Abstract:
A method and apparatus geometrically makes correction in an optical computer input system (10). The correction commences by projecting a bright rectangular light (80) onto the screen to determine what correction is necessary and then record the necessary information for converting the coordinates to an adjusted relative coordinate.
Abstract:
A method and apparatus facilitates the alignment and light sensitivity adjustment of an optical computer input system (10), which includes a user (20) generated light (24) directed onto a screen (18) bearing a computer generated image, to convey information to the computer interactively by the user (20), even in a darkened room. The system (10) discriminates between the user (20) generated image, and the computer generated image. Devices facilitate the proper alignment of the system with the screen (18), as well as proper light sensitivity adjustments.
Abstract:
A stacked display panel construction (10) produces multishades of a single color, or a plurality of multiple colors (400, 500, 600). The system includes a nematic display panel (24) which, in one of its states, functions as a waveguide to rotate linearly polarized light from a colored polarizer (23), to produce noncolored light (NC1) from an output polarizer (25). In its other state, the display panel (24) twists the linearly polarized light to emit therefrom predominantly linearly polarized light for enabling the output polarizer (25) to emit colored light (R2). The method of making the construction includes adjusting the angle of rotation in the waveguide state of the panel (24), until only noncolored light (NC1) is emitted from the output polarizer (25). A display panel construction (800) includes three substantially identical nematic liquid crystal panels (824, 826, 828), associated electronic drive units (844, 845, 846) and associated polarizers (823, 825, 827, 829) for producing multiple colors.
Abstract:
A multiple color display system (10) employing a display device (16), having a plurality of pixel elements each having a set of three subpixel components and an interfacing unit (11) to couple a television signal to the active matrix panel. The interfacing includes a color enhancing unit (12) for defining composite pixel groupings in the active matrix panel and for causing each grouping to produce in excess of 185 thousand different color shading levels.
Abstract:
A method of making an LCD panel system (10) including selecting a pair of substrate panels (15) forming a peripheral seal (17) on one of the flat surfaces of one of the panels to define an area on the panel surface, distributing compressible optical spheres (31-34) over the area, aligning one substrate panel with the first and placing the second panel against the seal, in an aligned condition with the other to form a chamber. The panels are pressed together to form a fluid tight seal between the panels. Air is then evacuated from the chamber and an optical fluid (37) is introduced into the chamber.
Abstract:
A plurality of variable biasing devices (13, 15, 17) for controlling the deselect modes of operation of each stage (22, 24, 26) of the liquid crystal display panel assembly (11) to optimize substantially the contrast between each individual deselect state and corresponding select states. The devices include an isolation device (68) to enable the contrast between the select and deselect modes to be made, independently of the intensity adjustments for the select modes of operation.
Abstract:
A stacked liquid crystal display panel construction and method of aligning its pixel elements includes a liquid crystal panel assembly (16) having a plurality of programmable controlled pixel elements (20A, 30A, 40A) for adjusting the relative position of a light image transmitted by the assembly. The pixel elements are controlled programmably by an image control unit (60) that enables the addressing of the pixel elements to be selectively shifted for aligning optically pixels and for causing the display image transmitted by the panel assembly to be scrolled.
Abstract:
A liquid crystal projection panel construction and a method of making it include securing an interference color filter member (58, 60, 62) and a lenticular lenslet array plate (90) to a high resolution display panel to produce a bright, full color high resolution image.
Abstract:
A compact projection illumination system (6A) includes a low profile housing (20A) having an optical system (11A) for directing high intensity reflected light to an image forming display device (24A) mounted substantially horizontally in the housing (20A), a projection lens arrangement (22A) comprised of three groups of optical elements aligned along a common optical axis with a variable vertex length and wide field coverage angle, and a display control system (25A) coupled electrically to the image forming device (24A) includes a compression logic arrangement for compressing high resolution information by eliminating certain horizontal and vertical pixel image information during one frame cycle and by eliminating certain adjacent horizontal and vertical pixel image information during the next frame cycle.
Abstract:
A method and optical system auxiliary input calibration arrangement (10A) accurately and reliably discriminate between a user generated image and a video source generated image, such as one produced by a computer. The calibration arrangement includes amplifier devices (176a) for increasing the strength of a video information signal (178A) indicative of the video generated image, and a user generated auxiliary input signal (179A) indicative of an auxiliary input light image, without increasing spurious ambient light signals. A discrimination circuit (46A) generates a detection signal whenever the amplified information signals are greater than a predetermined reference level signal. The microprocessor (42A) controls the exposure time of the light sensing device and selects an appropriate level of amplification for the output signal from the sensing device to increase light sensitivity between the vieo source generated light images as compared to the user generated auxiliary light images. The optical auxiliary input arrangement (11B) accurately and reliably discriminates between user generated double click information without the need of the user being so steady of hand as to cause the auxiliary light information beam to illuminate the same precise location on the viewing surface during the double click operation.