Display module and display device

Abstract

The application discloses a display module and a display device, and belongs to the technical field of display. The display module comprises a display panel, a peep-proof film and a liquid crystal grating film. The peep-proof film is arranged on the light-emitting side of the display panel; the liquid crystal grating film is arranged on the light-emitting side of the peep-proof film away from the display panel, comprises a lens layer and a first liquid crystal layer, the lens layer is located between the first liquid crystal layer and the peep-proof film, and the lens layer comprises a plurality of columnar lenses. The application can thin the thickness of the display module and realize the design of an ultrathin display module.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display module and a display panel. Background Technology

[0002] In 3D LCD display modules, thicker padding glass is usually required to increase the viewing distance, which increases the thickness of the display module and makes it impossible to reduce the thickness of the display module, thus making it impossible to design an ultra-thin display module.

[0003] Therefore, it is necessary to propose a new technical solution to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this application is to provide a display module and display device that can reduce the thickness of the display module and achieve the design of an ultra-thin display module.

[0005] To solve the above problems, the technical solution of this application is as follows: In a first aspect, this application proposes a display module, comprising: Display panel; A privacy screen protector is provided on the light-emitting side of the display panel; and A liquid crystal grating film is disposed on the light-emitting side of the privacy film away from the display panel, and includes a lens layer and a first liquid crystal layer. The lens layer is located between the first liquid crystal layer and the privacy film, and the lens layer includes a plurality of cylindrical lenses.

[0006] In one embodiment of this application, the privacy film includes a plurality of spaced-apart light-blocking portions; In the thickness direction of the display module, the portion between two adjacent cylindrical lenses overlaps with the light-shielding portion.

[0007] In one embodiment of this application, the privacy film includes a separating layer, in which spaced filling spaces are formed, and an electrophoretic liquid is disposed in the filling spaces. The electrophoretic liquid includes light-shielding particles, and the filling spaces and the electrophoretic liquid form the light-shielding portion. The portion between two adjacent cylindrical lenses projects onto the separator layer in the orthographic projection within the filling space.

[0008] In one embodiment of this application, the separating layer includes a plurality of light-transmitting portions, and the filling space is formed between two adjacent light-transmitting portions. In the thickness direction of the display module, one of the cylindrical lenses overlaps with at least one of the light-transmitting portions.

[0009] In one embodiment of this application, the width of the light-transmitting portion near the lens layer is greater than the width of the light-transmitting portion away from the lens layer; The width of the filling space on the side closer to the lens layer is smaller than the width of the filling space on the side farther away from the lens layer.

[0010] In one embodiment of this application, the width of the light-transmitting portion gradually decreases from the side closer to the lens layer toward the side farther from the lens layer; The width of the filling space gradually increases from the side closer to the lens layer toward the side farther away from the lens layer.

[0011] In one embodiment of this application, a plurality of cylindrical lenses are arranged along a first direction, and the edges of two adjacent cylindrical lenses are in direct contact. The plurality of light-transmitting portions are arranged along the first direction, and the side of two adjacent light-transmitting portions near the lens layer is in direct contact. The width of one of the cylindrical lenses is equal to the width of N of the light-transmitting portions on the side closest to the lens layer, where N is a positive integer and N is less than or equal to 7.

[0012] In one embodiment of this application, the privacy film further includes: The first electrode layer is located between the separator layer and the display panel; The second electrode layer is located between the separator layer and the lens layer, and the second electrode layer is disposed opposite to the first electrode layer. In the sharing mode, the light-blocking particles are deposited on the side of the filling space near the lens layer; In privacy mode, the light-blocking particles are dispersed within the filling space.

