PHOSPHOR COATING FILMS AND LIGHTING APPARATUSES USING THE SAME

摘要

A lighting apparatus (2) includes a circuit board (4) having a highly reflective top surface and at least one LED chip (6), operable to emit light with a first color, mounted on the top surface. A phosphor film (8) having an arc inner surface is configured to maintain a predetermined finite distance from the LED chip (6). The phosphor film (8) is disposed in the way that light emitted from the LED chip (6) radiates upon the phosphor film (8). The inner surface of the phosphor film (8) hoods the top surface of the circuit board (4) so as to form a multi-reflection zone to reduce light absorption by the LED chip (6) and reduce direct light leakage from between the phosphor film (8) and the top surface of the circuit board (4). The phosphor film (8) containing phosphors converts at least a portion of the light with the first color into light with a second color to produce visible white light by mixing the first and second colors.