CN214799958U

CN214799958U - Dimming and color mixing control circuit and intelligent lamp

Info

Publication number: CN214799958U
Application number: CN202120384193.0U
Authority: CN
Inventors: 苏文坤; 黄仕海; 蒋洪奎
Original assignee: Leedarson Lighting Co Ltd
Current assignee: Leedarson Lighting Co Ltd; Zhangzhou Lidaxin Optoelectronic Technology Co ltd
Priority date: 2021-02-21
Filing date: 2021-02-21
Publication date: 2021-11-19
Anticipated expiration: 2031-02-21

Abstract

This application is applicable to lamps and lanterns control technical field, provides a mixing of colors control circuit and intelligent lamps and lanterns adjust luminance, and it includes to adjust luminance mixing of colors control circuit: the device comprises an alternating current-to-direct current unit, a dimming and toning unit, a power supply unit, a main control unit, a first capacitor and a second capacitor; the first capacitor is connected between the power input end of the dimming and toning unit and the ground, and the second capacitor is connected between the power input end of the power unit and the ground; the power supply unit is used for performing voltage conversion processing on a direct current signal output by the alternating current-to-direct current unit and supplying power to the main control unit; the dimming and color-mixing unit is used for adjusting the brightness and/or the color temperature of the lamp string according to the dimming and color-mixing control signal provided by the main control unit, wherein the power input end of the dimming and color-mixing unit, the power input end of the power unit and the positive power end of the lamp string are connected with the power output end of the AC-to-DC unit, so that the lamp strings with different color temperatures can be turned off simultaneously.

Description

Dimming and color mixing control circuit and intelligent lamp

Technical Field

The application belongs to the technical field of lamp control, and particularly relates to a dimming and color mixing control circuit and an intelligent lamp.

Background

Along with the rapid development of intelligent lamps, more and more functions that intelligent lamps and lanterns can realize, for example, many current intelligent lamps and lanterns can both realize the function of adjustable luminance mixing of colors. Wherein, the light adjusting means adjusts the brightness of the light string; color matching refers to adjusting the color temperature of a string of lights, and may also be understood as adjusting the color of a string of lights.

As shown in fig. 1, the conventional dimming and toning control circuit generally includes: the dimming and color-mixing device comprises an AC-DC unit for supplying power to the dimming and color-mixing unit and the lamp string, a power supply unit for performing voltage conversion on an electric signal output by the AC-DC unit and supplying power to the main control unit, and a dimming and color-mixing unit for adjusting the brightness and/or the color temperature of the lamp string according to a dimming and color-mixing control signal provided by the main control unit. The principle of the toning control of the dimming toning unit is generally as follows: when the main control unit outputs a low-level color-mixing control signal, the heating light string is controlled to be lightened; when the main control unit outputs a high-level color mixing control signal, the light strings are controlled to be lightened, and when the main control unit outputs a medium-level color mixing control signal, the light strings of two color temperatures are controlled to be lightened. Generally, in order to ensure the normal operation of the circuit, a first capacitor C1 is disposed between the power input terminal of the dimming and toning unit and the ground, a second capacitor C2 is disposed between the power input terminal of the power unit and the ground, and a diode D is disposed between the power output terminal of the ac-to-dc unit and the power input terminal of the dimming and toning unit in order to prevent the current from flowing backwards. However, since the capacitance of the first capacitor C1 is usually much larger than that of the second capacitor C2, after the circuit is powered off, the discharge time of the first capacitor C1 is longer than that of the second capacitor C2, that is, when the second capacitor C2 has been discharged and no control signal is output to the dimming and toning unit from the main control unit, the first capacitor C1 will continue to discharge to the dimming and toning unit and the string, and at this time, the dimming and toning unit will default to the main control unit to output a low level signal, and perform toning control on the string of lights with corresponding color temperatures according to the low level signal, instead of directly turning off the string of lights with different color temperatures, so that the strings of lights with different color temperatures cannot be turned off at the same time.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the present application provides a dimming and color-mixing control circuit and an intelligent lamp, so as to solve the technical problem that the existing dimming and color-mixing control circuit causes that strings of lights with different color temperatures cannot be turned off simultaneously.

