Patent attributes
A head-mounted display device includes a housing, a pair of display modules, a pair of cameras, a driving module and a control system. The housing can cover eyeballs of the user. The cameras are respectively fixed to the display modules to capture images of the eyeballs. The driving module is coupled to the display module to move the display modules relative to the housing. The control system is electrically connected to the of cameras and the driving module. An adjustment method is applicable to the above-mentioned head-mounted display device. An image of the corresponding eyeball is captured by one of the cameras. The control system calculates a deviation between a center of a pupil of the corresponding eyeball and a center of the corresponding image according to the image. The control system controls the driving module to move the display modules relative to the housing according to the deviation.