TWI646355B - Head-mounted display and adjusting method of the same - Google Patents

Abstract

The present invention provides a head mounted display including a display screen, a first lens and a second lens disposed between the display screen and a user's eyes, a reference object disposed on the display screen and the Between the eyes of the user, an image capturing device is used for capturing images of the user's eyes and the reference object, and a processing device is obtained according to the images of the user's eyes and the reference object. And the adjusting device is configured to adjust the positions of the first and second lenses according to the distance between the eyes of the user.

Description

Head mounted display and adjustment method

The present invention relates to a head mounted display, and more particularly to a head mounted display that automatically adjusts the position of the internal lens of the display.

A head-mounted display is a display device commonly used in virtual reality applications. In a typical design, a display screen in a head-mounted display screens the displayed content to display different contents on the left and right sides of the display screen, so the head A two-lens lens is also provided in the wearable display to adjust the position of the user's eyes. Therefore, if the lens adjusts the user's gaze position to an incorrect position, it may cause a poor visual effect or even a user's physical discomfort. Therefore, the general head-mounted display has a design that can adjust its internal lens. A common adjustment method is: the user manually adjusts the position of the lens by an adjustment device, or inputs relevant information through the computer before using the helmet (such as the user's eyes or the position of the eyes), and the head-mounted type The display automatically adjusts the position of the lens based on the information. However, whether the user manually adjusts or adjusts the information through the user's book, the position of the lens can be adjusted by the user's additional actions or input data, rather than fully automated adjustment.

In order to solve the above problems, the present invention provides a head mounted display that automatically adjusts the position of its internal lens. Head-mounted display provided by an embodiment of the present invention The display device includes a display screen, a first lens and a second lens disposed between the display screen and a user's eyes, and a reference object disposed on the display screen and the user's eyes An image capturing device for capturing images of the user's eyes and the reference object, and a processing device, according to the user's eyes and the image of the reference object, the user's double An eyelid distance; and an adjusting device that adjusts the positions of the first and second lenses according to the user's binocular distance.

The head mounted display, wherein the control device adjusts the positions of the first lens and the second lens such that a line connecting the lens center of the first lens and the left eye pupil of the user is perpendicular to a plane of the display screen And connecting the center of the lens of the second lens to the pupil of the right eye of the user perpendicular to the plane of the display screen.

A head mounted display as described above, wherein the processing device calculates the distance between the eyes of the user based on the relative size of the reference object.

A head mounted display as described above, wherein the reference object is disposed at a position equal to a distance between a left eye and a right eye of the user.

A head mounted display as described above, wherein the reference object is a bar code.

Another embodiment of the present invention provides a lens adjustment method, which is applicable to a headset including a display screen, a first lens, a second lens, a reference object, an image capturing device, a processing device, and an adjusting device. monitor. The lens adjustment method includes: capturing an image of the user's eyes and the reference object through the image capturing device; and transmitting, according to the processing device, the image of the user's eyes and the reference object The user's binocular distance; Through the adjusting device, the positions of the first and second lenses are adjusted according to the distance between the eyes of the user.

The lens adjustment method as described above, wherein the control device adjusts the positions of the first lens and the second lens such that a line connecting the lens center of the first lens and the left eye pupil of the user is perpendicular to a plane of the display screen; And connecting the center of the lens of the second lens to the pupil of the right eye of the user perpendicular to the plane of the display screen.

The lens adjustment method as described above, wherein the processing device calculates the distance between the eyes of the user based on the relative size of the reference object.

The lens adjustment method as described above, wherein the reference object is disposed at a position equal to a distance between the left eye and the right eye of the user.

100‧‧‧ head mounted display

102‧‧‧ display screen

104a‧‧‧first lens

104b‧‧‧second lens

106‧‧‧Reference objects

108‧‧‧Influenced extraction device

110‧‧‧Processing device

112‧‧‧Adjustment device

120a‧‧‧User left eye

120b‧‧‧user right eye

200‧‧‧ images

400‧‧‧ method

402-406‧‧‧Steps

1A is a block diagram of a system of a head mounted display in accordance with an embodiment of the present invention.

FIG. 1B is a schematic diagram showing the relative positions of the lens and the reference object in the head mounted display according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of an image captured by an image capturing device in a head mounted display according to an embodiment of the invention.

Figure 3 is a schematic illustration of the correct position of the user's eyes and the first and second lenses.

4 is a flow chart showing a lens adjustment mode of a head mounted display according to an embodiment of the present invention.

