Dimming device and control method thereof

Abstract

The invention relates to the technical field of display, and discloses a dimming device and a control method of the dimming device.The dimming device comprises a plurality of transparent dimming structures, first power supply ends and second power supply ends, the number of the first power supply ends is the same as that of the transparent dimming structures, and the number of the second power supply ends is the same as that of the transparent dimming structures. One end of each transparent dimming structure is connected with the first power supply end in a one-to-one correspondence manner, the other end of each transparent dimming structure is connected with the second power supply end, and the first power supply end is configured to provide first alternating current driving voltage for the transparent dimming structures; and the second power supply end is configured to provide a second alternating current driving voltage for the transparent dimming structure so as to adjust the light transmittance of the transparent dimming structure, so that normal display of the dimming device is guaranteed under the condition that negative voltage is not introduced, and the number of cables connected with the dimming device is effectively reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology and provides a dimming device and a control method for the dimming device. Background Art

[0002] At present, liquid crystal glass (also called stained glass) is increasingly used in windows. That is, the windows are composed of multiple stained glasses with dyes added, and the deflection of liquid crystal molecules in the stained glass is controlled by a driving signal to achieve a change in the transmittance of the stained glass.

[0003] The driving signal for controlling the stained glass is usually generated by a control box and reaches the window via a long cable connected to the control box. When there are N pieces of stained glass in the window, the number of long cables required is 2N, which means that the number of cables is large and the wiring is complicated. Summary of the invention

[0004] The embodiments of the present disclosure provide a dimming device and a control method for the dimming device, so as to reduce the number of cables connected to the dimming device while ensuring normal display of the dimming device.

[0005] The specific technical solutions provided by this disclosure are as follows:

[0006] In a first aspect, an embodiment of the present disclosure provides a dimming device, comprising: a plurality of transparent dimming structures, a first power supply terminal and a second power supply terminal, wherein the number of the first power supply terminals is the same as the number of the transparent dimming structures;

[0007] One end of each transparent dimming structure is connected to the first power supply end in a one-to-one correspondence;

[0008] The other end of each transparent dimming structure is connected to the second power supply end;

[0009] A first power supply terminal is configured to provide a first AC driving voltage for the transparent dimming structure;

[0010] The second power supply terminal is configured to provide a second AC driving voltage to the transparent dimming structure to adjust the light transmittance of the transparent dimming structure.

[0011] Optionally, the voltage value of the first AC driving voltage is Bsint+A / 2, the value range of B is (-A / 2, A / 2), and A is the maximum driving voltage of the transparent dimming structure;

[0012] The voltage value of the second AC driving voltage is A / 2(sint+1).

[0013] Optionally, the transparent dimming structure is a dye liquid crystal dimming structure.

[0014] Optionally, it includes: a first sine wave generator;

[0015] The first sine wave generator is coupled to the first power supply terminal and is configured to provide a first AC driving voltage to the first power supply terminal.

[0016] Optionally, the first sine wave generator includes: a first comparison module, a first generation module and a first filtering module;

[0017] A first comparison module is configured to generate a first pulse signal and a second pulse signal according to an input first sine wave signal and a first triangle wave signal;

[0018] A first generating module is configured to generate a first preselected driving signal according to the first pulse signal, the second pulse signal and a preset first power supply terminal signal;

[0019] The first filtering module is configured to filter out high-frequency components in the first preselected driving signal to obtain a first AC driving voltage.

[0020] Optionally, the first comparison module includes: a first comparator and a second comparator;

[0021] The positive phase input terminal of the first comparator is used to receive a triangle wave signal, the negative phase input terminal is used to receive a sine wave signal, and the output terminal is connected to the first generating module to output a first pulse signal;

[0022] The positive phase input terminal of the second comparator is used to receive a sine wave signal, the negative phase input terminal is used to receive a triangle wave signal, and the output terminal is connected to the second generating module to output a second pulse signal.

[0023] Optionally, the first generating module includes: a first power supply terminal, a first transistor and a second transistor;

[0024] The control terminal of the first transistor is coupled to the first comparison module, the first terminal of the first transistor is coupled to the first power terminal, and the second terminal of the first transistor is coupled to the first terminal of the second transistor;

[0025] The control terminal of the second transistor is coupled to the second comparison module, the first terminal of the second transistor is coupled to the intermediate output terminal, and the second terminal of the second transistor is grounded;

[0026] A first transistor, configured to be turned on and off under the control of a first pulse signal;

[0027] a second transistor configured to be turned on and off under the control of a second pulse signal;

[0028] The first power supply terminal is configured to generate a first preselected driving signal under the control of the first transistor and the second transistor.

