Space optical long-range device

Abstract

The application provides a space optical long-range viewing device, comprising: a magnifying imaging light path, a display device and a support assembly, wherein the magnifying imaging light path is used for adjusting the direction of at least part of image light rays emitted by the display device, so that the image light rays are incident to a corresponding eyebox region of the space optical long-range viewing device, so that when the user's eyes are in the eyebox region, the user sees a magnified virtual image corresponding to the content displayed by the display device; the support assembly is used for supporting the magnifying imaging light path; and the display device is detachably connected with the support assembly. The application supports two image sources of a book and the display device.

Description

Technical Field

[0001] This application relates to the field of optical magnification technology, and more particularly to a space optical telescope. Background Technology

[0002] Space optical telescopic devices, such as reading and writing stations, typically present the content of an image source to the user as a magnified virtual image through an optical magnification imaging path. They are used in education, office work, and entertainment. These devices are designed to provide a viewing experience at long distances to reduce eye strain.

[0003] However, existing reading and writing desks have the following drawbacks: traditional reading and writing desks are only designed for optically magnifying physical books, or only support the display of electronic screens (which are integrated into the housing). This results in functional defects in each of them. For example, reading and writing desks cannot meet the needs of using electronic devices, using AI, or taking online classes, while devices with electronic screens, such as far-viewing screens, are not eye-friendly. Buying two devices is costly and takes up a lot of space. Utility Model Content

[0004] This application aims to solve at least one of the technical problems existing in the prior art, and proposes a space optical telescope.

[0005] To achieve the above objectives, this application provides a space optical telescope, comprising: a magnifying imaging optical path, a display device, and a support assembly. The magnifying imaging optical path is used to adjust the direction of at least a portion of the image light emitted from the display device, so that the image light is incident on the eye box area corresponding to the space optical telescope, so that when the user's eye is in the eye box area, he / she sees a magnified virtual image corresponding to the content displayed by the display device.

[0006] The support assembly is used to support the magnified imaging optical path;

[0007] The display device is detachably connected to the support assembly.

[0008] In some embodiments, the display device includes a liquid crystal display panel and a backlight module, wherein the ratio of the blue light energy in the 400nm to 500nm band to the total visible light energy in the 400nm to 780nm band of the spectrum emitted by the backlight module is R, and 15%≤R≤25%, or 18%≤R≤22%.

[0009] In some embodiments, the blue light energy in the 400nm to 455nm band accounts for less than or equal to 40% of the blue light energy in the 400nm to 500nm band.

[0010] In some embodiments, the display device includes a liquid crystal display panel, a backlight module, and a driving module, wherein the driving module is used to turn off or reduce the brightness of all blue sub-pixels output by the liquid crystal display panel and dynamically increase the brightness of red and green sub-pixels when preset conditions are met.

[0011] In some embodiments, the preset condition is at least one of the following:

[0012] The system time has reached the preset nighttime period;

[0013] Users manually activate eye protection mode;

[0014] The ambient light sensor of the display device detects that the ambient brightness is lower than a preset brightness threshold.

[0015] In some embodiments, the driving module is further configured to dynamically increase the brightness of the red and green sub-pixels based on a preset color and brightness mapping model; the color and brightness mapping model is configured to map the original RGB input signal into an adjusted RG signal output in the absence of blue light, so that the color and brightness of the liquid crystal display panel approximate the target color and brightness.

[0016] In some embodiments, the display device includes a reflective display panel, the reflective display panel including an electrically conductive microcapsule layer configured to change the distribution of microparticles under the action of an electric field to achieve display.

[0017] In some embodiments, the display device includes a liquid crystal display panel and a backlight module, wherein the light emitted by the backlight module is full-spectrum light, the spectral continuity index of the full-spectrum light is Cs, and Cs≥50%, wherein Cs is the ratio of the overlapping area of ​​the spectral energy distribution of the test light source and the standard light source in the wavelength range of 400nm to 780nm to the total spectral area of ​​the standard light source.

[0018] In some embodiments, the backlight module includes a backlight source, the backlight source includes a long-wavelength blue LED chip and a hybrid fluorescent material, the hybrid fluorescent material is disposed in the optical path of the backlight module and configured to be excited by the long-wavelength blue light emitted by the long-wavelength blue LED chip to generate full-spectrum light; the center wavelength of the long-wavelength blue light is in the range of 440nm to 475nm.

[0019] In some embodiments, the hybrid fluorescent material includes quantum dot material and / or narrowband phosphor, wherein the quantum dot material includes at least two types of quantum dots, wherein the emission peak of the first quantum dot is in the range of 525nm-535nm, the emission peak of the second quantum dot is in the range of 630nm-650nm, and the narrowband phosphor includes at least narrowband green phosphor and narrowband red phosphor.

[0020] In some embodiments, the quantum dot material further includes supplementary materials, which include quantum dots or phosphors with emission peaks in the range of 480nm-510nm;

[0021] or,

[0022] The quantum dot material also includes a third quantum dot, which, like the first quantum dot, is a green quantum dot. The diameter of the third quantum dot is smaller than that of the first quantum dot, and the emission peak of the third quantum dot is at 520nm ± 5nm.

[0023] In some embodiments, the quantum dot material comprises a quantum dot enhancement film independent of the long-wavelength blue LED chip, or the quantum dot material comprises quantum dots encapsulated on the long-wavelength blue LED chip.

[0024] In some embodiments, the display device includes a liquid crystal display panel, the liquid crystal display panel includes color filters, and the thickness of the red, green and blue color filters is in the range of 0.8µm to 1.9µm.

[0025] In some embodiments, the thickness of the color filter is configured such that the NTSC color gamut coverage of the liquid crystal display panel is 30% to 85%.

[0026] In some embodiments, the thicknesses of the red, green, and blue color filters are all in the range of 1.0µm to 1.9µm, and the thicknesses of the red, green, and blue color filters are configured to achieve an NTSC color gamut coverage of 70% to 90% for the liquid crystal display panel; or,

[0027] The thickness of the red, green, and blue color filters in the color filter is in the range of 0.6µm to 1.2µm, and the thickness of the red, green, and blue color filters in the color filter is configured to make the NTSC color gamut coverage of the liquid crystal display panel 30% to 70%.

[0028] In some embodiments, the screen surface of the display device is provided with a paper-like film, and the surface optical properties of the paper-like film satisfy at least one of the following conditions:

[0029] Reflectivity less than or equal to 5%;

[0030] The haze level is greater than or equal to 20% and less than or equal to 40%.

[0031] Under an incident angle of 60°, the specular gloss is less than 30 GU.

[0032] In some embodiments, the screen surface of the display device is provided with a paper-like film, and the surface optical properties of the paper-like film satisfy at least one of the following conditions:

[0033] Reflectivity less than or equal to 1%;

[0034] The haze level is greater than or equal to 40% and less than or equal to 60%.

[0035] Under an incident angle of 85°, the specular gloss is less than 5 GU.

[0036] In some embodiments, the screen surface of the display device is provided with a paper-like film, the paper-like film including a substrate and a biomimetic microstructure layer formed on the surface of the substrate, the biomimetic microstructure layer having a surface topology;

[0037] The arithmetic mean roughness of the surface topology is greater than or equal to 0.3 μm and less than or equal to 2.5 μm; and / or,

[0038] The average width of the surface topology is greater than or equal to 30 μm and less than or equal to 150 μm.

[0039] In some embodiments, the material of the biomimetic microstructure layer includes a nanoimprint adhesive cured by ultraviolet light, wherein the refractive index of the nanoimprint adhesive is greater than or equal to 1.45 and less than or equal to 1.55.

[0040] In some embodiments, the paper-like film surface is covered with an anti-reflective coating.

[0041] In some embodiments, the screen surface of the display device is provided with a paper-like film, the haze value of which is 20% to 60%.

[0042] In some embodiments, an ambient light compensation module is further included, the ambient light compensation module comprising:

[0043] Ambient lighting is provided around the liquid crystal display panel of the display device;

[0044] An ambient light sensor is used to detect ambient brightness; and

[0045] The control unit is connected to the ambient light and the ambient light sensor, and is used to adjust the brightness of the ambient light according to the ambient brightness and the display brightness of the display device.

[0046] In some embodiments, the control unit is further configured to maintain the ratio of the display brightness of the display device to the ambient brightness between 1:3 and 3:1.

[0047] In some embodiments, the control unit is further configured to calculate the target brightness Lstrip of the ambient light using the following formula:

[0048] Lstrip = K·(Lscreen / Lenv)

[0049] Where K is the calibration coefficient, Lscreen is the display brightness of the display device, and Lenv is the ambient brightness.

[0050] In some embodiments, a color processing unit is further included for performing dynamic adaptive color mapping, including:

[0051] Establish the native color gamut boundary model of the liquid crystal display panel of the display device;

[0052] Dynamically generate the optimal display color gamut based on the input image content;

[0053] Perform color mapping that preserves hue, compresses saturation, and links brightness.

[0054] In some embodiments, the magnified imaging optical path includes a fill light and a control unit. The fill light is used to provide supplemental lighting to the image source placement area corresponding to the magnified imaging optical path. The support assembly is provided with a first connection part for electrical connection with the display device. The display device is provided with a second connection part that cooperates with the first connection part. The control unit is electrically connected to the first connection part and the fill light. When the control unit detects that the display device is connected to the support assembly, it adjusts the brightness of the fill light.

[0055] In some embodiments, the display device includes a display panel, the display panel including a plurality of pixels, at least some of the pixels having a first emission range and a second emission range, the first emission range being a space within a preset cone angle range of the main optical axis; the second emission range being a space outside the preset cone angle range;

[0056] The light emission energy of the pixel in the first emission range is greater than the light emission energy in the second emission range.

[0057] In some embodiments, the preset cone angle range is less than or equal to ±45°; or, the preset cone angle range is ±35°, or the preset cone angle range is ±20°.

[0058] In some embodiments, the display device includes a display panel, wherein the proportion of light energy emitted by the display panel in the first emission range to the total energy is a first proportion, and the proportion of light energy emitted by the display panel in the second emission range to the total energy is a second proportion, wherein the ratio of the second proportion to the first proportion is 0.3:1, or the ratio of the second proportion to the first proportion is 0.2:1.

[0059] In some embodiments, the display device includes a display panel and a privacy shield, the privacy shield being disposed on the light-emitting side and / or the backlight side of the display panel;

[0060] The privacy screen structure includes an optical film and a microstructure array disposed on the optical film. The microstructure array includes a plurality of light-absorbing grids spaced apart, with a gap between two adjacent light-absorbing grids for light to pass through, and light incident on the light-absorbing grids is absorbed.

[0061] In some embodiments, the display device includes at least two privacy structures, wherein light-absorbing grilles in the microstructure array of one privacy structure are spaced apart along a first direction, and light-absorbing grilles in the microstructure array of the other privacy structure are spaced apart along a second direction, wherein the first direction and the second direction are perpendicular to each other.

[0062] In some embodiments, the display device further includes a backlight module, the backlight module including a light source array, the light source array including at least two light source zones, the brightness of different light source zones being independently adjustable, and each light source zone including at least one light source.

[0063] In some embodiments, at least one prism film is further included, the surface of which is provided with a triangular prism structure, wherein the vertex angle of the triangular cross-section of the triangular prism structure is greater than or equal to 90° and less than or equal to 110°.

[0064] In some embodiments, the display device further includes a backlight module, which includes a light source and a light-diffusing sheet, wherein light emitted from the light source passes through the light-diffusing sheet and is incident on the display panel or a prism film.

[0065] In some embodiments, a collimating element array is further disposed between the light source and the light homogenizer. The light source includes a plurality of LEDs, and each LED corresponds one-to-one with a collimating element in the collimating element array. The distance between the light-emitting surface of the collimating element array and the light-incident surface of the light homogenizer ranges from 2 mm to 10 mm.

[0066] In some embodiments, the collimating element array includes at least one of a plano-convex lens, a biconvex lens, a TIR lens, or a reflector.

[0067] In some embodiments, the light source includes a blue Mini LED lamp and a quantum dot material for converting the blue light emitted by the blue Mini LED lamp into white light, the quantum dot material being disposed between the light homogenizer and the display panel.

[0068] In some embodiments, the backlight module further includes a red-green reflective film disposed between the light-diffusing sheet and the quantum dot material; and / or, the backlight module further includes a BEF film and / or a DBEF film disposed between the display panel and the quantum dot material.

[0069] In some embodiments, the light source includes a white LED lamp; the backlight module further includes a BEF film and / or a DBEF film disposed on the collimating element array away from the light source.

[0070] In some embodiments, the display device further includes a backlight module, the backlight module comprising:

[0071] Light guide plate;

[0072] A light source is disposed on the light-incident side of the light guide plate;

[0073] A coupling structure is disposed between the light source and the light-incident side of the light guide plate, and is used to collimate the light emitted by the light source into the light guide plate;

[0074] The light-collecting dots formed on the light-emitting surface of the light guide plate are wedge-shaped structures. The wedge-shaped structure has an intersecting first surface and a second surface. The angle between the first surface and the light-emitting surface of the light guide plate is a first angle, and the angle between the second surface and the light-emitting surface of the light guide plate is a second angle. The first angle is less than or equal to the second angle.

