CN216434538U - Optical module and head-mounted display device with same - Google Patents

Abstract

The utility model relates to an augmented reality technical field especially relates to an optical module and have its head-mounted display device. The utility model provides a pair of optical module, including casing, magnetic drive unit, display element and lens unit. The magnetic driving unit is arranged in the shell, the display unit is positioned in the magnetic driving unit, and the magnetic driving unit can adjust the distance between the display unit and the lens unit so as to change the diopter of the optical module. The utility model also provides a wear display device, it includes above-mentioned optical module. Compared with the prior art, the utility model has the advantages of: in this embodiment, drive the display element through setting up magnetism drive unit and remove the distance in order to adjust between display element and the lens unit for distance between display element and the lens unit can automatically regulated, thereby realized the automatically regulated of diopter, compare traditional manual regulation diopter, this application is convenient and fast more, has promoted user's use and has experienced.

Description

Optical module and head-mounted display device with same

Technical Field

The utility model relates to an augmented reality technical field especially relates to an optical module and have its head-mounted display device.

Background

The Augmented Reality (AR) is a technology that skillfully fuses virtual information and the real world, and a plurality of technical means such as multimedia, three-dimensional modeling, real-time tracking and registration, intelligent interaction, sensing and the like are widely applied, and virtual information such as characters, images, three-dimensional models, music, videos and the like generated by a computer is applied to the real world after being simulated, and the two kinds of information complement each other, so that the real world is enhanced.

In current optical module, in order to satisfy the demand of watching of myopia and hyperopia, need wear extra lens and obtain clear picture, so not only can increase user's heavy burden, cause the damage at bridge of the nose and ear position, it is convenient inadequately moreover to make the user use.

SUMMERY OF THE UTILITY MODEL

In view of this, to the above technical problem, the utility model provides an optical module convenient to use.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides an optical module, its characterized in that includes casing, magnetism drive unit, display element and lens unit, magnetism drive unit install in the casing, the display element is located in the magnetism drive unit, magnetism drive unit can adjust the display element with distance between the lens unit is in order to change optical module's diopter.

It can be understood that this application drives through setting up the magnetism drive unit the display element removes in order to adjust the display element with distance between the lens unit makes the display element with distance between the lens unit can automatically regulated to realize the automatically regulated of diopter, compared traditional manual regulation diopter, this application is convenient and fast more, has promoted user's use and has experienced.

In one embodiment, the magnetic driving unit comprises a driving member and a magnetic member, the display unit is located in the driving member, and the driving member and the magnetic member drive the display unit to move towards/away from the lens unit through the change of magnetic flux.

It can be understood that, by driving the display unit to move toward/away from the lens unit through the change of the magnetic flux between the first magnetic member and the second magnetic member, the distance between the display unit and the lens unit is automatically adjusted, and thus, the diopter is automatically adjusted.

In one embodiment, the driving member is a coil wound along a circumferential direction of the display unit, the magnetic member is a permanent magnet, the magnetic member is disposed around the driving member, and the magnetic member and the driving member interact with each other to generate a change in magnetic flux.

In one embodiment, the number of the magnetic members is 4, and 4 magnetic members are arranged around the driving member.

It can be understood that, by enclosing 4 pieces of the magnetic member around the driving member, the magnetic force applied by the magnetic member to the driving member is more uniform.

In one embodiment, the driving member and the magnetic member are coils wound in a circumferential direction of the display unit, the magnetic member is arranged around the driving member, and the magnetic member and the driving member interact with each other to generate the change of the magnetic flux.

In one embodiment, the lens unit includes lenses, and the number of the lenses is one or more.

In one embodiment, the display unit comprises a display screen, and the light emitting device of the display screen adopts an OLED or a Micro LED.

In one embodiment, the optical module further comprises a lens unit, the lens unit is arranged corresponding to the display unit and the lens unit, and both the display unit and the lens unit can approach or depart from each other relative to the direction of the lens unit.

It is understood that, by making the optical module further include the mirror unit, the mirror unit is used for adjusting the propagation direction of the image light beam transmitted through the lens unit.

In one embodiment, the lens unit comprises one or more lenses.

The utility model discloses still provide following technical scheme:

a head-mounted display device comprises an optical module.

