Voltage driving circuit and electrical equipment

Abstract

The present application discloses a voltage driving circuit and an electrical device. The voltage driving circuit drives the first skylight glass. The voltage driving circuit includes a controller, a first switch branch, a second switch branch, a third switch branch and a fourth switch branch. The controller outputs a first pulse width modulation signal, a second pulse width modulation signal, a third pulse width modulation signal and a fourth pulse width modulation signal. The first switch branch is turned on or off in response to the first pulse width modulation signal, and the second switch branch is turned on or off in response to the second pulse width modulation signal to convert a DC power supply into a first power supply, the DC power supply is a sine wave, and the first power supply is a T-type wave. The third switch branch is turned on or off in response to the third pulse width modulation signal, and the fourth switch branch is turned on or off in response to the fourth pulse width modulation signal to convert the DC power supply into a second power supply, and the second power supply is a T-type wave. In the above manner, the color change of the skylight glass can be made smoother and more fluent.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electronic circuits, and in particular to a voltage driving circuit and an electrical device. Background Art

[0002] PDLC (polymer dispersed liquid crystal) skylight glass is a kind of smart glass with dimmable function. PDLC skylight glass adopts PDLC technology, which can control the transparency of glass through external voltage and realize the adaptability of glass to different environments.

[0003] At present, when controlling PDLC skylight glass, a power supply that directly outputs a sine wave is usually used to drive the PDLC skylight glass. However, this driving method causes the color change of the skylight glass to have an obvious jump or jitter feeling. Utility Model Content

[0004] The embodiments of the present application provide a voltage driving circuit and an electrical device, which can make the color change of the skylight glass smoother and more fluent.

[0005] In a first aspect, an embodiment of the present application provides a voltage driving circuit for driving a first screen glass, wherein the voltage driving circuit includes a controller, a first switch branch, a second switch branch, a third switch branch, and a fourth switch branch;

[0006] The controller is respectively connected to the first end of the first switch branch, the first end of the second switch branch, the first end of the third switch branch and the first end of the fourth switch branch, the third end of the first switch branch and the third end of the third switch branch are both connected to a DC power supply, the second end of the first switch branch is respectively connected to the third end of the second switch branch and the first end of the first skylight glass, and the second end of the third switch branch is respectively connected to the third end of the fourth switch branch and the second end of the first skylight glass;

[0007] The controller is used to output a first pulse width modulation signal, a second pulse width modulation signal, a third pulse width modulation signal and a fourth pulse width modulation signal;

[0008] The first switch branch is turned on or off in response to the first pulse width modulation signal, and the second switch branch is turned on or off in response to the second pulse width modulation signal, so as to convert the DC power supply into a first power supply and input it to the first end of the first skylight glass, wherein the waveform of the DC power supply is a sine wave, and the waveform of the first power supply is a T-type wave;

[0009] The third switch branch is turned on or off in response to the third pulse width modulation signal, and the fourth switch branch is turned on or off in response to the fourth pulse width modulation signal to convert the DC power supply into a second power supply and input it to the second end of the first skylight glass, wherein the waveform of the second power supply is a T-type wave.

[0010] In one or more embodiments, the voltage driving circuit is also used to drive the second curtain glass, and the voltage driving circuit further includes a fifth switch branch and a sixth switch branch;

[0011] The controller is connected to the first end of the fifth switch branch and the first end of the sixth switch branch respectively, the third end of the fifth switch branch is connected to the DC power supply, the second end of the fifth switch branch is connected to the third end of the sixth switch branch and the second end of the second curtain glass respectively, and the first end of the second curtain glass is connected to the first end of the first curtain glass;

[0012] The controller is also used to output a fifth pulse width modulation signal and a sixth pulse width modulation signal;

[0013] The fifth switch branch is turned on or off in response to the fifth pulse width modulation signal, and the sixth switch branch is turned on or off in response to the sixth pulse width modulation signal, so as to convert the DC power supply into a third power supply and input it to the second end of the second curtain glass, wherein the waveform of the third power supply is a T-type wave.

[0014] In one or more embodiments, the voltage driving circuit further includes:

[0015] a first driving branch, connected between the controller and the first end of the first switch branch, and connected between the controller and the first end of the second switch branch, for outputting a first sub-pulse width modulation signal to the first switch branch based on the first pulse width modulation signal, and outputting a second sub-pulse width modulation signal to the second switch branch based on the second pulse width modulation signal, wherein the level of the first sub-pulse width modulation signal is the same as that of the first pulse width modulation signal, and the driving capability of the first sub-pulse width modulation signal is stronger than that of the first pulse width modulation signal, and the level of the second sub-pulse width modulation signal is the same as that of the second pulse width modulation signal, and the driving capability of the second sub-pulse width modulation signal is stronger than that of the second pulse width modulation signal;

[0016] a second driving branch, connected between the controller and the first end of the third switch branch, and connected between the controller and the first end of the fourth switch branch, for outputting a third sub-pulse width modulation signal to the third switch branch based on the third pulse width modulation signal, and outputting a fourth sub-pulse width modulation signal to the fourth switch branch based on the fourth pulse width modulation signal, wherein the level of the third sub-pulse width modulation signal is the same as that of the third pulse width modulation signal, and the driving capability of the third sub-pulse width modulation signal is stronger than that of the third pulse width modulation signal, and the level of the fourth sub-pulse width modulation signal is the same as that of the fourth pulse width modulation signal, and the driving capability of the fourth sub-pulse width modulation signal is stronger than that of the fourth pulse width modulation signal;

[0017] The third driving branch is connected between the controller and the first end of the fifth switch branch, and is connected between the controller and the first end of the sixth switch branch, and is used to output a fifth sub-pulse width modulation signal to the fifth switch branch based on the fifth pulse width modulation signal, and output a sixth sub-pulse width modulation signal to the sixth switch branch based on the sixth pulse width modulation signal, wherein the level of the fifth sub-pulse width modulation signal is the same as that of the fifth pulse width modulation signal, and the driving ability of the fifth sub-pulse width modulation signal is stronger than that of the fifth pulse width modulation signal, and the level of the sixth sub-pulse width modulation signal is the same as that of the sixth pulse width modulation signal, and the driving ability of the sixth sub-pulse width modulation signal is stronger than that of the sixth pulse width modulation signal.

