Patent ID: 7488103

Claim:
A lighting device comprising: a light guide plate having a top surface serving as a light exiting surface, a bottom surface serving as a reflective surface and a side surface serving as a light entering surface; at least one light emitting diode unit disposed adjacent to said light entering surface of said light guide plate, comprising: a light-pervious emission section comprising a front surface facing said light entering surface of said light guide plate, a back surface opposite to said front surface, a top surface, a bottom surface and right and left side surfaces; at least one light emitting diode chip embedded within said emission section and emitting light out from at least the front, top, bottom, right side and left side surfaces of the emission section; and, a flat reflective member provided separately from said light emitting diode unit and disposed over only the top surface of said emission section, said flat reflective member being at least as wide as the front surface of the emission section and extending to overlap the top surface of the emission section and a part of the top surface of said light guide plate, and the top surface of the emission section being covered with the flat reflective member which reflects the light emitted out of the top surface of the emission section back into the light guide plate, while the right and left side surfaces are left uncovered such that light is permitted to exit out of the emission section from the right and left side surfaces.