Flexible Touch Display Module and Touch Display Device Having the Same

Abstract

The present invention discloses a flexible touch display module and a touch display device having the same. The flexible touch display module includes: a flexible display panel, a flexible cover plate, a linear polarizer layer, a first retardation plate, and a second retardation plate. The flexible cover plate is disposed on the display side of the flexible display panel. The linear polarizer layer is disposed between the flexible display panel and the flexible cover plate, and the absorption axis angle of the linear polarizer layer is 90°. The first retardation plate is disposed between the linear polarizer layer and the flexible cover plate. The first retardation plate includes a first retardation film, and the first retardation film is a liquid crystal layer having a quarter-wave plate phase retardation. The first retardation film has a major axis and a minor axis in a plane parallel to the flexible display panel, and the included angle between the extending direction of the minor axis of the first retardation film and the absorption axis of the linear polarizer layer is 45°. The second retardation plate is disposed between the linear polarizer layer and the flexible display panel. According to the flexible touch display module of the present invention, it has a thin thickness, good flexibility, strong tensile properties, and at the same time has a function of being free of sunglasses.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and in particular, to a flexible touch display module and a touch display device having the same. Background Art

[0002] In the flexible touch display module in the related art, a flexible hardened cover plate and a polarizer are adopted. Since the polarizer is composed of multiple layers of films such as a PVA (polyvinyl alcohol) film and a TAC (triacetyl cellulose) film, the overall thickness of the flexible touch display module is relatively thick, and the total thickness of the stacking of the two structures is more than 300 μm, which greatly limits the bending performance of the flexible touch display module. Moreover, in the process of the reliability test of the flexible touch display module in the related art, cracks in the absorption axis direction are likely to occur. In addition, in the flexible touch display module in the related art, in the outdoor ambient light usage scenario, users will experience serious darkening at a certain angle when wearing sunglasses and cannot see clearly. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this reason, the present invention provides a flexible touch display module, which has a thin thickness, good flexibility, stronger tensile properties, and at the same time has a function of eliminating the need for sunglasses.

[0004] The present invention also provides a touch display device having the above flexible touch display module.

[0005] The flexible touch display module according to the first aspect embodiment of the present invention includes: a flexible display panel; a flexible cover plate disposed on the display side of the flexible display panel; a linear polarizer layer disposed between the flexible display panel and the flexible cover plate, and the absorption axis angle of the linear polarizer layer is 90°; a first retardation plate disposed between the linear polarizer layer and the flexible cover plate, the first retardation plate includes a first retardation film, the first retardation film is a liquid crystal layer having a quarter-wave retardation, the first retardation film has a major axis and a minor axis in a plane parallel to the flexible display panel, and the included angle between the extending direction of the minor axis of the first retardation film and the absorption axis of the linear polarizer layer is 45°; and a second retardation plate disposed between the linear polarizer layer and the flexible display panel.

[0006] The flexible touch display module according to the embodiment of the present invention has a thin thickness, good flexibility, stronger tensile properties, and at the same time has a function of eliminating the need for sunglasses.

[0007] In some embodiments, the flexible cover plate is a single-layer or multi-layer structure, and the material of the flexible cover plate includes one or a combination of two or more of polyimide, polyethylene terephthalate, polycarbonate, polyarylate, polysulfone, polyethylene naphthalate, fiber-reinforced plastic, ultra-thin glass, and dodecyl polymethacrylate.

[0008] In some embodiments, the linear polarizer layer includes at least one of an iodine-based polarizing film and a dye-based polarizing film.

[0009] In some embodiments, the first retardation plate further includes: a second retardation film, the second retardation film is a liquid crystal layer having a half-wavelength phase delay, the second retardation film has a major axis and a minor axis in a plane parallel to the flexible display panel, and the second retardation film is located between the first retardation film and the linear polarizer layer.

