CN104332124A - Nixie tube driving circuit and control method thereof - Google Patents
Nixie tube driving circuit and control method thereof Download PDFInfo
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- CN104332124A CN104332124A CN201310308942.1A CN201310308942A CN104332124A CN 104332124 A CN104332124 A CN 104332124A CN 201310308942 A CN201310308942 A CN 201310308942A CN 104332124 A CN104332124 A CN 104332124A
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Abstract
The invention provides a nixie tube driving circuit, which at least comprises a one-bit LED nixie tube or 8 LEDs, wherein the driving circuit comprises a first driving circuit used for driving a cathode of the nixie tube, a second driving circuit used for driving an anode of the nixie tube and a main control chip used for providing driving signals for the first driving circuit and the second driving circuit, the first driving circuit comprises a conversion register and a phase inverter, the input end of the conversion register is connected with the main control chip, and the output end of the conversion register is connected with the cathode of the nixie tube in series through the phase inverter. A control method is also disclosed. The nixie tube driving circuit and the control method thereof reduce the occupation of the I/O port resource of the main control chip, reduce the cost of the main control chip and do not influence the display effect of the nixie tube; by adopting the control method, the problem of light leakage is solved.
Description
Technical field
The present invention relates to field of household appliances, particularly relate to a kind of Nixie tube drive circuit and control method thereof.
Background technology
Household electrical appliance often adopt charactron to show its running status, and such as air conditioner often needs charactron to come displays temperature, running status, failure code etc., generally adopts dibit (or multidigit) charactron to show.In prior art, as depicted in figs. 1 and 2, Nixie tube drive circuit is made up of anode driving circuit 100, negative electrode driving circuit 200 for the driving circuit of dibit charactron and charactron internal circuit.Wherein: the simulation Darlington transistor that positive C OM1, the COM2 of charactron 300 end be made up of 4 triodes, 8 resistance drives, and needs 2 chip I/O control; Cathode terminal A, B, C, D, E, F, G, DP are driven by ULN2003 chip U2 and triode Q1, execute turntable driving realize by 8 I/O causes for gossip of main control chip U1.Existing Nixie tube drive circuit, cathodic control end takies too many chip I/O mouth resource, and main control chip need select the chip of higher cost, is unfavorable for the cost control of household electrical appliance.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of Nixie tube drive circuit and control method thereof.Which reduce taking of chip I/O resource, reduce costs.For achieving the above object, technical scheme of the present invention is as follows:
A kind of Nixie tube drive circuit, described charactron at least comprises a LED charactron or 8 LED,
Described Nixie tube drive circuit comprises:
First driving circuit, for driving the negative electrode of described charactron;
Second driving circuit, for driving the anode of described charactron;
Main control chip, provides drive singal for giving described first driving circuit and the second driving circuit;
Described first driving circuit comprises translation register and phase inverter;
The input end of described translation register connects described main control chip, and output terminal described phase inverter of connecting connects the negative electrode of described charactron.
More preferably, described phase inverter comprises driving chip;
The input end of described driving chip connects the output terminal of described translation register, and the output terminal of described driving chip connects the negative electrode of described charactron.
More preferably, described phase inverter also comprises the first resistance and the first triode, base series first resistance of described first triode connects described translation register, and the collector of described first triode connects one in described 8 LED, the grounded emitter of described first triode.
More preferably, described driving chip is ULN2001, ULN2002, ULN2003 or ULN2004.
More preferably, described first driving circuit also comprises the second resistance, the 3rd resistance and the 4th resistance;
Described translation register is 74HC164 chip;
Described second resistance of serial date transfer mouth series connection of described translation register connects the data port of described main control chip;
Clock control input port described 3rd resistance of series connection of described translation register connects the clock control port of described main control chip;
Described 4th resistance of reseting port series connection of described translation register connects power supply.
