# US 12,007,566 B2 · Head-mounted display apparatus and optical display system

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- Number: US 12,007,566 B2
- Document ID: US12007566B2
- Status: Granted
- Kind: B2
- Application number: 17/265,457
- Filed: 2020-08-05
- Published: 2022-09-22
- Granted: 2024-06-11
- Earliest claimed: 2019-08-05
- Assignees: University of Central Florida Research Foundation, Inc.; Goertek Inc.
- Applicants: University of Central Florida Research Foundation, Inc.; Goertek Inc.
- Inventors: Tao Zhan; Junyu Zou; Shin-Tson Wu; Sheng Liu; Jilin Yang
- Web page: https://patentgrep.com/patent/US12007566B2

## CPC

- G02B 27/0101: {characterised by optical features (G02B27/0172 takes precedence)}
- G02B 27/0172: {characterised by optical features}
- G02B 5/3016: {involving passive liquid crystal elements (optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528)}
- G02B 5/3025: {Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state (G02B5/3008, G02B5/3016 take precedence)}
- G02B 27/286: {for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another (G02B5/3083 takes precedence; light guide coupling means utilising polarising elements G02B6/34)}
- G02B 27/0037: {with diffracting elements (G02B27/0056 takes precedence; holographic optical elements G02B5/32; zone systems G02B5/1876)}
- G02B 2027/0107: {with optical power}
- G02B 2027/0116: {comprising devices for correcting chromatic aberration}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A head-mounted display apparatus and an optical display system are disclosed. The head-mounted display apparatus comprises: a display assembly, which outputs light of an image, a lens assembly, placed in front of the display assembly to enlarge the image and produce the first aberration of a first direction; and a planar optical assembly, placed between the display assembly and the lens assembly, wherein the planar optical assembly produces the second aberration of a second direction opposite to the first direction to correct the first aberration.

## Claims

### Claim 1

A head-mounted display apparatus, comprising:
a display assembly, adapted to output light of an image;
a lens assembly, positioned in front of the display assembly and adapted to enlarge the image and produce a first aberration of a first direction; and
a planar optical assembly, positioned between the display assembly and the lens assembly,
wherein the planar optical assembly is adapted to produce a second aberration of a second direction opposite to the first direction to correct the first aberration,
wherein the display assembly comprises: a display component; and a first circular polarizer, adapted to convert light from the display component into circular polarized light,
wherein the planar optical assembly includes: polarization-dependent planar optics adapted to receive one or more of a right-handed or left-handed circular polarized light and convert at least a portion thereof into oppositely circular polarized light and leak any remaining light; and a polarization blocker, adapted to block the leaked light, and
wherein the polarization blocker is a second circular polarizer, and the second circular polarizer blocks the leaked light with original handedness and passes the opposite handedness light.

### Claim 2 (depends on 1)

The head-mounted display apparatus according to claim 1, wherein the display is further adapted to output circular polarized light.

### Claim 3 (depends on 1)

The head-mounted display apparatus according to claim 1 wherein the polarization-dependent planar optics functions by a Pancharatnam-Berry phase.

### Claim 4 (depends on 1)

The head-mounted display apparatus according to claim 1, wherein the polarization-dependent planar optics includes a liquid crystal diffractive film.

### Claim 5 (depends on 4)

The head-mounted display apparatus according to claim 4, wherein the polarization-dependent planar optics further includes two transparent substrates, and the liquid crystal diffractive film is positioned between the two substrates.

### Claim 6 (depends on 1)

The head-mounted display apparatus according to claim 1, the polarization-dependent planar optics is made liquid crystal polymer.

### Claim 7

An optical display system, comprising:
a first circular polarizer, adapted to converts light of an image from a display component into a circular polarized light;
a planar optical assembly, a lens assembly, adapted to enlarges the image and produces a first aberration of a first direction; and
wherein the planar optical assembly is adapted to produce a second aberration of a second direction opposite to the first direction to correct the first aberration,
the planar optical assembly includes: polarization-dependent planar optics, the polarization-dependent planar optics adapted to receive one or more of a right-handed or left-handed circular polarized light and convert at least a portion thereof into oppositely circular polarized light and leak any remaining light and a polarization blocker, adapted to block the leaked light, and
wherein the polarization blocker is a second circular polarizer, and the second circular polarizer blocks the leaked light with original handedness and passes the opposite handedness light.