Head-up display system

Abstract

The application relates to a head-up display system. The head-up display system comprises a backlight module, an optical element combination and a liquid crystal display panel. The backlight module comprises a substrate and a plurality of light source devices, the plurality of light source devices are arranged on the substrate in a spaced manner, each light source device comprises a base, a light emitting chip and a condenser lens, the condenser lens is sealingly arranged on the base and encloses a cavity, and the light emitting chip is arranged on the base and located in the cavity. The liquid crystal display panel is arranged corresponding to the backlight module. The optical element combination is arranged between the backlight module and the liquid crystal display panel. By sealingly arranging the condenser lens on the base to enclose the cavity, the condenser lens is integrated, the volume of the condenser lens of the light source device is greatly reduced, the cost is significantly reduced, and the traditional condenser lens sheet of the head-up display system is replaced. Therefore, the head-up display system does not need to be provided with the traditional condenser lens sheet, the thickness is greatly reduced, the structure is simplified, and the cost is obviously reduced.

Description

Technical Field

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

[0002] Traditional head-up display (HUD) systems typically include a TFT (Thin Film Transistor) display panel, an optical component assembly, and a backlight module. The optical component assembly is located between the backlight module and the TFT display panel. The light emitted by the backlight module is processed by the optical component assembly and then shines onto the TFT display panel, thus providing backlight for the TFT display panel.

[0003] The backlight module includes a substrate and multiple light source devices. These devices are densely arranged on the substrate, each containing an LED chip, resulting in a Lambertian light emission distribution. The optical component assembly includes a condenser lens and a light distributor arranged sequentially. The condenser lens corresponds to the backlight module and has multiple condenser lenses, each corresponding to one of the light source devices to focus and concentrate the light emitted by that device. To collect more light into the condenser lenses, the light-incident surface of the condenser lenses is designed to be very large, resulting in a large size and high cost. Summary of the Invention

[0004] Therefore, it is necessary to provide a head-up display system that addresses the issues of large size and high cost of the focusing lens in traditional head-up display systems.

[0005] A head-up display system, comprising:

[0006] A backlight module, the backlight module including a substrate and a plurality of light source devices, the plurality of light source devices being spaced apart on the substrate, each light source device including a substrate, at least one light-emitting chip and a condensing lens, the condensing lens being sealed on the substrate and forming a cavity, the light-emitting chip being disposed on the substrate and located in the cavity;

[0007] A liquid crystal display panel, wherein the liquid crystal display panel is disposed corresponding to the backlight module; and

[0008] An optical element assembly is disposed between the backlight module and the liquid crystal display panel.

[0009] In one embodiment, the optical element assembly includes a light distribution element, which is configured corresponding to the backlight module; one side surface of the light distribution element is provided with a plurality of optical sections, which are configured one-to-one with the plurality of light source devices, adjacent optical sections are connected, and each optical section is used for focusing light.

[0010] In one embodiment, the light-incident surface of each optical element is disposed facing the backlight module; each light source device is used to project a light spot covering the light-incident surface of the corresponding optical element.

[0011] In one embodiment, the light-incident surface of each optical element is a convex curved surface.

[0012] In one embodiment, the light-emitting surface of the condenser lens is a convex arc surface; the light-incident surface of each optical element is an arc surface, and the curvature is less than the curvature of the light-emitting surface of the corresponding condenser lens.

[0013] In one embodiment, the orthographic projection of the light incident surface of each optical element onto one side surface of the light distributor is rectangular; each light source device is used to project a light spot adapted to the orthographic projection.

[0014] In one embodiment, each of the optical components is a Fresnel lens structure.

[0015] In one embodiment, the emission angle of each of the light source devices is θ, where 10° < θ ≤ 50°.

[0016] In one embodiment, each of the light source devices further includes a wavelength conversion layer that covers at least the front side of all the light-emitting chips.

[0017] In one embodiment, the distance from the display surface of the liquid crystal display panel to the back surface of the substrate is D, wherein 20mm≤D≤45mm.

[0018] In the aforementioned head-up display system, the light source device of the backlight module is an integrated lens light source. By sealing the condenser lens on the substrate and enclosing it to form a cavity, the light-emitting chip is placed inside the cavity. The condenser lens is integrated. Compared with the split condenser lens design of traditional head-up display systems, the volume of the condenser lens of the light source device in this application is greatly reduced, the cost is significantly reduced, and it replaces the condenser lens sheet of traditional head-up display systems. Therefore, the head-up display system in this application does not need to set the traditional condenser lens sheet, which greatly reduces the thickness, simplifies the structure, and significantly reduces the cost.