[0075] In some embodiments, the coupling structure includes a collimating element array, the light source includes a plurality of LEDs, and the LEDs correspond one-to-one with the collimating elements in the collimating element array. The distance between the light-emitting surface of the collimating element array and the light-incident surface of the light guide plate is less than 2 mm.

[0076] In some embodiments, the angle between the light-incident surface and the light-exit surface of the light guide plate is greater than or equal to 30° and less than or equal to 40°; and / or, the width of the collimated beam emitted from the coupling structure is greater than or equal to the thickness of the light guide plate; and / or, the second angle is greater than or equal to 80° and less than or equal to 90°.

[0077] In some embodiments, the backlight system further includes a direction deflection film disposed on the light-emitting side of the light guide plate, used to adjust the direction of the light emitted through the light-collecting dots to be perpendicular to the light-emitting surface of the light guide plate.

[0078] In some embodiments, the wedge angle of the direction deflection film is greater than or equal to 40° and less than or equal to 50°.

[0079] Other objects and features of this application will become clear from reading the specification, claims and drawings. Attached Figure Description

[0080] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0081] Figure 1 This is an overall structural diagram of the space optical telescope provided in the embodiments of this application;

[0082] Figure 2 This is an optical path diagram of the first optical path structure used in the embodiments of this application;

[0083] Figure 3 This is an optical path diagram of the second optical path structure used in the embodiments of this application;

[0084] Figure 4 This is the optical path diagram of the third optical path structure used in the embodiments of this application;

[0085] Figure 5 This is the optical path diagram of the fourth optical path structure used in the embodiments of this application;

[0086] Figure 6A This is a curve comparison between the emission spectrum of the liquid crystal display panel in this embodiment and the light source spectrum of the internationally recognized D65 standard;

[0087] Figure 6B This is a curve comparing the light source spectrum of this application with that of conventional technologies;

[0088] Figure 7 A comparison diagram of the backlight spectrum of this application and a conventional screen is shown;

[0089] Figure 8 This is a normalized transmission spectrum curve of the red, green, and blue filters in this application;

[0090] Figure 9 This is a schematic diagram of the first structure of the supplementary lighting used in the embodiments of this application;

[0091] Figure 10 This is a schematic diagram of a second structure of the supplementary lighting used in an embodiment of this application;

[0092] Figure 11 This is a structural diagram of the support assembly of the space optical telescope provided in the embodiments of this application;

[0093] Figure 12 This is a schematic diagram of a first example of the first connecting part and the second connecting part used in the embodiments of this application;

[0094] Figure 13 This is a partial cross-sectional view of the support assembly used in the embodiments of this application at the first connection portion;

[0095] Figure 14 This is a partial cross-sectional view of the housing of the display device used in the embodiments of this application at the second connection portion;

[0096] Figure 15 yes Figure 13 and Figure 14 A partial cross-sectional view of the support assembly and display device when the first and second connecting parts are electrically connected;

[0097] Figure 16 This is a schematic diagram of the light emission range of at least some pixels of the display device used in the embodiments of this application;

[0098] Figure 17 This is a schematic diagram of the light path when a large-angle light ray directly enters the eye of an observer or bystander;

[0099] Figure 18 This is a schematic diagram of the prism film used in the embodiments of this application;

[0100] Figure 19 This is a schematic diagram of a direct-lit backlight module used in an embodiment of this application;

[0101] Figure 20 This is another schematic diagram of the direct-lit backlight module used in the embodiments of this application;

[0102] Figure 21 This is a schematic diagram of the biconvex lens and LED light used in the embodiments of this application;

[0103] Figure 22 This is a schematic diagram of a single collimating element of a biconvex lens and an LED lamp used in an embodiment of this application;

[0104] Figure 23 This is a schematic diagram of the TIR lens, etc., used in the embodiments of this application;

[0105] Figure 24 This is a schematic diagram of the reflector cup, etc. used in the embodiments of this application;

[0106] Figure 25 This is a schematic diagram of the blue Mini LED lamp, quantum dot materials, etc. used in the embodiments of this application;

[0107] Figure 26 This is a schematic diagram of the white LED lamp, BEF film, and DBEF film used in the embodiments of this application;

[0108] Figure 27 This is a schematic diagram of the side-lit backlight module used in the embodiments of this application;

[0109] Figure 28 This is a schematic diagram of the wedge-shaped structure of the light-collecting dots of the light guide plate used in the embodiments of this application;

[0110] Figure 29 This is a schematic diagram of the light-collecting dots on the light-emitting surface of the light guide plate used in the embodiments of this application;

[0111] Figure 30 This is the optical path diagram of the upper beam and lower beam in the light guide plate used in the embodiments of this application;

[0112] Figure 31 This is a schematic diagram of the light guide plate and the direction deflection film used in the embodiments of this application;

[0113] Figure 32 This is a schematic diagram of a side-lit backlight module used in an embodiment of this application. Detailed Implementation

[0114] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0115] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0116] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0117] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0118] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0119] Please see Figure 1 This diagram illustrates the overall architecture of the space optical telescope 100 provided in this embodiment. The space optical telescope 100 provided in this embodiment includes a magnifying imaging optical path 1, a display device, and a support assembly 2 for supporting the magnifying imaging optical path 1. The display device is not included in the diagram. Figure 1 As shown in the figure. Among them, the magnified imaging optical path 1 is used to adjust the direction of at least part of the image light emitted from the display device, so that the image light is incident on the eye box area corresponding to the space optical telescope 100, so that when the user's eyes are in the eye box area, they see a magnified virtual image corresponding to the content displayed by the display device.

[0120] In some embodiments, the above-described magnified imaging optical path 1 can employ four optical path structures to achieve the above functions. The first optical path structure is as follows: Figure 2As shown, the magnified imaging optical path includes a beam splitter 12 and a curved magnifying component 11. The curved magnifying component 11 is horizontally positioned above the display device 4, and is, for example, a spherical mirror or a freeform mirror. The beam splitter 12 is positioned between the curved magnifying component 11 and the display device 4, and is, for example, a planar mirror. The beam splitter 12 transmits a portion of the image light from the display device 4 to form a first ray. The curved magnifying component 11 reflects the first ray to form a second ray, and a portion of the second ray reaches the eye box area after being reflected by the beam splitter 12. In one application scenario, the space optical telescope 100 can be placed on a table. The image source can be a book or a display screen. Taking a book as an example, the light reflected from the book, as the image light, passes through the magnified imaging optical path 1. When the user's eyes are within the eye box area, they can see a magnified virtual image of the book directly in front of them. The imaging distance of this virtual image ranges from 1 meter to 10 meters, for example, 3 meters, 5 meters, 8 meters, etc. This design allows users to read without looking down, effectively protecting their cervical spine and helping to adjust their posture. Furthermore, it effectively adjusts the focus of the user's eyes, thus protecting their vision. Other magnifying imaging optical paths 1 can also meet the same or similar usage scenarios and achieve the same or similar functions, so they will not be described in detail further.

[0121] The second type of optical path structure is as follows: Figure 3 As shown, the magnified imaging optical path includes a beam splitter 12 and a curved magnifying component 11. The curved magnifying component 11 is vertically disposed on the opposite side of the eye box area. The curved magnifying component 11 is, for example, a spherical mirror or a freeform mirror. The beam splitter 12 is disposed between the curved magnifying component 11 and the eye box area. It is, for example, a planar reflector. The beam splitter 12 is used to reflect part of the image light from the display device 4 to form a first light ray. The curved magnifying component 11 is used to reflect the first light ray to form a second light ray. A portion of the second light ray is transmitted through the beam splitter 12 and reaches the eye box area.

[0122] The third type of optical path structure is as follows: Figure 4 As shown, the magnified imaging optical path includes a freeform mirror 13 and a beam splitter 12. The freeform mirror 13 is vertically positioned opposite the eye box area. The beam splitter 12 is positioned above the display device 4 and is, for example, a planar mirror. The beam splitter 12 reflects a portion of the image light from the display device 4 to form a first ray. The freeform mirror 13 reflects this first ray to form a second ray, which then passes through the beam splitter 12 and reaches the eye box area. Compared to... Figure 3 Compared with the second type of optical path structure shown, the main difference of the third type of optical path structure is that its image source is usually a display screen built into the housing, and the distance between the image source and the beam splitting component 12 and the curved reflector 13 is smaller and more compact.

[0123] The fourth type of optical path structure is as follows: Figure 5 As shown, the magnified imaging optical path includes a first curved magnifying component 14 and a second curved magnifying component 15. The first curved magnifying component 14 is vertically disposed on the opposite side of the eye box area. The second curved magnifying component 15 is disposed above the display device 4. The second curved magnifying component 15 is used to reflect the image light from the display device 4 to form a first light ray. The first curved magnifying component 14 is used to reflect the first light ray to form a second light ray, and the second light ray directly reaches the eye box area.

[0124] In this embodiment, the display device 4 is detachably connected to the support assembly 2. Thus, regardless of the optical path structure used, two input modes are supported, corresponding to two image sources: the first is a book mode, where when a user reads a physical book placed in the corresponding area (e.g., the support surface 221 of the support assembly 2), the book is illuminated by an external light source (such as a desk lamp or ambient light), and the reflected image light enters the magnified imaging optical path 1, which "pulls back" and magnifies the book image. The other is an electronic screen mode, where the display device 4 (e.g., a tablet computer) is placed on the support surface 221. The display device 4, for example, draws power from the support assembly 2 through an electrical connection, avoiding the inconvenience of an external power cord. The display device itself emits light, and the emitted image light is directly captured and processed into a magnified virtual image by the magnified imaging optical path 1 above. The support assembly 2 is connected to the magnified imaging optical path 1, for example, through a vertical bracket 3, providing stable support for the vertical bracket 3 and the magnified imaging optical path 1.

[0125] By detachably connecting the display device 4 to the support assembly 2, users can enjoy the eye-protecting "far-view" effect while maintaining good compatibility between paper reading and e-learning without switching between different devices. This expands the device's usage scenarios and practical value, meets users' diverse learning and work needs, and achieves "one device, multiple functions."

[0126] In some embodiments, the display device includes a liquid crystal display panel and a backlight module, wherein the ratio of blue light energy in the 400nm to 500nm wavelength band to the total visible light energy in the 400nm to 780nm wavelength band emitted by the backlight module is R (defined as the percentage of blue light energy), and 15%≤R≤25%, or 18%≤R≤22%. Traditional white light emitting diode (WLED) backlighting refers to a light source that generates white light by exciting yellow phosphors with blue LED chips. This light source has a sharp blue light peak in the 415nm-455nm wavelength band, which has been proven to pose a high potential risk of photochemical damage to the retina, especially threatening children's vision health. Some existing blue light blocking technologies simply and crudely filter or reduce the entire blue light band, resulting in severe color shift (yellowish) on the screen and potentially affecting the beneficial blue light in the 460nm-500nm wavelength band necessary for regulating human circadian rhythms, causing biological clock disruption. To address this issue, this application reduces the absolute radiant energy of the entire blue light band by limiting the blue light energy in the 400nm to 500nm wavelength range to less than 25% of the total visible light energy, preferably 22%. This ensures that when the device is sufficiently bright, its blue light weighted radiance (a key physical quantity used in international standards to quantitatively assess the degree of blue light hazard to the human retina) also meets the national standard requirement of RG0 (no hazard level). Simultaneously, by setting the lower limit of the ratio R to 15%, preferably 18%, it ensures that the backlight retains the necessary amount, especially blue light in the 460nm-500nm range. This wavelength of blue light is not only crucial for maintaining color balance (its absence would result in a severe yellow tint) but also has a positive effect on non-image-forming visual functions. Therefore, by setting the ratio R within the range of 15%≤R≤25%, preferably 18%≤R≤22%, the harm of blue light can be reduced to an extremely low level, while the color accuracy and color reproduction capability of the white field can be maintained to the maximum extent. This ensures that the screen protects the eyes without causing unpleasant color shifts, achieving a balance between eye protection and color accuracy.

[0127] In some embodiments, the blue light energy in the 400nm to 455nm band accounts for less than or equal to 40% of the blue light energy in the 400nm to 500nm band. As mentioned earlier, traditional WLED light sources exhibit a sharp blue light peak in the 415nm-455nm band, primarily due to the blue LED chips used in WLED light sources, whose emission peak is located in the 445-455nm range. The energy in the existing 400-455nm band may account for 60% or even higher of the total blue light energy. This band of blue light photons has high energy and has been scientifically proven to pose a risk of photochemical retinal damage; long-term exposure may accelerate damage to retinal pigment epithelial cells. To address this issue, this application limits the proportion of blue light energy in the 400nm to 455nm band to ≤40% of the blue light energy in the 400nm to 500nm band, thereby reducing the energy in the highly hazardous band and lowering the blue light hazard to an extremely low level. In addition, in order to solve the problem that traditional light sources have strong spectral scattering due to sharp blue light peaks, which can easily lead to glare and visual stimulation and aggravate visual fatigue during long-term viewing, this application reduces the above proportion to less than or equal to 40%, which can smooth the spectrum. A smoother spectrum and softer high-energy blue light can effectively reduce the scattering phenomenon after entering the human eye, thereby reducing glare and improving visual comfort and durability.

