Matches 201 - 250 out of 322 < 1 2 3 4 5 6 7 >
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4801398 Method of preparing fluorescent material of small particle size  
A fluorescent material of small size is prepared by synthesizing a fluorescent material of predetermined molecular structure in a single phase, pulverizing the fluorescent material thus produced...
4791336 Fluorescent composition and fluorescent luminous device  
A fluorescent composition capable of emitting light of various luminous colors under electron or ultraviolet excitation and a fluorescent luminous device having mounted such a fluorescent...
4770950 Thin film electroluminescent device  
A thin film luminescent device comprises a luminescent layer which consists essentially of a luminous matrix compound of an alkaline earth metal sulfide, a luminescent center element of the rare...
4755324 Thermoluminescent material  
Materials having thermoluminescent properties use a base material and two dopants and made from a process of mixing the parts together, heating the mixture to fuse together, grinding the mass into...
4733088 Radiation detector  
A radiation detector comprises a scintillator capable of emitting light by radiation and a photodetector for detecting the light emitted from the scintillator, the scintillator being composed of a...
4725344 Method of making electroluminescent phosphor films  
An electroluminescent film of an activated alkaline earth metal sulfide phosphor is produced by a method utilizing low temperatures for substrate protection and achieving excellent crystallinity...
4680502 Index type color picture tube  
An index type color picture tube having a stripe type fluorescent screen with strips of a zinc sulfide-based green color phosphor, a zinc sulfide-based blue color phosphor, a red color phosphor...
4651054 Color picture tube  
A color picture tube fitted with a phosphor screen formed of a green-emitting phosphor prepared from copper and aluminum-activated zinc sulfide, a red-emitting phosphor prepared from...
4624861 Rare earth oxysulfide phosphors and processes for creating same  
Rare earth oxysulfide phosphors and processes for creating the phosphors are disclosed. One process involves wet milling a material comprising a rare earth oxysulfide, removing soluble impurities,...
4604550 Display tube with terbium-activated blue-luminescing phosphor screen  
A display tube comprising in an evacuated envelope means to generate at least one electron beam which is focused on a display screen and describes a field thereon, which display screen comprises a...
4568479 Method for preparing phosphor adapted for producing photosensitive layers from an acid slurry  
Prior to preparing an acid phosphor slurry for use in preparing dry photosensitive phosphor layers, particulate yttrium, lanthanum and/or gadolinium oxysulfide or vanadate phosphor is mixed with...
4563297 Fluorescent composition  
A fluorescent composition containing indium oxide and rare earth elements which can emit green, blue or red light under low-velocity electron excitation.
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...
4515827 Method of vapor coating phosphor particles  
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...
4510414 Electron excited fluorescent display device including screen with rare earth phosphor exhibiting sublinear current density-emission luminance characteristics  
A rear earth yellow to red emitting phosphor exhibiting the sublinear characteristics when the current density of an excitation electron beam is increased. The phosphor is represented by the...
4507560 Terbium-activated gadolinium oxysulfide X-ray phosphor  
An improved (Gd 1 -x Tb x ) 2 O 2 S X-ray phosphor, wherein x is from 0.0003 to 0.0045, and persistence causing impurity ions are kept below 5 ppm, exhibits increased brightness in the blue...
4473518 Process for preparing a phosphor  
A process for preparing a rare earth oxide type phosphor comprises compressing a starting mixture composed essentially of a matrix material for said rare earth oxide type phosphor, an activator...
4473488 Process for reclaiming rare-earth metallic oxide and/or rare-earth metallic oxysulfide phosphors  
To a suspension of rare-earth phosphors and sulfidic or selenidic phosphors there is added about 1 to 2% of the amount of hypohalogenite which would be necessary to convert the entire sulfidic or...
4456487 Method for cleaning and annealing a thermoluminescent radiation detector crystal  
A thermoluminescent radiation detector crystal which has been irradiated by ionizing radiation is contacted with an organic solvent at its boiling point prior to read-out of the crystal. The...
4446048 Luminescent materials  
A phosphor for use in fluorescent lamps which comprises calcium sulphate and, optionally, up to 50% of strontium sulphate together with cerium (0.5-10%), manganese (up to 10%), an alkali metal...
4442377 Phosphors  
This invention provides phosphors for use in electroluminescent devices. Each phosphor contains a dopant, selected from the group consisting of europium, erbium, and terbium and at least one of the...
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...
4431922 Mixed phosphors comprising both Gd.sub.2 O.sub.2 S and GdTaO.sub.4 and X-ray screens thereof  
An X-ray phosphor comprising a mixture of gadolinium oxysulfide and gadolinium tantalate, activated with trivalent terbium, is employed in X-ray conversion screens to convert X-rays to visible...
4420444 Process for forming phosphor powder layer  
A phosphor powder layer is formed by a process comprising a step of mixing a phosphor powder with a polymer emulsion and drying the mixture to give the phosphor powder coated with the polymer and a...
4405691 Terbium activated yttrium gadolinium oxysulfide X-ray phosphor and screen containing the same  
An X-ray phosphor consists essentially of (Y,Gd) 2 O 2 S:Tb where the ratio of yttrium to gadolinium is between about 93/7 and 97/3.
4374905 X-Ray intensifying screen  
Improved performance of rare earth oxyhalide phosphors in x-ray image intensifying screens may be realized by admixing a small but effective amount of inorganic salts such as MgSO 4 or ZnSO 4 ...