More preferably, described second driving circuit comprises the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the second triode and the 3rd triode;
Described in the base series of described second triode, the 8th resistance connects the output terminal of described main control chip, the grounded emitter of described second triode, the collector of described second triode described 5th resistance of connecting respectively is connected the emitter of described 3rd triode with the 6th resistance, the emitter of described 3rd triode connects direct supply;
The base stage of described 3rd triode connects described 5th resistance and the corresponding common port of the 6th resistance, and described 7th resistance of collector series connection of described 3rd triode is connected to the corresponding common port of charactron.
More preferably, the corresponding common port of described charactron is the anode of described charactron.
More preferably, described second driving circuit comprises driving power chip and the 9th resistance;
The input end of described driving power chip connects described main control chip, and described 9th resistance of output terminal series connection connects the corresponding common port of described charactron.
More preferably, described driving power chip model is KID65783AP/AF;
The corresponding common port of described charactron is the anode of described charactron.
Also relate to a kind of control method of Nixie tube drive circuit, described Nixie tube drive circuit is the Nixie tube drive circuit of above-mentioned arbitrary technical characteristic, and described control method comprises the following steps:
In described charactron each section of LED open order for first to open negative electrode pole, Kaiyang again, shutoff order for first pass anode close negative electrode again.
The invention has the beneficial effects as follows:
Nixie tube drive circuit of the present invention and control method thereof, decrease taking of main control chip I/O port resource, the switching sequence controlling charactron solves leakage problem, relative to the existing Driving technique of charactron, the present invention reduces the cost of main control chip, and does not affect the display effect of charactron.
Accompanying drawing explanation
Fig. 1 is prior art common anode dibit Nixie tube drive circuit figure;
Fig. 2 is the dibit charactron internal circuit diagram of the dibit of common anode shown in Fig. 1 Nixie tube drive circuit;
Fig. 3 is the circuit diagram that Nixie tube drive circuit common anode double figures code pipe of the present invention shows an embodiment;
Fig. 4 is the circuit diagram that Nixie tube drive circuit common anode group of four figures pipe of the present invention shows an embodiment;
The common anode group of four figures pipe internal circuit diagram that Fig. 5 is Nixie tube drive circuit shown in Fig. 4;
Fig. 6 is the circuit diagram of another embodiment of Nixie tube drive circuit common anode group of four figures pipe of the present invention display;
Fig. 7 is the circuit diagram of common cathode group of four figures tube drive circuit;
Fig. 8 is the internal circuit diagram of the group of four figures of common cathode shown in Fig. 7 pipe;
Fig. 9 is the circuit diagram of another embodiment of common cathode group of four figures tube drive circuit.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, Nixie tube drive circuit of the present invention and control method thereof are further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
With reference to Fig. 3 to Fig. 6.As shown in Figure 3, Nixie tube drive circuit one embodiment of the present invention comprises charactron 300, first driving circuit 200(negative electrode driving circuit), the second driving circuit 100(anode driving circuit), main control chip U1:
Charactron 300 at least comprises a LED charactron or 8 LED;
First driving circuit 200 is for driving the negative electrode of charactron 300, and the second driving circuit 100 is for driving the anode of charactron 300;
Main control chip U1 is used for providing drive singal to the first driving circuit 200 and the second driving circuit 100;
First driving circuit 200 comprises translation register U3; Preferably, translation register U3 is 74HC164 chip;
The input end of translation register U3 connects main control chip UI, and output terminal series connection phase inverter connects the negative electrode of charactron 300.
Phase inverter comprises driving chip U2, and the input end of driving chip U2 connects the output terminal of translation register U3, and the output terminal of driving chip U2 connects the negative electrode of charactron 300.Preferably, the chip of driving chip U2 to be model be ULN2001, ULN2002, ULN2003 or ULN2004.
