Quotables
"Inventing is a combination of brains and materials. The more brains you use, the less material you need."
Charles Kettering
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| 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 |
| 7102302 | Waveform generator for controlling an electron beam in a cathode ray tube A parabola generator for providing dynamic correction includes a capacitor source of a parabolic input signal at a frequency related to a horizontal deflection frequency coupled to a first terminal of the capacitor. A diode switch is coupled to a voltage at a refere... | 09/05/2006 |
| 7061192 | Switching-type vertical deflection output circuit A switching-type vertical deflection output circuit comprises: an output-stage circuit constituted of first and second diodes and first and second switching elements, a smoothing circuit, a vertical deflection coil, a reference vertical sawtooth voltage generation u... | 06/13/2006 |
| 7061552 | Method and apparatus to perform automatic digital convergence A method and apparatus for performing autoconvergence is described. An image having a first aspect ratio and a plurality of sides is received. The image is displayed on a display having a second aspect ratio and at least one sensor corresponding to each side of the ... | 06/13/2006 |
| 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 |
| 6972807 | Projection television and convergence control method thereof A projection television and a convergence control method thereof are provided. The projection television, which magnifies images displayed on cathode ray tubes (CRTs) for the colors red, green, and blue using lenses and projects the magnified images onto a screen, i... | 12/06/2005 |
| 6952242 | Convergence correction of a CRT screen or projector A control signal for controlling a correction circuit for at least one electron beam that scans a screen line by line, the amplitude of which varies along each line according to a curve of a first type determined by line parameters, each of the line parameters varyi... | 10/04/2005 |
| 6917168 | Cathode ray tube device and a television set using the same Sensitivity of a velocity modulation device is increased and noise such as a leakage magnetic field and a leakage electric field from the device are reduced to thereby lower power consumed by the device. A cathode ray tube device and a television set each include a ... | 07/12/2005 |
| 6798155 | Color image display device A color image display device has an auxiliary means for compensating brightness simply and inexpensively by using an electron gun of a cathode ray tube. Brightness uniformity is improved in the image display device having a flat-type color cathode ray tube with a gl... | 09/28/2004 |
| 6504324 | Color-cathode-ray-tube electron gun and color cathode-ray tube A color-cathode-ray-tube electron gun of the present invention comprises a three-divided first focus electrode and a second focus electrode set so as to oppose the first focus electrode: wherein a parabolic-waveform voltage synchronizing with horizontal s... | 01/07/2003 |
| 6489735 | Generating a non-linear waveform In a waveform generator, a repetitive non-linear waveform is generated by varying the number supplied to a pulse reduction circuit during the repetition period. Consequently, the pulse reduction circuit supplies a number of desired output pulses, which nu... | 12/03/2002 |
| 6452346 | Color display device with deflection means and a co-operating pair of means for influencing the distance between electron beams A color cathode ray tube has quadrupole elements which increase and decrease the distance between the electron beams as a function of the deflection. Two co-operating elements have their windings connected in series with each other to minimize dissipation... | 09/17/2002 |
| 6445145 | Display device A display device capable of removing a defocused beam spot on the focusing screen by obtaining the fluctuation of a focusing voltage following the fluctuation of a high-tension voltage. There is applied a DC voltage of a predetermined high-tension voltage... | 09/03/2002 |
| 6437522 | Method for controlling digital dynamic convergence and system thereof The invention and method enable the astigmatism correction at each crossing point of a cross hatch pattern, thereby making high-resolution display possible. An appropriate voltage or current for controlling the magnetic field adjusting coils are generated... | 08/20/2002 |
| 6404147 | Display apparatus monitoring a threshold level for controlling a dynamic focusing circuit A display apparatus including a CRT provided with an electron gun having a focusing electrode which is applied with a dynamic focusing voltage for focusing electrons drawn from a cathode of the CRT is disclosed. The display apparatus includes a dynamic fo... | 06/11/2002 |
| 6380988 | Focus compensation apparatus and method for monitor system A focus compensation apparatus and method for a monitor system are provided. The focus compensation apparatus includes a parabolic signal generation circuit for generating a parabolic signal in synchronization with a horizontal flyback pulse, the waveform... | 04/30/2002 |
| 6362579 | Circuit for correction of deflection errors in a television display A circuit for correction of deflection errors in a television set, in which a correction current having alternate forward-sweep and flyback periods is supplied to a correction coil for an error parameter. An amplitude of the correction current is reduced ... | 03/26/2002 |
| 6351086 | Display correction waveform generator for multiple scanning A method for generating display correction waveforms for a CRT display comprises the steps of selecting one of a plurality of trace portions for forming part of a correction waveform, the trace portions having different average values. Completing each of ... | 02/26/2002 |
| 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 |
| 6215258 | Dynamic focus circuit suitable for use in a wide-angled cathode ray tube A dynamic focus circuit enables ideal focusing characteristics to be obtained across the entire screen of a wide-angled cathode ray tube, by generating a dynamic focus voltage having a flat-bottomed waveform through the addition of a simple circuit to a c... | 04/10/2001 |
| 6215259 | Apparatus for compensating for corner focus and brightness in cathode ray tube An apparatus for compensating for corner focus and brightness in a CRT improves compensation efficiency for corner focus and brightness regardless of the dimensions of the CRT and minimizes the manufacturing cost and power consumption. The apparatus for c... | 04/10/2001 |