Compared with the prior art, the utility model provides an optical module is through setting magnetic drive unit drives display element removes in order to adjust display element with distance between the lens unit makes display element with distance between the lens unit can automatically regulated to realize the automatically regulated of diopter, compare traditional manual regulation diopter, this application is convenient and fast more, has promoted user's use and has experienced.

Drawings

Fig. 1 is a schematic structural diagram of an optical module according to the present invention;

fig. 2 is an exploded schematic view of an optical module according to the present invention;

fig. 3 is a schematic cross-sectional structure diagram of an optical module according to the present invention;

fig. 4 is a schematic diagram illustrating the movement of the display unit away from the lens unit in the optical module according to the present invention;

fig. 5 is a schematic diagram illustrating the movement of the display unit close to the lens unit in the optical module according to the present invention.

The symbols in the drawings represent the following meanings:

100. an optical module; 10. a housing; 20. a magnetic drive unit; 21. a drive member; 211. a coil; 22. a magnetic member; 221. a permanent magnet; 30. a display unit; 31. a display screen; 40. a lens unit; 41. a lens; 50. a lens unit; 51. a lens.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "mounted on" 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 "disposed on" 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 "secured to" another element, it can be directly secured to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

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 herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 5, the optical module 100 is mounted in a head-mounted display device, which is worn on the head of a user to facilitate the real world to be overlapped with a computer graphic, and after the overlapping, the user can fully see the real world around the real world. In this embodiment, the head-mounted display device is an AR glasses.

When light is emitted from an object to another substance with different optical density, the propagation direction of the light is deflected, which is called refraction. The unit representing the magnitude of this refraction is diopters. Because the diopter of the eye is inaccurate, the retina cannot be accurately imaged, and the vision is defective. The myopia or hyperopia people belong to people with vision defects, and the people need to wear glasses under the general condition, and the purpose of accurate imaging of the retina is achieved by supplementing and correcting the diopter of the eyes through the lenses 51.

Therefore, in the conventional optical module, the people with eyesight defects need to wear the glasses to correct the eyesight before wearing the head-mounted display device. If wear glasses and wear display device simultaneously, can make user's head feel heavy burden increase undoubtedly, cause the damage in bridge of the nose and ear position, and extremely influence user experience and feel.

To avoid the above problems, the present invention provides an optical module 100. The optical module 100 includes a housing 10, a magnetic driving unit 20, a display unit 30, and a lens unit 40. The magnetic driving unit 20 is installed in the housing 10, the display unit 30 is located in the magnetic driving unit 20, and the magnetic driving unit 20 can adjust the distance between the display unit 30 and the lens unit 40 to change the diopter of the optical module 100.

It should be noted that, in this embodiment, the magnetic driving unit 20 is arranged to drive the display unit 30 to move so as to adjust the distance between the display unit 30 and the lens unit 40, so that the distance between the display unit 30 and the lens unit 40 can be automatically adjusted, thereby achieving the automatic adjustment of diopter.

The optical module 100 further includes an electric driving component (not shown) including the magnetic driving unit 20, and the electric driving component is used for supplying current to the magnetic driving unit 20, so that the magnetic driving unit 20 generates a magnetic field, thereby generating a force for driving the display component to move.

As shown in fig. 1 and 2, the magnetic driving unit 20 includes a driving member 21 and a magnetic member 22, and the display unit 30 is located in the driving member 21. The display unit 30 is driven to move toward/away from the lens unit 40 by the change of the magnetic flux between the driving member 21 and the magnetic member 22.

In order to better understand the principle of driving the display unit 30 to move toward/away from the lens unit 40 by the change of the magnetic flux between the driving member 21 and the magnetic member 22, a relationship between the current and the magnetic field is introduced here. Generally, an electrified conductor generates an ampere force in a magnetic field, and the magnitude of the force depends on the strength of the magnetic field and the magnitude of current; the direction of the force depends on the direction of the magnetic field and the direction of the current. The left-hand rule is utilized to judge the direction of the ampere force, namely, the thumb represents the direction of the force, the index finger represents the direction of the magnetic field, and the middle finger represents the direction of the current.

That is, in the present application, the electric driving assembly provides power to the driving member 21, that is, the electric driving assembly provides current to the driving member 21, after the electric driving assembly provides current to the driving member 21, the energized driving member 21 is equivalent to an "electromagnet", at this time, the driving member 21 generates a magnetic field, after the strength of the magnetic field and the magnitude of the current, the driving member 21 generates an ampere force, and the driving member 21 mainly pushes the display unit 30 to move by the ampere force.

