CN104252828B - Protect display methods, display device and the terminal device of eyesight - Google Patents

Abstract

Embodiments of the present invention provide a display method, a display device, and a terminal device for protecting eyesight. In the display method for protecting eyesight, the face image of the current user is acquired; then, the image displayed on the screen of the terminal is adjusted according to the face image and the user's vision value. Thus, the terminal device can adjust the image displayed on the terminal screen in real time according to the current usage situation of the user, thereby bringing greater convenience to the user.

Description

Display method, display device and terminal device for protecting eyesight

technical field

Embodiments of the present invention relate to communication technologies, and in particular, to a display method, a display device, and a terminal device for protecting eyesight.

Background technique

With the development of science and technology, people are using more and more multimedia terminal devices, such as smart phones and tablet computers.

At the same time, multimedia terminal devices have brought more and more convenient life to people. For example, people can browse webpages, query content, read e-books, and even play games anytime and anywhere through multimedia terminal devices.

However, in the process of using multimedia terminal equipment, when the user himself feels the need to adjust the size of the fonts and pictures displayed on the mobile phone screen, as well as the display brightness, manual adjustments are performed, which cannot be performed in real time according to the current vision conditions and the distance of use. Display processing, thereby making it inconvenient for users to use.

Contents of the invention

Embodiments of the present invention provide a display method, a display device, and a terminal device for protecting eyesight, which can solve the problem that real-time display processing cannot be performed according to the user's current eyesight condition and usage distance.

In the first aspect, a display method for protecting eyesight is provided, including:

Get the face image of the current user;

The image displayed on the screen of the terminal is adjusted according to the facial image and the vision value of the user.

In a first possible implementation manner of the first aspect, the adjusting the image displayed on the screen of the terminal according to the facial image and the vision value of the user includes:

Recognize the facial image, and obtain the size of the facial image;

Comparing the facial image size with a standard facial image size to obtain a first difference, the standard facial image size is the user's facial image size corresponding to the user's customary distance, wherein the customary distance is Detecting the average value of the distance between the user's face and the terminal lens, or the distance defined by the user;

If the absolute value of the first difference is greater than a first preset value, adjusting the image displayed on the screen of the terminal.

In the first aspect or the first possible implementation manner of the first aspect, in the second possible implementation manner, according to the facial image and the vision value of the user, the screen of the terminal adjustments to the image shown above, including:

Adjust the size of the image displayed on the terminal screen according to the corresponding relationship between the first difference and the image size scaling factor and the corresponding relationship between the user's vision value and the image size scaling factor , the image size scaling factor is the ratio of the standard facial image size to the facial image size; or

According to the corresponding relationship between the first difference and the amount of change in contrast and/or brightness of the image and the corresponding relationship between the visual acuity value of the user and the amount of change in contrast and/or brightness of the image, the The contrast and/or brightness of the image displayed on the terminal screen is adjusted.

In the second possible implementation manner of the first aspect to the first aspect, in the third possible implementation manner, after comparing the facial image size with the standard facial image size and obtaining the first difference ,Also includes:

If the absolute value of the first difference is greater than the preset difference, according to the corresponding relationship between the first difference and the distance change between the face and the terminal lens, obtain all the current user's The current distance between the face and the terminal lens;

Comparing the customary distance between the user's face and the lens of the terminal with the current distance to obtain a second difference;

If the absolute value of the second difference is greater than a second preset difference, the image displayed on the screen of the terminal is adjusted according to the second difference and the vision value of the user.

In the third possible implementation manner of the first aspect, in the fourth possible implementation manner, after acquiring the facial image of the current user, further include:

Comparing the facial image size with a standard facial image size to obtain a first ratio;

If the first ratio is greater than the first preset ratio, sending first prompt information to the user to remind the user that the distance between the user and the terminal lens is relatively far;

If the first ratio is smaller than the second preset ratio, sending second prompt information to the user to remind the user that the distance between the user and the terminal lens is relatively short.

In the fourth possible implementation manner of the first aspect, in the fifth possible implementation manner, the user's vision is tested by receiving an input operation of the eye chart displayed on the screen of the terminal by the user , to obtain the vision value of the user; or

The terminal receives the user vision value input by the user.

