Three-dimensional reflective display device

Abstract

A three-dimensional reflective display device includes a reflective display panel, a lens array disposed on the reflective display panel, and a front light module disposed on the lens array. The reflective display panel comprises a plurality of pixel structures, and each pixel structure comprises a left eye pixel and a right eye pixel. The lens array comprises a plurality of cylindrical lenses which extend in the first direction and are arranged in the second direction perpendicular to the first direction, and the cylindrical lenses correspond to the pixel structures respectively. The front light module comprises a first front light assembly and a second front light assembly arranged between the lens array and the first front light assembly. The first front light assembly and the second front light assembly each comprise a light guide plate and a light source arranged on the light inlet face of the light guide plate, and the light inlet face of the first front light assembly faces the light inlet face of the second front light assembly in the second direction. According to the three-dimensional reflective display device, obvious bright and dark fringes can be prevented from appearing on a picture, and then the display quality is improved.

Description

Technical Field

[0001] The present invention relates to a three-dimensional reflective display device, and more particularly to a three-dimensional reflective display device comprising two front light components each comprising a light source and a light guide plate. Background Art

[0002] With the development of technology, in response to the demand for displaying more realistic images, three-dimensional (3D) display devices that can display stereoscopic images have been developed. Three-dimensional display devices can be divided into glasses-type three-dimensional display devices that require glasses to be viewed and naked-eye three-dimensional display devices that do not require glasses to be viewed. The three-dimensional imaging method of the naked-eye three-dimensional display device can mainly include a parallax barrier method and a lenticular lens method.

[0003] Therefore, the reflective display device can be used with a cylindrical lens array as a three-dimensional reflective display device, and the three-dimensional reflective display device with a front light module can further provide sufficient lighting for use in situations where light is insufficient. However, due to the limitation of the light output angle of the front light module, the light will form a dark area after passing through the cylindrical lens array, causing obvious light and dark stripes to appear on the screen, thereby resulting in poor display quality. Summary of the invention

[0004] At least one embodiment of the present invention provides a three-dimensional reflective display device, which can reduce the probability of dark areas formed after light passes through a cylindrical lens array, thereby avoiding obvious bright and dark stripes on the screen, thereby improving display quality.

[0005] The three-dimensional reflective display device provided by at least one embodiment of the present invention comprises a reflective display panel, a lens array and a front light module. The reflective display panel comprises a plurality of pixel structures, and each pixel structure comprises a left-eye pixel and a right-eye pixel. The lens array is disposed on the reflective display panel and comprises a plurality of cylindrical lenses, which extend along a first direction and are arranged along a second direction perpendicular to the first direction and correspond to the pixel structures respectively. The front light module is disposed on the lens array and comprises a first front light component and a second front light component. The first front light component comprises a first light source and a first light guide plate, the first light guide plate having a first light incident surface, and the first light source is disposed on the first light incident surface. The second front light component is disposed between the lens array and the first front light component and comprises a second light source and a second light guide plate, the second light guide plate having a second light incident surface, the second light source is disposed on the second light incident surface, and the first light incident surface faces the second light incident surface in the second direction.

[0006] In at least one embodiment of the present invention, the first light guide plate has a first upper surface away from the second light guide plate, the first upper surface includes a plurality of first microstructures, and the second light guide plate has a second upper surface adjacent to the first light guide plate, the second upper surface includes a plurality of second microstructures.

[0007] In at least one embodiment of the present invention, the first microstructures and the second microstructures extend along the first direction, and the cross-sectional shapes of each of the first microstructures and each of the second microstructures perpendicular to the first direction are mirror-symmetrical.

[0008] In at least one embodiment of the present invention, each of the first microstructures is a recessed structure, each of the first microstructures has a first light-facing surface adjacent to the first light-entering surface and a first backlight surface away from the first light-entering surface, the first light-facing surface is inclined at a first light-facing angle relative to the first light guide plate, and the first light-facing angle is respectively between 20 and 40 degrees, and the first backlight surface is inclined at a first backlight angle relative to the first light guide plate, and the first backlight angle is respectively between 60 and 89 degrees.

