Display module and display device

Abstract

The invention relates to a display module and a display device.The display module comprises a display panel and a single-axis optical film arranged on the light emitting side of the display panel, and light rays emitted by the display panel towards the single-axis optical film comprise linearly polarized light with the same polarization direction; the refractive index of the single-axis optical film comprises an ordinary refractive index no and an extraordinary refractive index ne and nogt; 1.4, and is ne-nogt; 0.05 of the total weight; in a preset visible light wavelength range, when the linearly polarized light with different wavelengths penetrates through the single-axis optical film, at least part of the linearly polarized light with the wavelengths is converted into circularly polarized light or elliptically polarized light, and the polarization directions of the circularly polarized light or elliptically polarized light with different wavelengths are different. The single-axis optical film in the display module provided by the invention can realize a depolarization effect, so that healthy eye-protection display is realized.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module and a display device. Background Art

[0002] Display is closely related to people's lives, and the display screen does more than just display. It integrates communication, video, payment, entertainment and other information. Healthy display is closely related to the eyes, so there are various healthy display certifications, especially low blue light, adaptive correction of ambient light brightness, screen flicker and other aspects are the focus of everyone's attention.

[0003] In addition to the above health display items, the polarization state of light has a greater impact on the human eye. Various human factor experiments have proved that circular polarization is more comfortable than linear polarization. Another evaluation agency has conducted a comparative evaluation of linear polarization, circular polarization and natural light depolarization displays. The result of the evaluation is that natural light depolarization is better than circular polarization, and circular polarization is better than linear polarization. Humans have adapted to natural light in thousands of years of biological evolution. The polarization components of natural light in all directions have the same intensity. Natural light passes through the cornea and lens before reaching the retina, and there is lutein before the retina. When the long axis of lutein is parallel to the polarization direction, it can absorb short-wave blue light, thereby reducing the damage of short-wave blue light to the retina. Long-term use of polarized light will cause the lutein in the vertical polarization direction to weaken its ability to absorb short-wave blue light, eventually causing damage to the retina and affecting vision.

[0004] Therefore, how to achieve healthy eye protection display has become an urgent problem that needs to be solved. Summary of the invention

[0005] The embodiments of the present application provide a display module and a display device, which can achieve a depolarization effect, thereby realizing a healthy eye-protecting display.

[0006] In order to achieve the above-mentioned object, according to a first aspect of the present application, a display module is provided, the display module comprising a display panel and a uniaxial optical film arranged on a light-emitting side of the display panel, the light emitted by the display panel toward the uniaxial optical film comprising linearly polarized light with the same polarization direction;

[0007] In which, the refractive index of the uniaxial optical film includes an ordinary refractive index no and an extraordinary refractive index ne, no>1.4, and |ne-no|>0.05; within a preset visible light wavelength range, when the linearly polarized light of different wavelengths passes through the uniaxial optical film, at least part of the wavelength of the linearly polarized light is converted into circularly polarized light or elliptically polarized light, and the polarization directions of the circularly polarized light or the elliptically polarized light of different wavelengths are different.

[0008] In some embodiments, the polarization directions of the linearly polarized light have equal intensity components in the directions of the ordinary refractive index no and the extraordinary refractive index ne.

[0009] In some embodiments, the phase retardation of the uniaxial optical film is greater than or equal to 10,000 and less than or equal to 16,000.

[0010] In some embodiments, the transmittance of the uniaxial optical film is greater than 90%.

[0011] In some embodiments, the thickness of the uniaxial optical film is greater than 50 micrometers and less than 500 micrometers.

[0012] In some embodiments, the preset visible light wavelength range includes 350 nanometers to 800 nanometers.

[0013] In some embodiments, the material of the uniaxial optical film is selected from liquid crystal materials or organic polymer materials;

[0014] The liquid crystal material includes cyanobiphenyl groups; the organic polymer material includes at least one of a polystyrene-based composite material, an organic polymer mixed material containing polystyrene, polyimide polycarbonate, polyethylene terephthalate and epoxy resin.

[0015] In some embodiments, when the material of the uniaxial optical film is selected from the liquid crystal material, 0.1≤|ne-no|≤0.3, and the thickness of the uniaxial optical film is greater than 50 micrometers and less than or equal to 100 micrometers.

