Electronic apparatus and display control method

Abstract

According to an aspect of the present invention, there is provided an electronic apparatus including: a detection unit configured to detect a start of a reproducing of a motion picture to be displayed on a display unit; a change unit configured to change a refresh rate of the display unit when the start of the reproducing of the motion picture is detected, the refresh rate being changed not by changing an operating frequency of the display unit, the refresh rate being changed by changing a blanking period, the blanking period being a period during which a drawing operation of a screen on the display unit is not performed; and a control unit configured to control the display unit to display the motion picture based on the changed refresh rate.

1 . An electronic apparatus comprising:
 a display;   a display controller configured to control the display; and   a refresh rate controller configured to seamlessly change a refresh rate of the display from a first frequency to a second frequency lower than the first frequency by increasing a horizontal blanking period in such a manner that a first ratio of a sum of the horizontal blanking period and a horizontal active period before the change of the refresh rate to the sum after the change of the refresh rate corresponds to a second ratio of the second frequency to the first frequency, the horizontal blanking period being a period from an end of a drawing operation of a horizontal line on the display until a beginning of the drawing operation of the next horizontal line, the horizontal active period being a period of the drawing operation of the horizontal line; and   wherein the display controller is configured to control the display based on the refresh rate.   
     
     
         2 . The apparatus of  claim 1 , wherein the refresh rate controller is not configured to change an operation frequency in controlling the display. 
     
     
         3 . The apparatus of  claim 1 , wherein the refresh rate controller is configured to increase the horizontal blanking period thereby causing the first ratio a product of the second ratio and a first number. 
     
     
         4 . An electronic apparatus comprising:
 a display;   a display controller configured to control the display; and   a refresh rate controller configured to seamlessly change a refresh rate of the display from a first frequency to a second frequency higher than the first frequency by decreasing a horizontal blanking period in such a manner that a first ratio of a sum of the horizontal blanking period and a horizontal active period before the change of the refresh rate to the sum after the change of the refresh rate corresponds to a ratio of the second frequency to the first frequency, the horizontal blanking period being a period from an end of a drawing operation of a horizontal line on the display until a beginning of the drawing operation of the next horizontal line, the horizontal active period being a period of the drawing operation of the horizontal line; and   wherein the display controller is configured to control the display based on the refresh rate.   
     
     
         5 . The apparatus of  claim 4 , wherein the refresh rate controller is not configured to change an operation frequency in controlling the display. 
     
     
         6 . A display control method comprising:
 seamlessly changing a refresh rate of a display from a first frequency to a second frequency lower than the first frequency by increasing a horizontal blanking period in such a manner that a ratio of a sum of the horizontal blanking period and a horizontal active period before the change of the refresh rate to the sum after the change of the refresh rate corresponds to a ratio of the second frequency to the first frequency, the horizontal blanking period being a period from an end of a drawing operation of a horizontal line on the display until a beginning of the drawing operation of the next horizontal line, the horizontal active period being a period of the drawing operation of the horizontal line; and   controlling the display based on the refresh rate.