Foreign matter detection device, head-up display and vehicle

Abstract

The utility model provides a foreign matter detection device, a head-up display and a vehicle, and relates to the technical field of vehicles. The foreign matter detection device comprises a transmitting assembly, a receiving assembly and a detection control piece. The transmitting assembly is arranged at one end of the imaging light path. The transmitting assembly is used for transmitting detection light. The receiving assembly is arranged at the other end of the imaging light path. The receiving assembly is used for receiving the detection light. The transmitting assembly and the receiving assembly are electrically connected with the detection control piece. The foreign matter detection device is arranged on the imaging light path of the head-up display, and the light path of the detection light is at least partially overlapped with the imaging light path, so that the foreign matter detection device detects whether foreign matters exist in the imaging light path or not in real time, the detection control piece indicates the existence of the foreign matters, and the foreign matters are prevented from influencing display information; and the driving safety of the vehicle is improved. By arranging the foreign matter detection device in the imaging light path, the foreign matter detection device can adapt to different head-up displays, and the universality of the foreign matter detection device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and in particular, to a foreign object detection device, a head-up display, and a vehicle. Background Art

[0002] A head-up display is a display technology that projects important information into the driver's field of vision.

[0003] In the prior art, a head-up display includes a projection device and a display screen. The projection device is arranged on the instrument panel. The projection device can project information such as vehicle speed, gear, and navigation onto the display screen in front of the driver during driving. In this way, the driver can obtain driving information without lowering the head, improving driving safety and convenience.

[0004] However, the existing head-up display device has the problem that it cannot identify foreign objects in the optical path between the projection device and the display screen. Utility Model Content

[0005] The present application provides a foreign object detection device, a head-up display, and a vehicle. The foreign object detection device realizes the real-time detection of foreign objects in the imaging optical path of the head-up display, improving the intelligent level of the vehicle.

[0006] In a first aspect, the present application provides a foreign object detection device for detecting foreign objects between a projection member and an imaging member in a head-up display. An imaging optical path is formed between the projection member and the imaging member. The foreign object detection device is located in the imaging optical path. The foreign object detection device includes a transmitting component, a receiving component, and a detection control member. The transmitting component is arranged at one end of the imaging optical path. The transmitting component is used for emitting detection light. The receiving component is arranged at the other end of the imaging optical path. The receiving component is used for receiving the detection light.

[0007] Both the transmitting component and the receiving component are electrically connected to the detection control member.

[0008] Wherein, the optical path of the detection light coincides with at least a part of the imaging optical path.

[0009] In the above foreign object detection device, optionally, the transmitting component is connected to one of the projection member and the imaging member. The receiving component is connected to the other of the projection member and the imaging member.

[0010] In the above foreign object detection device, optionally, both the transmitting component and the receiving component are arranged between the projection member and the imaging member. The transmitting component is arranged near one of the projection member and the imaging member. The receiving component is arranged near the other of the projection member and the imaging member.

[0011] In the above foreign object detection device, optionally, a light guiding member is arranged on at least one of the transmitting component and the receiving component. The light guiding member is used for adjusting the optical path of the detection light.

[0012] In the above foreign object detection device, optionally, the transmitting component includes a transmitting housing, a light emitting element, and a first light guide plate. The transmitting housing forms a first cavity. The light emitting element and the first light guide plate are both located in the first cavity.

[0013] The light emitting end of the light emitting element is connected to the light incident end of the first light guide plate. The first light guide plate has at least one bent section. The light emitting element is electrically connected to the detection control component.

[0014] In the above foreign object detection device, optionally, the receiving component includes a receiving housing, a second light guide plate, and a receiving element. The receiving housing forms a second cavity. The second light guide plate and the receiving element are both located in the second cavity.

[0015] The second light guide plate has at least one bent section. The light incident end of the second light guide plate faces the transmitting component. The light emitting end of the second light guide plate faces the receiving end of the receiving element.

[0016] The receiving element is electrically connected to the detection control component.

[0017] In the above foreign object detection device, optionally, the first light guide plate includes a first light guide section and a second light guide section connected to each other. The extending direction of the first light guide section is parallel to the projection plane of the projection member. The first light guide section is disposed on the projection plane. The extending direction of the second light guide section intersects with the extending direction of the first light guide section.

