OPERATING DEVICE AND IMAGE READING DEVICE,申请号JP20100131252-传众专利搜索

OPERATING DEVICE AND IMAGE READING DEVICE

申请公布号：JP2011259163(A)

申请号：JP20100131252

申请日期：2010.06.08

申请公布日期：2011.12.22

申请人：

CANON INC

发明人：ISHIDA YASUSHI;OGUSHI HIROSHI;SHIMOYAMA NOBORU

分类号：H04N1/00;G06F3/041

主分类号：H04N1/00

摘要：<P>PROBLEM TO BE SOLVED: To provide an annular touch switch and the like having a wide annular illumination area, which is capable of being illuminated brightly with less unevenness of lightness from behind by fewer light sources. <P>SOLUTION: A touch panel has an annular light transmission part. A diffusion surface is formed in a ring shape on a lower surface of a light guide body. The ring shape has a first area corresponding to one of light sources and a second area corresponding to a space between two adjacent light sources. The distance from a position corresponding to the annular light transmission part in the second area to a periphery of the ring at a side of the light sources is longer than that from a position corresponding to the annular light transmission part in the first area to the periphery of the ring at the side of the light sources. Light emitted from the light sources is incident on the light guide body, which is then diffused and reflected by the diffusion surface. And a part of the diffusion reflected light illuminates the annular light transmission part. <P>COPYRIGHT: (C)2012,JPO&INPIT