Abstract: The present invention is directed to a cathode ray tube (CRT) having a surface with improved antistatic and antiglare properties and to a method for providing such improved properties. In the method of the invention, a solution of an alkoxyilane in a solvent system of an alcohol, chloride ion and water is provided. The solution is applied to the surface of a cathode ray tube to impart antiglare and antistatic properties to the surface. Thereafter, the CRT with the saline applied is cured at an elevated temperature for a period of time sufficient to cause the saline to react and be converted to a siloxane.

Abstract: The present invention is directed to a cathode ray tube (CRT) having a surface with improved antistatic and antiglare properties and to a method for providing such improved properties. In the method of the invention, a solution of a silane selected from a chlorinated silane and an alkoxysilane in a solvent system of on alcohol and chloride ion is provided. The solution is applied to the surface of a cathode ray tube to impart antiglare and antistatic properties to the surface. Thereafter, the CRT with the silane applied is cured at an elevated temperature for a period of time sufficient to cause the silane to react and be converted to a siloxane.

Abstract: A cathode-ray tube includes a face plate having a light transmittance of at most 50% and a reflectivity reduction film formed on the external surface of the face plate to reduce reflectivity of an external light. The reflectivity reduction film is a low refraction index layer formed by using a coating liquid obtained by dispersing and mixing magnesium fluoride superfine particles to a base coating of an alcohol solution containing a silicon alkoxide. The low refraction index layer can be laminated by a high refraction index layer formed by using a coating liquid obtained by dispersing and mixing tantalum oxide fine particles to the same base coating as that of the low refraction index layer.

Abstract: A device for the display or projection of images, which has an external output face covered with an abrasion-resistant and transparent coating, said coating constituted in part of an abrasion-resistant layer formed from at least one material selected from the group consisting of adamantane carbon, Y.sub.2 O.sub.3, and indium-tin oxide implanted with oxygen. A display or projection device can be a television tube designed for the display of high-definition transmissions.

Abstract: A cathode ray tube has a vacuum envelope which includes a faceplate, an optical filter formed on the faceplate, the optical filter including mainly of SiO.sub.2 and containing a coloring material, and a phosphor layer formed on the inner surface of the faceplate. The optical filter includes silicon having a fluorine-containing group and a siloxane bond at least on the surface thereof, and a maximum light absorption wavelength in a range of 400 to 650 nm is in a region of 575.+-.20 nm, and where the transmissivity for the wavelength of 450 nm is T.sub.450, that for 530 nm is T.sub.530, that for 550 nm is T.sub.550, that for 630 nm is T.sub.630, and that for the maximum absorption wavelength is Tmin, the following relationship is established:Tmin.ltoreq.T.sub.550 .ltoreq.T.sub.530,1.ltoreq.T.sub.450 /T.sub.539 .ltoreq.2,1.ltoreq.T.sub.630 /T.sub.530 .ltoreq.2,0.7.ltoreq.T.sub.450 /T.sub.630 .ltoreq.1.43.

Abstract: A color cathode ray tube has a coating film formed over an outer surface of a face plate. The coating film prevents a charge-up phenomenon of the face plate and also has a function for improving a contrast performance of the color cathode ray tube. The coating film is composed of a polymer of silicon alkoxide, translucent conductive particles and plural types of dyes or pigments. The absorption peak of the main absorption band of the coating film is set in the range between the main spectrum wavelength of 570 nm of the green luminescence and the main spectrum wavelength of 610 nm of the red luminescence of the color cathode ray tube. The absorption peak of the sub absorption band of the coating film is in at least one of a first range between a wavelength of 380 nm and a wavelength of 420 nm and a second range between a wavelength of 470 nm and a wavelength of 510 nm.

Abstract: Ultrafine particles of a composite particulate substance composed of two or more types of inorganic oxides, forming a particle structure in which two or more types of inorganic oxides are mutually mixed or an inorganic oxide of one type is contained in an organic oxide of another type, and having an average particle diameter of not more than 0.1 .mu.m, a process for the production of the ultrafine particles, use of the ultrafine particles as a thin film, particularly in an image display face plate and a cathode ray tube, and a process for using the ultrafine particles therefor.

