Rechargeable shutter 3D glasses

Abstract

The utility model is suitable for the field of 3D glasses, and provides a pair of rechargeable shutter 3D glasses, which comprises a glasses frame, glasses legs, liquid crystal light valve type lenses and a liquid crystal driving circuit, and a charging circuit is arranged on the glasses frame or the glasses legs; the charging circuit comprises a mirror body magnetic suction connector which is provided with a magnetic suction end and is used for being sucked with a first magnetic suction connector on a charging seat through the magnetic suction end; the mirror body magnetic connector is further provided with a positive electrode and a negative electrode, and after the magnetic end is attracted to the first magnetic connector, the positive electrode and the negative electrode are electrically connected with the positive electrode and the negative electrode of the first magnetic connector respectively; the capacity of the super capacitor is greater than or equal to 1 farad; a controllable switch assembly; and the charging control circuit is connected with the control end of the controllable switch assembly and is used for controlling the on-off of the controllable switch assembly. According to the utility model, the super capacitor in the 3D glasses can be rapidly charged, and charging can be completed within several minutes.

Description

Technical Field

[0001] The utility model belongs to the field of 3D glasses, and in particular relates to a rechargeable shutter 3D glasses, which can be recharged quickly and repeatedly and are suitable for watching 3D movies in theaters or at home. Background Art

[0002] Active shutter 3D glasses have been used in movie screenings for many years. During use, the battery often runs out or the 3D glasses do not work, which is difficult for cinema staff to determine with naked eyes. Daily replacement of button batteries for active shutter 3D glasses brings extra workload and battery consumables costs to cinemas, and cinema operators are usually resistant to battery shutter 3D glasses. Therefore, it is necessary to develop a rechargeable shutter 3D glasses to solve these problems in cinema operations. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to realize rechargeable shutter 3D glasses.

[0004] In order to solve the above technical problems, the utility model is implemented as follows: a rechargeable shutter 3D glasses, comprising a frame, temples, a liquid crystal light valve lens fixed in the frame, and a liquid crystal driving circuit for driving the liquid crystal light valve lens, wherein a charging circuit is arranged on the frame or the temples, and the charging circuit comprises:

[0005] The mirror body magnetic connector has a magnetic end, which is used to engage with the first magnetic connector on the charging base through the magnetic end; the mirror body magnetic connector also has a positive pole and a negative pole, and when the magnetic end is engaged with the first magnetic connector, the positive pole and the negative pole are electrically connected to the positive pole and the negative pole of the first magnetic connector respectively;

[0006] Supercapacitors are used to store electrical energy, with a capacitance greater than or equal to 1 Farad;

[0007] A controllable switch component is connected between the mirror body magnetic connector and the super capacitor. When the controllable switch component is turned on, the charging base charges the super capacitor through the mirror body magnetic connector. When the controllable switch component is turned off, the charging base stops charging the super capacitor.

[0008] The charging control circuit is connected to the control end of the controllable switch component and is used to control the on and off of the controllable switch component.

[0009] Furthermore, the charging circuit also includes: a resistor R1, connected between the positive pole and the negative pole of the mirror body magnetic connector, used to form an additional discharge circuit after the magnetic end is attracted to the first magnetic connector.

[0010] Furthermore, the charging control circuit includes: a main controller having a detection end and a control signal output end, the detection end is connected to the supercapacitor, and the control signal output end is connected to the control end of the controllable switch component, and is used to control the on and off of the controllable switch component according to the detected power of the supercapacitor.

[0011] Furthermore, the controllable switch component is an NMOS tube, whose source is connected to the negative electrode of the mirror body magnetic connector, the drain is connected to the negative electrode of the supercapacitor, and the gate serves as the control end; the charging control circuit also includes: a resistor R12, connected between the positive electrode of the mirror body magnetic connector and the gate of the NMOS tube; a resistor R13, connected between the control signal output end of the main controller and the gate of the NMOS tube; wherein the resistance value of the resistor R12 is much greater than the resistance value of the resistor R13.

