Backlight structures, displays, and electronic devices

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 China National Intellectual Property Administration on December 31, 2021, which is incorporated herein by reference in its entirety.

[0002] This application relates to the field of display technology, and particularly to backlight structures, displays, and electronic devices.

Background Art

[0005] However, the aforementioned technical solution adds a wide-viewing-angle film 101, and because the wide-viewing-angle film 101 absorbs some light, a certain loss of brightness occurs. In addition, the light emitted by the backlight structure is scattered a second time by the wide-viewing-angle film, and some of the light from one pixel is scattered to adjacent pixels. This causes optical crosstalk in the displayed image, resulting in a decrease in image quality. [Overview of the project] [Means for solving the problem]

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

[0007] According to a first aspect, one embodiment of the present application provides a backlight structure including a light source layer, an optical functional structure layer, and a brightness-enhancing film structure layer, wherein the light source layer, the optical functional structure layer, and the brightness-enhancing film structure layer are laminated in a first direction.

[0008] The brightness-enhancing film structure layer includes at least one brightness-enhancing film layer, each of which includes a laminated and connected substrate and prism column layer.

[0009] The prism column layer includes at least one protruding structure placed on the substrate.

[0010] In possible embodiments of the first aspect, at least one projection structure includes an arc-shaped projection structure and / or a horn-shaped projection structure.

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

[0012] The horn-like structures include dot-shaped horn-like structures, strip-shaped horn-like structures, and multi-segmented horn-like structures.

[0013] In this embodiment of the present application, it will be understood that the strip-type arc-shaped projection may be an arc-shaped column structure as described later. The strip-type angular projection includes a prism structure, and the prism structure includes a triangular prism structure, a trapezoidal prism structure, or other prism structures.

[0014] In this embodiment of the present application, it will be understood that the structure of the brightness-enhancing film structure layer of the backlight structure within the display is designed. Specifically, the multiple prism columns in the brightness-enhancing film layer are arranged as prism columns of either an arc-shaped column structure or an angular prism structure. In this way, the emission angle of the brightness-enhancing film structure layer can be effectively increased without adding a wide-viewing-angle film. This makes it possible to improve the overall brightness of the display when viewed from a wide viewing angle, thereby enabling wide-viewing-angle display of the display.

[0015] In a possible embodiment of the first aspect, at least one brightness-enhancing film layer particularly includes a first brightness-enhancing film layer and a second brightness-enhancing film layer laminated in a first direction.

[0016] The first brightness-enhancing film layer includes a first substrate and a first prism column layer that are laminated and connected, the first prism column layer includes a plurality of first prism columns connected in parallel, and all of the plurality of first prism columns connected in parallel are prism structures.

[0017] The second brightness-enhancing film layer includes a laminated and connected second substrate and a second prism column layer, the second prism column layer includes a plurality of second prism columns connected in parallel, and all of the plurality of second prism columns connected in parallel have an arc-shaped column structure.

[0018] In this embodiment of the present application, it will be understood that the second prism column in the second brightness-enhancing film layer is arranged as an arc-shaped column structure. This effectively improves the uniformity of the emitted light from the brightness-enhancing film structure layer and broadens the angular range of the emitted light from the brightness-enhancing film structure layer to some extent.

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

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

[0021] In a possible embodiment of the first aspect, the angle between the axis direction of the first prism column and the axis direction of the second prism column is 90 degrees.

[0022] In a possible embodiment of the first aspect, the multiple second prism columns within the second prism column layer are 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 column is 64 to 70 degrees.

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

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

[0026] In this embodiment of the present application, the bottom angles of the plurality of second prism pillars in the second brightness enhancement film layer Second prism column layer It will be understood that they may gradually decrease in the direction from the center to the second prism pillar at the edge. Thus, the angle of the emitted light of the second prism pillar at the edge of the second brightness enhancement film layer may be small. Thereby, the amount of light emitted to the side surface of the second brightness enhancement film layer can be reduced, and the light energy loss can be reduced.

[0027] In a possible embodiment of the first aspect, the plurality of first prism pillars in the first prism pillar layer have the same size structure.

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

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

[0030] In a possible embodiment of the first aspect, the apex angle of the plurality of first prism pillars in the first prism pillar layer, which faces the first substrate, gradually increases in the direction from the central position of the second prism pillar layer to the second prism pillar at the edge.

[0031] In this embodiment of the present application, the apex angles of the plurality of first prism columns, the apex angles facing the first substrate, are set to gradually increase in the direction from the central position of the second prism column layer toward the edge of the second prism column, so that the angle of light emitted from the first prism columns at the edge of the first brightness-enhancing film layer is small. This reduces the amount of light emitted toward the side of the first brightness-enhancing film layer and reduces light energy loss.

[0032] In a possible embodiment of the first aspect, at least one brightness-enhancing film layer particularly includes a first brightness-enhancing film layer and a second brightness-enhancing film layer laminated in a first direction.

[0033] The first brightness-enhancing film layer includes a first substrate and a first prism column layer that are laminated and connected, and the first prism column layer includes a plurality of first prism columns connected in parallel, and all of the plurality of first prism columns connected in parallel have an arc-shaped column structure.

[0034] The second brightness-enhancing film layer includes a laminated and connected second substrate and a second prism column layer, the second prism column layer includes a plurality of second prism columns connected in parallel, and all of the plurality of second prism columns connected in parallel have an arc-shaped column structure.

