Abstract: Computer main memory is used for storing relatively densely sampled green and detail information concerning a television display and for storing relatively sparsely sampled red information and blue information concerning the same television display. The relatively densely sampled green and detail information is read out in substantially real-time from computer main memory during line trace intervals in the television display. The relatively sparsely sampled red information and blue information are read out of computer main memory in advanced and compressed time during selected line retrace intervals in the television display.

Abstract: A system for identifying articles in accordance with light transmission through the article includes a light sensor which provides a signal indicative of the light transmission. A circuit responds to the signal and provides an output in accordance with the transmission levels. The output is provided to a control to identify the article and to adjust the illumination level to the article.

Abstract: A system for applying grey scale codes to a display device having a plurality of columns of pixels, has a segmented shift register, with one shift register segment for each pixel column. Data stored in the shift register segments are transferred to counters through multiplex circuitry. The counters control transfer gates by which voltages are applied to the pixel columns.

Abstract: Computer main memory is used for storing relatively densely sampled luminance information concerning a television display and for storing relatively sparsely sampled chrominance information concerning the same television display. The relatively densely sampled luminance information is read out in substantially real-time from computer main memory during line trace intervals in the television display. The relatively sparsely sampled chrominance information is read out of computer main memory in advanced and compressed time during selected line retrace intervals in the television display.

Abstract: An apparatus and method for cleaning a lens system utilizes a rotating turntable that sequentially moves a plurality of lenses parallel to a shielding plate from a preexposed position to an exposed position located adjacent an aperture in the shielding plate. The apparatus includes a first manifold for directing a first flow of gas across a surface of a lens located at the preexposed position, and a second manifold for directing a second flow of gas across a surface of a lens located at the exposed position. First and second vacuum nozzles remove, respectively, airborne particles within the first and second gas flows. An additional nozzle mounted adjacent the aperture provides an ionized gas.

Abstract: A getter flashing device includes low friction sloping guide numbers which direct a CRT toward a yoke. The yoke has a conical aperture which receives the funnel portion of the CRT. The wide end of the conical aperture forms a reference edge to position the getter within the CRT at a particular location. The yoke slideable supports a coil at the preselected location. The yoke is pivotable to bring the coil and the getter into substantial planar parallelism and to substantially center the getter with respect to the coil.

Abstract: A circuit for compensating for crystal variations in a liquid crystal display (LCD) utilizes four crystals arranged outside of the viewing area. Two of the crystals have a capacitance different from that of the other two and serve as reference crystals. The other two crystals serve as detection crystals and can have a capacitance equal to that of the display crystals. The detection crystals are biased to have a capacitance equal to that of the reference crystals. Changes in the detection crystal capacitance results in changes in the voltage across the crystals. The voltage changes are detected in a detection circuit and are applied to an adjustment circuit. The adjustment circuit produces an adjustment signal which is used to adjust the crystal drive voltage and to adjust the detection circuit.

Abstract: A digital arithmetic combiner having improved overflow signal propagation delay characteristics is disclosed. Such an arithmetic combiner includes a tristate device having a data input terminal coupled to an overflow input terminal and a data terminal coupled to an overflow output terminal. A tristate control terminal is coupled to the output of logic circuitry. The logic circuitry is responsive to operand input signals and enables the tristate device to generate a signal at its data output terminal when the operand input signals have different logic states. In addition, an overflow generator is responsive to the operand input signals, and generates a signal indicating overflow conditions at the overflow output terminal when the operand input signals have the same logic state.

Abstract: In field/frame recursive filters for providing noise reduction to composite video signal, inversion of the chrominance component of the composite video signal is obviated by selecting nearest neighbor in-phase field/frame delayed signals for recursion. The system arbitrates between two or more nearest neighbor in-phase signals or combinations thereof and feeds back the signal having an amplitude most closely matching the incoming composite video signal.

Abstract: Computer main memory is used for storing relatively densely sampled wideband video information concerning a television display and for storing relatively sparsely sampled narrowband video information concerning the same television display. The relatively densely sampled wideband video information is read out in substantially real time from computer main memory during line trace intervals in the television display. The relatively sparsely sampled narrowband video information is read out of computer main memory in advanced and compressed time during selected line retrace intervals in the television display. The wideband video information may be luminance information; and the narrowband video information chrominance information.

