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7499111 Projection type display device and back projection type display device using the same  
The system provides a projection-type video display device with high image quality and high reliability. The system improves color purity by cutting the yellow component from red and green,...
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...
7057336 Electron-emitting device, electron source and image-forming apparatus as well as method of manufacturing the same  
An electron-emitting device comprises a pair of electrodes and an electroconductive film arranged between the electrodes and including an electron-emitting region carrying a graphite film. The...
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...
6822699 Cathode ray tube and method of displaying picture  
A main picture is displayed in monochrome in a main picture display area by emission of a first phosphor layer formed of a white emission phosphor. A second phosphor layer formed of a phosphor...
6690339 Method and circuit arrangement for controlling the operating point of a cathode ray tube  
A method and a circuit arrangement for controlling the operating point of a cathode ray tube ( 3 ) for use in image technology applications. A video signal ( 1 ) is supplied to both the tube ( 3 )...
6674231 Panel for color cathode ray tube with seal and surface having rough surface  
A panel for a color cathode ray tube includes an opening portion provided with a seal end surface to which a funnel is sealed through a frit glass. The seal end surface of the opening portion is a...
6664747 Dynamic focus regulation circuit of display apparatus  
A horizontal dynamic focus regulation circuit, which induces a horizontal dynamic focus waveform voltage by a horizontal deflection circuit generating a different frequency according to a display...
6590620 CRT display image horizontal distortion correction device  
In a CRT display apparatus, a horizontal distortion correction apparatus is provided for correcting horizontal distortion of an image by applying a residual phase to control the phase of a...
6570625 Display apparatus and display method  
Anode voltages A′ and B′ corresponding to video signals A and B are switched by a first switch and supplied to an anode. Cut-off voltages A and B corresponding to the video signals A and B are...
6563552 Image correcting method and device and cathode ray tube display unit  
Provided are an image correcting method and device capable of reducing power consumption necessary for correcting an image for a long-time use and a cathode ray tube display unit. A microcomputer ...
6552752 Clock generating based on a reference signal included in the digital input data of a digital broadcasting receiver  
When an STB is powered off when it is not used (when it is changed to the sleep mode) for the purpose of power-saving, a difference in a subtracter immediately therebefore is held by a control...
6509936 Cathode ray tube with magnetic coil for display enhancement  
A method and projection television system for projecting images having a plurality of color components, includes a device for filtering a first color component signal from a composite signal to...
6506317 Cooling medium for optical equipment and cooling device using the same  
A cooling medium and a cooling device for optical equipment using the same, which cooling medium has a refractive index in a specific range, hardly causes the problem to dissolve or swell plastic...
6493040 Scan velocity modulation circuit with multi-mode operation  
A video display deflection circuit includes a source of a video signal for displaying picture information contained in the video signal in a screen of a cathode ray tube. The video signal provides...
6489994 Method and device for protecting a cathode ray tube in an image displaying device by using a brightness control circuit  
A method and device utilizes a brightness control circuit for protecting a cathode ray tube in an image displaying device. The displaying device has an image signal amplifier, a cathode ray tube,...
6483557 Emission control in a video display  
Unintentional emissions are controlled responsive to the spectral content of the display signal. A video display apparatus comprises a cathode ray tube responsive to a video signal. A processor...
6384876 Vertically configured video projection system  
A video projector is arranged with three color CRTs vertically aligned with respect to a forwardly located projection surface. The projection surface is in a room having opposite side walls on...
6377319 CRT mounting bracket for projection television sets  
A projection television set having a screen and three projection units each capable of projecting a monochromatic image onto the screen. The projection units each having a cathode ray tube (CRT)...
6369851 Method and apparatus to minimize burn lines on a display  
A method and apparatus for displaying a video signal is described. A video signal is received representing an image having a first aspect ratio, with the image having a top and bottom edge. An edge...
6262524 Electron gun with electron beam converging member disposed between quadrupole and main lens and a cathode ray tube employing the same  
A color cathode ray tube, and an electron gun of the same, having a superior focus characteristic. An electron gun is provided, emitting electron beams through a Gla electrode, G2a electrode, GMAa...
6256074 Control signal generator for dynamic focus disabling  
A video imaging apparatus includes a source of a blanking signal that is indicative when a blanking interval occurs in a video signal. A delay circuit including a horizontal line counter is...
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...
6169587 Raster V-size adjustment circuit  
A circuitry for attaining a fixed raster vertical scan size of a video display apparatus is proposed. The video display apparatus comprises a flyback transformer (FBT) which includes a primary...
6072547 Color display device  
A color display device having a color display tube with a display screen, comprising an electron gun for generating three co-planar electron beams, and a deflection system which, in operation,...
6064434 Beam current measurement  
In a beam current measurement device, including an output transistor (T1) for supplying a cathode current (Ic), a measurement output (OUTM) for supplying a measured current (Im) representing the...
