Last week we reported that Ennostar Incorporation (formed by a merger of Taiwan's Epistar and Lextar in 2020) demonstrated a 10.6" transparent microLED display at Touch Taiwan 2021. We now have more information on Lextar's new display prototype.

Lextar 10.6'' transparent microLED with spec (Touch Taiwan 2021)

This square display features a 640x640 resolution (85 PPI) and uses LED chips that are <50 um in size. This is a TFT-based display (LTPS? we're not sure) that achieves a transparency of 61%, a brightness of 3,000 nits (peak value) and a 120Hz refresh rate.

Lextar also demonstrated a smaller 5.1-inch transparent display that was developed in collaboration with X-Display (this could be the same display shown in 2019). This display is based on a micro-IC structure to achieve a transparency of over 70%.

Lextar's microLED display prototypes (Touch Taiwan 2021)

During the event, Lextar also announces its new micro-chip-in-package products. Lextar says that technology makes it possible to reduce micro-R/G/B LED chips to a pixel-sized package that is embedded onto PCB substrates. This enables very high contrast and Lextar says that this technology not only makes screens appear more three-dimensional, but it also enables excellent color uniformity over a wide range of viewing angles.



Display resolution

Could  you explain what exactly is going on with these large microled displays?

I thought a microled display was standard res, eg 640 pixels wide, but around 5 - 10mm in size.

So a large "microled" display, say 200mm wide, composed of those devices, would be over 12,000 pixels across.  Clearly, from the story that's  not the case.

Could you clarify please?


Graham,I'm not sure what you


I'm not sure what you mean - but there are many types of displays. Some are "tiled" and made from modules - each company with its own specifications. Some are produced on TFTs, like the one from Lextar, and are so with its own resolution/spec.

Display resolution

Ok, I'll try again.

The PPI is about the same as for an HD tv.

Isn't the term "microled" usually associated with a much higher resolution than that??

(Eg in a micro-display about 1cm wide, 640 pixels across, or about 1600 PPI.?)


Ah, I think I understand the

Ah, I think I understand the confusion. This is a common one.

A microdisplay is indeed a display that is small (<1inch usually) and with high performance and resolution. There are many technologies that can be used to build one: LCoS, OLED, MicroLED, DLD...

MicroLEDs are displays made from small (micro) LED chips. These can be used to make displays ranging from microdisplays to ultra-large area TVs (like the Sony Canvas Display or Samsung's Wall).

Close terms, but not the same.


Ok, gottit! Thanks.

Ok, gottit!