Abstract: A lighting device includes: a light-emitting element having multiple first light-emitting sections and multiple second light-emitting sections; a first optical member that causes multiple pieces of first light outputted from the multiple first light-emitting sections and multiple pieces of second light outputted from the multiple second light-emitting sections to be substantially collimated, and outputs the multiple pieces of first light and the multiple pieces of second light; and a second optical member that shapes beam shapes of the multiple pieces of first light, beam shapes of the multiple pieces of second light, or both the beam shapes of the multiple pieces of first light and the multiple pieces of second light, and outputs the multiple pieces of first light and the multiple pieces of second light in a manner that the beam shapes are different between the multiple pieces of first light and the multiple pieces of second light.

Abstract: The present technique reduces the wiring inductance between a semiconductor laser and a laser driver in a semiconductor laser driving apparatus. A semiconductor laser driving apparatus includes a substrate, a laser driver, and a semiconductor laser. The substrate incorporates the laser driver. The semiconductor laser has at least one light emitting point. The semiconductor laser is mounted on one surface of the substrate in such a manner that an electrode of the light emitting point and a pattern of the substrate are connected to each other via a bump. Connection wiring electrically connects the laser driver and the semiconductor laser to each other with a wiring inductance of 0.5 nanohenries or less. A sealing portion seals a connection terminal portion of the semiconductor laser for the substrate.

Abstract: [Object] To provide a light-emitting element that has a vertical-cavity surface-emitting laser structure and is suitable for a long-distance light irradiation, and a ranging apparatus. [Solving Means] A light-emitting element according to the present technology includes a plurality of light emitters, a first electrode terminal, and a second electrode terminal. The plurality of light emitters is a plurality of light emitters one-dimensionally or two-dimensionally arranged in a direction that is vertical to an optical axis corresponding to light that exits each of the plurality of light emitters, each of the plurality of light emitters being a vertical-cavity surface-emitting laser element, each of the plurality of light emitters including a first electrode and a second electrode, each of the plurality of light emitters emitting the light due to current flowing from the first electrode to the second electrode. The first electrode terminal is electrically connected to the first electrode.

Abstract: A surface emission laser driving method according to an embodiment of the present technology includes the following two steps. (A) Generating drive pulses to be sequentially outputted to, out of a plurality of surface emission lasers disposed on a same substrate, each of the surface emission lasers selected as light-emission targets, on the basis of the number of surface emission lasers selected as the light-emission targets and a monitoring temperature that is immediately prior to light emission of each of the surface emission lasers selected as the light-emission targets. (B) Outputting the generated drive pulses to each of the surface emission lasers selected as the light-emission targets.

Abstract: A generation unit generates adjustment information to adjust a first clock indicating a timing of illumination of a laser beam to scan on a screen, based on a scanning position to be scanned by the laser beam. On the basis of the adjustment information, adjustment unit adjusts the first clock to a second clock different from the first clock. Then, in synchronization with the second clock, the laser beam is allowed to illuminate as a pixel. This may be applicable to a projection apparatus for projecting an image on the screen, for example.

Abstract: A laser driving circuit, a laser driving method, and a device using laser light that can reduce speckle noise caused by laser light as coherent light are provided. In the laser driving circuit that generates laser driving current for driving a plurality of laser light sources emitting laser light of different wavelengths on the basis of an input video signal, a high-frequency signal of a frequency exceeding the band of the video signal is superimposed on the laser driving current generated on the basis of the input video signal, whereby speckle noise caused by the laser light as coherent light is reduced.

Abstract: A generation unit generates adjustment information to adjust a first clock indicating a timing of illumination of a laser beam to scan on a screen, based on a scanning position to be scanned by the laser beam. On the basis of the adjustment information, adjustment unit adjusts the first clock to a second clock different from the first clock. Then, in synchronization with the second clock, the laser beam is allowed to illuminate as a pixel. This may be applicable to a projection apparatus for projecting an image on the screen, for example.

Abstract: A laser driving circuit, a laser driving method, and a device using laser light that can reduce speckle noise caused by laser light as coherent light are provided. In the laser driving circuit that generates laser driving current for driving a plurality of laser light sources emitting laser light of different wavelengths on the basis of an input video signal, a high-frequency signal of a frequency exceeding the band of the video signal is superimposed on the laser driving current generated on the basis of the input video signal, whereby speckle noise caused by the laser light as coherent light is reduced.

Abstract: A laser driving circuit, a laser driving method, and a device using laser light that can reduce speckle noise caused by laser light as coherent light are provided. In the laser driving circuit that generates laser driving current for driving a plurality of laser light sources emitting laser light of different wavelengths on the basis of an input video signal, a high-frequency signal of a frequency exceeding the band of the video signal is superimposed on the laser driving current generated on the basis of the input video signal, whereby speckle noise caused by the laser light as coherent light is reduced.

