CN113689829A - Automatic backlight adjusting method and automatic backlight adjusting system - Google Patents
Automatic backlight adjusting method and automatic backlight adjusting system Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
The invention discloses an automatic backlight adjusting method and an automatic backlight adjusting system, wherein the method comprises the steps of collecting the illumination intensity value of ambient light; determining a target backlight brightness value corresponding to the illumination intensity value and the backlight adjustment grade from a preset backlight adjustment table according to the illumination intensity value and the selected backlight adjustment grade; and adjusting the current backlight brightness value to the target backlight brightness value. According to the automatic backlight adjusting method and the automatic backlight adjusting system, the backlight brightness of the streaming media rearview mirror is automatically adjusted according to the illumination intensity value of the ambient light and the selected backlight adjusting level, so that the viewing effect of the streaming media rearview mirror is not easily influenced by the change of the external ambient brightness, the viewing comfort of a driver can be improved, and the driving safety can be improved.
Description
Technical Field
The invention relates to the technical field of backlight adjustment of rearview mirrors, in particular to an automatic backlight adjustment method and an automatic backlight adjustment system.
Background
The rear view mirror is one of the essential parts of the automobile. The rear view mirrors can be classified into two types according to the installation position, the rear view mirrors positioned on the left and right sides of the head of the automobile are outer rear view mirrors, and the rear view mirrors positioned on the inner side of the windshield of the automobile are inner rear view mirrors. When a driver sits on a cab seat, the conditions of the road surface at the rear and the left and right sides of the automobile can be directly acquired through the rearview mirror, and the visual field range of the driver is expanded.
At present, with the development of electronic technology, the traditional inside rear-view mirror in the vehicle tends to be replaced by the streaming media rear-view mirror. The streaming media rearview mirror, also called an electronic rearview mirror, is a rearview mirror that uses a display screen to replace the previous automobile reflector, and takes a real-time image of the road condition behind the vehicle through a camera, and then displays the image on the display screen. For the driver, because the brightness of the surrounding environment of the automobile changes constantly during the driving process, and the existing stream media rearview mirror does not have the automatic backlight adjusting function, when the automobile drives into places with weak ambient light ratio, such as an underground parking lot, a tunnel, a shady path and the like from the bottom of the sunlight with strong ambient light ratio, the driver can feel dazzling due to the excessively bright screen of the stream media rearview mirror, or when the automobile drives out from places with weak ambient light ratio, such as the underground parking lot, the tunnel, the shady path and the like and reenters into the bottom of the sunlight with strong ambient light ratio, the driver can feel unclear display pictures due to the excessively dark screen of the stream media rearview mirror, and the driving safety hazard is increased.
Therefore, there is a need for an improved streaming rearview mirror.
The above information is given as background information only to aid in understanding the present disclosure, and no determination or admission is made as to whether any of the above is available as prior art against the present disclosure.
Disclosure of Invention
The invention provides an automatic backlight adjusting method and an automatic backlight adjusting system, which aim to overcome the defects of the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in a first aspect, an embodiment of the present invention provides an automatic backlight adjusting method, where the method includes:
collecting the illumination intensity value of ambient light;
determining a target backlight brightness value corresponding to the illumination intensity value and the backlight adjustment grade from a preset backlight adjustment table according to the illumination intensity value and the selected backlight adjustment grade;
and adjusting the current backlight brightness value to the target backlight brightness value.
Further, in the automatic backlight adjusting method, before the step of acquiring the illumination intensity value of the ambient light, the method further includes:
receiving an input operation instruction;
and selecting a backlight adjusting level of the streaming media rearview mirror in response to the operation instruction.
Further, in the automatic backlight adjusting method, before the step of receiving the input operation instruction, the method further includes:
and pre-establishing a corresponding relation among the illumination intensity value, the backlight adjusting level and the target backlight brightness value to form a backlight adjusting table.
Further, in the automatic backlight adjusting method, the step of collecting the illumination intensity value of the ambient light includes:
collecting illumination intensity values in front and back directions;
and taking the larger one of the two illumination intensity values as the current illumination intensity value.
