CN110027410B - Display method and device of vehicle-mounted head-up display - Google Patents
Display method and device of vehicle-mounted head-up display Download PDFInfo
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Abstract
The invention discloses a display method of vehicle-mounted head-up display, which comprises the following steps: step S1, initializing the system; step S2, collecting and receiving information, including OBD data collection, illumination intensity identification, rearview mirror host information transmission and external equipment information access; step S3, information processing and conversion, processing the collected information and converting the information into output information for output; step S4, adjusting the display effect of the output information, and adjusting the display effect of the output information through a display enhancement algorithm and light intensity change self-adaption; in step S5, the content is displayed, and the HUD content is displayed on the adjusted output information. The invention solves the defects of display blind area, display ghost image, fuzziness and capability of only displaying icons and numbers in the existing head-up display; optimizing the display effect by adopting a display enhancement algorithm; can throw the screen display with multiple information and show, the driver of being convenient for looks over, avoids the potential safety hazard.
Description
Technical Field
The invention relates to the technical field of head-up display, in particular to a display method and device of vehicle-mounted head-up display.
Background
At present, the quantity of vehicles in China is about 4 hundred million, and the number of vehicles per year is increased by tens of millions, so that with the increase of private vehicles, casualties and property losses caused by traffic accidents are many hundreds of thousands of times per year. The accident rate is the largest, and the accidents are caused by looking up the speed and the rotating speed of the vehicle in a head-down mode and looking up and operating the mobile phone for distraction. At present, in order to solve the potential safety hazard, the liquid crystal display technology of the fighter is applied to vehicles in the field of vehicle-mounted electronics.
Traditional new line display device (HUD) mainly places the central control position in driver's dead ahead car, arranges car windshield below in, shows through section code display screen (LED), projects the display content on front windshield, and this technique can not show complicated driving information and graphic image, can accomplish at present with speed of a motor vehicle, rotational speed, navigation instruction and apart from information reflection to front windshield on. The existing head-up display technology has the following problems: 1. only simple icons and numbers can be displayed, and the whole picture and the navigation map cannot be displayed; 2. fuzzy display in daytime and dazzling display at night; 3. the transparent liquid crystal display shields the sight; 4. the font of the front windshield is blurred and blurred, and a display image is deformed by the reflection of the segment type LED screen; 5. in order to increase the display effect, a layer of reflective film needs to be added to the front barrier, and the front sight can be blocked after the reflective film is added, so that a visual blind area is easily caused, and potential safety hazards are caused.
Therefore, the prior art is not sufficient and needs to be improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a display method and a device for vehicle-mounted head-up display.
The technical scheme of the invention is as follows: the display method for the vehicle-mounted head-up display comprises the following steps:
step S1, initializing the system;
step S2, collecting and receiving information, including OBD data collection, illumination intensity identification, rearview mirror host information transmission and external equipment information access;
step S3, information processing and conversion, processing the collected information and converting the information into output information for output;
step S4, adjusting the display effect of the output information, and adjusting the display effect of the output information through a display enhancement algorithm and light intensity change self-adaption;
in step S5, the content is displayed, and the HUD content is displayed on the adjusted output information.
The implementation of the enhancement algorithm shown in step S4 includes the following steps:
step S41, HUD content display;
step S42, displaying feedback, feeding back whether the display content needs to be adjusted, entering the next step if the display content does not need to be adjusted, carrying out reverse adjustment if the display content needs to be adjusted, and entering the next step after the reverse adjustment is finished;
and step S43, confirming the display effect, confirming whether the display effect of the display content is correct, if so, displaying, and if not, returning to the step S42.
Further, the process of adapting to the light intensity variation in step S4 includes the following steps:
step Q1, collecting the real-time light intensity of the environment;
step Q2, grading the ambient light intensity and the backlight brightness, wherein different ambient light intensities correspond to different backlight brightness;
and step Q3, adjusting the backlight brightness level according to the grading of the ambient light intensity.
Further, in the step S2, in the OBD data acquisition process, the system reads data in the traveling computer through the vehicle-mounted OBD interface, and analyzes the OBD data into corresponding vehicle information, where the vehicle information includes vehicle speed, rotational speed, tire pressure, tire temperature, engine oil, gasoline, and fault code.
The illumination intensity identification process is to collect the real-time illumination intensity of the environment through a photosensitive sensor and transmit the real-time illumination intensity to the system.
And the information transmission of the rearview mirror host machine is realized by acquiring the environmental information at the rear of the vehicle through the rearview mirror host machine and transmitting the environmental information to the HUD for displaying.
