Abstract: A common electrode driver includes an inverting amplifier including a first resistor, a second resistor, and an operational amplifier, and a resistance ratio adjustment circuit that adjusts, in accordance with a length of one horizontal scan period, a resistance ratio being a ratio of a resistance value of the second resistor to a resistance value of the first resistor. A feedback voltage is provided to one end of the first resistor. The resistance ratio adjustment circuit sets the resistance ratio when second driving is performed, in which a length of one horizontal scan period is a second time longer than a first time, to be smaller than the resistance ratio when first driving is performed, in which a length of one horizontal scan period is the first time.

Abstract: It is provided a surface-treated steel sheet that can be produced without using hexavalent chromium and has excellent sulfide staining resistance and coating secondary adhesion. It is a surface-treated steel sheet having: a Sn plating layer; a metallic Cr layer disposed on the Sn plating layer; and a Cr oxide layer disposed on the metallic Cr layer, on at least one surface of a steel sheet, and the surface-treated steel sheet has a water contact angle of 50° or less and a total atomic ratio of K, Na, Mg, and Ca adsorbed on the surface to Cr of 5% or less.

Abstract: A molten alloy solidification analyzing method of the invention is characterized in that the amount of change in fraction solid is calculated based on the solidification rate of molten alloy and the solidification rate parameter that is a parameter for evaluating the influence of the solidification rate on solidification of the molten alloy, according to the fraction solid. By conducting such a simulation that takes into consideration the supercooling, a highly accurate solidification analysis is relatively easily performed for various molten alloys.

Abstract: A molten alloy solidification analyzing method of the invention is characterized in that the amount of change in fraction solid is calculated based on the solidification rate of molten alloy and the solidification rate parameter that is a parameter for evaluating the influence of the solidification rate on solidification of the molten alloy, according to the fraction solid. By conducting such a simulation that takes into consideration the supercooling, a highly accurate solidification analysis is relatively easily performed for various molten alloys.

Abstract: The present invention relates to an optical fiber recoating device. In the optical fiber recoating device, the bare fiber portion of an optical fiber is recoated by filling a recoating resin into molds made of a transparent or semi-transparent material and curing the recoating resin with light from a resin curing lamp that is provided to one side of either of molds. Furthermore, a reflective coating layer is provided to sides of molds where the resin curing lamp is not located, and the light from the resin curing lamp directly radiate and are reflected to radiate onto the bare fiber portion of optical fiber. As a result, the cost of the device is reduced and resin curing is promoted.

Abstract: The present invention relates to an optical fiber recoating device. In the optical fiber recoating device, the bare fiber portion of an optical fiber is recoated by filling a recoating resin into molds made of a transparent or semi-transparent material and curing the recoating resin with light from a resin curing lamp that is provided to one side of either of molds. Furthermore, a reflective coating layer is provided to sides of molds where the resin curing lamp is not located, and the light from the resin curing lamp directly radiate and are reflected to radiate onto the bare fiber portion of optical fiber. As a result, the cost of the device is reduced and resin curing is promoted.