WO2016078124A1 - 背光模组及具有该背光模组的显示器 - Google Patents

背光模组及具有该背光模组的显示器 Download PDF

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Publication number
WO2016078124A1
WO2016078124A1 PCT/CN2014/092601 CN2014092601W WO2016078124A1 WO 2016078124 A1 WO2016078124 A1 WO 2016078124A1 CN 2014092601 W CN2014092601 W CN 2014092601W WO 2016078124 A1 WO2016078124 A1 WO 2016078124A1
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WO
WIPO (PCT)
Prior art keywords
light guide
guide plate
sheet
tape
optical film
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PCT/CN2014/092601
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English (en)
French (fr)
Inventor
周革革
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深圳市华星光电技术有限公司
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Publication of WO2016078124A1 publication Critical patent/WO2016078124A1/zh

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    • 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
    • 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
    • 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
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the present invention relates to the field of illuminating display, and in particular to a backlight module and a display having the same.
  • liquid crystal display devices such as liquid crystal displays (LCDs) have been widely used as display components in electronic products such as mobile phones, digital cameras, and personal digital assistants (PDAs).
  • LCDs liquid crystal displays
  • PDAs personal digital assistants
  • the backlight module As an important component in the liquid crystal display device, the backlight module has become a trend.
  • the narrow border means that the screen area that can be seen under the same size screen is larger and the visual effect is better.
  • the backlight module generally includes a light guide plate, a plastic frame disposed around the light guide plate, a flexible circuit board, an optical film, and a light shielding tape, and the flexible circuit board is fixed to the light guide plate by the light shielding tape. And on the plastic frame, the optical film is fixed on the plastic frame by the light shielding tape.
  • the invention provides a backlight module and a display having the same, which use fewer components, has the advantages of small overall thickness, simple structure, low cost, and simple and quick assembly process.
  • An embodiment of the present invention provides a backlight module including an optical film, a light guide plate, a reflective sheet, and a first adhesive tape.
  • the optical film is disposed in the light guide plate, and the light guide plate is disposed under the light guide plate.
  • a slot is formed at the edge of the surface, the slot is for receiving the first tape, and a peripheral side edge of the reflective sheet is adhered to the light guide plate by the first tape relative to the optical film
  • the reflective sheet is fixed to the light guide plate by the first tape.
  • the backlight module further includes a second adhesive tape, a portion of the second adhesive tape is adhered to an outer surface of the light guide plate, and another portion thereof is adhered to an outer surface edge of the optical film to The optical film is fixed in the light guide plate.
  • first adhesive tape and the second adhesive tape are both double-sided adhesive tapes, and a peripheral side edge of the reflective sheet is adhered to one side of the first adhesive tape, and a peripheral side edge of the light guide plate is adhered to The other side of the first tape.
  • the optical film comprises an upper brightness enhancement sheet, a lower brightness enhancement sheet and a diffusion sheet
  • the lower brightness enhancement sheet is located between the upper brightness enhancement sheet and the diffusion sheet
  • a part of the second adhesive tape is adhered to Another portion of the surface of the light guide plate is adhered to the upper surface edge of the upper brightness enhancement sheet.
  • the light guide plate includes a main body portion and a retaining wall, and the retaining wall is vertically disposed at an edge of the main body portion to form a groove for receiving the optical film.
  • the light-increasing sheet, the lower brightness-increasing sheet, and the diffusion sheet are sequentially arranged in an overlapping manner from an opening to a bottom wall of the groove, the main body portion is located at one side of the diffusion sheet, and a part of the second adhesive tape is adhered Another portion of the upper surface of the barrier wall attached to the light guide plate is adhered to the upper surface edge of the upper brightness enhancement sheet of the optical film.
  • the light guide plate includes a light guiding surface and a back surface opposite to the light guiding surface, the light guiding surface forming a bottom wall of the groove facing the diffusion surface of the optical film, and The diffusion surface is in contact with the back surface facing the reflection sheet and is in contact with the reflection sheet.
  • the slot is opened at an edge of the back surface of the light guide plate for receiving the first tape therein.
  • edge region of the back surface of the light guide plate is coated with a reflective coating.
  • peripheral side outer surface of the light guide plate is coated with a reflective layer
  • the reflective layer will be incident on the reflection Light from the surface of the layer is reflected back into the light guide.
  • the reflective sheet is a white reflective sheet or a silver reflective sheet, and the surface thereof is coated with a reflective layer.
  • a display including a display panel and a backlight module disposed opposite the display panel, the backlight module including an optical film, a light guide plate, a reflective sheet, and a first An optical film is disposed in the light guide plate, and a slit is further defined in a lower surface edge of the light guide plate, wherein the groove is configured to receive the first tape, and the reflective sheet is The side edge is adhered to one side of the light guide plate relative to the optical film by the first tape, and the reflective sheet is fixed on the light guide plate by the first tape, and the display panel is fixed On the optical film and the light guide plate.