In the second aspect, a display device for protecting eyesight is provided, including:

An acquisition module, configured to acquire the facial image of the current user;

A processing module, configured to adjust the image displayed on the screen of the terminal according to the facial image and the vision value of the user.

In a first possible implementation manner of the second aspect, the processing module includes:

an acquisition unit, configured to identify the facial image and acquire the size of the facial image;

A calculation unit, configured to compare the facial image size with a standard facial image size to obtain a first difference, the standard facial image size being the user's facial image size corresponding to the user's customary distance, wherein, The customary distance is the average value of the distance between the user's face and the terminal lens, or the distance defined by the user;

An adjustment unit, configured to adjust the image displayed on the screen of the terminal if the absolute value of the first difference is greater than a first preset value.

In the second aspect or the first possible implementation manner of the second aspect, in the second possible implementation manner, according to the facial image and the vision value of the user, the screen of the terminal adjustments to the image shown above, including:

The adjustment unit is specifically configured to, according to the corresponding relationship between the first difference and the image size scaling factor and the corresponding relationship between the user's vision value and the image size scaling factor, display on the terminal screen The size of the image is adjusted, and the image size scaling factor is the ratio of the standard facial image size to the facial image size; or, according to the contrast and/or brightness of the first difference and the image and the corresponding relationship between the visual acuity value of the user and the contrast and/or brightness of the image, and adjust the contrast and/or brightness of the image displayed on the terminal screen.

In the second possible implementation manner of the second aspect to the second aspect, in the third possible implementation manner, the processing module further includes: a comparison unit,

The acquisition unit is further configured to: if the absolute value of the first difference is greater than a preset difference, according to the corresponding relationship between the first difference and the distance variation between the face and the terminal lens , obtaining the current distance between the face of the current user and the lens of the terminal;

The comparison unit is configured to compare the customary distance between the user's face and the lens of the terminal with the current distance to obtain a second difference;

The adjustment unit is specifically configured to display on the screen of the terminal according to the second difference and the user's vision value if the absolute value of the second difference is greater than the second preset difference. The image is adjusted.

In the third possible implementation manner of the second aspect, in the fourth possible implementation manner, it further includes: a comparison module and a prompt module,

The comparison module is used to compare the facial image size with the standard facial image size to obtain the first ratio;

The prompt module is configured to send a first prompt message to the user if the first ratio is greater than a first preset ratio, to remind the user that the distance between the user and the terminal lens is relatively far; if the If the first ratio is smaller than the second preset ratio, second prompt information is sent to the user to remind the user that the distance between the user and the terminal lens is relatively short.

In the fourth possible implementation manner of the second aspect, in the fifth possible implementation manner, the obtaining module is further configured to receive an input operation of the eye chart displayed on the screen of the terminal by the user, Test the user's vision to obtain the user's vision value; or accept the user's vision value input by the user.

In a third aspect, there is provided a terminal device, including: the terminal display device for protecting eyesight according to any one of the possible implementation manners of the second aspect to the second aspect.

The display method, display device, and terminal device for protecting eyesight provided by the embodiments of the present invention obtain the facial image of the current user; then, adjust the image displayed on the terminal screen according to the facial image and the user's vision value. Thus, the terminal device can adjust the image displayed on the terminal screen in real time according to the current use situation of the user, thereby bringing great convenience to the use of the user.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

FIG. 1 is a schematic flowchart of an embodiment of the display method for protecting eyesight of the present invention;

FIG. 2 is a schematic flowchart of another embodiment of the display method for protecting eyesight of the present invention;

Fig. 3 is a schematic flowchart of another embodiment of the display method for protecting eyesight of the present invention;

4 is a schematic structural view of an embodiment of a display device for protecting eyesight of the present invention;

Fig. 5 is a schematic structural view of another embodiment of the display device for protecting eyesight of the present invention;

FIG. 6 is a schematic structural diagram of another embodiment of the display device for protecting eyesight according to the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The display method for protecting eyesight provided by the embodiments of the present invention can be specifically applied when a user is using a terminal device, and the terminal device may be a smart phone or a tablet computer. The vision-protecting display method provided in this embodiment can be specifically implemented by a vision-protecting display device, which can be integrated into a terminal device, and the vision-protecting display device can use software and/or hardware to implement accomplish. The display method for protecting eyesight provided by this embodiment will be described in detail below.