[0009] In at least one embodiment of the present invention, the second microstructure is a recessed structure, and each of the second microstructures has a second light-facing surface adjacent to the second light-entering surface and a second backlight surface away from the second light-entering surface. The second light-facing surface is tilted at a second light-facing angle relative to the second light guide plate, and the second light-facing angle is respectively between 20 and 40 degrees. The second backlight surface is tilted at a second backlight angle relative to the second light guide plate, and the second backlight angle is respectively between 60 and 89 degrees.

[0010] In at least one embodiment of the present invention, the three-dimensional reflective display device further includes a first adhesive layer, which is disposed on the first front light component, the refractive index of the first adhesive layer is smaller than the refractive index of the first light guide plate, each of the first microstructures is a recessed structure, and the first adhesive layer is filled in the multiple first microstructures.

[0011] In at least one embodiment of the present invention, the three-dimensional reflective display device further includes a second adhesive layer, which is arranged between the first front light component and the second front light component, the refractive index of the second adhesive layer is smaller than the refractive index of the second light guide plate, each of the second microstructures is a recessed structure, and the second adhesive layer is filled in the multiple second microstructures.

[0012] In at least one embodiment of the present invention, the three-dimensional reflective display device further includes an intermediate layer disposed between the lens array and the second front light component, the intermediate layer is an air layer or an adhesive layer, and the refractive index of the adhesive layer is smaller than the refractive index of the second light guide plate.

[0013] In at least one embodiment of the present invention, the refractive index of the first adhesive layer, the refractive index of the second adhesive layer, and the refractive index of the adhesive layer are less than 1.43.

[0014] In at least one embodiment of the present invention, the lens array has a height on a normal line of the reflective display panel and a pitch in the second direction, and a ratio of the height to the pitch is between 0.08 and 0.3. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a cross-sectional schematic diagram of a three-dimensional reflective display device according to at least one embodiment of the present invention;

[0016] Figure 2A is a cross-sectional schematic diagram of a first microstructure of at least one embodiment of the present invention;

[0017] Figure 2B is a cross-sectional schematic diagram of a second microstructure of at least one embodiment of the present invention;

[0018] Figure 3 is a partial cross-sectional schematic diagram of a lens array according to at least one embodiment of the present invention;

[0019] Figure 4A is a schematic diagram of optical simulation results after light from a front light module of a comparative example of the present invention passes through a lens array;

[0020] Figure 4B It is a schematic diagram of optical simulation results after light of a front light module passes through a lens array according to at least one embodiment of the present invention.

[0021]

Explanation of symbols

[0022] 1: 3D reflective display device

[0023] 10: Reflective display panel

[0024] 11: Pixel structure

[0025] 11L: Left eye pixels

[0026] 11R: Right eye pixel

[0027] 12:Substrate

[0028] 20: Lens array

[0029] 21: Cylindrical lens

[0030] 30: Front light module

[0031] 31: First front light assembly

[0032] 32: Second front light assembly

[0033] 311: First Light Source

[0034] 312: first light guide plate

[0035] 312S1: First light incident surface

[0036] 312S2: First upper surface

[0037] 312S3: First lower surface

[0038] 321: Second light source

[0039] 322: Second light guide plate

[0040] 322S1: Second light incident surface

[0041] 322S2: Second upper surface

[0042] 322S3: Second lower surface

[0043] 40: first adhesive layer

[0044] 50: Second adhesive layer

[0045] 60: Middle layer

[0046] 70: Protective layer

[0047] D1: First direction

[0048] D2: Second direction

[0049] D3: Third direction

[0050] H: Height

[0051] M1: First microstructure

[0052] M2: Second microstructure

[0053] P: Spacing

[0054] S1: First light-facing surface

[0055] S2: First backlight surface

[0056] S3: Second light-facing surface

[0057] S4: Second backlight surface

[0058] Z1, Z1', Z2, Z2': Area

[0059] θ1: The first angle of light

[0060] θ2: first backlight angle

[0061] θ3: The second angle of light

[0062] θ4: Second backlight angle DETAILED DESCRIPTION

[0063] The following is a detailed discussion of the embodiments of the present invention. However, it is to be understood that the embodiments provide many applicable concepts that can be implemented in a variety of specific contexts. The embodiments discussed and disclosed are for illustration only and are not intended to limit the scope of the present invention.

