Running water lamp control circuit

Abstract

The utility model provides a flowing water lamp control circuit. Each illuminating lamp is provided with a power supply loop, a digital logic unit and a trigger unit. A power supply controllable switch is arranged in the power supply loop, and the on-off state of the power supply controllable switch is controlled by the output end of the digital logic unit; when the voltage at the input end reaches the trigger threshold voltage, the digital logic unit keeps outputting a predetermined level signal to control the power supply controllable switch to be switched on; the trigger unit comprises a lighting capacitor, and voltage changing along with the charging process when the lighting capacitor is charged serves as an input end signal of the digital logic unit. And the charging speeds of the lighting capacitors are different. According to the scheme, the characteristic that the charging speeds of the capacitors are different and the digital logic unit keeps outputting the preset level signal in the state that the input end reaches the trigger threshold voltage is utilized to control the illuminating lamps to be lightened in a running water effect, a single chip microcomputer which is large in size and high in cost does not need to be used in the whole control circuit, and the cost is low. The overall miniaturization layout of the control circuit is facilitated, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of control technology, and in particular to a running light control circuit. Background Art

[0002] Flowing lights can be used to embellish homes and commercial spaces to create a unique atmosphere; they can also be used in parks, squares, street lights and public places to add night beauty and improve the city's image; they can also be used in stage performances to create cool and dynamic visual effects, enhance the atmosphere and fun of activities; they can be used as turn signals on the body of the vehicle, which can not only improve the appearance of the vehicle, but also increase people's attention to the vehicle's driving intentions (when flowing lights are used as vehicle turn signals, it can increase people's attention to the vehicle's turning intentions) and ensure driving safety.

[0003] Existing running lights are usually controlled by a single-chip microcomputer, that is, a single-chip microcomputer is used as the main control chip, a PCB board is designed for the peripheral circuit of the single-chip microcomputer, and the single-chip microcomputer and peripheral devices are arranged on the PCB board to form a controller of the running light.

[0004] In some scenarios, the space available for a running light controller is limited, or the cost of the running light must be kept low. Typically, a controller consisting of a microcontroller and peripheral components mounted on a PCB is bulky and expensive, making it unsuitable for space-constrained or cost-effective scenarios.

[0005] Therefore, it is urgent to provide a miniaturized and low-cost running light control circuit. Utility Model Content

[0006] The purpose of this specification is to provide a running light control circuit to solve the problem that the existing running light control circuit cannot be applied to scenarios with limited space or very low cost requirements.

[0007] In order to solve the above technical problems, the first aspect of this specification provides a flow light control circuit, including multiple lighting lamps, each lighting lamp is equipped with a power supply circuit, a digital logic unit, and a trigger unit; each lighting lamp is respectively equipped with a power supply circuit, and the power supply circuits corresponding to each lighting lamp are arranged in parallel; a power supply controllable switch is respectively provided in the power supply circuit of each lighting lamp; the output end of the digital logic unit controls the opening and closing state of the power supply controllable switch in the corresponding power supply circuit; when the input end voltage reaches the trigger threshold voltage, the digital logic unit keeps outputting a predetermined level signal to control the power supply controllable switch in the power supply circuit to be closed; the trigger unit includes a lighting capacitor, the trigger unit is connected to the digital logic unit, and the voltage that changes with the charging process when the lighting capacitor is charged is used as the input end signal of the digital logic unit; the charging speed of each lighting capacitor is different.

[0008] In some embodiments, the trigger unit includes a lighting capacitor and a resistor connected in series, and the terminal voltage of the lighting capacitor is used as the input terminal signal of the digital logic unit.

[0009] In some embodiments, after the running light control circuit is powered on as a whole, the lamps in the running light control circuit are lit in sequence, and after the last lamp is lit, all the lamps are turned off together.

[0010] In some embodiments, the flowing light control circuit also includes a first light-off unit, which includes: a light-off trigger unit, a light-off digital logic unit and a discharge trigger unit; wherein the light-off trigger unit includes a light-off capacitor, the light-off trigger unit is connected to the light-off digital logic unit, and the voltage that changes with the charging process when the light-off capacitor is charged is used as the input signal of the light-off digital logic unit; the output of the light-off digital logic unit controls whether the discharge trigger unit triggers the discharge of each lighting capacitor; when the input voltage reaches the trigger threshold voltage, the light-off digital logic unit keeps outputting a predetermined level signal to control the light-off trigger unit to trigger the discharge of each lighting capacitor; the charging speed of the light-off capacitor is less than the charging speed of each lighting capacitor.

