Eyewear display having offset bonding

Patent metadata

Field	Value
Publication number	US-11619835-B2
Application number	US-202017115244-A
Country	US
Kind code	B2
Filing date	Dec 8, 2020
Priority date	Dec 8, 2020
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

Eyewear including a multi-layered display having an adhesive bonding the layers together at an offset distance inward from an outer edge of the layers. The display has an image display layer, such as an optical waveguide in one example, and a pair of layers encompassing the image display layer and which may comprise optically transparent substrates, such as glass. A respective adhesive is positioned the offset distance inward from the outer edge of the display layer between the image display layer and each of the pair of layers to reduce stress in the display. Each of the adhesives may be a continuous bead such that there is no adhesive between the pair of layers and the image display layer at the outer edges. In one example, the offset distance may be at least double the thickness of the image display layer to reduce stress in the image display layer.

First claim

What is claimed is:

1. Eyewear, comprising:
a frame;
a temple coupled to the frame; and
a display supported by the frame, wherein the display comprises a first layer configured to generate an image, and a second layer and a third layer positioned on opposing sides of the first layer, wherein the second layer and the third layer are each attached to the first layer by a respective adhesive positioned an offset distance inward from an outer edge of the first layer, wherein the offset distance of the adhesive is at least double a thickness of the first layer.

2. The eyewear as specified in claim 1 , wherein there is no adhesive positioned between the second layer and the first layer, and between the third layer and the first layer, at the outer edge of the first layer.

3. The eyewear as specified in claim 2 , wherein the first layer is an optical waveguide.

4. The eyewear as specified in claim 2 , wherein the second layer and the third layer are each substrates.

5. The eyewear as specified in claim 4 , wherein the substrates each comprise an optically transparent glass substrate.

6. The eyewear as specified in claim 4 , further comprising an air gap between the substrates and the first layer.

7. The eyewear as specified in claim 1 , wherein the display is attached to the frame by an adhesive positioned inward from an outer edge of the second layer.

8. A display configured for use with eyewear having a frame and a temple coupled to the frame, comprising:
a first layer configured to generate an image; and

a second layer and a third layer positioned on opposing sides of the first layer, wherein the second layer and the third layer are each attached to the first layer by a respective adhesive positioned an offset distance inward from an outer edge of the first layer, wherein the offset distance of the adhesive is at least double a thickness of the first layer.

9. The display as specified in claim 8 , wherein there is no adhesive positioned between the second layer and the first layer, and between the third layer and the first layer, at the outer edge of the first layer.

10. The display as specified in claim 9 , wherein the first layer is an optical waveguide.

11. The display as specified in claim 9 , wherein the second layer and the third layer are each substrates.

12. The display as specified in claim 11 , wherein the substrates each comprise an optically transparent glass substrate.

13. The display as specified in claim 11 , further comprising an air gap between the substrates and the first layer.

14. The display as specified in claim 8 , wherein the display is attached to an eyewear frame by an adhesive positioned inward from an outer edge of the second layer.

15. A method of producing eyewear having a frame, a temple coupled to the frame, and a display comprising a first layer configured to generate an image, and a second layer and a third layer positioned on opposing sides of the first layer, comprising;
disposing a first adhesive between the first layer and the second layer, the first adhesive positioned an offset distance inward from an outer edge of the first layer;
coupling the first layer to the second layer;

disposing a second adhesive between the first layer and the third layer, the second adhesive positioned an offset distance inward from an outer edge of the first layer, wherein the offset distance of the adhesive is at least double a thickness of the first layer;
coupling the first layer to the third layer; and
coupling the display to the eyewear frame.

16. The method as specified in claim 15 , wherein there is no adhesive positioned between the second layer and the first layer, and between the third layer and the first layer, at the outer edge of the first layer.

17. The method as specified in claim 16 , wherein the first layer is an optical waveguide.

18. The method as specified in claim 17 , wherein the second layer and the third layer are each substrates.

Assignees

• Nagaraj Benamanahalli K
• Snap Inc

Inventors

• Nagaraj Benamanahalli K

Classifications

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G02B2027/0194

  with combiner of laminated type, for optical or mechanical aspects · CPC title

• G02B27/0176 Primary

  characterised by mechanical features · CPC title

• G02C11/10 Primary

  Electronic devices other than hearing aids · CPC title

• G02B27/0172

  characterised by optical features · CPC title