[0012] Furthermore, the charging control circuit also includes a diode D1; the anode of the diode D1 is connected to the positive pole of the mirror body magnetic connector, and the cathode is connected to the positive pole of the supercapacitor; or the anode of the diode D1 is connected to the negative pole of the supercapacitor, and the cathode is connected to the drain of the NMOS tube; or the anode of the diode D1 is connected to the source of the NMOS tube, and the cathode is connected to the negative pole of the mirror body magnetic connector.

[0013] Furthermore, the controllable switch component is a PMOS tube, whose source is connected to the positive electrode of the mirror body magnetic connector, the drain is connected to the positive electrode of the supercapacitor, and the gate serves as the control end; the charging control circuit also includes: a resistor R21, which is connected between the control signal output end of the main controller and the ground.

[0014] Furthermore, the charging control circuit also includes a diode D2; the anode of the diode D2 is connected to the positive pole of the mirror body magnetic connector, and the cathode is connected to the source of the PMOS tube; or the anode of the diode D2 is connected to the drain of the PMOS tube, and the cathode is connected to the positive pole of the supercapacitor; or the anode of the diode D2 is connected to the negative pole of the supercapacitor, and the cathode is connected to the negative pole of the mirror body magnetic connector.

[0015] Furthermore, when the main controller detects that the voltage of the supercapacitor is higher than a preset first threshold, the main controller controls the controllable switch component to be disconnected; when the main controller detects that the voltage of the supercapacitor is lower than a preset second threshold, the main controller controls the controllable switch component to be turned on.

[0016] Furthermore, the main controller is also connected to the liquid crystal drive circuit, and is used to send a low-battery reminder instruction to the liquid crystal drive circuit when it detects that the voltage of the supercapacitor is lower than a preset third threshold value, so that the liquid crystal drive circuit controls the liquid crystal light valve lens to flash; the liquid crystal drive circuit is also connected to the supercapacitor and is powered by the supercapacitor.

[0017] Furthermore, the frame or the temple is also provided with: a synchronization signal receiving circuit, which is connected to the super capacitor and the main controller and powered by the super capacitor. After receiving the 3D synchronization signal, a synchronization instruction is sent to the main controller so that the main controller performs synchronous control on the liquid crystal drive circuit.

[0018] The shutter-type 3D glasses provided by the utility model use supercapacitors to store electrical energy and can be used with a dedicated charging cabinet. When the magnetic connector on the glasses is electrically connected to the charging seat on the charging cabinet, the supercapacitor can be quickly charged, and the charging process can be completed within a few minutes. During daily screenings, the 3D glasses can be fully charged during the clearing time between two movies, which greatly facilitates the daily use of the shutter-type 3D glasses in the cinema. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the appearance of the rechargeable 3D glasses provided by the utility model;

[0020] Figure 2 This is the schematic diagram of the rechargeable 3D glasses module provided by the utility model;

[0021] Figure 3 It is a charging curve diagram of the rechargeable 3D glasses provided by the utility model;

[0022] Figure 4 is a circuit diagram of a charging circuit provided in Embodiment 1 of the present utility model;

[0023] Figure 5 It is a circuit diagram of a charging circuit provided in Embodiment 2 of the present utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] The shutter 3D glasses provided by the utility model can be repeatedly and quickly charged. Figure 1 , Figure 2The rechargeable 3D glasses include a frame 1, temples 2, liquid crystal light valve lenses 3, and a liquid crystal drive circuit 4, wherein the liquid crystal light valve lenses 3 are fixed in the frame 1, and the number is two. Figure 1 Marked with A and B, the liquid crystal driving circuit 4 is used to drive two liquid crystal light valve lenses so that the two lenses alternately pass through the images displayed on the 3D screen or reflected on the screen. For example, at the current moment, the left eye image passes through the lens A but not through the lens B, and at the next moment, the right eye image passes through the lens B but not through the lens A.