[0019] Furthermore, due to the integrated design and small size of the condenser lens of the light source device in this application, under the premise of the same distance between the substrate and the light distribution component of the backlight module, the distance between the condenser lens and the light distribution component of the light source device in this application is much greater than that of the condenser lens and the light distribution component in a traditional head-up display system. When the light emitted from the condenser lens of the light source device is emitted at a preset angle, it travels a greater distance and can cover a larger area on the light distribution component. That is, the light spot projected by the light source device of this application on the light distribution component is much larger than the light spot projected by the condenser lens of a traditional head-up display system on the light distribution component. Therefore, compared with the dense arrangement of light source devices in a traditional head-up display system, the head-up display system of this application can significantly reduce the number of light source devices and increase the spacing between adjacent light source devices without the need for dense arrangement of light source devices, further reducing costs. At the same time, the condenser lens of the light source device is thin, and its light loss is much less than that of the condenser lens in a traditional head-up display system, resulting in a higher brightness of the light spot projected by the light source device on the light distribution component, thereby improving the brightness of the liquid crystal display panel and reducing power consumption. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a head-up display system according to one embodiment of this application.

[0021] Figure 2 for Figure 1 A magnified view of region A in the middle.

[0022] Figure 3 for Figure 1 A partial structural diagram of the light distribution component of a head-up display system from a certain angle.

[0023] Figure 4 for Figure 1 A partial structural diagram of the light distribution component of a head-up display system from another perspective.

[0024] Figure 5 This is a schematic diagram of a head-up display system in another embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100-Head-up display system; 110-Backlight module; 111-Substrate; 112-Light source device; 113-Substrate; 114-Light-emitting chip; 115-Condensing lens; 116-Cavity; 117-Groove; 118-Wavelength conversion layer; 120-Optical component assembly; 122-Light distribution component; 124-Optical part; 126-Protruding structure; 128-Diffuser; 130-Liquid crystal display panel. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0033] Please see Figure 1 and Figure 2 , Figure 1 A schematic diagram of a head-up display system according to an embodiment of this application is shown. Figure 2 It shows Figure 1 An enlarged view of region A shows a head-up display system 100 provided in one embodiment of this application, including a backlight module 110, an optical element assembly 120, and a liquid crystal display panel 130. The backlight module 110 includes a substrate 111 and a plurality of light source devices 112, which are spaced apart on the substrate 111. Each light source device 112 includes a substrate 113, at least one light-emitting chip 114, and a condenser lens 115. The condenser lens 115 is sealed to the substrate 113 and forms a cavity 116. The light-emitting chip 114 is disposed on the substrate 113 and located within the cavity 116. The liquid crystal display panel 130 is disposed corresponding to the backlight module 110. The optical element assembly 120 is disposed between the backlight module 110 and the liquid crystal display panel 130.

[0034] Since the light source device 112 of the backlight module 110 is an integrated lens light source, the condenser lens 115 is sealed on the substrate 113 to form a cavity 116, and the light-emitting chip 114 is disposed in the cavity 116. The condenser lens 115 is integrated. Compared with the separate condenser lens design of the traditional head-up display system, the volume of the condenser lens 115 of the light source device 112 is greatly reduced, the cost is significantly reduced, and it replaces the condenser lens sheet of the traditional head-up display system. Therefore, the head-up display system 100 does not need to set the traditional separate condenser lens sheet, which greatly reduces the thickness, simplifies the structure, and significantly reduces the cost.

[0035] In the backlight module 110, the substrate 111 can be a plate with circuitry (not shown), which not only serves to support the light source device 112, but also allows the light source device 112 to be electrically connected to external circuitry through the circuitry. The material of the plate can be, but is not limited to, glass, resin, ceramic, or metal. In this embodiment, the substrate 111 can be, but is not limited to, a circuit board.

[0036] The substrate 113 of the light source device 112 is a support, and the support has a groove 117, which forms at least a portion of the cavity 116. The light-emitting chip 114 is disposed on the bottom of the groove 117. In other embodiments, the substrate 113 may be a flat plate structure, and the condenser lens 115 includes a support portion (not shown) and a lens portion (not shown). One end of the support portion is connected to the lens portion to form a cavity, and the other end is sealed and connected to the flat plate structure. The light-emitting chip 114 is disposed on the flat plate structure.

