Abstract: A laser device includes a shell, an upper cover assembly, a plurality of light-emitting assemblies, and a plurality of conductive pins. The shell includes a base plate, a frame body, and a first flange. The first flange is bent relative to the frame body and is fixedly connected to the base plate. The upper cover assembly is fixed to the shell. The plurality of light-emitting assemblies are disposed on the base plate. Any one of the plurality of conductive pins is electrically connected to a light-emitting assembly. The frame body includes a plurality of flanging holes. A depth of any one of the plurality of flanging holes is greater than a thickness of the frame body. A portion of the any one of the plurality of conductive pins is located at an outside of the accommodating space through a corresponding flanging hole.

Abstract: A laser projection apparatus includes a laser source, a light modulating device, a projection lens, and a circuit system. The circuit system is configured to control the laser source to emit laser beams of at least N primary colors. N is an integer greater than or equal to 3. The circuit system structure includes a display control circuit and a laser source driving circuit. The display control circuit is configured to output N PWM signals and three enable signals. The laser source driving circuit is electrically connected to the display control circuit, and is configured to receive N PWM signals and three enable signals, so as to drive laser chips of corresponding colors to emit laser beams of the at least N colors.

Abstract: A laser source assembly and a projection apparatus are provided. The laser source assembly includes a laser device, a combining lens group, and a polarization direction adjustment component. The laser device is configured to emit laser beams of a plurality of colors. The combining lens group is configured to combine the laser beams of the plurality of colors and propagate the combined laser beams in a first direction. The polarization direction adjustment component is configured to adjust a polarization direction of at least a portion of the laser beams of the plurality of colors to obtain a target laser beam. A laser beam of at least one color in the target laser beam satisfies that the polarization direction of a portion of the laser beam of a same color is different from the polarization direction of another portion of the laser beam of a same color.

Abstract: A laser projection apparatus includes a main control circuit, a diffusion wheel driving circuit and a temperature sensor. The temperature sensor is electrically connected to the main control circuit, and configured to detect an ambient temperature. The main control circuit is configured to: determine a target starting current according to the ambient temperature; determine a duty cycle of a second startup pulse width modulation signal according to the target starting current, and provide the second startup pulse width modulation signal to the diffusion wheel driving circuit; and output an operating pulse width modulation signal to the diffusion wheel driving circuit when the diffusion wheel reaches a target rotation speed. The target starting current is a minimum drive current required to drive the motor from standstill to starting to rotate. The target rotation speed is a preset speed at which the diffusion wheel operates normally and speckles are eliminated.

Abstract: A laser projection apparatus includes a laser source assembly, a light modulation assembly, and a projection lens. The laser source assembly includes a laser device, and the laser device includes a base plate, at least one frame, and a plurality of light-emitting chips. At least one accommodating space is defined between the at least one frame and the base plate. A region of the base plate located in the at least one accommodating space includes a first region and a second region. The second region is located on at least one side of the first region. An operating parameter of each light-emitting chip in the first region is less than an operating parameter of each light-emitting chip in the second region, and the operating parameter includes at least one of a photothermal conversion efficiency or a wavelength of the emitted laser beam.

Abstract: A laser projection apparatus includes a laser source assembly, a light modulation assembly, and a projection lens. The laser source assembly includes a laser device. The laser device includes a base plate, a frame, a first light-emitting chip, a first reflecting portion, a first collimating portion, and a light homogenizing component. The first light-emitting chip is configured to emit a first laser beam. The first collimating portion is located in a sealed space and configured to collimate the first laser beam, so as to transmit the first laser beam to the light homogenizing component in a direction perpendicular to the base plate. The light homogenizing component is disposed on a side of the frame away from the base plate and configured to homogenize the first laser beam and propagate the first laser beam out of the sealed space.

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 display control circuit, a laser source, a laser source driving circuit, and a light modulation device. The display control circuit includes an algorithm processor and a control processor. The algorithm processor is configured to: determine a gain value ? of each frame of image according to a gray scale value of each frame of image, and transmit N current control signals, M enable signals, and image display data to the control processor. The control processor is configured to: transmit the N current control signals and the M enable signals to the laser source driving circuit; and transmit the image display data to the light modulation device. The light modulation device is configured to modulate beams emitted by the laser source according to the image display data to generate image beams.