[0016] In some embodiments, the display panel includes a display function layer and a polarizing function layer that are stacked, and the uniaxial optical film is located on a side of the polarizing function layer away from the display function layer.

[0017] According to a second aspect of the present application, a display device is also provided, comprising the display module described above.

[0018] In the display module and display device of the embodiment of the present application, by controlling the ordinary refractive index no of the uniaxial optical film located on the light-emitting side of the display panel to be greater than 1.4, and the absolute value of the difference between the ordinary refractive index no and the extraordinary refractive index ne to be greater than 0.05, within the preset visible light wavelength range, the linear polarized light of different wavelengths with the same polarization direction emitted by the display panel is at least partially converted into circular polarized light or elliptically polarized light with different polarization directions when passing through the uniaxial optical film, and these circular polarized light or elliptically polarized light with different polarization directions can form a depolarization effect similar to natural light after mixing, thereby having an eye protection effect. Therefore, the uniaxial optical film provided by the present application can be applied to the display module and the display device to achieve a healthy eye protection display.

[0019] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0021] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0022] Figure 1 is a structural schematic diagram of a display module provided in an embodiment of the present application;

[0023] Figure 2 It is a schematic diagram of a uniaxial optical film provided in an embodiment of the present application that converts linearly polarized light into circularly polarized light or elliptically polarized light;

[0024] Figure 3 It is a schematic diagram of the relationship between the phase delay of light and the wavelength of the light wave when light in a preset visible light wavelength range passes through a uniaxial optical film provided in an embodiment of the application;

[0025] Figure 4 It is a schematic diagram of the angle relationship between the ordinary refractive index direction and the extraordinary refractive index direction of a uniaxial optical film provided in an embodiment of the present application and the polarization direction of linearly polarized light;

[0026] Figure 5a to Figure 5h It is a schematic diagram of changes in transmittance and retardation when visible light of different wavelengths passes through a uniaxial optical film with a specific phase retardation provided by an embodiment of the present application;

[0027] Figure 6 is a schematic structural diagram of a polarizer provided in an embodiment of the present application;

[0028] Figure 7 is a schematic structural diagram of another polarizer provided in an embodiment of the present application;

[0029] Figure 8 It is a structural schematic diagram of a display device provided in an embodiment of the present application.

[0030] Explanation of the accompanying drawings: 1. Uniaxial optical film; 2. Polarizer; 3. Polarizing functional layer; 4. Substrate layer; 5. Compensation film; 6. Polarizing layer; 7. Adhesive layer; 8. Release film; 9. Display functional layer; 10. Display panel; 11. Display module; 12. Display device; 13. Frame. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0032] Usually, a wave plate can be added above the polarizer to convert linear polarization into elliptically polarized light. However, this elliptically polarized light also exhibits the characteristics of linear polarization at different times, and the intensity of each polarization direction is different. Patent document CN201765417U discloses that uniaxial crystal particles, such as natural crystal particles or artificial crystal particles such as quartz or calcite, are used on the outside of the upper polarizer to form a scattered film structure. At this time, the optical axis arrangement direction of each crystal particle is different. The linear polarization light at different positions forms circular polarization, elliptically polarized or other polarization after passing through the depolarization layer, and the polarization direction of each position is no longer consistent. The academic paper "Proposal of Novel Random Depolarization Film for Real-Color Displays with Sharp Images" also reports an eye protection scheme using low refractive index diffusion particles to achieve depolarized light. The principle of depolarized light is similar to that of patent document CN201765417U, and by reducing the refractive index difference between the diffusion particles and the substrate, the problem of contrast reduction caused by diffusion can be further reduced, and the contrast can be increased from 787 to 1026.

[0033] Different from the above-mentioned depolarization eye protection display solution of adding scattering particles into a transparent medium and achieving it by adjusting the refractive index of the scattering particles, the embodiment of the present application provides a solution of using a high-transparency uniaxial film layer to achieve the depolarization effect, converting linearly polarized light into a polarization effect close to natural light, thereby achieving a healthy eye protection display.

[0034] See also Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of a display module provided in an embodiment of the present application, Figure 2 It is a schematic diagram of a uniaxial optical film provided in an embodiment of the present application that converts linearly polarized light into circularly polarized light or elliptically polarized light.

