| 摘要 |
PURPOSE:To emit light forward by condensing the light emitted perpendicularly on a substrate from each light emitting diode through a convex lens, and con densing the light emitted obliquely on the substrate through a ringlike convex lens to efficiently condense the light. CONSTITUTION:The light emitted perpendicularly or nearly perpendicularly to a substrate 1 from each light emitting diode 2 is condensed through a convex lens 31 to a parallel light beam to be emitted to all surface. The light emitted obliquely to the substrate 1 is condensed through a ringlike convex lens 32 to an oblique parallel beam, and is then subjected to total reflection by a reflecting mirror 33 to be wholly radiated. Thus, the light emission from the diode 2 can be efficiently emitted forward. |
