CN101033955B - A method, device and display for realizing vision protection - Google Patents

Abstract

The invention discloses a method, a device and a display for realizing vision protection, which are used to solve the problems in the prior art that the vision protection device has poor vision protection effect and the reminder information sent out is inaccurate. The method of the present invention is used to send reminder information to the user to keep a certain distance from the viewing object, and the method includes the following steps: A. Collect an image including both eyes of the user through an image acquisition device, and calculate the distance between the eyes of the user on the image. B. When the pixel distance is greater than or equal to a preset pixel distance threshold, a reminder message is sent to the user. The invention also discloses a device for realizing vision protection and a display. The invention is used to remind the user to keep a certain distance from the viewing object, so as to protect the user from damage to eyesight due to too close distance to the viewing object.

Description

A method, device and display for realizing vision protection

technical field

The invention relates to the field of electronic technology, in particular to a method, a device and a display for realizing vision protection.

Background technique

80% of people's information comes from eyes. With the popularity of computers and TVs, more and more people need to watch the monitor for a long time. If the distance from the monitor is too close, it will cause damage to vision. Therefore, more and more People are near-sighted due to watching the monitor at close range for a long time.

There are some devices for protecting eyesight in the prior art, including the methods of measuring the distance of objects in a mechanical way and using sensors such as infrared rays to measure the distance between objects.

The method of measuring the distance of objects mechanically requires people to wear some headgear-like devices, and the distance between people and books or displays is limited by the distance of the rod. These devices will make people feel uncomfortable and affect people's emotions when studying and working. Invasive and, moreover, limited distance measurement range.

The method of measuring the distance between objects by using a sensor generally uses a transmitting device to actively emit infrared rays or ultrasonic waves, etc., and uses a receiving device to receive infrared rays or ultrasonic waves reflected back from objects, by measuring the time for emitting infrared rays or ultrasonic waves and receiving infrared rays or ultrasonic waves However, the method of measuring the distance between objects with a sensor will cause great interference, whether it is a person in front of the sensor, or a book, chair, small animal, etc. If any object is in front of the sensor, the sensor will consider it as a person and measure the distance. When the distance is less than the allowable value, a reminder will be issued, resulting in an error prompt. A reminder will be issued. For example, for a vision protection device that measures the distance between a person and the display, when a person walks in front of the computer, the distance measuring device measures the distance between the person and the display, thereby sending out a wrong reminder message. In fact, at this time , People do not look at the monitor, no matter how close or how long they are away from the monitor, no reminder message should be sent.

To sum up, the eyesight protection device in the prior art has a poor eyesight protection effect, and the reminder information issued is inaccurate.

Contents of the invention

The invention provides a method and device for realizing vision protection, which are used to solve the problems in the prior art that the vision protection device has poor vision protection effect and the reminder information sent out is inaccurate.

A method for realizing vision protection provided by the present invention is used to send reminder information to the user to keep a certain distance from the viewing object. The method includes the following steps:

A. Collect an image including both eyes of the user through an image acquisition device, and calculate the pixel distance between the eyes on the image;

B. When the pixel distance is greater than or equal to a preset pixel distance threshold, a reminder message is sent to the user.

The pixel distance mentioned above is the pixel distance normalized according to the resolution.

When the pixel distance is greater than or equal to the pixel distance threshold, step B further includes the step of: calculating the duration of the pixel distance greater than or equal to the pixel distance threshold;

Then further, when the duration is greater than or equal to a preset time threshold, the reminder message is sent to the user.

The step of presetting the pixel distance threshold includes:

When there is a certain distance between the eyes of several users and the image acquisition device, respectively collect the binocular images of the plurality of users through the image acquisition device, and respectively calculate the pixel distance between the eyes on the binocular images of the several users , get several pixel distances;

The average value of the several pixel distances is used as the pixel distance threshold.

The step of presetting the pixel distance threshold includes:

When there is a certain distance between the user's eyes and the image acquisition device, the image of the user's eyes is collected by the image acquisition device, and the pixel distance between the eyes on the image is calculated, and the pixel distance is used as the The above pixel distance threshold.

A device for realizing vision protection provided by the present invention is used to send reminder information to the user to keep a certain distance from the viewing object. The device includes:

an information acquiring unit, configured to acquire an image including both eyes of the user, and calculate a pixel distance between the eyes on the image;

A reminder unit, configured to send a reminder message to the user when the pixel distance is greater than or equal to a pre-stored pixel distance threshold.

