TWI411908B - A power supply and a developing device using the same - Google Patents

Abstract

This invention is a power supply and a display device which utilizes the power supply. By means of the comparison of a first comparator inside a voltage adjusting circuit with a driving power related voltage of a driving power source, and a load related voltage of a related load, a trigger unit is controlled to trigger a controlling unit or not so as to control the on/off of at least one first switch component in order to adjust the driving power source according to the comparison results. As a result, this design can increase overall system efficiency by automatically adjusting the driving power source according to the value of the load.

Description

Power supply and developing device using same

The present invention relates to a power supply device and a developing device using the same, and more particularly to a power supply device capable of automatically adjusting a driving power source and a developing device using the same.

With the rapid development of the electronics industry, modern society is increasingly relying on the services and functions of various electronic products to replace the past human-executed affairs, in order to maintain good production efficiency.

However, for electronic products, the effective use of electricity is an important reason for affecting whether it has good production efficiency, not manpower. Therefore, when planning the power control system of an electronic product, the power supply is executed according to the electronic environmental conditions required to maintain the safe operation of the load, and the parameters such as the voltage, current, and frequency of the power supply are set. A power handling program between the external power supply and the load causes it to supply a load to the drive power.

However, once the specifications of the power supply are set, the electronic characteristics of the driving power supply provided are maintained. In order to be unaffected by the different characteristics of the load, the power supply provided by the power supply is usually much higher than the operating voltage of the load, so that a considerable amount of power is wasted between the input power and the output power. This will not only affect the overall performance, but also generate a lot of waste heat, and the problem of heat dissipation needs to be solved. Therefore, how to reduce the power waste between the power supply and the power output of the power supply system has been a problem that has been solved urgently.

SUMMARY OF THE INVENTION One object of the present invention is to provide a power supply and a developing device using the same, which can automatically adjust the driving power according to the electronic characteristics of the load.

Another object of the present invention is to provide a power supply and a developing device using the same, which can reduce power waste between the power supply and the output power of the power supply to improve overall performance.

According to the present invention, there is provided a power supply for supplying power to at least one load, comprising a conversion circuit and a voltage regulation circuit. The conversion circuit includes a control unit, at least one first switching element, and a converter. The control unit is coupled to the first switching element to control the turning on and off of the first switching element. The first switching element receives a first power source and outputs a second power source. The converter receives the second power source and outputs a driving power source to drive the load. The voltage regulating circuit includes a first comparing component and a triggering unit. The trigger unit is coupled to the first comparison component and the control unit, and the first comparison component is coupled to the converter and the load respectively to receive one of a driving power related voltage and a load related voltage related to the driving power. The first comparison component compares the driving power-related voltage and the load-related voltage, and controls whether the triggering unit triggers the control unit to control the conduction and the closing of the first switching component according to the comparison result, thereby adjusting the driving power.

According to the present invention, there is provided a developing device for receiving an image data, comprising an imaging module, a driving circuit and a power supply. The imaging module includes at least one load, and the imaging module projects an image according to the image data. The drive circuit drives the load according to a driving power source. The power supply can be powered, and it includes a conversion circuit and a voltage regulation circuit. The conversion circuit includes a control unit, at least one first switching element, and a converter. The control unit is coupled to the first switching element to control the turning on and off of the first switching element. The first switching element receives a first power source and outputs a second power source, and the converter receives the second power source and outputs the driving power source. The voltage regulating circuit includes a first comparing component and a triggering unit. The triggering unit is coupled to the first comparing component and the control unit, and the first comparing component is coupled to the converter and the load respectively to receive a driving power related voltage related to the driving power source. And one of the load-related voltages associated with the load. The first comparison component compares the driving power-related voltage and the load-related voltage, and controls whether the triggering unit triggers the control unit to control the conduction and the closing of the first switching component according to the comparison result, thereby adjusting the driving power.

In the foregoing imaging device, the imaging module may further include at least one dimming component and a projection lens to adjust and project the image, and the driving circuit preferably drives the load to emit a light, so that the light is processed by the dimming component and the projection lens. Project an image. The dimming element can be any combination of a liquid crystal panel, a single crystal germanium liquid crystal display panel, and a digital microchip device.

The load may be a load generated by any component, which may refer to a total load in a system or a load (and) of one or more electronic components. Preferably, it may be a light emitting diode or an organic light emitting diode. And any combination of laser diodes. The control unit can be any form of control element that depends on the architecture of the first switching element and the converter, preferably a pulse width modulation (PWM) controller.

