A variable tint control circuit for eyewear and wearable variable tint eyewear

Abstract

The application discloses a glasses discoloration control circuit and wearable discoloration glasses, and relates to the technical field of circuit control. In the circuit, the signal input end of a voltage control circuit is connected with a micro control unit, the output end of the voltage control circuit is connected with the voltage input end of an H-bridge driving circuit and the feedback input end of a voltage feedback circuit, the feedback output end of the voltage feedback circuit is connected with the micro control unit, and the load interface of the H-bridge driving circuit is connected with lenses; the micro control unit generates a control signal corresponding to a duty ratio based on a set voltage and outputs the control signal; the voltage control circuit controls the turn-on and turn-off of a power supply voltage based on the control signal, and outputs a voltage signal based on the power supply voltage when the power supply voltage is turned on; the voltage feedback circuit adjusts the duty ratio of the control signal through a PID controller based on the voltage signal; and the H-bridge driving circuit controls the discoloration of the lenses based on the voltage signal and an H-bridge control signal. The application can realize lens discoloration control through voltage closed-loop control, and the circuit is simple and easy to realize, and is convenient for batch production and application.

Description

Technical Field

[0001] This application relates to the field of circuit control technology, and in particular to a photochromic control circuit for eyeglasses and wearable photochromic eyeglasses. Background Technology

[0002] In modern society, as people pay increasing attention to vision protection, photochromic glasses, as a vision protection device that can dynamically adjust the light transmittance of the lens to adapt to changes in ambient light, are becoming increasingly important.

[0003] In the field of photochromic lens technology, photosensitive materials or liquid crystal display technology are currently the main approaches. Photosensitive material-based lens color-changing control technology, based on the principle of photochromism, relies on ultraviolet light to trigger the adjustment of the lens's transmittance. However, this technology has a significant drawback: slow color-changing response. In scenes with sudden changes in brightness, the lens cannot adjust its transmittance in time, causing temporary blurred vision. Another technology, based on liquid crystal display technology, can adjust transmittance electronically, but it is limited by the characteristics of polarizers, leading to blurring at different viewing angles. Furthermore, its theoretical limit for bright-state transmittance is relatively low, limiting its practical applications. Summary of the Invention

[0004] This application provides a photochromic control circuit for eyeglasses and wearable photochromic eyeglasses to solve or at least partially solve the defects or deficiencies in related technologies.

[0005] In a first aspect, this application provides a photochromic control circuit for eyeglasses, the photochromic control circuit comprising a microcontroller unit, a voltage control circuit, an H-bridge drive circuit, and a voltage feedback circuit, wherein: The signal input terminal of the voltage control circuit is connected to the microcontroller unit. The power input terminal of the voltage control circuit is used to receive the power supply voltage. The output terminal of the voltage control circuit is connected to the voltage input terminal of the H-bridge drive circuit and the feedback input terminal of the voltage feedback circuit. The feedback output terminal of the voltage feedback circuit is connected to the microcontroller unit. The signal receiving terminal of the H-bridge drive circuit is used to receive the H-bridge control signal. The load interface of the H-bridge drive circuit is connected to the lens. The microcontroller unit is used to receive a set voltage, generate a control signal with a corresponding duty cycle based on the set voltage, and output the control signal to the voltage control circuit. The voltage control circuit is used to receive the power supply voltage and the control signal, and control the power supply voltage to be turned on and off based on the control signal. When the control signal is a preset turn-on signal, it outputs voltage signals to the H-bridge drive circuit and the voltage feedback circuit respectively based on the power supply voltage. The voltage feedback circuit is used to receive the voltage signal and adjust the duty cycle of the control signal through a proportional-integral-derivative controller based on the voltage signal so that the control signal is output stably. The H-bridge drive circuit is used to receive the voltage signal and the H-bridge control signal, and control the lens to change color based on the voltage signal and the H-bridge control signal.

[0006] Secondly, this application provides wearable photochromic glasses, including lenses and the aforementioned photochromic control circuit.

