Abstract: An embodiment for adjusting digital content in a flexible display device is provided. The embodiment may include receiving data relating to a position and orientation of a reference device relative to a user. The embodiment may also include identifying an orientation of a display surface of a mobile device and a relative position of the mobile device relative to a viewing direction of the user. The embodiment may further include identifying an optimal viewing angle of display content on the display surface of the mobile device. The embodiment may also include in response to determining the display content is not able to be displayed as a hologram, aligning the display content as text based on the optimal viewing angle. The embodiment may further include presenting the aligned display content as text to the user.

Abstract: An optical element includes a first multi-lens surface and a second multi-lens surface. The first multi-lens surface has m areas arranged in an array, the m areas including a plurality of first cells. The second multi-lens surface has m second cells arranged in an array, the m second cells corresponding to the m areas. Light enters the first multi-lens surface. The light is emitted from the second multi-lens surface. The m areas of the first multi-lens surface each have n first cells. A focal plane of the m second cells is located at an emission side of the n first cells. The number m is a natural number no smaller than 2, and the number n is a natural number no smaller than 2.

Abstract: A laser despeckle device includes a light source, a despeckle element, and a plurality of optical transmission modules. The light source is configured to emit a laser light. The despeckle element is disposed along the optical axis of the laser light. The optical transmission modules alternatively disposed at two opposite sides of the despeckle element.

Abstract: The present invention provides a projector including a laser module and a lens module, wherein the lens module includes a plurality of lens and a plurality of diffractive optical elements. In the operations of the projector, the laser module is arranged to generate at least one laser beam; each of the lenses is arranged to receive one of the at least one laser beam to generate a collimated laser beam; and the diffractive optical elements correspond to the lenses, respectively, and each of the diffractive optical elements is arranged to receive the collimated laser beam from the corresponding lens to generate an image. The images generated by the diffractive optical elements form a projected image of the projector. By using the projector of the present invention, the projected image may have higher resolution or field of view that is advantageous for the 3D sensing system.

Abstract: A light source apparatus includes a first light source configured to emit first color light, a second light source configured to emit second color light having a different wavelength from that of the first color light, a wavelength conversion element configured to convert the first color light into third color light having a wavelength different from that of the first color light and to emit the third color light, and to emit the second color light as it is, and an optical system including a light guide surface configured to guide the first color light from the first light source and the second color light from the second light source to the wavelength conversion element, and the optical system being configured to emit combined light of the second color light and the third color light from the wavelength conversion element.

Abstract: The present invention relates to a head up display system, in particular for a motor vehicle, comprising: a picture generating unit having a picture projection optics, a tilted mirror and an intermediate image plane, wherein light from the picture projection optics is deflected by the mirror toward the backside of the intermediate image plane, and an optical lens and/or mirror arrangement for magnifying and/or conveying a picture generated on the intermediate image plane to an optical combiner, wherein a pair of prisms is inserted in the optical path between the tilted mirror and the intermediate image plane to eliminate or mitigate specific light beams emanating from the intermediate image plane and traveling toward the tilted mirror and/or specific light beams emanating from the intermediate image plane already being reflected from the tilted mirror and traveling back toward the intermediate image plane.

Abstract: An optical device includes a transmitter, which emits a beam of optical radiation, and a receiver, which includes a detector configured to output a signal in response to the optical radiation. An active area of the detector has a first dimension along a first axis and a second dimension, which is less than the first dimension, along a second axis perpendicular to the first axis. An anamorphic lens, which collects and focuses the optical radiation onto the active area of the detector, has a first focal length in a first plane containing the first axis and a second focal length, greater than the first focal length, in a second plane containing the second axis. A scanner scans the beam across a target scene in a scan direction that is aligned with the first axis, and directs the optical radiation that is reflected from the target scene toward the receiver.

Abstract: A projection device and a light source module having a light transmitting region and a non-light transmitting region, and including a base, a light-emitting element, a collimating lens, an adhesive, and a light-shielding member are provided. The light-emitting element is disposed on the base at a position corresponding to the light transmitting region for providing a light beam. The collimating lens is disposed on the base. The adhesive is disposed on the base at a position corresponding to the non-light transmitting region, and located between the collimating lens and the base to bond the collimating lens and the base. The light-shielding member is disposed in the non-light transmitting region and covers a part of the collimating lens. A projection of the light-shielding member and a projection of the adhesive on the base at least partially overlap. The light source module and the projection device have good reliability.

