CN110648619A - Nixie tube display circuit - Google Patents
Nixie tube display circuit Download PDFInfo
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- CN110648619A CN110648619A CN201911031581.4A CN201911031581A CN110648619A CN 110648619 A CN110648619 A CN 110648619A CN 201911031581 A CN201911031581 A CN 201911031581A CN 110648619 A CN110648619 A CN 110648619A
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- 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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Abstract
The application relates to a nixie tube display circuit, which comprises a light-emitting diode, a one-way conduction device and an output circuit, wherein the anode of the light-emitting diode is used for being connected with a power supply, the input end of the one-way conduction device is connected with the cathode of the light-emitting diode, the output end of the one-way conduction device is connected with the output circuit, and the one-way conduction device is used for limiting the current flowing direction to be transmitted to the output end from the input end. Above-mentioned charactron display circuit, the one-way conduction device restriction electric current flow direction is from input transmission to output, when emitting diode switches on, the electric current flows through emitting diode, one-way conduction device and output circuit in proper order, when emitting diode does not switch on, because the one-way current blocking nature of one-way conduction device makes the electric current can not reach the input from the output of one-way conduction device, consequently also can't reach emitting diode's negative pole department, emitting diode does not have the electric current to flow through, keep the off-state, make the information that the charactron shows more accurate, the use reliability of charactron has been improved.
Description
Technical Field
The present application relates to the field of electronic devices, and in particular, to a nixie tube display circuit.
Background
The nixie tube is a commonly used device for display and is formed by packaging a plurality of light emitting diodes together, and the nixie tube displays different numbers or patterns and the like by changing the light emitting conditions of the light emitting diodes at different positions, so that a user can visually acquire displayed information.
When the traditional nixie tube is used, because the light-emitting diode is a nonlinear device, when the nixie tube is applied to a direct current circuit, the nixie tube is influenced by the resistance and the threshold voltage of the light-emitting diode, equivalently, the resistance is connected with the capacitor in parallel, when different light-emitting diodes are connected into a power supply to be turned off alternately, the light-emitting diodes which are not connected into the power supply can bear reverse voltage, so that a little current flows through the light-emitting diodes, the situation of slight brightness occurs, the accuracy of information display of the nixie tube is further influenced.
Disclosure of Invention
Therefore, it is necessary to provide a nixie tube display circuit to solve the problem of low reliability of the conventional nixie tube.
The utility model provides a charactron display circuit, includes emitting diode, one-way conduction device and output circuit, emitting diode's positive pole is used for the access power, the input of one-way conduction device is connected emitting diode's negative pole, the output of one-way conduction device is connected output circuit, one-way conduction device is used for the restriction current flow direction for transmitting to the output from the input.
In the nixie tube display circuit, the anode of the light-emitting diode is used for connecting a power supply, the cathode of the light-emitting diode is connected with the input end of the one-way conduction device, the output end of the one-way conduction device is connected with the output circuit, since the unidirectional conducting device limits the current flow to be transmitted from the input terminal to the output terminal, when the light emitting diode is conducted, the current flows in from the anode of the light-emitting diode, flows out from the cathode of the light-emitting diode, and then is transmitted to the output circuit through the input end and the output end of the one-way conduction device in sequence, because of the one-way current blocking property of the one-way conduction device, the current can not reach the input end from the output end of the one-way conduction device, therefore, the cathode of the light-emitting diode can not be reached, no current flows through the light-emitting diode, and the light-emitting diode keeps in an off state, so that the information displayed by the nixie tube is more accurate, and the use reliability of the nixie tube is improved.