[0018] In one or more embodiments, the voltage driving circuit further includes:

[0019] A first signal processing branch, connected to a first connection point and a first end of the first skylight glass, for filtering the first power supply and implementing electrostatic protection, wherein the first connection point is a connection point between the second end of the first switch branch and the third end of the second switch branch;

[0020] a second signal processing branch, connected to a second connection point and the second end of the first skylight glass, for filtering the second power supply and implementing electrostatic protection, wherein the second connection point is a connection point between the second end of the third switch branch and the third end of the fourth switch branch;

[0021] The third signal processing branch is connected to the third connection point and the second end of the second curtain glass, and is used to filter the third power supply and implement electrostatic protection, wherein the third connection point is the connection point between the second end of the fifth switch branch and the third end of the sixth switch branch.

[0022] In one or more embodiments, the first switch branch includes a first switch tube, the second switch branch includes a second switch tube, the third switch branch includes a third switch tube, the fourth switch branch includes a fourth switch tube, the fifth switch branch includes a fifth switch tube, and the sixth switch branch includes a sixth switch tube;

[0023] The first end of the first switch tube and the first end of the second switch tube are both connected to the controller, the second end of the first switch tube is respectively connected to the third end of the second switch tube and the first end of the first skylight glass, the third end of the first switch tube is connected to the DC power supply, and the second end of the second switch tube is grounded;

[0024] The first end of the third switch tube and the first end of the fourth switch tube are both connected to the controller, the second end of the third switch tube is respectively connected to the third end of the fourth switch tube and the second end of the first skylight glass, the third end of the third switch tube is connected to the DC power supply, and the second end of the fourth switch tube is grounded;

[0025] The first end of the fifth switch tube and the first end of the sixth switch tube are both connected to the controller, the second end of the fifth switch tube is respectively connected to the third end of the sixth switch tube and the second end of the second curtain glass, the third end of the fifth switch tube is connected to the DC power supply, and the second end of the sixth switch tube is grounded.

[0026] In one or more embodiments, the first driving branch includes a first resistor, a second resistor, a first capacitor, a second capacitor and a first driving chip;

[0027] The first resistor and the first capacitor are connected in series between the controller and the ground, the connection point between the first resistor and the first capacitor is connected to the first input terminal of the first driver chip, and the first output terminal of the first driver chip is connected to the first terminal of the first switch branch;

[0028] The second resistor and the second capacitor are connected in series between the controller and the ground, the connection point between the second resistor and the second capacitor is connected to the second input end of the first driver chip, and the second output end of the first driver chip is connected to the first end of the second switch branch.

[0029] In one or more embodiments, the second driving branch includes a third resistor, a fourth resistor, a third capacitor, a fourth capacitor and a second driving chip;

[0030] The third resistor and the third capacitor are connected in series between the controller and the ground, the connection point between the third resistor and the third capacitor is connected to the first input terminal of the second driver chip, and the first output terminal of the second driver chip is connected to the first terminal of the third switch branch;

[0031] The fourth resistor and the fourth capacitor are connected in series between the controller and the ground, a connection point between the fourth resistor and the fourth capacitor is connected to the second input end of the second driver chip, and a second output end of the second driver chip is connected to the first end of the fourth switch branch.

[0032] In one or more embodiments, the third driving branch includes a fifth resistor, a sixth resistor, a fifth capacitor, a sixth capacitor and a third driving chip;

[0033] The fifth resistor and the fifth capacitor are connected in series between the controller and the ground, the connection point between the fifth resistor and the fifth capacitor is connected to the first input terminal of the third driver chip, and the first output terminal of the third driver chip is connected to the first terminal of the fifth switch branch;

[0034] The sixth resistor and the sixth capacitor are connected in series between the controller and the ground, the connection point between the sixth resistor and the sixth capacitor is connected to the second input end of the third driver chip, and the second output end of the third driver chip is connected to the first end of the sixth switch branch.

[0035] In one or more embodiments, the first signal processing branch includes a first inductor, a seventh capacitor, an eighth capacitor, and a first electrostatic protection diode, the second signal processing branch includes a second inductor, a ninth capacitor, a tenth capacitor, and a second electrostatic protection diode, and the third signal processing branch includes a third inductor, an eleventh capacitor, a twelfth capacitor, and a third electrostatic protection diode;

[0036] The first inductor and the seventh capacitor are connected in series between the first connection point and the ground, and the eighth capacitor is connected in parallel with the seventh capacitor and the first electrostatic protection diode;

[0037] The second inductor and the ninth capacitor are connected in series between the second connection point and the ground, and the tenth capacitor is connected in parallel with the ninth capacitor and the second electrostatic protection diode;

[0038] The third inductor and the eleventh capacitor are connected in series between a third connection point and the ground, and the twelfth capacitor is connected in parallel with the eleventh capacitor and the third electrostatic protection diode.

[0039] In a second aspect, an embodiment of the present application provides an electrical device, comprising at least one skylight glass and the voltage driving circuit as described above.

