TWI684791B - Head-mounted display and imaging apparatus for displaying image thereof - Google Patents

Abstract

A head-mounted display and an imaging apparatus for displaying image thereof are provided. The imaging apparatus includes a first display, a second display, and a first focus adjusting apparatus. The first display generates a first sub-image; wherein the first sub-image is located at a first imaging plane, and is then projected to the target system. The second display generates a second sub-image; wherein the second sub-image is located at a second imaging plane, and is then projected to the target system. The first focus adjusting apparatus is in front of the second display, and is used to adjust the position of the second imaging plane. The first imaging surface and a second imaging surface are overlapped or non-overlapped.

Description

Head-mounted display and image imaging device

The invention relates to a head-mounted type and its display image imaging device, and in particular to a head-mounted type and its display image imaging device which can dynamically adjust the display mode.

With the advancement of electronic technology, the research and development of displays have also changed dramatically. In today's electronic products, it is an inevitable trend to install high-resolution display devices. Especially in virtual reality and augmented reality head-mounted displays, in the limited software and hardware resources, how to improve the resolution of the display screen, or how to provide high-quality stereo vision, are designed in the art Important issues for the author.

The invention provides a head-mounted display and its image imaging device, which can dynamically adjust the operation mode to provide image resolution or provide a depth display effect.

The image imaging device of the present invention includes a first display, a second display, and a first zoom device. The first display generates a first sub-image, where the first sub-image is imaged on the first imaging surface and imaged to the target system again. The second display generates a second sub-image, where the second sub-image is imaged on the second imaging surface and imaged to the target system again. The first zoom device is arranged in front of the second display and used to adjust the position of the second imaging surface. The first imaging plane and the second imaging plane overlap each other or do not overlap each other.

The head-mounted display of the present invention includes a housing and at least one image imaging device as described above. The image imaging device is provided in the housing.

Based on the above, the present invention adjusts the position of the second imaging surface of the second sub-image generated by the second display through the zoom device, and enables the first imaging surface and the second imaging surface to overlap or not overlap each other. By overlapping the first imaging surface and the second imaging surface to improve image resolution; and by not overlapping the first imaging surface and the second imaging surface, the depth of the displayed image can be increased. In this way, the image imaging device is a dual-state adjustable super-resolution depth optical imaging device, which greatly improves the visual effect.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

Please refer to FIG. 1, which is a schematic diagram of an image imaging device according to an embodiment of the invention. The image imaging device 100 includes a first display 110, a second display 120, a lens group 140, and a zoom device 130. In this embodiment, the lens group 140, the first display 110, the zoom device 130, and the second display 120 may be sequentially arranged along the same axis AX1, where the axis AX1 passes through the target system TA1.

The first display 110 is imaged on the first imaging plane IS2. The second display 120 is imaged on the second imaging plane IS1. In this embodiment, the target system TA1 is where the user's eyes or image sensor system is located. The first display 110 and the second display 120 respectively generate a first sub-image on the first imaging plane and a second sub-image on the second imaging plane, and image the target area TA1 again. Through the function of the lens group 140, the first display forms a virtual image on the first imaging plane IS2, and the second display forms another virtual image on the second imaging plane IS1.

It is worth noting that the zoom device 130 is disposed in front of the second display 120, and the position of the second imaging surface IS1 is changed by adjusting the focal length of the zoom device 130. The zooming device 130 may overlap the second imaging plane IS1 and the first imaging plane IS2, or have a distance between the second imaging plane IS1 and the first imaging plane IS2 without overlapping each other.

For details of the operation of the zoom device 130, please refer to the schematic diagram of the adjustment operation of the second imaging plane of the embodiment of the present invention shown in FIG. 2. In FIG. 2, the image imaging device 100 further includes a controller 210. The controller 210 is coupled to the zoom device 130 and provides a control signal CTR to the zoom device 130. The zoom device 130 may be an electronically controlled liquid crystal lens (or an electronically controlled liquid crystal lens array), and may adjust the focal length of the electronically controlled liquid crystal lens according to the control signal CTR. After the focal length of the zoom device 130 is adjusted, the second display generates a new image relationship, thereby changing the position of the second imaging surface IS1, so that the second imaging surface IS1 can be adjusted according to the control signal CTR.

In this embodiment, the original position of the second imaging plane IS1 may be different from the position of the first imaging plane IS2. Through the above adjustment mechanism, the second imaging plane IS1 can be adjusted to the imaging plane IS1' to approach the first imaging plane IS2, or the second imaging plane IS1 can be adjusted to the imaging plane IS1'' to overlap the first imaging plane IS2 . Of course, in other embodiments, the original position of the second imaging plane IS1 may be the same as the position of the first imaging plane IS2, and the first imaging plane IS2 and the second imaging plane IS1 overlap each other. Through the above adjustment mechanism, the first imaging plane IS2 and the second imaging plane IS1 can be isolated without overlapping.

