Light conversion element, backlight module and display device

Abstract

The application relates to a light conversion element, a backlight module and a display device. The light conversion element comprises a containing part, a light transmission part and an electrode assembly. The containing part has a light emitting surface. The light transmission part is arranged in the containing part. The light transmission part has a first light transmission surface and a second light transmission surface with opposite magnetism. The first light transmission surface and the second light transmission surface are respectively configured to change the propagation path of light. The electrode assembly comprises a first electrode and a second electrode with opposite polarity. The first electrode and the second electrode are arranged in a spaced and opposite manner and are respectively located on the containing part. The light conversion element can be switched between a first state and a second state. In the first state, the first electrode attracts the first light transmission surface and makes the first light transmission surface face the light emitting surface, so that the light is diffused and propagated from the light emitting surface. In the second state, the second electrode attracts the second light transmission surface and makes the second light transmission surface face the light emitting surface, so that the light is contracted and propagated from the light emitting surface. The application reduces the loss of light brightness while realizing light conversion.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of view switching, in particular to a light conversion element, a backlight module and a display device. BACKGROUND

[0002] When watching a display screen, the conversion of the viewing angle is usually required, for example, in the privacy mode, only in a narrow viewing angle can the screen content be clearly seen, while in the sharing mode, it has a wider display viewing angle.

[0003] In the prior art, for the conversion of the screen viewing angle, very complex and expensive optical elements are mostly used, such as micro-lens elements and prism structures, etc. Such complex light conversion seriously reduces the display brightness, so that the screen will be dark in any viewing angle, which affects the user's viewing experience.

[0004] Therefore, there is an urgent need for a new type of display screen. SUMMARY

[0005] The present application provides a light conversion element, a backlight module and a display device, which are simple in structure and can reduce the loss of light brightness while realizing light conversion.

[0006] In one aspect, the present application provides a light conversion element, which includes a receiving portion, a light-transmitting portion and an electrode assembly. The receiving portion has an outlight surface. The light-transmitting portion is arranged in the receiving portion. The light-transmitting portion has a first light-transmitting surface and a second light-transmitting surface with opposite magnetic properties. The first light-transmitting surface and the second light-transmitting surface are respectively configured to change the propagation path of light. The electrode assembly includes a first electrode and a second electrode with opposite polarities. The first electrode and the second electrode are arranged in a spaced and opposite manner and are respectively located on the receiving portion. The light conversion element can be switched between a first state and a second state. In the first state, the first electrode attracts the first light-transmitting surface and makes the first light-transmitting surface face the outlight surface, so that the light is diffused and propagated from the outlight surface. In the second state, the second electrode attracts the second light-transmitting surface and makes the second light-transmitting surface face the outlight surface, so that the light is contracted and propagated from the outlight surface.

[0007] In another aspect, the present application provides a backlight module, which includes a backlight source, an optical film layer and a light conversion element as described above. The optical film layer is arranged on the backlight source. The light conversion element is arranged on the side of the optical film layer away from the backlight source.

[0008] In another aspect, the present application provides a display device, which includes a backlight module as described above.

[0009] The light conversion element, the backlight module and the display device provided by the embodiment of the present application, by setting the light-transmitting part and the electrode assembly in the accommodating part, making the first light-transmitting surface and the second light-transmitting surface of the light-transmitting part have different magnetism, using the principle that the electrode assembly and the light-transmitting part attract each other due to different magnetism, making the first light-transmitting surface and the second light-transmitting surface can be alternately attracted by the electrode assembly and refract towards the light, the light-transmitting part as a whole can rotate in the accommodating part, so that the light forms different refraction angles, achieving the effect of light diffusion or contraction. Through the above principle, the light conversion is simple in structure, without going through complex optical elements, and the light also does not need to go through multiple refraction switching, while realizing the view angle conversion, avoiding the attenuation of the light intensity, ensuring the brightness and resolution of the light, having better visual effect, at the same time, the device is simple in structure, avoiding using complex and expensive optical devices, and can complete the light conversion at low cost. BRIEF DESCRIPTION OF DRAWINGS

[0010] The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0011] Figure 1 is a structure schematic diagram of the light conversion element of the embodiment of the present application;

[0012] Figure 2 is a light path direction diagram of the light conversion element of the embodiment of the present application in the first state;

[0013] Figure 3 is a light path direction diagram of the light conversion element of the embodiment of the present application in the second state;

[0014] Figure 4 is a structure schematic diagram of the light-transmitting part of the light conversion element of the embodiment of the present application;

[0015] Figure 5 is a first electrode position arrangement diagram of the light conversion element of the embodiment of the present application;

[0016] Figure 6 is a second electrode position arrangement diagram of the light conversion element of the embodiment of the present application;

[0017] Figure 7 is a structure schematic diagram of a display device of the embodiment of the present application.

