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7034817 |
Method and device of alignment of a video image with an edge of a display screen
The aligning a video image with an edge of a display screen, the video image being displayed by a scanning of lines of the display screen by at least one electron beam modulated by a modulation...
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6967758 |
System and method for sub-pixel electronic alignment
In one embodiment, a delay circuit is configured to delay pixel information from an image source, such as a frame buffer. The delay circuit may be configured to delay the pixel information by an...
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6804569 |
Distributed manufacturing with feedback
Methods and apparatus implementing a technique for assembling a device, such as a digital convergence monitor, at more than one site where data is supplied from a first site to a second site and...
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6642676 |
Electromagnetic quadrupole circuit which independently corrects ac and dc components of correction current
An electromagnetic quadrupole circuit capable of always performing the optimal correction of the spot form is provided with: a current detecting section 20 for detecting the peak value and bottom...
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6580233 |
Cathode ray tube and intensity controlling method
Disclosed is a cathode ray tube and a intensity controlling method achieving a reduced amount of factors for correcting intensity prepared and capable of performing proper intensity control so that...
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6567058 |
Digital convergence correction device and display device
A problem to be solved by the invention is to prevent a digital convergence correction device from lowering in precision of correction performed when a relation between screen raster and effective...
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6538705 |
Image projecting system
In a system according to the invention, fine image data 2 created and output by a personal computer 1 is input to an image processing/dividing section 4 . The image processing/dividing section...
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6496231 |
Method and apparatus for correcting convergence and geometry errors in display devices
An apparatus for correcting convergence and geometry errors in a display device re-maps the positioning of pixels in a video signal based on predetermined convergence and geometry errors in a...
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6473139 |
Data error recovery for digital beam landing error correction arrangement
In a video display, correction data for a digital convergence arrangement are stored in a first non-volatile memory. During power turn on procedure, the correction data are read out of and stored...
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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;...
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6362579 |
Circuit for correction of deflection errors in a television display
A circuit for correction of deflection errors in a television set, in which a correction current having alternate forward-sweep and flyback periods is supplied to a correction coil for an error...
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6148112 |
Digital image correction device and display device
A digital image correction device in which correction data at correction points corresponding one by one to positions on a CRT screen displayed by raster scanning system is stored as a relation...
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6128048 |
Convergence correction apparatus for projection television and method thereof
An improved convergence correction apparatus for a projection television and a method thereof which are capable of moving a convergence correction data corresponding to modes to a memory during a...
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6008596 |
Convergence adjustment method and convergence adjustment circuit
A convergence adjusting method and a convergence adjusting circuit, for improving the preciseness of adjustment while reducing a time required for the adjustment and for avoiding an occurrence of...
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5939843 |
Adaptive convergence adjustment for multi-scan monitor
The present invention relates to a multi-frequency display system and method for providing color convergence. The system comprises a convergence circuit that is configured to receive a first set...
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5883476 |
Convergence correction system with recovery function and display apparatus using the same
A plurality of photo detectors are arranged outside the display screen of a projection display apparatus having a built-in digital convergence correction system and a function for adjusting data in...
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5835029 |
Digital convergence apparatus
NTSC convergence adjusting data corresponding to a plurality of portions on a display screen is stored in a data storage section in advance. Convergence adjusting data is stored in a field memory...
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5790210 |
Apparatus and method for digital convergence correction
Among the total sampling points for digital convergence, a portion are selected as seed points. Correction data of each of the selected seed points is efficiently stored in a first memory. The...
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5734233 |
Digital convergence apparatus
The invention presents a digital convergence apparatus of high precision, relating to a digital convergence apparatus applicable to a color display device for displaying various image information...
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5694181 |
Digital convergence correcting circuit
A digital convergence correcting circuit for digitally correcting a convergence of R, G and B, which includes a memory for storing only seed data and a convergence correcting part for interpolating...
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5657079 |
Correction for monitor refraction using empirically derived data
A system for transforming coordinate systems in an automated video monitor alignment system includes a camera and computer to capture an image of the display bezel surrounding the cathode ray tube...
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5627605 |
Method for correcting digital convergence of multi-mode projection television
A method for correcting digital convergence performed with respect to four modes of NTSC, ED, MUSE and ZENITH only by adjusting the convergence for a single mode on a software basis includes the...
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5592240 |
Digital convergence apparatus
A digital convergence apparatus using two different kinds of data to correct the convergence of odd and even scanning lines, respectively. A first memory stores data for the convergence correction...
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5506481 |
Registration error correction device
A device for digital convergence correction of raster distortion correction of a picture displayed on a screen of a display device using a cathode-ray tube, in which scanning lines include a first...