[0035] In this embodiment of the present application, both the first and second prism columns are arranged to have an arc-shaped column structure. This further widens the angular range of the light emitted from the brightness-enhancing film structure layer.

[0036] In a possible embodiment of the first aspect, at least one brightness-enhancing film layer particularly includes a third brightness-enhancing film layer.

[0037] The third brightness-enhancing film layer includes a laminated and connected third substrate and a third prism column layer, the third prism column layer includes a plurality of third prism columns connected in parallel, and all of the plurality of second prism columns connected in parallel have an arc-shaped column structure.

[0038] In this embodiment of the present application, the brightness-enhancing film structure layer includes only one third brightness-enhancing film layer, and the prism column of the third brightness-enhancing film layer is arranged as an arc-shaped column structure. This reduces costs and widens the angular range of the emitted light from the brightness-enhancing film structure layer.

[0039] In a possible embodiment of the first aspect, the multiple third prism columns within the third prism column layer are 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 column 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 column is 5 μm to 24 μm.

[0042] In a possible embodiment of the first aspect, the central angles corresponding to the arcs in the cross-sections of the multiple third prism columns of the third prism column layer gradually increase in the direction from the center of the third prism column layer toward the second prism columns at the edges.

[0043] In this embodiment of the present application, the central angles corresponding to the arcs in the cross-sections of the multiple third prism columns are set to gradually increase in the direction from the center of the third prism column layer toward the edge of the second prism column, and as a result, the angle of the light emitted from the third prism column toward the edge of the third brightness-enhancing film layer is small. This reduces the amount of light emitted toward the side of the third brightness-enhancing film layer and reduces light energy loss.

[0044] In a possible embodiment of the first aspect, at least one brightness-enhancing film layer particularly includes a first brightness-enhancing film layer and a second brightness-enhancing film layer laminated in a first direction.

[0045] The first brightness-enhancing film layer includes a first substrate and a first prism column layer that are laminated and connected, the first prism column layer includes a plurality of first prism columns connected in parallel, and all of the plurality of first prism columns connected in parallel are prism structures.

[0046] The second brightness-enhancing film layer includes a laminated and connected second substrate and a second prism column layer, the second prism column layer includes a plurality of second prism columns connected in parallel, and all of the plurality of second prism columns connected in parallel have a prism structure.

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

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

[0049] In a possible embodiment of the first aspect, the angle between the axis direction of the first prism column and the axis direction of the second prism column is greater than 90 degrees.

[0050] In this embodiment of the present application, the angle between the axial direction of the first brightness-enhancing film layer and the axial direction of the second brightness-enhancing film layer is also set to be greater than 90 degrees. As a result, the amount of light reflected back to the light source can be reduced, and the amount of emitted light at large angles can be increased. This broadens the range, and the total energy of the emitted light from the entire brightness-enhancing film structure layer increases to some extent.

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

[0052] In a possible embodiment of the first aspect, the first prism column includes a first contact surface connected to a first substrate, and a first and second light-emitting surfaces connected to the first contact surface, wherein the angle between the first light-emitting surface and the first contact surface is 31 to 37 degrees, and the angular range of the angle between the second light-emitting surface and the first contact surface is 31 to 37 degrees.

[0053] The second prism column includes a second contact surface connected to the second substrate, and a third and fourth light-emitting surfaces connected to the second contact surface, wherein the angle between the third light-emitting surface and the fourth contact surface is 31 to 37 degrees, and the angular range of the angle between the third light-emitting surface and the second contact surface is 31 to 37 degrees.

[0054] In this embodiment of the present application, the angular range of the apex angle of each of the first and second brightness-enhancing film layers is set to 106 to 118 degrees, i.e., the angular range of the base angle of the first brightness-enhancing film layer is 31 to 37 degrees. Compared with some embodiments, for example, a solution in which the apex angle of the first brightness-enhancing film layer is 90 degrees, this setting solution can increase the amount of emitted light at larger angles. This broadens the range and increases to some extent the total energy of the emitted light across the entire first brightness-enhancing film layer.

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

[0056] The prism columns in the intermediate region have an arc-shaped column structure, while the prism columns in the first and second edge regions have a prism structure.

[0057] Since an arc-shaped structure has a larger angle of light diffusion, it can be understood that by arranging the prism columns in the intermediate region as an arc-shaped column structure, the emission angle range of the emission brightness-enhancing film layer can be effectively expanded. The angle of light diffusion of a prism structure with an apex angle of 90 degrees is small. Therefore, the prism columns in the first and second edge regions may be arranged as triangular prisms with an apex angle of 90 degrees. This prevents a large amount of light from being emitted from the edge regions of the brightness-enhancing film layer, thereby reducing light energy loss.

[0058] In possible embodiments of the first aspect, the prism structure includes a triangular prism structure or a trapezoidal prism structure.

[0059] In possible embodiments of the first aspect, the arc-shaped column structure includes a semi-cylindrical structure or a semi-elliptical column structure.

[0060] In a possible embodiment of the first aspect, the optical functional structure layer includes a light-diffusing layer, a light-selective transmission layer, and a color-converting film layer, all stacked in a first direction.

[0061] A second embodiment of the present application provides a display including a display component and a backlight structure, wherein the display component is arranged on the surface of a brightness-enhancing film structure layer in a first direction.