[0035] like Figure 1As shown, the embodiment of the present application provides a display module 11, which includes a display panel 10 and a uniaxial optical film 1 arranged on the light-emitting side of the display panel 10, and the light emitted by the display panel 10 toward the uniaxial optical film 1 includes linearly polarized light with the same polarization direction. The refractive index of the uniaxial optical film 1 includes an ordinary refractive index no and an extraordinary refractive index ne; wherein no>1.4, and |ne-no|>0.05.

[0036] like Figure 2 As shown, within the preset visible light wavelength range, when linearly polarized light of different wavelengths with the same polarization direction passes through the uniaxial optical film 1, at least part of the linearly polarized light of the wavelength is converted into circularly polarized light or elliptically polarized light, and the circularly polarized light or the elliptically polarized light of different wavelengths have different polarization directions.

[0037] For example, the first light emitted by the display panel 10 is converted into the second light when passing through the uniaxial optical film 1, the first light and the second light are both within the preset visible light wavelength range, the first light includes a plurality of linear polarized lights with different wavelengths and the same polarization direction, and the second light includes a plurality of circular polarized lights or elliptically polarized lights with different wavelengths and different polarization directions. Therefore, the second light is similar to natural light.

[0038] It can be understood that the material of the uniaxial optical film 1 is a uniaxial material, and the refractive index along different directions of the uniaxial material is different, there is an ordinary refractive index no and an extraordinary refractive index ne, and usually there is a difference between these two refractive indices.

[0039] In the embodiment of the present application, by controlling the ordinary refractive index no of the uniaxial optical film 1 to be greater than 1.4, and the absolute value of the difference between the ordinary refractive index no and the extraordinary refractive index ne to be greater than 0.05, within the preset visible light wavelength range, linear polarized light of different wavelengths with the same polarization direction is at least partially converted into circular polarized light or elliptically polarized light with different polarization directions when passing through the uniaxial optical film 1. These circular polarized light or elliptically polarized light with different polarization directions can form a depolarization effect similar to natural light after mixing, thereby having an eye protection effect. Therefore, the uniaxial optical film 1 provided by the present application can be applied to the display module 11 to achieve a healthy eye protection display.

[0040] In some embodiments, the preset visible light wavelength range includes 350 nanometers (nm) to 800 nanometers. It is understandable that light within this range can be perceived by the human eye, and within this wavelength range, light waves of different colors are included, such as red light waves, green light waves, and blue light waves, which is conducive to achieving color display.

[0041] In some embodiments, each pixel in the display panel 10 emits visible light in the range of 350nm to 800nm. For a uniaxial optical film 1 with uniform thickness, when |ne-no| is a certain value, its optical path varies with the thickness. Under a certain optical path, the optical path difference or phase delay of visible light of different wavelengths is different.

[0042] See also Figure 3 , Figure 3 Schematic diagram of the relationship between the phase delay of light and the wavelength of the light wave when light in a preset visible light wavelength range passes through a uniaxial optical film provided in an embodiment of the application. Figure 3 As shown, when the thickness of the uniaxial optical film is constant, the larger the wavelength of visible light is, the smaller the phase delay when the light passes through the uniaxial optical film is.

[0043] Generally, the light waves emitted by the same pixel in the display line plate 10 form linear polarized light with the same polarization direction after passing through the polarizer. When these linear polarized lights of different wavelengths pass through the uniaxial optical film 1, they will form circular polarized light or elliptically polarized light with different polarization directions after different phase delays. These circular polarized light or elliptically polarized light with different polarization directions will form a natural light-like depolarization effect after mixing, thereby achieving a natural light-like depolarization effect. Figure 2 shown.

[0044] It can be understood that the uniaxial optical film 1 of the embodiment of the present application is arranged above the polarizer on the observer (user) side when used, that is, it is arranged between the upper polarizer in the display module 11 and the observer, so that the display light received by the observer's eyes is natural light, thereby achieving an eye protection effect.

[0045] like Figure 2 As shown, linearly polarized light is converted into natural light after passing through the uniaxial optical film 1, thereby achieving a depolarization effect. When the polarized natural light reaches the macular area of ​​the fundus, a healthy eye protection display effect is formed in which short-wave blue light in all directions can be weakened.

[0046] In some embodiments, the intensity components of the polarization directions of the linearly polarized light in the directions of the ordinary refractive index no and the extraordinary refractive index ne are equal, so that a better depolarization effect can be achieved.

