A display method of a defocus pattern, a display device, and a display system

Abstract

The present disclosure belongs to the field of image display, and particularly relates to a display method, a display device and a display system of a defocus pattern. The display method of the defocus pattern comprises: obtaining and presenting a first critical target image based on an adjustable first target image; the first critical target image comprises: adjusting a first brightness of the first target image until the first critical condition is reached, to obtain the first critical target image; obtaining a second critical target image based on an adjustable second target image, and presenting the second critical target image while presenting the first critical target image, wherein the second critical target image comprises: under the condition that the first critical target image is in a display state, adjusting a second brightness of the second target image until the second critical condition is reached, to obtain the second critical target image; the center wavelength of the first target image is greater than the center wavelength of the second target image, and the difference between the two is at least 50 nm, so as to inhibit the elongation of the eye axis.

Description

Technical Field

[0001] This disclosure pertains to the field of image display, and more specifically relates to a method, device, and system for displaying defocused patterns. Background Technology

[0002] Studies have shown that myopic defocus can effectively inhibit axial elongation and may even shorten the axial length. Myopic defocus (also known as positive defocus) stimulation refers to the phenomenon where, when the human eye focuses on an image plane that is clearly imaged on the retina (called the principal image plane), if another image plane or part of the principal image plane can be simultaneously imaged in front of the retina through optical means, a positive defocus stimulation is formed in optometry. Chromatic aberration (LCA), on the other hand, refers to the different refractive indices of different colors of light due to their different wavelengths in the same medium. Consequently, different colors of light will focus at different focal points, and under appropriate induction, myopic defocus stimulation can be generated. 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 method, device and system for displaying a defocus pattern to form a myopic defocus that provides an inhibition of the tendency of axial elongation.

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

[0005] A method for displaying a defocused pattern is provided, comprising: obtaining and presenting a first critical target image based on an adjustable first target image; the first critical target image comprising adjusting a first brightness of the first target image until it reaches a first critical condition to obtain the first critical target image; obtaining a second critical target image based on an adjustable second target image, and presenting the second critical target image simultaneously with the first critical target image, wherein the second critical target image comprises adjusting a second brightness of the second target image until it reaches a second critical condition while the first critical target image is in a display state to obtain the second critical target image; the center wavelength of the first target image is greater than the center wavelength of the second target image, and the difference between the two is at least 50 nm.

[0006] By displaying a first and a second target image, and by setting their center wavelengths so that the first and second critical target images appear at different positions in the observer's eye, when the focus of the first critical target image falls on the retina, due to the difference in the center wavelengths of the first and second target images, the focus of the second critical target image will fall in front of the retina. At this time, the first and second critical target images together form myopic defocus, and the retina tends to move forward, so as to effectively inhibit the elongation of the eye axis and slow down or even reduce the degree of myopia.

[0007] Preferably, the first visual target image is presented as a first image on the observer's eye; the observer continuously observes the first visual target image at a preset distance from the first image; the first critical condition includes the first brightness of the first visual target image changing from small to large until the first image falls on the observer's retina.

[0008] This setting is used to adjust the brightness of the first target image so that the first image falls on the retina.

[0009] Preferably, the second critical condition includes that when the observer continuously observes the first critical target image at a preset distance from the first image, the second brightness of the second target image changes from small to large until the edge of the first image is at a critical position about to leave the observer's retina.

[0010] By increasing the second brightness, the stimulation generated by the second optotype image is increased to enhance myopic defocus stimulation, thereby inhibiting axial elongation.

[0011] Preferably, the preset distance is 3-5m.

[0012] Setting a preset distance aims to provide conditions for myopic defocus induced by axial chromatic aberration in the human eye, using axial chromatic aberration to stimulate the accommodation of the lens to suppress axial elongation and prevent the negative effects of accommodation lag.

[0013] Preferably, the first and second target images are arranged within the 0-5° field of view of the observer.

[0014] This arrangement ensures that the first and second images fall on the center of the retina.

[0015] Preferably, the first target image is at least partially formed by an electrically powered first light source; the brightness variation of the first target image from small to large includes increasing the current flowing through the first light source.

[0016] The brightness of the first target image is increased by means of the above method, thereby enabling the first critical image to be imaged on the retina.

[0017] Preferably, the second target image is at least partially formed by an electrically powered second light source; the brightness variation of the second target image from small to large includes increasing the current flowing through the second light source.

