CN211669451U - Near-to-eye display equipment - Google Patents
Near-to-eye display equipment Download PDFInfo
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- CN211669451U CN211669451U CN202020643711.1U CN202020643711U CN211669451U CN 211669451 U CN211669451 U CN 211669451U CN 202020643711 U CN202020643711 U CN 202020643711U CN 211669451 U CN211669451 U CN 211669451U
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Abstract
The embodiment of the utility model provides a relate to optical design technical field, disclose a near-to-eye display device, include: the utility model provides a near-to-eye display system can adjust waveguide piece and display device orientation on the space through first adjustable device and adjustable support to adjust the virtual image's of incidenting to the people's eye depth of field.
Description
Technical Field
The embodiment of the utility model provides a relate to optical design technical field, in particular to near-to-eye display device.
Background
Augmented reality is a technology for fusing virtual information and a real world, wherein near-eye display equipment is a key link in the augmented reality technology, and a user can see a virtual image constructed by a computer while seeing the real world through the near-eye display equipment. The binocular parallax is that the imaging of the left eye and the imaging of the right eye are different when the human eyes view the same object in a binocular mode, and is one of important physiological factors for the human eyes to judge the distance of the object, wherein the farther the observed object is, the smaller the parallax is, and the farther the object is, the larger the parallax is. The central sight line is a connecting line of an object center and a pupil center when a single object is watched through two eyes, when the starry space is looked up, the two eye center sight lines are almost parallel, the eyes feel that the starry space is at infinite distance, when the object in front of the binocular watching surface is watched through two eyes, the two eye center sight lines have a certain included angle, so that the eyes feel that the object is near in front of the eyes, the distance of the virtual image can be adjusted by adjusting the included angle of the center sight lines when the two eye virtual images are fused, and the depth of field of the virtual image.
In implementing the embodiments of the present invention, the inventor finds that there are at least the following problems in the above related art: the existing binocular near-eye display equipment usually only has one depth of field, the depth of field is fixed and cannot be adjusted, a binocular line always focuses on a plane when a human eye watches a virtual object, and the sight line needs to be continuously switched between a real scene and a virtual picture when the human eye watches far or near, so that the virtual object is difficult to be well fused with the real environment, the user experiences are reduced due to the fact that the user feels dizzy, and the use requirements of multiple scenes are difficult to meet.
SUMMERY OF THE UTILITY MODEL
To address the above-discussed deficiencies of the prior art, it is an object of embodiments of the present invention to provide a near-eye display device with adjustable depth of field.
The embodiment of the utility model provides an aim at is realized through following technical scheme:
in order to solve the above technical problem, an embodiment of the present invention provides a near-to-eye display device, including: a frame comprising two frame supports;
the two waveguide pieces are used for outputting imaging light rays to human eyes and are respectively arranged on the two mirror frame supports;
the first adjustable device is used for adjusting an included angle between the two waveguide pieces, and the two mirror frame supports are integrally installed through the first adjustable device;
the two display devices are used for outputting imaging light rays into the waveguide sheets on the corresponding mirror frame supports;
one end of the adjustable support is integrally installed with the mirror frame support, and the other end of the adjustable support is integrally installed with the display device and used for adjusting the relative angle between the display device and the waveguide sheet.
In some embodiments, a second adjustable device is disposed on the adjustable bracket for adjusting the angle between the display device and the waveguide sheet.
In some embodiments, the first adjustable device comprises a first adjustable knob, wherein the angle between the two waveguide sheets can be adjusted by rotating the adjustable knob.
In some embodiments, the second adjustable device includes a second adjustable knob and a third adjustable knob, wherein a deflection angle of the display device in a horizontal direction can be adjusted by rotating the second adjustable knob, and the deflection angle of the display device in the horizontal direction can also be adjusted by rotating the third adjustable knob.
In some embodiments, further comprising: and the eye movement tracking device is arranged on the mirror frame or the waveguide sheet and is used for tracking the rotation angle of the pupil of the human eye so as to obtain the gazing distance of the human eye.
In some embodiments, the eye tracking device comprises: the infrared ray transmitting device and the infrared ray receiving device are arranged towards human eyes.
In some embodiments, further comprising: a microcontroller connected to the display device, the first adjustable device, the second adjustable device, and the eye tracking device, respectively.
In some embodiments, the waveguide sheet is a grating waveguide or a geometric array waveguide, the light emitting surface of the display device is disposed toward the coupling-in area of the waveguide sheet, and the coupling-out area of the waveguide sheet is disposed toward the human eye.
In some embodiments, the display device includes: a micro display screen, an illumination device and/or a collimating lens group.
In some embodiments, the micro-display is one of MEMS, LCD, LED, OLED, DLP, LCOS.
