Optical module, optical system and head-mounted display device

Abstract

The present application relates to the field of optical display technology, and provides an optical module, an optical system, and a head-mounted display device, wherein the optical module includes a first display area, a second display area, a partially transmissive and partially reflective component, an optical path redirecting component, and an eyepiece, wherein the partially transmissive and partially reflective component transmits the second image, the optical path redirecting component redirects the first image and images it on one side of the partially transmissive and partially reflective component to form an equivalent image plane corresponding to the first image, and the eyepiece overlaps the reflected equivalent image plane on the image presented by the second image. When in use, the optical path redirecting component redirects the first image and images it on one side of the partially transmissive and partially reflective component to form an equivalent image plane, and the partially transmissive and partially reflective component can reflect the equivalent image plane, and the reflected equivalent image plane overlaps with the second image after passing through the eyepiece. After imaging through the eyepiece, it is actually equivalent to the first image overlapping the second image.

Description

Technical Field

[0001] The present application relates to the field of optical display technology, and in particular to an optical module, an optical system and a head-mounted display device. Background Art

[0002] In recent years, due to the development of virtual reality and augmented reality technology, people have higher and higher requirements for the virtual environment constructed by virtual reality or augmented reality devices, and higher and higher requirements for the clarity of the pictures they see. However, the limitations of the current existing display technology cannot take into account both high-resolution display and large field of view display at the same time. When the human eye views an image, only the resolution of the image in the central field of view or a specific area is required to be high, and the larger the field of view within the field of view, the better the overall viewing experience, but the display solution with a large field of view cannot achieve high-resolution display. Therefore, in this field, how to simultaneously perform a large field of view display and a high-resolution display of a specific area is a technical problem that needs to be solved. Summary of the invention

[0003] In view of this, the present application provides an optical module, an optical system and a head-mounted display device, which can realize a large field of view display and a high-resolution display of a specific area at the same time.

[0004] In the first aspect, the present application provides an optical module, comprising: a first display area, emitting a first image; a second display area, emitting a second image, the second display area being adjacently arranged on one side of the first display area; a partially transmissive and partially reflective component, arranged within a light emitting range of the second display area, the partially transmissive and partially reflective component being configured to transmit the second image; an optical path redirecting component having a positive optical focal length, the optical path redirecting component being arranged within a light emitting range of the first display area, the optical path redirecting component being configured to redirect the first image and image it on one side of the partially transmissive and partially reflective component to form an equivalent image plane corresponding to the first image; wherein the partially transmissive and partially reflective component is configured to reflect the equivalent image plane; and an eyepiece, arranged within the light emitting range of the second display area; the reflection direction of the equivalent image plane by the partially transmissive and partially reflective component is toward the eyepiece; the eyepiece is configured to image the second image, and overlap the equivalent image plane reflected by the partially transmissive and partially reflective component on the image presented by the second image.

[0005] When this aspect is used, after the first display area emits the first image, the optical path redirecting component redirects the first image and images it on one side of the partially transmitting and partially reflecting component to form an equivalent image plane, and the partially transmitting and partially reflecting component can reflect the equivalent image plane, and the reflected equivalent image plane overlaps with the second image after passing through the eyepiece. After imaging through the eyepiece, it is actually equivalent to the first image overlapping the second image. Through the overlap of images, this aspect can improve the resolution of a certain area in the image after passing through the eyepiece, and realize high-definition display of a specific area. Specifically, the first image after passing through the eyepiece can increase the pixel points of the second image after passing through the eyepiece in the spatial domain or time domain, thereby improving the resolution of the overlapping image. For example, when the human eye is in the light emitting direction of the eyepiece, the first image after passing through the eyepiece is displayed in the central field of view of the human eye to meet the high resolution requirement of the central field of view, and the second image is mainly used for large field of view image display. The optical path redirecting component and the partially transmitting and partially reflecting component can provide the first image of the first display area to the central field of view to realize high-resolution display at the central field of view, and the eyepiece images the second image for large field of view image display. The size of the second display area can be selected to be a larger display screen, so as to achieve a large field of view image display.

[0006] In combination with the first aspect, in a possible implementation, the optical path redirecting component includes: a semi-transparent and semi-reflective mirror, which is tilted within the light emitting range of the first display area, and the first acute angle between the plane where the semi-transparent and semi-reflective mirror is located and the plane where the first display area is located is any value between 40 degrees and 50 degrees; and a first focusing structure, which is arranged within the range directed by the first acute angle and outside the light emitting range of the first display area; wherein the partially transmissive and partially reflective component is a partially transmissive and partially reflective mirror, and the partially transmissive and partially reflective component is located within the reflection range of the first focusing structure.

[0007] In combination with the first aspect, in a possible implementation, the optical path redirecting component includes: a first polarizer, arranged within the light emitting range of the first display area; a first quarter wave plate, arranged within the light emitting range of the first polarizer; a second quarter wave plate, arranged within the light emitting range of the first polarizer; a first polarization selection plate, arranged within the light emitting range of the first polarizer, the first polarization selection plate is tilted relative to the first display area, and the second acute angle between the plane where the first polarization selection plate is located and the plane where the first display area is located is any value between 40 degrees and 50 degrees; the first polarization selection plate is constructed to: reflect polarized light opposite to the polarization state corresponding to the first polarizer, and transmit polarized light corresponding to the polarization state of the first polarizer; and a second focusing structure, arranged within the range directed by the second acute angle and outside the light emitting range of the first display area; the first quarter wave plate is located outside the reflection range of the second focusing structure, and the second quarter wave plate is located within the reflection range of the second focusing structure; wherein the partially transmitting and partially reflecting component is located within the reflection range of the second focusing structure.

