Image sensing device and head-mounted display

An image sensing device includes a frame body, a lens group, a position adjuster, multiple antenna elements, and an image sensing element. The frame body has an accommodating space. The lens group is disposed in the accommodating space. The position adjuster is connected between the lens group and the frame body, and configured to allow the lens group to move in the accommodating space. The antenna elements are disposed on a second side of the lens group, and configured to provide sensing beams to a target area. The image sensing element is disposed on the second side of the lens group, and configured to sense reflected light beams of the target area. In addition, a head-mounted display device is also provided.

BACKGROUND

Technical Field

The disclosure relates to an electronic device, and more particularly, to an image sensing device and a head-mounted display device.

Description of Related Art

With the increasing development of the technology industry, the types, functions, and ways of use of electronic devices are becoming more and more diverse, and wearable electronic devices that may be directly worn on a user's body are also born accordingly. There are quite a few types of head-mounted display devices. Taking head-mounted electronic devices such as goggles as an example, after wearing such an electronic device, in addition to seeing stereoscopic images, the images may further change as the user's head turns, providing a more immersive experience for the user.

However, in the current head-mounted electronic device design, there are various modules with different functions in the structure, resulting in the high volume of the head-mounted electronic device. In addition, at this stage of development, the coverage of radar beams or the diversity characteristics of radar beams are limited by the limited number of antenna elements, and specific positions on the head-mounted electronic device need to be disposed with image and radar sensors at the same time.

SUMMARY

The disclosure provides an image sensing device and a head-mounted display device, which may allow an antenna and an image sensing element to be integrated into a single module to form an optimal sensing position and increase different beam directions.

The disclosure provides an image sensing device, which includes a frame body, a lens group, a position adjuster, multiple antenna elements, and an image sensing element. The frame body has an accommodating space. The lens group is disposed in the accommodating space. The position adjuster is connected between the lens group and the frame body, and configured to allow the lens group to move in the accommodating space. The antenna elements are disposed on a second side of the lens group, and configured to provide sensing beams to a target area. The image sensing element is disposed on the second side of the lens group, and configured to sense reflected light beams of the target area.

The disclosure further provides a head-mounted display device, which includes an image sensing device and a display. The image sensing device includes a frame body, a lens group, a position adjuster, multiple antenna elements, and an image sensing element. The frame body has an accommodating space. The lens group is disposed in the accommodating space. The position adjuster is connected between the lens group and the frame body, and configured to allow the lens group to move in the accommodating space. The antenna elements are disposed on a second side of the lens group, and configured to provide sensing beams to a target area. The image sensing element is disposed on the second side of the lens group, and configured to sense reflected light beams of the target area. The display is electrically connected to the image sensing device.

Based on the above, in the image sensing device and the head-mounted display device of the disclosure, the image sensing device includes a frame body, a lens group, a position adjuster, multiple antenna elements, and an image sensing element. The position adjuster is connected between the lens group and the frame body, and configured to allow the lens group to move in the accommodating space. The sensing beams provided by the antenna elements are transmitted through the lens group to the target area to form scanning beams, and the reflected beams reflected from the target area are transmitted through the lens group to the image sensing element. Therefore, by configuring the antenna elements adjacent to the lens group, the reflected beams provided by the target area and the sensing beams provided by the antenna elements may share the lens group, which may further be integrated into a single module to form the optimal sensing position, while saving the volume of the device. In addition, by configuring the position adjuster to move the lens group, an optical shock-absorbing effect may be provided and different beam directions may be added to the scanning beam.

In order to make the aforementioned features and advantages of the disclosure comprehensible, embodiments accompanied with drawings are described in detail as follows.

DESCRIPTION OF THE EMBODIMENTS

FIG.1is a schematic diagram of a head-mounted display device according to an embodiment of the disclosure. Please refer toFIG.1. An embodiment of the disclosure provides a head-mounted display device50, which may be worn by a user10to achieve the effect of experiencing virtual reality, augmented reality or mixed reality. In the embodiment, the head-mounted display device50includes an image sensing device100and a display200. The image sensing device100is configured to sense a target area20. The display200is electrically connected to the image sensing device100, and configured to generate an image screen according to a sensing result of the image sensing device100.

FIG.2is a schematic diagram of the image sensing device of the head-mounted display device ofFIG.1.FIGS.3A and3Bare schematic diagrams of the image sensing device ofFIG.2in different states, respectively. Please refer toFIGS.1,2, and3Aat the same time. In the embodiment, the image sensing device100includes a frame body110, a lens group120, a position adjuster130, multiple antenna elements140, and an image sensing element150. The frame body110has an accommodating space E, and the lens group120is disposed in the accommodating space E. The frame body110is connected to other structures of the head-mounted display device50, such as a casing. The lens group120includes an optical axis I and multiple lens elements122arranged along the optical axis I. For example, the lens group120includes, for example, a combination of one or more optical lenses having diopters, such as various combinations of non-planar lenses, including biconcave lenses, biconvex lenses, concave-convex lenses, convex-concave lenses, plano-convex lenses, and plano-concave lenses. In the embodiment, the lens elements122are arranged along the optical axis I, as shown inFIG.3A. The image sensing element150is disposed on a second side A2of the lens group120, and may be configured to sense reflected light beams L1of the target area20, thereby optically imaging the facial appearance of the target area20of the user10. Specifically, the reflected light beam L1emitted from the target area20is transmitted from a first side A1to the second side A2through the lens group120to the image sensing element150, and the direction of the second side A2is opposite to the direction of the first side A1.

