CN114069375A - Addressable laser driving circuit and addressable laser instrument - Google Patents
Addressable laser driving circuit and addressable laser instrument Download PDFInfo
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- CN114069375A CN114069375A CN202111331093.2A CN202111331093A CN114069375A CN 114069375 A CN114069375 A CN 114069375A CN 202111331093 A CN202111331093 A CN 202111331093A CN 114069375 A CN114069375 A CN 114069375A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
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Abstract
The embodiment of the invention discloses an addressable laser driving circuit and an addressable laser instrument. The addressable laser driving circuit comprises a control module, an addressing module, a driving signal input module, a plurality of driving modules and a plurality of current testing modules; the driving signal input module is connected with the control module, the driving signal input module is connected with the addressing module, the addressing module is provided with a plurality of output ends, each output end is connected with one driving module to form a channel, and each driving module is connected with one current testing module; according to the scheme, the control module generates the addressing signal and transmits the addressing signal to the addressing module through the driving signal input module, so that the addressing module conducts the conduction channel corresponding to the address in the addressing signal, the driving module corresponding to the conduction channel receives the driving signal, and the driving module starts the laser connected with the driving module. Meanwhile, the current testing module can also acquire the driving current generated by the driving module, so that the driving performance of the driving module can be accurately obtained.
Description
Technical Field
The embodiment of the invention relates to the technical field of circuit design, in particular to an addressable laser driving circuit and an addressable laser instrument.
Background
As a common light generating device, a laser is widely used due to its characteristics of small size, good high-frequency response, high modulation efficiency, convenience in tuning, and the like. With the application of lasers, the demand on the driving capability of a laser driving circuit is higher and higher, but the current laser driving circuit cannot directly detect the driving capability of the laser driving circuit.
Disclosure of Invention
The embodiment of the invention provides an addressable laser driving circuit and an addressable laser instrument, so that the driving capability of the addressable laser driving circuit can be detected according to the driving current of the addressable laser driving circuit.
In a first aspect, an embodiment of the present invention provides an addressable laser driving circuit, which includes a control module, a driving signal input module, an addressing module, a plurality of driving modules, and a plurality of current testing modules;
the driving signal input module is connected with the control module, the driving signal input module is connected with the addressing module, the addressing module is provided with a plurality of output ends, each output end is connected with one driving module to form a channel, and each driving module is connected with one current testing module; the control module is used for providing addressing signals for the addressing module through the driving signal input module, the channels correspond to addresses in the addressing signals one by one, and the addressing module is used for conducting the channels corresponding to the addresses according to the addressing signals; the driving signal input module is used for providing a driving signal for the addressing module, and the driving module is used for starting the laser according to the driving signal and forming a driving current; the current testing module is used for detecting the driving performance of the driving module according to the driving current.
Optionally, the addressable laser driver circuit comprises an external signal input module;
the external signal input module is connected with the driving signal input module; the external signal input module is used for providing a first driving signal; the control module is further used for providing a second driving signal, and the driving signal input module is used for forming a driving signal according to the first driving signal or the second driving signal.
Optionally, the driving signal input module includes an interface unit;
the first input end of the interface unit is connected with the control module, the second input end of the interface unit is connected with the external signal input module, and the first output end of the interface unit is connected with the addressing module; the control module is used for transmitting the addressing signal to the addressing module through the interface unit, and the interface unit is used for transmitting the driving signal to the addressing module.
Optionally, the driving signal input module further comprises an input selection unit;
the second output end of the interface unit is connected with the first end of the input selection unit, and the second end of the input selection unit is connected with the addressing module; the input selection unit is used for forming a driving signal by the first driving signal or the second driving signal and transmitting the driving signal to the addressing module.
Optionally, the addressable laser driving circuit further comprises a power supply module;
the third input end of the interface unit is connected with an external high-voltage power supply, the third output end of the interface unit is connected with a power supply module, and the power supply module is respectively connected with the control module, the addressing module and the driving module; the power module is used for supplying power to the control module, the addressing module and the driving module.
