EL display panel module, EL display panel, integrated circuit device, electronic apparatus and driving controlling method
View Patent ↗An EL display panel includes light emitting pixels disposed in a matrix and a driving circuit for driving the pixels. The driving circuit drives the pixels such that a threshold value correction operation is carried out commonly (simultaneously) for a group of multiple pixels, which are connected to a same signal line, and such that an operation of writing a signal potential corresponding to a gradation value is executed individually (time-sequentially) for the pixels in the group. The driving circuit applies a reset potential to the pixels in the group before executing the signal writing operation. The reset potential is lower than a reference potential that is used for the threshold value correction operation.
1. An electro luminescence display device having a pixel array section,
the pixel array section comprising a driving circuit and a plurality of pixels disposed in a matrix,
wherein the driving circuit is configured to drive the plurality of pixels such that:
a reset potential lower than a reference potential is supplied to each pixel of a group simultaneously before any corresponding signal potential is written into a pixel of the group for a given frame, the group comprising more than one pixels that are connected to a same signal line,
a threshold value correction operation is carried out simultaneously for each pixel of the group, where the threshold value correction operation includes supplying the reference potential to the respective pixels for which the threshold value correction operation is performed, and
a corresponding signal potential is sequentially written into each pixel of the group through the same signal line after the threshold value correction operation has been completed for the given frame period, where the corresponding signal potential written into each pixel corresponds to a gradation value for that respective pixel for the given frame period.
2. The electro luminescence display device according to claim 1 , wherein the group includes pixels that are positioned on different horizontal lines.
3. The electro luminescence display device according to claim 1 , wherein the group includes pixels that are positioned on the same horizontal line.
4. The electro luminescence display device according to claim 1 , wherein the group comprises a red pixel, a green pixel, and a blue pixel.
5. The electro luminescence display device according to claim 4 , wherein each pixel of the group is configured to be controlled by a same write scan line.
6. The electro luminescence display device according to claim 1 , wherein the reset potential is applied to the each pixel of the group through the same signal line and through the write transistor of the respective pixel.
7. The electro luminescence display device according to claim 1 , wherein the pixel array section further comprises a plurality of power supply lines that supply current to the plurality of pixels;
a high potential is supplied on the plurality of power supply lines; and
the driving circuit is further configured to apply a threshold preparation potential lower than the high potential to each pixel of the group prior to carrying out the threshold value correction operation.
8. The electro luminescence display device according to claim 7 , wherein the threshold preparation potential is applied through the plurality of power supply lines.
9. A driving method for a pixel array section of an electro luminescence display device, the pixel array section comprising a plurality of pixels disposed in a matrix, and the driving method comprising:
supplying a reset potential lower than a reference potential to each pixel of a group simultaneously before any corresponding signal potential is written into a pixel of the group for a given frame, the group comprising more than one pixels that are connected to a same signal line, simultaneously executing a threshold value correction operation for each pixel of the group, where the threshold value correction operation includes supplying the reference potential to the respective pixels for which the threshold value correction operation is performed, and
writing a corresponding signal potential into each pixel of the group through the same signal line after the threshold value correction operation has been completed for the given frame period, where the corresponding signal potential written into each pixel corresponds to a gradation value for that respective pixel for the given frame period.