[0018] By increasing the stimulation to the eyes in the above way, the second visual target image is moved away from the retina, thereby enhancing the defocusing effect of myopia and effectively inhibiting axial elongation.

[0019] Preferably, the first target image includes a plurality of pixels, wherein at least some of the pixels include attribute values ​​of the three primary optical colors RGB, wherein the attribute value of R is greater than the attribute values ​​of G and B; the first target image includes a plurality of pixels, wherein at least some of the pixels include attribute values ​​of the three primary optical colors RGB, wherein the attribute value of B is greater than the attribute values ​​of R and G.

[0020] The above method facilitates controlling the difference between the center wavelength of the first target image and the center wavelength of the second target image by adjusting the RGB attribute values.

[0021] Preferably, adjusting the first brightness of the first target image includes increasing the attribute value of R while keeping the attribute values ​​of G and B unchanged.

[0022] The brightness of the first visual target image is increased by increasing the R attribute value, which makes it easy to adjust and ensures that the first visual target image falls on the observer's retina as much as possible.

[0023] Preferably, adjusting the second brightness of the second target image includes increasing the attribute value of B while keeping the attribute values ​​of R and G unchanged.

[0024] The brightness of the first optotype image is increased by increasing the attribute value of B, thereby increasing the amount of stimulation received by the observer. This, together with the first critical optotype image, produces myopic defocus, thereby inhibiting the elongation of the axial length.

[0025] Preferably, at least some pixels in the first target image have G and B attribute values ​​of 0; and at least some pixels in the second target image have R and G attribute values ​​of 0.

[0026] By using the above methods, the brightness of the red light generated by the first visual target image and the blue light generated by the second visual target image are increased. This facilitates adjustment while ensuring that the center wavelengths of the first and second visual target images cause myopia defocus in the eye, thereby inhibiting axial elongation.

[0027] A1. A display device for a defocused pattern, comprising:

[0028] The first display adjustment module obtains and presents a first critical target image based on an adjustable first target image; the first critical target image includes adjusting the first brightness of the first target image until it reaches a first critical condition to obtain the first critical target image.

[0029] The second display adjustment module obtains a second critical target image based on an adjustable second target image, and presents the second critical target image while presenting the first critical target image. The second critical target image includes adjusting the second brightness of the second target image until it reaches the second critical condition while the first critical target image is in the display state, thereby obtaining the second critical target image.

[0030] The center wavelength of the first target image is greater than the center wavelength of the second target image, and the difference between the two is at least 50 nm.

[0031] A2. A display device for a defocused pattern according to A1, characterized in that,

[0032] The first visual target image appears as a first image on the observer's eye;

[0033] The observer continuously observes the first target image at a preset distance from the first image;

[0034] The first critical condition includes a first brightness of the first target image changing from small to large until the first image falls on the observer's retina.

[0035] A3. A display device for a defocused pattern according to A2, characterized in that,

[0036] The second critical condition includes,

[0037] When the observer continuously observes the first critical target image at a preset distance from the first image...

[0038] The second brightness of the second target image changes from small to large until the edge of the first image is at a critical position about to leave the observer's retina.

[0039] A4. A display device for a defocused pattern according to A3, characterized in that the preset distance is 3-5m.

[0040] A5. A display device for a defocused pattern according to A4, characterized in that,

[0041] The first and second target images are arranged within the 0-5° field of view of the observer.

[0042] A6. A display device for a defocused pattern according to A5, characterized in that,

[0043] The first target image is formed at least partially by an electrically powered first light source;

[0044] The brightness of the first target image changes from small to large by increasing the current flowing through the first light source.

[0045] A7. A display device for a defocused pattern according to A6, characterized in that,

[0046] The second target image is formed at least partially by an electrically powered second light source;

[0047] The brightness of the second target image changes from small to large by increasing the current flowing through the second light source.

[0048] A8. A display device for a defocused pattern according to A4, characterized in that,

[0049] The first target image includes a plurality of pixels, wherein at least some of the pixels include attribute values ​​of the three primary optical colors RGB, wherein the attribute value of R is greater than the attribute values ​​of G and B;

[0050] The second target image includes a plurality of pixels, wherein at least some of the pixels include attribute values ​​of the three primary optical colors RGB, wherein the attribute value of B is greater than the attribute values ​​of R and G.

[0051] A9. A method for displaying a defocused pattern according to A8, characterized in that,

[0052] Adjusting the first brightness of the first target image involves increasing the R value while keeping the G and B values ​​constant.