[0008] In combination with the first aspect, in a possible implementation, the partially transmissive and partially reflective component includes: a first half-wave plate; and a second polarization selection plate, which is tilted relative to the second display area, and the third acute angle between the plane where the second polarization selection plate is located and the plane where the second display area is located is any value between 40 degrees and 50 degrees; the second polarization selection plate is constructed to: reflect polarized light with a polarization state opposite to that corresponding to the first polarizer, and transmit polarized light with a polarization state corresponding to the first polarizer; wherein the second display area emits the second image with a polarization state corresponding to the first polarizer.

[0009] In combination with the first aspect, in a possible implementation, the partially transmissive and partially reflective component includes: a third polarization selection plate, which is tilted relative to the second display area, and the fourth acute angle between the plane where the third polarization selection plate is located and the plane where the second display area is located is any value between 40 degrees and 50 degrees; the third polarization selection plate is constructed to: reflect polarized light in the polarization state corresponding to the first polarizer, and transmit polarized light in the polarization state opposite to that corresponding to the first polarizer.

[0010] In combination with the first aspect, in a possible implementation, the optical path redirecting component includes: a second polarizer, which is arranged within the light emitting range of the first display area; a fourth polarization selection plate, which is arranged within the light emitting range of the second polarizer, the fourth polarization selection plate is inclined relative to the first display area, and the fifth acute angle between the plane where the fourth polarization selection plate is located and the plane where the first display area is located is any value between 40 degrees and 50 degrees; the fourth polarization selection plate is constructed to: reflect polarized light of the polarization state corresponding to the second polarizer, and transmit polarized light of the polarization state opposite to that corresponding to the second polarizer; a third quarter wave plate, which is arranged within the range directed by the fifth acute angle and outside the light emitting range of the first display area; and a third focusing structure, which is arranged within the range directed by the fifth acute angle, and the third quarter wave plate is located in the reflection direction of the third focusing structure; wherein the partially transmitting and partially reflecting component is located in the reflection direction of the third focusing structure.

[0011] In combination with the first aspect, in a possible implementation, the partially transmissive and partially reflective component includes: a second half-wave plate, arranged in the reflection direction of the third focusing structure; and a fifth polarization selection plate, arranged in the reflection direction of the third focusing structure, the fifth polarization selection plate is tilted relative to the second display area, and the sixth acute angle between the plane where the fifth polarization selection plate is located and the plane where the second display area is located is any value between 40 degrees and 50 degrees; the fifth polarization selection plate is constructed to: reflect polarized light in the polarization state corresponding to the second polarizer, and transmit polarized light in the polarization state opposite to that corresponding to the second polarizer.

[0012] In combination with the first aspect, in a possible implementation, the partially transmissive and partially reflective component includes: a sixth polarization selection plate, which is arranged in the reflection direction of the third focusing structure, the sixth polarization selection plate is tilted relative to the second display area, and the seventh acute angle between the plane where the sixth polarization selection plate is located and the plane where the second display area is located is any value between 40 degrees and 50 degrees; the sixth polarization selection plate is constructed to: reflect polarized light with a polarization state opposite to that corresponding to the second polarizer, and transmit polarized light with a polarization state corresponding to the second polarizer.

[0013] In combination with the first aspect, in a possible implementation manner, the optical path redirecting component further includes: a prism, and the second polarizer, the fourth polarization selection plate and the third quarter wave plate are respectively attached to three surfaces of the prism.

[0014] In combination with the first aspect, in a possible implementation manner, the first display area and the second display area are respectively different display areas in a single display screen.

[0015] In combination with the first aspect, in a possible implementation, the optical module further includes: a processing module electrically connected to the first display area and the second display area respectively, and the processing module is configured to control the first display area and the second display area to work in an alternating manner.

[0016] In a second aspect, the present application provides an optical system, comprising the aforementioned optical module and a display panel, wherein the first display area and the second display area are respectively displayed on the display panel.

[0017] The optical system provided in the second aspect of the present application includes the optical module in any of the above-mentioned implementation modes, and thus has the technical effects of any of the above-mentioned optical modules, which will not be described in detail here.

[0018] In combination with the second aspect, in a possible implementation manner, the first display area is displayed on a central area of ​​the display panel, and the second display area is displayed on an edge area of ​​the display panel.

[0019] In combination with the second aspect, in a possible implementation, the display panel includes a first display panel and a second display panel, the first display area is displayed on the first display panel, the second display area is displayed on the second display panel, and the resolution of the first display panel is greater than the resolution of the second display panel.

[0020] In a third aspect, the present application provides a head-mounted display device, comprising: the aforementioned optical system; a processing module, configured to respectively control the first display area and the second display area to perform display work; a camera, electrically connected to the processing module; and a signal input module, electrically connected to the processing module.

[0021] The head-mounted display device provided in the third aspect of the present application includes the optical system in any of the above-mentioned implementation methods, and therefore has the technical effects of any of the above-mentioned optical systems, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shown is a schematic structural diagram of an optical module provided in one embodiment of the present application.

[0023] Figure 2 Shown is a schematic diagram of the optical module structure provided in another embodiment of the present application.

[0024] Figure 3 Shown Figure 2 Schematic diagram of the simplified optical module structure.

