CN111179881A - Method, device and system for adjusting brightness of vehicle-mounted display screen, automobile and controller - Google Patents
Method, device and system for adjusting brightness of vehicle-mounted display screen, automobile and controller Download PDFInfo
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- CN111179881A CN111179881A CN202010069774.5A CN202010069774A CN111179881A CN 111179881 A CN111179881 A CN 111179881A CN 202010069774 A CN202010069774 A CN 202010069774A CN 111179881 A CN111179881 A CN 111179881A
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
Abstract
The invention aims to provide a method, a device, a system, an automobile and a controller for adjusting the brightness of a vehicle-mounted display screen, so as to realize dynamic partition adjustment of the brightness of the vehicle-mounted display screen and achieve the effects of reducing energy consumption and improving user experience. The method for adjusting the brightness of the vehicle-mounted display screen comprises the following steps: detecting whether a first user sight angle under a driving state condition is aligned to a vehicle-mounted display screen; when the alignment is carried out, determining a corresponding attention area of a first user sight angle on the vehicle-mounted display screen; acquiring the ambient light brightness of the current environment of the vehicle; and adjusting the brightness of the attention area according to the ambient light brightness.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a method, a device and a system for adjusting brightness of a vehicle-mounted display screen, an automobile and a controller.
Background
Along with the popularization of intelligent automobiles, the size of a vehicle-mounted display screen is larger and larger, the brightness of the display screen is continuously improved, the interference of various display information and light pollution to a driver is more and more serious, and the power consumption of the screen is higher and higher. For better driving experience, large-size display screens in vehicles need to be displayed and brightness managed.
The existing display screen can only realize integral brightness and display adjustment according to ambient light change. The large-area display content affects the attention of the driver, and the light pollution generated by the display screen also seriously affects the driving comfort; although the prior art can improve the complaint influence by integrally reducing and adjusting the screen brightness, the scheme still has display information interference and screen light pollution, and the readability of the display screen is also reduced after the screen brightness is integrally reduced, and a driver spends more time reading the display screen information, so that the driving safety is also influenced.
Disclosure of Invention
The invention aims to provide a method, a device, a system, an automobile and a controller for adjusting the brightness of a vehicle-mounted display screen, so as to realize dynamic partition adjustment of the brightness of the vehicle-mounted display screen and achieve the effects of reducing energy consumption and improving user experience.
The technical scheme of the invention is as follows:
the invention provides a method for adjusting the brightness of a vehicle-mounted display screen, which comprises the following steps:
detecting whether a first user sight angle under a driving state condition is aligned to a vehicle-mounted display screen;
when the alignment is carried out, determining a corresponding attention area of a first user sight angle on the vehicle-mounted display screen;
acquiring the ambient light brightness of the current environment of the vehicle;
and adjusting the brightness of the attention area according to the ambient light brightness.
Preferably, before the step of detecting whether the first user gaze angle is directed at the in-vehicle display screen, the method further comprises:
when the current ambient light brightness of the vehicle is lower than a preset threshold value, starting a first mode, wherein the first mode is used for indicating that the brightness of the vehicle-mounted display screen is dynamically adjusted under the condition of specific ambient light brightness; or receiving an instruction input by a user, and starting a second mode, wherein the second mode is used for indicating that the brightness of the vehicle-mounted display screen is dynamically adjusted under any ambient light brightness condition;
establishing a first coordinate system by taking the eyeballs of the user as an origin, taking the transverse direction perpendicular to the vehicle-mounted display screen as an x-axis and taking the longitudinal direction as a y-axis;
guiding a user to observe each corner point of the vehicle-mounted display screen, and collecting second user sight angles corresponding to different corner points, wherein the second user sight angles comprise: the angle of the user's gaze relative to the x-axis and the angle of the user's gaze relative to the y-axis;
forming a user visible area according to the second user sight angle corresponding to each corner point; the user visible area represents the maximum visible range of the user eyeballs for the vehicle-mounted display screen under the condition of the simulated driving state.