[0018] Reference Signs:

[0019] 100 - light conversion element; X - row direction; Y - column direction; Z - thickness direction;

[0020] M - first state; N - second state;

[0021] 1 - accommodating part; 11 - light exit surface;

[0022] 2 - light transmission portion; 21 - first light transmission surface; 22 - second light transmission surface; 23 - end surface; 24 - side surface;

[0023] 25 - first magnetic particle; 26 - second magnetic particle; 27 - short axis edge;

[0024] 3 - electrode assembly; 31 - first electrode; 32 - second electrode;

[0025] 4 - row gap; 41 - first gap; 42 - second gap;

[0026] 5 - reflection portion;

[0027] 10 - backlight; 11 - glass substrate; 12 - thin film transistor; 13 - liquid crystal cell; 14 - color filter.

[0028] In the drawings, the same components have the same reference numerals, and the drawings are not drawn to scale. DETAILED DESCRIPTION

[0029] Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some or all of these specific details. The description of the embodiments is merely illustrative of the present application and is not intended to limit the present application, as is apparent to one of ordinary skill in the art. In the drawings and description below, well-known structures and techniques have not been shown or described in detail in order not to obscure the application. Also, in the following description and in the claims, the terms "include" and "have" should not be interpreted as limiting inclusion of an element or a component by the term merely serves as recognition of existence of an underlying feature. Furthermore, many of the features, structures, or characteristics described in the following description can be combined in any suitable manner to form numerous combinations, and the present application is not limited to the specific combinations set forth herein. Rather, such aspects, structures, or characteristics can be combined in any suitable manner to form numerous combinations, and the present application is not limited to the specific combinations set forth herein.

[0030] The orientation terms appearing in the following description are the directions shown in the drawings, and are not intended to limit the specific structure of the light conversion element, the backlight module and the display device of the present application. In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, or indirectly connected. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In order to better understand the present application, the following will be described in conjunction with Figures 1 to 7 The light conversion element, the backlight module and the display device of the embodiments of the present application will be described in detail.

[0032] Please refer to Figures 1 to 3The embodiment of the present application provides a light conversion element 100, which comprises a containing part 1, a light transmission part 2 and an electrode assembly 3, the containing part 1 has a light emitting surface 11, the light transmission part 2 is arranged in the containing part 1, the light transmission part 2 has a first light transmission surface 21 and a second light transmission surface 22 which are magnetically opposite, the first light transmission surface 21 and the second light transmission surface 22 are respectively configured to change the propagation path of light, the electrode assembly 3 comprises a first electrode 31 and a second electrode 32 which are opposite in polarity, the first electrode 31 and the second electrode 32 are arranged in a spaced and opposite manner and are respectively located on the containing part 1, wherein the light conversion element 100 can be switched between a first state M and a second state N, in the first state M, the first electrode 31 attracts the first light transmission surface 21 and makes the first light transmission surface 21 face the light emitting surface 11, so that the light is diffused and propagated from the light emitting surface 11, in the second state N, the second electrode 32 attracts the second light transmission surface 22 and makes the second light transmission surface 22 face the light emitting surface 11, so that the light is contracted and propagated from the light emitting surface 11.

[0033] When the light conversion element 100 is used, a light source is usually needed to be matched, the light source can be placed on one side of the light conversion element 100 or the bottom of the light conversion element 100, after the light source emits light, the light is processed by the light conversion element 100 and then emitted, so the side of the containing part 1 away from the light source is the light emitting surface 11.

[0034] Optionally, the containing part 1 can adopt a plate-shaped substrate with a thin cavity in the middle, the thin cavity inside the plate-shaped substrate is filled with a fluid matrix, usually a polymer fluid such as a gel matrix, and the thickness of the plate-shaped substrate is generally 2mm.

[0035] Since the light conversion element 100 is arranged in a film layer structure through the containing part 1, optionally, the containing part 1 can be a layered structure, and the specific length and width thereof can be determined according to the actual required light processing range.

[0036] Considering that the light needs to be emitted from the light emitting surface 11 after passing through the containing part 1, the fluid matrix in the containing part 1 needs to be transparent so that the light can pass through.

[0037] The light transmission part 2 is arranged in the containing part 1 and is fixed through the fluid matrix inside the containing part 1, when the light conversion element 100 is not running, the light transmission part 2 is suspended in the fluid matrix, when the light conversion element 100 is running, the light transmission part 2 can rotate in the fluid matrix so that different surfaces of the light transmission part 2 are directed to refract the light.

[0038] Optionally, the light transmission part 2 can be a convex lens with different shapes of light transmission surfaces, considering that the light transmission part 2 is suspended in the fluid matrix, the weight thereof should not be too large, so the light transmission part 2 can adopt a light material such as PC (polycarbonate) plastic material.

[0039] The light-transmitting part 2 has a first light-transmitting surface 21 and a second light-transmitting surface 22, light rays can be refracted through the first light-transmitting surface 21 and the second light-transmitting surface 22, so as to change the propagation path of the light rays, and the angles of refraction of the two surfaces are different.