[0037] The light-emitting chip 114 can be, but is not limited to, an LED chip. The number of LED chips can be set according to actual needs. The LED chips can be vertical chips or flip chips. In this embodiment, only one LED chip is provided in the substrate 113, and it is a vertical chip. Its front electrode is connected to the pads (not shown) of the substrate 113 through bonding wires (not shown). In other embodiments, three LED chips can be provided in the substrate 113, namely a red LED chip, a green LED chip, and a blue LED chip. The light emitted by the three chips is mixed to output white light.

[0038] Each light source device 112 also includes a wavelength conversion layer 118, which covers at least the front side of all light-emitting chips 114 and converts the color of the light-emitting chips 114. In this embodiment, the wavelength conversion layer 118 is a phosphor layer that covers only the front side of the blue LED chip and converts blue light into white light. In other embodiments, the wavelength conversion layer 118 may cover both the front and sides of all light-emitting chips 114; or, a white adhesive layer may be provided on the bottom of the groove 117, covering the sides of the light-emitting chips 114 and the remaining surface of the groove bottom.

[0039] The back of the condenser lens 115 is flat and is sealed to the front of the bracket with adhesive. The groove 117 of the bracket forms the entire cavity 116. The light-incident surface of the condenser lens 115 is also flat. The light-exiting surface of the condenser lens 115 is convex, thus concentrating the light and improving the brightness of the light spot. It replaces the bulky condenser lens of traditional head-up display systems, significantly reducing its volume and cost. In an alternative embodiment, the light-incident surface of the condenser lens 115 can be set to a convex shape according to actual needs, forming a biconvex lens with even better light-concentrating effect.

[0040] The emission angle of each light source device 112 is θ, where 10° < θ ≤ 50°. When the light transmission angle of the liquid crystal display panel 130 is ±10° in the horizontal direction (length direction) and ±5° in the vertical direction (width direction), the light emitted by the light source device 112 within this emission angle range is focused by the optical element assembly 120, and the small-angle light rays formed can all pass through the liquid crystal display panel 130. There is no situation where some light rays cannot pass through the liquid crystal display panel 130, thus ensuring the brightness of the liquid crystal display panel 130.

[0041] Furthermore, the emission angle θ of each light source device 112 can be, but is not limited to, 50°, resulting in a large projected light spot area that covers a larger area on the optical element assembly 120. This significantly increases the illumination area on the liquid crystal display panel 130, allowing one light source device 112 to replace at least two light source devices in a traditional head-up display system, thereby significantly reducing costs. In other embodiments, the emission angle θ of each light source device 112 can be 30°, 35°, 40°, 45°, or other angles.

[0042] Please see Figure 3 and Figure 4 Combined Figure 1 , Figure 3 This diagram shows a partial structural schematic of the light distribution component of the head-up display system in this embodiment from a certain viewing angle. Figure 4 A partial structural schematic diagram of the light distribution element of the head-up display system in this embodiment is shown from another viewpoint. The optical element assembly 120 includes a light distribution element 122, which is disposed corresponding to the backlight module 110. A plurality of optical sections 124 are provided on one side surface of the light distribution element 122, and each optical section 124 is disposed in a one-to-one correspondence with a plurality of light source devices 112. Adjacent optical sections 124 are connected. Each optical section 124 is used for light focusing.

[0043] Because the focusing lens 115 of the light source device 112 is integrated and small in size, under the premise that the substrate 111 of the backlight module 110 and the light distribution component 122 are the same distance, the distance between the focusing lens 115 of the light source device 112 and the light distribution component 122 is much greater than the distance between the focusing lens and the light distribution component in a traditional head-up display system. When the light emitted from the focusing lens 115 of the light source device 112 is emitted at a preset angle, it travels a long distance and can cover a larger area on the light distribution component 122. That is, the light spot projected by the light source device 112 on the light distribution component 122 is much larger than the light spot projected by the focusing lens on the light distribution component in a traditional head-up display system. Therefore, compared with the dense arrangement of light source devices in a traditional head-up display system, the head-up display system 100 in this embodiment can significantly reduce the number of light source devices 112 and increase the spacing between adjacent light source devices 112 without the need for dense arrangement of light source devices 112, further reducing costs. Meanwhile, the condenser lens 115 of the light source device 112 is thin, and its light loss is much less than that of the condenser lens of the traditional head-up display system. This makes the brightness of the light spot projected by the light source device 112 on the light distribution component 122 higher, thereby increasing the brightness of the liquid crystal display panel 130 and reducing power consumption.