Drawings
FIG. 1 is a block diagram of an embodiment of a nixie tube display circuit;
FIG. 2 is a block diagram of another embodiment of a nixie tube display circuit;
FIG. 3 is a block diagram of a nixie tube display circuit in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described more fully below by way of examples in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In one embodiment, referring to fig. 1, a nixie tube display circuit is provided, which includes a light emitting diode 100, a unidirectional conducting device 200 and an output circuit 300, wherein an anode of the light emitting diode 100 is used for connecting to a power supply, an input terminal of the unidirectional conducting device 200 is connected to a cathode of the light emitting diode 100, an output terminal of the unidirectional conducting device 200 is connected to the output circuit 300, and the unidirectional conducting device 200 is used for limiting a current flowing from the input terminal to the output terminal. Because the unidirectional conducting device 200 limits the current to flow from the input end to the output end, when the light emitting diode 100 is conducted, the current flows in from the anode of the light emitting diode 100, flows out from the cathode of the light emitting diode 100 and then is transmitted to the output circuit 300 through the input end and the output end of the unidirectional conducting device 200 in sequence, when the light emitting diode 100 is not conducted, the current cannot reach the input end from the output end of the unidirectional conducting device 200 due to the unidirectional current blocking property of the unidirectional conducting device 200, therefore, the current cannot reach the cathode of the light emitting diode 100, the light emitting diode 100 has no current flowing through, and the extinguishing state is maintained, so that the information displayed by the nixie tube is more accurate, and the use reliability of the nixie tube.
Specifically, the nixie tube display circuit mainly displays different information through different states of lighting or extinguishing of the light emitting diode 100, the light emitting diode 100 has one-way conductivity, when the anode of the light emitting diode 100 is connected to a power supply, the light emitting diode 100 is conducted and is in a lighting state, when the anode of the light emitting diode 100 is not connected to the power supply, the light emitting diode 100 is turned off and is in an extinguishing state, but at the moment, if a current exists on the cathode side of the light emitting diode 100, the light emitting diode 100 cannot be completely turned off, and a slightly-lit state is presented, so that the accuracy of display is affected. The unidirectional conducting device 200 is connected in series on the cathode side of the light emitting diode 100, specifically, the input end of the unidirectional conducting device 200 is connected to the cathode of the light emitting diode 100, the output end of the unidirectional conducting device 200 is connected to the output circuit 300, and the current flow direction of the unidirectional conducting device 200 is transmitted from the input end to the output end, so the current cannot reach the input end from the output end of the unidirectional conducting device 200, and therefore cannot reach the cathode of the light emitting diode 100. The specific type of the unidirectional conducting device 200 is not unique, and may be, for example, a diode, an anode of the diode is connected to a cathode of the light emitting diode 100, a cathode of the diode is connected to the output circuit 300, when light emitting is conducted, current may sequentially flow through the anode of the light emitting diode 100, the cathode of the light emitting diode 100, the anode of the diode and the cathode of the diode and then reach the output circuit 300, the output circuit 300 outputs a signal, when the diode is not conducted, current on a cathode side of the diode cannot reach the anode of the diode, the diode plays a role of blocking, so that current on the cathode side of the diode cannot reach the cathode of the light emitting diode 100, thereby avoiding affecting an operating state of the light emitting diode 100, the diode as the unidirectional conducting device 200 has a simple structure, and is low in use cost, and the use. It is understood that in other embodiments, the unidirectional conducting device 200 may be other types of devices as long as one skilled in the art can realize the device.
In one embodiment, referring to fig. 3, the number of the light emitting diodes 100 is two or more, the number of the unidirectional conducting devices 200 is equal to the number of the light emitting diodes 100, and the input end of each unidirectional conducting device 200 is connected to the cathode of the corresponding light emitting diode 100. When the number of the light emitting diodes 100 is more than two, the number of the contents that can be displayed is more, so that the application range of the nixie tube display circuit is wider, the number of the unidirectional conducting devices 200 is equal to the number of the light emitting diodes 100, the input end of each unidirectional conducting device 200 is connected with the cathode of the corresponding light emitting diode 100, the cathode side of each light emitting diode 100 is provided with one corresponding unidirectional conducting device 200 to block current, the display accuracy of the light emitting diodes 100 is further ensured, and the use reliability of the nixie tube display circuit is improved.
