Samsung’s QNED tech to use circular pixel electrode 

Samsung Display will use a circular electrode structure for the pixels of its QNED, or quantum dot nanorod LED, displays, a South Korean research firm claims.

UBI Research said Monday it analyzed 41 patents of the company, sorting out and analyzing the most complete of them, in a new report called QNED Structure and Production Technology Analysis Report.

QNED will be comprised of thin-film transistor (TFT), pixel, quantum dot (QD) and color filter (CF), the research firm said.

While the TFT structure are described as 2Tr on the patents, UBI Research said TFT for current drive requires at least three transistors and said it expected a 3Tr1C structure.

Pixel will also be comprised of nanorod LED and electrode in an optical structure to efficiently used the light emitted from the LED.

UBI Research also claimed the electrode structure of the pixel will be circular, contrary to claims made by other research firms previously that estimated it would be square in structure.

Some of the patents showed applying asymmetric wave on circular electrode improved LED’s directional arrangement, the firm said. Nanorod LED will use the same electrode for arrangement as well as as a driver.

The nanorod LED will also be made using gallium nitride (GaN) and emit blue light. It will have a size smaller than 1um x 10um. The surface of LED will be processed using insulating film and device aligners to reduce defects.

A Samsung Display spokesperson declined to comment on the matter.

Samsung Display last year said it will invest 13 trillion won by 2025 into developing QD Displays, with the earliest version of them launching in 2021.