Lighting device driving circuit and laundry treating apparatus

Abstract

The application provides a kind of lighting device driving circuit and clothes processing equipment, belong to the technical field of household appliance control.Circuit includes control module, switch control module and voltage stabilizing module.Control module sends control signal.Switch control module is connected with lighting device.Switch control module is connected with control module.Switch control module controls the circuit conduction between switch control module and lighting device according to control signal.Voltage stabilizing module is connected with switch control module.Under the condition that the circuit between switch control module and lighting device is conducted, voltage stabilizing module can stabilize the voltage of switch control module, to stabilize the current between switch control module and lighting device.Through the circuit provided by the application, it is ensured that the current flowing through the lighting device remains unchanged, so that the luminous intensity of the lighting device is stable, the stability of the luminous intensity is improved, and the problem of poor luminous intensity stability of the lighting device in the traditional circuit is solved.

Description

Technical Field

[0001] This application belongs to the field of home appliance control technology, and in particular relates to a lighting device drive circuit and a clothing processing device. Background Technology

[0002] Clothing handling equipment can include devices for washing clothes, devices for drying clothes, and washer-dryer combos that combine washing and drying, such as dryers, washing machines, or washer-dryer combos. In clothing handling equipment, recessed lights are lighting devices installed on the inner wall of the drum or near the door, which enhances visibility of the drum and improves safety and the user experience.

[0003] However, in traditional circuits, voltage drop fluctuations occur when the lighting device is turned on, causing variations in the current flowing through it. These changes in current lead to variations in the brightness of the lighting device, resulting in poor stability of its luminous intensity. Utility Model Content

[0004] The purpose of this application is to provide a lighting device driving circuit and a clothing processing device, which aims to solve the problem of poor stability of the light emission brightness of lighting devices in traditional circuits.

[0005] This application provides a lighting device driving circuit, including:

[0006] The control module is used to send control signals;

[0007] A switch control module is connected to the lighting device, and the switch control module is also connected to the control module for controlling the circuit connection between the switch control module and the lighting device according to the control signal;

[0008] A voltage regulator module, connected to the switch control module, is used to stabilize the voltage of the switch control module when the circuit between the switch control module and the lighting device is connected, so as to stabilize the current between the switch control module and the lighting device.

[0009] In some embodiments of this application, the switch control module includes:

[0010] The first switch module is connected to the cathode terminal of the downlight in the lighting device. The first switch module is also connected to the control module and is used to conduct according to the control signal to control the circuit between the first switch module and the cathode terminal of the downlight.

[0011] The second switch module is connected to the anode of the downlight. The second switch module is used to turn on according to the power supply voltage signal to control the circuit connection between the second switch module and the anode of the downlight.

[0012] The voltage regulator module is connected to the second switch module and is used to stabilize the base voltage of the second switch module when the first switch module and the second switch module are conducting, so as to stabilize the current between the second switch module and the anode of the downlight.

[0013] In some embodiments of this application, the second switch module includes:

[0014] A P-type transistor is used, with its emitter terminal receiving the power supply voltage signal, its collector terminal connected to the anode terminal of the downlight, and its base terminal connected to one end of the voltage regulator module, the other end of which is grounded.

[0015] In some embodiments of this application, the second switch module further includes:

[0016] A first resistor, one end of which is connected to the emitter terminal of the P-type transistor, and the other end of which is connected to one end of the voltage regulator module;

[0017] The second resistor has one end connected to the base terminal of the P-type transistor, and the other end connected to the other end of the first resistor. The other end of the second resistor is also connected to one end of the voltage regulator module, and the other end of the voltage regulator module is grounded.

[0018] In some embodiments of this application, the voltage regulator module includes:

[0019] At least one first Zener diode, the cathode of the first Zener diode is connected to the other end of the second resistor, the cathode of the first Zener diode is also connected to the other end of the first resistor, and the anode of the first Zener diode is grounded.

[0020] In some embodiments of this application, the first switch module includes:

[0021] The first N-type transistor has its collector terminal connected to the cathode terminal of the downlight, its emitter terminal grounded, and its base terminal connected to the control module.

[0022] In some embodiments of this application, the first switch module further includes:

[0023] A third resistor, one end of which is connected to the base terminal of the first N-type transistor, and the other end of which is connected to the emitter terminal of the first N-type transistor;

[0024] A fourth resistor, one end of which is connected to the control module, and the other end of which is connected to the base terminal of the first N-type transistor. The other end of the fourth resistor is also connected to one end of the third resistor.

[0025] In some embodiments of this application, the switch control module includes:

[0026] The first switch module is connected to the cathode terminal of the downlight in the lighting device. The anode terminal of the downlight receives the power supply voltage signal. The first switch module is also connected to the control module and is used to conduct according to the control signal to control the circuit between the first switch module and the cathode terminal of the downlight.

[0027] The voltage regulator module is connected to the first switch module and is used to stabilize the base voltage of the first switch module when the first switch module is turned on, so as to stabilize the current between the first switch module and the cathode of the downlight.

[0028] In some embodiments of this application, the first switch module includes:

[0029] The second N-type transistor has its collector terminal connected to the cathode terminal of the lighting device, and its base terminal connected to one end of the voltage regulator module, while the other end of the voltage regulator module is grounded.

