CN218124966U - Full-bridge drive circuit and lighting device - Google Patents

Abstract

The application relates to a full-bridge driving circuit and a lighting device. The full-bridge driving circuit is applied to a capacitive load and comprises the following components: full-bridge switch inverter circuit, transformer and control circuit. The control circuit is connected with each switch unit in the full-bridge switch inverter circuit, and the control circuit is configured to output a drive signal for controlling each switch unit so as to control the full-bridge switch inverter circuit to periodically generate and output an inverter pulse voltage to the transformer based on a drive voltage provided by a power supply voltage terminal. The first output end of the full-bridge switch inverter circuit and the second output end of the full-bridge switch inverter circuit are simultaneously grounded through the control circuit, electric energy on the capacitive load is released, an inverter pulse voltage gap is provided, the capacitive load is enabled to discharge to work, the working time of the capacitive load can be prolonged, the electric energy is fully utilized, and the working effect of the capacitive load is improved.

Description

Full-bridge drive circuit and lighting device

Technical Field

The application belongs to the technical field of lighting devices, and particularly relates to a full-bridge driving circuit and a lighting device.

Background

An excimer lamp is a light emitting device that emits light by bombarding a rare gas in the excimer lamp with a high-voltage, high-frequency current applied to the excimer lamp. The ultraviolet excimer lamp is the most common, and can realize good optical cleaning and optical modification in the manufacture of semiconductors and liquid crystal screens by using single high-strength ultraviolet rays, and has good treatment effect and high speed.

The traditional excimer lamp is usually driven by a full-bridge switching circuit, and the excimer lamp is driven to work by controlling the full-bridge switching circuit to output pulse voltage, but the utilization rate of electric energy by the existing full-bridge switching circuit is lower, and the brightness of the excimer lamp is lower.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a full-bridge driving circuit and a lighting device, and aims to solve the problems of low electric energy utilization efficiency and low brightness of a traditional excimer lamp.

A first aspect of an embodiment of the present application provides a full-bridge driving circuit, configured to drive a capacitive load, the full-bridge driving circuit including: the first input end of the full-bridge switch inverter circuit is connected with a power supply voltage end, and the second input end of the full-bridge switch inverter circuit is connected with a ground end; a first end of a primary winding of the transformer is connected with a first output end of the full-bridge switch inverter circuit, a second end of the primary winding of the transformer is connected with a second output end of the full-bridge switch inverter circuit, and two ends of a secondary winding of the transformer are respectively used for being connected with two ends of the capacitive load; and the control circuit is connected with each switch unit in the full-bridge switch inverter circuit, and is configured to output a driving signal for controlling each switch unit so as to control the full-bridge switch inverter circuit to periodically generate and output an inversion pulse voltage to the transformer, and the full-bridge switch inverter circuit outputs a gap of the inversion pulse voltage to the transformer, so that the first output end of the full-bridge switch inverter circuit and the second output end of the full-bridge switch inverter circuit are simultaneously grounded, and the capacitive load is discharged.

In one embodiment, the full-bridge switching inverter circuit includes a first switching unit, a second switching unit, a third switching unit and a fourth switching unit; a first conduction end of the first switch unit is connected with the power supply voltage end, and a second conduction end of the first switch unit is connected with the first output end; a first conduction end of the second switch unit is connected with the first output end, and a second conduction end of the second switch unit is connected with the ground end; the first conduction end of the third switching unit is connected with the power supply voltage end, and the second conduction end of the third switching unit is connected with the second output end; and the first conduction end of the fourth switch unit is connected with the second output end, and the second conduction end of the fourth switch unit is connected with the ground end.

In an embodiment, the full-bridge switching inverter circuit further includes a first pull-down resistor, a second pull-down resistor, a third pull-down resistor, and a fourth pull-down resistor; two ends of the first pull-down resistor are respectively connected with the control end of the first switch unit and the second conduction end of the first switch unit; two ends of the second pull-down resistor are respectively connected with the control end of the second switch unit and the second conduction end of the second switch unit; two ends of the third pull-down resistor are respectively connected with the control end of the third switch unit and the second conduction end of the third switch unit; and two ends of the fourth pull-down resistor are respectively connected with the control end of the fourth switch unit and the second conduction end of the fourth switch unit.

