A light emitting device and a method of controlling a light emitting device to produce myopic defocus

Abstract

The present disclosure belongs to the technical field of light emitting device and system, and particularly relates to a light emitting device capable of producing myopia defocus and a method for controlling the light emitting device. The light emitting device comprises a visible light source, a first light source, which accounts for a first proportion of the total light emitting irradiance intensity of the light emitting device; and a second light source, which accounts for a second proportion of the total light emitting irradiance intensity of the light emitting device, and the wavelength of the second light source is longer than that of the first light source by more than 100 nm; an infrared light source, which accounts for a third proportion of the total light emitting irradiance intensity of the light emitting device; and a controller, which is electrically connected with the visible light source and the infrared light source respectively to control the light emitting conditions of the first light source, the second light source and the infrared light source, the first proportion decreases within a predetermined time period, and the third proportion increases within the predetermined time period, so as to form a light emitting device capable of producing myopia defocus. Through the above arrangement, the light emitted by the light emitting device can inhibit the elongation of the eye axis.

Description

Technical Field

[0001] This disclosure belongs to the field of light-emitting devices and systems, and more specifically relates to a light-emitting device for generating myopia defocus and a method for controlling the light-emitting device. Background Technology

[0002] In existing technologies, light-emitting devices are often used as light sources to provide a certain amount of light, but no specific requirements are placed on the light emitted by the device, nor are there any restrictions on the irradiance of different light rays or the ratio of different light irradiances; they are only used for illumination. It is evident that existing technologies lack sufficient understanding of the proportional relationships of the emitted light rays and their intended uses. Summary of the Invention

[0003] This disclosure is made based on the aforementioned needs of the prior art. The technical problem to be solved by this disclosure is to provide a light-emitting device for generating myopic defocus and a method for controlling the light-emitting device to achieve at least one of inhibiting axial elongation and preventing myopia.

[0004] To address the aforementioned problems, the technical solutions provided in this disclosure include:

[0005] A light-emitting device for generating myopia defocus is provided, comprising: a visible light source, including a first light source whose irradiance accounts for a first percentage of the total luminous irradiance of the light-emitting device; a second light source whose irradiance accounts for a second percentage of the total luminous irradiance of the light-emitting device, and the wavelength of the second light source is more than 100 nm longer than the wavelength of the first light source; an infrared light source whose irradiance accounts for a third percentage of the total luminous irradiance of the light-emitting device; and a controller electrically connected to the visible light source and the infrared light source respectively to control the luminescence of the first light source, the second light source, and the infrared light source, wherein the first percentage decreases within a predetermined time period; and the third percentage increases within a predetermined time period, thereby forming a light-emitting device capable of generating myopia defocus.

[0006] Through the aforementioned setup, the controller regulates the visible light source and infrared light source in the light-emitting device to change according to certain rules within a predetermined time period. The combined action of the first light source, the second light source, and the infrared light source generates a myopia-defocusing stimulus to the eye, thereby inhibiting the elongation of the eye axis and effectively preventing myopia. In addition, the infrared light can also produce a phototherapy effect on the cone cells and macula in the eye, thereby improving the overall sensitivity of the optic nerve.

[0007] Preferably, the predetermined time period includes 1 min to 5 min; the wavelength of the first light source is less than 625 nm; the wavelength of the second light source is greater than or equal to 625 nm and less than or equal to 740 nm; and the wavelength of the infrared light source is greater than or equal to 760 nm.

[0008] Making corresponding changes within the aforementioned time period can produce a more obvious visual system adjustment effect. The wavelengths of the first light source, the second light source, and the infrared light source are set so that they work together to produce appropriate myopic defocus stimulation.

[0009] Preferably, the predetermined time period includes a first time period, during which the first proportion decreases, the second proportion increases, and the third proportion increases.

[0010] The above settings gradually increase the stimulation of myopic defocus during the first time period, thereby providing a driving force to pull the retina forward, inhibiting axial elongation, and even shortening the axial length.