[0030] The fifth resistor has one end connected to the control module and the other end connected to the base terminal of the second N-type transistor.

[0031] The sixth resistor has one end connected to the emitter terminal of the second N-type transistor and the other end connected to the other end of the voltage regulator module.

[0032] In some embodiments of this application, the voltage regulator module includes:

[0033] At least one second Zener diode, the cathode of which is connected to the other end of the fifth resistor, the cathode of which is also connected to the base of the second N-type transistor, and the anode of which is connected to the other end of the sixth resistor.

[0034] In some embodiments of this application, the voltage regulator module includes two second Zener diodes;

[0035] The cathode of the first second Zener diode is connected to the other end of the fifth resistor, and the cathode of the first second Zener diode is also connected to the base of the second N-type transistor;

[0036] The cathode of the second Zener diode is connected to the anode of the first Zener diode, and the anode of the second Zener diode is connected to the other end of the sixth resistor.

[0037] This application provides a garment processing device, including a lighting device driving circuit as described in any of the above embodiments. The lighting device driving circuit is used to drive the lighting device in the garment processing device, wherein the downlight in the lighting device includes at least one light-emitting diode.

[0038] The beneficial effects of this utility model embodiment compared with the prior art are:

[0039] The control signal sent by the control module enables the circuit between the switch control module and the lighting device to conduct, allowing the lighting device to emit light. With the circuit between the switch control module and the lighting device conducting, the voltage regulator module connected to the switch control module stabilizes the voltage of the switch control module, thus stabilizing the current flowing through it and consequently stabilizing the current between the switch control module and the lighting device. This stable current between the switch control module and the lighting device ensures that the current flowing through the lighting device remains constant, improving the stability of the lighting brightness and solving the problem of poor brightness stability in traditional lighting circuits. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 The following is an overall structural block diagram of the lighting device driving circuit in some embodiments provided in this application.

[0042] Figure 2 The circuit structure block diagrams of the lighting device driving circuits in some embodiments provided in this application are shown.

[0043] Figure 3 A schematic diagram of the connection structure of the second switching module, the current stabilizing module, and the lighting device in some embodiments provided in this application.

[0044] Figure 4The circuit structure diagram of the current stabilization module is shown in some embodiments provided in this application.

[0045] Figure 5 The diagram shows the connection structure of the control module, the first switch module, and the lighting device in some embodiments provided in this application.

[0046] Figure 6 The circuit structure block diagrams of the lighting device driving circuits in some other embodiments provided in this application are shown.

[0047] Figure 7 A schematic diagram of the connection structure of the control module, the first switch module, the current stabilizing module, and the lighting device in some other embodiments provided in this application.

[0048] Figure 8 A schematic diagram of the connection structure of multiple light-emitting diodes in the downlight of the lighting device provided in this application. Detailed Implementation

[0049] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0050] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0051] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, in the embodiments of this application, the terms "first" and "second" are used to distinguish identical or similar items that have substantially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or order of execution, and that "first" and "second" do not necessarily imply difference.

[0053] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between the related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0054] Please see Figure 1 This application provides a lighting device driving circuit. The lighting device driving circuit includes a control module 10, a switch control module 20, and a voltage regulator module 30. The control module 10 is used to send control signals. The switch control module 20 is connected to the lighting device 40. The switch control module 20 is also connected to the control module 10. The switch control module 20 is used to control the circuit between the switch control module 20 and the lighting device 40 to conduct according to the control signals.

[0055] The voltage regulator module 30 is connected to the switch control module 20 and is used to stabilize the voltage of the switch control module 20 when the circuit between the switch control module 20 and the lighting device 40 is connected, so as to stabilize the current between the switch control module 20 and the lighting device 40.

[0056] In this embodiment, the control signal sent by the control module 10 controls the circuit between the switch control module 20 and the lighting device 40 to be turned on, enabling the lighting device 40 to emit light and provide illumination. With the circuit between the switch control module 20 and the lighting device 40 turned on, which can also be understood as the lighting device 40 emitting light, the voltage regulator module 30 is connected to the switch control module 20 and can stabilize the voltage of the switch control module 20. Based on the switching characteristics of the switch control module 20 and Ohm's law, the stable voltage of the switch control module 20 ensures that the current flowing through it remains stable after it is turned on. This, in turn, stabilizes the current between the switch control module 20 and the lighting device 40, thereby stabilizing the current in the light-emitting link where the lighting device 40 is located, ensuring that the current flowing through the lighting device 40 remains constant, and thus ensuring stable brightness of the lighting device 40.

[0057] The lighting device driving circuit provided in this application ensures that the current flowing through the lighting device 40 remains constant and is not affected by the voltage drop fluctuation when the lighting device is turned on, thus making the light emission brightness of the lighting device 40 stable, improving the stability of the light emission brightness, and solving the problem of poor brightness stability of lighting devices in traditional circuits.

[0058] Please see Figure 2 In some embodiments of this application, the switch control module 20 includes a first switch module 210 and a second switch module 220.

[0059] The first switch module 210 is connected to the cathode terminal of the downlight in the lighting device 40. The first switch module 210 is also connected to the control module 10, which is used to control the circuit connection between the first switch module 210 and the cathode terminal of the downlight according to the control signal DRUM-LAMP.

