9.1: WITHDRAWN: 9.2: New Threshold Voltage Compensation Pixel Circuits in 13.5‐inch Quad Full High Definition OLED Display of Crystalline In‐Ga‐Zn‐Oxide FETs

Abstract

We devised a 5Tr+1C threshold voltage compensation pixel circuit that operates even with a normally-on transistor. Variations in threshold voltage can be reduced to 25 to 30%. We fabricated a 13.5-inch quad full high definition (QFHD) OLED display, which has a top-emission structure using white tandem OLEDs with color filters.

An Accurate and Fast Current-Biased Voltage-Programmed AMOLED Pixel Circuit With OLED Biased in AC Mode

“…In the conventional VP circuits with the so-called "diode-connected" V TH sensing scheme, the compensation is limited when the V TH is a negative value [25], [26]. However, the compensation can still work well in the proposed CBVP circuit as it is current sensed.…”

Correlation of thermal annealing effect, crystallinity and electrical characteristics in c-axis crystallized InGaZnO thin-film transistors

“…1), the I off is further improved by an order of magnitude from $1 Â 10 À13 A/lm to 2.5 Â 10 À14 A/lm. It is suggested that off-state current may be related to c-axis aligned crystallization, which have been reported [13]. From C-V (dielectric constant of Al 2 O 3 $7.6) and I-V curves of Al 2 O 3 MIM capacitor (see inset of Fig.…”

“…Recently, a c-axisaligned IGZO channel has been implemented in thin film transistor (TFT) process. The c-axis-aligned IGZO TFT featured a low off-state current and large on-off ratio [13] that showed the potential for developing new applications including active matrix liquid crystal display (AMLCD) or active matrix organic light emitted diode (AMOLED).…”

Low turn-on voltage due to conduction band lowering effect in crystalline indium gallium zinc oxide transistors

“…11,12) The CAAC-IGZO transistors with such properties have been applied to a liquid crystal display with high definition and an organic electroluminescence (EL) display. [13][14][15][16][17] In addition to the display application, the CAAC-IGZO has found application to low power consumption LSIs such as a nonvolatile memory, [18][19][20][21][22] a normally-off central processing unit (CPU), 23,24) a field-programmable gate array (FPGA), 25) and an image sensor, 26,27) has been proposed.…”