Abstract: A MOSFET analog signal squaring circuit is disclosed. A first MOSFET has a source electrode coupled to a bias voltage source, a gate electrode coupled to an input terminal, and a drain electrode coupled to an output terminal. A signal inverter is also coupled to the input terminal. A second MOSFET has a source electrode coupled to the bias voltage source, gate electrode coupled to the signal inverter, and a drain electrode coupled to the output terminal. A load impedance is coupled between the output terminal and a supply voltage source.

Abstract: A volume control or amplitude varying system for digital signals includes a cascade connection of a coarse multiplier/divider for changing the values of digital signals in 6 db steps and a fine multiplier/divider for changing the values of digital values logarithmically in substantially equal steps of less than 6 db per step. The coarse multiplier/divider selectively multiplies the digital signal by powers of 2. The fine multiplier/divider multiplies the digital signal by predetermined values, an ascending/descending sequence of which form a substantially logarithmic sequence. Both serial-bit and parallel-bit embodiments are described.

Abstract: In measuring the dots of a color picture tube panel the panel is scanned and energy passing through the dots is detected. A large number of lines are scanned and the scan data are stored in a matrix having a row for each scan line and, columns for the dots and the spaces between the dots. Data for a preselected number of dots and spaces are stored. When scanning occurs between rows of dots, the preselected number of dots is not scanned and zeros are put into the matrix. Data processing is simplified by searching the last column of the matrix for zeros and rejecting all rows of data having a zero in that column.

Abstract: An electroluminescent device includes a tin oxide electrode having a textured surface with a phosphor layer interposed between dielectric layers overlying the textured surface. The textured surface propagates through the overlying layers so as to reduce the amount of generated light trapped in the device structure and increase the output brightness of the device.

Abstract: Apparatus for multiplying a sampled data signal by a sinusoid having a period which is a multiple of the sample rate includes a plurality of sample scaling means to scale the sampled data signal by factors corresponding to the sine of angle .theta. over an angular range of 90 degrees in angular increments of 2.pi. divided by said multiple. A multiplexer multiplexes the scaled samples at the sample rate to produce a signal corresponding to the sampled data signal multiplied by the sinusoid. An embodiment is described for demodulating the stereo difference signal of a BTSC sound signal with serial-bit digital processing circuitry.

Abstract: A scaling circuit for scaling PCM signals by factors less than one includes a bit-shift and truncating circuit. Roundoff error compensating circuitry adds an offset value to the samples to be scaled by the bit-shift circuitry to compensate for errors produced by truncation without rounding. The offset values are dithered to increase the apparent resolution of the system.

Abstract: A display device, such as an LCD, has alignment layers made of different materials; thus one layer can have a low curing temperature so as not to cause damage to delicate organic layers, such as a color filter, during curing, while the other layer can have a larger tilt angle so as to minimize ambiguities in the liquid crystal material.

Abstract: A system for automatically clamping and unclamping objects into a carrousel having a plurality of incrementally movable carriers which support slidable trays, includes arms for unclamping a slide preventing detent and a foot for gripping the trays and sliding the trays away from the carrousel. An unclamping mechanism unclamps the objects so they can be removed form the trays. The tray is incremented to an unloaded position and a probe verifies the absence of an object. The tray then increments to a load position where another object is loaded into the tray and the clamps are automatically closed.

Abstract: A method and apparatus for heat sealing an electron gun mount, having a glass stem, into a neck of a cathode-ray tube includes a mount socket for supporting the mount within the neck and a plurality of burners for applying heat to the outside of the neck proximate the stem. The neck softens, thins and then seals to the stem, causing excess neck material that is lower than the stem, known as cullet, to be cut off. Prior to applying heat, a sleeve is disposed around the mount socket within the neck adjacent to the cullet, with a clearance between the sleeve and both the socket and the neck. A vibrating coil is attached to the sleeve for vibrating the sleeve while applying heat to the outside of the neck.

Abstract: A picture-in-picture image signal generator includes a source of an auxiliary video signal and an auxiliary synchronization component separator which produces an auxiliary odd/even field signal. Auxiliary image data is stored in a memory for subsequent retrieval. A source of a main video signal and associated synchronization component separator, which produces a main odd/even field signal, is also provided. A signal combiner combines a portion of the main video signal with data retrieved from the memory to form a picture-in-picture video signal. An interlace inversion detector generates a signal indicating an interlace inversion condition in response to the main and auxiliary odd/even field signals. A correction to the interlacing is made in response to the interlace inversion signal.