After seeing the cheap transparent OLED displays that have recently come on the market, you might think of using them to build wearable displays, as an economical way to build your own wearable displays, and their cost is much lower than that of expensive commercial products. To avoid you inevitably disappointed by this construction, [Zach Freedman] Decide to do it yourself and explain why Transparent wearable displays are harder than they seem.
[Zach] A headband with an integrated microcontroller was constructed to fix the transparent rich man on his eyes. For the wearer, almost everything displayed on the display is invisible, except for a slight glow, not just difficult to read. Contrary to what many people think, the difficulty of wearable displays is not the display itself, but the optics. The human eye cannot physically focus on any object at that distance, [Zach] In the video after the break, I explained why this happened and gave an excellent introduction to optics in the process. In order for the wearable display to work properly, all the light beams emitted by the display need to be focused into your eyeballs through the lens and/or reflector without distorting your view of everything except the lens. This requires lightweight and distortion-free collimators and beam splitters, which are expensive and difficult to manufacture.
Although these transparent OLEDs may not make practical head-up displays, they are still a cool part for projects such as volumetric displays. Of course you can build your own smart glasses or augmented reality glasses, you only need to focus on the correct use of optical components.