Patent application number | Description | Published |
20080211386 | LIGHT EMITTING DEVICE - Disclosed herein is a light emitting device. The light emitting device includes a light emitting diode disposed on a substrate to emit light of a first wavelength. A transparent molding part encloses the LED, a lower wavelength conversion material layer is disposed on the transparent molding part, and an upper wavelength conversion material layer is disposed on the lower wavelength conversion material layer. The lower wavelength conversion material layer contains a phosphor converting the light of the first wavelength into light of a second wavelength longer than the first wavelength, and the upper wavelength conversion material layer contains a phosphor converting the light of the first wavelength into light of a third wavelength, which is longer than the first wavelength but shorter than the second wavelength. Light produced via wavelength conversion is prevented from being lost by the phosphor. Light emitting devices including a multilayer reflection mirror are also disclosed. | 09-04-2008 |
20080231214 | LIGHT EMITTING DEVICE HAVING VARIOUS COLOR TEMPERATURE - A light emitting device capable of emitting light having various color temperatures is disclosed. The light emitting device includes a first light emitting part emitting a daylight color having a color temperature of 6000 K or more, a second light emitting part emitting white light having a color temperature less than 6000 K, and a third light emitting part emitting light in a visible range of 580 nm or more. The second and third light emitting parts are operable independently of the first light emitting part, and realize a warm white color having a color temperature of 3000 K or less with the white light emitted from the second light emitting part and the light emitted from the third light emitting part. The light emitting device realizes white light of various spectra and color temperatures corresponding to desired mood and utility. The light emitting device is controlled to emit light having a suitable wavelength or a suitable color temperature depending on the circadian rhythm of human, thereby enabling improvement of the user's health. | 09-25-2008 |
20100020531 | BACK LIGHTING UNIT HAVING PHOSPHOR FILM STRUCTURE - A back lighting unit is disclosed in which lower and upper surfaces of a light transmitting plate function as incident and exit surfaces of light, respectively, and a phosphor film structure for wavelength-converting the light is provided at a position which the light is incident on or exits from. The disclosed back lighting unit includes a light emitting means including a light emitting diode disposed to emit light upwards; a light transmitting plate disposed over the light emitting diode, the light transmitting plate having a lower surface allowing light to be incident thereon and an upper surface allowing light to exit therefrom; and a phosphor film structure including a particulate phosphor and formed on at least one of the lower and upper surfaces of the light transmitting plate. | 01-28-2010 |
20100091504 | HEAT CONDUCTING SLUG HAVING MULTI-STEP STRUCTURE AND THE LIGHT EMITTING DIODE PACKAGE USING THE SAME - The present invention provides a heat conducting slug having a multi-step structure, which is installed to an LED package to dissipate heat generated from a light emitting chip to the outside. The heat conducting slug includes a first slug, a second slug formed on the first slug, and a third slug formed on the second slug, wherein the light emitting chip is mounted to the third slug, and the second and third slugs respectively shaped to have edges are arranged to cross each other. In this configuration, heat generated from a light emitting chip follows a heat dissipation path, in which the heat is gathered at edges of one slug and dissipated therefrom and then gathered toward edges of another slug, arranged to cross the one slug. Accordingly, the entire heat dissipation path is not concentrated at a specific region but generally distributed widely, thereby improving a heat dissipation effect of the heat conducting slug. | 04-15-2010 |
20100264448 | LIGHT EMTTING DEVICE - Disclosed herein is a light emitting device. The light emitting device includes a light emitting diode disposed on a substrate to emit light of a first wavelength. A transparent molding part encloses the LED, a lower wavelength conversion material layer is disposed on the transparent molding part, and an upper wavelength conversion material layer is disposed on the lower wavelength conversion material layer. The lower wavelength conversion material layer contains a phosphor converting the light of the first wavelength into light of a second wavelength longer than the first wavelength, and the upper wavelength conversion material layer contains a phosphor converting the light of the first wavelength into light of a third wavelength, which is longer than the first wavelength but shorter than the second wavelength. Light produced via wavelength conversion is prevented from being lost by the phosphor. Light emitting devices including a multilayer reflection mirror are also disclosed. | 10-21-2010 |
