Optical component, display screen module, and foldable electronic device

Abstract

An optical component (200, 300), a display screen module, and a foldable electronic device (100). The optical component (200, 300) comprises protruding structures (214, 214-1, 214-2, 214-3, 214-4, 214-5, 314) having heights distributed within a certain range. The protruding structures (214, 214-1, 214-2, 214-3, 214-4, 214-5, 314) can reduce the probability of glare caused by ambient light incident on the optical component (200, 300). The distribution of the heights of the protruding structures (214, 214-1, 214-2, 214-3, 214-4, 214-5, 314) within a certain range facilitates increasing the contact area between the protruding structures (214, 214-1, 214-2, 214-3, 214-4, 214-5, 314) and an external structure, reducing stress concentration, and improving the bending resistance of the optical component (200, 300). Applying the optical component (200, 300) to a flexible display screen can improve the bending reliability of the display screen module and the foldable electronic device (100).

Description

Optical components, display modules, and foldable electronic devices

[0001] This application claims priority to Chinese Patent Application No. 202510228442.X, filed on February 27, 2025, entitled "Optical Components, Display Module and Foldable Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of terminal device hardware, specifically to an optical component, a display module, and a foldable electronic device. Background Technology

[0003] By creating a rough texture on the surface of the displays of electronic devices such as mobile phones and tablets, diffuse reflection of screen light can be achieved, reducing screen glare and eye strain for users. However, this rough texture can affect the display quality of electronic devices to some extent; for example, flickering may occur when the display shows white or green images.

[0004] To reduce the adverse effects of anti-glare structures on the display surface on the display effect, an optical structure can be constructed on the display surface of electronic devices to modulate the propagation mode of the light emitted by the display, thereby optimizing the display effect.

[0005] In the application scenarios of foldable electronic devices, or in other words, the aforementioned anti-glare structures and display effect optimization structures applied to flexible displays, there are issues with bending reliability. Summary of the Invention

[0006] This application provides an optical component, a display module, and a foldable electronic device. The optical component includes protrusions with heights distributed within a certain range. These protrusions reduce the probability of glare caused by ambient light incident on the optical component. The height distribution of the protrusions within a certain range increases the contact area between the protrusions and external structures, reduces stress concentration, and improves the bending resistance of the optical component. Applying this optical component to a flexible display can improve the bending reliability of the display module and the foldable electronic device.

[0007] In a first aspect, an optical component is provided, the optical component being bendable, the optical component comprising a film substrate and a plurality of protrusions distributed on the film substrate, the film substrate being composed of a polymer material or glass, wherein the height difference between the tallest protrusion and the shortest protrusion among the plurality of protrusions is greater than or equal to 0.2 micrometers and less than or equal to 2 micrometers.

[0008] In this technical solution, the height of the protruding structures can be distributed within a certain range. The undulating and staggered protrusions make it easier for ambient light from different directions to be reflected when it hits the surface of the optical component, resulting in better anti-glare performance. Furthermore, in this technical solution, the height of the multiple protruding structures is relatively consistent. When in contact with external structures, this increases the number of protrusions, thereby increasing the contact area and reducing stress concentration, which helps improve the bending resistance of the optical component.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the protrusion structure does not contain doped particles, or the protrusion structure includes doped particles with a particle size of less than or equal to 780 nanometers.

[0010] Adding a certain proportion of [agent] to the raised structure is beneficial to improving the wear resistance of optical components.

[0011] In bending scenarios, stress concentration may occur at the interface between the particles and the adhesive material within the protruding structure. This can lead to particle detachment, cracking of the protruding structure, and other issues, affecting the structural stability of the optical component. In this technical solution, the protruding structure may not contain any doped particles, which helps reduce the probability of the aforementioned problems. Furthermore, without particles incorporated into the protruding structure, the adhesive material composing the protruding structure exhibits a higher degree of cross-linking between molecules during the curing process, resulting in a more stable overall structure for the optical component.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the height of the protrusion structure is less than or equal to 2 micrometers, and / or the maximum size of the protrusion structure in the reference plane is greater than or equal to 10 micrometers and less than or equal to 50 micrometers; wherein the reference plane is perpendicular to the thickness direction of the optical component.

[0013] The size of the protruding structure affects the anti-glare performance of optical components. In this technical solution, the height of multiple protruding structures is well consistent. When in contact with external structures, more protruding structures can make contact, thereby increasing the contact area, reducing stress concentration, and improving the wear resistance and service life of optical components.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the elastic modulus of the optical component is greater than or equal to 4 GPa, and / or the elongation at break of the optical component is greater than or equal to 4%.

[0015] The optical components in this technical solution have good elastic deformation capability and high structural stability in bending scenarios.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the film-like substrate comprises colorless polyimide or ultrathin glass.

[0017] Polymer materials possess excellent elastic deformation capabilities, which enables optical components to exhibit superior bending resistance. In contrast, inorganic materials offer higher hardness and surface smoothness, allowing optical components made from ultra-thin glass to possess excellent scratch resistance, hardness, and a pleasant tactile feel.

[0018] In conjunction with the first aspect, in some implementations of the first aspect, the optical component further includes an anti-reflective layer and an anti-fingerprint layer, the anti-reflective layer covering the protruding structure and the anti-fingerprint layer covering the anti-reflective layer.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, the elongation at break of the optical component is greater than or equal to 4.5%.

[0020] When an optical component is composed of multiple functional layers stacked together, the optical component's elongation at break meeting the above threshold requirement can ensure that the optical component has good structural stability in bending scenarios.

[0021] In some implementations of the first aspect, the optical component further includes a diffusion layer located on the side of the substrate opposite to the protrusion structure. The diffusion layer includes a first functional portion and a second functional portion, the refractive indices of the first functional portion and the second functional portion being different.

[0022] The diffusion layer in this technical solution can reduce the probability of flashing light emitted by the display screen and improve the display effect.

[0023] In a second aspect, an optical component is provided, which is bendable. The optical component includes an anti-glare layer and a diffusion layer, which are stacked along the thickness direction of the optical component. The anti-glare layer includes a film-like substrate and a plurality of protrusions distributed on the film-like substrate. The diffusion layer is located on the side of the anti-glare layer opposite to the protrusions. The diffusion layer includes a first functional portion and a second functional portion, wherein the refractive indices of the first functional portion and the second functional portion are different.

[0024] In this technical solution, the glare phenomenon is improved by the protruding structure on the anti-glare layer, and the adverse effects of the anti-glare layer on the display effect of the screen are reduced by the diffusion layer. Both the anti-glare layer and the diffusion layer are composed of flexible materials, which makes the optical components suitable for flexible screens and foldable electronic devices, and can improve their bending resistance.

[0025] In conjunction with the second aspect, in some implementations of the second aspect, the height difference between the tallest of the multiple protrusion structures and the shortest of the protrusion structures is greater than or equal to 0.2 micrometers and less than or equal to 2 micrometers.

[0026] In this technical solution, the height of the raised structure can be distributed within a certain range. The raised structure is undulating and staggered, making it easier for ambient light from different directions to be reflected when it hits the surface of the optical component, thus improving the anti-glare performance of the optical component.

[0027] In conjunction with the second aspect, in some implementations of the second aspect, the protrusion structure does not contain doped particles, or the protrusion structure includes doped particles with a particle size of less than or equal to 780 nanometers.

[0028] Adding a certain proportion of [agent] to the raised structure is beneficial to improving the wear resistance of optical components.

[0029] In bending scenarios, stress concentration may occur at the interface between the particles and the adhesive material within the protruding structure. This can lead to particle detachment, cracking of the protruding structure, and other issues, affecting the structural stability of the optical component. In this technical solution, the protruding structure may not contain any doped particles, which helps reduce the probability of the aforementioned problems. Furthermore, without particles incorporated into the protruding structure, the adhesive material composing the protruding structure exhibits a higher degree of cross-linking between molecules during the curing process, resulting in a more stable overall structure for the optical component.

[0030] In conjunction with the second aspect, in some implementations of the second aspect, the height of the protrusion structure is less than or equal to 2 micrometers, and / or the maximum size of the protrusion structure in the reference plane is greater than or equal to 10 micrometers and less than or equal to 50 micrometers; wherein the reference plane is perpendicular to the thickness direction of the optical component.

[0031] The size of the protruding structure affects the anti-glare performance of optical components. In this technical solution, the height of multiple protruding structures is well consistent. When in contact with external structures, more protruding structures can make contact, thereby increasing the contact area, reducing stress concentration, and improving the wear resistance and service life of optical components.

[0032] In conjunction with the second aspect, in some implementations of the second aspect, the elastic modulus of the anti-glare layer is greater than or equal to 2 GPa, and / or the elongation at break of the optical component is greater than or equal to 4%.

[0033] In this technical solution, the anti-glare layer has good elastic deformation capability and high structural stability in bending scenarios.

[0034] In conjunction with the second aspect, in some implementations of the second aspect, the film-like substrate comprises colorless polyimide or ultrathin glass.

[0035] Polymer materials possess excellent elastic deformation capabilities, which enables optical components to exhibit superior bending resistance. In contrast, inorganic materials offer higher hardness and surface smoothness, allowing optical components made from ultra-thin glass to possess excellent scratch resistance, hardness, and a pleasant tactile feel.

[0036] In conjunction with the second aspect, in some implementations of the second aspect, the optical component further includes an anti-reflective layer and an anti-fingerprint layer, the anti-reflective layer covering the protruding structure and the anti-fingerprint layer covering the anti-reflective layer.

[0037] In conjunction with the second aspect, in some implementations of the second aspect, the elongation at break of the composite structure of the anti-glare layer, anti-reflection layer and anti-fingerprint layer is greater than or equal to 4.5%.

[0038] When an optical component is composed of multiple functional layers stacked together, the optical component's elongation at break meeting the above threshold requirement can ensure that the optical component has good structural stability in bending scenarios.

[0039] In conjunction with the second aspect, in some implementations of the second aspect, the second functional part extends along the thickness direction of the optical component, the first functional part surrounds the outer periphery of the second functional part, and the height of the second functional part is equal to the thickness of the diffusion layer.

[0040] When the height of the second functional part is equal to the thickness of the diffusion layer, in a bending scenario, the first and second functional parts in the diffusion layer can deform synchronously and jointly bear the external force. This helps to reduce the probability of the first and second functional parts separating due to stress concentration, which helps to improve the bending reliability of the diffusion layer and enhance the bending resistance of the optical components.