[0018] And / or, the second light guide plate includes a third light guide section and a fourth light guide section connected to each other. The extending direction of the third light guide section is parallel to the projection plane of the projection member. The third light guide section is disposed on the projection plane. The extending direction of the fourth light guide section intersects with the extending direction of the third light guide section.

[0019] In the above foreign object detection device, optionally, along a first direction, the sum of the extending lengths of the first light guide plate and the transmitting housing is less than or equal to 4 mm. The sum of the extending lengths of the second light guide plate and the receiving housing is less than or equal to 4 mm. The first direction is parallel to the projection plane.

[0020] And / or, along a direction perpendicular to the projection plane, the sum of the extending lengths of the first light guide plate and the transmitting housing is less than or equal to 1.5 mm. The extending length of the second light guide plate and the receiving housing is less than or equal to 1.5 mm.

[0021] In a second aspect, the present application provides a head-up display, including a projection member, an imaging member, a control member, and a foreign object detection device. An imaging optical path is formed between the projection member and the imaging member. The foreign object detection device is located in the imaging optical path. The foreign object detection device is electrically connected to the control member.

[0022] In a third aspect, the present application provides a vehicle, including a cockpit, a front windshield, and a head-up display. The front windshield is disposed in the cockpit and opposite to the driver's seat in the cockpit. The head-up display is disposed in the cockpit.

[0023] The display surface of the head-up display faces the driver's seat of the vehicle.

[0024] The present application provides a foreign object detection device, a head-up display, and a vehicle. The foreign object detection device is used for detecting foreign objects between a projection component and an imaging component in the head-up display. An imaging optical path is formed between the projection component and the imaging component. The foreign object detection device is located in the imaging optical path. The foreign object detection device includes a transmitting component, a receiving component, and a detection control component. The transmitting component is disposed at one end of the imaging optical path. The transmitting component is used for emitting detection light. The receiving component is disposed at the other end of the imaging optical path. The receiving component is used for receiving the detection light. Both the transmitting component and the receiving component are electrically connected to the detection control component. Wherein, the optical path of the detection light coincides with at least a part of the imaging optical path. By disposing the foreign object detection device on the imaging optical path of the head-up display and setting the optical path of the detection light to coincide with at least a part of the imaging optical path, in this way, the foreign object detection device can detect in real time whether there is a foreign object in the imaging optical path, realizing the real-time detection of foreign objects on the imaging optical path of the head-up display, avoiding the influence of foreign objects on the display information of the display component, and improving the driving safety of the vehicle. By disposing the foreign object detection device in the imaging optical path, the foreign object detection device can be adapted to different head-up displays, is not limited by the layout of the head-up display, and improves the versatility of the foreign object detection device.

[0025] By providing the transmitting component and the receiving component, the transmitting component and the receiving component can ensure the accurate transmission and reception of the detection light, improve the reliability and stability of foreign object detection, and improve the driving safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 Structural schematic diagram of the head-up display provided by the embodiment of the present application installed inside the vehicle Figure 1 ;

[0028] Figure 2 Structural schematic diagram of the head-up display provided by the embodiment of the present application installed inside the vehicle Figure 2 ;

[0029] Figure 3Structural schematic of the projection component and foreign object detection device of the head-up display provided by the embodiment of the present application Figure 1 ;

[0030] Figure 4 Structural schematic of the projection component and foreign object detection device of the head-up display provided by the embodiment of the present application Figure 2 ;

[0031] Figure 5 Structural schematic of the projection component and foreign object detection device of the head-up display provided by the embodiment of the present application Figure 3 ;

[0032] Figure 6 Structural schematic of the projection component and foreign object detection device of the head-up display provided by the embodiment of the present application Figure 4 。

[0033] Explanation of reference numerals:

[0034] 100: Head-up display; 110: Projection component; 120: Display component;

[0035] 200: Instrument panel;

[0036] 300: Foreign object detection device;

[0037] 310: Transmitting component; 311: Transmitting housing; 312: First light guide plate; 312a: First light guide section; 312b: Second light guide section; 313: Light emitting component;

[0038] 320: Receiving component; 321: Receiving housing; 322: Second light guide plate; 322a: Third light guide section; 322b: Fourth light guide section; 323: Receiving component.

[0039] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0040] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0041] A Head-Up Display (HUD) is a technology that projects information onto a transparent screen in front of the driver's line of sight. The main purpose of a head-up display is to reduce the frequency of the driver or pilot looking down at the instrument panel, thereby enhancing safety and the driving experience.

