摘要:
A magnetic recording medium in which a hexagonal crystalline system ferromagnetic powder having a specific surface area of 25 to 50 m.sup.2 /g is dispersed in a resinous binder is suitable for high-density recording which is low in noise and is excellent in orientation properties.
摘要:
There is disclosed a magnetic recording medium wherein a magnetic powder is uniformly dispersed in a curable substance of a binder resin material comprising a vinyl chloride-vinyl acetate series resin and/or a polyurethane series resin, at least one of which having a B value in a following apparent viscosity equation:log .eta.a=Bx+log [.eta.]wherein .eta.a is an apparent viscosity (cP) at a temperature of 25.degree. C., x is a resin concentration (wt %(), [.eta.] is a limiting viscosity (cP) at a temperature of 25.degree. C. and B is a constant, of 10 or less, which is measured by dissolving the resin in a mixed solvent of equal weights of methyl ethyl ketone toluene and cyclohexanone; and the B value of the mixed binder resin being 11 or less.The magnetic recording medium of the present invention is the high density recording medium having the great rectangular ratio and excellent in the noise properties.
摘要翻译:公开了一种磁性记录介质,其中磁性粉末均匀分散在包含氯乙烯 - 乙酸乙烯酯系树脂和/或聚氨酯系树脂的粘合剂树脂材料的固化物质中,其中至少一种B值在 以下表观粘度方程:log eta a = Bx + logη其中ηa是在25℃的温度下的表观粘度(cP),x是树脂浓度(wt%(),η是 在25℃的温度下的极限粘度(cP)为B,常数为10以下,通过将树脂溶解在等重量的甲基乙基甲苯和环己酮的混合溶剂中而测定; B 混合粘合剂树脂的值为11以下。本发明的磁记录介质是具有大矩形比和噪声特性优异的高密度记录介质。
摘要:
An LED light emitting device is provided that has high color rendering properties and is excellent color uniformity and, at the same time, can realize even luminescence unattainable by conventional techniques. A phosphor having a composition represented by formula: (Sr2-X-Y-Z-ωBaXMgYMnZEuω)SiO4 wherein x, y, z, and ω are respectively coefficients satisfying 0.1 z, and 0.01
摘要:
A white LED lamp including: a conductive portion; a light emitting diode chip mounted on the conductive portion, for emitting a primary light having a peak wavelength of 360 nm to 420 nm; a transparent resin layer including a first hardened transparent resin, for sealing the light emitting diode chip; and a phosphor layer covering the transparent resin layer, the phosphor layer being formed by dispersing a phosphor powder into a second hardened transparent resin, and the phosphor powder receiving the primary light and radiating a secondary light having a wavelength longer than that of the primary light. An energy of the primary light contained in the radiated secondary light is 0.4 mW/Im or less.
摘要:
In a embodiment, a white LED for a backlight of a liquid crystal display device conforming to the EBU standard includes an ultraviolet (purple) light-emitting element, and a phosphor layer which contains 1 to 10 wt % of a green phosphor including a divalent europium-activated silicate phosphor, 40 to 80 wt % of a blue phosphor including at least one selected from a divalent europium-activated halo-phosphate phosphor and a divalent europium-activated aluminate phosphor, and 10 to 50 wt % of a red phosphor including at least one selected from a europium-activated lanthanum oxysulfide phosphor and a europium-activated yttrium oxysulfide phosphor.
摘要:
An effective technique for detecting several load conditions different in presence or absence and magnitude of load applied to a tool bit is provided in a hand-held tool. A hand-held tool 101 performs a predetermined operation while pressing a tool bit 119 mounted in a front end region of a tool body 103 against a workpiece. A plurality of detecting sensors 161 of different kinds detect several load conditions different in presence or absence and magnitude of load applied to the tool bit 119. The hand-held tool 101 includes at least one of an indicating device 171 which indicates the load conditions based on a result detected by the detecting sensors 161, and a driving control device 135 which controls driving of the tool bit 119 based on the detected result.
摘要:
A white LED lamp including: a conductive portion; a light emitting diode chip mounted on the conductive portion, for emitting a primary light having a peak wavelength of 360 nm to 420 nm; a transparent resin layer including a first hardened transparent resin, for sealing the light emitting diode chip; and a phosphor layer covering the transparent resin layer, the phosphor layer being formed by dispersing a phosphor powder into a second hardened transparent resin, and the phosphor powder receiving the primary light and radiating a secondary light having a wavelength longer than that of the primary light. An energy of the primary light contained in the radiated secondary light is 0.4 mW/lm or less. In the white LED lamp, a backlight, and an illumination device using the white LED lamp an amount of UV light to be contained in the released light and an amount of heat to be generated from the lamp are decreased to be small.
摘要:
A light emitting device 1 includes a light emitting diode, a phosphor layer containing phosphors that emit a visible light by being excited by a light emitted from the light emitting diode, and a reflector disposed to surround the light emitting diode. A portion of 50% or more in an area ratio of a reflecting surface of the reflector is formed as a scattering surface with a mean square inclination (Δq) (0.1 mm) in a range of not less than 0.003 nor more than 0.03.
摘要:
A white light-emitting lamp (1) includes a light-emitting portion (9) which is excited by light emitted from a semiconductor light-emitting element (2) to emit white light. The light-emitting portion (9) contains a blue phosphor, a yellow phosphor and a red phosphor. The yellow phosphor is composed of a europium and manganese-activated alkaline earth silicate phosphor having a composition expressed by (Sr1-x-y-z-u, Bax, Mgy, Euz, Mnu)2SiO4 (0.1≦x≦0.35, 0.025≦y≦0.105, 0.025≦z≦0.25, 0.0005≦u≦0.02).
摘要:
A white light source includes: an insulating substrate; a light-emitting diode chip provided on the insulating substrate and that emits ultraviolet light with a wavelength of 330 nm to 410 nm; and a phosphor layer formed to cover the light-emitting diode chip, including a red emitting phosphor, a green emitting phosphor, and a blue emitting phosphor as a phosphor, and the phosphors are dispersed in a cured transparent resin, wherein when it is assumed that the shortest distance between a surface of the phosphor layer and a peripheral portion of the light-emitting diode chip is t(mm) and the mean free path defined by the following expression (1) is L(mm), the t and L satisfy 3.2≦t/L. [Expression 1] L=1/(n×σ) (1) (n: number of phosphors per unit volume of the phosphor layer (pcs/mm3), and σ: average cross section area of a phosphor in the phosphor layer (mm2)).
摘要翻译:白光源包括:绝缘基板; 设置在绝缘基板上并发射波长为330nm〜410nm的紫外光的发光二极管芯片; 以及形成为覆盖发光二极管芯片的荧光体层,其包括红色发光荧光体,绿色荧光体和作为荧光体的蓝色荧光体,并且将荧光体分散在固化的透明树脂中,其中假定 荧光体层的表面与发光二极管芯片的周边部分之间的最短距离为t(mm),由下式(1)定义的平均自由程是L(mm),t和L 满足3.2≦̸ t / L。 [表达式1] L = 1 /(n×&sgr)(1)(n:荧光体层的每单位体积的荧光体的个数(pcs / mm3)),荧光体的荧光体的平均截面积 层(mm2))。