Preferably, the step of detecting whether the line of sight of the user is aligned with the vehicle-mounted display screen comprises:
acquiring a first user sight angle corresponding to eyeballs of a user in a driving state;
detecting whether the first user gaze angle is within the user viewable area;
if so, determining that the sight of the user is aligned to the vehicle-mounted display screen;
otherwise, the fact that the sight line of the user is not aligned to the vehicle-mounted display screen is determined.
Preferably, the step of determining the attention area corresponding to the first user sight angle on the vehicle-mounted display screen includes:
establishing a second coordinate system by taking one of the corner points of the vehicle-mounted display screen as an original point, taking the length direction of the vehicle-mounted display screen as an x axis and taking the width direction of the vehicle-mounted display screen as a y axis;
dividing the vehicle-mounted display screen into n columns along the x-axis direction and n rows along the y-axis direction to form n2A plurality of independent quadrilateral display areas;
respectively determining the coordinates of four corner points of each quadrilateral display area under the second coordinate system;
performing coordinate conversion, and determining the user sight angles of four corner points of each quadrilateral display area in the first coordinate system; user sight angles corresponding to four corner points of one quadrilateral display area are defined to form a user sight angle range;
and determining one of the user sight angle ranges corresponding to the first user sight angles, and determining one corresponding display area as the attention area.
Preferably, the step of adjusting the brightness of the region of interest according to the ambient light brightness includes:
determining target brightness from a preset corresponding relation table of the ambient light brightness and the brightness of the attention area;
controlling the brightness of the attention area to be gradually adjusted to the target brightness within a preset time;
in the predetermined corresponding relation table, the brightness of the attention area increases with the increase of the ambient light brightness, and the brightness of different attention areas corresponding to the same ambient light brightness is different.
The embodiment of the invention also provides a system for adjusting the brightness of the vehicle-mounted display screen, which comprises the following steps:
the system comprises a camera for collecting the sight of a user, an ambient light collector for collecting ambient light brightness, and an infrared light supplement lamp for performing face infrared light supplement;
the vehicle-mounted control host is connected with the camera, the ambient light collector and the infrared light supplement lamp;
with the luminous display screen of on-vehicle control host computer connection, on-vehicle control host computer is used for:
detecting whether a first user sight angle under a driving state condition is aligned to a vehicle-mounted display screen;
when the alignment is carried out, determining a corresponding attention area of a first user sight angle on the vehicle-mounted display screen;
acquiring the ambient light brightness of the current environment of the vehicle;
and controlling the light-emitting display screen to adjust the brightness of the attention area according to the ambient light brightness.
The embodiment of the invention also provides a device for adjusting the brightness of the vehicle-mounted display screen, which comprises:
the detection module is used for detecting whether the first user sight angle is aligned to the vehicle-mounted display screen under the driving state condition, and the detection steps are as described above;
the determining module is used for determining a focus area corresponding to the first user sight angle on the vehicle-mounted display screen during alignment, and the determining step is as described above;
the obtaining module is used for obtaining the environmental light brightness of the current environment of the vehicle;
and the adjusting module is used for adjusting the brightness of the attention area according to the ambient light brightness, and the adjusting step is as described above.
The embodiment of the invention also provides an automobile which comprises the device for adjusting the brightness of the vehicle-mounted display screen.
The embodiment of the invention also provides a controller, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor reads the program in the memory and executes the steps in the method for adjusting the brightness of the vehicle-mounted display screen.
The invention has the beneficial effects that:
(1) because dynamic partition display is realized according to the eyeball watching position of the driver, the interference of screen information on the driver is reduced, and the driving safety is improved;
(2) the display information and the brightness of the non-driver attention area are controlled, the light pollution of a display screen is reduced, and the driving comfort is improved;
(3) the partitioned display of the vehicle-mounted display screen is realized, and the power consumption of the screen is reduced.
In conclusion, the large-size display screen dynamically adjusts the display area and the brightness of the large-size display screen along with the eye observation area of the driver, improves the driving safety, is comfortable and reduces the power consumption of the display screen.
