Abstract: A laser device includes a case, a support substrate, a plurality of laser chips and at least one prism which are located in the case. The plurality of laser chips and the at least one prism are all located on a side of the support substrate away from the case. The support substrate includes a chip mounting region where the plurality of laser chips are located, and a prism arrangement region where the at least one prism is located, the prism arrangement region being recessed toward the case relative to the chip mounting region. Each prism corresponds to one or more laser chips. Each prism is located on a light-emitting side of corresponding one or more laser chips, and each prism is configured to reflect a beam of light emitted by the corresponding one or more laser chips.

Abstract: A laser device includes a case, at least one heat sink, a plurality of laser chips, and at least one prism. The at least one heat sink, the plurality of laser chips, and the at least one prism are all located in the case. Each heat sink and each prism corresponds to one or more laser chips. The laser chip is located on a side of a corresponding heat sink away from the case, and the prism is located on a light-emitting side of one or more corresponding laser chips. The prism is configured to reflect a beam of light emitted by the one or more corresponding laser chips. The heat sink includes a heat dissipation substrate, a heat dissipation layer, an auxiliary layer, and a conductive layer that are disposed in sequence along a direction away from the case.

Abstract: A projection apparatus includes a detector, a laser source control unit and a laser source unit, and the laser source control unit is connected to the detector and the laser source unit. The detector is configured to obtain a detection signal for indicating whether there is an object to be protected in a laser projection region, and send the detection signal. The laser source control unit is also configured to: receive the detection signal, and send an adjustment signal carrying an adjusted projection parameter to the laser source unit when it is determined that there is the object to be protected in the laser projection region of the laser source unit based on the detection signal. The projection parameter indicates a light emission luminance of at least one laser in the laser source unit. The laser source unit is configured to emit a beam in response to the adjustment signal.

Abstract: A Fresnel projection screen includes: a Fresnel layer; a first micro-structure layer disposed at a light incident side of the Fresnel layer, the first micro-structure layer including a plurality of micro-structures that are configured to diffusely reflect a portion of light incident thereon and refract another portion of the light; a second micro-structure layer disposed on a surface of the first micro-structure layer, the second micro-structure layer including a plurality of second micro-structures that are configured to diffusely reflect a portion of light incident thereon and refract another portion of the light; and a reflective layer disposed on a side of the Fresnel layer away from the first micro-structure layer.

Abstract: Provided are an optical illumination system, and a projection device. In an example, the optical illumination system includes a DMD, a lens assembly and a RTIR assembly. The lens assembly adjusts a light beam. The RIM assembly includes a first plano-convex lens and a wedge prism. The first plano-convex lens includes a plane surface and a convex surface and is configured to refract the light beam adjusted by the lens assembly. The wedge prim includes a first side surface, a second side surface and a third side surface. The plane surface of the first plano-convex lens is glued with the first side surface of the wedge prism. The wedge prism is configured to receive and refract the light beam refracted by the first plano-convex lens through the first side surface, and the light beam refracted by the first side surface is transmitted through the second side surface.

Abstract: A laser projection apparatus includes a laser source, an optical engine and a projection lens. The optical engine includes a housing, a light pipe, a lens assembly, a reflector, a prism assembly, a digital micromirror device and at least one prism fixing member. The at least one prism fixing member is configured to fix the prism assembly on the housing, so that a relative position of the prism assembly to the projection lens is kept fixed.

Abstract: A laser projector includes a laser assembly, a beam combination mirror group and a phase delaying component. The laser assembly includes a red laser light emitting region, a blue laser light emitting region and a green laser light emitting region. Red laser light is polarized in a first direction, green laser light is polarized in a second direction, and blue laser light is polarized in a third direction. The beam combination mirror group combines the red laser light, the blue laser light and the green laser light. The phase delaying component is on a light emitting path of at least one of the red laser light, the blue laser light the green laser light, and changes a polarization direction of the at least one of the red laser light, the blue laser light or the green laser light before being output by the beam combination mirror group.

Abstract: A digital light processing projector includes a light machine having a shell. The shell is provided with a first positioning post and a second positioning post. A digital micromirror device is configured with a first positioning hole and a second positioning hole. The first positioning post is located in the first positioning hole. The second positioning post is located in the second positioning hole. The light machine includes a circuit board assembly, a pressing plate, and a first connection assembly for fixed connection with the shell, and fixation of the pressing plate, the circuit board assembly and the digital micromirror device on the shell.

Abstract: The present application provides a projection device. The projection device of the present application includes a lens barrel and a thermal transfer assembly disposed on an outer wall of the lens barrel; the thermal transfer assembly includes a first thermal transfer structure and a second thermal transfer structure, the first thermal transfer structure is disposed on the outer wall of the lens barrel and extends along an axial direction of the lens barrel, one end of the second thermal transfer structure is disposed at one end of the first thermal transfer structure, and the other end of the second thermal transfer structure extends away from the axial direction of the lens barrel. The application can effectively dissipate thermal when the lens assembly is working.

Abstract: An laser projection apparatus includes: a laser projection apparatus housing, a laser source system disposed in the apparatus housing, and the laser source system including a first laser outlet, an optical engine disposed in the apparatus housing, and the optical engine including a second laser inlet and a third laser outlet, and the second laser inlet being connected to the first laser outlet; a lens system disposed in the apparatus housing, and one end of the lens system extending to the third laser outlet; and at least one circuit board. The lens system and the optical engine are disposed along a first direction of the apparatus housing to divide space in the apparatus housing into a first region and a second region.

