Partial peep-proof module and partial peep-proof display equipment

Abstract

A partial peep-proof module comprises a peep-proof sheet, a first upper light guide plate and a first light source. The first upper light guide plate is arranged on one side of the peep-proof sheet. The first upper light guide plate comprises a first incident surface, a first emergent surface, a first bottom surface and a plurality of first microstructures, the first microstructures are arranged on one of the first emergent surface and the first bottom surface, and the first upper light guide plate is provided with at least one first block and at least one second block which are adjacent to each other. The average distribution density of the first microstructures in the first block is greater than the average distribution density of the first microstructures in the second block. The first light source is arranged on one side of the first light incident surface. A partial peep-proof display device including a partial peep-proof module is also provided.

Description

Technical Field

[0001] The present invention provides an anti-peeping module and an anti-peeping display device, in particular to a partial anti-peeping module and a partial anti-peeping display device capable of selectively preventing partial peeping. Background Art

[0002] The anti-peeping display device shields the wide-angle light provided by the display device by adding a privacy film or privacy module, so that the light can only be provided to the user at the straight-on angle, to prevent others from viewing the screen content from the sides or other wide angles, and to maintain the user's viewing privacy. However, when using the display device, in addition to avoiding irrelevant bystanders from viewing, the user also has the need to share the screen content with friends or people around them. Since in the existing anti-peeping display devices, the privacy film or privacy module is set inside the anti-peeping display device, or the privacy film is attached to the screen surface of the display device, it is obviously impossible to switch the anti-peeping mode or sharing mode at will. Summary of the invention

[0003] The present invention provides a partial anti-peeping module and a partial anti-peeping display device, which can switch between an anti-peeping mode and a sharing mode at will to meet the needs of users to share partial screen content with friends around them while maintaining viewing privacy.

[0004] An embodiment of the present invention provides a partial privacy protection module, comprising a privacy protection film, a first upper light guide plate and a first light source. The first upper light guide plate is disposed on one side of the privacy protection film, the first upper light guide plate comprises a first light incident surface, a first light emitting surface, a first bottom surface and a plurality of first microstructures, the first bottom surface faces the privacy protection film, the first light emitting surface is opposite to the first bottom surface, the first light incident surface connects the first light emitting surface and the first bottom surface, the first microstructure is disposed on at least one of the first light emitting surface and the first bottom surface, wherein the first upper light guide plate has at least one first block and at least one second block adjacent to each other, the average distribution density of a portion of the first microstructures in the at least one first block is greater than the average distribution density of another portion of the first microstructures in the at least one second block, and the first light source is disposed on one side of the first light incident surface.

[0005] In one embodiment of the present invention, the above-mentioned partial anti-peeping module further includes a second upper light guide plate and a second light source, the second upper light guide plate is arranged on the side of the anti-peeping film adjacent to the first upper light guide plate, the second upper light guide plate includes a second light emitting surface, a second bottom surface, a second light incident surface and a plurality of second microstructures, the second light emitting surface is opposite to the second bottom surface, the second light incident surface is connected to the second light emitting surface and the second bottom surface, the second microstructure is arranged on at least one of the second light emitting surface and the second bottom surface, and the second light source is arranged on one side of the second light incident surface, wherein the farther away from the second light source, the smaller the spacing between the second microstructures.

[0006] In one embodiment of the present invention, when the above-mentioned first microstructure is not arranged on the first bottom surface corresponding to the first block, the first microstructure is not arranged on the first bottom surface corresponding to the second block; or when the first microstructure is not arranged on the first light emitting surface corresponding to the first block, the first microstructure is not arranged on the first light emitting surface corresponding to the second block.

[0007] In one embodiment of the present invention, the average density of the first microstructures in the second area is zero.

[0008] In an embodiment of the present invention, the number of the first blocks is two, the number of the second block is one, and the second block is between the two first blocks.

[0009] In one embodiment of the present invention, when the above-mentioned first microstructure is a protruding structure, it has a first height, and when the second microstructure is a protruding structure, it has a second height, the first height is greater than 0 mm and less than or equal to 0.025 mm, and the second height is greater than 0 mm and less than or equal to 0.025 mm; or when the first microstructure is a recessed structure, it has a first depth, and when the second microstructure is a recessed structure, it has a second depth, the first depth is greater than 0 mm and less than or equal to 0.025 mm, and the second depth is greater than 0 mm and less than or equal to 0.025 mm.

[0010] In one embodiment of the present invention, the cross-section of the first microstructure parallel to the first bottom surface or the first light-emitting surface has a first length, and the cross-section of the second microstructure parallel to the second bottom surface or the second light-emitting surface has a second length, the first length is greater than 0 mm and less than or equal to 0.05 mm, and the second length is greater than 0 mm and less than or equal to 0.05 mm.

[0011] In one embodiment of the present invention, the above-mentioned partial anti-peeping module further includes a third upper light guide plate and a third light source, wherein the third upper light guide plate is arranged on a side of the first upper light guide plate away from the anti-peeping film, the third upper light guide plate includes a third light emitting surface, a third bottom surface, a third light incident surface and a plurality of third microstructures, the third light emitting surface is opposite to the third bottom surface, the third bottom surface is opposite to the first light emitting surface, the third light incident surface is connected to the third light emitting surface and the third bottom surface, the third microstructure is arranged on at least one of the third light emitting surface and the third bottom surface, wherein the third upper light guide plate has at least one adjacent third block and at least one fourth block, the average density of a portion of the third microstructures in the third block is greater than the average density of another portion of the third microstructures in the fourth block, the third light source is arranged on one side of the third light incident surface, and in the orthographic projection from the third upper light guide plate to the anti-peeping film, the third block does not completely overlap with the first block.

[0012] In one embodiment of the present invention, when the above-mentioned third microstructure is not arranged on the third bottom surface corresponding to the third block, the third microstructure is not arranged on the third bottom surface corresponding to the fourth block; or when the third microstructure is not arranged on the third light-emitting surface corresponding to the third block, the third microstructure is not arranged on the third light-emitting surface corresponding to the fourth block.

[0013] In one embodiment of the present invention, the average distribution density of the third microstructure in the fourth region is zero.

[0014] In an embodiment of the present invention, the number of the fourth areas is two, the number of the third area is one, and the third block is between the two fourth areas.

[0015] In one embodiment of the present invention, when the third microstructure is a protruding structure, it has a third height greater than 0 mm and less than or equal to 0.025 mm; or when the third microstructure is a concave structure, it has a third depth greater than 0 mm and less than or equal to 0.025 mm.

[0016] In one embodiment of the present invention, a cross section of the third microstructure parallel to the third bottom surface or the third light emitting surface has a third length, and the third length is greater than 0 mm and less than or equal to 0.05 mm.

[0017] The present invention provides a partial anti-peeping display device, comprising a backlight module, a partial anti-peeping module and a display panel. The backlight module comprises a lower light guide plate and an optical film group, and the lower light guide plate and the optical film group are arranged opposite to each other. A partial privacy protection module is arranged on a side of the optical film group away from the lower light guide plate, and the partial privacy protection module includes a privacy film, a first upper light guide plate and a first light source. The first upper light guide plate is arranged on one side of the privacy film, and the first upper light guide plate includes a first light incident surface, a first light emitting surface, a first bottom surface and multiple first microstructures. The first bottom surface faces the privacy film, the first light emitting surface is opposite to the first bottom surface, the first light incident surface connects the first light emitting surface and the first bottom surface, and the first microstructure is arranged on at least one of the first light emitting surface and the first bottom surface, wherein the first upper light guide plate has at least one adjacent first block and at least one second block, the average distribution density of a part of the first microstructures in the first block is greater than the average distribution density of another part of the first microstructures in the second block, and the first light source is arranged on one side of the first light incident surface; the display panel is arranged on a side of the partial privacy protection module away from the backlight module.

