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. 
<’Galaxy
Z Fold3’ Expected Structure ©2021 UBI
Research>
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