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8035738 |
Apparatus and method of controlling black stretch
An apparatus for controlling black stretch includes a black stretching unit, an offset adjusting unit and an output unit. The black stretching unit performs black stretch processing on a video...
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7950029 |
Method for interactive television using foveal properties of the eyes of individual and grouped users and for protecting video information against the unauthorized access, dissemination and use thereof
A method of interactive television providing for generating, transforming or displaying video information taking into account individual peculiarities of the user's eye and individual peculiarities...
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7898557 |
Image displaying method, image displaying device, and contrast-adjusting circuit for use therewith
A system provides an image displaying technique that provides stable high contrast even in an area having high brightness. Based on information about an average brightness level of a digital...
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7792752 |
Video financial deposit
A video of a negotiable instrument may be provided from a user to a financial institution so that an image of the negotiable instrument may be obtained from the video and deposited in a user's bank...
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7719551 |
Image displaying method, image displaying device, and contrast-adjusting circuit for use therewith
A system provides an image displaying technique that provides stable high contrast even in an area having high brightness. Based on information about an average brightness level of a digital...
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7583322 |
Television and adjustment method for the same
A pedestal level of each of the R-Y and B-Y signals (color-difference signals) in a horizontal synchronization time T1 of a horizontal synchronizing signal is detected, and a pedestal level...
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7502077 |
Device and method for processing video signals to improve the black contrast
A video signal-processing device that can improve the apparent contrast of the luminance signal at a television receiving set includes a quantity of black expansion computing section for...
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7286175 |
Bias control circuitry for cathode ray tube beam currents
Bias control circuitry and method for use in controlling one or more cathode ray tube (CRT) beam currents.
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7286183 |
Device for generating a video image sharpness improvement signal
A device for producing a video image sharpness improvement signal (DOC21-DOC22), with black level clipping of an associated video signal, comprises a differential transconductance stage processing...
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7277136 |
Adaptive bandwidth control in a kinescope amplifier
A method for controlling dissipation in a video amplifier for a display signal. The method comprises the steps of setting a first current for establishing a first gain bandwidth product in the...
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7236203 |
Video circuitry for controlling signal gain and reference black level
An apparatus and method for controlling signal gain and reference black level of a video signal. Magnitudes of signal gain and reference voltage for a subject video signal are determined by a...
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7227559 |
Image displaying method, image displaying device, and contrast-adjusting circuit for use therewith
A system provides an image displaying technique that provides stable high contrast even in an area having high brightness. Based on information about an average brightness level of a digital...
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7187414 |
Circuit for stabilizing high tension voltage of CRT, and method thereof
Disclosed is a circuit for stabilizing a high tension voltage of a CRT and a method thereof. A feedback unit receives a cutoff voltage from the CRT. A compensating unit calculates a variation...
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7027098 |
Picture-signal processing apparatus and method using weighting for black-level control
A digitized luminance signal, representing the luminance component of a picture signal, is adjusted according to data stored in a memory. The data are output according to the value of the digitized...
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6952235 |
Apparatus and method for controlling black stretch of video signal
An apparatus and method for adaptively varying a black stretch control range and a gain according to a mean level of a video signal to control black stretch of the video signal. According to the...
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6937287 |
Video processing apparatus and method
In order to reduce the total capacity of a ROM used for adjustment of the black level and the white level of a digitized luminance signal for a television receiver, for example, a comparator...
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6937288 |
Beam current limiting circuit for use in a video projector
In a beam current limiting circuit for a video projector, an average current is limited under closed loop control containing an anode current detection circuit 5. On the other hand, a cathode...
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6900830 |
CRT display device with improved resistance to spot bun
A CRT display device includes an on-screen display circuit for producing a display signal displayed on-screen on a CRT and superposing said produced display signal on a video signal; a brightness...
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6897901 |
Circuit for combining AKB and selective beam current limiting and projection television system utilizing same
A control circuit for use in a video processor utilizes combined automatic kinescope bias (AKB) control, and average individual beam current sensing and limiting in at least one CRT. The control...
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6897900 |
Display apparatus comprising a cathode ray tube (CRT)
A display apparatus, for instance a television receiver, comprises a cathode ray tube, a first circuit for providing a high voltage to the cathode and a second circuit receiving a gross signal and...
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6888575 |
Digital cut-off control loop for TV using speeding and blanking circuits
An improved digital cut-off control loop for black level adjustment in a video processor for controlling RGB output signals. The improved circuit advantageously provides a higher resolution of the...
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6870576 |
Automatic beam limiter circuit
An automatic beam limiter circuit (ABL circuit) calculating an average of a video signal at least a portion of the video signal is provided. After a converter circuit converts an analog signal,...
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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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6563496 |
Cut-off adjusting apparatus
A cut-off adjusting apparatus in which a signal source for detecting cathode current is not required, the cost can be reduced, the cathode current can be detected with high precision, and 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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6556254 |
Black and white level stabilization
In a black and white level stabilization device, an OSD signal generator (OSD-SG) generates black and white reference signals (OSD-R/G/B), amplifying circuits (VA-R/G/B) amplify the black and white...
