Sharp Kabushiki Kaisha Corporation

Makoto Matsuda

Toshio Hata

Tomokazu Nada

Makoto Agatani

Shinya Ishizaki

Toyonori Uemura

Hiroaki Onuma

Tatsuya Morioka

Shinji Osaki

Hitoshi Matsushita

Kazuaki Kaneko

Osamu Jinushi

Yoshihiro Kawaguchi

Kiyoto Gotoh

Junichi Somei

Kenji Hatazawa

Yuji Kozuma

A light emitting apparatus that includes at least one kind of light emitting elements of which the number is one or more, and a phosphor that is excited by output light of the light emitting element. In a case where all light emitting elements mounted before the phosphor is mounted in the light emitting apparatus emit light, the light emitting apparatus has a peak wavelength of output light in a first wavelength region of 440 nm or longer and shorter than 460 nm, and has a peak wavelength of output light in a second wavelength region of 460 nm to 490 nm.

Light emitting apparatus with two primary lighting peaks

Provided is a light-emitting device that is able to adjust a color temperature by power supplied from a single power source. The light-emitting device includes an anode electrode land, a cathode electrode land, and three or more wires that are provided in parallel and are connected to the anode electrode land and the cathode electrode land, in which at least three wires among the three or more wires have different forward current-forward voltage characteristics and are connected to different light emitting portions, and the color temperature of light emitted from the whole of the light-emitting portions is able to be adjusted.

Light-emitting device

There is provided a light source device which includes at least one kind of light emitting elements of which the number is one or more, and a phosphor excited by output light of the light emitting element. In a case where all light emitting elements mounted before the phosphor is mounted in the light source device emit light, the light source device has a peak wavelength of output light in a first wavelength region of longer than 440 nm and 490 nm or shorter, and has a peak wavelength of output light in a second wavelength region of 380 nm to 440 nm. Thus, it is possible to provide a light source device which can cause the white color, the dark-blue color, and the black color to simultaneously look vivid when an irradiation target (for example, clothes or the like) is irradiated.

Light source device and light emitting apparatus

A light-emitting device () is provided with: a light-emitting module () in which a light-emitting section () is provided on a ceramic substrate (); a heat sink (); a holder () having a ceramic plate () for attaching the light-emitting module () to the heat sink (); and a heat-dissipating sheet () provided between the ceramic substrate () and the heat sink ().

Light-emitting device having ceramic materials for improving performance thereof

A light emitting device which can adjust color temperature as power is supplied from a single power source and a lighting device including the light emitting device are provided. The light emitting device includes an anode electrode land; a cathode electrode land; a first light emitting unit and a second light emitting unit which are electrically connected to the anode electrode land and the cathode electrode land, are adjacently provided in parallel with each other; and a low pass filter including a capacitance member which is provided in parallel with the first light emitting unit and the second light emitting unit, and a resistance member which is provided in series with the first light emitting unit and the second light emitting unit, in which electric resistance of the first light emitting unit is larger than electric resistance of the second light emitting unit.

Lighting device and light emitting device having red and green phosphor arranged therein

A light emitting device () includes light emitting elements (), conductor wirings (), and alignment marks () formed on a substrate (). The alignment marks () and the conductor wirings () are formed by printing.

Light emitting device and method for manufacturing light emitting device

There is provided a light-emitting device including an anode electrode land, a cathode electrode land, and a first light-emitting unit and a second light-emitting unit electrically connected to the anode electrode land and the cathode electrode land and provided in parallel to each other, in which the first light-emitting unit and the second light-emitting unit each include blue light-emitting LED chips, the first light-emitting unit and the second light-emitting unit have different amounts of change in luminous flux with respect to an amount of change in current applied between the anode electrode land and the cathode electrode land, and a color temperature generated from an entire light-emitting unit including the first light-emitting unit and the second light-emitting unit can be adjusted.

