Head-up display and vehicle

Abstract

The embodiment of the utility model provides a head-up display and a vehicle. The head-up display comprises a display device, a reflection device and a temperature adjusting device. The display device is used for generating first light with image information. The reflecting device is arranged on the light emitting side of the display device and used for reflecting the first light; the temperature adjusting device is used for detecting the temperature of a display screen of the display device and adjusting the temperature of the display screen when the temperature is abnormal. In the head-up display, if sunlight flows backwards and the temperature of the display screen rises, the temperature adjusting device adjusts the temperature of the display screen when the temperature of the display screen is abnormal, such as reducing the temperature of the display screen, so that the damage of high temperature to the display device is reduced.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of head-up display, and in particular to a head-up display and a vehicle. Background Art

[0002] The head-up display is a driving assistance system that can project important information such as speed and navigation onto the windshield in front of the driver, allowing the driver to see important driving information such as speed and navigation without lowering or turning his head.

[0003] In a head-up display, according to the principle of reversibility of light, external light such as sunlight can enter the display chip inside the head-up display. When the sunlight is strong, the temperature of the display chip will rise due to the excessive light intensity, causing damage to the display chip. Utility Model Content

[0004] The embodiments of the utility model provide a head-up display and a vehicle, which can adjust the temperature of the display device when the temperature of the display device is abnormal, thereby reducing the degree of damage to the head-up display caused by high temperature.

[0005] In a first aspect, an embodiment of the utility model provides a head-up display, which includes: a display device, a reflection device and a temperature adjustment device. The display device is used to generate a first light with image information. The reflection device is arranged on the light-emitting side of the display device, and the reflection device is used to reflect the first light; the temperature adjustment device is used to detect the temperature of the display screen of the display device, and adjust the temperature of the display screen when the temperature is abnormal.

[0006] In some embodiments, the head-up display further includes a light intensity detection device and a flip device. The light intensity detection device is arranged on the propagation path of the external light incident into the head-up display, and the flip device is connected to the reflection device; the light intensity detection device is used to detect the illumination intensity of the external light; the flip device is used to control the movement of the reflection device when the illumination intensity is abnormal, so as to change the propagation direction of the external light.

[0007] In some embodiments, the head-up display further comprises a cold light film, which is disposed on a propagation path of the external light and is used to reflect visible light in the external light and transmit infrared light in the external light.

[0008] In some embodiments, the head-up display further comprises a light-transmitting cover, which is disposed on the light-emitting side of the reflective device, and is used to transmit the first light to the windshield.

[0009] In some embodiments, the cold light film is disposed on a surface of the light-transmitting cover.

[0010] In some embodiments, the temperature adjustment device includes a temperature detection unit and a cooling unit. The temperature detection unit is disposed on the surface of the display screen, and the cooling unit is electrically connected to the temperature detection unit. The temperature detection unit is used to detect the temperature of the display screen. The cooling unit is used to work when the temperature is abnormal to reduce the temperature of the display screen.

[0011] In some embodiments, the cooling unit includes a semiconductor refrigerator. The semiconductor refrigerator is disposed on the surface of the display screen and is electrically connected to the temperature detection unit.

[0012] In some embodiments, the reflective device includes a first reflector and a second reflector. The first reflector is disposed on a light emitting side of the display device, and the second reflector is disposed on a propagation path of the first light reflected by the first reflector.

[0013] In a second aspect, an embodiment of the utility model further provides a vehicle, the vehicle comprising a head-up display as described in any one of the embodiments of the first aspect.

[0014] In some embodiments, the vehicle further comprises a windshield. The windshield is disposed on the light emitting side of the head-up display; the windshield is used to reflect the first light.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Different from the prior art, the embodiments of the present invention provide a head-up display and a vehicle, including: a display device, a reflection device and a temperature adjustment device. The display device is used to generate a first light with image information. The reflection device is arranged on the light-emitting side of the display device, and the reflection device is used to reflect the first light; the temperature adjustment device is used to detect the temperature of the display screen of the display device, and adjust the temperature of the display screen when the temperature is abnormal. In the head-up display, if sunlight backflow occurs, the temperature of the display screen will rise, and the temperature adjustment device will adjust the temperature of the display screen when the temperature of the display screen is abnormal, such as lowering the temperature of the display screen, thereby reducing the damage to the display device caused by high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements / modules and steps with the same reference numerals in the drawings are represented as similar elements / modules and steps. Unless otherwise specified, the figures in the drawings do not constitute proportional limitations.

