Abstract:
A light-emitting device which emits light omnidirectionally is provided. A light-emitting device according to the present invention includes: a package which is translucent; an LED provided in a recess in the package; and a sealing member for sealing the LED and packaging the recess; and the recess includes a bottom surface on which the LED is mounted and a side surface surrounding a bottom surface, and light emitted by the LED is transmitted inside the package through the bottom surface and the side surface of the recess and is emitted to outside of the package from the back surface and the side surface of the package.
Abstract:
A light-emitting device including: a base which is translucent; a semiconductor light-emitting element provided on the base; a sealing member for sealing the semiconductor light-emitting element and including a first wavelength conversion material for converting a wavelength of light emitted by the semiconductor light-emitting element to a predetermined wavelength; and a groove provided on a side of the semiconductor light-emitting element, recessed from a top surface of the base on which the semiconductor light-emitting element is provided or a back surface of the base which is a surface opposite to the top surface, and for holding a second wavelength conversion material for converting the wavelength of the light emitted by the semiconductor light-emitting element to the predetermined wavelength.
Abstract:
A light-emitting device capable of effectively dissipating heat generated at an LED is provided. The light-emitting device according to the present invention includes: a base board and an LED chip mounted on the base board. The base board is a translucent base board made of a polycrystalline ceramic. A main region of the base board includes an element mounted region on which the LED chip is mounted, and an average grain size of the polycrystalline ceramic in the main region is between 10 μm and 40 μm inclusive. An end portion region of said base board is a region around an end portion, and an average grain size of the polycrystalline ceramic in the end portion region is preferably smaller than an average grain size of the polycrystalline ceramic in the element mounted region.
Abstract:
A light-emitting device including: a base which is translucent; a semiconductor light-emitting element provided on the base; a sealing member for sealing the semiconductor light-emitting element and including a first wavelength conversion material for converting a wavelength of light emitted by the semiconductor light-emitting element to a predetermined wavelength; and a groove provided on a side of the semiconductor light-emitting element, recessed from a top surface of the base on which the semiconductor light-emitting element is provided or a back surface of the base which is a surface opposite to the top surface, and for holding a second wavelength conversion material for converting the wavelength of the light emitted by the semiconductor light-emitting element to the predetermined wavelength.
Abstract:
A light bulb shaped lamp capable of achieving light-distribution property equivalent to that of a conventional incandescent light bulb and easily fixing the LED module in the lamp is provided. The lamp according to the present invention includes an LED module housed in a hollow globe and a fixing component for fixing the LED module. The LED module includes a translucent board having a first main surface with an LED mounted thereon and a second main surface. The board includes a first light-emitting area and a second light-emitting area, the first light-emitting area in which predetermined light by the LED is emitted from the first main surface toward the globe, and the second light-emitting area in which predetermined light by the LED is emitted from the second main surface toward the globe.
Abstract:
An arc tube (6) of a metal halide lamp (1) has a ceramic envelope (10), a pair of electrodes (16), and metal halides enclosed therein. The arc tube (6) satisfies the relationship EL/Di>4.0, where EL represents the distance between the pair of electrodes (16) in mm, Di represents the maximum inside diameter of the arc tube (6) measured in mm at a portion positionally corresponding to the gap between the pair of electrodes (16). In addition, the metal halides enclosed within the arc tube (6) include at least sodium halide and neodymium halide. With this configuration, the metal halide lamp (1) achieves an improved emission color characteristic, while maintaining high lamp efficiency.
Abstract:
A phosphorescent phosphor having excellent afterglow luminance characteristics, even under low illumination intensity of radiation conditions, compared to conventional strontium aluminate phosphorescent phosphors of the same type, and particularly a phosphorescent phosphor having excellent initial afterglow luminance characteristics and excellent afterglow luminance characteristics at 60 and 90 minutes after cessation of the excitation, with following requirements: 0.015
Abstract translation:与常规的相同类型的锶铝酸盐磷光体磷光体相比,即使在低辐射条件的照明强度下,具有优异的余辉亮度特性的磷光体荧光体,特别是具有优异的初始余辉亮度特性和优异的余辉辉度特性的磷光体荧光体在60和90° 停止激发后几分钟,具有以下要求:<?in-line-formula description =“In-line formula”end =“lead”?> 0.015 <?in-line-formula description =“In-line Formulas”end = 导线“→0.03 <= Ba /(Sr + Ba)<= 0.2和2.1 <= Al /(Sr + Ba + Eu + Dy)<= 2.9 <?在线公式描述=”在线公式 “end =”tail“?>
Abstract:
According to the present invention, there is provided a non-volatile semiconductor memory device including a memory cell array in which a plurality of memory cells are arranged, wherein the memory cells contain two or more types of memory cells, which differs in gate couple ratio. Each memory cell includes source-drain regions provided apart from each other in a semiconductor substrate having a conductivity type, the source-drain regions having a conductivity type opposite to that of the semiconductor substrate, a floating gate provided above a channel region formed between the source-drain regions, and a control gate provided above a surface of the floating gate, and the memory cells contain two or more types of memory cells, which differ in relation to an area of a region in which the floating gate and the control gate overlap. The memory cells having a low gate couple ratio exhibit characteristics similar to those of a mask ROM, which gives priority to reading, whereas the memory cells having a high gate couple ratio, exhibit excellent programming and erasing characteristics.