Further, in the automatic backlight adjusting method, after the step of acquiring the illumination intensity value of the ambient light, the method further includes:
calculating the difference value between the illumination intensity value and the illumination intensity value collected at the previous time;
judging whether the absolute value of the difference value is within a preset range or not;
if so, not adjusting the current backlight brightness value;
and if not, adjusting the current backlight brightness value.
Further, in the automatic backlight adjusting method, the adjusting the current backlight brightness value to the target backlight brightness value includes:
and performing step adjustment on the current backlight brightness value according to a preset step value until the target backlight brightness value is adjusted.
In a second aspect, an embodiment of the present invention provides an automatic backlight adjusting system, including:
the light intensity acquisition module is used for acquiring the illumination intensity value of the ambient light;
the backlight determining module is used for determining a target backlight brightness value corresponding to the illumination intensity value and the backlight adjusting grade from a preset backlight adjusting table according to the illumination intensity value and the selected backlight adjusting grade;
and the backlight adjusting module is used for adjusting the current backlight brightness value to the target backlight brightness value.
Further, in the automatic backlight adjusting system, the system further includes a level selecting module, configured to:
before the step of collecting the illumination intensity value of the ambient light, receiving an input operation instruction;
and selecting a backlight adjusting level of the streaming media rearview mirror in response to the operation instruction.
Further, in the automatic backlight adjusting system, the system further includes a relationship connection module, configured to:
before the step of receiving the input operation instruction, the corresponding relation among the illumination intensity value, the backlight adjusting level and the target backlight brightness value is established in advance to form a backlight adjusting table.
Further, in the automatic backlight adjusting system, the light intensity collecting module is specifically configured to:
collecting illumination intensity values in front and back directions;
and taking the larger one of the two illumination intensity values as the current illumination intensity value.
Further, in the automatic backlight adjusting system, the system further includes an adjustment judging module, configured to:
calculating a difference between the illumination intensity value and a previously collected illumination intensity value after the step of collecting the illumination intensity value of the ambient light;
judging whether the absolute value of the difference value is within a preset range or not;
if so, not adjusting the current backlight brightness value;
and if not, adjusting the current backlight brightness value.
Further, in the automatic backlight adjusting system, the backlight adjusting module is specifically configured to:
and performing step adjustment on the current backlight brightness value according to a preset step value until the target backlight brightness value is adjusted.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
according to the automatic backlight adjusting method and the automatic backlight adjusting system provided by the embodiment of the invention, the backlight brightness of the streaming media rearview mirror is automatically adjusted according to the illumination intensity value of the ambient light and the selected backlight adjusting level, so that the viewing effect of the streaming media rearview mirror is not easily influenced by the change of the external ambient brightness, the viewing comfort of a driver can be improved, and the driving safety can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic flow chart of an automatic backlight adjusting method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of an automatic backlight adjusting method according to a second embodiment of the present invention;
FIG. 3 is a diagram of a backlight adjustment table according to a second embodiment of the present invention;
fig. 4 is a schematic flowchart of an automatic backlight adjusting method according to a third embodiment of the present invention;
fig. 5 is a schematic flowchart of an automatic backlight adjusting method according to a fourth embodiment of the present invention;
fig. 6 is a functional block diagram of an automatic backlight adjusting system according to a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the referred devices or elements must have the specific orientations, be configured to operate in the specific orientations, and thus are not to be construed as limitations of the present invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
In view of the defects of the prior art, the inventor of the invention actively researches and innovates based on abundant practical experience and professional knowledge in many years of automobile industry and by matching with the application of theory, so as to create a feasible backlight adjusting technology, thereby ensuring that the technology has higher practicability. After continuous research, design and repeated trial and improvement, the invention with practical value is finally created.
Referring to fig. 1, fig. 1 is a schematic flow chart of an automatic backlight adjustment method, which is applicable to a scene in which a stream media rearview mirror is backlight-adjusted, and is implemented by an automatic backlight adjustment system, which can be implemented by software and/or hardware and is integrated inside the stream media rearview mirror. As shown in fig. 1, the automatic backlight adjusting method may include the steps of:
s101, collecting the illumination intensity value of the ambient light.