The information acquisition unit includes:

an acquisition unit, configured to acquire images including both eyes of the user;

The information unit is used to calculate the pixel distance between the two eyes on the image, where the pixel distance is the pixel distance normalized according to the resolution.

The reminder unit includes:

The first judging unit is used to trigger the sending reminder information unit when the pixel distance is greater than or equal to the pre-stored pixel distance threshold;

The reminder information sending unit is configured to send reminder information to the user when the trigger signal sent by the first judging unit is received.

The reminder unit also includes:

A second judging unit, configured to calculate a duration for which the pixel distance is greater than or equal to the pixel distance threshold when the pixel distance is greater than or equal to the pixel distance threshold, and when the duration is greater than or equal to a preset When the time threshold value is set, the sending reminder information unit is triggered;

Then, the sending reminder information unit is configured to send reminder information to the user when receiving the trigger signals sent by the first judging unit and the second judging unit.

The unit also includes:

A first setting unit, configured to provide at least one kind of reminder information to the user, and send the reminder information set by the user to the reminder unit;

Then, the reminding unit sends the reminding information set by the user to the user when the pixel distance is greater than or equal to a pre-stored pixel distance threshold.

The unit also includes:

The second setting unit is configured to save the time threshold value preset by the user, and send the time threshold value to the reminder unit.

A display provided by the present invention sends reminder information to the user to keep a certain distance from itself, and the display includes:

A vision protection device, configured to collect an image including both eyes of the user, and calculate the pixel distance between the two eyes on the image, and send a message to the user when the pixel distance is greater than or equal to a pre-stored pixel distance threshold reminder message.

The eye protection devices include:

An information acquisition unit, configured to collect an image including both eyes of the user, and calculate a pixel distance between the two eyes on the image, where the pixel distance is a pixel distance normalized according to the resolution;

A reminder unit, configured to send a reminder message to the user when the pixel distance is greater than or equal to a pre-stored pixel distance threshold.

The present invention is used to send reminder information to the user to keep a certain distance from the viewing object, collect an image including both eyes of the user through an image acquisition device, and calculate the pixel distance between the two eyes on the image, when the pixel distance is greater than or equal to the preset pixel distance threshold, a reminder message is sent to the user. Through this technical solution, when the user watches the viewing object such as a display or a book, the user is reminded to keep a certain distance from the viewing object, thereby achieving The purpose of vision protection, and the reminder information sent by this vision protection method is more accurate and more in line with user requirements.

Description of drawings

Fig. 1 is the schematic diagram of prior art convex lens imaging principle;

Fig. 2 is the structural representation of device embodiment of the present invention;

Fig. 3 is a schematic flow chart of a method for locating eye feature points in an embodiment of the device of the present invention;

FIG. 4 is a schematic structural diagram of a display embodiment of the present invention;

Fig. 5 is a schematic flow diagram of a method embodiment of the present invention;

Fig. 6 is a schematic flowchart of a method embodiment of the present invention.

Detailed ways

Embodiments of the present invention provide a method and device for realizing vision protection, which are used to remind the user to keep a certain distance from the viewing object, protect the user's vision, collect images including both eyes of the user through an image acquisition device, and calculate the The pixel distance between the two eyes on the image; when the pixel distance is greater than or equal to the preset pixel distance threshold, a reminder message is sent to the user. Through this technical solution, when the user watches a display or a book, etc. When viewing an object, the user is reminded to keep a certain distance from the viewing object, so as to achieve the purpose of vision protection, and the reminder information sent by this vision protection method is more accurate and more in line with user requirements.

即像的大小h和物距A成反比，则当焦距f不变，像距a不变，物的大小H近似不变时，便可以通过像的大小来判断物距大小，而数码相机，数码摄像机等其他图像采集设备的成像原理和摄像头相似，也存在相同的结论。Referring to Figure 1, taking camera imaging as an example, when the camera is in normal use, when the object distance is greater than twice the focal length 2f, an inverted real image will be formed. According to the principle of convex lens imaging, when the object distance is beyond 2f, H represents the size of the object, respectively. h represents the size of the image, A represents the object distance, and a represents the image distance, then according to the geometric relationship of light: F

That is, the size h of the image is inversely proportional to the object distance A. When the focal length f is constant, the image distance a is constant, and the size H of the object is approximately constant, the object distance can be judged by the size of the image. For digital cameras, The imaging principles of other image acquisition devices such as digital video cameras are similar to those of cameras, and the same conclusions also exist.

