BACKLIGHT STRUCTURE, DISPLAY, AND ELECTRONIC DEVICE

Abstract

A backlight structure (200), a display, and an electronic device are provided. The backlight structure (200) includes a light source layer (201), an optically functional structure layer, and a brightness enhancement film structure layer. The light source layer (201), the optically functional structure layer, and the brightness enhancement film structure layer are stacked in a first direction. The brightness enhancement film structure layer includes at least one brightness enhancement film layer (205 or 206). Each brightness enhancement film layer (205 or 206) of the at least one brightness enhancement film layer (205 or 206) includes a substrate (2051 or 2061) and a prism pillar layer (2052 or 2062) stacked and connected. The prism pillar layer (2052 or 2062) includes at least one protrusion structure disposed on the substrate (2051 or 2061). This effectively increases the light-emitting angle of the brightness enhancement film structure layer, improving the overall brightness of the display when the display is viewed from a large viewing angle, and realizing a wide viewing angle display of the display.

Description

[Technical field]

[0001] This application claims priority to Chinese Patent Application No. 202111672594.7, entitled “BACKLIGHT STRUCTURE, DISPLAY, AND ELECTRONIC DEVICE,” filed with the State Intellectual Property Office of the People's Republic of China on December 31, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of display technology, and in particular to backlight structures, displays, and electronic devices. [Background technology]

[0003] At present, with the development of display technology, electronic devices such as computers and televisions are becoming larger in size. Due to the characteristics of high definition and high brightness of liquid crystal displays, they are widely used in various electronic devices such as computers and televisions. As shown in FIG. 1, a liquid crystal display 001 usually includes a display screen 100 and a backlight structure 200 connected to the surface opposite to the display surface of the display screen 100. The light emitted by the backlight structure 200 is usually emitted toward the center of the display screen 100, and the light emission angle is usually within a small range. Therefore, in a large-sized liquid crystal display 001, when a user views the liquid crystal display 001 from different angles, the brightness of the image viewed by the user will be different. For example, the brightness of the display screen 100 viewed by a user when the display screen 100 is viewed from a front viewing angle is much greater than the brightness of the display screen when viewed from a side viewing angle. In other words, when the screen is viewed from a large viewing angle, the brightness of the entire screen is low.

[0004] In the prior art, as shown in FIG. 2, the viewing angle of the display screen is usually increased by attaching a wide viewing angle film 101 to the display surface of the display screen 100. Specifically, as shown in FIG. 2, the wide viewing angle film 101 has a first substrate 1011, a second substrate 1012, a functional layer 1013, and a connection layer 1014, which are stacked in order from top to bottom. The connection layer 1014 is connected to the surface of the display screen 100. The function layer 1013 includes a plurality of inverted trapezoid structures. When light emitted from the display screen 100 enters the trapezoid structures, the light is scattered in different directions. For example, as shown in FIG. 2, when light i1 enters the trapezoid structures, scattered light in different directions, for example i11, i12, and i13, is formed, thereby realizing the wide viewing angle display of the liquid crystal display.

[0005] However, in the above technical solution, the wide viewing angle film 101 is added, which absorbs light to a certain extent, resulting in a certain brightness loss. In addition, the light emitted by the backlight structure will be scattered a second time by the wide viewing angle film, causing a part of the light of one pixel to be scattered to the adjacent pixels. This will cause optical crosstalk in the displayed image, resulting in poor image quality. Summary of the Invention [Means for solving the problem]

[0006] To solve the aforementioned problems, embodiments of the present application provide a backlight structure, a display, and an electronic device.

[0007] According to a first aspect, an embodiment of the present application provides a backlight structure including a light source layer, an optical function structure layer, and a brightness enhancement film structure layer, wherein the light source layer, the optical function structure layer, and the brightness enhancement film structure layer are stacked in a first direction.

[0008] The brightness enhancing film structure layer includes at least one brightness enhancing film layer, and each of the at least one brightness enhancing film layer includes a substrate and a prismatic post layer stacked and connected together.

[0009] The prismatic pillar layer includes at least one protruding structure disposed on a substrate.

[0010] In a possible implementation of the first aspect, the at least one protruding structure comprises an arc-shaped protruding structure and / or an angular protruding structure.

[0011] In possible implementations of the first aspect, the arc-shaped protrusion structure is a dot-type arc-shaped protrusion structure, a strip-type arc-shaped protrusion structure, or a multi-segment arc-shaped protrusion structure.

[0012] The horn-like projection structures are dot-type horn-like projection structures, strip-type horn-like projection structures, and multi-segment type horn-like projection structures.

[0013] It is understood that in this embodiment of the present application, the strip-shaped arc-shaped protrusion may be an arc-shaped columnar structure as described below. The strip-shaped angular protrusion includes a prism structure, and the prism structure includes a triangular prism structure, a trapezoidal prism structure, or other prism structure.

[0014] It can be understood that in this embodiment of the present application, the structure of the brightness enhancement film structure layer of the backlight structure in the display is designed. Specifically, the multiple prism pillars in the brightness enhancement film layer are arranged as prism pillars of a circular arc-shaped pillar structure or an angular prism structure. In this way, the light emission angle of the brightness enhancement film structure layer can be effectively increased without adding a wide viewing angle film. This can improve the brightness of the entire display when the display is viewed from a large viewing angle, and realize the wide viewing angle display of the display.

[0015] In a possible implementation of the first aspect, the at least one brightness enhancing film layer particularly comprises a first brightness enhancing film layer and a second brightness enhancing film layer stacked in a first direction.

[0016] The first brightness enhancement film layer includes a first substrate and a first prism pillar layer that are stacked and connected together, the first prism pillar layer includes a plurality of first prism pillars connected in parallel, and the plurality of first prism pillars connected in parallel are all prism structures.

[0017] The second brightness enhancement film layer includes a second substrate and a second prism pillar layer that are stacked and connected together, and the second prism pillar layer includes a plurality of second prism pillars connected in parallel, and the plurality of second prism pillars connected in parallel are all arc-shaped pillar structures.

[0018] It can be seen that in this embodiment of the present application, the second prism pillars in the second brightness enhancing film layer are arranged as arc-shaped pillar structures, which can effectively improve the uniformity of the output light of the brightness enhancing film structure layer, and can broaden the angle range of the output light of the brightness enhancing film structure layer to a certain extent.

[0019] In a possible implementation of the first aspect, the first substrate is connected to the optically functional structure layer.

[0020] The first substrate, the first prism pillar layer, the second prism pillar layer, and the second substrate are stacked in a first direction, or the first substrate, the first prism pillars, the second substrate, and the second prism pillar layer are stacked in the first direction.

[0021] In a possible implementation of the first aspect, the included angle between the axial direction of the first prism pillar and the axial direction of the second prism pillar is 90 degrees.

[0022] In a possible implementation of the first aspect, the plurality of second prism posts in the second prism post layer are structures of the same size.

[0023] In a possible embodiment of the first aspect, the angular range of the central angle corresponding to the arc in the cross section of the second prism rod is 64 degrees to 70 degrees.

[0024] In a possible implementation of the first aspect, the radius of curvature corresponding to the circular arc in the cross section of the second prism rod is 24 μm or less.

[0025] In a possible implementation of the first aspect, the central angle corresponding to the arc in the cross section of the multiple second prism pillars of the second prism pillar layer gradually increases in the direction from the center position of the second prism pillar layer toward the second prism pillars at the edge.