[0044] Furthermore, the angle between the light beam focused by the optical unit 124 and the optical axis is less than or equal to 10° in the horizontal direction (length direction) and less than or equal to 5° in the vertical direction (width direction). When the light transmission angle of the liquid crystal display panel 130 is ±10° in the horizontal direction (length direction) and ±5° in the vertical direction (width direction), the light beam focused by the optical unit 124 can essentially pass through the liquid crystal display panel 130, thus preventing a significant reduction in the brightness of the liquid crystal display panel 130. It should be noted that the angle between the focused light beam and the optical axis can be achieved by adjusting the positional relationship between the light source device 112 and the focal point of the optical unit 124. For example, when the light emission center of the light source device 112 is located at the focal point of the optical unit 124, the optical unit 124 can collimate or approximately collimate the incident light beam, making the angle between the focused light beam and the optical axis close to 0°.

[0045] Each optical element 124 has its light-incident surface facing the backlight module 110. Each light source device 112 projects a light spot that covers the light-incident surface of the corresponding optical element 124. Each light source device 112 can project a light spot toward the corresponding optical element 124, and the light spot is adapted to the light-incident surface of the optical element 124, thus covering the light-incident surface. At the same time, the optical element 124 can focus the incident light, so that the angle of the light rays that finally hit the liquid crystal display panel 130 is small, and can pass through the liquid crystal display panel 130, avoiding the brightness of the liquid crystal display panel 130 being affected by some light rays not being able to pass through. Moreover, as the light-incident surface of each optical element 124 increases, the light spot of each light source device 112 increases accordingly, and the unit illumination area on the liquid crystal display panel 130 increases, thereby reducing the number of light source devices 112 and reducing costs.

[0046] Each optical element 124 of the light distribution member 122 has a convex curved surface on its incident surface, which can refract and converge incident light rays. Furthermore, the condenser lens 115 has a convex arc surface on its exit surface. The incident surface of each optical element 124 is arc-shaped, and its curvature is less than that of the corresponding condenser lens 115's exit surface. This means that the light-gathering ability of the optical element 124 is weaker than that of the condenser lens 115, satisfying the requirement for secondary light gathering. Simultaneously, the condenser lens 115 has a better light-gathering effect and a higher beam brightness.

[0047] From a projection perspective, the orthographic projection of the light-incident surface of each optical element 124 onto one side surface of the light distributor 122 is rectangular. Each light source device 112 projects a light spot that matches this orthographic projection, meaning the light spot is also rectangular. When the orthographic projection is rectangular, the light spot is also rectangular and matches the orthographic projection. When the orthographic projection is square, the light spot is also square and matches the orthographic projection. Because the orthographic projection is rectangular, adjacent optical elements 124 can be connected to form a sheet, reducing manufacturing difficulty. In other embodiments, the orthographic projection can be of other suitable shapes, and the shape of the light spot is adapted accordingly.

[0048] It should be noted that the light spot projected by each of the light source devices 112 is adapted to the orthographic projection of the light incident surface of the corresponding optical unit 124. This can be understood as the ideal situation where the light spot and the orthographic projection are completely superimposed, but it also includes the case where the light spot is slightly larger or smaller than the orthographic projection. The shape of the light spot can be adjusted by the condenser lens 115. In other embodiments, the shape of the light spot can even be precisely controlled by means of a light-blocking structure provided on the condenser lens 115.

[0049] The other surface of the light distribution element 122 is provided with a plurality of protruding structures 126, which are arranged in an array and adjacent protruding structures 126 are connected. The plurality of protruding structures 126 play a role in light homogenization, improving the uniformity of light emission and making the display surface of the liquid crystal display panel 130 emit light uniformly, avoiding the phenomenon of excessive local light emission. In other embodiments, the plurality of protruding structures 126 can be arranged facing the backlight module 110, while the plurality of optical parts 124 are arranged away from the backlight module 110, and the protruding structures 126 can be replaced by concave structures, which can also achieve the effect of light homogenization.

[0050] The light distribution element 122 is an integral structure, that is, its multiple optical parts 124 and multiple protrusions 126 are integrally formed, for example, it can be integrally formed by injection molding.

[0051] Please combine Figure 1 The optical element assembly 120 also includes a diffuser 128, which is disposed between the light distribution element 122 and the liquid crystal display panel 130. It also plays a role in light uniformity, making the light output more uniform and further improving the uniformity of light emission from the display surface of the liquid crystal display panel 130.

[0052] The liquid crystal display panel 130 can be, but is not limited to, a TFT display panel, and the backlight module 110 provides backlight for it. The distance from the display surface of the liquid crystal display panel 130 to the back surface of the substrate 111 is D, where 20mm≤D≤45mm, thereby achieving a thinner head-up display system 100. The head-up display system 100 occupies a small volume, which facilitates its installation in the car cabin.