[0010] In some embodiments, the second retardation plate includes: a third retardation film, the third retardation film is a liquid crystal layer having a quarter-wavelength phase delay, and the third retardation film has a major axis and a minor axis in a plane parallel to the flexible display panel.

[0011] In some embodiments, the second retardation plate further includes: a fourth retardation film, the fourth retardation film is a liquid crystal layer having a half-wavelength phase delay, the fourth retardation film has a major axis and a minor axis in a plane parallel to the flexible display panel, and the fourth retardation film is located between the third retardation film and the linear polarizer layer.

[0012] In some embodiments, the angle between the extending direction of the minor axis of the fourth retardation film and the absorption axis of the linear polarizer layer is a1, a1 = 15° ± 5°, and the angle between the extending direction of the minor axis of the third retardation film and the absorption axis of the linear polarizer layer is a2, a2 = 2a1 + 45°.

[0013] In some embodiments, the first retardation plate is bonded to the flexible cover plate, and / or the first retardation plate is bonded to the linear polarizer layer.

[0014] In some embodiments, the second retardation plate is bonded to the flexible display panel, and / or the second retardation plate is bonded to the linear polarizer layer.

[0015] In some embodiments, the flexible touch display module includes, in order from the display side to the non-display side: the flexible cover plate, a first adhesive layer, the first retardation film, a second adhesive layer, the linear polarizer layer, a third adhesive layer, the third retardation film, a fourth adhesive layer, and the flexible display panel.

[0016] In some embodiments, the flexible touch display module includes, arranged in sequence from the display side to the non-display side: the flexible cover plate, the first adhesive layer, the first retardation film, the second adhesive layer, the linear polarizer layer, the third adhesive layer, the fourth retardation film, the third retardation film, the fourth adhesive layer, and the flexible display panel.

[0017] The touch display device according to the second aspect embodiment of the present invention includes the flexible touch display module according to the first aspect embodiment of the present invention.

[0018] The touch display device according to the embodiment of the present invention, by providing the flexible touch display module of the above first aspect embodiment, has a thin thickness, good flexibility, strong tensile properties, and at the same time has a non-sunglasses function.

[0019] The additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0020] Figure 1 is a schematic cross-sectional view of a flexible touch display module according to an embodiment of the present invention;

[0021] Figure 2 is a schematic cross-sectional view of a flexible touch display module according to another embodiment of the present invention;

[0022] Figure 3 is a schematic cross-sectional view of a flexible touch display module according to still another embodiment of the present invention;

[0023] Figure 4 is a schematic cross-sectional view of a flexible touch display module according to yet another embodiment of the present invention;

[0024] Figure 5 is a schematic view of a touch display device according to an embodiment of the present invention;

[0025] Figure 6 is a strain-stress curve diagram of the absorption axis of the linear polarizer layer at different angles according to an embodiment of the present invention.

[0026] Reference Numerals:

[0027] Touch display device 1000; Flexible touch display module 100;

[0028] Flexible display panel 1; Flexible cover plate 2; Linear polarizer layer 3;

[0029] First retardation plate 4; First retardation film 41; Second retardation film 42;

[0030] The second phase difference plate 5; the third phase difference film 51; the fourth phase difference film 52;

[0031] The first adhesive layer 61; the second adhesive layer 62; the third adhesive layer 63; the fourth adhesive layer 64;

[0032] The back support material 7. Specific embodiments

[0033] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0034] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the applicability of other processes and / or the use of other materials.

[0035] In the flexible touch display module in the related art, a flexible hardened cover plate and a polarizer are adopted. Since the polarizer is composed of multiple layers of films such as a PVA (polyvinyl alcohol) film and a TAC (triacetyl cellulose) film, the overall thickness of the flexible touch display module is relatively thick. The total thickness of the two structures stacked is more than 300 μm, which greatly limits the bending performance of the flexible touch display module. Moreover, in the reliability test process of the flexible touch display module in the related art, cracks in the absorption axis direction are likely to occur. In addition, in the outdoor ambient light usage scenario of the flexible touch display module in the related art, users will experience severe darkening at a certain angle and cannot see clearly when wearing sunglasses. In order to solve at least one of the above technical problems, the present invention proposes a flexible touch display module 100 and a touch display device 1000 having the same.

