What is each square in the matrix of a thin-film transistor referred to as?

In the context of thin-film transistors (TFTs), each square in the matrix is referred to as a "detector element" (del). This terminology is used because each individual square or pixel in a display matrix, such as those found in flat-panel displays or certain types of imaging sensors, performs the role of detecting and processing the light or electrical signals that correspond to the image information.

A detector element is essentially the smallest unit of the display or sensor that can be individually controlled and manipulated, allowing for the formation of an entire image or data output when combined with other elements in the matrix. This is critical in applications such as digital imaging and display technology, where precise control of each pixel is needed to achieve high resolution and image quality.

The other terms, while related to computing and digital contexts, do not specifically describe the function of individual units within a matrix of a thin-film transistor. A bit refers to the smallest unit of data in computing, a byte is typically a group of eight bits, and a line pair usually pertains to optical resolution rather than individual elements within a display matrix.