Shading system and head-up display device

Abstract

The invention provides a shading system and a head-up display device. The shading system and the head-up display device are used for preventing light from entering the head-up display device from a windshield. The shading system comprises a shading film located on the windshield; the shading film comprises a plurality of electrode groups and an electrochromic material; the electrode group comprises at least one first electrode and at least one second electrode, and the first electrode and the second electrode extend in the first direction and are located on the two opposite sides in the direction perpendicular to the plane where the shading film is located respectively. The shading system further comprises a human eye tracking system, and the human eye tracking system is used for recognizing human eye coordinates in real time. The multiple electrode sets are arranged, when the electrode sets are powered on, ions in the electrochromic material can be gathered towards the electric field area, so that the shading face made of the electrochromic material is formed in the electric field area, and the formed shading face is perpendicular to the plane where the windshield is located; and most sunlight can be shielded by the shading surface, so that the amount of light entering the interior of the automobile is reduced.

Description

Technical Field

[0001] This application relates to the field of optical technologies, and particularly to a light-shielding system and a head-up display device. Background Art

[0002] In the applications of some displays, they are easily interfered by external ambient light, which is not conducive to improving the service life, display effect, etc. of the displays. For example, in-vehicle display screens or head-up display devices used in automobiles, these displays are generally prepared on one side close to the windshield. However, sunlight is also more likely to pass through the windshield and shine on the display. Especially when the sun is sufficient during the day, the external light source gathers and shines on the display, causing the temperature of the display to be too high. After the display is affected by high temperature for a long time, it will cause the internal components of the display to age rapidly, reducing its overall service life, or making the display effect worse, etc. Summary of the Invention

[0003] In view of this, this application provides a light-shielding system and a head-up display device to facilitate solving the above problems.

[0004] This application provides a light-shielding system for blocking light from entering a head-up display device through a windshield; the light-shielding system includes: a light-shielding film located on the windshield; the light-shielding film includes a plurality of electrode groups and an electrochromic material; the electrode group includes at least one first electrode and at least one second electrode, both the first electrode and the second electrode extend along a first direction, and the first electrode and the second electrode are respectively located on opposite sides in the direction perpendicular to the plane of the light-shielding film, and the first direction is parallel to the plane of the light-shielding film.

[0005] An eye-tracking system for real-time identification of eye coordinates.

[0006] Based on the same inventive concept, this application also provides a head-up display device applying the light-shielding system provided in the first aspect.

[0007] In the present application, a light-shielding system is provided to block light. Considering the application scenario of blocking sunlight from entering the vehicle interior through the windshield and reaching the head-up display device, the light-shielding system includes a light-shielding film and an eye-tracking system. The light-shielding film contains electrochromic materials and is equipped with multiple electrode groups. When the electrode groups are energized, ions in the electrochromic materials gather towards the electric field region, forming a light-shielding surface composed of electrochromic materials within the electric field region. The formed light-shielding surface extends from the first electrode towards the second electrode. There is a light-shielding surface on the windshield that intersects at least part of the sunlight incident direction, which helps ensure that at least part of the sunlight is blocked by the light-shielding surface, thereby reducing the amount of light entering the vehicle interior. Furthermore, it helps reduce the impact of sunlight on the head-up display device, lower the risk of the head-up display device being damaged by high temperatures, and also reduce the risk of light directly irradiating the display screen of the head-up display device or shining into the eyes and affecting driving safety, improving the safety during driving. Additionally, an eye-tracking system is provided in the light-shielding system, which helps identify the position of the human eye using the eye-tracking system. Thus, it is possible to adjust the switching status of the multiple electrode groups in the light-shielding film according to the position of the human eye, which is beneficial for more scientifically adjusting factors such as the number of switched-on electrodes or the switched-on area, improving the usability and light-shielding effect of the light-shielding system. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0009] Figure 1 Schematic diagram of the application of a light-shielding system provided by an embodiment of the present application; Figure 2 Schematic diagram of the operation of a light-shielding film provided by an embodiment of the present application; Figure 3 For an embodiment of the present application Figure 1 Partial light-shielding schematic diagram of the light-shielding film provided therein; Figure 4 Schematic diagram of the application of a light-shielding system provided by an embodiment of the present application; Figure 5 An embodiment of the present application provides Figure 4 Partial light-shielding schematic diagram of the light-shielding film provided therein; Figure 6 Another schematic diagram of the application of a light-shielding system provided by an embodiment of the present application; Figure 7 Partial planar schematic diagram along the light-shielding film provided by an embodiment of the present application; Figure 8 A schematic plan view of a light-shielding film provided by an embodiment of the present application; Figure 9 A schematic cross-sectional view along the A-A' direction provided by an embodiment of the present application; Figure 10 A partial cross-sectional view of a light-shielding film provided by an embodiment of the present application; Figure 11 An application schematic diagram of another light-shielding system provided by an embodiment of the present application; Figure 12 A schematic plan view of another light-shielding film provided by an embodiment of the present application; Figure 13 A schematic plan view of a light-shielding film provided by an embodiment of the present application; Figure 14 A schematic plan view of another light-shielding film provided by an embodiment of the present application; Figure 15 A schematic plan view of another light-shielding film provided by an embodiment of the present application; Figure 16 A working schematic diagram of another main control module provided by an embodiment of the present application. Detailed implementation manners

[0010] In order to better understand the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0011] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0012] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0013] It should be understood that the term " / and" used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0014] In the description of this specification, it should be understood that the words such as "substantially", "approximately", "about", "around", "roughly", and "generally" described in the claims and embodiments of this application refer to values that can be generally recognized within a reasonable process operation range or tolerance range, rather than an exact value.

