Display system, display device

Abstract

The application relates to a display system and a display device, comprising: an image light source configured to emit image light; a first substrate arranged on the light emitting side of the image light source, the first substrate comprising a first surface and a second surface arranged oppositely, the first surface being located on the side of the second surface away from the image light source; and a light shielding layer arranged on at least part of the area of the first surface, the light shielding layer comprising a plurality of light shielding strips, one end of the light shielding strip being connected to the first surface, and the other end of the light shielding strip being away from the first surface; wherein the two sides of the light shielding strip at the included angle with the first surface are both gap portions; and at least part of the light shielding strips are arranged in a spaced and parallel manner along a first direction, the first direction being parallel to the first surface. The application can solve the display defects.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display system and display device. Background Technology

[0002] With the development of augmented reality technology, AR headsets, AR glasses, and automotive HUDs (head-up displays) are gradually being recognized as next-generation computing and display platforms, and more and more manufacturers are investing heavily in research and development. The key optical components of these display devices are the optical engine for generating images (including the image light source) and the light transmission module for transmitting images to the eyes. The light transmission module is the most critical part, directly affecting the size, image quality, and viewing comfort of these display devices. Currently, the mainstream light transmission module in the industry is represented by optical waveguide devices.

[0003] However, display devices in related technologies have display defects. Summary of the Invention

[0004] Therefore, it is necessary to provide a display system and display device to address the display defects existing in display devices in related technologies.

[0005] According to a first aspect of this application, a display system is provided, comprising:

[0006] Image light source, configured to emit image light;

[0007] A first substrate is disposed on the light-emitting side of the image light source. The first substrate includes a first surface and a second surface disposed opposite to each other, with the first surface located on the side of the second surface away from the image light source.

[0008] A light-shielding layer is disposed at least in a portion of the first surface. The light-shielding layer includes a plurality of light-shielding strips, one end of which is connected to the first surface and the other end of which is away from the first surface.

[0009] Wherein, the two sides of the light-shielding strip that form an angle with the first surface are both gap portions;

[0010] At least a portion of the light-shielding strips are arranged at intervals and in parallel along a first direction, which is parallel to the first surface.

[0011] In some embodiments, the height of the plurality of light-shielding strips spaced apart along the first direction in the thickness direction of the first substrate has a tendency to first gradually increase and then gradually decrease.

[0012] In some embodiments, at least a portion of the light-shielding strips are spaced apart and arranged in parallel along a second direction, which is parallel to the first surface and intersects the second direction.

[0013] In some embodiments, a plurality of light-shielding strips are arranged at intervals along the first direction as a plurality of first light-shielding strips, and a plurality of light-shielding strips are arranged at intervals along the second direction as a plurality of second light-shielding strips;

[0014] The first light-shielding strip intersects with the corresponding second light-shielding strip.

[0015] In some embodiments, the height of the plurality of first light-shielding strips in the thickness direction of the first substrate has a tendency to gradually increase and then gradually decrease along the first direction;

[0016] The height of the plurality of second light-shielding strips in the thickness direction of the first substrate has a tendency to gradually increase and then gradually decrease along the second direction.

[0017] In some embodiments, the ratio of the minimum to the maximum height of the plurality of light-shielding strips in the thickness direction of the first substrate is 0.3-1; and / or,

[0018] The height of the light-shielding strip in the thickness direction of the first substrate is less than 5 mm; and / or,

[0019] In the direction perpendicular to the extension of the light-shielding strip, the thickness of the light-shielding strip is less than 200µm; and / or,

[0020] In the arrangement direction of the light-shielding strips, the ratio of the distance between two adjacent light-shielding strips to the total length of the area on the first surface where multiple light-shielding strips are disposed is 10%-100%.

[0021] In some embodiments, the angle between the light-shielding strip and the first surface is 5 degrees to 90 degrees; and / or,

[0022] The target angle at which the image light exits the first surface is 5 degrees to 90 degrees; and / or,

[0023] The absolute value of the difference between the target angle of the image light emitted from the first surface and the angle between the light-shielding strip and the first surface is less than 10 degrees.

[0024] In some implementations, the display system further includes:

[0025] An anti-reflective layer is disposed on the side of the light-shielding layer away from the first surface.

