Pulse xenon lamp power supply and light-emitting device

Abstract

The embodiment of the utility model provides a pulse xenon lamp power supply and a light-emitting device. The pulse xenon lamp power supply comprises an energy storage unit, a discharge unit, a high-voltage isolation switch, a pulse xenon lamp pre-combustion unit and a control unit, wherein the control unit is connected with the discharge unit and the pulse xenon lamp pre-combustion unit; a pulse xenon lamp is connected between the pulse xenon lamp pre-combustion unit and the high-voltage isolation switch; the discharge unit comprises an IGBT switch; the energy storage unit stores electric energy; if the control unit receives the starting signal of the pulse xenon lamp, a pre-combustion high-voltage signal of the pulse xenon lamp pre-combustion unit is generated; the pulse xenon lamp pre-combustion unit responds to the pre-combustion high-voltage signal and releases a high-voltage pulse for puncturing the pulse xenon lamp, and the high-voltage pulse pre-combusts the pulse xenon lamp to be started so that the high-voltage isolation switch can be switched on; the control unit also receives a pulse adjustment signal corresponding to the IGBT switch and outputs an adjusted quasi square wave signal; and the discharge unit conducts the energy storage unit and the pulse xenon lamp to be started based on the quasi square wave signal. According to the technology, the discharge pulse width of the pulse xenon lamp power supply can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of pulse xenon lamps, in particular to a pulse xenon lamp power supply and a light-emitting device. Background Art

[0002] The pulse xenon lamp power supply is a pulse discharge power supply with a pulse xenon lamp as a load. At present, the existing pulse xenon lamp power supply is composed of a pulse xenon lamp pre-ignition unit and a discharge unit. Among them, the discharge unit includes a thyristor as a discharge switch.

[0003] At present, the output mode of the existing pulse xenon lamp power supply is to connect the CBB energy storage capacitor in series with the inductor and then discharge the pulse xenon lamp through the thyristor. The discharge waveform is bell-shaped and the effective width of the discharge waveform is fixed. Therefore, it is not convenient to adjust the effective width of the discharge pulse output by the pulse xenon lamp power supply. Utility Model Content

[0004] The utility model aims to provide a pulse xenon lamp power supply and a light-emitting device to alleviate the technical problem that the effective width of the discharge pulse output by the existing pulse xenon lamp power supply is inconvenient to adjust, so that the discharge pulse output by the pulse xenon lamp power supply is easy to adjust.

[0005] The utility model provides a pulse xenon lamp power supply, comprising: an energy storage unit, a discharge unit, a high-voltage isolating switch and a pulse xenon lamp pre-ignition unit connected in sequence, and also comprising a control unit connected to the discharge unit and the pulse xenon lamp pre-ignition unit; an external pulse xenon lamp to be started is connected between the pulse xenon lamp pre-ignition unit and the high-voltage isolating switch; the discharge unit comprises: an IGBT switch; the energy storage unit is used to store electric energy; the control unit is used to generate a pre-ignition high-voltage signal of the pulse xenon lamp pre-ignition unit if a start signal of the pulse xenon lamp to be started is received; the pulse xenon lamp pre-ignition unit is used to respond to the pre-ignition high-voltage signal and release a high-voltage pulse that breaks down the pulse xenon lamp to be started, so as to pre-ignite the pulse xenon lamp to be started through the high-voltage pulse and turn on the high-voltage isolating switch; the control unit is also used to receive a pulse adjustment signal corresponding to the IGBT switch and output an adjusted quasi-square wave signal; the discharge unit is also used to turn on the energy storage unit and the pulse xenon lamp to be started based on the quasi-square wave signal, and discharge the pulse xenon lamp to be started by providing electric energy through the energy storage unit.

[0006] In a preferred embodiment of the present invention, the pulse xenon lamp power supply further includes: a charging unit connected to both the energy storage unit and the control unit; the charging unit is used to charge the energy storage unit.

[0007] In a preferred embodiment of the present invention, the energy storage unit is a large-capacity electrolytic capacitor.

[0008] In a preferred embodiment of the present invention, the above-mentioned discharge unit also includes: a first diode connected to the above-mentioned IGBT switch; the emitter of the above-mentioned IGBT switch is connected to the anode of the above-mentioned first diode; the cathode of the above-mentioned first diode is connected to the above-mentioned pulse xenon lamp pre-ignition unit through the above-mentioned high-voltage isolation switch.

