Display module and display device

Abstract

The utility model provides a display module and a display device, the display module comprises a display panel and a polarization adjustment layer, the polarization adjustment layer is arranged on the light-emitting side of the display panel, the polarization adjustment layer comprises a plurality of liquid crystal molecules, and the plurality of liquid crystal molecules have different orientation directions in different areas, so that the liquid crystal molecules are more uniform in orientation. Incident light has different optical paths after passing through different positions of the polarization adjustment layer, so that the incident light has different polarization states corresponding to the different positions of the polarization adjustment layer, the characteristic shown by the incident light is close to that of natural light, and stimulation and potential damage to human eyes are reduced.

Description

Technical Field

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

[0002] In today's display technology, healthy display has become the focus of people's attention, because the display screen is not only used to display information, but also carries functions such as communication, video, payment and entertainment. Especially in the context of eye health, low blue light, adaptive correction of ambient light brightness and anti-screen flicker technology have become hot topics. However, the impact of the polarization state of light on the human eye cannot be ignored.

[0003] Early LCD screens used linearly polarized light, which easily led to uneven brightness and contrast when viewed at specific angles. With the development of technology, circularly polarized and elliptically polarized light are superior to linearly polarized light in terms of comfort; however, elliptically polarized light still exhibits the characteristics of linear polarization at different times, and the intensity of each polarization direction is also different. Long-term use may cause potential damage to the human retina. Utility Model Content

[0004] The embodiments of the present invention provide a display module and a display device to alleviate the deficiencies in the related art.

[0005] To achieve the above functions, the technical solutions provided by the embodiments of the present invention are as follows:

[0006] The present invention provides a display module, comprising:

[0007] Display panel;

[0008] The polarization adjustment layer is arranged on the light emitting side of the display panel, and the polarization adjustment layer includes a plurality of liquid crystal molecules, and the plurality of liquid crystal molecules have different alignment directions in different regions.

[0009] Optionally, in one embodiment, the polarization adjustment layer includes:

[0010] a first substrate;

[0011] a second substrate, arranged opposite to the first substrate;

[0012] an alignment layer, disposed on a side of the first substrate close to the second substrate;

[0013] The liquid crystal molecules are arranged between the alignment layer and the second substrate, the alignment layer includes a plurality of alignment parts, and the alignment directions of adjacent alignment parts are different.

[0014] Optionally, in one embodiment, the polarization adjustment layer further includes a liquid crystal portion, the liquid crystal portion is provided on a side of the first substrate close to the second substrate, and the liquid crystal portion includes a plurality of liquid crystal molecules;

[0015] The liquid crystal section includes a plurality of liquid crystal sub-sections, one liquid crystal sub-section is arranged corresponding to one orientation section, the liquid crystal molecules of each liquid crystal sub-section have the same orientation direction, and the liquid crystal molecules of adjacent liquid crystal sub-sections have different orientation directions.

[0016] Optionally, in one embodiment, the liquid crystal molecules include a long-axis refractive index and a short-axis refractive index;

[0017] Among them, in any of the liquid crystal parts, the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules is the same; in adjacent liquid crystal parts, the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules is different.

[0018] Optionally, in one embodiment, the polarization adjustment layer includes a polarization adjustment portion, the polarization adjustment portion includes the liquid crystal molecules, and the thickness of the polarization adjustment portion gradually increases or decreases along the first direction;

[0019] Wherein, the first direction is parallel to the light emitting surface of the display panel.

[0020] Optionally, in one embodiment, the polarization adjustment layer includes a first polarization adjustment portion and a second polarization adjustment portion, the second polarization adjustment portion is located on a side of the first polarization adjustment portion away from the display panel, and at least one of the first polarization adjustment portion and the second polarization adjustment portion includes the liquid crystal molecules;

[0021] There is a contact surface between the second polarization adjustment part and the first polarization adjustment part, and the first polarization adjustment part and the second polarization adjustment part are symmetrically arranged about the center of the contact surface.

[0022] Optionally, in one embodiment, the first polarization adjustment unit and the second polarization adjustment unit both include the liquid crystal molecules;

[0023] The difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules in the first polarization adjustment part is different from the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules in the second polarization adjustment part.

[0024] Optionally, in one embodiment, the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules is greater than or equal to 0.1 and less than or equal to 0.5.

[0025] Optionally, in one embodiment, the polarization adjustment layer includes a first substrate and a second substrate that are arranged opposite to each other, and a liquid crystal portion located between the first substrate and the second substrate, wherein the liquid crystal portion includes the liquid crystal molecules;

[0026] Wherein, the thickness of the liquid crystal portion is greater than or equal to 1 micrometer and less than or equal to 100 micrometers.

[0027] An embodiment of the utility model further provides a display device, which includes a terminal body and any one of the display modules described above, wherein the terminal body and the display module are combined into one body.

