Abstract: A ranging device includes a light emitting circuit configured to emit light and a splitter configured to split the light into multiple beams. The ranging device includes a scanning circuit configured to perform scanning in two axial directions while aiming the multiple beams toward an emission area. The ranging device includes multiple light receiving circuits configured to respectively receive beams obtained from the multiple beams that are reflected or scattered by an object existing in the emission area, the light receiving circuits being configured to respectively output light reception signals. The ranging device includes a distance-information outputting circuit configured to output distance information about the object, the distance information being obtained based on each of the light reception signals that is output from a corresponding light receiving circuit among the multiple light receiving circuits.

Abstract: A light scanning device includes a light emitter configured to emit light; an optical scanner configured to cause the light to scan; a light receiver configured to receive returning light as scanning light from the optical scanner being reflected or scattered on an object; and an optical scanning controller including processing circuitry configured to control the optical scanner. The optical scanner includes a rotating polyhedron configured to include a plurality of reflective surfaces, to cause the light to scan around a first axis by reflecting the light on a reflective surface while rotating around the first axis; a supporter configured to support the rotating polyhedron; and a rotating mechanism configured to rotate the supporter around a second axis that crosses the first axis, to cause the light reflected on the reflective surface to scan around the second axis.

Abstract: An image projection apparatus includes a light irradiation device configured to irradiate a laser beam, an optical scan device configured to deflect the laser beam to make an optical scan, and project an image on a display region, an optical sensor arranged outside the display region, and including a first light receiving region and a second light receiving region that are arranged at different positions along a vertical scanning direction of the optical scan, and a deflection angle controller. The deflection angle controller corrects a deflection angle in the vertical scanning direction of the optical scan device, based on a number of times the laser beam is detected by the first light receiving region and a number of times the laser beam is detected by the second light receiving region.

Abstract: A control device for a laser scanning display apparatus includes a laser device, a current source that generates an electric current supplied to the laser device, and a controller that controls the current source to set a current value of the electric current supplied to the laser device. During a period for scanning a non-display area where no image is displayed, the controller sets the current value at a first drive current value that is less than a threshold current value at which the laser device starts oscillating; and during a period for scanning a portion with a luminance level of zero in a display area where an image is displayed, the controller sets the current value at a second drive current value that is greater than or equal to the first drive current value and less than the threshold current value.

Abstract: A control device, which controls a laser scanning display device, includes a laser device, a first current source that generates a first driving current supplied to the laser device, a second current source that generates a second driving current supplied to the laser device, and a controller. The controller controls the first current source to generate the first driving current having a first set current value that is 1/n times a threshold current value at a time when oscillation of the laser device starts, when scanning a non-display area in which no image is displayed, where n is a number greater than 1. The controller controls the second current source to generate the second driving current having a second set current value that is zero or greater and less than 1?1/n times the threshold current value, when scanning the non-display area.

Abstract: A control device for a laser scanning display apparatus includes a laser device, a current source that generates an electric current supplied to the laser device, and a controller that controls the current source to set a current value of the electric current supplied to the laser device. During a period for scanning a non-display area where no image is displayed, the controller sets the current value at a first drive current value that is less than a threshold current value at which the laser device starts oscillating; and during a period for scanning a portion with a luminance level of zero in a display area where an image is displayed, the controller sets the current value at a second drive current value that is greater than or equal to the first drive current value and less than the threshold current value.

Abstract: A teaching device that teaches a robot, includes a display section. When the teaching device is placed on a placing surface, the display section tilts at an angle of 15 degrees or more with respect to the placing surface.

Abstract: An optical scanning control device is provided. The optical scanning control device includes a scanning unit configured to scan light emitted from a laser and a screen on which the light scanned by the scanning unit forms an image. A plurality of micro lenses are arranged in an array on a surface of at least one of a light-entering side and a light-exiting side of the screen. The micro lenses are arranged in an array in such a way that the center-to-center distances are randomized in at least one of a first direction and a second direction orthogonal to the first direction.

Abstract: A control device, which controls a laser scanning display device, includes a laser device, a first current source that generates a first driving current supplied to the laser device, a second current source that generates a second driving current supplied to the laser device, and a controller. The controller controls the first current source to generate the first driving current having a first set current value that is 1/n times a threshold current value at a time when oscillation of the laser device starts, when scanning a non-display area in which no image is displayed, where n is a number greater than 1. The controller controls the second current source to generate the second driving current having a second set current value that is zero or greater and less than 1?1/n times the threshold current value, when scanning the non-display area.

