WO2017016193A1 - 背光模组及其制作方法、双面显示装置 - Google Patents

背光模组及其制作方法、双面显示装置 Download PDF

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Publication number
WO2017016193A1
WO2017016193A1 PCT/CN2016/070234 CN2016070234W WO2017016193A1 WO 2017016193 A1 WO2017016193 A1 WO 2017016193A1 CN 2016070234 W CN2016070234 W CN 2016070234W WO 2017016193 A1 WO2017016193 A1 WO 2017016193A1
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WO
WIPO (PCT)
Prior art keywords
light
unit
polarization direction
transflective
backlight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/070234
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English (en)
French (fr)
Inventor
颜凯
罗良明
金�雄
布占场
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd, Beijing BOE Display Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to US15/112,898 priority Critical patent/US20180196188A1/en
Publication of WO2017016193A1 publication Critical patent/WO2017016193A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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
    • G02B6/0056—Means for improving the coupling-out of light from the light guide for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • 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
    • 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
    • G02B6/0063—Means for improving the coupling-out of light from the light guide for extracting light out both the major surfaces of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133342—Constructional arrangements; Manufacturing methods for double-sided displays
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00—Function characteristic
    • G02F2203/09—Function characteristic transflective

Definitions

  • Embodiments of the present invention relate to the field of display technologies, and in particular, to a backlight module, a manufacturing method thereof, and a double-sided display device.
  • FIG. 1 is a schematic structural diagram of a double-sided liquid crystal display device in the prior art, including two backlight modules (not shown), two liquid crystal display panels 120 and 220, first The backlight module includes a backlight 111 and a polarizer 112. The second backlight module includes a backlight 211 and a polarizer 212.
  • the first backlight module and the liquid crystal display panel 120 form an independent liquid crystal display device 100, and the second backlight module
  • the liquid crystal display panel 220 constitutes another independent liquid crystal display device 200, and the displays of the two liquid crystal display devices do not interfere with each other.
  • the embodiment of the invention provides a backlight module, a manufacturing method thereof, and a double-sided display device. Designed to improve the light energy utilization of the backlight module.
  • a backlight module including:
  • the source is capable of emitting light in a direction toward the first transflective unit and the second transflective unit, and is capable of transmitting a direction from the first transflective unit and a second transflective Light in a direction opposite to the unit;
  • the first transflective unit is configured to transmit light in a first polarization direction and reflect light in a second polarization direction;
  • the second transflective unit is configured to transmit a second Light in a polarization direction and reflecting light in a first polarization direction; the first polarization direction and the second polarization direction being perpendicular.
  • the bi-directional backlight includes a light guide plate and a light source disposed at a side of the light guide plate.
  • At least one of the first transflective unit and the second transflective unit comprises a transflective film, a transflective lens, or a laminated glass. Tilt the stack of sheets.
  • the backlight module further includes: a depolarizing film disposed between the first transflective unit and the second transflective unit.
  • the depolarizing film is disposed between the bidirectional backlight and the first transflective unit for depolarizing light of the second polarization direction to a portion of the first polarization direction And a portion of the light of the second polarization direction and at least the light of the first polarization direction.
  • the depolarizing film is disposed between the bidirectional backlight and the second transflective unit for depolarizing light of the first polarization direction to a portion of the first polarization direction And a portion of the light of the second polarization direction and at least the light of the second polarization direction.
  • the backlight module further includes at least one of a first polarizer and a second polarizer; the first polarizer is disposed at the first transflective unit facing away from the bidirectional backlight a side for transmitting light in the first polarization direction and filtering light in the second polarization direction; the second polarizer is disposed on the second transflective unit facing away from the bidirectional backlight One side for transmitting light in the second polarization direction and filtering the light in the first polarization direction.
  • the light of the first polarization direction is one of p light and s light
  • the light of the second polarization direction is the other of p light and s light
  • a method for fabricating a backlight module includes:
  • the bidirectional backlight between the first transflective unit and the second transflective unit; wherein the bidirectional backlight is facing the first transflective unit and The second transflective unit is capable of emitting light in a direction and is capable of transmitting light from a direction of the first transflective unit and a direction of the second transflective unit; the first transflective half The anti-cell is configured to transmit light in a first polarization direction and reflect light in a second polarization direction; the second transflective unit is configured to transmit light in a second polarization direction and reflect light in a first polarization direction; The first polarization direction and the second polarization direction are perpendicular.
  • the disposing the bidirectional backlight between the first transflective unit and the second transflective unit comprises:
  • the first transflective unit and the second transflective unit are respectively attached to two opposite surfaces of the bidirectional backlight.
  • another backlight module including:
  • the source is capable of emitting light in a direction toward the first reflective brightening unit and the second reflective brightening unit, and is capable of transmitting a direction from the first reflective brightening unit and a second reflective type Brightening the light in the direction of the unit; the first reflective brightening unit and the second reflective brightening unit are both for transmitting light of the first polarization direction and depolarizing the light of the second polarization direction Light in one polarization direction and light in the second polarization direction are then reflected back to the bidirectional backlight; the first polarization direction and the second polarization direction are perpendicular.
  • the bi-directional backlight includes a light guide plate and a light source disposed at a side of the light guide plate.