[0025] Figure 4Shown is a schematic diagram of the optical module structure provided in another embodiment of the present application.

[0026] Figure 5 Shown Figure 4 Schematic diagram of the simplified optical module structure.

[0027] Figure 6 Shown is a structural schematic diagram of an optical module provided in another embodiment of the present application.

[0028] Figure 7 Shown is a schematic diagram of the optical module structure provided in another embodiment of the present application.

[0029] Figure 8 Shown Figure 7 Schematic diagram of the simplified optical module structure.

[0030] Fig. 9 Shown is a schematic diagram of the optical module structure provided in another embodiment of the present application.

[0031] Fig.10 Shown Fig. 9 Schematic diagram of the simplified optical module structure.

[0032] Fig.11 Shown Figure 1 The corresponding approximate optical path diagram.

[0033] Fig.12 Shown is a schematic structural diagram of a head mounted display device of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] Embodiment 1

[0036] Figure 1 Shown is a schematic structural diagram of an optical module provided in one embodiment of the present application. Figure 2 Shown is a schematic diagram of the optical module structure provided in another embodiment of the present application. Figure 3 Shown Figure 2 Schematic diagram of the simplified optical module structure. Figure 4 Shown is a schematic diagram of the optical module structure provided in another embodiment of the present application. Figure 5 Shown Figure 4 Schematic diagram of the simplified optical module structure. Figure 6 Shown is a structural schematic diagram of an optical module provided in another embodiment of the present application. Figure 7 Shown is a schematic diagram of the optical module structure provided in another embodiment of the present application. Figure 8 Shown Figure 7 Schematic diagram of the simplified optical module structure. Fig. 9 Shown is a schematic diagram of the optical module structure provided in another embodiment of the present application. Fig.10 Shown Fig. 9 Schematic diagram of the simplified optical module structure.

[0037] In one embodiment, the present application provides an optical module, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the straight line of the arrow in the figure indicates the approximate direction of the light path, and the optical module includes a first display area 1, a second display area 2, a partially transmissive and partially reflective component 3, an optical path redirecting component 4 and an eyepiece 5. Among them, the first display area 1 emits a first image. The second display area 2 emits a second image, and the second display area 2 is adjacent to one side of the first display area 1. The partially transmissive and partially reflective component 3 is arranged within the light emitting range of the second display area 2, and the partially transmissive and partially reflective component 3 is configured to transmit the second image. The optical path redirecting component 4 has a positive optical focal length, and the optical path redirecting component 4 is arranged within the light emitting range of the first display area 1. The optical path redirecting component 4 is configured to redirect the first image and image it on one side of the partially transmissive and partially reflective component 3 to form an equivalent image plane corresponding to the first image. Among them, the partially transmissive and partially reflective component 3 is configured to reflect the equivalent image plane. The eyepiece 5 is arranged within the light emitting range of the second display area 2; the reflection direction of the equivalent image plane of the partially transmissive and partially reflective component 3 is toward the eyepiece 5; the eyepiece 5 is constructed to: image the second image, and overlap the equivalent image plane reflected by the partially transmissive and partially reflective component 3 on the image presented by the second image.

[0038] When this embodiment is in use, after the first display area 1 emits the first image, the optical path redirecting component 4 redirects the first image and forms an image on one side of the partially transmissive and partially reflective component 3 to form an equivalent image plane, and the partially transmissive and partially reflective component 3 can then reflect the equivalent image plane, and the reflected equivalent image plane overlaps with the second image after passing through the eyepiece 5. After the image is formed through the eyepiece 5, it is actually equivalent to the first image overlapping the second image. Through the overlap of the images, this embodiment can improve the resolution of a certain area in the image after passing through the eyepiece 5, and realize high-definition display of a specific area.

[0039] Specifically, the first image after passing through the eyepiece 5 can increase the pixel points of the second image after passing through the eyepiece 5 in the spatial domain or the temporal domain, thereby improving the resolution of the overlapping images. For example, when the human eye is in the light emitting direction of the eyepiece 5, the first image after passing through the eyepiece 5 is displayed in the central field of view of the human eye to meet the high resolution requirement of the central field of view, and the second image is mainly used for large field of view image display. The optical path redirection component 4 and the partially transmitting and partially reflecting component 3 can provide the first image of the first display area 1 to the central field of view to achieve high-resolution display in the central field of view. The eyepiece 5 images the second image and displays the image in a large field of view. The size of the second display area 2 can be selected to use a larger display screen, thereby achieving large field of view image display.

[0040] In the scheme for improving the resolution of overlapping images, if the resolution of the image is improved in the spatial domain, the first display area 1 and the second display area 2 work simultaneously, and each pixel point of the first image after passing through the eyepiece 5 and each pixel point of the corresponding area in the second image are staggered by half a pixel, thereby improving the pixel density of the overlapping area.

[0041] If the image resolution is improved in the time domain, a processing module with a control function is introduced, and the processing module is electrically connected to the first display area 1 and the second display area 2 respectively, and the processing module is configured to control the first display area 1 and the second display area 2 to work in an interlaced manner. During operation, each pixel point of the first image after the eyepiece 5 and each pixel point of the corresponding area in the second image are staggered by half a pixel point, and the first display area 1 and the second display area 2 are displayed in an interlaced manner, and the interlaced first image and second image form a frame. As long as the display time of each frame of the image is less than or equal to 1 / 24 second, a continuous and smooth high-resolution viewing experience can be achieved.

