70.1: Invited Paper: Large-Sized Full Color AMOLED TV : Advancements and Issues

Abstract

We have demonstrated a 40‐inch diagonal, full color WXGA AMOLED TV. It was based on the technologies of amorphous silicon (a‐Si) TFT backplane and white OLED with color filter. Despite of recent technology advancement enabling high color purity, large‐sized AMOLED, a lot of problems to solve still exist to enter the large‐sized display market. Here, Samsung will discuss how far the technologies need to go for the marketplace of large‐sized display.

A study on full color organic light emitting diodes with blue common layer under the patterned emission layer

“…A full color OLED with the TBCL was selected as a control device, as it is a well-known structure to reduce the blue patterning step in the FMM process [12,13]. The device structures and schematic energy band diagrams are shown in Fig.…”

“…In particular, different sagging behavior between the glass substrate and the shadow mask and numerous impurities imported during the evaporation process are the major causes of the delay in successful launching of high-resolution and/or large-area displays [6]. To circumvent such problems of the FMM method, several alternative patterning technologies -such as ink-jet printing [7], laser-induced patternwise sublimation [8], laser-induced thermal imaging [9,10], radiation-induced sublimation transfer [11] and white OLED combined with color filter (CF) [12], -have been demonstrated. Among these, only the white OLED technology is being successfully applied in commercialization (e.g.…”

Non-doped, blue-emitting, color-stable, organic light-emitting diode based on 2,2′:6′,2″-ternaphthalene

“…An example is solid-state lightning [5][6][7], which holds great promise as an energy-efficient light source. Another example is the use of OLEDs for full color displays [8,9], which requires red, green and blue emitters of high color purity. As described in a recent review [10], the development of red and green emitters of sufficient quality did not pose too many problems but the performance of blue emitters often suffers from the wide band gap of the used materials.…”

Fluorescent‐based tandem white OLEDs designed for display and solid‐state‐lighting applications

“…Kodak and others have demonstrated large prototype displays with white-OLED emission and the RGBW format. 3,4 Apart from the ease of manufacturing large-area displays, there are other advantages of white OLEDs. For instance, the white OLED using the color-filter approach is seen as perhaps the only practical method to achieve very high resolution (>300 ppi) OLED displays because the color filters can be formed by conventional high-resolution lithography techniques.…”