[0017] Figure 1It is a structural block diagram of a head-up display provided by an embodiment of the utility model;

[0018] Figure 2 It is a structural diagram of a head-up display provided by an embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the optical path of a head-up display provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0020] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the utility model. These all fall within the scope of protection of the utility model.

[0021] For ease of understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those generally understood by those skilled in the art of the present application. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not used to limit the present application. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0022] It should be noted that, if there is no conflict, the various features in the embodiments of the present utility model can be combined with each other, and all are within the scope of protection of this application. In addition, although the functional module division is performed in the device schematic, in some cases, the module division can be different from that in the device. In addition, the words "first", "second", etc. used in this article do not limit the data and execution order, but only distinguish the same items or similar items with basically the same functions and effects.

[0023] In a head-up display, in order to reduce the damage caused by the temperature rise of the display device when sunlight flows back, a light sensor is usually added inside the head-up display. When the light intensity exceeds the calibration value, one way is to adjust the brightness of the display device by controlling the backlight brightness of the display device, thereby reducing the brightness of the display device to reduce the temperature of the display device. The second way is to adjust the position of the optical elements inside the head-up display, such as rotating the reflector inside the head-up display, to change the propagation direction of the sunlight, reduce the sunlight flowing back to the display device, and reduce the temperature of the display device. Although both of the above methods can reduce the temperature of the display device, in the first method, the reduction in the backlight brightness of the display device will reduce the display effect of the head-up display, and in the second method, adjusting the position of the optical elements inside the head-up display will reduce the display effect of the head-up display and even fail to provide a display image to the user. It can be seen that although the above two methods can reduce the temperature of the head-up display when sunlight flows back, they will affect the display effect of the head-up display.

[0024] In order to solve the above technical problems, an embodiment of the utility model provides a head-up display and a vehicle, in which a temperature adjustment device is arranged inside the head-up display, which can adjust the temperature of the display screen when the temperature of the display screen of the display device is abnormal, so as to lower the temperature of the display device and reduce the impact on the display effect of the display device.

[0025] In a first aspect, the present invention provides a head-up display 100, see Figure 1 The head-up display 100 includes: a display device 10, a reflection device 20 and a temperature adjustment device 30.

[0026] The reflecting device 20 is disposed on the light emitting side of the display device 10. The display device 10 is used to generate a first light beam with image information. The reflecting device 20 is used to reflect the first light beam. The temperature adjusting device 30 is used to detect the temperature of the display screen of the display device 10 and adjust the temperature of the display screen when the temperature is abnormal.

[0027] The display device 10 may include a liquid crystal display (LCD), an organic light-emitting diode (OLED), or a liquid crystal reflective grating (LCOS). The specific structure of the display device 10 may refer to the prior art and is not limited here. In the present application, the display device 10 including an LCD is used as an example for explanation.

[0028] The reflecting device 20 may include at least one optical element selected from the group consisting of a prism, a reflector, and a grating, which may be used to change the propagation direction of the first light by reflection, and the number of the reflector may be set according to actual needs. Taking a reflector as an example, the reflecting device 20 may include at least one reflector, which may be used to reflect the first light so that the first light can be emitted normally. When subsequently applied to a vehicle, the first light may be emitted to the windshield, and reflected to the human eye through the windshield, so that the user can observe the image.

[0029] In the head-up display 100, the temperature adjustment device 30 detects the temperature of the display screen of the display device. If sunlight backflow occurs, the temperature of the display screen will rise. If the temperature adjustment device 30 detects that the temperature of the display screen is greater than or equal to the first temperature value, the temperature adjustment device 30 will start cooling to reduce the temperature of the display screen. The first temperature value can be set according to actual needs and is not limited here.

