Light output device

Abstract

A light output device comprises at least one discrete light source device (4) integrated into the structure of a substrate arrangement (1,2,5) and an electrophoretic switchable light control device (40,42; 50; 60,62; 80,82), comprising a controllable region or regions associated with the at least one light source device (4), the electrophoretic switchable light control device (40,42; 50; 60,62; 80,82) being stacked with the substrate arrangement. The electrophoretic device can be used to alter the light output of the light source array, for example providing focusing and/or redirection. This enables the structure of the light source array to be kept simple. The light source array can essentially function as the backlight for the electrophoretic control device.

Dependencies are inferred from the claim text.