TWI697695B - Head-mounted display - Google Patents

Abstract

A head-mounted display includes a casing, a first display assembly, a second display assembly and an interpupillary distance adjustment mechanism. The first display assembly, the second display assembly and an interpupillary distance adjustment mechanism are disposed in the casing. A distance between the first display assembly and the second display assembly is able to be adjusted by the interpupillary distance adjustment mechanism.

Description

Head-mounted display device

The present invention relates to a display device, and more particularly to a head-mounted display device.

Head-mounted display devices are currently the most widely used virtual reality equipment. Users need to wear them on their heads and bring the display screen close to the eyes, so that the images of the three-dimensional virtual scene can be directly presented in front of the eyes, so as to experience the virtual reality A better sense of presence is obtained in the process.

Generally speaking, head-mounted display devices can be roughly divided into two parts: display components and head-mounted displays, and the display components are provided with a display screen and a lens. Furthermore, the lens is used to adjust the object distance and focal length, and by the cooperation of the display screen and the lens, the virtual environment can be made clear in front of the user's eyes. In terms of the imaging principle of human eyes, both eyes look at the same object, and the objects are respectively imaged at the retinas of the eyes and overlapped in the visual center of the brain to become a complete and three-dimensional single object image. This visual function is called Single vision with both eyes. In the head-mounted display device, the number of lenses in the display assembly is at least two, and they are arranged side by side. In order to obtain a better visual effect, the pupil center, lens center and display screen center should be on the same straight line.

However, the interpupillary distance of each user is different, and the distance between the centers of the two lenses must be adjusted to coincide with the interpupillary distance of the user. The existing adjustment methods of the distance between the centers of the two lenses can be divided into physical adjustment and software adjustment. As far as the adjustment method of physical adjustment is concerned, a specific adjustment mechanism drives the two lenses to slide relative to each other, but the adjustment mechanism has been proposed. There are situations such as poor operational reliability or stability.

The present invention provides a head-mounted display device, which has excellent reliability and stability.

The head-mounted display device of the present invention includes a casing, a first display assembly, a second display assembly, and a pupil distance adjustment mechanism. The first display component, the second display component and the pupil distance adjustment mechanism are arranged in the casing. The pupil distance adjustment mechanism includes a screw, a first driven gear, a positioning gear, a driving rod, a driving gear, a driven rod, and a second driven gear. The screw screw connects the first display component and the second display component. The first driven gear and the positioning gear are sleeved on the screw. The driving rod is parallel to the screw and includes a driving clamping part. The driven rod is parallel to the screw and is aligned with the driving rod on the axis. The driven rod includes a driven clamping part. The second driven gear is sleeved on the driven rod, wherein the second driven gear is meshed with the first driven gear, and the driving clamping portion and the driven clamping part are between the driving gear and the second driven gear. The driving clamping part is aligned with the driven clamping part on the axis, the driving gear is engaged with the positioning gear and the driving clamping part is separated from the driven clamping part, or the driving gear is separated from the positioning gear and the driving clamping is connected The part is clamped to the driven clamp part.

Based on the above, the head-mounted display device of the present invention can adjust the distance between the first display component and the second display component through the operation of the interpupillary distance adjustment mechanism, so as to achieve the purpose of accurately adjusting the interpupillary distance. The interpupillary distance adjustment mechanism of the invented head-mounted display device has excellent operational reliability and stability.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

FIG. 1 is a schematic diagram of a head-mounted display device according to an embodiment of the invention. 1, in this embodiment, the head-mounted display device 10 includes a casing 11, a first display assembly 12, a second display assembly 13, and a pupil distance adjustment mechanism 100, and the first display assembly 12 and the second display assembly 13 and the interpupillary distance adjustment mechanism 100 are arranged in the casing 11. Specifically, the casing 11 has a window area 11a for exposing the light-emitting sides of the first display assembly 12 and the second display assembly 13, and the distance between the first display assembly 12 and the second display assembly 13 is adjusted It can be used to change the distance between the lens center of the first display assembly 12 and the lens center of the second display assembly 13 to meet the interpupillary distances of different users.