  • the first reflective brightening unit includes a first transflective unit and a first depolarizing film disposed between the first transflective unit and the bidirectional backlight;
  • the second reflective brightening unit includes a second transflective unit and a second depolarizing film disposed between the second transflective unit and the bidirectional backlight.
  • the backlight module further includes a first polarizer and a second polarizer; the first polarizer is disposed on a side of the first reflective brightening unit facing away from the bidirectional backlight; The second polarizer is disposed at the second reflective brightening unit facing away from the bidirectional backlight On one side, the first polarizer and the second polarizer are both for transmitting light in a first polarization direction and filtering light in a second polarization direction.
  • the light of the first polarization direction is one of p light and s light
  • the light of the second polarization direction is the other of p light and s light
  • a method for fabricating another backlight module including:
  • the bidirectional backlight is toward the first reflective brightening unit and
  • the second reflective brightening unit is capable of emitting light in a direction and is capable of transmitting light from a direction of the first reflective brightening unit and a direction of the second reflective brightening unit; the first reflective increase
  • the bright unit and the second reflective brightening unit are both configured to transmit light in a first polarization direction, and depolarize light in a second polarization direction into light in a first polarization direction and light in a second polarization direction.
  • a bidirectional backlight; the first polarization direction and the second polarization direction are perpendicular.
  • a double-sided display device includes a first display panel, a second display panel, and a backlight module disposed between the first display panel and the second display panel.
  • the backlight module is the backlight module of any of the first aspect or the third aspect.
  • the backlight module provided by the embodiment of the invention can make the components of the two mutually perpendicular polarization directions be fully utilized by different display panels, or convert the polarized light of a specific polarization direction that cannot be utilized into another that can be utilized. A polarized light in a polarization direction, so that the double-sided display device using the backlight module provided by the embodiment of the present invention has a higher light energy utilization rate.
  • FIG. 1 is a schematic structural view of a double-sided display device in the prior art
  • FIG. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present invention.
  • FIG. 3 is a schematic view showing a possible structure of the transflective unit shown in FIG. 2;
  • FIG. 4 is a schematic structural diagram of another backlight module according to an embodiment of the present invention.
  • a backlight module is provided. As shown in FIG. 2, the backlight module includes: a first transflective unit 103, a second transflective unit 104, and a first a bidirectional backlight 101 between the transflective unit 103 and the second transflective unit 104;
  • the first transflective unit 103 is configured to transmit light in a first polarization direction (for example, p light) and reflect light in a second polarization direction (such as s light); the second transflective unit 104 is used to Transmitting light in a second polarization direction and reflecting light in a first polarization direction; the first polarization direction is perpendicular to the second polarization direction; wherein the bidirectional backlight 101 is facing the first transflective unit 103 and
  • the two half-transflective units 104 are capable of emitting light in a direction and are capable of transmitting light from the direction of the first transflective unit 103 and the direction of the second transflective unit 104.
  • the p-light can pass through the first transflective unit 103 and continue to propagate upward, so that the p-light can be located above.
  • the liquid crystal display panel is utilized, and the s light therein is reflected back to the bidirectional backlight 101. Since the bidirectional backlight 101 can transmit light from the first transflective unit 103, the portion of the light passes through the bidirectional backlight. 101.
  • both the s light and the p are fully utilized, and the light polarized in one direction is filtered out, thereby greatly improving the bidirectional back.
  • the light energy utilization rate of the light source 101 is greatly improving the bidirectional back.
  • the bidirectional backlight 101 herein may include: a light guide plate 101a and a light source 101b disposed at a side of the light guide plate, since the light guide plate 101a transmits light and is on the light guide plate 101a. Between the first transflective unit 103 and the second transflective unit 104, no light shielding or total reflection structure is provided between the light guide plate 101a and the second transflective unit 104.
  • the bidirectional backlight 101 can face the first transflective unit. Light is emitted in both the direction of the 103 and the second transflective unit 104.
  • the above-described bidirectional backlight 101 can also adopt other structures.
  • the backlight module may further include a side of the first transflective unit 103 remote from the bidirectional backlight 101 (ie, above the first transflective unit 103 ). a first polarizer 105, and a second polarizer 106 disposed on a side of the second transflective unit 104 facing away from the bidirectional backlight 101 (ie, below the second transflective unit 104), wherein A polarizer 105 is used to transmit p light and filter s light, and the second polarizer is used to transmit s light and filter p light.
  • the first transflective unit 103 may not completely reflect the s light, but may transmit a little s light, and correspondingly a small amount of p light may pass through the second transflective unit 104. This will affect the display of the LCD panel.
  • the first polarizer 10 and the second polarizer respectively above the first transflective unit 103 and below the second transflective unit 104, the first half can be avoided.
  • the s light propagating upward through the transflective unit 103 affects the display of the upper liquid crystal display panel, and the p light propagating downward through the second transflective unit 103 affects the display of the lower display panel.
  • the first polarizer and the second polarizer may not be disposed. sheet.
  • the first transflective unit 103 described above may include a stack of inclined sheets which are laminated by a glass 1031.
  • the second transflective unit 104 described above may also be a stack of inclined sheets made of glass.
  • other structures such as transflective or transflective lenses
  • the structure of the transflective unit does not affect the scope of protection of the present invention.