[0040] The beneficial effect of the present application is that the voltage driving circuit of the embodiment of the present application is used to drive the first curtain glass, and the voltage driving circuit includes a controller, a first switch branch, a second switch branch, a third switch branch and a fourth switch branch. The controller is used to output a first pulse width modulation signal, a second pulse width modulation signal, a third pulse width modulation signal and a fourth pulse width modulation signal. The first switch branch is turned on or off in response to the first pulse width modulation signal, and the second switch branch is turned on or off in response to the second pulse width modulation signal to convert the DC power supply into the first power supply and input it to the first end of the first curtain glass, wherein the waveform of the DC power supply is a sine wave and the waveform of the first power supply is a T-type wave. The third switch branch is turned on or off in response to the third pulse width modulation signal, and the fourth switch branch is turned on or off in response to the fourth pulse width modulation signal to convert the DC power supply into the second power supply and input it to the second end of the first curtain glass, wherein the waveform of the second power supply is a T-type wave. By adjusting the first pulse width modulation signal, the second pulse width modulation signal, the third pulse width modulation signal and the fourth pulse width modulation signal, the phase difference between the first power source and the second power source can be adjusted to adjust the voltage difference at both ends of the first curtain glass. Then, by gradually increasing the phase difference between the first power source and the second power source, the voltage difference at both ends of the first curtain glass can be adjusted to gradually increase, thereby making the color change of the first curtain glass smoother and more fluent. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] One or more embodiments are exemplarily described by the figures in the corresponding drawings, and these exemplary descriptions are not intended to limit the embodiments. Elements with the same reference numerals in the drawings represent similar elements.

[0042] Figure 1 The structure of the voltage driving circuit provided in the embodiment of the present application is shown in FIG. Figure 1 ;

[0043] Figure 2 is a schematic diagram of various voltages in the voltage driving circuit provided in an embodiment of the present application;

[0044] Figure 3 The structure of the voltage driving circuit provided in the embodiment of the present application is shown in FIG. Figure 2 ;

[0045] Figure 4 The structure of the voltage driving circuit provided in the embodiment of the present application is shown in FIG. Figure 3 ;

[0046] Figure 5 The structure of the voltage driving circuit provided in the embodiment of the present application is shown in FIG. Figure 4 ;

[0047] Figure 6 The structure of the voltage driving circuit provided in the embodiment of the present application is shown in FIG. Figure 5 ;

[0048] Figure 7 is with Figure 5 A circuit structure corresponding to the structure shown. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and in detail in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0050] It should be noted that, when an element is described as being “connected to” another element, it may be directly connected to the other element, or one or more intervening elements may exist therebetween.

[0051] In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as there is no structural conflict between them.

[0052] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of the voltage driving circuit provided in the embodiment of the present application. Figure 1 As shown, the voltage driving circuit 1000 is used to drive the first skylight glass 2000. The first skylight glass 2000 is a PDLC skylight glass.

[0053] The voltage driving circuit 1000 includes a controller 200 , a first switch branch 10 , a second switch branch 20 , a third switch branch 30 and a fourth switch branch 40 .

[0054] Among them, the controller 200 is respectively connected to the first end of the first switch branch 10, the first end of the second switch branch 20, the first end of the third switch branch 30 and the first end of the fourth switch branch 40, the third end of the first switch branch 10 and the third end of the third switch branch 30 are both connected to the DC power supply VC, the second end of the first switch branch 10 is respectively connected to the third end of the second switch branch 20 and the first end of the first curtain glass 2000, and the second end of the third switch branch 30 is respectively connected to the third end of the fourth switch branch 40 and the second end of the first curtain glass 2000.

[0055] Specifically, the controller 200 is used to output a first pulse width modulation signal, a second pulse width modulation signal, a third pulse width modulation signal, and a fourth pulse width modulation signal. The first switch branch 10 is turned on or off in response to the first pulse width modulation signal, and the second switch branch 20 is turned on or off in response to the second pulse width modulation signal, so as to convert the DC power supply VC into a first power supply and input it to the first end of the first curtain glass 2000, wherein the waveform of the DC power supply VC is a sine wave (the voltage of the DC power supply VC is greater than zero), and the waveform of the first power supply is a T-type wave. The third switch branch 30 is turned on or off in response to the third pulse width modulation signal, and the fourth switch branch 40 is turned on or off in response to the fourth pulse width modulation signal, so as to convert the DC power supply VC into a second power supply and input it to the second end of the first curtain glass 2000, wherein the waveform of the second power supply is a T-type wave.

[0056] Please refer to Figure 2 , Figure 2 An example is shown Figure 1 Schematic diagram of each voltage in the voltage driving circuit 1000 shown in FIG. Figure 2 As shown, Figure 2 The horizontal axes of A1, A2, and A3 are all time. Figure 2 In the A1 part of FIG. 1 , the curve S1 is the DC power supply VC, and the curve S2 is the first power supply or the second power supply. Taking the curve S2 as the first power supply as an example, at this time, Figure 2 The curve shown in the A2 part of FIG is also the first power supply. When the phase difference between the second power supply and the first power supply is 0, the curve of the second power supply is the same as the first power supply, that is, curve S2 (or Figure 2 The curve shown in part A2 of FIG. 1 is also the second power supply.

[0057] Figure 2The A3 part in is the difference between the first power supply and the second power supply or the difference between the second power supply and the first power supply. Specifically, at time t0, in actual application, it can correspond to the moment when the voltage driving circuit 1000 is just powered on, that is, it can correspond to the moment when the controller 200 just outputs the first pulse width modulation signal, the second pulse width modulation signal, the third pulse width modulation signal and the fourth pulse width modulation signal. At this time, the phase difference between the first power supply and the second power supply is 0, and the voltage difference across the first curtain glass 2000 is 0. Afterwards, the controller 200 adjusts the frequency and / or duty cycle of the first pulse width modulation signal, the second pulse width modulation signal, the third pulse width modulation signal and the fourth pulse width modulation signal output by it, so that the phase difference between the first power supply and the second power supply gradually increases, and the voltage difference across the first curtain glass 2000 also gradually increases. For example, the first pulse width modulation signal and the second pulse width modulation signal are maintained, and the phase of the second power supply is adjusted by adjusting the frequency and / or duty cycle of the third pulse width modulation signal and the fourth pulse width modulation signal, thereby adjusting the phase difference between the first power supply and the second power supply to gradually increase. Until the phase difference between the first power source and the second power source increases to π, the voltage difference across the first screen glass 2000 reaches a peak value.