[0047] See also Figure 4 , Figure 4 Schematic diagram of the angle relationship between the ordinary refractive index direction and the extraordinary refractive index direction of a uniaxial optical film provided in an embodiment of the present application and the polarization direction of linear polarized light. Figure 4As shown, the angle between the direction of the extraordinary refractive index ne and the polarization direction of the linear polarized light is θ1, and the angle between the direction of the ordinary refractive index no and the polarization direction of the linear polarized light is θ2, wherein 0°<θ1<90°, 0°<θ2<90°. It can be understood that the intensity components of the polarization direction of the linear polarized light in the direction of the ordinary refractive index no and the extraordinary refractive index ne are related to the angles of θ1 and θ2. When θ1=θ2, the component intensities in the direction of the ordinary refractive index no and the extraordinary refractive index ne are the same, so that the depolarization effect of the natural light-like linear polarized light with different wavelengths and the same polarization direction formed by the uniaxial optical film 1 is better.

[0048] In some embodiments, the phase retardation of the uniaxial optical film 1 is greater than or equal to 10,000 and less than or equal to 16,000.

[0049] See also Figure 5a to Figure 5h , Figure 5a to Figure 5h 1 is a schematic diagram of changes in transmittance and retardation when visible light of different wavelengths passes through a uniaxial optical film with a specific phase retardation provided by an embodiment of the present application. Figure 5a The corresponding phase delay of the uniaxial optical film is 1000. Figure 5b The corresponding phase delay of the uniaxial optical film is 5000. Figure 5c The corresponding phase delay of the uniaxial optical film is 6000. Figure 5d The corresponding phase delay of the uniaxial optical film is 8000. Figure 5e The corresponding phase delay of the uniaxial optical film is 10000. Figure 5f The corresponding phase delay of the uniaxial optical film is 12000. Figure 5g The corresponding phase delay of the uniaxial optical film is 14000. Figure 5h The corresponding phase retardation of the uniaxial optical film is 16000.

[0050] according to Figure 5a to Figure 5h It can be seen that when the phase delay of the uniaxial optical film is constant, the larger the wavelength of visible light, the smaller the delay after the light wave passes through the uniaxial optical film; the transmittance values ​​of visible light of different wavelengths fluctuate between 0 and 1; as the phase delay of the uniaxial optical film increases, the transmittance of visible light of different wavelengths changes more and more intensively between 0 and 1. When the transmittance of visible light of different wavelengths changes intensively enough, the difference in transmittance of visible light of different wavelengths is small and basically does not affect the white point coordinates. When the transmittance of visible light of different wavelengths changes greatly, the difference in transmittance of visible light of different wavelengths is significant. For example, when the phase delay of the uniaxial optical film is 1000, the color of the white point will change significantly (serious color deviation), resulting in a rainbow pattern phenomenon.

[0051] The present application also studies the influence of uniaxial optical films with different phase delays on RGB grayscale and color temperature change values ​​through a set of comparative examples and seven sets of examples. Among them, the optical films provided in the comparative examples have no phase delay value, and the phase delays of the uniaxial optical films provided in the seven sets of examples are 1000, 5000, 8000, 10000, 12000, 14000 and 16000 respectively. The RGB grayscale and color temperature change values ​​obtained after using the D65 standard light source (also known as international standard artificial daylight) through these eight films are shown in Table 1.

[0052] Table 1

[0053] Phase delay R G B Color temperature / K No delay 255 255 255 6500 1000 255 175 240 2060 5000 244 250 247 6645 8000 250 252 251 6553 10000 254 253 253 6484 12000 255 255 255 6480 14000 255 255 255 6500 16000 253 253 253 6515

