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Samsung Display continues to dominate the OLED market for foldable phones

Foldable OLED shipment forecast

Foldable OLED shipment forecast

According to the ‘2024 Small OLED Display Annual Report’ recently published by UBI Research, OLED shipments for foldable phones are expected to increase from 27.4 million units in 2024 to 52.7 million units in 2028.

According to the report, Samsung Display’s OLED shipments for foldable phones in 2023 will be 13.4 million units, a 6.3% increase from 12.6 million units in 2022. Also, among Chinese panel makers, BOE shipped 6.2 million units of OLED for foldable phones, more than three times the 1.9 million units in 2022, while TCL CSOT and Visionox each shipped 1.1 million units of OLED for foldable phones.

Although there is fierce pursuit by Chinese companies, Samsung Display is expected to still take the lead in the foldable phone market. Samsung Electronics, to which Samsung Display supplies panels, is expected to expand the models of the Galaxy Fold series scheduled to be released this year, and Samsung Display’s foldable phone panels are expected to be applied first to Apple’s foldable iPhone to be released in the future. Based on such technological prowess and competitiveness, Samsung Display’s dominance in the foldable phone market is expected to continue for the time being.

▶ 2024 Small OLED Display Annual Report Sample Download

Foldable Phone Cover Window Material Competition To Heat up.

Ahead of Samsung Electronics’ unpacking event, interest in the foldable phone cover window material is hot. There was a concerned surprise that the Galaxy Fold, which was scheduled to be released in the first half of last year, was delayed for several months due to the tearing issue of the protective film. This year’s concern is whether Ultrathin Glass (UTG), which has emerged as a substitute for Colorless Polyimide (CPI), can be mass-produced without major issues.

Samsung Electronics will release the Galaxy Z flip known as “Clamshell” in the first half of this year and the Galaxy Fold 2 known as “Winner 2” in the second half of this year. The Clamshell is known to adopt UTG. This material is advantageous in terms of the hardness required for the use of the S Pen, the luxurious visibility and the soft touch unique to the glass. Moreover, the major reason for adopting UTG is known to remove wrinkle at the center of the screen, which has been pointed out as a disadvantage of CPI.

Prior to adopting UTG, Samsung Display invested $ 40.8M in Dowooinsys, UTG maker, and became the largest shareholder with 27.7% stake. The intention is to secure the stable supply of UTG and reduce its dependence on Japan for major materials.

<Ultrathin Glass (UTG) (Source : Dowooinsys homepage)>

However, there are also concerns about the adoption of UTG. Schott, AGC and Corning are also developing the product and they can produce substrates with a thickness of about 100 mm by the floating method or the slit nozzle method. To make it even thinner, Dowooinsys uses hot drawing or HF etching. The thickness of UTG to secure durability is believed to be 100 mm or more and with this thickness, the radius of curvature is about 2 ~ 3mm (~1mm for CPI), which reduces design freedom of the foldable phones. To improve durability, the UTG surface is coated with a polymer resin, which also prevents glass fragments from scattering when broken. The current problems of UTG are that mass production and yield are not yet secured due to the difficulty of the process, and that there exist traumatic worries on unexpected durability issues when released to the market.

Meanwhile, CPI material companies, which have been threatened by the news that UTG will be adopted for Clamshell, are also preparing to fight back. In order to remove the changeable window film (protective film) of PET material applied to Galaxy Fold, they are increasing the hardness of the hard coating on the CPI and developing a functional coating to give a glassy gloss. In particular, Dongwoo Fine-Chem, which did hard-coating on the CPI for Galaxy Fold, is known to simplify the process by developing hard coating materials including antifouling function. With all efforts added up , the CPI cover window structure is changed from the first generation foldable phone (PET + COA + CPI + COA) to the second generation foldable phone (CPI + COA), enabling the thickness to be reduced from about 200 mm to half, and the material cost and the process to be reduced.

