Dimming glass driving circuit

Abstract

The utility model discloses a dimming glass driving circuit, which comprises a solar power supply module, a voltage conversion module, a driving module, a control module and an interface module, the output end of the solar power supply module is connected with the input end of the voltage conversion module, the first output end of the voltage conversion module is connected with the power end of the driving module, and the second output end of the voltage conversion module is connected with the power end of the control module; the driving output end of the driving module is used for providing driving voltage for the dimming glass, the controlled end of the driving module is connected with the control end of the control module, and the signal transmission end of the control module is connected with the interface module. The dimming glass driving circuit can utilize solar energy to supply power to the dimming glass.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid crystal film technical field especially relates to a light control glass drive circuit. BACKGROUND

[0002] With the improvement of people's living standards, the application of light control glass is increasingly widespread. For example, in the scenes of automobile, high-end office building, residence, shopping mall, etc., the figure of light control glass can be seen. However, the existing light control glass generally uses commercial power as the power supply, so it is easy to appear the inconvenient power supply situation for the beach sunlight room, mountain top sunlight room, etc. far away from the urban area. SUMMARY

[0003] The main purpose of the utility model is to provide a light control glass drive circuit, which aims to realize the solar power supply of light control glass.

[0004] In order to achieve the above purpose, the utility model provides a light control glass drive circuit, which comprises a solar power supply module, a voltage conversion module, a drive module, a control module and an interface module. The output end of the solar power supply module is connected with the input end of the voltage conversion module. The first output end of the voltage conversion module is connected with the power supply end of the drive module. The second output end of the voltage conversion module is connected with the power supply end of the control module. The drive output end of the drive module is used for providing driving voltage for light control glass. The controlled end of the drive module is connected with the control end of the control module. The signal transmission end of the control module is connected with the interface module.

[0005] Preferably, the solar power supply module comprises a solar power supply circuit, a battery charging circuit, an energy storage battery and a voltage stabilizing diode D2. The output end of the solar power supply circuit is connected with the input end of the battery charging circuit. The output end of the battery charging circuit is connected with the input end of the energy storage battery. The output end of the energy storage battery is connected with the anode of the voltage stabilizing diode D2. The cathode of the voltage stabilizing diode D2 is the output end of the solar power supply module. The solar power supply circuit is used for converting solar energy into electric energy and charging the energy storage battery through the battery charging circuit.

[0006] Preferably, the solar power supply circuit comprises a female seat, a voltage stabilizing diode D3 and a capacitor C6. The first end of the female seat is connected with the anode of the voltage stabilizing diode D3. The cathode of the voltage stabilizing diode D3 is connected with the first end of the capacitor C6. The connection node is the output end of the solar power supply circuit. The second end of the female seat and the second end of the capacitor C6 are grounded.

[0007] Preferably, the battery charging circuit comprises a charging management chip, a resistor R1, a resistor R2, a resistor R3, a resistor R5, a resistor RS1, a capacitor C1, a capacitor C2, a capacitor C4, a capacitor C7, a capacitor C8, an inductor L1 and a first indicator lamp; a first end of the resistor R3, an IN pin of the charging management chip, a positive electrode of the capacitor C4 and a positive electrode of the first indicator lamp are interconnected, and a connection node thereof is an input end of the battery charging circuit; a second end of the resistor R3 is connected with an EN pin of the charging management chip; a TEMP pin of the charging management chip is connected with a first end of the resistor R1; a CHRG pin of the charging management chip is connected with a first end of the resistor R2; a second end of the resistor R2 is connected with a negative electrode of the first indicator lamp; a SW pin of the charging management chip, a first end of the inductor L1, a second end of the capacitor C7 and a first end of the resistor R5 are interconnected; a first end of the capacitor C7 is connected with a BS pin of the charging management chip; a second end of the resistor R5 is connected with a first end of the capacitor C8; a second end of the inductor L2 is connected with a first end of the resistor RS1; a second end of the resistor RS1, a positive electrode of the capacitor C1 and a first end of the capacitor C2 are interconnected, and a connection node thereof is an output end of the battery charging circuit; a negative electrode of the capacitor C4, an EP pin of the charging management chip, a second end of the capacitor C8, a second end of the resistor R1, a second end of the capacitor C1 and a second end of the capacitor C2 are grounded.