In a first aspect, an embodiment of the present application provides a dimming and color-mixing control circuit, which is used for connecting a lamp string, and the dimming and color-mixing control circuit includes: the device comprises an alternating current-to-direct current unit, a dimming and toning unit, a power supply unit, a main control unit, a first capacitor and a second capacitor; the first capacitor is connected between the power input end of the dimming and toning unit and the ground, and the second capacitor is connected between the power input end of the power unit and the ground; the alternating current-to-direct current unit is used for supplying power to the dimming and color mixing unit and the lamp string, the power supply unit is used for performing voltage conversion processing on a direct current signal output by the alternating current-to-direct current unit and supplying power to the main control unit, the main control unit is used for providing a dimming and color mixing control signal for the dimming and color mixing unit, and the dimming and color mixing unit is used for adjusting the brightness and/or the color temperature of the lamp string according to the dimming and color mixing control signal; and the power supply input end of the dimming and color mixing unit, the power supply input end of the power supply unit and the positive power supply end of the lamp string are connected with the power supply output end of the AC-to-DC unit.

Optionally, the dimming and color-adjusting control circuit further includes a first diode; the anode of the first diode is connected with the power output end of the alternating current-to-direct current unit, and the cathode of the first diode is connected with the power input end of the power unit.

Optionally, the dimming and toning unit includes: a dimming subunit and a toning subunit; the lamp string comprises a cold light lamp string and a warm light lamp string;

the power input end of the color adjusting subunit and the power input end of the color adjusting subunit are both the power input ends of the color adjusting and adjusting unit, the output end of the color adjusting subunit is connected with the color adjusting subunit, the first output end of the color adjusting subunit is connected with the cathode of the cold light lamp string, the second output end of the color adjusting subunit is connected with the cathode of the warm light lamp string, the anode of the cold light lamp string and the anode of the warm light lamp string are connected in common, the common joint is the positive power source end of the lamp string, the controlled end of the color adjusting subunit is connected with the first control end of the main control unit, and the controlled end of the color adjusting subunit is connected with the second control end of the main control unit;

the dimming subunit is used for adjusting the brightness of the lamp string according to the dimming control signal output by the main control unit;

the color mixing subunit is used for adjusting the color temperature of the light string according to the color mixing control signal output by the main control unit.

Optionally, the dimming subunit includes: the dimming control circuit comprises a third resistor, a third capacitor, a fourth resistor, a dimming control chip, a fifth resistor, a sixth resistor, a seventh resistor, a fourth capacitor, a second diode, a second inductor, a fifth capacitor and an eighth resistor;

the high-voltage starting pin of the dimming control chip, the first end of the seventh resistor, the cathode of the second diode, the first end of the fifth capacitor and the first end of the eighth resistor are connected in common, and the common junction is the power input end of the dimming subunit, the second end of the seventh resistor is connected with the first end of the fourth capacitor, the second end of the fourth capacitor, the output driving pin of the dimming control chip, the anode of the second diode and the first end of the second inductor are connected in common, the second end of the second inductor, the second end of the fifth capacitor and the second end of the eighth resistor are connected in common, and the common junction is the output end of the dimming subunit, the overvoltage protection pin of the dimming control chip is connected with the first end of the third resistor, the pulse width modulation signal input pin of the dimming control chip, the first end of the third capacitor and the first end of the fourth resistor are connected in common, and the common junction is the controlled power input end of the dimming subunit And the current sampling signal input pin of the dimming control chip, the first end of the fifth resistor and the first end of the sixth resistor are connected in common, and the second end of the third resistor, the second end of the third capacitor, the second end of the fourth resistor, the ground pin of the dimming control chip, the second end of the fifth resistor and the second end of the sixth resistor are all grounded.

Optionally, the color matching subunit includes: a ninth resistor, a tenth resistor, an eleventh resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a color modulation control chip, a twelfth resistor and a thirteenth resistor;

a first end of the ninth resistor and a first end of the eleventh resistor are connected in common, a common connection point is a power input end of the color mixing subunit, a second end of the ninth resistor is connected with a first end of the tenth resistor, a second end of the tenth resistor, a first end of the sixth capacitor and a power pin of the color mixing control chip are connected in common, a second end of the eleventh resistor, a first end of the seventh capacitor and a high potential pin of the color mixing control chip are connected in common, a second end of the first capacitor, a second end of the eighth capacitor and a low potential pin of the color mixing control chip are connected in common, a common connection point is connected with an output end of the color mixing subunit, a first control pin of the color mixing control chip is a first output end of the color mixing subunit, a second control pin of the color mixing control chip is a second output end of the color mixing subunit, the pulse width modulation signal input pin of the color modulation control chip is connected with the first end of the thirteenth resistor, the second end of the thirteenth resistor and the first end of the twelfth resistor are connected in common, the common joint is the controlled end of the color modulation subunit, and the second end of the sixth capacitor, the second end of the eighth capacitor, the ground pin of the color modulation control chip and the second end of the twelfth resistor are all grounded.

