Wireless position calibration device, display system and wearable device

Abstract

The present application provides a wireless position calibration device, a display system and a wearable device. The wireless position calibration device includes a rigid body, a plurality of point light sources, a motion sensor and a wireless transmission module. The rigid body has an inner concave surface and includes a head portion, a connecting portion and a tail portion. The connecting portion is connected to the head portion and the tail portion. The point light sources are fixed at a plurality of positions outside the inner concave surface of the rigid body. The motion sensor is configured in the rigid body to sense the motion of the rigid body and generate motion information. The wireless transmission module is configured in the rigid body and electrically connected to the motion sensor to wirelessly transmit the motion information to the head-mounted device. The image capture module of the head-mounted device is used to capture the pattern composed of the point light sources. The head-mounted device calculates the relative position of the wireless position calibration device according to the pattern and the motion information.

Description

TECHNICAL FIELD

[0001] The present application relates to a wireless position calibration device, a display system and a wearable device. BACKGROUND

[0002] Virtual Reality (VR) technology is becoming more and more popular. When operating a virtual reality device, if control is to be performed without holding a hand or other objects or other body parts are to be tracked, the controller must be bound to the object or body part. However, the volume and weight of the controller make it difficult for the user to have better flexibility and convenience when operating. Moreover, since the controller must be bound to the object or body part, how to be applied to objects of various sizes and the limbs of users of different body types is also a problem to be overcome. SUMMARY

[0003] The present application is directed to a wireless position calibration device, a display system and a wearable device, which can improve the problem of poor operation flexibility and have wide applicability.

[0004] According to an embodiment of the present application, a wireless position calibration device is configured to wirelessly communicate with a head-mounted device. The wireless position calibration device includes a rigid body, a plurality of point light sources, a motion sensor, and a wireless transmission module. The rigid body has an inner concave surface and includes a head portion, a connecting portion, and a tail portion. The connecting portion is connected to the head portion and the tail portion. The plurality of point light sources are fixed at a plurality of positions outside the inner concave surface of the rigid body. The motion sensor is disposed in the rigid body to sense a motion of the rigid body and generate a motion information. The wireless transmission module is disposed in the rigid body and electrically connected to the motion sensor to wirelessly transmit the motion information to the head-mounted device. The head-mounted device includes at least one image capturing module. The image capturing module is configured to capture a pattern composed of the plurality of point light sources. The head-mounted device calculates a position of the wireless position calibration device relative to the head-mounted device according to the pattern and the motion information.

[0005] According to an embodiment of the present application, a display system includes a head-mounted device and the aforementioned wireless position calibration device.

[0006] In an embodiment of the present application, the wireless position calibration device further includes a coupling member assembled to the rigid body and configured to fix the rigid body to a target.

[0007] In an embodiment of the present application, when the rigid body is fixed to a wrist of a user, the inner concave surface at the tail portion abuts against a back surface of the wrist, and the inner concave surface at the head portion abuts against an inner surface of the wrist.

[0008] In one embodiment of the present application, the head has an end face. At least one of the point light sources is located on the end face. When the rigid body is fixed to a wrist of a user, the end face is adjacent to an inner face of the wrist of the user, and the cross-sectional area of the head is larger than that of the tail.

[0009] In one embodiment of the present application, when the rigid body is fixed to a wrist of a user, the arrangement density of the point light sources located on a side of the rigid body close to an elbow of the user is larger than that of the point light sources located on a side of the rigid body close to a palm of the user.

[0010] In one embodiment of the present application, when the rigid body is fixed to a wrist of a user, the arrangement density of the point light sources located on a side of the head close to a thumb of the user is larger than that of the point light sources located on a side of the tail close to a little finger of the user.

[0011] In one embodiment of the present application, the rigid body is substantially L-shaped. When the rigid body is fixed to a wrist of a user, the head is adjacent to a radius of the wrist, and the tail is adjacent to an ulna of the wrist.