[0064] In order to clearly present the technical features of the present invention, the dimensions of the components in the drawings will be enlarged in a non-proportional manner, and the number of some components will be reduced. Therefore, the description and explanation of the embodiments of the present invention are not limited to the number of components in the drawings and the dimensions and shapes presented by the components, but should cover the dimensions, shapes and deviations of the two caused by actual processes and / or tolerances. For example, the flat surface shown in the drawings may have rough and / or nonlinear features, and the sharp angles shown in the drawings may be rounded. Therefore, the elements presented in the drawings are mainly for illustration, and are not intended to accurately depict the actual shape of the elements, nor are they intended to limit the scope of protection claimed in the present invention.

[0065] The spatially relative terms used in the present invention, such as "below", "under", "above", "on", etc., are for the purpose of facilitating the description of the relative relationship between one element or feature and another element or feature, as shown in the figure. The true meaning of these spatially relative terms includes other orientations. For example, when the figure is flipped up and down 180 degrees, the relationship between one element and another element may change from "below" or "under" to "above" or "on". In addition, the spatially relative descriptions used in the present invention should also be interpreted in the same way.

[0066] It should be understood that, although the present invention may use the terms "first", "second", "third" and the like to describe various elements or features, these elements or features should not be limited by these terms. These terms are mainly used to distinguish one element from another element, or one feature from another feature. In addition, the term "or" used in the present invention may include any one or more combinations of the associated listed items depending on the actual situation.

[0067] In addition, the present invention may be implemented or applied through other different specific embodiments, and the details of the present invention may also be combined, modified and changed in various embodiments based on different viewpoints and applications without departing from the concept of the present invention.

[0068] Figure 1 3D reflective display device 1 includes a reflective display panel 10, a lens array 20 and a front light module 30. The reflective display panel 10 includes a plurality of pixel structures 11, and each pixel structure 11 includes a left eye pixel 11L and a right eye pixel 11R.

[0069] The lens array 20 is disposed on the reflective display panel 10 and includes a plurality of cylindrical lenses 21 . The cylindrical lenses 21 extend along a first direction D1 and are arranged along a second direction D2 perpendicular to the first direction D1 and correspond to the pixel structures 11 respectively.

[0070] The front light module 30 is disposed on the lens array 20, and includes a first front light component 31 and a second front light component 32. The first front light component 31 includes a first light source 311 and a first light guide plate 312, the first light guide plate 312 has a first light incident surface 312S1, and the first light source 311 is disposed on the first light incident surface 312S1. The second front light component 32 is disposed between the lens array 20 and the first front light component 31, and includes a second light source 321 and a second light guide plate 322, the second light guide plate 322 has a second light incident surface 322S1, the second light source 321 is disposed on the second light incident surface 322S1, and the first light incident surface 312S1 faces the second light incident surface 322S1 in the second direction D2.

[0071] Since the front light module includes two front light components (e.g., the first front light component 31 and the second front light component 32), and the light sources of the two front light components (e.g., the first light source 311 and the second light source 321) are respectively disposed on opposite sides of the cylindrical lens array (e.g., the lens array 20), the bright and dark areas formed by the outgoing light of the two front light components after passing through the cylindrical lens array will complement each other, which can reduce the probability of forming a dark area after the light passes through the cylindrical lens array, thereby avoiding obvious bright and dark stripes on the screen, thereby improving the display quality.

[0072] like Figure 1 As shown, the left-eye pixels 11L and the right-eye pixels 11R are arranged alternately along the second direction D2, and the cylindrical lenses 21 of the lens array 20 overlap with the pixel structures 11 respectively in the normal line of the reflective display panel 10 (i.e., the third direction D3 perpendicular to the first direction D1 and the second direction D2). In addition, the first light source 311, the lens array 20 and the second light source 321 are arranged in sequence along the second direction D2, that is, the first light source 311 and the second light source 321 are respectively arranged on opposite sides of the lens array 20 in the second direction D2.

