摘要:
To achieve a light-emitting device emitting light with high brightness, closer to natural light, and less color shift due to a small change in intensity of emitted light, in a light-emitting device including a light source emitting light by driving current and at least one wavelength-converting material absorbing at least part of the light from the light source and emitting light having a different wavelength, the color coordinate x1(17.5) and the color coordinate y1(17.5) of the light emitted at a driving current density of 17.5 A/cm2 and the color coordinate x1(70) and the color coordinate y1(70) of the light emitted at a driving current density of 70 A/cm2 satisfy the following Expressions (D) and (E): −0.006≦x1(17.5)−x1(70)≦0.006 (D), −0.006≦y1(17.5)−y1(70)≦0.006 (E).
摘要:
A method for producing a CASN phosphor which has an emission peak wavelength in a long wavelength range and which is prevented from being reduced in emission peak intensity, a phosphor suitable for use in displays having a NTSC ratio higher than that of conventional one, a composition containing the phosphor, a light-emitting device containing the phosphor, a display, and a lighting system. A method for producing an inorganic compound represented by the following formula from a feedstock in which the amount of Si is greater than one mole and less than 1.14 moles per mole of Al: M1aM2bAlSiX3 (I) where M1 represents an activation element containing at least Eu, M2 represents one or more selected from alkaline-earth metal elements, X represents one or more selected from the group consisting of O and N, and a and b each represent a positive number satisfying the inequalities 0
摘要:
To enhance luminance and color rendering of a light emitting device comprising phosphors as wavelength converting material andat least one semiconductor light emitting device that emits visible light, as said phosphors, are used phosphors which are one or more kinds of phosphors selected from a group consisting of oxides, oxynitrides and nitrides, and are a mixture consisting of two or more kinds of phosphors whose luminous efficiency is 35% or higher when excited by the visible light from said semiconductor light emitting device at room temperature. In addition, said mixture contains a first phosphor, and a second phosphor that is different from said first phosphor and capable of absorbing emitted light from said first phosphor, and said first phosphor is contained 85 weight % or more of said mixture of phosphors.
摘要:
To achieve a light-emitting device emitting light with high brightness, closer to natural light, and less color shift due to a small change in intensity of emitted light, in a light-emitting device including a light source emitting light by driving current and at least one wavelength-converting material absorbing at least part of the light from the light source and emitting light having a different wavelength, the color coordinate x1(17.5) and the color coordinate y1(17.5) of the light emitted at a driving current density of 17.5 A/cm2 and the color coordinate x1(70) and the color coordinate y1(70) of the light emitted at a driving current density of 70 A/cm2 satisfy the following Expressions (D) and (E): −0.006≦x1(17.5)−x1(70)≦0.006 (D), −0.006≦y1(70)−y1(70)≦0.006 (E).
摘要:
To provide a blue composition for a color filter which realizes an image with a high color purity, a color filter and a color image display device.A color image display device comprising a combination of light bulbs, a color filter having color elements of at least three colors of red, green and blue corresponding to the light bulbs, and a backlight for transmission illumination, wherein the backlight contains a LED in its structure, and under the following definitions: λn nm represents a wavelength at every interval of 5 nm in the visible light range of from 380 to 780 nm; TR(λn) a spectral transmittance (%) at a wavelength λn nm by a red pixel of the color filter; and I(λn) a relative emission intensity, normalized by a total emission intensity, at a wavelength λn nm from the backlight, these satisfy the following condition (1): I(620-680)×TR(620-680)≧1.1 (1)
摘要:
A trivalent metal phosphate phosphor having a composition of the formula:(Ln.sub.1-x Ln'.sub.x).sub.3 PO.sub.7 (I)wherein Ln is at least one member selected from the group consisting of yttrium, lanthanum, gadolinium and lutetium, Ln' is at least one member selected from the group consisting of terbium, cerium, europium, praseodymium, samarium, dysprosium, erbium, thulium and holmium, and x is a number satisfying 0.0001.ltoreq.x.ltoreq.0.5.
摘要:
To achieve a light-emitting device emitting light with high brightness, closer to natural light, and less color shift due to a small change in intensity of emitted light, in a light-emitting device including a light source emitting light by driving current and at least one wavelength-converting material absorbing at least part of the light from the light source and emitting light having a different wavelength, the color coordinate x1(17.5) and the color coordinate y1(17.5) of the light emitted at a driving current density of 17.5 A/cm2 and the color coordinate x1(70) and the color coordinate y1(70) of the light emitted at a driving current density of 70 A/cm2 satisfy the following Expressions (D) and (E): −0.006≦x1(17.5)−x1(70)≦0.006 (D), −0.006≦y1(17.5)−y1(70)≦0.006 (E).
摘要:
To provide an alkaline-earth metal halogen phosphor that has high luminescent characteristics even when used with an excitation light source that emits light of the near-ultraviolet region, a phosphor-containing composition and a light emitting device using the phosphor, and a display and an illuminating device using the light emitting device,the phosphor of the present invention has a chemical composition represented by the formula (1) below and an external quantum efficiency, when excited with light of 400-nm wavelength, of 77% or higher. (Sr10-x-y-zMxEuyMnz)(PO4)6(Cl1-aQa)2 (1) (In the above formula (1), “M” represents at least one kind of element selected from the group consisting of Ba, Ca, Mg, and Zn, “Q” represents at least one kind of element selected from the group consisting of F, Br, and I, and each of “x”, “y”, “z”, and “a” represents a number satisfying the following requirements: 0≦x
摘要翻译:即使当与发出近紫外区域的光的激发光源一起使用时,也提供具有高发光特性的碱土金属卤素荧光体,含荧光体的组合物和使用该荧光体的发光元件,以及显示器和 使用该发光装置的照明装置,当以400nm波长的光激发时,本发明的荧光体具有由下式(1)表示的化学组成和77%以上的外部量子效率。 (Sr10-xy-zMxEuyMnz)(PO4)6(Cl1-aQa)2(1)(在上述式(1)中,“M”表示选自Ba,Ca,Mg Zn,“Q”表示选自F,Br,I中的至少一种元素,“x”,“y”,“z”分别表示满足 以下要求:0&nlE; x <10,0.3&nlE; y&nlE; 1.5,0&nlE; z&nlE; 3,0和nlE; a&nlE; 1和x + y + z&nlE; 10)
摘要:
The invention relates to a blue composition for a color filter to realize an image having a high color purity corresponding to the emission wavelength of an improved LED backlight, a color filter and a color image display device.
摘要:
To attain a high color reproducibility as a whole image without impairing the brightness of the entire image.A color image display device comprising a combination of light shutters, a color filter having color elements of at least three colors of red, green and blue corresponding to the light shutters, and a backlight for transmission illumination, wherein a light source to be used for the backlight comprises a combination of a blue or deep blue LED and a phosphor, and the relationship between the NTSC ratio W as a color reproduction range of the color image display element and the light use efficiency Y is represented Y≧0.38W+51 (wherein W≧87).