A dimming and color mixing circuit compatible with thyristors, a dimming and color mixing device, and a lighting fixture

Abstract

This application belongs to the technical field of lighting fixtures, and provides a dimming and color-tuning circuit compatible with thyristors, a dimming and color-tuning device, and a lighting fixture. The alternating current is accessed through a thyristor dimmer, and the corresponding conduction angle is set according to the thyristor control signal. The rectification module rectifies the voltage signal output by the thyristor dimmer to generate a DC voltage signal, and the compatibility module makes the circuit compatible with the voltage signal output by the thyristor dimmer. The maintenance module provides a maintenance current for the thyristor dimmer to keep it turned on. The constant current driving module receives the dimming and color-tuning control signal and the DC voltage signal, and generates a constant current driving signal according to the dimming and color-tuning control signal and the DC voltage signal to drive the light source module to work, thereby increasing the diversity of the dimming and color-tuning circuit. It can be dimmed through the thyristor dimmer and also adjusted through the wall control switch, solving the problem that the wall control dimming cannot normally switch the power when the conduction angle of the thyristor dimmer is very small.

Description

Technical Field

[0001] This application belongs to the technical field of lamps, and particularly relates to a dimming and color mixing circuit compatible with thyristors, a dimming and color mixing device, and a lamp. Background Art

[0002] Currently, thyristor dimmers have the function of controllable dimming, and thyristor dimming is a relatively common dimming method currently applied in incandescent lamps and energy-saving lamps. Its working principle is to reduce the effective value of the output voltage by cutting the input voltage waveform through the thyristor, so as to reduce the power of ordinary loads (resistive loads).

[0003] However, for dimming and color mixing linear drive products compatible with thyristors, it is impossible to adjust the brightness or color temperature through a wall switch while being compatible with thyristor dimming. There is a problem that the power cannot be normally switched when the conduction angle of the thyristor dimmer is very small in wall control dimming. Summary of the Invention

[0004] The purpose of this application is to provide a dimming and color mixing circuit compatible with thyristors, a dimming and color mixing device, and a lamp, aiming to solve the problem that the power cannot be normally switched when the conduction angle of the thyristor dimmer is very small in wall control dimming.

[0005] The first aspect of the embodiment of this application provides a dimming and color mixing circuit compatible with thyristors, which is connected to a light source module. The dimming and color mixing circuit includes:

[0006] A thyristor dimmer for accessing alternating current and setting a corresponding conduction angle according to a thyristor control signal;

[0007] A rectification module connected to the thyristor dimmer for rectifying the voltage signal output by the thyristor dimmer to generate a DC voltage signal;

[0008] A compatibility module connected to the rectification module for being compatible with the voltage signal output by the thyristor dimmer;

[0009] A maintenance module connected to the rectification module for providing a maintenance current for the thyristor dimmer to keep it turned on;

[0010] A constant current drive module connected to the rectification module for receiving a dimming and color mixing control signal and the DC voltage signal, and generating a constant current drive signal according to the dimming and color mixing control signal and the DC voltage signal to drive the light source module to work;

[0011] A ripple removal module connected to the constant current drive module for removing the ripple in the constant current drive signal.

[0012] Optionally, the dimming and color mixing circuit further includes:

[0013] A voltage stabilizing module, connected to the rectification module, for stabilizing the DC voltage signal.

[0014] Optionally, the dimming and color mixing circuit further includes:

[0015] A filtering module, connected to the rectification module, for filtering the DC voltage signal.

[0016] Optionally, the compatibility module includes: a first capacitor, a first resistor, and a second resistor;

[0017] The first end of the first capacitor is connected to the rectification module, the second end of the first capacitor, the first end of the first resistor, and the first end of the second resistor are commonly connected, and the second end of the first resistor and the second end of the second resistor are commonly connected to the ground.

