Calibration apparatus, laser beam emission circuit and electronic device
This application relates to a calibration apparatus, a laser beam emission circuit and an electronic device. The calibration apparatus is applied to the laser beam emission circuit, where the laser beam emission circuit includes N lasers, and the calibration apparatus includes: a detection module, configured to detect optical power of an i th laser; and a control module, configured to adjust an i th control signal based on a detection result of the detection module. The control module is further configured to establish 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.
1 . A calibration apparatus for a laser beam emission circuit, wherein the laser beam emission circuit comprises N lasers, where N is a positive integer greater than or equal to 2, the calibration apparatus comprising:
a detection module, configured to detect optical power of an i th laser; and
a control module, configured to adjust an i th control signal based on a detection result of the detection module, so that i th optical power is equal to target optical power, wherein N≥i≥1, the i th control signal is for controlling optical power of the i th laser during laser beam emission, and the i th optical power is optical power of the i th laser during laser beam emission, and the control module is further configured to establish 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, wherein
the N lasers emit laser beams by using electric energy provided by at least one energy storage-adjustable charging circuit, the i th control signal is an i th charging control signal for controlling the energy storage-adjustable charging circuit to store i th electric energy, wherein the i th electric energy is configured to provide energy for the i th laser to emit a laser beam, and the control module is configured to adjust the i th electric energy by using the i th charging control signal, so that the i th optical power is equal to the target optical power; and
the energy storage-adjustable charging circuit comprises a charging switch element and a transitory energy storage element, wherein
the charging switch element is connected between an emission power supply and the transitory energy storage element, and when the charging switch element is turned on, the transitory energy storage element is configured to store electric energy by using the emission power supply; and
the control module is configured to adjust turn-on duration of the charging switch element by using the i th charging control signal, to adjust a level of the i th electric energy, so that the i th optical power is equal to the target optical power, wherein
the i th charging control signal is a pulse signal, and the turn-on duration of the charging switch element is related to a pulse width of the i th charging control signal;
the mapping relationship established 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 an electronic device obtains the i th charging control signal in a one-to-one correspondence with 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; or
the control module is further configured to generate a pulse parameter configuration table based on the mapping relationship and the pulse width, and the electronic device generates the i th control signal in a one-to-one correspondence with 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.
2 . The calibration apparatus according to claim 1 , wherein the N lasers are disposed in an array, a same row of multiple lasers in the N lasers are connected through a shared anode end, multiple rows of lasers are respectively connected to the energy storage-adjustable charging circuit through the shared anode ends in a one-to-one correspondence with the multiple rows of lasers, the energy storage-adjustable charging circuit is configured to provide electric energy for a laser selected for laser beam emission, and the energy storage-adjustable charging circuit is configured to store, for the i th laser, the i th electric energy in a one-to-one correspondence with the i th laser based on the mapping relationship, so that the i th optical power is equal to the target optical power.
3 . A laser beam emission circuit, comprising N lasers and is configured to obtain an i th control signal in a one-to-one correspondence with an i th laser based on the mapping relationship provided by the calibration apparatus according to claim 1 , so that optical power of the i th laser during laser beam emission is equal to target optical power, wherein N≥i≥1.