CN111316152A

CN111316152A - Head-mounted electronic equipment

Info

Publication number: CN111316152A
Application number: CN201780095803.1A
Authority: CN
Inventors: 何芳
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd
Priority date: 2017-11-30
Filing date: 2017-11-30
Publication date: 2020-06-19
Also published as: WO2019104658A1

Abstract

A head-mounted electronic device (10) comprises an eyepiece (100) and a display screen (200), and the head-mounted electronic device sequentially comprises a first lens (102), a second lens (104) and a third lens (106) along the direction from the image side to the object side of the eyepiece (100). At least one of the first lens (102), the second lens (104) and the third lens (106) can move back and forth along the optical axis (107) of the eyepiece (100) to realize zooming of the eyepiece (100), and the display screen (200) is arranged on the object side of the third lens (106).

Description

Head-mounted electronic equipment

Technical Field

The invention relates to the technical field of Virtual Reality (VR), in particular to a head-mounted electronic device.

Background

In the related art, the field angle of a VR (Virtual Reality) lens is fixed, and the size of a Virtual screen is generally changed by software, but changing the size of the Virtual screen by software comes at the expense of image pixels, which causes a deficiency in user experience, and the adjustable range that can be achieved by changing the size of the Virtual screen by software is small.

Disclosure of Invention

The embodiment of the invention provides a head-mounted electronic device.

The head-mounted electronic device comprises an eyepiece and a display screen, wherein the head-mounted electronic device sequentially comprises a first lens, a second lens and a third lens along the direction from the image side to the object side of the eyepiece, at least one of the first lens, the second lens and the third lens can move back and forth along the optical axis of the eyepiece to realize the zooming of the eyepiece, and the display screen is arranged at the object side of the third lens.

According to the head-mounted electronic equipment provided by the embodiment of the invention, the zoom of the eyepiece is realized through the movement of the lens, so that the size of the image displayed by the display screen is adjusted, the purpose of adjusting the size of the virtual screen can be achieved without sacrificing pixels of the display screen, the user experience is good, and the adjustment range of the size of the virtual screen is relatively large.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a head-mounted electronic device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an eyepiece of a head-mounted electronic device according to an embodiment of the present invention when an angle of view is 70 °;

FIG. 3 is a graph of an optical transfer function for an eyepiece of a head mounted electronic device of an embodiment of the present invention at a field angle of 70;

fig. 4 is a curvature of field diagram of an eyepiece of a head-mounted electronic device of an embodiment of the invention at a field angle of 70 °;

fig. 5 is a distortion diagram of an eyepiece of the head mounted electronic apparatus of the embodiment of the present invention at a field angle of 70 °;

fig. 6 is a schematic structural diagram of an eyepiece of a head-mounted electronic device according to an embodiment of the present invention when an angle of view is 80 °;

FIG. 7 is a graph of the optical transfer function of the eyepiece of the head mounted electronic device of an embodiment of the present invention at an angle of view of 80;

fig. 8 is a curvature of field diagram of an eyepiece of a head-mounted electronic device of an embodiment of the invention at an angle of view of 80 °;

fig. 9 is a distortion diagram of an eyepiece of the head mounted electronic apparatus of the embodiment of the present invention at a field angle of 80 °;

fig. 10 is a schematic structural diagram of an eyepiece of a head-mounted electronic device according to an embodiment of the present invention when an angle of view is 90 °;

FIG. 11 is a graph of the optical transfer function of the eyepiece of the head mounted electronic device of an embodiment of the present invention at a 90 ° field angle;

fig. 12 is a curvature of field diagram of an eyepiece of a head mounted electronic device of an embodiment of the invention at a 90 ° field angle;

fig. 13 is a distortion diagram of the eyepiece of the head mounted electronic apparatus according to the embodiment of the present invention when the angle of view is 90 °.