[0015] It should be understood that although terms such as first and second may be used in the embodiments of this application to describe electrodes, directions, regions, etc., these should not be limited to these terms. These terms are only used to distinguish electrodes, directions, regions, etc. from each other. For example, without departing from the scope of the embodiments of this application, the first electrode may also be referred to as the second electrode, and similarly, the second electrode may also be referred to as the first electrode. Through careful and in-depth research, the applicant of this case has provided a solution to the problems existing in the prior art.

[0016] Figure 1 It is a schematic diagram of the application of a light-shielding system provided by an embodiment of this application. Figure 2 It is a schematic diagram of the operation of a light-shielding film provided by an embodiment of this application. A light-shielding system 100 according to an embodiment of this application. The light-shielding system in the related art is used to block light from entering the head-up display device through the windshield. The head-up display device is a device that projects the driving information displayed on the display panel in the head-up display device into the driver's field of vision through the windshield using the principle of optical reflection. Generally, the head-up display device is located on the platform below the windshield corresponding to the driver's seat. Of course, the position of the head-up display device prepared in the vehicle is not limited to this, and it can also be in other positions in the vehicle that are easily irradiated by light. During the use of the vehicle, ambient light such as sunlight is likely to pour into the head-up display device through the windshield, which not only easily causes the content displayed on the head-up display device to be blurred by reflection, but also easily causes the temperature of the head-up display device to rise, which is not conducive to the use of the head-up display device and thus not conducive to driving safety. Therefore, an embodiment of this application provides a light-shielding system 100, as Figure 1 shown, the light-shielding system 100 is used to block the light L1 from entering the head-up display device 300 through the windshield 200, thereby improving the service life and usage effect of the head-up display device 300 and ensuring driving safety.

[0017] The light-shielding system 100 according to an embodiment of the present application includes a light-shielding film 10, and the light-shielding film 10 is located on the windshield 200. And the provided light-shielding film 10 includes a plurality of electrode groups 20 and an electrochromic material 30. The electrochromic material 30 is a special material that can reversibly change its optical properties, such as color, transparency, etc. under the action of an external electric field. In the embodiment of the present application, taking the electrochromic material 30 as an example of an electrochromic material for illustration, when an external electric field is applied to the electrochromic material 30, particle movement will occur inside the material. In the embodiment of the present application, taking the characteristic that the ions in the adopted electrochromic material 30 gather towards the position where the electric field is applied as an example for illustration. This change enables the material to exhibit different transparencies in different states. Preferably, the light-shielding film 10 can be arranged inside the windshield 200 or in a film layer close to the interior of the vehicle, which is beneficial to reducing the risk of damage to the light-shielding film 10 caused by wind erosion, water and oxygen, etc. when the light-shielding film 10 is in the outermost layer close to the external environment, and improving the durability and reliability of the light-shielding film 10.

[0018] Continue to refer to Figure 2 As shown, the electrode group 20 is provided to include at least one first electrode 20A and at least one second electrode 20B. Both the first electrode 20A and the second electrode 20B extend along the first direction X1, and the first electrode 20A and the second electrode 20B are respectively located on opposite sides in the direction perpendicular to the plane where the light-shielding film 10 is located. The first direction X1 is parallel to the plane where the light-shielding film 10 is located. In Figure 2 an example is given with a schematic diagram of the light-shielding film 10 from a planar perspective. A plurality of first electrodes 20A and second electrodes 20B are arranged on the windshield 200. An electric field can be formed between the first electrode 20A and the second electrode 20B, and the electrochromic material 30 is included between the first electrode 20A and the second electrode 20B. As shown in Figure 2 Figure (a) in, when no voltage is applied to the electrode group 20, the ions in the electrochromic material 30 are in a free state and basically do not affect the transparency of the windshield 200, and external light can normally pass through the windshield 200 and irradiate into the vehicle. As shown in Figure 2 Figure (b) in, when a voltage is applied to the first electrode 20A and the second electrode 20B, an electric field is formed between the first electrode 20A and the second electrode 20B in the direction from the first electrode 20A to the second electrode 20B. The ions in the electrochromic material 30 will gather towards the electric field, and the ion density at the electric field increases, thus forming a barrier similar to a light-shielding surface. And, the first electrode 20A and the second electrode 20B are both arranged to extend along the first direction X1. Refer to Figure 2The first direction X1 shown is the direction from the driver's seat to the passenger seat. In this way, the electric field formed by the first electrode 20A and the second electrode 20B in an electrode group 20 is a plane between the first electrode 20A and the second electrode 20B and extending along the first direction X1. Then, when the ions in the electro-deformable material 30 gather in this electric field, a light-shielding surface parallel or intersecting with the plane where the windshield 200 is located and extending along the first direction X1 is formed. It can be understood that after such a light-shielding surface is formed on the windshield 200, most of the light transmitted from the outside of the vehicle to the vehicle windshield 200 will be blocked, thereby reducing the amount of light that pours back into the vehicle. Taking the sunlight L1 incident longitudinally on the windshield 200 as an example, when the light is incident on the windshield, there is an electric field on the light-shielding film 10 on the windshield 200 that intersects with the direction from the first electrode 20A to the second electrode 20B, that is, there is a light-shielding surface on the light-shielding film 10 that intersects with the direction of the longitudinally incident light, so that the light will be reflected or refracted after hitting the light-shielding surface, thereby reducing the amount of light directly incident into the vehicle interior. Similarly, it also reduces the influence of sunlight irradiating the head-up display device 300 and causing its temperature to rise, and improves the service life and usage effect of the head-up display device 300.

