Eye protection device and control method therefor

Abstract

Provided are an eye protection device and a control method therefor. The eye protection device comprises a main control circuit module and an acquisition circuit module, and the main control circuit module comprises a microprocessor. The acquisition circuit module comprises a plurality of light intensity acquisition units, each light intensity acquisition unit comprises a first-type light intensity sensor and a polarizer, and the polarizer is arranged on a light incident side of the first-type light intensity sensor; the microprocessor comprises a determination and output unit, and the determination and output unit is configured to determine, on the basis of a plurality of light intensity values obtained by a plurality of first-type light intensity sensors, whether incident light is polarized light, and then determine the type of a material to be read; and the microprocessor is configured to output eye protection prompt information on the basis of the type of the material to be read. According to embodiments of the present invention, the first-type light intensity sensors having the polarizers are provided, so that polarized light and natural light can be distinguished, then whether the material to be read is a paper reading material can be determined, and therefore, a user can obtain prompt information beneficial to eyesight protection.

Description

Eye protection device and control method thereof

[0001] This application claims priority to Chinese Patent Application No. 202311101667.6 filed on August 29, 2023, and the contents of the above-mentioned Chinese patent application disclosure are hereby incorporated by reference in their entirety as a part of this application. Technical Field

[0002] At least one embodiment of the present disclosure relates to an eye protection device and a control method thereof. Background Art

[0003] In recent years, with the rapid development of science and technology, a wide range of electronic products have emerged. To better protect eyesight, some eye protection devices have features such as measuring the distance between the eye and the reading material, monitoring the duration and posture of eye use, and users can adjust their eyesight accordingly.

[0004] Summary of the Invention

[0005] At least one embodiment of the present disclosure provides an eye protection device and a control method thereof.

[0006] At least one embodiment of the present disclosure provides an eye protection device, including a main control circuit module and an acquisition circuit module, the main control circuit module including a microprocessor; the acquisition circuit module including multiple light intensity acquisition units, wherein the light intensity acquisition unit includes a first type of light intensity sensor and a polarizer, and the polarizer is arranged on the light incident side of the first type of light intensity sensor; the microprocessor includes a judgment and output unit, and the judgment and output unit is configured to judge whether the incident light is polarized light based on multiple light intensity values ​​obtained by the multiple first type of light intensity sensors, and then judge the type of the reading material; the microprocessor is configured to output eye protection prompt information according to the type of the reading material.

[0007] For example, in an eye protection device provided according to at least one embodiment of the present disclosure, a plurality of first-type light intensity sensors are respectively connected to the microprocessor, and the judgment and output unit is configured to determine the light intensity interval in which the plurality of light intensity values ​​obtained by the plurality of first-type light intensity sensors are located, and compare the maximum difference between the plurality of light intensity values ​​with the light intensity threshold of the light intensity interval, so that the microprocessor obtains eye environment information according to the comparison result and outputs eye protection prompt information accordingly.

[0008] For example, in an eye protection device provided according to at least one embodiment of the present disclosure, the light intensity interval includes a sum value interval, and the judgment and output unit is configured to determine the sum value interval corresponding to the sum value of multiple light intensity values ​​obtained by the multiple first-type light intensity sensors, and compare the maximum difference between the multiple light intensity values ​​with the light intensity threshold corresponding to the sum value interval, so that the microprocessor outputs eye protection prompt information based on the comparison result.

[0009] For example, in an eye protection device provided according to at least one embodiment of the present disclosure, the light intensity interval includes a percentage interval, and the judgment and output unit is configured to determine a difference percentage interval corresponding to the percentage of the difference between the maximum light intensity value and the minimum light intensity value among the multiple light intensity values ​​obtained by the multiple first-type light intensity sensors, and compare the maximum difference between the multiple light intensity values ​​with the light intensity threshold corresponding to the percentage interval, so that the microprocessor outputs eye protection prompt information based on the comparison result.

[0010] For example, in the eye protection device provided according to at least one embodiment of the present disclosure, the microprocessor is configured to output a prompt message indicating that the incident light comes from a non-paper reading material when the maximum difference between the multiple light intensity values ​​is greater than the light intensity threshold.

[0011] For example, in the eye protection device provided according to at least one embodiment of the present disclosure, the extension directions of the transmission axes of the plurality of polarizers are different.

[0012] For example, according to at least one embodiment of the present disclosure, an eye protection device is provided, wherein the multiple first-type light intensity sensors include a first light intensity sensor and a second light intensity sensor, and the light intensity signals respectively collected by the first light intensity sensor and the second light intensity sensor when corresponding to the eye protection device in the same posture are a group of light intensity collection signals, and the judgment and output unit is configured to make a judgment based on at least two groups of the light intensity collection signals, and when the judgment and output unit obtains that the incident light is polarized light based on at least one group of the light intensity collection signals, the microprocessor outputs a prompt information that the light intensity signal comes from a non-paper reading material, and the at least two groups of light intensity collection signals respectively correspond to the eye protection device in different postures.

[0013] For example, in the eye protection device provided according to at least one embodiment of the present disclosure, the extension directions of the light transmission axes of the two polarizers respectively located on the light incident sides of the first light intensity sensor and the second light intensity sensor are perpendicular to each other.

[0014] For example, an eye protection device is provided according to at least one embodiment of the present disclosure, wherein the number of the multiple first-type light intensity sensors is not less than 3, the extension directions of the light transmission axes of the multiple polarizers arranged on the light incident side of the multiple first-type light intensity sensors are parallel to the same plane, the plane is perpendicular to the light incident direction of the first-type light intensity sensors, and the extension directions of the light transmission axes of at least three of the polarizers are different.

[0015] For example, in the eye protection device provided according to at least one embodiment of the present disclosure, the angle between the extension directions of the light transmission axes of two adjacent polarizers is the same as the angle between the extension directions of the light transmission axes of another two adjacent polarizers.

[0016] For example, in the eye protection device provided according to at least one embodiment of the present disclosure, the microprocessor is also configured to calibrate the light intensity values ​​collected by the multiple first-type light intensity sensors during the calibration phase so that the initial light intensity values ​​corresponding to natural light of the multiple first-type light intensity sensors are basically equal.

[0017] For example, in the eye protection device provided according to at least one embodiment of the present disclosure, the microprocessor is also configured to fit the light intensity curves of the multiple first-type light intensity sensors during the calibration stage so that the light intensity curves of the multiple first-type light intensity sensors corresponding to natural light basically coincide.

[0018] For example, according to the eye protection device provided in at least one embodiment of the present disclosure, after the calibration stage and before using the eye protection device to determine the type of the reading material, the microprocessor is further configured to determine the light intensity range and light intensity threshold of the eye protection device.

[0019] For example, in an eye protection device provided according to at least one embodiment of the present disclosure, the plurality of first-type light intensity sensors are arranged at intervals, and the eye protection device further includes a blocking portion, which is located in the intervals between adjacent first-type light intensity sensors.

[0020] For example, according to the eye protection device provided by at least one embodiment of the present disclosure, the eye protection device also includes a second type of light intensity sensor, which is connected to the microprocessor and is configured to detect the intensity of ultraviolet rays.

[0021] For example, according to the eye protection device provided in at least one embodiment of the present disclosure, the eye protection device also includes: a ranging sensor, located in the acquisition circuit module and connected to the microprocessor, and the ranging sensor is configured to measure the distance between it and the reading material.

[0022] For example, according to the eye protection device provided by at least one embodiment of the present disclosure, the eye protection device also includes: a posture sensor located in the main control circuit module, the posture sensor is connected to the microprocessor and is configured to recognize user posture.

[0023] For example, according to the eye protection device provided in at least one embodiment of the present disclosure, the eye protection device also includes: a battery management unit, located in the acquisition circuit module, the battery management unit is configured to provide power to the main control circuit module and the acquisition circuit module, and detect the charging voltage and working voltage of the battery; a wireless transmission unit, connected to the microprocessor, configured to send and receive wireless data; and an alarm module, connected to the microprocessor, configured to issue an alarm prompt message.

[0024] For example, according to the eye protection device provided by at least one embodiment of the present disclosure, the number of the plurality of first-type light intensity sensors is one of 3, 4, 5, and 6.

[0025] For example, in the eye protection device provided by at least one embodiment of the present disclosure, the circuit structures of the multiple first-type light intensity sensors connected to the microprocessor are the same.

[0026] At least one embodiment of the present disclosure provides a method for controlling an eye protection device, comprising: collecting multiple light intensity values ​​through multiple first-type light intensity sensors, wherein a polarizer is provided on the light incident side of the first-type light intensity sensors; using a judgment and output unit in a microprocessor to judge whether the incident light is polarized light, and then judging the type of the reading object; and outputting eye protection prompt information corresponding to the type of the reading object through the microprocessor.

[0027] According to a control method for an eye protection device provided by at least one embodiment of the present disclosure, the method of using a judgment and output unit in a microprocessor to judge whether the incident light is polarized light and then judging the type of the reading material includes: determining the light intensity range in which the multiple light intensity values ​​obtained by the multiple first-type light intensity sensors are located, and comparing the maximum difference between the multiple light intensity values ​​with the light intensity threshold of the light intensity range, so that the microprocessor obtains eye environment information according to the comparison result and outputs eye protection prompt information accordingly.

