| 摘要 |
An apparatus for improving a light output structure of a visible light coating area of an optical film lamp has a transparent closed housing, and an optical film (20) and a visible light layer (30)for omnidirectionally reflecting ultraviolet light and transmitting visible light. The transparent closed housing is a hollow housing with ultraviolet light radiated therein. An optical film and a visible light layer are coated on a wall surface of the housing or on a support piece disposed in the inner space of the housing. The visible light layer is formed of only a single layer of fluorescent particles or phosphorescent particles, and the particles are sparsely and evenly coated on the inner wall of the housing or the support piece in the inner space of the housing, so that the area A2 covered by the particles is in a certain proportion to the total area A1 of spaces between the particles, so as to enable the visible light layer to provide the high luminous efficiency. |