| 6023133 | Parabolic signal generator A parabolic signal generator (100) for use in a cathode ray tube (CRT) display circuit, comprising: programmable delay means (110) for receiving a CRT horizontal flyback signal and for producing a trigger signal which is delayed relative to the horizontal... | 02/08/2000 |
| 6002454 | Distortion correction circuit After analog-to-digital conversion, a luminance signal 103 and a chrominance signal 109 are stored in a line memory circuit 128. Such stored signals are read out of said line memory circuit, using a read clock 124 obtained by parabolically modulating a re... | 12/14/1999 |
| 5939843 | Adaptive convergence adjustment for multi-scan monitor The present invention relates to a multi-frequency display system and method for providing color convergence. The system comprises a convergence circuit that is configured to receive a first set and a second set of color input signals. The first of color ... | 08/17/1999 |
| 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 |
| 5923387 | Picture display apparatus and method of generating a focusing voltage A focusing waveform (Vf) is obtained by first generating (2) two intersecting triangular waveforms of opposite phase and half the deflection frequency. Subsequently, the difference between these two triangular waveforms is multiplied by itself for generat... | 07/13/1999 |
| 5914567 | CRT display apparatus, field radiation restriction circuit and field radiation restriction electrode A display apparatus including a CRT having a deflection yoke, a plurality of field radiation restriction electrodes and a field radiation restriction circuit including an amplitude adjuster for applying, to at least one of the field radiation restriction ... | 06/22/1999 |
| 5747948 | Convergence correction A correction circuit for a cathode ray tube displaying images subject to distortions comprises: a multiplier for a first horizontal sine waveform and a vertical parabola waveform to define a correction signal, the vertical parabola having a zero value dur... | 05/05/1998 |
| 5644196 | Beam landing location error correction arrangement A differentiation network differentiates a retrace pulse signal to produce a narrower pulse during the first half of retrace that is coupled to an input of a convergence amplifier. The convergence amplifier is coupled to a convergence winding to produce a... | 07/01/1997 |
| 5596248 | Convergence correcting device A convergence correcting device in a CRT display apparatus is free from any necessity of adjustment of a convergence correction rate even if a raster size is changed. The convergence correcting device generates a modified blanking pulse having a pulse wid... | 01/21/1997 |
| 5576774 | Convergence adjusting apparatus capable of independently performing convergence adjustment on one adjustment point without affecting the convergence of the remaining adjustment points In a convergence adjusting apparatus, there are generated waveform signals for adjustment, each level of which becomes zero at a plurality of adjustment points on a display except for one adjustment point. The levels of the waveform signals for adjustment... | 11/19/1996 |
| 5523657 | Convergence correction apparatus for picture image display device A convergence correction apparatus for a picture image display device including a picture tube provided with an anode and a convergence coil, for displaying a picture image, a receiver for receiving a composite video signal, a separator for separating a h... | 06/04/1996 |
| 5521646 | Geometry and convergence correction for projection television apparatus A projection television apparatus has three monochromatic picture tubes disposed in a planar orientation defining a central picture tube and two outer picture tubes. Each of the picture tubes includes a deflection unit responsive to deflection currents an... | 05/28/1996 |
| 5508593 | Differential error convergence correction A convergence correction circuit, for a cathode ray tube projecting images having keystone, differential sine and differential left edge curl distortions, comprises generators for horizontal rate sine, horizontal rate sawtooth and horizontal rate pulse wa... | 04/16/1996 |
| 5483300 | Output circuit A convergence output circuit for converging signals corresponding to the primary colors of an input video signal which reduces power loss by including a positive power source voltage supply circuit for supplying a first voltage to a first current supply c... | 01/09/1996 |
| 5473224 | Convergence correction apparatus A convergence correction apparatus comprises: a scanning waveform generating section (6) for generating a scanning waveform in synchronization with a sync signal for scanning an electron beam in a cathode ray tube (8); an amplitude control section (7) for... | 12/05/1995 |
| 5461431 | Display apparatus for television for displaying an image of different size on a whole display screen A display apparatus for a television having a screen of an aspect ratio different from that of an original image, wherein an image is distorted in at least one of the vertical and horizontal directions such that an expansion ratio or a reduction ratio gra... | 10/24/1995 |
| 5444500 | Display device including a correction circuit, and correction circuit for use in a display device To improve the sharpness of (video) pictures to be displayed on a display screen of a display device, it is known to use scan velocity modulation. The drawback of scan velocity modulation is that an improvement of the (impression of) sharpness is obtained... | 08/22/1995 |
| 5396156 | Convergence correction circuit for cathode ray tube A dynamic convergence apparatus of a simplified arrangement can reduce a distortion of a beam spot on a periphery of a picture screen and improve a focusing, wherein a parallel circuit of a high resistance value resistor (R) and a diode (D) is connected b... | 03/07/1995 |
| 5298985 | Image correction apparatus for adjusting images by digitially controlling analog correction waveforms An image correction apparatus uses digital correction data from a memory device, in which various correction data is stored, and various analog correction waveforms for implementing, through digital control, various correction, such as convergence, deflec... | 03/29/1994 |
