A color temperature switching circuit, switching device and lamp

Abstract

The application belongs to the technical field of lamps, and provides a color temperature switching circuit, a switching device and a lamp. The color temperature switching circuit comprises a main power module, an NFC control module and a light source control module. The main power module is configured to generate a constant current voltage signal according to an alternating current signal to supply power to a light source module. The light source control module is configured to switch the color temperature of the light source module according to a color temperature switching signal. The NFC control module is configured to generate the color temperature switching signal. The light source control module switches the color temperature of the light source module according to the color temperature switching signal. Thus, the color temperature of the light source module is continuously switched, and the problem that the existing color temperature switching circuit cannot continuously adjust the color temperature due to the use of a code switch is solved.

Description

Technical Field

[0001] This application belongs to the field of lighting technology, and in particular relates to a color temperature switching circuit, switching device and lighting fixture. Background Technology

[0002] Existing lighting color temperature control products on the market offer control methods such as wireless control and DIP switch control. Conventional wireless control requires a remote control, which is costly. Smart wireless control requires the development of an app or a gateway router, which places high demands on the application environment. DIP switch control requires an MCU and multi-position DIP switches, which have limited color temperature settings and cannot be continuously adjusted. Furthermore, DIP switches require openings in structural components, placing high demands on product space. Summary of the Invention

[0003] The purpose of this application is to provide a color temperature switching circuit, switching device and lamp, which aims to solve the problem that the existing color temperature switching circuit cannot continuously adjust the color temperature due to the use of DIP switches.

[0004] A first aspect of this application provides a color temperature switching circuit connected to a light source module, the color temperature switching circuit comprising:

[0005] The main power module, connected to the light source module, is used to receive AC signals and generate a constant current voltage signal based on the AC signals to power the light source module.

[0006] The NFC control module is used to generate color temperature switching signals;

[0007] The light source control module is connected to both the NFC control module and the light source module, and is used to receive the color temperature switching signal and switch the color temperature of the light source module according to the color temperature switching signal.

[0008] In one embodiment, the color temperature switching circuit further includes:

[0009] An auxiliary power module is connected to the output terminal of the main power module and the NFC control module, respectively, and is used to receive the constant current voltage signal and generate the auxiliary power signal according to the constant current voltage signal to power the NFC control module.

[0010] In one embodiment, the color temperature switching circuit further includes:

[0011] An EMI module, connected to the main power module, is used to filter the AC signal at the input of the main power module.

[0012] In one embodiment, the light source module includes a first light source unit and a second light source unit with different color temperatures;

[0013] Wherein, the first end of the first light source unit and the first end of the second light source unit are both connected to the main power module, and the second end of the first light source unit and the second end of the second light source unit are both connected to the light source control module;

[0014] The light source control module includes:

[0015] The first switching unit is connected to the NFC control module and the first light source unit, and is used to receive the color temperature switching signal and conduct when the color temperature switching signal is at a first level, so as to control the first light source unit to light up.

[0016] The second switching unit is connected to the NFC control module and the second light source unit, and is used to receive the color temperature switching signal and turn on when the color temperature switching signal is at the second level, so as to control the second light source unit to light up.

[0017] In one embodiment, the light source module includes a third light source unit, a fourth light source unit, and a fifth light source unit with different color temperatures;

[0018] The first end of the third light source unit, the first end of the fourth light source unit, and the first end of the fifth light source unit are all connected to the main power module, and the second end of the third light source unit, the second end of the fourth light source unit, and the second end of the fifth light source unit are all connected to the light source control module.

[0019] The light source control module includes:

[0020] The third switch unit is connected to the NFC control module and the third light source unit, and is used to receive the first color temperature switching signal provided by the NFC control module, and to turn on according to the first color temperature switching signal to control the third light source unit to light up;

[0021] The fourth switch unit is connected to the NFC control module and the fourth light source unit, and is used to receive the second color temperature switching signal provided by the NFC control module, and to turn on according to the second color temperature switching signal to control the fourth light source unit to light up;

[0022] The fifth switch unit is connected to the NFC control module and the fifth light source unit, and is used to receive the third color temperature switching signal provided by the NFC control module, and to turn on according to the third color temperature switching signal to control the fifth light source unit to light up.

[0023] In one embodiment, the third switching unit includes: a first switching transistor, a first Zener diode, and a first resistor; wherein, the first end of the first resistor, the first end of the first Zener diode, and the control end of the first switching transistor are all connected to the NFC control module, the second end of the first resistor and the second end of the first Zener diode are grounded, the first end of the first switching transistor is grounded, and the second end of the first switching transistor is connected to the third light source unit.

[0024] In one embodiment, the fourth switching unit includes: a second switching transistor, a second Zener diode, and a second resistor; wherein, the first end of the second resistor, the first end of the second Zener diode, and the control end of the second switching transistor are all connected to the NFC control module, the second end of the second resistor and the second end of the second Zener diode are grounded, the first end of the second switching transistor is grounded, and the second end of the second switching transistor is connected to the fourth light source unit.

[0025] In one embodiment, the fifth switching unit includes a third switching transistor, a third Zener diode, and a third resistor; wherein the first end of the third resistor, the first end of the third Zener diode, and the control end of the third switching transistor are all connected to the NFC control module, the second end of the third resistor is grounded to the second end of the first Zener diode, the first end of the third switching transistor is grounded, and the second end of the third switching transistor is connected to the fifth light source unit.