[0053] A10. A display device for a defocused pattern according to A9, characterized in that,

[0054] Adjusting the second brightness of the second target image involves increasing the B value while keeping the R and G values ​​constant.

[0055] A11. A display device for a defocused pattern according to any one of A7-A9, characterized in that,

[0056] The G and B attribute values ​​of at least some pixels in the first target image are 0;

[0057] The R and G attribute values ​​of at least some pixels in the second target image are 0.

[0058] B1. A display system for defocused patterns, characterized in that it comprises:

[0059] A display showing a defocused pattern, the defocused pattern including a first target image and a second target image;

[0060] A controller, connected to the display, for controlling the display state of the display;

[0061] The controller includes a first adjustment module, which obtains and presents a first critical target image based on an adjustable first target image; the first critical target image includes adjusting the first brightness of the first target image until it reaches a first critical condition to obtain the first critical target image.

[0062] and

[0063] The second adjustment module obtains a second critical target image based on an adjustable second target image, and presents the second critical target image while presenting the first critical target image. The second critical target image includes adjusting the second brightness of the second target image until it reaches a second critical condition while the first critical target image is in the display state, thereby obtaining the second critical target image. The center wavelength of the first target image is greater than the center wavelength of the second target image, and the difference between the two is at least 50nm.

[0064] B2. A display system for defocused patterns according to B1, characterized in that,

[0065] The first visual target image appears as a first image on the observer's eye;

[0066] The observer continuously observes the first target image at a preset distance from the first image;

[0067] The first critical condition includes a first brightness of the first target image changing from small to large until the first image falls on the observer's retina.

[0068] B3. A display system for defocused patterns according to B2, characterized in that,

[0069] The second critical condition includes,

[0070] When the observer continuously observes the first critical target image at a preset distance from the first image...

[0071] The second brightness of the second target image changes from small to large until the edge of the first image is at a critical position about to leave the observer's retina.

[0072] B4. A display system for a defocused pattern according to B3, characterized in that the preset distance is 3-5m.

[0073] B5. A display system for a defocused pattern according to B4, characterized in that the first target image and the second target image are arranged within the 0-5° field of view of the observer.

[0074] B6. A display system for defocused patterns according to B5, characterized in that,

[0075] The first target image is formed at least partially by an electrically powered first light source;

[0076] The brightness of the first target image changes from small to large by increasing the current flowing through the first light source.

[0077] B7. A display system for defocused patterns according to B6, characterized in that,

[0078] The second target image is formed at least partially by an electrically powered second light source;

[0079] The brightness of the second target image changes from small to large by increasing the current flowing through the second light source.

[0080] B8. A display system for defocused patterns according to B4, characterized in that,

[0081] The first target image includes a plurality of pixels, wherein at least some of the pixels include attribute values ​​of the three primary optical colors RGB, wherein the attribute value of R is greater than the attribute values ​​of G and B;

[0082] The second target image includes a plurality of pixels, wherein at least some of the pixels include attribute values ​​of the three primary optical colors RGB, wherein the attribute value of B is greater than the attribute values ​​of R and G.

[0083] B9. A display system for defocused patterns according to B8, characterized in that,

[0084] Adjusting the first brightness of the first target image involves increasing the R value while keeping the G and B values ​​constant.

[0085] B10. A display system for defocused patterns according to B9, characterized in that,

[0086] Adjusting the second brightness of the second target image involves increasing the B value while keeping the R and G values ​​constant.

[0087] B11. A display system for a defocused pattern according to any one of B8-B10, characterized in that,

[0088] The G and B attribute values ​​of at least some pixels in the first target image are 0;

[0089] The R and G attribute values ​​of at least some pixels in the second target image are 0.

[0090] Compared with the prior art, this disclosure sets the colors of the first and second visual target images so that one image falls on the retina of the human eye and the other image falls in front of the retina. The two work together to produce myopic defocus, creating a tendency to pull the retina forward, thereby inhibiting the elongation of the eye axis and alleviating the degree of myopia. In addition, this method is adjustable for different viewers to be targeted. The brightness of the first and second visual target images can be adjusted according to the different eye conditions of different viewers. Attached Figure Description

[0091] 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.

[0092] Figure 1 This is a schematic diagram of axial myopia defocus.