[0029] Optionally, the first filtering module includes: a first resistor, a first filtering inductor and a first filtering capacitor;

[0030] One end of the first resistor is coupled to the first generating module, and the other end of the first resistor is coupled to one end of the first filtering inductor;

[0031] The other end of the first filter inductor is coupled to one end of the first filter capacitor, and the other end of the first filter capacitor is grounded.

[0032] Optionally, it further comprises: a second sine wave generator;

[0033] The second sine wave generator is coupled to the second power supply terminal and is configured to provide a second AC driving voltage to the second power supply terminal.

[0034] Optionally, the second sine wave generator includes: a waveform synthesis module and a second filtering module;

[0035] A waveform synthesis module, configured to simulate a second preselected driving signal according to the input second sine wave signal and the second triangle wave signal;

[0036] The second filtering module is configured to filter out the high-frequency component in the second pre-selected driving signal to obtain a second AC driving voltage.

[0037] In a second aspect, the present disclosure also provides a control method for a dimming device, including:

[0038] The first power supply terminal provides a first AC driving voltage for the transparent dimming structure;

[0039] The second power supply terminal provides a second AC driving voltage for the transparent dimming structure to adjust the light transmittance of the transparent dimming structure.

[0040] The beneficial effects of the present disclosure are as follows:

[0041] In summary, a dimming device and a control method for the dimming device are provided in an embodiment of the present disclosure, wherein the dimming device includes: a plurality of transparent dimming structures, a first power supply terminal and a second power supply terminal, wherein the number of the first power supply terminals is the same as the number of the transparent dimming structures, one end of each transparent dimming structure is connected to the first power supply terminal in a one-to-one correspondence, and the other end of each transparent dimming structure is connected to the second power supply terminal, the first power supply terminal is configured to provide a first AC driving voltage for the transparent dimming structure, and the second power supply terminal is configured to provide a second AC driving voltage for the transparent dimming structure to adjust the transmittance of the transparent dimming structure, thereby ensuring the normal display of the dimming device without introducing a negative voltage, and effectively reducing the number of cables connected to the dimming device.

[0042] Other features and advantages of the present disclosure will be described in the following description, and partly become apparent from the description, or be understood by practicing the present disclosure. The purpose and other advantages of the present disclosure can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0044] Figure 1 It is a first connection diagram of a dimming device in the related art;

[0045] Figure 2 It is a second connection diagram of the dimming device in the related art;

[0046] Figure 3 It is a third connection diagram of the dimming device in the related art;

[0047] Figure 4 This is a connection diagram of a dimming device in an embodiment of the present disclosure;

[0048] Figure 5 is a schematic diagram of the first type of liquid crystal molecule deflection in an embodiment of the present disclosure;

[0049] Figure 6 is a schematic diagram of an equivalent AC sine wave in an embodiment of the present disclosure;

[0050] Figure 7 is a connection diagram of a first sine wave generator in an embodiment of the present disclosure;

[0051] Figure 8 is a circuit diagram of a first comparison module in an embodiment of the present disclosure;

[0052] Fig. 9 is a circuit diagram of a first generating module in an embodiment of the present disclosure;

[0053] Fig.10 is a circuit diagram of a first filtering module in an embodiment of the present disclosure;

[0054] Fig.11 is a connection diagram of a second sine wave generator in an embodiment of the present disclosure;

[0055] Fig.12 is a flow chart of a control method of a dimming device in an embodiment of the present disclosure;

[0056] Fig.13Schematic diagram of equivalent connection of a dimming device in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the technical solution of the present disclosure, rather than all the embodiments. Based on the embodiments recorded in the present disclosure document, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the technical solution of the present disclosure.

[0058] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented using sequences other than those illustrated or described herein.

[0059] In the related art, in order to adjust the transmittance of stained glass, two long cables are connected at both ends of the stained glass. The two long cables are used to transmit driving signals. Specifically, the long cable at one end is used to transmit the V+ signal, and the long cable at the other end is used to transmit the V- signal. It should be noted that the V+ signal and the V- signal here are both AC signals.

[0060] See also Figure 1 As shown, Figure 1 The circuit shown is explained in detail. Figure 1 There are 9 stained glass in total, namely stained glass 1, stained glass 2, stained glass 3 ... stained glass 9. Both ends of the above 9 stained glass are connected to long cables respectively. In the process of driving the stained glass to adjust the transmittance, a total of 18 long cables are required.