[0013] In one embodiment of this application, the liquid crystal grating film further includes: The third electrode layer is located between the second electrode layer and the first liquid crystal layer; The fourth electrode layer is located on the side of the first liquid crystal layer away from the lens layer, and the third electrode layer is disposed opposite to the fourth electrode layer; The display module also includes: A first substrate is disposed on the light-emitting side of the display panel, and a first electrode layer is disposed on the first substrate; A second substrate, wherein the second electrode layer is disposed on the side of the second substrate closer to the display panel, and the third electrode layer is disposed on the side of the second substrate away from the display panel; and The third substrate is disposed on the side of the first liquid crystal layer away from the display panel, and the fourth electrode layer is disposed on the side of the third substrate close to the display panel.

[0014] Secondly, this application proposes a display device, including a display module, the display module comprising: Display panel; A privacy screen protector is provided on the light-emitting side of the display panel; and A liquid crystal grating film is disposed on the light-emitting side of the privacy film away from the display panel, and includes a lens layer and a first liquid crystal layer. The lens layer is located between the first liquid crystal layer and the privacy film, and the lens layer includes a plurality of cylindrical lenses.

[0015] In the embodiments of this application, by placing the privacy film between the light-emitting side of the display panel and the liquid crystal grating film, the privacy film is an original structure of the display module and has a certain thickness, which increases the viewing distance. Therefore, there is no need to use a thicker pad glass, which can reduce the thickness of the display module and realize the design of an ultra-thin display module. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0018] Figure 1 This is a schematic diagram of an embodiment of the display panel of this application; Figure 2 This is a schematic diagram of an embodiment of the display panel of this application in sharing mode; Figure 3 This is a schematic diagram of an embodiment of the display panel in privacy mode according to this application; Figure 4 This is a schematic diagram of another embodiment of the display panel of this application; Figure 5 This is a schematic diagram of yet another embodiment of the display panel of this application.

[0019] Explanation of reference numerals in the attached figures: 100, Display module; Z, Thickness direction; D1, First direction; 10. Display panel; 20. Privacy film; 21. Light-blocking section; 22. Separator layer; 221. Filling space; 222. Light-blocking particles; 223. Light-transmitting section; 30. Liquid crystal grating film; 31. Lens layer; 311. Cylindrical lens; 32. First liquid crystal layer; 41. First electrode layer; 42. Second electrode layer; 43. Third electrode layer; 44. Fourth electrode layer; 51. First substrate; 52. Second substrate; 53. Third substrate. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0021] This application discloses a display device, which can be a tablet computer, e-reader, electronic display screen, laptop computer, mobile phone, augmented reality (AR) / virtual reality (VR) device, media player, wearable device, digital camera, car navigation system, etc. The display device includes a display module 100.

[0022] Please see Figure 1 This application proposes a display module 100, including a display panel 10, a privacy film 20, and a liquid crystal raster film 30.

[0023] The privacy film 20 is located on the light-emitting side of the display panel 10.

[0024] The liquid crystal grating film 30 is disposed on the light-emitting side of the privacy film 20 away from the display panel 10. The liquid crystal grating film 30 includes a lens layer 31 and a first liquid crystal layer 32. The lens layer 31 is located between the first liquid crystal layer 32 and the privacy film 20, and the lens layer 31 includes a plurality of cylindrical lenses 311.

[0025] In the embodiments of this application, by placing the privacy film 20 between the light-emitting side of the display panel 10 and the liquid crystal grating film 30, the privacy film 20 is an original structure of the display module 100 and has a certain thickness, which plays a role in increasing the viewing distance. Therefore, it is not necessary to use a thicker pad glass, and the thickness of the display module 100 can be reduced, thus realizing the design of an ultra-thin display module 100.

[0026] Optionally, the display panel 10 is a liquid crystal display panel 10. The display panel 10 includes an opposing substrate and an array substrate disposed opposite each other. The display panel 10 also includes a second liquid crystal layer located between the opposing substrate and the array substrate. An electric field is formed between the array substrate and the opposing substrate to control the deflection of the liquid crystal molecules in the second liquid crystal layer.

[0027] Optionally, the display device also includes a backlight module. The backlight module is located on the side of the display panel 10 away from the liquid crystal raster film 30. The light-emitting side of the backlight module is positioned facing the display panel 10.

