Patent ID: 8294162
Filing Date: 2012-10-23
Classification: H01L,H05B

Abstract:
1. An LED device, comprising: a casing formed from an insulating material and having a mounting surface and a cavity, the mounting surface located on an outside flat surface of the casing, and the cavity including an opening and a bottom surface formed in a substantially flat surface; at least one chip-mounting pad disposed on the bottom surface in the cavity of the casing; at least one pair of conductor patterns located adjacent the at least one chip-mounting pad on the bottom surface in the cavity; at least one pair of LED chips including a first LED chip and a second LED chip, and the at least one pair of LED chips formed from a substantially similar material with a substantially similar structure so as to have a substantially similar peak wavelength, the first LED chip including electrodes, a light-emitting top surface formed in a substantially square shape, and a transparent resin having a surface covering only the light-emitting top surface, wherein the transparent resin transmits light emitted from the first LED chip through the surface of the transparent resin, the first LED chip mounted on the at least one chip-mounting pad so that the light-emitting top surface is located toward the opening of the cavity with respect to the chip-mounting pad, and each of the electrodes of the first LED chip being electrically connected to the at least one chip-mounting pad and one of the at least one pair of conductor patterns, the second LED chip including electrodes and a light-emitting top surface formed in a substantially square shape, the second LED chip located adjacent the first LED chip at an interval and mounted on the at least one chip-mounting pad so that the light-emitting top surface of the second LED chip is located toward the opening of the cavity with respect to the chip-mounting pad, and each of the electrodes of the second LED chip being electrically connected to the at least one chip-mounting pad and an other one of the at least one pair of conductor patterns; at least one first electrode located adjacent the mounting surface of the casing, and being electrically connected to one of the electrodes of the first LED chip via the one of the at least one pair of conductor patterns; at least one second electrode located adjacent the mounting surface of the casing, and being electrically connected to one of the electrodes of the second LED chip via the one of the at least one pair of conductor patterns; at least one third electrode located adjacent the mounting surface of the casing, and being electrically connected to one of the electrodes of the first LED chip and to one of the electrodes of the second LED chip via the at least one chip-mounting pad; and an encapsulating resin having a top surface including a transparent resin and a phosphor, and the encapsulating resin disposed in the cavity of the casing so as to encapsulate the at least one pair of LED chips, wherein the top surface of the encapsulating resin is substantially parallel with the bottom surface in the cavity of the casing, and wherein the shortest distance between the top surface of the encapsulating resin and the surface of the transparent resin covering only the light-emitting top surface of the first LED chip is configured to be shorter than the shortest distance between the top surface of the encapsulating resin and the light-emitting top surface of the second LED chip.