[0007] Based on the exemplary embodiments provided in this application, the following technical effects are disclosed: In the photochromic control circuit and wearable photochromic glasses provided in this application, a microcontroller unit, a voltage control circuit, and an H-bridge drive circuit are connected sequentially. A voltage feedback circuit is connected to the output of the voltage control circuit and the microcontroller unit to feed back the acquired voltage control circuit output to the microcontroller unit. First, the microcontroller unit generates a control signal with a corresponding duty cycle based on a set voltage. Then, the voltage control circuit controls the on and off of the power supply voltage based on this control signal. When the power supply voltage is on, it outputs a voltage signal to the H-bridge drive circuit based on the power supply voltage. The H-bridge drive circuit can control the lens to change color based on this voltage signal and the H-bridge control signal. This application can achieve lens coloring / fading control through voltage closed-loop control, and the photochromic control circuit is simple to implement, facilitating mass production and application. Attached Figure Description

[0008] Figure 1 A schematic diagram of a photochromic control circuit for eyeglasses provided in an embodiment of this application; Figure 2 A schematic diagram of a voltage control circuit provided in an embodiment of this application; Figure 3 A schematic diagram of a voltage feedback circuit provided in an embodiment of this application; Figure 4 A schematic diagram of an H-bridge driving circuit provided in an embodiment of this application; Figure 5 A schematic diagram of signals and currents for a lens coloring process provided in an embodiment of this application; Figure 6 This is a schematic diagram of signals and currents during a lens fading process, provided as an embodiment of this application. Detailed Implementation

[0009] This application provides a photochromic control circuit for eyeglasses, such as... Figure 1As shown, the photochromic control circuit for the glasses includes a microcontroller unit (MCU) 10, a voltage control circuit 20, an H-bridge drive circuit 30, and a voltage feedback circuit 40, wherein: like Figure 1 As shown, the signal input terminal of the voltage control circuit 20 is connected to the microcontroller unit 10, the power input terminal of the voltage control circuit 20 is used to receive the power supply voltage, the output terminal of the voltage control circuit 20 is connected to the voltage input terminal of the H-bridge drive circuit 30 and the feedback input terminal of the voltage feedback circuit 40 respectively, the feedback output terminal of the voltage feedback circuit 40 is connected to the microcontroller unit 10, the signal receiving terminal of the H-bridge drive circuit 30 is used to receive the H-bridge control signal, and the load interface of the H-bridge drive circuit 30 is connected to the lens.

[0010] The microcontroller unit 10 is used to receive a set voltage, generate a control signal VCC_PWM with a corresponding duty cycle based on the set voltage, and output the control signal VCC_PWM to the voltage control circuit 20.

[0011] The voltage control circuit 20 is used to receive the power supply voltage V_BAT+ and the control signal VCC_PWM, and controls the power supply voltage to turn on and off based on the control signal VCC_PWM. When the control signal VCC_PWM is a preset turn-on signal (i.e. the power supply voltage is on), it outputs the voltage signal VCC_L to the H-bridge drive circuit 30 and the voltage feedback circuit 40 based on the power supply voltage.

[0012] The voltage feedback circuit 40 is used to receive the voltage signal VCC_L and adjust the duty cycle of the control signal through the proportional-integral-derivative controller based on the voltage signal VCC_L so that the control signal is output stably.

[0013] The H-bridge drive circuit 30 receives the voltage signal VCC_L and the H-bridge control signal PWM, and controls the lens to change color based on the voltage signal VCC_L and the H-bridge control signal. Specifically, changing the H-bridge control signal can achieve both coloring and fading of the lens.

[0014] In one alternative embodiment, such as Figure 2 As shown, the voltage control circuit 20 includes a switch control circuit 21 and a filter and voltage regulator circuit 22. The output terminal of the switch control circuit 21 is connected to the input terminal of the filter and voltage regulator circuit 22. The output terminal of the filter and voltage regulator circuit 22 is connected to the voltage input terminal of the H-bridge drive circuit 30 and the feedback input terminal of the voltage feedback circuit 40, respectively.

[0015] The switch control circuit 21 is used to receive the power supply voltage and control signal, and control the power supply voltage to be turned on and off based on the control signal.

[0016] The filter and voltage regulator circuit 22 is used to filter and regulate the power supply voltage to obtain a voltage signal when the control signal is a preset conduction signal, and output the voltage signal to the H-bridge drive circuit 30 and the voltage feedback circuit 40 respectively.