[0026] A second aspect of this application provides a color temperature switching device connected to a light source module, including a color temperature switching circuit as described in any of the preceding claims.

[0027] A third aspect of this application provides a lighting fixture, including a light source module and a color temperature switching circuit as described in any of the preceding claims, wherein the color temperature switching circuit is connected to the light source module.

[0028] The beneficial effects of this application embodiment compared with the prior art are as follows: This application embodiment provides a color temperature switching circuit connected to a light source module. The color temperature switching circuit includes a main power module, an NFC control module, and a light source control module. By setting the main power module to generate a constant current voltage signal based on an AC signal to power the light source module, and the light source control module to switch the color temperature of the light source module according to the color temperature switching signal, this application achieves continuous color temperature switching of the light source module by setting the NFC control module to generate the color temperature switching signal, and the light source control module to switch the color temperature of the light source module according to the color temperature switching signal, thus providing users with a good experience. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a color temperature switching circuit structure provided in one embodiment of this application;

[0030] Figure 2 This is a schematic diagram of a color temperature switching circuit structure provided in another embodiment of this application;

[0031] Figure 3 This is a schematic diagram of a color temperature switching circuit structure provided in another embodiment of this application;

[0032] Figure 4 This is a schematic diagram of a color temperature switching circuit structure provided in another embodiment of this application;

[0033] Figure 5 This is a schematic diagram of a color temperature switching circuit structure provided in another embodiment of this application;

[0034] Figure 6 A schematic diagram of the specific structure of a color temperature switching circuit provided in one embodiment of this application;

[0035] Figure 7 A schematic diagram of the specific structure of a color temperature switching circuit provided in another embodiment of this application;

[0036] Figure 8 A schematic diagram of the specific structure of a color temperature switching circuit provided in another embodiment of this application;

[0037] Figure 9 A schematic diagram of the specific structure of a color temperature switching circuit provided in another embodiment of this application;

[0038] Figure 10 A schematic diagram of the specific structure of a color temperature switching circuit provided in another embodiment of this application. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] Existing lighting color temperature control products on the market offer control methods such as wireless control and DIP switch control. Conventional wireless control requires a remote control, which is costly. Smart wireless control requires the development of an app or a gateway router, which places high demands on the application environment. DIP switch control requires an MCU and multi-position DIP switches, which have limited color temperature settings and cannot be continuously adjusted. Furthermore, DIP switches require openings in structural components, placing high demands on product space.

[0044] This shows that existing lighting color temperature products suffer from poor user experience.

[0045] To solve the above technical problems, refer to Figure 1 As shown, this application embodiment provides a color temperature switching circuit, which is connected to the light source module 100. (Refer to...) Figure 1 As shown, the color temperature switching circuit in this embodiment includes: a main power module 10, an NFC control module 20, and a light source control module 30.

[0046] Specifically, the main power module 10 is connected to the light source module 100. The main power module 10 is used to receive AC signals and generate a constant current voltage signal based on the AC signals to power the light source module 100. The NFC control module 20 is used to generate a color temperature switching signal. The light source control module 30 is connected to the NFC control module 20, the main power module 10, and the light source module 100 respectively. The light source control module 30 is used to receive the color temperature switching signal and switch the color temperature of the light source module 100 according to the color temperature switching signal.

[0047] In this embodiment, the main power module 10 is connected to an external power supply device. The main power module 10 is used to receive the AC signal provided by the external power supply device, and to rectify and transform the AC signal to generate a constant current voltage signal. It can be understood that the main power module 10 is used to directly convert the AC signal provided by the external power supply device into a constant current voltage signal to power the light source module 100, thereby improving the application scenarios of the light source module 100 and increasing the application scenarios of the light source module 100.

[0048] In this embodiment, the NFC control module 20 is used to generate a color temperature switching signal. Specifically, the NFC control module 20 can receive a color temperature control signal sent by the user, convert the color temperature control signal, and generate a color temperature switching signal. The light source control module 30 is used to receive the color temperature switching signal and switch the color temperature of the light source module 100 according to the color temperature switching signal. It can be understood that the light source module 100 is connected to both the main control module and the light source control module 30. The main power module 10 is used to provide power to the light source module 100, and the light source control module 30 is used to control the color temperature state of the light source module 100, thereby realizing the lighting of the light source module 100 and the control of its color temperature.

[0049] In one embodiment, the color temperature control signal sent by the user can be a sensing signal, and the NFC control module 20 can be a sensing module used to generate a corresponding color temperature switching signal based on the received sensing signal.

[0050] In practical applications, the transmission method of the sensing signal can be electromagnetic induction. For example, when a user brings a mobile terminal with sensing function close to the NFC control module 20, a color temperature control signal can be sent to the NFC control module 20.

