Method of driving electrooptic device, driving circuit, electrooptic device, and electronic apparatus

A driving circuit for an electro-optical device, which drives pixels including pixel electrodes provided corresponding to respective intersections of a plurality of scanning lines and a plurality of data lines and switching devices for establishing conduction between the data lines and the pixel electrodes when scanning signals are supplied to the scanning lines, the driving circuit comprising:

• a scanning-line driving circuit for sequentially supplying, in a first time period forming part of a single time frame, the scanning signals to the respective scanning lines for every sub-field obtained by dividing the first time period into sub-fields, and for sequentially supplying the scanning signals, which make the switching devices conducting, to the respective scanning lines in a second time period of the single time frame, excluding the first time period, the second time period being dispersed in the period of the single frame;
• and
• a data-line driving circuit for supplying, in the first time period, a sequence of two-level signals, each two-level signal designating turning on or off a respective pixel for a period of a sub-field, to the data lines which correspond to the pixels in a period for supplying the scanning signals to the scanning lines which correspond to the pixels, the cumulation of on periods during the first time period of the single time frame being variably controlled in accordance with a gray-scale level of the respective pixel for a gray-scale display, and for supplying, in the second time period, a signal which designates applying an effective voltage to the pixels in accordance with a threshold value of a transmissivity characteristic relative to a voltage applied to electro-optical material used in the electro-optical device to the data lines which correspond to the pixels, turning on and off periods in the second time period being separated in a time period of one frame and the first time period being inserted between the turning on and off periods.

A driving circuit for an electro-optical device, which drives pixels including pixel electrodes corresponding to intersections of a plurality of scanning lines and a plurality of data lines, and switching devices for establishing conduction between the data lines and the pixel electrodes, when scanning signals are supplied to the scanning lines, the driving circuit comprising:

• a scanning-line driving circuit for sequentially supplying, in a first time period forming part of a single time frame, the scanning signals to the respective scanning lines for every sub-field which is obtained by dividing the first time period into sub-fields, and for sequentially supplying the scanning signals, which make the switching devices conducting, to the respective scanning lines in a second time period of the single time frame, excluding the first time period, the second time period being dispersed in the period of the single time frame;
• and
• a data-line driving circuit for supplying, in the first period, a sequence of two-level signals, each two-level signal designating turning on or off of a respective pixel for a period of a sub-field, to the data lines which correspond to the pixels in a period for supplying the scanning signals to the scanning lines which correspond to the pixels, the cumulation of on periods during the first time period of the single time frame being variably controlled in accordance with a gray-scale level of the respective pixel for a gray-scale display, and for supplying, in the second time period, a signal which designates turning on of the pixels in accordance with a threshold value of a transmissivity characteristic relative to a voltage applied to electro-optical material used in the electro-optical device to the data lines which correspond to the pixels, turning on and off periods in the second time period being separated in a time period of one frame and the first time period being inserted between the turning on and off periods.

An electro-optical device, comprising:

• an element substrate comprising pixel electrodes corresponding to respective intersections of a plurality of scanning lines and a plurality of data lines and switching devices, being provided for the respective pixel electrodes, to control conduction between the data lines and the pixel electrodes based on scanning signals supplied through the scanning lines;
• an opposing substrate comprising a counter electrode being opposed to the pixel electrodes;
• electro-optical material held between the element substrate and the opposing substrate;
• a scanning-line driving circuit for sequentially supplying, in a first time period forming part of a single time frame, the scanning signals to the respective scanning lines for every sub-field which is obtained by dividing the first time period into sub-fields, and for sequentially supplying the scanning signals, which make the switching devices conducting, to the respective scanning lines in a second time period of the single time frame, excluding the first time period, the second time period being dispersed in the period of the single time frame;
• and
• a data-line driving circuit for supplying, in the first time period, a sequence of two-level signals, each two-level signal designating turning on or off a respective pixel for a period of a sub-field, to the data lines which correspond to the pixels in a period for supplying the scanning signals to the scanning lines which correspond to the pixels, the cumulation of on periods during the first time period of the single time frame being variably controlled in accordance with a gray-scale level of the respective pixel for a gray-scale display, and for supplying, in the second time period, a signal which designates turning on or off the pixels in accordance with a threshold value of a transmissivity characteristic relative to a voltage applied to electro-optical material used in the electro-optical device to the data lines which correspond to the pixels, turning on and off periods in the second time period being separated in a time period of one frame and the first time period being inserted between the turning on and off periods.

An electro-optical device, comprising:

• an element substrate comprising pixel electrodes corresponding to respective intersections of a plurality of scanning lines and a plurality of data lines and switching devices, being provided for the respective pixel electrodes, to control conduction between the data lines and the pixel electrodes based on scanning signals supplied through the scanning lines;
• an opposing substrate comprising a counter electrode being opposed to the pixel electrodes;
• electro-optical material held between the element substrate and the opposing substrate;
• a scanning-line driving circuit for sequentially supplying, in a first time period forming part of a single time frame, the scanning signals to the respective scanning lines for every sub-field obtained by dividing the first time period into sub-fields, and for sequentially supplying the scanning signals, which make the switching devices conducting, to the respective scanning lines in a second time period of the single time frame, excluding the first time period, the second time period being dispersed in the period of the single time frame;
• and
• a data-line driving circuit for supplying, in the first time period, a sequence of two-level signals, each two-level signal designating turning on or off a respective pixel for a period of a sub-field, to the data lines which correspond to the pixels in a period for supplying the scanning signals to the scanning lines which correspond to the pixels, the cumulation of on periods during the first time period of the single time frame being variably controlled in accordance with a gray-scale level of the respective pixel for a gray-scale display, and for supplying, in the second time period, a signal which turns on the pixels in accordance with a threshold value of a transmissivity characteristic relative to a voltage applied to the electro-optical material used in the electro-optical device to the data lines which correspond to the pixels, turning on and off periods in the second time period being separated in a time period of one frame and the first time period being inserted between the turning on and off periods.