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| Number | Title | Issue Date |
| 6545813 | Lenticular lens sheet for projection screen A lenticular screen component of a rear projection display screen has lenticular elements formed on a viewer surface. Identical lenticular elements cover the entire lenticular screen component and are repeated horizontally at a constant displacement. A gi... | 04/08/2003 |
| 6473464 | Method and apparatus for processing video pictures, especially for false contour effect compensation With the new plasma display panel technology new kinds of artefacts can occur in video pictures. These artefacts are commonly described as "dynamic false contour effect", since they correspond to disturbances of gray levels and colors in the form of an ap... | 10/29/2002 |
| 6166926 | Zero voltage switching power supply with burst mode In a tuned switch mode power supply, a supply inductance is coupled to a capacitance to form a tuned, resonant circuit. A transistor switch is coupled to the resonant circuit for generating current pulses in the inductance, coupled to a load circuit to pr... | 12/26/2000 |
| 6157549 | Power supply with multiple mode operation A video apparatus includes a data acquisition mode (DAM) module. The DAM module contains memory to store a television program guide information. A standby supply voltage, derived from a first winding of a transformer, is coupled for energizing the DAM mod... | 12/05/2000 |
| 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 |
| 6114817 | Power Supply for a deflection circuit operating at multi-scan frequencies A television apparatus set has the capability of selectively displaying picture information obtained from a broadcast television signal and a display monitor data signal. A zero voltage switching switch mode power supply generates a higher voltage B+ supp... | 09/05/2000 |
| 6115085 | Focus voltage tracking circuit A direct current focus voltage applied to a focus electrode of a cathode ray tube that produces a blue image is set to slightly defocus the blue image for increasing the blue beam spot size. The increase in the blue beam spot reduces the saturation and al... | 09/05/2000 |
| 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 produces from the data signal an analog, output signal at a f... | 08/29/2000 |
| 6107904 | Asymmetry forming arrangement in a deflection winding A deflection yoke for a cathode-ray tube of a video display, includes a pair of horizontal deflection windings and a pair of vertical deflection windings. The pair of vertical deflection windings includes a saddle-shaped winding. The saddle-shaped winding... | 08/22/2000 |
| 6084490 | Saddle shaped deflection winding having a winding space within a predetermined angular range An deflection yoke for a color cathode ray tube includes a saddle shaped vertical deflection coil and a saddle shaped horizontal deflection coil. The horizontal deflection coil includes winding turns forming a pair of side portions having a winding window... | 07/04/2000 |
| 6072379 | Saddle shaped deflection winding having winding spaces in the rear A deflection yoke for a color cathode ray tube includes a saddle shaped vertical deflection coil and a saddle shaped horizontal deflection coil. The horizontal deflection coil includes winding turns forming a pair of side portions, a front end portion, cl... | 06/06/2000 |
| 6069546 | Saddle shaped deflection winding having a winding space A deflection yoke for a color cathode ray tube includes a saddle shaped vertical deflection coil and a saddle shaped horizontal deflection coil. The horizontal deflection coil includes winding turns forming a pair of side portions having a winding window ... | 05/30/2000 |
| 6052426 | Shift register using M.I.S. transistors of like polarity The subject of the present invention is a shift register for an LCD, the stages of which use the Boostrap [sic] effect and can contain just three M.I.S. transistors, as well as enhancements to this circuit with four or seven MIS transistors. The advantage... | 04/18/2000 |
| 6043994 | Power supply having a transformer for standby mode operation A power supply circuit for a video display apparatus having run and standby modes of operation. A resistor has a first terminal coupled to a power supply controller circuit for enabling operation of the power supply controller circuit. A standby mode powe... | 03/28/2000 |
| 5999377 | Holding device for stationary arranged write/read heads of a recorder A head carrier plate is pressed in the direction of the longitudinal axis of the videotape by spring force against stops. The audio control head bears with its lower edge on a support which simultaneously serves as a tape guide of the lower edge of the vi... | 12/07/1999 |
| 5995075 | Optimized method of addressing a liquid-crystal screen and device for implementing it The present invention relates to an optimized method of addressing liquid-crystal screens. In accordance with the invention, the matrix addressing method, periodically scanning each line with a signal of voltage VA (t) as a function of time, is... | 11/30/1999 |
| 5986898 | Switched-mode power supply with power factor correction Switched-mode power supplies require a power factor correction circuit in order to comply with anticipated regulations for the harmonic load on the line network. In its second current path, which produces a connection between a rectifier element and a tap... | 11/16/1999 |
| 5982641 | High-voltage power supply for video display apparatus A high-voltage power supply of a video display apparatus provides an ultor voltage and a focus voltage to a cathode ray tube. A low-voltage power supply provides a variable voltage to a primary winding of a flyback transformer of the high-voltage power su... | 11/09/1999 |
| 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 |
| 5969762 | Video signal driver including a cascode transistor A kinescope video driver includes a series connection of a main cascode transistor coupled to a cathode of a cathode ray tube and a video signal amplifying transistor. A second cascode transistor is coupled between the main cascode transistor and the vide... | 10/19/1999 |