Fig. 1 is a schematic flowchart of an embodiment of the display method for protecting eyesight of the present invention. As shown in Fig. 1, the method of this embodiment can be executed by a display device for protecting eyesight, and the display device can be implemented by means of hardware and/or software Realized, it can be integrated into a terminal device, and the display device is generally equipped with a lens and a display screen. The method comprises the steps of:

Step 101, acquire the facial image of the current user.

In this embodiment, the vision-protecting display device may periodically acquire the facial image of the current user, or the user may make the terminal acquire the facial image of the current user by taking pictures. Wherein, the facial image may be the current entire facial image of the user, or may be a certain organ of the user, such as eyes.

Step 102, adjust the image displayed on the screen of the terminal according to the face image and the user's vision value.

Specifically, according to the facial image and the user's vision value, there are at least two applicable scenarios for adjusting the image displayed on the screen of the terminal:

The first applicable scenario is to identify the facial image and obtain the size of the facial image; then, compare the size of the facial image with the size of the standard facial image to obtain the first difference. The standard facial image size is the user’s face corresponding to the user’s customary distance Image size, where the customary distance is the average value of the multiple-use distances between the detected user's face and the terminal lens, or a user-defined distance; then, if the absolute value of the first difference is greater than the first preset value, Then adjust the image displayed on the screen of the terminal.

The second applicable scenario is to identify the facial image and obtain the facial image size; then, compare the facial image size with the standard facial image size to obtain the first difference, if the absolute value of the first difference is greater than the preset difference, According to the corresponding relationship between the first difference and the distance variation between the face and the terminal lens, the current distance between the current user's face and the terminal lens is obtained; then, the customary distance between the user's face and the terminal lens is compared with Comparing the current distances to obtain a second difference; if the absolute value of the second difference is greater than the second preset difference, adjusting the image displayed on the screen of the terminal according to the second difference and the user's vision value.

It should be noted that no matter which of the above applicable scenarios, the implementation of adjusting the image displayed on the screen of the terminal includes at least the following two methods:

The first implementation mode is to adjust the size of the image displayed on the terminal screen according to the corresponding relationship between the first difference value and the zoom factor of the image size and the corresponding relationship between the zoom factor of the image size of the user's vision value, and the zoom factor of the image size is the ratio of the standard facial image size to the facial image size; or

In the second implementation mode, according to the corresponding relationship between the first difference value and the contrast and/or brightness change of the image and the corresponding relationship between the contrast and/or brightness change of the user's visual acuity value image, the terminal screen displays the The contrast and/or brightness of the image can be adjusted.

It should be noted that, in this embodiment, the current distance between the user's face and the terminal lens is at least twice the focal length of the terminal lens.

The display method for protecting eyesight provided by the embodiment of the present invention obtains the facial image of the current user; then, adjusts the image displayed on the screen of the terminal according to the facial image and the user's vision value. Thus, the terminal device can adjust the image displayed on the terminal screen in real time according to the current use situation of the user, thereby bringing great convenience to the use of the user.

Fig. 2 is a schematic flowchart of another embodiment of the display method for protecting eyesight of the present invention. As shown in Fig. 2, the method includes the following steps:

Step 201, acquire the facial image of the current user.

The implementation principle of step 201 in this embodiment is similar to that of step 101, and will not be repeated here.

Step 202, identifying the face image, and acquiring the size of the face image.

In this embodiment, the vision-protecting display device can obtain the size of the facial image by recognizing the facial image of the current user, that is, the size of the user's face imaged on the terminal lens, for example, the height value of the facial image and/or The unit of the width value may be centimeter or pixel, and there is no limitation on the unit of the standard imaging size of the face in this embodiment.

Step 203, comparing the facial image size with the standard facial image size to obtain a first difference.

In this embodiment, the standard facial image size is the user's facial image size corresponding to the user's customary distance, wherein the customary distance is the average value of multiple use distances between the user's face and the terminal lens, for example, the user At the initial stage of using the terminal device, the distance between the user's face and the terminal lens is periodically obtained according to the measuring device set on the terminal device, and then the customary distance is finally obtained through average calculation, or the user-defined distance is the customary distance. For example, the user inputs a value in the terminal as the customary distance.