[0018] In one embodiment of the present invention, the above-mentioned partial anti-peeping module further includes a second upper light guide plate and a second light source, the second upper light guide plate is arranged on the side of the anti-peeping film adjacent to the first upper light guide plate, the second upper light guide plate includes a second light emitting surface, a second bottom surface, a second light incident surface and a plurality of second microstructures, the second light emitting surface is opposite to the second bottom surface, the second light incident surface is connected to the second light emitting surface and the second bottom surface, the second microstructure is arranged on at least one of the second light emitting surface and the second bottom surface, the second light source is arranged on one side of the second light incident surface, and the farther away from the second light source, the smaller the spacing between the second microstructures.

[0019] In one embodiment of the present invention, the above-mentioned partial anti-peeping module further includes a third upper light guide plate and a third light source, the third upper light guide plate is arranged on a side of the first upper light guide plate away from the anti-peeping film, the third upper light guide plate includes a third light emitting surface, a third bottom surface, a third light incident surface and a plurality of third microstructures, the third light emitting surface is opposite to the third bottom surface, the third bottom surface is opposite to the first light emitting surface, the third light incident surface is connected to the third light emitting surface and the third bottom surface, the third microstructure is arranged on at least one of the third light emitting surface and the third bottom surface, wherein the third upper light guide plate has at least one adjacent third block and at least one fourth block, the average distribution density of a part of the third microstructures in the third block is greater than the average distribution density of another part of the third microstructures in the fourth block, the third light source is arranged on one side of the third light incident surface, and in the orthographic projection from the third upper light guide plate to the anti-peeping film, the third block does not completely overlap with the first block.

[0020] In an embodiment of the present invention, when the aforementioned partial anti-peeping display device further includes at least one switch key, the switch key is electrically connected to at least one of the first light source and the third light source.

[0021] In an embodiment of the present invention, when the optical film set includes at least one of at least one diffusion sheet, at least one brightness enhancement film, and at least one prism sheet, and the backlight module is a direct-type backlight module or an edge-type backlight module.

[0022] The present invention utilizes the difference in microstructure distribution density to cause different degrees of refraction and reflection of the light from the light source entering the light guide plate, thereby achieving the effect of partial display of screen content and full display of screen content. And by switching to different light sources, the partial anti-peeping display device can achieve the effects of full-screen anti-peeping, partial anti-peeping and full-screen display.

[0023] In order to make the above and other purposes, features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. 1 is a cross-sectional schematic diagram of a portion of a privacy protection module according to a first embodiment of the present invention.

[0025] Figure 2FIG. 1 is a cross-sectional schematic diagram of a portion of a privacy protection module according to a second embodiment of the present invention.

[0026] Figure 3 FIG. 1 is a cross-sectional schematic diagram of a portion of a privacy protection module according to a third embodiment of the present invention.

[0027] Figure 4 FIG. 1 is a cross-sectional schematic diagram of a portion of a privacy protection module according to a fourth embodiment of the present invention.

[0028] Figure 5 FIG. 1 is a cross-sectional schematic diagram of a portion of a privacy protection module according to a fifth embodiment of the present invention.

[0029] Figure 6 FIG. 1 is a cross-sectional schematic diagram of a portion of a privacy protection module according to a sixth embodiment of the present invention.

[0030] Figure 7 FIG. 1 is a cross-sectional schematic diagram of a portion of a privacy protection module according to a seventh embodiment of the present invention.

[0031] Figure 8 It is a three-dimensional schematic diagram of a portion of an anti-peeping module according to an eighth embodiment of the present invention.

[0032] Fig. 9 It is a three-dimensional schematic diagram of a portion of the anti-peeping module according to a ninth embodiment of the present invention.

[0033] Fig. 10A and Fig. 10B 1 and 2 are bottom views of a first upper light guide plate and a third upper light guide plate of a partial privacy protection module according to a tenth embodiment of the present invention.

[0034] Fig.11A and Fig. 11B They are bottom views of the first upper light guide plate and the third upper light guide plate of a portion of the privacy protection module according to an eleventh embodiment of the present invention.

[0035] Fig. 12A and Fig. 12B 1 and 2 are bottom views of a first upper light guide plate and a third upper light guide plate of a partial privacy protection module according to a twelfth embodiment of the present invention.

[0036] Fig.13 FIG. 1 is a cross-sectional schematic diagram of a portion of an anti-peeping display device according to a first embodiment of the present invention.

[0037] Fig.14 FIG. 1 is a cross-sectional schematic diagram of a portion of an anti-peeping display device according to a second embodiment of the present invention.

[0038] Fig.15 FIG. 1 is a cross-sectional schematic diagram of a portion of an anti-peeping display device according to a third embodiment of the present invention.

[0039] Wherein, the reference numerals are:

[0040] 100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H: some privacy protection modules

[0041] 10, 10A, 10B, 10C, 10D, 110, 110A, 110B: first upper light guide plate

[0042] 12: First light incident surface

[0043] 14, 114, 114A, 114B: first bottom surface

[0044] 16, 116, 116A, 116B: first light emitting surface

[0045] 18: First microstructure

[0046] 20, 20A, 20B, 20C: second upper light guide plate

[0047] 22: Second light incident surface

[0048] 24: Second bottom surface

[0049] 26: Second light-emitting surface

[0050] 28: Second microstructure

[0051] 30, 30A, 30B, 30C, 30D, 130, 130A, 130B: third upper light guide plate

[0052] 32: The third light-entering surface

[0053] 34, 134, 134A, 134B: third bottom surface

[0054] 36, 136, 136A, 136B: third light emitting surface

[0055] 38: The third microstructure

[0056] 40: Privacy film

[0057] 50:First Light Source

[0058] 52: Second light source

[0059] 54: The third light source

[0060] 60: Switch key

[0061] 200, 200A: Backlight module

[0062] 220: Lower light guide plate

[0063] 240: Optical film set

[0064] 260, 260A: Backlight

[0065] 261, 500, 520, 540: light

[0066] 262: Collimated light

[0067] 300, 300A, 300B: Some anti-peep display devices

[0068] 310: Display screen

[0069] A1, A1': first block

[0070] A2: The second block

[0071] A3, A3': The third block

[0072] A4: The fourth block

[0073] H1: First Height

[0074] H2: Second Height

[0075] H3: The third height

[0076] D1: First Depth

[0077] D2: Second Depth

[0078] D3: Third Depth

[0079] L1: First length

[0080] L2: Second length

[0081] L3: The third length

[0082] PA1, PA2: Partial display area

[0083] V1, V2, V3: Viewing angle DETAILED DESCRIPTION

[0084] Figure 1 FIG. 1 is a cross-sectional schematic diagram of a portion of a privacy protection module according to a first embodiment of the present invention. Figure 1As shown, a partial privacy protection module 100 includes a privacy protection film 40, a first upper light guide plate 10 and a first light source 50. The first upper light guide plate 10 is disposed on one side of the privacy protection film 40. The first upper light guide plate 10 includes a first light incident surface 12, a first bottom surface 14, a first light emitting surface 16 and a plurality of first microstructures 18. The first bottom surface 14 faces the privacy protection film 40; the first bottom surface 14 is opposite to the first light emitting surface 16; the first light incident surface 12 connects the first bottom surface 14 and the first light emitting surface 16; the first microstructure 18 is, for example, a concave structure, but not limited thereto, and is disposed on the first bottom surface 14. The first upper light guide plate 10 has a first block A1 and a second block A2 adjacent to each other, and the average distribution density of a portion of the first microstructures 18 in the first block A1 is greater than the average distribution density of another portion of the first microstructures 18 in the second block A2. The first light source 50 is disposed on one side of the first light incident surface 12.

