# US 11,442,243 B2 · Head mounted display device

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- Number: US 11,442,243 B2
- Document ID: US11442243B2
- Status: Granted
- Kind: B2
- Application number: 16/920,766
- Filed: 2020-07-06
- Published: 2021-05-13
- Granted: 2022-09-13
- Earliest claimed: 2019-11-07
- Assignees: HTC Corporation
- Applicants: HTC Corporation
- Inventors: Yen-Fang Cheng; Iok Kan Choi; Qing-Long Deng
- Web page: https://patentgrep.com/patent/US11442243B2

## CPC

- G02B 7/182: for mirrors
- G02B 27/0172: {characterised by optical features}
- G02B 5/09: Multifaceted or polygonal mirrors {, e.g. polygonal scanning mirrors; Fresnel mirrors}
- G02B 27/0093: {with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking}
- G06F 3/013: {Eye tracking input arrangements (G06F3/015 takes precedence)}
- G02B 30/10: using integral imaging methods
- G02B 2027/0138: {comprising image capture systems, e.g. camera}
- G02B 2027/014: {comprising information/image processing systems}
- G02B 2027/015: {involving arrangement aiming to get less bulky devices}
- G02B 2027/0161: {characterised by the relative positioning of the constitutive elements}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

The head mounted display device includes a tube, a reflecting mirror, an infrared camera, and an imaging lens. The reflecting mirror is arranged in the tube. The reflecting mirror has a first plane and a second plane connected in sequence, wherein the first plane and the second plane have normal vectors that are not parallel to each other. The infrared camera receives the reflected image beam from the second plane of the reflecting mirror, wherein the second plane of the reflecting mirror receives the image beam to generate the reflected image beam. The imaging lens is arranged at the first open end of the tube.

## Claims

### Claim 1

A head mounted display device, comprising:
a tube;
a reflecting mirror, disposed in the tube, having a first plane a second plane and a third plane connected in sequence, wherein the first plane and the second plane respectively have normal vectors that are not parallel to each other, and a normal vector of the third plane is not parallel with the normal vector of the second plane;
an infrared camera that receives a reflected image beam from the second plane of the reflecting mirror,
wherein the second plane of the reflecting mirror receives an image beam to generate the reflected image beam, and an included angle between the image beam and the reflected image beam is larger than 90 degrees; and
an imaging lens arranged at a first open end of the tube.

### Claim 2 (depends on 1)

The head mounted display device according to claim 1, wherein the normal vector of the third plane and the normal vector of the first plane are parallel to each other.

### Claim 3 (depends on 1)

The head mounted display device according to claim 1, wherein an angle between the first plane and the second plane is smaller than or equal to 160 degrees.

### Claim 4 (depends on 1)

The head mounted display device according to claim 1, wherein the reflecting mirror is a flexible reflecting mirror.

### Claim 5 (depends on 1)

The head mounted display device according to claim 1, wherein a thickness of the reflecting mirror is smaller than 0.2 mm.

### Claim 6 (depends on 1)

The head mounted display device according to claim 1, wherein when a thickness of the reflecting mirror is 0.07 mm, a refractive index of the reflecting mirror is smaller than or equal to 2.

### Claim 7 (depends on 1)

The head mounted display device according to claim 1, further comprising:
a display disposed at a second open end of the tube, wherein the first open end is opposite to the second open end.