阅读说明：本技术 背光源亮度调节方法、系统、装置以及显示设备 (Backlight brightness adjusting method, system and device and display equipment ) 是由 何磊 何羽熙 于 2021-07-17 设计创作，主要内容包括：本申请涉及背光源技术领域,尤其是涉及一种背光源亮度调节方法、系统、装置以及显示设备,其方法包括通过获取人体感测信号以及环境光亮度,利用人体感测信号以及环境光的亮度作为双重判断条件,使背光源的亮度不仅能够根据环境光的亮度生成调光指令来调节,也能根据人体感测信号与环境光的亮度生成调节指令对背光源的亮度进行微调,以使背光源的亮度适应于不同的使用者,提高使用者在使用显示器的舒适感,能够根据使用者对光的敏感度的实际情况的不同来调节背光源的亮度,以满足不同使用者对背光源亮度的实际需求。(The application relates to the technical field of backlight sources, in particular to a backlight source brightness adjusting method, a system, a device and display equipment, wherein the method comprises the steps of obtaining human body sensing signals and ambient light brightness, and utilizing the human body sensing signals and the ambient light brightness as double judgment conditions, so that the brightness of the backlight source can be adjusted by generating a dimming instruction according to the ambient light brightness, and also can be adjusted by generating an adjusting instruction according to the human body sensing signals and the ambient light brightness to finely adjust the brightness of the backlight source, so that the brightness of the backlight source is suitable for different users, the comfort of the users in using a display is improved, the brightness of the backlight source can be adjusted according to the difference of the actual conditions of the user to the light sensitivity, and the actual requirements of different users on the brightness of the backlight source are met.)

1. A backlight brightness adjusting method is characterized by comprising the following steps:

obtaining the brightness of the current environment light, and comparing the brightness of the current environment light with a preset basic brightness to obtain a comparison result;

acquiring the brightness of the backlight source, generating a dimming instruction according to the comparison result and setting standard adjustment brightness, wherein the dimming instruction comprises a first dimming instruction and a second dimming instruction, and the brightness of the backlight source is adjusted to the standard adjustment brightness according to the dimming instruction;

the method comprises the steps of obtaining a human body sensing signal, wherein the human body sensing signal comprises a first human body sensing signal and a second human body sensing signal, determining a brightness adjusting range according to the human body sensing signal and a dimming instruction, generating a corresponding adjusting instruction, wherein the adjusting instruction comprises a first adjusting instruction, a second adjusting instruction, a third adjusting instruction and a fourth adjusting instruction, the brightness adjusting range comprises a first brightness adjusting range and a second brightness adjusting range, and adjusting the brightness of a backlight source in the brightness adjusting range according to the corresponding adjusting instruction.

2. The method according to claim 1, wherein the step of obtaining the brightness of the backlight and generating the dimming command according to the comparison result comprises:

acquiring the brightness of the backlight source, and when the brightness of the ambient light is smaller than a preset basic brightness, generating a first dimming instruction to adjust the brightness by taking the preset basic brightness as a standard to adjust the brightness of the backlight source;

and acquiring the brightness of the backlight source, and generating a second dimming instruction to adjust the brightness of the backlight source by taking the brightness of the ambient light as a standard when the brightness of the ambient light is greater than a preset basic brightness.

3. The method according to claim 2, wherein the specific steps of obtaining the human body sensing signal, determining a brightness adjustment range according to the human body sensing signal and the dimming command, and generating the corresponding adjustment command include:

acquiring a first human body sensing signal;

when the first human body sensing signal is acquired and the first dimming instruction is received, generating a first adjusting instruction, determining a first brightness adjusting range, and reducing the brightness of the backlight source within the first brightness adjusting range according to the first adjusting instruction;

when the first human body sensing signal is acquired and the second dimming instruction is received, the second brightness adjusting range is determined and the second adjusting instruction is generated, and the brightness of the backlight source is reduced in the second brightness adjusting range according to the second adjusting instruction.

4. The method according to claim 3, wherein the specific steps of obtaining the human body sensing signal, determining a brightness adjustment range according to the human body sensing signal and the dimming command, and generating the corresponding adjustment command further comprise:

acquiring a second human body sensing signal;

when the second human body sensing signal is obtained and the first dimming instruction is received, determining a first brightness adjusting range according to the second human body sensing signal and the first dimming instruction and generating a third adjusting instruction, and improving the brightness of the backlight source within the first brightness adjusting range according to the third adjusting instruction;

when the second human body sensing signal is obtained and the first dimming instruction is received, a second brightness adjusting range is determined according to the second human body sensing signal and the second dimming instruction, a fourth adjusting instruction is generated, and the brightness of the backlight source is improved within the second brightness adjusting range according to the fourth adjusting instruction.

5. The method of claim 3, wherein the step of acquiring the first human body sensing signal comprises:

acquiring a human face image frame sequence acquired by a camera at regular time, and extracting an eye image from each human face image frame;

analyzing and identifying the eye image, generating eye image information, matching the eye image information with preset eye image information, and judging the type of the eye image, wherein the type of the eye image comprises an eye opening image type and an eye closing image type;

setting marks of each frame of face image according to the eye image type of each frame, and generating a face image mark sequence;

calculating the frequency of completing blinking actions of the user based on the face image marking sequence;

comparing the frequency of the blinking actions of the user with a preset frequency to obtain a comparison result and determining whether a first human body sensing signal is generated or not;

and if the frequency of completing the blinking actions is greater than the preset frequency, determining to generate a first human body sensing signal.

