Motorola Corporation

Diana C Chen

Phil Wright

Karen E Jachimowicz

Fred V Richard

Rong-Ting Huang

Michael S Lebby

Davis H Hartman

William M Peterson

Barbara M Foley

Earnest J Johnson

Wenbin Jiang

Hsing-Chung Lee

Thomas B Harvey, Iii

James William Bishop, Jr

Norbert Kleiner

George R Kelly

Cheng-Ping Wei

Marc H Wildy

An optical wireless communications system () comprises a server or transceiver hub () transmitting and/or receiving optical communications with geographically dispersed subscriber units () via optical beams. The transceiver hub () transmits a beam pattern that has an efficient, rectangular, flat-topped far field optical profile, thus permitting less complex and less expensive transceiver equipment to be employed in the transceiver hub () and in the subscriber units (). In one embodiment, the transceiver hub () comprises an optical source (, FIG.), an asymmetrical lens such as a cylindrical lens (, FIG.), and a diffraction element such as a diffractive phase plate (, FIG.). Various methods of shaping an optical transmission profile are also described.

Methods and apparatus for beam shaping in optical wireless communications system

A teleconference system including a plurality of personal presence cells positioned at a local communication site and at a remote communication site. The plurality of personal presence cells are characterized as either sensor cells or display cells. The sensor cells include at least one video camera positioned to sense and transmit an image of the local participant, and an image screen positioned to reflect an image of the local participant toward the at least one video camera and for viewing of an image through the screen. The display cells each include at least one projection display positioned to display a multi-dimensional image of a remote participant on a display screen. A transmission link interfaces the plurality of personal presence cells positioned at the local communication site and the plurality of presence cells positioned at the remote communication site.

Teleconference system with personal presence cells

A digital scanner composed of a plurality of individually addressable scanning elements. Each of the plurality of individually addressable scanning elements capable of operating in discrete states in response to digital input signals applied to the digital scanner, thereby providing for either a straight passage and optical deflections or displacements, of a light beam passing therethrough dependent upon the state of operation of each scanning element. The scanner thereby capable of steering light over many positions according to digital input signals.

Digital scanner employing recorded phase information and method of

A non-speckle laser projection display composed of a liquid crystal material for the generation of a high resolution, non-speckle image. The projection display screen includes a liquid crystal material which is constructed in a highly scattered state when no drive voltage is applied. When a high frequency, low voltage signal is applied to the liquid crystal projection display screen, the liquid crystal molecules vibrate slightly at a frequency higher than 60 Hz, thereby causing the speckle pattern to change quickly, and causing the eye to smooth out and see no speckle. In addition, provided is a non-speckle laser display system in which included is a laser image source and the liquid crystal projection display screen.

Non-speckle liquid crystal projection display

A full color organic light emitting backlight device for liquid crystal display applications defined by a first OLED panel, designed to emit light in a red bandwidth, a second OLED panel, positioned adjacent the first OLED panel and designed to emit light in a green bandwidth, and a third OLED panel, positioned adjacent the second OLED panel and designed to emit light in a blue bandwidth. The light emitting device having positioned on an uppermost surface a liquid crystal display. The device intended for incorporation into portable electronic devices. The device is fabricated to achieve a full color image using field sequential color techniques.

Full color organic light emitting backlight device for liquid crystal

A teleconference system including a display terminal composed of an image source, a plurality of optical elements, a display screen and a planar optical structure associated with an outermost surface of the display screen; a video camera positioned to receive a reflected image from the display screen and a transmission link to a distant teleconference system. The planar optical structure is formed integral the display screen, such as through molding, or the like, or alternatively affixed to the outermost surface of the display screen in the form of a coating, or a plastic of glass element. The planar optical structure includes a blazed grating, thereby providing for the transmission therethrough of a portion of light and the reflectance of a portion of light incident thereon.

Teleconference system with visual display terminal

A device and method for enhancing the viewing angle of a display including the positioning of a liquid crystal beam deflector on display device, such as a liquid crystal display device. The liquid crystal beam deflector is capable of deflecting a display image incident thereon, thereby deflecting a primary viewing axis, resulting in an altered viewing axis and/or a broader viewing cone. The resultant effect allows the user to view the display image from the altered viewing angle or at any position within the broader viewing cone, to provide for a higher contrast output image by deflecting the brightest image away from the direction of specular reflection in ambient illuminated reflective displays.

