Display and near-eye display device

Abstract

Embodiments of the present application relate to the technical field of display, and provide a display and a near-eye display device. The display comprises a display area and a frame area surrounding the display area. The display further comprises an actual mark in the frame area, and the material of the actual mark is a reflective material or a fluorescent material.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a display and a near-eye display device. Background Technology

[0002] Existing near-eye display devices (such as augmented reality glasses) often result in the displayed image not being centered in the user's field of vision due to improper wearing methods, leading to incomplete viewing and a poor user experience. Summary of the Invention

[0003] This application provides a display. The display includes a display area and a border area surrounding the display area, and the display also includes an actual mark located in the border area, the material of the actual mark being a reflective material or a fluorescent material.

[0004] The display in this embodiment has actual markers made of reflective or fluorescent materials around the display area. When this display is used in a near-eye display device, if the display image is not fully displayed within the user's field of vision, a virtual marker corresponding to the actual marker is formed within the user's field of vision; if the display image is fully displayed within the user's field of vision, the virtual marker is not present. Thus, when a user wears the near-eye display device, if worn correctly, the virtual marker will not appear in the user's field of vision, meaning the actual marker will not affect the display effect; if worn incorrectly, the displayed image may not be centered, and the virtual image may not be fully displayed. In this case, a virtual marker will appear within the user's field of vision. This virtual marker serves as a reference for the user to adjust the wearing position, allowing the user to adjust the near-eye display device according to the actual situation to center the virtual image in their field of vision, resulting in a better viewing experience.

[0005] A second aspect of this application provides a near-eye display device. The near-eye display device includes:

[0006] Image source for providing image light, said image source including the display according to the first aspect; and

[0007] Optical waveguide, used to transmit the image light;

[0008] The actual marker is configured such that: when the display screen is not fully displayed within the user's field of vision, a virtual marker corresponding to the actual marker is formed within the user's field of vision; when the display screen is fully displayed within the user's field of vision, the virtual marker does not exist within the user's field of vision.

[0009] A third aspect of this application provides a near-eye display device. The near-eye display device includes:

[0010] Image source for providing image light, said image source including the display according to the first aspect; and

[0011] Optical waveguide, used to transmit the image light;

[0012] Wherein, if the material of the actual mark is a reflective material, the reflective material is used to reflect illumination light to the optical waveguide to form a virtual mark; if the material of the actual mark is a fluorescent material, the fluorescent material is used to emit fluorescence to the optical waveguide to form a virtual mark.

[0013] The near-eye display devices of the second and third aspects of this application both include the aforementioned display, which has at least the same advantages as the aforementioned display, and will not be repeated here. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a display according to an embodiment of this application.

[0015] Figure 2 This is a side view of a near-eye display device according to an embodiment of this application.

[0016] Figure 3 for Figure 2 A schematic diagram of the optical path when the image on the display is fully displayed within the user's field of vision in a near-eye display device.

[0017] Figure 4 This is a diagram illustrating how the screen's image is offset from the user's field of vision.

[0018] Figure 5 This is a diagram illustrating how the monitor's image is fully displayed within the user's field of vision.

[0019] Explanation of key component symbols:

[0020] Near-eye display device 100

[0021] Image source 10

[0022] Monitor 11

[0023] Display area 111

[0024] Border area 112

[0025] Zone 1, 1121

[0026] Second District 1122

[0027] District 3, 1123

[0028] District 4, 1124

[0029] Lighting source 12

[0030] Polarization beam splitter 20

[0031] Imaging lens 30

[0032] Optical waveguide 40

[0033] Actual marker M1

[0034] Virtual marker M2

[0035] First direction D1

[0036] Second direction D2

[0037] Illumination L1

[0038] Image light L2

[0039] Screen P

[0040] Horizontal field of view (HFOV)

[0041] Vertical field of view (VFOV)

[0042] Field of view 200 Detailed Implementation

[0043] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0044] Figure 1 This is a schematic diagram of the structure of a display according to an embodiment of this application. Figure 1 As shown, the display 11 includes a display area 111 and a bezel area 112 surrounding the display area 111. The display 11 also includes an actual marker M1 located in the bezel area 112. The bezel area 112 includes a first area 1121 and a second area 1122 located on opposite sides of the display area 111 along a first direction D1, and a third area 1123 and a fourth area 1124 located on opposite sides of the display area 111 along a second direction D2. The second direction D2 is perpendicular to the first direction D1. The display area 111 is rectangular, and the actual marker M1 is a rectangular frame surrounding the display area 111. That is, portions of the actual marker M1 are provided on opposite sides of the display area 111 along the first direction D1 and on opposite sides of the display area 111 along the second direction D2. The material of the actual marker M1 is a reflective material or a fluorescent material. The reflective material is, for example, reflective paint, but is not limited to this; for example, it can also be other light-reflective materials (such as reflective metal).

