CN113573435A - Indicator lamp display circuit, indicator lamp and electronic equipment - Google Patents
Indicator lamp display circuit, indicator lamp and electronic equipment Download PDFInfo
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
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Abstract
The invention discloses an indicator light display circuit, an indicator light and electronic equipment. The indicator light display circuit includes: the pulse adjustable display device comprises a pulse adjustable output circuit, a shaping circuit and a driving display circuit, wherein the first end of the shaping circuit is connected with the pulse adjustable output circuit, and the second end of the shaping circuit is connected with the driving display circuit; the pulse waveform generated by self-oscillation is output to a shaping circuit through a pulse adjustable output circuit; the shaping circuit carries out waveform adjustment on the pulse waveform to obtain an exponentially-changed waveform; the driving display circuit drives the indicator lamp to display according to the exponentially changing waveform. Because the pulse waveform is output to the shaping circuit through the pulse adjustable output circuit and is processed by the shaping circuit to obtain the exponentially-changed waveform, the indicator lamp in the driving display circuit can realize slow on and slow off according to the exponentially-changed waveform, and the display device is different from the traditional direct on and direct off expression form, can effectively enhance the user impression and improve the user experience.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to an indicator lamp display circuit, an indicator lamp and electronic equipment.
Background
At present, most of electronic devices are provided with indicator lights for indicating the working state of the device, for example, the indicator lights are used for indicating the normal working state and the fault state of the electronic device, or the indicator lights are used for indicating the working voltage or the current of the electronic device, and the like.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide an indicator light display circuit, an indicator light and electronic equipment, and aims to solve the technical problems that in the prior art, the appearance of a user is not strong and the user experience is not good due to the display form that the indicator light is directly on and directly off.
To achieve the above object, the present invention provides an indicator light display circuit, including: the pulse adjustable display device comprises a pulse adjustable output circuit, a shaping circuit and a driving display circuit, wherein a first end of the shaping circuit is connected with the pulse adjustable output circuit, and a second end of the shaping circuit is connected with the driving display circuit;
the pulse adjustable output circuit is used for outputting a pulse waveform generated by self-oscillation to the shaping circuit;
the shaping circuit is used for carrying out waveform adjustment on the pulse waveform to obtain an exponentially-changed waveform;
and the driving display circuit is used for driving the indicator lamp to display according to the exponentially changing waveform.
Optionally, the pulse adjustable output circuit comprises: the pulse shaping circuit comprises a pulse generating circuit, a level reversing circuit and a pulse output circuit, wherein a first end of the level reversing circuit is connected with the pulse generating circuit, a second end of the level reversing circuit is connected with the pulse output circuit, and a second end of the pulse output circuit is connected with the shaping circuit;
the pulse generating circuit is used for carrying out multi-stage voltage division on the power supply voltage signal to obtain a first voltage division signal and a second voltage division signal;
the pulse generating circuit is further configured to compare the charging and discharging voltage signal with the first voltage division signal and the second voltage division signal respectively to obtain a first level signal and a second level signal;
the level inversion circuit is used for carrying out signal inversion according to the first level signal and the second level signal to obtain an inverted level signal;
and the pulse output circuit is used for generating a pulse waveform according to the inversion level signal and transmitting the pulse waveform to the shaping circuit.
Optionally, the pulse generating circuit comprises: the charge-discharge circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first comparator, a second comparator and a charge-discharge module;
the first end of the first resistor is grounded, the second end of the first resistor is connected with the first end of the third resistor through the second resistor, and the second end of the third resistor is externally connected with a power supply;
the first end of the fourth resistor is externally connected with a power supply, the second end of the fourth resistor is connected with the charge and discharge module through the fifth resistor, the charge and discharge module is further connected with the reverse-phase pin of the first comparator, the in-phase pin of the first comparator is connected with the second end of the first resistor, the output end of the first comparator is connected with the level inversion circuit, the in-phase pin of the second comparator is connected with the charge and discharge module, and the reverse-phase pin of the second comparator is connected with the first end of the third resistor.
