Hand scanning induction dimming circuit and induction lamp

Abstract

The utility model provides a hand scanning induction dimming circuit and an induction lamp. The hand-sweeping induction dimming circuit comprises a main power supply circuit, a module power supply circuit, an ambient light sensor circuit, a first driving circuit and a second driving circuit, the main power supply circuit is electrically connected with the module power supply circuit, the first driving circuit and the second driving circuit, and meanwhile the module power supply circuit supplies power to the ambient light sensor circuit. The ambient light sensor circuit senses and recognizes a hand scanning action through a light sensor, and outputs a signal through a dimming single-chip microcomputer to control the on-off and brightness states of the two paths of LED lamp sets, so that the problem that an existing light sensing circuit can only control the on-off of the LED lamp sets and cannot realize dimming is solved; the hand-sweep induction dimming circuit can simultaneously or independently control the two groups of LED circuits, so that the hand-sweep induction dimming circuit adapts to various light application environments; as various light sensing components and sensors are arranged in the light sensor, the accuracy of sensing ambient light by the hand-sweeping sensing dimming circuit is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of lighting control, and in particular, to a hand-sweeping induction dimming circuit and an induction lamp. Background Art

[0002] With the development of LED technology, the demand for the intelligence of LED lamps is getting higher and higher. Various intelligent applications based on various wired and wireless protocols are becoming more and more widespread. The contactless hand-sweeping induction control methods for various panel applications, desktop table lamps, and vanity lights are becoming more and more popular. By sensing the hand-sweeping action, the state of the LED lamp can be controlled without touching various switches.

[0003] The hand-sweeping induction circuits in the prior art usually use discrete phototransistors, photoresistors or photodiodes to achieve induction control. Such circuits are relatively complex, have high discreteness, high power consumption, low sensitivity, and are easily affected by ambient light, which affects their induction accuracy. On the other hand, the existing hand-sweeping induction circuits are mainly used to control the on / off of the light alone and are not suitable for application scenarios with multiple lighting combinations.

[0004] For example, the comparative document CN202020496276.4 discloses a gesture-sensing LED lamp and its control circuit, including a housing and a gesture-sensing LED lamp control circuit; an LED installation groove is formed in the lower light-emitting chamber; mounting holes are formed on the top surface and the back surface of the housing, and an infrared sensing unit mounting port is provided on the front surface of the housing. The gesture-sensing LED lamp control circuit includes a power supply module, an LED load module, and a gesture-sensing control module; the power supply module is electrically connected to the LED load module and the gesture-sensing control module; the gesture-sensing control module includes an infrared sensing unit, a main control unit, and a switch unit; the infrared sensing unit collects gesture signals and sends the gesture signals to the main control unit; the main control unit generates a control signal sent to the switch unit according to the gesture signals; the switch unit is connected in series with the LED load module and controls the on / off and on / off frequency of the LED load module according to the control signal. However, this solution uses an infrared transceiver tube to achieve hand-sweeping induction control of the LED indicator light. The infrared transceiver tube is sensitive to light and is easily interfered under direct sunlight or strong artificial light sources, resulting in inaccurate hand-sweeping recognition and reducing the accuracy of the hand-sweeping induction circuit. And this solution can only control one LED lamp group and is difficult to meet the combined applications of multiple LED lamp groups in different scenarios. Summary of the Utility Model

[0005] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a hand-sweeping induction dimming circuit and an induction lamp that can accurately recognize hand-sweeping actions and control the brightness and switch states of multiple lights.

[0006] The purpose of the present disclosure is achieved by the following technical solutions:

[0007] A hand-sweeping induction dimming circuit, comprising a main power supply circuit, a module power supply circuit, an ambient light sensor circuit, a first driving circuit and a second driving circuit.

[0008] The main power supply circuit is used to supply power to the module power supply circuit, the first driving circuit and the second driving circuit respectively, and the module power supply circuit is used to supply power to the ambient light sensor circuit.

[0009] The ambient light sensor circuit includes a light sensor and a dimming single-chip microcomputer. The power input end of the light sensor and the power input end of the dimming single-chip microcomputer are both connected to the output end of the module power supply circuit. The light sensing signal output end of the light sensor is connected to the light sensing signal input end of the dimming single-chip microcomputer. The light sensing end of the light sensor is used to sense the external ambient light intensity during the hand-sweeping action.

[0010] The first driving circuit includes a dimming constant current chip and a first resistor. The power input end of the dimming constant current chip and the drain end of the MOS tube of the dimming constant current chip are both connected to the output end of the main power supply circuit. The first end of the first resistor is connected to the drain end of the MOS tube of the dimming constant current chip, and the second end of the first resistor is grounded. The PWM signal receiving end of the dimming constant current chip is connected to the first PWM signal output end of the dimming single-chip microcomputer to control the on-off of the output end of the dimming constant current chip.