It should be noted that, in general, a light-sensitive element is installed in an automobile, and the light-sensitive element is used to collect the illumination intensity value of the ambient light. The acquisition process may be always performed, or may be performed according to a preset acquisition frequency, for example, once every 800 ms.
Preferably, in this embodiment, the step S101 may further include the following steps:
collecting illumination intensity values in front and back directions;
and taking the larger one of the two illumination intensity values as the current illumination intensity value.
It should be noted that, actually, there are two photosensitive elements on the streaming media rearview mirror, and the two photosensitive elements are respectively disposed at front and rear positions of the streaming media rearview mirror, and also because of different installation positions, the illumination intensity values of the ambient light respectively collected by the two photosensitive elements have differences, so the embodiment is designed to allow the streaming media rearview mirror to read and compare the illumination intensity values of the ambient light respectively collected by the front and rear two photosensitive elements, and then the one with the larger value is taken as the current illumination intensity value.
S102, determining a target backlight brightness value corresponding to the illumination intensity value and the backlight adjusting grade from a preset backlight adjusting table according to the illumination intensity value and the selected backlight adjusting grade.
It should be noted that the preset backlight adjustment table is set by the technician through experience, and the experience is obtained based on specific experimental results.
In this embodiment, the determined target backlight brightness value not only corresponds to the collected illumination intensity value, but also corresponds to the selected backlight adjustment level. The backlight adjustment level may be selectable by a user, for example, the backlight adjustment level may be divided into five levels, where the backlight adjustment of the first level is relatively darkest in all backlight adjustment levels, and the backlight adjustment of the fifth level is relatively brightest in all backlight adjustment levels. Specifically, under different backlight adjustment levels, even though the same illumination intensity value is acquired, the corresponding target backlight brightness values determined finally are different due to different backlight adjustment levels. In short, different backlight adjustment levels are in a sequentially increasing or decreasing situation.
The purpose of designing the backlight adjustment level in the embodiment is to provide more backlight adjustment schemes for the driver to select, so that the driver is expected to find a backlight adjustment level which is most suitable for the driver to observe, and personalized customization is realized.
S103, adjusting the current backlight brightness value to the target backlight brightness value.
It should be noted that, in the present embodiment, the backlight (display screen brightness) of the screen is controlled by the MCU through outputting a PWM (pulse width modulation) waveform. Namely, the backlight brightness is adjusted by changing the duty ratio of the PWM. The screen backlight PWM duty cycle ranges from 0% (off screen) to 100% (maximum brightness).
According to the automatic backlight adjusting method provided by the embodiment of the invention, the backlight brightness of the streaming media rearview mirror is automatically adjusted according to the illumination intensity value of the ambient light and the selected backlight adjusting level, so that the viewing effect of the streaming media rearview mirror is not easily influenced by the brightness change of the external environment, the viewing comfort of a driver can be improved, and the driving safety can be improved.
Example two
Referring to fig. 2, fig. 2 is a schematic flow chart illustrating an automatic backlight adjusting method according to an embodiment of the invention. On the basis of the technical solution provided by the first embodiment, before the step S101 of "acquiring the illumination intensity value of the ambient light", the method is further optimized. The explanation of the same or corresponding terms as those in the above embodiments is not repeated herein, and specifically, the method provided in this embodiment may further include the following steps:
receiving an input operation instruction;
and selecting a backlight adjusting level of the streaming media rearview mirror in response to the operation instruction.
Based on the above optimization, as shown in fig. 2, the automatic backlight adjusting method provided in this embodiment may specifically include the following steps:
s201, receiving an input operation instruction.
It should be noted that the input mode of the received operation instruction includes, but is not limited to, key input, touch input, APP input, and voice input.
Preferably, in this embodiment, before the step S201, the method further includes:
and pre-establishing a corresponding relation among the illumination intensity value, the backlight adjusting level and the target backlight brightness value to form a backlight adjusting table.
It should be noted that, the light intensity value, the backlight adjustment level and the target backlight brightness value in the backlight adjustment table are set by a technician through experience, and the setting provides a modifiable mechanism, that is, the driver can perform personalized modification in the later specific use process. Specifically, the backlight adjustment table may refer to fig. 3, where the ambient brightness in fig. 3 is an illumination intensity value of the ambient light collected in the embodiment, the first level to the fifth level in fig. 3 are backlight adjustment levels in the embodiment, and a numerical value of each level in fig. 3 is a target backlight brightness value in the embodiment.
