Touch Sensing Unit Bezel Width Reduction

The patent transitions from planar wiring arrangements to three-dimensional vertical wiring structures that extend through multiple layers (first through fourth conductive layers). This vertical dimensionality allows signal transmission without occupying horizontal space in the non-display area, thereby maintaining a narrow bezel while supporting touch sensing functionality.

The patent implements nested conductive structures where multiple conductive layers are stacked vertically within the same horizontal footprint. The first, second, third, and fourth conductive layers are positioned at different vertical levels, allowing multiple wiring functions to be nested within the same spatial region without increasing the bezel width.

The patent creates multi-functional conductive structures where the same vertical wiring architecture serves multiple purposes: transmitting drive signals to display elements, carrying sensing signals from touch electrodes, and providing signal routing through the non-display area. This eliminates the need for separate dedicated sensing signal lines that would increase bezel width.

The patent employs dynamic signal routing where the same physical conductive structure can transmit different types of signals (drive signals and sensing signals) at different times or through different pathways. The shift register circuit dynamically selects which conductive elements are active for sensing versus display operations.