[0011] The second driving circuit includes an electronic switch tube and a second resistor. The control end of the electronic switch tube is connected to the second PWM signal output end of the dimming single-chip microcomputer. The first end of the electronic switch tube is connected to the first end of the second resistor. The second end of the second resistor is used to be connected to the negative pole of the atmosphere lamp. The second end of the electronic switch tube is grounded. Among them, the output end of the main power supply circuit is also used to supply power to the main lamp and the atmosphere lamp respectively.

[0012] In one embodiment, the light sensing signal output end includes a first serial clock end and a first serial data end, the light sensing signal input end includes a second serial clock end and a second serial data end, the first serial clock end is connected to the second serial clock end, and the first serial data end is connected to the second serial data end.

[0013] In one embodiment, the ambient light sensor circuit further includes a third resistor and a fourth resistor. The first ends of the third resistor and the fourth resistor are both connected to the output end of the module power supply circuit. The second end of the third resistor is connected to the first serial clock end, and the second end of the fourth resistor is connected to the first serial data end.

[0014] In one embodiment, the second driving circuit includes a fifth resistor and a sixth resistor. A first end of the fifth resistor is connected to the second PWM signal output terminal, a second end of the fifth resistor is connected to a control end of the electronic switch tube, a first end of the sixth resistor is connected to the control end of the electronic switch tube, and a second end of the sixth resistor is grounded.

[0015] In one embodiment, the first driving circuit further includes a seventh resistor. The first PWM signal output terminal is connected to the PWM signal receiving terminal of the dimming constant current chip through the seventh resistor.

[0016] In one embodiment, the first driving circuit further includes an eighth resistor. A first end of the eighth resistor is connected to the short - circuit terminal of the dimming constant current chip, and a second end of the eighth resistor is connected to the ground terminal.

[0017] In one embodiment, the first driving circuit further includes a first inductor and a current - guiding diode. A first end of the first inductor is connected to the output terminal of the main power supply circuit, and a second end of the first inductor is connected to the positive pole of the main lamp through the current - guiding diode.

[0018] In one embodiment, the module power supply circuit further includes a linear voltage regulator. An input end of the linear voltage regulator is connected to the output terminal of the main power supply circuit, and an output end of the linear voltage regulator is connected to an input end of the ambient light sensor circuit.

[0019] In one embodiment, the main power supply circuit further includes a second inductor. A first end of the second inductor is connected to the power supply terminal of an external power supply, and a second end of the second inductor is connected to the output terminal of the main power supply circuit.

[0020] A motion - sensing lamp includes the hand - sweep motion - sensing dimming circuit according to any one of the above.

[0021] Compared with the prior art, the present disclosure has at least the following advantages:

[0022] 1. For the above - mentioned hand - sweep motion - sensing dimming circuit, the light sensor is used to sense the hand - sweep motion and identify the dwell time of the hand - sweep motion, then the sensing signal is converted into an electrical signal and output to the dimming single - chip microcomputer. The dimming single - chip microcomputer analyzes the signal output by the light sensor and then outputs a corresponding PWM control signal to the LED lamp group driving circuit, so as to control the brightness and switch state of the LED lamp group, thereby avoiding the problem that the traditional light - sensing components can only control the turning - off of the LED lamp group and cannot achieve dimming.

[0023] 2. Since the light sensor and the dimming single-chip microcomputer can control two groups of LED driving circuits simultaneously or independently, the hand-sweeping induction dimming circuit can meet various lighting application environments, thus improving the practicability of the hand-sweeping induction dimming circuit.

[0024] 3. Since the ambient light sensor is built-in with an optical filter and a proximity sensor, it can effectively suppress infrared light, accurately measure the ambient light intensity and detect the approach of an object, and its spectral response characteristics are close to those of the human eye. It is suitable for light measurement from a dark environment to direct sunlight, and has excellent performance in terms of induction angle response, dynamic range, linearity of the output signal and anti-interference. It can sense light changes under ambient light conditions of different color temperatures, making the hand-sweeping induction dimming circuit have higher accuracy compared with the induction circuit composed of traditional light-sensitive components. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of a hand-sweeping induction dimming circuit according to an embodiment;

[0027] Figure 2 is Figure 1 the circuit diagram of the main power supply circuit shown;

[0028] Figure 3 is Figure 1 the circuit diagram of the module power supply circuit shown;

[0029] Figure 4 is Figure 1 the circuit diagram of the ambient light sensing circuit shown;

[0030] Figure 5 is Figure 1 the circuit diagram of the first driving circuit shown;

[0031] Figure 6 is Figure 1 the circuit diagram of the second driving circuit shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] To facilitate the understanding of the present disclosure, the present disclosure will be described more comprehensively below with reference to the relevant accompanying drawings. Preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present disclosure can be understood more thoroughly and comprehensively.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this disclosure belongs. The terms used in the specification of this disclosure herein are only for the purpose of describing specific embodiments and are not intended to limit this disclosure. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0035] To better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure will be further described in detail below with specific embodiments:

[0036] As Figures 4 to 6 shown, the hand-sweeping induction dimming circuit 10 of an embodiment of the present disclosure includes a main power supply circuit 100, a module power supply circuit 200, an ambient light sensor circuit 300, a first driving circuit 400 and a second driving circuit 500.

