A laser projector steers a pulsed laser beam to form a pattern of stationary dots on an object, the pulsed laser beam having a periodicity determined based at least in part on a maximum allowable spacing of the dots and on a maximum angular velocity at which the beam can be steered, wherein a pulse width of the laser beam and a pulse peak power of the laser beam are based at least in part on the determined periodicity and on laser safety requirements.

A scanning device includes an MEMS mirror mechanism that swings a mirror with respect to a first axial line as a central line and swings the mirror with respect to a second axial line as a central line, and a control unit that generates a first drive signal for swinging the mirror with respect to the first axial line, and a second drive signal for swinging the mirror with respect to the second axial line. The control unit generates the first drive signal and the second drive signal so that m times of reciprocation of an irradiation region in a first direction and one time of reciprocation of the irradiation region in a second direction correspond to each other by repeating generation of a second signal element constituting the second drive signal to correspond to a first signal element in a period equal to or less than one cycle in the first drive signal.

In an optical module and a scanning-type image display device, a reduction in heat insulating effect due to a natural convection generated between the optical module and a case is suppressed to alleviate laser overheating and thermal expansion or contraction of each component and obtain a stable projection image quality. In an optical module that couples laser beams from a plurality of laser beam sources 1a, 1b, 1c and irradiates the laser beams to a desired position, a cover that covers the optical module is provided, a second cover is provided in a space between the optical module and the cover, and a projecting part is provided on a surface of the second cover facing the optical module.

A field-sequential color image display device is provided which can sufficiently reduce power consumption while suppressing color breakup. In a liquid crystal display device that displays a color image under a field sequential system in which each frame period includes four field periods corresponding to three primary colors, namely red, green, and blue, and a white color, the emission intensity of a light source section (120) during the white field period is determined in advance so that the white color is displayed at a target maximum luminance when the transmittance of a pixel array section (110) is at its maximum during all of the four field periods. A drive control section (200) separates an input image signal into white, blue, green, and red components, expands the white component, and then assigns the components to the four field periods. This causes the pixel array section (110) to, during the respective field periods, display images of the corresponding colors based on the signal components thus assigned, giving a color image by an additive color mixture over time.

An image rendering apparatus includes a light source unit, an optical scanner, a scanner control unit configured to control a frequency for the optical scanner to scan the laser light in the main scanning direction, and a light source driving unit. The scanner control unit multiplies the frequency by n and the light source driving unit changes time intervals at which pixels are rendered on scanning lines in the main scanning direction to 1/nth and controls the light source unit in such a way that the light source unit renders a plurality of pixels corresponding to one scanning line at least once during n scans in the main scanning direction and in such a way that the light source unit will not render pixels on scanning line(s) other than the scanning lines on which the pixels have been rendered.

A 3D laser projection systems and methods are disclosed herein. A laser projection system includes a left projector head and a right projector head, wherein a first video projected onto a movie screen by the left projector head has a first polarization and a second video projected onto the movie screen by the right projector head has a second polarization different from the first polarization. The laser projection system can include a laser light generator located a first defined distance away from the left projector head and a second defined distance from the right projector head and coupled to the left projector head and the right projector head with fiber optic cables that transmit light from the laser light generator to the left projector head and the right projector head. The laser light generator includes a laser diode configured to output light and to transmit it to the fiber optic cables.

A projection apparatus includes a projection cavity, a light source, a scanning motor, and a processor. The light source and the scanning motor are located inside the projection cavity, and the processor is connected to both the light source and the scanning motor. A reflection layer is disposed on a scanning mirror of the scanning motor, where the reflection layer is configured to reflect light emitted by the light source.

To facilitate selection of a display manner in a display device capable of displaying an image(s) based on a plurality of image signals, the display device according to the present invention includes: a video inputter including a plurality of input terminals configured to acquire a plurality of image signals including image data to be displayed by a display unit; a detector configured to detect characteristics of the image signals; a group determinator configured to classify the image signals into at least one group based on the characteristics detected by the detector; and an output control unit configured to output information indicating a display mode of the display unit associated with at least one group.

A method for activating a deflection device comprising at least one deflection unit, for a projection device for projecting trajectories upon a projection surface, wherein the deflection device deflects electromagnetic radiation which is directed upon it, for producing trajectories, and the at least one deflection unit is activated by way of an activation signal delivered from a control device, for producing oscillations in each case with a turning amplitude at a direction change of the oscillation, about at least one deflection axis, wherein in the case of resonance, the oscillations have a maximal amplitude, at which the produced trajectories reach an edge of the projection surface. The activation signal is set in a manner such that the turning amplitude of the oscillations at least temporarily has a predefined value outside a region of the maximal amplitude of the oscillations, and an intensity distribution of the produced trajectories on the projection surface is achieved with a predefined intensity pattern. The document moreover relates to a deflection device as well as to a projection device.

An optical device includes a movable unit that supports a glass plate, axis portions that swingably support the movable unit around a swing axis, a support unit that supports the axis portions and, a permanent magnet that is provided in the movable unit, and a coil that is disposed to face the permanent magnet, and a coil support unit that is supported by the support unit and supports the coil. A conductive wire is wound around the coil and a drawn wire is drawn from the side of the inner circumference of the coil. The coil support unit includes a through hole overlapping the inner circumference of the coil and the drawn wire is inserted through the through hole.