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 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 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 source includes a light-emitting assembly, a phosphor wheel, a converging lens group, and a combining component. The combining component is disposed between the light-emitting assembly and the converging lens group. The combining component has a plurality of light reflecting regions and a plurality of laser transmitting regions, and the plurality of light reflecting regions and the plurality of laser transmitting regions are alternately arranged. The plurality of laser transmitting regions are configured to transmit the laser beam emitted by the light-emitting assembly, and the plurality of light reflecting regions are configured to reflect a laser beam reflected by the laser-reflecting region of the phosphor wheel and a fluorescent beam excited by the fluorescence-exciting region of the phosphor wheel toward a beam outlet of the laser source.

Abstract: A projection screen and a projection system are provided. The projection screen includes a surface layer, at least one substrate layer, a Fresnel lens layer, a reflective layer, and a plurality of light-transmitting protrusions. The surface layer, the substrate layer, the Fresnel lens layer, and the reflective layer are sequentially arranged in a stack manner. The plurality of light-transmitting protrusions are disposed on a surface of the surface layer away from the Fresnel lens layer. At least one light-transmitting protrusion of the plurality of light-transmitting protrusions includes: a body portion and at least one of a gradually narrowing portion or a gradually expanding portion. The gradually narrowing portion or the gradually expanding portion is disposed on a surface of the body portion away from the Fresnel lens layer.

Abstract: A projection apparatus includes a housing, a laser source, a projection lens, and a light modulation assembly. The housing includes a first opening and a second opening, a laser-exit side of the laser source faces towards the first opening, and a laser inlet side of the projection lens faces towards the second opening. The light modulation assembly includes a lens group, a prism group, a digital micromirror device, and a light-transmitting optical element. A second laser-exit side of the prism group faces towards the second opening, and an orthogonal projection of the laser inlet side of the projection lens on the prism group is within a region where the second laser-exit side of the prism group is located. The light-transmitting optical element is disposed in the housing and is located between the digital micromirror device and the prism group.

Abstract: A laser source includes a light-emitting assembly, a converging lens group, a phosphor wheel and a combining component. The light-emitting assembly is configured to emit a laser beam. The converging lens group is configured to converge the laser beam emitted by the light-emitting assembly. The phosphor wheel includes a fluorescence-exciting region and a laser-reflecting region. The fluorescence-exciting region is configured to generate a fluorescence beam with a color different from the converged laser beam under an excitation of the laser beam. The laser-reflecting region is configured to reflect the converged laser beam to the converging lens group. The combining component is disposed between the light-emitting assembly and the converging lens group. The combining component is configured to reflect the fluorescence beam excited by the phosphor wheel and the laser beam reflected by the phosphor wheel to a beam outlet of the laser source.

Abstract: A laser projection apparatus includes a housing, a detecting device, a projection screen, and a control assembly. The control assembly is configured to: determine a target position of a target object according to a detecting signal received by the detecting device at a first moment; if determining that the target position of the target object is within at least one threshold range, superimpose a second image on a first image on the projection screen, control the second image to show that the first image is adjusted after a target duration, and adjust at least one of the image content or the audio content corresponding to the projected image.

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 laser source includes a laser device, a combining lens group, and a beam spot angle guiding component. The laser device includes a first laser device and a second laser device. The first laser device is configured to emit a first type laser beam and a second type laser beam. The second laser device is configured to emit the second type laser beam. The combining lens group includes a first combining lens group and a second combining lens group. The first combining lens group is configured to emit the laser beams emitted by the first laser device in a first direction. The second combining lens group is configured to reflect the laser beam. The beam spot angle guiding component is configured to change a divergence angle of at least one of the first type laser beam or the second type laser beam.

Abstract: The laser source includes a light-emitting assembly, a phosphor wheel, a converging lens group, and a combining component. The light-emitting assembly is configured to emit at least a first laser beam and a second laser beam. The phosphor wheel includes a fluorescence-exciting region and a laser-reflecting region. The converging lens group is disposed between the light-emitting assembly and the phosphor wheel, and is configured to converge the first laser beam and the second laser beam to the phosphor wheel. The first laser beam and the second laser beam are asymmetric with respect to an optical axis of the converging lens group. The combining component is disposed between the light-emitting assembly and the converging lens group. The combining component includes a first reflecting region and a second reflecting region that are arranged at an interval.

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.