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7339625 |
Optical and electrical blending of display images
A method and a device for soft edge blending of projected display images ( 16 a , 16 b ) is provided. The method combines optical and electrical soft edge blending in an blending area ( 26 ) by...
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7312835 |
Projection type display apparatus
In a projection type display apparatus including a blue CRT display apparatus with low luminous efficiency and low luminous efficiency, the present invention seeks to improve contrast while...
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7268837 |
Method and system for automated convergence and focus verification of projected images
A method and system that objectively measures the convergence and focus of a 2 or 3 spatial light modulator (SLM) projection display. The system uses five (5) CCD cameras and a frame grabber to...
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7224411 |
Digital projection equipment and techniques
Apparatus and techniques for enhancing characteristics of electronic projection systems are detailed. Included among the techniques are both superimposition of sub-images and tiling of superimposed...
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7215362 |
Auto-calibration of multi-projector systems
The method for automatically calibrating a multi-projector system with at least two projectors, a digital camera and a control unit for controlling the projectors and the camera is performed...
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7176986 |
Projection television
A projection television including a CRT assembly projecting image beams and a reflecting mirror reflecting the image beams. The projection television has a support casing having support frames...
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7011416 |
Projection television
A projection television having a CRT assembly projecting image beams and front and rear casings, respectively provided in a front and a back of the CRT assembly, and further having a pair of CRT...
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6967632 |
Multi-monitor, auxiliary monitor, and monitor supporter
A multi-monitor is provided with a first display device having a display screen and a second display device having a display screen smaller than the display screen of the first display device, and...
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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...
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6806872 |
Video signal processing system
It cannot be ensured that display setting changes are made at once in a system in which the number of display settings for a display processing apparatus is extremely large, an application is...
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6803971 |
Projection type video display device that prevents color nonuniformity
Two of four light sources have canceling characteristics with respect to color nonuniformity, and the other two light sources have canceling characteristics with respect to color nonuniformity. A...
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6755535 |
Enclosure for projection television sets
A projection television set having an enclosure housing a screen, an optical unit and a mirror, wherein the optical unit and mirror are capable of projecting an image onto the screen. The enclosure...
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6570623 |
Optical blending for multi-projector display wall systems
A multi-projector video wall system employs a blending frame to blend the overlapping portions of two adjacent images I 1 and I 2 . The blending frame is preferably located a distance D frame ...
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6545718 |
Cathode ray tube and apparatus and method of controlling brightness
A control portion detects a level of video signals for each color when video signals are inputted from a frame memory to DSP circuits. Next, the control portion calculates an appropriate correction...
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6501517 |
Optical system in projection television receiver
An optical system in a projection television receiver includes: a screen for simultaneously displaying R (Red), G (Green) and B (Blue) images thereon; and a light source part comprising R, G and B...
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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...
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6377317 |
Method and apparatus for correcting color component focusing in a rear-projection television set
A rear-projection television set in which two different dynamic focusing waveforms are used. The first dynamic focusing waveform is used only to focus an electron beam in a CRT generating the blue...
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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)...
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6377306 |
Method and apparatus for providing a seamless tiled display
A display for producing a seamless composite image from at least two discrete images. The display includes one or more projectors for projecting each of the discrete images separately onto a screen...
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6369864 |
Optical unit spacer-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)...
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6342929 |
Projection image display apparatus
The projection image display apparatus includes a plurality of image generating sources for generating three primary colors, including red, green, blue image light, respectively, and a projection...
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5877823 |
Projection television device
A projection television device includes a projection cathode-ray tube for red (1a), a projection cathode-ray tube for green (1b) and a projection cathode-ray tube for blue (1c) which are provided...
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5712691 |
Method and apparatus for area dependent dynamic blue de-focusing
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...
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5559564 |
Cathode ray tube apparatus for projection TV system
A cathode ray tube apparatus for a projection TV system which improves the color purity of the luminescence in the cathode ray tube, reduces the chromatic aberration by the projection lens, enables...
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5534949 |
Two channel field sequential color display system
A two-channel field sequential display system utilizes both simultaneous and sequential color display methods to display full color images in a way that is less complex, smaller in size and less...
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5473391 |
Convergence displacement correcting device for projection-type image display apparatus and method thereof
A projection-type image display apparatus, in which a correction raster shape correction circuit is supplied with a sawtoothed-shaped voltage changing in level in accordance with a static...
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5418579 |
Multiplanar image display system with plural display units
A multiplanar image display system having a plurality of display units disposed to expose, by transmission through and reflection by transparent panels, displayed images to a viewing end of an...
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5373347 |
Staggered multiple CRT's in a photographic process printer
A photographic printer that uses a plurality of small CRTs to print wide format images. Within the printer, the CRTs are positioned horizontally adjacent one another but vertically displaced so...