For example, the implementation of comparing the size of the face image with the size of the standard face image may specifically be: the display device periodically compares the size of the face image with the height value of the size of the standard face image to obtain the first difference, or , the display device compares the size of the facial image with the width value of the standard facial image size to obtain a first difference.

Step 204, if the absolute value of the first difference is greater than the first preset value, adjust the image displayed on the screen of the terminal.

Specifically, if the absolute value of the first difference is greater than the first preset value, the image displayed on the screen of the terminal is adjusted, including at least two implementations:

The first implementation mode is to adjust the size of the image displayed on the terminal screen according to the corresponding relationship between the first difference and the image size scaling factor and the user's vision value, wherein the image size scaling factor is the facial image size and Ratio of standard face image dimensions.

Specifically, if the first difference is greater than zero, the ratio of the facial image size to the standard facial image size is used as the image size scaling factor, that is, the reduction factor, and the size of the image displayed on the terminal screen is adjusted according to the user's vision value. Make adjustments, i.e. zoom out. If the first difference is less than zero, the ratio of the facial image size to the standard facial image size is used as the image size scaling factor, that is, the magnification factor, and according to the corresponding relationship between the user's vision value and the image size scaling factor, on the terminal screen The size of the displayed image is adjusted, ie enlarged.

For example, the standard facial image size is divided by the facial image size, and the obtained ratio is used as the display multiple, and the image size displayed on the terminal screen is adjusted according to the ratio. For example, the user's vision value is 1.0, and the user and the terminal The customary distance between the screens is 30 centimeters. At the initial stage of the user’s use of the terminal device, the standard facial image obtained by the display device is 4 centimeters. The size of the image displayed on the terminal screen is based on the user’s vision value and customary distance. , when the user uses the terminal device, the terminal device can obtain the user's face image with a height of 5 cm, and the image size on the terminal screen can be reduced according to the ratio of 4/5.

In the second implementation mode, according to the corresponding relationship between the first difference value and the amount of change in the contrast and/or brightness of the image and the corresponding relationship between the user's vision value and the amount of change in the contrast and/or brightness of the image, the information displayed on the terminal screen to adjust the contrast and/or brightness of the image.

Specifically, if the first difference is greater than zero, it can be determined that the distance between the user and the terminal lens is less than the customary distance, then according to the corresponding relationship between the contrast and/or brightness change of the image and the contrast and/or contrast between the user's vision value and the image or the corresponding relationship of the change amount of the brightness, and reduce the contrast and/or brightness of the image displayed on the terminal screen. If the first difference is less than zero, it can be determined that the distance between the user and the terminal lens is greater than the customary distance, then adjust the height of the image displayed on the terminal screen according to the corresponding relationship between the image contrast and/or brightness change and the user's vision value contrast and/or brightness.

It should be noted that if the absolute value of the first difference is smaller than the first preset difference, it is considered to be a change in the distance between the user and the terminal screen caused by the shaking of the user's body, so that the image size displayed on the terminal screen is not adjusted. ; If the absolute value of the first difference is greater than the preset difference, the size of the image displayed on the terminal screen is adjusted according to the above-mentioned ratio, that is, the ratio of the current distance to the customary distance is multiplied by the image displayed on the terminal screen before adjustment Size as the image size displayed on the current terminal screen.

In the display method for protecting eyesight provided in this embodiment, by acquiring the facial image of the current user, and identifying the facial image, the size of the facial image is obtained, and then comparing the facial image size with the standard facial image size to obtain the first difference , and then, if the absolute value of the first difference is greater than the first preset value, adjusting the image displayed on the screen of the terminal. Thus, the terminal device can adjust the image displayed on the terminal screen in real time according to the current use situation of the user, thereby bringing great convenience to the use of the user.

Further, on the basis of the above-mentioned embodiments, after step 203, comparing the facial image size with the standard facial image size and obtaining the first difference, it may also include:

If the absolute value of the first difference is greater than the preset difference, according to the corresponding relationship between the first difference and the distance variation between the face and the terminal lens, the current distance between the current user's face and the terminal lens is obtained;

Comparing the customary distance between the user's face and the lens of the terminal with the current distance to obtain a second difference;

If the absolute value of the second difference is greater than the second preset difference, the image displayed on the screen of the terminal is adjusted according to the second difference and the vision value of the user.