[0028] According to a control method for an eye protection device provided by at least one embodiment of the present disclosure, the eye protection prompt information corresponding to the type of the reading material outputted by the microprocessor includes: when the maximum difference between the multiple light intensity values ​​is greater than the light intensity threshold of the light intensity interval, the microprocessor outputs prompt information that the light comes from a non-paper reading material.

[0029] According to a control method for an eye protection device provided in at least one embodiment of the present disclosure, before collecting multiple light intensity values ​​through multiple first-type light intensity sensors, the control method for the eye protection device also includes a calibration stage. In the calibration stage, the light intensity values ​​collected by the multiple first-type light intensity sensors are calibrated by a calibration unit so that the initial light intensity values ​​corresponding to natural light of the multiple first-type light intensity sensors are basically equal.

[0030] According to a control method for an eye protection device provided by at least one embodiment of the present disclosure, wherein, in the calibration stage, before collecting multiple light intensity values ​​by using multiple first-type light intensity sensors, the control method for the eye protection device also includes a fitting process, in which the light intensity curves of the multiple first-type light intensity sensors are fitted by the microprocessor so that the light intensity curves of the multiple first-type light intensity sensors corresponding to natural light basically coincide with each other.

[0031] According to the control method of the eye protection device provided by at least one embodiment of the present disclosure, after the calibration stage and before using the eye protection device to determine the type of the reading material, the control method also includes determining the light intensity range and light intensity threshold of the eye protection device, including: using the multiple first-type light intensity sensors to collect N groups of initial light intensity signals corresponding to natural light, N is a positive integer; calculating the sum of the initial light intensity values ​​corresponding to each group of initial light intensity signals; arranging the sum of the N groups of initial light intensity values ​​in sequence; dividing the light intensity interval according to the distribution of the N sums; and setting the difference between the maximum initial light intensity value and the minimum initial light intensity value in the same group of initial light intensity values ​​in each of the light intensity intervals as the light intensity threshold of the light intensity interval.

[0032] According to the control method of the eye protection device provided by at least one embodiment of the present disclosure, the determination of the light intensity interval and the light intensity threshold of the eye protection device also includes: calculating the difference percentage between the maximum initial light intensity value and the minimum initial light intensity value corresponding to each group of initial light intensity signals; arranging the difference percentages of multiple groups of the initial light intensity values ​​in sequence in the light intensity interval divided according to the distribution of N sum values; dividing the difference percentage interval according to the distribution of multiple groups of difference percentages in each of the light intensity intervals; and setting the difference between the maximum initial light intensity value and the minimum initial light intensity value in the same group of the initial light intensity values ​​within each of the difference percentage intervals as the light intensity threshold of the light intensity interval.

[0033] According to the control method of the eye protection device provided by at least one embodiment of the present disclosure, the control method also includes: using a distance measuring sensor to measure the distance between it and the reading material; using a posture sensor to identify the user's posture; and sending the corresponding distance information and posture information to the display component through the microprocessor. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, rather than limiting the present disclosure.

[0035] FIG1 is an overall schematic diagram of an eye protection device provided by at least one embodiment of the present disclosure.

[0036] FIG2 is a partial schematic diagram of an eye protection device provided by at least one embodiment of the present disclosure.

[0037] FIG3 is a distribution diagram of light intensity data collected during the calibration phase of the eye protection device provided by at least one embodiment of the present disclosure.

[0038] FIG4 is a schematic diagram of a partial structure of an eye protection device provided by at least one embodiment of the present disclosure.

[0039] FIG. 5 is a schematic diagram illustrating the extension direction of the light transmission axis of the polarizer of the eye protection device in FIG. 4 .

[0040] FIG6 is a schematic diagram of the partial structure of another eye protection device provided by at least one embodiment of the present disclosure.

[0041] FIG. 7 is a schematic diagram illustrating the extending direction of the light transmission axis of the polarizer of the eye protection device in FIG. 6 .

[0042] FIG8A is an overall schematic diagram of an eye protection device provided by at least one embodiment of the present disclosure.

[0043] FIG8B is a schematic diagram of the eye protection device provided by at least one embodiment of the present disclosure during testing.

[0044] FIG9 is a partial circuit diagram of a first type of light intensity sensor in at least one embodiment of the present disclosure.

[0045] FIG. 10 is a partial connection circuit diagram of a first type light intensity sensor and a microprocessor in at least one embodiment of the present disclosure.

[0046] FIG11 is a flow chart of a method for controlling an eye protection device according to at least one embodiment of the present disclosure.

[0047] FIG12 is a flow chart illustrating a method for controlling an eye protection device according to at least one embodiment of the present disclosure for determining a light intensity threshold. DETAILED DESCRIPTION

[0048] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0049] Unless otherwise defined, technical or scientific terms used in this disclosure should have the ordinary meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are simply used to distinguish different components. The words "include" or "comprising" and similar terms mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0050] The features "perpendicular," "parallel," and "identical" used in the embodiments of the present disclosure include the features "perpendicular," "parallel," and "identical" in the strict sense, as well as "approximately perpendicular," "approximately parallel," and "approximately identical" that include certain errors, taking into account the errors associated with the measurement of specific quantities (i.e., the limitations of the measurement system), and represent within the acceptable deviation range for the specific value determined by ordinary technicians in this field. The "center" in the embodiments of the present disclosure can include a position strictly at the geometric center and a position approximately at the center of a small area around the geometric center.

[0051] With the rapid development of technology, electronic devices such as computers, mobile phones, and tablets have become part of people's daily lives. It's inevitable that children and adolescents are exposed to these devices at an early age. Some surveys show that the incidence of myopia among adolescents is currently high, primarily due to improper reading habits and lighting environments that don't meet national standards.

[0052] The usual solution for children and adolescents with incorrect reading habits is to use assistive devices to force correction, but this approach is inconvenient. Subsequently, smart electronic devices have gradually emerged that can measure physical parameters such as distance and angle, providing users with reading posture tips.

[0053] However, the various eye protection devices currently available on the market struggle to effectively identify the type of reading material, meaning they are unable to accurately and efficiently distinguish whether a user is viewing an electronic device like a mobile phone or computer, or a paper book. Consequently, due to the different types of reading material, users' safe eye parameters vary. For example, the light intensity, duration of use, and distance of use for electronic screens and paper reading materials may differ.

[0054] Based on this, at least one embodiment of the present disclosure provides an eye protection device, which includes a main control circuit module and an acquisition circuit module. The main control circuit module includes a microprocessor; the acquisition circuit module includes multiple light intensity acquisition units, the light intensity acquisition unit includes a first type of light intensity sensor and a polarizer, the polarizer is arranged on the light incident side of the first type of light intensity sensor, the microprocessor includes a judgment and output unit, the judgment and output unit is configured to judge whether the incident light is polarized light based on multiple light intensity values ​​corresponding to multiple first type light intensity sensors, and then judge the type of the reading material. The microprocessor is configured to output eye protection prompt information according to the type of the reading material.

[0055] The eye protection device provided by at least one embodiment of the present disclosure, by setting a polarizing plate on the light incident side of each first type of light intensity sensor, can determine the type of the reading material based on the intensity of natural light after incidence and the intensity of polarized light after incidence, and then can output corresponding eye protection prompt information through the microprocessor, which is beneficial to reducing the user's visual fatigue and protecting the user's eyesight.

[0056] The eye protection device and control method thereof provided by the embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0057] FIG1 is an overall schematic diagram of an eye protection device provided by at least one embodiment of the present disclosure.

[0058] As shown in Figure 1, at least one embodiment of the present disclosure provides an eye protection device 01, which includes an acquisition circuit module 10 and a main control circuit module 20. For example, the acquisition circuit module 10 and the main control circuit module 20 are electrically connected to each other. The acquisition circuit module 10 includes a plurality of light intensity acquisition units 100. For example, the light intensity acquisition unit 100 may include a first type of light intensity sensor 101 and a polarizer (not shown in the figure), and the polarizer is arranged on the light incident side of the first type of light intensity sensor 101. For example, the acquisition circuit module 10 is installed at the transmitting end and the receiving end of the eye protection device 01, and the main control circuit module 20 is installed inside the eye protection device 01. For example, the acquisition circuit module 10 and the main control circuit module 20 can be connected by a flexible flat cable (FFC), but is not limited to this.

[0059] As shown in Figure 1, the main control circuit module 20 includes a microprocessor 21. The first type of light intensity sensor 101 can receive incident light and feed back the obtained light intensity to the microprocessor 21. The microprocessor 21 includes a judgment and output unit 211. The judgment and output unit 211 is configured to determine whether the incident light is polarized light based on the multiple light intensity values ​​obtained by the first type of light intensity sensor 101, and then determine the type of the reading material. The microprocessor 21 is configured to output eye protection prompt information based on the type of reading material. For example, the light intensity value obtained by the first type of light intensity sensor 101 refers to the light intensity value generated by the first type of light intensity sensor 101 based on the incident light collected.