[0073] In some embodiments, the left-eye pixel 11L and the right-eye pixel 11R of the pixel structure 11 respectively display images that can be perceived by the left eye and the right eye of the viewer, and the displayed images of the left-eye pixel 11L and the right-eye pixel 11R are refracted by the cylindrical lens 21 of the lens array 20 to have a specific angle, so that the displayed image of the left-eye pixel 11L can be focused on the left eye of the viewer, and the displayed image of the right-eye pixel 11R can be focused on the right eye of the viewer, thereby displaying a stereoscopic image.

[0074] Please continue reading Figure 1The three-dimensional reflective display device 1 further includes a first adhesive layer 40, a second adhesive layer 50, an intermediate layer 60 and a protective layer 70. The first adhesive layer 40 is disposed on the first front light component 31, and the refractive index of the first adhesive layer 40 is less than the refractive index of the first light guide plate 312. The second adhesive layer 50 is disposed between the first front light component 31 and the second front light component 32, and the refractive index of the second adhesive layer 50 is less than the refractive index of the second light guide plate 322. The intermediate layer 60 is disposed between the lens array 20 and the second front light component 32, and the intermediate layer 60 can be an air layer or an adhesive layer, and the refractive index of the adhesive layer is less than the refractive index of the second light guide plate 322.

[0075] In addition, the refractive index of the first adhesive layer 40 may also be smaller than the refractive index of the second light guide plate 322, and the refractive index of the second adhesive layer 50 and the refractive index of the intermediate layer 60 which is an adhesive layer may also be smaller than the refractive index of the first light guide plate 312. Since the refractive index of the adhesive layer or the air layer is smaller than the refractive index of the light guide plate, the front light module may have a better light output angle, thereby improving the light output efficiency.

[0076] The protective layer 70 is disposed on the first adhesive layer 40. The first adhesive layer 40 is used to adhere the first light guide plate 312 and the protective layer 70. The second adhesive layer 50 is used to adhere the second light guide plate 322 and the first light guide plate 312. If the intermediate layer 60 is an adhesive layer, it can be used to adhere the lens array 20 and the second light guide plate 322. In other embodiments, if the intermediate layer 60 is an air layer, the three-dimensional reflective display device 1 may further include a frame glue (not shown) disposed between the lens array 20 and the second front light assembly 32 and located at the edge of the lens array 20, so as to adhere the lens array 20 and the second light guide plate 322.

[0077] In detail, Figure 1 As shown, the first light guide plate 312 has a first upper surface 312S2 away from the second light guide plate 322 and a first lower surface 312S3 opposite to the first upper surface 312S2, that is, the first lower surface 312S3 is closer to the second light guide plate 322 than the first upper surface 312S2, and the second light guide plate 322 has a second upper surface 322S2 adjacent to the first light guide plate 312 and a second lower surface 322S3 opposite to the second upper surface 322S2, that is, the second lower surface 322S3 is farther away from the first light guide plate 312 than the second upper surface 322S2.

[0078] The first adhesive layer 40 is disposed on the first upper surface 312S2 and adhered to the first upper surface 312S2, the second adhesive layer 50 is disposed between the first lower surface 312S3 and the second upper surface 322S2 and adhered to the first lower surface 312S3 and the second upper surface 322S2, and if the intermediate layer 60 is an adhesive layer, it is disposed on the second lower surface 322S3 and adhered to the second lower surface 322S3.

[0079] In some embodiments, the materials of the first adhesive layer 40, the second adhesive layer 50 and the intermediate layer 60 which is an adhesive layer can be optical clear adhesive (OCA), optical clear resin (OCR) and / or other suitable materials. The refractive index of the first adhesive layer 40, the second adhesive layer 50 and the intermediate layer 60 which is an adhesive layer is less than 1.43. Since the refractive index of the aforementioned adhesive layer is less than 1.43, the front light module can have a better light output angle, thereby improving the light output efficiency.