Abstract: A control apparatus is used in a display apparatus. The control apparatus includes a laser element; a temperature sensor configured to detect a temperature of the laser element; a laser driver configured to drive the laser element; and a laser control unit configured to control a driving current to be supplied to the laser element by the laser driver, such that an optical output value of the laser element converges to a target optical output value. The laser control unit determines an initial driving current value that causes an initial optical output value to be output from the laser element, based on temperature characteristic data of the initial driving current value, and a detection temperature of the laser element detected by the temperature sensor, and controls the driving current to start from the determined initial driving current value.

Abstract: An image projection apparatus includes a light irradiation device configured to irradiate a laser beam, an optical scan device configured to deflect the laser beam to make an optical scan, and project an image on a display region, an optical sensor arranged outside the display region, and including a first light receiving region and a second light receiving region that are arranged at different positions along a vertical scanning direction of the optical scan, and a deflection angle controller. The deflection angle controller corrects a deflection angle in the vertical scanning direction of the optical scan device, based on a number of times the laser beam is detected by the first light receiving region and a number of times the laser beam is detected by the second light receiving region.

Abstract: An image projection apparatus includes a light emission unit for emitting laser light; a light scanning unit for projecting an image on a drawing area by reflecting the light and scanning the reflected light; a light detection unit arranged outside of the drawing area; a detection unit for detecting, according to a deviation from a desired value of a first pixel detected by the light detection unit when the light is horizontally scanned in a first direction and a deviation from a desired value of a second pixel detected by the light detection unit when the light is horizontally scanned in a second direction, each of a phase deviation of the laser light in a horizontal scanning direction and a swing angle fluctuation of the light scanning unit; and a compensation unit configured to compensate for each of the phase deviation and the swing angle fluctuation.

Abstract: An image projection apparatus includes a light emission unit for emitting laser light; a light scanning unit for projecting an image on a drawing area by reflecting the light and scanning the reflected light; a light detection unit arranged outside of the drawing area; a detection unit for detecting, according to a deviation from a desired value of a first pixel detected by the light detection unit when the light is horizontally scanned in a first direction and a deviation from a desired value of a second pixel detected by the light detection unit when the light is horizontally scanned in a second direction, each of a phase deviation of the laser light in a horizontal scanning direction and a swing angle fluctuation of the light scanning unit; and a compensation unit configured to compensate for each of the phase deviation and the swing angle fluctuation.

Abstract: An optical scanning control device is provided. The optical scanning control device includes a scanning unit configured to scan light emitted from a laser and a screen on which the light scanned by the scanning unit forms an image. A plurality of micro lenses are arranged in an array on a surface of at least one of a light-entering side and a light-exiting side of the screen. The micro lenses are arranged in an array in such a way that the center-to-center distances are randomized in at least one of a first direction and a second direction orthogonal to the first direction.

Abstract: An optical scanner apparatus that oscillates a mirror to scan incident light, includes an optical scanner unit that includes a sensor that detects an oscillation angle of the mirror, and an interconnect connected to the sensor; and a shading unit that shades the sensor and the interconnect from stray light of the incident light and ambient light.

Abstract: A teaching device that teaches a robot, includes a display section. When the teaching device is placed on a placing surface, the display section tilts at an angle of 15 degrees or more with respect to the placing surface.

Abstract: An optical scanner apparatus includes first and second torsion beams which support a mirror support portion supporting a mirror from both sides in an axial direction; first and second horizontal driving beams configured to include first and second horizontal driving sources, respectively, a connecting beam; a first piezo-electric sensor; first and second sensor interconnects connected to one of and the other of an upper electrode and a lower electrode of the first piezo-electric sensor, respectively, the first sensor interconnect and the second sensor interconnect being formed to extend toward the first horizontal driving beam and the second horizontal driving beam, respectively.

Abstract: An optical scanner apparatus that oscillates a mirror to scan incident light, includes an optical scanner unit that includes a sensor that detects an oscillation angle of the mirror, and an interconnect connected to the sensor; and a shading unit that shades the sensor and the interconnect from stray light of the incident light and ambient light.

Abstract: An optical scanning device includes a mirror part including a mirror reflecting surface to reflect incident light, a pair of torsion bars configured to support the mirror part from both sides and configured to form a first axis around which to swing the mirror part by a torsional motion thereof so as to deflect the reflected light, and at least one stress alleviation area configured to alleviate a stress generated by the torsional motion of the torsion bars. The alleviation area is provided between an intersection of a second axis perpendicular to the first axis and passing through the center of the mirror reflecting surface and an edge of the mirror reflecting surface, and at least one of the torsion bars.