Display device with optics for brightness uniformity tuning having DOE optically coupled to receive light at central and peripheral regions

US10162181B2 · kind B2 · utility

Assignee

• MICROSOFT TECHNOLOGY LICENSING, LLC · US

Inventors

• James Randolph Webster · San Jose, US
• Jeb Wu · Redmond, US
• Steven John Robbins · Redmond, US
• Tuomas Vallius · Espoo, FI
• Yarn Chee Poon · Redmond, US

Key dates

• Filing date: Dec 3, 2015
• Grant date: Dec 25, 2018
• Expiry date: May 13, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B7/1353
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Introduced here is a display device that comprises a light emitter and a diffractive optical element (DOE) that is optically coupled to receive light from the light emitter and to convey the light along an optical path. The DOE may have an input surface and an output surface parallel to the input surface, where the input surface and the output surface each have a central region and a peripheral region. The DOE further may have optical characteristics such that light exiting the DOE in the peripheral region of the output surface has greater brightness than light exiting the DOE in the central region of the output surface.