[0061] In order to save the number of long cables, in the related art, one end of each stained glass is also grounded as a common end, see Figure 2 As shown in the figure, 9 stained glasses require a total of 10 long cables, and N stained glasses require N+1 long cables, which reduces the number of long cables by nearly half. Figure 2 The connection method shown will also bring new problems. Since the sinusoidal signal is an AC signal, V1-9 are AC signals. The generation of AC signals requires the provision of negative voltage. Obviously, the common terminal as the ground cannot provide a negative voltage.

[0062] To solve the negative voltage problem, the common terminal can be connected to a DC power supply instead of grounding. Figure 3As shown, one end of the stained glass, namely the V- signal, takes a voltage U=Asint(A≤15)+B, and the other end of the stained glass, namely the V+ signal, takes a voltage Udc=B, then U-Udc=Asint, but under this connection relationship, if U>0 is required, then Umin=-A+B>0=>B>A, Umax>2A, which will correspondingly cause the system power supply to be twice the voltage when driven alone, that is, the system power supply voltage is increased, which increases the design difficulty.

[0063] Based on this, an embodiment of the present application proposes a dimming device.

[0064] The preferred embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0065] See also Figure 4 As shown, a dimming device proposed in an embodiment of the present application includes: multiple transparent dimming structures, a first power supply terminal and a second power supply terminal, wherein the number of the first power supply terminals is the same as the number of the transparent dimming structures.

[0066] It should be noted that the above transparent dimming structure is a dye liquid crystal dimming structure, that is, after dye is added to the liquid crystal molecules, the deflection of the liquid crystal molecules is controlled to achieve a change in the transmittance of the dimming structure, thereby achieving the purpose of color change.

[0067] The following describes the deflection of liquid crystal molecules under the driving signal, see Figure 5 As shown, when voltage is applied to the lower plate, that is, Light is in the ON state, and voltage is also applied to the upper plate on the left half, that is, Light is also in the ON state, the deflection angle between the liquid crystal molecules and the plates is 90 degrees, that is, in this state, the liquid crystal molecules are perpendicular to the upper and lower plates, thereby driving the dye molecules perpendicular to the upper and lower plates, and the light transmittance is the highest; when voltage is applied to the lower plate, that is, Light is in the ON state, and no voltage is applied to the upper plate on the right half, that is, Light is in the OFF state, the deflection angle between the liquid crystal molecules and the plates is 0 degrees, that is, in this state, the liquid crystal molecules are parallel to the upper and lower plates, thereby driving the dye molecules to be parallel to the upper and lower plates, thereby absorbing light, and the light transmittance is the lowest.

[0068] In order to facilitate the adjustment of the light transmittance of each transparent dimming structure, one end of each transparent dimming structure is connected to the first power supply end in a one-to-one correspondence.

[0069] It should be noted that one end of each transparent dimming structure is connected to the first power supply end in a one-to-one correspondence, that is, different first power supply ends input driving signals to the connected transparent dimming structures, the number of first power supply ends is the same as the number of transparent dimming structures, and each transparent dimming structure is independently controlled.

[0070] The other end of each transparent dimming structure is connected to the second power supply end.

[0071] In an embodiment of the present application, in order to reduce the number of cables, one end of each transparent dimming structure is connected to a common end, that is, the other end of each transparent dimming structure is connected to the same second power supply end, and each transparent dimming structure is uniformly controlled by the second power supply end.

[0072] In a specific driving process, the first power supply terminal is configured to provide a first AC driving voltage for the transparent dimming structure.

[0073] During implementation, in order to enable the deflection angle of the liquid crystal molecules to be fully adjustable, the first power supply terminal provides the transparent dimming structure with a first AC driving voltage.

[0074] In the embodiment of the present application, the voltage value of the first AC driving voltage is Bsint+A / 2, the value range of B is (-A / 2, A / 2), and A is the maximum driving voltage of the transparent dimming structure.

[0075] For example, when the maximum driving voltage of the transparent dimming structure is 18V, that is, the driving signal of the transparent dimming structure is a sine signal of 0 to 18V, the voltage value of the first AC driving voltage is Bsint+9, where the value range of B is (-9, 9).

[0076] The second power supply terminal is configured to provide a second AC driving voltage to the transparent dimming structure to adjust the light transmittance of the transparent dimming structure.