[0037] The main power supply circuit 100 is used to supply power to the module power supply circuit 200, the first driving circuit 400 and the second driving circuit 500 respectively, and the module power supply circuit 200 is used to supply power to the ambient light sensor circuit 300.

[0038] Furthermore, the ambient light sensor circuit 300 includes a light sensor U4 and a dimming single-chip microcomputer U2. The power input terminals of the light sensor U4 and the dimming single-chip microcomputer U2 are both connected to the output terminal of the module power supply circuit. The light sensing signal output terminal of the light sensor U4 is connected to the light sensing signal input terminal of the dimming single-chip microcomputer U2. The light sensitive end of the light sensor U4 is used to sense the external ambient light intensity during the hand-sweeping action.

[0039] Further, the first driving circuit includes a dimming constant current chip U3 and a first resistor R7. The power input terminal of the dimming constant current chip U3 and the drain terminal D of the MOS transistor of the dimming constant current chip U3 are connected to the output terminal of the main power supply circuit. The first end of the first resistor R7 is connected to the drain terminal D of the MOS transistor of the dimming constant current chip U3, and the second end of the first resistor R7 is grounded. The PWM signal receiving terminal Dim of the dimming constant current chip U3 is connected to the first PWM signal output terminal PWM1 of the dimming single-chip microcomputer U2 to control the on-off of the output terminal cs of the dimming constant current chip U3. Its on-off will control the current direction of the output terminal of the main power supply circuit. That is, when the drain terminal D of the MOS transistor of the dimming constant current chip is turned on, the drain terminal D of the MOS transistor is turned on with the output terminal cs of the dimming constant current chip U3, so that the current forms a current loop from the output terminal of the main power supply circuit through the drain terminal D of the MOS transistor and the output terminal cs of the dimming constant current chip U3 to the ground terminal. The first driving circuit is used to control the switch and the brightness and darkness states of the main lamp.

[0040] Still further, the second driving circuit includes an electronic switch tube Q5 and a second resistor R10. The control terminal of the electronic switch tube Q5 is connected to the second PWM signal output terminal PWM2 of the dimming single-chip microcomputer U2. The first end of the electronic switch tube Q5 is connected to the first end of the second resistor R10. The second end of the second resistor R10 is used to be connected to the negative electrode of the atmosphere lamp. The second end of the electronic switch tube Q5 is grounded. The second driving circuit is used to control the switch and the brightness and darkness states of the atmosphere lamp.

[0041] In this embodiment, when the ambient light sensor circuit 300 is powered on for the first time, the light sensing signal output terminal of the light sensor U4 outputs an electrical signal to the dimming single-chip microcomputer U2. After the light sensing signal input terminal of the dimming single-chip microcomputer U2 receives the electrical signal output by the light sensor U4, the first PWM signal output terminal PWM1 outputs a high-level signal to the PWM signal receiving terminal Dim of the dimming constant current chip U3, so that the dimming constant current chip U3 is in a working state, so that the current can flow through the positive and negative electrodes of the main lamp and then form a current loop with the ground terminal, and then the main lamp is turned on; the second PWM signal output terminal PWM2 outputs a high-level signal to the control terminal of the electronic switch tube Q5 of the second driving circuit 500, so that the voltage of the control terminal of the electronic switch tube Q5 is greater than its threshold voltage, and the electronic switch tube Q5 is in a conducting state, so that the current passes through the positive and negative electrodes of the atmosphere lamp and then passes through the electronic switch tube Q5 and forms a current loop with the ground terminal, and then the main lamp and the atmosphere lamp are turned on. At the same time, the dimming single-chip microcomputer U2 records the output state of the current circuit.

[0042] Further, when the light-sensitive induction end first senses and recognizes a hand-sweeping action, the first PWM signal output terminal PWM1 continues to output a high-level signal to the PWM signal receiving terminal Dim of the dimming constant-current chip U3, so that the dimming constant-current chip U3 remains in a working state, thereby keeping the main light on; the second PWM signal output terminal PWM2 outputs a low-level signal to the control terminal of the electronic switch tube Q5 of the second driving circuit 500, so that the voltage at the control terminal of the electronic switch tube Q5 is less than its threshold voltage, and the electronic switch tube Q5 is in a cut-off state, so that current cannot form a current loop through the electronic switch tube Q5, and further the main light is turned on and the atmosphere light is turned off.