For a fixed image acquisition device (including camera, digital camera and video camera, etc.), according to the imaging principle, when the lens and focal length are fixed, the size of the formed image depends on the object distance and the size of the object, and when the photosensitive device When the area is fixed, the size of the image is represented by the pixel area occupied by the image, and the distance between two points on the image is represented by the number of pixels between the two points on the image.

The eye is one of the most fixed organs on the human body. If the lens and focal length of the image acquisition device and the size of the photosensitive device are preset, when the person faces the image acquisition device, if the distance between the eyes of different people is ignored It can be considered that the distance between the two eyes in the resulting image is only affected by the object distance of the human eye. Then, by collecting the pixel distance between the two eyes of the person in the image, the object distance between the human and the lens can be determined, and thus It can determine whether the distance from the human eye to the image acquisition device meets the user's requirements.

Therefore, if the number of pixels between the binocular images on the image plane can be measured, that is, the pixel distance, it can be determined whether the distance between the eyes and the image acquisition device is within the required range by judging the pixel distance between the binocular images. The distance between the image acquisition device and the user's eyes is equal to the distance between the viewing object and the user's eyes, and when the image acquisition device and the viewing object are facing the user's eyes, the device provided by the present invention can achieve protection The purpose of the user's vision.

How to implement the device embodiment and the method embodiment of the present invention will be respectively described below in conjunction with the accompanying drawings.

Referring to Fig. 2, the device embodiment of the present invention is used to send reminder information to the user to keep a certain distance from the viewing object, thereby protecting the user's eyesight, the device includes: an information acquisition unit 21, a reminder unit 22, a first setting unit 23 and a second setting unit 24;

The information acquisition unit 21 includes: an acquisition unit 211 and an information unit 212;

The reminder unit 22 includes: a first judgment unit 221, a second judgment unit 222 and a reminder information sending unit 223;

The information acquisition unit 21 is configured to acquire an image including both eyes of the user, and calculate a pixel distance between the eyes on the image;

Wherein, the collection unit 211 is configured to collect images including both eyes of the user;

The information unit 212 is configured to calculate the pixel distance between the two eyes on the image, where the pixel distance is normalized according to the resolution;

Wherein, the distance between the user's eyes and the acquisition unit 211 is equal to the distance between the user's eyes and the viewing object, that is, the viewing object and the device are facing the user's eyes at the same time, and are in contact with the user. The distance between the eyes of the users is equal, which can protect the user's eyesight.

After the information unit 212 automatically determines the position of the left and right eyes in the image and locates the position of the left and right eyes, the pixel distance between the imaging points of the left and right eyes on the image plane can be obtained by calculating the distance between two points on the image plane coordinates, that is, the The pixel distance between the images of the user's eyes is the distance between the coordinates of two points on the image;

For example, after the acquisition unit 211 has acquired the image containing the face, the information unit 212 locates the position of the eye feature points by the following method, referring to FIG. 3 , the method specifically includes the following steps:

S301. Obtain the position and size information of the face through face detection, and determine the left-eye search area and the right-eye search area by means of statistics;

That is, determine the range of possible positions of the left eye and the right eye in the image, and call each possible position a primary position;

S302. In the left-eye and right-eye search areas, respectively use a left-eye local feature detector and a right-eye local feature detector to discriminate all left-eye primary locations and right-eye primary locations, and generate The primary location determines a monocular similarity value;

The greater the similarity, the greater the possibility of the real eye position;

S303. From all the primary left-eye positions and right-eye primary positions, respectively select the top N positions with the largest similarity values as left-eye candidate positions and right-eye candidate positions, and match all left-eye and right-eye candidate positions. Form a binocular candidate pair, and determine the binocular area based on each candidate pair;

S304. Using a binocular region detector as a global constraint, discriminate each binocular region, and determine a binocular similarity value for each binocular candidate pair;

S305. Select the top M binocular candidate pairs with the largest binocular similarity, and calculate average values for all left-eye candidate positions and all right-eye candidate positions;

Use the average of all left eye candidate positions as the left eye feature point position;

The average of all right eye candidate positions is taken as the right eye feature point position.

The acquisition unit 211 in the embodiment of the present invention is a digital image acquisition device, and the acquired images are represented by a two-dimensional matrix. Every point on the image has a digitized coordinate (x, y). For example, for a 640×480 resolution image, the position of the coordinates (x, y) of a certain point satisfies:

{(x, y)|x>=0&&x<640, y>=0&&y<480};

Then, the pixel distance between the left eye and the right eye on the image can be calculated according to the distance between the position coordinates of the left eye feature point and the right eye feature point position coordinates.