[0018] Optionally, the maintaining module includes: a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and a linear driving chip;

[0019] The first end of the third resistor, the first end of the fourth resistor, and the first end of the fifth resistor are commonly connected to the rectification module, the second end of the third resistor, the second end of the fourth resistor, and the second end of the fifth resistor are commonly connected to the output pin of the linear driving chip, the input pin of the linear driving chip, the first end of the sixth resistor, and the first end of the seventh resistor are commonly connected, the second end of the sixth resistor and the second end of the seventh resistor are commonly connected to the constant current driving module, and the grounding pin of the linear driving chip is grounded.

[0020] Optionally, the constant current driving module includes: a first diode, an eighth resistor, a second capacitor, a third capacitor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, and a constant current driving chip;

[0021] The anode of the first diode is connected to the rectification module. The cathode of the first diode, the first end of the eighth resistor, the first end of the second capacitor, and the switching signal detection pin of the constant current driving chip are commonly connected to the ripple removal module. The second end of the eighth resistor is connected to the power supply pin of the constant current driving chip. The first output pin, the second output pin of the constant current driving chip, and the second end of the second capacitor are commonly connected to the light source module. The power supply pin of the constant current driving chip is connected to the first end of the third capacitor. The first constant current output current setting pin of the constant current driving chip, the first end of the ninth resistor, and the first end of the tenth resistor are commonly connected to the maintaining module. The second constant current output current setting pin of the constant current driving chip, the second end of the ninth resistor, the second end of the tenth resistor, the first end of the eleventh resistor, and the first end of the twelfth resistor are commonly connected. The second end of the eleventh resistor, the second end of the twelfth resistor, and the second end of the third capacitor are commonly connected to ground.

[0022] Optionally, the ripple removal module includes: a second diode, a third diode, a fourth diode, a first switching transistor, a thirteenth resistor, a fourteenth resistor, a fourth capacitor, a fifth capacitor, and a sixth capacitor;

[0023] The anode of the second diode, the first end of the first switching transistor, and the first end of the fourteenth resistor are commonly connected to the constant current driving module. The cathode of the second diode, the cathode of the third diode, and the second end of the fourteenth resistor are commonly connected. The anode of the third diode, the first end of the fourth capacitor, and the first end of the thirteenth resistor are commonly connected. The second end of the thirteenth resistor, the control end of the first switching transistor, and the cathode of the fourth diode are commonly connected. The anode of the fourth diode and the second end of the first switching transistor are commonly connected to the positive pole of the light source module. The second end of the fourth capacitor is connected to the first end of the fifth capacitor. The second end of the fifth capacitor and the first end of the sixth capacitor are commonly connected to the constant current driving module. The second end of the sixth capacitor is grounded.

[0024] Optionally, the rectification module is a rectifier bridge.

[0025] In the second aspect of the embodiments of the present application, a dimming and color mixing device compatible with thyristors is provided, which is connected to a light source module. The dimming and color mixing device includes the dimming and color mixing circuit as described in any one of the above.

[0026] In the third aspect of the embodiments of the present application, a lamp is provided, including: a light source module; and the dimming and color mixing circuit as described in any one of the above, and the dimming and color mixing circuit is connected to the light source module.

[0027] The embodiment of the present application provides a dimming and color - tuning circuit compatible with thyristors, a dimming and color - tuning device, and a lamp. The alternating current is accessed through a thyristor dimmer, and the corresponding conduction angle is set according to the thyristor control signal. The rectification module rectifies the voltage signal output by the thyristor dimmer to generate a DC voltage signal, and the compatibility module enables the circuit to be compatible with the voltage signal output by the thyristor dimmer. The maintenance module provides a maintenance current for the thyristor dimmer to keep it on. The constant - current driving module receives the dimming and color - tuning control signal and the DC voltage signal, and generates a constant - current driving signal according to the dimming and color - tuning control signal and the DC voltage signal to drive the light source module to work, thereby increasing the diversity of the dimming and color - tuning circuit. It can be dimmed through the thyristor dimmer and can also be adjusted through the wall - mounted switch, solving the problem that the wall - mounted dimming cannot normally switch the power when the conduction angle of the thyristor dimmer is very small. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. is a schematic circuit structure diagram of a dimming and color - tuning circuit provided by an embodiment of the present application;

