Stereoscopic display apparatus and display method

A stereoscopic display apparatus having an input end for receiving position information of viewer, comprising:

• a display panel, wherein the display has an updated region and a non-updated region during a frame period the display panel displays according a first synchro-signal, and two single-eye images are displayed by the updated region and the non-updated region respectively;
• a dynamic-backlight module having a plurality of light-emitting regions, wherein the light-emitting regions are turned-on according to a second synchro-signal, the first synchro-signal and the second synchro-signal are synchronal, and during the frame period, parts of the light-emitting regions corresponding to the updated region are synchronally turned-on and parts of the light-emitting regions corresponding to the non-updated region are synchronally turned-off;
• a tracking panel disposed between the display panel and the dynamic-backlight module, wherein the tracking panel has a plurality of silt sets;
• and
• wherein at least one of the slit sets of the tracking panel is turned-on according to position information of viewer and the second synchro-signal, and light provided by at least parts of the turned-on light-emitting regions passes through one of the silt sets and the display panel such that one of the single-eye images is only displayed by the non-updated region.