[0026] It is understood that in this embodiment of the present application, the base angle of the plurality of second prism pillars in the second brightness enhancement film layer may gradually decrease from the center of the first substrate layer to the second prism pillars at the edge. In this way, the angle of the exiting light of the second prism pillars at the edge of the second brightness enhancement film layer may be small. This can reduce the amount of light exiting to the side of the second brightness enhancement film layer, and reduce the light energy loss.

[0027] In a possible implementation of the first aspect, the first prism posts in the first prism post layer are structures of the same size.

[0028] In a possible implementation of the first aspect, the first prism pillar includes a first contact surface connected to the first substrate, and a first light exit surface and a second light exit surface connected to the first contact surface.

[0029] The included angle between the first light output surface and the first contact surface is 37 degrees to 55 degrees, and the included angle between the second light output surface and the first contact surface is in the angle range of 37 degrees to 55 degrees.

[0030] In a possible implementation of the first aspect, the apex angles of the first prism posts in the first prism post layer, which face the first substrate, gradually increase in a direction from a central position of the second prism post layer to an edge of the second prism posts.

[0031] It can be seen that in this embodiment of the present application, the apex angles of the multiple first prism pillars facing the first substrate are set to gradually increase from the center position of the second prism pillar layer to the edge second prism pillars, so that the angle of the exiting light of the first prism pillars at the edge of the first brightness enhancing film layer is small, which can reduce the amount of light exiting to the side of the first brightness enhancing film layer and reduce the light energy loss.

[0032] In a possible implementation of the first aspect, the at least one brightness enhancing film layer particularly comprises a first brightness enhancing film layer and a second brightness enhancing film layer stacked in a first direction.

[0033] The first brightness enhancement film layer includes a first substrate and a first prism pillar layer that are stacked and connected together, and the first prism pillar layer includes a plurality of first prism pillars connected in parallel, and the plurality of first prism pillars connected in parallel are all arc-shaped pillar structures.

[0034] The second brightness enhancement film layer includes a second substrate and a second prism pillar layer that are stacked and connected together, and the second prism pillar layer includes a plurality of second prism pillars connected in parallel, and the plurality of second prism pillars connected in parallel are all arc-shaped pillar structures.

[0035] In this embodiment of the present application, the first prism pillar and the second prism pillar are both arranged to be arc-shaped pillar structures, which can further widen the angle range of the output light of the brightness enhancement film structure layer.

[0036] In a possible implementation of the first aspect, the at least one brightness enhancing film layer in particular comprises a third brightness enhancing film layer.

[0037] The third brightness enhancing film layer includes a third substrate and a third prism pillar layer which are stacked and connected, the third prism pillar layer includes a plurality of third prism pillars connected in parallel, and the plurality of second prism pillars connected in parallel are all arc-shaped pillar structures.

[0038] In this embodiment of the present application, the brightness enhancement film structure layer includes only one third brightness enhancement film layer, and the prism pillars of the third brightness enhancement film layer are arranged as arc pillar structures, which can reduce the cost and increase the angle range of the output light of the brightness enhancement film structure layer.

[0039] In a possible implementation of the first aspect, the third prism posts in the third prism post layer are structures of the same size.

[0040] In a possible embodiment of the first aspect, the angular range of the central angle corresponding to the arc in the cross section of the third prism rod is 64 degrees to 118 degrees.

[0041] In a possible embodiment of the first aspect, the radius of curvature corresponding to the arc in the cross section of the third prism rod is 5 μm to 24 μm.

[0042] In a possible implementation of the first aspect, the central angle corresponding to the arc in the cross section of the multiple third prism pillars of the third prism pillar layer gradually increases in the direction from the center position of the third prism pillar layer toward the second prism pillars at the edge.

[0043] It can be seen that in this embodiment of the present application, the central angle corresponding to the arc in the cross section of the multiple third prism pillars is set to gradually increase in the direction from the center position of the third prism pillar layer to the second prism pillar at the edge, so that the angle of the exiting light of the third prism pillar at the edge of the third brightness enhancement film layer is small, which can reduce the amount of exiting light to the side of the third brightness enhancement film layer, and reduce the light energy loss.

[0044] In a possible implementation of the first aspect, the at least one brightness enhancing film layer particularly comprises a first brightness enhancing film layer and a second brightness enhancing film layer stacked in a first direction.

[0045] The first brightness enhancement film layer includes a first substrate and a first prism pillar layer that are stacked and connected together, the first prism pillar layer includes a plurality of first prism pillars connected in parallel, and the plurality of first prism pillars connected in parallel are all prism structures.

[0046] The second brightness enhancing film layer includes a second substrate and a second prism pillar layer that are stacked and connected together, the second prism pillar layer includes a plurality of second prism pillars connected in parallel, and the plurality of second prism pillars connected in parallel are all prism structures.

[0047] In a possible implementation of the first aspect, the first substrate is connected to the optically functional structure layer.

[0048] The first substrate, the first prism pillar layer, the second prism pillar layer, and the second substrate are stacked in a first direction, or the first substrate, the first prism pillars, the second substrate, and the second prism pillar layer are stacked in the first direction.

[0049] In a possible implementation of the first aspect, the included angle between the axial direction of the first prism pillar and the axial direction of the second prism pillar is greater than 90 degrees.

[0050] In this embodiment of the present application, the included angle between the axial direction of the first brightness enhancement film layer and the axial direction of the second brightness enhancement film layer is also set to be greater than 90 degrees, so that the amount of light reflected back to the light source can be reduced and the amount of light emitted at a large angle can be increased, which increases the range and the total energy of the emitted light of the entire brightness enhancement film structure layer to a certain extent.

[0051] The angle between the axial direction of the first prism pillar and the axial direction of the second prism pillar may be set to 140 degrees to 180 degrees.

[0052] In a possible implementation of the first aspect, the first prism pillar includes a first contact surface connected to the first substrate, and a first light output surface and a second light output surface connected to the first contact surface, wherein the included angle between the first light output surface and the first contact surface is between 31 degrees and 37 degrees, and the angle range of the included angle between the second light output surface and the first contact surface is between 31 degrees and 37 degrees.

[0053] The second prism pillar includes a second contact surface connected to the second substrate, and a third light output surface and a fourth light output surface connected to the second contact surface, the included angle between the third light output surface and the fourth contact surface is 31 degrees to 37 degrees, and the angle range of the included angle between the third light output surface and the second contact surface is 31 degrees to 37 degrees.

[0054] In this embodiment of the present application, the angle range of the apex angle of each of the first brightness enhancement film layer and the second brightness enhancement film layer is set to 106 degrees to 118 degrees, that is, the angle range of the base angle of the first brightness enhancement film layer is 31 degrees to 37 degrees. Compared with some embodiments, for example, compared with the solution in which the apex angle of the first brightness enhancement film layer is 90 degrees, this setting solution can increase the amount of outgoing light at large angles. This increases the range and increases the total energy of the outgoing light of the entire first brightness enhancement film layer to a certain extent.

[0055] In a possible implementation of the first aspect, the prismatic column layer includes a first edge region, a second edge region, and an intermediate region, the intermediate region being sandwiched between the first edge region and the second edge region.

[0056] The prism pillars in the middle region are arc-shaped pillar structures, and the prism pillars in the first edge region and the second edge region are prism structures.

[0057] It can be understood that the arc-shaped structure has a larger light spreading angle, so the prism pillars in the middle region are arranged as an arc-shaped pillar structure, which can effectively expand the output angle range of the output brightness enhancement film layer. The light spreading angle of the prism structure with a 90-degree apex angle is small. Therefore, the prism pillars in the first edge region and the second edge region may be arranged as triangular prisms with a 90-degree apex angle. This can prevent a lot of light from being output from the edge region of the brightness enhancement film layer, and reduce light energy loss.