  • the backlight module further includes a second adhesive tape, a portion of the second adhesive tape is adhered to an outer surface of the light guide plate, and another portion thereof is adhered to an outer surface edge of the optical film to The optical film is fixed in the light guide plate, and a peripheral side edge of the display panel is fixed to the optical film and the light guide plate by the second tape.
  • first adhesive tape and the second adhesive tape are both double-sided adhesive tapes, and a peripheral side edge of the reflective sheet is adhered to one side of the first adhesive tape, and a peripheral side edge of the light guide plate is adhered to The other side of the first tape.
  • the optical film comprises an upper brightness enhancement sheet, a lower brightness enhancement sheet and a diffusion sheet
  • the lower brightness enhancement sheet is located between the upper brightness enhancement sheet and the diffusion sheet
  • a part of the second adhesive tape is adhered to Another portion of the surface of the light guide plate is adhered to the upper surface edge of the upper brightness enhancement sheet.
  • the light guide plate includes a main body portion and a retaining wall, and the retaining wall is vertically disposed at an edge of the main body portion to form a groove for receiving the optical film.
  • the light-increasing sheet, the lower brightness-increasing sheet, and the diffusion sheet are sequentially arranged in an overlapping manner from an opening to a bottom wall of the groove, the main body portion is located at one side of the diffusion sheet, and a part of the second adhesive tape is adhered Another portion of the upper surface of the barrier wall attached to the light guide plate is adhered to the upper surface edge of the upper brightness enhancement sheet of the optical film.
  • the light guide plate includes a light guiding surface and a back surface opposite to the light guiding surface, the light guiding surface forming a bottom wall of the groove facing the diffusion surface of the optical film, and The diffusion surface is in contact with the back surface facing the reflection sheet and is in contact with the reflection sheet.
  • the slot is opened at an edge of the back surface of the light guide plate for receiving the first tape therein.
  • edge region of the back surface of the light guide plate is coated with a reflective coating.
  • the peripheral side outer surface of the light guide plate is coated with a reflective layer that reflects light incident on the surface of the reflective layer back into the light guide plate.
  • the reflective sheet is a white reflective sheet or a silver reflective sheet, and the surface thereof is coated with a reflective layer.
  • the optical film is directly fixed to the light guide plate by the second adhesive tape, and the reflective film is fixed to the optical tape by the first adhesive tape.
  • the optical film and the reflection sheet are fixed without a plastic frame, thereby eliminating the components of the back plate and the plastic frame in the existing backlight module, thereby eliminating the backlight mode.
  • the assembly gap existing in the assembly process reduces the overall thickness of the backlight module and realizes a narrow bezel design.
  • the manufacturing cost is reduced, and the assembly process of the entire backlight module is more convenient, thereby greatly improving the assembly efficiency.
  • FIG. 1 is a partial cross-sectional view of a backlight module in accordance with an embodiment of the present invention.
  • Fig. 2 is a partial cross-sectional view showing the light guide plate shown in Fig. 1.
  • FIG. 3 is a partial cross-sectional view of a display in accordance with another embodiment of the present invention.
  • FIG. 1 is a partial cross-sectional view of a backlight module according to an embodiment of the present invention.
  • a backlight module 100 may be a liquid crystal backlight module including an optical film 10 , a light guide plate 30 , and a reflective sheet 50 .
  • the optical film 10 is disposed on the light guide plate 30 for The light guide plate 30 is guided to light, and the reflective sheet 50 is mounted on the light guide plate 30.
  • the outer peripheral edges of the light guide plate 30 and the reflection sheet 50 are aligned with each other.
  • the optical film 10 is fixed to the light guide plate 30 by a tape 60 (herein defined as a second tape 60). Specifically, a portion of the second tape 60 is adhered to The outer surface of the light guide plate 30 is adhered to the outer surface edge of the optical film 10 such that the optical film 10 is more firmly fixed to the light guide plate 30.
  • the second adhesive tape 60 is a double-sided adhesive tape, which can reduce light leakage of the backlight module 100 and improve display quality.
  • the optical film 10 includes an upper brightness enhancement sheet 11, a lower brightness enhancement sheet 13, and a diffusion sheet 15.
  • the upper brightness enhancement sheet 11 , the lower brightness enhancement sheet 13 and the diffusion sheet 15 are arranged in an overlapping manner from top to bottom, that is, the lower brightness enhancement sheet 13 is located between the upper brightness enhancement sheet 11 and the diffusion sheet 15 .