[0030] In the head-up display 100, by providing a temperature adjustment device 30 inside the head-up display 100, the temperature of the display screen of the display device 10 can be adjusted when the temperature of the display screen is abnormal, so as to reduce the temperature of the display device 10, thereby reducing the damage to the display device 10 caused by the high temperature caused by the backflow of sunlight. In the above process, there is no need to adjust the position of the optical elements inside the head-up display 100 or adjust the backlight brightness, that is, the head-up display 100 can still work normally, thereby reducing the impact on the display effect of the display device 10.

[0031] In some of these examples, see Figure 2 The reflecting device 20 includes a first reflecting mirror 21 and a second reflecting mirror 22. The first reflecting mirror 21 is disposed on the light emitting side of the display device 10, and the second reflecting mirror 22 is disposed on the propagation path of the first light reflected by the first reflecting mirror 21.

[0032] Among them, the surfaces of the first reflector 21 and the second reflector 22 are coated with a high reflectivity film, and the high reflectivity film can be used to reflect light. For example, the first reflector 21 and the second reflector 22 can be aluminum reflectors, and the aluminum reflector includes a glass substrate and an aluminum film coated on the surface of the glass substrate, so that the aluminum reflector can be used to reflect light. In addition, the surface type of the first reflector 21 and the second reflector 22 can be a plane or a curved surface, and the curved surface can be a free-form surface, etc. In this way, the surfaces of the first reflector 21 and the second reflector 22 can be designed to shape the first light and correct the aberration. Specifically, the flipping device can control the rotation of the first reflector 21 and / or the second reflector 22 to change the propagation direction of the external light after being reflected by the reflecting device 20.

[0033] In this embodiment, by providing the first reflector 21 and the second reflector 22 , the display effect and display position of the head-up display 100 can be adjusted by adjusting the surface type and position of the reflectors, thereby improving the design flexibility of the head-up display 100 .

[0034] In some of these embodiments, please continue to see Figure 2 The temperature adjustment device 30 includes a temperature detection unit 31 and a cooling unit 32. The temperature detection unit 31 is arranged on the surface of the display screen, and the cooling unit 32 is electrically connected to the temperature detection unit 31. The temperature detection unit 31 is used to detect the temperature of the display screen. The cooling unit 32 is used to work when the temperature is abnormal to reduce the temperature of the display screen.

[0035] In the present embodiment, the temperature detection unit 31 may include a contact temperature sensor such as a thermocouple, a thermistor, a thermistor capacitor sensor, or a non-contact temperature sensor such as an infrared temperature sensor, an infrared thermal imager, etc. Among them, if it is a contact temperature sensor, the temperature detection unit 31 is in thermal contact with the surface of the display screen, and the temperature detection unit 31 can detect the temperature of the display screen. It should be noted that in order to reduce the influence of the temperature detection unit 31 on the first light, the temperature detection unit 31 should be set in an area on the surface of the display screen that does not block the output of the first light. The specific setting method and specific detection method of the temperature detection unit 31 can refer to the prior art and are not limited here. In addition, the temperature detection unit 31 can also be a temperature sensor built into the LCD, or it can be a temperature sensor outside the LCD.

[0036] The cooling unit 32 may include a cooling device such as a compression refrigerator and a semiconductor refrigerator. In order to reduce the volume and weight of the head-up display 100, a semiconductor refrigerator is preferably used as the cooling unit 32. Specifically, the semiconductor refrigerator is in thermal contact with the surface of the display screen, and the semiconductor refrigerator is electrically connected to the temperature detection unit 31. Similarly, in order to reduce the influence of the cooling unit 32 on the first light, the cooling unit 32 should be set in an area on the surface of the display screen that does not block the output of the first light.

[0037] In some embodiments, the cooling unit 32 is built with a controller. After the cooling unit 32 is electrically connected to the temperature detection unit 31, the controller built in the cooling unit 32 can receive the temperature detected by the temperature detection unit 31. If sunlight backflow occurs, the temperature of the display screen detected by the temperature detection unit 31 received by the controller will increase. When the temperature is greater than or equal to the first temperature value, the controller controls the cooling unit 32 to start cooling, so that the temperature of the display screen decreases. In other embodiments, the head-up display 100 has a dedicated control device, which is electrically connected to the cooling unit 32 and the temperature detection unit 31, respectively. The control device can receive the temperature detected by the temperature detection unit 31. If sunlight backflow occurs, the temperature of the display screen detected by the temperature detection unit 31 received by the control device will increase. When the temperature is greater than or equal to the first temperature value, the control device controls the cooling unit 32 to start cooling, so that the temperature of the display screen decreases. The controller and the control device can be suitable microprocessor controllers, and their specific models can refer to the prior art and are not limited here.

