The invention discloses an
OLED pixel circuit, a
display device and a control method. The
OLED pixel circuit comprises an organic
light emitting diode, a driving
transistor, a first switch unit, a grid
electrode connecting a
data signal output terminal with the driving
transistor, a second switch unit, a source
electrode connecting a power source
signal output terminal with the driving
transistor, a compensating circuit connected with the grid
electrode of the driving transistor and used for maintaining the
voltage of the grid electrode of the driving transistor in the light emitting stage to enable the current flowing through the organic
light emitting diode to be unrelated to the
threshold voltage Vth of the driving transistor and a reference
signal generating module used for generating a reference
signal for being used by the compensating circuit according to the
current threshold voltage of the driving transistor, wherein the
voltage of the reference signal and the
threshold voltage meet at least one come-into-effect condition enabling the compensating circuit to come into effect. The
OLED pixel circuit, the
display device and the control method enlarge the compensating range of the compensating circuit.