Specifically, when the number of the light emitting diodes 100 is two or more, different light emitting diodes 100 may be disposed at different positions, and then different patterns may be displayed by controlling the on or off states of different light emitting diodes 100, generally, the more the number of the light emitting diodes 100 is, the more the disposed positions are, the richer the displayable content is, which may satisfy different requirements of the user, and when some of the light emitting diodes 100 have a fault and cannot be lit, the larger the number of the light emitting diodes may enable the user to reasonably infer the content to be displayed, that is, the influence of the fault of the light emitting diode 100 on the display content of the nixie tube is small. In addition, the number of the unidirectional conducting devices 200 is equal to the number of the light emitting diodes 100, the input end of each unidirectional conducting device 200 is connected with the cathode of the corresponding light emitting diode 100, each light emitting diode 100 is correspondingly connected with one unidirectional conducting device 200, each unidirectional conducting device 200 can block current from reaching the cathode of the corresponding connected light emitting diode 100, the reverse conduction of each light emitting diode 100 is controlled, the occurrence of the dim brightness condition is eliminated, the working accuracy of each light emitting diode 100 is improved, and the use reliability of the nixie tube display circuit is further improved.
In one embodiment, referring to fig. 2, the nixie tube display circuit further includes current limiting resistors 400, the number of the current limiting resistors 400 is equal to the number of the unidirectional conducting devices 200, and the output terminal of each unidirectional conducting device 200 is connected to the output circuit 300 through the corresponding current limiting resistor 400. The current limiting resistor 400 can limit the current output by the output terminal of the unidirectional device 200, so as to prevent the output circuit 300 from being affected by the excessive current and provide a protection effect for the output circuit 300.
Specifically, the number of the current limiting resistors 400 is equal to the number of the unidirectional conducting devices 200, the output end of each unidirectional conducting device 200 is connected to the output circuit 300 through the corresponding current limiting resistor 400, that is, each branch of the led 100 is provided with a single-phase conducting device and a current-limiting resistor 400, one end of each current-limiting resistor 400 is connected to the output end of the unidirectional conducting device 200, and the other end is connected to the output circuit 300 after being connected in parallel, when all the light emitting diodes 100 of the nixie tube display circuit are conducted, the power current sequentially flows through the light emitting diodes 100, the one-way conduction device 200 and the current limiting resistor 400 and then is transmitted to the output circuit 300, the voltage is also reduced after the current limiting resistor 400 loses part of the current, the reduced voltage is transmitted to the output circuit 300, the output circuit 300 outputs signals, and the damage caused by overlarge input voltage of the output circuit 300 is favorably reduced. When the led 100 is partially turned on, the voltage flowing through the current limiting resistor 400 on the branch where the led 100 is turned on will act on the branch where the led 100 is not turned on, because the led 100 is a non-linear device, considering the influence of the resistance and the threshold voltage of the led 100, the led 100 can be equivalently connected in parallel with a resistor and a capacitor and then connected in series with a resistor, if there is no unidirectional conducting device 200, the action of the reverse voltage will make the diode flow a little current, causing a slightly bright condition, especially in a dark indoor environment, the slightly bright condition of the led 100 is obvious, possibly making the user make an incorrect judgment on the displayed information, and after the unidirectional conducting device 200 is added on the branch where the led 100 is located, the leakage current of the led 100 that is turned on cannot influence the light emitting state of the led 100 that is not turned on, the information displayed by the light emitting diode 100 is more accurate, and the working reliability of the nixie tube display circuit is improved.
In one embodiment, referring to fig. 2, the nixie tube display circuit further includes a power supply control circuit 500, the power supply control circuit 500 is connected to the anode of the light emitting diode 100, and the power supply control circuit 500 is used for connecting to a power supply. Specifically, the power supply control circuit 500 is used to control whether the anode of the led 100 is powered on, and the power supply control circuit 500 controls the power on condition of the led 100, so as to improve the automation degree of the nixie tube display circuit. The specific structure of the power supply control circuit 500 is not unique, and may include a switch, for example, one end of the switch is connected to the power supply, the other end of the switch is connected to the anode of the light emitting diode 100, the anode of the light emitting diode 100 may be connected to the power supply when the switch is turned on, the anode of the light emitting diode 100 cannot be connected to the power supply when the switch is turned off, the light emitting diode 100 is in a non-conducting state, and whether the light emitting diode 100 is connected to the power supply is further controlled by controlling the on.
