3719 results about "Projection screen" patented technology

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.

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.

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.

A front projection screen (S) has a front shading sheet (5) facing a viewing side (A), and formed of a transparent material. The front shading sheet (5) has a front surface facing the viewing side (A), provided with a plurality of horizontal, parallel, minute ridges (8) having a triangular cross section and each having an upper side surface coated with a shading layer (9). A transparent filler layer (13) of a material having a refractive index nearly equal to that of the transparent material of the front shading sheet (5) is formed on the rear surface (4) of the front shading sheet (5), transparent glass beads (12) are embedded uniformly in a plane in the rear surface of the transparent filler layer (13), the rear surface of the transparent filler layer (13) is coated with a white, reflecting adhesive layer (11), and an opaque film (10) impermeable to light is applied to the rear surface of the reflecting adhesive layer (11). Horizontal end parts of an image displayed on the front projection screen (S) do not become dark, the front projection screen (S) has a large viewing angle, does not reflect an environmental image even in a light environment, and is capable of displaying a high-definition image having a high black level and a high contrast.

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.

A three-dimensional display system provides a projection screen having a predetermined angularly-responsive reflective surface function. Three-dimensional images are respectively modulated in coordination with the predetermined angularly-responsive reflective surface function to define a programmable mirror with a programmable deflection angle.

The present invention provides a see-through transmitting-reflecting projection screen excellent in transparency, capable of sharply displaying, on its both sides, identical or different images even under bright environmental light.

A transmitting-reflecting projection screen 10 comprises a reflection-type screen 11 and a transmission-type screen 12. The reflection-type screen 11 reflects a specific polarized component of imaging light projected. The reflection-type screen 11 does not reflect a polarized component, different from the specific polarized component, of the imaging light, and this polarized component passes through the reflection-type screen 11 and the transmission-type screen 12.

An apparatus, system and method controls and interacts within an interaction volume within a height over the coordinate plane of a computer such as a computer screen, interactive whiteboard, horizontal interaction surface, video/web-conference system, document camera, rear-projection screen, digital signage surface, television screen or gaming device, to provide pointing, hovering, selecting, tapping, gesturing, scaling, drawing, writing and erasing, using one or more interacting objects, for example, fingers, hands, feet, and other objects, for example, pens, brushes, wipers and even more specialized tools. The apparatus and method be used together with, or even be integrated into, data projectors of all types and its fixtures/stands, and used together with flat screens to render display systems interactive. The apparatus has a single camera covering the interaction volume from either a very short distance or from a larger distance to determine the lateral positions and to capture the pose of the interacting object(s).

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.

A projection screen is provided that includes a display surface having a plurality of elements. Each element has an optical property that is responsive to an appropriate applied voltage. The display surface may be configured so that the optical properties of each element may be coordinated with the projected image.

The present invention advantageously provides an enhanced event-based theater going experience. In particular, one embodiment of the present invention enables pre-recorded videos of live performances, such as concerts, to be reproduced with great realism and encourages theater attendees to act or feel more as participants and less as passive viewers. The theater optionally comprises a projection screen, a projection room, seating, a dance area, an MC (master of ceremonies) station, changeable scenic designs, special effects equipment, food services and/or a bar.

An image display system includes a polarized image projection device, a polarization preserving transmissive diffusiver, and a polarizing reflector element as a non-blocking mirror (referred to as a "combiner"). The combination of a polarization preserving transmissive diffuser or rear projection screen and a polarizing reflector results in a high brightness HUD for applications including automotive, aerospace, or other applications where HUD systems are used. The system also maintains the low haze and high transmittance of the windshield that will meet the requirement of standards of windshields for motor vehicles and similar applications.

A projector and a mobile terminal are connected wirelessly in two-way communication, and thus the projector is controlled by the mobile terminal. Also, projection data is exchanged between the mobile terminal and the projector, or between a data server connected to a network and the projector using a command of the mobile terminal. Furthermore, when a plurality of mobile terminals send projection data simultaneously, a communication enabled state is established with only one mobile terminal by a predetermined procedure, or one projector's projection screen is divided in order to project a plurality of projection data simultaneously.

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.

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.

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.

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.

The invention relates to the technical field of image display, and provides a projection screen display method, a system and a storage medium. The method comprises the following steps: receiving projection screen images sent by more than one projection screen device in real time; Selecting a sub-image from the projection image; processing and displaying The sub-image on the display screen in realtime. different from the prior art, the projection screen device only needs to send a complete projection screen image, and the display device selects sub-images from the projection screen image for display, and the display device can display the sub-images after processing, so that the image projection screen display is more flexible, and the image projection screen display has better display effect and better versatility.