[0009] In a preferred embodiment of the present invention, the discharge unit further comprises: a second diode connected to the emitter of the IGBT switch; a cathode of the second diode connected to the emitter of the IGBT switch; and an anode of the second diode connected to the ground.

[0010] In a preferred embodiment of the present invention, the pulse xenon lamp to be started is connected to the ground.

[0011] In a preferred embodiment of the present invention, the energy storage unit is connected to the ground.

[0012] In a preferred embodiment of the present invention, the control unit includes: a controller; the type of the controller is: a single chip microcomputer.

[0013] In a preferred embodiment of the present invention, the IGBT switch is a high-power IGBT switch.

[0014] In a second aspect, an embodiment of the utility model further provides a light-emitting device, comprising: the above-mentioned pulse xenon lamp power supply, and also comprising a pulse xenon lamp body connected to the above-mentioned pulse xenon lamp power supply.

[0015] The embodiments of the present invention have the following beneficial technical effects:

[0016] A pulse xenon lamp power supply and light-emitting device provided by an embodiment of the utility model comprises: an energy storage unit, a discharge unit, a high-voltage isolating switch and a pulse xenon lamp pre-ignition unit connected in sequence, and also comprises a control unit connected to the discharge unit and the pulse xenon lamp pre-ignition unit; an external pulse xenon lamp to be started is connected between the pulse xenon lamp pre-ignition unit and the high-voltage isolating switch; the discharge unit comprises: an IGBT switch; the energy storage unit is used to store electric energy; the control unit is used to generate a pre-ignition high-voltage signal of the pulse xenon lamp pre-ignition unit if a start signal of the pulse xenon lamp to be started is received; the pulse xenon lamp pre-ignition unit is used to respond to the pre-ignition high-voltage signal and release a high-voltage pulse that breaks down the pulse xenon lamp to be started, so as to pre-ignite the pulse xenon lamp to be started through the high-voltage pulse and turn on the high-voltage isolating switch; the control unit is also used to receive a pulse adjustment signal corresponding to the IGBT switch and output an adjusted quasi-square wave signal; the discharge unit is also used to turn on the energy storage unit and the pulse xenon lamp to be started based on the quasi-square wave signal, and discharge the pulse xenon lamp to be started by providing electric energy through the energy storage unit. This technology replaces the thyristor switch in the traditional pulse power supply with an IGBT switch, thereby making the discharge pulse width of the pulse xenon lamp power supply adjustable.

[0017] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures specifically pointed out in the description, claims and drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a conventional pulse xenon lamp power supply provided in an embodiment of the utility model;

[0021] Figure 2 A discharge waveform diagram of a conventional pulse xenon lamp power supply provided in an embodiment of the utility model;

[0022] Figure 3A schematic diagram of the structure of a pulse xenon lamp power supply provided in an embodiment of the utility model;

[0023] Figure 4 A pulse xenon lamp power supply discharge waveform diagram provided by the embodiment of the utility model;

[0024] Figure 5 A schematic structural diagram of a light emitting device provided in an embodiment of the utility model.

[0025] Icons: 01-discharge unit of traditional pulse xenon lamp power supply; 02-energy storage unit of traditional pulse xenon lamp power supply; 03-pulse xenon lamp to be started; 04-thyristor switch; 30-control unit; 31-energy storage unit; 32-discharge unit; 33-high-voltage isolating switch; 34-pulse xenon lamp pre-ignition unit; 35-IGBT switch; 36-charging unit; 37-first diode; 38-second diode; 50-pulse xenon lamp power supply; 51-pulse xenon lamp body. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] The output mode of the existing pulse xenon lamp power supply is that the CBB energy storage capacitor is connected in series with the inductor and then discharges the pulse xenon lamp through the thyristor. The discharge waveform is bell-shaped and the effective width of the discharge waveform is fixed. Therefore, it is not convenient to adjust the effective width of the discharge pulse output by the pulse xenon lamp power supply.

[0028] here, Figure 1 A schematic diagram of the structure of a traditional pulse xenon lamp power supply provided in an embodiment of the utility model.

