3D display device and method

According to one embodiment, a stereoscopic display device (1) characterized by comprising an image signal output modules (41) configured to output a first image signal for a first image and a second image signal for a second image alternately, the second image which is to be viewed alternately with the first image, a display (26) configured to display the first image and second image corresponding to the first image signal and the second image signal output from the image signal output module, a lighting module (28) configured to light the first image and second image displayed by the display, a driving module (29) configured to control a lighting timing of the first image and second image by the lighting module, and a shutter controller (44) configured to control a timing of opening a first shutter which makes the first image viewable and a second shutter which makes the second image viewable alternately, according to a timing of the alternate output of the first image signal and the second image signal by the image signal output module, while providing a period of closing both of the first shutter and the second shutter.