Compared with the prior art, the beneficial effects of the utility model are that: be different from the prior art's condition, the embodiment of the utility model provides a near-to-eye display device is provided, include: the utility model provides a near-to-eye display system can adjust waveguide piece and display device orientation on the space through first adjustable device and adjustable support to adjust the virtual image's of incidenting to the people's eye depth of field.
Drawings
One or more embodiments are illustrated by the accompanying figures in the drawings that correspond thereto and are not to be construed as limiting the embodiments, wherein elements/modules and steps having the same reference numerals are represented by like elements/modules and steps, unless otherwise specified, and the drawings are not to scale.
Fig. 1 is a schematic diagram illustrating a calculation principle of a binocular central sight angle of a virtual image at a spatial point position according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a near-eye display device according to an embodiment of the present invention;
fig. 3 is a schematic top view of a near-eye display device according to an embodiment of the present invention;
fig. 4 is another schematic top view diagram of a near-eye display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that, if not conflicted, the various features of the embodiments of the invention can be combined with each other and are within the scope of protection of the present application. In addition, although the functional blocks are divided in the device diagram, in some cases, the blocks may be divided differently from those in the device. Further, the terms "first," "second," and the like, as used herein, do not limit the data and the execution order, but merely distinguish the same items or similar items having substantially the same functions and actions.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only. In order to facilitate the connection structure limitation, the utility model discloses use the position of near-eye display device on the space when people stands or is just sitting and is wearing the near-eye display device as the reference and carry out the position limitation of part, for example, the waveguide piece sets up in people's eye "front" side.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
The interpupillary distance is the distance between the binocular pupils of human eyes, the interpupillary distance of adults is usually 50-70mm, and for a virtual display image, the central sight line is defined as the connecting line of the image center of binocular overlapping parts and the pupil center. Please refer to fig. 1, which illustrates the principle of calculating the binocular central visual line angle of the virtual image at a spatial point position, which can be easily derived from fig. 1 and the geometric calculation theorem, wherein the calculation formula of the binocular central visual line angle is as follows:
wherein, theta represents a binocular central sight angle, L represents a pupil distance, and D represents a distance between a virtual image displayed by two eyes and two eyes.
Taking the pupil distance L as 70mm as an example, the pupil distance L can be calculated according to the above calculation formula, when the distance D is 0.5m, the binocular central line-of-sight included angle θ is 8 °, when the distance D approaches infinity, the binocular central line-of-sight included angle θ approaches 0 °, and therefore, for a user with a pupil distance of 70mm, the adjustment of the virtual image imaging position (i.e., the depth of field) from 0.5m in front of the eye to infinity can be realized by adjusting the binocular central line-of-sight included angle θ between 0 ° and 8 °.
Based on the above principle, the present application provides a near-eye display device capable of adjusting a virtual image imaging position, i.e., a depth of field, the near-eye display device including: the utility model provides a near-to-eye display system can adjust waveguide piece and display device orientation on the space through first adjustable device and adjustable support to adjust the virtual image's of incidenting to the people's eye depth of field.
Specifically, the embodiments of the present invention will be further explained with reference to the drawings.
The embodiment of the utility model provides a near-to-eye display device, please see fig. 2, it shows the utility model provides a near-to-eye display device's structure, near-to-eye display device includes: frame 10, two waveguide pieces 20, first adjustable device 30, two display devices 40, and two adjustable supports 50.
The frame 10 includes two frame supports 11, and the two frame supports 11 correspond to left and right eye positions of a person and can be used to house the waveguide piece 20. In the embodiment shown in fig. 2, the two frame supports 11, the two waveguide plates 20, the two display devices 40 and the two adjustable supports 50 are arranged in a left-right mirror symmetry manner, and the frame supports 11 only wrap one side of the waveguide plates 20. In other embodiments, the above-mentioned even number of devices and components may not be symmetrically distributed, or only one side is reserved, and the frame support 11 may not have the shape as shown in fig. 2, specifically, may be set and selected according to the actual application scenario, and need not be limited by the embodiments of the present invention.
The two waveguide sheets 20 are used for outputting imaging light to human eyes, and the two waveguide sheets 20 are respectively installed on the two frame supports 11. Please refer to fig. 3 together, which shows a top view of a near-eye display device in a working scenario, in an embodiment of the present invention, the waveguide sheet 20 is a grating optical waveguide or a geometric array optical waveguide, and the waveguide sheet 20 includes: the display device comprises an incoupling area 21, an outcoupling area 22 and a total reflection area 23, wherein the light-emitting surface of the display device 40 is arranged towards the light-in surface of the incoupling area 21, and the light-emitting surface of the outcoupling area 22 is arranged towards human eyes. The coupling-in area 21 and the coupling-out area 22 may be replaced by geometric or diffractive optical elements such as prisms, embossed gratings, holographic gratings, etc., and the coupling-in area 21 and the coupling-out area 22 may be combined with the total reflection areas 23 in various ways, such as covering the upper and lower surfaces of the total reflection areas 23 or being embedded in the total reflection areas 23.
