1. Field of the Invention:
This invention relates to matrix display devices, that is to display devices comprising a large plurality of elements arranged adjacently and each individually controllable to display different aspects to an observer.
2. Description of the Prior Art
There are known in the art from United Kingdom patent specifications Nos. 355,440 and 934,001 electrically controlled dot matrix display devices in which each dot element includes a laminar member, having differently reflective opposed faces, arranged to be rotatable about an axis parallel to the plane of the array so as to build up characters out of selections of reflective dots.
For night viewing, it is necessary to illuminate the prior art displays from the front, using relatively remote light sources.