Description of the drawings with the main elements symbols:

the head-mounted electronic device 10, the eyepiece 100, the display screen 200, the first lens 102, the second lens 104, the third lens 106, the optical axis 107, the first motor 108, the first transmission member 110, the second motor 112, the second transmission member 114, the first rotor 116, the first screw 118, the second rotor 120, the second screw 122, the lens barrel 124, the second lens frame 126, the first elastic member 128, the first protrusion 130, the second lens fixing frame 132, the first guide groove 134, the first connecting rod 136, the third lens frame 138, the second elastic member 140, the second protrusion 142, the third lens fixing frame 144, the second guide groove 146, and the second connecting rod 148.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, a head-mounted electronic device 10 according to an embodiment of the present invention includes an eyepiece 100 and a display 200. The eyepiece lens 100 includes a first lens 102, a second lens 104, and a third lens 106 in this order in a direction from the image side to the object side. At least one of first lens 102, second lens 104, and third lens 106 is movable back and forth along optical axis 107 of eyepiece 100 to achieve zoom of eyepiece 100. The display screen 200 is disposed on the object side of the third lens 106.

According to the head-mounted electronic device 10 of the embodiment of the invention, the zoom of the eyepiece 100 is realized through the movement of the lens, and then the size of the image displayed by the display screen 200 is adjusted, so that the purpose of adjusting the size of the virtual screen can be achieved without sacrificing the pixels of the display screen 200, the user experience is good, and the adjustment range of the size of the virtual screen is relatively large.

It is understood that in the embodiment of the present invention, changing the on-axis interval of first lens 102 and second lens 104 and the on-axis interval of second lens 104 and third lens 106 by moving the lenses achieves zooming of eyepiece 100, thereby changing the angle of field of eyepiece 100. In this manner, when the size of the virtual screen is adjusted to adjust the size of the image displayed by the display screen 200, the pixels of the display screen 200 do not need to be sacrificed. Meanwhile, since the range in which the angle of view of the eyepiece 100 is changeable is large, the adjustment range of the virtual screen size is also relatively large.

In some embodiments, the display screen 200 is packaged with the third lens 106. When third lens 106 is moved along optical axis 107 of eyepiece 100, display screen 200 moves in synchronization with third lens 106.

In some embodiments, eyepiece 100 includes a drive mechanism. The driving mechanism is connected with at least one of the first lens 102, the second lens 104 and the third lens 106 and is used for driving at least one of the first lens 102, the second lens 104 and the third lens 106 to move.

Therefore, the automation of lens movement can be realized, and the user experience is improved.

It is to be understood that the drive mechanism drives at least one of the first lens 102, the second lens 104, and the third lens 106 to move to change the on-axis spacing of the first lens 102 from the second lens 104 and the on-axis spacing of the second lens 104 from the third lens 106. In one embodiment of the present invention, the driving mechanism may drive the second lens 104 and/or the third lens 106 to move. That is, the driving mechanism may drive only the second lens 104 to move or the third lens 106 to move; the driving mechanism may also drive the second lens 104 and the third lens 106 to move simultaneously. When the second lens 104 and the third lens 106 are driven to move simultaneously, the second lens 104 and the third lens 106 may be driven to move synchronously, or the second lens 104 and the third lens 106 may be driven to move asynchronously.

In some embodiments, the drive mechanism includes a first motor 108, a first transmission 110, a second motor 112, and a second transmission 114. First motor 108 is coupled to second lens 104 via first transmission 110 and drives second lens 104 along optical axis 107 of eyepiece 100. Second motor 112 is coupled to third lens 106 via second transmission 114 and drives third lens 106 along optical axis 107 of eyepiece 100.

It is understood that the first motor 108 is connected to the first transmission member 110, the first transmission member 110 is connected to the second lens 104, and the first motor 108 drives the second lens 104 to move along the optical axis 107 of the eyepiece 100 through the first transmission member 110. Second motor 112 is connected to second transmission member 114, second transmission member 114 is connected to third lens 106, and second motor 112 drives third lens 106 to move along optical axis 107 of eyepiece 100 through second transmission member 114. Further, controlling the number of turns of first motor 108 may control the distance second lens 104 moves along optical axis 107 of eyepiece 100; controlling the number of turns of second motor 112 controls the distance third lens 106 moves along optical axis 107 of eyepiece 100.

