Method for driving liquid crystal display device

A display device comprising:

• a first pixel comprising:
• a first transistor;
• a first liquid crystal element;
• and
• a first capacitor;
• a second pixel comprising:
• a second transistor;
• a second liquid crystal element;
• and
• a second capacitor;
• and
• a holding signal generation circuit,
• wherein each of the first transistor and the second transistor comprises an oxide semiconductor layer comprising a channel formation region,
• wherein one of a source and a drain of the first transistor is electrically connected to a pixel electrode of the first liquid crystal element,
• wherein a first electrode of the first capacitor is electrically connected to the pixel electrode of the first liquid crystal element,
• wherein a second electrode of the first capacitor is electrically connected to a capacitor line,
• wherein one of a source and a drain of the second transistor is electrically connected to a pixel electrode of the second liquid crystal element,
• wherein a first electrode of the second capacitor is electrically connected to the pixel electrode of the second liquid crystal element,
• wherein a second electrode of the second capacitor is electrically connected to the capacitor line,
• wherein the holding signal generation circuit is configured to supply a constant voltage to the capacitor line during a first frame period,
• wherein the holding signal generation circuit is configured to supply a holding signal to the capacitor line during a second frame period such that a change of a voltage applied to the first liquid crystal element and a change of a voltage applied to the second liquid crystal element are reduced, and
• wherein the second frame period is longer than the first frame period.