Abstract: A speckle elimination apparatus, a laser light source and a laser projection system, the speckle elimination apparatus comprising a diaphragm (100) and a ¼ wave plate group sequentially arranged on a laser beam optical path, the ¼ wave plate group comprising a first ¼ wave plate (200) and a second ¼ wave plate (300) having optical axis angles of 75°-105°, adjacent sides of the first ¼ wave plate (200) and the second ¼ wave plate (300) being closely arranged, the first ¼ wave plate (200) being arranged so as to allow a portion of an incident laser beam to pass through, the second ¼ wave plate (300) being arranged so as to allow the remainder of the incident laser beam to pass through, the portion of the incident laser beam being 25%-75% of the incident laser beam. The speckle elimination apparatus eliminates the phenomenon of laser speckle.

Abstract: A projection device is provided. An excitation light source of the projection device emits a first light beam incident to a light wavelength conversion wheel along a first direction. The light wavelength conversion wheel outputs the first light beam at a first timing, and converts the first light beam into a second light beam to be outputted at a second timing. The second light beam exits the light wavelength conversion wheel along a second direction. The first and second light beams sequentially penetrate a color filter wheel and a light homogenizing element, so that an illumination system outputs an illumination beam. The illumination beam is incident to a light valve along a third direction to be converted into an image beam. The image beam exits the light valve along a fourth direction. The first to fourth directions are different from each other and are located on a same plane.

Abstract: An autofocus projection apparatus having focal-length fine adjustment is disclosed. A projection light engine including the same is also disclosed. The autofocus projection apparatus comprises a projection lens system, which comprises a first lens group, a second lens group, an aperture stop, a third lens group and a forth lens group arranged from a long conjugate side to a short conjugate side; a stepper motor, a control board, and a time-of-flight (TOF) distance measurement module; wherein the stepper motor is connected to an inner barrel for enclosing the second group lens through an adjustment level and only moves the second lens group for autofocus adjustment based on projection distances measured by the TOF distance measurement module. A 3D TOF module which includes a modulated flash light emitter and a CMOS camera sensor, can be used for automatic keystone correction as well as autofocus distance detection in the projection light engine.

Abstract: A homogenizer includes a convex-lens array pair including a first convex-lens array disposed on a light entrance side and a second convex-lens array disposed on a light emission side. The first convex-lens array and the second convex-lens array are disposed so as to face each other such that each of the convex-lens arrays has a lens surface opposed to each other outward or inward. The first convex-lens array includes a plurality of first convex lenses in an array arrangement. The second convex-lens array includes a plurality of second convex lenses in an array arrangement. The first convex lens has an average internal transmission angle for incident light entering a lens-surface center region in the lens cross-section and being in parallel with the symmetry axis being equal to or more than 1.3 times an average internal transmission angle of a spherical convex lens.

Abstract: A projector according to the present disclosure includes an illuminator that outputs light, a light modulator including a liquid crystal panel that modulates the light from the illuminator in accordance with image information, and a projection optical apparatus that projects image light modulated by the light modulator. The liquid crystal panel includes a display unit on which the light from the illuminator is incident, a light blocking film having a light transmissive area provided in correspondence with the display unit, and a lens that collects the light into a spot in the light transmissive area. The display unit has a first area and a second area in the light transmissive area, the second area providing light transmittance higher than light transmittance provided by the first area. The illuminator outputs the light in such a way, that the lens collects the light into a spot in the second area.

Abstract: A first illumination light source emits a first illumination light ray which is a first polarized light. Either one of an s-polarized light and a p-polarized light, which are linearly polarized light, is the first polarized light and the other is a second polarized light. A second illumination light source emits a second illumination light ray. A dichroic mirror includes a specific polarization reflection area and a transmission area. The specific polarization reflection area reflects the first polarized light and transmits the second polarized light and the second illumination light ray. The transmission area transmits the first and second illumination light rays. A phase difference plate converts linearly polarized light into circularly polarized light. A polarization conversion element transmits either the first or second polarized light, shifts an optical axis of the other, and aligns the first and second illumination light rays to the first or second polarized light.

Abstract: A high-efficiency lighting system for an LCD projectors, comprises an LED light source, a condensing device, a collimator lens, a quarter wave plate, and a brightness enhancement type polarizer, an LCD light valve, a field lens and projection lens which are provided in sequence according to a direction of a light travel; wherein the LED light source comprises a thermally conductive substrate, and a light-emitting area is provided on the thermally conductive substrate, a plurality of light-emitting chips are provided on the light-emitting area, and a gap is provided between two adjacent light-emitting chips; a reflective film for reflecting light is provided on an area which is in the light-emitting area and outside the light-emitting chips. The present invention achieves a significant improvement in the lighting efficiency of the projector, and outputs the same brightness.

