| 摘要 |
A lighting apparatus includes a phosphor layer whose color is almost invisible from the outside, and the apparatus achieves controlling of a light distribution of the light emitted from an LED. The lighting apparatus is provided with an LED 2 mounted on the substrate 1, a phosphor-containing layer 3 placed on the LED 2, and a transparent body 5 placed at a position opposed to the LED 2, placing a certain space therebetween. A prism 6 made up of multiple convex stripes being arranged in parallel, is placed in a predetermined region on a surface of the transparent body 5, the surface being opposed to the LED 2. The convex stripes have a structure to reflect outside light incident at least from the upside of the transparent body 5 along the normal direction of the substrate, in the upward direction of the transparent body. With this structure, the prism reflects the outside light, thereby suppressing that the phosphor color is made visible from the outside when the light is not emitted. In addition, since the prism 6 controls the light distribution of the light emitted from the LED 2, this function can be used to control the light distribution for the use as a stroboscopic unit. |
