WO2020063682A1 - 导光板、背光模组及显示装置 - Google Patents

导光板、背光模组及显示装置 Download PDF

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Publication number
WO2020063682A1
WO2020063682A1 PCT/CN2019/107914 CN2019107914W WO2020063682A1 WO 2020063682 A1 WO2020063682 A1 WO 2020063682A1 CN 2019107914 W CN2019107914 W CN 2019107914W WO 2020063682 A1 WO2020063682 A1 WO 2020063682A1
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WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
light
prism
halftone
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Application number
PCT/CN2019/107914
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English (en)
French (fr)
Inventor
马永达
吴新银
乔勇
先建波
李盼
Original Assignee
京东方科技集团股份有限公司
北京京东方技术开发有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方技术开发有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/649,167 priority Critical patent/US20210231860A1/en
Publication of WO2020063682A1 publication Critical patent/WO2020063682A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects

Definitions

  • the present disclosure relates to the field of display technology, and particularly to a light guide plate, a backlight module, and a display device.
  • liquid crystal display LCD
  • LCD liquid crystal display
  • Backlight modules are used for liquid crystal display products.
  • One of the key components is the ability to convert point or line light sources into practical surface light sources for display devices, thereby providing the display device with the light sources required for display.
  • An embodiment of the present disclosure provides a light guide plate, including:
  • a light guide plate substrate having opposite light emitting surfaces and a halftone dot surface
  • a plurality of prisms each of which is located on the light emitting surface
  • a plurality of outlets each of which is located on the outlet surface
  • each of the halftone dots on the light emitting surface there is an overlapping area between the orthographic projection of each of the halftone dots on the light emitting surface and the orthographic projection of at least one prism on the light emitting surface; the maximum width of each halftone dot is less than 1.5 times the span of each of the prisms ; The span of each of the prisms is the bottom edge of the main section of the prism near the light guide plate substrate side.
  • the maximum width of the halftone dots is greater than 0.5 times the span of the prism.
  • the prism is a triangular prism, and the two sides of the main cross section of the triangular prism except the bottom side have the same length. ;
  • D represents the maximum width of the halftone dots
  • H represents the height corresponding to the bottom edge in the main section of the triangular prism
  • ⁇ represents the bottom angle in the main section.
  • the prism is protruded from a surface of the light guide plate substrate on the light emitting surface side;
  • the halftone dots protrude from a surface of the light guide plate substrate on the halftone dot side.
  • the prism is protruded from a surface of the light guide plate substrate on the light emitting surface side;
  • the halftone dots are recessed on a surface of the light guide plate substrate on the halftone dot side.
  • the prism is recessed on a surface of the light guide plate substrate on the light emitting surface side;
  • the halftone dots protrude from a surface of the light guide plate substrate on the halftone dot side.
  • the prism is recessed on a surface of the light guide plate substrate on the light emitting surface side;
  • the halftone dots are recessed on a surface of the light guide plate substrate on the halftone dot side.
  • a plurality of the dots are arranged in an array
  • One of the prisms corresponds to one half or one row of the halftone dots.
  • the shape of the halftone dots is circular, oval, or polygonal.
  • An embodiment of the present disclosure provides a backlight module including the above-mentioned light guide plate.
  • the above-mentioned backlight module provided in the embodiment of the present disclosure further includes: a light source on a side of the light guide plate, and a reflection plate on a halftone surface side of the light guide plate.
  • the method further includes: a back plate frame located on a light emitting surface side of the light guide plate, and a dot surface side of the light guide plate.
  • the projections overlap.
  • the orthographic projection of the halftone dots on the halftone dots on the light exit surface of the light guide plate and the backplane frame are in the The orthographic projection of the edge of the light guide surface of the light guide plate on the light guide surface of the light guide plate overlaps.
  • the orthographic projection of at least two rows of dots on the dot surface on the light exit surface of the light guide plate and the backplane frame The orthographic projection of the edge on the light exit surface side of the light guide plate on the light exit surface of the light guide plate overlaps.
  • An embodiment of the present disclosure provides a display device including the above-mentioned backlight module.
  • the display device further includes: a display panel located on a light emitting surface side of the light guide plate.
  • 1 to 4 are schematic structural diagrams of a light guide plate according to an embodiment of the present disclosure
  • FIG. 5 is a schematic plan view of a light guide plate according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
  • a backlight module generally includes a light guide plate.
  • a prism is integrated on one surface of the light guide plate, and a dot is integrated on the other surface.
  • improper cooperation between the prism and the dot on the light guide plate may easily cause the backlight module to fail. Poor light uniformity results in poor display image uniformity.
  • an embodiment of the present disclosure provides a light guide plate, a backlight module, and a display device.
  • the present disclosure provides a light guide plate, as shown in FIG. 1 to FIG. 4, including:
  • the light guide plate substrate 101 includes a light exit surface S1 and a halftone dot surface S2 opposite to the light exit surface S1, that is, the light guide plate base 101 has opposite light exit surfaces S1 and halftone dot surfaces S2;
  • a plurality of prisms 102 each of which is located on the light exit surface S1 of the light guide plate substrate 101;
  • a plurality of halftone dots 103, each halftone dot 103 is located on a halftone dot surface S2 of the light guide plate substrate 101;
  • each halftone dot 103 on the light exit surface S1 of the light guide plate base material 101 and the orthographic projection of the prism 102 on the light exit surface S1 of the light guide plate base material 101 overlap; the maximum width of each halftone dot 103 is smaller than that of each prism 102. 1.5 times the span; the span of each prism 102 is the bottom edge of the prism 102 near the light guide plate substrate 101 side in the main section.