[0042] In a solution for improving the resolution of overlapping images, in one embodiment, the first display area 1 and the second display area 2 may be two independent display screens, the resolution of the first display area 1 is greater than the resolution of the second display area 2, and the first display area 1 and the second display area 2 are displayed half a pixel apart, thereby improving the image resolution of the overlapping area. The first display area 1 and the second display area 2 may also be displayed on a separate display screen, and the first display area 1 and the second display area 2 may be displayed alternately, and both are displayed half a pixel apart, thereby improving the image resolution of the overlapping area in the time domain.

[0043] Alternatively, if Figure 1 and Figure 6As shown, the optical path redirection component 4 includes a semi-transparent and semi-reflective mirror 401 and a first focusing structure 402. The semi-transparent and semi-reflective mirror 401 is tilted and arranged within the light emitting range of the first display area 1, and the first acute angle between the plane where the semi-transparent and semi-reflective mirror 401 is located and the plane where the first display area 1 is located is any value between 40 degrees and 50 degrees. The first focusing structure 402 is arranged within the range to which the first acute angle is directed and outside the light emitting range of the first display area 1. The partially transmissive and partially reflective component 3 is a partially transmissive and partially reflective mirror, and the partially transmissive and partially reflective component 3 is located within the reflection range of the first focusing structure 402.

[0044] In this embodiment, the first image emitted from the first display area 1 is irradiated on the semi-transparent mirror 401, and the semi-transparent mirror 401 partially reflects the first image, and the reflected first image is irradiated on the first focusing structure 402. The first focusing structure 402 focuses the received first image and images it on one side of the partially transmissive and partially reflective mirror. The partially transmissive and partially reflective mirror then reflects the equivalent image plane toward the eyepiece 5, and the equivalent image plane after reflection passes through the eyepiece 5 for imaging. Among them, the first image focused by the first focusing structure 402 may be partially or completely irradiated on the semi-transmissive and semi-reflective mirror 401, but the semi-transmissive and semi-reflective mirror 401 can allow partial light transmission, so the semi-transmissive and semi-reflective mirror 401 will not affect the overlapping imaging of the first image on the second image. In this embodiment, the semi-transmissive and semi-reflective mirror 401 and the first focusing structure 402 cooperate to redirect and focus the first image on one side of the partially transmissive and partially reflective mirror, and the partially transmissive and partially reflective mirror then reflects the equivalent image plane to the eyepiece 5 for imaging, thereby realizing the overlapping imaging of the first image and the second image.

[0045] Specifically, the angles of each device are set as follows: the acute angle between the plane where the semi-transparent and semi-reflective mirror 401 is located and the plane where the first display area 1 is located is about 45°, the central optical axis of the first focusing structure 402 is basically parallel to the first display area 1, and the acute angle between the plane where the partially transmissive and partially reflective mirror is located and the plane where the second display area 2 is located is about 45°. With such device angle settings, the entire optical module is relatively space-saving, and can achieve redirection, focusing, and overlapping imaging of the first image with the second image in a relatively small volume.

[0046] Alternatively, if Figure 2 and Figure 7As shown, the optical path redirection component 4 includes a first polarizer 403, a first quarter wave plate 404, a second quarter wave plate 405, a first polarization selection plate 406 and a second focusing structure 407. The first polarizer 403 is arranged within the light emitting range of the first display area 1. The first quarter wave plate 404 is arranged within the light emitting range of the first polarizer 403. The second quarter wave plate 405 is arranged within the light emitting range of the first polarizer 403. The first polarization selection plate 406 is arranged within the light emitting range of the first polarizer 403, and the first polarization selection plate 406 is arranged obliquely relative to the first display area 1, and the second acute angle between the plane where the first polarization selection plate 406 is located and the plane where the first display area 1 is located is any value between 40 degrees and 50 degrees; the first polarization selection plate 406 is constructed to: reflect polarized light opposite to the polarization state corresponding to the first polarizer 403, and transmit polarized light corresponding to the polarization state of the first polarizer 403. The second focusing structure 407 is arranged within the range oriented by the second acute angle and outside the light emitting range of the first display area 1. The first quarter wave plate 404 is located outside the reflection range of the second focusing structure 407, and the second quarter wave plate 405 is located within the reflection range of the second focusing structure 407. Among them, the partially transmissive and partially reflective component 3 is located within the reflection range of the second focusing structure 407.

[0047] When this embodiment is in use, the first polarizer 403 adjusts the first image emitted from the first display area 1 to linear polarization, for example, to P linear polarization. The P linear polarization passes through the first quarter wave plate 404 and becomes circular polarization, and the circular polarization passes through the second quarter wave plate 405 and becomes S linear polarization. Then the first polarization selection plate 406 reflects the S linear polarization to the second focusing structure 407. During the reflection process, the S linear polarization passes through the second quarter wave plate 405 again and becomes circular polarization. The circular polarization is focused and reflected by the second focusing structure 407 and passes through the second quarter wave plate 405 for the third time and becomes P linear polarization. The P linear polarization can then transmit the first polarization selection plate 406 and focus to form an equivalent image plane corresponding to the first image on one side of the partially transmitting and partially reflecting component 3. The partially transmitting and partially reflecting component 3 then reflects the equivalent image plane and displays it overlapping with the second image, so that it can be used to improve the resolution of a partial area of ​​the second image.

