An OLED display can be driven with a passive-matrix (PMOLED) or active-matrix (AMOLED) control scheme. In the PMOLED scheme, each row (and line) in the display is controlled sequentially, one by one, whereas AMOLED control uses a thin-film transistor backplane to directly access and switch each individual pixel on or off, allowing for higher resolution and larger display sizes. ST is pleased to announce a new improved method of making TFTs for the backplanes in AMOLEDs.  Replacing LTPS (low temperature polysilicon), which uses polycrystalline silicon, with “textured” or highly oriented silicon (where the crystals are oriented in one plane such as (111)) promises dramatically to improve the transistor which drives the pixels. ST is the only company in the world with patented technology for this (see links below).

Product Patent – 9722130B2

Method Patent – 9054249B2