Calibration device, laser emission circuit and electronic equipment

Abstract

The present application relates to a calibration device, a laser emission circuit and an electronic device. The calibration device is applied to the laser emission circuit. The laser emission circuit includes N lasers. The calibration device includes: a detection module, which is used to detect the optical power of the i-th laser; a control module, which is used to adjust the i-th control signal according to the detection result of the detection device so that the i-th optical power is equal to the target optical power; wherein N≥i≥1, the i-th control signal is used to control the optical power of the i-th laser when it emits light; the i-th optical power is the optical power when the i-th laser emits light; the control module is also used to construct a mapping relationship between the i-th laser and the i-th control signal when the i-th optical power is equal to the target optical power; the present application can improve the uniformity of the optical power of multiple lasers.

Description

Technical Field

[0001] The present application relates to the field of laser emission technology, and in particular to a calibration device, a laser emission circuit and an electronic device. Background Art

[0002] As LiDAR technology develops towards integration, laser arrays are widely used in LiDAR. However, due to process errors in laser manufacturing, multiple lasers in the laser emission circuit emit uneven light when they are selected to emit light. The uneven light emission of multiple lasers, that is, different light emission powers, will lead to different ranging capabilities within the field of view of the multiple lasers. The laser with lower light emission power limits the distance measurement capability of the LiDAR, which may cause distortion of the point cloud image, thereby reducing the detection accuracy of the LiDAR.

[0003] Therefore, how to improve the light emission uniformity of the laser array is a technical problem that those skilled in the art need to solve. Summary of the invention

[0004] In order to at least partially solve the problems existing in the related art, the present application provides a calibration device, a laser emission circuit and an electronic device, which can improve the uniformity of the optical power of multiple lasers.

[0005] In a first aspect, the present application provides a calibration device, which is applied to a laser emission circuit, wherein the laser emission circuit includes N lasers, where N is a positive integer and N is greater than or equal to 2, and the calibration device includes:

[0006] A detection module, used for detecting the optical power of the i-th laser;

[0007] A control module, used for adjusting the ith control signal according to the detection result of the detection device so that the ith optical power is equal to the target optical power; wherein, N≥i≥1, the ith control signal is used for controlling the optical power when the ith laser emits light; the ith optical power is the optical power when the ith laser emits light;

[0008] The control module is further configured to construct a mapping relationship between the ith laser and the ith control signal when the ith optical power is equal to the target optical power.

[0009] A second aspect of the present application provides a laser emitting circuit, which includes N lasers, wherein the laser emitting circuit obtains the i-th control signal corresponding one-to-one to the i-th laser according to the mapping relationship provided by the above-mentioned calibration device, so that the optical power of the i-th laser when emitting light is equal to the target optical power, N≥i≥1.

[0010] The third aspect of the present application provides an electronic device, which includes a laser emitting circuit, which includes N lasers; the electronic device also includes a main control unit: the main control unit is configured with a mapping relationship; the mapping relationship is used for the laser emitting circuit to obtain an i-th control signal corresponding to the i-th laser; wherein the i-th control signal is used to control the i-th laser to emit light, so that the i-th optical power when the i-th laser emits light is equal to the target optical power, N≥i≥1.

[0011] A fourth aspect of the present application provides a computer-readable storage medium having executable code stored thereon. When the executable code is executed by a processor of an electronic device, the processor executes the above method.

[0012] A fifth aspect of the present application provides a computer program product, including executable code, which implements the above method when the executable code is executed.

[0013] The technical solution provided by this application may have the following beneficial effects:

[0014] In the embodiments of the present application, some embodiments of the present application can calibrate the control signals of N lasers. For example, when the optical power of the i-th laser reaches the target optical power, a mapping relationship can be established between the i-th control signal for the i-th laser and the i-th laser. In this way, the user can determine the i-th control signal corresponding to the i-th laser among the N lasers based on the mapping relationship, which helps to make the optical power of each laser port among the N lasers close to or reach the target optical power, and improve the uniformity of the optical power of the N lasers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0016] Figure 1 It is a schematic diagram of an application scenario of a calibration device and an electronic device shown in an embodiment of the present application;

[0017] Figure 2 is a block diagram of a calibration device shown in an embodiment of the present application;

[0018] Figure 3 This is a circuit structure diagram of a charging circuit with adjustable energy storage shown in an embodiment of the present application;

[0019] Figure 4 is a circuit structure diagram of a laser emission circuit shown in one embodiment of the present application;

[0020] Figure 5 is a circuit structure diagram of a two-dimensional laser array shown in an embodiment of the present application;

[0021] Figure 6 is a structural block diagram of an electronic device shown in an embodiment of the present application;

[0022] Figure 7 is another structural block diagram of an electronic device shown in an embodiment of the present application;

[0023] Figure 8 is another structural block diagram of an electronic device shown in an embodiment of the present application;

[0024] Fig. 9 A schematic diagram of a circuit structure of an anode addressable driving circuit provided in one embodiment of the present application;

[0025] Fig.10 A schematic diagram of a framework structure of an anode site selection drive circuit provided in one embodiment of the present application;

[0026] Fig.11 A schematic diagram of a circuit structure of an anode site selection drive circuit provided in one embodiment of the present application;

[0027] Fig.12 Another circuit structure diagram of an anode site selection drive circuit provided in an embodiment of the present application;

[0028] Fig.13 A schematic diagram of another framework structure of an anode addressable driving circuit provided in one embodiment of the present application;

[0029] Fig.14 is another schematic diagram of a framework structure of an electronic device shown in an embodiment of the present application;

[0030] Fig.15 is another schematic diagram of a framework structure of an electronic device shown in an embodiment of the present application;

[0031] Fig.16 is a flow chart of a calibration method shown in an embodiment of the present application;

[0032] Fig.17 This is another flow chart of a calibration method shown in an embodiment of the present application. DETAILED DESCRIPTION

[0033] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0034] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "an" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0035] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0036] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0037] Figure 1 This is a schematic diagram of an application scenario of an electronic device (the electronic device may include a laser radar) shown in an embodiment of the present application.

[0038] Figure 1The hardware structure of a vehicle 10 supporting assisted driving or automatic driving functions is shown. For example, at least one laser radar (Laser Imaging Detection and Ranging, referred to as LIDAR) 11 is mounted on the roof and / or the side of the vehicle body of the vehicle 10. The detection area of ​​the LIDAR 11 can be fixed, such as a certain LIDAR 11 can be used only to detect a preset area. The detection area of ​​the LIDAR 11 can be adjustable, such as the laser radar on the vehicle body can scan multiple detection areas by adjusting the posture, etc., or by adjusting the field of view of the laser radar itself. Scanning multiple detection areas. Specifically, the vehicle 10 can be equipped with 5 LIDARs 11: the top of the vehicle, the front side of the vehicle, the rear side of the vehicle, the left side of the vehicle, and the right side of the vehicle. Through multiple LIDARs 11, the outline of objects existing in the area around the vehicle and the distance to the object can be detected; the laser radar 11 can be arranged according to actual needs, and the present application does not limit the layout position of the laser radar 11.

[0039] With the continuous development of LiDAR technology, laser technology has been integrated from discrete single tubes to one-dimensional arrays, and then further integrated into two-dimensional arrays. Among them, laser arrays are also more and more widely used in electronic devices. However, in the manufacturing process of lasers, due to the influence of many factors such as fluctuations in the manufacturing environment, fluctuations in process parameters, fluctuations in the purity of raw materials, etc., the optical power of multiple lasers under the same excitation conditions is different. For example, a laser emission circuit includes multiple lasers (such as a laser array), and there are differences between the multiple lasers, so that when the same emission power supply is used to drive multiple lasers to emit light, there are differences in the emission power between the multiple lasers. The above phenomenon will cause the laser emission circuit including multiple lasers to have uneven light emitting power.

[0040] In order to solve the problem of uneven light emission of multiple lasers. In the first aspect, an embodiment of the present application provides a calibration device, which is applied to an electronic device including a laser emission circuit, and the laser emission circuit uses N lasers to emit light, and the light emission power of the N lasers is determined by their respective control signals; the calibration device provided by the present application can pre-calibrate the control signals of the N lasers to improve the uniformity of the optical power of the lasers; wherein N is a positive integer, and N≥2.

[0041] It can be understood that the N lasers may be N independent laser light sources, such as N LDs (laser diodes); or they may be N second laser units in a two-dimensional laser array, each second laser unit including multiple laser light sources (such as multiple LDs), the N second laser units may be addressed and emitted in a partitioned manner under the drive of an addressable drive circuit, and the addressable drive circuit may drive multiple laser light sources in the first second laser unit in a time-sharing manner under the control of an addressing drive signal (t 21 time), a plurality of laser light sources in the second second laser unit (t 22 time) ... a plurality of laser light sources in the Nth second laser unit (t 23 At this time, the calibration device 300 calibrates the optical power of multiple second laser units in the two-dimensional laser array by partitioning, so that the optical powers of multiple second laser units located in different areas of the two-dimensional laser array are equal to their respective target optical powers; the N lasers can also be N first laser units in a one-dimensional laser array, each first laser unit includes multiple laser light sources (such as multiple LDs), and the N first laser units can be partitioned and addressed to emit light under the drive of an addressable driving circuit, and the addressable driving circuit drives the multiple laser light sources (t 11 time), a plurality of laser light sources in the second first laser unit (t 12 time) ... a plurality of laser light sources in the Nth first laser unit (t 13 moment); at this time, the calibration device 300 calibrates the optical powers of multiple first laser units in the one-dimensional laser array by partitioning, so that the optical powers of multiple first laser units located in different areas of the one-dimensional laser array are equal to their respective target optical powers; the present application does not limit the specific structure of the N lasers.

[0042] Preferably, the above-mentioned laser emitting circuit can be applied to electronic equipment that uses laser for detection. The laser emitting circuit can include a laser array consisting of m×n lasers, that is, N=m*n, m and n are positive integers, and N lasers are arranged in an array on a carrier (such as a transmitting plate).

[0043] Figure 2 is a block diagram of a calibration device shown in an embodiment of the present application. Figure 2 The calibration device 300 includes: a detection module 310 and a control module 320 .

[0044] The detection module 310 is used to detect the optical power of N lasers. Specifically, the detection module 310 may use an optical power meter to detect the optical power of multiple lasers when emitting light.

[0045] The control module 320 is used to adjust the i-th control signal according to the detection result of the detection module 310 so that the i-th optical power is equal to the target optical power. Wherein, N≥i≥1, the i-th control signal is used to control the optical power of the i-th laser when it emits light. The i-th optical power is the optical power when the i-th laser emits light. For example, for the i-th control signal of the i-th laser, when the optical power of the i-th laser is less than the target optical power, the optical power of the i-th laser can be increased by adjusting the i-th control signal so that the i-th optical power is equal to the target optical power.

[0046] For example, when the optical power of the ith laser is greater than the target optical power, the optical power of the ith laser can be reduced by adjusting the ith control signal so that the ith optical power is equal to the target optical power. The ith control signal can be a high level or a low level signal. In a specific implementation, the ith control signal can be a pulse signal, and the optical power of the laser is adjusted by controlling the pulse width of the pulse signal.

