| 摘要 |
PURPOSE:To obtain the sufficient and stabilized level of illumination for the titled lighting device by a method wherein a groove is rectilinearly formed on a metal electrode substrate, a plurality of light-emitting diode chips are arranged in a straight line on the bottom said groove, and light is focussed using a cylindrical lens, thereby enabling to improve the radiation effect of the light-emitting diode as well as to increase the efficiency of light emission of the titled device. CONSTITUTION:When the prescribed current is applied between a metal electrode substrate 1 and a wiring electrode 5, approximately 1% of the applied power is converted to light at the light-emitting diode and 99% of same is converted to heat. At this time, the light emitted from the side face of the light-emitting diode chips 3 is condensed at the open part of a groove 2 by a reflection surface 1a and it is irradiated as a linear beam of light on a manuscript image together with the light-emitted from the upper surface through a cylindrical lens 8. The heat emitted from the light-emitting diode chips 3 is transmitted through the metal electrode substrate 1 and radiated into the air. As the metal electrode substrate 1 can be used as a radiator by directly connecting the light-emitting diode chips 3 to the metal electrode substrate 1, the abnormal heating of the light-emitting diode chips 3 can be prevented, thereby enabling to stabilize the operation of the light-emitting diode chips 3. |