In addition, in the embodiment shown in fig. 3, the coupling-in area 21 and the coupling-out area 22 are disposed on the surface of the total reflection area 23, and the display device 40, the coupling-in area 21 and the coupling-out area 22 are disposed on a side of the total reflection area 23 close to the human eye. In some other embodiments, the display device 40, the coupling-in region 21, and/or the coupling-out region 22 may also be disposed on one side of the total reflection region 23 away from human eyes, and it is only necessary to ensure that the imaging light emitted from the display device 40 can be incident into the total reflection region 23 through the coupling-in region 21, and the imaging light can be output to human eyes from the coupling-out region 22.
The first adjustable device 30 is used for adjusting an included angle between the two waveguide pieces 20, and the two frame supports 11 are integrally installed through the first adjustable device 30. Preferably, in the embodiment shown in fig. 2, the first adjustable device 30 comprises a first adjustable knob, wherein the angle between the two waveguide sheets can be adjusted by rotating the adjustable knob.
The two display devices 40 are used for outputting imaging light into the waveguide sheet 20 on the corresponding frame support 11. The display device 40 includes: a micro display screen, an illumination device and/or a collimating lens group. The micro display screen can be one of MEMS (micro electro mechanical system laser scanning projection), LCD (liquid crystal display), LED (light emitting diode display), OLED (organic light emitting diode display), DLP (digital light processing) and LCOS (liquid crystal on silicon), and specifically, can be selected according to the imaging requirements in the actual use scene.
One end of the adjustable bracket 50 is integrally mounted to one of the frame brackets 11, and the other end is integrally mounted to the display device 40, and the adjustable bracket 50 is used to adjust a relative angle between the display device 40 and the waveguide sheet 20. A second adjustable device is disposed on the adjustable bracket 50 for adjusting the angle between the display device and the waveguide sheet. The second adjustable device may be a rotating table, a spherical positioning device, a pan-tilt, or the like, which can enable the display device 40 to freely change to the image plane orientation on the spatial coordinate system, and may be specifically selected according to actual needs.
Preferably, in the embodiment shown in fig. 2, the second adjustable device comprises a second adjustable knob 51 and a third adjustable knob 52, wherein the deflection angle of the display device 40 in the horizontal direction can be adjusted by rotating the second adjustable knob 51, and the deflection angle of the display device 40 in the horizontal direction can also be adjusted by rotating the third adjustable knob 52.
In normal work, the embodiment of the present invention provides a near-to-eye display device having two modes of adjusting depth of field:
referring to fig. 3, in a first adjustment manner, the first adjustment device 30 is adjusted (i.e. the first adjustment knob is rotated) to change the angle between the two waveguide sheets 20, so as to adjust the binocular central viewing angle θ, thereby adjusting the depth of field of the near-eye display device, that is, the virtual image imaging position.
Referring to fig. 4, it shows a top view of the near-eye display device in a working scene, in the second adjusting mode, the alignment direction of the display device 40 is changed by adjusting the second adjustable device on the adjustable bracket 50 (i.e. rotating the second adjusting knob 51 and/or the third adjusting knob 52), so as to adjust the emergent position and direction of the imaging light, so as to change the binocular central line-of-sight angle θ, so as to adjust the depth of field of the near-eye display device, i.e. the virtual image imaging position.
Further, under the limiting condition, when the display device 40 is disposed opposite to the light incident surface of the incoupling region 21 as shown in fig. 3, and the two total reflection regions 23 are disposed on the same plane as shown in fig. 4, the light of the central view field is perpendicular to the total reflection regions 23, and the total reflection regions 23 are disposed horizontally with respect to the two eyes, at this time, the central lines of sight of the two eyes are parallel, and the virtual image is displayed at infinity.
It should be noted that, the embodiment of the present invention provides a near-to-eye display device shown in fig. 2 to fig. 4, which is an optical waveguide near-to-eye display device, in practical use, the embodiment of the present invention provides a near-to-eye display device not limited to an optical waveguide near-to-eye display device, but also can be other near-to-eye display devices such as a free-form surface and a holographic retina projection, and specifically, can be designed according to practical needs without being restricted by the embodiments of the present invention.