[0011] In some embodiments, the discharge trigger unit includes multiple discharge trigger sub-units, and each lighting lamp corresponds to a first discharge trigger sub-unit; the first discharge trigger sub-unit includes a first controllable switch, the first end of the first controllable switch is connected to the output end of the light-off digital logic unit, the second end of the first controllable switch is connected to the input end of the digital logic unit corresponding to the lighting lamp, and the third end of the first controllable switch is grounded; when a predetermined level signal is input to the first end of the first controllable switch, the second end and the third end of the first controllable switch are turned on.

[0012] In some embodiments, the discharge trigger unit further includes: a second discharge trigger subunit; the second discharge trigger subunit includes a second controllable switch, the first end of the second controllable switch is connected to the output end of the light-off digital logic unit, the second end of the second controllable switch is connected to the input end of the light-off digital logic unit, and the third end of the second controllable switch is grounded; when a predetermined level signal is input to the first end of the first controllable switch, the second end and the third end of the first controllable switch are turned on.

[0013] In some embodiments, after the running light control circuit is powered on as a whole, each lamp in the running light control circuit performs a lighting and extinguishing process in sequence, and when the next lamp is lit, the previous lamp is extinguished.

[0014] In some embodiments, a second light-off unit is configured for each lighting lamp in the running light control circuit; the second light-off unit corresponding to the first lighting lamp is driven by the output signal of the digital logic unit corresponding to the second lighting lamp to form a short-circuit bypass of the first lighting lamp, so that the first lighting lamp is turned off when the second lighting lamp is turned on; the first lighting lamp and the second lighting lamp are any one of the lighting lamps in the running light control circuit.

[0015] In some embodiments, the second light-off unit corresponding to the first lighting lamp includes: a third controllable switch, a first end of the third controllable switch is connected to the output end of the digital logic unit corresponding to the second lighting lamp; a fourth controllable switch, a first end of the fourth controllable switch is connected to the second end of the third controllable switch, the second end of the fourth controllable switch is connected to the first end of the first lighting lamp, and the third end of the fourth controllable switch is connected to the second end of the first lighting lamp.

[0016] In some embodiments, the digital logic unit includes a D latch, which has an input terminal, a latch terminal, and an output terminal; when the latch terminal is at a high level, the output terminal of the D flip-flop follows the input terminal; when the latch terminal is at a low level, the D flip-flop keeps outputting the signal output at the previous moment.

[0017] In some embodiments, the digital logic unit includes a Schmitt trigger, which has an input end and an output end; when the input voltage slowly increases from less than a negative threshold voltage, the output voltage is always at a low level; when the input voltage increases to greater than a positive threshold voltage, the output voltage becomes a high level; when the input voltage slowly decreases from greater than the positive threshold voltage, the output voltage is always at a high level; when the input voltage decreases to less than the negative threshold voltage, the output voltage becomes a low level.

[0018] This specification provides a flow light control circuit, wherein each lamp is equipped with a power supply circuit, a digital logic unit, and a trigger unit. Each lamp is equipped with a power supply circuit, and the corresponding power supply circuits are connected in parallel. Each power supply circuit of each lamp is provided with a controllable power switch. The output of the digital logic unit controls the on / off state of the controllable power switch in the corresponding power supply circuit. When the input voltage reaches a trigger threshold voltage, the digital logic unit continuously outputs a predetermined level signal to control the power controllable switch in the power supply circuit to close. The trigger unit includes a lighting capacitor. The trigger unit is connected to the digital logic unit and uses the voltage of the lighting capacitor that changes with the charging process as the input signal of the digital logic unit. The charging speeds of the lighting capacitors vary. This solution utilizes the different capacitor charging speeds and the characteristic of the digital logic unit that it "maintains the output of the predetermined level signal when the input reaches the trigger threshold voltage" to control the lighting of each lamp in a flow light effect. The entire control circuit eliminates the need for large, costly chips such as single-chip microcomputers, facilitating a compact control circuit layout and reducing costs. This solution is particularly suitable for applications with limited space or low cost requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 A schematic diagram of the water lamp control circuit provided in this manual;

[0021] Figure 2 is a schematic diagram of a D flip-flop;

[0022] Figure 3 The circuit symbol and voltage transfer characteristic curve diagram of the Schmitt trigger;

[0023] Figure 4 Another schematic diagram of the water lamp control circuit provided in this manual;