Optionally, the pulse generating circuit further comprises: a third capacitor;
and the first end of the third capacitor is connected with the inverting pin of the second comparator, and the second end of the third capacitor is grounded.
Optionally, the charge and discharge module includes: a first capacitor and a second capacitor;
the first end of the first capacitor is connected with the second end of the fifth resistor, the second end of the first capacitor is grounded, and the second capacitor is connected with the first capacitor in parallel.
Optionally, the pulse generating circuit further comprises: a first triode;
a collector of the first triode is connected with a first end of the fifth resistor, an emitter of the first triode is grounded, and a base of the first triode is connected with an output end of the level inversion circuit;
the first triode is used for disconnecting a path between a collector and an emitter of the first triode when the first comparator outputs a high-level signal;
the first triode is also used for conducting a path between a collector and an emitter of the first triode when the second comparator outputs a high-level signal.
Optionally, the shaping circuit comprises: the first diode, the sixth resistor, the seventh resistor and the fourth capacitor;
the first end of the first diode is connected with the second end of the pulse output circuit, the second end of the first diode is connected with the first end of the sixth resistor, the second end of the sixth resistor is connected with the first end of the seventh resistor, the second end of the seventh resistor is grounded, and the fourth capacitor is connected with the seventh resistor in parallel.
Optionally, the driving display circuit includes: the second triode, the eighth resistor, the light emitting diode and the power supply;
the collector of second triode is connected the positive pole of power, the negative pole ground connection of power, the projecting pole of second triode with the first end of eighth resistance is connected, the base of second triode with the second end of sixth resistance is connected, the second end of eighth resistance with emitting diode's first end is connected, emitting diode's second end ground connection.
In addition, in order to achieve the above object, the present invention also provides an indicator light including the indicator light display circuit as described above.
In addition, in order to achieve the above object, the present invention also provides an electronic device including the indicator lamp as described above.
The invention provides an indicator light display circuit, which comprises: the pulse adjustable display device comprises a pulse adjustable output circuit, a shaping circuit and a driving display circuit, wherein a first end of the shaping circuit is connected with the pulse adjustable output circuit, and a second end of the shaping circuit is connected with the driving display circuit; the pulse adjustable output circuit is used for outputting a pulse waveform generated by self-oscillation to the shaping circuit; the shaping circuit is used for carrying out waveform adjustment on the pulse waveform to obtain an exponentially-changed waveform; and the driving display circuit is used for driving the indicator lamp to display according to the exponentially changing waveform. The invention generates pulse waveform by controlling the pulse adjustable output circuit, further outputs the pulse waveform to the shaping circuit, obtains exponentially-changed waveform by shaping adjustment of the shaping circuit, and further controls and drives the indicator lamp in the display circuit to display by the exponentially-changed waveform. Because the waveform obtained by the shaping circuit is changed exponentially, the indicator lamp is gradually turned on and off. Different from the traditional direct-on and direct-off expression form, the circuit provided by the invention enables the indicator lamp to have the display effect of the breathing lamp effect, enhances the impression of a user, and improves the use experience of the user.
Drawings
FIG. 1 is a schematic circuit diagram of a first embodiment of an indicator light display circuit according to the present invention;
FIG. 2 is a schematic circuit diagram of a first embodiment of an indicator light display circuit according to the present invention;
fig. 3 is a circuit connection diagram of a second embodiment of the indicator light display circuit of the invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Pulse |
20 | |
| 30 | Driving a display circuit | COMP1 | |
| 101 | |
102 | |
| 103 | |
104 | Charging-discharging module |
| COMP2 | Second comparator | C1～C4 | First to fourth capacitors |
| R1～R8 | First to eighth resistors | Q1～Q2 | First to second triodes |
| D1 | First diode | D2 | Light emitting diode |
| VCC | Supply voltage | V13 | Power supply |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should be considered to be absent and not within the protection scope of the present invention.