[0128] At the same time, the above-mentioned proportion of less than or equal to 40%, and the synergistic solution of setting the ratio R in the range of 15%≤R≤25%, preferably 18%≤R≤22%, can enable the screen to reduce biological hazards while still using enough long-wavelength blue light to maintain the color accuracy of white and the balance of color, thereby achieving the technical effect of "eye protection without color distortion".

[0129] In some embodiments, the display device includes a liquid crystal display panel, a backlight module, and a driving module, wherein the driving module is used to turn off or reduce the brightness of all blue sub-pixels output by the liquid crystal display panel and dynamically increase the brightness of red and green sub-pixels when preset conditions are met. Users are more sensitive to screen light at night or in low-light environments. Even though hardware-level blue light filtering reduces harmful blue light, for users with eye protection needs such as reading before bed to aid sleep or those extremely sensitive to blue light, completely eliminating blue light stimulation is a core requirement. However, simply turning off the blue sub-pixels without any compensation will cause the screen to turn blackish-yellow or dark red, resulting in a sharp drop in brightness, leading to poor readability and rendering it unusable. Traditional devices' "eye protection mode" or "night mode" usually only gently reduces the color temperature and cannot achieve complete blue light elimination. To achieve "blue light-free" display while maintaining sufficient brightness and usable display quality, this application uses a driver module to continuously monitor the aforementioned preset conditions. Once these conditions are met, the brightness of all blue sub-pixels output by the liquid crystal display panel is turned off or reduced, while the brightness of the red and green sub-pixels is dynamically increased. Because the driving signals sent to all blue sub-pixels of the liquid crystal panel are directly cut off or significantly reduced, the backlight remains full-spectrum white light from the light source side. However, at the display panel level, blue light is completely blocked by the liquid crystal and cannot be transmitted, thus achieving "blue light-free" display. Simultaneously, the driver module uses a preset algorithm to dynamically increase the brightness of the red and green sub-pixels to compensate for the brightness loss due to the blue light being turned off, maintaining the overall screen brightness at a comfortable and usable level, ensuring sufficient brightness and usable display quality.

[0130] Furthermore, in some embodiments, the aforementioned preset conditions are at least one of the following: the system time reaches a preset nighttime period, the user manually activates the eye protection mode, or the ambient light sensor of the display device detects that the ambient brightness is lower than a preset brightness threshold. Specifically, for the condition that the system time reaches a preset nighttime period, a clock can be set inside the drive module, and the user can preset one or more "nighttime periods," such as 9:00 PM to 7:00 AM the next day. This condition eliminates the need for daily manual operation by the user, as the system will automatically enter eye protection mode at fixed times, which is especially suitable for setting regular routines for children or providing protection when the user forgets to activate it. The condition that the user manually activates the eye protection mode is an immediate trigger condition based on the user's subjective will. A switch for "eye protection mode" or "blue light-free mode" can be provided on the device's user interface (such as software settings or physical buttons), allowing the user to turn it on or off with a single click according to their feelings and needs. The condition that the ambient light sensor of the display device detects that the ambient brightness is lower than a preset brightness threshold is an intelligent trigger condition based on ambient light. The ambient light sensor on the device detects the light intensity of the surrounding environment in real time. When the detected brightness is lower than a certain preset threshold, the system automatically triggers the eye protection mode.

[0131] In some embodiments, the driving module is also used to dynamically increase the brightness of the red and green sub-pixels based on a preset color and brightness mapping model. The color and brightness mapping model is used to map the original RGB input signal to an adjusted RG signal output in a blue-light-free state, so that the color and brightness of the liquid crystal display panel approximate the target color and brightness. It is easy to understand that in the image source signal, R represents the grayscale value of the red sub-pixel; G represents the grayscale value of the green sub-pixel; and B represents the grayscale value of the blue sub-pixel. In a liquid crystal display, each pixel is generally composed of three sub-pixels: red, green, and blue. The RGB input signal assigns a brightness value from 0 (completely off) to a maximum value (e.g., 255, brightest) to each sub-pixel. Through the mixing of different brightness levels of these three sub-pixels, the human eye can perceive a variety of rich colors. The RG signal is the output signal processed by the driving module according to the color and brightness mapping model in the "blue-light-free mode." The B channel of this RG signal is forcibly turned off, meaning that the brightness value of the blue sub-pixel is always 0.

[0132] As mentioned earlier, in "blue light-free mode," the driving module dynamically enhances the brightness of the red and green sub-pixels using a preset algorithm to compensate for the brightness loss due to the blue light being turned off. This preset algorithm, for example, employs the aforementioned color and brightness mapping model. Specifically, the driving module pre-stores or integrates a color and brightness mapping model. This model, obtained through extensive calculations and experiments, contains rules for converting any RGB input value into a set of optimal RG output values ​​in the absence of the B channel. Ultimately, the driving module outputs the RG signal adjusted by the model calculation, while the B signal is set to zero. The LCD panel drives the sub-pixels based on the adjusted RG signal, presenting an optimized blue light-free image. The model's goal is to make the final display effect (mixed solely by RG light) as visually "close" to the target color and brightness as possible; that is, by increasing the grayscale values ​​of the R and G signals to compensate for the luminous flux lost due to the B channel being turned off, preventing the screen from being too dark.

[0133] In some embodiments, the display device includes a reflective display panel comprising an electrically conductive microcapsule layer configured to change the distribution of microparticles under the influence of an electric field to achieve display. The reflective display panel is, for example, an electronic ink screen. By employing a reflective display panel, paper-like display can be achieved.

[0134] In some embodiments, the display device includes a liquid crystal display panel and a backlight module, wherein the light emitted by the backlight module is full-spectrum light with a spectral continuity index of Cs ≥ 50%, where Cs is the ratio of the overlapping area of ​​the spectral energy distribution of the test light source and the standard light source in the wavelength range of 400nm to 780nm to the total spectral area of ​​the standard light source. Traditional WLED light sources have severe deficiencies in the cyan (480nm-510nm) and deep red (620nm-700nm) wavelength bands, resulting in sharp blue and yellow peaks in the spectral diagram, which differs significantly from the continuous and smooth natural spectrum such as sunlight. This discontinuous spectrum easily leads to visual fatigue, color distortion, and an unnatural feel. To solve this problem, the backlight module in this application emits full-spectrum light with a spectral continuity index Cs ≥ 50%, which makes the screen spectrum highly similar to natural light, thereby physically ensuring the naturalness and low irritation of its emitted light. Preferably, the spectral continuity index is Cs≥65%. This results in better display performance and helps improve eye protection.

[0135] Figure 6A This is a comparison graph showing the emission spectrum of a liquid crystal display panel according to the embodiments of this application and conventional technology, and the light source spectrum of the internationally recognized D65 standard. Figure 6AAs shown, the horizontal axis represents wavelength (nm), ranging from 400nm to 750nm, covering the main bands of visible light (blue, green, and red). The vertical axis represents relative power (W), which should be the normalized relative energy value used to compare the relative intensity distribution of spectral energy at different wavelengths, rather than the absolute power value. By comparing the three curves, the significant effect of this application in improving spectral continuity can be seen:

[0136] Firstly, the spectral curves of traditional technologies exhibit a typical "double-peak" shape: a sharp blue peak (approximately 450nm) and a broad yellow-green peak. Both exhibit a severe energy dip (i.e., a "spectral valley") in the cyan band of 480-510nm, and their overall shape differs significantly from the smooth and continuous D65 natural light spectrum. This discontinuous spectrum easily leads to color distortion and visual fatigue. In contrast, the emitted spectrum of the liquid crystal display panel in this application exhibits a relatively smooth and continuous shape across the entire visible light band. Although there are some fluctuations in the blue light region (approximately 450-480nm) and the green to red light region (approximately 550-700nm), the transition between the "peaks" and "valleys" is relatively gentle, without the sharp and isolated peaks commonly found in the spectrum of traditional LED backlights. This is closer in morphological trend to the smooth and continuous natural light spectral curve represented by the D65 standard light source.

[0137] Secondly, the traditional "blue LED + yellow phosphor" solution suffers from a severe dip ("spectral valley") in the cyan band of 480-510nm. Observations of the curves in this application show that in the cyan band of approximately 480nm to 500nm, the spectral energy does not completely drop to the bottom, but rather maintains a considerable energy level, successfully filling the key missing band in the traditional spectrum and improving spectral integrity.

[0138] As shown above, this application reconstructs the emission spectrum of the liquid crystal display panel. The final effect is that, while effectively avoiding harmful high-energy blue light in the 415-455nm range (as can be seen from the curve, this wavelength is significantly suppressed), the spectral continuity (Cs) of the screen's emitted light is greatly improved. The backlight module in this application emits full-spectrum light, and the spectral continuity index Cs of the full-spectrum light is ≥50%, preferably greater than or equal to 65% or 75%. This continuous emitted light, close to the spectral characteristics of natural light, can effectively reduce visual fatigue caused by spectral discontinuity and glare, providing a more comfortable and healthy visual environment for long-term reading and writing.

[0139] Figure 6B This is a comparison graph of the light source spectra of this application and conventional technologies. (Example:) Figure 6BAs shown, the horizontal axis represents wavelength (nm), ranging from 380nm to 780nm, fully covering the visible light band (approximately 400-700nm) and extending slightly into the near-ultraviolet and near-infrared regions. The vertical axis represents relative intensity, i.e., the normalized relative value of light energy, used to compare the distribution of energy intensity at different wavelengths, rather than absolute brightness. Traditional LED lights exhibit a sharp, high, isolated blue peak at approximately 450nm. This is precisely the typical drawback of the "blue LED chip + YAG yellow phosphor" solution. The sharp peak falls precisely in the 415-455nm high-energy harmful blue light band, a major source of visual fatigue and potential photochemical damage to the retina. The full-spectrum LED lamp used in this application exhibits a significantly shifted and broadened blue peak towards longer wavelengths, with a substantial reduction in peak height, forming a broad and gentle "blue light band." This is precisely the effect achieved by using a long-wavelength blue LED chip with a center wavelength in the 456nm to 475nm range. Therefore, this application reduces the radiation intensity of high-energy harmful blue light (HEBL), laying a solid foundation for achieving hardware-level, color-biased RG0-level eye protection and blue light blocking. Moreover, the spectrum of traditional technologies exhibits a typical "..." The fragmented spectrum of traditional LEDs, characterized by a "blue peak + yellow slope," exhibits a "spectral valley" (particularly in the cyan band of 480-520nm), while energy rapidly decays in the deep red region above 620nm. This discontinuous and severely incomplete spectrum deviates significantly from natural light, easily leading to color distortion, visual discomfort, and fatigue. The full-spectrum LED used in this application enhances the energy in the cyan band of 480-520nm, smoothly transitioning with the blue and green light regions, perfectly compensating for the major spectral deficiency of traditional solutions. In the deep red to near-infrared band of 620-780nm, energy remains high, resulting in a full spectral "tail." Furthermore, the entire curve exhibits no abrupt breaks or drops from blue to red light, presenting a highly continuous and smooth, natural-light-like appearance.

[0140] The above comparison shows that traditional technologies, in pursuit of high luminous efficiency and low cost, sacrifice spectral continuity and health benefits. This makes display devices using such lamps as backlights unsuitable for optical telephoto devices like reading desks or viewing screens where eye protection is paramount, thus failing to achieve the desired eye-friendly effect. In contrast, the light source in this application aims for a continuous spectrum closer to natural light while controlling blue light energy distribution. Although it sacrifices some of the peak brightness efficiency of traditional LEDs, it improves visual health and comfort, fundamentally providing a more eye-friendly and fatigue-free display basis for prolonged reading and writing scenarios.

[0141] In some embodiments, the backlight module includes a backlight source, which includes a long-wavelength blue LED chip and a hybrid fluorescent material. The hybrid fluorescent material is disposed in the optical path of the backlight module and configured to be excited by the long-wavelength blue light emitted by the long-wavelength blue LED chip to generate full-spectrum light. The center wavelength of the long-wavelength blue light is in the range of 440nm to 475nm. The center wavelength of the blue LED chips used in traditional backlights is 445nm-455nm, and their emission peak falls in the 415nm-455nm band, which has been proven by studies to be the band with the highest risk of photochemical retinal hazard. This application uses a long-wavelength blue LED chip with a center wavelength of 440nm-475nm as a pump light source, which shifts the overall emission spectrum of the LED chip itself towards the long wavelength direction, moving the peak of the luminous energy out of the high-hazard area and achieving low blue light. Since the LED chip itself no longer generates a large amount of high-energy harmful blue light, the product can achieve the RG0 non-hazard level without relying on post-processing software or film filtering, and fundamentally avoids the color shift problem caused by filtering. Furthermore, traditional backlights suffer from a lack of cyan and insufficient red light, resulting in spectral discontinuity, poor color rendering, and visual discomfort. The use of hybrid fluorescent materials can fill these spectral gaps, constructing a continuous and balanced full spectrum. When excited by long-wavelength blue light, the hybrid fluorescent materials emit light of specific wavelengths. Specifically, green emitting materials fill the green light region; red emitting materials supplement deep red light, improving the color rendering index; and cyan supplementary materials fill the cyan gap between blue and green light. By reconstructing the spectrum through hybrid fluorescent materials, the output white light can possess spectral continuity (spectral continuity index Cs ≥ 50% for full-spectrum light), closely resembling natural light and providing a healthy and comfortable light source foundation for the visual system.

