Abstract: A Braille display cell which may be embedded in one of a plurality of keys that are used to provide input to a digital data processor. Cursor controls identify a location in text containing characters, and, in response thereto, the processor produces a Braille actuation signal which identifies the character located at said position. The Braille actuation signal, in turn, generates a Braille indicator of the character on the Braille display cell. With the assistance of the cursor controls, the text can be scanned to cause the Braille indicators corresponding to the characters in the text to appear sequentially on the Braille display cell thereby displaying the text in Braille so that said text can be read tactilely.

Abstract: In a display system for a data processing system color words for display at sequential pixels are obtained by addressing a lookup table memory with addresses obtained from a bit map display memory. Initialization data is stored in the display memory and, during an initialization procedure, is applied to the lookup table along the same data path used by the addresses during display. In one system a multiplexer takes the form of a shift register into which sequential pixel addresses are applied in parallel to interleaved stages. The two LUT addresses are read out sequentially by shifting the shift register. During the initialization procedure shifting is disabled and the interleaved address and data bytes are applied along separate address and data lines to the lookup table. One data path can be utilized for either eight plane or four plane display.

Abstract: In a display unit for use in projecting projection light onto a screen to display a picture, a light valve comprises a diffraction grating assembly for selecting one of chrominance components included in an incident light given through one surface of the light valve. The diffraction grating assembly is divided into a plurality of grating elements arranged to give different colors corresponding to the chrominance components. In addition, a control beam, such as a laser, is incident onto the other surface of the light valve to selectively scan the grating elements and to heat selected ones of the grating elements through an energy converting film. Thus, the incident light is subjected to modulation on the grating elements in accordance with heat energy and emitted through a liquid crystal as controlled light from the light valve. The controlled light is sent as the projection light to the screen.

Abstract: A cursor interface for a waveform display provides for movement of a waveform relative to a first cursor. When the first cursor overlies a desired point on the waveform, the cursor is locked to the waveform by transforming the cursor coordinates from display coordinates to waveform coordinates. The waveform may then be moved together with the first cursor relative to a second cursor. When the second cursor overlies another desired point on the waveform, a measurement value is displayed indicating the difference in positions on the waveform of the cursors. The cursors may be centered independently, and when locked to the waveform the result is to correspondingly move the waveform.

Abstract: The present invention generally provides an image display system having display means, image memory means for storing image data in the form of rows and columns of pixels with each pixel having a value representing the intensity level thereof, processor means for processing the image data on a selectable basis and in a selectable manner, and display memory means for receiving and storing image data from the processor means for use by the display means. The method of the present invention provides for displaying images from image data in the form of rows and columns of pixels with each pixel having a value representing the intensity level thereof, comprising the steps of: storing the image data in a random access memory means; selectively reading the image data from the random access memory means; selectively processing the image data read form the random access memory means; storing the processed image data in a display memory means for display purposes; and displaying the stored processed image data.

Abstract: Structures, for example pipe-lines and chemical process equipment, are provided with linear microphones sensitive to vibration associated with the structure. By monitoring the modulation of carrier signals in the microphone actual or incipient faults in the structure are detected.

Abstract: The present invention is, in a liquid crystal display apparatus, to increase a resolution by disposing every other one of picture element electrodes (P.sub.11 to P.sub.nm) with a displacement of 1/2 picture element pitch and also to obtain an excellent quality of picture by providing color filters (R, G, B) in association with these picture element electrodes.

Abstract: A shaker table (10) includes a table base (12) mounted upon isolating supports (32) and vibrated by vibrators (34, 36). The vibration is conveyed through and damped in a flexure member (16) comprising pairs (26, 28) of honeycomb layers (18, 20, 22, 24) joined and bonded together by sheets (42) utilizing beads of elastomeric adhesive which space the honeycomb layers apart. A segmented top plate (14) is secured to the topmost honeycomb layer and is divided into a plurality of sections or segments (68-82) for separate resonances. In this way, highly damped vibrational resonances of table top plate (14) are obtained.

Abstract: A gas discharge display apparatus consisting of a gas discharge display panel and a drive circuit for driving a matrix array of display elements formed in the display panel by mutually perpendicular arrays of stripe-shaped anodes and cathodes, the cathodes being sequentially selected during successive scanning intervals and the anodes driven to produce a light-emitting or non-emitting state during each scanning interval in accordance with display data. During each scanning interval, each anode for which the non-emitting state is to be maintained is momentarily driven to the light-emitting state potential during a brief interval, to thereby substantially increase the reliability of display operation during the immediately succeeding scanning interval.

Abstract: A driver circuit for a liquid crystal display for driving a liquid crystal panel in an A.C. manner. In this circuit, a display signal voltage to be applied to one electrode of the liquid crystal cell and a common voltage to be applied to a common electrode thereof are inverted in their polarity with a certain period, respectively, and at least one of the signal voltage and common voltage that are being polarity-inverted with the certain period is varied in its D.C. level by the same amount in the same direction in each period so that they can be adjusted so as to be in a predetermined relation for A.C. driving.