[0062] A third embodiment of the present application provides an electronic device including a display. [Brief explanation of the drawing]

[0063] [Figure 1] This is a diagram showing the structure of a liquid crystal display according to several embodiments of this application. [Figure 2] This is a diagram showing the structure of a wide-viewing-angle film according to several embodiments of this application. [Figure 3] This is an exploded view of a backlight structure according to several embodiments of this application. [Figure 4a]This figure shows the structure of the arrangement of a first brightness-enhancing film layer and a second brightness-enhancing film layer according to some embodiments of this application. [Figure 4b] This figure shows light propagation in a first brightness-enhancing film layer having separate apex angles of 90 degrees and greater than 90 degrees, according to some embodiments of the present application. [Figure 5] This is a simulation diagram of the light irradiation field distribution of a backlight structure in which, according to some embodiments of this application, the first brightness-enhancing film layer and the second brightness-enhancing film layer have the same structure, the axial 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 bottom angle. [Figure 6] This figure shows the backlight light field distribution of a backlight structure according to several embodiments of this application. [Figure 7] This is a diagram of a brightness-enhancing film structure layer according to some embodiments of this application. [Figure 8] This figure shows the light propagation of a second brightness-enhancing film layer when the cross-sectional shape of the second prism column is an arc, according to some embodiments of this application. [Figure 9] This diagram shows the light propagation of the second brightness-enhancing film layer when the cross-sectional shape of the second prism column is triangular, according to some embodiments of this application. [Figure 10] This is a simulation diagram of the light irradiation field distribution of a backlight structure when, according to some embodiments of this application, the brightness-enhancing film structure layer has the structure shown in Figure 7, the angle between the axial direction L1 of the first brightness-enhancing film layer and the axial direction L2 of the second brightness-enhancing film layer is 90 degrees, and the first brightness-enhancing film layer and the second brightness-enhancing film layer correspond to different bottom angles. [Figure 11] Figure 7 shows the light irradiation field distribution of a backlight structure when the brightness-enhancing film structure layer, according to some embodiments of this application, has the structure shown, the angle between the axial direction of the first brightness-enhancing film layer and the axial direction of the second brightness-enhancing film layer is 90 degrees, and the first brightness-enhancing film layer and the second brightness-enhancing film layer correspond to different bottom angles. [Figure 12] This is a diagram showing the structure of a second brightness-enhancing film layer according to some embodiments of this application. [Figure 13a] This is a diagram showing the structure of a third brightness-enhancing film layer according to some embodiments of this application. [Figure 13b] This is a diagram showing the structure of a third brightness-enhancing film layer according to some embodiments of this application. [Figure 14] Figure 13a shows a simulation of the light field distribution of a backlight structure when the brightness-enhancing film structure layer, according to some embodiments of this application, has the structure shown, and the third brightness-enhancing film layer corresponds to different bottom angles and different radii of curvature. [Figure 15] This is a simulation diagram of the light field distribution of a backlight structure when the brightness-enhancing film structure layer according to some embodiments of this application has the structure shown in Figure 13a, and the third brightness-enhancing film layer corresponds to different bottom angles and different apex angle radii. [Modes for carrying out the invention]

[0064] The embodiments of this application will be described below using specific embodiments. Those skilled in the art will readily understand the other advantages and effects of this application based on what is disclosed herein. Although this application is described with reference to several embodiments, this does not mean that the characteristics of this application are limited to these embodiments alone. Rather, the purpose of describing this application with reference to embodiments is to cover alternative options or modifications that may be derived in accordance with the claims of this application. For a thorough understanding of this application, the following description includes many specific details. This application may be implemented alternatively without using these details. In addition, some specific details have been omitted from the description to avoid confusion or obscuration of the focus of this application. It should be noted that the embodiments and features of the embodiments of this application may be combined with each other where there is no contradiction.

[0065] In this specification, the same reference numerals and letters in the following accompanying drawings represent the same items. Therefore, once an item is defined in an accompanying drawing, it does not need to be further defined or interpreted in the following accompanying drawings. In the description of this application, orientations or positional relationships indicated by terms such as “center,” “top,” “bottom,” “left,” “right,” “vertical,” “horizontal,” “inside,” and “outside” are orientations or positional relationships based on the accompanying drawings and are intended solely to facilitate and simplify the description of this application, and do not indicate or imply that the described apparatus or element must have a particular orientation, or must be configured and operated in a particular orientation. Therefore, such terms should not be understood as limitations on this application. In addition, the terms “first” and “second” are used for illustrative purposes only and should not be understood as indicating or implying relative importance.

[0066] To clarify the purpose, technical solution, and advantages of this application, embodiments of this application will be described in further detail hereafter with reference to the accompanying drawings.

[0067] To solve the above problems, one embodiment of this application provides a liquid crystal display. The structure of the brightness-enhancing film structure layer of the backlight structure in the liquid crystal display is designed. When a wide-viewing-angle film is not added, the overall brightness of the liquid crystal display is improved when the display is viewed from a wide viewing angle, and a wide-viewing-angle display of the liquid crystal display is realized.

[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-enhancing film layer within the brightness-enhancing film structure layer is set to a specified angle in order to increase the amount of light emitted from a larger angle within the brightness-enhancing film layer, and thus increase the viewing angle of the liquid crystal display and implement a wide viewing angle display of the liquid crystal display. The viewing angle can be understood as the deflectable angle of the user's line of sight relative to the front line of sight to the display screen, when it is guaranteed that the brightness of the display screen being viewed by the user is at a specified brightness.

