A backlight assembly, a display, a head-up display system, and a vehicle

Abstract

The application discloses a backlight assembly, a display, a head-up display system and a vehicle, relates to the technical field of vehicles, and aims to solve the problem of how to improve the brightness uniformity of an existing backlight assembly. The backlight assembly comprises a first light source assembly, a first lens, a second light source assembly and a second lens, the first light source assembly comprises a plurality of first light sources arranged in an array, the first lens is located on the light-emitting side of the plurality of first light sources, and the first lens comprises a plurality of light dispersing portions respectively corresponding to the plurality of first light sources. The second light source assembly is located on the side of the first light source assembly opposite to the first lens or between the first light source assembly and the first lens, the second light source assembly comprises a second light source, the second lens is mounted on the first lens and located between adjacent ones of the plurality of light dispersing portions, and the second lens is located on the light-emitting side of the second light source to disperse the light rays of the second light source.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a backlight assembly, a display, a head-up display system, and a vehicle. Background Technology

[0002] The backlight assembly is used to provide brightness to the display, ensuring that images can be displayed properly on the display.

[0003] In the prior art, the lens of the backlight assembly is provided with multiple diffusers to diffuse the light from the light source in order to improve the brightness of the display.

[0004] However, the light intensity is low between adjacent astigmatic areas of the lens, which can cause dark areas on the display and affect the image quality of the display. Utility Model Content

[0005] The purpose of this application is to provide a backlight assembly, a display, a head-up display system, and a vehicle, aiming to solve the problem of how to improve the brightness uniformity of existing backlight assemblies.

[0006] In a first aspect, a backlight assembly is provided, including a first light source assembly, a first lens, a second light source assembly, and a second lens. The first light source assembly includes a plurality of first light sources arranged in an array. The first lens is located on the light-emitting side of the plurality of first light sources. The first lens includes a plurality of diffusing portions respectively opposite to the plurality of first light sources.

[0007] The second light source assembly is located on the side of the first light source assembly facing away from the first lens, or between the first light source assembly and the first lens. The second light source assembly includes a second light source. The second lens is mounted on the first lens and is located between adjacent astigmatic portions in the plurality of astigmatic portions. The second lens is located on the light-emitting side of the second light source to diffuse the light from the second light source.

[0008] In the above scheme, based on the first light source assembly and the first lens, a second light source assembly and a second lens are added. The second lens is located between adjacent astigmatic portions of the first lens and is located on the light-emitting side of the second light source. After the second light source is powered on and emits light, the second lens can diffuse the light from the second light source, enhance the brightness between adjacent astigmatic portions, and improve the uniformity of brightness in each region.

[0009] Optionally, the second lens includes a diverging portion and a conducting portion, the diverging portion being located between the adjacent astigmatic portions, and the conducting portion being connected between the diverging portion and the second light source assembly.

[0010] Optionally, the end of the conductive portion away from the divergent portion is provided with a receiving cavity, and the second light source is housed in the receiving cavity.

[0011] Optionally, the outer peripheral surface of the conductive part is provided with a coating, which is used to block and reflect light.

[0012] Optionally, the surface of the diverging portion away from the conducting portion is a convex spherical surface; and / or, the conducting portion is a cone-shaped body, with the larger diameter end of the conducting portion facing the diverging portion and the smaller diameter end of the conducting portion facing the second light source.

[0013] Optionally, the first lens has a through hole located between the plurality of astigmatic portions, and the second lens passes through the through hole.

[0014] Optionally, there may be multiple second light sources and multiple second lenses, with each of the multiple second lenses located on the light-emitting side of the multiple second light sources.

[0015] Optionally, the plurality of astigmatic portions are arranged in a rectangular array, and the plurality of second lenses are respectively located between four adjacent astigmatic portions.

[0016] Secondly, a display is provided, including a backlight assembly.

[0017] Thirdly, a head-up display system is provided, including a display.

[0018] Fourthly, a vehicle is provided, including a head-up display system, or a display.

[0019] It should be noted that the technical effects brought about by the implementation methods of the second, third and fourth aspects of this application can be referred to the technical effects brought about by the corresponding implementation methods of the first aspect, and will not be repeated here. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of this application; Figure 2 for Figure 1 The diagram shows the working principle of the head-up display system in the vehicle shown. Figure 3 for Figure 2 The diagram shows the structure of the display in the head-up display system. Figure 4 for Figure 3 The diagram shows the structure of the backlight assembly in the display. Figure 5 for Figure 4 A schematic diagram of the structure of the first light source component and the first lens in the backlight assembly shown in the first viewing angle; Figure 6 for Figure 4 A schematic diagram of the structure of the first light source assembly and the first lens in the backlight assembly shown in the second view. Figure 7 for Figure 4 A schematic diagram of the structure of the second light source component and the second lens in the backlight assembly shown in the first viewing angle; Figure 8 for Figure 4 The diagram shows the structure of the second light source component and the second lens in the backlight assembly from a second viewing angle.