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6549246 |
Method for driving projection cathode ray tube
In a projection CRT, an image of high brightness is displayed on a screen as an electron beam emitted from an electron gun is scanned according to an image driving signal. The image is magnified...
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6541927 |
Color cathode ray tube and adjusting method
The format of a color video signal that has been inputted into a CPU from a video amplifying circuit is identified, and based on a given parameter variable according to this identified format, a...
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6433827 |
Measurement-free G2 calibration of color picture tubes
A method for calibrating a screen grid voltage of the color picture tube in a color television set having automatic cut-off regulation. The method comprises the steps of, changing a normal...
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6369527 |
Vertical blanking circuit and bias clamp boost supply
A vertical blanking amplifier and bias clamp boost supply in accordance with the present invention uses the amplified vertical blanking signal to generate the boosted high voltage needed for...
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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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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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6288690 |
Video control circuit for a video display device
A video control circuit controls the gains for red(R), green(G), and blue(B) color video signals inputted to a monitor, the brightness and contrast of a video display on the monitor, and the bias...
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6285401 |
Apparatus for suppressing overshoots in kinescope beam current measurement pulses
Display apparatus includes a kinescope cathode current sensor (18) coupled to a load (200) for developing a beam current measurement pulse during a beam current measurement interval. Overshoots in...
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6226037 |
AKB interface circuit for kine driver IC
An AKB interface apparatus in a display system (10), includes a video signal processing IC (12) having outputs coupled via respective kinescope driver ICs (18,20,22) to respective kinescope...
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6211629 |
Cut-off level setting
The cut-off level (Vcod) of a drive signal (Vd) of a cathode ray tube (3) is (Ib1, Ib2) occurring at these two levels (Vd1, Vd2).
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6211908 |
Television apparatus with supplementary kinescope blanking and spot burn protection circuitry
Supplementary grid blanking and spot burn protection are provided in a receiver/monitor (10) by a grid bias control circuit (50) including a blanking signal generator (60) that produces a blanking...
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6097445 |
White balance self-adjusting apparatus for use in color display
A color display with a white balance self-adjusting function, including a DC-voltage-level/gain adjusting circuit for adjusting, on the basis of adjustment data, the DC voltage level and the gain...
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6069660 |
Automatic black level stabilizing apparatus
An apparatus for automatically stabilizing the black level of a displayed picture when (1) an automatic black level stabilizing function is OFF, (2) black level error occurs between at an ON state...
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5994841 |
Circuit for biasing display device by compensating for a varying leakage current
A circuit apparatus and method is disclosed for determining the actual beam current of a display device having at least one cathode and that actual beam current is used to both correctly bias a...
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5969762 |
Video signal driver including a cascode transistor
A kinescope video driver includes a series connection of a main cascode transistor coupled to a cathode of a cathode ray tube and a video signal amplifying transistor. A second cascode transistor...
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5920351 |
Black level detecting circuit of video signal
A black level detecting circuit compares an input video signal with a current minimum value of input video signals, then detects a difference between the input signal and the current minimum value...
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5894327 |
Video display system with AKB responsive screen grid supply
Video signals to be displayed are applied via a video driver amplifier to the cathode electrode of a kinescope. A beam current sensor, also coupled to the cathode electrode, provides a beam current...
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5892337 |
Black level setting
In a method of black level and gain control setting, including the steps of applying (42) at least two mutually differing control values (Vd1, Vd2) in a first predetermined ratio, and controlling...
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5835161 |
Kinescope driver apparatus with gamma correction coupled with feedback cathode current sensor
An amplifier (60) provides an amplified video signal in response to a video input signal supplied thereto. A cathode current sensor (Q3), couples an output of the amplifier to the cathode of a...
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5726540 |
Transient enhancement circuit for CRT amplifier
A transient improvement circuit is disclosed for cathode ray tube (CRT) amplifiers with automatic kinescope bias feedback circuits. An NPN transistor and a PNP transistor are provided, each having...
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5589883 |
Cathode ray tube display
A cathode ray tube display in which a signal for detection of a cathode current is inserted into a part of the vertical blanking period of the video signal to be displayed, a cathode current...
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5488417 |
Automatic kinescope bias control system
A controllable current source in an AKB circuit applies a measurement current to a kinescope driver amplifier during selected lines of the vertical interval of a video input signal to induce a beam...
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5410223 |
Display device including a black level setting circuit
Known display devices include a video signal processing circuit with a black level setting circuit. This black level setting circuit measures the black level of the video signal, for example,...
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5410222 |
Sample pulse generator for automatic kinescope bias system
Control circuitry, in an AKB sample pulse generator, enables charging of a capacitor upon initiation of a vertical retrace pulse, initiates discharge of the capacitor in response to termination of...
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