Head-up display and vehicle

Abstract

The utility model provides a head-up display and a vehicle. The head-up display comprises a first housing, a display module, a reflection module, a first light intensity detection module and a second light intensity detection module. A containing space is arranged in the first shell, the first shell is further provided with a light outlet, the reflection module, the display module and the second light intensity detection module are all arranged in the containing space, the first light intensity detection module is arranged outside the containing space, and the reflection module is arranged on the light outlet side of the display module. The first light intensity detection module and the second light intensity detection module are both arranged on a light path of external light emitted into the head-up display. According to the head-up display, sunlight illumination intensity detection is realized through the first light intensity detection module, internal illumination intensity detection of the head-up display is realized through the second light intensity detection module, and whether a protection action is executed or not can be determined based on combination of the sunlight illumination intensity detection and the internal illumination intensity detection, so that the head-up display is protected when sunlight flows backwards.

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] Head-up display systems are usually used in cars. They can project information on the car dashboard and navigation information to the human eye, so that the driver can see the required information without lowering his head when looking directly at the actual driving conditions ahead, thereby improving the driver's driving experience and safety. For example, when the head-up display is used as an in-vehicle projection equipment to enhance assisted driving safety, it can ensure that the driver can see a lot of driving information such as vehicle speed and navigation without taking his eyes off the surrounding environment.

[0003] As the image area displayed by the head-up display increases and the magnification of the head-up display becomes higher and higher, the risk of sunlight backflow becomes greater. The sunlight energy will be more concentrated on the image generation unit, which may cause serious consequences such as material aging, thermal stress damage, and even direct burning, damaging the image generation unit. Utility Model Content

[0004] The embodiment of the utility model provides a head-up display and a protection method and a vehicle, which can detect the internal light intensity and the sunlight light intensity, and then protect the head-up display when the sunlight backflows based on the light intensity of the two.

[0005] In a first aspect, an embodiment of the utility model provides a head-up display, which includes: a first shell, a display module, a reflection module, a first light intensity detection module and a second light intensity detection module; a receiving space is provided in the first shell, and a light outlet is also provided in the first shell, the reflection module, the display module and the second light intensity detection module are all provided in the receiving space, the first light intensity detection module is provided outside the receiving space, the reflection module is provided on the light outlet side of the display module, and the first light intensity detection module and the second light intensity detection module are both provided on the optical path of external light incident on the inside of the head-up display; wherein the display module is used to emit a first light with image information to the reflection module; the reflection module is used to reflect the first light so that the first light is emitted through the light outlet; the first light intensity detection module includes at least three light intensity sensors, each of which is used to detect the intensity of sunlight; the second light intensity detection module is used to detect the internal light intensity in the receiving space.

[0006] In some embodiments, each of the light intensity sensors has a photosensitive surface for receiving the external light, and the planes where the photosensitive surfaces of the light intensity sensors are located are perpendicular to each other, or the planes where the photosensitive surfaces of the light intensity sensors are located are not perpendicular to each other.

[0007] In some embodiments, the first light intensity detection module further includes a second housing; the second housing has a plurality of side surfaces, the number of the side surfaces is equal to the number of the light intensity sensors, and the side surfaces correspond to the light intensity sensors one by one, and the light-sensitive surfaces of the light intensity sensors are disposed on the corresponding side surfaces.

[0008] In some embodiments, the central axis of the second housing is parallel to the external light.

[0009] In some embodiments, the reflection module includes at least one first mirror; the first mirror is configured to reflect the first light, reflect a part of the external light, and transmit another part of the external light; the second light intensity detection module is disposed on the transmission optical path of the external light transmitted by the first mirror.

[0010] In some embodiments, the head-up display further includes a beam splitting module; the beam splitting module is disposed between the light output side of the display module and the reflection module; the second light intensity detection module is disposed on the reflection optical path of the external light reflected by the beam splitting module; wherein, the beam splitting module is configured to transmit the first light to the reflection module, transmit a part of the external light to the display module, and reflect another part of the external light to the second light intensity detection module.

[0011] In some embodiments, the second light intensity detection module is disposed on the reflection optical path of the external light reflected by the display module.

[0012] In some embodiments, the display module includes an LCD.