Optionally, the power supply module comprises a dc/dc conversion module;
the direct current/direct current conversion module is used for converting a high-voltage power supply signal generated by an external high-voltage power supply into a low-voltage power supply signal.
Optionally, the driving module includes a driving chip, a voltage stabilizing unit, a current limiting unit, and a charging and discharging unit;
the input end of the driving chip is connected with the addressing module, the output end of the driving chip is connected with the first end of the laser, the first end of the voltage stabilizing unit is connected with the power module, the second end of the voltage stabilizing unit is connected with the first end of the current limiting unit, the second end of the current limiting unit is connected with the first end of the charge and discharge unit, the second end of the laser and the current testing module, and the second end of the charge and discharge unit is grounded;
the driving chip is used for starting the laser; the voltage stabilizing unit is used for maintaining the stability of a high-voltage power supply signal transmitted by the power supply module; the current limiting unit is used for reducing the input current of the charging and discharging unit; the charging and discharging unit is used for providing power for the laser.
Optionally, the driver chip is model EPC 21601.
Optionally, the current testing module includes a detection unit and a detection interface;
the first end of the detection unit is connected with the driving module, the second end of the detection unit is connected with the first end of the detection interface, and the second end of the detection interface is connected with external detection equipment; the detection unit is used for acquiring the driving current generated by the driving module and transmitting the driving current to external detection equipment through the detection interface.
In a second aspect, an embodiment of the present invention further provides an addressable laser apparatus, which includes the addressable laser driving circuit and the laser in any one of the foregoing embodiments;
the addressable laser driving circuit is connected with the laser, and the addressable laser driving circuit is used for starting the laser.
According to the embodiment of the invention, the control module generates the addressing signal and transmits the addressing signal to the addressing module through the driving signal input module, so that the addressing module conducts the conducting channel corresponding to the address in the addressing signal, and the driving module corresponding to the conducting channel receives the driving signal transmitted by the driving signal input module, so that the driving module starts the laser connected with the driving module. Meanwhile, the current testing module can also acquire the driving current generated by the driving module, so that the driving performance of the driving module can be accurately obtained.
Drawings
To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description, although being some specific embodiments of the present invention, can be extended and extended to other structures and drawings by those skilled in the art according to the basic concepts of the device structure, the driving method and the manufacturing method disclosed and suggested by the various embodiments of the present invention, without making sure that these should be within the scope of the claims of the present invention.
Fig. 1 is a schematic structural diagram of an addressable laser driving circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a connection between an addressing module and a driving module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another addressable laser driving circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another addressable laser driving circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another addressable laser driving circuit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a dial selection switch according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another addressable laser driving circuit according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a power module according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a driving module according to an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a current testing module according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an addressable laser provided in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides an addressable laser driving circuit, and fig. 1 is a schematic structural diagram of the addressable laser driving circuit provided in the embodiment of the present invention. As shown in fig. 1, it includes a control module 110, a driving signal input module 120, an addressing module 130, a plurality of driving modules 140, and a plurality of current testing modules 150; the driving signal input module 120 is connected with the control module 110, the driving signal input module 120 is connected with the addressing module 130, the addressing module 130 has a plurality of output ends, each output end is connected with one driving module 140 to form a channel, and each driving module 140 is connected with one current testing module 150; the control module 110 is configured to provide an addressing signal to the addressing module 130 through the driving signal input module 120, where the channels correspond to addresses in the addressing signal one to one, and the addressing module 130 is configured to turn on the channels corresponding to the addresses according to the addressing signal; the driving signal input module 120 is configured to provide a driving signal for the addressing module 130, and the driving module 140 is configured to start the laser according to the driving signal and form a driving current; the current test module 150 is used for detecting the driving performance of the driving module 140 according to the driving current.