  • a depolarization film may be disposed between the first transflective unit 103 and the second transflective unit 104, and the depolarization film may be disposed on the light guide plate 101a and the first Between the transflective units 103, the s-light and half of the p-lights are depolarized by half, and the p-light is transmitted through the transflective unit 103; or the second transflective unit 104 and the light guide plate may be disposed.
  • the s-light and half of the p-light for dephasing the p-light, and the s-light passing therethrough may also be between the light guide plate 101a and the first transflective unit 103, and A depolarizing film is disposed between the second transflective unit 104 and the light guide plate 101a. It is not difficult to understand that whether the depolarizing film is used for the depolarization s light or the depolarization p light, and the depolarization film is disposed between the first transflective unit 103 and the second transflective unit 104.
  • the p light can only be emitted through the first transflective unit 103, and the s light can only be emitted through the second transflective unit 104.
  • Light that cannot be emitted through the first transflective unit 103 or the second transflective unit 104 is finally reflected or depolarized into light that can be emitted.
  • the embodiment of the present invention further provides a method for fabricating the backlight module of FIG. 1 , which may specifically include:
  • the bidirectional backlight between the first transflective unit and the second transflective unit; wherein the bidirectional backlight is facing the first transflective unit and
  • the second transflective unit is capable of emitting light and is capable of transmitting light from the first transflective unit direction and the second transflective unit direction;
  • the first transflective unit Transmitting light in a first polarization direction and reflecting light in a second polarization direction;
  • the second transflective unit is configured to transmit light in a second polarization direction and reflect light in a first polarization direction;
  • the polarization direction is perpendicular to the second polarization direction.
  • first transflective unit and the second transflective unit may be respectively attached to the upper and lower surfaces of the bidirectional backlight, or a back plate having a specific structure may be used to The half-reverse unit and the second transflective unit are placed above and below the bidirectional backlight, respectively.
  • the embodiment of the present invention further provides another backlight module.
  • the first and the lower side of the bidirectional backlight 101 are respectively provided.
  • the reflective brightening unit 107 and the second reflective brightening unit 108; the first reflective brightening unit 107 and the second reflective brightening unit 108 are both for transmitting light in the first polarization direction (again assumed to be p light) And decoupling the light of the second polarization direction (s light) into the light of the first polarization direction and the light of the second polarization direction and then reflecting back to the bidirectional backlight; the first polarization direction and the second polarization direction are perpendicular.
  • a polarizer 109 may be disposed above the first reflective brightening unit 107 and a polarizer 110 may be disposed under the second reflective brightening unit 108, but with FIG.
  • the embodiment shown differs in that both polarizer 109 and polarizer 110 are used to transmit p-light.
  • the 1/4 energy p light propagates downward through the second reflective brightening unit 108 to be utilized by the liquid crystal display panel located below, and the obtained 1/4 energy s light is again de-biased to 1/ The s light of 8 and the p light of 1/8 propagate upward, and in this way, the s light is finally completely depolarized and converted into p light.
  • the s light in the downward propagating light emitted by the bidirectional backlight 101 can also be finally converted into p light by the first reflective brightening unit 107 and the second reflective brightening unit 108, and is not More details.
  • the backlight module provided by the embodiment of the present invention, since the 1/2-power s light that is not available is converted into usable p-light, the utilization can be greatly improved.
  • the structure of the bidirectional backlight in this embodiment may be consistent with the structure of the bidirectional backlight in the above embodiment, and will not be described in detail herein.
  • the first reflective brightening unit 107 herein may include a first transflective unit and a first one disposed between the first transflective unit and the bidirectional backlight. a depolarizing film; correspondingly, the second reflective brightness enhancing unit 108 may further include a second transflective unit and a second depolarization disposed between the second transflective unit and the bidirectional backlight membrane.
  • the first reflective brightening unit and/or the second reflective brightening unit herein may also adopt other structures having corresponding functions.
  • the two polarizers 109 and 110 provided can also function to prevent the missed s light from affecting the display effect of the display panel.
  • the first polarized light is p light and the second polarized light is s light.
  • the first polarized light here is s light, and the second
  • the same technical effect can be achieved by the polarized light being p light, and the corresponding technical solution should also fall within the protection scope of the present invention.
  • the embodiment of the present invention further provides a method for fabricating the backlight module of FIG. 4, which may specifically include:
  • the bidirectional backlight is oriented in a direction toward the first reflective brightening unit and the second reflective brightening unit Capable of emitting light and capable of transmitting light from directions of the first reflective brightening unit and the second reflective brightening unit;
  • the first reflective brightening unit and the second reflective brightening unit are both used to transmit light Light in the polarization direction, and depolarizing the light in the second polarization direction into the light of the first polarization direction and the light of the second polarization direction and then reflecting back to the bidirectional backlight;
  • the first polarization direction and the second polarization direction are perpendicular.
  • the first reflective brightening unit and the second reflective brightening unit may be respectively attached to the upper and lower surfaces of the bidirectional backlight, or a back plate having a specific structure may be adopted, and the first reflective type may be adopted.
  • the brightening unit and the second reflective brightening unit are placed above and below the bidirectional backlight, respectively.
  • an embodiment of the present invention further provides a double-sided display device, including: a first display panel, a second display panel, and the first display panel and the second display panel
  • the backlight module may be the backlight module in any of the above embodiments.
