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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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4091312 |
Cathode ray display intensity modulator
Today's cathode ray tube oscilloscopes are widely used throughout the world and form an important basic tool in many industries. An apparatus to modulate the cathode ray display intensity, thereby...
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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...
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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...
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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...
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T954007 |
Signal enhancement system for radar display
a system is provided for matching the dynamic range of a radar signal to the dynamic range of the CRT on which it is displayed. A variable gain amplifier 10 receives the radar video signal which it...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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3927346 |
System for stabilization of working point in picture tubes
Minor deviations in color temperature, which occur because of changes in the power supplied to video amplifiers which supply the video signal to a color picture tube, are corrected by adjusting the...
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3925706 |
Field emission electron gun device of the automatic control type
A field emission electron gun device wherein the quantity of electrons in the electron beam is automatically controlled by means of a control electrode disposed adjacent the cathode. The control...
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3921029 |
Color image displaying device
A color image displaying picture tube having no fluorescent dots or stripes on the face plate. The electron beam in the tube is light modulated with a light wave and demodulated on the face plate...
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3917974 |
Scintillation camera brightness calibrating apparatus
Circuitry is disclosed for calibrating the brightness level of the cathode ray tube associated with a scintillation camera. The apparatus disclosed includes circuitry for generating a raster over a...
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3911317 |
Current bootstrap to reduce interelectrode capacitance effect in a vacuum tube
A drive circuit using a current drive for the cathode of a cathode ray tube has a constant voltage, circuit node between the video signal source and the cathode of the tube. That node is coupled by...
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3889244 |
Graphic data display system with multiple display inhibit delay times
A graphic data display system for effecting controlled traces on the screen of a cathode ray tube in which data display is inhibited for various delay times in response to detection of changes in...
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3887834 |
Cathode-ray tube having an electric cylinder lens for the dynamic correction of electrostatic deflection defocusing
A cathode-ray tube provided with an electric cylinder lens for the dynamic correction of electrostatic deflection defocusing. The lens is formed of two electrodes having slot-like apertures that...
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3864596 |
MULTIPLE ELECTRON MIRROR APPARATUS
An electron beam system using an electron beam source, a magnetic prism and a plurality of electron mirrors with associated electron beam focusing or cross-section control lenses and beam...
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3855497 |
DUAL BIAS CONTROLLED STORAGE TUBES
In response to the application of a predetermined signal, the bias on the control grid of a storage tube is altered to switch its electron scanning beam from a substantially unblanked condition to...
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3854071 |
EXPOSURE REGULATED SCANNING ILLUMINATION MEANS FOR ELECTRON PROJECTION SYSTEMS
The present invention relates to circuit means for use in combination with an electron beam projection system of the type wherein an image is projected onto a wafer by means of a scanning electron...
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3852637 |
ELECTRON GUN STRUCTURE WITH UNIPOTENTIAL AND BIPOTENTIAL LENS
An electron gun structure having a main focusing lens including a unipotential electron lens and a bipotential electron lens, the unipotential and bipotential electron lenses serving as a single...
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3851206 |
GAIN CONTROLLABLE IMAGE INTENSIFICATION SYSTEM
A system which utilizes a plurality of cascaded image intensifier tubes selectively coupled to a power supply to intensify the image of a scene. The power supply is adaptable for supplying the same...
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3848945 |
BRIGHTNESS LIMITING CIRCUIT
A brightness limiting circuit for a television receiver reduces anode current in a CRT to prevent damage to the horizontal output stage by controlling the biasing of a transistor in series between...
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3842312 |
METHOD OF MODULATING A BEAM OF ELECTROMAGNETIC RADIATION
Image intelligence signals transmitted through a transmission path having a particular transfer characteristic for processing and subsequent display are converted to a pulse width modulated signal....
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3836795 |
PARALLEL MULTIPLE CHANNEL DISPLAY SYSTEM
Visual signal information from multiple electronic signal channels are displayed simultaneously on the screen of a cathode ray tube by impressing each signal channel on the input of an individual...
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3831056 |
BEAM CURRENT STABILIZATION AND BLANKING APPARATUS
That portion of the beam current of a television pick-up tube which is collected by its limiting aperture grid is sensed to provide a feedback voltage for the control grid to stabilize against beam...
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3831057 |
CIRCUIT ARRANGEMENT FOR GENERATING A BEAM CURRENT IN A CATHODE-RAY TUBE
A circuit arrangement in a cathode-ray tube for producing a cathode-ray beam current which is proportional to the deflection speed of the beam. The cathode-ray tube includes a cathode and a control...
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3795836 |
INTENSITY LIMITING MEANS FOR CATHODE RAY OSCILLOSCOPE
Display apparatus including a cathode ray oscilloscope is provided, primarily but not exclusively for thermography, to obtain photographic records of the oscilloscope image without danger of...
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3794878 |
ELECTRON BEAM REGULATOR
A resistor connected between the filament and a filament can of an electron beam device also is connected to an auxiliary operational amplifier that establishes and controls an auxiliary current...
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3786305 |
FIELD EMISSION ELECTRON GUN
In an electron gun device of the field emission type having a cathode tip, and first and second anodes connected to responsive voltage sources, a control electrode connected to a control voltage...
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3783333 |
X-RAY TUBE WITH IMPROVED CONTROL ELECTRODE ARRANGEMENT
Electron emissive device such as an x-ray tube having a cathode for generating electrons and an anode for receiving the same is provided with an auxiliary electrode insulated from the focusing cup...
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3783334 |
CATHODE RAY TUBE DISPLAY SYSTEMS
A display system, having particular application in gamma cameras, in which items of information are represented by bright spots on the screen of a cathode ray tube. The display is basically in the...
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3783335 |
INSTANT-ON CIRCUIT FOR A TELEVISION RECEIVER OFFERING INDEPENDENT FILAMENT VOLTAGE CONTROL
The instant-on circuit cooperates with a horizontal deflection system of the type utilizing two bidirectionally conductive switching means which serve respectively as trace and commutating...
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3781591 |
SYSTEM FOR CONTROLLING THE TARGET VOLTAGE OF IMAGE SENSORS
Herein is disclosed a system for automatically controlling the target voltage applied to the photoconductor of a television camera so as to provide improved performance over a wide range of...
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3780339 |
HIGH SPEED SWITCHING CIRCUIT FOR DRIVING A CAPACITIVE LOAD
A high speed switching circuit especially useful for driving a capacitive load includes two dc voltage sources of equal magnitude which are selectively coupled to a capacitive load such as a...
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3778668 |
AUTOMATIC BEAM CURRENT LIMITER
A circuit for limiting the beam current in a cathode ray tube or the current in the horizontal output tube comprising means for detecting changes in the average value of the cathode current of the...
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3775637 |
CATHODE RAY DISPLAY INTENSITY CONTROL CIRCUIT
An intensity control circuit is utilized in conjunction with a cathode ray tube (CRT) display wherein the grid-to-cathode drive to the CRT is automatically adjusted to compensate for changes in...
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3766428 |
HIGH RESOLUTION, HIGH INTENSITY CATHODE RAY TUBE
This invention relates to a radiation display tube having an increased image resolution and recording efficiency and comprising a first evacuated chambers, a second chamber having a radiation...
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3757156 |
VIDEO SIGNAL BRIGHTNESS CONTROL CIRCUIT ARRANGEMENT
A circuit arrangement for processing a sequence of video signals containing useful and interfering components, particularly received ranging signals, for display on a cathode-ray tube. The received...
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