[0047] It should be noted that the above expression "equal to" may include the meaning of being strictly equal to or approximately equal to. For example, the i-th optical power may be within a certain threshold range of the target optical power, and the threshold may be determined based on experience or the requirements of the application scenario. For example, target optical power × (95%) ~ target optical power × (105%). For example, target optical power × (97%) ~ target optical power × (103%). For example, target optical power × (99%) ~ target optical power × (101%). For example, target optical power × (99.9%) ~ target optical power × (100.2%). The same applies to the expression "equal to" appearing below.

[0048] In addition, the control module 320 is further configured to construct a mapping relationship between the ith laser and the ith control signal when the ith optical power is equal to the target optical power.

[0049] In this embodiment, the identification of the ith laser and the identification of the ith control signal may be stored in association. The identification of the ith laser and the parameter of the ith control signal may also be stored in association. In addition, information that can characterize the ith laser and information that can characterize the ith control signal may also be stored in association, which is not limited here.

[0050] In an exemplary embodiment, the laser emission circuit further includes at least one charging circuit 110 with adjustable energy storage, and the N lasers emit light using the electric energy provided by the charging circuit 110 with adjustable energy storage. The energy storage value of the charging circuit 110 with adjustable energy storage determines the emission optical power (hereinafter referred to as optical power) of the laser, and the optical power of the N lasers is equal to the target optical power by adjusting the energy storage value of the charging circuit 110 with adjustable energy storage corresponding to the emission of the N lasers.

[0051] In this embodiment, the energy storage value of the charging circuit 110 with adjustable energy storage is controlled by a charging control signal, and the optical power of a certain laser is adjusted by adjusting the charging control signal; the calibration device provided in this application can pre-calibrate the charging control signal corresponding to N lasers to improve the uniformity of the optical power of the laser. In this embodiment, the i-th control signal is the i-th charging control signal, and the i-th charging control signal is used to control the charging circuit 110 with adjustable energy storage to store the i-th electrical energy. The i-th electrical energy is used to provide energy for the i-th laser to emit light. The control module adjusts the i-th electrical energy through the i-th charging control signal so that the i-th optical power is equal to the target optical power. Among them, the charging circuit 110 with adjustable energy storage can use components such as capacitors and inductors to store electrical energy.

[0052] The following is an exemplary description of the charging circuit 110 with adjustable energy storage.

[0053] Figure 3 It is a circuit diagram of a charging circuit with adjustable energy storage shown in an embodiment of the present application.

[0054] See also Figure 3 The charging circuit with adjustable energy storage includes a charging switch element Q1 and an energy temporary storage element L. The charging switch element Q1 is connected between the transmitting power supply and the energy temporary storage element L. When the charging switch element Q1 is turned on, the energy temporary storage element L uses the transmitting power supply to store electric energy. The charging switch element Q1 can be a MOS tube, such as an NMOS tube.

[0055] It should be noted that Figure 3 The energy storage element L shown in is only shown as an example, and more energy storage elements may be included, such as capacitor elements, etc. The multiple energy storage elements L may be connected to the input end or the output end of the charging switch element Q1 in series. In addition, the multiple energy storage elements L may be connected to the input end and the output end of the charging switch element Q1 in series.

[0056] Figure 3 The energy temporary storage element L in the embodiment has a first end connected to the transmitting power source E, and a second end connected to the first end of the charging switch element and one end of the anode address driver.

[0057] The charging switch element Q1 includes a first end, a second end and a charging enable end, wherein the first end is connected to the second end of the energy storage element L, the second end is grounded, and the charging enable end is connected to the control module to receive the charging control signal output by the control module. The charging switch element Q1 is turned on or off under the control of the charging control signal, so that the energy storage value of the energy storage element L can be adjusted.

[0058] In a specific embodiment, the charging switch element Q1 is an NMOS tube, and the drain of the NMOS tube is connected to the second end of the energy storage element L as the first end of the charging switch element Q1. The source of the NMOS tube is grounded as the second end of the charging switch element Q1, and the gate of the NMOS tube is connected to the charging control signal as the charging enable terminal. The NMOS tube is turned on or off under the control of the charging control signal.

[0059] In this embodiment, the transmitting power source E is connected to the charging circuit with adjustable energy storage to charge the charging circuit with adjustable energy storage. The output current of the charging circuit with adjustable energy storage is positively correlated with the energy stored in the energy storage element L in the charging circuit with adjustable energy storage. When the optical power of the i-th laser needs to be increased, the conduction time of the charging switch element Q1 can be increased by controlling the i-th charging control signal to increase the energy stored in the energy storage element L, thereby increasing the charging current output by the energy storage element L to the anode energy storage element, and adjusting the optical power of the laser using the anode energy storage element.

[0060] In this embodiment, the i-th charging control signal is used to turn on or off the charging switch element Q1. When the charging switch element Q1 is turned on, a first charging loop is formed between the transmitting power source E-energy storage element L-charging switch element Q1-ground. The energy storage element L uses the output current of the transmitting power source E to store electrical energy. When the charging switch element Q1 is turned off, the energy storage element L stops storing electrical energy.

[0061] The control module 320 adjusts the conduction time of the charging switch element Q1 through the i-th charging control signal, and then adjusts the energy value of the i-th electric energy so that the i-th optical power is equal to the target optical power. For example, the i-th charging control signal controls the energy storage value of the charging circuit 110 with adjustable energy storage by controlling the conduction time of the charging switch element Q1. The energy storage value of the charging circuit 110 with adjustable energy storage is positively correlated with the conduction time of the charging switch element Q1.

[0062] In some embodiments, the i-th charging control signal is a pulse signal, and the on-time of the charging switch element Q1 is related to the pulse width of the i-th charging control signal. For example, the on-time of the charging switch element is positively correlated with the pulse width of the charging control signal. It can be understood that the wider the pulse width, the higher the duty cycle can be obtained, and the on-time of a specific type of charging switch element Q1 can be increased.

[0063] In some embodiments, the mapping relationship constructed by the control module 320 is a mapping relationship between the pulse width of the i-th laser and the i-th charging control signal. When the i-th laser is selected to emit light, the above-mentioned charging circuit 110 with adjustable energy storage obtains the i-th charging control signal corresponding to the i-th laser one by one, so that the i-th optical power is equal to the target optical power. For example, the mapping relationship can be expressed in the form of a key-value pair, a table, a mathematical model, etc. The pulse width can be represented by a duration, and the unit of the duration can be microseconds, milliseconds, etc. For example, a certain type of charging control signal can be characterized by a preset signal identifier to determine the i-th charging control signal corresponding to a certain pulse width.

[0064] In some embodiments, the control module 320 is also used to generate a pulse parameter configuration table according to the mapping relationship and the pulse width, and the above-mentioned laser emission circuit generates an i-th control signal corresponding to the i-th laser based on the pulse parameter configuration table so that the i-th optical power is equal to the target optical power.

[0065] For example, the pulse parameter configuration table stores pulse widths for determining multiple charging control signals. The electronic device can configure the pulse widths of the charging control signals according to the parameter configuration table to output the i-th charging control signal corresponding to the i-th laser to the charging circuit 110 with adjustable energy storage.

[0066] In some embodiments, N lasers are arranged in an array. Multiple lasers located in the same row of N lasers are connected through a common anode terminal, and multiple rows of lasers are connected to a charging circuit 110 with adjustable energy storage through a one-to-one common anode terminal. The charging circuit 110 with adjustable energy storage is used to provide electrical energy for the selected laser to emit light. The charging circuit 110 with adjustable energy storage stores the i-th electrical energy corresponding to the i-th laser according to the mapping relationship, so that the i-th optical power is equal to the target optical power.

[0067] like Figure 4 As shown in Figure 5, taking a two-dimensional laser array as an example, N lasers are arranged in a two-dimensional array, and the laser emission circuit includes a two-dimensional laser array composed of N lasers and a laser array addressable driving circuit; the laser array addressable driving circuit is externally connected to a site selection driving signal, and multiple lasers in the laser array are site-selected and driven to emit light by scanning.

[0068] Specifically, the anodes of the lasers in the same row in the two-dimensional laser array are electrically connected and lead out to a common anode terminal, and the cathodes of the lasers in the same column in the two-dimensional laser array are electrically connected and lead out to a common cathode terminal; the addressable driving circuit of the laser array includes an anode addressable driving circuit 100 and a cathode addressable driving circuit 200, and the anode addressable driving circuit 100 includes the above-mentioned charging circuit 110 with adjustable energy storage and multiple anode addressing driving circuits 120; the cathode addressable driving circuit includes multiple cathode addressing driving circuits 220; the multiple anode addressing driving circuits 120 are respectively connected to the multiple common anode terminals corresponding to the multiple rows of lasers in a one-to-one correspondence, and the multiple anode addressing driving circuits 120 perform anode addressing driving on the anodes of the multiple rows of lasers in a scanning manner through external anode addressing signals; the multiple cathode addressing driving circuits 220 are connected to the multiple common cathode terminals corresponding to the multiple columns of lasers in a one-to-one correspondence, and the multiple cathode addressing driving circuits 220 perform cathode addressing driving on the cathodes of the multiple columns of lasers in the laser array in a scanning manner through external cathode addressing signals.

[0069] like Figure 4 As shown, the charging circuit 110 with adjustable energy storage is connected to the transmitting power source E and the plurality of anode addressing drive circuits 120, uses the output current of the transmitting power source E to store electric energy, and outputs a charging current with adjustable value to the anode addressing drive circuit 120 in the on state; the x-th anode addressing drive circuit 120 is connected to the anode of the laser LDxy in the laser array through a one-to-one corresponding common anode terminal, x represents a row of lasers, x is a positive integer, and x=1,2…m, m is the total number of anode addressing drive circuits 120, and is also the total number of common anode terminals; y represents a column of lasers, y is a positive integer, and y=1,2…n, n is the total number of cathode addressing drive circuits 220, and is also the total number of common cathode terminals.

[0070] In this embodiment, the anode addressable driving circuit 100 outputs a charging current with adjustable value to the anode addressing driving circuit 120 in the on state through the charging circuit 110 with adjustable energy storage, so as to adjust the current output by the anode addressing driving circuit 120 to the laser, thereby making the optical power of the lasers in the two-dimensional laser array equal to the target optical power.

[0071] It should be noted that the above two-dimensional laser array is only an exemplary description and cannot be understood as limiting the scope of application of the present application. For example, the technical solution of the present application can also be applied to multiple lasers arranged in a circular manner, multiple lasers arranged in a linear manner, or multiple lasers arranged in an irregular manner.

[0072] In a second aspect, the present application embodiment further provides an electronic device 400, see Figure 6As shown, the electronic device 400 includes a laser emitting circuit 410, and the laser emitting circuit 410 includes N lasers: laser 1 to laser N. Among them, the N lasers can obtain one-to-one corresponding control signals according to the mapping relationship provided by the calibration device 300 as described above, so that the optical power of the N lasers is equal to the target optical power.