[0040] Optionally, the angle of refraction of the light rays through the first light-transmitting surface 21 is greater than the angle of refraction of the light rays through the second light-transmitting surface 22, so that the light rays are diffused after being processed through the first light-transmitting surface 21 and the light rays are contracted after being processed through the second light-transmitting surface 22.

[0041] Of course, the light-transmitting part 2 can also be a lens body of other shapes, and the first light-transmitting surface 21 and the second light-transmitting surface 22 have different surface shapes. In this way, the angles of refraction of the light rays through the first light-transmitting surface 21 and the second light-transmitting surface 22 are different, and the propagation path of the light rays can also be changed to form a propagation process of relative contraction and diffusion of the light rays. The specific shape and structure of the light-transmitting part 2 are not specially limited in the present application.

[0042] The first light-transmitting surface 21 and the second light-transmitting surface 22 are arranged to have opposite magnetism, and optionally, one surface is N-pole and the other surface is S-pole, and are matched with the first electrode 31 and the second electrode 32 having opposite polarities. After being powered on, the first electrode 31 can be attracted to the first light-transmitting surface 21, and the second electrode 32 can be attracted to the second light-transmitting surface 22.

[0043] Optionally, the first electrode 31 and the second electrode 32 can be arranged on the opposite surfaces of the accommodating part 1. When the first electrode 31 is turned on, the first light-transmitting surface 21 of the intermediate light-transmitting part 2 is attracted and rotated to face the first electrode 31 to form a first state M. When the second electrode 32 is turned on, the second light-transmitting surface 22 of the intermediate light-transmitting part 2 is attracted and rotated to face the second electrode 32 to form a second state N. The first electrode 31 and the second electrode 32 need to be turned on alternately.

[0044] For switching of the light ray conversion element 100 in the first state M and the second state N, electromagnetic switch mechanisms can be arranged at the first electrode 31 and the second electrode 32 respectively, so as to realize the opening and closing of the first electrode 31 and the second electrode 32.

[0045] The above-mentioned switching is realized by alternately turning on the electrode assembly 3 to realize the light-transmitting part 2 facing the light rays in different directions, and then realizing the conversion of the refraction angle of the light rays. After the electrode assembly 3 is turned on, a magnetic field is generated around the electrode due to electromagnetic induction principle. The different surfaces of the light-transmitting part 2 have different magnetism and are located in the magnetic field. According to the principle of opposite poles attracting each other, the different surfaces of the light-transmitting part 2 face the respective electrodes after the electrode assembly 3 is alternately turned on.

[0046] It should be noted that the application utilizes the principle of magnetic attraction, controls the magnetic field formed around the light-transmitting part 2, utilizes the magnetic force to attract the rotation and hovering of the light-transmitting part 2, so that the surfaces of different shapes of the light-transmitting part 2 are directed towards the light, thereby realizing the relative diffusion and contraction of the light. The way of realizing the light adjustment by utilizing the above-mentioned magnetic field and magnetic force principle is within the protection scope of the application.

[0047] The light-transmitting part 2 and the electrode assembly 3 are arranged in the accommodating part 1, the first light-transmitting surface 21 and the second light-transmitting surface 22 of the light-transmitting part 2 have different magnetism, the first light-transmitting surface 21 and the second light-transmitting surface 22 are alternately attracted by the electrode assembly 3 and refracted towards the light according to the principle that the electrode assembly 3 and the light-transmitting part 2 are attracted to each other in terms of magnetic properties, the light-transmitting part 2 as a whole can rotate in the accommodating part 1, so that the light forms different refraction angles, and the effect of light diffusion or contraction is achieved. The light is converted by the above-mentioned principle, the structure is simple, the light does not need to pass through complex optical elements and multiple refraction switching, the light intensity attenuation is avoided while realizing the view angle conversion, the brightness and resolution of the light are ensured, and better visual effect is achieved.

[0048] As an optional embodiment, please refer to Figures 1 to 3 , the first light-transmitting surface 21 comprises a plane and the second light-transmitting surface 22 comprises a curved surface.

[0049] In this embodiment, the light-transmitting part 2 is taken as a convex lens, the convex lens has a plane and a curved surface, the light is refracted and diffused outward when passing through the plane, and the light is refracted and converged inward when passing through the curved surface.

[0050] When the first light-transmitting surface 21 is a plane, the light is divergent after passing through the first light-transmitting surface 21, thereby expanding the viewing angle; when the second light-transmitting surface 22 is a curved surface, the light is convergent after passing through the second light-transmitting surface 22, thereby narrowing the viewing angle.

[0051] Optionally, the structure of the light-transmitting part 2 can be an elliptical cylinder, the structure of the light-transmitting part 2 is not specially limited in the application, and the structure capable of combining the plane diffraction and the curved surface convergence can be used.

[0052] The light-transmitting part 2 is taken as a convex lens, the convex lens has a plane and a curved surface, the light is refracted and diffused outward when passing through the plane, and the light is refracted and converged inward when passing through the curved surface.