The external device information receiving process is to transmit the information of the external device to the HUD for display through a wireless communication mode.
Further, the reverse adjustment in step S42 is to adjust the angle and direction of the HUD so that the display screen of the HUD remains parallel to the plane of the windshield.
Further, the adjusting the display effect in step S4 further includes switching different background contrast ratios according to the system time.
The present invention also provides a vehicle-mounted head-up display device, including: microcontroller, photosensitive sensor, rear-view mirror host computer, wireless data transmission module, OBD communication analysis module, on-vehicle OBD interface, display module. The photosensitive sensor is used for acquiring the real-time illumination intensity of the environment and sending the acquired information to the microcontroller; the rearview mirror host is used for acquiring environmental information behind the vehicle and sending the acquired information to the microcontroller; the OBD communication analysis module acquires corresponding vehicle data through a vehicle-mounted OBD interface and sends the vehicle data to the microcontroller; the wireless data transmission module is used for realizing data transmission between the microcontroller and external equipment; the microcontroller is used for receiving the data signals transmitted by the photosensitive sensor, the rearview mirror host, the OBD communication analysis module and the wireless data transmission module, processing the data signals, converting the data signals into output information and displaying the output information through the display module; the display module is used for displaying the output information transmitted by the microcontroller; microcontroller respectively with rear-view mirror host computer, photosensitive sensor, wireless data transmission module, OBD communication analysis module, and display module communication connection, on-vehicle OBD interface with OBD communication analysis module communication connection.
Further, the OBD communication analysis module includes the CAN bus, on-vehicle OBD interface connection is in on the CAN bus, the rear-view mirror host computer pass through hardware communication interface with microcontroller communication connection, hardware communication interface is the UART serial ports.
Further, the output information includes: one or more of symbol information, graphic information, character information and digital information.
Furthermore, the display module comprises a backlight source and a liquid crystal display screen.
Further, the wireless data transmission module is a bluetooth module or a WIFI module.
By adopting the scheme, the head-up display method can overcome the influence on a blind area of a driver caused by the screen of the central control part, and can also overcome the defects that the reflective head-up display equipment below the front windshield displays double images and fuzziness and can only display icons and numbers; the head-up display is adjusted to a better display effect by adopting a display enhancement algorithm, a driver can adjust the angle and direction of the display by displaying a touch screen through a host or connecting the display with the HUD through a wireless data transmission part, the HUD is always kept parallel to the plane of a front windshield, and the display effect is optimized; the vehicle information, the navigation information, the mobile phone information and the like can be put on the front windshield of the vehicle, so that a driver can conveniently check the vehicle information, and potential safety hazards are avoided.
Drawings
FIG. 1 is a flow chart of a vehicle head-up display method of the present invention;
FIG. 2 is a flow chart of a display enhancement algorithm in the vehicle head-up display method of the present invention;
FIG. 3 is a flow chart of light intensity variation adaptation in the display method of the vehicle-mounted heads-up display according to the present invention;
FIG. 4 is a schematic view of HUD projection in the vehicle-mounted heads-up display method of the present invention;
FIG. 5 is a schematic diagram illustrating a distortion effect displayed in a prior art vehicle head-up display;
fig. 6 is a schematic diagram of a frame of the vehicle-mounted head-up display device according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Referring to fig. 1 to 5, the present invention provides a vehicle head-up display method, including the following steps:
step S1, initializing the system, and initializing each module in the system.
And step S2, collecting and receiving information, including OBD data collection, illumination intensity identification, rearview mirror host information transmission and external equipment information reception. Specifically, in this embodiment, OBD data acquisition is realized through the connection of on-vehicle ODB interface HUD and driving computer (ECU) of car, and then the system can conveniently read in the vehicle ECU about speed of a motor vehicle, rotational speed, tire pressure, machine oil, petrol, tire temperature, fault code etc. but not limited to these parameters pass through the OBD communication analysis module and resolve the OBD data into corresponding vehicle information. Specifically, in this embodiment, illumination intensity identification process is through the real-time illumination intensity of photosensitive sensor collection environment, transmits to HUD and carries out illumination intensity identification, carries out HUD luminance's adjustment in a poor light through discernment environment illumination intensity to reach best display effect. Specifically, in this embodiment, the information transmission of the rearview mirror host is that the rearview mirror main body is connected with the HUD of the present invention through a UART serial port, wherein the information transmission of the host transmits data or a control command that needs to be displayed by the HUD and is sent by the rearview mirror host. The rearview mirror host collects environmental information (including vehicle speed/rotating speed, navigation information and other information inconvenient to see on a rearview mirror LCD) at the rear of the vehicle and transmits the information to the HUD for display, and inconvenience and potential safety hazards caused by frequent checking of rearview mirrors by a driver are avoided. The host computer is in communication connection with the HUD through the UART serial port or the USB interface, and the navigation picture and the startup welcome page on the host computer are displayed on the HUD. Specifically, in this embodiment, the external device information receiving process is connected with external devices such as cell-phones through wireless communication methods such as bluetooth module or WIFI module, and the HUD can acquire the information in the cell-phone through the ANCS protocol and throw the content in the cell-phone on the screen and show, can project the screen of cell-phone on the display screen of HUD, perhaps show incoming telegram, information (like little letter) etc. on the display screen of HUD, make things convenient for the driver to look over the cell-phone, avoid the potential safety hazard because of operating the cell-phone and bringing.