[0026] The rechargeable 3D glasses also have a built-in charging circuit, which includes several components, each of which can be specifically arranged on the frame 1 or the temple 2. Figure 1 , Figure 2 The charging circuit includes a mirror body magnetic connector 5, a super capacitor C, a controllable switch component 6, and a charging control circuit 7.

[0027] The mirror body magnetic connector 5 has a magnetic end 51, which is used to engage with the first magnetic connector on the charging base through the magnetic end 51. In addition, the mirror body magnetic connector 5 also has a positive pole 52 and a negative pole 53. When the magnetic end 51 is engaged with the first magnetic connector, the positive pole 52 and the negative pole 53 are electrically connected to the positive pole and the negative pole of the first magnetic connector respectively. The specific position of the mirror body magnetic connector 5 can be set at any position on the temple 1 and the frame 2, for example Figure 1 The inner side of the connecting portion between the two lenses of the frame shown facing the bridge of the nose may also be arranged on the upper side or outer side of the connecting portion between the two lenses, without limitation.

[0028] Figure 1 and Figure 2 The number of magnetic ends 51 shown in the figure is two. In the specific implementation, the number of magnetic ends 51 can be flexibly designed as needed, as long as the mirror body magnetic connector 5 and the first magnetic connector of the charging base can be firmly attracted together. The first magnetic connector also has the same number of magnetic ends, and corresponds one to one with the magnetic ends 51 on the mirror body magnetic connector 5. Of the two, the mirror body magnetic connector 5 and the first magnetic connector, one is a magnetic part, and the other is an iron material that can be adsorbed by the magnetic part or a magnetic part with opposite magnetism. The first magnetic connector also has a positive pole and a negative pole, which are opposite to the positions of the positive pole 52 and the negative pole 53 of the mirror body magnetic connector 51.

[0029] The supercapacitor C is used to store electrical energy, and the capacitance is greater than or equal to 1 Farad (F).

[0030] The controllable switch component 6 is connected between the mirror body magnetic connector 5 and the supercapacitor C. When the controllable switch component 6 is turned on, the charging base charges the supercapacitor C through the mirror body magnetic connector 5. When the controllable switch component 6 is disconnected, the charging base stops charging the supercapacitor C.

[0031] The charging control circuit 7 is connected to the control end of the controllable switch component 6 and is used to control the on and off of the controllable switch component 6 .

[0032] Compared with lithium batteries, supercapacitor C, as an energy storage element, has a faster charge and discharge speed, allows a larger charge and discharge current, and can be repeatedly charged and discharged up to a million times, which is much greater than the 1,000 times of lithium-ion batteries. Through circuit optimization, the power consumption of shutter 3D glasses during normal operation can be controlled at around 1mW. Taking a supercapacitor with an operating voltage range of 2.5 to 3.8V as an example, the capacitance value is 20F, and the discharge range is 2.5 to 3.8V, then the amount of electricity that can be stored is (3.8V-2.5V)*20F=26C (coulomb). The maximum charge and discharge current allowed is 200mA, and the fastest time to charge from 2.5V to 3.8V is only 26C÷0.2A=130 seconds. Figure 3 The charging curve of supercapacitor C under constant voltage charging condition with a starting voltage of 2.5V is given. The starting charging current is about 175mA. It takes 280 to 290 seconds to charge from 2.5V to 3.8V, which is no more than 5 minutes. According to the average current of 0.4mA when 3D glasses are working, 26 coulombs of electricity can meet 65,000 seconds of continuous operation, that is, 18 hours. Calculated based on 2.5 hours per movie, it can meet the viewing of 7 consecutive 3D movies. Since the supercapacitor C allows up to 1 million times of charge and discharge, over-discharge or long-term non-charging will not cause the problem of being unable to charge like lithium batteries, so there will be no abnormal battery failure.