[0024] Figure 5 This is a waveform diagram corresponding to a water lamp control circuit provided in this manual;

[0025] Figure 6 This is another schematic diagram of the water lamp control circuit provided in this specification;

[0026] Figure 7This is another schematic diagram of the water lamp control circuit provided in this specification;

[0027] Figure 8 This is another schematic diagram of the flowing light control circuit provided in this specification. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0029] In some scenarios, the space available for a running light controller is limited, or the cost of the running light must be kept to a minimum. Typically, a controller consisting of a microcontroller and peripheral components mounted on a PCB is bulky and expensive, making it unsuitable for space-constrained or cost-effective applications.

[0030] To this end, this specification provides a miniaturized, low-cost water lamp control circuit. Figure 1 As shown, the flow light control circuit includes: multiple lighting lamps, each lighting lamp is equipped with a power supply circuit, a digital logic unit, and a trigger unit.

[0031] Each lighting lamp is equipped with a power supply circuit, and the power supply circuits corresponding to each lighting lamp are connected in parallel. Figure 1 In the example, the positive terminals of each of the lights, LED1, LED2, and LED3, are connected to the power supply VCC, while the negative terminals are grounded. If any one light fails to illuminate, the other lights will not be affected. Each light's power supply circuit is equipped with a controllable power switch. For example, the power supply circuit for LED1 is equipped with a controllable power switch Q1, the power supply circuit for LED2 is equipped with a controllable power switch Q2, and the power supply circuit for LED3 is equipped with a controllable power switch Q3.

[0032] The controllable power switches in the power supply circuits corresponding to each lighting fixture can be transistors. For example, the base of the transistor is connected to the output of the digital logic unit, one of the emitter and collector of the transistor is connected to the power supply, and the other is grounded. At least one resistor may also be connected in series with the lighting fixture's power supply circuit.

[0033] The output end of the digital logic unit controls the on / off state of the power supply controllable switch in the corresponding power supply circuit. When the input voltage reaches the trigger threshold voltage, the digital logic unit keeps outputting a predetermined level signal to control the power supply controllable switch in the power supply circuit to be closed. For example, Figure 1 In the figure, the digital logic units are U1, U2, U3, and U4.

[0034] A digital logic unit (DLU) is a unit module composed of digital logic devices. Digital logic devices are circuits that implement logical operations and manipulations of digital signals based on binary principles. Compared to single-chip microcontrollers (MCUs) with rich interfaces and analog interfaces, digital logic devices are generally lower cost, smaller in size, and can accommodate multiple groups of logic units with the same functionality.

[0035] The trigger unit includes a lighting capacitor, the trigger unit is connected to the digital logic unit, and the voltage that changes with the charging process when the lighting capacitor is charged is used as the input signal of the digital logic unit. Figure 1 In the example, the trigger units are TR1, TR2, TR3, and TR4.

[0036] In some embodiments, the digital logic unit may be a D latch. Figure 2 As shown, the D latch has an input terminal D, a latch terminal LE, an output terminal Q, and an output terminal Q. When the latch terminal is high (ie, LE = 1), the D flip-flop is in a follow state: Q n =D, that is, when the D latch is locked, the output Q follows the input D change; when the latch end is low (ie LE = 0), the D flip-flop is in the latch state: Q n+1 =Q n , that is, when the D latch is not locked, the D latch keeps outputting the signal output at the previous moment.

[0037] When used in the flow light control circuit provided in this specification, the input terminal D of the D latch can be connected to the trigger unit, the output terminal Q (or Q, this specification only takes the output terminal connected to Q as an example to illustrate the technical principle) is connected to the power supply controllable switch in the lighting power supply circuit, and the latch terminal LE can be connected to a high level, that is, LE = 1, so that the output terminal of the D latch is in a follow-up state, that is, Q n=D. When the lighting capacitor in the trigger unit is charged and the output signal of the trigger unit reaches the trigger threshold voltage (i.e., a high level), the input of the D latch is high, and the output of the D latch is also high. This high-level signal drives the power-controllable switch in the lighting lamp power supply circuit to close, thereby lighting the lighting lamp. Then, when the lighting capacitor in the trigger unit is discharged and the output signal of the trigger unit is lower than the trigger threshold voltage (i.e., a low level), the input of the D latch is low, and the output of the D latch is also low. This low-level signal drives the power-controllable switch in the lighting lamp power supply circuit to open, thereby turning off the lighting lamp.