[0041] In conjunction with the second aspect, in certain implementations of the second aspect, the diffusion layer satisfies at least one of the following: an elastic modulus at 25°C greater than or equal to 300 MPa and less than or equal to 600 MPa; an elastic modulus at 60°C greater than or equal to 30 MPa and less than or equal to 60 MPa; an elastic modulus at -20°C greater than or equal to 1.3 GPa and less than or equal to 1.6 GPa; an elongation at break at 25°C greater than or equal to 35% and less than or equal to 40%; an elongation at break at -20°C greater than or equal to 1.5% and less than or equal to 2%; and a thickness greater than or equal to 30 micrometers and less than or equal to 60 micrometers.

[0042] Through simulation and experimental verification, the diffusion layer that meets the above performance requirements is more suitable for the daily use of foldable electronic devices and improves the bending resistance of foldable electronic devices during use.

[0043] In conjunction with the second aspect, in some implementations of the second aspect, the optical component further includes a first adhesive layer located between the anti-glare layer and the diffusion layer, the first adhesive layer having a thickness greater than or equal to 15 micrometers and less than or equal to 50 micrometers.

[0044] Through simulation and experimental verification, it was found that when the thickness of the first adhesive layer meets the above requirements, the bonding strength between the anti-glare layer and the diffusion layer is high, the structural stability of the optical component is good, and the overall thickness is thinner.

[0045] In conjunction with the second aspect, in some implementations of the second aspect, the optical component further includes a second adhesive layer located on the side of the diffusion layer opposite to the anti-glare layer, the second adhesive layer having a thickness greater than or equal to 15 micrometers and less than or equal to 50 micrometers, and the thickness of the second adhesive layer being greater than the thickness of the first adhesive layer.

[0046] The thickness of the second adhesive layer being greater than that of the first adhesive layer helps to improve the bonding strength between the optical components and the display assembly, thus enhancing the structural stability of the display module. Through simulation and experimental verification, it was found that while meeting the above requirements for the thickness of the second adhesive layer, the overall thickness of the optical components is thinner, while still maintaining sufficient bonding strength.

[0047] In conjunction with the second aspect, in some implementations of the second aspect, the first adhesive layer comprises an optically transparent adhesive that satisfies at least one of the following: a creep recovery rate greater than or equal to 80%; an elastic modulus at -20°C less than or equal to 400 kPa; an elastic modulus at 25°C greater than or equal to 30 kPa and less than or equal to 50 kPa; an elastic modulus at 60°C greater than or equal to 10 kPa and less than or equal to 30 kPa; and an elastic modulus at 80°C greater than or equal to 5 kPa and less than or equal to 25 kPa.

[0048] Through simulation and experimental verification, optically transparent adhesives that meet the above performance requirements are more suitable for the daily use of foldable electronic devices, improving the bending resistance of foldable electronic devices during use.

[0049] Thirdly, a display module is provided, including a display panel and an optical component as described in the first aspect and any possible implementation thereof, or an optical component as described in the second aspect and any possible implementation thereof, wherein the optical component is located on the light-emitting side of the display panel and is stacked with the display panel in the light-emitting direction.

[0050] Fourthly, a foldable electronic device is provided, including a housing and a display module as described in the third aspect and any possible implementation thereof, the display module being fixedly connected to the housing. Attached Figure Description

[0051] Figures 1 and 2 are schematic diagrams of the structure of a foldable electronic device provided in an embodiment of this application.

[0052] Figure 3 is a schematic diagram of the structure of a flexible screen provided in an embodiment of this application.

[0053] Figure 4 is a schematic diagram of the structure of an optical component provided in an embodiment of this application.

[0054] Figure 5 is a schematic diagram of the structure of an anti-glare layer provided in an embodiment of this application.

[0055] Figures 6 and 7 are enlarged views of the anti-glare layer provided in the embodiments of this application.

[0056] Figure 8 is a schematic diagram of another optical component provided in an embodiment of this application.

[0057] Figure 9 is a schematic diagram of the structure of another optical component provided in an embodiment of this application.

[0058] Figure 10 is a schematic diagram of the structure of a diffusion layer provided in an embodiment of this application.

[0059] Figure 11 is a schematic diagram of the structure of the second functional part of a diffusion layer provided in an embodiment of this application.

[0060] Figure 12 is a schematic diagram of the structure of another optical component provided in an embodiment of this application.

[0061] Figure 13 is a schematic diagram of the structure of another optical component provided in an embodiment of this application.

[0062] Figure 14 is a schematic diagram of the structure of another optical component provided in an embodiment of this application.

[0063] Figures 15 and 16 are schematic diagrams of the structure of another optical component provided in the embodiments of this application. Detailed Implementation

[0064] The embodiments of this application are described in detail below, and examples of these embodiments are illustrated in the accompanying drawings. In the drawings, the same or similar reference numerals denote 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 this application, and should not be construed as limiting this application.

[0065] It should be noted that, in the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in this article is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0066] In the embodiments of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more, and "at least one" and "one or more" refer to one, two, or more than two. The singular expressions "a," "an," "the," "the," "this," and "this" are intended to also include expressions such as "one or more," unless the context explicitly indicates otherwise.

[0067] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. In the description of this application, it should be understood that the terms “center,” “longitudinal,” “lateral,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and for 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.

[0068] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0069] In this embodiment, the foldable electronic device 100 can be a mobile phone, tablet computer, smartwatch, e-reader, laptop computer, wearable device, or other electronic device with folding functionality. For ease of understanding, the embodiments shown in Figures 1 and 2 are illustrated using a foldable mobile phone as an example.

[0070] For ease of description, the direction parallel to the folding axis of the foldable electronic device 100 is defined as the X direction, the direction perpendicular to the folding axis of the foldable electronic device 100 is defined as the Y direction, and the direction perpendicular to the screen when the foldable electronic device 100 is in the unfolded state is defined as the Z direction. The Z direction is perpendicular to both the X and Y directions. These definitions of the X, Y, and Z directions also apply to the accompanying drawings described below. It should be noted that the above definitions of the X, Y, and Z directions are merely for the convenience of describing the positional and connection relationships between the components in the embodiments of this application and should not be construed as limiting the embodiments of this application.

[0071] Before formally introducing the embodiments of this application, the terms that may be used in the following examples will be explained and described.

[0072] Elastic modulus: A mathematical description of the tendency of an object or material to undergo elastic deformation (non-permanent deformation) when a force is applied. The elastic modulus of an object is defined as the slope of the stress-strain curve in the elastic deformation zone.

[0073] Elongation at break: The ratio of the difference between the gauge length at break and before stretching to the gauge length before stretching. The elongation at break of a material or structure can be measured by test.

[0074] In the related technologies of this application, the following test method can be used to verify whether the elongation at break of a material or structure meets the requirements: 1. Sample preparation: Cut a 10mm*100mm sample using tools such as a laser cutter. The sample should have an edge serration of less than or equal to 2μm. Measure and record the thickness and width of the sample. 2. Fix the sample between the upper and lower clamps of a mechanical testing machine, aligning the longitudinal axis of the sample with the center line of the clamps. Maintain a clamp spacing of 50mm and an initial load of less than 1N. 3. Set the speed to 1mm / s and start the mechanical testing machine for testing. 4. Stop the machine when the sample reaches the predetermined test strain, remove the sample, observe whether it breaks, and record the results. The test should be performed at least three times. This test method is only an exemplary example and does not constitute a limitation on the elongation at break.

[0075] Roughness, also known as surface roughness, refers to the non-smooth characteristics of a surface and is related to human perception of surface texture (tactile sensation). From a mathematical perspective, it is related to the spatial variation structure of the surface and is essentially a multi-scale property.

[0076] Haze is the ratio of scattered light flux that deviates from the direction of incident light when parallel light rays pass through a material sample to transmitted light flux. Haze is expressed as a percentage, so the unit of haze is a percentage value.

[0077] Light transmittance: Light transmittance represents the ability of light to pass through a medium; it is the percentage of luminous flux that passes through the medium relative to the incident luminous flux. In other words, after absorption and reflection, a given amount of light passes through a medium, representing the percentage of the luminous flux that passes through the medium.

[0078] Creep is the slow and permanent deformation of a solid material under stress. It occurs as a result of prolonged stress below the material's yield strength. Creep recovery rate indicates the extent to which a material can recover to its original state after creep, when the external force is removed. A creep recovery rate of 1 indicates that the material can fully recover to its original state.

[0079] Flash point phenomenon: When light emitted from a display screen is incident on an optical device with light scattering capability, it will be scattered. When the propagation direction of the scattered light is relatively concentrated and not dispersed enough, crosstalk will occur between scattered light of different wavelengths.

[0080] Referring to Figure 1, the foldable electronic device 100 may include a flexible screen 110 and a housing 120. The housing 120 has a receiving space for accommodating various components of the foldable electronic device 100. The flexible screen 110 is disposed in the receiving space formed by the housing 120 and connected to the housing 120. The flexible screen 110 is a screen structure that can be at least partially bent. The housing 120 also serves to protect the foldable electronic device 100 and support the entire device.

[0081] The flexible screen 110 is used to display images. Figures 1 and 2 schematically represent the flexible screen 110 with a structure filled with a dot matrix pattern. The flexible screen 110 is highly flexible and bendable, providing users with a new interaction method based on its bendability. The display panel of the flexible screen 110 can be any of the following: liquid crystal display (LCD), organic light-emitting diode (OLED), active-matrix organic light-emitting diode (AMOLED), flex light-emitting diode (FLED), quantum dot light-emitting diode (QLED), etc. This application embodiment does not limit the choice of these types. In this application embodiment, the flexible screen 110 has a light-emitting surface capable of displaying images. The side surface of the flexible screen 110 opposite to the light-emitting surface can be referred to as the back surface of the flexible screen 110.

[0082] The back of the flexible screen 110 is housed in the receiving space formed by the housing 120 and is not visible to the user.

[0083] Referring again to Figure 1, in some examples, the foldable electronic device 100 may further include a connecting mechanism 130, which includes a rotation axis 1301. This connecting mechanism 130 connects two parts of the housing 120 (as shown in Figure 1, the first housing 124 and the second housing 125) to allow one part of the housing 120 to rotate relative to the other part about the rotation axis 1301; for example, the first housing 124 and the second housing 125 rotate relative to each other about the rotation axis 1301. Accordingly, electronic components disposed on the first housing 124 or the second housing 125 can rotate about the rotation axis 1301, thereby enabling the folding and unfolding of the foldable electronic device 100.