6. The method as claimed in claim 4, wherein the step of acquiring the second human body sensing signal comprises:

acquiring a face image, identifying the face image, and identifying key features on the face image;

calculating parameter values of key features of the human face;

comparing the parameter value of the key feature of the face with the preset parameter value of the corresponding key feature to obtain a comparison result;

determining whether to generate a second human sensing signal according to the comparison result;

and if the parameter value of the key feature of the human face is smaller than the preset parameter value of the corresponding key feature, determining to generate a second human body sensing signal.

7. A backlight brightness adjustment system, comprising:

the first acquisition module is used for acquiring the brightness of the current ambient light;

a second obtaining module: the backlight source is used for acquiring the brightness of the backlight source;

the human body sensing module: acquiring human body sensing signals, wherein the human body sensing signals comprise a first human body sensing signal and a second human body sensing signal;

a comparison module: comparing the brightness of the ambient light with a preset basic brightness to obtain a comparison result;

a judging module: generating a dimming instruction according to the comparison result, wherein the dimming instruction comprises a first dimming instruction and a second dimming instruction; the dimming control circuit is used for generating a corresponding adjusting instruction according to the human body sensing signal and the dimming instruction and determining a brightness adjusting range, wherein the brightness adjusting range comprises a first brightness adjusting range and a second brightness adjusting range, and the adjusting instruction comprises a first adjusting instruction, a second adjusting instruction, a third adjusting instruction and a fourth adjusting instruction;

an execution module: the corresponding dimming instruction is obtained to adjust the brightness of the backlight source; the adjusting device is used for acquiring the corresponding adjusting instruction to adjust the brightness of the backlight source in the brightness adjusting range.

8. A backlight luminance adjustment device, comprising:

the first brightness sensor is used for sensing the current ambient light brightness;

a second brightness sensor for sensing the brightness of the backlight source;

the camera is used for acquiring a face image;

the signal processor is used for identifying, analyzing and processing the data acquired by the first brightness sensor, the second brightness sensor and the camera;

the controller is used for receiving the brightness of the current ambient light sensed by the first brightness sensor, the brightness of the backlight source sensed by the second brightness sensor and the face image collected by the camera and controlling the brightness of the backlight source within a brightness adjusting range, the output end of the controller is electrically connected with the output end of the signal processor, and the output end of the controller is electrically connected with the backlight source.

9. A display apparatus comprising a display panel, a backlight source and the backlight source brightness adjusting device of claim 8, wherein the backlight source is disposed below the display panel, and the backlight source is electrically connected to the controller of the backlight source brightness adjusting device.

10. A readable storage medium, characterized in that a computer program capable of being loaded by a processor and executing the backlight brightness adjustment method according to any one of the claims 1-6 is stored.

Technical Field

The present disclosure relates to the field of backlight technologies, and in particular, to a method, a system, a device, and a display apparatus for adjusting brightness of a backlight.

Background

The liquid crystal display is an active matrix liquid crystal display driven by a thin film transistor, and comprises liquid crystal glass and a light source, wherein the light source is generally arranged on the back of the liquid crystal glass, and mainly forms a picture by stimulating liquid crystal molecules to generate points, lines and surfaces in cooperation with the back light source through current. The light source is a backlight source, and the light emitting effect of the light source directly affects the visual effect displayed on the liquid crystal display.

The light emitting effect of the backlight source is mainly determined according to the brightness of the backlight source, at present, the brightness of the backlight source is generally adjusted by manually touching the liquid crystal display, and the brightness of the backlight source needs to be manually adjusted according to different environments every time, so that the operation is inconvenient.

In order to solve the problem of manually adjusting the brightness of the backlight source of the display screen, in the related art, the brightness of the backlight source is controlled by sensing the brightness of the external environment, and the brightness of the backlight source at the moment is determined by a theoretical value relative to the brightness of the external environment, so that the brightness of the backlight source is suitable for people to watch images.

For the related art, the inventor thinks that the sensitivities of the eyes of each person to light are different, so that the sensitivities of the eyes of the people to light are different in different environments, and if the people watch images in front of the display screen, the brightness adjusting mode cannot automatically adjust the brightness of the backlight source according to the difference of the sensitivities of the people to light, and cannot meet the brightness requirements of different users.

Disclosure of Invention

In order to solve the problem that the brightness of the backlight source cannot be automatically adjusted according to the brightness requirement of a user, the application provides a backlight source brightness adjusting method, a system, a device and display equipment.