[0017] In one alternative embodiment, such as Figure 2 As shown, the switch control circuit 21 includes a first resistor (R13), a second resistor (R20), and a PMOS transistor (Q5), wherein: One end of the first resistor (R13) is connected to the power input terminal of the voltage control circuit 20, and the other end of the first resistor (R13) is connected to the gate (pin 1) of the PMOS transistor (Q5). One end of the second resistor (R20) is connected to the signal input terminal of the voltage control circuit 20, and the other end of the second resistor (R20) is connected to the gate (pin 1) of the PMOS transistor (Q5). The source (pin 2) of the PMOS transistor (Q5) is connected to the power input terminal of the voltage control circuit 20, and the drain (pin 3) of the PMOS transistor (Q5) is connected to the filter and voltage regulator circuit 22.

[0018] In one optional embodiment, the filter and voltage regulator circuit 22 includes an RC filter circuit 221, an integrator circuit 222, and an anti-floating circuit 223 connected in sequence.

[0019] For example, such as Figure 2 As shown, the RC filter circuit 221 includes a third resistor (R21) and a first capacitor (C5), the integrator circuit 222 includes a fourth resistor (R14) and a second capacitor (C6), and the anti-floating circuit 223 includes a fifth resistor (R15), wherein: One end of the third resistor (R21) is connected to the switch control circuit 21, and the other end of the third resistor (R21) is connected to one end of the first capacitor (C5) and one end of the fourth resistor (R14). The other end of the first capacitor (C5) is grounded. The other end of the fourth resistor (R14) is connected to one end of the second capacitor (C6) and one end of the fifth resistor (R15), and the other end of the second capacitor (C6) is grounded. One end of the fifth resistor (R15) is also connected to the output of the filter and voltage regulator circuit 22, and the other end of the fifth resistor (R15) is grounded.

[0020] like Figure 2As shown, BAT+ is the voltage input terminal for receiving the power supply voltage, Q5 is a PMOS transistor, R13 is a pull-up resistor, VCC_PWM is the control signal input from the microcontroller unit 10 to the voltage control circuit 20, and VCC_PWM is received through the signal input terminal of the voltage control circuit 20. R21 and C5 form an RC filter circuit 221, R14 and C6 form an integrator circuit 222, VCC_L is the voltage signal output from the output terminal of the filter and voltage regulator circuit 22, that is, the voltage signal output from the output terminal of the entire voltage control circuit 20, and R15 is a dummy load to prevent the output terminal of the entire voltage control circuit 20 from being floating.

[0021] In one alternative embodiment, such as Figure 3 As shown, the voltage feedback circuit 40 includes a sixth resistor (R16) and a third capacitor (C7), wherein: One end of the sixth resistor (R16) is connected to the feedback output terminal of the voltage feedback circuit 40, and the other end of the sixth resistor (R16) is connected to one end of the third capacitor (C7) and the feedback input terminal of the voltage feedback circuit 40 respectively. The other end of the third capacitor (C7) is grounded.

[0022] like Figure 3 As shown, VCC_L is the voltage signal output by the voltage control circuit 20. This voltage signal is input to the voltage feedback circuit 40 from the feedback input terminal of the voltage feedback circuit 40. R16 is a current limiting resistor, C7 is a filter capacitor, and VCC_L_AD is the feedback signal output by the voltage feedback circuit 40. VCC_L_AD is output from the voltage feedback circuit 40 to the microcontroller unit 10 to adjust the control signal VCC_PWM output by the microcontroller unit 10.

[0023] In one alternative embodiment, such as Figure 4 As shown, the signal receiving end of the H-bridge drive circuit 30 includes a first signal receiving end (M1), a second signal receiving end (M2), a third signal receiving end (M3), and a fourth signal receiving end (M4); the load interface of the H-bridge drive circuit 30 includes a first load interface (LOAD+) and a second load interface (LOAD-). The H-bridge driver circuit 30 includes a seventh resistor (R1), a first PNP transistor (Q1), an eighth resistor (R2), a first NPN transistor (Q3), a ninth resistor (R3), a second PNP transistor (Q2), a tenth resistor (R4), and a second NPN transistor (Q4), wherein: One end of the seventh resistor (R1) is connected to the first signal receiver (M1), and the other end of the seventh resistor (R1) is connected to the base of the first PNP transistor (Q1); one end of the eighth resistor (R2) is connected to the second signal receiver (M2), and the other end of the eighth resistor (R2) is connected to the base of the first NPN transistor (Q3); one end of the ninth resistor (R3) is connected to the third signal receiver (M3), and the other end of the ninth resistor (R3) is connected to the base of the second PNP transistor (Q2); one end of the tenth resistor (R4) is connected to the fourth signal receiver (M4), and the other end of the tenth resistor (R4) is connected to the base of the second NPN transistor (Q4); The emitter of the first PNP transistor (Q1) is connected to the voltage input terminal of the H-bridge driver circuit 30, and the collector of the first PNP transistor (Q1) is connected to the first load interface (LOAD+); the collector of the first NPN transistor (Q3) is connected to the first load interface (LOAD+), and the emitter of the first NPN transistor (Q3) is grounded; the emitter of the second PNP transistor (Q2) is connected to the voltage input terminal of the H-bridge driver circuit 30, and the collector of the second PNP transistor (Q2) is connected to the second load interface (LOAD-); the collector of the second NPN transistor (Q4) is connected to the second load interface (LOAD-), and the emitter of the second NPN transistor (Q4) is grounded.