Incidentally, the first display 110 and the second display 120 in this embodiment may be flat displays. The first display 110 and the second display 120 respectively corresponding to the first imaging surface IS2 and the second imaging surface IS1 may be flat. In other embodiments of the present invention, the first display 110 and the second display 120 may be non-planar displays (for example, curved displays). Under this condition, the first display 110 and the second display 120 respectively correspond to the first The imaging surface IS2 and the second imaging surface IS1 may be curved surfaces. It is worth noting that in this embodiment, the first display 110 may be a transparent display. In this way, the second display 110 can pass through the first display 110 and image twice to the target area TA1.

In addition, in this embodiment, the lens group 140 may include one or more lenses. The lens group 140 represented by the convex lens shown in the figure is only an illustration for illustration, and does not mean that the lens group 140 can only be composed of a single lens. Composed of convex lenses.

The controller 210 may be a processor with computing capability. Or the controller 210 can be designed through a hardware description language (Hardware Description Language, HDL) or any other design method of digital circuits well known to those skilled in the art, and can be programmed through a field programmable logic gate array (Field Programmable Gate Array (FPGA), Complex Programmable Logic Device (CPLD) or a hardware circuit implemented in the form of an application-specific integrated circuit (ASIC). In this embodiment, the controller 210 can generate the control signal CTR according to the display mode that the image imaging device 100 needs to execute. In an analog control mode, the controller 210 can drive the zoom device 130 to adjust the position of the second imaging surface IS1 through the voltage level of the control signal CTR. In the digital control mode, the controller 210 can transmit a value through the control signal CTR, and cause the zoom device 130 to adjust the position of the second imaging surface IS1 according to the magnitude of the received value and change the first imaging surface The distance between IS2 and the second imaging surface IS1. The relationship between the magnitude of the voltage of the control signal CTR and the magnitude of the transferred value, and the distance between the first imaging plane IS2 and the second imaging plane IS1 can be determined by the designer without any restrictions.

Next, please refer to FIGS. 3A and 3B. FIGS. 3A and 3B respectively illustrate display images generated by the imaging device of the embodiment of the present invention in different modes. In FIG. 3A, the first sub-image has a plurality of first display pixels PS1, and the second sub-image has a plurality of second display pixels PS2. The plurality of first display pixels PS1 in the first sub-image are alternately arranged with the second display pixels PS2 in the second sub-image. Under such conditions, when the first imaging plane and the second imaging plane overlap each other, the interlaced first display pixels PS1 and second display pixels PS2 can be combined into a high-resolution display image. That is to say, through the image imaging device of the embodiment of the present invention, the resolution of the display image that can be generated can be the sum of the resolution of the first display and the resolution of the second display.

In FIG. 3B, the first imaging plane IS2 and the second imaging plane IS1 do not overlap each other, and have a pitch DS. In this way, the display images respectively generated on the first imaging surface IS2 and the second imaging surface IS1 can have a depth difference, and can generate a visual effect of a stereoscopic image with depth.

As shown in FIG. 4, the lens group 440, the beam splitter 450 and the first display 410 can be arranged along the axis AX1 in this order. The first display 410 penetrates the spectroscopic element 450 to form an image to the first imaging surface IS2, and then performs secondary imaging to the target system TA1. The second display is reflected and imaged to the second imaging surface IS1, and then imaged to the target system TA1 by the second imaging.

As in the previous embodiment, the position of the second imaging surface IS1 can be adjusted by adjusting the focal length of the zoom device 430. By providing a gap between the second imaging surface IS1 and the first imaging surface IS2, the image imaging device 400 can generate a display image with depth. In contrast, by overlapping the second imaging plane IS1 and the first imaging plane IS2, the resolution of the displayed image generated by the image imaging device 400 can be improved.

For the configuration details of the light splitting device 450, please refer to the schematic diagram of the implementation of the light splitting device according to the embodiment of the present invention shown in FIG. 5. In FIG. 5, the light splitting device 450 can transmit the light of the first display 410 and image it on the first imaging surface IS2. The spectroscopic device 450 can also reflect the light of the second display 420 and image it on the second imaging surface IS1. The second surface S2 of the beam splitter 450 and the optical axis PP of the second display 420 have an angle q. In this embodiment, the included angle q is between 5 degrees and 85 degrees.

On the other hand, in the embodiment of FIG. 5, another zoom device 460 may be configured corresponding to the first display 410. The zoom device 460 can adjust the position of the first imaging surface IS2 to increase the flexibility of the image imaging device in changing the position of the imaging surface.

