According to aspects of the embodiments, there is provided an apparatus and method for driving a laser imaging module (LIM) that includes an adjustment current to have all laser diodes emitting the same amount of output so that the diodes can be connected in series on a single high current power source. Fine tuning can be done by a dedicated low current controllable power source connected directly to each laser diode. A series connected LIM uses only two heavy gauge wires so total power loss and heat stress on the LIM and module drawer connectors will be significantly reduced. Additional fine tuning can include an electronic gate so that individual diodes could be quickly turned off independently from each other.

In a laser light emitting device including a plurality of laser light emitter each including a laser diode, a drive circuit configured to drive the laser diode by controlling the supply of a drive current to the laser diode, and a drive line through which the drive current flows from the drive circuit to the laser diode, a light emission detector includes a detection pattern placed so as to cause an electromagnetically induced current to flow in response to a drive current flowing through each drive line when the corresponding laser light emitter emits light. The light emission detector detects light emission from a driven laser diode by detecting the current flowing in the detection pattern.

The present disclosure relates to a method and an apparatus for opening the external layer structure of cells using laser, wherein the short pulse laser excited from a laser diode is collimated via the optical lens and concentrated at a focus, a biological sample which is fixed on the focus or moves through the focus is treated with the concentrated short pulse laser, so that the cell membrane or cell wall of cells in the sample is broken.

An applicator comprising multiple laser assemblies connected to a power supply and a controller that switches each pulse to a different one of the laser assemblies. Each laser assembly deposits a laser spot on the skin and the result is to produce a large ‘aggregate’ spot without requiring extra power or extra lasers. In one embodiment, each pulse serves as a trigger to switch the next pulse to the next laser assembly.

A driver circuit includes: a current-controlling switching element electrically connected to a light emitting element; a differential amplifier circuit including: an output terminal electrically connected to the current-controlling switching element, a first input terminal configured to receive a reference signal as a reference for radiating light with a desired intensity from the light emitting element, and a second input terminal configured to receive a detection signal corresponding to a detection result of a current flowing in the light emitting element, wherein the differential amplifier circuit is configured to control the current flowing in the light emitting element and the current-controlling switching element based on a voltage of the first input terminal and a voltage of the second input terminal; and an adjustment part configured to adjust an overshoot amount of a rising edge of the current flowing in the light emitting element.

Disclosed in embodiments of the present disclosure is a system for controlling a laser projector, a laser projector assembly, a terminal, a method for controlling a laser projector, a method for controlling a laser light output, a device for controlling a laser light output and a computer readable storage medium. The system includes a first drive circuit coupled to the laser projector. The first drive circuit is configured to output an electrical signal to drive the laser projector to project laser light and to turn off the laser projector when a duration of outputting the electrical signal is greater than or equal to a preset threshold.

The present technology relates to a lighting device, a method for controlling the lighting device, and a distance measurement module that make it possible to reduce a cyclic error.

The lighting device includes a plurality of light sources including a first light source and a second light source, and a drive unit that drives the plurality of light sources. The drive unit causes the first light source and the second light source to emit light at different timings and light emission periods to cause a light emission intensity by the plurality of light sources to have symmetry in a time direction in a time width of one cycle around a peak value or a minimum value. The present technology can be applied to, for example, a distance measurement module that measures a distance to a subject, and the like.

A laser diode driving circuit includes a switching element, a controller configured to turn on an off the switching element, a second series circuit connected in parallel with a first series circuit including a laser diode, and a capacitor. The second series circuit includes a rectifying element and a current limiter configured to limit a current passing through the rectifying element, and is connected in parallel with the first series circuit such that the direction pointing from the anode to the cathode of the rectifying element is opposite to the direction pointing from the anode to the cathode of the laser diode. The capacitor is configured to be charged when the switching element is off and to form a closed circuit with the switching element and the first and second series circuits when the switching element is on.

A laser diode driver circuit is provided that has a loop including a laser diode, a drive capacitor for storing drive charge, and a switch element, a first inductor coupled in series with the laser diode, a parallel capacitor coupled in parallel with a series circuit composed of the laser diode and the first inductor, and a first diode coupled in parallel with the series circuit in opposite polarity to the laser diode.

A semiconductor laser drive circuit includes: an anode electrode divided into at least one gain region and at least one light absorption region; a cathode electrode shared between the gain region and the light absorption region; and a resistance connected to the anode electrode of the light absorption region.