In one embodiment, the first switch unit, the second switch unit, the third switch unit and the fourth switch unit are all MOS transistors or IGBT transistors.

In one embodiment, the control circuit is connected to control terminals of the first switch unit, the second switch unit, the third switch unit and the fourth switch unit, respectively, the driving signals include a first driving signal, a second driving signal, a third driving signal and a fourth driving signal, and the first driving signal, the second driving signal, the third driving signal and the fourth driving signal are used to control on and off of the first switch unit, the second switch unit, the third switch unit and the fourth switch unit, respectively; the first driving signal is staggered with the second driving signal in phase, and the third driving signal is staggered with the fourth driving signal in phase.

In one embodiment, the control circuit includes a first voltage matching module and a second voltage matching module, the first voltage matching module is connected to the control terminals of the first switch unit and the second switch unit, respectively, and the second voltage matching module is connected to the third switch unit and the fourth switch unit, respectively; the first voltage matching module is configured to output the first and second driving signals based on first and second PWM signals, respectively, the second voltage matching module is configured to output the third and fourth driving signals based on third and fourth PWM signals, respectively; the first driving signal and the third driving signal are high-voltage signals, and the second driving signal and the fourth driving signal are low-voltage signals.

In one embodiment, the control circuit further includes a first modulation module and a second modulation module, the first modulation module is connected to the first voltage matching module, and the second modulation module is connected to the second voltage matching module; the first modulation module is configured to output the first and second PWM signals phase-interleaved based on a first control signal, and the second modulation module is configured to output the third and fourth PWM signals phase-interleaved based on a second control signal.

In an embodiment, the control circuit further includes a main control module, the main control module is connected to the first modulation module and the second modulation module, respectively, and the main control module is configured to generate and output the first control signal and the second control signal.

A second aspect of embodiments of the present application provides a lighting device comprising a capacitive load and a full-bridge driving circuit as described above.

In one embodiment, the capacitive load comprises an excimer lamp.

Compared with the prior art, the embodiment of the application has the advantages that: the first output end of the full-bridge switch inverter circuit and the second output end of the full-bridge switch inverter circuit are simultaneously grounded through the control circuit, electric energy on the capacitive load is released, an inversion pulse voltage gap is provided, the capacitive load is made to discharge, the working time of the capacitive load can be prolonged, the electric energy is fully utilized, and the working effect of the capacitive load is improved.

Drawings

Fig. 1 is a schematic diagram of a full-bridge driving circuit according to a first embodiment of the present application;

fig. 2 is a schematic circuit diagram of a full-bridge switching inverter circuit according to a first embodiment of the present application;

FIG. 3 is a waveform diagram of a driving signal provided by the first embodiment of the present application;

FIG. 4 is a circuit diagram of a control circuit according to a first embodiment of the present application;

fig. 5 is a schematic view of a lighting device according to a second embodiment of the present application.

The above figures illustrate: 100. a full bridge driving circuit; 110. a full bridge switching inverter circuit; 120. a transformer; 130. a control circuit; 131. a first voltage matching module; 132. a second voltage matching module; 133. a first modulation module; 134. a second modulation module; 135. a main control module; 200. a capacitive load; 210. an excimer lamp; 300. an illumination device.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Fig. 1 shows a schematic diagram of a full-bridge driving circuit provided in a first embodiment of the present application, and for convenience of description, only the parts related to this embodiment are shown, and detailed descriptions are as follows:

a full-bridge driving circuit 100 for driving a capacitive load 200, the full-bridge driving circuit 100 comprising: a full bridge switching inverter circuit 110, a transformer 120 and a control circuit 130.

