Semiconductor Energy Laboratory logoJapan-based Semiconductor Energy Laboratory (SEL) is an R&D IP company founded in 1980. SEL perform R&D in several areas, including transistors and semiconductor devices, materials and devices for OLEDs, LCDs and batteries, display devices and more.

SEL is actively researching and developing flexible OLED technologies. Over the past years, the company announced partnerships with Nokia, Japan Display and Sharp.

In 2019 SEL demonstrated its latest OLED technologies - including foldable and high-density displays.

Company Address: 
398 Hase,

The latest SEL OLED news:

SEL developed a hybrid OLED - reflective LCD display

Researchers from Japan's Semiconductor Energy Laboratory (SEL) and Advanced Film Device developed a display that includes an OLED display on top of a reflective LCD. The idea is that such a display have high visibility in both a dark environment (using the emissive OLED) and a bright one (using the reflective LCD).

This is similar somewhat to transflective LCD displays and can prove to be a smart solution. The researchers say that the same FET layer is used to control both display devices and so results in a low-power device. The researchers will present this new development at SID DisplayWeek next month and hopefully we will bring more information.

Photo reveals SEL's 81" 8K tiled OLED display is not really seamless

Last week Japan's SEL demonstrated an 81" 8K OLED display, built from 36 13.5" flexible OLED panels that have transparent edges on two adjacent sides. The panels are tiled together seamlessly - and this enabled SEL to create the world's largest OLED display ever.

SEL 8K 81'' flexible tiled OLED prototype photo

We now have a photo of the display prototype, as you can see above. While this is an impressive feat, it's quite clear that the display is not seamless and you can say the places where the tiles are connected.

SEL shows a 8.7" FHD touch tri-folded AMOLED prototype

In June 2014, Japan's Semiconductor Energy Laboratory (SEL), in collaboration with Nokia, unveiled new foldable OLED display prototypes - 5.9" 1280x720 (249 PPI) ones, which can be folded in two or in three (these were two different prototypes).

SEL foldable OLED prototype

Last month in Japan SEL unveiled new prototypes. The new panels are bigger at 8.7" and offer a higher resolution (1920x1080, 254 PPI). The new panels are also touch-enabled. And they are still tri-folded like the ones shown in June.

SEL and sharp show a 13.3" 8K (664 PPI!) AMOLED prototype

As we reported back in February, SEL and sharp unveiled a 13.3" 8K OLED prototype. This ultra high density (664 PPI!) display uses SEL's C-axis-aligned crystalline oxide semiconductor (CAAC-OS) backplane.

SEL's previous 13" CAAC-OS OLED prototype featured 326 PPI. But that lower-resolution panel was flexible. This new panel uses white OLEDs with color filters. SEL adopted micro cavities to narrow the wavelengths. The display features a 84% NTSC color gamut (rather low for an OLED). Each OLED pixel is driven by five transistors and one capacitor (5T+C) - there are almost 500 million pixel transistors in this display.

SEL and Nokia developed foldable OLED prototypes

Semiconductor Energy Laboratory, in collaboration with Nokia developed a new foldable OLED display. The companies are demonstrating two display prototypes. Both displays are 5.9" in size with a 1280x720 (249 PPI) resolution. One of them can be folded in two (like a book) and the other can be folded in three (seen in the video below).

Those flexible OLED displays use a white OLEDs with color filters (WOLED-CF) design. To produce the display, SEL deposited the organic and color filters layers on a glass substrate, which is later peeled off and replaced with a flexible substrate. The displays can be bent up up to a curvature of 2 mm (two-folds) or 4 mm (three folds). SEL says that these displays can be bent more than 100,000 times.

New OLED development to be discussed at SID 2014

The SID Display Week, the world's leading display industry showcase is scheduled for June, but the organizers already published the list of papers to be presented in this show. Hiding in this long list of technical achievements and research projects are some interesting new OLED developments. So here's some of the achievements to be announced during the show (at no particular order).

TCL's China Star Optoelectronics Technology (CSOT) managed to fabricate a 7" QVGA (320x240) flexible PMOLED display. The display uses a thin PEN substrate, processed at Gen-4.5. The company also proposes a design for a 14" QVGA PMOLED panel. CSOT also developed a 31" Full-HD AMOLED panel that uses a IGZO backplane. The 31" direct-emission panel was produced on a Gen-4.5 glass substrate using FMM.

The Japanese IP high court reversed the JPO's broad claim invalidation on one of UDC's fundamental OLED patents

In May 2012, the Japanese Patent Office (JPO) issued a decision regarding Universal Display's patent #4511024 - they upheld the validity of certain claimed inventions but invalidated the broadest claims. Universal Display appealed to the Japanese High Court and now they announced that the court reversed the JPO's broad claims invalidation.

The matter was remanded back to the JPO for further consideration consistent with the IP High Court’s ruling. The company who initiated the lawsuit in June 2011 was Semiconductor Energy Laboratory (SEL).

SEL unveils a 13.5" QFHD flexible OLED prototype

During the FPD International 2013, SEL unveiled a new 13.5" QFHD (3840x1260, 326 PPI) flexible OLED prototype. This is a WRGB panel (white OLEDs with color filters) and it uses a CAAS-OS (C-Axis Aligned Crystalline Oxide Semiconductor) substrate.

Toshiba was also showing a flexible panel - a 10.2" WUXGA (1920x1200, 223 PPI) WOLED panel on an IGZO backplane. This seems to be the same panel shown at SID 2013 in May 2013. Finally, Yamaga University's Research Center for Organic Electronics (ROEL) unveiled new flexible OLED technologies, including soluble organic-TFT based panels (on PET).

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