Foreign matter detection device for head-up display
By designing a foreign object detection device for a head-up display, using the combination of infrared light and light guides, the detection and reminding of foreign objects on the HUD surface is achieved, and the problem of the inability to detect and remind foreign objects on the HUD surface in the prior art is solved. Improved driving safety.
Patent Information
- Application Number
- CN202311052819.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-21
- Publication Date
- 2025-02-21
AI Technical Summary
In the prior art, the head-up display cannot detect and remind the driver that there are foreign objects on the HUD surface, resulting in incomplete display of the screen, which may cause safety hazards.
A foreign object detection device is designed, including an infrared emitter, an infrared photoelectric receiving converter, a light guide and a reminder device. IR light is emitted through infrared transmitters, and the light guides are used to convert the light angle. The infrared photoelectric reception converter receives light. The controller determines whether there are foreign objects on the glass surface and reminds driving through reminders (such as voice playback devices or buzzers) The worker cleans up foreign objects.
Effectively detect whether there are foreign objects on the surface of the HUD, and promptly remind the driver to clean it up to prevent incomplete screen display and avoid safety hazards.
Smart Images
Figure CN119493185A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of physics, in particular to HUD technology, and more particularly to a foreign body detection device for a head-up display. Background Art
[0002] HUD (Head Up Display) is the mainstream automotive auxiliary equipment in the future. It can project some auxiliary driving information (such as vehicle speed, navigation, fuel consumption, speed, etc.) onto the windshield through optical projection. The driver can obtain this information without looking down at the dashboard, thereby improving driving safety. In the prior art, with the gradual popularization of vehicle-mounted HUD, more and more driving-related information is displayed on the windshield, and the safety of HUD has become more and more important. Foreign objects blocking the surface of HUD is one of the more serious safety hazards. The existing HUD cannot detect and remind the driver that there are foreign objects on the surface of HUD. Once the surface of HUD is blocked by foreign objects, the picture display will be incomplete and unclear, causing the driver to be unable to see the driving-related information during driving, which is prone to safety problems. Summary of the invention
[0003] The object of the present invention is to provide a foreign object detection device for a head-up display, which is intended to solve the technical problem in the prior art that the HUD cannot detect and remind the driver that there are foreign objects on the surface of the HUD.
[0004] A foreign body detection device for a head-up display of the present invention comprises a base, a controller, and a reminder device, wherein an infrared transmitter is arranged at the lower side of the left end of the base, an infrared photoelectric receiving converter is arranged at the lower side of the right end of the base, glass is arranged at the upper side of the base, a first cover shell and a second cover shell are arranged at the left and right sides of the base respectively, a first light guide and a second light guide are arranged between the base and the first cover shell, the first light guide is located below the second light guide, a third light guide and a fourth light guide are arranged between the base and the second cover shell, the third light guide is located above the fourth light guide, and the first light guide, the second light guide, and the third light guide are arranged at the upper side of the base. The light guide and the fourth light guide each have a light incident surface and a light emitting surface, the light incident surface of the first light guide is arranged opposite to the emitting end of the infrared transmitter, the light emitting surface of the first light guide is arranged opposite to the light incident surface of the second light guide, the light incident surface of the second light guide and the light incident surface of the third light guide are arranged opposite to each other and are both located on the upper side of the glass, the light incident surface of the third light guide is arranged opposite to the light incident surface of the fourth light guide, the light incident surface of the fourth light guide is arranged opposite to the receiving end of the infrared photoelectric receiving converter, and the control end of the reminder device, the control end of the infrared transmitter, and the output end of the infrared photoelectric receiving converter are all connected to the signal end of the controller.
[0005] Furthermore, the infrared emitter is an infrared light emitting diode.
[0006] Furthermore, the reminder device is a voice playing device or a buzzer.
[0007] Furthermore, the light emitting surface of the second light guide member and the light incident surface of the third light guide member are both perpendicular to the glass surface.
[0008] Furthermore, the first light guide member and the second light guide member are composed of a fifth light guide member, and the third light guide member and the fourth light guide member are composed of a sixth light guide member.
[0009] Compared with the prior art, the present invention has a positive and obvious effect. When there is foreign matter on the glass surface and the foreign matter blocks the light emitted by the infrared transmitter, the infrared photoelectric receiving converter cannot receive the infrared light, and the controller determines that there is foreign matter on the glass surface, sends a signal to control the voice playing device to play the voice, reminding the driver to clean up the foreign matter in time, preventing the screen from being incomplete, and avoiding safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a first cross-sectional schematic diagram of a foreign object detection device for a head-up display of the present invention.
[0011] Figure 2 It is a second cross-sectional schematic diagram of a foreign object detection device for a head-up display of the present invention.
[0012] Figure 3 The figure is a cross-sectional schematic diagram of an embodiment of a foreign object detection device for a head-up display according to the present invention. DETAILED DESCRIPTION
[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the embodiments, and all similar structures and similar variations of the present invention should be included in the protection scope of the present invention. The use of directions such as up, down, front, back, left, and right in the present invention is only for the convenience of description and is not a limitation on the technical solution of the present invention.
