WO2020187282A1 - Light-directing reflective plate, backlight module and display device - Google Patents

Light-directing reflective plate, backlight module and display device Download PDF

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Publication number
WO2020187282A1
WO2020187282A1 PCT/CN2020/080128 CN2020080128W WO2020187282A1 WO 2020187282 A1 WO2020187282 A1 WO 2020187282A1 CN 2020080128 W CN2020080128 W CN 2020080128W WO 2020187282 A1 WO2020187282 A1 WO 2020187282A1
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Prior art keywords
reflective
light guiding
guiding properties
reflective sheet
light
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PCT/CN2020/080128
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French (fr)
Chinese (zh)
Inventor
潘杰华
闫延超
胡萌萌
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深圳Tcl新技术有限公司
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Publication of WO2020187282A1 publication Critical patent/WO2020187282A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

Definitions

  • the present disclosure relates to the field of backlight modules, and in particular to a reflective sheet, backlight module and display device with light guiding properties.
  • the backlight module in the display module includes a light bar, a reflector, a light guide plate, a diffuser, a brightness enhancement film, a diffuser, etc.
  • the main function of the reflector is to reflect light and improve light utilization.
  • the traditionally used reflective sheet is coated with reflective particles 2 on the surface of the substrate 1 to form an irregular structure.
  • Figure 1 (top view) and Figure 2 (cross-sectional view) show the structure and distribution of the reflective particles 2 of the coating layer.
  • the structure has a divergent diffuse reflection effect on light. The direction of light reflection is random and non-guided.
  • the purpose of the present disclosure is to provide a reflective sheet, backlight module and display device with light guiding properties, which aims to solve the problem that the direction of light reflected by the existing reflective sheet is random and non-directed. Type of problem.
  • a reflective sheet with light guiding properties includes a substrate and reflective particles, and further includes a reflective surface arranged periodically, the reflective surface is arranged on the substrate, and the reflective particles are distributed on the reflective surface.
  • the reflective surface is formed by parallel arrangement of protrusions with a triangular cross section, and the inclined surface of the protrusions is the reflective surface.
  • the top corners of the protrusions are rounded.
  • the base angle of the triangular protrusion is an acute angle.
  • one side in the longitudinal direction of the reflective surface is in contact with the base.
  • the included angle between two adjacent triangular protrusions is an acute angle.
  • the heights of the triangular protrusions are equal.
  • the reflective sheet with light guiding properties wherein the substrate is a PET substrate.
  • the reflective sheet with light guiding properties wherein a resin layer is provided between the substrate and the reflective particles.
  • the reflective surface is prepared by molding.
  • the reflective surface is formed by parallel arrangement of grooves with a "concave" cross-section, and the side walls of the grooves are reflective surfaces.
  • the depths of the "concave"-shaped grooves are equal.
  • the opening widths of the "concave"-shaped grooves are equal.
  • a backlight module adopts the above-mentioned reflective sheet with light guiding properties as a reflective film.
  • a display device includes the above-mentioned backlight module.
  • the present disclosure provides a reflective sheet with light guiding properties as described above.
  • reflective particles are arranged on a reflective surface that is periodically arranged.
  • the structure has certain guiding properties for light and can increase light.
  • the number of transmissions in a specific direction greatly improves the brightness of the light in that direction, and achieves the effect of large-distance transmission, which can meet the needs of reducing the number of LEDs and increasing the gap between the light bars, and thus reduce the number of lights.
  • Figure 1 is a distribution diagram of reflective particles on the surface of a reflective sheet in the prior art.
  • Figure 2 is a cross-sectional view of a prior art reflector.
  • FIG 3 is a cross-sectional view of an embodiment of the reflective sheet with light guiding properties of the present disclosure.
  • FIG. 4 is a distribution diagram of reflective particles on the surface of the reflective sheet of the present disclosure.
  • Fig. 5 is a perspective view (partial view) of the reflective surface of the reflective sheet of the present disclosure.
  • FIG. 6 is a cross-sectional view of another embodiment of the reflective sheet with light guiding properties of the present disclosure.
  • the present disclosure provides a reflective sheet, a backlight module, and a display device with light guiding properties.
  • a reflective sheet a backlight module
  • a display device with light guiding properties.
  • the present disclosure provides a preferred embodiment of a reflective sheet with light guiding properties, as shown in Figures 3 and 4, comprising a substrate 1, reflective particles 2 and a reflective surface 3 arranged periodically.
  • the reflective surface 3 is arranged on On the substrate 1, the reflective particles 2 are distributed on the reflective surface 3.
  • the periodically arranged reflective surface 3 may be formed by parallel arrangement of protrusions with a triangular cross section.
  • the inclined surfaces of the protrusions reflect Function; the periodically arranged reflecting surface 3 can also be formed by parallel arrangement of grooves with a "concave" cross-section.
  • the groove walls are inclined surfaces to play a reflective role.
  • a layer of resin and reflective particles 2 can be sequentially coated on the PET substrate, and then molded through a mold to form the reflective surface 3 arranged periodically.
  • the periodically arranged reflective surfaces 3 have certain guiding properties for light in a specific direction, and can increase the amount of light propagating in a specific direction.
  • the top corners of the protrusions are preferably rounded corners, which can reduce the scratches of other components caused by the sharp corners of the reflective sheet, and also reduce the wear of the reflective sheet itself.
  • the reflective particles are arranged on the reflective surface arranged periodically, and the traditional diffuse reflection surface of the non-guided diffuser sheet is improved to the diffuse reflective surface arranged periodically, which can increase the amount of light propagating in a single direction.
  • the traditional diffuse reflection surface of the non-guided diffuser sheet is improved to the diffuse reflective surface arranged periodically, which can increase the amount of light propagating in a single direction.
  • the present disclosure also provides a backlight module.
  • the backlight module using the reflective sheet can reduce the number of LEDs used and reduce the cost.
  • the present disclosure also provides a display device.
  • the display device adopting the backlight module has low cost and is more competitive in the market.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