[0060] The second switch module 220 is connected to the anode terminal of the downlight in the lighting device 40. The second switch module 220 is used to turn on according to the power supply voltage signal VCC, thereby controlling the circuit connection between the second switch module 220 and the anode terminal of the downlight. The voltage regulator module 30 is connected to the second switch module 220 and is used to stabilize the base voltage of the second switch module 220 when the first switch module 210 and the second switch module 220 are both on, thereby stabilizing the current between the second switch module 220 and the anode terminal of the downlight.

[0061] In this embodiment, the second switch module 220 is connected to the anode terminal of the downlight. When the second switch module 220 is turned on under the control of the power supply voltage signal VCC, the connection line between the anode terminal of the downlight and the second switch module 220 is made conductive. The first switch module 210 is connected to the cathode terminal of the downlight. When the first switch module 210 is turned on under the control of the control signal DRUM-LAMP, the connection line between the cathode terminal of the downlight and the first switch module 210 is made conductive. Therefore, when the first switch module 210 and the second switch module 220 are conductive, the first switch module 210, the downlight, and the second switch module 220 form a driving link for controlling the downlight to emit light, making the connection between the anode and cathode terminals of the downlight conductive, thus controlling the downlight to emit light.

[0062] The voltage regulator module 30 is connected to the second switch module 220, and can stabilize the base voltage of the second switch module 220 when both the first switch module 210 and the second switch module 220 are turned on. The stable base voltage of the second switch module 220 ensures that the current flowing through it remains stable after it is turned on, thereby stabilizing the current between the second switch module 220 and the anode of the downlight. This, in turn, stabilizes the current between the anode and cathode of the downlight, and also stabilizes the current between the cathode and the first switch module 210. Therefore, the lighting device driving circuit provided in this application can stabilize the current in the light-emitting link of the downlight, ensuring that the current flowing through the downlight remains constant, thus stabilizing the brightness of the downlight. The lighting device driving circuit provided in this application ensures that the current flowing through the downlight remains constant and is not affected by voltage drop fluctuations when the downlight is turned on, improving the stability of the downlight's brightness and solving the problem of poor brightness stability in traditional circuits.

[0063] Furthermore, in traditional circuits, downlights generate heat during operation, causing their temperature to rise. This temperature increase leads to a shift in the downlight's characteristics, resulting in larger current variations and even more severe heat generation. Consequently, the downlight's operation becomes unstable, shortening its lifespan. The lighting device drive circuit provided in this application ensures that the current flowing through the downlight remains constant, preventing temperature rise and characteristic shifts, thus guaranteeing the stability of the downlight's operation and extending its lifespan.

[0064] Therefore, the lighting device driving circuit provided in this application can stabilize the current in the light-emitting link where the downlight is located, ensuring that the current flowing through the downlight remains constant, so as to stabilize the luminous brightness of the downlight. This solves the problem of inconsistent luminous brightness caused by differences in forward voltage and temperature effects of the downlight, and improves the stability and reliability of the luminous brightness of the downlight.

[0065] In some embodiments of this application, the control module 10 may be a microcontroller, a field-programmable gate array, or a programmable logic controller, etc.

[0066] Please see Figure 3 In some embodiments of this application, the second switch module 220 includes a P-type transistor 221. The emitter terminal of the P-type transistor 221 receives the supply voltage signal VCC. The collector terminal of the P-type transistor 221 is connected to the anode terminal of the downlight. The base terminal of the P-type transistor 221 is connected to one end of the voltage regulator module 30. The other end of the voltage regulator module 30 is grounded.

[0067] In this embodiment, the voltage at the emitter terminal of the P-type transistor 221 is the supply voltage signal VCC. The voltage at the base terminal of the P-type transistor 221 is the voltage of the voltage regulator module 30. When the voltage at the emitter terminal of the P-type transistor 221 is greater than the voltage at the base terminal of the P-type transistor 221, the P-type transistor 221 is turned on, allowing current to flow between the emitter and collector terminals of the P-type transistor 221 to the anode terminal of the downlight, thereby making the connection between the P-type transistor 221 and the anode terminal of the downlight conductive.

[0068] By connecting one end of the voltage regulator module 30 to the base terminal of the P-type transistor 221 and grounding the other end of the voltage regulator module 30, the voltage at the base terminal of the P-type transistor 221 can be stabilized, thereby stabilizing the base terminal current I of the P-type transistor 221. b Based on the current relationship I of the P-type transistor 221 in the amplification region. c ≈I e =βI b (Where β is the amplification factor of the P-type transistor 221), the base current I of the P-type transistor 221 can be obtained. b Stability allows the collector current I of the P-type transistor 221 to be stable. c The emitter current I of the P-type transistor 221 e It also remains stable. Therefore, the collector current I of the P-type transistor 221... c The current flowing through the positive and negative terminals of the downlight reaches the first switching module 210, which can stabilize the current between the positive and negative terminals of the downlight, ensuring that the current flowing through the downlight remains constant, so as to stabilize the brightness of the downlight, improve the stability of the downlight's brightness, and solve the problem of poor brightness stability of downlights in traditional circuits.