[0026] In some embodiments, the display system further includes an optical waveguide, the optical waveguide including a waveguide substrate, the first substrate being the waveguide substrate, and the light-shielding layer being disposed at least in the optical coupling region of the waveguide substrate; or,

[0027] The display system further includes a display module configured to emit the image light. The display module includes the image light source and further includes at least one of a protective layer, an encapsulation structure layer, and an optical functional layer. The first substrate is any one of the protective layer, the encapsulation structure layer, and the optical functional layer.

[0028] According to a second aspect of this application, based on the same concept, a display device is provided, including the display system described in any one of the foregoing claims.

[0029] In this embodiment, a light-shielding layer is disposed at least in a portion of the first surface. The light-shielding layer includes multiple light-shielding strips, one end of which is connected to the first surface, and the other end of which is away from the first surface. The two sides of the light-shielding strip that form an angle with the first surface are both gaps. At least a portion of the light-shielding strips are arranged at intervals and parallel to each other along a first direction, which is parallel to the first surface. Firstly, the two sides of the light-shielding strip that form an angle with the first surface are both gaps; that is, no support structure is needed on the first substrate or the first surface, and no prism layer / prism is needed to support the light-shielding strips. This avoids defects such as ghosting and blurring caused by substandard prism dimensional accuracy or large prism processing tolerances. It also avoids reduced emitted light and stray light generation caused by the prism angle (R angle), thereby improving light efficiency and FOV control capabilities. Secondly, when stray light generated by other levels of diffraction occurs, the light-shielding strip can block stray light in the first direction and / or other directions, effectively shielding and reducing visual impact, and reducing the image light of the shielded FOV; the light-shielding strip can block the backflow of sunlight, thereby solving or improving the problems of glare and sunlight backflow; the image light can be emitted from the space between two adjacent light-shielding strips, that is, the tilt angle of the light-shielding strip and the distance between two adjacent light-shielding strips can limit the emission angle of the image light on the first surface (the target angle of the image light relative to the first surface). Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of this application, the drawings used in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of a first display system provided in an embodiment of this application.

[0032] Figure 2 This is a first schematic diagram of a second display system provided in an embodiment of this application.

[0033] Figure 3 This is a second schematic diagram of a second display system provided in an embodiment of this application.

[0034] Figure 4 This is a schematic diagram of image light transmission in a second display system provided in an embodiment of this application.

[0035] Figure 5 This is a first schematic diagram of a light-shielding layer in a display system provided in an embodiment of this application.

[0036] Figure 6 This is a second schematic diagram of a light-shielding layer in a display system provided in an embodiment of this application.

[0037] Figure 7 This is a third schematic diagram of a light-shielding layer in a display system provided in an embodiment of this application.

[0038] Figure 8 This is a fourth schematic diagram of a light-shielding layer in a display system provided in an embodiment of this application.

[0039] Figure 9 This is a third schematic diagram of a second display system provided in an embodiment of this application.

[0040] Reference numerals: Display system 100; Image light source 20; First substrate 10; Light-shielding layer 30; First surface 101a; Second surface 101b; Light-shielding strip 31; First light-shielding strip 311; Second light-shielding strip 312; Protective film layer 40; Anti-reflective layer 50; Substrate 21; Pixel 22; Gap portion 31J; Image light g1; First included angle α; Target angle β; First direction X; Second direction Y; Encapsulation structure layer 10F; Optical waveguide 10D; Optical coupler entry area 10D1; Optical coupler exit area 10D2; First height h1; First thickness c1; First length d1; Second length D; First ray g10. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0047] The display devices in related technologies suffer from display defects. For example, automotive HUDs (Head-Up Displays) are located in front of the dashboard and are subject to sunlight and reflected light. Sunlight can affect the lifespan and temperature resistance of components, and the resulting glare poses safety concerns, namely, sunlight backflow and glare problems. Traditional HUDs use curved covers to reduce surface glare, but this results in a large footprint. While newer light-shielding prisms provide a light-shielding layer to block sunlight, they require high prism dimensional accuracy. Generally, the manufacturing process for prisms with a tolerance of <6 arcminutes has a high threshold; the larger the angle tolerance, the more likely it is to produce defects such as ghosting and blurring. Due to manufacturing limitations, prisms inevitably have rounded corners (R-angle), which also reduce emitted light and generate stray light. The optical waveguide itself has limited light efficiency, and the light-shielding layer generally reduces light efficiency. In other words, the display systems and devices in related technologies suffer from display defects such as sunlight backflow, glare, and ghosting.