[0029] Figure 2 FIG. is a schematic circuit structure diagram of another dimming and color - tuning circuit provided by an embodiment of the present application;

[0030] Figure 3 FIG. is a schematic circuit structure diagram of yet another dimming and color - tuning circuit provided by an embodiment of the present application;

[0031] Figure 4 FIG. is a schematic circuit structure diagram of a wall - mounted signal detection circuit provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In order to make the technical problems, technical solutions, and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0036] An embodiment of the present application provides a dimming and color mixing circuit compatible with thyristors. The dimming and color mixing circuit in this embodiment is connected to the light source module 00. Refer to Figure 1 As shown, the dimming and color mixing circuit includes: a thyristor dimmer 10, a rectification module 20, a compatibility module 30, a maintenance module 40, a constant current drive module 50, and a ripple removal module 60. Among them, the thyristor dimmer 10 is used to access alternating current and set a corresponding conduction angle according to the thyristor control signal; the rectification module 20 is connected to the thyristor dimmer 10 and is used to rectify the voltage signal output by the thyristor dimmer 10 to generate a DC voltage signal; the compatibility module 30 is connected to the rectification module 20 and is used to be compatible with the voltage signal output by the thyristor dimmer 10; the maintenance module 40 is connected to the rectification module 20 and is used to provide a maintenance current for the thyristor dimmer 10 to keep it on; the constant current drive module 50 is connected to the rectification module 20 and is used to receive the dimming and color mixing control signal and the DC voltage signal, and generate a constant current drive signal according to the dimming and color mixing control signal and the DC voltage signal to drive the light source module 00 to work; the ripple removal module 60 is connected to the constant current drive module 50 and is used to remove the ripple in the constant current drive signal.

[0037] In this embodiment, an alternating current is connected through the thyristor dimmer 10, and the corresponding conduction angle is set according to the thyristor control signal. The rectification module 20 rectifies the voltage signal output by the thyristor dimmer 10 to generate a direct current voltage signal, and the compatibility module 30 makes the circuit compatible with the voltage signal output by the thyristor dimmer 10. The maintenance module 40 provides a maintenance current for the thyristor dimmer 10 to keep it on. The constant current driving module 50 receives the dimming and color mixing control signal and the direct current voltage signal, and generates a constant current driving signal according to the dimming and color mixing control signal and the direct current voltage signal to drive the light source module 00 to work, thereby increasing the diversity of the dimming and color mixing circuit. It can be dimmed through the thyristor dimmer 10 and can also be adjusted through the wall control switch, solving the problem that the wall control dimming cannot normally switch the power when the conduction angle of the thyristor dimmer 10 is very small.

[0038] In one embodiment, as shown in Figure 2 The dimming and color mixing circuit further includes a voltage stabilizing module 70. The voltage stabilizing module 70 is connected to the rectification module 20 and is used for stabilizing the direct current voltage signal.

[0039] In this embodiment, by setting the voltage stabilizing module 70 at the output end of the rectification module 20, the direct current voltage signal output by the rectification module 20 can be stabilized.

[0040] In one embodiment, as shown in Figure 2 The dimming and color mixing circuit further includes a filtering module 80. The filtering module 80 is connected to the rectification module 20 and is used for filtering the direct current voltage signal.

[0041] In this embodiment, by setting the filtering module 80 at the output end of the rectification module 20, the direct current voltage signal output by the rectification module 20 can be filtered to eliminate the ripple in the direct current voltage signal.

[0042] In one embodiment, the compatibility module 30 is used to make the dimming and color mixing circuit in this embodiment compatible with the thyristor dimmer 10.

