TWI848311B - Image sensing device and head-mounted display - Google Patents

Abstract

An image sensing device including a plurality of lens group, a connector, a plurality of antenna elements and a plurality of image sensing element is provided. Each lens group includes a plurality of lens elements arranged along an optical axis from the minified side to the magnified side. The connector is connected between the lens groups. The connector includes a plurality of first parts and a plurality of second parts. The second parts are connected between the first parts, wherein the dielectric constants of the second parts are greater than the dielectric constants of the first parts. The antenna elements are respectively disposed on the first parts for providing a plurality of sensing beams to a target area toward the magnified side. The image sensing elements are respectively disposed on a side of lens groups facing the minified side for sensing a reflected light beam of the target area. In addition, a head-mounted display device is also provided.

Description

Image sensing device and head mounted display device

The present invention relates to an electronic device, and in particular to an image sensing device and a head-mounted display device.

As the technology industry develops, the types, functions and usage of electronic devices are becoming more and more diverse, and wearable electronic devices that can be directly worn on the user's body have also emerged. There are many types of head-mounted electronic devices. For example, head-mounted electronic devices such as eye masks can not only see three-dimensional images after users wear such electronic devices, but the images will also change as the user's head turns, providing users with a more immersive experience.

However, in the current design of head-mounted electronic devices, the modules with various functions in the structure have resulted in the high volume of head-mounted electronic devices. In addition, the current development also has the problem that the coverage range of the radar beam or the diversity characteristics of the radar beam are limited by the limited number of antenna array elements, and the problem that the image and radar sensors need to be configured at the same time at specific locations on the head-mounted electronic device.

The present invention provides an image sensing device and a head-mounted display device, which can integrate the antenna and the image sensing element into a single module to form an optimal sensing position and increase different beam directions, or increase different scanning ranges and areas. The image sensing device of the present invention can be used in head-mounted display devices, vehicle devices, robots or drones. Augmented reality or virtual reality accessories will also be equipped with the image sensing device of the present invention, such as controllers, bracelets, and rings; in addition, devices with spatial recognition requirements may also be equipped with the image sensing device of the present invention.

The present invention provides an image sensing device, comprising a plurality of lens groups, a connector, a plurality of antenna elements and a plurality of image sensing elements. Each lens group comprises a plurality of lens elements arranged along an optical axis. The connector is connected between the plurality of lens groups. The connector comprises a plurality of first parts and a plurality of second parts. The plurality of second parts are connected between the plurality of first parts. The plurality of antenna elements are respectively arranged on the plurality of first parts to provide a plurality of sensing beams to a target area toward a first side. The plurality of image sensing elements are respectively arranged on a side of the plurality of lens groups facing the second side to sense the reflected light beam of the target area, wherein the direction of the second side is opposite to the direction of the first side.

The present invention further provides a head-mounted display, including an image sensing device and a display. The image sensing device includes a plurality of lens groups, a connector, a plurality of antenna elements, and a plurality of image sensing elements. Each lens group includes a plurality of lens elements arranged along an optical axis. The connector is connected between the plurality of lens groups. The connector includes a plurality of first parts and a plurality of second parts. The plurality of second parts are connected between the plurality of first parts. The plurality of antenna elements are respectively arranged on the plurality of first parts to provide a plurality of sensing beams to a target area toward a first side. The plurality of image sensing elements are respectively arranged on a side of the plurality of lens groups facing the second side to sense the reflected light beam of the target area, wherein the direction of the second side is opposite to the direction of the first side. The head mounted display includes a main board, and the image sensor device is coupled to the main board via a signal line.

The present invention also provides an image sensing device, including a lens assembly, a plurality of antenna elements, and an image sensing element. The lens assembly includes a plurality of lens elements arranged along an optical axis. The plurality of antenna elements are arranged on the second side of the lens assembly to provide a plurality of sensing beams to a target area. The plurality of antenna elements are located at different relative positions of the lens assembly. The image sensing element is arranged on the second side of the lens assembly to sense the reflected light beam of the target area.