[0084] In some examples, the flexible screen 110 may include a first display area 111 corresponding to the first housing 124, a second display area 112 corresponding to the second housing 125, and a third display area 113 corresponding to the connecting mechanism 130, with the third display area 113 located between the first display area 111 and the second display area 112. Under the action of the connecting mechanism 130, the first housing 124 and the second housing 125 may move closer to or further away from each other, and correspondingly, the third display area 113 will bend, and the first display area 111 and the second display area 112 may move closer to or further away from each other, so that the flexible screen 110 can be folded or unfolded. In the embodiments of this application, during the process of folding or unfolding the flexible screen 110 along the rotation axis 1301, the third display area 113 of the flexible screen 110 bends.

[0085] The foldable electronic device 100 shown in Figure 1 is in its unfolded state. In the unfolded state, the angle between the first housing 124 and the second housing 125 can be approximately 180°. The flexible screen 110 can be in the unfolded state shown in Figure 1, thus facilitating user access to the large screen.

[0086] Figure 2 illustrates two possible folding states of the foldable electronic device 100. In the folded state, the first housing 124 and the second housing 125 are parallel to each other, and the flexible screen 110 is bent to its maximum degree.

[0087] Figure 2, schematic diagram 2-1, shows the foldable electronic device 100 with its screen folded inward, i.e., inward folded state. In the inward folded state, referring to the schematic diagram of section AA, the first display area 111 and the second display area 112 are opposite to each other, the first housing 124 and the second housing 125 are opposite to each other, and the third display area 113 is bent.

[0088] Figure 2, schematic diagram 2-2, shows the foldable electronic device 100 with its screen folded outwards, i.e., in the outward-folded state. In the outward-folded state, referring to the BB cross-sectional diagram, the first display area 111 and the second display area 112 are opposite to each other, the first housing 124 and the second housing 125 are opposite to each other, and the third display area 113 is bent. It can be understood that when the foldable electronic device 100 is in the folded state, it is currently bent, and the degree of bending of the foldable electronic device 100 reaches its maximum.

[0089] In this embodiment, the foldable electronic device 100 can switch between a folded state and an unfolded state. When the foldable electronic device 100 is in the folded state, it occupies relatively little space; when it is in the unfolded state, it can display a relatively large screen to increase the user's viewing range.

[0090] It should be understood that Figures 1 and 2 only schematically illustrate some components included in the foldable electronic device 100, and the shape, size, and construction of these components are not limited by Figures 1 and 2. In other embodiments, the foldable electronic device 100 may include more or fewer components than illustrated, and this application embodiment does not limit this. In other embodiments, the type of foldable electronic device 100 is different, and the components included in the foldable electronic device 100 are different; the foldable electronic device structure provided in this application embodiment is only illustrative.

[0091] It should also be understood that Figures 1 and 2 only schematically illustrate that the foldable electronic device 100 includes two foldable portions (a first housing 124 and a second housing 125), meaning the foldable electronic device 100 has one folding axis. In some other embodiments, the foldable electronic device 100 may also include three or more foldable portions, correspondingly having two or more folding axes, allowing the user to fold it multiple times along multiple folding axes. As the number of foldable portions of the foldable electronic device 100 increases, the space occupied by the foldable electronic device 100 in the folded state can be further reduced while maintaining the same screen size in the unfolded state; or, while occupying the same space in the folded state, the displayed screen area can be further enlarged in the unfolded state.

[0092] The flexible screen 110 is generally a multi-layer stacked structure. Figure 3 shows a schematic structural diagram of the flexible screen 110. For example, the flexible screen 110 may include a support layer 101, a display layer 102, an impact protection layer 103, and a functional layer 104 stacked together.

[0093] The support layer 101 is located at the bottom of the flexible screen 110. It has a certain degree of rigidity and can play a supporting role.

[0094] The display layer 102 is located between the support layer 101 and the impact protection layer 103, and includes multiple pixel units for displaying images. The display layer 102 may include the main constituent materials of the display panel of the flexible screen 110. The constituent materials of the display layer 102 may vary depending on the type of display panel. This application does not limit the composition of the display layer 102.

[0095] The protective layer 103 is located between the display layer 102 and the functional layer 104. It has a certain degree of impact resistance and abrasion resistance, and can resist external impacts to protect the display layer 102. In some embodiments, the protective layer 103 may also be referred to as a cover plate.

[0096] The functional layer 104 is located above the protective layer 103 and has scratch resistance. The functional layer 104 can be easily separated from the protective layer 103 for replacement or removal when needed.

[0097] In some examples, functional layer 104 can be used to reduce glare caused by ambient light reflection from the flexible screen 110. In some examples, functional layer 104 can be used to adjust the propagation mode of light emitted from display layer 102, thereby improving the display effect of flexible screen 110. In some examples, functional layer 104 can be used to reduce the adhesion of fingerprints, sweat, and other stains to the surface of flexible screen 110.

[0098] It is understood that the film layer stacking structure shown in Figure 3 is merely exemplary. In other embodiments, the flexible screen 110 may also have other film layer stacking methods, such as the flexible screen 110 may also include a touch layer, etc. This application embodiment does not limit this.

[0099] During the bending process of the foldable electronic device 100, different internal stresses of different functional layers (such as functional layer 104, protective layer 103, etc.) of the flexible screen 110 will be generated. The presence of internal stress may cause different displacements / deformations of different regions within the functional layers of the flexible screen 110. As a result, damage may occur inside the functional layers (such as separation of different materials that make up the functional layers), and delamination may also occur between adjacent functional layers. These changes may all lead to the failure of the flexible screen 110.

[0100] To improve the reliability of the flexible screen 110 and the foldable electronic device 100, this application provides an optical component that is bendable and has high bend reliability. Applying this optical component to the flexible screen 110 can improve the display effect and durability of the flexible screen 110 in bending scenarios.

[0101] Optical components can be disposed on the outer layer of the flexible screen 110 and used to implement the functions of the functional layer 104 mentioned above. In other words, the optical components provided in this application embodiment can be regarded as an example of the functional layer 104 mentioned above, and the position of the optical components in the flexible screen 110 can be referred to the relevant description of the functional layer 104 mentioned above.

[0102] Figure 4 shows an optical component 200 provided in an embodiment of this application. The optical component 200 may include an anti-glare layer 210, which can be used to reduce the glare phenomenon caused by ambient light incident on the flexible screen 110 and reduce eye fatigue for users.

[0103] In some examples, the anti-glare layer 210 may include a substrate 212 and protrusions 214 located on the substrate 212. The number of protrusions 214 may be multiple, and the multiple protrusions 214 may be distributed on the surface of the substrate 212.

[0104] In some examples, in order to improve the anti-glare performance of the anti-glare layer 210, the surface roughness (Ra1) of the side of the anti-glare layer 210 containing the protrusion structure 214 and / or the haze (Ha1) of the anti-glare layer 210 can meet certain requirements.

[0105] For example, the surface roughness Ra1 of the anti-glare layer 210 satisfies: 0.1≤Ra1≤0.3. For example, Ra1 can be 0.12, 0.14, 0.16, 0.18, 0.20, 0.22, 0.25, 0.28, etc.

[0106] For example, the haze Ha1 of the anti-glare layer 210 satisfies: 0 ≤ Ha1 ≤ 40%. For example, Ha1 can be 1%, 2%, 3%, 4%, 5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, etc.

[0107] The anti-glare performance of the anti-glare layer 210 is related to the raised structure 214. In other words, the anti-glare performance of the anti-glare layer 210 can be improved by adjusting one or more of the distribution, shape, size, etc. of the raised structure 214.

[0108] In some examples, the protrusions 214 are distributed irregularly on the surface of the substrate 212, or the protrusions 214 may be randomly distributed on the surface of the substrate 212.

[0109] As one implementation, the raised structure 214 can be manufactured using an imprinting process. Specifically, the raised structure 214 can be formed by curing an adhesive material (such as a UV-curable adhesive or a thermoplastic curable adhesive) located on a substrate 212. This is achieved by pressing a plate-shaped mold with randomly distributed recesses onto the surface of the adhesive material and then curing the adhesive material. The adhesive material can form raised structures at positions corresponding to the recesses of the mold, and the distribution of the raised structures is the same as the distribution of the recesses on the mold, i.e., random.

[0110] As an example, the aforementioned adhesive material can be one or more of the following: epoxy resin adhesive, polyurethane adhesive, acrylic resin adhesive, polyimide adhesive, etc.

[0111] As another implementation, the protrusion structure 214 can be manufactured using a coating process. Specifically, the protrusion structure 214 can be composed of particles of different shapes and sizes. By coating a mixture containing particles and solution onto a substrate 212, the particles can adhere to the substrate 212 via the solute (mainly polymer) after the solvent in the solution evaporates. When the mixture is coated onto the surface of the substrate 212, the particles can be randomly distributed, and correspondingly, the protrusion structure 214 composed of particles also exhibits a randomly distributed state.

[0112] When ambient light is incident on the surface of the optical structure 214, it will be scattered. The random distribution of the surface of the optical structure 214 has different scattering effects on light at different positions. This can improve the scattering effect of the optical component 200 on light from different directions to a certain extent. Less ambient light will be reflected by the optical component 200 and enter the human eye, which is beneficial to improving the anti-glare performance of the optical component 200.

[0113] This application does not limit the specific shape of the protrusion structure 214. It is understood that the protrusion structure 214 can have a variety of different shapes depending on the manufacturing process.

[0114] In some examples, the protrusion structure 214 can be spherical or irregularly spherical (e.g., hemisphere, three-quarter sphere, ellipsoid, oblate spheroid, elongated spheroid, etc.).

[0115] In some examples, the surface of the protrusion 214 can be a smooth curved surface, or the surface of the protrusion 214 can be rough, or the surface of the protrusion 214 can include one or more planes.

[0116] For example, the surface of the protrusion structure 214 may include one or more recesses, and / or the surface of the protrusion structure may also include one or more protrusions.

[0117] Figure 5 shows a top view of the optical component 200 in Figure 4. Various protrusions 214 of different shapes are randomly distributed on the substrate 212. Two adjacent protrusions 214 can be separated by a groove structure, or two adjacent protrusions 214 can be connected to each other, or some areas between two adjacent protrusions 214 can be separated by a groove structure and some areas can be connected to each other.

[0118] The size of the protrusion structure 214 also has a certain impact on the surface roughness and / or haze of the anti-glare layer 210.

[0119] In some examples, the maximum size of the projection of the protrusion 214 onto the reference plane can meet certain requirements. Here, the reference plane can refer to a plane perpendicular to the thickness direction of the anti-glare layer 210.