[0048] In view of the above problems, this application provides an optical waveguide and a display device.

[0049] Please see Figures 1 to 9 . Figure 1 This is a schematic diagram of a first display system provided in an embodiment of this application. Figure 2 This is a first schematic diagram of a second display system provided in an embodiment of this application. Figure 3 This is a second schematic diagram of a second display system provided in an embodiment of this application. Figure 4 This is a schematic diagram of image light transmission in a second display system provided in an embodiment of this application. Figure 5 This is a first schematic diagram of a light-shielding layer in a display system provided in an embodiment of this application. Figure 6 This is a second schematic diagram of a light-shielding layer in a display system provided in an embodiment of this application. Figure 7 This is a third schematic diagram of a light-shielding layer in a display system provided in an embodiment of this application. Figure 8 This is a fourth schematic diagram of a light-shielding layer in a display system provided in an embodiment of this application. Figure 9 This is a third schematic diagram of a second display system provided in an embodiment of this application.

[0050] It should be noted that, Figures 3 to 9The characteristics of the light-shielding layer are illustrated using the second type of display system as an example. Figure 1 The first type of display system can also be set. Figures 3 to 9 Characteristics of the intermediate light-shielding layer. Figures 5 to 7 The diagram illustrates a top view of the light-shielding layer or a projection of the light-shielding layer onto the first surface. Figure 8 A three-dimensional schematic diagram of the light-shielding layer is shown.

[0051] It should be noted that, Figure 3 , Figure 5 and Figure 7 The different filling densities represent the different heights of the light-shielding strip 31 in the thickness direction of the first substrate. The higher the filling density, the greater the height of the light-shielding strip 31 in the thickness direction of the first substrate.

[0052] Firstly, such as Figures 1 to 8 As shown, this application provides a display system 100, which includes an image light source 20, a first substrate 10, and a light-shielding layer 30. The image light source 20 is configured to emit image light g1; the first substrate 10 is disposed on the light-emitting side of the image light source 20, and the first substrate 10 includes a first surface 101a and a second surface 101b disposed opposite to each other, with the first surface 101a located on the side of the second surface 101b away from the image light source 20; the light-shielding layer 30 is disposed at least in a portion of the first surface 101a, and the light-shielding layer 30 includes a plurality of light-shielding strips 31, one end of which is connected to the first surface 101a, and the other end of which is away from the first surface 101a; wherein, the two sides of the light-shielding strips 31 forming an angle with the first surface 101a (the smallest angle between the two sides is the first angle α) are both gap portions 31J; at least a portion of the light-shielding strips 31 are arranged at intervals and parallel along a first direction X, and the first direction X is parallel to the first surface 101a.

[0053] For example, image light source 20 is a component / structure that emits image light g1. Image light source 20 can be a display module / optical engine, or image light source 20 can be a part of the structure / component in the display module / optical engine. Image light source 20 / display module is the image source (optical engine). Image light source 20 / display module / optical engine can be a microdisplay, which is used to provide display content for the device. Image light source 20 / display module / optical engine can be a self-emissive active device, such as a light-emitting diode micro-OLED (µOLED) and micro-LED (µLED), or it can be a liquid crystal display (including transmissive Liquid crystal display (LCD) and reflective Liquid crystal on silicon (LCOS), as well as a digital micromirror array (DMD, the core of Digital Light Processing (DLP)) and a laser beam scanner (LBS) based on microelectromechanical systems (MEMS) technology. The type of image light source 20 / display module / optical engine is not limited to these.

[0054] For example, Figure 1 and Figure 2 As illustrated, the image light source 20 includes a driving substrate 21 and a plurality of pixels 22 disposed on the driving substrate 21.

[0055] For example, such as Figure 1 As shown, in the first display system, the first substrate 10 includes a first surface 101a and a second surface 101b disposed opposite to each other, with the first surface 101a located on the side of the second surface 101b away from the image light source 20; a light-shielding layer 30 is disposed at least in a portion of the first surface 101a. The display system 100 also includes a display module configured to emit image light g1. The display module includes the image light source 20 and further includes at least one of a protective layer, an encapsulation structure layer 10F, and an optical functional layer. The first substrate 10 is any one of the protective layer, the encapsulation structure layer 10F, and the optical functional layer. That is, the first substrate 10 is a layer structure in the display module, and the light-shielding layer 30 is directly disposed on the surface of the layer structure of the display module. In this case, the light-shielding layer 30 can be a part of the structure of the display module, but is not limited thereto.

