3734 results about "Projection screen" patented technology

A resin composition for production of an optical element being adapted to form the optical element has a characteristics of which, when W1 / 2 (° C.) represents, regarding a crest portion in a loss factor / temperature curve obtained by measuring the loss factor of the resin composition relative to a change in the temperature, the width of the crest portion at the position of ½ of the maximum value of the loss factor in the crest portion temperature range; W0.1 (° C.) represents, regarding the crest portion, the width of the crest portion at the position of 0.1 of the maximum value of the loss factor; and DeltaW (° C.), the difference between the widths of the two crest portions, is set to be DeltaW=W0.1-W1 / 2, the DeltaW is in the range of from 16° C. to 31° C.

A simulation system for training athletes in cognitive skills includes hardware incorporating imaging and tracking devices, sound generator and receiver, a projection screen, and a movie projector for creating a virtual environment that simulates the site specific to the sport. The system includes software installed on a processor that is in signal communication and in controlling relation to the hardware elements. The system inputs to the software a plurality of scenarios in which the athlete might find him / herself. The software acts to retrieve a scenario and output a plurality of control signals for presenting a visual and aural simulation. A body parameter is tracked in temporal coordination with elements of the scenario. The tracked parameter is saved for later review by the user and, in some cases, training personnel. The scenario evolves in response to the tracked parameter, and is thus interactive in nature.

A rear projection screen (20) and a rear projection video system using the screen are disclosed. A rear face (20a) of the screen (20) has a structured surface comprising a plurality of light-redirecting elements having transparent planar and / or curved facets (10-13b); each element comprises a facet (10) for transmitting incident light (19), a facet (12) for internally reflecting the transmitted light, at least one facet (11) intermediate and adjoining the facets (10, 12), and a further section (13a, 13b, 52) for separating the facets from those of adjacent elements. Internal angles at the junctions between the first and intermediate, and the intermediate and second, facets (10 &11, 11 &12) are at least 90° and no greater than 180°. The front face (20b) of the screen (20) may comprise black stripes (15, 53) and lenticular lenses (14, 40a, 59) to enhance the contrast of the screen. Improved tolerances in manufacturing of the tooling for the screen (20) and against minor component misalignments during system assembly are hereby provided, as are improvements to the robustness of the screen microstructure.

A method is proposed, how to produce a holographic screen for projection of the three-dimensional color images, where a narrow and elongate slit-shaped diffuser is recorded on a hologram as an object to ensure the well defined viewing zone forming in the course of the image projection. Further to the back side of the holographic screen a mirror is attached to transform it into reflection mode of operation. Further, the holographic screen is rotated under a control of an eye-tracking system to provide viewing zone movement together with a viewer's eye. Also, a diffuser with vertical light scattering is attached to a surface of the holographic screen to increase a vertical size of a viewing zone of the holographic screen. In addition, two or more holographic screens manufactured by this method are combined in a mosaic manner to form a big size holographic screen.

A first light diffusion layer (1) and a second light diffusion layer (2) are provided. The first light diffusion layer (1) is formed by dispersing a first light diffuser (1B) comprising fine particles in a first base material (1A) formed of transparent resin by 20 to 50 wt %, the fine particles of the first light diffuser having a refractive index different from that of the first base material by 0.07 to 0.17 and having a weight average particle diameter of 1 to 12 mum, and the first light diffusion layer having a thickness of 50 to 200 mum. The second light diffusion layer (2) is formed by dispersing a second light diffuser (2B) comprising fine particles having a weight average particle diameter of 1 to 12 mum in a second base material (2A) formed of transparent resin by 0.1 to 10.0 wt %, and the second light diffusion layer having a thickness of 500 to 5000 mum and a Haze value of 50 to 85%.

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.

There is known a telecommunication terminal with a miniature display for received, visually perceptible information, such as, for example, fax messages. In addition, a device is known for projecting computer images or TV images, the device comprising a so-called DMD chip (Digital Mirror Device). It is proposed to improve the aforedescribed telecommunication terminal (MS) by providing the terminal with projection means (DMD, FL) which can basically only be used for the device described above. In addition, the device described above is improved by being provided with an interface circuit for connection to a telecommunication terminal. Accordingly, the conventional means known in the field of computer technology and TV technology for projecting images are now used in or for a telecommunication terminal, especially in a mobile radio telephone (MS). With the received image data, images can be projected directly onto a projection screen, for example, onto a wall. Several people can view the images simultaneously. An output device, such as, for example, a printer for fax messages, is not required.

A very low cost computer comprising a motherboard socketed to receive selected components including a processor, memory modules, and interface controllers for connecting to peripheral devices, in combination with a micro-projection display system. The display system employs a low resolution imaging device such as a transmissive or reflective spatial light modulator in combination with an image deflection system for dithering a sequence of low resolution images from the imaging device as a composite high resolution image directed to either a front or rear projection screen. The system may be used in laptop computers and other portable electronic devices such as PDAs and cellular telephones, and in eyeglass-mounted displays.

A telepresence communication system for group meeting rooms and personal home and office systems provides improved human factor experience through substantially life size images with eye level camera placement. The system provides switched presence interfaces so that conferees can select when to transmit their images during a conference and optionally provides individual microphones for each of conferee. Switched presence between presets of conferees are viewed on multipoint windows overlaying life-size images upon eye contact camera regions and eliminate seeing camera image movement during pan, tilt and zoom operations. An ambient light rejecting filter system enables an eye level camera to be hidden behind a projection screen and provides bright, high contrast images under normal meeting room and office environments. A telepresence organizational enablement system brings all the features of a corporate office complex and its social and organizational benefits, into a virtual community eliminating the need to centralize employees.

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.

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.

A first light diffusion layer (1) and a second light diffusion layer (2) are provided. The first light diffusion layer (1) is formed by dispersing a first light diffuser (1B) comprising fine particles in a first base material (1A) formed of transparent resin by 20 to 50 wt %, the fine particles of the first light diffuser having a refractive index different from that of the first base material by 0.07 to 0.17 and having a weight average particle diameter of 1 to 12 mum, and the first light diffusion layer having a thickness of 50 to 200 mum. The second light diffusion layer (2) is formed by dispersing a second light diffuser (2B) comprising fine particles having a weight average particle diameter of 1 to 12 mum in a second base material (2A) formed of transparent resin by 0.1 to 10.0 wt %, and the second light diffusion layer having a thickness of 500 to 5000 mum and a Haze value of 50 to 85%.