The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2025
Filed:
Dec. 05, 2023
Xerox Corporation, Norwalk, CT (US);
Jeng Ping Lu, Freemont, CA (US);
Sourobh Raychaudhuri, Mountain View, CA (US);
Eugene Michael Chow, Palo Alto, CA (US);
Thomas Wunderer, Santa Cruz, CA (US);
Patrick Yasuo Maeda, San Jose, CA (US);
Genesee Valley Innovations, LLC, Santa Clara, CA (US);
Abstract
A machine vision system and method uses photoluminescence light response of micro-LEDs to identify types of micro-LEDs (e.g., red, green, or blue) that are used to assemble a micro-LED display. Excitation light (e.g., ultraviolet excitation light) in a certain wavelength range is illuminated on a random pool of heterogeneous micro-LEDs consisting of materials, for example, that photoluminesce in three different colors-red, green, or blue. The micro-LED is optically excited and will emit either red, green, or blue, photoluminescence light based on the type of the micro-LED. The machine vision system uses a camera device that includes color response sensors to differentiate the type of micro-LED. The orientation of the micro-LED can also be detected. The machine vision system, based on the type, location, and orientation of the heterogeneous micro-LEDs, provides image-data based optical feedback to a microassembler system to move the micro-LEDs on a planar working surface according to an electrostatic template.