Distribution Density-Aware Compensation for High-Resolution Stretchable Display

Abstract

When a stretchable display is stretched, the area of the exposed substrate between the lightemitting diodes (LEDs) increases, decreasing the image luminance. Currently, this problem is not addressed in existing high-resolution display systems. Although the mean-based method and gamma correction method using general image processing techniques, which are first presented in this paper, can compensate for the decrease in luminance, these methods cannot be adaptively applied for stretchable display systems. Therefore, this paper proposes a novel image compensation method optimized for stretchable displays. The proposed distribution density-aware method (DDAM) compensates for the decrease in luminance particularly for the area involving the newly exposed substrate. The DDAM solves the saturation problem associated with the mean-based method and the problem of inaccurate luminance estimation associated with the gamma correction method. Compared with the mean-based method and the gamma correction method, the peak signal-to-noise ratio of the DDAM is 0.600 dB and 1.977 dB higher, respectively. The structural similarity index measure is also 0.055 and 0.057 higher, respectively. In addition, we develop a novel simulator to evaluate the stretching of high-pixel-per-inch displays, which are being actively researched, and use it to verify the performance of above mentioned luminance reduction compensation methods.

Strain-Sensor-In-Pixel Technology for Resolution-Sustainable Stretchable Displays

“…This dynamic modulability of responsivity is a key advantage of the TFT-based approach, enabling applications such as smart strain sensors for robotic wrists, which allow for varied movements, and display monitoring sensors that detect V G variation in driving TFTs or the deterioration in LED efficiency. 23,72 To determine the mechanism of the resistance changes in the interconnect between the gate and source electrodes on the transfer characteristics of the TFTs, the proposed circuit was analyzed using the SmartSpice Circuit Simulator tool from Silvaco. The schematic illustration of the proposed circuit is shown in Figure S11a.…”

“…Additionally, this design is distinguished by the tunability of the sensor’s responsivity through V G variation, unlike the two-terminal design where resistance and responsivity are fixed after fabrication. This dynamic modulability of responsivity is a key advantage of the TFT-based approach, enabling applications such as smart strain sensors for robotic wrists, which allow for varied movements, and display monitoring sensors that detect V G variation in driving TFTs or the deterioration in LED efficiency. , …”