サムスンディスプレイ、有機ELのBT2020最初に言及、有機ELの発光材料メーカーの課題が深まる

삼성디스플레이 발표자료

サムスンディスプレイ発表資料,  IMID 2016 Keynote Samsung Displayを発表

삼성디스플레이 발표 기사내용 사진

BT 2020を満足させるための各color別色座標開発の方向、Source:Galaxy S SeriesのAMOLED特性分析レポート

 

済州島ICCコンベンションセンターで開かれているIMID 2016イベントのkeynote sessionでSamsung Displayのキム・ソンチョル副社長は、ディスプレイのトレンドと、それに適したディスプレイはAMOLEDであると強調し、AMOLEDが解決しなければならない問題について発表した。

キム・ソンチョル副社長は、今年に何度も似たようなテーマで発表を行ったが、今回の発表では、AMOLEDの色座標もBT2020で進めなければならないと言及し、有機EL発光材料メーカーの課題が深まるものと予想される。

これまでのキム・ソンチョル副社長の発表では、有機ELの発光材料は、redとgreenだけがりん光が適用しており、blueのりん光の開発と適用が急がれる。blueのりん光が適用される場合、従来比の300%の効率向上をもたらすことができると、りん光blueの適用を重要課題として発表した。

しかし、今回のIMID 2016 keynoteでは、りん光blueの適用とともにBT2020に対して初めて強調した。

BT2020は、各color別、にR、G、Bの波長が630nm、532nm、467nmである色空間で、CES 2016でUHD AllianceによってUHD テレビに適用される色空間に採用された。

UBIリサーチで2016年5月に発刊した「Galaxy S SeriesのAMOLED特性分析報告書」によると、Galaxyシリーズの色座標はBT2020を満足させる必要があり、そのためにu ‘の場合、redの増加、greenで減少、blueで減少しなければならず、v ‘の場合はredで減少、greenで増加、blueで増加する方向に色座標の移動がなければならないと分析した。

Mobile機器のpanelの解像度と色座標は、テレビの開発方向をたどる傾向がある。UHD AllianceでBT2020を標準として採用しただけに、これに満足するmobile用AMOLED panelが作られるために、寿命と効率に重点を置いている有機EL発光材料メーカーの開発焦点が変わらなければならないものと予想される。

 

サムスンディスプレイ主席研究員「VR•ARが3Dテレビのようになる?」

サムスンディスプレイのイ・ジョンソ主席研究員が基調講演をしている。

Hyunjoo Kang / jjoo@olednet.com

サムスンディスプレイのイ・ジョンソ主席研究員は、「VR•AR市場は、過去3Dテレビ市場とは異なり、肯定的であるという観点を提示した。

8月23日、済州島済州ICCで開催された「インダストリアル・フォーラムで、イ・ジョンソ主席研究員は、「VR/ARのためのディスプレイ技術」というタイトルの基調講演で、VR•AR市場が過去3Dテレビ市場とおなじような道を歩くであろうと一角の懸念にについて言及した。

イ・ジョンソ主席研究員は、「3Dテレビ市場は、コンテンツ生産および3D転換技術の限界、3Dディスプレイの低品質、標準の不在などで活性化されなかった」とし、「しかし、VR・AR市場は、ポケモンGO、ホロレンズなど、すでにコンテンツとハードウェアが登場しており、数多くのメーカーがこの分野に参加している」と述べた。

Apple、マイクロソフト、インテル、facebookなど、屈指の企業がVR・AR分野のために積極的に投資しており、生態系が形成されているというのが彼の説明である。

イ研究員は、ゴールドマン・サックスの資料を引用して、「VR・AR市場は、2025年までに850億ドルの規模を形成するであろう」と強調した。

イ研究員は、さらにバーチャルリアリティ(VR)と拡張現実(AR)分野に有用な有機ELの技術的特徴を説明した。特に透明有機ELが拡張現実(AR)技術を具現するための核心ソリューションであると強調した。

彼はARについて「実際、物理的環境やリアルタイム画面に加わるデジタル経験である」と説明し、「透明ディスプレイがこれを具現してくれる」と述べた。

有機ELは、LCDに比べて透過率が高く、透明ディスプレイを作るための最適なソリューションとして考えられている。この研究は、「透明有機ELの具現のためには、高い透過率と低い抵抗のカソード(cathode)が必要であり、基板(substrate)が熱によく耐え、フレキシブルが可能でなければならない」と説明した。