[0077] In the embodiment of the present application, in order not to introduce negative voltage and not to increase the power supply voltage of the system, while being able to reduce the number of cables connecting the transparent dimming structure to N+1, the second power supply end provides a second AC driving voltage for each transparent dimming structure, and the voltage value of the second AC driving voltage is A / 2(sint+1).

[0078] For example, when the maximum driving voltage of the transparent dimming structure is 18V, that is, the driving signal of the transparent dimming structure is a sinusoidal signal of 0-18V, the voltage value of the second AC driving voltage is 9 (sint+1).

[0079] When the first AC driving voltage and the second AC driving voltage act together on the transparent dimming structure, it is equivalent to an AC sine wave. Figure 6 shown.

[0080] The generation of the first AC driving voltage and the second AC driving voltage in the embodiment of the present application is further described below. It should be noted that the dimming device includes: a first sine wave generator.

[0081] During implementation, the first sine wave generator is used to generate the first AC driving voltage, that is, the first sine wave generator is coupled to the first power supply terminal and is configured to provide the first AC driving voltage to the first power supply terminal.

[0082] For details, see Figure 7 As shown, the first sine wave generator 10 comprises: a first comparison module 101 , a first generation module 102 and a first filtering module 103 .

[0083] During implementation, the first comparison module is configured to generate a first pulse signal and a second pulse signal according to the input first sine wave signal and the first triangle wave signal.

[0084] See also Figure 8 As shown, the first triangle wave signal input to the first comparison module is 3.3V / 10KHZ / TRIVP9, and the first sine wave signal input to the first comparison module is 3.3V / 50HZ / Sina.

[0085] The first comparison module includes: a first comparator and a second comparator.

[0086] See also Figure 8 As shown, the first comparator included in the first comparison module is FVP1, and the second comparator included in the first comparison module is FVP2.

[0087] The positive phase input terminal of the first comparator is used to receive a triangle wave signal, the negative phase input terminal is used to receive a sine wave signal, and the output terminal is connected to the first generating module to output a first pulse signal.

[0088] During implementation, the positive phase input terminal IN1 of the first comparator FVP1 is used to receive a triangle wave signal, the negative phase input terminal IN2 is used to receive a sine wave signal, and the output terminal OUT1 is connected to the first generating module to output the first pulse signal CTRL1.

[0089] The positive phase input terminal of the second comparator is used to receive a sine wave signal, the negative phase input terminal is used to receive a triangle wave signal, and the output terminal is connected to the second generating module to output a second pulse signal.

[0090] During implementation, the positive phase input terminal IN1 of the second comparator FVP2 is used to receive a sine wave signal, the negative phase input terminal IN2 is used to receive a triangle wave signal, and the output terminal OUT1 is connected to the second generation module to output the second pulse signal CTRL2.

[0091] The first generating module is configured to generate a first preselected driving signal according to the first pulse signal, the second pulse signal and a preset first power supply terminal signal.

[0092] See also Fig. 9 As shown, the first generating module includes: a first power supply terminal VCC-18V0, a ​​first transistor MNP6 and a second transistor MNP8.

[0093] It should be noted that the voltage value of the first power supply terminal is the maximum driving voltage of the transparent dimming structure. Fig. 9 The first power supply terminal in the embodiment is adapted to a transparent dimming structure with a maximum driving voltage of 18V. If the maximum driving voltage of the transparent dimming structure is 36V, the voltage value of the first power supply terminal is VCC-36V0.

[0094] The first transistor is Fig. 9 The connection relationship is: the control end of the first transistor is coupled to the first comparison module, the first end of the first transistor is coupled to the first power supply end, and the second end of the first transistor is coupled to the first end of the second transistor.

[0095] The second transistor Fig. 9 The connection relationship in is: the control end of the second transistor is coupled to the second comparison module, the first end of the second transistor is coupled to the intermediate output end, and the second end of the second transistor is grounded.

[0096] During the implementation, the first transistor is configured to be turned on and off under the control of the first pulse signal, that is, when the first pulse signal is at a high potential, the first transistor is turned on; when the first pulse signal is at a low potential, the first transistor is turned off.

[0097] During the implementation, the second transistor is configured to be turned on and off under the control of the second pulse signal, that is, when the second pulse signal is at a high potential, the second transistor is turned on; when the second pulse signal is at a low potential, the second transistor is turned off.

[0098] The first power supply terminal is configured to generate a first preselected driving signal under the control of the first transistor and the second transistor.

[0099] During implementation, the first preselected driving signal OUT3 is generated by combining the voltage value of the first power supply terminal, the first transistor and the second transistor.