[0060] For example, as shown in FIG1 , the incident light may refer to light incident from the object being read to the eye protection device 01. For example, when the object being read is a paper book, the incident light is natural light. For example, when the object being read comes from an electronic device that emits polarized light, such as a mobile phone or a computer, the incident light is polarized light. For example, a light intensity interval is provided in the judgment and output unit 211, and each light intensity interval corresponds to a light intensity threshold. The judgment and output unit 211 can determine the light intensity interval in which the light intensity values ​​obtained by the multiple first-type light intensity sensors 101 are located, and compare the light intensity value with the light intensity threshold corresponding to the light intensity interval, and then determine the type of incident light based on the comparison result.

[0061] For example, as shown in Figure 1, the microprocessor 21 can output corresponding eye protection prompts to the user based on the type of reading material. For example, the eye protection prompts may include information such as the distance between the human eye and the reading material, the user's reading posture, etc. Therefore, the user can make timely adjustments based on the eye protection prompts, which helps reduce the risk of visual fatigue, myopia, etc. For example, the microprocessor 21 can also provide the user with daily, weekly, and monthly reports, as well as behavioral warnings, etc., but is not limited to these.

[0062] As shown in Figure 1, the eye protection device 01 provided by at least one embodiment of the present disclosure, by setting a polarizer on the light incident side of each first type of light intensity sensor 101, can judge the type of the reading material according to the intensity of natural light and polarized light after incidence, and then output corresponding eye protection prompt information through the microprocessor 21, which is beneficial to reduce the user's visual fatigue and protect the user's eyesight. The system of the eye protection device has strong reliability and anti-interference ability.

[0063] For example, as shown in Figure 1, before the eye protection device 01 operates, the microprocessor 21 is configured to calibrate the eye protection device 01. Natural light has the same vibration intensity in all directions. Therefore, when natural light passes through the polarizer on the light-entry side of each first-type light intensity sensor 101, the light intensity is reduced to half of the incident light's intensity. Therefore, when the incident light is natural light, the light intensity values ​​received by the microprocessor 21 from the multiple first-type light intensity sensors 101 are substantially identical. The characteristics of polarized light indicate that the light intensity values ​​of polarized light after passing through the polarizers on the light-entry sides of the multiple first-type light intensity sensors 101 will not be exactly the same, thus distinguishing it from natural light. Based on this principle, during the calibration phase, the microprocessor 21 is also configured to calibrate the light intensity values ​​collected by the multiple first-type light intensity sensors 101 so that the initial light intensity values ​​corresponding to natural light are substantially equal, thereby ensuring a high degree of accuracy in the detection results of the multiple first-type light intensity sensors 101.

[0064] Figure 2 is a partial schematic diagram of the eye protection device provided by at least one embodiment of the present disclosure; Figure 3 is a distribution diagram of light intensity data collected by the eye protection device provided by at least one embodiment of the present disclosure during the calibration stage.

[0065] For example, as shown in FIG2 , an example is provided in which two first-type light intensity sensors 101 are provided in the eye protection device 01. For example, the multiple first-type light intensity sensors 101 may include a first light intensity sensor 1011 and a second light intensity sensor 1012, and the light intensity signals collected by the first light intensity sensor 1011 and the second light intensity sensor 1012 corresponding to the eye protection device 01 in the same posture are formed into a group of light intensity collection signals. For example, the same group of light intensity collection signals may be the light intensity signals collected by the first light intensity sensor 1011 and the second light intensity sensor 1012 at the same time, but the present invention is not limited thereto.

[0066] For example, as shown in Figures 2 and 3, during the calibration phase, natural light is used as the incident light, and 9 groups of initial light intensity values ​​are collected using the first light intensity sensor 1011 and the second light intensity sensor 1012. Of course, the number of initial light intensity values ​​is not limited to 9 groups. For example, more than 9 groups of initial light intensity values ​​can also be collected to improve the accuracy of the calibration. For example, a main control chip is provided in the microprocessor 21, and the initial light intensity values ​​collected by multiple groups of first-type light intensity sensors 101 can be recorded in the main control chip. The light intensity value curve N1 represents a light intensity value curve in which the light intensity values ​​collected by the first light intensity sensor 1011 are connected in sequence, the light intensity value curve N2 represents a light intensity value curve in which the light intensity values ​​collected by the second light intensity sensor 1012 are connected in sequence, and the light intensity value curve N3 represents a light intensity value curve in which the difference corresponding to each group of light intensity values ​​(for example, the difference between the light intensity value of the first light intensity sensor 1011 and the light intensity value of the second light intensity sensor 1012) is connected in sequence.

[0067] For example, as shown in Figures 1 to 3, the microprocessor 21 is also configured to fit the light intensity curves of multiple first-type light intensity sensors 101 during the calibration phase, so that the light intensity curves corresponding to natural light of the multiple first-type light intensity sensors 101 basically coincide with each other. For example, for the same set of light intensity value data, the microprocessor 21 can add the light intensity value in the light intensity value curve N2 to the light intensity value corresponding to the light intensity value curve N3, so that the light intensity value curve of the light intensity value of the second light intensity sensor 1012 after fitting basically coincides with the light intensity value curve N1. For example, a control program can be set in the main control chip of the microprocessor 21 to implement the above-mentioned fitting process, but is not limited thereto. Thus, when natural light is used as the incident light, the light intensity values ​​obtained by the calibrated multiple first-type light intensity sensors 101 are basically the same, so that the multiple first-type light intensity sensors 101 have a higher accuracy when collecting light intensity values.

[0068] Table 1 is a table of light intensity data collected by the eye protection device provided by at least one embodiment of the present disclosure during the stage of determining the light intensity threshold.

[0069] Table 1

[0070] For example, as shown in Figure 1, after completing the calibration of multiple first-type light intensity sensors 101 in the eye protection device 01, and before using the eye protection device 01 to determine the type of the reading material, the microprocessor 21 in the eye protection device 01 is also configured to determine the light intensity range and light intensity threshold of the eye protection device 01.

[0071] For example, as shown in Figures 1 and 2 and Table 1, the eye protection device 01 is provided with two first-type light intensity sensors for illustration. First, the first-type light intensity sensor 1011 and the first-type light intensity sensor 1012 are configured to respectively collect multiple sets of light intensity data. The microprocessor 21 can determine information such as the light intensity difference, difference percentage, and light intensity sum value in each set of light intensity data. For example, the light intensity interval can include a sum value interval. That is, based on the distribution of multiple sum values ​​of the multiple sets of light intensity values, multiple sets of light intensity data with relatively close light intensity sum distributions are divided into the same interval. For example, taking the light intensity intervals in Table 1 as an example, the light intensity sum value in the first light intensity interval 301 is 100-400, the light intensity sum value in the second light intensity interval 302 is 420-610, and the light intensity sum value in the third light intensity interval 303 is greater than 700. For example, the light intensity threshold value in a light intensity interval refers to the maximum difference in the light intensity values ​​within that interval. For example, the maximum difference in light intensity values ​​in the first light intensity interval 301 is 31, the maximum difference in light intensity values ​​in the second light intensity interval 302 is 13.75, and the maximum difference in light intensity values ​​in the third light intensity interval 303 is 14.75. The maximum difference in light intensity values ​​in each light intensity interval is the corresponding light intensity threshold.

[0072] Furthermore, as shown in FIG1 and Table 1, the light intensity interval can also include a percentage interval, that is, after dividing the interval according to the sum value distribution, the microprocessor 21 can further divide the difference percentage interval according to the distribution of the difference percentage of the multiple groups of light intensity values. For example, multiple groups of light intensity values ​​with similar difference percentage fluctuations can be placed in the same difference percentage interval within the same light intensity interval divided according to the sum value distribution, and the maximum difference in the light intensity values ​​corresponding to the difference percentage interval is used as the light intensity threshold. For example, within the first light intensity interval 301, the difference percentage fluctuations of the third to fifth groups of light intensity values ​​are similar, and the difference percentage intervals corresponding to the third to fifth groups of light intensity values ​​can be divided into the same difference percentage interval, and the maximum difference in the light intensity values ​​within the difference percentage interval, i.e., 31, is used as the light intensity threshold. For example, within the second light intensity interval 302, the percentage fluctuations in the difference between the sixth and seventh groups of light intensity values ​​are similar, both greater than 1%. Therefore, the percentage fluctuations in the difference between the sixth and seventh groups of light intensity values ​​can be divided into the same percentage fluctuation interval, and the maximum difference in the light intensity values ​​within this percentage fluctuation interval, i.e., 13.75, is used as the light intensity threshold. For example, the similarity in the percentage fluctuations in the difference between multiple groups of light intensity values ​​within the same light intensity interval applies only to that light intensity interval. By further dividing the percentage fluctuations based on the sum interval, the judgment and output unit can achieve more accurate results.

[0073] It should be noted that setting a difference percentage interval is not necessary. In some embodiments of the present disclosure, only the maximum difference between multiple light intensity values ​​of multiple first-type light intensity sensors 101 can be compared with the light intensity threshold corresponding to the sum value interval to determine the type of the object being read.

[0074] For example, as shown in Figure 1, multiple first-type light intensity sensors 101 are respectively connected to the microprocessor 21, and the judgment and output unit 211 is configured to determine the light intensity intervals in which multiple light intensity values ​​corresponding to the multiple first-type light intensity sensors 101 are located, and compare the maximum difference between the multiple light intensity values ​​with the light intensity threshold of the light intensity interval, so that the microprocessor 21 obtains eye environment information according to the comparison results and outputs eye protection prompt information accordingly.