  • a portion of the second tape 60 is adhered to the surface edge of the light guide plate 30, and another portion thereof is adhered to the upper surface edge of the upper brightness enhancement sheet 11.
  • FIG. 2 is a partial cross-sectional view of the light guide plate shown in FIG. 1.
  • the light guide plate 30 is made of a substrate of a polymethyl methacrylate (PMMA)/polycarbonate (PC), which is used to convert a line source into a surface source.
  • PMMA polymethyl methacrylate
  • PC polycarbonate
  • the light guide plate 30 can be formed by an integral design, and a groove 31 is defined in the middle portion thereof, and the groove 31 is used for accommodating the optical film 10, and the upper brightness enhancement sheet 11 and the lower brightness enhancement sheet 13 are
  • the diffusion sheet 15 is sequentially arranged in an overlapping manner from the opening to the bottom wall of the groove 31.
  • the light guide plate 30 includes a main body portion 33 and a retaining wall 34 which is vertically disposed at an edge position of the main body portion 33 to form the recess 31.
  • the main body portion 33 is located at one side of the optical film 10, that is, the main body portion 33 is located at one side of the diffusion sheet 15 for guiding the light guide plate 30.
  • a part of the second tape 60 is adhered to the upper surface of the barrier rib 34 of the light guide plate 30, and another portion thereof is adhered to the upper surface edge of the upper brightness enhancement sheet 11 of the optical film 10.
  • the retaining wall 34 is disposed along the edge of the main body portion 33, so that a better display effect and better fixing of the optical film 10 can be obtained.
  • the light guide plate 30 further includes a light guiding surface 36 and a back surface 37 opposite to the light guiding surface 36.
  • the light guiding surface 36 is a bottom wall of the groove 31.
  • the light guiding surface 36 faces the diffusing surface 25 of the optical film 10 and is in seamless contact with the diffusing surface 25 for guiding light.
  • the back surface 37 is a non-light incident surface that faces the reflective sheet 50 and is in seamless contact with the reflective sheet 50, so that the backlight mold can also be reduced.
  • the reflection sheet 50 is disposed opposite to the back surface 37, so that light incident on the surface of the reflection sheet 50 is totally reflected into the light guide plate 30, thereby improving display quality.
  • a slit 38 is further defined in the lower surface edge of the light guide plate 30.
  • the slot 38 is formed at an edge of the back surface 37 of the light guide plate 30 to form an annular shape at the edge of the back surface 37. Sag belt.
  • the slot 38 is for receiving a tape 70 (defined herein as a first tape 70) through which the reflective sheet 50 is adhered to the light guide plate 30.
  • the first tape 70 is placed in the slot 38, and the reflective sheet 50 is mounted on the back surface 37 of the light guide plate 30, and the peripheral side edge of the reflective sheet 50 is adhered to the first On one side of the tape 70, the peripheral side edge of the light guide plate 30 is adhered to the other side of the first tape 70, so that the reflective sheet 50 can be adhered to the light guide plate through the first tape 70. 30 on.
  • the first tape 70 is a double-sided tape, which can reduce light leakage of the backlight module 100 and improve display quality.
  • the transparent liquid glue can be used instead of the first adhesive tape 70, and the transparent liquid glue can be injected into the slot 38, and the transparent liquid glue is cured.
  • the reflective sheet may be adhered to the light guide plate.
  • the first tape 70 may be directly adhered to the lower surface edge of the light guide plate 30, but since the first tape 70 itself has a certain thickness, the reflective sheet 50 and the light guide plate 30 are Excessive gaps are created, which not only increases the overall thickness of the backlight module 100, but also may cause light leakage or affect the display effect.
  • the shape and size of the reflective sheet 50 are matched with the shape and size of the back surface 37 of the light guide plate 30.
  • the reflective sheet 50 is disposed on the back surface 37 of the light guide plate 30, and The back side 37 is in seamless contact.
  • the reflective sheet 50 is a reflective sheet having high reflectivity for improving the front view brightness of the liquid crystal backlight module when a certain light source is output.
  • the edge region of the back surface 37 of the light guide plate 30 may be coated with a reflective coating (not shown) to prevent light from the edge region of the back surface 37 of the light guide plate 30. Leak out to improve the display.
  • the outer peripheral surface of the light guide plate 30 ie, the outer sidewall of the light guide plate 30
  • a reflective layer which can be incident on the reflective layer The light of the surface is reflected back into the light guide plate, which reduces light leakage at the edge of the backlight module, thereby improving the backlight effect.
  • the retaining wall 34 is along the main The entire edges of the body 33 are provided, but are not limited.
  • the retaining wall 34 may also be disposed at a portion of the edge of the main body portion 33, for example, at an edge of the opposite sides of the main body portion 33, and the optical film 10 may be fixed.