[0038] It should be noted that the output signal of the D latch can be used directly as the output signal of the digital logic unit, or the output signal of the D latch can be inverted and used as the output signal of the digital logic unit. In other words, the predetermined level signal output by the digital logic unit for controlling the lighting of the lighting lamp can be either a high-level signal or a low-level signal.

[0039] In other embodiments, the digital logic unit may be a Schmitt trigger. Figure 3 Shows a circuit symbol of a Schmitt trigger (left side), a voltage transfer characteristic curve (right side Figure 3 As shown in the figure, the Schmitt trigger has two key parameters: the positive threshold voltage VT+ and the negative threshold voltage VT-. As can be seen from the voltage transfer characteristic curve, the Schmitt trigger has a hysteresis characteristic, that is, when the input voltage gradually increases from less than the negative threshold voltage VT-, the output voltage remains at a low level; when the input voltage increases to greater than the positive threshold voltage, the output voltage becomes a high level; when the input voltage gradually decreases from greater than the positive threshold voltage, the output voltage remains at a high level; when the input voltage decreases to less than the negative threshold voltage VT-, the output voltage becomes a low level.

[0040] Figure 3 The example of a Schmitt trigger in which the positive threshold voltage is greater than the negative threshold voltage is shown in FIG. In some embodiments, the negative threshold voltage may also be greater than or equal to the positive threshold voltage.

[0041] When used in the flow light control circuit provided in this specification, the input end of the Schmitt trigger is connected to Vi and connected to the trigger unit, and the output end Vo is connected to the power supply controllable switch in the lighting lamp power supply circuit. When the lighting capacitor in the trigger unit is charged and the output signal of the trigger unit reaches the trigger threshold voltage (i.e., the positive threshold voltage VT+), the output end of the Schmitt trigger becomes a high level, and the high-level signal drives the power supply controllable switch in the lighting lamp power supply circuit to close, thereby lighting the lighting lamp; then, when the lighting capacitor in the trigger unit is discharged and the output signal of the trigger unit is lower than the trigger threshold voltage (i.e., the negative threshold voltage VT-), the output of the Schmitt trigger becomes a low level, and the low-level signal drives the power supply controllable switch in the lighting lamp power supply circuit to open, thereby turning off the lighting lamp.

[0042] It can be seen that the Schmitt trigger in the above-mentioned running light control circuit has two trigger threshold voltages. When the lighting capacitor is in the charging state, the trigger threshold voltage of the Schmitt trigger is the positive threshold voltage VT+; when the lighting capacitor is in the discharging state, the trigger threshold voltage of the Schmitt trigger is the negative threshold voltage VT-.

[0043] It should be noted that the output signal of the Schmitt trigger can be used directly as the output signal of the digital logic unit, or the output signal of the Schmitt trigger can be inverted and used as the output signal of the digital logic unit. In other words, the predetermined level signal output by the digital logic unit for controlling the lighting of the lighting lamp can be either a high-level signal or a low-level signal.

[0044] conform to Figure 3 The Schmitt triggers with voltage transfer characteristic curves shown on the right can be used to form the digital logic units in this specification, for example, a Schmitt trigger formed by an operational amplifier or a Schmitt trigger formed by two NE555 chips.

[0045] To achieve the aforementioned "voltage change during the charging process of the lighting capacitor," there are a variety of circuit connection methods. The following are examples of three circuit connection methods.

[0046] The first method uses the voltage difference across the lighting capacitor as the input signal of the digital logic unit. In this case, the voltage across the lighting capacitor does not need to be directly connected to the ground. Instead, the ground-closed end of the lighting capacitor can be connected to one end of a resistor, and the other end of the resistor is grounded.

[0047] The second method is to connect one end of the lighting capacitor directly to ground, and use the voltage at the other end as the input signal of the digital logic unit. In this case, the voltage at both ends of the lighting capacitor does not need to be directly connected to ground. Instead, the end of the lighting capacitor close to ground can be connected to one end of a resistor, and the other end of the resistor is grounded.

[0048] A third method uses the voltage at the far-ground terminal of the ignition capacitor as the input signal of the digital logic unit, and directly connects the near-ground terminal of the ignition capacitor to ground. For example, in some embodiments, the trigger unit includes a ignition capacitor and a resistor connected in series, and the voltage at the terminal of the ignition capacitor is used as the input signal of the digital logic unit. Figure 4 The trigger unit in is connected in this way. Figure 4 In the embodiment, a first end of the lighting capacitor is grounded, a first end of the resistor is connected to a second end of the lighting capacitor, and a second end of the resistor is connected to a power supply.