Step S3, processing and converting the information, wherein the microcontroller in the HUD processes the acquired information and converts the information into one or more output information of symbols, graphs, characters and numbers for output, and the information is projected on a screen for display;
and step S4, adjusting the display effect and adjusting the display effect of the output information. Because the front windshield of every car factory motorcycle type is the inclined plane, the plane that HUD arrived front windshield is not parallel, in addition because the front windshield of some motorcycle types still divides the monolayer, the bilayer, different car owners still can carry out the pad pasting to front windshield, the one deck has the condition of pasting two-layer again, HUD can arouse the ghost image through multilayer reflection and refraction like this, again paste a layer reflective membrane and revise, simultaneously because the front windshield is the slope, the content that leads to the projection to go out is distortion slope, as shown in figure 5, throw one "H" from the HUD position, the oblique angle through the front windshield and the reflection and refraction of glass pad pasting show final deformation distortion "A", or "A" falls ", so need show the regulation. Specifically, in the present embodiment, the display effect of the output information is adjusted by a display enhancement algorithm and light intensity variation adaptation.
As shown in fig. 2, which is a flow chart of the display enhancement algorithm, the implementation of the display enhancement algorithm includes the following steps: step S41, HUD content display; and step S42, displaying feedback, feeding back whether the display content needs to be adjusted, entering the next step if the display content does not need to be adjusted, carrying out reverse adjustment if the display content needs to be adjusted, and entering the next step after the reverse adjustment is finished. The reverse adjustment is to adjust the angle and direction of the HUD display screen so that the HUD display screen remains parallel to the plane of the front windshield (as shown in fig. 4). And step S43, confirming the display effect, confirming whether the display effect of the display content is correct, if so, displaying, and if not, returning to the step S42. Specifically, the user can adjust the display effect according to the HUD, for example, see the distorted and distorted "a" before the HUD is projected, and then determine that the display effect needs to be adjusted according to the display feedback of step S42, and then change the "H" in the display of the customized LCD in the HUD to the inverted "a", so that the projected display effect is just cancelled, and then confirm the display effect until the display angle is adjusted to a better display angle.
As shown in fig. 3, the process of adaptive illumination intensity specifically includes the following steps: step Q1, collecting the real-time light intensity of the environment, and collecting the change of the light intensity of the environment by the system through a photosensitive sensor; step Q2, grading the ambient light intensity and the backlight brightness, wherein different ambient light intensities correspond to different backlight brightness; grading the ambient light intensity from 0X00-0XFF, wherein different ambient light intensities correspond to different backlight brightness, and correspondingly, the backlight brightness is graded into 0X00-0XFF (255) grades corresponding to different ambient light intensities; and step Q3, adjusting the backlight brightness level according to the grading of the ambient light intensity, wherein the stronger the illumination is, the stronger the backlight needs to be adjusted, and meanwhile, the displayed contrast also highlights the effects of the background and the displayed font, and the effect of highlighting the display. The adjusting the display effect in step S4 further includes switching different background contrast ratios according to the system time. For example, two different background contrasts can be switched according to day and night, the contrast of the background color and the display content is adjusted to a higher position in the day, the background color and the display content are adjusted to be softer at night, the driving and the road surface observation are facilitated, and the eye fatigue caused by the long-time observation of eyes is avoided.
In step S5, the content is displayed, and the HUD content is displayed on the adjusted output information. By adjusting the display effect, the head-up display picture is more friendly and visual, the blind area is not caused, and the driver can conveniently check the head-up display picture.