Optionally, the power supply unit includes: a fourteenth resistor, a fifteenth resistor, a constant voltage chip, a third diode, a ninth capacitor, a third inductor, a fourth diode, a tenth capacitor and a sixteenth resistor;

the voltage starting pin of the constant voltage chip is the power input end of the power supply unit, the current sampling signal input pin of the constant voltage chip, the first end of the fourteenth resistor and the first end of the fifteenth resistor are connected in common, the second end of the fourteenth resistor, the second end of the fifteenth resistor, the ground pin of the constant voltage chip, the second end of the ninth capacitor, the cathode of the fourth diode and the first end of the third inductor are connected in common, the power pin of the constant voltage chip, the first end of the ninth capacitor and the cathode of the third diode are connected in common, the anode of the third diode, the second end of the third inductor, the first end of the tenth capacitor and the first end of the sixteenth resistor are connected in common, the common connection point is the power output pin of the power supply unit, the anode of the fourth diode, the second end of the tenth capacitor and the second end of the sixteenth resistor are all grounded, a second end of the sixteenth resistor is a ground end of the power supply unit.

Optionally, the main control unit includes a main control chip;

the power supply pin of the main control chip is connected with the power supply output pin of the power supply unit, the ground pin of the main control chip is connected with the ground end of the power supply unit, the first pulse width modulation signal output pin of the main control chip is connected with the controlled end of the dimming subunit, and the second pulse width modulation signal output pin of the main control chip is connected with the controlled end of the dimming subunit.

Optionally, the main control chip further includes a wireless communication pin, and the main control unit further includes a first antenna; the wireless communication leg is connected with the first antenna.

Optionally, the ac-dc conversion unit includes: the circuit comprises a fuse, a first resistor, a first inductor, a second resistor, an eleventh capacitor and a rectifier bridge;

the first end of the fuse is used for being connected with a positive output end of an alternating current power supply, the second end of the fuse, the first end of the second resistor, the first end of the eleventh capacitor and a positive input end of the rectifier bridge are connected in common, the second end of the second resistor, the second end of the eleventh capacitor and a negative input end of the rectifier bridge are connected in common, a common point is used for being connected with a negative output end of the alternating current power supply, the positive output end of the rectifier bridge, the second end of the first resistor and the second end of the first inductor are connected in common, the first end of the first resistor and the first end of the first inductor are connected in common, the common point is a power supply output end of the alternating current-to-direct current unit, and the negative output end of the rectifier bridge is grounded.

In a second aspect, an embodiment of the present application provides an intelligent lamp, which includes a lamp string and a dimming and color-adjusting control circuit as described in the first aspect or any optional manner of the first aspect.

The dimming and color mixing control circuit and the intelligent lamp provided by the embodiment of the application have the following beneficial effects:

the dimming and toning control circuit provided by the embodiment of the application, because the power input end of the dimming and toning unit, the power input end of the power supply unit and the positive power end of the lamp string are directly connected with the power output end of the alternating-current-to-direct-current unit, after the dimming and toning control circuit is powered off, the first capacitor releases electric energy to the dimming and toning unit and the lamp string and simultaneously releases the electric energy, thus the power-off time of the dimming and toning unit and the lamp string can be ensured to be consistent with the power-off time of the main control unit, or the power-off time of the dimming and toning unit and the lamp string is ensured to be earlier than the power-off time of the main control unit, namely the dimming and toning unit stops working when no control signal is output to the dimming and toning unit by the main control unit, and the lamp string with different color temperatures can be simultaneously turned off.

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 based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a conventional dimming and toning control circuit provided in the prior art;

fig. 2 is a schematic structural diagram of a dimming and toning control circuit according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a dimming and toning control circuit according to another embodiment of the present application;

fig. 4 is a schematic circuit diagram of a dimming and toning control circuit according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an intelligent lamp provided in an embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It should be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items. Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.

