Browse Prior Art Database

Rotating Optical Fiber Display

IP.com Disclosure Number: IPCOM000088743D
Original Publication Date: 1977-Jul-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Barrekette, ES: AUTHOR [+2]

Abstract

A rotating fiber bundle arranged in a block 1, or the like, is shown in Fig. 1. One end of the fiber bundle is arranged in a circle, as shown at 3, and the other end is fanned out into a linear array, as shown at 5 and 7. As block 1 spins, the circular end stays constant in shape and the linear end describes a cylindrical surface. A circular light source array, such as a light-emitting diode (LED) array, addresses the circular end such that one light source exists for each fiber shown.

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Rotating Optical Fiber Display

A rotating fiber bundle arranged in a block 1, or the like, is shown in Fig. 1. One end of the fiber bundle is arranged in a circle, as shown at 3, and the other end is fanned out into a linear array, as shown at 5 and 7. As block 1 spins, the circular end stays constant in shape and the linear end describes a cylindrical surface. A circular light source array, such as a light-emitting diode (LED) array, addresses the circular end such that one light source exists for each fiber shown.

At a given instant in time, if all the LEDs are addressed into an on state, a vertical line is formed since all of the fibers are illuminated. On the other hand, if only one LED is addressed, then as the block rotates, a diagonal line is formed, since the fibers will be illuminated in sequence, one after another, with the moving linear end creating the diagonal. It is clear that one may generate any shape such as alphanumeric characters or the like, on the outside of the cylinder. As shown in Fig. 2, the image may be expanded and flattened by a concave mirror 9 with a curvature one half of that generated by the virtual image.

One advantage of this arrangement resides in the fact that the LED array is multiplexed into a long line of characters in a flat field. Typically, prior techniques for this type of display require an electrical connection to be made to the LEDs with slip-ring communication. The implementation disclosed here is simpler in that it...