[0013] In a second aspect, an embodiment of the present invention provides a vehicle, which includes a windshield and the head-up display according to any one of the first aspect; the windshield is disposed on the light output side of the head-up display.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: Different from the prior art, the embodiments of the present utility model provide a head-up display and a vehicle. The head-up display includes: a first housing, a display module, a reflection module, a first light intensity detection module, and a second light intensity detection module; a receiving space is provided inside the first housing, and the first housing is further provided with a light outlet. The reflection module, the display module, and the second light intensity detection module are all arranged inside the receiving space, the first light intensity detection module is arranged outside the receiving space, the reflection module is arranged on the light-emitting side of the display module, and both the first light intensity detection module and the second light intensity detection module are arranged on the optical path of the external light incident into the head-up display; wherein, the display module is used to emit a first light with image information to the reflection module; the reflection module is used to reflect the first light so that the first light is emitted through the light outlet; the first light intensity detection module includes at least three light intensity sensors, and each light intensity sensor is used to detect the sunlight illumination intensity; the second light intensity detection module is used to detect the internal illumination intensity inside the receiving space. The head-up display realizes the detection of the sunlight illumination intensity through the first light intensity detection module, and realizes the detection of the internal illumination intensity of the head-up display through the second light intensity detection module. Subsequently, it can be determined whether to perform a protection action based on the combination of the two to realize the protection of the head-up display when sunlight backflows. Description of the Drawings

[0015] In one or more embodiments, exemplary illustrations are provided through the pictures in the corresponding drawings. These exemplary illustrations 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 stated, the drawings in the figures do not constitute a proportional limitation.

[0016] Figure 1 It is a schematic structural diagram of a head-up display provided by an embodiment of the present utility model;

[0017] Figure 2 It is a structural block diagram of a head-up display provided by an embodiment of the present utility model;

[0018] Figure 3 It is a schematic structural diagram of a first light intensity detection module provided by an embodiment of the present utility model;

[0019] Figure 4 It is a schematic structural diagram of another first light intensity detection module provided by an embodiment of the present utility model;

[0020] Figure 5 It is a schematic diagram of an equivalent geometric model provided by an embodiment of the present utility model;

[0021] Figure 6 It is a schematic structural diagram of another head-up display provided by an embodiment of the present utility model;

[0022] Figure 7 It is a schematic structural diagram of another head-up display provided by an embodiment of the present invention;

[0023] Figure 8 It is a schematic structural diagram of another head-up display provided by an embodiment of the present invention. Specific embodiments

[0024] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those of ordinary skill in the art can make several deformations and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0025] To facilitate the understanding of the present application, the present application will be 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 commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not used to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0026] It should be noted that if there is no conflict, the various features in the embodiments of the present invention can be combined with each other, and all are within the protection scope of this application. In addition, although the functional modules are divided in the device schematic diagram, in some cases, it can be different from the module division in the device. In addition, the terms "first", "second", etc. used herein do not limit the data and execution order, but only distinguish the same items or similar items with basically the same functions and effects.

[0027] In the head-up display, please refer to Figure 1 , if sunlight backflows, then the sunlight will pass through the windshield 4, be reflected by the reflector 3 and the reflector 2, and finally be focused on the display module 1. When the light intensity of the sunlight is too strong, the sunlight focused on the display module 1 is too strong, so that the temperature of the display module 1 rises and screen burn occurs.

[0028] To improve the above technical problems, the embodiments of the present invention provide a head-up display and a vehicle, which detect the light intensity of the backflowing sunlight through multiple sensors, and subsequent protection actions can be performed based on the detected light intensity, thereby protecting the display module.

[0029] In a first aspect, the embodiments of the present invention provide a head-up display 100, please refer to Figure 2, the head-up display 100 includes: a first housing 10, a display module 20, a reflection module 30, a first light intensity detection module 40, and a second light intensity detection module 50.

[0030] A receiving space is provided inside the first housing 10. The first housing 10 is further provided with a light outlet. The reflection module 30, the display module 20, and the second light intensity detection module 50 are all disposed inside the receiving space. The first light intensity detection module 40 is disposed outside the receiving space. The reflection module 30 is disposed on the light-emitting side of the display module 20. Both the first light intensity detection module 40 and the second light intensity detection module 50 are disposed on the optical path of the external light L2 incident into the head-up display 100.