[0012] According to an embodiment of the present application, a wearable device is adapted to be fixed to a wrist of a user. The wearable device includes a rigid body and a coupling member. The rigid body has an inner concave face and includes a head, a connecting portion, and a tail. The connecting portion is connected to the head and the tail. The inner concave face located at the tail is adapted to abut against a back face of the wrist, and the inner concave face located at the head is adapted to abut against an inner face of the wrist. The coupling member is assembled to the rigid body and is used to fix the rigid body to the wrist.

[0013] In one embodiment of the present application, the rigid body is substantially L-shaped. When the rigid body is fixed to a wrist of a user, the head is adjacent to a radius of the wrist, and the tail is adjacent to an ulna of the wrist.

[0014] In one embodiment of the present application, the coupling member includes an extension member and a strap. One end of the extension member is pivoted to the head and extends to an inner face of the wrist. The other end of the extension member has an opening. The wrist is located between the rigid body and the extension member. One end of the strap is pivoted to the tail, and the other end of the strap is adapted to be fixed to the strap not passing through the opening.

[0015] In one embodiment of the present application, the extension member is a bending member. A bending angle of the bending member is greater than or equal to 90 degrees and less than 180 degrees.

[0016] In one embodiment of the present application, the other end of the strap is adapted to be fixed to the strap not passing through the opening in a manner of a devil's hair.

[0017] In an embodiment of the present application, the wearable device further comprises an electronic module assembled to the rigid body. The electronic module comprises a point light source, a lens, a light sensor, a vibrator, a speaker or a bio-information sensor.

[0018] In the wireless position calibration device and display system according to the embodiment of the present application, the head-mounted device can determine the posture of the wireless position calibration device, not only having the flexibility and convenience of operation, but also having wide applicability. In addition, the wearable device considering the ergonomic geometric design consideration also has wide applicability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the display system of an embodiment of the present application;

[0020] Figure 2 is a schematic diagram of the wireless position calibration device of Figure 1 only retaining the point light source visible at the view angle;

[0021] Figure 3 is a schematic diagram of the wireless position calibration device of Figure 1 when fixed to the wrist of the user;

[0022] Figure 4A is a schematic diagram of the wireless position calibration device of Figure 1 at another view angle;

[0023] Figure 4B is a schematic diagram of the wireless position calibration device of Figure 4A only retaining the point light source visible at the view angle;

[0024] Figure 5A is a schematic diagram of the wireless position calibration device of Figure 1 at another view angle;

[0025] Figure 5B is a schematic diagram of the wireless position calibration device of Figure 1 at another view angle;

[0026] Figure 6 is a schematic diagram of the wireless position calibration device of Figure 1 when fixed to the wrist of the user;

[0027] Figure 7 is a schematic diagram of the wireless position calibration device of Figure 1 when fixed to the wrist of the user at another view angle;

[0028] Figure 8 is a schematic diagram of the wearable device of an embodiment of the present application when fixed to the wrist;

[0029] Figure 9A andFigure 9B is a schematic diagram of a process of fixing a wearable device on a wrist according to another embodiment of the present application;

[0030] Figure 10 is Figure 9A a schematic diagram of fixing a wearable device on another wrist. DETAILED DESCRIPTION

[0031] Reference will now be made in detail to the exemplary embodiments of the present application, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.

[0032] Figure 1 is a schematic diagram of a display system according to an embodiment of the present application. Please refer to Figure 1 , the display system 50 of the present embodiment comprises a head-mounted device 52 and a wireless position marker 100. The display system 50 is applied in a virtual reality system, an augmented reality system, a mixed reality system or other systems, for example. The wireless position marker 100 is used to wirelessly communicate with the head-mounted device 52. The head-mounted device 52 is adapted to be worn on a user's head and can provide a display screen for the user to watch or enable the user to see computer images overlaid on the real environment.

[0033] The wireless position marker 100 of the present embodiment comprises a rigid body 110, a plurality of point light sources 120, a motion sensor 130 and a wireless transmission module 140. The plurality of point light sources 120 are fixed on the rigid body 110 at a plurality of positions. The rigid body 110 is mainly composed of a material that hardly produces elastic or plastic deformation. Therefore, the relative positions between the plurality of point light sources 120 fixed on the rigid body 110 can remain unchanged.