Abstract: A projection screen includes a screen board, a woven cloth, an adhesive layer, a frame, and elastic connecting members. The woven cloth is arranged on a back of the screen board, and an edge of the woven cloth is outside an edge of the screen board. The adhesive layer is connected to the screen board and the woven cloth respectively. The frame is arranged on a peripheral side of the screen board. First ends of the elastic connecting members are connected to the woven cloth, and second ends of the elastic connecting members are connected to the frame, so as to stretch the woven cloth and the screen board to a flat state by virtue of tension of the elastic connecting members.

Abstract: A Fresnel projection screen includes: a Fresnel layer; a first micro-structure layer disposed at a light incident side of the Fresnel layer, the first micro-structure layer including a plurality of micro-structures that are configured to diffusely reflect a portion of light incident thereon and refract another portion of the light; and a reflective layer disposed on a side of the Fresnel layer away from the first micro-structure layer.

Abstract: A projection apparatus includes a screen, a reel, a projection display structure and a control assembly. The projection display structure is configured to project at least one image to be displayed. Each image to be displayed includes an optical image with content. The screen is configured to display at least one optical image with content in the at least one image to be displayed. The control assembly is connected to the reel and is configured to control the reel to rotate. The reel is further connected to the screen and is configured to drive the screen to move when rotating. The control assembly is further connected to the projection display structure, and the control assembly is further configured to control the projection display structure to project the optical image with content in the image to be displayed onto an unfolded portion of the screen.

Abstract: A laser projection apparatus includes a laser source, an optical engine, a projection lens, and a circuit system architecture. The circuit system architecture is configured to control the laser source to emit laser beams of three primary colors. The circuit system structure includes: a display control circuit, a first laser chip driving circuit, a second laser chip driving circuit, and a third laser chip driving circuit. The display control circuit is configured to generate three PWM signals and three enable signals. The laser chip driving circuit is electrically connected to the display control circuit, and is configured to receive a PWM signal of a corresponding color and an enable signal of the corresponding color, so as to drive a laser chip of the corresponding color to emit laser beams of the corresponding color.

Abstract: A laser source includes a laser source housing, a laser array and a beam path assembly. The laser source housing includes an accommodating opening and a beam outlet. The laser array is disposed in the accommodating opening. The laser array is configured to emit laser beams into the laser source housing. A laser-exit surface of the laser array includes a plurality of laser-exit regions. The plurality of laser-exit regions are configured to emit laser beams of multiple colors. The beam path assembly is disposed inside the laser source housing. The beam path assembly is configured to combine the laser beams of the multiple colors emitted by the laser array, and make the combined laser beams exit toward the beam outlet.

Abstract: Provided are a screen frame and a laser projection display device. The screen frame includes a plurality of side frames that are connected end to end, where each two adjacent side frames of the plurality of side frames are connected by at least two connectors, and the at least two connectors are connected to the each two adjacent side frames by fasteners; the at least two connectors include a first connector and a second connector, and an inserting direction of a fastener on the first connector is perpendicular to a plane where the screen frame is located, and an inserting direction of a fastener on the second connector is parallel to the plane where the screen frame is located. The present disclosure can realize accurate alignment and joining relatively easily.

Abstract: A laser projection apparatus includes a laser light source, a diffusion wheel including a motor and a diffusion portion, a diffusion wheel driving circuit, a switch circuit and a main control circuit. The main control circuit is configured to sequentially output first and second startup PWM signals in response to a startup instruction. The diffusion wheel driving circuit is configured to drive the motor to drive the diffusion portion to rotate in response to the second startup PWM signal. The main control circuit is configured to obtain a rotation speed of the motor, and output an operating PWM signal and a first switch signal when the rotation speed reaching a target rotation speed is determined. The diffusion wheel driving circuit is configured to drive the motor to drive the diffusion portion to rotate in response to the operating PWM signal.

Abstract: A laser projection apparatus includes a display control circuit, a laser source, and a laser source driving circuit connected to the display control circuit and the laser source. The display control circuit is configured to generate N current control signals corresponding to each of a plurality of frames of images, and select an effective current control signal from the N current control signals. The N current control signals include current control signals that are in one-to-one correspondence with M primary colors of each frame of image, and a hybrid-color current control signal, N is an integer greater than 2, and M is a positive integer. The laser source driving circuit is configured to control the laser source to emit light according to the effective current control signal. Magnitudes of effective current control signals corresponding to at least two of the plurality of frames of images are different.

Abstract: A projector includes a shell, a light source, an optical machine, a projection lens and an auxiliary positioning device. The light source is configured to provide illumination beams. The optical engine is configured to modulate the illumination beams based on received image signals to obtain projection beams. The projection lens is configured to project the projection beams on a projection plane for imaging. The auxiliary positioning device is connected to the shell and is configured to locate a position the projector. The auxiliary positioning device includes a positioning rod which includes a first end and a second end opposite to the first end; the first end of the positioning rod is connected to the shell, and the second end of the positioning rod is configured to abut against a reference object that is at a fixed position relative to the projection plane.

Abstract: A laser projection display method includes: in an output period for a laser source to output a primary color beam, controlling the laser source to be turned off according to a set rotation switching period, the rotation switching period indicating a moment when the laser source is turned off and a moment when the laser source is turned on; in the rotation switching period, driving micro-mirrors in a digital micro-mirror device to perform rotation switching between an ON state and an OFF state until the moment when the laser source is turned on indicated by the rotation switching period is reached; and when the moment when the laser source is turned on is reached, controlling the laser source to be turned on, and driving the micro-mirrors to rotate to project and display an image to be displayed until a next rotation switching period is reached.