A light-directing reflective plate, a backlight module and a display device, wherein: a light-directing reflective plate comprising a base (1) and reflective particles (2), and additionally comprising a periodically-arranged reflective surface (3), the reflective surface (3) being disposed on the base (1), and the reflective particles (2) being distributed on the reflective surface (3). The reflective plate has a certain directing effect on rays of light, and is capable of increasing the number of rays of light transmitted in a specific direction, thus greatly increasing optical brightness in said direction and achieving the effect of long-distance transmission, and thereby being able to satisfy the requirements of reducing a number of LEDs and causing the spacing between lamp strips to be greater and greater, and thus reducing lamp strip cost and increasing product competitiveness.

Description

一种具有光导向性的反射片、背光模组及显示装置Reflective sheet, backlight module and display device with light guiding properties
优先权priority
所述PCT专利申请要求申请日为2019年3月20日，申请号为201920357987.0的中国专利优先权，本专利申请结合了上述专利的技术方案。The PCT patent application requires that the filing date is March 20, 2019, and the application number is 201920357987.0 Chinese patent priority. This patent application combines the technical solutions of the above patents.
技术领域Technical field
本公开涉及背光模组领域，尤其涉及一种具有光导向性的反射片、背光模组及显示装置。The present disclosure relates to the field of backlight modules, and in particular to a reflective sheet, backlight module and display device with light guiding properties.
背景技术Background technique
显示模组中的背光模组包含了灯条、反射片、导光板、扩散板、增光片、扩散片等，反射片的主要作用就是进行光的反射，提高光的利用率。The backlight module in the display module includes a light bar, a reflector, a light guide plate, a diffuser, a brightness enhancement film, a diffuser, etc. The main function of the reflector is to reflect light and improve light utilization.
目前传统所用的反射片，是在基底1的表面涂布反射粒子2、形成不规则结构，图1(俯视图)和图2(剖面图)显示了涂布层反射粒子2的构造及分布，该结构对光具有发散型的漫反射作用。光的反射方向是随机的，无导向型。At present, the traditionally used reflective sheet is coated with reflective particles 2 on the surface of the substrate 1 to form an irregular structure. Figure 1 (top view) and Figure 2 (cross-sectional view) show the structure and distribution of the reflective particles 2 of the coating layer. The structure has a divergent diffuse reflection effect on light. The direction of light reflection is random and non-guided.
然而，随着LED发光效率及功率的提升，背光模组中使用的LED数量越来越少，灯与灯之间的间隙越来越大，传统发散型漫反射的反射片已无法满足大间隙等间距的发展需求，需要有方向导向性反射片引导光线走向。However, with the improvement of LED luminous efficiency and power, the number of LEDs used in the backlight module is decreasing, and the gap between the lamp and the lamp is getting larger and larger. The traditional divergent diffuse reflection reflector can no longer meet the large gap. The development needs of equal spacing require a directional guide reflector to guide the light.
因此，现有技术还有待于改进和发展。Therefore, the existing technology needs to be improved and developed.
公开内容Public content
鉴于上述现有技术的不足，本公开的目的在于提供一种具有光导向性的反射片、背光模组及显示装置，旨在解决现有的反射片反射的光的方向是随机的、无导向型的问题。In view of the above-mentioned shortcomings of the prior art, the purpose of the present disclosure is to provide a reflective sheet, backlight module and display device with light guiding properties, which aims to solve the problem that the direction of light reflected by the existing reflective sheet is random and non-directed. Type of problem.
本公开的技术方案如下：The technical solutions of the present disclosure are as follows:
一种具有光导向性的反射片，包括基底和反射粒子，还包括呈周期性排列的反射面，所述反射面设置在所述基底上，所述反射粒子分布在所述反射面上。A reflective sheet with light guiding properties includes a substrate and reflective particles, and further includes a reflective surface arranged periodically, the reflective surface is arranged on the substrate, and the reflective particles are distributed on the reflective surface.