The first switching element may be any electronic or mechanical switching element, preferably an electronic switching element, such as a transistor, a bipolar transistor, a metal-oxide layer-semiconductor field effect transistor or other form of electron. Switching element. The first switching element can have a duty cycle, so when the first comparison component determines that the driving power supply related voltage is greater than the load related voltage, the first comparison component can enable the triggering unit to trigger the control unit to reduce the duty cycle of the first switching component, even It is the duty cycle of turning off the first switching element, which is based on the demand. When the first comparison component determines that the drive power related voltage is less than or equal to the load related voltage, the first comparison component may disable the trigger unit.

The triggering mechanism of the trigger unit is not limited, and preferably includes a second switching component and a coupler. The second switching component is coupled to the coupler. The triggering unit is coupled to the coupler by the second switching component. Components and control unit. The second switching element can be any electronic or mechanical switching element, preferably an electronic switching element such as a transistor, a bipolar transistor, a metal-oxide layer-semiconductor field effect transistor or other form of electronic Switching element. The coupler can be any coupler that achieves coupling through light, electricity, sound waves, and force, and an example thereof is an optical coupler, which can include one of the light-emitting diodes electrically connected to the second switching element and one of the electrical connection control units. Crystal. Therefore, when the trigger unit is enabled, the second switching element is turned on, and the light emitting diode emits light to the photoelectric crystal to trigger the control unit to reduce or close the duty cycle of the first switching element.

The voltage regulating circuit may further include a second comparing component, wherein the two input ends are respectively coupled to the two ends of the load to output the load related voltage to the first comparing component. The first comparison element and the second comparison element can each perform a comparison of voltage characteristics, which is preferably an operational amplifier. Secondly, the voltage regulating circuit may further include at least one diode or at least one resistor to obtain a driving power-related voltage or a load-related voltage. The connection manner of the diode or the resistor is not limited. For example, one way is that the resistor is Electrically connected between the first comparison component and the converter, the diode is electrically connected between the first comparison component and the load, so that the driving power supply related voltage is generated after the driving power source is divided by the resistor, and the load related voltage is the two ends of the load. The sum of the voltage drop and the voltage drop of the diode; the other connection method is that the diode is electrically connected between the converter and the resistor, the resistor is electrically connected to the first comparison component, and the voltage associated with the driving power source is the driving power source and the diode The difference in bulk voltage drop is then generated by resistor divider.

The above converter may be any type of power converter, such as an isolated converter, an autotransformer or a resonant converter, etc., preferably an LLC series resonant converter. The converter may include a first winding, a second winding and at least one rectifying diode, the first winding being electrically connected to the first switching element and the second winding, respectively, and the rectifying diode is electrically connected to the second winding The second power source outputted by the first switching element is applied to the first winding, the second winding generates a third power source, and the rectifying diode rectifies the third power source to output the driving power source.

Therefore, comparing a driving power-related voltage associated with a driving power source and a load-related voltage associated with a load through a first comparing component in a voltage regulating circuit, and controlling whether a triggering unit triggers a control unit according to the comparison result. Controlling the conduction and deactivation of at least one first switching element, thereby adjusting the manner of driving the power supply, and automatically adjusting the driving power according to the electronic characteristics of the load, thereby reducing power waste between the input power supply and the output power supply of the power supply, thereby improving the overall Performance.

The embodiments of the present invention are described in the following with reference to the accompanying drawings, which are intended to be illustrative only, and the scope of the claims should be .

First, please refer to FIG. 1 , which is a functional block diagram of a developing device according to a first embodiment of the present invention. In the embodiment, the imaging device 1 receives an image data. The imaging device 1 includes an imaging module 10, a driving circuit 20, and a power supply 30. The imaging device 1 is an example of a projector. The imaging module 10 projects an image according to the received image data, and includes at least one load 11 and at least one dimming component 12 and a projection lens 13 and the like. Configured components. Therefore, the load 11 herein may be a light emitting diode, such as any combination of red, green, and blue light emitting diodes, and the dimming element 12 may be a liquid crystal panel, a single crystal germanium liquid crystal display panel, and a digital micro. In any combination of the wafer devices, the projection lens 13 is used to adjust the optical characteristics of the image so that it is clearly projected.

The driving circuit 20 drives the load 11 according to a driving power source to emit light, so that the emitted light is optically processed by the dimming element 12 and the projection lens 13 on the optical path to project an image. The architecture of the drive circuit 20 depends on the number and electronic characteristics of the load 11, and it is not necessary to limit the form of the drive circuit 20 here.