The present invention further provides a head-mounted display, including an image sensing device and a display. The image sensing device includes a lens group, a plurality of antenna elements and an image sensing element. The lens group includes a plurality of lens elements arranged along an optical axis. The plurality of antenna elements are arranged on the second side of the lens group to provide a plurality of sensing beams to a target area. The plurality of antenna elements are located at different relative positions of the lens group. The image sensing element is arranged on the second side of the lens group to sense the reflected light beam of the target area. The display is electrically connected to the image sensing device.

Based on the above, in the image sensing device and head-mounted display of the present invention, the image sensing device includes a lens set, a plurality of antenna elements and an image sensing element. Among them, the sensing beams provided by the plurality of antenna elements are transmitted through the lens set to the target area to form a scanning beam, and the reflected light beam reflected by the target area is transmitted through the lens set to the image sensing element. Therefore, by configuring the plurality of antenna elements adjacent to the lens set, the reflected light beam provided by the target area and the sensing beam provided by the plurality of antenna elements can share the lens set, and then can be integrated into a single module that can be configured at the optimal sensing position, while saving the device volume. In addition, by configuring the position adjuster to move the lens set, an optical vibration-proof effect can be provided and different beam directions can be added to the scanning beam, or different scanning ranges and areas can be added.

In order to make the above features and advantages of the present invention more clearly understood, the following is a detailed description of the embodiments with the accompanying drawings.

10: User

20: Target area

50: Head-mounted display device

100,100A: Image sensing device

110: Lens set

112: Lens element

120: Connectors

122: Part 1

124: Part 2

130: Antenna components

140: Image sensor element

200: Display

A1: First side

A2: Second side

B: Scanning beam

F: Reference plane

I: Optical axis

L1: reflected beam

L2: Sensing beam

Figure 1 is a schematic diagram of a head-mounted display device according to an embodiment of the present invention.

FIG2 is a schematic diagram of the image sensing device of FIG1 during optical sensing.

FIG3 is a schematic diagram of the image sensing device of FIG1 when performing beam scanning.

Figure 4 is a schematic diagram of a head-mounted display device of another embodiment of the present invention.

FIG5 is a schematic diagram of the image sensing device of FIG4 during optical sensing.

FIG6 is a schematic diagram of the image sensing device of FIG4 when performing beam scanning.

FIG1 is a schematic diagram of a head-mounted display device of an embodiment of the present invention. Please refer to FIG1. An embodiment of the present invention provides a head-mounted display device 50, which allows a user 10 to wear and experience the effects of virtual reality, augmented reality or mixed reality. In this embodiment, the head-mounted display device 50 includes an image sensing device 100 and a display 200. The image sensing device 100 is used to sense the target area 20, and the display 200 is electrically connected to the image sensing device 100 to generate an image screen according to the sensing result of the image sensing device 100.

FIG2 is a schematic diagram of the image sensing device of FIG1 when performing optical sensing. FIG3 is a schematic diagram of the image sensing device of FIG1 when performing beam scanning. Please refer to FIG1 to FIG3. The image sensing device includes a plurality of lens groups 110, a connector 120, a plurality of antenna elements 130, and a plurality of image sensing elements 140. In the present embodiment, the number of lens groups 110 is, for example, two, and they are arranged in a direction perpendicular to the optical axis I, but the present invention is not limited thereto. In detail, each lens group 110 includes a plurality of lens elements 112 arranged along the optical axis I. For example, each lens group 110 includes a combination of one or more optical lenses with refractive power, such as various combinations of non-planar lenses such as biconcave lenses, biconvex lenses, concave-convex lenses, convex-concave lenses, plano-convex lenses, and plano-concave lenses. In this embodiment, the optical imaging range of the multiple lens elements 112 in each lens group 110 on the optical axis I gradually increases from the first side A1 to the second side A2, as shown in FIG. 2.