[0028] Optionally, the display panel 10 further includes a first polarizer and a second polarizer. The first polarizer is disposed on the side of the display panel 10 near the backlight module, and the second grating is disposed on the side of the display panel 10 near the liquid crystal grating film 30. The first grating and the second grating are linear polarizers.

[0029] Optionally, the privacy film 20 includes a plurality of spaced-apart light-blocking portions 21.

[0030] In the thickness direction Z of the display module 100, the portion between two adjacent cylindrical lenses 311 overlaps with the light-shielding portion 21.

[0031] In this embodiment, due to insufficient alignment of the liquid crystal on the structural surface and the design of the cylindrical lens 311, severe light leakage occurs between two adjacent cylindrical lenses 311, increasing three-dimensional crosstalk and affecting the three-dimensional display effect. Therefore, this embodiment uses the light-shielding part 21 to block the portion between two adjacent cylindrical lenses 311, thereby reducing three-dimensional crosstalk and improving the three-dimensional display effect.

[0032] Optionally, the privacy film 20 includes a partition layer 22. The partition layer 22 has spaced-apart filling spaces 221. An electrophoretic solution is disposed in the filling spaces 221. The electrophoretic solution includes light-blocking particles 222. The filling spaces 221 and the electrophoretic solution form a light-blocking portion 21.

[0033] The orthographic projection of the portion between two adjacent cylindrical lenses 311 onto the separator layer 22 lies within the filling space 221.

[0034] In this embodiment, the light-shielding part 21 is formed from an electrophoretic solution containing light-shielding particles 222 within the filling space 221. The light-shielding part 21 in this embodiment has a privacy-prevention switching function, allowing switching between sharing mode and privacy-prevention mode. Please refer to... Figure 2 In sharing mode, the light-blocking particles 222 within the filling space 221 gather, allowing light emitted from a wide viewing angle to pass through the filling space 221, thereby increasing the light emission ratio from a wide viewing angle and realizing the screen sharing function of the display module 100. Please refer to Figure 3 In privacy mode, the light-blocking particles 222 are suspended within the filling space 221. Multiple light-blocking particles 222 are fully dispersed within the filling space 221, making it difficult for light emitted from a wide viewing angle to pass through the filling space 221, thereby reducing the proportion of light emitted from a wide viewing angle and achieving the privacy function of the display module 100. It should be understood that the light-blocking particles 222 are charged. This embodiment enables the privacy film 20 to switch between privacy mode and sharing mode, optimizing the display effect of the display module 100 in both modes.

[0035] It is important to understand that in privacy mode, the liquid crystal grating film 30 can only achieve two-dimensional display. In sharing mode, the liquid crystal grating film 30 can switch between two-dimensional and three-dimensional display.

[0036] Optionally, the separator layer 22 includes a plurality of light-transmitting portions 223. A filling space 221 is formed between two adjacent light-transmitting portions 223. In the thickness direction Z of the display module 100, a cylindrical lens 311 overlaps with at least one light-transmitting portion 223.

[0037] In this embodiment, the separator layer 22 is formed of a light-transmitting organic material. After coating the separator layer 22 with the material, multiple filling spaces 221 are formed in the separator layer 22 by imprinting, and the portion between two adjacent filling spaces 221 is a light-transmitting portion 223. It should be understood that imprinting is a physical transfer or printing method. By injecting electrophoretic liquid into the filling spaces 221 between two adjacent light-transmitting portions 223, a light-shielding portion 21 is formed. In this embodiment, a cylindrical lens 311 can overlap with one light-transmitting portion 223 or multiple light-transmitting portions 223, as long as the connection between two adjacent cylindrical lenses 311 overlaps with the light-shielding portion 21 between two adjacent light-transmitting portions 223, in order to reduce three-dimensional crosstalk and thus improve the display effect.

[0038] Optionally, the privacy film 20 also includes a first electrode layer 41 and a second electrode layer 42.

[0039] The first electrode layer 41 is located between the separator layer 22 and the display panel 10.