In one embodiment, referring to fig. 3, the number of the power supply control circuits 500 is more than two, and each power supply control circuit 500 is connected to the anodes of two or more corresponding light emitting diodes 100. The two power supply control circuits 500 are adopted to control the conduction states of different light emitting diodes 100, so that the working efficiency can be improved, and the mutual influence of a plurality of light emitting diodes 100 when the light emitting diodes are connected to the same current can be reduced, thereby improving the working performance of the nixie tube display circuit.
Specifically, for example, the number of the power supply control circuits 500 is two, and each power supply control circuit 500 is connected to the anodes of two corresponding light emitting diodes 100, the number of the light emitting diodes 100 is four, and each power supply control circuit 500 controls the conduction states of the two light emitting diodes 100, wherein the two light emitting diodes 100 connected to the same power supply control circuit 500 may be connected to the same main circuit in the power supply control circuit 500, and at this time, the conduction states of the two light emitting diodes 100 are the same, which is beneficial to simplifying the control flow of the power supply control circuit 500, or the two light emitting diodes 100 connected to the same power supply control circuit 500 may be respectively connected to different branches in the same power supply control circuit 500, and at this time, the conduction states of the two light emitting diodes 100 are different, and the information displayed by the nixi. It is understood that in other embodiments, the number of the power supply control circuits 500 may be other values, and each power supply control circuit 500 may be connected with more leds 100, so as to improve the working efficiency, as long as the skilled person can realize the purpose.
In one embodiment, the power supply control circuit 500 includes a switch tube and a voltage drop resistor, one end of the voltage drop resistor is used for receiving a level signal, the other end of the voltage drop resistor is connected to a control end of the switch tube, an input end of the switch tube is used for receiving a power supply, and an output end of the switch tube is connected to the anode of the light emitting diode 100. According to different accessed level signals, the conduction conditions of the switch tubes are different, so that whether the anode of the light-emitting diode 100 is connected with a power supply or not can be controlled, and the use is convenient.
Specifically, the type of the switching tube is not unique, taking the switching tube as an example, the base of the triode is used as the control end of the switching tube and is connected with a voltage drop resistor, the emitter of the triode is used for connecting a power supply, the collector of the triode is connected with the anode of the light emitting diode 100, and the level signal is transmitted to the base of the triode through the voltage drop resistor to protect the triode and prolong the service life of the triode. When the level signal accessed by the voltage drop resistor is a low level signal, the voltage of the emitting electrode of the triode is greater than the base voltage, the triode is conducted, the current flows through the light emitting diode 100 at the moment, the light emitting diode 100 is conducted and lightened, when the level signal accessed by the voltage drop resistor is a high level signal, the voltage of the emitting electrode of the triode is less than the base voltage, the triode is cut off, the current cannot flow through the light emitting diode 100 at the moment, the light emitting diode 100 is not conducted and is in a turned-off state, the conduction condition of the switch tube is different according to different accessed level signals, and therefore whether the anode of the light emitting diode 100 is connected with a power supply or. It is understood that in other embodiments, the power supply control circuit 500 may have other structures as long as those skilled in the art can realize the above.
In one embodiment, the nixie tube display circuit further comprises a signal source generating circuit, and the signal source generating circuit is connected with the control end of the switching tube through the voltage drop resistor. The signal source generating circuit is used for sending different level signals to the voltage drop resistor and further transmitting the level signals to the switching tube, so that the conduction state of the switching tube is controlled, and intelligent control over the switching tube is achieved.
Specifically, the structure of the signal source generating circuit is not unique, and may be, for example, a main control chip, where the main control chip outputs different level signals to the voltage drop resistor through an output pin, controls the on state of the switching tube, and takes the main control chip outputting a rectangular wave to the voltage drop resistor as an example, where the rectangular wave voltage includes a high level and a low level, and the duration time of the switching tube when the switching tube is turned on or turned off may be controlled by adjusting the duration time of the high and low levels, so as to control the light emitting state of the light emitting diode 100, and implement intelligent control. It is understood that in other embodiments, the signal source generating circuit may have other structures, as long as the implementation is considered by those skilled in the art.