[0019] Of course, in some other embodiments, the light-shielding film 10 can also be applied to other scenarios that require light shielding, such as light shielding protection for open-air shielding, etc.

[0020] When the light-shielding film 10 is used in the windshield 200 of a vehicle, due to the change of the driving scenario, the working mode of the light-shielding film 10 may need to be considered. Optionally, when the vehicle stops driving, all the electrode groups 20 in the light-shielding film 10 can be energized to generate an electric field, thereby forming a light-shielding surface that can be distributed on the entire windshield 200 to protect the head-up display device 300 or other structures inside the vehicle from sunlight exposure. Optionally, during the driving process of the vehicle, according to the driving needs of the driver 400, different regions of the electrode group 20 can be selected to be turned on to form an electric field, so as to form a light-shielding effect in different regions. For example, during driving, a smaller number of electrode groups 20 are turned on within the direct viewing angle range of the driver 400 facing the windshield 200, reducing the number of light-shielding surfaces on the windshield 200 and improving the visibility of the windshield 200. Or, the electrode group 20 is selectively turned on according to the viewing angle of the human eye, so that the turned-on electrode group 20 is parallel to the viewing angle of the driver 400, thereby reducing the influence on the line of sight of the driver 400.

[0021] Further, continue to refer to Figure 1As shown, it is proposed to further provide a human eye tracking system 500 in the light-shielding system 100. The human eye tracking system 500 is used to identify the human eye coordinates in real time. Taking the position of the driver as an example, there is a virtual coordinate axis, with the horizontal axis being x and the vertical axis being y. The human eye coordinates can represent the height and horizontal position where the human eye is located. Combining with the above embodiments, linking the human eye tracking system 500 with the light-shielding film 10 is beneficial to making the light-shielding film 10 more scientifically applied in the automotive usage scenario. Optionally, the human eye tracking system 500 includes an optical sensor, which can track and identify the human eye coordinates 501, that is, the position where the human eye is located. The human eye tracking system 500 captures the driver's eye position by using an optical sensor, and the sensor can be installed on the dashboard, steering wheel, windshield or rearview mirror, etc. Or a single camera can determine the eye position by focusing distance, or multiple sensors can be used for multi-angle positioning. And the sensor can adopt technologies such as infrared light to ensure effective acquisition even in a dark environment or when wearing sunglasses. The light-shielding system 100 establishes a coordinate system based on the position of the windshield 200. After the human eye tracking system 500 shares the human eye coordinate information with the light-shielding system 100, the light-shielding system 100 can determine whether the coordinates of the first electrode 20A and the second electrode 20B in different electrode groups 20 and the point where the human eye coordinates are located are in a straight line. If so, the corresponding electrode group 20 can be activated to form an electric field for blocking light, and the electric field formed by the electrode group 20 is parallel to the human eye line of sight, which is beneficial to reducing the aspect that the light-blocking surface formed by the electric field affects the human eye line of sight.

[0022] In the embodiments of the present application, a light-shielding system 100 is provided to block light. Considering the application of blocking sunlight from passing through the windshield 200 and entering the head-up display device 300 inside the vehicle, the light-shielding system 100 includes a light-shielding film 10 and an eye-tracking system 500. The light-shielding film 10 includes an electrochromic material 30, and a plurality of electrode groups 20 are arranged accordingly. When the electrode groups 20 are energized, ions in the electrochromic material 30 can gather towards the electric field region, thereby forming a light-shielding surface composed of the electrochromic material 30 in the electric field region. The formed light-shielding surface extends in the direction from the first electrode 20A to the second electrode 20B. There is a light-shielding surface on the windshield 200 that intersects at least part of the sunlight incident direction, which is beneficial to ensuring that at least part of the sunlight is blocked by the light-shielding surface, thereby reducing the amount of light entering the vehicle interior. Furthermore, it is beneficial to reduce the illumination effect of sunlight on the head-up display device 300, reduce the risk of damage to the head-up display device 300 due to high temperature, and also beneficial to reduce the risk that light directly irradiates the display screen of the head-up display device 300 or irradiates the human eye, affecting driving safety, thus improving the safety during driving. In addition, an eye-tracking system 500 is also provided in the light-shielding system 100, which is beneficial to identifying the position of the human eye by using the eye-tracking system 500, so that the switching status of the plurality of electrode groups 20 in the light-shielding film 10 can be adjusted according to the position of the human eye. It is beneficial to more scientifically adjust factors such as the number of switched-on electrode groups 20 or the switched-on area, improving the usability and light-shielding effect of the light-shielding system 100.

[0023] Figure 3 A kind provided by the embodiments of the present application Figure 1 Partial light-shielding schematic diagram of the light-shielding film provided in Figure 4 Application schematic diagram of a light-shielding system provided by the embodiments of the present application Figure 5 A kind provided by the embodiments of the present application Figure 4 Partial light-shielding schematic diagram of the light-shielding film provided in

[0024] In an embodiment of the present application, the electrochromic material 30 is an electrochromic material or an electro-optical effect material.

