|
Match
|
Document |
Document Title |
|
|
7141942 |
Digital device for correcting the image formed on the screen of a cathode ray tube
Device for correcting the line and/or frame fields of a deflector for cathode ray tube comprising: a current sensor for evaluating the value of a line current Ila series of comparators intended to...
|
|
|
6831415 |
Circuit and method of controlling vertical and horizontal screen sizes of cathode ray tube monitor
In a circuit and method of controlling the horizontal and vertical screen sizes of a cathode ray tube (CRT) monitor, the circuit includes a horizontal screen size compensation circuit, an east-west...
|
|
|
6704056 |
Horizontal deflection circuit and television receiver
A video signal conversion part of a horizontal deflection circuit deletes a prescribed number of horizontal scanning lines from a vertical blanking interval of an input video signal and assigns a...
|
|
|
6661188 |
Cathode ray tube filament voltage control with a multifrequency deflection scanner
A power supply for a video display tube includes a deflection transformer with a primary winding powered with a scan voltage which has a first value when displaying signal according to a first...
|
|
|
6654066 |
High-speed flat-panel display interface
A display interface is arranged to processes analog input signals to provide digital output signals. The display interface includes a series of programmable current sources, an input buffer...
|
|
|
6392369 |
Digital realtime convergence correction circuit and method thereof
A convergence correction circuit including a coordinate unit which sets a predetermined range with first level values according to a screen length; an interval unit which divides the screen length;...
|
|
|
6359398 |
Method to control CRT phosphor aging
Methods and apparatus are provided for equally aging a cathode ray tube (CRT). A video input terminal is coupled to the CRT and receives an external video signal. Control circuitry is provided,...
|
|
|
6232904 |
Scanning system for film recorder
A scanning system for a film recorder utilizes multiple digital-to-analog converters (DACs) to produce a linear output for a vertical deflection circuit which drives a vertical yoke circuit for...
|
|
|
6111371 |
Switch control signal generator
A scan frequency detector is responsive to a horizontal synchronization signal to generate a data signal that is indicative of the horizontal scan frequency. A digital-to-analog (D/A) converter...
|
|
|
5969655 |
Digital convergence correction device outputting an analog correction signal
A digital convergence correction device converts correction data into serial data by using a parallel/serial converter, and further converts the serial data into an analog correction signal by...
|
|
|
5793166 |
Image display device comprising a cathode ray tube
An image display device (1) which includes a cathode ray tube is provided with a cathode system (2) for the emission of a plurality of electron beams (3) whereby a phosphor screen (4) is scanned in...
|
|
|
5771029 |
Side pincushion control apparatus
A side pincushion control apparatus for compensating for a horizontal picture size control voltage and a side pincushion in a monitor. The apparatus compensates for the horizontal picture size...
|
|
|
5740064 |
Sampling technique for waveform measuring instruments
A new sampling technique for waveform measuring instruments (including methods and circuits for implementing same) comprises the step of processing a series of digital signal samples through a...
|
|
|
5581163 |
Generator of periodic signals
A periodic signal is produced by counting pulses of a clock during a given period of time. The number of pulses counted is divided by a whole number. A count is then made of the number of pulses of...
|
|
|
5473223 |
Vertical deflection waveform generating apparatus
A vertical deflection waveform generating apparatus is provided to have a memory in which a function of a vertical deflection waveform is previously stored. The function is a function with an order...
|
|
|
5389859 |
Display device including a correction circuit for correcting a position error, and correction circuit for use in such a display device
A display device often includes a correction circuit for correcting a position error which is caused by the fact that the deflection signals are not (any longer) in conformity with the video...
|
|
|
5359265 |
Display apparatus having plural scanning frequencies
A display apparatus for displaying a video image operates with plural horizontal scanning frequencies. The apparatus includes a horizontal scanning frequency oscillator for generating a signal in...
|
|
|
5355058 |
Horizontal deflection waveform correction circuit
A deflection apparatus comprises a deflection amplifier coupled to a deflection waveform modulation circuit such as a diode modulator. An East-West modulation signal is generated by a digital to...
|
|
|
5339011 |
Display device
A display device comprising a CRT having a reduced number of components for automatic cutoff adjustment. The device needs an IC having a less number of connection pins. The device adds reference...
|
|
|
5321339 |
Protection of cathode ray tubes
To avoid burn in a scanning cathode ray tube, the address of the scanning spot at each clock period is recorded in a memory. During each frame period, the logarithms of the number of occurrences of...
|
|
|
5294866 |
Raster distortion correcting signal synthesizer
A raster distortion correcting signal synthesizer includes a multiplier, an adder, a memory for storing data and a coefficient, and a controller for controlling the multiplier, adder and memory in...
|
|
|
5272421 |
Digital image correction device
An image correction device includes a memory (70) for storing correction data, an address generator (15,31) for supplying addresses to the memory, a regulation pattern generator (40), a DA...
|
|
|
5239243 |
CRT beam deflection system
Disclosed is a system having a memory mapped deflection to control the position of an electron beam within a CRT used to project a color image onto a photographic medium for printing. A horizontal...
|
|
|
5223768 |
Data display apparatus with function for correcting effect of external magnetic field
A data display apparatus with a function for correcting the effect of external magnetic field including a display, a driving circuit for driving the display, an adjuster for adjusting a display...
|
|
|
5204589 |
Data signal controlled oscillator for a video display
The free-running frequency of a bus controlled horizontal oscillator is adjusted by programming of a first data signal that is coupled to a digital-to-analog converter. The programming causes the...
