1KHz referesh-rate MicroLed screen - Page 1
Forum section: electronics / general

author: windsmurf
author_rank: Frequent Contributor
timestamp: June 22, 2019, 10:14:12 am
content: Quote from: blueskull on June 22, 2019, 08:27:01 amDid you watch the video? They showed a red display, green display, and a blue display. They also showed an RG (red and green combo) display, and said they're working on getting it to full RGB this summer.

author: tooki
author_rank: Super Contributor
timestamp: June 22, 2019, 11:08:33 am
content: Quote from: blueskull on June 22, 2019, 07:37:44 amSince when does monolithic meananything elsethan “on the same die”?*A quick google search of “monolithic epitaxial” finds plenty of papers on the use of epitaxial layers on monolithic dies of various kinds of integrated circuits, image sensors, etc.*in the context of semiconductors, lest the pedants here start whining that I didn’t mention OS kernel architecture, stone masonry, political or organizational structure, etc...

author: tooki
author_rank: Super Contributor
timestamp: June 22, 2019, 11:12:00 am
content: Quote from: blueskull on June 22, 2019, 10:37:43 amThat’s just a photographic artifact, it often happens when you shoot red LEDs directly. Take a look at 2:51 where the light is reflecting off the lady’s hand — it’s definitely red.

author: Free_WiFi
author_rank: Regular Contributor
timestamp: June 24, 2019, 02:40:17 am
content: Wafer-scale monolithic hybrid integration of Si-based IC and III–V epi-layers—A massmanufacturable approach for active matrix micro-LED micro-displayshttps://onlinelibrary.wiley.com/doi/pdf/10.1002/jsid.649

author: Berni
author_rank: Super Contributor
timestamp: June 24, 2019, 05:44:51 am
content: Already the video gave me a hint that this might be some sort of silicon sandwich construction.You can see the wafers that are shown are patterned fully up to the edge, yet the part that makes the light seams to be missing on the edges and around the plastic pins that hold that example wafer in its case.The helpful PDF posted by Free_WiFi confirms it. The construction is shown there as being made on two separate wafers (Driver and LED) that are later on bonded together with flipchip technology. Thus giving them complete freedom in the choice of the LED material and technology. The part i do find odd tho is that after assembly they lift away the sapphire substrate that the LEDs dies are grown on. Sounds like a pretty rough step in the process while i would think the sapphire is transparent so the LEDs could shine trough it anyway. Are perhaps the sapphire wafers so expensive that they reuse them to grow more LEDs for the next batch?

author: Berni
author_rank: Super Contributor
timestamp: June 24, 2019, 06:38:14 am
content: Ah yes good point, i only had the single color type in mind.The red/green display is probably made by having the same material tuned for two different bandgaps, but getting the blue color in there would certainly not be possible. So yeah i agree that the only sensible way to make a RGB version of this display is to pattern phosphors on top of a blue LED matrix, and for that the phosphor would indeed need to be right on top of the LED to prevent bleed from other pixels.I don't really have a use for these at the moment, but i do wonder how cheap do they mean when they talk about "low cost". As usual they is no pricing on there website so one would have to call them up for a quote. But just curious if we are talking about $10 or $100 or $1000 or $10000 for one of these things.

author: Marco
author_rank: Super Contributor
timestamp: June 24, 2019, 02:05:54 pm
content: Will this ever have a cost advantage over small OLED displays? 1000Hz is nice and all, but even with foveated rendering you are far past diminishing returns at that speed.

author: BrianHG
author_rank: Super Contributor
timestamp: August 09, 2019, 09:38:04 pm
content: A new 1m$ toy!I need that 219 inch Crystal LED monitor to replace my old DLP projector...