CN109637439A - A kind of circuit for realizing LED driving by shift register - Google Patents
A kind of circuit for realizing LED driving by shift register Download PDFInfo
- Publication number
- CN109637439A CN109637439A CN201910135519.3A CN201910135519A CN109637439A CN 109637439 A CN109637439 A CN 109637439A CN 201910135519 A CN201910135519 A CN 201910135519A CN 109637439 A CN109637439 A CN 109637439A
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- Prior art keywords
- pin
- mcu controller
- capacitor
- resistance
- mcu
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Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/28—Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a kind of to realize the circuit that LED drives by shift register, including the first MCU controller, 2nd MCU controller, first QE pin of the first MCU controller, first GND pin of the first MCU controller, 2nd QE pin of the 2nd MCU controller, 2nd GND pin of the 2nd MCU controller is cascaded and is connected to power cathode, first VCC pin of the first MCU controller, 2nd VCC pin of the 2nd MCU controller connects positive pole, resistance R1 is connected in series in the capacitor C2, resistance R5 is connected in series in the capacitor C6, the light emitting diode is connected in series with resistance R6, the light emitting diode is connected in parallel to the 2nd Q6 pin of the 2nd MCU controller, the 2nd MCU control The 2nd Q5 pin, the 2nd Q6 pin of device connect double figures code display tube.Using the I/O pin of less MCU, the display driving of LED is realized, the port resource for occupying MCU is few, reduces product cost.
Description
Technical field
The present invention relates to technical field of electronic products, specially a kind of electricity that LED driving is realized by shift register
Road.
Background technique
For electronic product in design, many products need to design display interface, the residence generally shown with LED charactrons
It is more.In digital pipe display circuit, need to occupy a large amount of I/O port of MCU, and the I/O port of MCU is limited, if necessary to driving
Charactron is more to occupy a large amount of I/O port resource, and in order to meet the function that other need I/O port to realize it is necessary to selecting height
The MCU at end, will increase product cost.If being realized using LED drive chip, the I/O port quantity of occupancy will not be reduced
Too much, and the price of general LED drive chip is also relatively high, is unfavorable for reducing cost.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of realizes the circuit that LED drives by shift register,
Cannot fast cable be dismantled very much by solving cable connector, the unstable problem of device internal structure.
In order to achieve the above object, the present invention is achieved by the following technical programs: one kind is by shift register come real
The circuit of existing LED driving, including the first MCU controller, the 2nd MCU controller, the first QE pipe of the first MCU controller
Foot, the first GND pin of the first MCU controller, the 2nd QE pin of the 2nd MCU controller, the 2nd MCU controller second
GND pin is cascaded and is connected to power cathode, the first VCC pin of the first MCU controller, the 2nd MCU control
2nd VCC pin of device connects positive pole, be connected in parallel between the anode and cathode of power supply capacitor C2, capacitor C3, capacitor C4,
Resistance R1 is connected in series in capacitor C5, capacitor C6, the capacitor C2, and resistance R2, the capacitor C4 string is connected in series in the capacitor C3
Resistance R4 is connected in series in connection connection resistance R3, the capacitor C5, and resistance R5, capacitor C2 and resistance R1 is connected in series in the capacitor C6
Between node connect the first Ds pin of the first MCU controller, node between capacitor C3 and resistance R2 connects the first MCU control
2nd SHcp pin of the first SHcp pin of device processed, the 2nd MCU controller, node connection between capacitor C4 and resistance R3 the
2nd STcp pin of the first STcp pin of one MCU controller, the 2nd MCU controller, the section between capacitor C5 and resistance R4
Point connects the 2nd Ds pin of the Q7 ' pin of the first MCU controller, the 2nd MCU controller, the section between capacitor C6 and resistance R5
Point connects the 2nd MR pin of the first MR pin of the first MCU controller, the 2nd MCU controller, the first MCU controller
First Q1 pin, the first Q2 pin, the first Q3 pin, the first Q4 pin, the first Q5 pin, the first Q6 pin are respectively connected with luminous
Diode, the light emitting diode are connected in series with resistance R6, and the light emitting diode is connected in parallel to the 2nd MCU control
2nd Q6 pin of device, the 2nd Q0 pin, the 2nd Q1 pin, the 2nd Q2 pin, the 2nd Q3 pipe of the 2nd MCU controller
Foot, the 2nd Q4 pin connect group of four figures display tube, the 2nd Q5 pin of the 2nd MCU controller, the connection of the 2nd Q6 pin
Double figures code display tube.Capacitor C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6 play the role of in the present invention as starting storage
Electric energy is deposited, guarantees that capacitor C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6 can store a certain amount of electricity when just operation circuit
Amount, stabilization are started, and guarantee the synchronous averaging of the first MCU controller, the 2nd MCU controller.