The power supply 30 can supply electrical energy to the load 11, which includes an selectively configurable rectifying circuit 31 and a converting circuit 32 and a voltage regulating circuit 33. The rectifier circuit 31 can be a bridge rectifier circuit or other form of rectifier circuit that receives an AC power source (AC) and processes it into a DC power supply output to the conversion circuit 32.

Please also refer to FIG. 2, which is a schematic diagram showing the architecture of the conversion circuit 32 and the voltage regulation circuit 33 of the first embodiment. As shown in the figure, the conversion circuit 32 includes a control unit 321, a first switching element M1, M2 and a converter 323. In this embodiment, the control unit 321 is a pulse width modulation (PWM) controller, such as an L6599 wafer, and the first switching elements M1 and M2 are respectively a metal-oxide-semiconductor field effect transistor (MOS FET). The converter 323 is an LLC serial resonant converter. Depending on the specifications of the control unit 321 used herein, the electronic characteristics of the load 11, and the type of converter 323 being controlled, various combinations of pin configurations of the control unit 321 can be devised without limiting the exemplary embodiments thereof. A configuration method. Here, the 15th pin of the control unit 321 is coupled to the gate of the first switching element M1, the 11th pin is coupled to the gate of the first switching element M2, and the 5th pin is coupled. The operation relationship between the control unit 321 and the first switching elements M1, M2 and the photo-crystal T1 will be described in detail in the following paragraphs.

A first switching element M1, M2 received from the rectifier circuit 31 and outputs the DC power supply V _in to a second power converter 323. The control unit 321 controls the on and off of the first switching elements M1, M2 and thereby adjusts the driving power source V _D . As shown in FIG. 4, the first switching elements M1, M2 each have a job under the control of the control unit 321 Cycle, the first switching element M1 is actuated according to the duty cycle HVG, and the first switching element M2 is actuated according to the duty cycle LVG, and the two alternately switch the on and off times to adjust the characteristics of the driving power source V _D , such as: voltage value .

The converter 323 includes a first winding W1, a second winding W2, and rectifying diodes Z1 to Z6. The first winding W1 is electrically connected to the first switching elements M1, M2 and coupled to the second winding W2, respectively. The second power source is applied to the first winding W1 through the second power source outputted by the first switching element M1, M2, so that the second winding W2 generates a third power source, and is electrically connected to the rectifying diode Z1 of the second winding W2. After Z6 rectifies the third power source, the driving power source V _D is output to the driving circuit 20. Here, the rectifying diodes Z1 to Z6 are all Jenus diodes, so that the voltage value of the driving power source V _D can be stabilized. As described above, after the drive circuit 20 receives the drive power V _D , the load 11 can be driven to emit light.

The voltage regulating circuit 33 includes a first comparing element OP1, a triggering unit 331, resistors R1 and R2, and diodes D1 and D2. The first comparison component OP1 is an operational amplifier having two inputs and an output. The two input terminals of the first comparison component OP1 are respectively coupled to the converter 323 and the load 11 for receiving the driving power V _D . One drives the power supply related voltage and one of the load related voltages associated with the load 11. The triggering unit 331 is coupled to the first comparing component OP1 and the control unit 321 respectively. The triggering unit 331 includes a second switching component Q1 and a coupler 3311 coupled to each other. The second switching element Q1 is a transistor whose base is coupled to the output end of the first comparison element OP1 and the emitter is coupled to the coupler 3311. The coupler 3311 is an optocoupler, and includes a light-emitting diode LED 2 electrically connected to the second switching element Q1 and a photo-crystal T1 electrically connected to the fifth pin of the control unit 321, and the photo-crystal T1 can detect the light-emitting diode The light emitted by the body LED2. The resistors R1 and R2 are electrically connected in series to each other between the input terminal of the first comparison element OP1 and the converter 323, so that the driving power supply related voltage is generated by dividing the driving power source V _D by the resistors R1 and R2. The diodes D1, D2 are also electrically connected in series to each other between the other input terminal of the first comparison element OP1 and the load 11, so that the load-related voltage is the voltage drop (V _t ) across the load 11 and the diode D1. , the sum of the voltage drops of D2. As a specific example, the optional diode D1, D2 operating voltage sum is 1.1 volts, so the load-dependent voltage is V _t +1.1 volts.