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5473394 |
Convergence measuring apparatus
A convergence measurement apparatus for a color cathode-ray tube is capable of high precision convergence measurement by elimination of luminance omission portions occurring in the screen. A dot...
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5463427 |
Dynamic focusing device for cathode ray tube
A dynamic focusing device for cathode ray tubes comprising a crosshatch pattern generator for providing a surface of cathode ray tubes with a crosshatch pattern indicating an adjustment point at...
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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...
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5369450 |
Electronic and computational correction of chromatic aberration associated with an optical system used to view a color video display
Methods and systems are presented in which at least one geometric distortion function is separately determined for application to a particular primary color component of a color video display to...
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5352959 |
Method and circuit for generating the control voltages of the dynamic convergence in a color display tube
A method and a circuit for generating the control voltages of the dynamic convergence in a color display tube, in which the current of the convergence coils (HC, VC) is controlled. The control...
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5345280 |
Digital convergence correction system and method for preparing correction data
A digital convergence correction system and a method of preparing a convergence correction data used for an image display unit, including at least one cathode ray tube, are disclosed. Correction...
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5301025 |
Parabolic waveform generating apparatus
Horizontal or vertical parabolic waveforms corresponding to arbitrary aspect ratios are generated with a relatively small number of memory devices for storing data values which are used for...
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5298985 |
Image correction apparatus for adjusting images by digitially controlling analog correction waveforms
An image correction apparatus uses digital correction data from a memory device, in which various correction data is stored, and various analog correction waveforms for implementing, through...
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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...
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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...
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5041764 |
Horizontal misconvergence correction system for color video display
A method for use in a raster-scanned electron beam display for displaying an image signal. The image signal is clocked out of a store at a variable clock rate correlated with beam location. The...
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5012332 |
Correcting data reading device in a digital convergence correcting device
A digital convergence correcting device effecting convergence correction by using convergence correcting data stored in a memory which includes an address fixing device which, in the case where...
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4992706 |
CRT raster distortion correction circuit
A circuit for correcting raster distortion on a CRT display screen. Horizontal distortion is corrected by overscanning and providing complementary modification of the time delay and data rate at...
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4977446 |
Digital convergence correcting apparatus
A convergence correcting apparatus is used in a projection television receiver including a CRT having an aspherical fluorescent screen and a projection lens apparatus which is attached to the...
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4849676 |
Color image display tube apparatus
Of three electron beams produced by an in-line type color cathode ray tube having a deflection device for producing uniform vertical and horizontal deflection fields, two beams are driven by G and...
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4835602 |
Color projection television system with apparatus for correcting misconvergence and misgeometry which calculates coefficients of equations representing deflection correction waveforms
A projection television convergence method and apparatus allow rapid and simple correction of low-order misconvergence and misgeometry problems. A hybrid system employs digital programmable...
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4816908 |
Color video projector with a convergence adjustment device which imposes an automatic sequence of multi-zone convergence adjustment steps
A convergence adjustment device for color video-projectors having three monochrome tubes, each projecting an image of a give color on a screen. This device acts on the scanning of the second and...
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4814858 |
Method of measuring color purity of color display and apparatus therefor
Disclosed are a method of measuring the color purity of a color display having phosphors in the shape of dots and an apparatus therefor which are capable of quantitatively measuring the state of...
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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...
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4703231 |
Flat type image display tube and display device using the same
In a flat image display tube, a phosphor screen having an image display region and index region, a plurality of electron beam generators and a plurality of horizontal deflection electrodes are...
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4686429 |
CRT color convergence measurement
A computer controlled system for measuring convergence in a multi-electron beam color cathode ray tube (CRT) provides a high speed coarse search and fine search sequence for locating the position...
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4680510 |
Color monitor with improved synchronization
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,...
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4672275 |
Digital process and apparatus for convergence correction having adjustment points and correction portions determined by the adjustment point selected
A plurality of images superimposed to form a composite image on the screen of a television monitor are brought into convergence (register) by forming a reference image on the screen, the reference...
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4620136 |
Digital vertical beam landing correction circuit
Circuitry corrects vertical beam landing errors for color cathode ray tubes. A digital delay circuit provides horizontal scan line video pixel information at its proper location to produce a...
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4451824 |
Color convergence data processing in a CRT color display station
A preconverged color display station is disclosed which is compatible with a computer controlled control unit that provides electrical convergence control signals. Compatibility is obtained by...
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4441057 |
Correction apparatus for a cathode ray tube
Non-linearities of an electron beam in a cathode ray tube are corrected in accordance with the position of the beam by circuitry which completes the correction from stored digital values. In...
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