[0085] In one embodiment, it can be understood that the average distribution density refers to the number of microstructures in a unit area of ​​a specific surface. For example, the number of first microstructures 18 on the first bottom surface 14 corresponding to the first block A1 is the average distribution density of the first microstructures 18 on the first bottom surface 14 corresponding to the first block A1. Figure 1 As shown, the average distribution density of a portion of the first microstructures 18 on the first bottom surface 14 corresponding to the first block A1 is greater than the average distribution density of another portion of the first microstructures 18 on the first bottom surface 14 corresponding to the second block A2. In one embodiment, the average distribution density of the first microstructures 18 on the first bottom surface 14 corresponding to the second block A2 may be zero, that is, the first bottom surface 14 corresponding to the second block A2 is not provided with the second microstructure 28 (as described later). Fig.11A The second block A2 is shown, but is not limited thereto.

[0086] Figure 2 A cross-sectional schematic diagram of a portion of a privacy protection module according to a second embodiment of the present invention. Figure 2 As shown, the difference between the partial privacy protection module 100A and the partial privacy protection film 100 is that a second upper light guide plate 20 and a second light source 52 are added. The second upper light guide plate 20 is disposed on a side of the privacy protection film 40 adjacent to the first upper light guide plate 10. For example, the second upper light guide plate 20 can be disposed between the privacy protection film 40 and the first upper light guide plate 10, or the first upper light guide plate 10 can be disposed between the second upper light guide plate 20 and the privacy protection film. Figure 2The second embodiment of the partial privacy module 100A shown takes the second upper light guide plate 20 between the privacy film 40 and the first upper light guide plate 10 as an example. The second upper light guide plate 20 includes a second light incident surface 22, a second bottom surface 24, a second light emitting surface 26 and a plurality of second microstructures 28. The second bottom surface 24 is opposite to the second light emitting surface 26; the second light emitting surface 26 is opposite to the first bottom surface 14; the second light incident surface 22 connects the second bottom surface 24 and the second light emitting surface 26; the second microstructure 28 is, for example, a concave structure, but not limited thereto, and is disposed on the second bottom surface 24. The second light source 52 is disposed on one side of the second light incident surface 22. In one embodiment, on the second bottom surface 24 of the second upper light guide plate 20, the further away from the second light source 52, the smaller the spacing between the second microstructures 28. It is also understandable that in one embodiment, on the first bottom surface 14 corresponding to the first block A1, the further away from the first light source 50, the smaller the spacing between the first microstructures 18, and the denser the arrangement.

[0087] Figure 3 FIG. 1 is a cross-sectional schematic diagram of a portion of a privacy protection module according to a third embodiment of the present invention. Figure 3 As shown, the partial privacy protection module 100B includes a privacy protection sheet 40, a first upper light guide plate 10A, a second upper light guide plate 20A, a first light source 50 and a second light source 52, wherein the first upper light guide plate 10A has a different structure from the first upper light guide plate 10, and the second upper light guide plate 20A has a different structure from the second upper light guide plate 20. In the first upper light guide plate 10A, the first microstructure 18 is, for example, a protruding structure, but not limited thereto, disposed on the first light exit surface 16, wherein the average density of a portion of the first microstructure 18 on the first light exit surface 16 corresponding to the first block A1 is greater than the average density of another portion of the first microstructure 18 on the first light exit surface 16 corresponding to the second block A2. In the second upper light guide plate 20A, the second microstructure 28 is, for example, a protruding structure, but not limited thereto, disposed on the second light exit surface 26, wherein on the second light exit surface 26, the further away from the second light source 52, the smaller the spacing between the second microstructures 28. It is also understandable that, in one embodiment, the farther away from the first light source 50 the first light emitting surface 16 corresponding to the first block A1 in the first upper light guide plate 10 is, the smaller the spacing between the first microstructures 18 is, and the denser the arrangement is.

[0088] according to Figure 2 and Figure 3 As shown, it is understandable that no matter the first microstructures 18 are disposed on the first bottom surface 14 or the first light emitting surface 16 , the average density of a portion of the first microstructures 18 in the first area A1 is greater than the average density of another portion of the first microstructures 18 in the second area A2 .

[0089] Figure 4 FIG. 1 is a cross-sectional schematic diagram of a portion of a privacy protection module according to a fourth embodiment of the present invention. Figure 4As shown, the partial privacy protection module 100C includes a privacy film 40, a first upper light guide plate 10, a second upper light guide plate 20, a third upper light guide plate 30, a first light source 50, a second light source 52, and a third light source 54. The partial privacy protection module 100C is based on the partial privacy protection module 100A and adds a third upper light guide plate 30 and a third light source 54. The third upper light guide plate 30 is disposed on a side of the first upper light guide plate 10 away from the privacy film 40. Figure 4 The partial privacy protection module 100C shown takes the first upper light guide plate 10 between the second upper light guide plate 20 and the third upper light guide plate 30 as an example, and the third upper light guide plate 30 includes a third light incident surface 32, a third bottom surface 34, a third light emitting surface 36 and a plurality of third microstructures 38, wherein the third bottom surface 34 is opposite to the third light emitting surface 36, the third bottom surface 34 is opposite to the first light emitting surface 16, and the third light incident surface 32 connects the third light emitting surface 36 and the third bottom surface 34; the third microstructure 38 is a concave structure, but is not limited thereto, and is disposed on the third bottom surface 34. The third upper light guide plate 30 has a third block A3 and a fourth block A4 adjacent to each other, and the average distribution density of a portion of the third microstructures 38 on the third bottom surface 34 corresponding to the third block A3 is greater than the average distribution density of another portion of the third microstructures 38 on the third bottom surface 34 corresponding to the fourth block A4. The third light source 54 is disposed on one side of the third light incident surface 32, and in the orthographic projection from the third upper light guide plate 30 to the privacy film 40, the third block A3 does not completely overlap with the first block A1. In one embodiment, in the third bottom surface 34 corresponding to the third block A3 in the third upper light guide plate 30, the further away from the third light source 54, the smaller the spacing between the third microstructures 38 and the denser the arrangement. Similar to the first upper light guide plate 10, in one embodiment, the average distribution density of the third microstructures 38 on the third bottom surface 34 corresponding to the fourth block A4 may be zero, that is, the third bottom surface 34 corresponding to the fourth block A4 is not provided with the third microstructure 38 (as described later). Fig. 11B The fourth block A4 is shown, but is not limited thereto.

[0090] Figure 5 FIG. 1 is a cross-sectional schematic diagram of a portion of a privacy protection module according to a fifth embodiment of the present invention. Figure 5As shown, the partial privacy protection module 100D includes a privacy protection sheet 40, a first upper light guide plate 10B, a second upper light guide plate 20B, a third upper light guide plate 30A, a first light source 50, a second light source 52 and a third light source 54, wherein the difference between the partial privacy protection module 100D and the partial privacy protection module 100C is that the structures of the first upper light guide plate 10B, the second upper light guide plate 20B and the third upper light guide plate 30A are different from the structures of the first upper light guide plate 10, the second upper light guide plate 20 and the third upper light guide plate 30 in the partial privacy protection module 100C. In the first upper light guide plate 10B, the first microstructure 18 is a protruding structure, which is disposed on the first bottom surface 14, and the average distribution density of a portion of the first microstructure 18 on the first bottom surface 14 corresponding to the first block A1 is greater than the average distribution density of another portion of the first microstructure 18 on the first bottom surface 14 corresponding to the second block A2. In the second upper light guide plate 20B, the second microstructure 28 is a protruding structure, disposed on the second bottom surface 24, but is not limited thereto. In the third upper light guide plate 30A, the third microstructure 38 is a protruding structure, disposed on the third light exiting surface 36, wherein the average distribution density of a portion of the third microstructures 38 on the third light exiting surface 36 corresponding to the third block A3 is greater than the average distribution density of another portion of the third microstructures 38 on the third light exiting surface 36 corresponding to the fourth block A4. In one embodiment, on the second bottom surface 24 of the second upper light guide plate 20B, the further away from the second light source 52, the smaller the spacing between the second microstructures 28, and the denser the arrangement.

[0091] according to Figure 4 and Figure 5 As shown, it is understandable that no matter the third microstructures 38 are disposed on the third bottom surface 34 or the third light emitting surface 36 , the average density of a portion of the third microstructures 38 in the third area A3 is greater than the average density of another portion of the third microstructures 38 in the fourth area A4 .