[0142] Hybrid fluorescent materials that achieve the aforementioned functions and effects include, for example, quantum dot materials and / or narrowband phosphors. The quantum dot materials comprise at least two types of quantum dots, wherein the emission peak of the first quantum dot is in the range of 525nm-535nm, and the emission peak of the second quantum dot is in the range of 630nm-650nm. The narrowband phosphors include at least narrowband green phosphors and narrowband red phosphors. The emission wavelength of the quantum dots can be precisely controlled by changing the size of their nanocrystals. The larger the size, the longer the emission wavelength. The first quantum dot, with an emission peak in the range of 525nm-535nm, can fill the green light band and smoothly transition to long-wavelength blue light. The second quantum dot, with an emission peak in the range of 630nm-650nm, can supplement the deep red light most lacking in traditional solutions, thus improving the color rendering index (CRI), especially R9 (saturated red). Furthermore, the narrow emission spectrum of quantum dots means high color purity, making them ideal materials for achieving wide color gamut displays. Narrow-band green and red phosphors can achieve similar effects to quantum dots, serving as alternatives or complements to them to enhance green and red light, ensuring spectral fullness and continuity. By employing quantum dot materials and / or narrow-band phosphors, the spectral continuity index Cs can be improved to ≥50% or even higher.

[0143] Furthermore, in some embodiments, the quantum dot material also includes supplementary materials, such as quantum dots or phosphors with emission peaks in the range of 480nm-510nm. The 480nm-510nm range corresponds to the cyan wavelength, where traditional backlights experience an energy trough. This is because the emission peak of blue LED chips decays at this point, while the emission peak of green quantum dots has not fully developed, resulting in a poor transition. To address this issue, this application introduces supplementary materials, including quantum dots or phosphors with emission peaks in the 480nm-510nm range, which themselves emit cyan light. This raises the cyan trough to an energy level similar to the surrounding area, achieving a smooth transition.

[0144] In other embodiments, the quantum dot material further includes a third quantum dot. Both the third and first quantum dots are green quantum dots, with the third quantum dot having a smaller diameter than the first quantum dot, and its emission peak value is between 520 nm and 5 nm. The emission wavelength of a quantum dot is determined by its diameter. The smaller the diameter, the shorter the emission wavelength. The first quantum dot (primarily green): has a larger diameter and an emission peak value in the range of 525 nm to 535 nm, covering the green light region. The third quantum dot (cyan-green): has an even smaller diameter, thus its emission peak value is blue-shifted to the range of 520 nm ± 5 nm (i.e., 515 nm to 525 nm). When these two different sizes of green quantum dots are mixed, their emission spectra partially overlap, forming a continuous and broad "cyan-green" composite emission band extending from 500 nm to 560 nm. The leading edge (short-wavelength side) of this composite emission band connects well with the tail of the long-wavelength blue light, thereby raising the cyan trough to a similar energy level as the surrounding area, achieving a smooth transition. Therefore, the above design can improve the spectral continuity index Cs.

[0145] In some embodiments, the quantum dot material includes a quantum dot enhancement film independent of the long-wavelength blue LED chip. The long-wavelength blue LED chip is first packaged into standard white or blue LEDs, and the light emitted by these LEDs, together with backlight components (such as light guide plates and diffusers), constitutes a primary backlight. The quantum dot enhancement film (QDEF), as a separate optical film, is placed at an appropriate location in the backlight module (typically on the light-emitting side of the light guide plate). When blue light from the primary backlight passes through the quantum dot enhancement film, the quantum dots in the film are excited, emitting red and green light, which mix with the transmitted blue light to ultimately form full-spectrum light.

[0146] In other embodiments, the quantum dot material comprises quantum dots encapsulated on a long-wavelength blue LED chip. During the LED encapsulation stage, the quantum dot material (typically mixed within an encapsulating colloid) is directly coated around the long-wavelength blue LED chip. The blue light emitted by the chip excites the nearby quantum dots, which then mix to form white light over an extremely short distance. This method results in a short optical path, theoretically higher luminous efficacy, and a more compact structure.

[0147] Figure 7 A comparison diagram of the backlight spectrum of this application and a conventional screen is shown. (See diagram for reference.) Figure 7 As shown, the horizontal axis represents the wavelength of light (nm), ranging from 400nm to 750nm, fully covering the main bands of visible light (blue, green, and red). The vertical axis represents the normalized relative power / intensity. This value is used to compare the relative intensity distribution of light energy at different wavelengths. Figure 7The backlight spectrum of a traditional screen shows a sharp, isolated blue light peak at approximately 450 nm. This is a typical characteristic of the traditional "blue LED chip + yellow phosphor" solution. This peak falls precisely in the 415-455 nm high-energy harmful blue light (HEBL) band, posing a high risk of retinal photochemical damage. In contrast, the blue light peak of the backlight spectrum of the screen in this application is significantly shifted to longer wavelengths, reaching approximately 460 nm and above. This is a direct result of using a long-wavelength blue LED chip with a center wavelength of 440 nm-475 nm as the pump light source, shifting the peak of luminous energy out of the high-hazard region and achieving low blue light emission.

[0148] Furthermore, the backlight spectrum of traditional screens exhibits a sharp blue peak and a broad yellow-green peak, with a "spectral valley" between them (especially in the cyan band of 480-520nm). This discontinuous spectrum differs significantly from natural light, easily leading to color distortion and visual fatigue. The backlight spectrum of the screen in this application transitions smoothly from blue to red light without steep breaks or deep valleys. Especially in the cyan band of 480-510nm and the deep red band above 620nm, it maintains considerable energy, which is consistent with… Figure 6A The continuity trend of the natural light spectrum in the D65 standard is consistent. This is thanks to the hybrid fluorescent materials used in this application. For example, the hybrid fluorescent materials include quantum dot materials and / or narrowband phosphors. Green and red quantum dots (or phosphors) precisely fill specific wavelengths, smoothly transitioning with the spectral tail of long-wavelength blue light, together "filling in" the "canyons" in the traditional spectrum. This allows the spectral continuity index Cs of the final white light to be increased to over 50%, providing a healthy lighting foundation similar to natural light at the light source level.

[0149] Furthermore, traditional screens pursue high color gamut and brightness at the expense of sharp blue peaks and fragmented spectra, neglecting visual health during prolonged viewing. The backlight spectrum of the screen in this application is in the 460-500nm band, providing ample energy for display. Blue light in this band is not only crucial for maintaining color balance (its absence would result in a severe yellow tint), but also has a positive effect on non-image-forming visual functions. This is precisely because this application sets the ratio R within the range of 15%≤R≤25%, preferably 18%≤R≤22%, which reduces blue light hazards to an extremely low level while maximizing white point color accuracy and color reproduction capabilities. This ensures that the screen protects the eyes without exhibiting unpleasant color shifts, achieving a balance between eye protection and color accuracy.

[0150] In some embodiments, the display device includes a liquid crystal display panel, which includes color filters. The thickness of the red, green, and blue color filters is in the range of 0.8µm to 1.9µm, preferably in the range of 0.8µm to 1.2µm. Traditional LCD display devices use thicker color filters with higher optical density to achieve a high color gamut. These color filters have a very narrow transmission spectrum, designed to make the three primary colors (red, green, and blue) as pure and non-overlapping as possible. However, this results in the spectrum of the final emitted light being fragmented into three isolated, sharp peaks with deep "spectral valleys" between them. This discontinuous spectrum, far removed from the continuous, smooth natural light, is considered by research to be one of the important causes of visual fatigue and discomfort. This application, by changing the thickness of the red, green, and blue color filters, can control their optical properties, namely optical density and spectral selectivity. By ensuring that the thicknesses of the red, green, and blue color filters are all within the range of 0.8µm to 1.9µm, the color filters allow a wider range of light wavelengths to pass through. The broadened R, G, and B transmission spectra generate more overlapping areas. When full-spectrum backlight passes through, the light emitted from each sub-pixel is no longer an isolated monochromatic light, but rather contains light of a certain range of wavelengths. This allows for a smooth transition across the entire spectrum, effectively "filling" spectral valleys and thus improving the spectral continuity index of the final emitted light.

[0151] In some embodiments, the thickness of the color filter is configured to achieve an NTSC color gamut coverage of 30% to 85% for the liquid crystal display panel. In some examples, the thicknesses of the red, green, and blue color filters are all in the range of 1.0µm to 1.9µm, which can achieve an NTSC color gamut coverage of 70% to 90% for the liquid crystal display panel. In other examples, the thicknesses of the red, green, and blue color filters are all in the range of 0.6µm to 1.2µm, which can achieve an NTSC color gamut coverage of 30% to 70% for the liquid crystal display panel. The display industry has long regarded high color gamut (e.g., >92% NTSC) as a core indicator of high-end screens, achieving this through the use of thick color filters and narrow-band backlights. However, this leads to "spectral peaking," making the screen light unnatural and easily causing visual fatigue. For the target users of space optical telescopes (students, office workers who spend long hours working), visual comfort and health are far more important than the ability to display extremely vivid colors that are rarely seen in daily life. Based on this, this application configures the thickness of the red, green, and blue color filters within the range of 0.8µm to 1.9µm. The direct optical result is to limit the NTSC color gamut to a "sufficient and healthy" range of 30% to 85%. The upper limit of 85% NTSC ensures that the screen colors can cover 100% of the sRGB color gamut, guaranteeing true and accurate color display and avoiding distortion. The lower limit of 30% NTSC allows for better spectral continuity and visual comfort by reducing the color gamut.

[0152] Figure 8 This is a normalized transmission spectrum curve of the red, green, and blue filters in this application. Figure 8 As shown, the horizontal axis represents the wavelength of light (nm), extending from 380nm to 771nm, fully covering and slightly exceeding the visible light range of the human eye (approximately 400-700nm). The vertical axis represents the normalized transmittance (%), ranging from 0 to 0.12. It reflects the distribution of the relative backlight transmittance of the color filter at different wavelengths, and its curve shape directly determines the color gamut and spectral continuity. Figure 8As can be seen, this application, by configuring the thickness of the red, green, and blue color filters within the range of 0.8µm to 1.9µm, obtains red, green, and blue curves that all exhibit broad, gentle "hill-like" wave packets, rather than the sharp "needle-like" narrow peaks of traditional high color gamut filters. For example, the green curve exhibits significant transmittance across a wide range of approximately 500nm to 600nm. This is a direct optical result of configuring the thickness of the red, green, and blue color filters within the range of 0.8µm to 1.9µm, especially within the range of 0.8µm to 1.2µm. The color filters in this application are thinner and have lower density than traditional filters, allowing a wider range of wavelengths of light to pass through, resulting in a significant increase in the spectral half-width (FWHM) of each color channel. Moreover, Figure 8 A large, continuous overlap is formed between the three curves: the blue and green light curves overlap at approximately 480-520nm (cyan band); the green and red light curves overlap at approximately 560-600nm (yellow-orange band). This large, continuous overlap means that when full-spectrum backlighting is transmitted, the light emitted from each sub-pixel (such as the "green" pixel) is no longer isolated monochromatic light, but a mixture of light from neighboring bands (parts of blue and red light). This allows the white light mixed from adjacent pixels to naturally blend and smoothly transition at color boundaries, effectively filling the steep valleys in the traditional spectrum. Furthermore, the width of the curves is directly related to the color gamut. Wider curves mean lower color purity, i.e., a smaller color gamut. Figure 8 The broad curve shape is a direct visual proof that this application actively limits the NTSC color gamut to the "sufficient and healthy" range of 30% to 85%.

[0153] In some embodiments, the screen surface of the display device is provided with a paper-like film, and the surface optical properties of the paper-like film satisfy at least one of the following conditions: reflectivity less than or equal to 5%; haze greater than or equal to 20% and less than or equal to 40%; and specular gloss less than 30 GU under an incident angle of 60°.

[0154] Specifically, to achieve low reflectivity (≤5%), this application can design fine concave-convex structures on or inside the paper-like film, so that incident ambient light is not subjected to single specular reflection, but is reflected and scattered at multiple angles. This structure can increase the optical path of light within the film layer, and in conjunction with low refractive index materials, promote destructive interference of light, or through a specific anti-reflective coating, disperse or capture most of the ambient light energy instead of reflecting it back to the human eye, thereby significantly reducing the overall reflectivity and making the screen content clearer under ambient light.

[0155] Haze measures the proportion of light scattered. To achieve a haze of 20% or more, this application uses microparticles within the paper-like film or microstructures on its surface as scattering centers. When the screen's self-emissive light shines towards the human eye from within, these scattering centers cause a certain degree of diffusion. This haze range is sufficient to make the light feel as soft and natural as if it were emanating from within the paper; yet it is not too high, which would cause image blurring, reduced detail, and decreased contrast.

[0156] Gloss directly characterizes the smoothness of a surface. The random, irregular, and rough topology of a paper-like film surface completely destroys the macroscopic flatness necessary for specular reflection. When light shines on it, it is dispersed in all directions, failing to form a concentrated, high-brightness specular reflection spot. A specular gloss level of less than 30 GU ensures that the paper-like film surface visually presents a matte texture similar to paper, rather than the glossiness of plastic or glass.

