Display device and virtual reality equipment

Abstract

The utility model discloses a display device and virtual reality equipment, and belongs to the technical field of virtual reality. The display device includes: a display panel including a plurality of display areas; the micro lens array is arranged on the display panel, the micro lens array comprises a plurality of lens groups, and each lens group comprises a plurality of micro lenses; the optical lens is located on the side, away from the display panel, of the micro-lens array; and the driving mechanism is connected with the microlens array, and the driving mechanism is used for driving each lens group to move relative to the corresponding display area within the focal length range of the microlenses.

Description

Technical Field

[0001] The present application belongs to the field of virtual reality technology, and specifically relates to a display device and a virtual reality device. Background Art

[0002] The display light machines of current virtual reality devices generally use micro-displays with various types of lenses to magnify the entire display to present virtual images.

[0003] However, lens design generally has field curvature problems, which will cause the displayed imaging plane to bend. This will cause the central field of view to be clear, but the edge field of view is not on the same imaging plane as the central field of view, resulting in the problem that the edge field of view and the central field of view cannot be clearly imaged at the same time.

[0004] In this way, there is a difference in image quality between the edge field of view and the center field of view, which reduces the display quality. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a display device and a virtual reality device that can reduce the difference in image quality between the edge field of view and the center field of view and improve the display quality.

[0006] In a first aspect, an embodiment of the present application provides a display device, comprising: a display surface including multiple display areas; a microlens array disposed on the display panel, the microlens array including multiple lens groups, each lens group including multiple microlenses; an optical lens located on a side of the microlens array away from the display panel; and a drive mechanism connected to the microlens array, the drive mechanism being configured to drive each lens group to move relative to a corresponding display area within a focal length range of the microlens.

[0007] In a second aspect, an embodiment of the present application provides a virtual reality device, including: a display device as in the first aspect.

[0008] The display device provided by the embodiment of the present application includes a display panel, a microlens array, an optical lens and a driving mechanism. The microlens array is arranged on the display panel, the optical lens is located on the side of the microlens array away from the display panel, and the driving mechanism is connected to the microlens array. Furthermore, the display panel includes multiple display areas, the microlens array includes multiple lens groups, each lens group includes multiple microlenses, and the driving mechanism is used to drive each lens group to move relative to the corresponding display area within the focal length range of the microlens. Through the above-mentioned display device, a microlens array including multiple lens groups is added between the display panel and the optical lens, and each lens group is driven by the driving mechanism to move relative to the corresponding display area on the display panel within the focal length range of the microlens. In this way, the partitioned control of the distance between the microlens array and the display panel is achieved, and the light exit depth position of the pixels of the display panel can be adjusted in partitions, thereby changing the focus of the virtual image of the imaging in partitions to improve the field curvature problem of the optical lens, reduce the difference in image quality between the edge field of view and the center field of view, and improve the display quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is one of the structural schematic diagrams of the display device provided in an embodiment of the present application;

[0010] Figure 2 The second structural diagram of the display device provided in the embodiment of the present application;

[0011] Figure 3 The third structural diagram of the display device provided in the embodiment of the present application;

[0012] Figure 4 A schematic diagram of the structure of a microlens array provided in an embodiment of the present application;

[0013] Figure 5 A size comparison diagram of the first pixel and the microlens provided in an embodiment of the present application;

[0014] Figure 6 This is a fourth structural diagram of a display device provided in an embodiment of the present application;

[0015] Figure 7 A schematic diagram of the distance between the first pixel and the microlens provided in an embodiment of the present application;

[0016] Figure 8 This is a structural block diagram of the virtual reality device provided in an embodiment of the present application.

[0017] Reference numerals:

[0018] 100 display device, 102 display panel, 104 microlens array, 106 microlens, 108 optical lens, 110 first pixel, 112 sub-pixel, 114 transparent substrate, 116 display area, 118 lens group, 120 driving mechanism. DETAILED DESCRIPTION

[0019] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0020] The features of the terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, or electrical connections; direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0022] The following combination Figures 1-8 The display device and virtual reality device according to the embodiments of the present application are described in detail.

[0023] like Figure 1 As shown, an embodiment of the present application provides a display device 100 , wherein the display device 100 includes a display panel 102 , a microlens array 104 , an optical lens 108 , and a driving mechanism 120 .