Drawings
FIG. 1 is a schematic diagram of a user's eye viewing a display screen in accordance with the present invention;
FIG. 2 is a schematic diagram of a system structure in which the light-emitting display screen is an active light-emitting display screen according to the present embodiment;
FIG. 3 is a schematic diagram of a system in which the light-emitting display panel is an active light-emitting display panel according to the present embodiment;
FIG. 4 is a schematic diagram of a system structure in which the light-emitting display screen is a passive light-emitting display screen according to the present embodiment;
FIG. 5 is a schematic diagram of a system in which the light-emitting display is a passive light-emitting display according to the present embodiment;
fig. 6 is a flowchart illustrating the method in this embodiment.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The vehicle-mounted display screen is improved in a constant brightness display mode in the prior art, the vehicle-mounted display screen can adjust the brightness of an area concerned by a user (preferentially a driver in the embodiment, and certainly other passengers) on the vehicle-mounted display screen according to the ambient light brightness in certain specific scenes (such as the scenes at night or entering a tunnel), and the area not concerned by the user can be displayed by keeping a black screen or with lower brightness, so that the user use experience is improved, and the effect of reducing the power consumption of the vehicle-mounted display screen is achieved.
Referring to fig. 1, an embodiment of the present invention provides a method for adjusting brightness of a vehicle-mounted display screen, where the method is applied to a vehicle-mounted control host, and a vehicle in this embodiment is additionally provided with a "dynamic partition display function" of brightness of the vehicle-mounted display screen, where the "dynamic partition display function" includes an on state or an off state, and the "dynamic partition display function" may be actively started by a user, or may be automatically started by the vehicle-mounted control host when it is determined that a current environmental parameter meets a start setting requirement (e.g., when the environmental light brightness is lower than a set threshold). The automatic closing of the dynamic partition display function can be performed by manually inputting an instruction by a user, or can be performed automatically when the vehicle-mounted control host judges that the current environmental parameters meet the closing setting requirement (for example, the environmental light brightness is higher than the set threshold). Specifically, the method in this example includes:
step S1, when the brightness of the current environment of the vehicle is lower than a preset threshold, a first mode is started, the first mode is used for indicating that the brightness of the vehicle-mounted display screen is dynamically adjusted under the condition of specific environment brightness, and the first mode is a mode that the vehicle-mounted control host is automatically started according to the environment parameters; or receiving an instruction input by a user, and starting a second mode, where the second mode is used for instructing to dynamically adjust the brightness of the vehicle-mounted display screen under any ambient light brightness condition, and the second mode is the above-mentioned manual starting mode by the user.
The method comprises the steps that the brightness of the current environment light of a vehicle is detected through an environment light collector (such as an environment light sensor), the environment light collector periodically collects the brightness of the current environment light and feeds the collected brightness of the current environment light back to a vehicle-mounted control host, the vehicle-mounted control host receives the brightness of the collected environment light of the current environment light to judge whether the brightness of the current environment light of the vehicle is lower than a preset threshold value or not, and a first mode is started when the brightness of the current environment light is lower than the preset threshold value.
And step S2, establishing a first coordinate system by taking the eyeball of the user as an origin, taking the transverse direction perpendicular to the vehicle-mounted display screen as an x axis and taking the longitudinal direction as a y axis.
Step S3, guiding the user to observe each corner point of the vehicle-mounted display screen, and collecting second user sight angles corresponding to different corner points, wherein the second user sight angles comprise: the angle of the user's gaze relative to the x-axis and the angle of the user's gaze relative to the y-axis.
For example, for a rectangular vehicle-mounted display screen, 4 corner points of the vehicle-mounted display screen need to be observed, and after the camera finishes the acquisition of the second user sight line at one corner point, a prompt prompting that the user rotates eyeballs to observe the next corner point is displayed on the vehicle-mounted display screen until the acquisition of the user sight lines at each corner point is finished. With reference to fig. 1, when the second user gaze acquisition of 4 angular landing points is completed, the angles of the user gaze in the first coordinate system at the 4 angular landing points can be obtained, which are (θ x1, θ y 1), (θ x2, θ y 2), (θ x3, θ y3), (θ x4, and θ y 4); wherein θ x1 represents the angle of the user's gaze relative to the x-axis when the user's eye rotates to corner point 1, and θ y1 represents the angle of the user's gaze relative to the y-axis when the user's eye rotates to corner point 1; θ x2, θ x3, and θ x4 have similar meanings to θ x1, and θ y2, θ y3, and θ y4 have similar meanings to θ y 1.