In the process of digitizing the analog image obtained by the photosensitive device, assuming that the area of the photosensitive device is B*C and the resolution is W*D, then there is B/W=C/D, and the corresponding unit size of the analog image is The number of pixels of the digital image is B/W, if the number of pixels (pixel distance) between two points on the digital image is m, then the distance between the two points on the resulting analog image is h=m*B/W , it can be seen that the distance between two points on the analog image (real image) is proportional to the pixel distance of the two points on the digital image, so the pixel distance can be used to determine whether the distance between two points on the analog image is within a limited range, When the pixel distance is smaller than the pre-stored pixel distance threshold, it means that the distance between two points on the simulated image is within a limited range, that is to say, the actual object distance is safe.

For the same image acquisition device (such as a camera), the resolution of the output image can be set by software, for example, the resolution can be set to 640×480, or the resolution can be set to 320×240. For the same person and the same In the images collected by the image acquisition device at the same distance, although the collected images are of the same size, due to the different resolutions, the relationship between the distance h between the two eyes on the image and the pixel distance between the two eyes on the image is If the pixel distance is used to determine whether the distance between two points on the simulated image is within a limited range, it is necessary to set corresponding pixel distance thresholds for different resolutions.

Therefore, preferably, in order to avoid the influence of resolution in the embodiment of the present invention, the pixel distance is the pixel distance normalized according to the resolution, and the pixel distance threshold is also normalized according to the resolution pixel distance threshold;

The information unit 212 performs normalization processing on the calculated pixel distance according to the resolution, and the normalized pixel distance is the difference between the pixel distance between two points on the collected digital image and the resolution in the current horizontal direction. Ratio, or the ratio of the pixel distance between two points on the collected digital image to the current resolution in the vertical direction, for example, when the size A of the photosensitive device is constant, h is proportional to m/W. For the case where the resolution is 640×480, the resolution in the horizontal direction is 640, and for the case of 320×240, the resolution in the horizontal direction is 320;

In this way, the normalized pixel distance is used to determine whether the distance between two points on the simulated image is within a limited range, so that the same normalized pixel distance threshold can be used to process different resolutions, avoiding the need for Different resolutions require the cumbersome setting of corresponding pixel distance thresholds.

The reminder unit 22 is configured to when the pixel distance is greater than or equal to a pre-stored pixel distance threshold, and when the duration of the pixel distance greater than or equal to the pixel distance threshold is greater than or equal to a preset time When the threshold value is exceeded, a reminder message is sent to the user;

Wherein, the pre-stored pixel distance threshold can be preset in the following manner:

Method 1: Set a distance value, which is the safe distance value between the human eye and the viewing object, that is, when the human eye and the viewing object are greater than or equal to the distance value, it is considered safe and will not cause visual damage;

Fix the camera on the viewing object, and adjust the angle so that it just captures the face of the user in front of the viewing object; measure and count various types of people facing the image acquisition device and the distance from the viewing object is the set When the distance is , the pixel distance between the two eyes on the image collected by the image acquisition device;

The average value of the pixel distance between the two eyes on images corresponding to different people is used as the pixel distance threshold, and the threshold is pre-stored in the reminder unit 22 .

Method 2: Considering the differences in binocular distance between various people, especially the differences between men and women, and the differences between adults and children, the pre-stored thresholds are divided into three categories: adult male, adult female, and child , of course, there can be other classification methods as needed;

In practical applications, the device for realizing vision protection can provide users with type selection, and the user can select the pixel distance threshold corresponding to the adult male option, the pixel distance threshold corresponding to the adult female option, or the pixel distance corresponding to the child option according to the above classification. Threshold, so that the received reminder information is more accurate;

Method 3: In practical applications, according to the needs of the user, the user selects a certain distance, and when the user's eyes and the viewing object have the certain distance, the images of the user's eyes are collected through the fixed image acquisition device on the viewing object, And calculate the pixel distance between the two eyes on the image, and use the pixel distance as the pixel distance threshold;

Then, in actual application, the user can receive the reminder information sent by the reminder unit 22 according to the pixel distance threshold set by the user, which is more accurate.