In a first aspect, the present application provides a method for adjusting brightness of a backlight source, which adopts the following technical scheme:

obtaining the brightness of the current environment light, and comparing the brightness of the current environment light with a preset basic brightness to obtain a comparison result;

acquiring the brightness of the backlight source, generating a dimming instruction according to the comparison result and setting standard adjustment brightness, wherein the dimming instruction comprises a first dimming instruction and a second dimming instruction, and the brightness of the backlight source is adjusted to the standard adjustment brightness according to the dimming instruction;

the method comprises the steps of obtaining a human body sensing signal, wherein the human body sensing signal comprises a first human body sensing signal and a second human body sensing signal, determining a brightness adjusting range according to the human body sensing signal and a dimming instruction, generating a corresponding adjusting instruction, wherein the adjusting instruction comprises a first adjusting instruction, a second adjusting instruction, a third adjusting instruction and a fourth adjusting instruction, the brightness adjusting range comprises a first brightness adjusting range and a second brightness adjusting range, and adjusting the brightness of a backlight source in the brightness adjusting range according to the corresponding adjusting instruction.

By adopting the technical scheme, the brightness of the current ambient light is firstly obtained, the contrast result is obtained by comparing the brightness of the ambient light with the preset basic brightness, the brightness of the backlight source is obtained, generating a dimming instruction according to the comparison result to control the brightness of the backlight source, and when a human body sensing signal is acquired, an adjustment command is generated according to the human body sensing signal and the dimming command and a brightness adjustment range is determined, the brightness of the backlight source is adjusted according to the corresponding adjusting instruction, so that the brightness of the backlight source can be automatically adjusted under the double effects of sensing the human body sensing signal and sensing the brightness of the ambient light, so that the brightness of the backlight source can be adjusted according to the actual situation of the sensitivity of the user to light, the backlight source brightness adjustment device meets the actual requirements of different users on the backlight source brightness, and improves the comfort of the users on the backlight source brightness.

Optionally, the specific steps of obtaining the brightness of the backlight source and generating the dimming instruction according to the comparison result include:

acquiring the brightness of the backlight source, and when the brightness of the ambient light is smaller than a preset basic brightness, generating a first dimming instruction to adjust the brightness by taking the preset basic brightness as a standard to adjust the brightness of the backlight source;

and acquiring the brightness of the backlight source, and generating a second dimming instruction to adjust the brightness of the backlight source by taking the brightness of the ambient light as a standard when the brightness of the ambient light is greater than a preset basic brightness.

By adopting the technical scheme, the brightness of the backlight source is obtained, if the brightness of the ambient light is smaller than the preset basic brightness, the first dimming instruction is generated and the brightness is adjusted by taking the preset basic brightness as the standard, if the brightness of the ambient light is larger than the preset basic brightness, the second dimming instruction is generated, and the brightness is adjusted by taking the brightness of the ambient light as the standard, so that the brightness of a screen of the display can be clearly seen when a user is in a darker environment, the basic brightness of the backlight source can be adjusted according to different ambient lights when the user is in a brighter environment, and the basic requirements of the user are met.

Optionally, the specific steps of obtaining the human body sensing signal, determining a brightness adjustment range according to the human body sensing signal and the dimming instruction, and generating a corresponding adjustment instruction include:

acquiring a first human body sensing signal;

when the first human body sensing signal is acquired and the first dimming instruction is received, generating a first adjusting instruction, determining a first brightness adjusting range, and reducing the brightness of the backlight source within the first brightness adjusting range according to the first adjusting instruction;

when the first human body sensing signal is acquired and the second dimming instruction is received, the second brightness adjusting range is determined and the second adjusting instruction is generated, and the brightness of the backlight source is reduced in the second brightness adjusting range according to the second adjusting instruction.

By adopting the technical scheme, the first human body sensing signal is acquired, the corresponding first adjusting instruction is generated according to the first human body sensing signal and the first dimming instruction, and the first brightness adjusting range is determined, so that the first human body sensing signal and the first dimming instruction are used for generating the first adjusting instruction, the subsequent brightness of the backlight source is finely adjusted and reduced, a user is not prone to feeling discomfort caused by brightness of the backlight source, and discomfort of the user when watching a screen is reduced.

Optionally, the specific steps of obtaining the human body sensing signal, determining a brightness adjustment range according to the human body sensing signal and the dimming instruction, and generating a corresponding adjustment instruction further include:

acquiring a second human body sensing signal;

when the second human body sensing signal is obtained and the first dimming instruction is received, determining a first brightness adjusting range according to the second human body sensing signal and the first dimming instruction and generating a third adjusting instruction, and improving the brightness of the backlight source within the first brightness adjusting range according to the third adjusting instruction;

when the second human body sensing signal is obtained and the first dimming instruction is received, a second brightness adjusting range is determined according to the second human body sensing signal and the second dimming instruction, a fourth adjusting instruction is generated, and the brightness of the backlight source is improved within the second brightness adjusting range according to the fourth adjusting instruction.

By adopting the technical scheme, when the second human body sensing signal is sensed, the sensing degree of the user to the light of the backlight source is determined according to the distance between the human face and the screen, the second human body sensing signal and the second dimming instruction are used for adjusting to generate the second adjusting instruction, and the second brightness dimming range is determined, so that the subsequent brightness of the backlight source can be finely adjusted.