[0042] In the prior art, a Photonic Head-Up Display (PHUD) is an advanced display system that uses holographic technology to improve the traditional Head-Up Display (HUD). The holographic head-up display generates and projects images through holographic optical elements, providing a higher-quality display effect and more functions.

[0043] The holographic head-up display has a multi-screen surround display area that can carry more display content. Among them, the screen in front of the driver's main seat mainly displays driving-related information, and the middle and co-pilot positions can display other information such as entertainment and multimedia outside of driving.

[0044] The holographic head-up display includes a projection device and a display screen. The projection device is set on the instrument panel. The projection device can project information such as vehicle speed, gear, and navigation onto the display screen in front of the driver while driving.

[0045] Dirt, dust, or water droplets can affect the imaging optical path of the head-up display, resulting in blurred or incomplete display information. Items on the instrument panel, decorations hanging in the car, etc. may enter the imaging optical path of the head-up display and cause blockages.

[0046] When a foreign object blocks the imaging optical path, key driving information (such as speed, navigation instructions, etc.) may be partially blocked, resulting in the driver being unable to obtain complete information. The displayed information may become blurred or distorted, affecting the driver's judgment and reaction. Due to the inability to accurately obtain the information displayed by the head-up display, the driver may be distracted or make incorrect driving decisions, increasing the risk of accidents. In addition, frequent foreign object blockages will reduce the driver's trust and satisfaction with the head-up display, affecting the overall user experience.

[0047] Compared with a conventional head-up display, the holographic head-up display has a larger display area. Therefore, foreign objects have a serious impact on the display area of the holographic head-up display. However, existing head-up displays have the problem of being unable to identify foreign objects in the optical path between the projection device and the display screen.

[0048] In view of this, the embodiments of the present application provide a foreign object detection device, a head-up display, and a vehicle. The foreign object detection device is used for detecting foreign objects between a projection component and an imaging component in the head-up display. An imaging optical path is formed between the projection component and the imaging component. The foreign object detection device is located in the imaging optical path. The foreign object detection device includes a transmitting component, a receiving component, and a detection control component. The transmitting component is arranged at one end of the imaging optical path. The transmitting component is used for emitting detection light. The receiving component is arranged at the other end of the imaging optical path. The receiving component is used for receiving the detection light. Both the transmitting component and the receiving component are electrically connected to the detection control component. Among them, the optical path of the detection light coincides with at least a part of the imaging optical path. By arranging the foreign object detection device on the imaging optical path of the head-up display and setting the optical path of the detection light to coincide with at least a part of the imaging optical path, the foreign object detection device can detect in real time whether there is a foreign object in the imaging optical path, realizing the real-time detection of foreign objects on the imaging optical path of the head-up display.

[0049] In the present application, by arranging the transmitting component and the receiving component, the transmitting component and the receiving component can ensure the accurate transmission and reception of the detection light, improve the reliability and stability of foreign object detection, and improve the driving safety of the vehicle.

[0050] In the present application, by arranging the foreign object detection device in the imaging optical path, the foreign object detection device can be adapted to different head-up displays, is not limited by the layout of the head-up display, and improves the versatility of the foreign object detection device.

[0051] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals represent the same or similar components or components with the same or similar functions from beginning to end. The described embodiments are some but not all of the embodiments of the present application. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0052] Figure 1 Schematically showing the structural schematic of the head-up display 100 provided by the embodiment of the present application installed inside the vehicle Figure 1 。 Figure 2 Schematically showing the structural schematic of the head-up display 100 provided by the embodiment of the present application installed inside the vehicle Figure 2 。

[0053] In a first aspect, an embodiment of the present application provides a vehicle, including a cockpit, a front windshield, and a head-up display 100. The front windshield is disposed in the cockpit and opposite to the driver's seat in the cockpit. The head-up display 100 is disposed in the cockpit.

[0054] The display surface of the head-up display 100 faces the driver's seat of the vehicle.

[0055] Exemplarily, as shown in Figures 1 to 2 , by disposing the head-up display 100 in the cockpit of the vehicle, the head-up display 100 can directly superimpose vehicle information onto the real road scene seen by the driver, so that the driver does not need to look down at the dashboard disposed on the instrument panel 200 during driving, thereby improving driving safety. The vehicle provided with the head-up display 100 realizes the superposition of the projected virtual image of the driving information of the vehicle and real things, and realizes the deep integration of the driving information and the real world.