Preferably, the first MCU controller, the 2nd MCU controller model it is identical be 74HC595 chip.
Preferably, capacitor C1 is connected in series between the 2nd VCC pin and power cathode of the 2nd MCU controller.Electricity
Hold C1 in the moment on-off of the 2nd MCU controller circuitry, capacitor C1 discharges, plays the role of burning voltage, avoid influencing
Other pins.
Preferably, the resistance R1, resistance R2, resistance R3, resistance R4 are 5.1K.
Beneficial effect
The present invention provides a kind of to realize the circuit that LED drives by shift register.Have following the utility model has the advantages that logical
The first MCU controller, the 2nd MCU controller are crossed to realize the circuit of LED driving, data to be shown will be needed to send by software
To shift register, data are shown in the method that high speed poll is shown.Using the I/O pin of less MCU, realize LED's
Display driving, the port resource for occupying MCU is few, reduces product cost.
Detailed description of the invention
Fig. 1 is circuit structure diagram of the present invention.
In figure: the first MCU controller 1, the 2nd MCU controller 2, the first QE pin, the 2nd QE pin, the 2nd GND, first
VCC pin, the 2nd VCC pin, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6, resistance R1, resistance R2,
Resistance R3, resistance R4, resistance R5, resistance R6, the first Ds pin, the 2nd Ds pin, the first SHcp pin, the 2nd SHcp pin,
First STcp pin, the 2nd STcp pin, Q7 ' pin, the first MR pin, the 2nd MR pin, the first Q1 pin, the first Q2 pipe
Foot, the first Q3 pin, the first Q4 pin, the first Q5 pin, the first Q6 pin, the 2nd Q0 pin, the 2nd Q1 pin, the 2nd Q2 pipe
Foot, the 2nd Q3 pin, the 2nd Q4 pin, the 2nd Q5 pin, the 2nd Q6 pin.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of electricity for realizing LED driving by shift register
Road, including the first MCU controller 1, the 2nd MCU controller 2, the first QE pin of the first MCU controller 1, the first MCU control
The 2nd GND pin series connection of the first GND pin, the 2nd QE pin of the 2nd MCU controller 2, the 2nd MCU controller 2 of device 1 processed
Together and it is connected to power cathode, the second of the first VCC pin of the first MCU controller 1, the 2nd MCU controller 2
VCC pin connect positive pole, be connected in parallel between the anode and cathode of power supply capacitor C2, capacitor C3, capacitor C4, capacitor C5,
Resistance R1 is connected in series in capacitor C6, the capacitor C2, and resistance R2 is connected in series in the capacitor C3, and electricity is connected in series in the capacitor C4
R3 is hindered, resistance R4 is connected in series in the capacitor C5, and resistance R5 is connected in series in the capacitor C6, and the resistance value of resistance R5 is 100R, electricity
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R5 play the role of adjusting in each branch voltage so that power distribution arrives
The voltage of each pin is different, and resistance R1, resistance R2, resistance R3, resistance R4 are 5.1K, the node between capacitor C2 and resistance R1
The first Ds pin of the first MCU controller 1 is connected, node between capacitor C3 and resistance R2 connects the of the first MCU controller 1
2nd SHcp pin of one SHcp pin, the 2nd MCU controller 2, the node between capacitor C4 and resistance R3 connect the first MCU control
2nd STcp pin of the first STcp pin of device 1 processed, the 2nd MCU controller 2, the node connection between capacitor C5 and resistance R4
2nd Ds pin of the Q7 ' pin of the first MCU controller 1, the 2nd MCU controller 2, the node between capacitor C6 and resistance R5 connect
The first MR pin of the first MCU controller 1, the 2nd MR pin of the 2nd MCU controller 2 are connect, the first MCU controller 1
First Q1 pin, the first Q2 pin, the first Q3 pin, the first Q4 pin, the first Q5 pin, the first Q6 pin are respectively connected with luminous
