A head-up display device configured to project information as at least one of an image or text on a windshield, the head-up display device comprising: a display panel; a backlight module configured to emit light to the display panel; an optical guide module configured to guide the information displayed on the display panel to the windshield; a communication module configured to receive data from a mobile terminal, characterized in that: the backlight module includes a first backlight unit, a second backlight unit and a third backlight unit which are configured to emit light to the display panel in different directions from one another such that parts of the information are independently projected on different regions of the windshield, wherein the first to third backlight units (211, 212, 213) are spaced apart from one another by a prescribed distance, wherein the head-up display device comprises: a controller configured to control at least one backlight unit (211, 212, 213) of the backlight module based on global positioning system, GPS, information, control at least one other backlight unit (211, 212, 213) based on the data received from the mobile terminal, and control the display panel to change the information displayed on the display panel in response to an operation of each of the backlight units (211, 212, 213), wherein the optical guide module comprises: a main mirror configured to reflect the information displayed on the display panel to the windshield; and sub mirrors (241, 242) including a first sub mirror which reflects light emitted from the first backlight unit toward the main mirror and a second sub mirror which reflects light emitted from the third backlight unit toward the main mirror, wherein the sub mirrors (241, 242) are configured to be tiltable, wherein first and third images which are displayed on the display panel when the first and third backlight units (211, 213) are operated are displayed on a region of the windshield according to an adjustment of tilts of the sub mirrors (241, 242). a display panel; a backlight module configured to emit light to the display panel; an optical guide module configured to guide the information displayed on the display panel to the windshield; a communication module configured to receive data from a mobile terminal, characterized in that: the backlight module includes a first backlight unit, a second backlight unit and a third backlight unit which are configured to emit light to the display panel in different directions from one another such that parts of the information are independently projected on different regions of the windshield, wherein the first to third backlight units (211, 212, 213) are spaced apart from one another by a prescribed distance, wherein the head-up display device comprises: a controller configured to control at least one backlight unit (211, 212, 213) of the backlight module based on global positioning system, GPS, information, control at least one other backlight unit (211, 212, 213) based on the data received from the mobile terminal, and control the display panel to change the information displayed on the display panel in response to an operation of each of the backlight units (211, 212, 213), wherein the optical guide module comprises: a main mirror configured to reflect the information displayed on the display panel to the windshield; and sub mirrors (241, 242) including a first sub mirror which reflects light emitted from the first backlight unit toward the main mirror and a second sub mirror which reflects light emitted from the third backlight unit toward the main mirror, wherein the sub mirrors (241, 242) are configured to be tiltable, wherein first and third images which are displayed on the display panel when the first and third backlight units (211, 213) are operated are displayed on a region of the windshield according to an adjustment of tilts of the sub mirrors (241, 242). a main mirror configured to reflect the information displayed on the display panel to the windshield; and sub mirrors (241, 242) including a first sub mirror which reflects light emitted from the first backlight unit toward the main mirror and a second sub mirror which reflects light emitted from the third backlight unit toward the main mirror, wherein the sub mirrors (241, 242) are configured to be tiltable, wherein first and third images which are displayed on the display panel when the first and third backlight units (211, 213) are operated are displayed on a region of the windshield according to an adjustment of tilts of the sub mirrors (241, 242).