[0056] Figure 3 Schematically showing the structural schematic diagram of the projection member 110 and the foreign object detection device 300 of the head-up display 100 provided by the embodiment of the present application Figure 1 . Figure 4 Schematically showing the structural schematic diagram of the projection member 110 and the foreign object detection device 300 of the head-up display 100 provided by the embodiment of the present application Figure 2 .

[0057] In a second aspect, as shown in Figures 1 to 4 , the present application provides a head-up display 100, including a projection member 110, an imaging member, a control member, and a foreign object detection device 300. An imaging optical path is formed between the projection member 110 and the imaging member. The foreign object detection device 300 is located in the imaging optical path. The foreign object detection device 300 is electrically connected to the control member.

[0058] Exemplarily, during the driving process of the vehicle by the driver, the projection member 110 projects the driving information of the vehicle to the display member 120 through the projection end in real time, and the display member 120 displays the driving information of the vehicle in real time. Among them, the display surface of the display member 120 is always within the driver's line of sight. When the driver needs to view the vehicle information, the driver can view the driving information of the vehicle in real time through the display surface of the display member 120 disposed in front of himself. The driver no longer needs to look down to view the relevant vehicle driving information through the dashboard, avoiding the driver's distraction of observing the road ahead, avoiding the driver's adjustment of the eyes between observing the road in the distance and the dashboard nearby, avoiding eye fatigue, and improving the driving safety of the driver.

[0059] Exemplarily, the foreign object detection device 300 is used to detect whether there is a foreign object in the imaging optical path between the projection member 110 and the imaging member. When there is a foreign object in the imaging optical path, the foreign object detection device 300 gives a prompt to the driver in time, so as to improve the driving safety of the driver. By arranging the foreign object detection device 300 in the imaging optical path, the foreign object detection device 300 can be adapted to different head-up displays 100, is not limited by the layout of the head-up display 100, and improves the versatility of the foreign object detection device 300.

[0060] Exemplarily, the display member 120 includes glass with color.

[0061] Exemplarily, the projection member 110 includes a laser emitter.

[0062] Exemplarily, the control member can be a part of the electronic control unit (ECU) of the vehicle to obtain relevant driving information of the vehicle.

[0063] The following details how the foreign object detection device 300 detects foreign objects on the imaging optical path.

[0064] Figure 5 Schematically shows the structural schematic of the projection member 110 and the foreign object detection device 300 of the head-up display 100 provided by the embodiment of the present application Figure 3 。 Figure 6 Schematically shows the structural schematic of the projection member 110 and the foreign object detection device 300 of the head-up display 100 provided by the embodiment of the present application Figure 4 。

[0065] In a third aspect, as shown in Figures 4 to 6 The present application provides a foreign object detection device 300 for detecting foreign objects between the projection member 110 and the imaging member in the head-up display 100. An imaging optical path is formed between the projection member 110 and the imaging member. The foreign object detection device 300 is located in the imaging optical path. The foreign object detection device 300 includes a transmitting component 310, a receiving component 320, and a detection control member. The transmitting component 310 is arranged at one end of the imaging optical path. The transmitting component 310 is used to emit detection light. The receiving component 320 is arranged at the other end of the imaging optical path. The receiving component 320 is used to receive the detection light.

[0066] Both the transmitting component 310 and the receiving component 320 are electrically connected to the detection control member.

[0067] Wherein, the optical path of the detection light coincides with at least a part of the imaging optical path.

[0068] Exemplarily, when the foreign object detection device 300 is in an operating state, the detection control member controls the emission component 310 to emit detection light. The detection light propagates along the optical path of the detection light. The receiving component 320 receives the detection light and transmits the received signal to the detection control member. The detection control member analyzes the signal transmitted by the receiving component 320. If the detection control member confirms that the signal intensity received by the receiving component 320 is normal, it is determined that there is no foreign object in the imaging optical path. If the detection control member confirms that the signal intensity received by the receiving component 320 is weakened or interrupted, it is determined that there is a foreign object in the imaging optical path.

[0069] In this application, the foreign object detection device 300 is disposed on the imaging optical path, and the optical path of the detection light and the imaging optical path are set to at least partially coincide. In this way, since the detection light coincides with the imaging optical path, when there is a foreign object on the imaging optical path, the detection light will be blocked, and the light intensity received by the receiving component 320 becomes weaker. The detection control member can accurately determine whether there is a foreign object on the imaging optical path according to the change in the intensity of the received light, thereby improving the accuracy of detection.

