Patent ID: 11929034
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A display device comprising:
a first pixel;
a second pixel; and
a power supply,
wherein the first pixel includes:
a first light emitting unit electrically connected between a first power line and a second power line;
a first driving transistor electrically connected between the first power line and the first light emitting unit, the first driving transistor controlling a current flowing into the first light emitting unit, based on a first data signal from a first data line to a gate electrode of the first driving transistor;
a first initialization transistor electrically connected between the gate electrode of the first driving transistor and a third power line; and
a first switching transistor electrically connected between a first electrode of the first light emitting unit and a first sub-power line,
the first driving transistor includes a first semiconductor material, and the first initialization transistor includes a second semiconductor material different from the first semiconductor material,
wherein the second pixel includes:
a second light emitting unit electrically connected between the first power line and the second power line,
a second driving transistor electrically connected between the first power line and the second light emitting unit, the second driving transistor controlling a current flowing into the second light emitting unit, based on a second data signal from a second data, line to a gate electrode of the second driving transistor;
a second initialization transistor electrically connected between the gate electrode of the second driving transistor and the third power line; and
a second switching transistor electrically connected between a first electrode of the second light emitting unit and a second sub-power line, and
the second sub-power line is electrically disconnected from the first sub-power line, and
wherein:
the power supply applies a same voltage to the first sub-power line and the second sub-power line in a first mode; and
the power supply applies different test signals respectively to the first sub-power line and the second sub-power line in a second mode.