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7221112 |
Cathode ray tube display apparatus
A cathode ray tube display apparatus having a fly back transformer (FBT) to induce and output high voltage, the CRT apparatus including: a power controller controlling source power input into the...
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7098613 |
High voltage deflection circuit
A resonant pulse voltage having a positive polarity is applied by a first resonant circuit and a third resonant circuit to a horizontal deflection coil included in the first resonant circuit, and a...
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7023149 |
CRT vertical scanning circuit with a low power standby
The invention concerns a scanning circuit, comprising a power supply providing a negative voltage on a first terminal (Tdown), an intermediate voltage on a second terminal (Gnd) and a positive...
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6819064 |
Display system
A display system capable of raising limits on the response speed of the spatial light modulator and the rate of pulse-width modulation signal transfer is provided at a low cost. The display system...
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6690126 |
Power supplying apparatus for electron gun in CDT
Disclosed is a power-supplying apparatus for an electron gun in a color display tube (CDT) provided with an fly back transformer (FBT) having a focus voltage output terminal and an acceleration...
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6667588 |
Multi standard television display
An image display is operable with video signals having a plurality of scanning frequencies and comprises a cathode ray tube for the display of ones of the video signals. A deflection coil is...
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6661188 |
Cathode ray tube filament voltage control with a multifrequency deflection scanner
A power supply for a video display tube includes a deflection transformer with a primary winding powered with a scan voltage which has a first value when displaying signal according to a first...
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6642676 |
Electromagnetic quadrupole circuit which independently corrects ac and dc components of correction current
An electromagnetic quadrupole circuit capable of always performing the optimal correction of the spot form is provided with: a current detecting section 20 for detecting the peak value and bottom...
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6605909 |
Dynamic horizontal linearity correction
A horizontal deflection circuit output stage includes a trace capacitor for developing a trace voltage. A retrace capacitance is coupled to a deflection winding to form a retrace resonant circuit...
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6600277 |
Power supply
The invention relates to a power supply (9) for a deflection circuit (1), that comprises a deflection coil (2) for connection to a picture tube, a drive circuit (4,5,6) connected to the deflection...
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6586895 |
Raster distortion correction circuit
A horizontal deflection circuit includes a horizontal deflection winding coupled to a retrace capacitor to form a retrace resonant circuit. An S-shaping capacitor is coupled to the deflection...
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6577084 |
High voltage flash detection
A method and device are described for detecting whether a flash (F) has occurred in the high voltage part of a combined high voltage and horizontal deflection circuit (100) in an apparatus...
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6555976 |
East-west distortion correction
An apparatus for the correction of East-West distortion of images produced on the screen of a picture tube. More particularly, it concerns an electronic circuit for dynamically controlling the AC...
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6552504 |
Deflection circuit with a feedback controlled capacitive transformation
A horizontal deflection circuit includes a first retrace capacitance and a second retrace capacitance. A horizontal deflection winding is coupled to the first and second retrace capacitances to...
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6479953 |
Deflection circuit with a retrace capacitive transformation
A horizontal deflection circuit of a video display includes a first retrace capacitance and a second retrace capacitance. A deflection winding is coupled to the first and second retrace...
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6452347 |
Method and apparatus for deflection
A primary winding of a transformer is serially connected to a horizontal deflection coil. An amplitude regulating circuit outputs a first correction voltage in response to a voltage generated on a...
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6404148 |
Switching apparatus for horizontal driving pulse
In a horizontal deflection circuit, a waveform response of a horizontal output pulse must be adequately taken into account before and after a switching of the horizontal output pulse so that the...
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6337545 |
Apparatus and method for generating voltage for driving cathrode ray tube
A CRT driving voltage generating apparatus which can be realized and integrated at low cost, and can prevent breakdown and malfunction of circuits by actively adapting to a change in the frequency...
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6323606 |
Monitor deflection circuit
A monitor deflection circuit includes a bipolar power transistor for applying power from a high voltage supply to a horizontal deflection coil. The monitor deflection circuit further includes a...
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6297602 |
High voltage regulation by switching retrace capacitors
A circuit for regulating an anode voltage in an information display apparatus. A horizontal deflection circuit has trace and retrace modes of operation. The horizontal deflection circuit further...
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6291948 |
Image distortion correction circuit
An image distortion correction circuit is provided in which a horizontal deflection current (IH) flows through horizontal correction coils (L1, L2) and a vertical deflection current (IV) flows...
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6288503 |
Compensation of picture tube ageing effects
At the onset of ageing or in the further course of their service life, color picture tubes relatively frequently exhibit a rise in the field strength between the cathode (K) and the Wehnelt...
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6288502 |
Horizontal position adjusting circuit for raster
A horizontal position adjusting circuit for a raster includes a reference voltage outputting unit for outputting a reference voltage to enable a raster to be centered on a fluorescent screen; a...
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6274989 |
Dynamic damping clamper arrangement associated with s-shaping capacitor
A resistor-capacitor-diode clamp is coupled to an S-capacitance of a horizontal deflection circuit output stage for reducing ringing by causing critical damping. The supply voltage of the output...