[0073] Specifically, the i-th laser can obtain a one-to-one corresponding i-th control signal according to the mapping relationship provided by the calibration device 300 as shown above, so that the optical power of the i-th laser when emitting light is equal to the target optical power, i is a positive integer, and N≥i≥1.

[0074] In this embodiment, each laser can determine the required i-th control signal based on its own laser identification and the above mapping relationship, so that the optical power of each laser under the corresponding i-th control signal is the same as the target optical power.

[0075] Among them, the i-th control signal can directly act on the i-th laser to drive the i-th laser to emit light. For example, the i-th laser can be controlled one by one by time-sharing, such as N lasers can be independently controlled based on the control signal. In addition, the i-th control signal can also control the power supply circuit to provide electrical energy to the i-th laser to drive the i-th laser to emit light. For example, N lasers can be controlled by the same power supply circuit. This embodiment can improve the optical power uniformity of multiple lasers based on the calibration results (such as the above-mentioned mapping relationship).

[0076] Figure 7 It is another block diagram of an electronic device shown in an embodiment of the present application.

[0077] See also Figure 7 , the electronic device 400 includes a laser emitting circuit 410 and a main control unit 420. The laser emitting circuit 410 includes N lasers: laser 1 to laser N. The main control unit 420 is configured with the mapping relationship provided by the calibration device 300 as described above, and generates control signals corresponding to the N lasers one by one according to the mapping relationship; the N lasers can achieve optical powers equal to the target optical powers under the control of the above-mentioned one-to-one corresponding control signals. For example, the i-th control signal is used to control the optical power of the i-th laser when it emits light, so that the i-th optical power of the i-th laser when it emits light is equal to the target optical power, N≥i≥1, and N is an integer greater than 1.

[0078] Figure 8 It is another block diagram of an electronic device shown in an embodiment of the present application.

[0079] See also Figure 8The electronic device 400 includes a laser emitting circuit 410 and a main control unit 420. The laser emitting circuit 410 includes a two-dimensional laser array composed of N lasers and an addressable driving circuit for the laser array; the addressable driving circuit for the laser array is externally connected to a site selection driving signal, and multiple lasers in the laser array are site-selected and driven to emit light by scanning; the main control unit 420 is configured with the mapping relationship provided by the calibration device 300 as described above, and generates control signals corresponding to the N lasers one by one according to the mapping relationship; the N lasers can achieve optical powers equal to the target optical power under the control of the above-mentioned one-to-one corresponding control signals.

[0080] Specifically, the anodes of the lasers in the same row in the two-dimensional laser array are electrically connected and lead out to a common anode terminal, and the cathodes of the lasers in the same column in the two-dimensional laser array are electrically connected and lead out to a common cathode terminal; Figure 8 As shown, the addressable driving circuit of the laser array includes an anode addressable driving circuit 100 and a cathode addressable driving circuit 200. The anode addressable driving circuit 100 includes the above-mentioned charging circuit 110 with adjustable energy storage and multiple anode addressing driving circuits 120; the cathode addressable driving circuit includes multiple cathode addressing driving circuits 220; the multiple anode addressing driving circuits 120 are respectively connected one-to-one with multiple common anode terminals corresponding to multiple rows of lasers, and the multiple anode addressing driving circuits 120 perform anode addressing driving on the anodes of the multiple rows of lasers in a scanning manner through external anode addressing signals; the multiple cathode addressing driving circuits 220 are connected one-to-one with multiple common cathode terminals corresponding to multiple columns of lasers, and the multiple cathode addressing driving circuits 220 perform cathode addressing driving on the cathodes of multiple columns of lasers in the laser array in a scanning manner through external cathode addressing signals.

[0081] In this embodiment, the anode addressable driving circuit 100 outputs a charging current with adjustable value to the anode addressing driving circuit 120 in the on state through the charging circuit 110 with adjustable energy storage, so as to adjust the current output by the anode addressing driving circuit 120 to the laser, thereby making the optical power of the lasers in the two-dimensional laser array equal to the target optical power. In this embodiment, N lasers emit light using the electric energy provided by the charging circuit 110 with adjustable energy storage. Among them, the energy storage value of the charging circuit 110 with adjustable energy storage determines the optical power of the laser, and the energy storage value of the charging circuit 110 with adjustable energy storage corresponding to the N lasers emitting light is adjusted to make the optical power of the N lasers equal to the target optical power.

[0082] Furthermore, the energy storage value of the charging circuit 110 with adjustable energy storage is controlled by a charging control signal, and the optical power of a certain laser is adjusted by adjusting the charging control signal; the main control unit 420 in the above-mentioned electronic device 400 is configured with the mapping relationship provided by the calibration device 300 as described above, and generates charging control signals corresponding to the N lasers one by one according to the mapping relationship; the N lasers can achieve optical powers equal to the target optical powers under the control of the above-mentioned one-to-one corresponding charging control signals, so as to improve the uniformity of the optical powers of the N lasers.

[0083] In this embodiment, the i-th control signal is the i-th charging control signal, and the i-th charging control signal is used to control the charging circuit 110 with adjustable energy storage to store the i-th electric energy. The i-th electric energy is used to provide energy for the i-th laser to emit light. The main control unit 420 adjusts the i-th electric energy through the i-th charging control signal so that the i-th optical power is equal to the target optical power. Among them, the charging circuit 110 with adjustable energy storage can use components such as capacitors and inductors to store electric energy.

[0084] Specifically, the main control unit 420 can output a one-to-one corresponding i-th charging control signal to the charging circuit 110 with adjustable energy storage for the i-th laser of the two-dimensional laser array. In this way, the energy storage value of the charging circuit 110 with adjustable energy storage can be controlled so that the optical power of the i-th laser of the two-dimensional laser array when emitting light is equal to the target power; the charging circuit 110 with adjustable energy storage can receive the current output by the transmitting power source E for charging and energy storage under the control of the i-th charging control signal output by the main control unit 420. In the energy conversion stage, the stored electric energy is transferred to the anode of the laser selected to emit light through the corresponding anode addressing drive circuit 120.

[0085] It should be noted that the control module and the main control unit 420 can implement the same or different functions. When the control module and the main control unit 420 implement different functions respectively, the control module and the main control unit 420 can be set in the same device or in different devices.

[0086] The following is an exemplary description of the charging circuit 110 with adjustable energy storage and the anode driving circuit 120 .

[0087] Fig. 9 1 is a circuit diagram of an anode addressable driving circuit 100 according to an embodiment of the present application. Fig. 9 The charging circuit with adjustable energy storage includes a charging switch element Q1 and an energy temporary storage element L. The charging switch element Q1 is connected between the transmitting power source E and the energy temporary storage element L. When the charging switch element Q1 is turned on, the energy temporary storage element L uses the transmitting power source E to store electric energy. The charging switch element Q1 can be a MOS tube, such as an NMOS tube.

[0088] It should be noted that Figure 3 The energy storage element L shown in is only shown as an example, and more energy storage elements may be included, such as capacitor elements, etc. Multiple energy storage elements may be connected to the input end or the output end of the charging switch element Q1 in series. In addition, multiple energy storage elements L may be connected to the input end and the output end of the charging switch element Q1 in series.

[0089] Fig. 9 The energy temporary storage element L has a first end connected to the transmitting power source E, and a second end connected to a first end of the charging switch element Q1 and one end of a plurality of anode addressing driving circuits 120.

[0090] The charging switch element Q1 includes a first end, a second end and a charging enable end, wherein the first end is connected to the second end of the energy storage element L, the second end is grounded, and the charging enable end is connected to the main control unit 420 to receive the charging control signal output by the main control unit 420. The charging switch element Q1 is turned on or off under the control of the charging control signal, so that the energy storage value of the energy storage element L can be adjusted.

[0091] In a specific embodiment, the charging switch element Q1 is an NMOS tube, and the drain of the NMOS tube is connected to the second end of the energy storage element L as the first end of the charging switch element Q1. The source of the NMOS tube is grounded as the second end of the charging switch element Q1, and the gate of the NMOS tube is connected to the charging control signal as the charging enable terminal. The NMOS tube is turned on or off under the control of the charging control signal.

[0092] In this embodiment, the transmitting power source E is connected to the charging circuit 110 with adjustable energy storage to charge the charging circuit 110 with adjustable energy storage. The output current of the charging circuit 110 with adjustable energy storage is positively correlated with the energy stored in the energy storage element L in the charging circuit 110 with adjustable energy storage. When the optical power of the i-th laser needs to be increased, the conduction time of the charging switch element Q1 can be increased by controlling the i-th charging control signal to increase the energy stored in the energy storage element L, thereby increasing the light-emitting current output by the energy storage element L to the laser through the anode addressing drive circuit 120, and increasing the optical power of the laser selected to emit light.

[0093] In this embodiment, the i-th charging control signal is used to turn on or off the charging switch element Q1. When the charging switch element Q1 is turned on, a first charging loop is formed between the transmitting power source E-energy storage element L-charging switch element Q1-ground. The energy storage element L uses the output current of the transmitting power source E to store electrical energy. When the charging switch element Q1 is turned off, the energy storage element L stops storing electrical energy.

[0094] Among them, the calibration device 300 configures the mapping relationship between N lasers in the two-dimensional laser array and the control signal to the main control unit 420 through the control module; the main control unit 420 generates charging control signals corresponding to the N lasers in the two-dimensional laser array according to the mapping relationship provided by the calibration device 300 as described above, and provides a one-to-one corresponding charging control signal to the charging circuit 110 with adjustable energy storage when the laser is selected to emit light; specifically, the main control unit 420 adjusts the conduction time of the charging switch element Q1 through the i-th charging control signal, and then adjusts the energy value of the i-th electric energy so that the i-th optical power is equal to the target optical power.

[0095] In some embodiments, the i-th charging control signal is a pulse signal, and the on-time of the charging switch element Q1 is related to the pulse width of the i-th charging control signal. For example, the on-time of the charging switch element Q1 is positively correlated with the pulse width of the charging control signal. It can be understood that the wider the pulse width, the higher the duty cycle can be obtained, and the on-time of a specific type of charging switch element Q1 can be increased.

[0096] In some embodiments, the mapping relationship constructed by the main control unit 420 is a mapping relationship between the pulse width of the i-th laser and the i-th charging control signal. When the i-th laser is selected to emit light, the above-mentioned charging circuit 110 with adjustable energy storage obtains the i-th charging control signal corresponding to the i-th laser one by one, so that the i-th optical power is equal to the target optical power. For example, the mapping relationship can be expressed in the form of a key-value pair, a table, a mathematical model, etc. The pulse width can be represented by a duration, and the unit of the duration can be microseconds, milliseconds, etc. For example, a certain type of charging control signal can be characterized by a preset signal identifier to determine the i-th charging control signal corresponding to a certain pulse width.

[0097] In some embodiments, the main control unit 420 can also generate a pulse parameter configuration table according to the mapping relationship and the pulse width, and the above-mentioned laser emitting circuit 410 generates an i-th control signal corresponding to the i-th laser based on the pulse parameter configuration table so that the i-th optical power is equal to the target optical power.