  • the maximum width of the halftone dot 103 is set to be less than 1.5 times the span of the prism 102, the size of the halftone dot 103 can be avoided, the light source fine-tuning range of the backlight source can be improved, and the uniform light effect of the halftone dot 103 can be guaranteed. To improve the uniformity of the light emitted by the backlight module.
  • FIG. 1 to 4 are cross-sectional views of a plane where the main section of the prism 102 is located, and the figure uses the shape of the main section of the prism 102 as a triangle for illustration.
  • the main section refers to a section perpendicular to the extending direction of the prism 102.
  • the main section of the prism 102 may also have other shapes, such as trapezoid, polygon, or arc.
  • the shape of the main section of the prism 102 is not limited here.
  • the prism 102 may be long And a plurality of prisms 102 can be arranged side by side on the light emitting surface S1 of the light guide plate substrate 101. As shown in FIG.
  • the span of the prism 102 is the bottom edge of the main section of the prism 102 close to the light guide plate substrate 101 side. It can also be understood as the total contact of the main section of the prism 102 with the surface of the light guide plate substrate 101.
  • a plurality of dots 103 are provided on the dot surface S2 of the light guide plate substrate 101.
  • the dots 103 can be arranged according to a certain rule or can be evenly dispersed on the surface of the light guide plate substrate 101.
  • the dots 103 are not aligned here. The distribution is limited.
  • the light source 202 introduces light from the light incident side of the light guide plate substrate 101. Part of the introduced light is directly directed to the prism 102 and exits, and part of the light is incident on the halftone surface S2 of the light guide plate substrate 101 and the halftone surface S2 of the light guide plate substrate 101.
  • the halftone dot 103 can play a role of reflecting, scattering, etc. on the light, so that the reflected light forms scattered light distributed uniformly in all directions.
  • the orthographic projection of the halftone dot 103 on the light exit surface S1 of the light guide plate base material 101 and the orthographic projection of the prism 102 on the light exit surface S1 of the light guide plate base material 101 have overlapping areas, the light reflected at the halftone dot 103 is easier to The light emitted from the prism 102 can converge the light, so that the light emitted from the light exit surface S1 of the light guide plate substrate 101 can be condensed in a certain area, and the intensity of the light emitted from the light exit surface S1 of the light guide plate 101 can be increased.
  • the shape of the halftone dot 103 may be a circle, an ellipse, a polygon, or other irregular shapes, which is not limited herein.
  • the maximum width of the halftone dot 103 is the diameter of the halftone dot 103.
  • the maximum width of the halftone dot 103 is the diameter in the long axis direction.
  • the distance between the two furthest points on the edge of the halftone dot 103 may be taken as the maximum width of the halftone dot 103, or the maximum width of the halftone dot 103 may be determined by other methods, which is not limited here.
  • the halftone dot 103 is a circle as an example for illustration.
  • R represents the radius of the halftone dot 103
  • the maximum width of the halftone dot 103 is 2R.
  • the range of optical fine-tuning, so the maximum width of halftone dot 103 is limited to a range less than 1.5 times the span of prism 102, which can prevent the size of halftone dot 103 from being too large, increase the light source trimming range of the backlight, and ensure the uniform light effect of halftone dot 103. Improve the uniformity of the light emitted from the backlight module.
  • the maximum width of the halftone dot 103 may be greater than 0.5 times the span of the prism 102.
  • the dots are arranged in traces, and thus visible in the rows and columns of the dots 103 on the light-emitting side of the display panel, resulting in poor display screen uniformity. Therefore, setting the maximum width of the halftone dot 103 to be 0.5 times larger than the span of the prism 102 can make the light reflected by the halftone dot 103 exit from both sides of the prism 102, improve the light converging effect of the prism 102, and ensure the light emitted from the light guide plate. Uniformity, which in turn improves the display effect.
  • the prism 102 may be a triangular prism, and the side lengths of the other two sides of the triangular prism except the bottom side are equal;
  • the maximum width of the dot 103 satisfies the following relationship:
  • the span of the prism is 2L
  • D represents the maximum width of the halftone dot 103.
  • the width is generally greater than 0.5 times the span of the prism and less than 1.5 times the span of the prism 102, that is, satisfying L ⁇ D ⁇ 3L.
  • D 2R can also be expressed as H / tan ⁇ ⁇ 2R ⁇ 3H / tan ⁇ .
  • the maximum width of the halftone dot 103 and various parameters in the prism can be determined according to the relationship.
  • limiting the maximum size of the dots 103 to 0.5 times greater than the span of the prism 102 and less than 1.5 times the span of the prism 102 can prevent the size of the dots 103 from being too large or too small, and ensure that the sizes of the prism 102 and the dots 103 can be The matching is good, and the problem of poor optical screen caused by the poor dimensional matching between the prism 102 and the halftone dot 103 is eliminated.
  • the above-mentioned prism 102 and halftone dots 103 can be made with the light guide plate base 101 in an integrated molding process, and the light guide plate base 101 can also be made with the prism 102 and halftone dots 103 by a corresponding process, which is not limited here.