[0045] Specifically, the display 11 includes a front shell (not shown), and the actual mark M1 is prepared by forming a reflective material or a fluorescent material on the surface of the front shell. Alternatively, the front shell of the display 11 has an embedding groove (not shown), and the actual mark M1 is prepared by filling the embedding groove with a reflective material or a fluorescent material.

[0046] Figure 2 This is a side view of a near-eye display device according to an embodiment of this application. The near-eye display device 100 is, for example, augmented reality (AR) glasses or an AR helmet. Figure 2 As shown, the near-eye display device 100 includes an image source 10, a polarizing beam splitter 20, an imaging lens 30, and an optical waveguide 40. The image source 10 provides image light L2. The image light L2 emitted from the image source 10 is transmitted within the optical waveguide 40 after passing through the polarizing beam splitter 20 and the imaging lens 30 in sequence.

[0047] Specifically, the image source 10 includes an illumination source 12 and a display 11. The illumination source 12 emits illumination light L1. The illumination source 12 may include, for example, a light-emitting diode (LED) source, a laser source, or other elements that can act as a light source. The display 11 is a reflective liquid crystal display (LCD) or a liquid crystal on silicon (LCoS). A polarizing beam splitter 20 is located on the light-emitting side of the illumination source 12. The polarizing beam splitter 20 may be, for example, a polarization beam splitter (PBS). An imaging lens 30 is located on the light-emitting side of the polarizing beam splitter 20. The imaging lens 30 may have a spherical or aspherical surface and may be made of resin or glass. The optical waveguide 40 may be a geometrically arrayed optical waveguide or a diffractive optical waveguide. The illumination light L1 is reflected to the display 11 after passing through the polarizing beam splitter 20. The display 11 receives and modulates the illumination light L1 to generate image light L2. The image light L2 emitted from the display 11 is transmitted to the imaging lens 30 after passing through the polarization beam splitter 20. After passing through the imaging lens 30, the image light L2 is transmitted within the optical waveguide 40.

[0048] It should be noted that, Figure 2 The image source 10, polarizing beam splitter 20, imaging lens 30, and optical waveguide 40 shown are modules configured for one human eye (e.g., the right eye), while the near-eye display device 100 for the other human eye (e.g., the left eye) also includes the image source 10, polarizing beam splitter 20, imaging lens 30, and optical waveguide 40. The modules configured for each of the human eyes are identical and will not be described further here.

[0049] Please refer to the following: Figures 1 to 3The material of the actual marker M1 can be either reflective or fluorescent. When the material of the actual marker M1 is reflective, the illumination light L1, while illuminating the display area 111 of the display 11, also illuminates the actual marker M1 located in the border area 112. The reflective material reflects the illumination light L1 illuminating it. The illumination light L1 reflected by the reflective material passes sequentially through the polarizing beam splitter 20 and the imaging lens 30 to the optical waveguide 40, forming a virtual marker M2. The near-eye display device 100 also includes a lens barrel (not shown), which encloses the image source 10, the polarizing beam splitter 20, and the imaging lens 30. Because the image source 10 is enclosed by the lens barrel, interference from external light on the reflective material is avoided. That is, the reflective material may form a virtual marker M2 only when illuminated by the illumination light L1 emitted from the illumination source 12; when no illumination light L1 illuminates the reflective material, the reflective material will not form a virtual marker M2. When the material used to mark M1 is a fluorescent material, the fluorescent material is self-luminous and can emit fluorescence without the need for illumination light L1. This fluorescence passes sequentially through the polarization beam splitter 20 and the imaging lens 30 to the optical waveguide 40, forming the virtual mark M2.

[0050] In this embodiment, the actual marker M1 is configured such that when the display screen 11 is not fully displayed within the user's field of view 200, a virtual marker M2 corresponding to the actual marker M1 is formed within the user's field of view 200. When the display screen 11 is fully displayed within the user's field of view 200, the virtual marker M2 does not exist within the user's field of view 200.