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

[0071] Figure 4a is a diagram showing the arrangement of the first brightness-enhancing film layer 205 and the 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 laminated, and the first brightness-enhancing film layer 205 may be positioned below the second brightness-enhancing film layer 206.

[0072] As shown in Figure 4a, the first brightness-enhancing film layer 205 includes a first substrate 2051 and a first prism column layer connected to the upper surface of the first substrate 2051, the first prism column layer including a plurality of parallel-arranged first prism columns 2052, the first prism columns 2052 having a triangular prism structure. The triangular prism structure referred to in this embodiment of the present application will be understood to be a column structure having a triangular cross-section. Each side of the plurality of first prism columns 2052 includes a first contact surface 2053 connected to the substrate and a first light-emitting surface 2054 and a second light-emitting surface 2055 adjacent to the first contact surface 2053. The lines along which the edges corresponding to each of the first contact surfaces 2053 of each of the plurality of first prism columns 2052 are located are parallel. In some embodiments, the first light-emitting surface 2054 and the second light-emitting surface 2055 may be light-emitting surfaces of the same size.

[0073] For the sake of clarity, in this embodiment of the present application, the angle between the first light-emitting surface 2054 and the first contact surface 2053 is defined as the bottom angle of the first brightness-enhancing film layer 205, the angle between the first light-emitting surface 2054 and the second light-emitting surface 2055 is defined as the apex angle of the first brightness-enhancing film layer 205, and the extending direction of each connecting edge between the first light-emitting surface 2054 and the second light-emitting surface 2055 of the first prism column 2052 is defined as the axial direction L1 of the first brightness-enhancing film layer 205.

[0074] In this embodiment of the present application, the first substrate 2051 and the plurality of first prism columns 2052, which are arranged in parallel and connected to the upper 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 columns 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 column layer connected to the upper surface of the second substrate 2061. The second prism column layer includes a plurality of parallel second prism columns 2062. The second prism columns 2062 are triangular prisms. Each of the plurality of second prism columns 2062 includes a second contact surface 2063 connected to the second substrate 2061, and a third light-emitting surface 2064 and a fourth light-emitting surface 2065 adjacent to the second contact surface 2063. The lines along which the edges corresponding to each second contact surface 2063 of each of the plurality of second prism columns 2062 are located are parallel.

[0076] In some embodiments, the third light-emitting surface 2064 and the fourth light-emitting surface 2065 may be the same light-emitting surface. For ease of explanation, in this embodiment of the present application, the angle between the third light-emitting surface 2064 and the second contact surface 2063 is defined as the bottom angle of the second brightness-enhancing film layer 206, the angle between the third light-emitting surface 2064 and the fourth light-emitting 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-emitting surface 2064 and the fourth light-emitting surface 2065 of the second prism column 2062 is defined as the axial direction L2 of the second brightness-enhancing film layer 206.

[0077] In this embodiment of the present application, a second substrate 2061 and a plurality of parallel and connected to the upper surface of the second substrate 2061 2 The prism column 2062 may be made of a different material. The second substrate 2061 may be made of a plastic material, and the second prism column 2062 may be made of a glass material.

[0078] In some embodiments, the angular range of the apex angle of the first brightness-enhancing film layer 205 may be 106 to 118 degrees, i.e., the angular range of the base angle of the first brightness-enhancing film layer 205 may be 31 to 37 degrees. Compared to some embodiments, for example, a solution in which the apex angle of the first brightness-enhancing film layer 205 is 90 degrees, this setting solution can increase the amount of emitted light at larger angles. This broadens the range and increases to some extent the total energy of the emitted light from the entire first brightness-enhancing film layer 205.

[0079] In some embodiments, the apex angle of the second brightness-enhancing film layer 206 may be in the range of 106 to 118 degrees, and the base angle of the second brightness-enhancing film layer 206 may be in the range of 31 to 37 degrees. Compared to some embodiments, for example, a solution in which the apex angle of the second brightness-enhancing film layer 206 is 90 degrees, this setting solution can increase the amount of emitted light at larger angles. This broadens the range and increases to some extent the total energy of the emitted light from the entire second brightness-enhancing film layer 206.

[0080] By widening the range of emitted light across the entire 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. Similarly, by widening the range of emitted light across the entire 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 uniformity of brightness across the entire liquid crystal display 001 and increases the viewing angle at specific brightness levels.

[0081] In the following, we will 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 large angles can be increased, and the range of emitted light for the entire first brightness-enhancing film layer 205 can be broadened to some extent, by using the first brightness-enhancing film layer 205 as an example.

[0082] Figure 4b shows the light propagation in the first brightness-enhancing film layer 205 with apex angles of 90 degrees and greater than 90 degrees, respectively, according to an embodiment of the present application. The cross-section of the first brightness-enhancing film layer 205 with an apex angle of 90 degrees is shown by a solid line, and the cross-section of the first brightness-enhancing film layer 205 with an apex angle greater than 90 degrees is shown by a dashed line.

[0083] As shown in Figure 4b, assume that the total reflection angle of the first brightness-enhancing film layer 205 of the prism is B1. For example, B1 is 45 degrees, the apex angle of the first brightness-enhancing film layer is 90 degrees, and the base angle of the first brightness-enhancing film layer is 45 degrees. The amount of light is high. When light is incident on the first light output surface 2054, the light undergoes total internal reflection at the second light output surface 2055, and then undergoes total internal reflection from the second light output surface 2055 towards the light source. This results in a loss of light energy.

