3m Innovative Properties Company

Andrew M Hicks

Bruno Mueller

John C Wright

A light guide () comprises a housing () defining a light-guiding optical cavity having first and second opposed major faces (), and a light source () arranged to direct light into the cavity from one end, to be guided between the major faces. The first major face () comprises a window through which light can be emitted from the optical cavity to be used, for example, for illuminating a graphic display. To improve the light distribution across that first major face (), the second major face () comprises a sheet material () having a specularly-reflecting surface () that faces into the optical cavity and has diffusely-reflecting light-extraction elements () applied thereto in a predetermined configuration for causing light to be emitted from the optical cavity through the said window.

Growing community of inventors

Reading, United Kingdom

Andrew M Hicks