  • the prism 102 and the halftone dot 103 in the light guide plate may include the following implementations.
  • the prism 102 protrudes from a surface of the light guide plate substrate 101 on the light emitting surface S1 side;
  • the halftone dots 103 protrude from the surface of the light guide plate substrate 101 on the halftone dot surface S2 side.
  • Both the prism 102 and the dots 103 protrude from the surface of the light guide plate substrate 101.
  • a layer of prism 102 can be directly made on the surface of the light guide plate substrate 101, and a layer of dots 103 can be made on the other side.
  • the manufacturing process is simple. Cost is lower.
  • the prism 102 protrudes from the surface of the light guide plate substrate 101 on the light emitting surface S1 side;
  • the halftone dots 103 are recessed on the surface of the light guide plate substrate 101 on the halftone dot surface S2 side.
  • Setting the dots 103 to be recessed on the surface of the light guide plate substrate 101 can reduce the thickness of the light guide plate, thereby reducing the thickness of the backlight module, and is beneficial to the thinning and thinning of the display device.
  • the flat guide A plurality of pits are formed on the surface of the light plate substrate 101 to form a plurality of dots 103.
  • the light guide plate substrate 101 having the pits can also be directly formed by an integral molding process, and the manufacturing process is simple and easy.
  • the prism 102 is recessed on the surface of the light guide plate substrate 101 on the light emitting surface S1 side;
  • the halftone dots 103 protrude from the surface of the light guide plate substrate 101 on the halftone dot surface S2 side.
  • Setting the prism 102 to be recessed on the surface of the light guide plate substrate 101 can reduce the thickness of the light guide plate, thereby reducing the thickness of the backlight module, which is beneficial to reducing the thickness of the display device.
  • a plurality of groove structures matching the shape of the prism 102 may be formed on the surface of the flat light guide plate substrate 101, and the material of the prism 102 may be filled in the groove structure, or an integrated molding process may be used to directly form the groove structure.
  • the light guide plate substrate 101 of the groove structure is filled with the material of the prism 102 in the groove structure to form the structure shown in FIG. 3, and the manufacturing process is simple and easy.
  • the prism 102 is recessed on the surface of the light guide plate substrate 101 on the light emitting surface S1 side;
  • the halftone dots 103 are recessed on the surface of the light guide plate substrate 101 on the halftone dot surface S2 side.
  • Setting the prisms 102 and the dots 103 to be recessed on the surface of the light guide plate substrate 101 can reduce the thickness of the light guide plate to a maximum extent, thereby reducing the thickness of the backlight module, which is beneficial to the thinning and thinning of the display device.
  • a plurality of groove structures can be formed on one side of the flat light guide plate substrate 101 and a plurality of pits can be formed on the other side, and the material of the prism 102 can be filled in the groove structure, thereby forming the structure shown in FIG. 4.
  • the structure shown in the figure, or the one-piece molding process can also be used to directly form the light guide plate substrate 101 with a groove structure on one side and a concave point on the other side, and then fill the material of the prism 102 in the groove structure to obtain the structure shown in FIG. 4.
  • the structure shown is simple to make.
  • a plurality of dots 103 may be arranged in an array
  • One prism 102 may correspond to the dots 103 in a row or a column.
  • FIG. 5 shows a plan view of the light guide plate viewed from the halftone dot surface S2 side of the light guide plate. Since the prism 102 is not on the halftone dot surface S2, the prism 102 is shown by a dotted frame in the figure.
  • the prism 102 corresponds to a row of dots 103 as an example. In practical applications, the prism 102 may also correspond to a row of dots 103. In this way, the distribution of the dots 103 and the prism 102 is more uniform, which can make light from the light guide plate. The uniformity of the light emitted from the surface S1 is better.
  • the dots 103 and the prism 102 can also adopt other distribution methods and corresponding relationships. For example, in FIG. 5, a dot 103 can be inserted between two neighboring dots 103. This is just an example here, and the distribution and corresponding relationship between the halftone dots 103 and the prism 102 are not limited.
  • a reflective film or a reflective plate can be plated on the side of the dot 103 that faces away from the prism 102, so as to reflect the light leaking out of the dot 103 back to the inside of the light guide plate substrate 101.
  • the reflection amount of the light on the halftone dot surface S2 is increased, so that more light is emitted from the light emitting surface, and the light utilization rate is improved.
  • an embodiment of the present disclosure provides a backlight module.
  • the backlight module includes the light guide plate 201 described above. Since the principle of solving the problem of the backlight module is similar to the above-mentioned light guide plate, the implementation of the backlight module can refer to the implementation of the above-mentioned light guide plate, and the repeated description will not be repeated.
  • the dots 103 in the light guide plate 201 provided by the embodiment of the present disclosure will not be too large or too small, the uniformity of the light emitted by the backlight module including the light guide plate 201 is better, and the display effect of the display panel 206 is better. .
  • the backlight module may further include a light source 202 on a side of the light guide plate 201 and a reflection plate 204 on a side of the dot surface S2 of the light guide plate 201.
  • a light source 202 is arranged on the side of the light guide plate 201, and light emitted from the light source 202 is emitted from the light exit surface of the light guide plate 201 through processes such as reflection and scattering by the light guide plate 201, so as to convert a point light source or a line light source into a surface light source required for a display panel. To ensure that the display panel displays the picture normally.
