LG Display had an impressive area at SID and we particularly were impressed with the 77″ Flexible OLED that it has shown before, but which we had not seen. However, the company tends to make a really big effort to show all its latest technology at CES, so there was relatively less that was new for us to report at SID.
LG’s 77″ flexible, transparent OLED had been shown before but this was the first time that we got to see it.
An interesting new development was a new OLED for VR applications that the company has been developing in collaboration with Google. The 4.3″ panel has 3840 x 4800 resolution and that means pixels of 17.6μm x 8.8μm and 1440 ppi. The display has 150 cd/m² of luminance and 15,000:1 contrast. It is built on an LTPS backplane, using a white OLED + filter architecture. The refresh rate is 120Hz. (The paper describing the display is here).
The field of view chosen for looking at the display was 120º x 96º to get a balance taking into account optical challenges at wider FOVs. This gives a central acuity of 40 ppd. Driveng the display is tricky because of the high data rate needed and to help with this, a foveated rendering approach was used.
LG & Google’s VR Panel
The companies showed a table comparing the limits of vision compared with their display.
| Specification | Upper bound | As built |
| Pixel count (h × v) | 9,600 × 9,000 | 4,800 × 3,840 |
| Acuity (ppd) | 60 | 40 |
| Pixels per inch (ppi) | 2,183 | 1,443 |
| Pixel pitch (µm) | 11.6 | 17.6 |
| FoV (°, h × v) | 160 × 150 | 120 × 96 |