[0011] Preferably, the predetermined time period further includes a second time period, which is after the first time period. During the second time period, the first proportion does not change with time; the second proportion decreases with time, and the third proportion increases with time; the second light source includes multiple sub-light sources, wherein the irradiance proportion of the shortest wavelength light decreases, and the irradiance proportion of the longest wavelength light increases.

[0012] By increasing the proportion of longer wavelength light intensity in the total light intensity, the light emitted by the light-emitting device can enhance the myopia defocus stimulation on the eyes.

[0013] Preferably, when the proportion of radiation intensity of light of different wavelengths changes with time, the change is uniform over time.

[0014] This design aims to provide users with a gradual adaptation process, avoiding excessively strong changes that could irritate the eyes and lead to a poor user experience. It could also unintentionally limit the duration or frequency of use, thus failing to effectively inhibit myopia defocus and axial elongation.

[0015] Preferably, the ratio between the second ratio and the first ratio is greater than or equal to 2:1 and less than or equal to 4:1; the ratio between the third ratio and the second ratio is greater than or equal to 1:1 and less than or equal to 3:2.

[0016] The above setup ensures that the light emitted by the second light source falls on the retina, and under the action of the first light source falling in front of the retina, it generates a driving force for myopia defocus, thereby inhibiting the elongation of the eye axis.

[0017] Preferably, the visible light source and the infrared light source change periodically with time at a predetermined time interval, and the visible light source and the infrared light source change from an initial state to a final state within the predetermined time interval.

[0018] Preferably, the first light source includes light with wavelengths of 455nm and 540nm; the second light source includes light with wavelengths of 640nm, 680nm, and 730nm; the infrared light source includes light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm, and 1000nm; in the initial state, the irradiance of the light with wavelengths of 455nm and 540nm is, in order, the total irradiance of the light-emitting device. The irradiance of light with wavelengths of 640nm, 680nm, and 730nm is 12%, 12%, and 12% of the total irradiance of the light-emitting device, respectively; the irradiance of light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm, and 1000nm is 10%, 5%, 5%, 5%, 5%, 5%, 3%, and 2% of the total irradiance of the light-emitting device, respectively.

[0019] Preferably, in the terminated state, the irradiance of light with wavelengths of 455nm and 540nm is 8% and 8% of the total irradiance of the light-emitting device, respectively; the irradiance of light with wavelengths of 640nm, 680nm, and 730nm is 12%, 12%, and 14% of the total irradiance of the light-emitting device, respectively; and the irradiance of light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm, and 1000nm is 14%, 7%, 5%, 5%, 5%, 5%, 3%, and 2% of the total irradiance of the light-emitting device, respectively.

[0020] Preferably, the light-emitting device further includes a clock module connected to the controller to provide time for the controller to control the changes of the first light source, the second light source, and the infrared light source based on the clock; and a storage unit connected to the controller to transmit the stored rules for the changes of the first light source, the second light source, and the infrared light source to the controller.

[0021] The aforementioned first light source, second light source, and infrared light source are all adjusted and changed based on time. Therefore, a clock module is needed to control multiple light sources accordingly, ensuring that the changes of each light source occur in an orderly manner to collectively create myopia defocus stimulation. The rules governing the changes of the first light source, second light source, and infrared light source are stored in the storage unit, allowing each light source to change according to these rules. Under the combined action of the clock module and the storage unit, each light source changes its characteristics according to specific times, so that when the emitted light enters the human eye, it generates myopia defocus stimulation, thereby inhibiting axial elongation.

[0022] A method for controlling a light-emitting device to produce myopia defocus is also provided, comprising: obtaining a first percentage of the irradiance intensity of a first light source relative to the total irradiance intensity of the light-emitting device, and sending a first light-emitting command to the first light source; the first light-emitting command controls the first percentage to decrease within a predetermined time; obtaining a second percentage of the irradiance intensity of a second light source relative to the total irradiance intensity of the light-emitting device, and sending a second light-emitting command to the second light source, wherein the wavelength of the second light source is more than 100 nm longer than the wavelength of the first light source; obtaining a third percentage of the irradiance intensity of an infrared light source relative to the total irradiance intensity of the light-emitting device, and sending a third light-emitting command to the infrared light source; the third light-emitting command controls the third percentage to increase within a predetermined time.

