OPTICAL SHEET, LIGHT SOURCE DEVICE AND DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an optical sheet in which at least two sheets are engaged/combined with each other in an engaged part without fixing the space between them completely so that they do not go into pieces and dust is prevented from intruding into the space between them and which can decrease the unevenness of luminance caused by a temperature rise of a light source and to provide a light source device and a display device in each of which the optical sheet is used. SOLUTION: The optical sheet is characterized in that at least two sheets each having the engaged part in the peripheral part are engaged with each other in the engaged part. It is desirable that the optical sheet has the engaged part on at least two sides and the engaged part is composed of a male engaging part and a female engaging part which are engaged with each other. COPYRIGHT: (C)2007,JPO&INPIT