[0038] It can be seen that in the head-up display, if sunlight backflow occurs, the temperature of the display screen will increase. Then, the cooling unit 32 (such as a semiconductor refrigerator) starts cooling when the temperature of the display screen is greater than or equal to the first temperature value, so that the temperature of the display screen is reduced, thereby reducing the damage to the display device 10 caused by high temperature, and the head-up display 100 can still provide normal and good display functions without affecting the display effect of the display device 10.

[0039] In some of these examples, see Figure 2 The head-up display 100 further includes a light intensity detection device 40 and a flip device. The light intensity detection device 40 is arranged on the propagation path of the external light incident on the head-up display 100, and the flip device is connected to the reflection device 20. The light intensity detection device is used to detect the light intensity of the external light incident on the head-up display. The flip device is used to control the movement of the reflection device 20 when the light intensity is abnormal, so as to change the propagation direction of the external light.

[0040] The external light incident into the head-up display 100 refers to the external light incident into the reflection device 30 , and the light may be reflected by the reflection device 30 to the display screen of the display device 10 .

[0041] The light intensity detection device 40 may include a photoresistor, a photodiode, an optical power meter, an illuminance meter, a solar irradiance meter, and the like. If the light intensity detection device 40 includes an optical power meter, the light receiving surface of the optical power meter is used to receive external light, and the light intensity data detected at any point on the optical power meter can be used as the light intensity of the external light, or the light intensity data detected at multiple points on the optical power meter can be processed and used as the light intensity of the external light.

[0042] In addition, the number of light intensity detection devices 40 can be set according to actual needs. If there are multiple light intensity detection devices 40, the light intensity detected by multiple light intensity detection devices 40 can be taken as the light intensity of the external light. It should be noted that when setting the light intensity detection device 40, the light receiving surface of the light intensity detection device 40 should receive the external light instead of the first light, so as to improve the accuracy of measuring the light intensity of the external light.

[0043] The flip device may include a motor, a pan-tilt platform, a multi-dimensional motion platform, or other suitable devices that can control the reflection device 20 to rotate based on the rotation axis or rotation center to change the propagation direction of the external light after being reflected by the reflection unit. The rotation axis may be a suitable axis such as the symmetry axis of the reflection device 20, and the rotation center may be a suitable position such as the center of the reflection device 20.

[0044] In some embodiments, the flipping device is equipped with a built-in controller, and the light intensity detection device 40 is electrically connected to the flipping device. The built-in controller of the flipping device can receive the light intensity of the external light detected by the light intensity detection device 40. If sunlight backflow occurs, the light intensity of the external light detected by the light intensity detection device 401 received by the controller will increase. When the light intensity is greater than or equal to the first light intensity value, the controller will control the flipping device to operate to control the rotation of the reflection device 20, thereby reducing the external light transmitted to the display device 10, or even preventing the external light from being transmitted to the display device 10.

[0045] In other embodiments, a special control device is provided in the head-up display 100, and the control device is electrically connected to the light intensity detection device 40 and the flipping device, respectively. The control device can receive the light intensity of the external light detected by the light intensity detection device 401. If sunlight backflow occurs, the light intensity of the external light detected by the light intensity detection device 401 received by the control device will increase. When the light intensity is greater than or equal to the first light intensity value, the control device controls the flipping device to operate, so as to control the rotation of the reflection device 20, thereby reducing the external light transmitted to the display device 10, or even preventing the external light from being transmitted to the display device 10.

[0046] It can be seen that in the head-up display, if sunlight backflow occurs and the light intensity is greater than or equal to the first light intensity value, the flip device will start to work, thereby reducing the light intensity of external light reaching the display device, and reducing the damage of sunlight backflow to the head-up display 100. In this embodiment, through the above method, the head-up display 100 can be protected when the temperature adjustment device 30 works abnormally, or the temperature adjustment device 30 works normally but the temperature of the display screen does not drop significantly due to strong external light.