  • the backlight module 100 may further include a light source (not shown) disposed on one side of the light guide plate 30 to provide a backlight, and the light source emits Light is incident into the light guide plate 30.
  • the light source can be an LED light source, and the LED light source adopts a DC power source and has a long service life.
  • the reflective sheet 50 may be a white reflective sheet or a silver reflective sheet, and a reflective layer coated on the surface thereof, and the coated reflective layer is made of a reflective material having a reflectance of 50% or more to improve the reflection effect.
  • the optical film 10 is disposed on the light guide plate 30, and the light guide plate 30 is mounted on the reflective sheet 50, the optical film 10 is fixed on the light guide plate 30 directly by the second adhesive tape 60.
  • the reflective sheet 50 is fixed on the light guide plate 30 through the first adhesive tape 70, so that the fixing is performed without the plastic frame.
  • the optical film 10 and the reflective sheet 50 eliminate the backplane and the plastic frame in the existing backlight module, thereby eliminating the assembly gap existing in the assembly process of the backlight module 100, thereby reducing the The overall thickness of the backlight module 100 achieves a narrow bezel design.
  • the backlight module 100 since the backlight module 100 has a simple structure, the manufacturing cost is reduced, and the assembly process of the entire backlight module 100 is more convenient, and the assembly efficiency is greatly improved.
  • FIG. 3 is a partial cross-sectional view of a display according to another embodiment of the present invention.
  • the display includes a display panel 80 and the backlight module 100 described in the above embodiment.
  • the backlight module 100 is disposed opposite to the display panel 80 to provide backlight.
  • the peripheral side edge of the display panel 80 is fixed to the backlight module 100 by the second tape 60.
  • the display panel 80 is disposed on the upper brightness enhancement sheet 11 of the optical film 10 .
  • the surface and the peripheral side edge thereof are fixed to the optical film 10 and the light guide plate 30 by the second tape 60.