[0022] Figure label: 1000, vehicles; 100. Body; 200. Wheels; 300. Windshield; 10. Display; 20. First freeform surface lens; 30. Second freeform surface lens; 1. Backlight assembly; 11. First light source assembly; 111. First light source; 112. First circuit board; 112a. Light transmission hole; 12. First lens; 121. Diffusion section; 122. Through hole; 13. Second light source assembly; 131. Second light source; 132. Second circuit board; 14. Second lens; 141. Diffusion section; 142. Conducting section; 2. LCD bracket; 3. Compound eye lens; 4. Light guide; 5. Polarizer; 6. Light homogenizer; 7. TFT screen; 8. Ribbon cable. Detailed Implementation

[0023] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.

[0024] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0025] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0026] In the embodiments of this application, "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, where the range of similarity is within an acceptable deviation range, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, where the acceptable deviation range for approximate equality can be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0027] This application provides a vehicle 1000, which can be a pure gasoline vehicle, a pure electric vehicle, a hybrid electric vehicle, etc. The vehicle 1000 can also be a sedan, bus, truck, trailer, etc. This application does not specifically limit the type of vehicle 1000.

[0028] In some embodiments, see Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of this application. The vehicle 1000 includes a body 100 and wheels 200. The wheels 200 are connected to the lower part of the body 100, and the body 100 is moved by the rotation of the wheels 200.

[0029] In some embodiments, see Figure 1 and Figure 2The vehicle 1000 may also include a head-up display system. For example, the head-up display system can be installed on the top of the dashboard of the vehicle 1000, and navigation information, vehicle speed information, etc. can be projected onto the windshield 300 of the vehicle 1000 through the head-up display system, so that the driver can obtain relevant information by looking at the windshield 300 of the vehicle 1000 without having to look down at the instrument panel or screen, thus avoiding the risk of accidents caused by taking one's eyes off the road.

[0030] For example, the head-up display system includes a display 10, a first freeform surface lens 20, and a second freeform surface lens 30. The display 10 is installed inside the HUD (Head-Up Display) housing and is used to emit an image source. Light emitted from the display 10 is emitted through the first freeform surface lens 20 and the second freeform surface lens 30 and projected onto the windshield 300 of the vehicle 1000. The light then undergoes refraction and reflection along the windshield 300, and the reflected light enters the driver's eyes, allowing the driver to observe a virtual image formed in front of the windshield 300.

[0031] It should be noted that the head-up display system can be installed not only in vehicles, but also in other equipment. For example, it can be installed in wind turbines, ships, etc.

[0032] In some embodiments, see Figure 1 , Figure 2 and Figure 3 The head-up display system includes a display 10. The display 10 includes a backlight assembly 1, an LCD bracket 2 (Liquid Crystal Display), a compound eye lens 3, a light guide 4, a polarizer 5, a light homogenizer 6, a TFT screen 7 (Thin Film Transistor), and a ribbon cable 8. The backlight assembly 1 is connected to one side of the LCD bracket 2, and the compound eye lens 3 is connected to the other side of the LCD bracket 2. The side of the LCD bracket 2 opposite to the backlight assembly 1 is connected to the light guide 4, which contains the polarizer 5 and the light homogenizer 6. The side of the light guide 4 opposite to the backlight assembly 1 is connected to the TFT screen 7, which receives power and transmits signals via the ribbon cable 8.

[0033] In the above scheme, the backlight assembly 1 provides backlight for the display 10. The light emitted by the backlight assembly 1 enters the compound eye lens 3. The compound eye lens 3 has a dense array of rectangular convex lenses, which can more finely homogenize and constrain the passing light, making the light more uniform. The light passing through the compound eye lens 3 further reaches the polarizer 5. Since there are two directions of light, P-ray and S-ray, the polarizer 5 can filter out the light in one direction, thereby reducing the brightness of the light. After passing through the polarizer 5, the light reaches the homogenizer 6, which can further homogenize the light.