所述的具有光导向性的反射片，其中，所述反射面由截面为三角形的凸起平 行排列形成，所述凸起的斜面为反射面。In the reflective sheet with light guiding properties, the reflective surface is formed by parallel arrangement of protrusions with a triangular cross section, and the inclined surface of the protrusions is the reflective surface.
所述的具有光导向性的反射片，其中，所述凸起的顶角倒有圆角。In the reflective sheet with light guiding properties, the top corners of the protrusions are rounded.
所述的具有光导向性的反射片，其中，所述三角形的凸起的底角为锐角。In the reflective sheet with light guiding properties, the base angle of the triangular protrusion is an acute angle.
所述的具有光导向性的反射片，其中，所述反射面的长度方向上的一边与所述基底相接。In the reflective sheet with light guiding properties, one side in the longitudinal direction of the reflective surface is in contact with the base.
所述的具有光导向性的反射片，其中，相邻的两三角形凸起之间的夹角为锐角。In the reflective sheet with light guiding properties, the included angle between two adjacent triangular protrusions is an acute angle.
所述的具有光导向性的反射片，其中，所述三角形的凸起的高度相等。In the reflective sheet with light guiding properties, the heights of the triangular protrusions are equal.
所述的具有光导向性的反射片，其中，所述基底为PET基底。The reflective sheet with light guiding properties, wherein the substrate is a PET substrate.
所述的具有光导向性的反射片，其中，所述基底与所述反射粒子之间设置有树脂层。The reflective sheet with light guiding properties, wherein a resin layer is provided between the substrate and the reflective particles.
所述的具有光导向性的反射片，其中，所述反射面是通过模具成型制备得到。In the reflective sheet with light guiding properties, the reflective surface is prepared by molding.
所述的具有光导向性的反射片，其中，所述反射面由截面为“凹”形的槽平行排列而成，槽的侧壁为反射面。In the reflective sheet with light guiding properties, the reflective surface is formed by parallel arrangement of grooves with a "concave" cross-section, and the side walls of the grooves are reflective surfaces.
所述的具有光导向性的反射片，其中，所述“凹”形的槽的深度相等。In the reflective sheet with light guiding properties, the depths of the "concave"-shaped grooves are equal.
所述的具有光导向性的反射片，其中，所述“凹”形的槽的开口宽度相等。In the reflective sheet with light guiding properties, the opening widths of the "concave"-shaped grooves are equal.
一种背光模组，采用如上所述的具有光导向性的反射片作为反射膜。A backlight module adopts the above-mentioned reflective sheet with light guiding properties as a reflective film.
一种显示装置，包括如上所述的背光模组。A display device includes the above-mentioned backlight module.
有益效果：本公开提供了一种如上所述的具有光导向性的反射片，本公开将反射粒子设置在呈周期性排列的反射面上，该结构对光线具有一定的导向性，可以增加光线在特定方向上的传播数量，极大提高该方向上的光亮度，达到大距离传播的效果，从而可以满足LED数量减少、灯条间的间隙越来越大的需求，并能因此而降低灯条成本，提高产品竞争力。Beneficial effects: The present disclosure provides a reflective sheet with light guiding properties as described above. In the present disclosure, reflective particles are arranged on a reflective surface that is periodically arranged. The structure has certain guiding properties for light and can increase light. The number of transmissions in a specific direction greatly improves the brightness of the light in that direction, and achieves the effect of large-distance transmission, which can meet the needs of reducing the number of LEDs and increasing the gap between the light bars, and thus reduce the number of lights. Article costs and improve product competitiveness.
附图说明Description of the drawings
图1为现有技术的反射片表面的反射粒子分布图。Figure 1 is a distribution diagram of reflective particles on the surface of a reflective sheet in the prior art.
图2为现有技术的反射片截面图。Figure 2 is a cross-sectional view of a prior art reflector.
图3为本公开的具有光导向性的反射片的一种实施方式截面图。3 is a cross-sectional view of an embodiment of the reflective sheet with light guiding properties of the present disclosure.
图4为本公开的反射片表面的反射粒子分布图。4 is a distribution diagram of reflective particles on the surface of the reflective sheet of the present disclosure.
图5为本公开的反射片的反射面立体图(局部视图)。Fig. 5 is a perspective view (partial view) of the reflective surface of the reflective sheet of the present disclosure.
图6为本公开的具有光导向性的反射片的另一种实施方式截面图。6 is a cross-sectional view of another embodiment of the reflective sheet with light guiding properties of the present disclosure.
具体实施方式detailed description
