LTPS - Page 3

IGNIS Innovation published the following interesting video that shows how its compensation technology can remove the visible signs of pixel aging:

IGNIS tells us that this is a 12" LTPS automotive AMOLED panel. The company tested it for 1,000 hours at 85 degrees Celsius - to make sure the company's compensation technology can remove all signs of burn-in patterns. IGNIS's Max Life technology combines a functional in-pixel compensation pixel circuit with a sensing line and the company's current measurement driver chip that can perform external compensation.

Japan-based printed OLED developer JOLED demonstrated several new OLED displays at Finetech Japan last week. We already posted on these new OLEDs, and now we have photos of the new panels.

So first up is JOLED's first OLED TV panel. The 55" 4K (3840x2160, 80 PPI) panel offers a 120Hz refresh rate and a color gamut of 100% DCI (135% sRGB) and is printed on JOLED's Transparent Amorphous Oxide Semiconductor (TAOS) backplane.

The following is a sponsored post by Shaanxi Kuntech Semiconductor Technology

The press conference for the landing and launching of Shaanxi Kuntech Flexible Semiconductor Service Manufacturing Base Project was grandly held in West Fengxi New City, West Xian Xin New District, Shaanxi province on the morning of October 16, with its theme being "Shinning Shaanxi and Shaping the Future World".

A number of Chinese government leaders, partners from home and abroad, as well as the media attended the event, where the duo direction foldable AMOLED display with internal and external folds developed by the R&D team was also displayed.

As expected, Apple launched three new smartphones. The 2018-2019 lineup includes the OLED iPhone XS and XS Max and the iPhone XR which uses an LCD display.

The iPhone XS is the successor to the iPhone X - this phone sports a 5.8-inch 1125x2436 flexible notch-type AMOLED display (produced by Samsung Display), 4GB of RAM and 64/256/512 GB of storage.

IHS posted an interesting article which details a new backplane technology that Apple is developing. So-called Low-Temperature Polycrystalline Oxide (LTPO) combines both LTPS TFTs and Oxide TFTs (IGZO, Indium Gallium Zinc Oxide). LTPO is applicable for both OLED and LCD displays.

In LTPO, the switching circuits are using LTPS while the driving TFTs will use IGZO materials. This could lead to a power saving of around 5-15% compared to the currently-used LTPS backplanes. The main drawback of LTPO, however, is that the IGZO TFTs are larger and so the display density may be compromised. IHS says that Apple may introduce this into future iPhones - but it also says that LTPO will be limited to low-density displays at first which is a bit confusing.

Photonics-based solutions provider Coherent reported its financial results for Q2 2018. Revenues were $482.3 million and a net income of $67 million. Coherent says that demand for OLED displays remains robust, but market growth remains hindered by pricing and availability.

Coherent sees this as a short-term dynamic, and once OLED producers will be able to compete with Samsung, this will change. Coherent says that 2019 will be another slow year, but investments will return in 2020. Coherent estimates that fiscal 2019 (which ends on September 2019) will likely be down 15% to 20% before recovery starts in fiscal 2020.

In January 2018 Sharp's CEO announced that Sharp aims to begin commercial production of flexible OLED displays for its own smartphones in Q1 2018. A new report from Taiwan says that Sharp is progressing with its OLED plans.

Digitimes now says that Sharp has converted some of its capacity at its 4.5-Gen Taki plant from LTPS LCDs to OLED displays. The Taki Plant had a total capacity of 90,000 monthly substrate, and a third of that capacity was converted to OLEDs (but rate will be slower for OLEDs - 22,000 monthly substrates). It is not clear whether Sharp actually started producing OLEDs already.

In May 2017, Google announced that it has partnered with "one of the leading OLED makers" to develop a high-end VR display. Google is now set to demonstrate this display at SID 2018 in May.

The new Google-designed display is a 4.3" 18Mp (1443 PPI, probably around 5500x3000 resolution) VR display featuring a refresh rate of 120 Hz. This will be the highest-density OLED display ever (not counting OLED-on-silicon microdisplays). Current VR AMOLEDs in production reach only about 600 PPI.

We have many rumors lately regarding Apple's OLED iPhones - mainly that the iPhone X sales are disappointing and Apple is considering discontinuing its 5.8" OLED iPhone range in 2018 and only releasing a larger 6.5" model this year.

Photonics-based solutions provider Coherent reported its financial results for CYQ4 2017 and as Coherent supplies laser equipment for FPD makers, it is usually a good indicator to the OLED market expansion stages. According to Coherent, there has been no real change in the timing of equipment shipments, and the company did not notice any hesitancy among display makers in china regarding the scale up of new OLED fabs. In fact the company says that the "momentum that is behind OLED seems to be quite strong and quite sustainable over a long period of time".

US-based Solar-Tectic has launched a new low-temperature OLED backplane technology that could replace LTPS in future high-end mobile OLED displays and bridge the performance gap between IGZO and LTPS.

Solar-Tectic process, called LT1CS (Low temperature single crystal silicon) is a silicon based technology that creates highly oriented c-axis aligned or "textured" silicon crystals. Solar-Tectic says that the performance of LT1CS backplanes will be higher than IGZO performance. The company says that process is similar to SEL's CAAC-IGZO only based on silicon and not IGZO.