S202, selecting the backlight adjusting level of the streaming media rearview mirror in response to the operation instruction.
It should be noted that, the driver can select backlight adjustment levels with different levels as needed at any time, and after the selection, the backlight adjustment of the streaming media rearview mirror according to the embodiment is performed according to the latest selected backlight adjustment level.
And S203, collecting the illumination intensity value of the ambient light.
S204, determining a target backlight brightness value corresponding to the illumination intensity value and the backlight adjusting level from a preset backlight adjusting table according to the illumination intensity value and the selected backlight adjusting level.
S205, adjusting the current backlight brightness value to the target backlight brightness value.
According to the automatic backlight adjusting method provided by the embodiment of the invention, the backlight brightness of the streaming media rearview mirror is automatically adjusted according to the illumination intensity value of the ambient light and the selected backlight adjusting level, so that the viewing effect of the streaming media rearview mirror is not easily influenced by the brightness change of the external environment, the viewing comfort of a driver can be improved, and the driving safety can be improved.
EXAMPLE III
Referring to fig. 4, fig. 4 is a schematic flow chart illustrating an automatic backlight adjusting method according to an embodiment of the invention. On the basis of the technical solution provided by the first embodiment, after "acquiring the illumination intensity value of the ambient light" in step S101, the method is further optimized. The explanation of the same or corresponding terms as those in the above embodiments is not repeated herein, and specifically, the method provided in this embodiment may further include the following steps:
calculating the difference value between the illumination intensity value and the illumination intensity value collected at the previous time;
judging whether the absolute value of the difference value is within a preset range or not;
if so, not adjusting the current backlight brightness value;
and if not, adjusting the current backlight brightness value.
Based on the above optimization, as shown in fig. 4, the automatic backlight adjusting method provided in this embodiment may specifically include the following steps:
s301, collecting the illumination intensity value of the ambient light.
S302, calculating a difference value between the illumination intensity value and the illumination intensity value collected at the previous time.
S303, judging whether the absolute value of the difference value is within a preset range; if yes, step S304 is executed, and if no, step S305 is executed.
The preset range is set by the skilled person through experience, which is obtained based on specific experimental results, and may be any value.
And S304, not adjusting the current backlight brightness value.
S305, adjusting the current backlight brightness value.
It should be noted that, in order to prevent the flickering phenomenon that may result from a sudden and dim screen due to frequent backlight brightness adjustment, the embodiment performs hysteresis processing after collecting the illumination intensity value of the ambient light. Specifically, whether the absolute value of the difference value between the illumination intensity value collected this time and the illumination intensity value collected last time is within the preset range or not is compared, so that whether the illumination intensity value collected this time needs to be adjusted or not is judged, the number of times of backlight brightness adjustment is reduced, backlight brightness can be stably output, and visual perception is improved.
S306, according to the illumination intensity value and the selected backlight adjusting level, determining a target backlight brightness value corresponding to the illumination intensity value and the backlight adjusting level from a preset backlight adjusting table.
S307, adjusting the current backlight brightness value to the target backlight brightness value.
According to the automatic backlight adjusting method provided by the embodiment of the invention, the backlight brightness of the streaming media rearview mirror is automatically adjusted according to the illumination intensity value of the ambient light and the selected backlight adjusting level, so that the viewing effect of the streaming media rearview mirror is not easily influenced by the brightness change of the external environment, the viewing comfort of a driver can be improved, and the driving safety can be improved.
Example four
Referring to fig. 5, fig. 5 is a schematic flow chart illustrating an automatic backlight adjusting method according to an embodiment of the invention. In this embodiment, based on the technical solution provided in the first embodiment, the step S103 of adjusting the current backlight brightness value to the target backlight brightness value is further optimized. The same or corresponding explanations of terms as those in the above embodiments are omitted here, namely:
and performing step adjustment on the current backlight brightness value according to a preset step value until the target backlight brightness value is adjusted.
Based on the above optimization, as shown in fig. 5, the automatic backlight adjusting method provided in this embodiment may specifically include the following steps:
s401, collecting the illumination intensity value of the ambient light.