[0051] In one embodiment, the NFC control module 20 can receive color temperature control signals in real time, decode the color temperature control signals, and generate color temperature switching signals to switch the color temperature of the light source module 100. Specifically, the user can send color temperature control signals according to different scenario requirements, control the NFC control module 20 to decode the color temperature control signals at a certain frequency, generate color temperature switching signals and send them to the light source control module 30 to control the color temperature switching of the light source module 100. Alternatively, the NFC control module 20 can decode the color temperature control signals all at once and then output different color temperature switching signals at a certain frequency, or the NFC control module 20 can periodically output different color temperature switching signals to the light source control module 30 to control the color temperature of the light source module 100, thereby realizing different color temperature switching of the light source module 100. In this way, the user only needs to input the color temperature control signal once, and the NFC control module 20 outputs different color temperature switching signals at a certain frequency or periodically, which can realize continuous color temperature switching of the light source module 100, improving the user experience. In one embodiment, a user can send a color temperature control signal to the NFC control module 20 via a mobile terminal, such as a mobile phone. The mobile terminal and the NFC control module 20 can be connected via Bluetooth. When the NFC control module 20 detects that the mobile terminal is close, the user pairs the Bluetooth of the mobile terminal with that of the NFC control module 20. When the connection is successful, the NFC control module 20 can send the light source pattern that can be displayed by the connected light source module 100 to the mobile terminal. The user can select the corresponding light source pattern to generate a corresponding color temperature control signal and send it to the NFC control module 20. The NFC control module 20 generates a corresponding color temperature switching signal based on the color temperature control signal to control the light source module 100 to switch the color temperature.

[0052] In one embodiment, the NFC control module 20 further includes a timing unit and a payment unit. The user can select different light source patterns and send a color temperature control signal to the NFC control module 20 via a mobile terminal. At this time, the payment unit pops up a payment portal on the mobile terminal displaying the corresponding light source pattern. The user enters through the payment portal and pays the corresponding fee. Then, the timing unit starts timing, and after a preset time, it controls the light source module 100 to turn off. By including a timing unit and a payment unit in the NFC control module 20, the application scenarios of the color temperature switching circuit are expanded.

[0053] In one embodiment, the NFC control module 20 also includes an administrator mode, which is used by the administrator to modify the timing unit and / or the charging unit. For example, with social development and the improvement of people's living standards, when it is necessary to add new light source patterns, it is also necessary to add new charging entrances to the charging unit. At this time, the administrator needs to make corresponding modifications to the NFC control module 20. However, the administrator mode generally requires setting a corresponding password so that only the administrator can enter. Existing technologies generally use traditional mechanical locks or combination locks for security protection. However, combination locks generally occupy a large volume, which is not conducive to the development of miniaturization. Mechanical locks are generally bulky and need to be carried, which is very inconvenient. Moreover, it is not aesthetically pleasing. This embodiment uses a mobile fingerprint lock. Specifically, the user registers a fingerprint for a preset time period in the NFC control module 20. When the user needs to enter the administrator mode, they also need to register a fingerprint for the same preset time period to enter. The preset time period for fingerprints means that different fingerprints can be registered continuously within the preset time. When unlocking, different fingerprints also need to be registered continuously within the preset time. For example, when the preset time is 5 seconds, the administrator can register fingerprints of different fingers within 5 seconds. When unlocking, different fingerprints also need to be registered continuously within 5 seconds to unlock. Because each person's fingerprint is different for each finger, setting different fingerprints can increase the security of entering the administrator mode.

[0054] In one embodiment, the NFC control module 20 further includes a volume control unit. For example, the volume control unit can output a corresponding color temperature switching signal according to the input volume level to switch the color temperature of the light source module 100. For example, the output volume can be compared with a preset volume. When the output volume is greater than the preset volume voltage value, a first-level color temperature switching signal is output. When the output volume is less than or equal to the preset volume voltage value, a second-level color temperature switching signal is output, thereby realizing the switching of different color temperatures of the light source module 100 and increasing the interactivity with the user.

[0055] In one embodiment, reference Figure 2 As shown, the color temperature switching circuit also includes an auxiliary power supply module 40.

[0056] Specifically, the auxiliary power module 40 is connected to the output terminal of the main power module 10 and the NFC control module 20 respectively. The auxiliary power module 40 is used to receive the constant current voltage signal and generate an auxiliary power signal based on the constant current voltage signal to power the NFC control module 20.

[0057] In this embodiment, the auxiliary power module 40 is used to generate an auxiliary power signal based on the constant current voltage signal to power the NFC control module 20. For example, the auxiliary power module 40 can draw power from the constant current voltage signal output from the main power module 10 in real time, and perform current limiting, filtering, and voltage regulation on the constant current voltage signal to generate an auxiliary power signal to power the NFC control module 20. It can be understood that both the NFC control module 20 and the light source module 100 are powered by the main power module 10. This operation can reduce the number of power supplies, simplify the circuit structure, and reduce the probability of circuit errors.

[0058] In one embodiment, reference Figure 3 As shown, the color temperature switching circuit also includes an EMI module 50.

[0059] Specifically, the EMI module 50, connected to the main power module 10, is used to filter the AC signal at the input of the main power module 10. In this embodiment, the EMI module 50 (Electromagnetic Interference) is used to filter out high-frequency pulses in the AC signal that interfere with the power supply, and also reduces the electromagnetic interference from the main power module 10 to the outside world. The EMI module 50 utilizes the characteristics of inductors and capacitors to allow AC power with a frequency of around 50Hz to pass smoothly through the filter, while high-frequency interference noise above 50Hz is filtered out. Therefore, the EMI filter is also called a low-pass filter, meaning that low frequencies can pass through while high frequencies are filtered out. In this embodiment, by setting the EMI module 50, the interference of high-frequency pulses in the AC signal to the power supply can be filtered out, while the electromagnetic interference from the main power module 10 to the outside world is also reduced, increasing the stability of the circuit and improving the user experience.