It should also be appreciated that reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a dimming and toning control circuit according to an embodiment of the present disclosure. As shown in fig. 2, the dimming and color-adjusting control circuit 100 is used for connecting a light string 200, and the dimming and color-adjusting control circuit 100 includes: an ac-to-dc unit 11, a dimming and toning unit 12, a power supply unit 13, a main control unit 14, a first capacitor C1 and a second capacitor C2. Wherein, the first capacitor C1 is connected between the power input terminal of the dimming and toning unit 12 and the ground, and the second capacitor C2 is connected between the power input terminal of the power unit 13 and the ground; the ac-to-dc conversion unit 11 is configured to supply power to the dimming and color-mixing unit 12 and the light string 200, the power supply unit 13 is configured to perform voltage conversion processing on a dc electrical signal output by the ac-to-dc conversion unit 11 and supply power to the main control unit 14, the main control unit 14 is configured to provide a dimming and color-mixing control signal to the dimming and color-mixing unit 12, and the dimming and color-mixing unit 12 is configured to adjust brightness and/or color temperature of the light string 200 according to the dimming and color-mixing control signal. The power input end of the dimming and color-adjusting unit 12, the power input end of the power unit 13 and the positive power end of the light string 200 are connected with the power output end of the ac-to-dc unit 11.

In this embodiment, the ac-dc conversion unit 11 is specifically configured to connect to an ac power supply, perform rectification and filtering on an ac electrical signal output by the ac power supply, and output a dc electrical signal through a power output end of the ac electrical signal.

The power supply unit 13 is specifically configured to convert a voltage of the dc signal output by the ac-to-dc unit 11 into a voltage required by the operation of the main control unit 14, and supply power to the main control unit 14, so that the main control unit 14 can operate normally.

The first capacitor C1 and the second capacitor C2 both have the function of filtering and storing electric energy. By way of example and not limitation, the first capacitor C1 and the second capacitor C2 may each be electrolytic capacitors. In a specific application, the capacitance of the first capacitor C1 is greater than the capacitance of the second capacitor C2.

In this embodiment, the main control unit 14 is specifically configured to receive the brightness adjustment instruction and/or the color temperature adjustment instruction, and generate the dimming control signal according to the brightness adjustment instruction, or generate the color modulation control signal according to the color temperature adjustment instruction, and send the generated dimming control signal and/or color modulation control signal to the dimming and color modulation unit 12.

In a specific application, the dimming control signal and the toning control signal may be both Pulse Width Modulation (PWM) signals. Wherein, different dimming control signals and color modulation control signals can be represented by PWM signals with different duty ratios.

In an embodiment of the present application, the brightness adjustment instruction and/or the color temperature adjustment instruction may be sent to the main control unit 14 by the terminal device through a wireless communication manner. Wherein, the terminal device includes but is not limited to: a mobile phone, a tablet computer or a remote controller, etc.

In another embodiment of the present application, the brightness adjustment instruction and/or the color temperature adjustment instruction may also be sent to the main control unit 14 by a control panel connected to the main control unit 14. Specifically, a brightness adjusting button and a color temperature adjusting button can be arranged on the control panel, the control panel generates a brightness adjusting instruction when the brightness adjusting button is detected to be triggered, and the control panel generates a color temperature adjusting instruction when the color temperature adjusting button is detected to be triggered.

It can be seen from the above that, in the dimming and toning control circuit provided in the embodiment of the present application, the power input end of the dimming and toning unit, the power input end of the power supply unit, and the positive power end of the string lights are all directly connected to the power output end of the ac-to-dc conversion unit, and therefore, after the dimming and toning control circuit is powered off, the first capacitor releases electric energy to the dimming and toning unit and the string lights while releasing electric energy, so that it can be ensured that the power-off time of the dimming and toning unit and the string lights is consistent with the power-off time of the main control unit, or the power-off time of the dimming and toning unit and the string lights is earlier than the power-off time of the main control unit, that is, the dimming and toning unit stops working when the main control unit does not output a control signal to the dimming and toning unit, and thus the string lights of different color temperatures can be turned off simultaneously.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a dimming and toning control circuit according to another embodiment of the present application. As shown in fig. 3, relative to the embodiment shown in fig. 2, the dimming/toning control circuit 100 in this embodiment further includes a first diode D1, an anode of the first diode D1 is connected to the power output terminal of the ac-dc unit 11, and a cathode of the first diode D1 is connected to the power input terminal of the power unit 13.

In this embodiment, the first diode D1 is disposed between the power output end of the ac-to-dc unit 11 and the power input end of the power unit 13, so that current can only flow from the power output end of the ac-to-dc unit 11 to the power input end of the power unit 13, and thus the current at the power input end of the power unit 13 can be prevented from flowing back to the ac-to-dc unit 11.

Referring to fig. 3, in another embodiment of the present application, the dimming and toning unit 12 specifically includes: a dimming subunit 121 and a toning subunit 122; light string 200 specifically includes a cold light string 21 and a warm light string 22.

