Abstract: A protector device includes a main body; a back adhesive layer disposed on a lower side of the main body for adhesively mounted on a mobile device; an anti-scratch layer disposed on an upper side of the main body; and one micro structure pattern layer disposed between the anti-scratch layer and the upper side of the main body or between the back adhesive layer and the lower side of the main body, wherein, when the backlight reflection of the mobile device is lower than the environmental light, micro structure on the micro structure pattern layer reflects and displays a reflected pattern over a display region of the mobile device and when the backlight reflection of the mobile device is greater than the environmental light, the micro structure pattern layer turns to be transparent so that operation and viewing of the mobile device is not obstructed.