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6222330 |
Horizontal deflecting circuit
A power source to drive a deflecting output unit is fixed, thereby simplifying so that it is possible to cope with two or more different horizontal frequencies. A resonance capacitor 4a and an...
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6218791 |
Deflection correction
A deflection circuit includes a deflection correction circuit (Vs) with a controllable active voltage source (Vs) arranged in a loop formed by a deflection coil (Ld), an S-capacitor (Cs), and a...
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6208093 |
Selectable clampers for an S-shaping voltage of a video display
In a horizontal deflection circuit output stage of a video display monitor capable of operating at multi-scan rates, a given S-capacitor, selected from a bank of S-capacitors, provide S-correction...
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6160364 |
Circuit for limiting horizontal image size of display
A circuit fixedly limits the horizontal image size of a screen of a CRT display. The circuit for limiting the horizontal image size of the screen detects a voltage indicative of the horizontal...
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6147464 |
Method and device for compensating the horizontal scanning size
A compensation control circuit of horizontal scanning size suitable to be used in a general monitor to compensate the variation amount of horizontal scanning size due to the influence of the anode...
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6137243 |
Correction of corrupted data in capacitor switching control to maintain horizontal linearity in video monitors
The present invention is a method and apparatus for selecting a capacitor value corresponding to a horizontal frequency in a video monitor. The technique determines the horizontal frequency and...
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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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6114817 |
Power Supply for a deflection circuit operating at multi-scan frequencies
A television apparatus set has the capability of selectively displaying picture information obtained from a broadcast television signal and a display monitor data signal. A zero voltage switching...
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6111371 |
Switch control signal generator
A scan frequency detector is responsive to a horizontal synchronization signal to generate a data signal that is indicative of the horizontal scan frequency. A digital-to-analog (D/A) converter...
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6081079 |
Horizontal deflection drive circuit using a plurality of FETs
A horizontal deflection drive circuit using a plurality of FETs is provided, which includes a base drive current supply for receiving an oscillation pulse in a low level generated by an oscillation...
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6060846 |
Diode modulator generating a line S-correction
A diode modulator circuit which is adapted to supply an acceptable S-correction of the S-linearity error of the line scanning of a picture tube (CRT) at substantially different line scan widths. A...
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6051985 |
Horizontal circuit drive analyzer and method of analyzing the horizontal circuit drive of a video display
A method and apparatus for testing the horizontal drive stage of a cathode ray tube display where the horizontal drive stage has a drive output which is directed to the base of a horizontal output...
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6025680 |
Horizontal deflection circuit and cathode ray tube display apparatus using the same
A horizontal deflection circuit including a horizontal deflection output circuit and a horizontal sawtooth wave current generation circuit. The horizontal output deflection circuit has a horizontal...
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6018222 |
Dynamic focusing circuit for a CRT and display apparatus incorporating same
The invention relates to a dynamic focusing circuit with an output (1) for supplying a dynamic focusing voltage (Vf) to a focus electrode of a cathode ray tube (CRT). The dynamic focusing voltage...
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5994852 |
Wide band high voltage stabilizing circuit
A wide band high voltage stabilizing circuit supplies optimum voltage to a fly back transformer (FBT) according to the change of horizontal frequency or high voltage by connecting a charge storage...
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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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5963135 |
Proximity detecting device
The present invention relates to a proximity detecting device for detecting the presence of an object in a target area, comprising a low voltage power source, a circuitry for generating electrical...
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5962994 |
Horizontal deflection output circuit for high-frequency horizontal scanning
A horizontal deflection output circuit has a resonance circuit including a horizontal deflection yoke for generating the horizontal deflection signal, a first switch element, a second switch...
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5962993 |
Horizontal S-shape correction circuit
The turn-off period of the FET (111) is adjusted by changing the output pulse width of the MM (113) according to the horizontal deflection frequency, to adjust the total capacitance value of the...
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5955848 |
Horizontal deflection S-shaped correction signal circuit with variable capacitance
A horizontal S-shaped correction signal circuit having a correction condenser disposed in a cathode ray tube (CRT) horizontal deflection circuit such as in a television receiver, a display monitor,...
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5945793 |
Display device having set protection function upon generation of abnormal voltage
A display device having a set protecting function upon generation of an abnormal voltage includes a horizontal deflection circuit for providing a horizontal signal to a deflection yoke connector, a...
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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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5939844 |
High-frequency horizontal deflection/high-voltage generation apparatus for cathode ray tube
A high-frequency horizontal deflection/high-voltage generation apparatus capable of setting inductance of a deflecting yoke without being affected by a collector voltage of a horizontal switching...
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5933335 |
Compact solid state klystron power supply
A line type modulator for modulating an RF power device in a medical linear accelerator is described. The modulator employs a low voltage DC power source and a flyback transformer. Current sensing...
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5925991 |
Electron beam focus voltage circuit
There is provided a circuit and method for generating a focus voltage having a predetermined waveform and magnitude for application to an electron beam focus means of a cathode ray tube having a...
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5914574 |
Stray emission reduction circuit
The most popular method for reducing stray emission effects in a cathode ray tube is to install a bleeder resistor at the flyback transformer of the tube. Such a bleeder resistor is, however, quite...
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