In one embodiment, referring to fig. 2, the nixie tube display circuit further includes a filter circuit 600, the anode of the light emitting diode 100 is grounded through the filter circuit 600, and the filter circuit 600 is further connected to the power supply control circuit 500. The filter circuit 600 can reduce the ac component in the pulsating dc voltage, and retain the dc component thereof, so that the ripple factor of the output voltage is reduced, and the waveform becomes smoother, thereby obtaining a dc current with a straight waveform, and improving the operating performance of the light emitting diode 100.
Specifically, the structure of the filter circuit 600 is not unique, and in this embodiment, the filter circuit 600 includes a filter capacitor and a filter resistor, the filter capacitor and the filter resistor are connected in parallel, one end of the filter capacitor and the filter resistor are connected in parallel, the anode of the light emitting diode 100 is connected to one end of the filter capacitor, and the other end of the filter capacitor and the anode of the light emitting diode are grounded, so that the structure is simple and easy to implement. It is understood that in other embodiments, the filter circuit 600 may have other structures, as long as the implementation is considered by those skilled in the art.
Specifically, taking the example that the number of the power supply control circuits 500 is two, and each power supply control circuit 500 is connected to the anodes of two corresponding light emitting diodes 100, two light emitting diodes 100 are connected to the same filter circuit 600. The filter circuit 600 comprises a filter capacitor C3 and a filter resistor R19, wherein one end of the filter capacitor C3, which is connected in parallel with the filter resistor R19, is connected with the anodes of the diode D5 and the diode D6, and is connected with the output end of the switch tube Q6, and the other end of the filter capacitor C3, which is connected in parallel with the filter resistor R19, is grounded.
In one embodiment, referring to fig. 3, the output circuit 300 includes a voltage dividing resistor component 310 and a zener triode component 320, the output terminal of the unidirectional device 200 is connected to the control terminal of the zener triode component 320 through the voltage dividing resistor component 310, the first terminal of the zener triode component 320 is grounded, and the second terminal of the zener triode component 320 is used for outputting signals. The voltage divider resistor assembly 310 can reduce the voltage input to the voltage regulator triode assembly 320, thereby providing protection for the voltage regulator triode assembly, and the voltage regulator triode assembly 320 can stabilize the output signal, thereby improving the working performance of the nixie tube display circuit. Specifically, the structure of the voltage-dividing resistor component 310 is not unique, and for example, the structure may be two resistors connected in series, the specific resistance value of the resistor may be adjusted according to actual requirements, the use of the two resistors may increase the adjustment range of the resistor, and the structure is simple and the use cost is low. It is understood that in other embodiments, the voltage dividing resistor component 310 may have other structures, such as an adjustable resistor, etc., as long as the implementation is considered by those skilled in the art.
Further, in one embodiment, the zener diode assembly 320 includes a first zener diode, a second zener diode, a first divider resistor, and a second divider resistor, wherein a base of the first zener diode serves as a control terminal of the zener diode assembly 320, a base of the first zener diode is connected to an emitter of the first zener diode through the first divider resistor, an emitter of the first zener diode is connected to a base of the second zener diode, a base of the second zener diode is connected to an emitter of the second zener diode through the second divider resistor, a common connection end of the emitter of the second zener diode and the second divider resistor serves as a first terminal of the zener diode assembly 320, and a common connection end of a collector of the first zener diode and a collector of the second zener diode serves as a second terminal of the zener diode assembly 320. When the light emitting diode 100 is turned on, the current passes through the voltage dividing resistor component 310 and then reaches the first voltage-stabilizing triode, because the tube voltage drop of the base electrode and the emitter electrode of the first voltage-stabilizing triode is the voltage at both ends of the first voltage-stabilizing resistor, and the value of the voltage is larger than the conduction voltage drop of the first voltage-stabilizing triode, the first voltage-stabilizing triode is turned on, and similarly, the second voltage-stabilizing triode is also turned on, and the output signal is a low level signal. It is understood that in other embodiments, the zener transistor component 320 may have other structures as long as those skilled in the art can realize the voltage regulation.