Before guiding the user to observe corner points, the vehicle-mounted display screen prompts the user to adjust the position of the seat and adjust the sitting posture so as to simulate the sitting posture in the driving state.
Step S4, forming a user visible area according to the second user sight angle corresponding to each corner point; the user visible area represents the maximum visible range of the user eyeballs for the vehicle-mounted display screen under the condition of the simulated driving state.
With reference to fig. 1, after the second user gaze angle corresponding to each corner point is determined, the coordinates of each corner point in the first coordinate system are determined, and the corner points are connected to form the user visible region (in fig. 1, the user visible region is a rectangular region with a smaller area).
The above-described steps S1 to S4 need to be repeated every time the "dynamic partition display function" is turned on for the reason of the sitting posture of the driver or the replacement of the driver, to improve the accuracy of the determined user visible region.
After the dynamic partition display is started, in a driving state, as long as a user observes the behavior of the vehicle-mounted display screen, namely, an area concerned by the user on the vehicle-mounted display screen is found according to the observation behavior of the user, and then the brightness is adjusted.
And step S5, detecting whether the first user sight angle in the driving state is aligned with the vehicle-mounted display screen or not so as to eliminate the behavior that the user does not observe the vehicle-mounted display screen.
The vehicle is equipped with a camera, and the camera generates a picture of an inner chamber of the vehicle in the form of an image. The camera is specifically configured to process the detected image, that is, recognize a line of sight of the user on the acquired image information. Then, the camera is output to the vehicle-mounted control host in a signal mode.
In practical situations, due to insufficient ambient light brightness, the image collected by the camera may not clearly identify the sight line of the user. Therefore, when the camera performs image acquisition, an infrared light supplement lamp is needed to be used for light supplement, and the infrared light supplement lamp executes infrared light supplement operation by means of an instruction of the vehicle-mounted control host.
In a driving state, the camera continuously collects the inner chamber pictures, identifies whether the user eyeball images are collected or not, and reads out a first user sight angle (theta x, theta y) corresponding to the user eyeballs in the driving state when the user eyeball images are collected. Wherein the first user gaze angle comprises: an angle thetax of the first user line of sight relative to an x-axis in the first coordinate system and an angle thetay of the first user line of sight relative to a y-axis in the first coordinate system.
The vehicle-mounted control host can be an independent vehicle-mounted host, and can also be other integrated hosts, such as an instrument host and a central control entertainment host. The vehicle-mounted control host is connected with the camera by means of a communication interface, such as a wire or the like, and can receive signals sent by the camera, so that the sight of a user can be identified.
The vehicle-mounted control host judges whether the sight of the user is aligned to the vehicle-mounted display screen by detecting whether the first user sight angle is located in a predetermined user visible area, and if the sight of the user is located in the user visible area, the sight of the user is determined to be aligned to the vehicle-mounted display screen; otherwise, the fact that the sight line of the user is not aligned to the vehicle-mounted display screen is determined. Specifically, the user visible area is a maximum visible range of the eyeball of the user for the vehicle-mounted display screen under the condition of the simulated driving state, and the user visible area is an area formed by the vehicle-mounted control host guiding the user to observe each corner of the vehicle-mounted display screen in advance.
When the first user sight angle is determined not to be aligned to the vehicle-mounted display screen, the vehicle-mounted control host does not drive the active light-emitting display screen or the passive light-emitting display screen, and the active light-emitting display screen or the passive light-emitting display screen does not display any information.