[0043] In a specific application embodiment, the compatibility module 30 can be an RC compatibility circuit, and the RC compatibility circuit can be composed of at least one capacitor and at least one resistor in series or in parallel.

[0044] In one embodiment, as shown in Figure 3 The compatibility module 30 includes: a first capacitor C1, a first resistor R1, and a second resistor R2; the first end of the first capacitor C1 is connected to the rectification module 20, the second end of the first capacitor C1, the first end of the first resistor R1, and the first end of the second resistor R2 are connected together, and the second end of the first resistor R1 and the second end of the second resistor R2 are connected together to the ground.

[0045] In this embodiment, the first capacitor C1, the first resistor R1, and the second resistor R2 can form an RC compatible circuit to make the circuit compatible with thyristors.

[0046] In specific applications, for thyristor dimming, a holding current is required to maintain conduction after the thyristor is turned on; otherwise, it will return to the cut-off state. Generally, the thyristor holding current is between a few milliamperes and dozens of milliamperes, and in some cases, it even reaches 50 milliamperes. The greater the power generated, the greater the holding current required. Conversely, if the holding current is insufficient, the conduction angle will be unstable, and the output waveform will also be uneven.

[0047] In one embodiment, the holding module 40 can be a thyristor holding circuit, mainly used to provide a certain holding current for the thyristor device to keep it turned on. For example, the holding module 40 can be composed of a linear drive chip U1 and its peripheral circuits, and the thyristor device is kept in the on state by providing a certain current.

[0048] In one embodiment, refer to Figure 3 As shown, the holding module 40 includes: a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a linear drive chip U1; the first ends of the third resistor R3, the fourth resistor R4, and the fifth resistor R5 are commonly connected to the rectification module 20, the second ends of the third resistor R3, the fourth resistor R4, and the fifth resistor R5 are commonly connected to the output pin out of the linear drive chip U1, the input pin cs of the linear drive chip U1, the first end of the sixth resistor R6, and the first end of the seventh resistor R7 are commonly connected, the second end of the sixth resistor R6 and the second end of the seventh resistor R7 are commonly connected to the constant current drive module 50, and the ground pin gnd of the linear drive chip U1 is grounded.

[0049] In this embodiment, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, and the linear drive chip U1 form a thyristor holding circuit, which is used to receive the current output by the constant current drive module 50 to generate a corresponding holding current, so as to keep the thyristor conducting and maintain the stability of the thyristor conduction angle.

[0050] In one embodiment, refer to Figure 3As shown in the figure, the constant current driving module 50 includes: a first diode D1, an eighth resistor R8, a second capacitor C2, a third capacitor C3, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a constant current driving chip U2; the anode of the first diode D1 is connected to the rectification module 20, and the cathode of the first diode D1, the first end of the eighth resistor R8, the first end of the second capacitor C2, and the switching signal detection pin SEL of the constant current driving chip U2 are commonly connected to the ripple removal module 60. The second end of the eighth resistor R8 is connected to the power supply pin VIN of the constant current driving chip U2. The first output pin OUT1, the second output pin OUT2 of the constant current driving chip U2, and the second end of the second capacitor C2 are commonly connected to the light source module 00. The power supply pin VDD of the constant current driving chip U2 is connected to the first end of the third capacitor C3. The first constant current output current setting pin CS1 of the constant current driving chip U2, the first end of the ninth resistor R9, and the first end of the tenth resistor R10 are commonly connected to the maintaining module 40. The second constant current output current setting pin CS2 of the constant current driving chip U2, the second end of the ninth resistor R9, the second end of the tenth resistor R10, the first end of the eleventh resistor R11, and the first end of the twelfth resistor R12 are commonly connected. The second end of the eleventh resistor R11, the second end of the twelfth resistor R12, and the second end of the third capacitor C3 are commonly connected to the ground.