[0028] Beneficial effects of the embodiments of the utility model: The embodiments of the utility model provide a display module and a display device, wherein the display module includes a display panel and a polarization adjustment layer, wherein the polarization adjustment layer is arranged on the light-emitting side of the display panel, and the polarization adjustment layer includes a plurality of liquid crystal molecules. By arranging the plurality of liquid crystal molecules to have different orientation directions in different regions, the incident light will have different optical path lengths after passing through different positions of the polarization adjustment layer, so that the linear polarized light forms different polarization states at different positions after passing through the polarization adjustment layer with different liquid crystal molecule orientations, and the characteristics exhibited are close to natural light, thereby reducing stimulation and potential damage to the human eye. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of the first structure of the display module provided by the embodiment of the utility model;

[0031] Figure 2 A schematic diagram of a first structure of a polarization adjustment layer provided by an embodiment of the utility model;

[0032] Figure 3 A schematic diagram of a second structure of a polarization adjustment layer provided by an embodiment of the utility model;

[0033] Figure 4 A top view of an alignment layer provided in an embodiment of the utility model;

[0034] Figure 5 A curve relationship diagram of the polarization angle and transmittance of the outgoing light after passing through the polarization adjustment layer provided by the embodiment of the utility model;

[0035] Figure 6 A third structural schematic diagram of the polarization adjustment layer provided by an embodiment of the utility model;

[0036] Figure 7 A curve diagram showing the relationship between the thickness of the first polarization adjustment portion provided by the present invention and the phase difference of the emitted light;

[0037] Figure 8 A schematic diagram of a fourth structure of a polarization adjustment layer provided by an embodiment of the utility model;

[0038] Fig. 9 A second structural schematic diagram of a display module provided by an embodiment of the utility model;

[0039] Fig.10 A schematic diagram of the structure of a display device provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the actual use or working mode of the device, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only, and the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The disclosure below provides many different embodiments for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention provides various specific examples of processes and materials, but those skilled in the art can recognize the application of other processes and / or the use of other materials.

[0044] It should be noted that early LCD screens used linearly polarized light, which easily led to uneven brightness and contrast when viewed at specific angles. With the development of technology, circularly polarized and elliptically polarized light are superior to linearly polarized light in terms of comfort; however, elliptically polarized light still exhibits the characteristics of linear polarization at different times, and the intensity of each polarization direction is also different. Long-term use may cause potential damage to the human retina.

[0045] The embodiments of the present invention provide a display module and a display device, which are described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0046] Please combine Figure 1 and Figure 2 ;in, Figure 1 A schematic diagram of the first structure of the display module provided by the embodiment of the utility model; Figure 2 This is a schematic diagram of the first structure of the polarization adjustment layer provided in an embodiment of the utility model.

[0047] In one embodiment, the display module 1 includes a display panel 10, a first polarizing layer 20, a second polarizing layer 30 and a backlight module 40; wherein the display panel 10 can be a liquid crystal display panel 10 (Liquid Crystal Display, LCD), the first polarizing layer 20 is arranged on the backlight side of the display panel 10, the second polarizing layer 30 is arranged on the light emitting side of the display panel 10, and the backlight module 40 is arranged on the side of the first polarizing layer 20 away from the display panel 10, and the brightness display of the display panel 10 is realized by the light source provided by the backlight module 40.

[0048] The display panel 10 includes a first substrate 11 and a second substrate 12 that are arranged opposite to each other, and a liquid crystal layer 13 located between the first substrate 11 and the second substrate 12; wherein the first substrate 11 and the second substrate 12 are sealed to form a liquid crystal box to accommodate the liquid crystal layer 13; the first substrate 11 can be an array substrate, the first substrate 11 includes a first electrode (not shown in the figure), the second substrate 12 can be a color film substrate, the second substrate 12 includes a second electrode (not shown in the figure), and the liquid crystal layer 13 includes a plurality of liquid crystal molecules; wherein, when displaying an image, the first electrode and the second electrode apply an electric field to the liquid crystal layer 13, and change the polarization direction of the light from the backlight module 40 by controlling the twisting of the liquid crystal molecules in the liquid crystal layer 13, so as to control the light intensity after the light is allowed to pass through the liquid crystal box, thereby displaying the corresponding image.

[0049] The display module 1 also includes a polarization adjustment layer 50, which is arranged on a side of the second polarizing layer 30 away from the display panel 10, and the polarization adjustment layer 50 includes a plurality of liquid crystal molecules 501, and the plurality of liquid crystal molecules 501 have different orientation directions in different regions; specifically, from a macroscopic point of view, the liquid crystal molecules 501 of the entire polarization adjustment layer 50 exhibit a uniform distribution characteristic, and from a microscopic point of view, the orientations of the liquid crystal molecules 501 in different local regions of the polarization adjustment layer 50 will be different.