[0075] For example, as shown in FIG1 and Table 1, after the judgment and output unit 211 determines the light intensity interval and the corresponding light intensity threshold of the eye protection device 01, in the judgment phase of the eye protection device 01, if the light intensity interval of the eye protection device 01 is a sum value interval, the judgment and output unit 211 can determine the light intensity interval based on the sum of the multiple light intensity values ​​obtained by the multiple first-type light intensity sensors 101, and compare the maximum difference between the multiple light intensity values ​​with the light intensity threshold corresponding to the light intensity interval. For example, the judgment and output unit 211 can determine the sum value interval (e.g., the first light intensity interval 301, the second light intensity interval 302, or the third light intensity interval 303) in which the sum of the multiple light intensity values ​​obtained by the multiple first-type light intensity sensors 101 falls, and then compare the difference between the maximum and minimum light intensity values ​​obtained by the multiple first-type light intensity sensors 101 with the light intensity threshold within the interval. For example, when the maximum difference between the multiple light intensity values ​​is greater than the light intensity threshold corresponding to the light intensity interval, the microprocessor 21 determines that the incident light is polarized light, thereby determining that the user is reading an e-book. For example, when the maximum difference between multiple light intensity values ​​is less than or equal to the light intensity threshold corresponding to the light intensity interval, the microprocessor 21 can obtain information that the incident light is natural light, thereby determining that the user is reading paper-based reading materials. The microprocessor 21 can output corresponding eye protection prompt information according to the type of reading material. For example, the eye protection prompt information may include viewing time, eye distance, eye environment, etc., so that the user can adjust the viewing status in a timely manner.

[0076] For example, in some embodiments of the present disclosure, as shown in FIG1 and Table 1, when the light intensity interval of the eye protection device 01 is a percentage interval, the judgment and output unit 211 can determine the percentage interval based on the percentage difference between the maximum light intensity value and the minimum light intensity value of the multiple light intensity values ​​corresponding to the multiple first-type light intensity sensors 101, and compare the maximum difference between the multiple light intensity values ​​with the light intensity threshold corresponding to the percentage interval, so that the microprocessor 21 outputs eye protection prompt information based on the comparison result. For example, when the maximum difference between the multiple light intensity values ​​is greater than the light intensity threshold corresponding to the light intensity interval, the microprocessor 21 obtains information that the incident light is polarized light, thereby determining that the user is reading an electronic book. For example, when the maximum difference between the multiple light intensity values ​​is less than or equal to the light intensity threshold corresponding to the light intensity interval, the microprocessor 21 can obtain information that the incident light is natural light, thereby determining that the user is reading a paper book. The microprocessor 21 can output corresponding eye protection prompt information based on the type of reading material, so that the user can adjust their viewing state in a timely manner.

[0077] FIG4 is a schematic diagram of a partial structure of an eye protection device provided by at least one embodiment of the present disclosure; FIG5 is a schematic diagram corresponding to the extension direction of the light transmission axis of the polarizer of the eye protection device in FIG4 .

[0078] For example, as shown in FIG1 , the light intensity collection unit 100 may include a first type light intensity sensor 101 , and the polarizers on the light incident side of the multiple first type light intensity sensors 101 have different extension directions of the light transmission axes to facilitate the distinction between natural light and polarized light.

[0079] For example, as shown in Figures 1, 2, and 4, the number of first-type light intensity sensors 101 in the light intensity collection unit 100 can be two. The multiple first-type light intensity sensors 101 can include a first light intensity sensor 1011 and a second light intensity sensor 1012. The light intensity signals collected by the first light intensity sensor 1011 and the second light intensity sensor 1012 when corresponding to the eye protection device 01 in the same posture are a group of light intensity collection signals. The judgment and output unit 211 is configured to make a judgment based on at least two groups of light intensity collection signals, and when the judgment and output unit 211 determines that the incident light is polarized light based on at least one group of light intensity collection signals, the microprocessor outputs a prompt message indicating that the light intensity signal comes from a non-paper reading material. The at least two groups of light intensity collection signals correspond to eye protection devices 01 in different postures.

[0080] Specifically, when the incident light is natural light, the light intensity values ​​collected by the first light intensity sensor 1011 and the second light intensity sensor 1012 are substantially equal, and both are half of the incident light. For example, when the incident light is polarized light, the light intensity value of the incident light after passing through the deflection plate satisfies the following formula: L = (L0) × (cos 2 μ)

[0081] Where L is the light intensity after passing through the polarizer, L0 is the initial light intensity, and μ is the angle between the incident light and the transmission axis of the polarizer.

[0082] For example, as shown in Figures 4 and 5, the angle between the polarization direction of the polarized light and the transmission axis of the polarizer 1011A on the light incident side of the first light intensity sensor 1011 can be μ1, and the angle between the polarization direction of the polarized light and the transmission axis of the polarizer 1012A on the light incident side of the second light intensity sensor 1012 can be μ2. Only when the polarization direction of the polarized light is equal to the angles of the transmission axes of the polarizers 1011A and 1012A, that is, μ1 = μ2, will the light intensity values ​​obtained by the first light intensity sensor 1011 and the second light intensity sensor 1012 be equal. In this case, the angle bisector of the transmission axes of the polarizers 1011A and 1012A is the same as the polarization direction of the polarized light, and the determination and output unit 211 can determine that the incident light is polarized light. For example, when the eye protection device 01 changes its posture, that is, when μ1 and μ2 are not equal, the light intensity values ​​obtained by the first light intensity sensor 1011 and the second light intensity sensor 1012 are not equal.

[0083] Therefore, as shown in Figures 1 and 4, when the number of the first type of light intensity sensors 101 in the light intensity collection unit 100 is 2, it is necessary to use at least two eye protection devices 01 in different postures to detect the light intensity, and when the light intensity values ​​obtained by at least one group of the first light intensity sensor 1011 and the second light intensity sensor 1012 are different, the microprocessor 21 will output a prompt message that the light intensity signal comes from a non-paper reading material. This setting can make the output signal of the microprocessor 21 more accurate, thereby improving the user experience.

[0084] For example, as shown in Figures 1, 4, and 5, when the number of the first type of light intensity sensors 101 in the light intensity collection unit 100 is 2, the extension direction of the light transmission axis of the polarizer 1011A located on the light incident side of the first light intensity sensor 1011 is P1, and the extension direction of the light transmission axis of the polarizer 1012A located on the light incident side of the second light intensity sensor 1012 is P2, and the extension direction P1 and the extension direction P2 are perpendicular to each other to facilitate design and assembly, but are not limited thereto. For example, in some embodiments of the present disclosure, the angle between the extension direction P1 and the extension direction P2 may not be 90°, for example, it may be at least one of 70° to 85°, 70° to 80°, and 75° to 88°, so that the light intensity collection unit 100 has a flexible design form, which can be set specifically according to design requirements.

[0085] For example, the light intensity sensor shown in FIG4 is provided with two first-type light intensity sensors 101 , which can save space and help make the light intensity sensor compact, lightweight, and easy to wear.

[0086] FIG6 is a schematic diagram of a partial structure of another eye protection device provided by at least one embodiment of the present disclosure; FIG7 is a schematic diagram of the extension direction of the light transmission axis of the polarizer corresponding to the eye protection device in FIG6 .

[0087] For example, in some embodiments, three or more first-type light intensity sensors 101 may be provided in the eye protection device to improve the judgment capability of the eye protection device and to simplify the control process.

[0088] For example, as shown in Figures 6 and 7, the eye protection device may include a third light intensity sensor 1013, a fourth light intensity sensor 1014, and a fifth light intensity sensor 1015. The transmission axis of the polarizer 1013A disposed on the light incident side of the third light intensity sensor 1013 extends in a direction P3, the transmission axis of the polarizer 1014A disposed on the light incident side of the fourth light intensity sensor 1014 extends in a direction P4, and the transmission axis of the polarizer 1015A disposed on the light incident side of the fifth light intensity sensor 1015 extends in a direction P5. As shown in Figure 7, the extension directions P3, P4, and P5 are different and are all parallel to the same plane, which is perpendicular to the light incident direction of the multiple first-type light intensity sensors 101.

[0089] For example, as shown in Figures 6 and 7, with this configuration, when the incident light is natural light, the light intensity values ​​obtained by the third light intensity sensor 1013, the fourth light intensity sensor 1014, and the fifth light intensity sensor 1015 are substantially equal, so that the maximum difference within the same group of light intensity values ​​is less than the corresponding light intensity threshold. When the incident light is polarized light, since the polarization direction of the polarized light cannot be simultaneously equal to extension direction P3, extension direction P4, and extension direction P5, the light intensity values ​​obtained by the third light intensity sensor 1013, the fourth light intensity sensor 1014, and the fifth light intensity sensor 1015 are unequal, so that the maximum difference within the same group of light intensity values ​​is greater than the corresponding light intensity threshold. Therefore, for a light intensity sensor equipped with three first-type light intensity sensors 101, the type of incident light can be identified by detecting only one group of light intensity values, thereby effectively improving detection efficiency.

