Eye protection display screen and eye protection display equipment

Abstract

The utility model provides an eye protection display screen and eye protection display equipment, and relates to the technical field of optics. The eye protection display screen comprises a micro-display module which directly faces a light incident film and is used for generating a light signal carrying a display image; the light incident film is arranged at the position, close to the edge, of the light guide plate and used for coupling the light signals from the micro display module into the light guide plate; the light guide plate is constructed to enable the light signal coupled into the light incident film to be propagated in a total reflection manner in the light guide plate; the display film is arranged on the light guide plate and is used for coupling out the light signal propagating in the light guide plate in a parallel light form so as to display a display image generated by the micro display module on an image plane focused at infinity; and the backlight plate is arranged on the back side of the light emitting side of the light guide plate opposite to the display film, is made of a light-proof material and is larger than or equal to the display film in size. According to the scheme, the focal length of the display picture is adjusted to infinity, so that the eye muscles are in a relaxed state when a user watches a screen, the user is not prone to fatigue, and eyestrain and myopia risks are effectively reduced.

Description

Technical Field

[0001] This application relates to the field of optical technologies, and more particularly, to an eye-protecting display screen and an eye-protecting display device. Background Art

[0002] In the digital age, facing electronic screens for a long time has become a normal part of daily life. However, the resulting visual health problems are becoming increasingly prominent, especially the increased risk of eye fatigue and myopia. Therefore, it is particularly important to develop more eye-protecting display screen technologies. Among them, the eye-protecting display screen aims to optimize the display technology to reduce the adverse effects of light on the eyes and improve visual comfort.

[0003] Currently, there are already various eye-protecting display screen technologies on the market. Among them, the more common one is to adjust the amount of blue light emitted by the screen through software algorithms to reduce the potential harm of blue light to the retina. In addition, some display screens adopt special backlight module designs, such as using diffusive materials or microlens arrays to disperse light to achieve uniform illumination and reduce glare. However, although these technologies can relieve eye fatigue to a certain extent, there are still relatively high risks of eye fatigue and myopia when users view the screen for a long time. Utility Model Content

[0004] To solve the above problems, this application provides an eye-protecting display screen, which adjusts the focal length of the display image to infinity, so that the eye muscles are in a relaxed state when the user views the screen, not easily fatigued, and effectively reduces the risks of eye fatigue and myopia.

[0005] This application is implemented as follows:

[0006] In a first aspect, this application provides an eye-protecting display screen, which includes a microdisplay module, a light-incoupling film, a light guide plate, a display film, and a backlight plate, where: The microdisplay module, facing the light-incoupling film, is used to generate an optical signal carrying a display image; The light-incoupling film is disposed at a position close to the edge of the light guide plate and is used to couple the optical signal from the microdisplay module into the light guide plate; The light guide plate is configured to make the optical signal coupled into by the light-incoupling film totally reflect and propagate therein; The display film is disposed on the light guide plate and is used to couple out the optical signal propagating in the light guide plate in the form of parallel light to display the display image generated by the microdisplay module on an image plane focused at infinity; The backlight plate is disposed on the back side of the light-emitting side of the light guide plate facing the display film, and the backlight plate is made of an opaque material, and its size is greater than or equal to the size of the display film.

[0007] In some implementations, the light-incoupling film and the display film are formed by laminating a holographic grating disposed on a light guide plate. The holographic grating is formed by exposing stripes generated by the interference of two coherent light beams on an exposure substrate with a holographic material: one light beam irradiates the holographic material vertically, and the other light beam irradiates at an angle not less than the total reflection angle; the light-incoupling film couples image light into the light guide plate at an angle not less than the total reflection angle.

[0008] In some implementations, the eye-protecting display screen further includes a turning film, and the turning film is disposed on the optical path between the light-incoupling film and the display film.

[0009] In some implementations, the backlight plate is a reflective film or a reflective sheet or a black plastic plate.

[0010] In some implementations, the micro-display module includes any one of an OLED chip, a micro LED chip, an SLM chip, an LCD display screen, or an LED display screen.

[0011] In some implementations, an outer screen made of a transparent material is provided on the side of the light guide plate close to the human eye, and the size of the outer screen is greater than or equal to the size of the display film.

[0012] In some implementations, the optical signal carrying the display image is transmitted and then exits from the side close to the human eye on the display film. Among them, the light-incoupling film and the display film are arranged on the same side or on different sides on the light guide plate.