[0050] It should be noted that the second polarizing layer 30 is generally used to convert the non-polarized light emitted by the backlight module 40 into linearly polarized light, thereby providing uniform incident light for the display panel 10; wherein, the characteristic of linearly polarized light is that the light wave vibrates in a specific direction, and this characteristic may cause eye fatigue when viewing for a long time.

[0051] It can be understood that in this embodiment, the polarization adjustment layer 50 is provided to include a plurality of liquid crystal molecules 501, and the plurality of liquid crystal molecules 501 have different orientation directions in different regions, so that the propagation speed of the linear polarized light passing through different places of the polarization adjustment layer 50 will be different, resulting in different optical path lengths of the linear polarized light after passing through different positions of the polarization adjustment layer 50, and further, the linear polarized light forms different polarization states at different positions after passing through the polarization adjustment layer 50 with different orientations of the liquid crystal molecules 501, and the characteristics exhibited are close to natural light, reducing stimulation and potential damage to the human eye.

[0052] Please continue to combine Figure 1 and Figure 2In one embodiment, the polarization adjustment layer 50 includes a first substrate 51 and a second substrate 52 that are arranged opposite to each other, and a liquid crystal portion 53 located between the first substrate 51 and the second substrate 52, and the liquid crystal portion 53 includes a plurality of liquid crystal molecules 501.

[0053] The materials of the first substrate 51 and the second substrate 52 include but are not limited to transparent materials such as polyvinyl butyral (PVB), polycarbonate (PC) and polymethyl methacrylate (PMMA) to ensure that the light emitted by the display panel 10 can pass through; the liquid crystal portion 53 is located between the first substrate 51 and the second substrate 52, and the first substrate 51 and the second substrate 52 are sealed to form a liquid crystal box structure to accommodate the liquid crystal portion 53; wherein, after the incident light passes through the first substrate 51 and the second substrate 52, its polarization direction remains basically unchanged.

[0054] It can be understood that, in this embodiment, the first substrate 51 and the second substrate 52 can be boxed at an appropriate distance to form a closed space, and then the evenly mixed liquid crystal molecules 501 can be poured into the boxed space under vacuum conditions, wherein the vacuum conditions are helpful to expel air and avoid the generation of bubbles; at the same time, under a natural state, the liquid crystal molecules 501 are usually arranged in a disordered (scattered) manner, therefore, after the liquid crystal molecules 501 are poured into the boxed space, the multiple liquid crystal molecules 501 will have different orientation directions in different regions of the polarization adjustment layer 50, without the need for other additional steps, thus saving the process step box cost.

[0055] It should be noted that if Figure 2 As shown, the natural state means that the liquid crystal molecules 501 are arranged in a disordered (scattered) manner. Such a disordered arrangement will not cause the liquid crystal molecules 501 to be arranged in an orderly manner in a certain direction under the action of an electric field.

[0056] Specifically, the liquid crystal molecules 501 may be long and thin molecules, and the liquid crystal molecules 501 have a long-axis refractive index n1 and a short-axis refractive index n2. The difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules 501 is Δn=n1-n2. The incident light of the backlight module 40 passes through the second polarizing layer 30 and then is emitted as linearly polarized light. The phase difference of the linearly polarized light when passing through the polarization adjustment layer 50 can be calculated by the following formula:

[0057] Δφ=(2πdΔn) / λ;

[0058] Wherein, Δφ is the phase difference when the linear polarized light passes through the polarization adjustment layer 50 ; d is the thickness of the polarization adjustment layer 50 ; λ is the wavelength of the linear polarized light; and Δn is the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecule 501 .

[0059] The difference Δn between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules 501 is essentially determined by the chemical structure of the liquid crystal material and will not change due to the change in the arrangement direction of the liquid crystal molecules. However, this embodiment can change the propagation path and phase change of the linearly polarized light in different liquid crystal molecules 501 by controlling the orientation direction of the liquid crystal molecules 501, thereby affecting the overall optical effect. That is, this embodiment can adjust the phase difference of the linearly polarized light when passing through the polarization adjustment layer 50 by controlling the orientation direction of the liquid crystal molecules 501, thereby affecting the change of its polarization state.

[0060] It can be understood that in this embodiment, the plurality of liquid crystal molecules 501 are arranged to have different orientation directions in different regions. The liquid crystal portion 531 includes the liquid crystal molecules 501, and the plurality of liquid crystal molecules 501 have different orientation directions in different regions, so that different phase differences are generated when the linear polarized light passes through different positions of the polarization adjustment layer 50, thereby converting the emitted linear polarized light into light with different polarization directions at each light-emitting position, thereby forming depolarized light close to natural light.

[0061] Please continue to combine Figure 1 and Figure 2 In one embodiment, the thickness of the liquid crystal portion 53 is greater than or equal to 1 micron and less than or equal to 100 microns.

