CN204028464U - head-mounted display apparatus - Google Patents

Abstract

The utility model discloses a head-mounted display device, which comprises a casing and a group of optical systems installed in the casing. The optical system includes a first image display screen, a second image display screen, a plane total reflection mirror, an optical Magnification lens group, half-wave plate, first polarizer and second polarizer, the half-wave plate is located at the front of the second image display screen, the first polarizer and the second polarizer are arranged side by side at the rear of the optical magnification lens group near the eye end; the optical path of the optical system is: the light information emitted by the first image display screen is reflected by the plane total reflection mirror to the optical magnifying lens group, transmitted through the optical magnifying lens group, and then transmitted into the human eye by the first polarizer; the second image The light information emitted by the display screen is transmitted through the half-wave plate, reflected by the plane total reflection mirror to the optical magnifying lens group, transmitted through the optical magnifying lens group, and then transmitted into the human eye by the second polarizer. The head-mounted display device of the utility model has a simple structure and a lightweight design, allowing users to conveniently experience the stereoscopic visual effect of the large screen.

Description

head mounted display device

technical field

The utility model relates to the technical field of optical image display, in particular to a head-mounted display device.

Background technique

With the vigorous development of 3D stereoscopic display technology, 3D stereoscopic display technology is revolutionizing and changing people's communication, work and lifestyle. Stereoscopic display technology restores the real three-dimensional world of human beings with the help of image technology, and will lead the future of video The development trend of science and technology. Since 2010, the global 3D stereoscopic display technology industry environment represented by 3D TV and 3D film and television has become increasingly mature. Compared with traditional display devices, 3D stereoscopic display devices have the biggest feature that 3D stereoscopic display devices can truly experience The huge impact and extreme shock brought by the stereoscopic vision, so the stereoscopic strength of the displayed image is an important indicator to measure the performance of the stereoscopic display device.

However, traditional stereoscopic display technologies, such as 3D movies and 3D TVs, greatly limit the viewing space of users, and most portable stereoscopic display devices on the market cannot satisfy users' requirements for resolution, field of view, and portability. requirements. Although multifunctional and miniaturized electronic display devices can bring convenience to users, such as Google Glass, "portable" and "miniaturization" also limit the size of the display screen, and the small display screen is easy to cause damage to the user's eyes. fatigue. Therefore, how to make a single device have both the characteristics of "miniaturization" and "big display" has become an important problem to be solved urgently.

Utility model content

The purpose of this utility model is to provide a head-mounted display device with the characteristics of "miniaturization" and "big display", which allows users to connect it to mobile phones, tablet computers and other display devices with wired or wireless methods anytime and anywhere. Conveniently enjoy the large-screen stereoscopic visual effect on the electronic equipment with various functions.

In order to achieve the above purpose, the utility model provides a head-mounted display device, which includes a casing and a group of optical systems installed in the casing. The optical system includes a first image display screen, a second image display screen, a flat full Reflector, an optical magnifying lens group, half-wave plate, first polarizer and second polarizer, the half-wave plate is located at the front of the second image display screen, the first polarizer and the second polarizer are placed side by side on the optical magnification The rear part of the lens group near the eye end; the optical path of the optical system is: the light information emitted by the first image display screen is reflected by the plane total reflection mirror to the optical magnifying lens group, transmitted through the optical magnifying lens group, and then transmitted into the human body by the first polarizer Eye; the light information emitted by the second image display screen is transmitted through the half-wave plate, reflected by the plane total reflection mirror to the optical magnifying lens group, transmitted through the optical magnifying lens group, and then transmitted into the human eye by the second polarizer.

When using the head-mounted display device of the present utility model to watch images, when the images displayed by the two image display screens are completely consistent, what the user sees is a 2D plane image; when the images displayed by the two image display screens have a certain bit difference, What the user sees is a 3D stereoscopic image.

Preferably, the polarization directions of the first polarizer and the second polarizer are perpendicular to each other.

Preferably, the plane total reflection mirror is installed on the opposite side of the optical magnification lens group, and the normal line of the plane total reflection mirror is parallel to the optical axis of the optical magnification lens group.

Preferably, the first image display screen and the second image display screen are respectively installed on the same side of the housing at a first angle and a second angle with the plane total reflection mirror.

Preferably, the head-mounted display device further includes a power supply module, which is connected to the first image display screen and the second image display screen through a circuit, and supplies power to the image display screen through a built-in or external power supply.

Preferably, the head-mounted display device further includes a peripheral connection module, and the peripheral connection module connects the head-mounted display device with an electronic device with a playback function through a wired or wireless method, and acquires information to be displayed.

Preferably, the surface of the plane total reflection mirror is coated with a total reflection film.

Preferably, a diopter adjuster is installed near the eye end of the head-mounted display device.

Preferably, buckles are respectively provided on both sides of the housing for fastening the headband or the support frame.

Preferably, a buckle is provided above the housing for fastening the headband or the support frame.