[0100] In addition, the first sine wave generator also includes a first filtering module, see Fig.10 As shown, after obtaining the first preselected driving signal OUT3, it needs to be further filtered.

[0101] During implementation, the first filtering module is configured to filter out high-frequency components in the first preselected driving signal to obtain a first AC driving voltage.

[0102] The first filtering module specifically includes: a first resistor AJP48, a first filtering inductor AJP49 and a first filtering capacitor AJP50.

[0103] See also Fig.10 As shown, one end of the first resistor AJP48 is coupled to the first generating module, and the other end of the first resistor AJP48 is coupled to one end of the first filtering inductor AJP49.

[0104] During implementation, after the first filter module receives the first pre-selected driving signal OUT3, the first resistor AJP48 is used to limit the current generated by the first pre-selected driving signal OUT3.

[0105] The other end of the first filter inductor AJP49 is coupled to one end of the first filter capacitor AJP50 , and the other end of the first filter capacitor AJP50 is grounded.

[0106] During implementation, the first filter inductor AJP49 and the first filter capacitor AJP50 are used to filter out high-frequency components in the current generated by the first preselected drive signal OUT3, so as to make the obtained first AC drive voltage more stable.

[0107] In addition, it should be noted that the dimming device further includes: a second sine wave generator.

[0108] The second sine wave generator is coupled to the second power supply terminal and is configured to provide a second AC driving voltage to the second power supply terminal.

[0109] During implementation, the second sine wave generator is used to generate the second AC driving voltage, that is, the second sine wave generator is coupled to the second power supply terminal and is configured to provide the second AC driving voltage to the second power supply terminal.

[0110] See also Fig.11 As shown, the second sine wave generator 20 includes: a waveform synthesis module 201 and a second filtering module 202 .

[0111] The waveform synthesis module 201 is configured to simulate a second pre-selected driving signal according to the input second sine wave signal and the second triangle wave signal.

[0112] During implementation, the second sine wave signal input to the waveform synthesis module 201 may be the same as the first sine wave signal, and the second triangle wave signal input to the waveform synthesis module 201 may be the same as the second sine wave signal. The waveform synthesis module 201 simulates the second pre-selected driving signal according to the second sine wave signal and the second triangle wave signal.

[0113] The second filtering module 202 is configured to filter out high-frequency components in the second pre-selected driving signal to obtain a second AC driving voltage.

[0114] Similarly, after the second pre-selected driving signal is obtained, the high frequency component in the second pre-selected driving signal is filtered out by the second filtering module 202 to obtain a second AC driving voltage.

[0115] Based on the same inventive concept, a driving method of a dimming device is provided in an embodiment of the present disclosure. Fig.12 As shown, including:

[0116] Step 201: A first power supply terminal provides a first AC driving voltage to the transparent dimming structure.

[0117] During implementation, after obtaining the first AC driving voltage, the first AC driving voltage is provided to the connected transparent dimming structures through different first power supply terminals, so that one end of each transparent dimming structure can obtain a driving signal with a voltage value of Bsint+A / 2.

[0118] Step 202: The second power supply terminal provides a second AC driving voltage to the transparent dimming structure to adjust the transmittance of the transparent dimming structure.

[0119] During the implementation process, after obtaining the second AC driving voltage, the second AC driving voltage is provided to the connected transparent dimming structures through different second power supply terminals, so that the other end of each transparent dimming structure can obtain a driving signal with a voltage value of A / 2(sint+1).

[0120] Still Figure 2 For illustration, assuming that the maximum driving voltage of each transparent dimming structure is 18V, each transparent dimming structure is equivalent to a 20uF / 50V capacitor. In this way, one end of each capacitor is connected to the driving voltage of Bsint+9, and the other end of each capacitor is connected to the driving voltage of 9sint+9. At a certain moment, the specific voltage value of each transparent dimming structure can be found in Fig.13 As shown by Fig.13 It can be seen that the normal display of each transparent dimming structure in the dimming device is guaranteed without introducing a negative voltage, and the number of cables connected to the dimming device is effectively reduced.

[0121] In summary, in an embodiment of the present disclosure, a dimming device and a control method for the dimming device are provided, wherein the dimming device includes: a plurality of transparent dimming structures, a first power supply terminal and a second power supply terminal, wherein the number of the first power supply terminals is the same as the number of the transparent dimming structures, one end of each transparent dimming structure is connected to the first power supply terminal in a one-to-one correspondence, and the other end of each transparent dimming structure is connected to the second power supply terminal, the first power supply terminal is configured to provide a first AC driving voltage for the transparent dimming structure, and the second power supply terminal is configured to provide a second AC driving voltage for the transparent dimming structure to adjust the transmittance of the transparent dimming structure, thereby ensuring the normal display of the dimming device without introducing a negative voltage, and effectively reducing the number of cables connected to the dimming device.