The power input end of the light adjusting subunit 121 and the power input end of the color adjusting subunit 122 are connected in common, and the common junction is the power input end of the light adjusting and color adjusting unit 12, the output end of the light adjusting subunit 121 is connected with the color adjusting subunit 122, the first output end of the color adjusting subunit 122 is connected with the cathode of the cold light lamp string 21, the second output end of the color adjusting subunit 122 is connected with the cathode of the warm light lamp string 22, the anode of the cold light lamp string 21 and the anode of the warm light lamp string 22 are connected in common, and the common junction is the positive power supply end of the lamp string 200, the controlled end of the light adjusting subunit 121 is connected with the first control end of the main control unit 14, and the controlled end of the color adjusting subunit 122 is connected with the second control end of the main control unit 14.

Specifically, the dimming sub-unit 121 is configured to adjust the brightness of the light string 200 according to the dimming control signal output by the main control unit 14.

The color-adjusting sub-unit 122 is used for adjusting the color temperature of the light string 200 according to the color-adjusting control signal output by the main control unit 14.

In this embodiment, the dimming subunit 121 may implement brightness adjustment from 1% to 100% for the cold light string 21 and/or the warm light string 22 according to the duty ratio of the dimming control signal.

By way of example and not limitation, when the color-adjusting control signal received by the color-adjusting subunit 122 is a first level signal, the color-adjusting subunit 122 may control a light string (e.g., the cold light string 21) to light up; when the color-adjusting control signal received by the color-adjusting subunit 122 is the second level signal, the color-adjusting subunit 122 may control another light string (for example, the warm light string 22) to light up; when the color-mixing control signal received by the color-mixing subunit 122 is the third level signal, the color-mixing subunit 122 can control the two light strings (the cold light string 21 and the warm light string 22) to be simultaneously lighted, thereby realizing the color temperature adjustment of the light string 200.

Wherein, the potential value of the first level signal, the potential value of the second level signal and the potential value of the third level signal are different. The potential value of the first level signal, the potential value of the second level signal, and the potential value of the third level signal may be set according to time requirements, and are not limited herein.

In a specific application, the cold light string 21 and the warm light string 22 may be formed by connecting a plurality of Light Emitting Diodes (LEDs) in series. The anode of the first LED in the plurality of LEDs connected in series is the anode of the cold light string 21 or the warm light string 22, and the cathode of the last LED in the plurality of LEDs connected in series is the cathode of the cold light string 21 or the warm light string 22.

Referring to fig. 4, fig. 4 is a schematic circuit diagram of a dimming and toning control circuit according to an embodiment of the present disclosure. As shown in fig. 4, in the present embodiment, the dimming subunit 121 specifically includes: the dimming control circuit comprises a third resistor R3, a third capacitor C3, a fourth resistor R4, a dimming control chip U1, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a fourth capacitor C4, a second diode D2, a second inductor L2, a fifth capacitor C5 and an eighth resistor R8.

Wherein, the high voltage starting pin HV of the dimming control chip U1, the first end of the seventh resistor R7, the cathode of the second diode D2, the first end of the fifth capacitor C5 and the first end of the eighth resistor R8 are commonly connected and the common junction is the power input terminal of the dimming subunit 121, the second end of the seventh resistor R7 is connected with the first end of the fourth capacitor C4, the second end of the fourth capacitor C4, the output driving pin DRAIN of the dimming control chip U1, the anode of the second diode D2 and the first end of the second inductor L2 are commonly connected, the second end of the second inductor L2, the second end of the fifth capacitor C5 and the second end of the eighth resistor R8 are commonly connected and the common junction is the output terminal of the dimming subunit 121, the overvoltage protection pin OVP of the dimming control chip U1 is connected with the first end of the third resistor R8, the pulse width modulation signal input pin 3 of the dimming control chip U1, the first end of the third capacitor R3 and the first end of the PWM resistor R4 are commonly connected and the common junction of the dimming subunit 121, the current sampling signal input pin CS of the dimming control chip U1, the first end of the fifth resistor R5, and the first end of the sixth resistor R6 are connected in common, and the second end of the third resistor R3, the second end of the third capacitor C3, the second end of the fourth resistor R4, the ground pin GND of the dimming control chip U1, the second end of the fifth resistor R5, and the second end of the sixth resistor R6 are all grounded.

In this embodiment, the specific type of the dimming control chip U1 can be determined according to actual requirements, and is not limited herein.

