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| Number | Title | Issue Date |
| 7271553 | Deflection circuit to control base current of output transistor A horizontal deflection circuit having a horizontal output transistor that receives an input horizontal driving signal and drives a horizontal deflection coil includes a current controlling unit to selectively perform an operation to decrease a base current applied ... | 09/18/2007 |
| 7176877 | High voltage pulse driver with capacitive coupling A high voltage driver with capacitive coupling that is useful in the presence of the high power supply ripple common with higher-voltage systems. It permits extreme ranges of duty cycle, but without the limitations of transformer magnetics, or the increased complexi... | 02/13/2007 |
| 7064778 | Multi-camera system for implementing digital slow shutter video processing using shared video memory A technique, specifically a method and apparatus that implements the method, that allows a memory to be located remotely from a video source. Specifically, the method provides a write control signal between a video source and a remote memory that allows the remote m... | 06/20/2006 |
| 7023149 | CRT vertical scanning circuit with a low power standby The invention concerns a scanning circuit, comprising a power supply providing a negative voltage on a first terminal (Tdown), an intermediate voltage on a second terminal (Gnd) and a positive voltage on a terminal of a switch (S), the other terminal of the switch b... | 04/04/2006 |
| 6930520 | High bandwidth feed-forward oscillator A high bandwidth, feed-forward oscillator generates a ramp or sawtooth voltage for controlling the operation of a pulse width modulator-based, switched DC power supply circuit. The oscillator is operative to effectively immediately adjust the slope of each rising an... | 08/16/2005 |
| 6703802 | Saturation suppression of CRT output amplifiers The invention provides a circuit for controlling a cathode ray tube. The circuit comprises a source of input color signals (Uin (R), Uin (G), Uin (B)) for the primary colors of the cathode ray tube. Output amplifiers are c... | 03/09/2004 |
| 6690125 | CRT scan circuit with a geometry correction independent from the scan frequency A line scan circuit for a CRT, including, in series across a switch, two oscillating circuits having the same time constant, each including, in parallel, a capacitor, a diode connected in antiparallel, and a series association of an inductor and of a volt... | 02/10/2004 |
| 6686710 | Circuit and method for regulating current using autobias A circuit for regulating a signal, such as a cathode current. The circuit has an input stage for inputting a signal and for producing a sense signal based thereon. The circuit may input timing signals and have a first stage for comparing a first reference... | 02/03/2004 |
| 6674253 | Scan velocity modulation technique A video signal is split into a first signal and a second signal. The first signal includes low amplitude/high frequency components of the video signal, which can be properly amplified by a video amplifier. The second signal includes high amplitude/high fr... | 01/06/2004 |
| 6614193 | Deflection current modulation circuit A horizontal deflection circuit generates a horizontal deflection current in a deflection winding, during a trace interval and during a retrace interval of a deflection cycle. A transistor is responsive to a vertical rate parabola signal and to a negative... | 09/02/2003 |
| 6590353 | Device for the control of a circuit for the vertical deflection of a spot scanning a screen Disclosed is a device to control a circuit for the vertical deflection of a spot scanning a screen, and more particularly a control device whose output amplifier stage works in class D mode at the rate of a switching signal called a first switching signal... | 07/08/2003 |
| 6563276 | CRT display apparatus A CRT display apparatus capable of displaying images in high contrast and high brightness without causing noises and halftone-reproduction degradation within dark areas is disclosed. The apparatus includes a circuit for generating an R-control signal, a G... | 05/13/2003 |
| 6545435 | Cathode ray tube and signal detecting method in cathode ray tube A capacitor for outputting a reference signal is formed by using a part of an envelope. A reference signal according to an anode voltage is output from the capacitor for outputting a reference signal. An unnecessary signal component included in an index-d... | 04/08/2003 |
