Interview with the CEO of OTFT developer SmartKem

UK-based SmartKem develops a new class of flexible high-mobility OTFT display backplane technologies. The company provides customized solutions involving molecular synthesis, electronic prototyping and on-site technology transfer support.

As Smartkem is developing new backplane materials for OLEDs, ePaper and mini-LED devices, we discuss its technology and business with the company's CEO and chairman, Ian Jenks.

SmartKem's CEO explains the company's OTFT tech and the future of flexible OLED production

Steve Kelly (SmartKem)UK-based SmartKem is developing a new class of flexible high-mobility p-type semiconductor inks for flexible displays. The company recently made headlines as it started its commercialization phase and announces advances in its collaboration projects with OLED producers in Asia.

SmartKem's CEO and founder, Steve Kelly, was kind enough to answer a few questions we had on SmartKem's technology and business. Steve is an international business professional with more than 20 years’ experience specializing in technology ventures, particularly early stage. He has extensive experience in Intellectual Property exploitation, VC funding and launching new technology to market.

Q: Steve, thank you for your time and for this interview. Can you first give us an overview of SmartKem’s OTFT technology?

SmartKem’s organic thin film transistor (OTFT) backplanes are designed for both glass and flexible displays. They are compatible with electronic paper displays (EPD), liquid crystal displays (LCD) and organic light-emitting diode (OLED) technologies. Through our sophisticated modelling and simulation, they have sufficient driving capability for OLED and potentially, microOLED displays which offer increased contrast, response times and energy efficiency.

Yole Developpement sees OTFT-based flexible OLEDs within 2-3 years

Yole Developpement released a new report covering the OTFT market for flexible displays and other applications. According to Yole, some display makers in Taiwan and China are currently in the process of industrializing OTFT-based displays - flexible LCDs at first, with flexible OLEDs coming within 2-3 years.

OTFT penetration for displays (2016-2022, Yole)

The mobility of OTFTs are already high enough for LCDs (higher than a-Si) - but still not enough for OLEDs. But in 2-3 years this should be resolved, with low-performance (200 PPI) OLED displays for wearables, some consumer applications and embedded automotive OLEDs possible within 2-3 years.

CPT shows flexible and transparent AMOLED prototypes

Chunghwa Picture Tubes (CPT) had some pretty interesting prototype OLED displays shown at the Touch Taiwan 2014 trade show last month. We do not have any information regarding how close are these prototypes to commercialization.

So first up is a flexible AMOLED display. This panel is 4.8" in size and 720x240 resolution (158 PPI). The company did not reveal any more technical details. The company also showed some simpler flexible PMOLED panels, demonstrating their sealing capabilities by immersing them under water (see image below).

UCLA develops new solution-processable, high-performance IGZO-ITZO backplane technology

Researchers from UCLA developed an amorphous oxide semiconductor thin-film transistors (backplane) for LCD and OLED displays. The transistors were produced using a solution process and feature a specially-designed layer with ultra-high density and high electron mobility.

The researchers say that their new process does not require a clean room or expensive equipment, and so can enable a high-performance device that is simple and cheap to produce. The new device offers an electron mobility that is 10 to 20 times greater than a-Si TFTs. It is composed of indium gallium zinc oxide (IGZO) and indium tin zinc oxide, (ITZO).

Plastic Logic explains why OTFTs are compelling as flexible OLED backplanes

Plastic Logic logoA few weeks ago I posted about Plastic Logic's OTFT-based AMOLED demonstration. While the company's current demo is a simple display (monochrome white), it seems that Plastic Logic believes that OTFT technology is now reaching a performance level for adoption in AMOLED displays.

I discussed this with Mike Banach, Plastic Logic's Research Director. Mike (and the rest of the team at PL too, of course) says that organic semiconducting materials have reached a "tipping point" in electrical performance that makes them viable to drive flexible OLED displays. Couple this with the industrial and flexibility benefits of using solution-based organic materials makes it a compelling technology option for display makers looking to establish a position in the flexible display market.

Samsung sees OLED as the leading future display technology, promises foldable OLEDs in 2015

A few days ago Samsung held their Analyst Day 2013 with a lot of fascinating information regarding the company's present business and its future plans. It was clear from Samsung Display's presentation that the company sees OLED as the leading future display technology and puts a great emphasis on flexible displays. They see flexible OLED penetration into the mobile display market reaching 40% by 2018 (up from 0.2% in 2013) - this is based on research by DisplaySearch.

In fact Samsung Electronics's CEO announced that the company aims to bring fully-foldable screens sometimes in 2015. In the same statement he mentioned that there is still plenty of room for improvement for the Galaxy Gear and it's likely that the company is already developing a wearable device with a flexible AMOLED display.

Densitron ships 3.5" HVGA AMOLEDs

Update: It turns out that these displays aren't made by RitDisplay at all. Hopefully I'll be able to provide more information soon...

Since CMEL stopped producing AMOLEDs in 2009, it was impossible to get low-volume AMOLED as Samsung and LG will only ship to large-volume applications (mobile phones, cameras, etc). But today Densitron informed us that they started shipping new HVGA (320x480) 3.5" a-Si AMOLEDs panels.

Densitron says that the DLA320480AB035F module features 10,000:1 contrast ratio, near 180-degree viewing angle and a brightness of over 200 Candela. It uses Himax's HX5227-A AMOLED driver and includes a MIPI-DBI 8/16/24 bit MPU parallel interface. For applications where high quality video streaming is required, the 8/16/24 data line parallel video (RGB) interface option is available.

OTS corporate presentation video shows the PCA-48 4.5-Gen ink-jet processing line

OLED Technologies & Solutions (OTS) released a new corporate presentation video which introduces the company and their new inkjet-printing based OLED processing line, the PCA-48:

The PCA-48 line is a 4.5-Gen (730x920 mm) line that incorporates TFE, Ink-Jet Printing, and high vacuum transportation technologies. OTS uses Merck polymer and Small-Molecule materials and their production line supports all substrates (including a-Si using Ignis' technology). OTS that they can deliver and install a complete production line within 12 months, and a single line will be able to produce 40 million smartphone displays in a year. This is the line that AIV-BEX wants to use in their proposed AMOLED production fab.

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