1. A display apparatus comprising: a display section; and a light-beam control section configured to control a light beam coming from said display section or a light beam propagating to said display section; said display apparatus having a first display mode for displaying a plurality of observing-point images on said display section wherein said observing-point images include two or more first observing-point images, and one or a plurality of second observing-point images, and the number of pixels included in each of said second observing-point images is smaller than the number of pixels included in each of said first observing-point images.