[0093] Figure 2 A flowchart illustrating the steps of a method for displaying a defocused pattern provided in this disclosure;

[0094] Figure 3 A diagram illustrating how red and blue light converge to fall into the human eye under natural conditions;

[0095] Figure 4 This is a schematic diagram showing how the focal point formed by the red and blue light after adjusting their brightness falls into the human eye.

[0096] Figure 5 This is a schematic diagram of a defocused pattern display system provided in this disclosure. Detailed Implementation

[0097] 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.

[0098] 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.

[0099] Axial myopia defocusing has been shown to have a certain effect on inhibiting myopia. Its working principle is as follows: Figure 1 As shown, when the human eye focuses on an image plane, that image plane can be clearly imaged on the retina 1, and is called the principal image plane. If, through optical means, another image plane is presented in front of the retina 1 when the principal image plane falls on the retina 1, the two image planes work together to form axial myopic defocus, causing the eye to have a tendency to want to see the image presented in front of the retina 1 clearly, driving the retina 1 to move forward to inhibit the elongation of the eye axis, and may even reduce the degree of myopia.

[0100] Furthermore, because different colors of light have different wavelengths and different refractive indices in the same medium, different colors of light focus at different focal points. Moreover, when different colors of light enter the eye, due to their different wavelengths, some colors will focus in front of the retina, while others will focus behind it. If the focal point that will fall behind the retina and is furthest from it can be controlled and directed onto the retina using optical means, then the shorter wavelength light will focus in front of the retina, creating myopic defocus. This can, to some extent, inhibit the elongation of the eye axis and effectively alleviate or even treat myopia.

[0101] Example 1

[0102] This embodiment provides a method for displaying defocused patterns, referring to... Figure 2 .

[0103] The method for displaying the defocused pattern includes:

[0104] A first critical target image is obtained and presented based on an adjustable first target image; the first critical target image includes adjusting the first light intensity of the first target image until it reaches a first critical condition to obtain the first critical target image.

[0105] The first target image is at least partially formed by an electrically powered first light source, the first light source including first light of a first color. Furthermore, when the first target image is displayed, the LEDs that together constitute and display the first target image will display the first color.

[0106] The first visual target image is projected as a first image onto the observer's eye. The observer continuously observes the first visual target image from a predetermined distance. The first critical condition includes a gradual increase in the brightness of the first visual target image until the first image falls on the observer's retina. This first visual target image is the first critical visual target image. During this brightness change, the observer continues to observe the first visual target image until the edges of the first visual target image are clearly and sharply visible, thus obtaining the first critical visual target image specific to that observer. The observer can determine the first critical visual target image based on their own viewing experience. Furthermore, the gradual increase in the brightness of the first visual target image includes increasing the current flowing through the first light source. By increasing the brightness, the edges of the first visual target image are made to fall on the observer's retina, thus determining the first critical visual target image suitable for the observer's viewing.

[0107] The preset distance is 3-5m, and the first visual target image is arranged within the observer's 0-5° field of view. Setting the preset distance aims to provide conditions for myopic defocus induced by axial chromatic aberration in the human eye. Because in near-vision scenarios, the focal point falls slightly behind the retina, resulting in less accommodative force being used than needed—a phenomenon known as accommodative lag—which causes or exacerbates myopia. Even when using axial chromatic aberration to stimulate lens accommodation and suppress axial elongation in near-vision scenarios, the negative effects of accommodative lag still outweigh the positive effects of axial chromatic aberration. Therefore, it is necessary to control the observer to view at a relatively far distance, specifically 3-5m. The field of view of the presented image is set so that the first and second images fall at the center of the eyeball, which is beneficial for stimulating the lens's accommodative function.

[0108] A second critical target image is obtained based on an adjustable second target image. The second critical target image is presented while the first critical target image is presented. The second critical target image includes adjusting the second brightness of the second target image until it reaches a second critical condition while the first critical target image is in the display state.

[0109] The second target image is at least partially formed by an electrically powered second light source, the second light source including second light of a second color. Furthermore, when the second target image is displayed, the LEDs that together constitute and display the first target image will display a first color.

