Abstract: In an optical scanning exposure system for manufacturing cathode ray tubes having a faceplate with an inner surface layer of photosensitive material and an adjacent apertured mask wherein the exposure system includes a light source providing a light beam, an angle of incidence deflector means for deflecting the light beam at an angle related to the angle of incidence of an electron beam, means for imaging the light beam, and a means for scanning the light beam in a predetermined fashion over the apertured mask to expose the photosensitive material, a control system having a means for storing information representative of the angle of incidence of a light beam and the rate of scanning of a light beam between a matrix of positional locations on the faceplate, a scan rate means for controlling the rate of horizontal and vertical light beam scanning, an encoder means providing light beam positional information to the storage means, and an angle of incidence control means for activating the angle of incidence defl

Abstract: In an optical scanning apparatus for photolithographic processing of faceplates intended for color cathode ray tubes, a light beam from a source is first deflected through an angle related to a predetermined angle of incidence that an electron beam in an operating tube has with respect to a defined faceplate location, and then the deflection point is imaged onto or in the vicinity of the faceplate. This angle of incidence adjustment is accomplished for each faceplate location as the light beam is scanned over the surface of the faceplate. The light source, which is preferably a laser light source, creates a light beam having a wavelength spectrum which exposes the photosensitive material. The beam is deflected by a pair of orthogonally aligned mirrors which are rotated by galvanometers. Each galvanometer is driven by a current from an electrical control, the current being related to the proper angle of incidence for each faceplate location.

Abstract: In an optical scanning exposure system for manufacturing cathode ray tubes having a faceplate with an inner surface layer of photosensitive material and an adjacent apertured mask wherein the exposure system includes a light source providing a light beam, an angle of incidence deflector means for deflecting the light beam at an angle related to the angle of incidence of an electron beam, means for imaging the light beam, and a means for scanning the light beam in a predetermined fashion over the apertured mask to expose the photosensitive material, a control system having a means for storing information representative of the angle of incidence of a light beam and the rate of scanning of a light beam between a matrix of positional locations on the faceplate, a scan rate means for controlling the rate of horizontal and vertical light beam scanning, an encoder means providing light beam positional information to the storage means, and an angle of incidence control means for activating the angle of incidence defl

Abstract: An improvement in a method of making a luminescent screen structure for a cathode-ray tube is disclosed. The tube has a faceplate panel and an apertured color selection electrode in a predetermined position spaced from the panel. A photosensitive composition is coated on a surface of the panel. The solubility of the composition is altered when exposed to light through the electrode. The improvement comprises sensing the strength of a magnetic field passing through the electrode and adjusting the time and/or intensity of the exposure light as a function of the sensed strength of the magnetic field.

Abstract: An improvement is provided in a cathode ray tube screen exposure device wherein both the intensity and the shaping of the exposure radiation is improved by employing two conjunctive sources of radiant energy. The alpha source is positioned in a substantially superjacent manner relative to a related beta source on a substantially common optical axis. Each source is separately adjustable in a limited arcual manner, during operation of the device, to achieve optimized light output in the form of a conjunctive source of radiant energy of optimized shaping.

Abstract: In the method disclosed, a supporting surface, such as the inner surface of the faceplate of the tube, is coated with a photosensitive polymeric film containing about 5 to 80 weight percent of at least one member of the group consisting of certain diol ethers and diol alkanes. Then the film is exposed to a light image to produce regions of greater solubility and regions of lesser solubility. The film regions of greater solubility are removed, and then the entire faceplate with its regions of less solubility is overcoated with a layer containing particles of screen structure material. The retained film regions and the overcoating thereon are removed leaving the screen structure adherent in the areas of greater solubility. By including a diol ether or diol alkane in the film, the exposure time may be shortened significantly without substantial loss of adherence.

Abstract: A substantially continuous line screen structure pattern is formed in a color television picture tube having an interrupted-aperture shadow mask by applying a photosensitive material to a screen support and projecting light from an extended source through the shadow mask apertures and onto the coated screen support. In a preferred embodiment, the line screen is formed by projecting light from a line source through a shadow mask having a plurality of rows of elongated apertures and onto the coated screen support.

