Abstract: A display panel image stabilization method and apparatus includes enabling a user to adjust both the pixel clock pulses and the synchronization for the display panel simultaneously by a single control. The synchronization is adjusted in a stepwise manner through a given number of steps for a particular number of clock pulses. The image is observed by the user to determine whether or not the noise stripes are being eliminated. The stepwise adjustment of the synchronization is repeated for another particular number of clock pulses if the noise stripes are not being eliminated. Once all of the stripes have been eliminated from the image, both the synchronization and the pixel clock pulses are properly adjusted to stabilize the image.

Abstract: A method and apparatus geometrically makes correction in an optical computer input system.

Abstract: An intelligent display system presentation projection arrangement and method include the conversion of presentation display information into portable document format information for supplying it to an intelligent display system, which subsequently converts the portable document formation information to presentation display information. A controller responds to the converted information for controlling a projection display unit for causing the display presentation images to be projected onto a remotely located viewing surface. The intelligent display system of the arrangement replaces the separate computer with a unit which is either connected to the projection display unit, or incorporated therein. By utilizing the conversion to portable document format information, any computer platform may be employed, and the information is displayed at the highest resolution available to the projection display unit.

Abstract: A liquid crystal projection panel construction includes an incident light substrate assembly spaced apart from an light exiting substrate assembly having a plurality of pixel elements for enclosing a liquid crystal assembly therebetween. The incident light substrate assembly includes a microlens array having a plurality of microlenses disposed at about a surface of engagement between the incident light substrate assembly and the liquid crystal assembly for converging light through corresponding pixel elements. The incident light substrate assembly further includes a plurality of interference filters disposed at about the surface of engagement, and in registration with the corresponding microlenses and pixel elements for projecting a bright, high quality, full color image.

Abstract: A logic arrangement for causing a display image of a given resolution to be displayed in an adjusted size to accommodate a projection display system, which, in turn, can project the adjusted image. The system also enables an image to be zoomed in size prior to projecting it.

Abstract: A new and improved ferroelectric liquid crystal display system having a matrix structure of pixel elements each including a transistor active switching device and a ferroelectric cell. Each switching device is coupled to an individual storage capacitor which is charged during each row select time when the switching device is activated, and which is discharged during each frame time when the switching device is deactivated. A plurality of multi-level or analog column drivers supply selected drive currents to charge individually the storage capacitors of a row of pixel elements to desired initial voltage levels corresponding to desired gray scale levels for the pixel elements during a row select time to maintain the liquid crystal pixel images for lengths of time proportional to the initial charge levels of the capacitors, which discharge until their individual voltages reach a threshold voltage within predetermined discharge times during one frame time.

Abstract: The laser illuminated image projection system includes a microlaser array coupled with a beam shaper to produce an exceptionally bright projection light beam. In one embodiment, the beam shaper includes a binary phase plate to modify the shape and intensity profile of the projection light beam. In another embodiment, the beam shaper includes a microlens array arrangement. In yet another embodiment, the beam shaper includes a diffuser arrangement. A light valve modifies the projection light beam to generate an output light beam indicative of an image. A projection lens arrangement focuses the output light beam onto a remote surface to reproduce the image thereon.

Abstract: The laser illuminated image producing system includes in one form of the invention, a single light valve which not only serves to form an image, but also to increase the number of its colors. In another form of the invention, the lasers are sequenced at high input energy for short intervals of time to provide high average output luminosity at lower average energy costs.

Abstract: The projection lens arrangement includes a projection lens assembly having a plurality of lens elements aligned in a common optical path, and arranged in a generally Tessar configuration. One of the lens elements is movable along the optical path in a linear fashion. Another one of the lens elements is movable along the optical path in a non-linear manner, wherein the two lens elements move along the optical path substantially concurrently. The movement of the non-linearly moving element is slaved to the movement of the linearly moving element. A field lens element directs the flux from an image display unit to the entrance pupil of the projection lens assembly.

Abstract: A new and improved display control system which includes a logic arrangement for causing auxiliary light information projected from a hand held light generating device upon a projected primary image to be integrated into the primary video image upon command from a user. A display control circuit causes the underlying primary image to be altered to include an accentuating image indicative of the path of travel followed by a spot of auxiliary control light as it is directed by a user via the hand held light generating device. A color control circuit responsive to user input commands enables the accentuating image to be displayed in one of at least eight primary colors. An erase control circuit also responds to user input commands to enable the user entered accentuating images to be deleted selectively individually or in total simultaneously.