[0051] In this embodiment, the first diode D1, the eighth resistor R8, the second capacitor C2, the third capacitor C3, the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11, the twelfth resistor R12, and the constant current driving chip U2 can form an AC-DC constant current circuit. The DC voltage signal rectified by the rectification module 20 is converted into a constant output current through a switching power supply and provided to the subsequent chopper circuit. Among them, its dimming signal line is connected to the negative pole of the light source module 00, so that the circuit achieves the purpose of dimming.

[0052] In one embodiment, the constant current driving module is also connected to a wall control switch, used to receive the wall control signal output by the wall control switch, and adjust the constant current driving signal based on this wall control signal to perform dimming or color temperature adjustment control on the light source module. For example, the wall control pin Vs of the constant current driving chip U2 is used to receive the wall control signal provided by the wall control switch. This wall control signal can be used as a dimming and color temperature adjustment control signal to control the constant current driving signal it outputs, so as to achieve dimming and color temperature adjustment control of the light source module 00. Further, the thyristor dimmer 10 can achieve current control of the DC voltage signal by adjusting its conduction angle, realizing dual dimming and color temperature adjustment control of the thyristor and the wall control switch.

[0053] In this embodiment, the switch signal detection pin SEL of the constant current drive chip U2 is connected to the cathode of the first diode D1, which can enable the constant current drive chip U2 to be in the color mixing mode. At this time, the constant current drive chip U2 adjusts the current of multiple parallel LED components in the light source module 00 by receiving the dimming and color mixing control signal, so as to realize the color temperature adjustment of the light source module 00. For example, multiple LED components are respectively connected to multiple output terminals of the constant current drive chip U2 in one-to-one correspondence, and each LED component can be an LED string.

[0054] In one embodiment, the constant current drive module 50 can also sample the DC voltage signal output by the rectification module 20, then compare the sampled signal with the dimming and color mixing control signal, and adjust the constant current drive signal according to the comparison result to realize the dimming and color mixing control of the light source module 00. For example, after sampling the DC power signal, if the sampled signal is less than the preset threshold, it can be determined that the conduction angle of the thyristor dimmer 10 is very small. At this time, the constant current drive module 50 mainly adjusts the constant current drive signal based on the dimming and color mixing signal provided by the wall control switch. For example, by controlling the switching time of the MOS tube inside it, the current magnitude of each LED component in the light source module 00 is controlled, so as to ensure that the color temperature or brightness can be normally switched through the wall control switch even when the conduction angle of the thyristor is very small.

[0055] Further, in this embodiment, a part of the current is output from the first constant current output current setting pin CS1 of the constant current drive chip U2 to the linear drive chip U1, which is used to provide the working current for the front-stage thyristor dimmer 10 through the linear drive chip U1, so as to keep the thyristor conducting and maintain the stability of the thyristor conduction angle, ensure the compatibility of the dimmer, and prevent the occurrence of flickering.

[0056] In one embodiment, the switch signal detection pin SEL of the constant current drive chip U2 can also be connected to the power pin VDD.

[0057] To detect the signal input of the wall control switch, as shown in Figure 4 The color mixing signal line or dimming signal line of the wall control is input from the Vs pin of the constant current drive chip U2, and the output port state is changed when the switch is turned on or off. Among them, the fourteenth resistor R14 and the fifteenth resistor R15 form a voltage dividing circuit to divide the signal input by the color mixing signal line or dimming signal line, and the voltage stabilizing module 51 stabilizes the divided signal. For example, the voltage stabilizing module 51 can be composed of the Zener diode Z1. The Zener diode Z1 is used as a clamping diode to ensure the voltage input of the mode selection module 52, and only changes the voltage when the switch is turned on and off, so as to ensure that the color temperature or brightness can be normally switched through the wall control even when the conduction angle of the thyristor is very small.