[0036] Next, with reference to the drawings, a flexible touch display module 100 according to an embodiment of the first aspect of the present invention will be described.

[0037] As Figure 1As shown in the figure, the flexible touch display module 100 includes: a flexible display panel 1, a flexible cover plate 2, a linear polarizer layer 3, a first retardation plate 4, and a second retardation plate 5. The flexible cover plate 2 is disposed on the display side of the flexible display panel 1. The linear polarizer layer 3 is disposed between the flexible display panel 1 and the flexible cover plate 2. The first retardation plate 4 is disposed between the linear polarizer layer 3 and the flexible cover plate 2. The second retardation plate 5 is disposed between the linear polarizer layer 3 and the flexible display panel 1. That is to say, the flexible display panel 1, the second retardation plate 5, the linear polarizer layer 3, the first retardation plate 4, and the flexible cover plate 2 are sequentially arranged along the direction from the non-display side to the display side.

[0038] In an embodiment of the present invention, the "linear polarizer layer 3" refers to a highly oriented polymer film, such as a film made of polyvinyl alcohol (PVC) as a substrate and adsorbed with a dichroic dye, and has a linear polarization function. Thus, in the present application, by combining the linear polarizer layer 3 with the flexible cover plate 2 to replace the combination of the flexible hard cover plate and the polarizer in the related art, the thickness of the flexible touch display module 100 can be reduced, which is beneficial to the flexible bending of the flexible touch display module 100.

[0039] Integrated

[0040] In an embodiment of the present invention, the absorption axis angle of the linear polarizer layer 3 is 90°. It should be noted that for the rectangular flexible touch display module 100, the extension direction of the short side is parallel to the extension direction of the folding line, and the extension direction of the folding line is defined as the 0° direction. In this way, when the absorption axis angle of the linear polarizer layer 3 is 90°, it means that the extension direction of the absorption axis of the linear polarizer layer 3 is perpendicular to the extension direction of the folding line, or in other words, the extension direction of the absorption axis of the linear polarizer layer 3 is parallel to the long side direction of the flexible touch display module 100. Thus, the flexible touch display module 100 can have stronger tensile resistance, improve or avoid the problem of cracks in the absorption axis direction during the bending process of the flexible touch display module 100, that is, it has strong mechanical bending characteristics.

[0041] For example Figure 6 As shown in the figure, it shows the stress comparison diagrams when the absorption axis angles of the linear polarizer layer 3 are 0°, 45°, and 90° when the linear polarizer layer 3 is a PVA film. It can be seen from the figure that when the absorption axis angle of the linear polarizer layer 3 is 90°, the flexible touch display module 100 has stronger tensile resistance. And by setting the absorption axis angle of the linear polarizer layer 3 to 90°, it is beneficial to the cutting of the linear polarizer layer 3. More linear polarizer layers 3 can be cut out on the linear polarizer mother film of the same size, thereby improving the material utilization rate of the flexible touch display module 100, saving material costs, and reducing the process.

[0042] In an embodiment of the present invention, as Figure 1As shown in the figure, the first retardation plate 4 includes a first retardation film 41, and the first retardation film 41 is a liquid crystal layer with a quarter-wavelength phase retardation, that is, the light wave generates a quarter-wavelength phase difference when passing through the first retardation film 41. The first retardation film 41 has a major axis and a minor axis in a plane parallel to the flexible display panel 1. When the absorption axis angle of the linear polarizer layer 3 is 90°, the included angle between the extending direction of the minor axis of the first retardation film 41 and the absorption axis of the linear polarizer layer 3 is 45°. Thus, the flexible touch display module 100 can have a sunglass-free function (abbreviated as the non-sunglasses function), that is, in the outdoor ambient light usage scenario, there will be no phenomenon that it becomes severely dim at a certain angle and is not clear to see due to wearing sunglasses.