Both the first display component 12 and the second display component 13 have the freedom of movement of sliding in the first direction D1 and sliding in the second direction D2 opposite to the first direction D1. The operation of the pupil distance adjustment mechanism 100 drives the first A display element 12 slides in the first direction D1 and drives the second display element 13 to slide in the second direction D2, so as to reduce the distance between the first display element 12 and the second display element 13, or by adjusting the interpupillary distance The operation of the mechanism 100 drives the first display assembly 12 to slide in the second direction D2 and drives the second display assembly 13 to slide in the first direction D1 to increase the distance between the first display assembly 12 and the second display assembly 13.

Fig. 2 is a schematic diagram of the first display assembly, the second display assembly and the pupil distance adjustment mechanism of Fig. 1. 3 is a schematic diagram of the first display assembly, the second display assembly, and the pupil distance adjusting mechanism of FIG. 2 after being converted to another state. 4 is a schematic diagram of the interpupillary distance adjustment mechanism of FIG. 2 in other viewing angles. FIG. 5 is a schematic diagram of the interpupillary distance adjustment mechanism of FIG. 3 in other viewing angles. 1 and 2, in this embodiment, the pupil distance adjustment mechanism 100 includes a screw 110, a positioning gear 120, a first driven gear 130, a driving rod 140, a driving gear 150, a driven rod 160, and a second slave In the movable gear 170, the screw 110 is screwed to the first display assembly 12 and the second display assembly 13, and the screw 110 has a degree of freedom of movement to rotate around the first axis X1. On the other hand, the first direction D1, the second direction D2, and the first axis X1 are parallel to each other.

Specifically, the rotation of the screw 110 can be used to drive the first display assembly 12 and the second display assembly 13 to slide in two different directions, that is, the forward or reverse rotation of the screw 110 can be used to increase or decrease the first display assembly 12 The distance from the second display assembly 13. In terms of the screw connection relationship between the screw 110 and the first display assembly 12 and the screw connection relationship between the screw 110 and the second display assembly 13, the first display assembly 12 includes a first screw connection portion 12a, and the second display assembly 13 includes a parallel connection. The second screw connection portion 13a at the first screw connection portion 12a. The screw 110 passes through the first screw connection portion 12a and the second screw connection portion 13a, and the screw 110 includes a first screw portion 111 screwing the first screw connection portion 12a and a second screw portion screwing the second screw connection 13a 112. The first threaded portion 111 has an external thread that matches with the internal thread of the first threaded portion 12a, and the second threaded portion 112 has an external thread that matches with the internal thread of the second threaded portion 13a. On the other hand, the rotation direction of the external thread of the first threaded portion 111 is opposite to the rotation direction of the external thread of the second threaded portion 112 to ensure that the first display assembly 12 and the second display assembly 13 driven by the screw 110 go two ways. Slide in different directions.

The first driven gear 130 and the positioning gear 120 are sleeved on the screw 110. On the first axis X1, the first threaded portion 111 is located between the first driven gear 130 and the second threaded portion 112, and the first driven The gear 130 is located between the first threaded portion 111 and the positioning gear 120. On the other hand, the driving rod 140 is parallel to the screw 110 and includes a driving clamping portion 141. The driven rod 160 is parallel to the screw 110 and is aligned with the driving rod 140 on the second axis X2. The second axis X2 is parallel to the first axis X1, the driving rod 140 and the driven rod 160 both have the freedom of movement to rotate around the second axis X2, and the driving rod 140 has the freedom of movement to slide along the second axis X2.

The driven rod 160 includes a driven clamping portion 161, and the driving clamping portion 141 is aligned with the driven clamping portion 161 on the second axis X2. On the other hand, the second driven gear 170 is sleeved on the driven rod 160, wherein the second driven gear 170 is engaged with the first driven gear 130, and the driving engaging portion 141 and the driven engaging portion 161 are in the driving position. Between the gear 150 and the second driven gear 170. In the state shown in FIGS. 2 and 4, the driving gear 150 is engaged with the positioning gear 120, and the driving engaging portion 141 is separated from the driven engaging portion 161. At this time, the driving rod 140 cannot go around the second axis temporarily. X2 rotation. On the other hand, the driving engaging portion 141 has a protrusion 141a facing the driven engaging portion 161, and the driven engaging portion 161 has a engaging groove 161a facing the driving engaging portion 141, which can be ensured by the assistance of the positioning gear 120 The protrusion 141a is aligned with the groove 161a on the second axis X2.