Abstract: A projector and a method of using it includes an expandable housing, which includes a display panel assembly, and an illumination and display panel projection optics arrangement. The housing includes housing portions which are movably mounted relative to one another, to increase the overall dimensions of the housing adjustably to accommodate the display panel optics arrangement during use as a projector.

Abstract: A liquid crystal projection panel construction and a method of making it includes securing an interference color filter member and a lenticular lenslet array plate to a high resolution display panel to produce a bright, full color high resolution image. The panel construction is small in size, and relatively inexpensive to manufacture.

Abstract: A method and optical system auxiliary input calibration arrangement 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 for increasing the strength of a video information signal indicative of the video generated image, and a user generated auxiliary input signal indicative of an auxiliary input light image, without increasing spurious ambient light signals. A discrimination circuit generates a detection signal whenever the amplified information signals are greater than a predetermined reference level signal. A microprocessor calculates the appropriate predetermined reference level signal based upon ambient lighting conditions, the strength of that portion of the information signal indicative of the video image, the type of optical system and the distance the optical system is disposed away from a viewing surface.

Abstract: A new and improved display control system which includes a logic arrangement for causing a displayed image indicative of a portion of a corresponding larger image to be displayed upon an input command from a user. A line control circuit responsive to user input commands enables the displayed image to be shifted visually from a current visualization position, up or down, row by row for line pan visualization of corresponding portions of the larger image. A pixel control circuit also responsive to user input command enables the displayed image to be shifted visually from a current visualization position right or left, column by column, for column pan visualization of corresponding portions of the larger image. The line control circuit and the pixel control circuit operate independently of one another or in combination with one another to achieve any desired panning effect.

Abstract: A method and system for producing a finely textured display image of a gradation of high color resolution color shading. The high color resolution system is adapted to be coupled to a relatively inexpensive high speed active matrix display panel employing single-bit LCD drivers and a plurality of sub-pixel elements. The system includes a sub-pixel activation circuit for generating single-bit digital signals for driving individual ones of the sub-pixel elements. A duty cycle circuit arrangement controls the sub-pixel activation circuit to cause desired ones of the sub-pixel elements to be activated selectively an average number of times over a large number of consecutive frame time intervals to generate sub-pixel images having desired perceived color shading levels.

Abstract: The display device image stabilization apparatus is utilized in a display system having a frame buffer coupled to a display device. The apparatus includes a sampling arrangement coupled to the frame buffer for sampling input video data to generate a display signal, wherein the display signal is stored temporarily in the frame buffer as buffer information. A control device is coupled to the frame buffer for comparing the buffer information with reference information to determine whether the buffer information and the reference information are similar to one another. The control device generates a gain adjustment signal when the buffer information and the reference information are different from one another. Coupled between the control device and the sampling arrangement is a phase lock loop circuit for varying the display signal in response to the gain adjustment signal.

Abstract: An image projection system includes a bright light source of polarized light, and in one form of the invention, a spatial light modulator, having an alignment layer, to modulate the polarized projection light, wherein the bright polarized light source is aligned with the alignment layer to permit the polarized light to pass therethrough without the need for unwanted light blocking polarizers. The spatial light modulator generates output light representative of the image, which is projected by a projection lens system onto a remote viewing surface to form a bright image thereon. In another form of the invention, three different colored images are each produced by three separate polarized light sources illuminating three individual light valves, and are superimposed to produce a full color image while all three light sources are maintained fully activated to provide a brightly illuminated image.

Abstract: A computer input system for a computer generating images appearing on a screen. For the purpose of modifying the images appearing on the screen, a light generating device causes an auxiliary light image to appear on the screen. An image sensor responds to the auxiliary image, and a circuit responds to the sensor for causing auxiliary image information to be stored concerning the auxiliary light image. Another circuit responds to the stored auxiliary image information to supply the auxiliary light image information to the computer for utilization therein.

Abstract: Light pre-polarized in a particular plane is divided into a plurality of paths, where each path includes a reflecting mirror, a dichroic mirror and a liquid crystal display. The light in each display is selectively modulated and combined for projection purposes. The displays are rubbed in directions coordinate with the display peripheries to enhance the contrast of the light passing through the display.