[0047] In some embodiments, the head-up display 100 further includes a cold light film disposed on a propagation path of external light incident into the head-up display 100 , and the cold light film is used to reflect visible light in the external light and transmit infrared light in the external light.

[0048] Specifically, the cold light film can be arranged on the light-emitting side of the reflective device 20. In this way, when sunlight backflow occurs, the external light will be transmitted through the cold light film, wherein the visible light in the external light will be reflected by the cold light film and cannot continue to be transmitted to the reflective device 20, that is, it cannot be transmitted to the display device 10 through the reflective device 20, which can reduce the light intensity of the external light reaching the display device 10, thereby reducing the influence of the external light on the display device 10.

[0049] In some embodiments, the head-up display 100 further includes a light-transmitting cover 50. The light-transmitting cover 50 is disposed on the light-emitting side of the reflective device 20. The light-transmitting cover 50 is used to transmit the first light to the windshield.

[0050] The light-transmitting cover 50 may be a part made of a transparent material through which light can pass, and its specific form is not limited. For example, the light-transmitting cover 50 may be glass with a certain curvature. In this embodiment, by providing the light-transmitting cover 50 on the head-up display 100, the housing of the head-up display 100 can be formed together with other housings of the head-up display. There is a storage space in the housing for placing other components of the head-up display 100, and the light-transmitting cover 50 can ensure that the first light can be emitted normally.

[0051] In some embodiments, the cold light film is disposed on the surface of the light-transmitting cover 50. Specifically, the cold light film can be plated or attached to the outer surface of the light-transmitting cover 50 (the surface away from the display device 10). In this embodiment, by disposing the cold light film on the surface of the light-transmitting cover 50, not only can the damage to the display device 10 caused by backflow of sunlight be reduced, but also the space inside the head-up display 100 can be saved.

[0052] Combine the following Figure 2 The embodiment shown in the figure describes in detail the specific working process of a head-up display 100 provided by the present invention. In this embodiment, the cooling unit 32 adopts a semiconductor refrigerator, the display device 10 includes an LCD, and the flip device can control the second reflector 22 to rotate.

[0053] After the head-up display is installed in the vehicle and powered on, the display device 10 will generate a first light ray with image information based on the input image. The first light ray will be reflected by the first reflector 21, reflected by the second reflector 22, and transmitted to the windshield through the light-transmitting cover 50. Then, the first light ray will enter the human eye after being reflected by the windshield, so that the human eye can observe the image.

[0054] According to the reversibility principle of light, external light such as sunlight can be transmitted through the windshield to the light-transmitting cover 50. Figure 2 and Figure 3 , the external light will be transmitted through the light-transmitting cover 50 , reflected by the second reflector 22 , and reflected by the first reflector 21 to the display device 10 .

[0055] First, the cold light film disposed on the surface of the transparent cover 50 can reduce the light energy of the external light transmitted through the transparent cover 50. If the illumination intensity of the external light is large, resulting in an increase in the temperature of the display screen of the display device 10, when the temperature of the display screen detected by the temperature detection unit 31 is greater than or equal to the first temperature value, the cooling unit 32 will start cooling to reduce the temperature of the display screen. At this time, the position of the optical element inside the head-up display 100 or the backlight brightness is not changed, that is, the head-up display 100 can still work normally, and the display effect of the display device 10 can be guaranteed. Next, if the temperature adjustment device 30 fails, or the temperature adjustment device 30 works normally but the temperature of the display screen does not drop significantly due to strong external light, the light intensity of the external light detected by the light intensity detection device 401 can be judged. If the light intensity is greater than or equal to the first light intensity value, the flip device is operated to control the rotation of the second reflector 22 to reduce the external light reflected from the second reflector 22 to the first reflector 21, or even prevent the external light from being reflected from the second reflector 22 to the first reflector 21, thereby reducing the external light reaching the display screen of the display device 10. It can be understood that after the reflection device 20 rotates, the first light may not be emitted normally, and the display effect of the head-up display 100 will be affected.