[0024] The H-bridge control signals include the first H-bridge control signal (PWM1), the second H-bridge control signal (PWM2), the third H-bridge control signal (PWM3), and the fourth H-bridge control signal (PWM4).

[0025] The H-bridge drive circuit 30 is specifically used to receive voltage signals, receive the first H-bridge control signal (PWM1) through the first signal receiving terminal (M1), receive the second H-bridge control signal (PWM2) through the second signal receiving terminal (M2), receive the third H-bridge control signal (PWM3) through the third signal receiving terminal (M3), and receive the fourth H-bridge control signal (PWM4) through the fourth signal receiving terminal (M4).

[0026] When the first H-bridge control signal (PWM1) and the second H-bridge control signal (PWM2) are both preset low-level signals, and the third H-bridge control signal (PWM3) and the fourth H-bridge control signal (PWM4) are both preset high-level signals, the lens is colored based on the voltage signal control; the amplitude of the preset low-level signal is lower than the amplitude of the preset high-level signal.

[0027] When the first H-bridge control signal (PWM1) and the second H-bridge control signal (PWM2) are both preset high-level signals, and the third H-bridge control signal (PWM3) and the fourth H-bridge control signal (PWM4) are both preset low-level signals, the lens is controlled to fade based on the voltage signal.

[0028] like Figure 4 As shown, PWM1, PWM2, PWM3, and PWM4 are H-bridge control signals, R1, R2, R3, and R4 are current-limiting resistors, LOAD+ and LOAD- are load interfaces, and VCC_L is the voltage signal output from the voltage control circuit 20 to the H-bridge drive circuit 30, used to power the load (e.g., a lens).

[0029] The following describes the working process of the photochromic control circuit for eyeglasses: 1. The MCU obtains the set voltage (the higher the set voltage, the faster the lens coloring speed. The depth of the lens color is related to the amount of charge inside the lens. The greater the charge, the deeper the color). After calculation by the MCU, a square wave control signal VCC_PWM with the corresponding duty cycle is obtained. 2. Voltage control circuit: The power supply voltage V_BAT+ input from the BAT+ terminal enters pin 2 of Q4, and controls pin 1 of Q4 through VCC_PWM, so that pin 3 of Q4 outputs a square wave signal. After passing through the RC filter circuit and integration circuit at the back end, the square wave signal can be converted into a stable DC voltage, namely VCC_L. The value of VCC_L can be adjusted by adjusting the duty cycle of VCC_PWM (through the voltage feedback circuit). 2. Voltage feedback circuit: The voltage signal VCC_L output by the voltage control circuit is monitored and fed back to the MCU. The MCU performs PID (proportional-integral-derivative) calculation based on the feedback VCC_L, thereby adjusting the duty cycle of the VCC_PWM square wave in real time to achieve stable output of VCC_L. 3. Coloring process: such as Figure 5 As shown, after VCC_L is stably output to the H-bridge driver circuit, PWM1 and PWM2 are pulled low to preset low-level signals, and PWM3 and PWM4 are pulled high to preset high-level signals. The resulting is current flows from the VCC_L receiving terminal of the H-bridge driver circuit to Q1, then to LOAD+, then through the load (i.e., the lens) to LOAD-, then to Q4, and finally to ground GND, thus forming a loop and achieving lens tinting, making the lens change from transparent to dark.

[0030] 4. The fading process: such as Figure 6 As shown, PWM3 and PWM4 are pulled low to preset low-level signals, and PWM1 and PWM2 are pulled high to preset high-level signals. The is current flows from the VCC_L receiving terminal of the H-bridge drive circuit to Q2 and then to LOAD-, through the load (i.e., the lens) to LOAD+ and then to Q3 and finally to ground GND, thus forming a loop, which realizes the fading of the lens. After fading, the lens becomes transparent.