また、透明ディスプレイの透明領域にメタル類を適用すると、ミラー(mirror)ディスプレイで具現され、鏡のような形としてもARを楽しむことができる。そのためには、高い反射率と高度の色域(high color gamut)が必要であるというのがイ・ジョンソ主席研究員の説明である。

TADF、今年の秋、有機ELカンファレンスで話題に… Cynora、メーカーを代表して技術力を強調

TADF is one of hot issues in OLED industry. (写真出典 : CYNORA)

Hyunjoo Kang / jjoo@olednet.com

済州島IMID 2016をはじめに今後有機EL関連のカンファレンスが本格的に開かれる予定の中、熱活性化遅延蛍光(TADF)技術が今回秋シーズンの有機ELイベントの熱い関心事の一つであると予想される。

Cynoraのような、この分野をリードするメーカーは、今年の秋の有機EL関連イベントを通じて、その技術力を積極的に公開する計画である。

現在、市販されている有機EL搭載製品は、ブルー発光材料の効率が低いため、ディスプレイのエネルギー効率に限界があるというのが問題として指摘されている。

核心的なディスプレイメーカーの間で、TADF技術はブルー発光材料の効率を高めるための代表的な方法として脚光を浴びている。

来る8月23日から済州島で開かれるIMIDと、28日からサンディエゴで開催されるSPIEカンファレンスでも、この技術に対する重要性が浮き彫りにされる予定である。

ブルー材料関連のTADFをリードするCYNORA GmbHは、今回のふたつの行事で、業界を代表してこの技術に関連する情報を発表する計画である。材料の開発から精密な機械工学に至る内容が用意されている。同社は5月、外部量子効率(EQE)が16.3%(100cd/m2条件)に至る濃紺色材料を開発したと発表した。

これと共に、韓国の成均館大学、日本の九州大学、中国の清華大学も今年の秋のカンファレンスを通じて、この技術に関連する学術情報を共有する計画である。

一方、9月末にサンディエゴで開催される有機EL World Summitでも、有機EL応用製品の消費電力を改善する技術が重要なテーマの一つであると予想される。

 

Just What is QLED…2019 QLED Mass Production is Garbage?

Source = Samsung Elec.

Barry Young Suggested “Don`t Believe the Garbage about QLED in 2019” (Source = Samsung)

 

Hyunjoo Kang / jjoo@olednet.com

An article by Barry Young, the managing director of the OLED Association, in Display Daily created much excitement in Korean display industry when domestic media picked up the story on 14 June. The article includes Young’s suggestion, “don’t believe the garbage about QLEDs in 2019”.

Clarifying this comment, experts unpack this to mean Young’s pessimistic outlook for QLED mass production in 2019 forecast rather than for QLED itself.

Barry Young discussed QD in an article titled Drinking the QD Kool-Aid in Display Daily. It is estimated that the comment is aimed at the recent speculation that Samsung Electronics will mass produce QLED TV as the next generation product in 2019 rather than OLED TV. While Samsung Electronics has not announced their official position regarding QLED TV mass production timing, some sectors within the market believe it will be possible by 2019. However, many have differing opinions.

QLED is a display that uses quantum dot for emitting layers’ host and dopant while maintaining the common layers used in the existing OLED. Quantum dot, emitting layer materials used in QLED, utilizes inorganic materials and can lower the production cost in comparison to OLED’s emitting layer materials. That the process does not require evaporation as it can be carried out through ink jet printing is another advantage, and some also believe that QLED color purity is superior to OLED.

Despite these, some experts point out that it is difficult for QLED to become the main force of the premium TV market, surpassing OLED, in a short time. QLED has to solve several technological issues including lifetime and emitting efficiency. When mass producing QLED, pin holes occur and reduce device lifetime, and as the hole and electron are not balanced the emitting efficiency falls. Furthermore, as even research has not been carried out regarding QLED lifetime and degradation, whether it will be commercialized by 2019 is also in question.

Meanwhile, Young refuted the argument that QD-LCD’s picture quality is superior to OLED. He proclaimed that QD Vision and Nanosys are making “very questionable statements” about how “OLED TVs were outperformed by LCD’s with QD enhanced LED backlights” without considering merits of OLED such as contrast ratio, viewing angle, response time, color accuracy, and form factor as well as luminance and color area.

