Driving circuit and control method of sun glasses with variable-color lenses

Abstract

The invention discloses a driving circuit and a control method of sun glasses with variable-color lenses, and relates to the field of variable-color lenses, the driving circuit comprises a variable-color lens equivalent circuit, an MOS tube Q1, an MOS tube Q2, an MOS tube Q3 and an MOS tube Q4; the first end of the MOS tube Q1 receives a first square wave signal, the second end of the MOS tube Q1 is connected with the power supply and the second end of the MOS tube Q3, and the third end of the MOS tube Q1 is connected with one end of the color-changeable lens equivalent circuit and the third end of the MOS tube Q2; the first end of the MOS tube Q2 is opened, and the second end of the MOS tube Q2 is respectively connected with the second end of the MOS tube Q4 and the ground; the first end of the MOS tube Q4 receives a fourth square wave signal, and the third end of the MOS tube Q4 is connected with the other end of the color-changeable lens equivalent circuit and the third end of the MOS tube Q3; the first end of the MOS tube Q3 receives a third square wave signal, and the square wave signal is generated by the microcontroller. According to the invention, rapid coloring and color fading of the photochromic lenses in the sunglasses can be realized through a simple circuit.

Description

Technical Field

[0001] The present application relates to the field of photochromic lenses, and in particular to a driving circuit and a control method for photochromic lens sunglasses. Background Art

[0002] Traditional lens color-changing solutions basically control the degree of lens tinting by controlling the driving current. However, controlling the current requires more complex control circuits and sampling circuits, and it is not allowed to add too many control circuits on wearable devices such as glasses. Summary of the invention

[0003] Based on this, the present application provides a driving circuit and control method for sunglasses with variable color lenses with a simple structure.

[0004] To achieve the above objectives, this application provides the following solutions:

[0005] In a first aspect, the present application provides a driving circuit for color-changing lens sunglasses, including: a color-changing lens equivalent circuit, a MOS tube Q1, a MOS tube Q2, a MOS tube Q3, and a MOS tube Q4;

[0006] The first end of the MOS tube Q1 receives the first square wave signal, the second end of the MOS tube Q1 is respectively connected to the power supply and the second end of the MOS tube Q3, and the third end of the MOS tube Q1 is respectively connected to one end of the color-changing lens equivalent circuit and the third end of the MOS tube Q2; the first end of the MOS tube Q2 is opened, and the second end of the MOS tube Q2 is respectively connected to the second end of the MOS tube Q4 and the ground; the first end of the MOS tube Q4 receives the fourth square wave signal, and the third end of the MOS tube Q4 is respectively connected to the other end of the color-changing lens equivalent circuit and the third end of the MOS tube Q3; the first end of the MOS tube Q3 receives the third square wave signal.

[0007] In a second aspect, the present application provides a control method for color-changing lens sunglasses, the control method being applied to the driving circuit of the above-mentioned color-changing lens sunglasses, the control method comprising: color-changing lens tinting control and color-changing lens fading control;

[0008] The process of controlling the tinting of the color-changing lens is as follows: the first end of the MOS tube Q1 receives the first square wave signal, the MOS tube Q4 is turned on, the MOS tube Q2 and the MOS tube Q3 are turned off, a voltage drop is generated at both ends of the load Load, and the color-changing lens is tinted;

[0009] The process of controlling the fading of the color-changing lens is as follows: MOS tube Q1 and MOS tube Q4 are turned off, the first end of MOS tube Q2 is turned on, the first end of MOS tube Q3 receives a third wave signal, MOS tube Q2 and MOS tube Q3 are turned on, and a voltage reverse to the original voltage is generated at both ends of the load Load, and the color-changing lens fades.