[0049] After the trigger unit is powered on, the ignition capacitor begins charging, causing the voltage across it to continuously increase. Once the voltage reaches the trigger threshold voltage of the digital logic unit, the output terminal of the digital logic unit outputs a predetermined voltage level, which triggers the power supply controllable switch to close, completing a closed loop in the circuit of the lamp and illuminating the lamp.

[0050] The charging speed of the lighting capacitor in the trigger unit corresponding to each lighting lamp is different.

[0051] Specifically, the lighting capacitor can be directly used in series with the resistor, with one end of the series connection connected to the power supply and the other end grounded, so that the trigger unit corresponding to each lighting lamp can automatically start charging from the moment the running light control system is powered on.

[0052] Charging speed refers to the duration from the moment the entire running light control circuit is powered on to the moment the signal at the input of the digital logic unit in the trigger circuit reaches the trigger threshold voltage. The longer the duration, the slower the charging speed; the shorter the duration, the faster the charging speed.

[0053] The parameters of the lighting capacitor and the resistor and / or the power supply delay time can be set so that the charging speed of the lighting capacitor in each trigger circuit is different.

[0054] by Figure 4 As an example, the D latch is used in the flow lamp control circuit shown in the figure. The control signals of LED1, LED2 and LED3 are as follows: Figure 5As shown, the sawtooth curve in the bottom column is the terminal voltage of the lighting capacitor C1 in the trigger unit corresponding to LED1, that is, the input terminal voltage V(in1) of the D latch U1; the square wave in the bottom column is the output voltage V(out1) of the D latch U1; the sawtooth curve in the third column is the terminal voltage of the lighting capacitor C2 in the trigger unit corresponding to LED2, that is, the input terminal voltage V(in2) of the D latch U2; the square wave in the third column is the output voltage V(out2) of the D latch U2; the sawtooth curve in the second column is the terminal voltage of the lighting capacitor C3 in the trigger unit corresponding to LED3, that is, the input terminal voltage V(in3) of the D latch U3; the square wave in the second column is the output voltage V(out3) of the D latch U3.

[0055] From above Figure 5 As can be seen from the graph, the charging speed of the lighting capacitors corresponding to the various lamps is C1>C2>C3 from fast to slow, that is, the terminal voltages of C1, C2, and C3 successively reach the triggering threshold voltage of the D latch, 3.5V. After the terminal voltage of the lighting capacitor (that is, the input voltage of the D latch) reaches the triggering threshold voltage of the D latch, 3.5V, the output terminal of the D latch begins to output a high level, thus obtaining Figure 5 Since the input voltages of the D latches corresponding to C1, C2, and C3 reach the trigger threshold voltage of 3.5V one after another, the rising edges of the corresponding square waves from low level to high level also occur one after another. When the D latch outputs a high level, the light is turned on. Figure 5 As can be seen from the waveforms shown, LED1 lights up at time T1, LED2 lights up at time T2, and LED3 lights up at time T3, that is, LED1, LED2, and LED3 are lit in sequence, presenting a flowing light effect.

[0056] In some embodiments, after each lighting lamp is lit with a flowing water effect, it remains lit until the flowing water lamp control circuit loses power and turns off due to some reason.

[0057] In other embodiments, a light-off unit may be provided in the flowing light control circuit. By providing the light-off unit, each lighting lamp may be automatically extinguished after being lit with a flowing water effect, and may be re-lit with a flowing water effect, thereby achieving a cyclic flowing water light effect.

[0058] Some cyclical flowing light effects can be: after the flowing light control circuit is powered on as a whole, the lamps in the flowing light control circuit are lit in sequence, and after the last lamp is lit, all the lamps are turned off together; then the lamps are lit in sequence again, and after the last lamp is lit, all the lamps are turned off together... and so on.

[0059] The flowing light control circuit package for realizing the cyclic flowing light effect includes a first light-off unit. The first light-off unit may include: a light-off trigger unit, a light-off digital logic unit and a discharge trigger unit.

[0060] The light-off trigger unit includes a light-off capacitor, the light-off trigger unit is connected to the light-off digital logic unit, and uses the voltage of the light-off capacitor that changes with the charging process as the input signal of the light-off digital logic unit. Figure 4 and Figure 6 TR4 is the light-off trigger unit, and C4 is the light-off capacitor.