[0034] The light emitted by the backlight assembly 1, after being optimized by the aforementioned components, presents as uniform light in one direction. This light is then projected onto the TFT screen 7, where thin-film transistors are arranged in a specific configuration according to the input. After the light passes through the screen, a predetermined image is formed.

[0035] For example, the backlight assembly 1 can be connected to the light guide 4 by fasteners such as screws, the compound eye lens 3 can be connected to the LCD bracket 2 by adhesive bonding, and the polarizer 5, the light diffuser 6 and the light guide 4 can be connected by adhesive bonding.

[0036] It should be noted that the display 10 can be installed not only in a head-up display system, but also in other systems. For example, it can be installed in a reversing system.

[0037] In some implementations, see Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 The backlight assembly 1 includes a first light source assembly 11, a first lens 12, a second light source assembly 13, and a second lens 14. The first light source assembly 11 includes a plurality of first light sources 111 arranged in an array. The first lens 12 is located on the light-emitting side of the plurality of first light sources 111. The first lens 12 includes a plurality of scattering portions 121 that are respectively opposite to the plurality of first light sources 111.

[0038] The second light source assembly 13 is located on the side of the first light source assembly 11 that is away from the first lens 12, or between the first light source assembly 11 and the first lens 12. The second light source assembly 13 includes a second light source 131. The second lens 14 is mounted on the first lens 12 and is located between adjacent astigmatic portions 121. The second lens 14 is located on the light-emitting side of the second light source 131 to diffuse the light from the second light source 131.

[0039] In the above scheme, based on the first light source assembly 11 and the first lens 12, a second light source assembly 13 and a second lens 14 are added. The second lens 14 is located between adjacent astigmatic portions 121 of the first lens 12 and is located on the light-emitting side of the second light source 131. After the second light source 131 is powered on and emits light, the second lens 14 can diffuse the light from the second light source 131, enhance the brightness between adjacent astigmatic portions 121, and improve the uniformity of brightness in each area.

[0040] It should be noted that the existing backlight assembly 1 includes a first light source assembly 11 and a first lens 12. This application upgrades the structure of the existing backlight assembly 1 by adding a second light source assembly 13 and a second lens 14, which can save on research and development costs.

[0041] In some examples, the first light source assembly 11 includes a plurality of first light sources 111 and a first circuit board 112, with the plurality of first light sources 111 arranged in an array corresponding to a plurality of scattering sections 121 on the first circuit board 112. The light generated by the first light sources 111 can be diffused outward through the plurality of scattering sections 121 of the first lens 12.

[0042] In other examples, the first light source assembly 11 includes a first light source 111 and a plurality of first circuit boards 112, each of which is disposed on a portion of the plurality of first light sources 111.

[0043] In some examples, the second light source assembly 13 includes one or more second light sources 131 and a second circuit board 132, with the second light source 131 connected to the second circuit board 132.

[0044] In other examples, the second light source assembly 13 may include a plurality of second light sources 131 and a plurality of second circuit boards 132, with a portion of the plurality of second light sources 131 disposed on each second circuit board 132.

[0045] In some examples, the second light source assembly 13 is located on the side of the first light source assembly 11 that is away from the first lens 12. In this case, multiple light-transmitting holes 112a can be provided on the circuit board of the first light source assembly 11 corresponding to the second light source 131, and the second lens 14 diffuses the light from the second light source 131 through the light-transmitting holes 112a.

[0046] In other examples, the second light source assembly 13 is located between the first light source assembly 11 and the first lens 12. In this case, the second light source assembly 13 can have one or more second circuit boards 132. When the second light source assembly 13 has one second circuit board 132, a light-transmitting hole 112a can be provided on the second circuit board 132 corresponding to the position of the first light source 111, so that the light from the first light source 111 can illuminate the first lens 12. When the second light source assembly 13 has multiple second circuit boards 132, the multiple second circuit boards 132 can be arranged at intervals to avoid the position of the first light source 111.

[0047] In some examples, the second circuit board 132 of the second light source assembly 13 and the first circuit board 112 of the first light source assembly 11 can be connected by adhesive or by screws or other components.

[0048] In some examples, the first light source 111 and the second light source 131 can be LED beads.

[0049] In some other embodiments, the first light source 111 and the second light source 131 may be incandescent lamps.

[0050] In some examples, the second lens 14 is bonded to the first lens 12.

[0051] In other examples, the second lens 14 may be fixedly connected to the second circuit board 132 of the second light source assembly 13.