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5367380 |
Velocity modulation apparatus for three-tube projection TV
In the velocity modulation apparatus for a three-tube projection television, an effective velocity modulation can be implemented under due consideration of humans eye's relative visibility...
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5337093 |
Projection television system including a plurality of display elements with corresponding optical axes incident to a screen at different points offset from the screen center
In a projection television system having display elements displaying images of respective colors, a screen on which a color image is formed by magnifying and synthesizing the images of the...
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5298984 |
Device for positioning the cathode ray tubes in a projection television system
A cathode ray tube device employed in a projection apparatus for projecting an image on a screen. The cathode ray tube device includes a supporting frame mounted on a rim of a front panel section...
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5293224 |
White balance control system
A quality of blue light projected on a screen is detected. A ratio of the detected quantity of the light to a whole quantity is calculated. The calculated ratio is compared with a reference ratio,...
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5276524 |
Wide display with two CRTs arranged to form a non-overlapping juxtaposed image with one CRT movable from an accommodated position to an operative position
A display device is provide with a main screen, first and second CRTs, and holder mechanism. The first CRT is disposed within a housing of the display device and faces in a vertical direction. The...
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5235173 |
Process for positioning a light beam on a picture area
A method of positioning a light beam on a picture surface relative to a light sensor located on the picture surface includes the step of completely illuminating the sensor with the light beam while...
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5138442 |
Image registration system for multiple picture tube projection television
A projector including a projector to superpose pictures on a screen, the pictures being displayed on cathode ray tubes corresponding to different colors. Reference signals are inputted to the...
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5042908 |
Projection screen device
A projection screen device for a back projection type television system for projecting an image by emitting beams from a projector, comprising, a lenticular sheet having black strips provided on an...
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4982276 |
Focussing adjustment changeover circuit for projection TV receiver
A focus adjustment changeover circuit for a projection display television receiver having red, green and blue-emission CRTs includes a changeover switch for selecting an operating mode in which a...
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4961030 |
Miss convergence compensating device for projection type display
The present invention relates to a miss convergence compensating circuit of a projection type display. The projection type display is provided with three projection tubes for red, green and blue...
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4941036 |
Command sensor in projection display apparatus
A back-projection picture display apparatus which consists of a cabinet including a back-projection screen with a Fresnel lens plate, a video projector unit housed within the cabinet, and a remote...
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4734779 |
Video projection system
A large screen video display system to display bright video images at high resolution comprises an array of video monitors arranged adjacent each other in a compact matrix, for example, an array of...
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4668977 |
Multi-beam projector with dual-beam cathode ray tubes
A multi-beam projector incorporates a cathode ray tube for each of the primary colors red, green and blue, with each cathode ray tube having two electron beams, with all of said electron beams...
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4621281 |
Video image projecting system with separate projecting devices for projecting a background component and sharp contours of an image
The video image projection system of the invention includes two projecting devices formed by cathode ray tubes for projecting a green color onto a projection surface and two other projecting...
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4559469 |
Green emitting phosphor and cathode-ray tube provided with such a phosphor
A green emitting phosphor for heavily loaded cathode-ray tubes comprises a mixture of a deep-green and a yellowish-green emitting phosphor. Mixtures of Zn 2 SiO 4 :Mn and at least one phosphor...
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4518985 |
Projection type green cathode ray tube, method for manufacturing phosphor screen for the same, and projection video device using the same
A projection type green cathode ray tube (CRT) with improved brightness despite an increase in the temperature of the faceplate, a method for manufacturing a phosphor screen adopted therein, and a...
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4456923 |
Color television display device comprising a plurality of picture display tubes
A color television display device comprising a plurality of picture display tubes for displaying a color television signal. In order to eliminate a flicker effect which particularly occurs for...
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4436646 |
Green-emitting phosphor for cathode-ray tube
A green-emitting phosphor for a cathode-ray tube contains calcium sulfide activated by cerium and lithium. Decreases in the brightness when the tube is excited with an electron beam of high current...
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4387390 |
Automatic beam current limiter
An automatic beam current limiting circuit for a color television receiver comprises means for individually monitoring the three cathode currents developed in response to the green, blue and red...
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4318032 |
Convergence circuit including a quadrant separator
A convergence circuit for use in a color television image display system comprising a modulator receiving at one input a first signal at the line frequency of the deflection circuit and at another...
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4306248 |
Full-resolution beam-index multi-color displays
Programmable power supplies are made responsive to beam-index and timing signals in order to automatically control the size and position of the display on a cathode ray tube. The high voltage power...
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4300076 |
Raster-centering circuit for multiple raster CRT systems
In a color projection TV system using three cathode ray tubes (one for each of the primary colors green, red and blue), the vertical deflection coils of all three CRT's are capacitively coupled in...
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