1A is a block diagram of a system of a head mounted display in accordance with an embodiment of the present invention. The head mounted display 100 includes a display screen 102, a first lens 104a, a second lens 104b, a reference object 106, an image capturing device 108, a processing device 110, and an adjusting device 112.

In this embodiment, the display screen 102 is a flat display, but is not limited thereto. For example, the display screen 102 can also be a translucent display screen with optical projection technology. In a preferred embodiment, the display screen 102 can split the displayed content to display different content on the left and right halves of the display screen 102. In another embodiment, the display screen 102 can be composed of two separate screens, and the separate screens can respectively display different contents.

The first lens 104a and the second lens 104b are disposed at a position between the display screen 102 and the eyes of the user, and the position thereof is adjustable to provide a good user experience. In a preferred embodiment, the connection between the center of the pupil of the left eye 120a of the user and the center of the lens of the first lens 104a is perpendicular to the plane of the display screen 102. Similarly, the connection between the center of the pupil of the right eye 120b and the center of the second lens 104b is perpendicular to the plane of the display screen 102; at this time, the distance between the lens center of the first lens 104a and the lens center of the second lens 104b is also It is equivalent to the distance between the eyes of the user.

The reference object 106 is disposed at a position substantially equal to the distance between the left eye 120a and the right eye 120b of the user, respectively. In this embodiment, the reference object 106 is disposed inside the head mounted display 100 and is substantially in the same plane as the first lens and the second lens. In a preferred embodiment, the reference object 106 can be a two-dimensional barcode, but is not limited thereto, as long as it is a well-identified image. The advantage of using a two-dimensional barcode is that the two-dimensional graphics code is easier to be recognized by the computer. Furthermore, the relative position and size of other objects in the image can be determined by the size thereof, thereby facilitating subsequent calculation of the user's binocular distance.

FIG. 1B is a schematic diagram showing the relative positions of the first lens 104a, the second lens 104b and the reference object 106 in the head mounted display 100 according to an embodiment of the present invention. In this embodiment, the first lens 104a, the second lens 104b and the reference object 106 are all disposed in the same planar structure 120, and both the first lens 104a and the second lens 104b are located at preset positions before adjustment. The reference object 106 is disposed directly above the midpoint of the lens center line of the first lens 104a and the second lens 104b, so the distance between the reference object 106 and the lens center of the first lens 104a and the lens center of the second lens 104b. The same is true. When the user wears the head mounted display 100, the first lens 104a and the second lens 104b are respectively located in front of the left and right eyes of the user, so that the distance between the reference object 106 and the left eye and the right eye of the user is substantially equal. .

The image capturing device 108 captures the image of the reference object 106 and the left eye 120a and the right eye 120b of the user, and transmits the image to the processing device 110. In this embodiment, the image capturing device 108 is a miniature camera, but is not limited thereto, and any device that can clearly capture the image of the reference object 106 and the left eye 120a and the right eye 120b of the user may be used. The processing device 110 determines the distance between the eyes of the user according to the size of the reference object 106 in the image and the positions of the left eye 120a and the right eye 120b of the user. In a preferred embodiment, the processing device 110 first determines the position and size of the reference object 106 in the image, and determines the distance between the eyes of the user based on the width of the reference object 106 in the image.

2 is a schematic diagram of an image captured by an image capturing device 108. In FIG. 2, the image 200 is an image captured by an image capturing device 108. The processing device 110 calculates the pupil distance between the eyes of the user according to the width of the reference object 106 in the image 200. In the example of the image 200, the processing device 110 can obtain the width of the user's eyes by the width of the reference object 106 according to the size of the reference object 106 (such as the 10 dotted squares of FIG. 2 and the reference object 106). Width shown).

After the processing device 110 determines the distance between the eyes of the user, the drive adjusting device 112 adjusts the positions of the first lens 104a and the second lens 104b according to the user's binocular distance. The adjustment device 112 can be a device having a micro motor and gear and can adjust the position of the first lens 104a and the second lens 104b within the head mounted display 100. In a preferred embodiment, the adjusting device 112 adjusts the positions of the first lens 104a and the second lens 104b such that the line connecting the center of the pupil of the left eye 120a and the lens center of the first lens 104a is perpendicular to the display screen 102. a plane; and connecting the center of the pupil of the right eye 120b to the center of the second lens 104b perpendicular to the plane of the display screen 102; and at this time, the distance between the lens center of the first lens 104a and the lens center of the second lens 104b It will also be equivalent to the distance between the eyes of the user.

