| This appears to be done by varying current, from a slide in this 'webinar': https://youtu.be/MI5EJk8cPwQ?t=238 That's not hugely surprising given that (I believe) LEDs have always shifted spectrum-wise a bit with drive current (well, mostly junction temperature, which can be a function of drive current.) I guess that means they're strictly on/off devices, which seems furthered by this video from someone stopping by their booth: https://youtu.be/f0c10q2S_PQ?t=107 You can clearly see some pretty shit dithering, so I guess they haven't figured out how to do PWM based brightness (or worse, PWM isn't possible at all?) I guess that explains the odd fixation on pixel density that is easily 10x what your average high-dpi cell phone display has (if you consider each color to be its own pixel, ie ~250dpi x 3) It seems like the challenge will be finding applications for something with no brightness control etc. Without that, it's useless even for a HUD display type widget. In the meantime, if they made 5050-sized LEDs, they would probably print money...which would certainly be a good way to further development on developing brightness control. |
I doubt they can. Probably the process only works (or yields) small pieces, otherwise they'd be doing exactly what you suggest.
I also notice that their blues look terrible in the provided images. Which will be a problem. I don't think they get much past 490nm or so? That would also explain why they don't talk at all about phosphors, which seem like a natural complement to this tech... I don't think they can actually pump them. Which is disappointing :(