CN108806569A - A kind of digital display module - Google Patents
A kind of digital display module Download PDFInfo
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- CN108806569A CN108806569A CN201810607944.3A CN201810607944A CN108806569A CN 108806569 A CN108806569 A CN 108806569A CN 201810607944 A CN201810607944 A CN 201810607944A CN 108806569 A CN108806569 A CN 108806569A
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- 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
- G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
- G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
- G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
- G09G3/14—Semiconductor devices, e.g. diodes
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention provides a kind of digital display module, the digital display module includes MCU, the first charactron LED1 to the 7th charactron LED7, first resistor R1 to the 7th resistance R7, the first triode Q1 to the 7th triode Q7 and 7 current-limiting resistances, the digital display module can make display of the realization to electric current, high and medium voltage, and resistance, capacitance and the current-limiting resistance being arranged can prevent overtension, prevent the damage of charactron, improve the stability that digital display module is shown, the service life for improving charactron provides conveniently for user's operation.
Description
Technical field
The invention belongs to electronic communication technology field, more particularly to a kind of digital display module.
Background technology
It is provided on household electrical appliance, such as smoke exhaust ventilator, washing machine etc. for user-friendly and understand its work
The digital screen of voltage and current.The electric current and power supply of digital screen display are realized by the digital display module on electric-controlled plate
Display comprising display unit and driving unit, display unit are generally made of charactron, and driving unit is generally a MCU,
It is connected by pin with charactron, the display for controlling charactron；But digital display module disclosed in the prior art by
In no current limiting unit, and then it is easily damaged charactron, causes to show corresponding parameter on digital screen, is the operation of user
It makes troubles.
Invention content
Of the existing technology in order to solve the problems, such as, the present invention provides a kind of digital display module with current limiting unit.
Specific technical solution of the present invention is as follows：
The present invention provides a kind of digital display module, which includes：
Driving unit：Display for driving and controlling voltage and current；
Current limiting unit：It is connected with driving unit, the voltage and current for being exported to driving unit carries out current limliting；
Display unit：It is connected with driving unit and current limiting unit, for showing corresponding voltage and current.
Further to improve, the driving unit includes MCU, first resistor R1 to the 7th resistance R7 and the first triode Q1
To the 7th triode Q7；The display unit include the first charactron LED1, the second charactron LED2, third charactron LED3,
4th charactron LED4, the 5th charactron LED5, the 6th charactron LED6 and the 7th charactron LED7；The current limiting unit includes
7 current-limiting resistances；19 pins of the MCU pass through by the ground level of first resistor R1 the first triodes of connection Q1,18 pins
The ground level of two resistance R2 the second triodes of connection Q2, by the ground level of 3rd resistor R3 connection third transistors Q3,1 draws 20 pins
Foot passes through the 5th triode Q5's of the 5th resistance R5 connections by the ground level of the 4th triode Q4 of the 4th resistance R4 connections, 2 pins
Ground level, 9 pins pass through the 7th resistance R7 connections the seven or three by the ground level of the 6th triode Q6 of the 6th resistance R6 connections, 7 pins
The ground level of pole pipe Q7,11 pins to 17 pins are respectively connected with current-limiting resistance, and 8 pins connect+5V power supplys, 10 pins ground connection；First number
Code pipe LED1, the second charactron LED2, third charactron LED3, the 4th charactron LED4, the 5th charactron LED5, the 6th number
Pipe LED6 and the 7th charactron LED7 are connected with current-limiting resistance；The emitter of the first triode Q1 to the 7th triode Q7
Successively with the first charactron LED1, the second charactron LED2, third charactron LED3, the 4th charactron LED4, the 5th charactron
LED5, the 6th charactron LED6 and the 7th charactron LED7 connections, and collector connects+5V power supplys.
Further to improve, the digital display module further includes the filter unit being connected with driving unit, the filtering
Unit includes the first capacitance C1, the second capacitance C2, the tenth resistance R10 and third capacitance C3；8 pins of the MCU are separately connected
The first end of first capacitance C1, the first end of the first end of the second capacitance C2 and third capacitance C3 simultaneously connect+5V power supplys, the MCU
10 pins be separately connected the second end of the first capacitance C1, the first end of the second end and the tenth resistance R10 of the second capacitance C2, institute
State the tenth resistance R10 second end connect with the second end of third capacitance C3 after be grounded.
Further to improve, the driving unit further includes the first electrolytic capacitor Ca, the 8th resistance R8, the second electrolytic capacitor
The first end of Cb and the 9th resistance R9, the first electrolytic capacitor Ca are connected by 3 pins of the 8th resistance R8 and MCU, and second
The first end of termination+5V power supplys, the second electrolytic capacitor Cb is connected by 3 pins of the 9th resistance R9 and MCU, the second termination
+ 5V power supplys.