[0023] Through the aforementioned setup, the controller regulates the visible light source and infrared light source in the light-emitting device to change according to certain rules within a predetermined time period. The combined action of the first light source, the second light source, and the infrared light source generates a myopia-defocusing stimulus to the eye, thereby inhibiting the elongation of the eye axis and effectively preventing myopia. In addition, the infrared light can also produce a phototherapy effect on the cone cells and macula in the eye, thereby improving the overall sensitivity of the optic nerve.

[0024] Preferably, the predetermined time period includes 1 min to 5 min; the wavelength of the first light source is less than 625 nm; the wavelength of the second light source is greater than or equal to 625 nm and less than or equal to 740 nm; and the wavelength of the infrared light source is greater than or equal to 760 nm.

[0025] Making corresponding changes within the aforementioned time period can produce a more obvious visual system adjustment effect. The wavelengths of the first light source, the second light source, and the infrared light source are set so that they work together to produce appropriate myopic defocus stimulation.

[0026] Preferably, the predetermined time period includes a first time period, during which the first proportion decreases, the second proportion increases, and the third proportion increases.

[0027] The above settings gradually increase the stimulation of myopic defocus during the first time period, thereby providing a driving force to pull the retina forward, inhibiting axial elongation, and even shortening the axial length.

[0028] Preferably, the predetermined time period further includes a second time period, which is after the first time period. During the second time period, the first proportion does not change with time; the second proportion decreases with time, and the third proportion increases with time; the second light source includes multiple sub-light sources, wherein the proportion of irradiance intensity of the shortest wavelength light decreases, and the proportion of irradiance intensity of the longest wavelength light increases.

[0029] By increasing the proportion of longer wavelength light intensity in the total light intensity, the light emitted by the light-emitting device can enhance the myopia defocus stimulation on the eyes.

[0030] Preferably, when the proportion of radiation intensity of light of different wavelengths changes with time, the change is uniform over time.

[0031] This design aims to provide users with a gradual adaptation process, avoiding excessively strong changes that could irritate the eyes and lead to a poor user experience. It could also unintentionally limit the duration or frequency of use, thus failing to effectively inhibit myopia defocus and axial elongation.

[0032] Preferably, the ratio between the second ratio and the first ratio is greater than or equal to 2:1 and less than or equal to 4:1; the ratio between the third ratio and the second ratio is greater than or equal to 1:1 and less than or equal to 3:2.

[0033] The above setup ensures that the light emitted by the second light source falls on the retina, and under the action of the first light source falling in front of the retina, it generates a driving force for myopia defocus, thereby inhibiting the elongation of the eye axis.

[0034] Preferably, the visible light source includes a first light source and a second light source; the visible light source and the infrared light source change periodically with time at a predetermined time interval, and the visible light source and the infrared light source change from an initial state to a final state within the predetermined time interval.

[0035] Preferably, the first light source includes light with wavelengths of 455nm and 540nm; the second light source includes light with wavelengths of 640nm, 680nm, and 730nm; the infrared light source includes light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm, and 1000nm; in the initial state, the irradiance of the light with wavelengths of 455nm and 540nm is, in order, the total irradiance of the light-emitting device. The irradiance of light with wavelengths of 640nm, 680nm, and 730nm is 12%, 12%, and 12% of the total irradiance of the light-emitting device, respectively; the irradiance of light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm, and 1000nm is 10%, 5%, 5%, 5%, 5%, 5%, 3%, and 2% of the total irradiance of the light-emitting device, respectively.

[0036] Preferably, in the terminated state, the irradiance of light with wavelengths of 455nm and 540nm is 8% and 8% of the total irradiance of the light-emitting device, respectively; the irradiance of light with wavelengths of 640nm, 680nm, and 730nm is 12%, 12%, and 14% of the total irradiance of the light-emitting device, respectively; and the irradiance of light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm, and 1000nm is 14%, 7%, 5%, 5%, 5%, 5%, 3%, and 2% of the total irradiance of the light-emitting device, respectively.