The first input end of the full-bridge switch inverter circuit 110 is connected to the power supply voltage terminal Vbus, and the second input end of the full-bridge switch inverter circuit 110 is connected to the ground terminal. The first end of the primary winding of the transformer 120 is connected to the first output end of the full-bridge switching inverter circuit 110, the second end of the primary winding of the transformer 120 is connected to the second output end of the full-bridge switching inverter circuit 110, and the two ends of the secondary winding of the transformer 120 are respectively used for being connected to the two ends of the capacitive load 200. The control circuit 130 is connected to each switch unit in the full-bridge switching inverter circuit 110, and the control circuit 130 is configured to output a driving signal for controlling each switch unit to control the full-bridge switching inverter circuit 110 to periodically generate and output an inverted pulse voltage to the transformer 120 based on a driving voltage provided by the power supply voltage terminal Vbus, and to control the first output terminal of the full-bridge switching inverter circuit 110 and the second output terminal of the full-bridge switching inverter circuit 110 to be simultaneously grounded at a gap where the full-bridge switching inverter circuit 110 outputs the inverted pulse voltage to the transformer 120, so as to discharge the capacitive load 200.

In particular, the capacitive load 200 may be an excimer lamp. Since the capacitive load 200 has a capacitance, a certain amount of electric energy still exists in the capacitive load 200 at a gap where the full-bridge switch inverter circuit 110 provides the inverter pulse voltage to the transformer 120, and the capacitive load 200 is discharged to operate by grounding the first output terminal of the full-bridge switch inverter circuit 110 and the second output terminal of the full-bridge switch inverter circuit 110 at the same time, so that the electric energy is fully utilized, and the operating time of the capacitive load 200 is increased. When the capacitive load 200 is an excimer lamp, the intensity of the excimer lamp can be increased. The transformer 120 may boost the inverted pulse voltage, and in one example, the transformer 120 may boost the inverted pulse voltage of 400V to 3000V to 5000V.

As shown in fig. 2, in the present embodiment, the full-bridge switching inverter circuit 110 includes a first switching unit Q1, a second switching unit Q2, a third switching unit Q3, and a fourth switching unit Q4. A first conduction end of the first switch unit Q1 is connected with the power supply voltage end Vbus, and a second conduction end of the first switch unit Q1 is connected with the first output end; a first conduction end of the second switch unit Q2 is connected with the first output end, and a second conduction end of the second switch unit Q2 is connected with the ground end; a first conduction end of the third switching unit Q3 is connected with the power supply voltage end Vbus, and a second conduction end of the third switching unit Q3 is connected with the second output end; a first conduction end of the fourth switching unit Q4 is connected to the second output end, and a second conduction end of the fourth switching unit Q4 is connected to the ground end. The first output terminal of the full-bridge switching inverter circuit 110 and the second output terminal of the full-bridge switching inverter circuit 110 are controlled to be grounded at the same time, that is, the second switching unit Q2 and the fourth switching unit Q4 are controlled to be turned on at the same time.

It should be noted that when the first switching unit Q1 and the fourth switching unit Q4 are turned on, the electric energy provided by the power voltage terminal Vbus is transmitted from the first output terminal to the second output terminal through the primary winding of the transformer 120, and when the second switching unit Q2 and the third switching unit Q3 are turned on, the electric energy provided by the power voltage terminal Vbus is transmitted from the second output terminal to the first output terminal through the primary winding of the transformer 120, so that the inverter pulse voltage is periodically provided to the transformer 120, and the secondary winding of the transformer 120 provides a corresponding driving voltage to the capacitive load 200.

In the interval of outputting the inverted pulse voltage, the conventional circuit usually keeps all the switch units turned off, while the present embodiment discharges the electric energy on the capacitive load 200 by controlling the second switch unit Q2 and the fourth switch unit Q4 to be turned on simultaneously to operate the capacitive load 200, thereby improving the power utilization efficiency of the capacitive load 200.

In this embodiment, each of the first switch unit Q1, the second switch unit Q2, the third switch unit Q3 and the fourth switch unit Q4 may be a Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET) or an Insulated Gate Bipolar Transistor (IGBT). As shown in fig. 2, in an example, the first switching unit Q1, the second switching unit Q2, the third switching unit Q3 and the fourth switching unit Q4 are all NMOS transistors.