4374037 Method for preparing divalent-europium-activated calcium sulfide phosphors  
A method for preparing a divalent-europium-activated calcium sulfide phosphor comprising reacting a molten mixture consisting essentially of alkaline-earth-metal chloride and europium chloride with...
4370287 Preform method of synthesizing a phosphor  
To synthesize a particulate phosphor, an intimate dry mixture of phosphor-producing compounds is pressed, as by uniaxial or isostatic pressing, to a self-supporting preform of the desired shape and...
4348299 Method for preparing inorganic sulfides  
Method for preparing an inorganic sulfide material including heating at temperatures between about 800° and 1200° C. a mixture comprising at least one member of the group consisting of oxidic...
4318001 Luminescent materials with increased humidity stability  
Luminescent crystals of the activated rare-earth oxybromide type are coated with a layer of a double salt metal lanthanum sulfate, such as aluminum-lanthanum sulfate or an alkali-lanthanum sulfate,...
4309481 Filter-coated phosphor  
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...
4307320 Pigment coated phosphor and high contrast color television cathode ray tube using same  
Pigment coated phosphors comprising a europium activated yttrium oxysulfide phosphor having a europium activator value within a range of 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium...
4275333 Fluorescent compositions and low-velocity electron excited fluorescent display devices utilizing the same  
Blue, green, red and yellow emitting fluorescent compositions which emit blue, green, red and yellow light of high luminance under low-velocity electron excitation occurring under acceleration...
4264677 Red colored phosphor and process for preparing the same  
An europium activated oxysulfide phosphor represented by the formula Ln 2 O 2 S:Eu,(Sm) wherein Ln is at least one element selected from the group consisting of yttrium, gadolinium, lanthanum,...
4211813 Photoluminescent textile materials  
Sheet materials are provided which are photoluminescent by virtue of their coating. These sheet materials comprise a textile or other flexible sheet material substrate to which adheres a coating...
4209567 Red pigment-coated phosphor and method of producing the same  
A red emitting phosphor having a low luminous reflectance, comprising a rare earth element-based phosphor body activated by europium and a red pigment coated on the phosphor body, is disclosed, the...
4152483 Pigment coated phosphor and process for manufacturing the same  
On the surface of a phosphor, pigment particles are uniformly adhered by a layer of a gelatin-gum arabic mixture. A process for manufacturing such a pigment coated phosphor includes the steps of...
4151442 Color television cathode ray tube  
A color television cathode ray tube which comprises a phosphor screen formed of (A) a red-emitting phosphor selected from the group consisting of europium-activated rare earth metal oxide and...
4140940 Green emitting fluorescent composition and color television cathode ray tube using the same  
A cubic ZnS:Cu,Al phosphor and a cubic ZnS:Au,Al phosphor is mixed to provide a green emitting phosphor coposition. This composition emits green light having a color which is represented by a color...
4138529 Phosphors and X-ray image converters using the same  
A complex halide phosphor represented by the following composition formula and an X-ray image converter using the same: (Me 1 -f,Mg f )F 2 .aMe' X 2 .bKX'.cMe" SO 4 :dEu 2 +,eTb 3 + wherein...
4129519 Thermo-luminescent material  
A lithium fluoride thermo-luminescent material with increased sensitivity, which comprises crystals or powdery crystallites of lithium fluoride having present therein (A) luminescent center...
4119562 Fluorescent compositions  
Fluorescent compositions which contain zinc oxide and one phosphor selected from the group hereinafter defined in a weight ratio within the range of 1/9 to 9/1, and fluorescent display devices...
4113648 Terbium-activated rare earth oxysulfide phosphors with controlled decay  
Europium and ytterbium when added to terbium-activated rare earth phosphors having either a lanthanum oxysulfide, gadolinium oxysulfide, or yttrium oxysulfide host increase the decay period of the...
4109152 X-Ray intensifying screens  
An X-ray intensifying screen having a high speed and capable of providing good image quality superior in sharpness, granularity and contrast comprising a support having formed thereon a fluorescent...
4107070 Process for improving the properties of oxysulfide phosphor materials  
A process is described for improving the properties of a phosphor material comprising an oxysulfide that has been subjected to grinding, in which the phosphor material is heated while exposed to an...
4105909 Penetration phosphors for display devices  
La 2 O 2 S particles are employed as a carrier host in conjunction with terbium activator ions in a cathodo-luminescent penetration phosphor composition for cathode ray display tubes. A thin...
RE29662 Rare earth activated lanthanum and lutetium oxy-chalcogenide phosphors  
A family of cathodoluminescent phosphors which consist essentially of oxy-chalcogenides of lanthanum and/or lutetium containing, for each mol of phosphor, between 0.0002 and 0.2 mol of dysprosium,...
4081398 Fluorescent compositions  
Fluorescent compositions which contain indium oxide and one phosphor selected from the group hereinafter defined in a weight ratio within the range of 1/9 to 9/1, and fluorescent display devices...
4057507 Europium and samarium activated rare earth oxysulfide phosphor  
Rare earth oxysulfide phosphors consisting essentially of a compound of a general formula, {(Y u Gd 1 -u) 1 -x-y-z Eu x Sm y (Tb 1 -p, Pr p ) z } 2 . O 2 S, wherein 0 ≤ z ≤ 1 × 10 -4 ,...
4021588 Method for preparing filter-coated phosphor particles  
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...
Matches 201 - 250 out of 322 < 1 2 3 4 5 6 7 >