R2 other ends connection LED D1 positive poles, LED D1 is born
Pole connection control chip U1 7 pin, battery BT1 positive pole connects control chip U1 5 pin, PWM drive circuit input respectively,
Battery BT1 negative pole ground connection, electric capacity C3 is attempted by battery BT1, resistance R6 one end connection control chip U1 2 pin, resistance R6
The other end is grounded, and control chip U1 1 pin, 3 pin are grounded respectively.
7. a kind of LED matrix based on PMW drive controls according to claim 1 or 2 or 3, it is characterized in that in main control
Low pressure display circuit is also associated between circuit output end and pwm control circuit input, low pressure display circuit is examined including low pressure
Chip U3 is surveyed, resistance R10, LED D3, low pressure detection chip U3 2 pin are connected with power supply, low pressure detection chip U3 1 pin connects
Connect pwm control circuit input, low pressure detection chip U3 3 pin ground connection, resistance R10 one end connection power supply, the resistance R10 other ends
Connect LED D3 positive poles, LED D3 negative pole connection pwm control circuit input.
8. a kind of LED matrix based on PMW drive controls according to claim 6, it is characterized in that the main control circuit
GY7012 is used including control chip U1.
9. a kind of LED matrix based on PMW drive controls according to claim 7, it is characterized in that the low pressure detects core
Piece U3 uses TX7035.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720031447.4U CN206323618U (en) | 2017-01-11 | 2017-01-11 | A kind of LED matrix based on PMW drive controls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720031447.4U CN206323618U (en) | 2017-01-11 | 2017-01-11 | A kind of LED matrix based on PMW drive controls |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206323618U true CN206323618U (en) | 2017-07-11 |
Family
ID=59261256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720031447.4U Expired - Fee Related CN206323618U (en) | 2017-01-11 | 2017-01-11 | A kind of LED matrix based on PMW drive controls |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206323618U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109688668A (en) * | 2019-03-06 | 2019-04-26 | 浙江雨林电子科技有限公司 | It is a kind of to make LED light gradually bright driving power |
-
2017
- 2017-01-11 CN CN201720031447.4U patent/CN206323618U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109688668A (en) * | 2019-03-06 | 2019-04-26 | 浙江雨林电子科技有限公司 | It is a kind of to make LED light gradually bright driving power |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103440848B (en) | Backlight drive circuit | |
| CN103198799B (en) | Backlight drive board and liquid crystal display | |
| CN103327696B (en) | A kind of LED backlight drive circuit and driving method, liquid crystal indicator | |
| CN105025632A (en) | Light-emitting diode (LED) lamp capable of color modulation by switches and control circuit thereof | |
| CN103871371A (en) | LED (light-emitting diode) backlight driving circuit, backlight module and liquid crystal display device | |
| CN206323618U (en) | A kind of LED matrix based on PMW drive controls | |
| CN208754025U (en) | A kind of switched charge circuit | |
| CN107508339B (en) | A kind of charging circuit and mobile terminal | |
| CN103531147B (en) | LED drive circuit and use the LED drive system of this driving circuit | |
| CN208834723U (en) | Multi-channel LED backlight drive circuit and LCD TV | |
| CN106354075A (en) | Control circuit of remote controller with backlight screen | |
| CN109922568A (en) | Universal-type solar can control system | |
| CN106910475B (en) | New type liquid crystal television back light driving circuit | |
| CN203378106U (en) | LED emergency illuminating device | |
| CN103354083B (en) | Backlight drive circuit and display device | |
| CN205753352U (en) | Servo-driver dual power supply low pressure sync detection circuit | |
| CN205069083U (en) | Prevent circuit that overshoots | |
| CN207150898U (en) | Prevent electric backflash circuit under LED light device | |
| CN207022253U (en) | A kind of LED drive power based on DC level automatic conversion pulsewidth modulation | |
| CN103247269A (en) | LED backlight and liquid crystal display device | |
| CN104768259B (en) | Adaptive LED booster driving circuit | |
| CN209517566U (en) | A kind of capacitor quick discharging circuit | |
| CN208891094U (en) | A kind of LED lamp driving power | |
| CN103841711B (en) | A kind of LED emergence lighting lamp and drive circuit thereof | |
| CN208754024U (en) | A kind of switched charge circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170711 Termination date: 20210111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |