Abstract: A display apparatus includes a display substrate, and light emitting devices arranged on an upper surface of the display substrate. At least one of the light emitting devices includes a first LED unit including a first light emitting stack, a second LED unit including a second light emitting stack, and a third LED unit including a third light emitting stack. Each of the first to third light emitting stacks includes a first conductivity type semiconductor layer and a second conductivity type semiconductor layer. the first conductivity type semiconductor layer and the second conductivity type semiconductor layer in each of the first to third light emitting stacks are stacked in a horizontal direction with respect to the upper surface of the display substrate. At least one of the second conductivity type semiconductor layers in the first to third light emitting stacks is divided into two regions.

Abstract: A system for aperture extension and programmable optical depth modulation via a field evolving cavity includes at least one field evolving cavity (FEC) unit, at least one aperture unit, a plurality of cavity gates, and a plurality of aperture gates. The plurality of cavity gates is optically integrated into the at least one FEC unit. The plurality of aperture gates is optically integrated into the at least one aperture unit. At least one optical path traverses between at least one desired cavity gate from the plurality of cavity gates and at least one desired aperture gate from the plurality of aperture gates. The at least one FEC unit is configured to generate a desired image depth by adjusting a length of the at least one optical path.

Abstract: A projection system according to an embodiment of the present technology includes an image formation apparatus, a projection lens, a measurement apparatus, a control apparatus, and a measurement assisting apparatus. The image formation apparatus forms image light. The projection lens projects the image light. The measurement apparatus measures the image light. The control apparatus controls the image formation apparatus on the basis of output of the measurement apparatus. The measurement assisting apparatus is disposed between the image formation apparatus and the projection lens and is configured to be capable of selectively switching between a first state to cause the image light to enter the projection lens and a second state to cause the image light to enter the measurement apparatus.

Abstract: Provided are a method and a device for real-time monitoring of tunnel deformation. The monitoring method includes: S1, erecting a plurality of structured light sources in an unstable area to be monitored of a tunnel structure, and erecting a monitoring terminal in a relatively stable region of the tunnel structure, where the monitoring terminal may communicate with the plurality of structured light sources; S2, observing all structured lights in the unstable area of the tunnel structure and obtaining structured light curves in real time by the monitoring terminal; S3, analyzing imaging changes of the structured lights, detecting deformation degrees and offset distances of the tunnel in real time, and monitoring the diseases such as settlement, convergence of a single-section of the tunnel and integral settlement of a multi-section of the tunnel by the data processing unit.

Abstract: A control device of a projection system includes one or more projection apparatuses that project a first image including a plurality of marker images, and an imaging apparatus that captures at least a part of the first image, the control device includes a processor, and the processor is configured to perform a control of projecting a second image including a plurality of marker images from the projection apparatus based on a capturing result of at least the part of the first image by the imaging apparatus.

Abstract: Disclosed are improved methods, systems and devices for color night vision that reduce the number of intensifiers and/or decrease noise. In some embodiments, color night vision is provided in system in which multiple spectral bands are maintained, filtered separately, and then recombined in a unique three-lens-filtering setup. An illustrative four-camera night vision system is unique in that its first three cameras separately filter different bands using a subtractive Cyan, Magenta and Yellow (CMY) color filtering-process, while its fourth camera is used to sense either additional IR illuminators or a luminance channel to increase brightness. In some embodiments, the color night vision is implemented to distinguish details of an image in low light. The unique application of the three-lens subtractive CMY filtering allows for better photon scavenging and preservation of important color information.

Abstract: A transparent wearable data display having a source of collimated light, a deflector for deflecting the collimated light into a scanned beam, and a first of switchable grating elements sandwiched between first and second parallel transparent substrates, which together functioning as a first light guide. A first coupling is provided for directing the scanned beam into a first total internal reflection (TIR) light path of the first light guide along the first array column. The grating elements having diffracting and non-diffracting states, in their diffracting state deflecting light out of said light guide. The grating elements arc switchable into their diffracting states one group of elements at a time.

Abstract: A multiplexed light field projector device and a multiplexed light field display to output a light field image is described. The projector has a projector base with a projection optical system configured to output light rays to form a projected image, a collimating optical system configured for collimation of the projected image light rays to form a second projected image, which is directed to a display optical system to produce a light field image. Light field projector devices or alternative projector devices may be used individually or in combination with one or more other projectors which can be arranged to form a multiplexed direct projection light field display. The arrangement of projector devices may have an individual or shared display optical system.

Abstract: A projection device, a projection system and a method for calibrating projected image are provided. The projection device and an external projection device the same image source and respectively project an image and another image corresponding to the image source. The same portion of the image source where the two images overlap each other forms an overlapping area. The projection device includes a lens, a light shielding member and a processor. The light shielding member is disposed on the lens. The processor controls the light shielding member to selectively shade a partial area of the lens according to the brightness of the image source, wherein the partial area corresponds to the overlapping area.

Abstract: A method for locating a vehicle involves detecting an elevation profile of a roadway of the vehicle and in which image features on the roadway are detected as landmarks and are compared with landmarks stored on a digital map. A transformation of the detected and/or stored landmarks into a common perspective performed to compare the landmarks. The transformation is carried out based on model parameters of a parametric model of the elevation profile of the roadway and a parametric model of a vehicle inclination. The model parameters are determined by determining an expected elevation profile of the roadway from the parametric models of the elevation profile and the vehicle inclination and minimizing a difference between the expected elevation profile and the detected elevation profile by varying the model parameters.

Abstract: A light emitting device includes: at least one semiconductor laser element; a base member on which the at least one semiconductor laser element is disposed; a light-transmissive member including: an upper surface, a lower surface, and a light-transmissive region through which laser light emitted from the at least one semiconductor laser element is transmitted from the lower surface to the upper surface; and a lens member through which the laser light emitted from the at least one semiconductor laser element, the lens member being fixed to the base member or the light-transmissive member. At least the light-transmissive region is made of sapphire. The light-transmissive member includes an incident surface on which the laser light is incident, the incident surface being an a-plane of the sapphire.

Abstract: A feature surface projection system includes a projector, a camera, and a controller. The projector projects a structured light and an image beam to a feature surface at different times. The structured light forms a structured light pattern on the feature surface, and the image beam forms an image on the feature surface. The camera photographs the structured light pattern and the image at different times. The controller is electrically connected to the projector and the camera, calculates a position of a feature point of the feature surface, and determines a difference between a position of a feature point of the image and the position of the feature point of the feature surface to determine whether to adjust the image beam. A projection method for a feature surface is also provided. The feature surface projection system provides an automatic alignment function between a projected content and the feature surface.

Abstract: A controlling method for an electronic device comprises: determining a state of a housing and a usage state of the electronic device; projecting a laser in a first mode by a laser projector when the housing is in a folded state and the electronic device is in a first usage state; projecting a laser in a second mode by the laser projector when the housing is in the folded state and the electronic device is in a second usage state; and projecting a laser in a second mode by the laser projector when the housing is in an expanded state.

Abstract: A navigation system includes an IMU, a navigation estimator configured to estimate a current navigation solution based on (i) a last navigation solution, and (ii) a specific force vector and a n angular rate vector measured by the IMU, an RI sensor, an RI data preprocessor configured to: perform a priori transformations of last RI data and current RI data to obtain transformed last RI data and transformed current RI data based on the last navigation solution and the current navigation solution, respectively, an RI filter manager (RFM) configured to construct a delta pose registration cost gradient (DPRCG) measurement based on (i) the transformed last RI data, (ii) the transformed current RI data, (iii) the current navigation solution, and (iv) the last navigation solution. The navigation estimator is further configured to determine an absolute navigation solution based on at least (i) the current navigation solution, and (ii) the DPRCG measurement.

Abstract: Embodiments are directed to multi-sensor superresolution scanning and capture system. A sensing system may be employed to scan a plurality of paths across objects using beams such that the sensing system includes event sensors and image sensors and such that the image sensors are a higher resolution than the event sensors. The event sensors may be employed to provide events based on detection of the beams that are reflected by the objects. The image sensors may be employed to provide images based on the reflected the beams. Enhanced trajectories may be generated based on a plurality of first trajectories and a plurality of second trajectories such that the plurality of the first trajectories are based on the events and the plurality of paths and such that the plurality of second trajectories are based on the images and the plurality of paths.

Abstract: A coaxial laser light source apparatus includes at least one laser light source module, a beam homogenizer, and optical path adjusting elements. The laser light source module includes multiple laser light sources arranged along a first direction, and each of the laser light sources is configured to emit a laser light along a second direction. The first direction is substantially perpendicular to the second direction, and the laser lights have different properties. The laser lights travel along the second direction toward the beam homogenizer coaxially. The optical path adjusting elements are located between the laser light sources and the beam homogenizer, and the optical path adjusting elements are configured to adjust traveling directions of the laser lights.

Abstract: A projector includes: a laser light source; a shaping section configured to shape a laser light emitted from the laser light source; and a scanning section configured to two-dimensionally scan, on a screen, a laser beam shaped by the shaping section. Under a situation where a distance from an optical emitting surface of the laser beam to the screen is constant, the laser light source and the shaping section are configured to perform two-dimensional scanning of the laser beam on the screen by using a tip of the laser beam corresponding to each of cross sections at a plurality of positions of a tapered portion of the laser beam from the scanning section to a beam waist of the laser beam.

Abstract: An illumination system, including a light source module and a light uniformizing element, is provided. The light source module provides an illumination light beam. The light uniformizing element has a light incident surface and a light exit surface opposite to the light incident surface, and includes at least one light splitting surface. The light splitting surface is located inside the light uniformizing element. A normal vector of the light splitting surface is perpendicular to a central axis of the light uniformizing element. The illumination light beam is incident to the light incident surface of the light uniformizing element at an oblique angle, and the illumination light beam is split multiple times by the light splitting surface, so that the light uniformizing element outputs a uniformized illumination light beam at the light exit surface. A projection device and a light uniformizing element are also provided.

Abstract: Examples of eye-imaging apparatus using diffractive optical elements are provided. For example, an optical device comprises a substrate having a proximal surface and a distal surface, a first coupling optical element disposed on one of the proximal and distal surfaces of the substrate, and a second coupling optical element disposed on one of the proximal and distal surfaces of the substrate and offset from the first coupling optical element. The first coupling optical element can be configured to deflect light at an angle to totally internally reflect (TIR) the light between the proximal and distal surfaces and toward the second coupling optical element, and the second coupling optical element can be configured to deflect at an angle out of the substrate. The eye-imaging apparatus can be used in a head-mounted display such as an augmented or virtual reality display.

Abstract: A display device includes display panels; and a specular reflection structure that converts positions of images displayed by the display panels and merges the images at a predetermined position to generate an integrated image, wherein the specular reflection structure includes at least one specular mirror that corresponds to each of the display panels, and the at least one specular mirror converts a display direction by reflecting the images displayed on the display panels wherein a size of each of the images is maintained.

Abstract: According to one embodiment, a display device includes a first substrate, a second substrate opposing the first substrate, a wiring substrate connected to the first substrate, a cover member located on an opposite side to the first substrate so as to interpose the second substrate therebetween and a conductive layer maintained at a predetermined potential, and the first substrate includes an extension portion extending further from the second substrate, the wiring substrate is connected to the extension portion, the cover member includes a first surface opposing the extension portion, and the conductive layer overlaps the extension portion in plan view.