The head-mounted display device of the utility model has the advantages of simple structure, light and handy design, and is convenient for industrialized production. With the above-mentioned head-mounted display device, an enlarged virtual image can be presented at a certain distance in front of the user's eyes. When watching a 3D movie or a 3D game scene display, the user can enjoy the stereoscopic effect of a large field of view. The type display device is well enclosed and has good privacy. It will not affect the people around when used in public places. It is very suitable for users who want to have personal space.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative labor:

FIG. 1 shows a schematic structural diagram of a head-mounted display device according to an embodiment of the present invention;

Fig. 2 shows a schematic layout of an optical system of a head-mounted display device according to an embodiment of the present invention.

Detailed ways

In order to understand the purpose, features and advantages of the utility model more clearly, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, a lot of specific details have been set forth in order to fully understand the utility model, but these are only some embodiments of the utility model, and the utility model can also be implemented in other ways different from those described here, so However, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

Embodiment one

Fig. 1 shows a schematic structural diagram of a head-mounted display device according to an embodiment of the present invention.

The head-mounted display device of the embodiment of the utility model includes a casing and a group of optical systems installed in the casing. The optical system includes a first image display screen, a second image display screen, a flat total reflection mirror, and an optical magnification lens. group, a half-wave plate, a first polarizer and a second polarizer, the half-wave plate is located at the front of the second image display screen, and the first polarizer and the second polarizer are arranged side by side at the rear near-eye end of the optical magnification lens group; The optical path of the optical system is: the light information emitted by the first image display screen is reflected by the plane total reflection mirror to the optical magnifying lens group, transmitted through the optical magnifying lens group, and then transmitted into the human eye by the first polarizer; the second image display screen The emitted light information is transmitted through the half-wave plate, reflected by the plane total reflection mirror to the optical magnifying lens group, transmitted through the optical magnifying lens group, and then transmitted into the human eye by the second polarizer.

The housing 1 of the head-mounted display device in the embodiment of the present utility model is provided with a light hole 21 and a light hole 22 , and the hole spacing and hole diameter can be adjusted. The light through hole 21 and the light through hole 22 are respectively located at the near-eye end of the rear part of the first polarizer and the second polarizer, that is, the light path exit of the optical system. The user can watch the image by placing his eyes at the light hole. When the images displayed by the two image display screens are completely consistent, the user sees a 2D plane image; when the images displayed by the two image display screens have a certain When there is a difference in position, what the user sees is a 3D stereoscopic image.

The head-mounted display device in the embodiment of the present invention also includes a peripheral connection module (the peripheral connection module includes a wired connection interface and/or a wireless connection module, which is not shown in the drawings), and the peripheral connection module connects the The head-mounted display device is connected with an electronic device with a playback function to obtain and receive information to be displayed. The electronic device with a playback function may be a TV, a mobile phone, a tablet computer, and the like.

The head-mounted display device in the embodiment of the utility model also includes a power supply module. The power supply module can be designed to be powered by its own battery, or can be designed to be powered by the power supply of the external electronic device when it is connected to an external electronic device through a wired method.

The head-mounted display device in the embodiment of the utility model also includes a storage module, and the storage module can be designed as a data storage unit including a built-in storage chip or a detachable data storage card (SD card, TF card, U disk, etc.), and In the data reading unit for reading the image data in the data storage unit, the data reading unit is connected with the image display screen, and is used for displaying the read image data on the image display screen.

In the head-mounted display device according to the embodiment of the utility model, the first image display screen, the second image display screen, the half-wave plate, and the plane total reflection mirror are assembled through the positioning slot up and down and/or left and right sides, wherein the plane total reflection The mirror is installed on the opposite side of the optical magnifying lens group, the first image display screen is installed at the side between the plane total reflection mirror and the optical magnifying lens group at an angle of first with the plane total reflection mirror, and the second image display screen is connected with the plane total reflection mirror and the optical magnification lens group. The plane total reflection mirror is installed at the second included angle on the side between the plane total reflection mirror and the optical magnifying lens group, the first included angle and the second included angle are respectively between 30 and 60 degrees, and the first included angle It is different from the second included angle.

In the head-mounted display device according to the embodiment of the present invention, the optical system installed in the casing can be arranged on any one of the left and right sides of the casing. Since the two image display screens are adjacently placed on the same side inside the casing, the spatial layout of the two image display screens is compact and there is no overlapping portion, which can make the size of the planar total reflection mirror smaller. At the same time, the two optical channels share a set of optical magnifying lens groups, which can effectively reduce image aberrations, make image display clearer, restore more realistic, and achieve high-quality stereoscopic image presentation. The design of the head-mounted display device The volume can be smaller, lighter and more convenient to use.

Embodiment two

Fig. 2 shows a schematic layout of an optical system of a head-mounted display device according to an embodiment of the present invention.

In the head-mounted display device of the embodiment of the present utility model, the optical system includes an image display screen 31, an image display screen 32, a flat total reflection mirror 4, an optical magnifying lens group 5, a half-wave plate 8, a polarizer 61 and a polarizer 62, The half-wave plate 8 is located at the front of the image display screen 32, and the polarizing plate 61 and the polarizing plate 62 are arranged side by side at the rear end of the optical magnifying lens group 5 near the eye.