[0048] The first quarter wave plate 404 is located outside the reflection range of the second focusing structure 407, which can prevent the circular polarized light reflected by the second focusing structure 407 from passing through the first quarter wave plate 404. The second quarter wave plate 405 is located within the reflection range of the second focusing structure 407, which ensures that the circular polarized light reflected by the second focusing structure 407 can pass through the second quarter wave plate 405. The second focusing structure 407 is located outside the light emitting range of the first display area 1, which can ensure that the first image emitted from the first display area 1 and the linear polarized light after passing through the first polarizer 403 will not be reflected by the second focusing structure 407. Specifically, the acute angle between the plane where the first polarization selection plate 406 is located and the plane where the first display area 1 is located is preferably about 45 degrees, and the entire optical module is more space-saving, and can realize the redirection, focusing and overlapping imaging of the first image with the second image in a smaller volume. The first polarization selection plate 406 adopts a polarization selection film, the second quarter wave plate 405 and the first polarization selection plate 406 are attached to each other, and the second quarter wave plate 405 provides support for the first polarization selection plate 406.

[0049] Alternatively, if Figure 2 and Figure 7 As shown, the partially transmissive and partially reflective component 3 includes a first half-wave plate 301 and a second polarization selection plate 302. The second polarization selection plate 302 is tilted relative to the second display area 2, and the third acute angle between the plane where the second polarization selection plate 302 is located and the plane where the second display area 2 is located is any value between 40 degrees and 50 degrees. The second polarization selection plate 302 is configured to reflect polarized light opposite to the polarization state corresponding to the first polarizer 403, and transmit polarized light corresponding to the polarization state of the first polarizer 403. The second display area 2 emits a second image corresponding to the polarization state of the first polarizer 403.

[0050] When this embodiment is in use, the polarization state of the equivalent image plane is reversed after passing through the first half wave plate 301, and then reflected by the second polarization selection plate 302. Specifically, for example, when the equivalent image plane is P-line polarization, the first half wave plate 301 reverses the P-line polarization into S-line polarization, and the S-line polarization is then reflected by the second polarization selection plate 302, and the second polarization selection plate 302 can transmit the second image emitted from the second display area 2. Specifically, a polarizer can be provided on the second display area 2 to adjust the polarization state of the second image to the polarization state corresponding to the first polarizer 403. Specifically, the acute angle between the plane where the second polarization selection plate 302 is located and the plane where the second display area 2 is located is about 45 degrees, which can save space. The second polarization selection plate 302 adopts a polarization selection film, the first half wave plate 301 and the second polarization selection plate 302 are attached to each other, and the first half wave plate 301 provides support for the second polarization selection plate 302.

[0051] Alternatively, if Figure 3and Figure 8 As shown, the partially transmissive and partially reflective component 3 includes a third polarization selection plate 303, which is tilted relative to the second display area 2, and the fourth acute angle between the plane where the third polarization selection plate 303 is located and the plane where the second display area 2 is located is any value between 40 degrees and 50 degrees; the third polarization selection plate 303 is constructed to: reflect polarized light of the polarization state corresponding to the first polarizer 403, and transmit polarized light of the polarization state opposite to that corresponding to the first polarizer 403.

[0052] In this embodiment, there is no need to use a half-wave plate, and the third polarization selection plate 303 can directly reflect the equivalent image plane. For example, the third polarization selection plate 303 directly reflects the equivalent image plane of the P-line polarized light. Specifically, a glass plate can be provided to support the third polarization selection plate 303. At the same time, the third polarization selection plate 303 transmits the second image emitted from the second display area 2. Specifically, a polarizer can be provided on the second display area 2 to adjust the polarization state of the second image to polarized light opposite to the polarization state of the first polarizer 403.

[0053] Alternatively, if Figure 4 and Fig. 9 As shown, the optical path redirection component 4 includes a second polarizer 408, a fourth polarization selection plate 409, a third quarter wave plate 410 and a third focusing structure 411. The second polarizer 408 is arranged within the light exit range of the first display area 1. The fourth polarization selection plate 409 is arranged within the light exit range of the second polarizer 408, and the fourth polarization selection plate 409 is arranged obliquely relative to the first display area 1, and the fifth acute angle between the plane where the fourth polarization selection plate 409 is located and the plane where the first display area 1 is located is any value between 40 degrees and 50 degrees; the fourth polarization selection plate 409 is constructed to: reflect the polarized light corresponding to the polarization state of the second polarizer 408, and transmit the polarized light opposite to the polarization state corresponding to the second polarizer 408. The third quarter wave plate 410 is arranged within the range to which the fifth acute angle is directed and outside the light exit range of the first display area 1. The third focusing structure 411 is arranged within the range to which the fifth acute angle is directed, and the third quarter wave plate 410 is located in the reflection direction of the third focusing structure 411. The partially transmissive and partially reflective component 3 is located in the reflection direction of the third focusing structure 411 .