[0110] The second critical condition includes that when the observer continuously observes the first critical target image at a preset distance from the first image, the second brightness of the second target image gradually increases until the edge of the first image is at a critical position about to leave the observer's retina. The second target image at this point is the second critical target image. During the change in the second brightness, the observer continues to observe the first critical target image until its edge sharpness is about to decrease; the corresponding second target image is then the second critical target image. In adjusting the brightness of the second target image, the observer can determine the second critical target image based on their own situation, resulting in a targeted imaging image that better suits their individual needs for adjustment. Furthermore, the gradual increase in the second brightness of the second target image includes increasing the current flowing through the second light source to determine the second critical target image at which the first critical image is about to leave the observer's retina. By increasing the second brightness, the distance between the focal point of the second target image and the retina is lengthened, thereby increasing the degree of myopic defocus and suppressing axial elongation.

[0111] The preset distance is 3-5m, and the first target image is arranged within the observer's 0-5° field of view area.

[0112] The center wavelength of the first visual target image is greater than the center wavelength of the second visual target image, and the difference between them is at least 50 nm. This arrangement ensures that the images formed by the first primary color and the second primary color fall at different positions in the eye. When the light of the first primary color and the light of the second primary color enter the eyeglasses, if the longer wavelength light falls on the retina, then the shorter wavelength light will fall in front of the retina, thus providing the necessary conditions for myopia defocus.

[0113] For example, a first visual target image is displayed using a first light source. While the observer continuously observes the first visual target image, the current flowing through the first light source is continuously increased until the observer can clearly observe the edge of the first visual target image with a field of view angle within the range of 0-5° at a distance of 3-5m. The change in the first brightness is then stopped, and the first visual target image at this point is defined as the first critical visual target image. Simultaneously, a second visual target image is displayed using a second light source. While the observer continuously observes the first critical visual target image, the current flowing through the second light source is continuously increased to enhance the second brightness until the edge of the first critical visual target image seen by the observer begins to blur. The change in the second brightness is then stopped, and the second visual target image at this point is defined as the second critical visual target image. Increasing the second brightness aims to enhance the stimulation of the first critical visual target image by the second visual target image. The second visual target image and the first critical visual target image form an axial chromatic aberration. Increasing the brightness of the second visual target image can increase the degree of myopic defocus, thereby inhibiting axial elongation and alleviating or even treating myopia.

[0114] Furthermore, in addition to adjusting the brightness of the first target image and / or the second target image by improving the current flowing through the first light source and / or the second light source as mentioned above, the following adjustment methods are also included.

[0115] like Figure 3 As shown, in a natural environment, the human eye tends to focus green light at the macula of the fovea, blue light 3 in front of the retina, and red light 2 behind the retina. Based on this, to generate sufficient myopic defocus stimulation, such as... Figure 4 As shown, by increasing the brightness of red light while decreasing the brightness of blue light, the focus of red light 2 is induced to be focused on the macula of the fovea of ​​the retina, while the focus of blue light 3 and green light will be located in front of retina 1, thereby generating a force that pulls the retina forward, so as to inhibit or even shorten the axial length of the eye, thereby slowing down the degree of myopia.

[0116] The first target image comprises multiple pixels, wherein at least some pixels include attribute values ​​of the three primary optical colors RGB, wherein the attribute value of R is greater than the attribute values ​​of G and B. The first brightness of the first target image is adjusted by increasing the R value while maintaining the G and B values. The second brightness of the second target image is adjusted by increasing the B value while maintaining the R and G values ​​unchanged. This method facilitates the adjustment of the brightness of the first and second target images.

[0117] Furthermore, in the first target image, at least some pixels have G and B attribute values ​​of 0; in the second target image, at least some pixels have R and G attribute values ​​of 0. Specifically, the initial R, G, and B values ​​of the first target image are all 0. As the observer continuously observes the first target image, the R value of the first target image is continuously increased to improve the first brightness until the observer can clearly observe the edge of the first target image with a field of view angle of 0-5° at 3-5m. The change in the first brightness then stops, and the first target image at this point is defined as the first critical target image. Simultaneously with the display of the first target image, a second target image is displayed. The initial R, G, and B values ​​of the second target image are all 0. As the observer continuously observes the first critical target image, the B value of the second target image is continuously increased to improve the second brightness until the edge of the first critical target image seen by the observer begins to blur. The change in the second brightness then stops, and the second target image at this point is defined as the second critical target image. By increasing the brightness of the red light produced by the first optotype image in the above manner so that the focus of the red light falls on the observer's retina, and increasing the brightness of the blue light produced by the second optotype image, the aim is to increase the distance between the focus of the second optotype image in the eye and the retina, thereby enhancing the myopia defocus stimulation, which can inhibit axial elongation and alleviate or even treat myopia.