[0037] Preferably, the first proportion is obtained based on the luminous power of the first light source and the luminous power of the light-emitting device; the second proportion is obtained based on the luminous power of the second light source and the luminous power of the light-emitting device; and the third proportion is obtained based on the luminous power of the infrared light source and the luminous power of the light-emitting device.

[0038] Compared with existing technologies, this disclosure has multiple light sources with different wavelengths. The wavelengths of each light source meet certain conditions, and the irradiance of the multiple light sources is related to each other. This allows the emitted light to create a myopic defocus stimulus on the eye. The myopic defocus stimulus causes the light entering the eye to form multiple focal points. The focal point of the longest or relatively long wavelength light falls on the retina, while the focal point of the shorter wavelength light is located in front of the retina. This produces myopic defocus, which makes the eye want to see the image in front of the retina more clearly, thereby generating a driving force that pulls the retina forward, thus inhibiting the elongation of the eye axis. In addition, the light-emitting device includes an infrared light source to stimulate the activity of cone cells in the eye, thereby improving the sensitivity of the optic nerve as a whole and improving visual acuity to a certain extent. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0040] Figure 1 A schematic diagram showing the imaging path and focal position of two types of light with different wavelengths incident on the eye;

[0041] Figure 2 A schematic diagram showing the imaging path and focal point after two different wavelengths of light are incident on the eye and processed.

[0042] Figure 3This is a schematic diagram of the structure of a light-emitting device for generating myopia defocus according to an embodiment of this disclosure;

[0043] Figure 4 This is a flowchart illustrating the steps of a method for controlling a light-emitting device to generate myopia defocus in an embodiment of this disclosure. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] In the description of the embodiments of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the term "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0046] Throughout the text, the terms “top,” “bottom,” “above,” “below,” and “on top” refer to the relative positions of components of the device, such as the relative positions of the top and bottom substrates within the device. It is understood that the device is multifunctional and independent of its spatial orientation.

[0047] Myopia defocus has been proven to have a certain effect on inhibiting myopia. Its working principle is that when the human eye focuses on an image plane that can be clearly imaged on the retina, it is called the principal image plane. If, through optical means, another image plane is presented in front of the retina while the principal image plane is on the retina, this is called the defocus image plane. At this time, the two image planes work together to form axial myopia defocus, causing the eye to tend to see the image presented in front of the retina more clearly, thus moving the retina forward to inhibit the elongation of the eye axis, and may even reduce the degree of myopia.

[0048] Different colors of light have different wavelengths and different refractive indices in the same medium, causing different colors of light to focus at different locations when they enter the eye. For example... Figure 1 As shown, when more than one color of light enters the eye, such as Figure 1 In the imaging path A, the image formed by the longest wavelength light will fall behind, such as... Figure 1In imaging path B, the image formed by the shortest wavelength light will fall in front, and the two colors of light form different focal points on the axis to create axial chromatic aberration. For example... Figure 2 As shown, based on this, such as Figure 2 If the imaging path a in the image can be moved forward from behind the retina 10 to the retina 10, then, as shown in the image path a, the focal point of the light falling behind the retina 10 can be moved forward onto the retina 10. Figure 2 In the imaging path b, the focal point of the light that was originally focused in front of the retina 10 will also move forward and move away from the retina 10, thus producing myopic defocus.

[0049] To facilitate understanding of the embodiments of this application, the following will provide further explanation and description with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this application.

[0050] Example 1

[0051] This embodiment provides a light-emitting device for generating myopia defocus, such as... Figure 3 As shown.

[0052] The aforementioned light-emitting device includes a visible light source, an infrared light source 3, a controller 4, a clock module 5, and a storage unit 6.

[0053] The visible light source includes a first light source 1 and a second light source 2. The irradiance of the first light source 1 accounts for a first percentage of the total luminous irradiance of the light-emitting device, and correspondingly, the irradiance of the second light source 2 accounts for a second percentage of the total luminous irradiance of the light-emitting device.