In this embodiment, there are at least three ways to obtain the current distance between the current user's face and the terminal lens:

In the first implementation manner, the user may input the current distance between the user's face and the terminal lens on the terminal.

In the second implementation manner, the display device of the terminal may measure the proper distance between the user's face and the lens of the terminal according to the measuring equipment set on the terminal.

The third implementation method is to divide the product of the user's standard facial image size and the focal length of the terminal lens by the current face imaging size to obtain the current distance between the user and the terminal lens, where the standard facial image size is human The standard imaging size of the face is multiplied by the focal length of the terminal lens, and then the obtained product is divided by the customary distance.

In this embodiment, the customary distance between the user's face and the terminal's lens is compared with the current distance, and the absolute value of the second difference obtained is greater than the second preset difference, that is, the user's face and the terminal's lens After the difference between the current distance and the customary distance exceeds a range, the image displayed on the screen of the terminal will be adjusted. The specific adjustment method is similar to the principle and effect of the above embodiment, and will not be repeated here.

Fig. 3 is a schematic flowchart of another embodiment of the display method for protecting eyesight according to the present invention. As shown in Fig. 3, the method includes the following steps:

Step 301, acquire the facial image of the current user.

The implementation principle of step 301 in this embodiment is similar to that of step 101, and details are not repeated here.

Step 302: Comparing the facial image size with the standard facial image size to obtain a first ratio.

Step 303, comparing the first ratio with a preset ratio, and sending prompt information to the user according to the comparison result.

Specifically, the first ratio is compared with the first preset ratio, and if the first ratio is greater than the first preset ratio, it is determined that the current distance is greater than the customary distance, and a first prompt message is sent to the user to remind the user that the current distance with the terminal is The lens is located at a greater distance; or,

Comparing the first ratio with the second preset ratio, if the first ratio is smaller than the second preset ratio, it is determined that if the current distance is smaller than the customary distance, a second prompt message is sent to the user to remind the user of the current distance with the terminal lens The distance is relatively close.

Wherein, the first ratio includes the magnitude and direction of the first ratio, and the first preset ratio is greater than the second preset ratio.

The display method for protecting eyesight provided by the embodiment of the present invention obtains the facial image of the current user, and then compares the facial image size with the standard facial image size to obtain the first ratio, and then compares the first ratio with the preset ratio Make a comparison, and send a prompt message to the user according to the comparison result. Thus, the terminal device can adjust the image displayed on the terminal screen in real time according to the current use situation of the user, thereby bringing great convenience to the use of the user.

Furthermore, while sending the prompt information to the user, the image displayed on the screen of the terminal can also be adjusted. The specific manner of adjusting the image displayed on the screen of the terminal is similar to the foregoing embodiment, and will not be repeated here.

On the basis of the above-mentioned embodiments, the display method for protecting eyesight may further include: acquiring the user's eyesight value, and the specific implementation method is as follows:

The first implementation manner is to test the user's vision and obtain the user's vision value by receiving an input operation of the user's vision chart displayed on the screen of the terminal.

Specifically, after the terminal is turned on or unlocked, the user can perform vision testing through the terminal, that is, the user maintains a customary distance from the terminal, such as 30 cm, for vision testing, wherein the terminal is provided with vision testing software. The specific method for visual acuity detection can be as follows: firstly display the character with visual acuity of 1.0 on the terminal screen, and judge the opening direction of character E by sliding the finger. If the direction is wrong, the terminal screen will display the character with visual acuity of 0.8, and the user continues to slide the finger to determine The opening direction of the character E until the detection is correct, and at the same time the terminal display device records the visual acuity value corresponding to the last character as the user visual acuity value, and establishes a visual acuity file. The visual acuity file can include: test time, visual acuity value, user habitual distance, user Comfortable brightness and other information, such as time: 2012-12-20, vision value 0.8, habitual distance 30cm, comfortable brightness 65%, among which, the habitual distance can be manually input by the user, and the comfortable brightness can be manually input by the user or carried when leaving the factory the default value for .

It should be noted that, in this embodiment, the method for obtaining the user's visual acuity value according to the visual acuity chart displayed on the terminal screen is not limited to the above description, and can also be implemented according to any method conceivable by those skilled in the art.

In a second implementation manner, the terminal receives the user vision value input by the user.