[0060] In one embodiment, reference Figure 4 As shown, the light source module 100 includes a first light source unit 101 and a second light source unit 102 with different color temperatures. The first end of both the first light source unit 101 and the first end of both the second light source unit 102 are connected to the main power module 10, and the second ends of both the first light source unit 101 and the second light source unit 102 are connected to the light source control module 30. The light source control module 30 includes a first switch unit 31 and a second switch unit 32. The first switch unit 31 is connected to both the NFC control module 20 and the first light source unit 101. The first switch unit 31 receives a color temperature switching signal and is turned on when the color temperature switching signal is at a first level to control the first light source unit 101 to light up. The second switch unit 32 is connected to both the NFC control module 20 and the second light source unit 102. The second switch unit 32 receives a color temperature switching signal and is turned on when the color temperature switching signal is at a second level to control the second light source unit 102 to light up.

[0061] In this embodiment, the light source module 100 includes a first light source unit 101 and a second light source unit 102 with different color temperatures. For example, the light source color and / or brightness of the first light source unit 101 and the second light source unit 102 are different. The light source control module 30 switches the light source color and / or brightness of the first light source unit 101 and the second light source unit 102 according to the color temperature switching signal. In this embodiment, the first switch unit 31 is used to control the color temperature of the first light source unit 101 according to the color temperature switching signal. Specifically, the NFC control module 20 can generate color temperature switching signals with different duty cycles. When the duty cycle of the color temperature switching signal received by the light source control module 30 is different, the color temperature generated by the light source module 100 is also different. For example, when the color temperature switching signal is at a first level, the first switch unit 31 is turned on. Then, the first switch unit 31 controls the color temperature of the first light source unit 101 according to the duty cycle of the color temperature switching signal. For example, by controlling the lighting and disconnection of the first light source unit 101, the color temperature of the first light source unit 101 is controlled, thereby realizing the color temperature switching of the first light source unit 101.

[0062] In one embodiment, when the color temperature switching signal is at the second level, the second switching unit 32 is turned on. Then, the second switching unit 32 controls the color temperature of the second light source unit 102 according to the duty cycle of the color temperature switching signal. For example, by controlling the on and off states of the second light source unit 102, the color temperature of the second light source unit 102 is controlled, thereby achieving color temperature switching of the second light source unit 102. It can be understood that the first switching unit 31 and the second switching unit 32 can control the first light source unit 101 and the second light source unit 102 according to color temperature switching signals with different duty cycles. The illumination status of the light source module 100 is controlled to regulate the color temperature. For example, when the first light source unit 101 is lit, the second light source unit 102 is off, and when the second light source unit 102 is lit, the first light source unit 101 is off. This achieves the switching of the color temperature of the light source module 100. Furthermore, the duty cycle of the color temperature switching signal generated by the NFC control module 20 can be controlled to determine the duration of the on and off states of the first and second light source units 101 and 102, thereby achieving the switching of the color temperature of the light source module 100. This continuous switching of the color temperature of the light source module 100 enhances the user experience.

[0063] The third switch unit is connected to the NFC control module and the third light source unit, and is used to receive the first color temperature switching signal provided by the NFC control module, and to turn on according to the first color temperature switching signal to control the third light source unit to light up;

[0064] The fourth switch unit is connected to the NFC control module and the fourth light source unit, and is used to receive the second color temperature switching signal provided by the NFC control module, and to turn on according to the second color temperature switching signal to control the fourth light source unit to light up;

[0065] The fifth switch unit is connected to the NFC control module and the fifth light source unit, and is used to receive the third color temperature switching signal provided by the NFC control module, and to turn on according to the third color temperature switching signal to control the fifth light source unit to light up.

[0066] In one embodiment, reference Figure 5 As shown, the light source module 100 includes a third light source unit 103, a fourth light source unit 104, and a fifth light source unit 105 with different color temperatures; wherein, the first end of the third light source unit 103, the first end of the fourth light source unit 104, and the first end of the fifth light source unit 105 are all connected to the main power module 10, and the second end of the third light source unit 103, the second end of the fourth light source unit 104, and the second end of the fifth light source unit 105 are all connected to the light source control module 30; the light source control module 30 includes: a third switch unit 33, a fourth switch unit 34, and a fifth switch unit 35; wherein, the third switch unit 33 is connected to the NFC control module 20 and the third light source unit 103, and the third switch unit 33 is used to receive the first color temperature switching signal provided by the NFC control module 20, and according to the... The first color temperature switching signal is activated to control the third light source unit 103 to light up; the fourth switch unit 34 is connected to the NFC control module 20 and the fourth light source unit 104, and the fourth switch unit 34 is used to receive the second color temperature switching signal provided by the NFC control module 20, and is activated according to the second color temperature switching signal to control the fourth light source unit 104 to light up; the fifth switch unit 35 is connected to the NFC control module 20 and the fifth light source unit 105, and the fifth switch unit 35 is used to receive the third color temperature switching signal provided by the NFC control module 20, and is activated according to the third color temperature switching signal to control the fifth light source unit 105 to light up. It can be understood that the color temperature switching signal provided by the NFC control module 20 includes the first color temperature switching signal, the second color temperature switching signal and the third color temperature switching signal.