Further to improve, the digital display module further includes the inspection being respectively arranged between current-limiting resistance and each charactron
Unit is surveyed, the detection unit includes the 9th triode Q9, the negative-phase input of the second end connection of collector and current-limiting resistance
The second of the second end connection of the first comparator T1 and normal phase input end and current-limiting resistance that are connect with the second end of current-limiting resistance
Comparator T2；The emitter of the 9th triode Q9 connects+5V power supplys, and ground level connects the anode of the second diode D2, and described the
The normal phase input end of one comparator T1 meets a reference value Vref2, and the negative-phase input of the second comparator T2 connects a reference value
The output end of Vref3, the first comparator T1 and the second comparator T2 are connect with the first input end of the first NAND gate F1,
The collector of the second the 9th triode Q9 of input termination of the first NAND gate F1, the tenth triode Q10 of third output termination
Ground level, the emitter ground connection of the tenth triode Q10, collector passes through the first diode D1 and connects the first adjustable resistance
The second end of R11 and the second adjustable resistance R12, the second adjustable resistance R12 the cathode sum number with the second diode D2 respectively
Code pipe connection.
Further to improve, the digital display module further includes being set to+5V power supplys and the first triode Q1 to the seven or three
Regulator control block between the collector of pole pipe Q7, the regulator control block include respectively with the first triode Q1 to the 7th
The third diode D3 of the collector connection of triode Q7, the anode of the third diode D3 pass through the 27th resistance R27
It is connect respectively with the ground level of the first end of thirteenth resistor R13, the first end of the 14th resistance R14 and the 11st triode Q11,
The second end of the thirteenth resistor R13 and the second end of the 14th resistance R14 connect with the ground level of the 12nd triode Q12
It connects, the emitter ground connection of the 12nd triode Q12, collector connects the cathode of the 6th diode D6, the six or two pole
The anode of pipe D6 is separately connected the cathode of the cathode and the 4th diode D4 of the 5th diode D5, the sun of the 4th diode D4
It is connect with the collector of the 11st triode Q11 after the connection of the anode of pole and the 5th diode D5, the 11st triode
The emitter of Q11 is separately connected the first end of the first end and the 5th capacitance C5 of the 4th capacitance C4, and the of the 4th capacitance C4
It is connect with+5V power supplys after the connection of the second end of two ends and the 5th capacitance C5.
Further to improve, the digital display module further includes the photosensitive detection unit being connect with driving unit, described
Photosensitive detection unit includes the first photo resistance RL1 and the second photo resistance RL2, the first end of the first photo resistance RL1
It is connect with VDD signal, the second end of the first photo resistance RL1 is separately connected the 6th capacitance by the second photo resistance RL2
The second end of the first end of the first end of C6 and the 7th capacitance C7, the 6th capacitance C6 is connected with the second end of the 7th capacitance C7
After be grounded, the second end of the 6th capacitance C6 is also respectively connected with the first end and the 16th resistance R16 of the 15th resistance R15
The second end of first end, the 15th resistance R15 is connect with the first end of 4 pins of MUC and the 8th capacitance C8 respectively, described
The second end of 8th capacitance C8 is grounded after being connect with the second end of the 16th resistance R16.
It is further to improve, the digital-scroll technique unit further include be respectively arranged on it is bright between driving unit and current limiting unit
Degree regulation and control unit, the brightness control unit includes third comparator T3 and the 4th comparator T4, the third comparator T3's
11 pins to 17 pins that the normal phase input end of negative-phase input and the 4th comparator T4 pass through the 28th resistance R28 and MUC
In the connection of a pin, the normal phase input end of the third comparator T3 meets a reference value Vref4, the 4th comparator T4's
The output end that negative-phase input meets a reference value Vref5, the third comparator T3 and the 4th comparator T4 is separately connected the 17th
The first end of the first end of resistance R17 and the 18th resistance R18, the second end connection the 13rd of the 17th resistance R17
The ground level of pole pipe Q13, the emitter ground connection of the 13rd triode Q13, collector are separately connected the 21st resistance R21's
The collector of first end and the 15th triode Q15, the emitter and the 21st resistance R21 of the 15th triode Q15
Second end connection after be grounded, the ground level of the 15th triode Q15 passes through the 16th pole of the 22nd resistance R22 connections
The ground level of pipe Q16, the emitter ground connection of the 16th triode Q16, collector connects the anode of the 8th diode D8, described
The second end of 18th resistance R18 connects the ground level of the 14th triode Q14, and the emitter of the 14th triode Q14 connects
Ground, collector connect the anode of the 7th diode D7, and the cathode of the 7th diode D7 passes through the 19th resistance R19 connections the
The first end of 20 resistance R20, the second end of the 20th resistance R20 connect with the cathode of the 8th diode D8 after with current limliting
The first end of resistance connects.
Further to improve, the driving unit further includes 7 conducting control subelements, and 7 conducting control are single
Member respectively includes first end and is connect respectively with 1 pin of MCU, 2 pins, 7 pins, 9 pins, 18 pins, 19 pins and 20 pins
The 26th resistance R26, the second end of the 26th resistance R26 is separately connected the first end and second of the 9th capacitance C9
The first end of 15 resistance R25, the second end of the 9th capacitance C9 be separately connected the second NAND gate F2 first input end and
Ground connection, the second input terminal of the second NAND gate F2 connect the collector of the 18th triode Q18, the 18th triode
The emitter of Q18 connects+5V power supplys, the second end ground connection of the 25th resistance R25, and the ground level of the 18th triode Q18 leads to
The anode of the tenth diode D10 of the 25th resistance R24 connections is crossed, the third output end of the second NAND gate F2 passes through second
The ground level of the 17th triode Q17 of 13 resistance R23 connections, the emitter ground connection of the 17th triode Q17, collector connect
Connect the anode of the 9th diode D9, the cathode of the 9th diode D9 connect with the cathode of the tenth diode D10 after with first
The first end of correspondence resistance in resistance R1 to the 7th resistance R7 connects.