Optionally, the specific step of acquiring the first human body sensing signal includes:

acquiring a human face image frame sequence acquired by a camera at regular time, and extracting an eye image from each human face image frame;

analyzing and identifying the eye image, generating eye image information, matching the eye image information with preset eye image information, and judging the type of the eye image, wherein the type of the eye image comprises an eye opening image type and an eye closing image type;

setting marks of each frame of face image according to the eye image type of each frame, and generating a face image mark sequence;

calculating the frequency of completing blinking actions of the user based on the face image marking sequence;

comparing the frequency of the blinking actions of the user with a preset frequency to obtain a comparison result and determining whether a first human body sensing signal is generated or not;

and if the frequency of completing the blinking actions is greater than the preset frequency, determining to generate a first human body sensing signal.

By adopting the technical scheme, the frequently blinking is used as a judgment condition of a human body sensing signal, the human face image frame sequence and the eye image in each human face image frame are obtained at regular time, then the human face image mark is set, the human face image mark sequence is set according to the human face image mark, the frequency of blinking actions of a user in a period is calculated, whether the eyes of the user blink frequently or not is determined, the backlight source brightness at the moment is judged to cause discomfort to the eyes of the user, and the backlight source brightness needs to be adjusted, so that a first human body sensing signal is generated.

Optionally, the specific step of acquiring the second human body sensing signal includes:

acquiring a face image, identifying the face image, and identifying key features on the face image;

calculating parameter values of key features of the human face;

comparing the parameter value of the key feature of the face with the preset parameter value of the corresponding key feature to obtain a comparison result;

determining whether to generate a second human sensing signal according to the comparison result;

and if the parameter value of the key feature of the human face is smaller than the preset parameter value of the corresponding key feature, determining to generate a second human body sensing signal.

By adopting the technical scheme, the human face image is obtained, the key features are identified from the human face image, the parameter values of the key features on the human face are calculated, the parameter values of the key features are compared with the preset parameter values corresponding to the key features, the distance between eyes and a screen is judged, the brightness of a backlight source is judged, and therefore a second human body sensing signal is determined to be generated.

In a second aspect, the backlight brightness adjusting system of the present application adopts the following technical scheme:

a backlight brightness adjustment system, comprising:

the first acquisition module is used for acquiring the brightness of the current ambient light;

a second obtaining module: the backlight source is used for acquiring the brightness of the backlight source;

the human body sensing module: acquiring human body sensing signals, wherein the human body sensing signals comprise a first human body sensing signal and a second human body sensing signal;

a comparison module: comparing the brightness of the ambient light with a preset basic brightness to obtain a comparison result;

a judging module: generating a dimming instruction according to the comparison result, wherein the dimming instruction comprises a first dimming instruction and a second dimming instruction; the dimming control circuit is used for generating a corresponding adjusting instruction according to the human body sensing signal and the dimming instruction and determining a brightness adjusting range, wherein the brightness adjusting range comprises a first brightness adjusting range and a second brightness adjusting range, and the adjusting instruction comprises a first adjusting instruction, a second adjusting instruction, a third adjusting instruction and a fourth adjusting instruction;

an execution module: the corresponding dimming instruction is obtained to adjust the brightness of the backlight source; the adjusting device is used for acquiring the corresponding adjusting instruction to adjust the brightness of the backlight source in the brightness adjusting range.

By adopting the technical scheme, the first acquisition module acquires the brightness of the current ambient light, the second acquisition module acquires the brightness of the current ambient light, the comparison module compares the brightness of the ambient light with the preset basic brightness to obtain a comparison result, the judgment module generates a dimming instruction according to the comparison result to dim the brightness of the backlight source, when the human body sensing module acquires the human body sensing signal, the judgment module generates a corresponding adjusting instruction according to the human body sensing signal and the corresponding dimming instruction to determine the brightness adjusting range, the execution module acquires the adjusting instruction to adjust the brightness of the backlight source, and thus the human body eye sensing module and the first acquisition module can be arranged to adjust the brightness of the backlight source according to different environments and conditions.

In a third aspect, the present application provides a backlight brightness adjustment apparatus, which adopts the following technical scheme:

a backlight luminance adjustment device, comprising:

the first brightness sensor is used for sensing the current ambient light brightness;

a second brightness sensor for sensing the brightness of the backlight source;

the camera is used for acquiring a face image;

the signal processor is used for identifying, analyzing and processing the data acquired by the first brightness sensor, the second brightness sensor and the camera;

the controller is used for receiving the brightness of the current ambient light sensed by the first brightness sensor, the brightness of the backlight source sensed by the second brightness sensor and the face image collected by the camera and controlling the brightness of the backlight source within a brightness adjusting range, the output end of the controller is electrically connected with the output end of the signal processor, and the output end of the controller is electrically connected with the backlight source.

Through adopting above-mentioned technical scheme, the luminance of current ambient light of first sensor sensing, the luminance of second sensor sensing backlight, the camera mainly gathers people's face image, in order catching and obtaining user's eye image and face key feature image, in order to generate human sensing signal, signal processor is to the camera, data that first luminance sensor and second sensor gathered are discerned and are analyzed and transmit to the controller in, the treater of controller is handled luminance signal and the image information who gathers and is generated first human sensing signal and second human sensing signal, thereby the luminance of control backlight, in order to make the more humanized of regulation of backlight, the suitability is strong.