On the other hand, the zoom device 460 and the zoom device 430 may be selected to be set, or may be set at the same time, and there is no particular limitation.

Please refer to FIG. 6 below, which is a schematic diagram of a head-mounted display according to an embodiment of the invention. The head-mounted display 600 includes one or more image imaging devices 610 and a housing 620. The image imaging device 610 corresponds to the target system TA1 to be provided in the housing 620.

The image imaging device 610 in this embodiment can be implemented by the image imaging device 100 or 400 of the foregoing embodiment. Regarding the details of the operation of the image imaging device 100 or 400, detailed descriptions have been given in the foregoing examples and implementations, which will not be repeated here.

In summary, the image imaging device of the present invention can adjust the zoom of the zoom device 430 to make the imaging surfaces of the two sub-images generated by the two displays overlap or separate from each other. In this way, the image imaging device may have different operation modes and be used to generate a high-resolution display image or generate a stereoscopic image with a deep visual effect. Effectively improve the performance of image imaging devices.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some 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 the scope defined in the appended patent application.

100, 400, 610‧‧‧ imaging imaging device

110, 410‧‧‧ first display

120、420‧‧‧Second display

140, 440‧‧‧ lens group

130, 430, 460‧‧‧ zoom device

600‧‧‧Head-mounted display

620‧‧‧Housing

AX1‧‧‧Axis

TA1‧‧‧Target system

IS1‧‧‧Second imaging surface

IS2‧‧‧First imaging plane

210‧‧‧Controller

CTR‧‧‧Control signal

PS1, PS2 ‧‧‧ display pixels

DS‧‧‧spacing

S1, S2‧‧‧surface

PP‧‧‧ Optical axis of the second display

DP‧‧‧Reflection path

q‧‧‧ included angle

IS1’, IS1’’ imaging surface

FIG. 1 is a schematic diagram of an image imaging device according to an embodiment of the invention. FIG. 2 is a schematic diagram illustrating the adjustment action of the second imaging plane according to the embodiment of the invention. 3A and 3B respectively show display images generated by the imaging device of the embodiment of the present invention in different modes. 4 is a schematic diagram of a display image generated by another embodiment of the invention. FIG. 5 is a schematic diagram of an implementation manner of a spectroscopic device according to an embodiment of the invention. 6 is a schematic diagram of a head-mounted display according to an embodiment of the invention.

100‧‧‧Image imaging device

110‧‧‧ First display

120‧‧‧Second display

140‧‧‧ lens group

130‧‧‧Zoom device

AX1‧‧‧Axis

TA1‧‧‧Target system

IS1‧‧‧Second imaging surface

IS2‧‧‧First imaging plane

Claims (9)

An image imaging device includes: a first display for imaging a first sub-image on a first imaging surface; a second display for imaging a second sub-image on a second imaging surface; and a first zoom device, Placed in front of the second display to adjust the position of the second imaging surface; and a second zoom device to adjust the position of the first imaging surface, wherein the first imaging surface and the second imaging surface are mutually Overlap or not overlap each other. The image imaging device as described in item 1 of the patent scope further includes: a controller coupled to the first zoom device, the controller transmits a control signal to the first zoom device, wherein the first zoom device According to the control signal, the position of the second imaging plane is adjusted. The image imaging device according to item 1 of the patent application scope, wherein the first sub-image includes a plurality of first display pixels, and the second sub-image includes a plurality of second display pixels, when the first imaging surface is When the second imaging planes overlap each other, the first display pixels and the second display pixels are alternately arranged with each other. The image imaging device according to item 1 of the patent application scope, wherein when the first imaging plane and the second imaging plane do not overlap, the first imaging plane and the second imaging plane generate a stereoscopic image. The image imaging device as described in item 1 of the patent application scope further includes: A beam splitting device, arranged on the imaging path of the first sub-image and the second sub-image, for transmitting the first sub-image to the target system; and for generating a according to the projection path of the second sub-image The reflection path, and the second sub-image is transmitted to the target system according to the reflection path. The image imaging device as described in item 4 of the patent application range, wherein the surface of the spectroscopic device has an angle with the optical axis of the second display, and the angle is between 5 degrees and 85 degrees. The image imaging device as described in item 1 of the scope of the patent application further includes: a lens group disposed on the imaging path of the first imaging plane and the second imaging plane and adjacent to the target system. The image imaging device as described in item 1 of the patent application range, wherein the second zoom device is disposed on the imaging path of the first sub-image. A head-mounted display includes: a housing; and at least one image imaging device as described in item 1 of the patent application scope, which is disposed in the housing.

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