Electro-optic displays with reduced remnant voltage, and related apparatus and methods

A method of reducing remnant voltage of an active matrix electro-optic display having a front electrode and a plurality of pixels each having a rear electrode, where each rear electrode is coupled to a n-type pixel transistor associated with a respective pixel of the plurality of pixels, the method comprising:

• grounding the source of each of the n-type pixel transistors;
• applying a positive voltage to the gate of each of the n-type pixel transistors to activate the n-type transistors, wherein the voltage is applied until a set remnant voltage value is achieved;
• and
• grounding the front electrode to create a conduction path for draining the remnant voltage.

A method of reducing remnant voltage of an active matrix electro-optic display having a front electrode and a plurality of pixels each having a rear electrode, where each rear electrode is coupled to a p-type pixel transistor associated with a respective pixel of the plurality of pixels, the method comprising:

• grounding the source of each of the p-type pixel transistors;
• applying a negative voltage to the gate of each of the p-type pixel transistors to activate the p-type transistors, wherein the voltage is applied until a set remnant voltage value is achieved;
• and
• grounding the front electrode to create a conduction path for draining the remnant voltage.

A method of reducing remnant voltage of an active matrix electro-optic display having a front electrode, a plurality of pixels each having a rear electrode, where each rear electrode is coupled to a n-type pixel transistor associated with a respective pixel of the plurality of pixels, the method comprising:

• applying to the front electrode a negative voltage;
• applying to the source of each of the n-type pixel transistors approximately the same negative voltage as the front electrode;
• and
• grounding the gate of each of the n-type pixel transistors to create a conduction path for draining the remnant voltage.

A method of reducing remnant voltage of an active matrix electro-optic display having a front electrode and a plurality of pixels each having a rear electrode, where each rear electrode is coupled to a p-type pixel transistor associated with a respective pixel of the plurality of pixels, the method comprising:

• applying to the front electrode a positive voltage;
• applying to the source of each of the p-type pixel transistors approximately the same positive voltage as the front electrode;
• and
• grounding the gate of each of the p-type pixel transistors to create a conduction path for draining the remnant voltage.