Beneficial effects of the present invention are：Digital display module provided by the invention respectively carries out electric current, high and medium voltage
Control display, current-limiting resistance, resistance and the triode of setting play the role of current limliting and prevent overtension, and then prevent number
The damage of pipe improves the service life of stability and charactron that digital display module is shown, is provided conveniently for user's operation.
Description of the drawings
Fig. 1 is the circuit diagram of 1 digital display module of embodiment；
Fig. 2 is the circuit diagram of 2 digital display module of embodiment；
Fig. 3 is the circuit diagram of 3 digital display module of embodiment；
Fig. 4 is the circuit diagram of 4 digital display module of embodiment；
Fig. 5 is the circuit diagram of 5 digital display module of embodiment；
Fig. 6 is the circuit diagram of 6 digital display module of embodiment；
Fig. 7 is the circuit diagram of 7 digital display module of embodiment；
Fig. 8 is the circuit diagram of 8 digital display module of embodiment.
Specific implementation mode
Embodiment 1
A kind of digital display module that the embodiment of the present invention 1 provides, the digital display module include：
Driving unit：Display for driving and controlling voltage and current；
Current limiting unit：It is connected with driving unit, the voltage and current for being exported to driving unit carries out current limliting；
Display unit：It is connected with driving unit and current limiting unit, for showing corresponding voltage and current.
The driving unit includes MCU, first resistor R1 to the 7th resistance R7 and the first triode Q1 to the 7th triode
Q7；The display unit includes the first charactron LED1, the second charactron LED2, third charactron LED3, the 4th charactron
LED4, the 5th charactron LED5, the 6th charactron LED6 and the 7th charactron LED7；The current limiting unit includes 7 current limliting electricity
Resistance.
In conjunction with Fig. 1, specific connection relation is as follows between each device of digital display module provided by the invention：MCU's
The first end of 19 pins connection first resistor R1, the ground level of the first triode Q1 of second end connection of first resistor R1, the one or three
The emitter of pole pipe Q1 connects 66 pins of the first charactron LED1 and collector connects+5V power supplys；The 18 pins connection second of MCU
The first end of resistance R2, the second end of second resistance R2 connect the ground level of the second triode Q2, the emitter of the second triode Q2
76 pins and collector for connecting the second charactron LED2 connect+5V power supplys；The first of the 20 pins connection 3rd resistor R3 of MCU
The emitter connection third at end, the ground level of the second end connection third transistor Q3 of 3rd resistor R3, third transistor Q3 is digital
53 pins and collector of pipe LED3 connect+5V power supplys；1 pin of MCU connects the first end of the 4th resistance R4, the 4th resistance R4's
Second end connects the ground level of the 4th triode Q4, the emitter of the 4th triode Q4 connect 33 pins of the 4th charactron LED4 and
Collector connects+5V power supplys；2 pins of MCU connect the first end of the 5th resistance R5, the second end connection the five or three of the 5th resistance R5
The emitter of the ground level of pole pipe Q5, the 5th triode Q5 connects 43 pins of the 5th charactron LED5 and collector connects+5V power supplys；
9 pins of MCU connect the first end of the 6th resistance R6, the ground level of the 6th triode Q6 of the 6th resistance R6 connections, the 6th triode
The emitter of Q6 connects 63 pins of the 6th charactron LED6 and collector connects+5V power supplys；7 pins of MCU connect the 7th resistance
The first end of R7, the second end of the 7th resistance R7 connect the ground level of the 7th triode Q7, and the emitter of the 7th triode Q7 connects the
93 pins and collector of seven charactron LED7 connect+5V power supplys；The first end of the 11 pins connection current-limiting resistance Ra of MCU, 12 draw
Foot connects the first end of current-limiting resistance Rb, and 13 pins connect the first end of current-limiting resistance Rc, and 14 pins connect current-limiting resistance Rd's
First end, 15 pins connect the first end of current-limiting resistance Re, and 16 pins connect the first end of current-limiting resistance Rf, 17 pins connection limit
8 pins of the first end of leakage resistance Rg, MCU connect+5V power supplys, 10 pins ground connection, and 5 pins connect the third end of socket XS；First
67 pins, 73 pins, 68 pins, 69 pins, 71 pins, 74 pins and 72 pins of charactron LED1 respectively with current-limiting resistance
The second end of Ra, current-limiting resistance Rb, current-limiting resistance Rc, current-limiting resistance Rd, current-limiting resistance Re, current-limiting resistance Rf and current-limiting resistance Rg
Connection；77 pins, 83 pins, 78 pins, 79 pins, 81 pins, 84 pins and 82 pins of second charactron LED2 respectively with
Current-limiting resistance Ra, current-limiting resistance Rb, current-limiting resistance Rc, current-limiting resistance Rd, current-limiting resistance Re, current-limiting resistance Rf and current-limiting resistance Rg
Second end connection；52 pins, 46 pins, 51 pins, 50 pins, 48 pins, 45 pins and 47 of third charactron LED3 draw
Foot respectively with current-limiting resistance Ra, current-limiting resistance Rb, current-limiting resistance Rc, current-limiting resistance Rd, current-limiting resistance Re, current-limiting resistance Rf and limit
The second end of leakage resistance Rg connects；32 pins of 4th charactron LED4,26 pins, 31 pins, 30 pins, 28 pins, 25 are drawn
Foot and 27 pins are electric with current-limiting resistance Ra, current-limiting resistance Rb, current-limiting resistance Rc, current-limiting resistance Rd, current-limiting resistance Re, current limliting respectively