S402, determining a target backlight brightness value corresponding to the illumination intensity value and the backlight adjusting grade from a preset backlight adjusting table according to the illumination intensity value and the selected backlight adjusting grade.
And S403, performing stepping adjustment on the current backlight brightness value according to a preset stepping value until the target backlight brightness value is adjusted.
The step value refers to the amplitude at each backlight adjustment. The preset step value is set by a technician through experience, which is obtained based on specific experimental results and can be any value.
In order to make the backlight brightness change of the screen smooth and not generate sudden flicker, the backlight brightness adjustment in this embodiment adopts a step adjustment method, specifically, when the brightness of the ambient light changes and the screen backlight brightness of the streaming media rearview mirror needs to change, the PWM adjustment of the screen backlight is not directly switched from the current backlight brightness to the target backlight brightness value, but adopts a step adjustment method, for example, the PWM is changed from 50 to 30, and the adjustment process is as follows: 50 → 49 → 48 → … … → 32 → 31 → 30, the step value is 1. With software settings, the time to adjust 1 PWM at a time can be 5 ms.
According to the automatic backlight adjusting method provided by the embodiment of the invention, the backlight brightness of the streaming media rearview mirror is automatically adjusted according to the illumination intensity value of the ambient light and the selected backlight adjusting level, so that the viewing effect of the streaming media rearview mirror is not easily influenced by the brightness change of the external environment, the viewing comfort of a driver can be improved, and the driving safety can be improved.
EXAMPLE five
Fig. 6 is a schematic diagram of a functional module of an automatic backlight adjusting system according to a fifth embodiment of the present invention, where the system is adapted to execute the automatic backlight adjusting method according to the fifth embodiment of the present invention. The system specifically comprises the following modules:
a light intensity collecting module 501 for collecting the illumination intensity value of the ambient light;
a backlight determining module 502, configured to determine, according to the illumination intensity value and the selected backlight adjustment level, a target backlight brightness value corresponding to the illumination intensity value and the backlight adjustment level from a preset backlight adjustment table;
the backlight adjusting module 503 is configured to adjust the current backlight brightness value to the target backlight brightness value.
Preferably, the system further comprises a rank selection module for:
before the step of collecting the illumination intensity value of the ambient light, receiving an input operation instruction;
and selecting a backlight adjusting level of the streaming media rearview mirror in response to the operation instruction.
Preferably, the system further comprises a relationship connection module, configured to:
before the step of receiving the input operation instruction, the corresponding relation among the illumination intensity value, the backlight adjusting level and the target backlight brightness value is established in advance to form a backlight adjusting table.
Preferably, the light intensity collecting module 501 is specifically configured to:
collecting illumination intensity values in front and back directions;
and taking the larger one of the two illumination intensity values as the current illumination intensity value.
Preferably, the system further comprises an adjustment judging module, configured to:
calculating a difference between the illumination intensity value and a previously collected illumination intensity value after the step of collecting the illumination intensity value of the ambient light;
judging whether the absolute value of the difference value is within a preset range or not;
if so, not adjusting the current backlight brightness value;
and if not, adjusting the current backlight brightness value.
Preferably, the backlight adjusting module 503 is specifically configured to:
and performing step adjustment on the current backlight brightness value according to a preset step value until the target backlight brightness value is adjusted.
According to the automatic backlight adjusting system provided by the embodiment of the invention, the backlight brightness of the streaming media rearview mirror is automatically adjusted according to the illumination intensity value of the ambient light and the selected backlight adjusting level, so that the viewing effect of the streaming media rearview mirror is not easily influenced by the brightness change of the external environment, the viewing comfort of a driver can be improved, and the driving safety can be improved.