In a fourth aspect, the present application provides a display device, which adopts the following technical solutions,

a display device comprises a display panel, a backlight source and the backlight source adjusting device, wherein the backlight source is arranged below the display panel, and the backlight source is electrically connected with the controller of the backlight source brightness adjusting device.

In a fifth aspect, the application provides a readable storage medium, which adopts the following technical solutions:

a readable storage medium stores a computer program that can be loaded by a processor and executes, for example, a backlight luminance adjusting method.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the brightness of the backlight source can be adjusted according to the ambient light and can be finely adjusted according to the human body sensing signal by using the brightness of the human body signal and the ambient light as double judgment conditions, so that the brightness of the backlight source is suitable for different users, and the comfort of the users in using the display is improved;

2. the brightness of the current ambient light is collected through the first brightness sensor, the brightness of the backlight source is collected through the second brightness sensor, the face image is collected through the camera, the signals transmitted by the first brightness sensor, the second brightness sensor and the camera are received by the controller and then processed, and therefore the brightness of the backlight source is controlled to be automatically adjusted, and the brightness requirements of different users are met.

Drawings

FIG. 1 is a block diagram of a process for adjusting the brightness of a backlight according to the present application;

FIG. 2 is a schematic structural diagram of a backlight brightness adjustment system according to the present application;

FIG. 3 is a schematic structural diagram of a backlight luminance adjusting apparatus according to the present application;

fig. 4 is a schematic structural diagram of a display device of the present application.

Description of reference numerals:

1. a first acquisition module; 2. a comparison module; 3. a judgment module; 4. an execution module; 5. a human body sensing module; 6. a second acquisition module; 7. a backlight source; 8. a first brightness sensor; 9. a second brightness sensor; 10. a camera; 11. a signal processor; 12. a controller; 13. a backlight source brightness adjusting device; 14. a display panel.

Detailed Description

The application discloses a backlight brightness adjusting method.

A method for adjusting brightness of a backlight source, as shown in fig. 1, includes the following steps:

and S1, acquiring the current ambient light brightness, and comparing the current ambient light brightness with the preset basic brightness to obtain a comparison result.

The brightness of the current ambient light refers to the brightness of the ambient light outside the display, and is obtained by the first brightness sensor 8 mounted on the display. The preset basic brightness refers to the basic brightness that a user can see the screen clearly.

Meanwhile, in order to determine the brightness adjustment standard of the backlight 7 to meet the requirement that the user clearly sees the basic brightness of the display screen at the brightness of different ambient lights, after the brightness of the current ambient light is obtained, the current ambient light needs to be compared with the preset basic brightness to obtain the following comparison result:

1) if the brightness of the ambient light is less than the preset basic brightness, it indicates that the brightness of the ambient light is relatively low, that is, the light of the environment where the display is located is insufficient, and the brightness of the backlight 7 at this time needs to be greater than the brightness of the ambient light, so that the display screen can be seen clearly.

2) If the brightness of the ambient light is greater than the preset basic brightness, it indicates that the brightness of the ambient light is brighter, that is, it indicates that the light of the environment where the backlight 7 is located is sufficient, and the brightness of the backlight 7 at this time needs to be less than or equal to the brightness of the ambient light to enable the user to see the screen clearly.

And S2, obtaining the brightness of the backlight source 7, generating a dimming instruction according to the comparison result, setting standard adjustment brightness, wherein the dimming instruction comprises a first dimming instruction and a second dimming instruction, and adjusting the brightness of the backlight source 7 to the standard adjustment brightness according to the dimming instruction.

In the present embodiment, the luminance of the backlight 7 is acquired by the plurality of second luminance sensors 9 attached to the backlight 7. More specifically, the luminance of the backlight 7 is adjusted by controlling the current or voltage of a plurality of light emitting units, which are light emitting diodes, in the driven backlight 7.

It should be noted that the dimming instruction is an instruction for adjusting the brightness of the backlight 7, where the first dimming instruction is used to adjust the brightness of the backlight 7 to the standard adjusted brightness by using a preset basic brightness as a standard; the second dimming instruction is used to adjust the luminance of the backlight 7 to the standard adjustment luminance with the luminance of the ambient light as the standard adjustment luminance.

Therefore, the following steps are performed after the steps of obtaining the brightness of the backlight 7, generating a corresponding dimming command according to the comparison result, and setting the standard adjustment brightness:

(1) the brightness of the backlight 7 is obtained, and when the brightness of the ambient light is smaller than the preset basic brightness, the preset basic brightness is used as a standard to adjust the brightness, and a first dimming instruction is generated to adjust the brightness of the backlight 7 to the standard adjusted brightness.

In this embodiment, the brightness of the backlight 7 is obtained, and if the brightness of the ambient light is less than the preset basic brightness, in order to enable the display screen to be seen clearly, the preset basic brightness is used as a standard to adjust the brightness, so that the brightness of each partition of the backlight 7 is adjusted to the standard adjusted brightness, and thus the brightness of the backlight 7 can be automatically adjusted even when the display is in a dark environment, so that a user can see the screen clearly.

(2) Acquiring the brightness of the backlight 7, and when the brightness of the ambient light is smaller than the preset basic brightness, taking the brightness of the ambient light as the standard adjustment brightness, generating a second dimming instruction to adjust the brightness of the backlight 7 to the standard adjustment brightness.