[0043] When the light-sensitive induction end secondarily senses and recognizes a hand-sweeping action, the first PWM signal output terminal PWM1 outputs a low-level signal to the PWM signal receiving terminal Dim of the dimming constant-current chip U3, so that the dimming constant-current chip U3 is in a stopped state, so that current can no longer flow through the positive pole of the main light, and further the main light is turned off; the second PWM signal output terminal PWM2 outputs a high-level signal to the control terminal of the electronic switch tube Q5 of the second driving circuit 500, so that the voltage at the control terminal of the electronic switch tube Q5 is greater than its threshold voltage, and the electronic switch tube Q5 is in a conducting state, so that after the current passes through the positive and negative poles of the atmosphere light, it then passes through the electronic switch tube Q5 and forms a current loop with the grounding terminal, and further the main light is turned off and the atmosphere light is turned on.

[0044] When the light-sensitive induction end thirdly senses and recognizes a hand-sweeping action, the first PWM signal output terminal PWM1 continues to output a low-level signal to the PWM signal receiving terminal Dim of the dimming constant-current chip U3, so that the main light remains off; the second PWM signal output terminal PWM2 outputs a low-level signal to the control terminal of the electronic switch tube Q5 of the second driving circuit 500, so that the voltage at the control terminal of the electronic switch tube Q5 is less than its threshold voltage, and the electronic switch tube Q5 is in a cut-off state, so that current cannot form a current loop through the electronic switch tube Q5, and further both the main light and the atmosphere light are in an off state.

[0045] Furthermore, when the light-sensitive induction end senses and recognizes a hand-sweeping action and the time of continuously blocking the light-sensitive induction end is greater than or equal to two seconds, the dimming single-chip microcomputer U2 receives the electrical signal of the light-sensing signal output terminal and adjusts the duty ratios of the signals output by the first PWM signal output terminal PWM1 and the second PWM signal output terminal PWM2, so that the duty ratios of the first PWM signal and the second PWM signal output by the dimming single-chip microcomputer U2 gradually decrease from 100% to 0%.

[0046] When the main light and the ambient light are both on, if you keep scanning, as the duty cycle of the first PWM signal and the second PWM signal decreases, the current flowing through the main light and the ambient light gradually decreases, so that the brightness of the main light and the ambient light gradually dims until the duty cycle of the PWM signal is 0%, and the main light and the ambient light are turned off. At this time, continue to block the light-sensitive sensing end, the duty cycle of the first PWM signal and the second PWM signal output by the dimming microcontroller U2 will gradually increase from 0% to 100%, and the current flowing through the main light and the ambient light will gradually increase. The brightness of the main light and the ambient light will gradually become brighter as the duty cycle of the first PWM signal and the second PWM signal increases, until the duty cycle of the PWM signal is 100%, and the main light and the ambient light are in the brightest state.

[0047] When the main light is on but the ambient light is off, the dimming microcontroller U2 only adjusts the duty cycle of the output first PWM signal, and the brightness of the main light will change with the increase or decrease of the duty cycle of the first PWM signal. When the main light is off but the ambient light is on, the dimming microcontroller U2 only adjusts the duty cycle of the output second PWM signal, and the brightness of the ambient light will change with the increase or decrease of the duty cycle of the second PWM signal. When both the main light and the ambient light are off, if the light-sensitive terminal is continuously blocked, the brightness of the main light and the ambient light will not be adjusted.

[0048] The above-mentioned hand-sweep sensing dimming circuit 10 senses the hand-sweep action and identifies the dwell time of the hand-sweep action through the light sensor U4, and then converts the sensing signal into an electrical signal and outputs it to the dimming microcontroller U2. The dimming microcontroller U2 analyzes the signal output by the light sensor U4, and then outputs the corresponding PWM control signal to the LED light group drive circuit, thereby controlling the brightness and switch state of the LED light group, thereby avoiding the problem that traditional light sensing components can only control the LED light group to turn off but cannot achieve dimming. Since the light sensor U4 and the dimming microcontroller U2 can control two groups of LED drive circuits simultaneously or independently, the hand-sweep sensing dimming circuit 10 can meet a variety of lighting application environments, thereby improving the practicality of the hand-sweep sensing dimming circuit 10. Since the ambient light sensor U4 has a built-in optical filter and a proximity sensor, it can effectively suppress infrared light, accurately measure the ambient light intensity and detect the approach of objects, and its spectral response characteristics are close to those of the human eye. It is suitable for light measurement from dark environments to direct sunlight, and has excellent performance in sensing angle response, dynamic range, linearity of output signals and anti-interference. It can sense light changes under ambient light conditions of different color temperatures, making the hand-scanning sensing dimming circuit 10 more accurate than the sensing circuit composed of traditional photosensitive components.