[0058] In a possible implementation of the first aspect, the prism structures include triangular prism structures or trapezoidal prism structures.

[0059] In a possible implementation of the first aspect, the arc-shaped cylindrical structure comprises a semi-circular cylindrical structure or a semi-elliptical cylindrical structure.

[0060] In a possible implementation of the first aspect, the optically functional structure layer includes a light diffusing layer, a light selective transmission layer, and a color conversion film layer stacked in a first direction.

[0061] A second aspect of an embodiment of the present application provides a display including a display component and a backlight structure, the display component being disposed on a surface of the brightness enhancing film structure layer in a first direction.

[0062] A third aspect of an embodiment of the present application provides an electronic device including a display. [Brief description of the drawings]

[0063] [Figure 1] 1 is a diagram of a structure of a liquid crystal display according to some embodiments of the present application. [Diagram 2] FIG. 2 is a diagram of a structure of a wide viewing angle film according to some embodiments of the present application. [Diagram 3] FIG. 2 is an exploded view of a backlight structure according to some embodiments of the present application. [Figure 4a]FIG. 2 is a diagram of a structure of an arrangement of a first brightness enhancing film layer and a second brightness enhancing film layer according to some embodiments of the present application. [Figure 4b] 4A-4C are diagrams of light propagation in a first brightness enhancing film layer having apex angles of separately 90 degrees and greater than 90 degrees, according to some embodiments of the present application. [Diagram 5] FIG. 11 is a simulation diagram of the light field distribution of a backlight structure according to some embodiments of the present application, in which the first brightness enhancing film layer and the second brightness enhancing film layer have the same structure, the axial included angle between the first brightness enhancing film layer and the second brightness enhancing film layer is different, and the first brightness enhancing film layer corresponds to a different base angle. [Figure 6] 2 is a diagram of a backlight light field distribution of a backlight structure according to some embodiments of the present application. [Figure 7] FIG. 2 is a diagram of a brightness enhancing film structure layer according to some embodiments of the present application. [Figure 8] FIG. 13 is a diagram of light propagation in the second brightness enhancing film layer when the cross-sectional shape of the second prism rod is a circular arc, according to some embodiments of the present application. [Figure 9] FIG. 13 is a diagram of light propagation in the second brightness enhancing film layer when the cross-sectional shape of the second prism pillar is triangular, according to some embodiments of the present application. [Figure 10] FIG. 8 is a simulation diagram of the light field distribution of a backlight structure according to some embodiments of the present application, in which the brightness enhancement film structure layer is the structure shown in FIG. 7, the included angle between the axial direction L1 of the first brightness enhancement film layer and the axial direction L2 of the second brightness enhancement film layer is 90 degrees, and the first brightness enhancement film layer and the second brightness enhancement film layer correspond to different base angles. [Figure 11] FIG. 8 is a diagram of the light field distribution of a backlight structure according to some embodiments of the present application, in which the brightness enhancement film structure layer is the structure shown in FIG. 7, the included angle between the axial direction of the first brightness enhancement film layer and the axial direction of the second brightness enhancement film layer is 90 degrees, and the first brightness enhancement film layer and the second brightness enhancement film layer correspond to different base angles. [Figure 12] FIG. 2 is a diagram of a structure of a second brightness enhancing film layer according to some embodiments of the present application. [Figure 13a] FIG. 2 is a diagram of a structure of a third brightness enhancing film layer according to some embodiments of the present application. [Figure 13b] FIG. 2 is a diagram of a structure of a third brightness enhancing film layer according to some embodiments of the present application. [Figure 14] 13a, and FIG. 13b are simulation diagrams of the light field distribution of a backlight structure according to some embodiments of the present application, in which the brightness enhancement film structure layer is the structure shown in FIG. 13a, and the third brightness enhancement film layer corresponds to different base angles and different radii of curvature. [Figure 15] A simulation diagram of the light field distribution of a backlight structure according to some embodiments of the present application, when the brightness enhancement film structure layer is the structure shown in Figure 13a, and the third brightness enhancement film layer corresponds to different base angles and different apex angle curvature radii. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0064] In the following, the implementation of the present application will be described using a specific embodiment. Those skilled in the art can easily know other advantages and effects of the present application based on the contents disclosed herein. Although the present application is described with reference to some embodiments, it does not mean that the characteristics of the present application are limited to only this embodiment. On the contrary, the purpose of describing the present application with reference to the embodiments is to cover alternatives or modifications that may be derived according to the claims of the present application. For a thorough understanding of the present application, the following description includes many specific details. The present application may be alternatively implemented without using these details. In addition, some specific details are omitted from the description to avoid confusion or obscuring the focus of the present application. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other if there is no contradiction.

[0065] It should be noted herein that the same reference numerals and letters in the following attached drawings represent the same items. Thus, once an item is defined in the attached drawings, the item does not need to be further defined or interpreted in the following attached drawings. In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., is an orientation or positional relationship based on the attached drawings, and is merely intended to facilitate and simplify the description of this application, and does not indicate or imply that the described device or element needs to have a particular orientation or be configured and operated in a particular orientation. Thus, such terms should not be understood as a limitation on this application. In addition, the terms "first" and "second" are used for explanatory purposes only and should not be understood as an indication or implied relative importance.

[0066] To clarify the objectives, technical solutions and advantages of the present application, the following further describes the embodiments of the present application in detail with reference to the accompanying drawings.

[0067] In order to solve the above problems, an embodiment of the present application provides a liquid crystal display, in which the structure of the brightness enhancement film structure layer of the backlight structure in the liquid crystal display is designed, which improves the brightness of the entire liquid crystal display when the display is viewed from a large viewing angle when no wide viewing angle film is added, and realizes the wide viewing angle display of the liquid crystal display.

[0068] In the first implementation solution, in this embodiment of the present application, the degree of the apex angle of the triangular prism in each brightness enhancement film layer in the brightness enhancement film structure layer is set to a specified angle to increase the amount of light emitted from a large angle in the brightness enhancement film layer, thus increasing the viewing angle of the liquid crystal display, and implementing the wide viewing angle display of the liquid crystal display. The viewing angle can be understood as the deflectable angle of the user's viewing direction relative to the front viewing direction to the display screen when the brightness of the display screen viewed by the user is guaranteed to be the specified brightness.

[0069] FIG. 3 is an exploded view of a backlight structure according to an embodiment of the present application. As shown in FIG. 3, the backlight structure may include a light source layer 201, an optical function structure layer, and a brightness enhancement film structure layer. The optical function structure layer includes a diffusion layer 202, a spectral selective transmission film layer 203, and a color conversion film layer 204. The brightness enhancement film structure layer includes a first brightness enhancement film 205 and a second brightness enhancement film layer 206. The light source layer 201, the diffusion layer 202, the spectral selective transmission film layer 203, the color conversion film layer 204, the first brightness enhancement film 205, and the second brightness enhancement film layer 206 are stacked and connected in order from bottom to top.

[0070] In some embodiments, the light source layer 201 may have a color conversion function. Therefore, the backlight structure may only include a light source layer 201, a diffusion layer 202, and a brightness enhancement film structure layer, which are stacked and connected in order from bottom to top.

