Patent ID: 6913366

Claim:
An illuminating device for illuminating a display apparatus, comprising: a light guiding part that guides light to a display unit of the display apparatus, the light guiding part including: an incident surface on which the light is incident; a back surface opposite to the incident surface; an emitting surface from which the light incident on the incident surface is emitted to the display unit; side surfaces disposed between the incident surface and the back surface; and a first chamfer surface formed at a corner portion between the incident surface and one of the side surfaces, the first chamfer surface forming an angle that is no more than 90-EA/2 degree with respect to an imaginary surface extended from the light incident surface; and a first light source part that emits the light to the light guiding part, the first light source part including a first marginal luminous body disposed to correspond to the first chamfer surface, wherein an amount of the light detected in front of the first marginal luminance body is double of an amount of the light detected at the EA/2 degree deviated position, and wherein the EA indicates an emitting angle of the first luminous body.