Patent application number | Description | Published |
20080217628 | LIGHT EMITTING DEVICE - The present invention relates to a light emitting device having a light emitting diode package with a plurality of light emitting cells and an integrated electronic element formed on the same substrate. The light emitting device comprises a substrate, a light emitting cell block having a first array with a plurality of light emitting cells formed on one region of the substrate arranged therein, a second array formed on the same region as the first array, and electrodes for AC power connecting the first and second arrays in reverse parallel; and at least one integrated electronic element formed on another region of the same substrate as the light emitting cell block. | 09-11-2008 |
20080315244 | LIGHT EMITTING DIODE AND METHOD FOR MANUFACTURING THE SAME - Provided are a light emitting diode (LED) and a method for manufacturing the same. The LED includes an n-type semiconductor layer, an active layer, and a p-type semiconductor layer. The active layer includes a well layer and a barrier layer that are alternately laminated at least twice. The barrier layer has a thickness at least twice larger than a thickness of the well layer. | 12-25-2008 |
20090020780 | LIGHT EMITTING DIODE WITH IMPROVED STRUCTURE - Disclosed is a light emitting diode (LED) with an improved structure. The LED comprises an N-type semiconductor layer, a P-type semiconductor layer and an active layer interposed between the N-type and P-type semiconductor layers. The P-type compound semiconductor layer has a laminated structure comprising a P-type clad layer positioned on the active layer, a hole injection layer positioned on the P-type clad layer, and a P-type contact layer positioned on the hole injection layer. Accordingly, holes are more smoothly injected into the active layer from the P-type semiconductor layer, thereby improving the recombination rate of electrons and holes. | 01-22-2009 |
20090085048 | AC LIGHT EMITTING DIODE - Disclosed is a light emitting diode (LED) operated by being directly connected to an AC power source. An AC LED according to the present invention comprises a plurality of light emitting cells two-dimensionally arranged on a single substrate; and wires electrically connecting the light emitting cells; wherein the light emitting cells are connected in series by the wires to form a serial array, the single substrate is a non-polar substrate, and the light emitting cells have non-polar GaN-based semiconductor layers grown on the non-polar substrate. | 04-02-2009 |
20090108250 | LIGHT EMITTING DIODE - A light emitting diode (LED) has an n-type semiconductor layer, an active layer, a p-type semiconductor layer, and a transparent electrode layer. The LED includes a tunnel layer interposed between the p-type semiconductor layer and the transparent electrode layer, an opening arranged in the transparent electrode layer so that the tunnel layer is exposed, a distributed Bragg reflector (DBR) arranged in the opening, and an electrode pad arranged on the transparent electrode layer to cover the DBR in the opening. | 04-30-2009 |
20090109151 | LIGHT EMITTING DIODE PACKAGE - A light emitting diode (LED) package includes a first serial array of light emitting cells formed on a first substrate to emit light of a relatively short wavelength, and a second serial array of light emitting cells formed on a second substrate to emit light of a relatively long wavelength. The first and second serial arrays are connected to in reverse parallel. The LED package is capable of being operated under AC power and emitting white light with excellent color reproduction characteristics and luminous efficiency. | 04-30-2009 |
20100045154 | LIGHT EMITTING DEVICE - The disclosed light emitting device comprises at least one first light emitting element including at least one light emitting chip for emitting light having a wavelength of 400 to 500 nm and a phosphor; and at least one second light emitting element disposed adjacent to the first light emitting element to emit light having a wavelength of 560 to 880 nm. | 02-25-2010 |
20100059763 | LUMINOUS ELEMENT HAVING A PLURALITY OF CELLS - Disclosed is a light emitting element comprising a first array having a plurality of vertical light emitting cells connected in series on a single substrate; and a second array that has another plurality of vertical light emitting cells connected in series on the single substrate and is connected to the first array in reverse parallel. In the light emitting element, each of the vertical light emitting cells in the first and second arrays has a first electrode pad on a bottom surface thereof and a second electrode pad on a top surface thereof, and a connection portion is provided to electrically connect the first electrode pad of the vertical light emitting cell in the first array to the first electrode pad of the vertical light emitting cell in the second array. | 03-11-2010 |
20100096977 | AC LIGHT EMITTING DEVICE WITH LONG-PERSISTENT PHOSPHOR AND LIGHT EMITTING DEVICE MODULE HAVING THE SAME - Disclosed are an AC light emitting device with a long-persistent phosphor and an AC light emitting device module having the same. According to an exemplary embodiment of the present invention, the light emitting device includes a first light emitting diode chip and a second light emitting diode chip, each of which has a plurality of light emitting cells on a single substrate. Further, a first long-persistent phosphor is positioned on the first light emitting diode chip to perform wavelength conversion for a portion of light emitted from the first light emitting diode chip; and a second long-persistent phosphor is positioned on the second light emitting diode chip to perform wavelength conversion for a portion of light emitted from the second light emitting diode chip. The afterglow luminescence resulted from the second long-persistent phosphor is allowed to be different from that resulted from the first long-persistent phosphor, whereby a flicker effect of the AC light emitting device can be more alleviated. | 04-22-2010 |