As shown in fig. 2, in the present embodiment, the full-bridge switching inverter circuit 110 further includes a first pull-down resistor R1, a second pull-down resistor R2, a third pull-down resistor R3, and a fourth pull-down resistor R4. Two ends of the first pull-down resistor R1 are respectively connected with the control end of the first switch unit Q1 and the second breakover end of the first switch unit Q1; two ends of the second pull-down resistor R2 are respectively connected with the control end of the second switching unit Q2 and the second conducting end of the second switching unit Q2; two ends of the third pull-down resistor R3 are connected to the control end of the third switching unit Q3 and the second conducting end of the third switching unit Q3, respectively; two ends of the fourth pull-down resistor R4 are respectively connected with the control end of the fourth switching unit Q4 and the second conducting end of the fourth switching unit Q4.

The first pull-down resistor R1, the second pull-down resistor R2, the third pull-down resistor R3, and the fourth pull-down resistor R4 are used to rapidly decrease the voltage of the control terminals of the first switching unit Q1, the second switching unit Q2, the third switching unit Q3, and the fourth switching unit Q4.

In this embodiment, the control circuit 130 is connected to the control terminals of the first switch unit Q1, the second switch unit Q2, the third switch unit Q3, and the fourth switch unit Q4, the driving signal includes a first driving signal V1, a second driving signal V2, a third driving signal V3, and a fourth driving signal V4, and the first driving signal V1, the second driving signal V2, the third driving signal V3, and the fourth driving signal V4 are respectively used to control the on/off of the first switch unit Q1, the second switch unit Q2, the third switch unit Q3, and the fourth switch unit Q4. The first driving signal V1 is staggered with respect to the second driving signal V2, and the third driving signal V3 is staggered with respect to the fourth driving signal V4. The phase interleaving means that the two signals have different levels, and when one of the signals is at a high level, the other signal is at a low level. Taking the first driving signal V1 and the second driving signal V2 as an example, when the first driving signal V1 is at a high level, the second driving signal V2 is at a low level; when the first driving signal V1 is at a low level, the second driving signal V2 is at a high level. In one example, the first switching unit Q1, the second switching unit Q2, the third switching unit Q3, and the fourth switching unit Q4 are all turned on at a high level and turned off at a low level.

The waveforms of the first driving signal V1, the second driving signal V2, the third driving signal V3 and the fourth driving signal V4 are as shown in fig. 3, and the driving signals can be sequentially divided into four stages in one period. The first stage is as follows: the driving signal controls the first switching unit Q1 and the fourth switching unit Q4 to be turned on, and controls the second switching unit Q2 and the third switching unit Q3 to be turned off. And a second stage: the driving signal controls the first switching unit Q1 and the third switching unit Q3 to be turned off, and controls the second switching unit Q2 and the fourth switching unit Q4 to be turned on. And a third stage: the driving signal controls the second switching unit Q2 and the third switching unit Q3 to be turned on, and controls the first switching unit Q1 and the fourth switching unit Q4 to be turned off. A fourth stage: the driving signal controls the first switching unit Q1 and the third switching unit Q3 to be turned off, and controls the second switching unit Q2 and the fourth switching unit Q4 to be turned on.

In the first and third stages, the full-bridge switching inverter circuit 110 charges the capacitive load 200 through the transformer 120, and the capacitive load 200 operates. In the second and fourth phases, the first output terminal of the full-bridge switching inverter circuit 110 and the second output terminal of the full-bridge switching inverter circuit 110 are grounded at the same time, and at this time, both ends of the capacitive load 200 are equivalent to a short circuit, and a current flows from the high voltage end of the capacitive load 200 to the low voltage end of the capacitive load 200, and the capacitive load 200 operates.

