Samsung SDI Co Ltd exhibited a 40-inch OLED panel that features a full HD resolution of 1920 x 1080, a contrast ratio of 1,000,000:1, a color gamut of 107% NTSC and a luminance of 200cd/m2 (peak luminance of 600cd/m2) at FPD International 2008.
Though there were some vertical line defects, the panel appeared to have a luminance peculiar to OLED displays.
The driver board is a low-temperature poly-Si TFT, and it is made by the super grain silicon (SGS) technology to grow crystals without using a laser.
"Our low temperature poly-Si TFT mass-production line cannot make panels larger than 31 inches," a Samsung staffer said. "This 40-inch TFT panel is the largest size that can be made on our pilot line, and it cannot be mass-produced right away."
The RGB organic light emitting materials were formed by vapor deposition. The company used a fine metal mask (FMM). Fluorescent materials are used for red and green, while a phosphorescent material is used for blue, the staffer said.
"In order to reduce variations in luminance, the panel incorporates a circuit that equalizes the current in the screen," the staffer said.
It is a bottom emission type display with a microcavity structure employed to improve the color gamut.
Nikkei Electronics Asia magazine is available each month free of charge to engineers, managers and other qualified readers.
Nikkei Electronics |
Nikkei Monozukuri |
Nikkei Microdevices |
Nikkei Automotive Technology |
|---|---|---|---|
 |
 |
 |
 |
| The magazine for electronics designers and managers. | Design You Won't Regret - How to Reduce the Risk of Accidents | The most comprehensive technical journal for makers and users of LSIs and LCDs. | The comprehensive automotive technology magazine. |
Copyright © 1995-2009 Nikkei Business Publications, Inc. All rights reserved.
All editorial content and graphics on this Web site may not be reproduced in whole or in part without the express permission of the copyright owner.
November 2009
October 2009
September 2009