[0008] Preferably, the voltage conversion module comprises a boost circuit and a voltage stabilizing circuit; an input end of the boost circuit is connected with an input end of the voltage stabilizing circuit, and a connection node thereof is an input end of the voltage conversion module; an output end of the boost circuit is a first output end of the voltage conversion module; and an output end of the voltage stabilizing circuit is a second output end of the voltage conversion module.

[0009] Preferably, the boost circuit comprises a boost chip, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R18, a capacitor C16, a capacitor C17, a capacitor C18, a capacitor C19, an inductor L2, a voltage stabilizing diode D4, a transistor Q1, a transistor Q2; a first end of the resistor R9 is connected with an emitter of the transistor Q1, a connection node thereof is an input end of the boost circuit, a second end of the resistor R9, a base of the transistor Q1 and a first end of the resistor R11 are interconnected, a second end of the resistor R11 is connected with a collector of the transistor Q2, a base of the transistor Q2, a first end of the resistor R18 and a second end of the resistor R13 are interconnected, a first end of the resistor R13 is used for receiving a power saving control signal; a second end of the inductor L2, an anode of the voltage stabilizing diode D4 and a SW pin of the boost chip are interconnected, a FB pin of the boost chip, a second end of the resistor R15 and a first end of the resistor R16 are interconnected, a VIN pin of the boost chip and a second end of the resistor R14 are connected with a VCC power supply, an EN pin of the boost chip is connected with a first end of the resistor R14, a cathode of the voltage stabilizing diode D4, a first end of the capacitor C16, a first end of the capacitor C17 and a first end of the resistor R10 are interconnected, a connection node thereof is an output end of the boost circuit; a second end of the resistor R10 and a first end of the resistor R12 are connected, a connection node thereof is an output voltage detection point, a second end of the resistor R18, an emitter of the transistor Q2, a second end of the capacitor C18, a second end of the capacitor C19, a first end of the resistor R15, a GND pin of the boost chip, a second end of the capacitor C16, a second end of the capacitor C17 and a second end of the resistor R12 are all grounded.

[0010] Preferably, the voltage stabilizing circuit comprises a capacitor C10, a capacitor C11, a capacitor C12 and a voltage stabilizing chip, a first end of the capacitor C10 is connected with an IN pin of the voltage stabilizing chip, a connection node thereof is an input end of the voltage stabilizing circuit, an OUT pin of the voltage stabilizing chip, a first end of the capacitor C11 and a first end of the capacitor C12 are interconnected, a connection node thereof is an output end of the voltage stabilizing circuit, a second end of the capacitor C10, a GND pin of the voltage stabilizing chip, a second end of the capacitor C11 and a second end of the capacitor C12 are all grounded.

[0011] Preferably, the driving module comprises a driving chip, a resistor R19, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a transistor Q3 and a transistor Q4; a first end of the resistor R19 is connected with an emitter of the transistor Q3, a connection node thereof is a power supply end of the driving module, a second end of the resistor R19, a first end of the resistor R23 and a base of the transistor Q3 are interconnected, a second end of the resistor R23 is connected with a collector of the transistor Q4, a base of the transistor Q4, a first end of the resistor R25 and a second end of the resistor R24 are interconnected, and a first end of the resistor R24 is a controlled end of the driving module; a collector of the transistor Q3, a first end of a capacitor C25, a first end of a capacitor C26 and a VM pin of the driving chip are interconnected, an OUTA pin of the driving chip is connected with a first end of the resistor R22, and a connection node thereof is a first sub-driving output end of the driving module; an OUTB pin of the driving chip is connected with a second end of the resistor R22, and a connection node thereof is a second sub-driving output end of the driving module; and a second end of the resistor R25, an emitter of the transistor Q4, a second end of the capacitor C25 and a second end of the capacitor C26 are all grounded.

[0012] Preferably, the interface module comprises a Wifi, a Bluetooth Internet of Things communication module and a wireless remote control module, and the Wifi, the Bluetooth Internet of Things communication module and the wireless remote control module are connected with the control module respectively.

[0013] Preferably, the driving circuit further comprises a VDC power supply circuit, an output end of the VDC power supply circuit is connected with an input end of the voltage conversion module, and the VDC power supply circuit is used for inputting a commercial power supply.

