A touch display apparatus not subject to a visible moiré pattern includes a touch display panel and a brightness enhancement film (BEF). The touch display panel includes a substrate and a color filter layer. The color filter layer on the substrate facing the BEF includes color filters spaced from each other. The BEF includes auxiliary structures parallel with each other along a second direction. The auxiliary structures extend from the BEF toward the color filter layer. A number of the auxiliary structures per unit area is less than a number of the color filters per unit area. Auxiliary structures otherwise visible to eyes of user are completely covered by the color filters based on a refraction of light passing through the substrate, preventing interference leading to the moiré phenomenon.