|
|
|
5099179 |
Remote raster/stroke display calibration
A remote registration and calibration system for a hybrid video display. The registration and calibration functions are performed by a computer. Display mounted switches are advantageously...
|
|
|
5059872 |
Digital convergence correction device
The digital convergence correction device is used for a projection-type television receiver having a Braun tube with an aspherical surface fluorescent screen and a projection lens system with an...
|
|
|
5013978 |
Compensation arrangement for display systems
A compensation arrangement for a display system that adaptively compensates the display parameters thereof for each pixel position to provide a precise display image that automatically adapts to...
|
|
|
5012163 |
Method and apparatus for gamma correcting pixel value data in a computer graphics system
Methods and apparatus for providing pixel brightness correction in monitors. The methods and apparatus disclosed herein provide significant cost reductions in gamma correction circuitry by first...
|
|
|
5010284 |
Device for the optical recording of rapid processes with a TV camera
The invention relates to a device for the optical recording of rapid proceses with a TV camera, which comprises means for deviating and suppressing the beam, in order to make the scanning beam run...
|
|
|
4980614 |
Convergence correction circuit
A convergence correction circuit according to the present invention has a phased locked loop including a programmable counter. The programmable counter has programmable count start and end points....
|
|
|
4970442 |
Correction circuit used in horizontal deflection circuit for the correction of image distortion
A correction circuit is used with a horizontal deflection circuit, for the correction of an image distortion. The correction circuit comprises a line memory for sequentially fetching and storing...
|
|
|
4933769 |
Picture display device including a staircase generator
A picture display device includes a generator for generating a periodical staircase-shaped signal for addressing picture elements on display screen. The initial value of the staircase shape is...
|
|
|
4874992 |
Closed loop adaptive raster deflection signal generator
A raster deflection signal generator that generates deflection signals in accordance with sweep control signals provided by a programmable timing generator. The programmable timing generator stores...
|
|
|
4870329 |
Digital convergence circuit storing coefficients of fundamental waves of correction data
A digital conversion circuit with a convergence deviation correcting circuit. A coefficient storing circuit stores coefficients of fundamental correction waves. By weighting these fundamental...
|
|
|
4868465 |
Sweep generator error characterization
A delay time between the start of a trace on an oscilloscope screen and a point along the trace is computed based on measured "sweep gain" and "sweep start" parameters characterizing a triggered...
|
|
|
4812717 |
Sweep circuit for oscilloscope
The oscilloscope sweeping circuit includes a first D/A converter which converts sweep rate step digital data into a charge current under the weighting of a reference current applied thereto. The...
|
|
|
4801851 |
Oscilloscope memory control
A memory control for use with a digital oscilloscope having a display and a digital memory storing a sequence of signal samples. The sequence of signal samples is cyclically read from memory and...
|
|
|
4802098 |
Digital bandpass oscilloscope
A digital bandpass oscilloscope permits an operator to observe both time and frequency domain plots of analog signal components of frequency within a passband of selected center frequency during a...
|
|
|
4799000 |
Display control apparatus
Horizontal and vertical deflection windings in a deflection yoke coil assembly of a CRT (cathode ray tube) having stroke written or raster scan displays are driven by x and y analog deflection...
|
|
|
4779028 |
Digital storage oscilloscope with marker for trigger location
A digital storage oscilloscope comprises an analog-to-digital converter for receiving an analog input signal and generating a succession of data words representative of the instantaneous magnitude...
|
|
|
4771193 |
Synchronizing circuit
A synchronizing circuit for an oscilloscope or the like, in which in the case where a sync input signal contains composite periods like a PCM signal or video signal, it is identified to generate a...
|
|
|
4760313 |
Cathode ray tube display systems
A CRT display system providing a raster pattern, possibly for a flat screen CRT, has an oscillator driving a Line counter. The Line counter drives a Field counter and a Line DAC. The Field counter...
|
|
|
4754205 |
Oscilloscope having auxiliary display of a labelled cursor
An instrument for providing a principal display representing the variation of a first quantity as a function of a second quantity, comprises a display screen. A visually distinct dot is generated...
|
|
|
4754204 |
Digital apparatus for convergence correction
Digital apparatus for convergence correction of a plurality of images on the screen of a television monitor includes a digital registration circuit, or an analog registration circuit using a...
|
|
|
4721943 |
Digital-to-analog converter for video application
A digital-to-analog converter comprises a current source for supplying a current of predetermined magnitude to a circuit node, and a switch connected to the circuit node, and defining a first...
|
|
|
4703230 |
Raster operation circuit
In a graphic display apparatus having a digital differential analyzer (DDA), a chrominance data stored in a register is written in an area of a bit map memory defined by coordinates generated from...
|
|
|
4673847 |
Color monitor with improved digital convergence
A color video monitor is disclosed which includes improved digital convergence using a plurality of memory means in which vertical convergence correction values are stored, one memory each for red,...
|
|
|
4649506 |
Vector generator using interpolative analog circuits
Vector (i.e., line) drawings represent the "intelligence" content of images.A method is disclosed for the gathering of intelligence and the generation of vectors on the screen of a CRT without the...
|
|
|
4598234 |
Digital image correction circuit for cathode ray tube displays
A digital electron optics correction circuit for correcting the focus and astigmatism in a displayed image on a CRT is disclosed. The circuit includes a clock generator for generating a selected...
|