[0098] For example, the pulse parameter configuration table stores pulse widths for determining multiple charging control signals. The electronic device can configure the pulse widths of the charging control signals according to the parameter configuration table to output the i-th charging control signal corresponding to the i-th laser to the charging circuit 110 with adjustable energy storage.

[0099] In a specific implementation, the electronic device may be a laser radar or other device having multiple lasers, and the optical power of the multiple lasers needs to meet the uniformity requirement. In other embodiments, the electronic device may also be other devices that require multiple lasers to emit light uniformly.

[0100] In a specific embodiment, the output current of the transmitting power source E is a fixed value, and the charging control signal controls the charging switch element Q1 to be turned on for an adjustable time, thereby making the amount of energy stored in the energy storage element L adjustable. When the charging switch element Q1 is turned on for an extended time, the energy stored in the energy storage element L increases. When the charging switch element Q1 is turned on for a shorter time, the energy stored in the energy storage element L decreases.

[0101] In this embodiment, the energy stored in the energy storage element L is adjustable to output a charging current with an adjustable value to the anode address driving circuit in the on state, so that the current output by the anode address driving circuit 120 to the laser is adjustable, thereby making the optical power of the laser adjustable.

[0102] Specifically, the energy storage element L is used to store energy and also to release the stored energy. For example, the energy storage element L includes an energy storage inductor, which can convert electrical energy into magnetic energy and store it. For example, the energy storage element L includes an energy storage capacitor, which is composed of a layer of insulating dielectric sandwiched between two metal electrodes. When a voltage is applied between the two metal electrodes, charges will be stored on the electrodes to store energy.

[0103] It should be noted that the energy storage inductor and the energy storage capacitor store and release energy in different ways, but both can be used as elements for storing and releasing energy. The structure and type of the energy storage element L are not specifically limited here.

[0104] Fig.10 It is a block diagram of an anode address drive circuit 120 shown in an embodiment of the present application.

[0105] See also Fig.10 The anode addressing driving circuit 120 includes an anode addressing switch circuit 121 and an anode energy storage circuit 122. The anode addressing switch circuit 121 is connected to the second end of the energy storage element L and the anode energy storage circuit 122. The anode energy storage circuit 122 is connected to the anode of the laser LDxy connected to the corresponding common anode end; the anode addressing switch circuit 121 is turned on or off under the control of an anode addressing signal to turn on or off the second end of the energy storage element L and the anode energy storage circuit 122, and when the anode addressing switch circuit 121 is turned on, the energy stored in the energy storage element L is used to charge the anode energy storage circuit 122, and the anode energy storage circuit 122 outputs a current to drive the laser LDxy to emit light.

[0106] Reference Fig. 9 and Fig.11As shown, in an exemplary embodiment, the anode addressing switch circuit 121 includes an anode addressing switch element Q2, and the anode addressing switch element Q2 includes a first end, a second end and an addressing enable end; the first end of the anode addressing switch element Q2 is connected to the second end of the energy storage element L, and the second end is connected to the anode energy storage circuit 122; the addressing enable end of the anode addressing switch element Q2 is connected to the anode addressing signal, and the anode addressing signal is used to control the anode addressing switch element Q2 to be turned on or off; when the anode addressing switch element Q2 is turned on, the anode energy storage circuit 122 uses the output current of the energy storage element L to store electrical energy, and the output current of the anode energy storage circuit 122 drives the laser LDxy to emit light.

[0107] Preferably, in this embodiment, the anode addressing switch element Q2 is a second NMOS tube, the drain of the second NMOS tube is connected to the energy storage element L as the first end of the anode addressing switch element Q2, the source of the second NMOS tube is connected to the anode energy storage circuit 122 as the second end of the anode addressing switch element Q2, and the gate of the second NMOS tube is connected to the anode addressing signal HS as the anode addressing enable terminal; the second NMOS tube is turned on or off under the control of the anode addressing signal. On the second aspect, in order to solve the problem of parallel parasitic capacitance in the anode addressing switch circuit, the parallel parasitic capacitance causes the laser to leak light and emit light by mistake. Refer to Fig.11 and Fig.12 As shown, the anode energy storage circuit 122 provided in the present application includes an anode energy storage element C, a first end of the anode energy storage element C is connected to the second end of the anode addressing switch element Q2 and the anode of the laser LDxy, and a second end is grounded; when the anode addressing switch element Q2 is turned on, the energy temporary storage element L-anode addressing switch element Q2-anode energy storage element C-ground forms a second charging loop, and the anode energy storage element C uses the output current of the charging circuit 110 with adjustable energy storage to store electrical energy, and releases its own stored electrical energy to output current to drive the laser LDxy to emit light.

[0108] In this embodiment, the anode energy storage element C is charged by the second charging circuit, and the energy stored in the energy storage element L is transferred to the anode energy storage element C. Then, the amount of transferred energy is determined by the energy storage element L. According to the above content, it can be known that the energy stored in the energy storage element L can be controlled by controlling the conduction time of the charging switch element Q1, thereby controlling the energy stored in the anode energy storage element C.

[0109] Preferably, the anode energy storage element C comprises an energy storage capacitor.

[0110] In the related art, when the anode address switch element is turned on, the emission power source E directly outputs current to drive the laser LDxy to emit light. Since the current directly output by the emission power source E is relatively large, the current in the branch where the parasitic capacitor connected in parallel to the anode address switch element K1 is located may be greater than the current threshold at which the laser LDxy can emit light, causing the laser LDxy to leak light and emit light by mistake.

[0111] The anode site selection drive circuit 120 provided in the embodiment of the present application stores electric energy through the anode energy storage circuit 122, and the anode energy storage circuit 122 releases its own stored electric energy to output current to drive the laser LDxy to emit light, so that when the charging circuit 110 with adjustable energy storage uses the stored electric energy to output current to charge the anode energy storage circuit 122, the current output to the laser LDxy through the parallel parasitic capacitor is less than the light-emitting current threshold of the laser LDxy, thereby solving the problem that when the transmitting power source E directly outputs current to drive the laser LDxy to emit light, the laser leaks light and emits light incorrectly due to the existence of the parallel parasitic capacitor.

[0112] Furthermore, the energy stored in the anode energy storage circuit 122 comes from the energy stored in the energy storage element L; wherein, the energy storage element L is preferably an energy storage inductor; on the one hand, the charging speed of the energy storage inductor is slower than that of the capacitor, and the energy stored in the energy storage element L can be better controlled by controlling the conduction time of the charging switch element Q1; on the other hand, the discharge current of the energy storage inductor is small, which is convenient for controlling the current output to the laser LDxy through the parallel parasitic capacitor to be less than the light-emitting current threshold of the laser LDxy when the anode energy storage circuit 122 is charged, thereby avoiding the laser LDxy from leaking light and emitting light by mistake when the transmitting power source E charges the anode energy storage circuit 122 due to the parallel parasitic capacitor.

[0113] In order to solve the problem that the parallel parasitic capacitance exists in the anode site selection switch element Q2, resulting in reduced isolation of the anode site selection switch circuit 121, and the lasers that are not selected to emit light are crosstalked by the electrical signals of the lasers that are selected to emit light.

[0114] The anode addressing switch circuit 121 provided in the embodiment of the present application also includes a unidirectional conductive element and a reverse bias switch element Q3, wherein the unidirectional conductive element is connected between the anode addressing switch element Q2 and the anode energy storage element C; the second end of the unidirectional conductive element is connected to the second end of the anode addressing switch element Q2, and the first end is connected to the first end of the anode energy storage element C; the reverse bias switch element Q3 includes a first end, a second end and a reverse bias enable end, the first end of the reverse bias switch element Q3 is connected to the second end of the unidirectional conductive element, the second end is grounded, and the reverse bias enable end is connected to a reverse bias control signal, and the reverse bias control signal is opposite to the state of the anode addressing signal; specifically, when the anode addressing signal is high, the reverse bias control signal is low, and when the anode addressing signal is low, the reverse bias control signal is high. The reverse bias control signal is used to disconnect the reverse bias switch element Q3 when the anode addressing signal turns on the anode addressing switch element Q2, and the anode addressing switch element Q2 connects the anode of the unidirectional conducting element to the second end of the energy storage element L, so that the unidirectional conducting element is in a forward conducting state, and the energy storage element L-addressing switch element Q2-unidirectional conducting element-anode energy storage element C-ground forms a second charging loop; the reverse bias control signal is also used to turn on the reverse bias switch element Q3 when the anode addressing signal turns off the anode addressing switch element Q2, and the reverse bias switch element Q3 connects the first end of the unidirectional conducting element to ground, so that the unidirectional conducting element is in a reverse bias state, prohibiting current from flowing through the anode addressing switch element Q2, and improving the isolation of the anode addressing switch circuit 121.

[0115] In this embodiment, when the laser LDxy is selected to emit light, in the charging stage of the anode energy storage element C, the anode address selection switch element Q2 is turned on when the anode address selection signal is enabled, the unidirectional conducting element is in a forward conducting state, and the energy temporary storage element L-anode address selection switch element Q2-unidirectional conducting element-anode energy storage element C-form a second charging loop, and the current output by the energy temporary storage element L flows to the anode energy storage element C via the unidirectional conducting element to charge the anode energy storage element C, and the anode energy storage element C uses its own stored energy to output current to drive the laser LDxy to emit light; when the laser LDxy is not selected to emit light, the anode address selection switch element Q2 is disconnected under the control of the anode address selection signal, and the reverse bias switch element Q3 is turned on when the reverse bias control signal is enabled, so that the unidirectional conducting element is in a reverse bias state, so as to prohibit the current from flowing through the anode address selection switch element Q2, and the laser LDxy that is not selected to emit light will not be crosstalked by the electrical signals of other lasers that are selected to emit light.

[0116] Preferably, in an exemplary embodiment, referring to Fig. 9 and Fig.11As shown, the unidirectional conducting element is the fourth diode D4; the reverse bias switch element Q3 is the third NMOS tube; the anode of the fourth diode D4 is connected to the source of the second NMOS tube and the drain of the third NMOS tube, and the cathode is connected to the first end of the anode energy storage element C; the source of the third NMOS tube is grounded; the gate of the third NMOS tube is connected to the reverse bias control signal; when the laser LDxy is selected to emit light, in the charging stage of the anode energy storage element C, the anode address switch element Q2 is turned on under the enablement of the anode address signal, and the output current of the energy temporary storage element L flows to the cathode of the fourth diode D4 through the anode of the fourth diode D4, and the fourth diode D4 is in a forward conduction state; when the laser LDxy is not selected to emit light, the anode address switch element Q2 is disconnected under the control of the anode address signal, the reverse bias switch element Q3 is turned on under the enablement of the reverse bias control signal, the anode of the fourth diode D4 is grounded through the reverse bias switch element Q3, and the fourth diode D4 is in a reverse bias state.