<2019 Released Samsung Galaxy Fold Structure (Source: UBI Research Report)>

<Structure Prediction of the Samsung Galaxy Fold Follow-up Models: When Using UTG (Left) and CPI (Right) (Source: UBI Research)>

In addition to Sumitomo Chemical, which supplied to Galaxy Fold, Kolon Industries and SKC are also preparing for mass production of CPI. While UTG adoption seems to benefit to Clamshell with small screens, CPI is advantageous for larger screen sizes. UTG must make up for durability at the thickness retaining design freedom, and secure mass production system and price competitiveness through process improvement. CPI should strive to improve the hardness and appearance close to glass, and also increase price competitiveness. The material selection criteria will vary with the foldable phone models and customer response. Therefore the customer response for the Clamshell will be an important step in the future direction of the foldable phone cover window material. The market for the material is expected to grow rapidly, reaching $ 429.6M by 2023. The competition between UTG and CPI to take the market first has now begun.

OLED Daily Issue, April 22, 2019

▶ OLED is also worried about oversupply…” China factory size, twice that of Korea.” (YONHAP NEWS)

(Full text of articles: https://www.yna.co.kr/view/AKR20190419148900003?input=1195m)

Following LCD panels, there are predictions that oversupply can become a reality for OLED panels.

Concerns are growing as South Korean companies plan to grow OLEDs into new “cash cow” instead of LCDs that China has taken the lead.

According to a recent report released by Hana Financial Management Research Institute on 21th, the number of OLED panel factories currently under construction in China is 419,000 sheets per month, about twice the amount of 225,000 sheets per month, which is the size of South Korea’s expansion.

According to the report, China’s BOE, which ranks first in LCD panel market, is going to increase its size to 144,000 panels. In addition, Chinese panel manufacturers such as CSOT, Visionox, and TCL are also scrambling to expand their facilities on a large scale.

Among South Korean companies, LG Display is set to operate its 90,000-unit monthly plant in Guangzhou, China, and it is expected that there will be a total of 45,000 panels per month in Paju.

Industries predict that size of OLED plant that will be built by Samsung Display in Tangjeong, South Chungcheong Province, will reach 90,000 sheets per month.

“As speed of expansion of OLEDs in South Korea and China is much faster than rate of increase in demands, there is a high possibility that oversupply will worsen.” said Joo-wan Lee, a researcher.

 

▶ The screen shield that caused controversy over faulty Galaxy folds…Why do I need it? (Yonhap news)

(Full text of articles: https://www.yna.co.kr/view/AKR20190421010700017?input=1195m)

Samsung Electronics’ first foldable Smartphone was embroiled in controversy over its screen defects even before it was released. Samsung Electronics explains that this happened because early users removed “screen protection film,” which can be misunderstood as screen protection film.

<Samsung Electronics [Samsung Electronics Co., Ltd.]>

According to industries on the 21st, current Smartphones are going to protect displays by attaching cover windows with reinforced glass material on top of OLED display panels.

OLED panels themselves are very thin like vinyl and are weak against external shocks. Plastic OLED (Plastic OLED) that is used for foldable Smartphones is more vulnerable to scratch. However, it can’t put glass, which is a material that doesn’t fold, so it is finished by applying film of plastic material.

“Although screen protection films that we already know are additional products that prevent scratching, protective films that are used for flexible displays are very important for displays.” said Professor Hak-seon Kim of UNIST, who is a former vice president of Samsung Display. Ok-hyun Jeong, an electronic engineering professor at Sogang University, also said, “The fact that we took out a protective film from PLED is tantamount to ripping off the display parts themselves.”

OLEDs emit light as organic materials, and due to their characteristics, they are very susceptible to oxygen and moisture components. When a thin panel itself is subjected to strong pressure during a screen’s opening, it can cause the screen itself to become indigestion due to moisture in an empty space.

Plastic has a weaker hardness than glass, making it easier to scratch the surface.

In addition to screen glitches, the media that received Galaxy Folders for review such as Bloomberg and Derverge points out that the protective film is easily dented or scratched. One reviewer said, “I tapped the screen with my fingernails, but there are still permanent marks.”

Some point out that there is a gap between the protective film and the display, which makes it easier for dust and others to get rid of it. One reviewer suggested a photo showing the gap between the screen’s protective screen and bezel, suggesting that it could be misleading.

Due to this reason, Samsung Electronics explained that its screen shield is for ‘replacement’. Since there is a higher chance of damage such as scratch than conventional glass, they were made so that they could be replaced at that time. However, users should not replace them directly and go through a service center.

