A New Pixel Circuit Compensating for Strain-Induced Luminance Reduction in Stretchable Active-Matrix Organic Light Emitting Diode Displays

P‐7: Student Poster: AMOLED Pixel Circuit for Strain Compensation in Stretchable Display

“…According to (1), when the pixel area increases to (1 + 𝜖)𝐴, the OLED current should increase to (1 + 𝜖)𝐼 𝑂𝐿𝐸𝐷 to maintain the luminance same as before display stretching. In our previous paper, we have verified that using the property of the capacitive-type strain sensor, the OLED current can be increased to (1 + 𝜖)𝐼 𝑂𝐿𝐸𝐷 when the strain 𝜖 is applied [8]. Thus, we can conclude that the pixel circuit can effectively compensate for the luminance reduction caused by display deformation.…”

“…When the strain 𝜖 is applied to the display, each pixel area increases to (1 + 𝜖)𝐴, which eventually decreases the luminance of the display as 𝐿/(1 + 𝜖). In our previous work, we proposed the pixel circuit for stretchable AMOLED display that can improve the image quality with 6 TFTs including a double-gate structure TFT as a driving TFT, 2 storage capacitors and 1 capacitive-type strain sensor [8]. In this paper, we propose a new pixel circuit for the stretchable AMOLED display using 1 capacitive-type strain sensor, 2 storage capacitors, and 5 TFTs with a single-gate driving TFT, which is easier to be fabricated than double-gate structure.…”

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.…”

P‐26: Student Poster: AMOLED Pixel Circuit Compensating for Stretching and I‐R Drop

“…In a stretchable AMOLED display, the luminance of the display decreases when the panel area is expanded by stretching and the compensation for the stretching is required. [6][7] In this study, we proposed a stretching compensation pixel circuit that can respond to the negative Vth shift of a-IGZO TFT and compensates for decreased luminance due to increased display area and I-R Drop.…”