[0054] When this embodiment is in use, the second polarizer 408 adjusts the first image emitted from the first display area 1 to linear polarization, for example, to P linear polarization. Since the third quarter wave plate 410 is arranged outside the light emitting range of the first display area 1, the P linear polarization passing through the second polarizer 408 will not pass through the third quarter wave plate 410, but will be irradiated on the fourth polarization selection plate 409, and the fourth polarization selection plate 409 will reflect the P linear polarization to the third focusing structure 411. When the P linear polarization passes through the third quarter wave plate 410 on the path of the third focusing structure 411, it is converted into circular polarization. The third focusing structure 411 focuses and reflects the circular polarization, and the circular polarization that has been focused and reflected is converted into S linear polarization through the third quarter wave plate 410, and the S linear polarization can transmit the fourth polarization selection plate 409. After the S linear polarization transmits the fourth polarization selection plate 409, it is focused and imaged on one side of the partially transmitting and partially reflecting component 3 to form an equivalent image plane corresponding to the first image. The partially transmissive and partially reflective component 3 then reflects the equivalent image plane and displays it overlapping with the second image, thereby improving the resolution of a portion of the second image. The acute angle between the plane where the fourth polarization selection plate 409 is located and the plane where the first display area 1 is located is about 45 degrees, thereby saving space.

[0055] Alternatively, if Figure 4 and Fig. 9 As shown, the partially transmissive and partially reflective component 3 includes a second half wave plate 304 and a fifth polarization selection plate 305. The second half wave plate 304 is arranged in the reflection direction of the third focusing structure 411. The fifth polarization selection plate 305 is arranged in the reflection direction of the third focusing structure 411, and the fifth polarization selection plate 305 is arranged obliquely relative to the second display area 2, and the sixth acute angle between the plane where the fifth polarization selection plate 305 is located and the plane where the second display area 2 is located is any value between 40 degrees and 50 degrees; the fifth polarization selection plate 305 is constructed to reflect polarized light corresponding to the polarization state of the second polarizer 408, and transmit polarized light opposite to the polarization state corresponding to the second polarizer 408.

[0056] When this embodiment is used, the polarization state of the equivalent image plane is reversed after passing through the second half wave plate 304, and then reflected by the fifth polarization selection plate 305. Specifically, for example, when the equivalent image plane is S-line polarization, the second half wave plate 304 reverses the S-line polarization to P-line polarization, and the P-line polarization is then reflected by the fifth polarization selection plate 305, and the fifth polarization selection plate 305 can transmit the second image emitted from the second display area 2. Specifically, a polarizer can be provided on the second display area 2 to adjust the polarization state of the second image to be opposite to the polarization state corresponding to the second polarizer 408, that is, the polarized light of the fifth polarization selection plate 305 can be transmitted. Specifically, the acute angle between the plane where the fifth polarization selection plate 305 is located and the plane where the second display area 2 is located is about 45 degrees, which can save space. The fifth polarization selection plate 305 adopts a polarization selection film, the second half wave plate 304 and the fifth polarization selection plate 305 are attached to each other, and the second half wave plate 304 provides support for the fifth polarization selection plate 305.

[0057] Alternatively, if Figure 5 and Fig.10 As shown, the partially transmissive and partially reflective component 3 includes a sixth polarization selection plate 306, which is arranged in the reflection direction of the third focusing structure 411, and the sixth polarization selection plate 306 is tilted relative to the second display area 2, and the seventh acute angle between the plane where the sixth polarization selection plate 306 is located and the plane where the second display area 2 is located is any value between 40 degrees and 50 degrees; the sixth polarization selection plate 306 is constructed to: reflect polarized light with a polarization state opposite to that corresponding to the second polarizer 408, and transmit polarized light with a polarization state corresponding to the second polarizer 408.

[0058] In this embodiment, there is no need to use a half wave plate, and the sixth polarization selection plate 306 can directly reflect the equivalent image plane, for example, the sixth polarization selection plate 306 directly reflects the equivalent image plane of S-line polarization. Specifically, a glass plate can be provided to support the sixth polarization selection plate 306.

[0059] Alternatively, if Figure 4 , Figure 5 , Fig. 9 and Fig.10 As shown, the optical path redirection component 4 further includes a prism 412, and the second polarizer 408, the fourth polarization selection plate 409 and the third quarter wave plate 410 are respectively attached to three surfaces of the prism 412. In this embodiment, the prism 412 can provide support for the second polarizer 408, the fourth polarization selection plate 409 and the third quarter wave plate 410, and fix the positions of the three to prevent displacement.

[0060] Alternatively, if Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the first display area 1 and the second display area 2 are two adjacent display screens. When in use, this embodiment can independently control the display content and display parameters of the first display area 1 and the second display area 2, making the process of synthesizing images and the adjustment work more flexible.

[0061] Alternatively, if Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the first display area 1 and the second display area 2 are different display areas in a single display screen. When this embodiment is used, the number of display panels can be saved, and only a single display screen is needed, which can reduce the cost of the entire optical module. In order to more clearly express the different display areas in a single display screen, Figures 6 to 10 In the figure, a short line is drawn between the first display area 1 and the second display area 2 to separate and represent the two panels.

[0062] Optionally, the first focusing structure 402, the second focusing structure 407 and the third focusing structure 411 may be focusing and reflecting devices with positive optical power, such as concave reflectors, cylindrical reflectors, and plano-convex lenses.

[0063] Fig.11 Shown Figure 1 The corresponding approximate optical path diagram. Fig.11 As shown, a schematic diagram of the optical path of the whole process is shown. The optical path emitted from the first display area 1 forms an equivalent image plane corresponding to the first image on one side of the partially transmissive and partially reflective component 3 after passing through the optical path redirecting component 4. The equivalent image plane is imaged through the eyepiece 5 after being reflected by the partially transmissive and partially reflective component 3. The image light of a part of the second display area 2 is transmitted through the partially transmissive and partially reflective component 3 and then imaged through the eyepiece 5.