[0090] For example, as shown in FIG7 , the angle between the extension directions of the transmission axes of two adjacent polarizers is the same as the angle between the extension directions of the transmission axes of the other two adjacent polarizers, that is, the angle between the extension direction P3 and the extension direction P4, the angle between the extension direction P4 and the extension direction P5, and the angle between the extension direction P3 and the extension direction P5 are equal to each other and are all 120°. This arrangement is conducive to making the arrangement of the third light intensity sensor 1013, the fourth light intensity sensor 1014, and the fifth light intensity sensor 1015 symmetrical, so as to simplify the design process. However, the embodiments of the present disclosure are not limited to this. For example, the angle between the extension direction P3 and the extension direction P4, the angle between the extension direction P4 and the extension direction P5, and the angle between the extension direction P3 and the extension direction P5 may not be completely equal, and can be set specifically according to design requirements.

[0091] For example, in some embodiments of the present disclosure, the number of first-type light intensity sensors 101 in the eye protection device can also be one of 3, 4, 5, and 6, allowing the eye protection device to have a more flexible design. When the number of first-type light intensity sensors in the eye protection device is greater than 3, the polarization directions of the polarizers disposed on the light-entering side of each first-type light intensity sensor are different, and each extension direction is parallel to the same plane, which is perpendicular to the light-entering direction of the multiple first-type light intensity sensors 101. When the incident light is natural light, the light intensity values ​​of the multiple first-type light intensity sensors 101 are substantially equal, so that the maximum difference in the same group of light intensity values ​​is less than the corresponding light intensity threshold. When the incident light is polarized light, because the polarization direction of the polarized light cannot simultaneously coincide with the extension direction of the transmission axis of the polarizer on the light-entering side of each first-type light intensity sensor, the light intensity values ​​obtained by the multiple first-type light intensity sensors are unequal, resulting in the maximum difference in the same group of light intensity values ​​being greater than the corresponding light intensity threshold, so that the judgment and output unit can judge the incident light as polarized light.

[0092] For example, as shown in Figures 4 and 6, multiple first-type light intensity sensors 101 are arranged at intervals, and the eye protection device 01 also includes a barrier portion 111, which is located in the intervals between adjacent first-type light intensity sensors 101. For example, as shown in Figure 4, the eye protection device includes an end cap 110A, and the end cap 110A includes multiple hollow portions, and the polarizer 1011A and the polarizer 1012A can be respectively arranged in the hollow portions. For example, the portion of the end cap 110A located between two adjacent hollow portions can serve as the barrier portion 111. For example, as shown in Figure 6, the eye protection device includes an end cap 110B, and the end cap 110B includes multiple hollow portions, and the polarizer 1013A, the polarizer 1014A, and the polarizer 1015A can be respectively arranged in the hollow portions. For example, the portion of the end cap 110B located between two adjacent hollow portions can serve as the barrier portion 111. The provision of the blocking portion 111 can reduce the risk of light crosstalk, so that the first type light intensity sensor 101 can accurately detect the type of light.

[0093] FIG8A is an overall schematic diagram of an eye protection device provided by at least one embodiment of the present disclosure.

[0094] For example, Figure 2 can be a front view when observed from the X direction shown in Figure 8A. For example, the eye protection device can also include a second type of light intensity sensor 102, which is connected to the microprocessor 21 (see Figure 1) and is configured to detect the intensity of ultraviolet rays. For example, the second type of light intensity sensor 102 can detect the intensity of ultraviolet rays and transmit the ultraviolet intensity information to the microprocessor 21. The microprocessor 21 can output eye protection prompt information about the intensity of ultraviolet rays to the user to reduce the risk of damage to the user's eyes and the risk of causing disease due to excessive ultraviolet intensity. For example, the model of the second type of light intensity sensor 102 in the eye protection device can be LTR-390UV ultraviolet sensor, but is not limited to this.

[0095] FIG8B shows a schematic diagram of the eye protection device provided by at least one embodiment of the present disclosure during detection. The polarizer 1001 is located on the side of the first type light intensity sensor 101 close to the object to be read 210, and the first type light intensity sensor 101 is connected to the microprocessor 21. For example, the first type light intensity sensor 101 can be connected to the main control chip of the microprocessor 21, but is not limited thereto. For example, the battery management unit 214 is respectively connected to the microprocessor 21 and the first type light intensity sensor 101 to provide a stable voltage signal. For example, light from the surface of the object to be read 210 can irradiate the polarizer 1001 of the eye protection device, thereby allowing the first type light intensity sensor 101 to obtain a corresponding light intensity value, so as to determine the type of the object to be read through the judgment and output unit in the microprocessor 21. For the judgment process of the judgment and output module, please refer to the relevant description of the aforementioned embodiment, which will not be repeated here.

[0096] For example, as shown in Figures 1 and 2, the eye protection device 01 also includes a distance sensor 103, which is located in the acquisition circuit module 10 and connected to the microprocessor 21. For example, the distance sensor 103 is configured to measure the distance between it and the object being read, such as the vertical distance between the user's eyes and a mobile phone, computer, or book, but is not limited to this. For example, the distance sensor 103 can be a time-of-flight distance sensor. For example, the principle of the distance sensor 103 can be to measure the time difference between light emitted from an object (e.g., the object being read) and then reflected and returned to the distance sensor. The product of this time difference and the speed of light is divided by 2 to obtain the distance between the distance sensor 103 and the measured object. For example, the distance sensor 103 can be electrically connected to the microprocessor 21 via an IIC (Inter-Integrated Circuit) bus to transmit distance data. For example, the model of the distance sensor 103 in the eye protection device 01 can be a VL6180 distance sensor, but is not limited to this.

[0097] For example, as shown in FIG1 , the eye protection device 01 may further include a wireless transmission unit 213 and a display component connected to the microprocessor. The wireless transmission unit 213 is configured to send and receive wireless data. For example, the wireless transmission unit 213 may include a Bluetooth wireless transmission component, and the display component may include a host computer (e.g., a WeChat applet on a mobile phone). The microprocessor 21 may transmit the distance data to the display component via the Bluetooth wireless transmission component for the user's reference and timely adjustment of the eye distance.

[0098] For example, as shown in Figure 1, the eye protection device 01 also includes a posture sensor 212, which is located in the main control circuit module 20 and is connected to the microprocessor 21. For example, the posture sensor 212 is configured to recognize the user's posture. For example, the posture sensor 212 can recognize the user's sitting, lying, or other postures, and assist in judging the sleep data. For example, the posture sensor 212 may include a motion sensor such as a three-axis accelerometer, and obtain data such as three-dimensional posture and orientation through its internal processor. For example, the posture sensor 212 can be electrically connected to the microprocessor 21 via IIC and transmit posture data. For example, the microprocessor 21 can transmit the posture data to the display component via the wireless transmission unit 213 for the user's reference and timely adjustment of the reading posture.

[0099] For example, as shown in Figure 1, the eye protection device 01 also includes a battery management unit 214, which is located in the main control circuit module 20. The battery management unit 214 is configured to provide power to the main control circuit module 20 and the acquisition circuit module 10, as well as detect the battery's charging voltage and operating voltage. For example, the charging voltage of the battery in the eye protection device 01 can be 4.2V to 4.5V. For example, the operating voltage of the battery can be 3.7V to 4V, but is not limited to this. For example, the battery management unit 214 can include functions for managing the eye protection device's charging and discharging modes, setting reasonable charging and discharging times, and controlling the effective use time of the eye protection device. For example, the battery management unit 214 can be equipped with a battery charging and discharging chip to control the charging current within a reasonable range. For example, the charging current can be 15mA to 18mA, but is not limited to this. For example, the charging voltage, operating voltage, and charging current information detected by the battery management unit 214 are not transmitted to the host computer via the wireless transmission unit 213, but are instead stored in the battery charging and discharging chip for battery management.

[0100] For example, as shown in FIG1 , the eye protection device 01 further includes an alarm module 215 , which is located in the main control circuit module 20 and is configured to issue an alarm. For example, the alarm module 215 may be a buzzer, but is not limited thereto. For example, the alarm module 215 may be electrically connected to the microprocessor 21 and, under the control of the microprocessor 21, issue an alarm. For example, a user may adjust their distance from the material being read and their reading posture in a timely manner based on the alarm sound emitted by the alarm module 215, but is not limited thereto.

[0101] For example, as shown in FIG2 , the microprocessor 21 can set the type of the reading object fed back by the multiple first-type light intensity sensors 101, the distance between the distance sensor 103 and the reading object, and the user's posture information detected by the posture sensor 212 in the same data packet, and send it to the display component through the wireless transmission unit 213, so that the user can make timely adjustments to reduce the risk of myopia caused by improper or excessive use of the eyes, thereby protecting children's eyesight more safely and efficiently. At the same time, the eye protection device provided by the embodiment of the present disclosure has high real-time performance, can correctly identify the user's eye behavior, and meet the usage requirements of the user scenario, and can realize the automatic detection of the distance, light intensity, and ultraviolet comprehensive system, indoor and outdoor detection, and automatic alarm and reminder functions.

