Browse Prior Art Database

Diffusion for Back Light Panels

IP.com Disclosure Number: IPCOM000053835D
Original Publication Date: 1981-Nov-01
Included in the Prior Art Database: 2005-Feb-12

Publishing Venue

IBM

Related People

Authors:
Ehn, DS Fouladian, FK Maeda, LH [+details]

Abstract

Back-lit message panels used on business machines, such as copiers or point of sale equipment, sometimes exhibit bright spots and dull spots, particularly when viewed at an angle. This article discloses the use of two light-diffusing elements placed between the light source and the panel to eliminate bright-spot problems.