[0056] For example, such as Figure 2 and Figure 3As shown, in the second display system, the first substrate 10 includes a first surface 101a and a second surface 101b disposed opposite to each other, with the first surface 101a located on the side of the second surface 101b away from the image light source 20; a light-shielding layer 30 is disposed at least in a portion of the first surface 101a. The display system 100 also includes an optical waveguide 10D, which includes a waveguide substrate. The first substrate 10 is the waveguide substrate, and the light-shielding layer 30 is disposed at least in the optical coupling output region 10D2 of the waveguide substrate. That is, the first substrate 10 is the waveguide substrate of the optical waveguide 10D, and the light-shielding layer 30 is disposed at least in a portion of the first surface 101a, for example, at least in the optical coupling output region 10D2 of the optical waveguide 10D. The optical waveguide 10D / waveguide substrate includes an optical coupler entry region 10D1 and an optical coupler exit region 10D2. The optical waveguide 10D is disposed on one side of the image light source 20. The image light g1 emitted by the image light source 20 enters the optical waveguide 10D from the optical coupler entry region 10D1 and exits from the optical coupler exit region 10D2.

[0057] For example, such as Figure 4 As shown, the light-shielding layer 30 includes a plurality of light-shielding strips 31. One end of the light-shielding strip 31 is connected to the first surface 101a, and the other end of the light-shielding strip 31 is away from the first surface 101a. That is, one end of the light-shielding strip 31 is connected to the first surface 101a, the light-shielding strip 31 extends in a direction away from the first surface 101a, and the angle between the light-shielding strip 31 and the first surface 101a is a first angle α.

[0058] For example, the two sides of the light-shielding strip 31 that form an angle with the first surface 101a are both gap portions 31J; that is, no support structure is required on the first base 10 or the first surface 101a, and no prism layer / prism is required to support the light-shielding strip 31. This avoids defects such as ghosting and blurring caused by substandard prism size accuracy or large prism processing tolerance, and also avoids the reduction of emitted light and the generation of stray light caused by the prism angle (R angle), thereby improving the light efficiency.

[0059] For example, both sides of the angle formed between the light-shielding strip 31 and the first surface 101a (the smallest of the two sides is the first angle α) are gap portions 31J. The gap portions 31J can be air gaps, etc., that is, there is no supporting structure such as a prism to support the light-shielding strip 31. For example, the side of the light-shielding strip 31 forming an acute angle with the first surface 101a is an air gap formed between the light-shielding strip 31 and the first surface 101a, which is not limited here.

[0060] For example, at least a portion of the light-shielding strips 31 are arranged at intervals and parallel along a first direction X, which is parallel to the first surface 101a. That is, on the first surface 101a, at least a portion of the light-shielding strips 31 are arranged at intervals and parallel along the first direction X. When stray light generated by other levels of diffraction occurs, the light-shielding strips 31 can block stray light in the first direction X and / or other directions, effectively shielding and reducing visual impact, and reducing the image light of the shielded FOV; the light-shielding strips 31 can also block backflow of sunlight, thereby solving or improving the problems of glare and backflow of sunlight; such as Figure 4 As shown, the image light g1 can be emitted from the space between two adjacent light-shielding strips 31. That is, the tilt angle of the light-shielding strips and the distance between two adjacent light-shielding strips can limit the emission angle of the image light g1 on the first surface 101a (the target angle of the image light g1 relative to the first surface 101a).

[0061] For example, in some embodiments, one end of the light-shielding strip 31 is connected to the first surface 101a and extends obliquely or vertically relative to the first surface 101a; the light-shielding strip 31 forms an acute angle or a right angle (first angle α) with the first surface 101a.

[0062] For example, in some implementations, such as Figures 5 to 7 As shown, the light-shielding strip 31 extends in the shape of a long strip or a curved shape in the direction parallel to the first surface 101a.

[0063] For example, one end of the light-shielding strip 31 is connected to the first surface 101a and extends obliquely or vertically relative to the first surface 101a. The features of the light-shielding strip 31 in the width direction are described here.

[0064] For example, in the length direction of the light-shielding strip 31, the light-shielding strip 31 extends in a direction parallel to the first surface 101a; in the width direction of the light-shielding strip 31, one end of the light-shielding strip 31 is connected to the first surface 101a, and the other end of the light-shielding strip 31 is away from the first surface 101a.