And step S6, when the first user sight angle is determined to be aligned to the vehicle-mounted display screen, determining a focus area of the first user sight angle on the vehicle-mounted display screen. Since it has been determined in the foregoing step S5 that the first user gaze angle is aligned with the in-vehicle display screen, it is necessary to further determine which area of the in-vehicle display screen the user gaze focus is located in. The step S6 specifically includes:
establishing a second coordinate system by taking one of the corner points of the vehicle-mounted display screen as an original point, taking the length direction of the vehicle-mounted display screen as an x axis and taking the width direction of the vehicle-mounted display screen as a y axis;
dividing the vehicle-mounted display screen into n columns along the x-axis direction and n rows along the y-axis direction to form n2A plurality of independent quadrilateral display areas;
respectively determining the coordinates of four corner points of each quadrilateral display area under the second coordinate system;
performing coordinate conversion, and determining the user sight angles of four corner points of each quadrilateral display area in the first coordinate system; user sight angles corresponding to four corner points of one quadrilateral display area are defined to form a user sight angle range;
and determining one of the user sight angle ranges corresponding to the first user sight angles, and determining one corresponding display area as the attention area.
Referring to fig. 1, in this embodiment, the vehicle-mounted display screen has 4 corner points, and n is formed after the area division2A rectangular display area. The specific number of rectangular display areas is determined according to the technical capability of the product or the engineering requirements. In the x-axis direction along the second coordinate system, the coordinates of the first rectangular display area to the nth rectangular display area are respectively: a 1/nx、a*2/nx、a*3/nx……a*n/nx(ii) a Wherein a is the vehicle-mounted display screenA length in an x-axis direction of the second coordinate system; the coordinates of each rectangular display area are respectively: b 1/ny、b*2/ny、b*3/ny……b*n/ny(ii) a And b is the length of the vehicle-mounted display screen in the y-axis direction of the second coordinate system. Through coordinate conversion, it can be further obtained that, in the x-axis direction of the first coordinate system, the user sight angles corresponding to the first rectangular display area to the nth rectangular display area are respectively: [ (theta x 2-theta x1) + (theta x 4-theta x3)]*1/2 n、[(θx2-θx1)+ (θx4-θx3)]*2/2 n、[(θx2-θx1)+ (θx4-θx3)]*3/2 n、、、[(θx2-θx1)+ (θx4-θx3)]N/2 n; and in the y-axis direction of the first coordinate system, the user sight angles corresponding to the first rectangular display area to the nth rectangular display area are respectively as follows: [ (θ y1- θ y3) + (θ y2- θ y4)]*1/2 n、[(θy1-θy3)+ (θy2-θy4)]*2/2 n、[(θy1-θy3)+ (θy2-θy4)]*3/2 n、、、[(θy1-θy3)+ (θy2-θy4)]N/2 n. Further, it can be determined that n2And the rectangular display areas respectively correspond to the sight angles of the users.
Then, the first user sight angle is judged to be n2And determining the determined rectangular display area as the attention area.
In step S7, the ambient light brightness of the current environment of the vehicle is obtained. And detecting or acquiring the ambient light brightness through an ambient light brightness sensor.
After determining the area focused by the user, the brightness of the focused area needs to be adjusted, specifically, the method includes step S8: and adjusting the brightness of the attention area according to the ambient light brightness. Wherein, there is a predetermined correspondence table between the ambient light brightness and the brightness of the region of interest, in which the brightness of the region of interest at different ambient light brightness is recorded, and the brightness of the region of interest increases as the ambient light brightness increases. Aiming at different attention areas, the corresponding brightness is different under the same ambient light brightness. After the ambient light brightness is detected, reading a corresponding target brightness value in a preset corresponding relation table, and controlling the brightness of the attention area to be gradually adjusted to the target brightness within preset time.
As shown in fig. 5, the method of the present invention is implemented as follows:
102, establishing a first coordinate system by taking the eyeballs of the user as an origin, taking the transverse direction perpendicular to the vehicle-mounted display screen as an x axis and taking the longitudinal direction as a y axis;
103, guiding a user to observe each corner point of the vehicle-mounted display screen, and collecting corresponding second user sight angles at different corner points;
104, forming a user visible area according to the second user sight angle corresponding to each corner point;
106, when the first user sight angle is determined to be located in the user visible area, establishing a second coordinate system by taking one of the corner points of the vehicle-mounted display screen as an original point, the length direction of the vehicle-mounted display screen as an x axis and the width direction of the vehicle-mounted display screen as a y axis;
step 111, obtaining the ambient light brightness of the current environment of the vehicle;
and step 112, adjusting the brightness of the attention area according to the ambient light brightness.