Abstract: There is provided a microlens array diffuser plate including: a microlens group positioned on a surface of a transparent substrate. The microlens group at least corresponding to a light ray entering part in the microlens array diffuser plate includes two or more unit cells that are continuous in an array sequence, and the unit cells include a plurality of microlenses positioned on the surface of the transparent substrate. The light ray entering part has at least two regions having different average diffusion angles.

Abstract: A light source device according to the present disclosure includes a plurality of light emitting elements, a diffusion element which light beams including a plurality of beams emitted from the plurality of light emitting elements enter, and which diffuses the light beams, and an optical element configured to divide the light beams emitted from the plurality of light emitting elements into plurality of partial light beams, wherein the diffusion element has a plurality of diffusion areas disposed so as to correspond to the plurality of partial light beams obtained by the optical element dividing the light beams emitted from the plurality of light emitting elements.

Abstract: A reflected light projection device is provided, comprising a projection light source assembly, a light source fixing plate for fixing the projection light source assembly, a rotatable reflector cup, a dust-proof light-transmitting sheet, and a motor driving the reflector cup to rotate. The dust-proof light-transmitting sheet, the reflector cup, the light source fixing plate, and the projection light source assembly are sequentially stacked and arranged on the motor, and the projection light source assembly, the light source fixing plate, and the reflector cup are respectively provided with a first opening, a second opening, and a third opening through which the motor passes, and a light emitted by the projection light source assembly directly irradiates the reflector cup that rotates under a drive of the motor, and the light is reflected by the reflector cup and then projected to a surface of an external medium through the dust-proof light-transmitting sheet.

Abstract: A display apparatus includes a display device and an optical element. The display device is configured to project an image beam to a first diaphragm. The optical element is disposed on the transmission path of the image beam. The optical element includes a second diaphragm, the second diaphragm is located on one side of the first diaphragm, and the first diaphragm is located between the second diaphragm and the display device. The area of the second diaphragm approximates the area of the first diaphragm. The image beam passes through the first diaphragm and the second diaphragm and is projected to a projection target.

Abstract: It is an object to provide a technique of achieving a high in-plane mounting density of a laser light source element and capable of adjusting a position of a lens for each laser light source element with a high degree of accuracy. A laser light source apparatus 1 includes: a base; a plurality of semiconductor laser elements; a plurality of lenses parallelizing laser light being output from the plurality of laser light source elements; a spacer disposed on the upper surface of the base; and an adhesive agent fixing the plurality of lenses to the spacer. The spacer includes, for each of the lenses, an annular support surface and a wall, and the wall has a clearance groove formed along a direction connecting diagonal points of the lattice points.

Abstract: A projection device and a headlight for vehicle are provided. The projection device includes a light source, a light valve and a projection lens. The light source is used to emit a light beam. The light valve is located at the downstream of an optical path of the light source. The projection lens is located at the downstream of an optical path of the light valve and has an optical axis. The light valve is located on the optical axis of the projection lens and is tilted with respect to the projection lens to form an acute angle with the optical axis. The projection lens is used for projecting the light beam on a first projection surface and a second projection surface.

Abstract: The present invention provides an optical projection system with microlens arrays. The optical projection system includes a light source, a collimating lens, a first microlens array, a projection source, a positive lens module, a second microlens array and a receiving surface which are arranged in sequence. The first microlens array includes n first microlens units arranged in an array. The projection source includes n projected image units arranged in an array. The second microlens array includes n second microlens units arranged in an array. The first microlens unit and the second microlens unit which are opposite to each other have a common optical axis. According to the system of the present invention, sub-real image units can be compounded and superposed on the receiving surface, such that optical crosstalk between adjacent optical channels can be avoided.

Abstract: Devices for applying vibration and/or sliding motion to speckle diffusers are provided. A speckle diffusion device comprises at least one speckle diffuser element, one free form torsion spring with an axis of rotation, and at least one actuator. One end of the torsion spring includes an interaction element to interact with the actuator. The actuator actuates motion of the speckle diffusion element via the interaction element attached to the spring. The spring may also limit motion of the speckle diffuser element. The speckle diffusion device may be implemented or employed in various optical systems/devices. The speckle diffusion device may be easily adapted to accommodate various systems with various dimensions and geometry. Other embodiments may be disclosed and/or claimed.

