High resolution autostereoscopic display apparatus with interlaced image

An autostereoscopic display apparatus comprising:

• a backlight unit;
• a polarizing plate disposed in front of the backlight unit;
• a display panel which displays a left eye image and a right eye image by interlacing pixel lines of the left and right eye images alternately and sequentially;
• a lenticular lens sheet, disposed between the polarizing plate and the display panel, which separates light emitted from the backlight unit into a left eye viewing zone and a right eye viewing zone;
• and
• a polarization switch which controls a polarization direction of light proceeding towards the left eye viewing zone so that light is incident on pixel lines of the display panel displaying the left eye image and controls a polarization direction of light proceeding towards the right eye viewing zone so that light is incident on pixel lines of the display panel displaying the right eye image, in synchronization with a vertical scanning time of the display panel,
• wherein the polarization switch comprises:
• a spatial light modulator, disposed between the polarizing plate and the lens sheet, comprising a plurality of first vertical columns and second vertical columns that change the polarization direction of incident light, are independently controlled and alternately provided;
• and
• a birefringent element array, disposed between the lenticular lens sheet and the display panel, comprising a plurality of first and second horizontal birefringent elements, alternating in the vertical direction, which change the polarization direction of incident light such that a polarization direction of light passing through the first birefringent elements is perpendicular to a polarization direction of light passing through the second birefringent elements.