The brightness of the current ambient light is taken as a standard to adjust the brightness, so that the brightness of the backlight source 7 is adjusted to the current brightness of the ambient light, and thus the brightness of the backlight source 7 is close to the brightness of the ambient light, thereby meeting the basic requirement that a user can clearly see a screen when using the screen.

Example (c): if the set preset basic luminance is 50cd, if the luminance of the obtained current ambient light is 30 cd and the luminance of the backlight 7 is 40 cd, comparing the luminance of the current ambient light with the preset basic luminance, and if the luminance of the current ambient light is less than the preset basic luminance, setting the preset basic luminance as a standard to adjust the luminance, and generating a first adjustment instruction, wherein the luminance of the backlight 7 is adjusted by taking the preset basic luminance as the standard to adjust the luminance; if the acquired brightness of the current ambient light is 60 cd, setting the current ambient light as the preset basic brightness, and generating a second dimming instruction, where the brightness of the backlight 7 is adjusted by using the brightness of the current ambient light as the standard brightness adjustment.

And S3, obtaining a human body sensing signal, wherein the human body sensing signal comprises a first human body sensing signal and a second human body sensing signal, determining a brightness adjusting range and generating a corresponding adjusting instruction according to the human body sensing signal and the dimming instruction, the adjusting instruction comprises a first adjusting instruction, a second adjusting instruction, a third adjusting instruction and a fourth adjusting instruction, the brightness adjusting range comprises a first brightness adjusting range and a second brightness adjusting range, and the brightness of the backlight source 7 in the brightness adjusting range is adjusted according to the corresponding adjusting instruction.

The brightness adjustment range is determined according to the standard adjustment brightness, and specifically, the standard adjustment brightness is used as a middle value of the brightness adjustment range, so that the brightness adjustment range is [ a first brightness adjustment threshold, a second brightness adjustment threshold ], where the first brightness adjustment threshold = the standard adjustment brightness-difference value, and the second brightness adjustment threshold = the standard adjustment brightness + difference value, and the difference value is a brightness difference value acceptable to the eyes of the user.

The adjustment instruction is an instruction for adjusting the brightness of the backlight 7 according to the human body sensing signal and the dimming instruction, wherein the first adjustment instruction is to reduce the brightness of the backlight 7 within a first brightness adjustment range according to the received first human body sensing signal and the first dimming instruction; the second adjustment instruction is to reduce the luminance of the backlight 7 within a second luminance adjustment range according to the received first human body sensing signal and the second dimming instruction; the third adjusting instruction is to increase the brightness of the backlight source 7 within the first brightness adjusting range according to the acquired second human body sensing signal and the first dimming instruction; the fourth adjustment instruction is to increase the brightness of the backlight 7 within the second brightness adjustment range according to the acquired second human body sensing signal and the second dimming instruction.

And S31, acquiring a first human body sensing signal.

Specifically, sensing the first human body sensing signal is a signal that senses discomfort generated when the user watches the screen, and in real life, if the screen is too bright when the user watches the screen, discomfort conditions such as visual fatigue, dry eyes, and dazzling are easily generated.

The specific steps of S31 are as follows:

s311, obtaining a human face image frame sequence at regular time, and extracting an eye image from each human face image frame.

In this embodiment, the timing acquisition of the face image frame sequence refers to acquiring a face image frame sequence formed by analyzing a captured face video at intervals, and extracting an eye image from each face image frame, for example, acquiring a face image frame sequence with a period of 30 seconds every 5 minutes.

And S312, analyzing and identifying the eye image, generating eye image information, matching the eye image information with preset eye image information, and judging the type of the eye image, wherein the type of the eye image comprises an open eye image type and a closed eye image type.

The preset eye image information is obtained by loading a pre-recorded eye image into a pre-set eye image training model sample for learning and acquisition, specifically, the eye image training model sample comprises an eye opening image model and an eye closing image model, and is obtained by capturing a large number of eye opening images and eye closing images in advance and acquiring eye key points or eye features such as pupils or eye corners and the like.

After the eye image information is matched with the preset eye image information, if the eye opening image information in the eye image information is matched with the preset eye opening image information, judging the eye opening image type; and if the eye closing image information in the eye image information is matched with the preset eye closing image information, judging that the eye closing image is of the eye closing image type.

And S313, setting the marks of each frame of face image according to the eye image type of each frame, and generating a face image mark sequence.

In this embodiment, if the eye image type is determined to be an eye-open image, the flag of the human face image frame is determined to be 1; and if the eye image type is judged to be the eye closing image, determining that the face image frame is marked as 0, and generating a corresponding face image mark sequence according to the sequence of the face image frame sequences.

And S314, calculating the frequency of the blinking actions of the user based on the face image marking sequence.

Specifically, the specific steps of S314 are as follows:

s3141, setting calculation rules according to the first bit marks of the face image mark sequence, wherein the calculation rules comprise a first calculation rule and a second calculation rule.

The specific rule is as follows:

(1) when the first bit of the face image mark sequence is 1, the first calculation rule is set.

