CN-122018155-A - Additional lens and near-to-eye display system

Abstract

The application provides an additional lens and a near-eye display system, which relate to the technical field of near-eye display, wherein the additional lens is used for receiving light transmitted by a waveguide plate in a glasses body, and reflecting the received portion of the light to the human eye, the waveguide sheet being adapted to transmit the diffracted light to the human eye and the additional lens. According to the application, the additional lens is arranged on the light leakage side of the coupling-out area of the waveguide sheet, the additional lens is used for receiving the light transmitted by the waveguide sheet in the glasses body and reflecting part of the received light to human eyes, so that more light is effectively utilized, the energy loss caused by light leakage is reduced, the display effect of an image is improved, the visual experience of a user is enhanced, and in addition, the possibility that a bystander sees the display content of the image is reduced by reflecting the light leakage through the additional lens, thereby improving the privacy and the safety of information.

Inventors

• ZHOU ZIJI
• LIN YINYUE

Assignees

• 华勤技术股份有限公司

Dates

Publication Date

20260512

Application Date

20241108

Claims (11)

1. 1. An add lens for receiving light transmitted by a waveguide in a body of an eyeglass and reflecting a portion of the received light to a human eye, wherein the waveguide is for transmitting diffracted light to the human eye and the add lens.
2. 2. The add lens of claim 1, wherein the add lens comprises an optical film for selectively reflecting received light to reflect a portion of the received light to a human eye.
3. 3. The add-on lens of claim 2, wherein the optical film is formed from a metal coating and a dielectric coating.
4. 4. A supplemental lens according to claim 3, wherein the dielectric coating has at least one layer.
5. 5. A supplemental lens according to claim 3, wherein the material comprising the metal plating layer comprises at least one of silver, aluminum, gold, copper, nickel and chromium; And/or the material composing the dielectric coating layer comprises at least one of titanium oxide, silicon oxide, tantalum oxide, aluminum oxide, niobium oxide, zinc oxide and magnesium oxide.
6. 6. A supplemental lens according to any of claims 3 to 5, further comprising a film carrier of the optical film, the film carrier, the metal coating and the dielectric coating being layered from bottom to top.
7. 7. The add-on lens of claim 6, wherein the material comprising the film carrier comprises at least one of lightweight and thin glass, resin, polycarbonate, and acrylic.
8. 8. The add-on lens of claim 6 wherein the areas of the film carrier, the metal coating and the dielectric coating are uniform.
9. 9. The add-on lens of claim 6, wherein the film carrier and the dielectric coating are of uniform area and the metal coating is of a smaller area than the film carrier, the metal coating being divided into a plurality of sub-areas.
10. 10. A near-eye display system comprising a glasses body and an additional lens according to any one of claims 1 to 9, the additional lens being connected to the outside of the glasses body, wherein a waveguide and a light engine are provided in the glasses body; The light engine is used for generating an image and transmitting the image to the waveguide sheet in a light form; the waveguide sheet is used for transmitting diffracted light to human eyes and the additional lens; The additional lens is used for reflecting part of received light rays to human eyes.
11. 11. The near-eye display system of claim 10, wherein the connection of the eyeglass body to the additional lens comprises at least one of a magnetic attraction, an adhesive, a snap, a screw, a sliding groove, a clamp, a suction cup, and a clasp.

Description

Additional lens and near-to-eye display system Technical Field The application relates to the technical field of near-eye display, in particular to an additional lens and a near-eye display system. Background Augmented reality (Augmented Reality, AR for short) is a technology that ingeniously merges virtual information with the real world. Through augmented reality technology, a user can experience superimposed virtual information in a real environment, thereby providing a sensory experience beyond reality. The augmented reality glasses are used as important carriers of the augmented reality technology, can directly project virtual images into the field of view of a wearer, and realize seamless combination of virtual and reality. In order to achieve weight reduction and portability, diffractive optical waveguide technology is considered to be one of the ideal solutions for augmented reality eyeglass design. The diffractive optical waveguide technology utilizes the diffractive properties of gratings to efficiently transmit an image generated by an optical engine to the human eye. Specifically, the image generated by the light engine enters the waveguide sheet in the form of light rays through diffraction, and diffracts again in the coupling-out area of the waveguide sheet, so that the light rays are projected to human eyes, and information transmission and image display are realized. However, in the coupling-out region, the image diffracts toward both sides of the waveguide sheet, so that light is transmitted from the other side of the waveguide sheet away from the human eye, and this light is called light leakage. Light leakage may not only cause the content displayed by the augmented reality glasses to be seen by bystanders, but also affect the display effect of the image due to energy loss. In the related art, in order to reduce the influence of light leakage, an absorption element or a filter is generally disposed on the light leakage side of the coupling-out region of the waveguide sheet to absorb or filter the light leakage, so that the risk of information leakage is reduced to a certain extent. There is a problem in that the image display effect is not good due to the energy loss. Disclosure of Invention The application provides an additional lens and a near-eye display system, which are used for solving the problem of poor image display effect caused by energy loss in the related art. In a first aspect, the present application provides an additional lens for receiving light transmitted by a waveguide in a glasses body and reflecting a portion of the received light to a human eye, wherein the waveguide is used for transmitting diffracted light to the human eye and the additional lens. In one possible embodiment, the additional optic includes an optical film for selectively reflecting the received light to reflect a portion of the received light to the human eye. In one possible embodiment, the optical film is formed from a metal coating and a dielectric coating. In one possible embodiment, the number of dielectric coating layers is at least one. In one possible embodiment, the material comprising the metal plating layer comprises at least one of silver, aluminum, gold, copper, nickel, and chromium, and/or the material comprising the dielectric plating layer comprises at least one of titanium oxide, silicon oxide, tantalum oxide, aluminum oxide, niobium oxide, zinc oxide, and magnesium oxide. In one possible embodiment, the additional lens further comprises a film carrier for the optical film, the film carrier, the metal coating and the dielectric coating being layered from bottom to top. In one possible embodiment, the material constituting the film carrier includes at least one of light and thin glass, resin, polycarbonate, and acrylic. In one possible embodiment, the areas of the film carrier, the metal coating and the dielectric coating are uniform. In one possible embodiment, the area of the film carrier and the area of the dielectric coating coincide, the area of the metal coating is smaller than the area of the film carrier, and the metal coating is divided into a plurality of sub-areas. In a second aspect, the present application provides a near-eye display system, comprising a glasses body and an additional lens according to any one of the first aspect, the additional lens being connected to the outside of the glasses body, wherein a waveguide and a light engine are provided in the glasses body; The optical engine is used for generating an image and transmitting the image to the waveguide sheet in a light form; the waveguide sheet is used for transmitting the diffracted light to the human eye and the additional lens; an additional lens for reflecting a portion of the received light to the human eye. In one possible embodiment, the connection mode of the glasses body and the additional lens includes at least one of magnetic attraction, adhesion, clamping, screws, sliding grooves, clamping, suck