Novel sunlight backflow monitoring structure of head-up display system

Abstract

The utility model discloses a novel sunlight backflow monitoring structure of a head-up display system, which comprises a controller, a temperature sensor, a windshield, a head-up display, a heat preservation box and a rotatable platform, and is characterized in that the windshield, the head-up display and the heat preservation box are all arranged on the rotatable platform; the windshield is located above the head-up display and the heat preservation box, the heat preservation box is provided with a hollow cavity, the head-up display is located in the hollow cavity, and the temperature sensor is installed on the head-up display. According to the utility model, sunlight is directly used for testing, the accuracy of the sunlight can be ensured, a solar simulator is not needed, the cost of a testing system is greatly reduced, other general devices are combined for cooperation, under the condition of low cost, the HUD environment temperature can be controlled, and three-degree-of-freedom large-angle rotation is realized; the method is more suitable for the actual test environment of HUD sunlight backward flow, enables the test result to be closer to the real situation, and is more suitable for popularization and application.

Description

Technical Field

[0001] This utility model belongs to the field of head-up display technology, specifically relating to a novel head-up display system for monitoring backflow of sunlight. Background Technology

[0002] AR-HUD uses multiple complex optical imaging processes to project a display image onto the windshield, which then reflects the image into the driver's eye, forming a virtual image for recognition. The PGU (Portable Spectrometer) is responsible for generating the image, while the freeform mirror magnifies and projects the image onto the windshield. When sunlight shines directly into the vehicle, especially in high-intensity conditions, the light travels along the backlight path of the image, passing through the windshield, freeform mirror, and other components before finally focusing onto the PGU. Since most existing HUD products use the optical principle of concave mirror magnification, similar to a convex lens, sunlight flowing back into the PGU can cause excessive heat due to light convergence. This can lead to blurred images and information distortion, equipment damage and shortened lifespan, and even burn-out of the PGU. Therefore, monitoring for sunlight backflow is particularly important.

[0003] Existing monitoring methods use solar simulators to simulate the spectrum, intensity, and angle of sunlight. The HUD is directly illuminated by the solar simulator, and monitoring is performed by recording the HUD display parameters and effects. However, solar simulators struggle to perfectly reproduce the solar spectrum; furthermore, they cannot achieve near-solar collimation, with a divergence angle no less than 0.5°. This not only leads to errors in test results compared to actual usage scenarios, failing to reflect the true situation, but also presents significant challenges in the large-scale application of solar simulators in HUD sunlight backflow testing experiments. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a novel structure for monitoring backflow in head-up display systems. This structure aims to solve the problems of existing head-up display systems that use solar simulators instead of the sun. However, solar simulators cannot achieve the high collimation and true spectrum of sunlight, resulting in low accuracy of test results, high testing costs, and difficulty in widespread adoption.

[0006] (2) Technical solution

[0007] To address the aforementioned technical problems, this utility model provides a novel head-up display (HUD) system for monitoring backlighting. This structure includes a controller, a temperature sensor, a windshield, a HUD, an insulation box, and a rotatable platform. The windshield, HUD, and insulation box are all mounted on the rotatable platform. The windshield is positioned above the HUD and insulation box. The insulation box has a hollow cavity, and the HUD is located inside the hollow cavity. The temperature sensor is mounted on the HUD and is used to provide real-time feedback of the HUD's temperature to the controller. The controller is used to adjust the current applied to the HUD to reduce backlight power according to different levels.

[0008] Preferably, it also includes a temperature regulator for adjusting the temperature inside the hollow cavity according to the testing requirements.

[0009] Furthermore, the temperature regulator includes a fan and a temperature generator. The input end of the fan is connected to the hollow cavity through a first duct, and the output end of the fan is connected to the hollow cavity through a second duct. Both the fan and the temperature generator are electrically connected to the controller.

[0010] Furthermore, the temperature generator is a heater or a cooler, or a heater and a cooler.

[0011] Furthermore, brackets are fixedly connected to both the left and right sides of the lower surface of the windshield, and the bottom end of the brackets is fixedly connected to the rotatable platform.

[0012] Furthermore, the insulated box is a transparent box with an opening at the bottom, and the insulated box is fixedly connected to the rotatable platform by screws.

[0013] Furthermore, the rotatable platform is used to provide rotation in three dimensions: α, β, and γ.