[0010] According to the specific embodiments provided in this application, this application has the following technical effects:

[0011] The driving circuit and control method of the color-changing lens sunglasses provided in the present application control the charging voltage of the color-changing lens equivalent circuit through MOS tubes Q1~Q4 to realize the coloring and fading of the color-changing lenses, omitting the complex sampling circuit and making the circuit structure simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 A schematic diagram of the structure of a driving circuit for color-changing lens sunglasses provided in one embodiment of the present application;

[0014] Figure 2 A schematic diagram of tinting control of a variable color lens provided in one embodiment of the present application;

[0015] Figure 3 A schematic diagram of fading control of a photochromic lens provided in one embodiment of the present application. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0017] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] In an exemplary embodiment, Figure 1As shown, a driving circuit for a color-changing lens sunglasses is provided, including: a color-changing lens equivalent circuit, a MOS tube Q1, a MOS tube Q2, a MOS tube Q3 and a MOS tube Q4. The MOS tube Q1, the MOS tube Q2, the MOS tube Q3 and the MOS tube Q4 form an H-bridge circuit. The two ends of the color-changing lens equivalent circuit do not distinguish between positive and negative poles.

[0019] The first end of MOS tube Q1 receives the first square wave signal CTL1, the second end of MOS tube Q1 is respectively connected to the power supply and the second end of MOS tube Q3, the third end of MOS tube Q1 is respectively connected to one end of the color-changing lens equivalent circuit and the third end of MOS tube Q2; the first end of MOS tube Q2 opens CTL2, the second end of MOS tube Q2 is respectively connected to the second end of MOS tube Q4 and the ground; the first end of MOS tube Q4 receives the fourth square wave signal CTL4, the third end of MOS tube Q4 is respectively connected to the other end of the color-changing lens equivalent circuit and the third end of MOS tube Q3; the first end of MOS tube Q3 receives the third square wave signal CTL3. The first square wave signal CTL1, the second square wave signal CTL2, the third square wave signal CTL3 and the fourth square wave signal CTL4 are all generated by the microcontroller.

[0020] In a specific embodiment, the color-changing lens equivalent circuit includes a capacitor C1 and a load Load; one end of the capacitor C1 and one end of the load Load are both connected to the third end of the MOS tube Q1, and the other end of the capacitor C1 and the other end of the load Load are both connected to the third end of the MOS tube Q4.

[0021] In an exemplary embodiment, based on the driving circuit of the above-mentioned color-changing lens sunglasses, the present application provides a control method for color-changing lens sunglasses, including color-changing lens tinting control and color-changing lens fading control.

[0022] like Figure 2 As shown, the process of controlling the tinting of the variable color lens is as follows: the first end of the MOS tube Q1 receives the first square wave signal, the MOS tube Q4 is turned on, the MOS tube Q2 and the MOS tube Q3 are turned off, and a voltage drop is generated at the two ends of the load Load PAD1 and PAD2, and the variable color lens is tinted. The tinting speed depends on the duty cycle of the first square wave. The larger the duty cycle, the higher the voltage and current, and the faster the tinting speed.

[0023] like Figure 3As shown, the fading control process of the color-changing lens is as follows: MOS tubes Q1 and Q4 are turned off, the first end of MOS tube Q2 is turned on, the first end of MOS tube Q3 receives the third wave signal, MOS tubes Q2 and Q3 are turned on, and the two ends of the load PAD1 and PAD2 generate a voltage opposite to the original voltage, and the color-changing lens fades. The fading speed depends on the duty cycle of the third wave signal.

[0024] The coloring speed of the color-changing lens is related to the charging speed of the capacitor C1, so the coloring speed can be controlled by controlling the charging voltage. Because the structural space is limited and the circuit is relatively simple, it is impossible to perform complex current and voltage sampling. Therefore, this application adopts an open-loop control method and uses the integral of voltage over time to control the charging amount. The equivalent circuit of the color-changing lens does not distinguish between positive and negative poles. The color-changing lens can be charged in the forward direction and in the reverse direction. Therefore, it can be colored by forward charging and reverse charging. When the forward charging is completed, if you want to fade quickly, use reverse charging to achieve the effect of fast fading. However, the charging voltage for reverse fading must be controlled well, and the charging time cannot be too long. If it is too long, it will cause the effect of fast coloring after fading, and fading cannot be achieved. Therefore, the amount of electricity currently in the color-changing lens is calculated by using the integral of voltage over time. When fading, the time and voltage of reverse charging can be controlled well to achieve the effect of fast fading without recoloring.