  • the display panel 80 can be a liquid crystal display, and the configuration of the backlight module 100 constituting the display is the same as that of the backlight module 100 shown in FIG. 1 , and details are not described herein again.
  • the display and the backlight module 100 can be applied to any product or component having a display function, such as an electronic paper, a liquid crystal television, a liquid crystal display, a mobile phone, a digital photo frame, a tablet computer, and the like.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

一种背光模组（100）及一种显示器，背光模组（100）包括一光学膜片（10）、一导光板（30）、一反射片（50）及一第一胶带（60），光学膜片（10）设置于导光板（30）内，导光板（30）的下表面边缘处还开设有一开槽（31），开槽（31）用于容置第一胶带（60），反射片（50）的周侧边缘通过第一胶带（60）粘附于导光板（30）相对于光学膜片（10）的一侧，反射片（50）通过第一胶带（60）固定于导光板（30）上。背光模组（100）实现了在无胶框的情况下固定光学膜片（10）及反射片（50），从而省去了背板和胶框等部件，如此可减小了背光模组（100）的整体厚度，实现了窄边框设计。此外，由于背光模组（100）的结构简单，不但降低了制造成本，而且整个背光模组（100）的组装过程更加便捷。

Description

背光模组及具有该背光模组的显示器
本发明要求2014年11月17日递交的发明名称为“背光模组及具有该背光模组的显示器”的申请号为201410657272.9的在先申请优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本发明涉及发光显示领域，尤其涉及一种背光模组及一种具有该背光模组的显示器。
背景技术
随着背光显示技术的不断发展，液晶显示装置如液晶显示器(Liquid Crystal Display，LCD)作为显示部件已经广泛应用于移动电话、数码相机、个人数字助理(Personal Digital Assistant，PDA)等电子产品中。随着电子产品的边框越来越窄及液晶行业技术的不断进步，LCD画面显示的大尺寸及边框薄型化越来越成为市场的主流需求。
背光模组作为液晶显示装置中的一个重要部件，其边框化设计也成为了一种趋势，窄边框意味着在相同尺寸的屏幕下所能看到的画面面积更大视觉效果好。现有的背光模组通常包括：导光板、设置于所述导光板周围的胶框、柔性电路板、光学膜片以及遮光胶带，所述柔性电路板通过所述遮光胶带固定于所述导光板和胶框上，所述光学膜片通过遮光胶带固定在胶框上。
然而，在组装的过程中，由于导光板与胶框在组装过程中存在误差，不可避免的会使该导光板与胶框之间存在组装间隙，而且由于胶框自身存在一定的厚度，这必然会增加背光模组的厚度，进而增加了液晶显示装置的整体厚度，如此不能满足市场的主流需要。此外，现有的背光模组需要的元件较多，结构复杂，增加了制造成本；而且，胶框与导光板的组装过程比较负责繁琐，组装效率较低。
发明内容
本发明提供一种背光模组及具有该背光模组的显示器，其使用较少的元件，不但整体厚度较小，结构简单，成本较低，而且组装过程简便、快捷。
本发明一方面提供了一种背光模组，包括一光学膜片、一导光板、一反射片及一第一胶带，所述光学膜片设置于所述导光板内，所述导光板的下表面边缘处还开设有一开槽，所述开槽用于容置所述第一胶带，所述反射片的周侧边缘通过所述第一胶带粘附于所述导光板相对于所述光学膜片的一侧，所述反射片通过所述第一胶带固定于所述导光板上。
其中，所述背光模组还包括一第二胶带，该第二胶带的一部分粘附于所述导光板的外表面，其另一部分粘附于所述光学膜片的外表面边缘处，以将所述光学膜片固定于所述导光板内。
其中，所述第一胶带与所述第二胶带均为双面胶带，所述该反射片的周侧边缘粘附于所述第一胶带的一侧，该导光板的周侧边缘粘附于该第一胶带的另一侧。
其中，所述光学膜片包括一上增光片、一下增光片及一扩散片，所述下增光片位于所述上增光片与所述扩散片之间，所述第二胶带的一部分粘附于所述导光板的表面边缘处，其另一部分粘附于所述上增光片的上表面边缘。
其中，所述导光板包括主体部及挡壁，该挡壁垂直地设置于所述主体部边缘位置处，从而形成一凹槽，所述凹槽用于容置所述光学膜片，且所述上增光片、所述下增光片及所述扩散片从所述凹槽的开口至底壁处依次重叠排列，该主体部位于所述扩散片的一侧，所述第二胶带的一部分粘附于所述导光板的挡壁的上表面，其另一部分粘附于所述光学膜片的上增光片的上表面边缘处。
