View control device, display device and electronic rearview mirror

Abstract

This utility model discloses a viewing angle control device, a display device, and an electronic rearview mirror. The viewing angle control device includes: a support layer; multiple flexible light-guiding magnetic structures, wherein a first end of each flexible light-guiding magnetic structure is fixed to one side of the support layer, and a second end of each flexible light-guiding magnetic structure is located on the side away from the support layer along a first direction, and the flexible light-guiding magnetic structure is used to guide light incident on it; wherein the first direction is perpendicular to the support layer; and an electromagnetic conversion module, which generates a magnetic field to control the position of the second end of each flexible light-guiding magnetic structure. This utility model can solve the problem of the viewing angle of the viewing angle control device being unable to be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a viewing angle control device, a display device, and an electronic rearview mirror. Background Technology

[0002] In-vehicle electronic side mirrors, as an alternative to traditional physical rearview mirrors, significantly reduce blind spots and improve visibility in low-visibility conditions such as at night and in rain or fog, through wide-angle cameras and image processing technology. To accommodate driver habits, in-vehicle electronic side mirrors are typically positioned near the A-pillar or B-pillar of the vehicle, with the display at a certain angle to the driver. To ensure the driver can clearly see the display image, the brightness at this viewing angle needs to be greater than 850 nits.

[0003] In related technologies, adding a viewing diaphragm to the display changes the polarization angle, allowing the driver to see the screen clearly. However, the optimal viewing angle differs for drivers of different heights, and the fixed viewing angle of the diaphragm in these technologies cannot accommodate diverse user groups. Utility Model Content

[0004] This invention provides a viewing angle control device, a display device, and an electronic rearview mirror to solve the problem that the viewing angle of the viewing angle control device cannot be adjusted.

[0005] According to one aspect of the present invention, a viewing angle control device is provided, the viewing angle control device comprising:

[0006] Support layer;

[0007] Multiple flexible light-guiding magnetic structures are provided, wherein a first end of each flexible light-guiding magnetic structure is fixed to one side of the support layer, and a second end of each flexible light-guiding magnetic structure is located on the side of its first end away from the support layer along a first direction. The flexible light-guiding magnetic structure is used to guide light incident on the flexible light-guiding magnetic structure; wherein the first direction is perpendicular to the support layer.

[0008] An electromagnetic conversion module is used to generate a magnetic field to control the position of the second end of the flexible light-guiding magnetic structure.

[0009] Optionally, the electromagnetic conversion module includes at least one first electrode, at least one second electrode, and at least one first electromagnetic conversion unit;

[0010] Along the second direction, the first electrode and the second electrode are disposed on both sides of at least part of the flexible light-guiding magnetic structure, the first electromagnetic conversion unit is disposed between the first electrode and the second electrode, the first end of the first electromagnetic conversion unit is electrically connected to the first electrode, and the second end of the first electromagnetic conversion unit is electrically connected to the second electrode; the second direction intersects the first direction.

[0011] Optionally, the first electromagnetic conversion unit is disposed between the first electrode and the corresponding second electrode, and between any two adjacent flexible light-guiding magnetic structures along the second direction.

[0012] Optionally, the flexible light-guiding magnetic structure includes a flexible light-guiding magnetic pillar and a first reflective layer. The first end of the flexible light-guiding magnetic pillar is fixedly connected to the support layer. The first reflective layer covers the side of the flexible light-guiding magnetic pillar and exposes the second end of the flexible light-guiding magnetic pillar.

[0013] The viewing angle control device further includes a second reflective layer, which covers the support layer and is in contact with the first reflective layer.

[0014] Optionally, in the initial state of the flexible light-guiding magnetic structure, the plane where the second end of the flexible light-guiding magnetic structure is located intersects with the plane where the first end of the flexible light-guiding magnetic structure is located.

[0015] Optionally, the first electromagnetic conversion unit is fixed to the support layer, and the connection line between the first electromagnetic conversion unit and the first electrode is located on the surface of the support layer or within the support layer; and / or,

[0016] The connection line between the first electromagnetic conversion unit and the second electrode is located on the surface of the support layer or within the support layer.

