Abstract: An electroluminescent display device comprising an electroluminescent emitting layer including zinc oxide containing a luminescent active material, an insulating layer formed on one surface of the electroluminescent emitting layer and a pair of energizing means for applying signal voltages corresponding to an information to be displayed to a multilayer assembly including the said two layers, characterized in that a plurality of semiconductor layers each containing at least one chemical compound selected from the group consisting of chemical compounds of the II-VI groups and tin oxide are arranged as one of the energizing means arranged on the side of the electroluminescent emitting layer or between the energizing means arranged on the side of the electroluminescent emitting layer and the electroluminescent emitting layer. This device features that it requires only a reduced drive voltage for image displaying purposes and ensures an increased luminescent brightness.

Abstract: An electroluminescense display device having a emission layer comprising zinc sulfide characterized in that at least one member selected from the group consisting of rare earth elements, manganese, copper, silver, magnesium, aluminum and their halides is contained as an activator, as well as at least one member selected from the group consisting of nitrogen, phosphorus, arsenic and antimony is contained as a coactivator. Said emission layer is formed by sputtering by using, as a target, zinc sulfide containing said activator and coactivator. Said sputtering is conducted in an atmosphere comprising a rare gas or rare gas containing a sulfide gas. The electroluminescence display device of the present invention has a higher brightness than conventional device with a good repeatability.

Abstract: New black color insulator thin films comprising Pr oxide, composite oxides of Pr-Mn, Pr-Ni, Pr-Co or Mn oxide are used to constitute at least one part or all parts of interface film between a phosphor film and a back electrode film of an AC thin film EL panel; and the panel with such a high contrast as 5:1 even at an illumination of 400 lux has been obtained.

Abstract: An electroluminescent element, especially a thin-film electroluminescent element in which the dielectric film layer provided on at least one side of an electroluminor layer is essentially composed of the materials represented by the following compositional formula:x(Ti.sub.1-s A.sub.s O.sub.2) and y(Sr.sub.1-t B.sub.t O)wherein A is at least one member selected from the group consisting of Zr, Hf and Sn, and B is at least one member selected from the group consisting of Mg, Ba and Ca. In the above formula, x+y=100 mol %, 0.ltoreq.s<1, 0.ltoreq.t<1, 40.ltoreq.x.ltoreq.80 mol %, and 20.ltoreq.y.ltoreq.60 mol %, but x and y cannot be equal to each other and also s and t cannot be 0 at the same time.

Abstract: Electroluminescent display device suitable for ac and unipolar pulse voltage operation, and ensuring an increased luminescent brightness and a low driving voltage, comprises a transparent electrically insulating substrate; an electroluminescent layer comprised of zinc sulfide (ZnS) and at least one luminescingly active material; an electrically insulating layer formed on one surface of said electroluminescent layer; and first and second energizing means for applying signal voltages across said electroluminescent layer and said insulating layer corresponding to information to be displayed, wherein said first energizing means is interposed between said transparent substrate and said electroluminescent layer, and includes at least one semiconductive electrode which contacts said electroluminescent layer and is comprised of a semiconductive material containing at least one chemical compound selected from the group consisting of the chemical compounds of Groups II-VI, and wherein said second energizing means is ar

Abstract: The development of a dielectric thin-film which is high (140 MV/cm or above) in product of dielectric constant .epsilon..sub.i and dielectric breakdown field strength E.sub.ib is essential for realizing an EL element which can operate stably at a low voltage. Such dielectric film is also required which can withstand heat treatments at high temperatures above 500.degree. C. and is proof against clouding and in which the electrical breakdown caused by a minute fault produced in the process of film formation is self-healed. A film material which satisfies all of these requirements could be obtained from a TiO.sub.2 -BaO based composition by partially substituting the position of Ti with Sn, Zr or Hf and also partially substituting the position of Ba with Ca or Mg. By using these dielectric films, it is possible to obtain a low-voltage drive thin-film electroluminescent element which are high in production yield and reliability.

Abstract: In a thin film integrated device wherein thin film elements, such as thin film condensers, thin film field effect type transistors and thin film electroluminescent elements, which include insulating films (3, 7, 13, 15, 16) as one of their constitution elements, are formed on an insulating substrate; the insulating films are made of sputtered composite oxide films with at least tantalum and aluminum as major constituents. Since this sputtered composite oxide film has characteristics with a large dielectric constant and a breakdown field intensity and a small leakage current, if it is applied in the thin film elements, their operation characteristics can be increased and their reliability can be remarkably improved.

Abstract: A humidity sensitive device for sensing the humidity of an ambient humidity comprising a humidity sensitive resistor 15 which comprises as main component at least one selected from the group consisting of ZrO.sub.2, TiO.sub.2, Nb.sub.2 O.sub.5 and Ta.sub.2 O.sub.5 and an electric heater 13 applied near and for heating and retaining the humidity sensitive resistor 15 at a temperature above 200.degree. C. The humidity sensitive resistor 15 and a fixed resistor are series connected across an AC voltage source 17, and a voltage across the humidity sensitive resistor 15 or the fixed resistor 16 is rectified by a AC/DC converter and compared with a reference voltage by a comparator, thereby an output responding to humidity in the atmosphere can be measured for a wide range of temperature.

Abstract: Plural number of thermo-plastic organic films having ceramic green layer(s) and a layer to become electrode thereon are laminated, thereby to form laminated body, which is hot-pressed to impregnate the organic film substance into the ceramic green layers and into layers to become electrodes, and then is fired; thereby, the ceramic layers are formed very thin, thereby producing a capacitor of large capacitance per volume.