[0043] In summary, the flexible touch display module 100 according to the embodiment of the present invention is thin in thickness, good in flexibility, reduces material costs, is convenient for process processing, has stronger tensile properties, and at the same time has a sunglass-free function.

[0044] In some embodiments of the present invention, the flexible cover plate 2 is a single-layer or multi-layer structure. For example, the material of the flexible cover plate 2 includes one or a combination of two or more of polyimide, polyethylene terephthalate, polycarbonate, polyarylate, polyethersulfone, polyethylene naphthalate, fiber-reinforced plastic, ultra-thin glass, and dodecyl polymethacrylate. Thus, it can have good flexibility and protective performance. Of course, the present invention is not limited thereto. In other embodiments of the present invention, the flexible cover plate 2 can also be made of other materials, which will not be elaborated here. It can be understood that in order to ensure the display effect, the flexible cover plate 2 is transparent.

[0045] In some embodiments of the present invention, the linear polarizer layer 3 includes at least one of an iodine-based polarizing film and a dye-based polarizing film. Among them, the iodine-based polarizing film can be, for example: made of polyvinyl alcohol (PVC) as a substrate and adsorbed with a dye containing iodine. Thus, the linear polarization performance is good, and the flexibility of the flexible touch display module 100 is ensured to be good. Of course, the present invention is not limited thereto. In other embodiments of the present invention, the linear polarizer layer 3 can also be made of other materials, which will not be elaborated here.

[0046] In some embodiments of the present invention, such as Figure 2As shown, the first retardation plate 4 further includes: a second retardation film 42, which is a liquid crystal layer having a half-wavelength phase retardation. The second retardation film 42 has a major axis and a minor axis in a plane parallel to the flexible display panel 1. The second retardation film 42 is located between the first retardation film 41 and the linear polarizer layer 3. That is to say, the second retardation film 42 is disposed between the first retardation film 41 and the linear polarizer layer 3, and the light wave generates a half-wavelength phase difference when passing through the second retardation film 42. Thus, for the light emitted from the non-display side to the display side, it has a good anti-reflection function and can ensure good flexibility of the flexible touch display module 100.

[0047] In some embodiments of the present invention, as Figure 2 shown, the second retardation plate 5 includes: a third retardation film 51, which is a liquid crystal layer having a quarter-wavelength phase retardation. The third retardation film 51 has a major axis and a minor axis in a plane parallel to the flexible display panel 1. That is to say, the third retardation film 51 is disposed between the flexible display panel 1 and the linear polarizer layer 3, and the light wave generates a quarter-wavelength phase difference when passing through the third retardation film 51. Thus, the conversion from linear polarization to circular polarization can be achieved, and for the light incident from the display side to the non-display side, it has a certain anti-reflection function and can ensure good flexibility of the flexible touch display module 100.

[0048] In some embodiments of the present invention, as Figure 3 shown, the second retardation plate 5 includes: a fourth retardation film 52, which is a liquid crystal layer having a half-wavelength phase retardation. The fourth retardation film 52 has a major axis and a minor axis in a plane parallel to the flexible display panel 1. The fourth retardation film 52 is located between the third retardation film 51 and the linear polarizer layer 3. That is to say, the fourth retardation film 52 is disposed between the third retardation film 51 and the linear polarizer layer 3, and the light wave generates a half-wavelength phase difference when passing through the fourth retardation film 52. Thus, for the light incident from the display side to the non-display side, it can have a better anti-reflection function and can ensure good flexibility of the flexible touch display module 100.