[0157] In other embodiments, the surface optical properties of the paper-like film may also satisfy at least one of the following conditions: reflectivity less than or equal to 1%; haze greater than or equal to 40% and less than or equal to 60%; and specular gloss less than 5 GU at an incident angle of 85°.

[0158] In very bright indoor environments (such as near windows) or under strong lighting, paper-like films with a reflectivity ≤5% may still exhibit slight ambient light reflection. To overcome this issue, this application utilizes a multi-layered nanostructured anti-reflective coating or a gradient refractive index structure. The principle is that when light passes through thin layers with different refractive indices, the reflected light cancels each other out due to interference. To achieve a reflectivity ≤1%, precise nanoscale control of the film thickness, material, and structure is required.

[0159] A haze level of 40% or higher and 60% or lower allows screen displays to simulate art papers (such as sketch paper and watercolor paper) with higher diffuse reflection properties (i.e., higher haze) and special textures. This requires stronger or denser scattering centers. The proportion of light scattering can be significantly increased by designing more pronounced multi-scale surface topologies or by doping the polymer matrix with higher concentrations or specific sizes of scattering particles. High haze diffuses light more softly, but excessive haze can also sacrifice image sharpness and contrast. Maintaining haze within the 40%-60% range strikes a balance between achieving an ultimate paper-like feel and maintaining usable sharpness.

[0160] When a user views the screen edge at a near-parallel angle (an incident angle of 85°, close to a grazing angle), traditional AG films may still exhibit slight glare. To achieve virtually no glare even at this extreme angle, and thus glare-free viewing from all angles, this application achieves a specular gloss level of less than 5 GU at an incident angle of 85°. This ensures that users are not affected by specular glare at most possible viewing angles, providing comprehensive visual protection. To achieve a level of less than 5 GU, the surface microstructure of the paper-like film must be random, irregular, and have sufficient depth. This structure ensures that even if light grazes the surface at a near-parallel angle, it will be captured and dispersed by the complex micro-nano structure, preventing any directional concentrated reflection, thereby completely eliminating the feeling of luminescence and presenting a matte texture.

[0161] In other embodiments, the paper-like film includes a substrate and a biomimetic microstructure layer formed on the surface of the substrate, the biomimetic microstructure layer having a surface topology. In some examples, the arithmetic mean roughness of the surface topology is greater than or equal to 0.3 μm and less than or equal to 2.5 μm; in other examples, the average width of the surface topology profile is greater than or equal to 30 μm and less than or equal to 150 μm. Both of the above examples can be used simultaneously, or either one can be used.

[0162] Traditional anti-glare (AG) films typically employ regular (e.g., prism arrays) or quasi-random microstructures, which are designed rather than biomimetic replicas. Therefore, their optical and tactile properties always differ from the complex, irregular microstructure of real paper, failing to achieve a truly authentic paper-like experience. Without quantitative control over the microstructure, defining the experience solely by final optical properties (e.g., haze, gloss) can lead to inconsistent experiences between different batches, or different technical approaches (e.g., high internal scattering rather than surface scattering) achieving the same optical properties but resulting in vastly different tactile sensations, failing to guarantee the uniformity and authenticity of the "paper-like" experience. To address this issue, this application utilizes precise biomimetic replication of the surface's micro-geometry to control and reproduce macroscopic optical and tactile properties.

[0163] Arithmetic mean roughness Ra is the arithmetic mean of the absolute values ​​of the distances from each point on the surface profile to the center line, quantifying the height of surface undulation in the vertical direction. This application achieves an arithmetic mean roughness of the surface topology greater than or equal to 0.3 μm and less than or equal to 2.5 μm, which is on the same order of magnitude as or even larger than the wavelength of visible light, effectively scattering and diffracting incident light. The Ra value directly affects haze and gloss. If the Ra value is too small (<0.3 μm), the surface is too smooth, resulting in insufficient scattering, strong specular reflection, and high gloss; if the Ra value is too large (>2.5 μm), scattering is too intense, potentially leading to excessive image blurring. Furthermore, an arithmetic mean roughness within the range of greater than or equal to 0.3 μm and less than or equal to 2.5 μm is a scale that can be clearly perceived by the tactile nerves of the human fingertip, and is crucial for achieving the sensation of paper friction and damping.

[0164] The average width RSm of the surface topology profile is the average spacing of the micro-irregularities in the horizontal direction, quantifying the density of the surface texture. RSm determines the angular distribution of scattered light. A wider spacing (larger RSm value) produces more concentrated forward scattering, while a denser spacing (smaller RSm value) results in more uniform light dispersion. This application ensures that the average width of the surface topology profile is greater than or equal to 30 μm and less than or equal to 150 μm, thus ensuring that light is diffused softly and uniformly, forming a diffuse reflection light field similar to paper, while avoiding the formation of regular diffraction fringes. Moreover, this range allows the human eye to perceive the texture of the surface (visual paper texture) at a normal reading distance without perceiving regular patterns due to excessively dense or sparse textures, thereby maintaining visual randomness and a sense of naturalness.

[0165] Furthermore, in some embodiments, the biomimetic microstructure layer is made of a nanoimprint adhesive cured by ultraviolet light, wherein the refractive index of the nanoimprint adhesive is greater than or equal to 1.45 and less than or equal to 1.55. Before ultraviolet irradiation, the nanoimprint adhesive is in a liquid state, exhibiting good fluidity and capable of filling every microstructural gap in the master mold. Under ultraviolet irradiation, the liquid nanoimprint adhesive rapidly undergoes a cross-linking reaction and solidifies, accurately replicating the structural "negative image" of the master mold, thereby achieving nanoscale precision structural replication. Based on this, by ensuring the refractive index of the nanoimprint adhesive is greater than or equal to 1.45 and less than or equal to 1.55, it can be matched with the substrate, creating a suitable refractive index difference between the nanoimprint adhesive and the substrate. This suitable refractive index difference is the physical basis for generating effective light scattering, thus achieving the desired haze and low gloss. Without a refractive index difference, the microstructure's ability to regulate light would be greatly weakened. However, the refractive index difference cannot be too large, as this would generate excessive Fresnel reflection at the microstructure interface, increasing the overall surface reflectivity and hindering the achievement of ≤1% or ≤5% reflectivity. Simultaneously, it could lead to excessive internal scattering loss, reducing screen brightness and contrast. Therefore, by ensuring the refractive index of the nanoimprint adhesive is greater than or equal to 1.45 and less than or equal to 1.55, sufficient light scattering is ensured in the biomimetic microstructure layer to achieve 20%-60% haze and <30GU gloss. Furthermore, unnecessary interface reflection loss is minimized, synergistically achieving ≤1% or ≤5% reflectivity while maintaining high light transmittance and avoiding a significant decrease in screen brightness and color saturation.

[0166] In some embodiments, the paper-like film surface is covered with an anti-reflective coating. The biomimetic microstructure layer primarily reduces glare by converting specular reflection into diffuse reflection, but it cannot completely eliminate the total amount of reflected light. Especially at angles close to perpendicular incidence, a certain amount of light will still be reflected back. Moreover, in strong ambient light, even if the reflected light is diffused into a soft, non-glaring light, a layer of "white haze" will still cover the screen, reducing image contrast and color saturation (i.e., "whitening"). To solve these problems, by covering the paper-like film surface with an anti-reflective coating, the synergistic effect with the biomimetic microstructure layer makes the screen appear almost imperceptible in most environments. Ambient light interference is minimized, and the content appears to float in mid-air, providing an unparalleled immersive reading and viewing experience.

[0167] Anti-reflective coatings are typically made by alternating layers of transparent thin films (such as silicon dioxide and titanium dioxide) with different refractive indices at specific thicknesses. When ambient light shines on the coating, reflections occur at the upper and lower interfaces of each film. By designing the thickness of each film (typically 1 / 4 wavelength), the optical path difference between the light beams reflected from different interfaces is made exactly half a wavelength, thus achieving phase reversal and mutual cancellation. The anti-reflective coating and the biomimetic microstructure layer can work synergistically. First, the interference effect of the anti-reflective coating is used to minimize the total energy of light reflected from the surface. Then, the biomimetic microstructure layer disperses any remaining, incompletely eliminated reflected light into diffuse, low-intensity light as it leaves the surface and encounters the microstructure layer, thereby completely eliminating its ability to form glare or sharp images.

[0168] In some embodiments, the space optical telescope further includes an ambient light compensation module, which comprises an ambient light lamp, an ambient light sensor, and a control unit. The ambient light lamp is arranged around the liquid crystal display panel. For example, the ambient light lamp is an LED strip arranged around the frame of the display device. Compared to illuminating lamps on only one or both sides, an LED strip arranged around the frame of the display device can form a uniform, shadowless light curtain, avoiding uneven brightness or shadow interference. The ambient light sensor is used to detect ambient brightness. The control unit connects the ambient light lamp and the ambient light sensor and is used to adjust the brightness of the ambient light lamp according to the ambient brightness and the display brightness of the display device.

[0169] In dimly lit environments (such as at night with only a desk lamp on), the bright screen contrasts sharply with the dark background, causing significant stimulation and stress to the eyes, a major cause of visual fatigue and increased intraocular pressure. In bright environments, screen content may appear washed out and unclear due to ambient light reflection, leading users to instinctively increase screen brightness unnecessarily, which is also detrimental to eye health. Traditional enclosed far-viewing devices, with the screen in a dark box, present the user with only a bright screen and surrounding darkness, creating a strong contrast that easily triggers discomfort. To address this issue, this application utilizes an ambient light source to actively illuminate the screen, creating a smooth brightness buffer between the screen and the user's eyes, matching the comfortable range of human vision. Furthermore, by using an ambient light sensor to monitor ambient brightness in real time and adjusting the ambient light's brightness according to the ambient and display brightness via a control unit, closed-loop feedback control can be achieved, enabling precise adjustment of the ambient light's brightness.

[0170] Furthermore, in some embodiments, the control unit is also used to maintain the ratio of the display brightness of the display device to the ambient brightness between 1:3 and 3:1. In a dark environment, the screen is the only light source, and its brightness ratio to the ambient brightness may be as high as 30:1 or even higher. This extreme contrast causes the pupils to constrict violently and the ciliary muscles to become highly tense, leading to dry eyes, eye strain, and soreness in a short time. Over time, this may worsen myopia or cause other eye diseases. Under strong ambient light, the screen content may appear washed out due to reflection. Users may increase the brightness to see it clearly, but this is usually a blind adjustment that cannot accurately match the ambient light, leaving the user in an uncomfortable brightness contrast state. Visual physiology research generally suggests that when the human eye simultaneously views a target and a background, maintaining the brightness ratio within a reasonable range results in the most comfortable visual system and the least accommodative burden. This application maintains the ratio of the display brightness to the ambient brightness of the display device between 1:3 and 3:1 through the control unit. It is based on this research and design of such a ratio range. Within this range, the human eye does not need to instantly constrict the pupil to adapt to the bright content on the screen, nor does it need to dilate the pupil when looking away from the screen to a dark environment, thus achieving a smooth and low-load visual switching.

[0171] In some embodiments, the control unit is also configured to calculate the target brightness Lstrip of the ambient lighting using the following formula:

[0172] Lstrip = K·(Lscreen / Lenv)

[0173] Where K is the calibration coefficient, Lscreen is the display brightness of the display device, and Lenv is the ambient brightness.

[0174] The Lscreen / Lenv ratio reflects the real-time imbalance of the current visual environment. When this ratio increases (i.e., the screen is too bright relative to the environment), the control unit will proportionally increase the brightness of the fill light to suppress the increase in the ratio by increasing the ambient brightness (Lenv). Conversely, when the ratio decreases (i.e., the screen is too dark relative to the environment), the control unit will proportionally decrease the brightness of the fill light to prevent the ratio from decreasing by reducing the ambient brightness (Lenv). This method of directly calculating the output based on the current state has a fast response speed and can compensate for brightness changes instantly. The calibration coefficient K is essentially a gain coefficient. It determines the correction strength of the control unit for brightness imbalance. For the differences in luminous efficacy between different batches and models of ambient fill lights, different calibration coefficients K can be used for calibration. For example, for ambient fill lights with low luminous efficacy, a larger K value can be set so that the same calculation result can output a higher brightness value to achieve the target brightness.

[0175] In some embodiments, the space optical telescope further includes a color processing unit for performing dynamic adaptive color mapping, including: establishing a native color gamut boundary model of the liquid crystal display panel; dynamically generating the optimal display color gamut based on the input image content; and performing color mapping that combines hue fidelity, saturation compression, and brightness linkage. Traditional color management is designed for displays with a wide color gamut. When applied to low color gamut panels, vivid colors exceeding the panel's physical color gamut can only be simply cropped or subjected to rigid linear compression, resulting in color blocks, banding, loss of detail, and severe color distortion, leading to a very poor visual experience. Furthermore, static mapping cannot adapt to ever-changing image content. Mapping an image dominated by red and an image dominated by blue within the same fixed, narrow color gamut cannot simultaneously guarantee the accuracy of their core colors. To address this issue, this application prioritizes spectral continuity and visual comfort, moderately sacrificing the physical color gamut. However, if this results in severe color display distortion, it will compromise the user experience. Therefore, this application aims to compensate for insufficient color performance without altering the physical color gamut. This application establishes a native color gamut boundary model for the liquid crystal display panel in a color space to define "what colors the screen can display and what colors it cannot display." Then, it dynamically generates the optimal display color gamut based on the input image content. For example, it analyzes the image content of each frame or scene in real time to determine which colors are primary and important, and dynamically generates the optimal display color gamut based on the analysis results. The shape and size of this optimal display color gamut are dynamically changing; it surrounds the core colors of the current image as much as possible, ensuring that the most important colors of the current image are mapped preferentially and accurately. Afterward, it performs color mapping that combines hue fidelity, saturation compression, and brightness linkage, thereby finding a balance between healthy display and color fidelity.