其中，所述导光板包括一导光面及一与所述导光面相对的背面，该导光面形成所述凹槽的底壁，其面向所述光学膜片的扩散面，并与该扩散面接触，该背面面向所述反射片，并与该反射片接触。
其中，所述开槽开设于所述导光板的背面的边缘处，其用于容置所述第一胶带于其内。
其中，所述导光板的背面的边缘区域涂覆反射涂层。
其中，所述导光板的周侧外表面涂覆有反射层，该反射层将入射到该反射 层表面的光反射回所述导光板内。
其中，所述反射片为白反射片或银反射片，其表面涂覆有反射层。
本发明另一方面提供了一种显示器，包括一显示面板及一与所述显示面板相对设置的背光模组，所述背光模组包括一光学膜片、一导光板、一反射片及一第一胶带，所述光学膜片设置于所述导光板内，所述导光板的下表面边缘处还开设有一开槽，所述开槽用于容置所述第一胶带，所述反射片的周侧边缘通过所述第一胶带粘附于所述导光板相对于所述光学膜片的一侧，所述反射片通过所述第一胶带固定于所述导光板上，所述显示面板固定于所述光学膜片及所述导光板上。
其中，所述背光模组还包括一第二胶带，该第二胶带的一部分粘附于所述导光板的外表面，其另一部分粘附于所述光学膜片的外表面边缘处，以将所述光学膜片固定于所述导光板内，所述显示面板的周侧边缘通过所述第二胶带固定于所述光学膜片及所述导光板上。
其中，所述第一胶带与所述第二胶带均为双面胶带，所述该反射片的周侧边缘粘附于所述第一胶带的一侧，该导光板的周侧边缘粘附于该第一胶带的另一侧。
其中，所述光学膜片包括一上增光片、一下增光片及一扩散片，所述下增光片位于所述上增光片与所述扩散片之间，所述第二胶带的一部分粘附于所述导光板的表面边缘处，其另一部分粘附于所述上增光片的上表面边缘。
其中，所述导光板包括主体部及挡壁，该挡壁垂直地设置于所述主体部边缘位置处，从而形成一凹槽，所述凹槽用于容置所述光学膜片，且所述上增光片、所述下增光片及所述扩散片从所述凹槽的开口至底壁处依次重叠排列，该主体部位于所述扩散片的一侧，所述第二胶带的一部分粘附于所述导光板的挡壁的上表面，其另一部分粘附于所述光学膜片的上增光片的上表面边缘处。
其中，所述导光板包括一导光面及一与所述导光面相对的背面，该导光面形成所述凹槽的底壁，其面向所述光学膜片的扩散面，并与该扩散面接触，该背面面向所述反射片，并与该反射片接触。
其中，所述开槽开设于所述导光板的背面的边缘处，其用于容置所述第一胶带于其内。
其中，所述导光板的背面的边缘区域涂覆反射涂层。
其中，所述导光板的周侧外表面涂覆有反射层，该反射层将入射到该反射层表面的光反射回所述导光板内。
其中，所述反射片为白反射片或银反射片，其表面涂覆有反射层。
相较于现有技术，在本发明实施例的背光模组中，所述光学膜片直接通过所述第二胶带固定于所述导光板上，所述反射片通过该第一胶带固定于所述导光板上，实现了在无胶框的情况下固定所述光学膜片及反射片，从而省去了现有背光模组中的背板和胶框等部件，如此不但消除了该背光模组组装过程存在的组装间隙，进而减小了所述背光模组的整体厚度，实现了窄边框设计。此外，由于所述背光模组的结构简单，不但降低了制造成本，而且整个背光模组的组装过程更加便捷，大大提高了组装效率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明一实施例的背光模组的部分截面示意图。
图2是图1所示的导光板的部分截面示意图。
图3是本发明另一实施例的显示器的部分截面示意图。
具体实施方式
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、完整地描述，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。基于本发明中的实施例，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实施例，都属于本发明保护的范围。
请参阅图1，图1是本发明一实施例的背光模组的部分截面示意图。如图1所示，本发明一实施例的背光模组100可为液晶背光模组，其包括光学膜片10、导光板30及反射片50。所述光学膜片10设置于所述导光板30上以用于 给该导光板30导光，所述反射片50装设于该导光板30上。较佳地，所述导光板30及所述反射片50的外周缘相互对齐。
在本发明的实施例中，所述光学膜片10通过一胶带60(此处定义为第二胶带60)固定于所述导光板30上，具体为，该第二胶带60的一部分粘附于所述导光板30的外表面，其另一部分粘附于所述光学膜片10的外表面边缘处，以使得该光学膜片10更加稳固地固定于所述导光板30上。在本发明的实施例中，所述第二胶带60为双面胶带，其可减少所述背光模组100的漏光，提高了显示品质。
如图1所示，在本发明的实施例中，所述光学膜片10包括上增光片11、下增光片13及扩散片15。所述上增光片11、所述下增光片13及所述扩散片15从上至下依次重叠排列，即，所述下增光片13位于所述上增光片11与所述扩散片15之间。所述第二胶带60的一部分粘附于所述导光板30的表面边缘处，其另一部分粘附于该上增光片11的上表面边缘处。