[0054] According to Table 1, the RGB grayscale values ​​of the synthetic standard white point of the comparison example without delay are all 255, and the color temperature is 6500K (standard color temperature); the uniaxial optical films with different phase delays have different transmittances for different light wavelengths. When the phase delay of the uniaxial optical film is in the range of 1000 to 12000, as the phase delay of the uniaxial optical film increases, the RGB grayscale value of the synthetic standard white point gradually increases; when the phase delay of the uniaxial optical film is 12000 and 14000, the RGB grayscale value of the synthetic standard white point is all 255; when the phase delay of the uniaxial optical film is 14000, the color temperature is 6500K (standard color temperature); when the phase delay of the uniaxial optical film is in the range of 10000 to 16000, the RGB grayscale value and color temperature value of the synthetic standard white point are the same as or relatively close to those of the comparison example. Therefore, it is more appropriate to control the phase delay of the uniaxial optical film within the range of 10000 to 16000 (including the endpoint values), which can avoid the rainbow pattern phenomenon; when the phase delay of the uniaxial optical film is controlled within the range of 12000 to 14000 (including the endpoint values), it is a more preferred range; and particularly preferably, the phase delay of the uniaxial optical film is 14000. At this time, the RGB grayscale value and the color temperature value are exactly the same as those in the control ratio, both are standard values, and the color display effect is better.

[0055] In a specific implementation, the phase delay of the uniaxial optical film 1 is 14000, and at this time, the color effect of the visible light after passing through the uniaxial optical film 1 is better.

[0056] In some embodiments, the transmittance of the uniaxial optical film 1 is greater than 90%, that is, the uniaxial optical film 1 has high transparency and will not affect the light extraction rate of the display device when applied to the display device.

[0057] In some embodiments, the thickness of the uniaxial optical film 1 is greater than 50 micrometers and less than 500 micrometers. It can be understood that the thickness of the uniaxial optical film 1 can be adjusted according to its phase retardation.

[0058] In some embodiments, the material of the uniaxial optical film 1 is selected from liquid crystal materials or organic polymer materials. The liquid crystal material includes at least one of E7, 5CB and BL006; the organic polymer material includes at least one of polystyrene-based composite materials, organic polymer hybrid materials containing polystyrene, polyimide polycarbonate, polyethylene terephthalate and epoxy resin.

[0059] It should be noted that the liquid crystal material E7 is a mixed liquid crystal material, mainly containing a variety of cyanobiphenyl components; the liquid crystal material 5CB has a chemical name of 4-pentyl-4'-cyanobiphenyl and a chemical formula of C 16 H 15 N; Liquid crystal material BL006 is a liquid crystal compound with a specific molecular structure. The specific composition may vary depending on the manufacturer and product specifications, but generally contains specific molecular groups and structures that enable it to exhibit liquid crystal properties.

[0060] In some embodiments, when the material of the uniaxial optical film 1 is selected from liquid crystal materials, 0.1≤|ne-no|≤0.3, and the thickness of the uniaxial optical film 1 is greater than 50 microns and less than or equal to 100 microns. For example, when |ne-no|=0.2, the thickness of the uniaxial optical film 1 is 70 microns, and at this time, the phase retardation of the uniaxial optical film 1 is 14000.

[0061] It can be understood that when the material of the uniaxial optical film 1 is selected from the liquid crystal material, the liquid crystal material is oriented in a single direction to form a liquid crystal elastomer, and the orientation can be achieved by stretching, but is not limited to this; when the material of the uniaxial optical film 1 is selected from the organic polymer material, it can be oriented by mechanical stretching, light control or temperature control, but is not limited to this.

[0062] The embodiments of the present application also use two groups of comparative examples and two groups of embodiments to study the effects of whether the diffusion particle film in the aforementioned academic paper “Proposal of Novel Random Depolarization Film for Real-Color Displays with Sharp Images” is set on the light-emitting side of the display screen and whether the uniaxial optical film provided in the embodiments of the present application is set on the display contrast and extinction ratio. The results are shown in Table 2.

[0063] Table 2

[0064]

[0065] According to Table 2, comparative example 1 provides a first display screen which is not provided with a diffusion particle film and is not provided with the uniaxial optical film provided in the embodiment of the present application, and the contrast of the first display screen is 1119; comparative example 2 is provided with a diffusion particle film on the light-emitting side of the first display screen, and the contrast of the first display screen provided with the diffusion particle film is 1026; embodiment 1 provides a second display screen which is not provided with a diffusion particle film and is not provided with the uniaxial optical film provided in the embodiment of the present application, and the contrast of the second display screen is 1500; embodiment 2 is provided with the uniaxial optical film provided in the embodiment of the present application on the light-emitting side of the second display screen, and the contrast of the second display screen provided with the uniaxial optical film does not change, and is still 1500, and the extinction ratio is 92.8%.

