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Will innovation drive displays into post-touchscreen era?

Posted: 08 Sep 2014 ?? ?Print Version ?Bookmark and Share

Keywords:display? Touch Taiwan? touchscreen?

Sharp's high SNR projective capacitive touch panel

Sharp unveiled a capacitive touch panel system, which it says could be applied to a very large screen. The picture above shows a 70-inch touch panel. The limitation of touch-screen size is attributed to conventional sequential drive controllers, because as the number of sensor channels increases, the SNRs degrade.

Sharp SNR panel

Sharp, as revealed in its ISSCC paper earlier this year, resolved the issue by driving the sensor channels in parallel. Although the parallel drive methodology tends to mix the signals from multiple channels, Sharp engineers have figured out a way to reconstruct the original signals.

Amorphous silicon (a-Si) TFT LCD coming to smartphones?


Now, AUO says it plans to launch a 5-inch full HD smartphone panel by using an a-Si TFT LCD. The 5-inch panel on display, with 443ppi pixel density, comes with a 1mm border. AUO described it as the narrowest border achieved by using a-Si technology.

1mm border display

LTPS rules in resolution and slim border

5.5-inch WQHD panel

AUO also showcased a 5.5-inch WQHD panel (1,440px x 2,560px) for smartphone displays created by using a Low Temperature Polycrystalline Silicon (LTPS) process. It has raised the pixel density to 538ppi. The new display also features a border as narrow as 0.7mm.

WQHD panel with 538ppi

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