CN215773647U - Light and color adjusting circuit, driving device and lamp - Google Patents
Light and color adjusting circuit, driving device and lamp Download PDFInfo
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- CN215773647U CN215773647U CN202121565499.2U CN202121565499U CN215773647U CN 215773647 U CN215773647 U CN 215773647U CN 202121565499 U CN202121565499 U CN 202121565499U CN 215773647 U CN215773647 U CN 215773647U
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Abstract
This application is applicable to lamps and lanterns technical field, provides a mixing of colors circuit, drive arrangement and lamps and lanterns adjust luminance, and the mixing of colors circuit of adjusting luminance includes: the input module, the power selection module, the colour temperature selection module, colour temperature control module, generate light source drive signal through power module according to the direct current, light with the drive light source module, and be used for providing power selection signal to power module by the power selection module, adjust with the luminance to the light source module, be used for providing colour temperature selection signal to power module by the colour temperature selection module, power module generates a plurality of colour temperature regulation signals according to colour temperature selection signal, adjust the colour temperature of light source module with control colour temperature control module, thereby through the resistance value that changes power selection module, colour temperature selection module inserts, conveniently realize low-cost high accuracy and adjust luminance mixing of colors fast.
Description
Technical Field
The application belongs to the technical field of lamps and lanterns, especially relates to a circuit, drive arrangement and lamps and lanterns of mixing colours of adjusting luminance.
Background
At present, light-emitting diode (LED) lighting technology is rapidly developed, and in order to accelerate the popularization of LED fluorescent tubes and LED down lamps, an LED lamp with simple circuit, reliable performance and low price is urgently needed in the commercial market.
In order to accurately obtain LED drives with different brightness and color temperature, a Micro Control Unit (MCU) is required to perform signal detection and logic operation processing, so as to output multiple PWM signals with different duty ratios to perform chopping toning at an output end.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present application provides a dimming and color-adjusting circuit, a driving device and a lamp, and aims to: the problems that the dimming and toning circuit detects signals and processes logic operation through a Micro Control Unit (MCU), and the development period is long and the cost is high are solved.
The first aspect of the embodiment of the application provides a mixing of colors circuit of adjusting luminance, is connected with the light source module, it includes to adjust luminance mixing of colors circuit:
the input module is connected with the power interface and used for receiving alternating current, rectifying and filtering the alternating current and outputting direct current;
the power supply module is connected with the input module and the light source module and used for generating a light source driving signal according to the direct current so as to drive the light source module to be lightened;
the power selection module and the power supply module are used for providing a power selection signal for the power supply module so as to adjust the brightness of the light source module;
the color temperature selection module is connected with the power supply module and used for providing a color temperature selection signal for the power supply module; the power supply module is also used for generating a plurality of color temperature adjusting signals according to the color temperature selection signals;
and the color temperature control module is connected with the power module and the light source module and used for adjusting the color temperature of the light source module according to the plurality of color temperature adjusting signals.
In one embodiment, the dimming and toning circuit further comprises:
and the maximum power setting module is used for adjusting the threshold current of the power supply module so as to set the maximum current of the light source driving signal.
In one embodiment, the input module comprises:
the rectifying unit is used for rectifying the input alternating current;
and the filtering unit is used for filtering the direct current.
In one embodiment, the input module further comprises:
and the overcurrent protection unit is used for carrying out overcurrent protection on the input alternating current.
In one embodiment, the color temperature selection module is a first dial switch circuit, and the first dial switch circuit generates the corresponding color temperature selection signal according to a first dial signal to adjust the duty ratio of the plurality of color temperature adjustment signals.
In one embodiment, the power selection module is a second dial switch circuit, and the second dial switch circuit generates the corresponding power selection signal according to a second dial signal to control an internal reference voltage of the power supply module and adjust a current of the light source driving signal.