[0031] Among them, the display module 20 is used to emit a first light ray L1 with image information to the reflection module 30. The reflection module 30 is used to reflect the first light ray L1 so that the first light ray L1 is emitted through the light outlet. The first light intensity detection module 40 includes at least three light intensity sensors, and each light intensity sensor is used to detect the sunlight illumination intensity. The second light intensity detection module 50 is used to detect the internal illumination intensity inside the receiving space.

[0032] The interior of the first housing 10 has a receiving space, which can be used to house the display module 20, the reflection module 30, and the second light intensity detection module 50. The shape of the first housing 10 can be set according to actual needs and will not be limited here.

[0033] The display module 20 includes a liquid crystal display (LCD). The LCD is a device that uses the optical properties of liquid crystal materials to display images. It includes one or more layers of thin films, which contain liquid crystal materials, and the molecules of these materials can be oriented by the action of an electric field. The LCD usually consists of several layers, including polarizers, glass substrates, liquid crystal layers, color filters, etc. Its specific structure can refer to the prior art and will not be limited here.

[0034] The reflection module 30 is located under the light-emitting path of the display module 20 and can receive the first light ray L1 emitted by the display module 20. The reflection module 30 includes suitable optical devices such as mirrors, reflection prisms, and reflection films that can be used to change the propagation direction of light rays.

[0035] The second light intensity detection module 50 and the light intensity sensors can both include devices such as photoresistors, photodiodes, optical power meters, illuminance meters, and solar irradiance meters, so that the second light intensity detection module 50 and the light intensity sensors can detect the illumination intensity.

[0036] In the head-up display 100, the first light ray L1 generated by the display module 20 can be reflected by the reflection module 30. Subsequently, when the head-up display 100 is applied to a vehicle, the reflection module 30 can reflect the first light ray L1 to the windshield 200. Then, after being reflected by the windshield 200, the first light ray L1 can enter the human eye, and the human eye can observe the image content, thereby realizing head-up display.

[0037] When sunlight backflows, that is, when the external light ray L2 is transmitted through the windshield 200 and enters the interior of the head-up display 100, the external light ray L2 will be reflected by the reflection module 30 to the display module 20. Since both the first light intensity detection module 40 and the second light intensity detection module 50 are provided on the propagation path of the external light ray L2, the first light intensity detection module 40 can measure the sunlight rays respectively to obtain multiple sunlight illumination intensities, and can detect the light intensity caused by the external light ray L2 entering the interior of the head-up display 100. In addition, since the reflection module 30, the display module 20, and the second light intensity detection module 50 are all provided in the internal accommodation space of the first housing 10, and since the first light ray L1 and the external light ray L2 will be scattered when passing through each device, the second light intensity detection module 50 can detect the illumination intensity in the accommodation space of the first housing 10, that is, the internal illumination intensity.

[0038] In the head-up display 100 provided in this embodiment, it is possible to determine whether sunlight backflow occurs based on the internal illumination intensity detected by the second light intensity detection module 50, and then use the first light intensity detection module 40 to detect the sunlight intensity after sunlight backflow occurs, so as to determine whether to perform a protection operation according to the illumination intensity. The protection operation can be to control the reflection module 30 to rotate so that the external light ray L2 is reflected to other places instead of the display module 20, or to control the display module 20 to turn off the display, thereby protecting the display module 20 when sunlight backflows. Moreover, in this application, multiple light intensity sensors are used to detect the sunlight illumination intensity, and this design of multiple sensors can improve the accuracy of sunlight illumination intensity detection.

[0039] In some embodiments, each light intensity sensor has a photosensitive surface for receiving the external light ray L2, and the planes where the photosensitive surfaces of the light intensity sensors are located are perpendicular to each other in pairs, or the planes where the photosensitive surfaces of the light intensity sensors are located are not perpendicular to each other.

[0040] The photosensitive surface is the surface of the light intensity sensor for receiving the external light ray L2. It is usually a plane and is composed of photosensitive elements, which can sense the incident light and generate a response. In addition, the structures of the light intensity sensors are the same, and the areas of the photosensitive surfaces of the light intensity sensors are equal.