[0024] Among them, such as Figure 2 As shown, the display panel 102 includes a plurality of display areas 116 .

[0025] Furthermore, the micro lens array 104 (MLA) is an array composed of lenses with a clear aperture and a relief depth in the micrometer order.

[0026] Specifically, if Figure 1 and Figure 2As shown, the microlens array 104 includes a plurality of lens groups 118 , each lens group 118 including a plurality of microlenses 106 .

[0027] Further, if Figure 4 As shown, the plurality of microlenses 106 in the microlens array 104 are arranged in a pixel arrangement. In actual applications, the distance between two adjacent microlenses 106 in the same row or column is between 0 and 60 μm, which is not specifically limited here.

[0028] Furthermore, the micro lens array 104 is provided on the display panel 102. The micro lens array may cover the display panel or may partially cover the display panel.

[0029] In one approach, the plurality of display regions 116 may correspond one-to-one with the plurality of lens groups 118 , thereby achieving precise alignment of the display panel 102 and the microlens array 104 .

[0030] Furthermore, the optical lens 108 is located on a side of the microlens array 104 away from the display panel 102 .

[0031] Furthermore, the driving mechanism 120 is connected to the microlens array 104 .

[0032] Furthermore, the driving mechanism 120 is used to drive each lens group 118 to move relative to the corresponding display area 116 within the focal length range of the microlens 106. In this way, the distance between the microlens array 104 and the display panel 102 is controlled in a zoned manner.

[0033] It is understandable that field curvature is also called image field curvature. When a plane passes through a lens system, all object points will present a clear image point behind the lens, but the surface formed by these clear image points is a curved surface, so on a flat imaging plane, an image with gradually changing clarity will be obtained. The field curvature problem based on lens design will cause the displayed imaging plane to bend, which will cause the central field of view to be clear, but the edge field of view is not on the same imaging plane as the central field of view, resulting in the problem that the edge field of view and the central field of view cannot be clearly imaged at the same time. In other words, there is a difference in image quality between the edge field of view and the central field of view, which will reduce the display quality.

[0034] Therefore, in the display device 100 provided in the embodiment of the present application, a microlens array 104 is added between the display panel 102 and the optical lens 108. Furthermore, for each lens group 118 in the microlens array 104, the distance between each lens group 118 and its corresponding display area 116 is uniformly controlled by a drive mechanism 120 within the focal length range of the microlens 106. A slight movement of the lens group 118 causes a change in the light exit depth position of the corresponding display area 116 on the display panel 102, thereby changing the depth of the virtual image formed by the display device 100. This, on the one hand, helps improve the light utilization efficiency and illumination uniformity of the display panel 102; on the other hand, it can adjust the light exit depth position of the pixels of the display panel 102 in a zoned manner, thereby changing the virtual image focus of the image formed in the zoned manner, achieving control of the virtual image position of the virtual image forming surface in different field of view areas or pixel positions, thereby causing the virtual image forming surface to change in curvature. This can improve the field curvature problem of the optical lens 108, reduce the difference in image quality between the edge field of view and the center field of view, and improve the display quality.

[0035] In actual application, the manufacturing material of each micro lens 106 in the micro lens array 104 may specifically include silicon nitride (SiN x ), silicon oxide (SiO x ), silicon oxynitride (SiO x N y ) or polymethyl methacrylate (PMMA) to ensure the transparency of the microlens 106.

[0036] Furthermore, those skilled in the art may set the number and size of the display areas 116 according to actual conditions, and no specific limitation is imposed herein.

[0037] For example, the display panel 102 is divided into 256×256 display areas 116 . When the display panel 102 is a 1.3-inch 4K microdisplay, the size of a single display area 116 is 99.15 μm×99.15 μm.

[0038] According to an embodiment of the present application, the display device 100 includes a display panel 102, a microlens array 104, an optical lens 108, and a driving mechanism 120. The microlens array 104 is disposed on the display panel 102, the optical lens 108 is located on a side of the microlens array 104 away from the display panel 102, and the driving mechanism 120 is connected to the microlens array 104. Furthermore, the display panel 102 includes multiple display areas 116, the microlens array 104 includes multiple lens groups 118, each lens group 118 includes multiple microlenses 106, and the driving mechanism 120 is used to drive each lens group 118 to move relative to the corresponding display area 116 within the focal length range of the microlens 106. With the above-described display device 100, a microlens array 104 including multiple lens groups 118 is added between the display panel 102 and the optical lens 108, and each lens group 118 is driven by the driving mechanism 120 to move relative to the corresponding display area 116 on the display panel 102 within the focal length range of the microlens 106. In this way, the distance between the microlens array 104 and the display panel 102 is controlled by zones, and the light-emitting depth position of the pixels of the display panel 102 can be adjusted by zones, thereby changing the focus of the virtual image of the imaging by zones, so as to improve the field curvature problem of the optical lens, reduce the difference in image quality between the edge field of view and the center field of view, and improve the display quality.