[0067] In this embodiment, the light source module 100 includes a third light source unit 103, a fourth light source unit 104, and a fifth light source unit 105 with different color temperatures. It can be understood that the light source colors and / or brightness of the third light source unit 103, the fourth light source unit 104, and the fifth light source unit 105 are different. The light source control module 30 switches the light source colors and / or brightness of the third light source unit 103, the fourth light source unit 104, and the fifth light source unit 105 according to the color temperature switching signal. In this embodiment, the third switch unit 33 is used to control the color temperature of the first light source unit 101 according to the color temperature switching signal. Specifically, the NFC control module 20 can generate color temperature switching signals with different duty cycles. When the duty cycle of the color temperature switching signal received by the light source control module 30 is different, the color temperature generated by the light source module 100 is also different. Because the color temperature switching signal needs to control the third light source unit 103, the fourth light source unit 104 and the fifth light source unit 105 at the same time, the color temperature switching signal has at least three control states. When the color temperature switching signal is the first color temperature switching signal, the third switch unit 33 is turned on. Then, the third switch unit 33 controls the color temperature of the third light source unit 103 according to the duty cycle of the color temperature switching signal. For example, by controlling the lighting or turning off of the third light source unit 103, the color temperature of the third light source unit 103 is controlled, thereby realizing the color temperature switching of the third light source unit 103.

[0068] In one embodiment, when the color temperature switching signal is the second color temperature switching signal, the fourth switching unit 34 is turned on. Then, the fourth switching unit 34 controls the color temperature of the fourth light source unit 104 according to the duty cycle of the color temperature switching signal. For example, by controlling the lighting or extinguishing of the fourth light source unit 104, the color temperature of the fourth light source unit 104 is controlled, thereby achieving color temperature switching of the fourth light source unit 104. When the color temperature switching signal is the third color temperature switching signal, the fifth switching unit 35 is turned on. Then, the fifth switching unit 35 controls the color temperature of the fifth light source unit 105 according to the duty cycle of the color temperature switching signal. For example, by controlling the lighting or extinguishing of the fifth light source unit 105, the color temperature of the fifth light source unit 105 is controlled, thereby achieving color temperature switching of the fifth light source unit 105. In this embodiment, by setting the third switching unit 33, the fourth switching unit 34, and the fifth switching unit 35 to control the color temperatures of the third light source unit 103, the fourth light source unit 104, and the fifth light source unit 105 respectively, the color temperature switching of the light source module 100 is realized, improving the user experience.

[0069] In one embodiment, reference Figure 6 As shown, the third switching unit 33 includes: a first switching transistor Q1, a first Zener diode Z1, and a first resistor R1.

[0070] Specifically, the first terminal of the first resistor R1, the first terminal of the first Zener diode Z1, and the control terminal of the first switch Q1 are all connected to the NFC control module 20. The second terminal of the first resistor R1 and the second terminal of the first Zener diode Z1 are grounded, the first terminal of the first switch Q1 is grounded, and the second terminal of the first switch Q1 is connected to the third light source unit 103. In this embodiment, the first Zener diode Z1 is used to regulate the voltage of the first color temperature switching signal, so that the voltage of the color temperature switching signal is stabilized within a preset range, so as to better control the first switch Q1. The NFC control module 20 can control the switching frequency of the first switch Q1 by controlling the duty cycle of the generated color temperature switching signal, thereby realizing the color temperature switching of the third light source unit 103.

[0071] In one embodiment, reference Figure 6 As shown, the fourth switching unit 34 includes: a second switching transistor Q2, a second Zener diode Z2, and a second resistor R2.

[0072] Specifically, the first terminal of the second resistor R2, the first terminal of the second Zener diode Z2, and the control terminal of the second switch Q2 are all connected to the NFC control module 20. The second terminal of the second resistor R2 and the second terminal of the second Zener diode Z2 are grounded, the first terminal of the second switch Q2 is grounded, and the second terminal of the second switch Q2 is connected to the fourth light source unit 104. In this embodiment, the second Zener diode Z2 is used to regulate the voltage of the second color temperature switching signal, so that the voltage of the color temperature switching signal is stabilized within a preset range, so as to better control the second switch Q2. The NFC control module 20 can control the switching frequency of the second switch Q2 by controlling the duty cycle of the generated color temperature switching signal, thereby realizing the color temperature switching of the fourth light source unit 104.

[0073] In one embodiment, reference Figure 6 As shown, the fifth switching unit 35 includes: a third switching transistor Q3, a third Zener diode Z3, and a third resistor R3.

[0074] Specifically, the first terminal of the third resistor R3, the first terminal of the third Zener diode Z3, and the control terminal of the third switch Q3 are all connected to the NFC control module 20. The second terminal of the third resistor R3 is grounded to the second terminal of the first Zener diode Z1, the first terminal of the third switch Q3 is grounded, and the second terminal of the third switch Q3 is connected to the fifth light source unit 105. In this embodiment, the third Zener diode Z3 is used to regulate the voltage of the third color temperature switching signal, so that the voltage of the color temperature switching signal is stabilized within a preset range, so as to better control the third switch Q3. The NFC control module 20 can control the switching frequency of the third switch Q3 by controlling the duty cycle of the generated color temperature switching signal, thereby realizing the color temperature switching of the fifth light source unit 105.

[0075] In one embodiment, reference Figure 6As shown, the third switching unit 33 further includes a first diode D1 and a fourth resistor R4. Specifically, the first end of the first diode D1 is connected to the first end of the first switching transistor Q1, and the second end of the first diode D1 is connected to the LED+ of the main power module 10 via LED2+. The first end of the fourth resistor R4 is connected to the control end of the first switching transistor Q1, and the second end of the fourth resistor R4 is connected to the LED+ of the main power module 10 via LED2+. In one embodiment, the fourth switching unit 34 further includes a second diode D2 and a fifth resistor R5, wherein the first end of the fifth resistor R5 is connected to the control end of the second switching transistor Q2, and the second end of the fifth resistor R5 is connected to the LED+ of the main power module 10 via LED2+. The first end of the second diode D2 is connected to the second end of the second switching transistor Q2, and the second end of the second diode D2 is connected to the LED+ of the main power module 10 via LED2+. In one embodiment, the fifth switching unit 35 further includes a sixth resistor R6, the first end of the sixth resistor R6 is connected to the control end of the third switching transistor Q3, and the second end of the sixth resistor R6 is connected to the LED+ of the main power module 10 via LED2+.