Abstract: In a thin film electroluminescent element comprising a phosphor thin film, a dielectric thin film disposed on at least one of the surfaces of the phosphor thin film and electrodes for applying a voltage across the thin films, the aforementioned dielectric thin film is formed of a dielectric material expressed by a general formula of AB.sub.2 O.sub.6 (where A represents a divalent metal element and B represents a pentavalent metal element). By employing the dielectric material, the voltage for driving a thin film electroluminescent element can be lowered without decreasing the brightness of the element. Further, by using a composite dielectric thin film in which the dielectric thin film expressed by the aforementioned general formula AB.sub.2 O.sub.6 is laminated with a dielectric thin film which is not susceptible to dielectric breakdown of self-healing type, the composite dielectric thin film is made susceptible to the dielectric breakdown of self-healing type.

Abstract: A multi-functional sensing and measuring system capable of detecting both temperature and humidity is fabricated from a porous metal-oxide ceramic whose dielectric constant varies with temperature and whose electric resistance varies with ambient humidity. The sensing element is connected in series with a resistor and a rectangular pulse voltage is applied across the series combination, and the ambient temperature and humidity are measured simultaneously in terms of (i) the circuit time constant (to measure temperature) of a transient state value and (ii) the steady state value of the voltage across the resistor (to measure humidity).

Abstract: A ceramic luminescent device, in which a luminescent screen of zinc sulfide layer with luminescent impurities is formed on a translucent zinc oxide sintered body, and the luminescent light emitted from said luminescent screen is derived through said zinc oxide body.The device can be constructed in a manner that said luminescent screen is excited either by an electric field or electron beam.

Abstract: A multi-functional sensor capable of sensing the humidity and the concentration of reducing gases in the surrounding atmosphere with a single sensing element of p-type metal-oxide ceramic semiconductor is provided. When the ambient temperature is lower than 150.degree. C., the sensor can detect humidity in terms of variations in ion conduction due to the physical absorption of water by the sensing element, but when the ambient temperature or the temperature of the sensing element is at temperatures between 200.degree. and 600.degree. C., the sensor can detect the presence or concentration of reducing gases in the surrounding atmosphere in terms of variations in electron conduction due to the chemical absorption of gases by the sensing element.

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: A ceramic sensor device is disclosed which comprises a sensing element of a ceramic material and electric conductors for connection to external circuit which are tightly embedded within a ceramic insulating body. The solid state sensor device having an excellent capability to withstand detrimental conditions such as a high temperature, rapid temperature change and mechanical shocks is provided. The sensor is advantageously used as a temperature sensor, a moisture sensor and a gas sensor for detecting oxidizing and reducing gas. Above all, the sensor is suited as a temperature sensor device for detecting temperature of exhaust gas purifying catalyst used in motor vehicles.

Abstract: A humidity detecting resistor porcelain element, with at least one portion of an electrode being made of a resistance heating unit and the electrode serving for the resistance heating unit and humidity detecting element, and a humidity detecting apparatus using the humidity detecting resistor porcelain element. The heating and cleaning operations of the humidity detecting resistor porcelain can be uniformly and efficiently performed, thus ensuring the stable humidity detection. Also, the circuit construction of the humidity detecting apparatus can be simplified. They can be provided for use in the detecting and controlling operations of the various humidities.

Abstract: A temperature.multidot.humidity detecting apparatus which can detect the temperature and humidity with a single element. The temperature.multidot.humidity detecting element of the present invention varies its impedance value with respect to variations in the temperature and humidity, and the temperature.multidot.humidity detecting apparatus is adapted to detect the variations in the temperature.multidot.humidity detecting element impedance to determine the temperature and humidity.

Abstract: A red emission fluorescent display device employing improved SnO.sub.2 :Eu phosphor as a low-energy-electron excitation phosphor. The phosphor is manufactured by the following steps:To a starting material selected from the group consisting of at least one of metallic tin, stannous and stannic halide and stannous sulfate, europium oxide is added in the amount of 5.times.10.sup.-2 to 10 atomic % europium to tin. The mixture is heated and stirred with nitric acid until it becomes dry due to evaporation of the solvent water and unreacted nitric acid, thereby forming a mixed powder of metastannic acid and europium. Then the powder is subjected to heat treatment, causing the metastannic acid to thermally decompose and the europium to diffuse into the stannic oxide matrix.The device exhibts remarkably high luminescence intensity and it is possible to achieve the intensity of 26f.L or more under the E.sub.b of 10 V and the I.sub.b of 1.5 mA/cm.sup.2.

Abstract: A red emission fluorescent display device employing improved SnO.sub.2 :Eu phosphor as a low-energy-electron excitation phosphor. The phosphor is manufactured by the following steps:An aqueous solution of a mixture of europium and at least one material selected from stannous halides and stannous sulfate is prepared. The amount of europium ion is adjusted so that the ratio thereof to tin ions ranges between 5.times.10.sup.-2 and 10 atomic %. The solution is poured into and mixed with a hot aqueous solution including oxalic ions, while the mixed solution is being stirred, to form oxalate coprecipitates of tin and europium. After being dryed the coprecipitate is heated so as to be thermally decomposed and then is subjected to heat treatment at the temperature above that for the thermal decomposition, whereby europium ions are diffused into the stannic oxide matrix.The device exhibits remarkably high luminescence intensity which is satisfactory for practical use.

Abstract: A fluorescent display device comprising at least one phosphor screen composed of a mixture of a SnO.sub.2 :Eu phosphor with at least one of the cathodoluminescent phosphors having emission spectra and exitation properties different from SnO.sub.2 :Eu phosphor. This fluorescent display device emits light of different colors when driven at different voltages and at pulse voltages of different duty cycles. A display apparatus comprises such a fluorescent display device and a driving device with variable output voltage.