[0025] The charging formula is: Q = ∫V(t)dt, Q is the amount of electricity in the photochromic lens, V(t) is the real-time voltage at time t, and the voltage corresponding to each time point is integrated to obtain the amount of electricity in the photochromic lens. Using the above formula, the amount of electricity in the photochromic lens is calculated to control the coloring and fading effects of the photochromic lens.

[0026] The present application proposes a simple driving circuit and control method for color-changing lens sunglasses, which can not only meet the coloring control of the color-changing lenses, but also meet the requirements of small size.

[0027] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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.

[0028] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A driving circuit for color-changing lens sunglasses, characterized in that: include: The equivalent circuit of the color-changing lens, MOS tube Q1, MOS tube Q2, MOS tube Q3 and MOS tube Q4; The first end of the MOS tube Q1 receives the first square wave signal, the second end of the MOS tube Q1 is respectively connected to the power supply and the second end of the MOS tube Q3, and the third end of the MOS tube Q1 is respectively connected to one end of the color-changing lens equivalent circuit and the third end of the MOS tube Q2; the first end of the MOS tube Q2 is opened, and the second end of the MOS tube Q2 is respectively connected to the second end of the MOS tube Q4 and the ground; the first end of the MOS tube Q4 receives the fourth square wave signal, and the third end of the MOS tube Q4 is respectively connected to the other end of the color-changing lens equivalent circuit and the third end of the MOS tube Q3; the first end of the MOS tube Q3 receives the third square wave signal; The first square wave signal, the second square wave signal, the third square wave signal and the fourth square wave signal are all generated by a microcontroller.

2. The driving circuit of the color-changing lens sunglasses according to claim 1, characterized in that: The variable color lens equivalent circuit includes a capacitor C1 and a load Load; One end of the capacitor C1 and one end of the load Load are both connected to the third end of the MOS transistor Q1 , and the other end of the capacitor C1 and the other end of the load Load are both connected to the third end of the MOS transistor Q4 .

3. The driving circuit of the color-changing lens sunglasses according to claim 1, characterized in that: The MOS transistor Q1 , the MOS transistor Q2 , the MOS transistor Q3 and the MOS transistor Q4 form an H-bridge circuit.

4. The driving circuit of the color-changing lens sunglasses according to claim 1, characterized in that: The two ends of the equivalent circuit of the color-changing lens do not distinguish between positive and negative poles.

5. A control method for sunglasses with variable color lenses, characterized in that: The control method is applied to the driving circuit of the color-changing lens sunglasses according to any one of claims 1 to 4, and the control method includes: color-changing lens tinting control and color-changing lens fading control; The process of controlling the tinting of the color-changing lens is as follows: the first end of the MOS tube Q1 receives the first square wave signal, the MOS tube Q4 is turned on, the MOS tube Q2 and the MOS tube Q3 are turned off, a voltage drop is generated at both ends of the load Load, and the color-changing lens is tinted; The process of controlling the fading of the color-changing lens is as follows: MOS tube Q1 and MOS tube Q4 are turned off, the first end of MOS tube Q2 is turned on, the first end of MOS tube Q3 receives a third wave signal, MOS tube Q2 and MOS tube Q3 are turned on, and a voltage reverse to the original voltage is generated at both ends of the load Load, and the color-changing lens fades.

6. The control method of the color-changing lens sunglasses according to claim 5, characterized in that: The speed at which the color-variable lens is tinted depends on the duty cycle of the first square wave signal.

7. The control method of the color-changing lens sunglasses according to claim 5, characterized in that: The fading speed of the variable color lens depends on the duty cycle of the third wave signal.

8. The control method of the color-changing lens sunglasses according to claim 5, characterized in that: The speed at which the color-changing lens is tinted is related to the charging speed of the capacitor C1.

9. The control method of the color-changing lens sunglasses according to claim 5, characterized in that: The charging formula for the lens is: Q=∫V(t)dt Among them, Q is the charge in the color-changing lens, and V(t) is the real-time voltage at time t.

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