20100102336 | LIGHT EMITTING DIODE FOR AC OPERATION - The present invention discloses a light emitting diode (LED) including a plurality of light emitting cells arranged on a substrate. The LED includes half-wave light emitting units each including at least one light emitting cell, each half-wave light emitting unit including first and second terminals respectively arranged at both ends thereof; and full-wave light emitting units each including at least one light emitting cell, each full-wave light emitting units including third and fourth terminals respectively formed at both ends thereof. The third terminal of each full-wave light emitting unit is electrically connected to the second terminals of two half-wave light emitting units, and the fourth terminal of each full-wave light emitting unit is electrically connected to the first terminals of other two half-wave light emitting units. Also, a first half-wave light emitting unit is connected in series between the third terminal of a first full-wave light emitting unit and the fourth terminal of a second full-wave light emitting units, and a second half-wave light emitting units is connected in series between the fourth terminal of the first full-wave light emitting unit and the third terminal of the second full-wave light emitting unit. | 04-29-2010 |
20100102337 | LIGHT EMITTING DIODE FOR AC OPERATION - The present invention discloses a light emitting diode (LED) including a plurality of light emitting cells arranged on a substrate. The LED includes half-wave light emitting units each including at least one light emitting cell, each half-wave light emitting unit including first and second terminals respectively arranged at both ends thereof; and full-wave light emitting units each including at least one light emitting cell, each full-wave light emitting units including third and fourth terminals respectively formed at both ends thereof. The third terminal of each full-wave light emitting unit is electrically connected to the second terminals of two half-wave light emitting units, and the fourth terminal of each full-wave light emitting unit is electrically connected to the first terminals of other two half-wave light emitting units. Also, a first half-wave light emitting unit is connected in series between the third terminal of a first full-wave light emitting unit and the fourth terminal of a second full-wave light emitting units, and a second half-wave light emitting units is connected in series between the fourth terminal of the first full-wave light emitting unit and the third terminal of the second full-wave light emitting unit. | 04-29-2010 |
20100123119 | LIGHT EMITTING DIODE HAVING INDIUM NITRIDE - The present invention relates to a light emitting diode (LED) including an n-type nitride semiconductor layer, a p-type nitride semiconductor layer, and an active region interposed between the n-type nitride semiconductor layer and the p-type nitride semiconductor layer. The active region may include an InGaN quantum well layer. The LED may further include a super lattice layer interposed between the n-type nitride semiconductor layer and the active region. The super lattice layer may be a structure wherein InN layers and In | 05-20-2010 |
20100151604 | LIGHT EMITTING DIODE HAVING PLURALITY OF LIGHT EMITTING CELLS AND METHOD OF FABRICATING THE SAME - The present invention discloses a light emitting diode. The light emitting diode includes a plurality of light emitting cells arranged on a substrate, each light emitting cell including a first semiconductor layer and a second semiconductor layer arranged on the first semiconductor layer; a first dielectric layer arranged on each light emitting cell and including a first opening to expose the first semiconductor layer and a second opening to expose the second semiconductor layer; a wire arranged on the first dielectric layer to couple two of the light emitting cells; and a second dielectric layer arranged on the first dielectric layer and the wire. The first dielectric layer and the second dielectric layer comprise the same material and the first dielectric layer is thicker than the second dielectric layer. | 06-17-2010 |
20100163887 | LIGHT EMITTING DEVICE HAVING A PLURALITY OF NON-POLAR LIGHT EMITTING CELLS AND A METHOD OF FABRICATING THE SAME - The present invention relates to a light emitting device having a plurality of non-polar light emitting cells and a method of fabricating the same. Nitride semiconductor layers are disposed on a Gallium Nitride substrate having an upper surface. The upper surface is a non-polar or semi-polar crystal and forms an intersection angle with respect to a c-plane. The nitride semiconductor layers may be patterned to form light emitting cells separated from one another. When patterning the light emitting cells, the substrate may be partially removed in separation regions between the light emitting cells to form recess regions. The recess regions are filled with an insulating layer, and the substrate is at least partially removed by using the insulating layer. | 07-01-2010 |
20110049472 | LIGHT EMITTING DIODE - A light emitting diode (LED) has an n-type semiconductor layer, an active layer, a p-type semiconductor layer, and a transparent electrode layer. The LED includes a tunnel layer interposed between the p-type semiconductor layer and the transparent electrode layer, an opening arranged in the transparent electrode layer so that the tunnel layer is exposed, a distributed Bragg reflector (DBR) arranged in the opening, and an electrode pad arranged on the transparent electrode layer to cover the DBR in the opening. | 03-03-2011 |