[0069] In some embodiments of this application, the second switch module 220 further includes a first resistor 222 and a second resistor 223. One end of the first resistor 222 is connected to the emitter terminal of the P-type transistor 221. The other end of the first resistor 222 is connected to one end of the voltage regulator module 30.

[0070] One end of the second resistor 223 is connected to the base terminal of the P-type transistor 221. The other end of the second resistor 223 is connected to the other end of the first resistor 222. The other end of the second resistor 223 is connected to one end of the voltage regulator module 30. The other end of the voltage regulator module 30 is grounded.

[0071] In this embodiment, the first resistor 222 is connected between the emitter terminal of the P-type transistor 221 and one end of the voltage regulator module 30. Alternatively, the first resistor 222 can be understood as being connected between the supply voltage signal VCC and one end of the voltage regulator module 30. The second resistor 223 is connected between the base terminal of the P-type transistor 221 and one end of the voltage regulator module 30. Alternatively, the second resistor 223 can be understood as being connected between the base terminal of the P-type transistor 221 and the other end of the first resistor 222.

[0072] When the control module 10 sends the control signal DRUM-LAMP to turn on the first switch module 210, current flows from the supply voltage signal VCC through the first resistor 222 to one end of the voltage regulator module 30 and then to ground. This causes the base terminal of the P-type transistor 221 to flow through the second resistor 223 to one end of the voltage regulator module 30 and then to ground. Consequently, the voltage at the base terminal of the P-type transistor 221 is less than the supply voltage signal VCC at the emitter terminal of the P-type transistor 221, thus controlling the P-type transistor 221 to turn on. The base terminal voltage VCC of the P-type transistor 221... b =VCC-V be =V 30 +V 223 V 223 =VCC-V be -V 30 =I b *R 223 The base current I flowing through the P-type transistor 221 b =V 223 / R 223 =(VCC-V be -V 30 ) / R 223 =(V b -V 30 ) / R 223 Among them, V be V represents the on-state voltage drop between the base and emitter terminals of the P-type transistor 221. 30 R is the regulated voltage value of voltage regulator module 30. 223 The resistance value of the second resistor 223 is V. 223 This is the voltage across the second resistor 223.

[0073] Therefore, the collector terminal of the P-type transistor 221 is connected to the anode terminal of the downlight. Through the P-type transistor 221, the input voltage can be converted into output current; that is, the current flowing through the downlight is the collector current I of the P-type transistor 221. c ≈I e =βI b =β*(VCC-V be -V 30 ) / R 223 β is the amplification factor of the P-type transistor 221. Therefore, it can be seen that the current flowing through the downlight is the collector current I of the P-type transistor 221. c ≈I e =βI b =β*(VCC-V be -V 30 ) / R 223 =β*(V b -V 30 ) / R 223 No longer affected by the voltage drop and temperature when the downlight is forward-biased, the current flowing through the downlight depends on the supply voltage signal VCC and the forward voltage drop V between the base and emitter terminals of the P-type transistor 221. be The voltage regulation value V of the voltage regulator module 30 30 And the resistance value of the second resistor 223. Alternatively, it can be understood that the current flowing through the downlight depends on the base voltage V of the P-type transistor 221. b The voltage regulation value V of the voltage regulator module 30 30 And the resistance value of the second resistor 223.

[0074] Therefore, the lighting device driving circuit provided in this application can stabilize the current in the light-emitting link where the downlight is located, ensuring that the current flowing through the downlight remains constant and is not affected by the voltage drop difference and temperature when the downlight is forward-conducting. This improves the stability and reliability of the downlight's brightness and solves the problem of poor brightness stability of downlights in traditional circuits.

[0075] In some embodiments of this application, the voltage regulator module 30 includes at least one first Zener diode 310. The cathode of the first Zener diode 310 is connected to the other end of the second resistor 223. The cathode of the first Zener diode 310 is connected to the other end of the first resistor 222. The anode of the first Zener diode 310 is grounded.

[0076] In this embodiment, when the reverse voltage reaches the breakdown voltage, the first Zener diode 310 enters the reverse breakdown state, which keeps the voltage across the first Zener diode 310 constant. Consequently, the voltage fluctuation between the cathode and anode of the first Zener diode 310 is minimal, fully utilizing its voltage regulation performance and ensuring the voltage across the voltage regulator module 30 remains stable. Therefore, the supply voltage signal VCC is stable, and the regulated voltage V of the voltage regulator module 30 is stable. 30 Maintaining stability, on-state voltage drop V be The stability of the second resistor 223 and its resistance value ensures that the current I flowing through the downlight is stable. c ≈I e =βI b =β*(VCC-V be -V 30 ) / R 223 =β*(V b -V 30 ) / R 223 It remains stable and is not affected by the voltage drop and temperature when the downlight is forward-conducting, ensuring that the current flowing through the downlight remains constant.

[0077] Therefore, by using at least one first Zener diode 310 in the lighting device driving circuit provided in this application, along with a first resistor 222, a second resistor 223, and a P-type transistor 221, a stable voltage can be converted into a stable current, ensuring that the current flowing through the downlight remains constant. The lighting device driving circuit provided in this application introduces the voltage regulation characteristics of a Zener diode, realizing the design of a constant current driving circuit for the downlight and improving the stability and reliability of the downlight's luminous brightness.