[0062] It can be understood that the optical path is the length of the path that light propagates in a medium multiplied by the refractive index of the medium. In the present embodiment, since the plurality of liquid crystal molecules 501 have different orientation directions in different regions, the linearly polarized light will have different optical paths after passing through different positions of the polarization adjustment layer 50, so that the polarization state of the outgoing light is more uniform as a whole, and light waves with different polarization directions have the opportunity to cancel or mix each other to form depolarized light close to natural light, thereby reducing stimulation and potential damage to the human eye; and, by setting the thickness of the liquid crystal portion 53 to be greater than or equal to 1 micron and less than or equal to 100 microns, the disordered arrangement of the liquid crystal molecules 501 can fully affect the phase and polarization state of the linearly polarized light, and avoid the liquid crystal portion 53 being too thick, resulting in too long a response time and excessive scattering of light, which affects the display effect of the display panel 10.

[0063] Please combine Figure 1 , Figure 3 and Figure 4 ;in, Figure 3 A schematic diagram of a second structure of a polarization adjustment layer provided by an embodiment of the utility model; Figure 4 A top view of an alignment layer provided in an embodiment of the present utility model.

[0064] In one embodiment, the polarization adjustment layer 50 includes a first substrate 51, a second substrate 52, an orientation layer 54 and a plurality of liquid crystal molecules 501, wherein the first substrate 51 and the second substrate 52 are arranged opposite to each other, and the orientation layer 54 is arranged on a side of the first substrate 51 close to the second substrate 52; wherein the liquid crystal molecules 501 are arranged between the orientation layer 54 and the second substrate 52, and the orientation layer 54 includes a plurality of orientation portions 541, and the orientation directions of adjacent orientation portions 541 are different.

[0065] The material of the alignment layer 54 includes but is not limited to polyimide (PI). The alignment layer 54 can be formed by coating a polyimide film on the first substrate 51 and irradiating the polyimide film with ultraviolet light having different polarization directions. The ultraviolet light will induce a photochemical reaction of the polyimide molecules and change the orientation of the polyimide molecules, thereby forming an alignment layer 54 composed of a plurality of alignment parts 541; wherein the alignment directions of adjacent alignment parts 541 are different.

[0066] It can be understood that the liquid crystal molecules 501 are arranged between the orientation layer 54 and the second substrate 52, and the liquid crystal molecules 501 are arranged under the guidance of the orientation layer 54. Since the orientation directions of adjacent orientation parts 541 are different, the plurality of liquid crystal molecules 501 can be controlled to have different orientation directions in different regions, that is, the liquid crystal molecules 501 can be randomly arranged on the orientation layer 54, so that different phase differences are generated when the linear polarized light passes through different positions of the polarization adjustment layer 50, thereby converting the emitted linear polarized light into light with different polarization directions at each light-emitting position (reducing polarized light in a fixed direction), thereby forming depolarized light close to natural light.

[0067] Please continue to combine Figure 3 and Figure 4 In one embodiment, the shape of the orientation layer 54 includes but is not limited to a grid shape, each grid unit is an orientation portion 541, and the orientation directions of adjacent orientation portions 541 are different, wherein the orientation direction of the orientation portion 541 includes but is not limited to one of 0 degrees, 45 degrees, 90 degrees or 135 degrees, and this embodiment does not impose any specific restrictions on this.

[0068] It can be understood that in this embodiment, the alignment layer 54 is formed by arranging the plurality of alignment portions 541 on the first substrate 51 in a certain order or a random order; after the liquid crystal molecules 501 are arranged on the alignment layer 54, the liquid crystal molecules 501 are arranged in the set directions within these grid units. Since the alignment directions of adjacent alignment portions 541 are different, the liquid crystal molecules 501 are randomly arranged on the alignment layer 54, so that different phase differences are generated when the linear polarized light passes through different positions of the polarization adjustment layer 50 (reducing the polarized light in a fixed direction), thereby converting the emitted linear polarized light into light with different polarization directions at each light-emitting position, thereby forming depolarized light close to natural light.

[0069] Please continue to combine Figure 1 , Figure 3 and Figure 4 In one embodiment, the polarization adjustment layer 50 further includes a liquid crystal portion 53, wherein the liquid crystal portion 53 is disposed on a side of the first substrate 51 close to the second substrate 52, and the liquid crystal portion 53 includes a plurality of liquid crystal molecules 501; wherein the liquid crystal portion 53 includes a plurality of liquid crystal portions 531, and one liquid crystal portion 531 is disposed corresponding to one orientation portion 541, and the liquid crystal molecules 501 of each liquid crystal portion 531 have the same orientation direction, and the liquid crystal molecules 501 of adjacent liquid crystal portions 531 have different orientation directions.

[0070] The number of liquid crystal molecules 501 in adjacent liquid crystal sections 531 may be the same or different. The liquid crystal molecules 501 in each liquid crystal section 531 have the same orientation direction, so that the liquid crystal molecules 501 in the same liquid crystal section 531 have consistent optical properties. The liquid crystal molecules 501 in adjacent liquid crystal sections 531 have different orientation directions, so that a variety of optical properties can be formed in the entire liquid crystal section 53.

