39 results about "Projector" patented technology

This invention relates to optical systems for holographic projectors. We describe a holographic image projection system, the system including: a spatial light modulator (SLM) for displaying a hologram; first optics to provide an input beam to said SLM; second optics to process an output beam from said SLM to provide a displayed image; and a hologram processor to receive image data for display and to output data to said SLM to display a hologram to provide said displayed image; and wherein at least one lens of said first optics or said second optics is encoded in said hologram.

The invention relates to a three-dimensional pavement crack image generation system and method. The system includes an information acquisition subsystem, a data processing subsystem and the like, wherein the information acquisition subsystem includes an image acquisition module and a crack depth acquisition module; the image acquisition module includes a shooting control sub-module, a CCD line scan camera and a structured light projector; and the data processing subsystem includes an information storage module, an image registration module, a visible light image crack detection module, a structured light image space texture extraction module and an image fusion module. The method comprises the following steps: step S100, collecting sample crack information, and building a crack depth prediction model; step S200, collecting a target rack image, extracting crack features and space texture, and calculating the target crack depth. Compared with the prior art, the three-dimensional pavement crack image generation system and method provided by the invention are simpler and more feasible and high in accuracy, and have broad application prospects.

Embodiments are directed towards a system for enabling a user to view an image on a surface. The system may include projector(s), sensor, projection surface or screen, and processor. The projectors may project light for an image onto the surface. The sensor may detect light reflected off the surface. The surface may include multiple types of surface elements, such as multiple first elements positioned as border of a display area on the surface to provide feedback regarding the surface and multiple second elements positioned within the border of the display area to reflect the image to the user. The processor may determine characteristics of the border of the display area based on light reflected to the sensor from first elements. And it may modify parameters of the image based on the characteristics of the border of the display area.

The invention discloses a light source system and a projector. The light source system comprises a wavelength conversion apparatus, a filtering apparatus and a dodging apparatus. The wavelength conversion apparatus comprises at least two fluorescent areas, wherein different fluorescent areas are provided with different wavelength conversion materials which generate exited light with different wavelength coverage areas; the filtering apparatus is provided with N light processing diaphragms which are successively arranged in the emergent light path of the excited light, wherein a one-to-one correspondence is formed between the light processing diaphragms and the fluorescent areas in the wavelength conversion apparatus; each light processing diaphragm reflects the excited light generated by the fluorescent area in the wavelength conversion apparatus corresponding to the light processing diaphragm to the dodging apparatus, wherein a minimum N is the number of the fluorescent areas of the wavelength conversion apparatus; the light processing diaphragms are curved surface diaphragms. According to the invention, the problem of greater space occupation caused by the loosened structure of a light source system of the prior art is solved.

The invention relates to a luminous device, a cooling method thereof and a projector, wherein the luminous device comprises a light source, a detection unit, a cooling unit and a control unit, wherein the detection unit is connected to the light source and used for detecting current value and voltage value of the light source; the cooling unit is arranged close to the light source and used for cooling the light source; and the control unit is arranged between the detection unit and the cooling unit, and adjusts the cooling unit according to the current value and the voltage value. The invention can effectively reduce the response time and noise of the cooling unit, and avoid the damage to light sources with high heat value in the luminous device.

A 3-D reconstruction method based on Taylor exponent expression surface structured light is provided, The method mainly comprises the following steps: generating and projecting a surface structure grating based on a special exponential expression, acquiring an image, and calculating the phase information of a projector-free gamma error contained in the acquired image based on a corresponding novelphase decomposition method. Thus, through the phase information of no projector gamma error, calculating the three-dimensional measurement result, and eliminating the effect of projector gamma on themeasurement result, and improving the measurement precision.

The invention discloses a method for GPU-based (Graphics Processing Unit) object three-dimensional shape measurement, and belongs to the technical field of object three-dimensional measurement. The method particularly comprises the following steps: projecting structure grating to the surface of an object to be measured by a projector; shooting the surface of the object to be measured by two cameras simultaneously to obtain two groups of image sequences; storing the two groups of image sequences into computer memory; completing distortion correction, phase demodulation, corresponding points matching and three-dimensional reconstruction for the image by a GPU in parallel; transmitting the object three-dimensional coordinate obtained through three-dimensional reconstruction to the computer memory by the GPU; repeating the above steps until the measurement is complete, and releasing the GPU and the storing space. The method adopts multi-core GPU to realize the parallel calculation at thread level, greatly increases data processing speed, and can satisfy the real-time requirement for three-dimensional measurement of a dynamic object.

