DISPLAY ELEMENT PIXEL CIRCUIT WITH VOLTAGE EQUALIZATION

摘要

This disclosure provides systems, methods and apparatus for improving the reliability of dual actuator light modulators by equalizing voltages provided to the two actuators of the light modulator. A pixel circuit for driving the dual actuator light modulator can include a data loading circuit coupled to an actuation circuit. The data loading circuit is utilized to store data received from a controller for a pixel associated with the light modulator. The actuation circuit is utilized to control a first actuator and a second actuator of the dual actuator light modulator based on the data stored by the data loading circuit. The actuation circuit includes a first stabilization capacitor and the second stabilization capacitor for stabilizing voltages provided to the first and second actuators. The actuation circuit also includes an equalization switch for equalizing voltages provided to the first and second actuators.

主权项

1. An apparatus comprising:
an array of display elements; and a control matrix configured to control the optical output of the array of display elements, the control matrix including for each of the display elements:
a first circuit including:
a first charge transistor configured to govern the application to a first node of a respective display element of a first actuation voltage supplied by a first actuation voltage interconnect, anda first discharge transistor configured to selectively discharge the voltage applied to the first node in response to a data signal supplied to the gate of the first discharge transistor;a second circuit including:
a second charge transistor configured to govern the application to a second node of the respective display element of a second actuation voltage, anda second discharge transistor configured to selectively discharge the voltage applied to the second node in response to the voltage on the first node; anda voltage equalization switch selectively coupling the first node to the second node in response to the first actuation voltage supplied by the first actuation interconnect.