[0070] Exemplarily, by disposing the foreign object detection device 300 in the imaging optical path, the foreign object detection device 300 can be adapted to different head-up displays 100, without being limited by the layout of the head-up display 100, improving the versatility of the foreign object detection device 300.

[0071] It can be understood that the detection light emitted by the emission component 310 will not affect the light on the imaging optical path, and the normal operation of the imaging optical path will not be disturbed. This ensures the stability of the projection member 110 and the imaging quality.

[0072] At the same time, when there is a foreign object on the imaging optical path, the foreign object detection device 300 can timely send a signal to the control member of the head-up display 100. At this time, the head-up display 100 can control the projection member to project a prompt text of "there is a foreign object" onto the display member 120 to remind the driver to clean or maintain the foreign object on the imaging optical path in time, thereby ensuring the clarity and integrity of the information displayed by the head-up display 100.

[0073] Exemplarily, a buzzer is further provided inside the vehicle. The buzzer is connected to the control member. When the control member of the head-up display 100 obtains the signal sent by the foreign object detection device 300, the control member controls the buzzer to emit a prompt sound.

[0074] As an implementable embodiment, the emission component 310 is connected to one of the projection member 110 and the imaging member. The receiving component 320 is connected to the other of the projection member 110 and the imaging member.

[0075] In some embodiments, the emission component 310 is connected to the projection member 110. The receiving component 320 is connected to the imaging member.

[0076] In some other embodiments, the transmitting component 310 is connected to the imaging member. The receiving component 320 is connected to the projection member 110.

[0077] By connecting the transmitting component 310 to one of the projection member 110 and the imaging member, and connecting the receiving component 320 to the other of the projection member 110 and the imaging member, the space of the head-up display 100 is reasonably utilized, the requirement for the installation space is reduced, and the structural compactness of the head-up display 100 is improved. At the same time, this layout makes the installation and maintenance of the transmitting component 310 and the receiving component 320 more convenient. Since they are respectively connected to different components of the head-up display 100, a certain component can be processed separately during maintenance without disassembling the entire head-up display 100, thereby improving the maintenance efficiency of the head-up display 100. In addition, the foreign object detection device 300 can be adapted to different head-up displays 100, is not limited by the layout of the head-up display 100, and improves the versatility of the foreign object detection device 300.

[0078] As an implementable embodiment, both the transmitting component 310 and the receiving component 320 are disposed between the projection member 110 and the imaging member. The transmitting component 310 is disposed near one of the projection member 110 and the imaging member. The receiving component 320 is disposed near the other of the projection member 110 and the imaging member.

[0079] Exemplarily, considering that the projection member 110 is disposed below the instrument panel 200 and the space below the instrument panel 200 is limited, in the embodiments of the present application, the transmitting component 310 and the receiving component 320 are disposed between the projection member 110 and the imaging member to reduce the occupation of the space below the instrument panel 200. Wherein, one of the transmitting component 310 and the receiving component 320 can be disposed above the instrument panel 200. The other of the transmitting component 310 and the receiving component 320 can be disposed below the instrument panel 200. In this way, the limited space can be effectively utilized, and the foreign object detection device 300 is prevented from occupying too much space below the instrument panel 200, thereby optimizing the space layout. At the same time, this layout can also ensure the coincidence of the detection light and the imaging light on the imaging optical path, thereby improving the accuracy and precision of foreign object detection. When there is a foreign object on the imaging optical path, the detection light will be blocked, and the receiving component 320 can more accurately detect the change in the light intensity.

[0080] It can be understood that this layout makes the installation and maintenance of the transmitting component 310 and the receiving component 320 more convenient. Since they are both disposed between the projection member 110 and the imaging member and are respectively near different positions, a certain component can be processed separately during maintenance without disassembling the entire head-up display 100, thereby improving the maintenance efficiency of the head-up display 100.

[0081] As an implementable embodiment, a light guide member is provided on at least one of the transmitting component 310 and the receiving component 320. The light guide member is used to adjust the optical path of the detection light.

[0082] In some embodiments, as shown in Figures 5 to 6 both the transmitting component 310 and the receiving component 320 are provided on the projection member 110. The projection member 110 includes a first end and a second end which are oppositely arranged. The transmitting component 310 is located at the first end of the projection member 110, and the receiving component 320 is located at the second end of the projection member 110. At this time, the direction of the detection light is perpendicular to the direction of the imaging optical path. At least a part of the optical path of the detection light coincides with the imaging optical path. The overlapping part of the optical path of the detection light and the imaging optical path is shown by the dashed line box A in Figure 5 .

