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7045977 |
Vertical/horizontal amplitude controller
The vertical/horizontal amplitude control device for controlling a vertical amplitude and a horizontal amplitude of an image display device for displaying a video signal includes a brightness level...
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7030575 |
Deflection supply voltage feedback control in conjunction with frequency change
A video display includes a scanner operable at a first frequency and a higher second frequency. A switch mode power supply drives a transformer with three secondaries. First and second rectifiers &...
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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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6989639 |
Television image receiving apparatus and CRT display apparatus
In a configuration equipped with an anode current detecting resistor connected between a ground side terminal of secondary coils wound around a flyback transformer and generating a high voltage for...
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6987367 |
Cathode-ray tube
A prefocus lens section in an electron gun assembly includes a second grid that is disposed on an electron beam generating section side, a third grid that is disposed on a main lens section side,...
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6900849 |
Signal processing apparatus having means for reducing the power consumption
A signal processing apparatus (1) includes a power supply input (20), a power supply connection (30) and a power supply output (27). A supply voltage generator (33) is connected to the power supply...
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6847404 |
Video display protection circuit
An apparatus and a method for protecting a video display device, having an anode and a cathode, against excessive beam current conditions. In particular, the present invention protects the video...
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6744429 |
Abnormal operation prevention circuit for display device and method for operating the same
A display device includes a display unit with a plurality of pixels for displaying picture images, a driving unit for controlling operation of the respective pixels of the display unit, a power...
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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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6661187 |
Fly back transformer
A fly back transformer comprises a horizontal output section; a low-voltage bobbin forming a first coil; a high-voltage bobbin forming a second coil having high-voltage coil layers and high-voltage...
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6657840 |
Protecting circuit of horizontal transistor
A protecting circuit for a horizontal transistor used for protecting the horizontal transistor of a horizontal deflecting circuit in a cathode ray tube. The protecting circuit comprises a switching...
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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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6583589 |
Horizontal drive circuit incorporating an integrated boost switch-mode power supply for a CRT display
A horizontal drive circuit employed in CRT displays which uses a switch-mode power supply operating in a boost topology to generate the appropriate supply voltage needed by the horizontal drive...
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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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6504325 |
Cathode ray tube assembly including a socket with a resistor for changing dynamic focus voltage
A cathode ray tube assembly includes a funnel having a neck, an electron gun having an electron emitter within the neck and having at least two focus electrodes for forming an electron lens for...
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6498630 |
X-ray protection circuit
An x-ray protection circuit for a video processor, to disable a horizontal output pulse when a voltage level on the x-ray input exceeds a reference voltage. The x-ray protection circuit comprises a...
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6456020 |
Circuit for stabilizing a screen voltage of a video display apparatus
A circuit for stabilizing a screen voltage of the video display apparatus is capable of supplying a uniform screen voltage to the video display apparatus even though a voltage level of an output...
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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...
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6441590 |
Two stage architecture for a monitor power supply
A power supply according to the principles of the inventions comprises two stages. The first stage is a power factor corrector stage. This stage provides the required line regulation, including...
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6434030 |
Arrangement having a switched-mode power supply and a microprocessor
A switched-mode power supply with a control loop and a microprocessor has a normal mode and a low-power mode with a burst mode. The microprocessor is connected via an output to the control loop and...
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6417632 |
Deflection apparatus and control method thereof
A deflection apparatus capable of generating a stable deflection pulse in a deflection output circuit even when turning on the power source or changing over the frequency of horizontal...
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6396222 |
Cathode ray tube protection system
A cathode ray tube protection system for protecting a cathode ray tube from maintenance of high voltage residual occurring when power is turned on or off or due to abnormal operation in a...
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6326743 |
Horizontal linearity correcting circuit
An appartus for adjusting the correction amount of a horizontal linearity and suppressing the amplitude of a horizontal deflection current in an image display device. A switching element 11 is...