[0053] As an optional embodiment, please refer to Figure 4 , the light-transmitting part 2 is an elliptical cylinder and has two opposite end surfaces 23 and a side surface 24 connected between the two end surfaces 23, the end surface 23 is a plane, the side surface 24 is a curved surface, and the coverage range of the light after passing through the end surface 23 is greater than that after passing through the side surface 24.

[0054] Optionally, the light-transmitting part 2 is arranged as an elliptic cylinder, the elliptic cylinder has two opposite end faces 23 and is planar, that is, the light-transmitting part 2 has two opposite first light-transmitting faces 21, the end faces 23 are elliptical, and light is divergent after passing through the end faces 23 of the elliptic cylinder.

[0055] For the light-transmitting part 2 of the elliptic cylinder structure, the light-transmitting part 2 itself has a surrounding side face 24 connecting the two opposite end faces 23 to form the elliptic cylinder, the side face 24 is an arc-shaped closed curved surface and serves as a second light-transmitting face 22, and light is convergent after passing through the side face 24 of the elliptic cylinder.

[0056] Optionally, the side face 24 and the end face 23 of the elliptic cylinder are arranged as two faces with opposite magnetism, so that the side face 24 and the end face 23 can be oriented to light in different magnetic fields, and the two faces with opposite magnetism are connected by attraction to form the elliptic cylinder, which has better structural stability.

[0057] The elliptic cylinder has a major axis and a minor axis perpendicular to each other, and optionally, the light-transmitting part 2 of the elliptic cylinder can rotate along the major axis or the minor axis of the light-transmitting part 2 itself when the electrode assembly 3 is alternately turned on according to different positions of the electrode assembly 3.

[0058] Optionally, the specific size of the elliptic cylinder can be determined according to the size of the accommodating part 1 and the actual required light coverage range, and generally, the major axis of the elliptic cylinder is 1 mm to 1.5 mm, and the minor axis of the elliptic cylinder is 0.5 mm to 0.8 mm.

[0059] When the light-transmitting part 2 is an elliptic cylinder, the light-transmitting part 2 can be rotated by 90° clockwise or counterclockwise to realize the conversion of the first light-transmitting face 21 and the second light-transmitting face 22, thereby realizing the conversion of the light refraction angle and completing the view angle switching.

[0060] The light conversion element 100 provided by the embodiment of the present application provides an easy-to-implement structure by arranging the light-transmitting part 2 as an elliptic cylinder structure, which is simple and easy to obtain, improves the convenience of the production process, and is flexible in rotation, facilitating switching and improving the light conversion efficiency.

[0061] As an optional embodiment, please refer to Figures 4 to 6 In the first state M, the first electrode 31 is turned on and attracts the end face 23 to rotate toward the light exit face 11, or in the second state N, the second electrode 32 is turned on and attracts the side face 24 to rotate toward the light exit face 11.

[0062] In the embodiment, by alternately turning on the first electrode 31 and the second electrode 32, the end face 23 or the side face 24 of the elliptic cylinder can be controlled to face the light exit face 11, respectively, to realize the refraction of light at different angles.

[0063] It should be noted that the first electrode 31 and the second electrode 32 cannot be opened at the same time, and only one of them can be opened at each time, so that the light conversion element 100 as a whole enters the first state M or the second state N, and the rotation of the light transmission part 2 is avoided from being disordered.

[0064] Alternatively, the opening and closing of the first electrode 31 and the second electrode 32 are determined by corresponding electromagnetic switch mechanisms, which can be arranged on the opposite surfaces of the accommodating part 1, and the opening and closing of the first electrode 31 and the second electrode 32 can be controlled respectively.

[0065] Alternatively, the first electrode 31 can be arranged on the light emitting surface 11 of the accommodating part 1, and when the first electrode 31 is opened, the magnetic field formed thereby can drive the end surface 23 of the internal elliptic cylinder to rotate and face the light emitting surface 11, and the light is refracted and dispersed after passing through the end surface 23, and is emitted in dispersion from the light emitting surface 11, forming the first state M.

[0066] Correspondingly, the second electrode 32 is arranged on the surface opposite to the light emitting surface 11 of the accommodating part 1, and when the second electrode 32 is opened, the magnetic field formed thereby can drive the side surface 24 of the internal elliptic cylinder to rotate and face the light emitting surface 11, and the light is refracted and converged after passing through the side surface 24, and is emitted in convergence from the light emitting surface 11, forming the second state N.

[0067] The light conversion element 100 provided by the embodiment of the present application is simple in structure layout and easy to operate, and can complete the conversion of the light angle through the electromagnetic switch mechanism, which is convenient for manual operation. The structure does not need to refract and reflect the light multiple times, can ensure the full use of the light, avoid the loss of the light intensity, and has better display brightness.