[0049] In some embodiments of the present invention, the included angle between the minor axis extension direction of the fourth retardation film 52 and the absorption axis of the linear polarizer layer 3 is a1, a1 = 15° ± 5°, and the included angle between the minor axis extension direction of the third retardation film 51 and the absorption axis of the linear polarizer layer 3 is a2, a2 = 2a1 + 45°. That is to say, the absorption axis direction of the linear polarizer layer 3 and the minor axis direction of the fourth retardation film 52 form a specific acute angle a1, and the included angle between the absorption axis direction of the linear polarizer layer 3 and the minor axis direction of the third retardation film 51 is a2, 10° ≤ a1 ≤ 20°, a2 = 2a1 + 45°. Thus, for the light incident from the display side to the non-display side, it can have a better anti-reflection function.

[0050] In some embodiments of the present invention, the first retardation plate 4 is adhered to the flexible cover plate 2. For example, it is adhered by the first adhesive layer 61 shown in Figure 1 . That is, only the first adhesive layer 61 exists between the first retardation plate 4 and the flexible cover plate 2, without other film layers, thereby effectively avoiding problems such as cracking during the bending process, ensuring connection reliability, and improving the flexible use effect of the flexible touch display module 100. For example, the first adhesive layer 61 can be a pressure-sensitive adhesive, etc.

[0051] In some embodiments of the present invention, the first retardation plate 4 is adhered to the linear polarizer layer 3. For example, it is adhered by the second adhesive layer 62 shown in Figure 1 . That is, only the second adhesive layer 62 exists between the first retardation plate 4 and the linear polarizer layer 3, without other film layers, thereby effectively avoiding problems such as cracking during the bending process, ensuring connection reliability, and improving the flexible use effect of the flexible touch display module 100. For example, the second adhesive layer 62 can be a nano-adhesive, etc.

[0052] In some embodiments of the present invention, the second retardation plate 5 is adhered to the linear polarizer layer 3. For example, it is adhered by the third adhesive layer 63 shown in Figure 1 . That is, only the third adhesive layer 63 exists between the second retardation plate 5 and the linear polarizer layer 3, without other film layers, thereby effectively avoiding problems such as cracking during the bending process, ensuring connection reliability, and improving the flexible use effect of the flexible touch display module 100. For example, the third adhesive layer 63 can be a nano-adhesive, etc.

[0053] In some embodiments of the present invention, the second retardation plate 5 is adhered to the flexible display panel 1. For example, it is adhered by the fourth adhesive layer 64 shown in Figure 1 . That is, only the fourth adhesive layer 64 exists between the second retardation plate 5 and the flexible display panel 1, without other film layers, thereby effectively avoiding problems such as cracking during the bending process, ensuring connection reliability, and improving the flexible use effect of the flexible touch display module 100. For example, the fourth adhesive layer 64 can be a pressure-sensitive adhesive, etc.

[0054] In the flexible touch display module in the related art, during the processing, a bonding process of a flexible hardening cover plate and a polarizer needs to be added, which makes the module process more complicated, and the stability and yield of the product are relatively low. However, for the flexible touch film group according to the embodiments of the present invention, a polarizer is not required, and the linear polarizer layer 3 can be simply pasted to the required position by using the above-mentioned bonding technology to complete the module manufacturing, thereby reducing the processing difficulty and improving the stability and production yield of the product.

[0055] More specifically, in some embodiments of the present invention, the flexible cover plate 2, the first adhesive layer 61, the first retardation plate 4, the second adhesive layer 62, the linear polarizer layer 3, the third adhesive layer 63, the second retardation plate 5, and the fourth adhesive layer 64 can form an integrated module, which is integrally bonded to the flexible display panel 1, thereby improving production efficiency.

[0056] Of course, the present invention is not limited thereto, and processes such as spraying can also be used to replace the above-mentioned bonding connection method, which will not be elaborated here.

[0057] Thus, as described above, the flexible touch display module 100 according to the embodiment of the first aspect of the present invention can have at least the following four specific examples.