Resistance Rf is connected with the second end of current-limiting resistance Rg；42 pins of 5th charactron LED5,36 pins, 41 pins, 40 pins, 38 are drawn
Foot, 35 pins and 37 pins respectively with current-limiting resistance Ra, current-limiting resistance Rb, current-limiting resistance Rc, current-limiting resistance Rd, current-limiting resistance
Re, current-limiting resistance Rf are connected with the second end of current-limiting resistance Rg；62 pins of 6th charactron LED6,56 pins, 61 pins, 60
Pin, 58 pins, 55 pins and 57 pins respectively with current-limiting resistance Ra, current-limiting resistance Rb, current-limiting resistance Rc, current-limiting resistance Rd,
Current-limiting resistance Re, current-limiting resistance Rf are connected with the second end of current-limiting resistance Rg；92 pins of 7th charactron LED7,86 pins,
91 pins, 90 pins, 88 pins, 85 pins and 87 pins respectively with current-limiting resistance Ra, current-limiting resistance Rb, current-limiting resistance Rc, limit
Leakage resistance Rd, current-limiting resistance Re, current-limiting resistance Rf are connected with the second end of current-limiting resistance Rg.MCU models STC15W402AS.
The charactrons of the first charactron LED1 to the 7th LED7 of the present invention forms display unit, wherein the first charactron LED1
With the second charactron LED2 for showing electric current, third charactron LED3 to the 5th charactron LED5 is for showing high pressure, the 6th
Charactron LED6 and the 7th charactron LED7 in showing for pressing.
The operation principle of digital display module provided by the invention is as follows：
Driving unit controls the charactron display to electric current, high and medium voltage respectively, is connected to driving unit and charactron
Between current-limiting resistance play the role of divide current limliting, the resistance and triode being connect with charactron, which play, prevents overtension
The damage that resistance, triode and current-limiting resistance can be used for preventing charactron is added in digital display module, improves digital for effect
The stability that display module is shown improves the service life of charactron, is provided conveniently for user's operation.
Embodiment 2
The digital display module that the embodiment of the present invention 2 provides is essentially identical with embodiment 1, the difference is that, such as Fig. 2
Shown, the digital display module further includes the filter unit being connected with driving unit, and the filter unit includes the first capacitance
C1, the second capacitance C2, the tenth resistance R10 and third capacitance C3；8 pins of the MCU are separately connected the first of the first capacitance C1
End, the first end of the second capacitance C2 and third capacitance C3 first end and connect+5V power supplys, 10 pins of the MCU are separately connected
The first end of the second end of first capacitance C1, the second end and the tenth resistance R10 of the second capacitance C2, the tenth resistance R10's
Second end is grounded after being connect with the second end of third capacitance C3.
The present invention plays filter action, 4 members by introducing the first capacitance, the second capacitance, third capacitance and the tenth resistance
Special connection relation can significantly improve filter effect between device, and filter effect improves 25.3%, and reduces now defeated
The ripple of the DC power supply gone out so that the electric current of output is more stablized.
Embodiment 3
The digital display module that the embodiment of the present invention 3 provides is essentially identical with embodiment 2, the difference is that, such as Fig. 3
Shown, the driving unit further includes the first electrolytic capacitor Ca, the 8th resistance R8, the second electrolytic capacitor Cb and the 9th resistance R9,
The first end of the first electrolytic capacitor Ca is connected by 3 pins of the 8th resistance R8 and MCU, and the second termination+5V power supplys are described
The first end of second electrolytic capacitor Cb is connected by 3 pins of the 9th resistance R9 and MCU, the second termination+5V power supplys.
Storage is played by the way that the first electrolytic capacitor Ca, the 8th resistance R8, the second electrolytic capacitor Cb and the 9th resistance R9 is arranged
The effect of electric current and voltage.
Embodiment 4
The digital display module that the embodiment of the present invention 4 provides is essentially identical with embodiment 1, the difference is that, such as Fig. 4
Shown, the digital display module further includes the detection unit being respectively arranged between current-limiting resistance and each charactron, the detection
Unit include the 9th triode Q9 of the second end connection of collector and current-limiting resistance, negative-phase input and current-limiting resistance second
Hold the second comparator T2 of the first comparator T1 and the connection of the second end of normal phase input end and current-limiting resistance of connection；Described 9th
The emitter of triode Q9 connects+5V power supplys, and ground level connects the anode of the second diode D2, and the positive of the first comparator T1 is defeated
The negative-phase input for entering to terminate a reference value Vref2, the second comparator T2 meets a reference value Vref3, the first comparator T1
It is connect with the first input end of the first NAND gate F1 with the output end of the second comparator T2, the second of the first NAND gate F1
The collector of the 9th triode Q9 of input termination, the ground level of the tenth triode Q10 of third output termination, the tenth triode
The emitter of Q10 is grounded, and collector passes through first diode D1 series connection the first adjustable resistance R11 and the second adjustable resistance R12, institute
The second end for stating the second adjustable resistance R12 is connect with the cathode of the second diode D2 and charactron respectively.
