Method of measuring display delay time, display device, and method of manufacturing display

A method of measuring a display delay time from capturing an image to displaying the image, in which a first display includes a plurality of display elements, and the plurality of display elements are grouped in such a manner that the same group includes the display elements close to each other in a predetermined direction, and each group includes a first type display element and a second type display element,

• the method comprising:
• a first step in which a display pattern displayed on a first display is switched to a display pattern other than the display pattern at every elapse of a pattern continuation time of the display pattern, and at every elapse of the pattern continuation time, among i (i is a natural number greater than 2) first type display elements of the group, j (j is a natural number, and 1<j<i) first type display elements to be brought into a first display state is switched, and h (h is a natural number) second type display elements of the group display progress of the switching operation;
• a second step in which an image of the display pattern displayed on the first display is captured;
• a third step in which the captured image of the display pattern is displayed on a second display;
• and
• a fourth step in which the display delay time from capturing the image of the display pattern displayed on the first display to displaying the image of the display pattern on the second display is measured based on a difference between the display pattern displayed on the first display and the display pattern displayed on the second display.

A method of manufacturing a display comprising:

• a first step in which a display pattern displayed on a first display including i (i is a natural number greater than 2) display elements is switched to a display pattern other than the display pattern at every elapse of a pattern continuation time of the display pattern, and j (j is a natural number, and 1<j<i) display elements to be brought into a first display state among i display elements is switched at every elapse of the pattern continuation time of the display pattern;
• a second step in which an image of the display pattern displayed on the first display is captured;
• a third step in which the captured image of the display pattern is displayed on a second display;
• and
• a fourth step in which the display delay time from capturing the image of the display pattern displayed on the first display to displaying the image captured on the second display is measured.