WO2020073445A1 - 柔性显示装置及其背光模块 - Google Patents

柔性显示装置及其背光模块 Download PDF

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Publication number
WO2020073445A1
WO2020073445A1 PCT/CN2018/117513 CN2018117513W WO2020073445A1 WO 2020073445 A1 WO2020073445 A1 WO 2020073445A1 CN 2018117513 W CN2018117513 W CN 2018117513W WO 2020073445 A1 WO2020073445 A1 WO 2020073445A1
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WIPO (PCT)
Prior art keywords
backlight module
guide plate
light guide
flexible display
display device
Prior art date
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Ceased
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PCT/CN2018/117513
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English (en)
French (fr)
Inventor
张鹏
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to US16/472,078 priority Critical patent/US20200408983A1/en
Publication of WO2020073445A1 publication Critical patent/WO2020073445A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • 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
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—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
    • G02B6/005—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
    • G02B6/0051—Diffusing 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
    • G02B6/005—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

Definitions

  • the invention relates to a backlight module of a flexible display device, in particular to a backlight module of a flexible display device which can be directed to improve the brightness of the viewing angle.
  • FIG. 1 is a perspective schematic view of a backlight module of a conventional flexible display device.
  • the backlight module 100 of an existing flexible display device mainly includes a light guide plate 110 for providing a backlight required for a flexible display screen or a curved display screen (not shown) Features.
  • FIG. 1 shows an XYZ coordinate system, in which the two sides of the light guide plate 110 are parallel to the X-axis and Y-axis directions, and perpendicular to the X-axis and Y-axis.
  • the XY plane is the Z axis direction.
  • a reflective sheet 120 is provided below the light guide plate 110, at least one light source 130 is provided on the side of the light guide plate 110, and the at least one light source 130 is emitted from the side of the light guide plate 110
  • the light rays are directed toward the upper side of the light guide plate 110 (in the direction of the Y axis) by the total reflection effect inside the light guide plate 110 and the reflection effect of the reflection sheet 120 Light.
  • an optical film group 140 is further provided above the light guide plate 110, and the optical film group 140 mainly includes a diffusion film (Diffuser Film) 141 and two brightness enhancement films (Brightness Enhancement Film; BEF).
  • the brightness enhancement film is a first brightness enhancement film 142 and a second brightness enhancement film 143, wherein a plurality of elongated prisms (Prism) are arranged on the first brightness enhancement film 142 and the second brightness enhancement film 143 respectively ) 142a, 143a, these prisms have the effect of converging the light upward. Therefore, the light emitted upward from the light guide plate 110 diffuses through the diffusion film 141 first, and then passes through the first brightness enhancement film 142 and the second brightness enhancement film 143 to converge the light.
  • the general approach is to make the prism direction of the second brightness enhancement film 143 and the prism direction of the first brightness enhancement film 142 perpendicular to each other, so as to balance the light difference of the brightness enhancement film in different directions .
  • the above method can balance the difference of light in different directions, it also reduces the overall light viewing angle of the backlight module 100 on the XY plane. Therefore, when the backlight module 100 is applied to a flexible or curved display When the device is installed, the viewing angle of the light may be smaller at a position where the display device is bent, that is, having a curvature, thereby reducing the brightness of the light at this position, thereby affecting the display effect of the display device.
  • the main object of the present invention is to provide a backlight module of a flexible display device, which includes a single brightness enhancement film, and when the flexible display device is bent or forms a curved display, the brightness enhancement film can provide better viewing angle brightness.
  • the present invention provides a backlight module for a flexible display device, which includes:
  • a reflective sheet is provided under the light guide plate.
  • At least one light source is provided on the side of the light guide plate.
  • the extending direction of the prism of the prism sheet is the same as the bending direction of the backlight module.
  • the present invention also provides a backlight module of a flexible display device, which includes: a light guide plate; and an optical film set disposed above the light guide plate, the optical film set including a single Brightening film.
  • a reflective sheet is provided under the light guide plate.
  • At least one light source is provided on the side of the light guide plate.
  • the optical film set includes a diffusion film, and the diffusion film is disposed below the brightness enhancement film.
  • the brightness enhancement film is a prism sheet.
  • the extending direction of the prism of the prism sheet is the same as the bending direction of the backlight module.
  • the present invention also provides a flexible display device including a flexible display screen and a backlight module, the backlight module is disposed below the flexible display screen, the backlight module includes: a light guide plate; and An optical film group is disposed above the light guide plate, and the optical film group includes a single brightness enhancement film.