[0039] According to some embodiments of the present application, optionally, as Figure 3 As shown, the display panel 102 includes a plurality of first pixels 110 .

[0040] In one approach, the plurality of microlenses 106 are disposed on the plurality of first pixels 110 in a one-to-one correspondence, thereby achieving precise alignment between the first pixels 110 and the microlenses 106 .

[0041] During operation of the display device 100 , each first pixel 110 is configured to respond to light emitted from the corresponding microlens 106 , so that the emitted light can reach a predetermined viewing position after passing through the corresponding microlens 106 .

[0042] According to the display device 100 of the embodiment of the present application, the display panel 102 includes a plurality of first pixels 110, and the plurality of microlenses 106 are disposed in a one-to-one correspondence with the plurality of first pixels 110. This achieves precise alignment between the first pixels 110 and the microlenses 106, facilitates precise correction of the field curvature problem of the optical lens 108, and improves the display quality of the virtual image.

[0043] According to some embodiments of the present application, optionally, as Figure 3 As shown, the driving mechanism 120 is further used to drive each microlens 106 to move relative to the corresponding first pixel 110 within a focal length range.

[0044] Specifically, in the display device 100 provided in the embodiment of the present application, the driving mechanism 120 is further configured to drive each microlens 106 to move relative to the corresponding first pixel 110 within its own focal length range, so as to control the vertical distance between the single first pixel 110 and the microlens 106 .

[0045] It is understood that the slight movement of the microlens 106 causes the light exit depth position of the corresponding first pixel 110 on the display panel 102 to change, thereby causing the virtual image depth at the corresponding position to change. In this way, the virtual image position of the imaging surface in different field of view areas or pixel positions can be precisely controlled on a pixel-by-pixel basis, thereby causing the virtual image imaging surface to produce curved surface changes.

[0046] That is, in the display device 100 provided in the embodiment of the present application, each microlens 106 is driven by the driving mechanism 120 to move relative to the corresponding first pixel 110 within its focal length range, so that the light output depth position of each first pixel 110 on the display panel 102 can be controlled in a single and precise manner, thereby accurately changing the focus of the virtual image of the imaging, improving the field curvature problem of the optical lens 108, reducing the difference in image quality effects between the edge field of view and the center field of view, and improving the display quality.

[0047] According to the display device 100 of the embodiment of the present application, the drive mechanism 120 is further configured to drive each microlens 106 to move relative to the corresponding first pixel 110 within a focal length range. This allows for single, precise control of the light-emitting depth position of each first pixel 110 on the display panel 102, thereby precisely changing the focus of the resulting virtual image, improving the field curvature of the optical lens 108, reducing the difference in image quality between the edge and center fields of view, and improving display quality.

[0048] According to some embodiments of the present application, optionally, as Figure 5 As shown, each first pixel 110 includes a plurality of sub-pixels 112 .

[0049] Specifically, the plurality of sub-pixels 112 may be RGB (Red-Green-Blue) pixels.

[0050] Furthermore, the size of each microlens 106 is related to the size of the display panel 102 and the first pixel 110 thereon. Specifically, the diameter of each microlens 106 satisfies: the microlens 106 covers the light-emitting area of the corresponding first pixel 110. In other words, the diameter of each microlens 106 satisfies: the microlens 106 covers the plurality of sub-pixels 112 in the corresponding first pixel 110.

[0051] In actual applications, the area of each microlens 106 specifically accounts for 80% to 100% of the area of the corresponding first pixel 110. Those skilled in the art may set the area ratio of the microlens 106 relative to the first pixel 110 according to actual conditions, and no specific limitation is imposed herein.

[0052] For example, the display panel 102 is a microdisplay, and the size of a single first pixel 110 in the display panel 102 is 6um to 25um. In this case, the diameter of a single microlens 106 can also be set to 6um to 25um so that the microlens 106 can cover the light-emitting area in the corresponding first pixel 110.