In some embodiments, the first transmission member 110 includes a first rotor 116 and a first screw 118. The second transmission 114 includes a second rotor 120 and a second screw 122. First rotor 116 is in threaded connection with first screw 118, and first motor 108 is used to drive first rotor 116 to move back and forth on first screw 118 to drive second lens 104 to move along optical axis 107 of eyepiece 100. The second rotor 120 is connected to the second screw 122 in a threaded manner, and the second motor 112 is used for driving the second rotor 120 to move back and forth on the second screw 122 so as to drive the third lens 106 to move along the optical axis 107 of the eyepiece 100.

Thus, the lens is moved by means of a screw drive.

It will be appreciated that first rotor 116 is threadably engaged with first screw 118 such that first motor 108 drives first rotor 116 back and forth on first screw 118, thereby moving second lens 104 along optical axis 107 of eyepiece 100. The second rotor 120 is in threaded engagement with the second screw 122, so that the second motor 112 drives the second rotor 120 to move back and forth on the second screw 122, thereby driving the third lens 106 to move along the optical axis 107 of the eyepiece 100.

In other embodiments, the movement of the lens may be achieved by means of gears, belts, chains, or the like.

The manner of the screw drive will be described in one embodiment with reference to the accompanying drawings.

Specifically, eyepiece 100 includes a lens barrel 124 and a second lens frame 126. The first lens 102, the second lens 104, the third lens 106, the second lens frame 126, the display screen 200, and the driving mechanism are located within the lens barrel 124. The drive mechanism includes a first resilient member 128. The second lens 104 is fixed to the second lens frame 126. The outer side surface of the second lens frame 126 is provided with a first bump 130. The first elastic member 128 connects the second lens frame 126 and the lens barrel 124. When first rotor 116 moves toward the object side of eyepiece 100 on first screw 118, first bump 130 is pushed to drive second lens frame 126 and second lens 104 to move toward the object side of eyepiece 100. When the first rotor 116 moves to the image side of the eyepiece 100 on the first screw 118, the first elastic element 128 drives the second lens frame 126 to drive the second lens 104 to move to the image side of the eyepiece 100.

The first protrusion 130 is formed with a through hole for the first screw 118 to pass through, and the inner diameter of the through hole is larger than the outer diameter of the first screw 118, so that the resistance to the movement of the second lens 104 is smaller, and the movement of the second lens 104 is facilitated. When first rotor 116 moves toward the object side of eyepiece 100 on first screw 118, first rotor 116 pushes first bump 130 to drive second lens 104 to move toward the object side of eyepiece 100, and at this time, first elastic element 128 is stretched.

When the first rotator 116 moves to the image side of the eyepiece 100 on the first screw 118, the first elastic element 128 is retracted to generate a pulling force, so as to drive the second lens frame 126 to drive the second lens 104 to move to the image side of the eyepiece 100. Preferably, the first elastic member 128 is a spring.

It will be appreciated that second lens 104 may be moved by other means of other screw drives, for example, first elastic member 128 may be omitted and second lens frame 126 may be directly screwed to first screw 118 to drive second lens 104 back and forth along optical axis 107 of eyepiece 100 by forward and reverse rotation of first motor 108.

In addition, in order to facilitate mounting of the driving mechanism that drives the second lens 104, the eyepiece 100 includes a second lens fixing frame 132. The first screw 118 is coupled to the second lens holding frame 132. The lens barrel 124 is formed with a first guide groove 134, and an edge of the second lens fixing frame 132 is located in the first guide groove 134.

In this way, during mounting, the second lens structure, which is formed by mounting the second lens 104, the second lens frame 126, the first elastic member 128, the first screw 118, and the second lens fixing frame 132, can be mounted in the lens barrel 124 along the first guide groove 134. Due to the guiding of the first guiding groove 134, the installation mode is convenient and fast.