Abstract: A target assembly for a projection cathode ray tube is provided wherein the target member is cooled by convective fluid heat transfer occurring within and around a partially hollow support shaft screw. The target member is a solid block of relatively high, thermally conductive material, such as aluminum, coated with an electron beam sensitive material. The shaft screw also comprises relatively high thermally conductive material, such as copper, and has an internal passage leading from a source of cooling fluid, such as dry air, to a annular array of ports located in a distal portion of the supporting shaft screw. The distal portion of the shaft screw has a flaring cross section for increased heat transfer. A bellows encloses the distal portion forming a passageway so as to cause the cooling fluid to also flow along the external surface of the shaft screw. This arrangement adds to the effective convective heat transfer from the shaft screw to the cooling fluid.

Abstract: A display device comprising a display screen, and an optical film formed on the display screen and having a porous lower layer mainly consisting of TiO.sub.2 and having a porosity of 30% to 75% and an average pore size of 10 nm or less and an upper layer stacked on the lower layer and essentially consisting of a silicon compound having a fluorine-containing group and a siloxane bond. In this display device, the optical film can be easily formed and has a satisfactory anti-reflection effect and satisfactory strength.

Abstract: A cathode ray tube (CRT) having a surface with reduced gloss and reflectivity and a method for providing such reduced gloss and reflectivity. In the method of the invention, a solution of a silane and a saturated hydrocarbon in a solvent system of an alcohol and water is provided. The solution is applied to the surface of a cathode ray tube to impart antiglare properties to the surface. Thereafter, the CRT with the silane applied is cured at an elevated temperature for a period of time sufficient to cause the silane to react and be converted to siloxane.

Abstract: A viewing screen protective shield is set forth removably securable in association with a viewing screen, such as LCR screens, as found in fish finders and the like, which are typically exposed to adverse weather conditions. The protective shield is readily removable and replaceable and include convex peripheral edges to conform the shield to the convex screen with an outwardly extending tab formed outwardly of a single corner of the shield to enhance manual grasping thereof. To enhance securement of the shield to the associated screen, a plurality of transparent adhesive strips may be secured to an interior surface of the shield to enhance securement of the transparent shield to the associated screen.

Abstract: A color cathode ray tube includes an envelope having, a faceplate, light filtering device provided on an outer surface of the faceplate, and a phosphor screen formed on an inner surface of the faceplate. The phosphor screen is composed of red, blue, and green emitting phosphors. The red emitting phosphor is primarily a Y.sub.2 O.sub.3 :Eu phosphor with an Eu activation amount between 3.0 mol % and 9.0 mol % inclusive with respect to a Y.sub.2 O.sub.3 amount as a base material. The light filtering device is provided in front of the faceplate for selectively transmitting light having a maximum absorption wavelength of 575.+-.20 nm in a wavelength range from 400 nm to 650 nm, and satisfies the following relationship: T.sub.min .ltoreq.T.sub.550 .ltoreq.T.sub.530, 1.ltoreq.T.sub.450 /T.sub.530 .ltoreq.2, 1.ltoreq.T.sub.615 /T.sub.530 .ltoreq.2, 0.7.ltoreq.T.sub.450 /T.sub.615 .ltoreq.1.43, T.sub.615 /T.sub.580-600 .gtoreq.1.1, wherein T.sub.450, T.sub.530, T.sub.505, T.sub.615, T.sub.min and T.sub.

Abstract: Disclosed in this invention are a cathode ray tube, especially glare type one, characterized in that a two-layer composite film consisting of a transparent electroconductive film and a protective film formed thereon is coated on the front panel so that surface glossiness thereof as measured by JIS Z-8741 Method 2 will become 80% or above, and a process for producing the cathode ray tube.

Abstract: A cathode-ray tube device for generating a bright light spot is provided, in the path of radiation, a container with a coolant from the cathode-ray tube containing a solution of about 0.5-2.0% by weight of a surfactant selected from the group consisting of sorbitan esters of fatty acids of 12-18 carbons, polyoxyethylene derivatives thereof and ethers of polyoxyethylene in polyethylene glycol 200-300 all of said container in contact with said solution being formed of polymethyl methacrylate and all surfaces of which container are in contact with said solution are provided with a thin layer of silicon dioxide.

