30‐5: Late‐News Paper: Glass‐based High brightness AMLED using Dual Gate Coplanar a‐IGZO TFT

Abstract

In this study, we report the high-brightness 1.53 inch 130 PPI active-matrix light-emitting diode display (AMLED). Dual gate coplanar amorphous indium-gallium-zinc-oxide (a-IGZO) thin film transistor (TFT) is applied for the high brightness micro LED display. The micro LEDs optimized for the a-IGZO TFT backplane are fabricated, and the low-temperature eutectic bonding is applied to prevent thermal bonding damage. Finally, the glass based AMLED over ~ 10,000 cd/m² is demonstrated, using the dual gate coplanar a-IGZO TFT.

61‐1: Heuristics of OLED and Micro LED Efficiencies

“…The dotted line (Micro LEDs) shown in Figure 5 assumes that the efficiency drops by two times from large LEDs (solid black line), which is based on earlier reports [28,32]. However, recent results [33][34][35] indicate that the efficiency drop from large LEDs to 5µm LEDs is smaller than initial reports. The normalized EQE versus size collected from various recent publications is shown in Figure 6.…”

“…Next generation OLED displays demand high energy efficiency [2][3][4][5][6][7][8][9][10], but it is a hard challenge for the OLED displays to meet the needs for high efficiency, color accuracy, and long lifetime simultaneously [2,[11][12][13][14][15]. Therefore, inorganic LED (ILED or µLED) display technology is under research and development by several companies worldwide [16][17][18][19][20][21][22][23][24][25][26][27][28].…”

“…Figure 6. Normalized experimental EQE versus micro LEDchip size[28,[32][33][34][35]. Recent results show much better efficiencies for blue and green colors made of GaN.…”

56‐4: Design of a Transparent Dielectric Metamirror for Micro LED Displays

“…Recently, µLED displays have received much attention [1][2][3][4][5][6][7][8][9]. However, significant challenges have been recognized in the way of making such displays feasible and viable.…”

54‐4: A 142‐in. IGZO‐TFT Glass‐Substrate AM MiniLED Tiled Display with External Compensation and Multilayer Demura Algorithm

“…At present, all of the mass-produced LED display products on the market are the printed circuit boards (PCB) type. However, the production cost of the small-pitch PCB-LED display is expensive, and the process accuracy is approaching the limit as the pixel pitch decreases [4]. Therefore, it is very necessary to develop LED display screens with glass substrates, which can realize LED displays with smaller pitches, and is expected to greatly reduce costs of production.…”