Further, the second lens 104 is fixed at both ends to the two second lens frames 126, respectively, and the number of the second lens fixing frames 132 is two. The first protrusion 130 of one of the second lens frames 126 is used for the first screw 118 to pass through, and the first screw 118 is connected to one of the second lens fixing frames 132. The first protrusion 130 on the other second lens frame 126 is used for the first connecting rod 136 to pass through, and the first connecting rod 136 is connected to the other second lens fixing frame 132.

Eyepiece 100 includes third lens frame 138. The third lens frame 138 is located within the barrel 124. The driving mechanism includes a second elastic member 140. The third lens 106 is fixed to the third lens frame 138. The outer side surface of the third lens frame 138 is provided with a second bump 142. The second elastic member 140 connects the third lens frame 138 and the lens barrel 124. When the second rotor 120 moves toward the image side of the eyepiece 100 on the second screw 122, the second bump 142 is pushed to drive the third lens frame 138 and the third lens 106 to move toward the image side of the eyepiece 100. When the second rotor 120 moves toward the object side of the eyepiece 100 on the second screw 122, the second elastic element 140 drives the third lens frame 138 to drive the third lens 106 to move toward the object side of the eyepiece 100.

The second protrusion 142 is provided with a through hole for the second screw 122 to pass through, and the inner diameter of the through hole is larger than the outer diameter of the second screw 122, so that the resistance applied to the third lens 106 during movement is smaller, and the movement of the third lens 106 is facilitated. When the second rotor 120 moves toward the image side of the eyepiece 100 on the second screw 122, the second rotor 122 pushes the second bump 142 to drive the third lens element 106 to move toward the image side of the eyepiece 100, and at this time, the second elastic element 140 is elongated.

When the second rotor 120 moves toward the object side of the eyepiece 100 on the second screw 122, the second elastic element 140 generates a pulling force due to retraction, so as to drive the third lens frame 138 to drive the third lens 106 to move toward the object side of the eyepiece 100. Preferably, the second elastic member 140 is a spring.

It is understood that the third lens 106 can be moved by other means of other screw transmission, for example, the second elastic member 140 can be omitted, and the third lens frame 138 can be directly screwed to the second screw 122, and the third lens 106 can be driven to move back and forth along the optical axis 107 of the eyepiece 100 by the forward rotation and the reverse rotation of the second motor 112.

In addition, in order to facilitate mounting of a driving mechanism that drives the third lens 106, the eyepiece 100 includes a third lens fixing frame 144. The second screw 122 is connected to the third lens fixing frame 144. The lens barrel 124 is formed with a second guide groove 146, and an edge of the third lens fixing frame 144 is located in the second guide groove 146.

In this way, during installation, the third lens structure, which is formed by installing the third lens 106, the third lens frame 138, the second elastic member 140, the second screw 122 and the third lens fixing frame 144, can be installed in the lens barrel 124 along the second guide groove 146 as a whole. Due to the guiding of the second guiding groove 146, the installation mode is convenient and fast.

Further, the third lens 106 is fixed to two third lens frames 138 at both ends, respectively, and the number of the third lens fixing frames 144 is two. The second protrusion 142 of one of the third lens frames 138 is used for the second screw 122 to pass through, and the second screw 122 is connected to one of the third lens fixing frames 144. The second protrusion 142 of the other third lens frame 138 is penetrated by a second connecting rod 148, and the second connecting rod 148 is connected to the other third lens fixing frame 144.

In certain embodiments, the first motor 108 and the second motor 112 each comprise a stepper motor. Therefore, the control mode of the stepping motor is mature and reliable, and the control of the position of the lens is relatively accurate. It can be understood that the stepping motor is widely applied to the zoom lens and the technology is mature. In other embodiments, the type of motor may be selected from other types, such as a voice coil motor.

In some embodiments, display 200 comprises a 2.5 inch display 200.

It is understood that the 2.5 inch display screen 200 is well suited for application to the head mounted electronic device 10.