[0071] It can be understood that, compared with the disordered (scattered) arrangement of the liquid crystal molecules 501 in the liquid crystal section 53 described in the above-mentioned embodiment, the present embodiment achieves more precise orientation control of the liquid crystal molecules 501 by setting the orientation layer 54. The orientation direction of the liquid crystal molecules 501 in each of the liquid crystal sections 531 is determined by the orientation section 541, thereby ensuring the consistency and accuracy of the liquid crystal molecules 501 in each region and avoiding possible orientation errors. At the same time, by setting the liquid crystal molecules 501 in each of the liquid crystal sections 531 to have the same orientation direction, the phase difference generated by the linear polarized light passing through the same liquid crystal section 531 is consistent, thereby improving the uniformity and stability of the display effect.

[0072] Furthermore, in this embodiment, the liquid crystal molecules 501 of adjacent liquid crystal sections 531 are arranged to have different orientation directions, so that the linearly polarized light produces different phase differences when passing through different liquid crystal sections 531, thereby converting the emitted linearly polarized light into light with different polarization directions at each light-emitting position (reducing polarized light in a fixed direction), thereby forming depolarized light close to natural light.

[0073] Please continue to combine Figure 1 , Figure 3 and Figure 4 In one embodiment, in any of the liquid crystal sections 531, the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules 501 is the same; in adjacent liquid crystal sections 53, the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules 501 is different.

[0074] Combined with the formula Δφ=(2πdΔn) / λ, it can be known that when the wavelength λ of the linearly polarized light and the thickness d of the polarization adjustment layer 50 and other conditions are the same, by controlling the difference Δn between the major axis refractive index and the minor axis refractive index of the liquid crystal molecules 501, the phase difference of the linearly polarized light when passing through the polarization adjustment layer 50 can be adjusted, thereby affecting the change of its polarization state.

[0075] It can be understood that, in this embodiment, by setting the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules 501 in any of the liquid crystal sub-sections 531 to be the same, the optical property consistency of the liquid crystal molecules 501 in each of the liquid crystal sub-sections 531 is ensured, and the polarization state and propagation characteristics of the linear polarized light in this area can be more stably controlled; at the same time, by setting the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules 501 in adjacent liquid crystal sections 53 to be different, a variety of optical properties are formed in the liquid crystal section 53, and the phase delay and optical path of the linear polarized light in different regions can be more accurately adjusted, thereby realizing more complex and diversified optical regulation.

[0076] Please combine. Please continue to combine. Figure 1 , Figure 3 , Figure 4 and Figure 5 ;in, Figure 5 This is a curve relationship diagram of the polarization angle and transmittance of the outgoing light after the outgoing light passes through the polarization adjustment layer provided by the embodiment of the utility model.

[0077] In one embodiment, the polarization adjustment layer 50 is arranged on a side of the second polarizing layer 30 away from the display panel 10, the difference between the long-axis refractive index and the short-axis refractive index of the plurality of liquid crystal molecules 501 is the same, and the thickness of the liquid crystal portion 53 can be 1.5 microns; wherein, a polarizer (a device for analyzing polarized light) and a detector (a device for measuring the intensity of light) can be used to measure the transmittance of the outgoing light in different polarization directions; specifically, the polarizer is used to analyze the polarization state of the light after passing through the polarization adjustment layer 50, and the effect of the polarization adjustment layer 50 is evaluated by measuring the transmittance in different polarization directions.

[0078] It is understandable that Figure 5 It can be seen that when the polarization direction of the outgoing light is parallel to the upper polarization axis, the transmittance is 76.65%, when the polarization direction of the outgoing light is perpendicular to the upper polarization axis, the transmittance is about 7%, and the transmittance in other polarization angle directions is between the above two. Therefore, the transmittance has significant differences in different polarization directions, indicating that the polarization adjustment layer 50 can reduce the polarization degree of light, and the greater the thickness of the liquid crystal portion 53, the stronger its ability to reduce the polarization degree of light.

[0079] It should be noted that the "upper polarization axis" proposed in this embodiment refers to the transmission axis of the analyzer used to measure and analyze the polarization state of light, wherein when the polarization direction of light is parallel to the transmission axis of the analyzer, the light can pass through the polarizer to a greater extent.

[0080] Please combine Figure 1 and Figure 6 ;in, Figure 6 This is a schematic diagram of a third structure of the polarization adjustment layer provided in an embodiment of the utility model.

[0081] In one embodiment, the polarization adjustment layer 50 includes a polarization adjustment part 500, the polarization adjustment part 500 includes the liquid crystal molecule 501, and the thickness of the polarization adjustment part 500 gradually increases or decreases along the first direction X; wherein the first direction X is parallel to the light emitting surface of the display panel 10, and the first direction can be Figure 6 The X direction in .