[0092] Figure 6 FIG. 1 is a cross-sectional schematic diagram of a portion of a privacy protection module according to a sixth embodiment of the present invention. Figure 6 As shown, the partial privacy protection module 100E includes a privacy protection sheet 40, a first upper light guide plate 10B, a second upper light guide plate 20, a third upper light guide plate 30B, a first light source 50, a second light source 52, and a third light source 54. The difference between the partial privacy protection module 100E and the partial privacy protection module 100C is that the first microstructure 18 of the first upper light guide plate 10B is a protruding structure, and the third microstructure 38 of the third upper light guide plate 30B is a protruding structure. As for the size or value limitation of the average distribution density of the first microstructure 18, the second microstructure 28, and the third microstructure 38, it has been disclosed in the partial privacy protection modules 100A and 100C of the second and fourth embodiments, and will not be repeated here.

[0093] Figure 7 FIG. 1 is a cross-sectional schematic diagram of a portion of a privacy protection module according to a seventh embodiment of the present invention. Figure 7As shown, the partial privacy protection module 100F includes a privacy protection sheet 40, a first upper light guide plate 10C, a second upper light guide plate 20C, a third upper light guide plate 30C, a first light source 50, a second light source 52, and a third light source 54. The difference between the partial privacy protection module 100F and the partial privacy protection module 100C is that the first microstructure 18 of the first upper light guide plate 10C is a recessed structure and is formed on the first light exiting surface 16, the second microstructure 28 of the second upper light guide plate 20C is a recessed structure and is formed on the second light exiting surface 26, and the third microstructure 38 of the third upper light guide plate 30C is a recessed structure and is formed on the third light exiting surface 36. As for the size or numerical limit of the average distribution density of the first microstructure 18, the second microstructure 28, and the third microstructure 38, it has been disclosed in the partial privacy protection modules 100A and 100C of the second and fourth embodiments, and will not be repeated here.

[0094] Figure 8 FIG. 1 is a cross-sectional schematic diagram of a portion of the anti-peeping module of an eighth embodiment of the present invention. Figure 8 As shown, the partial privacy protection module 100G includes a privacy film 40, a first upper light guide plate 10D, a second upper light guide plate 20, a third upper light guide plate 30D, a first light source 50, a second light source 52, and a third light source 54. The difference between the partial privacy protection module 100G and the partial privacy protection module 100C of the fourth embodiment is that the first microstructure 18 (recessed structure) of the first upper light guide plate 10D is formed on the first light emitting surface 16 in addition to being formed on the first bottom surface 14; and the third microstructure 38 (recessed structure) of the third upper light guide plate 30D is formed on the third light emitting surface 36 in addition to being formed on the third bottom surface 34. In one embodiment, the first microstructure 18, the second microstructure 28, and the third microstructure 38 of the partial privacy protection module 100G may be protruding structures.

[0095] Fig. 9 FIG. 1 is a three-dimensional schematic diagram of a portion of a privacy protection module according to a ninth embodiment of the present invention. Fig. 9 As shown, the partial privacy protection module 100H includes a privacy protection sheet 40, a first upper light guide plate 10, a third upper light guide plate 30, a first light source 50 and a third light source 54, wherein the reflective sheet 40, the first upper light guide plate 10, the third upper light guide plate 30, the first light source 50 and the third light source 54 have been described in the previous section and will not be repeated. Fig. 9 As shown, in the orthographic projection from the third upper light guide plate 30 to the privacy film 40 , the range of the first block A1 of the first upper light guide plate 10 and the range of the third block A3 of the third upper light guide plate 30 do not overlap and are not adjacent.

[0096] In all the aforementioned embodiments, the first microstructure 18, the second microstructure 28 or the third microstructure 38 may be, for example, cone-shaped, hemispherical or dot-shaped, but is not limited thereto. Fig. 9As shown, the first microstructure 18 and the third microstructure 38 of the partial privacy protection module 100H are hemispherical as an example, but are not limited thereto. Figures 4 to 9 , in the orthographic projection from the third upper light guide plate 30 to the privacy film 40, the third block A3 (the third microstructure 38 is disposed in the dense area of ​​the third bottom surface 34 or the third light exit surface 36) and the first block A1 (the second microstructure 28 is disposed in the dense area of ​​the second bottom surface 24 or the second light exit surface 36) do not completely overlap. In one embodiment, it can be understood that incomplete overlap refers to all other situations excluding complete overlap, and complete overlap means that the orthographic projection range is completely the same. The situation of incomplete overlap includes but is not limited to partial overlap of the orthographic projection range (such as the subsequent Fig.11A The first block A1' and Fig. 11B The third block A3), non-overlapping and adjacent (such as Figures 4 to 8 as shown) or non-overlapping and non-adjacent (as shown Fig. 9 as shown) and other situations.

[0097] Fig. 10A and Fig. 10B They are bottom views of the first upper light guide plate and the third upper light guide plate of a partial anti-peeping module of the tenth embodiment of the present invention. Fig. 10A and Fig. 10B As shown, the first upper light guide plate 110 has two first blocks A1, A1' and a second block A2, the second block A2 is between the two first blocks A1, A1', and the average distribution density of the first microstructure 18 in the two first blocks A1, A1' is equal or unequal, and the average distribution density of a portion of the first microstructure 18 in the first blocks A1, A1' is greater than the average distribution density of another portion of the first microstructure 18 in the second block A2; the third upper light guide plate 130 has a third block A3 and two fourth blocks A4, A4', the third block A3 is between the two fourth blocks A4, A4', and the average distribution density of the third microstructure 38 in the two fourth blocks A4, A4' is equal or unequal and less than the average distribution density of the third microstructure 38 in the third block A3. Please also refer to Figures 9 to 10B , the first upper light guide plate 10 and the third upper light guide plate 30 are replaced with the first upper light guide plate 110 and the third upper light guide plate 130 respectively. In the orthographic projection from the third upper light guide plate 130 to the privacy film 40, the first block A1, A1' and the second block A2 can overlap with the fourth block A4, A4' and the third block A3 respectively (that is, the first block A1, A1' overlaps with the third block A3, and the second block A2 overlaps with the fourth block A4, A4'), which is a non-overlapping and adjacent situation in which the orthographic projection range is incompletely overlapped, but is not limited to this.

[0098] Fig.11A and Fig. 11BFIG. 1 is a bottom view of the first upper light guide plate and the third upper light guide plate according to the eleventh embodiment of the present invention. Fig.11A and Fig. 11B As shown, the first upper light guide plate 110A has two first blocks A1, A1' and a second block A2, the second block A2 is between the two first blocks A1, A1', the first microstructure 18 is disposed in the two first blocks A1, A1', and the average distribution density of the first microstructure 18 in the two first blocks A1, A1' is equal or unequal, and the first microstructure 18 is not disposed in the second block A2; the third upper light guide plate 130A has a third block A3 and two fourth blocks A4, A4', the third block A3 is between the two fourth blocks A4, A4', and the third microstructure 38 is disposed in the third block A3 and is not disposed in the fourth blocks A4, A4'. Please also refer to Fig. 9 , Fig.11A and Fig. 11B The first upper light guide plate 10 and the third upper light guide plate 30 are replaced with the first upper light guide plate 110A and the third upper light guide plate 130A respectively. In the orthographic projection from the third upper light guide plate 130A to the privacy film 40, a portion of the third block A3 overlaps with the second block A2, and another portion of the third block A3 overlaps with a portion of the first block A1', which is a case of partial overlap in an incomplete overlap of the orthographic projection range, but is not limited to this.