[0058] In one embodiment, the mode selection module 52 may be integrated within the constant current driving chip U1, and the fourteenth resistor R14, the fifteenth resistor R15, and the Zener diode Z1 may be integrated within the constant current driving chip U1, or disposed between the constant current driving chip U1 and the wall control switch.

[0059] In a specific application embodiment, the brightness of the light source module 00 can be adjusted by setting the switching interval time of the wall control switch. For example, in the dimming mode, the conduction time of the wall control switch is proportional to the brightness of the light source module 00, and the user can set the brightness of the light source module 00 by controlling the conduction time of the wall control switch.

[0060] Further, the dimming mode and the color temperature adjustment mode can be switched by turning on - turning off - turning on - turning off the wall control switch within a preset mode switching time. For example, within 2 seconds, the wall control switch is turned on - turned off - turned on - turned off, and the mode selection module 52 enters the color temperature adjustment mode. Similarly, in the color temperature adjustment mode, the conduction time of the wall control switch is proportional to the color temperature of the light source module 00, and the user can set the color temperature of the light source module 00 by controlling the conduction time of the wall control switch.

[0061] In one embodiment, referring to Figure 3 As shown, the ripple removal module 60 includes: a second diode D2, a third diode D3, a fourth diode D4, a first switching transistor Q1, a thirteenth resistor R13, a fourteenth resistor R14, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6; the anode of the second diode D2, the first end of the fourteenth resistor R14, and the first end of the first switching transistor Q1 are commonly connected to the constant current driving module 50, the cathode of the second diode D2, the cathode of the third diode D3, and the second end of the fourteenth resistor R14 are commonly connected, the anode of the third diode D3, the first end of the fourth capacitor C4, and the first end of the thirteenth resistor R13 are commonly connected, the second end of the thirteenth resistor R13, the control terminal of the first switching transistor Q1, and the cathode of the fourth diode D4 are commonly connected, the anode of the fourth diode D4 and the second end of the first switching transistor Q1 are commonly connected to the positive electrode of the light source module 00, the second end of the fourth capacitor C4 is connected to the first end of the fifth capacitor C5, the second end of the fifth capacitor C5 and the first end of the sixth capacitor C6 are commonly connected to the constant current driving module 50, and the second end of the sixth capacitor C6 is grounded.

[0062] In this embodiment, the second diode D2 and the third diode D3 are connected in series in reverse to form a clamping diode, which is used to absorb surge power. For example, under reverse application conditions, when a high-energy large pulse is applied, its operating impedance decreases, allowing a large current to pass through, and clamping the voltage within a preset voltage range. The thirteenth resistor R13, the fourteenth resistor R14, the fourth capacitor C4, the fifth capacitor C5, and the sixth capacitor C6 form an RC filter circuit, which is used to filter the DC voltage signal. When the initial DC voltage signal reaches the first switching transistor Q1, the DC voltage signal charges the fourth capacitor C4, the fifth capacitor C5, and the sixth capacitor C6. When the charging voltage reaches the conduction threshold of the first switching transistor Q, the first switching transistor Q1 conducts, and the DC voltage signal flows into the light source module 00. The current flowing out of the light source module 00 enters the constant current driving chip U2, and the constant current driving chip U2 controls the switching time of the internal MOS transistor to control the magnitude of its output current, thereby realizing the dimming control of the light source module 00. In this embodiment, the ripple removal module 60 can remove the ripple in the output current, making the output current waveform more stable, achieving the purpose of no stroboscopic and solving the problem of low-frequency stroboscopic.

[0063] In one embodiment, the first switching transistor Q1 can be an N-type MOS transistor.

[0064] In one embodiment, referring to Figure 3 As shown, the rectification module 20 is a rectifier bridge.

[0065] In this embodiment, the rectifier bridge converts the input sine wave into a DC voltage signal without a negative half-cycle, realizing full-wave rectification. Among them, the frequency of the sine wave can be 50 or 60 Hz, and it is converted into a voltage waveform of 100 or 120 Hz without a negative half-cycle.