[0033] In the daily operation of the cinema, the rechargeable shutter 3D glasses provided by the new model are placed on the magnetic charging seat of the charging cabinet after all the screenings are over every day. When used the next day, the battery is fully charged. At the same time, the 3D glasses are placed in the charging cabinet for a long time for charging, and the voltage will not exceed the voltage limit or the battery will fail, which solves the pain points of using 3D glasses in cinema operations. Even if the 3D glasses are low in power, the glasses can be fully charged after being placed in the charging cabinet for 5 minutes, which greatly facilitates the daily operation of the cinema.

[0034] The above-mentioned charging control circuit 7 can be implemented by a main controller such as MCU, which has a detection end and a control signal output end. The detection end is connected to the supercapacitor C, and the control signal output end is connected to the control end of the controllable switch component 6, which is used to control the on and off of the controllable switch component 6 according to the detected power of the supercapacitor C.

[0035] The controllable switch assembly 6 can be made of various types of switch components, such as triodes, MOS tubes, etc., or a combination of switch components. The following uses two embodiments as examples to illustrate the working principle of the controllable switch assembly 6 and the charging control circuit 7.

[0036] Embodiment 1

[0037] like Figure 4 As shown, the controllable switch component 6 is an NMOS tube M1, whose source is connected to the negative electrode 53 of the mirror body magnetic connector 5, the drain is connected to the negative electrode of the super capacitor C, and the gate serves as the control end.

[0038] The charging control circuit 7 also includes a resistor R12 and a resistor R13. The resistor R12 is connected between the positive electrode 52 of the mirror body magnetic connector 5 and the gate of the NMOS tube M1; the resistor R13 is connected between the control signal output terminal of the main controller 71 and the gate of the NMOS tube M1. The gate of the NMOS tube M1 is connected to the positive electrode 52 of the mirror body magnetic connector 5 through the resistor R12 to ensure that the gate of the NMOS tube M1 is at a high level and the NMOS tube M1 is in a conducting state when there is a voltage between the positive and negative electrodes of the mirror body magnetic connector 5.

[0039] In addition, the charging control circuit 7 may further include a diode D1, the anode of the diode D1 is connected to the positive electrode 52 of the mirror body magnetic connector 5, and the cathode is connected to the positive electrode Vcap+ of the super capacitor C. The diode D1 is used to prevent the super capacitor C from discharging when the positive and negative electrodes of the mirror body magnetic connector 5 are short-circuited.

[0040] When the voltage across the supercapacitor C reaches its rated voltage, the charging is considered complete. The main controller 71 compares the obtained voltage of the supercapacitor C with the internal preset voltage threshold. When the voltage of the supercapacitor C is higher than the preset first threshold, the main controller 71 outputs a low-level signal to the gate of the NMOS tube M1. Since the resistance of the resistor R12 is much greater than the resistance of the resistor R13, for example, the resistor R12 is 100KΩ, and the resistor R13 is equal to 100Ω, the gate voltage of the NMOS tube M1 is close to 0V, the NMOS tube M1 is disconnected, and the entire charging circuit is disconnected. When the main controller 71 monitors that the obtained voltage of the supercapacitor C is lower than the internal preset second threshold, the main controller 71 outputs a high-level signal to the gate of the NMOS tube M1. At this time, the gate of the NMOS tube M1 is high level, and the NMOS tube M1 is in the on state.

[0041] Those skilled in the art can understand that the resistance of the resistor R12 mentioned above is much greater than the resistance of the resistor R13, which is a relative concept in physics. The resistance of the resistor R12 can be tens, hundreds or thousands of times that of the resistor R13, which is related to the parameters of the entire circuit, especially the voltage between the two electrodes of the mirror magnetic connector 5. It is required that the voltage division of the resistor R13 does not cause the NMOS tube M1 to be turned on.