[0120] For example, the maximum size Wmax of the projection of the protrusion structure 214 onto the reference plane can satisfy: 5um ≤ Wmax ≤ 100um. For example, Wmax can be 10um, 20um, 30um, 40um, 50um, 60um, 70um, 80um, 90um, etc.

[0121] For example, if the projection of the protrusion 214 onto the reference plane is a circle, then the length of the circle's diameter satisfies the above-mentioned requirement regarding Wmax; or, for example, if the projection of the protrusion 214 onto the reference plane is a square, then the length of the square's diagonal satisfies the above-mentioned requirement regarding Wmax.

[0122] As an example, referring to Figure 5, the maximum size of the projection of the protrusion structure 214-1 in the reference plane is W1, and the maximum size of the projection of the protrusion structure 214-2 in the reference plane is W2. W1 is approximately 45 μm and W2 is approximately 48 μm, both of which meet the above requirements for Wmax.

[0123] In some examples, the height and height distribution of the protrusion structure 214 can meet certain requirements. As one implementation, the height of the protrusion structure 214 can be measured by the vertical distance between the highest point (vertex) and the lowest point (valley) of the protrusion structure 214, and the height distribution of multiple protrusion structures 214 can be measured by the difference between the maximum and minimum height of the protrusion structure 214 (i.e., the height difference between the highest protrusion structure and the lowest protrusion structure).

[0124] For example, the height H of the protrusion structure 214 can satisfy: 1um ≤ H ≤ 10um. For example, H can be 2um, 3um, 4um, 5um, 6um, 7um, 8um, 9um, etc.

[0125] Figure 6 shows a partial enlarged view of region A1 of the protruding structure 214 in Figure 4. As an example, in Figure 6, point P1 can be considered the vertex of the protruding structure 214-3, and point V1 can be considered the valley point of the protruding structure 214-3. The height difference between points P1 and V1 in the thickness direction of the anti-glare layer 210 is H1, which can be considered the height of the protruding structure 214-3. The value of H1 can be greater than or equal to 1 micrometer and less than or equal to 10 micrometers.

[0126] The height of the multiple protrusions 214 in the above example is well consistent. When in contact with the external structure, the number of protrusions 214 in contact with the external structure can be increased, thereby increasing the contact area under stress, reducing stress concentration, and improving the wear resistance and service life of the anti-glare layer 210.

[0127] For example, the height difference ΔH between the tallest and shortest protrusions among the multiple protrusions 214 can satisfy: 0.2um ≤ ΔH ≤ 2um. For example, ΔH can be 0.25um, 0.3um, 0.35um, 0.4um, 0.45um, 0.5um, 0.8um, 1um, 1.6um, 1.9um, etc.

[0128] Figure 7 shows a partial enlarged view of region A2 of the protrusion structure 214 in Figure 4. As an example, in Figure 7, protrusion structure 214-4 is the tallest of the multiple protrusion structures 214 on the anti-glare layer 210, and protrusion structure 214-5 is the shortest. Point P2 can be considered the vertex of protrusion structure 214-4, and point P3 can be considered the vertex of protrusion structure 214-5. The height difference between points P2 and P3 in the thickness direction of the anti-glare layer 210 is ΔH1, which can be considered the height difference between protrusion structures 214-4 and 214-5. ΔH1 can be greater than or equal to 0.2 μm and less than or equal to 2 μm.

[0129] In the above example, the height of the protrusion structure 214 can be distributed within a certain range. The protrusion structure 214 on the anti-glare layer 210 is undulating and staggered, and ambient light from different directions is more easily scattered when it is incident on the surface of the anti-glare layer 210, so the anti-glare performance of the anti-glare layer 210 is better.

[0130] When the optical component 200 is mounted on the display screen, it may obstruct the light emitted from the display screen to a certain extent. In order to reduce the obstruction of screen light by the optical component 200 and ensure the display effect of the display screen, the light transmittance of the anti-glare layer 210 can meet certain requirements.

[0131] For example, the light transmittance T1 of the anti-glare layer 210 can satisfy: T1≥85%. For example, T1 can be 86%, 88%, 90%, 92%, 94%, 95%, 98%, etc.

[0132] In order to improve the bending resistance of the optical component 200, or in other words, to improve the reliability of the optical component 200 in bending scenarios, the mechanical properties of the anti-glare layer 210 can meet certain requirements.

[0133] In some examples, the elastic modulus E1 (at room temperature, 25℃) of the anti-glare layer 210 can satisfy: E1≥2GPa. For example, E1 can be 3GPa, 4GPa, 5GPa, 5.5GPa, 6GPa, 6.5GPa, 7GPa, 7.5GPa, 8GPa, etc.

[0134] In some examples, the elongation at break ε1 (at room temperature, 25℃) of the anti-glare layer 210 can satisfy: ε1≥4%. For example, ε1 can be 5%, 6%, 6.5%, 7.5%, 10%, 12.5%, 15%, 20%, 25%, 30%, 40%, 50%, etc.

[0135] In bending scenarios, the deformation of the anti-glare layer 210 is also related to the thickness of the anti-glare layer 210. Therefore, in order to improve the bending resistance of the optical component 200, the thickness of the anti-glare layer 210 can meet certain requirements.

[0136] In some examples, the thickness d1 of the anti-glare layer 210 can satisfy: 20um ≤ d1 ≤ 90um. For example, d1 can be 30um, 40um, 50um, 60um, 70um, 80um, etc.

[0137] For example, the height d11 of the substrate 212 can satisfy: 15um ≤ d11 ≤ 80um. For example, d11 can be 20um, 23um, 28um, 30um, 40um, 50um, 60um, 70um, etc.

[0138] In bending scenarios, the bending resistance of the anti-glare layer 210 is also related to the material composition of the anti-glare layer 210.

[0139] In some examples, the substrate 212 in the anti-glare layer 210 may include a polymer material that has good elastic deformation capability, which enables the anti-glare layer 210 to have excellent bending resistance.

[0140] For example, the substrate 212 may be composed of one or more of the following materials: polyethylene terephthalate (PET), polycarbonate (PC), or colorless polyimide (CPI).

[0141] In some examples, the substrate 212 in the anti-glare layer 210 may include an inorganic material with good elastic deformation capability. Compared with polymer materials, inorganic materials can have higher hardness and surface smoothness, and the anti-glare layer 210 prepared using the aforementioned inorganic materials can have excellent scratch resistance, hardness and good tactile feel.

[0142] For example, the substrate 212 may be composed of one or more of the following materials: ultra-thin glass (UTG), geopolymer cementitious materials, nanocomposite materials, viscoelastic inorganic glass, etc.

[0143] To improve the hardness and wear resistance of the optical component 200, the protrusion structure 214 on the substrate 212 may include some particles with high hardness. These particles may be metal compounds and / or non-metal compounds, such as alumina, silicon dioxide, silicon carbide, carbon nanotubes, diamond powder, etc.

[0144] For example, the particle size d2 of the particles contained in the protrusion structure 214 can satisfy: d2≤780nm. For example, d2 can be much smaller than 780nm, such as 20nm, 30nm, 50nm, etc., or d2 can also be 100nm, 200nm, 300nm, 400nm, 500nm, 600nm, 700nm, etc.

[0145] As shown in Figure 4, the raised structure 214 may include a certain proportion of reinforcing phase 10. The reinforcing phase 10 can be the aforementioned high-hardness particles, and can be spherical, approximately spherical, polyhedral, etc., which are not limited in this application. It is understood that in this example, the anti-glare layer 210 can be composed of a substrate 212, a raised structure 214, and reinforcing phase 10.

[0146] As an example, the ratio of the amount of the aforementioned particles to the total mass of the protrusion structure 214 is approximately 1% to 2%.

[0147] The particles in the protrusion structure 214 mentioned above have a small particle size, which is in the nanometer range. In this case, the protrusion structure 214 can be manufactured by the imprinting process described above.

[0148] For example, the particle size d2 of the particles contained in the protrusion structure 214 can satisfy: 1um ≤ d2 ≤ 15um. For example, d2 can be 2um, 3um, 4um, 5um, 6um, 7um, 8um, 9um, 12um, 14um, etc.

[0149] As shown in Figure 8, the protruding structure 214 may include a reinforcing phase 214a and a functional layer 214b. The functional layer 214b may be located between the substrate 212 and the reinforcing phase 214a, and may be composed of polymers such as polyurethane or acrylic resin. The reinforcing phase 214a may be the aforementioned high-hardness particles, and may be spherical, approximately spherical, polyhedral, etc., without limitation in this application. It is understood that in this example, the anti-glare layer 210 may be composed of a substrate 212, the reinforcing phase 214a, and the functional layer 214b.

[0150] The particles in the aforementioned protrusion structure 214 have a relatively large particle size, on the micrometer scale. In this case, the protrusion structure 214 can be fabricated by coating the substrate 212 surface with a mixture containing particles, as described above. The aforementioned functional layer 214b can be a solute in the mixture whose main component is resin.

[0151] In bending scenarios, stress concentration may occur at the interface between the particles within the raised structure 214 and the adhesive material (or resin material). This can lead to particle detachment, cracking of the raised structure 214, and affect the structural stability of the anti-glare layer 210. To avoid this, the raised structure 214 may not contain the aforementioned particles. In other words, the raised structure 214 may be composed of only one type of material, such as an adhesive material or a resin material. When no particles are incorporated into the raised structure 214, the degree of cross-linking between molecules in the adhesive material or resin material constituting the raised structure 214 is higher during the curing process, and the overall structure of the anti-glare layer 210 is more stable.

[0152] In some examples, to facilitate assembly of the optical component 200 with other display components, the optical component 200 may also include an adhesive layer 215, which may be composed of adhesive materials having good optical transparency, adhesive strength, and elastic deformation capability. Examples include one or more of optically clear adhesive (OCA), epoxy resin, silicone adhesive, and polyurethane adhesive.

[0153] In order to improve the bonding strength between the anti-glare layer 210 and the display component, and to control the thickness of the optical component 200 as much as possible, reduce the deformation of the adhesive layer 215 in bending scenarios, and improve the structural stability of the optical component 200, the thickness of the adhesive layer 215 can meet certain requirements.

[0154] For example, the thickness d3 of the adhesive layer 215 can satisfy: 15um ≤ d3 ≤ 50um. For example, d3 can be 18um, 20um, 25um, 30um, 35um, 40um, 45um, etc.