[0176] In some embodiments, such as Figure 9 and Figure 10 As shown, the magnifying imaging optical path includes a supplementary light and a control unit. The supplementary light is used to illuminate the image source placement area corresponding to the magnifying imaging optical path. Furthermore, as... Figure 11 and Figure 12 As shown, the support assembly 2 is provided with a first connection part 51 for electrical connection with the display device 4, and the display device 4 is provided with a second connection part 61 that cooperates with the first connection part 51. The control unit is electrically connected to the first connection part 51 and the fill light. When the control unit detects that the display device 4 is connected to the support assembly 2, it adjusts the brightness of the fill light.

[0177] Specifically, the supplemental lighting includes at least one LED strip. For example... Figure 9As shown, these light strips can be positioned in at least one of the following locations: the light strip positioned in the first location is referred to as the first light strip 131, and there are at least two first light strips 131, wherein the first location is where the light-splitting component 12 has a reflective structure in the first direction ( Figure 9 Positioned on both sides in the X-direction, at least one first light strip 131 can be provided on each of these two sides. This first direction is parallel to the left-right direction of the eye box area, i.e., parallel to... Figure 9 The direction of the X-axis. Taking the outline shape of the beam splitter 12 as rectangular as an example, each first lamp strip 131 can be extended along the side edges of the beam splitter 12 in the first direction (that is...). Figure 9 When the beam splitter 12 is placed vertically, the first light strip 131 extends in the vertical direction. A light strip positioned at a second location is referred to as a second light strip 132, and there is at least one second light strip 132. This second location is where the beam splitter 12 is positioned in the second direction (…). Figure 9 The position on the bottom side of the Z-direction, which is parallel to the vertical direction of the eye box area, i.e., parallel to... Figure 9 The direction of the Z-axis. Taking the outline shape of the beam splitter 12 as a rectangle as an example, each second light strip 132 can extend along the direction parallel to the bottom side of the beam splitter 12. The light strip set at the third position is called the third light strip 133. There is at least one third light strip 133. The third position is the position below the curved magnifying component 11. Taking the outline shape of the curved magnifying component 11 as a rectangle as an example, each third light strip 133 can extend along the bottom side of the curved magnifying component 11.

[0178] For the space optical telescope 100, its typical usage scenario is indoors. Without supplemental lighting, the brightness of the reflected light from the ambient light shining on the book or screen, after passing through the beam splitter 12 and the curved magnification component 11, may be too low to reach the human eye, rendering it unusable in dim environments and severely limiting its application scenarios. Existing technologies typically employ unidirectional illumination (such as only a top light or a single-sided light), resulting in heavy shadows on the user's hand and pen tip, directly obscuring the image source placement area and interfering with reading and writing. Moreover, a single light source is unlikely to achieve uniform illumination distribution across the entire image source placement area (book / screen), potentially resulting in a bright center and dark edges.

[0179] To address the aforementioned issues, this application can provide at least two first light strips 131 at the first position, or provide corresponding light strips at any two of the first, second, and third positions. This allows for multi-angle light sources to illuminate the image source placement area from at least two directions. When a light source is blocked by a hand, creating a shadow, light from at least one other light source will fill the shadow area from other angles, thus softening and eliminating the shadow. Specifically, the first light strips 131 positioned on both sides of the reflective structure in the first direction can avoid the main activity area of ​​the user's hand (front), solving the problems of hand obstruction and excessive heat due to proximity to the hand. The second light strip 132 positioned on the bottom side of the reflective structure in the second direction, and the third light strip 133 positioned below the curved magnifying component 11, can provide supplementary lighting from below, further filling in any vertical shadows that may be generated by light from the left and right sides, and ensuring the uniformity of illumination in the lower half of the image source placement area. Of course, in practical applications, one or more combinations of the first, second, and third light strips can be selectively provided according to specific needs. For example... Figure 9 An example with a first, second, and third light strip is shown; Figure 10 An example with the first and third light strips is shown, omitting the second light strip 132.

[0180] Based on this, please refer to some embodiments as well. Figures 11 to 15 The support assembly 2 is provided with a first connecting part 51 for electrical connection with the display device 4, and the display device 4 is provided with a second connecting part 61. The first connecting part 51 and the second connecting part 61 are electrically connected. This application achieves automatic electrical connection the moment the display device 4 is installed, by electrically connecting the first connecting part 51 integrated in the support assembly 2 with the second connecting part 61 integrated in the display device 4. This solves the problem of messy desktop cables and cumbersome operation caused by separately connecting the power cord and data cable to the display device 4. Furthermore, this detachable electrical connection method provides technical feasibility for the rapid replacement, upgrading, or adaptation of the display device 4 to different models of tablet devices, expanding the product's flexibility and lifespan.

[0181] Furthermore, in some embodiments, the electrical connection between the first connecting part 51 and the second connecting part 61 includes at least one of the following: flexible plug connection, rigid plug connection, wiring connection, and wireless connection. For flexible plug connection, the user only needs to perform the action of "placing" or "pushing in" the display device 4, and the electrical connection is automatically completed. This connection method has good durability and contact reliability, and can withstand repeated plugging and unplugging. Wiring connection has the advantage of low cost. Wireless power supply allows the display device 4 and the support assembly 2 to be connected without direct contact, eliminating exposed power cords and making the desktop tidier. In practical applications, one or more combinations of these electrical connection methods can be selected.

[0182] In one specific embodiment, the support assembly 2 is shaped as a polyhedron composed of multiple sides, such as a rectangle or a square, meaning that the orthographic projection of the support assembly 2 onto the bearing surface 221 is a rectangle or a square. The display device 4 is typically a rectangular flat plate. Based on this, the support assembly 2 has a first side 214, and the display device 4 has a second side 612. The first side 214 and the second side 612 are connected in a first direction (i.e.,...). Figure 12 The X1 direction shown is relatively set; the first direction is parallel to the image source placement area and parallel to the front-back direction of the eye box area. For example... Figure 13 As shown, the first connecting part 51 is built into the support assembly 2, and an opening 213 corresponding to the first connecting part 51 is provided on the first side 214.

[0183] like Figure 14 As shown, the second connecting part 61 is disposed on the second side 612 of the display device 4, as... Figure 15 As shown, the second connecting part 61 is electrically connected to the first connecting part 51 through the opening 213. The first connecting part 51 and the second connecting part 61 are the electrical interfaces (such as USB-C interface, DC power port) for realizing electrical connection. If the first connecting part 51 is placed outside the outer surface of the support assembly 2, the exposed metal contacts of the interface are directly exposed. Users (especially children) may touch it with their fingers or metal objects (such as keys, pins) out of curiosity, resulting in the risk of electric shock or short circuit. Moreover, the interface is prone to dust accumulation and accidental physical damage. In this embodiment, the first connecting part 51 is built into the support body 21, and an opening 213 corresponding to the first connecting part 51 is opened on the first side 214. This can both hide the interface and realize the electrical connection between the second connecting part 61 and the first connecting part 51 through the opening 213. The opening 213 can also play a certain positioning role in the docking of the second connecting part 61 and the first connecting part 51. As the user places the display device 4 on the bearing surface 221 and pushes the display device 4 into the support body 21, the second connecting part 61 automatically extends into the opening 213 and is electrically connected to the first connecting part 51 while the positioning protrusion 611 and the opening 213 complete the mechanical positioning, thereby realizing "blind insertion" and quick connection, and improving the user experience.

[0184] In some embodiments, the display device includes a display panel that includes a plurality of pixels, such as Figure 16As shown, at least some pixels have a first emission range A1 and a second emission range A2. The first emission range A1 is the space within a preset cone angle range of the principal optical axis O; the second emission range A2 is the space outside the preset cone angle range; the light emission energy of a pixel within the first emission range A1 is greater than the light emission energy within the second emission range A2. The principal optical axis O refers to a reference direction, specifically the normal direction perpendicular to the center point of the display screen plane in display technology. The preset cone angle range is the spatial angle range enclosed by a virtual cone with the principal optical axis O as its central axis. This range is used to divide the emission range of light. The space within the preset cone angle range of the principal optical axis O refers to a pre-defined conical space with a direction perpendicular to the center of the screen as a reference. Light energy is mainly concentrated here to ensure efficient utilization by subsequent optical magnification paths, forming a bright virtual image. The space outside the preset cone angle range refers to all other angular spaces besides the space within the aforementioned preset cone angle range.

[0185] In optical imaging, significant light loss results in the virtual image brightness perceived by the human eye being only a small percentage of the screen's total brightness, such as 10%-20%. To achieve a comfortable virtual image brightness, the original screen brightness needs to be very high. However, achieving high brightness presents significant challenges in terms of power consumption and heat dissipation. Furthermore, as... Figure 17 As shown, large-angle light rays that deviate significantly from the principal optical axis O may bypass the optical path and directly enter the eyes of the observer or bystander. This high-brightness stray light can create severe glare, causing significant discomfort. To address this issue, this application achieves non-uniform light emission with a specific direction by making the light-emitting energy of the pixel in the first emission range A1 greater than that in the second emission range A2. This focuses the light energy within the effective viewing angle, thereby improving light energy utilization and achieving higher brightness with the same power consumption, thus solving the bottleneck problem of virtual image brightness. Simultaneously, by suppressing the energy in the second emission range A2, the source of stray light generation is fundamentally eliminated.

[0186] It should be noted that in practical applications, the angle α between the principal optical axis O (0°) and the side of the cone is less than or equal to ±45°, specifically ±45°, ±35°, ±20°, etc. This angle α refers to half an angle of the cone, that is, the angle between the principal optical axis O (0°) and the side of the cone. Taking an angle α of ±45° between the principal optical axis O (0°) and the side of the cone as an example, the total opening angle of the entire cone is 90°.

[0187] In some embodiments, the display device includes a display panel. The proportion of light energy emitted by the display panel in a first emission range A1 relative to the total energy is a first proportion, and the proportion of light energy emitted by the display panel in a second emission range A2 relative to the total energy is a second proportion. The ratio of the second proportion to the first proportion is 0.3:1. Concentrating almost all the energy in the first emission range A1 (e.g., a ratio much less than 0.3:1) can maximize the brightness of the virtual image and minimize glare, but it may lead to extremely complex optical designs, high costs, and even a sudden drop in brightness when the user's eye moves slightly due to an excessively narrow viewing angle. If the energy in the second emission range A2 is too high (e.g., a ratio close to or exceeding 1:1), it means there is still a large amount of stray light, resulting in poor anti-glare effects and limited improvement in luminous efficiency. Therefore, it is necessary to find the optimal balance between brightness and glare. Based on this, this application, by setting the ratio of the second proportion to the first proportion to 0.3:1, can suppress stray light at excessively wide viewing angles and reduce glare interference that may occur when the display device 4 is used as an image source in a space optical telescope. At the same time, it ensures sufficient and uniform light energy distribution within a preset viewing angle range (e.g., ±45°), so that the brightness of the observed virtual image does not change drastically when the user's eyeball moves normally within the eye box area, thereby maintaining the stability and comfort of visual perception.

[0188] Furthermore, in some embodiments, such as Figure 16 As shown, the display device includes a display panel 41 and a privacy structure 42, which is disposed on the light-emitting side of the display panel 41. The privacy structure 42 includes an optical film 421 and a microstructure array 422 disposed on the optical film 421. The microstructure array 422 includes multiple light-absorbing grids spaced apart, with a light-transmitting gap 423 formed between adjacent light-absorbing grids to allow light to pass through. Light incident on the light-absorbing grids is absorbed. The aforementioned microstructure array 422 constitutes a viewing angle control structure with alternating light-absorbing grids and light-transmitting gaps 423. It has angle selectivity; only when the angle between the direction of light propagation and the grid wall is small enough (i.e., the emission angle is within a preset range) can light pass smoothly through the narrow light-transmitting gap 423 and reach the human eye. When the angle between the direction of light propagation and the grid wall is too large, its light path will be blocked and absorbed by the opaque sidewall of the light-absorbing grid. The aforementioned privacy structure 42 uses direct absorption to handle invalid light. This method can effectively eliminate stray light at large angles, achieving a privacy protection effect, which means controlling the energy distribution range of the emitted light. It is easy to understand that the privacy protection structure 42 can be set on the light-emitting side of the display panel 41, or on the backlight side of the display panel 41, or on both the light-emitting side and the backlight side of the display panel 41.