[0082] It can be understood that, in this embodiment, the thickness of the polarization adjustment unit 500 is gradually increased or decreased along the first direction X, so that the thickness of the liquid crystal molecules 501 changes, and then the optical path of the linear polarized light emitted to the polarization adjustment unit 500 changes, thereby generating different phase differences, so as to achieve phase difference adjustment of the linear polarized light incident on different positions of the polarization adjustment layer 50, convert the emitted linear polarized light into light with different polarization directions at each light-emitting position, and then form depolarized light close to natural light, thereby reducing visual fatigue.

[0083] Please continue to combine Figure 1 and Figure 6 In one embodiment, the polarization adjustment layer 50 includes a first polarization adjustment portion 5001 and a second polarization adjustment portion 5002, and at least one of the first polarization adjustment portion 5001 and the second polarization adjustment portion 5002 includes the liquid crystal molecule 501; wherein the second polarization adjustment portion 5002 is located on a side of the first polarization adjustment portion 5001 away from the display panel 10, and a contact surface is provided between the second polarization adjustment portion 5002 and the first polarization adjustment portion 5001, and the first polarization adjustment portion 5001 and the second polarization adjustment portion 5002 are symmetrically arranged about the center of the contact surface.

[0084] Specifically, the thickness of the first polarization adjustment unit 5001 gradually decreases along the first direction X, the first polarization adjustment unit 5001 includes a first sub-substrate 50011 and a liquid crystal molecule 501, the thickness of the second polarization adjustment unit 5002 gradually increases along the first direction X, the second polarization adjustment unit 5002 can be a transparent substrate structure, the side of the first polarization adjustment unit 5001 close to the display panel 10 is parallel to the light emitting surface of the display panel 10, and the side of the second polarization adjustment unit 5002 away from the display panel 10 is parallel to the light emitting surface of the display panel 10.

[0085] The material of the second polarization adjustment unit 5002 and the material of the first sub-substrate 50011 include but are not limited to transparent materials such as polyvinyl butyral (PVB), polycarbonate (PC) and polymethyl methacrylate (PMMA). After the incident light passes through the first sub-substrate 50011 and the second polarization adjustment unit 5002, its polarization direction remains basically unchanged; wherein, the first sub-substrate 50011 and the second polarization adjustment unit 5002 can be sealed to form a liquid crystal box structure to accommodate the liquid crystal molecules 501.

[0086] It can be understood that, in this embodiment, the first polarization adjustment unit 5001 is provided to include the liquid crystal molecules 501, and the thickness of the first polarization adjustment unit 5001 gradually decreases along the first direction X, thereby causing the thickness of the liquid crystal molecules 501 to change, thereby causing the optical path of the linear polarized light emitted to the first polarization adjustment unit 5001 to change, thereby generating different phase differences, and the originally single-direction linear polarized light can be converted into polarized light in multiple directions, so that the polarization direction of the output light is more diversified, thereby being closer to the polarization state of natural light and reducing visual fatigue.

[0087] At the same time, by arranging the first polarization adjustment part 5001 and the second polarization adjustment part 5002 symmetrically about the center of the contact surface, the light can be evenly modulated when passing through the polarization adjustment layer 50, thereby avoiding the phenomenon of local brightness and color unevenness; and it is easier to achieve precise alignment and control during the manufacturing process, reducing processing errors and complexity.

[0088] Furthermore, the second polarization adjustment section 5002 may be a transparent substrate structure, and the second polarization adjustment section 5002 does not include liquid crystal molecules 501, but a change in the thickness of the second polarization adjustment section 5002 will affect the overall optical path length, that is, the thickness of the second polarization adjustment section 5002 gradually increases along the first direction X, which will also cause the optical path length of the linear polarized light emitted to the second polarization adjustment section 5002 to change, and further cause the optical path length of the linear polarized light emitted to the first polarization adjustment section 5001 to change.

[0089] It should be noted that, in this embodiment, the technical solution of the utility model is illustrated by taking the example that the first polarization adjustment part 5001 includes the first sub-substrate 50011 and the liquid crystal molecules 501, and the second polarization adjustment part 5002 is a transparent substrate structure; in another embodiment, the first polarization adjustment part 5001 can be a transparent substrate structure, and the second polarization adjustment part 5002 includes the first sub-substrate 50011 and the liquid crystal molecules 501.

[0090] Please combine Figure 1 , Figure 6 and Figure 7 ;in, Figure 7 The graph is a relationship curve between the thickness of the first polarization adjustment part provided by the utility model and the phase difference of the outgoing light.

[0091] In one embodiment, in the first polarization adjustment unit 5001, the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecule 501 is 0.2; Figure 6 It can be seen that as the thickness of the first polarization adjustment section 5001 gradually decreases along the first direction X, the distance that the linear polarized light propagates in the first polarization adjustment section 5001 gradually decreases, resulting in a reduction in its optical path in the first polarization adjustment section 5001. Therefore, the linear polarized light has different phase difference values ​​corresponding to different positions of the first polarization adjustment section 5001, that is, the same linear polarized light can form different polarization states after passing through different horizontal positions. Therefore, the polarization state changes at different positions can be achieved, achieving an effect similar to natural light and reducing visual fatigue.