[0014] On one hand, the driving circuit converts solar energy into electric energy through the solar power supply module, and converts the electric energy into voltages respectively matched with the driving circuit and the control circuit through the voltage conversion circuit, so that the driving module drives the dimming glass to work, and solar power supply of the dimming glass is realized. On the other hand, the driving circuit receives a dimming control signal sent by a remote control device through the interface module, and controls the driving output of the driving module according to the dimming control signal, so as to adjust the brightness of the dimming glass. In this way, the user can remotely control the brightness of the dimming glass, which is very convenient. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a structural schematic view of an embodiment of the driving circuit of the dimming glass according to the present application;

[0016] Figure 2 FIG. 2 is a structural schematic view of another embodiment of the driving circuit of the dimming glass according to the present application;

[0017] Figure 3 For Figure 2 Circuit structure schematic diagram of one embodiment of the battery charging circuit;

[0018] Figure 4 For Figure 2 Circuit structure schematic diagram of one embodiment of the battery charging circuit;

[0019] Figure 5 For Figure 2 Circuit structure schematic diagram of one embodiment of the boost circuit;

[0020] Figure 6 For Figure 2 Circuit structure schematic diagram of one embodiment of the voltage stabilizing circuit;

[0021] Figure 7 For Figure 1 Or Figure 2 Circuit structure schematic diagram of one embodiment of the control module;

[0022] Figure 8 For Figure 1 Or Figure 2 Circuit structure schematic diagram of one embodiment of the drive module;

[0023] Figure 9 For Figure 2 Structure schematic diagram of one embodiment of the Wifi, Bluetooth and Internet of Things communication module;

[0024] Figure 10 For Figure 2 Structure schematic diagram of one embodiment of the wireless remote control module;

[0025] Figure 11 For Figure 2 Structure schematic diagram of one embodiment of the VDC power supply circuit. DETAILED DESCRIPTION

[0026] The scheme in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0027] Please refer to Figures 1 to 11The utility model provides a kind of light control glass drive circuit, including solar power supply module 100, voltage conversion module 200, drive module 300, control module 500 and interface module 600;The output of solar power supply module 100 is connected with the input of voltage conversion module 200, the first output of voltage conversion module 200 is connected with the power end of drive module 300, the second output of voltage conversion module 200 is connected with the power end of control module 500;The drive output end of drive module 300 is used to provide drive voltage for light control glass 400, the controlled end of drive module 300 is connected with the control end of control module 500, and the signal transmission end of control module 500 is connected with interface module 600.

[0028] When the present light control glass drive circuit is in working condition, solar power supply module 100 converts solar energy into electric energy and outputs to voltage conversion module 200. Voltage conversion module 200 converts the input electric energy and outputs drive module power supply matched with drive module 300 and control module power supply matched with control module 500 respectively.

[0029] In the present scheme, on the one hand, drive module 300 can drive light control glass 400 to work after obtaining power supply, realizing solar power supply of light control glass. On the other hand, control module 500 can start to work after obtaining power supply, receives light control signal through interface module 600 and controls the output of drive module 300 according to the light control signal, so as to adjust the brightness of light control glass 400. In this way, users can remotely control the brightness of light control glass 400, which is very convenient.

[0030] In an optional embodiment, in order to facilitate the change of light and shade of light control glass 400 controlled by mobile phone APP, tablet or computer, realize remote operation and control, and more conveniently access intelligent object system and intelligent furniture system for control, the above-mentioned interface module 600 includes Wifi, Bluetooth Internet of Things communication module 610 and wireless remote control module 620, and Wifi, Bluetooth Internet of Things communication module 610 and wireless remote control module 620 are connected with control module 500 respectively.

[0031] In a preferred embodiment, the structure of Wifi, Bluetooth Internet of Things communication module 610 can be referred to Figure 10 , which includes resistance R6, capacitor C3 and signal transmission terminal RF. When Wifi, Bluetooth Internet of Things communication module 610 receives light control signal, it sends data (such as DATA shown in Figure 10 ) corresponding to light control signal to control module 500, so that control module 500 controls drive module 300 according to light control signal.

[0032] In a preferred embodiment, the structure of wireless remote control module 620 can be referred toFigure 11 The wireless remote control module 620 is preferably a 433MHz frequency receiving module. When the transmitter (not shown) on the other end sends an "on" signal, the wireless remote control module 620 receives the instruction and sends it to the control module 500 for processing. The control module 500 then sends an instruction to drive the dimming glass to the bright state. When the transmitter sends an "off" signal, the control module 500 sends an instruction to drive the dimming glass to the black state.