[0017] Optionally, the electromagnetic conversion module includes a second electromagnetic conversion unit, which is located on the side of the plurality of flexible light-guiding magnetic structures away from the support layer along the first direction;

[0018] And / or, the electromagnetic conversion module includes a third electromagnetic conversion unit located on the side of the support layer away from the plurality of flexible light-guiding magnetic structures.

[0019] Optionally, the flexible light-guiding magnetic structure includes a flexible light-guiding magnetic pillar and a third reflective layer covering the flexible light-guiding magnetic pillar, wherein the third reflective layer exposes the portion of the support layer other than where the flexible light-guiding magnetic structure is disposed.

[0020] According to another aspect of the present invention, a display device is provided, the display device including a display panel and a viewing angle control device as described above, the viewing angle control device being disposed on one side of the display panel.

[0021] According to another aspect of the present invention, an electronic rearview mirror is provided, the electronic rearview mirror including the display device as described above.

[0022] The technical solution of this embodiment of the invention employs a viewing angle control device comprising a support layer, multiple flexible light-guiding magnetic structures, and an electromagnetic conversion module. A first end of each flexible light-guiding magnetic structure is fixed to one side of the support layer. Along a first direction, a second end of the flexible light-guiding magnetic structure is located on the side of its first end away from the support layer. The flexible light-guiding magnetic structure guides light incident upon it; the first direction is perpendicular to the support layer. The electromagnetic conversion module generates a magnetic field to control the position of the second end of the flexible light-guiding magnetic structure. By using the flexible light-guiding magnetic structure to guide light, and adjusting the magnetic field generated by the electromagnetic conversion module to adjust the angle between the flexible light-guiding magnetic structure and the support layer, the emission direction of the light guided by the flexible light-guiding magnetic structure is changed, thereby achieving viewing angle control.

[0023] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of a viewing angle control device provided in an embodiment of this utility model;

[0026] Figure 2 A schematic diagram illustrating the principle of a viewing angle control device for controlling viewing angles, provided in an embodiment of this utility model;

[0027] Figure 3 A three-dimensional structural diagram of a perspective control device provided for an embodiment of this utility model;

[0028] Figure 4 A schematic diagram of another perspective control device provided in an embodiment of this utility model;

[0029] Figure 5A schematic diagram illustrating the principle of another viewing angle control device provided in this embodiment of the utility model for controlling the viewing angle;

[0030] Figure 6 This is a schematic diagram of the structure of a display device provided in an embodiment of the present utility model. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] Figure 1 This is a schematic diagram of the structure of a viewing angle control device provided in an embodiment of the present invention, with reference to... Figure 1 The viewing angle control device includes a support layer 11, multiple flexible light-guiding magnetic structures 71, and an electromagnetic conversion module 13. A first end of each flexible light-guiding magnetic structure 71 is fixed to one side of the support layer 11 along a first direction X. A second end of each flexible light-guiding magnetic structure 71 is located on the side of its first end away from the support layer 11. The flexible light-guiding magnetic structure 71 is used to guide light incident upon it; wherein the first direction X is perpendicular to the support layer 11. The electromagnetic conversion module 13 is used to generate a magnetic field to control the position of the second end of the flexible light-guiding magnetic structure 71.

[0034] Specifically, viewing angle control devices can be applied to display devices to control the primary light emission direction of the display device, thereby controlling the optimal viewing angle. It should be noted that before viewing angle control is applied, the primary light emission direction of the display device is perpendicular to the device itself, that is, the direction of light emitted directly from the light-emitting units. By using a viewing angle control device, the direction of the light emitted directly from the light-emitting units can be adjusted, thus changing the optimal viewing angle of the display device.