Abstract: The invention provides a lens module. The lens module is disposed on a transmission path of a beam to expand the beam. The lens module includes a first lens assembly and a second lens assembly. The first lens assembly is disposed on the transmission path of the beam, and the first lens assembly has a first equivalent focal length. The second lens assembly is disposed on the transmission path of the beam from the first lens assembly, and the second lens assembly has a second equivalent focal length. The second equivalent focal length is greater than or equal to the first equivalent focal length. The invention also provides a projection device including the lens module. The lens module and the projection device of the invention can provide a projection image with uniform color distribution.

Abstract: There is provided a method to manufacture a diffuser plate with better productivity and exhibiting an excellent diffusion property and having excellent durability with respect to light having large coherence, the microlens array diffuser plate including: a microlens group positioned on a surface of a transparent substrate. The diffuser plate includes two or more unit cells that are continuously set in array, the unit cell includes a plurality of microlenses positioned on the surface of the transparent substrate, and ridge lines between the microlenses adjacent to each other are nonparallel to each other, and are nonparallel to the transparent substrate.

Abstract: Systems and methods for narrow collimating and diffused lighting, such as narrow collimating and diffused linear LED lighting. In one embodiment, a stacked arrangement including an optical sheet is arranged to receive a light pattern from a LED light to produce a narrower light pattern with diffusion. In one aspect, the optical sheet is a lenticular sheet of microscopic lines.

Abstract: A display assembly includes at least two display devices and two image compensating elements at a juxtaposition of every adjacent two display devices. Each display device includes a front surface that is viewed by user. Each front surface defines a display area and a border area. Each image compensating element is on the front surface. Each image compensating element includes a first part and a second part independent from each other, the first part is closer to the border area than the second part. Each of the first part and the second part includes a plurality of light guiding channels extending along a direction from a light-incident surface toward a light-emitting surface.

Abstract: A collimator lens in use for a vehicle lighting apparatus includes: an incident surface which allows incident light to become primary light that passes through an inside of the collimator lens; and an emission surface that is configured to emit secondary light parallel to an optical axis of the collimator lens, wherein a diffusion angle of a horizontal component of the primary light is larger than a diffusion angle of a component in a vertical direction of the primary light.

Abstract: A light source device includes a light source unit configured to emit light of a first wavelength band, a light guide unit, a wavelength conversion unit configured to convert the light emitted from the light source unit into light of a second wavelength band different from the first wavelength band, and a diffusion unit configured to diffuse the light emitted from the light source unit. The light guide unit includes a first portion and a second portion. The first portion is configured to guide a part of the light emitted from the light source unit to the wavelength conversion unit, to guide remainder to the diffusion unit, and to guide light from the diffusion unit to a system in a subsequent stage. The second portion is configured to guide light from the wavelength conversion unit to the system in the subsequent stage.

Abstract: An illumination system configured to provide an illumination beam and including an excitation light source and a wavelength conversion module is provided. The excitation light source is configured to emit an excited beam. The wavelength conversion module is located on a transmission path of the excited beam, and has an annular wavelength conversion region. A first part of the excited beam is incident to the annular wavelength conversion region and converted into a first color light, and a second part of the excited beam is incident to the wavelength conversion module to form a second color light. A proportional value range of the second part of the excited beam and the excited beam ranges between 5% and 30%. Moreover, a projection apparatus is also provided. The illumination system of the invention has a simple structure and a concise optical path layout.

Abstract: An optical member includes a curved portion comprising an optically transmissive material. The enclosure has an outer surface and an inner surface opposite the outer surface. At least one light redirection feature protrudes from the inner surface. At least one indentation defined on the outer surface is configured to refract light.

Abstract: Provided is to a vehicle lamp capable of ensuring a high sense of unity when a plurality of lamp units are arranged based on a shape of an outer optical member. The vehicle lamp includes a light source unit for generating light, a first optical member in which a plurality of incident optics are disposed on an incident surface, a second optical member in which a plurality of emitting optics are disposed, and a shield unit disposed between the plurality of incident optics and the plurality of emitting optics. In particular, a first side of the incident surface and the emitting surface is formed to be closer to the light source unit than a second side of the incident surface and the emitting surface to allow the incident surface and the emitting surface to be inclined.