[0065] In this embodiment, the light-shielding layer 30 is disposed at least in a portion of the first surface 101a. The light-shielding layer 30 includes a plurality of light-shielding strips 31, one end of which is connected to the first surface 101a, and the other end of which is away from the first surface 101a. The two sides of the light-shielding strip 31 forming an angle with the first surface 101a are both gap portions 31J. At least a portion of the light-shielding strips 31 are arranged at intervals and parallel along a first direction X, which is parallel to the first surface 101a. Firstly, since the two sides of the light-shielding strip 31 forming an angle with the first surface 101a are both gap portions 31J, no support structure is required on the first substrate 10 or the first surface 101a, and no prism layer / prism is needed to support the light-shielding strips 31. This avoids defects such as ghosting and blurring caused by substandard prism dimensional accuracy or large prism processing tolerances. It also avoids reduced emitted light and stray light generation caused by the prism angle (R angle), thereby improving light efficiency and FOV control capabilities. Secondly, when stray light generated by other levels of diffraction occurs, the light-shielding strip 31 can block stray light in the first direction X and / or other directions, effectively shielding and reducing visual impact, and reducing the image light of the shielded FOV; the light-shielding strip 31 can also block the backflow of sunlight, thereby solving or improving the problems of glare and sunlight backflow; such as Figure 4 As shown, the image light g1 can be emitted from the space between two adjacent light-shielding strips 31. That is, the tilt angle of the light-shielding strips and the distance between two adjacent light-shielding strips can limit the emission angle of the image light g1 on the first surface 101a (the target angle of the image light g1 relative to the first surface 101a).

[0066] In some implementations, such as Figure 3 As shown, the height of the multiple light-shielding strips 31 arranged at intervals along the first direction X in the thickness direction of the first substrate 10 has a trend of first gradually increasing and then gradually decreasing.

[0067] For example, such as Figure 4 As shown, the height of the light-shielding strip 31 in the thickness direction of the first substrate 10 is a first height h1. Figure 3 and Figure 5 As shown, Figure 3 and Figure 5 A higher fill density indicates a greater height of the light-shielding strip 31 in the thickness direction of the first substrate 10. Among the multiple light-shielding strips 31 spaced apart along the first direction X, the first height h1 tends to gradually increase and then gradually decrease. At the light-shielding strips 31 with smaller edge heights, image light g1 at a larger angle can be emitted, thereby reducing the image light g1 of the FOV blocked by the light-shielding strip 31 (e.g., reducing the impact on the image light g1 of the FOV blocked by the light-shielding strip 31). Figure 4 (The first ray g10 is blocked).

[0068] In some implementations, such as Figures 6 to 8As shown, at least a portion of the light-shielding strips 31 are arranged at intervals and parallel along the second direction Y, which is parallel to the first surface 101a, and the first direction X intersects the second direction Y.

[0069] For example, the second direction Y and the first direction X can be perpendicular to each other, but are not limited to this.

[0070] For example, at least a portion of the light-shielding strips 31 are arranged at intervals and parallel along the first direction X, and at least a portion of the light-shielding strips 31 are arranged at intervals and parallel along the second direction Y. That is, multiple light-shielding strips 31 are arranged at intervals and parallel in at least two directions, which can reduce / block stray light in the first direction X and the second direction Y, effectively shielding and reducing visual effects in multiple directions and reducing the image light of the shielded FOV. At the same time, the FOV angle in the first direction X and the second direction Y can be controlled.

[0071] For example, at least a portion of the light-shielding strips 31 are arranged at intervals and parallel along the first direction X, and at least a portion of the light-shielding strips 31 are arranged at intervals and parallel along the second direction Y. In this case, in the top view or in the orthographic projection on the first surface 101a, the shape of the light-shielding layer 30 can be a rectangular, square, honeycomb, or other structures.

[0072] It should be noted that, as Figure 5 As shown, the light-shielding strips 31 exhibit a gradient distribution along a single axis and in a single direction (the height gradually changes). For example... Figure 7 As shown, the light-shielding strip 31 has a gradient distribution in two axes and two directions (the height gradually changes).

