Display control device

A display control device for displaying an image on a display unit, comprising:

• an image creating unit creating a bright image and a dark image included in the image;
• a display output unit (i) displaying the image created by the image creating unit on the display unit and (ii) outputting an image update notification when the display output unit updates the image displayed on the display unit;
• an update time measuring unit measuring a time difference between a time at which the update time measuring unit acquires a last image update notification and a time at which the update time measuring unit acquires a second-to-last image update notification, as an update time that is a time from when the image displayed on the display unit is updated until the image is updated next time;
• and
• a blinking control unit executing a blinking control in which the bright image and the dark image are alternately output to the display unit, wherein
• the blinking control unit determines a bright time during which the bright image is displayed on the display unit and a dark time during which the dark image is displayed on the display unit to be integral multiples of the update time measured by the update time measuring unit in such a manner that a blinking frequency determined from a sum of the bright time and the dark time falls within a tolerance frequency range determined based on a predetermined target blinking frequency, and
• when the blinking control unit executes the blinking control, the blinking control unit executes an on-display control to instruct the image creating unit to create the bright image for a number of times of a value obtained by dividing the bright time by the update time, and then executes an off-display control to instruct the image creating unit to create the dark image for a number of times of a value obtained by dividing the dark time by the update time, and repeats the on-display control and the off-display control until the blinking control ends.