In a specific application, the fifth capacitor C5 may be an electrolytic capacitor, the first terminal of the fifth capacitor C5 is the positive terminal of the fifth capacitor C5, and the second terminal of the fifth capacitor C5 is the negative terminal of the fifth capacitor C5.

Referring to fig. 4, in another embodiment of the present application, the color matching subunit 122 specifically includes: a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a sixth capacitor C6, a seventh capacitor C7, a seventh capacitor C8, a toning control chip U2 and a twelfth resistor R12.

Wherein, the first terminal of the ninth resistor R9 and the first terminal of the eleventh resistor R11 are connected in common, and the common node is the power input terminal of the color adjusting subunit 122, the second terminal of the ninth resistor R9 is connected with the first terminal of the tenth resistor R10, the second terminal of the tenth resistor R10, the first terminal of the sixth capacitor C6 and the power pin VCC of the color adjusting control chip U2 are connected in common, the second terminal of the eleventh resistor R11, the first terminal of the seventh capacitor C7 and the high-potential pin VH of the color adjusting control chip U2 are connected in common, the second terminal of the first capacitor C8 and the low-potential pin VS of the color adjusting control chip U2 are connected in common, and the common node is connected with the output terminal of the color adjusting subunit 122, the first control pin D1 of the color adjusting control chip U2 is the first output terminal of the color adjusting subunit 122, the second control pin D2 of the color adjusting control chip U2 is the second output terminal of the color adjusting subunit 122, the pulse width modulation control pin U2 is connected with the first terminal of the PWM chip R13, the second terminal of the thirteenth resistor R13 and the first terminal of the twelfth resistor R12 are connected in common, the common connection point is the controlled terminal of the color tuning sub-unit 122, and the second terminal of the sixth capacitor C6, the second terminal of the seventh capacitor C8, the ground GND of the color tuning control chip U2, and the second terminal of the twelfth resistor R12 are all grounded.

In this embodiment, the specific model of the toning control chip U2 may be determined according to actual requirements, and is not limited herein.

Referring to fig. 4, in another embodiment of the present application, the power unit 13 specifically includes: a fourteenth resistor R14, a fifteenth resistor R15, a constant voltage chip U3, a third diode D3, a ninth capacitor C9, a third inductor L3, a fourth diode D4, a tenth capacitor C10, and a sixteenth resistor R16.

Wherein, the voltage start pin DRAIN of the constant voltage chip U3 is a power input terminal of the power unit 13, the current sampling signal input pin CS of the constant voltage chip U3, the first terminal of the fourteenth resistor R14 and the first terminal of the fifteenth resistor R15 are commonly connected, the second terminal of the fourteenth resistor R14, the second terminal of the fifteenth resistor R15, the ground pin GND of the constant voltage chip U3, the second terminal of the ninth capacitor C9, the cathode of the fourth diode D4 and the first terminal of the third inductor L3 are commonly connected, the power pin VCC of the constant voltage chip U3, the first terminal of the ninth capacitor C9 and the cathode of the third diode D3 are commonly connected, the anode of the third diode D3, the second terminal of the third inductor L3, the first terminal of the tenth capacitor C10 and the first terminal of the sixteenth resistor R16 are commonly connected and the common connection point is a power output pin of the power unit 13, the anode of the fourth diode D4, the second terminal of the tenth capacitor C10 and the sixteenth resistor R16 are all grounded, the second terminal of the sixteenth resistor R16 is the ground terminal of the power supply unit 13.

In this embodiment, the voltage start pin DRAIN of the constant voltage chip U3 is a DRAIN of a high voltage Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET) inside the constant voltage chip U3.

By way of example and not limitation, the constant voltage chip U3 may be embodied as a buck chip. The specific type of the voltage reduction chip can be determined according to actual requirements, and the voltage reduction chip is not limited too much.

In a specific application, the tenth capacitor C10 may be an electrolytic capacitor, the first terminal of the tenth capacitor C10 is the positive terminal of the tenth capacitor C10, and the second terminal of the tenth capacitor C10 is the negative terminal of the tenth capacitor C10.

Referring to fig. 4, in another embodiment of the present application, the main control unit 14 specifically includes a main control chip U4.

The power pin VCC of the main control chip U4 is connected to the power output pin of the power supply unit 13, the ground pin GND of the main control chip U4 is connected to the ground terminal of the power supply unit 13, the first pulse width modulation signal output pin PWM1 of the main control chip U4 is connected to the controlled terminal of the dimming subunit 121, and the second pulse width modulation signal output pin PWM2 of the main control chip U4 is connected to the controlled terminal of the dimming subunit 122.