[0025] Optionally, the electrochromic material 30 is set as an electrochromic material, such as tungsten trioxide material. Combining Figure 1 、 Figure 3 As shown, Figure 3The "×" sign in it indicates the absence of this light ray. The electrochromic material can generate ion movement when driven by the electric field C1 of the light-shielding film, thereby increasing the ion density at the electric field C1 of the light-shielding film, reducing the transparency at the electric field C1 of the light-shielding film, and thus achieving the blocking effect on sunlight L1, so that most of the sunlight L1 does not pass through the electric field C1 of the light-shielding film to reach the interior of the vehicle, reducing the amount of light from the sunlight L1 passing through the windshield 200 and shining on the head-up display device 300, and being beneficial to reducing the influence of the sunlight L1 on the human eye's line of sight L2.

[0026] Optionally, the electro-optic effect material is provided in the light-shielding film 10, such as lithium niobate. Combined with Figure 4 , Figure 5 As shown, the electro-optic effect material can change at least part of the light path passing through the windshield 200. When the electro-optic effect material is under the action of the electric field C1 of the light-shielding film, the refractive index of the material changes, so that when light rays such as sunlight L1 reach the light-shielding film 10, the irradiation path of the light rays changes, so that part of the light source that would originally shine on the head-up display device 300 is offset, thus avoiding the heat accumulation caused by light irradiation at the head-up display device 300.

[0027] Figure 6 It is a schematic diagram of the application of another light-shielding system provided by the embodiment of the present application.

[0028] In an embodiment of the present application, as Figure 6 shown, a light-shielding film electric field C1 is formed between the first electrode 20A and the second electrode 20B. At least part of the light-shielding film electric field is parallel to the line of sight of the human eye facing the windshield 200 side, which is beneficial for when the human eye is looking at the side where the windshield 200 is located, the light-shielding surface formed at the electric field C1 of the light-shielding film is not perpendicular to the human eye's line of sight L2, so that the light-shielding surface formed by the light-shielding film electric field can block the sunlight entering from a vertical angle or other angles close to the vertical angle, and will not block the visual light reflected to the human eye from a parallel angle, thereby reducing the influence of the light-shielding surface formed by the electric field C1 of the light-shielding film on the human eye's observation effect, and ensuring that the human eye can normally view the road conditions outside the windshield 200.

[0029] Figure 7 It is a partial plane schematic diagram of the light-shielding film provided by the embodiment of the present application.

[0030] In an embodiment of the present application, as Figure 7 shown, along the direction parallel to the plane where the light-shielding film 10 is located and perpendicular to the extension of the first electrode 20A and the second electrode 20B, that is, along the direction perpendicular to the first direction X1, the width D1 of the first electrode 20A and the second electrode 20B is between 10 nm and 50 nm.

[0031] In an embodiment of the present application, the first electrode 20A and the second electrode 20B are disposed on a plane parallel to the plane where the light-shielding film 10 is located, and the widths of the first electrode 20A and the second electrode 20B in a direction perpendicular to the first direction X1 are between 10 nm and 50 nm. Then, the width D1 of the light-shielding film electric field between a pair of the first electrode 20A and the second electrode 20B in a direction perpendicular to the first direction X1 is also in the vicinity of the range of 10 nm to 50 nm, which is beneficial to making the thickness of the light-shielding surface formed by the ions aggregated in the light-shielding film electric field also in the vicinity of the range of 10 nm to 50 nm. It can be understood that the vertical width of the human eye is on the order of cm, which is relatively large compared to the light-shielding surface on the order of nm, which is beneficial to reducing the visual impact of the light-shielding surface formed by the light-shielding film electric field on the human eye, thereby further ensuring driving safety when using the light-shielding film 10.

[0032] Figure 8 A plan view of a light-shielding film provided by an embodiment of the present application Figure 9 An embodiment provided by the present application Figure 8 A cross-sectional view along the A-A' direction in

[0033] In an embodiment of the present application, as Figure 8 shown, the electrode group 20 includes a first electrode 20A and N second electrodes 20B, where N≥2.

[0034] The first electrode 20A is located on the side of the light-shielding film 10 facing the human eye, and the number of the first electrodes 20A disposed on the side of the light-shielding film 10 close to the driver 400 is less than that of the second electrodes 20B. The plurality of second electrodes 20B in the same electrode group 20 are arranged in the second direction X2, and the second direction X2 is parallel to the plane where the light-shielding film 10 is located and intersects with the first direction X1. Among them, in the same electrode group 20, an electric field is formed between the first electrode N1 and one of the N second electrodes N2 at the same moment.

[0035] In an embodiment of the present application, N = 5 is taken as an example for illustration. Exemplarily, as Figure 8 shown, one first electrode 20A in an electrode group 20 is provided corresponding to 5 second electrodes 20B. The 5 second electrodes 20B all extend along the first direction X1 and are arranged in sequence along the second direction X2. Combining Figure 9 shown, Figure 9The dotted line connection between the first electrode 20A and the second electrode 20B in indicates the direction trend of the shading film electric field C1 between the two. From the perspective of the direction of the electric field formed between the first electrode 20A in one electrode group 20 and different second electrodes 20B, the electric field directions of the shading film electric field C1 formed between the first electrode 20A and the first to fifth second electrodes 20B5 arranged in the second direction X2 are different. This is beneficial for judging the viewing angle of the human eye towards the windshield 200 side according to the human eye coordinates, and further judging which second electrode 20B forms an electric field parallel to the human eye line of sight with the first electrode 20A, and then driving an electric field to be formed between the second electrode 20B and the first electrode 20A.

[0036] In an embodiment of the present application, setting the multiple second electrodes 20B in the same electrode group 20 to be non-electrically connected is beneficial for individually controlling the multiple second electrodes 20B, thereby facilitating the flexible control of the position of the turned-on electric field according to the human eye position, which can not only achieve the shading of sunlight but also ensure that the driving line of sight is not blocked.