Abstract: The disclosure provides a method for adjusting pixel values of blending image. The method includes projecting, on a projection surface, a first projection image onto a first projection range and a second projection image onto a second projection range by a first projector and a second projector, and blending the first projection image and the second projection image to generate a blending image; calculating positions of a plurality of boundaries of the first projection range and the second projection range; adjusting a range of an overlapping area between the first projection range and the second projection range; and adjusting image parameters of a non-overlapping area outside the overlapping area, to enable pixel values of the non-overlapping area to be close to pixel values of the overlapping area.

Abstract: A display apparatus includes a display substrate, and light emitting devices arranged on an upper surface of the display substrate. At least one of the light emitting devices includes a first LED unit including a first light emitting stack, a second LED unit including a second light emitting stack, and a third LED unit including a third light emitting stack. Each of the first to third light emitting stacks includes a first conductivity type semiconductor layer and a second conductivity type semiconductor layer. the first conductivity type semiconductor layer and the second conductivity type semiconductor layer in each of the first to third light emitting stacks are stacked in a horizontal direction with respect to the upper surface of the display substrate. At least one of the second conductivity type semiconductor layers in the first to third light emitting stacks is divided into two regions.

Abstract: A wearable heads-up display has stored therein two or more distortion models for use in generating distorted source images that when projected by the wearable heads-up display into a target eye space form virtual images are aligned in the target eye space. A method and system for determining the distortion models are disclosed.

Abstract: A method of calibrating a display system, the method comprising: displaying a test pattern including a plurality of blobs; detecting one or more base blobs in the displayed test pattern; identifying, based on the detected base blobs, patches of the test pattern, wherein each patch comprises one of the base blobs and a subset of additional blobs detected in the displayed test pattern; determining a patch location for at least one patch within the test pattern based on the subset of the additional blobs in the patch to determine a blob location for at least one detected blob; determining a calibration parameter for the display system based on the blob location and a detected attribute of the at least one detected blob; and calibrating the projector using the calibration parameter.

Abstract: A direct projection light field display comprising an array of projectors for direct projection of a light field. The overall design and incorporation of additional optics achieve the optimal light distribution and small pixel size to produce a high definition, 3D display. The architecture of the direct projection light field display has low a brightness requirement for each projector, resulting in an increased projector density, decreased system, and a decreased power requirement, while producing a high-definition light field.

Abstract: An atmosphere starry sky light for festival entertainment is provided. The constellation unit is configured to switch patterns of twelve constellations and perform projection display on the patterns of the twelve constellations. The starry sky unit is configured to project a starry sky background. The background unit is configured to project patterns of aurora, clouds, and ripples. The planetary unit is configured to switch patterns of a planet, and to project and display a planetary image. The constellation unit, the planetary unit, the starry sky unit and the background unit form a panoramic image of the cosmic starry sky by superimposing and combining.

Abstract: A light source apparatus according to the present disclosure includes a first light source including a plurality of first light emitters arranged in a single row along a first direction, a second light source including a plurality of second light emitters arranged in a single row along a second direction, and a polarization combiner. The polarization combiner transmits the first luminous flux from the first light source and reflects the second luminous flux from the second light source. In an imaginary plane perpendicular to the center axis of the combined luminous flux, the direction in which the plurality of first beams are arranged in the single row and the direction in which the plurality of second beams are arranged in the single row intersect with each other, and the first luminous flux and the second luminous flux partially overlap with each other.

Abstract: An object feature visualization system is disclosed. The system may include a computing device that generates video-mapped images to project onto physical objects. The video-mapped images may include features to be projected onto the objects. The projection of a video-mapped image onto the physical object allows for the visualization of the feature on the object. In some examples, the computing device receives a feature selection for a particular object, and generates a video-mapped image with the selected feature to provide to a projector to project the video-mapped image onto the physical object. In some examples, a user is able to select one or more features for one or more objects of a room display via a user interface. The system then projects video-mapped images with the selected features onto the physical objects. The system may allow a user to save feature selections, and to purchase or request additional information about objects with selected features.