Samsung, Even if OLED TV is Released, Different from LG

Hyunjoo Kang / Reporter / jjoo@olednet.com

<LG Elec. is Introducing OLED TV in CES 2016>

 

Within the TV market, there is an opinion that even Samsung Electronics which believes it is not yet the time for OLED panel cannot continue to insist on LCD. Experts estimate that even if it is the same OLED TV, Samsung Elec. will differentiate the actualization method from competitors’ including LG Electronics. One of the possibilities suggested is Samsung’s selection of ink-jet printed OLED TV panel.

 

Hyun-Suk Kim, Samsung Elec. Visual Display department’s vice president, who recently announced new LCD based SUHD TV mentioned that OLED TV is premature and also needs technological improvements.

 

However, it looks to be difficult for Samsung to insist on LCD TV only in the long term. China is threatening Korean companies in LCD panel market with superior price competitiveness; there is too much risk for Korean display companies such as Samsung Display to invest further in LCD production line. Although Samsung Elec. is not receiving panel supply exclusively from Samsung Display, Samsung Display is the biggest supplier. Therefore, Samsung Display’s LCD investment reduction is also expected to affect Samsung Elec.’s TV business.

 

Furthermore, Samsung Elec. is in the position of having to emphasize OLED’s superior picture quality over LCD in smartphone business, but highlight the opposite in TV. This is also an issue that needs to be tackled.

 

Despite these issues, Samsung cannot easily start on OLED TV as several problems such as price competitiveness have not been solved.

 

<Hyun-Suk Kim, Samsung Elec.’s Vice President, is Introducing New SUHD TV>

 

◆ Ink-jet Printing, Can it Solve OLED for TV Price Issue?

 

According to Dong-won Kim, analyst with Hyundai Securities, Samsung Display, with Samsung Elec. as the biggest client, has unfavorable structure for reducing production cost as 65 inch OLED TV panel production efficiency is low in Gen8 line.

 

Kim estimated that Samsung Display will apply solution process ink-jet printing technology to OLED TV with 2018 mass production target in order to solve this problem.

 

When producing OLED TV panel, WRGB OLED method, which uses evaporation method, can only reduce production cost by certain amount as the material usage efficiency is low. On the other hand, ink-jet printing RGB technology finely deposits ink in liquid form and can reduce materials cost. Additionally, RGB OLED has fewer organic layers compared to WRGB OLED and processes can be decreased.

 

For these reasons, some believe that Samsung will select ink-jet printing method rather than evaporation for OLED TV in future. There is also a view that LG Display, which is currently using evaporation method, will also actively consider producing ink-jet printed OLED TV panel in the long term.

 

A display expert explained that although ink-jet printing processes are simpler than evaporation method, that does not necessarily mean materials cost is always cheaper. The ink-jet printing technology is not yet perfect, and particularly for blue the efficiency issue has not yet been solved.

 

He added that Samsung Elec. has strong tendency to differentiate itself from competitors such as LG, and even if Samsung Elec. releases OLED TV, it is likely that ink-jet printing, which is different from LG, will be the preferred method.

Why is ‘Cadmium-free’ Significant? Samsung’s Quantum Dot SUHD TV

Hyunjoo Kang / jjoo@olednet.com

<Samsung Elec. Released 2nd Generation Quantum Dot TV. Source: Samsung Elec.>

On the subject of Samsung Electronics’ 2nd generation quantum dot display equipped SUHD TV product, recently released in Korea, display experts consider the actualization of 1,000 nit without cadmium as the key strength.

 

In 2015, Samsung Elec. first launched quantum dot SUHD TV under the name nanocrystal technology. Each quantum dot of nanosize, 10,000 times narrower than a human hair, actualizes accurate color.

 

According to Samsung Elec., the 2nd generation quantum dot technology to produce this new product, an improvement over last year’s. The company emphasized that compared to the previous product, the price was reduced and brightness was improved. HDR (high dynamic range) with 1,000 nit maximum was applied to the new product.

 

The 1,000 nit brightness is the standard figure of premium image produced in Hollywood, US. If this figure is high, screen’s bright and dark areas can be experienced fully even in bright environment such as a living room area.

