| 摘要 |
A fluorescent strip (100) covers a light-emitting body (200). The fluorescent strip comprises a fluorescent powder layer (10) and at least two protection layers. The fluorescent powder layer is sandwiched between the two protection layers to prevent the fluorescent powder layer from dropping. The protection layers comprise an outer protection layer (14) and an inner protection layer (12). The fluorescent strip also comprises a light-gathering layer (16). The light-gathering layer covers the outer protection layer. Light emitted by the light-emitting body sequentially passes through the inner protection layer, the fluorescent powder layer, the outer protection layer and the light-gathering layer, and is gathered by the light-gathering layer. Light emitted from an LED chip is refracted and gathered by the light-gathering layer, the large-angle light output proportion is decreased, the light-emission direction of fluorescent light is determined, and the fluorescent light enters a light guide plate with a small angle, thereby improving the light coupling efficiency of the light. |