Diode, the light emitting diode are connected in series with resistance R6, and the light emitting diode is connected in parallel to the 2nd MCU control
2nd Q6 pin of device 2, the 2nd Q0 pin, the 2nd Q1 pin, the 2nd Q2 pin, the 2nd Q3 pipe of the 2nd MCU controller 2
Foot, the 2nd Q4 pin connect group of four figures display tube, the 2nd Q5 pin of the 2nd MCU controller 2, the connection of the 2nd Q6 pin
Double figures code display tube.Capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6 play storage in entire circuit
Electric energy can be collected and be discharged to the effect of electric energy in the moment of power on/off, and the effect of power-off energy storage is played to the 2nd MCU controller 2
Fruit guarantees that the stabilization of each pin voltage is excessive.
Further, the first MCU controller 1, the 2nd MCU controller 2 model it is identical be 74HC595 chip.
74HC595 chip is that have 8 bit shift registers and a memory, ternary output function.
Further, capacitor C1 is connected in series between the 2nd VCC pin and power cathode of the 2nd MCU controller 2.
In use, realizing the circuit of LED driving by the first MCU controller 1, the 2nd MCU controller 2, pass through software
Need to data to be shown be sent to shift register, data are shown in the method that high speed poll is shown.Using less
The I/O pin of MCU realizes the display driving of LED, and the port resource for occupying MCU is few, reduces product cost.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (4)
1. a kind of circuit for realizing LED driving by shift register, including the first MCU controller (1), the 2nd MCU control
Device (2), it is characterised in that: the first QE pin of the first MCU controller (1), the first GND of the first MCU controller (1) are managed
Foot, the 2nd QE pin of the 2nd MCU controller (2), the 2nd MCU controller (2) the 2nd GND pin be cascaded and connect
To power cathode, the first VCC pin of the first MCU controller (1), the 2nd VCC pin of the 2nd MCU controller (2) connect
Positive pole is connect, capacitor C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6, institute are connected in parallel between the anode and cathode of power supply
It states capacitor C2 and resistance R1 is connected in series, resistance R2 is connected in series in the capacitor C3, and resistance R3 is connected in series in the capacitor C4, described
Resistance R4 is connected in series in capacitor C5, and resistance R5 is connected in series in the capacitor C6, the node connection between capacitor C2 and resistance R1 the
First Ds pin of one MCU controller (1), the node between capacitor C3 and resistance R2 connect the first of the first MCU controller (1)
2nd SHcp pin of SHcp pin, the 2nd MCU controller (2), the node between capacitor C4 and resistance R3 connect the first MCU control
2nd STcp pin of the first STcp pin of device (1) processed, the 2nd MCU controller (2), the node between capacitor C5 and resistance R4
Q7 ' the pin of the first MCU controller (1), the 2nd Ds pin of the 2nd MCU controller (2) are connected, between capacitor C6 and resistance R5
Node connect the 2nd MR pin of the first MR pin of the first MCU controller (1), the 2nd MCU controller (2), described first
The first Q1 pin, the first Q2 pin, the first Q3 pin, the first Q4 pin, the first Q5 pin, the first Q6 pipe of MCU controller (1)
Foot is respectively connected with light emitting diode, and the light emitting diode is connected in series with resistance R6, and the light emitting diode is in parallel to be connected
Be connected to the 2nd Q6 pin of the 2nd MCU controller (2), the 2nd Q0 pin of the 2nd MCU controller (2), the 2nd Q1 pin,
2nd Q2 pin, the 2nd Q3 pin, the 2nd Q4 pin connection group of four figures display tube, the second of the 2nd MCU controller (2)
Q5 pin, the 2nd Q6 pin connect double figures code display tube.
