Patent ID: 8760442

Claim:
A display device comprising: a display portion comprising pixels, each of the pixels comprising a transistor; and a display controller configured to control the display portion such that the display portion performs display by switching a first still image display period and a second still image display period, wherein the first still image display period comprises a first frame period and a second frame period, wherein the first frame period comprises a writing period in which a first image signal is written to first to n-th rows of the pixels and a holding period in which the first image signal is held, wherein the second frame period comprises a writing period in which a second image signal is written and a holding period in which the second image signal is held, wherein the second still image display period comprises a third frame period, wherein the third frame period comprises a writing period in which a third image signal is written to the first to n-th rows of the pixels and a holding period in which the third image signal is held, wherein the second frame period follows the first frame period, wherein the third frame period follows the second frame period, wherein the first image signal and the second image signal are the same, wherein the third image signal and the second image signal are different, and wherein the display controller is configured to control the display portion such that a length of the writing period of the third frame period is longer than a length of the writing period of each of the first frame period and the second frame period.