[0042] In the first embodiment, the resistor R1 is used as an additional discharge circuit and is connected to the positive and negative ends of the mirror body magnetic connector 5. Regardless of whether the NMOS tube M1 of the subsequent stage is turned on or not, the resistor R1 will form a current loop, and a fixed current will be generated on the resistor R1. Figure 4 As shown by the arrow above R1 in the figure. This fixed current is used to detect the current in the charging cradle circuit, which facilitates the logic judgment of the charging cradle circuit. Typically, when 3D glasses are placed on the charging cradle, the positive and negative electrodes of the charging cradle circuit are connected to the positive and negative electrodes of the 3D glasses circuit. Even if the NMOS tube M1 is in the off state, it can be judged that glasses are placed based on the current on the resistor R1. If no 3D glasses are placed on the charging cradle circuit, no current flows through the two ends of the charging cradle connector, so it can be judged whether there are glasses on the charging cradle based on whether there is current.

[0043] When the 3D glasses are removed from the charging station, due to the presence of diode D1, the current is only allowed to flow in one direction, such as Figure 1 As shown by the arrow to the right of D1, the resistor R1 cannot form a loop, so it will not consume the energy in the supercapacitor C. At this time, the power supply of the entire 3D glasses is provided by the supercapacitor C, Vcap+ is the positive electrode, and Vcap- is the negative electrode, such as Figure 2 The liquid crystal driving circuit 4 and the synchronization signal receiving circuit 8 shown in the figure are both powered by the super capacitor C.

[0044] In the first embodiment, the position of the diode D1 can be changed, and it can be changed to be located between the negative electrode Vcap- of the super capacitor C and the NMOS tube M1, with the anode of the diode D1 connected to the negative electrode Vcap- of the super capacitor C and the cathode of the diode D1 connected to the drain of the NMOS tube M1, or it can be changed to be located between the negative electrode 53 of the mirror body magnetic suction connector 5 and the NMOS tube M1, with the anode of the diode D1 connected to the source of the NMOS tube M1 and the cathode connected to the negative electrode 53 of the mirror body magnetic suction connector 5. The two positions of the diode D1 are Figure 4 Shown in dotted line form.

[0045] Embodiment 2

[0046] like Figure 5 As shown, the controllable switch component 6 is a PMOS tube M2, whose source is connected to the positive electrode 52 of the mirror body magnetic connector 5, the drain is connected to the positive electrode of the super capacitor C, and the gate serves as the control end.

[0047] The charging control circuit 7 also includes: a resistor R21, which is connected between the control signal output terminal of the main controller 72 and the ground (GND) to ensure that at the moment of the voltage on the positive pole 52 and the cathode 53 of the magnetic connector 5, the gate of the PMOS tube M2 is at a low level and the PMOS tube M2 is in a conducting state.

[0048] In addition, the charging control circuit 7 may further include a diode D2, the anode of the diode D2 is connected to the positive electrode 52 of the mirror body magnetic connector 5, and the cathode is connected to the source of the PMOS tube M2. The diode D2 is used to prevent the super capacitor C from discharging when the positive and negative electrodes of the mirror body magnetic connector 5 are short-circuited.

[0049] When the supercapacitor is fully charged, the voltage of the supercapacitor C obtained by the main controller 72 will be higher than the first threshold value preset internally, and the main controller 72 outputs a high-level signal to the gate of the PMOS tube M2. Since the resistor R21 is relatively large, such as 100KΩ, the gate voltage of the PMOS tube M2 is close to being at a high level, the PMOS tube M2 is disconnected, and the entire charging circuit is disconnected. When the voltage of the supercapacitor C is lower than the second threshold value preset internally, the main controller 72 outputs a low-level signal to the gate of the PMOS tube M2, the gate of the PMOS tube M2 is at a low level, and the PMOS tube M2 is in a conducting state. At this time, if the 3D glasses are placed on the charging base, charging begins.

[0050] In the second embodiment, the resistor R1 is used as an additional discharge circuit and is connected to the positive and negative ends of the magnetic connector 5. Regardless of whether the subsequent PMOS tube M2 is turned on or not, the resistor R1 will form a current loop, and a fixed current will be generated on the resistor R1. Figure 5 As shown by the arrow below R1.