Referring to fig. 1 and 2, fig. 1 is a schematic circuit diagram of an indicator light display circuit according to a first embodiment of the present invention, and fig. 2 is a schematic circuit connection diagram of the indicator light display circuit according to the first embodiment of the present invention.
As shown in fig. 1, in the present embodiment, the indicator light display circuit includes: the pulse-adjustable display device comprises a pulse-adjustable output circuit 10, a shaping circuit 20 and a driving display circuit 30, wherein a first end of the shaping circuit 20 is connected with the pulse-adjustable output circuit 10, and a second end of the shaping circuit 20 is connected with the driving display circuit 30.
In practical implementation, the pulse-width modulation output circuit 10 needs to generate a pulse waveform, specifically a square waveform, and needs to output the generated square waveform to the shaping circuit 20.
The pulse adjustable output circuit 10 is used for outputting a pulse waveform generated by self-oscillation to the shaping circuit 20.
It is easy to understand that the self-excited oscillation refers to the constant and continuous oscillation generated by itself without adding exciting signal, and the self-excited oscillation mode can simplify the circuit and make the operation simpler. In a specific implementation, the width of the generated pulse waveform can be controlled by adjusting the value of the relevant element in the self-oscillation circuit.
The shaping circuit 20 is configured to perform waveform adjustment on the pulse waveform to obtain an exponentially changing waveform.
It should be noted that, since the pulse waveform outputted by the pulse-adjustable output circuit 10 is a square waveform, but the square waveform can only control the indicator light to be turned on and off directly, in order to achieve the purpose of gradually turning on and off the indicator light, the shaping circuit 20 is introduced to adjust the square waveform to obtain an exponentially changing waveform, so as to further enable the indicator light to be turned on and off slowly.
The driving display circuit 30 is configured to drive the indicator light to display according to the exponentially changing waveform.
In a specific implementation, the pulse-tunable output circuit 10 includes: a pulse generating circuit 101, a level inverting circuit 103, and a pulse output circuit 102, wherein a first end of the level inverting circuit 103 is connected to the pulse generating circuit 101, a second end of the level inverting circuit 103 is connected to the pulse output circuit 102, and a second end of the pulse output circuit 102 is connected to the shaping circuit 20.
The pulse generating circuit 101 is configured to perform multi-stage voltage division on a power supply voltage signal to obtain a first voltage division signal and a second voltage division signal.
The pulse generating circuit is further configured to compare the charging and discharging voltage signal with the first voltage division signal and the second voltage division signal, respectively, to obtain a first level signal and a second level signal.
The pulse generating circuit includes: the charging and discharging circuit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first comparator COMP1, a second comparator COMP2 and a charging and discharging module 104.
It should be noted that the charge/discharge module 104 can be understood as a conversion module having a charge/discharge function, and the charge/discharge module 104 can implement buffer control on the power supply voltage, so as to achieve the purpose of slowly changing the voltage of the electric device.
The first end of the first resistor R1 is grounded, the second end of the first resistor R1 is connected with the first end of the third resistor R3 through the second resistor R2, and the second end of the third resistor R3 is externally connected with a power supply.
A first end of the fourth resistor R4 is externally connected to a power supply, a second end of the fourth resistor R4 is connected to the charge and discharge module 104 through the fifth resistor R5, the charge and discharge module 104 is further connected to an inverting pin of the first comparator COMP1, an in-phase pin of the first comparator COMP1 is connected to a second end of the first resistor R1, an output end of the first comparator COMP1 is connected to the level inversion circuit 103, an in-phase pin of the second comparator COMP2 is connected to the charge and discharge module 104, and an inverting pin of the second comparator COMP2 is connected to a first end of the third resistor R3.
