Electro-optical device, driving method of electro-optical device, control circuit of electro-optical device, and electronic apparatus

1. An electro-optical device comprising:

a display unit in which an electro-optical material layer is interposed between a pair of substrates and a plurality of pixels are arranged; and

a control unit that drives and controls the display unit,

wherein the control unit performs a differential driving operation of performing an operation of erasing a first image component which is a part of a display image in a first display state and an operation of displaying a second image component which is a part of a display image in a second display state by selectively driving the pixels having different gray scales in the first display state and the second display state when the display unit is changed from the first display state to the second display state, and

the operation of erasing the first image component includes an extended erasing operation of driving a first pixel group which includes the pixels constituting the first image component and the pixels being adjacent to the first image component and surrounding the first image component,

wherein the extended erasing operation includes driving the first pixel group with a different gray scale from a first gray scale which the pixels of the first pixel group were driven during the first display state and wherein the different gray scale is also different from a second gray scale with which the pixels of the first pixel group will be driven in the second display state.

2. The electro-optical device according to claim 1 , wherein the extended erasing operation is an operation of driving the pixels in a region obtained by extending the first image component to the outside by one pixel.

3. The electro-optical device according to claim 1 , wherein the control unit performs a first differential driving operation including a selective erasing operation of selectively driving the pixels belonging to the first image component and a second differential driving operation including the extended erasing operation.

4. The electro-optical device according to claim 1 , wherein

a plurality of scanning lines and a plurality of data lines extending in directions intersecting each other are formed in the display unit and the plurality of pixels are arranged at positions corresponding to intersections of the plurality of scanning lines and the plurality of data lines,

a period in which the plurality of scanning lines are sequentially selected once is defined as one frame, and

the control unit performs the differential driving operation over a plurality of frames, performs the extended erasing operation in the differential driving operation on some frames of the plurality of frames, and performs a selective erasing operation of selectively driving the pixels belonging to the first image component in the differential driving operation on the other frames.

5. The electro-optical device according to claim 1 , wherein the control unit excludes the pixels belonging to the second image component from the first pixel group in the extended erasing operation.

6. The electro-optical device according to claim 1 , wherein

the pixels displayed in a first gray scale and the pixels displayed in a second gray scale different from the first gray scale are arranged in the display unit in the second display state,

the first image component includes the pixels that are displayed in the first gray scale in the second display state and that are displayed in a gray scale other than the first gray scale in the first display state, and

the second image component includes the pixels that are displayed in the second gray scale in the second display state and that are displayed in a gray scale other than the second gray scale in the first display state.

7. The electro-optical device according to claim 1 , wherein the display unit includes memory display elements.

8. An electronic apparatus comprising the electro-optical device according to claim 1 .

9. A driving method of an electro-optical device having a display unit in which an electro-optical material layer is interposed between a pair of substrates and a plurality of pixels are arranged, the method comprising:

a display updating step of changing the display unit from a first display state to a second display state including a differential driving step of performing an operation of erasing a first image component which is a part of a display image in the first display state and an operation of displaying a second image component which is a part of a display image in the second display state by selectively driving the pixels having different gray scales in the first display state and the second display state,

wherein the operation of erasing the first image component includes an extended erasing operation of driving a first pixel group which includes the pixels constituting the first image component and the pixels being adjacent to the first image component and surrounding the first image component,

wherein the extended erasing operation includes driving the first pixel group with a different gray scale from a first gray scale which the pixels of the first pixel group were driven during the first display state and wherein the different gray scale is also different from a second gray scale with which the pixels of the first pixel group will be driven in the second display state.

10. The driving method according to claim 9 , wherein a first differential driving step including a selective erasing operation of selectively driving the pixels belonging to the first image component and a second differential driving step including the extended erasing operation are performed.

11. The driving method according to claim 9 , wherein

a plurality of scanning lines and a plurality of data lines extending in directions intersecting each other are formed in the display unit and the plurality of pixels are arranged at positions corresponding to intersections of the plurality of scanning lines and the plurality of data lines,

a period in which the plurality of scanning lines are sequentially selected once is defined as one frame, and

the differential driving step of the display updating step is performed over a plurality of frames, the extended erasing operation is performed in the differential driving step over some frames of the plurality of frames, and a selective erasing operation of selectively driving the pixels belonging to the first image component is performed in the differential driving step over the other frames.

12. The driving method according to claim 9 , wherein the pixels belonging to the second image component are excluded from the first pixel group in the extended erasing operation.

13. A control circuit of an electro-optical device having a display unit in which an electro-optical material layer is interposed between a pair of substrates and a plurality of pixels are arranged,

wherein a differential driving operation of performing an operation of erasing a first image component which is a part of a display image in a first display state and an operation of displaying a second image component which is a part of a display image in a second display state is performed by selectively driving the pixels having different gray scales in the first display state and the second display state when the display unit is changed from the first display state to the second display state, and

the operation of erasing the first image component includes an extended erasing operation of driving a first pixel group which includes the pixels constituting the first image component and the pixels being adjacent to the first image component and surrounding the first image component,

wherein the extended erasing operation includes driving the first pixel group with a different gray scale from a first gray scale which the pixels of the first pixel group were driven during the first display state and wherein the different gray scale is also different from a second gray scale with which the pixels of the first pixel group will be driven in the second display state.

14. The control circuit according to claim 13 , wherein a first differential driving operation including a selective erasing operation of selectively driving the pixels belonging to the first image component and a second differential driving operation including the extended erasing operation are performed.

15. The control circuit according to claim 13 , wherein the pixels belonging to the second image component are excluded from the first pixel group in the extended erasing operation.