[0014] Beneficial effects

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention simulates the sunlight shining on the head-up display in a vehicle under different driving conditions by placing it under real sunlight and rotating it at three angles in space using a rotatable platform. It covers the angle required for testing the sunlight backflow on the head-up display, thus getting as close to the actual situation as possible, reducing experimental errors, and making the results more accurate and consistent with reality.

[0017] This invention, by directly using sunlight for testing, ensures the accuracy of sunlight measurements. Since it eliminates the need for a solar simulator, it significantly reduces the cost of the testing system. Combined with other general-purpose components, it enables control of the HUD ambient temperature and achieves large-angle rotation with three degrees of freedom at low cost. This better matches the actual testing environment of HUD sunlight backflow, making the test results more realistic and suitable for widespread use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the adjustment direction structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the temperature regulator of this utility model.

[0021] Figure 4 This is a schematic diagram of the circuit connection structure of this utility model.

[0022] The labels in the attached diagram are as follows: 1. Controller; 2. Temperature sensor; 3. Windshield; 4. Head-up display; 5. Insulation box; 6. Rotatable platform; 7. Hollow cavity; 8. Temperature regulator; 301. Support; 801. Fan; 802. Temperature generator; 803. First air duct; 804. Second air duct. Detailed Implementation

[0023] This specific embodiment is a novel solar backflow monitoring structure for a head-up display system, and its structural schematic diagram is shown below. Figures 1-4 As shown, the structure includes a controller 1, a temperature sensor 2, a windshield 3, a head-up display 4, an insulation box 5, and a rotatable platform 6. The windshield 3, head-up display 4, and insulation box 5 are all mounted on the rotatable platform 6. The windshield 3 is located above the head-up display 4 and the insulation box 5. The insulation box 5 has a hollow cavity 7. The head-up display 4 is located inside the hollow cavity 7. The temperature sensor 2 is mounted on the head-up display 4. The temperature sensor 2 is used to feed back the temperature of the head-up display 4 to the controller 1 in real time. The controller 1 is used to adjust the current strength of the head-up display 4 to reduce the backlight power according to the level.

[0024] Specifically, the windshield 3 is located on the light-transmitting area of ​​the head-up display 4 and is fixed on the rotatable platform 6. The hollow cavity 7 on the insulation box 5 covers the head-up display 4, or the insulation box 5 is directly fixed inside the hollow cavity 7 to simulate the temperature environment inside the vehicle. In order to simulate the various angles between the head-up display 4 and the external sunlight under different road conditions, the rotatable platform 6 can drive the windshield 3, the head-up display 4 and the insulation box 5 to rotate synchronously.

[0025] like Figure 1-3 As shown: In this embodiment, a temperature regulator 8 is also included. The temperature regulator 8 is used to adjust the temperature inside the hollow cavity 7 according to the test requirements. The temperature regulator 8 includes a fan 801 and a temperature generator 802. The input end of the fan 801 is fixedly connected to the insulation box 5 through the first air duct 803 and communicates with the hollow cavity 7. The output end of the fan 801 is fixedly connected to the insulation box 5 through the second air duct 804 and communicates with the hollow cavity 7. Both the fan 801 and the temperature generator 802 are electrically connected to the controller 1. The temperature generator 802 is a heater or a cooler or a heater and a cooler.

[0026] Since the hollow cavity 7 needs to simulate different working temperatures inside a motor vehicle, an external temperature regulator 8 is connected to the hollow cavity 7 via a ventilation duct. When the temperature needs to be lowered, the cooler cools the cavity, and the fan 801 sends cold air into the hollow cavity 7. The temperature regulator 8 lowers the temperature inside the hollow cavity 7 through the first duct 803 and the second duct 804. When the temperature needs to be raised, the heater heats the cavity, and the fan 801 sends hot air into the hollow cavity 7, thus raising the temperature inside the hollow cavity 7. This achieves controllable and adjustable temperature, allowing the tester to adjust the temperature according to their needs to achieve the desired test results.

[0027] like Figure 1 and Figure 2 As shown: In this embodiment, brackets 301 are fixedly connected to both the left and right sides of the lower surface of the windshield 3. The bottom end of the bracket 301 is fixedly connected to the rotatable platform 6. The windshield 3 is fixed to the rotatable platform 6 through the bracket 301 to ensure that the installation angle is consistent with that on the actual vehicle.

