发明名称 |
A portable radio communications device |
摘要 |
A portable radio communications device (1) has a display (6) on which a position indicator (7) can be positioned, and means (8) for controlling the position of the position indicator (7) on the display (6) manually by a user. The controlling means comprise an optical emitter adapted to illuminate an object through a translucent and moisture-proof surface; an optical detector adapted to detect changes in light reflected from the object due to the movement thereof; and circuitry for generating a control signal for the position of the position indicator (7) in dependence on the changes in reflected light. The optical detection of the movement of a finger provides a very easily operated control device with no need to press the finger against the device, and thus forces on the printed circuit boards are avoided. The moisture-proof surface ensures that the device is insensitive to dirt and moisture. |
申请公布号 |
AU2172302(A) |
申请公布日期 |
2002.05.06 |
申请号 |
AU20020021723 |
申请日期 |
2001.10.19 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) |
发明人 |
STIG FROHLUND |
分类号 |
G06F3/042;G06F3/0488;H04M1/247 |
主分类号 |
G06F3/042 |
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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