[0102] For example, in some embodiments of the present disclosure, a timer is further provided in the eye protection device. After determining the type of reading material, the eye protection device can control the user's optimal one-time use time through the timer. For example, the optimal one-time use time can be set according to the intensity of the incident light and the intensity of the ambient light. For example, the optimal one-time use time for electronic devices and paper reading materials may be different. For example, the light intensity indoors and outdoors is different, and the optimal one-time use time will therefore be different. When the user exceeds the optimal one-time use time corresponding to the type of reading material, the timer can remind the user to take a break and control the reasonable outdoor activity time to reduce the risk of excessive eye use by the user.

[0103] Figure 9 is a partial circuit diagram of the first type of light intensity sensor in at least one embodiment of the present disclosure; Figure 10 is a partial connection circuit diagram of the first type of light intensity sensor and the microprocessor in at least one embodiment of the present disclosure.

[0104] For example, in some embodiments of the present disclosure, the circuit connection structures of each first-type light intensity sensor in the eye protection device can be identical, so that each first-type light intensity sensor can detect substantially the same intensity value for natural light. For example, as shown in Figure 9, the partial circuit of the eye protection device can be located on the detection current board of the first-type light intensity sensor, but is not limited to this. This partial circuit includes a first input terminal 401, a resistor 402, a capacitor 403, a second input terminal 404, a first output terminal 405, a second output terminal 406, a third output terminal 407, and a fourth output terminal 408. For example, the first output terminal 404 is connected to the battery management unit to receive an input voltage from the battery management unit. For example, the input voltage can be 1.8V, but is not limited to this. For example, the resistor 402 and capacitor 403 can act as filters to ensure more stable signal transmission within the circuit. For example, the resistance value of the resistor 402 can be 22 ohms, and the capacitor 403 can be 1 μF, with an accuracy of 10%, and a withstand voltage of 10V, but is not limited to this. For example, the first type of light intensity sensor 101 receives an input signal through the second input terminal 404, and the first output terminal 404 can be used as a ground terminal, but is not limited to this. For example, the first type of light intensity sensor 101 can feedback status information to the microcontroller through the second output terminal 406. For example, when the first type of light intensity sensor 101 collects a light intensity signal, the first type of light intensity sensor 101 feedbacks a high-level signal of the status information through the second output terminal 406, so that the microcontroller can perform a light intensity value reading operation. For example, after the microcontroller completes the reading operation, the first type of light intensity sensor 101 feedbacks a low-level signal of the status information through the second output terminal 406. For example, the third output terminal 407 is configured to transmit a data signal, for example, the output terminal can provide a data signal. The fourth output terminal 408 is configured to output a level signal corresponding to the data signal, for example, the output terminal can provide a clock signal.

[0105] For example, as shown in Figures 9 and 10, the microprocessor includes a first receiving terminal 501, a second receiving terminal 502, a third receiving terminal 503, a fourth receiving terminal 504, a first output terminal 505, and a second output terminal 506. For example, the first receiving terminal 501 and the second receiving terminal 502 can receive an input voltage from the battery management unit. For example, the input voltage can be 1.8V, but is not limited to this. For example, the microprocessor is also provided with a first resistor 509 and a second resistor 510 to stabilize the signal. For example, the third receiving terminal 503 of the microprocessor can be connected to the third output terminal 407 of the first type light intensity sensor 101, and the fourth receiving terminal 504 of the microprocessor can be connected to the fourth output terminal 408 of the first type light intensity sensor 101. For example, the microprocessor also includes a first transistor 507 and a second transistor 508. For example, when the signal received by the third receiving terminal 503 of the microprocessor is at a high level, the first transistor 507 is not turned on, and the first output terminal 505 of the microprocessor outputs a signal corresponding to the high level; otherwise, the first output terminal 505 of the microprocessor outputs a signal corresponding to a low level, thereby realizing the conversion between high and low levels.

[0106] FIG11 is a flow chart of a method for controlling an eye protection device according to at least one embodiment of the present disclosure.

[0107] As shown in FIG11 , at least one embodiment of the present disclosure further provides a method for controlling an eye protection device, comprising the following steps:

[0108] S101: collecting multiple light intensity values ​​using multiple first-type light intensity sensors, where a polarizer is provided on a light incident side of the first-type light intensity sensors;

[0109] S102: Using the determination and output unit in the microprocessor to determine whether the incident light is polarized light, and then determining the type of the object being read;

[0110] S103: Outputting eye protection prompt information corresponding to the type of the reading material through the microprocessor.

[0111] For example, as shown in FIG1 , the eye protection device 01 may include a first type light intensity sensor 101 and a microprocessor 21 , wherein the first type light intensity sensor 101 is connected to the microprocessor 21 . Multiple light intensity values ​​collected by multiple first type light intensity sensors may be sent to the microprocessor 21 .

[0112] For example, as shown in FIG1 , a polarizing plate is provided on the light incident side of the first type of light intensity sensor, and the microprocessor 21 has a judgment and output unit to judge the type of the object being read based on multiple light intensity values ​​from the first type of light intensity sensor 101. For example, when the judgment and output unit determines that the object being read comes from natural light based on multiple light intensity values, the type of the object being read can be determined to be a paper book; when the judgment and output unit determines that the object being read comes from polarized light based on multiple light intensity values, the type of the object being read can be determined to be an electronic device that emits polarized light, such as a mobile phone, a computer, etc. At this time, the microprocessor can output corresponding eye protection prompt information to the user accordingly. For example, the eye protection prompt information output by the microprocessor may include not only the type of the object being read, but also relevant information such as the user's posture and eye distance, which is not limited in the embodiments of the present disclosure.

[0113] The control method of the eye protection device provided by at least one embodiment of the present disclosure can identify the type of incident light based on the light intensity value of the incident light of the first type of light intensity sensor 101, and then can determine whether the reading material is a paper book or an electronic device that emits polarized light. At the same time, the corresponding eye protection prompt information is output through the microprocessor, which is conducive to reducing the user's visual fatigue and protecting the user's eyesight.

[0114] For example, before step S101, the control method of the eye protection device 01 further includes a calibration phase. During the calibration phase, a calibration unit calibrates the light intensity values ​​collected by the multiple first-type light intensity sensors 101 so that the initial light intensity values ​​corresponding to natural light by the multiple first-type light intensity sensors 101 are substantially equal, thereby ensuring that the detection results of the multiple first-type light intensity sensors 101 have a high degree of accuracy. For example, the calibration unit may be located in a main control chip within a microprocessor, but is not limited thereto.

[0115] For example, as shown in FIG2 , an example is provided in which two first-type light intensity sensors 101 are provided in the eye protection device 01. For example, the plurality of first-type light intensity sensors 101 may include a first light intensity sensor 1011 and a second light intensity sensor 1012, and the light intensity signals collected by the first light intensity sensor 1011 and the second light intensity sensor 1012 corresponding to the eye protection device 01 in the same posture constitute a group of light intensity collection signals. For example, the same group of light intensity collection signals may also be the light intensity signals collected by the first light intensity sensor 1011 and the second light intensity sensor 1012 at the same moment, but the present invention is not limited thereto.

[0116] For example, as shown in Table 3, during the calibration phase, natural light is used as the incident light, and 9 groups of initial light intensity values ​​are collected using the first light intensity sensor 1011 and the second light intensity sensor 1012, but the present invention is not limited thereto. For example, the initial light intensity values ​​collected by the first type of light intensity sensor 101 can be recorded in the main control chip, and the microprocessor 21 can sequentially generate a light intensity value curve N1 in which the light intensity values ​​collected by the first light intensity sensor 1011 are sequentially connected, a light intensity value curve N2 in which the light intensity values ​​collected by the second light intensity sensor 1012 are sequentially connected, and a light intensity value curve N3 in which the difference values ​​corresponding to each group of light intensity values ​​(for example, the difference between the light intensity value of the first light intensity sensor 1011 and the light intensity value of the second light intensity sensor 1012) are sequentially connected.

[0117] Then, the control method of the eye protection device also includes a fitting process. During the fitting process, the microprocessor can fit the light intensity curves of multiple first-type light intensity sensors so that the light intensity curves corresponding to natural light of the multiple first-type light intensity sensors basically overlap. For example, for the same set of light intensity value data, the microprocessor 21 can add the light intensity value in the light intensity value curve N2 and the light intensity value corresponding to the light intensity value curve N3, so that the light intensity value curve of the light intensity value of the second light intensity sensor 1012 after fitting basically overlaps with the light intensity value curve N1. For example, a control program can be set in the main control chip of the microprocessor 21 to implement the above-mentioned fitting process, but is not limited to this.

[0118] Therefore, when natural light is used as incident light, the light intensity values ​​obtained by the calibrated plurality of first-type light intensity sensors 101 are substantially the same, so that the plurality of first-type light intensity sensors 101 have higher accuracy when collecting light intensity values.

[0119] FIG12 is a flow chart illustrating a method for controlling an eye protection device according to at least one embodiment of the present disclosure for determining a light intensity threshold.