The connecting member 120 is connected between the plurality of lens groups 110. The connecting member includes a plurality of first parts 122 and a plurality of second parts 124. The plurality of second parts 124 are connected between the plurality of first parts 122; and as shown in FIG. 2 , the thickness of the plurality of second parts 124 is greater than the thickness of the plurality of first parts 122, so the dielectric constant of the plurality of second parts 124 is greater than the dielectric constant of the plurality of first parts 122. However, the thickness of the plurality of second parts 124 may also be less than the thickness of the plurality of first parts 122, so the dielectric constant of the plurality of second parts 124 may also be less than the dielectric constant of the plurality of first parts 122. For example, in this embodiment, the connector 120 is an optical lens, and the thickness of the plurality of first portions 122 in the direction of the optical axis I is less than the thickness of the plurality of second portions 124 in the direction of the optical axis I. Specifically, in this embodiment, the connector 120 is connected to a side of the plurality of lens assemblies 110 facing the first side A1.

The plurality of image sensing elements 140 are respectively arranged on the side of the plurality of lens groups 110 facing the second side A2, wherein the number of the plurality of image sensing elements 140 is the same as the number of the plurality of lens groups 110. The plurality of image sensing elements 140 are used to sense the reflected light beam L1 of the target area 20, thereby optically imaging the facial features of the target area 20 of the user 10. Specifically, the reflected light beam L1 emitted by the target area 20 is transmitted from the first side A1 to the second side A2 through the lens group 110 to the image sensing element 150.

The plurality of antenna elements 130 are respectively arranged in the plurality of first parts 122 to provide the plurality of sensing beams L2 to the target area 20 toward the first side A1. Specifically, in this embodiment, the number of the plurality of antenna elements 130 is the same as the number of the plurality of first parts 122, and the antenna elements 130 are respectively arranged at a side of the corresponding first part 122 toward the second side A2. However, the present invention does not limit the number of antenna elements 130 and the number of first parts 122. In other words, the plurality of antenna elements 130 provide the plurality of sensing beams L2 toward the plurality of first parts 122 to form a scanning beam B in the target area 20. It is worth mentioning that, since the plurality of second parts 124 are arranged adjacent to the first part 122, part of the sensing beam L2 will be deflected toward the plurality of second parts 124 with a larger dielectric constant, thereby increasing the scanning range of the formed scanning beam B, as shown in FIG3. In this way, the viewing angle range of the sensing beam L2 can be further improved when the user 10's face is close, thereby achieving a good sensing effect. On the other hand, by arranging the plurality of antenna elements 130 adjacent to the lens set 110, the reflected light beam L1 provided by the target area 20 and the sensing beam L2 provided by the plurality of antenna elements 130 can share the lens set 110, as shown in FIG2 and FIG3 respectively, thereby being integrated into a single module to form an optimal sensing position, while saving the device volume.

FIG4 is a schematic diagram of a head-mounted display device of another embodiment of the present invention. FIG5 is a schematic diagram of the image sensing device of the image sensing device of FIG4 when performing optical sensing. FIG6 is a schematic diagram of the image sensing device of the image sensing device of FIG4 when performing beam scanning. Please refer to FIG4 to FIG6. The head-mounted display device 200 and the image sensing device 100A of this embodiment are similar to the head-mounted display device 200 and the image sensing device 100 shown in FIG1 to FIG3. The difference between the two is that, in this embodiment, the lens group 110 and the image sensing element 140 of the image sensing device 100 are only provided in a single group, and the connector 120 of FIG2 is omitted. In addition, in this embodiment, a plurality of antenna elements 130 are disposed on the second side A2 of the lens assembly 110, and the antenna elements 130 are located at different relative positions of the lens assembly 110 to form a scanning beam B with a specific direction. Specifically, the sensing beam L2 provided by the antenna element 130 is transmitted from the second side A2 to the first side A1 through the lens assembly 110 to the target area 20, and the optical imaging range of the plurality of lens elements 112 on the optical axis I gradually decreases from the first side A1 to the second side A2. For example, in this embodiment, a plurality of antenna elements 130 are arranged around the lens assembly 110, and the orthographic projections of the plurality of antenna elements 130 on the reference plane F surround the orthographic projection of the lens assembly 110 on the reference plane F, and the extension direction of the reference plane F is perpendicular to the extension direction of the optical axis I.

