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Foldable Phone Cover Window Material Competition To Heat up.

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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.

Samsung Display, the market will move to Full Screen next to Edge

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At 2016 IMID Business Forum having been held in Samsung-dong KOEX on October 26th, Senior Park Won-sang of Samsung Display expected that full screen market would lead next to Smart phone of edge designs.

Senior Park analyzes that mobile market will be core market of Display industry by saying “Super high-speed growth of Mobile market is being continues, and mobile market is expected to exceed TV market after 2016, following IT and TV.”

Specially, Senior Park Won-sang states that DA (Display size vs. set size, Display size/set size value) becomes important because Smartphone is portable and has limitations in sizes, and full screen Smartphone having DA of over 90% will lead the market after being released.

In addition, he emphasizes low electricity, sensor embedded, high solution, eye friendly etc. as core technology of mobile display, and stresses that AMOLED belongs to the display for most suitable mobile appliances.

On the other hand, the report “Key issue and Market Analysis for Foldable OLED’ having been published in August by UBi RESEARCH predicts that full screen AMOLED panel will be released first in 2017, and it overpasses flexible AMOLED panel market of Bezel Less type while occupying 60% of total flexible AMOLED panel market in 2020.

<Samsung Display announcement date, 2016 IMID Business Forum>

<Definition and Market share prospect by flexible OLED type (Source: UBi RESEARCH)>

[IFA2016] What is the exhibition concept of Samsung Electronics TV?

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Samsung Electronics TV Booth displayed in IFA2016 is very different from before. There are two types of LCD TVs in the market currently: the existing TV using LED BLU, and SUHD TV that uses quantum dot sheet. However, the product that was introduced and occupied a lot of booth exhibition space was the inorganic TV that uses quantum dot display, a product with unclear release date.

The conceptual inorganic TV that Samsung Electronics introduced instead of actual TV product is a product that displays far superior performance to OLED TV. As time goes by, the “organic” that represents OLED TV loses its function as a TV due to its rapidly decreasing brightness, whereas “inorganic” does not undergo such changes. If this is true, it is an excellent product that may well be used forever.

In another concept exhibition, Samsung Electronics introduced the superior color purity of Inorganic TV.

The light coming from the Organic TV light source has very vague RGB. In contrast, inorganic TV originates from clear RGB. Inorganic creates independent wavelength and intensity even before this light arrives at the color filter, whereas organic still displays a vague light with separated color.
The structure of inorganic TV seen from this is assumed to be a form in which a quantum dot substance is inserted between the screen and the color filter.

Finally, the light of organic, which goes through the color filter, lacks color purity of the three primary colors because it converts two-wavelength light with blue and green-red to three-wavelength.
However, even before arriving at the color filter, the light with superior color purity is emitted outside in inorganic.
If these two exhibitions are true, Samsung Electronics is preparing an incredible next-generation TV.
The problem pointed out by the participants is that this technology has not been born yet, and it is merely a concept. Samsung Electronics has described the unknown world with confidence, which is ironically viewed as if they are utterly unprepared for the future TV.

Moreover, by comparing OLED TV with a TV technology of the future instead of the SUHD TV currently in the market, they have indirectly admitted that OLED TV is better than the SUHD TV that uses quantum dot.

In IFA2016, Samsung Electronics wanted to show that SUHD TV will continue to grow and that OLED TV will disappear eventually. However, they have admitted that they are in an urgent situation in which, due to the superiority of OLED TV to the current SUHD TV, it cannot avoid being compared to the inorganic TV of the future.

Finally, whatever is done to LCD TV, black should be avoided, because it is LCD.