发明名称 LIGHT COUPLING STRUCTURES FOR OPTICAL TOUCH PANELS
摘要 A coupling element (14) for use in a touch-sensitive apparatus is arranged to transfer light between an electro-optical device (2) and a panel (4) for light transmission. The electro-optical device (2) is an emitter or a detector and has an operative solid angle given by orthogonal device divergence angles. The coupling element (14) is an optical component with a first light transmission surface (21) for facing the electro-optical device (2), and a second light transmission surface (22) for mounting on the panel (4). The coupling element (14) has an optical structure (23) that directs the light between the first and second light transmission surfaces (21, 22) by one or more reflections while expanding one device divergence angle (αx) into a component divergence angle at the second light transmission surface (22). Thereby, the component divergence angle defines a divergence (φp) in the plane of the panel (4) with respect to light propagating by internal reflections inside the light transmissive panel (4).
申请公布号 US2014253831(A1) 申请公布日期 2014.09.11
申请号 US201214343571 申请日期 2012.09.05
申请人 Craven-Bartle Thomas 发明人 Craven-Bartle Thomas
分类号 G06F3/042;F21V8/00 主分类号 G06F3/042
代理机构 代理人
主权项 1. An optical component for transferring light between an electro-optical device and a light transmissive panel which defines two opposing boundary surfaces, the electro-optical device having an operative solid angle given by first and second device divergence angles in orthogonal first and second device planes, wherein the optical component comprises: a first light transmission surface configured to face the electro-optical device, a second light transmission surface for mounting on one of the boundary surfaces, and a control surface arrangement configured to direct the light between the first and second light transmission surfaces by one or more reflections so as to expand the first device divergence angle into a first component divergence angle at the second light transmission surface, the first component divergence angle being arranged to define, with respect to light propagating by internal reflections inside the light transmissive panel, a divergence inside the light transmissive panel in a direction parallel to the boundary surfaces.
地址 Sodra Sandby SE