CN114252998A - Near-to-eye display device - Google Patents
Near-to-eye display device Download PDFInfo
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- CN114252998A CN114252998A CN202210196804.8A CN202210196804A CN114252998A CN 114252998 A CN114252998 A CN 114252998A CN 202210196804 A CN202210196804 A CN 202210196804A CN 114252998 A CN114252998 A CN 114252998A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0112—Head-up displays characterised by optical features comprising device for genereting colour display
- G02B2027/0114—Head-up displays characterised by optical features comprising device for genereting colour display comprising dichroic elements
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Abstract
The application provides a near-to-eye display device. The near-eye display device comprises a display assembly, an optical assembly, an infrared array light source and an infrared photosensitive assembly. The display assembly and the infrared array light source reach the glasses of the user after being processed by the optical assembly. The design utilizes the optical assembly to process the array infrared light to form infrared light in different directions to cover human eyes, and compared with the prior art that infrared light sources are arranged at different positions of a near-eye display device to form infrared light in different directions, the design reduces the structural volume.
Description
Technical Field
The application belongs to the technical field of optical display, and particularly relates to a near-to-eye display device.
Background
In recent years, with the development of microdisplays, advanced optics and software and hardware technologies, near-to-eye display products are more varied, and the near-to-eye display products are also more widely applied to the fields of entertainment, virtual reality and the like. With the development and wide application of the near-eye display technology, more possibilities are realized in the application field of the eye movement tracking technology. For example, eye tracking technology can be used instead of keyboards, mice and touch screens to enable human-computer interaction in near-eye display technology. Eye tracking techniques may also be utilized to analyze elements from images or videos captured by a scene camera to determine the orientation of the user's head and the speed of movement of the user's head. By analyzing the relative positions of elements in successive images or videos, adjustments to the gaze direction calculations can be made to compensate for motion. In addition, the identification and password protection can be realized by using the eye tracking technology.
Among the current technical scheme, need set up infrared light source on near-to-eye display device's different positions, lead to overall structure volume grow.
Disclosure of Invention
The embodiment of the application provides a near-to-eye display device to solve the problem that the overall structure is large in size due to the fact that infrared light sources are arranged at different positions of the near-to-eye display device at present.
A first aspect of an embodiment of the present application provides a near-eye display device, including a display component, an optical component, an infrared array light source, and an infrared photosensitive component;
the image light output by the display component is processed by the optical component and then imaged to the eyes of a user;
array infrared light output by the infrared array light source is processed by the optical assembly to form infrared light in different directions, and the infrared light in different directions covers the eyes of the user;
the infrared light reflected by the human eyes is acquired by the infrared photosensitive assembly.
In one embodiment, the display assembly comprises a passive light-emitting image source, an illumination light source and a polarizer, and the optical assembly comprises a polarization splitting prism, a lens group and an optical coupling device;
the illumination light source emits illumination light which is emitted out of the polarizer and then is incident to the passive light-emitting image source after being reflected by the polarization beam splitter prism to form the image light, and the image light is transmitted by the polarization beam splitter prism again and then is imaged to eyes of a user after sequentially passing through the lens group and the optical coupling device;
the array infrared light is reflected by the polarization beam splitter prism and then sequentially passes through the lens group and the optical coupling device to form infrared light in different directions.
In one embodiment, the infrared photosensitive assembly is arranged on a non-optical working surface of the optical coupling device, and infrared light reflected by human eyes is directly acquired by the infrared photosensitive assembly.
In one embodiment, the number of the infrared photosensitive assemblies is multiple.
In one embodiment, a plurality of infrared photosensitive assemblies are arranged on the non-optical working surface of the optical coupling device at equal intervals.
In one embodiment, the display assembly includes an active light-emitting image source, the optical assembly includes a light-splitting element, a lens group, and an optical coupling device;
the image light output by the active light-emitting image source is transmitted by the light splitting element and then sequentially passes through the lens group and the optical coupling device to be imaged to the eyes of a user;
the array infrared light is reflected by the light splitting element and then sequentially passes through the lens group and the optical coupling device to form the infrared light in different directions.