20120057156 | SPECTRUM DETECTOR - Provided is a spectrum detector capable of being miniaturized and which does not require complicated optical axis alignment. The spectrum detector of the present invention comprises: a substrate; a photodetector formed on the substrate and including a semiconductor having a plurality of convex portions; and a wavelength detection circuit for detecting a wavelength of light transmitted through the plurality of convex portions, from light incident on the photodetector. According to the present invention, a small-sized spectrum detector can be provided which can easily detect a peak wavelength distribution included in light of an unknown wavelength, without the use of optical equipment such as a grating or prism, thus dispensing with the need for the optical axis alignment of a complex optical system. | 03-08-2012 |
20120139444 | LIGHT EMITTING DEVICE - The disclosed light emitting device comprises at least one first light emitting element including at least one light emitting chip for emitting light having a wavelength of 400 to 500 nm and a phosphor; and at least one second light emitting element disposed adjacent to the first light emitting element to emit light having a wavelength of 560 to 880 nm. | 06-07-2012 |
20120235158 | LIGHT EMITTING DEVICE HAVING A PLURALITY OF NON-POLAR LIGHT EMITTING CELLS AND A METHOD OF FABRICATING THE SAME - The present invention relates to a light emitting device having a plurality of non-polar light emitting cells and a method of fabricating the same. Nitride semiconductor layers are disposed on a Gallium Nitride substrate having an upper surface. The upper surface is a non-polar or semi-polar crystal and forms an intersection angle with respect to a c-plane. The nitride semiconductor layers may be patterned to form light emitting cells separated from one another. When patterning the light emitting cells, the substrate may be partially removed in separation regions between the light emitting cells to form recess regions. The recess regions are filled with an insulating layer, and the substrate is at least partially removed by using the insulating layer. | 09-20-2012 |
20130099274 | LIGHT EMITTING ELEMENT - A heat radiation structure of a light emitting element has leads, each lead having a plurality of leg sections, and a light emitting chip mounted on any one of the leads. The present invention can provide a high-efficiency light emitting element, in which a thermal load is reduced by widening a connecting section through which a lead and a chip seating section of the light emitting element are connected, and the heat generated from a heat source can be more rapidly radiated to the outside. Further, the present invention can also provide a high-efficiency light emitting element, in which heat radiation fins are formed between a stopper and a molding portion of a lead of the light emitting element so that natural convection can occur between the heat radiation fins, and an area in which heat radiation can occur is widened to maximize a heat radiation effect. | 04-25-2013 |
20130228793 | LIGHT EMITTING DEVICE HAVING A PLURALITY OF NON-POLAR LIGHT EMITTING CELLS AND A METHOD OF FABRICATING THE SAME - The present invention relates to a light emitting device having a plurality of non-polar light emitting cells and a method of fabricating the same. Nitride semiconductor layers are disposed on a Gallium Nitride substrate having an upper surface. The upper surface is a non-polar or semi-polar crystal and forms an intersection angle with respect to a c-plane. The nitride semiconductor layers may be patterned to form light emitting cells separated from one another. When patterning the light emitting cells, the substrate may be partially removed in separation regions between the light emitting cells to form recess regions. The recess regions are filled with an insulating layer, and the substrate is at least partially removed by using the insulating layer. | 09-05-2013 |
20140231860 | LIGHT EMITTING ELEMENT - A heat radiation structure of a light emitting element has leads, each lead having a plurality of leg sections, and a light emitting chip mounted on any one of the leads. The present invention can provide a high-efficiency light emitting element, in which a thermal load is reduced by widening a connecting section through which a lead and a chip seating section of the light emitting element are connected, and the heat generated from a heat source can be more rapidly radiated to the outside. Further, the present invention can also provide a high-efficiency light emitting element, in which heat radiation fins are formed between a stopper and a molding portion of a lead of the light emitting element so that natural convection can occur between the heat radiation fins, and an area in which heat radiation can occur is widened to maximize a heat radiation effect. | 08-21-2014 |
20140328056 | AC LIGHT EMITTING DEVICE WITH LONG-PERSISTENT PHOSPHOR AND LIGHT EMITTING DEVICE MODULE HAVING THE SAME - An AC light emitting device includes a first light emitting diode chip and a second light emitting diode chip, each of which has a plurality of light emitting cells on a single substrate. A first long-persistent phosphor is positioned on the first light emitting diode chip to perform wavelength conversion for a portion of light emitted from the first light emitting diode chip, and a second long-persistent phosphor is positioned on the second light emitting diode chip to perform wavelength conversion for a portion of light emitted from the second light emitting diode chip. The afterglow luminescence period of the second long-persistent phosphor is different from that of the first long-persistent phosphor. | 11-06-2014 |