The operation principle of inspection unit provided by the invention is as follows：
Wherein a reference value Vref2 is more than Vref3, first comparator T1 and the second comparator T2 by the electricity of a certain current-limiting resistance
Flow valuve A is compared with a reference value Vref2 and Vref3, when A is located between a reference value Vref2 and Vref3, the first NAND gate
F1 exports low level, and value is less than preset value, is set according to the stationary value of the second diode D2, the second diode D2 quilts
Cut-off, due to the 9th triode Q9 acquisitions+5V power supplies, after the first NAND gate F1, Q10 is switched on, and electric current can by first
Output, can be by regulating and controlling the first adjustable resistance in this access to each charactron after adjusting resistance R11 and the second adjustable resistance R12
The resistance value of R11 and the second adjustable resistance R12 control the size of electric current, and the essence of regulation and control is remarkably improved after two adjustable resistance crossfires
Degree；When A is more than Vref2 or is less than Vref3, the first NAND gate F1 exports high level, and the second diode D2 is breakdown, at this point,
The ground level of Q9 obtains enough bias voltages, and the collector voltage of the 9th triode Q9 is 0, so the 9th triode is closed,
Tenth triode Q10 is ended, and output end is blocked.It is every that each charactron can be controlled by the inspection and regulation and control of inspection unit
The brightness of one section of display, makes to be in a constant range by the electric current of each section, and then it is equal to ensure that each section is shown
Even property improves display effect, and can control the conducting of each section.
Embodiment 5
The digital display module that the embodiment of the present invention 5 provides is essentially identical with embodiment 1, the difference is that, such as Fig. 5
It is shown, the digital display module further include set on+5V power supplys and the first triode Q1 to the 7th triode Q7 collector it
Between regulator control block, the regulator control block includes the collector with the first triode Q1 to the 7th triode Q7 respectively
The anode of third the diode D3, the third diode D3 of connection by the 27th resistance R27 respectively with thirteenth resistor
The first end of R13, the first end of the 14th resistance R14 are connected with the ground level of the 11st triode Q11, the thirteenth resistor
The second end of R13 and the second end of the 14th resistance R14 are connect with the ground level of the 12nd triode Q12, and the described 12nd
The emitter of pole pipe Q12 is grounded, and collector connects the cathode of the 6th diode D6, and the anode of the 6th diode D6 connects respectively
Connect the cathode of the cathode and the 4th diode D4 of the 5th diode D5, the anode and the 5th diode D5 of the 4th diode D4
Anode connection after connect with the collector of the 11st triode Q11, the emitter of the 11st triode Q11 connects respectively
Connect the first end of the first end and the 5th capacitance C5 of the 4th capacitance C4, the second end of the 4th capacitance C4 and the 5th capacitance C5's
It is connect with+5V power supplys after second end connection.
Regulator control block operation principle provided by the invention is as follows：
+ 5V the power supplys provided for each charactron are first passed through and are filtered, the 11st triode Q11 and the 4th is then passed through
Under the action of diode D4 to the 6th diode D6 and the 12nd triode, in a certain range by voltage stabilization, then lead to again
Cross the partial pressure of thirteenth resistor R13 and the 14th resistance R14 and the regulation and control of the 27th resistance R27 so that flow through each number
The electric current of pipe is all constant current, ensures the uniformity shown between each charactron.
Embodiment 6
The digital display module that the embodiment of the present invention 6 provides is essentially identical with embodiment 1, the difference is that, such as Fig. 6
Shown, the digital display module further includes the photosensitive detection unit being connect with driving unit, and the photosensitive detection unit includes
First photo resistance RL1 and the second photo resistance RL2, the first end of the first photo resistance RL1 are connect with VDD signal, institute
The second end for stating the first photo resistance RL1 is separately connected the first end and the 7th of the 6th capacitance C6 by the second photo resistance RL2
The first end of capacitance C7, the second end of the 6th capacitance C6 are grounded after being connected with the second end of the 7th capacitance C7, and the described 6th
The second end of capacitance C6 is also respectively connected with the first end of the first end and the 16th resistance R16 of the 15th resistance R15, and the described tenth
The second end of five resistance R15 is connect with the first end of 4 pins of MUC and the 8th capacitance C8 respectively, and the of the 8th capacitance C8
Two ends are grounded after being connect with the second end of the 16th resistance R16.
Photosensitive detection unit operation principle provided by the invention is as follows：
First photo resistance RL1 and the second photo resistance RL2 can accurately incude external photosensor signal, and pass through capacitance
Filtering after, it is corresponding to MUC by the 8th capacitance C8 voltage outputs after the 15th resistance R15 and the 16th resistance R16
Signal；As the first photo resistance RL1 and the second photo resistance RL2 induced environment light intensity, the 8th capacitance C8 exports high brightness mould
Quasi- signal, otherwise output low-light level analog signal.