[0035] The support layer 11 is used to provide support and fix the first end of the flexible light-guiding magnetic structure 71. The support layer 11 has a light-transmitting function, such as... Figure 1 As shown, Figure 1 The incident light is indicated by a green dashed line with an arrow, entering from the side of the support layer 11 away from the flexible light-guiding magnetic structure 71. The flexible light-guiding magnetic structure 71 is flexible and magnetic, and functions to guide light. It can deform under the influence of a magnetic field, thus changing the deflection angle of the incident light. Specifically, when the electromagnetic conversion module 13 is powered on, it generates a corresponding magnetic field based on the electrical signal. Because the flexible light-guiding magnetic structure 71 is magnetic, it deforms under the influence of the magnetic field. Since the first end of the flexible light-guiding magnetic structure 71 is fixed while the second end is not, the second end will displace along the direction of the electric field, changing the relative position between the second and first ends, and thus changing the angle between the flexible light-guiding magnetic structure 71 and the support layer 11. When the angle between the flexible light-guiding magnetic structure 71 and the support layer 11 changes, the deflection angle of the light incident on the flexible light-guiding magnetic structure 71 along the first direction X also changes, thereby controlling the viewing angle. It is understandable that when the electrical signal provided to the electromagnetic conversion module 13 is different, the magnetic field generated will also be different, the magnetic force on the flexible light-guiding magnetic structure 71 will also be different, and the position where the second end of the flexible light-guiding magnetic structure 71 finally reaches the force balance will be different. That is, the final position of the second end of the flexible light-guiding magnetic structure 71 will be different. Thus, the viewing angle of the viewing angle control device can be controlled by controlling the magnitude of the electrical signal or the duty cycle.

[0036] The technical solution of this embodiment employs a viewing angle control device including a support layer 11, multiple flexible light-guiding magnetic structures 71, and an electromagnetic conversion module 13. The first end of each flexible light-guiding magnetic structure 71 is fixed to one side of the support layer 11 along a first direction X. The second end of each flexible light-guiding magnetic structure 71 is located on the side of its first end away from the support layer 11. The flexible light-guiding magnetic structure 71 is used to guide light incident upon it; wherein, the first direction X is perpendicular to the support layer 11. The electromagnetic conversion module 13 generates a magnetic field to control the position of the second end of the flexible light-guiding magnetic structure 71. By setting the flexible light-guiding magnetic structure 71 to guide light, and adjusting the magnetic field generated by the electromagnetic conversion module 13 to adjust the angle between the flexible light-guiding magnetic structure 71 and the support layer 11, the emission direction of the light guided by the flexible light-guiding magnetic structure 71 is changed, thereby achieving viewing angle control.

[0037] Optionally, in some embodiments, the flexible light-guiding magnetic structure 71 undergoes elastic deformation under the magnetic field force generated by the electromagnetic conversion module 13. That is, when the magnetic field force disappears, the flexible light-guiding magnetic structure 71 returns to its initial state.

[0038] Optionally, in some embodiments, the flexible light-guiding magnetic structure 71 deforms under the magnetic field force generated by the electromagnetic conversion module 13. If the flexible light-guiding magnetic structure 71 cannot return to its initial state after the magnetic field force disappears, the electromagnetic conversion module 13 can generate a reverse magnetic field force to restore the flexible light-guiding magnetic structure 71 to its initial state.

[0039] Optionally, continue to refer to Figure 1 The electromagnetic conversion module 13 includes at least one first electrode 131, at least one second electrode 132, and at least one first electromagnetic conversion unit 133. Along the second direction Y, the first electrode 131 and the second electrode 132 are disposed on both sides of at least a portion of the flexible light-guiding magnetic structure 71, and the first electromagnetic conversion unit 133 is disposed between the first electrode 131 and the second electrode 132. The first end of the first electromagnetic conversion unit 133 is electrically connected to the first electrode 131, and the second end of the first electromagnetic conversion unit 133 is electrically connected to the second electrode 132. The second direction Y intersects with the first direction X.