In one embodiment, the color temperature control module comprises a plurality of switch units, and the light source module comprises a plurality of light emitting units with different color temperatures;
the plurality of switch units are respectively connected with the plurality of light-emitting units in series, the plurality of switch units are connected with the power module and used for respectively receiving the plurality of color temperature adjusting signals, and each switch unit is controlled to be switched on and off according to the corresponding color temperature adjusting signal.
In one embodiment, the maximum power setting module comprises at least one adjustable resistor, a first end of the adjustable resistor is connected with a current sampling signal end of the power supply module, and a second end of the adjustable resistor is grounded;
and the power supply module sets the threshold current according to the resistance value of the adjustable resistor.
A second aspect of embodiments of the present application provides a driving apparatus, including: a dimming and toning circuit as claimed in any one of the preceding claims.
A third aspect of embodiments of the present application provides a luminaire, including: a light source module; and the dimming and toning circuit is connected with the light source module.
The embodiment of the application provides a mixing of colors circuit, drive arrangement and lamps and lanterns adjust luminance, and the mixing of colors circuit of adjusting luminance includes: the input module, the power selection module, the colour temperature selection module, colour temperature control module, generate light source drive signal through power module according to the direct current, light with the drive light source module, and be used for providing power selection signal to power module by the power selection module, adjust with the luminance to the light source module, be used for providing colour temperature selection signal to power module by the colour temperature selection module, power module generates a plurality of colour temperature regulation signals according to colour temperature selection signal, adjust the colour temperature of light source module with control colour temperature control module, thereby through the resistance value that changes power selection module, colour temperature selection module inserts, conveniently realize low-cost high accuracy and adjust luminance mixing of colors fast.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dimming and toning circuit according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a dimming and toning circuit according to another embodiment of the present application;
fig. 3 is a schematic structural diagram of a dimming and toning circuit according to another embodiment of the present application;
fig. 4 is a schematic diagram illustrating a relationship between a voltage value and a duty ratio of a PWM signal according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application and the drawings described above, are intended to cover non-exclusive inclusions. For example, a process, method, or system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.
In order to enable the LED to drive and accurately control the light source module to obtain different brightness and color temperature, the MCU is generally required to be adopted for signal detection and logic operation processing, and multiple paths of PWM signals with different duty ratios are output to carry out chopping and color mixing of the output end.
In order to solve the above technical problem, an embodiment of the present application provides a dimming and color mixing circuit, and this dimming and color mixing circuit is connected with light source module 60, and the dimming and color mixing circuit includes: the device comprises an input module 10, a power supply module 20, a power selection module 30, a color temperature selection module 40 and a color temperature control module 50, wherein the input module 10 is connected with a power supply interface and used for receiving alternating current, rectifying and filtering the alternating current and outputting direct current; the power module 20 is connected with the input module 10 and the light source module 60, and is configured to generate a light source driving signal according to the direct current to drive the light source module 60 to light up; the power selection module 30 and the power supply module 20 are configured to provide a power selection signal to the power supply module 20 to adjust the brightness of the light source module 60; the color temperature selection module 40 is connected to the power supply module 20 and configured to provide a color temperature selection signal to the power supply module 20; the power supply module 20 is further configured to generate a plurality of color temperature adjustment signals according to the color temperature selection signal; the color temperature control module 50 is connected to the power module 20 and the light source module 60, and is configured to adjust the color temperature of the light source module 60 according to a plurality of color temperature adjustment signals.
In this embodiment, the power module 20 generates a light source driving signal according to the direct current to drive the light source module 60 to light, the power selection module 30 is configured to provide a power selection signal to the power module 20 to adjust the brightness of the light source module 60, the color temperature selection module 40 is configured to provide a color temperature selection signal to the power module 20, the power module 20 generates a plurality of color temperature adjustment signals according to the color temperature selection signal to control the color temperature control module 50 to adjust the color temperature of the light source module 60, and thus, by changing the resistance values accessed by the power selection module 30 and the color temperature selection module 40, low-cost, high-precision dimming and color adjustment can be quickly and conveniently realized.