Abstract: A lighting device (1) comprising a light generating element (2; 3), and a micro-lens array (4) comprising a focal plane (Fp), wherein the light generating element (2; 3) is arranged to emit a light output towards the micro-lens array (4), wherein the lighting device (1) comprises an array of micro-logos (81-83), and wherein the array of micro-logos (81-83) is located in the focal plane (Fp) of the micro-lens array (4).

Abstract: In the subject matter described herein, a method, device and computer program product for controlling the projector are proposed. According to the method, the application for controlling the project can be started. The application can determine the operation mode by determining whether the current host device is the projector or a terminal device for controlling the projector. Once the operation mode of the application is determined, the method can control the projector based on the operation mode and via the application service operating on the projector. The application service can provide an interface for controlling a device driver of the projector.

Abstract: A light uniforming component including a light uniforming element and a frame is provided. The light uniforming element has a first side surface. The frame includes a side wall and a first elastic piece. The first elastic piece includes a first section and a second section. One end of the first section is bent and connected to the side wall. The second section is bent and connected to another end of the first section. The light uniforming element is disposed in the frame. A first fold line between the first section and the second section of the first elastic piece contacts the first side surface. A second fold line between the first section and the side wall is not perpendicular to an orthographic projection of an optical axis of the light uniforming element on the side wall. A lighting module and a projector including the light uniforming component are mentioned.

Abstract: The present embodiments relate to display of glints associated with real-world objects in an environment displayed on an extra reality (XR) device. The glint can include a virtual object associated with a real-world object, such as an indication of a social interaction associated with a real-world object, a content item tagged to an object, etc. The system as described herein can present glints on a display of an XR device based on a distance between the XR device and a location associated with the glint. Responsive to selection of a glint in the environment, additional information can be presented relating to the glint or another action can be taken, such as to open an application. In some instances, a glint can include a series of search results relating to a corresponding real-world object to provide additional information relating to the real-world object.

Abstract: A light source module includes a light source, a wavelength conversion unit, a diffuser, and a reflector. The light source is configured to emit excitation light. The wavelength conversion unit is configured to reflect the excitation light. The diffuser has a first side and a second side opposite to each other, and is configured to allow the excitation light reflected by the wavelength conversion unit to enter the diffuser from the first side and reach the second side. The reflector is configured to reflect the excitation light entering the diffuser, so that the excitation light propagates from the second side to the first side and leaves the diffuser.

Abstract: A novel projection system includes a base signal source, a highlight signal source, a base/highlight destination, and a shared optical element. A base signal provided by the base source and a highlight signal provided by the highlight source are combined by the shared optical element. In a particular embodiment, the base signal source and the highlight signal source each include a light source, a spatial light modulator, and optics, and the base/highlight destination includes optics and a spatial light modulator. In a more particular embodiment, the base signal source and the highlight source provide spatially modulated lightfields to the shared optical element. In another particular embodiment, the base signal and the highlight signal are modulated by the spatial light modulator of the base/highlight destination after being combined.

Abstract: A light source apparatus according to an aspect of the present disclosure includes a light source section that outputs light belongs to a first wavelength band, a wavelength converter that converts the light that belongs to the first wavelength band into light that belongs to a second wavelength band different from the first wavelength band, and a first optical element that reflects the light that belongs to the first wavelength band and transmits the light that belongs to the second wavelength band. A first angle of incidence of the chief ray of the light that belongs to the first wavelength band with respect to a first surface of the first optical element is smaller than 45°, and a second angle of incidence of the chief ray of the light that belongs to the second wavelength band with respect to the first surface is smaller than 45°.