The addressable laser driver circuit is composed of a control module 110, a driving signal input module 120, an addressing module 130, a plurality of driving modules 140, and a plurality of current testing modules 150. The control module 110 is the general control center of the whole circuit and can generate not only addressing signals with addresses but also driving signals. The driving signal input module 120 has a plurality of information transmission channels, and different information received by the driving signal input module 120 can be transmitted to a specific module or device through different information transmission channels. The addressing module 130 has a driving signal input terminal, at least one addressing signal input terminal, and at least two output terminals, each output terminal is connected to the driving module 140 to form a channel, and the addressing signal input terminal of the addressing module 130 can gate the driving signal input terminal of the addressing module 130 to be conducted with a different output terminal according to an address in the addressing signal, so that the different output terminals of the addressing module 130 can be selected according to the address to output the driving signal. The driver module 140 is an implementation of the overall circuit, and is capable of activating the laser. The current testing module 150 is used for obtaining the driving current generated by the driving module 140 so as to detect the driving performance of the driving module 140.
Specifically, the driving signal input module 120 is connected to the control module 110, the driving signal input module 120 is connected to the addressing module 130, the addressing module 130 has a plurality of output terminals, each output terminal is connected to one driving module 140 to form a channel, and each driving module 140 is connected to one current testing module 150. Therefore, the addressing signal generated by the control module 110 may provide the addressing signal to the addressing module 130 through the driving signal input module 120, and after receiving the addressing signal, the addressing module 130 correspondingly turns on the channel formed by the addressing module 130 and the driving module 140 according to the address in the addressing signal. The driving signal generated by the control module 110 is transmitted to the driving module 140 through the channel through which the driving signal input module and the addressing module 130 are conducted with the driving module 140, so that the driving module 140 starts the laser according to the driving signal and forms a driving current. The larger the driving current generated by the driving module 140 is, the stronger the driving capability of the driving module 140 is. The current test module 150 connected to the driving module 140 may collect the driving current generated by the driving module 140, so that the driving performance of the driving module 140 may be easily detected by the magnitude of the driving current.
According to the embodiment of the invention, the control module generates the addressing signal and transmits the addressing signal to the addressing module through the driving signal input module, so that the addressing module conducts the conducting channel corresponding to the address in the addressing signal, and the driving module corresponding to the conducting channel receives the driving signal transmitted by the driving signal input module, so that the driving module starts the laser connected with the driving module. Meanwhile, the current testing module can also acquire the driving current generated by the driving module, so that the driving performance of the driving module can be accurately obtained.
Alternatively, the addressing module may be an analog switch chip of 74HCT4067BQ type, which can be connected to 16 driving modules at most. Fig. 2 is a schematic structural diagram illustrating connection between an addressing module and a driving module according to an embodiment of the present invention. As shown in fig. 2, 12 output terminals of the addressing module 130 are respectively connected to a driving module, that is, the output terminal B1 of the control module is connected to the driving module 1401 to form a channel 0, the output terminal B2 of the control module is connected to the driving module 1402 to form a channel 1, the output terminal B3 of the control module is connected to the driving module 1403 to form a channel 2, and so on, the output terminals B4-B12 of the driving module respectively form channels 3-11 with the driving modules 1404-1412. The input port a1, the input port a2, the input port A3, and the input port a4 of the addressing module 130 are ports that receive addressing signals. The input port IN of the control module is a port that receives the driving signal transmitted by the driving signal input module. If the addressing signals inputted from the input port a1, the input port a2, the input port A3 and the input port a4 of the addressing module 130 are 0000, the output port B1 of the control module is connected to the driving module 1401 to form a channel 0, and the driving signal received from the input port IN of the control module is transmitted to the driving module 1401 through the channel 0. If the addressing signals input by the input port a1, the input port a2, the input port A3, and the input port a4 of the addressing module 130 are 0001, the output port B2 of the control module is connected to the driving module 1402 to form a channel 1, and the driving signal received by the input port IN of the control module is transmitted to the driving module 1402 through the channel 1. By analogy, the addressing signals 0010-. Therefore, the control module can transmit a driving signal to the driving module corresponding to the conducting channel through the addressing module 130, so that the driving module can start the laser and generate a driving current, and the current testing module can conveniently detect the driving performance of the driving module.