[0051] Specifically, the field of view 200, also referred to as the eye movement range in this text, is a cone-shaped area between the near-eye display device 100 and the user's eyeball, representing the area where the displayed content is clearest. A perfect image is obtained if the user's eyeball is aligned with the center of the field of view 200. However, when the user's eyeball moves laterally or vertically, the image deteriorates at some point in each direction until it becomes unacceptable. Exceeding this range may result in image distortion, color errors, or even no content being displayed. Connecting all these points together forms a shape called the "Eye Box." Furthermore, in this text, the horizontal field of view (HFOV) refers to the angular range of the image that the user can receive in the horizontal direction. The vertical field of view (VFOV) refers to the angular range of the image that the user can receive in the vertical direction.

[0052] exist Figure 3 The mid-field of view, 200, is represented by a cone-shaped area formed by line segments OA, OB, OC, and OD. Furthermore, in... Figure 3In the diagram, E, F, G, and H are the midpoints of line segments AB, BC, CD, and DA, respectively. The angle between line segments OH and OF is the horizontal field of view (HFOV), and the angle between line segments OE and OG is the vertical field of view (VFOV). Figure 3 As shown, the pattern of the virtual marker M2 is consistent with the pattern of the actual marker M1. In this embodiment of the application, the virtual marker M2 will not appear in the user's field of vision 200 when the user correctly wears the near-eye display device 100. That is to say, when the user correctly wears the near-eye display device 100, the user will not see the virtual marker M2, and the virtual marker M2 will not affect the normal display effect.

[0053] Figure 4 This is a diagram illustrating how the monitor's image is offset from the user's field of vision. (Example) Figure 4 As shown, if the user wears the device improperly, the displayed image P will not be centered within the field of vision 200, the virtual image P seen by the user will be incomplete, and part of the virtual marker M2 will appear within the user's field of vision 200. Figure 4 In the scenario shown, the user can see portions of the virtual marker M2 located to the left, right, and top of screen P. In this case, the user can keep their head still and, based on their experience, adjust the near-eye display device 100 to a suitable position in the left-right direction (e.g., to the right) and the up-down direction (e.g., downwards), thus achieving the desired effect. Figure 5 As shown, this ensures that the virtual marker M2 disappears within a 200° field of view, allowing the user to see the complete image P. The aforementioned left-right direction can also be referred to as the interpupillary distance direction.

[0054] Understandably, in other cases, if the displayed image P is not severely offset, the user may be able to see a portion of the virtual marker M2 located on one side of the image P. The user can also use this virtual marker M2 as a reference to adjust the near-eye display device 100 to a suitable position in the left-right direction (e.g., to the right) and / or the up-down direction (e.g., downwards), thereby achieving the desired effect. Figure 5 As shown, this makes the virtual marker M2 disappear within the field of view of 200 and the user see the complete picture P.

[0055] In other embodiments, the display area 111 is not limited to being rectangular, and the actual mark M1 is not limited to being a closed rectangular frame. For example, the display area 111 can be a regular shape (such as a circle) or an irregular shape. The actual mark M1 is formed by discontinuous reflective or fluorescent materials, that is, the actual mark M1 includes multiple segments of reflective or fluorescent materials. As long as the actual mark M1 is provided in the first area 1121, the second area 1122, the third area 1123, and the fourth area 1124, when the screen P of the display 11 is not fully displayed within the user's field of vision 200, a virtual mark M2 corresponding to the actual mark M1 is formed within the user's field of vision 200. When the screen P of the display 11 is fully displayed within the user's field of vision 200, there is no virtual mark M2 within the user's field of vision 200.

[0056] Furthermore, the actual marker M1 in the first zone 1121 and the second zone 1122 is a line segment parallel to the second direction D2. The actual marker M1 in the third zone 1123 and the fourth zone 1124 is a line segment parallel to the first direction D1. In this way, the virtual marker M2 is formed by a straight line segment, which facilitates the user's adjustment and alignment.

[0057] In the above embodiments, the display 11 is described as a reflective LCD or LCoS, where the display 11 needs to receive illumination light L1 before outputting image light L2. In other embodiments, the display 11 can be a transmissive LCD or a self-emissive display. A self-emissive display can be, for example, any one of an organic light-emitting diode (OLED) display, an inorganic light-emitting diode (LED) display, a digital micromirror device (DMM), and a laser beam scanner. An inorganic LED display can be, for example, a miniature inorganic LED display or a micro-inorganic LED display. That is, when the display 11 is a transmissive LCD or a self-emissive display, the display 11 does not need to receive illumination light L1; it can output image light L2 itself. The image source 10 may not include the illumination source 12. The near-eye display device 100 may not include a polarizing beam splitter. The imaging lens 30 is located on the light-emitting side of the image source 10. The image source 10 and the imaging lens 30 are enclosed by a lens barrel. The image light L2 is transmitted within the optical waveguide 40 after passing through the imaging lens 30. In this case, the material actually used to mark M1 is a fluorescent material, which is used to emit fluorescence to the optical waveguide 40 to form a virtual mark M2.