[0058] Example 1: As Figure 1 shown, the flexible touch display module 100 includes, arranged in order from top to bottom: a flexible cover plate 2, a first adhesive layer 61, a first retardation film 41, a second adhesive layer 62, a linear polarizer layer 3, a third adhesive layer 63, a third retardation film 51, a fourth adhesive layer 64, and a flexible display panel 1.

[0059] Example 2: As Figure 2 shown, the flexible touch display module 100 includes, arranged in order from top to bottom: a flexible cover plate 2, a first adhesive layer 61, a first retardation film 41, a second retardation film 42, a second adhesive layer 62, a linear polarizer layer 3, a third adhesive layer 63, a third retardation film 51, a fourth adhesive layer 64, and a flexible display panel 1.

[0060] Example 3: As Figure 3 shown, the flexible touch display module 100 includes, arranged in order from top to bottom: a flexible cover plate 2, a first adhesive layer 61, a first retardation film 41, a second retardation film 42, a second adhesive layer 62, a linear polarizer layer 3, a third adhesive layer 63, a fourth retardation film 52, a third retardation film 51, a fourth adhesive layer 64, and a flexible display panel 1.

[0061] Example 4: As Figure 4 shown, the flexible touch display module 100 includes, arranged in order from top to bottom: a flexible cover plate 2, a first adhesive layer 61, a first retardation film 41, a second adhesive layer 62, a linear polarizer layer 3, a third adhesive layer 63, a fourth retardation film 52, a third retardation film 51, a fourth adhesive layer 64, and a flexible display panel 1.

[0062] In summary, the flexible touch display module 100 according to the above examples of the present invention is thin in thickness, good in flexibility, reduces material costs, has stronger tensile properties, and at the same time has the sunglassfree function, with good display and anti-reflection functions. Among them, the specific type of the flexible display panel 1 is not limited. For example, it can be an OLED display panel. In addition, according to the flexible touch display module 100 of the embodiment of the present invention, in some embodiments, it may further include a back support material 7 provided on the side of the flexible display panel 1 away from the flexible cover plate 2, that is, a back support material 7 provided on the non-display side of the flexible display panel 1, so as to achieve the effect of back support.

[0063] Next, a touch display device 1000 according to an embodiment of the second aspect of the present invention will be described.

[0064] As Figure 5 shown, the touch display device 1000 according to an embodiment of the present invention may include the flexible touch display module 100 of the above first aspect embodiment. Thus, the touch display device 1000 can have the characteristics of being thin in thickness and good in flexibility, and can reduce material costs, have stronger tensile properties, and at the same time have the sunglassfree function. It should be noted that the specific type of the touch display device 1000 according to the embodiment of the present invention is not limited. For example, it can be a mobile phone, a tablet computer, a smart wearable device, a home decoration device with the touch display device 1000, etc., which are not limited here. In addition, it should be noted that the size of the flexible touch display module 100 can be specifically designed according to the size of the touch display device 1000.

[0065] In a specific example of the present invention, the touch display device 1000 to which the flexible touch display module 100 is applied can be a mobile phone. The mobile phone has a screen with a length of 140 mm and a width of 70 mm. The mobile phone can be folded in half along the center line parallel to its short side. This center line is the folding line, that is, the 0° direction described above. The absorption axis angle of the linear retarder layer 3 is 90°. The first retardation film 41 is a liquid crystal layer with a quarter-wavelength phase delay. The included angle between the short-axis extension direction of the first retardation film 41 and the absorption axis of the linear retarder layer 3 is 45°. Thus, the touch display device 1000 can have the characteristics of being thin in thickness and good in flexibility, and can reduce material costs, have stronger tensile properties.