[0071] 4a is a diagram of a structure of an arrangement of a first brightness enhancing film layer 205 and a second brightness enhancing film layer 206 according to an embodiment of the present application. The first brightness enhancing film layer 205 and the second brightness enhancing film layer 206 may be stacked, and the first brightness enhancing film layer 205 may be disposed below the second brightness enhancing film layer 206.

[0072] As shown in FIG. 4a, the first brightness enhancement film layer 205 includes a first substrate 2051 and a first prism pillar layer connected to the top surface of the first substrate 2051, the first prism pillar layer includes a plurality of first prism pillars 2052 arranged in parallel, the first prism pillars 2052 have a triangular prism structure. It will be understood that the triangular prism structure referred to in this embodiment of the present application is a pillar structure having a triangular cross section. Each side of the plurality of first prism pillars 2052 includes a first contact surface 2053 connected to the substrate, and a first light exit surface 2054 and a second light exit surface 2055 adjacent to the first contact surface 2053. The straight lines on which the edges corresponding to each first contact surface 2053 of each of the plurality of first prism pillars 2052 are located are parallel. In some embodiments, the first light output surface 2054 and the second light output surface 2055 may be the same size light output surface.

[0073] For ease of explanation, in this embodiment of the present application, the included angle between the first light exit surface 2054 and the first contact surface 2053 is defined as the base angle of the first brightness enhancement film layer 205, the included angle between the first light exit surface 2054 and the second light exit surface 2055 is defined as the apex angle of the first brightness enhancement film layer 205, and the extension direction of each connection edge between the first light exit surface 2054 and the second light exit surface 2055 of the first prism pillar 2052 is defined as the axial direction L1 of the first brightness enhancement film layer 205.

[0074] In this embodiment of the present application, the first substrate 2051 and the multiple first prism posts 2052 arranged in parallel and connected to the top surface of the first substrate 2051 may be made of different materials. The first substrate 2051 may be made of a plastic material, and the first prism posts 2052 may be made of a glass material.

[0075] The second brightness enhancing film layer 206 includes a second substrate 2061 and a second prism pillar layer connected to the upper surface of the second substrate 2061. The second prism pillar layer includes a plurality of second prism pillars 2062 arranged in parallel. The second prism pillars 2062 are triangular prisms. Each of the plurality of second prism pillars 2062 includes a second contact surface 2063 connected to the second substrate 2061, and a third light exit surface 2064 and a fourth light exit surface 2065 adjacent to the second contact surface 2063. The straight lines on which the edges corresponding to each second contact surface 2063 of each of the plurality of second prism pillars 2062 are located are parallel.

[0076] In some embodiments, the third light exit surface 2064 and the fourth light exit surface 2065 may be the same light exit surface. For ease of explanation, in this embodiment of the present application, the included angle between the third light exit surface 2064 and the second contact surface 2063 is defined as the base angle of the second brightness enhancing film layer 206, the included angle between the third light exit surface 2064 and the fourth light exit surface 2065 is defined as the apex angle of the second brightness enhancing film layer 206, and the extending direction of each connecting edge between the third light exit surface 2064 and the fourth light exit surface 2065 of the second prism pillar 2062 is defined as the axial direction L2 of the second brightness enhancing film layer 206.

[0077] In this embodiment of the present application, the second substrate 2061 and the multiple first prism posts 2062 arranged in parallel and connected to the top surface of the second substrate 2061 may be made of different materials. The second substrate 2061 may be made of a plastic material, and the second prism posts 2062 may be made of a glass material.

[0078] In some embodiments, the angle range of the apex angle of the first brightness enhancing film layer 205 may be 106 degrees to 118 degrees, i.e., the angle range of the base angle of the first brightness enhancing film layer 205 may be 31 degrees to 37 degrees. Compared with some embodiments, for example, compared with the solution where the apex angle of the first brightness enhancing film layer 205 is 90 degrees, this setting solution can increase the amount of light emitted at large angles, which increases the range and the total energy of the light emitted throughout the first brightness enhancing film layer 205 to a certain extent.

[0079] In some embodiments, the apex angle of the second brightness enhancing film layer 206 may range from 106 degrees to 118 degrees, and the base angle of the second brightness enhancing film layer 206 may range from 31 degrees to 37 degrees. Compared to some embodiments, for example, compared to a solution where the apex angle of the second brightness enhancing film layer 206 is 90 degrees, this setting solution can increase the amount of outgoing light at large angles, which increases the range and thus the total energy of outgoing light across the second brightness enhancing film layer 206 to some extent.

[0080] By increasing the range of emitted light across the first brightness enhancing film layer 205 and increasing the total energy, the viewing angle of the liquid crystal display 001 in the direction perpendicular to L1 can be increased, and by increasing the range of emitted light across the second brightness enhancing film layer 206 and increasing the total energy, the viewing angle of the liquid crystal display 001 in the direction perpendicular to L2 can be increased. This improves the brightness uniformity across the liquid crystal display 001 and increases the viewing angle at a specific brightness.

[0081] In the following, the first brightness enhancing film layer 205 will be taken as an example to explain the principle that when the apex angle of the first brightness enhancing film layer 205 is greater than 90 degrees, the amount of emitted light at a large angle can be increased and the range of emitted light of the entire first brightness enhancing film layer 205 can be expanded to some extent.

[0082] 4b is a diagram of light propagation in a first brightness enhancing film layer 205 with separate apex angles of 90 degrees and greater than 90 degrees according to an embodiment of the present application. A cross section of the first brightness enhancing film layer 205 with an apex angle of 90 degrees is shown in solid lines, and a cross section of the first brightness enhancing film layer 205 with an apex angle greater than 90 degrees is shown in dashed lines.

[0083] As shown in FIG. 4b, assume that the total reflection angle of the first brightness enhancement film layer 205 of the prism is B1. For example, B1 is 45 degrees, the apex angle of the first brightness enhancement film layer is 90 degrees, and the base angle of the first brightness enhancement film layer is 45 degrees. There is a large amount of light. When light enters the first light exit surface 2054, the light is totally reflected at the second light exit surface 2055, and then totally reflected from the second light exit surface 2055 toward the light source. This causes light energy loss.

[0084] For example, when light i1 is incident on the first light exit surface 2054 of the first brightness enhancement film layer 205 at an incident angle B1, i.e., 45 degrees, the light i1 is totally reflected at the second light exit surface 2055 and then totally reflected from the second light exit surface 2055 towards the light source.

[0085] However, when the apex angle of the first brightness enhancing film layer 205 becomes larger, when light i2 is incident on the first light output surface 2054 of the first brightness enhancing film layer 205 in a direction parallel to i1 at a larger apex angle, the incident angle B2 of light i2 becomes smaller relative to the incident angle B1 of i1. In this way, the light i2 is refracted at the first light output surface 2054 instead of being totally reflected.

[0086] Therefore, when the apex angle of the first brightness enhancing film layer 205 is greater than 90 degrees, the amount of emitted light at large angles can be increased, and the range and total energy of the emitted light of the entire first brightness enhancing film layer 205 can be broadened and increased to a certain extent.

[0087] In some embodiments, the apex angle of the first brightness enhancing film layer and the apex angle of the second brightness enhancing film layer may be an acute angle as shown in FIG. 4a, or in some embodiments, may be an arc angle having a particular radian.

[0088] In this embodiment of the present application, when the apex angle of the first brightness enhancing film layer and the apex angle of the second brightness enhancing film layer are arc angles having a certain radian, the radius of curvature of the apex angle of the first brightness enhancing film layer and the apex angle of the second brightness enhancing film layer can be 16 μm or less.