Next, move the driving engaging portion 141 to the driven engaging portion 161, as the engaging projection 141a is aligned with the engaging groove 161a on the second axis X2, and the geometrical contours of the engaging projection 141a and the engaging groove 161a are complementary. When the portion 141 is clamped to the driven clamping portion 161, the clamping protrusion 141a is inserted into the clamping slot 161a, as shown in FIGS. 3 and 5. At this time, the drive gear 150 is separated from the positioning gear 120, and after the engagement relationship between the drive engaging portion 141 and the driven engaging portion 161 is established, the drive rod 140 can rotate around the second axis X2 to drive the card The connecting portion 141 drives the driven clamping portion 161 to allow the driven rod 160 and the second driven gear 170 to rotate synchronously. At the same time, the second driven gear 170 drives the first driven gear 130 so that the screw 110 and the positioning gear 120 rotate synchronously. In the state where the driving gear 150 is separated from the positioning gear 120, the rotation of the driving gear 150 is synchronized with the rotation of the positioning gear 120, and the driving engaging portion 141 is moved away from the driven engaging portion 161 and the driving gear 150 After meshing with the positioning gear 120 again, with the assistance of the positioning gear 120, it can be ensured that the protrusion 141a is aligned with the groove 161a on the second axis X2, as shown in FIGS. 2 and 4.

1 to 5, in this embodiment, the interpupillary distance adjustment mechanism 100 further includes a sleeve 180, wherein the driving rod 140 passes through the sleeve 180, and the driving clamping portion 141 and the driving gear 150 are located in the sleeve 180 outer. The sleeve 180 can be used to prevent the drive rod 140 from deflection. Specifically, the sleeve 180 has a communicating opening 181, a groove 182 and a through hole 183, and the groove 182 is located between the opening 181 and the through hole 183. The driving rod 140 passes through the opening 181, the groove 182 and the through hole 183. The driving rod 140 further includes a power clamping portion 142, and the driving gear 150 is located between the power clamping portion 142 and the driving clamping portion 141. The power clamping portion 142 is adjacent to the opening 181 and located outside the opening 181. The driving gear 150 and the driving clamping portion 141 are adjacent to the through hole 183 and located outside the through hole 183.

On the other hand, the interpupillary distance adjustment mechanism 100 further includes a power input member 101 that is clamped to the power clamping portion 142. The part of the power input 101 is located outside the housing 11. The power source of the power input 101 can be manual, semi-automatic or fully automatic. Taking a semi-automatic or fully automatic power source as an example, the power input 101 can be the output shaft of the motor. . Therefore, when the power input 101 is operating, the drive rod 140 is driven by the power input 101, after the drive gear 150 is separated from the positioning gear 120 and the engagement relationship between the drive engaging portion 141 and the driven engaging portion 161 is established , The driving rod 140 can rotate around the second axis X2, so that the driving engaging portion 141 drives the driven engaging portion 161 so that the driven rod 160 and the second driven gear 170 rotate synchronously. At the same time, the second driven gear 170 drives the first driven gear 130 to rotate the screw 110.

The driving rod 140 further includes a limiting portion 143 located between the power clamping portion 142 and the driving clamping portion 141, and the limiting portion 143 is configured to move into the groove 182 from the opening 181. On the other hand, the interpupillary distance adjustment mechanism 100 further includes a spring 102, wherein the spring 102 can be a compression spring and is disposed in the groove 182. The spring 102 is located between the limiting portion 143 and the through hole 183, and the driving rod 140 passes through the spring 102. When the driving rod 140 slides toward the driven rod 160, the limiting portion 143 moves from the opening 181 into the groove 182, and the spring 102 is compressed by the limiting portion 143 to store elastic potential energy. Once the force that pushes the driving rod 140 to slide toward the driven rod 160 is removed, the elastic restoring force of the spring 102 can drive the limiting portion 143 to slide the driving rod 140 away from the driven rod 160.

