INTERPUPILLARY DISTANCE ADJUSTMENT MODULE AND HEAD MOUNTED ELECTRONIC DEVICE

An interpupillary distance adjustment module includes: a first optical module base including a first slider and a first linkage point; a second optical module base including a second slider and a second linkage point; a linkage mechanism including a linkage rod, a third point and a fourth linkage point; and a base including a first groove, a second groove and a shaft, wherein the first and second grooves are parallel to each other and define a groove direction; wherein when a toggle switch rotates the linkage rod, moves the first optical module base, or moves the second optical module base, the third and fourth linkage points and the first and second linkage points are simultaneously linked and moved, and then the first and second optical module bases are controlled to be equidistantly close to or far away from each other in the groove direction.

This application claims the benefit of Taiwan Patent Application No. 112124325, filed on Jun. 29, 2023, which is hereby incorporated by reference for all purposes as if fully set forth herein.

BACKGROUND

Technical Field

The present disclosure relates to an interpupillary distance adjustment module, in particular to a head mounted electronic device having an interpupillary distance adjustment module.

Related Art

Virtual Reality (VR) technology is a computer simulation system capable of creating and experiencing a virtual world and utilizing a computer for generating an interactive analogous environment of the multi-source information fusion to make users immersed in the interactive environment. With constant development of the technology, VR technology is increasingly applied to industries and fields such as medicine, entertainment, industrial simulation, aerospace and education.

Augmented Reality (AR) technology is to use a camera to capture real images and combine them with some recognition and positioning technology, so that the real images on the screen can be augmented with virtual objects generated by the computer, whereby the user can see coexisted contents in the real world and the virtual world at the same time.

As one of the important devices for realizing the virtual reality technology and the augmented reality technology, a head mounted electronic device is gradually popularized in daily life. The head mounted electronic devices can expand the degree of scientific 3D visualization, and enhance the interaction performance between the user and the computer. With the application of virtual reality technology and augmented reality technology in many fields, people pay more attention to the head mounted electronic devices. In order to make the relevant head mounted electronic devices, such as wearable virtual reality (VR)/augmented reality (AR) glasses adaptable to different age groups, more comfortable use experience must be achieved.

Interpupillary distance (IPD) can be described as the physical distance between the eyes or the width of the eyes. Most head mounted electronic devices have optical modules (including lenses and displays). If the centers of the user's eyes are not aligned with the optical axis of the optical modules, the best definition and field of view cannot be achieved.

Thus, the interpupillary distance adjustment module and the head mounted electronic device need to be provided for solving previous problems.

SUMMARY

An objective of the present disclosure is to provide an interpupillary distance adjustment module can adjust the interpupillary distance or the width of the eyes by the linkage and movement between the linkage rod and the two optical module bases.

To achieve the above objective, the present disclosure provides an interpupillary distance adjustment module comprising: a first optical module base comprising a first body, a first slider and a first linkage point, wherein the first slider and the first linkage point are located on a bottom surface and a side surface of the first body respectively; a second optical module base comprising a second slider and a second linkage point, wherein the second slider and the second linkage point are located on a bottom surface and a side surface of the second body respectively; a linkage mechanism comprising a linkage rod, a third point and a fourth linkage point, wherein the linkage rod has a rotation point, the third and the fourth linkage points are symmetrically disposed at both ends of the rotation point of the linkage rod, and are mechanically connected to the first and second linkage points respectively; and a base supporting the first and second optical module base and comprising at least one first groove, at least one second groove and a shaft, wherein the first and second grooves are parallel to each other and define a first groove direction, the rotation point of the linkage rod is pivotally connected to the shaft, and the first and second sliders are disposed in the first and second grooves respectively and move in the first groove direction; wherein at least one of the first optical module base, the second optical module base and the linkage rod is provided with a toggle switch, whereby when the toggle switch rotates the linkage rod, moves the first optical module base, or moves the second optical module base, the third and fourth linkage points and the first and second linkage points are simultaneously linked and moved, and then the first and second optical module bases are controlled to be equidistantly close to or far away from each other in the first groove direction.

The present disclosure further provides a head mounted electronic device, comprising: a shell; the above-mentioned interpupillary adjustment module of the present disclosure disposed in the shell, wherein the toggle switch is exposed outside the shell; and a controller disposed in the shell.

According to the head mounted electronic device of the present disclosure, the interpupillary distance adjustment module of the present disclosure can adjust the interpupillary distance or the width of the eyes by the linkage and movement between the linkage rod and the two optical module bases, for example the distance is adjusted to be between 50 and 80 mm. When the user sets the correct interpupillary distance or eye width, the image quality of the virtual reality (VR) and the augmented reality (AR) can be maximally increased. When the user looks especially through the optical axes of the two optical modules, the best definition and field of view can be achieved.