  • a reflective sheet is provided under the light guide plate; and at least one light source is provided on the side of the light guide plate.
  • the optical film set includes a diffusion film, and the diffusion film is disposed below the brightness enhancement film.
  • the brightness enhancement film is a prism sheet, and the extending direction of the prism of the prism sheet is the same as the bending direction of the backlight module of the flexible display device.
  • the single brightness enhancement film of the present invention has a larger viewing angle of light in orientation, and therefore can achieve the effect of orientation to increase the viewing angle brightness and improve the viewing angle brightness. Uniformity, thereby improving the overall display effect of the flexible display device.
  • Figure 1 A perspective schematic view of a backlight module of a conventional flexible display device.
  • Figure 2 A perspective schematic view of a backlight module of a flexible display device of the present invention.
  • Figure 3 A schematic side view of a backlight module of the present invention (on the YZ plane).
  • Figure 4 A schematic side view of the backlight module of the present invention (on the XZ plane).
  • Figure 5 A schematic top view of a backlight module of the present invention (on the XY plane).
  • Figure 6 A schematic side view of the flexible display device of the present invention (on the XZ plane).
  • FIG. 2 is a perspective schematic view of a backlight module of a flexible display device of the present invention.
  • the backlight module 200 of a flexible display device of the present invention mainly includes a light guide plate 210 to provide a backlight function required for a flexible display screen or a curved display screen (not shown).
  • FIG. 2 shows an XYZ coordinate system.
  • the two sides of the light guide plate 210 are parallel to the X-axis and Y-axis directions, and perpendicular to the XY formed by the X-axis and Y-axis.
  • the plane is the Z axis direction.
  • a reflective sheet 220 is provided below the light guide plate 210, at least one light source 230 is provided on the side of the light guide plate 210, and the at least one light source 230 is emitted from the side of the light guide plate 210
  • the light rays are directed toward the top of the light guide plate 210 (in the direction of the Y axis) by the total reflection inside the light guide plate 210 and the reflection effect of the reflection sheet 220 Light.
  • an optical film group 240 is also provided above the light guide plate 210, and the optical film group 240 mainly includes a diffuser film (Diffuser Film) 241 and a single brightness enhancement film (BEF) 242, A plurality of elongated prisms 242a are arranged on the brightness enhancing film 242, and the plurality of elongated prisms 242a are arranged along the Y-axis direction and extend along the X-axis direction. These prisms 242a have a function of converging light upward. Effect. Therefore, the light emitted upward by the light guide plate 210 can be first diffused through the diffusion film 241, and then converged by the brightness enhancement film 242. However, in general, since the prism has directivity, the light-concentrating film has different effects of light convergence in different directions.
  • FIG. 3 is a schematic side view of a backlight module of the present invention (on the YZ plane).
  • the diffusion film 241 is omitted, and
  • the light source under the brightness enhancement film 242 is directly represented by the light guide plate 210.
  • the plurality of elongated prisms 242a on the brightness enhancement film 242 are arranged along the Y-axis direction, it has better light convergence effect on the YZ plane, but also makes the light viewing angle smaller.
  • the half angle of view ⁇ 1 of light is 35 degrees.
  • FIG. 4 is a schematic side view of a backlight module of the present invention (on the XZ plane).
  • the diffusion film 241 is omitted,
  • the light source under the brightness enhancement film 242 is directly represented by the light guide plate 210.
  • the plurality of elongated prisms 242a on the brightness enhancement film 242 extend along the X-axis direction, the light convergence effect in the XZ plane is poor, but the light viewing angle is also large, for example The half angle of view ⁇ 2 of the light is 52 degrees.
  • FIG. 5 is a schematic top view (on the XY plane) of a backlight module of the present invention.
  • the viewer has a larger viewing angle (for example, a half viewing angle of 52 degrees) in the horizontal line of sight H (parallel X axis) of the viewer;
  • the viewing angle of light is small (for example, the half viewing angle is 35 degrees).
  • FIG. 6 is a schematic side view (on the XZ plane) of a flexible display device of the present invention.
  • the backlight module 200 is disposed below a flexible display 300 to form a flexible display device, and it can be known from the description of FIGS. 3 to 5 that the brightness enhancement film 242 is on the XZ plane
  • the viewing angle of the light is large, that is, the viewing angle of the viewer's horizontal line of sight H (parallel X axis) is large.
  • the prism extension direction of the prism sheet (refer to the X-axis direction of FIG. 5) and the bending direction of the flexible display device are also That is, when the bending direction of the backlight module is the same direction (refer to the X-axis direction in FIG. 6), a viewer who is one distance in front of the curved portion of the display can obtain the same orientation (horizontal line of sight).
  • a large viewing angle of light (for example, a half viewing angle of 52 degrees) can therefore achieve the effect of directionally increasing the viewing angle brightness and the uniformity of the viewing angle brightness, thereby improving the overall display effect of the flexible display device.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种柔性显示装置其背光模块(200)，背光模块(200)包含一导光板(210)及一光学膜片组(240)，光学膜片组(240)包含单一个增亮膜(242)。增亮膜(242)是一棱镜片(242)，棱镜片(242)的棱镜延伸方向与背光模块(200)的弯曲方向同一方向。单一个增亮膜(242)在定向上具有较大的光线视角，因此可达到定向提高视角亮度的效果，并提高视角亮度的均匀性，从而提升柔性显示装置的整体显示效果。