[0155] As an exemplary embodiment, the anti-glare layer 210 of the optical component 200 has an elastic modulus E1 greater than or equal to 2 GPa at room temperature, and an elongation at break ε1 greater than or equal to 4% at room temperature. Thus, in everyday bending scenarios, the anti-glare layer 210 can not only withstand higher bending stress and recover its deformation well under external force, maintaining good dimensional stability; the optical component 200 can also achieve bending at large angles, exhibiting good folding mechanical properties, and is suitable for foldable electronic devices with different bending angles.

[0156] As another exemplary embodiment, the substrate 212 of the optical component 200 is made of colorless polyimide or ultra-thin glass, and the raised structure 214 is made of acrylic resin, achieved through an imprinting process. This resin cures quickly and exhibits good flexibility after curing, with an elongation at break meeting the bending resistance requirements of the optical component 200. Thus, the optical component 200, while possessing excellent anti-glare performance and reducing user eye fatigue, is also suitable for the bending scenarios of foldable electronic devices. In other words, foldable electronic devices using the optical component 200 not only have excellent anti-glare performance, but this excellent anti-glare performance will not be damaged by bending operations during daily use, maintaining a good level throughout the entire service life of the foldable electronic device.

[0157] As another exemplary embodiment, the height of the protrusion structure 214 can be less than or equal to 2 micrometers, and the height difference between the tallest and shortest protrusion structure among the plurality of protrusion structures 214 can be about 1 micrometer. The maximum size of the protrusion structure 214 in the reference plane is approximately between 10 micrometers and 50 micrometers. The optical component 200 including the above-mentioned protrusion structure 214 can have good anti-glare performance, and the overall surface area of ​​the protrusion structure 214 is larger. Due to the lower probability of structural damage caused by stress concentration, the optical component 200 has higher structural reliability in bending scenarios, and the display function of the foldable electronic device using the optical component 200 is more stable.

[0158] As another exemplary embodiment, the thickness of the substrate 212 of the optical component 200 is approximately 50 micrometers, the height of the protruding structure 214 is approximately 4 micrometers, and the height difference between the tallest and shortest protruding structures among the multiple protruding structures 214 can be approximately 1 micrometer. The elastic modulus E1 of the anti-glare layer 210 at room temperature is greater than or equal to 2 GPa, and the elongation at break ε1 at room temperature is greater than or equal to 4%. In this way, the overall deformation of the optical component 200 during bending is small, and the deformation generated by the protruding structure 214 and the substrate 212 during bending can be approximately the same, making it less likely for the two functional layers to delaminate, and thus the optical component 200 has better bending resistance.

[0159] Figure 9 shows another optical component 300 provided in the embodiment of this application. Compared with the optical component 200 mentioned above, the optical component 300 includes a diffusion layer in addition to the anti-glare layer. The diffusion layer can reduce the probability of flashing after the light emitted by the display screen is incident on the optical component 300, thereby improving the display effect of the display screen.

[0160] As shown in Figure 9, the optical component 300 may include an anti-glare layer 310 and a diffusion layer 320. The anti-glare layer 310 and the diffusion layer 320 may be stacked along the thickness direction of the optical component 300, and the anti-glare layer 310 and the diffusion layer 320 may be connected by a first adhesive layer 315.

[0161] The anti-glare layer 310 can be used to reduce the probability of glare caused when ambient light strikes the optical component 300. The anti-glare layer 310 may include a substrate 312 and a raised structure 314 located on the substrate 312. For details regarding the material composition and performance requirements of the substrate 312, please refer to the description of the substrate 212 above; for details regarding the material composition and performance requirements of the raised structure 314, please refer to the description of the raised structure 214 above.

[0162] To ensure the display effect of the screen, the diffusion layer 320 of the optical component 300 can meet certain optical characteristic requirements.

[0163] For example, the transmittance T2 of the diffusion layer 320 can satisfy: T2≥85%. For example, T2 can be 88%, 90%, 92%, 95%, 98%, etc.

[0164] For example, the haze Ha21 of the diffusion layer 320 at a positive viewing angle can satisfy: Ha21≥70%. For example, Ha21 can be 72%, 75%, 80%, 85%, 90%, 95%, etc.

[0165] For example, the transmittance of light after it is incident on the diffusion layer 320 increases as the angle α between the light and the plane of the diffusion layer 320 increases, wherein 0°≤α≤90°.

[0166] For example, when a collimated ray is incident on the diffuser layer 320 at an angle of 40° to the plane of the diffuser layer 320, the transmittance of the ray is T2(40°); when a collimated ray is incident on the diffuser layer 320 at an angle of 30° to the plane of the diffuser layer 320, the transmittance of the ray is T2(30°); and when a collimated ray is incident on the diffuser layer 320 at an angle of 15° to the plane of the diffuser layer 320, the transmittance of the ray is T2(15°). T2(40°), T2(30°), and T2(15°) can satisfy: T2(40°) ≥ T2(30°) ≥ T2(15°).

[0167] The optical properties of the diffusion layer 320 are related to its structure. In other words, if the structure of the diffusion layer 320 meets certain requirements, the optical properties of the diffusion layer 320 can meet the above performance requirements.

[0168] Figure 9 shows a schematic diagram of the cross-section of the diffusion layer 320 perpendicular to the reference plane, and Figure 10 can be regarded as a schematic diagram of the cross-section of the diffusion layer 320 parallel to the reference plane.

[0169] Referring to Figures 9 and 10, in some examples, the diffusion layer 320 may include a first functional portion 322 and a second functional portion 324. The first functional portion 322 may surround the outer periphery of the second functional portion 324, or the second functional portion 324 may be incorporated into the first functional portion 322. In this case, the diffusion layer 320 may be substantially thin-film in shape, the first functional portion 322 may be a substrate constituting the diffusion layer 320, and the second functional portion 324 may be a dopant incorporated into the substrate.

[0170] As an example, the second functional part 324 can be a cube, sphere, prism, frustum, cone, tetrahedron, hexahedron, etc., and this application does not limit it.

[0171] In some examples, the optical properties of the first functional part 322 and the second functional part 324 are different. For example, the refractive index of the first functional part 322 is different from that of the second functional part 324.

[0172] For example, the refractive index n1 of the first functional part 322 and the refractive index n2 of the second functional part 324 can satisfy: |n1-n2|>0.

[0173] As an implementation, n1 can satisfy: 1.5≤n1≤1.7; n2 can satisfy: 1.5≤n2≤1.7. n1 and n2 can be respectively: 1.55, 1.65, 1.60, 1.65, 1.65, 1.70, 1.65, 1.55, 1.65, 1.60, 1.70, 1.65, etc.

[0174] When the refractive index of the first functional part 322 is different from that of the second functional part 324, the light emitted by the display screen will be refracted when it passes through the interface between the first functional part 322 and the second functional part 324. The more content of the second functional part 324, the more times the light will be refracted. After the light enters the diffusion layer 320, it can exit from multiple angles, and the probability of the display screen flashing is lower.

[0175] To improve the bending resistance of the optical component 300, the mechanical properties of the diffusion layer 320 can meet certain requirements.

[0176] In some examples, the elastic modulus of the diffusion layer 320 can satisfy at least one of the following:

[0177] The elastic modulus E21 at room temperature (25℃) satisfies: 300MPa≤E21≤600MPa. For example, E21 can be 320MPa, 340MPa, 360MPa, 380MPa, 400MPa, 420MPa, 440MPa, 460MPa, 480MPa, etc.

[0178] The high-temperature (60℃) elastic modulus E22 satisfies: 30MPa≤E22≤60MPa. For example, E22 can be 32MPa, 34MPa, 36MPa, 38MPa, 40MPa, 42MPa, 44MPa, 46MPa, 48MPa, etc.

[0179] The low-temperature (-20℃) elastic modulus E23 satisfies: 1.3GPa≤E23≤1.6GPa. For example, E23 can be 1.32GPa, 1.34GPa, 1.36GPa, 1.38GPa, 1.40GPa, 1.42GPa, 1.44GPa, 1.46GPa, 1.48GPa, etc.

[0180] In some examples, the elongation at break of the diffusion layer 320 can satisfy at least one of the following:

[0181] The elongation at break at room temperature ε21 satisfies the following condition: 35% ≤ ε21 ≤ 40%. For example, ε21 can be 36%, 37%, 38%, 39%, etc.

[0182] The low-temperature elongation at break ε22 satisfies the following condition: 1.5% ≤ ε22 ≤ 2%. For example, ε22 can be 1.6%, 1.7%, 1.8%, 1.9%, etc.

[0183] For the diffusion layer 320 including the first functional part 322 and the second functional part 324, the performance of the first functional part 322 and the second functional part 324 can also meet the above performance requirements.

[0184] In some examples, the elastic modulus of the first functional part 322 can satisfy at least one of the following:

[0185] The elastic modulus E21a at room temperature (25℃) satisfies: 300MPa≤E21a≤600MPa. For example, E21a can be 320MPa, 340MPa, 360MPa, 380MPa, 400MPa, 420MPa, 440MPa, 460MPa, 480MPa, etc.

[0186] The high-temperature (60℃) elastic modulus E22a satisfies: 30MPa≤E22a≤60MPa. For example, E22a can be 32MPa, 34MPa, 36MPa, 38MPa, 40MPa, 42MPa, 44MPa, 46MPa, 48MPa, etc.

[0187] The low-temperature (-20℃) elastic modulus E23a satisfies: 1.3GPa≤E23a≤1.6GPa. For example, E23a can take values ​​such as 1.32GPa, 1.34GPa, 1.36GPa, 1.38GPa, 1.40GPa, 1.42GPa, 1.44GPa, 1.46GPa, and 1.48GPa.

[0188] In some examples, the elongation at break of the first functional part 322 can satisfy at least one of the following:

[0189] The elongation at break at room temperature ε21a satisfies the following condition: 35% ≤ ε21a ≤ 40%. For example, ε21a can be 36%, 37%, 38%, 39%, etc.

[0190] The low-temperature elongation at break ε22a satisfies the following condition: 1.5% ≤ ε22a ≤ 2%. For example, ε22a can be 1.6%, 1.7%, 1.8%, 1.9%, etc.

[0191] Similarly, the elastic modulus of the second functional part 324 can also satisfy at least one of the following:

[0192] The elastic modulus E21b at room temperature (25℃) satisfies: 300MPa≤E21b≤600MPa. For example, E21b can be 320MPa, 340MPa, 360MPa, 380MPa, 400MPa, 420MPa, 440MPa, 460MPa, 480MPa, etc.