[0118] Furthermore, this method is targeted to adjust the first and second brightness according to the different eye conditions of different observers, so that the displayed image is personalized to the individual circumstances of the observer.

[0119] Example 2

[0120] This embodiment provides a display device for defocused patterns.

[0121] The display device for the defocused pattern includes a first display adjustment module and a second display adjustment module.

[0122] The first display adjustment module obtains and presents a first critical target image based on an adjustable first target image; the first critical target image includes adjusting the first brightness of the first target image until it reaches a first critical condition to obtain the first critical target image.

[0123] The specific details of the first target image, the first critical target image, the first critical condition, and the adjustment method for the first target image are the same as those in Embodiment 1, and will not be repeated here.

[0124] The second display adjustment module obtains a second critical target image based on an adjustable second target image, and presents the second critical target image while presenting the first critical target image. The second critical target image includes adjusting the second brightness of the second target image until it reaches a second critical condition while the first critical target image is in the display state, thereby obtaining the second critical target image.

[0125] The specific details of the second target image, the second critical target image, the second critical condition, and the adjustment method for the second target image are the same as those in Example 1, and will not be repeated here.

[0126] The center wavelength of the first target image is greater than the center wavelength of the second target image, and the difference between the two is at least 50 nm.

[0127] When an observer observes the first critical image, the brightness of the second optotype image is adjusted to enhance the myopic defocus stimulation. This is achieved by shifting the focus of the second optotype image in front of the retina and away from it, while the first critical image is on the retina. This enhances the myopic defocus stimulation, creating a tendency for the retina to shift forward. This can inhibit the elongation of the axial length of the eye or even shorten it, and alleviate or reduce the degree of myopia in the observer.

[0128] Example 3

[0129] This embodiment provides a display system for defocused patterns, referring to... Figure 5 .

[0130] The defocused pattern display system includes a display and a controller.

[0131] A display for displaying a defocused pattern, the defocused pattern including a first target image and a second target image.

[0132] A controller, connected to the display, controls the display state of the display. The controller includes a first adjustment module and a second adjustment module. The first adjustment module adjusts and controls the first target image, which is then displayed on the display; the second adjustment module adjusts and controls the second target image, which is also displayed on the display.

[0133] A first critical target image is obtained and presented based on an adjustable first target image; the first critical target image includes adjusting the first brightness of the first target image until it reaches a first critical condition to obtain the first critical target image.

[0134] The specific details of the first target image, the first critical target image, the first critical condition, and the adjustment method for the first target image are the same as those in Embodiment 1, and will not be repeated here.

[0135] A second critical target image is obtained based on an adjustable second target image. The second critical target image is presented while the first critical target image is presented. The second critical target image includes adjusting the second brightness of the second target image until it reaches a second critical condition while the first critical target image is in the display state.

[0136] The specific details of the second target image, the second critical target image, the second critical condition, and the adjustment method for the second target image are the same as those in Example 1, and will not be repeated here.

[0137] The center wavelength of the first target image is greater than the center wavelength of the second target image, and the difference between the two is at least 50 nm.

[0138] When an observer observes the first critical image, the brightness of the second optotype image is adjusted to enhance the myopic defocus stimulation. This is achieved by shifting the focus of the second optotype image in front of the retina and away from it, while the first critical image is on the retina. This enhances the myopic defocus stimulation, creating a tendency for the retina to shift forward. This can inhibit the elongation of the axial length of the eye or even shorten it, and alleviate or reduce the degree of myopia in the observer.

[0139] 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 display device for a defocused pattern, comprising: The first display adjustment module obtains and presents a first critical target image based on an adjustable first target image; The first critical target image includes adjusting the first brightness of the first target image until it reaches a first critical condition to obtain the first critical target image; The first visual target image is presented as a first image on the observer's eye; the observer continuously observes the first visual target image at a preset distance from it; The first critical condition includes a first brightness of the first target image changing from small to large until the first image falls on the observer's retina; The second display adjustment module obtains a second critical target image based on an adjustable second target image. It presents the second critical target image simultaneously with the first critical target image. The second critical target image is obtained by adjusting the second brightness of the second target image until it reaches a second critical condition while the first critical target image is in display mode. The second critical condition includes the following: when the observer continuously observes the first critical target image at a preset distance from the first target image, the second brightness of the second target image changes from small to large until the edge of the first image is at a critical position about to leave the observer's retina; the center wavelength of the first target image is greater than the center wavelength of the second target image, and the difference between them is at least 50 nm.