[0040] Specifically, the electronic conversion module 13 may include at least one sub-module, each sub-module including a first electrode 131, a second electrode 132, and at least one first electromagnetic conversion unit 133. The electrodes of different sub-modules are independently controlled, that is, the viewing angle corresponding to each sub-module can be adjusted individually. By setting multiple sub-modules, independent control of the viewing angle at different positions of the display device can be achieved.

[0041] For each submodule, the first electrode 131 and the second electrode 132 are used to provide electrical signals, with one of the first electrode 131 and the second electrode 132 being the positive terminal and the other the negative terminal. For example, the first electrode 131 can be the positive terminal and the second electrode 132 the negative terminal; conversely, the first electrode 131 can be the negative terminal and the second electrode 132 the positive terminal. The first electromagnetic conversion unit 133 can be an electromagnet, which generates a magnetic field after being energized. It should be noted that the N and S poles of the first electromagnetic conversion unit 133 after being energized can be arranged along the second direction Y. Figure 2 As shown, Figure 2 This diagram illustrates the principle of a viewing angle control device according to an embodiment of the present invention. The magnetic field direction is shown by the red line with arrows. The flexible light-guiding magnetic structure 71 deforms under the influence of the magnetic field force, thereby controlling the viewing angle. When the electromagnetic conversion module 13 includes only one sub-module, the first electrode 131 and the second electrode 132 can be respectively disposed on both sides of the multiple flexible light-guiding magnetic structures along the second direction Y. The second direction Y can be understood as the direction in which the emitted light of the viewing angle control device needs to approach or move away. In this embodiment, all flexible light-guiding magnetic structures 71 are controlled synchronously.

[0042] When the electromagnetic conversion module 13 includes at least two sub-modules, multiple sub-modules can be set in the second direction Y to achieve local viewing angle control. Multiple sub-modules can also be set in the third direction Z to achieve local viewing angle control. The first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0043] Optionally, such as Figure 3 As shown, Figure 3 This is a three-dimensional structural diagram of a viewing angle control device provided in an embodiment of the present invention. In some embodiments, the first electrode 131 can be arranged along the third direction Z, and the orthogonal projection of the flexible light-guiding magnetic structure 71 along the second direction Y is located on the first electrode 131. The second electrode 132 can also be arranged along the third direction Z, and the orthogonal projection of the flexible light-guiding magnetic structure 71 along the second direction Z is located on the second electrode 132. The first electrode 131 can be ITO (indium tin oxide), and the second electrode 132 can also be ITO. In this embodiment, the distance between the first electromagnetic conversion unit and the electrode is relatively short, simplifying the wiring difficulty. Further optionally, only one first electromagnetic conversion unit 133 can be provided.

[0044] Optionally, such as Figures 1 to 3 As shown, a first electromagnetic conversion unit 133 is disposed between any two adjacent flexible optical guiding magnetic structures located between the first electrode 131 and the corresponding second electrode 132 along the second direction Y. Figure 3 The first electromagnetic conversion unit 133 is not shown.

[0045] Specifically, multiple flexible light-guiding magnetic structures 71 are arranged in an array along the third direction Z and the second direction Y. That is, at least two flexible light-guiding magnetic structures 71 are located in a straight line along the third direction Z. If the third direction Z is defined as the column direction, a first electromagnetic conversion unit 133 is provided between each two adjacent columns of flexible light-guiding magnetic structures 71. One or more first electromagnetic conversion units 133 can be provided between two adjacent columns of flexible light-guiding magnetic structures 71. For example, along the third direction Z, the number of first electromagnetic conversion units 133 in a column is the same as the number of flexible light-guiding magnetic structures 71 in a column. One first electromagnetic conversion unit 133 is provided between each two adjacent flexible light-guiding magnetic structures 71. This arrangement ensures that the direction and magnitude of the magnetic field force experienced by the multiple flexible light-guiding magnetic structures 71 corresponding to each submodule are basically consistent, thereby ensuring the consistency of control over different viewing angles by different flexible light-guiding magnetic structures.

[0046] Optionally, the first electromagnetic conversion unit 133 can be an electromagnet, a planar helical coil, or a three-dimensional coil, etc.