[0092] Please combine Figure 1 and Figure 8 ;in, Figure 8This is a schematic diagram of a fourth structure of the polarization adjustment layer provided in an embodiment of the utility model.

[0093] In one embodiment, the first polarization adjustment part 5001 and the second polarization adjustment part 5002 both include the liquid crystal molecules 501; wherein the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules 501 of the first polarization adjustment part 5001 is different from the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules 501 of the second polarization adjustment part 5002.

[0094] Specifically, the thickness of the first polarization adjustment unit 5001 gradually decreases along the first direction X, the first polarization adjustment unit 5001 includes a first sub-substrate 50011 and a second sub-substrate 50012, and liquid crystal molecules 501 located between the first sub-substrate 50011 and the second sub-substrate 50012, and the first sub-substrate 50011 and the second sub-substrate 50012 are sealed to form a liquid crystal box structure to accommodate the liquid crystal molecules 501; the thickness of the second polarization adjustment unit 5002 gradually increases along the first direction X, and the second polarization adjustment unit 5002 is 002 includes a third sub-substrate 50021 and a fourth sub-substrate 50022, and a liquid crystal molecule 501 located between the third sub-substrate 50021 and the fourth sub-substrate 50022, and a liquid crystal box structure is formed by sealing the third sub-substrate 50021 and the fourth sub-substrate 50022 to accommodate the liquid crystal molecule 501; wherein a contact surface is provided between the second polarization adjustment portion 5002 and the first polarization adjustment portion 5001, and the first polarization adjustment portion 5001 and the second polarization adjustment portion 5002 are symmetrically arranged about the center of the contact surface.

[0095] The materials of the first sub-substrate 50011, the second sub-substrate 50012, the third sub-substrate 50021 and the fourth sub-substrate 50022 include but are not limited to transparent materials such as polyvinyl butyral (PVB), polycarbonate (PC) and polymethyl methacrylate (PMMA); wherein, after the incident light passes through the first sub-substrate 50011, the second sub-substrate 50012, the third sub-substrate 50021 and the fourth sub-substrate 50022, its polarization direction remains basically unchanged; it should be noted that the third sub-substrate 50021 and the second sub-substrate 50012 can be the same film layer, thereby omitting a layer of transparent substrate, simplifying the structure, and reducing material and manufacturing costs.

[0096] It can be understood that, in this embodiment, the thickness of the first polarization adjustment part 5001 is gradually reduced along the first direction X, and the thickness of the second polarization adjustment part 5002 is gradually increased along the first direction X, so that the incident light passes through the polarization adjustment parts 500 of different thicknesses at different positions of the polarization adjustment layer 50, thereby generating different phase differences, and can convert a single linearly polarized light into light with different polarization directions at each light-emitting position, forming a depolarized light that is closer to natural light; at the same time, the centrally symmetrical structural design enables the linear polarized light to be evenly modulated when passing through the polarization adjustment layer 50, thereby avoiding the phenomenon of local brightness and color unevenness.

[0097] In one embodiment, the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecule 501 is greater than or equal to 0.1 and less than or equal to 0.5. The first polarization adjustment unit 5001 and the second polarization adjustment unit 5002 can modulate the linear polarized light differently, so that the linear polarized light can produce a controllable phase difference when passing through the polarization adjustment units 500 of different thicknesses at different positions, thereby ensuring precise control of the light propagation path and phase state, thereby optimizing the display effect.

[0098] It should be noted that, in the above embodiment, the display module 1 includes a first polarizing layer 20, a display panel 10, a second polarizing layer 30, a backlight module 40 and a polarization adjustment layer 50, wherein the polarization adjustment layer 50 is arranged on the side of the second polarizing layer 30 away from the display panel 10 only for illustration, and this embodiment does not impose any specific restrictions on the structure of the display module 1.

[0099] For example, see Fig. 9 , which is a second structural schematic diagram of the display module provided by an embodiment of the utility model; in one embodiment, the display module 1 includes a display panel 10, a first polarizing layer 20, a backlight module 40 and a polarization adjustment module 60, the first polarizing layer 20 is arranged on the backlight side of the display panel 10, the backlight module 40 is arranged on the side of the first polarizing layer 20 away from the display panel 10, and the polarization adjustment module 60 is arranged on the light emitting side of the display panel 10.

[0100] The polarization adjustment module 60 includes a first protective film 61, a polarizer 62 and a polarization adjustment layer 50 which are stacked; wherein the polarization adjustment layer 50 includes a plurality of liquid crystal molecules 501, and the plurality of liquid crystal molecules 501 have different orientation directions in different regions. The first protective film 61 may be a triacetyl cellulose film (TAC), which is mainly used to protect the polarizer 62 and provide mechanical strength. The polarizer may be made of a polyvinyl alcohol (PVA) film.