[0078] In some embodiments of this application, the number of first Zener diodes 310 in the voltage regulator module 30 can be set according to the actual application scenario, and is not limited to setting one first Zener diode 310.

[0079] In some embodiments of this application, the voltage regulator module 30 includes a first Zener diode 310, such as Figure 3 As shown. The cathode of the first Zener diode 310 is connected to the other end of the second resistor 223 and the other end of the first resistor 222. The anode of the first Zener diode 310 is grounded.

[0080] Please see Figure 4 In some embodiments of this application, the voltage regulator module 30 includes two first Zener diodes 310 connected in series. The cathode of the first Zener diode 310 is connected to the other end of the second resistor 223 and the other end of the first resistor 222. The anode of the first Zener diode 310 is connected to the cathode of the second Zener diode 310. The anode of the second Zener diode 310 is grounded.

[0081] By increasing the number of first Zener diodes 310 connected in series in the voltage regulator module 30, the voltage regulation values ​​of each diode can be superimposed, resulting in a higher stable voltage. This provides flexibility, allowing for selection and setting based on actual application scenarios. Therefore, by increasing the number of first Zener diodes 310 connected in series in the voltage regulator module 30, a higher voltage regulation value can be achieved, enhancing voltage regulation performance and ensuring stable and reliable circuit operation.

[0082] Please see Figure 5 In some embodiments of this application, the first switch module 210 includes a first N-type transistor 2111. The collector terminal of the first N-type transistor 2111 is connected to the cathode terminal of the downlight. The emitter terminal of the first N-type transistor 2111 is grounded. The base terminal of the first N-type transistor 2111 is connected to the control module 10.

[0083] In this embodiment, the control module 10 sends a control signal DRUM-LAMP to the base terminal of the first N-type transistor 2111. The emitter terminal of the first N-type transistor 2111 is grounded, and the voltage at the emitter terminal of the first N-type transistor 2111 is 0. When the control signal DRUM-LAMP is high, the voltage at the base terminal of the first N-type transistor 2111 is greater than the voltage at the emitter terminal of the first N-type transistor 2111, thus controlling the first N-type transistor 2111 to conduct, so that the current flowing through the downlight passes through the first N-type transistor 2111 and then to ground.

[0084] Therefore, when the P-type transistor 221 is turned on, the current flowing through the downlight is the collector current I of the P-type transistor 221. c ≈I e =βI b =β*(VCC-V be -V 30 ) / R 223 =β*(V b -V 30 ) / R 223 The light-emitting circuit of the downlight is formed by passing through the positive and negative terminals of the downlight to the collector terminal of the first N-type transistor 2111, and then through the emitter terminal of the first N-type transistor 2111 to ground, thus enabling the downlight to emit light and operate.

[0085] In some embodiments of this application, the first switching module 210 further includes a third resistor 2112 and a fourth resistor 2113. One end of the third resistor 2112 is connected to the base terminal of the first N-type transistor 2111. The other end of the third resistor 2112 is connected to the emitter terminal of the first N-type transistor 2111.

[0086] One end of the fourth resistor 2113 is connected to the control module 10. The other end of the fourth resistor 2113 is connected to the base terminal of the first N-type transistor 2111. The other end of the fourth resistor 2113 is connected to one end of the third resistor 2112.

[0087] In this embodiment, the third resistor 2112 is connected between the base and emitter terminals of the first N-type transistor 2111. The fourth resistor 2113 is connected between the control module 10 and the base terminal of the first N-type transistor 2111. The control module 10 sends a control signal DRUM-LAMP to one end of the fourth resistor 2113, and the signal reaches the base terminal of the first N-type transistor 2111 through the fourth resistor 2113.

[0088] The third resistor 2112 and the fourth resistor 2113 provide the required bias voltage to the first N-type transistor 2111, and also serve to limit current and stabilize the operating point. By controlling the conduction or cutoff of the first N-type transistor 2111 through the control module 10, the light-emitting link of the downlight can be controlled, and in combination with the P-type transistor 221 and the first Zener diode 310, the downlight can be controlled to emit light stably or stop emitting light.

[0089] Please see Figure 6 This application provides a lighting device driving circuit. The switch control module 20 in the lighting device driving circuit includes a first switch module 210.

[0090] The first switch module 210 is connected to the cathode terminal of the downlight in the lighting device 40. The anode terminal of the downlight receives the power supply voltage signal VCC. The first switch module 210 is also connected to the control module 10, which is used to control the circuit connection between the first switch module 210 and the cathode terminal of the downlight by turning on the control signal DRUM-LAMP.

[0091] The voltage regulator module 30 is connected to the first switch module 210 and is used to stabilize the base voltage of the first switch module 210 when the first switch module 210 is turned on, so as to stabilize the current between the first switch module 210 and the cathode of the downlight.

[0092] In this embodiment, the first switch module 210 is connected to the cathode of the downlight, and the anode of the downlight is connected to the power supply voltage signal VCC. The power supply voltage signal VCC, the downlight, and the first switch module 210 form the light-emitting link of the downlight. When the first switch module 210 is turned on under the control of the control signal DRUM-LAMP sent by the control module 10, the light-emitting link of the downlight can be turned on, controlling the downlight to emit light.