[0189] The aforementioned privacy screen structure 42, through its light-absorbing grid in the microstructure array 422, can efficiently absorb emitted light from a wide viewing angle, thereby significantly reducing glare caused by direct viewing of the screen when the user deviates from the main viewing angle or when there are bystanders. This greatly improves visual comfort during use and simultaneously enhances the visual privacy of the display. Moreover, by absorbing ineffective light rays whose propagation direction exceeds the first emission range A1 through the privacy screen structure, stray light in the optical path is effectively reduced, allowing the light energy emitted by the backlight module to more concentratedly serve the effective imaging optical path. This objectively improves the utilization efficiency of light energy that can be used to form a virtual image.

[0190] In some embodiments, the display device 4 includes at least two privacy screen structures 42 stacked sequentially along a direction perpendicular to the display surface. The light-absorbing grilles in the microstructure array of one privacy screen structure 42 are spaced apart along a first direction, and the light-absorbing grilles in the microstructure array of the other privacy screen structure 42 are spaced apart along a second direction. The first and second directions are perpendicular to each other and parallel to the display surface of the display device 4. The blind spot for viewing angle control present in a single privacy screen structure, coupled with the mutually perpendicular extension directions of the microstructure arrays of the two privacy screen structures 42, achieves coordinated constraint of the emitted light in two orthogonal dimensions. This optimizes the first emission range A1 from a unidirectional fan-shaped area to a three-dimensional cone-shaped region with a rectangular cross-section, thereby achieving omnidirectional viewing angle control. A clear screen image can only be viewed when the observer is within the three-dimensional cone-shaped region. For observers from any other direction, their line of sight is blocked by the light-absorbing grilles of the privacy screen structure, thereby enhancing the privacy of the displayed content and avoiding visual glare interference caused by observers directly seeing a bright screen, thus comprehensively improving the visual security of the device.

[0191] Furthermore, in some embodiments, the display device further includes a backlight module. For a direct-lit backlight module, it may include a light source array, which includes at least two light source zones. The brightness of different light source zones can be independently adjusted, and each light source zone includes at least one light source. When the displayed content is unevenly bright, the uniform backlight prevents dark areas from truly darkening, resulting in low image contrast, a washed-out image, and a lack of depth. When a portion of the screen displays a dark image, the overall backlight remains fully bright, wasting energy. Simultaneously, the light emitted from dark content areas may become stray light, reflecting within the optical system or directly illuminating the user, creating slight glare and affecting visual comfort and the purity of the virtual image. To address this problem, the backlight module in this application arranges the light sources in an array and divides it into multiple independently addressable and driveable light source zones. In this case, the driving module analyzes the input image signal and generates corresponding light source zone brightness control signals based on the brightness information of different areas of the image. For bright areas in the image, the corresponding light source zone is driven to high brightness; for dark areas in the image, the corresponding light source zone is driven to low brightness or even turned off. By correlating the brightness output of the backlight module with local content of the displayed image, high-precision local dimming is achieved. This allows the backlight in the corresponding area to be significantly reduced or turned off when displaying dark scenes, resulting in purer blacks, while allowing bright areas to maintain high brightness. This greatly improves the static contrast and dynamic range of the image, making the image more layered and detailed. Moreover, through zone control, when displaying large areas of dark scenes, the backlight in many zones can be turned off or dimmed, significantly reducing the overall power consumption of the backlight module. At the same time, reducing or eliminating invalid background light output from areas that should display dark content helps reduce the level of stray light within the system, improving the purity of the final virtual image and visual comfort.

[0192] In some embodiments, please refer to Figure 18The space optical telescope also includes at least one prism film 82. The surface of the prism film 82 is provided with a triangular prism structure 821, where the vertex angle b of the triangular cross-section of the triangular prism structure 821 is greater than or equal to 90° and less than or equal to 110°. The initial distribution range of the light emitted from the backlight is very wide, and large-angle light cannot be effectively utilized by the subsequent optical system to form a virtual image, resulting in low light energy utilization. To obtain a sufficiently bright virtual image, it is necessary to increase the backlight power, thus causing power consumption and heat dissipation problems. Moreover, uncontrolled large-angle light may form stray light within the optical system, reducing the contrast and sharpness of the virtual image. To solve this problem, this application utilizes the refraction and total internal reflection effects of at least one prism film 82 to actively control the direction of light, achieving light recovery and focusing. Specifically, for light with a small incident angle, it will directly pass through the prism film interface and be refracted according to Snell's law, and its exit direction is corrected to be closer to the principal optical axis O. For light rays with a large incident angle, when they reach the inclined surface of the triangular prism structure 821 of the prism film 82, the incident angle will be greater than the critical angle for total internal reflection, thus causing total internal reflection. These totally internalized rays are not absorbed or lost, but are reflected back into the backlight cavity. The reflective film at the bottom of the cavity will reflect them again, and this portion of the light has the opportunity to strike the prism film again at a smaller angle and ultimately be utilized.

[0193] Based on this, by ensuring that the vertex angle b of the triangular cross-section of the triangular prism structure 821 is greater than or equal to 90° and less than or equal to 110°, a balance can be struck between light-gathering efficiency and technological feasibility. If the vertex angle b is too small (<90°), the prism is too "sharp," which, while providing strong light-gathering ability, may cause some light within the useful angle range to be totally reflected, thus reducing efficiency. Furthermore, it is more difficult to manufacture, and the sharp point is easily damaged. If the vertex angle b is too large (>110°), the prism is too "blunt," the total internal reflection condition deteriorates, the ability to recover large-angle light is weakened, and the light-gathering effect decreases.

[0194] The prism film 82 of this application, through its unique triangular prism structure 821, recovers and reuses large-angle light emitted from the backlight module through total internal reflection, while simultaneously focusing the transmitted light into the first emission range A1. This greatly improves light energy utilization, resulting in a substantial increase in the axial brightness of the display device and the effective luminous flux available for forming virtual images under the same backlight power consumption, thereby ensuring that the final virtual image has sufficient brightness. Moreover, the prism film 82 effectively converges the original wide-angle light distribution of the backlight into a narrow-angle distribution concentrated near the principal optical axis O, achieving the desired energy distribution ratio between the first emission range A1 and the second emission range A2, providing a physical structural guarantee for reducing stray light and improving visual comfort.

[0195] Furthermore, in some embodiments, such as Figure 19As shown, a direct-lit backlight module includes a light source 81, a prism film 82, and a light-diffusing sheet 83. Light emitted from the light source 81 passes through the light-diffusing sheet 83 and enters the prism film 82. The light source 81 includes multiple LEDs 811, which are spatially discretely distributed. Without processing, bright spots and dark areas would appear on the screen, failing to provide uniform background illumination. The light-diffusing sheet 83 includes, for example, a diffusion film containing scattering particles. When light emitted from the discrete light sources enters the light-diffusing sheet 83, it undergoes numerous scattering events. This process disrupts the original spatial distribution of the light, transforming a light source composed of multiple bright spots into a planar light source with uniform brightness and a smooth surface. This application utilizes a light-diffusing sheet 83 positioned along the light emission path of the light source to fully scatter and mix the discretely distributed light sources 81, effectively eliminating localized light spots and dark areas. This creates a planar light source with highly uniform brightness distribution across the entire effective area of ​​the display panel, providing an ideal working interface for the downstream prism film 82. This allows the prism film 82 to more effectively deflect angles and recover light, thereby achieving simultaneous optimization of the backlight module in terms of both "uniformity" and "directivity." It is understood that in embodiments without a prism film, the light emitted from the light source passes through the light-diffusing sheet before entering the display panel.

[0196] In some embodiments, please refer to Figure 20 A collimating element array 84 is also provided between the light source 81 and the light homogenizer 83. The light source 81 includes multiple LEDs 811, and each LED 811 corresponds one-to-one with a collimating element 841 in the collimating element array 84. The distance D between the light-emitting surface of the collimating element array 84 and the light-incident surface of the light homogenizer 83 ranges from 2mm to 10mm. This distance D can be, for example, a minimum distance or an average distance. For direct-lit backlight modules, the light emitted by the LEDs is emitted at a large angle, resulting in low energy utilization. To solve this problem, such as... Figure 21 and Figure 22 As shown, this application employs collimating elements 841 corresponding one-to-one with LED lamps 811. Each collimating element 841 treats its corresponding LED lamp 811 as a point light source, and through the principle of refraction or reflection, converges the wide-angle light emitted by it into a beam of approximately parallel light or a narrow beam with a significantly reduced divergence angle. This can modify the spatial distribution of light from the source, changing it from "diffuse" to "beamed". Based on this, by making the distance D between the light-emitting surface of the collimating element array 84 and the light-incident surface of the homogenizer 83 range from 2mm to 10mm, the divergence angle can be reduced and the energy utilization rate can be improved.

[0197] In some embodiments, the collimating element array 84 includes a plano-convex lens, a biconvex lens (such as...) Figure 21 As shown), TIR lens (such as Figure 23 (as shown) or reflector cup (such as) Figure 24 At least one of the following (shown).

[0198] In some embodiments, such as Figure 25 As shown, the light source 81 includes a blue Mini LED lamp and a quantum dot material 85 for converting the blue light emitted by the blue Mini LED lamp into white light. This quantum dot material 85, for example, is a quantum dot film, disposed between the light-diffusing sheet 83 and the display panel 80. Conventional LED lamps combined with phosphors have limitations in color gamut and contrast. While white Mini LED lamps can achieve fine-grained local dimming, their white light spectrum is typically generated by blue LED lamps exciting yellow phosphors, resulting in problems such as insufficient cyan and red light, thus limiting color performance. To address this issue, this application uses an array of blue Mini LED lamps as a backlight source, which allows for fine and independent local brightness control, thereby achieving high dynamic contrast (HDR). Each Mini LED pixel emits high-brightness, pure blue light, serving as an ideal pump source for exciting quantum dots. Furthermore, the quantum dot material 85, containing a certain ratio of red and green quantum dots, is disposed between the light-diffusing sheet 83 and the display panel 80. When the blue light emitted by the Mini LED lamp, homogenized by the homogenizer 83, shines on the quantum dot material 85, the quantum dots are efficiently excited and emit pure red and green light with narrow half-widths. This red and green light mixes with the remaining blue light that has been transmitted to generate white light with a wide color gamut and high color purity.

[0199] The architecture of blue Mini LED lights and quantum dot materials separates light control from color conversion, retaining the advantages of Mini LED lights such as local dimming and high contrast, while achieving excellent color performance through quantum dot materials. Simultaneously, the quantum dot materials are placed downstream of the light homogenizer, operating away from the LED heat source, resulting in lower temperatures and more uniform light intensity, significantly improving the long-term reliability and luminous efficiency stability of the quantum dot materials.

[0200] Furthermore, in embodiments where the light source 81 includes a blue Mini LED lamp, the backlight module also includes a red-green reflective film 87 disposed between the light-diffusing sheet 83 and the quantum dot material 85. The red-green reflective film 87 is a dichroic optical film that allows the excitation blue light emitted by the lower Mini LED to penetrate almost without loss and reach the quantum dot material 85, exciting the quantum dots to emit light. The red-green reflective film 87 can also reflect the red and green light generated after the quantum dots are excited, as well as the red and green light reflected back from the upper interface, preventing them from escaping downwards and being lost. By recovering the downward red and green light that would otherwise be lost, it has the opportunity to contribute to the light emitted from the screen. This means that under the same Mini LED blue light driving power, the overall brightness of the screen and the intensity of the red and green light components are improved, and it helps to balance the distribution of red, green, and blue light across the entire screen area, reducing color unevenness or spots caused by minor differences in quantum dot distribution or optical path, thereby obtaining a purer and more uniform white backlight.

[0201] In embodiments where light source 81 includes a blue Mini LED lamp, such as Figure 25 As shown, the backlight module also includes a BEF film 86 disposed on the collimating element array 84 away from the light source 81. The BEF film 86 can be used to converge the light angle and improve axial brightness. Of course, in practical applications, the backlight module also includes a DBEF film disposed on the collimating element array 84 away from the light source 81, and at least one of the BEF film and DBEF film can be selected according to specific needs.

[0202] In other embodiments, such as Figure 26 As shown, the light source 81' includes a white LED lamp; the backlight module also includes a light-diffusing sheet 83, a BEF film 86, and a DBEF film 88 disposed on the collimating element array 84 away from the light source 81'. Even after passing through the collimating element array 84 and the light-diffusing sheet 83, the emitted light may still have a certain angular distribution and is not ideal parallel light. Moreover, the working principle of the liquid crystal display panel requires the incident light to be linearly polarized. The light source 81' emits unpolarized light (natural light), and when it passes through the lower polarizer of the liquid crystal display panel, theoretically nearly half of the light energy (the polarization component perpendicular to the polarization axis) will be absorbed, causing huge inherent light loss.

[0203] The surface of the BEF film 86 has a parallel arrangement of microscopic prism structures. When light from the light homogenizer 83 is incident on the BEF film 86 at a certain angle, the prism structure deflects the larger angle light to a direction closer to the principal optical axis O through refraction and total internal reflection. At the same time, it reflects the large angle light that cannot be used back to the backlight cavity for recycling, thereby further tightening the light emission angle. This significantly improves the axial (front-view) brightness of the screen without increasing the power consumption of the light source.

