Implementations described herein generally relate to scanning beam display systems and more specifically, to systems and methods for improved image alignment of such scanning beam display systems. The method comprises providing a display system comprising a display screen having a plurality of display screen region each with a corresponding light engine module having a servo laser beam and an excitation laser beam, scanning the servo laser beam of a light engine module in an outer scanning region outside of the light engine module's corresponding display screen region, detecting servo laser beam feedback light to measure an alignment error of the light engine module relative to the light engine module's corresponding display screen region, and adjusting alignment of the excitation laser beam based on the measured alignment error.

To provide an optical module and a scan-type image projection display device at low power consumption in a configuration of enhancing a heat radiation property with excellent assembly performance. An optical module for coupling and irradiating laser beams from a plurality of laser diodes, and onto a desired position is characterized in that a first protruded part corresponding to a first laser holder for holding a first laser diode 1a and a second protruded part corresponding to a second laser holder for holding a second laser diode are provided on a base for placing the optical module thereon, and heat conductive materials are provided between the first protruded part and the first laser holder and between the second protruded part and the second laser holder, respectively.

The laser projection display device includes: a photo-sensor for detecting the quantity of laser light generated by the laser light source; and an image processing unit for processing a drive signal on the basis of the quantity of light of the detected laser light and supplying the processed drive signal to a driving unit for the laser light source. Right after the dimming, the image processing unit supplies the drive signal to the driving unit for the laser light source on the basis of the quantity of light of the detected laser light within a second execution cycle shorter than a first execution cycle which is the execution cycle used during the normal operation.

An optical scanning device includes a light source, a scanning member, and an incident optical system. The scanning member two-dimensionally scans a scanning area with the deflected light beam in a first direction and a second direction perpendicular to the first direction. The incident optical system guides the emitted light beam to the scanning member, the incident optical system including the light source. The scanning area includes a first area and a second area surrounding the first area. When the scanning area is viewed from a side of the scanning member, at least a part of the incident optical system is disposed in an area of the second area that overlaps one of two divided areas of the scanning area. The two divided areas are divided by a line segment parallel to the first direction,

The disclosed subject matter relates to a method of manufacturing a light projector module, comprising the steps of: providing a base plate, a light source on the base plate, and a micro-electro-mechanical-system (MEMS) scanning assembly, wherein the base plate has, between the light source and the MEMS scanning assembly, a mounting surface accessible at one side of the base plate; positioning a set of one or more lenses on the mounting surface and adjusting the position of the one or more lenses of the set while the light source is emitting and at least one light beam projected by the light projector module is monitored in a display area; and mounting the one or more lenses of the set in the adjusted position fixedly on the base plate.

An image projector includes a spatial light modulator (SLM) with a two dimensional array of pixel elements controllable to modulate a property of light transmitted or reflected by the pixel elements. An illumination arrangement delivers illumination to the SLM. A collimating arrangement collimates illumination from the SLM to generate a collimated image directed to an exit stop. The illumination arrangement is configured to sequentially illuminate regions of the SLM, each corresponding to a multiple pixel elements. A controller synchronously controls the pixel elements and the illumination arrangement so as to project a collimated image with pixel intensities corresponding to a digital image.

The light source unit includes a base provided with an opening, a support member fixed to the base at the opening, and a light source assembly fixed to the support member at the opening. The light source assembly includes a light source emitting laser light, a lens disposed on an optical axis of the laser light, and a holding member holding the light source and the lens. The support member has a convex receiving surface extending along the spherical surface so as to surround the optical axis when viewed from a direction parallel to the optical axis. The light source assembly is fixed to the support member by coupling the holding member to the receiving surface at a contact portion with the receiving surface. The receiving surface has a portion located on a side away from the optical axis with respect to a coupling part with the holding member.

A circuit apparatus is used in a laser projector that projects an image onto a projection surface by using laser beams having different wavelengths or a plurality of colors. The circuit apparatus includes a distortion correction circuit and an output circuit. The distortion correction circuit performs distortion correction on a color basis on display image data corresponding to the plurality of colors. The output circuit outputs the display image data as a result of the distortion correction. The distortion correction circuit performs the distortion correction on a color basis by using warp parameters different from one another among the plurality of colors.

A mixed reality direct retinal projector system that may include a headset that uses a reflective holographic combiner to direct light from a light engine into an eye box corresponding to a user's eye. The light engine may include light sources coupled to projectors that independently project light to the holographic combiner from different projection points. The light sources may be in a unit separate from the headset that may be carried on a user's hip, or otherwise carried or worn separately from the headset. Each projector may include a collimating and focusing element, an active focusing element, and a two-axis scanning mirror to project light from a respective light source to the holographic combiner. The holographic combiner may be recorded with a series of point to point holograms; each projector interacts with multiple holograms to project light onto multiple locations in the eye box.

A digital PSF for use in a dual modulation display. The invention allows the use of less than optimal point spread (PSF) functions in the optics between the pre-modulator and primary modulator of a dual modulation projection system. This technique uses multiple halftones per frame in the pre-modulator synchronized with a modified bit sequence in the primary modulator to produce a compensation image that reduces the errors produced by the sub-optimal PSF. The invention includes the application to dual modulation and dual modulated 3D viewing systems.