[0040] The second electrode layer 42 is located between the separator layer 22 and the lens layer 31. The second electrode layer 42 is disposed opposite to the first electrode layer 41.

[0041] In the sharing mode, light-blocking particles 222 are deposited on the side of the filling space 221 near the lens layer 31.

[0042] In privacy mode, light-blocking particles 222 are dispersed within the filling space 221.

[0043] In this embodiment, both the first electrode layer 41 and the second electrode layer 42 are transparent electrodes, and the material of the transparent electrodes can be indium tin oxide.

[0044] Please see Figure 2In the sharing mode, the second electrode layer 42 is energized. Since the second electrode layer 42 is located between the separator layer 22 and the lens layer 31, the charged light-blocking particles 222 will gather on one side of the second electrode layer 42 and be deposited on the side of the filling space 221 near the lens layer 31. At this time, light with a wide viewing angle can pass through the part of the filling space 221 where there are no light-blocking particles 222, thereby improving the light output ratio of the wide viewing angle and realizing the screen sharing function of the display module 100.

[0045] Please see Figure 3 In the privacy mode, an alternating current is continuously applied to the first electrode layer 41 and the second electrode layer 42, so that the charged light-blocking particles 222 in the electrophoretic solution are suspended in the filling space 221. Multiple light-blocking particles 222 are fully dispersed in the filling space 221, making it difficult for light emitted from a wide viewing angle to pass through the filling space 221, thereby reducing the proportion of light emitted from a wide viewing angle and realizing the privacy function of the display module 100.

[0046] Optionally, the width of the light-transmitting portion 223 on the side closer to the lens layer 31 is greater than the width of the light-transmitting portion 223 on the side farther from the lens layer 31.

[0047] The width of the filling space 221 on the side closer to the lens layer 31 is smaller than the width of the filling space 221 on the side farther away from the lens layer 31.

[0048] In the sharing mode, charged particles are deposited on the side of the filling space 221 closest to the lens layer 31. Reducing the width of the side of the filling space 221 closest to the lens layer 31 creates a narrower top and wider bottom structure, which facilitates the deposition of light-shielding particles 222 in the electrophoretic solution within this narrow space. This forms a more concentrated light-shielding area, reducing the obstruction of light passing through the deposition area of ​​the light-shielding particles 222 by the large viewing angle light. This allows more large viewing angle light to pass through the privacy film 20 in the sharing mode, thereby increasing the light emission ratio of large viewing angle light and realizing the screen sharing function of the display module 100. Therefore, the width of the side of the filling space 221 closest to the lens layer 31 is relatively small.

[0049] In privacy mode, it is necessary to reduce the proportion of light emitted from wide viewing angles. Therefore, the width of the side of the filling space 221 away from the lens layer 31 is set relatively large. Since multiple light-blocking particles 222 are fully dispersed within the filling space 221 in privacy mode, these particles also fill the side of the filling space 221 away from the lens layer 31. The relatively large width of the side of the filling space 221 away from the lens layer 31 allows the light-blocking particles 222 located thereto reduce the emission of light from wide viewing angles, thereby reducing the proportion of light emitted from wide viewing angles and achieving the privacy function of the display module 100.

[0050] Optionally, the width of the light-transmitting portion 223 gradually decreases from the side closer to the lens layer 31 toward the side farther away from the lens layer 31.

[0051] The width of the filling space 221 gradually increases from the side closer to the lens layer 31 toward the side farther away from the lens layer 31.

[0052] In this embodiment, since the width of the filling space 221 gradually increases from the side closer to the lens layer 31 to the side farther away from the lens layer 31, the light-blocking particles 222 can effectively block the portion between two adjacent cylindrical lenses 311 in both the sharing mode and the privacy mode, thereby reducing three-dimensional crosstalk and improving the three-dimensional display effect. At the same time, it also facilitates the formation of the filling space 221 during the imprinting process, improving the production efficiency of the display module 100.

[0053] Optionally, multiple cylindrical lenses 311 are arranged along the first direction D1, with the edges of two adjacent cylindrical lenses 311 in direct contact.