[0033] It can be understood that the power output by the solar power module 100 is easily affected by the intensity of sunlight. Thus, when it is continuously rainy, the power output by the solar power module 100 can not be enough for use. In order to increase the reliability of the dimming glass driving circuit, a VDC power supply circuit 700 is additionally provided. The VDC power supply circuit 700 inputs power from the mains and outputs it to the voltage conversion module 200, thereby realizing multi-source power supply for the dimming glass 400.

[0034] Referring to Figure 2 and Figure 11 In a preferred embodiment, the VDC power supply circuit 700 includes a power supply socket DC1, a voltage stabilizing diode D1, and a capacitor C14. A 12V positive and 6V negative wide voltage power supply can be externally connected. The voltage stabilizing diode D1 is a foolproof device to prevent the positive and negative terminals of the circuit from being reversely connected and burning the rear-end components of the PCB. The capacitor C14 is used for filtering.

[0035] Referring to Figure 2 In an optional embodiment, the solar power module 100 includes a solar power supply circuit 110, a battery charging circuit 120, an energy storage battery 130, and a voltage stabilizing diode D2. The output end of the solar power supply circuit 110 is connected to the input end of the battery charging circuit 120. The output end of the battery charging circuit 120 is connected to the input end of the energy storage battery 130. The output end of the energy storage battery 130 is connected to the anode of the voltage stabilizing diode D2. The cathode of the voltage stabilizing diode D2 is the output end of the solar power module 100. The solar power supply circuit 110 is used to convert solar energy into electrical energy and charge the energy storage battery 130 through the battery charging circuit 120.

[0036] Here, the energy storage battery 130 is preferably a lithium battery, and the battery charging circuit 120 is preferably a lithium battery charging circuit suitable for lithium batteries.

[0037] In addition, referring to Figure 3 The solar power supply circuit 110 includes a female socket P1, a voltage stabilizing diode D3, and a capacitor C6. The first end of the female socket P1 is connected to the anode of the voltage stabilizing diode D3. The cathode of the voltage stabilizing diode D3 is connected to the first end of the capacitor C6. The connection node is the output end of the solar power supply circuit 110. The second end of the female socket P1 and the second end of the capacitor C6 are grounded.

[0038] In the circuit structure, the female seat P1 is used for connecting the voltage input of the external photovoltaic solar panel. When the solar panel is illuminated by sunlight, a voltage of 15V to 20V is generated. The voltage stabilizing diode D3 can prevent the solar panel from being connected reversely and burning the rear-end components. The capacitor C6 is used for filtering.

[0039] Referring to Figure 4 The battery charging circuit 120 includes the charging management chip U1, the resistor R1, the resistor R2, the resistor R3, the resistor R5, the resistor RS1, the capacitor C1, the capacitor C2, the capacitor C4, the capacitor C7, the capacitor C8, the inductor L1, and the first indicator lamp LED1. The first end of the resistor R3, the IN pin of the charging management chip U1, the positive electrode of the capacitor C4, and the positive electrode of the first indicator lamp LED1 are interconnected, and the connection node is the input end of the battery charging circuit 120. The second end of the resistor R3 is connected with the EN pin of the charging management chip U1. The TEMP pin of the charging management chip U1 is connected with the first end of the resistor R1. The CHRG pin of the charging management chip U1 is connected with the first end of the resistor R2. The second end of the resistor R2 is connected with the negative electrode of the first indicator lamp LED1. The SW pin of the charging management chip U1, the first end of the inductor L1, the second end of the capacitor C7, and the first end of the resistor R5 are interconnected. The first end of the capacitor C7 is connected with the BS pin of the charging management chip U1. The second end of the resistor R5 is connected with the first end of the capacitor C8. The second end of the inductor L2 is connected with the first end of the resistor RS1. The second end of the resistor RS1, the positive electrode of the capacitor C1, and the first end of the capacitor C2 are interconnected, and the connection node is the output end of the battery charging circuit 120. The negative electrode of the capacitor C4, the EP pin of the charging management chip U1, the second end of the capacitor C8, the second end of the resistor R1, the second end of the capacitor C1, and the second end of the capacitor C2 are grounded.