When the first comparison component OP1 compares the driving power source related voltage associated with the driving power source V _D and the load related voltage associated with the load 11 , the first comparing component OP1 triggers the control unit 321 according to the comparison result to trigger the control unit 321 to The first switching elements M1, M2 are controlled to be turned on and off, thereby adjusting the driving power source V _D . According to the architecture of the embodiment, preferably, when the first comparison component OP1 determines that the driving power supply related voltage is greater than the load related voltage, the trigger unit 331 is enabled. The first comparison element OP1 controls the voltage of the base of the second switching element Q1 of the trigger unit 331 such that the emitter and collector of the second switching element Q1 are turned on. At this time, the LED LED 2 coupled to the emitter of the second switching element Q1 emits light to the photo-electric crystal T1, thereby changing the electronic characteristics of the fifth pin of the control unit 321, so that the trigger control unit 321 controls the first switching element. The duty cycle of the on and off of M1, M2 is reduced, and even the first switching elements M1, M2 are turned off, so that the converter 323 adjusts the voltage value of the driving power source V _D downward. However, when the first comparison element OP determines that the driving power supply related voltage is less than or equal to the load related voltage, the first comparison element OP controls the second switching element Q1 base voltage to not turn on the second switching element Q1, thereby causing the trigger unit 331 to be lost. Can not adjust the drive power V _D . For the above special case, when the driving power supply voltage is higher than V _t +1.1 volts, the voltage value of the driving power supply V _D is automatically adjusted downward until the voltage value of the driving power supply V _D is adjusted to V _t +1.1 Below volts. Therefore, the power supply 30 can be different for the voltage characteristics of the load 11, such as: the operating voltages of the red, green, and blue LEDs are different, and the driving power V _{D is} automatically adjusted according to the electronic characteristics of the load 11, thereby reducing The power supply 30 inputs power waste between the power source and the output power source to improve overall performance.

Please refer to FIG. 3, which is a schematic structural diagram of a voltage regulating circuit of a power supply according to a second embodiment of the present invention. In order to simplify the description, only the differences between the present embodiment and the previous embodiment will be described, and the same points will not be described again. In this embodiment, the diodes D1, D2 of the voltage regulating circuit 33 of the present embodiment are electrically connected between the converter and the resistors R1, R2 electrically connected to the first comparing component OP1. Therefore, the driving power source is The correlation voltage is generated by the difference between the voltage drop of the driving power source V _D and the diode D1 and D2 and then divided by the resistors R1 and R2. For example, the driving power supply related voltage here is ((V _D -1.1) × (R2 / R1 + R2)) volts. Next, the voltage regulating circuit 33 further includes a second comparing element OP2, and the second comparing element OP2 is an operational amplifier like the first comparing element OP1. The two input ends of the second comparison element OP2 are respectively coupled to the two ends of the load 11, and the output end of the second comparison element OP2 is coupled to one of the input ends of the first comparison element OP1. Therefore, the second comparison element OP2 compares the voltage values across the load 11 to obtain the load-related voltage and outputs it to the first comparison element OP1, and the first comparison element OP1 is in the same manner as the previous embodiment. The correlation voltage is compared with a voltage related to the driving power source to control whether the trigger unit triggers the control unit to control the conduction and the closing of the first switching element according to the comparison result, thereby adjusting the driving power source V _D .

Therefore, as can be seen from the above, the present invention compares a driving power supply related voltage associated with a driving power source and a load related voltage associated with a load through a first comparing component in a voltage regulating circuit, according to the comparison result. Controlling whether a trigger unit triggers a control unit to control conduction and deactivation of at least one first switching element, thereby adjusting a manner of driving the power source, and automatically adjusting a driving power source according to an electronic characteristic of the load, thereby reducing power supply input and output of the power supply Power wasted between power supplies to improve overall performance.

1. . . Imaging device

10. . . Imaging module

11. . . load

12. . . Dimming element

13. . . Projection lens

20. . . Drive circuit

30. . . Power Supplier

31. . . Rectifier circuit

32. . . Conversion circuit

33. . . Voltage regulation circuit

321. . . control unit

323. . . converter

331. . . Trigger unit

3311. . . Coupler

D1, D2. . . Dipole

M1, M2. . . First switching element

Q1. . . Second switching element

T1. . . Photoelectric crystal

V _in . . . power supply

V _D . . . Drive power

W1. . . First winding

W2. . . Second winding

OP1. . . First comparison component

OP2. . . Second comparison component

LED2. . . Light-emitting diode

HVG, LVG. . . Working period

R1, R2,. . . resistance

Z1~Z6. . . Rectifier diode

FIG. 1 is a functional block diagram showing a developing device according to a first embodiment of the present invention.