Abstract: A lens array includes: an input-lens collective body, which is a collective body of input lenses each having a different optical power in a first direction and in a second direction orthogonal to the first direction, the input lenses being aligned along the second direction for which the input lenses have a larger optical power; and an output-lens collective body, which is a collective body of output lenses each having a different optical power in the first direction and in the second direction orthogonal to the first direction, the output lenses being optically opposed to the input lenses, and being aligned along the second direction. Respective lens dimensions of the input lenses are defined so that the input-lens collective body forms a predetermined irradiated region in the irradiated plane by a collection of irradiated areas of light irradiated from the lens array.

Abstract: The present disclosure is directed to inventive methods and apparatus for lighting control and for providing effects upon activation/deactivation. For example, various methods and apparatus are described for controlling various selected properties of light emitted by an LED-based lighting unit (100) with multiple LEDs (102) using, for example, a dimmer switch (101) and/or a predefined sequence of energizing LEDs.

Abstract: A fly-eye lens includes: an incident lens assemblage comprising a plurality of incident lenses that are aligned in a vertical direction, wherein each of the incident lenses has a quadrangular shape, wherein horizontal lens widths of the incident lens are the same, and wherein vertical lens widths of at least some of the incident lens are different from one another; and an emission lens assemblage comprising a plurality of emission lenses that are aligned in the vertical direction so as to be optically opposed to the incident lenses, wherein each of the emission lenses has a quadrangular shape, and wherein horizontal lens widths of the emission lenses lens are the same.

Abstract: A projector includes a light source unit having a first light source emitting first wavelength range light and a luminescent wheel having a first wavelength range light transmission area and a luminescent material area receiving the first wavelength range light and reflecting second different wavelength range light provided circumferentially end to end, a light source control unit controlling the light source unit, a display device receiving light from the light source unit to form image light, a pixel shifting unit shifting a display position of the image light for each of a plurality of sub-frame periods forming one image frame period, and a control unit controlling the light source control unit and the pixel shifting unit, the control unit synchronizing a timing the pixel shifting unit shifts the display position for each sub-frame period with a timing the emitted light from the light source unit is switched over.

Abstract: An illumination system and a projection device using this illumination system are provided. The illumination system is adapted to provide an illumination light beam. The illumination system includes a plurality of light emitting element package structures and a light condensing element. The light emitting element package structures are adapted to provide a plurality of excitation light beams, respectively. The light condensing element is disposed on transmission paths of the excitation light beams. Each of the light emitting element package structures includes a substrate, a plurality of light emitting chips, and a package lens. The light emitting chips are disposed on the substrate. The package lens is disposed on the substrate and covers the light emitting chips. Each of the package lenses includes a plurality of lens units, and the lens units in each of the package lenses are integrally connected to cover the light emitting chips.

Abstract: A projection apparatus including an image device and an illumination system is provided. The image device is configured to convert an illumination beam into an image beam. The illumination system includes an illumination light source, a diffusion device and a light uniform device. The illumination light source provides the illumination beam. The illumination beam is transmitted to the image device through the diffusion device and the light uniform device sequentially. The image beam leaves the projection apparatus and converges at a stop. The stop is located outside the projection apparatus. The image beam on the stop has desirable uniformity of an energy intensity distribution.

Abstract: A projection display device includes a light source part including a first light source part that emits first color light and a second light source part that emits second color light having an emission intensity distribution different from that of the first color light, an image generator that generates an image on a basis of light emitted from the light source part, and a projection lens that projects the light outputted from the image generator onto a projection surface and has a projection optical axis that is shifted from a reference optical axis of the device as a whole. An emission optical axis of the first light source part is shifted to a direction opposite to a direction of the projection optical axis having been shifted.

Abstract: An illumination device includes a light source section, an optical element, and a driver. The light source section includes a laser light source. The optical element includes a periodic structure, and is disposed in an optical path of light emitted from the light source section. The driver vibrates the optical element to cause a vibration direction to be inclined to a periodic direction of the periodic structure of the optical element.

Abstract: Disclosed are a dual-view naked-eye 3D display device and a method for manufacturing the same, and a liquid crystal display device. The dual-view naked-eye 3D display device includes a thin film transistor (TFT) substrate, a diffraction grating provided on the TFT substrate, a liquid crystal layer provided on the diffraction grating, a polarizer provided on the liquid crystal layer, and a light source for emitting light to the TFT substrate. The TFT substrate includes a plurality of pixel units arranged in an array, the diffraction grating in each pixel unit having two grating patterns, and the extending directions of the light-shielding strips of the two grating patterns being at a predetermined angle.