  • the double-sided display device here can be a display function of a mobile phone, a computer, a PAD, a palmtop computer, an e-book, and the like.
  • an element or layer when an element or layer is referred to as being “on” another element or layer, it may be directly on the other element or layer, or an element or layer may be present; likewise, when the element or layer is When the other element or layer is "under”, it may be directly under the other element or layer, or there may be at least one intermediate element or layer; when the element or layer is referred to as being between the two or two layers ", it may be the only element or layer between the two elements or two layers, Or there may be more than one intermediate element or layer.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

一种背光模组及其制作方法、双面显示装置，该背光模组包括：第一半透半反单元(103)、第二半透半反单元(104)以及设置在所述第一半透半反单元(103)和所述第二半透半反单元(104)之间的双向背光源(101)；其中，所述双向背光源(101)在朝向所述第一半透半反单元(103)和所述第二半透半反单元(104)的方向上均能够发射光，且能够透过来自所述第一半透半反单元(103)的方向和所述第二半透半反单元(104)的方向的光；所述第一半透半反单元(103)用于透过第一偏振方向的光并反射第二偏振方向的光；所述第二半透半反单元(104)用于透过第二偏振方向的光并反射第一偏振方向的光；所述第一偏振方向和所述第二偏振方向垂直。采用该背光模组的双面显示装置，具有较高光学利用率。

Description

背光模组及其制作方法、双面显示装置
相关申请的交叉引用
本申请要求于2015年07月27日递交的中国专利申请第201510446791.5号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本发明实施例涉及显示技术领域，尤其涉及一种背光模组及其制作方法、双面显示装置。
背景技术
随着显示需求的多样化，除了传统的单面显示之外，有必要提供具有其他显示模式的显示装置，例如可以同时进行双面显示的显示装置。
现有技术中的双面液晶显示装置是简单的将两个液晶显示装置进行背靠背叠加，每一个液晶显示装置均包括一个背光模组和一个液晶显示面板。如图1所示，为现有技术中的一种双面液晶显示装置的结构示意图，包括两个背光模组(图中未示出其标号)，两个液晶显示面板120和220，第一背光模组包括背光源111和偏光片112，第二背光模组包括背光源211和偏光片212，第一背光模组与液晶显示面板120构成一个独立的液晶显示装置100，第二背光模组与液晶显示面板220构成另一个独立的液晶显示装置200，两个液晶显示装置的显示互不干扰。
如图1所示，在进行显示的过程中，由于偏光片的存在，使得仅有在一个方向上偏振的偏振光(假设为p光)可以透过，而与该偏振光的偏振方向垂直的偏振光(s光)则被过滤掉，这样会大大降低背光模组的光能利用率。
发明内容
本发明实施例提供一种背光模组及其制作方法、以及双面显示装置， 旨在提高背光模组的光能利用率。
根据本发明实施例的第一方面，提供一种背光模组，包括：
第一半透半反单元、第二半透半反单元以及设置在所述第一半透半反单元和所述第二半透半反单元之间的双向背光源；其中，所述双向背光源在朝向所述第一半透半反单元和所述第二半透半反单元的方向上均能够发射光，且能够透过来自第一半透半反单元的方向和第二半透半反单元的方向的光；所述第一半透半反单元用于透过第一偏振方向的光并反射第二偏振方向的光；所述第二半透半反单元用于透过第二偏振方向的光并反射第一偏振方向的光；所述第一偏振方向和所述第二偏振方向垂直。
在一个实施例中，所述双向背光源包括导光板和设置在所述导光板侧边处的发光源。
在一个实施例中，所述第一半透半反单元和所述第二半透半反单元中的至少一个包括半透半反膜、半透半反镜片、或由玻璃叠合而成的倾斜片堆。
在一个实施例中，所述背光模组还包括：设置在所述第一半透半反单元和所述第二半透半反单元之间的消偏振膜。
在一个实施例中，所述消偏振膜设置在所述双向背光源和所述第一半透半反单元之间，用于将所述第二偏振方向的光退偏为部分第一偏振方向的光和部分第二偏振方向的光并至少透过所述第一偏振方向的光。