[0193] The high-temperature (60℃) elastic modulus E22b satisfies: 30MPa≤E22b≤60MPa. For example, E22b can be 32MPa, 34MPa, 36MPa, 38MPa, 40MPa, 42MPa, 44MPa, 46MPa, 48MPa, etc.

[0194] The low-temperature (-20℃) elastic modulus E23b satisfies: 1.3GPa≤E23b≤1.6GPa. For example, E23b can take values ​​such as 1.32GPa, 1.34GPa, 1.36GPa, 1.38GPa, 1.40GPa, 1.42GPa, 1.44GPa, 1.46GPa, and 1.48GPa.

[0195] The elongation at break of the second functional part 324 can also satisfy at least one of the following:

[0196] The elongation at break at room temperature ε21b satisfies the following condition: 35% ≤ ε21b ≤ 40%. For example, ε21b can be 36%, 37%, 38%, 39%, etc.

[0197] The low-temperature elongation at break ε22b satisfies: 1.5% ≤ ε22b ≤ 2%. For example, ε22b can be 1.6%, 1.7%, 1.8%, 1.9%, etc.

[0198] As an implementation, the elastic modulus of the first functional part 322 and the elastic modulus of the second functional part 324 may be the same or different, and the elongation at break of the first functional part 322 and the elongation at break of the second functional part 324 may also be the same or different. This application does not impose any restrictions on this.

[0199] As a result, the first functional part 322 and / or the second functional part 324 may be composed of polymer materials, and the constituent materials of the first functional part 322 and the second functional part 324 may be different. For example, the first functional part 322 and the second functional part 324 may be composed of two different methacrylates, or the first functional part 322 and the second functional part 324 may be composed of two different carbonates, or the first functional part 322 and the second functional part 324 may be composed of two different polyethylene terephthalate.

[0200] In bending scenarios, the deformation of the diffusion layer 320 is also related to the thickness of the diffusion layer 320. Therefore, in order to improve the bending resistance of the optical component 300, the thickness of the diffusion layer 320 can meet certain requirements.

[0201] In some examples, the thickness B0 of the diffusion layer 320 can satisfy: 30um ≤ B0 ≤ 60um. For example, B0 can be 32um, 35um, 38um, 40um, 42um, 45um, 48um, 50um, 52um, 55um, 58um, etc.

[0202] The shape, position, and distribution of the second functional part 324 within the diffusion layer 320 also affect the bending resistance of the diffusion layer 320.

[0203] In some examples, the second functional part 324 can be a column-shaped, rod-shaped, platform-shaped, or bar-shaped structure. The second functional part 324 can extend along a characteristic direction, and the second functional part 324 has a longer dimension in this characteristic direction. For example, this characteristic direction can be the axial direction of a column, rod, platform, bar, or other structure.

[0204] In some examples, the characteristic direction of the second functional unit 324 can form an angle β with the thickness direction of the diffusion layer 320, where β can satisfy: -5°≤β≤5°. For example, β can be -4°, -3°, -2°, 0°, 2°, 3°, 4°, etc. When β is 0°, the second functional unit 324 extends approximately along the thickness direction of the diffusion layer 320.

[0205] In some examples, the distance between the end faces of the second functional unit 324 and the adjacent surface of the diffusion layer 320 can meet certain requirements.

[0206] For example, the thickness of the diffusion layer 320 can be B0, and the distance between the end face of the second functional part 324 and the adjacent surface of the diffusion layer 320 can be ΔB. ΔB and B0 can satisfy: 0≤ΔB / B0≤5%. For example, ΔB can be 1%×B0, 2%×B0, 3%×B0, 4%×B0, etc.

[0207] As an example, Figure 11 shows a schematic diagram of the position of the second functional unit 324-1 in the diffusion layer 320. The distance between the end face of one end of the second functional unit 324-1 and the adjacent surface of the diffusion layer 320 is ΔB1, the thickness of the diffusion layer 320 is B0, and ΔB1 / B0 is approximately 0.8%. The angle between the characteristic direction of the second functional unit 324-1 and the thickness direction of the diffusion layer 320 is β1, and β1 is approximately 2°.

[0208] As one implementation, the height of the second functional part 324 can be equal to the thickness of the diffusion layer 320, or in other words, the end faces of the two ends of the second functional part 324 are located on two opposite surfaces of the diffusion layer 320. In this scenario, the second functional part 324 can also be referred to as a through structure, that is, the second functional part 324 passes through the diffusion layer 320 from one side of the diffusion layer 320 and extends to the other side of the diffusion layer 320.

[0209] One possibility is that the multiple second functional parts 324 in the diffusion layer 320 are all of the above-mentioned through-type structure, and the extension directions of the multiple second functional parts 324 are basically parallel.

[0210] When the height of the second functional part 324 is equal to the thickness of the diffusion layer 320, in a bending scenario, the first functional part 322 and the second functional part 324 in the diffusion layer 320 can deform synchronously and jointly bear the external force. This helps to reduce the probability of the first functional part 322 and the second functional part 324 separating due to stress concentration, which helps to improve the bending reliability of the diffusion layer 320 and improve the bending resistance of the optical component 300.

[0211] The number of second functional parts 324 contained in the diffusion layer 320 also affects the bending resistance of the diffusion layer 320 to some extent.

[0212] In some examples, using a reference plane perpendicular to the thickness direction of the diffusion layer 320 as a reference, the content N of the second functional part 324 can satisfy: N≥100 / mm 2 For example, N1 can be 120 pieces / mm. 2 150 pieces / mm 2 180 pieces / mm 2 200 pieces / mm 2 300 pieces / mm 2 400 pieces / mm 2 500 pieces / mm 2 wait.

[0213] As an exemplary embodiment, the first functional portion 322 and the second functional portion 324 of the diffusion layer 320 are each composed of two different types of methacrylate, and the second functional portion 324 has a through-type structure, with its extension direction roughly along the thickness direction of the diffusion layer 320. Multiple second functional portions 324 are randomly distributed within the diffusion layer 320. This allows light incident on the diffusion layer 320 to undergo more refractions, improving the uniformity of the light. Furthermore, the first functional portion 322 and the second functional portion 324 in the diffusion layer 320 can deform synchronously, resulting in better bending resistance of the diffusion layer 320. Further, the thickness of the diffusion layer 320 in this embodiment can be less than or equal to 30 micrometers. This reduces the deformation of the diffusion layer 320 in the thickness direction during bending, lowers the probability of separation between the first functional portion 322 and the second functional portion 324, and improves the bending reliability of the optical component 300.

[0214] As another exemplary embodiment, the diffusion layer 320 has an elastic modulus greater than or equal to 400 MPa and less than or equal to 500 MPa at 25°C, an elastic modulus greater than or equal to 40 MPa and less than or equal to 50 MPa at 60°C, and an elastic modulus greater than or equal to 1.4 GPa and less than or equal to 1.5 GPa at -20°C; the elongation at break of the diffusion layer 320 at 25°C is greater than or equal to 35% and less than or equal to 40%, and the elongation at break at -20°C is greater than or equal to 1.5% and less than or equal to 2%. Thus, the diffusion layer 320 exhibits good bending resistance in various application scenarios (high-temperature scenarios, low-temperature scenarios, etc.). Correspondingly, the light uniformity of the optical component 300 is relatively stable in different application scenarios, and the foldable electronic device containing this optical component 300 shows good display performance in different application scenarios.

[0215] As another exemplary embodiment, the thickness of the anti-glare layer 310 can be around 54 micrometers, and the thickness of the diffusion layer 320 can be greater than or equal to 30 micrometers and less than or equal to 60 micrometers. Based on this, the elastic modulus of the anti-glare layer 310 at room temperature is greater than or equal to 2 GPa, and the elongation at break at room temperature is greater than or equal to 4%. The elastic modulus of the diffusion layer 320 at 25°C is greater than or equal to 400 MPa and less than or equal to 500 MPa, at 60°C it is greater than or equal to 40 MPa and less than or equal to 50 MPa, and at -20°C it is greater than or equal to 1.4 GPa and less than or equal to 1.5 GPa. Thus, during bending, the anti-glare layer 310 and the diffusion layer 320 can deform approximately synchronously. During deformation, the influence of the anti-glare layer 310 and the diffusion layer 320 on screen light can maintain a good matching relationship, and the display effect of the display module using the optical component 300 can be maintained at a high level. In some examples, the first adhesive layer 315 used to connect the diffusion layer 320 and the anti-glare layer 310 may be composed of an adhesive material that has good optical transparency, adhesive strength, and elastic deformation capability. For example, one or more of optically transparent adhesives, epoxy resin adhesives, silicone adhesives, polyurethane adhesives, etc.

[0216] In order to improve the bonding strength between the anti-glare layer 310 and the diffusion layer 320, and to control the thickness of the optical component 300 as much as possible, reduce the deformation of the first adhesive layer 315 under bending scenarios, and improve the structural stability of the optical component 300, the thickness of the first adhesive layer 315 can meet certain requirements.

[0217] For example, the thickness d31 of the first adhesive layer 315 can satisfy: 15um ≤ d31 ≤ 50um. For example, d31 can be 18um, 20um, 25um, 30um, 35um, 40um, 45um, etc.

[0218] In some examples, to facilitate the assembly of the optical component 300 with other display components, the optical component 300 may also include a second adhesive layer 325, which may be located on the side of the diffusion layer 320 opposite to the anti-glare layer 310, and the second adhesive layer 325 may be fixedly connected to the diffusion layer 320.

[0219] Similar to the first adhesive layer 315, the second adhesive layer 325 may also be composed of an adhesive material with good optical transparency, adhesive strength and elastic deformation ability, such as one or more of optically transparent adhesive, epoxy resin adhesive, silicone adhesive, polyurethane adhesive, etc.

[0220] To ensure a more secure connection between the optical component 300 and the display assembly, the thickness of the second adhesive layer 325 can meet certain requirements.

[0221] For example, the thickness d32 of the second adhesive layer 325 can satisfy: 15um ≤ d32 ≤ 50um. For example, d32 can be 18um, 20um, 25um, 30um, 35um, 40um, 45um, etc.

[0222] As an implementation, the thickness of the second adhesive layer 325 can be slightly greater than the thickness of the first adhesive layer 315; in other words, d32 can be greater than d31.

[0223] When the first adhesive layer 315 and the second adhesive layer 325 include optically transparent adhesive, the mechanical properties of the optically transparent adhesive can meet certain requirements.

[0224] For example, the creep recovery rate p of the optically transparent adhesive satisfies: p ≥ 80%. For example, p can be 85%, 90%, 92%, 94%, 96%, 98%, etc.

