Display apparatus with narrow gap electrostatic actuators

US9134552B2 · kind B2 · utility

Assignee

• Pixtronix, Inc. · US

Inventors

• Cait Ni Chleirigh · Arlington, US
• Mark B. Andersson · Northborough, US
• Tyler Adam Dunn · Westford, US
• Joyce H. Wu · Somerville, US

Key dates

• Filing date: Mar 13, 2013
• Grant date: Sep 15, 2015
• Expiry date: Aug 12, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G09G2300/08
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

This disclosure provides systems, methods and apparatus for incorporating tip-gap adjustment features (TGAF) in actuators of shutter assemblies. The TGAF are incorporated into a drive beam of the actuator during the formation of the shutter assembly over a mold. The TGAF are configured such that they develop a mechanical stress or stress gradient. When the shutter assembly is released from the mold, the stress or stress gradient in the TGAF bend the drive beam such that a tip-gap between the drive beam and a load beam of the actuator is reduced. The reduced tip-gap, in turn, reduces an actuation voltage needed to actuate the shutter assembly.