| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a diode refraction ceiling lighting device that has brightness of a ceiling lighting device even to effectively utilize the brightness by regulating the projection area and inducing the luminous flux. <P>SOLUTION: Mainly a fiber light guide plate, a frame, and light entering faces, which make a luminous flux generated by a luminescence unit enter two sides opposing the light guide plate, are formed; a refraction surface is provided all over the light guide plate and a reflection surface is provided all over other surface; a plurality of projected granular reflection members distributed on the reflection surface in matrix to reflect in the direction of the refraction surface are provided; the grain diameter gradually becomes smaller towards the light entering face direction in geometric progression on the basis of the surface center of the reflection surface; the mutual distance is gradually increased adversely; the route of the luminous flux injected by curved reflection surfaces of the reflection members becomes close to the vertical line of the refraction surface; the luminous flux is evenly projected to effectively regulate the lighting angle; the frame covering the periphery practices heat dissipation and forms a connection so that the frame can be easily mounted on the ceiling; and local projection lighting is formed to a floor surface; in the device. <P>COPYRIGHT: (C)2011,JPO&INPIT |