[0225] For example, the elastic modulus of the optically transparent adhesive can satisfy at least one of the following:

[0226] The elastic modulus E41 at -20℃ satisfies: E41≤400KPa. For example, E41 can be 380KPa, 360KPa, 340KPa, 320KPa, 300KPa, 250KPa, 200KPa, 100KPa, etc.

[0227] The elastic modulus E42 at 25℃ satisfies: 30KPa≤E42≤50KPa. For example, E42 can be 32KPa, 34KPa, 36KPa, 38KPa, 40KPa, 42KPa, 44KPa, 46KPa, 48KPa, etc.

[0228] The elastic modulus E43 at 60℃ satisfies: 10KPa≤E42≤30KPa. For example, E43 can be 12KPa, 14KPa, 16KPa, 18KPa, 20KPa, 22KPa, 24KPa, 26KPa, 28KPa, etc.

[0229] The elastic modulus E44 at 80℃ satisfies: 5KPa≤E42≤25KPa. For example, E44 can be 6KPa, 7KPa, 8KPa, 9KPa, 10KPa, 11KPa, 13KPa, 15KPa, 17KPa, 19KPa, 21KPa, 23KPa, etc.

[0230] In bending scenarios, different parts of the optical component 300 experience varying degrees of force. Therefore, the bending resistance of different parts of the optical component 300 can be designed differently. Specifically, parts subjected to higher bending stress during bending can exhibit stronger bending resistance, while parts subjected to lower bending stress can exhibit weaker bending resistance.

[0231] As an exemplary embodiment, both the first adhesive layer 315 and the second adhesive layer 325 are composed of optically transparent adhesive. The thickness of the first adhesive layer 315 is approximately 15 micrometers, and the thickness of the second adhesive layer 325 is approximately 25 micrometers. Furthermore, the elastic modulus of both the first adhesive layer 315 and the second adhesive layer 325 at 25°C is greater than or equal to 35 kPa and less than or equal to 45 kPa, at 60°C it is greater than or equal to 15 kPa and less than or equal to 25 kPa, and at -20°C it is less than or equal to 300 kPa. In this way, during the bending process, the first adhesive layer 315 and the second adhesive layer 325 can deform approximately synchronously. The deformation of the thinner first adhesive layer 315 is comparable to that of the thicker second adhesive layer 325. Delamination is less likely to occur between the anti-glare layer 310 and the diffusion layer 320. Delamination is also less likely to occur between the optical component 300 and other display components. The bending reliability of the optical component 300 is better, and the bending resistance of the display module containing the optical component 300 is also better.

[0232] As another exemplary embodiment, the thickness of the anti-glare layer 310 can be around 54 micrometers, the thickness of the diffusion layer 320 can be greater than or equal to 30 micrometers and less than or equal to 60 micrometers, and the thickness of the first adhesive layer 315 can be around 15 micrometers. Based on this, the elastic modulus of the anti-glare layer 310 at room temperature is greater than or equal to 2 GPa, and the elongation at break at room temperature is greater than or equal to 4%. The elastic modulus of the diffusion layer 320 at 25°C is greater than or equal to 400 MPa and less than or equal to 500 MPa, at 60°C it is greater than or equal to 40 MPa and less than or equal to 50 MPa, and at -20°C it is greater than or equal to 1.4 GPa and less than or equal to 1.5 GPa. The elastic modulus of the first adhesive layer 315 at 25°C is greater than or equal to 35 kPa and less than or equal to 45 kPa, at 60°C it is greater than or equal to 15 kPa and less than or equal to 25 kPa, and at -20°C it is less than or equal to 300 kPa. In this way, during the bending process, the anti-glare layer 310, the diffusion layer 320 and the first adhesive layer 315 can deform approximately synchronously, the probability of delamination between different functional layers is smaller, and the bending reliability of the optical component 300 is better.

[0233] Figure 12 shows a schematic diagram of an optical component 300 applied to the foldable electronic device 100 described above. The optical component 300 may include a sub-part 300-1 and a sub-part 300-2. The sub-part 300-1 may be close to the connecting mechanism 130 of the foldable electronic device 100, and the sub-part 300-2 may include two separate parts located on opposite sides of the sub-part 300-1. The sub-part 300-2 may be located away from the connecting mechanism 130.

[0234] Because sub-part 300-1 is closer to the connecting mechanism 130 and sub-part 300-2 is farther away from the connecting mechanism 130, during the bending process of the electronic device 100, sub-part 300-1 experiences a larger force, while sub-part 300-2 experiences a smaller force. In this case, sub-part 300-1 can be designed to have stronger bending resistance, while sub-part 300-2 can have weaker bending resistance.

[0235] In some examples, the elastic modulus E31 of sub-part 300-1 can be smaller, and the elongation at break ε31 can be larger; correspondingly, the elastic modulus E32 of sub-part 300-2 can be larger, and the elongation at break ε32 can be smaller. That is, E31 < E32, ε31 > ε32.

[0236] As one implementation, in the diffusion layer 320 of the optical component 300, the elastic modulus of the first functional portion 322 can be smaller than that of the second functional portion 324, and the elongation at break of the first functional portion 322 can be greater than that of the second functional portion 324. Based on this, the content of the second functional portion 324 in the diffusion layer 320 located in the sub-part 300-1 can be higher, and the content of the second functional portion 324 in the diffusion layer 320 located in the sub-part 300-2 can be lower.

[0237] For example, the dashed circles in Figure 12 can represent the second functional units 324 within the optical component 300. The number of second functional units 324 located in sub-part 300-1 is greater than the number of second functional units 324 located in sub-part 300-2 per unit area.

[0238] As another implementation, the diffusion layer 320 of the optical component 300 may include two second functional parts 324 with different properties, such as second functional part 324a and second functional part 324b, wherein the second functional part 324a has a larger elastic modulus and a smaller elongation at break; and the second functional part 324b has a smaller elastic modulus and a larger elongation at break. Based on this, more second functional parts 324a may be located in the diffusion layer 320 within the sub-part 300-2, and more second functional parts 324b may be located in the diffusion layer 320 within the sub-part 300-1.

[0239] As another implementation, the diffusion layer 320 in sub-part 300-1 can be thinner, while the diffusion layer 320 in sub-part 300-2 can be thicker.

[0240] For example, Figure 13 shows a schematic diagram of an optical component 300 and an enlarged view of region A3 of the optical component 300 near sub-part 300-1. As shown in Figure 13, the diffusion layer 320 at sub-part 300-1 may include a recessed structure, the thickness of which is dm, and the thickness of the diffusion layer 320 at sub-part 300-2 is de, where dm is less than de.

[0241] Figure 14 shows another optical component 400 provided in the embodiments of this application. Compared with the optical component 200 or optical component 300 mentioned above, the optical component 400, in addition to including an anti-glare layer, may also include an anti-fingerprint (AF) layer and / or an anti-reflection (AR) layer.

[0242] In some examples, the optical component 400 may include an anti-glare layer 410 and an anti-reflection layer 430, wherein the anti-reflection layer 430 may be coated on the anti-glare layer 410, or the anti-reflection layer 430 and the anti-glare layer 410 may be stacked along the thickness direction of the optical component 400.

[0243] The anti-glare layer 410 can be used to reduce the probability of glare caused when ambient light strikes the optical component 400. The anti-glare layer 410 may include a substrate and a raised structure located on the substrate. For a description of the substrate and raised structure of the anti-glare layer 410, please refer to the previous descriptions related to the substrate 212 and the raised structure 214.

[0244] The anti-reflective layer 430 can be used to reduce the reflection of ambient light when it is incident on the optical component 400, improve the transmittance of light emitted from the display screen when it passes through the optical component 400, and enhance the display performance such as contrast and color performance.

[0245] As a result, the anti-reflective layer 430 may be composed of one or more of the following materials: silicon dioxide, titanium dioxide, fluorides such as magnesium fluoride, polymer materials, etc.

[0246] As an example, the particle size of the material that makes up the antireflective layer 430 can be at the nanometer level, and these material particles can be arranged in a variety of different ways, such as the arrangement of a biomimetic structure like a moth's eye.

[0247] As one implementation, the antireflective layer 430 can be processed by a wet coating process. In this example, the antireflective layer 430 can be a single-layer or multi-layer structure, with the thickness of each layer being approximately 10 nanometers to 200 nanometers, for example, 20 nanometers, 50 nanometers, 100 nanometers, 150 nanometers, etc.

[0248] When the antireflective layer 430 has a multilayer structure, the refractive index of each layer can be different. In other words, the antireflective layer 430 can include multiple functional layers with different refractive indices. For example, the antireflective layer 430 can include a low-refractive-index layer and a high-refractive-index layer, wherein the refractive index of the low-refractive-index layer is less than that of the high-refractive-index layer.

[0249] As an example, the low-refractive layer can be composed of polyurethane-acrylic resin or similar polymer materials, and doped with a certain proportion of metal oxides or non-metal oxides (such as silicon dioxide); similarly, the high-refractive layer can also be composed of polyurethane-acrylic resin or similar polymer materials, and doped with a certain proportion of metal oxides (such as zirconium dioxide) or non-metal oxides.

[0250] As another implementation, the anti-reflective layer 430 can be fabricated using a dry sputtering process. In this example, the anti-reflective layer 430 can be a multilayer structure (such as two layers, four layers, etc.), with each layer having a thickness of approximately 10 nanometers to 200 nanometers, for example, 20 nanometers, 50 nanometers, 100 nanometers, 150 nanometers, etc.

[0251] For example, the refractive indices of different functional layers in the antireflective layer 430 may be different. For instance, the antireflective layer 430 may include a low-refractive-index layer and a high-refractive-index layer, wherein the refractive index of the low-refractive-index layer is less than that of the high-refractive-index layer.

[0252] As an example, the low-refractive layer may include metal oxides or non-metal oxides (such as silicon dioxide); the high-refractive layer may include metal compounds or non-metal compounds (such as zirconium dioxide, silicon nitride, niobium oxide, etc.).

[0253] In some examples, the optical component 400 may include an anti-glare layer 410 and an anti-fingerprint layer 440, wherein the anti-fingerprint layer 440 may be coated on the anti-glare layer 410, or the anti-fingerprint layer 440 and the anti-glare layer 410 may be stacked along the thickness direction of the optical component 400.