[0053] According to the display device 100 of the embodiment of the present application, each first pixel 110 includes multiple sub-pixels 112, and the diameter of each microlens 106 satisfies: the microlens 106 covers the multiple sub-pixels 112 in the corresponding first pixel 110. This ensures that the microlens 106 covers the light-emitting area in the corresponding first pixel 110, thereby ensuring the light utilization efficiency of the display panel 102.

[0054] According to some embodiments of the present application, optionally, as Figure 6 As shown, the display device 100 further includes a transparent substrate 114 .

[0055] The transparent substrate 114 is fixedly disposed between the display panel 102 and the microlens array 104 . The transparent substrate 114 is used to keep the microlens array 104 and the display panel 102 relatively fixed.

[0056] In actual applications, other methods can be used to maintain relative fixation between the microlens array 104 and the display panel 102. For example, a clamp can be used to fix the microlens array 104 and the display panel 102. Those skilled in the art can select a method for fixing the microlens array 104 and the display panel 102 according to actual circumstances, and no specific limitation is imposed herein.

[0057] According to the display device 100 of the embodiment of the present application, the display device 100 further includes a transparent substrate 114 located between the display panel 102 and the microlens array 104. This ensures that the microlens array 104 and the display panel 102 remain relatively fixed, thereby ensuring the stability of the operation of the display device 100.

[0058] According to some embodiments of the present application, optionally, as Figure 6 As shown, the transparent substrate 114 has different thicknesses in different regions.

[0059] Specifically, in the display device 100 provided in the embodiment of the present application, different thicknesses are designed for different regions of the transparent substrate 114 within the focal length range of the microlenses 106, so that the vertical distances between the display panel 102 and the microlens array 104 at different locations vary. Thus, by adjusting the thickness of the transparent substrate 114 by region, the vertical distances between the display panel 102 and the microlens array 104 at different locations can be controlled, thereby achieving a desired distance between the microlens array 104 and the display panel 102 at corresponding locations, thereby achieving control over the light emission depths of different pixels on the display panel 102.

[0060] According to the display device 100 of the embodiment of the present application, the thickness of the transparent substrate 114 varies in different regions, thereby varying the vertical distance between the display panel 102 and the microlens array 104 at different locations. Thus, by adjusting the thickness of the transparent substrate 114 by region, the vertical distance between the display panel 102 and the microlens array 104 at different locations can be controlled, thereby improving the field curvature of the optical lens 108, reducing the difference in image quality between the edge and center fields of view, and improving display quality.

[0061] According to some embodiments of the present application, optionally, the etching depths of the plurality of first pixels 110 are different.

[0062] Specifically, in the display device 100 provided in the embodiment of the present application, within the focal length range of the microlens 106, different first pixels 110 or different sub-pixels 112 are etched at different depths. In this way, the vertical distances between different first pixels 110 and corresponding microlenses 106 can be controlled, thereby achieving a desired distance between the microlens 106 and the first pixel 110, thereby achieving control over the light emission depth positions of different first pixels 110 in the display panel 102.

[0063] According to the display device 100 of the embodiment of the present application, the etching depths of the plurality of first pixels 110 are different, so that the vertical distances between different first pixels 110 and corresponding microlenses 106 are different. In this way, the vertical distances between different first pixels 110 and corresponding microlenses 106 can be controlled, thereby improving the field curvature problem of the optical lens 108, reducing the difference in image quality between the edge field of view and the center field of view, and improving the display quality.

[0064] According to some embodiments of the present application, optionally, the vertical distance between each first pixel 110 and the corresponding microlens 106 is related to the field curvature of the optical lens 108 .

[0065] Specifically, in the display device 100 provided in the embodiment of the present application, the vertical distance between each first pixel 110 and the corresponding microlens 106 is related to the field curvature of the optical lens 108. As a result, the light exit depth position of each first pixel 110 is related to the field curvature of the optical lens 108, so that the virtual image pixels are not arranged on the same depth plane, but can be arranged on a curved surface according to the target curvature. This can improve the field curvature problem of the optical lens 108, make the virtual image present an ideal curved surface design, and ensure the image quality effect of the equidistant virtual image.