Description

柔性显示装置及其背光模块 技术领域
本发明涉及一种柔性显示装置其背光模块，特别是涉及一种可定向提高视角亮度的柔性显示装置其背光模块。
 背景技术
随着柔性显示及曲面显示装置的发展，在各种固定曲率或者不固定曲率的使用状况下，对于柔性及曲面显示装置的视角的要求也越来越高。
请参照图1所示，图1是现有的一种柔性显示装置的背光模块的立体示意图。如图1所示，现有的一种柔性显示装置的背光模块100主要包含一导光板110，所述导光板110用于提供一柔性显示屏或曲面显示屏(未绘示)所需要的背光功能。再者，为了说明上的方便，图1显示一个XYZ座标系统，其中所述导光板110 的两个侧边分别平行于X轴与Y轴方向，另外垂直于X轴与Y轴所形成的XY平面的是Z轴方向。
如图1所示，所述导光板110的下方设有一反射片120，所述导光板110的侧方设有至少一光源130，所述至少一光源130由所述导光板110的侧方发射光线，通过所述导光板110内部的全反射作用及所述反射片120的反射作用，将所述至少一光源130发出的光线转向所述导光板110的上方(Y轴向上的方向)发出光线。
此外，所述导光板110的上方还设有一光学膜片组140，所述光学膜片组140主要包含一扩散膜(Diffuser Film)141及两张增亮膜(Brightness Enhancement Film; BEF)，所述两张增亮膜为一第一增亮膜142及一第二增亮膜143，其中所述第一增亮膜142及所述第二增亮膜143上分别排列设置有多个长条状棱镜(Prism)142a,143a，这些棱镜具有使光线向上收敛的效果。因此，所述导光板110向上发出的光线先通过所述扩散膜141进行光线扩散，接着再通过所述第一增亮膜142及所述第二增亮膜143使所述光线收敛。
一般来说，由于棱镜具有方向性，因此使得所述增亮膜在不同方向上的光线收敛效果不同。为了解决这种差异，一般作法是使所述第二增亮膜143的棱镜方向与所述第一增亮膜142的棱镜方向相互垂直，藉以平衡上述增亮膜在不同方向上的光线差异问题。
然而，上述方法虽然可以平衡光线在不同方向上的差异，但也使得所述背光模块100在XY平面上的整体光线视角被减小，因此当所述背光模块100被应用于一柔性或曲面显示装置时，在所述显示装置弯曲之处，即具有曲率的位置上，所述光线视角可能更小，因而使得在此位置上的光线亮度降低，从而影响显示装置的显示效果。
因此，有必要提供一种改良的柔性显示装置及其背光模块，以解决上述技术问题。
 技术问题
本发明的主要目的是提供一种柔性显示装置其背光模块，其包含单一个增亮膜，当所述柔性显示装置弯曲或形成曲面显示器时，所述增亮膜可提供较好的视角亮度。
 技术解决方案
为达上述目的，本发明提供一种柔性显示装置的背光模块，其包含：
一导光板；及一光学膜片组，设于所述导光板的上方，所述光学膜片组包含单一个增亮膜及一扩散膜，所述增亮膜是一棱镜片，所述扩散膜设于所述增亮膜的下方。
在本发明的一实施例中，所述导光板的下方设有一反射片。
在本发明的一实施例中，所述导光板的侧方设有至少一光源。
在本发明的一实施例中，所述棱镜片的棱镜延伸方向与所述背光模块的弯曲方向同一方向。
为达上述目的，本发明另提供一种柔性显示装置的背光模块，其包含：一导光板；及一光学膜片组，设于所述导光板的上方，所述光学膜片组包含单一个增亮膜。
在本发明的一实施例中，所述导光板的下方设有一反射片。
在本发明的一实施例中，所述导光板的侧方设有至少一光源。
在本发明的一实施例中，所述光学膜片组包含一扩散膜，所述扩散膜设于所述增亮膜的下方。
在本发明的一实施例中，所述增亮膜是一棱镜片。
在本发明的一实施例中，所述棱镜片的棱镜延伸方向与所述背光模块的弯曲方向同一方向。
为达上述目的，本发明另提供一种柔性显示装置，包含一柔性显示屏及一背光模块，所述背光模块设于所述柔性显示屏的下方，所述背光模块包含：一导光板；及一光学膜片组，设于所述导光板的上方，所述光学膜片组包含单一个增亮膜。
在本发明的一实施例中，所述导光板的下方设有一反射片；及所述导光板的侧方设有至少一光源。
在本发明的一实施例中，所述光学膜片组包含一扩散膜，所述扩散膜设于所述增亮膜的下方。
在本发明的一实施例中，所述增亮膜是一棱镜片，所述棱镜片的棱镜延伸方向与所述的柔性显示装置的背光模块的弯曲方向同一方向。
 有益效果
在本发明中，相较于现有的柔性显示装置，本发明的所述单一个增亮膜在定向上具有较大的光线视角，因此可达到定向提高视角亮度的效果，并提高视角亮度的均匀性，从而提升所述柔性显示装置的整体显示效果。