[0089] In some embodiments, the included angle between the axial direction L1 of the first brightness enhancing film layer 205 and the axial direction L2 of the second brightness enhancing film layer 206 may alternatively be set to be greater than 90 degrees, for example, between 140 degrees and 180 degrees. Similarly, the amount of light reflected back to the light source may be reduced and the amount of emitted light at large angles may be increased to expand the range and somewhat increase the total energy of emitted light across the brightness enhancing film structure layers.

[0090] FIG. 5 is a simulation diagram of the light field distribution of a backlight structure according to an embodiment of the present application, in which the first brightness enhancing film layer 205 and the second brightness enhancing film layer 206 have the same structure, the axial included angles between the first brightness enhancing film layer 205 and the second brightness enhancing film layer 206 are different, and the first brightness enhancing film layer 205 corresponds to a different base angle.

[0091] In FIG. 5, the horizontal coordinate is the sine value of the included angle between the axial direction of the first brightness enhancement film layer 205 and the axial direction of the second brightness enhancement film layer 206, and indicates the included angle range of 0 degrees to 90 degrees, and the vertical coordinate is the base angle of the first brightness enhancement film layer 205, and the coordinate range is 10 degrees to 70 degrees. In the figure, the black grid indicates that the front brightness of the backlight structure is greater than 80% of the standard brightness. The gray grid indicates that the L75 viewing angle is greater than ±30 degrees, where L75 indicates 75% of the maximum front brightness, and the L75 viewing angle is greater than ±30 degrees indicates that the viewing angle range of 75% of the front brightness is greater than the deflection range of the front line of sight of 30 degrees.

[0092] 5, it can be seen that when the base angle range of the first brightness enhancing film layer 205 is 31 degrees to 37 degrees, and the axial included angle between the first brightness enhancing film layer 205 and the second brightness enhancing film layer 206 is within the range of 0 degrees to 80 degrees, the front brightness of the backlight structure can be greater than 80% of the standard brightness, and the viewing angle range of 75% of the front brightness is greater than the deflection range of 30 degrees of the front line of sight. This shows that the solution provided in this embodiment of the present application can increase the viewing angle of the liquid crystal display.

[0093] 6 is a diagram of the backlight light field distribution of the backlight structure according to an embodiment of the present application. From FIG. 6, it can be seen that when the base angle range of the first brightness enhancement film layer 205 is 31 degrees to 37 degrees, and the axial included angle between the first brightness enhancement film layer 205 and the second brightness enhancement film layer 206 is within the range of 0 degrees to 80 degrees, the front brightness of the backlight structure can be greater than 80% of the standard brightness, and the viewing angle range of 75% of the front brightness is greater than or equal to 30 degrees deflection range of the front line of sight (L75 viewing angle is greater than ±30 degrees). The viewing angle range of 50% of the front brightness is greater than or equal to 40 degrees deflection range of the front line of sight (L50 viewing angle is greater than ±40 degrees).

[0094] It will be understood that the cross-sections or sections of the prismatic posts referred to in the embodiments of this application are sections perpendicular to the axial direction of the prismatic posts or prismatic film layers.

[0095] In the solution of another embodiment, in order to further improve the uniformity of the emitted light in this embodiment of the present application, an embodiment of the present application provides another backlight structure. The prism pillars of one brightness enhancement film layer in the backlight structure are arranged as prism pillars of a circular arc-shaped column structure. It should be noted that in this embodiment of the present application, the cross section of the circular arc-shaped column structure is a column structure whose cross section is a circular arc surface, and the circular arc surface may be a semicircular surface, or a circular arc surface that is larger or smaller than a semicircle. That is, the outline of the cross section of the circular arc-shaped column structure is surrounded by a straight line and a circular arc line connected to the head and end of the straight line. FIG. 7 is a diagram of a brightness enhancement film structure layer according to an embodiment of the present application. As shown in FIG. 7, the brightness enhancement film structure layer includes a first brightness enhancement film layer 205 and a second brightness enhancement film layer 206. The first brightness enhancement film layer 205 and the second brightness enhancement film layer 206 are stacked. The first brightness enhancement film layer 205 may be arranged below the second brightness enhancement film layer 206.

[0096] As shown in FIG. 7, the first brightness enhancing film layer 205 includes a first substrate 2051 and a first prism pillar layer connected to the top surface of the first substrate 2051, the first prism pillar layer includes a plurality of first prism pillars 2052 arranged in parallel. The first prism pillars 2052 are triangular prisms. Each of the plurality of first prism pillars 2052 includes a first contact surface 2053 connected to the substrate, and a first light output surface 2054 and a second light output surface 2055 adjacent to the first contact surface 2053. The straight lines on which the edges corresponding to each first contact surface 2053 of each of the plurality of first prism pillars 2052 are located are parallel. In some embodiments, the first light output surface 2054 and the second light output surface 2055 may be light output surfaces of the same size.

[0097] For ease of explanation, in this embodiment of the present application, the included angle between the first light exit surface 2054 and the first contact surface 2053 is defined as the base angle of the first brightness enhancement film layer 205, the included angle between the first light exit surface 2054 and the second light exit surface 2055 is defined as the apex angle of the first brightness enhancement film layer 205, and the extension direction of each connection edge between the first light exit surface 2054 and the second light exit surface 2055 of the first prism pillar 2052 is defined as the axial direction L1 of the first brightness enhancement film layer 205.

[0098] The second brightness enhancing film layer 206 includes a second substrate 2061 and a second prism column layer connected to the lower surface of the second substrate 2061. The second prism column layer includes a plurality of second prism columns 2062 arranged in parallel. The cross section of each of the plurality of second prism columns 2062 is an arc, and the arc is an image surrounded by a line segment of the arc and a straight line. The line segment of the arc may be a portion of an arc of a whole circle, and the straight line segment may be a chord corresponding to the line segment of the arc.

[0099] In this embodiment of the application, the first prism posts 2052 of the first brightness enhancing film layer 205 are disposed opposite the second prism posts 2062 of the second brightness enhancing film layer 206. The first prism posts 2052 of the first brightness enhancing film layer 205 may be connected to the second prism posts 2062 of the second brightness enhancing film layer 206 using an optical adhesive.

[0100] In this embodiment of the present application, the second prism post 2062 includes a second contact surface 2063 connected to the substrate. The second contact surface 2063 may be rectangular.

[0101] In this embodiment of the present application, the included angle between the end point tangent of the connection line between the arc-shaped cross section of the second prism rod 2062 and the second substrate 2061 and the connection line may be defined as the base angle of the second prism rod 2062. The central angle corresponding to the arc in the arc-shaped cross section of the second prism rod 2062 is defined as the apex angle of the second prism rod 2062. The direction perpendicular to the arrangement direction of the multiple second prism rods 2062 in the second brightness enhancing film layer is defined as the axial direction L2 of the second brightness enhancing film layer 206.

[0102] In some embodiments, the first prism pillars 2052 of the first brightness enhancing film layer 205 may alternatively be connected to the second substrate of the second brightness enhancing film layer 206, i.e., the second prism pillars 2062 of the second brightness enhancing film layer 206 are disposed on the top surface of the second brightness enhancing film layer 206.

[0103] In this embodiment of the present application, the included angle between the axial direction L1 of the first brightness enhancing film layer 205 and the axial direction L2 of the second brightness enhancing film layer may be 90 degrees.

[0104] In this embodiment of the present application, the brightness enhancement film structure layer provided in FIG. 7 can effectively improve the uniformity of the output light of the brightness enhancement film structure layer, and expand the angle range of the output light of the brightness enhancement film structure layer to a certain extent.