In one embodiment, the unidirectional conducting device 200 is a triode. Specifically, the base of the transistor is grounded, the emitter of the transistor is connected to the cathode of the light emitting diode 100, and the collector of the transistor is connected to the output circuit 300. The number of the light emitting diodes 100 is more than two, the number of the triodes is equal to the number of the light emitting diodes 100, the nixie tube display circuit comprises current limiting resistors 400, the number of the current limiting resistors 400 is equal to the number of the triodes, for example, an emitting electrode of each triode is connected with a cathode of the corresponding light emitting diode 100, a collecting electrode of each triode is connected with the output circuit 300 through the corresponding current limiting resistor 400, when the nixie tube display circuit bears reverse voltage, certain voltage to ground exists in the collecting electrode of each triode, the tube voltage of a base electrode and the emitting electrode of each triode is reduced to 0, the light emitting diode 100 is in a turn-off state, no current exists, and the light emitting diode 100 cannot be lightened, so that the condition that the light emitting.
For a better understanding of the above embodiments, the following detailed description is given in conjunction with a specific embodiment. In an embodiment, referring to fig. 3, the signal source generating circuit is a main chip, the power supply control circuit 500 includes a switch Q6 and a voltage drop resistor R17, the power supply control circuit 500 may also include a switch Q5 and a voltage drop resistor R18, the filter circuit 600 includes a resistor R19 and a capacitor C3, the filter circuit 600 may also include a resistor R20 and a capacitor C4, the light emitting diode 100 includes light emitting diodes D5, D6, D7, or D8, the current limiting resistor 400 includes resistors R21, R22, R23, or R24, the voltage dividing resistor assembly 310 includes resistors R25 and R31, and the zener triode assembly 320 includes a triode Q15, a triode Q7, a resistor R27, and a resistor R28.
The LED1 in the circuit is connected with a main chip pin through the LED2, a rectangular wave sent by the main chip controls an input signal, when the input is low level, the voltage of an emitter of a triode (Q5 and Q6) is larger than the base voltage, the triode is conducted, at the moment, current flows through a light-emitting diode (D5, D6, D7 and D8), the light-emitting diode is conducted, and a display lamp is lightened. The current reaches the triode Q7 after passing through the resistors (R25 and R31), and because the tube voltage of the base electrode and the emitter electrode of the Q7 is the voltage at two ends of the R27, the value is larger than the conduction voltage drop of the triode, the Q7 is conducted, and similarly, the triode Q15 is conducted, and the output is low level.
A triode (Q13, Q3, Q4 and Q8) is respectively connected in series behind the diodes (D5, D6, D7 and D8), the base electrodes of the triodes are grounded, the emitter electrodes of the triodes are connected with the cathode electrodes of the diodes, and the collector electrodes of the triodes are connected with one end of a resistor. When the LED1 is turned off and the LED2 is turned on, the voltages flowing through R23 and R24 will act on the transistor Q13 and the transistor Q3 in reverse, and when the LED2 is turned off and the LED1 is turned on, the voltages flowing through R21 and R22 will act on the transistor Q4 and the transistor Q8 in reverse, and when the reverse voltage is applied, that is, when the collector of the transistor (Q13, Q3, Q4, Q8) has a certain ground voltage, the transistor between the base and the emitter of the transistor is reduced to 0, and the transistor is in an off state, and the diode has no current and cannot be lit, so that the situation that the diode is slightly lit is not generated.
