A head mounted display may include a single liquid crystal display element. In some embodiments, the luminance value can be computed for distinct combinations of color component values corresponding to a plurality of color components in a first color space. The package substrate is provided with a first common GND wire for supplying a GND potential to each of the LNAs, with a second common GND wire for supplying the GND potential to the RF VCO, and with a third common GND wire for supplying the GND potential to the IF VCO. Hermetically sealed feedthroughs formed of conductive material running through channels in the wafers provide electrical connections to components inside the sealed cavities.