| 5959851 | Switched-mode power supply control circuit A controller for a switch mode power supply includes an undervoltage protection circuit responsive to an input supply voltage indicative signal. The input supply voltage indicative signal is also coupled to a foldback point correction circuit. The correct... | 09/28/1999 |
| 5949660 | Switched-mode power supply having a standby mode In a switch-mode power supply, a transformer is used to transmit power during the forward-sweep time. The transformer is also used to transmit a control or regulating variable during the flyback time.... | 09/07/1999 |
| 5949398 | Select line driver for a display matrix with toggling backplane When a given row in an array of a liquid crystal display having a toggling backplane voltage is de-selected, the row select line voltage also toggles to prevent capacitive current in the pixel capacitance. The row select line driver includes a pair of tra... | 09/07/1999 |
| 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 |
| 5925991 | Electron beam focus voltage circuit There is provided a circuit and method for generating a focus voltage having a predetermined waveform and magnitude for application to an electron beam focus means of a cathode ray tube having a display surface. A horizontal deflection current having a pr... | 07/20/1999 |
| 5914574 | Stray emission reduction circuit The most popular method for reducing stray emission effects in a cathode ray tube is to install a bleeder resistor at the flyback transformer of the tube. Such a bleeder resistor is, however, quite expensive. Therefore, the stray emission reduction circui... | 06/22/1999 |
| 5910821 | Method and decoder for the processing of data within teletext pages For the transmission of additional data on a television channel the lines of the vertical blanking interval are used. It is intented to improve program information by so-called electronic program guides, which are based on the transmission of a large data... | 06/08/1999 |
| 5903451 | SMPS with a variable frequency start up circuit The invention relates to a switch mode power supply (SMPS) comprising control means (IP1) including an oscillator (OS) for generating a pulse-width modulated signal (V2). The object is to provide a fast start-up time over a wide mains input-voltage range ... | 05/11/1999 |
| 5900693 | Deflection yoke with saddle-shaped vertical deflection coils A deflection yoke for a cathode ray tube having a large, flat faceplate and a 4:3 aspect ratio includes a saddle-shaped vertical deflection coil. Most of the winding turns at a rear end portion are concentrated close to the beam entrance end of the coil. ... | 05/04/1999 |
| 5877946 | Forward converter with an inductor coupled to a transformer winding A forward converter includes a chopper transformer having a primary winding and one or more secondary windings. A corresponding rectifier and a corresponding filter capacitor is coupled to each secondary winding. An inductor is coupled in series with the ... | 03/02/1999 |
| 5859630 | Bi-directional shift register A bi-directional shift register for scanning a liquid crystal display includes cascaded stages. A given stage includes an output transistor having a clock signal coupled thereto. A first input section is responsive to an output pulse of a second stage for... | 01/12/1999 |
| 5856730 | Scan loss detector A display system includes a kinescope. A horizontal scan detector is coupled to a source of a horizontal scan current signal and detects a loss of horizontal scanning. In addition, a vertical scan detector is coupled to a source of a vertical scan current... | 01/05/1999 |
| 5841642 | Tuned switch-mode power supply with current mode control In a tuned switch mode power supply a zero voltage is maintained across a transistor switch, during both turn off and turn on switching transition intervals in the transistor switch. The tuned switch mode power supply operates in a current-mode control, o... | 11/24/1998 |
| 5841248 | Charge controlled raster correction circuit An East-West switching transistor is coupled between a flyback transformer primary winding and a horizontal deflection output transistor circuit to control retrace energy to obtain an East-West modulation of the deflection current amplitude as required fo... | 11/24/1998 |
| 5835361 | Switch-mode power supply with over-current protection In a tuned switch mode power supply a zero voltage is maintained across a transistor switch, during both turn off and turn of switching transition intervals in the transistor switch. The tuned switch mode power supply operates in a current-mode control, o... | 11/10/1998 |
| 5825638 | Switched-mode power supply control circuit A controller for a switch mode power supply includes an undervoltage protection circuit responsive to an input supply voltage indicative signal. The input supply voltage indicative signal is also coupled to a foldback point correction circuit. The correct... | 10/20/1998 |
| 5821842 | Deflection yoke locking arrangement A liner of a deflection yoke is provided with non-threaded sleeves. A slide pin is inserted into the sleeve until a head portion of the pin comes in contact with a funnel of a cathode ray tube on which the yoke is mounted. After adjustment, a wedge is ins... | 10/13/1998 |
| 5818159 | Electron beam deflection system for a cathode ray tube A deflection yoke for a cathode-ray tube, includes a pair of vertical deflection coils, a pair of horizontal deflection coils and a rigid separator insulating the pairs of deflection coils from each other. The separator has on its surface an arrangement f... | 10/06/1998 |
| 5783913 | Raster distortion correction arrangement A vertical rate signal generator is coupled to an integrator for producing a vertical rate parabola signal. The parabola signal is applied to a band-pass filter for producing a vertical rate sinusoidal signal that is applied to a convergence winding. When... | 07/21/1998 |
| 5781139 | Switched capacitor digital-to analog converter In a switched capacitor type digital-to-analog (D/A) converter, a group of n bits of the binary word are applied to n parallel branches of the D/A converter, respectively. In a given branch, the corresponding bit is applied to a control terminal of a corr... | 07/14/1998 |