[0084] For example, when light i1 is incident on the first light output surface 2054 of the first brightness-enhancing film layer 205 at an incident angle B1, i.e., 45 degrees, light i1 undergoes total internal reflection at the second light output surface 2055, and then undergoes total internal reflection from the second light output surface 2055 toward the light source.

[0085] However, as the apex angle of the first brightness-enhancing film layer 205 increases, when light i2 is incident on the first light-emitting surface 2054 of the first brightness-enhancing film layer 205 at a larger apex angle in a direction parallel to i1, the incident angle B2 of light i2 becomes smaller than the incident angle B1 of i1. In this way, light i2 is not totally reflected but is refracted at the first light-emitting surface 2054.

[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 larger 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 some 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 acute angles as shown in Figure 4a, or in some embodiments, they may be arc angles having a specific number of radians.

[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 specific number of radians, 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 may be 16 μm or less.

[0089] In some embodiments, the 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 be alternatively set to be greater than 90 degrees, for example, to 140 to 180 degrees. Similarly, the amount of light reflected back to the light source may be reduced, and the amount of emitted light at larger angles may be increased to broaden the range and increase to some extent the total energy of the emitted light from the entire brightness-enhancing film structure layer.

[0090] Figure 5 is a simulation diagram of the light irradiation 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, but the axial angle between the first brightness-enhancing film layer 205 and the second brightness-enhancing film layer 206 is different, and the first brightness-enhancing film layer 205 corresponds to a different bottom angle.

[0091] In Figure 5, the horizontal coordinate is the sine value of the angle between the axial direction of the first brightness-enhancing film layer 205 and the axial direction of the second brightness-enhancing film layer 206, representing an angle range of 0 to 90 degrees. The vertical coordinate is the bottom angle of the first brightness-enhancing film layer 205, with a coordinate range of 10 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 represents 75% of the maximum front brightness. An L75 viewing angle greater than ±30 degrees indicates that the viewing angle range for 75% of the front brightness is greater than the 30-degree deflection range of the front line of sight.

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

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

[0094] The cross-section or section of the prism column referred to in the embodiments of this application is a prism column or Brightness-enhancing film structure layer It will be understood that this is a section perpendicular to the axis of the plane.

[0095] In a solution of another embodiment, to further improve the uniformity of the emitted light in this embodiment of the present application, one embodiment of the present application provides another backlight structure. The prism column of one of the brightness-enhancing film layers in the backlight structure is arranged as a prism column of an arc-shaped column structure. Note that in this embodiment of the present application, the cross section of the arc-shaped column structure is a column structure whose cross section is an arc surface, and the arc surface may be a semicircular surface, or an arc surface larger or smaller than a semicircle. That is, the contour of the cross section of the arc-shaped column structure is enclosed by a straight line and an arc line connected to the head and end of this straight line. Figure 7 is a diagram of a brightness-enhancing film structure layer according to an embodiment of the present application. As shown in Figure 7, the brightness-enhancing film structure layer includes a first brightness-enhancing film layer 205 and a second brightness-enhancing film layer 206. The first brightness-enhancing film layer 205 and the second brightness-enhancing film layer 206 are laminated. The first brightness-enhancing film layer 205 may be positioned below the second brightness-enhancing film layer 206.

[0096] As shown in Figure 7, the first brightness-enhancing film layer 205 includes a first substrate 2051 and a first prism column layer connected to the upper surface of the first substrate 2051, the first prism column layer including a plurality of parallel first prism columns 2052. The first prism columns 2052 are triangular prisms. Each of the plurality of first prism columns 2052 includes a first contact surface 2053 connected to the substrate and a first light-emitting surface 2054 and a second light-emitting surface 2055 adjacent to the first contact surface 2053. The lines along which the edges corresponding to each first contact surface 2053 of each of the plurality of first prism columns 2052 are located are parallel. In some embodiments, the first light-emitting surface 2054 and the second light-emitting surface 2055 may be light-emitting surfaces of the same size.

[0097] For the sake of clarity, in this embodiment of the present application, the angle between the first light-emitting surface 2054 and the first contact surface 2053 is defined as the bottom angle of the first brightness-enhancing film layer 205, the angle between the first light-emitting surface 2054 and the second light-emitting surface 2055 is defined as the apex angle of the first brightness-enhancing film layer 205, and the extending direction of each connecting edge between the first light-emitting surface 2054 and the second light-emitting surface 2055 of the first prism column 2052 is defined as the axial direction L1 of the first brightness-enhancing 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 parallel-arranged second prism columns 2062. The cross-section of each of the plurality of second prism columns 2062 is an arc, and the arc is an image enclosed by arc segments and straight lines. The arc segments may be parts of the arc of the whole circle, and the straight line segments may be chords corresponding to the arc segments.

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

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

[0101] In this embodiment of the present application, the angle between the endpoint tangent of the connecting line between the arc-shaped cross section of the second prism column 2062 and the second substrate 2061 and the connecting line may be defined as the base angle of the second prism column 2062. The central angle corresponding to the arc in the arc-shaped cross section of the second prism column 2062 is defined as the apex angle of the second prism column 2062. The direction perpendicular to the arrangement direction of the plurality of second prism columns 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 column 2052 of the first brightness-enhancing film layer 205 may be alternatively connected to the second substrate of the second brightness-enhancing film layer 206, i.e., the second prism column 2062 of the second brightness-enhancing film layer 206 is located on the upper surface of the second brightness-enhancing film layer 206.