[0049] In another embodiment, the electronic switch tube Q5 is an N-type MOS tube. The control end of the electronic switch tube Q5 is the gate of the N-type MOS tube, the first end of the electronic switch tube Q5 is the drain of the N-type MOS tube, and the second end of the electronic switch tube Q5 is the source of the N-type MOS tube.

[0050] As Figure 4 shown, in one embodiment, the light sensing signal output terminal includes a first serial clock terminal and a first serial data terminal, and the light sensing signal input terminal includes a second serial clock terminal and a second serial data terminal. The first serial clock terminal is connected to the second serial clock terminal, and the first serial data terminal is connected to the second serial data terminal. In this embodiment, the dimming single-chip microcomputer U2 sends a clock signal through the second serial clock terminal and transmits it to the first serial clock terminal of the light sensor U4, so that the dimming single-chip microcomputer can control the data transmission rate and synchronization of the first serial data terminal of the light sensor U4, thereby ensuring that the data of the light sensor U4 is correctly transmitted to the dimming single-chip microcomputer U2 through the second serial data terminal through the first serial data terminal. Furthermore, the dimming single-chip microcomputer can timely and accurately obtain the data after the light sensor U4 senses the ambient light, and output a corresponding PWM signal according to the data.

[0051] As Figure 4 shown, in one embodiment, the ambient light sensor circuit 300 further includes a third resistor R18 and a fourth resistor R19. The first ends of the third resistor R18 and the fourth resistor R19 are both connected to the output terminal of the module power supply circuit 200. The second end of the third resistor R18 is connected to the first serial clock terminal, and the second end of the fourth resistor R19 is connected to the first serial data terminal. In this embodiment, since the first serial clock terminal and the first serial data terminal need to maintain a high level when the light sensor U4 is in the standby state, to prevent the first serial clock terminal and the first serial data terminal from being in a high-impedance state in the standby state, and avoid the problems of unstable and failed communication between the light sensor U4 and the dimming single-chip microcomputer U2. The third resistor R18 and the fourth resistor R19 respectively serve as pull-up resistors for the first serial clock terminal and the first serial data terminal, so that the first serial clock terminal and the first serial data terminal maintain a stable high level, thereby enabling the light sensor U4 to convert the detected light intensity change into an electrical signal and transmit it to the dimming single-chip microcomputer U2, and further improving the stability of the ambient light sensor circuit 300.

[0052] As Figure 6As shown, in one embodiment, the second driving circuit 500 includes a fifth resistor R2 and a sixth resistor R12. The first end of the fifth resistor R2 is connected to the second PWM signal output terminal PWM2, the second end of the fifth resistor R2 is connected to the control end of the electronic switching tube Q5, the first end of the sixth resistor R12 is connected to the control end of the electronic switching tube Q5, and the second end of the sixth resistor R12 is grounded. In this embodiment, the second PWM signal output terminal PWM2 is connected to the control end of the electronic switching tube Q5 through the fifth resistor R2. The fifth resistor R2 limits the current flowing through the control end of the electronic switching tube Q5, preventing the current flowing through the control end of the electronic switching tube Q5 from being too large, thereby ensuring the normal operation of the electronic switching tube Q5. Since the control end of the electronic switching tube Q5 is grounded through the sixth resistor R12, the sixth resistor R12 can ensure that the control end of the electronic switching tube Q5 remains in a stable low-level state before obtaining a high-level signal, thereby preventing voltage fluctuations at the control end of the electronic switching tube Q5, and further improving the stability of the second driving circuit 500.

[0053] As Figure 5 shown, in one embodiment, the first driving circuit 400 further includes a seventh resistor R5. The first PWM signal output terminal PWM1 is connected to the PWM signal receiving terminal Dim of the dimming constant current chip U3 through the seventh resistor R5. In this embodiment, since the seventh resistor R5 is connected between the first PWM signal output terminal PWM1 and the PWM signal receiving terminal Dim of the dimming constant current chip U3, the seventh resistor R5 limits the current flowing through the PWM signal receiving terminal Dim of the dimming constant current chip U3, preventing the current flowing through the PWM signal receiving terminal Dim from being too large, thereby ensuring the normal operation of the dimming constant current chip U3.

[0054] As Figure 5 shown, in one embodiment, the first driving circuit 400 further includes an eighth resistor Rcs1. The first end of the eighth resistor Rcs1 is connected to the output terminal cs of the dimming constant current chip U3, and the second end of the eighth resistor Rcs1 is grounded. In this embodiment, since the eighth resistor Rcs1 is connected between the output terminal cs of the dimming constant current chip U3 and the ground terminal, the eighth resistor Rcs1 limits the current flowing through the output terminal cs of the dimming constant current chip U3, preventing the current flowing through the output terminal cs of the dimming constant current chip U3 from being too large, thereby ensuring the normal operation of the dimming constant current chip U3.