[0101] It should be noted that the polarization adjustment layer 50 may be the polarization adjustment layer 50 described in any of the above embodiments, which will not be described repeatedly in this embodiment.

[0102] It can be understood that the polarizing layer is usually composed of two layers of protective films (TAC) sandwiched between a layer of polarizer. In this embodiment, the polarization adjustment module 60 includes a stacked first protective film 61, a polarizer 62 and a polarization adjustment layer 50, thereby integrating the polarization adjustment layer 50 and the existing polarizing layer into one, and omitting a layer of protective film, thereby simplifying the structure and reducing material and manufacturing costs.

[0103] See also Fig.10 , is a schematic diagram of the structure of the display device provided in an embodiment of the utility model.

[0104] This embodiment further provides a display device, which includes a terminal body and a display module, wherein the terminal body and the display module are integrated into one; wherein the display module may be the display module described in any of the above embodiments.

[0105] It can be understood that the display module has been described in detail in the above embodiments and will not be repeated here; the terminal body may include a middle frame, which is combined with the display module as a whole to provide support, fixation and protection for the display module.

[0106] In specific applications, the display device can be at least one of a smart phone, tablet computer, mobile phone, video phone, e-book reader, desktop computer, laptop, netbook, workstation, server, personal digital assistant, portable media player, MP3 player, mobile medical machine, camera, game console, digital camera, car navigation system, electronic billboard, ATM or wearable device, etc., which has a display function.

[0107] 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.

[0108] The above is a detailed introduction to a display module and a display device provided in an embodiment of the present invention. Specific examples are used herein to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present invention. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display module, characterized in that: include: Display panel; The polarization adjustment layer is arranged on the light emitting side of the display panel, and the polarization adjustment layer includes a plurality of liquid crystal molecules, and the plurality of liquid crystal molecules have different alignment directions in different regions.

2. The display module according to claim 1, characterized in that: The polarization adjustment layer comprises: a first substrate; a second substrate, arranged opposite to the first substrate; an alignment layer, disposed on a side of the first substrate close to the second substrate; The liquid crystal molecules are arranged between the alignment layer and the second substrate, the alignment layer includes a plurality of alignment parts, and the alignment directions of adjacent alignment parts are different.

3. The display module according to claim 2, characterized in that: The polarization adjustment layer further includes a liquid crystal portion, the liquid crystal portion is disposed on a side of the first substrate close to the second substrate, and the liquid crystal portion includes a plurality of liquid crystal molecules; The liquid crystal section includes a plurality of liquid crystal sub-sections, one liquid crystal sub-section is arranged corresponding to one orientation section, the liquid crystal molecules of each liquid crystal sub-section have the same orientation direction, and the liquid crystal molecules of adjacent liquid crystal sub-sections have different orientation directions.

4. The display module according to claim 3, characterized in that: The liquid crystal molecules include a long-axis refractive index and a short-axis refractive index; Among them, in any of the liquid crystal parts, the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules is the same; in adjacent liquid crystal parts, the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules is different.

5. The display module according to claim 1, characterized in that: The polarization adjustment layer includes a polarization adjustment part, the polarization adjustment part includes the liquid crystal molecules, and the thickness of the polarization adjustment part gradually increases or decreases along the first direction; Wherein, the first direction is parallel to the light emitting surface of the display panel.

6. The display module according to claim 5, characterized in that: The polarization adjustment layer includes a first polarization adjustment portion and a second polarization adjustment portion, the second polarization adjustment portion is located at a side of the first polarization adjustment portion away from the display panel, and at least one of the first polarization adjustment portion and the second polarization adjustment portion includes the liquid crystal molecules; There is a contact surface between the second polarization adjustment part and the first polarization adjustment part, and the first polarization adjustment part and the second polarization adjustment part are symmetrically arranged about the center of the contact surface.

7. The display module according to claim 6, characterized in that: The first polarization adjustment unit and the second polarization adjustment unit both include the liquid crystal molecules; The difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules in the first polarization adjustment part is different from the difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules in the second polarization adjustment part.

8. The display module according to claim 7, characterized in that: The difference between the long-axis refractive index and the short-axis refractive index of the liquid crystal molecules is greater than or equal to 0.1 and less than or equal to 0.

5.

9. The display module according to claim 1, characterized in that: The polarization adjustment layer includes a first substrate and a second substrate that are arranged opposite to each other, and a liquid crystal portion located between the first substrate and the second substrate, wherein the liquid crystal portion includes the liquid crystal molecules; Wherein, the thickness of the liquid crystal portion is greater than or equal to 1 micrometer and less than or equal to 100 micrometers.

10. A display device, characterized in that: It comprises a terminal body and a display module as claimed in any one of claims 1 to 9, wherein the terminal body and the display module are combined into one body.

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