[0040] In the circuit structure, the charging management chip U1 is a constant current and constant voltage charging mode lithium battery charging management chip, which can quickly and efficiently charge the lithium battery. In the constant current charging mode, the charging current is set by an external detection resistor and an internal 100mV reference voltage, which adopts a current mode PWM step-down switching control structure, providing a simple and efficient solution for fast charging of lithium batteries. Capacitor C4 is the filter capacitor for the input end of the battery charging circuit 120, resistor R3 is the control switch of the charging management chip U1, and the high potential processing working state. The charging management chip U1 displays different charging processes through the output state of the CHRG pin. After connecting the first indicator lamp LED1 and the resistor R2, the first charging indicator lamp LED1 lights up during charging, and becomes high resistance and unlit after full charging. Resistors R5 and R6 are used to improve the EMI characteristics of the system. Capacitor C1 is a filter capacitor, and capacitors C1 and C2 are filter circuits at the output end of the charging management chip U1. VBAT1 is a lithium battery socket interface. The voltage stabilizing diode D2 is a one-way output voltage circuit for the lithium battery supply output end. Prevents voltage from directly entering the lithium battery and the charging management chip U1 when selecting an external DC power supply, causing malfunctions.

[0041] In a preferred embodiment, the voltage conversion module 200 includes a boost circuit 210 and a voltage stabilizing circuit 220. The input end of the boost circuit 210 is connected to the input end of the voltage stabilizing circuit 220, and the connection node is the input end of the voltage conversion module 200. The output end of the boost circuit 210 is the first output end of the voltage conversion module 200, and the output end of the voltage stabilizing circuit 220 is the second output end of the voltage conversion module 200.

[0042] Figure 5is a schematic diagram of a preferred embodiment of the voltage boosting circuit 210, including a voltage boosting chip U4, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R18, a capacitor C16, a capacitor C17, a capacitor C18, a capacitor C19, an inductor L2, a voltage stabilizing diode D4, a transistor Q1, and a transistor Q2. A first end of the resistor R9 is connected to an emitter of the transistor Q1, and a connection node thereof is an input end of the voltage boosting circuit 210. A second end of the resistor R9, a base of the transistor Q1, and a first end of the resistor R11 are interconnected. A second end of the resistor R11 is connected to a collector of the transistor Q2. A base of the transistor Q2, a first end of the resistor R18, and a second end of the resistor R13 are interconnected. A first end of the resistor R13 is configured to receive a power saving control signal. A second end of the inductor L2, an anode of the voltage stabilizing diode D4, and a SW pin of the voltage boosting chip U4 are interconnected. A FB pin of the voltage boosting chip U4, a second end of the resistor R15, and a first end of the resistor R16 are interconnected. A VIN pin of the voltage boosting chip U4 and a second end of the resistor R14 are connected to a VCC power supply. An EN pin of the voltage boosting chip U4 is connected to a first end of the resistor R14. A cathode of the voltage stabilizing diode D4, a first end of the capacitor C16, a first end of the capacitor C17, and a first end of the resistor R10 are interconnected, and a connection node thereof is an output end of the voltage boosting circuit 210. A second end of the resistor R10 is connected to a first end of the resistor R12, and a connection node thereof is an output voltage detection point. A second end of the resistor R18, an emitter of the transistor Q2, a second end of the capacitor C18, a second end of the capacitor C19, a first end of the resistor R15, a GND pin of the voltage boosting chip U4, a second end of the capacitor C16, a second end of the capacitor C17, and a second end of the resistor R12 are all grounded.

[0043] In the circuit structure, the VIN pin of the voltage boosting chip U4 is configured to input the VCC power supply. The EN pin is an EN switch enable end, which is effective at a high level. The resistor R14 is pulled up to the VCC power supply. The voltage boosting is mainly achieved by external resistance division of the resistor R15 and the resistor R16, and output of a 20V stable voltage value. The inductor L2 is a power inductor. The voltage stabilizing diode D4, the capacitor C16, and the capacitor C17 are a half-wave rectifier circuit, which is further fed back by the FB to achieve a stable boosted voltage value. The resistor R10 and the resistor R12 are output voltage detections. After 10:1 voltage division, whether the output voltage value is 20V is identified by the control module 500. If the output voltage value is too low or too high, the control module 500 controls the switch of the VCC power supply by outputting a high potential. This part of the circuit is controlled by the transistor Q1, the transistor Q2, the resistor R9, the resistor R11, the resistor R13, the resistor R18, and the control module 500 (in an optional embodiment, the control module 500 can be referred to as a control module 500 in the voltage boosting circuit 210). Figure 7The EN0 pin of the control chip controls the cutting of the front power supply and protects the rear circuit. When the EN0 pin of the control chip U3 outputs a high level to close the VCC power supply, the power saving mode can also be realized. Capacitors C18 and C19 are filter circuits for the VCC voltage input terminal.