[0061] The output end of the light-off digital logic unit controls whether the discharge trigger unit triggers the discharge of each lighting capacitor; when the input voltage reaches the trigger threshold voltage, the light-off digital logic unit keeps outputting a predetermined level signal to control the light-off trigger unit to trigger the discharge of each lighting capacitor. For example, Figure 4 and Figure 6 U4 is the light-off digital logic unit. Figure 6 TROFF in it is the discharge trigger unit.

[0062] The charging speed of the light-off capacitor is lower than the charging speed of each light-on capacitor. Figure 4 and Figure 6 In the embodiment, the charging speed of the light-off capacitor C4 is slower than that of the light-on capacitors C1, C2 and C3.

[0063] like Figure 6 As shown, the voltage at the terminals of the lights-off capacitor C4 reaches the trigger threshold voltage only after each of the lighting lamps LED1, LED2, and LED3 is turned on. After the voltage at the terminals of the lights-off capacitor C4 reaches the trigger threshold voltage (i.e., the voltage at the input terminals of the lights-off digital logic unit reaches the trigger threshold voltage), the lights-off digital logic unit begins to output a predetermined level signal, thereby controlling the lights-off trigger unit to trigger the discharge of each lighting capacitor. During the discharge process of each lighting capacitor, after the voltage at the terminals of the capacitor drops below the trigger threshold voltage, the output terminals of the digital logic units corresponding to each lighting lamp no longer output the predetermined level signal, and thus are unable to control the power supply controllable switch in the power supply circuit to close (i.e., the power supply controllable switch is disconnected), causing each lighting lamp to go out.

[0064] like Figure 5As shown, the jagged curve in the first column represents the terminal voltage of the light-off capacitor C4 in the light-off trigger unit, which is also the input voltage V(in4) of the D-type latch U4. The vertical line in the first column represents the output voltage V(out4) of the D-type latch U4. Because the light-off capacitor C4 charges slower than the lighting capacitors C1, C2, and C3, the light-off capacitor reaches the trigger threshold voltage of 3.5V at the latest. After the light-off capacitor C4 reaches the trigger threshold voltage of 3.5V, the light-off trigger unit triggers the lighting capacitors to discharge, thereby turning off the lighting lamps LED1, LED2, and LED3.

[0065] from Figure 5 As can be seen from the waveforms shown, LED1 lights up at time T1, LED2 lights up at time T2, LED3 lights up at time T3, and then turns off at time T4 when the capacitor reaches the trigger threshold voltage. Then, at the next time T5, the lighting lamps LED1, LED2, and LED3 are turned off together.

[0066] In some embodiments, the discharge triggering unit includes a plurality of discharge triggering subunits, and each lighting lamp corresponds to a first discharge triggering subunit.

[0067] The first discharge triggering subunit includes a first controllable switch, a first end of which is connected to the output of the light-off digital logic unit, a second end of which is connected to the input of the digital logic unit corresponding to the light, and a third end of which is grounded. When a predetermined level signal is input to the first end of the first controllable switch, the second and third ends of the first controllable switch are conductive.

[0068] The first controllable switch may specifically be a triode, an optocoupler device, a relay, etc. When the first controllable switch is a triode, the base of the triode serves as the first end of the first controllable switch.

[0069] like Figure 4 As shown, the first discharge trigger subunit corresponding to LED1 includes a first controllable switch Q1' and a resistor R1', the first discharge trigger subunit corresponding to LED2 includes a first controllable switch Q2' and a resistor R2', and the first discharge trigger subunit corresponding to LED3 includes a first controllable switch Q3' and a resistor R3'. Taking the first discharge trigger subunit corresponding to LED1 as an example, when the output terminal of the light-off digital logic unit is at a high level, that is, the base of the first controllable switch Q1' is at a high level, then the collector and emitter of the first controllable switch Q1' are turned on, thereby grounding the input terminal of the digital logic unit corresponding to LED1. Since the input terminal of the digital logic unit corresponding to LED1 is grounded, the digital logic unit cannot output a predetermined level signal, and thus cannot control the power supply controllable switch in the power supply circuit of LED1 to close, that is, LED1 is turned off.

[0070] The discharge trigger unit further includes a second discharge trigger sub-unit. The second discharge trigger sub-unit includes a second controllable switch, a first end of which is connected to the output of the light-off digital logic unit, a second end of which is connected to the input of the light-off digital logic unit, and a third end of which is grounded. When a predetermined level signal is input to the first end of the second controllable switch, the second and third ends of the second controllable switch are conductive.