[0105] 8, the cross section of the second prism column 2062 is an arc shape, and when multiple parallel beams of light i1, i2, i3, i4, i5, i6 are incident on the edge line of the cross section, the corresponding beams of output light i11, i21, i31, i41, i51, i61 are in different directions, and the light output direction is dispersed. This can improve the uniformity of the output light of the brightness enhancement film structure layer, and can expand the angle range of the output light of the brightness enhancement film structure layer to a certain extent.

[0106] As shown in Fig. 9, the cross-sectional shape of the second prism column 2062 is a triangle. Take the cross-section as an example. When multiple parallel beams of light i1, i2, i3 are incident on one side 301 of the cross-section, it can be understood that the corresponding beams of output light i11, i21, i31 are arranged in parallel and are focused to output light in the direction of the apex angle of the triangle. When multiple parallel beams of light i4, i5, i6 are incident on the other side 302 of the cross-section, the corresponding beams of output light i41, i51, i61 are also arranged in parallel and are focused to output light in the direction of the apex angle of the triangle. Therefore, the light output direction is concentrated, and as a result, the uniformity of the output light of the brightness enhancement film structure layer is poor.

[0107] In some embodiments, in order to obtain a prismatic film structure layer having a wider angular range of emitted light, the angle range of the base angle of the first brightness enhancing film layer 205 may be 37 degrees to 55 degrees, i.e., the angle range of the apex angle may be 70 degrees to 106 degrees.

[0108] The angle range of the apex angle of the second brightness enhancing film layer 206 may be 64 degrees to 70 degrees, that is, the angle range of the base angle may be 55 degrees to 58 degrees.

[0109] In some embodiments, the radius of curvature of the apex angle of the first brightness enhancing film layer may be 8 μm or less, and the radius of curvature of the apex angle of the second brightness enhancing film layer may be 24 μm or less.

[0110] FIG. 10 is a simulation diagram of the light field distribution of the backlight structure when the brightness enhancement film structure layer in this embodiment of the present application is the structure shown in FIG. 7, the included angle between the axial direction L1 of the first brightness enhancement film layer 205 and the axial direction L2 of the second brightness enhancement film layer is 90 degrees, and the first brightness enhancement film layer 205 and the second brightness enhancement film layer 206 correspond to different base angles.

[0111] In Fig. 10, the horizontal coordinate is the base angle of the first brightness enhancement film layer 205, and the base angle ranges from 0 degrees to 90 degrees, and the vertical coordinate is the base angle of the second brightness enhancement film layer 206, and the base angle ranges from 10 degrees to 70 degrees. In the figure, the black grid indicates that the front brightness of the backlight structure is greater than 80% of the standard brightness. The gray grid indicates that the L75 viewing angle is greater than ±30 degrees, and L75 is 75% of the maximum front brightness, indicating that the viewing angle range of 75% of the front brightness is greater than the front line of sight deflection range of 30 degrees.

[0112] 10, it can be seen that when the base angle range of the first brightness enhancing film layer 205 is 37 degrees to 55 degrees and the apex angle of the second brightness enhancing film layer 206 is 64 degrees to 70 degrees, the front brightness of the backlight structure can be greater than 80% of the standard brightness, and the viewing angle range of 75% of the front brightness is greater than or equal to 30 degrees of front line of sight deviation, which indicates that the solution provided in this embodiment of the present application can increase the viewing angle of the liquid crystal display.

[0113] FIG. 11 is a light field distribution diagram of the backlight structure when the brightness enhancement film structure layer in this embodiment of the present application is the structure shown in FIG. 7, the included angle between the axial direction of the first brightness enhancement film layer 205 and the axial direction of the second brightness enhancement film layer is 90 degrees, and the first brightness enhancement film layer 205 and the second brightness enhancement film layer 206 correspond to different base angles.

[0114] From Fig. 11, it can be seen that when the base angle range of the first brightness enhancing film layer 205 is 37 degrees to 55 degrees and the apex angle of the second brightness enhancing film layer 206 is 64 degrees to 70 degrees, the front brightness of the backlight structure can be greater than 75% of the standard brightness, and the viewing angle range of 75% of the front brightness is greater than or equal to a 40 degree deflection range of the front line of sight (L75 viewing angle is greater than ±40 degrees). The viewing angle range of 50% of the front brightness is greater than or equal to a 40 degree deflection range of the front line of sight. The L75 viewing angle is ±55 degrees (L50 viewing angle is greater than ±55 degrees).

[0115] In some embodiments, as shown in Figure 12, the base angle of the plurality of second prism pillars 2062 in the second brightness enhancing film layer 206 may be gradually reduced from the center of the first substrate 2051 to the second prism pillars 2062 at the edge. In this way, the angle of the exiting light of the second prism pillars at the edge of the second brightness enhancing film layer 206 may be small. This can reduce the amount of light exiting to the side of the second brightness enhancing film layer, and reduce the light energy loss.

[0116] In some embodiments, the base angles of the plurality of second prism posts 2062 in the first brightness enhancing film layer 205 may also become gradually smaller in a direction from the center of the first substrate 2061 towards the edge prism posts.

[0117] In some embodiments, an embodiment of the present application further provides a brightness enhancement film structure layer. The structure of the brightness enhancement film structure layer is similar to that of Fig. 7, except that the first prism pillars 2052 in the first brightness enhancement film layer 205 are also prism pillars whose cross section can be arc-shaped.

[0118] In some embodiments, the brightness enhancement film structure layer of the backlight structure may alternatively include only one third brightness enhancement film layer. FIG. 13a is a diagram showing the structure of the brightness enhancement film structure layer. As shown in FIG. 13a, the third brightness enhancement film layer 207 includes a third substrate 2071 and a third optical film layer disposed on the upper surface of the third substrate 2071, and the third prism column layer includes a plurality of third prism columns 2072 arranged in parallel. The cross section of each of the plurality of third prism columns 2072 is an arc, and the arc is an image surrounded by a line segment of the arc and a straight line. The line segment of the arc may be a part of the arc of the whole circle. The line segment of the straight line may be a chord corresponding to the line segment of the arc.

[0119] The third substrate 2071 of the third prism film layer 207 is connected to the color conversion film layer 204 .

[0120] In this embodiment of the present application, the included angle between the end tangent of the connection line between the arc-shaped cross section of the third prism rod 2072 and the third substrate 2071 and the connection line may be defined as the base angle of the third prism rod 2072. The central angle corresponding to the arc in the arc-shaped cross section of the third prism rod 2072 is defined as the apex angle of the third prism rod 2072.

[0121] In some embodiments, as shown in FIG. 13b, the cross section of each of the plurality of third prism pillars 2072 of the third brightness enhancing film layer 207 may alternatively be triangular, i.e., the third prism pillars 2072 may be triangular prisms. Each of the plurality of third prism pillars 2072 includes a third contact surface 2073 connected to the third substrate 2071, and a fifth light exit surface 2074 and a sixth light exit surface 2075 adjacent to the third contact surface 2073. The straight lines on which the edges corresponding to each first contact surface 2073 of each of the plurality of third prism pillars 2072 are located are parallel. In some embodiments, the fifth light exit surface 2074 and the sixth light exit surface 2075 may be light exit surfaces of the same size.

[0122] For ease of explanation, in this embodiment of the application, the included angle between the fifth light exit surface 2074 and the third contact surface 2073 is defined as the base angle of the third prism column 2072, and the included angle between the fifth light exit surface 2074 and the sixth light exit surface 2075 is defined as the apex angle of the third prism column 2072.