在一个实施例中，所述消偏振膜设置在所述双向背光源和所述第二半透半反单元之间，用于将所述第一偏振方向的光退偏为部分第一偏振方向的光和部分第二偏振方向的光并至少透过所述第二偏振方向的光。
在一个实施例中，所述背光模组还包括第一偏光片和第二偏光片中的至少一个；所述第一偏光片设置在所述第一半透半反单元背离所述双向背光源的一侧，用于透过所述第一偏振方向的光并过滤所述第二偏振方向的光；所述第二偏光片设置在所述第二半透半反单元背离所述双向背光源的一侧，用于透过所述第二偏振方向的光并过滤所述第一偏振方向的光。
在一个实施例中，所述第一偏振方向的光为p光和s光中的一个，所述第二偏振方向的光为p光和s光中的另一个。
根据本发明实施例的第二方面，提供一种背光模组的制作方法，包括：
提供第一半透半反单元、第二半透半反单元和双向背光源；
将所述双向背光源设置在所述第一半透半反单元和所述第二半透半反单元之间；其中，所述双向背光源在朝向所述第一半透半反单元和所述第二半透半反单元的方向上均能够发射光，且能够透过来自第一半透半反单元的方向和第二半透半反单元的方向的光；所述第一半透半反单元用于透过第一偏振方向的光并反射第二偏振方向的光；所述第二半透半反单元用于透过第二偏振方向的光并反射第一偏振方向的光；所述第一偏振方向和所述第二偏振方向垂直。
在一个实施例中，上述将所述双向背光源设置在所述第一半透半反单元和所述第二半透半反单元之间包括：
将所述第一半透半反单元和所述第二半透半反单元分别贴附在所述双向背光源的两个相对的表面上。
根据本发明实施例的第三方面，提供了另一种背光模组，包括：
第一反射式增亮单元、第二反射式增亮单元以及设置在所述第一反射式增亮单元和所述第二反射式增亮单元之间的双向背光源；其中，所述双向背光源在朝向所述第一反射式增亮单元和所述第二反射式增亮单元的方向上均能够发射光，且能够透过来自第一反射式增亮单元的方向和第二反射式增亮单元的方向的光；所述第一反射式增亮单元和所述第二反射式增亮单元均用于透过第一偏振方向的光，并将第二偏振方向的光退偏为第一偏振方向的光和第二偏振方向的光后反射回所述双向背光源；所述第一偏振方向和所述第二偏振方向垂直。
在一个实施例中，所述双向背光源包括导光板和设置在所述导光板侧边处的发光源。
在一个实施例中，所述第一反射式增亮单元包括第一半透半反单元和设置在所述第一半透半反单元与所述双向背光源之间的第一消偏振膜；
和/或，所述第二反射式增亮单元包括第二半透半反单元和设置在所述第二半透半反单元与所述双向背光源之间的第二消偏振膜。
在一个实施例中，所述背光模组还包括第一偏光片和第二偏光片；所述第一偏光片设置在所述第一反射式增亮单元背离所述双向背光源的一侧；所述第二偏光片设置在所述第二反射式增亮单元背离所述双向背光源 的一侧，所述第一偏光片和所述第二偏光片均用于透过第一偏振方向的光并过滤第二偏振方向的光。
在一个实施例中，所述第一偏振方向的光为p光和s光中的一个，所述第二偏振方向的光为p光和s光中的另一个。
根据本发明实施例的第四方面，提供另一种背光模组的制作方法，包括：
提供第一反射式增亮单元、第二反射式增亮单元和双向背光源；
将所述双向背光源设置在所述第一反射式增亮单元和所述第二反射式增亮单元之间；其中，所述双向背光源在朝向所述第一反射式增亮单元和所述第二反射式增亮单元的方向上均能够发射光，且能够透过来自第一反射式增亮单元的方向和第二反射式增亮单元的方向的光；所述第一反射式增亮单元和所述第二反射式增亮单元均用于透过第一偏振方向的光，并将第二偏振方向的光退偏为第一偏振方向的光和第二偏振方向光后反射回双向背光源；所述第一偏振方向和所述第二偏振方向垂直。
根据本发明实施例的第五方面，还提供一种双面显示装置，包括第一显示面板、第二显示面板和设置在所述第一显示面板和所述第二显示面板之间的背光模组；所述背光模组为前述第一方面或者前述第三方面任一项所述的背光模组。
本发明实施例提供的背光模组能够使得光在两个相互垂直的偏振方向的分量分别被不同的显示面板充分利用，或者将不能被利用的特定偏振方向的偏振光转换为能够被利用的另一个偏振方向上的偏振光，从而使得采用本发明实施例提供的背光模组的双面显示装置具有较高的光能利用率。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍。
图1示出现有技术中一种双面显示装置的结构示意图；
图2示出本发明实施例提供的一种背光模组的结构示意图；
图3示出图2中示出的半透半反单元的一种可能的结构示意图；
图4示出本发明实施例提供的另一种背光模组的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整的描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他的实施例，都属于本发明保护的范围。
根据本发明的一个实施例，提供了一种背光模组，如图2所示，该背光模组包括：第一半透半反单元103、第二半透半反单元104以及设置在第一半透半反单元103和第二半透半反单元104之间的双向背光源101；
