A light backflow simulation device

Abstract

This application provides a light backflow simulation device. The device includes a power supply box, a light source box, a light-emitting module, first and second reflectors, a lens module, and a test module. The power supply box is connected to both the light source box and the test module. The light-emitting module, housed within the power supply box, generates a first light beam. The first and second reflectors are arranged in a V-shape with an angled orientation. The first and second reflectors and the lens module are housed within the light source box, with the lens module positioned between the first and second reflectors. The first reflector is positioned above the light-emitting module, guiding the first light beam through it to the lens module. The lens module collimates and homogenizes the first light beam to form a parallel second light beam, which is then guided through the second reflector to the imaging surface of a head-up display (HUD) placed on the test module. The test module can adjust the spatial position and angle of the HUD to simulate sunlight backflow under different incident conditions.

Description

Technical Field

[0001] This utility model relates to the field of head-up display performance testing technology, and in particular to a light backflow simulation device for simulating and testing the "sunlight backflow" phenomenon of vehicle head-up displays in strong sunlight. Background Technology

[0002] Head-up displays (HUDs) are one of the core features of modern cars that enhance driving safety and technological sophistication. They project key driving information (such as vehicle speed and navigation) onto the windshield or a dedicated combination unit in front of the driver through an optical system, allowing the driver to obtain information without looking down and thus keep their eyes on the road at all times.

[0003] The core imaging component of a head-up display is the image generation unit, which is usually a high-brightness miniature display, such as a thin-film transistor liquid crystal display (TFT-LCD), a digital light processing display (DLP), or a liquid crystal on silicon (LCoS).

[0004] However, in actual use, head-up displays face the environmental challenge of sunlight backflow.

[0005] Converging sunlight can generate extremely high local temperatures (potentially exceeding 150°C) on the imaging surface of the Picture Generation Unit (PGU), causing irreversible damage to liquid crystal molecules, aging and warping of polarizers, and even burning out the microdisplay chip, resulting in permanent failure.

[0006] Even if the threshold for hardware damage is not reached, strong backlighting can severely reduce the contrast and readability of the displayed image, making the image appear washed out, blurry, and difficult to identify, thus degrading the image quality and defeating the original purpose of HUD in improving security.

[0007] To ensure the reliability and durability of HUD products, manufacturers must conduct rigorous solar backflow tests during the research and development and production stages.

[0008] However, traditional testing equipment has significant drawbacks: (1) Relying on natural sunlight: placing the prototype vehicle or test sample outdoors and waiting for specific weather and sun angles for testing. This method is time-consuming, inefficient, uncontrollable, and non-repeatable. The test results are severely constrained by geographical location, season, time, and weather, and cannot meet the needs of rapid iterative R&D pace and large-scale production.

[0009] (2) High cost of real vehicle testing: It requires the use of the whole vehicle resources and the relocation of the testing team and equipment to a specific site, which is very costly in terms of manpower, material resources and time.

[0010] (3) Poor test consistency: Because the intensity, spectrum and incident angle of natural sunlight are constantly changing, test data from different batches or even different times on the same day lack comparability, making it difficult to conduct accurate quantitative analysis and trace the source of problems.

[0011] (4) Unable to conduct extreme and accelerated tests: It is difficult to simulate the solar radiation conditions in the world’s harshest regions (such as deserts and plateaus), and it is also impossible to conduct 7x24-hour accelerated aging tests. Summary of the Invention

[0012] This utility model provides a light backflow simulation device, which aims to solve the technical problems of low accuracy, uncontrollable time, non-repeatable testing, and low efficiency of existing light backflow simulation devices for testing head-up displays in a laboratory environment.

[0013] This utility model provides a light backflow simulation device. The light backflow simulation device is used for testing head-up displays and includes: Power supply box, light source box, light-emitting module, first reflector, lens module, second reflector and test module; The power supply box is located on one side of the light source box, and the body of the power supply box is physically connected to the body of the light source box and at least partially to the test module. The light-emitting module is used to generate a first light beam, and the light-emitting module is disposed inside the power supply box. The first reflector and the second reflector are tilted relative to each other and are arranged in a figure-eight shape; The first reflector, the lens module, and the second reflector are disposed inside the housing of the light source box, and the lens module is located between the first reflector and the second reflector; The first reflector is positioned above the light-emitting module so that the first light beam is guided to the lens module through the first reflector; The lens module is used to collimate and homogenize the first beam to form a parallel second beam, which is guided by the second reflector to the imaging surface of the head-up display under test placed on the test module. The test module can adjust the spatial position and angle of the head-up display under test to simulate sunlight backflow under different incident conditions.

[0014] In some embodiments, the housing of the light source box includes: The light inlet housing and the light outlet housing are connected to the housing of the power supply box, and the light outlet housing is located on the side of the light inlet housing away from the power supply box.

