July 2021 | OLEDNET

According to the ‘2021 OLED Components and Materials Report’ recently published by UBI Research, the ‘Galaxy Z Fold3’, which is expected to be released by Samsung Electronics in August, has UPC (under panel camera) and pol-less (or color filter on) encapsulation, COE) and S Pen technology are expected to be newly applied.

First, UPC, a technology that realizes the full screen of a smartphone by placing the front camera under the screen, has been mentioned using a transparent PI substrate and various technologies such as laser patterning, but in the end, the cathode electrode is patterned with a laser and the resolution near the camera is different. Thus, it seems that the maximum transmittance was secured. It is analyzed that the transparent PI substrate was not applied to the mass production process due to the high process temperature of the TFT.

Although many panel makers have developed pol-less technology, which replaces polarizers with color filters and low-reflection technologies, they could not be applied because they did not show as much anti-reflection effect as polarizers. The polarizing plate is effective in preventing external light reflection, but reduces the amount of light emitted from the OLED light emitting layer by more than 50%. If the polarizer is removed, more light can be emitted with the same power to the outside, so if the same luminance is implemented, battery consumption can be reduced. Samsung Display seems to have implemented pol-less technology by applying color filters, low-reflection films, and black pixel define layer (PDL).

The S Pen is finally applied with an electro-magnetic resonance (EMR) method, and the 30 um thick product used in the previous work is expected to be used as it is for the UTG. The AES method, which does not require a digitizer, was also considered due to the flexibility issue of the digitizer made of metal, but it is expected that the S Pen will eventually be applied in such a way that the digitizer is located on both sides of the panel.

The ‘2021 OLED Components and Materials Report’ published this time includes not only the development trend of foldable OLED, but also the development trend of mobile devices and materials for TV. It is expected to be of great help to related companies.

Of the 122 OLED smartphones released in the first half of 2021, 119 6-inch smartphones were released, occupying an overwhelming share of 97.5%. Compared to the 6-inch smartphones released in 2018, which accounted for 78% of the total, it has become the mainstream of the smartphone market in just three years. One 5-inch model and two 8-inch models were released, and the 7-inch model was not released. The 5-inch model is Asus’ Zenfone8, the 8-inch model is Xiaomi’s Mi Mix Fold, and Huawei’s Mate X2.

By display design, hole model was released the most with 103, followed by notch model with 13 and narrow bezel model with 6. As in 2020, products with a home button were not released.

Looking at the distribution by resolution, 400~500ppi products were released the most with 64, accounting for 52.5% of the market share, 48 products with less than 400ppi and 10 products with more than 500ppi. The highest resolution product was Sony’s Xperia 1 II, which recorded 643 ppi.

In the display area (D.A), which is the ratio of the display to the size of the smartphone, products belonging to 80-90% accounted for 84.4%, 13.9% of those over 90% and less than 80% were not released. This is analyzed as a result of the disappearance of the home button and the continuous release of full-screen smartphones. The product with the highest D.A was 94.1%, which was occupied by Huawei’s Mate 40 Pro 4G, followed by Huawei’s Nova 8 pro in second place and Honor’s View40 in third place.

Finally, by country, China released the most with 104, followed by Korea with 12, Taiwan with 4, and Japan and Germany with 1 each.

Samsung Electronics widens the technology gap by applying new technology to ‘Galaxy Z Fold3’.

97.5% of 6-inch OLED smartphones released in the first half of 2021

영문 풋터