Zigzag Display Fan-Out Wiring for Uniform Luminance and Reduced Dead Space

The fan-out wires are designed with different widths at different locations: wider in the first direction (to reduce resistance for longer paths) and narrower in the second direction. This local variation in wire width compensates for resistance differences across the display panel, achieving uniform luminance without excessive complexity.

Instead of uniformly increasing wire width across all fan-out wires, the patent applies width variation locally: wires are wider only where needed (in the first direction) to compensate for resistance, and maintain standard width elsewhere. This targeted approach reduces dead space while achieving luminance uniformity.

The photomask is designed with pre-compensated features: wider patterns for fan-out wires in the first direction and included angles greater than 90 degrees at wire intersections. These preliminary design adjustments ensure that after manufacturing tolerances are applied, the final wire dimensions and spacing remain adequate, preventing open-circuits and short-circuits while maintaining fine pitch.

The patent varies the spacing between fan-out wires locally based on position: wires are spaced more widely where resistance compensation is needed (with wider wire widths) and can be placed closer together where standard dimensions suffice. This selective spacing reduces overall dead space while maintaining adequate isolation to prevent short-circuits.