Abstract: In an optical scanning exposure system for manufacturing cathode ray tubes having a faceplate with an inner surface layer of photosensitive material and an adjacent apertured mask wherein the exposure system includes a light source providing a light beam, an angle of incidence deflector means for deflecting the light beam at an angle related to the angle of incidence of an electron beam, means for imaging the light beam, and a means for scanning the light beam in a predetermined fashion over the apertured mask to expose the photosensitive material, a control system having a means for storing information representative of the angle of incidence of a light beam and the rate of scanning of a light beam between a matrix of positional locations on the faceplate, a scan rate means for controlling the rate of horizontal and vertical light beam scanning, an encoder means providing light beam positional information to the storage means, and an angle of incidence control means for activating the angle of incidence defl

Abstract: A method for making a phosphor screen of a black matrix type color picture tube wherein use is made of two light sources, one being placed inside the faceplate of the tube and the other placed outside the faceplate, for carrying out a light exposure operation. An apparatus useful for such light exposure operation is also disclosed.

Abstract: A cathode ray storage tube provided with a storage target having a multiplicity of segments of the collector electrode extending through the dielectric layer of the storage target. These segments comprise glass beads secured together and to a surface of an insulating support plate, a conductive collector electrode coating is applied onto the support plate surface and glass bead segments and then the storage dielectric layer is applied thereover which has proper thickness so that the segments extend above the dielectric thereby providing collector areas for collecting secondary emitted electrons from the dielectric.

Abstract: An exposure method for manufacturing a cathode ray tube for displaying colored pictures and having a display screen comprising a large number of triplets of phosphor lines. During the manufacture of the display screen the phosphor lines are provided on the unexposed areas of a photosensitive layer. In order to obtain good triplets at the edge of the display screen, according to the invention an extra lamp position is used during the exposure.

Abstract: An improved photo-chemically active part of the fluorescent suspension for color TV picture tubes is provided. By adding polyether alcohol of the general formula HOCH.sub.2 [CH.sub.2 OCH.sub.2 ].sub.n CH.sub.2 OH, three production factors are improved: adherence of the luminescent material to the glass, exposure time and reduced cross contamination.

Abstract: An optical scanning apparatus for manufacturing cathode ray tubes having a faceplate with an inner surface layer of photosensitive material and an adjacent apertured mask wherein a light beam from a light source is applied to a deflection device controlled by a control circuit to effect deflection of the light beam at an angle related to the angle of incidence of an electron beam in a cathode ray tube. The deflected light beam is imaged onto the inner surface of the faceplate of the cathode ray tube through the apertured mask, and a device is provided for scanning the deflected light beam over the surface of the faceplate in a predetermined pattern to effect exposure of the photosensitive material in the proper locations for registration with the landing location of an electron beam in the cathode ray tube.

Abstract: In the method of exposing a relatively large number of parallel, spaced apart stripe-like areas on the surface of a photo-sensitive member by directing light against such surface through an original photo-mask having a light-permeable pattern comprised of a relatively small number of parallel, spaced apart transparent stripes of lengths substantially smaller than the length of the areas to be exposed, and by effecting repeated relative scanning movements of the photo-sensitive member and photo-mask in the direction of the transparent stripes and relatively shifting the photo-sensitive member and the photo-mask in the direction transverse to the transparent stripes for each of the relative scanning movements so that, upon the completion of the repeated movements, light passing through the light-permeable pattern of the photo-mask will have scanned the desired relatively large number of stripe-like areas to be exposed on the surface of the photo-sensitive member; the transparent stripes of the original photo-ma

Abstract: This disclosure depicts a novel low cost, high performance color cathode ray tube of the shadow mask type, and methods and apparatus for manufacturing the tube. The tube has a novel envelope, on a faceplate portion of which is corner-suspended a lightweight, non-self-rigid shadow mask. The tube has a variety of features and is especially adapted to be made by manufacturing methods which permit the screened faceplates to be interchanged, each with all others, and the shadow masks to be interchanged, each with all others, with consequent economies in manufacture and enhanced tube performance. This disclosure stresses the structure of masters employed in the making of the screen.

Abstract: A filter layer for intercepting the undesired light passage is interleaved between the panel of a color cathode ray tube and the photosensitive phosphor coating, the photosensitive phosphor coating is backwardly exposed through the filter layer to actinic radiation of the back exposure to form phosphor elements with good adhesion and position.

Abstract: This invention concerns an improvement in manufacturing of color picture tubes wherein photosensitive slurry is applied on the inner surface of a face panel of the tube and dried to form a dried slurry, then a shadow mask is secured to the face panel with a specified gap in between, and ultraviolet rays impinge on the dried slurry layer through a path-refracting lens and apertures of said shadow mask so as to form dots on the inner surface.The improvement lies in provision of a light attenuator to control exposure distribution of the ultraviolet rays closely beneath the shadow mask. With this arrangement, sizes of the dots in the edge part of a screen can be made almost equal irrespective of changes of position of the ultraviolet ray source. Consequently, the dots for the three colors in the edge portion of the screen can be made substantially equal in size, and good color balance throughout the picture screen is obtainable.

