Displays with gate driver circuitry for discharging display pixels

Abstract

A touch screen display may include gate line driver circuitry coupled to a display pixel array. The gate driver circuitry may include gate drivers connected in a chain. A given one of the gate drivers may include a set-reset latch. The set-reset latch may have a set input and a reset input. A logic gating circuit such as a logic NOR gate may have an output directly connected to the set input. The NOR gate may have a first input coupled to an output of a preceding gate driver in the chain and a second input coupled to an output of a succeeding gate driver. The reset input may be coupled to the output of the preceding gate driver. Gate line output signals may be simultaneously asserted for each of the drivers without generating unstable scenarios where logic high signals are provided to the set and reset inputs.