P-177: A 14.1-in. Full-Color Polymer-LED Display with a-Si TFT Backplane by Ink-Jet Printing

Abstract

We have developed a 14.1 inch full color polymer LED display, based on an a-Si TFT backplane, using ink jet printing, which does not show visible swathe marks during display operation. To remove the swathe marks, we have developed the single path printing technology for the hole-conduction layer deposition to significantly reduce the complexity of interlacing printing across the panel, which is known as an alternative to remove the swathe marks. In addition, we have adopted the interlayer process to increase the lifetime of ink jet printed displays. These technologies will enable the scale-up of the ink jet printed AMOLED applications to larger size displays, such as desktop monitors and TVs.

A Conjugated Polymer for Near Infrared Optoelectronic Applications

“…In the light generation group, important applications include lasers [1] and polymer light-emitting diodes (PLEDs) [2] for full colour displays [3] or energy-efficient generation of white light. [4] In the light harvesting group, the current main focus is on developing polymer solar cells for production of electricity.…”

Real RGB printing AMOLED with high pixel per inch value

“…Hard to find proper fine metal mask (FMM) is the biggest issue for evaporation process . Currently, the best method to achieve high‐resolution AMOLED without FMM is printing process . However, printing process is more suitable for resolution lower than 200 ppi (pixel per inch), because the inkjet droplet volume from the nozzle head is too large and adjacent pixels are easy to be bridged .…”

“…1 Currently, the best method to achieve high-resolution AMOLED without FMM is printing process. [2][3][4][5][6][7][8] However, printing process is more suitable for resolution lower than 200 ppi (pixel per inch), because the inkjet droplet volume from the nozzle head is too large and adjacent pixels are easy to be bridged. 9,10 In this report, a six-leaf-grass shape pixel arrangement was designed to increase the resolution with current printing process.…”