On the other hand, the interpupillary distance adjusting mechanism 100 further includes two positioning plates 103, which are pivoted on the sleeve 180 and located on both sides of the limiting portion 143. The sleeve 180 also has two through grooves 184 adjacent to the opening 181, each through groove 184 is connected to the groove 182, and each through groove 184 is used to accommodate a positioning portion 103 a of the positioning plate 103. Specifically, the positioning portion 103a of each positioning plate 103 extends into the groove 182 through the corresponding slot 184, and moves into the limiting portion 143 of the groove 182 from the opening 181 and the two positioning portions of the two positioning plates 103 The contact 103a drives the two positioning plates 103 to rotate relative to the sleeve 180.

In this embodiment, the interpupillary distance adjustment mechanism 100 further includes two elastic pieces 104, which are respectively arranged corresponding to the two positioning plates 103, and the first end 104a and the second end 104b of each elastic piece 104 are respectively fixed to the corresponding positioning plate 103 and Sleeve 180. Specifically, after the two positioning plates 103 are pushed by the restricted portions 143 to rotate relative to the sleeve 180, the two elastic pieces 104 are driven by the two positioning plates 103 to be elastically deformed. At this time, the two elastic pieces 104 constantly drive the two positioning plates 103 to buckle against the limiting portion 143 to locate the position of the limiting portion 143, thereby ensuring the engagement between the driving engaging portion 141 and the driven engaging portion 161 relationship.

In summary, the head-mounted display device of the present invention can adjust the distance between the first display component and the second display component through the operation of the pupil distance adjustment mechanism, so as to achieve the purpose of accurately adjusting the pupil distance, that is, The interpupillary distance adjustment mechanism of the head-mounted display device of the present invention has excellent operational reliability and stability. Furthermore, the power source for the operation of the interpupillary distance adjustment mechanism can be manual, semi-automatic or fully automatic. Before the interpupillary distance adjustment mechanism drives the first display assembly and the second display assembly to slide in two different directions, the driving gear must be released. The meshing relationship with the positioning gear, and the driving rod is clamped to the driven rod, and then power is input to the driving rod to rotate the driving rod and the driven rod synchronously. At this time, the second driven gear rotates with the driven rod, And the first driven gear is driven by the second driven gear, the screw and the first driven gear rotate synchronously, and the screw drives the first display assembly and the second display assembly to slide in two different directions. The above operation process is clear, so it can avoid the situation of misadjustment of the interpupillary distance.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make slight changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to those defined by the attached patent scope.

10: Head-mounted display device 11: Chassis 11a: window area 12: The first display component 12a: The first screw connection 13: The second display component 13a: Second screw connection 100: Interpupillary distance adjustment mechanism 101: Power input 102: spring 103: positioning board 103a: Positioning part 104: shrapnel 104a: first end 104b: second end 110: screw 111: The first thread 112: Second thread 120: positioning gear 130: The first driven gear 140: drive rod 141: Drive card connector 141a: Card convex 142: Power Card Connector 143: Limit 150: drive gear 160: driven rod 161: driven card connector 161a: card slot 170: second driven gear 180: sleeve 181: open 182: Groove 183: Piercing 184: piercing D1: First direction D2: second direction X1: the first axis X2: first axis

FIG. 1 is a schematic diagram of a head-mounted display device according to an embodiment of the invention. Fig. 2 is a schematic diagram of the first display assembly, the second display assembly and the pupil distance adjustment mechanism of Fig. 1. 3 is a schematic diagram of the first display assembly, the second display assembly, and the pupil distance adjusting mechanism of FIG. 2 after being converted to another state. 4 is a schematic diagram of the interpupillary distance adjustment mechanism of FIG. 2 in other viewing angles. FIG. 5 is a schematic diagram of the interpupillary distance adjustment mechanism of FIG. 3 in other viewing angles.

