A scanning projector display includes a light engine comprising N emitters coupled to a collimator for providing a fan of N light beams of variable optical power levels, where N>1. The N emitters are spaced apart from each other such that pixels of the image simultaneously energized by neighboring ones of the N emitters are non-adjacent. A scanner receives and angularly scans the fan of N light beams about first and second non-parallel axes to provide an image in angular domain. A controller coupled to the scanner and the light engine causes the scanner to simultaneously scan the fan of N light beams about the first and second axes, and cause the light engine to vary the optical power levels of the N emitters with time delays such that adjacent pixels of the image are energized by different ones of the N emitters.

An optical device includes a movable section including an optical section that deflects video light in accordance with the angle of incidence of the video light incident on a light incident surface and outputs the deflected video light and a holder that supports the optical section, an actuator that rotates the movable section around a first axis, an actuator that rotates the movable section around a second axis, a drive circuit that supplies the actuator with a first drive signal and the actuator with a second drive signal, and a sensor disposed in a position different from the positions on the first and second axes detects the position of the optical section, and the drive circuit adjusts the first and second drive signals in accordance with the position of the optical section detected with the sensor.

The disclosure relates to the technical field of projection auto-focusing, and embodiments particularly disclose a projection focusing method, a projection focusing apparatus, a projector, and a readable storage medium. According to the projection focusing method provided by this application, an initial position of a focused motor is roughly determined based on a current projection distance, a focusing direction is determined according to the current projection distance and a projection distance corresponding to the current motor position, a position of a clearest projection picture can be found by traversing a few motor positions, and the speed and precision of projection focusing are greatly increased.

A multi-projection system for projecting an image from a plurality of projectors onto a three-dimensional object, includes a master projector and a slave projector. The slave projector estimates an amount of blur in an image projected from the projector itself on a plurality of planes of the three-dimensional object, and provides the estimated amount of blur in the image to the master projector. The master projector estimates an amount of blur in an image projected from the projector itself on a plurality of planes of the three-dimensional object, and determines a region of the image projected from the plurality of projectors for each of the plurality of planes based on the amount of blur in the image estimated by the master projector and the amount of blur in the image estimated by the slave projector.

A focusing module includes a focusing ring and a projection lens mounting ring. The focusing ring has a first ring body and a first annular wall with a limiting hole. The projection lens mounting ring has a second annular wall which can rotate relative to the first annular wall along a circumferential direction of the first annular wall. The second annular wall has a through hole and a rotation buffer structure having a limiting portion and a cantilever portion. The limiting portion has a center surrounded by the hole edge and protruding toward the first annular wall. The center has first side and second side. A thickness of the limiting portion decreases from the center toward the first and second side. The center is in the limiting hole and the first annular wall is pressed against the first and second side when the limiting portion contacts against the limiting hole.

A projection apparatus includes a main body configured to project and display an image from a projection port of the main body; and an operation detection apparatus detachably attached to the main body and configured to acquire operation information relating to an operation on a projection screen performed by an operator. The main body includes an attachment portion provided on a surface of the main body on which the projection port is provided. The attachment portion is a portion where the operation detection apparatus attached to the main body.

An optical projection device, which effectively suppresses variation in aberration due to irregularities in installation positions of lens groups which form an optical projection system, and a projector which includes the optical projection device are provided. In a lens group, which includes a diaphragm, in an optical projection device which includes a plurality of lens groups, a lens frame is divided between the diaphragm and a lens which is adjacent to the diaphragm, one lens frame which is acquired through the division includes an adjustment portion, which maintains a position of an optical axis to be adjusted, with respect to the other lens frame which is acquired through the division.

Eyewear including a frame, a projector supported by the frame, and a lens supported by the frame. The lens has a first surface facing an eye of the user and a second surface facing away from the eye of the user when the frame is worn. The lens also includes a waveguide defined by the first and second surfaces to receive light from the projector. An input light coupler and an output light coupler are on the first surface of the lens and at least one reflector is positioned on a second surface of the lens to redirect light received from the input coupler and/or the output coupler to redirect light having an angle of incidence with respect to the second surface of the lens that would result in that portion of the light exiting the waveguide through the second surface in the absence of the at least one reflector.

The projection lens includes: a third optical system that projects an image light toward a screen and that includes an emission lens located on a most projection surface side; and a light receiver. The light receiver receives an optical signal from the remote controller. The light receiver is attached to a position capable of receiving the optical signal transmitted through an emission lens, specifically, to a holding frame, and more specifically, to a first surface of the holding frame.

A projector and display apparatus using a holographic optical element are provided. The projector includes a first display panel configured to emit a first beam of a first image, a second display panel configured to emit a second beam of a second image, a first transmissive holographic optical element configured to separate the first beam into a first diffracted beam and a second diffracted beam such that pixels of the first image overlap each other, a second transmissive holographic optical element configured to separate the second beam into a third diffracted beam and a fourth diffracted beam such that pixels of the second image overlap each other, a reflective holographic optical element configured to diffract and reflect the third and fourth diffracted beams in the same direction as the first and second diffracted beams such that the first image and the second image at least partially overlap each other, and a projection lens.