Alphanumeric displays, from STN to OLED
Here is an exhaustive feature on the topic of alphanumeric displays, written by our Technology Editor Steve Bush.
On the topic of LED backlight choices, he writes:
Backlighting was originally largely done with electroluminescent layers which offer pale green and a limited range of other colours.
The introduction of LED backlights has not only broadened the spectrum, but allowed a choice of colours in a single display.
“Film-compensated STN alphanumeric displays with RGB backlights have a neutral colour background and the RGB backlight allows the engineer to change the background, to red for example, to signal fault conditions,” said RS‘s Caddy.
There is also a section on OLED options…
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