Abstract: A high-quality projection cathode ray tube is for projecting the image displayed on a fluorescent surface, as an enlarged image on a screen in front of the fluorescent surface through a projection lens projection lens disposed at a given distance ahead. On the inner surface of a face panel, a multilayer optical interference film including optical thin film layers of alternately superimposed high refractive and low refracte index materials is provided. The outermost surface of the multilayer optical interference film is coated with a film of an inorganic material such as silicon dioxide which is optically transparent and stable with respect to the impact of an electron beam. The thickness of the transparent film is not less than 1.0 .mu.m. Even an electron beam having a high energy which has passed through the gaps of the phosphor layer loses the energy in this protective film.

Abstract: A cathode-ray tube panel, wherein the outer surface (12) of the cathode-ray tube panel (10) is made in the form of a roughened surface (14) having microscopic irregularities and the roughened surface is formed with a thin electrically conductive film (15) made of SnO.sub.2 and Sb.sub.2 O.sub.3, thereby making the panel both antistatic and antireflective.

Abstract: A filter consists of a base made of transparent thermoplastic resin and of a black meshed screen made of such resins as nylon and polyester. The black meshed screen, which is coated with carbon, is heated and pressed against the transparent base to embed it in one side of the base. The base is then heated and deformed into a convex shape so that the side where the black meshed screen is embedded is expanded. The deformed base is cooled while it is kept in the convex shape. As a result, a number of indented portions enclosed by the individual meshes are formed in the base because of a difference in thermal shrinkage coefficient between the base and the meshed screen. When external light is radiated against the filter, the indented portions on the base scatter the light, thus reducing the unwanted glare on the CRT screen. The carbon coated on the meshed screen absorbs incoming external light, further enhancing the glare prevention effect of the filter.

Abstract: An apparatus and method provides for installing an implosion panel on the image-display window of an image-display device. The apparatus includes means for spacing an implosion panel from the image-display window a predetermined distance to provide a cavity therebetween. The periphery of the cavity is sealed and uncured resin is introduced in a controlled manner into the cavity while exhausting the air from the cavity. The apparatus includes means for curing the resin to bond the implosion panel to the image-display window.

Abstract: A glass article useful, for example, as a cathode ray tube screen, has a viewing light path which passes through at least one surface region over which the glass is matted by surface pits whereby unwanted specular reflection from that matted region is reduced. The light path also passes through a surface layer formed over a region of the glass so as to reduce the total light reflection from that region of the glass.

Abstract: Disclosed is an improved color projection TV lens system which provides reduced chromatic aberration and improved chromaticity. These improvements are achieved by incorporating a light absorbing material into at least one lens in the system wherein the lens has a substantially uniform thickness.

Abstract: A panel with an anti-reflective multi-layered film thereon comprises a glass substrate, an electricity collector for leading static electricity which is formed by baking an electric conductive frit paste on the glass substrate, and has a rough surface, an anti-reflective multi-layered film formed on the glass substrate so as to cover at least a portion of the electricity collector and wherein the film includes an inner electric conductive layer to provide antistatic effect, wherein the thickness of the anti-reflective multi-layered film is less than the maximum height of the surface roughness of the electricity collector, and a lead terminal for earth provided on the outermost layer of the anti-reflective film and above the electricity collector, whereby static electricity produced on the glass substrate with the anti-reflective multi-layered film is collected at the electricity collector through the electric conductive layer so that the static electricity is led to the outside through the lead terminal for e

Abstract: A color display is disclosed that has on an inner display surface a periodic pattern of luminescent deposits having a smallest deposit-to-adjacent-deposit pitch "P-D". The display has on an outer surface glare reduction means in the form of an undulating periodic pattern of light-scattering elements whose smallest element-to-adjacent-element pitch "P-E" is significantly less than the pitch "P-D" to avoid moire effects, but significantly greater than the longest wavelength of visible light to minimize diffraction effects. The color display according to the invention may comprise a color cathode ray tube havbing a touch panel on its front surface.