[0204] The DBEF film 88 is typically composed of multiple layers of reflective polarizing enhancement films. It is a reflective polarizer based on multilayer optical interference technology, used to achieve polarization-based beam splitting. Specifically, the transmission axis of the DBEF film 88 is aligned with the transmission axis of the lower polarizer of the display panel 80, allowing polarized light (P-light) aligned with the transmission axis of the lower polarizer of the liquid crystal display panel to pass directly. Meanwhile, polarized light (S-light) perpendicular to the transmission axis is reflected back. The reflected S-light undergoes diffuse reflection within the backlight cavity, causing its polarization direction to become randomized. A portion of this S-light reverts to P-light and has a chance to pass through the DBEF film 88 and the lower polarizer of the liquid crystal display panel. This process can be repeated multiple times. Through this "recycling-reuse" mechanism, the DBEF film can recover most of the light energy that would otherwise be absorbed by the lower polarizer in traditional backlighting, thereby improving the overall luminous efficiency of the backlight.

[0205] In some embodiments, such as Figure 27 and Figure 28 As shown, for a side-lit backlight module, it includes: a light guide plate 93, a light source 91 disposed on the light-incident side of the light guide plate 93, a coupling structure 92, and light-collecting dots 932 formed on the light-emitting surface of the light guide plate 93. The coupling structure 92 is disposed between the light source 91 and the light-incident side of the light guide plate 93, and is used to collimate the light emitted by the light source 91 and couple it into the light guide plate 93. The light-collecting dots 932 formed on the light-emitting surface of the light guide plate 93 are wedge-shaped structures. The wedge-shaped structure has intersecting first surfaces 932a and second surfaces 932b. The angle between the first surface 932a and the light-emitting surface of the light guide plate 93 is a first angle β, and the angle between the second surface 932b and the light-emitting surface of the light guide plate 93 is a second angle γ. The first angle β is less than or equal to the second angle γ.

[0206] The light emitted from the display device suffers significant light loss during reflection after passing through the magnification imaging optical path. This necessitates high brightness from the display device itself, but conventional methods of increasing brightness lead to a surge in power consumption and heat dissipation. Furthermore, if the display device's light emission angle (viewing angle) is too large, at high brightness levels, bystanders or users outside the optical path may directly see the bright screen when tilting their heads, causing glare and discomfort. Simultaneously, large-angle light does not participate in imaging, resulting in energy waste. To address this issue, this application employs a side-lit backlight module, which can output high axial brightness and a narrowed light emission angle range with limited power consumption, simultaneously meeting the magnification imaging optical path's requirement for high virtual image brightness and strict requirements for controlling light leakage outside the optical path.

[0207] This application pre-collimates the light emitted from the light source 91 by providing a coupling structure 92 between the light source 91 and the light-incident side of the light guide plate 93. Combined with the light-collecting dots 932 formed on the light-emitting surface of the light guide plate 93, their wedge-shaped structure allows for angle selection and deflection of the light. Specifically, as... Figure 29As shown, the wedge-shaped structure has intersecting first surfaces 932a and second surfaces 932b. Since the first angle β between the first surface 932a and the light-emitting surface of the light guide plate 93 is relatively small, it utilizes total internal reflection to deflect and guide the collimated light propagating inside the light guide plate 93 to the second surface 932b. Conversely, the second angle γ between the second surface 932b and the light-emitting surface of the light guide plate 93 is relatively large, and the incident angle of the light rays striking the second surface 932b is designed to be less than the critical angle for total internal reflection. Therefore, the light rays satisfy the refraction condition here, thus exiting from the light guide plate 93 and becoming the useful outgoing light of the screen. The larger second angle γ is designed to deflect the direction of the outgoing light rays, increasing the angle between the outgoing light rays and the light-emitting surface of the light guide plate 93 (i.e., the screen normal), thus confining the refraction angle of the light rays near the normal. The aforementioned light-collecting dots 932 can convert the light energy propagating over a wide area within the light guide plate into a beam concentrated near the normal direction, thereby simultaneously achieving a narrowing of the light-emitting angle and an increase in axial brightness. This can simultaneously meet the requirements of the magnified imaging optical path for high virtual image brightness and strict requirements for controlling external light leakage from the optical path.

[0208] The coupling structure 92 that implements the above-mentioned collimation function includes, for example, a collimation element array, the structure of which can be coupled with... Figures 20 to 22 The collimating element arrays shown have the same structure. The light source 91 includes multiple LEDs, and each LED corresponds one-to-one with a collimating element in the collimating element array. The distance between the light-emitting surface of the collimating element array and the light-incident surface 931 of the light guide plate 93 is less than 2 mm. In a side-lit backlight module, if the light from a traditional LED strip (with a large divergence angle) is directly coupled into the light guide plate from the side, the initial propagation direction of the light within the light guide plate will be divergent, fundamentally destroying the possibility of achieving small-angle light emission. To address this, this application equips each LED with an independent collimating element, enabling independent optical management of the point light source and reshaping the light emitted by each LED into a collimated beam with a small divergence angle. Furthermore, by ensuring that the distance between the light-emitting surface of the collimating element array and the light-incident surface of the light guide plate is less than 2 mm, most of the light energy can directly enter the light guide plate, maximizing coupling efficiency.

[0209] In some embodiments, such as Figure 29 As shown, the angle θ between the light-incident surface 931 and the light-exit surface of the light guide plate 93 is greater than or equal to 30° and less than or equal to 40°. Figure 30 As shown, the included angle θ can ensure that the propagation paths of the two beams (i.e., the upper beam and the lower beam) refracted from the incident surface 931 are seamlessly connected within the light guide plate and do not interfere with each other, thereby avoiding local bright and dark stripes caused by overlapping light paths at the source and providing an ideal light field input for subsequent uniform light acquisition.

[0210] In some embodiments, the width of the collimated beam emitted from the coupling structure 92 is greater than or equal to the thickness of the light guide plate 93. This ensures that the size of the collimated beam completely covers the incident surface (i.e., the thickness direction) of the light guide plate, thereby avoiding edge dark areas or wasted light energy due to incomplete beam coverage, and ensuring that all available light energy is introduced and participates in the subsequent propagation and light emission process.

[0211] In some embodiments, the second included angle γ between the second surface 932b and the light-emitting surface of the light guide plate 93 is greater than or equal to 80° and less than or equal to 90°. The larger the second included angle γ (the closer it is to 90°), the closer the direction of light emitted from this surface is to perpendicular to the light-emitting surface of the light guide plate (i.e., the screen normal), according to the law of refraction. Therefore, by limiting the second included angle γ to a high value range of 80°-90°, the axial deflection of the light emitted from this surface can be maximized, thereby improving axial brightness and narrowing the effective viewing angle.

[0212] In some embodiments, such as Figure 31 As shown, the backlight module also includes a direction deflection film 94 disposed on the light-emitting side of the light guide plate 93, used to adjust the direction of the light emitted through the light-collecting dots 932 to be perpendicular to the light-emitting surface of the light guide plate 93. Although the wedge-shaped structure of the light-collecting dots 932 has significantly deflected the light towards the normal direction, due to limitations in optical principles and structural design, the principal direction of the emitted light will usually still have a residual angle with the strictly perpendicular direction. In order to eliminate this angle, this application provides a direction deflection film 94 on the light-emitting side of the light guide plate 93, which can fine-tune and calibrate the angle of the emitted light after being deflected by the second surface 932b, so as to eliminate its residual angle deviation and ensure that the energy of the beam emitted from the screen is accurately and symmetrically concentrated in a direction perpendicular to the screen surface.

[0213] Directional deflection film 94 is typically a wedge-shaped film. The transparent optical film, the wedge angle It has the ability to deflect light. When light rays emitted from the wedge-shaped structure of the light-collecting dot 932 at a certain angle (not perpendicular) are incident on the direction-deflecting film 94, the light rays will undergo two refractions at its incident and exit interfaces. This is achieved by designing the wedge angle... The refractive index allows adjustment of the light deflection angle, ensuring that the emitted light, after two refractions, is perpendicular to the light-emitting surface of the light guide plate 93 (i.e., the screen surface). Furthermore, in some embodiments, the wedge angle of the direction deflection film 94... The angle is greater than or equal to 40° and less than or equal to 50°.

[0214] In some embodiments, such as Figure 32As shown, for a side-lit backlight module, it may also include a light-diffusing sheet 83, a BEF film 86, and a DBEF film 88 disposed on the side of the direction deflection film 94 away from the light guide plate 93. The functions of these films are the same as those in the direct-lit backlight module described above, and will not be repeated here.

[0215] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this application, and this application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this application, and these modifications and improvements are also considered to be within the scope of protection of this application.

Claims

1. A space optical telescope, characterized in that, include: A magnifying imaging optical path, a display device, and a support assembly are provided, wherein the magnifying imaging optical path is used to adjust the direction of at least a portion of the image light emitted from the display device, so that the image light is incident on the eye box area corresponding to the space optical telescope, so that when the user's eye is in the eye box area, he / she sees a magnified virtual image corresponding to the content displayed by the display device; The support assembly is used to support the magnified imaging optical path; The display device is detachably connected to the support assembly.

2. The space optical telescope according to claim 1, characterized in that, The display device includes a liquid crystal display panel and a backlight module, wherein the ratio of the blue light energy in the 400nm to 500nm band to the total visible light energy in the 400nm to 780nm band of the light emitted by the backlight module is R, and 15%≤R≤25%, or 18%≤R≤22%.

3. The space optical telescope according to claim 1, characterized in that, The display device includes a liquid crystal display panel, a backlight module, and a driving module. The driving module is used to turn off or reduce the brightness of all blue sub-pixels output by the liquid crystal display panel and dynamically increase the brightness of red and green sub-pixels when preset conditions are met.

4. The space optical telescope according to claim 1, characterized in that, The display device includes a reflective display panel, which includes an electrically conductive microcapsule layer configured to change the distribution of microparticles under the action of an electric field to achieve display.

5. The space optical telescope according to any one of claims 1-4, characterized in that, The display device includes a liquid crystal display panel and a backlight module, wherein the light emitted by the backlight module is full-spectrum light, the spectral continuity index of the full-spectrum light is Cs, and Cs≥50%, wherein Cs is the ratio of the overlapping area of ​​the spectral energy distribution of the test light source and the standard light source in the wavelength range of 400nm to 780nm to the total spectral area of ​​the standard light source.

6. The space optical telescope according to claim 1, characterized in that, The display device includes a liquid crystal display panel, which includes color filters, wherein the thickness of the red, green, and blue color filters is in the range of 0.8µm to 1.9µm.

7. The space optical telescope according to claim 1, characterized in that, The screen surface of the display device is provided with a paper-like film, and the surface optical properties of the paper-like film satisfy at least one of the following conditions: Reflectivity less than or equal to 5%; The haze level is greater than or equal to 20% and less than or equal to 40%. Under an incident angle of 60°, the specular gloss is less than 30 GU.

8. The space optical telescope according to claim 1, characterized in that, The screen surface of the display device is provided with a paper-like film, and the surface optical properties of the paper-like film satisfy at least one of the following conditions: Reflectivity less than or equal to 1%; The haze level is greater than or equal to 40% and less than or equal to 60%. Under an incident angle of 85°, the specular gloss is less than 5 GU.

9. The space optical telescope according to claim 1, characterized in that, The screen surface of the display device is provided with a paper-like film, the paper-like film including a substrate and a biomimetic microstructure layer formed on the surface of the substrate, the biomimetic microstructure layer having a surface topology; The arithmetic mean roughness of the surface topology is greater than or equal to 0.3 μm and less than or equal to 2.5 μm; And / or, The average width of the surface topology is greater than or equal to 30 μm and less than or equal to 150 μm.

10. The space optical telescope according to claim 1, characterized in that, The screen surface of the display device is provided with a paper-like film, and the haze value of the paper-like film is 20% to 60%.

11. The space optical telescope according to claim 1, characterized in that, It also includes an ambient light compensation module, which includes: Ambient lighting is provided around the liquid crystal display panel of the display device; An ambient light sensor is used to detect ambient brightness; and The control unit is connected to the ambient light and the ambient light sensor, and is used to adjust the brightness of the ambient light according to the ambient brightness and the display brightness of the display device.

12. The space optical telescope according to claim 1, characterized in that, It also includes a color processing unit for performing dynamic adaptive color mapping, including: Establish the native color gamut boundary model of the liquid crystal display panel of the display device; Dynamically generate the optimal display color gamut based on the input image content; Perform color mapping that preserves hue, compresses saturation, and links brightness.

13. The space optical telescope according to claim 1, characterized in that, The magnified imaging optical path includes a fill light and a control unit. The fill light is used to provide supplemental light to the image source placement area corresponding to the magnified imaging optical path. The support assembly is provided with a first connection part for electrical connection with the display device. The display device is provided with a second connection part that cooperates with the first connection part. The control unit is electrically connected to the first connection part and the fill light. When the control unit detects that the display device is connected to the support assembly, it adjusts the brightness of the fill light.

14. The space optical telescope according to claim 1, characterized in that, The display device includes a display panel, the display panel includes a plurality of pixels, at least some of the pixels have a first emission range and a second emission range, the first emission range being a space within a preset cone angle range of the main optical axis; The second emission range is the space outside the preset cone angle range; The light emission energy of the pixel in the first emission range is greater than the light emission energy in the second emission range.

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