[0254] When the optical component 400 includes both an anti-reflective layer 430 and an anti-fingerprint layer 440, the anti-reflective layer 430 can be coated on top of the anti-glare layer 410, and the anti-fingerprint layer 440 can be coated on top of the anti-reflective layer 430. Alternatively, the anti-fingerprint layer 440, the anti-reflective layer 430, and the anti-glare layer 410 can be stacked sequentially along the thickness direction of the optical component 400.

[0255] The anti-fingerprint layer 440 can be used to reduce the oil and dirt left by fingers when touching the screen, improve the wiping and cleaning ability of the optical components 400, and enhance the durability and lifespan of the optical components 400.

[0256] As a result, the anti-fingerprint layer 440 may be composed of one or more of the following materials: fluoropolymers (e.g., perfluoropolyethers), siloxane compounds, nanomaterials such as nano-silica, etc.

[0257] In some examples, the thickness of the anti-fingerprint layer 440 can be greater than or equal to 5 nanometers and less than or equal to 30 nanometers. For example, 7 nanometers, 9 nanometers, 10 nanometers, 15 nanometers, 20 nanometers, 25 nanometers, etc.

[0258] In some examples, the optical component 400 may also include a diffusion layer 420, which can be used to reduce the probability of flashes when light emitted from the display screen is incident on the optical component 300, thereby improving the display effect of the display screen.

[0259] For example, the diffusion layer 420 may be composed of various structures with different optical properties (e.g., refractive index), one of which may extend along the thickness direction of the optical component 400. Further information about the diffusion layer 420 can be found in the preceding section related to the diffusion layer 320.

[0260] Similarly, the optical component 400 may also include a first adhesive layer 415, which can be used to fix the anti-glare layer 410 and the diffusion layer 420 relative to each other. The optical component 400 may also include a second adhesive layer 425, which can be used to fix the optical component 400 relative to the display screen. For more information about the first adhesive layer 415 and the second adhesive layer 425, please refer to the related content on the first adhesive layer 315 and the second adhesive layer 325 above.

[0261] In order to improve the overall bending resistance of the optical component 400, the mechanical properties of the optical component 400 can meet certain requirements.

[0262] In some examples, the overall elongation at break ε4 of the anti-glare layer 410, anti-reflection layer 430, and anti-fingerprint layer 440 can satisfy: ε4≥4.5%. For example, ε4 can be 5%, 8%, 10%, 15%, 20%, 30%, etc.

[0263] Figures 15 and 16 show another optical component 500 provided in the embodiments of this application. This optical component 500 includes an impact-resistant layer that can improve the impact resistance of the optical component. For ease of explanation, the optical component shown in Figure 15 is referred to as optical component 500a, and the optical component shown in Figure 16 is referred to as optical component 500b.

[0264] Referring to Figure 15, the optical component 500a may include an anti-glare layer 510, a diffusion layer 520, an anti-reflection layer 530, an anti-fingerprint layer 540, and an adhesive layer for connecting adjacent functional layers. For a description of these functional layers, please refer to the description of the optical component 400 above.

[0265] In some examples, the optical component 500a may also include an anti-glare layer 550, which may be located between the anti-glare layer 510 and the diffusion layer 520, or the anti-glare layer 510, the anti-glare layer 550 and the diffusion layer 520 may be stacked along the thickness direction of the optical component 500a.

[0266] As an example, the shock-resistant layer 550 may be composed of a non-Newtonian fluid material, such as a polymer (polyethylene, polypropylene, etc.) solution; or, the shock-resistant layer 550 may be composed of a rubber or silicone material.

[0267] As an example, the thickness d4 of the impact-resistant layer 550 can satisfy: 10 nm ≤ d4 ≤ 100 nm. For example, d4 can be 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 90 nm, etc.

[0268] The anti-shock layer 550 and the anti-glare layer 510 can be connected by an adhesive layer 515, and the anti-shock layer 550 and the diffusion layer 520 can be connected by an adhesive layer 555. In some examples, both the adhesive layer 515 and the adhesive layer 555 can be composed of optically transparent adhesive or the like.

[0269] Similar to optical component 500a, as shown in FIG16, optical component 500b may include an anti-glare layer 510, a diffusion layer 520, an anti-reflection layer 530, an anti-fingerprint layer 540, and an anti-smash layer 550.

[0270] In some examples, the material that makes up the shockproof layer 550 may have a certain adhesive ability. In this case, no additional adhesive material may be provided between the shockproof layer 550 and the diffusion layer 520 in the optical component 500b, thereby achieving the thinning of the optical component.

[0271] Based on the aforementioned optical components, this application embodiment also provides a display module that is bendable. The display module may include any one of the aforementioned optical components 200, 300, or 400. The display module may also include a display panel, with the optical components covering the display panel.

[0272] For more information about this display module, please refer to the previous section on flexible screen 110.

[0273] This application also provides a foldable electronic device, which may include the above-mentioned display module and housing, with the display module and housing fixedly connected.

[0274] For more information about this foldable electronic device, please refer to the previous section on foldable electronic device 100.

[0275] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An optical component, characterized in that, The optical component is bendable and includes a film substrate and a plurality of protrusions distributed on the film substrate. The film substrate is composed of polymer material or glass. The height difference between the tallest protrusion and the shortest protrusion among the plurality of protrusions is greater than or equal to 0.2 micrometers and less than or equal to 2 micrometers.

2. The optical component according to claim 1, characterized in that, The protrusion structure does not include doped particles; or, the protrusion structure includes doped particles and the particle size of the doped particles is less than or equal to 780 nanometers.

3. The optical component according to claim 1 or 2, characterized in that, The height of the protrusion is less than or equal to 2 micrometers, and / or the maximum size of the protrusion in the reference plane is greater than or equal to 10 micrometers and less than or equal to 50 micrometers; The reference plane is perpendicular to the thickness direction of the optical component.

4. The optical component according to any one of claims 1 to 3, characterized in that, The elastic modulus of the optical component is greater than or equal to 2 GPa, and / or the elongation at break of the optical component is greater than or equal to 4%.

5. The optical component according to any one of claims 1 to 4, characterized in that, The membrane substrate comprises colorless polyimide or ultrathin glass.

6. The optical component according to any one of claims 1 to 5, characterized in that, The optical component further includes an anti-reflective layer and an anti-fingerprint layer, wherein the anti-reflective layer covers the raised structure and the anti-fingerprint layer covers the anti-reflective layer.

7. The optical component according to claim 6, characterized in that, The elongation at break of the optical component is greater than or equal to 4.5%.

8. An optical component, characterized in that, The optical component is bendable and includes an anti-glare layer and a diffusion layer, which are stacked along the thickness direction of the optical component. The anti-glare layer includes a membrane substrate and a plurality of protrusions distributed on the membrane substrate; The diffusion layer is located on the side of the anti-glare layer opposite to the protruding structure. The diffusion layer includes a first functional part and a second functional part, and the refractive index of the first functional part and the refractive index of the second functional part are different.

9. The optical component according to claim 8, characterized in that, The height difference between the tallest protrusion and the shortest protrusion among the plurality of protrusions is greater than or equal to 0.2 micrometers and less than or equal to 2 micrometers.

10. The optical component according to claim 8 or 9, characterized in that, The protrusion structure does not contain doped particles, or the protrusion structure includes doped particles with a particle size of less than or equal to 780 nanometers.

11. The optical component according to any one of claims 8 to 10, characterized in that, The height of the protrusion is less than or equal to 2 micrometers, and / or the maximum size of the protrusion in the reference plane is greater than or equal to 10 micrometers and less than or equal to 50 micrometers; The reference plane is perpendicular to the thickness direction of the optical component.

12. The optical component according to any one of claims 8 to 11, characterized in that, The elastic modulus of the anti-glare layer is greater than or equal to 2 GPa, and / or the elongation at break of the anti-glare layer is greater than or equal to 4%.

13. The optical component according to any one of claims 8 to 12, characterized in that, The optical component further includes an anti-reflective layer and an anti-fingerprint layer, wherein the anti-reflective layer covers the raised structure and the anti-fingerprint layer covers the anti-reflective layer.

14. The optical component according to claim 13, characterized in that, The elongation at break of the composite layered structure of the anti-glare layer, the anti-reflective layer, and the anti-fingerprint layer is greater than or equal to 4.5%.

15. The optical component according to any one of claims 8 to 14, characterized in that, The second functional part extends along the thickness direction of the optical component, the first functional part wraps around the outer periphery of the second functional part, and the height of the second functional part is equal to the thickness of the diffusion layer.

16. The optical component according to any one of claims 8 to 15, characterized in that, The diffusion layer satisfies at least one of the following: The elastic modulus at 25℃ is greater than or equal to 300MPa and less than or equal to 600MPa; The elastic modulus at 60℃ is greater than or equal to 30MPa and less than or equal to 60MPa; The elastic modulus at -20℃ is greater than or equal to 1.3 GPa and less than or equal to 1.6 GPa. The elongation at break at 25℃ is greater than or equal to 35% and less than or equal to 40%. The elongation at break at -20℃ is greater than or equal to 1.5% and less than or equal to 2%. The thickness is greater than or equal to 30 micrometers and less than or equal to 60 micrometers.

17. The optical component according to any one of claims 8 to 16, characterized in that, The optical component further includes a first adhesive layer located between the anti-glare layer and the diffusion layer, the thickness of the first adhesive layer being greater than or equal to 15 micrometers and less than or equal to 50 micrometers.

18. The optical component according to claim 17, characterized in that, The optical component further includes a second adhesive layer located on the side of the diffusion layer opposite to the anti-glare layer. The thickness of the second adhesive layer is greater than or equal to 15 micrometers and less than or equal to 50 micrometers, and the thickness of the second adhesive layer is greater than the thickness of the first adhesive layer.

19. The optical component according to claim 17 or 18, characterized in that, The first adhesive layer includes an optically transparent adhesive, which satisfies at least one of the following: Creep recovery rate greater than or equal to 80%; The elastic modulus at -20℃ is less than or equal to 400 kPa; The elastic modulus at 25℃ is greater than or equal to 30 kPa and less than or equal to 50 kPa. The elastic modulus at 60℃ is greater than or equal to 10 kPa and less than or equal to 30 kPa; The elastic modulus at 80℃ is greater than or equal to 5 kPa and less than or equal to 25 kPa.

20. A display module, characterized in that, It includes a display panel and an optical component as described in any one of claims 1 to 19, wherein the optical component is located on the light-emitting side of the display panel and is stacked with the display panel in the light-emitting direction.

21. A foldable electronic device, characterized in that, It includes a housing and a display module as described in claim 20, wherein the display module is fixedly connected to the housing.

Images