[0080] In addition, the protective layer 70 may be a transparent substrate, such as a glass plate or a transparent plastic plate, and the material of the transparent plastic plate may be polyethylene terephthalate (PET), poly(methyl methacrylate) (PMMA), polycarbonate (PC), cyclic olefin copolymer (COC) or cyclic olefin polymer (COP).

[0081] In some embodiments, the reflective display panel 10 may be an electrophoretic display panel or an electrowetting display panel. Figure 1 As shown, the reflective display panel 10 further includes a substrate 12, and the pixel structures 11 are disposed on the substrate 12, and the substrate 12 has a reflective function. In addition, the first light source 311 and the second light source 321 can be a light bar, and the light bar includes a circuit board and a plurality of light-emitting elements (not shown) disposed on the circuit board. In some embodiments, the light-emitting element can be a light emitting diode (LED).

[0082] Figure 2A is a cross-sectional schematic diagram of a first microstructure according to at least one embodiment of the present invention. Figure 2B is a cross-sectional schematic diagram of a second microstructure of at least one embodiment of the present invention. Figure 2A and Figure 2B , the first upper surface 312S2 of the first light guide plate 312 includes a plurality of first microstructures M1, and the second upper surface 322S2 of the second light guide plate 322 includes a plurality of second microstructures M2. It should be understood that although Figure 2A and Figure 2B Only one first microstructure M1 and one second microstructure M2 are respectively illustrated, but the first upper surface 312S2 and the second upper surface 322S2 not shown in the drawings may also include other first microstructures M1 and second microstructures M2, respectively.

[0083] like Figure 2A As shown, the first microstructure M1 is a recessed structure, and the first microstructure M1 has a first light-facing surface S1 adjacent to the first light-entering surface 312S1 and a first backlight surface S2 away from the first light-entering surface 312S1. The first light-facing surface S1 is inclined at a first light-facing angle θ1 relative to the first light guide plate 312, and the first light-facing angle θ1 is respectively between 20 and 40 degrees (including the end values), and the first backlight surface S2 is inclined at a first backlight angle θ2 relative to the first light guide plate 312, and the first backlight angle θ2 is respectively between 60 and 89 degrees (including the end values), that is, the first light-facing angle θ1 is smaller than the first backlight angle θ2.

[0084] like Figure 2B As shown, the second microstructure M2 is a recessed structure, and the second microstructure M2 has a second light-facing surface S3 adjacent to the second light-entering surface 322S1 and a second backlight surface S4 away from the second light-entering surface 322S1. The second light-facing surface S3 is inclined at a second light-facing angle θ3 relative to the second light guide plate 322, and the second light-facing angle θ3 is respectively between 20 and 40 degrees (including the end value), and the second backlight surface S4 is inclined at a second backlight angle θ4 relative to the second light guide plate 322, and the second backlight angle θ4 is respectively between 60 and 89 degrees (including the end value), that is, the second light-facing angle θ3 is smaller than the second backlight angle θ4.

[0085] These first microstructures M1 and these second microstructures M2 extend along the first direction D1 and are arranged along the second direction D2. In some embodiments, these first microstructures M1 are arranged at intervals along the second direction D2, and / or these second microstructures M2 are arranged at intervals along the second direction D2, that is, there is a gap between any two adjacent first microstructures M1 and / or between any two adjacent second microstructures M2. In other embodiments, these first microstructures M1 are arranged continuously along the second direction D2, and / or these second microstructures M2 are arranged continuously along the second direction D2, that is, there is no gap between any two adjacent first microstructures M1 and / or between any two adjacent second microstructures M2.

[0086] In addition, the first light-facing angle θ1 of the first microstructure M1 may be substantially equal to the second light-facing angle θ3 of the second microstructure M2, and the first backlight angle θ2 of the first microstructure M1 may be substantially equal to the second backlight angle θ4 of the second microstructure M2. Figure 2A and Figure 2B As shown, the cross-sectional shapes of the first microstructure M1 and the second microstructure M2 perpendicular to the first direction D1 are mirror-symmetrical.

