Abstract: A beam-index type color cathode ray tube device which includes a front panel portion, a screen panel portion which faces the front panel portion, a phosphor screen including a plurality of index phosphor stripes fixed to the inner surface of the screen panel portion and extending at regularly spaced intervals. A porous inorganic layer is fixed on the inner surface of the screen panel portion and extends between each adjoining pair of the index phosphor stripes. A metallic reflecting layer covers the index phosphor stripes and the porous inorganic layer. A plurality of color phosphor stripes is applied to the metallic reflecting layer in a predetermined pattern. A photodetecting portion disposed at the outside of the screen panel portion receives fluorescence from the actuation of the index phosphor stripes.

Abstract: A beam-index type color cathode ray tube device which comprises a color cathode ray tube having a front panel portion and a screen panel portion provided with a phosphor screen shaped rectangularly to include a plurality of color phosphor stripes accompanied with index phosphor on its inner surface facing the front panel portion, a luminescence receiving plate member disposed at the outside of said screen panel portion of receiving fluorescence from the index phosphor and producing secondary fluorescence. The luminescence receiving plate member is shaped to have first and second cut-out side portions which are positioned to be close respectively to two corners of the phosphor screen each including a part of one of the top and bottom ends of the same so as to look toward a central part of the luminescence receiving plate member. A first fluorescence detector is attached to the first cut-out side portion for detecting the secondary fluorescence produced in the luminescence receiving plate member.

Abstract: A color cathode ray tube is disclosed having an envelope including a faceplate with an electrically conductive screen, and a funnel having an electrically conductive film on its inner surface charged to a high electrical potential. An electrically insulative glass shadow mask support assembly is sealed between the faceplate and the funnel has a shelf extending into the envelope for mounting a metallic foil shadow mask in tension adjacent to the screen. The shelf has at least one hole therethrough for receiving electrical conduction means according to the invention. The electrical conduction means includes a center member for insertion into the hole, and contacting means at both extremities for contacting the electrically conductive coating on the funnel, the shadow mask, and the metallic film on the screen.

Abstract: A color image recording apparatus for recording a color image uses a cathode-ray tube having a screen with an inner surface to be bombarded with an electron beam, which is coated in a striped manner with a first fluorescent material for emitting blue and green light and with a second fluorescent material for emitting red light, and its outer surface is provided with a blue filter and a green filter each opposed to a respective portion of the first fluorescent material, and with a red filter opposed to the second fluorescent material. Successive scanning lines are formed on a surface by relatively moving the position of the scanning line on the surface in a direction perpendicular to said scanning direction so that each scanning line is scanned by light from each of the colors.

Abstract: A flat color CRT having a phosphor screen comprises red, green and, blue primary phosphor color stripes arranged at a spacing, and phosphor index stripes arranged in some of the spaces between the phosphor color stripes in a definite relation thereto. A black nonluminescent substance is provided between the phosphor index stripes and positioned at least in the spaces between the phosphor color stripes, and a metallic layer of sufficient thickness formed on the inner side of a tube panel and positioned in a corresponding relationship to the phosphor color stripes.

Abstract: The present invention relates to a cathode ray tube having a black matrix phosphor screen. In the cathode ray tube of the present invention, a film whose main component is oxide film is formed to cover a carbon layer of a black matrix formed on the inner surface of a face plate and a phosphor layer is formed on this film. Consequently, even if the carbon layer is thin, the carbon layer can be prevented from being burned and made white in the baking process so that a black matrix phosphor screen of high definition can be obtained. Thus, it is possible to provide a color cathode ray tube of high definition black matrix type type which is good in quality.

Abstract: A cathode ray tube having a face plate including a fluorescent screen formed on the inner surface of the face plate. A conventional metal backing layer backs up the fluorescent screen. The improvements of the present invention are involved with the composition of the fluorescent material composition which includes fluorescent particles and not less than 0.6 parts by weight of SiO.sub.2 per 100 parts by weight of fluorescent particles in that portion of the material which contacts the face plate, the amount of SiO.sub.2 being insufficient to cause the brightness of the fluorescent particles to deteriorate, and not more than 0.3 parts by weight of SiO.sub.2 per 100 parts by weight of fluorescent particles in that portion of the fluorescent material which faces the metal backing layer.