[0034] The motion sensor 130 is configured in the rigid body 110 to sense the motion of the rigid body 110 and generate a motion information. The motion sensor 130 can be an inertial measurement unit (IMU). For example, the motion sensor 130 can be a six degrees of freedom IMU (6-DOF IMU) or a nine degrees of freedom IMU (9-DOF IMU). The 6-DOF IMU is capable of outputting linear acceleration values of X, Y, and Z axes and angular velocity values of X, Y, and Z axes. The 9-DOF IMU is capable of outputting linear acceleration values of X, Y, and Z axes, angular velocity values of X, Y, and Z axes, and magnetic force values of X, Y, and Z axes. In more detail, the 6-DOF IMU includes a three-axis accelerometer and a three-axis gyroscope. The 9-DOF IMU includes a three-axis accelerometer, a three-axis gyroscope, and a three-axis magnetometer. The wireless transmission module 140 is configured in the rigid body 110 and electrically connected to the motion sensor 130 to wirelessly transmit the motion information to the head-mounted device 52.

[0035] Figure 2 is Figure 1 The wireless position calibration device of the present application only retains the schematic diagram of the point light source visible under the perspective. Please refer to Figure 1 and Figure 2 The head-mounted device 52 includes at least one image capturing module 52A. In the present embodiment, multiple image capturing modules 52A are taken as an example, but the present application is not limited thereto. The image capturing module 52 is used to capture a pattern composed of the point light source 120. In Figure 2In this embodiment, the rigid body 110 is made of a material that is opaque, so the image capture module 52A can only capture the pattern formed by the dot light sources 120 that are not blocked by the rigid body 110. In other words, the dot light sources 120 are located on the surface of the rigid body 110. In other embodiments, the rigid body 110 has a transparent shell, and the dot light sources 120 are located below the transparent shell, so the image capture module 52A can capture the pattern formed by the dot light sources 120 located below the transparent shell. In this embodiment, the dot light sources 120 can be light emitting diodes, organic light emitting diodes, or other dot light sources. The dot light sources 120 can be used to emit visible light or invisible light, where the invisible light can be infrared light, as long as the image capture module 52A can capture the light emitted by the dot light sources 120. In addition, although this embodiment uses dot light sources 120 as an example, in other embodiments, linear light sources or other light sources of any shape can also be used, as long as the image capture module 52A can capture and determine the changes in the pattern formed by the light sources. The image capture module 52A can be a visible light or invisible light lens, where the invisible light can be infrared light.

[0036] According to the pattern captured by the image capture module 52A and the motion information provided by the wireless position calibration device 100, the head-mounted device 52 can calculate the position of the wireless position calibration device 100 relative to the head-mounted device 52. The "position" mentioned here can cover a variety of information, which is illustrated below, but the present application is not limited thereto.

[0037] Because the relative positions between the plurality of point light sources 120 on the rigid body 110 are fixed and can be obtained in advance, the head-mounted device 52 can determine the pose of the wireless position marker 100 relative to the head-mounted device 52 by comparing the pattern of the point light sources 120 captured with the relative positions between the point light sources 120 stored in advance. In this way, the image viewed by the user in the head-mounted device 52 can be correspondingly changed or other feedback can be made. In addition, the head-mounted device 52 can determine the orientation of the wireless position marker 100 relative to the head-mounted device 52 according to the orientation of the pattern captured. Furthermore, although the frequency of image capture by the image capture module 52A is much lower than the sensing frequency of the motion sensor 130, the head-mounted device 52 can determine the orientation and pose change of the wireless position marker 100 relative to the head-mounted device 52 according to the motion information provided by the motion sensor 130 and the image data captured by the image capture module 52A. Therefore, the head-mounted device 52 can calculate the distance, speed, acceleration, pose change, and three-axis coordinates in space of the wireless position marker 100 relative to the head-mounted device 52 based on these two kinds of data. In other words, the head-mounted device 52 can calculate the three-axis coordinate values and three-axis angle values of the wireless position marker 100 relative to the head-mounted device 52 in space based on these two kinds of data.