[0029] Depend on Figure 1 As can be seen, the discharge unit 01 of the conventional pulse xenon lamp power supply includes a thyristor switch 04; the energy storage unit 02 of the conventional pulse xenon lamp power supply is a CBB energy storage capacitor. Its power output mode is that the CBB energy storage capacitor is connected in series with the inductor to discharge the pulse xenon lamp 03 to be started through the thyristor switch 04.

[0030] Furthermore, Figure 2 A discharge waveform diagram of a traditional pulse xenon lamp power supply provided in an embodiment of the utility model.

[0031] Depend on Figure 2It can be seen that the discharge waveform of the conventional pulse xenon lamp power supply is a bell-shaped wave, and the effective pulse width of the bell-shaped wave is fixed.

[0032] Furthermore, the traditional pulse xenon lamp power supply has the following technical disadvantages:

[0033] First, if the effective width of the discharge pulse needs to be changed, the discharge circuit parameters need to be changed.

[0034] Secondly, the inductance of the discharge circuit plays the role of current limiting and widening the effective width of the discharge pulse, which is a necessary condition to meet the technical requirements of the peripheral laser. If this inductance exists, the rising and falling edges of the above-mentioned bell-shaped wave will become slow.

[0035] From the above content, it can be seen that the effective width of the discharge pulse output by the traditional pulse xenon lamp power supply is determined by the discharge circuit parameters and is not convenient to adjust arbitrarily; if the above traditional pulse xenon lamp power supply is used for Q-switched laser, it is necessary to obtain the maximum pump energy within the duration of the "high-energy-level particles". The energy distribution of the above bell-shaped wave is affected by the capacity and inductance of the energy storage capacitor. For Q-switched lasers, the optimal opening time of the Q switch is uncertain and requires careful adjustment, which increases the difficulty of laser technology; for solid-state lasers, the thermal effect of the system optical components is a key factor affecting the efficient operation of the laser Ineffective pump energy not only reduces the pump efficiency of the pulse xenon lamp power supply, but the system thermal effect caused by the ineffective pump energy has a much greater impact on the laser performance than the former. The discharge switch of the traditional pulse xenon lamp power supply is a thyristor switch. The tail current of the bell wave prolongs the recovery and shutdown time of the thyristor. It is necessary to wait until the thyristor is restored and shut down before charging for the next discharge pulse. The waiting time is 3 to 5ms. If the discharge frequency is 100Hz, the waiting time for recovery and shutdown is 300 to 500ms, which is equivalent to a 30% to 50% reduction in the output capacity of the pulse xenon lamp power supply.

[0036] Based on this, the embodiment of the utility model provides a pulse xenon lamp power supply and a light-emitting device. The technology replaces the thyristor switch in the traditional pulse power supply with an IGBT switch, so that the discharge pulse width of the pulse xenon lamp power supply is adjustable. To facilitate the understanding of the embodiment of the utility model, a pulse xenon lamp power supply disclosed in the embodiment of the utility model is first introduced in detail.

[0037] Example 1

[0038] Figure 3 A schematic diagram of the structure of a pulse xenon lamp power supply provided in an embodiment of the utility model.

[0039] Depend on Figure 3As can be seen, the pulse xenon lamp power supply includes: an energy storage unit 31, a discharge unit 32, a high-voltage isolating switch 33 and a pulse xenon lamp pre-ignition unit 34 connected in sequence, and also includes a control unit 30 connected to the above-mentioned discharge unit 32 and the above-mentioned pulse xenon lamp pre-ignition unit 34; an external pulse xenon lamp 03 to be started is connected between the above-mentioned pulse xenon lamp pre-ignition unit 34 and the above-mentioned high-voltage isolating switch 33; the above-mentioned discharge unit 32 includes: an IGBT switch 35; the above-mentioned energy storage unit 31 is used to store electric energy; the above-mentioned control unit 30 is used to generate the above-mentioned pulse xenon lamp pre-ignition unit 34 if a start signal of the above-mentioned pulse xenon lamp to be started is received. The pulse xenon lamp pre-ignition unit 34 is used to respond to the pre-ignition high-voltage signal, release a high-voltage pulse that breaks down the pulse xenon lamp 03 to be started, so as to pre-ignite the pulse xenon lamp 03 to be started through the high-voltage pulse, and turn on the high-voltage isolation switch 33; the control unit 30 is also used to receive the pulse adjustment signal corresponding to the IGBT switch 35, and output the adjusted quasi-square wave signal; the discharge unit 32 is also used to turn on the energy storage unit 31 and the pulse xenon lamp 03 to be started based on the quasi-square wave signal, and discharge the pulse xenon lamp 03 to be started by providing electrical energy through the energy storage unit 31.

