Display device and electronic apparatus
A display unit includes sub-pixels that each have a light emitting element, a capacitor, a first transistor that writes a video signal potential to the capacitor, and a second transistor that provides a drive current to the light emitting element based on a voltage stored in the capacitor. Each first transistor has a channel width W and channel length L, such that a width to length ratio is W/L. The width to length ratio W 1 /L 1 of one of the first transistors is different than a width-to-length ratio W 2 /L 2 of at least one other of the first transistors.
1. A display device comprising:
a plurality of pixels, respective ones of the plurality of pixels including four sub-pixels consisting of an R sub-pixel, a G sub-pixel, a B sub-pixel, and a W sub-pixel, respective ones of the four sub-pixels including a light emitting element, a capacitor, a first transistor configured to provide a potential to the capacitor, and a second transistor configured to provide a drive current to the light emitting element based on a voltage stored in the capacitor;
a plurality of a first lines respectively extending along a first direction and configured to propagate a control voltage, the plurality of first lines respectively connected to control terminals of the first transistors of the four sub-pixels;
a plurality of second lines respectively extending along a second direction perpendicular to the first direction,
wherein the first transistors of the four sub-pixels are dimensioned such that either:
a channel length of the first transistor of a first sub-pixel of the four sub-pixels and the first transistor of a second sub-pixel of the four sub-pixels is greater than a channel length the first transistor of a third sub-pixel of the four sub-pixels and the first transistor of a fourth sub-pixel of the four sub-pixels, or
a channel width of the first transistor of the first sub-pixel and the first transistor of the second sub-pixel is greater than a channel width of the first transistor of the third sub-pixel and the first transistor of the fourth sub-pixel.
2. The display device according to claim 1 , wherein, in respective ones of the four sub-pixels, a first current terminal of the first transistor is connected to one of the plurality of second lines and a second current terminal of the second transistor is connected to a first electrode of the capacitor.
3. The display device according to claim 1 , wherein, in respective ones of the four sub-pixels, a first terminal of the second transistor is connected to a third line and a second terminal of the second transistor is connected to an anode electrode of the light emitting element.
4. The display device according to claim 1 , wherein the first transistor is set to a conductive state during a correction period to detect a current through the second transistor.
5. The display device according to claim 1 , wherein the first transistor is a sampling transistor.
6. The display device according to claim 1 , wherein the second transistor is a driving transistor.
7. The display device according to claim 1 , wherein the plurality of second lines are configured to supply a video signal.