| 摘要 |
The present invention relates to a light emitting device in which light emitting cells of a first light emitting cell block are connected in parallel to light emitting cells of a second light emitting cell block corresponding thereto. A light emitting device of the present invention comprises a substrate, and first and second light emitting cell blocks formed on the substrate and having a plurality of light emitting cells electrically connected in series to one another, respectively. Each of the light emitting cells has an N-electrode and a P-electrode. A P-electrode at one end of the first light emitting cell block is connected to an N-electrode at one end of the second light emitting cell block, and an N-electrode at the other end of the first light emitting cell block is connected to a P-electrode at the other end of the second light emitting cell block. The P-electrode of each of the light emitting cells of the first light emitting cell block and the P-electrode of each of the light emitting cells of the second light emitting cell block corresponding thereto, or the N-electrode of each of the light emitting cells of the first light emitting cell block and the N-electrode of each of the light emitting cells of the second light emitting cell block corresponding thereto are electrically connected to each other. In the light emitting device of the present invention, the light emitting cells of the first light emitting cell block and the light emitting cells of the second light emitting cell block corresponding thereto are respectively connected in parallel so that a current can cross the light emitting cells of the first and second light emitting cell blocks. Thus, even though a leakage current occurs in some of light emitting cells, the current is allowed to cross light emitting cells connected in another direction, thereby preventing overload on some of the light emitting cells due to the leakage current and ensuring uniform light emission and prolonged life span in the AC light emitting device. |
