34results about "Cathode heaters manufacture" patented technology

A method of fabricating an electron source includes the steps of fixing a first sealing member to a substrate disposed with an electroconductive member, the first sealing member surrounding the electroconductive member excepting a portion of the electroconductive member, abutting a chamber on the first sealing member to cover the electroconductive member excepting the portion of the electroconductive member and form a hermetically sealed atmosphere between the substrate and the chamber, supplying power to the portion of the electroconductive member to give part of the electroconductive member covered with the chamber an electron-emitting function, and removing the chamber from the substrate.

A PDP with superior light-emitting characteristics and color reproduction is achieved by setting the chromaticity coordinate y (the CIE color specification) of light to 0.08 or less, more preferably to 0.07 or less, or 0.06 or less, enabling the color temperature of light to be set to 7,000K or more, and further to 8,000K or more, 9,000K or more, or 10,000K or more. The PDP is manufactured by a method in which the processes for heating the fluorescent substances such as the fluorescent substance baking, sealing material temporary baking, bonding, and exhausting processes are performed in the dry gas atmosphere, or in an atmosphere in which a dry gas is circulated at a pressure lower than the atmospheric pressure. This PDP is also manufactured by: a method in which after the front and back panels are bonded together, the exhausting process for exhausting gas from the inner space between panels is started while the panels are not cooled to room temperature; or a method in which after the front and back panels are temporarily baked, the process for bonding the panels is started while the panels are not cooled to room temperature. This reduces the time and energy required for heating, resulting in reduction of manufacturing cost.

The present invention discloses a cathode ray tube including an electron gun having a heater and a method for manufacturing the same. The heater is formed using a coil and includes a heat-emitting part having a heat-focusing part on which heat generated from the coil is focused and a buffering part for buffering shocks, and a triple coil part formed such that the coil is wound in three levels at predetermined pitches. The pitches of second and third levels of the triple coil part are substantially identical to each other and larger than the pitch of the first level. The present invention can improve the quality and welding reliability of the heater and reduce the quantity of coil required and time required for winding the coil while accomplishing high efficiency heating.

The invention relates to a method for manufacturing a lamp filament of a self-rectifying mercury lamp. The method includes the steps of winding, first sizing, cutting, second sizing and melting a core filament. The lamp filament of the self-rectifying mercury lamp is eventually manufactured and obtained through the steps. Compared with the prior art, filament feet at the two ends of the lamp filament manufactured by adopting the method are firmer, so that the filament is not prone to being broken, and the service life of the lamp filament is greatly prolonged.

The invention provides a new method for producing a cathode component for a flashlight. The method comprises the following steps of: carrying out calcining, ball milling and sieving on powdered raw materials, uniformly mixing the powdered raw materials with a thermoplastic or thermoset organic matter under the heating state, preparing the mixture into a green body having a certain shape by adopting the metal injection molding process, removing the organic matter in the green body through a chemical or heating method, obtaining a cathode basal body with certain porosity through high-temperature sintering, immersing an electron emission substance in a gap on the cathode basal body, and finally obtaining the cathode component for the flashlight through surface cleaning, washing and high-temperature treatment. The method has the advantage of preparing the cathode basal body material with considerably uniform density, controllable porosity and pore diameters, uniform pore diameters and narrow pore diameter distribution, simplifying the process for preparing the cathode component for the flashlight, reducing the production cost, and achieving volume production, low cost and considerablycomplex production shapes.

The invention discloses a coreless winding method of a coiled-coil filament. In the process of secondary winding of the filament, the coreless winding process is adopted, and two-pass molybdenum wires acting as core wires, a coiled-coil filament winding machine and a shearer are not used any more, but the automatic core pulling operation of a coreless filament winding machine is directly used forwinding. The method has the following beneficial effects: the process is easy to operate, the usage amount of the rare metal molybdenum for filament production is greatly reduced, and complex equipment is simultaneously reduced, thus reducing the production procedures and saving the raw materials; and in addition, the wastewater discharge is reduced, the disposal costs for environmental protection in the process of production is reduced, and at the same time, the production speed and the product quality are improved.

A tungsten wire containing 1 to 10% by mass of rhenium has a point which indicates a 2% elongation within a quadrangle formed by joining points with straight lines, where the values of x and y are point (20, 75), point (20, 87), point (90, 75), and point (90, 58), in this order, wherein the wire diameter of the aforementioned tungsten wire is represented by x μm, and the elongation of the tungsten wire is 2% after electrically heating with an electrical current which is a ratio of y % to the fusion current (FC) at the wire diameter x μm, and wherein a semi-logarithmic system of coordinates is expressed by a horizontal axis using a logarithmic scale of the aforementioned wire diameter x and a vertical axis using a normal scale of ratio y to the fusion current. According to the above-described configuration, a tungsten wire having a great elongation even under conditions of high temperature can be provided, and the tungsten wire can exhibit an excellent durability when used as component material for constituting cathode heaters and so forth, and the tungsten wire can be manufactured efficiently.