Embodiment 7
The digital display module that the embodiment of the present invention 7 provides is essentially identical with embodiment 7, the difference is that, such as Fig. 7
Shown, the digital-scroll technique unit further includes the brightness control unit being respectively arranged between driving unit and current limiting unit, described
Brightness control unit includes third comparator T3 and the 4th comparator T4, the negative-phase input and the 4th of the third comparator T3
Pin connection in 11 pins to 17 pins that the normal phase input end of comparator T4 passes through the 28th resistance R28 and MUC,
The normal phase input end of the third comparator T3 meets a reference value Vref4, and the negative-phase input of the 4th comparator T4 connects benchmark
The output end of value Vref5, the third comparator T3 and the 4th comparator T4 be separately connected the 17th resistance R17 first end and
The first end of 18th resistance R18, the second end of the 17th resistance R17 connects the ground level of the 13rd triode Q13, described
The emitter of 13rd triode Q13 is grounded, and collector is separately connected first end and the 15th pole of the 21st resistance R21
The collector of pipe Q15, the emitter of the 15th triode Q15 are grounded after being connect with the second end of the 21st resistance R21,
The ground level of the 15th triode Q15 is by the ground level of the 16th triode Q16 of the 22nd resistance R22 connections, and described
The emitter of 16 triode Q16 is grounded, and collector connects the anode of the 8th diode D8, and the of the 18th resistance R18
Two ends connect the ground level of the 14th triode Q14, the emitter ground connection of the 14th triode Q14, collector connection the 7th
The cathode of the anode of diode D7, the 7th diode D7 passes through the first of the 20th resistance R20 of the 19th resistance R19 connections
End, the second end of the 20th resistance R20 are connect after being connect with the cathode of the 8th diode D8 with the first end of current-limiting resistance.
The operation principle of brightness control unit provided by the invention is as follows：
Wherein a reference value Vref4 > Vref2 > Vref3 > Vref5.
After analog signals of the MUC according to the 8th capacitance C8 output, by third comparator T3 and the 4th comparator T4 by MUC
The value A1 of output is compared with a reference value Vref4 and Vref5, when A1 is between Vref4 and Vref5, third comparator
T3 and the 4th comparator T4 output valves are 0, under the multiplication of the 13rd triode Q13 and the 15th triode Q15, the eight or two pole
Pipe D8 is breakdown, and the 16th triode Q16 conductings, electric current flows to current-limiting resistance by the access；When A1 is more than Vref4 or is less than
When Vref5, third comparator and the 4th comparator output valve are 1, and the 7th diode D7 is breakdown, and the 14th triode Q14 is led
Logical, electric current after the 19th resistance R19 and the 20th resistance R20 by exporting to each charactron, wherein the seven or two pole can be set
The stationary value of pipe D7 and the 8th diode D8 regulate and control the conducting situation of two diodes；Regulation and control the can be passed through in this access
The size of the resistance value control electric current of 19 resistance R19 and the 20th resistance R20 so that the electric current flowed through Vref4 and Vref5 it
Between；Then each charactron is being flowed through by current-limiting resistance；The present invention can be by regulating and controlling the resistance value of each resistance come according to ambient light
Size control charactron display brightness, and then improve display effect.
Embodiment 8
The digital display module that the embodiment of the present invention 8 provides is essentially identical with embodiment 1, the difference is that, such as Fig. 8
Shown, the driving unit further includes 7 conducting control subelements, and 7 conducting control subelements respectively include first end
The 26th resistance being connect respectively with 1 pin of MCU, 2 pins, 7 pins, 9 pins, 18 pins, 19 pins and 20 pins
The second end of R26, the 26th resistance R26 is separately connected the first end and the 25th resistance R25 of the 9th capacitance C9
First end, the second end of the 9th capacitance C9 are separately connected first input end and the ground connection of the second NAND gate F2, and described second
The second input terminal of NAND gate F2 connects the collector of the 18th triode Q18, and the emitter of the 18th triode Q18 connects
+ 5V power supplys, the second end ground connection of the 25th resistance R25, the ground level of the 18th triode Q18 pass through the 25th resistance
The third output end of the anode of the tenth diode D10 of R24 connections, the second NAND gate F2 is connected by the 23rd resistance R23
The ground level of the 17th triode Q17, the emitter ground connection of the 17th triode Q17 are connect, collector connects the 9th diode
The anode of D9, the cathode of the 9th diode D9 connect with the cathode of the tenth diode D10 after with first resistor R1 to the 7th
The first end of correspondence resistance in resistance R7 connects.
The operation principle of conducting control subelement provided by the invention is as follows：
MCU controls the conducting of each charactron, then not by the 25th resistance R25 and the 26th resistance R26 outputs
Same resistance value, the 9th capacitance C9 of ground connection export high level or low level according to the height of resistance value, when the 9th capacitance C9 outputs
When high level, the second NAND gate F2 exports low level, and value is less than preset value, is carried out according to the stationary value of the tenth diode D10
Setting, causes the tenth diode D10 to be ended, and the 18th triode Q18 is due to there is+5V power supply power supplies at this time, thus second with
NOT gate F2 starts, the 17th triode Q17 conductings of excitation, and then controls a certain in the first triode Q1 to the 7th triode Q7
Triode ON so that charactron is opened；When the second NAND gate F2 output is high level, value is more than preset value, and the 12nd
Pole pipe D10 is switched on, and the ground level of the 18th triode Q18 obtains enough bias voltages, and the collector voltage of Q18 is 0, output
End is ended, and a certain triode in the first triode Q1 to the 7th triode Q7 is caused to be closed.The conducting that the present invention is arranged
Control subelement can neatly control the conducting of each charactron, improve working efficiency.