Abstract: A generation unit generates adjustment information to adjust a first clock indicating a timing of illumination of a laser beam to scan on a screen, based on a scanning position to be scanned by the laser beam. On the basis of the adjustment information, adjustment unit adjusts the first clock to a second clock different from the first clock. Then, in synchronization with the second clock, the laser beam is allowed to illuminate as a pixel. This may be applicable to a projection apparatus for projecting an image on the screen, for example.

Abstract: Disclosed herein is a laser driving circuit, including: a plurality of laser driving video current generation circuits configured to generate a plurality of kinds of laser driving current for driving a plurality of laser light sources configured to emit laser light having wavelengths different from each other based on an inputted video signal; a high frequency superposition section configured to superpose a high frequency signal having a frequency higher than a frequency band of the video signal on the laser driving current generated by the laser driving video current generation circuits; and a waveform correction section configured to correct a waveform of the high frequency signal.

Abstract: Disclosed herein is a laser driving circuit, including: a plurality of laser driving video current generation circuits configured to generate a plurality of kinds of laser driving current for driving a plurality of laser light sources configured to emit laser light having wavelengths different from each other based on an inputted video signal; a high frequency superposition section configured to superpose a high frequency signal having a frequency higher than a frequency band of the video signal on the laser driving current generated by the laser driving video current generation circuits; and a waveform correction section configured to correct a waveform of the high frequency signal.

Abstract: A generation unit generates adjustment information to adjust a first clock indicating a timing of illumination of a laser beam to scan on a screen, based on a scanning position to be scanned by the laser beam. On the basis of the adjustment information, adjustment unit adjusts the first clock to a second clock different from the first clock. Then, in synchronization with the second clock, the laser beam is allowed to illuminate as a pixel. This may be applicable to a projection apparatus for projecting an image on the screen, for example.

Abstract: A laser driving circuit, a laser driving method, and a device using laser light that can reduce speckle noise caused by laser light as coherent light are provided. In the laser driving circuit that generates laser driving current for driving a plurality of laser light sources emitting laser light of different wavelengths on the basis of an input video signal, a high-frequency signal of a frequency exceeding the band of the video signal is superimposed on the laser driving current generated on the basis of the input video signal, whereby speckle noise caused by the laser light as coherent light is reduced.

Abstract: A generation unit generates adjustment information to adjust a first clock indicating a timing of illumination of a laser beam to scan on a screen, based on a scanning position to be scanned by the laser beam. On the basis of the adjustment information, adjustment unit adjusts the first clock to a second clock different from the first clock. Then, in synchronization with the second clock, the laser beam is allowed to illuminate as a pixel. This may be applicable to a projection apparatus for projecting an image on the screen, for example.

Abstract: Disclosed herein is a laser driving circuit, including: a plurality of laser driving video current generation circuits configured to generate a plurality of kinds of laser driving current for driving a plurality of laser light sources configured to emit laser light having wavelengths different from each other based on an inputted video signal; a high frequency superposition section configured to superpose a high frequency signal having a frequency higher than a frequency band of the video signal on the laser driving current generated by the laser driving video current generation circuits; and a waveform correction section configured to correct a waveform of the high frequency signal.

Abstract: Disclosed herein is a laser driving device including: a sample-hold section; a first pulse generating section; a second pulse generating section; a light emission waveform generating section; a storing section; and a sampling pulse generating section.

Abstract: Disclosed herein is a laser driving apparatus, including: a driving unit adapted to current drive a laser device with a current value in accordance with a level of a signal supplied thereto; and an emission light waveform correction unit adapted to receive supply of a pulsed reference signal and generate, based on a correction timing pulse interlocked with a rising edge and/or a falling edge of a pulse, a correction signal having a level different from that of the reference signal and then supply the correction signal to the driving unit so that the shape of the emission light waveform of the laser device becomes close to that of a rectangular wave.

Abstract: Disclosed herein is a hard disk apparatus, including: a magnetic recording medium; a recording head adapted to record information on the magnetic recording medium; a semiconductor laser adapted to be controlled for light emission in a cycle of a recording clock to irradiate a light spot upon the magnetic recording medium to carry out thermal assistance in magnetic recording by the recording head; a laser driving circuit adapted to drive the semiconductor laser at a timing and with optical power in accordance with a light emission timing signal and a laser power controlling signal; and a controller adapted to set laser power in accordance with at least one of characteristics of the magnetic recording medium, semiconductor laser and recording head and output the laser power controlling signal to the laser driving circuit so that the laser power is adaptively varied.

Abstract: A laser driving device includes a storage unit that stores signal patterns for recording-waveform control representing level information of each divided driving signal to drive a laser device on a space and a mark based on the divided driving signals. Also, it includes a pulse generator that generates the reference pulse and the switching pulse based on a first transmission signal and a second transmission signal. The first transmission signal contains timing information for acquiring a reference pulse that represents a timing of repetitively switching between the space and the mark. The second transmission signal contains timing information for acquiring a switch pulse that represents a timing of switching the signals. Among level information for each of the signals in the storage, reference level information is read together with the reference pulse. Other level information after the reference level information is sequentially read for each switching pulse.