| Patent application number | Description | Published |
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| 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 |
| Patent application number | Description | Published |
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| 20090004778 | Manufacturing Method of Light Emitting Diode - Disclosed is a manufacturing method of a light emitting diode. The manufacturing method comprises the steps of preparing a substrate and mounting light emitting chips on the substrate. An intermediate plate is positioned on the substrate. The intermediate plate has through-holes for receiving the light emitting chips and grooves for connecting the through-holes to one another on its upper surface. A transfer molding process is performed with a transparent molding material by using the grooves as runners to form first molding portions filling the through-holes. Thereafter, the intermediate plate is removed, and the substrate is separated into individual light emitting diodes. Accordingly, it is possible to provide a light emitting diode in which the first molding portion formed through a transfer molding process is positioned within a region encompassed by cut surfaces of the substrate. Since the first molding portion is positioned within the region encompassed by the cut surfaces of the substrate, second molding portions can be symmetrically formed on the side surfaces of the first molding portions in various manners. | 01-01-2009 |
| 20090189178 | LEADFRAME HAVING A HEAT SINK SUPPORTING PART, FABRICATING METHOD OF A LIGHT EMITTING DIODE PACKAGE USING THE SAME, AND LIGHT EMITTING DIODE PACKAGE FABRICATED BY THE METHOD - Disclosed are a leadframe having heat sink supporting parts, a light emitting diode package in which the leadframe is employed, and a fabricating method of a light emitting diode package using the leadframe. The leadframe includes an outer frame surrounding a predetermined region. The heat sink supporting parts extend inward to face each other from the outer frame. Each of the supporting parts has an end portion coupled to a heat sink. Further, lead terminals extend inward to face each other from the outer frame. The lead terminals are spaced apart from the supporting parts. Accordingly, a package main body can be formed by an insert molding technique after the heat sink is coupled to the end portions of the supporting parts, and the heat sink and the lead terminals can be easily aligned. | 07-30-2009 |
| 20090230419 | LIGHT EMITTING DEVICE - The present invention provides a light emitting device which comprises a blue light emitting diode, and at least an orthosilicate based phosphor for emitting light ranging from a green to yellow regions and a nitride or oxynitride based phosphor for emitting light in a red region over the light emitting diode. Accordingly, since white light with a continuous spectrum ranging from green to red can be implemented, a light emitting device with improved color rendering can be provided, and the light emitting device can be used for a general illumination or a flash. Further, since the phosphors having stable chemical characteristics against their external environment such as moisture are employed, the stability in optical characteristics of the light emitting device can also be improved. | 09-17-2009 |
| 20090267085 | LED PACKAGE HAVING AN ARRAY OF LIGHT EMITTING CELLS COUPLED IN SERIES - Disclosed is a light emitting diode (LED) package having an array of light emitting cells coupled in series. The LED package comprises a package body and an LED chip mounted on the package body. The LED chip has an array of light emitting cells coupled in series. Since the LED chip having the array of light emitting cells coupled in series is mounted on the LED package, it can be driven directly using an AC power source. | 10-29-2009 |
| 20090315053 | LIGHT EMITTING DEVICE - The present invention provides a light emitting device, comprising a first light emitting diode for emitting light in an ultraviolet wavelength region; at least one phosphor arranged around the first light emitting diode and excited by the light emitted from the first light emitting diode to emit light having a peak wavelength longer than the wavelength of the light emitted from the first light emitting diode; and at least one second light emitting diode for emitting light having a wavelength different from the peak wavelength of the light emitted from the phosphor. According to the present invention, there is provided a white light emitting device, wherein using a light emitting diode for emitting light different in wavelength from light that is ex-cititively emitted from the phosphor, an excitation light source, i.e., light in the ultraviolet region for exciting the phosphor is effectively used, thereby improving energy conversion efficiency and improving reliability. | 12-24-2009 |
| 20100159620 | MANUFACTURING METHOD OF LIGHT EMITTING DIODE - Disclosed is a manufacturing method of a light emitting diode. The manufacturing method comprises the steps of preparing a substrate and mounting light emitting chips on the substrate. An intermediate plate is positioned on the substrate. The intermediate plate has through-holes for receiving the light emitting chips and grooves for connecting the through-holes to one another on its upper surface. A transfer molding process is performed with a transparent molding material by using the grooves as runners to form first molding portions filling the through-holes. Thereafter, the intermediate plate is removed, and the substrate is separated into individual light emitting diodes. Accordingly, it is possible to provide a light emitting diode in which the first molding portion formed through a transfer molding process is positioned within a region encompassed by cut surfaces of the substrate. Since the first molding portion is positioned within the region encompassed by the cut surfaces of the substrate, second molding portions can be symmetrically formed on the side surfaces of the first molding portions in various manners. | 06-24-2010 |
| 20100224904 | LED PACKAGE HAVING AN ARRAY OF LIGHT EMITTING CELLS COUPLED IN SERIES - Disclosed is a light emitting diode (LED) package having an array of light emitting cells coupled in series. The LED package comprises a package body and an LED chip mounted on the package body. The LED chip has an array of light emitting cells coupled in series. Since the LED chip having the array of light emitting cells coupled in series is mounted on the LED package, it can be driven directly using an AC power source. | 09-09-2010 |
| 20110140135 | LED PACKAGE HAVING AN ARRAY OF LIGHT EMITTING CELLS COUPLED IN SERIES - Disclosed is a light emitting diode (LED) package having an array of light emitting cells coupled in series. The LED package comprises a package body and an LED chip mounted on the package body. The LED chip has an array of light emitting cells coupled in series. Since the LED chip having the array of light emitting cells coupled in series is mounted on the LED package, it can be driven directly using an AC power source. | 06-16-2011 |
