Abstract: A video processing system is described for providing an image having more than one region on a display (DISPLAY). The system has a control means which can determine, for each region, the type (e.g., graphics, text, computer programs, broadcast TV video, etc.) of the image material being displayed in the region. The system also has a video driver coupled to the display for providing image signals having contrast and brightness characteristics. The control means generates a control signal for causing said video driver means to adjust said contrast and brightness characteristics of said image signals according to the type of material being displayed in said region.

Abstract: Method and apparatus for using a wide screen television receiver operating at 2f.sub.H as a VGA or SVGA monitor. The VGA or SVGA board in a computer is programmed to generate an RGB video signal representing a picture having fewer than a normal number of horizontal lines than a conventional VGA or SVGA picture having a 4:3 format display ratio, in order to define a picture having a wide format display ratio, for example 16:9. The separate synchronizing signals of the RGB video signal are converted in polarity and phase, as necessary, to a form recognizable by a video processing circuit of the wide screen television receiver.

Abstract: In accordance with the present invention, a display apparatus 8 comprises a color CRT 10 having an evacuated envelope 11 with a faceplate panel 12 sealed to one end of a funnel 15 that is closed at the other end by a neck 14. The faceplate panel has a luminescent screen 22 on an interior surface thereof. A shadow mask 25 is located in proximity to the screen. The shadow mask comprises a metal sheet having a central portion and an exterior portion with a plurality of apertures 40, 43 therethrough. An electron gun 26 is disposed within the neck for generating and directing electron beams 28 toward the screen. A deflection yoke 30 is disposed around the envelope at the junction of the neck and the funnel. The yoke deflects the beams to scan a raster across the screen.

Abstract: A set of auxiliary deflection coils are placed on opposite sides of a multi-beam color television picture tube having a deflection yoke and color purity adjustment apparatus. The tube is operated to cause a raster to be scanned and the auxiliary coils are energized to cause the beams to be deflected from their nominal beam landing sites in predetermined direction and magnitude within each of at least two regions of the raster in order to simulate misregister caused by television receiver magnetic environment. Color purity is then adjusted in the presence of the simulated misregister.

Abstract: In a multi-beam color display tube, having a screen on which phosphor deposits are disposed which are impinged upon by the electron beams so that they luminesce with different colors, one electron beam at a time is activated and scanned while the picture to be displayed is a blank raster. A special post-deflection coil introduces magnetic fields in the region just forward of a deflection yoke to displace the scanned beams in a controlled pattern from their normal landing points on the screen while photosensors measure the light from each color deposit at a plurality of measurement locations on the screen. The displaced beam causes the emission of an error color, the intensity of which is measured by those photosensors which are sensitive to the error color emitted. The intensity of a reference color emitted by the phosphor deposits stimulated by the undisplaced electron beam is then measured.