[0031] In the photochromic control circuit for eyeglasses provided in this application, a microcontroller unit, a voltage control circuit, and an H-bridge drive circuit are connected sequentially. A voltage feedback circuit is connected to the output of the voltage control circuit and the microcontroller unit to feed back the acquired voltage control circuit output to the microcontroller unit. First, the microcontroller unit generates a control signal with a corresponding duty cycle based on a set voltage. Then, the voltage control circuit controls the on and off of the power supply voltage based on this control signal. When the power supply voltage is on, it outputs a voltage signal to the H-bridge drive circuit based on the power supply voltage. The H-bridge drive circuit can control the lens to change color based on this voltage signal and the H-bridge control signal. This application can achieve lens coloring / fading control through voltage closed-loop control, and the photochromic control circuit for eyeglasses is simple to implement and easy to mass-produce and apply.

[0032] In an exemplary embodiment, the eyeglass photochromic control circuit achieves closed-loop voltage regulation control through the switch control circuit 21 and the filter voltage regulator circuit 22 in the voltage control circuit, which can more stably control the coloring / fading process of the lens, thereby stably maintaining the coloring / fading effect.

[0033] This application also provides wearable photochromic glasses, including lenses and the aforementioned photochromic control circuit.

[0034] Optionally, the lens is made of electrode material. Lenses made of electrode material can be charged or discharged based on voltages of different polarities applied to the lens, thereby achieving coloring or fading of the lens.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A photochromic control circuit for eyeglasses, characterized in that, The photochromic control circuit for the glasses includes a microcontroller unit, a voltage control circuit, an H-bridge drive circuit, and a voltage feedback circuit, wherein: The signal input terminal of the voltage control circuit is connected to the microcontroller unit. The power input terminal of the voltage control circuit is used to receive the power supply voltage. The output terminal of the voltage control circuit is connected to the voltage input terminal of the H-bridge drive circuit and the feedback input terminal of the voltage feedback circuit. The feedback output terminal of the voltage feedback circuit is connected to the microcontroller unit. The signal receiving terminal of the H-bridge drive circuit is used to receive the H-bridge control signal. The load interface of the H-bridge drive circuit is connected to the lens. The microcontroller unit is used to receive a set voltage, generate a control signal with a corresponding duty cycle based on the set voltage, and output the control signal to the voltage control circuit. The voltage control circuit is used to receive the power supply voltage and the control signal, and control the power supply voltage to be turned on and off based on the control signal. When the control signal is a preset turn-on signal, it outputs voltage signals to the H-bridge drive circuit and the voltage feedback circuit respectively based on the power supply voltage. The voltage feedback circuit is used to receive the voltage signal and adjust the duty cycle of the control signal through a proportional-integral-derivative controller based on the voltage signal so that the control signal is output stably. The H-bridge drive circuit is used to receive the voltage signal and the H-bridge control signal, and control the lens to change color based on the voltage signal and the H-bridge control signal.

2. The photochromic control circuit for eyeglasses according to claim 1, characterized in that, The voltage control circuit includes a switching control circuit and a filtering and regulating circuit. The output terminal of the switching control circuit is connected to the input terminal of the filtering and regulating circuit. The output terminal of the filtering and regulating circuit is connected to the voltage input terminal of the H-bridge drive circuit and the feedback input terminal of the voltage feedback circuit, respectively. The switch control circuit is used to receive the power supply voltage and the control signal, and control the power supply voltage to be turned on and off based on the control signal; The filtering and voltage regulation circuit is used to filter and regulate the power supply voltage to obtain the voltage signal when the control signal is a preset conduction signal, and output the voltage signal to the H-bridge drive circuit and the voltage feedback circuit respectively.

3. The photochromic control circuit for eyeglasses according to claim 2, characterized in that, The switch control circuit includes a first resistor, a second resistor, and a PMOS transistor, wherein: One end of the first resistor is connected to the power input terminal of the voltage control circuit, and the other end of the first resistor is connected to the gate of the PMOS transistor. One end of the second resistor is connected to the signal input terminal of the voltage control circuit, and the other end of the second resistor is connected to the gate of the PMOS transistor; The source of the PMOS transistor is connected to the power input terminal of the voltage control circuit, and the drain of the PMOS transistor is connected to the filter and voltage regulator circuit.