[0093] The voltage regulator module 30 is connected to the first switch module 210 and can stabilize the base voltage of the first switch module 210 when the first switch module 210 is turned on. Stable base voltage of the first switch module 210 ensures stable current flowing through it after it is turned on, thereby stabilizing the current between the first switch module 210 and the cathode of the downlight, and thus stabilizing the downlight's current. Therefore, the lighting device drive circuit provided in this application can stabilize the current in the light-emitting link where the downlight is located, ensuring that the current flowing through the downlight remains constant, thus stabilizing the downlight's brightness. The lighting device drive circuit provided in this application ensures that the current flowing through the downlight remains constant and is not affected by voltage drop fluctuations when the downlight is turned on, improving the stability of the downlight's brightness, solving the problem of poor brightness stability in traditional circuits, and extending the service life of the lighting device 40.

[0094] Therefore, the lighting device driving circuit provided in this application can stabilize the current in the light-emitting link where the downlight is located, ensuring that the current flowing through the downlight remains constant, so as to stabilize the luminous brightness of the downlight. This solves the problem of inconsistent luminous brightness caused by differences in forward voltage and temperature effects of the downlight, and improves the stability and reliability of the luminous brightness of the downlight.

[0095] In some embodiments of this application, the first switch module 210 includes a second N-type transistor 2121, a fifth resistor 2122, and a sixth resistor 2123. The collector terminal of the second N-type transistor 2121 is connected to the cathode terminal of the downlight. The base terminal of the second N-type transistor 2121 is connected to one end of the voltage regulator module 30. The other end of the voltage regulator module 30 is grounded. One end of the fifth resistor 2122 is connected to the control module 10. The other end of the fifth resistor 2122 is connected to the base terminal of the second N-type transistor 2121. One end of the sixth resistor 2123 is connected to the emitter terminal of the second N-type transistor 2121, and the other end of the sixth resistor 2123 is connected to the other end of the voltage regulator module 30 and is grounded.

[0096] In this embodiment, the control signal DRUM-LAMP sent by the control module 10 is connected to the base terminal of the second N-type transistor 2121 via the fifth resistor 2122. The emitter terminal of the second N-type transistor 2121 is connected to ground via the sixth resistor 2123. The fifth resistor 2122 and the sixth resistor 2123 provide the required bias voltage to the second N-type transistor 2121, and also serve to limit current and stabilize the operating point.

[0097] The power supply voltage signal VCC is the external power supply voltage. When the control signal DRUM-LAMP sent by the control module 10 is high, the voltage at the base terminal of the second N-type transistor 2121 is greater than the voltage at the emitter terminal of the second N-type transistor 2121, controlling the second N-type transistor 2121 to conduct, so that the current flows out from the power supply voltage signal VCC, through the downlight to the second N-type transistor 2121, and through the sixth resistor 2123 to ground, forming the light-emitting link of the downlight.

[0098] The voltage regulator module 30 is connected between the base terminal of the second N-type transistor 2121 and the other end of the sixth resistor 2123, with the other end of the voltage regulator module 30 grounded. The base voltage V of the second N-type transistor 2121 is... b This is the voltage of the voltage regulator module 30. Furthermore, the voltage V at the emitter terminal of the second N-type transistor 2121... e =V 30 -V be =V b -V be The current flowing through the sixth resistor 2123 is the emitter current I of the second N-type transistor 2121. e =V e / R 2123 =(V 30 -V be ) / R 2123 =(V b -V be ) / R 2123 Among them, V be V represents the on-state voltage drop between the base and emitter terminals of the second N-type transistor 2121. 30 This is the regulated voltage value of the voltage regulator module 30, and also the base voltage V of the second N-type transistor 2121. b R 2123 This is the resistance value of the sixth resistor, 2123.

[0099] The collector of the second N-type transistor 2121 is connected to the cathode of the downlight, and the anode of the downlight is connected to the power supply voltage signal VCC, forming the light-emitting path of the downlight. Therefore, when the second N-type transistor 2121 is turned on, the current between the cathode of the downlight and the collector of the second N-type transistor 2121 is the collector current I of the second N-type transistor 2121. c ≈I e =(V 30 -V be ) / R 2123 =(V b -V be ) / R 2123As can be seen from the formula, the current flowing through the downlight is no longer affected by the voltage drop and temperature when the downlight is forward-biased, but depends on the voltage regulation value of the voltage regulator module 30 and the forward voltage drop V between the base and emitter terminals of the second N-type transistor 2121. be and R 2123 The resistance value. Alternatively, it can be understood that the current flowing through the downlight is no longer affected by the voltage drop and temperature when the downlight is forward-conducting, but depends on the base voltage V of the second N-type transistor 2121. b The on-state voltage drop V between the base and emitter terminals of the second N-type transistor 2121 be and R 2123 The resistance value.

[0100] The voltage regulation value of the voltage regulator module 30, and the on-state voltage drop V between the base and emitter terminals of the second N-type transistor 2121. be and R 2123 The stability of the resistance value allows the collector current I of the second N-type transistor 2121 to be reduced. c This ensures that the current flowing through the downlight remains constant, thereby stabilizing the downlight's brightness and improving its overall brightness stability. This solves the problem of poor brightness stability in traditional downlight circuits.