Referring to fig. 6, the present invention further provides a vehicle-mounted head-up display device, including: microcontroller 1, photosensitive sensor 2, rear-view mirror host computer 3, wireless data transmission module 4, OBD communication analysis module 5, on-vehicle OBD interface 6, display module 7. Photosensitive sensor 2 for gather the real-time illumination intensity of external environment, and with the information transmission who gathers give microcontroller 1, microcontroller 1 can adjust HUD luminance in a poor light according to the luminous intensity change of external environment, makes display effect better. Rearview mirror host computer 3 for gather the environmental information at vehicle rear, and with the information routing who gathers give microcontroller 1, rearview mirror host computer 3 through hardware communication interface 8 (like the UART serial ports) with 1 communication connection of microcontroller, through rearview mirror host computer 3 throws the screen with the environmental information at vehicle rear on HUD, makes things convenient for the driver to look over the vehicle rear condition, avoids frequently looking over inconvenience and the potential safety hazard that the rear-view mirror brought. OBD communication analysis module 5, through vehicle-mounted CDB interface 6 acquires corresponding vehicle data, and sends for microcontroller 1, OBD communication analysis module 5 includes the CAN bus, vehicle-mounted OBD interface 6 connects on the CAN bus. And the vehicle-mounted OBD interface 6 is used for realizing the communication connection between the OBD communication analysis module 5 and an automobile computer (ECU). The wireless data transmission module 4 is used for realizing data transmission between the microcontroller 1 and the external device 9, the wireless data transmission module 4 is a bluetooth module or a WIFI module, and transmits information on the external device to the microcontroller 1 through bluetooth or WIFI. Specifically, in this embodiment the external device 9 is a mobile phone, and the HUD can acquire information in the mobile phone through the ANCS protocol and project contents in the mobile phone to the display module 7 for display, and can project the screen of the mobile phone to the HUD, or display incoming calls, information (such as WeChat) and the like on the display module 7 of the HUD, so that a driver can conveniently check the mobile phone, and potential safety hazards caused by operating the mobile phone are avoided. The display module 7 is configured to display the output information transmitted by the microcontroller 1, where the display module 7 includes a backlight source and a Liquid Crystal Display (LCD), and specifically, the backlight source is an LED backlight source in this embodiment. Microcontroller 1 for receive photosensitive sensor 2, rear-view mirror host computer 3, OBD communication analysis module 5 and wireless data transmission module 4's data signal, handle data signal and convert into behind the output information through display module 7 throws the screen display and shows. The output information includes: one or more of symbol information, graphic information, character information and digital information. Microcontroller 1 respectively with rear-view mirror host computer 3, photosensitive sensor 2, wireless data transmission module 4, 5 communication connection of OBD communication analysis module, on-vehicle OBD interface 6 with 5 communication connection of OBD communication analysis module, wireless data transmission module 4 with 9 communication connection of external equipment. When in use, the specific display flow comprises the following steps:
in step S1, each module in the system is initialized.
And step S2, acquiring and receiving information, wherein the OBD communication analysis module 5 reads data in a traveling computer through the vehicle-mounted OBD interface 6, and converts the OBD data into vehicle data (such as vehicle speed, rotating speed, tire pressure, engine oil, gasoline, tire temperature and fault codes) to be output. The photosensitive sensor 2 collects the real-time illumination intensity of the environment, transmits the real-time illumination intensity to the microcontroller 1 for illumination intensity identification, and adjusts the brightness of the display module 7 by identifying the ambient illumination intensity so as to achieve the best display effect. The rearview mirror host 3 collects vehicle rear environment information and transmits the vehicle rear environment information to the microcontroller 1 for processing and displaying the vehicle rear condition, so that inconvenience and potential safety hazard caused by frequent checking of rearview mirrors by a driver are avoided. Through wireless data transmission module 4 will the information transmission of external equipment 9 extremely microcontroller 1 throws the screen and shows, can project the screen of cell-phone on display module 7, perhaps show incoming telegram, information (like little letter) etc. on HUD display module 7 is last, makes things convenient for the driver to look over the cell-phone, avoids the potential safety hazard because of operating the cell-phone and bringing.
Step S3, information processing and conversion, the microcontroller 1 processes the collected information and converts the information into one or more output information of symbols, graphs, characters and numbers for output, and the information is projected on the display module 7 for display;
and step S4, adjusting the display effect and adjusting the display effect of the output information. The angle and the direction of the display module 7 are adjusted by the microcontroller 1 according to whether the display effect is correct or not, so that the display module 7 is kept parallel to the plane of the front windshield, and a better display effect is obtained. Simultaneously through microcontroller 1 is right according to the real-time luminous intensity of environment that photosensitive sensor 2 gathered the display module 7 the luminance of backlight is adjusted, switches two kinds of different background contrast according to evening daytime again, and the higher position is transferred to with background color display content contrast daytime, and night is softer with the adjustment of background color display content, is convenient for drive observation road surface, avoids eyes to observe for a long time and causes eye fatigue.