[0073] In some implementations, such as Figure 6 and Figure 8 As shown, multiple light-shielding strips 31 are arranged at intervals along the first direction X, forming multiple first light-shielding strips 311, and multiple light-shielding strips 31 are arranged at intervals along the second direction Y, forming multiple second light-shielding strips 312; the first light-shielding strips 311 intersect with the corresponding second light-shielding strips 312.

[0074] For example, such as Figure 6 and Figure 8 As shown, multiple light-shielding strips 31 are arranged at intervals along the first direction X, constituting multiple first light-shielding strips 311, and multiple light-shielding strips 31 are arranged at intervals along the second direction Y, constituting multiple second light-shielding strips 312; the first light-shielding strips 311 and the second light-shielding strips 312 intersect, and the morphology of the light-shielding layer 30 can be a honeycomb structure or the like.

[0075] In some implementations, such as Figure 7As shown, the height of the plurality of first light-shielding strips 311 in the thickness direction of the first substrate 10 has a tendency to gradually increase and then gradually decrease along the first direction X; the height of the plurality of second light-shielding strips 312 in the thickness direction of the first substrate 10 has a tendency to gradually increase and then gradually decrease along the second direction Y.

[0076] For example, the height of the light-shielding strip 31 in the thickness direction of the first substrate 10 is a first height h1. Combined with... Figure 3 and Figure 7 As shown, among the multiple first light-shielding strips 311 spaced apart along the first direction X, the first height h1 has a tendency to gradually increase and then gradually decrease; among the multiple second light-shielding strips 312 spaced apart along the second direction Y, the first height h1 also has a tendency to gradually increase and then gradually decrease. This reduces the image light g1 of the field of view (FOV) blocked by the light-shielding strips 31 in both the first and second directions X and Y.

[0077] In some implementations, such as Figure 4 As shown, the ratio of the minimum to the maximum height of the plurality of light-shielding strips 31 in the thickness direction of the first substrate 10 is 0.3-1; and / or, the height of the light-shielding strips 31 in the thickness direction of the first substrate 10 is less than 5 mm; and / or, in the extension direction perpendicular to the light-shielding strips 31, the thickness of the light-shielding strips 31 is less than 200 µm; and / or, in the arrangement direction of the light-shielding strips 31, the ratio of the distance between two adjacent light-shielding strips 31 to the total length of the area on the first surface 101a where the plurality of light-shielding strips 31 are disposed is 10%-100%.

[0078] For example, the height of the light-shielding strip 31 in the thickness direction of the first substrate 10 is a first height h1. The ratio of the minimum to the maximum height of the plurality of light-shielding strips 31 in the thickness direction of the first substrate 10 is 0.3-1, that is, the ratio of the minimum to the maximum height of the first height h1 is 0.3-1. The ratio of the minimum to the maximum height of the first height h1 can be any value among 0.3, 0.5, 0.7, 0.9, and 1. When the ratio of the minimum to the maximum height of the first height h1 is 1, that is, the first height g1 of each light-shielding strip 31 is equal.

[0079] For example, the height of the light-shielding strip 31 in the thickness direction of the first substrate 10 is less than 5 mm, that is, the first height h1 is less than 5 mm. The first height h1 can be any value among 5 mm, 4 mm, 3 mm, and 2 mm. The light-shielding strip 31 is relatively small in height in the thickness direction of the first substrate 10, making it difficult for the human eye to observe the light-shielding layer 30, thus avoiding the visual impairment of image occlusion.

[0080] For example, such as Figure 4As shown, the thickness of the light-shielding strip 31 is a first thickness c1 in the extension direction perpendicular to it. The thickness of the light-shielding strip 31 is less than 200µm in the extension direction perpendicular to it; the first thickness c1 can be any value among 150µm, 100µm, 50µm, and 30µm. A smaller first thickness c1 makes the light-shielding layer 30 less easily visible to the human eye, thus avoiding visual impairment of image occlusion.

[0081] For example, in the arrangement direction of the light-shielding strips 31, the ratio of the distance between two adjacent light-shielding strips 31 to the total length of the area on the first surface 101a where multiple light-shielding strips 31 are arranged is shown as 7. Taking the first direction X as an example, the distance between two adjacent light-shielding strips 31 is the first length d1, and the total length of the area on the first surface 101a where multiple light-shielding strips 31 are arranged is the second length D. The ratio of the first length d1 to the second length D is 10%-100%, and the ratio of the first length d1 to the second length D can be any value among 10%, 20%, 40%, 50%, 70%, and 100%. At this time, in the top view or the orthographic projection on the first surface 101a, the shape of the light-shielding layer 30 can be a rectangular, square, honeycomb, or other structures.