[0013] In some implementations, the eye-protecting display screen is a mobile phone display screen, a computer display screen, a learning machine display screen, an advertising display screen, or a television display screen.

[0014] In a second aspect, the present application provides an eye-protecting display device, which includes a housing and the eye-protecting display screen as described in any one of the first aspect; the housing is used to encapsulate the eye-protecting display screen, and a window adapted to the display film is provided on the housing.

[0015] In some implementations, the housing is made of an opaque material, and the micro-display module and the light-incoupling film are encapsulated in the housing.

[0016] Compared with the prior art, the present application has at least the following advantages or beneficial effects:

[0017] By combining a microdisplay module, a light-incoupling film, a light guide plate, a display film, and a backlight panel, the present application constructs an eye-protecting display screen capable of outputting parallel light signals. Thus, the eye-protecting display screen can display the display image generated by the microdisplay module along an image plane focused at infinity. That is, since the light signal carrying the display image is projected towards the user in the form of parallel light, when the user looks at the display image shown on the display film, there will be a visual hyperopia effect (the picture focus is at infinity), thereby reducing the fatigue caused by the eyes focusing for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the same-side arrangement of the light-incoupling film and the display film in an embodiment of the eye-protecting display screen of the present application;

[0020] Figure 2 Oblique view of an embodiment of the eye-protecting display screen of the present application;

[0021] Figure 3 Schematic diagram of the visual hyperopia effect;

[0022] Figure 4 Schematic diagram of the same-side arrangement of the light-incoupling film and the display film in another embodiment of the eye-protecting display screen of the present application;

[0023] Figure 5 Schematic diagram of the opposite-side arrangement of the light-incoupling film and the display film in an embodiment of the eye-protecting display screen of the present application;

[0024] Figure 6 Schematic diagram of the opposite-side arrangement of the light-incoupling film and the display film in another embodiment of the eye-protecting display screen of the present application.

[0025] Reference numerals: 1, microdisplay module; 2, light-incoupling film; 3, light guide plate; 4, display film; 5, backlight panel; 6, outer screen. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Generally, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0027] Accordingly, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0028] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the various embodiments and features in the following embodiments can be combined with each other.

[0029] To facilitate understanding of the technical solutions provided by the present application, some concepts will be introduced first.

[0030] 1. Holographic grating coating

[0031] Holographic grating coating refers to adding a specific material layer on the surface or back of a holographic grating during the manufacturing process of the holographic grating. Among them, a holographic material is coated on an exposure substrate, and the holographic material is exposed by the interference fringes generated by the interference of two coherent light beams. After post-processing, a holographic grating can be obtained, and information such as the phase and amplitude of these two coherent light beams is recorded in the holographic grating. When using a light beam identical to one of the two coherent light beams to irradiate the holographic grating at the same angle, this light beam will diffract from the holographic grating at the same angle as the other coherent light beam. This property is often used in optical path design to achieve light propagation in a specific direction.

[0032] Driven by the digital wave, people's interaction time with electronic screens has increased significantly, which not only greatly enriches our lifestyle but also brings visual health challenges that cannot be ignored. Prolonged viewing of electronic screens, especially the high-energy blue light emitted by traditional displays and the uneven light distribution, has become an important factor leading to eye fatigue, dryness, and even an increased risk of myopia. Through research by the inventors, it has been found that current eye protection display technologies on the market, such as blue light adjustment software and special backlight module designs, although alleviating the problems of blue light damage and glare to a certain extent, have not fundamentally solved the eye muscle fatigue caused by long-term focusing due to the fixed image focal length.

[0033] Specifically, the image focal length of traditional displays is fixed. When users are viewing, their eyes need to continuously adjust the lens to maintain a clear visual focus. This continuous adjustment process keeps the eye muscles in a tense state for a long time, accelerating eye fatigue and potentially exacerbating the development of myopia. Therefore, the inventors have deeply realized that to truly achieve the eye protection effect, it is necessary to break through the limitations of traditional displays and explore a new display technology that can reduce the burden on eye muscles and optimize the visual experience.

[0034] Based on in-depth analysis and reflection on the prior art, this application proposes an eye-protecting display screen and an eye-protecting display device, aiming to achieve the effect of being able to display the display image generated by the micro-display module 1 on the image plane focused at infinity through the optimization of the physical structure. When the user views the screen, the eyes do not need to maintain a focused state for a long time, effectively reducing the burden on the eye muscles, reducing the risk of myopia, and improving visual comfort.

