# US 2021/0341995 A1 · Systems and methods for interfacing with head worn display systems

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- Number: US 2021/0341995 A1
- Document ID: US20210341995A1
- Status: Published application
- Kind: A1
- Application number: 17/375,903
- Filed: 2021-07-14
- Published: 2021-11-04
- Earliest claimed: 2019-07-12
- Assignees: Rockwell Collins, Inc.
- Applicants: Rockwell Collins, Inc.
- Inventors: Robert B. Wood; Eric P. Stratton; Kenneth A. Zimmerman; Gary J. Albert; Robert D. Brown; Bruce Hufnagel
- Web page: https://patentgrep.com/patent/US20210341995A1

## CPC

- G06F 3/012: {Head tracking input arrangements}
- G06F 3/147: using display panels
- B64D 10/00: Flight suits
- B64D 47/08: Arrangements of cameras
- G02B 27/0093: {with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking}
- G02B 27/017: {Head mounted}
- G02B 27/0172: {characterised by optical features}
- G02B 27/0179: {Display position adjusting means not related to the information to be displayed}
- G06F 3/0304: {Detection arrangements using opto-electronic means (constructional details of pointing devices not related to the detection arrangement using opto-electronic means G06F3/033; optical digitisers G06F3/042)}
- G06F 3/0325: {using a plurality of light emitters or reflectors or a plurality of detectors forming a reference frame from which to derive the orientation of the object, e.g. by triangulation or on the basis of reference deformation in the picked up image}
- G09G 3/003: {to produce spatial visual effects}
- G09G 3/2096: {Details of the interface to the display terminal specific for a flat panel (suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167)}
- G02B 2027/0138: {comprising image capture systems, e.g. camera}
- G02B 2027/014: {comprising information/image processing systems}
- G02B 2027/0187: {slaved to motion of at least a part of the body of the user, e.g. head, eye}
- G09G 2354/00: Aspects of interface with display user
- G09G 2370/16: Use of wireless transmission of display information
- G09G 2370/18: Use of optical transmission of display information
- G09G 2380/12: Avionics applications
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- 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)

## Abstract

A display system includes an interface unit, a head worn display in wireless communication with the interface unit, and a first tracker sensor remote from a head of a user and configured to wirelessly sense a head pose and provide first head tracking data to the interface unit. The interface unit is remote from the head worn display. The display system also includes a second tracker sensor associated with the head of the user and configured to provide second head tracking data associated with the head pose to the head worn display. The interface unit is configured to receive the second head tracking data from the head worn display via at least one wireless link and provide video information for display on the head worn display via the at least one wireless link.

## Claims

### Claim 1

A head worn display, comprising:
a communication interface having a light transmitter and a light receiver;
an eye tracking system configured to determine the orientation of the eyes of a user, wherein the communication interface transmits eye orientation data via the light transmitter;
a projector configured to project an image associated with video data received by the light receiver based at least in part on eye orientation data;
an ambient light sensor for sensing ambient light for adjusting at least one of brightness or contrast for ambient light conditions; and
a combiner configured to display the image, wherein the light transmitter is provided with a backlight assembly associated with the projector.

### Claim 2 (depends on 1)

The head worn display, of claim 1, wherein light transmitter comprises at least one visible light emitting diode configured to provide backlighting for the projector.

### Claim 3 (depends on 1)

The head worn display, of claim 1, wherein the light transmitter comprises at least one visible light emitting diode.

### Claim 4 (depends on 1)

The head worn display of claim 1, wherein the eye tracking system is a head tracker for determining head pose and configured to generate head tracking data.

### Claim 5 (depends on 1)

The head worn display of claim 1, wherein said communication interface further comprises at least a first and second display input and the combiner is configured to combine inputs to generate imagery representing an actual view, a synthetic view, or a combination view.

### Claim 6 (depends on 4)

The head worn display, of claim 4, wherein the head tracking data is communicated through the combiner.

### Claim 7 (depends on 1)

The head worn display of claim 1, wherein the interface unit includes a camera configured to provide an outside view.

### Claim 8 (depends on 7)

The head worn display of claim 7, wherein the interface unit camera is configured to provide head tracking data.

### Claim 9 (depends on 8)

The head worn display of claim 8, wherein the head tracking data provides redundant head pose data.

### Claim 10 (depends on 1)

The head worn display of claim 1, wherein the interface unit includes a power conditioning and distribution circuit.

### Claim 11 (depends on 1)

The head worn display of claim 1, wherein the receiver is coupled to a transmitter and receiver.

### Claim 12 (depends on 11)

The head worn display of claim 11, wherein the interface unit is a self-clocking and self-synchronizing data bus.

### Claim 13 (depends on 11)

The head worn display of claim 11, wherein the interface unit is a demultiplexer interface.

### Claim 14 (depends on 1)

The head worn display of claim 1, further comprises a processor, a left eye image source driver including an LED driver, an LED, an image source, illumination optics, collimation optics, a waveguide, a combiner, and a variable transmission filter.

### Claim 15 (depends on 14)

The head worn display of claim 14, further comprises a right eye image source driver including an LED driver, an LED, an image source, illumination optics, collimation optics, a waveguide, a combiner, and a variable transmission filter.

### Claim 16 (depends on 15)

The head worn display of claim 15, wherein the image sources are at least one of a display selected from the group including a digital light processors (DLPs), a liquid crystal displays, or a organic light emitting diodes (OLED) panel.

### Claim 17 (depends on 1)

The head worn display of claim 1, further comprising a battery.

### Claim 18 (depends on 17)

The head worn display of claim 17, further comprising an inductive battery charger for charging said battery.

### Claim 19 (depends on 17)

The head worn display of claim 17, wherein the battery charger includes at least one of a light charging panel or detector for providing charging in response to LiFi signals or ambient light including infrared or ultraviolet light from the interface unit.

### Claim 20 (depends on 1)

The head worn display of claim 1, wherein the combiner is at least one selected from the group including wave guide combiners, holographic combiners, half-silvered mirrors, or reflective combiners and the combiners are selected from the group including at least one of a single combiner or a single near eye combiner for viewing with both eyes.