[0041] The planes where the photosensitive surfaces of each light intensity sensor are located are perpendicular to each other in pairs means that the plane where the photosensitive surface of each light intensity sensor is located is perpendicular to the plane where the photosensitive surface of any other light intensity sensor is located. The planes where the photosensitive surfaces of each light intensity sensor are located are not perpendicular to each other means that the plane where the photosensitive surface of each light intensity sensor is located is not perpendicular to the plane where the photosensitive surface of any other light intensity sensor is located, that is to say, the included angle between them is not 90 degrees.

[0042] It can be understood that when sunlight backflow occurs, it is usually necessary to consider the light intensity (or illuminance, irradiance) of sunlight in the direction perpendicular to the sunlight, rather than the light intensity of sunlight in the sea level direction or the light intensity of sunlight in other directions. In order to accurately measure the light intensity of sunlight in the direction perpendicular to the sunlight, if a single light intensity sensor is used for measurement, when the direction of sunlight is not perpendicular to the photosensitive surface of the light intensity sensor, the light intensity directly measured by the light intensity sensor cannot represent the true light intensity in the direction perpendicular to the sunlight. In this embodiment, by making the photosensitive surfaces of each light intensity sensor perpendicular or not perpendicular to each other, the error caused by a single light intensity sensor can be eliminated, and by obtaining the light intensity detected by each light intensity sensor and the angle between the photosensitive surface of each light intensity sensor and the direction of sunlight, the light intensity of sunlight in the direction perpendicular to the sunlight can be calculated, and the measurement accuracy can be improved.

[0043] In some embodiments, the first light intensity detection module 40 further includes a second housing. The second housing has a plurality of side surfaces, the number of side surfaces is equal to the number of light intensity sensors, and the side surfaces correspond to the light intensity sensors one by one, and the photosensitive surfaces of each light intensity sensor are arranged on the corresponding side surfaces.

[0044] The second housing is used to fix each light intensity sensor, and its specific shape can be set according to actual needs and will not be limited here.

[0045] Specifically, as Figure 3 shown, the light intensity detection module includes a second housing, a light intensity sensor 411, a light intensity sensor 412, and a light intensity sensor 413. Among them, the outer shape of the second housing can be a regular triangular pyramid, and the outer side surfaces A1B1D1, A1C1D1, and A1B1C1 of the regular triangular pyramid are perpendicular to each other in pairs. The photosensitive surfaces of the light intensity sensor 411, the photosensitive surface of the light intensity sensor 412, and the photosensitive surface of the light intensity sensor 413 are respectively arranged on the three outer side surfaces of the second housing. Among them, the distances from the centers of the photosensitive surfaces of each light intensity sensor to the bottom surface of the second housing are equal, and the centers of the photosensitive surfaces of each light intensity sensor are in the same plane and perpendicular to the bottom surface.

[0046] Or, as Figure 4As shown, the outer shape of the second housing can be a regular triangular pyramid without a bottom surface. The inner side surfaces A2B2D2, A2C2D2, and A2B2C2 of the regular triangular pyramid are perpendicular to each other in pairs. The light-receiving surfaces of the light intensity sensors 411, 412, and 413 are respectively arranged on the three inner side surfaces of the second housing.

[0047] In this embodiment, by arranging the light intensity sensors on the second housing, the position of the light intensity detection module can be conveniently set later.

[0048] In some embodiments, the central axis of the second housing is parallel to the external light L2.

[0049] Specifically, in Figure 3 the shown embodiment, the central axis of the second housing is the straight line connecting the vertex of the second housing and the center of the bottom surface B1C1D1. By arranging the central axis of the second housing parallel to the external light L2, and since the light-receiving surface sizes of the light intensity sensors are the same, the light intensities received by the three light intensity sensors can be the same, which is convenient for calculating the light intensity of the sunlight perpendicular to the sunlight direction later.

[0050] Since the light-receiving surface areas of the light intensity sensors 411, 412, and 413 are equal, for the convenience of calculation, the light-receiving surfaces of the sensors are simplified into isosceles right triangles. As Figure 5 shown, the light intensity sensor 411 is equivalent to the right triangle △ABC, the light intensity sensor 412 is equivalent to the right triangle △ACD, and the light intensity sensor 413 is equivalent to the right triangle △ABD. The three side edges AB, AC, and AD of the triangular pyramid A - BCD are perpendicular to each other in pairs. O is the projection of point A on the bottom surface BCD. Connect BO and DO.