[0122] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program product systems. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product system implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0123] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program product systems according to the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0124] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0125] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0126] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims

1. A dimming device, characterized in that: include: A plurality of transparent dimming structures, a first power supply terminal and a second power supply terminal, wherein the number of the first power supply terminals is the same as the number of the transparent dimming structures; One end of each of the transparent dimming structures is connected to the first power supply end in a one-to-one correspondence; The other end of each of the transparent dimming structures is connected to the second power supply end; The first power supply terminal is configured to provide a first AC driving voltage for the transparent dimming structure; The second power supply terminal is configured to provide a second AC driving voltage to the transparent dimming structure to adjust the transmittance of the transparent dimming structure.

2. The dimming device according to claim 1, characterized in that: The voltage value of the first AC driving voltage is Bsint+A / 2, the value range of B is (-A / 2, A / 2), and A is the maximum driving voltage of the transparent dimming structure; The voltage value of the second AC driving voltage is A / 2(sint+1).

3. The dimming device according to claim 1, characterized in that: The transparent dimming structure is a dye liquid crystal dimming structure.

4. The dimming device according to claim 1, characterized in that: include: A first sine wave generator; The first sine wave generator is coupled to the first power supply terminal and is configured to provide the first AC driving voltage to the first power supply terminal.

5. The dimming device according to claim 4, characterized in that: The first sine wave generator includes: a first comparison module, a first generation module and a first filtering module; The first comparison module is configured to generate a first pulse signal and a second pulse signal according to the input first sine wave signal and the first triangle wave signal; The first generating module is configured to generate a first preselected driving signal according to the first pulse signal, the second pulse signal and a preset first power supply terminal signal; The first filtering module is configured to filter out high-frequency components in the first pre-selected driving signal to obtain the first AC driving voltage.

6. The dimming device according to claim 5, characterized in that: The first comparison module includes: a first comparator and a second comparator; The positive phase input terminal of the first comparator is used to receive a triangle wave signal, the negative phase input terminal is used to receive a sine wave signal, and the output terminal is connected to the first generating module to output the first pulse signal; The positive phase input terminal of the second comparator is used to receive a sine wave signal, the negative phase input terminal is used to receive a triangle wave signal, and the output terminal is connected to the second generating module to output the second pulse signal.

7. The dimming device according to claim 5, characterized in that: The first generating module comprises: a first power supply terminal, a first transistor and a second transistor; The control terminal of the first transistor is coupled to the first comparison module, the first terminal of the first transistor is coupled to the first power terminal, and the second terminal of the first transistor is coupled to the first terminal of the second transistor; The control terminal of the second transistor is coupled to the second comparison module, the first terminal of the second transistor is coupled to the intermediate output terminal, and the second terminal of the second transistor is grounded; The first transistor is configured to be turned on and off under the control of the first pulse signal; The second transistor is configured to be turned on and off under the control of the second pulse signal; The first power supply terminal is configured to generate the first preselected driving signal under the control of the first transistor and the second transistor.

8. The dimming device according to claim 5, characterized in that: The first filtering module includes: a first resistor, a first filtering inductor and a first filtering capacitor; One end of the first resistor is coupled to the first generating module, and the other end of the first resistor is coupled to one end of the first filtering inductor; The other end of the first filter inductor is coupled to one end of the first filter capacitor, and the other end of the first filter capacitor is grounded.

9. The dimming device according to claim 1, characterized in that: Also includes: A second sine wave generator; The second sine wave generator is coupled to the second power supply terminal and is configured to provide the second AC driving voltage to the second power supply terminal.

10. The dimming device according to claim 9, characterized in that: The second sine wave generator comprises: a waveform synthesis module and a second filtering module; The waveform synthesis module is configured to simulate a second preselected driving signal according to the input second sine wave signal and the second triangle wave signal; The second filtering module is configured to filter out high-frequency components in the second pre-selected driving signal to obtain the second AC driving voltage.

11. A control method for a dimming device, characterized in that: include: The first power supply terminal provides a first AC driving voltage for the transparent dimming structure; The second power supply terminal provides a second AC driving voltage for the transparent dimming structure to adjust the light transmittance of the transparent dimming structure.

Images