Abstract: The initial color temperature setting can change when a plasma display panel (PDP) is driven for a long period of time. One cause is due to the non-uniform deterioration of red, green, and blue fluorescent materials due to the ultraviolet rays discharged during operation of the panel. Color temperature correction is performed by setting the numbers of discharge pulses for fluorescent materials in accordance with a discharge pulse number correction curve with respect to the cumulative elapsed driven time of the PDP.

Abstract: The initial color temperature setting can change when a plasma display panel (PDP) is driven for a long period of time. One cause is due to the non-uniform deterioration of red, green, and blue fluorescent materials due to the ultraviolet rays discharged during operation of the panel. Color temperature correction is performed by setting the numbers of discharge pulses for fluorescent materials in accordance with a discharge pulse number correction curve with respect to the cumulative elapsed driven time of the PDP.

Abstract: The initial color temperature setting can change when a plasma display panel (PDP) is driven for a long period of time. One cause is due to the non-uniform deterioration of red, green, and blue fluorescent materials due to the ultraviolet rays discharged during operation of the panel. Color temperature correction is performed by setting the numbers of discharge pulses for fluorescent materials in accordance with a discharge pulse number correction curve with respect to the cumulative elapsed driven time of the PDP.

Abstract: The present invention solves the problem that the color temperature of initial setting is changed, when a PDP is driven for a long period of time, due to the non-uniform deterioration of red, green and blue fluorescent materials that is caused by the ultraviolet rays generated for discharge. Color temperature correction is performed by setting the numbers of discharge pulses for fluorescent materials in accordance with a discharge pulse number correction curve with respect to the cumulative elapsed driven time of a PDP.

Abstract: The present invention solves the problem that the color temperature of initial setting is changed, when a PDP is driven for a long period of time, due to the non-uniform deterioration of red, green and blue fluorescent materials that is caused by the ultraviolet rays generated for discharge. Color temperature correction is performed by setting the numbers of discharge pulses for fluorescent materials in accordance with a discharge pulse number correction curve with respect to the cumulative elapsed driven time of a PDP.

Abstract: The present invention solves the problem that the color temperature of initial setting is changed, when a PDP is driven for a long period of time, due to the non-uniform deterioration of red, green and blue fluorescent materials that is caused by the ultraviolet rays generated for discharge.

Abstract: According to the present invention, an outlet tank and an inlet tank are formed in one end side of a plurality of connecting bodies and the bent portions are formed in other end side of the connecting bodies. The plurality of the connecting bodies is formed by a pair of pressed plates and is laminated to form a predetermined space in which the fin is installed, thus creating a laminated type heat exchanger. The bent portions are formed in a bottom end portion of the connecting body, and in the remaining bottom end portion of the surface, there is formed an extending portion which extends to a side lower than the bottom end portion of the fin. Therefore, even when the condensed water becomes a water drop between the surface of the connecting body and the surface of the fin, the drop does not stay for a long time and is efficiently drained by the extending portion downwardly.

Abstract: According to the present invention, the tube element includes a connecting portion for connecting the pair of core plates at an upstream air side, an extending portion extending from each of the connecting portions of the core plate at the upstream air side and having a fin connecting portion connected to the corrugated fin, and a further upstream end portion of the extending portion located at an upstream side of the fin connecting portion which is located away from the corrugated fin to form a predetermined gap with the corrugated fin so as to communicate with the air passage. The extending portion including the fin connecting portion closes the whole space between the tube elements and the adjacent corrugated fins at the more upstream air side of the refrigerant passage, so that the air entering between the tube elements and the adjacent corrugated fins can be substantially shut off.

Abstract: A plate type heat exchanger has a plurality of tube units and a plurality of corrugated fins. Each of the tube units is formed by a pair of plates, namely a pair of plates are connected to each other by a brazing material at a connecting portion at an outer periphery of the plate and a center rib at a center axis of the plate. The center rib has an enlarged portion at the top end thereof in order to gather the molten brazing material toward the enlarged portion. The brazing at the center rib is started from the enlarged portion. Therefore a brazing defect is prevented from occurring at the top end of the center rib. Since the tube unit is effectively connected by brazing, the tube unit of the present invention has enough anti-pressure strength.