[0101] In some embodiments of this application, the voltage regulator module 30 includes at least one second Zener diode 320. The cathode of the second Zener diode 320 is connected to the other end of the fifth resistor 2122. The cathode of the second Zener diode 320 is connected to the base of the second N-type transistor 2121. The anode of the second Zener diode 320 is connected to the other end of the sixth resistor 2123.

[0102] In this embodiment, when the reverse voltage reaches the breakdown voltage, the second Zener diode 320 enters a reverse breakdown state, which keeps the voltage across the second Zener diode 320 constant. Consequently, the voltage fluctuation between the cathode and anode of the second Zener diode 320 is minimal, fully utilizing its voltage regulation performance and ensuring a stable voltage across the voltage regulator module 30. Therefore, the regulated voltage V of the voltage regulator module 30 is [value missing]. 30 Maintaining stability, on-state voltage drop V be and R 2123 The resistance value is stable, allowing the current I flowing through the downlight to be stable. c ≈I e =(V 30 -V be ) / R 2123 =(V b -V be ) / R 2123 It remains stable and is not affected by the voltage drop and temperature when the downlight is forward-conducting, ensuring that the current flowing through the downlight remains constant.

[0103] Therefore, by using at least one second Zener diode 320 in the lighting device driving circuit provided in this application, along with a fifth resistor 2122, a sixth resistor 2123, and a second N-type transistor 2121, a stable voltage can be converted into a stable current, ensuring that the current flowing through the downlight remains constant. The lighting device driving circuit provided in this application introduces the voltage regulation characteristics of a Zener diode, realizing the design of a constant current driving circuit for the downlight and improving the stability and reliability of the downlight's luminous brightness.

[0104] In some embodiments of this application, the number of second Zener diodes 320 in the voltage regulator module 30 can be set according to the actual application scenario, and is not limited to setting one second Zener diode 320.

[0105] In some embodiments of this application, the voltage regulator module 30 includes a second Zener diode 320, such as Figure 6 As shown. The cathode of the second Zener diode 320 is connected to the base of the second N-type transistor 2121 and the other end of the fifth resistor 2122. The anode of the second Zener diode 320 is grounded. The voltage at the base of the second N-type transistor 2121 can be clamped to a fixed voltage value through the second Zener diode 320.

[0106] Please see Figure 7 In some embodiments of this application, the voltage regulator module 30 includes two second Zener diodes 320 connected in series. The cathode of the first second Zener diode 320 is connected to the base of the second N-type transistor 2121. The cathode of the first second Zener diode 320 is connected to the other end of the fifth resistor 2122. The anode of the first second Zener diode 320 is connected to the cathode of the second second Zener diode 320. The anode of the second second Zener diode 320 is connected to the other end of the sixth resistor 2123. The anode of the second second Zener diode 320 is grounded.

[0107] By increasing the number of second Zener diodes 320 connected in series in the voltage regulator module 30, the voltage regulation values ​​of each diode can be superimposed, resulting in a higher stable voltage. This provides flexibility, allowing for selection and setting based on actual application scenarios. Therefore, by increasing the number of second Zener diodes 320 connected in series in the voltage regulator module 30, a higher voltage regulation value can be achieved, enhancing voltage regulation performance and ensuring stable and reliable circuit operation.

[0108] This application provides a garment processing device, including a lighting device driving circuit as described in any of the above embodiments. The lighting device driving circuit drives the lighting device 40 in the garment processing device. The downlight in the lighting device 40 includes at least one light-emitting diode, such as... Figure 8 As shown.

[0109] In this embodiment, the clothing processing equipment can be a washing machine, a drying machine, or a washer-dryer combo that can both wash and dry clothes. The clothing processing equipment can be installed directly on the floor or a tabletop, or it can be wall-mounted or countertop. The clothing processing equipment can be a dryer, a washing machine, or a washer-dryer combo.

[0110] The downlight in the lighting device 40 can contain one, two, three, or more LEDs, depending on the actual application scenario. Multiple LEDs in the downlight are connected in series, for example: the cathode of the first LED (LED1) is connected to the anode of the second LED (LED2), the cathode of the second LED (LED2) is connected to the anode of the third LED (LED3), and so on. In different application scenarios, considering the number of LEDs, operating current, and voltage characteristics in the lighting device 40, the voltage of the power supply signal VCC can be set, allowing multiple LEDs to be connected in series to increase brightness.

[0111] In some embodiments of this application, the light-emitting diode in the lighting device 40 is connected to the first switch module 210 and the power supply voltage signal VCC or the second switch module 220 via connector CN1.

[0112] The number and performance parameters of resistors, transistors, and Zener diodes in the lighting device driving circuit provided in this application can be adjusted according to the actual application scenario, as long as they can realize the functions of each module in this application.

[0113] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application.