| 6512339 | CRT display device In a CRT display device including a CRT (MM tube) having brightness higher than that in the background-art CRT, it is an object of the present invention to improve contrast and prevent conspicuous recognition of noises. A video signal modulation circuit (... | 01/28/2003 |
| 6512340 | Temperature sensor with current mode output for thermal protection for a cathode ray tube (CRT) driver One embodiment of the present invention includes a temperature sensor with current mode output utilized within a cathode ray tube (CRT)-based display system for providing thermal protection to a CRT driver. Specifically, the current mode output temperatur... | 01/28/2003 |
| 6411048 | Method and device for controlling a circuit for the vertical deflection of a spot scanning a screen, in particular for a television set or a computer monitor The control device includes an output amplifier stage ETS supplied by a main supply for controlling the vertical scan of the spot, and an auxiliary supply capable of delivering an overvoltage and a first two-way switch connected to the output stage and co... | 06/25/2002 |
| 6369528 | Vertical deflection circuit A vertical linearity correction circuit including diodes and resistors is provided in a vertical deflection circuit, and a vertical deflection voltage applied to a vertical deflection yoke is corrected so as to follow a change in input impedance of the ve... | 04/09/2002 |
| 6351084 | Method and a device for reducing an electric field produced by a cathode ray tube in its surroundings The invention relates to a method and a device for reducing an electric field produced by display devices equipped with cathode ray tubes, in their surroundings. According to the invention, a part of a spectrum (ff), caused by a picture content, the level... | 02/26/2002 |
| 6326744 | Dynamic focusing circuit of a monitor system A dynamic focusing circuit of a monitor system capable of easily compensating a defocusing of a screen which often occurs in the monitor system which adopts a CRT. When vertical and horizontal parabolic signals is output from oscillation signal generating... | 12/04/2001 |
| 6313878 | Method and structure for providing an automatic hardware-implemented screen-saver function to a display product A hardware-implemented screen-saver prevents burn-in of an image displayed on a screen of a display product by automatically reducing the video gain, and therefore the contrast, of the image when the portion of the image within a two-dimensional detection... | 11/06/2001 |
| 6313590 | Compensation of vertical deflection A vertical deflection amplifier drives a vertical deflection coil according to a ramp input signal and has a current sensing resistor providing a feedback signal. The vertical deflection coil is subject to crosstalk or excitation by a horizontal deflectio... | 11/06/2001 |
| 6307335 | Braun tube discharge apparatus A Braun tube discharge apparatus that includes a so-called spot killer function. In the apparatus, an operational amplifier included in a vertical IC receives a vertical ramp signal from a one-chip IC at the non-inversion input terminal. The operational a... | 10/23/2001 |
| 6118233 | Dynamic focus voltage disabling circuit A video imaging apparatus includes a source of a periodic dynamic focus voltage blanking signal. A dynamic focus voltage amplifier includes a switch responsive to the dynamic focus voltage blanking signal for applying a dynamic focus voltage to a focus el... | 09/12/2000 |
| 6091212 | Circuit for adjusting a horizontal center of a raster for a monitor Disclosed is a circuit for adjusting a horizontal center of a raster displayed on a monitor CRT, which includes a current generating circuit which can control an amount of a direct current flowing through a horizontal deflection yoke of the monitor based ... | 07/18/2000 |
| 6091213 | Horizontal deflection circuit for a monitor A horizontal deflection circuit for a monitor is disclosed. The horizontal deflection circuit for a monitor includes a microprocessor for determining a mode of the monitor according to frequencies of the horizontal sync signal Hs and a vertical sync signa... | 07/18/2000 |
| 6087789 | Hybrid bridge magnetic deflection amplifier A magnetic deflection amplifier implemented using a linear amplifier connected to a first side of a deflection coil and a three pole switch connected to a second side of the deflection coil. The three pole switch connects the coil to ground during the act... | 07/11/2000 |
| 6002453 | Deflection with low offset A series arrangement of a deflection coil (Lf) and a series resistor (Rs) is connected between an output of a first output amplifier (1) and an output of a second output amplifier (2) to be driven in a bridge configuration for generating a deflection curr... | 12/14/1999 |
