A lighting device comprising first and second groups of solid state light emitters, which emit light having peak wavelength in ranges of from 430 nm to 480 nm, and first and second groups of lumiphors which emit light having dominant wavelength in the range of from 555 nm to 585 nm. In some embodiments, if current is supplied to a power line, a combination of (1) light exiting the lighting device which was emitted by the first group of emitters, and (2) light exiting the lighting device which was emitted by the first group of lumiphors would have a correlated color temperature which differs by at least 50 K from a correlated color temperature which would be emitted by a combination of (3) light exiting the lighting device which was emitted by the second group of emitters, and (4) light exiting the lighting device which was emitted by the second group of lumiphors.

Lighting device and lighting method

Disclosed is a light-emitting diode package, comprising: a package body having a cavity; a light-emitting diode chip having a plurality of light-emitting cells connected in serial with each other; a fluorescent body for converting the wavelength of light emitted by the light-emitting diode chip; and a pair of lead electrodes. The light-emitting cells are connected together in series between the pair of lead electrodes.

Light emitting diode package

A light-emitting device package including: a package main body including a cavity and a lead frame including a mounting portion disposed in the cavity and a plurality of terminal portions; a light-emitting device chip mounted on the mounting portion; a plurality of bonding wires for electrically connecting the plurality of terminal portions and the light-emitting device chip; a light-transmitting encapsulation layer filled in the cavity; and a light-transmitting cap member disposed in the cavity and blocking the encapsulation layer to contact the plurality of bonding wires.

Light emitting device package

A multi-chip lighting emitting device (LED) lamp for providing white light includes a submount including first and second die mounting regions thereon. A first LED chip is mounted on the first die mounting region, and a second LED chip is mounted on the second die mounting region. The LED lamp is configured to emit light having a spectral distribution including at least four different color peaks to provide the white light. For example, a first conversion material may at least partially cover the first LED chip, and may be configured to absorb at least some of the light of the first color and re-emit light of a third color. In addition, a second conversion material may at least partially cover the first and/or second LED chips, and may be configured to absorb at least some of the light of the first and/or second colors and re-emit light of a fourth color. Related light fixtures and methods are also disclosed.

Multi-chip light emitting device lamps for providing high-CRI warm white light and light fixtures including the same

A white light emitting lamp is disclosed comprising a solid state ultra violet (UV) emitter that emits light in the UV wavelength spectrum. A conversion material is arranged to absorb at least some of the light emitting from the UV emitter and re-emit light at one or more different wavelengths of light. One or more complimentary solid state emitters are included that emit at different wavelengths of light than the UV emitter and the conversion material. The lamp emits a white light combination of light emitted from the complimentary emitters and from the conversion material, with the white light having high efficacy and good color rendering. Other embodiments of white light emitting lamp according to the present invention comprises a solid state laser instead of a UV emitter. A high flux white emitting lamp embodiment according to the invention comprises a large area light emitting diode (LED) that emits light at a first wavelength spectrum and includes a conversion material. A plurality of complimentary solid state emitters surround the large area LED, with each emitter emitting light in a spectrum different from the large area LED and conversion material such that the lamp emits a balanced white light. Scattering particles can be included in each of the embodiments to scatter the light from the emitters, conversion material and complimentary emitters to provide a more uniform emission.

Multiple component solid state white light

In a module socket, a connecter and a connector are connected by wiring, and three LED modules are connected in parallel with respect to a constant voltage circuit unit via the wiring. Each module has a constant current circuit unit and an LED mounting unit. The constant current circuit unit includes one resistor and two transistors mounted on a surface of a sub-substrate on which a conductive land is formed. The sub-substrate is bonded to a main substrate.

Multichip led lighting device

A plurality of groups of Light Emitting Diodes (LEDs), each group being made up of three LEDs with red, green, and blue luminous colors respectively, are mounted at positioning areas of a flexible substrate, on the wiring patterns formed on the top surface of the substrate. A plurality of heat dissipation boards are adhered to the bottom surface of the substrate using an adhesive so as to cover the areas corresponding to the positioning areas of the groups of LEDs.

Lighting apparatus with enhanced capability of heat dissipation

An illumination light source includes four different types of LEDs, namely a blue light-emitting diode 11 emitting blue light, a blue-green light-emitting diode 12 emitting blue-green light, an orange light-emitting diode 13 emitting orange light and a red light-emitting diode 14 emitting red light.

Light source having blue, blue-green, orange and red LED's

In the present invention, a plurality of concaves are provided for one main surface of a flexible substrate by press-forming. Each concave has a flat surface which is substantially parallel to the main surface of the substrate, and mounted on the flat surface are three LEDs each emitting colored light of red, green, and blue respectively.

Lighting apparatus whose light emitting elements are hard to be taken off

A light-emitting device ( 1 ) includes a base ( 10 ), a light-emitting element ( 11 ) placed on the base ( 10 ), and a wavelength converting layer ( 12 ) that covers the light-emitting element ( 11 ). The wavelength converting layer ( 12 ) includes a wavelength converting portion ( 13 ) that converts a wavelength of light from the light-emitting element ( 11 ), and a light guide portion ( 14 ) made of a light-transmitting material, and the light guide portion ( 14 ) extends from a light-emitting element ( 11 ) side to a light extraction side of the wavelength converting layer ( 12 ). Consequently, it is possible to provide a light-emitting device that can be miniaturized and reduced in thickness easily and can prevent a decrease in the light extraction efficiency.

Tetsushi Tamura

Papers

Multichip led lighting device

Lighting apparatus with enhanced capability of heat dissipation

Light source having blue, blue-green, orange and red LED's

Lighting apparatus whose light emitting elements are hard to be taken off

Light-emitting device and method for manufacturing the same