[0054] Furthermore, the wavelength of the first light source 1 is less than 625nm, which includes visible light excluding wavelengths greater than or equal to 625nm; the wavelength of the second light source 2 is greater than or equal to 625nm and less than or equal to 740nm, which includes red light in the visible spectrum. The wavelength of the second light source 2 is more than 100nm longer than that of the first light source 1. This setting ensures that the light emitted by the first light source 1 and the light emitted by the second light source 2 have a certain contrast. When the first light source 1 and the second light source 2 are incident on the eye, the imaging focus of the second light source 2 falls behind the imaging focus of the first light source 1, and the distance between them is sufficient so that when the focus of the second light source 2 falls on the retina, the eye experiences myopic defocus under the stimulation of the focus of the first light source 1 falling in front of the retina, i.e., it has a tendency to pull the retina forward, thereby inhibiting the elongation of the eye axis.

[0055] Furthermore, the location where different light rays form the focal point of an image upon entering the eye is related to the proportion of their respective irradiance within the total irradiance of the incident light rays. Due to the eye's focusing function, light rays with a higher proportion of irradiance will focus on the retina for a clear image. Therefore, continuing from the above setup, in addition to ensuring the contrast of the light rays entering the eye is sufficient to produce myopic defocus and satisfying the distance limit between the focal points, it is also necessary to ensure that the longest wavelength light forms a focal point on the retina, so that the wavelength of the light rays that contrasts with it forms a focal point in front of the retina. In other words, the ratio of the first light source 1 and the second light source 2 needs to be limited to ensure that the light from the second light source 2 forms a focal point on the retina as much as possible. The ratio between the second ratio and the first ratio is greater than or equal to 2:1 and less than or equal to 4:1. This setup ensures that the light emitted from the second light source 2 falls on the retina and, under the influence of the first light source 1 falling in front of the retina, generates a driving force for myopic defocus, thereby suppressing axial elongation.

[0056] Infrared light source 3, whose irradiance accounts for a third proportion of the total irradiance of the light-emitting device. Furthermore, the wavelength of the infrared light source 3 is greater than or equal to 760nm. Based on the imaging focus of the first light source 1 and the second light source 2, and the principle of generating myopic defocus, longer-wavelength infrared light is introduced. That is, when infrared light, along with the light emitted from the first light source 1 and the second light source 2, enters the human eye, the focal point of the infrared light in the human eye will fall behind the retina. To enable the light entering the eye to work together to generate myopic defocus, the infrared irradiance is increased. Specifically, the ratio between the third proportion and the second proportion is set to be greater than or equal to 1:1 and less than or equal to 3:2. In addition, infrared light can have a phototherapy effect on cone cells and the macula, stimulating their activity, preventing aging, improving the overall sensitivity of the optic nerve, and to a certain extent improving visual acuity.

[0057] The controller 4 is electrically connected to the visible light source and the infrared light source respectively to control the light emission of the first light source 1, the second light source 2 and the infrared light source 3. The first proportion decreases within a predetermined time period; the third proportion increases within a predetermined time period to form a light emission device capable of generating myopia defocus.

[0058] By reducing the first proportion and increasing the third proportion within a predetermined time period, the stimulation of myopic defocus on the eye is enhanced, thereby gradually increasing the degree of myopic defocus within the predetermined time period, resulting in a suitable accommodative effect on the eye. Specifically, the predetermined time period includes 1 minute to 5 minutes. Making corresponding changes within this time period can produce a relatively obvious accommodative effect on the visual system. If it exceeds 5 minutes, the change in color contrast is too slow, resulting in weak stimulation of the nervous system and insufficient training intensity for the ciliary muscle and other accommodative nerves, muscles, and tissues of the visual refractive system, leading to an insignificant effect. If it is too rapid, it will cause excessive fatigue of the visual nerve and muscle tissue systems, thereby reducing the accommodative ability of the visual nerve and muscle tissue systems.

[0059] The spectrum of sunlight in nature is a continuous natural spectrum, unlike the commonly used artificial light sources. The sun's spectrum has strong irradiance in the red and infrared portions. Therefore, if specific red and infrared light are added to artificial light sources, and the spectral composition is adjusted in a specified direction (gradually increasing) according to the changes in sunlight during selected time periods, while the overall light intensity variation is reduced, it can help users, especially teenagers, inhibit the onset of myopia and, to some extent, treat it. It is also important to emphasize that a certain level of short- and medium-wavelength spectral components is needed to create effective stimulation. Preferably, the best time period is from 1:30 PM to 4:30 PM.