In order to achieve the purpose of adjusting the moving distance and direction of the driving member 21 in real time, in a magnetic field with the driving member 21 unchanged, the driving member 21 can be controlled to drive the display unit 30 to move accurately only by controlling the magnitude and direction of the current provided by the electric driving assembly for the driving member 21, so that the distance between the display unit 30 and the lens unit 40 can be adjusted automatically, and further, the diopter of the optical module 100 can be adjusted automatically.

In one embodiment, the driving member 21 is a coil 211 wound along the circumferential direction of the display unit 30, the magnetic member 22 is a permanent magnet 221, and the magnetic member 22 is disposed around the circumferential direction of the driving member 21.

Preferably, the number of the permanent magnets 221 is 4, and the 4 permanent magnets 221 are arranged around the coil 211. Since the coil 211 is wound around the display unit 30, in order to make the magnetic force applied to the coil 211 by the permanent magnets 221 more uniform, the number of the permanent magnets 221 is set to 4, so that the coil 211 can be uniformly applied with force in four directions. Of course, in other embodiments, the number of permanent magnets 221 is not limited to 4, as long as uniform force application of the coil 211 can be achieved.

It is noted that, providing the permanent magnet 221 as a frame-like structure around the circumferential direction of the coil 211 is not convenient for the inherent property of the permanent magnet 221, and thus the processing is rarely adopted in practical applications.

In one embodiment, the driving member 21 and the magnetic member 22 are coils 211 wound in the circumferential direction of the display unit 30. The magnetic member 22 is arranged around the circumference of the driving member 21, and the magnetic member 22 and the driving member 21 interact to generate the change of magnetic flux.

Note that, when both the coil 211 wound around the display unit 30 and the coil 211 provided outside the coil 211 are energized, both the coils 211 are actually equivalent to "electromagnets" with magnetic fields. The distance and direction of movement of the display unit 30 can be precisely controlled by controlling the magnitude and direction of the current respectively supplied to the two coils 211 by the electric driving assembly, thereby realizing the automatic diopter adjustment of the optical module 100.

Preferably, the coil 211 is a voice coil motor coil 211, and the electric driving component is a motor driving chip.

Further, the display assembly includes a display screen 31. The display screen 31 is used to generate and emit an image beam carrying image information.

It should be noted that the display module is applied to a display system (not shown) in the head-mounted display device. The display system includes an external system circuit block (not shown), a video input processing circuit block (not shown), and a display screen 31. The external system circuit module can adopt different operating systems, has the HDMI image output function and simultaneously supplies power to the whole head-mounted display device. In consideration of the portability of the product, the external system circuit module is made into a split design. The video input and output circuit divides the video signal input by the HDMI into two paths for the optical systems of the left eye and the right eye to synchronously display the same content.

Optionally, the display screen 31 is a light emitting device such as a micro OLED, an LCOS, and an FLCOS.

Further, the lens unit 40 includes a lens 41. The lens 41 is used to transmit the image light beam emitted from the display screen 31 and adjust the traveling direction of the image light beam.

Alternatively, the number of lenses 41 may be one or more pieces. That is, the number of the lenses 41 may be 1, 2, 3, 4 or more, and is not limited herein.

In this embodiment, the lens 41 may be a spherical surface or an aspherical surface, and is not limited herein.

Further, the optical module 100 further includes a detection device (not shown). The sensing device is disposed between the display module and the lens unit 40, and the sensing device is used to measure a distance between the display module and the lens unit 40.

It should be noted that, since the diopters to be adjusted are different for persons with different eyesight, the distance to be adjusted between the display unit and the lens unit 40 is also different. By providing the sensing means to measure and record the distance between the display element and the lens unit 40, the value of the distance between the display element and the lens unit 40 at each different diopter can be recorded. When the same user uses, the numerical value can be directly adjusted to the recorded numerical value, so that the method is convenient and fast, and the user use experience can be improved.

Further, the optical module 100 further includes a lens unit 50. The lens unit 50 is disposed to correspond to the display assembly and the lens unit 40, and both the display assembly and the lens unit 40 may be close to or far from the lens unit 50. The mirror unit 50 is used to adjust the traveling direction of the image beam transmitted through the lens unit 40.