[0037] In an embodiment of the present application, in the same electrode group 20, the angles formed between the electric fields formed between two adjacent second electrodes 20B and the first electrode 20A and the windshield 200 differ by α, where 0° < α ≤ 10°. This is beneficial for ensuring that the angle differences between the electric fields formed between two adjacent second electrodes 20B and the first electrode 20A and the windshield 200 are small, thereby avoiding the situation where, among two adjacent second electrodes 20B, the angle formed between the electric field formed between one second electrode 20B and the first electrode 20A and the windshield 200 is close to the angle formed between the human eye line of sight and the windshield 200. When the human eye line of sight moves slightly on this basis, that is, moves by a small angle, the angle difference between the angle formed between the electric field formed between the other second electrode 20B and the first electrode 20A and the windshield 200 and the angle formed between the human eye line of sight and the windshield is large, resulting in no second electrode 20B in the electrode group 20 that can better match the human eye line of sight.

[0038] Therefore, setting the angles formed between the electric fields formed between two adjacent second electrodes 20B and the first electrode 20A and the windshield 200 to differ by α, where 0° < α ≤ 10°, is beneficial for making the angle differences between the electric fields formed between the first electrode 20A in one electrode group 20 and multiple second electrodes 20B and the windshield 200 small, which is beneficial for the electrode group 20 to more precisely cooperate with the movement of the human eye line of sight, thereby enabling the human eye to observe the road conditions more smoothly.

[0039] In addition, the sunlight enters the head-up display device 300 from the windshield 200 at different angles at different times. By arranging an electrode group 20 to include a first electrode 20A and a plurality of second electrodes 20B, electric fields at different angles can be formed, which is beneficial for the light-shielding system 100 to adjust the activated first electrode 20A and second electrodes 20B according to the sunlight incident angle. Moreover, by coordinating the arrangement such that the difference in the angle between the electric fields formed between the first electrode 20A and the plurality of second electrodes 20B in an electrode group 20 and the windshield 200 is small, it is beneficial for more precisely blocking sunlight at different angles and controlling which first electrode 20A and second electrodes 20B are activated, which helps avoid resource waste and improve the light-shielding efficiency and light-shielding accuracy of the light-shielding system 100.

[0040] Figure 10 This is a partial cross-sectional schematic diagram of a light-shielding film provided by an embodiment of the present application.

[0041] In an embodiment of the present application, along the direction perpendicular to the plane where the light-shielding film 10 is located, the thickness of the light-shielding film 10 is h; in the second direction X2, the distance between two adjacent first electrodes 20A is d.

[0042] Generally, the driver's field of view is within a range of 40° up and down in the second direction X2, and the assembly angle between the windshield 200 and the horizontal plane is within the range of 35° - 45°; exemplarily, the angle range between the electric fields formed between the first electrode 20A in an electrode group 20 and different second electrodes 20B and the light-shielding film 10 is between 15° and 65°. Taking the angle between the windshield 200 and the horizontal plane during assembly as 45° and the angle between the electric field formed between the activated first electrode 20A and the second electrode 20B in the same electrode group 20 and the light-shielding film 10 as 65° as an example. When the sunlight L1 directly irradiates the windshield 200 along the direction perpendicular to the horizontal plane, the angle between the sunlight L1 and the windshield 200 is 45 degrees. Taking the deviation of the incident angle of the sunlight L1 on the windshield by ±30° as an example. As Figure 10 shown in FIG. (a) therein, when the sunlight L1 irradiates the windshield 200 at an angle of 75° with respect to the windshield 200, the distance d between two adjacent first electrodes 20A that can both form a 65° electric field is d = h / (tan75°) + = h / (tan65°) ≈ 0.73h. As Figure 10 shown in FIG. (b) therein, when the sunlight L1 irradiates the windshield 200 at an angle of 15° with respect to the windshield 200, the distance d between two adjacent first electrodes 20A that can both form a 65° electric field is d = h / (tan15°) + h / (tan65°) ≈ 4.2h.

[0043] In addition, some gaps can also be flexibly set between two adjacent electrode groups 20, so that the maximum distance between two adjacent first electrodes 20A in the second direction X2 can be set to 4.73h.

[0044] In the embodiment of the present application, the distance between two adjacent first electrodes 20A in the second direction X2 is between 0.73h ≤ d ≤ 4.73h, which is beneficial to provide some basis for the arrangement of the first electrodes 20A and the electrode groups 20 on the light-shielding film 10, provide some technical references for relevant technicians when using this solution, improve the scientificity of the arrangement of the electrode groups 20 and improve the usability of the embodiment of the present application.

[0045] Figure 11 It is a schematic diagram of the application of another light-shielding system provided by the embodiment of the present application.

[0046] In an embodiment of the present application, in combination with Figure 11 As shown, along the second direction X2, in the area of the light-shielding film 10 that is closer to the head-up display device 300, the density of the first electrodes 20A is smaller. In the embodiment of the present application, an example is given in which one electrode group 20 includes one first electrode 20A and three second electrodes 20B. In the second direction X2, at the position where the light-shielding film 10 is closer to the head-up display device 300, it is also the position where the windshield 200 is closer to the head-up display device 300. Taking the head-up display device 300 located on the platform in front of the driver's seat as an example, the head-up display device 300 is close to the lower part of the windshield 200. From the entire plane of the windshield 200, the electric field area between the first electrode 20A and the second electrode 20B in the lower part of the windshield 200 in the light-shielding film 10 is larger, that is, the area of the light-shielding surface formed at this position is larger. Therefore, when setting the first electrode 20A, the density of the first electrodes 20A in the light-shielding film 10 in the area close to the head-up display device 300 can be appropriately reduced.

