51‐4: QLED‐on‐Silicon Microdisplays

Abstract

In this paper, a 0.47 inch active-matrix microdisplay with top-emitting monochromatic quantum dot light-emitting diode (QLED) array on silicon is demonstrated. A titanium nitride (TiN) is employed as the anode and the devices are fabricated by all-solution process. The driver chip is designed especially for QLED microdisplay. The demonstrated microdisplay exhibits a maximum brightness of 267 cd/m 2 and a gray level of 256.

A full high‐definition quantum dot light‐emitting diode‐on‐silicon microdisplay

“…Usually, aluminum (Al) or silver (Ag) is often adopted. [23][24][25] For these top-emitting QLEDs (TEQLEDs), the top priorities are to match the driving bias voltage of the integrated CMOS circuits and lower the power consumption at sufficiently high luminance. In other words, the TEQLEDs should feature a low turn-on voltage and a high external quantum efficiency (EQE).…”

“…The bottom electrode should be highly reflective in the visible range, with low surface roughness and a suitable work function to ensure the carrier injection. Usually, aluminum (Al) or silver (Ag) is often adopted 23–25 . For these top‐emitting QLEDs (TEQLEDs), the top priorities are to match the driving bias voltage of the integrated CMOS circuits and lower the power consumption at sufficiently high luminance.…”

“…Nevertheless, most QLEDs with high efficiency presented a small active area (~0.04 cm 2 ) in literature. Furthermore, for a very limited number of reports about QLEDoS, the brightness and efficiency were at low level, which even cannot surpass that of OLEDoS 25,26 . Therefore, it is necessary to optimize TEQLEDs with a large area to achieve the high performance of the QLEDoS.…”

25‐1: Invited Paper: OLED Microdisplays for AR/VR Applications: Technical Approaches Toward Realization of over 10,000 Nits Full‐Color Panels

“…Of the many display candidates, microdisplays have great potential as proper solution for the application in AR/VR due to their small size and high resolution. [1][2][3][4] There are several types of microdisplays; Liquid Crystal on silicon (LCoS) [5,6], Digital Light Processing (DLP) [7,8], OLED microdisplay [9][10][11][12][13], and LED microdisplay [14]. In general, LCoS and DLP have been already used in projectors, projection televisions, and near-eye applications such as electronic viewfinders for digital cameras.…”

Recent progress of organic light-emitting diode microdisplays for augmented reality/virtual reality applications

“…Microdisplays have received much attention as main display engines of augmented reality/virtual reality (AR/VR) devices due to their small size and high resolution [1][2][3][4]. There are many types of microdisplays such as liquid crystal display (LCD)-based microdisplays that use high-temperature polysilicon (HTPS) technology [5], liquid crystal on silicon (LCoS) [4,6], digital micromirror device (DMD) [6,7], organic light-emitting diode (OLED)-based microdisplays including OLED on silicon (OLEDoS) [8][9][10][11][12][13][14][15][16], quantum dot-based microdisplays [17], and microLED-based microdisplays [18,19]. LCoS and DMD have already been used in various applications such as projectors, projection TVs, night vision for military use, and AR/VR glasses.…”