Above example is only that the preferred embodiment of the present invention is described, and is not limited the scope of the present invention
Fixed, under the premise of not departing from design spirit of the present invention, those of ordinary skill in the art make technical scheme of the present invention
Various modifications and improvement should all be fallen into the protection domain of claims of the present invention determination.
Claims (9)
1. a kind of digital display module, which is characterized in that the digital display module includes：
Driving unit：Display for driving and controlling voltage and current；
Current limiting unit：It is connected with driving unit, the voltage and current for being exported to driving unit carries out current limliting；
Display unit：It is connected with driving unit and current limiting unit, for showing corresponding voltage and current.
2. digital display module as described in claim 1, which is characterized in that the driving unit includes MCU, first resistor R1
To the 7th resistance R7 and the first triode Q1 to the 7th triode Q7；The display unit includes the first charactron LED1, second
Charactron LED2, third charactron LED3, the 4th charactron LED4, the 5th charactron LED5, the 6th charactron LED6 and the 7th
Charactron LED7；The current limiting unit includes 7 current-limiting resistances；19 pins of the MCU pass through first resistor R1 connections first
The ground level of triode Q1,18 pins pass through 3rd resistor by the ground level of second resistance R2 the second triodes of connection Q2,20 pins
The ground level of R3 connection third transistors Q3,1 pin are passed through by the ground level of the 4th triode Q4 of the 4th resistance R4 connections, 2 pins
The ground level of the 5th triode Q5 of 5th resistance R5 connections, 9 pins are by the ground level of the 6th triode Q6 of the 6th resistance R6 connections, and 7
Pin is respectively connected with current-limiting resistance, 8 pins by the ground level of the 7th triode Q7 of the 7th resistance R7 connections, 11 pins to 17 pins
Connect+5V power supplys, 10 pins ground connection；First charactron LED1, the second charactron LED2, third charactron LED3, the 4th charactron
LED4, the 5th charactron LED5, the 6th charactron LED6 and the 7th charactron LED7 are connected with current-limiting resistance；Described 1st
The emitter of pole pipe Q1 to the 7th triode Q7 successively with the first charactron LED1, the second charactron LED2, third charactron
LED3, the 4th charactron LED4, the 5th charactron LED5, the 6th charactron LED6 and the 7th charactron LED7 connections, and current collection
Extremely connect+5V power supplys.
3. digital display module as described in claim 1, which is characterized in that the digital display module further includes single with driving
The connected filter unit of member, the filter unit include the first capacitance C1, the second capacitance C2, the tenth resistance R10 and third capacitance
C3；8 pins of the MCU are separately connected the first end of the first capacitance C1, the first end of the second capacitance C2 and third capacitance C3's
First end simultaneously connects+5V power supplys, 10 pins of the MCU be separately connected the second end of the first capacitance C1, the second capacitance C2 second
The first end at end and the tenth resistance R10, the second end of the tenth resistance R10 is connect with the second end of third capacitance C3 to be followed by
Ground.
4. digital display module as claimed in claim 3, which is characterized in that the driving unit further includes the first electrolytic capacitor
The first end of Ca, the 8th resistance R8, the second electrolytic capacitor Cb and the 9th resistance R9, the first electrolytic capacitor Ca pass through the 8th electricity
The 3 pins connection of R8 and MCU is hindered, the first end of the second termination+5V power supplys, the second electrolytic capacitor Cb passes through the 9th resistance R9
It is connect with 3 pins of MCU, the second termination+5V power supplys.
5. digital display module as described in claim 1, which is characterized in that the digital display module further includes being respectively arranged on
Detection unit between current-limiting resistance and each charactron, the detection unit include the second end connection of collector and current-limiting resistance
The 9th triode Q9, negative-phase input and current-limiting resistance second end connection first comparator T1 and normal phase input end and limit
Second comparator T2 of the second end connection of leakage resistance；The emitter of the 9th triode Q9 connects+5V power supplys, ground level connection the
The normal phase input end of the anode of two diode D2, the first comparator T1 meets a reference value Vref2, the second comparator T2's
Negative-phase input connect the output end of a reference value Vref3, the first comparator T1 and the second comparator T2 with the first NAND gate
The first input end of F1 connects, the collector of the second the 9th triode Q9 of input termination of the first NAND gate F1, and third is defeated
Go out the ground level of the tenth triode Q10 of termination, the emitter ground connection of the tenth triode Q10, collector passes through the first diode
D1 connect the first adjustable resistance R11 and the second adjustable resistance R12, the second adjustable resistance R12 second end respectively with second
The cathode of diode D2 is connected with charactron.
6. digital display module as described in claim 1, which is characterized in that the digital display module further includes being set to+5V
Regulator control block between power supply and the collector of the first triode Q1 to the 7th triode Q7, the regulator control block packet
Include third the diode D3, the third diode D3 being connect respectively with the collector of the first triode Q1 to the 7th triode Q7
Anode by the 27th resistance R27 respectively with the first end of thirteenth resistor R13, the first end of the 14th resistance R14 and
The ground level of 11st triode Q11 connects, and the second end of the thirteenth resistor R13 and the second end of the 14th resistance R14 are equal
It is connect with the ground level of the 12nd triode Q12, the emitter ground connection of the 12nd triode Q12, collector connection the six or two
The cathode of pole pipe D6, the anode of the 6th diode D6 are separately connected the cathode and the 4th diode D4 of the 5th diode D5
Cathode, the collection after the anode connection of the anode and the 5th diode D5 of the 4th diode D4 with the 11st triode Q11
Electrode connects, and the emitter of the 11st triode Q11 is separately connected the first end and the 5th capacitance C5 of the 4th capacitance C4
It is connect with+5V power supplys after first end, the second end of the 4th capacitance C4 and the second end connection of the 5th capacitance C5.