[0103] In this embodiment of the present application, the 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-enhancing film structure layer provided in Figure 7 can effectively improve the uniformity of the emitted light from the brightness-enhancing film structure layer and expand the angular range of the emitted light from the brightness-enhancing film structure layer to some extent.

[0105] As shown in Figure 8, the cross-sectional shape of the second prism column 2062 is arc-shaped. Taking this cross-section as an example, when multiple parallel beams of light i1, i2, i3, i4, i5, and i6 are incident on the edge line of this cross-section, the corresponding emitted beams i11, i21, i31, i41, i51, and i61 will be in different directions, resulting in a dispersion of the light emission direction. This improves the uniformity of the emitted light from the brightness-enhancing film structure layer and broadens the angular range of the emitted light from the brightness-enhancing film structure layer to some extent.

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

[0107] In some embodiments, the emitted light has a wider angular range. Brightness-enhancing film structure layer To obtain this, the angular range of the bottom angle of the first brightness-enhancing film layer 205 may be 37 degrees to 55 degrees, that is, the angular range of the apex angle may be 70 degrees to 106 degrees.

[0108] The angular range of the apex angle of the second brightness-enhancing film layer 206 may be 64 degrees to 70 degrees, that is, the angular 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. The radius of curvature of the apex angle of the second brightness-enhancing film layer may be 24 μm or less.

[0110] Figure 10 is a simulation diagram of the light irradiation field distribution of the backlight structure when the brightness-enhancing film structure layer in this embodiment of the present application has the structure shown in Figure 7, the 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 is 90 degrees, and the first brightness-enhancing film layer 205 and the second brightness-enhancing film layer 206 correspond to different bottom angles.

[0111] In Figure 10, the horizontal coordinate represents the bottom angle of the first brightness-enhancing film layer 205, with a range of 0 to 90 degrees, and the vertical coordinate represents the bottom angle of the second brightness-enhancing film layer 206, with a range of 10 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, that L75 is 75% of the maximum front brightness, and that the viewing angle range of 75% of the front brightness is greater than the 30-degree deflection range of the front line of sight.

[0112] Figure 10 shows that when the bottom angle range of the first brightness-enhancing film layer 205 is 37 to 55 degrees and the apex angle of the second brightness-enhancing film layer 206 is 64 to 70 degrees, the front brightness of the backlight structure may be greater than 80% of the standard brightness, and the viewing angle range at 75% of the front brightness is greater than the deflection range of the front line of sight of 30 degrees. This indicates that the solution provided in this embodiment of the present application can increase the viewing angle of a liquid crystal display.

[0113] Figure 11 is a light irradiation field distribution diagram of a backlight structure in this embodiment of the present application, where the brightness-enhancing film structure layer has the structure shown in Figure 7, the angle between the axial direction of the first brightness-enhancing film layer 205 and the axial direction of the second brightness-enhancing film layer is 90 degrees, and the first brightness-enhancing film layer 205 and the second brightness-enhancing film layer 206 correspond to different bottom angles.

[0114] Figure 11 shows that when the bottom angle range of the first brightness-enhancing film layer 205 is 37 to 55 degrees and the apex angle of the second brightness-enhancing film layer 206 is 64 to 70 degrees, the front brightness of the backlight structure may be greater than 75% of the standard brightness, and the viewing angle range for 75% of the front brightness is greater than or equal to the 40-degree deflection range of the front line of sight (the L75 viewing angle is greater than ±40 degrees). The viewing angle range for 50% of the front brightness is greater than or equal to the 40-degree deflection range of the front line of sight. 50 The field of view is ±55 degrees (the L50 field of view is greater than ±55 degrees).

[0115] In some embodiments, as shown in Figure 12, the bottom angles of the multiple second prism columns 2062 in the second brightness-enhancing film layer 206 are 2 circuit board 20 6 The angle of the light emitted from the second prism column 2062 at the edge of the second brightness-enhancing film layer 206 may gradually decrease from the center of 1. In this way, the angle of the light emitted from the second prism column at the edge of the second brightness-enhancing film layer 206 may be small. This reduces the amount of light emitted to the side of the second brightness-enhancing film layer and reduces light energy loss.

[0116] In some embodiments, a plurality of second substrate 206 1 The bottom corners are also the first substrate 20 5 The value may gradually decrease in the direction from the center of 1 toward the edge prism column.

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

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

[0119] The third Brightness-enhancing film layerThe third substrate 2071 of 207 is connected to the color conversion film layer 204.

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

[0121] In some embodiments, as shown in Figure 13b, the cross-section of each of the plurality of third prism columns 2072 of the third brightness-enhancing film layer 207 may alternatively be triangular, i.e., the third prism column 2072 may be a triangular prism. Each of the plurality of third prism columns 2072 includes a third contact surface 2073 connected to the third substrate 2071, and a fifth light-emitting surface 2074 and a sixth light-emitting surface 2075 adjacent to the third contact surface 2073. 3 The straight lines on which the edges corresponding to the contact surface 2073 are located are parallel. In some embodiments, the fifth and sixth light-emitting surfaces 2074 and 2075 may be light-emitting surfaces of the same size.

[0122] For the sake of clarity, in this embodiment of the present application, the angle between the fifth light-emitting surface 2074 and the third contact surface 2073 is defined as the base angle of the third prism column 2072, and the angle between the fifth light-emitting surface 2074 and the sixth light-emitting surface 2075 is defined as the apex angle of the third prism column 2072.

