After Samsung Electronics and Apple released their phones last year with new wider aspect ratios of 18.5:9 and 19.5:9, respectively, most smartphone brands have similarly followed suit by applying wider aspect screens to their 2018 lineup to keep up with product differentiation.

Improvements in display technologies have hastened the expansion of the wider screen adoption in smartphones. Initially, flexible active-matrix organic light-emitting diode (AMOLED) technology was required to realize a full-screen display, and thus, 18:9 or wider screens were expected predominantly to be used in premium and high-end smartphones in 2018.

However, with rapidly improving designs in liquid crystal display (LCD) cell structure, thin-film transistor (TFT) array and light-emitting diode (LED) backlight, TFT LCD can now be used in full-screen smartphones.

“With the improvement in TFT LCD technology, smartphone makers are now aggressively applying 18:9 aspect ratio of TFT LCD to their 2018 models even for mid-end and entry-level smartphones, instead of using high-priced flexible AMOLED panels,” said Hiroshi Hayase, senior director at IHS Markit.

“It would be correct to assume that smartphone displays are undergoing a quick generation change to TFT LCD-based full screens later this year,” Hayase said. “The new generation of smartphones will be expected to stimulate replacement demand in the 2019 smartphone market.”