As shown in fig. 4, in the present embodiment, the control circuit 130 includes a first voltage matching module 131 and a second voltage matching module 132, the first voltage matching module 131 is connected to the control terminals of the first switching unit Q1 and the second switching unit Q2, respectively, and the second voltage matching module 132 is connected to the third switching unit Q3 and the fourth switching unit Q4, respectively. The first voltage matching module 131 is configured to output the first and second driving signals V1 and V2 based on the first and second PWM signals, respectively, and the second voltage matching module 132 is configured to output the third and fourth driving signals V3 and V4 based on the third and fourth PWM signals, respectively. The first drive signal V1 and the third drive signal V3 are high voltage signals, and the second drive signal V2 and the fourth drive signal V4 are low voltage signals.

In this embodiment, the first switching unit Q1 and the third switching unit Q3 are both high voltage driving switches, and because the first switching unit Q1 and the third switching unit Q3 are used to be directly connected to the power supply voltage terminal Vbus, and the first switching unit Q1 and the third switching unit Q3 operate on the high voltage side, in order to avoid the first switching unit Q1 and the third switching unit Q3 from being turned on by mistake, a high voltage signal is required to drive, the second switching unit Q2 and the fourth switching unit Q4 are low voltage driving switches, the first voltage matching module 131 and the second voltage matching module 132 may output the first driving signal V1, the second driving signal V2, the third driving signal V3 and the fourth driving signal V4 with the same waveforms respectively according to the waveforms of the first PWM signal, the second PWM signal, the third PWM signal and the fourth PWM signal, and configure the voltage values of the first driving signal V1, the second driving signal V2, the third driving signal V3 and the fourth driving signal V4 at the same time. The voltage values of the high levels of the first driving signal V1 and the third driving signal V3 may be boosted by a bootstrap boosting manner, so that the driving signals are matched with the corresponding switching units.

In this embodiment, the control circuit 130 further includes a first modulation module 133 and a second modulation module 134, the first modulation module 133 is connected to the first voltage matching module 131, and the second modulation module 134 is connected to the second voltage matching module 132. The first modulation module 133 is configured to output phase-interleaved first and second PWM signals based on the first control signal, and the second modulation module 134 is configured to output phase-interleaved third and fourth PWM signals based on the second control signal.

Since the phases of the first PWM signal and the second PWM signal are staggered, and the phases of the third PWM signal and the fourth PWM signal are staggered, the first modulation module 133 and the second modulation module 134 can output PWM signals of four waveforms based on the first control signal and the second control signal by inverting the phases of the signals, thereby implementing control of on and off of each switching unit.

In this embodiment, the control circuit 130 further includes a main control module 135, the main control module 135 is respectively connected to the first modulation module 133 and the second modulation module 134, and the main control module 135 is configured to generate and output the first control signal and the second control signal.

The present embodiment may generate four driving signals according to two control signals to save pins and computing resources of the main control module 135.

Fig. 5 shows a schematic diagram of a lighting device provided in the first embodiment of the present application, and for convenience of illustration, only the portions related to the present embodiment are shown, which is detailed as follows:

a lighting device 300 comprises a capacitive load 200 and a full-bridge driving circuit 100 as described in any of the above embodiments.

In this embodiment, the capacitive load 200 includes an excimer lamp 210, and the excimer lamp 210 can emit ultraviolet light during operation, and the illumination intensity of the excimer lamp 210 can be increased by driving the excimer lamp 210 to emit light for multiple times.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (10)

1. A full-bridge drive circuit for driving a capacitive load, the full-bridge drive circuit comprising:

the first input end of the full-bridge switching inverter circuit is connected with a power voltage end, and the second input end of the full-bridge switching inverter circuit is connected with the ground end;

a first end of a primary winding of the transformer is connected with a first output end of the full-bridge switch inverter circuit, a second end of the primary winding of the transformer is connected with a second output end of the full-bridge switch inverter circuit, and two ends of a secondary winding of the transformer are respectively used for being connected with two ends of the capacitive load;

control circuit, control circuit with each switch unit among the full-bridge switch inverter circuit connects, control circuit is configured as the output and is used for controlling each switch unit's drive signal, in order to control full-bridge switch inverter circuit periodically generates and to transformer output contravariant pulse voltage, and full-bridge switch inverter circuit to transformer output contravariant pulse voltage's clearance, control full-bridge switch inverter circuit's first output with full-bridge switch inverter circuit's second output simultaneously ground connection, so that capacitive load carries out discharge work.