| 5982115 | Circuit arrangement for producing a vertical frequency deflection current A non-switched, DC coupled vertical deflection circuit includes a source of a first DC supply voltage that is coupled to a first end terminal of a vertical deflection winding. An amplifier is energized by a second DC supply voltage having twice the magnit... | 11/09/1999 |
| 5969487 | Deflection circuit with damping impedance and current compensation A deflection circuit generates a deflection current (If) through a deflection coil (Lf). The deflection circuit includes a series resistor (Rs) arranged in series with the deflection coil (Lf) to supply a feedback voltage (Vf;Vr), and a drive circuit (1,5... | 10/19/1999 |
| 5945792 | Sawtooth generator with gain control arrangement In a vertical sawtooth generator of a vertical deflection circuit, a first comparator generates an output signal when a retrace portion of a sawtooth signal is at a first magnitude to initiate a vertical trace portion of the sawtooth signal. An amplifier ... | 08/31/1999 |
| 5936680 | Multimedia television receiver A pump-up circuit includes a first capacitor C1 connected to the power supply Vcc via a first change-over switch SW1 to the reference potential point or a second capacitor C2. The second capacitor C2 is charged by the voltage control circuit 45 under the ... | 08/10/1999 |
| 5936363 | User controlled deflection apparatus for correcting upper and lower distortions of a CRT A system to correct and adjust horizontal-direction pincushion and barrel distortions of scanning lines caused at upper and lower portions of a picture screen of a cathode-ray tube includes a pair of coils provided at a neck portion of the cathode-ray tub... | 08/10/1999 |
| 5814952 | Device for correcting the ramp linearity of saw-tooth signals A device for correcting the linearity of ramps of a saw-tooth signal provided across a capacitor, charged by a first current source and periodically discharged at a desired frequency. The device modulates the charging current of the capacitor by a correct... | 09/29/1998 |
| 5789874 | Vertical deflection polarity switching circuit for CRT projector Such vertical deflection polarity switching circuit for CRT projector can be provided that enables external, one-shot operational switching of the vertical deflection polarity. To switch a CRT projector from a hanging type to a floor type, the switching c... | 08/04/1998 |
| 5770930 | Vertical deflecting circuit using a raised source voltage A vertical deflecting circuit comprises a vertical output circuit (12) which amplifies an input sawtooth wave signal and supplies a deflection current to a vertical deflection coil (13), a power source (14) which applies a source voltage to the vertical o... | 06/23/1998 |
| 5666032 | Linear scan control for a CRT display system In a highly accurate linear scan control for a CRT image display system useful for reproducing photographic images, distortion effects produced by system transients resulting from deflection drive amplifier circuits, are eliminated by introducing a step i... | 09/09/1997 |
| 5614793 | Deflection circuit responsive to differential sawtooth signals A pair of current sources, each having a high output impedance, are coupled to a pair of first and second inputs of a differential input stage of a vertical deflection amplifier. An output of the amplifier is coupled to a vertical deflection winding. A cu... | 03/25/1997 |
| 5587631 | Resistor-matched deflection apparatus for a video display In a D.C. coupled vertical deflection circuit, an input sawtooth signal is coupled to an inverting input of a vertical deflection amplifier via a first resistor network. A D.C. voltage is coupled to a second input of the amplifier via a second resistor ne... | 12/24/1996 |
| 5569985 | Amplifier for scanning beam velocity modulation Scanning beam velocity modulation or SVM may be employed to produce subjective enhancement of picture sharpness. However, impulsive SVM deflection current may produce unwanted crosstalk into other circuitry thus a circuit configuration is disclosed where ... | 10/29/1996 |
| 5504539 | Circuit for modulating vertical positions of a picture in a wide screen television This invention relates to a circuit for solving a vertical interlace phenomenon generated by the instability of servo control when a mode of VCR operation is fast or still, comprising a vertical pulse delay 101 for delaying a vertical pulse inputted from ... | 04/02/1996 |