[0038] Figure 3 is Figure 1 a cross-sectional view of the wireless position marker 100 fixed to the wrist of a user. Please refer to Figure 1 and Figure 3 In this embodiment, the rigid body 110 has an inner concave surface 112. The rigid body 110 includes a head portion 110A, a connecting portion 110B, and a tail portion 110C. The connecting portion 110B is connected to the head portion 110A and the tail portion 110C. In this embodiment, the opposite sides of the connecting portion 110B are connected to the head portion 110A and the tail portion 110C, respectively. In general, the wireless position marker 100 is fixed to the user's limbs, so the wireless position marker 100 with the inner concave surface 112 can better fit the user's limbs. In other words, the inner concave surface 112 can be used to face and contact the bound object or the user's limbs.

[0039] In this embodiment, when the rigid body 110 is fixed to a user's wrist 20, the inner surface 112 at the tail portion 110C abuts against the back surface 22 of the wrist 20, and the inner surface 112 at the head portion 110A abuts against the inner side surface 24 of the wrist 20. Since neither the inner surface 26 of the back surface 22 of the wrist 20 nor the other side surface of the inner side surface 24 of the wrist 20 abuts against the rigid body 110, the rigid body 110 can be stably fixed to the wrist 20 regardless of the thickness of the user's wrist 20, i.e. regardless of whether the length or the width of the cross-sectional shape of the user's wrist 20 is larger. In this embodiment, the rigid body 110 is substantially L-shaped. In other embodiments, the rigid body 110 can be arc-shaped, L-shaped, or a notched ring.

[0040] In this embodiment, the head portion 110A has an end surface 112B. At least one of the point light sources 120 is located at the end surface 112B. When the rigid body 110 is fixed to the user's wrist 20, the end surface 112B is adjacent to the inner surface 26 of the user's wrist 20. From Figure 3 It can be seen that the cross-sectional area of the head portion 110A is larger than that of the tail portion 110C.

[0041] In this embodiment, the wireless position calibration device 100 further comprises a coupling member 150 for fixing the rigid body 110 to a target. The target here is the wrist 20, but can also be an object, without being limited to the present application. The coupling member 150 in this embodiment is exemplified by a watchband, but can also be other coupling members, and coupled by a clasp, a clasp groove, a screw hole, or other means. The coupling member 150 is preferably designed to have a variable length, but is not limited to the present application. However, the rigid body 110 can also be fixed to the user's body directly via a glove, an arm sleeve, a hat, a shoe cover, a leg cover, a bracelet, or a garment, without being limited to the present application. Similarly, the rigid body 210 can also be fixed to a racket, a bat, a toy gun, or other handheld objects via a clasp, a clasp groove, a screw hole, or other structures, to provide position data of the object.

[0042] Figure 4A is a schematic view of the wireless position calibration device of Figure 1 from another perspective. Figure 4B is a schematic view of the wireless position calibration device of Figure 4A only showing the point light sources visible from this perspective. Reference is made to Figure 2 , Figure 4A and Figure 4BAs can be seen, when the posture of the wireless position calibration device 100 changes relative to the head-mounted device 52, the pattern composed of the point light sources 120 that the image capture module 52A can capture also changes. By comparing the relative positions between the point light sources 120 obtained in advance with the pattern captured, the head-mounted device 52 can determine the posture of the wireless position calibration device 100 relative to the head-mounted device 52.

[0043] Figure 5A is a schematic view of the wireless position calibration device of Figure 1 from another perspective. Figure 5B is a schematic view of the wireless position calibration device of Figure 1 from yet another perspective. As can be seen from Figure 5A , the distribution positions of the point light sources 120 on the rigid body 110 in this embodiment can be irregular, and the distribution density can also vary according to the tracking requirements. In addition, as can be seen from Figure 5B , the point light sources 120 in this embodiment are only distributed on the outer surface of the rigid body 110, and the inner concave surface 112 is not configured with point light sources 120.