[0047] Optionally, in some embodiments, the electromagnetic conversion module may not have a first electrode and a second electrode, but only an electromagnet. The electromagnet may be a planar helical coil disposed on a first side and / or a second side of a plurality of flexible light-guiding magnetic structures 71 along the second direction Y.

[0048] Optionally, continue to refer to Figure 1 and Figure 2 The flexible light-guiding magnetic structure 71 includes a flexible light-guiding magnetic column 12 and a first reflective layer 15. The first end of the flexible light-guiding magnetic column 12 is fixedly connected to the support layer 11. The first reflective layer 15 covers the side of the flexible light-guiding magnetic column 12 and exposes the second end of the flexible light-guiding magnetic column 12. The viewing angle control device also includes a second reflective layer 16, which covers the support layer 11 and is connected to the first reflective layer 15.

[0049] Specifically, in this embodiment, the second end of the flexible light-guiding magnetic pillar 12 is the light-emitting position, and the portion of the support layer 11 other than where the flexible light-guiding magnetic pillar 12 is located is covered by the second reflective layer 16 and cannot emit light. The flexible light-guiding magnetic pillar 12 constitutes the main shape of the flexible light-guiding magnetic structure 71. It can be considered that the first end of the flexible light-guiding magnetic pillar 12 is the first end of the flexible light-guiding magnetic structure 71, and the second end of the flexible light-guiding magnetic pillar 12 is the second end of the flexible light-guiding magnetic structure 71. The first reflective layer 15 can be understood as being formed by depositing a reflective material on the surface of the flexible light-guiding magnetic pillar 12. For example... Figure 1 and Figure 2As shown, when light enters the flexible light-guiding magnetic pillar 12 from its first end, it exits from its second end. When the electromagnetic conversion module 13 is energized to generate a magnetic field, the second end of the flexible light-guiding magnetic pillar 12 is displaced, causing a change in the angle between the plane containing the second end of the flexible light-guiding magnetic pillar 12 and the first direction X. The light emitted from the second end of the flexible light-guiding magnetic pillar 12 also rotates a certain angle along with the second end, thus controlling the viewing angle. Inside the flexible light-guiding magnetic pillar 12, light incident on the first reflective layer 15 cannot exit but is reflected back to the second end before exiting, ensuring a small divergence angle and high brightness for the light emitted from the second end of the flexible light-guiding magnetic pillar 12.

[0050] In the above embodiment, since the second reflective layer 16 covers the portion of the support layer 11 except for the portion corresponding to the flexible light-guiding magnetic pillar 12, the first electromagnetic conversion unit 133 can be disposed on the side of the second reflective layer 16 away from the support layer 11. At this time, the first electromagnetic conversion unit 133 does not need to consider light transmittance, so it can adopt a metal structure, and it can also adopt a three-dimensional spiral structure extending along the second direction Y.

[0051] Optionally, in some embodiments, the flexible light-guiding magnetic pillar 12 and the support layer 11 are an integral structure, which can be fabricated by hot pressing. The flexible light-guiding magnetic pillar 12 can be any material that is flexible, magnetic, and transparent. For example, it can be formed by combining magnetic powder and a flexible polymer. The magnetic powder is, for example, metal powder such as iron or cobalt. The flexible polymer is, for example, PET.

[0052] The first reflective layer 15 and the second reflective layer 16 can be formed by coating on the integral structure of the flexible light-guiding magnetic pillar 12 and the support layer 11, exposing the second end of the flexible light-guiding magnetic pillar 12. The first reflective layer 15 can be aluminum or silver, etc. The second reflective layer 16 can be aluminum or silver, etc.

[0053] Optionally, refer to Figures 1 to 3 The viewing angle control device also includes a protective frame 14, which comprises two opposing protective layers, a support layer 11, and a flexible light-guiding magnetic structure 71 disposed between the two protective layers. The protective frame 14 may be made of PET material. In some embodiments, the first electromagnetic conversion unit 133 may be disposed on the side of the second reflective layer 16 away from the support layer 11. In other embodiments, the first electromagnetic conversion unit 133 may also be disposed on the protective layer near the second end of the flexible light-guiding magnetic structure 71.

