An optical module includes a fast-axis mirror that scans a laser beam along a fast-axis, a magnification mirror set formed by three discrete mirrors shaped to magnify the laser beam as it is scanned along the fast-axis and reflect the laser beam after magnification toward a slow-axis mirror that scans the laser beam along the slow-axis, and an Offner mirror relay that receives the laser beam as it is scanned along the slow-axis and reflects the laser beam out an exit aperture. The laser beam as output from the exit aperture is received at an input diffractive grating of a diffractive waveguide, with a user's eye being positioned adjacent an output diffractive grating of the waveguide such that the user's eye views ambient light entering the waveguide from objects within the user's field of view as well as light from the laser beam as it exits the output diffractive grating.

An image projector includes an illumination arrangement with a number of illumination sources and a tilt-mirror assembly, all operating under control of a controller. An optical arrangement directs illumination from the illumination sources towards the mirror and on to an image plane. A collimating arrangement collimates the illumination from the image plane to generate a collimated image directed to an exit stop. The controller (830) modulates an intensity of each of the illumination sources (808) synchronously with tilt motion of the mirror (814) according to the content of the digital image. In certain implementations, the illumination sources (808) are spaced apart. Although the tilt motion brings each illumination source to scans across only part of a dimension of the field of view, all of the illumination sources together scans across the entirety of the one dimension.

A light source device includes a plurality of light sources configured to output a plurality of laser beams of different color components; and circuitry. A ratio in maximum output power between the plurality of laser beams output from the plurality of light sources is variable.

Techniques for improving laser image quality are disclosed herein. An ultra-compact illumination module includes multiple illuminators, photodetectors, and color filters. The illuminators each emit a different spectrum of light. Because of the compact nature of the module and the positioning of the illuminators relative to one another, the different spectrums of light overlap one another prior to being detected by the photodetectors. Each of the photodetectors is associated with a corresponding one of the illuminators, and each of the color filters is associated with a corresponding one of the photodetectors. Each color filter is positioned in-between its corresponding illuminator and photodetector and passes a particular spectrum of light while filtering out other spectrums of light. Consequently, the photodetectors each receive spectrally filtered light having passed through at least one of the color filters. The power output of the illuminators can also be corrected based on output from the photodetectors.

Provided is a light beam emission device and a light beam projection device, that are downsizable, have a simple configuration, and simplify complicated processing of video signals, such as the timing adjustment of video output signals, without generating color irregularity. The devices include: a plurality of light sources; and a condensing member. A range in the light source array direction, in which emission spots of the light beams emitted from the plurality of light sources respectively exist, is within a size in the array direction of a light beam, immediately after the light beam emitted from an emission spot located most closely to the center of the plurality of light sources, with respect to the condensing member, passed through the condensing member.

A virtual image display system for displaying virtual images having expanded resolution and field of view is disclosed. The virtual image display system comprises a first light emitter emitting a plurality of first light signals to be projected into a viewer's eye; a first light direction modifier varying a light direction of the plurality of first light signals emitted from the first light emitter. The light direction of first light signals is varied at a first scan rate with respect to time within a first spatial range for displaying a first image frame with a predetermined number of light signals and the first scan rate is non-constant.

A head-up display apparatus projects a plurality of virtual images of which depths perceived by a user are different from each other. The head-up display apparatus includes a first projection apparatus and a second projection apparatus. The first projection apparatus includes a first display-light emitting unit configured to emit first display light, and a concave mirror configured to reflect the first display light and thereby emit reflected light thereof, and is configured to enable the user to perceive a first virtual image by projecting the reflected light onto a virtual-image display unit. The second projection apparatus includes a second display-light generation unit configured to let the reflected light pass therethrough and generate second display light different from the first display light, and is configured to enable the user to perceive a second virtual image by projecting the generated second display light onto the virtual-image display unit.

An electronic device, in disclosed embodiments, includes an antenna, transceiver circuitry coupled to the antenna, a memory configured to store a first operation key and instructions, and a processor coupled to the transceiver and to the memory. The processor is configured to execute the instructions stored in the memory to cause the electronic device to, in response to receiving a first transmission containing an encrypted version of a second operation key that is encrypted by the first operation key, decrypt the encrypted version of the second operation key using the first operation key to recover the second operation key, store the second operation key in the memory, transmitting, by a transmitter of the electronic device, a second transmission that contains the first operation key and a command.

The present invention discloses a laser animation projection device. The device comprises a controlling mainboard, an X-axis high-speed galvanometer motor, a Y-axis high-speed galvanometer motor and a laser device; a MCU is disposed on the controlling mainboard; an X-axis galvanometer lens is connected to an output shaft of the X-axis high-speed galvanometer motor; a Y-axis galvanometer lens is connected to an output shaft of the Y-axis high-speed galvanometer motor; a display screen is disposed in front of the two galvanometer lenses; a WIFI module is disposed on the controlling mainboard; the laser device is positioned according to positions of the two galvanometer lenses, so as to make the laser emitted by the laser device be reflected onto the display screen through the two galvanometer lenses. A control method for the laser animation projection device is also disclosed.

A system and method for displaying a 3D image with depths, which utilize at least one light signal generator to sequentially generate multiple light signals(S100) and at least one optical assembly to receive the multiple light signals from the at least one light signal generator, and project and scan the multiple light signals within a predetermined time period to display the 3D image in space(S200). Each pixel of the 3D image is displayed at a position by at least two of the multiple light signals to a viewer's eye, paths or extensions of the paths of the at least two light signals intersects at the position and at an angle associated with a depth of the pixel, and the predetermined time period is one eighteenth of a second. Accordingly, the advantages of simplified structure, a miniatured size, and a less costly building cost can be ensured.