[0055] As Figure 5As shown, in one embodiment, the first driving circuit 400 further includes a first inductor L2 and a current guiding diode D1. The first end of the first inductor L2 is connected to the output end of the main power supply circuit 100, and the second end of the first inductor L2 is connected to the positive electrode of the main lamp through the current guiding diode D1. In this embodiment, since the inductor converts electrical energy into magnetic energy and stores it inside the inductor when passing through current, when the drain terminal D of the MOS transistor of the dimming constant current chip U3 is in the conducting state, the current passes through the first inductor L2 and then returns to the negative electrode of the power supply through the internal circuit of the dimming single-chip microcomputer U2. At the same time, the first inductor L2 converts electrical energy into magnetic energy and stores it inside the first inductor L2. When the drain terminal D of the MOS transistor of the dimming constant current chip U3 is in the cut-off state, the first inductor L2 converts the stored magnetic energy into electrical energy and releases it into the circuit, so that the voltage at the output end of the main power supply circuit 100 and the voltage released by the first inductor L2 are jointly loaded onto the positive electrode of the main lamp through the current guiding diode D1, thereby enabling the first driving circuit 400 to obtain sufficient voltage to drive the main lamp to maintain its brightness, and further improving the stability of the hand-sweeping induction dimming circuit 10.

[0056] As Figure 3 shown, in one embodiment, the module power supply circuit 200 further includes a linear voltage regulator U1. The input end of the linear voltage regulator U1 is connected to the output end of the main power supply circuit 100, and the output end of the linear voltage regulator U1 is connected to the input end of the ambient light sensor circuit 300. In this embodiment, since there is a reference voltage source inside the linear voltage regulator U1, which provides a stable reference voltage and serves as the reference for the output voltage of the linear voltage regulator U1, the output voltage of the linear voltage regulator U1 is compared with the reference voltage source through a feedback loop, and then the difference between these two voltages is amplified by the internal error amplifier to form an error voltage and used as a control signal to control the conduction time and state of the transistor inside the linear voltage regulator U1, so that the linear voltage regulator U1 can output a specific voltage. Thus, the 24V voltage at the input end of the main power supply circuit 100 can output a stable 3.3V DC voltage after passing through the linear voltage regulator U1, and is loaded onto the power input ends of the light sensor U4 and the dimming single-chip microcomputer U2 through the output end of the linear voltage regulator U1, so that the light sensor U4 and the dimming single-chip microcomputer U2 can maintain normal operation.

[0057] As Figure 2As shown, in one embodiment, the main power supply circuit 100 further includes a second inductor L1. The first end of the second inductor L1 is connected to the power supply terminal of the external power supply, and the second end of the second inductor L1 is connected to the output terminal of the main power supply circuit 100. In this embodiment, since the two ends of the second inductor L1 are respectively connected to the power supply terminal of the external power supply and the output terminal of the main power supply circuit 100, the second inductor L1 plays a stabilizing role on the output terminal of the main power supply circuit 100, so that after the current input from the power supply terminal of the external power supply passes through the second inductor L1, the current can be stably output from the output terminal of the main power supply circuit 100, thereby ensuring that the hand-sweeping induction dimming circuit 10 can work properly.