[0066] In one embodiment, the two input terminals of the rectification module 20 are respectively connected to the input live wire L and the input neutral wire N.

[0067] In one embodiment, a fuse F1 is further provided between the rectification module 20 and the input neutral wire N.

[0068] In the second aspect of the embodiments of the present application, a dimming and color mixing device compatible with thyristors is provided, which is connected to the light source module 00. The dimming and color mixing device includes the dimming and color mixing circuit as described in any one of the above.

[0069] The embodiment of the present application provides a dimming and color - temperature - adjusting circuit compatible with thyristors, a dimming and color - temperature - adjusting device, and a lamp. The alternating current is accessed through a thyristor dimmer, and the corresponding conduction angle is set according to the thyristor control signal. The rectification module rectifies the voltage signal output by the thyristor dimmer to generate a DC voltage signal, and the compatibility module enables the circuit to be compatible with the voltage signal output by the thyristor dimmer. The maintenance module provides a maintenance current for the thyristor dimmer to keep it on. The constant - current driving module receives the dimming and color - temperature - adjusting control signal and the DC voltage signal, and generates a constant - current driving signal according to the dimming and color - temperature - adjusting control signal and the DC voltage signal to drive the light source module to work, thereby increasing the diversity of the dimming and color - temperature - adjusting circuit. It can be dimmed through a thyristor dimmer and can also be adjusted through a wall - mounted switch, solving the problem that the wall - mounted dimming cannot normally switch the power when the conduction angle of the thyristor dimmer is very small.

[0070] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the above - mentioned division of each functional unit and module is used as an example. In practical applications, the above - mentioned functions can be allocated to different functional units and modules according to needs, 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. Each functional unit and module in the embodiment can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above - mentioned integrated units can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of the present application. The specific working process of the units and modules in the above - mentioned system can refer to the corresponding process in the foregoing method embodiment and will not be elaborated here.

[0071] In the above - mentioned embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0072] The unit described as a separated component may or may not be physically separated, and the component shown as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0073] In addition, each functional unit in each embodiment of the present application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above - mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0074] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included within the protection scope of the present application.

Claims

1. A dimmer and color temperature adjustable circuit compatible with thyristors, connected to a light source module, characterized in that The dimming and color - temperature - adjusting circuit includes: A thyristor dimmer for connecting to an alternating current and setting a corresponding conduction angle according to a thyristor control signal; A rectification module connected to the thyristor dimmer for rectifying the voltage signal output by the thyristor dimmer to generate a DC voltage signal; A compatibility module connected to the rectification module for compatible with the voltage signal output by the thyristor dimmer; A maintenance module connected to the rectification module for providing a maintenance current for keeping the thyristor dimmer turned on; A constant - current driving module connected to the rectification module for receiving a dimming and color - temperature - adjusting control signal and the DC voltage signal, and generating a constant - current driving signal according to the dimming and color - temperature - adjusting control signal and the DC voltage signal to drive the light source module to work; A ripple - removing module connected to the constant - current driving module for removing the ripple in the constant - current driving signal; The constant - current driving module includes: a first diode, an eighth resistor, a second capacitor, a third capacitor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, and a constant - current driving chip; The anode of the first diode is connected to the rectification module. The cathode of the first diode, the first end of the eighth resistor, the first end of the second capacitor, and the switch - signal detection pin of the constant - current driving chip are commonly connected to the ripple - removing module. The second end of the eighth resistor is connected to the power - supply pin of the constant - current driving chip. The first output pin, the second output pin of the constant - current driving chip, and the second end of the second capacitor are commonly connected to the light source module. The power - supply pin of the constant - current driving chip is connected to the first end of the third capacitor. The first constant - current output - current setting pin of the constant - current driving chip, the first end of the ninth resistor, and the first end of the tenth resistor are commonly connected to the maintenance module. The second constant - current output - current setting pin of the constant - current driving chip, the second end of the ninth resistor, the second end of the tenth resistor, the first end of the eleventh resistor, and the first end of the twelfth resistor are commonly connected. The second end of the eleventh resistor, the second end of the twelfth resistor, and the second end of the third capacitor are commonly connected to the ground; The constant - current driving module is connected to a wall - control switch for receiving the wall - control signal output by the wall - control switch. The constant - current driving module adjusts the constant - current driving signal based on the wall - control signal to perform dimming or color - temperature - adjusting control on the light source module. The wall - control pin of the constant - current driving chip is used to receive the wall - control signal provided by the wall - control switch. This wall - control signal can be used as a dimming and color - temperature - adjusting control signal to control the constant - current driving signal output by it. The thyristor dimmer realizes dual dimming and color - temperature - adjusting control of the wall - control switch by adjusting its conduction angle.

