Transparency

At CES 2025, Samsung is showing an interesting microLED application, a smart mirror device. The idea is to provide a mirror with a display on top, that can scan your face and recommend treatment solutions to tailor your skin. 

Samsung said that it employed a "aluminium and niobium micro-patterned mirror structure" to provide a 80% mirror-level reflectance. The mirror (and display) is 21-inch in size. It seems as if this is just a demonstration project, it is not likely to turn into a commercial product anytime soon.

AUO is showcasing its latest microLED technologies at CES 2025, focusing on automotive solutions, under the Smart Cockpit 2025 platform. The company is demonstrating several novel applications, enabled by the transparent and flexibility of microLED displays.

So first up we have the Virtual Sky Canopy, and XR Interactive Window technology - both of these adopt the use of tiled transparent microLED displays to embed within the car windows and windows, and extend the display beyond the normal instrument cluster and information displays.

MicroSolid Printing pioneer VueReal is going to unveil several new technologies and products at CES, as the company gets ready for microLED display commercialization. VueReal wants companies to take advantage of the unique properties of microLED displays (mainly the customized production process and the high transparency and high brightness) and this year it will focus on new applications that can be enabled only by microLEDs.

First up, VueReal is launching new microLED Design Reference Kits to enable product designers to buy display samples and integrate into new designs. The first kit will provide microLED-powered lighting panels. These resemble OLED lighting panels - area lighting that is uniform. But unlike OLEDs, microLEDs will provide high brightness, long lifetime, and reduced costs. These are basically monochrome simple displays, and VueReal will offer either in native colour (R, G, B) or phosphor coated (white, red, amber).

UK-based OTFT developer Smartkem announced that it has partnered with AUO to jointly develop rollable transparent microLED displays, based on Smartkem's OTFT backplane technology. The project will be based on a novel OTFT production process developed at ITRI.

Smartkem believes its technology will not only enable high-end rollable transparent microLED displays, but it will also enable drastic cost reduction that will bring costs down to mass market prices. Smartkem's low-temperature processing enables the use of low-cost and flexible plastic substrates rather than glass, which the company says will be a decisive factor in bringing production costs down.

The microLED display technology is highly promising, as these displays offer increased brightness, efficiency and lifetime over the current LCD and OLED displays. However adoption of microLED displays in the major display markets is still years away. One display segment that could see adoption of microLED display sooner, is the transparent display sector.

Transparent displays are very interesting and have been researched for many years - and we have seen commercial adoption of transparent LCD, LED and OLED displays. These never achieved meaningful market success, but microLED developers hope that once microLED transparent displays are available this could change, thanks to the higher transparency and brightness offered by microLEDs compared to OLEDs and LCDs.

In recent years, we have seen many companies demonstrating transparent microLED prototypes, and even deploying some solution commercially. We will detail some of these recent advances below.

MicroLED display developer VueReal announced a strategic partnership with PMOLED producer RiTDisplay display, that will enable device makers to access VueReal's microLED display technologies.

VueReal and RiTDisplay have been collaborating for several years, co-developing automotive displays and lighting solutions. The two companies will now target the consumer market with high-performance and cost-effective displays. The displays will be based on RiT's passive-matrix backplane and VueReal's microLED frontplane solutions.

Today we published a new edition of our Transparent MicroLED and OLED Market Report, with all the latest information and updates from this interesting upcoming industry and market, including the many new prototypes and displays recently unveiled by microLED developers.

Reading this report, you'll learn all about:

• Transparent OLED and MicroLED properties and advantages
• The transparent OLED and MicroLED industry
• What kind of transparent OLEDs are currently on the market
• The transparent OLED lighting market

The report package also provides:

• Transparent OLED display product listing
• A guide into buying transparent OLEDs
• The main challenges towards transparent displays
• Free updates for a year

This transparent displays market report provides a great introduction to transparent OLED and MicroLED technologies and covers everything you need to know about the market and industry now and in the future. This is a great guide for anyone who's thinking about adopting transparent displays in their products or that wants to understand this industry and market throughout.

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.

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.

Taiwan-based Innolux demonstrated new microLED display prototypes: a wide 187-inch microLED tiled display, a 9.6" flexible automotive microLED prototype and a transparent microLED.

Innolux did not detail much about these new prototypes. All of its microLEDs are based on blue microLEDs with quantum dot color conversion, and LTPS backplanes on glass substrates.