[0099] Fig. 12A and Fig. 12B FIG. 1 is a bottom view schematically showing the first upper light guide plate and the third upper light guide plate of the twelfth embodiment of the present invention. Fig. 12A and Fig. 12B As shown, the first upper light guide plate 110B has a first block A1 and a second block A2, wherein the first block A1 is disposed at a corner of the first upper light guide plate 110B, but is not limited thereto, and the average distribution density of a portion of the first microstructure 18 in the first block A1 is greater than the average distribution density of another portion of the first microstructure 18 in the second block A2; the third upper light guide plate 130B has a third block A3 and a fourth block A4, wherein the third block A3 is disposed at a corner of the third upper light guide plate 130B, but is not limited thereto, and the average distribution density of a portion of the third microstructure 38 in the third block A3 is greater than the average distribution density of another portion of the third microstructure 38 in the fourth block A4. Taking the first upper light guide plate 110B and the third upper light guide plate 130B as examples, the range of the first block A1 is, for example, a rectangle, and at least two adjacent sides of the first block A1 are adjacent to the second block A2; the range of the third block A3 is, for example, a rectangle, and at least two adjacent sides of the third block A3 are adjacent to the fourth block A4, but the present invention is not limited thereto. Fig. 9 , Fig. 12A and Fig. 12BThe first upper light guide plate 10 and the third upper light guide plate 30 are replaced with the first upper light guide plate 110B and the third upper light guide plate 130B respectively. In the orthographic projection from the third upper light guide plate 130B to the privacy film 40, the first block A1 partially overlaps with the third block A3 and the fourth block A4.

[0100] according to Figures 4 to 12B As shown, it can be understood that the first upper light guide plate 10 / 10A / 10B / 10C / 10D / 110 / 110A / 110B and the third upper light guide plate 30 / 30A / 30B / 30C / 30D / 130 / 130A / 130B can be used in any combination, but in the orthographic projection, the orthographic projection range of the first block A1 does not completely overlap with the orthographic projection range of the third block A3.

[0101] according to Figures 1 to 8 As shown, it can be understood that the first microstructure 18 can be disposed on at least one of the first bottom surface 14 and the first light-emitting surface 16, the second microstructure 28 can be disposed on at least one of the second bottom surface 24 and the second light-emitting surface 26, and the third microstructure 38 can be disposed on at least one of the third bottom surface 34 and the third light-emitting surface 36, wherein, when the first microstructure 18 is not disposed on the first bottom surface 14 corresponding to the first block A1, the first microstructure 18 is not disposed on the first bottom surface 14 corresponding to the second block A2; or when the first microstructure is not disposed on the first light-emitting surface 16 of the first block A1, the first microstructure 18 is not disposed on the first light-emitting surface 16 corresponding to the second block A2. Similarly, when the third microstructure 38 is not disposed on the first bottom surface 34 corresponding to the third block A3, the third microstructure 38 is not disposed on the third bottom surface 34 corresponding to the fourth block A4; or when the third microstructure 38 is not disposed on the third light-emitting surface 36 of the third block A3, the third microstructure 38 is not disposed on the third light-emitting surface 36 corresponding to the fourth block A4.

[0102] The above-mentioned microstructures include concave structures or convex structures. It can be understood that the so-called concave structure is a structure extending from the surface to the inside of the object, and the depth of the concave structure is defined as the farthest distance from the surface to the concave structure in the normal direction of the surface. Please also refer to Figure 1 , Figure 2 , Figure 4 and Figure 7As shown, when the first microstructure 18, the second microstructure 28 and the third microstructure 38 are recessed structures, the first microstructure 18 has a first depth D1 relative to the first bottom surface 14 or the first light emitting surface 16, and the first depth D1 is greater than 0 mm and less than or equal to 0.025 mm; the second microstructure 28 has a second depth D2 relative to the second bottom surface 24 or the second light emitting surface 26, and the second depth D2 is greater than 0 mm and less than or equal to 0.025 mm; the third microstructure 38 has a third depth D3 relative to the third bottom surface 34 or the third light emitting surface 36, and the third depth is greater than 0 mm and less than or equal to 0.025 mm, wherein the first depth D1, the second depth D2 and the third depth D3 may be equal or unequal.

[0103] In contrast, a protruding structure is a structure protruding from a surface, and the height of the protruding structure is defined as the maximum distance from the surface to the protruding structure in the normal direction of the surface. Figure 3 , Figure 5 and Figure 6 As shown, when the first structure 18, the second structure 28 and the third structure 38 are protruding structures, the first structure 18 has a first height H1 relative to the first bottom surface 14 or the first light-emitting surface 16, and the first height H1 is greater than 0 mm and less than or equal to 0.025 mm; the second structure 28 has a second height H2 relative to the second bottom surface 24 or the second light-emitting surface 26, and the second height H2 is greater than 0 mm and less than or equal to 0.025 mm; the third structure 38 has a third height H3 relative to the third bottom surface 34 or the third light-emitting surface 36, and the third height H3 is greater than 0 mm and less than or equal to 0.025 mm, wherein the first height H1, the second height H2 and the third height H3 may be equal or unequal.

[0104] Please also see Figures 1 to 7 and FIG. 10A to FIG. 10B As shown, the cross section of the first microstructure 18 parallel to the first bottom surface 14 or the first light emitting surface 16 is, for example, circular, and has a first length L1, which is, for example, the diameter of the circle, and is greater than 0 mm and less than or equal to 0.05 mm. The cross section of the second microstructure 28 parallel to the second bottom surface 24 or the second light emitting surface 26 is, for example, circular, and has a second length L2, which is, for example, the diameter of the circle, and is greater than 0 mm and less than or equal to 0.05 mm. The cross section of the third microstructure 38 parallel to the third bottom surface 34 or the third light emitting surface 36 is, for example, circular, and has a third length L3, which is, for example, the diameter of the circle, and is greater than 0 mm and less than or equal to 0.05 mm. In an embodiment not shown, when the cross section of the first microstructure 18 parallel to the first bottom surface 14 or the first light emitting surface 16 is a polygon or a composite figure, the first length L1 is the longest distance within the range of the polygon or the composite figure, and the second length L2 and the third length L3 are also defined in the same way.

[0105] The light of some privacy protection modules 100 / 100A / 100B / 100C / 100D / 100E / 100F / 100G / 100H comes from the first light source 50, the second light source 52 or the third light source 54. Therefore, the light transmission effect of some privacy protection modules 100 / 100A / 100B / 100C / 100D / 100E / 100F / 100G / 100H depends on the turned-on light source and the upper light guide plate corresponding to the light source. Please also refer to Figures 1 to 9 As shown, in the first upper light guide plate 10 / 10A / 10B / 10C / 10D, the first microstructure 18 is disposed on at least one of the first bottom surface 14 and the first light emitting surface 16. When only the first light source 50 is turned on, the light 500 provided by the first light source 50 is reflected by the partial area of ​​the first bottom surface 14 having the first microstructure 18, and then emitted from the first light emitting surface 16, or the light 500 is refracted from the partial area of ​​the first light emitting surface 16 having the first microstructure 18. Since the light 500 reflected or refracted by the first block A1 is much more than the light reflected by the second block A2, the brightness of the light 500 emitted from the first light emitting surface 16 corresponding to the first block A1 is much greater than the brightness of the light emitted from the first light emitting surface 16 corresponding to the second block A2, and the viewing angle provided by the light 500 is small and has a bias. In one embodiment, when the average distribution density of the first microstructures 18 in the second block A2 is zero, the first light emitting surface 16 corresponding to the second block A2 will not emit light, that is, the light provided by the second light source 50 is only emitted from the first light emitting surface 16 corresponding to the first block A1. In this way, the first light emitting surface 16 corresponding to the second block A2 in the first upper light guide plate 10 / 10A / 10B / 10C / 10D cannot emit light 500, so as to achieve a partial light-transmitting (partially light-impermeable) effect, and the light 500 in the partially light-transmitting area has a bias.

