发明名称 |
Input device based on frustrated total internal reflection |
摘要 |
A touch panel in which two or more light sensors emit light into a transparent panel at an angle to sustain transmission through the panel by total internal reflection. The transmitted light is detected at an array of light detection positions around the periphery of the panel opposite to each light source. When an object contact the surface of the panel, light transmitted along the pathway from a given source past the contact point to one of the detection points is attenuated by the frustrated total internal reflection (FTIR) effect. Each contact causes two or more intersecting light beams having known end points to be attenuated, enabling a connected processor to determine the position and size of the contact area.
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申请公布号 |
US7432893(B2) |
申请公布日期 |
2008.10.07 |
申请号 |
US20030461741 |
申请日期 |
2003.06.14 |
申请人 |
MASSACHUSETTS INSTITUTE OF TECHNOLOGY |
发明人 |
MA HONGSHEN;PARDISO JOSEPH A. |
分类号 |
G09G3/36;G06F3/033;G06F3/042 |
主分类号 |
G09G3/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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