If the first bit of the facial image mark sequence is 1, the first frame of the facial image frame sequence is an eye-opening image, and the eye-opening image is accumulated for 1 time of completing the blinking action until the mark of the facial image sequence frame in the facial image mark sequence is read as 0, and the sequence marks are read according to the sequence and the number of times of completing the blinking action is accumulated.

(2) And when the first bit of the face image mark sequence is 0, setting the face image mark sequence as a second calculation rule.

If the first bit of the face image mark sequence is 0, indicating that the first frame image of the face image frame sequence is a closed-eye image, accumulating for 1 time of completing blinking actions until the mark of the face image mark sequence is read as 1, reading the sequence mark according to the sequence and accumulating the times of completing the blinking actions.

S3142, the frequency of the blinking completion of the user is calculated according to the calculation rule.

If the eye moving image frame sequence is set to be 111011101, reading is started from the first digit mark, if the first digit mark is read to be 1, the reading sequence is continued until the mark is read to be 0, blinking is accumulated to be 1, and according to the sequence, the number of times of blinking completed by the face moving image frame sequence is 2;

setting the eye moving image sequence as 0111011011, starting reading from the first digit mark until the mark is read as 1, then accumulating the number of complete blinking actions as 1, according to the sequence, the number of complete blinking actions of the face image frame sequence is 3.

And S315, comparing the frequency of the blinking actions of the user with a preset frequency to obtain a comparison result, and determining whether to generate a first human body sensing signal.

(1) If the frequency of the user completing the blinking actions is smaller than or equal to the preset frequency value, the blinking action frequency of the user is in the normal blinking frequency, the condition of visual fatigue, dazzling or dry eyes does not exist, and the first human body sensing signal is determined not to be generated.

If the user completes 8 blinks within 10 seconds, the predetermined number of blinks is 10, indicating that the user blinks normally.

(2) If the number of times that the user completes the blinking actions in the period is larger than the preset number value, the user is indicated to blink frequently, and the user has the condition of eye discomfort, and the first human body sensing signal is determined to be generated.

If the user completes 9 blinks within 10 seconds and the preset value is 6 times, it indicates that the user frequently blinks and may have discomfort such as visual fatigue or eye dryness, and a first human body sensing signal needs to be generated.

S32, when the first human body sensing signal is acquired and the first dimming instruction is received, determining a first luminance adjustment range according to the acquired first dimming instruction and the first human body sensing signal, generating a first adjustment instruction, and decreasing the luminance of the backlight 7 within the first luminance adjustment range according to the first adjustment instruction.

Specifically, when the first human body sensing signal is acquired, it indicates that the user has symptoms such as visual fatigue, dry eyes, or glare, which may be caused by a large contrast between the ambient light and the brightness of the backlight 7 due to the fact that the ambient light is too dark and the brightness of the backlight 7 is too bright.

Therefore, the difference between the current brightness of the ambient light and the brightness of the backlight 7 is reduced, so that the brightness of the backlight 7 is closer to the ambient light, and the discomfort of the eyes of the user is reduced. That is, the preset difference value is subtracted from the current brightness value of the backlight 7 within the first brightness adjustment range to obtain a new brightness value, and the brightness of the backlight 7 is reduced to the new brightness value.

S33, when the first human body sensing signal is acquired and the second dimming instruction is received, determining a second luminance adjustment range according to the acquired first human body sensing signal and the second dimming instruction, generating a second dimming instruction, and decreasing the luminance of the backlight 7 within the second luminance adjustment range according to the second dimming instruction.

Specifically, when the first human body sensing signal is acquired, which indicates that the user has eye discomfort, it may be caused by the fact that the luminance of the backlight 7 is too bright relative to the user, and therefore, the luminance of the backlight 7 needs to be reduced within the second luminance adjustment range, that is, the current luminance value of the backlight 7 is subtracted by a preset difference value to obtain a new luminance value, so that the current luminance value of the backlight 7 is reduced to the new luminance value.

And S34, acquiring a second human body sensing signal.

The specific steps of S34 are as follows:

and S341, acquiring the face image, identifying the face image, and identifying key features on the face image.

The key features are features that can be obviously collected and must be present on the face image, such as eyes, mouth, ears, nose and the like, and the eyes are taken as the key features in the embodiment.

And S342, calculating parameter values of key features on the human face.

In this embodiment, the parameter values of the key features on the face are parameters that can calculate the magnification or reduction times of the key features to obtain the distance from the face to the screen, such as the distance between the two eyes and the length of a single eye.

And S343, comparing the parameter value of the key feature of the face with the preset parameter value of the corresponding key feature to obtain a comparison result.

(1) And when the obtained parameter value of the key feature of the face is smaller than the preset parameter value of the corresponding key feature, indicating that the distance between the face and the screen is smaller than the preset distance between the face and the screen, and determining that the distance between the face and the screen is short.

(2) And when the obtained parameter value of the key feature of the face and the preset parameter value of the corresponding key feature indicate that the distance between the face and the screen is greater than the preset distance between the face and the screen, determining that the distance between the face and the screen is longer.

And S344, determining whether to generate a second human body sensing signal according to the comparison result.