After the terminal is powered on or unlocked, the user needs to input the vision value when filling in the vision file. The content of the vision file is similar to the content of the vision file in the above embodiment, and will not be repeated here.

The third implementation way is to detect the user's eyesight according to the difference between the current distance and the customary distance, and obtain the user's eyesight value.

When the user is using the terminal, when it is determined that the difference between the current distance and the customary distance exceeds the preset value, the user's vision can be detected and the user's vision value can be obtained, wherein the specific method of detecting the user's vision is the same as the above implementation Examples are similar and will not be repeated here.

With the method provided in this embodiment, at the initial stage of the user's use of the terminal, or during the user's use of the terminal, the user can know whether his vision has declined after the vision is detected, so as to determine the situation of using the terminal by himself, and then can provide Users automatically protect eyesight to provide conditions.

FIG. 4 is a schematic structural diagram of an embodiment of a display device for protecting eyesight of the present invention. As shown in FIG. 4 , the display device includes: an acquisition module 401 and a processing module 402, wherein the acquisition module 401 is used to acquire the current user's face An image; a processing module 402, configured to adjust the image displayed on the screen of the terminal according to the face image and the user's vision value.

The display method for protecting eyesight provided by the embodiment of the present invention obtains the facial image of the current user; then, adjusts the image displayed on the screen of the terminal according to the facial image and the user's vision value. In this way, the terminal device can adjust the image displayed on the terminal screen in real time according to the current use situation of the user, thereby bringing great convenience to the use of the user.

Fig. 5 is a schematic structural diagram of another embodiment of the display device for protecting eyesight according to the present invention. As shown in Fig. 5, on the basis of the above embodiment, the processing module 402 may include: an acquisition unit 4021, a calculation unit 4022 and an adjustment unit 4023 . Among them, the acquisition unit 4021 is used to identify the facial image and obtain the facial image size; the calculation unit 4022 is used to compare the facial image size with the standard facial image size to obtain the first difference. The standard facial image size is the user's customary distance The size of the corresponding user's facial image, wherein the customary distance is the average value of the multiple use distances between the detected user's face and the terminal lens, or a user-defined distance; the adjustment unit 4023 is used to determine the absolute value of the first difference When the value is greater than the first preset value, the image displayed on the screen of the terminal is adjusted.

Further, on the basis of the above-mentioned embodiments, the adjusting unit 4023 is specifically configured to, according to the corresponding relationship between the first difference value and the zoom factor of the image size and the corresponding relationship between the user's vision value and the zoom factor of the image size, display on the terminal screen. The size of the image is adjusted, and the zoom factor of the image size is the ratio of the size of the face image to the size of the standard face image; or, according to the corresponding relationship between the first difference and the amount of change in the contrast and/or brightness of the image and the user's visual acuity value and The corresponding relationship of the contrast and/or brightness change of the image adjusts the contrast and/or brightness of the image displayed on the terminal screen.

Optionally, on the basis of the above-mentioned embodiments, the acquisition unit 4021 is further configured to: if the absolute value of the first difference is greater than the preset difference, according to the first difference and the distance change between the face and the terminal lens Corresponding relationship, obtain the current distance between the current user's face and the terminal lens;

A calculation unit 4022, configured to compare the customary distance between the user's face and the lens of the terminal with the current distance to obtain a second difference;

The adjustment unit 4023 is specifically configured to adjust the image displayed on the screen of the terminal according to the second difference and the user's vision value if the absolute value of the second difference is greater than the second preset difference.

Further, optionally, the display device may also include: a comparison module 403 and a prompt module 404, wherein,

Comparison module 403, used to compare the size of the face image with the size of the standard face image, and obtain the first ratio;

The prompt module 404 is configured to send the first prompt message to the user if the first ratio is greater than the first preset ratio, to remind the user that the distance between the user and the terminal lens is relatively far; if the first ratio is smaller than the second preset ratio, Then, the second prompt information is sent to the user to remind the user that the distance between the user and the terminal lens is relatively short.

Further, the obtaining module 401 is also configured to test the user's vision and obtain the user's vision value by receiving an input operation of the user's vision chart displayed on the terminal screen; or accept the user's vision value input by the user.