[0047] The density of the first electrodes 20A set in the area of the light-shielding film 10 that is farther from the head-up display device 300 in the second direction X2 is higher. In this area, there are more angles at which sunlight can enter. The density of the first electrodes 20A set is larger. Similarly, the area of the light-shielding surface formed in this area is smaller. Therefore, setting a relatively dense light-shielding surface is beneficial to ensure the light-shielding effect of the light-shielding film 10 in the area farther from the head-up display device 300.

[0048] Figure 12 It is a schematic plan view of another light-shielding film provided by the embodiment of the present application.

[0049] In an embodiment of the present application, as Figure 12As shown, a plurality of first electrodes 20A in the light-shielding film 10 extend along the first direction X1 and are arranged along the second direction X2. A plurality of second electrodes 20B extend along the first direction X1 and are arranged along the second direction X2. The plurality of first electrodes 20A distributed in the first direction X1 are of a continuous structure, and the plurality of second electrodes 20B distributed in the first direction X1 are also of a continuous structure, which is beneficial to reducing the number of the first electrodes 20A and the second electrodes 20B prepared in the light-shielding film 10 by extending the first electrodes 20A and the second electrodes 20B in the first direction X1, and is beneficial to generating a continuous electric field when the electrode group 20 is energized, so as to form a continuous light-shielding surface and improve the light-shielding effect. Moreover, it is also beneficial to reducing the number of control traces or control devices that need to be prepared in the light-shielding film 10, and reducing the manufacturing cost and process complexity of the light-shielding film 10.

[0050] In an embodiment of the present application, continue to refer to Figure 8 As shown, a plurality of first electrodes 20A extend along the first direction X1 and are arranged along the first direction X1 and the second direction X2. A plurality of second electrodes 20B extend along the first direction X1 and are arranged along the first direction X1 and the second direction X2.

[0051] The plurality of first electrodes 20A distributed in the first direction X1 are of a discontinuous structure, and the plurality of second electrodes 20B distributed in the first direction X1 are also of a discontinuous structure, which increases the number of the first electrodes 20A and the second electrodes 20B prepared in the light-shielding film 10, and is beneficial to more precisely driving the electrode group 20 to form an electric field by regions or in quantities, and more accurately adjusting the position of the electric field where the light-shielding surface can be formed.

[0052] Figure 13 It is a schematic plan view of a light-shielding film provided by an embodiment of the present application. Figure 14 It is another schematic plan view of a light-shielding film provided by an embodiment of the present application. Figure 15 It is another schematic plan view of a light-shielding film provided by an embodiment of the present application.

[0053] In an embodiment of the present application, as Figures 13 - 15 shown, the light-shielding film 10 at least includes a first region 101 and a second region 102 adjacent in the first direction X1 and / or the second direction X2. In an embodiment of the present application, optionally, as Figure 13As shown, here, it is taken as an example that a plurality of first electrodes 20A extend along the first direction X1 and are arranged along the first direction X1 and the second direction X2; a plurality of second electrodes 20B extend along the first direction X1 and are arranged along the first direction X1 and the second direction X2. The number of electrode groups 20 turned on in the first region 101 and the second region 102 adjacent in the first direction X1 is different. In the first direction X1, the first region 101 corresponds to the position where the head-up display device 300 is located, and the second region 102 corresponds to the co-pilot position. It can be set that the number of electrode groups 20 turned on in the first region 101 is greater than the number of electrode groups 20 turned on in the second region 102, which is beneficial to ensuring the sunlight blocking effect in the first region 101, thereby protecting the head-up display device 300.

[0054] Optionally, as Figure 14 shown, here, it is taken as an example that a plurality of first electrodes 20A in the light-shielding film 10 extend along the first direction X1 and are arranged along the second direction X2; a plurality of second electrodes 20B extend along the first direction X1 and are arranged along the second direction X2. The number of electrode groups 20 turned on in the first region 101 and the second region 102 adjacent in the second direction X2 is different. In the second direction X2, the first region 101 is a region farther from the position where the head-up display device 300 is located, and the second region 102 is a region closer to the position where the head-up display device 300 is located. It can be set that the number of electrode groups 20 turned on in the first region 101 is greater than the number of electrode groups 20 turned on in the second region 102. Since there are more sunlight incident angles in the first region 101, setting the number of electrode groups 20 turned on in the first region 101 to be larger is beneficial to ensuring the light-shielding effect in the first region 101.

[0055] Optionally, as Figure 15As shown, here it is also taken as an example that multiple first electrodes 20A extend along the first direction X1 and are arranged along the first direction X1 and the second direction X2; multiple second electrodes 20B extend along the first direction X1 and are arranged along the first direction X1 and the second direction X2. The light-shielding film 10 at least includes a first region 101 and a second region 102 adjacent to each other in the first direction X1 and the second direction X2. Taking the first region 101 including a first sub-region 101A and a second sub-region 101B arranged in the second direction X2, and the second region 102 including a third sub-region 102A and a fourth sub-region 102B arranged in the second direction X2 as an example, the first sub-region 101A in the first region 101 and the third sub-region 102A in the second region 102 are adjacent in the first direction X1, and the second sub-region 101B in the first region 101 and the fourth sub-region 102B in the second region 102 are adjacent in the first direction X1, which is beneficial to more precisely divide different regions on the light-shielding film 10. By adjusting the number of activated electrode groups 20 included in the first sub-region 101A, the second sub-region 101B, the third sub-region 102A, and the fourth sub-region 102B adjacent to each other in the first direction X1 and the second direction X2, the number of activated electrode groups 20 in different regions can be more precisely adjusted in different usage scenarios.