[0123] In some embodiments, the third prism pillars in the third brightness enhancing film layer 207 may have the same structure, and the radius of curvature of the apex angle of the third brightness enhancing film layer may range from 5 μm to 24 μm. The base angle of the third brightness enhancing film layer 205 may range from 31 degrees to 58 degrees, i.e., the apex angle may range from 64 degrees to 118 degrees.

[0124] In some embodiments, the apex angle of the multiple third prism posts in the third brightness enhancing film layer 207 gradually increases in the direction from the center of the third brightness enhancing film layer 207 to the third prism posts 2072 at the edge.

[0125] FIG. 14 is a simulation diagram of the light field distribution of the backlight structure when the brightness enhancement film structure layer in this embodiment of the present application is the structure shown in FIG. 13a, and the third brightness enhancement film layer corresponds to different base angles and different curvature radii.

[0126] In FIG. 14, the horizontal coordinate is the base angle of the third brightness enhancement film layer, and the base angle ranges from 0 degrees to 90 degrees, and the vertical coordinate is the radius of curvature of the apex angle, and the radius of curvature ranges from 0 μm to 136 μm. In the figure, the black grid indicates that the front brightness of the backlight structure is greater than 80% of the standard brightness. The gray grid indicates that the L75 viewing angle is greater than ±30 degrees, and L75 is 75% of the maximum front brightness, and the viewing angle range of 75% of the front brightness is greater than 30 degrees of deflection of the front line of sight.

[0127] From FIG. 14, it can be seen that when the base angle range of the third brightness enhancing film layer 205 is 31 degrees to 58 degrees, the front brightness of the backlight structure can be greater than 80% of the standard brightness, and the viewing angle range of 75% of the front brightness is a front line of sight deflection range of 30 degrees or more.

[0128] FIG. 15 is a simulation diagram of the light field distribution of the backlight structure when the brightness enhancement film structure layer in this embodiment of the present application is the structure shown in FIG. 13a, and the third brightness enhancement film layer corresponds to the curvature radius of different base angles and different apex angles.

[0129] From Fig. 15, it can be seen that when the base angle of the third brightness enhancing film layer is in the range of 31 degrees to 58 degrees, that is, the apex angle is in the range of 64 degrees to 118 degrees, and the curvature radius of the apex angle is in the range of 5μm to 24μm, the front brightness of the backlight structure can be greater than 75% of the standard brightness, and the viewing angle range of 75% of the front brightness is greater than or equal to 35 degrees in the front line of sight deflection range (L75 viewing angle is greater than ±35 degrees). The viewing angle range of 50% of the front brightness is greater than or equal to 40 degrees in the front line of sight deflection range (L50 viewing angle is greater than ±40 degrees).

[0130] It is understood that in this embodiment of the present application, the two base angles of the first brightness enhancing film layer 205, the second brightness enhancing film layer 206, or the third brightness enhancing film layer 207 may not be exactly the same. In practice, the difference between the two base angles may be 0 degrees to 3 degrees.

[0131] It will be appreciated that in some embodiments, the first prism pillars in the first prism pillar layer in the first brightness enhancing film layer 205 may not have a uniform shape. For example, in the first prism pillar layer, some of the first prism pillars may be arranged to have an arc-shaped pillar structure, and other some of the first prism pillars may be arranged to have a triangular prism structure.

[0132] In some embodiments, the first brightness enhancing film layer 205 may be divided into a middle region and a first edge region and a second edge region disposed on both sides of the middle region. The first prism pillars 2052 in the middle region may be arc-shaped pillar structures, and the first prism pillars 2052 in the first edge region and the first prism pillars 2052 in the second edge region may be triangular prism structures. The angle range corresponding to the arc in the cross section of the first prism pillars in the middle region may be 64 degrees to 70 degrees. The apex angle of the first prism pillars 2052 in the first edge region and the second edge region may be 90 degrees.

[0133] Since the arc-shaped structure has a larger light spreading angle, the first prism pillars 2052 in the middle region are arranged as arc-shaped pillar structures, so that the output angle range of the first brightness enhancement film layer 205 can be effectively expanded. The light spreading angle of the triangular prism structure with a 90-degree apex angle is small. Therefore, the first prism pillars 2052 in the first edge region and the second edge region may be arranged as triangular prisms with a 90-degree apex angle. This can prevent a lot of light from being output from the edge region of the first brightness enhancement film layer 205, and reduce light energy loss.

[0134] In some embodiments, the division of the middle region, the first edge region, and the second edge region may be set based on practical requirements. For example, the region where the first prism pillars 2052 are located at one end edge of the first brightness enhancing film layer 205 is used as the first edge region, the region where the first prism pillars 2052 are located at the other end edge of the first brightness enhancing film layer 205 is used as the second edge region, and the region between the first edge region and the second edge region of the first brightness enhancing film layer 205 is used as the middle region.

[0135] It will be appreciated that the second brightness enhancing film layer 206 and the third brightness enhancing film layer 207 may be arranged such that the prism posts in the first brightness enhancing film layer 205 may not be of uniform shape, and details will not be repeated here.

[0136] In conclusion, the backlight structure provided in this embodiment of the present application can effectively improve the uniformity of the output light of the brightness enhancement film structure layer and expand the angle range of the output light of the brightness enhancement film structure layer.

[0137] Another aspect of an embodiment of the present application provides a liquid crystal display including a display component and a backlight structure as described above.

[0138] It will be appreciated that the electronic device in an embodiment of the present application may alternatively be a device such as a liquid cooling cabinet.

[0139] References to "one embodiment," "some embodiments," and the like described herein mean that one or more embodiments of the application include the particular feature, structure, or characteristic described with reference to the embodiment. Thus, statements such as "in one embodiment," "in some embodiments," "in some other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily mean to refer to the same embodiment. Instead, these statements mean "one or more, but not all, embodiments," unless specifically emphasized otherwise. The terms "including," "comprising," "having," and all variations thereof mean "including, but not limited to," unless specifically emphasized otherwise.

[0140] The above description is merely a specific embodiment of the present application, and is not intended to limit the scope of protection of the present application. Any variations or replacements that are easily conceived by those skilled in the art within the technical scope disclosed in the present application shall be within the scope of protection of the present application. When no contradiction occurs, the embodiments and features of the embodiments of the present application may be combined with each other. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims. [Explanation of symbols]

[0141] 001 LCD display 100 display screens 200 Backlight Structure 101 Wide viewing angle film 1011 First Base 1012 Second Base 1013 Functional Layer 1014 Connection Layer 201 Light source layer 202 Diffusion Layer 203 Spectral selective transmission film layer 204 Color conversion film layer 205 First Brightness Enhancement Film 2051 First board 2052 First Prism Pillar 2053 First Contact Surface 2054 First light exit surface 2055 Second light exit surface 206 Second Brightness Enhancement Film Layer 2061 Second board 2062 Second Prism Pillar 2063 Second Contact Surface 2064 Third light exit surface 2065 4th light exit surface 207 Third Brightness Enhancement Film Layer 2071 Third Board 2072 Third Prism Pillar

Claims

1. A backlight structure comprising a light source layer, an optical function structure layer, and a brightness enhancement film structure layer, wherein the light source layer, the optical function structure layer, and the brightness enhancement film structure layer are stacked in a first direction; the brightness enhancing film structure layer comprises at least one brightness enhancing film layer, each of the at least one brightness enhancing film layer comprising a substrate and a prism post layer stacked and connected together; The prism pillar layer comprises at least one protrusion structure disposed on the substrate. Backlight structure.