The first setting unit 23 is configured to provide at least one kind of reminder information to the user, and send the reminder information set by the user to the reminder unit 22;

Then, the reminder information sent by the reminder unit 22 to the user is the reminder information set by the user, and the reminder information can be issued in any form such as output signal, sound, image prompt, or any combination of several forms. to issue a reminder message;

The second setting unit 24 is configured to save a time threshold (for example, 1 second) preset by the user, and send the time threshold to the reminder unit 22;

Wherein, the first judging unit 221 is configured to trigger the sending reminder information unit 223 when the pixel distance is greater than or equal to a pre-stored pixel distance threshold;

The second judging unit 222 is configured to calculate the duration for which the pixel distance is greater than or equal to the pixel distance threshold, and when the duration is greater than or equal to a preset time threshold, trigger the sending reminder information unit 223;

Then, the sending reminder information unit 223 is configured to send the reminder information set by the user to the user when receiving the trigger signal sent by the first judging unit 221 and the second judging unit 222 .

For example, when the viewing object is a display, it is assumed that it is necessary to design a vision protection device that will automatically send a reminder message to the user when the distance between the user's eyes and the display is less than 50 cm and lasts longer than 1 second;

In order to save costs, the acquisition unit 211, that is, the image acquisition device, can use a relatively cheap camera, fix the camera on the upper end of the display, and adjust the angle so that it just captures the face of the user in front of the display;

The collection unit 211 collects a face image when the user is viewing the display from the front and the distance between the user's eyes and the display is 50 cm, and calculates the pixel distance between the eyes in the image through the information unit 212, and uses the pixel distance as the pixel distance threshold d _T ;

In practical applications, the acquisition unit 211 collects images, and the information unit 212 locates the eyes in the image. If there are eyes in the image, the pixel distance between the eyes is calculated. The first judging unit 221 judges whether the pixel distance between the eyes is greater than or equal to the threshold d _T , when When the inter-eye pixel distance is greater than or equal to the pre-stored pixel distance threshold _dT , the second judging unit 222 calculates the duration t during which the inter-eye pixel distance is greater than or equal to the threshold _dT , if t is greater than or equal to the preset time When the threshold value t _T (may be 1 second), the sending reminder information unit 223 sends a reminder message to the user, reminding the user to stay away from the display.

At the same time, the embodiment of the present invention also provides a display, which has the function of protecting the eyesight of the user, as shown in FIG. 4 , the display includes: a vision protection device 41;

The eyesight protection device includes: an information acquisition unit 411 and a reminder unit 412;

The eyesight protection device 41 is configured to collect an image including both eyes of the user, and calculate a pixel distance between the two eyes on the image, and when the pixel distance is greater than or equal to a pre-stored pixel distance threshold, send the image to the user. The user sends a reminder message.

Wherein, the information acquisition unit 411 is configured to acquire an image including both eyes of the user, and calculate the pixel distance between the eyes on the image;

The reminder unit 412 is configured to send a reminder message to the user when the pixel distance is greater than or equal to a pre-stored pixel distance threshold;

Preferably, the pixel distance is a pixel distance normalized according to resolution; the pixel distance threshold is a pixel distance threshold normalized according to resolution.

Referring to Fig. 5, an embodiment of the method of the present invention is used to send reminder information to the user to keep a certain distance from the viewing object. The method includes steps:

S501. Collect an image including both eyes of the user through an image collection device, and calculate a pixel distance between the two eyes on the image;

S502. When the pixel distance is greater than or equal to a preset pixel distance threshold, send a reminder message to the user;

Among them, the pixel distance threshold can be preset by the following two methods:

Method 1: When there is a certain distance between the eyes of several users and the image acquisition device, respectively collect the binocular images of the plurality of users through the image acquisition device, and calculate the pixel distance between the eyes of the plurality of images respectively , to obtain the several pixel distances; the average value of the several pixel distances is used as the pixel distance threshold.

Method 2: When there is a certain distance between the user's eyes and the image acquisition device, the image acquisition device collects the image of the user's eyes, and calculates the pixel distance between the eyes on the image, and the pixel distance as the pixel distance threshold.

Referring to FIG. 6 , the embodiment of the method of the present invention is used to send reminder information to the user to keep a certain distance from the viewing object. The method includes steps:

S601. Collect images including both eyes of the user;

S602. Calculate the pixel distance between the two eyes on the image;

The pixel distance is the pixel distance normalized according to the resolution;

S603. When the pixel distance is greater than or equal to the preset pixel distance threshold, calculate the duration of the pixel distance greater than or equal to the pixel distance threshold, and when the duration is greater than or equal to the preset time gate When the limit value is exceeded, a reminder message is sent to the user;

The pixel distance threshold is a pixel distance threshold normalized according to the resolution.

