Residual dc measurement device, residual dc measurement method, and residual dc measurement program

A residual direct current (DC) measurement method for measuring residual DC of a display device, the method comprising:

• causing the display device to display a flicker measurement image, acquiring a light reception signal that corresponds to an amount of received light and is output by a light receiver including a photoelectric conversion element by receiving light emitted from the display device while the flicker measurement image is displayed, measuring a flicker value of the display device on the basis of the acquired light reception signal, and storing the flicker value in a storage as an initial flicker value;
• causing the display device to display a predetermined display image instead of the flicker measurement image for a predetermined display time;
• causing the display device to display the flicker measurement image again instead of the predetermined display image when the predetermined display time elapses, acquiring the light reception signal output from the light receiver while the flicker measurement image is displayed, measuring the flicker value of the display device on the basis of the acquired light reception signal, and storing the flicker value in the storage as a posterior flicker value;
• and
• a flicker change amount by subtracting the initial flicker value from the posterior flicker value stored in the storage as an index value representing the residual DC.

A non-transitory recording medium storing a computer readable A residual direct current (DC) measurement program for causing a computer of a residual DC measurement device for measuring residual DC of a display device to execute:

• causing the display device to display a flicker measurement image, acquiring a light reception signal that corresponds to an amount of received light and is output by a light receiver including a photoelectric conversion element by receiving light emitted from the display device while the flicker measurement image is displayed, measuring a flicker value of the display device on the basis of the acquired light reception signal, and storing the flicker value in a storage as an initial flicker value;
• causing the display device to display a predetermined display image instead of the flicker measurement image for a predetermined display time;
• causing the display device to display the flicker measurement image again instead of the predetermined display image when the predetermined display time elapses, acquiring the light reception signal output from the light receiver while the flicker measurement image is displayed, measuring the flicker value of the display device on the basis of the acquired light reception signal, and storing the flicker value in the storage as a posterior flicker value;
• and
• calculating a flicker change amount by subtracting the initial flicker value from the posterior flicker value stored in the storage as an index value representing the residual DC.