VIDEO DISPLAY DEVICE
FIG5 is a timing chart illustrating a flow until a video signal is displayed
FIG5 shows a state until the video signal is displayed based on the frame sequential signal FSS. S1 indicates the frame sequential signal FSS obtained by synthesizing the video signal for the visible light image VIS and the video signal for the infrared light image IRS with each other. In videos displayed by the simulator system that assumes the night flight, since the visible light image becomes dark, a light intensity of the visible light is low. Meanwhile, it is necessary to increase the intensity of the infrared light when the infrared light image is displayed. Therefore, it is expected that the gradation of the video signal for the visible light image VIS is low, and that the gradation of the video signal for the infrared light image IRS is high.
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subframe data.
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PBS
['1. A video display device (100) comprising: a display element (6); a visible light source (1) configured to irradiate visible illumination light; an infrared light source (2) configured to irradiate infrared illumination light; a subframe data generator (12) configured to generate subframe data based on 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 subframe data indicating on and off of an applied voltage to the display element (6) in the frames; a pixel circuit (13) configured to drive the display element (6) based on the subframe data generated by the subframe data generator (12); and a light source controller (14) configured to control on and off of the visible light source (1), wherein, when gradation of the mixed video signal is equal to or less than a predetermined gradation, the subframe data generator (12) generates the subframe data so that an applied voltage to the display element (6) is turned off during a first predetermined period from a start of the frame of the video signal for a visible light image or the video signal for an infrared light image, and wherein the light source controller (14) turns on the visible light source (1) after a lapse of a second predetermined period from a start of the frame of the video signal for a visible light image, and turns off the visible light source (1) at a  timing when the frame of the video signal for a visible light image is ended.']