Patent ID: 8063868

Claim:
A display device comprising: a light emitting diode; a display panel which displays an image by light emitted from said light emitting diode; a heatsink contacted to said light emitting diode, said heatsink having a surface being entirely parallel to a surface of said display panel; a holding member which is supported by said heatsink and holds said display panel so as to position said display panel and said light emitting diode at a constant distance therebetween; and an optical unit, wherein said light emitting diode is provided in a plurality of numbers, some of these plurality of light emitting diodes are red light emitting diodes to emit red light, some of the others are green light emitting diodes to emit green light, and the rests are blue light emitting diodes to emit blue light, and said optical unit is for mixing lights emitted from said red diodes, green diodes, and blue diodes and guiding the same to said display panel, wherein the plurality of light emitting diodes are arrayed in line, and said optical unit comprises: a color-mixing light guide plate for mixing light emitted from said red diodes, green diodes, and blue diodes; a reflector for folding back light emitted from said color-mixing light guide plate; and an illuminating light guide plate arranged between said color-mixing light guide plate and said display panel for emitting light made incident from said reflector to the whole surface of said display panel, wherein said holding member comprises: a front cover covering peripheral portions of said display panel; a chassis for sandwiching said display panel between said chassis and said front cover and housing said illuminating light guide plate and said color-mixing light guide plate; and a rear cover for sandwiching said illuminating light guide plate and said color-mixing light guide plate between said rear cover and said chassis, and said front cover and said rear cover are connected to said heatsink.