其中，第一半透半反单元103用于透过第一偏振方向的光(例如为p光)并反射第二偏振方向的光(如s光)；第二半透半反单元104用于透过第二偏振方向的光并反射第一偏振方向的光；第一偏振方向和所述第二偏振方向垂直；其中，这里的双向背光源101在朝向第一半透半反单元103和第二半透半反单元104的方向上均能够发射光，且能够透过来自第一半透半反单元103方向和第二半透半反单元104方向的光。
作为示例，结合图2对本发明实施例提供的上述背光模组的操作原理进行说明。
参见图2，对于朝向第一半透半反单元103(即朝上)出射的光，其中的p光能够透过第一半透半反单元103并继续向上传播，从而p光可以被位于上方的液晶显示面板利用，而其中的s光则被反射回双向背光源101，由于双向背光源101能够透过来自第一半透半反单元103的光，则这部分光会透过双向背光源101、到达并透过位于双向背光源101下方的第二半透半反单元104，以被位于下方的液晶显示面板利用；同样的，对于朝向第二半透半反单元104(即朝下)出射的光，其中的s光会透过双向背光源101并被位于下方的液晶显示面板利用，p光则会被反射至第一半透半反单元103并透过该第一半透半反单元103，以被位于上方的液晶显示面板利用。
根据本发明实施例提供的背光模组，s光和p都得到了充分的利用，而不是在其中的一个方向上偏振的光被过滤掉，因此能够大幅提高双向背 光源101的光能利用率。
如图2所示，在一个具体的实施例中，这里的双向背光源101可以包括：导光板101a和设置在导光板侧边处的发光源101b，由于导光板101a透光且在导光板101a与第一半透半反单元103之间，导光板101a与第二半透半反单元104之间均没有设置遮光或者全反射结构，该双向背光源101能够在朝向第一半透半反单元103和第二半透半反单元104的方向上均发射光。当然在实际应用中，上述的双向背光源101也可以采用其他的结构。
如图2所示，在具体实施时，上述的背光模组还可以包括设置在第一半透半反单元103的远离双向背光源101的一侧(即第一半透半反单元103的上方)的第一偏光片105，以及设置在第二半透半反单元104背离双向背光源101的一侧(即第二半透半反单元104的下方)的第二偏光片106，其中，第一偏光片105用于透过p光并过滤s光，第二偏光片用于透过s光并过滤p光。
由于制作工艺的原因，第一半透半反单元103可能并不能完全反射s光，而会少许的s光透过，相应的也可能少许的p光透过第二半透半反单元104，这将会影响液晶显示面板的显示效果。在本发明实施例中，通过在第一半透半反单元103的上方和第二半透半反单元104的下方分别设置第一偏光片10和第二偏光片，能够避免透过第一半透半反单元103向上传播的s光影响上方的液晶显示面板的显示，以及透过第二半透半反单元103向下传播的p光影响下方的显示面板的显示。当然可以理解，在实际应用中，在半透半反单元的性能足够好或者能够通过其他方式避免上述原因对显示效果的影响的情况下，也可以不设置上述的第一偏光片和第二偏光片。
在具体实施例中，如图3所示，上述的第一半透半反单元103可以包括由玻璃1031叠合而成的倾斜片堆。同样的，上述的第二半透半反单元104也可以为由玻璃叠合而成的倾斜片堆。当然在实际应用中，也可以采用其他结构(例如半透半反膜或者半透半反镜片等)作为半透半反单元实现相应的功能，在能够达解决本发明所要解决的基本的问题的前提下，采用何种结构的半透半反单元并不会影响本发明的保护范围。
在具体实施例中，在上述第一半透半反单元103和第二半透半反单元104之间还可以设置消偏振膜，该消偏振膜可以设置在导光板101a与第一 半透半反单元103之间，用于将s光退偏为一半的s光和一半的p光，并透过其中的p光；也可以设置在第二半透半反单元104与导光板101a之间，用于将p光退偏为一半的s光和一半的p光，并透过其中的s光，还可以在导光板101a与第一半透半反单元103之间、以及在第二半透半反单元104与导光板101a之间都设置消偏振膜。不难理解的是，不管是消偏振膜用于退偏s光还是退偏p光，也不管消偏振膜设置在第一半透半反单元103和第二半透半反单元104之间的哪个位置，在本实施例提供的相应的背光模组中，p光都均只能通过第一半透半反单元103出射，s光都只能通过第二半透半反单元104出射，而对于不能通过该第一半透半反单元103或第二半透半反单元104射出的光最终被反射或退偏为能够出射的光。
另一方面，本发明实施例还提供一种可用于制作图1中的背光模组的方法，该方法可以具体包括：
提供第一半透半反单元、第二半透半反单元和双向背光源；
将所述双向背光源设置在所述第一半透半反单元和所述第二半透半反单元之间；其中，所述双向背光源在朝向所述第一半透半反单元和所述第二半透半反单元的方向均能够发射光，且能够透过来自第一半透半反单元方向和第二半透半反单元方向的光；所述第一半透半反单元用于透过第一偏振方向的光并反射第二偏振方向的光；所述第二半透半反单元用于透过第二偏振方向的光并反射第一偏振方向的光；所述第一偏振方向和所述第二偏振方向垂直。
在具体实施例中，可以将第一半透半反单元和第二半透半反单元分别贴附在双向背光源的上下表面上，或者可以采用具有特定结构的背板，将第一半透半反单元和第二半透半反单元分别置于双向背光源上方和下方。
本发明实施例还提供另一种背光模组，参考图4，其与图2所示的实施例提供的背光模组不同的是，在双向背光源101的上方和下方分别设置的是第一反射式增亮单元107和第二反射式增亮单元108；第一反射式增亮单元107和第二反射式增亮单元108均用于透过第一偏振方向的光(同样假设为p光)，并将第二偏振方向的光(s光)退偏为第一偏振方向的光和第二偏振方向光后反射回双向背光源；第一偏振方向和第二偏振方向垂直。