In one embodiment, the infrared photosensitive assembly is arranged on a non-optical working surface of the optical coupling device, and infrared light reflected by human eyes is directly acquired by the infrared photosensitive assembly.
In one embodiment, the number of the infrared photosensitive assemblies is multiple.
In one embodiment, a plurality of infrared photosensitive assemblies are arranged on the non-optical working surface of the optical coupling device at equal intervals.
In one embodiment, infrared light reflected by human eyes is acquired by the infrared photosensitive assembly after passing through the optical coupling device, the lens group and the light splitting element again.
The near-eye display device comprises a display assembly, an optical assembly, an infrared array light source and an infrared photosensitive assembly. The display assembly and the infrared array light source reach the glasses of the user after being processed by the optical assembly. The design utilizes the optical assembly to process the array infrared light to form infrared light in different directions to cover human eyes, and compared with the prior art that infrared light sources are arranged at different positions of a near-eye display device to form infrared light in different directions, the design reduces the structural volume.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a near-eye display device according to an embodiment of the present disclosure;
fig. 2 is a schematic view illustrating another structure of a near-eye display device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a near-eye display device according to another embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a near-eye display device according to another embodiment of the present disclosure.
Description of the main drawing elements
10. A display component; 11. a passive light emitting image source; 12. an illumination light source; 13. a polarizer; 14. an active light emitting image source; 20. an optical component; 21. a polarization splitting prism; 22. a lens group; 23. an optical coupling device; 231. an optical working surface; 232. a non-optical working surface; 24. a light-splitting element; 30. an infrared array light source; 40. and the infrared photosensitive assembly.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application and the drawings described above, are intended to cover non-exclusive inclusions. For example, a process, method, or system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first" and "second," etc. are used to distinguish between different objects and are not used to describe a particular order.
In application, the near-eye display device may be configured as a wearable device or a portable device according to actual needs, for example, the near-eye display device may be configured as a head-mounted near-eye display device such as AR or VR glasses, an AR or VR helmet, or the like.
Eye tracking, also known as gaze tracking, is a technique for estimating the gaze and/or point of regard of an eye by measuring eye movement. The sight line may be understood as a three-dimensional vector, and the gaze point may be understood as a two-dimensional coordinate of the three-dimensional vector projected on a certain plane. Currently widely used are optical recording methods: the method comprises the steps of recording the eye movement condition of a testee by using a camera or a video camera, namely acquiring an eye image reflecting the eye movement, and extracting eye features from the acquired eye image for establishing a model for estimating a sight line/a fixation point. Wherein the eye features may include: pupil location, pupil shape, iris location, iris shape, eyelid location, canthus location, spot (also known as purkinje spot) location, and the like. Among optical recording methods, the most popular eye tracking method at present is called pupil-cornea reflex method, and the principle of the method is as follows: the light source is irradiated to the eye, the reflection point formed on the cornea by the light source is called a light spot (also called a purkinje spot), and the eye is shot by the image acquisition equipment, so that the eye image with the light spot is obtained. When the eyeballs rotate, the relative position relation between the pupil center and the light spots changes correspondingly, a plurality of eye images with the light spots collected by the image collecting equipment reflect the corresponding position change relation, and sight line/fixation point estimation can be carried out according to the position change relation.
In the prior art, a plurality of infrared light sources need to be arranged at different positions of a near-eye display device in order to realize eyeball tracking, so that the volume of the whole structure is increased. Based on this, the embodiment of the application provides a near-eye display device. The near-eye display device includes a display assembly 10, an optical assembly 20, an infrared array light source 30, and an infrared sensing assembly 40.
The image light output by the display component 10 is processed by the optical component 20 and then imaged to the eyes of the user. Array infrared light output by the infrared array light source 30 is processed by the optical assembly 20 to form infrared light in different directions, and the infrared light in different directions covers the eyes of the user. The infrared light reflected by the human eye is captured by the infrared sensing assembly 40.
