Optical systems for head-worn computers

Patent metadata

Field	Value
Publication number	US-11366320-B2
Application number	US-201916714546-A
Country	US
Kind code	B2
Filing date	Dec 13, 2019
Priority date	Sep 8, 2016
Publication date	Jun 21, 2022
Grant date	Jun 21, 2022

Abstract

Aspects of the present disclosure relate a head-worn computer with a see-through display wherein computer content is presented to a user wearing the head-worn computer and through which the user sees a surrounding environment, wherein the see-through display generates image light comprised of narrow bandwidths of red, green and blue light and wherein the see-through display further includes a tristimulus notch mirror positioned to reflect the image light towards the user's eye, and wherein the tristimulus notch mirror reflects less than a full width half max of the red image light.

First claim

What is claimed is:

1. A wearable device, comprising:
a light source configured to generate image light comprising a first bandwidth of light, a second bandwidth of light different from the first bandwidth of light, and a third bandwidth of light different from the first bandwidth of light and further different from the second bandwidth of light;
a see-through display configured to:
present the image light to a user the see-through display comprising a mirror configured to reflect the image light towards an eye of the user; and
transmit environmental light, wherein the image light does not comprise the environmental light,

wherein the light source comprises:
a first color source,
a second color source, and
a third color source; and
one or more filters, the one or more filters configured to:
apply a first bandpass filter to an output of the first color source to transmit the first bandwidth of light,
apply a second bandpass filter to an output of the second color source to transmit the second bandwidth of light, and
apply a third bandpass filter to an output of the third color source to transmit the third bandwidth of light.

2. The wearable device of claim 1 , wherein the mirror comprises a partial mirror configured to reflect the first bandwidth of light, the second bandwidth of light, and the third bandwidth of light.

3. The wearable device of claim 2 , wherein the partial mirror is further configured to transmit a fourth bandwidth of light, the fourth bandwidth of light different from the first bandwidth of light, the second bandwidth of light, and the third bandwidth of light.

4. The wearable device of claim 3 , wherein the partial mirror is further configured to transmit the fourth bandwidth of light away from the eye of the user.

5. The wearable device of claim 4 , wherein the output of the first color source includes the fourth bandwidth of light, and applying the first bandpass filter to the output of the first color source comprises attenuating the fourth bandwidth of light of the output of the first color source.

6. The wearable device of claim 5 , further comprising:
an upper optics module comprising the light source; and
a lower optics module comprising the mirror, wherein the light source is configured to project the image light downwards with respect to the user.

7. The wearable device of claim 5 , wherein the mirror comprises a holographic mirror.

8. The wearable device of claim 5 , wherein the mirror comprises a notch mirror.

9. The wearable device of claim 1 , wherein the first color source comprises a first LED, the second color source comprises a second LED, and the third color source comprises a third LED.

10. The wearable head device of claim 1 , wherein the see-through display is configured to shield, from the user, a portion of the image light traversing the mirror.

11. A method comprising:
generating, at a light source, image light comprising a first bandwidth of light, a second bandwidth of light different from the first bandwidth of light, and a third bandwidth of light different from the first bandwidth of light and further different from the second bandwidth of light;
applying a first bandpass filter to an output of a first color source of the light source to transmit the first bandwidth of light;
applying a second bandpass filter to an output of a second color source of the light source to transmit the second bandwidth of light; and
applying a third bandpass filter to an output of a third color source of the light source to transmit the third bandwidth of light, wherein the light source comprises the first, second, and third bandpass filters;
presenting, via a see-through display of a wearable device, the image light to a user of the wearable device, wherein presenting the image light to the user comprises reflecting the image light toward an eye of the user via a mirror of the see-through display; and
transmitting, via the see-through display, environmental light, wherein the image light does not comprise the environmental light.

12. The method of claim 11 , wherein the mirror comprises a partial mirror configured to reflect the first bandwidth of light, the second bandwidth of light, and the third bandwidth of light.

13. The method of claim 12 , wherein the partial mirror is further configured to transmit a fourth bandwidth of light, the fourth bandwidth of light different from the first bandwidth of light, the second bandwidth of light, and the third bandwidth of light.

14. The method of claim 13 , wherein the partial mirror is further configured to transmit the fourth bandwidth of light away from the eye of the user.

15. The method of claim 14 , wherein the output of the first color source includes the fourth bandwidth of light, and applying the first bandpass filter to the output of the first color source comprises attenuating the fourth bandwidth of light of the output of the first color source.

16. The method of claim 15 , wherein the wearable device comprises:
an upper optics module comprising the light source; and
a lower optics module comprising the mirror, and wherein the light source is configured to project the image light downwards with respect to the user.

17. The method of claim 15 , wherein the mirror comprises a holographic mirror.

18. The method of claim 15 , wherein the mirror comprises a notch mirror.

19. The method of claim 11 , wherein the first color source comprises a first LED, the second color source comprises a second LED, and the third color source comprises a third LED.

20. The method of claim 11 , further comprising shielding, from the user, a portion of the image light traversing the mirror.

Assignees

• Mentor Acquisition One Llc

Inventors

• Nortrup Edward H
• Border John N
• Haddick John D

Classifications

• G02B2027/0112

  comprising device for genereting colour display · CPC title

• G02B27/0093

  with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking · CPC title

• G02B5/04

  Prisms · CPC title

• G02B27/0172 Primary

  characterised by optical features · CPC title

• G02B2027/0138

  comprising image capture systems, e.g. camera · CPC title