It should be noted that, referring to fig. 2, the first resistor R1, the second resistor R2 and the third resistor R3 are connected in series, the first end of the first resistor R1 is grounded, the in-phase pin of the first comparator COMP1 is connected to the second end of the first resistor R1, the inverting pin of the second comparator COMP2 is connected to the first end of the third resistor R3, and the above connection relationship constitutes a voltage divider circuit, therefore, under the condition of this circuit connection, the magnitude of the voltage of the in-phase pin of the first comparator COMP1 and the magnitude of the voltage of the inverting pin of the second comparator COMP2 can be determined by adjusting the magnitudes of the values of the first resistor R1, the second resistor R2 and the third resistor R3, if the resistances of the three resistors connected in series are the same, the voltage of the in-phase pin of the first comparator COMP1 is 1/3, the voltage of the inverting pin of the second comparator COMP 638 is 2/3, and the voltage of the in-phase pin of the in-phase comparator COMP1 is connected to the charge-discharge module 104, therefore, the voltage changes of the two pins are the same at the time t, and the specific voltage value is determined by the charge-discharge module.
In a specific implementation, the pulse generating circuit 101 further includes: a third capacitor C3.
A first end of the third capacitor C3 is connected to the inverting pin of the second comparator COMP2, and a second end of the third capacitor C3 is grounded.
It is easy to understand that filtering can be realized through the third capacitor C3, so that the inverting pin voltage of the second comparator COMP2 is more stable.
The charge and discharge module 104 includes: a first capacitor C1 and a second capacitor C2.
A first end of the first capacitor C1 is connected to an inverting pin of the first comparator COMP1, a second end of the first capacitor C1 is grounded, and the second capacitor C2 is connected in parallel to the first capacitor C1.
It should be noted that the first capacitor C1 and the second capacitor C2 may be understood as a buffer power source, and the fourth resistor R4, the fifth resistor R5, the first capacitor C1, the second capacitor C2, the first comparator COMP1, and the second comparator COMP2 form a self-oscillation circuit, wherein the fourth resistor R4, the fifth resistor R5, the first capacitor C1, and the second capacitor C2 determine the width of the output square wave at high and low levels. According to the charging and discharging principle of the RC circuit, the values of the fourth resistor R4, the fifth resistor R5, the first capacitor C1 and the second capacitor C2 determine the charging and discharging constant, and thus the width of the output square wave is affected. Therefore, in specific implementation, the width of the output waveform can be adjusted by changing the values of the fourth resistor R4, the fifth resistor R5, the first capacitor C1 and the second capacitor C2.
The level inversion circuit 103 is configured to perform signal inversion according to the first level signal and the second level signal to obtain an inverted level signal.
It should be noted that the signal inversion is understood as a process of converting the current pulse signal, and in the present embodiment, when the level inversion circuit receives the high level signal, the current pulse signal is inverted. For example, if the first resistor, the second resistor and the third resistor have the same resistance, when t is equal to 0, the first comparator outputs a high level signal because the non-inverting leg voltage 1/3VCC is greater than the inverting leg voltage. The second comparator outputs a low level signal because the non-inverting leg voltage is lower than the inverting leg voltage 2/3VCC, and the level signal does not exist until t becomes 0, that is, the current pulse signal does not exist, so that the level inversion circuit does not need to perform level inversion even if the level inversion circuit receives a high level signal, and the pulse output circuit outputs a high level signal. In one embodiment, the level inversion circuit may be an IC chip with a control function.
The pulse output circuit 102 is configured to generate a pulse waveform according to the inverted level signal, and transmit the pulse waveform to the shaping circuit 20.
In a specific implementation, the pulse generating circuit 101 further includes: a first transistor Q1.
The collector of the first transistor Q1 is connected to the first end of the fifth resistor R5, the emitter of the first transistor Q1 is grounded, and the base of the first transistor Q1 is connected to the output terminal of the level inversion circuit 103.