It is understood that the display assembly 10 may be a passive display assembly 10. The display assembly 10 may also be an active display assembly 10. The specific structure of the optical assembly 20 is not particularly limited as long as it has the ability to process the image light and the infrared array light, so that the image light is imaged on the glasses of the user, and the array infrared light is arranged into infrared light in different directions.
The infrared array light source 30 is a device that emits infrared light. The infrared array light source 30 includes a plurality of infrared point light sources. And the infrared point light sources are arranged in a dot matrix manner and are used for outputting array infrared light in different directions. The plurality of infrared point light sources may be infrared LED light sources, infrared LD light sources, or the like.
The infrared sensor 40 may be a Charge-coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). Of course, the infrared photosensitive assembly 40 may also be a photosensitive device including a photosensitive member. The infrared light sensing assembly 40 may be a light sensing chip.
In this embodiment, the display module 10 and the infrared array light source 30 are processed by the optical module 20 and then reach the glasses of the user. The design uses the optical assembly 20 to process the array infrared light to form infrared light in different directions to cover human eyes, and compared with the prior art which uses infrared light sources arranged at different positions of a near-eye display device to form infrared light in different directions, the design reduces the structural volume.
Referring to FIG. 1, in one embodiment, the display assembly 10 includes a passive light-emitting image source 11, an illumination source 12, and a polarizer 13. The optical assembly 20 includes a polarization splitting prism 21, a lens group 22, and an optical coupling device 23.
The illumination light source 12 emits illumination light which passes through the polarizer 13 and then emits polarized illumination light, the polarized illumination light is reflected by the polarization beam splitter prism 21 and then enters the passive light-emitting image source 11 to form the image light, and the image light is transmitted by the polarization beam splitter prism 21 again and then sequentially passes through the lens group 22 and the optical coupling device 23 to be imaged to the eyes of a user.
The array infrared light is reflected by the polarization beam splitter prism 21 and then sequentially passes through the lens group 22 and the optical coupling device 23 to form infrared light in different directions.
The passive light-emitting image source 11 may be a Liquid Crystal Display (LCD), a Liquid Crystal On Silicon (LCOS), a Digital Light Processing (DLP) Display, or other types or forms of micro displays that cannot emit light by itself, and the embodiments of the present application are not limited herein. In addition, the passive light-emitting image source 11 may be a flexible screen or a rigid screen (i.e., a non-flexible screen).
The polarization splitting prism 21 may be a P-type polarization splitting prism 21 for transmitting P-type polarized light and shielding (or absorbing) S-type polarized light. The polarization splitting prism 21 may also be an S-type polarization splitting prism 21 for transmitting S-type polarized light and shielding (or absorbing) P-type polarized light.
It is to be understood that the structure of the lens group 22 is not particularly limited as long as image light can be imaged to infinity. The structure of the optical coupling device 23 is not particularly limited as long as it can image light to the user's eye and cover the array infrared light to the user's eye. Alternatively, the optical coupling device 23 may be an arrayed waveguide, a volume hologram waveguide, a diffraction waveguide, a prism, a free-form surface, or the like.
In this embodiment, the infrared array light source 30 is disposed near one light receiving surface of the polarization splitting prism 21, so that the array infrared light output by the infrared array light source 30 is received by the polarization splitting prism 21 and reflected to the lens group 22. Compared with the prior art in which the infrared light source is arranged near the optical coupling device 23, the design does not block the field of view of projection imaging and the field of view of the preset external environment.
Referring to fig. 2, in one embodiment, the infrared photosensitive assembly 40 is disposed on the non-optical working surface 232 of the optical coupling device 23, and the infrared light reflected by the human eye is directly captured by the infrared photosensitive assembly 40.
