A video display device comprising: a display element; a visible light source configured to irradiate the display element with visible illumination light; an infrared light source configured to irradiate the display element with infrared illumination light; characterized in that the video display device further comprises: a subframe data generator configured to generate subframe data based on a drive gradation table and a mixed video signal in which a frame of a video signal for a visible light image and a frame of a video signal for an infrared light image are alternately repeated, the drive gradation table setting on or off in a plurality of subframes for each of a plurality of gradations, and the subframe data indicating on or off of an applied voltage to the display element in each subframe; a signal processor configured to generate a light source control signal synchronized with the frame of the video signal for a visible light image and the frame of the video signal for an infrared light image of the mixed video signal; a pixel circuit configured to drive the display element based on the subframe data generated by the subframe data generator; and a light source controller configured to control on and off of the visible light source based on the light source control signal, wherein, the subframe data generator comprises a means adapted to generate the subframe data so that an applied voltage to the display element is turned off during a first predetermined period from a start of the frame of the video signal for a visible light image when a gradation of the video signal for a visible light image is equal to or less than a predetermined gradation, and during the first predetermined period from a start of the frame of the video signal for an infrared light image when the video signal for an infrared light image is equal to or less than the predetermined gradation, and wherein the light source controller comprises a means adapted to turn on the visible light source after a lapse of a second predetermined period from the start of the frame of the video signal for a visible light image, and to turn off the visible light source at a timing when the frame of the video signal for a visible light image is ended, based on the light source control signal. a display element; a visible light source configured to irradiate the display element with visible illumination light; an infrared light source configured to irradiate the display element with infrared illumination light; characterized in that the video display device further comprises: a subframe data generator configured to generate subframe data based on a drive gradation table and a mixed video signal in which a frame of a video signal for a visible light image and a frame of a video signal for an infrared light image are alternately repeated, the drive gradation table setting on or off in a plurality of subframes for each of a plurality of gradations, and the subframe data indicating on or off of an applied voltage to the display element in each subframe; a signal processor configured to generate a light source control signal synchronized with the frame of the video signal for a visible light image and the frame of the video signal for an infrared light image of the mixed video signal; a pixel circuit configured to drive the display element based on the subframe data generated by the subframe data generator; and a light source controller configured to control on and off of the visible light source based on the light source control signal, a subframe data generator configured to generate subframe data based on a drive gradation table and a mixed video signal in which a frame of a video signal for a visible light image and a frame of a video signal for an infrared light image are alternately repeated, the drive gradation table setting on or off in a plurality of subframes for each of a plurality of gradations, and the subframe data indicating on or off of an applied voltage to the display element in each subframe; a signal processor configured to generate a light source control signal synchronized with the frame of the video signal for a visible light image and the frame of the video signal for an infrared light image of the mixed video signal; a pixel circuit configured to drive the display element based on the subframe data generated by the subframe data generator; and a light source controller configured to control on and off of the visible light source based on the light source control signal, wherein, the subframe data generator comprises a means adapted to generate the subframe data so that an applied voltage to the display element is turned off during a first predetermined period from a start of the frame of the video signal for a visible light image when a gradation of the video signal for a visible light image is equal to or less than a predetermined gradation, and during the first predetermined period from a start of the frame of the video signal for an infrared light image when the video signal for an infrared light image is equal to or less than the predetermined gradation, and wherein the light source controller comprises a means adapted to turn on the visible light source after a lapse of a second predetermined period from the start of the frame of the video signal for a visible light image, and to turn off the visible light source at a timing when the frame of the video signal for a visible light image is ended, based on the light source control signal.