[0056] It can be seen that in this embodiment, when sunlight backflow occurs, the cold light film can first reduce the external light entering the head-up display 100. In addition, the temperature adjustment device 30 can adjust the temperature of the display screen when the temperature of the display screen is abnormal, such as lowering the temperature of the display screen, thereby reducing the damage to the display device 10 caused by high temperature. Finally, the flip device can control the reflection device 30 to rotate when the light intensity of the external light is too high, so as to reduce the external light entering the display screen and protect the head-up display 100.

[0057] In a second aspect, an embodiment of the utility model provides a means of transport, the means of transport comprising a head-up display 100 as described in any one of the embodiments of the first aspect. In this embodiment, the head-up display 100 has the same structure and function as the head-up display 100 as described in any one of the embodiments of the first aspect, and will not be described in detail here. The means of transport may be a vehicle, a ship, an airplane, or other means of transport.

[0058] In some of the embodiments, the vehicle further includes a windshield. The windshield is disposed on the light emitting side of the head-up display 100. The windshield is used to reflect the first light. In the present embodiment, the first light is emitted from the display device 10 and reaches the reflecting device 20, and is reflected by the reflecting device 20 and reaches the windshield, and finally enters the human eye after being reflected by the windshield, so that the human eye can observe the image. When sunlight backflow occurs, the sunlight can be transmitted through the windshield to the reflecting device 20, and enter the display device 10 after being reflected by the reflecting device 20. In the present embodiment, the temperature adjustment device 30 will adjust the temperature of the display screen when the temperature of the display screen is abnormal, such as lowering the temperature of the display screen, thereby reducing the damage to the display device 10 caused by high temperature.

[0059] It should be noted that the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A head-up display, characterized in that: include: A display device, the display device is used to generate a first light with image information; A reflecting device, the reflecting device is arranged on the light emitting side of the display device, and the reflecting device is used to reflect the first light; A temperature regulating device is used to detect the temperature of a display screen of the display device and to regulate the temperature of the display screen when the temperature is abnormal.

2. The head-up display according to claim 1, characterized in that: The head-up display also includes a light intensity detection device and a flipping device; The light intensity detection device is arranged on the propagation path of the external light incident on the inside of the head-up display, and the flip device is connected to the reflection device; The light intensity detection device is used to detect the light intensity of the external light; The flipping device is used to control the movement of the reflecting device when the light intensity is abnormal, so as to change the propagation direction of the external light.

3. The head-up display according to claim 2, characterized in that: The head-up display further includes a cold light film; The cold light film is arranged on the propagation path of the external light, and is used for reflecting the visible light in the external light and transmitting the infrared light in the external light.

4. The head-up display according to claim 3, characterized in that: The head-up display further includes a light-transmitting cover; The light-transmitting cover is arranged on the light-emitting side of the reflecting device; Wherein, the light-transmitting cover is used to transmit the first light to the windshield.

5. The head-up display according to claim 4, characterized in that: The cold light film is arranged on the surface of the light-transmitting cover.

6. The head-up display according to any one of claims 1 to 5, characterized in that: The temperature adjustment device includes a temperature detection unit and a temperature reduction unit; The temperature detection unit is arranged on the surface of the display screen, and the cooling unit is electrically connected to the temperature detection unit; Wherein, the temperature detection unit is used to detect the temperature of the display screen; The cooling unit is used to work when the temperature is abnormal, so as to reduce the temperature of the display screen.

7. The head-up display according to claim 6, characterized in that: The temperature reduction unit includes a semiconductor refrigerator; The semiconductor refrigerator is arranged on the surface of the display screen, and the semiconductor refrigerator is electrically connected to the temperature detection unit.

8. The head-up display according to any one of claims 1 to 5, characterized in that: The reflecting device comprises a first reflecting mirror and a second reflecting mirror; The first reflector is disposed on the light emitting side of the display device, and the second reflector is disposed on the propagation path of the first light reflected by the first reflector.

9. A means of transport, characterized in that: Comprising a head-up display as described in any one of claims 1-8.

10. The vehicle according to claim 9, characterized in that: The vehicle also includes a windshield; The windshield is arranged on the light emitting side of the head-up display; The windshield is used to reflect the first light.

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