[0117] Further, when the anode addressing signal enables the anode addressing switch element Q2 to be turned on, the anode addressing signal is at a high level higher than the ground voltage, and when the anode addressing signal turns off the anode addressing switch element Q2, the anode addressing signal is at a low level lower than or equal to the ground voltage.

[0118] Preferably, in another exemplary solution, the unidirectional conducting element is a fourth NMOS tube; the reverse bias switch element Q3 is a third NMOS tube; the source of the fourth NMOS tube is connected to the source of the second NMOS tube and the drain of the third NMOS tube, the drain is connected to the first end of the anode energy storage element C, and the gate is connected to the addressing enable end of the anode addressing switch element Q2; when the laser LDxy is selected to emit light, in the charging stage of the anode energy storage element, the anode addressing switch element Q2 and the fourth NMOS tube are turned on when the anode addressing signal is enabled, and the output current of the energy temporary storage element L flows to the drain of the fourth NMOS tube through the source of the fourth NMOS tube, and the fourth NMOS tube is in a forward conduction state; when the laser LDxy is not selected to emit light, the anode addressing switch element Q2 and the fourth NMOS tube are disconnected under the control of the anode addressing signal, the reverse bias switch element Q3 is turned on when the reverse bias control signal is enabled, the source of the fourth NMOS tube is grounded through the reverse bias switch element Q3, and the fourth NMOS tube is in a reverse biased state.

[0119] Further, when the anode addressing signal enables turning on the anode addressing switch element Q2 and the fourth NMOS tube, the anode addressing signal is a high level higher than the ground voltage; when the anode addressing signal disconnects the anode addressing switch element Q2 and the fourth NMOS tube, the anode addressing signal is a low level lower than or equal to the ground voltage.

[0120] In this embodiment, when the laser LDxy stops emitting light, there is usually residual energy in the anode energy storage element C. The residual energy in the anode energy storage element C may damage other components and also affect the next energy storage of the anode energy storage element C.

[0121] In order to solve the problem that residual energy exists in the anode energy storage element C in the anode addressing drive circuit 120, and the residual energy causes damage to other components and affects the next energy storage of the anode energy storage element C. The anode addressing drive circuit 120 provided in the embodiment of the present application also includes an anode energy release switch circuit 123, and the anode energy release switch circuit 123 includes an energy release switch element Q8; the energy release switch element Q8 includes a first end, a second end and an energy release enable end, the first end of the energy release switch element Q8 is connected to the first end of the anode energy storage element C, the second end is grounded, and the energy release enable end is connected to an energy release control signal, and the energy release control signal is opposite to the state of the anode addressing signal; specifically, when the anode addressing signal is high, the energy release control signal is low; when the anode addressing signal is low, the energy release control signal is high; the energy release control signal is used to turn on the anode addressing switch element Q2 when the anode addressing signal When the anode selection signal is used, the energy release switch element Q8 is turned off, and the anode selection switch element Q2 connects the second end of the unidirectional conducting element to the second end of the energy storage element L, so that the unidirectional conducting element is in the forward conducting state, and the energy storage element L-anode selection switch element Q2-unidirectional conducting element-anode energy storage element C-ground forms a second energy charging circuit; the energy release control signal is also used to turn on the energy release switch element Q8 when the anode selection signal disconnects the anode selection switch element Q2, and the energy release switch element Q8 connects the second end of the anode energy storage element C to the ground, and the anode energy storage element C-energy release switch element Q8-ground forms an energy release circuit to discharge the residual energy in the anode energy storage element C.

[0122] Preferably, in an exemplary scheme, the energy release switch element Q8 is an eighth NMOS tube; the drain of the fourth NMOS tube is connected to the first end of the anode energy storage element C as the first end of the energy release switch element Q8, the source of the fourth NMOS tube is grounded as the second end of the energy release switch element Q8, and the gate is connected to the energy release control signal as the energy release enable terminal of the energy release switch element Q8; when the laser LDxy is selected to emit light, in the charging stage of the anode energy storage element C, the anode address selection switch element Q2 is turned on when the anode address selection signal is enabled, and the output current of the energy temporary storage element L flows to the anode energy storage element C through the unidirectional conductive element; when the laser LDxy is not selected to emit light, the anode address selection switch element Q2 is disconnected under the control of the anode address selection signal, the energy release switch element Q8 is turned on when the energy release control signal is enabled, and the first end of the anode energy storage element C is grounded through the energy release switch element Q8 to discharge the residual energy in the anode energy storage element C.

[0123] Furthermore, when the residual energy in the anode energy storage element is discharged through the energy release circuit, a large discharged current may affect the energy release switch element Q8, causing damage to the energy release switch element Q8. In order to solve this problem. The anode energy release current provided in the present application also includes a first current limiting element R1 to limit the current when the anode energy storage element releases energy, so as to reduce the possibility of damage to the energy release switch element Q8 when the anode energy storage element C releases energy.

[0124] Specifically, the first end of the first current limiting element R1 is connected to the first end of the energy release switch element Q8, and the second end is connected to the first end of the anode energy storage element C. When the energy release switch element Q8 is turned on when the energy release control signal is enabled, an energy release loop is formed by the anode energy storage element C-the first current limiting element R1-the energy release switch element Q8.

[0125] It is understandable that the greater the resistance of the first current limiting element R1, the stronger the current limiting capability of the first current limiting element R1 on the current when the anode energy storage element C releases energy, and the greater the voltage drop across the first current limiting element R1. Of course, in the present application, the specific resistance of the first current limiting element R1 is not limited, and can be reasonably set according to actual needs.

[0126] Further, in the embodiment of the present application, in order to more conveniently control the anode addressing switch element Q2, the reverse bias switch element Q3 and the energy release switch element Q8, the anode addressing drive circuit 120 further includes an inverter I, the first end of the inverter I is connected to the addressing enable end, and the second end of the inverter I is connected to the reverse bias enable end and the energy release enable end. Specifically, the input end of the inverter I is connected to the addressing enable end of the anode addressing switch element Q2, and the output end is connected to the reverse bias enable end of the reverse bias switch element Q3 and the energy release enable end of the energy release switch element Q8, so that the conduction states of the reverse bias switch element Q3 and the energy release switch element Q8 are the same, and opposite to the conduction state of the anode addressing switch element Q2.

[0127] In some other embodiments, the anode addressing driving circuit includes a reverse biased inverter and an energy release inverter, wherein the input end of the reverse biased inverter is connected to the addressing enable end of the anode addressing switch element Q2, and the output end is connected to the reverse biased enable end of the reverse biased switch element Q3; the input end of the energy release inverter is connected to the addressing enable end of the anode addressing switch element Q2, and the output end is connected to the energy release enable end of the energy release switch element Q8, so that the conduction states of the reverse biased switch element Q3 and the energy release switch element Q8 are the same, and opposite to the conduction state of the anode addressing switch element Q2.

[0128] Of course, in some other embodiments, the input end of the inverter can be connected to the reverse bias enable end of the reverse bias switch element Q3 and the energy release enable end of the energy release switch element Q8, and the output end is connected to the address enable end of the anode address switch element Q2. At this time, the conduction state of the reverse bias switch element Q3 and the energy release switch element Q8 can also be the same, and opposite to the conduction state of the anode address switch element.

[0129] In this embodiment, the laser emission circuit concentrates the anode addressable driving circuit and the cathode addressable driving circuit on one side of the two-dimensional laser array, which can increase the reliability capabilities of the two-dimensional laser array (such as the resolution of m×n) such as the voltage resistance and current flow performance, electrostatic protection performance, etc.

[0130] At the same time, since the anode addressable driving circuit is connected to the anodes of the lasers in the same row through the common anode terminal and is connected to the cathodes of the lasers in the same column through the common cathode terminal, the number of channels of the two-dimensional laser array can be reduced, thereby saving the manufacturing cost of the laser emission circuit.

[0131] In this embodiment, the process of the laser array addressable driving circuit performing address selection driving on the laser array is as follows:

[0132] In the first stage, the charging control signal controls the charging switch element Q1 to be turned on. The anode addressing signal controls the anode switch circuit 110 to be turned off, more specifically, the anode switch circuit 110 is in a reverse bias state. The cathode addressing signal controls the cathode switch circuit to be turned off.

[0133] The energy storage element L stores electric energy using the current output by the transmitting power source E. The charging control signal controls the conduction time of the charging switch element Q1 and adjusts the electric energy value stored in the energy storage element L according to the actual optical power required by the laser.

[0134] In the second stage, the charging switch element Q1 in the charging circuit 110 with adjustable energy storage is turned off, and the energy temporary storage element L stops storing energy. The anode addressing signal controls the anode addressing switch element Q2 in the row where the laser selected to emit light is located to turn on. More specifically, the anode switch circuit 110 is in a forward conduction state. The cathode addressing signal controls the cathode addressing switch in the column where the laser selected to emit light is located to turn off.

[0135] The unidirectional conducting element is in a forward conducting state, and the energy storage element L outputs current to charge the capacitor element C.

[0136] In the third stage, the cathode addressing signal controls the cathode addressing switch in the column where the laser selected to emit light is located to turn on.

[0137] The output current of the capacitor element C drives the laser selected to emit light.

[0138] When the laser currently selected to emit light finishes emitting light, the anode addressing signal controls the anode addressing switch element Q2 corresponding to the row where the laser is located to be disconnected, the reverse bias control signal controls the reverse bias switch element Q3 corresponding to the row where the laser is located to be turned on, and the energy release control signal controls the energy release switch element Q8 corresponding to the row where the laser is located to be turned on.

[0139] The unidirectional conducting element is in a reverse bias state, and the energy storage element L stops outputting current to charge the capacitor element C. The anode energy release switch circuit 123 discharges the residual energy on the capacitor element C.

[0140] Furthermore, when multiple rows of anode addressing drive circuits corresponding to multiple lasers are enabled and turned on by anode addressing signals, and multiple columns of cathode addressing drive circuits corresponding to the multiple lasers are enabled and turned on by cathode addressing signals, multiple lasers can emit light simultaneously.

[0141] In addition, the anode addressing signal can also simultaneously drive two or more anode addressing switch elements Q2 corresponding to the common anode terminals to conduct, and the cathode addressing signal can also simultaneously drive two or more cathode addressing switch elements corresponding to the common cathode terminals to conduct, so as to realize that two or more lasers emit light at the same time. As for the specific number of lasers that emit light at the same time, it can be achieved by setting the scanning method of the anode addressing signal and the cathode addressing signal according to actual needs.

[0142] In another exemplary embodiment, the anode addressing switch element Q2 is a second PMOS tube, the drain of the second PMOS tube is connected to the energy storage element L as the first end of the anode addressing switch element Q2, the source of the second PMOS tube is connected to the anode energy storage circuit 122 as the second end of the anode addressing switch element Q2, and the gate of the second PMOS tube is connected to the anode addressing signal as the addressing enable terminal of the anode addressing switch element Q2; the second PMOS tube is turned on or off under the control of the anode addressing signal.

