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1. 发明申请

US20150248189A1 Touch Sensing Systems 审中-公开
标题翻译：触摸感应系统
公开(公告)号：US20150248189A1
公开(公告)日：2015-09-03
申请号：US14430266
申请日：2013-09-12
申请人： LIGHT BLUE OPTICS LIMITED
发明人： Paul Richard Routley , Euan Christopher Smith , Adrian James Cable
IPC分类号： G06F3/042 , G06F3/03 , G06F3/0354
CPC分类号： G06F3/0421 , G06F1/1673 , G06F3/0304 , G06F3/03545 , G06F3/0425 , G06F3/0426
摘要： We describe a touch sensing system comprising a light source to project light defining a touch sheet above a surface; a camera directed to capture a touch sense image from the touch sheet, comprising light scattered by an object; and a signal processor to process the touch sense image to identify a lateral location of the object on the surface. A brightness of the projected light is modulated to define bright, touch detecting intervals and dark intervals. The camera and the light projection are synchronized such that the camera selectively captures scattered light during the touch detecting intervals and rejects ambient light during the dark intervals. The system further comprises a pen. The pen comprises a photodetector to detect the projected light, a first light source detectable by the camera, and a controller coupled to control the first light source such that it is selectively illuminated during touch detecting intervals in synchronism with modulated projected light of the touch sheet.
摘要翻译：我们描述一种触摸感测系统，其包括光源以将表面上定义触摸板的光投射; 照相机，其指示从所述触摸片捕获触摸感测图像，包括由物体散射的光; 以及处理所述触摸感测图像以识别所述对象在所述表面上的横向位置的信号处理器。投影光的亮度被调制以定义明亮的触摸检测间隔和暗区间。照相机和光投射被同步，使得相机在触摸检测间隔期间选择性地捕获散射光，并且在暗区间内拒绝环境光。该系统还包括笔。笔包括用于检测投影光的光电检测器，由照相机可检测的第一光源，以及耦合以控制第一光源的控制器，使得其在触摸检测间隔期间与调色投影光同步地选择性地照亮。

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