请参阅图2，图2是图1所示的导光板的部分截面示意图。所述导光板30采用光学级亚克力(Polymethylmethacrylate，PMMA)/聚碳酸酯(Polycarbonate，PC)为基材，其用于将线光源转变为面光源。所述导光板30可由一体成型设计制成，其中部开设有一凹槽31，该凹槽31用于容置所述光学膜片10，且所述上增光片11、所述下增光片13及所述扩散片15从所述凹槽31的开口至底壁处依次重叠排列。在本发明的实施例中，所述导光板30包括主体部33及挡壁34，该挡壁34垂直地设置于所述主体部33边缘位置处，从而形成所述凹槽31。所述主体部33位于所述光学膜片10的一侧，即，该主体部33位于所述扩散片15的一侧，用于给该导光板30导光。所述第二胶带60的一部分粘附于所述导光板30的挡壁34的上表面，其另一部分粘附于所述光学膜片10的上增光片11的上表面边缘处。可以理解，所述挡壁34沿着所述主体部33的边缘设置，可获得较佳的显示效果以及更好地固定所述光学膜片10。
所述导光板30还包括导光面36及与所述导光面36相对的背面37，该导光面36即为所述凹槽31的底壁。所述导光面36面向所述光学膜片10的扩散面25，并与该扩散面25无缝接触，用于导光。所述背面37为非入光面，其面向所述反射片50，并与该反射片50无缝接触，如此还可以减小所述背光模 组100的整体厚度。所述反射片50与所述背面37相对设置，可使得入射到该反射片50表面的光全部反射至所述导光板30内，从而提高了显示品质。
所述导光板30的下表面边缘处还开设有一开槽38，即，该开槽38开设于所述导光板30的背面37的边缘处，从而在所述背面37的边缘处形成环状的凹陷带。所述开槽38用于容置一胶带70(此处定义为第一胶带70)，所述反射片50通过该第一胶带70粘附与所述导光板30上。使用时，所述第一胶带70放置于所述开槽38内，所述反射片50安装于所述导光板30的背面37上，则该反射片50的周侧边缘粘附于所述第一胶带70的一侧，该导光板30的周侧边缘粘附于该第一胶带70的另一侧，如此即可将所述反射片50通过该第一胶带70粘附与所述导光板30上。
在本发明的实施例中，所述第一胶带70为双面胶带，其可减少所述背光模组100的漏光，提高了显示品质。可以理解，在本发明的其实是实施例中，可使用透明液体胶水代替所述第一胶带70，即可在所述开槽38内注入所述透明液体胶水，等该透明液体胶水固化后即可将所述反射片粘附与所述导光板上。此外，所述第一胶带70可以直接粘附在所述导光板30的下表面边缘处，但是由于该第一胶带70自身具有一定的厚度，使得所述反射片50与所述导光板30之间产生多余的缝隙，不但会增加该背光模组100整体的厚度，还可能会导致漏光或影响显示效果。
在本发明的实施例中，所述反射片50的形状和尺寸与所述导光板30的背面37的形状和尺寸相匹配，该反射片50设置于该导光板30的背面37上，并与该背面37无缝接触。所述反射片50为具有高反射率的反射片，用于在一定的光源输出时提高液晶背光模组的正视亮度。
可以理解的是，为了较佳地减少漏光，可将所述导光板30的背面37的边缘区域涂覆反射涂层(图未示)，以防止光从该导光板30的背面37的边缘区域漏出，提升显示效果。
此外，可以理解的是，在本发明的其他实施例中，所述导光板30的周侧外表面(即该导光板30的外侧壁)涂覆有反射层，该反射层可将入射到其表面的光反射回所述导光板内，减少了背光模组的边缘漏光，从而提升背光效果。
此外，本发明实施中为了获得更好的固定效果，所述挡壁34沿着所述主 体部33的全部边缘设置，但并不引以为限。该挡壁34还可以设置在所述主体部33的部分边缘处，例如设置在该主体部33的相对两边的边缘，能够固定所述光学膜片10即可。
可以理解的是，在本发明的其他实施例中，所述背光模组100还可包括光源(图未示)，该光源设置于所述导光板30的一侧以提供背光，该光源发射的光入射到该导光板30内。较佳地，该光源可以为LED光源，该LED光源采用直流电源，具有较长的使用寿命。
此外，所述反射片50可为白反射片或银反射片，其表面涂覆的反射层，该涂覆的反射层选用反射率在50％以上的反射材料，以提高反射效果。
由上述可知，在本发明实施例的背光模组100中，所述光学膜片10设置于所述导光板30上，该导光板30装设于所述反射片50上，所述光学膜片10直接通过所述第二胶带60固定于所述导光板30上，所述反射片50通过该第一胶带70固定于所述导光板30上，实现了在无胶框的情况下固定所述光学膜片10及反射片50，从而省去了现有背光模组中的背板和胶框等部件，如此不但消除了该背光模组100组装过程存在的组装间隙，进而减小了所述背光模组100的整体厚度，实现了窄边框设计。此外，由于所述背光模组100的结构简单，不但降低了制造成本，而且整个背光模组100的组装过程更加便捷，大大提高了组装效率。
请参阅图3，图3是本发明另一实施例的显示器的部分截面示意图。如图3所示，该显示器包括显示面板80及上述实施例所述的背光模组100，所述背光模组100与该显示面板80相对设置，以提供背光。具体为，所述显示面板80的周侧边缘通过所述第二胶带60与所述背光模组100进行固定，具体为，该显示面板80设置于所述光学膜片10的上增光片11的表面，且其周侧边缘通过所述第二胶带60固定于所述光学膜片10及所述导光板30上。所述显示面板80可为液晶显示屏，组成该显示器的背光模组100的构成与上述图1所示的背光模组100的构成相同，在此不再赘述。
可以理解的是，所述显示器及所述背光模组100可以应用于电子纸、液晶电视、液晶显示器、移动电话、数码相框、平板电脑等任何具有显示功能的产品或部件。