[0054] Optionally, continue to refer to Figure 1 In the initial state of the flexible light-guiding magnetic structure 71, the plane where the second end of the flexible light-guiding magnetic structure 71 is located intersects with the plane where the first end of the flexible light-guiding magnetic structure 71 is located.

[0055] Specifically, the initial state of the flexible light-guiding magnetic structure 71 can be understood as the state when the electromagnetic conversion module does not generate a magnetic field. The plane of the first end of the flexible light-guiding magnetic structure 71 is perpendicular to the first direction X. Light incident on the flexible light-guiding magnetic structure 71 along the first direction X will not be deflected but will enter the interior of the flexible light-guiding magnetic structure. In the initial state, the electromagnetic conversion module 13 does not generate a magnetic field, and the second end of the flexible light-guiding magnetic structure 71 is tilted relative to the first end. When light propagating along the first direction X is incident on the second end of the flexible light-guiding magnetic structure 71, it will be deflected, and the deflection direction is consistent with the tilt direction of the second end. For the electronic rearview mirror, which is located on the side of the driver, by having the initial state tilted, the deformation of the flexible light-guiding magnetic structure 71 that needs to be adjusted can be reduced, thereby reducing the power consumption of the electromagnetic conversion module 13 and preventing irreversible deformation of the flexible light-guiding magnetic structure 71.

[0056] Optionally, in some embodiments, the plane where the second end of the flexible light-guiding magnetic structure 71 is located in the initial state may be parallel to the plane where the first end of the flexible light-guiding magnetic structure 71 is located.

[0057] Optionally, in some embodiments, the first reflective layer 15 may completely cover the flexible light-guiding magnetic structure 17, that is, it may also cover the second end of the flexible light-guiding magnetic structure 71. In this case, the second reflective layer 16 is no longer provided on the support layer 11, and the portion of the support layer 11 without the flexible light-guiding magnetic structure emits light. Light propagating along the first direction X is incident from the outside of the flexible light-guiding magnetic structure 71 onto the sidewall of the flexible light-guiding magnetic structure 71, and is reflected by the sidewall before exiting. When the angle between the flexible light-guiding magnetic structure 71 and the support layer 11 is different, that is, when the tilt angle of the flexible light-guiding magnetic structure 71 is different, the exit angle of the reflected light is also different, thereby achieving control of the viewing angle. In this embodiment, the first electromagnetic conversion unit 133 may be a transparent structure.

[0058] Optionally, such as Figure 2 As shown, the connecting line between the first electromagnetic conversion unit 133 and the first electrode 131 is located on the surface of the support layer 11 or within the support layer. The connecting line between the first electromagnetic conversion unit 133 and the first electrode 131 connects the first end of the first electromagnetic conversion unit 133 to the first electrode 131. When disposed on the surface of the support layer 11, it is insulated from the second reflective layer 16 and the first reflective layer 15. Preferably, it can be disposed inside the support layer 11, which protects the connecting line.

[0059] Optionally, such as Figure 2As shown, the connecting line between the first electromagnetic conversion unit 133 and the second electrode 132 is located on the surface of the support layer 11 or within the support layer. The connecting line connects the second end of the first electromagnetic conversion unit 133 to the second electrode 132. When disposed on the surface of the support layer 11, it is insulated from the second reflective layer 16 and the first reflective layer 15. Preferably, it can be disposed inside the support layer 11, which protects the connecting line.

[0060] Optionally, Figure 4 This is a structural schematic diagram of another viewing angle control device provided in an embodiment of the present utility model. Figure 5 This is a schematic diagram illustrating the principle of another viewing angle control device provided in an embodiment of the present invention. In some embodiments, the electromagnetic conversion module includes a second electromagnetic conversion unit 134; along the first direction X, the second electromagnetic conversion unit 134 is located on the side of the plurality of flexible light-guiding magnetic structures 71 away from the support layer 11.

