Patent ID: 9164226
Filing Date: 2015-10-20
Classification: G02B,G02F,H04N

Abstract:
1. An illumination device, comprising: a housing member having a bottom plate and side walls that rise up from the bottom plate; a light guide plate having a front surface from which light inputted from a side edge face of the light guide plate is outputted, and a rear surface that faces the bottom plate of the housing member, the light guide plate being disposed on an inner side of the side walls such that a space is formed between the side edge face of the light guide plate and one of the side walls of the housing member facing the side edge face; a light source unit provided with light sources and a light source substrate having the light sources mounted on a substrate surface thereof, the substrate surface facing the side edge face of the light guide plate, the light source unit being disposed in said space such that a gap is formed between the substrate surface of the light source substrate and the side edge face; an optical sheet disposed on the front surface of the light guide plate, the optical sheet having an outer edge that protrudes from the side edge face of the light guide plate in a plan view towards the light source substrate to cover the bottom plate at said gap; and a first support member that includes a flat first attaching part fixed onto the bottom plate such that a front end of the first attaching part is interposed between the bottom plate and the light guide plate and a rear end of the first attaching part is disposed within the space between the one of the side walls and the side edge face, and a flat first standing wall that rises from the rear end of the first attaching part, the first standing wall having the light source substrate fixed thereto, thereby allowing the light source unit to be disposed within said space, wherein a circulation hole is formed in at least one of the light source substrate and the housing member such that an air space surrounded by the side edge face of the light guide plate, the substrate surface of the light source substrate, the bottom plate of the housing member, and the outer edge of the optical sheet communicates with an outside of the illumination device, and wherein the circulation hole is formed through the light source substrate, the first standing wall, and one of the side walls, and has a first section of the circulation hole formed through the light source substrate and the first standing wall, and a second section of the circulation hole formed through the one of the side walls are provided with a spatial offset in a plane perpendicular to their direction of protrusion.