[0106] Please also see Figures 2 to 8 In the second upper light guide plate 20 / 20A / 20B / 20C, the second microstructure 28 is disposed on one of the second bottom surface 24 or the second light emitting surface 26. When only the second light source 52 is turned on, the light 520 provided by the second light source 52 is reflected by the second bottom surface 24 and emitted from the second light emitting surface 26 in the entire plane, providing full-plane light transmission with a maximum viewing angle. In one embodiment, in order to make the light emitted from the second light emitting surface 26 uniform, on the second bottom surface 24 or the second light emitting surface 14, the further away from the second light source 52, the smaller the distance between the second microstructures 28 and the denser the arrangement.

[0107] Combined with the above description, Figure 2For example, when only the first light source 50 and the second light source 52 are turned on at the same time, the light 520 is emitted from the second light emitting surface 26 in the whole plane and penetrates the first light emitting surface 16 of the first upper light guide plate 10, providing full-plane light transmission with a maximum viewing angle, wherein, since the light 500 is emitted from the first light emitting surface 16 corresponding to the first block A1, under the superposition effect of the light 500 and the light 520, the brightness of the first light emitting surface 16 corresponding to the first block A1 is greater than the brightness of the first light emitting surface 16 corresponding to the second block A2. Similarly, the partial privacy protection modules 100B, 100C, 100D, 100E, 100F, and 100G have the same effect.

[0108] Continuing from the above instructions, please also refer to Figures 4 to 9 , the third upper light guide plate 30 / 30A / 30B / 30C / 30D has the same optical principle as the first upper light guide plate 10 / 10A / 10B / 10C / 10D, and presents similar effects. The third microstructure 38 is disposed on at least one of the third bottom surface 34 or the third light emitting surface 36. When only the third light source 54 is turned on, the light 540 provided by the third light source 54 is reflected by the partial area of ​​the third bottom surface 34 having the third microstructure 38, and is emitted through the third light emitting surface 36, or the light 540 is refracted through the partial area of ​​the third light emitting surface 36 having the third microstructure 38. Since the light 540 reflected or refracted by the third block A3 is much more than the light 540 reflected by the fourth block A4, the brightness of the light 540 emitted by the third light emitting surface 36 corresponding to the third block A3 is much greater than the brightness of the light 540 emitted by the third light emitting surface 36 corresponding to the fourth block A4, and the viewing angle provided by the light 540 is small and has a bias. In one embodiment, when the average distribution density of the third microstructures 38 in the fourth block A4 is zero, the third light-emitting surface 36 corresponding to the fourth block A4 will not emit light 540, that is, the light 540 provided by the third light source 54 is only emitted from a portion of the third light-emitting surface 36 corresponding to the third block A3. In this way, light cannot be emitted through a portion of the third bottom surface 34, so as to achieve a partial light-transmitting (partially light-impermeable) effect.

[0109] Combined with the above description, Figure 5For example, when only the second light source 52 and the third light source 54 are turned on, the optical principle and light transmission effect are similar to when only the first light source 50 and the second light source 52 are turned on. The light 520 is emitted from the second light emitting surface 26 in the whole plane and penetrates the third light emitting surface 36 of the third upper light guide plate 30A, providing full plane light transmission with the maximum viewing angle, wherein, since the light 540 is emitted from the third light emitting surface 36 corresponding to the third block A3, under the superposition effect of the light 540 and the light 520, the brightness of the third light emitting surface 36 corresponding to the third block A3 is greater than the brightness of the third light emitting surface 16 corresponding to the fourth block A4. Similarly, the partial privacy protection modules 100C, 100E, 100F, and 100G have the same effect.

[0110] Similarly, taking the partial privacy protection module 100D as an example, when only the first light source 50 and the third light source 54 are turned on at the same time and the second light source 52 is turned off, the light 500 is mainly emitted from the first light exit surface 16 corresponding to the first block A1 and penetrates the third upper light guide plate 30A, and the light 540 is emitted from the third light exit surface 36 corresponding to the third block A3. Since the first block A1 and the third block A3 do not completely overlap in the orthographic projection from the third upper light guide plate 30A to the privacy protection film 40, when the light 500 and the light 540 are emitted from the third light exit surface 36, the light transmission area depends on the coverage of the first block A1 and the third block A3 in the orthographic projection, and may present the effect of full plane light transmission or partial area light transmission. However, the light 500 emitted from the first light emitting surface 16 and the third light emitting surface 36 has a bias, and the light 540 emitted from the third light emitting surface 36 has a bias, so although it may present full plane light transmission, it is different from the effect when only the second light source 52 is turned on. Similarly, some of the privacy protection modules 100C, 100E, 100F, 100G, 100H have the same effect.

[0111] In combination with the above description, taking the partial anti-peep module 100D as an example, when the first light source 50, the second light source 52 and the third light source 54 are turned on at the same time, all light rays 500 / 520 / 540 are emitted from the third light-emitting surface 36, and are fully planar and transparent. The overall light has no bias, but the overall brightness is improved, wherein the brightness of the third light-emitting surface 36 corresponding to the first block A1 and the third block A3 in the orthographic projection is the highest, or the brightness of the third light-emitting surface 36 corresponding to the overlapping area of ​​the first block A1 and the third block A3 in the orthographic projection is the highest.

[0112] like Figure 8 As shown, the partial privacy protection module 100G has the features of the partial privacy protection module 100C of the fourth embodiment and the partial privacy protection module 100F of the seventh embodiment. Therefore, the optical principle and light transmission effect of the partial privacy protection module 100G are the same as described in the previous paragraph and will not be repeated here.

[0113] According to the above description, it can be understood that some of the privacy protection modules 100 / 100A / 100B / 100C / 100D / 100E / 100F / 100G / 100H are not limited thereto, and the privacy protection film 40 and the first upper light guide plate 10 / 10A / 10B / 10C / 10D can be arbitrarily combined with or not combined with at least one of the second upper light guide plate 20 / 20A / 20B / 20C and the third upper light guide plate 30 / 30A / 30B / 30C / 30D. When the first upper light guide plate 10 / 10A / 10B / 10C / 10D is combined with the second upper light guide plate 20 / 20A / 20B / 20C or / and the third upper light guide plate 30 / 30A / 30B / 30C / 30D, their relative positions can be replaced.

[0114] Fig.13 FIG. 1 is a cross-sectional schematic diagram of a portion of an anti-peeping display device according to a first embodiment of the present invention. Fig.13 As shown, the partial anti-peeping display device 300 includes a backlight module 200, a partial anti-peeping module 100A and a display screen 310, but is not limited thereto, wherein the partial anti-peeping module 100A has been described in the previous section and will not be repeated. In one embodiment, the backlight module 200 is a direct-type backlight module, including a lower light guide plate 220, an optical film group 240 and a backlight source 260. The lower light guide plate 220 and the optical film group 240 are arranged relative to each other, and the lower light guide plate 220 is between the backlight source 260 and the optical film group 240. Among them, in the orthographic projection from the display screen 310 to the backlight module 200, the first block A1 of the first upper light guide plate 10 overlaps with the first partial display area PA1 of the display screen 310. The backlight source 260 provides light 261 that penetrates the lower light guide plate 220 and the optical film assembly 240 , and then is transmitted to the privacy film 40 of a portion of the privacy protection module 100A to form collimated light 262 , which is finally provided to the display screen 310 .

[0115] Continuing the above description, when only the backlight source 260 provides light, the partial anti-peeping display device 300 provides a positive viewing angle with a smaller viewing angle, that is, a full-screen anti-peeping effect. When the backlight source 260 is turned on with the first light source 50, the second light source 52 or the third light source 54, the user can be provided with a full-screen sharing or partial sharing (partial anti-peeping) effect. Fig.13As shown, when only the backlight source 260 and the first light source 50 are turned on, the backlight source 260 forms collimated light 262 through the privacy film 40 and transmits it to the display screen, which can provide the user with a smaller front viewing angle. In addition, the first light source 50 is reflected by the first block A1, providing the first partial display area PA1 with a smaller viewing angle and a biased side viewing angle, forming a viewing angle V2, and the viewing angle V2 is biased away from the second light source; that is, when the backlight source 260 and the first light source 50 are turned on at the same time, the user with the front viewing angle can share the screen content of the first partial display area PA1 with the bystander on one side, while the bystander on the other side still cannot see the screen content, achieving the effect of partial sharing and partial privacy protection. When only the backlight source 260 and the second light source 52 are turned on, since the partial privacy module 100A is fully transparent, the display screen 310 can provide a viewing angle V1 with a full-screen sharing effect.

