26‐1: Invited Paper: Challenges in QD‐OLED Display Technology

Abstract

OLED technology has changed the display landscape remarkably. Now the next generation, QD‐OLED, is reaching the consumer TV market. At its heart, the quantum dot pixelized color convert (QD‐PCC) represents a fundamentally new component with materials and processes yet to be developed and scaled to reach the performance and reliability criteria for a commercially viable mass production. This communication will review critical hurdles encountered during the fabrication of such a color converter with a particular focus on the use of ink‐jet printing to deposit the optically active components. Smart material solutions will be reviewed explaining how they can help to overcome technical challenges and facilitate processing in an industrially viable environment ultimately enabling the cost‐effective commercialization of this promising new display technology

12‐3: Materialization of Mid‐Resolution Quantum Dot Color Converters on G2.5 TFT‐LCD Production Line for Micro‐LED Displays

“…The IJP process proves material-efficient and cost-effective, and Samsung's use of IJP for QD-OLED fabrication has demonstrated feasibility in mass production for low-resolution applications, specifically at <100 pixels per inch (PPI). 4 Notably, the photolithography method is typically employed to fabricate an empty matrix before the IJP process. For low-resolution applications, a white bank with low optical density (OD) can be used in matrix fabrication to mitigate inter-pixels crosstalk.…”

“…Meeting the specification of OD > 1 at 10 m is sufficient. 4 Therefore, for the current development of low-resolution micro-LED displays, this optical design is widely adopted. However, for mid-resolution applications like smart watches, cell phones, notebooks, and vehicle displays with pixel densities ranging from 100 to 400 PPI, the low OD of a white bank may not adequately prevent inter-pixel crosstalk due to smaller inter-subpixel distances (less than 20 μm).…”

High‐precision and high‐stability inkjet printing technology for QD color converter‐type micro‐LED display

“…A color conversion layer is used to convert an emission wavelength of blue to red and green are used. Regarding a color conversion method, a lot of developments using quantum dot (QD) materials are being actively done 2–5 . Furthermore, the development of display devices that make QDs self‐luminous is also active, and the use of QD materials is progressing 6–12 .…”

“…Regarding a color conversion method, a lot of developments using quantum dot (QD) materials are being actively done. [2][3][4][5] Furthermore, the development of display devices that make QDs selfluminous is also active, and the use of QD materials is progressing. [6][7][8][9][10][11][12] It can control a color to be converted by a size of a QD particle.…”