Abstract: An image display including a viewing screen comprising spaced elemental image areas and a light-absorbing matrix of partially-graphitized carbon black adjacent these areas. The matrix may be made by overcoating a stencil and stencil support with an aqueous slurry of the carbon black, drying the overcoating, and then removing the stencil and overlying overcoating.

Abstract: A flat color CRT wherein a single beam emitted from an electron gun scans the inner surface of a tube wall and which includes a phosphor screen formed on the walls inner surface. The phosphor screen comprises a nonluminescent substance and phosphor index stripes with the substance interposed between the stripes. Red, green, blue primary phosphor color stripes have a sufficient thickness and are arranged repeatedly on the nonluminescent substance at a spacing in a definite relation to the phosphor index stripes.

Abstract: A display tube such as a cathode ray tube or fluorescent display tube which includes a film layer over the phosphor layer, and including a random copolymer with the following chemical structure: ##STR1## wherein R.sub.1, R.sub.3 represent individually H or CH.sub.3 ; R.sub.2 is H; and X is OH. The layer can be formed over the phosphor layer uniformly and thinly by means of a printing process to thereby shorten the manufacturing process and reduce the cost of manufacture.

Abstract: A 2D/3D compatible polarized TV system is described which comprises a 3 color TV camera with pairs of adjacent 3D right and left images in each color. The image pairs are scanned to derive pairs of 3D image signals. These 3D signals are presented as 3 color pixels alternately polarized orthogonally. The display may be viewed without glasses to see a 2D color image with either the right or left images suppressed; or with polarized viewers to see a color 3D image. A method of manufacturing orthogonally oriented polarized color pixels is described utilizing inorganic polarizing dipoles electrostatically aligned in a fusible transparent coating.

Abstract: A CRT comprising a screen support, a luminescent viewing screen on the support, a light-reflective metal layer on the screen, and a particulate layer of carbon particles and preformed silica particles on the metal layer. The particulate layer may be made by spraying a suspension of carbon (amorphous carbon and/or graphite) and silica (less than 0.1-micron size) on the metal layer while it is preheated in the 50.degree. to 75.degree. C. range.

Abstract: Corrosion of an aluminium film on the display screen of a display tube as a result of an electro-chemical reaction between water and aluminium is substantially prevented by providing the aluminium with an aluminium phosphate layer at the area where it adjoins the carbon particles. This may be done by rinsing or spraying the carbon particles with an at most 2% by weight phosphoric acid solution in water prior to or after providing the aluminium film.

Abstract: A faceplate of a cathode ray tube is shown wherein a cathodoluminescent phosphor material 1 is deposited on glass faceplate 2. A metal nitride metal absorbing inhomogeneous film 3, where the metal is aluminum or silicon, is deposited on the back side of the phosphor material 1. To avoid unwanted reflections at the interface between the glass 2 and the phosphor 1, a homogeneous film 4 is optionally deposited on glass plate 2 prior to deposition of the phosphor film 1. Additionally, an anti-reflection coating 5 may also be optionally applied to the exterior of the glass plate 2 to eliminate reflection that would otherwise occur at the air-glass interface.

Abstract: A cathode-ray tube for color display comprises a face plate (1), a picture element layer (10) formed on an inner surface of the face plate and including two or more kinds of picture elements (5, 6 and 7), and a fluorescent material layer (4) formed between the picture element layer and the inner surface of the face plate and having a 10 percent afterglow time less than 50 microseconds. As necessary, a photoabsorptive material layer (2) may be provided in a matrix manner between the fluorescent material layer and the face plate. The picture element layer (10) performs a color display function and the fluorescent material layer (4) performs a communication function by means of a light pen. In case that a communication function by means of a light pen is not required, the step of forming the fluorescent material layer (4) may be omitted.

