A control element of an organic electro-luminescent display includes a
first transistor, a second transistor and a capacitor. The first gate
electrode of the first transistor is electrically connected to a scan
line, and the first source/drain electrode of the first transistor is
electrically connected to a data line. The second gate electrode of the
second transistor is electrically connected to the second source/drain
electrode of the first transistor. The third source/drain electrode of
the second transistor is electrically connected to a working voltage, and
the fourth source/drain electrode of the second transistor is
electrically connected to a light emitting diode. One end of the
capacitor is electrically connected to the second gate electrode. The
material of the dielectric layer of the capacitor is different from the
material of the gate dielectric of one of the first transistor and the
second transistor.