[0143] Among them, the VGS voltage condition when the anode addressing signal drives the second PMOS tube to turn on is opposite to the VGS voltage condition when the anode addressing signal drives the second NMOS tube to turn on, VGS=VG-VS, VG is the gate voltage of the MOS tube (the second NMOS tube or the second PMOS tube), and VS is the source voltage of the MOS tube (the second NMOS tube or the second PMOS tube); for example, the condition for the second NMOS tube to turn on is that the VGS≥Vth of the second NMOS tube, at this time, the anode addressing signal when the second NMOS tube is turned on is a high level, and the anode addressing signal when the second NMOS tube is turned off is a low level; the condition for the second PMOS tube to turn on is that the VGS≤Vth of the second PMOS tube, at this time, the anode addressing signal when the second PMOS tube is turned on is a low level, and the anode addressing signal when the second PMOS tube is turned off is a high level.

[0144] In an exemplary solution, the anode reverse bias switch element Q3 is a third NMOS tube, and the anode unidirectional conduction element is a fourth NMOS tube; the drain of the second PMOS tube is connected to the energy temporary storage element L as the first end of the anode address switch element Q2, the source of the second PMOS tube is connected to the source of the fourth NMOS tube and the drain of the third NMOS tube as the second end of the anode address switch element Q2, and the gate of the second PMOS tube is connected to the gate of the fourth NMOS tube through a second anode inverter; the source of the third NMOS tube is grounded, and the gate of the third NMOS tube is connected to the gate of the second NMOS tube; when the laser LDxy is selected to emit light, In the charging stage of the anode energy storage element C, the second PMOS tube is enabled by the anode addressing signal, the fourth NMOS tube is turned on under the control of the inverted anode addressing signal, the third NMOS tube is disconnected under the control of the anode reverse bias control signal, the source of the fourth NMOS tube is connected to the energy temporary storage element L through the second PMOS tube, and the fourth NMOS tube is in a forward conduction state; when the laser LDxy stops being selected to emit light, the second PMOS tube is disconnected under the control of the anode addressing signal, the third NMOS tube is turned on under the enablement of the anode reverse bias control signal, the source of the fourth NMOS tube is grounded through the third NMOS tube, and the fourth NMOS tube is in a reverse bias state.

[0145] At this time, when the anode addressing signal enables the second PMOS tube to be turned on, the anode addressing signal is a low level less than the anode drive level, and when the anode addressing signal controls the second PMOS tube to be turned off, the anode addressing signal is a high level greater than the anode drive level.

[0146] Specifically, the anode address switch circuit 121 also includes a second anode inverter, the input end of the second anode inverter is connected to the gate of the second PMOS tube, and the output end is connected to the gate of the fourth NMOS tube, so that the state of the fourth NMOS tube is the same as that of the second PMOS tube.

[0147] Of course, in some other embodiments, the input end of the second anode inverter can be connected to the gate of the fourth NMOS tube, and the output end can be connected to the gate of the second PMOS tube. In this case, the fourth NMOS tube and the second PMOS tube can also be in the same state.

[0148] When the anode address selection signal and the anode reverse bias control signal are both at low levels, the anode address selection signal controls the second PMOS tube to be turned on, the inverted anode address selection signal (high level) controls the fourth NMOS tube to be turned on, the anode reverse bias control signal controls the third NMOS tube to be turned off, and the second PMOS tube connects the source of the fourth NMOS tube to the energy temporary storage element L, so that the fourth NMOS tube is in a forward conduction state; when the anode address selection signal and the anode reverse bias control signal are both at high levels, the anode address selection signal controls the second PMOS tube to be turned off, the anode reverse bias control signal controls the third NMOS tube to be turned on, and the third NMOS tube connects the source of the fourth NMOS tube to ground, so that the fourth NMOS tube is in a reverse bias state.

[0149] In another exemplary solution of the present embodiment, the anode reverse bias switch element Q3 is a third NMOS tube, and the anode unidirectional conduction element is a fourth diode D4; the drain of the second PMOS tube is connected to the energy temporary storage element L as the first end of the anode address switch element Q2, the source of the second PMOS tube is connected to the anode of the fourth diode D4 and the drain of the third NMOS tube as the second end of the anode address switch element Q2, and the gate of the second PMOS tube is connected to the anode address signal; the source of the third NMOS tube is grounded, and the gate of the third NMOS tube is connected to the gate of the second PMOS tube; when the laser LDxy is When light emission is selected, in the charging stage of the anode energy storage element C, the second PMOS tube is enabled by the anode addressing signal, the third NMOS tube is disconnected under the control of the anode reverse bias control signal, the anode of the fourth diode D4 is connected to the energy temporary storage element L through the second PMOS tube, and the fourth diode D4 is in a forward conduction state; when the laser LDxy stops being selected to emit light, the second PMOS tube is disconnected under the control of the anode addressing signal, the third NMOS tube is turned on under the enablement of the anode reverse bias control signal, the anode of the fourth diode D4 is grounded through the third NMOS tube, and the fourth diode D4 is in a reverse bias state.

[0150] At this time, when the anode addressing signal enables the second PMOS tube to be turned on, the anode addressing signal is a low level less than or equal to the anode drive level, and when the anode addressing signal controls the second PMOS tube to be turned off, the anode addressing signal is a high level greater than the anode drive level.

[0151] When the anode address selection signal and the anode reverse bias control signal are both at low levels, the anode address selection signal controls the second PMOS tube to be turned on, the anode reverse bias control signal controls the third NMOS tube to be turned off, and the second PMOS tube connects the anode of the fourth diode D4 to the energy temporary storage element L, so that the fourth diode D4 is in a forward conduction state; when the anode address selection signal and the anode reverse bias control signal are both at high levels, the anode address selection signal controls the second PMOS tube to be turned off, the anode reverse bias control signal controls the third NMOS tube to be turned on, and the third NMOS tube connects the anode of the fourth diode D4 to the ground, so that the fourth diode D4 is in a reverse bias state.

[0152] When the anode selection switch element Q2 is disconnected, the anode selection switch circuit 121 provided in the embodiment of the present application utilizes the anode unidirectional conducting element to be in a reverse biased state to prohibit current from flowing through the anode selection switch element Q2, thereby improving the isolation of the anode selection switch circuit 121 and stopping the laser LDxy selected to emit light from being crosstalked by the electrical signals of other lasers selected to emit light.

[0153] Fig.12 It is a circuit diagram of another anode addressing driving circuit shown in an embodiment of the present application.

[0154] like Fig.12 As shown, the anode energy storage circuit 122 also includes a second current limiting element R2, a first end of the second current limiting element R2 is connected to the second end of the anode site selection switch element Q2, and a second end is connected to the first end of the anode energy storage element C and the anode of the laser LDxy. The second current limiting element R2 is used to limit the charging current when the energy storage element L charges the anode energy storage element C, so that the charging current is less than the current threshold at which the laser LDxy can emit light, thereby avoiding the laser LDxy from leaking light and emitting light by mistake when the transmitting power source E charges the anode energy storage circuit due to parallel parasitic capacitance.

[0155] Since the cathode addressing switch element in the cathode addressing switch circuit has a parallel parasitic capacitance, when the energy storage element charges the anode energy storage element C, there are two loops, loop one: the second charging loop formed by the energy storage element L-anode addressing switch element Q2-unidirectional conductive element-anode energy storage element-ground, loop two: the current loop formed by the energy storage element L-anode addressing switch element Q2-unidirectional conductive element-laser LD-parasitic capacitance of the cathode addressing switch element-ground.

[0156] At this time, the laser is connected in series with the parasitic capacitance of the cathode addressing switch element, so the charging current value of the parasitic capacitance of the cathode addressing switch element is equal to the current value flowing through the laser. Once the charging current value of the parasitic capacitance flowing through the cathode addressing switch element is greater than the light-emitting current threshold of the laser, the laser will be stimulated and emit light by mistake during the process of the energy storage element L charging the anode energy storage element (at this time, the cathode addressing switch element is not turned on, and theoretically it will not emit light). The embodiment provided by the present application sets a second current limiting element R2 in the anode energy storage circuit to limit the charging current of the parasitic capacitance of the cathode addressing switch element when the anode addressing drive circuit 120 is turned on, so that the charging current of the parasitic capacitance of the cathode addressing switch element is less than the light-emitting current threshold of the laser, so that the laser will not emit light by mistake during the charging stage of the anode energy storage element.

[0157] It is understandable that the greater the resistance of the second current limiting element R2, the stronger the current limiting ability of the second current limiting element R2 to the anode energy storage element, and the greater the voltage drop across the second current limiting element R2. Of course, in this application, the specific resistance of the second current limiting element R2 is not limited and can be reasonably set according to actual needs.

[0158] Fig.13 is a circuit diagram of another anode addressable driving circuit 100 shown in an embodiment of the present application.

[0159] like Fig.13 As shown, there are multiple charging circuits 110 with adjustable energy storage, and each charging circuit 110 with adjustable energy storage is connected to an anode addressing driving circuit in a one-to-one correspondence. At this time, the main control unit 420 outputs a one-to-one corresponding charging control signal to the multiple charging circuits 110 with adjustable energy storage; the multiple charging circuits 110 with adjustable energy storage adjust the stored electric energy under the control of the one-to-one corresponding charging control signal, so that the optical power of the selected laser is equal to the target optical power.

[0160] In this embodiment, the cathode addressing drive circuit 220 includes a cathode addressing switch circuit, one end of which is connected to the cathode of the laser, and the other end is grounded; specifically, the cathode addressing switch circuit includes a cathode addressing switch element, and the cathode addressing switch element includes a first end, a second end and an addressing enable end. The first end of the cathode addressing switch element is connected to the cathode of the laser, the second end is grounded, and the addressing enable end is connected to a cathode addressing signal. The cathode addressing switch element is turned on or off under the control of the cathode addressing signal.

[0161] In this embodiment, the cathode addressing switch element is an NMOS tube, the drain of the NMOS tube is connected to the cathode of the laser as the first end of the cathode addressing switch element, the source is grounded as the second end of the cathode addressing switch element, and the gate is connected to the cathode addressing signal as the addressing enable terminal of the cathode addressing switch element. In some embodiments, in order to facilitate the adjustment of the electric energy stored in the charging circuit 110 with adjustable energy storage by digital signals, the i-th charging control signal is a pulse signal, and the conduction time of the charging switch element Q1 is related to the pulse width of the i-th charging control signal.

[0162] Accordingly, the mapping relationship constructed by the main control unit 420 is a mapping relationship between the pulse width of the i-th laser and the i-th charging control signal, and the electronic device obtains the i-th charging control signal corresponding to the i-th laser based on the pulse width of the i-th charging control signal, so that the i-th optical power is equal to the target optical power. For example, the above mapping relationship exists between the i-th laser identifier and the pulse width (or pulse width identifier).

[0163] In addition, the main control unit 420 can also be used to generate a pulse parameter configuration table according to the mapping relationship and the pulse width, and the above electronic device generates an i-th control signal corresponding to the i-th laser based on the pulse parameter configuration table, so that the i-th optical power is equal to the target optical power. For example, the above mapping relationship exists between the i-th laser identifier and the i-th control signal identifier.