[0058] In summary, the display of this application embodiment has actual markers made of reflective or fluorescent materials around the display area. When this display is applied to a near-eye display device, when the display image is not fully displayed within the user's field of vision, a virtual marker corresponding to the actual marker is formed within the user's field of vision; when the display image is fully displayed within the user's field of vision, the virtual marker does not exist within the user's field of vision. Thus, when a user wears the near-eye display device, if worn correctly, the virtual marker will not appear within the user's field of vision, meaning the actual marker will not affect the display effect; if worn improperly, the displayed image may not be centered, and the virtual image may not be fully displayed. In this case, a virtual marker will appear within the user's field of vision. This virtual marker serves as a reference for the user to adjust the wearing position, allowing the user to adjust the near-eye display device according to the actual situation to center the virtual image within the field of vision, resulting in a better user experience.

[0059] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A display comprising a display area and a border area surrounding the display area, characterized in that, The display also includes an actual mark located in the bezel area. The material of the actual mark is a reflective material or a fluorescent material. The actual mark is configured such that when the display is used in a near-eye display device, when the image of the display is not fully displayed within the user's field of vision, a virtual mark corresponding to the actual mark is formed within the user's field of vision. When the display screen shows the entire image within the user's field of vision, the virtual marker is not present within the user's field of vision.

2. The display as claimed in claim 1, characterized in that, The border area includes a first area and a second area located on opposite sides of the display area along a first direction, and a third area and a fourth area located on opposite sides of the display area along a second direction, wherein the second direction is perpendicular to the first direction; the actual mark is provided in the first area, the second area, the third area and the fourth area.

3. The display as claimed in claim 2, characterized in that, The actual markings in the first and second zones are line segments parallel to the second direction; the actual markings in the third and fourth zones are line segments parallel to the first direction.

4. The display as claimed in claim 1, characterized in that, The display area is rectangular, and the actual marker is a rectangular frame surrounding the display area.

5. A near-eye display device, characterized in that, include: An image source for providing image light, said image source comprising a display as described in any one of claims 1 to 4; as well as Optical waveguide, used to transmit the image light; The actual marker is configured such that when the display screen is not fully displayed within the user's field of vision, a virtual marker corresponding to the actual marker is formed within the user's field of vision. When the display screen shows the entire image within the user's field of vision, the virtual marker is not present within the user's field of vision.

6. The near-eye display device as described in claim 5, characterized in that, When the material of the actual mark is a reflective material, the reflective material is used to reflect illumination light to the optical waveguide to form a virtual mark; when the material of the actual mark is a fluorescent material, the fluorescent material is used to emit fluorescence to the optical waveguide to form a virtual mark.

7. The near-eye display device as described in claim 5 or 6, characterized in that, The display is a reflective liquid crystal display or a silicon-based liquid crystal display; The image source also includes an illumination source for emitting illumination light; The display is used to receive and modulate the illumination light to generate the image light; When the material used for actual marking is a reflective material, the reflective material is used to reflect the illumination light.

8. The near-eye display device as described in claim 7, characterized in that, The near-eye display device further includes a polarizing beam splitter located on the light-emitting side of the illumination source and an imaging lens located on the light-emitting side of the polarizing beam splitter. The illumination light is reflected to the display after passing through the polarization beam splitter, and the image light emitted from the display is transmitted to the imaging lens after passing through the polarization beam splitter. The image light is then transmitted within the optical waveguide after passing through the imaging lens.

9. The near-eye display device as described in claim 5 or 6, characterized in that, The display is used to generate the image light, and the display is any one of a transmissive liquid crystal display, an organic light-emitting diode display, an inorganic light-emitting diode display, a digital micromirror device, and a laser beam scanner, and the material actually marked is a fluorescent material.

10. The near-eye display device as described in claim 9, characterized in that, The near-eye display device further includes an imaging lens located on the light-emitting side of the image source, and the image light is transmitted within the optical waveguide after passing through the imaging lens.

Images