2. a kind of circuit for realizing LED driving by shift register according to claim 1, it is characterised in that: institute
State the first MCU controller (1), the 2nd MCU controller (2) model it is identical be 74HC595 chip.
3. a kind of circuit for realizing LED driving by shift register according to claim 1, it is characterised in that: institute
State series connection capacitor C1 between the 2nd VCC pin and power cathode of the 2nd MCU controller (2).
4. a kind of circuit for realizing LED driving by shift register according to claim 1, it is characterised in that: institute
Stating resistance R1, resistance R2, resistance R3, resistance R4 is 5.1K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910135519.3A CN109637439A (en) | 2019-02-22 | 2019-02-22 | A kind of circuit for realizing LED driving by shift register |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910135519.3A CN109637439A (en) | 2019-02-22 | 2019-02-22 | A kind of circuit for realizing LED driving by shift register |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109637439A true CN109637439A (en) | 2019-04-16 |
Family
ID=66065758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910135519.3A Pending CN109637439A (en) | 2019-02-22 | 2019-02-22 | A kind of circuit for realizing LED driving by shift register |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109637439A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277030A (en) * | 2019-05-31 | 2019-09-24 | 海盐迪兰电器科技有限公司 | A kind of warm-air drier status display panel with clocking capability |
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| US7104452B2 (en) * | 2004-09-22 | 2006-09-12 | International Business Machines Corporation | Method and system for a bar code simulator |
| CN201435198Y (en) * | 2009-05-29 | 2010-03-31 | 陈守约 | Digital pipe display circuit |
| CN102929167A (en) * | 2012-09-26 | 2013-02-13 | 湖南大学 | Finished automobile intelligent controller of journey increasing type electromobile |
| CN204634106U (en) * | 2015-04-30 | 2015-09-09 | 湖北工程学院 | A kind of sub-chest card drive circuit of LED electrical of 12 × 48 dot matrix |
| CN205987453U (en) * | 2016-07-12 | 2017-02-22 | 湖北工程学院 | A LED drive circuit that glistens for electron firecrackers |
| CN206472346U (en) * | 2017-02-04 | 2017-09-05 | 上海比索电子科技股份有限公司 | A kind of intensity adjustable LED display instruments |
| CN107218646A (en) * | 2017-05-25 | 2017-09-29 | 浙江品太电气有限公司 | Internet of Things intelligent bathroom heater is switched |
-
2019
- 2019-02-22 CN CN201910135519.3A patent/CN109637439A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7104452B2 (en) * | 2004-09-22 | 2006-09-12 | International Business Machines Corporation | Method and system for a bar code simulator |
| CN201435198Y (en) * | 2009-05-29 | 2010-03-31 | 陈守约 | Digital pipe display circuit |
| CN102929167A (en) * | 2012-09-26 | 2013-02-13 | 湖南大学 | Finished automobile intelligent controller of journey increasing type electromobile |
| CN204634106U (en) * | 2015-04-30 | 2015-09-09 | 湖北工程学院 | A kind of sub-chest card drive circuit of LED electrical of 12 × 48 dot matrix |
| CN205987453U (en) * | 2016-07-12 | 2017-02-22 | 湖北工程学院 | A LED drive circuit that glistens for electron firecrackers |
| CN206472346U (en) * | 2017-02-04 | 2017-09-05 | 上海比索电子科技股份有限公司 | A kind of intensity adjustable LED display instruments |
| CN107218646A (en) * | 2017-05-25 | 2017-09-29 | 浙江品太电气有限公司 | Internet of Things intelligent bathroom heater is switched |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277030A (en) * | 2019-05-31 | 2019-09-24 | 海盐迪兰电器科技有限公司 | A kind of warm-air drier status display panel with clocking capability |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190416 |
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| RJ01 | Rejection of invention patent application after publication |