摘要:
The present invention is to provide a phosphor of minimum particle size having an excellent crystallinity and a high brightness higher than conventional crude particles, which is usable for a highly precise display, a highly bright illuminating element or illuminating apparatus, a high speed immunoassay system or the like, i.e. a phosphor having a substantially spherical outer shape, which comprises primary particles having a median diameter D50 in a range of from 0.05 nullm to 1 nullm and secondary particles having a median diameter D50 in a range of from 0.1 nullm to 2 nullm, wherein at least 50 vol % of the total secondary particles has an aspect ratio of at least 0.8 and an internal quantum efficiency is in a range of from 0.8 to 1.
摘要:
A process for producing fine phosphor particles having a high crystallinity, having a small amount of aggregated particles and comprising fine particles, thus capable of forming a homogeneous and dense high brightness fluorescent layer when applied to e.g. a cathode ray tube, a fluorescent lamp or PDP, and having a high purity, a uniform chemical composition and excellent emission properties, at a low cost, is provided. A process for producing a phosphor, which comprises heating droplets of a solution containing metal elements constituting the phosphor to carry out pyrolysis to obtain the phosphor, wherein the above heating is carried out in the coexistence of an additive comprising a metal or a metal compound to carry out the pyrolysis at an average crystal growth rate of at least 0.002 nullm3/sec.
摘要:
A phosphor (A) comprising a host material composed of a compound having a garnet crystal structure represented by the general formula (I): M1aM2bM3cOdnullnull(I) (wherein M1 is a divalent metal element, M2 is a trivalent metal element, M3 is a tetravalent metal element containing at least Si, a is the number of 2.7 to 3.3, b is the number of 1.8 to 2.2, c is the number of 2.7 to 3.3, and d is the number of 11.0 to 13.0), and a luminescent center ion incorporated in the host material; a light emitting device (B) comprising the phosphor as a wavelength conversion material and a semiconductor light emitting element capable of emitting a light in the range of from ultraviolet light to visible light; and a display (C) and a lighting system (D) using the light emitting device (B) as a light source. The above phosphor can be readily produced, and can provide a light emitting device having a high color rendering property.
摘要翻译:包含由具有由通式(I)表示的石榴石晶体结构的化合物构成的主体材料的荧光体(A):M 1 a M b M 3 c O d(I)(其中M 1为 二价金属元素M 2是三价金属元素,M 3是至少含有Si的四价金属元素,a是2.7〜3.3的数量,b是1.8〜2.2的数量,c是 数量为2.7〜3.3,d为11.0〜13.0的数量),发光中心离子结合在主体材料中; 包括作为波长转换材料的荧光体的发光器件(B)和能够发射从紫外光到可见光的范围内的光的半导体发光元件; 以及使用发光装置(B)作为光源的显示器(C)和照明系统(D)。 可以容易地制造上述荧光体,并且可以提供具有高显色性能的发光器件。
摘要:
There are provided color liquid crystal display devices with high color purity of NTSC percentage of at least 80%. A color liquid crystal display device comprises a combination of light shutters utilizing a liquid crystal 7, a color filter 9 having color elements of at least three colors of red, green and blue corresponding to the light shutters, and a backlight 1, 2 for transmission illumination. Under the following definitions: TG(nulln) represents a spectral transmittance at a wavelength nulln nm (a wavelength at every 5 nm in the visible light region of from 380 to 780 nm) by a green pixel of the color filter 9; and I(nulln) a relative emission intensity, normalized by a total emission intensity, at a wavelength nulln nm from the backlight, these satisfy the following conditions (1) to (3): (1) at one wavelength in 500 nm 0.01; (2) in a wavelength region of 610 nm