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| Number | Title | Issue Date |
| 7199533 | Convergence control apparatus for video display A convergence control apparatus for a video display is provided. In the apparatus, a convergence controller receives a vertical synchronization signal and a horizontal synchronization signal and then outputs a vertical convergence correction voltage and a horizontal... | 04/03/2007 |
| 7166972 | Vertical deflection apparatus A vertical deflection apparatus supplies a vertical deflection current to a vertical deflection coil to deflect an electron beam in the vertical direction of a screen. The apparatus includes: a vertical deflection current output circuit that outputs a vertical defle... | 01/23/2007 |
| 7158193 | Image misconvergence correction apparatus for less switching noise influence Disclosed is an image misconvergence correction apparatus having a correction value generation unit for calculating a convergence correction value to correct misconvergence occurring when a video signal is scanned on a display device; an amplification unit for perfo... | 01/02/2007 |
| 7034901 | Convergence optimization in a projection display A projection display comprises three cathode ray tubes each having a deflection yoke and convergence yoke and each tube generating a raster for projection. One of the three cathode ray tubes has the convergence yoke coupled for current flow in a direction opposite t... | 04/25/2006 |
| 6078151 | Simple dynamic focus circuit having saw wave generating circuits In a dynamic focus circuit for a CRT, a first saw wave generating circuit generates a first saw wave signal in reponse to a horizontal synchronization signal, and a first amplifier amplifies the first saw wave signal with a first gain. Also, a first diffe... | 06/20/2000 |
| 5565744 | Waveform generation A position-dependent waveform (WCi) is generated by generating a set of functions (fl (I1), . . . ,fp (I1),gl (If), . . . ,gr (If)) from position information (I1,If). A sub-set of functions (fnl (I1),... | 10/15/1996 |
| 5414329 | Voltage variation compensation arrangement for sample and hold capacitor An analog multiplier generates an output signal that is coupled to a convergence winding of a projection television. The analog multiplier multiplies a horizontal rate sawtooth signal with a vertical rate parabola signal. The multiplier DC operating point... | 05/09/1995 |
| 5345151 | Automatic calibration in a waveform generator for deflection An analog multiplier is used for generating an output signal that is coupled to a convergence winding of a projection television. The analog multiplier multiplies a horizontal rate sawtooth signal with a vertical rate parabola signal. To prevent temperatu... | 09/06/1994 |
| 4970500 | Shadow mask color system with calligraphic displays A display system is disclosed utilizing a cathode ray display device utilizing three electron beams which are directed through a shadow mask to excite three-color phosphor dots, and which is incorporated in a system to alternately provide raster scan disp... | 11/13/1990 |
| 4961030 | Miss convergence compensating device for projection type display The present invention relates to a miss convergence compensating circuit of a projection type display. The projection type display is provided with three projection tubes for red, green and blue colors and a color image is obtained by combining three colo... | 10/02/1990 |
| 4849652 | Circuit for producing a periodic, essentially parabolic signal A circuit for supplying a periodic, essentially parabolic signal by squaring a sawtooth-shaped signal. For eliminating a disturbance occurring during the retrace period, a signal is generated during this period whose polarity is opposite to that of the pa... | 07/18/1989 |
| 4839568 | Magnetic deflector for trichromatic tube with shield and method to set this deflector A magnetic deflector of the saddle-saddle type, for a trichromatic tube protected by a shield, with in-line guns and round-luminophor type screen, is designed to function with a saddle-torus type of magnetic deflector. The invention uses a saddle-saddle t... | 06/13/1989 |
| 4683405 | Parabolic voltage generating apparatus for television A dynamic focus voltage generating circuit for television generates a parabolic voltage at the horizontal rate that is responsive to a synchronizing signal. The parabolic voltage is generated from a sawtooth waveform having an upramping portion, a downram... | 07/28/1987 |