The system can execute the method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
The foregoing description of the embodiments has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same elements or features may also vary in many respects. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
Example embodiments are provided so that this disclosure will be thorough and will fully convey the scope to those skilled in the art. Numerous details are set forth, such as examples of specific parts, devices, and methods, in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In certain example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and "comprising" are intended to be inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed and illustrated, unless explicitly indicated as an order of performance. It should also be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being "on" … … "," engaged with "… …", "connected to" or "coupled to" another element or layer, it can be directly on, engaged with, connected to or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element or layer is referred to as being "directly on … …," "directly engaged with … …," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship of elements should be interpreted in a similar manner (e.g., "between … …" and "directly between … …", "adjacent" and "directly adjacent", etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region or section from another element, component, region or section. Unless clearly indicated by the context, use of terms such as the terms "first," "second," and other numerical values herein does not imply a sequence or order. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
Spatially relative terms, such as "inner," "outer," "below," "… …," "lower," "above," "upper," and the like, may be used herein for ease of description to describe a relationship between one element or feature and one or more other elements or features as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below … …" can encompass both an orientation of facing upward and downward. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted.
Claims (12)
1. An automatic backlight adjustment method, the method comprising:
collecting the illumination intensity value of ambient light;
determining a target backlight brightness value corresponding to the illumination intensity value and the backlight adjustment grade from a preset backlight adjustment table according to the illumination intensity value and the selected backlight adjustment grade;
and adjusting the current backlight brightness value to the target backlight brightness value.
2. The automatic backlight adjustment method of claim 1, wherein prior to the step of collecting illumination intensity values of ambient light, the method further comprises:
receiving an input operation instruction;
and selecting a backlight adjusting level of the streaming media rearview mirror in response to the operation instruction.
3. The automatic backlight adjustment method of claim 2, wherein prior to the step of receiving the input operation instruction, the method further comprises:
and pre-establishing a corresponding relation among the illumination intensity value, the backlight adjusting level and the target backlight brightness value to form a backlight adjusting table.
4. The automatic backlight adjustment method of claim 1, wherein the step of collecting the illumination intensity value of the ambient light comprises:
collecting illumination intensity values in front and back directions;
and taking the larger one of the two illumination intensity values as the current illumination intensity value.
5. The automatic backlight adjustment method of claim 1, wherein after the step of collecting illumination intensity values of ambient light, the method further comprises:
calculating the difference value between the illumination intensity value and the illumination intensity value collected at the previous time;
judging whether the absolute value of the difference value is within a preset range or not;
if so, not adjusting the current backlight brightness value;
and if not, adjusting the current backlight brightness value.
6. The automatic backlight adjustment method of claim 1, wherein the step of adjusting the current backlight brightness value to the target backlight brightness value comprises:
and performing step adjustment on the current backlight brightness value according to a preset step value until the target backlight brightness value is adjusted.
7. An automatic backlight adjustment system, the system comprising:
the light intensity acquisition module is used for acquiring the illumination intensity value of the ambient light;
the backlight determining module is used for determining a target backlight brightness value corresponding to the illumination intensity value and the backlight adjusting grade from a preset backlight adjusting table according to the illumination intensity value and the selected backlight adjusting grade;
and the backlight adjusting module is used for adjusting the current backlight brightness value to the target backlight brightness value.
8. The automatic backlight adjustment system of claim 7, further comprising a rank selection module to:
before the step of collecting the illumination intensity value of the ambient light, receiving an input operation instruction;
and selecting a backlight adjusting level of the streaming media rearview mirror in response to the operation instruction.
9. The automatic backlight adjustment system of claim 8, further comprising a relational connection module to:
before the step of receiving the input operation instruction, the corresponding relation among the illumination intensity value, the backlight adjusting level and the target backlight brightness value is established in advance to form a backlight adjusting table.
10. The automatic backlight adjustment system of claim 7, wherein the light intensity collection module is specifically configured to:
collecting illumination intensity values in front and back directions;
and taking the larger one of the two illumination intensity values as the current illumination intensity value.
11. The automatic backlight adjustment system of claim 7, further comprising an adjustment determination module to:
calculating a difference between the illumination intensity value and a previously collected illumination intensity value after the step of collecting the illumination intensity value of the ambient light;
judging whether the absolute value of the difference value is within a preset range or not;
if so, not adjusting the current backlight brightness value;
and if not, adjusting the current backlight brightness value.
12. The automatic backlight adjustment system of claim 7, wherein the backlight adjustment module is specifically configured to:
and performing step adjustment on the current backlight brightness value according to a preset step value until the target backlight brightness value is adjusted.
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