FIG. 2 is a schematic structural view showing a conversion circuit and a voltage adjustment circuit of the first embodiment.

FIG. 3 is a schematic structural diagram of a voltage regulating circuit of a power supply device according to a second embodiment of the present invention.

FIG. 4 is a schematic diagram showing the duty cycle of the first switching element of the first embodiment.

1. . . Imaging device

10. . . Imaging module

11. . . load

12. . . Dimming element

13. . . Projection lens

20. . . Drive circuit

30. . . Power Supplier

31. . . Rectifier circuit

32. . . Conversion circuit

33. . . Voltage regulation circuit

Claims (30)

A power supply for supplying power to at least one load, comprising: a conversion circuit including a control unit, at least one first switching element, and a converter coupled to the at least one first switching element to control the Turning on and off at least one first switching element, the at least one first switching element receiving a first power source and outputting a second power source, the converter receiving the second power source and outputting a driving power source to drive the at least one load; And a voltage regulating circuit comprising a first comparing component and a triggering unit, the triggering unit comprising a second switching component and a coupler, wherein the second switching component is coupled to the coupler, wherein the triggering unit is respectively The second switching component is coupled to the first comparison component and the control unit, and the first comparison component is coupled to the converter and the at least one load respectively to receive a driving power supply related voltage associated with the driving power source and a load-related voltage associated with the at least one load, the first comparison component comparing the drive power-related voltage and the load-related voltage and comparing If the control unit is triggered to trigger the control unit to control the turn-on and off at least a first switching element, thereby adjusting the driving power. The power supply device of claim 1, wherein the at least one first switching element has a duty cycle, and the first comparison component determines that the driving power supply related voltage is greater than the load related voltage, the first comparison The component enables the trigger unit to trigger the control unit to reduce the duty cycle of the at least one first switching element. The power supply device of claim 2, wherein the trigger unit When enabled, the control unit is triggered to turn off the at least one first switching element. The power supply of claim 1, wherein the first comparing component disables the triggering unit when the first comparing component determines that the driving power source related voltage is less than or equal to the load related voltage. The power supply device of claim 1, wherein the at least one first switching element has a duty cycle, the coupler is an optical coupler, and the optical coupler includes one of the second switching elements electrically connected a light emitting diode and an optical crystal electrically connected to the control unit. When the trigger unit is enabled, the second switching element is turned on, and the light emitting diode emits light to the photoelectric crystal to trigger the control unit to reduce the at least one The duty cycle of the first switching element. The power supply of claim 5, wherein the control unit is triggered to turn off the at least one first switching element when the trigger unit is enabled. The power supply device of claim 1, wherein the voltage regulating circuit further comprises a second comparing component, wherein the two input ends of the second comparing component are respectively coupled to the two ends of the at least one load to output the The load related voltage is applied to the first comparison element. The power supply device of claim 7, wherein the first comparison component and the second comparison component are each an operational amplifier, and the second switching component is a transistor. The power supply device of claim 1, wherein the voltage regulating circuit further comprises at least one diode and at least one resistor, the at least one diode being electrically connected between the converter and the at least one resistor The at least one resistor and electrically connecting the first ratio The driving power supply related voltage is generated by a difference between the driving power source and the at least one diode voltage drop and then divided by the at least one resistor. The power supply device of claim 1, wherein the voltage regulating circuit further comprises at least one resistor electrically connected between the first comparing component and the converter, wherein the driving power supply related voltage is The driving power source is generated by dividing the at least one resistor. The power supply device of claim 1, wherein the voltage regulating circuit further comprises at least one diode electrically connected between the first comparing component and the at least one load, The load related voltage is the sum of the voltage drop across the at least one load and the voltage drop of the at least one diode. The power supply device of claim 1, wherein the converter comprises a first winding, a second winding, and at least one rectifying diode, wherein the first winding is electrically connected to the at least one first switching element Connected to and coupled to the second winding, the at least one rectifier diode is electrically connected to the second winding, and the second power source output by the at least one first switching component is applied to the first winding to make the second winding A third power source is generated, and the at least one rectifier diode rectifies the third power source to output the driving power source. The power supply device of claim 1, wherein the control unit is a pulse width modulation (PWM) controller, and the at least one first switching element is a metal-oxide layer-semiconductor field effect transistor. The converter is an LLC series resonant converter. The power supply of claim 1, wherein the at least one load is a light emitting diode. A developing device receives an image data, including: An imaging module includes at least one load, the