More preferably, as a kind of embodiment, phase inverter also comprises the first resistance R8 and the first triode Q1, the base series first resistance R8 of the first triode Q1 connects translation register U3, the collector of the first triode Q1 connects one (preferred radix point section DP) in 8 LED, the grounded emitter of the first triode Q1.Preferably, the first driving circuit 200 also comprises the second resistance R1 and the 3rd resistance R2;
The serial date transfer mouth of the translation register U3 second resistance R1 that connects connects the data port AB of main control chip U1;
Clock control input port CLK series connection the 3rd resistance R2 of translation register U3 connects the clock control port CLK of main control chip U1.
Wherein, translation register U3 is 74HC164 chip, and 74HC164 chip is 8 bit serial inputs, parallel output translation register.Its supply pin VCC meets power supply+5V, and electric capacity C2 strobes, GND pin ground connection; A1, A2 pin is serial date transfer mouth, and CLK pin is clock control input port, and resistance R1, R2 play metering function; RTS pin is resetting pin (reseting port), and this back warp the 4th resistance R3 meets power supply+5V, then do not carry out reset and arrange; A, B, C, D, E, F, G, H are 8 bit parallel data delivery outlets.
ULN2003 chip U2(also can be ULN2001, ULN2002, ULN2004 chip) be reversed phase converter (phase inverter), when its input end is high level, output terminal is low level.Its power pins 9 connects direct supply, and preferably, this power supply is+12V, also can be chosen as other voltage as required, and GND pin ground connection, electric capacity C1 strobes.
Resistance R8 and NPN triode Q1 forms a phase inverter, and principle is equivalent to the inner road phase inverter of ULN2003 chip U2.
First driving circuit 200 principle: the AB data port of main control chip U1 exports 8 bit data bags, when the state (being controlled by main control chip U1) of the CLK mouth of 74HC164 chip is high level by low transition, packet will move an output at 8 parallel output mouths A, B, C, D, E, F, G, H, thus drive anti-phase conversion chip U2, triode Q1, their output terminal output low level, and then the cathode terminal driving charactron 300.
Second driving circuit 100 comprises the 5th resistance (R10, R14), the 6th resistance (R11, R15), the 7th resistance (R12, R16), the 8th resistance (R9, R13), the second triode (Q2, Q4) the and three triode (Q3, Q5);
Second triode (Q2, Q4) base series the 8th resistance (R9, R13) output terminal (COM1, COM2) of described main control chip U1 is connected, the second triode (Q2, Q4) grounded emitter, the collector of the second triode (Q2, Q4) is connected the 5th resistance (R10, R14) and the 6th resistance (R11 respectively, R15) emitter of the 3rd triode (Q3, Q5) is connected;
3rd triode (Q3, Q5) base stage connects the 5th resistance (R10, R14) the and six resistance (R11, R15) corresponding common port, 3rd triode (Q3, Q5) collector series connection the 7th resistance (R12, R16) is connected to the corresponding common port of charactron 300.The common port of charactron 300 is the anode (common anode) of charactron 300.
Second driving circuit 100 is divided into a charactron high position and low level anode drive, and both drive principle are the same.Here high-order anode drive is described:
When the I/O mouth COM1 of main control chip U1 exports high level, the base stage of NPN triode Q2 has drive singal, Q2 saturation conduction, its collection emitter voltage drop is minimum, and resistance R10 is equivalent to ground connection, and power supply V1(is generally 5V or 12V, also can be other voltages) through resistance R11, R10, triode Q2 to ground, the resistance of reasonable selection R11 and R10, can make PNP triode Q3 saturation conduction, and power supply V1 drives charactron 300 anode tap by PNP triode Q3.
More preferably (see figure 6), as a kind of embodiment, the second driving circuit 100 comprises driving power chip U4 and the 9th resistance (R12, R16, R20, R24);
The input end of driving power chip U4 connects main control chip U1, and output terminal series connection the 9th resistance (R12, R16, R20, R24) connects the corresponding common port of charactron 300 respectively.The model of driving power chip U4 is KID65783AP/AF; The common port of charactron 300 is the anode (common anode) of charactron 300.
