Abstract: An image display apparatus comprising a rotatable member carrying an array of light emitting devices; a drive for rotating the member, and a control for selectively energizing each of the light emitting devices in a predetermined sequence as the member rotates so as to present a visible image. The image display device is incorporated in a fan cooling unit having a plurality of blades, the rotatable member being one of the blades of the fan cooling unit. The fan cooling unit includes a sensing arrangement responsive to rotation of the blades, for triggering the control for the energization of the light emitting devices in dependence on the speed of rotation of the blades.
Type:
Grant
Filed:
November 3, 1998
Date of Patent:
January 16, 2001
Assignee:
Frontline Display International Limited
Inventors:
Carl Michael Blissett, Philip Morgan Griffiths, Matthew Englefield