[0076] In one embodiment, reference Figure 6 As shown, the third light source unit 103 is LED3, which is connected to the third switch unit 33 via LED3-; the fourth light source unit 104 is LED4, which is connected to the fourth switch unit 34 via LED4-; and the fifth light source unit 105 is LED5, which is connected to the fifth switch unit 35 via LED5-.

[0077] In one embodiment, reference Figure 7 As shown, the first switching unit 31 includes: a seventh resistor R7, an eighth resistor R8, a fourth switching transistor Q4, a fourth Zener diode Z4, and a third diode D3.

[0078] Specifically, the first end of the seventh resistor R7 and the first end of the eighth resistor R8 are both connected to the control terminal of the fourth switch Q4. The second end of the seventh resistor R7 is grounded. The second end of the eighth resistor R8 is connected to the first light source unit 101 and the main power module 10's LED+ via LED1+. The first end of the fourth switch Q4 is connected to the first light source unit 101 and the second end of the fourth switch Q4 is grounded. The first end of the fourth Zener diode Z4 is connected to the first end of the fourth switch Q4 and the second end of the fourth Zener diode Z4 is grounded. The first end of the third diode D3 is connected to the second end of the fourth switch Q4 and the second end of the third diode D3 is connected to the control terminal of the fifth switch Q5.

[0079] In one embodiment, reference Figure 7 As shown, the second switching unit 32 includes: a ninth resistor R9, a tenth resistor R10, a fifth switching transistor Q5, and a fifth Zener diode Z5.

[0080] Specifically, the first terminals of the ninth resistor R9 and the tenth resistor R10 are connected to the control terminal of the fifth switch Q5. The second terminal of the ninth resistor R9 is grounded, and the second terminal of the tenth resistor R10 is connected to the LED+ of the main power module 10 through LED1+. The first terminal of the fifth switch Q5 and the first terminal of the fifth Zener diode Z5 are connected to the second light source unit 102. The second terminal of the fifth switch Q5 and the second terminal of the fifth Zener diode Z5 are grounded. In this embodiment, the second switch unit 32 is turned on when the color temperature switching signal is at the second level to control the second light source unit 102 to light up.

[0081] In one embodiment, reference Figure 8 As shown, the auxiliary power supply module 40 includes: an eleventh resistor R11, a twelfth resistor R12, a seventh switch Q7, a sixth Zener diode Z6, a first capacitor C1, a second capacitor C2, and a third capacitor C2.

[0082] Specifically, the first terminal of the eleventh resistor R11 is connected to the main power module 10 via V+. The second terminal of the eleventh resistor R11, the first terminal of the first capacitor C1, and the first terminal of the twelfth resistor R12 are all connected to the first terminal of the seventh switch Q7. The second terminal of the first capacitor C1 is grounded. The second terminal of the twelfth resistor R12 and the control terminal of the seventh switch Q7 are all connected to the first terminal of the sixth Zener diode Z6. The second terminal of the sixth Zener diode Z6 is grounded. The second terminal of the seventh switch Q7, the first terminal of the second capacitor C2, and the first terminal of the third capacitor C2 are all connected to the NFC control module 20 via VCC. The second terminals of the second capacitor C2 and the second terminal of the third capacitor C2 are grounded. In this embodiment, the auxiliary power module 40 is used to receive a constant current voltage signal and generate an auxiliary power signal based on the constant current voltage signal to power the NFC control module 20.

[0083] In one embodiment, reference Figure 9 As shown, the main power module 10 includes: a rectifier bridge BD1, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a fourth diode D4, a fifth diode D5, a sixth diode D6, a seventh diode D7, a seventh Zener diode Z7, an eighth Zener diode Z8, a ninth Zener diode Z9, a sixth switching transistor Q6, a first transformer T1, and a first voltage regulator chip U1.

