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| Number | Title | Issue Date |
| 7372653 | Degauss waveform generator for perpendicular recording write head Embodiments of the invention provide a hard disk drive that is capable of performing degaussing promptly and properly and a recording method for use with such a hard disk drive. A hard disk drive according to one embodiment of the present invention comprises a curre... | 05/13/2008 |
| 7164569 | Mechanism for automated permanent magnet degaussing A bulk degaussing system for the erasure of magnetic storage media by means of permanent magnets. The bulk degaussing system includes a rotatably mounted carousel and an angular displacement means that angularly displaces the carousel through a predetermined angle a... | 01/16/2007 |
| 7145761 | Degaussing coil holder To provide a degaussing coil holder for fastening a degaussing coil around a cathode ray tube which is easy in use and capable of stretching and fastening the degaussing coil in position, the degaussing coil holder is made of a resin mold having a hook to hang the d... | 12/05/2006 |
| 7120003 | Circuit arrangement with power factor correction, as well as a corresponding appliance The circuit arrangement has a mains connection, a mains switch with two switching contacts, a demagnetization coil and a switch-mode power supply, which contains a driver circuit for producing a control voltage for the switching transistor of the switch-mode power s... | 10/10/2006 |
| 7106536 | Write head demagnetizer A demagnetizer for an inductive load having a driver circuit including at least one transistor and a ramp-down voltage source switchably connected to the driver circuit, so that when the ramp-down voltage source is connected to the transistor, it drives the voltage ... | 09/12/2006 |
| 7085159 | Highly compact non-volatile memory and method therefor with internal serial buses A non-volatile memory device capable of reading and writing a large number of memory cells with multiple read/write circuits in parallel has an architecture that reduces redundancy in the multiple read/write circuits to a minimum. The multiple read/write circuits ar... | 08/01/2006 |
| 6914384 | Degaussing circuit for CRT monitor A degaussing circuit for compulsorily degaussing a picture tube of a CRT monitor by causing alternating current to flow through a degaussing coil. A switching part, connected to a first end of the degaussing coil, switches a current flowing into the degaussing coil ... | 07/05/2005 |
| 6671007 | Method and apparatus for mounting a degaussing coil A degaussing coil is retained on the conical portion of a cathode ray tube by a resilient clip which snaps over a lug which is used to mount the cathode ray tube in its associated cabinet. The clip can be snapped over its respective mounting lug after the... | 12/30/2003 |
| 6635994 | Method and apparatus for demagnetizing color CRT By passing electric current through a degaussing coil within a vertical retrace period, a displayed image is prevented from disturbance and yet color blurs on the way of degaussing process are made indiscernible. In the process of discharging charges fill... | 10/21/2003 |
| 6625012 | Degaussing coil fixing holder for a monitor A degaussing coil fixing holder. One degaussing coil fixing holder formed horizontally which comprises a horizontal bar including a guide groove and receiving a degaussing coil, at least one protruding part protruded backwards from the horizontal bar and ... | 09/23/2003 |
| 6556412 | Degaussing apparatus and method for rotatable video display apparatus A sequential driving type degaussing circuit includes a rotation direction and angle detector for generating each pulse by using a pair of photo sensors and slits to detect a rotation angle and a rotation direction of a television set when it is rotated m... | 04/29/2003 |
| 6091198 | Demagnetization circuit for cathode-ray tube video device A cathode-ray tube video device connected to a power source and having a first normal operating state and at least a second operating state at reduced power (stand-by mode) includes a switching power supply and a circuit portion for demagnetizing the cath... | 07/18/2000 |
| 6055026 | Apparatus for holding degauss coil An apparatus for attaching a degauss coil to a cathode-ray tube can simplify a manufacturing process by reducing the number of assemblies for attaching a degauss coil stretched over a curved surface of a funnel of a cathode-ray tube. This apparatus includ... | 04/25/2000 |