[0044] Figure 6 is a schematic view of the wireless position calibration device of Figure 1 fixed to the wrist of a user. Figure 1 The image captured by the image capture module 52A of the head-mounted device 52 must contain at least four point light sources 120 to calculate the position data and the posture data (angle) of the wireless position calibration device 100. In short, four point light sources 120 can form a stereoscopic framework to compare with the relative positions between the point light sources 120 stored in advance. Please refer to Figure 6 , in this embodiment, when the rigid body 110 is fixed to the wrist 20 of a user, the configuration density of the point light sources 120 located on the side of the rigid body 110 close to the elbow of the user (i.e. the right side in Figure 6 ) is greater than the configuration density of the point light sources 120 located on the side of the rigid body 110 close to the palm of the user (i.e. the left side in Figure 6 ). When the wireless position calibration device 100 is fixed to the wrist of a user, the image that the head-mounted device 52 can capture is usually the side of the rigid body 110 close to the elbow of the user, so this side needs to be distributed with more point light sources 120, and the other side can be distributed with fewer point light sources 120. In this way, the volume of the wireless position calibration device 100 can be reduced. It is worth noting that the light emitted by the point light sources 120 in this embodiment does not carry data. However, in other embodiments, the light emitted by the point light sources 120 carries signals, so the head-mounted device 52 can also recognize the codes represented by each point light source 120.

[0045] Figure 7 is a schematic view of the wireless position calibration device of Figure 1Fig. 2 is a schematic view of another perspective view of the wireless position marker device fixed to the wrist of the user. Please refer to Fig. 1 Figure 5A With reference to Fig. 1, the wireless position marker device 100 is fixed to the wrist 20A of the user. The rigid body 110 is designed based on the ergonomics of the human body. The rigid body 110 is not limited to the use of the wireless position marker device 100, but can also be applied to other wearable devices. The design concept of the rigid body 110 and other applications are described below. Figure 7 In the present embodiment, the configuration density of the point light sources 120 at the head portion 110A of the rigid body 110 near the thumb of the user is greater than the configuration density of the point light sources 120 at the tail portion 110C of the rigid body 110 near the little finger of the user when the rigid body 110 is fixed to the wrist of the user. When the wireless position marker device 100 is fixed to the wrist of the user and the elbow of the user is bent, the head-mounted device 52 can usually capture the head portion 110A of the rigid body 110 near the thumb of the user, so this side needs to be distributed with more point light sources 120, and the tail portion 110C on the other side can be distributed with fewer point light sources 120. In more detail, when the palm of the user faces the head-mounted device 52, since the head-mounted device 52 can only capture the image near the end surface 112B of the head portion 110A, the head portion 110A needs to be configured with more point light sources 120 than the tail portion 110C, so that the head-mounted device 52 can capture a sufficient number of point light source 120 images to facilitate positioning the pose of the wireless position marker device 100.

[0046] Since the shape of the rigid body 110 is designed based on the ergonomics of the human body, the rigid body 110 is not limited to the use of the wireless position marker device 100, but can also be applied to other wearable devices. The design concept of the rigid body 110 and other applications are described below.

[0047] Figure 8 Fig. 2 is a schematic view of another perspective view of the wireless position marker device fixed to the wrist of the user. Please refer to Fig. 1 Figure 8 The wearable device 200 of the present embodiment is adapted to be fixed to a wrist 20A of a user. For ease of description, Figure 8 Fig. 2 is a schematic view of another perspective view of the wireless position marker device fixed to the wrist of the user. Please refer to Fig. 1

[0048] In the wearable device 200 of the present embodiment, only the back surface 22A and the inner surface 24A of the wrist 20A abut against the concave surface 212 of the rigid body 210, while the other opposite surfaces of the wrist 20A do not abut against the concave surface 212 of the rigid body 210. Therefore, the wearable device 200 can be fitted on the wrist 20A comfortably regardless of the size of the wrist 20A, and has wide applicability.