[0087] Through the angle design of the first microstructure M1 and the second microstructure M2, the front light module can have a better light output angle, thereby improving the light output efficiency. In addition, since the cross-sectional shapes of the first microstructure M1 and the second microstructure M2 perpendicular to the first direction D1 are mirror-symmetrical, the possibility of the light emitted from the first front light component 31 and the second front light component 32 forming the light and dark areas complementing each other after passing through the lens array 20 can be increased, further reducing the probability of the light forming a dark area after passing through the lens array 20, so as to effectively avoid the obvious light and dark stripes on the screen, thereby improving the display quality.

[0088] However, the present invention is not limited to this. In other embodiments, the cross-sectional shapes of the first microstructure M1 and the second microstructure M2 perpendicular to the first direction D1 may not be mirror-symmetrical, that is, the first light-facing angle θ1 of the first microstructure M1 is not equal to the second light-facing angle θ3 of the second microstructure M2, and the first backlight angle θ2 of the first microstructure M1 is not equal to the second backlight angle θ4 of the second microstructure M2.

[0089] It is worth noting that, since the first microstructure M1 is a concave structure, the first adhesive layer 40 pasted on the first upper surface 312S2 will fill in these first microstructures M1, and the second microstructure M2 is a concave structure, so the second adhesive layer 50 pasted on the second upper surface 322S2 will fill in these second microstructures M2. By filling the adhesive layer into the microstructure of the light guide plate, and the refractive index of the adhesive layer is lower than the refractive index of the light guide plate, the front light module can effectively have a better light output angle, thereby improving the light output efficiency.

[0090] Figure 3 is a partial cross-sectional schematic diagram of a lens array according to at least one embodiment of the present invention. Figure 3 The lens array 20 has a height H on the normal line of the reflective display panel 10 (i.e., the third direction D3), and has a pitch P in the second direction D2, and the ratio of the height H to the pitch P is between 0.08 and 0.3 (including the end value). By designing the above ratio range, the three-dimensional reflective display device 1 can have a better optical stereoscopic effect.

[0091] like Figure 3 As shown, the pitch P is the width of the cylindrical lens 21 in the second direction D2. In some embodiments, the width of the cylindrical lens 21 in the second direction D2 (i.e., the pitch P) is substantially equal to the width of the pixel structure 11 in the second direction D2. In other words, the ratio of the height H to the width of the pixel structure 11 in the second direction D2 is also between 0.08 and 0.3 (inclusive).

[0092] Figure 4A It is a schematic diagram of optical simulation results after the light of the front light module of the comparative example of the present invention passes through the lens array. Figure 4BFIG. 1 is a schematic diagram of optical simulation results of light from a front light module according to at least one embodiment of the present invention after passing through a lens array. Figure 4A , which is a schematic diagram of optical simulation results after the outgoing light of the front light module including only one front light component (such as the first front light component 31 or the second front light component 32) passes through the lens array (such as the lens array 20), Figure 4A It can be seen that the area Z1 and the area Z2 are dark stripes and bright stripes arranged alternately, that is, the brightness of the area Z1 is obviously lower than that of the area Z2.

[0093] See also Figure 4B , which is a schematic diagram of the optical simulation result of the outgoing light of the front light module 30 in the three-dimensional reflective display device 1 after passing through the lens array 20, Figure 4B It can be seen that the area Z1' and area Z2' are compared with Figure 4A There are no staggered dark and light lines in the area Z1 and the area Z2, that is, the brightness of the area Z1' is close to the brightness of the area Z2'.

[0094] In summary, the present invention is that the front light module includes two front light components, and the light sources of the two front light components are respectively arranged on opposite sides of the cylindrical lens array. Therefore, the light emitted by the two front light components will form light and dark areas complementary to each other after passing through the cylindrical lens array, which can reduce the probability of forming dark areas after the light passes through the cylindrical lens array, thereby avoiding obvious light and dark stripes on the screen, thereby improving the display quality.

