Abstract: A salt molten at room temperature that does not contain any organic solvent, excelling in stability; and a display device that is improved in the durability in high-temperature environment by virtue of the use thereof. There is provided a salt molten at room temperature characterized by being composed of a silver salt and any of compounds of the following general formula (I) or general formula (II).

Abstract: The present invention provides an image projection system comprising a spatial light modulator (SLM) comprises a plurality of pixel elements, wherein each of the pixel elements further comprises a deflectable mirror, and at least a first electrode and a second electrode for controlling the deflectable mirror to deflect to different tilt angles to reflect and modulate an illumination light for displaying an image; and a controller for applying a voltage to the second electrode wherein the voltage applied in an initial operation period is different from the voltage applied in an image display period.