[0051] ∵BA⊥CA, BA⊥DA, CA∩DA = A,

[0052] ∴BA⊥ plane ACD, and since CD ∈ plane ACD,

[0053] ∴CD⊥BA,

[0054] Also, ∵AO⊥ plane BDC, CD ∈ plane BDC,

[0055] ∴CD⊥AO,

[0056] ∵AO∩BA = A,

[0057] ∴CD⊥ plane ABO, that is, BO⊥CD,

[0058] ∴BO is the height on the DC side.

[0059] Similarly, it can be obtained that DO is the height on the side BC. Therefore, O is the orthocenter of △BDC. That is, in the right - angled space tetrahedron ABCD, O is the orthocenter of △BCD. Extend BO to intersect CD at point E. E is the mid - point of CD. It can be known that AE⊥CD. Since AB, AC, and AD are perpendicular to each other pairwise, the projection O of A on the bottom surface is the orthocenter of the bottom surface △BCD, then BE⊥CD. Then there is:

[0060]

[0061]

[0062] Then, assuming that the sensing coefficient of the light intensity sensor is α, the intensity of the sunlight in the direct - sunlight direction AO

[0063]

[0064] That is, in Figure 3 In the illustrated embodiment, if the light intensities detected by the light intensity sensors 411, 412, and 413 are x, y, and z respectively, then the light intensity of the sunlight perpendicular to the sunlight direction is I = x + y+z.

[0065] In this embodiment, the method of using multiple sensors for measurement can reduce the error caused by a single light intensity sensor, and the light intensity of the sunlight perpendicular to the sunlight direction can be calculated through the light intensities detected by multiple light intensity sensors.

[0066] In some implementations, after obtaining the internal light intensity measured by the second light intensity detection module 50, the internal light intensity is compared with the first threshold. If the internal light intensity is greater than the first threshold, it is considered that sunlight back - flow occurs. If the internal light intensity is less than the first threshold, it is considered that sunlight back - flow does not occur. Then, the light intensity perpendicular to the external light ray L2 direction is calculated according to the light intensities detected by the light intensity sensors in the first light intensity detection module 40. As Figure 3 In the illustrated embodiment, if sunlight back - flow occurs, the sunlight light intensity perpendicular to the sunlight direction is calculated according to I = x + y + z. Then, the sunlight light intensity is compared with the second threshold. If the sunlight light intensity is greater than the second threshold, it is determined to activate the protection action. If the sunlight light intensity is less than the second threshold, it is determined not to activate the protection action. The protection action can be to control the rotation of the reflection module 30 to reflect the external light ray L2 to other places instead of the display module 20, or to control the display module 20 to turn off the display, thereby protecting the display module 20.

[0067] In practical applications, the arithmetic mean of the light intensities detected by each light intensity sensor can also be compared with a second threshold to determine whether to activate the protection action. The second threshold can be 1050 W / m², which is set according to actual needs and is not limited herein. The second threshold can be set according to actual needs and is not limited herein.

[0068] It can be seen that in the head-up display 100 provided in this application, it is possible to first determine whether sunlight backflow occurs based on the internal light intensity detected by the second light intensity detection module 50. After sunlight backflow occurs, calculate the sunlight intensity value perpendicular to the sunlight direction based on the light intensities detected by each light intensity sensor, and determine whether to activate the protection action based on the sunlight intensity value perpendicular to the sunlight direction, which can reduce the situation of false triggering of the protection action and improve the reliability and accuracy of the protection action.

[0069] In some embodiments, refer to Figure 6 , the reflection module 30 includes at least one first mirror 31. The first mirror 31 is used to reflect the first light ray L1, reflect a part of the external light ray L2, and transmit another part of the external light ray L2; the second light intensity detection module 50 is disposed on the transmission optical path of the external light ray L2 transmitted by the first mirror 31.

[0070] The reflectivity of the first mirror 31 to the first light ray L1 is close to 100%, the transmittance to the first light ray L1 is close to 0%, and the reflectivity and transmittance to the external light ray L2 can be 50%. In practical applications, the transmittance and reflectivity of the first mirror 31 to the external light ray L2 can be set according to actual needs.