[0164] In some embodiments, it is considered that the rated optical power and other optoelectronic parameters of the laser may change. For example, the optical power of a semiconductor laser may gradually decrease with the increase of the use time due to aging and other reasons. In addition, the optical power change rules of different lasers may be different, which may cause the optical power uniformity of the calibrated laser array to deteriorate. Therefore, it is necessary to take corresponding measures for the laser array, etc. to improve the above problems.

[0165] In this embodiment, the above mapping relationship or pulse parameter configuration table can be updated by periodic automatic triggering or manual triggering, so as to at least partially solve the above problem. Specifically, when the i-th optical power is not equal to the target optical power, the i-th laser obtains the adjusted i-th control signal until the i-th optical power is equal to the target optical power. The main control unit updates the mapping relationship according to the adjusted i-th control signal.

[0166] Among them, whether the i-th optical power is equal to the target optical power can be directly collected by using an independently set optical power meter to compare with the target optical power. In addition, a photosensitive sensor integrated in the laser array can also be used to automatically collect the optical power of each laser according to a preset period, so as to compare with the target optical power.

[0167] In order to update the mapping relationship according to the real-time optical power of the laser, the embodiment of the present application further provides an electronic device;

[0168] Fig.14 is another block diagram of an electronic device according to an embodiment of the present application. Fig.14 At this time, the electronic device 400 includes not only the laser emitting circuit 410 and the main control unit 420, but also a detection unit 430; the laser emitting circuit 410 includes a two-dimensional laser array composed of N lasers and an addressable driving circuit for the laser array; the addressable driving circuit for the laser array is externally connected to a selection driving signal, and multiple lasers in the laser array are selected and driven to emit light by scanning; the main control unit 420 is configured with the mapping relationship provided by the calibration device 300 as described above, and generates a control signal corresponding to the N lasers one by one according to the mapping relationship; the N lasers can achieve optical power equal to the target optical power under the control of the above-mentioned one-to-one corresponding control signal; the detection unit 430 is used to detect the current optical power of the i-th laser, and send the detection result to the main control unit 420.

[0169] Wherein, the current optical power is the optical power of the i-th laser when it emits light under the control of the current i-th control signal, and N≥i≥1. Accordingly, the main control unit 420 is also used to adjust the i-th control signal according to the detection result of the detection unit 430 when the current optical power of the i-th laser is not equal to the target optical power, so that when the i-th laser emits light under the control of the adjusted i-th control signal, the i-th optical power is equal to the target optical power; the main control unit 420 then updates the mapping relationship according to the adjusted i-th control signal.

[0170] Specifically, the detection unit 430 may be an optical power meter, which is used to collect light emitted by a laser and further detect the optical power when the laser emits light.

[0171] Specifically, the main control unit 420 is used to send a one-to-one corresponding charging control signal to the charging circuit with adjustable energy storage in a time-sharing manner to ensure that the light emitting power of each laser in the two-dimensional laser array is equal to the target power.

[0172] In another exemplary solution, a pulse parameter configuration table is stored in the main control unit 420, and the pulse parameter configuration table stores pulse widths that determine multiple charging control signals. The main control unit 420 is used to configure the pulse width of the charging control signal according to the parameter configuration table to output a charging control signal that corresponds to the laser one by one; the main control unit 420 is also used to adjust the i-th control signal according to the detection result of the detection unit 430, so that when the i-th laser emits light under the control of the adjusted i-th control signal, the i-th optical power is equal to the target optical power; the main control unit 420 then updates the parameter configuration table according to the adjusted i-th control signal.

[0173] In order to achieve adaptive adjustment of the optical power of multiple lasers in a laser array. The present application also provides another electronic device; see Fig.15 At this time, the electronic device 400 includes not only the laser emitting circuit 410 and the main control unit 420, but also the detection unit 430; the laser emitting circuit 410 includes a two-dimensional laser array composed of N lasers and a laser array addressable driving circuit; the laser array addressable driving circuit includes an anode addressable driving circuit 100 and a cathode addressable driving circuit 200, the anode addressable driving circuit 100 includes the above-mentioned energy storage adjustable charging circuit 110 and multiple anode addressing driving circuits 120; the cathode addressable driving circuit includes multiple cathode addressing driving circuits 220; the multiple anode addressing driving circuits 120 are respectively connected to the multiple common anode terminals corresponding to the multiple rows of lasers in a one-to-one correspondence, and the multiple anode addressing driving circuits 120 are connected in a scanning manner through an external anode addressing signal. Anodes of multiple rows of lasers are driven by anode addressing; multiple cathode addressing drive circuits 220 are connected one-to-one with multiple common cathode terminals corresponding to multiple columns of lasers, and multiple cathode addressing drive circuits 220 perform cathode addressing drive on cathodes of multiple columns of lasers in the laser array in a scanning manner through external cathode addressing signals; the detection unit 430 is used to detect the current optical power of the i-th laser and send the detection result to the main control unit 420; the main control unit 420 adjusts the charging control signal sent to the charging circuit 110 with adjustable energy storage according to the detection result of the detection unit 430, so that the charging circuit 110 with adjustable energy storage provides one-to-one corresponding energy storage values ​​to multiple lasers in the laser array, thereby making the optical powers of multiple lasers in the laser array equal to the target optical power.

[0174] Among them, the current optical power is the optical power when the i-th laser is selected to emit light. At this time, the charging circuit 110 with adjustable energy storage stores the i-th electrical energy for the i-th laser to emit light under the control of the i-th charging control signal, N≥i≥1, so that the i-th optical power is equal to the target optical power.

[0175] On the other hand, the present application also provides a calibration method, which is applied to a laser emitting circuit, which uses N lasers to emit light, and the light emission power of the N lasers is determined by their respective control signals; the calibration method provided by the present application can pre-calibrate the control signals of the N lasers to improve the uniformity of the laser's optical power.

[0176] See also Fig.16 In an exemplary embodiment, the calibration method may include:

[0177] S110, detecting the optical power of the i-th laser; wherein i=1, 2...N.

[0178] S120, adjusting the i-th control signal according to the detection result so that the i-th optical power is equal to the target optical power; wherein the i-th control signal is used to control the optical power when the i-th laser emits light; the i-th optical power is the optical power when the i-th laser emits light.

[0179] S130, when the i-th optical power is equal to the target optical power, construct a mapping relationship between the i-th laser and the i-th control signal.

[0180] Furthermore, in an exemplary embodiment, the laser emission circuit includes at least one charging circuit 110 with adjustable energy storage, and N lasers emit light using the electric energy provided by the charging circuit 110 with adjustable energy storage. The energy storage value of the charging circuit 110 with adjustable energy storage determines the emission optical power of the laser, and the calibration method adjusts the energy storage value of the charging circuit 110 with adjustable energy storage corresponding to the emission of N lasers, so that the optical power of the N lasers is equal to the target optical power.

[0181] In this embodiment, the energy storage value of the charging circuit 110 with adjustable energy storage is controlled by a charging control signal. By adjusting the charging control signal, the optical power of a certain laser can be adjusted. The calibration method provided in this application can pre-calibrate the charging control signals corresponding to N lasers to improve the uniformity of the optical power of the laser.

[0182] Correspondingly, step S120 is to adjust the i-th charging control signal according to the detection result so that the i-th optical power is equal to the target optical power; wherein the i-th charging control signal is used to control the charging circuit 110 with adjustable energy storage to store the i-th electrical energy when the i-th laser is selected to emit light so that the i-th optical power is equal to the target optical power; step S130 is to construct a mapping relationship between the i-th laser and the i-th charging control signal when the i-th optical power is equal to the target optical power.

[0183] In some embodiments, the charging circuit with adjustable energy storage includes a charging switch element Q1. Accordingly, adjusting the initial control signal so that the i-th optical power output by the i-th laser approaches the target optical power may include: adjusting the initial control signal to change the conduction duration of the charging switch element Q1, so that the charging circuit with adjustable energy storage stores the i-th electrical energy, and the optical power of the i-th laser driven by the i-th electrical energy approaches the target optical power. In this way, the electrical energy stored in the charging circuit with adjustable energy storage can be controlled by controlling the conduction duration of the charging switch element Q1.

[0184] In some embodiments, the energy values ​​of the initial electric energy and the i-th electric energy are respectively positively correlated with the on-time of the charging switch element Q1 .

[0185] In some embodiments, the initial control signal and the i-th control signal are pulse signals respectively, and the pulse width of the pulse signal is positively correlated with the conduction time of the charging switch element Q1 .

[0186] In some embodiments, after constructing the mapping relationship between the i-th laser and the i-th control signal, the calibration method may further include: generating a pulse parameter configuration table based on the mapping relationship and the pulse width, so as to determine the i-th control signal corresponding to the i-th laser based on the pulse parameter configuration table. This facilitates determining the i-th control signal or the i-th charging control signal corresponding to the i-th laser based on the pulse parameter configuration table.

[0187] See also Fig.17 Accordingly, the laser emission method based on the above calibration method includes the following steps:

[0188] S210, according to the mapping relationship provided by the above calibration method, obtaining the i-th control signal corresponding to the i-th laser one by one.

[0189] S220, controlling the one-to-one corresponding i-th laser by using the i-th control signal, so that the optical power of the i-th laser when emitting light is equal to the target optical power.

[0190] Specifically, in an exemplary embodiment, the laser emission circuit includes at least one charging circuit 110 with adjustable energy storage, and N lasers emit light using the electric energy provided by the charging circuit 110 with adjustable energy storage. The energy storage value of the charging circuit 110 with adjustable energy storage determines the emission optical power of the laser, and the above laser emission method pre-sets the energy storage value of the charging circuit 110 with adjustable energy storage corresponding to the emission of N lasers, so that the optical power of the N lasers is equal to the target optical power.

[0191] In this embodiment, the energy storage value of the charging circuit 110 with adjustable energy storage is controlled by a charging control signal. By setting the charging control signal, the optical power setting of a certain laser can be achieved; the laser emission method provided in this application can pre-store the charging control signals corresponding to N lasers according to the above-mentioned calibration method to improve the uniformity of the optical power of the laser.

[0192] Correspondingly, step S210 is to obtain the i-th charging control signal corresponding to the i-th laser according to the mapping relationship provided by the above-mentioned calibration method; wherein the i-th charging control signal is used to control the charging circuit 110 with adjustable energy storage to store the i-th electrical energy when the i-th laser is selected to emit light, so that the i-th optical power is equal to the target optical power; step S220 is to control the charging circuit 110 with adjustable energy storage to store the i-th electrical energy through the i-th charging control signal, and the i-th electrical energy drives the i-th laser corresponding to the i-th laser to emit light, so that the optical power when the i-th laser emits light is equal to the target optical power.

[0193] In some embodiments, determining the ith control signal corresponding to the ith laser based on the mapping relationship may include the following operations: First, determining the pulse parameters corresponding to the ith laser based on the pulse parameter configuration table, wherein the pulse parameter configuration table includes the correspondence between the ith laser and the pulse parameters. Then, generating the ith control signal based on the pulse parameters.