7. digital display module as described in claim 1, which is characterized in that the digital display module further includes single with driving
The photosensitive detection unit of member connection, the photosensitive detection unit include the first photo resistance RL1 and the second photo resistance RL2, institute
The first end for stating the first photo resistance RL1 is connect with VDD signal, and the second end of the first photo resistance RL1 passes through the second light
Quick resistance RL2 is separately connected the first end of the first end and the 7th capacitance C7 of the 6th capacitance C6, and the second of the 6th capacitance C6
End is grounded after being connected with the second end of the 7th capacitance C7, and the second end of the 6th capacitance C6 is also respectively connected with the 15th resistance
The first end of the first end of R15 and the 16th resistance R16, the second end of the 15th resistance R15 respectively with 4 pins of MUC
It is connected with the first end of the 8th capacitance C8, after the second end of the 8th capacitance C8 is connect with the second end of the 16th resistance R16
Ground connection.
8. digital-scroll technique unit as claimed in claim 7, which is characterized in that the digital-scroll technique unit further includes being respectively arranged on
Brightness control unit between driving unit and current limiting unit, the brightness control unit include the ratios of third comparator T3 and the 4th
Compared with device T4, the negative-phase input of the third comparator T3 and the normal phase input end of the 4th comparator T4 pass through the 28th resistance
Pin connection in 11 pins to 17 pins of R28 and MUC, the normal phase input end of the third comparator T3 connect a reference value
The negative-phase input of Vref4, the 4th comparator T4 connect a reference value Vref5, the third comparator T3 and the 4th comparator
The output end of T4 is separately connected the first end of the first end and the 18th resistance R18 of the 17th resistance R17, the 17th resistance
The second end of R17 connects the ground level of the 13rd triode Q13, the emitter ground connection of the 13rd triode Q13, collector point
Not Lian Jie the 21st resistance R21 first end and the 15th triode Q15 collector, the 15th triode Q15's
Emitter is grounded after being connect with the second end of the 21st resistance R21, and the ground level of the 15th triode Q15 passes through the 20th
The ground level of the 16th triode Q16 of two resistance R22 connections, the emitter ground connection of the 16th triode Q16, collector connection
The anode of 8th diode D8, the second end of the 18th resistance R18 connect the ground level of the 14th triode Q14, and described the
The emitter of 14 triode Q14 is grounded, and collector connects the anode of the 7th diode D7, the cathode of the 7th diode D7
By the first end of the 20th resistance R20 of the 19th resistance R19 connections, the second end and the eight or two of the 20th resistance R20
It is connect with the first end of current-limiting resistance after the cathode connection of pole pipe D8.
9. digital-scroll technique unit as described in claim 1, which is characterized in that the driving unit further includes 7 conducting controls
Subelement, 7 conductings control subelements respectively include first end respectively with 1 pin of MCU, 2 pins, 7 pins, 9 pins,
26th resistance R26 of 18 pins, 19 pins and the connection of 20 pins, the second end of the 26th resistance R26 connect respectively
The first end of the first end and the 25th resistance R25 of the 9th capacitance C9 is connect, the second end of the 9th capacitance C9 is separately connected
Second input terminal of the first input end of the second NAND gate F2 and ground connection, the second NAND gate F2 connects the 18th triode
The emitter of the collector of Q18, the 18th triode Q18 connects+5V power supplys, and the second end of the 25th resistance R25 is grounded,
The ground level of the 18th triode Q18 is by the anode of the tenth diode D10 of the 25th resistance R24 connections, and described second
The third output end of NAND gate F2 is by the ground level of the 17th triode Q17 of the 23rd resistance R23 connections, and the described 17th
The emitter of pole pipe Q17 is grounded, and collector connects the anode of the 9th diode D9, the cathode and the tenth of the 9th diode D9
It is connected with the first end of the corresponding resistance in first resistor R1 to the 7th resistance R7 after the cathode connection of diode D10.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810607944.3A CN108806569A (en) | 2018-06-13 | 2018-06-13 | A kind of digital display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810607944.3A CN108806569A (en) | 2018-06-13 | 2018-06-13 | A kind of digital display module |
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| CN108806569A true CN108806569A (en) | 2018-11-13 |
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| CN201810607944.3A Pending CN108806569A (en) | 2018-06-13 | 2018-06-13 | A kind of digital display module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230408603A1 (en) * | 2021-03-12 | 2023-12-21 | BeiAng Air Tech Ltd. | Driving circuit, magnetic sensing circuit, and electrical device |
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| US11914006B2 (en) * | 2021-03-12 | 2024-02-27 | BeiAng Air Tech Ltd. | Driving circuit, magnetic sensing circuit, and electrical device |
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Application publication date: 20181113 |