[0053] Furthermore, the distance D from the display surface of the liquid crystal display panel 130 to the back surface of the substrate 111 can be, but is not limited to, 45 mm. In other embodiments, the distance D from the display surface of the liquid crystal display panel 130 to the back surface of the substrate 111 can also be 25 mm, 30 mm, 35 mm, 40 mm, or other sizes.

[0054] Please see Figure 5 , Figure 5 A schematic diagram of a head-up display system according to another embodiment of this application is shown. Compared to the optical portion 124 of the light distribution element 122 of the head-up display system 100 in the above embodiment, each optical portion 124 of the light distribution element 122 of the head-up display system 100 in this embodiment is a Fresnel lens structure, which can also play the role of focusing light and can even collimate the light irradiated by the light source device 112. The light can basically pass through the liquid crystal display panel 130. Moreover, the Fresnel lens structure is thinner, that is, the overall thickness of the light distribution element 122 is reduced, which further reduces the thickness of the head-up display system 100, which is conducive to its ultra-thin design and further reduces the space occupied.

[0055] A Fresnel lens structure is disposed on the surface of the light distributor 122 facing the backlight module 110, while multiple protrusions 126 are disposed on the other surface of the light distributor 122. In other embodiments, the Fresnel lens structure may be disposed on the surface of the light distributor 122 away from the backlight module 110, while multiple protrusions 126 are disposed on the surface of the light distributor 122 facing the backlight module 110. The incident light first passes through the protrusions 126 for homogenization, and then passes through the Fresnel lens structure for collimation, thus outputting collimated light or small-angle light.

[0056] Since the Fresnel lens structure is ring-shaped as a whole, the light spot projected by each light source device 112 is correspondingly circular, and the incident light surface that adapts to and covers the Fresnel lens structure is circular.

[0057] Other aspects of the head-up display system 100 in this embodiment are basically the same as those in the above embodiments. For details, please refer to the description of the above embodiments. They will not be repeated here.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A heads-up display system, characterized by, include: A backlight module (110) includes a substrate (111) and a plurality of light source devices (112). The plurality of light source devices (112) are spaced apart on the substrate (111). Each light source device (112) includes a substrate (113), at least one light-emitting chip (114), and a condenser lens (115). The condenser lens (115) is sealed on the substrate (113) and surrounds to form a cavity (116). The light-emitting chip (114) is disposed on the substrate (113) and located in the cavity (116). A liquid crystal display panel (130) is provided corresponding to the backlight module (110); as well as An optical element assembly (120) is disposed between the backlight module (110) and the liquid crystal display panel (130).

2. The head-up display system according to claim 1, characterized in that, The optical element assembly (120) includes a light distribution element (122), which is disposed corresponding to the backlight module (110); The light distribution element (122) has a plurality of optical parts (124) on one side surface. The plurality of optical parts (124) are arranged in a one-to-one correspondence with the plurality of light source devices (112). Adjacent optical parts (124) are connected, and each optical part (124) is used for focusing light.

3. The head-up display system according to claim 2, characterized in that, The light-incident surface of each of the optical units (124) is disposed facing the backlight module (110); Each of the light source devices (112) is used to project a light spot that covers the incident surface of the corresponding optical part (124).

4. The head-up display system of claim 2, wherein, The light-incident surface of each of the optical components (124) is a convex curved surface.

5. The head-up display system according to claim 4, characterized in that, The light-emitting surface of the condenser lens (115) is a convex arc surface; The light-incident surface of each optical element (124) is curved, and its curvature is less than that of the light-outceasing surface of the corresponding condenser lens (115).

6. The head-up display system according to claim 2, characterized in that, The light-incident surface of each of the optical elements (124) is rectangular in orthographic projection onto one side surface of the light distributor (122); Each of the light source devices (112) is used to project a light spot adapted to the orthographic projection.

7. The head-up display system of claim 2, wherein, Each of the optical components (124) is a Fresnel lens structure.

8. The head-up display system of any one of claims 1 to 7, wherein, The emission angle of each of the light source devices (112) is θ, where 10° < θ ≤ 50°.

9. The head-up display system of claim 8, wherein, Each of the light source devices (112) also includes a wavelength conversion layer (118) that covers at least the front side of all the light-emitting chips (114).

10. The head-up display system according to any one of claims 1 to 7, characterized in that, The distance from the display surface of the liquid crystal display panel (130) to the back surface of the substrate (111) is D, where 20mm≤D≤45mm.

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