[0068] As an optional embodiment, please continue to refer to Figure 4 The light transmission part 2 includes the first magnetic particles 25 and the second magnetic particles 26 which are magnetically opposite, the end surface 23 is elliptical and has a minor axis, in the extension direction of the minor axis, the end surface 23 intersects with the side surface 24 to form a minor axis edge 27, the first magnetic particles 25 are arranged on the end surface 23 on one side of the minor axis edge 27, and the second magnetic particles 26 are arranged on the side surface 24 on one side of the minor axis edge 27.

[0069] In the embodiment, the first magnetic particles 25 and the second magnetic particles 26 which are magnetically opposite are arranged on the first light transmission surface 21 and the second light transmission surface 22 respectively, so that the first light transmission surface 21 and the second light transmission surface 22 have the magnetic opposite.

[0070] Optionally, the first magnetic particles 25 and the second magnetic particles 26 can be electromagnetic particles designed as chromium oxide or nickel, iron oxide, etc. with ferromagnetic properties, and can be made of paramagnetic or diamagnetic materials.

[0071] The first magnetic particles 25 and the second magnetic particles 26 can be respectively inlaid into the end face 23 and the side face 24 of the elliptical cylinder. Specifically, the PC (polycarbonate) plastic material elliptical cylinder is formed by mold injection compression. The electromagnetic particles are placed in the mold before forming, and then injection compression is performed to embed the electromagnetic particles into the PC (polycarbonate) plastic material elliptical cylinder, so that the magnetic properties of the end face 23 and the side face 24 are opposite.

[0072] The end face 23 is elliptical and has a minor axis, and the minor axis edge 27 is the intersection of the end face 23 and the side face 24. Optionally, the first magnetic particles 25 are N poles and the second magnetic particles 26 are S poles. Specifically, the first magnetic particles 25 can be inlaid on the end face 23 close to the minor axis edge 27, and the second magnetic particles 26 can be inlaid on the side face 24 close to the minor axis edge 27.

[0073] In this way, on the end face 23, the first magnetic particles 25 repel each other and maintain a certain distance, and the entire end face 23 forms an N pole. On the side face 24, the second magnetic particles 26 repel each other and maintain a certain distance, and the entire side face 24 forms an S pole. Each minor axis edge 27 has a first magnetic particle 25 and a second magnetic particle 26 with opposite magnetic properties, which are attracted to each other to reinforce the connection of the end face 23 and the side face 24 at the minor axis edge 27. On the basis of realizing that the end face 23 and the side face 24 have opposite magnetic properties, the stability of the overall structure of the elliptical cylinder is ensured.

[0074] In the present embodiment, the magnetic properties of the end face 23 and the side face 24 are opposite only by inlaying the first magnetic particles 25 and the second magnetic particles 26 on the end face 23 and the side face 24 respectively. The end face 23 and the side face 24 can also have opposite magnetic properties by other means, and the present application does not specially limit the specific implementation manner.

[0075] The light conversion element 100 provided by the embodiment of the present application has opposite magnetic properties of the end face 23 and the side face 24 by inlaying the first magnetic particles 25 and the second magnetic particles 26 on the end face 23 and the side face 24 of the elliptical cylinder respectively, which provides a magnetizing method. The forming method is simple and convenient, simplifies the forming process flow, is convenient for production and processing, and can also improve the stability of the overall structure connection of the elliptical cylinder, thereby providing protection for the normal operation of the light transmission part 2.

[0076] As an optional embodiment, please refer to Figure 5 and Figure 6The light conversion element 100 includes two or more light transmission parts 2, which are arranged in an array along the row direction X and the column direction Y respectively, and have an inter-row gap 4 between adjacent two rows of light transmission parts 2.

[0077] Optionally, a plurality of light transmission parts 2 can be arranged in the accommodation part 1, and the specific number can be determined according to the accommodation capacity of the accommodation part 1 and the actual light emission range. The specific number of the light transmission parts 2 is not specially limited in the present application.

[0078] Specifically, the plurality of light transmission parts 2 can be arranged along the row direction X and the column direction Y respectively, and arranged in an array as a whole to form a larger light coverage. The specific number of rows and columns can be determined according to different needs.

[0079] The electrode assembly 3 arranged on the surface of the accommodation part 1 also needs to be arranged corresponding to each row or each column of the light transmission part 2, so as to ensure that the magnetic field generated by the electrode assembly 3 can completely cover each light transmission part 2, and realize the overall adjustment of the plurality of light transmission parts 2.

[0080] Optionally, when the plurality of light transmission parts 2 simultaneously rotate along the long axis thereof, an inter-row gap 4 needs to be kept between adjacent two rows of light transmission parts 2, so as to meet the rotation of the light transmission part 2, so that it has a certain activity space, avoids the mutual collision and contact of adjacent two rows of light transmission parts 2 when rotating, and at the same time, an inter-column gap can also be arranged between each column, or no gap is arranged, and the columns are directly connected.

