A projection engine uses a first polarizing beam splitter that substantially reflects light incident along a first input direction in a first polarization state and substantially transmits light incident in the first input direction in a second polarization state orthogonal to the first polarization state. The titanium nitride material may be oxidized to a titanium dioxide material. The first electrode is formed in a surface of a second-conductivity-type collector layer opposite to a first-conductivity-type first semiconductor layer in the region. Depending on the result of the quantization, the control block toggles the driver of one of the capacitors corresponding to the most significant bit.