[0082] In some implementations, such as Figure 4 As shown, the angle between the light-shielding strip 31 and the first surface 101a is 5 degrees to 90 degrees (when the angle is 90 degrees, the light-shielding strip 31 is perpendicular to the first surface 101a); and / or, the target angle β of the image light g1 emitted from the first surface 101a is 5 degrees to 90 degrees; and / or, the absolute value of the difference between the target angle β of the image light g1 emitted from the first surface 101a and the angle (first angle α) between the light-shielding strip 31 and the first surface 101a is less than 10 degrees.

[0083] For example, the minimum angle between the light-shielding strip 31 and the first surface 101a is the first angle α, which is between 5 degrees and 90 degrees. The first angle α can be any value among 5 degrees, 30 degrees, 50 degrees, 70 degrees, and 90 degrees.

[0084] For example, the minimum angle between the image light g1 and the first surface 101a is the target angle β. The target angle β emitted by the image light g1 from the first surface 101a is between 5 degrees and 90 degrees. The target angle emitted by the image light g1 from the first surface 101a can be any value among 5 degrees, 30 degrees, 50 degrees, 70 degrees, and 90 degrees.

[0085] For example, such as Figure 4As shown, the absolute value of the difference between the target angle β emitted by the image light g1 from the first surface 101a and the angle between the light-shielding strip 31 and the first surface 101a is less than 10 degrees. The absolute value of the difference between the target angle β and the first angle α can be any value among 10 degrees, 5 degrees, 3 degrees, and 0 degrees. This reduces the blocking and absorption by the light-shielding strip 31, thereby improving the light extraction efficiency and light utilization rate of the image light g1.

[0086] In some implementations, such as Figure 9 As shown, the display system 100 also includes an anti-reflective layer 50. The anti-reflective layer 50 is disposed on the side of the light-shielding layer 30 away from the first surface 101a.

[0087] For example, the display system 100 may further include a protective film layer 40 and an anti-reflective layer 50, the anti-reflective layer 50 being located on the side of the protective film layer 40 away from the first surface 101a, and the protective film layer 40 may be a cover plate layer. By providing the anti-reflective layer 50, interference from ambient light and stray light can be further reduced, thereby further improving defects such as glare.

[0088] In some implementations, such as Figure 1 As shown, the display system 100 also includes an optical waveguide 10D, which includes a waveguide substrate. A first substrate 10 is the waveguide substrate, and a light-shielding layer 30 is disposed at least in the optical coupling output region 10D2 of the waveguide substrate; or, as... Figure 2 and Figure 3 As shown, the display system 100 also includes a display module configured to emit image light g1. The display module includes an image light source 20 and at least one of a protective layer, an encapsulation structure layer 10F, and an optical functional layer. The first substrate 10 is any one of the protective layer, the encapsulation structure layer 10F, and the optical functional layer.

[0089] For example, such as Figure 1 As shown, in the first display system, the first substrate 10 includes a first surface 101a and a second surface 101b disposed opposite to each other, with the first surface 101a located on the side of the second surface 101b away from the image light source 20; a light-shielding layer 30 is disposed at least in a portion of the first surface 101a. The display system 100 also includes a display module configured to emit image light g1. The display module includes the image light source 20 and further includes at least one of a protective layer, an encapsulation structure layer 10F, and an optical functional layer. The first substrate 10 is any one of the protective layer, the encapsulation structure layer 10F, and the optical functional layer. That is, the first substrate 10 is a layer structure in the display module, and the light-shielding layer 30 is directly disposed on the surface of the layer structure of the display module. In this case, the light-shielding layer 30 can be a part of the structure of the display module, but is not limited thereto.

[0090] For example, such as Figure 2 and Figure 3As shown, in the second display system, the first substrate 10 includes a first surface 101a and a second surface 101b disposed opposite to each other, with the first surface 101a located on the side of the second surface 101b away from the image light source 20; a light-shielding layer 30 is disposed at least in a portion of the first surface 101a. The display system 100 also includes an optical waveguide 10D, which includes a waveguide substrate. The first substrate 10 is the waveguide substrate, and the light-shielding layer 30 is disposed at least in the optical coupling output region 10D2 of the waveguide substrate. That is, the first substrate 10 is the waveguide substrate of the optical waveguide 10D, and the light-shielding layer 30 is disposed at least in a portion of the first surface 101a, for example, at least in the optical coupling output region 10D2 of the optical waveguide 10D. The optical waveguide 10D / waveguide substrate includes an optical coupler entry region 10D1 and an optical coupler exit region 10D2. The optical waveguide 10D is disposed on one side of the image light source 20. The image light g1 emitted by the image light source 20 enters the optical waveguide 10D from the optical coupler entry region 10D1 and exits from the optical coupler exit region 10D2.

