| 摘要 |
A light reflective sheet (21,31) comprising a porous resin sheet and a protective layer laminated on at least one surface of the porous resin sheet. The porous resin sheet comprises a polyolefin resin and 100 to 300 parts by weight of a finely powdery inorganic filler with respect to 100 parts by weight of a polyolefin resin, and the sheet is stretched at an area stretch magnification of 1.5 to 20 times; the light reflectance of the porous resin sheet at a wave length of 550 nm is 95% or more, and the stiffness of the light reflective sheet is at least 50mm. The protective layer has a function as a UV light protective layer (22) and/or a light leakage preventing auxiliary layer (33). The light reflective sheet is useful as a light reflective sheet for back light units of liquid crystal displays of word processors, personal computers and television, as well as lights, copying machines, projector system displays, facsimiles, and electronic blackboards. A light reflector using the light reflective sheet in a lamp holder portion (2) of the back light unit in the liquid crystal display (6) and/or under a transparent light guide plate can utilize the light more effectively than a conventional back light unit, whereby its luminance can be improved. |