[0120] For example, as shown in FIG12 , after the calibration phase and before the eye protection device is used to determine the type of incident light, the microprocessor needs to determine the light intensity range and light intensity threshold for subsequent determination of the type of reading material, specifically including the following steps:

[0121] S201: using a plurality of first-type light intensity sensors 101 to collect N groups of initial light intensity signals corresponding to natural light, where N is a positive integer;

[0122] S202: Calculating the sum of the initial light intensity values ​​corresponding to each group of initial light intensity signals;

[0123] S203: Arrange the sum of N groups of initial light intensity values ​​in sequence;

[0124] S204: Dividing the light intensity intervals according to the distribution of the N sum values; and

[0125] S205: setting the difference between the maximum initial light intensity value and the minimum initial light intensity value in the same group of initial light intensity values ​​in each light intensity interval as the light intensity threshold of the light intensity interval.

[0126] For example, as shown in Table 1, the eye protection device 01 is provided with two first-type light intensity sensors for illustration. For example, with natural light as incident light, 10 groups of light intensity data are collected by the first-type light intensity sensor 1011 and the first-type light intensity sensor 1012. The sum of the initial light intensity, the light intensity difference, the difference percentage and other information in each group of light intensity data are determined by the judgment and output unit. For example, the light intensity interval may include a sum value interval, that is, an interval divided according to the distribution of multiple sum values ​​of multiple groups of light intensity values, but is not limited thereto. For example, the light intensity threshold within the light intensity interval refers to the difference between the maximum light intensity value and the minimum light intensity value within the interval.

[0127] For example, as shown in Table 1, the sum values ​​of 10 groups of initial light intensity values ​​are arranged in order based on the distribution of the multiple sum values ​​of each group of light intensity values. Table 1 uses ascending order of sum values ​​as an example, but is not limited to this. The microprocessor can then divide the light intensity values ​​into multiple sum value intervals based on the distribution of the multiple sum values ​​of each group of light intensity values. For example, a first light intensity interval 301 with a sum value of 100 to 400, a second light intensity interval 302 with a sum value of 420 to 610, and a third light intensity interval 303 with a sum value greater than 700. At the same time, the microprocessor determines the difference between the maximum and minimum light intensity values ​​within each light intensity interval as the corresponding light intensity threshold. That is, the light intensity threshold corresponding to the first light intensity interval 301 is 31, the light intensity threshold corresponding to the second light intensity interval 302 is 13.75, and the light intensity threshold corresponding to the third light intensity interval 303 is 14.75.

[0128] For example, as shown in Table 1, after dividing the intervals based on the sum value distribution, the judgment and output unit 211 can further divide the difference percentage intervals based on the distribution of the difference percentages of multiple groups of light intensity values. For example, the judgment and output unit 211 can divide multiple groups of light intensity values ​​with similar difference percentage fluctuations within the same light intensity interval into the same difference percentage interval, and use the maximum difference in the light intensity values ​​corresponding to the difference percentage interval as the light intensity threshold. In other words, the judgment and output unit can further divide the sum value interval based on the distribution of the difference percentages.

[0129] For example, as shown in Table 1, within the first light intensity interval 301, the difference percentage fluctuations of the 3rd to 5th groups of light intensity values ​​are similar (i.e., the values ​​are close), and thus the difference percentage intervals corresponding to the 3rd to 5th groups of light intensity values ​​can be divided into the same difference percentage interval, and the maximum light intensity difference of the light intensity values ​​within the difference percentage interval, i.e., 31, is used as the light intensity threshold; the difference percentage intervals corresponding to the 1st to 2nd groups of light intensity values ​​within the first light intensity interval 301 are divided into the same difference percentage interval, and the maximum light intensity difference of the light intensity values ​​within the difference percentage interval, i.e., 3, is used as the light intensity threshold. For example, within the second light intensity interval 302, the percentage fluctuations of the difference values ​​of the 6th and 7th groups of light intensity values ​​are similar, both greater than 1%. Therefore, the percentage fluctuations of the difference values ​​corresponding to the 6th and 7th groups of light intensity values ​​can be divided into the same percentage fluctuation interval, and the maximum difference of the light intensity values ​​within the percentage fluctuation interval, i.e., 13.75, can be used as the light intensity threshold. Furthermore, the percentage fluctuations of the difference values ​​corresponding to the remaining 8th and 9th groups of light intensity values ​​can be divided into the same percentage fluctuation interval, and the maximum difference of the light intensity values ​​within the percentage fluctuation interval, i.e., 2.75, can be used as the light intensity threshold. For example, the similarity of the percentage fluctuations of the difference values ​​corresponding to multiple groups of light intensity values ​​within the same light intensity interval is specific to the light intensity interval. By further dividing the percentage intervals based on the sum value interval, the judgment result of the judgment and output unit can be made more accurate.

[0130] For example, in step S102, using the judgment and output unit in the microprocessor to judge whether the incident light is polarized light, and then judging the type of the reading material may include: determining the light intensity range in which the multiple light intensity values ​​obtained by the multiple first-type light intensity sensors 101 are located, and comparing the maximum difference between the multiple light intensity values ​​with the light intensity threshold of the light intensity range, so that the microprocessor 21 obtains the eye environment information according to the comparison result and outputs the eye protection prompt information accordingly.

[0131] For example, as shown in Table 1, after the judgment and output unit determines the light intensity range and corresponding light intensity threshold for the eye protection device 01, the eye protection device 01 may enter the judgment phase. Specifically, the judgment and output unit may determine the light intensity range based on the sum of the multiple light intensity values ​​from the multiple first-type light intensity sensors 101 and compare the maximum difference between the multiple light intensity values ​​with the light intensity threshold corresponding to the light intensity range. Consequently, in step S103, the microprocessor 21 may output corresponding eye protection prompt information based on the type of material being read.

[0132] For example, as shown in Figure 1 and Table 1, when the maximum difference between the multiple light intensity values ​​is greater than the light intensity threshold corresponding to the light intensity interval, the microprocessor 21 obtains information that the incident light is polarized light, thereby determining that the user's reading material is not paper, such as an electronic book. For example, when the maximum difference between the multiple light intensity values ​​is less than or equal to the light intensity threshold corresponding to the light intensity interval, the microprocessor 21 can obtain information that the incident light is natural light, thereby determining that the user is reading a paper book, and can then send a corresponding eye protection prompt to the user.

[0133] For example, as shown in Figure 1, the control method of the eye protection device provided by at least one embodiment of the present disclosure also includes: using the distance measuring sensor 103 to measure the distance between it and the reading material; using the posture sensor to recognize the user posture; and sending the corresponding distance information and posture information to the mobile terminal display component through the microprocessor 21.

[0134] For example, as shown in FIG1 , the microprocessor in the eye protection device can control the distance sensor 103 so that the distance sensor 103 measures the distance between it and the object being read, such as detecting the vertical distance between the user's eyes and a mobile phone, computer, or book. For example, the microprocessor can also control the posture sensor 212 so that the posture sensor 212 recognizes the user's posture. For example, the posture sensor 212 can recognize the user's posture, such as sitting, lying, or lying down, and assist in judging the sleep data. The microprocessor can set the type of the object being read fed back by the multiple first-type light intensity sensors 101, the distance information between the distance sensor 103 and the object being read, and the user's posture information detected by the posture sensor 212 in the same data packet, and send it to the display component via the wireless transmission unit 213 for the user to make timely adjustments.

[0135] For example, the structure of the eye protection device involved in the control method provided in the embodiment of the present disclosure can refer to the relevant description of the above embodiment, and will not be repeated here.

[0136] The eye protection device of the embodiment of the present application may further include one or more processors and one or more memories. The processor can process data signals and may include various computing structures, such as a complex instruction set computer (CISC) structure, a reduced instruction set computer (RISC) structure, or a structure that implements a combination of multiple instruction sets. The memory can store instructions and / or data executed by the processor. These instructions and / or data may include code for implementing some or all functions of one or more devices described in the embodiment of the present application. For example, the memory includes dynamic random access memory (DRAM), static random access memory (SRAM), flash memory, optical memory, or other memories well known to those skilled in the art.

[0137] In some embodiments of the present application, the eye protection device includes codes and programs stored in a memory; a processor (e.g., a microprocessor) can execute the codes and programs to implement some or all of the functions of the eye protection device as described above.

[0138] In some embodiments of the present application, the eye protection device may be a special hardware device that implements some or all of the functions of the eye protection device described above. For example, the eye protection device may be a circuit board or a combination of multiple circuit boards that implement the functions described above. In an embodiment of the present application, the circuit board or the combination of multiple circuit boards may include: (1) one or more processors; (2) one or more non-transitory computer-readable memories connected to the processors; and (3) firmware stored in the memories that is executable by the processors.

[0139] There are a few points to note:

[0140] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to conventional designs.

[0141] (2) Unless there is any conflict, the features of the same embodiment or different embodiments of the present disclosure may be combined with each other.

[0142] The foregoing description is merely an exemplary embodiment of the present disclosure and is not intended to limit the scope of protection of the present disclosure, which is determined by the appended claims.

Claims

1. An eye protection device, comprising: A main control circuit module, including a microprocessor; The collection circuit module includes multiple light intensity collection units. The light intensity collection unit includes a first type of light intensity sensor and a polarizer, wherein the polarizer is arranged on the light incident side of the first type of light intensity sensor. The microprocessor includes a judgment and output unit, which is configured to judge whether the incident light is polarized light according to a plurality of light intensity values ​​obtained by a plurality of the first type light intensity sensors, and then judge the type of the object being read. The microprocessor is configured to output eye protection prompt information according to the type of the reading material.