[0056] It should be further noted that, in the embodiment of the present application, at least one first electrode 20A is electrically connected to the same driving signal line, and at least one second electrode 20B is electrically connected to the same driving signal line. The driving signal line to which the first electrode 20A and the second electrode 20B are electrically connected can be a transparent trace, which is beneficial to avoiding the influence on the driver's line of sight after the trace is extended and prepared on the windshield 200.

[0057] In an embodiment of the present application, continue to refer to Figure 1 As shown, it is provided that the light-shielding system 100 further includes a temperature adjustment system 600, and the temperature adjustment system 600 is used to monitor the temperature of the head-up display device 300. When the temperature adjustment system 600 detects that the temperature of the head-up display device 300 is greater than or equal to a preset temperature, at least part of the electrode groups 20 are activated to generate an electric field. The preset temperature is judged as the temperature threshold at which the head-up display device 300 has a risk of damage when the temperature of the head-up display device 300 is higher than the preset temperature. At this time, at least part of the electrode groups 20 in the light-shielding system 100 are driven to block part of the sunlight from continuing to enter the head-up display device 300, thereby avoiding the situation that the temperature of the head-up display device 300 further increases.

[0058] Optionally, it is provided that the temperature adjustment system 600 is located on the side wall or below the screen of the head-up display device 300.

[0059] In an embodiment of the present application, continue to refer to Figure 1As shown, the light-shielding system 100 further includes a light angle monitoring system 700 for monitoring the angle of light incident on the head-up display device 300. Optionally, the light angle monitoring system 700 is located on the side of the head-up display device 300 facing the windshield 200 to facilitate identifying the light incident angle.

[0060] When the included angle β between the incident light monitored by the light angle monitoring system 700 and the plane where the head-up display device 300 is located meets 60° ≤ β ≤ 90°, at this time, the light incident on the head-up display device 300 is close to direct light, and more of this light will directly irradiate on the display screen of the head-up display device 300, which is more likely to damage the optical devices of the head-up display device 300. At this time, the number of electrode groups 20 that generate an electric field on the light-shielding film 10 can be set to be greater than the number of electrode groups 20 that generate an electric field when the included angle β between the incident light monitored by the light angle monitoring system 700 and the plane where the head-up display device 300 is located meets 0° < β < 60°. When the included angle β between the incident light monitored by the light angle monitoring system 700 and the plane where the head-up display device 300 is located meets 0° < β < 60°, the light generally irradiates the head-up display device 300 obliquely, and part of the light will irradiate on the side wall of the head-up display device 300, having a smaller impact on the head-up display device 300. Therefore, the number of electrode groups 20 that are turned on in the light-shielding film 10 at this time can be appropriately reduced, which is beneficial to turning on different electrode groups 20 at different times and improving the service life of the light-shielding system 100.

[0061] Figure 16 It is a working schematic diagram of another main control module provided by the embodiment of the present application.

[0062] In an embodiment of the present application, as Figure 16 shown, the light-shielding system 100 further includes a main control module 100A, and the main control module 100A includes: A storage module SET1 including the coordinates of multiple first electrodes 20A.

[0063] A storage module SET2 including the coordinates of multiple second electrodes 20B.

[0064] A human eye coordinate receiving module 500A, and the human eye tracking system 500 sends the human eye coordinate 501 information to the human eye coordinate receiving module 500A.

[0065] Among them, optionally, continue to refer to Figure 1As shown, the first electrode 20A, the second electrode 20B, and the human eye coordinates can be in the same coordinate system, and the coordinate axes can be three-dimensional coordinate axes or two-dimensional coordinate axes, improving the recognition accuracy of the shading system 100 for the three coordinates. The main control module 100A can be used to determine the first electrode 20A and the second electrode 20B that are in a straight line with the human eye coordinates based on the human eye coordinates, and turn on the first electrode 20A and the second electrode 20B at the corresponding coordinate positions to form an electric field.

[0066] An embodiment of the present application provides a head-up display device 300. Continuing to refer to Figure 1 As shown, the head-up display device 300 applies the shading system 100 provided in the above embodiment to prevent the head-up display device 300 from being damaged due to an increase in temperature caused by being irradiated by a large amount of light.

