发明名称 |
OPTICAL TRANSMITTER AND TRANSCEIVER MODULE FOR WIRELESS DATA TRANSMISSION |
摘要 |
The optical transmission module has an array of infra-red LEDs (51) arranged in a regular, and preferably symmetrical manner in the cavity formed by a dome-shaped housing (52). The housing has a diffuser for apparent source enlargement. The LEDs are either individually or commonly addressable. Pref., the LEDs of the array (11) are located on a mounting base (10) such that the main radiation axis of the diodes is approx parallel to the centre axis of the housing. Infra-red light is emitted from the array through the housing (52). There is a substrate for circuitry underneath the diodes. A transceiver for wireless data communication and for use in connection with the module is also claimed, which incorporates a receiver consisting of photodiodes. |
申请公布号 |
EP0783808(A1) |
申请公布日期 |
1997.07.16 |
申请号 |
EP19940926236 |
申请日期 |
1994.09.03 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
GFELLER, FRITZ;RICHARD, HEINZ;WEISS, BEAT |
分类号 |
H01L33/00;G02B5/02;G08C19/36;H04B10/114;H04B10/40;(IPC1-7):H04B10/10 |
主分类号 |
H01L33/00 |
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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