Fig. 3 is a schematic structural diagram of another addressable laser driver circuit according to an embodiment of the present invention, and as shown in fig. 3, the addressable laser driver circuit further includes an external signal input module 160; the external signal input module 160 is connected with the driving signal input module 120; the external signal input module 160 is used for providing a first driving signal; the control module 110 is further configured to provide a second driving signal, and the driving signal input module 120 is configured to form a driving signal according to the first driving signal or the second driving signal.
Specifically, the external signal input module 160 is connected to the driving signal input module 120, and the external signal input module 160 transmits the generated first driving signal to the driving signal input module 120. Meanwhile, the second driving signal generated by the control module 110 is also transmitted to the driving signal input module 120. Thus, the driving signal input module 120 can select a source of the driving signal transmitted to the driving module 140. If the driving signal input module 120 selects the second driving signal provided by the control module 110 as the source of the driving signal transmitted to the driving module 140, the driving signal input module 120 forms a driving signal according to the second driving signal; if the driving signal input module 120 selects the first driving signal provided by the external signal input module 160 as the source of the driving signal transmitted to the driving module 140, the driving signal input module 120 forms the driving signal according to the first driving signal. The external signal input module 160 can increase the driving signal sources of the addressable laser driving circuit, thereby improving the reliability of the addressable laser driving circuit.
Fig. 4 is a schematic structural diagram of another addressable laser driving circuit according to an embodiment of the present invention, and as shown in fig. 4, the driving signal input module includes an interface unit 121; a first input end of the interface unit 121 is connected to the control module 110, a second input end of the interface unit 121 is connected to the external signal input module 160, and a first output end of the interface unit 121 is connected to the addressing module 130; the control module 110 is configured to transmit the addressing signal to the addressing module 130 through the interface unit 121, and the interface unit 121 is configured to transmit the driving signal to the addressing module 130.
The interface unit 121 integrates interfaces of signal transmission channels between the modules. Specifically, the interface unit 121 is integrated with a transmission channel interface for transmitting an address signal between the control module 110 and the address module 130, a transmission channel interface for transmitting a driving signal formed by a second driving signal between the control module 110 and the address module 130, and a transmission channel interface for transmitting a driving signal formed by a first driving signal between the external signal input module 160 and the address module 130. Accordingly, the control module 110 may transmit the address signal to the address module 130 through the interface unit 121, so that the address module 130 turns on a conducting channel corresponding to an address in the address signal, and the driving signal formed by the second driving signal or the driving signal formed by the first driving signal is transmitted to the driving module 140 corresponding to the conducting channel.
Fig. 5 is a schematic structural diagram of another addressable laser driving circuit according to an embodiment of the present invention, and as shown in fig. 5, the driving signal input module further includes an input selecting unit 122; a second output end of the interface unit 121 is connected to a first end of the input selection unit 122, and a second end of the input selection unit 122 is connected to the addressing module 130; the input selection unit 122 is configured to form a driving signal from the first driving signal or the second driving signal and transmit the driving signal to the addressing module 130.
Specifically, the second output terminal of the interface unit 121 is connected to the first terminal of the input selection unit 122, and the second terminal of the input selection unit 122 is connected to the addressing module 130. When the interface unit 121 receives the first driving signal forming driving signal provided by the external signal input module 160 and the second driving signal forming driving signal provided by the control module 110, the first driving signal forming driving signal and the second driving signal forming driving signal are simultaneously transmitted to the input selection unit 122. The input selection unit 122 may select whether to transmit a driving signal formed of a first driving signal provided from the external signal input module 160 to the address module 130 or to transmit a driving signal formed of a second driving signal provided from the control module 110 to the address module 130.
Illustratively, the input selection unit may be a dial selection switch. Fig. 6 is a schematic structural diagram of a dial selection switch according to an embodiment of the present invention. As shown in fig. 6, the input terminal P1 of the dial switch is connected to the control module through the interface unit, and is configured to receive a driving signal formed by a second driving signal provided by the control module. The input end P2 of the dial switch is connected to the external signal input module through the interface unit, and is configured to receive a first driving signal provided by the external signal input module to form a driving signal. When the switch S1 inside the dial switch is closed and the switch S2 is open, the driving signal formed by the second driving signal provided by the control module is transmitted from the output terminal OUT of the dial switch to the addressing module; when the switch S2 inside the dial switch is closed and the switch S1 is opened, the first driving signal provided by the external signal input module forms a driving signal, and the driving signal is transmitted from the output terminal OUT of the dial switch to the addressing module.
