14 Segment Display

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Segment7 Standard

Heavy boxes perform quick waltzes and jigs

OpenType

Somehow, although he is the smallest office boy around the place, none of the other lads pick on him. Scuffling and fighting almost has ceased since Kerensky came to work. That's only one of the nicknames of Leo Kobreen, and was assigned to him because of a considerable facial resemblance to the perpetually fleeing Russian statesman, and, too, because both wore quite formal standing collars. Somehow, although he is the smallest office boy around the place, none of the other lads pick on him. Scuffling and fighting almost has ceased since Kerensky came to work. That's only one of the nicknames of Leo Kobreen, and was assigned to him because of a considerable facial resemblance to the perpetually fleeing Russian statesman, and, too, because both wore quite formal standing collars.

Основной латинский

ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890&@.,?!'''()*

(Sorry this is a tad long, but I've marked the questions in bold!)

So I found these 14-segment alphanumeric LEDs online and wanted to control 16 of them using a TI microcontroller. Each alphanumeric LED has 15 pins, 1 for each segment and then one for the dot at the bottom right. If I wanted to power each one directly, I'd need 240 GPIO pins. Not ideal (and not possible).

My next idea was to control each individual LED square using two 8-bit SIPO shift registers. The thing is, I'd need 2 of these for every single LED square, meaning I'd have to use 32 in total. Again, not ideal.

14 Segment Display Alphabet

My final idea was to use only two 8-bit SIPO shift registers, but 'redirect' the collective 16-bit output to an individual square using some sort of circuit. I know decoders are one-to-many, but they only send one bit out. I need a circuit that sends 16-bit data. I'm thinking this involves combining a ton of decoders, like this chip which has two 1-to-4 decoders in it. This seems really inefficient though. What sort of circuit would I need for this type of redirect?

14 Segment Display Common Cathode

Also, my problem is that each square will only be lit 1/16 of the time, so they'll be 1/16 as bright. I could pass 16 times the current, but that just sounds like a bad idea... How do I make sure the LEDs are operating at their brightest?

14 Segment Display I2c

Also, is there a way to have the LED's 'persist' using some sort of memory? If the values of the square don't change, then I don't see why I need to keep cycling through them. Would a gated D-latch do the trick?

Please let me know if I'm going about this all wrong. This is my first time trying something this complex, and I'm a bit lost at the moment.