[0071] Specifically, the reflection module 30 further includes at least one second mirror 32, and the second mirror 32 is used to reflect the first light ray L1. The reflectivity of the second mirror 32 to both the first light ray L1 and the external light ray L2 is close to 100%, and the transmittance to both the first light ray L1 and the external light ray L2 is close to 0%.

[0072] For example, please refer to Figure 6 , the reflection module 30 includes a first mirror 31 and a second mirror 32. Among them, the first mirror 31 is disposed on the light exit side of the display module 20, the second mirror 32 is disposed on the optical path of the first light ray L1 reflected by the first mirror 31, the windshield 200 is disposed on the optical path of the first light ray L1 reflected by the second mirror 32, and the second light intensity detection module 50 is disposed on the optical path of the external light ray L2 transmitted by the first mirror 31. It should be noted that the light-sensitive surface of the second light intensity detection module 50 should be oriented towards the external light ray L2 to ensure that the light-sensitive surface of the second light intensity detection module 50 can receive the external light ray L2.

[0073] In the head-up display 100, after the first light ray L1 exits from the display module 20, it can propagate to the first reflector 31, and after being reflected by the first reflector 31, the second reflector 32, and the windshield 200, it enters the human eye to achieve head-up display.

[0074] In practical applications, the surface types of the first reflector 31 and the second reflector 32 can be flat or curved surfaces, and the curved surface can be a free-form surface, etc. In this way, the first light ray L1 can be shaped and the aberration can be corrected through the design of the reflector surface.

[0075] In this embodiment, the internal light illumination intensity can be detected by the first reflector 31 and the second light intensity detection module 50.

[0076] In some embodiments, referring to Figure 7 , the head-up display 100 further includes a beam splitting module 60; the beam splitting module 60 is disposed between the light output side of the display module 20 and the reflection module 30; the second light intensity detection module 50 is disposed on the reflection light path of the external light ray L2 reflected by the beam splitting module 60; wherein, the beam splitting module 60 is used to transmit the first light ray L1 to the reflection module 30, transmit a part of the external light ray L2 to the display module 20, and reflect the other part of the external light ray L2 to the second light intensity detection module 50.

[0077] The beam splitting module 60 can include suitable optical devices such as a beam splitter and a beam splitting prism. The transmittance of the beam splitting module 60 to the first light ray L1 is close to 100%, the reflectance of the beam splitting module 60 to the first light ray L1 is close to 0%, the transmittance of the beam splitting module 60 to the external light ray L2 is close to 50%, and the reflectance of the beam splitting module 60 to the external light ray L2 is close to 50%. In practical applications, the transmittance and reflectance of the beam splitting module 60 to the first light ray L1 and the transmittance and reflectance of the beam splitting module 60 to the external light ray L2 can be set according to actual needs.

[0078] In some embodiments, as Figure 7 shown, the beam splitting module 60 adopts a beam splitter, the reflection module 30 includes a second reflector 33 and a second reflector 34, the beam splitter is disposed on the light output side of the display module 20, the second reflector 33 is disposed on the light path of the first light ray L1 transmitted by the beam splitter, the second reflector 34 is disposed on the light path of the first light ray L1 reflected by the second reflector 33, the windshield 200 is disposed on the light path of the first light ray L1 reflected by the second reflector 34, and the second light intensity detection module 50 is disposed on the light path of the external light ray L2 reflected by the beam splitter.

[0079] In the head-up display 100, after the first light ray L1 exits from the display module 20, it can enter the human eye after passing through the beam splitting module 60 by transmission, being reflected by the second mirror 33, the second mirror 34, and the windshield 200, thereby realizing head-up display. Meanwhile, if sunlight backflow occurs, the external light ray L2 will pass through the windshield 200 by transmission, be reflected by the second mirror 33 and the second mirror 34, and reach the beam splitting module 60. A part of the external light ray L2 passes through the beam splitting module 60 by transmission and reaches the display module 20, and another part of the external light ray L2 is reflected by the beam splitting module 60 and reaches the second light intensity detection module 50, and the second light intensity detection module 50 will detect the light intensity.

[0080] In this embodiment, the internal light intensity detection is realized by the beam splitting module 60 and the second light intensity detection module 50.

[0081] In some embodiments, the second light intensity detection module 50 is arranged on the reflection light path of the external light ray L2 reflected by the display module 20.

