Abstract: An ultrasonic imaging system which is used to provide contact imaging of a component. A transducer is scanned across a workpiece to collect image data from a scan area comprising a plurality of pixels. Means for resiliently carrying the transducer with two separate degrees of freedom maintain a tight acoustic coupling between the workpiece surface and the transducer. The image data relating to each position in the scanned area describe the amplitude of a reflection and its depth from a reference. Means are provided for easily varying the size of the image area while the number of pixels remains constant. The system provides a real-time visual display of the scanned area while the transducer is moving over the area in contrast as either a grey scale or a color scale for each pixel. An automatic calibration mode for the sytem is provided as another feature to remove acoustic delay, caused by transducer coupling, from the image data.
June 1, 1984
Date of Patent:
June 6, 1989
Science Applications International Corporation
Charles T. P'an, Dean E. Christie, Robert H. Grills
Abstract: A display device interface circuit comprises a primary skew circuit for skewing a video signal for a predetermined period converted to a serial signal; a secondary skew circuit for skewing a blank signal which determines the flyback time for a predetermined period; and a logic circuit for adding signal outputs of the secondary skew circuit to the head and tail of the video signal skewed by the primary skew circuit for a predetermined period.
Abstract: A liquid crystal display provides a high quality color image and efficient energy utilization. A layer of liquid crystal material is controlled by a transparent electrode matrix that is fixed to one surface of a fiber optic plate. A matrix of (primary color emitting) phosphors, each in alignment with a transparent electrode, is fixed to the opposed surface of the plate. A source of fluorescent energy excites the phosphors. A filter located behind the fiber optic plate reflects visible light, both ambient and that emitted from the phosphors. The fiber optic plate acts as a relay lens and prevents cross pixel color contamination while the generation of backlight by the phosphor conversion of fluorescent to visible energy is a highly efficient process.
Abstract: A computer-controlled video display presents alphanumeric or graphic data to a human user in a fashion selected to provide user control of the data transfer rate and to increase mental concentration, comprehension and creativity. A set of video display regions or windows are defined having selected positions and areas for presenting data obtained from one or more registers or buffers. Associated with each display window is a set of stored parameters controlling the display of data in the window. The control parameters include parameters designating the size and location of each window, foreground and background colors and display intensity or pulsation, and the source of the data to be displayed.
April 11, 1986
Date of Patent:
December 27, 1988
Profit Technology, Inc.
Orest J. Bedrij, Orest W. Bedrij, Alan L. Rogers
Abstract: A multimeter with variable color digital display indicates measured values in digital format and in variable color. The multimeter includes a color control circuit for selectively controlling color of the digital display in accordance with the measurement quantity, method, unit, mode, function, range, location, modifier, control, limits, and the like. A color converter circuit is disclosed for converting analog voltage to variable color.
Abstract: A memory address signal for a display memory is generated from a memory address generating circuit. The memory address generating circuit has an offset register and a memory address counter in addition to a memory address register. The offset register stores an offset value corresponding to a difference between a width of the display memory and a width of a display picture in a scanning direction. The memory address counter counts up a character clock in order to deliver the memory address signal after loading a start address of each horizontal scanning line of the display picture. At the end of each horizontal scanning line, an adder adds the offset value to the memory address signal. The addition thereof is loaded into the address register as the start address of the next horizontal scanning line.
Abstract: A display control system can implement a gray-scale display of an image composed of a plurality of display dots on a display screen. A plurality of luminance data each representing an intensity level of a corresponding one of the plurality of display dots are first generated. Each luminance data is then converted into a pulse signal whose pulse number corresponds to an intensity level of the corresponding display dot represented by the luminance data. And, each display dot on the display screen is activated in accordance with a corresponding one of the thus produced pulse signals. To eliminate flicker of the display dots, the display dots on the display screen are grouped into a plurality of display sections each composed of a predetermined number of adjacent display dots, and if the display dots in one display section are equal in intensity level, these display dots are activated by the pulse signals which are equal in pulse-number but different in phase.
Abstract: In a method of driving a liquid crystal panel using one horizontal period (1H) as a reversal period, the liquid crystal panel using a TFT as a switching element for driving the panel in units of divided blocks and comprising the block division TFT's (B-TFT), a matrix circuit for driving each block in time division, and a TFT active matrix panel; each block of the B-TFT's is further divided into two half-blocks and a control signal shifted in phase between adjacent two half-blocks is applied to time-divisionally drive the liquid crystal panel at superposed timings. High intensity lines produced at the intersection of blocks due to the charge sharing effect are eliminated to thereby enable a high quality image to be produced.
Abstract: The specification and drawings relate to liquid crystal matrix display panel which is used to display a television image or the like and disclose the technology in which: the pixels on a matrix are divided into at least two groups of pixels, in particular, two right and left pixel groups; these pixel groups are respectively independently driven within one horizontal scanning interval; thereby widening the width of the vertical scanning signal and allowing the image signal to be sufficiently transferred to the liquid crystal cells; and thereby allowing a high-quality image to be displayed without causing a lack of luminance or a variation in luminance in association with the realization of a large area and a fine pitch of the display panel.