4. The photochromic control circuit for eyeglasses according to claim 2, characterized in that, The filtering and voltage regulation circuit includes an RC filter circuit, an integral circuit, and an anti-floating circuit connected in sequence.

5. The photochromic control circuit for eyeglasses according to claim 4, characterized in that, The RC filter circuit includes a third resistor and a first capacitor, the integrating circuit includes a fourth resistor and a second capacitor, and the anti-floating circuit includes a fifth resistor, wherein: One end of the third resistor is connected to the switch control circuit, and the other end of the third resistor is connected to one end of the first capacitor and one end of the fourth resistor, respectively. The other end of the first capacitor is grounded. The other end of the fourth resistor is connected to one end of the second capacitor and one end of the fifth resistor, respectively, and the other end of the second capacitor is grounded; One end of the fifth resistor is also connected to the output terminal of the filter and voltage regulator circuit, and the other end of the fifth resistor is grounded.

6. The photochromic control circuit for eyeglasses according to claim 1, characterized in that, The voltage feedback circuit includes a sixth resistor and a third capacitor, wherein: One end of the sixth resistor is connected to the feedback output terminal of the voltage feedback circuit, and the other end of the sixth resistor is connected to one end of the third capacitor and the feedback input terminal of the voltage feedback circuit, respectively. The other end of the third capacitor is grounded.

7. The photochromic control circuit for eyeglasses according to claim 1, characterized in that, The H-bridge driver circuit has a signal terminal and a fourth signal receiving terminal; the load interface of the H-bridge driver circuit includes a first load interface and a second load receiving terminal includes a first signal receiving terminal, a second signal receiving terminal, and a third signal receiving interface; The H-bridge drive circuit includes a seventh resistor, a first PNP transistor, an eighth resistor, a first NPN transistor, a ninth resistor, a second PNP transistor, a tenth resistor, and a second NPN transistor, wherein: One end of the seventh resistor is connected to the first signal receiving terminal, and the other end of the seventh resistor is connected to the base of the first PNP transistor; one end of the eighth resistor is connected to the second signal receiving terminal, and the other end of the eighth resistor is connected to the base of the first NPN transistor; one end of the ninth resistor is connected to the third signal receiving terminal, and the other end of the ninth resistor is connected to the base of the second PNP transistor; one end of the tenth resistor is connected to the fourth signal receiving terminal, and the other end of the tenth resistor is connected to the base of the second NPN transistor. The emitter of the first PNP transistor is connected to the voltage input terminal of the H-bridge driver circuit, and the collector of the first PNP transistor is connected to the first load interface; the collector of the first NPN transistor is connected to the first load interface, and the emitter of the first NPN transistor is grounded; the emitter of the second PNP transistor is connected to the voltage input terminal of the H-bridge driver circuit, and the collector of the second PNP transistor is connected to the second load interface; the collector of the second NPN transistor is connected to the second load interface, and the emitter of the second NPN transistor is grounded.

8. The photochromic control circuit for eyeglasses according to claim 7, characterized in that, The H-bridge control signals include a first H-bridge control signal, a second H-bridge control signal, a third H-bridge control signal, and a fourth H-bridge control signal; The H-bridge driving circuit is specifically used to receive the voltage signal, receive the first H-bridge control signal through the first signal receiving terminal, receive the second H-bridge control signal through the second signal receiving terminal, receive the third H-bridge control signal through the third signal receiving terminal, and receive the fourth H-bridge control signal through the fourth signal receiving terminal. When both the first H-bridge control signal and the second H-bridge control signal are preset low-level signals, and both the third H-bridge control signal and the fourth H-bridge control signal are preset high-level signals, the lens is tinted based on the voltage signal; the amplitude of the preset low-level signal is lower than the amplitude of the preset high-level signal. When both the first H-bridge control signal and the second H-bridge control signal are the preset high-level signals, and both the third H-bridge control signal and the fourth H-bridge control signal are the preset low-level signals, the lens is controlled to fade based on the voltage signal.

9. A type of wearable photochromic glasses, characterized in that, It includes lenses and a photochromic control circuit for eyeglasses as claimed in any one of claims 1-8.

10. The wearable photochromic glasses according to claim 9, characterized in that, The lens is made of electrode material.

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