[0058] In summary, by gradually increasing the voltage difference across the first screen glass 2000, the color change of the first screen glass 2000 can be prevented from having an obvious jump or shake feeling. In other words, the color change of the first screen glass 2000 is smoother and more fluent.

[0059] Secondly, due to the use of T-wave, the peak value is smaller than that of the sine wave in the related art, which reduces the hardware requirements and is conducive to the use of lower-cost hardware. Moreover, under the same conditions, the lower the voltage, the lower the radiation, so compared with the sine wave in the related art, the use of T-wave can also reduce radiation and better protect the health of users.

[0060] It can be understood that, in the embodiments of the present application, each pulse width modulation signal (such as the first pulse width modulation signal) is a pulse width modulation (PWM) signal, which is a commonly used modulation technology that achieves signal modulation by changing the width of a pulse.

[0061] In one embodiment, if Figure 3 As shown, the voltage driving circuit 1000 is also used to drive the second curtain glass 3000 , and the voltage driving circuit 1000 further includes a fifth switch branch 50 and a sixth switch branch 60 .

[0062] The controller 200 is connected to the first end of the fifth switch branch 50 and the first end of the sixth switch branch 60 respectively, the third end of the fifth switch branch 50 is connected to the DC power supply VC, the second end of the fifth switch branch 50 is connected to the third end of the sixth switch branch 60 and the second end of the second curtain glass 3000 respectively, and the first end of the second curtain glass 3000 is connected to the first end of the first curtain glass 2000.

[0063] Specifically, the controller 200 is also used to output a fifth pulse width modulation signal and a sixth pulse width modulation signal. The fifth switch branch 50 is turned on or off in response to the fifth pulse width modulation signal, and the sixth switch branch 60 is turned on or off in response to the sixth pulse width modulation signal, so as to convert the DC power supply VC into a third power supply and input it to the second end of the second curtain glass 3000, wherein the waveform of the third power supply is a T-type wave.

[0064] In this embodiment, the voltage difference across the second curtain glass 3000 is the difference between the first power supply and the third power supply. The first end of the first curtain glass 2000 and the first end of the second curtain glass 2000 are common ends, and the first power supply should be kept unchanged. When the first curtain glass 2000 needs to be driven, the phase of the second power supply is adjusted by adjusting the third pulse width modulation signal and the fourth pulse width modulation signal, so that the phase difference between the first power supply and the second power supply is gradually increased. When the second curtain glass 3000 needs to be driven, the phase of the third power supply is adjusted by adjusting the fifth pulse width modulation signal and the sixth pulse width modulation signal, so that the phase difference between the first power supply and the third power supply is gradually increased.

[0065] This embodiment enables each skylight glass to share part of the circuit structure by setting a common terminal, which is beneficial to reducing the size of the electrical equipment including the voltage driving circuit 1000 and saving hardware costs.

[0066] In one embodiment, if Figure 4 As shown, the voltage driving circuit 1000 further includes a first driving branch 70 , a second driving branch 80 and a third driving branch 90 .

[0067] The first driving branch 70 is connected between the controller 200 and the first end of the first switch branch 10, and is connected between the controller 200 and the first end of the second switch branch 20. The first driving branch 70 is used to output a first sub-pulse width modulation signal to the first switch branch 10 based on the first pulse width modulation signal, and output a second sub-pulse width modulation signal to the second switch branch 20 based on the second pulse width modulation signal. The level of the first sub-pulse width modulation signal is the same as that of the first pulse width modulation signal, and the driving ability of the first sub-pulse width modulation signal is stronger than that of the first pulse width modulation signal, and the level of the second sub-pulse width modulation signal is the same as that of the second pulse width modulation signal, and the driving ability of the second sub-pulse width modulation signal is stronger than that of the second pulse width modulation signal.

[0068] The second driving branch 80 is connected between the controller 200 and the first end of the third switch branch 30, and is connected between the controller 200 and the first end of the fourth switch branch 40. The second driving branch 80 is used to output a third sub-pulse width modulation signal to the third switch branch 30 based on the third pulse width modulation signal, and output a fourth sub-pulse width modulation signal to the fourth switch branch 40 based on the fourth pulse width modulation signal, wherein the level of the third sub-pulse width modulation signal is the same as that of the third pulse width modulation signal, and the driving capability of the third sub-pulse width modulation signal is stronger than that of the third pulse width modulation signal, and the level of the fourth sub-pulse width modulation signal is the same as that of the fourth pulse width modulation signal, and the driving capability of the fourth sub-pulse width modulation signal is stronger than that of the fourth pulse width modulation signal.

[0069] The third driving branch 90 is connected between the controller 200 and the first end of the fifth switch branch 50, and is connected between the controller 200 and the first end of the sixth switch branch 60. The third driving branch 90 is used to output a fifth sub-pulse width modulation signal to the fifth switch branch 50 based on the fifth pulse width modulation signal, and output a sixth sub-pulse width modulation signal to the sixth switch branch 60 based on the sixth pulse width modulation signal, wherein the level of the fifth sub-pulse width modulation signal is the same as that of the fifth pulse width modulation signal, and the driving capability of the fifth sub-pulse width modulation signal is stronger than that of the fifth pulse width modulation signal, and the level of the sixth sub-pulse width modulation signal is the same as that of the sixth pulse width modulation signal, and the driving capability of the sixth sub-pulse width modulation signal is stronger than that of the sixth pulse width modulation signal.