Therefore, in this embodiment, the sensing beams L2 provided by the multiple antenna elements 130 can be transmitted to different surface areas of the target area 20 through the optical effect of the lens group 110 to form scanning beams B with different irradiation areas, as shown in FIG4. In other words, the image sensing device 100A of this embodiment arranges the multiple antenna elements 130 adjacent to the lens group 110, so that the reflected light beam L1 provided by the target area 20 and the sensing beams L2 provided by the multiple antenna elements 130 can share the lens group 110, as shown in FIG5 and FIG6, respectively, thereby achieving the integration of the antenna element 130 and the image sensing element 140 into a single module to form a better sensing position, and at the same time can save the device volume.

In summary, in the image sensing device and head-mounted display of the present invention, the image sensing device includes a lens set, a plurality of antenna elements and an image sensing element. Among them, the sensing beams provided by the plurality of antenna elements are transmitted through the lens set to the target area to form a scanning beam, and the reflected light beam reflected by the target area is transmitted through the lens set to the image sensing element. Therefore, by configuring the plurality of antenna elements adjacent to the lens set, the reflected light beam provided by the target area and the sensing beams provided by the plurality of antenna elements can share the lens set, and then can be integrated into a single module to form an optimal sensing position, while saving the device volume. In addition, by configuring the position adjuster to move the lens set, an optical vibration-proof effect can be provided and different beam directions can be added to the scanning beam, or different scanning ranges and areas can be added.

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

10: User

20: Target area

50: Head-mounted display device

100: Image sensing device

200: Display

B: Scanning beam

Claims (12)

An image sensing device comprises: a plurality of lens groups, each of the plurality of lens groups comprises a plurality of lens elements arranged along an optical axis; a connector connected between the plurality of lens groups, the connector comprising: a plurality of first parts; and a plurality of second parts connected between the plurality of first parts; a plurality of antenna elements respectively arranged at the plurality of first parts, for providing a plurality of sensing beams to a target area towards a first side; and a plurality of image sensing elements respectively arranged at a side of the plurality of lens groups facing a second side, for sensing a reflected light beam of the target area, wherein the direction of the second side is opposite to the direction of the first side. An image sensing device as described in claim 1, wherein the optical imaging range of the multiple lens elements on the optical axis gradually increases from the first side to the second side. An image sensing device as described in claim 1, wherein the connecting member is an optical lens, and the thickness of the multiple first parts in the direction of the optical axis is less than the thickness of the multiple second parts in the direction of the optical axis. An image sensing device as described in claim 1, wherein the connecting member is connected to a side of the plurality of lens groups facing the first side. An image sensing device as described in claim 1, wherein the plurality of antenna elements are located on one side of the plurality of first portions facing the second side. An image sensing device as described in claim 1, wherein the image sensing device can be used in a head-mounted display device, a vehicle device, a robot or a drone. An image sensing device as described in claim 1, wherein the image sensing device can be used in an augmented reality or virtual reality accessory of a controller, a bracelet, or a ring; and wherein the image sensing device can be configured in a device that requires spatial recognition. A head mounted display comprises: an image sensing device, comprising: a plurality of lens groups, each of the plurality of lens groups comprising a plurality of lens elements arranged along an optical axis; a connector connected between the plurality of lens groups, the connector comprising: a plurality of first parts; and a plurality of second parts connected between the plurality of first parts; a plurality of antenna elements respectively arranged on the plurality of first parts, for providing a plurality of sensing beams to a target area toward a first side; a plurality of image sensing elements respectively arranged on a side of the plurality of lens groups facing a second side, for sensing a reflected light beam of the target area, wherein the direction of the second side is opposite to the direction of the first side; and a main board, wherein the image sensing device is coupled to the main board via a signal line. A head-mounted display as described in claim 8, wherein the optical imaging range of the multiple lens elements on the optical axis gradually increases from the first side to the second side. A head mounted display as described in claim 8, wherein the connecting member is an optical lens, and the thickness of the multiple first parts in the direction of the optical axis is less than the thickness of the multiple second parts in the direction of the optical axis. A head mounted display as described in claim 8, wherein the connector is connected to a side of the plurality of lens groups facing the first side. A head mounted display as described in claim 8, wherein the plurality of antenna elements are located on a side of the plurality of first portions facing the second side.

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