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[iMiD 2017] LG Display, Spur Development of 77 inch transparent flexible OLED

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LG Display’s Kwon Se-Yeol senior researcher introduced the 77-inch transparent flexible OLED which had been introduced in June at IMID 2017 held in BEXCO, Busan on Aug. 30, and announced the applied technologies to realize this.

Kwon Se-Yeol senior researcher mentioned, “OLED is self-luminous, so it can be manufactured with a thin thickness because it does not need a back light unit. The thinner the thickness, the more flexible the OLED can be so that it is easy to implement flexible displays with OLEDs.” and forecasted. “It can be used in various fields such as signage and smart desk.”

The 77-inch transparent flexible OLED which is released this time is a top emission type for improved luminance. The transparent thin film encapsulation layer is applied, different from the conventional OLED TV or large flexible OLED, and two polyimide substrates are used.

Kwon Se-Yeol senior researcher said “We applied a transparent thin-film encapsulation layer instead of the existing metal encapsulation layer for the top emission method ” and explained “A white OLED light emitting layer and a color filter layer were formed on two polyimide substrates and cemented together. A barrier film and a multi-barrier were applied to the top and bottom of the polyimide substrates to prevent moisture and oxygen penetration.”

The Kwon Se-Yeol senior researcher then states that “flexural rigidity of the panel is mainly affected by the thickness of the polarizer and the encapsulant layer, so it is necessary to reduce the thickness in order to improve the flexibility”, and emphasized “By reducing the thickness of the encapsulant layer from 100 μm to 20 μm, we can reduce the strain on the OLED module from 0.36% to 0.21%, along with improved flexibility”.

In addition, he mentioned that surface reflection due to polyimide birefringence phenomenon, laser wavelength selection according to polyimide properties in LLO (laser lift off) process, and use of flexible OLED module are all covered, and technical development is continuing.

Meanwhile, LG Display has developed the world’s first 77-inch transparent flexible OLED with UHD (3840 × 2160) resolution, transmittance of 40%, and radius of curvature of 80R as part of the national project.

LG’s 77 inch OLED TV at KRW 40 Million, Is the Price OK? Comparison with Competitors…

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출처=LG전자

LG`s 77 inch OLED TV Picture Source = LG Elec.

Hyunjoo Kang / jjoo@olednet.com
LG Electronics recently announced 77 inch OLED TV, and its factory price at KRW 41 million received much attention. With the diverse public opinions regarding this, OLEDNET looked into price trend of TV of similar size.
According to UBI Research, Samsung Electronics’ 78 inch SUHD TV product is being sold at USD 7997.99 ~ 9997.99 (lowest price at Amazon). Released in April, these products utilize quantum dot film attached LCD panel.
For Sony which uses LCD, 75 inch product released in January costs approximately KRW 6.7 million as of July, and 85 inch product costs approximately KRW 9 million. Sony products are less costly than Samsung and LG products.
The actual market price of LG Electronics’ 77 inch OLED TV is not yet exactly known. However, the comparison with its factory price of KRW 41 million shows it is about 4 times more expensive than Samsung Electronics’ 78 inch product and Sony’s 85 inch product.
Compared to LCD TV, existing large OLED TV of same size is about twice as expensive. Although the gap has been recently reduced, this is due to LG Electronics’ OLED TV price reduction. While it is true that OLED TV is pricier, that does not mean it is not marketable. In fact, LG Electronics announced that Q2 2016 OLED TV sales increased by 4 times compared to previous quarter through conference call.
However, some believe that the fact the difference is approximately 4 times, rather than twice, will bring down the competitiveness. Regarding this issue, Choong Hoon Yi of UBI Research explained that considering that the yield drops rapidly as the size increases, the price of LG’s 77 inch new product is not totally out of order. He added that the price will drop with yield improvement, and looking at TV market trend so far, the market price could eventually be half of the factory price.
LG Electronics’ 77 inch OLED TV could fall to about KRW 20 million from KRW 41 million, reducing the price gap against LCD TV of similar size to approximately 2 times. Yi further added that despite being twice as expensive as LCD TV, OLED TV has been solidifying its position in the market.