In a specific application, the main control chip U4 may be a Central Processing Unit (CPU) or a Micro Controller Unit (MCU).

With continued reference to fig. 4, in another embodiment of the present application, the main control chip U4 further includes a wireless communication pin RF, and the main control unit 14 further includes a first antenna ANT. The main control chip U4 is connected to the first antenna ANT via the wireless communication pin RF.

In this embodiment, the main control chip U4 may receive a dimming instruction and/or a color adjusting instruction sent by the terminal device in a wireless communication manner, so that remote dimming and/or color adjusting for the light string may be implemented, thereby facilitating a user to control the light string.

Referring to fig. 4, in another embodiment of the present application, the ac-dc converting unit 11 specifically includes: fuse FR1, first resistor R1, first inductor L1, second resistor R2, eleventh capacitor C11 and rectifier bridge BD 1.

The first end of the fuse FR1 is used for connecting a positive output end of an ac power supply, the second end of the fuse FR1, the first end of the second resistor R2, the first end of the eleventh capacitor C11 and the positive input end of the rectifier bridge BD1 are connected in common, the second end of the second resistor R2, the second end of the eleventh capacitor C11 and the negative input end of the rectifier bridge BD1 are connected in common, and a common junction point is used for connecting a negative output end of the ac power supply, the positive output end of the rectifier bridge BD1, the second end of the first resistor R1 and the second end of the first inductor L1 are connected in common, the first end of the first resistor R1 and the first end of the first inductor L1 are connected in common, and the common junction point is a power supply output end of the ac-to-dc unit 11, and the negative output end of the rectifier bridge 1 is grounded.

In a specific application, the second resistor R2 may be a voltage dependent resistor for performing overvoltage protection on the rectifier bridge BD 1.

The following describes the specific operation principle of the dimming and toning control circuit 100 provided in this embodiment in detail with reference to fig. 4:

as shown in fig. 4, after the dimming and color-adjusting control circuit 100 is powered on, the rectifier bridge BD1 rectifies the received ac signal and outputs a first dc signal, the filter circuit composed of the first resistor R1 and the first inductor L1 filters the first dc signal output by the rectifier bridge BD1, the filtered first dc signal directly supplies power to the dimming control chip U1, the color-adjusting control chip U2, and the light string 200, the filtered first dc signal also supplies power to the power unit 13 through the first diode D1, and the constant voltage chip U3 in the power unit 13 steps down the voltage of the first dc signal and outputs the voltage required for the main control chip U4 to enable the main control chip U4 to normally operate.

When the main control chip U4 receives the dimming command, the main control chip U4 may output a PWM dimming control signal with a corresponding duty ratio to the dimming control chip U1 through the first pulse width modulation signal output pin PWM1, and the dimming control chip U1 controls the current flowing through the string light 200 according to the duty ratio of the PWM dimming control signal, thereby implementing the dimming control of the string light 200. The larger the duty ratio of the PWM dimming control signal is, the larger the current controlled by the dimming control chip U1 through the string 200 is, and the brighter the string 200 is.

When the main control chip U4 receives the color modulation command, the main control chip U4 may output a corresponding color modulation control signal to the color modulation control chip U2 through the second pulse width modulation signal output pin PWM2, and the color modulation control chip U2 controls the light string with a corresponding color temperature to be turned on or off according to the color modulation control signal. By way of example and not limitation, when the color-mixing control signal is a first level signal, the main control chip U4 may output a low level signal through its first control pin D1 and output a high level signal through its second control pin D2, so as to control the cold light string 21 to light up and the warm light string 22 to extinguish, so that the string 200 presents cold light; when the color-mixing control signal is a second level signal, the main control chip U4 can output a high level signal through the first control pin D1 and output a low level signal through the second control pin D2, so as to control the cold light string 21 to be extinguished and the warm light string 22 to be lit, so that the string 200 presents warm light; when the color-mixing control signal is the third level signal, the main control chip U4 can output low level signals through the first control pin D1 and the second control pin D2, and further control the cold light string 21 and the warm light string 22 to be lighted, so that the light string 200 presents the light of the cold-warm clock, thereby realizing the color temperature adjustment of the light string 200.

