Patent ID: 6853410

Claim:
A liquid crystal display device comprising a liquid crystal display element having a pair of substrates and a liquid crystal layer sandwiched therebetween, an illumination unit which is disposed on a surface opposite to a display surface of said liquid crystal display element, said illumination unit including an integrally-molded housing which is made of white synthetic resin and has side walls at a periphery thereof, a light guide body which is disposed between the substrates and said housing, a light source which is disposed on a side surface of said light guide body in said housing, and a reflection sheet being positioned between the light guide body and said housing with a space from one end of the first reflection surface of said first reflection member so as to be thermally expandable in a direction substantially parallel with the substrates, when the light source is turned on, without generating undulation thereon, wherein said illumination unit further includes a first reflection member which is disposed in said housing, said first reflection member including: a first plate disposed between said light source and one of the side walls of said housing to be substantially perpendicular to the pair of substrates such that a first reflection surface thereof faces said light source, said first plate being thermally expandable in a direction substantially perpendicular to the substrates, when the light source is turned on, without generating undulation thereon, a second plate disposed between said light source and the pair of substrates to be substantially parallel with the pair of substrates such that a second reflection surface thereof faces said light source, said second plate being thermally expandable in a direction substantially parallel with the substrates, when the light source is turned on, without generating undulation thereon, and said reflection sheet is further disposed between said light source and said housing without reaching said one of the side walls so as to expose a surface of said housing to said light source such that a light irradiated downwardly from said light source is reflected by a Part of said surface of said housing which is substantially parallel with the substrates.