[0081] Optionally, the size of the inter-row gap 4 between adjacent two rows of light transmission parts 2 can be set according to actual needs, which can meet the space required for the rotation of each row of light transmission parts 2. However, it is still necessary to reduce the inter-row gap 4 as much as possible to avoid the waste of unnecessary space.

[0082] The light conversion element 100 provided by the embodiment of the present application realizes larger light processing, expands the light emission range, and meets the light conversion demand of a larger area by arranging a plurality of light transmission parts 2 in the accommodation part 1 and arranging them in an array. Meanwhile, the inter-row gap 4 can ensure the independent and safe operation of each light transmission part 2, avoid the collision and contact between the plurality of light transmission parts 2, and improve the stability and safety of the light conversion element 100 as a whole.

[0083] As an optional embodiment, please continue to refer to Figure 5 and Figure 6 The inter-row gap 4 includes a first gap 41 and a second gap 42. In the first state M, the first gap 41 is formed between adjacent two rows of light transmission parts 2, and in the second state N, the second gap 42 is formed between adjacent two rows of light transmission parts 2. The width of the first gap 41 in the column direction Y is greater than the width of the second gap 42 in the column direction Y.

[0084] Since the light-transmitting part 2 is rotating in operation, the row gap 4 between each row of light-transmitting part 2 is also changing.

[0085] Optionally, when the light-transmitting part 2 is an elliptic cylinder, in the first state M, the end faces 23 are collectively oriented towards the light-out surface 11, the row gap 4 between each row of end faces 23 is the first gap 41, and in the second state N, the side faces 24 are collectively oriented towards the light-out surface 11, the row gap 4 between each row of side faces 24 is the second gap 42.

[0086] Optionally, if the length of the minor axis of the end face 23 is less than the thickness of the side face 24, the first gap 41 between the end faces 23 is wider than the second gap 42 between the side faces 24, and when the light-transmitting part 2 rotates, the first gap 41 and the second gap 42 of each row of light-transmitting part 2 also change alternately.

[0087] The embodiment of the present application provides a light conversion element 100, which provides a specific process of the change of the row gap 4 when the light-transmitting part 2 rotates, and illustrates the variability of the size of the first gap 41 and the second gap 42, so that the accommodating part 1 has better accommodating capacity and can meet the rotation of light-transmitting parts 2 of different sizes, thereby providing reliable guarantee for the normal operation of the light-transmitting part 2.

[0088] As an optional embodiment, the first electrode 31 and the second electrode 32 are arranged on opposite sides of the accommodating part 1 in the thickness direction Z, the first electrode 31 and the second electrode 32 extend along the row direction X and the orthographic projection of the first electrode 31 and the second electrode 32 in the thickness direction Z is located in the row gap 4.

[0089] Optionally, the first electrode 31 can be arranged on the light-out surface 11, and the second electrode 32 is arranged on the opposite side of the light-out surface 11, and the electrode assembly 3 needs to be arranged in a transparent manner to avoid blocking the light, and at the same time, the relative arrangement of the electrode assembly 3 can make the electrodes away from each other to avoid short circuit caused by contact interference.

[0090] Considering that the light-transmitting part 2 of the elliptic cylinder is embedded with electromagnetic particles near the minor axis edge 27, the electrode assembly 3 is arranged on the surface of the accommodating part 1 and the projection is located in the row gap 4, which can be closer to the electromagnetic particles on the end face 23 or the side face 24, and it is easier for the magnetic poles to attract each other, thereby driving the rotation of the light-transmitting part 2.

[0091] Optionally, the arrangement of the electrode assembly 3 can correspond to the trend of the array-arranged light-transmitting part 2, and can extend in multiple rows along the row direction X to form a comb-shaped, strip-shaped or grid-shaped strip structure, so as to ensure that each row of light-transmitting part 2 can be controlled and adjusted.

[0092] The number of strips extended by the electrode assembly 3 is determined by the number of rows of corresponding light-transmitting part 2, and it should be ensured that each row of light-transmitting part 2 corresponds to an electrode strip control, so as to realize the overall adjustment of the array-arranged light-transmitting part 2.

[0093] The light conversion element 100 provided by the embodiment of the present application limits the extension direction and specific setting position of the electrode assembly 3, more effectively drives the light transmission part 2 to rotate by itself, can control the whole array of the plurality of light transmission parts 2, and is more likely to rotate the light transmission part 2.

[0094] As an optional embodiment, in the first state M, the orthographic projection of the first electrode 31 on the thickness direction Z is tangent to the two edges of the end surface 23 and located in the first gap 41, and in the second state N, the orthographic projection of the second electrode 32 on the thickness direction Z is coincident with the two edges of the side surface 24 and located in the second gap 42.

[0095] In the embodiment, the positions of the first electrode 31 and the second electrode 32 are set respectively, so that the first electrode 31 is better adapted to the first state M, and the second electrode 32 is better adapted to the second state N.

