Infrared transceiver for an application interface card

• US 5,861,968 A
• Filed: 09/05/1996
• Issued: 01/19/1999
• Est. Priority Date: 12/29/1995
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Taglione, John V., Kerklaan, Albert J.
• Primary Examiner(s): Lefkowitz, Edward
• Application Number:
  US08/708,433
• Time in Patent Office: 866 Days
• Field of Search: 359/118, 359/142, 359/143, 359/147, 359/148, 359/152, 359/159, 359/172, 395/500, 395/882, 395/885
• US Class Current: 398/201
• CPC Class Codes: H04B 10/1143 Bidirectional transmission
• CPC Class Codes: H04B 10/40 Transceivers

Abstract

An infrared transceiver for an application interface card for use with a computer in a wireless Local Area Network. The transceiver includes a multi-facet beam deflector to maximize dispersion of the infrared beams in a room while maintaining a compact arrangement for the interface card. In another aspect, the transceiver includes a revolving turret to provide directional capabilities for serial IR or point-to-point communication applications. The transceiver is suitable for PCMCIA interface cards.

Claims

1. An application interface card for providing a wireless communication interface for a computer, said interface card comprising:

a card housing;

a plurality of light emitting diodes and photodiodes located on an extension portion of said card housing;

a circuit for operating said light emitting diodes and said photodiodes, said circuit including an interface for receiving signals from said computer;

a reflector positioned at the emitting end of said light emitting diodes for deflecting beams emitted by said light emitting diodes in controlled directions to produce a predetermined beam dispersal pattern wherein said reflector comprises a plurality of angled surfaces, said angled surfaces being arranged to deflect beams emitted by said light emitting diodes in predetermined directions.

2. The application interface card as claimed in claim 1, wherein said deflected beams form a half hemispherical dispersion pattern.

3. The application interface card as claimed in claim 2, wherein said light emitting diodes are mounted horizontally in a row across the extension portion of said housing.

4. The application interface card as claimed in claim 3, wherein said angled surfaces are formed from chrome plated plastic.