1) When the parameter value of the face key feature is smaller than the preset parameter value of the corresponding key feature, it indicates that the brightness of the backlight 7 is low, and the user needs to watch the screen before seeing the screen clearly, and then determines to generate a second human body sensing signal.

2) When the parameter value of the key feature of the human face is smaller than the preset parameter value of the corresponding key feature, it indicates that the brightness of the backlight 7 is brighter, and the user can see the screen clearly, and then determines that the second human body sensing signal is not generated.

And S35, when the second human body sensing signal is acquired and the first dimming instruction is received, determining that the brightness adjustment range is the first brightness adjustment range according to the acquired second human body sensing signal and the first dimming instruction, generating a third adjustment instruction, and increasing the brightness of the backlight source 7 within the first brightness adjustment range according to the third adjustment instruction.

Specifically, the current luminance of the backlight 7 is increased by a preset difference value within the first luminance adjustment range to obtain a new luminance value, and the luminance of the backlight 7 is adjusted to a new target luminance value, so that the luminance of the backlight 7 is adjusted to be bright.

And S36, when the second human body sensing signal is acquired and the second dimming instruction is received, determining that the brightness adjustment range is the second brightness adjustment range according to the acquired second human body sensing signal and the second dimming instruction, generating a fourth adjustment instruction, and increasing the brightness of the backlight source 7 within the second brightness adjustment range according to the fourth adjustment instruction.

Specifically, the brightness of the backlight 7 is increased by a preset difference value within the second brightness adjustment range to obtain a new brightness value, so that the brightness of the backlight 7 is adjusted to a new target brightness value, thereby improving the applicability of the user.

The application also discloses a backlight brightness adjusting system.

As shown in fig. 2, a backlight brightness adjusting system includes:

the first acquisition module 1 is used for acquiring the brightness of the current ambient light;

the second obtaining module 6: for obtaining the brightness of the backlight 7;

human body sensing module 5: acquiring human body sensing signals, wherein the human body sensing signals comprise a first human body sensing signal and a second human body sensing signal;

and a comparison module 2: comparing the brightness of the ambient light with a preset basic brightness to obtain a comparison result;

a judging module 3: generating a dimming instruction according to the comparison result, wherein the dimming instruction comprises a first dimming instruction and a second dimming instruction; the dimming control device is used for determining a brightness adjusting range according to the human body sensing signal and the dimming instruction, wherein the brightness adjusting range comprises a first brightness adjusting range and a second brightness adjusting range, and corresponding adjusting instructions are generated and comprise a first adjusting instruction, a second adjusting instruction, a third adjusting instruction and a fourth adjusting instruction.

The execution module 4: for obtaining an adjustment instruction to adjust the brightness of the backlight 7 within the brightness adjustment range.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the system is divided into different functional units or modules to perform all or part of the above-mentioned functions.

For the specific definition of the backlight brightness adjusting system, reference may be made to the above definition of a backlight brightness adjusting method, which is not described herein again. All or part of the modules in the backlight brightness adjusting system can be realized by software, hardware and a combination thereof. The modules may be embedded in a hardware form or a processor in the controller 12 independent from the backlight brightness adjusting device 13, or may be stored in the controller 12 in a software form, so that the processor calls and executes operations corresponding to the modules.

The application also discloses a backlight brightness adjusting device.

As shown in fig. 3, a backlight brightness adjusting apparatus includes:

the first brightness sensor 8 is used for acquiring the brightness of the current environment;

a second luminance sensor 9 for acquiring the luminance of the backlight 7;

the camera 10 is used for acquiring a face image;

the signal processor 11 is used for performing signal identification analysis and processing on the data acquired by the first brightness sensor 8, the second brightness sensor 9 and the camera 10;

and the controller 12 is configured to receive the brightness of the current ambient light sensed by the first brightness sensor 8, the brightness of the backlight 7 sensed by the second brightness sensor 9, and a face image collected by the camera 10, and control the brightness of the backlight 7 within a brightness adjustment range, where an output end of the controller 12 is electrically connected to an output end of the signal processor 11, and an output end of the controller 12 is electrically connected to the backlight 7.

The application discloses a display device.

As shown in fig. 4, a display device, such as a liquid crystal display, includes a display panel 14, a backlight 7 located below the display panel 14, and a backlight brightness adjusting device 13 as described above, the backlight brightness adjusting device 13 is used for controlling and adjusting the brightness of the backlight 7, and the backlight 7 is electrically connected to the output end of the controller 12 of the backlight brightness adjusting device 13.

The controller 12 includes a processor connected via a system bus, an internal memory, a computer program stored in the memory and running on the processor, a network interface, and a database, wherein the computer program is executed by the processor to implement the method for adjusting the brightness of the backlight 7 disclosed above.

The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium, and the network interface may preferably be a standard wired interface as well as a wireless interface (e.g., WIFI interface). The network may be the internet as well as a WIFI network, and the various devices in the network environment may be configured as communication networks received according to various wired and wireless communication protocols.

The application also discloses a readable storage medium.

A readable storage medium storing a computer program capable of being loaded by a processor and executing the backlight brightness adjusting method as described above, the readable storage medium comprising, for example: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only memory (ROM), a random access memory, a magnetic disk, or an optical disk.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware, or can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.