[0060] The visible light source and infrared light source 3 change periodically with a predetermined time period, changing from an initial state to a final state within the predetermined time period. The spectrum from 1:30 PM to 4:30 PM is simulated by defining multiple time nodes within the predetermined time period.

[0061] Furthermore, the predetermined time period includes a first time period and a second time period, the second time period being adjacent to the first time period and set after the first time period. Within the first time period, the first proportion decreases, the second proportion increases, and the third proportion increases. Specifically, the first light source 1 includes light with wavelengths of 455nm and 540nm; the second light source 2 includes light with wavelengths of 640nm, 680nm, and 730nm; the infrared light source 3 includes light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm, and 1000nm; the visible light source and the infrared light source 3 change from an initial state, the initial state including irradiation with light of wavelengths of 455nm and 540nm. The irradiance of light with wavelengths of 640nm, 680nm, and 730nm is 12% and 12% of the total irradiance of the light-emitting device, respectively; the irradiance of light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm, and 1000nm is 10%, 5%, 5%, 5%, 5%, 5%, 3%, and 2% of the total irradiance of the light-emitting device, respectively.

[0062] During the first time period, the first proportion decreases, the second proportion increases, and the third proportion also increases. Based on the proportions of each wavelength and irradiance of the first light source 1, the second light source 2, and the infrared light source, the changes during the first time period include the first half and the second half. In the first half, the initial state changes as follows: the proportions of the irradiance of light with wavelengths of 455nm and 540nm to the total irradiance of the light-emitting device decrease to 10% and 10%, respectively; the proportions of the irradiance of light with wavelengths of 640nm, 680nm, and 730nm to the total irradiance of the light-emitting device increase to 14%, 14%, and 12%, respectively; and the proportions of the irradiance of light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm, and 1000nm to the total irradiance of the light-emitting device remain unchanged. Based on the proportions of each wavelength formed after the changes in the first half, the changes in the second half are as follows: the irradiance of light with wavelengths of 455nm and 540nm continues to decrease to 8% and 8% of the total irradiance of the light-emitting device, respectively; the irradiance of light with wavelengths of 640nm, 680nm, and 730nm continues to increase to 14%, 14%, and 14% of the total irradiance of the light-emitting device, respectively; and the irradiance of light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm, and 1000nm increases to 12%, 5%, 5%, 5%, 5%, 5%, 3%, and 2% of the total irradiance of the light-emitting device, respectively.

[0063] During the second time period, the first proportion remains unchanged; the second proportion decreases over time, and the third proportion increases over time. The second light source 2 includes multiple sub-light sources, where the proportion of irradiance intensity of the shortest wavelength light decreases, and the proportion of irradiance intensity of the longest wavelength light increases. Based on the proportions of each wavelength formed after the changes in the first time period, the changes in the second time period are performed to obtain the final state, specifically: the irradiance intensity of light with wavelengths of 455nm and 540nm is 8% and 8% of the total irradiance intensity of the light-emitting device, respectively; the irradiance intensity of light with wavelengths of 640nm, 680nm, and 730nm is 12%, 12%, and 14% of the total irradiance intensity of the light-emitting device, respectively; and the irradiance intensity of light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm, and 1000nm is 14%, 7%, 5%, 5%, 5%, 5%, 3%, and 2% of the total irradiance intensity of the light-emitting device, respectively.

[0064] When the proportion of radiation intensity of light of different wavelengths changes over time, the change is uniform over time. This setting provides users with a gradual adaptation condition, avoiding excessively strong changes that could irritate the eyes, leading to a poor user experience and unintentionally reducing usage time or frequency, thus failing to effectively inhibit myopia defocus and suppress axial elongation.

