Winstar 20 x 4 oled alphanumeric displays winstar weh002004agpp5n00000 this display unit from winstar features oled technology to produce a device that is lightweight and has better power efficiency wider viewing angles and improved brightness over conventional lcd displays unlike most displays that only have two winstar displays have four character sets western japanese cyrillic and chinese winstar weh002004agpp5n00000 20x4 green oled character display