The optical coupling device 23 includes an optical working surface 231 and a non-optical working surface 232. The optical working surface 231 of the optical coupling device 23 refers to an optical surface through which the image light and the infrared array light pass during imaging to the user's eye. The non-optical working surface 232 of the optical coupling device 23 refers to an optical surface through which the image light and the infrared array light do not pass during imaging to the user's eye. For example, the near-eye display device is AR glasses, the optical coupling device 23 is an arrayed waveguide lens, and the non-optical working surface 232 of the optical coupling device 23 is an edge surface of the arrayed waveguide lens contacting with the frame. The infrared photosensitive assembly 40 is disposed on the non-optical working surface 232 of the optical coupling device 23, so that the shielding of the projection imaging field and the preset external environment field can be reduced.
Optionally, the number of the infrared photosensitive assemblies 40 is multiple. The plurality of infrared photosensitive assemblies 40 are disposed on the non-optical working surface 232 of the optical coupling device 23, so that infrared lights reflected by human eyes in different directions can be acquired, and the infrared lights reflected by the human eyes at different positions can be acquired by the infrared photosensitive assemblies 40 as much as possible, so as to facilitate eyeball tracking, iris identification and identity verification. In one embodiment, a plurality of the infrared sensing assemblies 40 are disposed at equal intervals on the non-optical working surface 232 of the optical coupling device 23.
Referring to fig. 3, in one embodiment, the display assembly 10 includes an active light-emitting image source 14, and the optical assembly 20 includes a beam splitting element 24, a lens group 22, and an optical coupling device 23.
The image light output by the active light-emitting image source 14 is transmitted by the light splitting element 24 and then sequentially passes through the lens group 22 and the optical coupling device 23 to be imaged to the eyes of the user.
The array infrared light is reflected by the light splitting element 24 and then sequentially passes through the lens group 22 and the optical coupling device 23 to form the infrared light in different directions.
The structures of the lens group 22 and the optical coupling device 23 in this embodiment are similar to or the same as the structures of the lens group 22 and the optical coupling device 23 shown in fig. 1, and are not described herein again.
The active Light-Emitting image source 14 may be a Light-Emitting Diode (LED) display, an Organic Light-Emitting Diode (OLED) display, or other types or forms of micro displays that emit Light by itself, and the embodiments of the present application are not limited thereto. Alternatively, the active light-emitting image source 14 may be a flexible screen or a rigid screen (i.e., a non-flexible screen).
The light splitting element 24 may be a non-polarizing light splitting element 24 or a polarizing light splitting element 24 as long as image light and array infrared light can be transmitted to the lens group 22 and the optical coupling device 23.
In this embodiment, the infrared array light source 30 is disposed near one light receiving surface of the light splitting element 24, so that the array infrared light output by the infrared array light source 30 is received by the light splitting element 24 and reflected to the lens assembly 22. Compared with the prior art in which the infrared light source is arranged near the optical coupling device 23, the design does not block the field of view of projection imaging and the field of view of the preset external environment.
Referring to fig. 3, in one embodiment, the infrared photosensitive assembly 40 is disposed on the non-optical working surface 232 of the optical coupling device 23, and the infrared light reflected by the human eye is directly captured by the infrared photosensitive assembly 40.
The non-optical working surface 232 of the optical coupling device 23 refers to an optical surface through which the image light and the infrared array light do not pass during imaging to the user's eye. For example, the near-eye display device is AR glasses, the optical coupling device 23 is an arrayed waveguide lens, and the non-optical working surface 232 of the optical coupling device 23 is an edge surface of the arrayed waveguide lens contacting with the frame. The infrared photosensitive assembly 40 is disposed on the non-optical working surface 232 of the optical coupling device 23, so that the shielding of the projection imaging field and the preset external environment field can be reduced.
Optionally, the number of the infrared photosensitive assemblies 40 is multiple. The plurality of infrared photosensitive assemblies 40 are disposed on the non-optical working surface 232 of the optical coupling device 23, so that infrared lights reflected by human eyes in different directions can be acquired, and the infrared lights reflected by the human eyes at different positions can be acquired by the infrared photosensitive assemblies 40 as much as possible, so as to facilitate eyeball tracking, iris identification and identity verification. In one embodiment, a plurality of the infrared sensing assemblies 40 are disposed at equal intervals on the non-optical working surface 232 of the optical coupling device 23.