The first transistor Q1 is configured to disconnect a path between a collector and an emitter of the first transistor Q1 when the first comparator COMP1 outputs a high-level signal.
The first transistor Q1 is further configured to conduct a path between a collector and an emitter of the first transistor Q1 when the second comparator COMP2 outputs a high level signal.
It should be noted that, when the first transistor Q1 is turned on, the charge-discharge module 104, the fifth resistor R5 and the first transistor Q1 form a loop, so that the charge-discharge module 104 discharges. When the first transistor Q1 is turned off, the first transistor Q1 is equivalent to an open circuit, and the charging and discharging module 104, the fifth resistor R5 and the first transistor Q1 cannot form a loop, so that VCC charges the charging and discharging module 104.
For the sake of understanding, the circuit principle of the present embodiment will be specifically described by way of example with reference to fig. 2.
Referring to fig. 2, taking the resistance values of the first resistor R1, the second resistor R2 and the third resistor R3 as an example, when the voltage of the same phase leg of the first comparator COMP1 is 1/3VCC and the voltage of the opposite phase leg of the second comparator COMP2 is 2/3VCC, when the time is 0-1/3 VCC (the voltage value does not include 1/3VCC), the first comparator COMP1 outputs a high level, the second comparator COMP2 outputs a low level, and since there is no pulse waveform before again, even if the first comparator COMP1 outputs a high level, the level inversion circuit 103 does not need to invert, so the pulse output circuit 102 outputs a high level, and at this time, since the level inversion circuit 103 receives the high level signal of the first comparator COMP1, the first transistor Q1 is controlled to be turned off, when the time is 1/3 VCC-2/3 VCC (the voltage value does not include 2/3VCC), the voltage of the inverting pin of the first comparator COMP1 is greater than the voltage of the non-inverting pin, a low level signal is output, the second comparator COMP2 still outputs a low level signal, the level inversion circuit 103 does not receive a high level signal and does not invert, the pulse signal keeps the current signal state, the pulse output circuit outputs a high level signal, the first triode Q1 is still not turned on, when the voltage value output by the charge-discharge module 104 reaches 2/3VCC, the second comparator COMP2 outputs a high level signal, the level inversion circuit 103 receives a high level signal to invert the current pulse waveform, the pulse output circuit 102 outputs a low level signal, and since the level inversion circuit 103 receives the high level signal of the second comparator COMP2, the first triode Q1 is turned on, the charge-discharge module 104 discharges through the fifth resistor R5 and the first triode Q1, so that the voltage reaching 2/3VCC begins to drop, when the voltage of the charge-discharge module 104 is lower than 1/3VCC, the first triode Q1 is turned off, the charge-discharge module 104 starts to charge, and the next cycle is entered, so that a square waveform is formed. Further, the square waveform is output to the shaping circuit 103 to obtain an exponentially changing waveform, and the indicator light in the driving display circuit 30 is controlled to gradually turn on and off according to the exponentially changing waveform, so that the purpose of having the breathing light effect display effect is achieved.
In a first embodiment, the indicator light display circuit includes: the pulse adjustable display device comprises a pulse adjustable output circuit, a shaping circuit and a driving display circuit, wherein a first end of the shaping circuit is connected with the pulse adjustable output circuit, and a second end of the shaping circuit is connected with the driving display circuit; the pulse adjustable output circuit is used for outputting a pulse waveform generated by self-oscillation to the shaping circuit; the shaping circuit is used for carrying out waveform adjustment on the pulse waveform to obtain an exponentially-changed waveform; and the driving display circuit is used for driving the indicator lamp to display according to the exponentially changing waveform. In this embodiment, a voltage dividing circuit in the pulse adjustable output circuit generates a first voltage dividing signal and a second voltage dividing signal, and compares the first voltage dividing signal and the second voltage dividing signal with a charge-discharge voltage signal of the charge-discharge module, respectively, to obtain a first level signal and a second level signal, and further outputs the first level signal and the second level signal to a level inversion circuit for level inversion, so as to obtain a pulse waveform.
