公开(公告)号：US20010038532A1

公开(公告)日：2001-11-08

申请号：US09837938

申请日：2001-04-19

申请人： U.S. PHILLIPS CORPORATION.

发明人： Gerard Harbers ,  Christoph Gerard August Hoelen

IPC分类号： F21V007/04

CPC分类号： G02B6/0036 ,  G02B6/0038 ,  G02B6/0043 ,  G02B6/0051 ,  G02B6/0076 ,  G02F1/133621

摘要： A backlight system comprises at least two light-emitting panels (1; 11) having a front wall (2; 12), an opposing rear wall (3; 13) and opposite edge surfaces (4, 14; 5, 15). At least one of the edge surfaces (4; 14) is light-transmitting and associated with a plurality of light sources (6, 16). Light originating from the light sources (6; 16) is diffused in the panel (1; 11). Sub-surfaces (8, 18) of the rear walls (3, 13) are provided with means for extracting light from the panel (1, 11). In operation, said sub-surfaces (8, 18) project light on areas (9, 19) of an (imaginary) plane (40) which is positioned parallel to the light-emitting panels (1, 11). Said projected areas (9, 19) in the plane (40) are substantially contiguous. Preferably, said sub-surfaces (8, 18) are remote from the light-transmitting edge surfaces (4; 14). Preferably, each of said sub-surfaces (8, 18) forms a single surface covering half the front wall (2, 12) of the light-emitting panel (1, 11). Alternatively, the sub-surfaces encompass a substantial area of the rear walls, the distribution of the means for extracting light from the panel being such that the amount of extracted light changes as a function of the distance to the light-transmitting edge surfaces. Preferably, the light source comprises a plurality of red, green, blue (and amber) LEDs, each preferably having a luminous flux of at least 5 lumen.

摘要翻译： 背光系统包括具有前壁（2; 12），相对的后壁（3; 13）和相对的边缘表面（4,14; 5,15）的至少两个发光板（1; 11）。 边缘表面（4; 14）中的至少一个是透光的并且与多个光源（6,16）相关联。 来自光源（6; 16）的光在面板（1; 11）中扩散。 后壁（3,13）的副表面（8,18）设置有用于从面板（1,11）提取光的装置。 在操作中，所述子表面（8,18）在平行于发光板（1,11）的位置（9,19）上投影（虚）平面（40）的区域（9,19）。 平面（40）中的所述投影区域（9,19）基本上邻接。 优选地，所述子表面（8,18）远离光透射边缘表面（4; 14）。 优选地，每个所述子表面（8,18）形成覆盖发光面板（1,11）的前壁（2,12）的一半的单个表面。 替代地，子表面包围后壁的实质区域，用于从面板提取光的装置的分布使得提取的光的量根据到透光边缘表面的距离的函数而改变。 优选地，光源包括多个红色，绿色，蓝色（和琥珀色）LED，每个LED优选具有至少5流明的光通量。