2. The dimming and color - tuning circuit according to claim 1, wherein The dimming and color - temperature - adjusting circuit further includes: A voltage - stabilizing module connected to the rectification module for stabilizing the DC voltage signal.

3. The dimming and color - tuning circuit according to claim 1, wherein The dimming and color - temperature - adjusting circuit further includes: A filtering module connected to the rectification module for filtering the DC voltage signal.

4. The dimming and color - temperature - adjusting circuit according to claim 1, wherein, The compatibility module includes: a first capacitor, a first resistor, and a second resistor; The first end of the first capacitor is connected to the rectification module. The second end of the first capacitor, the first end of the first resistor, and the first end of the second resistor are commonly connected. The second end of the first resistor and the second end of the second resistor are commonly connected to ground.

5. The dimming and color-tuning circuit according to claim 1, wherein The maintaining module includes: a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and a linear driving chip. The first end of the third resistor, the first end of the fourth resistor, and the first end of the fifth resistor are commonly connected to the rectification module. The second end of the third resistor, the second end of the fourth resistor, and the second end of the fifth resistor are commonly connected to the output pin of the linear driving chip. The input pin of the linear driving chip, the first end of the sixth resistor, and the first end of the seventh resistor are commonly connected. The second end of the sixth resistor and the second end of the seventh resistor are commonly connected to the constant current driving module. The grounding pin of the linear driving chip is grounded.

6. The dimming and color - temperature - adjusting circuit according to claim 1, wherein The ripple removing module includes: a second diode, a third diode, a fourth diode, a first switching transistor, a thirteenth resistor, a fourteenth resistor, a fourth capacitor, a fifth capacitor, and a sixth capacitor. The anode of the second diode, the first end of the first switching transistor, and the first end of the fourteenth resistor are commonly connected to the constant current driving module. The cathode of the second diode, the cathode of the third diode, and the second end of the fourteenth resistor are commonly connected. The anode of the third diode, the first end of the fourth capacitor, and the first end of the thirteenth resistor are commonly connected. The second end of the thirteenth resistor, the control end of the first switching transistor, and the cathode of the fourth diode are commonly connected. The anode of the fourth diode and the second end of the first switching transistor are commonly connected to the positive electrode of the light source module. The second end of the fourth capacitor is connected to the first end of the fifth capacitor. The second end of the fifth capacitor and the first end of the sixth capacitor are commonly connected to the constant current driving module. The second end of the sixth capacitor is grounded.

7. The dimming and color - tuning circuit according to claim 1, wherein, The rectification module is a rectifier bridge.

8. A dimming and color - temperature - adjusting device compatible with thyristors, connected to a light source module, characterized in that, The dimming and color mixing device includes the dimming and color mixing circuit according to any one of claims 1-7.

9. A lighting fixture, characterized in that, Comprising: A light source module; And the dimming and color mixing circuit according to any one of claims 1-7, the dimming and color mixing circuit being connected to the light source module.

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