| 5990623 | Method for controlling degaussing coil of cathode ray tube A degaussing coil is driven when a driving request for the degaussing coil is received after turning on of a main power supply of a cathode ray tube and a driving request for the degaussing coil is set when the driving time of the degaussing coil is less ... | 11/23/1999 |
| 5962978 | Apparatus for automatically degaussing a color picture tube in response to a power conservation mode An automatic degaussing circuit for a color picture tube (CPT) capable of automatically degaussing the CPT when a power conservation mode is released in a monitor having a power conservation function. The degaussing circuit includes a degaussing coil for ... | 10/05/1999 |
| 5952786 | Auto deguassing from stand-by to on Circuitry to control a power supply of a degaussing coil of a cathode ray tube, said degaussing coil is coupled to a main voltage supply through a switching device the circuitry has inputs coupled to a direct source of current of a switched mode power sup... | 09/14/1999 |
| 5953081 | Complementing circuit for tilt of picture in a display device A picture tilt complementing circuit in a display device includes: a microcomputer for receiving horizontal and vertical sync signals from a computer and generating a tilt control signal; a horizontal sawtooth wave generation unit for converting the tilt ... | 09/14/1999 |
| 5940261 | Circuit and method independent of frequency and voltage deviations of supply voltage, and display apparatus incorporating same circuit A degaussing circuit includes an AC mains voltage, a series arrangement of a degaussing coil (Ld) and a switching element (S1) coupled between the input terminals (it1,it2). A measuring circuit (3) continuously measures a value (Ms) representing an actual... | 08/17/1999 |
| 5923520 | Demagnetizing circuit and current limiting device A demagnetizing circuit and a current limiting device for being built into a power supply circuit of a color television receiver or color monitor display or the like with which it is possible to effect a reliable demagnetizing operation using existing com... | 07/13/1999 |
| 5901029 | Method of degaussing a color cathode ray tube In a method of testing a color cathode ray tube, an electron gun assembly is energized to emit electron beams and only a horizontal deflection magnetic field is applied to the electron beams so that a line image is displayed on a screen. A degaussing coil... | 05/04/1999 |
| 5831508 | Component for a demagnetization circuit A component for a demagnetization circuit includes a thermistor with positive temperature characteristic having a first electrode and a second electrode, another thermistor with negative temperature characteristic having a third electrode and a fourth ele... | 11/03/1998 |
| 5828279 | Degaussing coil holder for cathode ray tube A holder for supporting a degaussing coil on a cathode ray tube. The degaussing coil holder is a flexible sheet having holes formed in each end to receive a lug of the cathode ray tube.... | 10/27/1998 |
| 5825131 | Tilt compensation circuit for picture tubes A tilt compensation circuit for a picture tube is provided to correct an image rotation phenomenon of a currently displayed image on a screen caused by an outer interference such as terrestrial magnetism. In the picture tube, an alternating current for dr... | 10/20/1998 |
| 5815361 | Magnetic field shielding device in display A magnetic field shielding device of a CRT (cathode ray tube) display includes a degaussing coil for preventing a magnetic field, generated by a voltage supplied to a deflection coil of the display, from being emitted from the display. A tilt coil maybe d... | 09/29/1998 |
| 5751112 | CRT magnetic compensating circuit with parallel amorphous wires in the sensor A magnetic compensating circuit includes a magnetic sensor (1), a control circuit (2) for generating a signal for magnetic compensation, and coils (3) for magnetic compensation. The magnetic sensor has a pair of amorphous magnetic substance wires (101) ar... | 05/12/1998 |
| 5745191 | Switching degaussing circuit for television set An improved degaussing circuit for a television set capable of preventing color blurring phenomenon and picture quality deterioration by degaussing television set of which its picture quality is affected by an external magnetic field at the time of turnin... | 04/28/1998 |
| 5742128 | Apparatus for mitigating the effects of ambient magnetic fields on the operation of a CRT Apparatus for mitigating the adverse effects of magnetic interference on the operation of a CRT is provided. More specifically, magnetic sensors are placed in a gap formed between a front bezel and a rear enclosure comprising a magnetic shield enclosing a... | 04/21/1998 |