[0035] Embodiment 1:

[0036] Please refer to Figure 1-2 , the eye-protecting display screen includes a micro-display module 1, a light-incoupling film 2, a light guide plate 3, a display film 4, and a backlight plate 5, where: The micro-display module 1 is facing the light-incoupling film 2 and is used to generate an optical signal carrying the display image; The light-incoupling film 2 is arranged at a position close to the edge of the light guide plate 3 and is used to couple the optical signal from the micro-display module 1 into the light guide plate 3; The light guide plate 3 is configured to make the optical signal coupled by the light-incoupling film 2 totally reflect and propagate therein; The display film 4 is arranged on the light guide plate 3 and is used to couple out the optical signal propagating in the light guide plate 3 in the form of parallel light, so as to display the display image generated by the micro-display module 1 on the image plane focused at infinity; The backlight plate 5 is arranged on the back side of the light guide plate 3 on the light-emitting side facing the display film 4. The backlight plate 5 is made of a light-impermeable material, and its size is greater than or equal to the size of the display film 4.

[0037] In the above embodiment, by combining the micro-display module 1, the light-incoupling film 2, the light guide plate 3, the display film 4, and the backlight plate 5, a display screen capable of outputting a parallel optical signal is constructed, so that the display screen can display the display image generated by the micro-display module 1 on the image plane focused at infinity. That is, since the optical signal carrying the display image is projected onto the user in the form of parallel light, when the user looks at the display image displayed on the display film 4, there will be an effect of visual hyperopia (the picture focus is at infinity, or when the user views the screen, the visual focus felt is naturally guided to the simulated "hyperopia" state), thus reducing the fatigue caused by the eyes focusing for a long time. At the same time, the light-impermeable material and size design of the backlight plate 5 prevent light leakage and stray light interference, enhancing the user's perception of the picture brightness.

[0038] Among them, the microdisplay module 1 serves as the light source and image generator of the entire eye-protecting display screen. The microdisplay module 1 is placed opposite to the light-incoupling film 2 and is responsible for generating optical signals carrying the display image. These optical signals are the basis for forming the final display screen. The light-incoupling film 2 located at the edge of the light guide plate 3 plays a key role in efficiently coupling the optical signals generated by the microdisplay module 1 into the interior of the light guide plate 3. This process ensures that the optical signals can propagate uniformly and stably within the light guide plate 3. The light guide plate 3 utilizes the total reflection principle to enable the optical signals coupled from the light-incoupling film 2 to propagate efficiently within it. The display film 4, as a key component for outputting optical signals, can couple out the optical signals propagating within the light guide plate 3 in the form of parallel light, forming a clear and uniform display screen, achieving the effect of visual infinity.

[0039] It should be noted that the eye-protecting display screen can be a mobile phone display screen, a computer display screen, a learning machine display screen, an advertising display screen, or a television display screen. Additionally, in optics and visual perception, infinity refers to an extremely far distance such that the light can be approximately regarded as parallel when reaching the human eye. As Figure 3 shown, the closer the light emitted by the screen is to parallel light, the farther the focal point is. When the light enters the human eye in the form of parallel light, the focal point perceived by the human brain is at infinity. This perceptual ambiguity is jointly caused by the parallelism of the light direction, the limitation of the human eye's accommodation ability, and the brain's visual adaptation ability. In fact, generally when looking at objects more than 20m away, people can't feel particularly obvious changes, and the focal points seem to be in a very far place.

[0040] Among them, in visual perception, the focal point usually refers to the point where light forms a clear image on the retina. However, in actual situations, due to the accommodation function of the human eye and the processing mechanism of the brain for visual information, our perception of the focal point is not always so precise. Generally, when observing objects more than 20 meters away, since the light reflected or emitted by these objects is almost parallel, the human eye doesn't need to make much adjustment when receiving this light. Therefore, when the brain processes this visual information, it will perceive these focal points as being in a very far place. This perceptual ambiguity is caused by the parallelism of the light direction and the limitation of the human eye's accommodation ability. That is to say, in the above embodiments, the eye-protecting display screen shoots the optical signals carrying the display image in the form of parallel light towards the user. Therefore, when the user looks at the display image shown on the display film 4, they will feel that the focal point always seems to be in a very far place, achieving the effect of visual hyperopia, thus reducing the burden on the eye muscles, lowering the risk of myopia, and enhancing visual comfort.

[0041] In some embodiments of the present application, the eye-protecting display screen further includes a turning film, and the turning film is disposed on the optical path between the light-incoupling film 2 and the display film 4.

