| 摘要 |
PURPOSE:To obtain a uniform luminance distribution by forming the surface of a transparent synthetic resin film covering arrayed light-emitting diode devices on a light collection surface. CONSTITUTION:The surface covering a light-emitting diode device 2 is formed on a light collection surface which collects light emitted from the light-emitting diode device 2 in front. Hence, light emitted from a light-emitting diode device 25 which emits a strong light particularly travels through a synthetic resin film 4 and travels radially in many directions from a non-light collection surface 46. Light which advances obliquely is totally reflected on the non-light collection surface 46 and advances toward a substrate 1. Most of the light are absorbed here, and some of it is reflected again on the substrate 1 and advances obliquely from the non-light collection surface 46. As a result, if this array is seen from the front, the light emission of the light-emitting diode device 25 is seen in the same brightness as that of other light-emitting diode devices 2 despite the fact that the light emission of the device 25 is stronger than that of the device 2, and the luminance distribution becomes uniform. |