| 5742127 | Degaussing system for cathode ray tube which prevents display of visual distortion A system for degaussing a cathode ray tube (CRT) which avoids displaying a distorted picture to the user when a magnetic field is degaussed while the CRT is on. The system of the present invention recognizes when a user has pressed a button to initiate th... | 04/21/1998 |
| 5739638 | Bus controlled arrangement using a duty cycle modulated control signal in a CRT A bus controlled pulse modulator receives a digitally coded signal and generates a pulse-width modulated signal. The pulse-width modulated signal is coupled to a base electrode of a non-committed or open collector transistor. The transistor switches with ... | 04/14/1998 |
| 5736914 | Demagnetizing device for a cathode ray tube A demagnetizing device for a cathode ray tube having a screen portion and a funnel portion, comprising: an outer magnetic shielding member which is arranged so as to surround a funnel portion of a cathode ray tube, and which is formed of a magnetic sheet;... | 04/07/1998 |
| 5729092 | CRT focus mask degaussing arrangement responsive to a breakdown event A cathode ray tube may utilize a focus mask color-selection structure. The focus mask structure is susceptible to localized, transient short circuit events, or breakdown events. These events may be caused by conductive particulates that become free within... | 03/17/1998 |
| 5715130 | Demagnetization circuit and components therefor A demagnetization circuit controls a demagnetization current to its demagnetization coil by means of a PTC thermistor with positive characteristic. The PTC thermistor is connected in series with and thermally coupled to a heat-sensitive switch. An NTC the... | 02/03/1998 |
| 5696565 | Demagnetizing device is automatically energized after counting a set number of power-on operations of a cathode ray tube A CPU is designed so as to put a demagnetizing circuit in an operative state in accordance with a result of detecting, among other quantities or events, the number of operations to turn on a power counted by a counter, the lapse of time under a predetermi... | 12/09/1997 |
| 5696427 | Adjustable retainer for degaussing coil The strip-type retainer device for fitting a degaussing coil of a cathode ray tube in a display device is provided. The retainer device comprises a first end section, a contact section, a middle section and a second end section. The contact section has a ... | 12/09/1997 |
| 5675219 | Degaussing circuit for wide-range ac An automatic degaussing circuit provides a video display apparatus with a degaussing capability over a wide range of ac mains sources. An ac mains source is coupled to a degaussing coil by a series interconnection of first and second temperature-sensitive... | 10/07/1997 |
| 5672940 | Television power supply with polarity-independent charging paths A television receiver has a switched mode power supply controller, which may be deflection synchronized, which produces pulses in a power transformer. To power the controller during startup, before the internal power supply has started, a storage capacito... | 09/30/1997 |
| 5642175 | Color cathode ray tube display device and method of eliminating the influence of an external magnetic field A color cathode ray tube display device comprises a color cathode ray tube including a neck portion (1a), a funnel portion (1b), and a panel portion (1c), a compensating coil (7) which generates a compensating magnetic field for eliminating the influence ... | 06/24/1997 |
| 5594615 | Method and apparatus for reducing the intensity of magenetic field emissions from display device Method and apparatus for the reduction of the intensity of magnetic field emissions from display devices and other magnetic field emitters comprising an active magnetic field bucking system and a passive magnetic shield, for use either singularly or in co... | 01/14/1997 |
| 5559401 | Color display device comprising a color display tube and a delaying demagnetizing device Color display tube with a shadow mask, a shield of a ferromagnetic material and a demagnetizing device having a set of demagnetizing coils. The demagnetizing device is provided with means for energizing the demagnetizing coils in two steps which are shift... | 09/24/1996 |
| 5541805 | Time delay control switch for vertical deflection in television receiver In a television receiver, to prevent interference between the magnetic field used for degaussing and the magnetic field of the vertical yoke, a switch is used for delaying turning on the vertical deflection circuit during degaussing.... | 07/30/1996 |
