70.4L: Late‐News Paper: 0.5‐inch XGA Micro‐OLED Display on a Silicon Backplane with High‐Definition Technologies

Abstract

We have developed a high-definition (0.5-inch

Novel 4T1C pixel circuit for high image quality OLEDoS microdisplays

“…The device parameters are shown in Table . The maximum emission current is designed to be approximately 3 nA, which corresponds to the maximum luminance of 1,200 cd/m 2 for a top‐emitting OLED (TEOLED) …”

New pixel driving circuit using self‐discharging compensation method for high‐resolution OLED micro displays on a silicon backplane

“…Figure shows a block diagram of the driving circuit and the system configuration of a 0.5‐in Quad‐VGA panel. Various driving circuits required for the M‐OLED have been built into the Si backplane . Our conventional products required the V scan drivers on the both sides of the pixel region because its pixel driving method needs to drive not only gate lines, but also VDD and VSS for each row.…”

“…Various driving circuits required for the M-OLED have been built into the Si backplane. 2 Our conventional products required the V scan drivers on the both sides of the pixel region because its pixel driving method needs to drive not only gate lines, but also VDD and VSS for each row. In contrast, the proposed pixel driving method results in simple pixel driving waveforms and allows us to reduce the V scan driver from the both sides to one side.…”

P‐53: A Novel Pixel Circuit Providing Expanded Input Voltage Range for OLEDoS Microdisplays

“…High resolution and low power consumption are required by the microdisplay applications. Given the size and resolution constrains, every OLEDoS sub-pixel is limited to area of tens of μm 2 [8], [15][16][17][18]. The luminance is proportional to OLED current density [13].…”

“…However, the shortcomings including its poor control on the low driving current and its sensitivity to the process deviation. To overcome these problems, several pixel circuit designs have been proposed [8][9][10], [16][17][18]. Among them, some failed to compensate the threshold voltage deviation of the driving transistor, and also their data voltage ranges were small [8][9][10], which resulted in poor control on the emission current.…”