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| Number | Title | Issue Date |
| 7369082 | Method and apparatus implementing a scan strategy for automatic high power tube recovery A method of reducing power to an electron emitting cathode comprises the steps of sensing a weather condition; calculating a condition number based upon the weather condition; comparing the condition number to a threshold; and reducing the power to the electron emit... | 05/06/2008 |
| 7342817 | System and method for writing data using an electron beam A system for writing data using an electron beam to change the structure of a small section of a storage medium and includes at least one focused electron beam source. The duration of a write cycle of the focused electron beam source is controlled at least in part o... | 03/11/2008 |
| 7028529 | Apparatus and methods for testing acoustic probes and systems Methods and apparatus are provided for testing an acoustic device that has multiple transducing elements adapted for conversion between acoustic and electrical signals. An electrical transmission signal is generated. The electrical transmission signal is transmitted... | 04/18/2006 |
| 6975288 | Method of driving image-forming apparatus and apparatus thereof Disclosed is an electron-emitting device, an electron source, and an image-forming apparatus that have uniform electron-emitting characteristics, emit electron beams whose diameters are small, have simple constructions, and are easy to be manufactured. The electron-... | 12/13/2005 |
| 6495978 | CRT display device and cutoff adjustment method A cutoff adjustment method of a CRT using a Hi-Gm tube is proposed as well as a problem that luminance of a display screen is changed by a fluctuation of a Gm voltage to be applied to a Gm electrode in relation to fluctuations of currents flowing into the... | 12/17/2002 |
| 6384536 | CRT display apparatus A CRT display apparatus including a CRT having an electron gun is disclosed. The electron gun includes a cathode, a G1 electrode, a G2 electrode, and a G3 electrode disposed in that order for drawing electrons from the cathode. The electron gun further in... | 05/07/2002 |
| 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 |
| 5977711 | Method and system for optimizing cathode output for aging a cathode ray tube during manufacture The present invention relates to a method and system for optimizing the output of at least two electron guns in a cathode ray tube for aging the cathode ray tube during manufacture. The system comprises at least two electron guns located in the cathode ra... | 11/02/1999 |
| 5371434 | Radiation-emitting devices having an array of active components in contact with a fluorescent layer A display or other radiation-emitting device has an array of vertical ballistic transistors which produce electrons that flow into overlying phosphor regions. Light produced by the phosphors is focussed by an array of convex lenses above the phosphor regi... | 12/06/1994 |
| 4742397 | System and method for adjusting image brightness in electronic printer A system and method for displaying an image for photographic reproduction operates to calibrate the brightness of the image display prior to each photographic reproduction in a manner that accounts for the variations in the brightness characteristics of t... | 05/03/1988 |
| 4230973 | DC Coupled, wide band width high voltage modulator Apparatus for controlling the intensity of a display on a cathode ray tube wherein the control signals are DC through several megahertz and a control loop maintains the average value of the control signal on the grid of a cathode ray tube relatively const... | 10/28/1980 |
| 4218720 | Television receiver picture tube protection circuit A protection circuit for television receiver picture tubes and related components which includes a diode which is forward biased during normal operation to provide coupling of the tube control grid to ground or reference potential and which is reverse bia... | 08/19/1980 |
| 4177409 | Video amplifier for displaying four or more video levels on a cathode ray tube A video amplifier for decoding a digital signal input and providing at least three video brightness levels plus a black level to a cathode ray tube is disclosed. The amplifier includes input logic decoding circuitry for providing control signals to a plur... | 12/04/1979 |
| 4167025 | Automatic peak beam current limiter In a video signal processing system, apparatus for limiting excessive peak and average beam currents demanded by a kinescope in response to image representative video signals. A control signal derived by a sensing circuit in response to excessive beam cur... | 09/04/1979 |
| 4077054 | System for modulating a flat panel image display device Electron beams in a cathodoluminescent display device are modulated utilizing a means for generating a voltage proportional to the instantaneous electrical charge on the cathodoluminescent screen and means for generating a periodic reference waveform havi... | 02/28/1978 |
| 4067048 | Automatic beam current limiter A beam current limiter for a kinescope of a television receiver includes a control transistor, sensing means for providing a control voltage representative of the magnitude of beam current and a clamping network coupled to the sensing means. When beam cur... | 01/03/1978 |
| 4051468 | Apparatus and method for modulating a flat panel display device A flat panel display device has a cathodoluminescent screen which is bombarded by a flow of electrons. The screen becomes electrically charged due to the electron bombardment. The charge striking various points on the screen is directly related to the ima... | 09/27/1977 |
| 4001503 | Temperature-rise preventive apparatus for television receiver parts Temperature-rise detecting device and average beam current restricting device operable in response to the former device are provided in television receiver set. Temperature in the television receiver may be kept below a predetermined temperature by reduci... | 01/04/1977 |
| 4000440 | Method and apparatus for controlling brightness and alignment of a beam of charged particles A beam of charged particles has its alignment and brightness alternately controlled in accordance with the current of the beam. The measurements of the current and any corrections for alignment or brightness are made when the beam is not applied to a targ... | 12/28/1976 |
| 3978470 | Multi-channel data color display apparatus A multi-channel display apparatus includes a computer having a random access memory means for storing of the continuous monitored data and for driving of a multiple-channel television unit, with each channel identified by a preselected unique color. Verti... | 08/31/1976 |
| 3967314 | Color brightness control A means is disclosed for selectively increasing the emission of the several color guns of a color picture tube by placing a variable resistance between the control grid and the screen grid corresponding to each said color gun. This provides a source for i... | 06/29/1976 |
| 3955120 | Circuit for digitally controlling the brightness of the electron beam of an electron beam deflection tube A circuit for digitally controlling the brightness of the electron beam of an electron beam deflection tube. The circuit permits switching at a very fast rate on the order of 200 nanoseconds. To this end, a differential amplifier is used having an input a... | 05/04/1976 |
| 3953764 | Method and means for selectively positioning a light source for illuminating film transparencies A light source for illuminating film transparencies is in the form of a cathode-ray tube provided with electronic circuitry which causes the beam of the tube to trace a raster on the screen. The circuitry is such that the area of the raster and its positi... | 04/27/1976 |
| 3944871 | Self-optimizing RF signal detection and panoramic display apparatus Apparatus for detecting any signal occurring within a wide bandwidth and playing it with a signal-to-noise performance substantially equal to that of a receiver of optimum bandwidth for that signal. The apparatus essentially comprises a special purpose c... | 03/16/1976 |
| 3934171 | Double grid electron gun system and method of use An electron gun for use in a cathode-ray tube is provided with two control grids between the cathode and an accelerating electrode. The control grids are both provided with separate control voltages bearing the same intensity-modulation information for co... | 01/20/1976 |