 

Although not applied to all models of Samsung’s 1st generation quantum dot SUHD TV, 1,000 nit brightness was applied to the majority of the models; that 1,000 nit brightness was applied to the new product is not worth much attention by itself.

 

<Samsung Elec.’s 1st Generation Quantum Dot TV vs. Other Display in CES 2015>

 

◆Hazardous Heavy Metal Cadmium, Why Difficult to Remove?

 

Quantum dot film includes cadmium. As cadmium is a hazardous heavy metal, cadmium including quantum dot film cannot be environmentally friendly. Cadmium use in Europe is limited.

 

However, without cadmium, the quantum dot film’s optical efficiency is reduced. In order to make up for this, LED chips have to be applied which increases the price as well as the energy consumption. An alternative method to avoid this is development of additional quantum dot materials that increase efficiency.

 

For these reasons, some Chinese companies that produce quantum dot display equipped products select to use cadmium, overlooking the environmental issues. Samsung Elec. also emphasized that it is the only company that utilizes environmentally friendly cadmium-free quantum dot materials.

 

Through quantum dot materials’ efficiency and color mapping algorithm improvement, Samsung actualized 1,000 nit brightness without resorting to cadmium and without increase in power consumption. Color accuracy, which is a quantum dot display trait, was also improved by 25%.

 

Samsung Elec. is planning to release 14 models of SUHD TV, from 49 inch to 88 inch, in Korea. This is over 30% increase compared to last year. The price also was reduced by 900,000 KRW compared to the previous version. The new products, depending on the specifications, cost around 6 million KRW for 65 inch, and 4 million KRW for 55 inch.

A comment from a display expert is, “the new product has 1,000 nit brightness is not significant by itself, and color accuracy improvement also is not of much attention as it is an existing quantum dot trait”. However, he also put another comment from his analysis, “1,000 nit brightness was actualized without using cadmium and without decreasing energy efficiency is worth noting”.

CYNORA focuses on blue TADF-materials

During the 2nd OLED Korea Conference, the Germany-based CYNORA has presented its current status in blue TADF-based OLED-emitter development.

CYNORA focuses on materials that are able to convert triplet excitons into light via Thermally Activated Delayed Fluorescence (TADF).  While efficient emitters for red and green are already commercially available from other suppliers, there is still no blue OLED material available to match the strong demand for the industry. TADF technology is a promising candidate for highly efficient and stable blue emitter systems. TADF-based emitters offer up to four times better efficiency than currently used materials, which are based on fluorescence.

CYNORA has shown its current TADF-materials for sampling with good color points in blue (CIE 0.16, 0.17) and sky-blue (CIE 0.19, 0.36). The presented materials confirm that blue emission and high efficiency can be combined. CYNORA is focusing its current material development on vacuum-processing following the customer request, as represented in large investments into this deposition technology by the major AMOLED displays makers.

In order to provide more sample materials to customers, while reducing the cycle times for material improvements, CYNORA is growing its infrastructure. The company is extending the device testing capacity by setting up a new cluster tool and hiring continuous experts for the synthesis and device department. Due these actions CYNORA’s emitter throughput will increase significantly.

The strong interest from the OLED industry in TADF-based blue emitters systems has been once more confirmed at this UBI event and allowed CYNORA to further extend its network with the Korean OLED community.  The present expansion of CYNORA management operations, consistently sampling and improvement of blue OLED materials are further strengthening the position of CYNORA as a technology leader in the field of TADF emitter systems.

[The 2nd OLED KOREA Conference] AIXTRON Pioneers New Sector of the Evaporation Technology

At the 2nd OLED KOREA Conference (Feb 24 – 25), Juergen Kreis, Director of Business Development of AIXTRON, gave a presentation titled ‘Cost-efficient OLED’ and discussed AIXTRON’s evaporation process technology.

 

AIXTRON, an evaporation manufacturing equipment production company, bought Plasma Si situated in Silicon Valley in April 2015 to develop encapsulation technology. During the presentation, Kreis focused on organic layer evaporation technology OVPD, OPTACAP, and PVPD, a polymer thin film evaporation technology.

 

OVPD technology deposits the materials above the substrate using the shower head corresponding to the substrate area. Kreis revealed that OVPD technology allows for the optimized evaporation and can increase the material usage efficiency and productivity.

