Reflective LCD Substrate Surface Structure for Color Ring Reduction

The reflective layer incorporates bumps with asymmetric size distribution, where first bumps have a first size and second bumps have a second size different from the first size. This asymmetric structure disrupts the regular reflection patterns that cause color rings and viewing angle dependence, thereby improving picture uniformity while maintaining the reflective LCD's low power consumption advantage

The reflective layer features locally varied bump structures where different regions contain bumps of different sizes. This local variation in bump size creates position-dependent reflection characteristics that collectively improve overall diffuse reflectivity and eliminate uniform picture display issues across different viewing angles

By introducing asymmetric bump size variation into the reflective layer, the patent eliminates the symmetric periodic structure that causes color ring phenomena. The first bumps with first size and second bumps with second size create irregular reflection patterns that suppress color rings while remaining manufacturable through standard photolithography and etching processes

The patent changes the geometric parameter of bump size across different locations in the reflective layer. By varying the size parameter of bumps (first size vs. second size) rather than maintaining a uniform size, the reflective layer achieves improved optical performance without fundamentally changing the manufacturing process