According to the method, the brightness of the area concerned by the user in the vehicle-mounted display screen is adjusted according to the brightness of the environment, and the partition display of the brightness of the vehicle-mounted display screen is realized; on one hand, the power consumption can be reduced to the maximum extent; meanwhile, the brightness is adjusted according to the brightness of the environment, so that the sensitivity of the user to light in different environments can be well matched, and the driving and using experience of the user is improved.
The embodiment of the invention also provides a system for adjusting the brightness of the vehicle-mounted display screen, which comprises the following steps:
the device comprises a camera 2 for collecting the sight of a user, an ambient light collector 1 for collecting the ambient light brightness, and an infrared light supplement lamp 3 for performing infrared light supplement on a human face;
the vehicle-mounted control host 4 is connected with the camera 2, the ambient light collector 1 and the infrared light supplement lamp 3, and the vehicle-mounted control host 4 is used for:
detecting whether a sight angle of a first user is aligned to a vehicle-mounted display screen under the driving state condition;
when the alignment is carried out, determining a corresponding attention area of a first user sight angle on the vehicle-mounted display screen;
acquiring the ambient light brightness of the current environment of the vehicle;
and controlling the light-emitting display screen to adjust the brightness of the attention area according to the ambient light brightness.
The light emitting display screen has two modes of active light emitting and passive light emitting. For the active light emitting mode, the active light emitting display screen is connected with the vehicle-mounted control host, and the active light emitting display screen can be OLED, LED, QLED, Mini-LED, Micro-LED and the like. For the passive light emitting mode, the passive light emitting display screen is connected to the vehicle-mounted control host, the passive light emitting display screen includes a backlight unit (the backlight unit can realize dynamic partition driving) and an image display unit, and the passive light emitting display screen can be a display screen such as an LCD.
With reference to fig. 2 and fig. 3, in the present embodiment, for the system with an active light-emitting display screen, when in operation, the following process is performed:
1: the light sensor 1 sends the ambient light brightness information of the vehicle to the vehicle-mounted control host 4 through a hard wire, the vehicle-mounted control host 4 identifies the ambient light brightness information, and when the ambient light brightness is lower than a preset threshold value (namely, when the vehicle is identified to enter the environments such as night, tunnel and the like), the second mode is started to enter the dynamic partition display function (the mode can also be set according to the user requirement and is started all the time or is not started all the time).
2: after entering the dynamic partition display function, the infrared light supplement lamp 3 receives an opening instruction transmitted by the vehicle-mounted control host 4 through a hard wire, and executes the infrared light supplement work of the human face.
3: the camera 2 monitors the face state of the driver in real time, and sends acquired image information to the vehicle-mounted control host 4 through video signals after processing.
4: the vehicle-mounted control host 4 calculates the projection coordinates of the eye watching area of the driver by analyzing the state picture of the driver; comparing the projection coordinate of the eye watching area of the driver with the display area coordinate of the active light-emitting display screen 6, if the eye watching projection area coordinate of the driver does not fall in the screen display area (namely the determined user visible area) of the vehicle-mounted display screen, the vehicle-mounted control host does not drive the active light-emitting display screen 6, and the black screen of the active light-emitting display screen 6 does not display any information; if the coordinates of the eye-gazing projection area of the driver are in the screen display area (namely the determined user visible area), the vehicle-mounted control host 4 cuts the size of the display picture according to the eye-gazing projection area of the driver, compiles the display picture into a video signal and sends the video signal to the active luminous display screen 6.
5: and the vehicle-mounted control host 4 performs table lookup according to the ambient light brightness received from the light sensor 1 to obtain the target brightness value of the display screen.
6: the active light-emitting display screen 6 receives the display screen target brightness value and the image display area information sent by the vehicle-mounted control host 4, and executes brightness adjustment and display of the area, so that dynamic display of the attention area of the driver is realized.
With reference to fig. 4 and 5, in the present embodiment, for the system with the passive light-emitting display screen, when the system is in operation, the following process is performed:
1: the light sensor 1 sends the ambient light brightness information of the vehicle to the vehicle-mounted control host 4 through a hard wire, the vehicle-mounted control host 4 identifies the ambient light brightness information, and when the ambient light brightness is lower than a preset threshold value (namely, when the vehicle is identified to enter the environments such as night, tunnel and the like), the second mode is started to enter the dynamic partition display function (the mode can also be set according to the user requirement and is started all the time or is not started all the time).