  • a reflection plate 204 is provided on the halftone dot surface S2 side of the light guide plate 201, and the light leaked out of the halftone dot 103 can be reflected back to the inside of the light guide plate base 101, that is, the reflection amount of the light on the halftone dot surface S2 is increased, so that more light is emitted. The light is emitted from the light emitting surface, which improves the light utilization rate.
  • the backlight module may further include a back plate frame 205 located on a light exit surface S1 side of the light guide plate 201, and a back plate frame 205 located on a halftone surface S2 side of the light guide plate 201.
  • the projections overlap. That is, the back plate frame 205 will block the prism 102 located at the edge portion to better balance the light output effect at the edge position.
  • the orthographic projection of the dots 103 on the dot surface S2 on the light exit surface S1 of the light guide plate 201 and the backplane frame 205 on the light exit plate S1 of the light guide plate 201 overlaps. That is, the backplane frame 205 will block the halftone dots 103 located at the edge portion to better balance the light output effect at the edge position.
  • the orthographic projection of at least two rows of the dots 103 on the dot surface S2 on the light exit surface S1 of the light guide plate 201 and the back plate frame 205 on the light guide plate 201 overlaps. That is, the backplane frame 205 will block the halftone dots 103 located at the edge portion to better balance the light output effect at the edge position.
  • the light source 202 may include a light bar composed of a plurality of light emitting diodes (LEDs), and the light source 202 is connected to the light source back plate 203.
  • the display panel 206 is fixedly connected to the backlight module through the backplane frame 205 and the display module upper frame 207.
  • the display device includes the above-mentioned backlight module, and may further include a display panel 206 located on a light emitting surface S1 side of the light guide plate.
  • the display device can be applied to any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like. Since the principle of the display device to solve the problem is similar to the above-mentioned backlight module, the implementation of the display device can refer to the implementation of the above-mentioned backlight module, and the duplicated details will not be repeated.
  • the maximum width of the dots is less than 1.5 times the prism span, thereby avoiding the size of the dots to be too large, increasing the light source trimming range of the backlight source, and ensuring the uniform light effect of the dots.
