Patent ID: 11922875
Assignee: SHARP KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A display device including a display portion that includes a plurality of data signal lines, a plurality of scanning signal lines intersecting the plurality of data signal lines, and a plurality of emission control lines disposed along the plurality of scanning signal lines, in such a manner that the pixel circuit corresponds to any one of the plurality of data signal lines, corresponds to any one of the plurality of scanning signal lines, and corresponds to any one of the plurality of emission control lines, the display device comprising:
a plurality of pixel circuits disposed on the display portion along the plurality of data signal lines and the plurality of scanning signal lines so as to correspond to one of the plurality of data signal lines, each correspond to one of the plurality of scanning signal lines, and each correspond to one of the plurality of emission control lines;
a data-side drive circuit configured to generate a plurality of dates signals indicating data voltages to be written to the plurality of pixel circuits and configured to apply the data signals to the plurality of data signal lines;
a scanning-side drive circuit configured to selectively drive the plurality of scanning signal lines and selectively deactivate the plurality of emission control lines; and
a display control circuit configured to control the data-side drive circuit and the scanning-side drive circuit such that a drive period and a pause period appear alternately, the drive period including a refresh frame period during which data voltages are written to the plurality of pixel circuits by selective driving of the plurality of scanning signal lines, the pause period including a non-refresh frame period during which writing of data voltages to the plurality of pixel circuits is stopped with the plurality of scanning signal lines in an unselected state; wherein
each of the plurality of pixel circuits includes:
a display element driven by a current;
a holding capacitor;
a drive transistor configured to control a current flowing through the display element in accordance with a data voltage held in the holding capacitor;
a write control switching element having a control terminal connected to a corresponding scanning signal line;
at least one emission control switching element that has a control terminal connected to a corresponding emission control line and is connected in series with the display element; and
an initialization circuit configured to initialize the display element;

the initialization circuit includes a display element initialization switching element and is configured such that when a voltage of the corresponding emission control line is at a level for turning off the emission control switching element, an initialization voltage for initializing the display element is applied to the display element via the display element initialization switching element based on the voltage of the corresponding emission control line; and
the display control circuit is configured to:
control the data-side drive circuit and the scanning-side drive circuit such that during the drive period, the data-side drive circuit generates the plurality of data signals and applies the generated data signals to the plurality of data signal lines, and the scanning-side drive circuit selectively drives the plurality of scanning signal lines and selectively deactivates the plurality of emission control lines; and
control the data-side drive circuit and the scanning-side drive circuit such that during the pause period, the data-side drive circuit stops the application of the plurality of data signals to the plurality of data signal lines, and the scanning-side drive circuit stops the driving of each of the plurality of scanning signal lines and selectively deactivates the plurality of emission control lines.