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7462838 |
Electrostatic deflection control circuit and method of electronic beam measuring apparatus
An electrostatic deflection circuit and method of an electronic beam measuring apparatus which can achieve the high precision of the electronic beam measuring and contribute to the simplification...
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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...
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6703802 |
Saturation suppression of CRT output amplifiers
The invention provides a circuit for controlling a cathode ray tube. The circuit comprises a source of input color signals (U in (R), U in (G), U in (B)) for the primary colors of the cathode ray...
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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...
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6686710 |
Circuit and method for regulating current using autobias
A circuit for regulating a signal, such as a cathode current. The circuit has an input stage for inputting a signal and for producing a sense signal based thereon. The circuit may input timing...
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6674253 |
Scan velocity modulation technique
A video signal is split into a first signal and a second signal. The first signal includes low amplitude/high frequency components of the video signal, which can be properly amplified by a video...
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6614193 |
Deflection current modulation circuit
A horizontal deflection circuit generates a horizontal deflection current in a deflection winding, during a trace interval and during a retrace interval of a deflection cycle. A transistor is...
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6590353 |
Device for the control of a circuit for the vertical deflection of a spot scanning a screen
Disclosed is a device to control a circuit for the vertical deflection of a spot scanning a screen, and more particularly a control device whose output amplifier stage works in class D mode at the...
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6563276 |
CRT display apparatus
A CRT display apparatus capable of displaying images in high contrast and high brightness without causing noises and halftone-reproduction degradation within dark areas is disclosed. The apparatus...
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6545435 |
Cathode ray tube and signal detecting method in cathode ray tube
A capacitor for outputting a reference signal is formed by using a part of an envelope. A reference signal according to an anode voltage is output from the capacitor for outputting a reference...
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6512340 |
Temperature sensor with current mode output for thermal protection for a cathode ray tube (CRT) driver
One embodiment of the present invention includes a temperature sensor with current mode output utilized within a cathode ray tube (CRT)-based display system for providing thermal protection to a...
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6512339 |
CRT display device
In a CRT display device including a CRT (MM tube) having brightness higher than that in the background-art CRT, it is an object of the present invention to improve contrast and prevent conspicuous...
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6411048 |
Method and device for controlling a circuit for the vertical deflection of a spot scanning a screen, in particular for a television set or a computer monitor
The control device includes an output amplifier stage ETS supplied by a main supply for controlling the vertical scan of the spot, and an auxiliary supply capable of delivering an overvoltage and a...
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6369528 |
Vertical deflection circuit
A vertical linearity correction circuit including diodes and resistors is provided in a vertical deflection circuit, and a vertical deflection voltage applied to a vertical deflection yoke is...
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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...
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6326744 |
Dynamic focusing circuit of a monitor system
A dynamic focusing circuit of a monitor system capable of easily compensating a defocusing of a screen which often occurs in the monitor system which adopts a CRT. When vertical and horizontal...
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6313878 |
Method and structure for providing an automatic hardware-implemented screen-saver function to a display product
A hardware-implemented screen-saver prevents burn-in of an image displayed on a screen of a display product by automatically reducing the video gain, and therefore the contrast, of the image when...
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6313590 |
Compensation of vertical deflection
A vertical deflection amplifier drives a vertical deflection coil according to a ramp input signal and has a current sensing resistor providing a feedback signal. The vertical deflection coil is...
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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...
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6118233 |
Dynamic focus voltage disabling circuit
A video imaging apparatus includes a source of a periodic dynamic focus voltage blanking signal. A dynamic focus voltage amplifier includes a switch responsive to the dynamic focus voltage blanking...
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6091213 |
Horizontal deflection circuit for a monitor
A horizontal deflection circuit for a monitor is disclosed. The horizontal deflection circuit for a monitor includes a microprocessor for determining a mode of the monitor according to frequencies...
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6091212 |
Circuit for adjusting a horizontal center of a raster for a monitor
Disclosed is a circuit for adjusting a horizontal center of a raster displayed on a monitor CRT, which includes a current generating circuit which can control an amount of a direct current flowing...
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6087789 |
Hybrid bridge magnetic deflection amplifier
A magnetic deflection amplifier implemented using a linear amplifier connected to a first side of a deflection coil and a three pole switch connected to a second side of the deflection coil. The...
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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...
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5982115 |
Circuit arrangement for producing a vertical frequency deflection current
A non-switched, DC coupled vertical deflection circuit includes a source of a first DC supply voltage that is coupled to a first end terminal of a vertical deflection winding. An amplifier is...
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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...
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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...