[0084] Specifically, the first terminal of the thirteenth resistor R13, the first terminal of the fifteenth resistor R15, and the first terminal of the sixth capacitor C6 are all connected to the first terminal of the first transformer T1. The second terminal of the thirteenth resistor R13 is connected to ground in series with the fourth capacitor C4. The second terminal of the thirteenth resistor R13 is also connected to the second terminal of the first transformer T1 in series with the fourteenth resistor R14 and the fifth diode D5. The second terminal of the fifteenth resistor R15 and the second terminal of the sixth capacitor C6 are all connected to the first terminal of the sixteenth resistor R16. The second terminal of the sixteenth resistor R16 is connected to the second terminal of the first transformer T1 in series with the fourth diode D4. The power supply pin VCC of the first voltage regulator chip U1 is connected to the second end of the thirteenth resistor R13. The oscillation pin RT of the first voltage regulator chip U1 is connected to ground after being in series with the seventeenth resistor R17. The compensation pin COMP of the first voltage regulator chip U1 is connected to ground after being in series with the fifth capacitor C5. The ground pin GND of the first voltage regulator chip U1 is grounded. The feedback pin FB of the first voltage regulator chip U1 is connected to ground after being in series with the eighth capacitor C8. The detection pin CS of the first voltage regulator chip U1 is connected to ground after being in series with the nineteenth resistor R19. The twentieth resistor R20 is connected in parallel with the nineteenth resistor R19. The power supply pin D of the first voltage regulator chip U1... The first transformer T1 is connected to its second terminal. The twenty-first resistor R21 is connected in parallel with the eighth capacitor C8. The eighteenth resistor R18 is connected in series between the third terminal of the first transformer T1 and the twenty-first resistor R21. The fourth terminal of the first transformer T1 is grounded. The eighth capacitor C8 is connected in series with the ninth capacitor C9 and then grounded. The sixth diode D6 is connected in series between the fifth terminal of the first transformer T1 and the first terminal of the sixth switch Q6. The first terminal of the seventh Zener diode Z7 is connected to the first terminal of the sixth switch Q6. The second terminal of the seventh Zener diode Z7 is grounded. The tenth capacitor C10 is connected in parallel with the seventh Zener diode Z7. The first terminal of resistor R22 is connected to the first terminal of the sixth switch Q6. The first terminal of resistor R22 is connected in series with the ninth Zener diode Z9 and then to the first terminal of the eleventh capacitor C11. The second terminal of the eleventh capacitor C11 is connected to the sixth terminal of the first transformer T1. Diode D7 is connected in parallel with resistor R22. The control terminal of the sixth switch Q6 is connected in series with resistor R23 and then to the first terminal of the eleventh capacitor C11. Zener diode Z8 is connected between the second terminal and the control terminal of the sixth switch Q6. The second terminal of the sixth switch Q6 is connected to the light source module 100. In this embodiment, the main power module 10 is connected to the auxiliary power module 40 via V+ and to the light source module 100 via LED+. The main power module 10 is used to receive AC signals and generate a constant current voltage signal based on the AC signals to power the light source module 100.

[0085] In one embodiment, reference Figure 9As shown, the EMI module 50 includes: a varistor RV1, a first current transformer LP1, a second current transformer LP2, a first inductor L1, a second inductor L2, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a twelfth capacitor C12, a thirteenth capacitor C13, and a fourteenth capacitor C14.

[0086] Specifically, the first current transformer LP1 and the second current transformer LP2 are connected in series. The input terminals of the first current transformer LP1 are connected to the input live wire L and the input neutral wire N, respectively. A varistor RV1 is connected in parallel between the input live wire L and the input neutral wire N. A twenty-fourth resistor is connected in series between the input terminal of the first current transformer LP1 and the input live wire L. The output terminals of the second current transformer LP2 are connected to the input terminals of the rectifier bridge BD1. The first inductor L1 is connected in series between the first output terminal of the rectifier bridge BD1 and the first terminal of the first transformer T1. A twenty-fifth resistor R25 is connected in parallel with the first inductor L1. The first terminal of the twelfth capacitor C12 is connected to the first terminal of the rectifier bridge BD1. The first output terminal is connected, the first terminal of the twelfth capacitor C12 is connected to the first terminal of the second inductor L2, the second terminal of the second inductor L2 is grounded, the second output terminal of the rectifier bridge BD1 is connected to the first terminal of the second inductor L2, the first terminal of the thirteenth capacitor C13 is connected to the first terminal of the first inductor L1, the second terminal of the thirteenth capacitor C13 is connected to ground after being connected in series with the twenty-ninth resistor R29, the twenty-sixth resistor R26, the twenty-seventh resistor R27, and the twenty-eighth resistor R28 are connected in parallel with the twenty-ninth resistor R29, the first terminal of the fourteenth capacitor C14 is connected to the first terminal of the first inductor L1, and the second terminal of the fourteenth capacitor C14 is grounded. In this embodiment, the EMI module 50 can filter out the interference of high-frequency pulses in the AC signal to the power supply, and also reduce the electromagnetic interference of the main power module 10 to the outside world, increasing the stability of the circuit and improving the user experience.

[0087] In one embodiment, reference Figure 10As shown, the NFC control module 20 includes an NFC sensor RF and a sensing chip U2. Specifically, the output terminal of the NFC sensor RF is connected to the input pins AC0 and AC1 of the sensing chip U2, respectively, for outputting a color temperature control signal to the sensing chip U2. The power supply pin VCC of the sensing chip U2 is connected to the auxiliary power supply module 40, the ground pin GND of the sensing chip U2 is grounded, and the output pins PWM1 and PWM2 of the sensing chip U2 are connected to the light source control module 30, for outputting a color temperature switching signal to the light source control module 30. It can be understood that when the light source module 100 includes a first light source unit 101 and a second light source unit 102 with different color temperatures, that is, the corresponding light source control module... 30 includes a first switching unit 31 and a second switching unit 32. At this time, the output pin PWM1 of the sensing chip U2 is connected to the interface G11 of the first switching unit 31, and the output pin PWM2 of the sensing chip U2 is floating. When the color temperature switching signal is at the first level, the first switching unit 31 is turned on, that is, when the color temperature switching signal is at the high level, the first switching unit 31 is turned on to control the first light source unit 101 to light up. When the color temperature switching signal is at the second level, that is, when the color temperature signal is at the low level, the first switching unit 31 is turned off, and the second switching unit 32 is closed to control the second light source unit 102 to light up.