In one embodiment, referring to fig. 2, the dimming and toning circuit further includes a maximum power setting module 70, and the maximum power setting module 70 is used for adjusting the threshold current of the power module 20 to set the maximum current of the light source driving signal.
Specifically, the maximum power setting module 70 sets the maximum output current of the power module 20 by setting the threshold current of the power module, for example, the maximum power setting module 70 adjusts the resistance value of the maximum current sampling pin of the driver chip U1 in the power module 20 to adjust the threshold current of the power module 20, so as to set the maximum current of the light source driving signal.
In one embodiment, the input module 10 includes a rectifying unit 12 and a filtering unit 13, wherein the rectifying unit 12 is configured to rectify an input ac power; the filter unit 13 is used to filter the direct current.
In the present embodiment, the rectifying unit 12 and the filtering unit 13 are connected in series, wherein the filtering unit 13 is disposed at the output end of the rectifying unit 12 and is used for filtering the direct current outputted by the rectifying unit.
In one embodiment, the rectifying unit 12 may be a rectifying bridge circuit, and the filtering unit 13 may be a filtering circuit composed of a plurality of filtering capacitors.
In one embodiment, the input module 10 further includes an overcurrent protection unit 11, and the overcurrent protection unit 11 is configured to perform overcurrent protection on the input ac power.
In the present embodiment, the overcurrent protection unit 11 is arranged before the rectification unit 12, and is used for performing overcurrent protection on the ac input by the power interface, so as to prevent the input ac current from being too large and damaging the subsequent circuit.
In one embodiment, referring to fig. 3, the input module 10 includes a fuse FR and a rectifier bridge BD1, wherein a first end of the fuse FR is connected to the live line L1 of the power interface, a second end of the fuse FR is connected to the first input AC-of the rectifier bridge BD1, a second input AC + of the rectifier bridge BD1 is connected to the neutral line N1 of the power interface, a first output + of the rectifier bridge BD1 is connected to the power module 20, and a second output-of the rectifier bridge BD1 is connected to ground.
In this embodiment, the overcurrent protection unit 11 may be a fuse FR, the rectification unit 12 may be a rectifier bridge BD1, and a filter capacitor may be connected in parallel to an output end of the rectifier bridge BD1 according to a user requirement, so as to filter the dc power output by the rectifier bridge BD 1.
In one embodiment, the color temperature selection module 40 is a first dial switch S1 circuit, and the first dial switch S1 circuit generates a corresponding color temperature selection signal according to the first dial signal to adjust the duty ratio of the plurality of color temperature adjustment signals.
In this embodiment, the first dial switch S1 circuit may be composed of a dial switch and a plurality of resistors with different resistances, and the corresponding resistor is selected by the dial switch to be connected to the power module 20, so as to implement color temperature selection, for example, the first dial switch S1 circuit is connected to a color temperature detection pin of the driver chip U1 in the power module 20, PWM signals with different duty ratios may be correspondingly output by setting different resistors, and then the brightness of multiple light emitting units in the light source module 60 is adjusted by the PWM signals with different duty ratios, so as to implement color temperature adjustment.
In one embodiment, referring to fig. 3, the power module 20 includes: the driving circuit comprises a first diode D1, a driving chip U1, a second capacitor C2, a third capacitor C3, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and a ninth resistor R9.
In this embodiment, the anode of the first diode D1, the first end of the fifth resistor R5 are commonly connected to the input module 10, the cathode of the first diode D1, the first end of the sixth resistor R6, the first end of the second capacitor C2 and the first end of the ninth resistor R9 are commonly connected to the light source module 60, the second end of the sixth resistor R6 is connected to the power supply pin HV of the driver chip U1, the second end of the fifth resistor R5 is connected to the scr bleeder pin IBLD of the driver chip U1, the power detection pin CLK of the driver chip U1 is connected to the power selection module 30, the color temperature detection pin RATIO of the driver chip U1 is connected to the color temperature selection module 40, the drain pin PVIN of the driver chip U1, the first end of the third capacitor C3, the first end of the second capacitor C2 and the first end of the ninth resistor R9 are commonly connected, the ground pin of the driver chip U1, the second end of the third capacitor C3 is grounded, and the maximum power sampling chip 3670 is connected to the maximum power sampling module 1, the first pwm signal pin G1 and the second pwm signal pin G2 of the driver chip U1 are connected to the color temperature control module 50.
