Projection type video display unit and illuminating device

A projection type video display comprising:

• light deflecting means for circularly deflecting, in receiving irradiated light and transmitting the received light, the light;
• color separating means for separating the light into lights in the three primary colors and respectively introducing the lights into three hold type display elements;
• projecting means for recombining image lights in the respective colors obtained through the hold type display elements and projecting the recombined image lights;
• and
• element driving means for feeding a pixel-driving signal to each of the hold type display elements, and in that
• the amount of light which will be wasted in producing said circular deflection is reduced by utilizing at least one of the functions including condensing, more than twice reflecting, and refracting, and in that the lights in the respective colors condensed in smaller areas than those of the element are circularly scrolled on the hold type display elements.