Surface light source device with frame including light source and light guide plate

摘要

A surface light source includes a light source facing an end face of a lightguide plate, a rectangular-shaped frame surrounding an outer peripheral surface of the lightguide plate, and a reflecting sheet is disposed on a lower surface of the frame. The frame is formed such that an inside frame portion is made of a white resin and an outside frame portion is made of a black resin. The inside frame portion and the outside frame portion are integrally molded by a two-color molding method.

主权项

1. A surface light source device comprising:
a light source and a lightguide plate accommodated in a frame such that an outer peripheral surface of the lightguide plate is surrounded by the frame, wherein light emitted from the light source is incident to the lightguide plate from an end face of the lightguide plate, wherein the light guided in the lightguide plate is output from a light output surface of the lightguide plate, wherein the frame comprises:
a first frame portion of which at least one side constitutes an inner peripheral surface of the frame, the first frame portion being made of a light-reflecting material; anda second frame portion with which an outer peripheral surface of the first frame portion is covered, the second frame portion being made of a light-absorbing material, and wherein a light shielding sheet is disposed above the light source and the lightguide plate to cover surroundings of the light source and the lightguide plate therewith, and the light shielding sheet is bonded to upper surfaces of the first frame portion and the second frame portion while striding over a bonded surface in which the outer peripheral surface of the first frame portion and the inner peripheral surface of the second frame portion are in contact with each other.