Stabilizing image quality in AMOLED displays across temperature variations via subpixel-level design optimization
Source abstract
Abstract
Temperature variations in active-matrix organic light-emitting diode (AMOLED) displays cause noticeable changes in luminance and color, leading to degradation in overall image quality. To address this issue, this study proposes a design optimization method that locally modulates the contact-hole density around the driving thin-film transistor (TFT) within each subpixel to effectively reduce temperature-induced variations. A contact-hole refers to an opening in the interlayer dielectric that provides a vertical electrical connection between stacked metal layers. Its density was controlled to adjust the degree of low-temperature polycrystalline silicon (LTPS) dehydrogenation during annealing, thereby tuning the temperature-dependent threshold-voltage (V th ) variation. The proposed method was applied to the subpixel design of a 13-inch AMOLED panel with a tandem OLED to verify its effectiveness in controlling temperature-induced luminance variation. As a result, the color deviation was reduced by 73% at (40 °C) and by 42% at (10 °C) compared with the conventional design. This improvement originated from the enhanced luminance balance among the red, green, and blue subpixels achieved by stabilizing the temperature-dependent luminance variation.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Thin-Film Transistor Technologies · Organic Light-Emitting Diodes Research · CCD and CMOS Imaging Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (42)
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