[0054] Multiple light-transmitting portions 223 are arranged along the first direction D1, and two adjacent light-transmitting portions 223 are in direct contact on the side closest to the lens layer 31.

[0055] The width of a cylindrical lens 311 is equal to the width of N light-transmitting parts 223 on the side near the lens layer 31, where N is a positive integer and N is less than or equal to 7.

[0056] In this embodiment, the edges of two adjacent cylindrical lenses 311 are in direct contact, which can reduce the area ratio of the part between the two adjacent cylindrical lenses 311 in the entire lens layer 31, thereby reducing the area with severe three-dimensional crosstalk in the lens layer 31 and improving the three-dimensional display effect.

[0057] In this embodiment, the sides of two adjacent light-transmitting portions 223 closest to the lens layer 31 are in direct contact. This reduces the obstruction of light emitted from the light-blocking particles 222 in the sharing mode, increasing the emissivity of light from the wide viewing angle and improving the display effect. Since the edges of two adjacent cylindrical lenses 311 are in direct contact, this direct contact between the sides of two adjacent light-transmitting portions 223 closest to the lens layer 31 also effectively blocks the portion between the two adjacent cylindrical lenses 311, reducing three-dimensional crosstalk and improving the three-dimensional display effect.

[0058] In this embodiment, when the width of a cylindrical lens 311 is equal to the width of N light-transmitting portions 223 near the lens layer 31, the edge of each cylindrical lens 311 can overlap with the side of a filling space 221 near the lens layer 31, thereby allowing the areas in the lens layer 31 with severe three-dimensional crosstalk to be blocked by the light-blocking particles 222, improving the three-dimensional display effect.

[0059] In this embodiment, the width of each light-transmitting portion 223 on the side near the lens layer 31 is in the range of 40 micrometers to 50 micrometers. The width of each cylindrical lens 311 on the side near the display panel 10 is in the range of 40 micrometers to 350 micrometers.

[0060] The width of each light-transmitting part 223 on the side closest to the lens layer 31 can be 40 micrometers, 45 micrometers, or 50 micrometers.

[0061] The width of each cylindrical lens 311 on the side closest to the display panel 10 can be 40 micrometers, 50 micrometers, 80 micrometers, 100 micrometers, 120 micrometers, 150 micrometers, 160 micrometers, 200 micrometers, 240 micrometers, 250 micrometers, 280 micrometers, 300 micrometers, 350 micrometers, etc.

[0062] Please see Figure 4 Optionally, the liquid crystal grating film 30 further includes a third electrode layer 43 and a fourth electrode layer 44.

[0063] The third electrode layer 43 is located between the second electrode layer 42 and the first liquid crystal layer 32.

[0064] The fourth electrode layer 44 is located on the side of the first liquid crystal layer 32 away from the lens layer 31. The third electrode layer 43 is disposed opposite to the fourth electrode layer 44.

[0065] In 3D display, alternating current needs to be supplied to the third electrode layer 43 and the fourth electrode layer 44. In 2D display, the third electrode layer 43 and the fourth electrode layer 44 are in a de-energized state. This embodiment can realize the switching of the display module 100 between 3D and 2D display.

[0066] Please see Figure 5 Optionally, the display module 100 also includes a first substrate 51, a second substrate 52 and a third substrate 53.

[0067] The first substrate 51 is disposed on the light-emitting side of the display panel 10. The first electrode layer 41 is disposed on the first substrate 51.

[0068] The second electrode layer 42 is disposed on the side of the second substrate 52 closest to the display panel 10. The third electrode layer 43 is disposed on the side of the second substrate 52 furthest from the display panel 10.

[0069] The third substrate 53 is disposed on the side of the first liquid crystal layer 32 away from the display panel 10. The fourth electrode layer 44 is disposed on the side of the third substrate 53 close to the display panel 10.