[0070] By setting the first drive branch 70, the second drive branch 80 and the third drive branch 90, the ability to drive each switch branch (such as the first switch branch 10) can be enhanced to enhance the driving capability, so that each switch branch can be driven quickly to quickly switch between the on and off states, thereby improving the response speed of the system. At the same time, it can ensure that each switch branch can be fully turned on to ensure the normal operation of each switch branch, improve its reliability, reduce the failure rate, and extend the service life of the device.

[0071] In one embodiment, if Figure 5As shown, the voltage driving circuit 1000 further includes a first signal processing branch 100 , a second signal processing branch 110 and a third signal processing branch 120 .

[0072] The first signal processing branch 100 is connected to the first connection point N1 and the first end of the first curtain glass 2000. The first signal processing branch 100 is used to filter the first power supply and implement electrostatic protection, wherein the first connection point N1 is the connection point between the second end of the first switch branch 10 and the third end of the second switch branch 20. The second signal processing branch 110 is connected to the second connection point N2 and the second end of the first curtain glass 2000. The second signal processing branch 110 is used to filter the second power supply and implement electrostatic protection, wherein the second connection point N2 is the connection point between the second end of the third switch branch 30 and the third end of the fourth switch branch 40. The third signal processing branch 120 is connected to the third connection point N3 and the second end of the second curtain glass 3000. The third signal processing branch 120 is used to filter the third power supply and implement electrostatic protection, wherein the third connection point N3 is the connection point between the second end of the fifth switch branch 50 and the third end of the sixth switch branch 60.

[0073] By providing the first signal processing branch 100, the second signal processing branch 110 and the third signal processing branch 120, noise and clutter in each power supply (including the first power supply, the second power supply and the third power supply) can be filtered out, thereby improving the quality of the signal. At the same time, it can also prevent electrostatic discharge from damaging the first curtain glass 2000 and the second curtain glass 3000, thereby improving stability and reliability.

[0074] It should be noted that when more than two skylight glasses need to be driven, corresponding branches can be added with reference to the method of driving the second skylight glass 3000. Figure 6 As shown, when it is necessary to drive the third skylight glass 4000, the voltage driving circuit 1000 also includes a fourth driving branch 130, a seventh switch branch 140, an eighth switch branch 150 and a fourth signal processing branch 160. The specific implementation process can refer to the above description of the second skylight glass 3000, which is within the scope that can be easily understood by those skilled in the art and will not be repeated here.

[0075] Please refer to Figure 7 , Figure 7 An example is shown with Figure 5 A circuit structure corresponding to the structure shown in FIG. Figure 7As shown, the first switch branch 10 includes a first switch tube Q1, the second switch branch 20 includes a second switch tube Q2, the third switch branch 30 includes a third switch tube Q3, the fourth switch branch 40 includes a fourth switch tube Q4, the fifth switch branch 50 includes a fifth switch tube Q5, and the sixth switch branch 60 includes a sixth switch tube Q6.

[0076] Among them, the first end of the first switch tube Q1 and the first end of the second switch tube Q2 are both connected to the controller 200, the second end of the first switch tube Q1 is respectively connected to the third end of the second switch tube Q2 and the first end of the first screen glass 2000, the third end of the first switch tube Q1 is connected to the DC power supply VC, and the second end of the second switch tube Q2 is grounded GND.

[0077] A first end of the third switch tube Q3 and a first end of the fourth switch tube Q4 are both connected to the controller 200, a second end of the third switch tube Q3 is respectively connected to a third end of the fourth switch tube Q4 and a second end of the first screen glass 2000, a third end of the third switch tube Q3 is connected to a DC power supply VC, and a second end of the fourth switch tube Q4 is grounded GND.

[0078] A first end of the fifth switch tube Q5 and a first end of the sixth switch tube Q6 are both connected to the controller 200, a second end of the fifth switch tube Q5 is respectively connected to a third end of the sixth switch tube Q6 and a second end of the second curtain glass 2000, a third end of the fifth switch tube Q5 is connected to a DC power supply VC, and a second end of the sixth switch tube Q6 is grounded GND.

[0079] In the embodiment of the present application, each switch tube (such as the first switch tube Q1) is an NMOS tube as an example. The gate of the NMOS tube is the first end of each switch tube, the source of the NMOS tube is the second end of each switch tube, and the drain of the NMOS tube is the third end of each switch tube.

[0080] In addition, each switch tube can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.

[0081] In this embodiment, the first switch branch 10 further includes a thirteenth capacitor C13 and a seventh resistor R7, and the thirteenth capacitor C13 and the seventh resistor R7 are connected in series between the source and the drain of the first switch tube Q1. The thirteenth capacitor C13 and the seventh resistor R7 are connected in series to form a damping absorption circuit, and the peak voltage is suppressed by charging and discharging the thirteenth capacitor C13 to limit the drain overvoltage and voltage rise rate of the first switch tube Q1, thereby protecting the first switch tube Q1.

[0082] The second switch branch 20 further includes a fourteenth capacitor C14 and an eighth resistor R8, and the fourteenth capacitor C14 and the eighth resistor R8 are connected in series between the source and the drain of the second switch tube Q2. The fourteenth capacitor C14 and the eighth resistor R8 are connected in series to form a damping absorption circuit, and the peak voltage is suppressed by charging and discharging the fourteenth capacitor C14 to limit the drain overvoltage and voltage rise rate of the second switch tube Q2, thereby protecting the second switch tube Q2.