[0082] In some implementations, as Figure 8 shown, the reflection module 30 includes a second mirror 35 and a second mirror 36. The second mirror 35 is arranged on the light exit side of the display module 20, the second mirror 36 is arranged on the light path of the first light ray L1 reflected by the second mirror 35, the windshield 200 is arranged on the light path of the first light ray L1 reflected by the second mirror 36, and the second light intensity detection module 50 is arranged on the light path of the external light ray L2 reflected by the display module 20. It should be noted that, in this embodiment, the light exit surface of the display module 20 is not perpendicular to the first light ray L1, so that the external light ray L2 can be reflected to the second light intensity detection module 50.

[0083] In the head-up display 100, after the first light ray L1 exits from the display module 20, it can propagate to the second mirror 31, and enter the human eye after being reflected by the first mirror 31, the second mirror, and the windshield 200, thereby realizing head-up display. Meanwhile, the external light ray L2 will pass through the windshield 200 by transmission, be reflected by the second mirror and the second mirror, reach the display module 20, and then be reflected by the display module 20 to the second light intensity detection module 50.

[0084] In a second aspect, an embodiment of the present invention provides a vehicle, which includes a windshield 200 and a head-up display 100 as described in any one of the first aspects; the windshield 200 is arranged on the light exit side of the head-up display 100.

[0085] In this embodiment, the head-up display 100 has the same structure and function as the head-up display 100 described in any one of the embodiments of the first aspect, and will not be elaborated here. The vehicle can be a vehicle such as a car or a train.

[0086] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0087] 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 them; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of brevity, they are not provided in detail; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A head-up display, characterized in that, Comprising: A first housing, a display module, a reflection module, a first light intensity detection module, and a second light intensity detection module; A receiving space is provided inside the first housing, and the first housing is further provided with a light outlet. The reflection module, the display module, and the second light intensity detection module are all arranged inside the receiving space. The first light intensity detection module is arranged outside the receiving space. The reflection module is arranged on the light-emitting side of the display module. Both the first light intensity detection module and the second light intensity detection module are arranged on the optical path of the external light incident into the head-up display; Wherein, the display module is configured to emit a first light carrying image information to the reflection module; The reflection module is configured to reflect the first light so that the first light is emitted through the light outlet; The first light intensity detection module includes at least three light intensity sensors, and each light intensity sensor is configured to detect the sunlight illumination intensity; The second light intensity detection module is configured to detect the internal illumination intensity inside the receiving space.

2. The head-up display according to claim 1, wherein Each light intensity sensor has a photosensitive surface for receiving the external light. The planes where the photosensitive surfaces of the light intensity sensors are located are perpendicular to each other in pairs, or the planes where the photosensitive surfaces of the light intensity sensors are located are not perpendicular to each other.

3. The head-up display according to claim 2, characterized in that, The first light intensity detection module further includes a second housing; The second housing has a plurality of side surfaces. The number of the side surfaces is equal to the number of the light intensity sensors, and the side surfaces correspond to the light intensity sensors one by one. The photosensitive surface of each light intensity sensor is arranged on the corresponding side surface.

4. The head-up display according to claim 3, wherein The central axis of the second housing is parallel to the external light.

5. The head-up display according to any one of claims 1-4, characterized in that, The reflection module includes at least one first mirror; The first mirror is configured to reflect the first light, reflect a part of the external light, and transmit another part of the external light; The second light intensity detection module is arranged on the transmission optical path of the external light transmitted by the first mirror.

6. The head-up display according to any one of claims 1-4, characterized in that, The head-up display further includes a beam splitting module; The beam splitting module is arranged between the light-emitting side of the display module and the reflection module; The second light intensity detection module is arranged on the reflection optical path of the external light reflected by the beam splitting module; Wherein, the beam splitting module is configured to transmit the first light to the reflection module, transmit a part of the external light to the display module, and reflect another part of the external light to the second light intensity detection module.

7. The head-up display according to any one of claims 1-4, characterized in that, The second light intensity detection module is arranged on the reflection optical path of the external light reflected by the display module.

8. The head-up display according to any one of claims 1-4, characterized in that, The display module includes an LCD.

9. A vehicle, characterized in that, Comprising a windshield and the head-up display according to any one of claims 1-7; The windshield is arranged on the light-emitting side of the head-up display.

Images