[0042] It should be noted that the size of the image emitted by the microdisplay module 1 is adapted to the size of the light-incoupling film 2. In order to reduce the volume and weight of the microdisplay module 1, a turning film (turning grating) can be added on the optical path between the light-incoupling film 2 and the display film 4 for two-dimensional pupil expansion. This turning film is arranged in the light-emitting direction of the light-incoupling film 2. After one-dimensional pupil expansion of the image of the light-incoupling film 2, it is deflected to the display film 4, and two-dimensional pupil expansion is achieved at the display film 4. The size of the display film 4 is positively correlated with the size of the light-incoupling film 2. The larger the display area, the larger the light-incoupling film 2 required. In the case of using the turning film, the sizes of the microdisplay module 1 and the light-incoupling film 2 can be significantly reduced. If the turning film is not used, the size of the display film 4 can generally be expanded to about 20 times the size of the light-incoupling film 2; while if the turning film is used, the size of the display film 4 can be significantly increased, reaching 200 times or more the size of the light-incoupling film 2.

[0043] The detailed principle of using the turning film is as follows: First, the optical signal is coupled into the light guide plate 3 through the light-incoupling film 2, and then incident on the turning film through total reflection. At this time, a part of the light will be turned to the display film 4, and the remaining light will continue to propagate forward through reflection and then be incident on the turning film again. At this time, another part of the light will be turned to the display film 4, and one-dimensional pupil expansion is achieved by repeating this process. Finally, for the optical signal transmitted to the display film 4, a part of the light will enter the human eye through the coupling out of the display film 4, and the remaining light will continue to propagate forward through reflection and then be incident on the display film 4 again. At this time, another part of the light will be transmitted into the human eye, and one-dimensional pupil expansion in the other direction is achieved by repeating this process. The combination of these two one-dimensional pupil expansions constitutes two-dimensional pupil expansion.

[0044] In some embodiments of the present application, the light-incoupling film 2 and the display film 4 are formed by laminating a holographic grating on the light guide plate 3. The holographic grating is formed by exposing stripes generated by the interference of two coherent light beams on the exposure substrate by the holographic material during production: one beam of light is perpendicularly incident on the holographic material, and the other beam of light is incident at an angle not less than the total reflection angle; the light-incoupling film 2 couples the image light into the light guide plate 3 at an angle not less than the total reflection angle.

[0045] In the above embodiments, when making the holographic grating, one of the light beams is perpendicularly incident on the holographic material, which can ensure that the display image enters the human eye as parallel light. Because in the production process of the holographic grating, this direction usually corresponds to the direction in which the light is finally expected to exit (i.e., the direction of entering the human eye). Due to the diffraction characteristics of the grating, at the display film 4, when the light is incident at a specific angle, its diffracted light will also be perpendicularly incident on the human eye, which helps to ensure that the display image enters the human eye with parallel or approximately parallel light. At the light-incoupling film 2, the light emitted perpendicularly from the microdisplay module 1 is incident on the light-incoupling film 2, and the light-incoupling film 2 diffracts this beam of light into the light guide plate 3 at an angle not less than the total reflection angle, ensuring that the image can be totally reflected and transmitted in the light guide plate 3.

[0046] In some embodiments of the present application, the backlight panel 5 is a reflective film, a reflective sheet, or a black plastic plate.

[0047] In the above embodiments, using a reflective film or a reflective sheet as the backlight panel 5 can reduce the loss of light during propagation, enabling more light to reach the display area, thereby improving the display brightness. In addition, they can also reduce light leakage into the non-display area to a certain extent and improve the display contrast. Using a reflective film or a reflective sheet as the backlight panel 5 is suitable for eye-protecting display screens that require high brightness and high contrast. The main function of the black plastic plate is to absorb light, reduce light leakage, and eliminate stray light interference. Due to its high light absorption property, black plastic can effectively absorb the light in the non-display area and prevent this light from having a negative impact on the display effect. Therefore, using a black plastic plate as the backlight panel 5 can significantly improve the display contrast because black plastic can absorb most of the stray light, allowing only the light from the display area to enter the human eye. In addition, the black plastic plate also has the advantages of low cost and easy processing. Using a black plastic plate as the backlight panel 5 is suitable for eye-protecting display screens with high contrast requirements.

[0048] It should be noted that in the actual application of the eye-protecting display screen, the material selection of the backlight panel 5 needs to be weighed according to specific display requirements and application scenarios. If high brightness and relatively high light utilization efficiency are pursued, then a reflective film or a reflective sheet may be a better choice; while if higher contrast and prevention of stray light interference are more important, then a black plastic plate may be more suitable.