本公开提供了一种具有光导向性的反射片、背光模组及显示装置，为使本公开的目的、技术方案及效果更加清楚、明确，以下对本公开进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本公开，并不用于限定本公开。The present disclosure provides a reflective sheet, a backlight module, and a display device with light guiding properties. In order to make the objectives, technical solutions, and effects of the present disclosure clearer and clearer, the present disclosure will be described in further detail below. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, but not used to limit the present disclosure.
本公开提供的一种具有光导向性的反射片的较佳实施例，如图3和图4所示，包括基底1、反射粒子2和呈周期性排列的反射面3，反射面3设置在基底1上，反射粒子2分布在反射面3上，周期性排列的反射面3可以是由截面为三角形的凸起平行排列而成，如图5立体图所示，所述凸起的斜面起反射作用；周期性排列的反射面3还可以是由截面为“凹”形的槽平行排列而成，如图6的截面图所示，槽壁为斜面，起反射作用。具体实施时，可以在PET基底上依次涂布一层树脂以及反射粒子2，然后通过模具成型，形成周期性排列的反射面3。周期性排列的反射面3对光线在特定方向上具有一定的导向性，可以增加光线在特定方向上的传播数量。对于截面为三角形的凸起，凸起的顶角优选为圆角，可以减少反射片的尖角对其他部件的擦伤，同时也可减少反射片的自身的磨损。The present disclosure provides a preferred embodiment of a reflective sheet with light guiding properties, as shown in Figures 3 and 4, comprising a substrate 1, reflective particles 2 and a reflective surface 3 arranged periodically. The reflective surface 3 is arranged on On the substrate 1, the reflective particles 2 are distributed on the reflective surface 3. The periodically arranged reflective surface 3 may be formed by parallel arrangement of protrusions with a triangular cross section. As shown in the three-dimensional view of FIG. 5, the inclined surfaces of the protrusions reflect Function; the periodically arranged reflecting surface 3 can also be formed by parallel arrangement of grooves with a "concave" cross-section. As shown in the cross-sectional view of FIG. 6, the groove walls are inclined surfaces to play a reflective role. In specific implementation, a layer of resin and reflective particles 2 can be sequentially coated on the PET substrate, and then molded through a mold to form the reflective surface 3 arranged periodically. The periodically arranged reflective surfaces 3 have certain guiding properties for light in a specific direction, and can increase the amount of light propagating in a specific direction. For protrusions with a triangular cross-section, the top corners of the protrusions are preferably rounded corners, which can reduce the scratches of other components caused by the sharp corners of the reflective sheet, and also reduce the wear of the reflective sheet itself.
本公开将反射粒子设置在呈周期性排列的反射面上，将传统的散射片无导向型的漫反射表面改进为呈周期性排列的漫反射表面，可以增加光线在单一方向上的传播数量，极大提高某一方向的光亮度，达到大距离传播的效果，从而可以满足LED数量减少、灯条间的间隙越来越大的需求，并能因此而降低灯条成本，提高产品竞争力。In the present disclosure, the reflective particles are arranged on the reflective surface arranged periodically, and the traditional diffuse reflection surface of the non-guided diffuser sheet is improved to the diffuse reflective surface arranged periodically, which can increase the amount of light propagating in a single direction. Greatly improve the brightness of a certain direction to achieve the effect of large-distance transmission, which can meet the needs of reducing the number of LEDs and increasing the gap between the light bars, and thus reduce the cost of the light bar and improve product competitiveness.
基于上述具有光导向性的反射片，本公开还提供了一种背光模组，采用该反射片的背光模组可以减少LED的使用数量，降低成本。Based on the above-mentioned reflective sheet with light guiding properties, the present disclosure also provides a backlight module. The backlight module using the reflective sheet can reduce the number of LEDs used and reduce the cost.
基于上述背光模组，本公开还提供了一种显示装置，采用本背光模组的显示装置成本低，更具市场竞争力。Based on the above-mentioned backlight module, the present disclosure also provides a display device. The display device adopting the backlight module has low cost and is more competitive in the market.
应当理解的是，本公开的应用不限于上述的举例，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，所有这些改进和变换都应属于本公开所附权利要求的保护范围。It should be understood that the application of the present disclosure is not limited to the above examples, and those of ordinary skill in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present disclosure.