Fig. 7 is a schematic structural diagram of another addressable laser driving circuit according to an embodiment of the present invention, and as shown in fig. 7, the addressable laser driving circuit further includes a power module 170; a third input end of the interface unit 121 is connected to an external high voltage power supply, a third output end of the interface unit 121 is connected to the power module 170, and the power module 170 is connected to the control module 110, the addressing module 130, and the driving module 140 respectively; the power module 170 is used for supplying power to the control module 110, the addressing module 130 and the driving module 140.
Specifically, the third input end of the interface unit 121 is connected to an external high voltage power supply, and the third output end of the interface unit 121 is connected to the power module 170, so that the power module 170 can be connected to the external high voltage power supply through the interface unit 121, and the high voltage power supply transmitted by the external high voltage power supply is converted into a voltage signal suitable for the control module 110, the addressing module 130, and the driving module 140, so as to supply power to the control module 110, the addressing module 130, and the driving module 140.
Optionally, the power supply module comprises a dc/dc conversion module; the direct current/direct current conversion module is used for converting a high-voltage power supply signal generated by an external high-voltage power supply into a low-voltage power supply signal.
The direct current/direct current conversion module can convert a high-voltage power supply signal generated by an external high-voltage power supply into a low-voltage power supply signal. The power supply module comprises a direct current/direct current conversion module, so that a high-voltage power supply signal can be converted into a low-voltage power supply signal suitable for the control module, the addressing module and the driving module, and therefore, the power supply of a single power supply is realized without the supply of an external low-voltage power supply.
For example, fig. 8 is a schematic structural diagram of a power module according to an embodiment of the present invention. As shown in fig. 8, the dc/dc conversion module 171 is a power conversion chip with a model LM317, a high voltage input terminal HV of the dc/dc conversion module 171 is used for receiving a high voltage power signal generated by an external high voltage power supply, and the dc/dc conversion module 171 converts the high voltage power signal into a low voltage signal used by the control module, the addressing module and the driving module, and outputs the low voltage signal by a low voltage output terminal VL1 and a low voltage output terminal VL2 of the dc/dc conversion module 171.
Fig. 9 is a schematic structural diagram of a driving module according to an embodiment of the present invention. As shown in fig. 9, the driving module includes a driving chip 141, a voltage stabilizing unit 142, a current limiting unit 143, and a charging and discharging unit 144; the input end of the driving chip 141 is connected to the addressing module, the output end Q2 of the driving chip 141 is connected to the first end of the laser 200, the first end of the voltage stabilizing unit 142 is connected to the power module, the second end of the voltage stabilizing unit 142 is connected to the first end of the current limiting unit 143, the second end of the current limiting unit 143 is connected to the first end of the charge and discharge unit 144, the second end of the laser 200 and the current testing module 150, and the second end of the charge and discharge unit 144 is grounded; the driving chip 141 is used for starting the laser 200; the voltage stabilizing unit 142 is used for maintaining the stability of the high-voltage power signal transmitted by the power module; the current limiting unit 143 is used to reduce the input current of the charging and discharging unit; the charge and discharge unit 144 is used to provide power to the laser 200.
The driving chip 141 is a short pulse driving chip, which can start the laser 200 according to a driving signal (the driving signal is a short pulse signal). The voltage stabilizing unit 142 may maintain the stability of the high voltage power signal input by the power module, for example, the voltage stabilizing unit 142 may filter the high voltage power signal input by the power module to keep the input high voltage power signal substantially unchanged. The current limiting unit 143 may reduce the charging current of the charging/discharging unit 144 when the charging/discharging unit is charged, and prevent the charging/discharging unit 144 from being damaged due to an excessive input current of the charging/discharging unit 144. The charging and discharging unit 144 may store electric energy during charging, and may provide a large electric energy to the laser 200 during discharging, increasing the driving current to start the laser 200.
