HEAD-MOUNTED DISPLAY WITH FILTER FUNCTION

• US 20160320621A1
• Filed: 12/22/2014
• Published: 11/03/2016
• Est. Priority Date: 12/23/2013
• Status: Abandoned Application

• Current Assignee: Essilor International SA
• Original Assignee: Essilor International SA
• Inventors: Zhang, Xiaohong, Zheng, Haipeng, Callier, Benoit, Biteau, John, Barrau, Coralie
• Application Number:
  US15/106,107
• Publication Number:
  US 20160320621A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 2027/011 comprising device for correcting geometrical aberrations, distortion
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 2027/0196 having transparent supporting structure for display mounting, e.g. to a window or a windshield
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 27/283 used for beam splitting or combining
• CPC Class Codes: G02B 5/22 Absorbing filters G02B5/201 - G02B5/208 take precedence
• CPC Class Codes: G02B 5/223 containing organic substances, e.g. dyes, inks or pigments
• CPC Class Codes: G02B 5/283 designed for the ultraviolet
• CPC Class Codes: G02B 5/285 comprising deposited thin solid films G02B5/281 - G02B5/289 take precedence; multilayered film filters for fibre optic multiplexing G02B6/29361
• CPC Class Codes: G02C 11/10 Electronic devices other than hearing aids
• CPC Class Codes: G02C 7/104 having spectral characteristics for purposes other than sun-protection
• CPC Class Codes: G02C 7/108 Colouring materials

Abstract

The invention provides a head-mounted display (1) comprising: —an optical module (2) containing an image source (21); —an imager (3) for guiding light emitted by the image source (21) to a wearer'"'"'s eye (E) in operation; and —a light filter for filtering a portion of light emitted by the image source (21). The invention also provides an ophthalmic lens (4) intended to be mounted onto a head-mounted display (1) comprising an image source (21), wherein said ophthalmic lens (4) comprises a light filter intended to filter light emitted by the image source (21) of the head-mounted display (1) in operation.

Claims

1. A head-mounted display comprising:

an optical module containing an image source;

an imager for guiding light emitted by the image source to a wearer'"'"'s eye in operation; and

a light filter for filtering a portion of light emitted by the image source.

2. The head-mounted display of claim 1, wherein the light filter filters wavelengths emitted by the image source within a range of 280 nm to 610 nm.

3. The head-mounted display of claim 1, wherein the imager contains a light guide and at least one of a polarising beam splitter between the image source and the light guide, an extraction surface on a portion of the light guide facing the wearer'"'"'s eye in operation and an insulation layer on the light guide, and wherein the light filter is applied on at least one of the image source, the light guide, the polarising beam splitter, the extraction surface, and the insulation layer.

4. The head-mounted display of claim 1, further comprising an ophthalmic lens with a front face, a rear face, the ophthalmic lens comprising the imager, and wherein the light filter is applied on the front face or the rear face of the ophthalmic lens.

5. The head-mounted display of claim 1, comprising an ophthalmic lens with an image insertion area linked to the image source, and wherein the light filter is applied on image insertion area.

6. The head-mounted display of claim 1, wherein the light filter comprises an interferential filter selected from among at least a Bragg mirror based filter, a multilayer dielectric filter, a holographic filter, and a Rugate filter.

9. The head-mounted display of claim 1, wherein the light filter comprises at least one absorptive filter including at least one of a dye and pigment absorbing wavelengths within a range of 380 nm to 500 nm, and transmitting at least 85% of wavelengths from 500 nm to 780 nm.

14. The ophthalmic lens of claim 19, further comprising an imager for guiding light emitted by the image source to a wearer'"'"'s eye in operation.

15. The head-mounted display of claim 2, wherein the imager contains a light guide and at least one of a polarising beam splitter between the image source and the light guide, an extraction surface on a portion of the light guide facing the wearer'"'"'s eye in operation and an insulation layer on the light guide, and wherein the light filter is applied on at least one of the image source, the light guide, the polarising beam splitter, the extraction surface, and the insulation layer.

16. The head-mounted display of claim 3, further comprising an ophthalmic lens with a front face, a rear face, the ophthalmic lens comprising the imager, and wherein the light filter is applied on the front face or the rear face of the ophthalmic lens.

17. The head-mounted display of claim 15, comprising an ophthalmic lens with an image insertion area linked to the image source, and wherein the light filter is applied on image insertion area.

18. The head-mounted display of claim 5, comprising an ophthalmic lens with an image insertion area linked to the image source, and wherein the light filter is applied on image insertion area.

19. The head-mounted display of claim 18, wherein the light filter comprises at least one absorptive filter including at least one of a dye and pigment absorbing wavelengths within a range of 380 nm to 500 nm, and transmitting at least 85% of wavelengths from 500 nm to 780 nm.

13. An ophthalmic lens intended to be mounted onto a head-mounted display comprising an image source, wherein said ophthalmic lens comprises a light filter intended to filter light emitted by the image source of the head-mounted display in operation.

7. The head-mounted display of claim 10, wherein the interferential filter further comprises a photonic bandgap material.

8. The head-mounted display of claim 10, wherein the interferential filter is one of a Bragg mirror based filter, a multilayer dielectric filter and a Rugate filter and comprises a multilayer dielectric stack of alternating layers of one material having high refractive index of 1.9 to 2.6, and one material having low refractive index of 1.2 to 1.8, each layer being 5 nm to 420 nm, and a total thickness of the multilayer dielectric stack being 1150 nm to 5770 nm.

10. The head-mounted display of claim 13, wherein the absorptive filter is applied on at least one functional layer, the functional layer being selected from an impact-resistant/adhesion primer layer, an abrasion-resistant/scratch-resistant layer, an antireflective layer, an antistatic layer, an anti-soiling layer, an antifogging layer, a self-healing polarisation layer, a tint layer, a photochromic, and combinations thereof.

11. The head-mounted display of claim 13, wherein the at least one of the dye and the pigment includes at least one component chosen from the group consisting of:

Auramine O;

Coumarin 6;

Coumarin 343;

Coumarin 314;

Nitrobenzoxadiazole;

Lucifer yellow CH;

Perylene;

9,10 Bis(phenylethynyl)anthracene (BPEA);

Proflavin;

4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran;

2-[4-(Dimethylamino)styryl]-1-methypyridinium iodide;

Resorufin methyl ether;

Acridine;

Lutein;

Zeaxanthin; and

mixtures thereof.

12. The head-mounted display of claim 13, comprising an ophthalmic lens, wherein the absorptive filter comprises at least one of a dye and a pigment dispersed in at least one of a thermoplastic or thermoset polymer material, an ophthalmic lens bulk material, and an adhesive material.

20. The head-mounted display of claim 10, comprising an ophthalmic lens, wherein the absorptive filter comprises at least one of a dye and a pigment dispersed in at least one of a thermoplastic or thermoset polymer material, an ophthalmic lens bulk material, and an adhesive material.