Claims (15)

  1. 一种具有光导向性的反射片，包括基底和反射粒子，其中，还包括呈周期性排列的反射面，所述反射面设置在所述基底上，所述反射粒子分布在所述反射面上。A reflective sheet with light guiding properties, comprising a substrate and reflective particles, wherein the reflective surface is arranged periodically, the reflective surface is arranged on the substrate, and the reflective particles are distributed on the reflective surface .
  2. 根据权利要求1所述的具有光导向性的反射片，其中，所述反射面由截面为三角形的凸起平行排列形成，所述凸起的斜面为反射面。The reflective sheet with light guiding properties according to claim 1, wherein the reflective surface is formed by arranging the protrusions with a triangular cross section in parallel, and the inclined surface of the protrusions is the reflective surface.
  3. 根据权利要求2所述的具有光导向性的反射片，其中，所述凸起的顶角倒有圆角。The reflective sheet with light guiding properties of claim 2, wherein the top corners of the protrusions are rounded.
  4. 根据权利要求2所述的具有光导向性的反射片，其中，所述三角形的凸起的底角为锐角。The reflective sheet with light guiding properties according to claim 2, wherein the base angle of the triangular protrusion is an acute angle.
  5. 根据权利要求2所述的具有光导向性的反射片，其中，所述反射面的长度方向上的一边与所述基底相接。The reflective sheet with light guiding properties according to claim 2, wherein one side in the longitudinal direction of the reflective surface is in contact with the base.
  6. 根据权利要求5所述的具有光导向性的反射片，其中，相邻的两三角形凸起之间的夹角为锐角。The reflective sheet with light guiding properties of claim 5, wherein the angle between two adjacent triangular protrusions is an acute angle.
  7. 根据权利要求2所述的具有光导向性的反射片，其中，所述三角形的凸起的高度相等。The reflective sheet with light guiding properties according to claim 2, wherein the heights of the triangular protrusions are equal.
  8. 根据权要求1所述的具有光导向性的反射片，其中，所述基底为PET基底。The reflective sheet with light guiding properties according to claim 1, wherein the substrate is a PET substrate.
  9. 根据权要求1所述的具有光导向性的反射片，其中，所述基底与所述反射粒子之间设置有树脂层。The reflective sheet with light guiding properties according to claim 1, wherein a resin layer is provided between the substrate and the reflective particles.
  10. 根据权要求1所述的具有光导向性的反射片，其中，所述反射面是通过模具成型制备得到。The reflective sheet with light guiding properties of claim 1, wherein the reflective surface is prepared by molding.
  11. 根据权利要求1所述的具有光导向性的反射片，其中，所述反射面由截面为“凹”形的槽平行排列而成，槽的侧壁为反射面。The reflective sheet with light guiding properties according to claim 1, wherein the reflective surface is formed by parallel arrangement of grooves with a "concave" cross section, and the side walls of the grooves are reflective surfaces.
  12. 根据权利要求10所述的具有光导向性的反射片，其中，所述“凹”形的槽的深度相等。The reflective sheet with light guiding properties of claim 10, wherein the depths of the "concave"-shaped grooves are equal.
  13. 根据权利要求10所述的具有光导向性的反射片，其中，所述“凹”形的槽的开口宽度相等。The reflective sheet with light guiding properties of claim 10, wherein the opening widths of the "concave"-shaped grooves are equal.
  14. 一种背光模组，其中，包括权利要求1-13任一所述的具有光导向性的反射片作为反射膜。A backlight module, which comprises the light-directing reflective sheet of any one of claims 1-13 as a reflective film.
  15. 一种显示装置，其中，包括权利要求14所述的背光模组。A display device, comprising the backlight module of claim 14.
PCT/CN2020/080128 2019-03-20 2020-03-19 Light-directing reflective plate, backlight module and display device WO2020187282A1 (en)

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CN209624814U (en) * 2019-03-20 2019-11-12 深圳Tcl新技术有限公司 A kind of reflector plate with light guide tropism, backlight module and display device

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