Abstract: A projector including an illumination system, a light valve and a projection lens is provided. The illumination system is configured to provide an illumination beam, and includes a light source and a diffusion element. The light source is configured to provide an exciting beam. The diffusion element is located on a transmission path of the exciting beam, and configured to receive the exciting beam for outputting at least part of the illumination beam. The diffusion element includes at least one first diffusion region and at least one second diffusion region surrounding the first diffusion region. A haze of the first diffusion region is greater than a haze of the second diffusion region. The light valve is located on a transmission path of the illumination beam, and configured to convert the illumination beam into an image beam. The projection lens is located on a transmission path of the image beam.

Abstract: The present invention is to provide a method of precisely comparing and positioning speckle patterns, which calculates light intensities of the speckle patterns, is capable of enhancing positioning accuracy of the speckle patterns, and is applicable to various navigation input devices for various types of notebook computers, multi-function keyboard and TV remote control.

Abstract: A projector and a wavelength conversion device thereof are provided. The wavelength conversion device includes a wavelength conversion element and a diffusion element. The wavelength conversion element includes a first substrate and at least one wavelength conversion layer. The at least one wavelength conversion layer is disposed on the first substrate and surrounding an axle center of the first substrate. The at least one wavelength conversion layer is configured to perform a conversion on a light beam. The diffusion element is connected to the first substrate of the wavelength conversion element and surrounding the axle center of the first substrate. The diffusion element is configured to allow another light beam to pass through.

Abstract: A light source assembly includes a substrate, a fixing base, an adjusting frame, an adjusting plate and a lens plate. The substrate includes a plurality of light-emitting units. The fixing base is fixed onto the substrate and comprising a bottom and at least one wall, wherein a recess is formed at least by the bottom and the at least one wall. The adjusting frame is movably disposed in the recess and having an opening. The adjusting plate is movably disposed in the opening of the adjusting frame. The lens plate is fixed onto the adjusting plate and includes a plurality of lenses, wherein a plurality of first through-holes are formed in the bottom of the fixing base and a plurality of second through-holes are formed in the adjusting plate such that the plurality of light-emitting units are exposed from the adjusting plate.

Abstract: An optical wheel device according to the present invention includes a first wheel on one side of which a luminescent material layer is disposed, a second wheel disposed on the other side of the first wheel, a first opening portion provided on the first wheel or the second wheel to be situated near a center of rotation, a second opening portion provided further radially outwards than the first opening portion, a communication passage formed between the first wheel and the second wheel to establish a communication between the first opening portion and the second opening portion, a motor configured to rotationally drive the first wheel and the second wheel, and a drive control device configured to control driving of the motor.

Abstract: The lamp for a vehicle includes a light source part including a light source, a first lens part including a plurality of micro incidence lenses on which light generated from the light source part is incident, a second lens part including a plurality of micro emitting lenses each corresponding to the micro incidence lenses, and a shield part disposed between the first lens part and the second lens part. The shield part includes a plurality of shields configured to block some of the light incident from the micro incidence lenses on the micro emitting lenses. In particular, a center line of the second lens part is disposed to be spaced apart from a center line of the first lens part in at least one of a side direction or a downward direction.

Abstract: An illumination system includes an excitation light source and a wavelength conversion element. The excitation light source provides an excitation beam. The wavelength conversion element has a wavelength conversion region, a reflective region, and a light transmissive region. The wavelength conversion region and the reflective region form an annular region. The light transmissive region is surrounded by the annular region, wherein the excitation beam passes through the light transmissive region of the wavelength conversion element. The illumination system of the disclosure is small in size and achieves favorable optical efficiency. A projection device including the illumination system is also provided.

Abstract: A system configured to be mounted to a vehicle, the system including a display viewable over a predetermined range of distances and a motion sensor configured to detect speeds of one or more vehicles within the predetermined range of distances of the display. The system may receive, via the motion sensor, the speeds of the one or more vehicles and based at least in part on the speeds of the one or more vehicles relative to a threshold speed may display first image data or second image data.

Abstract: The present invention relates to optical imaging devices and methods for reading optical codes. The image device comprises a sensor, a lens, a plurality of illumination devices, and a plurality of reflective surfaces. The sensor is configured to sense with a predetermined number of lines of pixels, where the predetermined lines of pixels are arranged in a predetermined position. The lens has an imaging path along an optical axis. The plurality of illumination devices are configured to transmit an illumination pattern along the optical axis, and the plurality of reflective surfaces are configured to fold the optical axis.