[0083] Considering that the projection member 110 is provided under the instrument panel 200, and the space under the instrument panel 200 is limited. By providing a light guide member on at least one of the transmitting component 310 and the receiving component 320, the light guide member can flexibly adjust the optical path of the detection light to make it coincide with at least a part of the imaging optical path. In this way, the limited space under the instrument panel 200 can be effectively utilized, avoiding occupying too much space under the instrument panel 200, thereby optimizing the space layout.

[0084] Exemplarily, the light guide member can reduce the loss of the detection light during transmission and improve the light efficiency of the foreign object detection device 300. Through the adjustment of the light guide member, the detection light can make the most of the light source, reducing the attenuation and scattering of the light.

[0085] As an implementable embodiment, the transmitting component 310 includes a transmitting housing 311, a light emitting member 313 and a first light guide plate 312. The transmitting housing 311 forms a first cavity. Both the light emitting member 313 and the first light guide plate 312 are located in the first cavity.

[0086] The light emitting end of the light emitting member 313 is connected to the light incident end of the first light guide plate 312. The first light guide plate 312 has at least one bent section. The light emitting member 313 is electrically connected to the detection control member.

[0087] Exemplarily, the transmitting component 310 is provided at the first end of the projection member 110. As shown in Figure 5 , the transmitting housing 311 forms a first cavity. Both the light emitting member 313 and the first light guide plate 312 are located in the first cavity. The first cavity can effectively protect the light emitting member 313 and the first light guide plate 312 from being damaged by the external environment.

[0088] During the use of the foreign object detection device 300, the light emitting member 313 emits detection light, and the detection light is transmitted to the light incident end of the first light guide plate 312 through the light emitting end. The bent section of the first light guide plate 312 can flexibly adjust the optical path of the detection light, enabling the emitting assembly 310 to adapt to different spatial layouts and optical path requirements.

[0089] Exemplarily, the light emitting member 313 includes an LED lamp.

[0090] As an implementable embodiment, the receiving assembly 320 includes a receiving housing 321, a second light guide plate 322, and a receiving member 323. The receiving housing 321 forms a second cavity. Both the second light guide plate 322 and the receiving member 323 are located in the second cavity.

[0091] The second light guide plate 322 has at least one bent section. The light incident end of the second light guide plate 322 faces the emitting assembly 310. The light emitting end of the second light guide plate 322 faces the receiving end of the receiving member 323.

[0092] The receiving member 323 is electrically connected to the detection control member.

[0093] Exemplarily, the receiving assembly 320 is disposed at the second end of the projection member 110. Refer to Figure 5 As shown, the receiving housing 321 forms a second cavity. The receiving member 323 and the second light guide plate 322 are both located in the second cavity, and the second cavity can effectively protect the receiving member 323 and the second light guide plate 322 from damage caused by the external environment.

[0094] During the use of the foreign object detection device 300, the light emitting end of the first light guide plate 312 emits the detection light, and the detection light reaches the light incident end of the second light guide plate 322 through the optical path of the detection light. Among them, before the detection light reaches the light incident end of the second light guide plate 322, the detection light passes through the imaging optical path. The propagation direction of the detection light refers to Figure 6 the direction indicated by the solid black arrow in

[0095] The bent section of the second light guide plate 322 can flexibly adjust the optical path of the detection light, enabling the receiving assembly 320 to adapt to different spatial layouts and optical path requirements.

[0096] Exemplarily, the receiving member 323 includes a photodiode sensor and an infrared sensing chip.

[0097] Exemplarily, the detection control member includes a circuit board.

[0098] As an implementable embodiment, the first light guide plate 312 includes a first light guide segment 312a and a second light guide segment 312b that are connected to each other. The extending direction of the first light guide segment 312a is parallel to the projection surface of the projection member 110. The first light guide segment 312a is disposed on the projection surface. The extending direction of the second light guide segment 312b intersects with the extending direction of the first light guide segment 312a.