[0061] Specifically, in this embodiment, the magnetic field generated by the second electromagnetic conversion unit 134 is roughly along the first direction X, that is, it generates a force that presses down or pulls up the flexible light-guiding magnetic structure 71, causing the tilt angle of the flexible light-guiding magnetic structure 71 to change, thereby changing the viewing angle.

[0062] Optionally, continue to refer to Figure 4 and Figure 5 In some embodiments, the electromagnetic conversion module includes a third electromagnetic conversion unit 135; along the first direction X, the third electromagnetic conversion unit 135 is located on the side of the support layer 11 away from the plurality of flexible light-guiding magnetic structures 71. The magnetic field generated by the third electromagnetic conversion unit 135 is generally along the first direction X, that is, it generates a force that presses down or pulls up the flexible light-guiding magnetic structure 71, causing the tilt angle of the flexible light-guiding magnetic structure 71 to change, thereby changing the viewing angle.

[0063] Optionally, continue to refer to Figure 4 and Figure 5 The flexible light-guiding magnetic structure 71 includes a flexible light-guiding magnetic pillar 12 and a third reflective layer 17 covering the flexible light-guiding magnetic pillar 12. The third reflective layer 17 exposes the portion of the support layer 11 other than the flexible light-guiding magnetic structure 71.

[0064] Specifically, in this embodiment, the second end of the flexible light-guiding magnetic structure 71 does not emit light, and the third reflective layer 17 utilizes the different emission angles of reflected light when the tilt angle is different to achieve viewing angle control. In this embodiment, the flexible light-guiding magnetic structure 71 is not perpendicular to the support layer 11 in the initial state, but has a certain angle, to avoid the problem that when the two are perpendicular, the magnetic force along the first direction X prevents the flexible light-guiding magnetic structure 71 from changing its tilt angle.

[0065] Optionally, in some embodiments, both the second electromagnetic conversion unit 134 and the third electromagnetic conversion unit 135 can be electromagnets. These can be planar helical coils composed of ITO.

[0066] Based on the same inventive concept, this utility model also provides a display device, such as... Figure 6 As shown, Figure 6 This is a schematic diagram of a display device provided in an embodiment of the present invention. The display device includes a display panel 27 and a viewing angle control device 1 provided in any embodiment of the present invention, wherein the viewing angle control device 1 is disposed on one side of the display panel 27.

[0067] Specifically, the display panel 27 can be a liquid crystal display panel, in which case the viewing angle control device 1 can be disposed between the backlight module and the display panel 27. The light emitted from the backlight module, after its viewing angle is controlled by the viewing angle control device 1, is incident on the display panel 27, ultimately making the angle of the light emitted from the display panel 27 the same as the angle of the light emitted from the viewing angle control device 1. The display device provided in this embodiment can realize the control of the viewing angle of the emitted light.

[0068] Optionally, the display device may include an outer frame 21, a connector 22, and a circuit board 23, wherein the connector 22 is used to connect the viewing angle control device 1 via an FPC and a conductive core, and the connector 22 is disposed on the circuit board 23. The backlight module may include a light source 24 and a light guide plate 25, and the backlight module may also include optical films such as a reflector and a diffuser.

[0069] Optionally, the display device further includes a diffusion film 26, which is disposed between the viewing angle control device 1 and the display panel 27. The diffusion film 26 can diffuse the emitted light from the viewing angle control device 1 into a surface light source.

[0070] Optionally, in some embodiments, if the display panel is an active light-emitting panel, such as an OLED (Organic Light Emitting Diode) display panel, the viewing angle control device 1 can be located on the light-emitting side of the display panel.

[0071] Optionally, in some embodiments, the display device further includes a viewing angle adjustment knob for adjusting the voltage applied to the electromagnetic conversion module to adjust the strength of the magnetic field, thereby adjusting the viewing angle of the display device. The viewing angle adjustment knob can adjust the voltage by adjusting a resistance. The viewing angle adjustment knob can be located on the vehicle near the driver.

