Patent ID: 8154688
Filing Date: 2012-04-10
Classification: G02B,G02F

Abstract:
1. A planar light-emitting device comprising a plurality of light-emitting units, each light-emitting unit comprising: a light source; and a lightguide plate having an upper surface as a light-exiting surface, a lower surface opposite to the light-exiting surface, and peripheral side surfaces extending between respective peripheral edges of the upper and lower surfaces, the lightguide plate receiving light from the light source, guiding the received light, and emitting the guided light through the light-exiting surface, at least a part of the peripheral side surface being an inclined surface inclined relative to the light-exiting surface; the light-emitting units being arranged with the light-exiting surfaces of their respective lightguide plates being substantially flush with each other; wherein the lightguide plate of each light-emitting unit has a light-entrance surface defined by a part of the peripheral side surfaces; the light source of each light-emitting unit being adjacently opposed to the light-entrance surface to emit light into the lightguide plate through the light-entrance surface; at least a part of the peripheral side surfaces other than the light-entrance surface of each light-emitting unit being the inclined surface; wherein the inclined surface defined by the part of the peripheral side surfaces of the lightguide plate faces in an upward direction relative to the lightguide plate and the inclined surface defined by another part of the peripheral side surfaces faces in a downward direction relative to the lightguide plate; and the upward facing inclined surface of one of mutually adjacent lightguide plates being adjacently opposed to the downward facing inclined surface of an other of the mutually adjacent lightguide plates.