In the nixie tube display circuit, the anode of the light-emitting diode is used for connecting a power supply, the cathode of the light-emitting diode is connected with the input end of the one-way conduction device, the output end of the one-way conduction device is connected with the output circuit, since the unidirectional conducting device limits the current flow to be transmitted from the input terminal to the output terminal, when the light emitting diode is conducted, the current flows in from the anode of the light-emitting diode, flows out from the cathode of the light-emitting diode, and then is transmitted to the output circuit through the input end and the output end of the one-way conduction device in sequence, because of the one-way current blocking property of the one-way conduction device, the current can not reach the input end from the output end of the one-way conduction device, therefore, the cathode of the light-emitting diode can not be reached, no current flows through the light-emitting diode, and the light-emitting diode keeps in an off state, so that the information displayed by the nixie tube is more accurate, and the use reliability of the nixie tube is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. The nixie tube display circuit is characterized by comprising a light emitting diode, a one-way conduction device and an output circuit, wherein the anode of the light emitting diode is used for being connected with a power supply, the input end of the one-way conduction device is connected with the cathode of the light emitting diode, the output end of the one-way conduction device is connected with the output circuit, and the one-way conduction device is used for limiting the current flowing direction to be transmitted from the input end to the output end.
2. The circuit of claim 1, wherein the number of the light emitting diodes is two or more, the number of the unidirectional conducting devices is equal to the number of the light emitting diodes, and an input end of each unidirectional conducting device is connected to a cathode of the corresponding light emitting diode.
3. The circuit of claim 2, further comprising current limiting resistors, wherein the number of the current limiting resistors is equal to the number of the unidirectional devices, and an output terminal of each unidirectional device is connected to the output circuit through a corresponding current limiting resistor.
4. The circuit of claim 1, further comprising a power control circuit, wherein the power control circuit is connected to the anode of the light emitting diode, and the power control circuit is configured to be connected to a power source.
5. The circuit of claim 4, wherein the number of the power supply control circuits is two or more, and each power supply control circuit is connected to the anodes of two or more corresponding light emitting diodes.
6. The circuit of claim 4, wherein the power supply control circuit comprises a switching tube and a voltage drop resistor, one end of the voltage drop resistor is used for receiving a level signal, the other end of the voltage drop resistor is connected to the control end of the switching tube, the input end of the switching tube is used for receiving a power supply, and the output end of the switching tube is connected to the anode of the light emitting diode.
7. The circuit of claim 6, further comprising a signal source generating circuit, wherein the signal source generating circuit is connected to the control terminal of the switching tube through the voltage drop resistor.
8. The circuit of claim 1, further comprising a filter circuit through which the anode of the light emitting diode is grounded.
9. The circuit of claim 1, wherein the output circuit comprises a voltage dividing resistor assembly and a voltage stabilizing triode assembly, the output terminal of the unidirectional conducting device is connected to the control terminal of the voltage stabilizing triode assembly through the voltage dividing resistor assembly, the first terminal of the voltage stabilizing triode assembly is grounded, and the second terminal of the voltage stabilizing triode assembly is used for outputting signals.
10. The circuit of claim 9, wherein the regulation transistor assembly comprises a first regulation transistor, a second regulation transistor, a first voltage divider resistor, and a second voltage divider resistor, the base electrode of the first voltage-stabilizing triode is used as the control end of the voltage-stabilizing triode component, the base electrode of the first voltage-stabilizing triode is connected with the emitting electrode of the first voltage-stabilizing triode through the first divider resistor, the emitter of the first voltage-stabilizing triode is connected with the base of the second voltage-stabilizing triode, the base of the second voltage-stabilizing triode is connected with the emitter of the second voltage-stabilizing triode through the second divider resistor, the common connection end of the emitter electrode of the second voltage-stabilizing triode and the second divider resistor is used as the first end of the voltage-stabilizing triode component, and the common connection end of the collector electrode of the first voltage-stabilizing triode and the collector electrode of the second voltage-stabilizing triode is used as the second end of the voltage-stabilizing triode component.
11. A circuit according to any of claims 1 to 10, wherein the unidirectional conducting device is a triode.
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| CN201911031581.4A CN110648619A (en) | 2019-10-28 | 2019-10-28 | Nixie tube display circuit |
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| CN201911031581.4A CN110648619A (en) | 2019-10-28 | 2019-10-28 | Nixie tube display circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111653230A (en) * | 2020-07-29 | 2020-09-11 | 上海天马微电子有限公司 | Light-emitting panel and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111653230A (en) * | 2020-07-29 | 2020-09-11 | 上海天马微电子有限公司 | Light-emitting panel and display device |
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