[0049] In the present embodiment, the rigid body 210 is substantially L-shaped. When the rigid body 210 is fixed to the wrist 20A of a user, the head portion 210A is adjacent to a radius 20A1 of the wrist 20A, and the tail portion 210C is adjacent to an ulna 20A2 of the wrist 20A. The shape of the arc formed by the radius 20A1 and the ulna 20A2 substantially matches the shape of the concave surface 212 at the tail portion 210C, and thus the concave surface 212 at the tail portion 210C is adapted to abut against the back surface 22A of the wrist 20A. The shape of the arc formed by the side surface of the radius 20A1 substantially matches the shape of the concave surface 212 at the head portion 210A, and thus the concave surface 212 at the head portion 210A is adapted to abut against the inner surface 24A of the wrist 20A. Since the rigid body 210 is supported by two discontinuous arcs formed by the back surface 22A and the inner surface 24A of the wrist 20A and forms a turning feature, the rigid body 210 is less likely to slide when the wearable device 200 is shaken. In other words, the coupling member 220 can fix the wearable device 200 to the wrist 20A more stably than prior art devices even if it is not tightened too much, and this design can be applied to wrists of different sizes.

[0050] In the present embodiment, the wearable device 200 further comprises an electronic module 230 assembled to the rigid body 210. The electronic module 230 comprises a light source, a lens, a light sensor, a vibrator, a speaker, a bio-information sensor, other electronic modules, or a combination thereof. In other words, the wearable device 200 can provide various functions according to requirements, and is not limited to the wireless position marker 100 mentioned in the above embodiments. In addition, the bio-information sensor can output electrocardiography (ECG) data or photoplethysmography (PPG) signals.

[0051] Figure 9A With Figure 9B is a schematic diagram of the process of fixing a wearable device according to another embodiment of the present application to a wrist. Please refer to Figure 9A , the wearable device 300 of the present embodiment is similar to the wearable device 200 of the above embodiment, and the differences between the wearable device 300 and the wearable device 200 will be described below. Figure 8The wearable device 200 of the present embodiment is similar to the wearable device 200 of the first embodiment, except that the coupling member 320 of the wearable device 300 of the present embodiment includes an extension member 322 and a strap 324. One end of the extension member 322 is pivotally connected to the head portion 310A of the rigid body 310 of the wearable device 300 and extends to the inner surface 26A of the wrist 20A. The other end of the extension member 322 has an opening 322A. The wrist 20A is located between the rigid body 310 and the extension member 322. One end of the strap 324 is pivotally connected to the tail portion 310C of the rigid body 310, and the other end of the strap 324 is adapted to be fixed to the strap 324 that does not pass through the opening 322A.

[0052] When the user pulls the other end of the strap 324 in the direction of the arrow A12, i.e., the force exerted by the user is approximately in the horizontal direction, the extension member 322 pivotally connected to the head portion 310A of the rigid body 310 can rotate in the direction of the arrow A14 to change the force exerted to be approximately upward, thereby shortening the excess strap at the lower position of the strap 324, and the rigid body 310 is hardly forced to move. Figure 9A Figure 9B When the user pulls the other end of the strap 324 in the direction of the arrow A16, i.e., the force exerted by the user is approximately in the vertical downward direction, the extension member 322 transmits the downward force to the rigid body 310 to pull it in the direction of the wrist 20A, thereby increasing the friction between the rigid body 310 and the wrist 20A and simultaneously shortening the excess strap, so that the strap 324 can be tightened and is not easily moved to the rigid body 310.

[0053] The wearable device 300 of the present embodiment has a simple structure and is combined with ergonomic geometric design considerations. Therefore, when the user fastens the wearable device 300 to the wrist 20A, the user can easily find the appropriate force exertion angle to pull the other end of the strap 324 and complete the tightening and fixing of the strap 324, without causing the rigid body 310 to deviate, and easily fix the wearable device 300 at the desired tracking position on the wrist 20A. Moreover, because of the extension member 322, the wrist 20A can be located between the rigid body 310 and the extension member 322, so that the rigid body 310 can be temporarily balanced and supported on the wrist 20A before the strap 324 is tightened, which is easy to operate with one hand. Compared with the tightening of the strap 324 entirely by the soft strap 324, the rigid extension member 322 can provide better resistance to the turning restraint force.