imaging module projects an image according to the image data; a driving circuit drives the at least one load according to a driving power source; and a power supply device, the power supply can be to the at least one load, The circuit includes a control circuit, a control unit, at least one first switching component, and a converter. The control unit is coupled to the at least one first switching component to control the at least one first switching component. Turning on and off, the at least one first switching component receives a first power source and outputs a second power source, the converter receives the second power source and outputs the driving power source, the voltage regulating circuit includes a first comparing component and a a triggering unit, the triggering unit includes a second switching element and a coupler, the second switching element is coupled to the coupler, and the triggering unit is coupled to the first comparing element by the second switching element and the coupler respectively And the control unit, the first comparison component is coupled to the converter and the at least one load to receive one of driving powers associated with the driving power source a correlation voltage and a load-related voltage associated with the at least one load, the first comparison component comparing the drive power-related voltage and the load-related voltage and controlling, according to the comparison result, whether the trigger unit triggers the control unit to control the at least one The switching element is turned on and off to adjust the driving power. The developing device of claim 15, wherein the at least one first switching element has a duty cycle, and the first comparison component determines that the driving power source related voltage is greater than the load related voltage, the first comparison The component enables the trigger unit to trigger the control unit to reduce the duty cycle of the at least one first switching element. The imaging device of claim 16, wherein when the trigger unit is enabled, the control unit is triggered to turn off the at least one first switching element. The developing device of claim 15, wherein the first comparing component disables the triggering unit when the first comparing component determines that the driving power source related voltage is less than or equal to the load related voltage. The developing device of claim 15, wherein the at least one first switching element has a duty cycle, the coupler is an optical coupler, and the optical coupler comprises one of the second switching elements electrically connected a light emitting diode and an optical crystal electrically connected to the control unit. When the trigger unit is enabled, the second switching element is turned on, and the light emitting diode emits light to the photoelectric crystal to trigger the control unit to reduce the at least one The duty cycle of the first switching element. The imaging device of claim 19, wherein when the trigger unit is enabled, the control unit is triggered to turn off the at least one first switching element. The display device of claim 15, wherein the voltage adjustment circuit further comprises a second comparison component, wherein the two input ends of the second comparison component are respectively coupled to the two ends of the at least one load to output the The load related voltage is applied to the first comparison element. The imaging device of claim 21, wherein the first comparison component and the second comparison component are each an operational amplifier, and the second switching component is a transistor. The imaging device of claim 15, wherein the voltage regulating circuit further comprises at least one diode and at least one resistor, the at least one diode being electrically connected to Between the converter and the at least one resistor, the at least one resistor is electrically connected to the first comparison component, and the driving power supply related voltage is a difference between the driving power source and the at least one diode voltage drop and then the at least one resistor Produced after partial pressure. The display device of claim 15, wherein the voltage regulating circuit further comprises at least one resistor electrically connected between the first comparing component and the converter, the driving power supply related voltage is The driving power source is generated by dividing the at least one resistor. The display device of claim 15 , wherein the voltage regulating circuit further comprises at least one diode electrically connected between the first comparing component and the at least one load, The load related voltage is the sum of the voltage drop across the at least one load and the voltage drop of the at least one diode. The developing device of claim 15, wherein the converter comprises a first winding, a second winding and at least one rectifying diode, wherein the first winding is electrically connected to the at least one first switching element Connected to and coupled to the second winding, the at least one rectifier diode is electrically connected to the second winding, and the second power source output by the at least one first switching component is applied to the first winding to make the second winding A third power source is generated, and the at least one rectifier diode rectifies the third power source to output the driving power source. The imaging device of claim 15, wherein the control unit is a pulse width modulation (PWM) controller, and the at least one first switching element is a metal-oxide layer-semiconductor field effect transistor. The converter is an LLC series resonant converter. The imaging device of claim 15, wherein the imaging module further comprises at least one dimming component and a projection lens, the driving circuit driving the at least one negative A light is emitted, and the light is processed by the at least one dimming element and the projection lens to project the image. The imaging device of claim 28, wherein the at least one dimming element is any combination of a liquid crystal panel, a single crystal germanium liquid crystal display panel, and a digital microchip device. The imaging device of claim 15, wherein the at least one load is any combination of a light emitting diode, an organic light emitting diode, and a laser diode.