[0066] As can be seen from the above, setting a diffusion particle film for depolarization on the light-exiting side of the first display screen will cause the contrast of the first display screen to decrease, while setting a uniaxial optical film for depolarization on the light-exiting side of the second display screen has no effect on the contrast of the second display screen, and the extinction ratio can reach 92.8%. Therefore, the uniaxial optical film provided in the embodiment of the present application can achieve a good depolarization effect without having a negative effect on the display, which is beneficial to healthy eye protection.

[0067] In some embodiments, Figure 1 As shown, the display panel 10 includes a display function layer 9 and a polarizing function layer 3 which are stacked, and the uniaxial optical film 1 is located on a side of the polarizing function layer 3 away from the display function layer 9 .

[0068] It can be understood that the light emitted by the display function layer 9 is converted into linear polarized light with the same polarization direction as mentioned above after passing through the polarization function layer 3 .

[0069] It should be noted that the polarizing functional layer 3 and the uniaxial optical film 1 can be integrated into the same polarizer for production. The structure of the polarizing functional layer 3 will be described in detail below.

[0070] In the embodiment of the present application, by controlling the ordinary refractive index no of the uniaxial optical film 1 in the display module 11 to be greater than 1.4, and the absolute value of the difference between the ordinary refractive index no and the extraordinary refractive index ne to be greater than 0.05, in the range of 350nm to 800nm, the linear polarized light of different wavelengths with the same polarization direction emitted by the display panel 10 is mostly converted into circular polarized light or elliptically polarized light with different polarization directions when passing through the uniaxial optical film 1, and these circular polarized light or elliptically polarized light with different polarization directions can form a depolarization effect similar to natural light after mixing, thereby having an eye protection effect. In addition, by controlling the angle between the direction of the ordinary refractive index no and the extraordinary refractive index ne of the uniaxial optical film 1 and the polarization direction of the linear polarized light to be equal, the intensity components of the polarization direction of the linear polarized light in the direction of the ordinary refractive index no and the extraordinary refractive index ne are equal, thereby achieving a better depolarization effect. In addition, by controlling the phase delay of the uniaxial optical film 1 to be greater than or equal to 10000 and less than or equal to 16000, the color shift problem can be effectively improved and the display effect can be improved. Therefore, the uniaxial optical film 1 provided in the present application can be applied to the display module 11 to effectively realize healthy eye protection display and improve the display effect.

[0071] like Figure 6 and Figure 7 As shown, the embodiment of the present application further provides a polarizer 2 used in a display module. The polarizer 2 includes a polarizing function layer 3 and a uniaxial optical film 1 . The uniaxial optical film 1 is located on one side of the polarizing function layer 3 .

[0072] In some embodiments, Figure 6 As shown, the polarizing functional layer 3 includes a substrate layer 4, a compensation film 5 and a polarizing layer 6, the polarizing layer 6 is located between the compensation film 5 and the substrate layer 4, and the uniaxial optical film 1 is located on the side of the substrate layer 4 away from the polarizing layer 6. For example, the uniaxial optical film 1 is adhered to the side of the substrate layer 4 away from the polarizing layer 6 by optical adhesive.

[0073] In other embodiments, Figure 7 As shown, the polarizing functional layer 3 includes a compensation film 5 and a polarizing layer 6. The polarizing layer 6 is located between the compensation film 5 and the uniaxial optical film 1. At this time, the uniaxial optical film 1 can be directly used as the substrate layer in the polarizer 2 without the need for an additional substrate layer.

[0074] In some embodiments, the material of the polarizing layer 6 includes polyvinyl alcohol (PVA), but is not limited thereto.

[0075] In some embodiments, the polarizer 2 further includes an adhesive layer 7 and a release film 8 located on the side of the polarizing functional layer 3 away from the uniaxial optical film 1, and the adhesive layer 7 is located between the polarizing functional layer 3 and the release film 8. It can be understood that when the polarizer 2 is used, the release film 8 is torn off, so that the polarizer 2 is fixedly connected to the display functional layer 9 through the adhesive layer 7.

[0076] In some embodiments, the material of the adhesive layer 7 includes pressure sensitive adhesives (PSA), but is not limited thereto.

[0077] In some embodiments, the polarizer 2 also includes an optical functional layer (not shown in the figure) located on the side of the uniaxial optical film 1 away from the polarizing functional layer 3; the optical functional layer includes any one or more combinations of anti-glare coating, transparent hardened coating, anti-reflective coating, anti-fingerprint coating, and anti-static coating.