[0015] In some embodiments, the lens module includes: Collimating lens, compound lens, fixed frame, and plano-convex lens; The compound lens is mounted in the light-inlet box via the fixed frame, the collimating lens is mounted in the light-inlet box, and the plano-convex lens is mounted in the light-outlet box. The collimating lens, the compound lens, and the plano-convex lens are arranged sequentially along the optical path transmission direction.

[0016] In some embodiments, the light-inlet box has a carrier frame, and the first reflector is fixedly mounted in the light-inlet box via the carrier frame; The light-emitting box has a mounting bracket, and the second reflector is fixed in the light-incoming box by the mounting bracket.

[0017] In some embodiments, the light-emitting module has a lamp tube and a reflector, and the power supply box has a mounting base, a fan, connecting terminals and a metal tripod; The lamp tube is electrically connected to the connection terminal so that the power supply box provides power to the lamp tube, thereby causing the lamp tube to emit the first light beam; The reflector bowl is fixed to the mounting base by the metal tripod, and the lamp tube is located inside the reflector bowl so that the first beam is focused; The fan is located below the light-emitting module so that the light-emitting module can dissipate heat through the fan.

[0018] In some embodiments, the test module includes: Platform, carrier, and lifting mechanism; The power supply box is connected to the platform. A lifting mechanism is provided on the side of the platform away from the power supply box. A platform is installed on the top of the lifting mechanism, and the head-up display to be tested is placed on the platform. The installation position of the head-up display under test corresponds to the setting position of the second reflector, so that the second beam is guided to the imaging surface of the head-up display under test through the second reflector; The lifting mechanism is used to drive the platform to make three-dimensional adjustments to the head-up display under test to simulate sunlight backflow.

[0019] At least one beneficial effect of the backlighting simulation device provided in this embodiment of the present invention is that: the backlighting simulation device can control the intensity parameters and irradiance parameters of the first beam emitted by the light-emitting module through the power supply box, adjust the illumination angle of the second beam by adjusting the installation position of the second reflector, and adjust the size of the light spot on the imaging surface of the head-up display under test by adjusting the distance between the head-up display under test and the second reflector through the test module, thereby simulating sunlight to test the head-up display under test. The backlighting simulation device can also adjust the spatial position and angle of the head-up display under test through the test module, thereby simulating the backlighting scenario and testing the performance of the head-up display under test such as screen burn-in or failure after sunlight backlighting; in summary, this backlighting simulation device uses simulated sunlight to replace natural sunlight, thereby avoiding real-vehicle real-scene testing, reducing testing costs, ensuring test consistency, and also enabling extreme and accelerated testing. Attached Figure Description

[0020] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 A schematic diagram of the structure of the light backflow simulation device provided in this embodiment of the utility model; Figure 2 A cross-sectional schematic diagram of a partial structure of the light backflow simulation device provided in this embodiment of the utility model; Figure 3 A schematic diagram showing the positional relationship between the reflector bowl, the first reflector, the second reflector, and the lens module provided in an embodiment of this utility model.

[0022] Reference numerals: 100, Light backflow simulation equipment; 1001, Light path transmission direction; 1, Power supply box; 11, Power supply box housing; 12, Mounting base; 13, Fan; 14, Connecting terminal; 15, Metal tripod; 2, Light source box; 21, Light source box housing; 211, Light inlet housing; 212, Light outlet housing; 2111, Carrier frame; 2121, Mounting frame; 3, Light emission module; 31, Lamp tube; 32, Reflector bowl; 4, First reflector; 5, Lens module; 51, Collimating lens; 52, Compound eye lens; 53, Fixing frame; 54, Plano-convex lens; 6, Second reflector; 7, Test module; 71, Stand; 72, Platform; 73, Lifting mechanism. Detailed Implementation

[0023] The present invention will now be described in detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0024] It should be noted that, unless otherwise expressly specified and limited, the terms "mutually inclined," "along," "away from," "guided," "below," etc., used in this specification to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 the present invention. The terms "installed," "connected," "joined," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Furthermore, the terms "first" and "second" 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, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature; "a plurality" or "several" means two or more; "and / or" includes any and all combinations of one or more of the related listed items. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The term "sunlight backflow" refers to the phenomenon where, when a vehicle is driving towards the sun in clear weather, intense sunlight travels backward through the HUD's exit (i.e., the windshield or combiner) and into the HUD's interior, eventually converging on the image generation unit. Essentially, this is a reverse optical path process.

[0026] like Figures 1-3 As shown, the backflow simulation device 100 is used for testing head-up displays.

[0027] Please see Figures 1-3 The backflow simulation device 100 includes: a power supply box 1, a light source box 2, a light emission module 3, a first reflector 4, a lens module 5, a second reflector 6, and a test module 7.