[0049] In some embodiments of the present application, the microdisplay module 1 includes any one of an OLED chip, a micro LED chip, an SLM chip, an LCD display screen, or an LED display screen.

[0050] For the microdisplay module 1, its performance directly affects the image quality of the eye-protecting display screen. Therefore, an OLED chip, a micro LED chip, an SLM chip, an LCD display screen, or an LED display screen can be selected according to different application scenarios and requirements.

[0051] The advantages of selecting different types of microdisplay modules 1 are as follows:

[0052] The OLED (organic light-emitting diode) chip has characteristics such as self-luminescence, high contrast, wide viewing angle, and fast response. Each pixel point of the OLED display screen can emit light independently, so it can achieve deeper blacks and more vivid colors.

[0053] Micro LED chips are a micro-display technology based on LED technology. It shrinks LED lamp beads to the micron level and directly uses them as pixel points for display. Micro LED chips have extremely high brightness, resolution, and long lifespan, while also being able to achieve extremely low power consumption.

[0054] SLM (Spatial Light Modulator) chips are devices that can dynamically adjust the wavefront or light intensity distribution of light waves. It can modulate incident light by changing its surface structure or material properties, thereby achieving precise control of the light field. In the display field, SLM chips can be used to achieve advanced display effects such as holographic display and 3D display.

[0055] LCD (Liquid Crystal Display) screens utilize the optical properties of liquid crystal molecules to modulate the light emitted by the backlight panel 5, thereby achieving image display. LCD screens have advantages such as low cost, long lifespan, and high resolution. However, in comparison, their color saturation and contrast may be slightly inferior to OLED chips and micro LED chips.

[0056] LED displays are usually composed of a large number of LED lamp beads, and images are displayed by controlling the lighting and extinguishing of each lamp bead. LED displays have advantages such as high brightness, strong weather resistance, and being easy to be spliced into large-sized screens.

[0057] In some embodiments of the present application, an outer screen 6 made of a transparent material is provided on the side of the light guide plate 3 close to the human eye, and the size of the outer screen 6 is greater than or equal to the size of the display film 4.

[0058] In the above embodiments, by ensuring that the size of the outer screen 6 is greater than or equal to the size of the display film 4, it can be ensured that the display film 4 is completely covered, avoiding problems such as light leakage or light escape at the edge of the display area, which helps to improve the uniformity and contrast of the display. At the same time, the outer screen 6, as a layer of barrier, directly faces the user and the environment, and can effectively prevent damage to the display film 4 caused by external physical impacts, scratches, and contaminations. It is made of a transparent material with a high light transmittance, which can ensure that the light does not undergo significant attenuation or distortion when passing through. In addition, the outer screen 6 can also serve as an optical interface. Through its surface treatment and coating technology, it can further optimize the refraction, reflection, and scattering characteristics of light, thereby enhancing the display effect, such as improving brightness, contrast, and color saturation. And in some application scenarios, such as mobile devices or wearable devices, the outer screen 6 can also play a role in safety protection. When the user accidentally drops or collides the device, the outer screen 6 can absorb and disperse the impact force, reduce damage to internal components, and protect the user's eyes from flying debris.

[0059] Please refer to Figure 1 、 Figure 4 、 Figure 5 and Figure 6, in some embodiments of the present application, the optical signal carrying the display image is emitted from the side close to the human eye after being conducted on the display film 4. Among them, the light incident film 2 and the display film 4 are arranged on the same side or on different sides of the light guide plate 3.

[0060] The positional layout of the light incident film 2 and the display film 4 on the light guide plate 3 can be flexibly selected according to specific application scenarios and requirements, as long as it can ensure that the light is emitted from the side close to the human eye after effective conduction. For example, as Figure 1 and Figure 4 shown, the light incident film 2 and the display film 4 can be arranged on the same side; as Figure 5 and Figure 6 shown, the light incident film 2 and the display film 4 can also be arranged on different sides.

[0061] Embodiment 2:

[0062] An eye protection display device provided by an embodiment of the present application includes a housing and an eye protection display screen; the housing is used to encapsulate the eye protection display screen, and a window adapted to the display film 4 is provided on the housing.