另外，与图1所示的实施例相同，可以在第一反射式增亮单元107的上方设置偏光片109并在第二反射式增亮单元108的下方设置偏光片110，但是与图1所示的实施例不同的是，偏光片109和偏光片110均用于透过p光。
同样结合图4对本发明实施例提供的另一种背光模组的操作原理进行说明。对于由双向背光源101发射的向上传播的光，其中1/2能量的p光能够透过第一反射式增亮单元107向上传播，以被位于上方的液晶显示面板利用，而其中的1/2能量的s光则会退偏为1/4能量的s光和1/4能量的p光并被反射到第二反射式增亮单元108，1/2能量的s光退偏后得到的1/4能量的p光透过第二反射式增亮单元108向下传播，以被位于下方的液晶显示面板利用，而所得到的1/4能量的s光则再次被退偏为1/8的s光和1/8的p光后向上传播，按照这种方式，s光最终被完全退偏，转换为p光。同样地，对于由双向背光源101发射的向下传播的光中的s光也能够通过第一反射式增亮单元107和第二反射式增亮单元108最终转换为p光出射，在此不再详细说明。根据本发明实施例提供的背光模组，由于将不可用的1/2能量的s光转换为可用的p光，因此能够大幅提高利用率。
本实施例中的双向背光源的结构可以与上述实施例中的双向背光源的结构一致，在此不再详细说明。
在一种具体实施例中，这里的第一反射式增亮单元107可以包括第一半透半反单元和设置在所述第一半透半反单元与所述双向背光源之间的第一消偏振膜；相应的，第二反射式增亮单元108也可以包括第二半透半反单元和设置在所述第二半透半反单元与所述双向背光源之间的第二消偏振膜。当然在其他实施例中，这里的第一反射式增亮单元和/或第二反射式增亮单元也可以采用其他具有相应功能的结构。
同样的，在本发明实施例中，所设置的两个偏光片109和110也能够起到避免漏过的s光影响显示面板的显示效果的作用。
需要说明的是，虽然上述的各个实施例中，是以第一偏振光为p光，第二偏振光为s光进行的说明，但是可以理解，这里的第一偏振光为s光，第二偏振光为p光也能够达到同样的技术效果，相应的技术方案也应该落入本发明的保护范围。
另一方面，本发明实施例还提供了一种可用于制作图4中的背光模组的方法，该方法可以具体包括：
提供第一反射式增亮单元、第二反射式增亮单元和双向背光源；
将双向背光源设置在第一反射式增亮单元和第二反射式增亮单元之间；其中，双向背光源在朝向第一反射式增亮单元和第二反射式增亮单元的方向上均能够发射光，且能够透过来自第一反射式增亮单元和第二反射式增亮单元方向的光；第一反射式增亮单元和第二反射式增亮单元均用于透过第一偏振方向的光，并将第二偏振方向的光退偏为第一偏振方向的光和第二偏振方向光后反射回双向背光源；所述第一偏振方向和所述第二偏振方向垂直。
在具体实施例中，可以将第一反射式增亮单元和第二反射式增亮单元分别贴附在双向背光源的上下表面上，或者可以采用具有特定结构的背板，将第一反射式增亮单元和第二反射式增亮单元分别置于双向背光源上方和下方。
再一方面，本发明实施例还提供了一种双面显示装置，该双面显示装置包括：第一显示面板、第二显示面板和设置在所述第一显示面板和所述第二显示面板之间的背光模组；这里的背光模组可以为上述任一实施例中的背光模组。
这里的双面显示装置可以为手机、电脑、PAD、掌上电脑、电子书等具有显示功能的产品。
需要说明的是，在本发明的描述中，术语“上”、“之上”、“下”、“之下”、“顶”、“底”、“之间”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，当元件或层被称为在另一元件或层“上”时，它可以直接在该另一元件或层上，或者可以存在中间的元件或层；同样，当元件或层被称为在另一元件或层“下”时，它可以直接在该另一元件或层下，或者可以存在至少一个中间的元件或层；当元件或层被称为在两元件或两层“之间”时，其可以为该两元件或两层之间的唯一的元件或层， 或者可以存在一个以上的中间元件或层。
此外，当介绍本申请的元素及其实施例时，冠词“一”、“一个”、“该”和“所述”旨在表示存在一个或者多个要素；除非另有说明，“多个”的含义是两个或两个以上；用语“包含”、“包括”、“含有”和“具有”旨在包括性的并且表示可以存在除所列要素之外的另外的要素；术语“第一”、“第二”、“第三”等仅用于描述的目的，而不能理解为指示或暗示相对重要性。
以上所述，仅为本发明的具体实施方式，但是，本发明的保护范围不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替代，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (17)

  1. 一种背光模组，其特征在于，包括：
    第一半透半反单元、第二半透半反单元以及设置在所述第一半透半反单元和所述第二半透半反单元之间的双向背光源；其中，所述双向背光源在朝向所述第一半透半反单元和所述第二半透半反单元的方向上均能够发射光，且能够透过来自所述第一半透半反单元的方向和所述第二半透半反单元的方向的光；所述第一半透半反单元用于透过第一偏振方向的光并反射第二偏振方向的光；所述第二半透半反单元用于透过第二偏振方向的光并反射第一偏振方向的光；所述第一偏振方向和所述第二偏振方向垂直。