[0065] The light-emitting device also includes a clock module 5 and a storage unit 6. The clock module 5 is connected to the controller 4, providing time for the controller 4 to control the changes of the first light source 1, the second light source 2, and the infrared light source 3 based on a clock. The storage unit 6 is connected to the controller 4 to transmit the stored rules for the changes of the first light source 1, the second light source 2, and the infrared light source 3 to the controller 4. The first light source 1, the second light source 2, and the infrared light source 3 are all adjusted and changed based on time. Therefore, it is necessary to control multiple light sources accordingly based on the clock module 5 to ensure that the changes of each light source are orderly, so as to work together to form a myopic defocus stimulus. The rules for the changes of the first light source 1, the second light source 2, and the infrared light source 3 are all stored in the storage unit 6, so that each light source changes according to the rules. Under the combined action of the clock module 5 and the storage unit 6, each light source changes its characteristics according to a specific time so that when the emitted light enters the human eye, it generates a myopic defocus stimulus, thereby inhibiting axial elongation.

[0066] Furthermore, the method for acquiring the data stored in the storage unit 6 includes: acquiring the solar spectrum at a predetermined location, selecting solar spectral data within a specific time period for storage, to form a data source capable of adjusting the proportion of light source irradiance according to the data in the storage unit 6. Alternatively, the acquisition method can also be: acquiring the solar spectrum at the predetermined location in real time and uploading it to a server; the light-emitting device connects to the internet and downloads relevant spectral data information from the server, so as to adjust the proportion of each light source of the light-emitting device according to the irradiance proportion of the real-time spectrum.

[0067] When the light-emitting device is used as an ambient light source, such as a desk lamp, preferably, a total luminous intensity of 400 Lux can produce a good effect in preventing and treating myopia. When the light-emitting device is used as a light source for video or text images, such as an e-book, preferably, the total luminous intensity of the light-emitting device is within the range of 20 Lux to 60 Lux. Only within this range can the lower limit of the sensitivity threshold of the cone cells contained in the 6°-8° field of view of the eye's retina be reached, thereby achieving a corresponding effect in preventing myopia.

[0068] Example 2

[0069] This embodiment provides a method for controlling a light-emitting device to produce myopia defocus, such as... Figure 4As shown.

[0070] The above method includes: obtaining a first proportion of the irradiance intensity of the first light source to the total irradiance intensity of the light-emitting device, and sending a first light-emitting command to the first light source; the first light-emitting command controls the first proportion to decrease within a predetermined time.

[0071] Furthermore, the first proportion is obtained based on the luminous power of the first light source and the luminous power of the light-emitting device. The wavelength and irradiance change process of the first light source are the same as those in Example 1, and will not be described in detail here.

[0072] The second proportion of the irradiance intensity of the second light source to the total irradiance intensity of the light-emitting device is obtained, and a second light-emitting command is sent to the second light source, wherein the wavelength of the second light source is more than 100 nm longer than the wavelength of the first light source.

[0073] Furthermore, the second proportion is obtained based on the luminous power of the second light source and the luminous power of the light-emitting device. The wavelength and irradiance variation process of the second light source are the same as those in Example 1, and will not be described in detail here.

[0074] The third proportion of the irradiance intensity of the infrared light source to the total irradiance intensity of the light-emitting device is obtained, and a third light-emitting command is sent to the infrared light source; the third light-emitting command controls the third proportion to increase within a predetermined time.

[0075] Furthermore, the third proportion is obtained based on the luminous power of the infrared light source and the luminous power of the light-emitting device. The wavelength and irradiance change process of the third light source are the same as those in Example 1, and will not be described in detail here.

[0076] Furthermore, the relationship between the first proportion, the second proportion, and the third proportion, as well as the way in which they change over time, are the same as those involved in Example 1.

[0077] When the light source is used as an ambient light source, such as a desk lamp, the first, second, and third light-emitting commands include changing the current flowing through each light source and / or changing the voltage applied to each light source, thereby changing its luminous power. In one embodiment of this example, a varying voltage between 2.5 and 6.3V can be used to control the power of each light source, creating a gradual change to generate or enhance the irradiance of the myopic defocus stimulus, thereby suppressing axial elongation. In another embodiment of this example, if each light source in the light-emitting device is located in a constant voltage circuit, the luminous intensity of the PWM modulation device can be used to create a gradual change to generate or enhance the irradiance of the myopic defocus stimulus, thereby suppressing axial elongation.