Please refer toFIGS.1,2, and3B. The antenna elements140are disposed on the second side A2of the lens group120, and configured to provide sensing beams L2to the target area20to form scanning beams B having specific directions. Specifically, the sensing beam L2provided by the antenna element140is transmitted through the lens group120to the target area20from the second side A2to the first side A1, and the direction of the second side A2is opposite to the direction of the first side A1. In the embodiment, for example, four antenna elements140are disposed, and orthographic projections of the antenna elements140on a reference plane F surround an orthographic projection of the lens group120on the reference plane F. The extension direction of the reference plane F is perpendicular to the extension direction of the optical axis I, and the orthographic projections of the antenna elements140are evenly distributed around the orthographic projection of the lens group120, but the disclosure is not limited thereto. In the embodiment, the sensing beams L2respectively provided by the antenna elements140may be transmitted to different surface areas of the target area20by the optical effect of the lens group120(i.e., irradiation areas of the scanning beams B, as shown inFIG.1). In other words, in the image sensing device100of the embodiment, the antenna elements140are disposed adjacent to the lens group120, so that the reflected light beams L1provided by the target area20and the sensing beams L2provided by the antenna elements140may share the lens group120. In this way, the antenna elements140and the image sensing element150may be integrated into a single module to form a better sensing position, and the volume of the device may be saved at the same time.

FIG.4is a schematic diagram of a lens group of an image sensing device when moving according to an embodiment of the disclosure. Please refer toFIGS.1,2, and4. The position adjuster130is connected between the lens group120and the frame body110, and the lens group120is adapted to move in the accommodating space E by the position adjuster130. For example, in the embodiment, the position adjuster130includes multiple elastic members132, which are respectively connected between the frame body110and the lens group120. The elastic members132are configured to provide a shock-absorbing function to the lens group120, which may slow down the vibration of the lens group120. The embodiment may further improve the optical precision of the image sensing device100by the shock-absorbing function provided by the position adjuster130. In addition, in the embodiment, the image sensing device100further includes a micro-electromechanical system (MEMS, not shown), which is electrically connected to the position adjuster130. The MEMS controls the position adjuster130to move the position of the lens group120in the accommodating space E. In other words, in the embodiment, the position adjuster130may not only provide a passive shock-absorbing function to the lens group120, but also actively move the position of the lens group120under the control of the MEMS.

It is worth mentioning that the sensing beam L2provided by the antenna element140may be moved in the accommodating space E through the lens group120to change the beam direction of the sensing beam L2. As shown inFIG.4, when the position of the lens group120is not changed, the antenna element140provides the scanning beam B in a beam direction. And when the position of the lens group120is changed to a position120_1, the antenna element140provides a scanning beam B1of another beam direction. When the position of the lens group120is changed to a position120_2, the antenna element140provides a scanning beam B2of the third different beam direction. In this way, the beam direction of the scanning beam B may be further adjusted by moving the position of the lens group120, thereby generating the scanning beams B, B1, and B2with different beam directions. Therefore, the sensing effect may be improved by switching the scanning beams B, B1, and B2of the beam directions.

FIG.5is a timing diagram showing that an image sensing device according to an embodiment of the disclosure switches to a first mode and a second mode according to the timing sequence. Please refer toFIGS.1,4, and5. In one embodiment, the image sensing device100may switch the moving state of the lens group120in sequence. Specifically, the image sensing device100is switched to the first mode and the second mode in sequence, and in the first mode, the image sensing device100activates the antenna elements140and further activates the MEMS to move the lens group120. Therefore, in the first mode, the sensing beam L2changes the beam direction through the movement of the lens group120in the accommodating space E, thereby changing the beam direction and the irradiation range of the scanning beam B on the target area20. In the second mode, the image sensing device100activates the image sensing element150to receive visible light. In other words, when the image sensing device100is switched to the first mode, the image sensing element150is turned off and the antenna elements140and the MEMS are activated. At this time, the lens group120moves actively and has the projected scanning beam B for performing a radar scanning function C1. When the image sensing device100is switched to the second mode, the image sensing element150is activated and the antenna elements140and the MEMS are turned off. At this time, the lens group120moves inactively and has a shock-absorbing function C2. In this way, the effect of switching the radar scanning function C1and the shock-absorbing function C2at any time may be achieved by switching and activating different elements continuously. In addition, when the radar scanning function C1is performed, since the MEMS continuously moves the lens group120to different positions, the direction and phase of the scanning beam B may also be gradually changed at any time, thereby enhancing the diversity of the scanning beam B, as shown inFIG.5.

To sum up, in the image sensing device and the head-mounted display device of the disclosure, the image sensing device includes a frame body, a lens group, a position adjuster, multiple antenna elements, and an image sensing element. The position adjuster is connected between the lens group and the frame body, and configured to allow the lens group to move in the accommodating space. The sensing beams provided by the antenna elements are transmitted through the lens group to the target area to form the scanning beams, and the reflected beams reflected from the target area are transmitted through the lens group to the image sensing element. Therefore, by configuring the antenna elements adjacent to the lens group, the reflected beams provided by the target area and the sensing beams provided by the antenna elements may share the lens group, which may further be integrated into a single module to form the optimal sensing position, while saving the volume of the device. In addition, by configuring the position adjuster to move the lens group, the optical shock-absorbing effect may be provided and different beam directions may be added to the scanning beam.

Although the disclosure has been described with reference to the above embodiments, the described embodiments are not intended to limit the disclosure. People of ordinary skill in the art may make some changes and modifications without departing from the spirit and the scope of the disclosure. Thus, the scope of the disclosure shall be subject to those defined by the attached claims.