[0194] In some embodiments, controlling the optical power of the i-th laser based on the i-th control signal includes: sending the i-th control signal to the charging circuit with adjustable energy storage one by one in time-sharing, so that the charging circuit with adjustable energy storage stores the i-th electrical energy to output the i-th electrical energy to the i-th laser, so that the i-th laser outputs the i-th optical power. In this way, time-sharing one-to-one control can be achieved.

[0195] In some embodiments, this embodiment can also realize adaptive adjustment of the light emitting power. Specifically, the method for controlling the light emitting power can include the following operations.

[0196] First, the current optical power of the i-th laser is determined, where the current optical power is the optical power of the emitted light of the i-th laser corresponding to the current control signal, and N≥i≥1.

[0197] Then, the current optical power is compared with the target optical power to obtain the optical power difference.

[0198] Next, an i-th control signal corresponding to the i-th laser is determined based on the optical power difference.

[0199] Then, the i-th laser is controlled to emit the i-th optical power based on the i-th control signal.

[0200] Among them, the i-th control signal is the same as or different from the current control signal, the second optical power uniformity is better than or equal to the first optical power uniformity, the first optical power uniformity is the optical power uniformity of the current optical power of each of the N lasers, and the second optical power uniformity is the optical power uniformity of the i-th optical power of each of the N lasers.

[0201] In some embodiments, the current control signal is a current charging control signal, and the i-th control signal is an i-th charging control signal.

[0202] Correspondingly, the current charging control signal is used to control the charging circuit with adjustable energy storage to store the current electrical energy, so as to output the current electrical energy to the i-th laser, so that the i-th laser outputs the current optical power. The i-th control signal is used to control the charging circuit with adjustable energy storage to store the i-th electrical energy, so as to output the i-th electrical energy to the i-th laser, so that the i-th optical power output by the i-th laser is equal to the target optical power.

[0203] In an exemplary solution, the electronic device may be a laser radar; the laser radar generates laser through the laser emitting circuit and emits the laser toward the detection area, and then cooperates with the laser receiving device in the laser radar to receive the echo light beam reflected from the target. The signal processing system then processes the data appropriately to obtain information such as the distance, speed, direction, posture and even shape of the target, which can then be applied to navigation avoidance, obstacle recognition, ranging, speed measurement, automatic driving and other scenarios for products such as automobiles, robots, logistics vehicles and inspection vehicles.

[0204] Another aspect of the present application also provides an electronic device. The electronic device may include a memory and a processor. In addition, multiple lasers may be provided on the electronic device. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The memory may include various types of storage units, such as system memory, read-only memory (ROM) and permanent storage devices. An executable program is stored on the memory, and when the executable program is processed by the processor, the processor may execute at least part of the above method.

[0205] In addition, the method according to the present application can also be implemented as a computer program or a computer program product, which includes computer program code instructions for executing some or all of the steps in the above method of the present application. Alternatively, the present application can also be implemented as a computer-readable storage medium (or a non-transitory machine-readable storage medium or a machine-readable storage medium) on which an executable program (or a computer program or a computer instruction code) is stored, and when the executable program is executed by a processor of an electronic device (or a server, etc.), the processor executes part or all of the steps of the above method according to the present application.

[0206] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A calibration device, characterized in that: Applicable to an electronic device including a laser emitting circuit, wherein the laser emitting circuit includes N lasers, where N is a positive integer and N is greater than or equal to 2, the calibration device includes: A detection module, used for detecting the optical power of the i-th laser; A control module, used for adjusting the i-th control signal according to the detection result of the detection module so that the i-th optical power is equal to the target optical power; wherein, N≥i≥1, the i-th control signal is used for controlling the optical power when the i-th laser emits light; the i-th optical power is the optical power when the i-th laser emits light; The control module is further used to construct a mapping relationship between the i-th laser and the i-th control signal when the i-th optical power is equal to the target optical power; The i-th control signal is a pulse signal, and the pulse width of the i-th control signal is used to adjust the magnitude of the i-th optical power; The laser emission circuit also includes an anode addressable driving circuit, which includes a charging circuit with adjustable energy storage and a plurality of anode addressing driving circuits, wherein the charging circuit with adjustable energy storage includes an energy temporary storage element, and each of the anode addressing driving circuits includes an anode addressing switch circuit and an anode energy storage circuit; When the anode addressing switch circuit corresponding to the i-th laser is turned on, the anode energy storage circuit corresponding to the i-th laser is charged by the electric energy stored in the energy temporary storage element, and drives the i-th laser to emit light by outputting current.

2. The calibration device according to claim 1, characterized in that: The N lasers emit light using electric energy provided by at least one of the charging circuits with adjustable energy storage; the i-th control signal is the i-th charging control signal, and the i-th charging control signal is used to control the charging circuit with adjustable energy storage to store the i-th electric energy; The i-th electrical energy is used to provide energy for the i-th laser to emit light; The control module adjusts the ith electric energy through the ith charging control signal so that the ith optical power is equal to the target optical power.

3. The calibration device according to claim 2, characterized in that: The charging circuit with adjustable energy storage further comprises a charging switch element; the charging switch element is connected between the transmitting power supply and the energy temporary storage element; when the charging switch element is turned on, the energy temporary storage element uses the transmitting power supply to store electric energy; The control module adjusts the conduction time of the charging switch element through the i-th charging control signal, and adjusts the value of the i-th electric energy so that the i-th optical power is equal to the target optical power.

4. The calibration device according to claim 3, characterized in that: The i-th charging control signal is a pulse signal, and the conduction time of the charging switch element is related to the pulse width of the i-th charging control signal; The mapping relationship constructed by the control module is a mapping relationship between the i-th laser and the pulse width of the i-th charging control signal, and the electronic device obtains the i-th charging control signal corresponding to the i-th laser one by one based on the pulse width of the i-th charging control signal, so that the i-th optical power is equal to the target optical power. And / or, the control module is also used to generate a pulse parameter configuration table according to the mapping relationship and the pulse width, and the electronic device generates the i-th control signal corresponding one-to-one to the i-th laser based on the pulse parameter configuration table, so that the i-th optical power is equal to the target optical power.

5. The calibration device according to any one of claims 2 to 4, characterized in that: The N lasers are arranged in an array; multiple lasers in the same row of the N lasers are connected via a common anode terminal, and multiple rows of lasers are connected to the charging circuit with adjustable energy storage via corresponding common anode terminals respectively; the charging circuit with adjustable energy storage is used to provide electrical energy for the selected emitting laser; The charging circuit with adjustable energy storage stores a one-to-one corresponding i-th electric energy for the i-th laser according to the mapping relationship, so that the i-th optical power is equal to the target optical power.

6. A laser emission circuit, characterized in that: The laser emitting circuit comprises N lasers, wherein the laser emitting circuit obtains the i-th control signal corresponding one-to-one to the i-th laser according to the mapping relationship provided by the calibration device according to any one of claims 1-5, so that the optical power of the i-th laser when emitting light is equal to the target optical power, N≥i≥1.

7. An electronic device, characterized in that: The electronic device comprises a laser emitting circuit, wherein the laser emitting circuit comprises N lasers; the electronic device further comprises a main control unit; the main control unit is configured with a mapping relationship; the mapping relationship is used for the laser emitting circuit to obtain an i-th control signal corresponding to the i-th laser one by one; wherein the i-th control signal is used to control the i-th laser to emit light, so that the i-th optical power of the i-th laser when emitting light is equal to the target optical power, and N≥i≥1; The i-th control signal is a pulse signal, and the pulse width of the i-th control signal is used to adjust the magnitude of the i-th optical power; The laser emission circuit also includes an anode addressable driving circuit, which includes a charging circuit with adjustable energy storage and a plurality of anode addressing driving circuits, wherein the charging circuit with adjustable energy storage includes an energy temporary storage element, and each of the anode addressing driving circuits includes an anode addressing switch circuit and an anode energy storage circuit; When the anode addressing switch circuit corresponding to the i-th laser is turned on, the anode energy storage circuit corresponding to the i-th laser is charged by the electric energy stored in the energy temporary storage element, and drives the i-th laser to emit light by outputting current.

8. The electronic device according to claim 7, characterized in that: The N lasers emit light using electric energy provided by at least one of the charging circuits with adjustable energy storage; the i-th control signal is the i-th charging control signal, and the i-th charging control signal is used to control the charging circuit with adjustable energy storage to store the i-th electric energy; The i-th electrical energy is used to provide energy for the i-th laser to emit light; The main control unit adjusts the ith electric energy through the ith charging control signal so that the ith optical power is equal to the target optical power.

9. The electronic device according to claim 8, characterized in that: The charging circuit with adjustable energy storage further comprises a charging switch element; the charging switch element is connected between the transmitting power supply and the energy temporary storage element; when the charging switch element is turned on, the energy temporary storage element uses the transmitting power supply to store electric energy; The main control unit adjusts the conduction time of the charging switch element through the i-th charging control signal, and adjusts the value of the i-th electric energy so that the i-th optical power is equal to the target optical power.

10. The electronic device according to claim 9, characterized in that: The i-th charging control signal is a pulse signal, and the conduction time of the charging switch element is related to the pulse width of the i-th charging control signal; The mapping relationship constructed by the main control unit is a mapping relationship between the pulse width of the i-th laser and the i-th charging control signal, and the electronic device obtains the i-th charging control signal corresponding to the i-th laser one-to-one based on the pulse width of the i-th charging control signal, so that the i-th optical power is equal to the target optical power, and / or the main control unit is also used to generate a pulse parameter configuration table according to the mapping relationship and the pulse width, and the electronic device generates the i-th control signal corresponding to the i-th laser one-to-one based on the pulse parameter configuration table, so that the i-th optical power is equal to the target optical power.

11. The electronic device according to claim 7, characterized in that: When the i-th optical power is not equal to the target optical power, the i-th laser obtains the adjusted i-th control signal until the i-th optical power is equal to the target optical power; The main control unit updates the mapping relationship according to the adjusted i-th control signal.

12. The electronic device according to claim 11, characterized in that: The electronic device further comprises: A detection unit, used to detect the current optical power of the i-th laser, wherein the current optical power is the optical power of the i-th laser when emitting light under the control of the current i-th control signal, N≥i≥1; When the current optical power of the i-th laser is not equal to the target optical power, the main control unit is further used to adjust the i-th control signal according to the detection result of the detection unit, so that when the i-th laser emits light under the control of the adjusted i-th control signal, the i-th optical power is equal to the target optical power; the main control unit updates the mapping relationship according to the adjusted i-th control signal.

13. The electronic device according to any one of claims 7 to 12, characterized in that: The N lasers are arranged in an array; multiple lasers in the same row of the N lasers are connected via a common anode terminal, and multiple rows of lasers are connected to a charging circuit with adjustable energy storage via corresponding common anode terminals respectively; the charging circuit with adjustable energy storage is used to provide electrical energy for the selected emitting laser; The charging circuit with adjustable energy storage stores a one-to-one corresponding i-th electric energy for the i-th laser according to the mapping relationship, so that the i-th optical power is equal to the target optical power.

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