In some embodiments, first lens 102 is a convex lens, and second lens 104 and third lens 106 are both concave lenses.

In this manner, the aberration of the eyepiece 100 is reduced by the combination of the convex lens and the concave lens to compensate for the aberration.

In some embodiments, the image side and object side surfaces of the first, second, and

third lenses

102, 104, and 106 are aspheric.

Thus, spherical aberration of the eyepiece 100 is prevented from being generated by the first lens 102, the second lens 104 and the third lens 106.

In some embodiments, the field angle adjustment range of eyepiece 100 is 70 ° to 90 ° when at least one of first lens 102, second lens 104, and third lens 106 is moved along optical axis 107 of eyepiece 100.

It is understood that in the embodiment of the present invention, the angle of view of eyepiece 100 is 90 ° at maximum and 70 ° at minimum. That is, the angle of view of eyepiece 100 may be 70 °, 90 °, or any value between 70 ° and 90 °.

Reference will now be made in detail to various embodiments of the head mounted electronic device 10 of the present invention. In the following embodiments, eyepiece 100 further includes a stop disposed on the image side of first lens 102. The

surface numbers

1, 2, 3, 4, 5, 6, 7, and 8 quoted therein will respectively represent the stop, the image side surface of the first lens 102, the object side surface of the first lens 102, the image side surface of the second lens 104, the object side surface of the second lens 104, the image side surface of the third lens 106, the object side surface of the third lens 106, and the display surface of the display screen 200.

The relevant parameters of the elements of the first embodiment of the head mounted electronic device 10 of the present invention are shown in the following table.

Watch 1

In the first embodiment, referring to fig. 2-5, the field angle of eyepiece 100 is 70 °. The first lens 102 is spaced 3.15mm from the second lens 104 on-axis, and the second lens 104 is spaced 36.79mm from the third lens 106 on-axis. Eyepiece 100 has a focal length of 53.56 mm.

As can be seen from fig. 3 to 5, when the field angle is 70 °, the imaging quality of the head-mounted electronic device 10 is better.

The relevant parameters of the elements of the second embodiment of the head mounted electronic device 10 of the present invention are shown in table two below.

Watch two

In a second embodiment, referring to fig. 6-9, eyepiece 100 has an angle of view of 80 °. The first lens 102 is spaced 5.65mm on-axis from the second lens 104, and the second lens 104 is spaced 24.30mm on-axis from the third lens 106. Eyepiece 100 has a focal length of 47.654 mm.

The relevant parameters of the elements in the third embodiment of the head mounted electronic device 10 of the present invention are shown in table three below.

Watch III

In the third embodiment, referring to fig. 10-13, the field angle of eyepiece 100 is 90 °. The first lens 102 is spaced 8.14mm on-axis from the second lens 104, and the second lens 104 is spaced 14.54mm on-axis from the third lens 106. Eyepiece 100 has a focal length of 42.838 mm.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

The utility model provides a head-mounted electronic equipment, its characterized in that includes eyepiece and display screen, follows the direction of picture side to the thing side of eyepiece includes first lens, second lens and third lens in proper order, first lens the second lens with at least one in the third lens can be followed the optical axis round trip movement of eyepiece is in order to realize the eyepiece zooms, the display screen sets up the thing side of third lens.
The head-mounted electronic device of claim 1, wherein the eyepiece comprises a drive mechanism coupled to at least one of the first lens, the second lens, and the third lens and configured to drive movement of at least one of the first lens, the second lens, and the third lens.
The head-mounted electronic device according to claim 2, wherein the driving mechanism comprises a first motor, a first transmission member, a second motor, and a second transmission member, the first motor is connected to the second lens through the first transmission member and drives the second lens to move along the optical axis of the eyepiece, and the second motor is connected to the third lens through the second transmission member and drives the third lens to move along the optical axis of the eyepiece.
The head-mounted electronic device of claim 3, wherein the first transmission member comprises a first rotor and a first screw, the second transmission member comprises a second rotor and a second screw, the first rotor is in threaded connection with the first screw, the first motor is configured to drive the first rotor to move back and forth on the first screw to drive the second lens to move along the optical axis of the eyepiece, the second rotor is in threaded connection with the second screw, and the second motor is configured to drive the second rotor to move back and forth on the second screw to drive the third lens to move along the optical axis of the eyepiece.
The head-mounted electronic device of claim 4, wherein the eyepiece comprises a lens barrel and a second lens frame, the first lens, the second lens, the third lens, the second lens frame, the display screen, and the drive mechanism are located within the lens barrel, the drive mechanism comprises a first elastic member,