Abstract: High strength low carbon steels having good ultraworkability which comprises 0.01-0.3 wt % of C, below 1.5 wt % of Si, 0.3-2.5 wt % of Mn and the balance of iron and inevitable impurities. In the steel, a low temperature transformation product phase consisting of acicular martensite, bainite or a mixed structure thereof is uniformly dispersed in a ferrite phase in an amount by volume of 15-40%. Wire articles of these steels and methods for making the steels are also disclosed.

Abstract: There are described a high strength steel plate having a low yield ratio and improved strength-elongation balance and stretch flangeability, and a method for producing same, the steel plate containing 0.01-0.2% of C, 0.3-2.5% of Mn and 0.01-1.8% of Si and having a tripple phase of polygonal ferrite, bainite and martensite, the area ratios of the bainite and martensite phases being 4-45% and 1-15%, respectively, and the area ratio of the bainite phase being greater than that of the martensite phase.

Abstract: A cold-rolled high strength steel plate with excellent formability and baking hardenability, has the composition (% by weight) 0.2-0.15% of C, 0.02-0.7% of Mn, 0.01-0.1% of Al and 0.002-0.01% of N, optionally at least one element selected from the group consisting of 0.01-0.8% of Si, 0.01-0.1% of P, 0.0002-0.005% of B and 0.01-0.5% of V, and a microstructure comprising ferrite containing 2-30% of bainite and less than 8% of martensite.The steel plate is produced by hot and cold rolling steel of the defined composition followed by rapidly heating to a temperature between the Ac.sub.1 and Ac.sub.3 transformation points, holding at this temperature for less than 5 minutes, and quenching to a temperature below 500.degree. C. at a cooling rate between 50.degree. and 500.degree. C./sec.

Abstract: A high strength hot rolled steel sheet having excellent flash butt weldability, fatigue characteristic and formability, has a composite structure composed of polygonal ferrite and bainite and containing from 0.01 to 0.15% by weight of C, from 0.01 to 1.5% by weight of Si and from 0.3 to 2.0% by weight of Mn, the rest being Fe and impurities, the areal ratio of the bainite being from 3 to 60%. The steel sheet is suitable as a material for wheel rims or discs for automobiles.

Abstract: The present invention discloses a cold-rolled ultra low carbon steel sheet with improved press-forming properties, which comprises 0.002-0.015% of C, less than 0.006% of N, less than 0.01% of O, less than 0.02% of S, 0.1-0.35% of Mn, 0.01-0.06% of acid-soluble Al, 0.02-0.15% of Ti, and 0.05-0.4% of Cr, and has a value less than 0.8 for the atomic ratio (Ti*/(C+N)) of the total titanium content except titanium of oxide form (Ti*) to the sum of carbon and nitrogen contents, with the balance Fe and incidental impurities. This steel has sufficient values of yield and tensile strengths; is excellent in various properties such as elongation, work hardening index, r value, aging index and Erichsen value; and shows good press-forming properties without any special overaging treatment.

Abstract: A dual phase high strength cold-rolled steel plate, comprising 0.02-0.15 weight % carbon, 1.5-2.5 weight % Mn, less than 0.2 weight % Si, 0.2-1.5 weight % Cr, 0.03-0.15 weight % P, less than 0.06 weight % Al, less than 0.02 weight % S, and the balance iron and unavoidable impurities. The steel according to the present invention permits the low-temperature transformation products to be formed in a greater proportion within a short annealing time to lower the yield ratio and zeroizes the yield point elongation without skin pass rolling. Moreover, the composition is completely free from adverse effects on tensile strength, ductility and galvanizing properties and can provide cold-rolled steel plate suitable for a wide use including motor vehicles.

Abstract: Maraging-steel cylinders for uranium enriching centrifugal separators are made by drawing a blank of maraging-steel into a cylindrical shape, squeezing the drawn blank, and subjecting the squeezed cylinder to aging.