Experts point out that such precautions should be sufficiently notified to consumers before the launch, and that early users also need to follow basic precautions as they use first-generation products.

Jeong said, “Samsung Electronics seems to have lacked notice of screen protection. “We need to strengthen advance notice when it is officially released.” said a person who dropped it from the company, which is about 100 grams more than normal Smartphones, risks further damage when it is dropped from the same location. This part also requires the user to pay attention,” he pointed out.

“Since the film itself is a plastic material, even if it is attached with protective film, it can be pierced and torn if exposed to sharp needles, unlike glass,” Professor Kim said. “In fact, these precautions should be properly introduced when selling it.”

 

▶ SK is investing in OLED business? (etoday)

(Full text of articles: http://www.etoday.co.kr/news/section/newsview.php?idxno=1747027)

SK Corp. is considering investing into OLED material business. As OLED markets are rapidly growing, industries that are made of OLED materials are also increasing.

According to mid- and long-term management plan data that SK Corp. held a corporate briefing for analysts of securities companies on Wednesday, SK Corp. is also reportedly considering investing in OLED materials to expand its material business.

SK Corp. has set a mid- and long-term strategy for its material business to expand its high-growth area by utilizing its current material platform.

For OLED materials, LG Display is planning to develop its own technologies by linking current SK Trichem’s technologies such as precursors and others while also considering investing in them.

Industries predict that SK Corp. will be able to expand its business through investments as it is an investment-type holding company.

For battery materials, which are planning to enter markets with high-entry barrier materials through partner companies’ cooperation and investment in technology holding companies, it has quickly entered the market by investing 270 billion won into shares of related companies.

SK Corp. previously acquired the stake in Watson, China’s No. 1 company that manufactures the second-order essential part of the battery, in November last year.

A reason why SK is showing interest in OLED markets is because OLED markets are growing rapidly.

According to a market research company called Ubi Research, size of OLED display market was estimated to be $28.31 billion (31.9568 trillion KRW) last year, which is a 7.1% increase year-on-year and is expected to grow to $32.3 billion (36.457 trillion KRW) this year.

It is expected to grow to $59.5 billion by 2023.

As a result, many other companies are working on OLED materials. Earlier this month, LG Chem stepped up its related business by acquiring material technology for “Solid Organic Light Emitting Diodes,” a key platform for next-generation displays, from DuPont in the U.S.

Doosan also established a new company through division of its business sector to strengthen its material businesses such as OLED.

“We have no specific plan to invest in OLED materials yet.” said a representative for SK Corp.

[MWC 2019] The new form factor, foldable phone wars heat up

Reporter : Daejeong Yoon

Smartphone makers are promoting the new form factor, foldable phones at MWC 2019 started on February 27 and it runs until 29 in Barcelona Spain.

The show is buzzing with products from big-name tech companies, including Samsung Electronics and Huawei,TCL, LG Electronics being unveiled. That includes a variety of phones with foldable screens.

Samsung unveiled foldable phone ‘Galaxy Fold’ to customer, highly touted at the Samsung Galaxy unpacked event.

In folding ‘Galaxy Fold’ features a 7.3-inch QXGA + resolution OLED screen and it was built to be compact size with 4.6-inch HD + resolution OLED when folded.

And Huawei announced its own foldable phone “Mate X” uses roll out foldable technology, it is surrounded by a 6.6-inch main OLED on the front and a 6.38-inch on the back. It is 8.7 inches when it is opened, 1.4 inches bigger than Samsung Electronics’ Galaxy Fold.

Mate X’s front display has 2480 × 1148 resolution with a 19.5: 9 aspect ratio. The back OLED has a 2480 × 892 resolution with a 25: 9 aspect ratio. When you flip it open, the resolution is 2480 × 2200 with an aspect ratio of 8: 7.1. .

Also, TCL announced the prototype device uses the company’s proprietary “DragonHinge” mechanism to fold and unfold the screen, it has 7.2-inch screen.

According to TCL, this device will build a production version that is slated for release by 2021.

Lastly, LG showed off V50 which is similar to a folding phone, it does have an optional case with a whole second screen on it. With two near-identical phone displays next to each other, the functional split-screen allows multitasking and gaming easily.