[0067] It can be seen from the above embodiments that a shading system and a head-up display device provided by the present application at least achieve the following beneficial effects: The shading system provided by the present application is used to block light from entering the head-up display device through the windshield; the shading system includes: a shading film located on the windshield; the shading film includes a plurality of electrode groups and electrochromic materials; the electrode group includes at least one first electrode and at least one second electrode, the first electrode and the second electrode both extend along a first direction, and the first electrode and the second electrode are respectively located on opposite sides in the direction perpendicular to the plane of the shading film, and the first direction is parallel to the plane of the shading film. The shading system further includes a human eye tracking system for real-time identification of human eye coordinates. In the aspect of the shading system provided by the present application for blocking light and in combination with the application of blocking sunlight from entering the head-up display device in the car through the windshield, a shading film and a human eye tracking system are provided in the shading system. The provided shading film includes electrochromic materials and is provided with a plurality of electrode groups in cooperation. When the electrode group is energized, ions in the electrochromic materials can be aggregated to the electric field region, so as to form a light-shielding surface composed of electrochromic materials in the electric field region. The formed light-shielding surface extends in the direction from the first electrode to the second electrode. There is a light-shielding surface on the windshield that intersects at least part of the sunlight incident direction, which is beneficial to ensuring that at least part of the sunlight is blocked by the light-shielding surface, thereby reducing the amount of light entering the car interior. Furthermore, it is beneficial to reduce the light illumination impact of sunlight on the head-up display device, reduce the risk of damage to the head-up display device by high temperature, and is also beneficial to reducing the risk that the light directly irradiates the display screen of the head-up display device or irradiates the human eye and affects driving safety, improving the safety during driving. And, a human eye tracking system is also provided in the shading system, which is beneficial to using the human eye tracking system to identify the position of the human eye, so that the switching conditions of the plurality of electrode groups in the shading film can be adjusted according to the position of the human eye, which is beneficial to more scientifically adjusting factors such as the number of switched-on electrode groups or the switched-on area, improving the usability and light-shielding effect of the shading system.

[0068] The foregoing are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A light-shielding system, characterized in that, For blocking light from entering a head-up display device through a windshield; The light-shielding system includes: A light-shielding film located on the windshield; the light-shielding film includes a plurality of electrode groups and an electro-deformable material; each electrode group includes at least one first electrode and at least one second electrode, the first electrode and the second electrode both extend in a first direction, and the first electrode and the second electrode are respectively located on opposite sides in a direction perpendicular to the plane of the light-shielding film, and the first direction is parallel to the plane of the light-shielding film; An eye-tracking system for real-time identification of eye coordinates.

2. The light-shielding system according to claim 1, wherein The electro-deformable material is an electrochromic material or an electro-optical effect material, and the electro-optical effect material can change at least part of the light path passing through the windshield.

3. The light-shielding system according to claim 1, wherein A light-shielding film electric field is formed between the first electrode and the second electrode; wherein, at least part of the light-shielding film electric field is parallel to the line of sight of the human eye facing one side of the windshield.

4. The light-shielding system according to claim 3, wherein Along a direction parallel to the plane of the light-shielding film and perpendicular to the extension directions of the first electrode and the second electrode, the widths of the first electrode and the second electrode are between 10 nm and 50 nm.

5. The light-shielding system according to claim 1, wherein Each electrode group includes one first electrode and N second electrodes, N≥2; the first electrode is located on the side of the light-shielding film facing the human eye; the plurality of second electrodes in the same electrode group are arranged in a second direction, and the second direction is parallel to the plane of the light-shielding film and intersects with the first direction; Wherein, in the same electrode group, an electric field is formed between the first electrode and one of the N second electrodes at the same moment.

6. The light-shielding system according to claim 5, characterized in that The plurality of second electrodes in the same electrode group are not electrically connected.

7. The light-shielding system according to claim 5, characterized in that In the same electrode group, the angles formed between the electric fields formed between two adjacent second electrodes and the first electrode and the windshield respectively differ by α, 0°<α≤10°.

8. The light-shielding system according to claim 5, wherein, Along a direction perpendicular to the plane of the light-shielding film, the thickness of the light-shielding film is h; in the second direction, the distance between two adjacent first electrodes is d; Wherein, 0.73h≤d≤4.73h.

9. The light-shielding system according to claim 5, wherein Along the second direction, in the area of the light-shielding film closer to the head-up display device, the density of the first electrodes is smaller.

10. The light-shielding system according to claim 5, characterized in that The plurality of first electrodes extend in the first direction and are arranged in the second direction; the plurality of second electrodes extend in the first direction and are arranged in the second direction.

11. The light-shielding system according to claim 5, wherein The plurality of first electrodes extend in the first direction and are arranged in the first direction and the second direction; the plurality of second electrodes extend in the first direction and are arranged in the first direction and the second direction.

12. The light-shielding system according to claim 10 or 11, characterized in that, The light-shielding film includes at least a first region and a second region adjacent in the first direction and / or the second direction, and the number of the electrode groups turned on in the first region and the second region is different.

13. The light-shielding system according to claim 1, wherein, The light-shielding system further includes a temperature adjustment system for monitoring the temperature of the head-up display device; when the temperature adjustment system detects that the temperature of the head-up display device is greater than or equal to a preset temperature, at least part of the electrode groups are turned on to generate an electric field.

14. The light-shielding system according to claim 1, wherein, The light-shielding system further includes a light angle monitoring system for the light incident on the head-up display device; When the included angle β between the incident light monitored by the light angle monitoring system and the plane where the head-up display device is located meets 60° ≤ β ≤ 90°, the number of the electrode groups generating an electric field is greater than the number of the electrode groups generating an electric field when the included angle β between the incident light monitored by the light angle monitoring system and the plane where the head-up display device is located is within the range of 0° < β < 60°.

15. The light-shielding system according to claim 1, characterized in that The light-shielding system further includes a main control module, and the main control module includes: a storage module including a plurality of the first electrode coordinates; a storage module including a plurality of the second electrode coordinates; a human eye coordinate receiving module, and the human eye tracking system sends the human eye coordinate information to the human eye coordinate receiving module; Wherein, the main control module can be used to determine the first electrode and the second electrode that are in a straight line with the human eye coordinates according to the human eye coordinates, and turn on the corresponding first electrode and the second electrode to form an electric field.

16. A head-up display device applying the light-shielding system according to any one of claims 1-15.

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