[0123] In some embodiments, the multiple third prism columns within the third brightness-enhancing film layer 207 may have the same structure, and the radius of curvature range of the apex angle of the third brightness-enhancing film layer may be 5 μm to 24 μm. The range of the base angle of the third brightness-enhancing film layer 205 may be 31 degrees to 58 degrees, that is, the range of the apex angle may be 64 degrees to 118 degrees.

[0124] In some embodiments, the apex angles of the multiple third prism columns in the third brightness-enhancing film layer 207 gradually increase in the direction from the center of the third brightness-enhancing film layer 207 toward the third prism columns 2072 at the edges.

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

[0126] In Figure 14, the horizontal coordinate is the bottom angle of the third brightness-enhancing film layer, with a range of 0 to 90 degrees, and the vertical coordinate is the radius of curvature of the apex angle, with a range of 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, that L75 is 75% of the maximum front brightness, and 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.

[0127] Figure 14 shows that when the bottom angle range of the third brightness-enhancing film layer 205 is 31 to 58 degrees, the front brightness of the backlight structure may be greater than 80% of the standard brightness, and the viewing angle range at 75% of the front brightness is greater than the deflection range of the front line of sight of 30 degrees.

[0128] Figure 15 is a simulation diagram of the light field distribution of the backlight structure when the brightness-enhancing film structure layer in this embodiment of the present application has the structure shown in Figure 13a, and the third brightness-enhancing film layer corresponds to different radii of curvature at different bottom angles and different apex angles.

[0129] Figure 15 shows that when the bottom angle range of the third brightness-enhancing film layer is 31 to 58 degrees, i.e., the apex angle range is 64 to 118 degrees, and the radius of curvature of the apex angle is 5 μm to 24 μm, the front brightness of the backlight structure may be greater than 75% of the standard brightness, and the viewing angle range for 75% of the front brightness is a deflection range of 35 degrees or more from the front line of sight (the L75 viewing angle is greater than ±35 degrees). The viewing angle range for 50% of the front brightness is a deflection range of 40 degrees or more from the front line of sight (the L50 viewing angle is greater than ±40 degrees).

[0130] In this embodiment of the present application, it will be understood that 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 do not have to be exactly the same. In fact, the difference between the two base angles may be between 0 and 3 degrees.

[0131] In some embodiments, it will be understood that the multiple first prism columns in the first prism column layer within the first brightness-enhancing film layer 205 do not have to be of a uniform shape. For example, in the first prism column layer, some of the first prism columns may be arranged to form an arc-shaped column structure, while other parts of the first prism columns may be arranged to form a triangular prism structure.

[0132] In some embodiments, the first brightness-enhancing film layer 205 may be divided into an intermediate region and a first edge region and a second edge region located on either side of the intermediate region. The first prism column 2052 in the intermediate region may be an arc-shaped column structure, while the first prism column 2052 in the first edge region and the first prism column 2052 in the second edge region may be a triangular prism structure. The angular range corresponding to the arc in the cross-section of the first prism column in the intermediate region may be 64 degrees to 70 degrees. The apex angle of the first prism column 2052 in the first edge region and the second edge region may be 90 degrees.

[0133] Because an arc-shaped structure has a larger angle of light diffusion, arranging the first prism column 2052 in the intermediate region as an arc-shaped column structure effectively expands the emission angle range of the first brightness-enhancing film layer 205. A triangular prism structure with a vertex angle of 90 degrees has a small angle of light diffusion. Therefore, the first prism column 2052 in the first and second edge regions may be arranged as a triangular prism with a vertex angle of 90 degrees. This prevents a large amount of light from being emitted from the edge region of the first brightness-enhancing film layer 205, thereby reducing light energy loss.

[0134] In some embodiments, the division of the intermediate region, the first edge region, and the second edge region may be determined based on actual requirements. For example, the region where the first prism column 2052 is located at one end edge of the first brightness-enhancing film layer 205 may be used as the first edge region, the region where the first prism column 2052 is located at the other end edge of the first brightness-enhancing film layer 205 may be 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 may be used as the intermediate region.

[0135] It will be understood that the second brightness-enhancing film layer 206 and the third brightness-enhancing film layer 207 may be arranged such that the multiple prism columns in the first brightness-enhancing film layer 205 cannot have a uniform shape. 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 emitted light from the brightness-enhancing film structure layer and expand the angular range of the emitted light from the brightness-enhancing film structure layer.

[0137] Another aspect of one embodiment of this application provides a liquid crystal display including display components and the aforementioned backlight structure.

[0138] It will be understood that the electronic device in one embodiment of this application may be replaced by a device such as a liquid cooling cabinet.

[0139] References to “one embodiment,” “some embodiments,” etc., described herein mean that one or more embodiments of this application include certain features, structures, or characteristics described with reference to the embodiments. Accordingly, phrases such as “in one embodiment,” “in some embodiments,” “in some other embodiments,” and “in other embodiments,” appearing in various parts of this specification, do not necessarily mean that they refer to the same embodiment. Instead, these phrases mean “one or more embodiments, but not all,” unless otherwise specifically emphasized. The terms “include,” “equip,” “have,” and all variations thereof mean “include, but not limited to,” unless otherwise specifically emphasized.

