Abstract:
The present invention relates to a light emitting device comprising at least one light emitting diode which emits light in a predetermined wavelength region, copper-alkaline earth metal based inorganic mixed crystals activated by rare earths, which include copper-alkaline earth silicate phosphors which are disposed around the light emitting diode and absorb a portion of the light emitted from the light emitting diode and to emit light different in wavelength from the absorbed light.
Abstract:
Disclosed are a (Al, Ga, In)N-based compound semiconductor device and a method of fabricating the same. The (Al, Ga, In)N-based compound semiconductor device of the present invention comprises a substrate; a (Al, Ga, In)N-based compound semiconductor layer grown on the substrate; and an electrode formed of at least one material or an alloy thereof selected from the group consisting of Pt, Pd and Au on the (Al, Ga, In)N-based compound semiconductor layer. Further, the method of fabricating the (Al, Ga, In)N-based compound semiconductor device comprises the steps of growing a P layer including P type impurities in a growth chamber; discharging hydrogen and a hydrogen source gas in the growth chamber; lowering the temperature of the (Al, Ga, In)N-based compound semiconductor with the P layer formed thereon to such an extent that it can be withdrawn to the outside from the growth chamber; withdrawing the (Al, Ga, In)N-based compound semiconductor from the growth chamber; and forming an electrode of at least one material or an alloy thereof selected from the group consisting of Pt, Pd and Au on the p layer. According to the present invention, it is possible to sufficiently secure P type conductivity and obtain good ohmic contact characteristics without performing an annealing process. And, no further annealing is necessary when Pt, Pd, Au electrode are used.
Abstract:
A leadframe that is configured to be used with an electronic device, e.g., light emitting diode (LED), includes a heat sink supporting ring for supporting a heat sink. An outer frame is spaced apart from the heat sink supporting ring, and encloses the heat sink supporting ring. At least one supporting lead connects the heat sink supporting ring and the outer frame. A separated lead is extended from the outer frame toward the heat sink supporting ring, and is spaced apart from the heat sink supporting ring. A package body that may be formed by an injection molding after a heat sink is inserted into the leadframe.
Abstract:
A light emitting device is disclosed. The light emitting device may include a light emitting diode (LED) for emitting light and a phosphor adjacent to the LED. The phosphor may be excitable by light emitted by the LED and may include a first compound having a host lattice comprising first ions and oxygen. In one embodiment, the host lattice may include silicon, the copper ions may be divalent copper ions and the first compound may have an Olivin crystal structure, a β-K2SO4 crystal structure, a trigonal Glaserite (K3Na(SO4)2) or monoclinic Merwinite crystal structure, a tetragonal Ackermanite crystal structure, a tetragonal crystal structure or an orthorhombic crystal structure. In another embodiment, the copper ions do not act as luminescent ions upon excitation with the light emitted by the LED.
Abstract translation:公开了一种发光器件。 发光器件可以包括用于发射光的发光二极管(LED)和与LED相邻的磷光体。 磷光体可以由LED发出的光可激发,并且可以包括具有包含第一离子和氧的主晶格的第一化合物。 在一个实施方案中,主晶格可以包括硅,铜离子可以是二价铜离子,并且第一化合物可以具有橄榄石晶体结构,β-K 2 SO 4晶体结构,三角形镓石(K 3 N 3) Na(SO 4 SO 2)2)或单斜晶系的Merwinite晶体结构,四方晶系晶体结构,四方晶系结构或正交晶体结构。 在另一个实施方案中,当由LED发射的光激发时,铜离子不起荧光离子的作用。
Abstract:
Disclosed herein is a light emitting device including at least three light emitting diodes having different peak emission wavelengths to primarily emit light in a blue, green or red wavelength range, and a wavelength-conversion means to convert primary light into secondary light in a visible light wavelength range, The light emitting device of the current invention has a high color temperature of 2,000 to 8,000 K or 10,000 K and a high color rendering index of 90 or more, and emits yellow-green light or orange light having a wide emission wavelength range. Since the light emitting device having high color temperature and excellent color rendering properties can easily realize desired emission on the color coordinate system, it is applicable to mobile phones, notebook computers, and keypads or backlight units for various electronic products, and in particular, automobiles and exterior and interior lighting fixtures.
Abstract:
A suspended semiconductor film is anchored to a substrate at at least two opposed anchor positions, and film segments are deposited on the semiconductor film adjacent to one or more of the anchor positions to apply either tensile or compressive stress to the semiconductor film between the film segments. A crystalline silicon film may be anchored to the substrate and have tensile stress applied thereto to reduce the lattice mismatch between the silicon and a silicon-germanium layer deposited onto the silicon film. By controlling the level of stress in the silicon film, the size, density and distribution of quantum dots formed in a high germanium content silicon-germanium film deposited on the silicon film can be controlled.
Abstract:
A chip light emitting diode having a wide viewing angle, and a fabrication method thereof. The chip light emitting diode has a resin package sealing a light emitting chip which has at least one curved projecting part. The curved projecting part has a cross section which is substantially semicircular, or substantially or partially elliptical or parabolic. The curved projecting part preferably has a cross section which is comprised of a plurality of straight lines, an angle being formed between adjacent lines. The cross section is elongated to form a cylindrical outer surface of the resin package.
Abstract:
An ultrasonically driven pump, which may be used for sampling body fluids or atomizing liquids, has a stationary outer needle and an inner needle mounted within the bore of the outer needle. The distal end of the inner needle is positioned adjacent to the distal end of the outer needle. The inner needle is ultrasonically vibrated by an ultrasonic actuator without vibrating the outer needle, with resulting draw of liquid through the distal end of the outer needle into the bore of the inner needle for discharge through the proximal end of the inner needle. The outer needle can be formed to have a penetrating tip suited for penetrating the skin of a subject to allow sampling of body fluids including interstitial fluids. The pump can also be used for atomizing liquid, by drawing liquid from a supply that is pumped from the distal end to an open proximal end of the inner needle where the liquid is discharged by atomization into the atmosphere.
Abstract:
Disclosed is a mobile communication terminal having a light guide plate for indicating the receipt of a signal. This mobile communication terminal comprises an upper frame. A light guide plate is mounted in the upper frame. The light guide plate has an opening corresponding to a region of an image display window. In addition, at least one LED is arranged adjacent to the light guide plate so as to introduce light into the light guide plate. Since the light guide plate is used for indicating the receipt of a signal, it is possible to provide a mobile communication terminal allowing a user to easily recognize a state where a signal has been received.
Abstract:
Disclosed is a light emitting diode assembly. The light emitting diode assembly comprised: a red light emitting diode chip; a short-wavelength light emitting diode chip emitting a light having a wavelength relatively shorter than that of a light emitted from the red light emitting diode chip; a first heat-dispersion member for dispersing most of the heat generated in the short wavelength light emitting diode chip; and a second heat-dispersion member for dispersing most of the heat generated in the red light emitting diode chip. Further, the second heat-dispersion member has heat dispersion performance relatively superior to that of the first heat dispersion member. Thus, spectrum movement in the red light emitted from the red light emitting diode chip may be prevented so as to prevent a color-coordinate transformation during the operation time of same.