# US 2024/0205384 A1 · Dynamic parallel monocular projection

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- Number: US 2024/0205384 A1
- Document ID: US20240205384A1
- Status: Published application
- Kind: A1
- Application number: 18/591,880
- Filed: 2024-02-29
- Published: 2024-06-20
- Earliest claimed: 2021-08-31
- Assignees: Spectralics Ltd.
- Applicants: Spectralics Ltd.
- Inventors: Yuval KASHTER; Eran FALEK; Ran BAR-YOSEF
- Web page: https://patentgrep.com/patent/US20240205384A1

## CPC

- G02B 27/0093: {with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking}
- H04N 13/383: for tracking with gaze detection, i.e. detecting the lines of sight of the viewer's eyes
- H04N 13/32: using arrays of controllable light sources; using moving apertures or moving light sources
- G02B 2027/0129: {comprising devices for correcting parallax}
- G02B 2027/0134: {of stereoscopic type}
- G02B 2027/0187: {slaved to motion of at least a part of the body of the user, e.g. head, eye}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A Dynamic Parallel Monocular Projection (DPMP) system for the provision of dynamically adjusted images to a Head Motion Box (HMB) is provided herein. The DPMP may include a picture generation unit (PGU); a projection unit, further comprising a displaying unit and at least one optical modulator, a Multi-Layered Thin Combiner (MLTC), comprising an infra-red (IR) light source and an IR detection sensor, thereby enabling the provision of images adjusted to the individual location of the observer's eyes within the HMB.

## Claims

### Claim 1

A Dynamic Parallel Monocular Projection (DPMP) system for the provision of dynamically adjusted images to a Head Motion Box (HMB), the system comprising:
a picture generation unit (PGU) providing images to a projection unit, the projection unit further comprising a displaying unit and at least one optical modulator
wherein the at least one optical modulator is configured to dynamically and individually modulate images for each of two exit pupils in amplitude and phase distribution corresponding to the position of the observer's eyes located within the Head Motion Box (HMB); and
a Multi-Layered Thin Combiner (MLTC), comprising an infra-red (IR) light source and an IR detection sensor,
wherein the MLTC is configured to trace IR light from the IR light source to the HMB; and
wherein the MLTC is configured to acquire reflections of IR light from the observer's eyes using the IR detection sensor, thereby locating the position of the observer's eyes within the HMB in relation to the projection unit;
thereby enabling the provision of images adjusted to the individual location of the observer's eyes in the HMB.

### Claim 2 (depends on 1)

The DPMP system according to claim 1, wherein the images provided to the observer's eyes is parallax-free.

### Claim 3 (depends on 1)

The DPMP system according to claim 1, wherein the position of each of the observer's eyes is localized by detecting the IR light that is reflected from the retina of the observer's eyes by the IR detection sensor.

### Claim 4 (depends on 3)

The DPMP system according to claim 3, wherein a threshold is applied to the intensity distribution of the IR light detected by the IR detection sensor to only isolate the retina reflections of the observer's eyes.

### Claim 5 (depends on 1)

The DPMP system according to claim 1, wherein the observer's eyes are located within the entire region of the HMB.

### Claim 6 (depends on 1)

The DPMP system according to claim 1, wherein the two exit pupils are located in symmetrical manner relative to the optical axis of a pair of observer's eyes located in the HMB.

### Claim 7 (depends on 1)

The DPMP system according to claim 1, wherein the phase modulator is (i) an LCOS based Spatial Light Modulator (SLM) or (ii) a Digital Micromirror Device (DMD).

### Claim 8 (depends on 1)

The DPMP system according to claim 1, wherein the IR detection sensor contains Indium Gallium Arsenide alloys (InGaAs).

### Claim 9 (depends on 1)

The DPMP system according to claim 1, wherein the DPMP system is configured to be implemented in a Head Up Display (HUD).