 附图说明
图1：现有的一种柔性显示装置的背光模块的立体示意图。
图2：本发明的一种柔性显示装置的背光模块的立体示意图。
图3：本发明的一背光模块的侧视示意图(在YZ平面上)。
图4：本发明的一背光模块的侧视示意图(在XZ平面上)。
图5：本发明的一背光模块的上视示意图(在XY平面上)。
图6：本发明的一种柔性显示装置的侧视示意图(在XZ平面上)。
 本发明的实施方式
为让本发明上述目的、特征及优点更明显易懂，下文特举本发明较佳实施例，并配合附图，作详细说明。再者，本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参照附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
请参照图2所示，图2是本发明的一种柔性显示装置的背光模块的立体示意图。如图2所示，本发明的一种柔性显示装置的背光模块200主要包含一导光板210，用以提供一柔性显示屏或曲面显示屏(未绘示)所需要的背光功能。再者，为了说明上的方便，图2显示一个XYZ座标系统，所述导光板210 的两个侧边分别平行于X轴与Y轴方向，另外垂直于X轴与Y轴所形成的XY平面的是Z轴方向。
如图2所示，所述导光板210的下方设有一反射片220，所述导光板210的侧方设有至少一光源230，所述至少一光源230由所述导光板210的侧方发射光线，通过所述导光板210内部的全反射作用及所述反射片220的反射作用，将所述至少一光源230发出的光线转向所述导光板210的上方(Y轴向上的方向)发出光线。
此外，所述导光板210的上方还设有一光学膜片组240，所述光学膜片组240主要包含一扩散膜(Diffuser Film)241及单一个增亮膜(Brightness Enhancement Film; BEF)242，所述增亮膜242上排列设置多个长条状棱镜(Prism)242a，所述多个长条状棱镜242a是沿Y轴方向排列，沿X轴方向延伸，这些棱镜242a具有使光线向上收敛的效果。因此，所述导光板210向上发出的光线可先通过所述扩散膜241进行光线扩散，接着再通过所述增亮膜242使所述光线收敛。然而，一般来说，由于棱镜具有方向性，使得所述增亮膜在不同方向上的光线收敛效果不同。
请参照图3所示，图3是本发明的一背光模块的侧视示意图(在YZ平面上)，特别说明的是，为使图面更简洁，图中省略了所述扩散膜241，而直接以所述导光板210来表示所述增亮膜242下方的光源。如图3所示，由于所述增亮膜242上的多个长条状棱镜242a是沿Y轴方向排列，因此在YZ平面上具有较好的光线收敛效果，但也使得光线视角较小，例如光线的半视角θ 1为35度。
请参照图4所示，图4是本发明的一背光模块的侧视示意图(在XZ平面上)，特别说明的是，为使图面更简洁，图中省略了所述扩散膜241，而直接以所述导光板210来表示所述增亮膜242下方的光源。如图4所示，由于所述增亮膜242上的多个长条状棱镜242a是沿X轴方向延伸，因此在XZ平面上的光线收敛效果较差，但也使得光线视角较大，例如光线的半视角θ 2为52度。
请参照图5所示，图5是本发明的一背光模块的上视示意图(在XY平面上)。如图5所示，当只有使用单一张所述增亮膜242时，在观看者的水平视线方向H (平行X轴)上，具有较大的光线视角(例如半视角为52度)；但在观看者的垂直视线方向V (平行Y轴)上，具有较小的光线视角(例如半视角为35度)。
请参照图6所示，图6是本发明的一种柔性显示装置的侧视示意图(在XZ平面上)。如图6所示，所述背光模块200设于一柔性显示屏300的下方以形成一柔性显示装置，并且从图3至图5的说明中可得知所述增亮膜242在XZ平面上的光线视角较大，也就是在观看者的水平视线方向H(平行X轴)上具有较大的光线视角。
因此，如图6所示，当所述柔性显示装置弯曲或形成曲面显示器时，所述棱镜片的棱镜延伸方向(参照图5的X轴方向)与所述的柔性显示装置的弯曲方向，也就是所述背光模块的弯曲方向是同一方向时(参照图6的X轴方向)，在所述显示器的弯曲部分前方一距离的观看者，在定向上(水平视线方向上)可获的此较大的光线视角(例如半视角为52度)，因此可达到定向提高视角亮度的效果，并提高视角亮度的均匀性，从而提升所述柔性显示装置的整体显示效果。
本发明已由上述相关实施例加以描述，然而上述实施例仅为实施本发明的范例。必需指出的是，已公开的实施例并未限制本发明的范围。相反地，包含于权利要求书的精神及范围的修改及均等设置均包括于本发明的范围内。

