LED PLANAR LIGHTING DEVICE SET ON BASIS OF LIGHT GUIDE PLATES USING COMMON CONVERTER

摘要

Disclosed is an LED planar lighting device set on the basis of light guide plates using a common converter. A plurality of LED planar lighting devices on the basis of the light guide plates are detachably attached to a connection frame member such that all the devices form one united LED planar lighting device set. A parallel-connection wiring part is provided at the connection frame member for connecting LED light source parts of the LED planar lighting devices and the common converter, which receives commercial alternating-current power through an alternating-current wire aligned in a single line and converts the alternating-current power into direct-current driving power, in parallel with respect to the common converter so as to carry out constant-voltage driving such that the direct-current driving power is supplied to the respective LED light source parts. Installation work is simplified by using the common converter. The plurality of LED planar lighting devices are attached to the connection frame member such that axial lines of the plurality of LED planar lighting devices along an optical axis are gradually spaced further apart from each other as they get farther from the LED planar lighting device set so as to improve light efficiency and illumination uniformity.