[0052] In some examples, the astigmatic portion 121 of the first lens 12 can be a spherical protrusion.

[0053] In other examples, the astigmatic portion 121 of the first lens 12 can be a Fresnel lens structure.

[0054] In some examples, the number of first light sources 111 is the same as the number of astigmatism sections 121, and the number of second light sources 131 is the same as the number of second lenses 14. In this way, a single astigmatism section 121 can be provided with light by a single first light source 111, and a single second lens 14 can be provided with light by a single second light source 131, thus avoiding the phenomenon of light spots in the image.

[0055] To improve the display quality, partitions can be provided between the multiple diffuser sections 121 and between the diffuser section 121 and the second lens 14. This reduces light interference between diffuser sections 121 and between diffuser sections 121 and the second lens 14. By controlling the power supply to and from the first light source 111 and the second light source 131, the brightness and darkness of local areas of the display 10 can be adjusted.

[0056] In some implementations, see Figure 4 , Figure 7 and Figure 8 The second lens 14 includes a diverging portion 141 and a conducting portion 142. The diverging portion 141 is located between several adjacent astigmatic portions 121, and the conducting portion 142 is connected between the diverging portion 141 and the second light source assembly 13.

[0057] In the above scheme, the conducting part 142 is connected between the radiating part 141 and the second light source assembly 13. In this way, the light from the second light source 131 can be transmitted to the radiating part 141 through the conducting part 142, which can reduce light scattering, reduce brightness loss, and improve the brightness of the radiating part 141.

[0058] In some examples, the diverging part 141 and the conducting part 142 are an integral structure.

[0059] In other examples, the diverging part 141 and the conducting part 142 are separate structures, and the diverging part 141 and the conducting part 142 can be connected by means of bonding or other methods.

[0060] In some implementations, see Figure 7 and Figure 8The conducting part 142 has a receiving cavity at one end away from the dispersing part 141, and the second light source 131 is housed in the receiving cavity.

[0061] In the above scheme, the conducting part 142 is disposed in the receiving cavity, and the second light source 131 is housed in the receiving cavity, which can further reduce the brightness loss of the second light source 131 and improve the brightness of the radiating part 141.

[0062] In some examples, the receiving cavity can be a cylindrical receiving cavity.

[0063] In other examples, the receiving cavity can be square, semi-circular, etc.

[0064] In some implementations, see Figure 7 and Figure 8 The outer peripheral surface of the conductive part 142 is provided with a coating, which is used to block and reflect light.

[0065] In the above solution, after the outer peripheral surface of the conductive part 142 is coated, the light can be prevented from scattering along the outer peripheral surface of the conductive part 142 and the light can be reflected, thereby increasing the brightness of the scattering part 141.

[0066] In some examples, the coating may be a silver coating.

[0067] In other examples, the coating may be other metallic or non-metallic coatings that can block and reflect light, such as copper coatings.

[0068] In some implementations, see Figure 7 and Figure 8 The surface of the diverging part 141 that is away from the conducting part 142 is a convex spherical surface; and / or, the conducting part 142 is a cone-shaped body, with the larger diameter end of the conducting part 142 facing the diverging part 141 and the smaller diameter end of the conducting part 142 facing the second light source 131.

[0069] In the above scheme, the surface of the diverging part 141 away from the conducting part 142 is a convex spherical surface. The convex spherical surface can converge and change the direction of light. After the light from the second light source 131 passes through the convex spherical surface, it can change from random light to light shining in the same direction, thereby improving the brightness of the diverging part 141.

[0070] The conductive part 142 is disposed in the cone-shaped body. The cone-shaped structure can focus light to multiple points on the optical axis to form a non-diffractive beam. Its light intensity distribution remains unchanged along the propagation direction, thereby improving the brightness of the diverging part 141.

[0071] In some other embodiments, the diverging portion 141 may be a Fresnel lens.

[0072] In some other embodiments, the structure of the conductive part 142 can be a cylinder.

[0073] In some implementations, see Figure 4 , Figure 5 and Figure 6 The first lens 12 is provided with a through hole 122 located between multiple astigmatic sections 121, and the second lens 14 passes through the through hole 122.

[0074] In the above scheme, a through hole 122 is provided at the position of the first lens 12 between multiple astigmatic sections 121, and the second lens 14 passes through the through hole 122 and is connected to the first lens 12. The structure is simple and easy to process.

[0075] In some examples, the inner surface of the through-hole 122 is coated to reduce light loss from the first lens 12. The coating may be a silver coating.