[0078] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above description is only a specific embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A light-emitting device for generating myopia defocus, characterized in that, include: The visible light source, including the first light source, has an irradiance intensity that accounts for a first proportion of the total luminous irradiance intensity of the light-emitting device; The second light source has an irradiance intensity that accounts for a second proportion of the total irradiance intensity of the light-emitting device, and the wavelength of the second light source is more than 100 nm longer than the wavelength of the first light source. An infrared light source, the intensity of which accounts for the third largest proportion of the total luminous irradiance of the light-emitting device; A controller is electrically connected to the visible light source and the infrared light source respectively to control the light emission of the first light source, the second light source and the infrared light source. The first proportion decreases within a predetermined time period; the third proportion increases within a predetermined time period to form a light emission device capable of generating myopia defocus. The predetermined time period includes a first time period and a second time period. During the first time period, the first proportion decreases, the second proportion increases, and the third proportion increases. The second time period is after the first time period. During the second time period, the first proportion does not change with time; the second proportion decreases with time, and the third proportion increases with time. The second light source includes multiple sub-light sources, wherein the irradiance proportion of the shortest wavelength light decreases, and the irradiance proportion of the longest wavelength light increases.

2. The light-emitting device for generating myopia defocus according to claim 1, characterized in that, The predetermined time period includes 1 min to 5 min; The wavelength of the first light source is less than 625nm; The wavelength of the second light source is greater than or equal to 625nm and less than or equal to 740nm; The wavelength of the infrared light source is greater than or equal to 760nm.

3. The light-emitting device for generating myopia defocus according to claim 1, characterized in that, When the proportion of radiation intensity of light of different wavelengths changes with time, the change is uniform over time.

4. The light-emitting device for generating myopia defocus according to claim 1, characterized in that, The ratio between the second ratio and the first ratio is greater than or equal to 2:1 and less than or equal to 4:1; The ratio between the third ratio and the second ratio is greater than or equal to 1:1 and less than or equal to 3:

2.

5. The light-emitting device for generating myopia defocus according to claim 1, characterized in that, The visible light source and the infrared light source change periodically with time, with a predetermined time period. The visible light source and the infrared light source change from an initial state to a final state within the predetermined time period.

6. A light-emitting device for generating myopia defocus according to claim 5, characterized in that, The first light source includes light with wavelengths of 455nm and 540nm; The second light source includes light with wavelengths of 640nm, 680nm and 730nm; The infrared light source includes light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm and 1000nm; In the initial state, the irradiance of light with wavelengths of 455 nm and 540 nm is 12% and 12% of the total irradiance of the light-emitting device, respectively. The irradiance of light with wavelengths of 640nm, 680nm, and 730nm is 12%, 12%, and 12% of the total irradiance of the light-emitting device, respectively. The irradiance of light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm and 1000nm is 10%, 5%, 5%, 5%, 5%, 5%, 3% and 2% of the total irradiance of the light-emitting device, respectively.

7. A light-emitting device for generating myopia defocus according to claim 5, characterized in that, In the terminated state, the irradiance of light with wavelengths of 455nm and 540nm is 8% and 8% of the total irradiance of the light-emitting device, respectively. The irradiance of light with wavelengths of 640nm, 680nm, and 730nm is 12%, 12%, and 14% of the total irradiance of the light-emitting device, respectively. The irradiance of light with wavelengths of 760nm, 780nm, 810nm, 850nm, 900nm, 940nm, 980nm and 1000nm is 14%, 7%, 5%, 5%, 5%, 5%, 3% and 2% of the total irradiance of the light-emitting device, respectively.

8. The light-emitting device for generating myopia defocus according to claim 1, characterized in that, The light-emitting device also includes a clock module, which is connected to the controller and provides time for the controller to control the changes of the first light source, the second light source and the infrared light source with the clock as the standard. The storage unit is connected to the controller to transmit the stored rules of variation of the first light source, the second light source, and the infrared light source to the controller.

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