| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a backlight unit or the like surely fixing an optical sheet such as a diffusion sheet while suppressing a cost increase. <P>SOLUTION: The diffusion sheet 25 is expanded by heating at a temperature exceeding an assembling temperature higher than an operation temperature, while it is a resin which shrinks by cooling it until it reaches a shrinkage limit temperature less than the assembling temperature after expansion, and it includes two apertures HL, HL in its plane. A backlight chassis 131 to support the diffusion sheet 25 includes projecting pieces PN, PN fitted in the apertures HL, HL, on a support surface 35u. <P>COPYRIGHT: (C)2009,JPO&INPIT |