[0028] In this embodiment, the insulated box 5 is a transparent box with an opening at the bottom. The insulated box 5 is fixedly connected to the rotatable platform 6 by screws. The temperature can be easily controlled through the insulated box 5, thereby simulating various temperature conditions inside a motor vehicle.

[0029] like Figure 1 and Figure 2 As shown: In this embodiment, the rotatable platform 6 is used to provide rotation in three dimensions: α, β, and γ.

[0030] Specifically, the rotatable platform 6 can provide rotation in three dimensions: α, β, and γ. α is the pitch angle, β is the roll angle, and γ is the yaw angle. The spatial superposition of these three angles can simulate the situation where sunlight shines on the head-up display 4 under different driving conditions. This can cover the angles required for the sunlight backflow test of the head-up display 4, resulting in more comprehensive test results. The rotatable platform 6 can adopt an existing structure, which will not be described in detail here.

[0031] Working principle: The windshield 3 is fixed to the rotatable platform 6 via bracket 301 to ensure that the installation angle is consistent with that on the actual vehicle. The head-up display 4 is installed below the windshield 3, in the same position as the vehicle. To better reflect reality, an insulated box 5 is introduced to simulate various temperatures inside the vehicle. When testing is required, the hollow cavity 7 on the insulated box 5 covers the head-up display 4 and is securely fixed to the rotatable platform 6 with screws, so that the head-up display 4 is located inside the hollow cavity 7. The above assembly method is consistent with the actual installation method of the head-up display 4 and the vehicle.

[0032] During testing, the windshield 3, head-up display 4, insulation box 5, and rotating platform 6 are placed under real sunlight. By rotating the rotating platform 6 at three angles, the situation of sunlight shining on the head-up display 4 under different driving conditions can be simulated. This can cover the angle required for the head-up display 4 sunlight backflow test. Since the temperature sensor 2 placed on the small reflector and the screen of the head-up display 4 provides real-time temperature feedback, if the temperature sensor 2 detects that the temperature is too high and there is a risk of screen burn-in, the controller 1 will turn off the HUD in time. If the temperature rises, the protection mechanism can be activated, such as reducing the backlight power by adjusting the current of the head-up display 4.

[0033] All technical features in this embodiment can be freely combined according to actual needs.

[0034] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A novel head-up display system for monitoring solar backflow, comprising a controller (1), a temperature sensor (2), a windshield (3), a head-up display (4), an insulated box (5), and a rotatable platform (6), characterized in that: The windshield (3), head-up display (4), and insulation box (5) are all mounted on a rotatable platform (6). The windshield (3) is located above the head-up display (4) and the insulation box (5). The insulation box (5) has a hollow cavity (7). The head-up display (4) is located inside the hollow cavity (7). The temperature sensor (2) is mounted on the head-up display (4). The temperature sensor (2) is used to feed back the temperature of the head-up display (4) to the controller (1) in real time. The controller (1) is used to adjust the current strength of the head-up display (4) to reduce the backlight power according to the level.

2. The novel head-up display system solar backflow monitoring structure according to claim 1, characterized in that, It also includes a temperature regulator (8) for adjusting the temperature inside the hollow cavity (7) according to the needs of the test.

3. The novel head-up display system solar backflow monitoring structure according to claim 2, characterized in that, The temperature regulator (8) includes a fan (801) and a temperature generator (802). The input end of the fan (801) is connected to the hollow cavity (7) through a first duct (803), and the output end of the fan (801) is connected to the hollow cavity (7) through a second duct (804). Both the fan (801) and the temperature generator (802) are electrically connected to the controller (1).

4. The novel head-up display system solar backflow monitoring structure according to claim 3, characterized in that, The temperature generator (802) is a heater or a cooler or a heater and a cooler.

5. The novel head-up display system solar backflow monitoring structure according to claim 1, characterized in that, The windshield (3) has brackets (301) fixedly connected to both sides of its lower surface, and the bottom of the brackets (301) is fixedly connected to the rotatable platform (6).

6. The novel head-up display system solar backflow monitoring structure according to claim 1, characterized in that, The insulated box (5) is a transparent box with an opening at the bottom, and the insulated box (5) is fixedly connected to the rotatable platform (6) by screws.

7. The novel head-up display system solar backflow monitoring structure according to claim 1, characterized in that, The rotatable platform (6) is used to provide rotation in three dimensions: α, β, and γ.

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