The embodiment of the invention discloses a screen projection pairing method and device, a storage medium and a screen projector, and the method comprises the steps: obtaining a historical pairing information set when a screen projection instruction inputted for the screen projector is received; acquiring the priority of each piece of historical pairing information in the historical pairing information set, and determining target historical pairing information in the historical pairing information set based on the high-low sequence of the priorities; and performing screen projection pairing with screen projection receiving equipment based on the target historical pairing information. Therefore, by adopting the embodiment of the invention, the operation is simple and quick, the intelligenceand convenience of screen projection pairing between the screen projector and the screen projection receiving equipment can be improved, and the user experience is improved.

An illumination apparatus provided with a light source 4, a polarization splitter 6 disposed facing the light source at about 45 degrees with respect to its light emission direction, a first reflector 8 reflecting and condensing one of the polarization light components polarized and split by the polarization splitter, a quarter wave plate 20 disposed between the polarization splitter and the first reflector, a second reflector 10 reflecting and condensing the other of the polarization light components polarized and split by the polarization splitter, a third reflector 12 disposed around the light source and reflecting the other polarization light reflected by the second reflector and the polarization splitter and proceeding in the light source direction, and a quarter wave plate 22 disposed between the polarization splitter and the third reflector and around the light source, the light reflected at the first reflector and reflected at the polarization splitter being used to illuminate a predetermined surface 16.

The invention discloses a projection table. The projection table comprises a base (1), a support (2) and a worktable plate (3). The support (2) is a telescopic support and comprises a lower upright, an upper upright and a locking device (4). One end of the upper upright is fixedly connected to the center of the bottom face of the worktable plate (3), the other end of the upper upright is arranged inside the lower upright in a sleeved mode, and the upper upright and the lower upright are fixed through a locking device (4). The lower upright is fixedly connected with the base (1) and at least three universal wheels (5) are arranged at the bottom of the base (1). The projection table has the advantages that the height of the projection table is adjustable, the height of a projector can be adjusted according to needs, use is convenient, and due to the fact that the universal wheels are arranged at the bottom of the base, moving is convenient.

In at least one embodiment of the disclosure, a discharge lamp lighting device includes a discharge lamp driving unit that drives a discharge lamp (90) by supplying an AC driving current (I) to the discharge lamp (90). A memory unit (44) is configured to store driving parameters for the AC driving current (I). A control unit (40) is configured to control the discharge lamp driving unit based on the driving parameters stored in the memory unit (44). The driving parameters comprise a range of holding time values, each holding time value representing a time period in which the AC driving currentis to be continuously maintained at a same polarity. Upon a predetermined time condition, the control unit (40) selects one of the holding time values based on a predetermined probability and controls the discharge lamp driving unit based on the selected holding time value.

The invention discloses a connecting seat structure, and aims at providing a connecting seat structure with the advantages of rapid angle and direction adjustment, simple and effective positioning, strong leveling ability and adaption to multi-angle micro-adjustment. The connecting seat structure comprises a mounting seat, a tripod joint seat and a line projector joint seat, the mounting seat is provided with a main inner cavity and a seat top hole, the tripod joint seat comprises a universal bulb, an abduction ring neck and a lower joint, the abduction ring neck is positioned in a ring neck matching slot, the mounting seat is provided with a fastening screw, the line projector joint seat comprises a bulb matching base adapting to the universal bulb and an upper joint used for connecting with a line projector, the upper joint traverses through the seat top hole and stretches out of the top of the mounting seat, a compacting cushion block is arranged in the main inner cavity, and the mounting seat is provided with a locking handle. The connecting seat structure can realize simple and fast adjustment of the angle or direction, and also can realize leveling through rotating the bulb matching base when a support cannot be leveled, so the connecting seat structure has good adjusting ability and angle adaptability.

Enterprise communication display systems enable life-like images for videoconferencing and entertainment productions. Life-like images appear in a 3D environment where imaged people are visible through specially configured see-through displays. Imaged people can be viewed amongst a reflected foreground. Methods for enterprise-wide deployments for corporate, healthcare, education, theater which includes cinema and government communications, including hotel properties and a property management system are shown. Direct projection see-through screen configurations are created that eliminate unwanted secondary images in the room, conceal exposed projector lenses, reduce lens flare, makes practical multi-use room installations, images conferees among a room environment, enables touch screen interactivity, and utilizes extreme and other types of short throw projectors to reduce cost and bulk of common throw projectors. Of these transparent screens inventive configurations of substantially invisible mesh screens for both front and rear projection are described. Further, transparent LCDs are inventively configured to enable imaged life-size persons for videoconferencing in numerous configurations including with the light source removed from the LCD and placed away from the imaged persons. Further, display and camera configurations are revealed that improves the videoconferencing experience.