[0072] Optionally, in some implementations, the viewing angle adjustment knob, the driving module of the display panel, and the driving module of the light source in the backlight module can be located on the same circuit board.

[0073] Based on the same inventive concept, this utility model also provides an electronic rearview mirror, which includes the display device provided in any embodiment of this utility model and has the same beneficial effects, which will not be described in detail here.

[0074] Based on the same inventive concept, this utility model also provides a vehicle, which includes the electronic rearview mirror provided in any embodiment of this utility model and has the same beneficial effects, which will not be described in detail here.

[0075] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0076] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A viewing angle control device, characterized in that, The view control device includes: Support layer; Multiple flexible light-guiding magnetic structures are provided, wherein a first end of each flexible light-guiding magnetic structure is fixed to one side of the support layer, and a second end of each flexible light-guiding magnetic structure is located on the side of its first end away from the support layer along a first direction. The flexible light-guiding magnetic structure is used to guide light incident on the flexible light-guiding magnetic structure; wherein the first direction is perpendicular to the support layer. An electromagnetic conversion module is used to generate a magnetic field to control the position of the second end of the flexible light-guiding magnetic structure.

2. The viewing angle control device according to claim 1, characterized in that, The electromagnetic conversion module includes at least one first electrode, at least one second electrode, and at least one first electromagnetic conversion unit; Along the second direction, the first electrode and the second electrode are disposed on both sides of at least part of the flexible light-guiding magnetic structure, the first electromagnetic conversion unit is disposed between the first electrode and the second electrode, the first end of the first electromagnetic conversion unit is electrically connected to the first electrode, and the second end of the first electromagnetic conversion unit is electrically connected to the second electrode; the second direction intersects the first direction.

3. The viewing angle control device according to claim 2, characterized in that, The first electromagnetic conversion unit is disposed between the first electrode and the corresponding second electrode, and between any two adjacent flexible light-guiding magnetic structures along the second direction.

4. The viewing angle control device according to claim 2, characterized in that, The flexible light-guiding magnetic structure includes a flexible light-guiding magnetic column and a first reflective layer. The first end of the flexible light-guiding magnetic column is fixedly connected to the support layer. The first reflective layer covers the side of the flexible light-guiding magnetic column and exposes the second end of the flexible light-guiding magnetic column. The viewing angle control device further includes a second reflective layer, which covers the support layer and is in contact with the first reflective layer.

5. The viewing angle control device according to claim 4, characterized in that, In the initial state of the flexible light-guiding magnetic structure, the plane containing the second end of the flexible light-guiding magnetic structure intersects with the plane containing the first end of the flexible light-guiding magnetic structure.

6. The viewing angle control device according to claim 2, characterized in that, The first electromagnetic conversion unit is fixed to the support layer, and the connection line between the first electromagnetic conversion unit and the first electrode is located on the surface of the support layer or within the support layer; and / or, The connection line between the first electromagnetic conversion unit and the second electrode is located on the surface of the support layer or within the support layer.

7. The viewing angle control device according to claim 1, characterized in that, The electromagnetic conversion module includes a second electromagnetic conversion unit, which is located on the side of the plurality of flexible light-guiding magnetic structures away from the support layer along the first direction. And / or, the electromagnetic conversion module includes a third electromagnetic conversion unit located on the side of the support layer away from the plurality of flexible light-guiding magnetic structures.

8. The viewing angle control device according to claim 7, characterized in that, The flexible light-guiding magnetic structure includes a flexible light-guiding magnetic pillar and a third reflective layer covering the flexible light-guiding magnetic pillar. The third reflective layer exposes the portion of the support layer other than the flexible light-guiding magnetic structure.

9. A display device, characterized in that, The display device includes a display panel and a viewing angle control device as described in any one of claims 1-8, wherein the viewing angle control device is disposed on one side of the display panel.

10. An electronic rearview mirror, characterized in that, The electronic rearview mirror includes the display device as described in claim 9.

Images