2. The eye protection device according to claim 1, wherein: A plurality of first type light intensity sensors are respectively connected to the microprocessor, The judgment and output unit is configured to determine the light intensity range in which the multiple light intensity values ​​obtained by the multiple first type light intensity sensors are located, and compare the maximum difference between the multiple light intensity values ​​with the light intensity threshold of the light intensity range, so that the microprocessor obtains the eye environment information according to the comparison result and outputs the eye protection prompt information accordingly.

3. The eye protection device according to claim 2, wherein: The light intensity interval includes a sum value interval, The judgment and output unit is configured to determine the sum value interval corresponding to the sum value of multiple light intensity values ​​obtained by the multiple first type light intensity sensors, and compare the maximum difference between the multiple light intensity values ​​with the light intensity threshold corresponding to the sum value interval, so that the microprocessor outputs eye protection prompt information according to the comparison result.

4. The eye protection device according to claim 2, wherein: The light intensity interval includes a percentage interval, The judgment and output unit is configured to determine the difference percentage interval corresponding to the difference percentage between the maximum light intensity value and the minimum light intensity value among the multiple light intensity values ​​obtained by the multiple first type light intensity sensors, and compare the maximum difference between the multiple light intensity values ​​with the light intensity threshold corresponding to the percentage interval, so that the microprocessor outputs eye protection prompt information according to the comparison result.

5. The eye protection device according to claim 3 or 4, wherein: The microprocessor is configured to output prompt information that the incident light comes from a non-paper reading material when the maximum difference between the multiple light intensity values ​​is greater than the light intensity threshold.

6. The eye protection device according to any one of claims 1 to 5, wherein: The transmission axes of the plurality of polarizers extend in different directions.

7. The eye protection device according to claim 6, wherein: The plurality of first-type light intensity sensors include a first light intensity sensor and a second light intensity sensor, and the light intensity signals respectively collected by the first light intensity sensor and the second light intensity sensor when corresponding to the eye protection device in the same posture are a group of light intensity collection signals, The judgment and output unit is configured to make judgments based on at least two groups of the light intensity collection signals, and when the judgment and output unit obtains that the incident light is polarized light based on at least one group of the light intensity collection signals, the microprocessor outputs a prompt message that the light intensity signal comes from a non-paper reading material, and the at least two groups of light intensity collection signals respectively correspond to the eye protection device in different postures.

8. The eye protection device according to claim 7, wherein: The extending directions of the light transmission axes of the two polarizers respectively located at the light incident sides of the first light intensity sensor and the second light intensity sensor are perpendicular to each other.

9. The eye protection device according to claim 6, wherein: The number of the plurality of first type light intensity sensors is not less than 3, The extension directions of the light transmission axes of the multiple polarizers arranged on the light incident side of the multiple first type light intensity sensors are parallel to the same plane, the plane is perpendicular to the light incident direction of the first type light intensity sensors, and the extension directions of the light transmission axes of at least three of the polarizers are different.

10. The eye protection device according to claim 9, wherein: The angle between the extension directions of the light transmission axes of two adjacent polarizers is the same as the angle between the extension directions of the light transmission axes of another two adjacent polarizers.

11. The eye protection device according to any one of claims 2 to 10, wherein: The microprocessor is further configured to calibrate the light intensity values ​​collected by the plurality of first-type light intensity sensors during a calibration phase, so that initial light intensity values ​​corresponding to natural light of the plurality of first-type light intensity sensors are substantially equal.

12. The eye protection device according to claim 11, wherein: The microprocessor is also configured to fit the light intensity curves of the plurality of first-type light intensity sensors during a calibration phase, so that the light intensity curves of the plurality of first-type light intensity sensors corresponding to natural light substantially overlap.

13. The eye protection device according to claim 11 or 12, wherein: After the calibration phase and before using the eye protection device to determine the type of the reading material, the microprocessor is further configured to determine the light intensity range and light intensity threshold of the eye protection device.

14. The eye protection device according to any one of claims 1 to 13, wherein: The plurality of first-type light intensity sensors are arranged at intervals, and the eye protection device further comprises a blocking portion, wherein the blocking portion is located in the intervals between adjacent first-type light intensity sensors.

15. The eye protection device according to any one of claims 1 to 14, further comprising a second type of light intensity sensor, wherein the second light intensity sensor is connected to the microprocessor and is configured to detect the intensity of ultraviolet rays.

16. The eye protection device according to any one of claims 1 to 15, further comprising: The distance measuring sensor is located in the acquisition circuit module and is connected to the microprocessor. The distance measuring sensor is configured to measure the distance between the distance measuring sensor and the reading object.

17. The eye protection device according to any one of claims 1 to 16, further comprising: The gesture sensor is located in the main control circuit module, is connected to the microprocessor, and is configured to recognize user gestures.

18. The eye protection device according to any one of claims 1 to 17, further comprising: A battery management unit, located in the acquisition circuit module, and configured to provide power to the main control circuit module and the acquisition circuit module, and detect the charging voltage and working voltage of the battery; A wireless transmission unit, connected to the microprocessor and configured to send and receive wireless data; as well as The alarm module is connected to the microprocessor and is configured to send out alarm prompt information.

19. The eye protection device according to claim 9, wherein: The number of the plurality of first type light intensity sensors is one of 3, 4, 5 and 6.

20. The eye protection device according to any one of claims 1 to 19, wherein: The circuit structures of the plurality of first type light intensity sensors connected to the microprocessor are the same.

21. A method for controlling an eye protection device, comprising: Collecting a plurality of light intensity values ​​by using a plurality of first-type light intensity sensors, wherein a polarizing plate is provided on a light incident side of the first-type light intensity sensors; Using the judgment and output unit in the microprocessor to judge whether the incident light is polarized light, and then judge the type of the object being read; as well as The microprocessor outputs eye protection prompt information corresponding to the type of the reading material.

22. The control method of the eye protection device according to claim 21, wherein: The method of using the determination and output unit in the microprocessor to determine whether the incident light is polarized light and then determining the type of the object being read includes: Determine the light intensity interval in which the multiple light intensity values ​​obtained by the multiple first type light intensity sensors are located, and compare the multiple light intensity values ​​with the light intensity threshold of the light intensity interval, so that the microprocessor obtains eye environment information according to the comparison result and outputs eye protection prompt information accordingly.

23. The control method of the eye protection device according to claim 22, wherein: The outputting of the eye protection prompt information corresponding to the type of the reading material by the microprocessor comprises: When the maximum difference between the multiple light intensity values ​​is greater than the light intensity threshold of the light intensity interval, the microprocessor outputs prompt information that the light comes from non-paper reading material.

24. The control method of the eye protection device according to claim 23, wherein: Before collecting a plurality of light intensity values ​​by using a plurality of first-type light intensity sensors, the control method of the eye protection device further includes a calibration stage. In the calibration phase, the light intensity values ​​collected by the plurality of first-type light intensity sensors are calibrated by a calibration unit so that initial light intensity values ​​corresponding to natural light of the plurality of first-type light intensity sensors are substantially equal.

25. The control method of the eye protection device according to claim 24, wherein: In the calibration stage, before collecting multiple light intensity values ​​by using multiple first-type light intensity sensors, the control method of the eye protection device further includes a fitting process. In the fitting process, the light intensity curves of the plurality of first-type light intensity sensors are fitted by the microprocessor so that the light intensity curves of the plurality of first-type light intensity sensors corresponding to natural light substantially overlap.

26. The control method of the eye protection device according to claim 25, after the calibration stage and before using the eye protection device to determine the type of the reading material, the control method further comprises determining the light intensity range and light intensity threshold of the eye protection device, including: Using the plurality of first-type light intensity sensors to collect N groups of initial light intensity signals corresponding to natural light, where N is a positive integer; Calculate the sum of the initial light intensity values ​​corresponding to each group of initial light intensity signals; Arrange the sums of the initial light intensity values ​​of N groups in sequence; Divide the light intensity interval according to the distribution of N sum values; The difference between the maximum initial light intensity value and the minimum initial light intensity value in the same group of the initial light intensity values ​​in each of the light intensity intervals is set as the light intensity threshold of the light intensity interval.

27. The control method of the eye protection device according to claim 25, wherein determining the light intensity range and light intensity threshold of the eye protection device further comprises: Calculate the difference percentage between the maximum initial light intensity value and the minimum initial light intensity value corresponding to each group of initial light intensity signals; In the light intensity interval divided according to the distribution of the N sum values, arranging the difference percentages of multiple groups of the initial light intensity values ​​in sequence; Divide the difference percentage intervals according to the distribution of multiple groups of difference percentages in each of the light intensity intervals; The difference between the maximum initial light intensity value and the minimum initial light intensity value in the same group of the initial light intensity values ​​within each of the difference percentage intervals is set as the light intensity threshold of the light intensity interval.

28. The control method of the eye protection device according to any one of claims 21 to 27, further comprising: Using a distance measuring sensor to measure the distance between itself and the reading object; Using gesture sensors to identify user gestures; as well as The corresponding distance information and posture information are sent to the display component through the microprocessor.

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