摘要:
The embodiment provides a green light-emitting fluorescent substance having high quantum efficiency and also a light-emitting device comprising that substance so as to less undergo color discrepancies. The fluorescent substance is generally represented by (Sr1−xEux)3−yAl3+zSi13−zO2+uN21−w, and is a kind of the Sr3Al3Si13O2N21 phosphors. This substance also gives an X-ray diffraction pattern having a diffraction peak at 2θ of 15.2 to 15.5° and the half-width thereof is 0.14° or less. Further, the substance emits luminescence having a peak within 490 to 580 nm when excited by light of 250 to 500 nm. The light-emitting device provided by the embodiment comprises that substance in combination with a light-emitting element and a red light-emitting fluorescent substance.
摘要:
A light emitting device according to one embodiment includes: a board; plural first light emitting units each including a first light emitting element and a first fluorescent layer formed on the first light emitting element having a green phosphor; plural second light emitting units each including a second light emitting element and a second fluorescent layer formed on the second light emitting element having a red phosphor; the second fluorescent layers and the first fluorescent layers being separated in a non-contact manner with gas interposed there between; and plural third light emitting units each including a third light emitting element and a resin layer formed on the third light emitting element having neither a green phosphor nor the red phosphor, the third light emitting units being disposed between the first light emitting units and the second light emitting units.
摘要:
According to one embodiment, the luminescent material emits light having an luminescence peak within a wavelength range of 550 to 590 nm when excited with light having an emission peak in a wavelength range of 250 to 520 nm. The luminescent material has a composition represented by the following formula 1. (Sr1-xEux)aSibAlOcNd formula 1 wherein x, a, b, c and d satisfy following condition: 0
摘要:
A light emitting device according to one embodiment includes a light emitting element that emits light having a wavelength of 250 nm to 500 nm and a fluorescent layer that is disposed on the light emitting element. The fluorescent layer includes a phosphor having a composition expressed by the following equation (1) and an average particle diameter of 12 μm or more. (M1−x1Eux1)3−ySi13−zAl3+zO2+uN21−w (1) (In the equation (1), M is an element that is selected from IA group elements, IIA group elements, IIIA group elements, IIIB group elements except Al, rare-earth elements, and IVB group elements. x1, y, z, u, and w satisfy the following relationship. 0
摘要:
The embodiment provides a process for production of an oxynitride fluorescent substance. In the process, a compound represented by the formula: (Sr,Eu)2Si5N8, silicon nitride and aluminum nitride are mixed and then fired in a nitrogen atmosphere under high pressure.
摘要翻译:本实施例提供了制造氮氧化物荧光物质的方法。 在此过程中,将由式(Sr,Eu)2 Si 5 N 8,氮化硅和氮化铝表示的化合物混合,然后在氮气气氛中高压烧制。
摘要:
A porous metal member composed of an alloy at least containing nickel and tungsten is provided. The alloy may contain 50 to 80 wt % of nickel and 20 to 50 wt % of tungsten and may further contain 10 wt % or less of phosphorus and/or 10 wt % or less of boron. Such a porous metal member can be produced by, for example, making a porous base such as a urethane foam be electrically conductive, forming an alloy film containing nickel and tungsten, then removing the porous base from the alloy film, and subsequently reducing the alloy.
摘要:
A power semiconductor device M includes: first and second frames for feeding unipolar power from outside; first and second switching units which are series-connected between the first and second frames; an output frame for outputting AC power which is generated by conduction and shutoff of each switching unit to outside; a connecting wire for electrically connecting at least one pair of the first frame and the first switching unit, the first switching unit and the output frame, the output frame and the second switching unit, and the second switching unit and the second frame; a third frame which is arranged close to the output frame; and a branching wire for electrically connecting the first switching unit or the second switching unit to the third frame, whereby sufficiently suppressing surge voltage which takes place within the module even using an external snubber circuit.
摘要:
An information processor includes: a character recognizing unit; a recognized character feature obtaining unit; a translation deciding unit; a translating unit; a translated result feature obtaining unit; an output deciding unit; an image receiving unit; and an output unit that, wherein the character recognizing unit recognizes a character in character image of the image data received by the image receiving unit, and the recognized character feature obtaining unit, in a case where a picture image other than the character is recognized, obtains a third feature related to a character included in the picture image.
摘要:
A paper document processing apparatus includes: a document image acceptance unit that accepts an image acquired; a document image recording unit that records a document image in a storage; an attribute information acquisition unit that acquires attribute information based on the document image; an acquisition result evaluation unit that evaluates whether an acquisition result of the acquired attribute information is affirmative or negative; a medium output unit that outputs information indicating a scan status of the paper document that is formed on a medium while specifying the document image for which the acquisition result of attribute information is evaluated negative; a medium acceptance unit that accepts the information formed on the medium; and an attribute information reacquisition unit that reacquires the attribute information of the document image by specifying the document image in accordance with the accepted information.
摘要:
An optical disc (100) is provided with a recording region where prescribed clock information (WBL) is preformatted for recording. The clock information is (i) included in a first frequency band that is definable by a first reference frequency (Fstd) (that is impossible for a conventional reproducing device to detect by a detecting method based on a self-correlation) and is (ii) defined by a frequency that is integer times the first frequency.