Abstract: A protective screen for a visual display unit (VDU) comprises a filter layer which is operative to protect the operator from electrostatic and electromagnetic fields and from residual radiation of a cathode ray tube (CRT) of the VDU. The VDU comprises a body structure for the CRT and the screen comprises a support frame for the filter layer, an intermediate support between the frame and the body structure of the VDU and a pair of fixing plates which are adjustable both front to back and angularly, for fixing the intermediate support to the upper portion of the body structure independently of the specific form of the body structure. The frame of the screen is also pivoted to the intermediate support to permit the filter layer to be disposed in front of the display surface of the CRT or be swung up to expose the CRT screen.

Abstract: A cathode-ray tube has an electrically conductive film formed over the surface of the panel portion of the tube, a transparent, electrical insulating layer formed on the conductive film and an electrode unit formed on the electrical insulating layer. The electrode unit is connected with a common potential line. A capacitor formed between the anode of the cathode-ray tube and the conductive film and a capacitor formed by the conductive film insulating layer and the electrode unit are electrically in series connection as viewed from a source for the voltage to be applied to the anode.

Abstract: a cathode ray tube comprises an envelope including a faceplate with an inner and outer surface and an antistatic layer covering the outer surface of the faceplate for discharging static charges accumulating in the faceplate. The antistatic layer is formed by using a solution containing an alcoholate of silicon as main constituent. The antistatic layer contains a stabilizing substance for maintaining antistatic characteristics. The antistatic layer also has light filtering characteristics when the layer contains xanthene dye as filtering substance.

Abstract: A color filter comprising a vitreous material including at least one kind of organic compound having visible light absorbing properties, and at least one metallic compound selected from the group consisting of a Ni compound and a Co compound. A given dye can be used in the color filter of this invention as the organic compound. Thus, the hue of the color filter is freely selectable. In addition, high light resistance can be attained by sealing the organic compound in the vitreous material in the presence of the metal compound.

Abstract: Glare-reduction means are disclosed for use on, in or with a transparent visual display panel structure having an inner display surface which comprises a periodic pattern of luminous elements. The glare-reduction means on an outer surface of the panel structure has an irregularly rippled surface whose spatial frequency spectrum exhibits a suppression of spatial frequencies in a predetermined band of frequencies related to the spatial frequencies of the pattern of luminescent elements to prevent or reduce visible interference between the patterns.

Abstract: There are disclosed an image display panel having an antistatic film comprising a SiO.sub.2 coat of transparent and electroconductive properties on the front surface of said panel; the coat containing fine particles of at least one compound selected from electroconductive metal oxides and hygroscopic metal salts; and a process for producing the same.

Abstract: A projection system comprising from the image end a screen, a lens in which a core portion including the lens axis accomplishes a convergence function and in which a peripheral portion including a lens edge thereof accomplishes the divergence function, a convex lens element, a concave lens element and a CRT having a face glass whose inner surface is coated with a phosphor and is so curved to form a fourth lens element with a curvature center within a core portion including the lens axis is disposed on the screen side of the projection system, the curvature radius of each part of the core portion of the fourth lens increasing thereof in accordance with increments of the semi-aperture distance of each part from the lens axis.

Abstract: An eye comfort device for optically adjusting the focal distance for screen viewing of a video display comprising a transparent plate constituting a lens with a diopter vergence value in the range of from 0.4 to 0.8 diopters and preferably from 0.5 to 0.6 diopters. The plate contains a quantity of a UV absorbent rose, magenta or pink tint or colorant sufficient to block at least 80 percent of UV transmissions within the range of from 300 to 360 nm. The preferred plate composition is a substantially transparent organic polymer containing, in addition to the magenta tint, a quantity of a UV absorbent sufficient to block at least 90 percent of UV transmissions below 400 nm.

Abstract: A television picture tube which includes a composite frontal plane comprising a viewing screen which is spherically or aspherically convexly curved relative to the viewer. A convexly curved supplementary plane, preferably made of clear glass, gray glass or machine glass is spaced from the viewing screen by a transparent cast resin layer inserted between the viewing screen and the supplementary pane. The resin layer glues the screen and the pane to one another and has a refraction index which corresponds approximately to that of the supplementary pane and the viewing screen. The supplementary pane is cylindrically curved only about the panes vertical axis and its radius of curvature is significantly larger than the radius of curvature of the viewing screen.