[0044] Figure 6 is a schematic diagram of the circuit structure of a preferred embodiment of the voltage stabilizing circuit 220, which includes capacitors C10, C11, C12 and a voltage stabilizing chip U2. The first end of the capacitor C10 is connected to the IN pin of the voltage stabilizing chip U2, and the connection node is the input terminal of the voltage stabilizing circuit 220. The OUT pin of the voltage stabilizing chip U2, the first end of the capacitor C11 and the first end of the capacitor C12 are interconnected, and the connection node is the output terminal of the voltage stabilizing circuit 220. The second end of the capacitor C10, the GND pin of the voltage stabilizing chip U2, the second end of the capacitor C11 and the second end of the capacitor C12 are all grounded.

[0045] Here, the IN pin of the voltage stabilizing chip U2 is connected to the power supply output (the output voltage is preferably 12V) of the solar power supply module 100 or the VDC power supply circuit 700, the OUT pin outputs 3.3V for the control module 500 to work, the capacitor C10 is an input terminal filter circuit, and the capacitors C11 and C12 are output terminal filter circuits. The switch SW1 is the main power supply switch.

[0046] Figure 7 is a schematic diagram of the circuit structure of a preferred embodiment of the control module 500. Specifically, the control module 500 realizes the main core control system by the control chip U3, and the functions include providing the PWM signal required by the drive control dimming glass 400, realizing the bright and dark control of the dimming glass 400 by the signal processing of the wireless remote control module 620, and data processing of the Wifi, Bluetooth and Internet of Things communication module 610. The 3.3V power supply is filtered by capacitors C20, C21, C22, C23 and C24, and then input to the VDDA pin and two VDD pins of the control chip U3. The crystal oscillator X1, the capacitor C9 and the capacitor C13 are external crystal oscillator circuits. The capacitor C15, the resistor R8 and the switch SW2 are manual reset reserved buttons. The resistors R4 and R7 are high and low voltage resistors selected for the BOOT0 pin of the control chip U3. The resistor R17 and the second indicator LED2 are used as the display light of the wireless remote control code matching success, which flashes and becomes constant. The resistors R20 and R21, the third indicator LED3 and the fourth indicator LED4 are used as the data transmission light state of the Wifi, Bluetooth and Internet of Things communication module 610.

[0047] Figure 8is a preferred embodiment circuit structure schematic diagram of the above-mentioned driving module 300. Specifically, it comprises a driving chip U5, resistors R19, R22, R23, R24, R25, transistors Q3 and Q4; the first end of the resistor R19 is connected with the emitter of the transistor Q3, and the connection node thereof is the power supply end of the driving module 300; the second end of the resistor R19, the first end of the resistor R23 and the base of the transistor Q3 are interconnected, the second end of the resistor R23 is connected with the collector of the transistor Q4, the base of the transistor Q4, the first end of the resistor R25 and the second end of the resistor R24 are interconnected, and the first end of the resistor R24 is the controlled end of the driving module 300; the collector of the transistor Q3, the first end of the capacitor C25, the first end of the capacitor C26 and the VM pin of the driving chip U5 are interconnected, the OUTA pin of the driving chip U5 is connected with the first end of the resistor R22, and the connection node thereof is the first sub-driving output end of the driving module 300; the second end of the resistor R25, the emitter of the transistor Q4, the second end of the capacitor C25 and the second end of the capacitor C26 are all grounded.