Abstract: A monochromatic picture tube whose faceplate has a transmittance of 17 to 23% is provided. In order to obtain the same transmittance as described above, black di-iron trioxide is coated on phosphor grains to form a phosphor screen on the faceplate. Therefore, a picture on the screen results in contrast without eyestrain.

Abstract: The red and blue color cathode ray tube phosphors for color television are pigmented with a coating of an aqueous-insoluble silicate-based glass matrix containing pigment particles. When incorporated into a tridot color cathode ray tube, the contrast of the tube is improved. The coated particles are formed by dispersing the particles in a slurry with a silicate, the pigment particles and an optional wetting agent, and evaporating the slurry to dryness. The dried coated particles are then heated in order to insolubilize the glass matrix, and soluble ions are then removed by washing.

Abstract: A cathode ray tube having, a panel portion provided with a phosphor screen on its inner surface, a neck portion provided with an electron gun in its inner space, and a funnel portion combined with the panel portion and the neck portion to provide an envelope, in which the electron beam emitted from the electron gun scans the phosphor screen and produces images, and the images are observed from the beam scanning side of the phosphor screen. In the cathode ray tube a thin metal oxide layer is formed on the beam scanning side of the phosphor screen.

Abstract: Red and blue light emitting members constituting a three color fluorescent screen of a color picture tube comprise a combination of a red phosphor, a blue phosphor and a filter substance of a color different from colors of lights emitted by the red and blue phosphors. As the filter substance is used a purple pigment, for instance.

Abstract: Red cathode ray phosphors are coated with a vapor deposited layer of cadmium selenide in order to achieve controlled color shifts in the light output of the phosphors. Such coated phosphors are especially suited for color television and monitor applications.

Abstract: A cathode ray tube comprises an envelope having a funnel portion with an electrical terminal extending through a wall surface thereof. A faceplate is sealed to the funnel portion and a screen contact assembly provides electrical contact between the electrical terminal and an aluminum coating on an inside surface of the faceplate. The screen contact assembly includes a conductive strip attached at one end to the electrical terminal. At the other end of the strip and attached thereto is a relatively flexible first contact member which is in pressured electrical contact with the aluminum layer on the faceplate. Disposed between the flexible first contact member and the aluminum layer on the faceplate is an oxidized, silver plated NICHROME foil member of high electrical conductivity. Transverse support and lateral stability is provided by a relatively flexible second contact member attached to and forming a part of the screen contact assembly.

Abstract: Highly densed zinc sulfide ceramic materials, which essentially comprise zinc sulfide and alkali metals and/or alkaline earth metals and impurities acting as luminescent center, and which show a high brightness of cathode luminescence under irradiation of electron beam having a low energy, are easily made in the form of the sintered material, by heating the mixture of the said materials in inert or sulfuring atmosphere.

Abstract: Disclosed is a filter-coated phosphor having phosphor particles coated with filter particles formed of pigments of the same color as that of light emitted from the phosphor, the phosphor particles coated with the filter particles being additionally coated with a borate compound. According to this filter-coated phosphor, the filter particles never exfoliate from the surfaces of the phosphor particles in a slurry, satisfactory dispersibility is obtained in the slurry, and the slurry pH is stable. A phosphor screen of a color picture tube obtained with use of the filter-coated phosphor exhibits highly outstanding contrast and luminous efficiency.

Abstract: An image intensifier tube has a light-absorbing electron-permeable layer covering an aluminum film overlying a layer of luminescent material in the anode structure of the tube. The light absorbing layer is silicon or boron, or a compound of silicon or boron, and has a thickness of about one-fourth the average wave length of light which impinges upon the photocathode during operation of the image intensifier tube.

Abstract: A phosphor screen for a post-focusing type color picture tube comprising a faceplate, a phosphor layer on the faceplate, a metal back layer on the phosphor layer and a secondary electron emission suppressing layer on the metal backed phosphor screen, in which the thickness of the metal back layer and the density of the secondary electron emission suppressing layer take particular values for effective suppression of emission of secondary electrons from the phosphor screen.