6020939 Method and apparatus for reducing electromagnetic interference radiated by cathode ray tube displays  
Electromagnetic interference ("EMI") is reduced in a CRT video display system by spreading-out the EMI-producing spectra present in the video pixel data and/or clock signals. A clock dropping...
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...
5977727 Electron beam profile and energy shaping lens  
An apparatus and method to dynamically shape the projected energy profile of an electron beam and the energy distribution of an electron beam of a cathode ray tube to provide a single cathode ray...
5956099 Dynamic focus circuit and display using the same  
A circuit for clipping a dynamic focus voltage waveform during a horizontal retrace time is provided so as to prevent an unnecessary voltage from occurring during the retrace time. A high gain...
5926211 Method of measuring focus of cathode ray tube  
In a method of measuring a focus of a cathode ray tube, a predetermined image is displayed at a predetermined position on the screen of the cathode-ray tube. A focussing voltage of the cathode ray...
5923387 Picture display apparatus and method of generating a focusing voltage  
A focusing waveform (Vf) is obtained by first generating (2) two intersecting triangular waveforms of opposite phase and half the deflection frequency. Subsequently, the difference between these...
5841487 Circuit arrangement for controlling a picture display tube  
In a circuit arrangement for direct current control of a picture display tube having a non-linear voltage/current characteristic by a precorrected picture signal, the picture signal is applied to a...
5805211 Electrostatic probe device for signal detection of cathode ray tube displays  
An electrostatic probe device detects signals displayed on a cathode ray tube in a non-invasive manner. Specifically, the probe device includes a probe that is spaced from a fluorescent screen of a...
5793448 Cathode ray tube packages  
A cathode ray tube package includes a cathode ray tube assembly and a housing assembly including a deflection coil and/or at least one focus coil. The cathode ray tube assembly includes a collar...
5786903 Multi-power control system for scanners  
The present invention discloses a multi-power control system for scanners. The method of the present invention has a mode of warm up time, which is controlled by a software that is embeded in a...
5627598 Display apparatus including aspect ratio converter and child picture processing with four field sequence memory  
A display apparatus wherein a video signal of a child picture read out at a double speed is inserted accurately with a high resolution into a parent picture of another video signal having a double...
5627597 Device and method for interlacing a video signal having an integral number of scan lines in each field  
A television receiver is provided which includes a vertical deflection circuit which causes interlacing of an interlaced video signal having two fields each with an integral number of scan lines....
5606377 CRT having an implosion protection band with brackets  
The invention relates to an implosion protection band 26, 126 for a CRT having a plurality of brackets 40, 70, 140 that are disposed between the band and a sidewall 3 of the CRT 1 and detachably...
5555032 Integrated circuit for economizing power consumption of a monitor by using two reference values for discrminating the input signal  
An integrated circuit for power management adapted to be used with a monitor which comprises a signal discriminator storing two reference values therein for being put in comparison with an input...
5552663 Cathode ray tube apparatus  
The present invention enlarges the effective display area of a CRT for projecting while maintaining the strength of the panel necessary to allow for normal usage without breaking. The inside...
5528312 Beam scan velocity modulation apparatus with SVM disabling circuit  
Beam scan velocity modulation (SVM) apparatus with a svm disabling circuit employed for picture sharpness enhancement is disclosed. The beam SVM includes a picture display device, a source of a...
5523789 High definition television monitor for displaying video images reproduced from normal standard video signals  
A high definition television monitor which raises the level of a convergence voltage by a predetermined voltage in one of two consecutive horizontal periods in which the same video signal is...
5495214 Method and apparatus for controlling the operating point of an amplifier stage  
At high frequencies, a video amplifier draws a higher current and normally is biased to provide such current. However, since high frequencies are rarely encountered, the present circuit controls...
5452025 Television set with sound-reflecting sidewalls  
A television set has a cabinet, a cathode-ray tube and first and second speakers having respectively first and second centerlines. The cabinet is formed with first and second sound-reflecting...
5390020 Video amplifier stabilization for CRT printing  
A system is provided that causes the CRT of a CRT printer to produce images on the screen of the CRT that have the same illumination for the same CRT input signal, irregardless of the temperature...
5387896 Rasterscan display with adaptive decay  
Apparatus for manipulating numerical values stored in a memory comprises a modify device for receiving numerical values from the memory and returning numerical values to the memory. The modify...
5299007 Vertical reset generation system  
A video display control system comprises a display for the video signal, a vertical zoom circuit for generating from the video signal a picture having a vertical height greater than the display,...
5291295 System for equalizing phosphor aging in CRT, subject to different aspect ratio displays by operating unused display portions at brightness levels determined by the brightness levels of corresponding adjacent similar sized display portions  
A brightness management arrangement for equalizing the aging of the phosphor screen of a 16:9 aspect ratio cathode ray tube used for 4:3 aspect ratio video displays provides low level illumination...
5287179 Image display system  
An image display system is provided in which an image to be displayed is subdivided into a plurality of images. The plurality of images are displayed on a plurality of display devices. An image is...
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