[0083] The third switch branch 30 further includes a fifteenth capacitor C15 and a ninth resistor R9, which are connected in series between the source and drain of the third switch tube Q3. The fifteenth capacitor C15 and the ninth resistor R9 are connected in series to form a damping absorption circuit, which suppresses the peak voltage by charging and discharging the fifteenth capacitor C15, so as to limit the drain overvoltage and voltage rise rate of the third switch tube Q3, thereby protecting the third switch tube Q3.

[0084] The fourth switch branch 40 further includes a sixteenth capacitor C16 and a tenth resistor R10, which are connected in series between the source and the drain of the fourth switch tube Q4. The sixteenth capacitor C16 and the tenth resistor R10 are connected in series to form a damping absorption circuit, which suppresses the peak voltage by charging and discharging the sixteenth capacitor C16, so as to limit the drain overvoltage and voltage rise rate of the fourth switch tube Q4, thereby protecting the fourth switch tube Q4.

[0085] The fifth switch branch 50 further includes a seventeenth capacitor C17 and an eleventh resistor R11, which are connected in series between the source and the drain of the fifth switch tube Q5. The seventeenth capacitor C17 and the eleventh resistor R11 are connected in series to form a damping absorption circuit, which suppresses the peak voltage by charging and discharging the seventeenth capacitor C17, so as to limit the drain overvoltage and voltage rise rate of the fifth switch tube Q5, thereby protecting the fifth switch tube Q5.

[0086] The sixth switch branch 60 further includes an eighteenth capacitor C18 and a twelfth resistor R12, and the eighteenth capacitor C18 and the twelfth resistor R12 are connected in series between the source and the drain of the sixth switch tube Q6. The eighteenth capacitor C18 and the twelfth resistor R12 are connected in series to form a damping absorption circuit, and the peak voltage is suppressed by charging and discharging the eighteenth capacitor C18 to limit the drain overvoltage and voltage rise rate of the sixth switch tube Q6, thereby protecting the sixth switch tube Q6.

[0087] In this embodiment, the first driving branch 70 includes a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2 and a first driving chip U1.

[0088] The first resistor R1 and the first capacitor C1 are connected in series between the controller 200 and the ground GND, the connection point between the first resistor R1 and the first capacitor C1 is connected to the first input terminal of the first driver chip U1, and the first output terminal of the first driver chip U1 is connected to the first terminal of the first switch branch 10. The second resistor R2 and the second capacitor C2 are connected in series between the controller 200 and the ground GND, the connection point between the second resistor R2 and the second capacitor C2 is connected to the second input terminal of the first driver chip U1, and the second output terminal of the first driver chip U1 is connected to the first terminal of the second switch branch 20.

[0089] Specifically, the first resistor R1 and the first capacitor C1 form an RC filter circuit, and the second resistor R2 and the second capacitor C2 form an RC filter circuit. The first driver chip U1 is used to enhance the driving capability of the first pulse width modulation signal and the second pulse width modulation signal. In some embodiments, the first driver chip U1 is a UCC27282 chip.

[0090] In this embodiment, the second driving branch 80 includes a third resistor R3, a fourth resistor R4, a third capacitor C3, a fourth capacitor C4 and a second driving chip U2.

[0091] The third resistor R3 and the third capacitor C3 are connected in series between the controller 200 and the ground GND, the connection point between the third resistor R3 and the third capacitor C3 is connected to the first input terminal of the second driver chip U2, and the first output terminal of the second driver chip U2 is connected to the first end of the third switch branch 30. The fourth resistor R4 and the fourth capacitor C4 are connected in series between the controller 200 and the ground GND, the connection point between the fourth resistor R4 and the fourth capacitor C4 is connected to the second input terminal of the second driver chip U2, and the second output terminal of the second driver chip U2 is connected to the first end of the fourth switch branch 40.

[0092] Specifically, the third resistor R3 and the third capacitor C3 form an RC filter circuit, and the fourth resistor R4 and the fourth capacitor C4 form an RC filter circuit. The second driver chip U2 is used to enhance the driving capability of the third pulse width modulation signal and the fourth pulse width modulation signal. In some embodiments, the second driver chip U2 is a UCC27282 chip.

[0093] In this embodiment, the third driving branch 90 includes a fifth resistor R5, a sixth resistor R6, a fifth capacitor C5, a sixth capacitor C6 and a third driving chip U3.

[0094] The fifth resistor R5 and the fifth capacitor C5 are connected in series between the controller and the ground, the connection point between the fifth resistor R5 and the fifth capacitor C5 is connected to the first input terminal of the third driver chip U3, and the first output terminal of the third driver chip U3 is connected to the first end of the fifth switch branch 50. The sixth resistor R6 and the sixth capacitor C6 are connected in series between the controller 200 and the ground GND, the connection point between the sixth resistor R6 and the sixth capacitor C6 is connected to the second input terminal of the third driver chip U3, and the second output terminal of the third driver chip U3 is connected to the first end of the sixth switch branch 60.

[0095] Specifically, the fifth resistor R5 and the fifth capacitor C5 form an RC filter circuit, and the sixth resistor R6 and the sixth capacitor C6 form an RC filter circuit. The third driver chip U3 is used to enhance the driving capability of the third pulse width modulation signal and the fourth pulse width modulation signal. In some embodiments, the third driver chip U3 is a UCC27282 chip.

[0096] In this embodiment, the first signal processing branch 100 includes a first inductor L1, a seventh capacitor C7, an eighth capacitor C8 and a first electrostatic protection diode DW1, the second signal processing branch 110 includes a second inductor L2, a ninth capacitor C9, a tenth capacitor C10 and a second electrostatic protection diode DW2, and the third signal processing branch 120 includes a third inductor L3, an eleventh capacitor C11, a twelfth capacitor C12 and a third electrostatic protection diode DW3.