  2. 如权利要求1所述的背光模组，其特征在于，所述双向背光源包括导光板和设置在所述导光板侧边处的发光源。
  3. 如权利要求1所述的背光模组，其特征在于，所述第一半透半反单元和所述第二半透半反单元中的至少一个包括半透半反膜、半透半反镜片、或由玻璃叠合而成的倾斜片堆。
  4. 如权利要求1所述的背光模组，其特征在于，还包括：设置在所述第一半透半反单元和所述第二半透半反单元之间的消偏振膜。
  5. 如权利要求4所述的背光模组，其特征在于，所述消偏振膜设置在所述双向背光源和所述第一半透半反单元之间，用于将所述第二偏振方向的光退偏为部分第一偏振方向的光和部分第二偏振方向的光并至少透过所述第一偏振方向的光。
  6. 如权利要求4所述的背光模组，其特征在于，所述消偏振膜设置在所述双向背光源和所述第二半透半反单元之间，用于将所述第一偏振方向的光退偏为部分第一偏振方向的光和部分第二偏振方向的光并至少透过所述第二偏振方向的光。
  7. 如权利要求1-6任一项所述的背光模组，其特征在于，还包括第一偏光片和第二偏光片中的至少一个；所述第一偏光片设置在所述第一半透半反单元背离所述双向背光源的一侧，用于透过所述第一偏振方向的光并过滤所述第二偏振方向的光；所述第二偏光片设置在所述第二半透半反单元背离所述双向背光源的一侧，用于透过所述第二偏振方向的光并过滤所述第一偏振方向的光。
  8. 如权利要求1-7任一项所述的背光模组，其特征在于，所述第一偏振方向的光为p光和s光中的一个，所述第二偏振方向的光为p光和s光中的另一个。
  9. 一种背光模组的制作方法，其特征在于，包括：
    提供第一半透半反单元、第二半透半反单元和双向背光源；
    将所述双向背光源设置在所述第一半透半反单元和所述第二半透半反单元之间；其中，所述双向背光源在朝向所述第一半透半反单元和所述第二半透半反单元的方向上均能够发射光，且能够透过来自所述第一半透半反单元的方向和所述第二半透半反单元的方向的光；所述第一半透半反单元用于透过第一偏振方向的光并反射第二偏振方向的光；所述第二半透半反单元用于透过第二偏振方向的光并反射第一偏振方向的光；所述第一偏振方向和所述第二偏振方向垂直。
  10. 如权利要求9所述的制作方法，其特征在于，将所述双向背光源设置在所述第一半透半反单元和所述第二半透半反单元之间包括：
    将所述第一半透半反单元和所述第二半透半反单元分别贴附在所述双向背光源的两个相对的表面上。
  11. 一种背光模组，其特征在于，包括：
    第一反射式增亮单元、第二反射式增亮单元以及设置在所述第一反射式增亮单元和所述第二反射式增亮单元之间的双向背光源；其中，所述双向背光源在朝向所述第一反射式增亮单元和所述第二反射式增亮单元的方向上均能够发射光，且能够透过来自所述第一反射式增亮单元的方向和所述第二反射式增亮单元的方向的光；所述第一反射式增亮单元和所述第二反射式增亮单元均用于透过第一偏振方向的光，并将第二偏振方向的光退偏为第一偏振方向的光和第二偏振方向的光后反射回所述双向背光源；所述第一偏振方向和所述第二偏振方向垂直。
  12. 如权利要求11所述的背光模组，其特征在于，所述双向背光源包括导光板和设置在所述导光板侧边处的发光源。
  13. 如权利要求11所述的背光模组，其特征在于，所述第一反射式增亮单元包括第一半透半反单元和设置在所述第一半透半反单元与所述双向背光源之间的第一消偏振膜；
    和/或，所述第二反射式增亮单元包括第二半透半反单元和设置在所述第二半透半反单元与所述双向背光源之间的第二消偏振膜。
  14. 如权利要求11-13任一项所述的背光模组，其特征在于，还包括第一偏光片和第二偏光片中的至少一个；所述第一偏光片设置在所述第一反射式增亮单元背离所述双向背光源的一侧；所述第二偏光片设置在所述第二反射式增亮单元背离所述双向背光源的一侧，所述第一偏光片和所述第二偏光片均用于透过第一偏振方向的光并过滤第二偏振方向的光。
  15. 如权利要求11-14任一项所述的背光模组，其特征在于，所述第一偏振方向的光为p光和s光中的一个，所述第二偏振方向的光为p光和s光中的另一个。
  16. 一种背光模组的制作方法，其特征在于，包括：
    提供第一反射式增亮单元、第二反射式增亮单元和双向背光源；
    将所述双向背光源设置在所述第一反射式增亮单元和所述第二反射式增亮单元之间；其中，所述双向背光源在朝向所述第一反射式增亮单元和所述第二反射式增亮单元的方向上均能够发射光，且能够透过来自所述第一反射式增亮单元的方向和所述第二反射式增亮单元的方向的光；所述第一反射式增亮单元和所述第二反射式增亮单元均用于透过第一偏振方向的光，并将第二偏振方向的光退偏为第一偏振方向的光和第二偏振方向光后反射回双向背光源；所述第一偏振方向和所述第二偏振方向垂直。
  17. 一种双面显示装置，其特征在于，包括第一显示面板、第二显示面板和设置在所述第一显示面板和所述第二显示面板之间的背光模组；所述背光模组为如权利要求1-8和权利要求11-15中任一项所述的背光模组。
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