2. The full-bridge driving circuit according to claim 1, wherein the full-bridge switching inverter circuit comprises a first switching unit, a second switching unit, a third switching unit, and a fourth switching unit;

a first conduction end of the first switch unit is connected with the power supply voltage end, and a second conduction end of the first switch unit is connected with the first output end; a first conduction end of the second switch unit is connected with the first output end, and a second conduction end of the second switch unit is connected with the ground end; the first conduction end of the third switching unit is connected with the power supply voltage end, and the second conduction end of the third switching unit is connected with the second output end; and the first conduction end of the fourth switch unit is connected with the second output end, and the second conduction end of the fourth switch unit is connected with the ground end.

3. The full-bridge driving circuit according to claim 2, wherein the full-bridge switching inverter circuit further comprises a first pull-down resistor, a second pull-down resistor, a third pull-down resistor, and a fourth pull-down resistor;

two ends of the first pull-down resistor are respectively connected with the control end of the first switch unit and the second conduction end of the first switch unit; two ends of the second pull-down resistor are respectively connected with the control end of the second switch unit and the second conduction end of the second switch unit; two ends of the third pull-down resistor are respectively connected with the control end of the third switch unit and the second conduction end of the third switch unit; and two ends of the fourth pull-down resistor are respectively connected with the control end of the fourth switch unit and the second conduction end of the fourth switch unit.

4. The full-bridge driving circuit according to claim 2, wherein the first switch unit, the second switch unit, the third switch unit and the fourth switch unit are all MOS transistors or IGBT transistors.

5. The full-bridge driving circuit according to any one of claims 2 to 4, wherein the control circuit is connected to control terminals of the first switch unit, the second switch unit, the third switch unit and the fourth switch unit respectively, the driving signals include a first driving signal, a second driving signal, a third driving signal and a fourth driving signal, and the first driving signal, the second driving signal, the third driving signal and the fourth driving signal are respectively used for controlling on and off of the first switch unit, the second switch unit, the third switch unit and the fourth switch unit;

the first driving signal is staggered with the second driving signal in phase, and the third driving signal is staggered with the fourth driving signal in phase.

6. The full-bridge driving circuit according to claim 5, wherein the control circuit comprises a first voltage matching module and a second voltage matching module, the first voltage matching module is connected with the control terminals of the first switching unit and the second switching unit, respectively, and the second voltage matching module is connected with the third switching unit and the fourth switching unit, respectively;

the first voltage matching module is configured to output the first driving signal and the second driving signal based on a first PWM signal and a second PWM signal, respectively, and the second voltage matching module is configured to output the third driving signal and the fourth driving signal based on a third PWM signal and a fourth PWM signal, respectively;

the first driving signal and the third driving signal are high-voltage signals, and the second driving signal and the fourth driving signal are low-voltage signals.

7. The full-bridge driving circuit according to claim 6, wherein the control circuit further comprises a first modulation module and a second modulation module, the first modulation module is connected with the first voltage matching module, and the second modulation module is connected with the second voltage matching module;

the first modulation module is configured to output the first and second PWM signals phase-interleaved based on a first control signal, and the second modulation module is configured to output the third and fourth PWM signals phase-interleaved based on a second control signal.

8. The full-bridge driving circuit of claim 7, wherein the control circuit further comprises a master control module connected to the first modulation module and the second modulation module, respectively, the master control module configured to generate and output the first control signal and the second control signal.

9. A lighting device comprising a capacitive load and a full bridge driver circuit as claimed in any one of claims 1 to 8.

10. The lighting device of claim 9, wherein the capacitive load comprises an excimer lamp.

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