[0048] Here, the driving chip U5 is used to complete the output of the alternating square wave signal to the dimming glass drive, and the INA pin and the INB pin of the driving chip U5 are controlled to work by the PWM signal output by the control module 500. The resistor R22 is a discharge resistor connected in parallel across the dimming glass 400, and when the driving chip U5 does not work, the resistor R22 will quickly discharge the potential difference across the dimming glass 400. The capacitors C25 and C26 are filter circuits for the input voltage of the VM pin of the driving chip U5. The on and off of the dimming glass 400 is controlled by the transistor Q3, the transistor Q4, the resistor R19, the resistor R23, the resistor R24 and the resistor R25, and the power supply of the driving chip U5 is controlled by the EN1 pin of the control chip U3 in the control module 500. Thus, the fast switching of the dimming glass 400 is realized.

[0049] The technical scheme of the utility model discloses a dimming glass is powered by solar panels, compared with the scheme of using commercial power as the power supply, the installation wiring of the dimming glass can be effectively simplified, and it is especially suitable for scenes such as automobiles and building curtain walls.

[0050] It should be noted that the technical solutions of various embodiments of the utility model can be combined with each other, but must be based on the realization of ordinary skilled persons in the art, and when the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the scope of the utility model claimed.

[0051] The above only describes some or preferred embodiments of the present application, neither the text nor the drawings can limit the scope of protection of the present application, any equivalent structural transformation or direct / indirect application in other related technical fields under the concept of the whole present application and the contents of the present application and the drawings are included in the scope of protection of the present application.

Claims

1. A dimming glass driving circuit, characterized by comprising: The solar power supply module, the voltage conversion module, the driving module, the control module and the interface module are connected; the output end of the solar power supply module is connected with the input end of the voltage conversion module; the first output end of the voltage conversion module is connected with the power supply end of the driving module; the second output end of the voltage conversion module is connected with the power supply end of the control module; The driving output end of the driving module is used for providing driving voltage for the dimming glass; the controlled end of the driving module is connected with the control end of the control module; the signal transmission end of the control module is connected with the interface module.

2. The dimming glass driving circuit according to claim 1, wherein The solar power supply module comprises a solar power supply circuit, a battery charging circuit, an energy storage battery and a voltage stabilizing diode D2; the output end of the solar power supply circuit is connected with the input end of the battery charging circuit; the output end of the battery charging circuit is connected with the input end of the energy storage battery; the output end of the energy storage battery is connected with the anode of the voltage stabilizing diode D2; the cathode of the voltage stabilizing diode D2 is the output end of the solar power supply module. The solar power supply circuit is used for converting solar energy into electric energy and charging the energy storage battery through the battery charging circuit.

3. The dimming glass driving circuit according to claim 2, wherein The solar power supply circuit comprises a female seat, a voltage stabilizing diode D3 and a capacitor C6; the first end of the female seat is connected with the anode of the voltage stabilizing diode D3; the cathode of the voltage stabilizing diode D3 is connected with the first end of the capacitor C6; the connection node is the output end of the solar power supply circuit; the second end of the female seat and the second end of the capacitor C6 are grounded.

4. The dimming glass driving circuit according to claim 2, wherein The battery charging circuit comprises a charging management chip, resistors R1, R2, R3, R5, RS1, capacitors C1, C2, C4, C7, C8, an inductor L1 and a first indicator lamp; The first end of the resistor R3, the IN pin of the charging management chip, the positive electrode of the capacitor C4 and the positive electrode of the first indicator lamp are interconnected; the connection node is the input end of the battery charging circuit; the second end of the resistor R3 is connected with the EN pin of the charging management chip; the TEMP pin of the charging management chip is connected with the first end of the resistor R1; the CHRG pin of the charging management chip is connected with the first end of the resistor R2; the second end of the resistor R2 is connected with the negative electrode of the first indicator lamp; The SW pin of the charging management chip, the first end of the inductor L1, the second end of the capacitor C7 and the first end of the resistor R5 are interconnected; the first end of the capacitor C7 is connected with the BS pin of the charging management chip; the second end of the resistor R5 is connected with the first end of the capacitor C8; the second end of the inductor L2 is connected with the first end of the resistor RS1; the second end of the resistor RS1, the positive electrode of the capacitor C1 and the first end of the capacitor C2 are interconnected; the connection node is the output end of the battery charging circuit. The negative electrode of the capacitor C4, the EP pin of the charge management chip, the second end of the capacitor C8, the second end of the resistor R1, the second end of the capacitor C1 and the second end of the capacitor C2 are grounded.

