Liquid crystal on silicon display with brightness adjustment

A liquid crystal on silicon display, comprising:

• a polarization beam splitter, having a first side and a second side disposed opposite to the first side;
• a light source, disposed at the first side of the polarization beam splitter;
• a liquid crystal on silicon panel, disposed at a third side of the polarization beam splitter;
• and
• a gain control circuit, coupled to the liquid crystal on silicon panel and receiving a plurality of brightness values, wherein each of the brightness values has a coordinate which is based on a coordinate axis extending from the first side of the polarization beam splitter to the second side of the polarization beam splitter, the brightness values comprise a first brightness value and a second brightness value, the first brightness value and the second brightness value belong to a same color, the coordinate of the first brightness value is less than the coordinate of the second brightness value,
• wherein the gain control circuit determines a plurality of gains according to the coordinates, and adjusting the brightness values according to the gains, wherein the gain of the first brightness value is less than the gain of the second brightness value,
• wherein after adjusting the brightness values, the gain control circuit transmits the brightness values to the liquid crystal on silicon panel.