PPI | MicroLED-Info

JBD demonstrates a 3 million nits microLED microdisplay

Shanghai-based Micro-LED microdisplay developer JBD unveiled two new Micro-LED microdisplay prototypes. First up is the JBD5UM720P-G, a 0.31" 720p (1780x720, 5,000 PPI) display that features a typical brightness of 3 million nits (!). This is a monochrome green (530 nm) display.

JBD 3 million nits 720p microLED microdisplay (CES 2020 photo)

The second display, the JBD25UMFHD-B is a higher density display, at 10,000 PPI it achieves a 2560x1440 resolution in the same 0.31" size. This is a monochrome blue (455 nm) display that has a brightness of 150,000 nits. The display's refresh rate is 360Hz.

KAIST researchers use 3D stacked MicroLEDs to enable high density displays

Researchers from the Korea Advanced Institute of Science and Technology (KAIST) developed a new process that enables the fabrication of highly dense MicroLED displays - up to 63,500 PPI (!).

The technique involves stacking RGB LEDs in three dimensions and a semiconductor patterning process. Stacking LEDs one on top of the other creates color interference issues, and to overcome this the researchers deposited an insulating film between the layers. This also improved the efficiency of the microLED devices.

Japan Display to demonstrate its first microLED prototype, developed in collaboration wth Glo

Japan Display announced that it is developing micro-LED display technologies, and the company will unveil its first prototype at FINTECH Japan 2019 in early December. JDI will show a 1.6" 300x300 (256 PPI) display that is based on the company's own LTPS backplane with microLED chips developed by Glo.

Japan Display and glo 1.6-inch microLED prototype photo

The new display provides a wide viewing angle of 178 degress and offers very high brightness (3,000 nits).

Here is Glo and Kyocera's 1.8" microLED prototype

In June 2019 Micro-LED developer Glo announced a partnership with Japan-based display maker Kyocera to demonstrate a 1.8" Micro-LED display. Here's Kyocera's booth at CEATEC 2019 that features this display (03:00):

The Glo microLED display features a resolution of 256x256 (200 PPI), a peak luminance of 3,000 nits and a color gamut of 81% Rec.2020. The display's frame rate is 240Hz and the response time is 7 usec or less. For this demonstration panel, Kyocera provided the LTPS backplane and driving technology while glo provided its InGaN RGB micro-LEDs and its transfer technology.

Mikro Mesa develops a cost-effective 4" RGB mass transfer process

Taiwan-based microLED developer Mikro Mesa announced that it achieved a breakthrough in its microLED transfer and bond process, which now enables the company to transfer 2-5 um microLED chips using a large 4-inch stamp.

Mikro Mesa microLED pixels macro photo

Mikro Mesa's new process can transfer color (RGB) vertically-structured microLED chips and create a full-color display. It can be used to create high-density dipslays - up to 1,800 PPI and be used to create large microLED TVs, over 55-inch in size. The new process is a low temperature one (below 200 degrees Celsius) and can be used on flexible substrates - and be also used to create transparent displays.

AU Optronics to demonstrate a 12.1" LTPS Micro-LED display prototype

AU Optronics announced that it will demonstrate a 12.1" LTPS micro-LED display prototype next week that features a resolution o 1920x720 (169 PPI). It seems that this is the same display shown at IFA 2018.

AUO 12.1'' LTPS micro-LED prototype (August 2019)

The 2018 display used blue LEDs with color conversion, which achieved "marvelous color performance", according to AUO.

JBD demonstrates 2-million nits and 10,000 PPI Micro-LED microdisplays

Shanghai-based Micro-LED microdisplay developer JBD unveiled its latest Micro-LED microdisplay prototypes. JBD's panels can achieve a high brightness of 2 million nits coupled with very high pixel density (5,000 PPI) on a monochrome green display.

JBD also demonstrated an even high pixel density display (10,000 PPI). JBD can currently produce either monochrome or dual-color (red and green) microdisplays, and is developing full-color ones.

Mojo Vision developed a 14,000 PPI Micro-LED microdisplay

AR developer Mojo Vision announced that it developed a 14k sub-pixel PPI (1.8µm sub-pixel pitch) Micro-LED microdisplay, to power its upcoming AR platform. The microdisplay is a monochrome green one, that the company says is the smallest display ever developed at 0.48 mm diameter.

Mojo Vision 14k PPI Micro-LED display prototype photo

This prototype, according to Mojo Vision, demonstrates the capability that MicroLEDs have to create more seamless AR experiences. The company did not say how close it is to commercialize the display, but did say that it will release more details on its MicroLED displays and technology development at a "future date".