[0014] like Figure 1-Figure 3As shown, a foreign body detection device for a head-up display of the present invention comprises a base 6, a controller, and a reminder device. An infrared transmitter 1 is arranged on the lower left side of the base 6, an infrared photoelectric receiving converter 7 is arranged on the lower right side of the base 6, a glass 5 is arranged on the upper side of the base 6, a first cover shell 3 and a second cover shell 10 are arranged on the left and right sides of the base 6 respectively, a first light guide 2 and a second light guide 3 are arranged between the base 6 and the first cover shell 3, the first light guide 2 is located below the second light guide 3, a third light guide 9 and a fourth light guide 8 are arranged between the base 6 and the second cover shell 10, the third light guide 9 is located above the fourth light guide 8, and the first light guide 2, the second light guide 3 and the third light guide 9 are arranged between the base 6 and the second cover shell 10. The light guide 3, the third light guide 9, and the fourth light guide 8 each have a light incident surface and a light emitting surface. The light incident surface of the first light guide 2 is arranged opposite to the emitting end of the infrared emitter 1, the light emitting surface of the first light guide 2 is arranged opposite to the light incident surface of the second light guide 3, the light emitting surface of the second light guide 3 and the light incident surface of the third light guide 9 are arranged opposite to each other and are both located on the upper side of the glass 5, the light emitting surface of the third light guide 9 is arranged opposite to the light incident surface of the fourth light guide 8, and the light emitting surface of the fourth light guide 8 is arranged opposite to the receiving end of the infrared photoelectric receiving converter 7. The control end of the reminder device, the control end of the infrared emitter 1, and the output end of the infrared photoelectric receiving converter 7 are all connected to the signal end of the controller.
[0015] Furthermore, the infrared transmitter 1 is an infrared light emitting diode.
[0016] Furthermore, the reminder device is a voice playing device or a buzzer.
[0017] Furthermore, the light emitting surface of the second light guide member 3 and the light incident surface of the third light guide member 9 are both perpendicular to the surface of the glass 5 .
[0018] Furthermore, the first light guide member 2 and the second light guide member 3 are composed of a fifth light guide member 11, and the third light guide member 9 and the fourth light guide member 8 are composed of a sixth light guide member.
[0019] Specifically, the controller, infrared transmitter 1, infrared photoelectric receiving converter 7, light guide, infrared light emitting diode, voice playback device, buzzer, etc. in this embodiment all adopt well-known solutions in the prior art, which are well understood by those skilled in the art and will not be repeated here.
[0020] The working principle of this embodiment:
[0021] The infrared emitter 1 emits infrared light, which enters the light incident surface of the second light guide 3 from the light incident surface and the light exit surface of the first light guide 2, and is emitted to the right from the light exit surface of the second light guide 3 in a direction parallel to the upper surface of the glass 5, and enters the light incident surface of the third light guide 9, and then passes through the light exit surface of the third light guide 9, the light incident surface and the light exit surface of the fourth light guide 8, and is received by the infrared photoelectric receiving converter 7 and converted into a signal and sent to the controller. The infrared light on the surface of the glass 5 covers the projection range of the HUD. When there is foreign matter on the surface of the glass 5 and the foreign matter blocks the light emitted by the infrared emitter 1, the infrared photoelectric receiving converter 7 cannot receive the infrared light, and the controller determines that there is foreign matter on the surface of the glass 5, and sends a signal to control the voice playback device to play the voice, reminding the driver to clean up the foreign matter in time, to prevent the screen from being incomplete, and to avoid safety hazards.
[0022] The infrared transmitter 1 and the infrared photoelectric receiving converter 7 are arranged at the bottom of the base 6. The light angle is converted by 180 degrees through various light guides, which can reduce the space occupied in the length direction and improve the compatibility of the device.
Claims
1. A foreign body detection device for a head-up display, characterized in that: The invention comprises a base, a controller and a reminder device, wherein an infrared transmitter is arranged on the lower left side of the base, an infrared photoelectric receiving converter is arranged on the lower right side of the base, glass is arranged on the upper side of the base, a first cover shell and a second cover shell are arranged on the left and right sides of the base respectively, a first light guide and a second light guide are arranged between the base and the first cover shell, the first light guide is located below the second light guide, a third light guide and a fourth light guide are arranged between the base and the second cover shell, the third light guide is located above the fourth light guide, and the first light guide, the second light guide, the third light guide and the fourth light guide are respectively It has a light incident surface and a light emitting surface, the light incident surface of the first light guide is arranged opposite to the emitting end of the infrared transmitter, the light emitting surface of the first light guide is arranged opposite to the light incident surface of the second light guide, the light emitting surface of the second light guide and the light incident surface of the third light guide are arranged opposite to each other and are both located on the upper side of the glass, the light incident surface of the third light guide is arranged opposite to the light incident surface of the fourth light guide, the light incident surface of the fourth light guide is arranged opposite to the receiving end of the infrared photoelectric receiving converter, and the control end of the reminding device, the control end of the infrared transmitter, and the output end of the infrared photoelectric receiving converter are all connected to the signal end of the controller.
2. A foreign body detection device for a head-up display according to claim 1, characterized in that: The infrared emitter is an infrared light emitting diode.
3. The foreign object detection device for a head-up display according to claim 1, characterized in that: The reminder device is a voice playing device or a buzzer.
4. The foreign object detection device for a head-up display according to claim 1, characterized in that: The light emitting surface of the second light guide member and the light incident surface of the third light guide member are both perpendicular to the glass surface.
5. The foreign object detection device for a head-up display according to claim 1, characterized in that: The first light guide and the second light guide are composed of a fifth light guide, and the third light guide and the fourth light guide are composed of a sixth light guide.