[0099] Exemplarily, by setting the extending directions of the first light guide segment 312a and the second light guide segment 312b to intersect with each other, in this way, the propagation optical path of the detection light in the first light guide plate 312 can be flexibly adjusted. At the same time, by setting the first light guide segment 312a to be parallel to the projection surface, it is ensured that the detection light can effectively propagate on the projection surface; and the second light guide segment 312b intersects with the first light guide segment 312a, which can guide the detection light to the required position.

[0100] By disposing the first light guide segment 312a on the projection surface and making its extending direction parallel to the projection surface, the surface space of the projection member 110 can be utilized to the maximum extent, and the occupation of the limited space below the instrument panel 200 can be reduced. This design makes the layout of the head-up display 100 more compact and optimizes the space utilization.

[0101] As an implementable embodiment, the second light guide plate 322 includes a third light guide segment 322a and a fourth light guide segment 322b that are connected to each other. The extending direction of the third light guide segment 322a is parallel to the projection surface of the projection member 110. The third light guide segment 322a is disposed on the projection surface. The extending direction of the fourth light guide segment 322b intersects with the extending direction of the third light guide segment 322a.

[0102] Exemplarily, by setting the extending directions of the third light guide segment 322a and the fourth light guide segment 322b to intersect with each other, the optical path of the detection light can be flexibly adjusted. By setting the third light guide segment 322a to be parallel to the projection surface, it is ensured that the detection light can effectively be transmitted on the projection surface; and the fourth light guide segment 322b intersects with the third light guide segment 322a, and the fourth light guide segment 322b can guide the detection light to the receiving member 323, improving the utilization rate and detection accuracy of the detection light.

[0103] By disposing the third light guide segment 322a on the projection surface and making its extending direction parallel to the projection surface, the surface space of the projection member 110 can be utilized to the maximum extent, and the occupation of the limited space below the instrument panel 200 can be reduced. This design makes the layout of the head-up display 100 more compact and optimizes the space utilization.

[0104] As an implementable embodiment, along the first direction, the sum of the extension lengths of the first light guide plate 312 and the emission housing 311 is less than or equal to 4 mm. The sum of the extension lengths of the second light guide plate 322 and the receiving housing 321 is less than or equal to 4 mm. The first direction is parallel to the projection plane.

[0105] Exemplarily, the first direction is referred to Figure 6 as the X direction shown in [reference], by setting the sum of the extension lengths of the first light guide plate 312 and the emission housing 311 to be less than or equal to 4 mm, and setting the sum of the extension lengths of the second light guide plate 322 and the receiving housing 321 to be less than or equal to 4 mm, strictly controlling the sum of the extension lengths of the first light guide plate 312 and the emission housing 311, and the sum of the extension lengths of the second light guide plate 322 and the receiving housing 321, the space under the instrument panel 200 is reasonably utilized, and function integration can be achieved in an extremely limited space.

[0106] Exemplarily, along the first direction, when the sum of the extension lengths of the first light guide plate 312 and the emission housing 311 is greater than 4 mm, the sum of the extension lengths of the second light guide plate 322 and the receiving housing 321 is greater than 4 mm. In this way, the space occupied during the installation of the foreign object detection device 300 will be increased. Considering the inconsistent sizes of different head-up displays 100, if the foreign object detection device 300 occupies too much space, it is not conducive to the foreign object detection device 300 to adapt to different head-up displays 100.

[0107] As an implementable embodiment, along the direction perpendicular to the projection plane, the sum of the extension lengths of the first light guide plate 312 and the emission housing 311 is less than or equal to 1.5 mm. The sum of the extension lengths of the second light guide plate 322 and the receiving housing 321 is less than or equal to 1.5 mm.

[0108] Exemplarily, by strictly controlling the sum of the extension lengths of the first light guide plate 312 and the emission housing 311 in the direction perpendicular to the projection plane, and the sum of the extension lengths of the second light guide plate 322 and the receiving housing 321 in the direction perpendicular to the projection plane, the space under the instrument panel 200 is reasonably utilized, and function integration can be achieved in an extremely limited space.

[0109] Exemplarily, when the sum of the extension lengths of the first light guide plate 312 and the emission housing 311 in the direction perpendicular to the projection plane is greater than 1.5 mm. The sum of the extension lengths of the second light guide plate 322 and the receiving housing 321 in the direction perpendicular to the projection plane is greater than 1.5 mm. In this way, the space occupied during the installation of the foreign object detection device 300 will be increased. Considering the inconsistent sizes of different head-up displays 100, if the foreign object detection device 300 occupies too much space, it is not conducive to the foreign object detection device 300 to adapt to different head-up displays 100.