[0028] The power supply box 1 is located on one side of the light source box 2, and the box body 11 of the power supply box is physically connected to the box body 21 of the light source box and at least part of the test module 7 by bolts.

[0029] In addition, the light-emitting module 3 is used to generate the first light beam, and the light-emitting module 3 is disposed inside the housing 11 of the power supply box.

[0030] Furthermore, the first reflector 4 and the second reflector 6 are tilted relative to each other and are arranged in a figure-eight shape; the reflecting surfaces of the first reflector 4 and the second reflector 6 are arranged opposite each other, together forming an optical path structure that deflects the light path.

[0031] It should be noted that the first reflector 4, the lens module 5, and the second reflector 6 are located inside the housing 21 of the light source box, and the lens module 5 is located between the first reflector 4 and the second reflector 6.

[0032] Understandably, the first reflector 4 is positioned above the light-emitting module 3 so that the first beam of light is guided through the first reflector 4 to the lens module 5.

[0033] Specifically, the lens module 5 is used to collimate and homogenize the first beam to form a parallel second beam, which is then guided by the second reflector 6 to the imaging surface of the head-up display under test placed on the test module 7.

[0034] To further explain, the test module can adjust the spatial position and angle of the head-up display under test to simulate sunlight backflow under different incident conditions.

[0035] In some embodiments, such as Figures 1-3 The light source box 2 includes a light-inlet box 211 and a light-outlet box 212.

[0036] In this embodiment of the application, the light-inlet box 211 is connected to the box 11 of the power supply box, and the light-outlet box 212 is located on the side of the light-inlet box 211 away from the power supply box 1.

[0037] In some embodiments, such as Figures 1-3 The lens module 5 includes: a collimating lens 51, a compound lens 52, a fixed frame 53, and a plano lens 54.

[0038] In this embodiment, the collimating lens 51 is used to collimate the first beam, the compound lens 52 is used to improve the uniformity of the light field entering the lens module 5, and the plano-convex lens 54 is used to converge the light field entering the lens module 5 and form a focused second beam.

[0039] Among them, the compound lens 52 is set in the light-entry box 211 by the fixing frame 53, the collimating lens 51 is set in the light-entry box 211, and the plano-convex lens 54 is set in the light-exit box 212. In addition, the collimating lens 51, the compound lens 52, and the plano-convex lens 54 are arranged sequentially along the optical path transmission direction 1001. That is, the collimating lens 51 is fixed to the front end of the lens module 5 by bolts, the compound lens 52 is set in the middle of the lens module 5 by a fixing frame 53, and the plano-convex lens 54 is installed at the rear end of the lens module 5.

[0040] In some embodiments, such as Figures 1-3 The light-inlet housing 211 has a carrier 2111 inside, and the first reflector 4 is fixedly installed inside the light-inlet housing 211 via the carrier 2111.

[0041] It should be noted that the light-emitting box 212 has a mounting bracket 2121, and the second reflector 6 is fixed in the light-inlet box 211 by the mounting bracket 2121.

[0042] In some embodiments, such as Figures 1-3 The light-emitting module 3 has a lamp tube 31 and a reflector bowl 32, and the power supply box 1 has a mounting base 12, a fan 13, a connecting terminal 14 and a metal tripod 15.

[0043] The lamp tube 31 is electrically connected to the connection terminal 14 so that the power supply box 1 provides power to the lamp tube 31, thereby causing the lamp tube 31 to emit a first beam of light.

[0044] In addition, the reflector bowl 32 is fixed to the mounting base 12 by a metal tripod 15, and the lamp tube 31 is located inside the reflector bowl 32 so that the first beam is focused.

[0045] In addition, the fan 13 is located below the light-emitting module 3 so that the light-emitting module 3 can be cooled by the fan 13.

[0046] In some embodiments, such as Figures 1-3 The test module 7 includes: a stand 71, a platform 72, and a lifting mechanism 73.

[0047] The power supply box 11 is connected to the stand 71. The stand 71 is provided with a lifting mechanism 73 on the side away from the power supply box 1. The top of the lifting mechanism 73 is equipped with a platform 72, and the head-up display to be tested is placed on the platform 72.

[0048] Specifically, the installation position of the head-up display under test corresponds to the setting position of the second reflector 6, so that the second beam is guided to the imaging surface of the head-up display under test through the second reflector 6.

[0049] To further explain, the lifting mechanism 73 is used to drive the platform 72 to make three-dimensional adjustments to the head-up display under test to simulate sunlight backflow.

[0050] It should be noted that the lifting mechanism 73 can adjust the distance between the platform 72 and the second reflector 6, and the platform 72 itself also has a pitch angle adjustment function, which enables the head-up display under test fixed on it to achieve position and attitude adjustment in three-dimensional space.