Abstract: The white field uniformity of a projection color TV employing three monochrome cathode ray tubes is improved by matching the center-to-edge luminance gradient of the red-emitting and/or blue-emitting tube to that of the green-emitting tube having an interference filter. In a preferred embodiment, such matching is achieved by applying an optical filter of varying density on the outside surface of the display window of the tube.

Abstract: The variation in center-to-edge luminance gradient along the minor axis of the red-emitting and/or blue-emitting tube having a multilayer interference filter, is reduced by reducing the number of layers in the filter making it easier to match the gradients to that of the green-emitting tube, and thereby improve the white field uniformity of a projection color TV employing three monochrome cathode ray tubes.

Abstract: A projection cathode ray tube which comprises a glass bulb consisting of a funnel portion having a large opening at one side and a small opening at the opposite side, a panel portion which has the inner surface protruded in a convex form toward the interior of the cathode ray tube and which is sealingly attached to the large opening of the funnel portion, and a neck portion receiving therein an electron-gun, which is sealingly attached to the small opening of the funnel portion, wherein the inner surface protruded in a convex form of the panel portion is polished. A sealing surface in the panel portion does not protrude from a useful screen area in the inner surface of the panel portion. At least three reference points may be provided either on the funnel portion or on the panel portion, or on both of them.

Abstract: Inner specular reflection is suppressed in a flat faceplate for use in a color cathode ray tube (CRT) by forming a flat glass faceplate to have an aft, or inner surface characterized by an undefined roughness. By allowing for an aft surface of undefined roughness, a subsequent lapping process is utilized to produce a predetermined roughness of the aft surface that will substantially eliminate specular reflection from that surface.

Abstract: Disclosed is an unsaturated polyester resin composition which comprises an unsaturated polyester having a molecular weight per one unsaturated group of 1000 to 8000 and (1) a polymerizable monomer, a low-temperature hardener and a high-temperature hardener or (2) styrene and/or a derivative thereof and an unsaturated compound having a refractive index of 1.5 or less. This composition can be molded in a short time and forms no strain on hardening and is suitable as an adhesive for production of cathode ray tubes.

Abstract: The invention provides a structure for reducing potentially harmful effects emanating from a video display terminal having a screen on a cathode ray tube. The structure includes a light-transparent first medium proportioned to cover the screen and being of a material capable of absorbing ionizing radiation. An electrically conductive second medium is also proportioned to cover the screen and is sufficiently light transparent to permit normal viewing of visual displays on the screen. The second medium reacts with non-ionizing radiation to dissipate this radiation and a frame is provided to hold the first and second mediums. The frame includes a discharge connection for coupling the second medium to ground to dissipate a charge in use in the second medium.

Abstract: Phosphors used in colour cathode ray tubes, particularly but not exclusively projection television tubes, have colour point standards or chromaticities modified to conform to European Broadcasting Union (EBU) standards by disposing an interference filter in the light-path from the phosphor, for example, between the phosphor and the faceplate, which has a peak gain greater than unity over a selected part of the frequency spectrum. As a result, an efficient broadband phosphor can be employed to obtain the desired chromaticity and thereby increase the white-D luminance of projection television systems.

Abstract: A CRT filter of the present invention consists of a film having a transparent conductive layer and effectively eliminates the static electricity which are generated from the CRT. Further, after the film previously having the transparent conductive layer was continuously manufactured, it can be laminated onto a nonconductive transparent sheet or plate. The transparent conductive film of a stable quality can be cheaply obtained. Thus, the CRT filter having the excellent static electricity eliminating capability and high resolution is manufactured. On the other hand, the CRT filter of the invention has such a shape as to be closely attached onto the front surface of the CRT. Therefore it is also possible to prevent such a phenomenon that the display image in the corner portion of the screen is blurred without deteriorating the resolution. The operator can continue the work without feeling the fatigue of the eyes and the mental pain.

Abstract: In a cathode ray tube, a single layer for prevention of a reflection of light rays is formed on a face plate having a non-spherical outer surface. The thickness of the layer is continuously decreased from the center region toward the peripheral regions of the face plate.

