Abstract: A DC-DC converter (600) generates a supply voltage VPW1, etc. for supplying to a drive circuit (500), by converting a voltage level through an operation of a switching element which changes an electric current passing through an inductor. A mode control signal Cm is generated in a power supply control section (220) of the display control circuit (200), and is supplied to the DC-DC converter (600), whereby the DC-DC converter (600) is operated in a PFM control mode during a period when a load condition is light such as during a non-refreshing period in an intermittent driving, whereas the mode is changed to a PWM control mode in the other periods.

Abstract: An object of the present invention is to provide a display device which includes a power supply circuit capable of supplying a current necessary for driving a large or high-definition display panel for example, and also is suitable in low power consumption configurations implemented by intermittent driving for example. A DC-DC converter (600) generates a supply voltage VPW1, etc. for supplying to a drive circuit (500), by converting a voltage level through an operation of a switching element which changes an electric current passing through an inductor. A mode control signal Cm is generated in a power supply control section (220) of the display control circuit (200), and is supplied to the DC-DC converter (600), whereby the DC-DC converter (600) is operated in a PFM control mode during a period when a load condition is light such as during a non-refreshing period in an intermittent driving, whereas the mode is changed to a PWM control mode in the other periods.

Abstract: A black line inserting section (3) inserts first grayscale inserts first grayscale lines, each of which has a color of certain grayscale and has a width corresponding to a certain number of pixels, into each of first video images such that a certain distance is secured, between the respective first grayscale lines, in a vertical or horizontal direction of each of the first video images. The black line inserting section (3) also inserts second grayscale lines into each of second video images, which corresponds to a certain number of frames and by which a corresponding one of the first video images is followed, such that the second grayscale lines are not inserted into second parts corresponding to first parts where the respective first grayscale lines are inserted.