OLiGHTEK (Chinese-based OLED microdisplay maker) says that they sold 15,000 Eye Book units in 2012. The Eye Book is an HMD that uses two OLiGHTEK made 0.5" SVGA (800x600) OLED microdisplays.

I don't have a lot of information about this HMD though, the best I could find was the image below, and the fact that you can use the Eye Book for web surfing, image viewing and videos.

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