In the head-mounted display device according to the embodiment of the present utility model, the optical system has two optical paths respectively using the image display screen 31 and the image display screen 32 as image sources, one of which is: the optical information sent by the image display screen 31 Reflector 4 reflects to optical magnifying lens group 5, transmits through optical magnifying lens group 5, and then transmits into human eye 72 by polarizer 62; It is reflected by the plane total reflection mirror 4 to the optical magnification lens group 5 , transmitted through the optical magnification lens group 5 , and then transmitted into the human eye 71 by the polarizer 61 .

Specifically, the polarization directions of the polarizer 61 and the polarizer 62 are perpendicular to each other, the light information sent by the image display screen 31 is reflected to the optical magnifying lens group 5 by the plane total reflection mirror 4, and the light information sent by the image display screen 32 passes through the half-wave plate 8 transmission, thereby changing the polarization direction, and then reflected by the plane total reflection mirror 4 to the optical magnification lens group 5, the two groups of light information have the light polarization directions perpendicular to each other, after being transmitted through the optical magnification lens group 5, they are respectively recorded with horizontal polarization After being modulated, the polarizer 61 with a vertical polarization direction and the polarizer 62 with a vertical polarization direction are transmitted into human eyes, thereby presenting a clear and true stereoscopic image.

Further, the optical magnifying lens group of the utility model head-mounted display device in this embodiment can be fixed to the lens barrel structure through a flexible support member, and the lens barrel structure is fixed in the housing by bonding.

In order to prevent stray light from repeatedly turning back in the entire optical system and interfering with the imaging quality, in the above-mentioned embodiments, it is better to arrange a light-absorbing sheet on both sides of the housing or to arrange a layer of light-absorbing layers on the inner walls of the housing. The stray light is absorbed. The easiest way to install a light-absorbing layer on the inner wall of the housing is to spray a layer of black coating on the inner wall of the housing.

In a preferred embodiment, the near-eye end of the head-mounted display device is also equipped with a diopter adjuster. The diopter adjuster can adjust the diopter within a certain range, so as to accommodate users with diopter within this range without wearing glasses. Under normal circumstances, the head-mounted stereo viewing device can be used normally.

In the head-mounted display device of the embodiment of the present utility model, Fig. 1 shows the main structure of the head-mounted display device, and the head-mounted display device can be connected and fixed by the head-mounted display The device is also worn on the user's head (not shown in the drawings).

It is stated again that all features disclosed in this specification, or steps in all methods or processes disclosed, can be combined in any way except for mutually exclusive features and/or steps.

Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

The utility model is not limited to the aforementioned specific embodiments. The utility model can be extended to any new feature or any new combination disclosed in this specification, as well as the steps of any new method or process or any new combination disclosed.

Claims (10)

1. A head-mounted display device, characterized in that the head-mounted display device includes a casing and a set of optical systems installed in the casing, wherein, The optical system includes a first image display screen, a second image display screen, a flat total reflection mirror, an optical magnification lens group, a half-wave plate, a first polarizer and a second polarizer, and the half-wave plate is located at the The front part of the second image display screen, the first polarizer and the second polarizer are arranged side by side at the rear near eye end of the optical magnification lens group; The optical path of the optical system is: the light information emitted by the first image display screen is reflected by the plane total reflection mirror to the optical magnifying lens group, transmitted through the optical magnifying lens group, and then transmitted by the first polarizer transmitted into the human eye; the light information emitted by the second image display screen is transmitted through the half-wave plate, reflected by the plane total reflection mirror to the optical magnifying lens group, transmitted through the optical magnifying lens group, and then It is transmitted into the human eye by the second polarizer. 2. The head-mounted display device according to claim 1, wherein the polarization directions of the first polarizer and the second polarizer are perpendicular to each other. 3. The head-mounted display device according to claim 1, wherein the plane total reflection mirror is installed on the opposite side of the optical magnification lens group, and the normal line of the plane total reflection mirror and the optical magnification lens The optical axes of the groups are parallel. 4. The head-mounted display device according to claim 1, wherein the first image display screen and the second image display screen form a first angle and a second angle with the plane total reflection mirror respectively. The two included angles are installed on the same side of the housing. 5. The head-mounted display device according to any one of claims 1 to 4, characterized in that, the head-mounted display device further comprises a power supply module, and the power supply module is compatible with the first image display screen and the second image display screen. The two image display screens are connected to provide power for the image display screen through built-in or external power supply. 6. The head-mounted display device according to claim 5, characterized in that, the head-mounted display device further comprises a peripheral connection module, and the peripheral connection module connects the head-mounted display The device is connected with an electronic device with a playback function to obtain information to be displayed. 7. The head-mounted display device according to claim 5, wherein the surface of the planar total reflection mirror is coated with a total reflection film. 8 . The head-mounted display device according to claim 5 , wherein a diopter adjuster is installed near the eye end of the head-mounted display device. 9 . The head-mounted display device according to claim 5 , wherein buckles are respectively provided on both sides of the housing for fastening the head-mounted stretchable belt or the support frame. 10 . The head-mounted display device according to claim 5 , wherein a buckle is provided above the casing for fastening the head-mounted stretchable strap or the support frame. 11 .