[0066] Other constitutions and operations of the touch display device 1000 according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0067] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0068] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A flexible touch display module (100), characterized in that, Comprising: A flexible display panel (1); A flexible cover plate (2), which is disposed on the display side of the flexible display panel (1); A linear polarizer layer (3), which is disposed between the flexible display panel (1) and the flexible cover plate (2), and the absorption axis angle of the linear polarizer layer (3) is 90°; A first retardation plate (4), which is disposed between the linear polarizer layer (3) and the flexible cover plate (2), and the first retardation plate (4) includes a first retardation film (41), and the first retardation film (41) is a liquid crystal layer having a quarter-wave retardation. The first retardation film (41) has a major axis and a minor axis in a plane parallel to the flexible display panel (1), and the included angle between the extending direction of the minor axis of the first retardation film (41) and the absorption axis of the linear polarizer layer (3) is 45°; And A second retardation plate (5), which is disposed between the linear polarizer layer (3) and the flexible display panel (1); The first retardation plate (4) further includes: a second retardation film (42), and the second retardation film (42) is a liquid crystal layer having a half-wave retardation. The second retardation film (42) has a major axis and a minor axis in a plane parallel to the flexible display panel (1), and the second retardation film (42) is located between the first retardation film (41) and the linear polarizer layer (3); The second retardation plate (5) includes: a third retardation film (51), and the third retardation film (51) is a liquid crystal layer having a quarter-wave retardation. The third retardation film (51) has a major axis and a minor axis in a plane parallel to the flexible display panel (1); The second retardation plate (5) further includes: a fourth retardation film (52), and the fourth retardation film (52) is a liquid crystal layer having a half-wave retardation. The fourth retardation film (52) has a major axis and a minor axis in a plane parallel to the flexible display panel (1), and the fourth retardation film (52) is located between the third retardation film (51) and the linear polarizer layer (3).

2. The flexible touch display module (100) according to claim 1, wherein The flexible cover plate (2) is a single-layer or multi-layer structure, and the material of the flexible cover plate (2) includes one or a combination of two or more of polyimide, polyethylene terephthalate, polycarbonate, polyarylate, polysulfone, polyethylene naphthalate, fiber-reinforced plastic, ultra-thin glass, and dodecyl polymethacrylate.

3. The flexible touch display module (100) according to claim 1, wherein, The linear polarizer layer (3) includes at least one layer of an iodine-based polarizing film and a dye-based polarizing film.

4. The flexible touch display module (100) according to claim 1, wherein, The included angle between the extending direction of the minor axis of the fourth retardation film (52) and the absorption axis of the linear polarizer layer (3) is a1, a1 = 15° ± 5°, and the included angle between the extending direction of the minor axis of the third retardation film (51) and the absorption axis of the linear polarizer layer (3) is a2, a2 = 2a1 + 45°.

5. The flexible touch display module (100) according to claim 1, characterized in that, The first retardation plate (4) is bonded to the flexible cover plate (2), and / or the first retardation plate (4) is bonded to the linear polarizer layer (3).

6. The flexible touch display module (100) according to claim 1, wherein, The second retardation plate (5) is bonded to the flexible display panel (1), and / or the second retardation plate (5) is bonded to the linear polarizer layer (3).

7. The flexible touch display module (100) according to claim 1, wherein, The flexible touch display module (100) includes, arranged in sequence from the display side to the non-display side: the flexible cover plate (2), the first adhesive layer (61), the first retardation film (41), the second adhesive layer (62), the linear polarizer layer (3), the third adhesive layer (63), the third retardation film (51), the fourth adhesive layer (64), and the flexible display panel (1).

8. The flexible touch display module (100) according to claim 1, characterized in that, The flexible touch display module (100) includes, arranged in sequence from the display side to the non-display side: the flexible cover plate (2), the first adhesive layer (61), the first retardation film (41), the second adhesive layer (62), the linear polarizer layer (3), the third adhesive layer (63), the fourth retardation film (52), the third retardation film (51), the fourth adhesive layer (64), and the flexible display panel (1).

9. A touch display device (1000), characterized in that, It includes the flexible touch display module (100) according to any one of claims 1-8.

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