Abstract: An absorbing coating consisting of three layers sequentially deposited on e aluminized phosphor screen of an electro-optical device such as an image intensifier. The layers are: a transparent dielectric layer with a thickness of about one quarter wavelength of radiation to be absorbed, a thin metal semitransparent layer, and an aluminum oxide protective layer for the thin metal layer. The coating is transparent to electrons bombarding the phosphor, but absorbs radiation which might pass through the photocathode and be reflected from the phosphor aluminum coating back to the photocathode. Such reflected radiation can cause spurious output electrons from the photocathode.

Abstract: An absorbing coating consisting of three layers sequentially deposited on e aluminized phosphor screen of an electro-optical device such as an image intensifier. The layers are: a transparent dielectric layer with a thickness of about one quarter wavelength of radiation to be absorbed, a thin metal semitransparent layer, and an aluminum oxide protective layer for the thin metal layer. The coating is transparent to electrons bombarding the phosphor, but absorbs radiation which might pass through the photocathode and be reflected from the phosphor aluminum coating back to the photocathode. Such reflected radiation can cause spurious output electrons from the photocathode.

Abstract: An image tube equipped with a fluorescent screen comprising a phosphor layer coated on a transparent substrate, a conductive porous substance layer formed on the surface of the phosphor layer, and a conductive solid substance layer formed on the surface of the porous layer. The image tube exhibits improved contrast and brightness.

Abstract: A cathode-ray display panel comprising first and second transparent substrates which constitute an envelope, a transparent electrode arranged on the first transparent substrate, a photoconductive layer arranged on the transparent electrode, a plurality of phosphor members arranged on the photoconductive layer, electrically insulating opaque substances embedded between the phosphor members, at least one cathode electrode for emitting electrons and at least one grid electrode for uniformly distributing the electrons emitted from the cathode electrode onto the phosphor members.

Abstract: This invention relates to light absorbing inhomogeneous films and their use in luminescent display devices such as cathode ray tubes and electroluminescent panels to achieve high contrast ratio and minimal halation effect, and more particularly to an inhomogeneous film having a composition varying continuously from metal oxide to metal, and the method of making same. The metal is selected from the group consisting of tantalum and vanadium.

Abstract: A pigmented phosphor comprises a core of a phosphor particle having a light modifying layer thereon. The light modifying layer is comprised of a co-precipitated mixture of silica or pyrophosphate and a pigment which modifies the light output of the energized phosphor. The phosphor is coated by first preparing an unique pigment stock suspension containing the pigment, water, and a polyacrylamide dispersant. The stock solution is then diluted and phosphor particles are added thereto and the mixture is vigorously stirred. The pH of the mixture can be adjusted to about 5 by the addition of acetic acid and then a small amount of positively charged colloidal silica or pyrophosphate is added. After mixing, the pH is raised to about 9 by the addition of a base or a salt which causes a gel to form and the silica or pyrophosphate and the pigment to co-precipitate out upon the phosphor particles.

Abstract: In a color CRT, the mislanding of electron beams due to thermal effects in the shadow mask is compensated for by means of an electron-absorbing insulating layer on the display screen, which layer has apertures which are in registration with the luminescent regions of the display screen.

Abstract: A method of metallizing a screen with a luminescent layer. The method comprises the following steps: providing a film that can be fired. Blasting parts of the film projecting beyond the luminescent layer with a fine-granular material, metallizing the film, firing the film. The said blasting prevents blisters and chips from forming in the metallization.

Abstract: Method comprises dispersing phosphor particles in a liquid medium and then precipitating filter material on the phosphor particles. The filter-covered phosphor particles are removed from the medium, dried and then heated until the filter material sinters to the surfaces of the phosphor particles as discrete filter particles.

Abstract: Traffic signal apparatus utilizing a cathode ray tube to provide traffic control signals. The incandescent lamps and color filters associated with the conventional traffic control signal are replaced by a cathode ray tube and associated circuitry connected to emit desired traffic control signal colors, such as red, amber, and green. A characteristic traffic information indicium is also displayed on the cathode ray tube along with the color signal. Other signalling effects, such as directional control arrows, are also provided.

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.