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3736 results about "Projection screen" patented technology

A projection screen is an installation consisting of a surface and a support structure used for displaying a projected image for the view of an audience. Projection screens may be permanently installed, as in a movie theater; painted on the wall; or portable with tripod or floor rising models. as in a conference room or other non-dedicated viewing space. Another popular type of portable screens are inflatable screens for outdoor movie screening (open air cinema).

Apparent speckle reduction apparatus and method for MEMS laser projection system

A laser projection system is disclosed having reduced apparent speckle. The system includes a laser emitting a first beam on an optical element. The optical element emits a second beam incident on a scanner that scans the beam onto a projection screen. The optical element may be an exit pupil expander, delay plate, or have a locally electrically modulated index of refraction. In other embodiments, the laser has a tunable wavelength distribution that is changed for each frame displayed by the projection system to reduce apparent speckle. In still other embodiments, the angular content of a beam incident on a scanner is modulated to produce a time varying speckle pattern.
Owner:MICROVISION

Rotating cylinder multi-program and auto-stereoscopic 3D display and camera

The invention described herein represents a significant improvement for the users of displays. In a first reflective immersive embodiment, a rotating encompassing projection screen with integral horizontal and vertical reflective lenticulars completely surrounds users to enable multiple users to concurrently watch completely different programs including auto-stereoscopic 3D programs in an immersive venue format which is highly reliable and cheap to produce. In a second transmissive immersive embodiment, a rotating encompassing projection screen with integral horizontal and vertical transmissive lenticulars completely surrounds users to enable multiple users to concurrently watch completely different programs including auto-stereoscopic 3D programs in an immersive venue format which is highly reliable and cheap to produce. In a third embodiment, a rotating projection screen with integral horizontal and vertical reflective lenticulars enables multiple users to concurrently watch completely different programs including auto-stereoscopic 3D programs in a front projection format which is highly reliable and cheap to produce. In a fourth embodiment, a rotating projection screen with integral horizontal and vertical transmissive lenticulars enables multiple users to concurrently watch completely different programs including auto-stereoscopic 3D programs in a rear projection format which is highly reliable and cheap to produce. Also in recording embodiments, a camera replaces the projector in each respective embodiment to enable recording of auto-stereoscopic 3D scenes.
Owner:ALDEN RAY M

Multi-mode optical pointer for interactive display system

Control of a presentation computer is accomplished by a wireless optical pointer that projects an encoded control cursor onto a projection screen in an interactive presentation system. The optical pointer is selectively operable in a position-dependent, control cursor spot projection mode by actuation of a first push button switch that enables remote initiation of various computer keyboard commands and/or pointing device (mouse, touch pad, track ball) position-dependent cursor operations, e.g., select, move, left click, right click and double click. Operation of the pointer in a presentation function selection mode is initiated by actuation of a second push button switch in which a predetermined spatial image pattern can be projected onto the screen by gesturing, thereby enabling remote annotating or highlighting an object on the display screen. Optionally, operation of the pointer in the presentation function selection mode can be initiated by stylus actuation of a control switch which allows the presenter, while standing in close proximity or within reach of a presentation screen, to underline a word, highlight an object, circle an object, strike out a word or object, insert a note next to a word or object, or annotate an object or word with a check mark. These actions are performed by manually drawing a stylus across the area of the presentation screen that is to be annotated, marked or highlighted.
Owner:KEYTEC

Transparent projection screen

The invention discloses a transparent projection screen. The transparent projection screen comprises base material layers, wherein focusing structures and diffusing structures are distributed on the lower surface of the first base material layer and combined with the first base material layer, light rays from a projection system are focused on the position where an observer is located through the focusing structures and are diffused into an observation area on the position where the observer is located by the diffusing structures, the focusing structures and the diffusing structures are plated with a partial reflection film structure, a reflective index matching layer is combined with the surface of the partial reflection film structure and covers the surface of the partial reflection film structure, the reflective index of the reflective index matching layer is identical with the reflective index of materials of the focusing structures and the diffusing structures, and the second base material layer is combined with the surface of the reflective index matching layer and covers the surface of the reflective index matching layer. By the adoption of the projection screen, the observer can see a high-brightness projection image and an object behind the screen clearly at the same time, the transparent effect is good, and the energy utilization rate is high.
Owner:SUZHOU UNIV

