Light guide assembly for optical touch sensing, and method for detecting a touch

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	Light guide assembly for optical touch sensing, and method for detecting a touch
其他题名	Light guide assembly for optical touch sensing, and method for detecting a touch
	ILMONEN, TOMMI; ÄYRÄS, PEKKA; HYVÄRINEN, HEIKKI; VÄLIMÄKI, MARCO
	2015-10-01
专利权人	MULTI TOUCH OY
公开日期	2015-10-01
授权国家	世界知识产权组织
专利类型	发明申请
摘要	A light guide assembly (2) for use in a touch sensitive area (3) of an optical touch sensing device (1) for touch screens is configured to receive light, to allow the light thereby received to propagate in the light guide assembly, and to deliver the light thereby propagated in the light guide assembly further out of the light guide assembly. The light guide assembly comprises a plurality of light guide stripes (4, 5) for controlling the propagation of light. The optical touch sensing device is configured to detect the presence of an external object (10) on the basis of changes in the light delivered further out of the light guide assembly due to interaction of the light with the external object. According to the invention, the light guide assembly comprises an interaction arrangement (8, 9) configured to define at least one restricted interaction area (11) within the touch sensitive area for interaction between the light and the external object, the interaction arrangement comprising a two-way coupling arrangement (8, 9; 12; 14; 15) configured to couple light out of the light guide assembly, out of one light guide stripe (4), and to couple a portion of the thereby out-coupled light, after reflection from the external object (10), back to the light guide assembly into a second light guide stripe (5).
其他摘要	用于触摸屏的光学触摸感测装置（1）的触敏区域（3）中的光导组件（2）被配置为接收光，以允许由此接收的光在光导组件中传播，以及将由此在光导组件中传播的光进一步传送出光导组件。光导组件包括多个光导条纹（4,5），用于控制光的传播。光学触摸感测装置被配置为基于由于光与外部物体的相互作用而进一步从光导组件输出的光的变化来检测外部物体（10）的存在。根据本发明，光导组件包括交互装置（8,9），其配置成在触敏区域内限定至少一个受限的交互区域（11），用于光与外部物体之间的相互作用，交互装置包括：双向耦合装置（8,9; 12; 14; 15），被配置成将光从一个光导条纹（4）中耦合出光导组件，并耦合一部分由此向外耦合的光，在从外部物体（10）反射之后，返回光导组件进入第二光导条纹（5）。
主权项	A light guide assembly (2) for use in a touch sensitive area (3) of an optical touch sensing device (1) for touch screens, the light guide assembly (2) being configured to receive light (6), to allow the light thereby received to propagate in the light guide assembly, and to deliver the light (7) thereby propagated in the light guide assembly further out of the light guide assembly, the light guide assembly com- prising a plurality of light guide stripes (4, 5) for controlling the propagation of light in the light guide assembly; the optical touch sensing device being configured to detect the presence of an external object (10) on the basis of changes in the light deliv- ered further out of the light guide assembly due to interaction of the light with the external object, characterized in that the light guide assembly comprises an interaction arrangement (8, 9) configured to define at least one restricted interaction area (11) within the touch sensitive area for interaction between the light and the external object, the interaction arrangement comprising a two-way coupling arrangement (8, 9; 12; 14) configured to couple light out of the light guide assembly, out of one light guide stripe (4), and to couple a portion of the thereby out-coupled light, after reflection from the external object (10) , back to the light guide assembly into a second light guide stripe (5) , for detecting the presence of the external object on the basis of said reflection.
申请日期	2014-07-14
专利号	WO2015004331A9
专利状态	未确认
申请号	PCT/FI2014/050574
公开（公告）号	WO2015004331A9
IPC 分类号	G02B6/35 \| G06F3/042
专利代理人	PAPULA OY
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/54521
专题	半导体激光器专利数据库
作者单位	MULTI TOUCH OY
推荐引用方式 GB/T 7714	ILMONEN, TOMMI,ÄYRÄS, PEKKA,HYVÄRINEN, HEIKKI,et al. Light guide assembly for optical touch sensing, and method for detecting a touch. WO2015004331A9[P]. 2015-10-01.

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