DETAILED DESCRIPTION

To make the foregoing objectives, characteristics and features of the present disclosure more comprehensible, preferred embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

FIG.1toFIG.3are schematic top view, side view and bottom view of an interpupillary distance adjustment module according to an embodiment of the present disclosure, showing that first and second optical modules are located at the first position P1.FIG.4toFIG.6are schematic top view, side view and bottom view of an interpupillary distance adjustment module according to an embodiment of the present disclosure, showing that first and second optical modules are located at the second position P2. Please refer toFIG.1toFIG.6, the interpupillary distance adjustment module1includes: a first optical module base11, a second optical module base12, a linkage mechanism13and a base14.

FIG.7is a schematic cross-sectional view along the section line A-A of the interpupillary distance adjustment module inFIG.1andFIG.4. Please refer toFIG.1,FIG.2,FIG.4,FIG.5andFIG.7, the first optical module base11includes a first body110, at least one first slider111and a first linkage point112, wherein the first slider111and the first linkage point112are located on a bottom surface113and a side surface114of the first body110respectively. The second optical module base12includes a second body120, at least a second slider121and a second linkage point122, wherein the second slider121and the second linkage point122are located on a bottom surface123and a side surface124of the second body120respectively. The interpupillary distance adjustment module1further includes: a first optical module11aand a second optical module12a, which are positioned and fixed on the first optical module base11and the second optical module base12respectively. For example, the first and second optical modules11a,12ainclude lenses and displays. The diameters of the first and second optical modules11a,12aare about between 50 and 80 mm.

FIG.8is a schematic cross-sectional view along the section line B-B of the interpupillary distance adjustment module inFIG.1andFIG.4.FIG.9is a partially enlarged schematic plan view of the interpupillary distance adjustment module inFIG.1andFIG.4. Please refer toFIG.1,FIG.4,FIG.8andFIG.9, the linkage mechanism13includes a linkage rod130, a third linkage point133and a fourth linkage point134, wherein the linkage rod130has a rotation point131, the third and the fourth linkage points133,134are symmetrically disposed at both ends of the rotation point131of the linkage rod130, and are mechanically connected to the first and second linkage points112,122respectively. “The third and the fourth linkage points133,134are mechanically connected to the first and second linkage points112,122respectively,” which means that the first and second linkage points112,122respectively include first and second cylindrical sliders1121,1221, and the third the fourth linkage point133,134respectively comprise first and second elongated grooves1331,1341, the first and second cylindrical sliders1121,1221are disposed in the first and second elongated grooves1331,1341, and the first and second elongated grooves1121,1221defines a groove direction135parallel to an axial direction1300of the linkage rod130. For example, the distance between the rotation point131and the first and second elongated grooves1331,1341is about between 10 and 20 mm. The length of the first and second elongated grooves1331,1341is about between 2 and 7 mm.

The first optical module base11is provided with a toggle switch10, the linkage rod130is provided with a toggle switch10, or the second optical module base12is also provided with a toggle switch (not shown). When the toggle switch10rotates the linkage rod130, moves the first optical module base11, or moves the second optical module base12, the first and second cylindrical sliders1121,1221move not only in the groove direction143of the base14but also in the groove direction135of the linkage rod130.

FIG.10is a schematic cross-sectional view along the section line C-C of the interpupillary distance adjustment module inFIG.1andFIG.4. Please refer toFIG.3,FIG.6andFIG.10, the base14supports the first and second optical module bases11,12, and includes at least one first groove141, at least one second groove142and a shaft140, wherein the first and second grooves141,142are parallel to each other and define the groove direction143, the rotation point131of the linkage rod130is pivotally connected to the shaft140, the first and second slider111,121are disposed in the first and second grooves141,142respectively and move in the groove direction143of the base14. For example, the length of the first and second grooves141,142is about between 40 and 50 mm.

Please refer toFIG.1andFIG.4again, when the user rotates the linkage rod130by the toggle switch10, moves the first optical module base11, or moves the second optical module base12, the third and fourth linkage points133,134and the first and second linkage points112,122are simultaneously linked and moved, and then the first and second optical module bases11,12are controlled to be equidistantly close to or far away from each other in the groove direction143, or the first and second optical modules11a,12alocated on the first and second optical module bases11,12are controlled to be equidistantly close to or far away from each other in the groove direction143. For example, the first and second optical modules11a,12amove from the first position P1(shown inFIG.1toFIG.3) to the second position P2(shown inFIG.4toFIG.6), so that the distance between the optical axis of the first optical module11aand the optical axis of the second optical module12ais increased from the first distance D1to the second distance D2, and the first and second optical modules11a,12aare equidistantly far away from each other. Preferably, the distance between the optical axis of the first optical module11aand the optical axis of the second optical module12acan be adjusted to be about between 50 and 80 mm. In other words, according to the interpupillary distance adjustment module of the present disclosure, the user's interpupillary distance or eye width can be adjusted to be about between 50 and 80 mm.

FIG.11a,FIG.11bandFIG.11care first, second and third schematic cross-sectional views of the first and second sliders of an embodiment of the present disclosure. Please refer toFIG.11a,FIG.11b,FIG.11candFIG.7, the first and second sliders111,121are claws15,15′ or screws16. When the first and second sliders111,121are claws15,15′, the claws15,15′ are integrally formed with the first and second bodies110,120respectively, so that the production of parts can be reduced. When the first and second sliders111,121are screws16, the screws16are respectively locked to the first and second bodies110,120, so that the hooked effect can be achieved by a locking manner.