[0066] Furthermore, it's understandable that the human eye isn't static; it naturally moves. Furthermore, in binocular stereopsis, the binocular fusion area on the focus plane is curved. Therefore, traditional flat magnified virtual image solutions don't conform to the natural binocular imaging state of the human eye, affecting the user's perception of display quality.

[0067] In the display device 100 provided in the embodiment of the present application, by setting the vertical distance between each first pixel 110 and the corresponding microlens 106 to be related to the field curvature of the optical lens 108, it can also meet the surface fusion of human eye rotation and binocular fusion, ensuring that the virtual image imaging position can still be projected to the same depth position on the retina when the user moves his eyes, thereby improving the user's perception of the display quality effect.

[0068] According to the display device 100 of the embodiment of the present application, the vertical distance between each first pixel 110 and the corresponding microlens 106 is related to the field curvature of the optical lens 108. This can improve the field curvature of the optical lens 108, ensure the image quality of the equidistant virtual image, and meet the requirements of human eye rotation and binocular fusion, thereby improving the user's perception of display image quality.

[0069] According to some embodiments of the present application, optionally, as Figure 7 As shown, the vertical distance between each first pixel 110 and the corresponding microlens 106 does not exceed the focal length range of the microlens 106 .

[0070] Specifically, in the display device 100 provided in the embodiment of the present application, the vertical distance between each first pixel 110 and the corresponding microlens 106 does not exceed the focal length range of the microlens 106. In this way, the depth position of the light emitted by the pixel in the display panel 102 can be changed, and the light emitted by the pixel on the display panel 102 can form a magnified virtual image on the side away from the microlens array 104.

[0071] According to the display device 100 of the embodiment of the present application, the vertical distance between each first pixel 110 and the corresponding microlens 106 does not exceed the focal length range of the microlens 106. In this way, the imaging requirements of the display device 100 are met and normal imaging of the display device 100 is ensured.

[0072] According to some embodiments of the present application, optionally, as Figure 8 As shown, the embodiment of the present application further provides a virtual reality device 200. The virtual reality device 200 includes the display device 100 in any of the above embodiments. The virtual reality device 200 provided in the embodiment of the present application includes the display device 100 in any of the above embodiments and can achieve the same technical effects. To avoid repetition, the details will not be described here.

[0073] It should be noted that the virtual reality device 200 in the embodiment of the present application includes a mobile virtual reality device and a non-mobile virtual reality device.

[0074] In actual application, the above-mentioned virtual reality device 200 includes but is not limited to a head-mounted VR (Virtual Reality) device, an integrated VR device, and an external VR device, etc., and is not specifically limited here.

[0075] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0076] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and purpose of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A display device, characterized in that: include: A display panel including a plurality of display areas; a microlens array, disposed on the display panel, the microlens array comprising a plurality of lens groups, each of which comprises a plurality of microlenses; an optical lens, located on a side of the microlens array away from the display panel; A driving mechanism is connected to the microlens array, and is used to drive each lens group to move relative to the corresponding display area within the focal length range of the microlens.

2. The display device according to claim 1, wherein The display panel includes a plurality of first pixels, and the plurality of micro lenses are arranged on the plurality of first pixels in a one-to-one correspondence.

3. The display device according to claim 2, wherein: The driving mechanism is further configured to drive each of the microlenses to move relative to the corresponding first pixel within a focal length range.

4. The display device according to claim 2, wherein: Each of the first pixels includes a plurality of sub-pixels, and a diameter of each of the microlenses satisfies: the microlens covers the plurality of sub-pixels in the corresponding first pixel.

5. The display device according to claim 2, wherein Also includes: A transparent substrate is located between the display panel and the microlens array.

6. The display device according to claim 5, wherein: The thickness of different regions of the transparent substrate is different, so that the vertical distances between the display panel and the microlens array at different positions are different.

7. The display device according to any one of claims 2 to 6, characterized in that The etching depths of the plurality of first pixels are different, so that vertical distances between different first pixels and the corresponding micro lenses are different.

8. The display device according to any one of claims 2 to 6, characterized in that The vertical distance between each first pixel and the corresponding microlens is related to the field curvature of the optical lens.

9. The display device according to any one of claims 2 to 6, characterized in that A vertical distance between each of the first pixels and the corresponding microlens does not exceed a focal length range of the microlens.

10. A virtual reality device, characterized in that: include: The display device according to any one of claims 1 to 9.

Images