Quad HD display improves smartphone resolution

The display provides richer and more accurate colours with a 120% colour gamut, exceeding the 100% gamut offered on conventional panels, for mobile devices (based on sRGB).The QHD display has 1,440x2,560 resolution, four times higher than HD resolution (720x1,280), and the number of pixels per inch is 538 on the 5.5" panel.

The panel also adopted Advanced In-Cell Touch (AIT) technology which offers excellent touch sensitivity so that it can respond to touch commands even with water drops on the screen. The display boasts advancements in other major image quality features, with a contrast ratio that is 50% higher than conventional QHD LCD panels, while the brightness has increased by 30% without any increase in power consumption. A brighter screen and higher contrast ratio makes it easier for users to view the smartphone display in bright outdoor conditions.

The company received certification from Intertek, the leading provider of product safety testing and certification, for the superiority of the colour gamut, brightness, and contrast ratio in the 5.5" QHD LCD panel.

LG Display employed three leading technologies to achieve the superior specifications of the display: high colour gamut LED, Advanced In-Cell Touch (AIT) and photo-alignment.

The high colour gamut LED technology provides more accurate colours in red and green by combining a blue LED chip with red and green phosphors instead of combining the blue LED chip with a yellow phosphor used in conventional LED backlights. LG Display has achieved a 20% improvement in colour gamut with this technology.  

Developed by LG Display, AIT represents an improvement over conventional ‘In-Cell touch technology’. Instead of placing the touch panel on top of the LCD, the touch sensor is embedded within the LCD. This results in a slimmer design and an excellent touch response as the thickness of the panel is reduced by eliminating the need for an additional space for touch functions.

The photo-alignment technology uses UV light to form a liquid crystal alignment layer in the display panel, which helps achieve a higher contrast ratio by aligning the liquid crystals evenly to reduce light leakage. The higher contrast ratio contributes to deeper blacks and brighter colours that create a sharper picture quality.

Mr. Byeong-Koo Kim, Vice President, IT/Mobile Development Group, LG Display, said, “The company has maximised the essential display functions for mobile devices from touch to colour gamut by using the latest technology and accumulated expertise.” He added, “LG Display will continue to develop products that can offer the best user experience not only for smartphones, but also for tablets and notebook PCs.”