10: Head-mounted display device

11: Chassis

11a: window area

12: The first display component

12a: The first screw connection

13: The second display component

13a: Second screw connection

100: Interpupillary distance adjustment mechanism

101: Power input

103: positioning board

110: screw

111: The first thread

112: Second thread

120: positioning gear

130: The first driven gear

141: Drive card connector

142: Power Card Connector

143: Limit

150: drive gear

160: driven rod

161: driven card connector

170: second driven gear

180: sleeve

D1: First direction

D2: second direction

X1: the first axis

X2: first axis

Claims (11)

A head-mounted display device includes: chassis; The first display component is arranged in the casing; The second display component is arranged in the casing; and The interpupillary distance adjustment mechanism is arranged in the casing, and the interpupillary distance adjustment mechanism includes: A screw threadedly connects the first display component and the second display component; The first driven gear is sleeved on the screw; Positioning gear, sleeved on the screw; The drive rod is parallel to the screw and includes a drive clamping part; Drive gear, sleeved on the drive rod; The driven rod is parallel to the screw rod and aligned with the drive rod on the axis, wherein the driven rod includes a driven clamping part; and The second driven gear is sleeved on the driven rod, wherein the second driven gear is meshed with the first driven gear, and the drive clamping portion and the driven clamping part are between the drive gear and the first driven gear. Between the two driven gears, The driving clamping portion is aligned with the driven clamping portion on the axis, the driving gear is engaged with the positioning gear and the driving clamping portion is separated from the driven clamping portion, or, the driving gear and the driven clamping portion The positioning gear is separated and the driving clamping part is clamped to the driven clamping part. According to the head-mounted display device described in claim 1, wherein the first display assembly includes a first screw connection portion, and the second display assembly includes a second screw connection portion, and the screw passes through the first screw connection Part and the second screw connection part, and the screw includes a first screw part screwing the first screw connection part and a second screw part screwing the second screw connection part. According to the head-mounted display device described in item 2 of the scope of patent application, the first threaded portion is between the first driven gear and the second threaded portion, and the first driven gear is positioned between the positioning gear and the positioning gear. Between the first threaded portion. The head-mounted display device according to the first item of the scope of patent application, wherein the driving engaging portion has a protrusion facing the driven engaging portion, and the driven engaging portion has a groove facing the driving engaging portion , The card protrusion is aligned with the card slot on the axis, and the geometric profile of the card protrusion and the card slot are complementary. According to the head-mounted display device described in claim 1, wherein the interpupillary distance adjustment mechanism further includes a sleeve, the driving rod passes through the sleeve, and the driving clamping portion and the driving gear are located in the sleeve outer. The head-mounted display device according to the fifth item of the scope of patent application, wherein the sleeve has a communicating opening, a groove and a perforation, and the groove is located between the opening and the perforation, and the driving rod passes through the The opening, the groove and the perforation, wherein the driving rod further includes a power clamping portion, and the driving gear is located between the power clamping portion and the driving clamping portion, and the power clamping portion is outside the opening, And the driving gear and the driving clamping part are outside the perforation. According to the head-mounted display device described in item 6 of the scope of patent application, wherein the driving rod further includes a limiting portion located between the power clamping portion and the driving clamping portion, and the limiting portion is configured to automatically The opening moves into the groove, and the interpupillary distance adjusting mechanism further includes a spring, wherein the spring is arranged in the groove, and the spring is located between the limiting portion and the perforation. For the head-mounted display device described in item 7 of the scope of patent application, the interpupillary distance adjustment mechanism further includes two positioning plates, pivoted on the sleeve and located on both sides of the limiting part, wherein the sleeve The barrel also has two through grooves adjacent to the opening, and each through groove is used to accommodate a positioning portion of the positioning plate. According to the head-mounted display device described in item 8 of the scope of patent application, the positioning portion of each positioning plate extends into the groove through the corresponding through slot, and moves into the limit of the groove from the opening The part is in contact with the two positioning parts. For the head-mounted display device described in item 8 of the scope of patent application, the interpupillary distance adjustment mechanism further includes two elastic pieces corresponding to the two positioning plates, and two ends of each elastic piece are respectively fixed to the corresponding positioning plate With the sleeve. According to the head-mounted display device described in item 6 of the scope of patent application, the interpupillary distance adjustment mechanism further includes a power input member, which is clamped to the power clamping portion, and a part of the power input member is located outside the housing.

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