| 摘要 |
PURPOSE: A film projection device is provided to keep the illuminance of a screen plate uniform over the entire area by forming diffusion protrusions on a rear surface of the screen plate. CONSTITUTION: A film projection device includes a body part, a switch, a cover frame, and a screen plate. The body part(10) receives lamps(16). The switch(15) is mounted to an electric wire(17) for supplying power to the lamps, for supplying power or blocking the power supply for the lamps. The cover frame(11) is rotatably mounted to a front surface of the body part via hinges(12). The screen plate(14) is supported by the cover frame and formed with diffusion protrusions on a rear surface for helping the light generated by the lamps to be uniformly radiated to the entire surface of the screen plate. |