Abstract: A vector processing system including a main storage for storing vector instructions and vector data, an instruction register for holding a vector instruction read out of the main storage, a decoder for decoding the vector instruction held in the instruction register, and an execution unit, operative to implement a vector operation in response to an output of the decoder, including a facility which, when a sort instruction inclusive of a vector starting address, increment switching parameter and an operation switching parameter has been set up in the instruction register, implements a sorting process specified by the instruction for vector data stored in the main storage, the facility including a circuit in which the operation switching parameter is set and which produces an operation switching signal in compliance with the number of operations and the position of a vector element to be operated, a circuit in which the increment switching parameter is set and which produces an increment switching signal in com

Abstract: A detector for detecting the radiation state of a display surface is disposed in a cathode ray tube in order to improve the color reproducibility of a color display. Revise order signals as standard signals are applied to obtain a difference signal between the radiation quantity of a color signal that must be displayed originally and the output signal of the detector, and a circuit for compensating for the radiation order signal is disposed in a path through which the radiation order signal is applied to the cathode ray tube.

Abstract: Graphics display system having a moving cursor, such as a cursor, for selecting a displayed entity. The correlation of a cursor with an entity intended to be selected is performed by storing a unique tag assigned to each entity in a cell in a correlation array related to a pel or group of pels corresponding to locations in a bit map of the pels comprising the entity. The x,y coordinates of the cursor are converted into a cell number corresponding to the bit map locations matching such x,y coordinates. The entity tag is then retrieved from the addressed cell.

Abstract: A method of addressing a matrix addressed ferroelectric liquid crystal cell is described that uses parallel entry of balanced bipolar data pulses on one set of electrodes to co-operate with serial entry of unipolar strobe pulses on the other set of electrodes. Data entry is preceded with blanking (erasing) pulses applied to the strobe lines. The polarity of the strobing and blanking pulses is periodically reversed to maintain charge balance in the long term.

Abstract: A display apparatus including a display device which is formed with a plurality of display elements. A drive circuit supplies a drive voltage from a rectified AC commercial supply voltage to the individual display elements. A control circuit controls the drive circuit to sequentially energize the display elements over a phase angel of the AC supply which minimizes differences in the voltage applied across the individual display elements, thus avoiding flickering in the display of the display device even if fluctuations of the drive voltage applied to the display elements occur.

Abstract: A data input system of a multi-window mode in which a plurality of logic pictures can be displayed on a physical image screen of a CRT display. An input data once stored in a specified area of a memory is displayed in a selected one of the logical pictures. The system includes at least one logic picture designating device equipped with an indicator lamp, and transfer keys for designating one of the display fields in the logic picture. In accordance with combinations of designation and non-designation of the logic pictures, a data input path of the stored input data to the logic picture in which cursor is present or the logic picture in which cursor is absent is exchangeably selected, whereby the data stored in the specified memory area is transferred for display to the field designated by the transfer key in the selected picture through the input path as established.

Abstract: A matrix-type display panel comprises a display panel having a plurality of scanning lines, a plurality of data lines and a plurality of picture elements disposed at each intersection of the scanning lines and data lines, and analog switching elements for sampling-and-holding information signals which are applied to the data lines in synchronism with scanning signals applied to the scanning lines. The matrix-type display panel is driven by a driving method comprising: applying such switching pulses to the analog switching elements that time-serial pulses among them and shifted in phase from each other and overlap each other in a same duration.

Abstract: A pointing and control device for moving a cursor on a visual display and for controlling various operations, being operated by hand and finger movements, including both fine movement control and gross movement control; the assembly includes a graspable outer cover and an inner puck with a finger cup movably supported by a series of elements, a laser beam movement detector consisting of high and low frequency scanners, drivers, lower and upper photodetectors and signal amplifiers and processors. The entire assembly may be either fixed on a keyboard or operated as an independent accessory.

Abstract: An ultrasonic inspection device having an array of opposing transducers that longitudinally, transversely, and obliquely transmit sonic beams through tubular members having a range of diameters such that refracted beams meet on the inner surface of the members. Alternate halves of the array of transducers transmit and receive sonic beams reflected from defects in the tubular members using both the pulse-echo and pitch-catch methods.

Abstract: A remote parameter monitoring system utilizes a series of half-wave rectifier diodes in combination with a unique overlapping wiring arrangement to provide for location-specific detection of a parameter condition existing at a plurality of spaced locations. In one embodiment of the invention, the system is used for monitoring cracks in helicopter rotor blades and indicating to the crew in the cockpit both the fact of a cracked blade and the specific blade which is cracked. In such embodiment, the system includes a three-phase alternating current transformer whose primary windings are supplied by the helicopter's three-phase alternating current generators and whose secondary windings make up part of the wiring loops between the cockpit and the rotor blades. By controlling currents flowing in opposite directions in the wiring loops, the system allows for blade-specific crack detection of up to six rotor blades by means of only three wires between the rotor blade assembly and the cockpit area.