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    • 4. 发明授权
    • Optical film with defect-reducing surface and method for making same
    • 具有缺陷表面的光学膜及其制造方法
    • US06322236B1
    • 2001-11-27
    • US09246970
    • 1999-02-09
    • Alan B. CampbellAndrew McKeeSanford Cobb, Jr.Wade D. Kretman
    • Alan B. CampbellAndrew McKeeSanford Cobb, Jr.Wade D. Kretman
    • F21V508
    • G02B6/0065G02B5/00G02B6/0043G02B6/0053G02F2001/133507G02F2001/133607Y10S385/901
    • An optical film has surface that reduces the occurrence of optical defects in a display using the film. In particular, the surface has randomized characteristics that reduce such defects as wet-out, Newton's rings, and Moiré effects. The film has a first surface free of regular structure, the first surface having a plurality of local height maxima, a characteristic measure of the first surface having a random value within a predetermined range. The film also has a second surface opposing the first surface. A method of making an optical film includes embossing a pattern lacking regular structure onto a first surface of a film, wherein the first surface has a plurality of local height maxima, a characteristic measure of the first surface having a random value within a predetermined range. The characteristic measure may be a difference between the actual heights and a nominal height of the film surface, average separation between the local height maxima on the surface, or slope angle of the first surface proximate a local height maximum.
    • 光学膜具有减少使用该膜的显示器中的光学缺陷的发生的表面。 特别地,表面具有减少诸如润湿,牛顿环和莫尔效应之类的缺陷的随机特征。 薄膜具有无规则结构的第一表面,第一表面具有多个局部高度最大值,第一表面的特征量度具有在预定范围内的随机值。 该膜还具有与第一表面相对的第二表面。 制造光学膜的方法包括将不规则结构的图案压印到膜的第一表面上,其中第一表面具有多个局部高度最大值,第一表面的特征量度具有在预定范围内的随机值。 特征测量可以是实际高度和膜表面的标称高度之间的差异,表面上局部高度最大值之间的平均间隔,或邻近局部高度最大值的第一表面的倾斜角度。