Claims (14)

  1. 一种柔性显示装置的背光模块，其包含：
    一导光板；及
    一光学膜片组，设于所述导光板的上方，所述光学膜片组包含单一个增亮膜及一扩散膜，所述增亮膜是一棱镜片，所述扩散膜设于所述增亮膜的下方。
  2. 如权利要求1所述的背光模块，其中所述导光板的下方设有一反射片。
  3. 如权利要求1所述的背光模块，其中所述导光板的侧方设有至少一光源。
  4. 如权利要求1所述的背光模块，其中所述棱镜片的棱镜延伸方向与所述背光模块的弯曲方向同一方向。
  5. 一种柔性显示装置的背光模块，其包含：
    一导光板；及
    一光学膜片组，设于所述导光板的上方，所述光学膜片组包含单一个增亮膜。
  6. 如权利要求5所述的背光模块，其中所述导光板的下方设有一反射片。
  7. 如权利要求5所述的背光模块，其中所述导光板的侧方设有至少一光源。
  8. 如权利要求5所述的背光模块，其中所述光学膜片组包含一扩散膜，所述扩散膜设于所述增亮膜的下方。
  9. 如权利要求5所述的背光模块，其中所述增亮膜是一棱镜片。
  10. 如权利要求9所述的背光模块，其中所述棱镜片的棱镜延伸方向与所述背光模块的弯曲方向同一方向。
  11. 一种柔性显示装置，包含一柔性显示屏及一背光模块，所述背光模块设于所述柔性显示屏的下方，所述背光模块包含：
    一导光板；及
    一光学膜片组，设于所述导光板的上方，所述光学膜片组包含单一个增亮膜。
  12. 如权利要求11所述的柔性显示装置，其中所述导光板的下方设有一反射片；及所述导光板的侧方设有至少一光源。
  13. 如权利要求11所述的柔性显示装置，其中所述光学膜片组包含一扩散膜，所述扩散膜设于所述增亮膜的下方。
  14. 如权利要求11所述的柔性显示装置，其中所述增亮膜是一棱镜片，所述棱镜片的棱镜延伸方向与所述的柔性显示装置的背光模块的弯曲方向同一方向。
PCT/CN2018/117513 2018-10-09 2018-11-26 柔性显示装置及其背光模块 Ceased WO2020073445A1 (zh)

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