[0095] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. A person having ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the attached claims.

Claims

1. A three-dimensional reflective display device, characterized in that: include: A reflective display panel includes a plurality of pixel structures, and each of the pixel structures includes a left-eye pixel and a right-eye pixel; a lens array, disposed on the reflective display panel and comprising a plurality of cylindrical lenses, wherein the plurality of cylindrical lenses extend along a first direction and are arranged along a second direction perpendicular to the first direction and correspond to the plurality of pixel structures respectively; as well as A front light module is disposed on the lens array and comprises: A first front light assembly, comprising a first light source and a first light guide plate, wherein the first light guide plate has a first light incident surface, and the first light source is disposed on the first light incident surface; as well as A second front light component is disposed between the lens array and the first front light component, and includes a second light source and a second light guide plate, wherein the second light guide plate has a second light incident surface, the second light source is disposed on the second light incident surface, and the first light incident surface faces the second light incident surface in the second direction.

2. The three-dimensional reflective display device according to claim 1, wherein: The first light guide plate has a first upper surface away from the second light guide plate, the first upper surface includes a plurality of first microstructures, and the second light guide plate has a second upper surface adjacent to the first light guide plate, the second upper surface includes a plurality of second microstructures.

3. The three-dimensional reflective display device according to claim 2, wherein: The first microstructures and the second microstructures extend along the first direction, and the cross-sectional shapes of each of the first microstructures and each of the second microstructures perpendicular to the first direction are mirror-symmetrical.

4. The three-dimensional reflective display device according to claim 2, wherein: Each of the first microstructures is a recessed structure, and each of the first microstructures has a first light-facing surface adjacent to the first light-entering surface and a first backlight surface away from the first light-entering surface, wherein each of the first light-facing surfaces is inclined at a first light-facing angle relative to the first light guide plate, and the first light-facing angle is respectively between 20 and 40 degrees, and each of the first backlight surfaces is inclined at a first backlight angle relative to the first light guide plate, and the first backlight angle is respectively between 60 and 89 degrees.

5. The three-dimensional reflective display device according to claim 2, wherein: Each of the second microstructures is a recessed structure, and each of the second microstructures has a second light-facing surface adjacent to the second light-entering surface and a second backlight surface away from the second light-entering surface, wherein each of the second light-facing surfaces is inclined at a second light-facing angle relative to the second light guide plate, and the second light-facing angle is respectively between 20 and 40 degrees, and each of the second backlight surfaces is inclined at a second backlight angle relative to the second light guide plate, and the second backlight angle is respectively between 60 and 89 degrees.

6. The three-dimensional reflective display device according to claim 2, wherein: It also includes a first adhesive layer, which is arranged on the first front light component, and the refractive index of the first adhesive layer is smaller than the refractive index of the first light guide plate, wherein each of the first microstructures is a recessed structure, and the first adhesive layer is filled in the multiple first microstructures.

7. The three-dimensional reflective display device according to claim 6, wherein: It also includes a second adhesive layer, which is arranged between the first front light component and the second front light component, and the refractive index of the second adhesive layer is smaller than the refractive index of the second light guide plate, wherein each of the second microstructures is a recessed structure, and the second adhesive layer is filled in the multiple second microstructures.

8. The three-dimensional reflective display device according to claim 1, wherein: It also includes an intermediate layer, which is arranged between the lens array and the second front light assembly, wherein the intermediate layer is an air layer or an adhesive layer, and the refractive index of the adhesive layer is smaller than the refractive index of the second light guide plate.

9. The three-dimensional reflective display device according to claim 6, 7 or 8, characterized in that: The refractive index of the first adhesive layer, the refractive index of the second adhesive layer, and the refractive index of the adhesive layer are less than 1.

43.

10. The three-dimensional reflective display device according to claim 1, wherein: The lens array has a height on a normal line of the reflective display panel and a pitch in the second direction, and a ratio of the height to the pitch is between 0.08 and 0.3.

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