[0051] In this embodiment, the power supply box 1 can control the light intensity parameters of the lamp tube and set the irradiance of the first beam. The backflow simulation device 100 adjusts the illumination angle of the first beam by rotating the light output box 212. The backflow simulation device 100 adjusts the illumination angle of the second beam by adjusting the second reflector 6. The backflow simulation device 100 adjusts the distance between the head-up display under test or the platform 72 and the second reflector 6 by adjusting the lifting mechanism 73 to adjust the size of the light spot on the imaging surface of the head-up display under test by the second beam, thereby simulating sunlight to test the head-up display under test.

[0052] Specifically, the backlight simulation device 100 can accommodate different models of head-up displays by changing the platform 72. The backlight simulation device 100 can simulate a backlight scenario by adjusting the spatial position and angle of the platform 72, thereby testing the performance of the head-up display under test, such as screen burn-in or failure, after backlighting.

[0053] In summary, the light backflow simulation device provided by this utility model embodiment can control the intensity and irradiance parameters of the first beam emitted by the light-emitting module through the power supply box, adjust the illumination angle of the second beam by adjusting the installation position of the second reflector, and adjust the size of the light spot on the imaging surface of the head-up display under test by adjusting the distance between the head-up display under test and the second reflector through the test module, thereby simulating sunlight to test the head-up display under test. This light backflow simulation device can also adjust the spatial position and angle of the head-up display under test through the test module to simulate a sunlight backflow scenario, thereby testing the performance of the head-up display under test such as screen burn-in or failure after sunlight backflow. In conclusion, this light backflow simulation device uses simulated sunlight to replace natural sunlight, thereby avoiding real-vehicle and real-scene testing, reducing testing costs, ensuring test consistency, and enabling extreme and accelerated testing.

[0054] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and all of these fall within the protection scope of the present invention.

Claims

1. A light backflow simulation device, used for testing head-up displays, characterized in that, include: Power supply box, light source box, light-emitting module, first reflector, lens module, second reflector and test module; The power supply box is located on one side of the light source box, and the body of the power supply box is physically connected to the body of the light source box and at least partially to the test module. The light-emitting module is used to generate a first light beam, and the light-emitting module is disposed inside the power supply box. The first reflector and the second reflector are tilted relative to each other and are arranged in a figure-eight shape; The first reflector, the lens module, and the second reflector are disposed inside the housing of the light source box, and the lens module is located between the first reflector and the second reflector; The first reflector is positioned above the light-emitting module so that the first light beam is guided to the lens module through the first reflector; The lens module is used to collimate and homogenize the first beam to form a parallel second beam, which is guided by the second reflector to the imaging surface of the head-up display under test placed on the test module. The test module can adjust the spatial position and angle of the head-up display under test to simulate sunlight backflow under different incident conditions.

2. The light backflow simulation device according to claim 1, characterized in that, The housing of the light source box includes: The light inlet housing and the light outlet housing are connected to the housing of the power supply box, and the light outlet housing is located on the side of the light inlet housing away from the power supply box.

3. The light backflow simulation device according to claim 2, characterized in that, The lens module includes: Collimating lens, compound lens, fixed frame, and plano-convex lens; The compound lens is mounted in the light-inlet box via the fixed frame, the collimating lens is mounted in the light-inlet box, and the plano-convex lens is mounted in the light-outlet box. The collimating lens, the compound lens, and the plano-convex lens are arranged sequentially along the optical path transmission direction.

4. The light backflow simulation device according to claim 2, characterized in that, The light-inlet box has a carrier frame, and the first reflector is fixedly installed in the light-inlet box through the carrier frame; The light-emitting box has a mounting bracket, and the second reflector is fixed in the light-incoming box by the mounting bracket.

5. The light backflow simulation device according to claim 1, characterized in that, The light-emitting module has a lamp tube and a reflector, and the power supply box has a mounting base, a fan, a connecting terminal and a metal tripod. The lamp tube is electrically connected to the connection terminal so that the power supply box provides power to the lamp tube, thereby causing the lamp tube to emit the first light beam; The reflector bowl is fixed to the mounting base by the metal tripod, and the lamp tube is located inside the reflector bowl so that the first beam is focused; The fan is located below the light-emitting module so that the light-emitting module can dissipate heat through the fan.

6. The light backflow simulation device according to claim 1, characterized in that, The test module includes: Platform, carrier, and lifting mechanism; The power supply box is connected to the platform. A lifting mechanism is provided on the side of the platform away from the power supply box. A platform is installed on the top of the lifting mechanism, and the head-up display to be tested is placed on the platform. The installation position of the head-up display under test corresponds to the setting position of the second reflector, so that the second beam is guided to the imaging surface of the head-up display under test through the second reflector; The lifting mechanism is used to drive the platform to make three-dimensional adjustments to the head-up display under test to simulate sunlight backflow.

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