Abstract: An imaging system, including a light valve and a projection lens, is provided. The projection lens has a reduction side and a magnification side, and includes a lens group and a convex mirror. The light valve is configured on the reduction side. The projection lens is configured to image the beam from the light valve on a projection surface, and the projection surface is configured on the magnification side. There is an included angle between the projection surface and a light receiving surface. The lens group is configured on an optical path between the magnification side and the reduction side, and includes first to seventh lens elements sequentially arranged from the magnification side to the reduction side. The refractive powers of the first to seventh lens elements are respectively negative, negative, positive, positive, negative, positive, and positive. The convex mirror is configured on an optical path between the lens group and the magnification side.

Abstract: A method for automatic keystone correction in a projection system is provided that includes rectifying a first image to be projected using current keystone correction parameters to generate a first rectified image, projecting, by a projector in the projection system, the first rectified image on a projection surface, determining whether or not current keystone correction parameters are providing sufficient keystone correction after the first rectified image is projected, rectifying a second image to be projected using the current keystone correction parameters to generate a second rectified image if the current keystone correction parameters are providing sufficient keystone correction, computing new keystone correction parameters if the current keystone correction parameters are not providing sufficient keystone correction and rectifying the second image to be projected using the new keystone correction parameters to generate the second rectified image, and projecting, by the projector, the second rectified

Abstract: A projection system and a projection method are provided. The projection system includes a first projector and a second projector. The first projector is configured to project a first grid picture onto a projection surface. The second projector is configured to project a second grid picture onto the projection surface. The second grid picture and the first grid picture are blended into a blended projection picture. The first grid picture includes a first overlap region. Grid lines of the first overlap region are displayed in a first color. The second grid picture includes a second overlap region. Grid lines of the second overlap region are displayed in a second color. The first color and the second color are complementary colors. When the blended projection picture is formed, grid lines of an overlap region of the first grid picture and the second grid picture are displayed in a recognition color.

Abstract: A lamp projecting a starry sky is provided. The lamp projecting the starry sky includes at least one beam generator, a reflecting member with uneven and irregular reflecting surface, a first motor, and at least one first lens. The first motor is connected to the reflecting member through a connecting shaft, the reflecting member is driven to rotate when the first motor rotates, a light beam generated by the beam generator irradiates onto a first side of the reflecting member along an incident light path, and a light beam emitted from the reflecting member forms a moving and layering nebula projection after passing through the at least one first lens. In the lamp, after passing from the reflecting member, the light beam is magnified by the lens, so that the generated starry sky will not be too bright and dazzling, which effectively enhances the layering sense of the starry sky.

Abstract: A projector system including an awning bar having an awning bar body having a length extending between a first end and a second end. The projector system includes a projector having a projection lens. The projector is attachable to the awning bar along the length. The awning bar is configured to attach to a portion of an awning canopy such that the projection lens is located below the awning canopy when the awning canopy is in an open position.

Abstract: A near-eye display apparatus is disclosed. The near-eye display apparatus includes a lens and an optical path folding assembly. The lens is configured to receive incident light of a first image, which is projected by a micro-display, and shape the first image; the lens includes a primary optical axis and a first lens face and a second lens face which are opposed in a first direction where the primary optical axis of the lens is positioned, and both the first lens face and the second lens face are aspheric surfaces; and the optical path folding assembly is configured to receive light of the first image shaped by the lens and fold an optical path from the lens to an exit pupil of the near-eye display apparatus. By adopting the bi-aspherical lens, image quality of the near-eye display apparatus can be improved and the volume can be reduced.

Abstract: A homogenizing element includes a light incident end, a light exit end, a first surface, a second surface, a reflective layer and a first dichroic layer. The first surface extends from the light incident end to the light exit end. The second surface extends from the light incident end to the light exit end, and the second surface overlaps the first surface and is non-parallel to the first surface. The first dichroic layer is disposed on the first surface and configured to allow a first beam to pass therethrough and reflect a second beam. The reflective layer is disposed on the second surface and configured to reflect the first beam. A projection device adopting the homogenizing element is also provided. The homogenizing element and the projection device provided can adjust the beam angles of different color beams respectively.

Abstract: A rotation-type optical module includes a driving element, a turntable, an optical material, a balancing ring, and a first weight substance. The driving element includes a body and a rotating shaft body. The turntable is sleeved on the rotating shaft body and includes a first surface and a second surface. The optical material is disposed on the first surface of the turntable. The balancing ring is disposed between the driving element and the turntable and includes a third surface and a fourth surface, and the third surface and the second surface face each other. The balancing ring includes an outer retaining wall and at least one inner retaining wall which protrude from the fourth surface, and the first weight substance abuts between the outer retaining wall and the at least one inner retaining wall. A projection apparatus including the foregoing rotation-type optical module is further provided.

Abstract: A device includes a light source configured to generate first light, an optical element configured to reflect light incident on the optical element at a first angle of incidence and transmit light incident on the optical element at a second angle of incidence smaller than the first angle of incidence, a first reflecting unit, a second reflecting unit, and a conversion unit on which the first light is incident and which is configured to emit second light, wherein the first light is reflected by the first reflecting unit, passes through the optical element, and is then incident on the second reflecting unit, and wherein the second reflecting unit reflects the first light to the conversion unit.