Abstract: A cathode ray tube useful as a transducer for converting electrical signal information into a visual pattern on a recording medium uses a cylindrical envelope along which a signal modulated beam is projected. A fiber optics plate is positioned along the sidewall of the envelope and the beam is swept in a liner scan of the fiber optics plate by an array of electromagnets, positioned along the envelope and properly excited to deflect the beam appropriately. For monitoring the properties of the electron beam, the inner surface of the end plate of the envelope is provided with a patterned coating of luminescent material on which the electron beam is incident when undeflected by the array of electromagnets. Sensors are provided for measuring the flux distribution for monitoring the properties of the electron beam.

Abstract: A privacy screen for a color CRT tube to shield images displayed on the color CRT tube film from observers to the sides of an observer in front of the tube. A first light control film contains a plurality of closely spaced louvers and is located in front of the color CRT tube. The louvers are positioned at a tilt angle relative to a vertical line and at a first direction relative to the vertical line. A second light control film contains a plurality of closely spaced louvers and is located in front of the CRT tube and the first light control film. The louvers of the second film are positioned at a tilt angle relative to the vertical line and at a second direction relative to the vertical line and opposite to the first direction of the louvers of the first film.

Abstract: A lenticular filter for a display device includes lenticulations which are angularily disposed with respect to both of the axes of the display and which completely cover the viewing area.

Abstract: A projection television system comprising an array of three projection television display tubes (14) luminescing in red, green and blue, a focusing lens (16) associated with each tube and a display screen (12) on which the respective optical images are merged to form a single multicolored image. At least one of the display tubes (14) has a multilayer interference filter (46) between the phosphor (30) and the faceplate (20). In order to imprve the light output at the corners of the display screen (12), the cut-off angle of the first filter layers is varied between the center and the corners thereof, for example by increasing the optical thickness of the filter layers relative to the center.

Abstract: Front attachment unit for the cathode ray tube of monitors, television sets or the like, consisting of a sheet of glass, in particular a sheet of gray glass, anti-reflection equipment on the front side and an absorption coating on the rear side, whereby the absorption coating has metallic atoms. The absorption coating is single-layer and made of chromium, a chromium/nickel alloy or silicides. It is anti-statically adjusted and grounded. It is of a thickness which reduces the light transmission compared with a non-coated sheet of glass by approximately a third.

Abstract: An anti-reflection coating which comprises at least a three layer interference filter is evaporated on the external surface of a faceplate panel. The manufacture of the coating can be speeded-up substantially by selecting high and low refractive index materials which can be evaporated at ambient temperatures and subsequently hardened by high temperature annealing outside the evaporation apparatus. The annealing is carried out most conveniently during the standard processing of a cathode ray tube.

Abstract: A projection television receiver comprises at least one cathode ray tube for receiving video signals and projecting images therefrom, the tube including a face; a lens mounted adjacent to the face for focusing the images projected by the tube; and a coolant disposed between the lens and the face for absorbing and dissipating heat from the tube, the coolant means including 1,3-butylene glycol.

Abstract: A computer touch panel filter assembly that absorbs and grounds radiation induced currents. The panel assembly is used in combination with a computer screen having light beams that intersect in front of touchable regions to provide an indication of the location touched when the light beams are interrupted.

Abstract: A multiple tube projection television system. At least two image generating cathode ray tubes are provided, having an image generating surface which is concave. The radius of curvature of the image generating tubes is selected to be between 1.2 and 2 times the image diagonal of each tube. Dichroic mirror means are provided to combine the images produced from each tube. A projection lens system is positioned at an optical distance from each tube which is substantially equal to the radius of curvature of the concave phosphor surface. The combination provides for an optimum amount of light to the entrance aperture of the projection lens system.

Abstract: A projection television system comprising an array of three projection television display tubes (14) luminescing in red, green and blue, a focusing lens (16) associated with each tube and a display screen (12) on which the respective optical images are merged to form a single multicolored image. At least one of the display tubes (14) has a multilayer interference filter (46) between the phosphor (30) and the faceplate (20). In order to imprve the light output at the corners of the display screen (12), the cut-off angle of the first filter layers is varied between the center and the corners thereof, for example by increasing the optical thickness of the filter layers relative to the center.