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6323607 |
Horizontal drive circuit in a display device which provides surge protection and a method therefor
A horizontal drive circuit for a video display device includes a switching device for switching according to a horizontal oscillation frequency generated by a horizontal oscillator and a surge...
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6310448 |
CRT display device having discharge current limiting resistors in high-voltage supply lines
Discharge current limiting resistors are provided in respective high-voltage supply lines for distributing high voltages produced by a high-voltage distributor to the anodes of respective CRTs. As...
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6297601 |
Apparatus and method for saving electric power in a display system
The present invention relates to an apparatus and a method for saving electric power in a display system in which, when the display system is turned to an off mode, a total electric power...
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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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6288504 |
Deflection current/high voltage integration type power supply
A deflection current/high voltage integration type power supply has a flyback transformer having a primary winding and a secondary winding; a series circuit of a deflection coil and a first...
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6285142 |
Display apparatus having a horizontal screen size adjusting circuit in step-up type
A display apparatus of multi-mode cathode ray tube is disclosed which is capable of enlarging a horizontal screen size by adjusting a size of the horizontal screen by employing a step-up type...
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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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6259217 |
Wide band horizontal size regulation circuit of a display
A wide band horizontal size regulation circuit of a display, is selectively switched according to input frequency, to control the amount of current transmitted to a current sensing port of a PWM...
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6252361 |
High-voltage power supply disabling circuit for video display
An ultor voltage switching power supply for a cathode ray tube is energized by a low voltage switching power supply. A switching transistor of the ultor voltage switching power supply is disabled...
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6252360 |
High voltage generator
The constitution comprises a circuit for feeding the blanking pulse winding voltage floating from a deflecting transformer 8 or a deflecting yoke 5 of a deflecting circuit 15 into a converter...
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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...
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6204616 |
CRT driving circuit
A CRT driving circuit includes a cathode control circuit for controlling a cathode voltage of a CRT on the basis of a video signal created by a video circuit, a power supply circuit for creating a...
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6201359 |
High-voltage generator including a high-voltage unit
A high-voltage generator includes a high-voltage unit (1) and a further voltage generating unit (2) for generating DC high voltages (UF1, UF2), the voltage generating unit (2) including an...
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6198237 |
Apparatus using double focusing type fly-back transformer
An apparatus using a double focusing type fly-back transformer is disclosed. A top bleeder type is adopted in drawing the focus voltage of the fly-back transformer instead of the conventional...
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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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6137245 |
Circuit for generating control grid voltage for cathode ray tube
A control grid voltage generating circuit comprises a high voltage source, a low voltage source and an amplifier biased by the high/low voltage sources. The high voltage source is coupled to the...
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6133698 |
Fractionated-rectification high-voltage transformer with grouped diodes
The disclosure is a stepped rectification high-voltage transformer including a secondary step-up winding in which at least two output diodes connected to two different stages of this secondary...
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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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6104174 |
High voltage power supply circuit
A speed-up circuit 10 is connected to a detection line 6 for feeding back the high voltage detection value of a high voltage detection circuit 5 to a high voltage stabilizing circuit 1. When 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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6049180 |
High voltage regulated supply particularly suited for visual displays
A supply is disclosed that develops a high dc voltage that may be applied to the anode of a cathode ray tube (CRT) of a display system. The supply provides the high dc voltage without the need for...
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6034729 |
Monitor protection system
A monitor protection system comprise a display power management signaling (DPMS) operating unit for performing a predetermined power control; a horizontal deflection detecting circuit for detecting...
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6020693 |
Method for reducing residual spot in cathode ray tube
A method is provided for reducing a residual spot on a cathode ray tube when a power supply is turned off. The method is executed by applying a holding voltage being no less than the value of the...
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6011706 |
Control of the output power of a DC-DC converter upon varying the switching frequency
The power output of a static DC--DC converter employing a current mode PWM controller is controlled upon the varying of the switching frequency, by detecting the sawtooth signal produced by the...
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