| 发明名称 |
Sensor,display device and recording device |
| 摘要 |
Keyboard comprising e.g. LEDs (12) to generate light beams within a transparent synthetic material substrate with cavities to receive keys (2) having a reflective part, if necessary. The fluctuation of light intensity in different directions is detected by means of e.g. photodiodes (18).
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| 申请公布号 |
US2004136637(A1) |
申请公布日期 |
2004.07.15 |
| 申请号 |
US20030478074 |
申请日期 |
2003.11.18 |
| 申请人 |
VERWEG FRANCISCUS GERARDUS COE |
发明人 |
VERWEG FRANCISCUS GERARDUS COE |
| 分类号 |
G02F1/13357;G02F1/133;G06F3/02;H01H13/00;H01H13/70;H01H35/00;H01L31/12;H03K17/96;H03K17/969;(IPC1-7):G02B6/00 |
主分类号 |
G02F1/13357 |
| 代理机构 |
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代理人 |
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