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| Number | Title | Issue Date |
| 7362010 | Currents-sensing switching circuit A current-sensing switching circuit includes a first terminal clamp for the current feed for a first unit, based on the state of a second unit the state of which is detected at a second terminal clamp. The first terminal clamp may be switched, based on the current t... | 04/22/2008 |
| 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 |
| 7221112 | Cathode ray tube display apparatus A cathode ray tube display apparatus having a fly back transformer (FBT) to induce and output high voltage, the CRT apparatus including: a power controller controlling source power input into the FBT; a DC power detector to output a shut-off signal to shut off an op... | 05/22/2007 |
| 7187371 | Display apparatus A display apparatus having a high voltage FBT driving circuit includes a transformer having a primary and a secondary coil, a high voltage detector to detect an output voltage of the secondary coil, a high voltage compensator to output a high voltage compensating si... | 03/06/2007 |
| 7170239 | Circuit and method for reducing east-west geometry mismatch between the top and bottom of a raster display The present disclosure describes a technique for reducing east-west geometry mismatch between the top and bottom of a raster display. This is accomplished by generating a horizontal correction signal that does not have any discontinuities. Since there are no discont... | 01/30/2007 |
| 7129655 | Image distortion correction apparatus capable of correcting misconvergence using an amplifier An image distortion correction apparatus is disclosed which can correct misconvergence using a D-class amplifier. The image distortion correction apparatus has an image processor for detecting an image signal and horizontal/vertical synchronous signals from a signal... | 10/31/2006 |
| 7082188 | Power source for regulated operation of the deflection coil of an x-ray tube A power source for the operation of a deflection coil for an electron beam of an x-ray tube has a voltage source and a bridge circuit that is connected with each end of the deflection coil, respectively via one power switch in series connection to opposite poles of ... | 07/25/2006 |
| 7046051 | Method and device for switching on and off power semiconductors, especially for the torque-variable operation of an asynchronous machine, for operating an ignition system for spark ignition engines, and switched-mode power supply A method and device for switching power semi-conductors on and off, especially for IGBTs and MOS-FETs with inductive loads, and how they would be employed with torque-variable asynchronous machines, in ignition systems for spark ignition engines, in switch mode powe... | 05/16/2006 |
| 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 |
| 6998798 | Digitally controlled vertical S linearity correction with constant amplitude without using an AGC A digitally-controlled vertical S linearity correction with a constant amplitude without using an AGC. To preserve line spacing between horizontal lines toward a top and bottom of a screen a third order correction voltage Vcube is applied to a sweep volta... | 02/14/2006 |
| 6996286 | Sweeping spatial filter system and method A method of providing a spatially filtered version of an image by selectively modifying image pixel amplitudes as a predetermined function of spatial frequency components of the image pixels includes dividing an overall frequency range of the image into a plurality ... | 02/07/2006 |
| 6980195 | Window brightness enhancement for LCD display An LCD monitor has an LCD panel for displaying a display video signal, and a lighting unit for illuminating the LCD panel. A personal computer, for example, supplies an input video signal and a control signal indicating that the brightness of a portion of the displa... | 12/27/2005 |
| 6897901 | Circuit for combining AKB and selective beam current limiting and projection television system utilizing same A control circuit for use in a video processor utilizes combined automatic kinescope bias (AKB) control, and average individual beam current sensing and limiting in at least one CRT. The control circuit includes automatic kinescope bias (AKB) control circuitry for d... | 05/24/2005 |
| 6853157 | Image distortion compensating apparatus with low switching delay An image distortion compensating apparatus controls a convergence yoke, and includes a compensation value generator for calculating a convergence compensation value for compensating a convergence distortion which occurs while an image signal is emitted onto a displa... | 02/08/2005 |
| 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 |
| 6545717 | Display system having selectable automatic CRT cutoff stabilization or AKB with CRT feedback current simulation A display system (10) which includes a CRT feedback current simulating circuit (20) to simulate the cathode feedback current directly from the from the red, green and blue output biases of the video processor (13). Furthermore, the display system (10) app... | 04/08/2003 |
| 6538398 | Cathode ray tube driver circuit with cathode current detection A circuit for driving a cathode ray tube (CRT) with cathode current detection. Specifically, the present invention discloses a CRT driver circuit comprising a push-pull configuration comprising upper and lower stages of darlington paired transistors. In t... | 03/25/2003 |
| 6462488 | Shadowmaskless tracking cathode ray tube control circuit having inverse beam current compensation A shadowmaskless tracking cathode ray tube control circuit is described, comprising a control loop, which is coupled to a deflection unit of a shadowmaskless tracking cathode ray tube. The shadowmaskless tracking cathode ray tube control circuit further c... | 10/08/2002 |
| 6452347 | Method and apparatus for deflection A primary winding of a transformer is serially connected to a horizontal deflection coil. An amplitude regulating circuit outputs a first correction voltage in response to a voltage generated on a secondary winding of the transformer. A phase regulating c... | 09/17/2002 |