2. The display device for a defocused pattern according to claim 1, characterized in that, The preset distance is 3-5m.

3. The display device for a defocused pattern according to claim 2, characterized in that, The first and second target images are arranged within the 0-5° field of view of the observer.

4. The display device for a defocused pattern according to claim 3, characterized in that, The first target image is formed at least partially by an electrically powered first light source; The brightness of the first target image changes from small to large by increasing the current flowing through the first light source.

5. The display device for a defocused pattern according to claim 4, characterized in that, The second target image is formed at least partially by an electrically powered second light source; The brightness of the second target image changes from small to large by increasing the current flowing through the second light source.

6. The display device for a defocused pattern according to claim 2, characterized in that, The first target image includes a plurality of pixels, wherein at least some of the pixels include attribute values ​​of the three primary optical colors RGB, wherein the attribute value of R is greater than the attribute values ​​of G and B; The second target image includes a plurality of pixels, wherein at least some of the pixels include attribute values ​​of the three primary optical colors RGB, wherein the attribute value of B is greater than the attribute values ​​of R and G.

7. The display device for a defocused pattern according to claim 6, characterized in that, Adjusting the first brightness of the first target image involves increasing the R value while keeping the G and B values ​​constant.

8. The display device for a defocused pattern according to claim 7, characterized in that, Adjusting the second brightness of the second target image involves increasing the B value while keeping the R and G values ​​constant.

9. A display device for a defocused pattern according to any one of claims 5-7, characterized in that, The G and B attribute values ​​of at least some pixels in the first target image are 0; The R and G attribute values ​​of at least some pixels in the second target image are 0.

10. A display system for defocused patterns, characterized in that, include: A display showing a defocused pattern, the defocused pattern including a first target image and a second target image; A controller, connected to the display, for controlling the display state of the display; The controller includes a first adjustment module, which obtains and presents a first critical target image based on an adjustable first target image; The first critical target image includes adjusting the first brightness of the first target image until it reaches a first critical condition to obtain the first critical target image; The first visual target image is presented as a first image on the observer's eye; the observer continuously observes the first visual target image at a preset distance from it; the first critical condition includes a first brightness of the first visual target image changing from small to large until the first image falls on the observer's retina; and The second adjustment module obtains a second critical target image based on an adjustable second target image. It presents the second critical target image simultaneously with the first critical target image. The second critical target image includes the following: while the first critical target image is displayed, the second brightness of the second target image is adjusted until it reaches a second critical condition. The second critical condition includes: when the observer continuously observes the first critical target image at a preset distance from the first target image, the second brightness of the second target image changes from small to large until the edge of the first image is at a critical position about to leave the observer's retina; the center wavelength of the first target image is greater than the center wavelength of the second target image, and the difference between them is at least 50 nm.

11. A display system for a defocused pattern according to claim 10, characterized in that, The preset distance is 3-5m.

12. The display system for a defocused pattern according to claim 11, characterized in that, The first and second target images are arranged within the 0-5° field of view of the observer.

13. The display system for a defocused pattern according to claim 12, characterized in that, The first target image is formed at least partially by an electrically powered first light source; The brightness of the first target image changes from small to large by increasing the current flowing through the first light source.

14. A display system for a defocused pattern according to claim 13, characterized in that, The second target image is formed at least partially by an electrically powered second light source; The brightness of the second target image changes from small to large by increasing the current flowing through the second light source.

15. A display system for a defocused pattern according to claim 11, characterized in that, The first target image includes a plurality of pixels, wherein at least some of the pixels include attribute values ​​of the three primary optical colors RGB, wherein the attribute value of R is greater than the attribute values ​​of G and B; The second target image includes a plurality of pixels, wherein at least some of the pixels include attribute values ​​of the three primary optical colors RGB, wherein the attribute value of B is greater than the attribute values ​​of R and G.

16. The display system for a defocused pattern according to claim 15, characterized in that, Adjusting the first brightness of the first target image involves increasing the R value while keeping the G and B values ​​constant.

17. A display system for a defocused pattern according to claim 16, characterized in that, Adjusting the second brightness of the second target image involves increasing the B value while keeping the R and G values ​​constant.

18. A display system for a defocused pattern according to any one of claims 15-17, characterized in that, The G and B attribute values ​​of at least some pixels in the first target image are 0; The R and G attribute values ​​of at least some pixels in the second target image are 0.

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