[0140] The foregoing 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 modifications or substitutions that are readily conceivable by a person skilled in the art within the scope of the art disclosed herein shall be within the scope of protection of the present application. Where there is no inconsistency, embodiments and features of embodiments of the present application may be combined with each other. Accordingly, 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 Structures 101 Wide-angle film 1011 First Bass 1012 Second Bass 1013 Functional Layer 1014 Connecting 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 substrate 2052 First Prism Column 2053 First contact surface 2054 First light output surface 2055 Second optical output surface 206 Second brightness-enhancing film layer 2061 Second substrate 2062 Second Prism Column 2063 Second contact surface 2064 Third optical surface 2065 Fourth optical output surface 207 Third brightness-enhancing film layer 2071 Third substrate 2072 Third Prism Column

Claims

1. A backlight structure comprising a light source layer, an optical functional structure layer, and a brightness-enhancing film structure layer, wherein the light source layer, the optical functional structure layer, and the brightness-enhancing 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 which comprises a laminated and connected substrate and prism column layer. The prism column layer comprises at least one protruding structure disposed on the substrate, The at least one brightness-enhancing film layer particularly includes a first brightness-enhancing film layer and a second brightness-enhancing film layer laminated in the first direction, The first brightness-enhancing film layer comprises a first substrate and a first prism column layer laminated and connected, the first prism column layer comprises a plurality of first prism columns connected in parallel, and all of the plurality of first prism columns connected in parallel have a prism structure. The second brightness-enhancing film layer comprises a laminated and connected second substrate and a second prism column layer, the second prism column layer comprises a plurality of second prism columns connected in parallel, and all of the plurality of second prism columns connected in parallel have an arc-shaped column structure. A backlight structure in which the central angles of the arcs in the cross-sections of the plurality of second prism columns in the second prism column layer gradually increase from the center position on the second prism column layer toward the edges.

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

3. The arc-shaped projection structure is a dot-shaped arc-shaped structure, a strip-shaped arc-shaped projection structure, or a multi-segment arc-shaped projection structure. The backlight structure according to claim 2, wherein the angular projection structure is a dot-type angular projection structure, a strip-type angular projection structure, and a multi-segment angular projection structure.

4. The first substrate is connected to the optical functional structure layer, The backlight structure according to claim 1, wherein 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 layer, the second substrate, and the second prism column layer are stacked in the first direction.

5. The backlight structure according to claim 4, wherein the angle between the extending direction of the first prism column and the extending direction of the second prism column is 90 degrees.

6. The backlight structure according to claim 1, wherein the plurality of second prism columns in the second prism column layer have the same size structure.

7. The backlight structure according to claim 6, wherein the angular range of the central angle of the arc in the cross-section of the second prism column is 64 degrees to 70 degrees.

8. The backlight structure according to claim 5, wherein the radius of curvature of the arc in the cross-section of the second prism column is 24 μm or less.

9. The backlight structure according to any one of claims 1 to 8, wherein the plurality of first prism columns in the first prism column layer have the same size structure.

10. The first prism column comprises a first contact surface connected to the first substrate, and a first and second light-emitting surfaces connected to the first contact surface. The backlight structure according to claim 9, wherein the angle between the first light-emitting surface and the first contact surface is 37 degrees to 55 degrees, and the angular range of the angle between the second light-emitting surface and the first contact surface is 37 degrees to 55 degrees.

11. The backlight structure according to any one of claims 1 to 8, wherein the apex angles of the plurality of first prism columns in the first prism column layer, the apex angles facing the first substrate, gradually increase from the center position on the first prism column layer toward the edge.

12. The at least one brightness-enhancing film layer comprises a third brightness-enhancing film layer, The backlight structure according to claim 1, wherein the third brightness-enhancing film layer comprises a laminated and connected third substrate and a third prism column layer, the third prism column layer comprises a plurality of third prism columns connected in parallel, and all of the plurality of third prism columns connected in parallel have an arc-shaped column structure.

13. The backlight structure according to claim 12, wherein the plurality of third prism columns in the third prism column layer have the same size structure.

14. The backlight structure according to claim 13, wherein the angular range of the central angle of the arc in the cross-section of the third prism column is 64 degrees to 118 degrees.

15. The backlight structure according to claim 13, wherein the radius of curvature of the arc in the cross-section of the third prism column is 5 μm to 24 μm.

16. The backlight structure according to claim 12, wherein the central angles of the arcs in the cross-sections of the plurality of third prism columns in the third prism column layer gradually increase from the center of the third prism column layer toward the edges.

17. The backlight structure according to claim 1, wherein the angle between the extending direction of the first prism column and the extending direction of the second prism column is not 90 degrees.

18. The backlight structure according to claim 1, wherein the first prism column comprises a first contact surface connected to the first substrate, and a first light-emitting surface and a second light-emitting surface connected to the first contact surface, the angle between the first light-emitting surface and the first contact surface is 37 to 55 degrees, and the angular range of the angle between the second light-emitting surface and the first contact surface is 37 to 55 degrees.

19. The backlight structure according to any one of claims 1 to 8, wherein the prism structure includes a triangular prism structure or a trapezoidal prism structure.

20. The backlight structure according to any one of claims 2 to 8, wherein the arc-shaped column structure includes a semi-cylindrical structure or a semi-elliptical column structure.

21. The backlight structure according to any one of claims 1 to 8, wherein the optical functional structure layer includes a light diffusion layer, a light selective transmission layer, and a color conversion film layer stacked in the first direction.

22. A display comprising a display component and a backlight structure according to any one of claims 1 to 8, wherein the display component is arranged on the surface of a brightness-enhancing film structure layer in a first direction.

23. An electronic device comprising the display described in claim 22.

Images