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:
Sep. 30, 2025
Filed:
Nov. 14, 2023
Varjo Technologies Oy, Helsinki, FI;
Ville Timonen, Helsinki, FI;
Tuomas Tölli, Helsinki, FI;
Varjo Technologies Oy, Helsinki, FI;
Abstract
Disclosed is head-mounted display (HMD) apparatus with an ambient light sensor (ALS), tracking camera (TC), video-see-through (VST) camera, and processor(s) configured to: capture average red-green-blue (RGB) illuminance (A) of region of real-world environment (RE) from HMD pose; capture grayscale image (GI) of RE from HMD pose, wherein pixel values indicate intensities (i); calculate average TC intensity (I) for part of FOV of TC that overlaps with FOV of ALS, based on intensities (i); calculate average illuminance (J) for said part of FOV of TC that overlaps with FOV of ALS, based on intensities (i) and pre-determined response (r) of ALS; calculate corrected average RGB illuminance (AC) for region from HMD pose, based on A and ratio of I and J; and determine RGB illuminance for each pixel of GI, based on AC, ratio of intensity (i) of said pixel in GI to I.