[0096] When in the first state M, the orthographic projection of the first electrode 31 is tangent to the two edges of the end surface 23, that is, tangent to the short axis edge 27 thereof, the first electrode 31 can be further close to the first magnetic particle 25 at the short axis edge 27 of the end surface 23, and the two are more likely to attract each other, which is more conducive to the attraction and driving of the first electrode 31 to the end surface 23.

[0097] When in the second state N, the orthographic projection of the second electrode 32 is coincident with the two edges of the side surface 24, that is, coincident with the short axis edge 27 thereof, the second electrode 32 can be further close to the second magnetic particle 26 at the short axis edge 27 of the side surface 24, and the two are more likely to attract each other, which is more conducive to the attraction and driving of the second electrode 32 to the side surface 24.

[0098] The light conversion element 100 provided by the embodiment of the present application sets the positions of the first electrode 31 and the second electrode 32 respectively, more specifically meets the mutual attraction with the end surface 23 and the side surface 24, makes it easier to attract and rotate each other, better adapts to the first state M and the second state N, and improves the conversion efficiency between the first state M and the second state N.

[0099] As an optional embodiment, the light transmission parts 2 of each row are arranged in succession and connected in sequence in the row direction X.

[0100] It can be understood that there is no gap between the light transmission parts 2 in each column, and the light transmission parts 2 in adjacent two columns are connected in sequence to improve the stability of the overall structure and avoid shaking.

[0101] Since multiple light-transmitting parts 2 are rotating at the same time, when the same end face 23 or side face 24 is facing the light-emitting face 11, the connected light-transmitting parts 2 have the same magnetism and repel each other, and thus the electrode assembly 3 needs to have a greater attractive force on the electromagnetic particles than the repulsive force between the adjacent light-transmitting parts 2, so as to overcome the repulsion and drive the self-rotation of the whole.

[0102] For the connection between the light-transmitting parts 2 in each column, the connection can be integrally formed by a mold injection compression process, which simplifies the process flow and avoids manual connection in the later stage.

[0103] The light-transmitting parts 2 in each column are sequentially connected in the row direction X to form a light-transmitting whole, which avoids shaking and improves the stability of the whole structure and reduces the risk of failure caused by disconnection.

[0104] As an optional embodiment, please continue to refer to Figure 5 and Figure 6 The light-transmitting parts 2 in each column are sequentially connected in the row direction X to form a light-transmitting whole, which avoids shaking and improves the stability of the whole structure and reduces the risk of failure caused by disconnection.

[0105] Optionally, the reflecting part 5 can be added around the accommodating part 1, and the reflecting part 5 can be a reflecting sheet arranged on the outer surface around the accommodating part 1.

[0106] Considering that a small amount of reflected light can be emitted from around the accommodating part 1 after the light is refracted by the light-transmitting part 2, the reflecting part 5 arranged around the accommodating part 1 can further reflect part of the light to the light-emitting face 11 to improve the display brightness and avoid the attenuation of the light intensity.

[0107] The light-transmitting parts 2 in each column are sequentially connected in the row direction X to form a light-transmitting whole, which avoids shaking and improves the stability of the whole structure and reduces the risk of failure caused by disconnection.

[0108] The light-transmitting parts 2 in each column are sequentially connected in the row direction X to form a light-transmitting whole, which avoids shaking and improves the stability of the whole structure and reduces the risk of failure caused by disconnection.

[0109] Optionally, the optical film layer includes a diffusion sheet, an ultramicro multi-crystal structure brightness enhancement film (BEF), a reflective polarized brightness enhancement film (DBEF), and a light guide layer, and the like. The light emitted by the backlight source passes through the optical film layer and then enters the light-transmitting part 100 to complete the light conversion.

[0110] The backlight module provided by the embodiment of the present application can process light through the optical film layer, then convert the light, has a gain effect on the light, more fully collects the light, improves the utilization rate of the light, more greatly realizes the view angle conversion of the light, guarantees the display brightness and resolution, and has a better display effect.

[0111] The display device provided by the embodiment of the present application comprises the backlight module as described above.

[0112] As shown in Figure 7 The display device comprises a liquid crystal display (LCD) in the display technical field, which is composed of a liquid crystal cell 13 placed between two parallel glass substrates 11. A thin film transistor 12 (TFT) is arranged on the lower substrate glass, which is called an array substrate. A color filter 14 is arranged on the upper substrate glass, which comprises RGB sub-pixels and a black matrix, and is called a color film substrate.

[0113] The color film substrate, the array substrate and the liquid crystal cell 13 are assembled in a top-down manner to form an overall display panel. The backlight source 10 is arranged below the display panel. The light emitted by the backlight source 10 enters the display panel after being diffused or contracted by the light conversion element 100.

[0114] Optionally, the light emitted by the backlight source 10 can first pass through a diffusion sheet, a super-macro polycrystalline structure brightness enhancement film (BEF), a reflective polarized light brightness enhancement film (DBEF) and a light guide layer, and then be converted and adjusted by the light conversion element 100 after gain processing.