[0091] It should be noted that the light-shielding layer 30 / light-shielding strip 31 can be manufactured using processes such as imprinting, photolithography, etching, and liquid crystal processing, and the film thickness can be controlled to be relatively uniform. The material of the light-shielding layer 30 / light-shielding strip 31 may include black materials, such as black resin, but is not limited to these.

[0092] Secondly, this application provides a display device, which includes the display system 100 of any one of the above.

[0093] For example, the display device can be augmented reality (AR) glasses, in-vehicle HUD displays, aerial holographic displays, etc., but is not limited to these.

[0094] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0095] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A display system, characterized in that, include: Image light source, configured to emit image light; A first substrate is disposed on the light-emitting side of the image light source. The first substrate includes a first surface and a second surface disposed opposite to each other, with the first surface located on the side of the second surface away from the image light source. A light-shielding layer is disposed at least in a portion of the first surface. The light-shielding layer includes a plurality of light-shielding strips, one end of which is connected to the first surface and the other end of which is away from the first surface. Wherein, the two sides of the light-shielding strip that form an angle with the first surface are both gap portions; At least a portion of the light-shielding strips are arranged at intervals and in parallel along a first direction, which is parallel to the first surface.

2. The display system according to claim 1, characterized in that, The height of the multiple light-shielding strips spaced apart along the first direction in the thickness direction of the first substrate has a trend of first gradually increasing and then gradually decreasing.

3. The display system according to claim 1, characterized in that, At least a portion of the light-shielding strips are arranged at intervals and parallel to each other along a second direction, which is parallel to the first surface and intersects with the second direction.

4. The display system according to claim 3, characterized in that, Multiple light-shielding strips are arranged at intervals along the first direction to form multiple first light-shielding strips, and multiple light-shielding strips are arranged at intervals along the second direction to form multiple second light-shielding strips; The first light-shielding strip intersects with the corresponding second light-shielding strip.

5. The display system according to claim 4, characterized in that, The height of the plurality of first light-shielding strips in the thickness direction of the first substrate has a tendency to gradually increase and then gradually decrease along the first direction; The height of the plurality of second light-shielding strips in the thickness direction of the first substrate has a tendency to gradually increase and then gradually decrease along the second direction.

6. The display system according to claim 1, characterized in that, The ratio of the minimum to the maximum height of the plurality of light-shielding strips in the thickness direction of the first substrate is 0.3-1; and / or, The height of the light-shielding strip in the thickness direction of the first substrate is less than 5 mm; and / or, The thickness of the light-shielding strip is less than 200µm in the direction perpendicular to its extension. And / or, In the arrangement direction of the light-shielding strips, the ratio of the distance between two adjacent light-shielding strips to the total length of the area on the first surface where multiple light-shielding strips are disposed is 10%-100%.

7. The display system according to claim 1, characterized in that, The angle between the light-shielding strip and the first surface is 5 degrees to 90 degrees; and / or, The target angle at which the image light exits the first surface is 5 degrees to 90 degrees; and / or, The absolute value of the difference between the target angle of the image light emitted from the first surface and the angle between the light-shielding strip and the first surface is less than 10 degrees.

8. The display system according to claim 1, characterized in that, Also includes: An anti-reflective layer is disposed on the side of the light-shielding layer away from the first surface.

9. The display system according to claim 1, characterized in that, The display system further includes an optical waveguide, the optical waveguide including a waveguide substrate, the first substrate being the waveguide substrate, and the light-shielding layer being disposed at least in the optical coupling output region of the waveguide substrate; or... The display system further includes a display module configured to emit the image light. The display module includes the image light source and further includes at least one of a protective layer, an encapsulation structure layer, and an optical functional layer. The first substrate is any one of the protective layer, the encapsulation structure layer, and the optical functional layer.

10. A display device, characterized in that, Includes the display system as described in any one of claims 1-9.

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