And step S5, displaying the content, namely displaying the output information adjusted by the microcontroller 1 through the display module 7, so that the head-up display picture is more friendly and intuitive, a blind area cannot be caused, and the driver can conveniently check the information.
In conclusion, the head-up display method can overcome the influence on a blind area of a driver caused by the screen of the central control part, and can also overcome the defects that the reflective head-up display equipment below the front windshield displays double images and fuzziness and can only display icons and numbers; the head-up display is adjusted to a better display effect by adopting a display enhancement algorithm, a driver can adjust the angle and direction of the display by displaying a touch screen through a host or connecting the display with the HUD through a wireless data transmission part, the HUD is always kept parallel to the plane of the front windshield, and the display effect is optimized; the vehicle information, the navigation information, the mobile phone information and the like can be put on the front windshield of the vehicle.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A display method of vehicle-mounted head-up display is characterized by comprising the following steps:
step S1, initializing the system;
step S2, collecting and receiving information, including OBD data collection, illumination intensity identification, rearview mirror host information transmission and external equipment information access;
step S3, information processing and conversion, processing the collected information and converting the information into output information for output;
step S4, adjusting the display effect of the output information, and adjusting the display effect of the output information through a display enhancement algorithm and light intensity change self-adaption;
step S5, displaying content, and displaying HUD content of the adjusted output information;
the implementation of the enhancement algorithm shown in step S4 includes the following steps:
step S41, HUD content display;
step S42, displaying feedback, and feeding back whether the display content needs to be adjusted, if the display content does not need to be adjusted, entering the next step, and if the display content needs to be adjusted, adjusting, where the display content needing to be adjusted includes: the HUD may cause ghosting through multiple layers of reflection and refraction, the projected content being skewed; entering the next step after the adjustment is completed; the regulation is as follows: the method comprises the steps that a user adjusts the display effect according to the condition of the HUD, when an 'H' is projected from the position of the HUD, an 'A' which shows deformation distortion is seen in front of the HUD, the display effect is determined to be adjusted according to display feedback, the 'H' in the display of a customized LCD in the HUD is correspondingly changed into an 'A' to enable the projected display effect to be exactly offset, and then the display effect is confirmed until a better display angle is adjusted;
step S43, confirming the display effect, confirming whether the display effect of the display content is correct, if the display is correct, displaying, and if the display is incorrect, returning to the step S42;
the process of adapting the light intensity variation in step S4 includes the following steps:
step Q1, collecting the real-time light intensity of the environment;
step Q2, grading the ambient light intensity and the backlight brightness, wherein different ambient light intensities correspond to different backlight brightness;
and step Q3, adjusting the backlight brightness level according to the grading of the ambient light intensity.
2. The method for displaying the vehicle-mounted head-up display according to claim 1, wherein in the step S2, in the OBD data acquisition process, a system reads data in a traveling computer through a vehicle-mounted OBD interface, and analyzes the OBD data into corresponding vehicle information, wherein the vehicle information includes a vehicle speed, a rotation speed, a tire pressure, a tire temperature, engine oil, gasoline and a fault code;
the illumination intensity identification process is to collect the real-time illumination intensity of the environment through a photosensitive sensor and transmit the real-time illumination intensity to a system;
the rearview mirror host information transmission is that the rearview mirror host collects the environmental information behind the vehicle and transmits the environmental information to the HUD for display;
the external device information receiving process is to transmit the information of the external device to the HUD for display through a wireless communication mode.
3. The method for displaying the vehicle-mounted head-up display according to claim 1, wherein the adjusting the display effect in step S4 further comprises switching different background contrasts according to a system time.
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| CN113433695A (en) * | 2021-06-25 | 2021-09-24 | 杭州炽云科技有限公司 | Head-up display method and system based on WHUD |
| CN113377202B (en) * | 2021-06-25 | 2023-07-07 | 杭州炽云科技有限公司 | Head-up display method and system based on ARHUD |
| CN115225875B (en) * | 2022-06-17 | 2023-12-01 | 苏州蓝博控制技术有限公司 | Display method of auxiliary display device of excavator |
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| CN102791509A (en) * | 2010-03-11 | 2012-11-21 | 丰田自动车株式会社 | Image position adjustment device |
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