[0064] Embodiment 2

[0065] The present invention provides an optical system, which includes the aforementioned optical module and a display panel, wherein a first display area and a second display area are respectively displayed on the display panel, and a user can view images through the optical system. Specifically, the optical system may include two optical modules, wherein the two optical modules serve as a left-eye viewing component and a right-eye viewing component, respectively, and the left-eye viewing component and the right-eye viewing component are symmetrically distributed. When in use, the left eye and the right eye of the user view images from the two optical modules respectively.

[0066] In one embodiment, the first display area is displayed on the central area of ​​the display panel, and the second display area is displayed on the edge area of ​​the display panel, so that the resolution of the central area can be improved. In this embodiment, a single display panel is included, and the single display panel is used to perform display work of the first display area and the second display area, that is, the single display panel is used to display the first image and the second image at the same time, and only one display panel is used to reduce the cost of the optical system.

[0067] In one embodiment, the display panel includes a first display panel and a second display panel, the first display area is displayed on the first display panel, the second display area is displayed on the second display panel, and the resolution of the first display panel is greater than the resolution of the second display panel. In this embodiment, two independent display panels are included, and the two independent display panels are used to perform display work in the first display area and the second display area, that is, the two independent display panels are used to display the first image and the second image, respectively.

[0068] Embodiment 3

[0069] The present invention also provides a head-mounted display device, including the aforementioned optical system, wherein the head-mounted component includes a glasses frame, the glasses frame includes temples, and the optical system is fixed between the temples. In this embodiment, the temples can be hung on the user's ears, so that the head-mounted display device can be conveniently worn on the user's head to provide the user with virtual reality display or augmented reality display. The number of optical systems can be two, and the two optical systems serve as a left-eye viewing component and a right-eye viewing component, respectively, and the left-eye viewing component and the right-eye viewing component are symmetrically distributed on the left and right. When in use, the user's left eye and right eye view images from the two optical systems respectively.

[0070] Optionally, the head-mounted display device further includes a housing and a camera, the camera is electrically connected to the processing module, the optical system is contained in the housing, and the housing can effectively protect the optical system and prevent damage to the optical system. The lens of the camera faces the human eye, and the camera can be used to perform an eye tracking function. When the head-mounted display device is working, the camera always captures the human eye, thereby obtaining the real-time gaze point position of the human eye.

[0071] Fig.12 FIG. 2 is a schematic diagram of the structure of the head mounted display device of the present invention. Fig.12As shown, the head-mounted display device includes a signal input module 13, and the head-mounted display device receives the signal of the signal input module 13 and processes the signal. The signal input module 13 includes an operation controller electrically connected to the head-mounted display device, and the operation controller can specifically be a handle controller. Optionally, the head-mounted display device also includes a processing module 14, and the signal input module 13 is electrically connected to the processing module 14, and the processing module 14 is used to control the operation controller and the display content of the first display area and the second display area.

[0072] In some embodiments, Fig.12 As shown, the head mounted display device further includes a memory 15 , the processing module 14 is electrically connected to the first display area 1 , the second display area 2 and the signal input module 13 , respectively, and the memory 15 is used to store executable instructions of the processing module 14 .

[0073] When in use, the processing module 14 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the head mounted display device to perform desired functions.

[0074] The memory 15 may include one or more computer program products, and the computer program products may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and / or cache memory (cache), etc. Non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processing module 14 may run the program instructions to control the first display area 1 and the second display area 2 to display the first image and the second image respectively.

[0075] The signal input module 13 may be interconnected with the processing module 14 via a bus system and / or other forms of connection mechanisms (not shown). The signal input module 13 may include, for example, a keyboard, a mouse, a joystick, a touch screen, and the like.

[0076] Of course, to simplify, Fig.12 Only some of the components related to the present invention in the head mounted display device are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, the head mounted display device may further include any other appropriate components according to specific application conditions.

[0077] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0078] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0079] It should also be noted that in the device and apparatus of the present application, each component can be decomposed and / or reassembled, and these decompositions and / or reassemblies should be regarded as equivalent solutions of the present application.

[0080] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features of the present application.