| 6417633 | Tracking cathode ray tube circuit having a modulator demodulator A tracking index cathode ray tube circuit includes a tracking circuit connected to a shadowmaskless tracking cathode ray tube for deriving a tracking signal therefrom. The tracking circuit comprises a modulator demodulator circuit. The tracking signal fro... | 07/09/2002 |
| 6384547 | Line deflection circuit An electronic circuit for switching an inductive load (10) by way of a bipolar transistor (1) whereby a switching signal is supplied to the base (5) of a switching transistor (1) via an LRC circuit (6, 7, 9). During switching off the LRC circuit (6, 7, 9)... | 05/07/2002 |
| 6366036 | Arrangement for coupling out an output current from a load current and for gaining a control value to control the load current In an arrangement for coupling out an output current from a load current by a load (2), particularly a deflection coil of a cathode ray tube by means of an output resistor (4), which arrangement comprises an output current mirror (9, 10, 11), in which a c... | 04/02/2002 |
| 6366035 | CRT display apparatus A CRT display apparatus is disclosed. The CRT display apparatus includes a CRT having an electron gun whose electrodes for controlling an electron beam are applied with voltages from their respective voltage sources specifically designed to supply an elec... | 04/02/2002 |
| 6337545 | Apparatus and method for generating voltage for driving cathrode ray tube A CRT driving voltage generating apparatus which can be realized and integrated at low cost, and can prevent breakdown and malfunction of circuits by actively adapting to a change in the frequency of a horizontal synchronous signal, and a CRT driving volt... | 01/08/2002 |
| 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 |
| 6297601 | Apparatus and method for saving electric power in a display system The present invention relates to an apparatus and a method for saving electric power in a display system in which, when the display system is turned to an off mode, a total electric power consumption is reduced to a range for the display system to be oper... | 10/02/2001 |
| 6259217 | Wide band horizontal size regulation circuit of a display A wide band horizontal size regulation circuit of a display, is selectively switched according to input frequency, to control the amount of current transmitted to a current sensing port of a PWM IC. This circuit includes a microcomputer for generating a s... | 07/10/2001 |
| 6239561 | Signal processing for scanning beam velocity modulation An apparatus for image enhancement in a cathode ray tube display comprises an amplifier for a scanning velocity modulating signal. The scanning velocity modulating signal has an AC component and a DC value. A feedback circuit is responsive to power dissip... | 05/29/2001 |
| 6204882 | γ matching of a video processor by means of three measured currents Recent circuit concepts inject measurement lines, for cutoff and drive control of the cathode current, into each color channel during the vertical frame blanking period. Owing to the physically dependent exponential beam current characteristic profile as ... | 03/20/2001 |
| 6184627 | Image display An image display device has a plurality of electrodes that control a beam between a group of linear cathodes (2) and a screen (8) with a phosphor layer, and is provided with a circuit (31) for generating a beam track offset signal, which generates a signa... | 02/06/2001 |
| 6160364 | Circuit for limiting horizontal image size of display A circuit fixedly limits the horizontal image size of a screen of a CRT display. The circuit for limiting the horizontal image size of the screen detects a voltage indicative of the horizontal image size of the screen with power provided to a horizontal o... | 12/12/2000 |
| 6060845 | Raster distortion correction and deflection circuit arrangement A raster distortion correction and deflection circuit arrangement includes a deflection coil adapted to be mounted on a cathode ray tube, a horizontal deflection coil driving circuit for passing a current of saw-tooth waveform of a horizontal deflection p... | 05/09/2000 |
| 6020694 | Horizontal size regulation circuit of display device A horizontal size regulation circuit of a horizontal deflection circuit of a display device maintains a constant horizontal size despite transformer manufacturing tolerances, by using a horizontal flyback output value fed back from a choke coil of a horiz... | 02/01/2000 |
| 6005789 | Circuit for inhibiting transition phenomenon in power supply unit A circuit for inhibiting a transition phenomenon in a power supply unit is disclosed. When the power supply mode is shifted, a transition phenomenon is made not to appear in the operating power supplied to the load. The circuit includes a microcomputer wh... | 12/21/1999 |
| 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 |
| 5998943 | External magnetic field correction device and CRT display device An external magnetic field correction device capable of preventing malfunctions of the external magnetic field correction device due to operation of a degaussing circuit by judging that an abnormality has occurred when an output of an external magnetic fi... | 12/07/1999 |
| 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 |
| 5962993 | Horizontal S-shape correction circuit The turn-off period of the FET (111) is adjusted by changing the output pulse width of the MM (113) according to the horizontal deflection frequency, to adjust the total capacitance value of the S-shape correcting capacitor group in one horizontal deflect... | 10/05/1999 |
| 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 |
| 5920339 | Spot killer circuit for a cathode ray tube A spot killer circuit for a CRT is capable of thoroughly removing any spot persistence and prevents damage to the fluorescent body of the CRT due to inaccurate horizontal and vertical deflection. When the power cord is unplugged, or when the display devic... | 07/06/1999 |