Referring to fig. 3, fig. 3 is a circuit connection diagram of a second embodiment of the indicator light display circuit of the present invention. Based on the first embodiment described above, a second embodiment of the indicator light display circuit is proposed.
In a second embodiment, the shaping circuit 20 comprises: a first diode D1, a sixth resistor R6, a seventh resistor R7, and a fourth capacitor C4.
A first end of the first diode D1 is connected to an output end of the pulse output circuit 102, a second end of the first diode D1 is connected to a first end of the sixth resistor R6, a second end of the sixth resistor R6 is connected to a first end of the seventh resistor R7, a second end of the seventh resistor R7 is grounded, and the fourth capacitor C4 is connected to the seventh resistor R7 in parallel.
It should be noted that, the sixth resistor R6 and the fourth capacitor C4 form an RC charging circuit, and since the pulse output circuit outputs a square waveform, the current of the square waveform charges the fourth capacitor C4 through the sixth resistor R6, and since the voltage of the fourth capacitor C4 changes slowly and the charging current waveform conforms to the exponential change rule, the output current waveform also changes exponentially.
The driving display circuit 30 includes: the LED driving circuit comprises a second triode Q2, an eighth resistor R8, a light emitting diode D2 and a power supply V13.
The collector of the second triode Q2 is connected with the positive electrode of the power supply V13, the negative electrode of the power supply V13 is grounded, the emitter of the second triode Q2 is connected with the first end of the eighth resistor R8, the base of the second triode Q2 is connected with the second end of the sixth resistor R6, the second end of the eighth resistor R8 is connected with the first end of the light emitting diode D2, and the second end of the light emitting diode D2 is grounded.
It should be noted that the sixth resistor R6 and the seventh resistor R7 form a base bias circuit of the second transistor Q2 to stabilize the static base current. Because the waveform obtained by the shaping circuit is changed exponentially, the change of the base current of the second triode can be influenced, the sixth resistor R6, the seventh resistor R7 and the fourth capacitor C4 determine the drive current of the base of the second triode Q2 and influence the base current waveform, so that the emitting electrode of the second triode Q2 outputs current according to the change of the base current, and the changed current can slowly lighten and extinguish the light-emitting diode D2 to achieve the display effect of the breathing lamp effect. The power supply V13, the second triode Q2 and the eighth resistor R8 provide current amplification effect to amplify the base driving current of the second triode Q2.
In a second embodiment, the process of converting the square waveform into the exponentially-changed waveform is realized through the RC charging circuit in the shaping circuit, the exponentially-changed waveform is further output to the driving display circuit, and the light emitting diode is controlled to be slowly turned on and slowly turned off.
To achieve the above object, the present invention also provides an indicator light including the indicator light display circuit as described above. Since the indicator light adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and are not repeated herein.
To achieve the above object, the present invention further provides an electronic device including the indicator light as described above. Since the electronic device adopts all the technical solutions, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and are not described in detail herein.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An indicator light display circuit, comprising: the pulse adjustable display device comprises a pulse adjustable output circuit, a shaping circuit and a driving display circuit, wherein a first end of the shaping circuit is connected with the pulse adjustable output circuit, and a second end of the shaping circuit is connected with the driving display circuit;
the pulse adjustable output circuit is used for outputting a pulse waveform generated by self-oscillation to the shaping circuit;
the shaping circuit is used for carrying out waveform adjustment on the pulse waveform to obtain an exponentially-changed waveform;
and the driving display circuit is used for driving the indicator lamp to display according to the exponentially changing waveform.