[0110] In the above description, it should be understood that unless otherwise clearly specified and defined, the term "connected" should be understood in a broad sense. For example, it can be a fixed connection, or indirectly connected through an intermediate medium, or it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood according to specific circumstances. The orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application. In the description of this application, the meaning of "a plurality of" is two or more, unless otherwise precisely and specifically defined.

[0111] In the description of the specification, claims and the above drawings of this application, the terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them; although this application 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 for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A foreign body detection device, characterized in that: Used for detecting foreign matter between a projection element and an imaging element in a head-up display, wherein an imaging light path is formed between the projection element and the imaging element, and the foreign matter detection device is located in the imaging light path, and the foreign matter detection device comprises: An emitting component is arranged at one end of the imaging light path; the emitting component is used to emit detection light; A receiving component, disposed at the other end of the imaging light path, and configured to receive the detection light; A detection control component, the transmitting component and the receiving component are both electrically connected to the detection control component; Wherein, the optical path of the detection light and the imaging optical path at least partially overlap.

2. The foreign matter detection device according to claim 1, characterized in that: The transmitting component is connected to one of the projecting component and the imaging component, and the receiving component is connected to the other of the projecting component and the imaging component.

3. The foreign matter detection device according to claim 1, characterized in that: The transmitting component and the receiving component are both arranged between the projecting component and the imaging component, the transmitting component is arranged close to one of the projecting component and the imaging component, and the receiving component is arranged close to the other of the projecting component and the imaging component.

4. The foreign body detection device according to any one of claims 1 to 3, characterized in that: A light guide is disposed on at least one of the transmitting component and the receiving component, and the light guide is used to adjust the optical path of the detection light.

5. The foreign matter detection device according to claim 4, characterized in that: The emitting assembly comprises an emitting housing, a light emitting element and a first light guide plate, the emitting housing forms a first cavity, and the light emitting element and the first light guide plate are both located in the first cavity; The light-emitting end of the light-emitting component is connected to the light-incoming end of the first light guide plate, and the first light guide plate has at least one bending section; the light-emitting component is electrically connected to the detection control component.

6. The foreign matter detection device according to claim 5, characterized in that: The receiving assembly comprises a receiving shell, a second light guide plate and a receiving member, the receiving shell forms a second cavity, and the second light guide plate and the receiving member are both located in the second cavity; The second light guide plate has at least one bending section, the light input end of the second light guide plate faces the emitting component, and the light output end of the second light guide plate faces the receiving end of the receiving component; The receiving component is electrically connected to the detection control component.

7. The foreign matter detection device according to claim 6, characterized in that: The first light guide plate comprises a first light guide segment and a second light guide segment connected to each other, the extension direction of the first light guide segment is parallel to the projection plane of the projection element, the first light guide segment is arranged on the projection plane, and the extension direction of the second light guide segment intersects with the extension direction of the first light guide segment; And / or, the second light guide plate includes a third light guide segment and a fourth light guide segment that are interconnected, the extension direction of the third light guide segment is parallel to the projection plane of the projection element, the third light guide segment is arranged on the projection plane, and the extension direction of the fourth light guide segment intersects with the extension direction of the third light guide segment.

8. The foreign matter detection device according to claim 7, characterized in that: Along the first direction, the sum of the extended lengths of the first light guide plate and the emitting housing is less than or equal to 4 mm; the sum of the extended lengths of the second light guide plate and the receiving housing is less than or equal to 4 mm; the first direction is parallel to the projection plane; And / or, along a direction perpendicular to the projection plane, the sum of the extension lengths of the first light guide plate and the emitting housing is less than or equal to 1.5 mm; the extension lengths of the second light guide plate and the receiving housing is less than or equal to 1.5 mm.

9. A head-up display, characterized in that: It comprises a projection component, an imaging component, a control component and a foreign object detection device as described in any one of claims 1 to 8, an imaging light path is formed between the projection component and the imaging component, the foreign object detection device is located in the imaging light path, and the foreign object detection device is electrically connected to the control component.

10. A vehicle, characterized in that: The vehicle comprises a cockpit, a windshield and the head-up display according to claim 9, wherein the windshield is arranged in the cockpit and is opposite to the driving position of the cockpit, and the head-up display is arranged in the cockpit; A display surface of the head-up display faces the driving seat of the vehicle.

Images