Device and method for enhancing the viewing angle of a display

An integrated electro-optical package including an array composed of a substrate having defined thereon a plurality of unit cells, composed of active and inactive areas. The substrate having positioned thereon a major surface, a plurality of sub-arrays and driver/control circuits. The sub-arrays, defining the active area formed within each unit cell, and being composed of a plurality of light emitting devices. The driver/control circuits mounted to the substrate within the inactive area of each unit cell. The electro-optical package fabricated to allow for scanning of the active area of each unit cell to create a resultant integrated image of increased resolution, without an increase in the number of pixels formed by the light emitting devices of the sub-arrays.

Display with inactive portions and active portions, and having drivers

A phase spatial light modulator composed of a liquid crystal cell and a liquid crystal polarization switch. The liquid crystal cell capable of creating a liquid crystal phase prism under the influence of an external voltage. The liquid crystal polarization switch capable of perpendicularly rotating the polarization of light impinging upon the liquid crystal polarization switch, prior to passage through the liquid crystal cell in response to an applied voltage. The modulator, or scanner, thereby capable of modulating the phase of light passing therethrough, resulting in a high resolution resultant integrated image.

Fast speed liquid crystal phase spatial light modulator for enchanced

A phase spatial light modulator composed of a liquid crystal memory cell and a liquid crystal polarization switch. The liquid crystal memory cell having phase information recorded during the fabrication process thereby affecting the liquid crystal material contained within the cell. The liquid crystal polarization switch capable of perpendicularly rotating the polarization of light impinging upon the liquid crystal polarization switch, prior to passage through the liquid crystal memory cell in response to an applied voltage. The modulator, or scanner, thereby capable of modulating the phase of light passing therethrough, resulting in a high resolution resultant integrated image

Multi-directional liquid crystal phase spatial light modulator for

A visual display system, composed of an array of light emitting devices, forming an image source, a phase spatial light modulator scanner, driver/control circuitry and an optical magnification system. The display system being enclosed within a housing, thereby forming an optical magnifier. The phase spatial light modulator scanner is operative in either a transmissive mode or a reflective mode. In operation, an external stimulus, such as a voltage, is applied to the scanner, thereby changing the phase of light emitted therethrough. The scanning action enhances display resolution of the generated resultant image without an increase in the number of pixels of the image source. The phase spatial light modulator scanner operates by scanning sub-pixels, pixel groups, and/or sub-arrays of the image source.

Visual display system for display resolution enhancement

A phase spatial light modulator composed of a liquid crystal cell having molecular orientation recorded during the fabrication process as a direct result of a photochemical reaction exerted upon the liquid crystal material, a mechanically-induced change of a liquid crystal alignment layer, or by varying a plurality of polymer materials that compose the liquid crystal alignment layer, thereby affecting the liquid crystal material contained within the cell. The modulator, or scanner, thereby capable of altering the phase, thus steering light passing therethrough. During operation, the liquid crystal molecules deflect the light beam passing therethrough based on their orientation as recorded during fabrication when the applied voltage is 'OFF' or in an altered state when the applied voltage is 'ON'.

Bi-stable non-pixellated phase spatial light modulator for enhanced

A phase spatial light modulator composed of a first liquid crystal cell and one or more additional liquid crystal cells. Each of the liquid crystal cells is positioned so that their extraordinary optical axis (N.sub.e) lies orthogonal to the next liquid crystal cell, and the group of cells is positioned along the optical axis of light emitted by an image source. The modulator, or scanner, thereby capable of steering substantially 100% of unpolarized light therethrough. The modulator intended for use within a display system additionally composed of an image source, driver/control circuitry and an optical magnification system. In operation, an external stimulus is applied, such as a voltage supplied by an external power source, thereby spatially changing the phase of light emitted therethrough. The scanning action enhances display resolution of the generated resultant image without an increase in the number of pixels of the image source.

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Gilbert, AZ, United States of America

Diana C Chen