[0051] When the 3D glasses are removed from the charging station, due to the presence of diode D2, the current is only allowed to flow in one direction, such as Figure 5 As shown by the arrow to the right of the diode D2, the resistor R1 cannot form a loop, so it will not consume the energy in the supercapacitor C. At this time, the power supply of the entire 3D glasses is provided by the supercapacitor C, Vcap+ is the positive electrode, and Vcap- is the negative electrode. In order to ensure that the PMOS tube M2 can be completely turned off, the voltage controlling its gate needs to be high enough, so it is best to use a dedicated MOS tube driver or build a boost circuit.

[0052] In the second embodiment, the front and rear positions of the PMOS tube M2 and the diode D2 are interchangeable, that is, the anode of the diode D2 is connected to the drain of the PMOS tube, and the cathode is connected to the positive electrode Vcap+ of the super capacitor C. The diode D2 can also be transformed to be located between the negative electrode Vcap- of the super capacitor C and the negative electrode 53 of the magnetic connector 5, but it needs to be located below the resistor R1, that is, the anode of the diode D2 is connected to the negative electrode of the super capacitor, and the cathode is connected to the negative electrode 53 of the mirror body magnetic connector 5. The two positions of the diode D2 are Figure 5 Shown in dotted line form.

[0053] The main controller with MCU as the main device is usually integrated with an ADC conversion function, which can convert analog signals into digital signals. Therefore, in the first and second embodiments, the ADC of the main controller 71 / 72 is used as a part of the charging control circuit 7 to detect the voltage across the supercapacitor C. If the selected MCU does not have an ADC function, an independent ADC device is required to detect the voltage of the supercapacitor C.

[0054] Continue reading Figure 2 The main controller is also connected to the liquid crystal drive circuit 4, and is used to send a low-battery reminder instruction to the liquid crystal drive circuit 4 when it detects that the voltage of the super capacitor C is lower than a preset third threshold value, so that the liquid crystal drive circuit 4 controls the liquid crystal light valve lens 3 to flash, and the user can know that the glasses are low on battery. The liquid crystal drive circuit 4 is also connected to the super capacitor C and is powered by the super capacitor C.

[0055] Figure 2 In the embodiment, a synchronization signal receiving circuit 8 is also provided on the frame or the temple, which is connected to the super capacitor C and the main controller and powered by the super capacitor C. After receiving the 3D synchronization signal, a synchronization instruction is sent to the main controller so that the main controller can synchronously control the liquid crystal drive circuit 4. For example, when the left eye image is played at the current moment, the main controller sends an instruction to the liquid crystal drive circuit 4, and the liquid crystal drive circuit 4 controls only the lens A corresponding to the left eye to pass the left eye image. Conversely, if the right eye image is played at the current moment, the main controller sends an instruction to the liquid crystal drive circuit 4, and the liquid crystal drive circuit 4 controls only the lens B corresponding to the right eye to pass the right eye image.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rechargeable shutter 3D glasses, comprising a frame, temples, a liquid crystal light valve lens fixed in the frame, and a liquid crystal driving circuit for driving the liquid crystal light valve lens, characterized in that: The frame or the temples are provided with a charging circuit, and the charging circuit comprises: The mirror body magnetic connector has a magnetic end, which is used to engage with the first magnetic connector on the charging base through the magnetic end; the mirror body magnetic connector also has a positive pole and a negative pole, and when the magnetic end is engaged with the first magnetic connector, the positive pole and the negative pole are electrically connected to the positive pole and the negative pole of the first magnetic connector respectively; Supercapacitors are used to store electrical energy, with a capacitance greater than or equal to 1 Farad; A controllable switch component is connected between the mirror body magnetic connector and the super capacitor. When the controllable switch component is turned on, the charging base charges the super capacitor through the mirror body magnetic connector. When the controllable switch component is turned off, the charging base stops charging the super capacitor. The charging control circuit is connected to the control end of the controllable switch component and is used to control the on and off of the controllable switch component.