Fig. 6 is a schematic structural diagram of another embodiment of a display device for protecting eyesight according to the present invention. As shown in Fig. 6, the display device includes: a display 601, an input device 602, a camera 603 and a processor 604, and the display 601 is used for displaying An image is displayed on the display device for protecting eyesight; the input device 602 is used to receive the input operation of the user; wherein, the camera 603 is used to obtain the facial image of the current user; the processor 604 is used to, according to the facial image and the user's vision value, The image displayed on the screen of the terminal is adjusted.

The display method for protecting eyesight provided by the embodiment of the present invention obtains the facial image of the current user; then, adjusts the image displayed on the screen of the terminal according to the facial image and the user's vision value. In this way, the terminal device can adjust the image displayed on the terminal screen in real time according to the current use situation of the user, thereby bringing great convenience to the use of the user.

On the basis of the above-mentioned embodiments, the processor 604 is specifically used to identify the facial image and obtain the facial image size; compare the facial image size with the standard facial image size to obtain the first difference, and the standard facial image size is the user's habit The size of the user's face image corresponding to the distance, wherein, the customary distance is the average value of multiple use distances between the detected user's face and the terminal lens, or a user-defined distance; if the absolute value of the first difference is greater than the first preset When setting the value, adjust the image displayed on the screen of the terminal.

Further, on the basis of the above-mentioned embodiments, the processor 604 is specifically configured to, according to the corresponding relationship between the first difference value and the image size scaling factor and the corresponding relationship between the user's vision value and the image size scaling factor, display on the terminal screen. The size of the image is adjusted, and the zoom factor of the image size is the ratio of the size of the face image to the size of the standard face image; or, according to the corresponding relationship between the first difference and the amount of change in the contrast and/or brightness of the image and the user's visual acuity value and The corresponding relationship of the contrast and/or brightness change of the image adjusts the contrast and/or brightness of the image displayed on the terminal screen.

Optionally, on the basis of the above-mentioned embodiments, the processor 604 is further configured to: if the absolute value of the first difference is greater than the preset difference, according to the first difference and the amount of change in the distance between the face and the terminal lens Corresponding relationship, obtain the current distance between the current user's face and the terminal lens; compare the customary distance between the user's face and the terminal lens with the current distance, and obtain the second difference; if the absolute value of the second difference If the value is greater than the second preset difference value, the image displayed on the screen of the terminal is adjusted according to the second difference value and the vision value of the user.

Further, optionally, the processor 604 is also used to compare the facial image size with the standard facial image size to obtain a first ratio; if the first ratio is greater than the first preset ratio, send the first ratio to the user. The prompt information is used to remind the user that the current distance from the terminal lens is far; if the first ratio is smaller than the second preset ratio, the second prompt information is sent to the user to remind the user that the current distance from the terminal lens is relatively short.

Further, the processor 604 is also configured to test the user's vision and obtain the user's vision value by receiving an input operation of the user's vision chart displayed on the terminal screen; or accept the user's vision value input by the user.

In this embodiment, the terminal device can adjust the image displayed on the terminal screen in real time according to the current usage of the user, thereby bringing greater convenience to the user

The terminal device in this embodiment of the present invention includes: any one of the display devices provided in the foregoing embodiments.

The terminal device provided by the embodiment of the present invention can adjust the image size displayed on the terminal screen by acquiring the current distance between the current user and the terminal lens. Therefore, the display device of the terminal can adjust the size of the image displayed on the terminal in real time according to the current use situation of the user, thereby bringing great convenience to the use of the user.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by program instructions and related hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (11)

1. A display method for preserving vision, comprising:

acquiring a face image of a current user;

adjusting an image displayed on a screen of the terminal according to the facial image and the vision value of the user;

wherein, the adjusting the image displayed on the screen of the terminal according to the face image and the vision value of the user comprises:

identifying the face image and acquiring the size of the face image;

comparing the facial image size with a standard facial image size to obtain a first difference value, wherein the standard facial image size is the facial image size of the user corresponding to the habit distance of the user, and the habit distance is an average value of multiple use distances between the detected face of the user and the terminal lens or a distance defined by the user;

and if the absolute value of the first difference is larger than a first preset value, adjusting the image displayed on the screen of the terminal.