[0114] In the above embodiments, the descriptions of each embodiment have their own emphasis. Parts not described in detail or in a particular embodiment can be referred to in the relevant descriptions of other embodiments. Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0115] The division into modules or units is merely a logical functional division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0116] The units described as separate components may or may not be physically separate. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0117] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0118] The embodiments described above are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A driving circuit for a lighting device, characterized in that, include: Control module (10), used to send control signals; A switch control module (20) is connected to a lighting device (40). The switch control module (20) is also connected to the control module (10) and is used to control the circuit between the switch control module (20) and the lighting device (40) according to the control signal. A voltage regulator module (30) is connected to the switch control module (20) and is used to stabilize the voltage of the switch control module (20) when the circuit between the switch control module (20) and the lighting device (40) is connected, so as to stabilize the current between the switch control module (20) and the lighting device (40).

2. The lighting device driving circuit as described in claim 1, characterized in that, The switch control module (20) includes: The first switch module (210) is connected to the cathode end of the downlight in the lighting device (40). The first switch module (210) is also connected to the control module (10) and is used to control the circuit between the first switch module (210) and the cathode end of the downlight according to the control signal. The second switch module (220) is connected to the anode of the downlight. The second switch module (220) is used to turn on according to the power supply voltage signal to control the circuit connection between the second switch module (220) and the anode of the downlight. The voltage regulator module (30) is connected to the second switch module (220) and is used to stabilize the base voltage of the second switch module (220) when the first switch module (210) and the second switch module (220) are turned on, so as to stabilize the current between the second switch module (220) and the anode of the downlight.

3. The lighting device driving circuit as described in claim 2, characterized in that, The second switch module (220) includes: A P-type transistor (221) is used, the emitter of which receives the power supply voltage signal, the collector of which is connected to the anode of the downlight, the base of which is connected to one end of the voltage regulator module (30), and the other end of the voltage regulator module (30) is grounded.

4. The lighting device driving circuit as described in claim 3, characterized in that, The second switch module (220) also includes: A first resistor (222) is connected at one end to the emitter terminal of the P-type transistor (221), and at the other end to one end of the voltage regulator module (30). The second resistor (223) has one end connected to the base terminal of the P-type transistor (221), the other end of the second resistor (223) is connected to the other end of the first resistor (222), and the other end of the second resistor (223) is also connected to one end of the voltage regulator module (30), the other end of the voltage regulator module (30) is grounded.

5. The lighting device driving circuit as described in claim 4, characterized in that, The voltage regulator module (30) includes: At least one first Zener diode (310) is provided, the cathode of which is connected to the other end of the second resistor (223), the cathode of which is also connected to the other end of the first resistor (222), and the anode of which is grounded.

6. The lighting device driving circuit according to any one of claims 2 to 5, characterized in that, The first switch module (210) includes: The first N-type transistor (2111) has its collector terminal connected to the cathode terminal of the downlight, its emitter terminal grounded, and its base terminal connected to the control module (10).

7. The lighting device driving circuit as described in claim 6, characterized in that, The first switch module (210) further includes: A third resistor (2112) is connected at one end to the base terminal of the first N-type transistor (2111) and at the other end to the emitter terminal of the first N-type transistor (2111). The fourth resistor (2113) is connected at one end to the control module (10), and at the other end to the base of the first N-type transistor (2111). The other end of the fourth resistor (2113) is also connected to one end of the third resistor (2112).

8. The lighting device driving circuit as described in claim 1, characterized in that, The switch control module (20) includes: The first switch module (210) is connected to the cathode end of the downlight in the lighting device (40). The anode end of the downlight receives the power supply voltage signal. The first switch module (210) is also connected to the control module (10) and is used to control the circuit between the first switch module (210) and the cathode end of the downlight according to the control signal. The voltage regulator module (30) is connected to the first switch module (210) and is used to stabilize the base voltage of the first switch module (210) when the first switch module (210) is turned on, so as to stabilize the current between the first switch module (210) and the cathode of the downlight.

9. The lighting device driving circuit as described in claim 8, characterized in that, The first switch module (210) includes: The second N-type transistor (2121) has its collector terminal connected to the cathode terminal of the downlight, and its base terminal connected to one end of the voltage regulator module (30), with the other end of the voltage regulator module (30) grounded. The fifth resistor (2122) is connected at one end to the control module (10) and at the other end to the base terminal of the second N-type transistor (2121). The sixth resistor (2123) is connected at one end to the emitter terminal of the second N-type transistor (2121) and at the other end to the other end of the voltage regulator module (30).

10. The lighting device driving circuit as described in claim 9, characterized in that, The voltage regulator module (30) includes: At least one second Zener diode (320) is provided, the cathode of which is connected to the other end of the fifth resistor (2122), the cathode of which is also connected to the base of the second N-type transistor (2121), and the anode of which is connected to the other end of the sixth resistor (2123).

11. The lighting device driving circuit as described in claim 10, characterized in that, The voltage regulator module (30) includes two second voltage regulator diodes (320); The cathode of the first second Zener diode (320) is connected to the other end of the fifth resistor (2122), and the cathode of the first second Zener diode (320) is also connected to the base of the second N-type transistor (2121); The cathode of the second Zener diode (320) is connected to the anode of the first Zener diode (320), and the anode of the second Zener diode (320) is connected to the other end of the sixth resistor (2123).

12. A garment processing device, characterized in that, The device includes a lighting device driving circuit as described in any one of claims 1 to 11, the lighting device driving circuit being used to drive the lighting device (40) in the garment processing equipment, wherein the downlight in the lighting device (40) includes at least one light-emitting diode.

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