公开(公告)号：US20080113117A1

公开(公告)日：2008-05-15

申请号：US11936445

申请日：2007-11-07

申请人： Christopher A. Coenjarts ,  Jianbo Di ,  John Graf ,  Emine Elif Gurel ,  David L. Hartter ,  Grant Hay ,  Todd M. Loehr ,  Philip M. Peters ,  Joseph A. Riello ,  Shixiong Zhu

发明人： Christopher A. Coenjarts ,  Jianbo Di ,  John Graf ,  Emine Elif Gurel ,  David L. Hartter ,  Grant Hay ,  Todd M. Loehr ,  Philip M. Peters ,  Joseph A. Riello ,  Shixiong Zhu

IPC分类号： G02B1/04

CPC分类号： C08J5/18 ,  C08J2369/00 ,  C08K3/22 ,  C08K3/24 ,  C08K3/26 ,  C08K5/005 ,  C08K5/13 ,  C08K5/524 ,  C08L25/14 ,  C08L33/04 ,  C08L63/00 ,  C08L69/00 ,  C08L83/04 ,  C08L2205/00 ,  G02B5/0242 ,  G02B5/0278 ,  Y10T428/10 ,  Y10T428/1036 ,  Y10T428/105 ,  Y10T428/25 ,  Y10T428/254 ,  Y10T428/26 ,  C08L2666/02 ,  C08L2666/22 ,  C08L2666/04

摘要： Disclosed herein are light diffusing films, methods of making the same and articles using the same. In one embodiment, a method of making a light-diffusing film comprises: mixing about 90 wt. % to about 99.999 wt. % of a powdered polycarbonate and about 0.001 wt. % to about 3 wt. % light-diffusing particles to form a mixture, wherein weight percents are based on a total weight of the light-diffusing film; melting the mixture to form a melt; and extruding the melt in the form of a sheet to form the light-diffusing film. The light-diffusing film comprises a hiding power of about 0 to 0.5 that is mathematically described by the following equation: Hiding   power   ( % ) =  1 - ∑ i = 1 n - 1  L i  ( on ) ∑ j = 1 n - 1  L j  ( off )  × 100 wherein: Li(on) is luminance above ith cold cathode fluorescent lamp, Lj(off) is luminance at a midpoint between cold cathode fluorescent lamp j and cold cathode fluorescent lamp j+1, and n equals number of CCFL lamps.