[0058] An induction lamp includes the hand-sweeping induction dimming circuit 10 of any one of the above. In this embodiment, when the ambient light sensor circuit 300 is powered on for the first time, the light sensing signal output terminal of the light sensor U4 outputs an electrical signal to the dimming single-chip microcomputer U2. After the light sensing signal input terminal of the dimming single-chip microcomputer U2 receives the electrical signal output by the light sensor U4, the first PWM signal output terminal PWM1 outputs a high-level signal to the PWM signal receiving terminal Dim of the first driving circuit 400, so that the MOS tube drain terminal D of the dimming constant current chip U3 is in a cut-off state, so that current can flow through the positive and negative electrodes of the main lamp and form a current loop with the grounding terminal, and then the main lamp is turned on; the second PWM signal output terminal PWM2 outputs a high-level signal to the control terminal of the electronic switch tube Q5 of the second driving circuit 500, so that the voltage at the control terminal of the electronic switch tube Q5 is greater than its threshold voltage, and the electronic switch tube Q5 is in a conducting state, so that after the current passes through the positive and negative electrodes of the atmosphere lamp, it passes through the electronic switch tube Q5 and forms a current loop with the grounding terminal, and then the main lamp and the atmosphere lamp are turned on, and at the same time the dimming single-chip microcomputer U2 records the output state of the current circuit. Further, when the photosensitive sensing end senses and recognizes the hand-sweeping action for the first time, the first PWM signal output terminal PWM1 outputs a high-level signal to the PWM signal receiving terminal Dim of the first driving circuit 400, so that the MOS tube drain terminal D of the dimming constant current chip U3 remains in a cut-off state, so that the main lamp remains on; the second PWM signal output terminal PWM2 outputs a low-level signal to the control terminal of the electronic switch tube Q5 of the second driving circuit 500, so that the voltage at the control terminal of the electronic switch tube Q5 is less than its threshold voltage, and the electronic switch tube Q5 is in a cut-off state, so that current cannot form a current loop through the electronic switch tube Q5, and then the main lamp is turned on and the atmosphere lamp is turned off. When the photosensitive sensing end senses and recognizes the hand-sweeping action for the second time, the first PWM signal output terminal PWM1 outputs a low-level signal to the PWM signal receiving terminal Dim of the first driving circuit 400, so that the MOS tube drain terminal D of the dimming constant current chip U3 is in a conducting state, so that current can no longer flow through the positive electrode of the main lamp, and then the main lamp is turned off; the second PWM signal output terminal PWM2 outputs a high-level signal to the control terminal of the electronic switch tube Q5 of the second driving circuit 500, so that the voltage at the control terminal of the electronic switch tube Q5 is greater than its threshold voltage, and the electronic switch tube Q5 is in a conducting state, so that after the current passes through the positive and negative electrodes of the atmosphere lamp, it passes through the electronic switch tube Q5 and forms a current loop with the grounding terminal, and then the main lamp is turned off and the atmosphere lamp is turned on.When the photosensitive induction end senses and recognizes the hand-sweeping action for the third time, the first PWM signal output terminal PWM1 outputs a low-level signal to the PWM signal receiving terminal Dim of the first driving circuit 400, so that the main lamp remains in the off state; the second PWM signal output terminal PWM2 outputs a low-level signal to the control terminal of the electronic switch tube Q5 of the second driving circuit 500, so that the voltage at the control terminal of the electronic switch tube Q5 is less than its threshold voltage, and the electronic switch tube Q5 is in the cut-off state, so that the current cannot form a current loop through the electronic switch tube Q5, and further the main lamp and the atmosphere lamp are both in the off state. Further, when the photosensitive induction end senses and recognizes the hand-sweeping action, and the time of continuously blocking the photosensitive induction end is greater than or equal to two seconds, the dimming single-chip microcomputer U2 receives the electrical signal at the optical signal output terminal and adjusts the duty cycles of the signals output by the first PWM signal output terminal PWM1 and the second PWM signal output terminal PWM2, so that the duty cycles of the first PWM signal and the second PWM signal output by the dimming single-chip microcomputer U2 gradually decrease from 100% to 0%. When the main lamp and the atmosphere lamp are both in the on state, if the hand-sweeping action is maintained, as the duty cycles of the first PWM signal and the second PWM signal decrease, the current flowing through the main lamp and the atmosphere lamp gradually decreases, so that the brightness of the main lamp and the atmosphere lamp gradually dims until the duty cycle of the PWM signal is 0%, and the main lamp and the atmosphere lamp go out. At this time, if the photosensitive induction end continues to be blocked, the duty cycles of the first PWM signal and the second PWM signal output by the dimming single-chip microcomputer U2 will gradually increase from 0% to 100%, and at the same time the current flowing through the main lamp and the atmosphere lamp gradually increases, and the brightness of the main lamp and the atmosphere lamp will gradually brighten as the duty cycles of the first PWM signal and the second PWM signal increase until the duty cycle of the PWM signal is 100%, and the main lamp and the atmosphere lamp are in the brightest state. When the main lamp is on but the atmosphere lamp is off, the dimming single-chip microcomputer U2 only adjusts the duty cycle of the output first PWM signal, and the brightness of the main lamp will change with the rise and fall of the duty cycle of the first PWM signal. When the main lamp is off but the atmosphere lamp is on, the dimming single-chip microcomputer U2 only adjusts the duty cycle of the output second PWM signal, and the brightness of the atmosphere lamp will change with the rise and fall of the duty cycle of the second PWM signal. When the main lamp and the atmosphere lamp are both in the off state, if the photosensitive induction end is continuously blocked, the brightness of the main lamp and the atmosphere lamp will not be adjusted.

[0059] Compared with the prior art, the present disclosure has at least the following advantages:

[0060] 1. The above-mentioned hand-sweeping sensing dimming circuit 10 senses the hand-sweeping action and identifies the dwell time of the hand-sweeping action through the light sensor U4, and then converts the sensing signal into an electrical signal and outputs it to the dimming microcontroller U2. The dimming microcontroller U2 analyzes the signal output by the light sensor U4, and then outputs the corresponding PWM control signal to the LED lamp group driving circuit, thereby controlling the brightness and switching state of the LED lamp group, thereby avoiding the problem that traditional light-sensing components can only control the LED lamp group to shut down but cannot achieve dimming.

[0061] 2. Since the light sensor U4 and the dimming microcontroller U2 can control two sets of LED driving circuits simultaneously or independently, the hand-sweeping sensing dimming circuit 10 can meet a variety of lighting application environments, thereby improving the practicality of the hand-sweeping sensing dimming circuit 10.

