Methods for forming image transport layers for electronic devices
AssigneeApple Inc.
InventorsWei Lin, Nathan K. Gupta, Shubhaditya Majumdar, Prabhakar Gulgunje
Life of this patent
Estimating the term…
Abstract
An electronic device may have a housing with a display. A protective display cover layer for the display may have an image transport layer such as an image transport layer formed from Anderson localization material. Anderson localization material may be formed using equipment such as heated molds, extrusion equipment, fusion tools, and fiber drawing equipment. The materials used to form a block of Anderson localization material may be polymers or other transparent materials. Elevated temperatures such as temperatures above the melting points of the polymers may be used during extrusion, fusion, drawing, and other operations.
Claims12
A method of forming a display cover layer for an electronic device display, comprising:
- with an extruder, extruding elongated members each having areas of transversely randomized refractive index associated with a plurality of corresponding elongated filaments, wherein the elongated members comprise polymer materials with respective melting temperatures;
- with a fuser, fusing together the elongated members to form a preform;
- in a draw tower, drawing the preform down to form a fiber at a temperature that is larger than the melting temperatures;
- and
- fusing together lengths of the fiber to form material for the display cover layer.
A method of forming Anderson localization material, comprising:
- with an extruder, extruding elongated members each having areas of transversely randomized refractive index associated with a plurality of corresponding elongated filaments;
- fusing together the elongated members to form a preform;
- in a draw tower, drawing the preform down to form a fiber, wherein drawing the preform down to form the fiber comprises lowering the preform between first heated walls and second heated walls in that order, wherein the first heated walls are heated to a first temperature and the second heated walls are heated to a second temperature that is greater than the first temperature;
- and
- fusing together lengths of the fiber to form the Anderson localization material.
Dependencies are inferred from the claim text.