Specifically, the input end Q1 of the driving chip 141 is connected to the addressing module, the output end Q2 of the driving chip 141 is connected to the first end of the laser 200, the first end of the voltage stabilizing unit 142 is connected to the power supply module, the second end of the voltage stabilizing unit 142 is connected to the first end of the current limiting unit 143, the second end of the current limiting unit 143 is connected to the first end of the charging and discharging unit 144, the second end of the laser 200 and the current testing module 150, and the second end of the charging and discharging unit 144 is grounded. When the addressing module turns on the channel formed by the driving chip 141, the driving module may receive the driving signal transmitted by the channel formed by the addressing module and the driving chip 141. When the driving signal is a high pulse, the output Q2 of the driving chip 141 is electrically connected to the ground Q3 of the driving chip 141, i.e., the first end of the laser 200 is grounded. At this time, the power module and the charging and discharging unit 144 simultaneously supply power to the second end of the laser 200, and an energizing loop is formed at both ends of the laser 200, thereby starting the laser 200. When the driving signal is a low pulse, the output terminal Q2 of the driver chip 141 is disconnected from the ground terminal Q3 of the driver chip, and the two terminals of the laser 200 cannot form a power-on loop, so that the laser 200 cannot be started.
Optionally, the driver chip is model EPC 21601.
The driving chip is a Mos chip with a door driver inside, and the model number of the Mos chip is EPC 21601. The drive chip of EPC21601 type can modulate and realize laser drive current of up to 10A under ultra-high frequency of over 100MHz and ultra-short pulse of less than 2 ns. In addition, the drive chip of EPC21601 model integrates a single-chip driver of a gallium nitride integrated circuit technology and a gallium nitride field effect transistor, adopts chip scale packaging, and has the external dimension of only 1.5mm x 1.0 mm. Therefore, the addressable laser driving circuit designed by the driving chip with the EPC21601 type and small shape is small in size and high in performance.
Fig. 10 is a schematic structural diagram of a current testing module according to an embodiment of the present invention. As shown in fig. 10, the current test module includes a detection unit 151 and a detection interface 152; a first end of the detection unit 151 is connected with the driving module, a second end of the detection unit 151 is connected with a first end of the detection interface 152, and a second end of the detection interface 152 is connected with an external detection device; the detection unit 151 is used for acquiring the driving current generated by the driving module and transmitting the driving current to the external detection device through the detection interface 152.
The first end of the detection unit 151 is connected to the driving module, and can obtain the driving current generated by the driving module. Specifically, a first end of the detection unit 151 is connected to a first end of the charge and discharge module, and the detection unit 151 may obtain a voltage change of the charge and discharge unit during the charge and discharge processes, so as to obtain a driving current of the charge and discharge unit during the charge and discharge processes. The second end of the detection unit 151 is connected to the first end of the detection interface 152, and the detection unit 151 transmits the voltage variation of the charge and discharge unit in the charge and discharge process to the detection interface 152. The second end of the detection interface 152 is connected with an external detection device, the external detection device displays the voltage change of the charge and discharge unit in the charge and discharge process through the detection interface 152, and obtains the driving current generated by the charge and discharge unit in the discharge process according to the voltage change trend of the charge and discharge unit in the charge and discharge process, so that the driving performance of the driving module is judged according to the magnitude of the driving current.
Optionally, the detection interface may adopt an IPEX connection, and the IPEX connection has the characteristics of high transmission speed and small volume, and can further reduce the volume of the addressable laser driving circuit.
The embodiment of the invention also provides an addressable laser instrument, which comprises the addressable laser driving circuit and the laser in any one of the embodiments; the addressable laser driving circuit is connected with the laser, and the addressable laser driving circuit is used for starting the laser.
Fig. 11 is a schematic structural diagram of an addressable laser device according to an embodiment of the present invention, and as shown in fig. 11, an addressable laser driving circuit is connected to the laser device 200, and the addressable laser driving circuit can activate the laser device 200.