2: after entering the dynamic partition display function, the infrared light supplement lamp 3 receives an opening instruction transmitted by the vehicle-mounted control host 4 through a hard wire, and executes the infrared light supplement work of the human face.
3: the camera 2 monitors the face state of the driver in real time, and sends acquired image information to the vehicle-mounted control host 4 through video signals after processing.
4: the vehicle-mounted control host 4 calculates the projection coordinates of the eye watching area of the driver by analyzing the state picture of the driver; comparing the projection coordinate of the eye watching area of the driver with the display area coordinate of the passive light-emitting display screen 5, if the eye watching projection area coordinate of the driver does not fall in the screen display area (namely the determined user visible area) of the vehicle-mounted display screen, the vehicle-mounted control host does not drive the passive light-emitting display screen 5, and the black screen of the passive light-emitting display screen 5 does not display any information; if the coordinates of the eye-gaze projection area of the driver are within the screen display area (i.e., the user visible area determined above), the vehicle-mounted control host 4 cuts the display screen size according to the eye-gaze projection area of the driver, and compiles the display screen size into a video signal to be sent to the image display unit 52 of the passive light-emitting display screen 5, and meanwhile, the vehicle-mounted control host 4 sends a backlight driving signal of the display position to the backlight unit 51 of the passive light-emitting display screen 5.
5: and the vehicle-mounted control host 4 performs table lookup according to the ambient light brightness received from the light sensor 1 to obtain the target brightness value of the display screen.
6: the passive light-emitting display screen 5 receives the target brightness value of the display screen and the image display area information sent by the vehicle-mounted control host 4, and executes brightness adjustment and display of the area, so that dynamic display of the attention area of the driver is realized.
The invention also provides a device for adjusting the brightness of the vehicle-mounted display screen, which comprises:
the detection module is used for detecting whether the first user sight angle under the driving state condition is aligned to the vehicle-mounted display screen or not, and the detection step is as described in the step 5;
a determining module, configured to determine, during alignment, a region of interest corresponding to a first user gaze angle on the vehicle-mounted display screen, where the determining step is as described in step 6;
the obtaining module is used for obtaining the environmental light brightness of the current environment of the vehicle;
and an adjusting module, configured to adjust the brightness of the attention area according to the ambient light brightness, where the adjusting step is as described in step 8.
The invention also provides an automobile comprising the method for adjusting the brightness of the vehicle-mounted display screen.
The invention also provides a controller, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, and is characterized in that the processor reads the program in the memory and executes the steps in the method for adjusting the brightness of the vehicle-mounted display screen.
The embodiments described above describe only some of the one or more embodiments of the present invention, but those skilled in the art will recognize that the invention can be embodied in many other forms without departing from the spirit or scope thereof. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and various modifications and substitutions may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (9)
1. A method for adjusting brightness of a vehicle-mounted display screen is characterized by comprising the following steps:
detecting whether a first user sight angle under a driving state condition is aligned to a vehicle-mounted display screen;
when the alignment is carried out, determining a corresponding attention area of a first user sight angle on the vehicle-mounted display screen;
acquiring the ambient light brightness of the current environment of the vehicle;
and adjusting the brightness of the attention area according to the ambient light brightness.
2. The method of claim 1, wherein prior to the step of detecting whether the first user gaze angle is aligned with the in-vehicle display screen, the method further comprises:
when the current ambient light brightness of the vehicle is lower than a preset threshold value, starting a first mode, wherein the first mode is used for indicating that the brightness of the vehicle-mounted display screen is dynamically adjusted under the condition of specific ambient light brightness; or receiving an instruction input by a user, and starting a second mode, wherein the second mode is used for indicating that the brightness of the vehicle-mounted display screen is dynamically adjusted under any ambient light brightness condition;
establishing a first coordinate system by taking the eyeballs of the user as an origin, taking the transverse direction perpendicular to the vehicle-mounted display screen as an x-axis and taking the longitudinal direction as a y-axis;
guiding a user to observe each corner point of the vehicle-mounted display screen, and collecting second user sight angles corresponding to different corner points, wherein the second user sight angles comprise: the angle of the user's gaze relative to the x-axis and the angle of the user's gaze relative to the y-axis;
forming a user visible area according to the second user sight angle corresponding to each corner point; the user visible area represents the maximum visible range of the user eyeballs for the vehicle-mounted display screen under the condition of the simulated driving state.