[0097] Among them, the first inductor L1 and the seventh capacitor C7 are connected in series between the first connection point N1 and the ground GND, and the eighth capacitor C8 is connected in parallel with the seventh capacitor C7 and the first electrostatic protection diode DW1. The second inductor L2 and the ninth capacitor C9 are connected in series between the second connection point N2 and the ground GND, and the tenth capacitor C10 is connected in parallel with the ninth capacitor C9 and the second electrostatic protection diode DW2. The third inductor L3 and the eleventh capacitor C11 are connected in series between the third connection point N3 and the ground GND, and the twelfth capacitor C12 is connected in parallel with the eleventh capacitor C11 and the third electrostatic protection diode DW3.

[0098] Specifically, the first inductor L1, the seventh capacitor C7 and the eighth capacitor C8 are used for filtering, the second inductor L2, the ninth capacitor C9 and the tenth capacitor C10 are used for filtering, and the third inductor L3, the eleventh capacitor C11 and the twelfth capacitor C12 are used for filtering. The first electrostatic protection diode DW1, the second electrostatic protection diode DW2 and the third electrostatic protection diode DW3 are used to implement electrostatic protection to prevent electrostatic discharge from damaging the first curtain glass 2000 and the second curtain glass 3000.

[0099] An embodiment of the present application further provides an electrical device, which includes at least one skylight glass and the voltage driving circuit 1000 in any embodiment of the present application.

[0100] When at least one skylight glass includes only one skylight glass, for example, at least one skylight glass includes only the first skylight glass, the following method can be used: Figure 1 The structure shown drives the first curtain glass.

[0101] When at least one skylight glass includes two or more skylight glasses, for example, at least one skylight glass includes only the first skylight glass and the second skylight glass, the following method can be used to obtain the skylight glass: Figure 3-Figure 5 and Figure 7 The structure shown drives the first curtain glass and the second curtain glass.

[0102] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

[0103] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Under the idea of ​​the present application, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order. It should be understood by ordinary technicians in this field that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A voltage driving circuit, characterized in that: Used to drive the first curtain glass, the voltage driving circuit includes a controller, a first switch branch, a second switch branch, a third switch branch and a fourth switch branch; The controller is respectively connected to the first end of the first switch branch, the first end of the second switch branch, the first end of the third switch branch and the first end of the fourth switch branch, the third end of the first switch branch and the third end of the third switch branch are both connected to a DC power supply, the second end of the first switch branch is respectively connected to the third end of the second switch branch and the first end of the first skylight glass, and the second end of the third switch branch is respectively connected to the third end of the fourth switch branch and the second end of the first skylight glass; The controller is used to output a first pulse width modulation signal, a second pulse width modulation signal, a third pulse width modulation signal and a fourth pulse width modulation signal; The first switch branch is turned on or off in response to the first pulse width modulation signal, and the second switch branch is turned on or off in response to the second pulse width modulation signal, so as to convert the DC power supply into a first power supply and input it to the first end of the first skylight glass, wherein the waveform of the DC power supply is a sine wave, and the waveform of the first power supply is a T-type wave; The third switch branch is turned on or off in response to the third pulse width modulation signal, and the fourth switch branch is turned on or off in response to the fourth pulse width modulation signal to convert the DC power supply into a second power supply and input it to the second end of the first skylight glass, wherein the waveform of the second power supply is a T-type wave.

2. The voltage driving circuit according to claim 1, characterized in that: It is also used to drive the second curtain glass, and the voltage driving circuit also includes a fifth switch branch and a sixth switch branch; The controller is connected to the first end of the fifth switch branch and the first end of the sixth switch branch respectively, the third end of the fifth switch branch is connected to the DC power supply, the second end of the fifth switch branch is connected to the third end of the sixth switch branch and the second end of the second curtain glass respectively, and the first end of the second curtain glass is connected to the first end of the first curtain glass; The controller is also used to output a fifth pulse width modulation signal and a sixth pulse width modulation signal; The fifth switch branch is turned on or off in response to the fifth pulse width modulation signal, and the sixth switch branch is turned on or off in response to the sixth pulse width modulation signal, so as to convert the DC power supply into a third power supply and input it to the second end of the second curtain glass, wherein the waveform of the third power supply is a T-type wave.

3. The voltage driving circuit according to claim 2, characterized in that: Also includes: a first driving branch, connected between the controller and the first end of the first switch branch, and connected between the controller and the first end of the second switch branch, for outputting a first sub-pulse width modulation signal to the first switch branch based on the first pulse width modulation signal, and outputting a second sub-pulse width modulation signal to the second switch branch based on the second pulse width modulation signal, wherein the level of the first sub-pulse width modulation signal is the same as that of the first pulse width modulation signal, and the driving capability of the first sub-pulse width modulation signal is stronger than that of the first pulse width modulation signal, and the level of the second sub-pulse width modulation signal is the same as that of the second pulse width modulation signal, and the driving capability of the second sub-pulse width modulation signal is stronger than that of the second pulse width modulation signal; a second driving branch, connected between the controller and the first end of the third switch branch, and connected between the controller and the first end of the fourth switch branch, for outputting a third sub-pulse width modulation signal to the third switch branch based on the third pulse width modulation signal, and outputting a fourth sub-pulse width modulation signal to the fourth switch branch based on the fourth pulse width modulation signal, wherein the level of the third sub-pulse width modulation signal is the same as that of the third pulse width modulation signal, and the driving capability of the third sub-pulse width modulation signal is stronger than that of the third pulse width modulation signal, and the level of the fourth sub-pulse width modulation signal is the same as that of the fourth pulse width modulation signal, and the driving capability of the fourth sub-pulse width modulation signal is stronger than that of the fourth pulse width modulation signal; The third driving branch is connected between the controller and the first end of the fifth switch branch, and is connected between the controller and the first end of the sixth switch branch, and is used to output a fifth sub-pulse width modulation signal to the fifth switch branch based on the fifth pulse width modulation signal, and output a sixth sub-pulse width modulation signal to the sixth switch branch based on the sixth pulse width modulation signal, wherein the level of the fifth sub-pulse width modulation signal is the same as that of the fifth pulse width modulation signal, and the driving ability of the fifth sub-pulse width modulation signal is stronger than that of the fifth pulse width modulation signal, and the level of the sixth sub-pulse width modulation signal is the same as that of the sixth pulse width modulation signal, and the driving ability of the sixth sub-pulse width modulation signal is stronger than that of the sixth pulse width modulation signal.

