POSITION DETECTING DEVICE AND ELECTRO-OPTICAL DEVICE,申请号JP20090078365-传众专利搜索

POSITION DETECTING DEVICE AND ELECTRO-OPTICAL DEVICE

申请公布号：JP2010231503(A)

申请号：JP20090078365

申请日期：2009.03.27

申请公布日期：2010.10.14

申请人：

EPSON IMAGING DEVICES CORP

发明人：ONISHI YASUNORI

分类号：G06F3/041;G06F3/042;G09F9/00

主分类号：G06F3/041

摘要：PROBLEM TO BE SOLVED: To configure an optical position detecting means requiring lower power consumption, at low cost. SOLUTION: A position detecting device includes a light guide plate 13, multiple light sources 12An, 12Bn for position detection, a photosensor 15, a light source control unit that switches between a first driving mode and a second driving mode, the first driving mode being a mode in which discharged light intensities of multiple light sources for position detection are gradually decreased toward one side of an arrangement direction of the multiple light sources for position detection and in which emitted light intensities of the position detection light beams emitted from the light emitting face exhibit a first light emission distribution tilted toward the one side of the arrangement direction, the second driving mode being a mode in which discharged light intensities of the multiple light sources for position detection are gradually decreased toward another side opposite the one side of the arrangement direction and in which emitted light intensities of the position detection light beams emitted from the light emitting face exhibit a second light emission distribution tilted toward the other side of the arrangement direction, and a position information derivation unit that derives position information regarding the object to be detected along the arrangement direction on the basis of output components of the photosensor respectively attributable to the first light emission distribution and the second light emission distribution. COPYRIGHT: (C)2011,JPO&INPIT