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5936680 |
Multimedia television receiver
A pump-up circuit includes a first capacitor C1 connected to the power supply Vcc via a first change-over switch SW1 to the reference potential point or a second capacitor C2. The second capacitor...
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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...
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5814952 |
Device for correcting the ramp linearity of saw-tooth signals
A device for correcting the linearity of ramps of a saw-tooth signal provided across a capacitor, charged by a first current source and periodically discharged at a desired frequency. The device...
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5789874 |
Vertical deflection polarity switching circuit for CRT projector
Such vertical deflection polarity switching circuit for CRT projector can be provided that enables external, one-shot operational switching of the vertical deflection polarity. To switch a CRT...
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5770930 |
Vertical deflecting circuit using a raised source voltage
A vertical deflecting circuit comprises a vertical output circuit (12) which amplifies an input sawtooth wave signal and supplies a deflection current to a vertical deflection coil (13), a power...
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5666032 |
Linear scan control for a CRT display system
In a highly accurate linear scan control for a CRT image display system useful for reproducing photographic images, distortion effects produced by system transients resulting from deflection drive...
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5614793 |
Deflection circuit responsive to differential sawtooth signals
A pair of current sources, each having a high output impedance, are coupled to a pair of first and second inputs of a differential input stage of a vertical deflection amplifier. An output of the...
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5587631 |
Resistor-matched deflection apparatus for a video display
In a D.C. coupled vertical deflection circuit, an input sawtooth signal is coupled to an inverting input of a vertical deflection amplifier via a first resistor network. A D.C. voltage is coupled...
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5569985 |
Amplifier for scanning beam velocity modulation
Scanning beam velocity modulation or SVM may be employed to produce subjective enhancement of picture sharpness. However, impulsive SVM deflection current may produce unwanted crosstalk into other...
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5504539 |
Circuit for modulating vertical positions of a picture in a wide screen television
This invention relates to a circuit for solving a vertical interlace phenomenon generated by the instability of servo control when a mode of VCR operation is fast or still, comprising a vertical...
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5473223 |
Vertical deflection waveform generating apparatus
A vertical deflection waveform generating apparatus is provided to have a memory in which a function of a vertical deflection waveform is previously stored. The function is a function with an order...
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5465032 |
Vertical deflection circuit
A vertical deflection circuit includes a first pin which receives a forward scanning voltage having a first level and a first frequency. During a flyback period a second pin receives a flyback...
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5412290 |
50 Hz parabolic signal filter
A scanning waveform generator for operation at a first or a second scanning frequency comprises a source of a parabolic shaped signal having a frequency selectable between the first or second...
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5369341 |
Vertical retrace with zoom and centered fast retrace
A television receiver is controlled as to the degree of vertical zoom via a deflection current ramp that varies in slope and which may be delayed to achieve panning. Due to the increased slope when...
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5359267 |
Vertical deflection with vertical shrink mode
A differential amplifier formed by a pair of transistors couples a vertical sawtooth signal to an input side of a vertical deflection amplifier. Nonlinearity of the transistor pair provides...
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5287043 |
Apparatus for automatically generating a correct CRT display regardless of timing signals
Apparatus and method for generating a correct CRT display suitable for photographing without adjustment, regardless of horizontal and vertical timing signals. Sawtooth current waveforms of constant...
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5264762 |
Picture height adjustment arrangement for a video display
A first voltage-to-current converter responsive to a picture height adjustment control signal generates a first current in a capacitor for producing a trace portion of a sawtooth signal in the...
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5250879 |
Deflection circuit having a controllable sawtooth generator
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...
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5243263 |
Service adjustment arrangement for a sawtooth generator of a video display
In a vertical sawtooth generator of a D.C. coupled vertical deflection circuit, a vertical deflection amplifier generates a sawtooth signal. Magnitudes of the sawtooth signal in first and second...
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5237246 |
Process and device for adjusting pictures
A system for adjusting the position and size of a picture generated by deflecting a light source in response to a deflection current and displayed in a picture area larger than the picture includes...
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5220254 |
Anti-roll television vertical deflection system
Vertical deflection circuitry for substantially eliminating rolling and bouncing in a video monitor, where, for example, the video monitor successively displays images produced by each of one of a...
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5177414 |
Vertical deflection circuit
A saw-tooth wave signal is supplied to the non-inverting input terminal of a first power amplifier constituting a first negative feedback amplifier. The output terminal of the first power amplifier...
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5089755 |
Vertical deflection circuit
A vertical amplifier of a vertical deflection circuit has an output transistor operating as a conductive switch that couples a boosted supply voltage to a vertical deflection winding during...
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