[0054] ​In this embodiment, the extension member 322 is a bent member. The bent angle G10 of the bent member is greater than or equal to 90 degrees and less than 180 degrees. In this embodiment, the other end of the strap 324 is adapted to pass through the opening 322A to be fixed to the strap 324 not passing through the opening 322A in a manner of a magic carpet, but the present application is not limited thereto. Since the extension member 322 is a bent member, when the user pulls the strap 324, the user's wrist is less likely to be pinched between the extension member 322 and the rigid body 310 to cause pain, that is, the pinching hand condition is less likely to occur.

[0055] Figure 10 is Figure 9A a schematic view of the wearing device fixed to the other wrist. Please refer to Figure 10 In this embodiment, the wearing device 300 is worn on the thicker wrist 20B. Since the extension member 322 can rotate, the wearing device 300 can also be worn on the thicker wrist 20B in a snug manner.

[0056] In summary, in the wireless position calibration device, the display system and the wearing device of the present application, the head-mounted device can determine the posture of the wireless position calibration device according to the change of the pattern composed of the plurality of point light sources on the rigid body of the wireless position calibration device, and the shape of the rigid body is designed to be suitable for being bound on various sizes of targets, not only having the flexibility and convenience of operation, but also having wide applicability. In addition, as long as the wireless position calibration device is fixed to a general object, this object can be transformed into an electronic accessory capable of providing position data to facilitate interaction with the content displayed by the head-mounted device, while reducing the development cost of such an electronic accessory capable of interacting with the head-mounted device. In addition, in the wearing device of the present application, the user can easily tighten the coupling member with one hand without being easily offset, and after being fixed, it is also not easy to be offset due to vibration. In addition, it also provides the user with more intuitive wearing, and the coupling member does not need to be tightened too much to reach the required position and ensure the stability in use.

[0057] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A wireless location calibration device for wireless communication with a head-mounted device, characterized in that, The wireless position calibration device comprises: a rigid body having an inner concave surface and comprising a head portion, a connecting portion and a tail portion, wherein the connecting portion is connected to the head portion and the tail portion; a plurality of point light sources fixed at a plurality of positions outside the inner concave surface of the rigid body; a motion sensor configured in the rigid body to sense a motion of the rigid body and generate motion information; and a wireless transmission module configured in the rigid body and electrically connected to the motion sensor to wirelessly transmit the motion information to the head-mounted device, wherein the head-mounted device comprises at least one image capturing module to capture a pattern composed of the point light sources, and the head-mounted device calculates a position of the wireless position calibration device relative to the head-mounted device according to the pattern and the motion information, when the rigid body is fixed to a wrist of a user, a configuration density of the point light sources of the head portion located on a side close to a thumb of the user is greater than a configuration density of the point light sources of the tail portion located on a side close to a little finger of the user.

2. The wireless position marking device of claim 1, wherein, Further comprising a coupling member assembled to the rigid body and used to fix the rigid body to a target.

3. The wireless position location device of claim 1, wherein, When the rigid body is fixed to the wrist of the user, the inner concave surface of the tail portion abuts against a back surface of the wrist, and the inner concave surface of the head portion abuts against an inner surface of the wrist.

4. The wireless position location device of claim 1, wherein, The head portion has an end surface, at least one of the point light sources is located on the end surface, when the rigid body is fixed to the wrist of the user, the end surface is adjacent to an inner surface of the wrist of the user, and a cross-sectional area of the head portion is greater than a cross-sectional area of the tail portion.

5. The wireless position location device of claim 1, wherein, When the rigid body is fixed to the wrist of the user, a configuration density of the point light sources of the rigid body located on a side close to an elbow of the user is greater than a configuration density of the point light sources of the rigid body located on a side close to a palm of the user.

