摘要:
A flat panel display (12) includes a backplate (14) and a faceplate (16) attached to the backplate (14) defining a vacuum enclosure (18) therebetween. A spacer (46, 62, 64, 78, 80, 90) is positioned between the backplate (14) and the faceplate (16). The spacer geometry is anti-symmetrical and non-integral with respect to an array of electron emitters (30, 48, 76) on a cathode plate (22) overlying the backplate (14). The spacers have a curved surface (52, 78, 82) that is characterized by a radius r, or by a length d.sub.3 of a unit shape having bend angles .alpha. and .beta., whereas the electron emitter arrays are characterized by orthogonally arranged rows (32) and columns (34). The anti-symmetrical and non-integral relationship between the spacers (46, 62, 64, 78, 80, 90) and the electron emitters reduces the number of electron emitters and pixels (49, 77, 86) that are occluded by the spacers. Additionally, the anti-symmetrical and non-integral relationship permits the spacers (46, 62, 64, 78, 80, 90) to be randomly distributed between the backplate (14) and the faceplate (16) of the flat panel display (12). A spacer processing method includes the step of cutting ribbons from a thin spacer sheet, placing the ribbons into cavities within a mold, and heating the mold to below the annealing point of the spacer material.
摘要:
A liquid crystal device comprises a cholesteric liquid crystal material interposed between a transparent front plate and a back plate. The cholesteric liquid crystal material is switchable between a transparent state and a reflective state in response to an electric field applied in a first direction. In the reflective state the material reflects light characterized by a first wavelength when no electric field is applied. Electrodes are provided for applying an electric field lied to the cholesteric liquid crystal material in the reflective state in a second direction distinct from the first direction. In this manner the cholesteric liquid crystal material is altered to cause the material to reflect light characterized by a second wavelength different from the first wavelength. A display device may thus be produced having pixels capable of a wide range of colors, thereby achieving a multicolored image for the display.
摘要:
An apparatus, system and method for telepresence communications in an environment of a virtual location between two or more participants at multiple locations. First perspective data descriptive of the perspective of the virtual location environment experienced by a first participant at a first location and feature data extracted and/or otherwise captured from a second participant at a second location are processed to generate a first virtual representation of the second participant in the virtual environment from the perspective of the first participant. Likewise, second perspective data descriptive of the perspective of the virtual location environment experienced by the second participant and feature data extracted and/or otherwise captured from features of the first participant are processed to generate a second virtual representation of the first participant in the virtual environment from the perspective of the second participant. The first and second virtual representations are rendered and then displayed to the first and second participants, respectively. The first and second virtual representations are updated and redisplayed to the participants upon a change in one or more of the perspective data and feature data from which they are generated. The apparatus, system and method are scalable to two or more participants.
摘要:
A full color display and photocell device (100) includes a fast response liquid crystal display (105) that has a rate of at least 75 monochrome frames per second, a transparent panel light (140) behind the fast response LCD that can emit a monochromatic light beam having a selected one of three colors, and a photovoltaic cell (150) behind the transparent panel light that converts light energy emanating from the transparent panel light into electrical energy. The full color display and photocell device (100) may also include a controller (160) that synchronizes information coupled to the fast response LCD and controls the transparent panel light to emit a sequence of monochromatic light beams of three colors.
摘要:
The present invention provides a system for reducing the size of a projection display system. This is achieved by using an emissive imager that comprises a large number of emissive pixels. The emissive pixels provide both light output and light modulation functions. This eliminates the need for a separate illumination source. Each emissive pixel represents a pixel (or a sub-pixel for color projection) of an image to be projected. The light signals produced and modulated by the emissive imager are passed through a microlens array. The microlens array collects and reshapes the emitted light signals from the emissive pixels. Each microlens forms a light beam with a concentrated non-Lambertian radiation profile. The non-Lambertian radiation profile helps in effective collection of light at a projection lens. Finally, the projection lens collects this light and projects a magnified image on a projection screen.
摘要:
A cell of a combination full color and monochromatic display comprises a first polarizer, a second polarizer and an optical switching cell. The optical switching cell is positioned between the first polarizer and the second polarizer and is operable to alter the polarization of transmitted light. A backlight emits light that is incident upon the second polarizer. A hologram positioned between the backlight element and the second polarizer reflects a portion of an ambient light incident upon the hologram. The display may be operated in a first mode, for which the backlight elements emits light of a plurality of colors, and a second mode for which the backlight emits light of at most one color.
摘要:
The present invention provides a compact color illumination device (100) for emitting collimated light. The illumination device comprises a reflector cup (102), a blazed diffraction grating (108) formed on the inner surface of the reflector cup, and a plurality of light emitting sources (110) positioned linearly in a focal plane of the reflector cup. Each light emitting source emits a different color of light that is incident on the blazed diffraction grating. The light emitted by the light emitting sources is reflected by the blazed diffraction grating, wherein the reflected light is collimated.
摘要:
A selectable three dimensional virtual pointer (501) that can be selected by a collaborator and displayed within a virtual collaboration environment (200) as being sourced by an avatar (202) that corresponds to the collaborator who selected the pointer. This pointer can be used, for example, to point towards a given object (205) within the virtual collaboration environment. So configured, in a preferred approach this orientation with respect to source and target persists regardless of which collaborator views the pointer (and hence the perspective view of the pointer varies with respect to the viewer in order to ensure this orientation).
摘要:
A head-up display includes an image source, such as a laser scanner, a means for diffusing light and a transparent element that can include a holographic element. The laser scanner emits a visible light for generating an image. The means for diffusing light receives the visible light from the laser scanner to project the image thereon, and preferably apply gain thereto. The transparent element produces a virtual or a real image of the image from the means for diffusing light. In a vehicle, the head-up display is configured to reflect the image into the vehicle to provide a virtual image ahead of a driver.
摘要:
A dual mode display (100) includes a monochrome reflective direct view display (110) and a full color virtual display (150) located behind the monochrome reflective direct view display. The monochrome reflective direct view display includes a display panel (112) having a first pixel arrangement and a narrowband reflector (114) located behind the display panel. The virtual display has a second pixel arrangement, wherein each pixel emits light in one of three primary color bands through the monochrome reflective direct view display, and wherein the light emitted by each pixel, in combination with light emitted by other pixels of the virtual display, generates a full color virtual image from the dual mode display. In one embodiment the virtual display is a virtual high information content display and the three primary color bands (205, 210, 215) do not overlap a first color band of the narrowband reflector (220).