The difference of Fig. 4 and Fig. 3 is, charactron 300 shows from 2 Bits Expanding to 4 (4 Digital sum pipe internal circuit diagrams are shown in Fig. 5).Correspondingly, main control chip U1 increases by two and controls mouth COM3, COM4, and the second driving circuit 100 increases two-way.
The difference of Fig. 6 and Fig. 4 is, second driving circuit of charactron 300 changes into and driving with KID65783AP/AF chip U4, KID65783AP/AF chip is 8 passage high level driving power chips, and its output voltage 1.8-2.0V lower than power supply V1, electric capacity C3 strobes.
Nixie tube drive circuit is in control procedure, and its control method comprises the following steps:
In charactron each section of LED (light emitting diode) open order for first to open negative electrode pole, Kaiyang again, shutoff order for first pass anode close negative electrode again.
This control method is adopted to solve the leakage problem of charactron.
Numeral method in above embodiment can also expand to 5-8 position according to actual needs.Common anode charactron also can change common cathode charactron into, as shown in Figure 7 to 9, wherein, the difference of Fig. 7 and Fig. 6 is, second driving circuit 100 becomes negative electrode driving circuit from anode driving circuit, first driving circuit 200 becomes anode driving circuit from negative electrode driving circuit, driving chip U2 in first driving circuit 200 adopts driving power chip U4 to replace, driving power chip U2 in second driving circuit 100 have employed the driving chip U2 of 7, wherein U2 is phase inverter ULN2003, also can be ULN2001, ULN2002, , ULN2004, the corresponding common port of charactron 300 is negative electrode.
In the figure 7, first driving circuit 200 principle is: the AB data port of main control chip U1 exports 8 bit data bags, when the state (being controlled by main control chip U1) of the CLK mouth of 74HC164 chip is converted to low level by high level, packet will move an output at 8 parallel output mouths A, B, C, D, E, F, G, H, thus driving power chip U4 output terminal exports high level, and then drive the anode tap of charactron 300.Second driving circuit 100 is divided into four tunnels, and drive principle is the same, is described here to high-order negative electrode:
When the I/O mouth COM1 of main control chip U1 exports high level, phase inverter U2 the 1st passage has drive singal, and its 1st passage will output low level, thus drives the high-order cathode terminal of charactron 300, and resistance R12 plays metering function.Wherein, current-limiting resistance also can move on between the anode of charactron 300 and power supply chip U4 output terminal, but correspondingly, each road anode all needs current limiting resistance.
The difference of Fig. 9 and Fig. 7 is, the second driving circuit 100 have employed triode and resistance, and the negative electrode of bits per inch code pipe 300 is controlled by a triode.Output terminal (COM1, COM2, the COM3 of main control chip U1, when COM4) exporting high level, triode (Q1, Q2, Q3, Q4) conducting, makes bits per inch code pipe 300 corresponding common port resistance in series (R12, R16, R20, R24) ground connection, the first driving circuit 200 drives the anode of charactron 300, and charactron 300 is lit.
For Fig. 9 and Fig. 7, in charactron, the order of opening of each section of LED (light emitting diode) opens negative electrode again for pole, first Kaiyang, and shutoff order closes anode again for first closing negative electrode.
The Nixie tube drive circuit of above-described embodiment and control method thereof, decrease taking of main control chip I/O port resource, and solve leakage problem.Relative to the existing Driving technique of charactron, the present invention can reduce the cost of main control chip, and does not affect the display effect of charactron.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a Nixie tube drive circuit, described charactron at least comprises a LED charactron or 8 LED, it is characterized in that, comprising:
First driving circuit, for driving the negative electrode of described charactron;
Second driving circuit, for driving the anode of described charactron;
Main control chip, provides drive singal for giving described first driving circuit and the second driving circuit;
Described first driving circuit comprises translation register and phase inverter;
The input end of described translation register connects described main control chip, and output terminal described phase inverter of connecting connects the negative electrode of described charactron.
