Evolution of Backlights in Huma-Machine Interface (HMI) Panels

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Flat–panel displays have become very popular in the automation industry with applications such as industrial computers and human–-machine interfaces (HMIs) connecting to different types of PLCs and embedded controller boards. An understanding of the history and development of a technology can be a tremendous aid in properly using it for a given application. This white paper discusses the evolution of HMIs, in particular the backlights behind the HMIs used in many of today’s industries.