4. The voltage driving circuit according to claim 2, characterized in that: Also includes: A first signal processing branch, connected to a first connection point and a first end of the first skylight glass, for filtering the first power supply and implementing electrostatic protection, wherein the first connection point is a connection point between the second end of the first switch branch and the third end of the second switch branch; a second signal processing branch, connected to a second connection point and the second end of the first skylight glass, for filtering the second power supply and implementing electrostatic protection, wherein the second connection point is a connection point between the second end of the third switch branch and the third end of the fourth switch branch; The third signal processing branch is connected to the third connection point and the second end of the second curtain glass, and is used to filter the third power supply and implement electrostatic protection, wherein the third connection point is the connection point between the second end of the fifth switch branch and the third end of the sixth switch branch.

5. The voltage driving circuit according to claim 2, characterized in that: The first switch branch includes a first switch tube, the second switch branch includes a second switch tube, the third switch branch includes a third switch tube, the fourth switch branch includes a fourth switch tube, the fifth switch branch includes a fifth switch tube, and the sixth switch branch includes a sixth switch tube; The first end of the first switch tube and the first end of the second switch tube are both connected to the controller, the second end of the first switch tube is respectively connected to the third end of the second switch tube and the first end of the first skylight glass, the third end of the first switch tube is connected to the DC power supply, and the second end of the second switch tube is grounded; The first end of the third switch tube and the first end of the fourth switch tube are both connected to the controller, the second end of the third switch tube is respectively connected to the third end of the fourth switch tube and the second end of the first skylight glass, the third end of the third switch tube is connected to the DC power supply, and the second end of the fourth switch tube is grounded; The first end of the fifth switch tube and the first end of the sixth switch tube are both connected to the controller, the second end of the fifth switch tube is respectively connected to the third end of the sixth switch tube and the second end of the second curtain glass, the third end of the fifth switch tube is connected to the DC power supply, and the second end of the sixth switch tube is grounded.

6. The voltage driving circuit according to claim 3, characterized in that: The first driving branch includes a first resistor, a second resistor, a first capacitor, a second capacitor and a first driving chip; The first resistor and the first capacitor are connected in series between the controller and the ground, the connection point between the first resistor and the first capacitor is connected to the first input terminal of the first driver chip, and the first output terminal of the first driver chip is connected to the first terminal of the first switch branch; The second resistor and the second capacitor are connected in series between the controller and the ground, the connection point between the second resistor and the second capacitor is connected to the second input end of the first driver chip, and the second output end of the first driver chip is connected to the first end of the second switch branch.

7. The voltage driving circuit according to claim 3, characterized in that: The second driving branch includes a third resistor, a fourth resistor, a third capacitor, a fourth capacitor and a second driving chip; The third resistor and the third capacitor are connected in series between the controller and the ground, the connection point between the third resistor and the third capacitor is connected to the first input terminal of the second driver chip, and the first output terminal of the second driver chip is connected to the first terminal of the third switch branch; The fourth resistor and the fourth capacitor are connected in series between the controller and the ground, a connection point between the fourth resistor and the fourth capacitor is connected to the second input end of the second driver chip, and a second output end of the second driver chip is connected to the first end of the fourth switch branch.

8. The voltage driving circuit according to claim 3, characterized in that: The third driving branch includes a fifth resistor, a sixth resistor, a fifth capacitor, a sixth capacitor and a third driving chip; The fifth resistor and the fifth capacitor are connected in series between the controller and the ground, the connection point between the fifth resistor and the fifth capacitor is connected to the first input terminal of the third driver chip, and the first output terminal of the third driver chip is connected to the first terminal of the fifth switch branch; The sixth resistor and the sixth capacitor are connected in series between the controller and the ground, the connection point between the sixth resistor and the sixth capacitor is connected to the second input end of the third driver chip, and the second output end of the third driver chip is connected to the first end of the sixth switch branch.

9. The voltage driving circuit according to claim 4, characterized in that: The first signal processing branch includes a first inductor, a seventh capacitor, an eighth capacitor and a first electrostatic protection diode, the second signal processing branch includes a second inductor, a ninth capacitor, a tenth capacitor and a second electrostatic protection diode, and the third signal processing branch includes a third inductor, an eleventh capacitor, a twelfth capacitor and a third electrostatic protection diode; The first inductor and the seventh capacitor are connected in series between the first connection point and the ground, and the eighth capacitor is connected in parallel with the seventh capacitor and the first electrostatic protection diode; The second inductor and the ninth capacitor are connected in series between the second connection point and the ground, and the tenth capacitor is connected in parallel with the ninth capacitor and the second electrostatic protection diode; The third inductor and the eleventh capacitor are connected in series between a third connection point and the ground, and the twelfth capacitor is connected in parallel with the eleventh capacitor and the third electrostatic protection diode.

10. An electrical device, characterized in that: It comprises at least one skylight glass and a voltage driving circuit as described in any one of claims 1 to 9.

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