[0116] In an unillustrated embodiment, the partial anti-peeping module 100A in the partial anti-peeping display device 300 is replaced with the partial anti-peeping module 100. When the first light source 50 is turned off and only the backlight source 260 is turned on, the partial anti-peeping display device 300 can provide the user with a positive viewing angle with a smaller viewing angle, that is, a full-screen anti-peeping effect. Conversely, when the first light source 50 is turned on and the backlight source 260 is turned on, the partial anti-peeping display device 300 can enable the user with a positive viewing angle to share the screen content of the first partial display area PA1 with the bystander on one side, while the bystander on the other side still cannot see the screen content, achieving the effect of partial sharing and partial anti-peeping.

[0117] Fig.14 FIG. 2 is a cross-sectional schematic diagram of a portion of an anti-peeping display device according to a second embodiment of the present invention. Fig.14 As shown, the partial anti-peeping display device 300A includes a backlight module 200A, a partial anti-peeping display device 100H and a display screen 310, but is not limited thereto. The partial anti-peeping module 100H has been described in the previous section and will not be repeated. In one embodiment, the backlight module 200A is an edge-entry backlight module, including a lower light guide plate 220, an optical film group 240 and a backlight source 260A. The lower light guide plate 220 and the optical film group 240 are arranged opposite to each other, and the backlight source 260A is arranged on one side of the lower light guide plate 220. Among them, in the orthographic projection from the display screen 310 to the backlight module 200, the first block A1 of the first upper light guide plate 10 and the third block A3 of the third upper light guide plate 30 do not overlap and are not adjacent, and the first block A1 and the third block A3 overlap with the first partial display area PA1 and the second partial display area PA2 of the display screen 310, respectively, but is not limited thereto.

[0118] When only the backlight source 260A is turned on, the backlight source 260 forms collimated light 262 through the privacy film 40 and transmits it to the display screen. The partial privacy protection display device 300A can provide the user with a small positive viewing angle, that is, a full-screen privacy protection effect. When only the first light source 50 and the backlight source 260A are turned on, the user with the positive viewing angle can share the content of the first partial display area PA1 with the bystander on one side, while the bystander on the other side still cannot see it, achieving the effect of partial sharing and partial privacy protection (such as Fig.13 As shown). The sharing method of the second partial display area PA2 is similar to that of the first partial display area PA1, except that the light source providing the light and the upper light guide plate corresponding to the light source are different. When only the backlight source 260 and the third light source 54 are turned on, in addition to the collimated light 262 providing the user with a smaller front viewing angle, the third light source 54 is reflected or refracted through the third block A3 to provide the second partial display area PA2 with a smaller and biased side viewing angle, forming a viewing angle V3, and the viewing angle V3 is biased away from the third light source 54; that is, when the backlight source 260 and the third light source 54 are turned on at the same time, the user with the front viewing angle can share the content of the second partial display area PA2 with the bystander on one side, while the bystander on the other side still cannot see it, achieving the effect of partial sharing and partial anti-peeping.

[0119] Fig.15 FIG. 1 is a cross-sectional schematic diagram of a portion of an anti-peeping display device according to a third embodiment of the present invention. Fig.15 As shown, the partial anti-peeping display device 300B includes a backlight module 200A, a partial anti-peeping module 100C and a display screen 310, but is not limited thereto, wherein the backlight module 200A and the partial anti-peeping module 100C have been described in the previous section and will not be repeated. The effects when only the backlight source 260A is turned on, or only the backlight source 260A and the first light source 50 are turned on, or only the backlight source 260A and the second light source 54 are turned on, or only the backlight source 260A and the third light source 54 are turned on have been described in the previous section and will not be repeated.

[0120] It can be understood that when the backlight source 260, the first light source 50 and the third light source 54 are turned on and the second light source 52 is turned off, the user at the normal viewing angle can share the screen contents of the first partial display area PA1 and the second partial display area PA2 with the bystander on one side at the same time, while the bystander on the other side cannot see the screen contents, thereby achieving the effect of partial sharing and partial anti-peeping.

[0121] Combined with the above description, it can be understood that as long as the second light source 52 is turned on, the partial anti-peeping device 300 / 300A / 300B can present a full-screen sharing effect, and the turning on of the first light source 50 and / or the third light source 54 affects the partial sharing and partial anti-peeping effect of the first partial display area PA1 and / or the second partial display area PA2. Although turning off the backlight source 260 does not affect the viewing angle V1 / V2 / V3, it will affect the overall brightness, which is more obvious for users with a normal viewing angle.

[0122] Another example Figures 13 to 15 As shown, the partial anti-peeping display device 300 / 300A further includes at least one switch key 60, and the switch key 60 is electrically connected to at least one of the backlight source 260 / 260A, the first light source 50, the second light source 52, and the third light source 54. The switch key 60 is suitable for controlling the different light sources to be turned on or off. In one embodiment, the switch key 60 is a segmented switch key, which can be electrically connected to the first light source 50 and the second light source 52, or the first light source 50, the second light source 52, and the third light source 54 at the same time, so as to control the partial anti-peeping display device 300 / 300A to present a full anti-peeping, full sharing, or partial sharing (partial anti-peeping) effect.

[0123] In some anti-peeping display devices 300 / 300A / 300B, the optical film group 240 includes at least one of at least one diffuser, at least one brightness enhancement film, and at least one prism sheet, wherein the diffuser can make the light 261 transmitted from the backlight source 260 / 260A to some anti-peeping modules 100A / 100C / 100H more uniform, the brightness enhancement sheet can make the intensity of the light 261 transmitted from the backlight source 260 / 260A to some anti-peeping modules 100A / 100C / 100H stronger, the prism sheet can adjust the angle of the light 261 to some anti-peeping modules 100A / 100C / 100H, and especially the inverse prism can make the light 261 provided by the backlight source 260 / 260A have a better collimation effect after penetrating the anti-peeping sheet 40.

[0124] Based on the above, it can be understood that the backlight module 200 / 200A and the display screen 310 can be combined with any of the aforementioned anti-peeping modules 100 / 100A / 100B / 100C / 100D / 100E / 100F / 100G / 100H or their variations to form a partial anti-peeping display device.

[0125] The present invention uses the difference in microstructure distribution density to cause different degrees of refraction and reflection of the light from the light source entering the light guide plate. The upper light guide plate with different microstructure configurations and the corresponding light source are combined to form a partial privacy protection module, thereby presenting different light output brightness in different areas and the light output angle has a biased effect. When using a partial privacy protection display device composed of such a partial privacy protection module, a backlight module and a display screen, the partial privacy protection display device can present full-screen privacy protection, full-screen sharing and partial sharing (partial privacy protection) effects by switching different light sources, and the partial sharing effect has the effect of single-side sharing for users with a normal viewing angle.

[0126] 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 to which the present invention belongs 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 scope of the attached patent application.

Claims

1. A partial privacy protection module, characterized in that: Include: A privacy film; a first upper light guide plate, disposed on one side of the privacy film, the first upper light guide plate comprising a first light incident surface, a first light emitting surface, a first bottom surface and a plurality of first microstructures, the first bottom surface facing the privacy film, the first light emitting surface opposite to the first bottom surface, the first light incident surface connecting the first light emitting surface and the first bottom surface, the plurality of first microstructures being disposed on at least one of the first light emitting surface and the first bottom surface, wherein the first upper light guide plate has at least one first block and at least one second block adjacent to each other, and an average distribution density of a portion of the plurality of first microstructures in the at least one first block is greater than an average distribution density of another portion of the plurality of first microstructures in the at least one second block; and A first light source is disposed on one side of the first light incident surface.