FIG.12is a schematic bottom view of the interpupillary distance adjustment module according to another embodiment of the present disclosure. Please refer toFIG.12,FIG.11bandFIG.11c, when the number of the first groove141is one and the number of the second groove142is one, the first and second sliders111,121respectively comprise an end portion15a,16aof a T-shaped section, which are hooked in the first and second grooves141,142respectively. Although the number of the first groove141and the number of the second groove142are only one respectively, the first and second sliders111,121are hooked in the first and second grooves141,142respectively by the T-shaped section, so the first and second optical module bases11,12can still move smoothly in the groove direction143without skewing. Please refer toFIG.3andFIG.11a,FIG.11bandFIG.11cagain, when the number of the first groove141is at least two and the number of the second groove142is at least two, the first and second sliders111,121respectively comprise an end portion15a′ of an L-shaped section or an end portion15a,16aof a T-shaped section, which are hooked in the first and second grooves141,142respectively. Since the number of the first groove141and the number of the second groove142are two respectively, the first and second optical module bases11,12can move smoothly in the groove direction143without skewing.FIG.13aandFIG.13bare first and second schematic bottom views of an interpupillary distance adjustment module according to another embodiment of the present disclosure. Please refer toFIG.13aandFIG.13b, when the number of the first groove141is at least three and the number of the second groove142is at least three, the adjacent two of the first and second grooves141,142are disposed in a staggered arrangement. Since the number of the first groove141and the number of the second groove142are three respectively, and the adjacent grooves are disposed in a staggered arrangement, the first and second optical module bases11,12can move more smoothly in the groove direction143. The first and second sliders111,121may respectively include an end portion of an L-shaped section or an end portion of a T-shaped section, which are hooked in the first and second grooves141,142respectively.

Please refer toFIG.1,FIG.2andFIG.3again, the assembly method of the interpupillary distance adjustment module of the present disclosure includes the following steps: the first slider111of the first optical module base11and the second slider121of the second optical module base12are disposed in the first and second grooves141,142of the base14respectively, and are hooked into the first and second grooves141,142respectively. The linkage rod130is rotated, so that the third and fourth linkage points133,134of the linkage rod130are mechanically connected to the first link point112of the first optical module base11and the second optical link point112of the second optical module base12respectively. The first and second optical modules11a,12aare positioned and fixed on the first and second optical module bases11,12respectively to complete the assembly of the interpupillary distance adjustment module. The present disclosure can utilize the mechanical connection between the third and fourth linkage points133,134and the first and second linkage points112,122to achieve tight fit design, or the pivot connection between the linkage rod and the shaft to achieves a tight fit design, whereby a damping effect can be produced on the toggle switch10, so as to prevent the linkage rod130, the first optical module base11or the second optical module base12from being accidentally move.

FIG.14is a three-dimensional schematic view of a head mounted electronic device according to an embodiment of the present disclosure. The head mounted electronic device2includes a shell20, at least one interpupillary distance adjustment modules1of the present disclosure, and a controller30. The interpupillary distance adjustment module1is disposed in the shell20. The controller30is disposed in the shell20and electrically connected to the interpupillary distance adjustment module1. The controller30may be a general Processor, a Micro Control Unit (MCU), an Application Processor (AP), a Digital Signal Processor (DSP), a Graphics Processing Unit (GPU) or a Holographic Processing Unit (HPU), or any combination of the above processors, and may include various circuit logics for providing a processing and operation function of data and image and transmitting frame data (such as data for representing character messages, graphs or images) to the image source (such as LCD) of the interpupillary distance adjustment module1. In this embodiment, the toggle switch10is exposed outside the shell20, whereby when the toggle switch10rotates the linkage rod, moves the first optical module base, or moves the second optical module base, the third and fourth linkage points and the first and the second linkage points are simultaneously linked and moved, and then the first optical module located on the first optical module base and the second optical module located on the second optical module base are controlled to be equidistantly close to or far away from each other in the groove direction of the base.

According to the head mounted electronic device of the present disclosure, the interpupillary distance adjustment module of the present disclosure can adjust the interpupillary distance or the width of the eyes by the linkage and movement between the linkage rod and the two optical module bases, for example the distance is adjusted to be between 50 and 80 mm. When the user sets the correct interpupillary distance or eye width, the image quality of the virtual reality (VR) and the augmented reality (AR) can be maximally increased. When the user looks especially through the optical axes of the two optical modules, the best definition and field of view can be achieved.

In view of the above, the foregoing descriptions are merely preferred embodiments of technical means adopted by the present disclosure to solve the problem, but are not intended to limit the scope of the embodiments of the present disclosure. That is, all equivalent changes and modifications made in accordance with the scope of the patent application of the present disclosure or made in accordance with the scope of the patent of the present disclosure fall within the scope of the patent of the present disclosure.