34.2: Invited Paper: Transparent Emissive Thin‐Film Electroluminescent Display

Abstract

A 6" diagonal 320x240 transparent matrix TFEL display has been developed. An areal luminance of 280 cd/m 2 has been obtained. The performance is compared to a standard TFEL display of the same size, but with non reflective metal row electrodes.

Actively transparent display with enhanced legibility based on an organic light-emitting diode and a cholesteric liquid crystal blind panel

“…So far, various approaches to transparent displays have been reported including transparent inorganic electroluminescent device [1,2], transparent plasma display panels [3][4][5], microelectromechanical/ electrowetting based transmissive displays [6,7], and transparent organic light emitting diodes (TR-OLEDs) [8][9][10][11]. Among such transparent displays, those based on OLEDs are considered as most promising because active layers comprising OLEDs are mostly based on very thin layers of wide-gap materials that are highly transparent.…”

Transparent OLED Displays

“…Transparent electroluminescent (EL) displays based on inorganic phosphors were proposed several years ago [3]. However, they have fundamental shortcomings such as high operating voltages ($200 V) and low levels of achievable brightness ($100 cd m À2 ), limiting their day-time visibility.…”

“…A Li doped bathophenanthroline (BPhen) layer has been chosen for the injection of electrons. The emission zone consists of a 1,3,5-tris(phenyl-2-benzimidazolyl) benzene (TPBi) layer doped with 7 vol% of fac-tris(2-phenylpyridine) iridium [Ir(ppy)3 ]. As hole transport material 4,4 0 ,4 00 -tris(N-carbazolyl) triphenylamine (TCTA) is used.…”

Highly efficient transparent Zn2SiO4:Mn2+ phosphor film on quartz glass

“…Transparent displays have attracted great interest because of their great need in car navigation systems and decoration lighting devices [1]. Nontransparent displays hinder one from seeing some objectives through them, and reduce sightlines.…”