[0071] The second controllable switch may specifically be a triode, an optocoupler device, a relay, etc. When the second controllable switch is a triode, the base of the triode serves as the first end of the second controllable switch.

[0072] like Figure 4 As shown, the second discharge trigger subunit includes a second controllable switch Q4' and a resistor R4'. When the output of the lights-off digital logic unit is high, that is, the base of the second controllable switch Q4' is high, the collector and emitter of the second controllable switch Q4' are turned on, thereby grounding the input of the lights-off digital logic unit. Since the input of the lights-off digital logic unit is grounded, it cannot output a predetermined level signal, and thus cannot control the conduction of the first controllable switches Q1', Q2', and Q3'. Furthermore, it cannot control the input of the digital logic unit corresponding to each lamp to be grounded, and cannot control the lamp to be turned off. In other words, each lamp can begin the next round of lighting.

[0073] In some embodiments, after the entire running light control circuit is powered on, each lamp in the running light control circuit performs a lighting and extinguishing process in sequence, and when the next lamp is lit, the previous lamp is extinguished.

[0074] The water lamp control circuit that realizes this kind of circulating water lamp effect can also be realized by the following methods: Figure 7 As shown, each lamp is equipped with a second light-off unit. The second light-off unit corresponding to the first lamp is driven by the output signal of the digital logic unit corresponding to the second lamp to form a short-circuit bypass for the first lamp, thereby turning off the first lamp when the second lamp is turned on. In other words, when the second lamp is turned on, a short-circuit bypass is formed for the first lamp, causing current to flow through the short-circuit bypass instead of the first lamp, thereby turning off the first lamp.

[0075] The first illuminating lamp and the second illuminating lamp are any illuminating lamps in the water lamp control circuit. However, according to the actual situation of the technical solution, the first illuminating lamp cannot be the last illuminating lamp to be lit, and the second illuminating lamp cannot be the first illuminating lamp to be lit.

[0076] There are various implementations of the second light-off unit. This specification provides an implementation of the second light-off unit, wherein the second light-off unit corresponding to the first lighting lamp includes a third controllable switch and a fourth controllable switch.

[0077] A first end of the third controllable switch is connected to an output end of a digital logic unit corresponding to the second lighting lamp.

[0078] The first end of the fourth controllable switch is connected to the second end of the third controllable switch, the second end of the fourth controllable switch is connected to the first end of the first lighting lamp, and the third end of the fourth controllable switch is connected to the second end of the first lighting lamp.

[0079] like Figure 8 As shown, transistor QN1B is the third controllable switch corresponding to LED1, and transistor QN1A is the fourth controllable switch corresponding to LED1. The base of transistor QN1B is connected to the output of the digital logic unit corresponding to LED2. When LED2 is turned on, the base of transistor QN1B is at a high level, causing its collector and emitter to conduct. This in turn causes the base of transistor QN1A to be at a high level, causing the collector and emitter of transistor QN1A to conduct, thus forming a short-circuit bypass for LED1.

[0080] Transistor QN2B is the third controllable switch corresponding to LED2, and transistor QN2A is the fourth controllable switch corresponding to LED2. The base of transistor QN2B is connected to the output of the digital logic unit corresponding to LED3. When LED3 is turned on, the base of transistor QN2B goes high, turning on its collector and emitter. This in turn turns on the base of transistor QN2A, turning on its collector and emitter, thus forming a short-circuit bypass for LED2.

[0081] Although the present application has been described through embodiments, those skilled in the art will appreciate that there are many modifications and variations to the present application without departing from the spirit of the present application. It is intended that the appended claims include these modifications and variations without departing from the spirit of the present application.

Claims

1. A running light control circuit, characterized in that: It includes multiple lighting lamps, each of which is equipped with a power supply circuit, a digital logic unit, and a trigger unit; wherein, Each lighting lamp is equipped with a power supply circuit, and the power supply circuits corresponding to each lighting lamp are arranged in parallel; a power supply controllable switch is provided in the power supply circuit of each lighting lamp; The output end of the digital logic unit controls the on / off state of the power supply controllable switch in the corresponding power supply circuit; when the input end voltage reaches the trigger threshold voltage, the digital logic unit keeps outputting a predetermined level signal to control the power supply controllable switch in the power supply circuit to be closed; The trigger unit includes a lighting capacitor, which is connected to the digital logic unit and uses the voltage that changes with the charging process of the lighting capacitor as the input signal of the digital logic unit; the charging speed of each lighting capacitor is different.