[0062] 3. Since the ambient light sensor U4 has a built-in optical filter and a proximity sensor, it can effectively suppress infrared light, accurately measure the ambient light intensity and detect the approach of objects, and its spectral response characteristics are close to those of the human eye. It is suitable for light measurement from dark environments to direct sunlight, and has excellent performance in sensing angle response, dynamic range, linearity of output signals and anti-interference. It can sense light changes under ambient light conditions of different color temperatures, making the hand-scanning sensing dimming circuit 10 more accurate than the sensing circuit composed of traditional photosensitive components.

[0063] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A hand-sweep sensing dimming circuit, characterized in that: It includes a main power supply circuit, a module power supply circuit, an ambient light sensor circuit, a first drive circuit and a second drive circuit; The main power supply circuit is used to supply power to the module power supply circuit, the first drive circuit and the second drive circuit respectively, and the module power supply circuit is used to supply power to the ambient light sensor circuit; The ambient light sensor circuit includes a light sensor and a dimming microcontroller, the power input end of the light sensor and the power input end of the dimming microcontroller are both connected to the output end of the module power supply circuit, the light-sensing signal output end of the light sensor is connected to the light-sensing signal input end of the dimming microcontroller, and the light-sensing end of the light sensor is used to sense the external ambient light intensity during the hand-sweeping action; The first driving circuit includes a dimming constant current chip and a first resistor, the power input end of the dimming constant current chip and the MOS tube drain end of the dimming constant current chip are connected to the output end of the main power supply circuit, the first end of the first resistor is connected to the MOS tube drain end of the dimming constant current chip, the second end of the first resistor is grounded, and the PWM signal receiving end of the dimming constant current chip is connected to the first PWM signal output end of the dimming microcontroller to control the on and off of the output end of the dimming constant current chip; The second driving circuit includes an electronic switch tube and a second resistor, the control end of the electronic switch tube is connected to the second PWM signal output end of the dimming microcontroller, the first end of the electronic switch tube is connected to the first end of the second resistor, the second end of the second resistor is used to be connected to the negative pole of the atmosphere lamp, and the second end of the electronic switch tube is grounded, wherein the output end of the main power supply circuit is also used to power the main lamp and the atmosphere lamp respectively.

2. The hand-sweep sensing dimming circuit according to claim 1, characterized in that: The light-sensing signal output end includes a first serial clock end and a first serial data end, and the light-sensing signal input end includes a second serial clock end and a second serial data end, the first serial clock end is connected to the second serial clock end, and the first serial data end is connected to the second serial data end.

3. The hand-sweep sensing dimming circuit according to claim 2, characterized in that: The ambient light sensor circuit also includes a third resistor and a fourth resistor, the first end of the third resistor and the first end of the fourth resistor are both connected to the output end of the module power supply circuit, the second end of the third resistor is connected to the first serial clock end, and the second end of the fourth resistor is connected to the first serial data end.

4. The hand-sweep sensing dimming circuit according to claim 1, characterized in that: The second driving circuit includes a fifth resistor and a sixth resistor, wherein a first end of the fifth resistor is connected to the second PWM signal output end, a second end of the fifth resistor is connected to the control end of the electronic switch tube, a first end of the sixth resistor is connected to the control end of the electronic switch tube, and a second end of the sixth resistor is grounded.

5. The hand-sweep sensing dimming circuit according to claim 1, characterized in that: The first driving circuit also includes a seventh resistor, and the first PWM signal output end is connected to the PWM signal receiving end of the dimming constant current chip through the seventh resistor.

6. The hand-sweep sensing dimming circuit according to claim 5, characterized in that: The first driving circuit further includes an eighth resistor, a first end of the eighth resistor is connected to the short-circuit end of the dimming constant current chip, and a second end of the eighth resistor is connected to the ground end.

7. The hand-sweep sensing dimming circuit according to claim 5, characterized in that: The first driving circuit further includes a first inductor and a conducting diode. The first end of the first inductor is connected to the output end of the main power supply circuit, and the second end of the first inductor is connected to the positive electrode of the main lamp through the conducting diode.

8. The hand-sweep sensing dimming circuit according to claim 1, characterized in that: The module power supply circuit further includes a linear regulator, an input end of the linear regulator is connected to an output end of the main power supply circuit, and an output end of the linear regulator is connected to an input end of the ambient light sensor circuit.

9. The hand-sweep sensing dimming circuit according to claim 1, characterized in that: The main power supply circuit further includes a second inductor, a first end of the second inductor is connected to a power supply end of an external power source, and a second end of the second inductor is connected to an output end of the main power supply circuit.

10. An induction lamp, characterized in that: It comprises the hand-sweep sensing dimming circuit as claimed in any one of claims 1 to 9.

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