  • the maximum width of the dots can be greater than 0.5 times the span of the prism to prevent the dots from being too small, to ensure that the light reflected by the dots exits from both sides of the prism, and to improve the uniformity of the light emitted from the light guide plate.

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Abstract

一种导光板、背光模组及显示装置，导光板包括：导光板基材（101），多个棱镜（102），以及多个网点（103）；其中，导光板基材（101）包括：出光面（S1），以及与出光面（S1）相对的网点面（S2）；棱镜（102）位于导光板基材（101）的出光面（S1）；网点（103）位于导光板基材（101）的网点面（S2）；且网点（103）在导光板基材（101）的出光面（S1）上的正投影与棱镜（102）在导光板基材（101）的出光面（S1）上的正投影有交叠区域；网点（103）的最大宽度小于棱镜（102）的跨度的1.5倍；棱镜（102）的跨度为棱镜（102）的主截面中靠近导光板基材（101）一侧的底边。导光板的网点（103）的最大宽度小于棱镜（102）跨度的1.5倍，从而可以避免网点（103）尺寸过大，提高背光源的光源微调范围，保证光学网点（103）的均光效果，提高背光模组的出射光的均一性。

Description

导光板、背光模组及显示装置
相关申请的交叉引用
本申请要求在2018年09月29日提交中国专利局、申请号为201821610636.8、申请名称为“一种导光板、背光模组及显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及显示技术领域，尤指一种导光板、背光模组及显示装置。
背景技术
随着液晶显示(Liquid Crystal Display，LCD)技术的发展，由液晶显示面板制作的产品日益增多，例如，手机、电视、计算机以及数码相机等，而背光模组(Backlight Module)是液晶显示产品的关键组件之一，能够将点光源或线光源转换成为显示装置实用的面光源，从而为显示装置提供显示所需的光源。
发明内容
本公开实施例提供了一种导光板，包括：
导光板基材，所述导光板基材具有相对而置的出光面和网点面；
多个棱镜，各所述棱镜位于所述出光面；
多个网点，各所述网点位于所述网点面；其中，
各所述网点在所述出光面上的正投影与至少一个所述棱镜在所述出光面上的正投影存在交叠区域；各所述网点的最大宽度小于各所述棱镜的跨度的1.5倍；各所述棱镜的跨度为所述棱镜的主截面中靠近所述导光板基材一侧的底边。
在一种可能的实现方式中，在本公开实施例提供的上述导光板中，所述 网点的最大宽度大于所述棱镜的跨度的0.5倍。
在一种可能的实现方式中，在本公开实施例提供的上述导光板中，所述棱镜为三棱镜，且所述三棱镜的主截面中除所述底边外的另外两个边的边长相等；
所述网点的最大宽度满足以下关系式：
H/tanα＜D＜3H/tanα；
其中，D表示所述网点的最大宽度；H表示所述三棱镜的主截面中所述底边对应的高，α表示所述主截面中的底角。
在一种可能的实现方式中，在本公开实施例提供的上述导光板中，所述棱镜凸出于所述导光板基材在所述出光面一侧的表面；
所述网点凸出于所述导光板基材在所述网点面一侧的表面。
在一种可能的实现方式中，在本公开实施例提供的上述导光板中，所述棱镜凸出于所述导光板基材在所述出光面一侧的表面；
所述网点凹陷于所述导光板基材在所述网点面一侧的表面。
在一种可能的实现方式中，在本公开实施例提供的上述导光板中，所述棱镜凹陷于所述导光板基材在所述出光面一侧的表面；
所述网点凸出于所述导光板基材在所述网点面一侧的表面。
在一种可能的实现方式中，在本公开实施例提供的上述导光板中，所述棱镜凹陷于所述导光板基材在所述出光面一侧的表面；
所述网点凹陷于所述导光板基材在所述网点面一侧的表面。
在一种可能的实现方式中，在本公开实施例提供的上述导光板中，多个所述网点呈阵列排布；
一个所述棱镜对应于一行或一列的所述网点。
在一种可能的实现方式中，在本公开实施例提供的上述导光板中，所述网点的形状为圆形、椭圆形或多边形。
本公开实施例提供了一种背光模组，包括：上述导光板。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组中，还 包括：位于所述导光板侧面的光源，以及位于所述导光板的网点面一侧的反射板。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组中，还包括：位于所述导光板的出光面一侧的背板框架，位于所述导光板的网点面一侧的背板；
所述背板框架在所述导光板出光面一侧的边缘在所述导光板的出光面上的正投影与所述导光板的出光面上的棱镜在所述导光板的出光面上的正投影存在交叠。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组中，所述网点面上的网点在所述导光板的出光面上的正投影与所述背板框架在所述导光板出光面一侧的边缘在所述导光板出光面上的正投影存在交叠。
在一种可能的实现方式中，在本公开实施例提供的上述背光模组中，所述网点面上的至少两行网点在所述导光板的出光面上的正投影与所述背板框架在所述导光板出光面一侧的边缘在所述导光板出光面上的正投影存在交叠。
本公开实施例提供了一种显示装置，包括：上述背光模组。
在一种可能的实现方式中，在本公开实施例提供的上述显示装置中，还包括：位于所述导光板的出光面一侧的显示面板。
附图说明
图1～图4分别为本公开实施例提供的导光板的结构示意图；
图5为本公开实施例提供的导光板的俯视结构示意图；
图6为本公开实施例提供的显示装置的结构示意图。
具体实施方式