3. The method of claim 2, wherein detecting whether the first user gaze angle is aligned with the in-vehicle display screen comprises:
acquiring a first user sight angle corresponding to eyeballs of a user in a driving state;
detecting whether the first user gaze angle is within the user viewable area;
if so, determining that the first user sight angle is aligned to the vehicle-mounted display screen;
otherwise, it is determined that the first user gaze angle is not aligned with the in-vehicle display screen.
4. The method of claim 3, wherein determining the corresponding area of interest of the first user gaze angle on the in-vehicle display screen comprises:
establishing a second coordinate system by taking one of the corner points of the vehicle-mounted display screen as an original point, taking the length direction of the vehicle-mounted display screen as an x axis and taking the width direction of the vehicle-mounted display screen as a y axis;
dividing the vehicle-mounted display screen into n columns along the x-axis direction and n rows along the y-axis direction to form n2A plurality of independent quadrilateral display areas;
respectively determining the coordinates of four corner points of each quadrilateral display area under the second coordinate system;
performing coordinate conversion, and determining the user sight angles of four corner points of each quadrilateral display area in the first coordinate system; user sight angles corresponding to four corner points of one quadrilateral display area are defined to form a user sight angle range;
and determining one of the user sight angle ranges corresponding to the first user sight angles, and determining one corresponding display area as the attention area.
5. The method of claim 1, wherein adjusting the brightness of the region of interest based on the ambient light brightness comprises:
determining target brightness from a preset corresponding relation table of the ambient light brightness and the brightness of the attention area;
controlling the brightness of the attention area to be gradually adjusted to the target brightness within a preset time;
in the predetermined corresponding relation table, the brightness of the attention area increases with the increase of the ambient light brightness, and the brightness of different attention areas corresponding to the same ambient light brightness is different.
6. The utility model provides a system for vehicle-mounted display screen brightness control based on user's sight, its characterized in that includes:
the system comprises a camera for collecting the sight of a user, an ambient light collector for collecting ambient light brightness, and an infrared light supplement lamp for performing face infrared light supplement;
the vehicle-mounted control host is connected with the camera, the ambient light collector and the infrared light supplement lamp;
with the luminous display screen of on-vehicle control host computer connection, on-vehicle control host computer is used for:
detecting whether a first user sight angle under a driving state condition is aligned to a vehicle-mounted display screen;
when the alignment is carried out, determining a corresponding attention area of a first user sight angle on the vehicle-mounted display screen;
acquiring the ambient light brightness of the current environment of the vehicle;
and controlling the light-emitting display screen to adjust the brightness of the attention area according to the ambient light brightness.
7. The utility model provides a carry out on-vehicle display screen brightness control device based on user's sight, its characterized in that includes:
a detection module for detecting whether the first user's sight line angle is aligned with the vehicle-mounted display screen under the driving state condition, the detection step being as claimed in claim 3;
a determination module, configured to determine, when the first user gaze angle is aligned, a corresponding attention area on the in-vehicle display screen, the determination step being as claimed in claim 4;
the obtaining module is used for obtaining the environmental light brightness of the current environment of the vehicle;
an adjusting module, configured to adjust the brightness of the attention area according to the brightness of the ambient light, wherein the adjusting step is as claimed in claim 5.
8. An automobile, characterized by comprising the device for adjusting brightness of a display screen on board based on the line of sight of a user according to claim 7.
9. A controller comprising a memory, a processor and a computer program stored on the memory and operable on the processor, wherein the processor reads the program in the memory and executes the steps of the method for adjusting brightness of a vehicle display screen based on the line of sight of a user according to any one of claims 1 to 5.
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