Abstract: The invention provides a display matrix system using display elements of the electromagnetic type. The system differs from others in that the currents applied to the display elements are unidirectional as there are no electrical switching components per element. This reduces the drive circuitry needed for the matrix. Selection of the display elements relies on current pulses of variable width.In accordance with an aspect of the invention each one of a row or column of coils are connected together by N conductors, such that it is only necessary to drive 1/N of the coils in a row or column at a time:In accordance with a further aspect of the invention means are provided which enable variation in the electrical pulse width applied to a display element in response to variation of one of ambient temperature and supply voltage.
Abstract: A video image processing system and method for encoding and storing a video image in a bit map array. The system receives a raster scan video signal which it converts into an analog luminosity signal. Then, during each of a preselected repeating sequence of raster scan cycle periods, it encodes a corresponding preselected portion of the information in the analog luminosity signal as a binary value and stores the value in a bit map memory array. As a result, the video image is encoded and stored over a plurality of raster scan cycle periods.
Abstract: A method of forming a matrix image used in various devices with an image processing function.In the image forming method, each image segment constituted by an m.times.n dot matrix is divided into at least one element, and each element is defined by a parallelogram on a basic matrix. The image segment is encoded according to characteristic features of the parallelogram. Data signals representing each image segment are stored in a set of at least one coded element in a memory. The dot patterns of the entire image are formed according to image segment display data. Even a complicated pattern can be smoothly and clearly formed. In addition, processing for obtaining an enlarged image or a rotated image can be simplified and performed with a small-capacity memory.
Abstract: The present invention is a digital switching power amplifier particularly adapted for generation of a high power output from a digital input signal. The digital input signal, comprising a series of M bit digital words at a predetermined sampling rate, is compared with a digital ramp signal which counts through the range from zero to 2.sup.M. A similar second comparison is made between an inverted digital input signal and the digital ramp signal. These comparisons control separate application of one of two polarities of a DC power source to corresponding terminals of the load device. The net voltage coupled to the load is a two polarity pulse width modulated signal corresponding to the digital input signal. In an alternative embodiment the second comparison is between the digital input signal and a digital ramp signal of the opposite slope.
Abstract: The output of a noise canceling first or second order electret gradient microphone in a very high noise environment has background noise attenuated and certain phonemes shaped to improve intelligibility by means of a slow action automatic gain control circuit 22 which matches dynamic range of the microphone 10 with dynamic range of the following communication channel, and a fast action automatic gain control circuit 24 in parallel with the first circuit, that reshapes puff noise into plosive, fricative and affricative speech component signals that produced the puff noise.
April 14, 1987
Date of Patent:
September 13, 1988
Hughes Aircraft Company
John M. Williams, III, Donald P. Warther, Robert C. Lawson
Abstract: An area fill technique for graphic images is disclosed wherein the contour lines constituting an image are given in a series of line segments or a series of vectors, and horizontal line segments are ignored. Each line segment other than the horizontal ones is specified by the coordinate addresses for the start and end points in one direction, that is, from top to bottom or from bottom to top. Each is then converted into approximate pixels in the X-Y coordinate system, and stored in a random access work memory. The pixels of each line segment are stored in the work memory according to a rule whereby each line segment is represented by one pixel per horizontal line, and is written by taking exclusive OR of its pixels, excluding the start point, with read pixel data at corresponding coordinate addresses in the work memory.
April 18, 1986
Date of Patent:
August 9, 1988
International Business Machines Corporation
Abstract: A method for positioning cursors at a specific point on a displayed waveform uses a cursor to determine the maximum and minimum points on the waveform about a transition portion. For each position of the cursor between the maximum and minimum points an intersection between the cursor and the waveform is computed as a percentage of the difference between the maximum and minimum points. The cursor is then positioned at a point on the transition portion where the percentage is a desired value for the specific point.
Abstract: A transmitting type display device is disclosed, which comprises a transmitting type display panel to provide a display on the front surface, a light source for producing light illuminating the back surface of the transmitting type display and a brightness controller for controlling the intensity of light from the light source. The device comprises an ambient light detector disposed near the transmitting type display panel for detecting the intensity of ambient light incident on the display surface of the transmitting type display panel, and the brightness controller for controlling the light source according to the detection output of the ambient light detector such that the intensity of light from the light source to the transmitting type display panel is increased with an increase of the detected light intensity.
Abstract: A color thin-film EL display device is disclosed which comprises an EL light emitting layer including a plurality of regions emitting light of different colors and groups of electrodes for selectively applying voltage to each of the regions in the EL light emitting layer. The EL light emitting layer has three kinds of regions exhibiting the three primary colors and the regions of each kind are disposed in a distributed manner.
Abstract: Touch controlled zoom of a waveform display uses a touch screen for the display surface. Function buttons for moving or expanding the waveform display and for determining the axis of such movement or expansion operate in conjunction with a rotary encoder. Expansion, or zoom, is accomplished by contacting the screen overlying a point on the waveform about which zoom is desired. Such contact or activation of the expand function button results in movement of the rotary encoder providing a gain parameter to a zoom function. The zoom function operates on the waveform display in an exponential manner as a function of the gain parameter to expand or contract the waveform display about the zoom point according to the direction of rotation of the rotary encoder.
Abstract: A device for electronically generating a plurality of single still pictures which are stored in the device's self-contained programmed digital memory cartridge and which is displayed on a liquid crystal screen. The device is a structure resembling a thin pocket calculator.