2. Nixie tube drive circuit according to claim 1, is characterized in that:
Described phase inverter comprises driving chip;
The input end of described driving chip connects the output terminal of described translation register, and the output terminal of described driving chip connects the negative electrode of described charactron.
3. Nixie tube drive circuit according to claim 2, is characterized in that:
Described phase inverter also comprises the first resistance and the first triode, base series first resistance of described first triode connects described translation register, the collector of described first triode connects one in described 8 LED, the grounded emitter of described first triode.
4. Nixie tube drive circuit according to claim 3, is characterized in that:
Described driving chip is ULN2001, ULN2002, ULN2003 or ULN2004.
5. Nixie tube drive circuit according to claim 4, is characterized in that:
Described first driving circuit also comprises the second resistance, the 3rd resistance and the 4th resistance;
Described translation register is 74HC164 chip;
Described second resistance of serial date transfer mouth series connection of described translation register connects the data port of described main control chip;
Clock control input port described 3rd resistance of series connection of described translation register connects the clock control port of described main control chip;
Described 4th resistance of reseting port series connection of described translation register connects power supply.
6. the Nixie tube drive circuit according to any one of claim 1-5, is characterized in that:
Described second driving circuit comprises the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the second triode and the 3rd triode;
Described in the base series of described second triode, the 8th resistance connects the output terminal of described main control chip, the grounded emitter of described second triode, the collector of described second triode described 5th resistance of connecting respectively is connected the emitter of described 3rd triode with the 6th resistance, the emitter of described 3rd triode connects direct supply;
The base stage of described 3rd triode connects described 5th resistance and the corresponding common port of the 6th resistance, and described 7th resistance of collector series connection of described 3rd triode is connected to the corresponding common port of charactron.
7. Nixie tube drive circuit according to claim 6, is characterized in that:
The corresponding common port of described charactron is the anode of described charactron.
8. the Nixie tube drive circuit according to any one of claim 1-5, is characterized in that:
Described second driving circuit comprises driving power chip and the 9th resistance;
The input end of described driving power chip connects described main control chip, and described 9th resistance of output terminal series connection connects the corresponding common port of described charactron.
9. Nixie tube drive circuit according to claim 8, is characterized in that:
Described driving power chip model is KID65783AP/AF;
The corresponding common port of described charactron is the anode of described charactron.
10. a control method for Nixie tube drive circuit, described Nixie tube drive circuit is the Nixie tube drive circuit described in any one of claim 1-9, it is characterized in that, comprises the following steps:
In described charactron each section of LED open order for first to open negative electrode pole, Kaiyang again, shutoff order for first pass anode close negative electrode again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310308942.1A CN104332124A (en) | 2013-07-22 | 2013-07-22 | Nixie tube driving circuit and control method thereof |
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| CN201310308942.1A CN104332124A (en) | 2013-07-22 | 2013-07-22 | Nixie tube driving circuit and control method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105161041A (en) * | 2015-08-28 | 2015-12-16 | 深圳市汇星数字技术有限公司 | Bit-expandable *-shaped nixie tube driving system and digital video parsing system |
| CN105405378A (en) * | 2015-12-03 | 2016-03-16 | 浙江宇视科技有限公司 | Nixie tube driving device and display equipment |
| CN107154238A (en) * | 2017-07-11 | 2017-09-12 | 深圳市同洁科技有限公司 | A kind of electric toothbrush LED dot matrix display devices |
| CN107610630A (en) * | 2017-10-19 | 2018-01-19 | 昆明理工大学 | A kind of charactron |
| CN111441287A (en) * | 2020-05-08 | 2020-07-24 | 深圳市嘉昱机电有限公司 | Mobile control module and system |
| CN112309294A (en) * | 2020-11-06 | 2021-02-02 | 珠海格力电器股份有限公司 | Driving method and device for realizing LED display circuit, storage medium and electronic equipment |
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| CN112309294A (en) * | 2020-11-06 | 2021-02-02 | 珠海格力电器股份有限公司 | Driving method and device for realizing LED display circuit, storage medium and electronic equipment |
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