The addressable laser instrument comprises the addressable laser driving circuit provided by any embodiment of the invention, so that the addressable laser driving circuit provided by the embodiment of the invention has the beneficial effects, and the details are not repeated here.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will 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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An addressable laser driving circuit is characterized by comprising a control module, a driving signal input module, an addressing module, a plurality of driving modules and a plurality of current testing modules;
the driving signal input module is connected with the control module, the driving signal input module is connected with the addressing module, the addressing module is provided with a plurality of output ends, each output end is connected with one driving module to form a channel, and each driving module is connected with one current testing module; the control module is used for providing addressing signals for the addressing module through the driving signal input module, the channels correspond to addresses in the addressing signals one by one, and the addressing module is used for conducting the channels corresponding to the addresses according to the addressing signals; the driving signal input module is used for providing a driving signal for the addressing module, and the driving module is used for starting a laser according to the driving signal and forming a driving current; the current testing module is used for detecting the driving performance of the driving module according to the driving current.
2. The addressable laser driver circuit of claim 1, further comprising an external signal input module;
the external signal input module is connected with the driving signal input module; the external signal input module is used for providing a first driving signal; the control module is further configured to provide a second driving signal, and the driving signal input module is configured to form the driving signal according to the first driving signal or the second driving signal.
3. The addressable laser driver circuit of claim 2, wherein the driving signal input module comprises an interface unit;
the first input end of the interface unit is connected with the control module, the second input end of the interface unit is connected with the external signal input module, and the first output end of the interface unit is connected with the addressing module; the control module is used for transmitting the addressing signal to the addressing module through the interface unit, and the interface unit is used for transmitting the driving signal to the addressing module.
4. The addressable laser driver circuit of claim 3, wherein the driving signal input module further comprises an input selection unit;
the second output end of the interface unit is connected with the first end of the input selection unit, and the second end of the input selection unit is connected with the addressing module; the input selection unit is used for forming the driving signal by the first driving signal or the second driving signal and transmitting the driving signal to the addressing module.
5. The addressable laser driver circuit of claim 3, further comprising a power module;
a third input end of the interface unit is connected with an external high-voltage power supply, a third output end of the interface unit is connected with the power supply module, and the power supply module is respectively connected with the control module, the addressing module and the driving module; the power module is used for supplying power to the control module, the addressing module and the driving module.
6. The addressable laser driver circuit of claim 5, wherein the power supply module comprises a DC/DC conversion module;
the direct current/direct current conversion module is used for converting a high-voltage power supply signal generated by the external high-voltage power supply into a low-voltage power supply signal.
7. The addressable laser driving circuit according to claim 5, wherein the driving module comprises a driving chip, a voltage stabilizing unit, a current limiting unit and a charging and discharging unit;
the input end of the driving chip is connected with the addressing module, the output end of the driving chip is connected with the first end of the laser, the first end of the voltage stabilizing unit is connected with the power module, the second end of the voltage stabilizing unit is connected with the first end of the current limiting unit, the second end of the current limiting unit is connected with the first end of the charging and discharging unit, the second end of the laser and the current testing module, and the second end of the charging and discharging unit is grounded;
the driving chip is used for starting the laser; the voltage stabilizing unit is used for maintaining the stability of a high-voltage power supply signal transmitted by the power supply module; the current limiting unit is used for reducing the input current of the charging and discharging unit; the charging and discharging unit is used for providing a power supply for the laser.
8. The addressable laser driver circuit of claim 7, wherein the driver chip is EPC 21601.
9. The addressable laser driving circuit according to any of claims 1-7, wherein the current testing module comprises a detection unit and a detection interface;
the first end of the detection unit is connected with the driving module, the second end of the detection unit is connected with the first end of the detection interface, and the second end of the detection interface is connected with external detection equipment; the detection unit is used for acquiring the driving current generated by the driving module and transmitting the driving current to the external detection equipment through the detection interface.
10. An addressable laser device, comprising the addressable laser driving circuit of any one of claims 1 to 9 and a laser;
the addressable laser driving circuit is connected with the laser, and the addressable laser driving circuit is used for starting the laser.
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