Patent ID: 8659543
Filing Date: 2014-02-25
Classification: G09G

Abstract:
1. A control method of an electro-optic device including: a plurality of pixels, each of the plurality of pixels including a pixel electrode disposed at an intersection between a plurality of scanning lines and a plurality of signal lines, an electro-optic element which enters a first optical state from a second optical state for a first time by accumulatively applying a first voltage via the pixel electrodes during a first plurality of periods and enters the second optical state from the first optical state for a second time by accumulatively applying a second voltage during a second plurality of periods, a memory circuit which is disposed in each of the plurality of pixels includes a first input terminal connected to a first scanning line among the plurality of scanning lines, a second input terminal connected to a first signal line among the plurality of signal lines, and a first output terminal, and holds a third voltage applied to the first signal line after the first scanning line is selected, a switching circuit which is disposed in each of the plurality of pixels includes a control input terminal connected to the first output terminal, a third input terminal connected to a power voltage line, and a second output terminal connected to the pixel electrode, and controls a conduction state between the third input terminal and the second output terminal in accordance with a signal supplied to the control input terminal, and a scanning line driving circuit which supplies a selection signal for selecting one of the plurality of scanning lines, the control method comprising: determining which condition is satisfied among a plurality of conditions based on first data stored in a memory register storing the first data indicating the optical state of the plurality of pixels, the plurality of conditions including: applying a fourth voltage for causing the switching circuit to enter an ON state to the first signal line corresponding to the first pixels, applying a fifth voltage for causing the switching circuit to enter an OFF state to a third signal line corresponding to the third pixels, and applying the first voltage to the power voltage line, after determining that the plurality of pixels satisfy the first condition during one of the first and second pluralities of periods; applying the fourth voltage for causing the switching circuit to enter the ON state to a second signal line corresponding to the second pixels, applying the fifth voltage for causing the switching circuit to enter the OFF state to the third signal line corresponding to the third pixels, and applying the second voltage to the power voltage line, after determining that the plurality of pixels satisfy the second condition during one of the first and second pluralities of periods; and alternately repeating, at a predetermined frequency, a first period for applying the fourth voltage for causing the switching circuit to enter the ON state to the first signal line corresponding to the first pixels, applying the fifth voltage for causing the switching circuit to enter the OFF state to the third signal line corresponding to the third pixels, and applying the first voltage to the power voltage line and a second period for applying the fourth voltage for causing the switching circuit to enter the ON state to the second signal line corresponding to the second pixels, applying the fifth voltage for causing the switching circuit to enter the OFF state to the third signal line corresponding to the third pixels, and applying the second voltage to the power voltage line, after determining that the plurality of pixels satisfy the third condition during one of the first and second pluralities of periods.