2. The partial privacy protection module according to claim 1, characterized in that: The partial privacy protection module further includes a second upper light guide plate and a second light source, wherein the second upper light guide plate is disposed on a side of the privacy protection sheet adjacent to the first upper light guide plate, the second upper light guide plate includes a second light emitting surface, a second bottom surface, a second light incident surface, and a plurality of second microstructures, wherein the second light emitting surface is opposite to the second bottom surface, the second light incident surface is connected to the second light emitting surface and the second bottom surface, and the plurality of second microstructures are disposed on at least one of the second light emitting surface and the second bottom surface. The second light source is disposed on one side of the second light incident surface, wherein the further away from the second light source, the smaller the spacing between the plurality of second microstructures.

3. The partial privacy protection module according to claim 2, characterized in that: When the plurality of first microstructures are not disposed on the first bottom surface corresponding to the at least one first block, the plurality of first microstructures are not disposed on the first bottom surface corresponding to the at least one second block; or when the plurality of first microstructures are not disposed on the first light emitting surface corresponding to the at least one first block, the plurality of first microstructures are not disposed on the first light emitting surface corresponding to the at least one second block.

4. The partial privacy protection module according to claim 3, characterized in that: The average distribution density of the plurality of first microstructures in the at least one second area is zero.

5. The partial privacy protection module according to claim 1, characterized in that: The number of the at least one first block is two, the number of the at least one second block is one, and the second block is between the two first blocks.

6. The partial privacy protection module according to claim 1, characterized in that: When the plurality of first microstructures are protruding structures, they have a first height; when the plurality of second microstructures are protruding structures, they have a second height, the first height is greater than 0 mm and less than or equal to 0.025 mm, and the second height is greater than 0 mm and less than or equal to 0.025 mm; or when the plurality of first microstructures are recessed structures, they have a first depth; when the plurality of second microstructures are recessed structures, they have a second depth, the first depth is greater than 0 mm and less than or equal to 0.025 mm, and the second depth is greater than 0 mm and less than or equal to 0.025 mm.

7. The partial privacy protection module according to claim 1, characterized in that: The cross-section of the multiple first microstructures parallel to the first bottom surface or the first light-emitting surface has a first length, and the cross-section of the multiple second microstructures parallel to the second bottom surface or the second light-emitting surface has a second length, the first length is greater than 0 mm and less than or equal to 0.05 mm, and the second length is greater than 0 mm and less than or equal to 0.05 mm.

8. The partial privacy protection module according to claim 1 or 2, characterized in that: It also includes a third upper light guide plate and a third light source, wherein: The third upper light guide plate is arranged on a side of the first upper light guide plate away from the privacy film, the third upper light guide plate comprises a third light emitting surface, a third bottom surface, a third light incident surface and a plurality of third microstructures, the third light emitting surface is opposite to the third bottom surface, the third bottom surface is opposite to the first light emitting surface, the third light incident surface is connected to the third light emitting surface and the third bottom surface, the plurality of third microstructures are arranged on at least one of the third light emitting surface and the third bottom surface, wherein the third upper light guide plate has at least one third block and at least one fourth block adjacent to each other, the average distribution density of a portion of the plurality of third microstructures in the at least one third block is greater than the average distribution density of another portion of the plurality of third microstructures in the at least one fourth block, The third light source is disposed at one side of the third light incident surface, and in the orthographic projection from the third upper light guide plate to the privacy film, the at least one third block does not completely overlap with the at least one first block.

9. The partial privacy protection module according to claim 8, characterized in that: When the plurality of third microstructures are not disposed on the third bottom surface corresponding to the at least one third block, the plurality of third microstructures are not disposed on the third bottom surface corresponding to the at least one fourth block; or when the plurality of third microstructures are not disposed on the third light-emitting surface corresponding to the at least one third block, the plurality of third microstructures are not disposed on the third light-emitting surface corresponding to the at least one fourth block.

10. The partial privacy protection module as claimed in claim 9, characterized in that: The average distribution density of the plurality of third microstructures in the at least one fourth block is zero.

11. The partial privacy protection module according to claim 9, characterized in that: The number of the at least one fourth block is two, the number of the at least one third block is one, and the third block is between the two fourth blocks.

12. The partial privacy protection module according to claim 8, wherein: When the plurality of third microstructures are protruding structures, they have a third height greater than 0 mm and less than or equal to 0.025 mm; or, when the plurality of third microstructures are recessed structures, they have a third depth greater than 0 mm and less than or equal to 0.025 mm.

13. The partial privacy protection module according to claim 8, characterized in that: The cross sections of the plurality of third microstructures parallel to the third bottom surface or the third light emitting surface have a third length, and the third length is greater than 0 mm and less than or equal to 0.05 mm.

14. A partially anti-peeping display device, characterized in that: Include: A backlight module, comprising a lower light guide plate and an optical film set, wherein the lower light guide plate and the optical film set are arranged opposite to each other; A part of the privacy protection module is arranged on a side of the optical film group away from the lower light guide plate, and the part of the privacy protection module includes: A privacy film; a first upper light guide plate, disposed on one side of the privacy film, the first upper light guide plate comprising a first light incident surface, a first light emitting surface, a first bottom surface and a plurality of first microstructures, the first bottom surface facing the privacy film, the first light emitting surface opposite to the first bottom surface, the first light incident surface connecting the first light emitting surface and the first bottom surface, the plurality of first microstructures being disposed on at least one of the first light emitting surface and the first bottom surface, wherein the first upper light guide plate has at least one first block and at least one second block adjacent to each other, and an average distribution density of a portion of the plurality of first microstructures in the at least one first block is greater than an average distribution density of another portion of the plurality of first microstructures in the at least one second block; and a first light source, disposed on one side of the first light incident surface; and A display panel is arranged on a side of the anti-peeping module away from the backlight module.

15. The partially anti-peeping display device according to claim 14, characterized in that: This partial anti-peeping module further includes a second upper light guide plate and a second light source. The second upper light guide plate is arranged on a side of the anti-peeping film adjacent to the first upper light guide plate. The second upper light guide plate includes a second light emitting surface, a second bottom surface, a second light incident surface and a plurality of second microstructures. The second light emitting surface is opposite to the second bottom surface, the second light incident surface is connected to the second light emitting surface and the second bottom surface, the plurality of second microstructures are arranged on at least one of the second light emitting surface and the second bottom surface, and the second light source is arranged on one side of the second light incident surface, wherein the farther away from the second light source, the smaller the spacing between the plurality of second microstructures.

16. The partially anti-peeping display device according to claim 14 or 15, characterized in that: The partial privacy protection module further includes a third upper light guide plate and a third light source, wherein the third upper light guide plate is arranged on a side of the first upper light guide plate away from the privacy protection film, the third upper light guide plate includes a third light emitting surface, a third bottom surface, a third light incident surface and a plurality of third microstructures, the third light emitting surface is opposite to the third bottom surface, the third bottom surface is opposite to the first light emitting surface, the third light incident surface is connected to the third light emitting surface and the third bottom surface, the plurality of third microstructures are arranged on at least one of the third light emitting surface and the third bottom surface, wherein the third upper light guide plate has at least one third block and at least one fourth block adjacent to each other, the average distribution density of a portion of the plurality of third microstructures in the at least one third block is greater than the average distribution density of another portion of the plurality of third microstructures in the fourth block, the third light source is arranged on one side of the third light incident surface, and in the orthographic projection from the third upper light guide plate to the privacy protection film, the at least one third block does not completely overlap with the at least one first block.

17. The partially anti-peeping display device according to claim 16, characterized in that: The device further comprises at least one switch key, wherein the at least one switch key is electrically connected to at least one of the first light source and the third light source.

18. The partially anti-peeping display device according to claim 16, characterized in that: The optical film set includes at least one of at least one diffusion sheet, at least one brightness enhancement film, and at least one prism sheet, and the backlight module is a direct-type backlight module or an edge-type backlight module.

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