[0040] Furthermore, the pulse xenon lamp power supply further includes: a charging unit 36 ​​connected to both the energy storage unit 31 and the control unit 30 ; the charging unit 36 ​​is used to charge the energy storage unit 31 .

[0041] Furthermore, the energy storage unit 31 is a large-capacity electrolytic capacitor.

[0042] In one embodiment, the discharge unit 32 further includes: a first diode 37 connected to the IGBT switch 35; the emitter of the IGBT switch 35 is connected to the anode of the first diode 37; the cathode of the first diode 37 is connected to the pulse xenon lamp pre-ignition unit 34 via the high-voltage isolating switch 33.

[0043] Furthermore, the discharge unit 32 further includes: a second diode 38 connected to the emitter of the IGBT switch 35; a cathode of the second diode 38 connected to the emitter of the IGBT switch; and an anode of the second diode 38 connected to the ground.

[0044] Furthermore, the pulse xenon lamp 03 to be started is connected to the ground.

[0045] Furthermore, the energy storage unit 31 is connected to the ground.

[0046] In actual operation, the control unit 30 includes: a controller; the type of the controller is: a single chip microcomputer.

[0047] Furthermore, the above-mentioned IGBT switch is a high-power IGBT switch.

[0048] For ease of understanding, Figure 4 A discharge waveform diagram of a pulse xenon lamp power supply provided in an embodiment of the utility model.

[0049] Depend on Figure 4 It can be seen that, compared with the pulse xenon lamp power supply using thyristor as the discharge switch, using IGBT as the discharge switch can minimize the adverse effects of the invalid pump energy of the bell wave on the laser.

[0050] Furthermore, the output of quasi-square wave discharge pulses is achieved, the existence of invalid pump energy is basically avoided, the pump efficiency of the pulse xenon lamp power supply is improved, and the adverse effects of the thermal effect caused by the invalid pump energy on the laser are minimized.

[0051] Furthermore, if the above-mentioned pulse xenon lamp power supply in the present application is applied to a Q-switched laser, the Q-switching time of the Q-switched laser will become unique and controllable without the need for adjustment.

[0052] Furthermore, the discharge pulse width output by the pulse xenon lamp power supply in the present application can be adjusted arbitrarily to meet the needs of adjusting output modes such as pulses and pulse trains.

[0053] A pulse xenon lamp power supply provided by an embodiment of the utility model comprises: an energy storage unit, a discharge unit, a high-voltage isolating switch and a pulse xenon lamp pre-ignition unit connected in sequence, and also comprises a control unit connected to the above-mentioned discharge unit and the above-mentioned pulse xenon lamp pre-ignition unit; an external pulse xenon lamp to be started is connected between the above-mentioned pulse xenon lamp pre-ignition unit and the above-mentioned high-voltage isolating switch; the above-mentioned discharge unit comprises: an IGBT switch; the above-mentioned energy storage unit is used to store electric energy; the above-mentioned control unit is used to generate a pre-ignition high-voltage signal of the above-mentioned pulse xenon lamp pre-ignition unit if a start signal of the above-mentioned pulse xenon lamp to be started is received; the above-mentioned pulse xenon lamp pre-ignition unit is used to respond to the above-mentioned pre-ignition high-voltage signal, release a high-voltage pulse that breaks down the above-mentioned pulse xenon lamp to be started, so as to pre-ignite the above-mentioned pulse xenon lamp to be started through the above-mentioned high-voltage pulse, and turn on the above-mentioned high-voltage isolating switch; the above-mentioned control unit is also used to receive a pulse adjustment signal corresponding to the above-mentioned IGBT switch, and output an adjusted quasi-square wave signal; the above-mentioned discharge unit is also used to turn on the above-mentioned energy storage unit and the above-mentioned pulse xenon lamp to be started based on the above-mentioned quasi-square wave signal, and discharge the above-mentioned pulse xenon lamp to be started by providing electric energy through the above-mentioned energy storage unit. This technology replaces the thyristor switch in the traditional pulse power supply with an IGBT switch, thereby making the discharge pulse width of the pulse xenon lamp power supply adjustable.

