A display device that requires less manufacturing time is presented. The display device includes a light blocking member formed on a substrate, a semiconductor layer formed on the light blocking member, and a gate insulating layer formed on the semiconductor layer. Gate conductors, a first interlayer insulating layer, data conductors, a second interlayer insulating layer, and a pixel electrode are formed. A third interlayer insulating layer is deposited with an opening that extends to the pixel electrode. An organic light emitting member is formed in the opening, and a common electrode is formed. The light blocking member contains nickel and silicon oxide. The presence of nickel-and-silicon-oxide light blocking member below the semiconductor improves the crystallizing speed for the semiconductor layer, reducing the overall manufacturing time. Further, the light blocking member is disposed under the pixel electrodes to prevent light leakage, improving the contrast ratio and image quality.