# US 2025/0208705 A1 · Light field device, pixel rendering method therefor, and adjusted vision perception system and method using same

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- Number: US 2025/0208705 A1
- Document ID: US20250208705A1
- Status: Published application
- Kind: A1
- Application number: 19/075,441
- Filed: 2025-03-10
- Published: 2025-06-26
- Earliest claimed: 2018-10-22
- Assignees: Evolution Optiks Limited
- Applicants: Evolution Optiks Limited
- Inventors: Guillaume LUSSIER; Raul MIHALI; Yaiza GARCIA; Matej GOC; Daniel GOTSCH
- Web page: https://patentgrep.com/patent/US20250208705A1

## CPC

- G02B 27/0075: {with means for altering, e.g. increasing, the depth of field or depth of focus}
- G06F 3/013: {Eye tracking input arrangements (G06F3/015 takes precedence)}
- A61B 3/032: Devices for presenting test symbols or characters, e.g. test chart projectors (A61B3/036 takes precedence)
- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- G02B 27/0093: {with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking}
- G02B 30/27: involving lenticular arrays
- G02B 30/30: involving parallax barriers
- G02B 30/50: the image being built up from image elements distributed over a three-dimensional [3D] volume, e.g. voxels
- G06F 3/0481: based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
- G06F 3/04845: for image manipulation, e.g. dragging, rotation, expansion or change of colour
- G06F 3/0487: using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06T 3/40: Scaling of whole images or parts thereof, e.g. expanding or contracting
- G06T 15/06: Ray-tracing
- G06V 40/19: Sensors therefor
- G09G 3/001: {using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background (slide projectors per se G03B23/00 = 42 HP)}
- H04N 13/307: using fly-eye lenses, e.g. arrangements of circular lenses
- H04N 13/366: using viewer tracking
- H04N 23/957: Light-field or plenoptic cameras or camera modules
- G02B 2027/0116: {comprising devices for correcting chromatic aberration}
- G02B 2027/0118: {comprising devices for improving the contrast of the display / brillance control visibility}
- G02B 2027/0134: {of stereoscopic type}
- G02B 2027/0138: {comprising image capture systems, e.g. camera}
- G02B 2027/014: {comprising information/image processing systems}
- G09G 3/04: for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments {using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions}
- G09G 2354/00: Aspects of interface with display user
- G09G 2380/08: Biomedical applications
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- 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)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

Described are various embodiments of a device to subjectively assess a user's reduced visual acuity. In one embodiment, the device includes: a digital display; a lenslet array disposed relative to the digital display to shape a light field emanating therefrom; and a hardware processor. The hardware processor operates on pixel data for respective optotypes to output respectively adjusted pixel data to be rendered side-by-side by the digital display via the lenslet array so to respectively adjust user perception of the respective optotypes as rendered therethrough to thereby render, side-by-side, distinctly perceptively adjusted optotypes corresponding to respective visual corrections to subjectively assess the user's reduced visual acuity.

## Claims

### Claim 1

A device to subjectively assess a user's reduced visual acuity, the device comprising:
a digital light field display configured to controllably shape a light field emanating therefrom; and
a hardware processor configured to operate on light field data to output respectively adjusted optotypes so to respectively adjust the user's side-by-side perception thereof, wherein said side-by-side, distinctly perceptively adjusted optotypes correspond to respective visual corrections to subjectively assess the user's reduced visual acuity.

### Claim 2 (depends on 1)

The device of claim 1, further comprising an adjustable refractive optical system disposed relative to said light field display so to set a selectable common refractive correction and thus further refract and thus redirect said light field, wherein each of said respective visual corrections is further defined as a function of said selectable common refractive correction.

### Claim 3 (depends on 2)

The device of claim 2, wherein said selectable common refractive correction is selectable to define a common coarse refractive correction for each of said respective optotypes, whereas said respectively adjusted pixel data further refines said respective visual corrections.

### Claim 4 (depends on 2)

The device of claim 2, wherein said adjustable refractive optical system comprises a tunable lens.

### Claim 5 (depends on 1)

The device of claim 1, wherein said respectively adjusted optotypes comprise identical optotypes that are distinctly perceptively adjusted for subjective comparison.

### Claim 6 (depends on 1)

The device of claim 1, wherein said respectively adjusted optotypes digitally maps each one thereof to a corresponding virtual image plane virtually positioned relative to said light field display at respectively corresponding perceived image depths.

### Claim 7 (depends on 1)

The device of claim 1, wherein said respectively adjusted optotypes digitally maps each one thereof to a retinal plane in accordance with said respective visual corrections based on respective eye focus parameters.

### Claim 8 (depends on 1)

The device of claim 1, wherein said distinctly perceptively adjusted optotypes are rendered side-by-side in respective quadrants.

### Claim 9 (depends on 1)

The device of claim 1, wherein said distinctly perceptively adjusted optotypes are rendered side-by-side in a 2-dimentions1 grid.

### Claim 10 (depends on 1)

The device of claim 1, wherein said respective visual corrections are dynamically variable so to subjectively assess the user's reduced visual acuity.

### Claim 11 (depends on 1)

The device of claim 1, wherein said respective visual corrections comprise respective cylindrical powers.

### Claim 12 (depends on 1)

The device of claim 1, wherein said respective visual corrections comprise respective spherical powers.