摘要:
An oxynitride phosphor consisting of a crystal containing at least one or more of Group II elements selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one or more of Group IV elements selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and a rare earth element being an activator R, thereby providing a phosphor which is excited by an excitation light source at an ultraviolet to visible light region and which has a blue green to yellow luminescence color that is wavelength converted.
摘要:
An object of the present invention is to provide a light emitting device which emits light of deep yellowish color with high luminance. The light emitting device of the present invention comprises a light emitting element having a peak emission wavelength shorter than 490 nm, a fluorescent material for wavelength conversion which absorbs light from the light emitting element and emits light of a wavelength longer than that of the light from the light emitting element, and a filter which cuts off a part of a mixed light produced by mixing the light of the light emitting element and the light of the fluorescent material, wherein the light transmitted through the filter has a chromaticity coordinate on the chromaticity diagram according to CIE 1931 plotted in a region defined by a first point (x=0.450, y=0.450), a second point (x=0.250, y=0.650), a third point (x=0.350, y=0.750) and a fourth point (x=0.250, y=0.750) and in the region defined by a closed curve consisting of the monochromatic locus and the purple boundary.
摘要:
A lamp includes a light-emitting body that converts electric energy into light energy and a translucent glass covering the light-emitting body, wherein a phosphor layer is provided on at least inner or outer surface of the translucent glass. The phosphor layer includes a fluorescent material including a first phosphor that at least partially converts energy emitted by an excitation source, which emits ultraviolet having a wavelength of about 365 nm, to a first emission spectrum that is different from the energy, and a second phosphor that at least partially converts the first emission spectrum to a second emission spectrum. Peak wavelengths of the emission spectrum of the first and second phosphors have a relation of complementary colors so that when the light created due to the peak wavelengths of the first and second phosphors are mixed, the resulting light is in the white region.
摘要:
A fluorescent material includes first and second phosphors. The first phosphor is a light-storing phosphor, which is represented by the general formula (M1-a-bEuaQb)Al2O4, wherein M is one type selected from the group consisting of Mg, Ca, Ba, Sr and Zn; Q is one type selected from the group consisting of Pr, Nd, Dy, Er and Ho; a is a number that satisfies 0.0001≦a≦0.5; and b is a number that satisfies 0.010≦b≦0.5. When the fluorescent material is excited for about 15 minutes by ultraviolet irradiation having about 365.0 nm wavelength with an intensity of 0.5 mW/cm2, and the color of the afterglow of the fluorescent material is measured 1 minute and 10 minutes after excitation is terminated, an amount of change between chromaticity measured 1 minute after excitation and that measured 10 minutes is in the range of −0.001≦x≦0.009 and −0.009≦y≦0.006.
摘要翻译:荧光材料包括第一和第二荧光体。 第一荧光体是由通式(M1-a-bEuaQb)Al 2 O 4表示的蓄光荧光体,其中M是选自Mg,Ca,Ba,Sr和Zn中的一种; Q是选自Pr,Nd,Dy,Er和Ho中的一种; a是满足0.0001 <= a <= 0.5的数字; b是满足0.010 <= b <= 0.5的数。 当荧光材料通过具有强度为0.5mW / cm 2的波长约365.0nm的紫外线照射激发大约15分钟时,在激发结束后1分钟和10分钟测量荧光材料的余辉的颜色, 在激发后1分钟测量的色度和测量的10分钟之间的色度之间的变化量在-0.001 <= x <= 0.009和-0.009 <= y <0.006的范围内。
摘要:
The present invention provides a fluorescent material comprising a light-storing first phosphor that at least partially converts energy emitted by an excitation source to a first emission spectrum that is different from the energy, and a second phosphor that at least partially converts the first emission spectrum to a second emission spectrum that is different from the first emission spectrum; a lamp equipped with such a fluorescent material; a light-emitting device that produces a whitish afterglow, comprising such a fluorescent material for converting the emission by an LED chip; and a display unit comprising a display equipped with a plurality of such light-emitting devices.
摘要:
A red phosphor with excellent luminescent characteristics, and a light emitting device that uses this phosphor are provided. The phosphor is a nitride phosphor that is activated by europium, and absorbs light from the near ultraviolet range to the blue range to emit red light. The nitride phosphor has the following general formula, MwAlxSiyBzN((2/3)w+x+(4/3)y+z):Eu2+ where M is at least one element selected from the group consisting of Mg, Ca, Sr and Ba. In the general formula, w, x, y and z fall within the following ranges. 0.056≦w≦9, x=1, 0.056≦y≦18, and 0.0005≦z≦0.5 In addition, the mean particle diameter of the nitride phosphor is preferably not less than 2 μm and not more than 15 μm. Additionally, the light emitting device includes a light source with a first light emission spectrum that emits light from the near ultraviolet range to the blue range, and one or more kinds of phosphors that absorb at least part of the first light emission spectrum and thus emit light with a second light emission spectrum. The aforementioned phosphor can be used as the phosphors.
摘要:
An oxynitride phosphor consisting of a crystal containing at least one or more of Group II elements selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one or more of Group IV elements selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and a rare earth element being an activator R, thereby providing a phosphor which is excited by an excitation light source at an ultraviolet to visible light region and which has a blue green to yellow luminescence color that is wavelength converted.
摘要:
The present invention provides a fluorescent material comprising a light-storing first phosphor that at least partially converts energy emitted by an excitation source to a first emission spectrum that is different from the energy, and a second phosphor that at least partially converts the first emission spectrum to a second emission spectrum that is different from the first emission spectrum; a lamp equipped with such a fluorescent material; a light-emitting device that produces a whitish afterglow, comprising such a fluorescent material for converting the emission by an LED chip; and a display unit comprising a display equipped with a plurality of such light-emitting devices.
摘要:
A light emitting device that emits light of various colors by blending lights emitted by two or more kinds of fluorescent materials which are substantially directly excited by the light emitted by an excitation source having principal emission peak in a range from 250 nm to 500 nm. Each of the fluorescent material is of a direct-transition type.
摘要:
Disclosed a liquid crystal display device including a backlight device including a white-emitting LED device which emits a white light arising from a color mixture created through a combination of a blue-emitting LED, a red-emitting phosphor and a green-emitting phosphor, and a color filter equipping color pixels exhibiting plural colors including a red pixel and formed on a transparent substrate, wherein the white-emitting LED device is enabled to exhibit an emission spectrum having a first peak wavelength falling within a range of 440-470 nm, a second peak wavelength falling within a range of 510-550 nm and a third peak wavelength falling within a range of 630-670 nm, and a red display chromaticity of the liquid crystal display device is confined within a region bounded by lines connecting four points (0.620, 0.280), (0.620, 0.300), (0.680, 0.315) and (0.680, 0.280) based on an xy chromaticity coordinate system.