5. The dimming glass driving circuit according to claim 1, wherein The voltage conversion module comprises a boost circuit and a voltage stabilizing circuit, the input end of the boost circuit is connected with the input end of the voltage stabilizing circuit, the connection node is the input end of the voltage conversion module, the output end of the boost circuit is the first output end of the voltage conversion module, and the output end of the voltage stabilizing circuit is the second output end of the voltage conversion module.

6. The dimming glass driving circuit according to claim 5, wherein The boost circuit comprises a boost chip, resistors R9, R10, R11, R12, R13, R14, R15, R16, R18, capacitors C16, C17, C18, C19, an inductor L2, a voltage stabilizing diode D4, transistors Q1 and Q2. The first end of the resistor R9 is connected with the emitter of the transistor Q1, the connection node is the input end of the boost circuit, the second end of the resistor R9, the base of the transistor Q1 and the first end of the resistor R11 are interconnected, the second end of the resistor R11 is connected with the collector of the transistor Q2, the base of the transistor Q2, the first end of the resistor R18 and the second end of the resistor R13 are interconnected, and the first end of the resistor R13 is used for receiving a power saving control signal. The second end of the inductor L2, the anode of the voltage stabilizing diode D4 and the SW pin of the boost chip are interconnected, the FB pin of the boost chip, the second end of the resistor R15 and the first end of the resistor R16 are interconnected, the VIN pin of the boost chip and the second end of the resistor R14 are connected with a VCC power supply, the EN pin of the boost chip is connected with the first end of the resistor R14, the cathode of the voltage stabilizing diode D4, the first end of the capacitor C16, the first end of the capacitor C17 and the first end of the resistor R10 are interconnected, and the connection node is the output end of the boost circuit. The second end of the resistor R10 is connected with the first end of the resistor R12, the connection node is an output voltage detection point, and the second end of the resistor R18, the emitter of the transistor Q2, the second end of the capacitor C18, the second end of the capacitor C19, the first end of the resistor R15, the GND pin of the boost chip, the second end of the capacitor C16, the second end of the capacitor C17 and the second end of the resistor R12 are grounded.

7. The dimming glass driving circuit according to claim 5, wherein The voltage stabilizing circuit comprises capacitors C10, C11, C12 and a voltage stabilizing chip, the first end of the capacitor C10 is connected with the IN pin of the voltage stabilizing chip, the connection node is the input end of the voltage stabilizing circuit, the OUT pin of the voltage stabilizing chip, the first end of the capacitor C11 and the first end of the capacitor C12 are interconnected, the connection node is the output end of the voltage stabilizing circuit, and the second end of the capacitor C10, the GND pin of the voltage stabilizing chip, the second end of the capacitor C11 and the second end of the capacitor C12 are grounded.

8. The dimming glass driving circuit according to claim 1, wherein, The driving module comprises a driving chip, resistors R19, R22, R23, R24, R25, capacitors C25, C26, a transistor Q3 and a transistor Q4; A first end of the resistor R19 is connected with an emitter of the transistor Q3, a connection node thereof being a power supply end of the driving module, a second end of the resistor R19, a first end of the resistor R23 and a base of the transistor Q3 being interconnected, a second end of the resistor R23 being connected with a collector of the transistor Q4, a base of the transistor Q4, a first end of the resistor R25 and a second end of the resistor R24 being interconnected, and a first end of the resistor R24 being a controlled end of the driving module; A collector of the transistor Q3, a first end of the capacitor C25, a first end of the capacitor C26 and a VM pin of the driving chip are interconnected, an OUTA pin of the driving chip being connected with a first end of the resistor R22, a connection node thereof being a first sub-driving output end of the driving module, and an OUTB pin of the driving chip being connected with a second end of the resistor R22, a connection node thereof being a second sub-driving output end of the driving module; A second end of the resistor R25, an emitter of the transistor Q4, a second end of the capacitor C25 and a second end of the capacitor C26 are all grounded.

9. The dimming glass driving circuit according to claim 1, wherein, The interface module comprises a Wifi, a Bluetooth, an Internet of Things communication module and a wireless remote control module, and the Wifi, the Bluetooth, the Internet of Things communication module and the wireless remote control module are connected with the control module respectively.

10. The dimming glass driving circuit according to claim 1, wherein, The dimming glass driving circuit further comprises a VDC power supply circuit, an output end of the VDC power supply circuit being connected with an input end of the voltage conversion module, and the VDC power supply circuit being used for inputting a commercial power supply.

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