2. The backlight structure according to claim 1 , wherein the at least one protrusion structure includes an arc-shaped protrusion structure and / or an angular protrusion structure.

3. The arc-shaped protrusion structure is a dot-type arc-shaped protrusion structure, a strip-type arc-shaped protrusion structure, or a multi-segment arc-shaped protrusion structure; The horn-shaped protrusion structure is a dot-shaped horn-shaped protrusion structure, a strip-shaped horn-shaped protrusion structure, and a multi-segment horn-shaped protrusion structure. The backlight structure according to claim 2 .

4. The at least one brightness enhancing film layer particularly comprises a first brightness enhancing film layer and a second brightness enhancing film layer stacked in the first direction; the first brightness enhancement film layer comprises a first substrate and a first prism pillar layer which are stacked and connected together, the first prism pillar layer comprises a plurality of first prism pillars connected in parallel, and the plurality of first prism pillars connected in parallel are all prism structures; the second brightness enhancement film layer comprises a second substrate and a second prism column layer which are stacked and connected together, the second prism column layer comprises a plurality of second prism columns connected in parallel, and the plurality of second prism columns connected in parallel all have an arc-shaped column structure; A backlight structure according to any one of claims 1 to 3.

5. The first substrate is connected to the optically functional structure layer; the first substrate, the first prism column layer, the second prism column layer, and the second substrate are stacked in the first direction; or the first substrate, the first prism column, the second substrate, and the second prism column layer are stacked in the first direction. The backlight structure according to claim 4 .

6. The backlight structure according to claim 5 , wherein an included angle between an axial direction of the first prism pillar and an axial direction of the second prism pillar is 90 degrees.

7. 7. The backlight structure of claim 4, wherein the second prism pillars in the second prism pillar layer are structures of the same size.

8. 8. The backlight structure according to claim 7, wherein the central angle corresponding to the arc in the cross section of the second prism column has an angular range of 64 degrees to 70 degrees.

9. The backlight structure according to claim 6 , wherein a radius of curvature corresponding to the arc in the cross section of the second prism rod is 24 μm or less.

10. 5. The backlight structure of claim 4, wherein a central angle corresponding to an arc in a cross section of the plurality of second prism pillars of the second prism pillar layer gradually increases in a direction from a center position of the second prism pillar layer toward a second prism pillar at an edge portion.

11. 10. The backlight structure of claim 4, wherein the first prism pillars in the first prism pillar layer are structures of the same size.

12. the first prism pillar comprises a first contact surface connected to the first substrate, and a first light exit surface and a second light exit surface connected to the first contact surface; The included angle between the first light output surface and the first contact surface is 37 degrees to 55 degrees, and the included angle between the second light output surface and the first contact surface is 37 degrees to 55 degrees. The backlight structure according to claim 11.

13. 11. The backlight structure of claim 4, wherein the apex angles of the first prism pillars in the first prism pillar layer, which face the first substrate, gradually increase in the direction from the central position of the second prism pillar layer to the edge second prism pillars.

14. The at least one brightness enhancing film layer particularly comprises a first brightness enhancing film layer and a second brightness enhancing film layer stacked in the first direction; the first brightness enhancement film layer comprises a first substrate and a first prism column layer which are stacked and connected together, the first prism column layer comprises a plurality of first prism columns connected in parallel, and the plurality of first prism columns connected in parallel all have an arc-shaped column structure; the second brightness enhancement film layer comprises a second substrate and a second prism column layer which are stacked and connected together, the second prism column layer comprises a plurality of second prism columns connected in parallel, and the plurality of second prism columns connected in parallel all have an arc-shaped column structure; The backlight structure according to claim 1 .

15. the at least one brightness enhancing film layer comprises a third brightness enhancing film layer; the third brightness enhancement film layer comprises a third substrate and a third prism column layer which are stacked and connected together, the third prism column layer comprises a plurality of third prism columns connected in parallel, and the plurality of second prism columns connected in parallel are all arc-shaped column structures; The backlight structure according to claim 1 .

16. The backlight structure of claim 15 , wherein the third prism pillars in the third prism pillar layer are structures of the same size.

17. 17. The backlight structure according to claim 16, wherein the central angle corresponding to the arc in the cross section of the third prism column has an angular range of 64 degrees to 118 degrees.

18. 17. The backlight structure of claim 16, wherein a radius of curvature corresponding to the arc in the cross section of the third prism pillar is 5 μm to 24 μm.

19. 16. The backlight structure of claim 15, wherein a central angle corresponding to an arc in a cross section of the plurality of third prism pillars of the third prism pillar layer gradually increases in a direction from a central position of the third prism pillar layer toward a second prism pillar at an edge.

20. The at least one brightness enhancing film layer particularly comprises a first brightness enhancing film layer and a second brightness enhancing film layer stacked in the first direction; the first brightness enhancement film layer comprises a first substrate and a first prism pillar layer which are stacked and connected together, the first prism pillar layer comprises a plurality of first prism pillars connected in parallel, and the plurality of first prism pillars connected in parallel are all prism structures; the second brightness enhancement film layer comprises a second substrate and a second prism pillar layer which are stacked and connected together, the second prism pillar layer comprises a plurality of second prism pillars connected in parallel, and the plurality of second prism pillars connected in parallel are all prism structures; The backlight structure according to claim 1 .

21. The first substrate is connected to the optically functional structure layer; the first substrate, the first prism column layer, the second prism column layer, and the second substrate are stacked in the first direction; or the first substrate, the first prism column, the second substrate, and the second prism column layer are stacked in the first direction.

21. The backlight structure of claim 20.

22. 21. The backlight structure of claim 20, wherein an included angle between an axial direction of the first prism pillar and an axial direction of the second prism pillar is greater than 90 degrees.

23. the first prism pillar comprises a first contact surface connected to the first substrate, and a first light output surface and a second light output surface connected to the first contact surface, the included angle between the first light output surface and the first contact surface is 37 degrees to 55 degrees, and the included angle between the second light output surface and the first contact surface is in an angle range of 37 degrees to 55 degrees; the second prism pillar comprises a second contact surface connected to the second substrate, and a third light output surface and a fourth light output surface connected to the second contact surface, the included angle between the third light output surface and the fourth contact surface is 37 degrees to 55 degrees, and the angle range of the included angle between the third light output surface and the second contact surface is 37 degrees to 55 degrees; 22. The backlight structure of claim 21.

24. the prism column layer includes a first edge region, a second edge region, and a middle region, the middle region being sandwiched between the first edge region and the second edge region; The prism pillars in the intermediate region are arc-shaped pillar structures, and the prism pillars in the first edge region and the second edge region are prism structures. The backlight structure according to claim 1 .

25. 25. The backlight structure of claim 4, wherein the prism structures include triangular prism structures or trapezoidal prism structures.

26. 20. The backlight structure of claim 2, wherein the arc-shaped columnar structure comprises a semi-circular columnar structure or a semi-elliptical columnar structure.

27. 27. The backlight structure of claim 1, wherein the optically functional structure layer includes a light diffusion layer, a light selective transmission layer, and a color conversion film layer stacked in the first direction.

28. 28. A display comprising a display component and a backlight structure according to any one of claims 1 to 27, wherein the display component is disposed on a surface of a brightness enhancing film structure layer in a first direction.

29. 30. An electronic device comprising a display according to claim 28.

Images