[0070] In this embodiment, the first substrate 51, the second substrate 52, and the third substrate 53 can be rigid substrates, and their material can be glass. The first substrate 51, the second substrate 52, and the third substrate 53 can be flexible substrates, and their material can be polyimide.

[0071] In this embodiment, the liquid crystal grating film 30 and the privacy film 20 share the second substrate 52, so that the second electrode layer 42 and the third electrode layer 43 are respectively disposed on both sides of the second substrate 52, reducing the design of one substrate layer, thereby reducing the thickness of the display module 100 and realizing the design of an ultra-thin display module 100.

[0072] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0073] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0074] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0075] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display module, characterized in that, include: Display panel; A privacy screen protector is provided on the light-emitting side of the display panel; as well as A liquid crystal grating film is disposed on the light-emitting side of the privacy film away from the display panel, and includes a lens layer and a first liquid crystal layer. The lens layer is located between the first liquid crystal layer and the privacy film, and the lens layer includes a plurality of cylindrical lenses.

2. The display module as described in claim 1, characterized in that, The privacy film includes multiple light-blocking portions spaced apart; In the thickness direction of the display module, the portion between two adjacent cylindrical lenses overlaps with the light-shielding portion.

3. The display module as described in claim 2, characterized in that, The privacy film includes a separating layer, in which spaced filling spaces are formed, and an electrophoretic liquid is disposed in the filling spaces. The electrophoretic liquid includes light-blocking particles, and the filling spaces and the electrophoretic liquid form the light-blocking portion. The portion between two adjacent cylindrical lenses projects onto the separator layer in the orthographic projection within the filling space.

4. The display module as described in claim 3, characterized in that, The separating layer includes multiple light-transmitting portions, and the filling space is formed between two adjacent light-transmitting portions. In the thickness direction of the display module, one of the cylindrical lenses overlaps with at least one of the light-transmitting portions.

5. The display module as described in claim 4, characterized in that, The width of the light-transmitting portion on the side closer to the lens layer is greater than the width of the light-transmitting portion on the side farther from the lens layer; The width of the filling space on the side closer to the lens layer is smaller than the width of the filling space on the side farther away from the lens layer.

6. The display module as described in claim 5, characterized in that, The width of the light-transmitting portion gradually decreases from the side closer to the lens layer toward the side farther away from the lens layer; The width of the filling space gradually increases from the side closer to the lens layer toward the side farther away from the lens layer.

7. The display module as described in claim 5, characterized in that, The plurality of cylindrical lenses are arranged along a first direction, with the edges of two adjacent cylindrical lenses in direct contact. The plurality of light-transmitting portions are arranged along the first direction, and the side of two adjacent light-transmitting portions near the lens layer is in direct contact. The width of one of the cylindrical lenses is equal to the width of N of the light-transmitting portions on the side closest to the lens layer, where N is a positive integer and N is less than or equal to 7.

8. The display module as described in claim 5, characterized in that, The privacy film also includes: The first electrode layer is located between the separator layer and the display panel; The second electrode layer is located between the separator layer and the lens layer, and the second electrode layer is disposed opposite to the first electrode layer. In the sharing mode, the light-blocking particles are deposited on the side of the filling space near the lens layer; In privacy mode, the light-blocking particles are dispersed within the filling space.

9. The display module as described in claim 7, characterized in that, The liquid crystal grating film further includes: The third electrode layer is located between the second electrode layer and the first liquid crystal layer; The fourth electrode layer is located on the side of the first liquid crystal layer away from the lens layer, and the third electrode layer is disposed opposite to the fourth electrode layer; The display module also includes: A first substrate is disposed on the light-emitting side of the display panel, and a first electrode layer is disposed on the first substrate; A second substrate, wherein the second electrode layer is disposed on the side of the second substrate closer to the display panel, and the third electrode layer is disposed on the side of the second substrate away from the display panel; and The third substrate is disposed on the side of the first liquid crystal layer away from the display panel, and the fourth electrode layer is disposed on the side of the third substrate close to the display panel.

10. A display device, characterized in that, Includes the display module as described in any one of claims 1-9.

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