20110248296 | LIGHT EMTTING DEVICE - Disclosed herein is a light emitting device. The light emitting device includes a light emitting diode disposed on a substrate to emit light of a first wavelength. A transparent molding part encloses the LED, a lower wavelength conversion material layer is disposed on the transparent molding part, and an upper wavelength conversion material layer is disposed on the lower wavelength conversion material layer. The lower wavelength conversion material layer contains a phosphor converting the light of the first wavelength into light of a second wavelength longer than the first wavelength, and the upper wavelength conversion material layer contains a phosphor converting the light of the first wavelength into light of a third wavelength, which is longer than the first wavelength but shorter than the second wavelength. Light produced via wavelength conversion is prevented from being lost by the phosphor. Light emitting devices including a multilayer reflection minor are also disclosed. | 10-13-2011 |
20120061717 | HEAT CONDUCTING SLUG HAVING MULTI-STEP STRUCTURE AND THE LIGHT EMITTING DIODE PACKAGE USING THE SAME - The present invention relates to a light-emitting diode package having a plurality of inner leads, a plurality of outer leads extending from the inner leads, a slug electrically connected to at least one of the inner leads, the slug having a thermally conductive material, a light-emitting chip arranged on the slug, and a housing supporting the light-emitting diode package. | 03-15-2012 |
20120074446 | PHOSPHOR SHEET, LIGHT-EMITTING DEVICE HAVING THE PHOSPHOR SHEET AND METHOD OF MANUFACTURING THE SAME - Disclosed herein is a light emitting device including: a substrate; a light emitting diode (LED) chip disposed on the substrate; and a phosphor sheet disposed on an upper portion of the LED chip and including alignment members formed on a lower surface thereof. The alignment members contact the LED chip, such that the phosphor sheet is aligned with the LED chip. | 03-29-2012 |
20120248469 | LIGHT EMITTING APPARATUS - A light emitting apparatus is disclosed. The light emitting apparatus includes a light-transmissive substrate having a top surface and a bottom surface, at least one semiconductor light emitting device disposed on the top surface of the light-transmissive substrate, a reflective part disposed over the semiconductor light emitting device to reflect light from the semiconductor light emitting device toward the light-transmissive substrate, and a first wavelength converter disposed between the light-transmissive substrate and the reflective part. | 10-04-2012 |
20140133145 | LED LAMP - The present invention relates to an LED lamp. In the LED lamp, light may be emitted in lateral and rear directions as well as in a front direction to obtain light distribution characteristics similar to those of an incandescent lamp, and heat generated when the LED emits light may be effectively dissipated. | 05-15-2014 |
20140355293 | INDIRECT LIGHTING APPARATUS - An indirect lighting apparatus includes a light-emitting device, a reflector disposed above the light-emitting device, and a wavelength conversion layer disposed on a surface of the reflector facing the light-emitting device and spaced apart from the light-emitting device. The wavelength conversion layer includes phosphors configured to change the wavelength of light emitted from the light-emitting device. The reflector is configured to reflect light emitted from the wavelength conversion layer, back towards the wavelength conversion layer. | 12-04-2014 |
20150036329 | LIGHT EMITTING MODULE HAVING WAFER WITH INTEGRATED POWER SUPPLY DEVICE - A light emitting module is disclosed. The light emitting module comprises a wafer having first and second surfaces; a light emitting diode chip disposed on the first surface of the wafer; a power supply device for supplying power to the light emitting diode chip; and a photoelectric conversion device for converting sunlight into electricity and providing it to the power supply device, wherein the power supply device is disposed on the second surface of the wafer. | 02-05-2015 |
20150085527 | LIGHT SOURCE MODULE, FABRICATION METHOD THEREFOR, AND BACKLIGHT UNIT INCLUDING THE SAME - A light source module, a fabrication method therefore, and a slim backlight unit including the same. The light source module includes a light emitting diode (LED) chip electrically connected to a substrate through a lower surface thereof, a wavelength conversion layer formed on the LED chip and enclosing at least the light exit face of the LED chip, and a reflector formed on a region of the LED chip excluding the light exit face. | 03-26-2015 |