TFT-type Strain Sensors for Implementing Hidden Pixel Structure in Active-Matrix Stretchable Displays

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

“…This activation is performed to maintain the initial pixel density. As illustrated in Figure , the empty space between the normal pixels is occupied by the activated hidden pixels, thus preventing the loss of resolution and luminance during stretching . Such an idea was conceptually demonstrated in a simple passive-matrix (PM) LED pixel array, where the activation of hidden pixels was controlled by integrating additional strain sensors outside the array. ,, These sensors, which are typically designed with a positive gauge factor (P-GF) that increases resistance upon stretching, inevitably require complex signal processing to facilitate current flow and trigger the activation of the hidden pixels by the elongation of the substrates. − For further advancement, key technologies compatible with pixel circuits arranged with numerous TFTs are essentially required to enable the application of this design concept to commercially available active-matrix (AM) displays …”