It should be noted that the number of the display screen 31, the lens 41 and the lens 51 can be one or more, but the number of the display screen 31, the lens 41 and the lens 51 should be the same.

As shown in fig. 3 to 5, the farthest object point imaged on the retina of a human eye is called the far point, and the far point of a normal human eye is at infinity. For eyes with spherical ametropia, the image on the display screen 31 must be made to fall at the actual distant point of the eye with abnormal vision via the HMD.

According to the method for adjusting the visual acuity of the eyepiece of the telescope, an image formed by the objective lens of the telescope falls on the object space focal plane of the eyepiece, and the position of the eyepiece needs to be moved along the optical axis in order to ensure that light passing through the eyepiece is not parallel light any more. If the myopia needs to be corrected, a divergent beam needs to be emitted out of the back of the eyepiece, and if the hyperopia needs to be corrected, a convergent beam needs to be emitted out of the back of the eyepiece.

When the image after passing through the HMD is observed with normal eyes, the display screen 31 is at the back focal plane of the HMD optical system. The image made by the HMD falls exactly on the retina. Thus moving the position of the display screen 31 changes the outgoing beam after passing through the HMD optical system.

It should be noted that, when controlling the movement of the display screen 31, it is to be ensured that the display screen 31 is at a distance from the lens 41 closest to the display screen 31, and the display screen 31 cannot be too far away from the lens 41 closest to the display screen 31, so as to avoid that the light of the marginal field of view cannot enter the HMD optical system.

The utility model provides an optical module 100's theory of operation does: the display assembly generates and emits an image beam carrying image information, the lens unit 40 transmits the image beam emitted from the display assembly and adjusts a traveling direction of the image beam, and the mirror unit 50 reflects the image beam transmitted by the lens unit 40, and finally enters the user's eye.

In this embodiment, drive display element 30 through setting up magnetic drive unit 20 and remove in order to adjust the distance between display element 30 and the lens unit 40 for the distance between display element 30 and the lens unit 40 can automatically regulated, thereby has realized the automatically regulated of diopter, compares traditional manual regulation diopter, and this application is convenient and fast more, has promoted user's use and has experienced.

The utility model also provides a wear display device (not shown), including optical module 100.

The head-mounted display device also has the advantages of the optical module 100.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. An optical module, characterized by, including casing (10), magnetism drive unit (20), display element (30) and lens unit (40), magnetism drive unit (20) install in casing (10), display element (30) are located in magnetism drive unit (20), magnetism drive unit (20) can adjust the distance between display element (30) and lens unit (40) to change optical module's diopter.

2. The optical module according to claim 1, wherein the magnetic driving unit (20) comprises a driving member (21) and a magnetic member (22), the display unit (30) is located in the driving member (21), and the driving member (21) and the magnetic member (22) drive the display unit (30) to move toward/away from the lens unit (40) through the change of magnetic flux.

3. The optical module according to claim 2, wherein the driving member (21) is a coil (211) wound in a circumferential direction of the display unit (30), the magnetic member (22) is a permanent magnet (221), the magnetic member (22) is disposed around the driving member (21), and the magnetic member (22) and the driving member (21) interact with each other to generate the change of the magnetic flux.

4. The optical module according to claim 3, wherein the number of the magnetic members (22) is 4, and 4 of the magnetic members (22) are arranged around the driving member (21).

5. The optical module according to claim 2, wherein the driving member (21) and the magnetic member (22) are each a coil (211) wound in a circumferential direction of the display unit (30), the magnetic member (22) is circumferentially arranged around the driving member (21), and the magnetic member (22) and the driving member (21) interact with each other to generate the change of the magnetic flux.

6. The optical module according to claim 2, wherein the lens unit (40) comprises lenses (41), the number of lenses (41) being one or more pieces.

7. The optical module according to claim 2, wherein the display unit (30) comprises a display screen (31), and the light emitting device of the display screen (31) is an OLED or a Micro LED.

8. The optical module according to claim 1, further comprising a lens unit (50), wherein the lens unit (50) is disposed corresponding to the display unit (30) and the lens unit (40), and wherein the display unit (30) and the lens unit (40) are both capable of moving toward or away from each other with respect to a direction of the lens unit (50).

9. Optical module according to claim 8, in which the lens unit (50) comprises a lens (51), the number of lenses (51) being one or more.

10. A head-mounted display device comprising an optical module according to any one of claims 1 to 9.

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