PPI

At Displayweek 2025, TCL CSoT demonstrated several new microLED displays. The most interesting one seems to be the world's smallest microLED microdisplay at 0.05-inch. The display offers a density of 5080 PPI, and a brightness of 4 million nits. This is the first time TCL shows a microLED microdisplay.

OLEDs and MicroLEDs by TCL CSoT, SID Displayweek 2025

TCL also showed a large format display, a 219-inch 5760x1440 120Hz tiled display. The company did not disclose any technical specifications. The company also showed a microLED display designed for automotive HUD applications, that offers a brightness of up to 45,000 nits and a wide FOV.

In August 2023, China-based BOE HC Semitek started building its $700 million microLED epiwafer production line in Jinwan District, Zhuhai, China. In October 2024, the company announced that it started producing sample wafers.

A few days ago the company held a ceremony as it is starting to mass produce 6-inch microLED wafers, as the project enters its commercial stage. BOE now has a full microLED industry chain, from epiwafers to modules and applications.

HKC unveiled its first microLED display prototype, a 6.67" 100 PPI (roughly 580 × 325) panel that offers 1,000 nits of brightness, and a 99% DCI-P3 color gamut. 

HKC's display is produced on the company's high mobility oxide (HMO) backplane. The company says that its HMO material offers an electron mobility that is 20 to 50 times higher than that of amorphous Silicon (a-Si).

Researchers from the Chemnitz University of Technology have combined several new technologies to enable high density high-brightness microLED displays. The researchers demonstrated a 3400 PPI 1080x780 monochrome green display with a brightness of over 10,000,000 nits.

To achieve this high performance display, the researchers used wafer-scale high-quality epitaxial growth, sidewall passivation, efficient photon extraction, and elegant bonding technologies.

X Display Company (XDC) has announced that it has developed a new micro-IC driven microLED display in collaboration with Lumileds. XDC says that its micro-IC architecture is efficient and also cost-effective to produce, and is already ready for mass production.

The two companies developed a 140 PPI display that uses Lumiled's 13x20 micron LEDs, and XDC's own microIC backplane technology. The display offers high brightness (2360 nits peak) and an excellent image quality. 

Justin Brown is X Display's Executive Vice President for Operations & Equipment. Justin leads the company’s supply chain development, manufacturing partner relationships and also its Equipment division, which provides mass-transfer equipment for XDC’s partners and licensees. Justin was kind enough to answer a few questions we had for XDC.

Q: Hello Justin, thanks for your time. XDC has been a bit quiet in the last few years. Can you bring us up to date on your microLED technologies, processes and products?

Thank you for the opportunity to share the progress at XDC. We have been busier in the near past than ever before. As you know, we first announced our MicroIC technology, our mass transfer process, our manufacturing equipment and the uniqueness of our approach, the IP strength we possess and the experience of the team. This led to broad customer visibility and we narrowed down our efforts to a select set of partners that we are currently working with. We have deep engagements with customers that we anticipate will result in end product announcements in the future.

Tianma shows several MicroLEDs prototypes at Displayweek 2024, including automotive displays, transparent displays, and wearable ones.

The first display was an automotive, a transparent 8.07-inch octagon-shaped display aimed towards digital side mirror applications (to be placed inside the vehicle). The display offers a transparency of 55%, a resolution of 608x1204 (167 PPI) and a brightness of 1,500 nits.

Innolux showed several new microLED display prototypes at Displayweek 2024, as it focuses on microLEDs as its next-generation display solution.

First, the company showcased a large 106" tiled microLED TV display, build from 96 12.3" modules. The display uses 20x40 um blue microLED chips (with QD color conversion) and an LTPS backplane.

AUO had an impressive booth at Displayweek, showing some of its latest microLED prototypes. It is clear that the company is highly focused on microLED technology as its next-gen display strategy.

First up, with a 31" large area single-panel microLED, which AUO says is the world's largest. The display is produced on a single glass LTPS backplane, and offers 120Hz and a brightness of 500 nits. AUO calls this a Large Size A.R.T. MicroLED display.

US-based Q-Pixel announced that it has developed a new 3K x 1.5K, a 1.1x0.6 cm (6800 PPI) microLED microdisplay. Q-Pixel says that this is the world's highest resolution color microdisplay - but they actually mean the highest density full-color microdisplay.

Q-Pixel's technology is based around a single-pixel color-tunable microLED device, and the company's displays are produced using a monolithic process. In May 2023, the company announced a 5,000 PPI full-color microdisplay. In fact, later in 2023 the company announced a 10,000 PPI microLED microdisplay, but the 10,000 display was a passive-matrix microdisplay, and the newly announced display is an active-matrix one.