In this embodiment, the fifth resistor R5 may form a leakage current (bleeding) circuit for being compatible with different silicon controlled dimmers, ac power input by the power interface enters the power module 20 after passing through the input module 1010, the power module 20 changes the resistance of the power detection pin raii 0 through the power selection module 30, each resistance is fed back to the driver chip U1 and may correspond to one voltage value, so as to generate a pulse width modulation signal corresponding to a duty ratio, and implement switching of different color temperatures. For example, in the relationship between the voltage value (resistance value) and the PWM signal in fig. 4, when the resistance value is 1k-1.5k, G1 will obtain the PWM signal with 5% duty cycle, G2 will obtain the PWM signal with 95% duty cycle, and so on.
In one embodiment, the power module 20 may adjust the resistance value of the power detection pin CLK through the power selection module 30, for example, by changing the resistance value of the power detection pin CLK by dialing or other methods, so as to change the internal reference voltage of the power module 20, and implement different current outputs, thereby implementing dimming.
The power selection module 30 and the color temperature selection module 40 are not limited to the mode of using only dial switches, and other measures are also applicable, as long as the resistance values of the color temperature detection pin RATIO and the power detection pin CLK can be changed, so that the dimming and color adjustment of the output end can be realized.
In a specific application, the power module 20 is not limited to linear, and other topologies of switching power supplies are also applicable.
In one embodiment, referring to fig. 3, the color temperature selection module 40 includes: a first toggle switch S1, a first resistor R1, a second resistor R2 and a third resistor R3.
The first end of the first resistor R1, the first end of the second resistor R2 and the first end of the third resistor R3 are respectively connected with three dial pins of the first dial switch S1 in a one-to-one correspondence mode, a common pin of the first dial switch S1 is connected with a color temperature detection pin RATIO of the driving chip U1, and the second end of the first resistor R1, the second end of the second resistor R2 and the second end of the third resistor R3 are connected to the ground in a shared mode.
In one embodiment, the power selection module 30 is a second toggle S2 circuit, and the second toggle S2 circuit generates a corresponding power selection signal according to the second toggle signal to control the internal reference voltage of the power module 20 and adjust the current of the light source driving signal.
In this embodiment, the second toggle switch S2 circuit may be composed of a toggle switch and a plurality of resistors with different resistances, and the corresponding resistor is selected by the toggle switch to be connected to the power module 20, so as to implement power selection, for example, the second toggle switch S2 circuit is connected to the power detection pin CLK of the driver chip U1 in the power module 20, different reference voltages inside the driver chip U1 may be changed by setting different resistors, and then the purpose of adjusting color temperature is implemented by outputting different currents.
In one embodiment, referring to fig. 3, the power selection module 30 includes a second toggle switch S2, a twelfth resistor R12, a thirteenth resistor R13, and a fourteenth resistor R14.
The first end of a twelfth resistor R12, the first end of a thirteenth resistor R13 and the first end of a fourteenth resistor R14 are respectively connected with three dial pins of the second dial switch S2 in a one-to-one correspondence manner, a common pin of the second dial switch S2 is connected with a power detection pin CLK of the driving chip U1, and the second end of the twelfth resistor R12, the second end of the thirteenth resistor R13 and the second end of the fourteenth resistor R14 are connected to the ground in a shared manner.
In one embodiment, the color temperature control module 50 includes a plurality of switch units, and the light source module 60 includes a plurality of light emitting units with different color temperatures; the plurality of switch units are respectively connected with the plurality of light-emitting units in series, the plurality of switch units are connected with the power module 20 and are used for respectively receiving the plurality of color temperature adjusting signals, and each switch unit is controlled to be switched on and off according to the corresponding color temperature adjusting signal.