2. The running light control circuit according to claim 1, characterized in that: The trigger unit includes a lighting capacitor and a resistor connected in series, and the terminal voltage of the lighting capacitor is used as the input terminal signal of the digital logic unit.

3. The running light control circuit according to claim 1, characterized in that: After the running light control circuit is powered on as a whole, the lamps in the running light control circuit are lit in sequence, and after the last lamp is lit, all the lamps are turned off together.

4. The running light control circuit according to claim 1, characterized in that: The running light control circuit further includes a first light-off unit, which includes: a light-off trigger unit, a light-off digital logic unit and a discharge trigger unit; wherein, The light-off trigger unit includes a light-off capacitor, the light-off trigger unit is connected to the light-off digital logic unit, and uses the voltage of the light-off capacitor that changes with the charging process as the input signal of the light-off digital logic unit; The output end of the light-off digital logic unit controls whether the discharge trigger unit triggers the discharge of each lighting capacitor; when the input end voltage reaches the trigger threshold voltage, the light-off digital logic unit keeps outputting a predetermined level signal to control the light-off trigger unit to trigger the discharge of each lighting capacitor; The charging speed of the light-off capacitor is lower than the charging speed of each light-on capacitor.

5. The running light control circuit according to claim 4, characterized in that: The discharge trigger unit includes a plurality of discharge trigger subunits, and each lighting lamp corresponds to a first discharge trigger subunit; The first discharge trigger subunit includes a first controllable switch, a first end of the first controllable switch is connected to the output end of the light-off digital logic unit, a second end of the first controllable switch is connected to the input end of the digital logic unit corresponding to the lighting lamp, and a third end of the first controllable switch is grounded; When a predetermined level signal is input to the first end of the first controllable switch, the second end and the third end of the first controllable switch are turned on.

6. The running light control circuit according to claim 5, characterized in that: The discharge triggering unit further includes: a second discharge triggering subunit; The second discharge triggering subunit includes a second controllable switch, a first end of the second controllable switch is connected to the output end of the light-off digital logic unit, a second end of the second controllable switch is connected to the input end of the light-off digital logic unit, and a third end of the second controllable switch is grounded; When a predetermined level signal is input to the first end of the first controllable switch, the second end and the third end of the first controllable switch are turned on.

7. The running light control circuit according to claim 1, characterized in that: After the entire running light control circuit is powered on, each lamp in the running light control circuit performs a lighting and extinguishing process in sequence, and when the next lamp is lit, the previous lamp is extinguished.

8. The running light control circuit according to claim 1, characterized in that: The running light control circuit is provided with a second light-off unit for each lighting lamp; The second lighting unit corresponding to the first lighting lamp is driven by the output signal of the digital logic unit corresponding to the second lighting lamp to form a short-circuit bypass of the first lighting lamp, so that the first lighting lamp is extinguished when the second lighting lamp is lit; the first lighting lamp and the second lighting lamp are any one of the lighting lamps in the flowing light control circuit.

9. The running light control circuit according to claim 8, characterized in that: The second light-off unit corresponding to the first lighting lamp includes: a third controllable switch, wherein a first end of the third controllable switch is connected to an output end of the digital logic unit corresponding to the second lighting lamp; a fourth controllable switch, wherein a first end of the fourth controllable switch is connected to the second end of the third controllable switch, a second end of the fourth controllable switch is connected to the first end of the first lighting lamp, and a third end of the fourth controllable switch is connected to the second end of the first lighting lamp.

10. The running light control circuit according to claim 1, characterized in that: The digital logic unit includes a D latch, and the D latch has an input terminal, a latch terminal, and an output terminal; When the latch terminal is high, the output terminal of the D flip-flop follows the input terminal changes; When the latch terminal is at a low level, the D flip-flop keeps outputting the signal output at the previous moment.

11. The running light control circuit according to claim 1, characterized in that: The digital logic unit includes a Schmitt trigger, and the Schmitt trigger has an input terminal and an output terminal; When the input voltage slowly increases from less than the negative threshold voltage, the output voltage remains at a low level. When the input voltage increases to be greater than the positive threshold voltage, the output voltage becomes a high level; When the input voltage slowly decreases from greater than the positive threshold voltage, the output voltage remains high. When the input voltage decreases below the negative threshold voltage, the output voltage becomes a low level.

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