A liquid crystal display panel is provided. The LCD panel includes a first substrate, a second substrate parallel to the first substrate, and a liquid crystal layer disposed therebetween. The first substrate, having a plurality of sub-pixels, includes a first base, an array of switch units, a dielectric layer, and a reflective electrode. The switch units are disposed on the first substrate wherein a first switch unit of the array of switch units is located at one of the sub-pixels. The dielectric layer, formed on the array of switch units, has at least one contact. The dielectric layer has a rough structure with concave portions and convex portions. The convex portion has a height t, and a width d, as well as the side wall of the convex portion have a slant angle θ, wherein the width d, is not less than 2*t*cotθ. The reflective electrode is disposed on the dielectric layer and electrically connected to the first switch unit through the contact.