Abstract: In the manufacture of a color cathode ray tube equipped with an in-line electron gun for emitting a central electron beam and a pair of side electron beams, the inner surface of a face plate is exposed to make a stripe screen through a shadow mask using a light source and a correction lens. At an exposing stage corresponding to the central beam and at exposing stages corresponding to the pair of side beams a correction lens is commonly used. Relative azimuth of the correction lens between the exposing stage corresponding to the central beam and the exposing stages corresponding to the side beams is different by an angle of 90.degree..

Abstract: The invention comprises a method of buffering rare-earth oxide phosphor slurries to control the pH thereof and thereby retard the formation of undesirable complexes.

Abstract: In the method of fabricating color television picture tubes, it is desirable to photo-expose and develop the exposed portions to define a phosphor matrix pattern. In such techniques an opaque coating may be deposited over the sensitized matrix coating which is to be developed. A periodate containing solution, to which is added a predetermined amount of sodium meta-silicate, is used as the developing solution to remove the sensitized matrix portions, while leaving behind the opaque light absorbing pattern on the screen substrate.

Abstract: The invention discloses a method and apparatus for manufacture of color television picture tubes of the type having a shadow mask with a multiplicity of slots, and more particularly for selectively exposing a light sensitive film uniformly coated over the inner surface of a face-panel in order to form the temporary dots or strips. The exposure light source is rotated in the form of a ring while it is displaced relative to the light sensitive film in the longitudinal direction of the slots in a shadow mask, whereby the spacing in the longitudinal direction between the adjacent exposed areas or light images projected may be advantageously reduced without reducing the spacing in the longitudinal direction between the adjacent slots in the shadow mask; that is, the width of the bridge therebetween, so that the color television picture tubes with excellent brightness and contrast characteristics may be provided without adversely affecting the mechanical strength of the shadow mask.

Abstract: A method of forming a pattern of electron-transmissive apertures in a color selection mask for a color cathode ray tube. The method includes providing an electrically conductive preformed blank comprising a relatively thin aperture-defining layer on a relatively thick substrate layer; establishing a first etchant-resistant structure on the aperture-defining layer; etching through the blank to form preliminary sized and shaped apertures in the aperture-defining layer; establishing a second etchant-resistant structure on the aperture-defining layer; etching the aperture-defining layer forming ultimate apertures in the aperture-defining layer; and stripping the etchant-resistant structure from the aperture-defining layer.

Abstract: Method of manufacturing a display screen for a shadow mask tube by projecting a negative image of the shadow mask on support provided with a first photosensitive layer, removing the unexposed regions by means of a solvent, depositing a second photosensitive layer containing a luminescent material of one color dissolved in a solution which becomes insoluble by exposure but is not attacked by an etchant which affects the first layer, exposing the second layer, and removing the exposed regions of the first layer together with superposed portions of the second layer, by the etchant.

Abstract: A method for making a black matrix type shadow mask color television tube. A shadow mask with standard size apertures is sprayed with a black brushing cellulose lacquer while at the same time drawing air, at high velocities, through the apertures to reduce the size of said apertures. A sufficient quantity of sprayed lacquer is utilized to obtain a 10% reduction in aperture size. The mask is then utilized to coat the tube's screen, i.e. its inside face, with a colloidal graphite paint to form the required adherent black matrix surface on said screen having a plurality of holes therein. The apertures of the shadow mask are then restored to their original size by rinsing the mask in acetone to remove the lacquer coating. The resultant original size apertures of the shadow mask are utilized to form the pattern of phosphor dots on the screen overlapping the holes in the black matrix.

Abstract: This disclosure depicts a novel low cost, high performance color cathode ray tube of the shadow mask type, and methods and apparatus for manufacturing the tube. The tube has a novel envelope on a faceplate portion of which is corner-suspended a lightweight, non-self-rigid shadow mask. The tube has a variety of features and is especially adapted to be made by manufacturing methods which permit the screened faceplates to be interchanged, each with all others, and the shadow masks to be interchanged, each with all others, with consequent economies in manufacture and enhanced tube performance. This disclosure stresses methods of tube manufacture by which the faceplates and masks are rendered respectively interchangeable. This disclosure also stresses photoprinting methods for making masters employed in the screening of the tube faceplates and in mask manufacture, and for making masters employed in the actual screening of faceplates and in the formation of aperture patterns in shadow masks.