[0063] Based on the eye protection display screen proposed in Embodiment 1, by encapsulating the eye protection display screen into the housing, an eye protection display device capable of protecting eyesight will be obtained. This eye protection display device can be widely applied to various scenarios that require long-term viewing of the screen, such as offices, schools, home entertainment, etc. Especially in the fields of education and mobile office, this device can effectively relieve the eye fatigue problems of students and office workers caused by long-term facing computer or mobile phone screens.

[0064] In some embodiments of the present application, the housing is made of an opaque material, and the micro-display module 1 and the light incident film 2 are encapsulated in the housing. Among them, the opaque housing can effectively block the interference of external light, enabling the internal display module to work without being affected by external light, thereby presenting clearer and more vivid images. It should be noted that in order to encapsulate the micro-display module 1 and the light incident film 2 in the opaque housing, precise installation positions need to be reserved for the micro-display module 1 and the light incident film 2 in the housing to ensure that they can be correctly aligned according to the design requirements. At the same time, appropriate fixing parts (such as screws, buckles, etc.) are used to fix the micro-display module 1 and the light incident film 2 in the housing. During the fixing process, attention should be paid to avoiding damage to the display module and ensuring its stability. In addition, in order to prevent impurities such as dust and moisture from entering the housing and affecting the performance and lifespan of the display module, the encapsulation process can be sealed. This can be achieved by applying sealant at the interface, installing sealing rings, etc.

[0065] In summary, when the traditional screen is displaying, the light often emits from a relatively close point light source or backlight panel, and enters the human eye after being reflected or transmitted by the screen. This way of light convergence will increase the adjustment burden on the eyes and cause visual fatigue. In the above embodiments, the eye protection display device projects the display image in the form of parallel light to the exit pupil position by using the eye protection display screen, so that the eye protection display device displays the display image generated by the micro display module 1 along the image plane focused at infinity, so as to reduce the eye fatigue and myopia risk caused by long-term viewing of the screen, and this problem can be avoided.

[0066] For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present application is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claimed claim.

Claims

1. An eye protection display screen, characterized in that: include: Micro display module, light incident film, light guide plate, display film and backlight plate, wherein: The micro display module is opposite to the light incident film and is used to generate a light signal carrying a display image; A light-incoming film is arranged near the edge of the light guide plate and is used to couple the optical signal from the micro display module into the light guide plate; A light guide plate, configured to allow the optical signal coupled into the light incident film to be totally reflected and propagated therein; A display film is arranged on the light guide plate and is used to couple out the optical signal propagating in the light guide plate in the form of parallel light so as to display the display image generated by the micro display module along the image plane focused at infinity; The backlight plate is arranged on the back side of the light emitting side of the light guide plate, facing the display film. The backlight plate is made of an opaque material, and its size is greater than or equal to the size of the display film.

2. The eye protection display screen according to claim 1, characterized in that: The light incident film and the display film are formed by coating a holographic grating disposed on a light guide plate. When the holographic grating is produced, it is formed by exposing a holographic material on an exposure substrate through stripes generated by the interference of two coherent light beams: one beam of light irradiates the holographic material vertically, and the other beam of light irradiates at an angle not less than the total reflection angle; the light incident film couples the image light into the light guide plate at an angle not less than the total reflection angle.

3. The eye protection display screen according to claim 1, characterized in that: It also includes a turning film, which is arranged on the light path between the light incident film and the display film.

4. The eye protection display screen according to claim 1, characterized in that: The backlight plate is a reflective film or a reflective sheet or a black plastic plate.

5. The eye protection display screen according to claim 1, characterized in that: The micro display module includes any one of an OLED chip, a micro LED chip, an SLM chip, an LCD display screen or an LED display screen.

6. The eye protection display screen according to claim 1, characterized in that: An outer screen made of a transparent material is provided on the side of the light guide plate close to the human eye, and the size of the outer screen is greater than or equal to the size of the display film.

7. The eye protection display screen according to any one of claims 1 to 6, characterized in that: The optical signal carrying the display image is transmitted and emitted from the side close to the human eye on the display film, wherein the light incident film and the display film are arranged on the light guide plate on the same side or on different sides.

8. The eye protection display screen according to claim 7, characterized in that: The eye protection display screen is a mobile phone display screen, a computer display screen, a learning machine display screen, an advertising display screen or a television display screen.

9. An eye protection display device, characterized in that: It comprises a shell and an eye protection display screen as described in any one of claims 1 to 7; the shell is used to encapsulate the eye protection display screen, and a window adapted to the display film is provided on the shell.

10. The eye protection display device according to claim 9, characterized in that: The shell is made of an opaque material, and the micro display module and the light incident film are packaged in the shell.

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