System and method for correcting multiple axis displacement distortion

A system and method for correcting distortion in projected images caused by the projection of an input image by a projector lens onto a projection screen having a surface that is not orthogonal to the projection axis of the projector. Projection parameters including the focal length of the projector lens and the angles that represent the pan, tilt and roll angle of the projector are obtained. Then the projected area and the best viewable rectangular area that fits within said projected area is determined. The distortion is then characterized by using a distortion transformation which corresponds to the transformation that exists between the vertices of the best viewable rectangular area and the corresponding vertices of the projected area. Finally, the distortion transformation is inverted and applied to input image to obtain a distortion free projected image.
Owner:GEO SEMICONDUCTOR INC

High performance rear-projection screen

A rear-projection screen and a method for forming same are provided. The screen can include a substrate including a first side and a second side, apertures disposed on the first side of the substrate, and an opaque layer disposed on the second side of the substrate. In a particular embodiment, the opaque layer includes a plurality of apertures therethrough. A surface relief diffuser can be provided in the substrate at the plurality of apertures. A bulk diffuser can be provided at the plurality of apertures to diffuse the projected image. A cover can be attached to the opaque layer, for example, with an adhesive. An overlayer can be provided on the opaque layer for providing deep apertures that can be filled with bulk diffuser to further diffuse the projected image. The overlayer disposed on the opaque layer can include a light-absorbing material in and / or on the overlayer.
Owner:REFLEXITE

Sheet for use for projection screen, light diffusion sheet and projection screen

Provided is a light diffusion sheet or film capable of preventing the reflection of an external light that has entered from a light emission surface and also capable of obtaining a high gain. Also provided is a projection screen using the light diffusion sheet or film. The light diffusion sheet or film has formed thereon, either one-dimensionally or two-dimensionally, a plurality of unit lenses. The unit lens is substantially trapezoidal in cross section. The lower bottom of the trapezoid is made to be a light incidence portion and the upper bottom thereof is made to be a light emission portion. The unit lens is formed using a material having a prescribed refractive index N1. One portion, the cross section of which is triangular and located between an adjacent two of the unit lenses, is formed using a material having a refractive index N2 lower than refractive index N1 and having added thereto light absorption particles. When it is assumed that T represents the length of the upper bottom of the trapezoid; H represents the height of the upper bottom thereof; and theta represents the angle defined by the slant of the trapezoid with respect to a line normal to the light emission portion, the following relationships apply:and the surface of the light incidence portion has performed thereon embossing processing.
Owner:DAI NIPPON PRINTING CO LTD

Projection screen display method and electronic equipment

The embodiment of the invention provides a projection screen display method and electronic equipment, relates to the technical field of terminals, and aims at enabling target equipment to arrange display content sent by source equipment according to equipment characteristics of the target equipment so as to improve the display effect of projection screen display among multiple pieces of equipmentand the user experience. The method comprises the steps that first electronic equipment displays a first display interface; the first electronic equipment receives a screen projection instruction thata user projects the first display interface to second electronic equipment; in response to the screen projection instruction, the first electronic equipment determines one or more first target controls in the first display interface; and the first electronic equipment sends a first message to the second electronic equipment, the first message comprises a drawing instruction of the first target control, so that the second electronic equipment draws a first screen projection interface according to the drawing instruction of the first target control, and the first screen projection interface comprises the first target control.
Owner:HUAWEI TECH CO LTD

Visual input pointing device for interactive display system

An interactive presentation system uses a presentation computer, a computer-controlled image projector and a projection screen, in which control of the presentation computer is accomplished by using a wireless optical pointer that projects an encoded control cursor onto the projection screen. The projected screen images are monitored by a video camera, and the control cursor is scanned, detected and decoded for emulating various keyboard commands and/or pointing device (mouse, touch pad, track ball) position-dependent cursor operations. The control cursor is reliably detected and its coordinate location is accurately determined on the basis of one or more primary image attributes, for example image intensity and image repetition rate, both of which are independent of monitoring angles and pointing device projection angles, and one or more secondary image attributes, for example image size, color and pattern. Neither of the primary attributes can be masked or obscured by the presence of background screen images or objects. Although the secondary attributes of the control cursor may be identical with the attributes of background images, reliable decoding of a computer command is assured since analysis and decoding of the secondary attributes are conditionally performed only after the control cursor image has been detected and captured (stored in memory for determination of coordinate location) on the basis of one or more of the independent attributes.
Owner:KEYTEC