6. The wireless position location device of claim 1, wherein, The rigid body is substantially L-shaped, when the rigid body is fixed to the wrist of the user, the head portion is adjacent to a radius of the wrist, and the tail portion is adjacent to an ulna of the wrist.

7. A display system comprising: a head-mounted device comprising at least one image capturing module; and a wireless position calibration device to wirelessly communicate with the head-mounted device, the wireless position calibration device comprising: a rigid body having an inner concave surface and comprising a head portion, a connecting portion and a tail portion, wherein the connecting portion is connected to the head portion and the tail portion; a plurality of point light sources fixed at a plurality of positions outside the inner concave surface of the rigid body; a motion sensor configured in the rigid body to sense a motion of the rigid body and generate motion information; and a wireless transmission module configured in the rigid body and electrically connected to the motion sensor to wirelessly transmit the motion information to the head-mounted device, wherein the image capturing module is to capture a pattern composed of the point light sources, and the head-mounted device calculates a position of the wireless position calibration device relative to the head-mounted device according to the pattern and the motion information, when the rigid body is fixed to a wrist of a user, a configuration density of the point light sources of the head portion located on a side close to a thumb of the user is greater than a configuration density of the point light sources of the tail portion located on a side close to a little finger of the user.

8. The display system of claim 7, wherein, The wireless position calibration device further comprises a coupling member assembled to the rigid body and used to fix the rigid body to a target.

9. The display system of claim 7, wherein, When the rigid body is fixed to the wrist of the user, the inner concave surface at the tail portion abuts against the back of the wrist, and the inner concave surface at the head portion abuts against the inner side of the wrist.

10. The display system of claim 7, wherein, The head portion has an end surface, at least one of the point light sources is located at the end surface, the end surface is adjacent to the inner side of the wrist of the user when the rigid body is fixed to the wrist of the user, and the cross-sectional area of the head portion is greater than the cross-sectional area of the tail portion.

11. The display system of claim 7, wherein, When the rigid body is fixed to the wrist of the user, the arrangement density of the point light sources at the side of the rigid body close to the elbow of the user is greater than the arrangement density of the point light sources at the side of the rigid body close to the palm of the user.

12. The display system of claim 7, wherein, The rigid body is substantially L-shaped, the head portion is adjacent to the radius of the wrist, and the tail portion is adjacent to the ulna of the wrist when the rigid body is fixed to the wrist of the user.

13. A wearable device adapted to be fixed to a wrist of a user, the wearable device comprising: a rigid body having an inner concave surface and comprising a head portion, a connecting portion, and a tail portion, wherein the connecting portion is connected to the head portion and the tail portion, the inner concave surface at the tail portion is adapted to abut against a back of the wrist, and the inner concave surface at the head portion is adapted to abut against an inner side of the wrist; and a coupling member assembled to the rigid body and used to fix the rigid body to the wrist, the coupling member comprising: an extension member having one end pivoted to the head portion and extending to an inner side of the wrist, and the other end of the extension member having an opening, wherein the wrist is located between the rigid body and the extension member; and a strap having one end pivoted to the tail portion, and the other end of the strap adapted to be fixed to the strap not passing through the opening.

14. The wearable device of claim 13, wherein, The rigid body is substantially L-shaped, the head portion is adjacent to the radius of the wrist, and the tail portion is adjacent to the ulna of the wrist when the rigid body is fixed to the wrist of the user.

15. The wearable device of claim 13, wherein, The extension member is a bending member, and the bending angle of the bending member is greater than or equal to 90 degrees and less than 180 degrees.

16. The wearable device of claim 13, wherein, The other end of the strap is adapted to be fixed to the strap not passing through the opening in a manner of a devil's felt.

17. The wearable device of claim 13, wherein, Further comprising an electronic module assembled to the rigid body, wherein the electronic module comprises a point light source, a lens, a light sensor, a vibrator, a loudspeaker, or a biological information sensor.

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