 

Regarding OPTACAP, Kreis emphasized that this is an encapsulation technology that forms multilayer thin film of high flexibility with low stress and cost. AIXTRON had previously announced that they are expecting to supply to a key Asian panel company in Q1 2016.

 

Kreis reported that PVPD is a technology that allows for the advantages of polymer materials and CVD process. He also added AIXTRON is currently continuing to research similar process technology with low process cost and high efficiency.

 

JDI Announces OLED Mass Production in 2018

Japan Display (JDI) officially announced OLED mass production. The press, including the Sankei Shimbun and the Nikkei, reported that on January 22 JDI revealed their plans to begin mass production of OLED panel to be used in smartphone from 2018.

 

JDI continued development with the aim of LTPS TFT and WRGB OLED technology applied high resolution AMOLED panel mass production for mobile device, and revealed the results through exhibitions in recent years.

 

In Display Innovation 2014 (FPD International) and SID 2015, JDI have presented 5.2 inch FHD flexible AMOLED panel. Particularly, in SID 2015, JDI showed a notepad equipped with flexible OLED panel.

 

JDI is likely to mass produce flexible AMOLED following the current mobile device market trend. Although the mass production technology was not mentioned, due to the client demands, it is estimated that either the RGB method, which is being used by LG Display and Samsung Display, or WRGB method, which is being developed by JDI, will be selected.

 

At present, only Samsung Display and LG Display can mass produce flexible AMOLED panel, but Chinese companies are fast in pursuit. There is much interest in how this JDI’s mass production announcement will affect the future OLED market.

 

JDI

OLED Frontier Forum’s 3rd Section Panel Discussion Summary

The 3rd section of the 1st OLED Frontier Forum (Jan 28), OLED’s Future, held a panel discussion with government, industry, and academia experts discussing OLED industry development strategy, such as next generation technology development, convergent areas, and personnel training, and future forecast. OLEDNET summarized the answers that each expert gave to the questions of the panel chair (Professor Changhee Lee, Seoul National University).

 

Jun-hyung Souk (Professor, Sungkyunkwan University)

For SDC mobile, as the OLED depreciation is ending the OLED production cost is becoming almost the same as LCD. If OLED related experts stay within Korean industry as well as the technology, Korea can continue to lead for 4-5 years. In order to achieve the continued leadership, differentiation through flexible R2R has to be carried out, as well as the materials and encapsulation technology development.

 

 

Sung-Chul Kim (CTO, SDC)

As a-Si is an existing technology, there is no room for further advancement. Sharp’s difficulty in panel business is due to lack of technology research on the panel. Because one technology can only be used for approximately 7 months, diverse technology development is required.

 

 

In-byeong Kang (CTO, LGD)

Fast organizations cannot but win. Therefore, rapid change to OLED from LCD is needed. As difficult is the technology, cooperation between academia and industry is needed. Now is the time when this cooperation for next generation technology development is more in demand. LGD is putting in much effort for OLED profitability.

 

 

Sung-Jin Kim (Vice President, Toray Advanced Materials Korea)

Cooperation between materials and manufacturing equipment companies is important in solution process materials development. Particularly, how to control dry process is an important issue. Also, Kim expects the current solution process materials development to show tangible results in 3-5 years.

 

 

Junyeob Lee (Professor, Sungkyunkwan University)

Solution process is favorable for materials optimization. From the initial concentration on polymer materials, recently small molecule materials focused soluble materials development is being carried out, and how to implement common layer is an issue. Emitting layer is using the small molecule materials that are being used as evaporation materials. The difference is the higher cost as the solvent is used. Also, as there is an issue (formulation problem) when used in large area, solution is required.

 

 

Kyoung-Soo Kim (Vice President, Korea Display Industry Association)

Expert acquirement is a key issue. Through upgraded cooperation between industry and academia, and industries, cooperation between panel, manufacturing equipment, and materials has to progress into a positive cycle. Also the open platform regarding new OLED application is needed.

 

 

Young-Ho Park (PD, Korea Evaluation Institute of Industrial Technology)

Flexible display competitiveness acquirement is a big concern. Programs for challenging R&D, and high added value product/technology development, and R&D infra establishment (highly cost-effective R&D) have to be considered.

 

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