相关技术中，背光模组中一般包括导光板，导光板的一个表面上集成有棱镜，另一个表面上集成有网点，然而，导光板上的棱镜和网点配合不当，容易导致背光模组的出射光均一性差，进而导致显示画面均一性差。
针对相关技术中存在的背光模组的出射光均一性差的问题，本公开实施例提供了一种导光板、背光模组及显示装置。
下面结合附图，对本公开实施例提供的导光板、背光模组及显示装置的具体实施方式进行详细地说明。附图中各膜层的厚度和形状不反映真实比例，目的只是示意说明本公开内容。
本公开提供了一种导光板，如图1～图4所示，包括：
导光板基材101，导光板基材101包括：出光面S1，以及与出光面S1相对的网点面S2，即导光板基材101具有相对而置的出光面S1和网点面S2；
多个棱镜102，各棱镜102位于导光板基材101的出光面S1；
多个网点103，各网点103位于导光板基材101的网点面S2；其中，
各网点103在导光板基材101的出光面S1上的正投影与棱镜102在导光板基材101的出光面S1上的正投影存在交叠区域；各网点103的最大宽度小于各棱镜102的跨度的1.5倍；各棱镜102的跨度为棱镜102的主截面中靠近导光板基材101一侧的底边。
本公开实施例提供的导光板，由于将网点103的最大宽度设置为小于棱镜102跨度的1.5倍，从而可以避免网点103尺寸过大，提高背光源的光源微调范围，保证网点103的均光效果，提高背光模组的出射光的均一性。
图1～图4为棱镜102的主截面所在平面的截面图，且图中以棱镜102的主截面的形状为三角形为例进行示意。主截面指的是垂直于棱镜102的延伸方向的截面。在具体实施时，棱镜102的主截面也可以是其他形状，例如梯形，多边形，或弧形等，此处不对棱镜102的主截面的形状进行限定，在实际应用中，棱镜102可以为长条状，且多个棱镜102可以在导光板基材101的出光面S1上并排排列。如图1所示，棱镜102的跨度为棱镜102的主截面中靠近导光板基材101一侧的底边，也可以理解为棱镜102的主截面中与导光板基材101的表面接触的总宽度，图中L为棱镜102的轴线到边缘之间的距离，因而棱镜102的跨度为2L，H为棱镜102的最高点与最低点之间的竖直距离，若棱镜102的主截面为三角形，α为主截面的侧边与底边之间的夹 角，则满足H＝L*tanα。
在导光板基材101的网点面S2设有多个网点103，在具体实施时，网点103可以按照一定的规律排列，也可以均匀的分散在导光板基材101的表面，此处不对网点103的分布进行限定。光源202从导光板基材101的入光侧导入光线，导入的光线一部分直接射向棱镜102而射出，一部分射向导光板基材101的网点面S2，导光板基材101的网点面S2上的网点103可以对光线起到反射、散射等作用，从而使反射光线形成沿各个方向均匀分布的散射光线。
由于网点103在导光板基材101的出光面S1上的正投影与棱镜102在导光板基材101的出光面S1上的正投影存在交叠区域，因而，网点103处反射的光线更容易从棱镜102处出射，棱镜102能够对光线起汇聚作用，从而使导光板基材101的出光面S1出射的光线能够汇聚在一定区域内，提高导光板101的出光面S1的出射光强度。
在具体实施时，网点103的形状可以为圆形、椭圆形、多边形等，也可以是其他不规则图形，此处不做限定。当网点103的形状为圆形时，网点103的最大宽度为网点103的直径，当网点103的形状为椭圆形时，网点103的最大宽度为长轴方向上的直径，当网点103为多边形或不规则图形时，可以取网点103的边缘上距离最远的两个点之间的距离作为网点103的最大宽度，也可以采取其他方式确定网点103的最大宽度，此处不做限定。图1～图4中，以网点103为圆形为例进行示意，图中R表示网点103的半径，网点103的最大宽度为2R。
因此，上述网点103的最大宽度小于棱镜102的跨度的1.5倍，可以表示为2R＜3L，且L＝H/tanα，因而2R＜3H/tanα，如果网点103的面积过大，会降低背光源光学微调的范围，因而将网点103的最大宽度限定在小于棱镜102的跨度的1.5倍的范围内，可以防止网点103尺寸过大，提高背光源的光源微调范围，保证网点103的均光效果，提高背光模组的出射光的均一性。
可选地，本公开实施例提供的上述导光板中，如图1～4所示，网点103的最大宽度可以大于棱镜102的跨度的0.5倍。
以图1～4所示的结构为例，可以表示为2R＞L，且L＝H/tanα，因而，2R＞H/tanα，也就是说，网点103的最大宽度应满足L＜2R＜3L。如果网点103的尺寸过小，容易造成从棱镜102的单个侧棱上出光比例过大，也就是网点103反射的光线大部分从棱镜102的一个侧面出射，造成棱镜102两侧能够观察到明显的网点排列痕迹，因而在显示面板出光侧网点103行列可视，导致显示面板的显示画面均匀性差。因而，将网点103的最大宽度设置为大于棱镜102的跨度的0.5倍，可以使网点103反射的光线从棱镜102的两个侧面出射，提高棱镜102对光线的汇聚作用，保证导光板的出射光线的均匀性，进而提高显示效果。
具体地，本公开实施例提供的上述导光板中，参照图1～图4，棱镜102可以为三棱镜，且三棱镜的主截面中除底边外的另外两个边的边长相等；
网点103的最大宽度满足以下关系式：
H/tanα＜D＜3H/tanα；
其中，D表示网点103的最大宽度；H表示三棱镜的主截面中底边对应的高，α表示主截面中的底角。
如图1～图4所示，图中L表示三棱镜的主截面中底边边长的一半，满足H＝L tanα，三棱镜的跨度为2L，D表示网点103的最大宽度，由于网点103的最大宽度一般为大于棱镜的跨度的0.5倍，且小于棱镜102跨度的1.5倍，也就是满足L＜D＜3L，结合H＝L tanα可得到H/tanα＜D＜3H/tanα，当网点103为圆形时，D＝2R，也可以表示为H/tanα＜2R＜3H/tanα.在具体实施时，可以根据该关系式确定网点103的最大宽度以及三棱镜中的各参数。
综上，将网点103的最大限定在大于棱镜102的跨度的0.5倍，且小于棱镜102的跨度的1.5倍，可以防止网点103的尺寸过大或过小，保证棱镜102与网点103的尺寸能够匹配良好，消除因棱镜102与网点103的尺寸配合度差导致的光学画面不良的问题。
在具体实施时，上述棱镜102与网点103可以与导光板基体101采用一体成型工艺制作，也可以在导光板基体101上采用相应的工艺制作棱镜102 和网点103，此处不做限定。
