# US 2025/0095604 A1 · Dimming device angular uniformity correction > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0095604 A1 - Document ID: US20250095604A1 - Status: Published application - Kind: A1 - Application number: 18/966,688 - Filed: 2024-12-03 - Published: 2025-03-20 - Earliest claimed: 2022-06-07 - Assignees: Magic Leap, Inc. - Applicants: Magic Leap, Inc. - Inventors: Ricardo Arencibia; Zachary Michael Llaneras; Jason Schaefer; Howard Russell Cohen; Hui-Chuan Cheng; Michael Alexander Sours - Web page: https://patentgrep.com/patent/US20250095604A1 ## CPC - G09G 3/002: {to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT} - G09G 3/3696: {Generation of voltages supplied to electrode drivers} - G02B 27/0172: {characterised by optical features} - G09G 3/003: {to produce spatial visual effects} - G09G 3/36: using liquid crystals - G09G 2300/023: Display panel composed of stacked panels - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2320/0626: for control of overall brightness - G09G 2320/0673: for control of gamma adjustment, e.g. selecting another gamma curve - G09G 2320/068: for control of viewing angle adjustment - G09G 2354/00: Aspects of interface with display user - G09G 2360/144: the light being ambient light - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A method of operating an optical system includes identifying a set of angle dependent transmittance levels for light passing through pixels of a segmented dimmer exhibiting viewing angle transmittance variations for application of a same voltage to all pixels of the segmented dimmer. The method also includes determining a set of voltages to apply to pixels of the segmented dimmer. Determining the set of voltages includes using the set of angle dependent transmittance levels. The method includes applying the set of voltages to the pixels of the segmented dimmer to achieve light transmittance through the segmented dimmer corresponding to the set of angle dependent transmittance levels. ## Claims ### Claim 1 A method of operating an optical system, the method comprising: identifying a set of angle dependent transmittance levels for light passing through pixels of a segmented dimmer exhibiting viewing angle transmittance variations for application of a same voltage to all pixels of the segmented dimmer; determining a set of voltages to apply to pixels of the segmented dimmer, wherein determining the set of voltages includes using the set of angle dependent transmittance levels; and applying the set of voltages to the pixels of the segmented dimmer to achieve light transmittance through the segmented dimmer corresponding to the set of angle dependent transmittance levels. ### Claim 2 (depends on 1) The method of claim 1, wherein determining the set of voltages comprises determining receipt coordinates associated with the pixels of the segmented dimmer and rendering the set of voltages using one or more lookup tables based on the receipt coordinates, wherein a lookup table is associated with a corresponding angle dependent transmittance level. ### Claim 3 (depends on 2) The method of claim 2, wherein the receipt coordinates include one or more distance coordinates or one or more angular coordinates. ### Claim 4 (depends on 1) The method of claim 1, further comprising identifying an eye position for collecting light transmitted through the segmented dimmer, wherein determining the set of voltages includes using the set of angle dependent transmittance levels and the eye position. ### Claim 5 (depends on 4) The method of claim 4, wherein determining the set of voltages includes: identifying angles for each pixel of the segmented dimmer based on the eye position of a user, and for each pixel, applying the angles to a lookup table associated with an angle dependent transmittance level for the pixel to determine an output voltage to apply to the pixel. ### Claim 6 (depends on 1) The method of claim 1, wherein a set of voltages comprises voltages for each of the pixels of the segmented dimmer. ### Claim 7 (depends on 1) The method of claim 1, wherein the set of angle dependent transmittance levels is a same level for all pixels of the segmented dimmer. ### Claim 8 (depends on 1) The method of claim 1, wherein the set of angle dependent transmittance levels includes independent transmittance levels for different pixels of the segmented dimmer. ### Claim 9 (depends on 1) The method of claim 1, further comprising determining a temperature of the segmented dimmer, wherein determining the set of voltages includes using the set of angle dependent transmittance levels and the temperature. ### Claim 10 (depends on 1) The method of claim 1, further comprising, for each of a plurality of different angle dependent transmittance levels, generating a lookup table providing voltage outputs for different pixels of the segmented dimmer as a function of receipt coordinates of light transmitted through the different pixels of the segmented dimmer to achieve the set of angle dependent transmittance levels. ### Claim 11 (depends on 1) The method of claim 1, further comprising, for each of a plurality of different angle dependent transmittance levels and different temperatures, generating a lookup table providing voltage outputs for different pixels of the segmented dimmer as a function of receipt coordinates of light transmitted through the different pixels of the segmented dimmer and temperature to achieve the set of angle dependent transmittance levels. ### Claim 12 An optical system comprising: a segmented dimmer including a plurality of pixels, the segmented dimmer exhibiting viewing angle transmittance variations for application of a same voltage to all pixels of the segmented dimmer; a voltage controller in electrical communication with the segmented dimmer and configured to provide a set of voltages to pixels of the segmented dimmer to control transmittance levels for light passing through the pixels of the segmented dimmer; one or more processors programmed with instructions that, when executed, cause the one or more processors to perform operations including: identifying a set of angle dependent transmittance levels for light passing through pixels of the segmented dimmer; determining a set of voltages to apply to pixels of the segmented dimmer, wherein determining the set of voltages includes using the set of angle dependent transmittance levels; and controlling the voltage controller to apply the set of voltages to the pixels of the segmented dimmer of the optical system. ### Claim 13 (depends on 12) The optical system of claim 12, wherein determining the set of voltages comprises determining receipt coordinates associated with the pixels of the segmented dimmer and rendering the set of voltages using one or more lookup tables based on the receipt coordinates, wherein a lookup table is associated with a corresponding angle dependent transmittance level. ### Claim 14 (depends on 13) The optical system of claim 13, wherein the receipt coordinates include one or more distance coordinates or one or more angular coordinates. ### Claim 15 (depends on 12) The optical system of claim 12, wherein the operations further include identifying a receiver position for collecting light transmitted through the segmented dimmer, wherein the receiver position corresponds to an eye position of a user of the optical system and determining the set of voltages includes using the set of angle dependent transmittance levels and the receiver position. ### Claim 16 (depends on 15) The optical system of claim 15, wherein determining the set of voltages includes: identifying angles for each pixel of the segmented dimmer based on the eye position of the user, and for each pixel, applying the angles to a lookup table associated with an angle dependent transmittance level for the pixel to determine an output voltage to apply to the pixel. ### Claim 17 (depends on 12) The optical system of claim 12, wherein a set of voltages comprises voltages for each of the pixels of the segmented dimmer. ### Claim 18 (depends on 12) The optical system of claim 12, wherein identifying the set of angle dependent transmittance levels comprises identifying a bias level, offset level, or normalization factor for reducing dichoptic luminance errors or for pairing the set of angle dependent transmittance levels to transmittance levels associated with a different segmented dimmer of a different optical system. ### Claim 19 (depends on 12) The optical system of claim 12, wherein the operations further include determining a temperature of the segmented dimmer, wherein determining the set of voltages includes using the set of angle dependent transmittance levels and the temperature. ### Claim 20 (depends on 19) The optical system of claim 19, wherein determining the set of voltages comprises determining receipt coordinates associated with the pixels of the segmented dimmer and rendering the set of voltages using one or more lookup tables based on the receipt coordinates, wherein a lookup table is associated with a corresponding angle dependent transmittance level at the temperature.