Abstract: A frame processor may generate a mask based on one or more static regions of a first set of frames of a plurality of previous frame and adjust the mask to at least one of determine alpha data or conceal distorted content associated with the one or more static regions of the first set of frames. The distorted content may be caused by extrapolation of a frame from a second set of frames of the plurality of previous frames. The frame processor may generate a composite frame based on application of at least one of the mask or the alpha data to a previous frame of the plurality of frames, and application of the previous frame based on the at least one of the mask or the alpha data to the frame extrapolated from the second set of frames of the plurality of previous frames.

Abstract: An information handling system includes adjacent displays connected by a hinge. A processor renders a first image on the first display, renders a second image on the second display, and receives data representing a misalignment between the first display and the second display. The data is implemented to compensate for the misalignment between the first display and the second display.

Abstract: A projection system and a projection method are provided. The projection system includes a first projector and a second projector. A first projection image projected by the first projector and a second projection image projected by the second projector are partially overlapped. A projection region edit menu is executed to display multiple adjustment points and multiple connecting lines on the first projection image. A position of a selected adjustment point among the multiple adjustment points and positions of two connecting lines connected to the selected adjustment point among the multiple adjustment points displayed on the first projection image are changed according to a first moving instruction to select a closed region formed by the multiple connecting lines in a non-overlap region of the first projection image. The projection method is adapted to the projection system that provides a blending projection effect of multiple projectors having an even brightness.

Abstract: A multiplexed light field projector device and a multiplexed light field display to output a light field image is described. The projector has a projector base with a projection optical system configured to output light rays to form a projected image, a collimating optical system configured for collimation of the projected image light rays to form a second projected image, which is directed to a display optical system to produce a light field image. Light field projector devices or alternative projector devices may be used individually or in combination with one or more other projectors which can be arranged to form a multiplexed direct projection light field display. The arrangement of projector devices may have an individual or shared display optical system.

Abstract: An apparatus for concentrating light from a light source includes a plurality of fibers that are substantially parallel with one another. Each fiber includes a light-receiving end and a light-transmitting end. The light-receiving end is configured to receive the light from the light source. The light-transmitting end is configured to transmit the light from the fiber. The light-receiving ends the fibers extend different distances from a plane that is perpendicular with respect the fibers.

Abstract: A high laser damage threshold reflective optically addressed liquid crystal spatial light modulator for shaping 1053 nm linearly polarized light beams, comprising a computer-controlled LCoS electrical addressable spatial light modulator, polarization beam splitter, and polarizer, Liquid crystal cell, analyzer, AC power supply, where the liquid crystal cell comprises a transparent conductive film antireflection film layer, a transparent conductive film base layer, a first transparent conductive layer, a liquid crystal alignment layer, a liquid crystal layer, an alignment element, a reflective film layer, a light guide layer, and a second transparent conductive layer. By changing the transparent conductive layer material of the light-transmitting part of the liquid crystal cell from ITO to gallium nitride material, the damage threshold of the high-energy laser is improved, which facilitates application of beam shaping in high-power laser devices.

Abstract: A light source apparatus includes a plurality of light emitting apparatuses. Each of the light emitting apparatuses includes a plurality of light emitting devices each of which has a light emitting area and a non-light emitting area on an emission surface thereof that emits light. At least two light emitting apparatuses of the light emitting apparatuses constitute a light emitting apparatus group disposed such that the emission surfaces of the respective light emitting apparatuses are parallel to each other with a predetermined distance, and that a distance between light emitting areas of the respective light emitting apparatuses when viewed along a direction perpendicular to the emission surfaces of the at least two of the light emitting apparatuses is shorter than a distance between the light emitting areas of the respective light emitting apparatuses when the emission surfaces of the respective light emitting apparatuses are on the same plane.