具体地，本公开实施例提供的上述导光板中，导光板中的棱镜102和网点103可以包括以下几种实现方式。
实现方式一：
参照图1，棱镜102凸出于导光板基材101在出光面S1一侧的表面；
网点103凸出于导光板基材101在网点面S2一侧的表面。
棱镜102和网点103均凸出于导光板基材101的表面，在制作过程中，可以直接在导光板基材101的表面制作一层棱镜102，另一面制作一层网点103，制作工艺简单，成本较低。
实现方式二：
如图2所示，棱镜102凸出于导光板基材101在出光面S1一侧的表面；
网点103凹陷于导光板基材101在网点面S2一侧的表面。
将网点103设置为凹陷于导光板基材101的表面，可以减小导光板的厚度，进而减小背光模组的厚度，有利于显示装置的轻薄化.在具体实施时，可以在平坦的导光板基材101的表面形成多个凹点，以形成多个网点103，也可以采用一体成型工艺直接形成具有凹点的导光板基材101，制作工艺简单易行。
实现方式三：
如图3所示，棱镜102凹陷于导光板基材101在出光面S1一侧的表面；
网点103凸出于导光板基材101在网点面S2一侧的表面。
将棱镜102设置为凹陷于导光板基材101的表面，可以减小导光板的厚度，进而减小背光模组的厚度，有利于显示装置的轻薄化。在具体实施时，可以在平坦的导光板基材101的表面形成多个与棱镜102形状匹配的凹槽结构，在凹槽结构中填充棱镜102的材料，或者也可以采用一体成型工艺直接形成具有凹槽结构的导光板基材101，在凹槽结构中填充棱镜102的材料，以形成图3所示的结构，制作工艺简单易行。
实现方式四：
如图4所示，棱镜102凹陷于导光板基材101在出光面S1一侧的表面；
网点103凹陷于导光板基材101在网点面S2一侧的表面。
将棱镜102和网点103均设置为凹陷于导光板基材101的表面，可以最大程度的减小导光板的厚度，进而减小背光模组的厚度，有利于显示装置的轻薄化。在具体实施时，可以在平坦的导光板基材101的一侧形成多个凹槽结构，另一侧形成多个凹点，并在凹槽结构中填充棱镜102的材料，从而形成图4所示的结构，或者也可以采用一体成型工艺，直接形成一侧具有凹槽结构另一侧具有凹点的导光板基材101，然后在凹槽结构中填充棱镜102的材料，以得到图4所示的结构，制作工艺简单。
在具体实施时，在本公开实施例提供的上述导光板中，如图5所示，多个网点103可以呈阵列排布；
一个棱镜102可以对应于一行或一列的网点103。
图5表示从导光板的网点面S2一侧观看导光板得到的俯视图，由于棱镜102并没有在网点面S2上，因而图中以虚线框表示棱镜102。图5中以棱镜102对应于一列网点103为例进行示意.在实际应用中，棱镜102也可以对应于一行网点103，这样，网点103和棱镜102的分布比较均匀，能够使从导光板的出光面S1出射的光线的均一性较好.此外，网点103和棱镜102也可以采用其他的分布方式和对应关系，例如可以在图5中在相邻两个网点103之间插入一个网点103等，此处只是举例说明，不对网点103和棱镜102的分布和对应关系进行限定。
此外，为了提高光线利用率，在网点103背离棱镜102的一侧还可以镀一层反射膜或设置一个反射板，从而将网点103处漏出的光线反射回导光板基材101内部，也就是提高了光线在网点面S2的反射量，从而使更多光线从出光面出射，提高了光线利用率。
基于同一发明构思，本公开实施例提供了一种背光模组，如图6所示，包括：上述导光板201。由于该背光模组解决问题的原理与上述导光板相似，因此该背光模组的实施可以参见上述导光板的实施，重复之处不再赘述。
由于本公开实施例提供的导光板201中的网点103不会过大或过小，因 而包括该导光板201的背光模组的出射光的均一性较好，保证显示面板206的显示效果更好。
具体地，在本公开实施例提供的背光模组中，参照图6，还可以包括：位于导光板201侧面的光源202，以及位于导光板201的网点面S2一侧的反射板204。
在导光板201侧面设置在光源202，光源202出射的光线经导光板201反射和散射等过程从导光板201的出光面出射，实现将点光源或线光源转换为显示面板所需的面光源，以保证显示面板正常显示画面。在导光板201的网点面S2一侧设置反射板204，可以将网点103处漏出的光线反射回导光板基材101内部，也就是提高了光线在网点面S2的反射量，从而使更多光线从出光面出射，提高了光线利用率。
具体地，在本公开实施例提供的背光模组中，参照图6，还可以包括：位于导光板201的出光面S1一侧的背板框架205，位于导光板201的网点面S2一侧的背板208；
背板框架205在导光板201出光面S1一侧的边缘在导光板201的出光面S1上的正投影与导光板201的出光面S1上的棱镜102在导光板201的出光面S1上的正投影存在交叠。即背板框架205会遮挡位于边缘部分的棱镜102，以更好地均衡边缘位置的出光效果。
具体地，在本公开实施例提供的背光模组中，参照图6，网点面S2上的网点103在导光板201的出光面S1上的正投影与背板框架205在导光板201出光面S1一侧的边缘在导光板201出光面S1上的正投影存在交叠。即背板框架205会遮挡位于边缘部分的网点103，以更好地均衡边缘位置的出光效果。
进一步地，在本公开实施例提供的背光模组中，参照图6，网点面S2上的至少两行网点103在导光板201的出光面S1上的正投影与背板框架205在导光板201出光面S1一侧的边缘在导光板201出光面S1上的正投影存在交叠。即背板框架205会遮挡位于边缘部分的网点103，以更好地均衡边缘位置的出光效果。
在具体实施时，光源202可以包括多个发光二极管(LED)组成的灯条，且光源202与光源背板203相连。显示面板206通过背板框架205和显示模组上框207与背光模组固定连接。
基于同一发明构思，本公开实施例提供了一种显示装置，如图6所示，包括上述背光模组，还可以包括：位于导光板的出光面S1一侧的显示面板206。该显示装置可以应用于手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。由于该显示装置解决问题的原理与上述背光模组相似，因此该显示装置的实施可以参见上述背光模组的实施，重复之处不再赘述。