Abstract: This invention relates to photopolymerizable compositions comprising an ethylenically unsaturated organic compound and a visible light photosensitizing composition comprising a combination of Mn.sub.2 (C0).sub.10 and a co-catalyst selected from the group consisting of a compound characterized by the formula ##SPC1##Wherein R.sub.1 is --H, --Br, or --CH.sub.3, R.sub.2 is --H or --CH.sub.3, and R.sub.3 is --H or --CH.sub.3 ; cumene; diisopropyl benzene; alkyl mercaptans containing from 10 to 16 carbon atoms; thiourea; and mixtures thereof and to polymerized products thereof. The invention also provides a process for photopolymerizing ethylenically unsaturated organic compounds with visible light in the range of 4,000 to 7,000 angstroms.

Abstract: Method comprises coating a supporting surface with a film consisting essentially of a polymeric photobinder containing light-scattering particles of an organic, insoluble, volatilizable material; exposing the film to a light image developing the film; and adhering particles of screen structure material to the film before or after developing the film.

Abstract: This disclosure depicts a novel low cost, high performance color cathode ray tube of the shadow mask type, and methods and apparatus for manufacturing the tube. The tube has a novel envelope on a faceplate portion of which is corner-suspended a lightweight, non-self-rigid shadow mask. The tube has a variety of features and is especially adapted to be made by manufacturing methods which permit the screened faceplates to be interchanged, each with all others, and the shadow masks to be interchanged, each with all others, with consequent economies in manufacture and enhanced tube performance. This disclosure stresses the structure of and methods of use of masters employed in the making of the mask and screen.

Abstract: This disclosure depicts a novel low cost, high performance color cathode ray tube of the shadow mask type, and methods and apparatus for manufacturing the tube. The tube has a novel envelope on a faceplate portion of which is corner-suspended a lightweight, non-self-rigid shadow mask. The tube has a variety of features and is especially adapted to be made by manufacturing methods which permit the screened faceplates to be interchanged, each with all others, and the shadow masks to be interchanged, each with all others, with consequent economies in manufacture and enhanced tube performance. This disclosure stresses methods of making masters employed in the screening of the tube faceplates and in mask manufacture.

Abstract: A color cathode ray tube provided with a fluorescent screen formed on the inner surface of the face plate of the envelope and comprising a plurality of stripes of phosphor elements, and a shadow mask formed with a plurality of slit apertures corresponding to the stripes of the phosphor element. Said slit apertures are spaced apart by transverse bridge members. Each slit aperture is surrounded by inclined side walls, and the cross-section of each transverse bridge along the longitudinal axis of the slit aperture takes a form of a hexagon having two lateral rising edge portions positioned at about the middle of the thickness of the shadow mask.

Abstract: An electroluminescent screen for a color cathode ray tube of the shadow-mask type having a plurality of light absorbing stripes and elemental light emitting electroluminescent stripes each separated by one of the light absorbing stripes is produced by locating a movable shield plate between a light source and shadow mask, the shield having an opening for limiting the path of light between the light source and the shadow mask. The shield plate is moved so as to move the irradiated area on the shadow mask along the length of rows of apertures of the mask. The light source is gradually inclined synchronously with the moving of the irradiated area on the shadow mask to be kept always substantially parallel to the rows of apertures in the irradiated area. The light source has a substantial longitudinal length and narrow width and moves transversely with respect to that length with predetermined amplitude and frequency during movement of the irradiated area across the mask.

Abstract: In a direct photographic process for preparing a viewing-screen structure for a shadow-mask-type CRT having temperature-compensated mask-mounting means, an inner surface of the panel is coated with a layer of light-hardenable material and then heated above 50.degree.C to dry the layer. While the panel is above 40.degree.C, the layer is exposed to actinic light through the mask of the tube. The temperature-compensating-mounting means for the mask is cooled, as with streams of air, to adjust the spacing between the mask and the inner surface of the panel and to prevent the mask from being twisted on the mounting means. Also the mask may be cooled to prevent doming of the mask.

Abstract: The inner surface of a faceplate panel of a cathode-ray tube is cleaned and then precoated with water-insoluble, organic, polymeric particles, the precoating having a weight of 0.08 to 0.80 and preferably 0.20 to 0.40 mg/cm.sup.2. A subsequently applied phosphor-photobinder coating is exposed to a light image and then developed with a turbulent quantity of aqueous liquid. The phosphor-photobinder coating exhibits improved adherence during the developing step due to the presence of the precoating.