以上所揭露的仅为本发明一种较佳实施例而已，当然不能以此来限定本发明之权利范围，本领域普通技术人员可以理解实现上述实施例的全部或部分流程，并依本发明权利要求所作的等同变化，仍属于发明所涵盖的范围。

Claims (20)

  1. 一种背光模组，包括一光学膜片及一导光板，所述光学膜片设置于所述导光板内，其特征在于，所述背光模组还包括一反射片及一第一胶带，所述导光板的下表面边缘处还开设有一开槽，所述开槽用于容置所述第一胶带，所述反射片的周侧边缘通过所述第一胶带粘附于所述导光板相对于所述光学膜片的一侧，所述反射片通过所述第一胶带固定于所述导光板上。
  2. 如权利要求1所述的背光模组，其特征在于，所述背光模组还包括一第二胶带，该第二胶带的一部分粘附于所述导光板的外表面，其另一部分粘附于所述光学膜片的外表面边缘处，以将所述光学膜片固定于所述导光板内。
  3. 如权利要求2所述的背光模组，其特征在于，所述第一胶带与所述第二胶带均为双面胶带，所述该反射片的周侧边缘粘附于所述第一胶带的一侧，该导光板的周侧边缘粘附于该第一胶带的另一侧。
  4. 如权利要求2所述的背光模组，其特征在于，所述光学膜片包括一上增光片、一下增光片及一扩散片，所述下增光片位于所述上增光片与所述扩散片之间，所述第二胶带的一部分粘附于所述导光板的表面边缘处，其另一部分粘附于所述上增光片的上表面边缘。
  5. 如权利要求4所述的背光模组，其特征在于，所述导光板包括主体部及挡壁，该挡壁垂直地设置于所述主体部边缘位置处，从而形成一凹槽，所述凹槽用于容置所述光学膜片，且所述上增光片、所述下增光片及所述扩散片从所述凹槽的开口至底壁处依次重叠排列，该主体部位于所述扩散片的一侧，所述第二胶带的一部分粘附于所述导光板的挡壁的上表面，其另一部分粘附于所述光学膜片的上增光片的上表面边缘处。
  6. 如权利要求5所述的背光模组，其特征在于，所述导光板包括一导光 面及一与所述导光面相对的背面，该导光面形成所述凹槽的底壁，其面向所述光学膜片的扩散面，并与该扩散面接触，该背面面向所述反射片，并与该反射片接触。
  7. 如权利要求6所述的背光模组，其特征在于，所述开槽开设于所述导光板的背面的边缘处，其用于容置所述第一胶带于其内。
  8. 如权利要求6所述的背光模组，其特征在于，所述导光板的背面的边缘区域涂覆反射涂层。
  9. 如权利要求1所述的背光模组，其特征在于，所述导光板的周侧外表面涂覆有反射层，该反射层将入射到该反射层表面的光反射回所述导光板内。
  10. 如权利要求1所述的背光模组，其特征在于，所述反射片为白反射片或银反射片，其表面涂覆有反射层。
  11. 一种显示器，包括一显示面板，其特征在于，所述显示器还包括一与所述显示面板相对设置的背光模组，所述背光模组包括一光学膜片、一导光板、一反射片及一第一胶带，所述光学膜片设置于所述导光板内，所述导光板的下表面边缘处还开设有一开槽，所述开槽用于容置所述第一胶带，所述反射片的周侧边缘通过所述第一胶带粘附于所述导光板相对于所述光学膜片的一侧，所述反射片通过所述第一胶带固定于所述导光板上，所述显示面板固定于所述光学膜片及所述导光板上。
  12. 如权利要求11所述的显示器，其特征在于，所述背光模组还包括一第二胶带，该第二胶带的一部分粘附于所述导光板的外表面，其另一部分粘附于所述光学膜片的外表面边缘处，以将所述光学膜片固定于所述导光板内，所述显示面板的周侧边缘通过所述第二胶带固定于所述光学膜片及所述导光板上。
  13. 如权利要求12所述的显示器，其特征在于，所述第一胶带与所述第二胶带均为双面胶带，所述该反射片的周侧边缘粘附于所述第一胶带的一侧，该导光板的周侧边缘粘附于该第一胶带的另一侧。
  14. 如权利要求12所述的显示器，其特征在于，所述光学膜片包括一上增光片、一下增光片及一扩散片，所述下增光片位于所述上增光片与所述扩散片之间，所述第二胶带的一部分粘附于所述导光板的表面边缘处，其另一部分粘附于所述上增光片的上表面边缘。
  15. 如权利要求14所述的显示器，其特征在于，所述导光板包括主体部及挡壁，该挡壁垂直地设置于所述主体部边缘位置处，从而形成一凹槽，所述凹槽用于容置所述光学膜片，且所述上增光片、所述下增光片及所述扩散片从所述凹槽的开口至底壁处依次重叠排列，该主体部位于所述扩散片的一侧，所述第二胶带的一部分粘附于所述导光板的挡壁的上表面，其另一部分粘附于所述光学膜片的上增光片的上表面边缘处。
  16. 如权利要求15所述的显示器，其特征在于，所述导光板包括一导光面及一与所述导光面相对的背面，该导光面形成所述凹槽的底壁，其面向所述光学膜片的扩散面，并与该扩散面接触，该背面面向所述反射片，并与该反射片接触。
  17. 如权利要求16所述的显示器，其特征在于，所述开槽开设于所述导光板的背面的边缘处，其用于容置所述第一胶带于其内。
  18. 如权利要求16所述的显示器，其特征在于，所述导光板的背面的边缘区域涂覆反射涂层。
  19. 如权利要求11所述的显示器，其特征在于，所述导光板的周侧外表 面涂覆有反射层，该反射层将入射到该反射层表面的光反射回所述导光板内。
  20. 如权利要求11所述的显示器，其特征在于，所述反射片为白反射片或银反射片，其表面涂覆有反射层。
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