Abstract: An active-pixel device assembly with stray-light reduction includes an active-pixel device including a semiconductor substrate and an array of active pixels, a light-transmissive substrate disposed on a light-receiving side of the active-pixel device, and a rough opaque coating disposed on a first surface of the light-transmissive substrate and forming an aperture aligned with the array of active pixels, wherein the rough opaque coating is rough so as to suppress reflection of light incident thereon from at least one side. A method for manufacturing a stray-light-reducing coating for an active-pixel device assembly includes depositing an opaque coating on a light-transmissive substrate such that the opaque coating forms a light-transmissive aperture, and roughening the opaque coating to form a rough opaque coating, said roughening including treating the opaque coating with an alkaline solution.

Abstract: The tiling screen (screen) is provided with a plurality of projection areas, and includes an overlapping area where end parts of the projection areas overlap each other, wherein when setting a number of times of overlapping to one in the overlapping area, reflectance in the overlapping area where the number of times is one is configured to be lower than reflectance in an area where the projection areas fail to overlap each other, and when setting the number of times of overlapping to N (N?2) in the overlapping area, the reflectance in the overlapping area where the number of times is N is configured to be lower than the reflectance in the overlapping area where the number of times of overlapping is a largest number of the numbers of times smaller than N.

Abstract: Disclosed in the present application are a quantum dot LED, a manufacturing method thereof, and a display device, belonging to the technical field of LED light sources. The quantum dot LED includes an LED support, an LED chip, a filling layer, and a quantum dot layer, where the LED support comprises a chamber; the LED chip is arranged on a bottom surface of the chamber; the filling layer covers the bottom surface of the chamber and the LED chip, and is engaged with walls of the chamber; and the quantum dot layer is arranged at an opening on a top surface of the chamber, a light incident side of the quantum dot layer abuts against a surface of the filling layer away from the bottom surface of the chamber, and a shortest distance h between the LED chip and the quantum dot layer meets h?0.03 mm.

Abstract: An optical module and a projection apparatus using the optical module are provided. The optical module includes a base, a first frame, an optical element and at least one driving assembly. The first frame is disposed in the base. The optical element is disposed in the first frame. The at least one driving assembly is disposed between the base and the first frame. The first frame is configured to move relative to the base by a magnetic force generated by the at least one driving assembly. Each of the at least one driving assembly includes a coil and a Halbach array magnet structure, the coil and the Halbach array magnet structure face each other along a first direction, a width of the Halbach array magnet structure in the first direction is W1, and a width of the coil in the first direction is W2, and 0.7?W1/W2?2.

Abstract: An optical device including a bearing structure and a light-transmitting plate body is provided. The bearing structure includes a first frame body and a second frame body connected to each other, and the first frame body is located in the second frame body. The first frame body has at least one first inner surface, and the at least one first inner surface has at least one limiting protruding portion protruding from the at least one first inner surface. The light-transmitting plate body is disposed in the first frame body and is fixed to the first frame body. The light-transmitting plate body has at least one first edge, and the at least one first edge of the light-transmitting plate body is positioned through the at least one limiting protruding portion.

Abstract: An optical module includes: a light emitting unit configured to generate light; a mirror mechanism configured to reflect the light generated by the light emitting unit; and a scanning unit configured to scan the light reflected from the mirror mechanism. The light emitting unit includes: a light forming unit including a plurality of semiconductor light emitting elements and a filter that multiplexes light beams from the plurality of semiconductor light emitting elements; and a protective member disposed so as to surround the light forming unit. The mirror mechanism is disposed outside the protective member and integrated with the protective member, and the scanning unit is disposed in a region surrounded by the protective member.

Abstract: Methods and systems are provided for automatically selecting a target area to project content thereon. For example, a projection device receives content to be projected and content attributes of the content. The projection device also captures images of candidate areas and determines candidate area characteristics based on the captured images. The projection device generates a respective quality-of-projection indicator based on the content attributes and the candidate area characteristics. The projection device selects the candidate area with the highest quality-of-projection indicator as the target area on which the content is to be projected.