[0078] In the embodiment of the present application, the uniaxial optical film 1 can be directly adhered to the substrate layer 4 of the polarizer 2, or it can replace the substrate layer 4 in the polarizer 2, so that the uniaxial optical film 1 is used as a component of the polarizer 2 to achieve depolarization. Therefore, the uniaxial optical film 1 provided in the embodiment of the present application is simple to use and easy to mass produce, and can effectively reduce the production cost while achieving depolarization.

[0079] like Figure 8 As shown, the embodiment of the present application further provides a display device 12 , and the display device 12 includes the display module 11 described in the above embodiment.

[0080] In some embodiments, the display device 12 further includes a frame 13 located outside the display module 11 , and the frame 13 is at least located at the back of the display module 11 .

[0081] In some embodiments, the polarizer 2 located on the light-emitting side of the display panel 10 is called an upper polarizer, and correspondingly, the display panel 10 further includes a lower polarizer located on the side of the display function layer 9 away from the polarizer 2; the display device 12 further includes a backlight module, and the lower polarizer is located between the backlight module and the display function layer 9. It can be understood that, at this time, the display panel 10 is a liquid crystal display panel, and the display function layer 9 is a liquid crystal box.

[0082] Of course, in other embodiments, the display panel 10 in the embodiment of the present application may also be an active light-emitting panel, and the present application does not limit this.

[0083] In the embodiment of the present application, the uniaxial optical film 1 located on the light-emitting side of the display panel 10 has a depolarization effect. The visible light of multiple wavelengths emitted by the display function layer 9 in the display panel 10 is converted into linear polarized light with the same polarization direction after passing through the polarizing function layer 3, and these linear polarized lights of different wavelengths are converted into circular polarized light or elliptically polarized light with different polarization directions after passing through the uniaxial optical film 1, forming a depolarization effect similar to natural light, thereby achieving a healthy eye protection display.

[0084] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0085] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0086] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0087] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display module, characterized in that: The display module comprises a display panel and a uniaxial optical film arranged on a light-emitting side of the display panel, and the light emitted by the display panel toward the uniaxial optical film comprises linearly polarized light with the same polarization direction; In which, the refractive index of the uniaxial optical film includes an ordinary refractive index no and an extraordinary refractive index ne, no>1.4, and |ne-no|>0.05; within a preset visible light wavelength range, when the linearly polarized light of different wavelengths passes through the uniaxial optical film, at least part of the wavelength of the linearly polarized light is converted into circularly polarized light or elliptically polarized light, and the polarization directions of the circularly polarized light or the elliptically polarized light of different wavelengths are different.

2. The display module according to claim 1, characterized in that: The polarization directions of the linearly polarized light have equal intensity components in the directions of the ordinary refractive index no and the extraordinary refractive index ne.

3. The display module according to claim 1, characterized in that: The phase retardation of the uniaxial optical film is greater than or equal to 10,000 and less than or equal to 16,000.

4. The display module according to claim 1, characterized in that: The transmittance of the uniaxial optical film is greater than 90%.

5. The display module according to claim 1, characterized in that: The thickness of the uniaxial optical film is greater than 50 micrometers and less than 500 micrometers.

6. The display module according to any one of claims 1 to 5, characterized in that: The preset visible light wavelength range includes 350 nanometers to 800 nanometers.

7. The display module according to any one of claims 1 to 5, characterized in that: The material of the uniaxial optical film is selected from liquid crystal material or organic polymer material; The liquid crystal material includes cyanobiphenyl groups; the organic polymer material includes at least one of a polystyrene-based composite material, an organic polymer mixed material containing polystyrene, polyimide polycarbonate, polyethylene terephthalate and epoxy resin.

8. The display module according to claim 7, characterized in that: When the material of the uniaxial optical film is selected from the liquid crystal material, 0.1≤|ne-no|≤0.3, and the thickness of the uniaxial optical film is greater than 50 micrometers and less than or equal to 100 micrometers.

9. The display module according to claim 1, characterized in that: The display panel comprises a display function layer and a polarizing function layer which are stacked, and the uniaxial optical film is located on a side of the polarizing function layer away from the display function layer.

10. A display device, characterized in that: Comprising a display module as described in any one of claims 1 to 9.

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