本公开实施例提供的导光板、背光模组及显示装置，由于网点的最大宽度小于棱镜跨度的1.5倍，从而可以避免网点尺寸过大，提高背光源的光源微调范围，保证网点的均光效果，提高背光模组的出射光的均一性。此外，网点的最大宽度还可以大于棱镜的跨度的0.5倍，以防止网点过小，保证网点反射的光线从棱镜的两个侧面出射，提高导光板的出射光线的均匀性。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (16)

  1. 一种导光板，包括：
    导光板基材，所述导光板基材具有相对而置的出光面和网点面；
    多个棱镜，各所述棱镜位于所述出光面；
    多个网点，各所述网点位于所述网点面；其中，
    各所述网点在所述出光面上的正投影与至少一个所述棱镜在所述出光面上的正投影存在交叠区域；各所述网点的最大宽度小于各所述棱镜的跨度的1.5倍；各所述棱镜的跨度为所述棱镜的主截面中靠近所述导光板基材一侧的底边。
  2. 如权利要求1所述的导光板，其中，所述网点的最大宽度大于所述棱镜的跨度的0.5倍。
  3. 如权利要求2所述的导光板，其中，所述棱镜为三棱镜，且所述三棱镜的主截面中除所述底边外的另外两个边的边长相等；
    所述网点的最大宽度满足以下关系式：
    H/tanα＜D＜3H/tanα；
    其中，D表示所述网点的最大宽度；H表示所述三棱镜的主截面中所述底边对应的高，α表示所述主截面中的底角。
  4. 如权利要求1所述的导光板，其中，所述棱镜凸出于所述导光板基材在所述出光面一侧的表面；
    所述网点凸出于所述导光板基材在所述网点面一侧的表面。
  5. 如权利要求1所述的导光板，其中，所述棱镜凸出于所述导光板基材在所述出光面一侧的表面；
    所述网点凹陷于所述导光板基材在所述网点面一侧的表面。
  6. 如权利要求1所述的导光板，其中，所述棱镜凹陷于所述导光板基材在所述出光面一侧的表面；
    所述网点凸出于所述导光板基材在所述网点面一侧的表面。
  7. 如权利要求1所述的导光板，其中，所述棱镜凹陷于所述导光板基材在所述出光面一侧的表面；
    所述网点凹陷于所述导光板基材在所述网点面一侧的表面。
  8. 如权利要求1～7任一项所述的导光板，其中，多个所述网点呈阵列排布；
    一个所述棱镜对应于一行或一列的所述网点。
  9. 如权利要求8所述的导光板，其中，所述网点的形状为圆形、椭圆形或多边形。
  10. 一种背光模组，包括：如权利要求1～9任一项所述的导光板。
  11. 如权利要求10所述的背光模组，其中，还包括：位于所述导光板侧面的光源，以及位于所述导光板的网点面一侧的反射板。
  12. 如权利要求11所述的背光模组，其中，还包括：位于所述导光板的出光面一侧的背板框架，位于所述导光板的网点面一侧的背板；
    所述背板框架在所述导光板出光面一侧的边缘在所述导光板的出光面上的正投影与所述导光板的出光面上的棱镜在所述导光板的出光面上的正投影存在交叠。
  13. 如权利要求12所述的背光模组，其中，所述网点面上的网点在所述导光板的出光面上的正投影与所述背板框架在所述导光板出光面一侧的边缘在所述导光板出光面上的正投影存在交叠。
  14. 如权利要求13所示的背光模组，其中，所述网点面上的至少两行网点在所述导光板的出光面上的正投影与所述背板框架在所述导光板出光面一侧的边缘在所述导光板出光面上的正投影存在交叠。
  15. 一种显示装置，包括：如权利要求10～14任一项所述的背光模组。
  16. 如权利要求15所示的显示装置，其中，还包括：位于所述导光板的出光面一侧的显示面板。
PCT/CN2019/107914 2018-09-29 2019-09-25 导光板、背光模组及显示装置 WO2020063682A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100208493A1 (en) * 2009-02-18 2010-08-19 Samsung Electronics Co., Ltd. Light guide plate and display apparatus comprising the same
CN102367934A (zh) * 2011-08-18 2012-03-07 友达光电股份有限公司 背光模块及其对位方法
CN105511012A (zh) * 2016-02-25 2016-04-20 福州大学 一种用于实现偏振准直面光源的导光结构
CN105676340A (zh) * 2016-02-25 2016-06-15 福州大学 一种复合抛物反射微准直透镜的偏振复用导光结构及其实现方法
CN105891940A (zh) * 2016-06-21 2016-08-24 京东方科技集团股份有限公司 一种导光板及背光源模组、显示装置
CN206725804U (zh) * 2017-02-12 2017-12-08 广州市鸿益塑料有限公司 一种具有双锥形棱镜结构的导光板

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100208493A1 (en) * 2009-02-18 2010-08-19 Samsung Electronics Co., Ltd. Light guide plate and display apparatus comprising the same
CN102367934A (zh) * 2011-08-18 2012-03-07 友达光电股份有限公司 背光模块及其对位方法
CN105511012A (zh) * 2016-02-25 2016-04-20 福州大学 一种用于实现偏振准直面光源的导光结构
CN105676340A (zh) * 2016-02-25 2016-06-15 福州大学 一种复合抛物反射微准直透镜的偏振复用导光结构及其实现方法
CN105891940A (zh) * 2016-06-21 2016-08-24 京东方科技集团股份有限公司 一种导光板及背光源模组、显示装置
CN206725804U (zh) * 2017-02-12 2017-12-08 广州市鸿益塑料有限公司 一种具有双锥形棱镜结构的导光板

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