Head wearable display device

Patent metadata

Field	Value
Publication number	US-10325560-B1
Application number	US-201715816186-A
Country	US
Kind code	B1
Filing date	Nov 17, 2017
Priority date	Nov 17, 2017
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

A head wearable display device, a method, and a system. The head wearable display device may include a visor portion implemented as a pupil-expanding waveguide, a processor, an image illumination source communicatively coupled to the processor and configured to output optical signals, an optical pathway, and column injectors implemented in and along the optical pathway. Each of the column injectors may be associated with a pixel column. Each of the column injectors may be configured to be in a pass-through state or a deflect state. When a given column injector is in the pass-through state, the given column injector may allow optical signals to pass through the given column injector. When a particular column injector is in the deflect state, the particular column injector may be configured to deflect the optical signals into the visor portion causing a column of pixels to display in the visor portion.

First claim

What is claimed is:

1. A head wearable display device, comprising:
at least one visor portion implemented as a pupil-expanding waveguide;
a processor configured to receive image data and output collimated image illumination data;
an image illumination source communicatively coupled to the processor, the image illumination source configured to:
receive the collimated image illumination data; and
output optical signals based on the collimated image illumination data;

an optical pathway configured to receive the optical signals, wherein the optical signals pass through the optical pathway; and
a plurality of column injectors implemented in and along the optical pathway, each of the plurality of column injectors associated with a pixel column, each of the plurality of column injectors configured to be in a pass-through state or a deflect state, wherein when a given column injector is in the pass-through state the given column injector allows the optical signals to pass through the given column injector, wherein when a particular column injector is in the deflect state the particular column injector is configured to deflect the optical signals into the at least one visor portion causing a column of pixels to display in the at least one visor portion,
wherein, at a given time, the processor is further configured to cause a first column injector of the plurality of column injectors to be in a deflect state while causing intervening column injectors positioned between the first column injector and the collimating optics to be in pass through states such that the optical signals pass through the intervening column injectors in the pass through states to the first column injector in the deflect state and such that the optical signals are deflected into the at least one visor portion by the first column injector.

2. The head wearable display device of claim 1 , further comprising:
collimating optics optically coupled to the image illumination source, the collimating optics configured to:
receive the optical signals from the image illumination source;
collimate the optical signals; and
output the optical signals to the optical pathway as collimated optical signals.

3. The head wearable display device of claim 1 , wherein, when the particular column injector is in the deflect state, the particular column injector is further configured to collimate the optical signals as the particular column injector deflects the optical signals into the at least one visor portion causing the column of pixels to display in the at least one visor portion.

4. The head wearable display device of claim 1 , wherein the processor is further configured to cause each of the plurality of column injectors to be in a pass-through state or a deflect state.

5. The head wearable display device of claim 1 , wherein, at a second given time, the processor is further configured to cause a second column injector of the plurality of column injectors to be in a deflect state while causing second intervening column injectors positioned between the second column injector and the collimating optics to be in pass through states such that the optical signals pass through the second intervening column injectors in the pass through states to the second column injector in the deflect state and such that the optical signals are deflected into the at least one visor portion by the second column injector.

6. The head wearable display device of claim 1 , wherein the head wearable display device is configured to iteratively cause different columns of pixels to display in the at least one visor portion such that a human wearing the head wearable display device perceives a displayed image.

7. The head wearable display device of claim 1 , wherein the image illumination source comprises light emitting diode (LED) elements.

8. The head wearable display device of claim 1 , wherein the image illumination source comprises a laser device.

9. The head wearable display device of claim 1 , wherein the collimating optics comprises a microlens array.

10. The head wearable display device of claim 1 , wherein each of the plurality of column injectors comprises a digital mirror device (DMD).

11. The head wearable display device of claim 1 , wherein the at least one visor portion includes diffraction gratings.

12. The head wearable display device of claim 1 , wherein the at least one visor portion includes stepped beam splitter mirrors.

13. The head wearable display device of claim 1 , wherein the at least one visor portion is at least partially transparent.

14. The head wearable display device of claim 1 , wherein the at least one visor portion is implemented as a panoramic visor.

15. The head wearable display device of claim 1 , wherein the optical pathway is implemented along a top or bottom portion of the at least one visor portion.

16. The head wearable display device of claim 1 , wherein the head wearable display device does not obscure a brow area visual field of view of a wearer of the head wearable display device.

17. The head wearable display device of claim 1 , wherein the head wearable display device is a helmet.

18. A system, comprising:
a computing device comprising at least one processor and memory, the computing device configured to output image data; and
a head wearable display device communicatively coupled to the computing device, the head wearable display device comprising:
at least one visor portion implemented as a pupil-expanding waveguide;
a processor configured to receive the image data and output collimated image illumination data;
an image illumination source communicatively coupled to the processor, the image illumination source configured to:
receive the collimated image illumination data; and
output optical signals based on the collimated image illumination data;

an optical pathway configured to receive the optical signals, wherein the optical signals pass through the optical pathway; and
a plurality of column injectors implemented in and along the optical pathway, each of the plurality of column injectors associated with a pixel column, each of the plurality of column injectors configured to be in a pass-through state or a deflect state, wherein when a given column injector is in the pass-through state the given column injector allows the optical signals to pass through the given column injector, wherein when a particular column injector is in the deflect state the particular column injector is configured to deflect the optical signals into the at least one visor portion causing a column of pixels to display in the at least one visor portion,
wherein, at a given time, the processor is further configured to cause a first column injector of the plurality of column injectors to be in a deflect state while causing intervening column injectors positioned between the first column injector and the collimating optics to be in pass through states such that the optical signals pass through the intervening column injectors in the pass through states to the first column injector in the deflect state and such that the optical signals are deflected into the at least one visor portion by the first column injector.

19. A method for operating a head wearable display device including at least one visor portion implemented as a pupil-expanding waveguide, a processor, an image illumination source, an optical pathway, and a plurality of column injectors, the image illumination source communicatively coupled to the processor, the plurality of column injectors implemented in and along the

Assignees

• Rockwell Collins Inc

Inventors

• Tiana Carlo L
• Stratton Eric P

Classifications

• G02B2027/014

  comprising information/image processing systems · CPC title

• G02B2027/0125

  Field-of-view increase by wavefront division · CPC title

• G09G3/342

  using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines · CPC title

• G02B27/0172 Primary

  characterised by optical features · CPC title

• G09G3/32

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title