Referring to fig. 4, in one embodiment, the infrared light reflected by the human eye passes through the optical coupling device 23, the lens assembly 22, and the light splitting element 24 again, and then is acquired by the infrared photosensitive assembly 40.
In this embodiment, the active light-emitting image source 14, the infrared array light source 30, and the infrared sensor assembly 40 are all disposed near the different light-receiving surfaces of the light-splitting element 24. Compared with the prior art in which the infrared light source and the infrared photosensitive assembly 40 are arranged near the optical coupling device 23, the design does not block the field of view of the projection imaging and the preset field of view of the external environment.
In applications, the near-eye display device may include, but is not limited to, the components described above. Those skilled in the art will appreciate that the illustration of fig. 1 is merely an example of a near-eye display device and does not constitute a limitation of a near-eye display device and may include more or fewer components than those shown, or some components may be combined, or different components, such as an eyepiece lens, a geometric array optical waveguide sheet, a diffractive optical waveguide sheet, or the like.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A near-eye display device is characterized by comprising a display component, an optical component, an infrared array light source and an infrared photosensitive component;
the image light output by the display component is processed by the optical component and then imaged to the eyes of a user;
array infrared light output by the infrared array light source is processed by the optical assembly to form infrared light in different directions, and the infrared light in different directions covers the eyes of the user;
the infrared light reflected by the human eyes is acquired by the infrared photosensitive assembly.
2. The near-eye display device of claim 1 wherein the display assembly comprises a passive light-emitting image source, an illumination light source, and a polarizer, the optical assembly comprises a polarizing beam splitter prism, a lens set, and an optical coupling device;
the illumination light source emits illumination light which is emitted out of the polarizer and then is incident to the passive light-emitting image source after being reflected by the polarization beam splitter prism to form the image light, and the image light is transmitted by the polarization beam splitter prism again and then is imaged to eyes of a user after sequentially passing through the lens group and the optical coupling device;
the array infrared light is reflected by the polarization beam splitter prism and then sequentially passes through the lens group and the optical coupling device to form infrared light in different directions.
3. The near-eye display device of claim 2, wherein the infrared photosensitive assembly is disposed on a non-optical working surface of the optical coupling device, and infrared light reflected by the human eye is directly captured by the infrared photosensitive assembly.
4. The near-eye display device of claim 3, wherein the number of infrared sensitive components is plural.
5. The near-eye display device of claim 4, wherein a plurality of the infrared sensitive components are disposed at equal intervals on the non-optical working surface of the optical coupling device.
6. The near-eye display device of claim 1, wherein the display assembly comprises an active light-emitting image source, the optical assembly comprises a light-splitting element, a lens assembly, and an optical coupling device;
the image light output by the active light-emitting image source is transmitted by the light splitting element and then sequentially passes through the lens group and the optical coupling device to be imaged to the eyes of a user;
the array infrared light is reflected by the light splitting element and then sequentially passes through the lens group and the optical coupling device to form the infrared light in different directions.
7. The near-eye display device of claim 6, wherein the infrared photosensitive assembly is disposed on a non-optical working surface of the optical coupling device, and infrared light reflected by the human eye is directly captured by the infrared photosensitive assembly.
8. The near-eye display device of claim 7, wherein the number of infrared sensitive components is plural.
9. The near-eye display device of claim 8, wherein a plurality of the infrared sensitive components are disposed at equal intervals on the non-optical working surface of the optical coupling device.
10. The near-eye display device of claim 6, wherein infrared light reflected by the human eye is acquired by the infrared photosensitive assembly after passing through the optical coupling device, the lens assembly and the light splitting element again.
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| CN202210196804.8A CN114252998B (en) | 2022-03-02 | 2022-03-02 | Near-to-eye display device |
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| US20210267450A1 (en) * | 2020-02-28 | 2021-09-02 | Facebook Technologies, Llc | Eye-tracking fundus imaging system |
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