In this embodiment, the plurality of switch units perform switch control by receiving a plurality of color temperature adjustment signals sent by the power module 20, where the color temperature adjustment signals may be pulse width modulation signals, and the power module 20 controls the brightness of each path of light emitting unit by outputting a plurality of color temperature adjustment signals with different duty ratios, so as to adjust the color temperature of the whole light source module 60.
In one embodiment, referring to fig. 3, the color temperature control module 50 includes a first switch unit 51 and a second switch unit 52, and the light source module 60 includes a first light emitting unit LED-W1 and a second light emitting unit LED-C1, wherein the first switch unit 51 is connected in series with the first light emitting unit LED-W1, and the second switch unit 52 is connected in series with the second light emitting unit LED-C1.
In one embodiment, the first light emitting unit LED-W1 may be a white light source, and the second light emitting unit LED-C1 may be a colored light source, such as a red light source, a green light source, a blue light source.
In one embodiment, referring to fig. 3, the first switch unit 51 includes a first switch Q1 and a tenth resistor R10, a first end of the first switch Q1 is connected to the first light emitting unit LED-W1, a control end of the first switch Q1 and a first end of the tenth resistor R10 are commonly connected to a first pwm signal pin G1 of the driver chip U1, a second end of the first switch Q1 and a second end of the tenth resistor R10 are commonly connected to a drain pin PVIN of the driver chip U1, and the drain pin PVIN of the driver chip U1 may be a drain pin of an internal power MOS thereof.
In one embodiment, the driver chip U1 may be a constant current driver chip.
In one embodiment, referring to fig. 3, the second switching unit 52 includes a second switching transistor Q2 and an eleventh resistor R11, a first end of the second switching transistor Q2 is connected to the second light emitting unit LED-C1, a control end of the second switching transistor Q2 and a first end of the eleventh resistor R11 are commonly connected to the second pwm signal pin G2 of the driving chip U1, a second end of the second switching transistor Q2 and a second end of the eleventh resistor R11 are commonly connected to the drain pin PVIN of the driving chip U1, and the drain pin PVIN of the driving chip U1 may be a drain pin of an internal power MOS thereof.
The above embodiment is an example of outputting two paths, and as with the above principle, the power module 20 can output N paths of signals, set different resistances through the maximum power setting module 70, can obtain different output currents, i.e., different luminances, and set different resistances of the color temperature selection module 40, can obtain different PWM signals (G1 → GN), thereby realizing different color temperatures.
Further, as shown in fig. 4, the horizontal axis (VRb) represents a voltage value, and the vertical axis represents a duty ratio of the PWM signal, in a similar manner, the power selection modules 30 with different resistances may adjust the magnitude of the output total current to achieve dimming, and the color temperature selection modules 40 with different resistances may distribute each path to obtain different current magnitudes to achieve analog color modulation, so that the entire lamp meets the requirement of no stroboscopic effect.
In one embodiment, the maximum power setting module 70 includes at least one adjustable resistor, a first end of the adjustable resistor is connected to the current sampling signal end of the power module 20, and a second end of the adjustable resistor is grounded; the power module 20 sets the threshold current according to the resistance of the adjustable resistor.
In this embodiment, the maximum power setting module 70 may adjust a resistance value of a current sampling signal end of the power module 20 through an adjustable resistor, specifically, the adjustable resistor is connected to a maximum current sampling pin of the driver chip U1, and the maximum power setting module 70 adjusts a resistance value of a maximum current sampling pin of the driver chip U1 in the power module 20 to adjust a threshold current of the power module 20, so as to implement setting of a maximum current of a light source driving signal.
In one embodiment, referring to fig. 3, the maximum power setting module 70 includes a seventh resistor R7 and an eighth resistor R8, first ends of the seventh resistor R7 and the eighth resistor R8 are commonly connected to the maximum current sampling pin VS of the driving chip U1, and second ends of the seventh resistor R7 and the eighth resistor R8 are grounded.