In summary, through the technical solution provided by the present invention, the eye imaging distance is used to determine the actual object distance between the human eye and the viewing object, and the user is reminded to keep a certain distance from the display, so as to protect the user from being too far away from the viewing object. Nearly causing damage to eyesight; at the same time, the present invention avoids the wrong reminders caused by the interference of books, hands, and bodies in the prior art, and the present invention has strong anti-interference ability; The pixel distance threshold and time, therefore, bring convenience to the user's application, better meet the user's needs, and have strong scalability.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (13)

1. A method for realizing vision protection, characterized in that, it is used to send reminder information to the user to keep a certain distance from the viewing object, the method may further comprise the steps: A. Collect an image including both eyes of the user through an image acquisition device, and calculate the pixel distance between the eyes on the image; B. When the pixel distance is greater than or equal to a preset pixel distance threshold, a reminder message is sent to the user. 2. The method according to claim 1, wherein the pixel distance is a pixel distance normalized according to the resolution. 3. The method according to claim 1, wherein when the pixel distance is greater than or equal to the pixel distance threshold, step B further comprises the step of: calculating the pixel distance greater than or equal to the pixel distance threshold duration; Then further, when the duration is greater than or equal to a preset time threshold, the reminder message is sent to the user. 4. The method according to claim 1, wherein the step of presetting the pixel distance threshold comprises: When there is a certain distance between the eyes of several users and the image acquisition device, respectively collect the binocular images of the plurality of users through the image acquisition device, and respectively calculate the pixel distance between the eyes on the binocular images of the several users , get several pixel distances; The average value of the several pixel distances is used as the pixel distance threshold. 5. The method according to claim 1, wherein the step of presetting the pixel distance threshold comprises: When there is a certain distance between the user's eyes and the image acquisition device, the image of the user's eyes is collected by the image acquisition device, and the pixel distance between the eyes on the image is calculated, and the pixel distance is used as the The above pixel distance threshold. 6. A device for realizing vision protection, characterized in that the device is used to send reminder information to the user to keep a certain distance from the viewing object, and the device includes: an information acquiring unit, configured to acquire an image including both eyes of the user, and calculate a pixel distance between the eyes on the image; A reminder unit, configured to send a reminder message to the user when the pixel distance is greater than or equal to a pre-stored pixel distance threshold. 7. The device according to claim 6, wherein the information acquisition unit comprises: an acquisition unit, configured to acquire images including both eyes of the user; The information unit is used to calculate the pixel distance between the two eyes on the image, where the pixel distance is the pixel distance normalized according to the resolution. 8. The device according to claim 6, wherein the reminder unit comprises: The first judging unit is used to trigger the sending reminder information unit when the pixel distance is greater than or equal to the pre-stored pixel distance threshold; The reminder information sending unit is configured to send reminder information to the user when the trigger signal sent by the first judging unit is received. 9. The device according to claim 8, wherein the reminder unit further comprises: A second judging unit, configured to calculate a duration for which the pixel distance is greater than or equal to the pixel distance threshold when the pixel distance is greater than or equal to the pixel distance threshold, and when the duration is greater than or equal to a preset When the time threshold value is set, the sending reminder information unit is triggered; Then, the sending reminder information unit is configured to send reminder information to the user when receiving the trigger signals sent by the first judging unit and the second judging unit. 10. The device of claim 6, further comprising: A first setting unit, configured to provide at least one kind of reminder information to the user, and send the reminder information set by the user to the reminder unit; Then, the reminding unit sends the reminding information set by the user to the user when the pixel distance is greater than or equal to a pre-stored pixel distance threshold. 11. The device of claim 9, further comprising: The second setting unit is configured to save the time threshold value preset by the user, and send the time threshold value to the reminder unit. 12. A display, characterized in that the display sends a reminder message to the user to keep a certain distance from itself, and the display includes: A vision protection device, configured to collect an image including both eyes of the user, and calculate the pixel distance between the two eyes on the image, and send a message to the user when the pixel distance is greater than or equal to a pre-stored pixel distance threshold reminder message. 13. The display of claim 12, wherein the eye protection device comprises: An information acquisition unit, configured to collect an image including both eyes of the user, and calculate a pixel distance between the two eyes on the image, where the pixel distance is a pixel distance normalized according to the resolution; A reminder unit, configured to send a reminder message to the user when the pixel distance is greater than or equal to a pre-stored pixel distance threshold.

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