[0054] Example 2

[0055] Based on the above embodiments, Figure 5A schematic structural diagram of a light emitting device provided in an embodiment of the utility model.

[0056] Depend on Figure 5 As can be seen, the light emitting device includes: the pulse xenon lamp power supply 50 in the above embodiment, and also includes a pulse xenon lamp body 51 connected to the pulse xenon lamp power supply.

[0057] The light-emitting device provided in this embodiment has the same technical features as the pulse xenon lamp power supply provided in the above-mentioned embodiment 1, so it can also solve the same technical problems and achieve the same technical effects. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the light-emitting device described above can refer to the corresponding structure of the pulse xenon lamp power supply in the above-mentioned embodiment 1, and will not be repeated here.

[0058] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0059] In the description of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Finally, it should be explained that the above embodiments are only used to illustrate the technical solution of the present utility model, not to limit it; although the present utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with 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 utility model.

Claims

1. A pulse xenon lamp power supply, characterized in that: include: An energy storage unit, a discharge unit, a high-voltage isolating switch and a pulse xenon lamp pre-combustion unit connected in sequence, and also includes a control unit connected to the discharge unit and the pulse xenon lamp pre-combustion unit; An external pulse xenon lamp to be started is connected between the pulse xenon lamp pre-ignition unit and the high-voltage disconnector; The discharge unit comprises: an IGBT switch; The energy storage unit is used to store electrical energy; The control unit is used to generate a pre-ignition high-voltage signal of the pulse xenon lamp pre-ignition unit if receiving a start signal of the pulse xenon lamp to be started; The pulse xenon lamp pre-ignition unit is used to respond to the pre-ignition high-voltage signal, release a high-voltage pulse that breaks through the pulse xenon lamp to be started, so as to pre-ignite the pulse xenon lamp to be started through the high-voltage pulse, and turn on the high-voltage isolation switch; The control unit is also used to receive a pulse adjustment signal corresponding to the IGBT switch and output an adjusted quasi-square wave signal; The discharge unit is further used to connect the energy storage unit and the pulse xenon lamp to be started based on the quasi-square wave signal, and discharge the pulse xenon lamp to be started by providing electric energy through the energy storage unit.

2. The pulse xenon lamp power supply according to claim 1, characterized in that: The pulse xenon lamp power supply further includes: a charging unit connected to both the energy storage unit and the control unit; The charging unit is used to charge the energy storage unit.

3. The pulse xenon lamp power supply according to claim 1, characterized in that: The energy storage unit is a large-capacity electrolytic capacitor.

4. The pulse xenon lamp power supply according to claim 1, characterized in that: The discharge unit further includes: a first diode connected to the IGBT switch; the emitter of the IGBT switch is connected to the anode of the first diode; and the cathode of the first diode is connected to the pulse xenon lamp pre-ignition unit through the high-voltage isolation switch.

5. The pulse xenon lamp power supply according to claim 4, characterized in that: The discharge unit further includes: a second diode connected to the emitter of the IGBT switch; The cathode of the second diode is connected to the emitter of the IGBT switch; An anode of the second diode is connected to the ground.

6. The pulse xenon lamp power supply according to claim 4, characterized in that: The pulse xenon lamp to be started is connected to the ground.

7. The pulse xenon lamp power supply according to claim 1, characterized in that: The energy storage unit is connected to the ground.

8. The pulse xenon lamp power supply according to claim 1, characterized in that: The control unit includes: a controller; the type of the controller is: a single chip microcomputer.

9. The pulse xenon lamp power supply according to claim 1, characterized in that: The IGBT switch is a high-power IGBT switch.

10. A light emitting device, characterized in that: include: The pulse xenon lamp power supply according to any one of claims 1 to 9 further comprises a pulse xenon lamp body connected to the pulse xenon lamp power supply.

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