Patent ID: 8485711
Filing Date: 2013-07-16
Classification: G02B,H05B

Abstract:
1. A light plate, comprising: a light guide plate, having a first surface, a second surface opposite to the first surface, and a side surface connecting to the first surface and the second surface; and four light source modules, disposed beside the side surface and around the light guide plate, wherein each of the light source modules comprises: a first white light emitting element, capable of emitting a first white beam; and a second white light emitting element, disposed beside the first white light emitting element and capable of emitting a second white beam; wherein the first white light emitting elements of the light source modules are mirror-symmetrical with respect to a first reference plane and a second reference plane, the second white light emitting elements of the light source modules are mirror-symmetrical with respect to the first reference plane and the second reference plane, and a correlated color temperature of the first white beams is greater than a correlated color temperature of the second white beams; wherein the side surface comprises four light incident surfaces disposed on four corners of the light guide plate respectively, the four light source modules are disposed beside the four light incident surfaces respectively, and the first white beam and the second white light beam respectively emitted by the first white light emitting element and the second white light emitting element of each of the four light source modules are capable of entering the light guide plate through one of the light incident surfaces; and wherein each of the light source modules further comprises a circuit board, and the first white light emitting element and the second white light emitting element of the light source module are disposed on the circuit board and electrically connected to the circuit board and the arrangement direction of the first white light emitting element and the second white light emitting element are parallel to the first surface of the light guide plate.