A light emitting device which can adjust color temperature as power is supplied from a single power source comprises an anode electrode land; a cathode electrode land; a first light emitting unit and a second light emitting unit; a low pass filter including a capacitance member which is provided in parallel with the first light emitting unit and the second light emitting unit; and a resistance member which is provided in series with the first light emitting unit and the second light emitting unit. A phosphor which is included in the first light emitting unit and the second light emitting unit includes a red phosphor which is excited by the primary light that is emitted from the LED element and emits light with a peak light emission wavelength into a red region, and a green phosphor which is excited by the primary light that is emitted from the LED element and emits light with a peak light emission wavelength into a green region.

The light emitting device includes at least one light emitting element that emits light having a peak emission wavelength in a wavelength range from 380 nm to 480 nm inclusive; a first green phosphor that is excited by the primary light emitted by the light emitting element and emits light having the peak emission wavelength in the green region; a second green phosphor that is excited by the primary light and emits light having the peak emission wavelength in the green region; and a red phosphor that is excited by the primary light and emits light having the peak emission wavelength in the red region. The peak emission wavelength of the light emitted by the second green phosphor is shorter than the peak emission wavelength of the light emitted by the first green phosphor.

Light emitting device having high color rendering using three phosphor types

A substrate-type LED light source () includes: at least one blue LED chip () which has an emission peak in a range fromnm tonm so as to correspond to a blue light region absorption peak of chlorophyll; a red phosphor () which emit, upon receiving excitation light from the at least one blue LED chip (), light having a peak wavelength in a range fromnm tonm so as to correspond to a red light region absorption peak of chlorophyll; and a resin layer () in which the red phosphoris dispersed and which covers the at least one blue LED chip ().

Light emitting device, LED light source for plant cultivation, and plant factory

A light emission device includes: an insulating substrate; a light emitting section including a plurality of LED chips mounted on the insulating substrate; and land electrodes for supplying power to the LED chips. At least a surface of each of the land electrodes is made of a conductive material which is harder than Au and Ag and which has sulfurization resistance to such an extent that secures conduction of each land electrode when a current in a working current range is applied on the land electrode.

Light emission device and illumination device

A light emitting device () of the present invention is a light emitting device including a light emitting section () provided on a substrate (), light storing phosphors () being provided on or above at least a part of the substrate (). It is therefore possible to provide a planar light emitting device having a light storage function.

Light emitting apparatus and illuminating apparatus

An illumination device with a toning function in which possibility of moisture and dust intruding into the case is reduced with a simple mechanism is realized. The illumination device includes a light emitting element light source () mounted on a substrate inside the case unit (), an external gear-shaped fluorescent-substance plate () having a configuration in which a light emitting color of an applied fluorescent substance differs according to position and being arranged above the light emitting element light source () inside the case unit (), and an internal gear-shaped adjustment ring () arranged so as to mesh with the external teeth of the fluorescent-substance plate (), wherein the adjustment ring () is arranged to be positioned on the outer periphery of the main body under a lens dome (), and when the adjustment ring () is rotated, a relative positional relationship between a color distribution applied on the fluorescent-substance plate () and the light emitting element light source () is changed.

Illumination device

The light-emitting device includes: a substrate which has a single layer structure in which a conductive member is partially provided on a surface of the substrate; a plurality of light-emitting elements which are directly provided on the surface of the substrate so as to be electrically connected with the conductive member; a first light reflection resin layer; a second light reflection resin layer which is provided in a looped shape on the surface of the substrate so as to surround an area in which the plurality of light-emitting elements are provided; and a sealing resin which covers the plurality of light-emitting elements. In the area in which the plurality of light-emitting elements are provided, the conductive member is covered with the first light reflection resin layer, the conductive member, which is provided under the second light reflection resin layer, is covered with the second light reflection resin layer directly, and a printed resistor, which is provided under the second light reflection resin layer, is covered with the second light reflection resin layer via the first light reflection resin layer. This makes it possible to provide the light-emitting device which (i) reduces absorption of light so as to achieve excellent light extraction efficiency, and (ii) is highly reliable.

Growing community of inventors

Sakai, Japan

Makoto Matsuda