[0088] In one embodiment, when the light source module 100 includes a third light source unit 103, a fourth light source unit 104, and a fifth light source unit 105 with different color temperatures, that is, the corresponding light source control module 30 includes a third switch unit 33, a fourth switch unit 104, and a fifth switch unit 35, then the output pin PWM1 of the sensing chip U2 is connected to the interface G1 of the third switch unit 33, and the output pin PWM1 of the sensing chip U2 is connected to the interface G2 of the fourth switch unit 34. When the color temperature switching signal is the first color temperature switching signal (i.e., the output pin PWM1 outputs a high level), or when the output pin PWM1 outputs a low level, the third switch unit 33 is turned on, controlling the third light source unit 103 to light up. When the color temperature switching signal is the second color temperature switching signal, that is, when the output pin PWM1 outputs a low level, or when the output pin PWM1 outputs a high level, the fourth switch unit 34 is turned on, controlling the fourth light source unit 104 to light up. When the color temperature switching signal is the third color temperature switching signal, that is, when the output pin PWM1 outputs a low level, or when the output pin PWM1 outputs a low level, the fifth switch unit 35 is turned on, controlling the fifth light source unit 105 to light up. In this embodiment, by setting the third switch unit 33, the fourth switch unit 34, and the fifth switch unit 35 to control the color temperature of the third light source unit 103, the fourth light source unit 104, and the fifth light source unit 105 respectively, the color temperature switching of the light source module 100 is realized, improving the user experience.

[0089] This application also provides a color temperature switching device connected to the light source module 100, including a color temperature switching circuit as described above.

[0090] This application also provides a lighting fixture, including a light source module 100, and a color temperature switching circuit as described in any of the above claims, wherein the color temperature switching circuit is connected to the light source module 100.

[0091] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0092] In the embodiments provided in this application, it should be understood that the disclosed apparatus / terminal devices and methods can be implemented in other ways. For example, the apparatus / terminal device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and 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 through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0093] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0094] 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 unit can be implemented in hardware or as a software functional unit.

[0095] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. 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. Such 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 color temperature switching circuit, connected with a light source module, characterized in that, The color temperature switching circuit comprises: The main power module is connected with the light source module group, and is used for receiving an alternating current signal and generating a constant current voltage signal according to the alternating current signal to supply power to the light source module group; The NFC control module is used for converting and processing a received color temperature control signal to generate a color temperature switching signal, wherein the color temperature control signal is an induction signal; The light source control module is connected with the NFC control module and the light source module group respectively, and is used for receiving the color temperature switching signal and switching the color temperature of the light source module group according to the color temperature switching signal; The color temperature switching circuit further comprises: The auxiliary power module is connected with the output end of the main power module and the NFC control module respectively, and is used for receiving the constant current voltage signal and generating an auxiliary power signal according to the constant current voltage signal to supply power to the NFC control module; The color temperature switching circuit further comprises: The EMI module is connected with the main power module, and is used for filtering the alternating current signal of the input end of the main power module; The light source module group comprises third, fourth and fifth light source units with different color temperatures; The first end of the third light source unit, the first end of the fourth light source unit and the first end of the fifth light source unit are connected with the main power module, and the second end of the third light source unit, the second end of the fourth light source unit and the second end of the fifth light source unit are connected with the light source control module; The light source control module comprises: The third switch unit is connected with the NFC control module and the third light source unit, and is used for receiving a first color temperature switching signal provided by the NFC control module and conducting according to the first color temperature switching signal to control the third light source unit to light up; The fourth switch unit is connected with the NFC control module and the fourth light source unit, and is used for receiving a second color temperature switching signal provided by the NFC control module and conducting according to the second color temperature switching signal to control the fourth light source unit to light up; The fifth switch unit is connected with the NFC control module and the fifth light source unit, and is used for receiving a third color temperature switching signal provided by the NFC control module and conducting according to the third color temperature switching signal to control the fifth light source unit to light up.

2. The color temperature switching circuit according to claim 1, wherein The third switch unit comprises a first switch tube, a first voltage stabilizing tube and a first resistor; wherein the first end of the first resistor, the first end of the first voltage stabilizing tube and the control end of the first switch tube are connected to the NFC control module, the second end of the first resistor and the second end of the first voltage stabilizing tube are grounded, the first end of the first switch tube is grounded, and the second end of the first switch tube is connected with the third light source unit.

3. The color temperature switching circuit according to claim 1, wherein The fourth switch unit comprises a second switch tube, a second voltage stabilizer and a second resistor; a first end of the second resistor, a first end of the second voltage stabilizer and a control end of the second switch tube are connected to the NFC control module; a second end of the second resistor and a second end of the second voltage stabilizer are grounded; a first end of the second switch tube is grounded; and a second end of the second switch tube is connected to the fourth light source unit.

4. The color temperature switching circuit according to claim 1, wherein The fifth switch unit comprises a third switch tube, a third voltage stabilizer and a third resistor; a first end of the third resistor, a first end of the third voltage stabilizer and a control end of the third switch tube are connected to the NFC control module; a second end of the third resistor and a second end of the first voltage stabilizer are grounded; a first end of the third switch tube is grounded; and a second end of the third switch tube is connected to the fifth light source unit.

5. A color temperature switching device, connected with a light source module, characterized in that, The color temperature switching circuit comprises the color temperature switching circuit according to any one of claims 1 to 4.

6. A luminaire comprising a light source module, characterized in that The color temperature switching circuit comprises the color temperature switching circuit according to any one of claims 1 to 4, and the color temperature switching circuit is connected to the light source module.

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