Abstract: In the manufacture of screens for cathode-ray tubes, a substantial part of the screens being covered with a non-reflecting substance, hardened polyvinyl alcohol dots of relatively small diameter should be obtained by exposure via a mask with relatively large holes. Owing to an inadequate gradient of the photosensitive polyvinyl alcohol it is not possible to obtain dots of uniform size. The invention enables well-defined, uniform dots to be obtained by superposing a substance on the photosensitive layer which absorbs the light used during exposure, thereby decomposing into substances which do not or not substantially absorb this light. Thus, the effective gradient of the photosensitive polyvinyl alcohol is increased.

Abstract: A method of forming electron-transmissive apertures in a color selection mask for use in a color cathode ray tube. The method includes providing an electrically conductive preformed blank having a relatively thin aperture-defining layer and a relatively thick substrate layer. Two photoresist layers are deposited in succession on the aperture-defining layer. The first photoresist layer is caused to have an array of aperture elements, said pattern elements having the desired ultimate mask aperture size. The second photoresist layer is caused to have an array of aperture elements which are superimposed over the array of aperture elements in the first photoresist coating and correspondingly distributed, a predetermined group of the said aperture elements being of a smaller size than the desired ultimate mask aperture size. The shadow mask blank is then etched through, using the array of apertures in the second photoresist coating as an etchant mask.

Abstract: The invention provides a process improvement and conjunctive apparatus for facilitating the fabrication of the basic patterned windowed-web portion of a color cathode ray tube screen structure formed in the viewing area of the face panel. In accordance with the invention, additional photo-exposure of the panel is discretely effected to polymerize a defined band of coating confined to the sidewall portion of the panel. The presence of this band subsequently facilitates expeditious removal of extraneous graphite coating from the panel sidewall, from the mask positioning studs embedded therein, and from the terminal sealing edge therearound. Thus, the invention provides desirably bare sidewall-associated surfaces that are free of deleterious particulate matter.

Abstract: A method for preparing a supplemental intensity-correction filter for an exposure lighthouse that is used to print viewing-screen structures for cathode-ray tubes. The method involves printing a screen structure without a supplemental filter, calculating how incremental areas of the light field must be modified at the surface of an optical element of the lighthouse to produce the desired screen structure, and then printing a supplemental filter on that surface having the transmission characteristics necessary to modify the light field as required.

Abstract: An improved process is provided for forming at least one set of elements of a patterned CRT screen disposed in overlay relationship upon an opaquely defined windowed-webbing priorly applied to the interior surface of the tube viewing panel in accordance with an apertured mask. The invention concerns the placement of a reflective medium over the exterior surface of the panel during screen exposure. By this means the exposure radiation traversing the screen and panel is reflected back through the respective windows in the screen structure to augment the polymerization and adherence of the pattern elements.

Abstract: Apparatus for use in a lighthouse station for automatically maintaining the output of the light source at a predetermined level comprises a chamber for supporting a cathode ray tube face panel and a source of actinic energy located in the chamber. An adjustable controller is employed for energizing the source. A light translator in the form of a quartz rod is disposed adjacent the energy source for monitoring its output. A light responsive device, coupled to the light translator, derives a control signal representative of the instantaneous energy level of the light source. Finally, means responsive to the control signal serves to actuate the controller to maintain the output of the source at a predetermined level.

Abstract: A fluorescent screen including a plurality of parallel stripes of three colour phosphors is prepared by projecting light from a linear light source positioned in parallel with the stripes on photosensitive substances coated on the inner surface of the panel through a plurality of stripe shaped perforations of a colour selecting member, each divided into a plurality of slit shaped sections by means of bridges. The linear light source is constituted by reciprocating a point light source in parallel with the stripe shaped perforations.

Abstract: A process for forming a color cathode ray tube screen structure, having means for enhancing the absorption of ambient light and providing improvement in the contrast of the image display involves the deposition of three superimposed substantially continuous window-defining layers of optical filter materials. The primary, secondary and tertiary filter layers have discretely disposed window areas formed therein to expose a pattern of filter areas representing the respective filter materials. The filter windows are of a shaping similar to that of the apertures in a spatially related pattern mask member. Each window exhibits a uniform periphery free of indentations, being so defined by a uniform opaque interstitial encompassment homogeneously made up of the three distinct layers of filter materials.