The invention relates to a detection system for a display screen of a liquid crystal panel, which comprises a high-voltage strip, a button box, a process control system and a low-voltage differential signaling (LVDS) signal generating circuit, wherein the high-voltage provides voltage to illumine the display screen of the liquid crystal panel; the LVDS signal generating circuit generates LVDS signals to detect parameters of the display screen of the liquid crystal panel; different processes are selected by the button box, so that the LVDS signal generating circuit generates the LVDS signals in different modes; and the LVDS signals in different modes can detect different parameters of the display screen of the liquid crystal panel. The detection system has the advantages that: for a display and a projector which have large sizes, an optical probe for analyzing colors can perform multipoint simultaneous measurement, and after the optical probe is matched with a video signal figure generator for analyzing an image signal and a software operating interface, the measurement of all programming projects can be completed by quick one-button operation, so the detection system has high compatibility and stable performance; and the system has a small volume, is convenient to carry, and can be widely applied to the solution of video and color tests.

A sterilization and cleaning system of an escalator including a first body, a counting wheel, a controller, a second body and a cloud sever is provided. The first body includes a first tank and a first atomizer connected to the first tank. The first atomizer is adapted to atomize a first sterilization and cleaning liquid and spray the atomized first sterilization and cleaning liquid to a handrail of an escalator. The counting wheel is pivoted to the first body. The controller is electrically coupled to the first atomizer. The second body is disposed side by side with the first body, wherein the second body includes a projector, a sensor and a wireless transmission module. The projector and the sensor are electrically coupled to the controller. The wireless transmission module is electrically coupled to the controller and the sensor. The cloud sever is adapted to communicate with the wireless transmission module.

A light amount control device that controls an amount of light acquired from a light source provided in an image display apparatus includes: a pulse generator; an operation processing portion for light amount control that outputs a transfer start signal at timing when the amount of light is controlled; a data setting circuit that is provided outside the operation processing portion and that stores data, in which various kinds of signals instructing the operation processing portion to set transfer data beforehand are set, in a memory; an address generator that is provided outside the operation processing portion and that sets an address in response to the transfer start signal output from the operation processing portion; a memory that is a main component included in the pulse generator and that outputs data on the basis of a memory address generated by the address generator; a pulse driven body whose operation direction and speed are determined by a pulse signal formed by data output from the memory and which is driven by a pulse; an actuator connected to the pulse driven body; and an opening capable of adjusting the amount of transmitted light according to an operation of the actuator inserted in an emission path of the light source.

A projection apparatus including an image source, an imaging module and a beam splitting module is provided. The image source provides an image beam. The imaging module is disposed on a transmission path of the image beam and has an aperture stop. The beam splitting module is disposed on the transmission path of the image beam and located on or near the aperture stop. The beam splitting module includes a plurality of aperture stop sub-regions, and the beam splitting module separates a plurality of image sub-beams of the image beam irradiating these different aperture stop sub-regions. These image sub-beams respectively propagate towards different directions after travelling to these aperture stop sub-regions.

A light leakage preventive structure for front projector includes an octagonal mask fixedly disposed before a lens of the projector, so that a projected image sequentially passes the lens and the mask to effectively prevent light leakage around a screen showing the projected image.

The wall advertisement projecting device solves the issues of fixed format, small size, high cost in updating, using remote wireless control switch and shared hardware DLP light processing digital camera, increasing the sound effect in advertisement release, realizing updated convenience, less consumption and making cost, with animated effect, enlarged capacity, advertisement releasing effect, applicable for wall or outdoor advertisement.

The invention discloses a virtual stage figure magic showing system. The virtual stage figure magic showing system comprises a left transparent holographic projection film and a right transparent holographic projection film which are put up on a stage at an interval, and the distance between the left transparent holographic projection film and the right transparent holographic projection film is 1m-3m. A computer mainframe is disposed in an audio-video control chamber beside the stage, and the computer mainframe is connected with a computer display and a sound box device. The front of the stage is provided with a left projector used for projecting single-person or multi-person dance movement videos played by the computer mainframe on the left transparent holographic projection film, and a right projector used for projecting the single-person or multi-person dance movement videos played by the computer mainframe on the right transparent holographic projection film. The left projector and the right projector are both connected with the computer mainframe. The virtual stage figure magic showing system is simple in structure, simple to use and operate, small in rehearsal energy consumption, small in manpower and material resource consumption, high in practicality and wide in application range, magic effects of a performance are increased, and watching requirements of people are satisfied.