[0115] The light conversion element 100, the backlight module and the display device provided by the embodiment of the present application can make the first light transmission surface 21 and the second light transmission surface 22 of the light transmission part 2 have different magnetism by arranging the light transmission part 2 and the electrode assembly 3 in the accommodating part 1. The first light transmission surface 21 and the second light transmission surface 22 can be alternately attracted by the electrode assembly 3 and refract toward the light by using the principle that the electrode assembly 3 and the light transmission part 2 are attracted to each other due to different magnetism. The light transmission part 2 as a whole can rotate in the accommodating part 1, so that the light forms different refraction angles, and the effect of light diffusion or contraction is achieved. The light is converted by the above principle, the structure is simple, the light does not need to pass through multiple refraction switching, the light intensity is avoided to attenuate while the view angle conversion is realized, the brightness and resolution of the light are guaranteed, and a better visual effect is obtained. Meanwhile, the device has a simple structure, avoids using complex and expensive optical devices, and can complete the light conversion at a low cost.

[0116] Although the present application has been described with reference to preferred embodiments, various modifications can be made to the application without departing from the scope of the application. In particular, the technical features mentioned in the various embodiments can be combined in any way, provided that there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A light ray converting element, characterized by, The light conversion element comprises: a receiving portion having an out-light surface; a light-transmitting portion disposed in the receiving portion, the light-transmitting portion having a first light-transmitting surface and a second light-transmitting surface with opposite magnetic properties, the first light-transmitting surface and the second light-transmitting surface being respectively configured to change a propagation path of light, the first light-transmitting surface comprising a plane and the second light-transmitting surface comprising a curved surface; an electrode assembly comprising a first electrode and a second electrode with opposite polarities, the first electrode and the second electrode being spaced apart and oppositely disposed on the receiving portion; wherein the light conversion element is switchable between a first state and a second state; in the second state transitioning to the first state, the first electrode attracting the first light-transmitting surface and causing the first light-transmitting surface to face the out-light surface, so that the light is diffusedly propagated from the out-light surface; in the first state transitioning to the second state, the second electrode attracting the second light-transmitting surface and causing the second light-transmitting surface to face the out-light surface, so that the light is convergently propagated from the out-light surface.

2. The light converting element according to claim 1, characterized in that The light-transmitting portion is an elliptical cylinder having two opposite end surfaces and a side surface connected between the two end surfaces, the end surfaces being the planes, and the side surface being the curved surface, the light covering a larger range after passing through the end surfaces than after passing through the side surface.

3. The light converting element according to claim 2, characterized in that In the first state, the first electrode is turned on and attracts the end surface to rotate towards the out-light surface, or, in the second state, the second electrode is turned on and attracts the side surface to rotate towards the out-light surface.

4. The light converting element according to claim 2, characterized in that The light-transmitting portion comprises first magnetic particles and second magnetic particles with opposite magnetic properties, the end surface is elliptical and has a minor axis, in the extension direction of the minor axis, the end surface intersects with the side surface to form a minor axis edge, the first magnetic particles are disposed on the end surface on one side of the minor axis edge, and the second magnetic particles are disposed on the side surface on one side of the minor axis edge.

5. The light converting element according to claim 2, characterized in that The light conversion element comprises two or more light-transmitting portions, the light-transmitting portions are arranged in an array along a row direction and a column direction respectively, and the light-transmitting portions in adjacent two rows have a row gap therebetween.

6. The light converting element according to claim 5, characterized in that The row gap comprises a first gap and a second gap, in the first state, the first gap is formed between the light-transmitting portions in adjacent two rows, in the second state, the second gap is formed between the light-transmitting portions in adjacent two rows, and the width of the first gap in the column direction is greater than the width of the second gap in the column direction.

7. The light converting element according to claim 6, characterized in that The first electrode and the second electrode are disposed on opposite sides of the receiving portion in the thickness direction, the first electrode and the second electrode extend along the row direction and the orthographic projection thereof in the thickness direction is located in the row gap.

8. The light converting element according to claim 7, characterized in that In the first state, the orthographic projection of the first electrode in the thickness direction is tangent to the two sides of the end surface and located in the first gap, and in the second state, the orthographic projection of the second electrode in the thickness direction is coincident with the two sides of the side surface and located in the second gap.

9. The light converting element according to claim 5, characterized in that The light-transmitting portions in each row are sequentially disposed and connected in the row direction.

10. The light converting element according to claim 1, characterized in that The light conversion element further comprises a reflecting portion disposed on an outer surface of the accommodating portion, the reflecting portion being configured to reflect the light to the light exit surface.

11. A backlight module, characterized in that, Comprising: a backlight; an optical film layer disposed on the backlight; the light conversion element according to any one of claims 1 to 10, the light conversion element being disposed on a side of the optical film layer facing away from the backlight.

12. A display device, characterized by comprising: A backlight module comprising the backlight according to claim 11.

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