Abstract
The development of a large stereoscopic full-color LED display using a parallax barrier is described. An optimization of a viewing area that depends on the width of black regions between LEDs has been discussed and then its widening has been examined by using LED panels with different width of black regions. A method to enlarge the viewing areas of the display for observers with different interpupillary distances is proposed. Furthermore, elimination of the pseudoscopic viewing area by introducing black columns into the display has been discussed and confirmed by experiments.