[0076] In some examples, the first lens 12 is provided with a plurality of through holes 122 through which a second lens 14 passes.

[0077] In some examples, the second lens 14 is bonded to the inner surface of the through-hole 122 of the first lens 12.

[0078] In some implementations, see Figure 4 , Figure 7 and Figure 8 There are multiple second light sources 131 and multiple second lenses 14, with the multiple second lenses 14 located on the light-emitting side of the multiple second light sources 131 respectively.

[0079] In the above scheme, the uniformity of the brightness of the backlight assembly 1 is improved by cooperating with multiple second lenses 14 and multiple second light sources 131.

[0080] In some examples, the number of second light sources 131 and second lenses 14 is the same, which can be 2, 3, 4, 5, etc.

[0081] In some other embodiments, the number of the second light source 131 and the second lens 14 may be one.

[0082] In some implementations, see Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 Multiple astigmatic sections 121 are arranged in a rectangular array, and multiple second lenses 14 are located between four adjacent astigmatic sections 121.

[0083] In the above scheme, a second lens 14 is provided between every four adjacent astigmatism sections 121 to improve the uniformity of the brightness of the backlight assembly 1.

[0084] In some examples, the number of second lenses 14 and second light sources 131 can be determined based on the number and arrangement of the astigmatic portions 121. For instance, if multiple astigmatic portions 121 are arranged in a rectangular array, for example, if there are 12 astigmatic portions 121 arranged in a 3×4 rectangular array, and the area between four adjacent astigmatic portions 121 is 6, then 6 second light sources 131 and 6 second lenses 14 can be provided.

[0085] In some other embodiments, the astigmatic portions 121 in two adjacent rows or columns can be arranged alternately. In this case, the area between three adjacent astigmatic portions 121 will form a dark area, and the second lens 14 can be disposed between the three adjacent astigmatic portions 121.

[0086] In the description of the embodiments of this application, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0087] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A backlight assembly, characterized in that, It includes a first light source assembly (11), a first lens (12), a second light source assembly (13), and a second lens (14). The first light source assembly (11) includes a plurality of first light sources (111) arranged in an array. The first lens (12) is located on the light-emitting side of the plurality of first light sources (111). The first lens (12) includes a plurality of scattering portions (121) that are respectively opposite to the plurality of first light sources (111). The second light source assembly (13) is located on the side of the first light source assembly (11) facing away from the first lens (12), or between the first light source assembly (11) and the first lens (12). The second light source assembly (13) includes a second light source (131). The second lens (14) is mounted on the first lens (12) and is located between adjacent astigmatic portions (121) among the plurality of astigmatic portions (121). The second lens (14) is located on the light-emitting side of the second light source (131) to diffuse the light of the second light source (131).

2. The backlight assembly according to claim 1, characterized in that, The second lens (14) includes a diverging part (141) and a conducting part (142). The diverging part (141) is located between the adjacent astigmatic parts (121), and the conducting part (142) is connected between the diverging part (141) and the second light source assembly (13).

3. The backlight assembly according to claim 2, characterized in that, The conductive part (142) has a receiving cavity at one end away from the diverging part (141), and the second light source (131) is housed in the receiving cavity.

4. The backlight assembly according to claim 2, characterized in that, The outer peripheral surface of the conductive part (142) is provided with a coating, which is used to block and reflect light.

5. The backlight assembly according to claim 2, characterized in that, The surface of the diverging part (141) that is away from the conducting part (142) is a convex spherical surface; And / or, the conductive part (142) is a cone-shaped body, with the larger diameter end of the conductive part (142) facing the diverging part (141) and the smaller diameter end of the conductive part (142) facing the second light source (131).

6. The backlight assembly according to claim 2, characterized in that, The first lens (12) has a through hole (122) located between the plurality of astigmatic portions (121), and the second lens (14) passes through the through hole (122). And / or, the number of the second light source (131) is multiple, the number of the second lens (14) is multiple, and the multiple second lenses (14) are respectively located on the light-emitting side of the multiple second light sources (131).

7. The backlight assembly according to claim 6, characterized in that, The multiple astigmatic elements (121) are arranged in a rectangular array, and the multiple second lenses (14) are located between four adjacent astigmatic elements (121).

8. A display, characterized in that, Includes the backlight assembly (1) according to any one of claims 1-7.

9. A head-up display system, characterized in that, Includes the display (10) as described in claim 8.

10. A vehicle, characterized in that, Includes the head-up display system of claim 9, or the display (10) of claim 8.

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