the second lens is fixed on the second lens frame, a first lug is arranged on the outer side face of the second lens frame, the first elastic piece is connected with the second lens frame and the lens cone, the first rotor is arranged on the first screw rod and pushes the first lug to drive the second lens frame and the second lens to move towards the object side of the eyepiece when moving towards the object side of the eyepiece, and the first rotor is arranged on the first screw rod and drives the second lens frame to drive the second lens to move towards the image side of the eyepiece when moving towards the image side of the eyepiece.
The head-mounted electronic device according to claim 5, wherein the eyepiece includes a second lens fixing frame, the first screw is connected to the second lens fixing frame, the lens barrel is formed with a first guide groove, and an edge of the second lens fixing frame is located in the first guide groove.
The head-mounted electronic device of claim 4, wherein the eyepiece comprises a lens barrel and a third lens frame, the first lens, the second lens, the third lens frame, the display screen, and the drive mechanism are located within the lens barrel, the drive mechanism comprises a second elastic member,

the third lens is fixed on the third lens frame, a second bump is arranged on the outer side face of the third lens frame, the second elastic piece is connected with the third lens frame and the lens barrel, the second rotor is arranged on the second screw rod and pushes the second bump to drive the third lens frame and the third lens to move towards the image side of the eyepiece when moving towards the image side of the eyepiece, and the second rotor is arranged on the second screw rod and drives the third lens frame to drive the third lens to move towards the object side of the eyepiece when moving towards the object side of the eyepiece.
The head-mounted electronic device according to claim 7, wherein the eyepiece includes a third lens fixing frame, the second screw is connected to the third lens fixing frame, the lens barrel is formed with a second guide groove, and an edge of the third lens fixing frame is located in the second guide groove.
The head-mounted electronic device of claim 1, wherein the display screen comprises a 2.5 inch display screen.
The head-mounted electronic device of claim 1, wherein the first lens is a convex lens, and the second lens and the third lens are both concave lenses.
The head-mounted electronic device of claim 1, wherein image side surfaces and object side surfaces of the first lens, the second lens, and the third lens are aspheric.
The head-mounted electronic device of claim 3, wherein the first motor and the second motor each comprise a stepper motor.
The head-mounted electronic device of claim 1, wherein when at least one of the first lens, the second lens, and the third lens is moved along an optical axis of the eyepiece, an angle of field adjustment range of the eyepiece is 70 ° to 90 °.
The head-mounted electronic device of claim 13, wherein the first lens is spaced 3.15mm from the second lens and the second lens is spaced 36.79mm from the third lens on-axis when the field angle is 70 °.
The head-mounted electronic device of claim 14, wherein the eyepiece has a focal length of 53.56mm at a 70 ° angle of view.
The head-mounted electronic device of claim 13, wherein the first lens is spaced 5.65mm from the second lens and the second lens is spaced 24.30mm from the third lens when the field angle is 80 °.
The head-mounted electronic device of claim 16, wherein the eyepiece has a focal length of 47.654mm at an angle of 80 °.
The head-mounted electronic device of claim 13, wherein the first lens is spaced 8.14mm from the second lens and the second lens is spaced 14.54mm from the third lens when the field angle is 90 °.
The head-mounted electronic device of claim 18, wherein the focal length of the eyepiece is 42.838mm when the field angle is 90 °.