34results about "Cathode heaters manufacture" patented technology

An apparatus for manufacturing a liquid crystal display device includes a unitary vacuum processing chamber, upper and lower stages confronting each other at upper and lower spaces inside the vacuum processing chamber to bond a first and second substrates, and a first substrate lifting system formed in the lower stage for lifting the second substrate.

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 for winding. 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 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.

The invention provides a heat emission cathode. The heat emission cathode comprises a U-shaped hot filament, one end of cathode base metal is connected with the center of a U-shaped bottom of the U-shaped hot filament, and the cathode base metal is coated with emission matter. The invention further provides a manufacturing method of the heat emission cathode. The method includes the steps that first, a tungsten-rhenium alloy wire is closely wound on a rectangular core bar, high temperature shaping is conducted, the tungsten-rhenium alloy wire is longitudinally cut off along the core bar after shaping, and accordingly the U-shaped hot filament is obtained; then, one end of tungsten-rhenium alloy foil serving as the cathode base metal is connected with the center of the bottom of the U-shaped hot filament, so that a cathode hot filament component is formed; finally, the cathode base metal is placed in triple carbonate turbid liquid for conducting electrophoresis. According to the heat emission cathode, an applicative hot cathode is provided for certain millimeter wave band ultrahigh frequency electron tubes with special structures or small structural sizes, the nonmagnetic performance of the cathode base metal can be guaranteed, high mechanical strength is achieved, the emitting matter can be evenly coated and can firmly adhere to the base metal, and qualified electron emission capacity is achieved as well.

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.

A method and an apparatus for manufacturing an image displaying apparatus having a display panel. A first substrate of the display panel on which a phosphor exciter is disposed and a second substrate of the display panel on which phosphors emitting light by the phosphor exciter is provided, are prepared under a vacuum atmosphere. Then, the first and the second substrates are carried in a getter processing chamber or bake processing chamber, and getter processing or bake processing is applied thereto under the vacuum atmosphere. After the processing, the first and the second substrates are carried in a seal processing chamber, where the substrates are heat sealed under the vacuum atmosphere. Thus, reduction of vacuum exhaust time and a high vacuum degree in manufacturing an image displaying apparatus is attained and efficiency of manufacturing is improved.

A method for manufacturing a hot cathode fluorescent lamp can ensure or facilitate stable initial luminous intensity and provide improved product life characteristics even when the hot cathode fluorescent lamp employs a glass tube with an outer diameter of less than 7 mmφ. One end of a glass tube can be sealed with a glass bead of a mount structure. The other opening end of the glass tube can be welded with an opening end of an exhaust pipe with bent portions of lead wires being sandwiched between the opening ends of the glass tube and the exhaust pipe. After evacuating a vacuum system that is constituted by the inner spaces of the glass tube and the exhausted pipe communicating with each other, the bent portions of the lead wires which extrude outside the vacuum system can be clamp-connected to power source lines extending from an external power source. The emitter of the filaments can be activated by the generated heat of the filament. After supplying mercury and a rare gas into the glass tube, the glass bead can be sealed, and unnecessary portions of the glass tube, the exhaust pipe, and the lead wires can be removed to complete the hot cathode fluorescent lamp, in accordance with one aspect of the disclosed subject matter.

The invention provides a cathode heater assembly and a preparation method thereof. The preparation method comprises the following steps of cutting a metal sheet with a preset thickness to obtain a rectangular metal strip, and taking the rectangular metal strip as a heater; and welding the heater on the surface of the cathode substrate, wherein the surface is opposite to the emitting surface of thecathode substrate. The cathode heater assembly is simple in structure, the prepared cathode heater assembly is high in yield, short in preheating time, small in size, high in heat efficiency, high inheating temperature, uniform in heating, good in vibration resistance, good in thermal shock resistance, high in reliability and simple in manufacturing method, and is free of short circuit.

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 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 discloses mixed filling powder for a hot filament assembly and a preparation method of the mixed filling powder, and the filling powder can realize rapid heat transfer of the hot filament assembly so as to realize rapid starting of a cathode. The filling powder comprises the following components in parts by weight: 95-105 parts of aluminum oxide powder, 19-21 parts of yttrium oxide powder and 28.5-31.5 parts of tungsten oxide powder.

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.

The invention discloses a left-right-right three-stage helical winding method and a left-right-right three-stage helical winding structure for an energy saving filament. The structure comprises a helical filament body (1), wherein, the filament body (1) consists of a mandrel (2) and a filament secondary winding body (3) which is wound on the periphery of the mandrel (2); the filament secondary winding body (3) consists of a molybdenum core wire (4) and a filament primary winding body (5) which is wound on the periphery of the molybdenum core wire (4); the filament primary winding body (5) consists of a molybdenum core wire (6) and a tungsten filament (7) which is wound on the periphery of the molybdenum core wire (6); the tungsten filament (7) is wound on the molybdenum core wire (6) by means of left screw; the filament primary winding body (5) is wound on the molybdenum core wire (4) by means of right screw; the filament secondary winding body (3) is wound on the mandrel (2) by meansof right screw. The filament adopts the left-right-right three-stage helical winding method and is characterized in difficult distortion, deformation, formation of a ring and so on after filament stretching, thereby the product qualification ratio of lighting tubes is improved; a large number of labors used for repair are reduced; the production cost is greatly reduced.

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.

The invention discloses a right-left-left three-stage helical winding method and a right-left-left three-stage helical winding structure for an energy saving filament. The structure comprises a helical filament body (1), wherein, the filament body (1) consists of a mandrel (2) and a filament secondary winding body (3) which is wound on the periphery of the mandrel (2); the filament secondary winding body (3) consists of a molybdenum core wire (4) and a filament primary winding body (5) which is wound on the periphery of the molybdenum core wire (4); the filament primary winding body (5) consists of a molybdenum core wire (6) and a tungsten filament (7) which is wound on the periphery of the molybdenum core wire (6); the tungsten filament (7) is wound on the molybdenum core wire (6) by means of right screw; the filament primary winding body (5) is wound on the molybdenum core wire (4) by means of left screw; the filament secondary winding body (3) is wound on the mandrel (2) by means ofleft screw. The filament adopts the right-left-left three-stage helical winding method and is characterized in difficult distortion, deformation, formation of a ring and so on after filament stretching, thereby the product qualification ratio of lighting tubes is improved; a large number of labors used for repair are reduced; the production cost is greatly reduced.

The invention provides a composite heater assembly and a preparation method thereof. The method comprises the following steps: mixing insulating powder and metal powder to obtain mixed powder, and enabling the insulating powder and the metal powder to expand and contract synchronously; compacting the mixed powder to obtain a bar; sintering the bar to obtain a green body; turning the green body to obtain a composite heater (5); and bonding a cathode cylinder (2) and an electrode (7) to the two ends of the composite heater (5) through welding flux (6), so as to obtain the composite heater assembly. The preparation method disclosed by the invention is simple in process, and the cathode composite heater assembly which is high in reliability, small in size, high in efficiency, uniform in heating and free of a magnetic field can be prepared.