Further, in some embodiments, the near-eye display device further comprises: and an eye tracking device (not shown) disposed on the frame 11 or the waveguide plate 20 for tracking the rotation angle of the pupil of the human eye so as to obtain the gazing distance of the human eye. The eye tracking device comprises: the infrared ray transmitting device and the infrared ray receiving device are arranged towards human eyes. When the eye movement tracking device works, infrared rays are emitted towards the eyes, part of the emitted infrared rays enter the pupils of the human, part of the emitted infrared rays are reflected on the irises, the rotating direction of the human eyes can be determined by analyzing the reflected light, and the rotating angle change conditions of two eyeballs of the human can be determined by respectively arranging the eye movement tracking device on the left and right frame supports 11 or the two waveguide pieces 20 and aligning the eye movement tracking device with the human eyes.
In some embodiments, the near-eye display device further comprises: a microcontroller connected to the display device 40, the first adjustable device 30, the second adjustable device and the eye tracking device, respectively. The microcontroller can receive the gazing direction and distance of the human eyes fed back by the eye tracking device, and outputs control instructions and control signals after calculation to know the relative positions of the display device 40, the first adjustable device 30 and/or the second adjustable device in space so as to realize intelligent automatic adjustment. Preferably, the near-eye display device may further comprise a battery pack electrically connected to the display device 40, the first adjustable apparatus 30, the second adjustable apparatus, the eye tracking device and the microcontroller, respectively, for powering the display device 40, the first adjustable apparatus 30, the second adjustable apparatus, the eye tracking device and the microcontroller.
The embodiment of the utility model provides an in provide a near-to-eye display device, include: the utility model provides a near-to-eye display system can adjust waveguide piece and display device orientation on the space through first adjustable device and adjustable support to adjust the virtual image's of incidenting to the people's eye depth of field.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled 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 depart from the spirit and scope of the present invention.
Claims (10)
1. A near-eye display device, comprising:
a frame comprising two frame supports;
the two waveguide pieces are used for outputting imaging light rays to human eyes and are respectively arranged on the two mirror frame supports;
the first adjustable device is used for adjusting an included angle between the two waveguide pieces, and the two mirror frame supports are integrally installed through the first adjustable device;
the two display devices are used for outputting imaging light rays into the waveguide sheets on the corresponding mirror frame supports;
one end of the adjustable support is integrally installed with the mirror frame support, and the other end of the adjustable support is integrally installed with the display device and used for adjusting the relative angle between the display device and the waveguide sheet.
2. The near-eye display device of claim 1,
and a second adjustable device is arranged on the adjustable bracket and used for adjusting the angle between the display device and the waveguide sheet.
3. The near-eye display device of claim 2,
the first adjustable device comprises a first adjustable knob, wherein the included angle between the two waveguide sheets can be adjusted by rotating the adjustable knob.
4. The near-eye display device of any one of claims 2 or 3,
the second adjustable device comprises a second adjustable knob and a third adjustable knob, wherein the deflection angle of the display device in the horizontal direction can be adjusted by rotating the second adjustable knob, and the deflection angle of the display device in the horizontal direction can also be adjusted by rotating the third adjustable knob.
5. The near-eye display device of claim 4, further comprising: and the eye movement tracking device is arranged on the mirror frame or the waveguide sheet and is used for tracking the rotation angle of the pupil of the human eye so as to obtain the gazing distance of the human eye.
6. The near-eye display device of claim 5,
the eye tracking device comprises: the infrared ray transmitting device and the infrared ray receiving device are arranged towards human eyes.
7. The near-eye display device of claim 6, further comprising: a microcontroller connected to the display device, the first adjustable device, the second adjustable device, and the eye tracking device, respectively.
8. The near-eye display device of claim 7,
the waveguide sheet is a grating optical waveguide or a geometric array optical waveguide, the light-emitting surface of the display device faces the coupling-in area of the waveguide sheet, and the coupling-out area of the waveguide sheet faces human eyes.
9. The near-eye display device of claim 8,
the display device includes: a micro display screen, an illumination device and/or a collimating lens group.
10. The near-eye display device of claim 9,
the micro display screen is one of MEMS, LCD, LED, OLED, DLP and LCOS.
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| CN202020643711.1U CN211669451U (en) | 2020-04-24 | 2020-04-24 | Near-to-eye display equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111381377A (en) * | 2020-04-24 | 2020-07-07 | 深圳珑璟光电技术有限公司 | Near-to-eye display equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111381377A (en) * | 2020-04-24 | 2020-07-07 | 深圳珑璟光电技术有限公司 | Near-to-eye display equipment |
| CN111381377B (en) * | 2020-04-24 | 2023-12-08 | 深圳珑璟光电科技有限公司 | Near-to-eye display device |
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