In one embodiment, at least one of the seventh resistor R7 and the eighth resistor R8 is an adjustable resistor.
An embodiment of the present application further provides a driving apparatus, including: a dimming/toning circuit as claimed in any one of the preceding claims.
An embodiment of the present application further provides a lamp, and the lamp includes: a light source module 60; and the dimming and toning circuit of any one of the above, the dimming and toning circuit is connected with the light source module 60.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. The utility model provides a mixing of colors circuit of adjusting luminance, is connected with the light source module, its characterized in that, the mixing of colors circuit of adjusting luminance includes:
the input module is connected with the power interface and used for receiving alternating current, rectifying and filtering the alternating current and outputting direct current;
the power supply module is connected with the input module and the light source module and used for generating a light source driving signal according to the direct current so as to drive the light source module to be lightened;
the power selection module and the power supply module are used for providing a power selection signal for the power supply module so as to adjust the brightness of the light source module;
the color temperature selection module is connected with the power supply module and used for providing a color temperature selection signal for the power supply module; the power supply module is also used for generating a plurality of color temperature adjusting signals according to the color temperature selection signals;
and the color temperature control module is connected with the power module and the light source module and used for adjusting the color temperature of the light source module according to the plurality of color temperature adjusting signals.
2. The dimming and toning circuit of claim 1, further comprising:
and the maximum power setting module is used for adjusting the threshold current of the power supply module so as to set the maximum current of the light source driving signal.
3. The dimming and toning circuit of claim 1, wherein the input module comprises:
the rectifying unit is used for rectifying the input alternating current;
and the filtering unit is used for filtering the direct current.
4. The dimming and toning circuit of claim 3, wherein the input module further comprises:
and the overcurrent protection unit is used for carrying out overcurrent protection on the input alternating current.
5. The dimming and toning circuit of claim 1, wherein the color temperature selection module is a first dial switch circuit, and the first dial switch circuit generates the corresponding color temperature selection signals according to a first dial signal to adjust duty ratios of a plurality of the color temperature adjustment signals.
6. The dimming and toning circuit of claim 1, wherein the power selection module is a second dial switch circuit, and the second dial switch circuit generates the corresponding power selection signal according to a second dial signal to control an internal reference voltage of the power supply module and adjust the current of the light source driving signal.
7. The dimming and toning circuit of claim 1, wherein the color temperature control module comprises a plurality of switch units, and the light source module comprises a plurality of light-emitting units with different color temperatures;
the plurality of switch units are respectively connected with the plurality of light-emitting units in series, the plurality of switch units are connected with the power module and used for respectively receiving the plurality of color temperature adjusting signals, and each switch unit is controlled to be switched on and off according to the corresponding color temperature adjusting signal.
8. The dimming and toning circuit of claim 2, wherein the maximum power setting module comprises at least one adjustable resistor, a first end of the adjustable resistor is connected with a current sampling signal end of the power supply module, and a second end of the adjustable resistor is grounded;
and the power supply module sets the threshold current according to the resistance value of the adjustable resistor.
9. A drive device, comprising: dimming and toning circuit as claimed in any one of claims 1 to 8.
10. A light fixture, the light fixture comprising: a light source module; and the dimming and toning circuit of any one of claims 1 to 8, which is connected with the light source module.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121565499.2U CN215773647U (en) | 2021-07-09 | 2021-07-09 | Light and color adjusting circuit, driving device and lamp |
| US17/861,898 US20230010921A1 (en) | 2021-07-09 | 2022-07-11 | Lighting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121565499.2U CN215773647U (en) | 2021-07-09 | 2021-07-09 | Light and color adjusting circuit, driving device and lamp |
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| Publication Number | Publication Date |
|---|---|
| CN215773647U true CN215773647U (en) | 2022-02-08 |
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| CN202121565499.2U Active CN215773647U (en) | 2021-07-09 | 2021-07-09 | Light and color adjusting circuit, driving device and lamp |
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| CN (1) | CN215773647U (en) |
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