[0081] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An optical module, characterized in that: include: A first display area, emitting a first image; a second display area for emitting a second image, wherein the second display area is adjacently arranged on one side of the first display area; A partially transmissive and partially reflective component is disposed within a light emitting range of the second display area, and the partially transmissive and partially reflective component is configured to transmit the second image; an optical path redirecting component having positive optical power, the optical path redirecting component being arranged within the light emitting range of the first display area, the optical path redirecting component being configured to redirect the first image and image the image on one side of the partially transmissive and partially reflective component to form an equivalent image plane corresponding to the first image; wherein the partially transmissive and partially reflective component is configured to reflect the equivalent image plane; and An eyepiece is arranged within the light emitting range of the second display area; the reflection direction of the equivalent image plane by the partially transmissive and partially reflective component is toward the eyepiece; the eyepiece is configured to: image the second image, and overlap the equivalent image plane reflected by the partially transmissive and partially reflective component on the image presented by the second image; The optical path redirecting component comprises: a semi-transparent and semi-reflective mirror, which is tiltedly arranged within the light emitting range of the first display area, and the first acute angle between the plane where the semi-transparent and semi-reflective mirror is located and the plane where the first display area is located is any value between 40 degrees and 50 degrees; and a first focusing structure, which is arranged within the range directed by the first acute angle and outside the light emitting range of the first display area; wherein the partially transmissive and partially reflective component is a partially transmissive and partially reflective mirror, and the partially transmissive and partially reflective component is located within the reflection range of the first focusing structure; or The optical path redirecting component includes: a first polarizer, which is arranged within the light emitting range of the first display area; a first quarter wave plate, which is arranged within the light emitting range of the first polarizer; a second quarter wave plate, which is arranged within the light emitting range of the first polarizer; a first polarization selection plate, which is arranged within the light emitting range of the first polarizer, the first polarization selection plate is arranged obliquely relative to the first display area, and the second acute angle between the plane where the first polarization selection plate is located and the plane where the first display area is located is any value between 40 degrees and 50 degrees; the first polarization selection plate is constructed to: reflect polarized light opposite to the polarization state corresponding to the first polarizer, and transmit polarized light corresponding to the polarization state of the first polarizer; and a second focusing structure, which is arranged within the range of the second acute angle and outside the light emitting range of the first display area; the first quarter wave plate is located outside the reflection range of the second focusing structure, and the second quarter wave plate is located within the reflection range of the second focusing structure; wherein the partially transmitting and partially reflecting component is located within the reflection range of the second focusing structure; or The optical path redirecting component includes: a second polarizer, which is arranged within the light emitting range of the first display area; a fourth polarization selection plate, which is arranged within the light emitting range of the second polarizer, the fourth polarization selection plate is arranged obliquely relative to the first display area, and the fifth acute angle between the plane where the fourth polarization selection plate is located and the plane where the first display area is located is any value between 40 degrees and 50 degrees; the fourth polarization selection plate is constructed to: reflect polarized light of the polarization state corresponding to the second polarizer, and transmit polarized light of the polarization state opposite to that corresponding to the second polarizer; a third quarter wave plate, which is arranged within the range directed by the fifth acute angle and outside the light emitting range of the first display area; and a third focusing structure, which is arranged within the range directed by the fifth acute angle, and the third quarter wave plate is located in the reflection direction of the third focusing structure; wherein the partially transmitting and partially reflecting component is located in the reflection direction of the third focusing structure.

2. The optical module according to claim 1, characterized in that: The partially transmissive and partially reflective component comprises: a first half wave plate; and The second polarization selection plate is tilted relative to the second display area, and the third acute angle between the plane where the second polarization selection plate is located and the plane where the second display area is located is any value between 40 degrees and 50 degrees; the second polarization selection plate is configured to: reflect polarized light having a polarization state opposite to that corresponding to the first polarizer, and transmit polarized light having a polarization state corresponding to the first polarizer; The second display area emits the second image having a polarization state corresponding to the first polarizer.

3. The optical module according to claim 1, characterized in that: The partially transmissive and partially reflective component comprises: The third polarization selection plate is tilted relative to the second display area, and the fourth acute angle between the plane where the third polarization selection plate is located and the plane where the second display area is located is any value between 40 degrees and 50 degrees; the third polarization selection plate is constructed to: reflect polarized light in the polarization state corresponding to the first polarizer, and transmit polarized light in the polarization state opposite to that corresponding to the first polarizer.

4. The optical module according to claim 1, characterized in that: The partially transmissive and partially reflective component comprises: A second half wave plate, arranged in the reflection direction of the third focusing structure; and A fifth polarization selection plate is arranged in the reflection direction of the third focusing structure, the fifth polarization selection plate is tilted relative to the second display area, and the sixth acute angle between the plane where the fifth polarization selection plate is located and the plane where the second display area is located is any value between 40 degrees and 50 degrees; the fifth polarization selection plate is constructed to: reflect polarized light in the polarization state corresponding to the second polarizer, and transmit polarized light in the polarization state opposite to that corresponding to the second polarizer.

5. The optical module according to claim 4, characterized in that: The partially transmissive and partially reflective component comprises: A sixth polarization selection plate is arranged in the reflection direction of the third focusing structure, the sixth polarization selection plate is tilted relative to the second display area, and the seventh acute angle between the plane where the sixth polarization selection plate is located and the plane where the second display area is located is any value between 40 degrees and 50 degrees; the sixth polarization selection plate is constructed to: reflect polarized light with a polarization state opposite to that corresponding to the second polarizer, and transmit polarized light with a polarization state corresponding to the second polarizer.

6. The optical module according to claim 1, characterized in that: The optical path redirection component also includes: The second polarizer, the fourth polarization selection plate and the third quarter wave plate are respectively attached to three surfaces of the prism.

7. The optical module according to claim 1, characterized in that: The first display area and the second display area are different display areas in a single display screen.

8. The optical module according to any one of claims 1 to 7, characterized in that: Also includes: The processing module is electrically connected to the first display area and the second display area respectively, and the processing module is configured to control the first display area and the second display area to work alternately.

9. An optical system, characterized in that: include: The optical module according to any one of claims 1 to 8; as well as A display panel, wherein the first display area and the second display area are respectively displayed on the display panel.

10. The optical system according to claim 9, characterized in that: The first display area is displayed on a central area of ​​the display panel, and the second display area is displayed on an edge area of ​​the display panel.

11. The optical system according to claim 9, characterized in that The display panel includes a first display panel and a second display panel, the first display area is displayed on the first display panel, the second display area is displayed on the second display panel, and a resolution of the first display panel is greater than a resolution of the second display panel.

12. A head mounted display device, characterized in that: include: The optical system according to claim 9; A processing module, configured to control the first display area and the second display area to perform display work respectively; A camera, electrically connected to the processing module; as well as The signal input module is electrically connected to the processing module.

Images