2. The method according to claim 1, wherein the adjusting the image displayed on the screen of the terminal according to the face image and the user's eyesight value comprises:

adjusting the size of the image displayed on the terminal screen according to the corresponding relation between the first difference and the image size scaling factor and the corresponding relation between the visual force value of the user and the image size scaling factor, wherein the image size scaling factor is the ratio of the standard facial image size to the facial image size; or

And adjusting the contrast and/or brightness of the image displayed on the terminal screen according to the corresponding relation between the first difference and the variation of the contrast and/or brightness of the image and the corresponding relation between the visual force value of the user and the variation of the contrast and/or brightness of the image.

3. The method of claim 1, wherein after comparing the facial image size to a standard facial image size to obtain a first difference, further comprising:

if the absolute value of the first difference is larger than a preset difference, acquiring the current distance between the face of the current user and the terminal lens according to the corresponding relation between the first difference and the distance variation between the face and the terminal lens;

comparing the habitual distance between the face of the user and the lens of the terminal with the current distance to obtain a second difference value;

and if the absolute value of the second difference is larger than a second preset difference, adjusting the image displayed on the screen of the terminal according to the second difference and the visual force value of the user.

4. The method of claim 1, wherein after acquiring the face image of the current user, further comprising:

comparing the face image size with a standard face image size to obtain a first ratio;

if the first ratio is larger than a first preset ratio, sending first prompt information to the user to prompt that the user is far away from the terminal lens currently;

and if the first ratio is smaller than a second preset ratio, sending second prompt information to the user to prompt that the user is closer to the terminal lens currently.

5. The method according to any one of claims 1-4, wherein: further comprising:

testing the eyesight of the user by receiving the input operation of an eyesight table displayed on a screen of the terminal by the user to obtain the eyesight value of the user; or

And the terminal receives the vision value of the user input by the user.

6. A display device for protecting vision, comprising:

the acquisition module is used for acquiring a face image of a current user;

the processing module is used for adjusting the image displayed on the screen of the terminal according to the facial image and the vision value of the user;

wherein the processing module comprises:

an acquisition unit configured to identify the face image and acquire a size of the face image;

the calculating unit is used for comparing the facial image size with a standard facial image size to obtain a first difference value, wherein the standard facial image size is the facial image size of the user corresponding to the habit distance of the user, and the habit distance is an average value of multiple use distances between the detected face of the user and the terminal lens or a distance defined by the user;

and the adjusting unit is used for adjusting the image displayed on the screen of the terminal if the absolute value of the first difference is greater than a first preset value.

7. The apparatus according to claim 6, wherein the adjusting unit is specifically configured to adjust the size of the image displayed on the terminal screen according to a correspondence between the first difference and an image size scaling factor, which is a ratio of the standard face image size to the face image size, and a correspondence between the user's visual force value and the image size scaling factor; or adjusting the contrast and/or brightness of the image displayed on the terminal screen according to the corresponding relationship between the first difference and the variation of the contrast and/or brightness of the image and the corresponding relationship between the visual force value of the user and the variation of the contrast and/or brightness of the image.

8. The apparatus of claim 6, wherein the processing module further comprises: a comparison unit;

the obtaining unit is further configured to obtain a current distance between the face of the current user and the terminal lens according to a corresponding relationship between the first difference and a distance variation between the face and the terminal lens if the absolute value of the first difference is greater than a preset difference;

the comparison unit is used for comparing the habitual distance between the face of the user and the lens of the terminal with the current distance to obtain a second difference value;

the adjusting unit is specifically configured to adjust the image displayed on the screen of the terminal according to the second difference and the user's visual force value if the absolute value of the second difference is greater than a second preset difference.

9. The apparatus of claim 6, further comprising: a comparison module and a prompt module, wherein the comparison module is used for comparing the current value of the current value,

the comparison module is used for comparing the size of the face image with the size of a standard face image to obtain a first ratio;

the prompting module is used for sending first prompting information to the user if the first ratio is larger than a first preset ratio so as to prompt that the user is far away from the terminal lens currently; and if the first ratio is smaller than a second preset ratio, sending second prompt information to the user to prompt that the user is closer to the terminal lens currently.

10. The apparatus according to any one of claims 6-9, wherein: the acquisition module is further used for testing the eyesight of the user by receiving the input operation of the visual chart displayed on the screen of the terminal by the user, and acquiring the eyesight value of the user; or accepting the user's visual force value input by the user.

11. A terminal device, comprising: a vision protecting display device as claimed in any one of claims 6 to 10.