2. The rechargeable shutter 3D glasses according to claim 1, characterized in that: The charging circuit further comprises: The resistor R1 is connected between the positive electrode and the negative electrode of the mirror body magnetic connector, and is used to form an additional discharge circuit after the magnetic end is attracted to the first magnetic connector.

3. The rechargeable shutter 3D glasses according to claim 1, characterized in that: The charging control circuit comprises: The main controller has a detection end and a control signal output end, the detection end is connected to the super capacitor, and the control signal output end is connected to the control end of the controllable switch component, and is used to control the on and off of the controllable switch component according to the detected power of the super capacitor.

4. The rechargeable shutter 3D glasses according to claim 3, characterized in that: The controllable switch component is an NMOS tube, the source of which is connected to the negative electrode of the mirror body magnetic connector, the drain is connected to the negative electrode of the super capacitor, and the gate serves as the control end; The charging control circuit further includes: A resistor R12 is connected between the positive electrode of the mirror body magnetic connector and the gate of the NMOS tube; A resistor R13 is connected between the control signal output terminal of the main controller and the gate of the NMOS tube; The resistance of the resistor R12 is much greater than the resistance of the resistor R13.

5. The rechargeable shutter 3D glasses according to claim 4, characterized in that: The charging control circuit also includes a diode D1; The anode of the diode D1 is connected to the positive electrode of the mirror body magnetic connector, and the cathode is connected to the positive electrode of the super capacitor; or The anode of the diode D1 is connected to the negative electrode of the super capacitor, and the cathode is connected to the drain of the NMOS tube; or The anode of the diode D1 is connected to the source of the NMOS tube, and the cathode is connected to the negative pole of the mirror body magnetic connector.

6. The rechargeable shutter 3D glasses according to claim 3, characterized in that: The controllable switch component is a PMOS tube, the source of which is connected to the positive electrode of the mirror body magnetic connector, the drain is connected to the positive electrode of the super capacitor, and the gate serves as the control end; The charging control circuit further includes: The resistor R21 is connected between the control signal output terminal of the main controller and the ground.

7. The rechargeable shutter 3D glasses according to claim 6, characterized in that: The charging control circuit also includes a diode D2; The anode of the diode D2 is connected to the positive electrode of the mirror body magnetic connector, and the cathode is connected to the source of the PMOS tube; or The anode of the diode D2 is connected to the drain of the PMOS tube, and the cathode is connected to the positive electrode of the super capacitor; or The anode of the diode D2 is connected to the negative electrode of the super capacitor, and the cathode is connected to the negative electrode of the mirror body magnetic connector.

8. The rechargeable shutter 3D glasses according to claim 3, characterized in that: When the main controller detects that the voltage of the supercapacitor is higher than a preset first threshold, the main controller controls the controllable switch component to be disconnected; when the main controller detects that the voltage of the supercapacitor is lower than a preset second threshold, the main controller controls the controllable switch component to be turned on.

9. The rechargeable shutter 3D glasses according to claim 3, characterized in that: The main controller is also connected to the liquid crystal drive circuit, and is used to send a low power reminder instruction to the liquid crystal drive circuit when detecting that the voltage of the super capacitor is lower than a preset third threshold value, so that the liquid crystal drive circuit controls the liquid crystal light valve lens to flash; The liquid crystal driving circuit is also connected to the super capacitor and is powered by the super capacitor.

10. The rechargeable shutter 3D glasses according to claim 3, characterized in that: The mirror frame or the mirror legs are also provided with: The synchronization signal receiving circuit is connected to the super capacitor and the main controller and is powered by the super capacitor. After receiving the 3D synchronization signal, the circuit sends a synchronization instruction to the main controller so that the main controller performs synchronization control on the liquid crystal driving circuit.

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