Abstract: Projection systems and components thereof are described that are well suited to miniaturization.

Abstract: A light conversion device is disclosed. The light conversion device includes a substrate and a wavelength conversion element (111). The wavelength conversion element (111) includes an inorganic binder, such as sodium silicate. Also disclosed are phosphor wheels and light engines including such phosphor wheels. Further disclosed are high-power laser projection display systems comprising a laser having a power of from about 60 W and about 300 W and a light conversion device. The use of an inorganic binder permits high thermal stability at reasonable cost.

Abstract: A projector includes a first cooling target, a cooling device, and an exterior housing that houses the first cooling target and the cooling device. The cooling device includes a first compressor configured to compress working fluid, a condenser configured to condense the working fluid, a first expander configured to decompress the working fluid, a first evaporator configured to change the working fluid to the working fluid in the gas phase with heat transferred from the first cooling target, a first connection pipe configured to lead the working fluid discharged from the first expander to the first evaporator, a second connection pipe configured to lead the working fluid discharged from the first evaporator to the first compressor, and a first case configured to seal the first expander, the first connection pipe, the first evaporator, and the second connection pipe on an inside.

Abstract: A projection system and method for depth-based projection of image-based content is provided. The projection system receives a sequence of image frames to be projected on a physical surface of a three-dimensional (3D) structure. The projection system controls a depth sensor to acquire depth data associated with the physical surface and feeds a first input including the acquired depth data and a first image frame of the received sequence of image frames to a neural network-based model. The projection system further receives a set of geometric correction values as a first output of the neural network-based model for the fed first input and modifies the first image frame based on the received set of geometric correction values. The projection system further controls the illumination circuitry to project the modified first image frame onto the physical surface.

Abstract: A stereoscopic image display apparatus that is capable of being efficiently aligned using a remotely controlled alignment function and a method of displaying a stereoscopic image using the same are disclosed.

Abstract: The projection device includes a projector housing, wherein a light source mechanism is provided on a right side of an internal bottom end of the projector housing, a lens set is arranged on a right side of the projector housing, two guide slots are vertically arranged on an inner wall on a left side of the projector housing, a lifting support is arranged on the two guide slots, the lifting support is fitted to the two guide slots via a lifting device, a first reflector is obliquely arranged on the lifting support, a second reflector is fixedly and obliquely arranged under the lifting support, and a direction of an inclination of the second reflector is opposite to a direction of an inclination of the first reflector.

Abstract: An illuminator includes a light emitting apparatus which outputs first light belonging to a first wavelength band, a wavelength converter which converts part of the first light into second light belonging to a second wavelength band and causes the second and remainder of the first light to exit, a first optical system with positive power and which the first light enters, an optical element which the remaining first light enters and which reflects either the first or second light and transmits the other, a second optical system with positive power and which the first from the optical element and second light from the converter enter, a third optical system with positive power and causes the first light from the second optical system to enter the converter, and a fourth optical system with positive power and which the second light from the second optical system enters.

Abstract: One container system includes a transparent display, a projector for providing image data on the display, and a floor defining part of a watertight cavity. The display is non-perpendicularly angled from horizontal and has proximal and distal ends. And a closure device is provided for use with a watertight container. The closure device is configured to selectively seal an opening in the watertight container and includes coupling structure (a plug, a flange, and/or threading) for selectively coupling the closure device to the watertight container to seal the opening. The closure device further includes non-transitory computer memory, at least one sensor, and a processor in data communication with the memory and the at least one sensor.

Abstract: A wavelength conversion element includes a substrate, an adhesion layer and a wavelength conversion material. The substrate has a bearing surface having an adhesion zone. The adhesion zone has a central portion and two edge portions respectively on two sides of the central portion. The adhesion layer is disposed on the adhesion zone and includes a first adhesive and a second adhesive. The first adhesive is disposed at the edge portions. The second adhesive is disposed at the central portion. Operating temperature of the first adhesive is lower than operating temperature of the second adhesive. Viscosity of the first adhesive is larger than viscosity of the second adhesive. The wavelength conversion material is fixed on the bearing surface by the first adhesive and the second adhesive. A projection apparatus having the wavelength conversion element is provided, and the durability of the wavelength conversion element and the projection apparatus is improved.

Abstract: A polarizing beam splitter assembly for directing image light on an input path into multiple exit light paths comprises multiple prisms with edges that meet to form a seam. The polarizing beam splitter assembly includes a diffracting element prior to the seam in the input light path. The diffracting element comprises a geometry that performs at least one of blocking a portion of the image light and scattering a portion of the image light.

Abstract: An illumination system, including a light source, a reflective optical element, a polarization conversion element, a beam splitting element, and a homogenizing element, is provided. The light source provides a first light beam having a first polarization state and a second light beam having a second polarization state. The reflective optical element is disposed on a transmission path of the first light beam and the second light beam. The polarization conversion element is disposed between the light source and the reflective optical element. The beam splitting element is disposed between the light source and the polarization conversion element. The beam splitting element includes at least one first region and at least one second region. The homogenizing element is disposed on a transmission path of a light beam reflected by the beam splitting element. A projection device having the illumination system is also provided.