有機 ゆうき発光 はっこうダイオードでしょう
yūkihakkōdaiōdodeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 有機発光ダイオード

1. Organic light-emitting diode, likely.; It's probably an OLED.

Polite
Presumptive
Conjecture
Electronics