Abstract: An edge-lit back plate has two mounting frames coupled to opposite longitudinal side surfaces of a back plate including a laminate body with a reflector, a light guide and a diffuser. At least one light source assembly is located within a recess of each mounting frame and positioned adjacent to one of the longitudinal side surfaces of the laminate body. The edge-lit back plate is configured to be installed on a rack to illuminate products on such rack.

Abstract: A luminescent back plate has a back light module and two mounting frames. The back light module has a body and at least one light source assembly. The body is a laminate having a reflector, a light guide and a diffuser and has two longitudinal side surfaces, a front surface and a bottom surface. The at least one light source assembly is located adjacent to one of the longitudinal side surfaces of the body and has a light emitting side. The light emitting side faces toward one of the two longitudinal side surfaces. The mounting frames are respectively disposed adjacent to the longitudinal side surfaces and are mounted on the longitudinal side surfaces of the body. The luminescent back plate may be installed on a rack and provides a surface light to catch customers' attention.