Remote interactive pen and handwriting detection method

InactiveCN101872260ARealize the space writing functionGet rid of the defect of poor portability and inconvenient useInput/output processes for data processingHandwritingSonification
The invention discloses a remote interactive pen and a handwriting detection method. The remote interactive pen comprises a handheld end and a receiving end. The handheld end detects a writing motion characteristic quantity of a penholder by adopting a three-axis gyroscope and two three-axis accelerometers and measures the relative motion distance between the penholder and a screen or the ground by adopting ultrasonic distance measurement; and the measurement information is subjected to data fusion according to a human writing motion model, solution of the writing motion characteristic quantity and identification of writing intention so as to realize handwriting detection. The receiving end is used for receiving writing control information solved by the handheld end, handwriting information and three-dimensional motion information of a cursor. Through the application of tracking and positioning arm motion characteristics to control cursor motion, operate a window and realize distance writing function, increasing the motion detection function vertical to the projection screen direction, serving as a three-dimensional air mouse for virtual reality and the like, the remote interactive pen overcomes the defect that the conventional input equipment cannot reflect the three-dimensional motion information of the cursor, and has the characteristics of simple structure and convenient use.
Owner:张通达 +1

Sheet for use for projection screen, light diffusion sheet and projection screen

Provided is a light diffusion sheet capable of preventing the reflection of an external light that has entered from the light emission surface and of obtaining a high gain, and a projection screen using the light diffusion sheet. In the light diffusion sheet or film, the light diffusion sheet or film having formed thereon a plurality of unit lenses one-dimensionally or two-dimensionally, the unit lens is substantially trapezoidal in cross section; the lower bottom of the trapezoid is made to be a light incidence portion and the upper bottom thereof is made to be a light emission portion; and the unit lens is formed using a material having a prescribed refractive index of N1; a portion, the cross section of that is triangular, and that is located between adjacent two of the unit lenses, is formed using a material having a refractive index N2 lower than the N1 and having added thereto light absorption particles; and when it is assumed that T represents the length of the upper bottom of the trapezoid; H represents the height of the upper bottom thereof; and theta represents the angle defined by the slant of the trapezoid with respect to a normal line to the light emission portion, the relationship holds true that is expressed as: <paragraph lvl="0"><in-line-formula>sin (90°-theta)>N2/N1 </in-line-formula><paragraph lvl="0"><in-line-formula>N1<1/sin 2theta</in-line-formula><paragraph lvl="0"><in-line-formula>0<H<T/(tan (2theta+10°)-tantheta) </in-line-formula>and the surface of the light incidence portion has performed thereon embossing processing.
Owner:DAI NIPPON PRINTING CO LTD

Movement-information processing system, terminal unit for use in the system, and battery recharging unit for use with the terminal unit

Disclosed is a movement-information processing system, which comprises a control unit 30 including an image display control section 312 adapted to allow a guide image for instructing a plurality of players to perform a physical training consisting of plural types of body movements to be displayed on a projection screen 20, and a plurality of terminal units each formed in a belt-like configuration and provided with a movement detection device 53 operable, when the terminal unit is worn on a body of either one of the players, to detect body movements of the player. Each of the terminal unit includes a communication processing section 533 for transmitting a detection signal representing the body movements detected by the movement detection device 53 to the control unit 30. The control unit 30 includes a communication processing section 313 for receiving the detection signal from the communication section 533 of the terminal unit 50, a calorie consumption calculation section 322 for evaluating an exercise quality of the player wearing the terminal unit 50, based on the received detection signal and a content of the guide image, and an image display control section 312 for announcing the evaluation result of the exercise quality through an announcement section.
Owner:KONAMI SPORTS & LIFE
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