Figure 3 is a schematic view showing the position of the user's eyes and the second lens 104b of the first lens 104a after the adjustment is completed. In FIG. 3, the line connecting the center of the pupil of the left eye 120a of the user to the lens center of the first lens 104a is perpendicular to the plane of the display screen 102; the connection between the center of the pupil of the right eye 120b and the center of the second lens 104b. It is perpendicular to the plane of the display screen 102; and at this time, the distance between the lens center of the first lens 104a and the lens center of the second lens 104b is also equivalent to the pupil distance between the eyes of the user.

It should be noted that the processing device 110 can also be used according to different applications. The adjusting device 112 adjusts the positions of the first lens 104a and the second lens 104b. For example, the processing device 110 can adjust the position of the first lens 104a so that the center of the pupil of the left eye 120a of the user, the lens center of the first lens 104a, and the display screen 102 The center is aligned; the position of the second lens 104b is adjusted such that the center of the pupil of the right eye 120b and the center of the lens of the second lens 104b are aligned with the center of the display screen 102.

Fig. 4 is a view showing a method of adjusting a head mounted display according to another embodiment of the present invention, which is suitable for a head mounted display as described above. The method 400 begins in step 402 by the image capturing device 108 capturing an image including the reference object 106, the image of the user's left eye 120a and the user's right eye 120b.

In step 404, the processing device 110 determines the position of the user's left eye 120a pupil and the user's right eye 120b and the pupil distance according to the image captured in step 402. In a preferred embodiment, the processing device 110 determines the distance between the pupil of the left eye 120a of the user and the pupil of the right eye 120b of the user according to the width of the reference object 106 in the image.

In step 406, the adjusting device 112 adjusts the positions of the first lens 104a and the second lens 104b according to the user's binocular distance calculated by the processing device 110. In a preferred embodiment, the adjusting device 112 adjusts the positions of the first lens 104a and the second lens 104b such that the line connecting the center of the pupil of the left eye 120a and the lens center of the first lens 104a is perpendicular to the plane of the display screen 102. And the line connecting the center of the pupil of the right eye 120b and the center of the second lens 104b is perpendicular to the plane of the display screen 102.

In another embodiment, the processing device 110 can adjust the position of the first lens 104a such that the center of the pupil of the left eye 120a of the user, the lens center of the first lens 104a is aligned with the center of the display screen 102; and the second lens 104b is adjusted. The position is such that the center of the pupil of the right eye 120b and the center of the lens of the second lens 104b are aligned with the center of the display screen 102.

The specifications and illustrations of this specification are intended to be illustrative and not limiting. However, it should be sufficient to teach the skilled artisan to make some changes and refinements without departing from the spirit and scope of the invention and the scope of the patent application.

Claims (7)

A head-mounted display, comprising: a display screen, a first lens and a second lens disposed between the display screen and a user's eyes, a reference object disposed on the display screen and the user Between the eyes, an image capturing device for capturing images of the user's eyes and the reference object; a processing device according to the user's eyes and the reference object image a user's binocular distance; and an adjusting device for adjusting the position of the first lens and the second lens according to the user's binocular distance; wherein the processing device has a relative size of the reference object Benchmark, the user's binocular distance is calculated. The head-mounted display of claim 1, wherein the adjusting device adjusts the positions of the first lens and the second lens to connect the lens center of the first lens to the left eye pupil of the user. Straight to the plane of the display screen; and the line connecting the lens center of the second lens and the user's right eye pupil is perpendicular to the plane of the display screen. The head-mounted display of claim 1, wherein the reference object is disposed at a position equal to a distance between the left eye and the right eye of the user. The head mounted display of claim 1, wherein the reference object is a barcode. A lens adjustment method is applicable to a head mounted display including a display screen, a first lens, a second lens, a reference object, an image capturing device, a processing device and an adjusting device, wherein the lens adjusting manner comprises Obtaining an image of the user's eyes and the reference object through the image capturing device; and the user's eyes are obtained according to the image of the user's eyes and the reference object through the processing device And adjusting the position of the first lens and the second lens according to the user's binocular distance according to the foregoing adjusting device; wherein the processing device calculates the relative size of the reference object as a reference The user's eyes are separated. The lens adjustment method of claim 5, wherein the adjusting device adjusts a position of the first lens and the second lens such that a lens center of the first lens is perpendicular to a line connecting the user's left eye pupil In the plane of the display screen; and connecting the center of the lens of the second lens to the pupil of the right eye of the user is perpendicular to the plane of the display screen. The lens adjustment method according to claim 5, wherein the reference object is disposed at a position equal to a distance between the left eye and the right eye of the user.