2. The indicator light display circuit of claim 1, wherein the pulse adjustable output circuit comprises: the pulse shaping circuit comprises a pulse generating circuit, a level reversing circuit and a pulse output circuit, wherein a first end of the level reversing circuit is connected with the pulse generating circuit, a second end of the level reversing circuit is connected with the pulse output circuit, and a second end of the pulse output circuit is connected with the shaping circuit;
the pulse generating circuit is used for carrying out multi-stage voltage division on the power supply voltage signal to obtain a first voltage division signal and a second voltage division signal;
the pulse generating circuit is further configured to compare the charging and discharging voltage signal with the first voltage division signal and the second voltage division signal respectively to obtain a first level signal and a second level signal;
the level inversion circuit is used for carrying out signal inversion according to the first level signal and the second level signal to obtain an inverted level signal;
and the pulse output circuit is used for generating a pulse waveform according to the inversion level signal and transmitting the pulse waveform to the shaping circuit.
3. The indicator light display circuit of claim 2, wherein the pulse generation circuit comprises: the charge-discharge circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first comparator, a second comparator and a charge-discharge module;
the first end of the first resistor is grounded, the second end of the first resistor is connected with the first end of the third resistor through the second resistor, and the second end of the third resistor is externally connected with a power supply;
the first end of the fourth resistor is externally connected with a power supply, the second end of the fourth resistor is connected with the charge and discharge module through the fifth resistor, the charge and discharge module is further connected with the reverse-phase pin of the first comparator, the in-phase pin of the first comparator is connected with the second end of the first resistor, the output end of the first comparator is connected with the level inversion circuit, the in-phase pin of the second comparator is connected with the charge and discharge module, and the reverse-phase pin of the second comparator is connected with the first end of the third resistor.
4. The indicator light display circuit of claim 3, wherein the pulse generation circuit further comprises: a third capacitor;
and the first end of the third capacitor is connected with the inverting pin of the second comparator, and the second end of the third capacitor is grounded.
5. The indicator light display circuit of claim 3, wherein the charge-discharge module comprises: a first capacitor and a second capacitor;
the first end of the first capacitor is connected with the second end of the fifth resistor, the second end of the first capacitor is grounded, and the second capacitor is connected with the first capacitor in parallel.
6. The indicator light display circuit of claim 3, wherein the pulse generation circuit further comprises: a first triode;
a collector of the first triode is connected with a first end of the fifth resistor, an emitter of the first triode is grounded, and a base of the first triode is connected with an output end of the level inversion circuit;
the first triode is used for disconnecting a path between a collector and an emitter of the first triode when the first comparator outputs a high-level signal;
the first triode is also used for conducting a path between a collector and an emitter of the first triode when the second comparator outputs a high-level signal.
7. The indicator light display circuit of claim 2, wherein the shaping circuit comprises: the first diode, the sixth resistor, the seventh resistor and the fourth capacitor;
the first end of the first diode is connected with the second end of the pulse output circuit, the second end of the first diode is connected with the first end of the sixth resistor, the second end of the sixth resistor is connected with the first end of the seventh resistor, the second end of the seventh resistor is grounded, and the fourth capacitor is connected with the seventh resistor in parallel.
8. The indicator light display circuit of claim 6, wherein the driving the display circuit comprises: the second triode, the eighth resistor, the light emitting diode and the power supply;
the collector of second triode is connected the positive pole of power, the negative pole ground connection of power, the projecting pole of second triode with the first end of eighth resistance is connected, the base of second triode with the second end of sixth resistance is connected, the second end of eighth resistance with emitting diode's first end is connected, emitting diode's second end ground connection.
9. An indicator light, characterized in that the indicator light comprises an indicator light display circuit according to any one of claims 1-8.
10. An electronic device characterized in that the indicator lamp electronic device with a breathing lamp effect comprises the indicator lamp of claim 9.
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Cited By (1)
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| CN115001058A (en) * | 2021-12-24 | 2022-09-02 | 荣耀终端有限公司 | Electronic device, power supply method, and computer storage medium |
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