When the dimming and toning control circuit 100 is powered off (i.e. the ac power supply stops supplying power to the dimming and toning control circuit 100), the first capacitor C1 simultaneously releases power to the dimming control chip U1, the toning control chip U2, the lamp string 200 and the constant voltage chip U3, when the power stored in the first capacitor C1 is completely released, the dimming control chip U1, the toning control chip U2, the lamp string 200 and the constant voltage chip U3 are powered off simultaneously, so that the power-off time of the dimming control chip U1, the toning control chip U2 and the lamp string 200 is consistent with the power-off time of the main control chip U4, or the power-off time of the dimming control chip U1, the toning control chip U2 and the lamp string 200 is earlier than the power-off time of the main control chip U4, and when the main control chip U4 is powered off, no control signal (for default, i.e. a low level signal) is output to the dimming control chip U1 or the toning control chip U2, and the anode of the cold light string 21 and the anode of the warm light string 22 both have no electrical signal input at this time, so that the cold light string 21 and the warm light string 22 can be turned off simultaneously when the electrical energy stored in the first capacitor C1 is completely released.

The embodiment of the application further provides an intelligent lamp. Referring to fig. 5, fig. 5 is a schematic structural diagram of an intelligent lamp according to an embodiment of the present disclosure. As shown in fig. 5, the intelligent lamp includes a string of lights 200 and the dimming and color-adjusting control circuit 100 in each embodiment corresponding to fig. 2 to 4.

The specific structure and the operation principle of the dimming and toning control circuit 100 may refer to the related descriptions in the embodiments corresponding to fig. 2 to fig. 4, and are not described herein again.

It is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing functional units and modules are merely illustrated as examples, and in practical applications, the foregoing function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the dimming and toning control circuit is divided into different functional units or modules to perform all or part of the above-described functions. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the description of each embodiment has its own emphasis, and parts that are not described or illustrated in a certain embodiment may refer to the description of other embodiments.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

1. A light and color adjusting control circuit is used for connecting a lamp string and comprises: the device comprises an alternating current-to-direct current unit, a dimming and toning unit, a power supply unit, a main control unit, a first capacitor and a second capacitor; the first capacitor is connected between the power input end of the dimming and toning unit and the ground, and the second capacitor is connected between the power input end of the power unit and the ground; the alternating current-to-direct current unit is used for supplying power to the dimming and color mixing unit and the lamp string, the power supply unit is used for performing voltage conversion processing on a direct current signal output by the alternating current-to-direct current unit and supplying power to the main control unit, the main control unit is used for providing a dimming and color mixing control signal for the dimming and color mixing unit, and the dimming and color mixing unit is used for adjusting the brightness and/or the color temperature of the lamp string according to the dimming and color mixing control signal; the dimming and color-adjusting device is characterized in that a power supply input end of the dimming and color-adjusting unit, a power supply input end of the power supply unit and a positive power supply end of the lamp string are connected with a power supply output end of the AC-to-DC unit.

2. The dimming and toning control circuit of claim 1, further comprising a first diode; the anode of the first diode is connected with the power output end of the alternating current-to-direct current unit, and the cathode of the first diode is connected with the power input end of the power unit.

3. The dimming and toning control circuit according to claim 1 or 2, wherein the dimming and toning unit comprises: a dimming subunit and a toning subunit; the light string comprises: a cold light string and a warm light string;

4. The dimming and toning control circuit of claim 3, wherein the dimming sub-unit comprises: the dimming control circuit comprises a third resistor, a third capacitor, a fourth resistor, a dimming control chip, a fifth resistor, a sixth resistor, a seventh resistor, a fourth capacitor, a second diode, a second inductor, a fifth capacitor and an eighth resistor;

5. The dimming and toning control circuit of claim 3, wherein the toning subunit comprises: a ninth resistor, a tenth resistor, an eleventh resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a color modulation control chip, a twelfth resistor and a thirteenth resistor;

6. The dimming and toning control circuit according to claim 1 or 2, wherein the power supply unit includes: a fourteenth resistor, a fifteenth resistor, a constant voltage chip, a third diode, a ninth capacitor, a third inductor, a fourth diode, a tenth capacitor and a sixteenth resistor;

7. The dimming and toning control circuit of claim 3, wherein the main control unit comprises a main control chip;

8. The dimming and toning control circuit of claim 7, wherein the main control chip further comprises a wireless communication pin, and the main control unit further comprises a first antenna; the wireless communication leg is connected with the first antenna.

9. The dimming and toning control circuit of claim 1 or 2, wherein the AC-to-DC unit comprises: the circuit comprises a fuse, a first resistor, a first inductor, a second resistor, an eleventh capacitor and a rectifier bridge;

10. An intelligent lamp, comprising a string of lights and the dimming and color-adjusting control circuit according to any one of claims 1 to 9.